Information
-
Patent Grant
-
6435090
-
Patent Number
6,435,090
-
Date Filed
Tuesday, September 14, 199925 years ago
-
Date Issued
Tuesday, August 20, 200222 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
- Blakely Sokoloff & Taylor & Zafman
-
CPC
-
US Classifications
Field of Search
US
- 101 4071
- 414 7908
- 271 218
- 271 219
- 271 214
-
International Classifications
- B65H3132
- B65H3100
- B41F1354
- B41F1364
- B41F1370
-
Abstract
A sheet receiving apparatus in a sheet-fed rotary printing press includes at least one paper receiving bar, an air cylinder, and a moving plate. The paper receiving bar is inserted in a dropping path for a sheet-like printing product to temporarily stop it after printing. The air cylinder moves the paper receiving bar between a wait position and a sheet receiving position. The moving plate supports the paper receiving bar to be movable in a widthwise direction of the printing product.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a sheet receiving apparatus in a sheet-fed rotary printing press which temporarily receives a sheet as a printing sample from sheets that are printed, conveyed, and delivered onto a pile board.
In a sheet-fed rotary printing press, a sheet printed by a printing unit is gripped and conveyed by the grippers of delivery chains, is released at a convey terminal end, and is dropped onto a pile board and stacked there. In this printing operation, the operator checks from time to time if the density of the ink and water of the delivered printing product is appropriate so defective printing is not performed.
In the conventional checking method, as shown in Japanese Patent Laid-Open No. 63-87469, a plurality of rod-like sheet receiving members are horizontally and quickly moved forward and backward to and from a delivery sheet dropping path to receive a dropping printing product, thereby temporarily stopping the operation of stacking the printing product onto a pile board. While the printing product stacking operation is temporarily stopped, the operator extracts one to three printing products stacked at the top of the pile board and compares them with a regular printing sample.
With a double-sided simultaneous printing product, when the sheet receiver is temporarily moved forward under the lower surface of the printing product to receive it, the lower surface of the printing product where the ink is not dried is brought into slidable contact with the sheet receiver. Therefore, the lower surface of the printing product is soiled by rubbing off of the ink to produce a defective printing product. Then, the defective printing product must be removed from the stacked printing products, which is cumbersome.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a sheet receiving apparatus in a sheet-fed rotary printing press in which occurrence of a defective printing product is prevented.
It is another object of the present invention to provide a sheet receiving apparatus in a sheet-fed rotary printing press in which the operation of removing a defective printing product is not necessary.
In order to achieve the above objects, according to the present invention, there is provided a sheet receiving apparatus in a sheet-fed rotary printing press, comprising at least one sheet receiving member inserted in a dropping path for a sheet-like printing product to temporarily stop the printing product after printing, drive means for moving the sheet receiving member between a wait position and a sheet receiving position, and a support mechanism for supporting the sheet receiving member to be movable in a widthwise direction of the printing product.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1A
is a plan view of a sheet receiving apparatus in a sheet-fed rotary printing press according to the first embodiment of the present invention, and
FIG. 1B
is a front view of a moving plate shown in
FIG. 1A
;
FIG. 2
is a rear view of the sheet receiving apparatus shown in
FIG. 1A
;
FIG. 3
is an enlarged sectional view taken along the line III—III of
FIG. 1A
;
FIG. 4A
is a sectional view showing covers and a guide plate fixed to each other, and
FIG. 4B
is an enlarged plan view of the guide plate shown in
FIG. 4A
;
FIG. 5A
is an enlarged plan view of a sheet receiving bar mounting portion shown in
FIG. 1A
, and
FIG. 5B
is a sectional view taken along the line I—I of
FIG. 5A
;
FIGS. 6A
,
6
B, and
6
C are views for explaining the position of the sheet receiving bar with respect to one printing product in four-surface printing, two-surface printing, and three-surface printing, respectively; and
FIG. 7
is a perspective view of a moving plate showing the mounting portions of sheet receiving bars according to the second embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will be described in detail with reference to the accompanying drawings.
FIG. 1A
shows a sheet receiving apparatus in a sheet-fed rotary printing press according to an embodiment of the present invention. Referring to
FIG. 1A
, a stay
4
horizontally extends between a pair of frames
2
and
3
provided to be separate from each other by a predetermined distance. A pair of prismatic supports
5
are attached to the two ends of the stay
4
with bolts
6
to extend in a direction B opposite to a delivery direction A of a printing product.
Flat plate-like covers
7
a
,
7
b
, and
7
c
, which are substantially rectangular when seen from the top, are arranged in series between the frames
2
and
3
. One end of each of the covers
7
a
and
7
c
is fixed to the corresponding support
5
through bolts
8
. Other-end portions of the covers
7
a
and
7
c
are connected to the two ends of the cover
7
b
through a pair of guide plates
20
fixed to the stay
4
. As shown in
FIG. 4B
, a guide groove
23
which is open in the delivery direction A of the printing product is formed at the central portion of each guide plate
20
. A plurality of holes
20
a
and
20
b
are formed in two rows on two sides of the guide plate
20
along the guide groove
23
. The covers
7
a
and
7
c
, and
7
b
are fixed to the guide plates
20
with bolts
102
extending through the holes
20
b.
Each guide plate
20
is attached to the stay
4
with bolts
101
extending through the holes
20
a
such that its one side extending in the counter convey direction (direction indicated by an arrow B) of the printing product is inclined downward. The cover
7
b
is formed with a pair of wide notches
10
and a narrow notch
11
to be parallel to the guide groove
23
. The notch
11
is formed at the center of the cover
7
b
between the notches
10
. The notches
10
open in the counter delivery direction B of the printing product, in the same manner as the opening of the guide grooves
23
.
A lay shaft
12
is pivotally supported by supports
13
fixed to the frames
2
and
3
. As shown in
FIG. 2
, a plurality of paper lays
14
are fixed to the lay shaft
12
at their proximal ends by split fastening. The lay shaft
12
is driven by an air cylinder (not shown) to pivot such that the paper lays
14
take an upright state indicated by a solid line and a laid state indicated by an alternate long and two short dashed line in FIG.
3
. Referring to
FIG. 3
, a pair of right and left delivery chains (one delivery chain is not shown)
16
travel in a direction of an arrow A. Gripper bars (not shown) extend between the pair of delivery chains
16
at a predetermined pitch. Each gripper bar is provided with a gripper unit composed of a gripper and a gripper pad.
The delivery unit having the above arrangement is disclosed in U.S. Pat. No. 5,797,321.
As the delivery chains
16
travel, a printing product printed by the printing press is conveyed in the direction of arrow A in
FIG. 3
as it is gripped by the gripper units. At the convey terminal end, the printing product is released from the gripper units and dropped onto a delivery plate board
17
to be stacked on it. The printing products stacked on the delivery plate board
17
are aligned in the vertical direction by abutting their leading ends against the paper lays
14
. A guide
18
guides insertion of the delivery plate board
17
. Lay hooks
19
prevent the printing product stacked on the delivery plate board
17
from dropping from the delivery plate board
17
.
As shown in
FIG. 1A
, a pair of air cylinders
25
are attached to the lower surfaces of the guide plates
20
, provided between the covers
7
a
and
7
c
, and the cover
7
b
, through brackets
26
with bolts
27
. A moving element
29
to engage with the guide groove
23
is attached to the distal end of a rod
28
of each air cylinder
25
.
The two ends of an elongated moving plate
30
are attached to the moving elements
29
with bolts
31
to extend between the moving elements
29
. As shown in
FIG. 1B
, the two ends of the moving plate
30
are bent in a crank manner. The moving plate
30
is formed with a pair of elongated holes
32
and an elongated hole
33
shorter than the elongated holes
32
. The elongated holes
32
extend in a direction (a direction of arrows C-D) perpendicular to the convey direction of the printing product to match the width of the notches
10
. The elongated hole
33
matches the width of the notch
11
. Round rod-like paper receiving bars
35
a
,
35
b
, and
35
c
are supported by the moving plate
30
. Proximal ends
36
of the paper receiving bars
35
a
,
35
b
, and
35
c
movably engage with the elongated holes
32
and
33
.
As shown in
FIG. 5C
, the proximal ends
36
of the paper receiving bars
35
a
,
35
b
, and
35
c
are cylindrical. The upper end of each proximal end
36
forms a projection
37
which is oval when seen from the top. The projection
37
has a width slightly smaller than a width L of the elongated holes
32
and
33
and a height slightly smaller than the thickness of the moving plate
30
. A screw hole
38
is formed at the center of the projection
37
, as shown in FIG.
5
A. As shown in
FIG. 5B
, a knob
40
has an abutting portion
41
formed at its lower portion and having substantially the same diameter as that of the proximal end
36
. A screw
42
integrally projects from the lower end of the abutting portion
41
.
With the paper receiving bars
35
a
,
35
b
, and
35
c
having the above arrangement, the projections
37
of the proximal ends
36
of the paper receiving bars
35
a
,
35
b
, and
35
c
engage in the elongated holes
32
and
33
of the moving plate
30
. The screws
42
of the knobs
40
are threadably engaged in the screw holes
38
of the corresponding proximal ends
36
to sandwich the moving plate
30
with the proximal ends
36
and abutting portions
41
. The paper receiving bars
35
a
to
35
c
are attached to the moving plate
30
in this manner. The paper receiving bars
35
a
to
35
c
are mounted at positions corresponding to the non-printing areas in accordance with the paper size and plate making, as will be described later.
The temporary sheet receiving operation of the sheet receiving apparatus in the sheet-fed rotary printing press having the above arrangement will be described.
The pair of air cylinders
25
are actuated synchronously to move the respective rods
28
forward in the direction of the arrow B. The moving elements
29
move in the direction of the arrow B as they are guided by the guide grooves
23
of the guide plates
20
, so that the moving plate
30
also moves in the direction of the arrow B. Since the three paper receiving bars
35
a
also move in the direction of the arrow B, the sheet released from the gripper units of the delivery chains
16
is placed on the three paper receiving bars
35
a
to
35
c
. Simultaneously, another air cylinder (not shown) is actuated to pivot the lay shaft
12
counterclockwise, as shown in FIG.
3
. The paper lays
14
are accordingly set in the laid state indicated by the alternate long and two short dashed line, so the sheet located immediately under the paper receiving bars
35
a
to
35
c
can be extracted from the paper lays
14
as the printing sample.
How the paper receiving bars
35
a
to
35
c
are mounted will be described.
As shown in
FIG. 6A
, when four-surface printing is to be performed for one printing product
50
, four image areas
51
a
to
51
d
are arranged to correspond to four image patterns, and the three paper receiving bars
35
a
to
35
c
are positioned on the printing product
50
to correspond to three non-image areas
52
a
to
52
c
among the image areas
51
a
to
51
d.
As shown in
FIG. 6B
, when two-surface printing is to be performed for one printing product
50
a
, two image areas
53
a
and
53
b
are arranged to correspond to two image patterns, and one paper receiving bar
35
c
is positioned to correspond to one non-image area
54
between the image areas
53
a
and
53
b
. In this case, the paper receiving bars
35
a
and
35
b
are removed from the moving plate
30
by rotating the knobs
40
to disengage their screws
42
from the screw holes
38
.
As shown in
FIG. 6C
, when three-surface printing is to be performed for one printing product
50
b
, three image areas
55
a
to
55
c
are arranged to correspond to three image patterns, and the two paper receiving bars
35
a
and
35
b
are positioned to correspond to two non-image areas
56
a
and
56
b
among the image areas
55
a
to
55
c
. In this case, the paper receiving bar
35
c
is removed from the moving plate
30
in the same manner as described above, and the projections
37
of the proximal ends
36
of the paper receiving bars
35
a
and
35
b
are moved in the widthwise direction (a direction of arrows C-D) of the printing product along the elongated holes
32
by loosening their knobs
40
, thereby positioning the paper receiving bars
35
a
and
35
b
. After that, the knobs
40
are rotated to fasten them, so the paper receiving bars
35
a
and
35
b
are fixed.
In this manner, the paper receiving bars
35
a
to
35
c
can be removed from the moving plate
30
or moved in the widthwise direction of the printing product in accordance with changes in plate making for the images of the printing products
50
,
50
a
, and
50
b
. Therefore, the paper receiving bars
35
a
to
35
c
can be positioned in the non-image areas.
When the paper receiving bars
35
a
to
35
c
are positioned not to be located in the image areas, contamination of the image areas can be prevented, and occurrence of a defective sheet can accordingly be prevented. The operation of removing a defective sheet becomes unnecessary to reduce the load of inspection. The paper receiving bars
35
a
to
35
c
are moved as they are guided along the elongated holes
32
and
33
formed in the moving plate
30
, and are removed by disengaging the screws
42
from the screw holes
38
through rotation of the knobs
40
. Therefore, the number of components does not increase, and the structure is simplified.
In the above embodiment, the paper receiving bars
35
a
to
35
c
are moved or removed to cope with changes in plate making for images. Obviously, the paper receiving bars
35
a
to
35
c
may be moved or removed to cope with a change in paper size or position of the image. Although the paper receiving bars
35
a
to
35
c
are moved forward by the air cylinders
25
in the paper delivery direction A, they may be moved in a direction perpendicular to the convey direction A of the printing product to match the direction along which the non-image areas are aligned.
In the above embodiment, the paper receiving bars
135
a
to
135
c
are moved along the elongated holes
32
of the moving plate
30
. However, the present invention is not limited to this. For example, as shown in
FIG. 7
, a plurality of screw holes
130
b
may be formed in a front end face
130
a
of a thick moving plate
130
in its longitudinal direction, and screws
136
may be formed on the bases of paper receiving bars
135
a
to
135
c
. The paper receiving bars
135
a
to
135
c
can be positioned at arbitrary positions by selectively, threadably engaging the screws
136
with the plurality of screw holes
130
b.
In the above embodiment, three paper receiving bars
135
a
to
135
c
are provided. However, it suffices if at least one paper receiving bar is provided. The covers
7
a
to
7
c
may form one plate. In this case, notches to oppose guide grooves
23
may be formed at positions corresponding to guide plates
20
.
As has been described above, according to the present invention, for example, when plate making for the image of the sheet is to be changed, the paper receiving bars can be moved in the widthwise direction of the printing product or can be removed to correspond to the non-image areas. The image areas will not be soiled, and occurrence of a defective sheet can be prevented. The operation of removing a defective sheet becomes unnecessary to reduce the load of inspection. Furthermore, the number of components does not increase, and the structure is simplified.
Claims
- 1. A sheet receiving apparatus in a sheet-fed rotary printing press, comprising:at least one sheet receiving member inserted in a dropping path for a sheet-like printing product to temporarily stop the printing product after printing; drive means for moving said sheet receiving member in a first direction between a wait position and a sheet receiving position; and a support mechanism for supporting said sheet receiving member after moving said sheet receiving member in a second direction substantially perpendicular to and in a same substantially horizontal plane as the first direction.
- 2. An apparatus according to claim 1, wherein said sheet receiving member is detachably supported by said support mechanism.
- 3. An apparatus according to claim 1, wherein said support mechanism comprises:an elongated member extending in the second direction of the printing product, an elongated hole formed to extend through said elongated member to extend in the second direction of the printing product, and a fixing member for fixing one end of said sheet receiving member movably engaging with said elongated hole to said elongated member.
- 4. An apparatus according to claim 1, wherein said support mechanism comprises:an elongated member extending in the second direction of the printing product, a plurality of screw holes formed in one end face of said elongated member and aligned in the second direction of the printing product, and a screw formed on one end of said sheet receiving member to selectively engage with said screw holes.
- 5. An apparatus according to claim 1, wherein said sheet receiving member comprises a rod-like member.
- 6. An apparatus according to claim 1, whereinsaid drive means comprises an air cylinder having a rod that moves forward and backward, and said sheet receiving member moves between the wait position and the sheet receiving position in accordance with a forward/backward movement of said rod.
- 7. An apparatus according to claim 1, wherein the first direction is a conveying direction of the sheet-like printing product, and the apparatus further comprising different configurations of the support mechanism and sheet receiving member to allow the sheet receiving member to be positioned in different positions along the support mechanism so that the sheet receiving member is positioned between image areas arranged on the sheet-like printing product.
- 8. A sheet receiving apparatus in a sheet-fed rotary printing press, comprising:at least one sheet receiving member inserted in a dropping path for a sheet-like printing product to temporarily stop the printing product after printing; a support mechanism for supporting said sheet receiving member; and drive means for reciprocally driving said support mechanism in a first direction so that said sheet receiving member moves between a wait position and a sheet receiving position while being supported by said support mechanism, wherein said support mechanism supports said sheet receiving member after moving said sheet receiving member in a second direction substantially perpendicular to and in a same substantially horizontal plane as the first direction.
- 9. A sheet receiving apparatus in a sheet-fed rotary printing press, comprising:at least one sheet receiving member inserted in a dropping path for a sheet-like printing product to temporarily stop the printing product after printing; drive means for moving said sheet receiving member in a first direction between a wait position and a sheet receiving position; and a support mechanism for supporting said sheet receiving member in a second direction substantially perpendicular to the first direction, the second direction also parallel to a face of the sheet-like printing product.
- 10. A sheet receiving apparatus in a sheet-fed rotary printing press, comprising:at least one sheet receiving member inserted in a dropping path for a sheet-like printing product to temporarily stop the printing product after printing; drive means for moving said sheet receiving member in a first direction between a wait position and a sheet receiving position; and a support mechanism for supporting said sheet receiving member in a second direction substantially perpendicular to a normal direction extending from a face of the sheet-like printing product and to the first direction.
- 11. A sheet receiving apparatus in a sheet-fed rotary printing press, comprising:at least one sheet receiving member inserted in a dropping path for a sheet-like printing product to temporarily stop the printing product after printing; drive means for moving said sheet receiving member in a first direction between a wait position and a sheet receiving position; and a support mechanism for supporting said sheet receiving member in a second direction substantially perpendicular to the first direction, wherein the sheet-like printing product has a first side substantially parallel to the first direction and a second side that is substantially perpendicular to the first side such that the second direction is parallel with the second side.
Priority Claims (1)
| Number |
Date |
Country |
Kind |
| 10-260111 |
Sep 1998 |
JP |
|
US Referenced Citations (8)
Foreign Referenced Citations (6)
| Number |
Date |
Country |
| 605130 |
Oct 1934 |
DE |
| 2301840 |
Jul 1974 |
DE |
| 787623 |
Dec 1957 |
GB |
| 861133 |
Feb 1961 |
GB |
| 63-87469 |
Apr 1988 |
JP |
| 6387469 |
Apr 1988 |
JP |
