Information
-
Patent Grant
-
6834826
-
Patent Number
6,834,826
-
Date Filed
Thursday, April 11, 200222 years ago
-
Date Issued
Tuesday, December 28, 200419 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
Field of Search
US
- 242 555
- 242 5551
- 242 5553
- 242 5554
- 242 5556
- 242 556
- 242 551
- 242 554
- 242 560
- 242 561
- 242 563
- 242 558
- 242 559
- 242 5601
- 242 5541
- 242 5591
- 242 5593
- 242 5631
-
International Classifications
-
Abstract
Film rolls at the delivery position and the standby position are supported by supporting units. The roll is passed from the standby position to the delivery position by means of the conveying member provided in the roll conveying unit. As a result, it is not necessary to support the rolls at the individual positions by use of the roll conveying unit, thus permitting simplification of the configuration of the unit. The conveying member has a configuration in which the same is attached to a conveying chain put around the sprockets to make it possible to achieve circumferential travel of the conveying member by a single driving motor. When delivering by connecting to the film from the delivery position, the leading end easily comes off the holding unit by inserting the folded leading end of the film from the standby position and holding the same there.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a film connecting/feeding apparatus to be incorporated into a wrapping system. More particularly, the invention relates to a film connecting/feeding apparatus which makes it possible to continuously feed a film by connecting a trailing end of a film delivered from a film roll and a leading end of a spare film roll.
2. Description of the Related Art
Conventionally known film connecting/feeding apparatuses of this type include those disclosed in Japanese Unexamined Patent Application Publications Nos. 4-338056, 6-278921, 5-97122, and
5-112326.
Among others, Japanese Unexamined Patent Application Publications Nos. 4-338056 and 6-278921 disclose conventional apparatus having features in a conveying unit of the film roll.
As shown in
FIG. 17
, the web feeding apparatus
200
(film connecting/feeding apparatus) in 4-338056 comprises a rewinding position
202
, a standby position
204
and a feeding position
205
, and has a configuration in which the trailing end of a web
201
a
delivered from a web roll
201
held at the rewinding position
202
and the leading end of a web
203
a
delivered from a spare web roll
203
held at the standby position
204
are connected at the connecting position
205
.
The web feeding apparatus
200
has an annular driving belt
206
travelling around between the rewinding position
202
and the standby position
204
, and three bearings
207
are attached to the annular driving belt
206
at equal intervals. These bearings
207
can rotatably support web rolls, respectively.
When one
207
of these bearings
207
is moved to the rewinding position
202
and arranged there, another bearing
207
is moved to the standby position
204
and arranged there. The remaining bearing
207
is in standby at the middle among the positions.
As shown in
FIG. 18
, the web connecting/feeding apparatus
300
disclosed in Japanese Unexamined Patent Application Publication No. 6-278921 has swinging levers
304
and
305
. One
304
of the levers rotatably holds a spare web roll
303
a
at the tip thereof, and the other lever
305
rotatably holds a delivery web roll
303
b
. The levers
304
and
305
are driven by driving mechanisms
306
and
307
, respectively.
When all the web is delivered from the delivery web roll
303
b
, the lever
305
swings counterclockwise in
FIG. 18
, and excludes the roll core remaining at the tip of the lever
305
. Subsequently, the levers
304
and
305
oscillate in synchronization, and the web roll
303
a
held at the tip of the lever
304
is passed to the tip of the lever
305
.
Japanese Unexamined Patent Application Publications Nos. 5-971122 and 5-112326 disclose conventional apparatuses characterized by spare film leading end holding means at a connecting position.
The automatic connecting apparatus of a wrapping film disclosed in 5-97122 has a configuration in which the leading end of a film is held by vacuum sucking to bring the same into standby at the connecting position.
The paper connecting apparatus disclosed in 5-112326 has a configuration in which the leading end of a web is held by means of an adhesive tape to bring the same into standby at the connecting position.
As described above, the web feeding apparatus disclosed in Japanese Unexamined Patent Application Publication No. 4-338056 has a configuration in which the bearing
207
is provided directly on the annular driving belt
206
travelling around between the rewinding position
202
and the standby position
204
, and the web rolls
201
and
203
are held at the individual positions
202
and
204
by means of this bearing
207
. The bearing
207
rotatably supporting the web rolls should have a strong structure capable of withstanding the load and rotating force of the web rolls.
A plurality of such bearings
207
having a strong structure as described above are necessary. In addition, in order to support these bearings
207
by an annular driving belt
206
such as a chain or a belt, it is necessary to impart a strength sufficient to resist to the action of a considerable load to the annular driving belt
206
. Comprehensive satisfaction of these requirements poses a problem of a very high manufacturing cost.
Also in the web connecting/feeding apparatus
300
disclosed in 6-278921, provision of driving sections
306
and
307
for the levers
304
and
305
holding the web roll leads to troublesome control and poses the problem of a high manufacturing cost of the apparatus.
In the apparatus disclosed in 5-97122 and 5-112326, the film (web) leading end is held at the connecting position by an adhesive tape or vacuum sucking. These holding means use a large holding force in general acting on the film. This may cause a positional shift of the film from the delivery track when stripping off the film from the connecting position after connection of the film, thus impairing stable continuous delivery of the film.
SUMMARY OF THE INVENTION
The present invention was developed in view of these circumstances, and has an object to ensure stable continuous delivery of the film with a low manufacturing cost.
To achieve the above-mentioned object, the film connecting/feeding apparatus has a configuration in which there are set a delivery position where a delivery film roll is held; a standby position where a spare film roll is held; and a connecting position where a leading end of a film delivered from the spare film roll is held, and the leading end and a film delivered from the delivery position are connected; the apparatus comprising delivery supporting means, provided at the delivery position, which rotatably supports the axial core of a delivery film roll, and standby supporting means, provided at the standby position, which supports the axial core of the spare film roll; and an endless belt member which is put around a rotary member and circumferentially travels, and roll conveying means which comprises a conveying member which is attached to this endless belt member, and holds the axial core of the film roll; wherein the roll conveying means receives a spare film roll by means of the conveying member from the standby supporting means, conveys the film roll to the delivery position, and passes the same to the delivery supporting means.
According to the present invention in which there are provided delivery supporting means and standby supporting means which support the film roll, respectively, at the delivery position and the standby position, the necessity is eliminated to impart a function for supporting the film roll to the roll conveying means accounting for a particularly large ratio among items of parts cost of the apparatus. It is therefore possible to achieve a simpler configuration of the roll conveying means and thus to reduce the manufacturing cost for the apparatus as a whole.
Since the roll conveying means has a configuration in which the endless belt means is wound around the rotary members and the conveying member is attached to this endless belt member, it is possible to cause a circumferential movement of the conveying member by the rotational driving force by rotating the rotary member with a single driving source. It is not therefore necessary to provide a plurality of driving sources, thus permitting reduction of the number of driving sources, leading to a lower cost of the apparatus.
The film connecting/feeding apparatus of the invention may further comprise a discharge path for discharging the axial core having delivered the film; wherein the conveying member of the roll conveying means further receives an axial core having delivered the film, remaining at the delivery position from the delivery supporting means, and conveys the same to the discharge path.
According to this configuration, an axial core of which the film has been delivered to the delivery position never remains, and it is thus possible to pass a film roll without any trouble to the delivery supporting means by the conveying member.
The apparatus of the invention may have a configuration in which an operating board is attached to the apparatus main body so as to be opened and closed; a holding member which holds an inserted folded portion formed by folding the leading end of the film delivered from the standby position, with a side of the operating board as an operating surface is attached to the operating surface; and in the closed state of the operating board, the holding member is positioned at the connecting position.
According to this configuration, the holding member holding the leading end of the film delivered from the standby position can be positioned at the connecting position in the closed state of the operating board. It is therefore possible to accurately position the leading end of the film and stably accomplish connection with the film delivered from the delivery position.
Because the folded portion formed by folding the leading end of the film is held by inserting the same into the holding member, it is possible to prevent occurrence of a positional shift of the film as a result of easy trip of the leading end of the film from the holding member upon delivery after film connection.
The apparatus of the invention may have a configuration in which an operating position for carrying out an operation of folding the leading end of the film delivered from the standby position and causing the holding member to hold the folded position is set on the front side of the apparatus main body; and the operating board is arranged so that, in the opened state, the operating surface is placed upward at the operating position.
According to this configuration, it is possible to cause the holding member to easily hold the leading end of the film at the operating position, and improve operability thereof.
The apparatus of the invention may have a configuration in which an edge positioning section which guides edges on both sides of the film delivered from the standby position is formed on the operating surface of the operating board.
According to this configuration, it is possible to easily accomplish positioning of both edges of the film.
The apparatus of the invention may have an operating board made of a transparent material. By adopting this configuration, even when the operating board is closed, it is possible to easily confirm the internal state of the apparatus, thus permitting easier maintenance control.
The apparatus of the invention may have a configuration in which a feeding position at which the film roll is fed to the standby position, a discharge position set at the terminal end of the discharge path, and the operating position are arranged in the height direction on the front side of the apparatus main body.
In this configuration, the operation of feeding the film roll, the operation of holding the leading end of the film by the holding member, and the operation of removing the axial core after delivery of the film can be conducted on the front side of the apparatus main body, thus permitting remarkable improvement of operating efficiency.
The apparatus of the invention may have a configuration in which the apparatus comprises end detecting means which detects the end of the film delivered from the delivery position at a prescribed detecting position; and connecting position aligning means which delivers the end portion of the film of which the end has been detected by the end detecting means to the connecting position in response to the distance between the detecting position and the connecting position.
By adopting such a configuration, it is possible to achieve a wrapping loss under a pitch of wrapping bag during connection with the spare film, thus permitting minimization of wrapping loss.
The apparatus of the invention may have a configuration in which the apparatus comprises registration mark detecting means which detects a registration mark attached to the film delivered from the delivery position at a prescribed position; wrapping length storing means which stores a wrapping length set on the film delivered from the delivery position; and registration mark aligning means which aligns a registration mark position of a film of which the end has been detected by the end detecting means and of which the registration mark has been detected by the registration mark detecting means with the registration mark position of a film of which the leading end portion has been held at the connecting position, on the basis of a wrapping length stored in the wrapping length storing means and the distance between the registration mark detecting position and the connecting position.
According to this configuration, for various films of different wrapping lengths, it is possible to carry out pattern alignment automatically simultaneously with connection of films with reference to registration mark, thus improving operability.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a side view illustrating an overall configuration of a wrapping system into which the film connecting/feeding apparatus of the present invention is incorporated;
FIG. 2A
is a side view illustrating an overall configuration of the film connecting/feeding apparatus of the invention;
FIG. 2B
is an enlarged view of the opening/closing center axis and the inserting/guiding portion of a film based on a film guiding pin and a coil spring of the film connecting/feeding apparatus of the invention;
FIG. 3
is an enlarged side view of the configuration of the delivery supporting unit in the film connecting/feeding apparatus of the invention;
FIG. 4
is a plan view illustrating the configuration of the holding unit in the film connecting/feeding apparatus of the invention;
FIG. 5
is a partially enlarged side sectional view illustrating the configuration of the holding unit and the connecting unit in the film connecting/feeding apparatus of the invention;
FIG. 6
is a perspective view illustrating the holding method of the film leading end by the holding unit in the film connecting/feeding apparatus of the invention;
FIG. 7
is a block diagram illustrating the control system in the film connecting/feeding apparatus of the invention;
FIGS. 8A and 8B
are a principle view illustrating the calculating method of the amount of film delivery in the film connecting position aligning control operation of the film connecting/feeding apparatus of the invention;
FIG. 9
is a flowchart illustrating the film connecting position aligning control operation in the film connecting/feeding apparatus of the invention;
FIG. 10
is a flowchart, following that shown in
FIG. 9
, illustrating the film connecting position aligning control operation in the film connecting/feeding apparatus of the invention;
FIG. 11
is a flowchart illustrating the sealing control operation in the film connecting/feeding apparatus of the invention;
FIG. 12
is a flowchart illustrating the film roll replacing control operation in the film connecting/feeding apparatus of the invention;
FIG. 13
is a flowchart illustrating the maintenance operation of the film connecting/feeding apparatus of the invention;
FIG. 14
is a side view of the film connecting/feeding apparatus for illustrating the film replacing operation in the film connecting/feeding apparatus of the invention;
FIG. 15
is a side view of the film connecting/feeding apparatus following that shown in
FIG. 14
for illustrating the film replacing operation in the film connecting/feeding apparatus of the invention;
FIG. 16
is a side view for illustrating the maintenance operation of the film connecting/feeding apparatus of the invention;
FIG. 17
is a side view illustrating the configuration of a conventional film connecting/feeding apparatus; and
FIG. 18
is a side view illustrating the configuration of another conventional film connecting/feeding apparatus.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Optimum embodiments of the present invention will now be described with reference to the drawings.
[Overall Configuration of Wrapping Unit and Film Connecting/Feeding Apparatus]
First, the overall configurations of a wrapping system to which the film connecting/feeding apparatus of the invention is applicable, and the film connecting/feeding apparatus of the invention will now be described.
As shown in
FIGS. 1 and 2A
, the film connecting/feeding apparatus
1
is incorporated into the upstream side (right side in
FIG. 1
) of a wrapping system
120
. A delivery position
10
, a standby position
20
, and a connecting position
30
are set in the interior of the apparatus main body
2
of this film connecting/feeding apparatus
1
.
A delivery supporting unit
40
is provided at the delivery position
10
, and this delivery supporting unit
40
supports a delivery film roll
11
.
A film
12
delivered from the film roll
11
supported at the delivery position
10
is delivered while being guided by guiding rollers
3
a
to
3
c
. Delivery is conducted by a delivery roller
4
. The delivered film
12
is supplied to an upright bag-making/filling wrapping machine
121
arranged in the downstream (left side in
FIG. 1
) of the wrapping system
120
. The delivery roller
4
is rotation-driven by a delivery motor
5
, and the film
12
is delivered by the rotation driving force of this delivery motor
5
.
A standby supporting unit
50
is provided at the standby position
20
. A spare film roll
21
is supported by the standby supporting unit
50
. This standby supporting unit
50
is provided continuously up to the feeding position
50
a
of the spare film roll
21
formed on the front side of the standby supporting unit
50
.
A roll conveying unit
60
is provided in the apparatus main body
2
. The roll conveying unit
60
receives the spare film roll
21
from the standby position
20
and can pass the film roll
21
to the delivery position
10
.
The roll conveying unit
60
receives an axial core
11
b
having delivered the film remaining at the delivery position
10
and pass the axial core
11
b
to a discharge unit
70
arranged at the bottom of the apparatus main body
2
to permit discharge thereof.
The terminal end portion of the discharge unit
70
extends to the bottom of the front of the apparatus main body
2
. The terminal end portion is set at a discharge position
70
a
of the axial core
11
b
after film delivery.
A holding unit
80
is provided at the top opening of the apparatus main body
2
so as to be opened and closed. In the closed state of the top opening of the apparatus main body
2
, the holding unit
80
is in contact with the connecting position
30
. The holding unit
80
can hold the leading end portion
22
a
of the film
22
delivered from the spare film roll
21
at this connecting position
30
.
In the opened state of the top opening of the apparatus main body
2
, the holding unit
80
is in contact with an operating position
80
a
set on the top of the front of the apparatus main body
2
. At this operating position
80
a
, the holding unit
80
holds the leading end portion of the film
22
delivered from the spare film roll
21
.
A connecting unit
90
is provided below the holding unit
80
. When all the film
12
is delivered from the delivery position
10
, the connecting unit
90
has a function of heat-sealing the terminal end portion of the film
12
and the leading end portion
22
a
of the film
22
delivered from the standby position
20
at the connecting position
30
.
A terminal end position sensor
6
is provided in the apparatus main body
2
, and the terminal end position of the film
12
delivered from the delivery position
10
can be detected by the sensor
6
.
[Film Roll Supporting Unit, Roll Conveying Unit, and Discharge Unit]
The film roll supporting unit, the roll conveying unit and the discharge unit will now be described with reference to
FIGS. 2A
,
2
B and
3
.
The delivery supporting unit
40
has each two bearings
41
a
to
41
d
at upper and lower portions with the delivery position
10
in between, and these bearings
41
a
to
41
d
rotatably support the axial core
11
a
of the delivery film roll
11
. Therefore, when the film
12
is delivered from the film roll
11
and the axial core
11
a
rotates, the bearings
41
a
to
41
d
are rotated accordingly. As a result, it is possible to prevent mutual wear of the axial core
11
a
and the bearings
41
a
to
41
d.
From among these bearings
41
a
to
41
d
, the lower bearings
41
a
and
41
b
are fixed at the installation positions to the apparatus main body
2
. The upper bearings
41
c
and
41
d
are attached, on the other hand, to an air cylinder
42
, and are vertically movable under action of this air cylinder
42
.
In this configuration, when the air cylinder
42
is driven, the upper bearings
41
c
and
41
d
move downward, and the axial core
11
a
of the delivery film roll
11
is held between the lower bearings
41
a
and
41
b
. The axial core
11
a
is therefore stably supported without a play.
On the other hand, when the upper bearings
41
c
and
41
d
are moved upward by driving the air cylinder
42
, it is possible to separate these bearings
41
c
and
41
d
from the lower bearings
41
a
and
41
b
. As a result, it is possible to easily cause the axial core
11
a
of the delivery film roll
11
to come off these bearings
41
a
to
41
d.
The standby supporting unit
50
has a pair of feeding rails
51
on both sides thereof. The feeding rail
51
extends to the front side of the apparatus main body
2
. The trailing end thereof is arranged at the standby position
20
, and the front end thereof is arranged at a feeding position
50
a.
The feeding position
50
a
should preferably be set at a height allowing supply of the film roll
21
without operator's bending down.
The feeding rail
51
is formed in downward inclination from the front end toward the trailing end. A cavity
52
is formed by bending upward the trailing end. Therefore, when the film roll
21
is fed from the feeding position
50
a
, the axial core
21
a
moves under gravity to the trailing end while rolling on the feeding rails
51
. The axial core
21
a
of the film roll
21
having moved to the trailing end of the feeding rail
51
enters the cavity
52
and is held there.
In this embodiment, the film rolls
11
and
21
supported by the above-mentioned supporting unit
40
and the standby supporting unit
50
have a diameter of about 400 mm.
The roll conveying unit
60
has an endless conveying chain
64
(endless belt member) put around a driving-side sprocket
61
(driving-side rotary member) and two follower-side sprockets
62
and
63
(follower-side rotary members).
Two conveying member
66
and
66
are attached at an interval of
180
E to the conveying chain
64
. The conveying member
66
is formed into approximately J shape so as to enable the cavity
66
a
to hold the axial cores
11
a
and
21
a
of the film rolls
11
and
21
.
A driving motor
65
is attached to the rotation shaft of the driving-side sprocket
61
. By the driving force of this driving motor, the driving-side sprocket
61
is rotation-driven counterclockwise in the drawing. The driving force of the driving motor
65
is transmitted to the follower-side sprockets
62
and
63
via the conveying chain
64
to rotate the follower-side sprockets
62
and
63
. This makes it possible for the conveying chain
64
to circumferentially rotate counterclockwise in the drawing.
The track of the conveying chain
64
, i.e., the circumferential movement path of the conveying members
66
and
66
includes a film replacing path
67
a
, a conveying path
67
b
of the axial core
11
b
after film delivery, and a return path
67
c
of the conveying members
66
and
66
. Among others, the film replacing path
67
a
connects the delivery position
10
and the standby position
20
. The path
67
b
for conveying the axial core
11
b
after film delivery connects the delivery position
10
and the starting end of the discharge unit
70
. The return path
67
c
of the conveying members
66
and
66
connects the starting end of the discharge unit
70
and the standby position
20
. These paths
67
a
,
67
b
and
67
c
are formed along the individual sides of a virtual triangle.
Therefore, after delivery of the film
12
from the delivery position
10
, the conveying members
66
receive the remaining core
11
b
after film delivery from the supporting unit
40
by causing circumferential travel of the conveying member
66
. The conveying member
66
conveys the received axial core downward while holding the same in the cavity
66
a
. This permits passage and discharge of the axial core
11
b
to the discharge unit
70
.
The conveying member
66
receives the spare film roll
21
from the standby supporting unit
50
, and conveys the axial core
21
a
thereof, while holding the same in the cavity
66
a
, to the delivery position
10
. As a result, the spare film roll
21
is passed to the delivery supporting unit
40
, and replacing operation of the film rolls
11
and
21
is automatically executed.
After passing the spare film roll
21
to the delivery supporting unit
40
, the conveying members
66
are held in standby at the delivery position
10
.
The cavity
66
a
of the conveying member
66
, upon circumferential travel of the conveying member
66
, is set so that the travel track thereof interferes with the lower bearings
41
a
and
41
b
provided on the delivery supporting unit
40
. Therefore, the film roll
21
is passed to the delivery supporting unit
40
so that the axial core
21
a
rides over bearings
41
a
and
41
b.
In the state in which the conveying member
66
is in standby on the delivery supporting unit
40
, a gap is formed between the cavity
66
a
and the axial core
11
a
of the delivery film roll
11
, thus avoiding mutual contact. Therefore, even when the axial core
11
a
rotates upon film delivery, the axial core
11
a
and the cavity
66
a
never mutually wear.
The individual travel paths
67
a
to
67
c
of the conveying member
66
are set so as to have a short distance between them by bringing the individual sprockets
61
to
63
closer to each other, or bringing the delivery position
10
closer to the standby position
20
. This reduces the size of the film connecting/feeding apparatus
1
. For example, for the film replacing path
67
a
, a distance of about 410 mm is set. When the film rolls
11
and
21
having a diameter of 400 mm are held at the delivery position
10
and the standby position
20
, as described above, the interval between the film rolls
11
and
21
would be about 10 mm.
A maintenance request button
68
is provided on the apparatus main body
2
. By continuously pressing this maintenance request button
68
, it is possible to cause rotation of the driving motor
65
clockwise to achieve circumferential travel of the conveying member
66
in the same direction. As a result, at an emergency or during maintenance, it is possible to easily collect the same from the front side by conveying the delivery film roll
11
from the delivery position
10
to the standby position
20
.
Two conveying members
66
are attached to the conveying chain
64
in this embodiment, but only a single conveying member
66
may be attached.
The discharge unit
70
has a pair of discharge rails (discharge paths)
71
on both sides. The discharge rails
71
extend to the front side of the apparatus main body
2
, and the terminal end thereof is arranged at the discharge position
70
a
. The discharge position
70
a
is set at a height allowing the operator to take out the axial core
116
by only slightly bending down.
The discharge rail
71
is formed with a slight downward inclination from the starting end toward the terminal end. When the axial core
11
b
after film delivery is passed from the roll conveying unit
60
to the discharge rail
71
, therefore, the axial core
11
b
moves under gravity while rolling on the discharge rail
71
, and is discharged to the discharge position
70
a
at the terminal end.
Projections
72
are provided on the terminal end portions of these discharge rails
71
and
71
so that the discharged axial core
11
b
is certainly held at the discharge position
70
a.
[Configuration of Holding Unit and Connecting Unit]
The configuration of the holding unit
80
and the connecting unit
90
will now be described with reference to
FIGS. 4
to
6
.
The holding unit
80
has an operating board
81
attached to the top of the apparatus main body
2
so as to be opened and closed. In the closed state, the inner surface of the operating board
81
(hereinafter referred to as “operating surface
82
”) is arranged at the aforementioned connecting position
30
.
The operating board
81
is made mainly of a transparent material such as an acryl plate. At the connecting position
30
, the delivery film
12
and the spare film
22
are heat-sealed. The portion of the operating board
81
corresponding to the connecting position
30
is made of a heat-resistant material such as a Teflon sheet or silicone rubber.
A holding member
83
is provided on the portion corresponding to the connecting position
30
of the operating surface
82
of the operating board
81
. The holding member
83
has a function of holding the leading end
22
a
of the film
22
delivered from the standby position
30
at the connecting position
30
.
The holding member
83
has a pressing plate
83
b
extending from the lower end of the base
83
a
along the operating surface
82
. The pressing plate
83
b
has a free leading end. The pressing plate
83
b
is therefore flexible around the base.
The pressing plate
83
b
is formed with an upward inclination from the base toward the leading end which is bent downward. An opening
83
c
formed between the leading end and the operating surface
82
of the operating board
81
serves as an insertion port into which the leading end
22
a
of the film
22
can be inserted.
A pair of side end positioning members
84
and
84
are arranged at two places in the delivery direction of the film
22
on the operating surface
82
of the operating board
81
. These side end positioning members
84
are formed into a sheet shape, and guide the side edge of the film
22
along the inner ends thereof.
The side end positioning member
84
is connected to a supporting member
84
a
. The supporting member
84
a
is movable along a long groove
84
b
extending to sides of the operating board
81
.
The side end positioning member
84
is therefore movable sideways and can flexibly cope with a change in position of both sides of the film
22
or a change in the width. The side end positioning member
84
and the supporting member
84
a
are coupled via a screw
84
c
. It is possible to hold the operating board
81
between the side end positioning member
84
and the head
84
d
of the supporting member
84
a
by tightening the screw
84
c
through rotation of the supporting member
84
a
. The side end positioning member
84
is thus secured.
The side end positioning member
84
provided to the left in front has a trailing end
84
e
positioned at a registration mark aligning position for aligning the position of a registration mark
22
b
affixed to the film
22
.
A slit
85
extending sidewise is formed on the front side with a distance from the trailing end
84
e
of the side end positioning member
84
. This slit
85
serves as a leading end aligning position for positioning the leading end
22
a
when holding the leading end
22
a
of the film
22
.
A plurality of suction holes
86
are provided on the operating surface
82
of the operating board
81
. These suction holes
86
communicate with a suction pump not shown through a vacuum chamber
86
a
provided in the operating board
81
. It is therefore possible to apply suction force of the suction pump to the suction holes
86
, and consequently, hold by suction the sheet surface of the film
22
.
As shown in an enlarged view in
FIG. 2B
, a film guiding pin
88
and a coil spring
89
in pair are provided under an opening/closing center shaft of the operating board
81
. In the closed state of the operating board
81
, guiding from the film roll
21
to the operating surface
82
is accomplished by holding the film
22
between the film guiding pin
88
and the coil spring
89
.
In the opened state, the operating board
81
is formed so that the operating surface
82
is directed upward, and the operating surface
82
is arranged at the operating position
80
a
set on the top of the front of the apparatus main body
2
(see FIG.
2
A). The operating surface
82
arranged at the operating position
80
a
is set at a height permitting operation by the operator in an upright posture while looking down the object.
In the open state of the operating board
81
, the operating surface
82
is set by aligning in the height direction with the feeding position
50
a
of the above-mentioned spare film roll and the discharge position
70
a
of the axial core
11
b
after film delivery. The operator can therefore carry out operations at the same place without moving.
The method for holding the leading end
22
a
of the film
22
delivered from the standby position
20
by means of the holding unit
80
will now be described.
First, in the closed state of the operating board
81
, the side end edge of the film
12
delivered from the delivery position
10
and the inner end of the side end positioning member
84
are positionally aligned (see FIG.
4
). In this case, since the operating board
81
is made of a transparent material, it is easy to confirm the position of the side edges of the film
12
via the operating board
81
even in the closed state.
Then, the operating board
81
is opened toward the front side of the apparatus main body
2
so that the operating surface
82
is directed upward (see FIG.
2
A). The film
22
is delivered from the standby position
20
, and the registration mark
22
b
affixed to the film
22
is aligned with the trailing end
84
e
of the side end positioning member
84
.
Then, the film
22
is cut with reference to the slit
85
provided on the operating board
81
by use of a cutting tool such as a cutter to position the leading end
22
a
of the film
22
at the slit
85
. This makes it possible to keep the leading end
22
a
of the film
22
always at a certain position relative to the registration mark
22
b.
The leading end
22
a
of the film is folded, and the folded portion is inserted through an opening
83
c
of the holding member
83
by means of an inserting jig
80
b
(see FIG.
6
). By inserting the leading end
22
a
of the film
22
as described above, the folding reaction of the leading end
22
a
of the film
22
makes it possible to elastically hold in the holding member
83
.
When inserting the leading end
22
a
into the holding member
83
, insertion should be accomplished so that the folded portion comes into contact with the base
83
a
of the holding member
83
. As a result of such insertion, it is possible to keep a constant film length from the registration mark
22
b
of the film
22
to the connecting position
30
.
Since the pressing plate
83
b
of the holding member
83
is formed so as to be deflected around the base, it is possible to easily cause deflection of the pressing plate
83
b
when inserting the leading end
22
a
. It is therefore possible to easily insert the leading end
22
a
of the film
22
into the holding member
83
because the distance between the pressing plate
83
b
and the operating surface
82
of the operating board
81
becomes larger.
Then, after holding the film
22
between the film guiding pin
88
and the coil spring
89
, the operating board
81
is closed (see FIG.
2
A). In this closed state, the film
22
is held between the film guiding pin
88
and the coil spring
89
. In addition, because the film is sucked by the suction holes
86
provided on the operating surface
82
of the operating board
81
, the film
22
never sags, and the film
22
can be certainly held on the operating surface
82
(see FIG.
5
).
The configuration of the connecting unit
90
will now be described in detail.
The connecting unit
90
has a guiding plate
91
and a heater block
92
and has a configuration in which a film
12
delivered from the delivery position
10
on the upper surface side of the guiding plate
91
is guided to the heater block
92
.
The heater block
92
is arranged below the connecting position
30
. A heating surface
92
a
is formed on the upper surface side opposite to the holding unit
80
of the heater block
92
. An electric heater is built in the heater block
92
, and temperature of the heating surface
92
a
can be set at a prescribed value by controlling output of the electric heater.
The heater block
92
is attached to an air cylinder not shown, and vertically movable by the driving force of the air cylinder. By moving the heater block
92
upward by driving the air cylinder, therefore, it is possible to hold the film
12
delivered from the delivery position
10
and the leading end
22
a
of the film delivered from the standby position
20
with the operating board
81
for heat sealing.
The air cylinder communicates with a compressed air source not shown via a solenoid valve. By opening and closing the solenoid valve, compressed air is supplied for driving.
[Control System of Film Connecting/Feeding Apparatus]
The control system of the film connecting/feeding apparatus will now be described with reference to
FIGS.7
,
8
A and
8
B.
As shown in
FIGS. 7
,
8
A and
8
B, the control system
100
of the film connecting/feeding apparatus comprises a film connecting operation control section
101
, a sealing operation control section
102
, and a film roll replacing operation control section
103
.
A terminal end detecting signal of the film
12
transmitted from a terminal end detecting sensor
6
, a registration mark detecting signal to the film
12
transmitted from a registration mark sensor
104
provided on the delivery path of the film
12
, and a revolutions detecting signal transmitted from an encoder
105
detecting the amount of rotation of the delivery motor
5
are entered into the film connecting operation control section
101
.
The wrapping length of the film as set by a touch panel
106
is entered into the film connecting operation control section
101
which serves as storage means storing the wrapping length.
The film connecting operation control section
101
has various functions for aligning the heat sealing position set at the terminal end of the film
12
on the basis of these input data with the connecting position
30
.
The film connecting operation control section
101
has a function of calculating the amount of delivery of the film
21
for aligning the heat sealing position of the film
12
with the connecting position
30
on the basis of the wrapping length d, the distance L between the terminal end detecting position and the connecting position
30
of the delivery film
12
previously set in the operation control section
101
, the distance X between the registration mark sensor
104
and the connecting position
30
, and the film length S from the registration mark aligning position to the connecting position
30
for the film
22
.
A typical method for calculating the delivery amount will be described on the basis of the following formulae (1) to (7). First, by use of Formula (1), the number n of wrapping bags to be formed by the film included between the registration mark sensor
104
and the connecting position
30
is calculated. The difference ΔP between the position of the registration mark
12
a
of the film
12
and the registration mark aligning position upon detecting the registration mark is calculated in accordance with Formula (2), on the basis of the proposed number n of formed wrapping bags, the wrapping length d, the distance X between the registration mark sensor
104
and the connecting position
30
, and the film length S between the registration mark aligning position in the film
22
and the connecting position
30
.
Then, by use of Formula (3), the proposed number m of wrapping bags from the registration mark aligning position to the terminal end of the film
12
is calculated. Then, the length β from the final registration mark
12
a
to the terminal end of the film
12
is calculated on the basis of the amount of delivery y of the film
12
during a period from detection of the terminal end of the film
12
to detection of the first registration mark
12
a
and the like in accordance with Formulae (4) and (5).
For the case where there is a step of pattern aligning (with reference to registration marks), the amount of delivery P
1
or P
1
a
of the film
12
is calculated using the thus calculated values, in accordance with Formula (6) or (6a).
When there is no step of pattern alignment (relative to the film terminal end), the delivery amount P
2
of the film
12
is calculated by use of Formula (7).
n
=(
X+S
)/
d
(counting fractions as one) (1)
Δ
P=nd
−(
X+S
) (2)
m
=(
L−S
)/
d
(counting fractions as zero) (3)
(
X+L−y
)/
d=N
(counting fractions as zero) (4)
X+L−y−Nd=β
(5)
P
1
=
md+ΔP
(where,
d−S+a
>β) (6)
P
1
a
=(
m
+1)
d+ΔP
(where,
d−S+a
<β or
d−S+a
=β) (6a)
P
2
=
L−a
(7)
where,
X: distance between the registration mark sensor
104
and the connecting position
30
;
S: film length from registration mark aligning position in film
22
to connecting position
30
;
n: proposed number of formed bags from registration mark sensor
104
to connecting position
30
;
d: wrapping length;
m: proposed number of formed bags from registration mark aligning position to terminal end detecting position;
L: distance between terminal end detecting position of delivery film
12
and connecting position
30
;
y: delivery amount of film
12
during period from detection of terminal end of film
12
to detection of first registration mark
12
a;
N: proposed number of formed bags from registration mark sensor
104
to terminal end detecting position;
β: length from final registration mark
12
a
to terminal end of film;
a: constant (length from heat-sealing position of film
12
to film terminal end);
P
1
: delivery amount of film
12
relative to registration mark when d−S+a>β;
P
1
a
: delivery amount of film
12
relative to registration mark when d−S+a<β or d−S+a=β;
P
2
: delivery amount of film
12
with reference to film terminal end.
A film connecting operation control section
101
a control signal of the delivery roller
4
to the delivery motor
5
on the basis of these calculated values, outputs this control signal to the delivery motor
5
, and conducts connecting position aligning operation. In this connecting position aligning operation, an operating program of the delivery motor
5
is incorporated in advance in the film connecting operation control section
101
so that the delivery motor
5
operates at a low speed when heat-sealed portion of the film
12
reaches a certain position relative to the connecting position
30
.
The sealing operation control section
102
has a function of performing sealing operation by issuing control signals to the solenoid valve
108
of the heater block
92
for a certain period of time, on the basis of input signals of the sealing time set by a touch panel
106
and signals transmitted from a timer
107
counting this sealing period.
The sealing operation control section
102
has a function of setting a certain temperature for the heating surface
92
a
of the heater block
92
by issuing control signals to the electric heater of the heater block
92
, on the basis of input signals of the sealing temperature set on the touch panel
106
.
A detecting signal of the axial core
11
a
of the film roll
11
transmitted from the delivery position sensor
109
provided near the delivery position
10
, a detecting signal of the axial core
21
a
of the film roll
21
transmitted from the standby position sensor
110
provided near the standby position
20
, and a signal issued by pressing the maintenance request button
68
are entered into the film roll replacing operation control section
103
.
The film roll replacing operation control section
103
has a function of generating control signals to the driving motor
65
of the driving-side sprocket
61
on the basis of these input signals, issuing these control signals to the driving motor
65
, and performing film replacing operation and the like.
The film roll replacing operation control section
103
has a function of issuing control signals to the solenoid valve
111
driving the air cylinder
42
of the delivery supporting unit
40
provided at the delivery position
10
.
Then, the individual control operations by the control system
100
of the film connecting/feeding apparatus will be described with reference to
FIGS. 9
to
16
.
Upon confirmation of detection of the terminal end position of the film
12
on the basis of the signal from the terminal end detecting sensor
6
(S
1
), the film connecting operation control section
101
starts counting of the amount of rotation of the delivery motor
5
, on the basis of a signal from the encoder
105
(S
2
).
Then, when conducting pattern alignment with reference to the position of the registration mark
12
a
affixed to the film
12
(S
3
), upon confirmation of detection of the registration mark
12
a
of the film
12
on the basis of a signal from the registration mark sensor
104
, the film connecting operation control section
101
calculates the delivery amount of the film
12
relative to the registration mark
2
a
(S
5
), upon confirmation of detection of the registration mark
12
a
of the film
12
(S
4
).
Upon confirming that the heat-sealed position reaches a certain position relative to the connecting position
30
with reference to the registration mark (S
6
), the film connecting operation control section
101
issues an operating instruction to the delivery motor
5
to switch over the rotational speed of the delivery motor
5
to a low speed (S
7
).
Then, upon confirming that the heat-sealed position reaches the connecting position
30
(S
8
) on the basis of a signal from the encoder
105
, the film connecting operation control section
101
issues a stop instruction to the delivery motor
5
to stop the delivery motor
5
(S
9
), thus completing the film connecting positioning operation relative to the registration mark.
When carrying out film connection positioning operation with reference to the terminal end of the film
12
, the film connecting operation control section
101
calculates the delivery amount of the film
12
with reference to the film terminal end (S
10
).
Upon confirming that the heat-sealed position based on the film terminal end reaches a certain position relative to the connecting position
30
(S
11
), the film connecting operation control section
101
issues an operating instruction to the delivery motor
5
to switch over the rotation speed of the delivery motor
5
to a low speed (S
7
), and continues to perform similarly the film connection positioning operations.
Then, upon confirming that the film connection positioning operation by the film connecting operation control section
101
(S
20
), the sealing operation control section
102
issues an operating instruction to the solenoid valve
108
of the heater block
92
to open the solenoid value
108
, moves the heater block
92
upward, and performs sealing operation (S
21
).
Then, upon confirming that a set sealing time has elapsed on the basis of a signal from the timer
107
(S
22
), the sealing operation control section
102
issues an operating instruction to the solenoid valve
108
to close the solenoid valve
108
, moves the heater block
92
downward, and completes the sealing operations (S
23
).
The sealing operation control section
102
issues an operating instruction to the delivery motor
5
to start up the delivery motor
5
(S
24
), and resumes delivery of the film
12
by means of the delivery roller
4
.
The folded portion formed by folding the leading end
22
a
of the film
22
is elastically held in the holding member
83
in this embodiment. When delivering after film connection, therefore, the leading end
22
a
of the film
22
easily comes off the holding member
83
, thus permitting prevention of occurrence of a positional shift of the connected films.
Then, upon confirming that the sealing operation by the sealing operation control section
102
is completed (S
30
), the film roll replacing operation control section
103
issues an operating instruction to the solenoid valve
111
of the air cylinder
42
provided in the delivery supporting unit
40
to close the solenoid valve
111
, moves upward the air cylinder
42
, i.e., the upper bearings
41
c
and
41
d
, and releases the holding state of the axial core after delivery of the film by the bearings
41
a
to
41
d
of the delivery supporting unit
40
(S
31
).
Then, upon confirming that there is an axial core
21
a
of the spare film roll
21
at the standby position
20
on the basis of a signal from the standby position sensor
110
(S
32
), the film roll replacing operation control section
103
issues an operating instruction to the driving motor
65
of the driving-side sprocket
61
to drive the driving motor
65
counterclockwise in the drawing (S
33
), moves the conveying member
66
from the delivery position
10
, and conveys the axial core
11
a
having delivered the film to the discharge unit
70
.
The conveying member
66
present on the 180E-opposite side receives the axial core
21
a
of the spare film roll
21
from the standby position
20
, and conveys this film roll
21
to the delivery position
10
(see FIG.
14
).
Then, upon confirming that the axial core
21
a
of the spare film roll
21
reaches the delivery position
10
from a signal from the delivery position sensor
109
(S
34
), the film roll replacing operation control section
103
issues a stop signal to the driving motor
65
to stop the driving motor
65
(S
35
; FIG.
15
).
The film roll replacing operation control section
103
issues an operating instruction to the solenoid valve
111
of the delivery supporting unit
40
to release the solenoid valve
111
, and moves the upper bearings
41
c
and
41
d
downward to hold the axial core
21
a
of the film roll
21
between the upper and lower bearings
41
a
to
41
d
(S
36
), thus completing the film roll replacing operation.
Upon confirming that the maintenance request button
68
provided on the apparatus main body
2
of the film connecting/feeding apparatus
1
is pressed down (S
40
), the film roll replacing operation control section
103
issues an operating instruction to the driving motor
65
of the driving-side sprocket
61
while the maintenance request button
68
is pressed down, to cause clockwise rotation of the driving motor
65
(S
41
), and conveys the film roll
111
at the delivery position
10
to the standby position
20
.
Upon confirming that the axial core
11
a
of the film roll
11
reaches the standby position on the basis of a signal from the standby position sensor
110
(S
42
), the film roll replacing operation control section
103
issues a stop instruction to the driving motor to stop the driving motor
65
(S
43
; see FIG.
16
).
According to the present invention, as described above, there are provided delivery supporting means and standby supporting means supporting the film roll at the delivery position and the standby position, respectively. It is not therefore necessary to impart a function for supporting the film roll to the roll conveying means accounting for an important weight in the apparatus parts cost. It is therefore possible to simplify configuration of the roll conveying means, thus permitting reduction of the manufacturing cost for the apparatus as a whole.
Furthermore, the roll conveying means comprises an endless belt member put around a rotary member and a conveying member is attached to this endless belt member. It is therefore possible to cause rotation of the rotary member with a single driving source and to achieve circumferential travel of the conveying member under the effect of the rotational driving force thereof. It is not therefore necessary to provide a plurality of driving sources, thus reducing the number of driving sources and permitting reduction of the apparatus cost also in this respect.
In addition, the folded portion formed by folding the leading end of the film delivered from the standby position is held by inserting into the holding member. Upon delivery after film connection, therefore, the leading end of the film easily comes off the holding member, thus preventing occurrence of a positional shift of the film.
Claims
- 1. A film connecting/feeding apparatus defining a delivery position where a delivery film roll is held; a standby position where a spare film roll is held; and a connecting position where a leading end of a film delivered from said spare film roll is held and said leading end and a film delivered from said delivery position are connected; comprising:delivery supporting means arranged at said delivery position for rotatably supporting an axial core of a delivery film roll, standby supporting means arranged at said standby position for supporting an axial core of the spare film roll, said standby supporting means being separate from said delivery supporting means; a rotary member; an endless belt member arranged to run around said rotary member, and roll conveying means for holding the axial core of the film roll, said roll conveying means comprising a conveying member attached to said endless belt member, wherein said roll conveying member is arranged to receive a spare film roll from said standby supporting means, remove said spare film roll from said standby supporting means, convey said spare film roll to said delivery position, and pass said spare film roll to said delivery supporting means at said delivery position upon movement of said endless belt member.
- 2. A film connecting/feeding apparatus according to claim 1, further comprising:a discharge path for discharging the axial core after having delivered the film; wherein the conveying member of said roll conveying means further receives an axial core after having delivered the film, from said delivery supporting means and conveys the axial core to said discharge path.
- 3. A film connecting/feeding apparatus according to claim 1, further comprising:a main body; an operating board attached to said main body so as to be opened and closed; a holding member which holds an inserted folded portion formed by folding the leading end of the film delivered from said standby position, with a side of said operating board as an operating surface is attached to said operating surface; and in the closed state of said operating board, said holding member is positioned at said connecting position.
- 4. A film connecting/feeding apparatus according to claim 3, wherein an operating position for carrying out an operation of folding the leading end of the film delivered from said standby position and causing the holding member to hold the folded position is defined on a front side of said main body; andsaid operating board is arranged so that, in the opened state, said operating surface is placed upward at said operating position.
- 5. A film connecting/feeding apparatus according to claim 4, further comprising a discharge path for discharging the axial core after having delivered the film, wherein a feeding position at which the film roll is fed to said standby position, a discharge position defined at a terminal end of said discharge path, and said operating position are arranged in the height direction on the front side of said main body.
- 6. A film connecting/feeding apparatus according to claim 3, wherein an edge positioning section which guides edges on both sides of the film delivered from said standby position is formed on said operating surface of said operating board.
- 7. A film connecting/feeding apparatus according to claim 3, wherein said operating board is made of a transparent material.
- 8. A film connecting/feeding apparatus according to claim 1, further comprising:end detecting means for detecting an end of the film delivered from said delivery position at a prescribed detecting position; and connecting position aligning means for delivering an end portion of the film of which the end has been detected by said end detecting means to said connecting position based on a distance between said detecting position and said connecting position.
- 9. A film connecting/feeding apparatus according to claim 8, further comprising:registration mark detecting means for detecting a registration mark attached to the film delivered from said delivery position at a prescribed position; wrapping length storing means for storing a wrapping length set on the film delivered from said delivery position; and registration mark aligning means for aligning a registration mark position of a film of which the end has been detected by said end detecting means and of which the registration mark has been detected by said registration mark detecting means with the registration mark position of a film of which the leading end portion has been held at said connecting position, on the basis of a wrapping length stored in said wrapping length storing means and a distance between said registration mark detecting position and the connecting position.
- 10. A film connecting/feeding apparatus according to claim 1, wherein said delivery supporting means comprise a plurality of bearings arranged to support the axial core of the delivery film roll, said conveying means being arranged to transfer the axial core of the spare film roll from said conveying member onto said bearings.
- 11. A film connecting/feeding apparatus according to claim 10, wherein said conveying member is arranged relative to said bearings such that after said conveying member transfers the axial core of the spare film roll onto said bearings, said conveying member is held in a standby position at said delivery position in which said conveying member is not in contact with said axial core.
- 12. A film connecting/feeding apparatus according to claim 1, further comprising a main body, said delivery supporting means comprising a plurality of bearings connected to said main body and said standby supporting means comprising a pair of feeding rails extending on a front side of said main body.
- 13. A film connecting/feeding apparatus defining a delivery position where a delivery film roll is held, a standby position where a spare film roll is held and a connecting position where a leading end of a film delivered from the spare film roll is held and the leading end and a film delivered from the delivery position are connected; comprising:delivery supporting means arranged at the delivery position for rotatably supporting an axial core of the delivery film roll; standby supporting means arranged at the standby position for supporting an axial core of the spare film roll; a rotary member; an endless belt member arranged to run around said rotary member; roll conveying means for holding the axial core of the film roll said roll conveying means comprising a conveying member attached to said endless belt member and arranged to receive a spare film roll from said standby supporting means, convey said spare film roll to the delivery position, and pass said spare film roll to said delivery supporting means; a main body; an operating board attached to said main body so as to be opened and closed; and a holding member which holds an inserted folded portion formed by folding the leading end of the film delivered from said standby position, with a side of said operating board as an operating surface being attached to said operating surface, and in the closed state of said operating board, said holding member being positioned at said connecting position.
- 14. A film connecting/feeding apparatus according to claim 13, wherein an operating position for carrying out an operation of folding the leading end of the film delivered from the standby position and causing the holding member to hold the folded position is defined on a front side of said main body; andsaid operating board is arranged so that, in the opened state, said operating surface is placed upward at said operating position.
- 15. A film connecting/feeding apparatus according to claim 14, further comprising a discharge path for discharging the axial core after having delivered the film, wherein a feeding position at which the film roll is fed to the standby position, a discharge position defined at a terminal end of said discharge path, and said operating position are arranged in the height direction on the front side of said main body.
- 16. A film connecting/feeding apparatus according to claim 13, wherein an edge positioning section which guides edges on both sides of the film delivered from the standby position is formed on said operating surface of said operating board.
- 17. A film connecting/feeding apparatus according to claim 13, wherein said operating board is made of a transparent material.
- 18. A film connecting/feeding apparatus including delivery position where a delivery film roll is held, a standby position where a spare film roll is held and a connecting position where a leading end of a film delivered from the spare film roll is held and the leading end and a film delivered from the delivery position are connected; comprising:delivery supporting means arranged at the delivery position for rotatably supporting an axial core of the delivery film roll; standby supporting means arranged at the standby position for supporting an axial core of the spare film roll; a rotary member; an endless belt member arranged to run around said rotary member; roll conveying means for holding the axial core of the film roll, said roll conveying means comprising a conveying member attached to said endless belt member and arranged to receive the spare film roll from said standby supporting means, convey the spare film roll to the delivery position, and pass the spare film roll to said delivery supporting means; end detecting means for detecting an end of the film delivered from the delivery position at a prescribed detecting position; and connecting position aligning means for delivering an end portion of the film of which the end has been detected by said end detecting means to the connecting position based on a distance between the detecting position and the connecting position.
- 19. A film connecting/feeding apparatus according to claim 18, further comprising:registration mark detecting means for detecting a registration mark attached to the film delivered from the delivery position at a prescribed position; wrapping length storing means for storing a wrapping length set on the film delivered from the delivery position; and registration mark aligning means for aligning a registration mark position of a film of which the end has been detected by said end detecting means and of which the registration mark has been detected by said registration mark detecting means with the registration mark position of a film of which the leading end portion has been held at the connecting position, on the basis of a wrapping length stored in said wrapping length storing means and a distance between said registration mark detecting position and the connecting position.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2001-113901 |
Apr 2001 |
JP |
|
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