Information
-
Patent Grant
-
6210143
-
Patent Number
6,210,143
-
Date Filed
Thursday, October 1, 199825 years ago
-
Date Issued
Tuesday, April 3, 200123 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Pyon; Harold
- Del Sole; Joseph S
Agents
- Burns, Doane, Swecker & Mathis, L.L.P.
-
CPC
-
US Classifications
Field of Search
US
- 425 722
- 425 66
- 425 142
- 425 3782
- 425 3822
- 425 464
- 264 17717
- 264 2108
- 264 21114
- 264 39
-
International Classifications
-
Abstract
An apparatus for producing yarns comprising a first yarn feeding roller, a second yarn feed roller, winders for winding the respective yarns, yarn breakage detectors and detect yarn breakage, and yarn cutting and sucking devices disposed upstream from the yarn feed rollers and operative in response to a yarn breakage detection signal to cut the group of yarns being wound to which the broken yarn belongs. The respective one yarn cutting and sucking device and the respective one winder form winding units, respectively, and at least two such winding units share at least one of the yarn feed rollers. Therefore, it is possible to increase the yield of yarns.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus for producing yarns of, for example, synthetic fibers.
2. Description of the Related Art
An apparatus for producing yarns, in which spun yarns are wound in the form of packages, includes a first yarn feed roller
11
and a second yarn feed roller
12
for feeding the yarns spun through spinnerets of spinning packs
5
to
10
in a spinning apparatus and cooled by a cooling device (not shown) at a predetermined rate, winders
1
-A and
1
-B for winding the yarns on tubes, yarn breakage detectors
15
-A and
15
-B for detecting that at least one yarn which is being wound by the winder
1
-A or
1
-B has broken, and a yarn cutting and sucking device
17
disposed upstream from the yarn feed roller
11
, which is operative in response to a yarn breakage detection signal to cut all yarns being wound and suck the same, as shown in FIG.
7
.
In the apparatus described above, if at least one yarn in the yarn group is broken for any reasons, the yarn breakage is detected by the yarn breakage detector
15
-A which issues a detection signal. Then, the yarn cutting and sucking device
17
is rapidly operated, by this signal, to cut all the yarns being wound via the first feed roller
11
and the second feed roller
12
by the winders
1
-A and
1
-B and suck the same thereinto, to prevent the yarns from being adversely wound around the first yarn feed roller
11
, the second yarn feed roller
12
and the winders
1
-A and
1
-B, which may result in an abnormality in the spinning operation.
In the above-mentioned method, wherein all the yarns are cut if only one yarn in the group belonging to one winder has broken, the yarns normally wound by another winder without yarn breakage must be cut, resulting in the reduction of yield of yarns as well as an increase in a burden on the operator caused by the threading operation.
SUMMARY OF THE INVENTION
The object of the present invention is to prevent a reduction in the yield of yarns and to prevent the operator's burden from increasing due to the threading operation which results from the fact that yarns of a normally operating winder having no yarn breakage are cut.
To solve the above problems, the present invention provides an apparatus for producing yarns wherein the respective one yarn cutting and sucking device and the respective one winder form one winding unit, and at least two winding units share at least one of the yarn feed rollers.
Additionally, the winders may be arranged in vertical row.
Also, a yarn path control guide may be provided for guiding yarns in such a manner that upon the threading operation of the rear side yarn group across the front side yarn group, due to an occurrence of yarn breakage or the like in the rear side yarn group, the rear side yarn group is moved from the front side region to the rear side region of the first common yarn feed roller while passing under or over the front side yarn group running through the first common yarn feed roller and then moved over or under the second yarn group running through the second common yarn feed roller.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more apparent from the following description of the preferred embodiments, with reference to the accompanying drawings, in which:
FIG. 1
is a schematic front view of one embodiment of an apparatus for producing yarns according to the present invention;
FIG. 2
is a schematic side view of the apparatus shown in
FIG. 1
, illustrating a portion below the first yarn feed roller;
FIG. 3
is a schematic respective view of the apparatus for producing yarns according to the present invention;
FIG. 4
is a view of yarn paths in another embodiment of the apparatus for producing yarns according to the present invention;
FIG. 5
is a view of the apparatus shown in
FIG. 4
;
FIG. 6
is a schematic respective view of a yarn path control guide disposed at a different position; and
FIG. 7
is a schematic respective view of a conventional apparatus for producing yarns;
FIG. 8
is a view of the manner in which a yarn from a group of yarns is laterally moved over another yarn from another group of yarns;
FIG. 9
is a view of the manner in which a yarn from a group of yarns is laterally moved underneath another yarn from group of yarns.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1
is a schematic front view of one embodiment of an apparatus for producing yarns according to the present invention, and
FIG. 2
is a schematic side view thereof, wherein the apparatus for producing yarns includes a spinning device (not shown) for extruding molten polymer through spinnerets of spinning packs
5
to
10
, a yarn cooling device (not shown) disposed beneath the yarn spinning packs
5
to
10
, a first yarn feed roller
11
and a second yarn feed roller
12
for feeding the cooled yarn at a predetermined rate, winders
1
-A and
1
-B for winding the yarns on tubes, a yarn breakage detector
15
-A for detecting the yarn breakage corresponding to any one of the yarns
51
,
52
,
61
,
62
,
71
and
72
being wound on the winder
1
-A, a yarn breakage detector
15
-B for detecting the yarn breakage corresponding to any one of the yarns
81
,
82
,
91
,
92
,
101
and
102
being wound on the winder
1
-B, yarn cutting and sucking devices
17
-A and
17
-B disposed upstream from the first yarn feed roller
11
and operative in response to a yarn breakage signal to cut and suck all the yarns in a group to which the broken yarn detected by the yarn breakage detector belongs, a yarn separating guide
13
disposed beneath the yarn cutting and sucking devices
17
-A and
17
-B, for dividing the yarns into two groups and guide the same, and traverse motion fulcrum guides
14
-A and
14
-B disposed above the respective winders
1
-A and
1
-B.
Each of the winders
1
-A and
1
-B is provided with a traverse motion device
4
for traversing the yarn, a pair of spindles
2
-
1
and
2
-
2
for winding the yarn thereon alternately with each other, a roller bail
3
for applying a proper pressure to a surface of a package formed on the spindle to make the package to have a flat and uniform surface and a suitable hardness, and a yarn switching device (not shown) for switching the yarn from a full package tube to a waiting empty tube when the package has reached a predetermined size. Such winders are superposed in a vertical row, one above another, for the purpose of saving an installation space as much as possible relative to the number of yarns to be wound.
Pairs of yarns
51
,
52
. . . , and
101
,
102
, extruded from spinnerets of each of the spinning packs
5
to
10
, respectively, are cooled and solidified by the yarn cooling device (not shown) disposed directly beneath the spinnerets. After being imparted with process oil, the respective yarns are delivered to predetermined positions on the first yarn feed roller
11
and the second yarn feed roller
12
by the yarn separating guide
13
, via the yarn cutting and sucking devices
17
-A and
17
-B for treating the group of yarns, respectively, to cut and suck the same in response to the operation of the yarn breakage detectors
15
which are provided for every yarn to quickly detect any breakage of yarns due to an abnormality in the process and to deliver the signal to the control unit. The yarns are finally wound by the winders via the traverse motion fulcrum guides
14
.
The yarn separating guide
13
may be formed of a first set of guides
13
-A and a second set of guides
13
-B corresponding to the winders
1
-A and
1
-B, when the function thereof is divided.
In this case, the traverse motion fulcrum guide
14
-A or the yarn to be wound by the lower winder
1
-A is disposed far from the second yarn feed roller
12
, and the traverse motion fulcrum guide
14
-B for the yarn to be wound by the upper winder I-B is disposed close to the second yarn feed roller
12
.
In this respect, the yarn separating guide
13
(
13
-A and
13
-B), a first yarn path control guide
16
having third
16
-A and fourth
16
-B sets of guides, a second yarn path control guide
18
having fifth
18
-B and sixth
18
-A sets of guides, and the traverse motion fulcrum guide
14
(
14
-A and
14
-B) may be arranged in such a manner that they can be pulled forward during the threading operation and returned to the original position after the yarns have been threaded to the respective guides.
More specifically, six yarns
51
,
52
,
61
,
62
,
71
, and
72
extruded from the spinning packs
5
to
7
run through the yarn cutting and sucking device
17
-A, while six yarns
81
,
82
,
91
,
92
,
101
, and
102
extruded from the spinning packs
8
to
10
run through the yarn cutting and sucking device
17
-B.
The yarns
51
,
52
,
61
,
62
, . . .
91
,
92
,
101
, and
102
run through the yarn separating guide
13
and maintain the positions arranged in this order. Such positions are invariable even on the first yarn feed roller
11
and the second yarn feed roller
12
, whereby the yarns
51
to
72
are wound by the lower winder
1
-A and the yarns
81
to
102
are wound by the upper winder
1
-B, via the traverse motion fulcrum guides
14
-A and
14
-B, respectively.
It will be understood that the winder
1
-A is combined with the yarn cutting and sucking device
17
-A, while the winder
1
-B is combined with the yarn cutting and sucking device
17
-B to form winder units, respectively. Accordingly, if the yarn
92
is broken during the winding operation of the winder
1
-B, the yarn breakage detector
15
-B provided in correspondence to the yarn
92
detects the breakage and informs the same to a controller (not shown). The controller promptly causes the corresponding yarn cutting and sucking device
17
-B to operate to cut yarns
81
to
102
belonging to the same group as the yarn
92
and suck the same thereinto so that no trouble occurs in the yarn spinning system now in operation. At this instant, all the yarns being wound by the winder I-B are severed.
In some cases, there might be an extremely small amount of yarn piece which is wound around the first yarn feed roller
11
or the second yarn feed roller
12
at a position corresponding to the running path of the broken yarn
92
. This yarn piece is easily displaceable to the front side (to the distal end of the roller), using a bamboo spatula or the like to remove the yarn piece from the roller without causing a trouble with another group of the yarn
51
to
72
being wound. Therefore, even if the winding operation of the one winder
1
-B is interrupted due to the yarn breakage, the other winder
1
-A continues a normal winding operation.
Upon the yarn breakage, the tubes in the winder
1
-B carrying incomplete packages thereon must be exchanged with fresh empty tubes, on which the spun yarns must be immediately threaded. At that time, the group of yarns
51
to
72
which are continuously wound by the winder
1
-A are running through the front side region of the first and second yarn feed rollers
11
and
12
. Therefore, the group of yarns
81
to
102
must slip into the rear side region of the first and second yarn feed rollers
11
and
12
and pass through the predetermined positions on the rollers without disturbing the running of the group of yarns
51
, to
72
.
It might be questioned if such a threading operation is possible. However, it is possible under the following conditions:
First, the group of yarns
81
to
102
which are being sucked into the yarn cutting and sucking device
17
-B are sucked together by a suction gun (not shown). The respective yarns are individually separated by the yarn separating guide
13
to be located at predetermined positions. While maintaining such a condition, the suction gun is displaced in the running direction of the yarn feed rollers, so that after the gun passes through the second yarn feed roller
12
, yarn suction nozzles of the suction gun (not shown) reach a point beneath the group of yarns subjected to the normal winding operation, i.e., a point on the side of the traverse motion fulcrum guide
14
-B, then, the respective yarns are automatically positioned in the order defined by the yarn separating guide
13
. That is, as seen in
FIG. 8
, on the first yarn feed roller
11
, the group of yarns to be threaded, in this case the second group of yarns (only yarn
81
is shown), laterally move over the group of yarns subjected to the normal winding operation, the first group of yarns (only yarn
51
is shown), and enter the rear side region. Meanwhile, on the second yarn feed roller
12
, the group of yarns to be threaded laterally move under the group of normal yarns and enter the rear side region. Since both groups of yarns run at the same speed and at an angle, the yarns are immediately positioned at the normal positions without the occurrence of tangling or any filament breakage in the respective yarn.
FIG. 9
illustrates the condition in which the first group of yarns (only yarn
51
is shown) is laterally moved underneath the second group of yarns (only yarn
81
is shown).
In such a manner, the winding operation is started again on the winder
1
-B.
By the way, it realizes the same effect to use the method of polymer stop by a gear pump (not shown), without the yarn cutting and sucking device
17
.
Another embodiment of an apparatus for producing yarns according to the present invention is illustrated in
FIG. 3
, wherein a group of yarns moving via the yarn cutting and sucking device
17
-A pass through the yarn separating guide
13
-A of the yarn separating guide
13
disposed on the side of the second yarn feed roller
12
and run around the first yarn feed roller
11
. Another group of yarns moving via the yarn cutting and sucking device
17
-B pass through the yarn separating guide
13
-B of the yarn separating guide
13
on the side opposite to the second yarn feed roller
12
and run around the first yarn feed roller
11
, as shown in
FIGS. 4 and 5
.
As best seen in
FIG. 4
, the second yarn separating guide
13
-A and the frist yarn separating guide
13
-B are arranged so that the respective yarns
51
,
81
,
52
,
82
,
61
,
91
,
62
,
92
,
71
,
101
,
72
and
102
are positioned alternately in this order prior to entering the first yarn feed roller
11
. The yarn separating guide
13
(
13
-A and
13
-B) also functions in much the same manner as the first and second yarn path control guides. After the respective yarns have exited the first yarn feed roller
11
and before they have entered the second yarn feed roller
12
, the yarn path of the one group of yarns
51
to
72
is controlled by the third guides
16
-A of the first yarn path control guide
16
provided on one side thereof, and the yarn path of the other group of yarns
81
to
102
is controlled by the fourth guides
16
-B provided on the other side. After the respective yarns have exited the second feed roller
12
, the yarn path of the one group of yarns
51
to
72
is controlled by the sixth set guides
18
-A of the second yarn path control guide
18
provided on one side thereof, and the yarn path of the other group of yarns
81
to
102
is controlled by the fifth set of guides
18
-B of the second yarn path control guide
18
on the other side thereof.
The positioning of the yarn separating guides, first and second yarn feed rollers, and first and second yarn path control guides will now be described in greater detail with reference to FIG.
4
. The second yarn separating guides
13
-A are inside guides and the first yarn separating guides
13
-B are outside guides with respect to the first yarn feed roller
11
. The third yarn path control guides
16
-A are inside guides and the fourth yarn path control guides
16
-B are outside guides with respect to the first feed roller
11
. The fourth yarn path control guides
16
-B are inside guides and the third yarn path control guides
16
-A are outside guides with respect to the second yarn feed roller
12
. The fifth yarn path control guides
18
-B are inside guides and the sixth yarn path control guides
18
-A are outside guides with respect to the second yarn feed roller
12
. Thus, consideration of the third
16
-A and fourth
16
-B guides of the first yarn path control guide
16
as being inside or outside guides is determined by the particular reference to either the first
11
or second
12
yarn feed roller. After exiting the second yarn feed roller
12
, the respective yarns
51
to
72
in the one group pass through the sixth guide
18
-A of the second yarn path control guide
18
and the respective yarns
81
to
102
in the other group of yarns pass the fifth guide
18
-B of the second yarn path control guide
18
. The yarns are then wound by the winders
1
-A and
1
-B, respectively.
If at least one yarn, for example, a yarn
92
wound by the winder
1
-B has been broken during the normal winding operation, the yarn breakage detector
15
-B provided for this yarn
92
detects the yarn breakage and informs this fact to the controller (not shown). The controller promptly causes the corresponding yarn cutting and sucking device
17
-B to operate to cut the yarns
81
to
102
belonging to the same group and suck the same thereinto so that no trouble occurs in the other part of the yarn spinning apparatus. It will be apparent that all the yarns to be wound by the winder
1
-B are cut at this instant.
There might be an extremely small amount of yarn pieces wound on a running path of the yarn
92
around the first yarn feed roller
11
or the second yarn feed roller
12
due to conditions whereby the yarn breakage has been generated. The wound yarn pieces, however, can be easily pushed toward the front side (i.e., to a distal end of the roller), for example, by a bamboo spatula and removed from the roller without disturbing the group of yarns
51
to
72
being wound. Accordingly, it is possible to continue the normal winding operation by the winder
1
-A even though the winding operation of the winder
1
-B has been interrupted due to the yarn breakage.
Now, it is necessary to exchange incomplete yarn packages on the winder
1
-B caused by the yarn breakage with fresh empty tubes and thread the yarns thereon immediately. At this time, the group of yarns
51
to
72
belonging to the winder
1
-A are running through the first yarn feed roller
11
and the second yarn feed roller
12
. Therefore, the yarns
81
to
102
belonging to the winder
1
-B must be located at positions alternate with those
51
to
72
belonging to the winder
1
-A without disturbing the latter.
Also in this case, the threading operation can be smoothly carried out as described before, irrespective of existence of the group of yarns running in the front side region.
That is, the group of yarns
81
to
102
sucked into the yarn cutting and sucking device
17
-B are sucked together by the suction gun (not shown). The suction gun is displaced in the running direction of the first yarn feed roller
11
while maintaining the respective yarns in the predetermined positions in the section
13
-B of the yarn separating guide
13
, until reaching the yarn path control guide
16
, at which the respective yarns are threaded into the predetermined position in the section
16
-B. At this time, the respective yarns laterally move along the first yarn feed roller
11
to pass over the group of yarns normally being wound, into the predetermined positions. After the yarns are threaded to the group or guides in the section
16
-B, the suction gun is displaced in the running direction of the second yarn feed roller
12
and made to stop at a position somewhat exceeding the traverse motion fulcrum guide
18
. On the second yarn feed roller
12
, the group of yarns
81
to
102
laterally moves therealong to pass under the group of yarns normally being wound, by pushing the guides
16
-A and
16
-B at the same time into the predetermined position. Since both the groups of yarns run at the same speed and at an angle therebetween, the yarns are immediately positioned at normal positions without the occurrence of tangling or any filament breakage in the respective yarn. Then, the operator threads the respective yarn into the traverse motion fulcrum guide
14
-B to start the winding operation of the winder
1
-B.
In such a manner, the winder I-B is made to restart.
As seen in
FIG. 3
, the yarn paths on the second yarn feed roller
12
are defined in a generally middle region in a space occupied by the respective packages in the axial direction. If the distance between the first yarn feed roller
11
and the yarn control guide
16
or between the second yarn feed roller
12
and the winder fanning guide is so short that the yarns
52
and
102
running in the opposite end yarn paths have an excessively large braking angle from a center line, the second yarn path control guide
18
may be provided as shown in
FIG. 6
in the vicinity of the second yarn feed roller
12
. The yarns enter the respective traverse motion fulcrum guides
14
via the second yarn path control guide
18
so that the yarn running conditions such as running angle, traverse length or others become optimum even though the profile take-up machine.
In the embodiment shown in
FIG. 1
, the yarn exiting the second yarn feed roller
12
directly reaches the traverse motion fulcrum guide
14
. However, a second yarn path control guide may be disposed at a position between the traverse motion fulcrum guide
14
and the second yarn feed roller
12
closer to the latter.
In such a case, the distance between the winder and the second yarn feed roller can be reduced compared with the first embodiment, which facilitates the threading operation and minimizes a machine height to reduce the size of the apparatus.
Even in a case wherein winders are superposed with each other to form a vertical row arrangement, it is possible to reduce a total height of the apparatus for producing yarns as well as an installation space compared with the prior art apparatus.
According to the apparatus for producing yarns of the present invention, since the respective one yarn cutting and sucking device and the respective one winder form winding units, and at least two winding units share at least one of the yarn feed rollers, the number of yarns to be cut and sucked when the yarn breakage has occurred is reduced to improve the yield of the yarns and mitigate the operator's load due to the threading operation. On the contrary, in the prior art, if at least one yarn in a group of yarns processed in the same apparatus has been broken, all the yarns including those belonging to the winder continuing the normal winding operation must be cut and sucked, as waste, to lower the yield.
According to the apparatus of the present invention wherein the winders are arranged in a vertical row, it is possible to save the installation space of the apparatus. According to the apparatus of the present invention, yarn path control guides are provided for guiding a first yarn group to be threaded from the front side region to the rear side region while passing under or over a second yarn group which is the front side yarn group running across the first common yarn feed roller and then passing over or under the second yarn group running across the second common yarn feed roller, for the purpose of carrying out the threading operation in the inner side yarn group while crossing the front side yarn group, for example, due to the yarn breakage generating in the rear side yarn group. Thereby, it is possible to reduce the distance between the winder and the second yarn feed roller and therefore facilitate the threading operation. Also, it is possible to reduce a total height of the apparatus, which enables the elimination of an intermediate floor for the threading operation.
Claims
- 1. An apparatus for producing yarns comprising:a spinning device having spinning packs for extruding molten polymer to form first and second groups of yarns; at least one yarn feeding roller for feeding the first and second groups of yarns; a first winder having a spindle for winding the first group of yarns on tubes arranged on said spindle of the first winder; a second winder having a spindle for winding the second group of yarns on tubes arranged on said spindle of said second winder, said first and second winders being arranged to receive said first and second groups of yarns commonly from said at least one yarn feeding roller; a first yarn breakage detector arranged between said at least one yarn feeding roller and said first winder for detecting breakage of at least one of the yarns belonging to the first group of yarns; a second yarn breakage detector arranged between said at least one yarn feeding roller and said second winder for detecting breakage of at least one of the yarns belonging to the second group of yarns; a first yarn cutting and sucking device disposed between said spinning device and said at least one yarn feeding roller and operative in response to a yarn breakage detection signal to cut and suck said first group of yarns; a second yarn cutting and sucking device disposed between said spinning device and said at least one yarn feeding roller and operative in response to a yarn breakage detection signal to cut and suck said second group of yarns; wherein said first yarn cutting and sucking device and said first winder form a first winding unit, said second yarn cutting and sucking device and said second winder form a second winding unit, and said first and second winding units share said at least one yarn feeding roller; and at least one yarn path control guide arranged near said at least one yarn feeding roller and including a first set of guide elements for guiding the first group of yarns and a second set of guide elements for guiding the second group of yarns so that yarns of said first and second groups are alternately positionable along the length of said at least one feeding roller, one of said first and second sets of guide elements being movable while the other of said first and second sets of guide elements are guiding the corresponding group of yarns.
- 2. An apparatus for producing yarns according to claim 1, wherein the winders are arranged in a vertical row.
- 3. An apparatus for producing yarns according to claim 1,wherein said at least one yarn feeding roller comprises first and second yarn feeding rollers arranged in series; and wherein said first group of yarns is positionable on a front side of said at least one yarn path control guide and said second group of yarns is positionable on a rear side of said at least one yarn path control guide, said at least one yarn path control guide being positioned relative to the first and second yarn feeding rollers so that upon the occurrence of a yarn breakage in the first group of yarns and subsequent threading operation of the first group of yarns, the first group of yarns is movable from a front side region of the first yarn feeding roller towards a rear side region of the first yarn feeding roller while passing under the second group of yarns on the first yarn feeding roller and is then movable from a front side region of the second yarn feeding roller towards a rear side region of the second yarn feeding roller while passing over the second group of yarns on the second yarn feeding roller.
- 4. An apparatus for producing yarns according to claim 3, wherein upon the occurrence of a yarn breakage in the second group of yarns and subsequent threading operation of the second group of yarns, the second group of yarns is movable from the front side region of the first yarn feeding roller towards the rear side region of the first yarn feeding roller while passing over the first group of yarns on the first yarn feeding roller and is then movable from the front side region of the second yarn feeding roller towards the rear side region of the second yarn feeding roller while passing under the first group of yarns on the second yarn feeding roller.
- 5. An apparatus for producing yarns according to claim 1, further comprising a yarn separating guide having first and second guides, a first yarn path control guide having third and fourth guides, said yarn separating guide and said first yarn path control guide being arranged on opposite sides of a first yarn feeding roller, wherein said first and fourth guides are arranged outside said second and third guides with respect to said first yarn feeding roller.
- 6. An apparatus for producing yarns according to claim 5, further comprising a second yarn feeding roller arranged in series with said first yarn feeding roller, said second and third guides forming inside guides with respect to said first yarn feeding roller and said first and fourth guides forming outside guides with respect to said first yarn feeding roller.
- 7. An apparatus for producing yarns according to claim 6, further comprising a second yarn path control guide having fifth and sixth guides, said second yarn feeding roller being arranged between said first yarn path control guide and said second yarn path control guide, said fourth and fifth guides forming inside guides with respect to said second yarn feeding roller, said third and sixth guides forming outside guides with respect to said second yarn feeding roller.
- 8. An apparatus for producing yarns comprising:a spinning device having spinning packs for extruding molten polymer to form a first group of yarns and a second group of yarns; a first yarn feeding roller and a second yarn feeding roller for feeding the first and second groups of yarns so that the first and second groups of yarns run sequentially through said first and second yarn feeding rollers; a first yarn cutting and sucking device disposed between said spinning device and said first yarn feeding roller and operative in response to a yarn breakage detection signal to cut and suck said first group of yarns; a second yarn cutting and sucking device disposed between said spinning device and said first yarn feeding roller and operative in response to a yarn breakage detection signal to cut and suck said second group of yarns; a yarn separating guide having a first guide and a second guide; a first yarn path control guide having a third guide and a fourth guide; said second and third guides being arranged between the first and fourth guides with respect to said first yarn feeding roller; said first, second, third and fourth guides and said first and second yarn feeding rollers being positioned so that said first group of yarns passes through said first guide, around said first yarn feeding roller, through said fourth guide, and around said second yarn feeding roller while said second group of yarns passes through said second guide, around said first yarn feeding roller, through said third guide and around said second yarn feeding roller; a first winder having a first spindle for winding the first group of yarns on tubes arranged on said first spindle of said first winder; a second winder having a second spindle for winding the second group of yarns on tubes arranged on said second spindle of said second winder; a first yarn breakage detector arranged between said first and second yarn feeding rollers and said first winder for detecting breakage of at least one yarn of the first group of yarns; a second yarn breakage detector arranged between said first and second yarn feeding rollers and said second winder for detecting breakage of at least one yarn of the second group of yarns; and said first yarn cutting and sucking device and said first winder forming a first winding unit, said second yarn cutting and sucking device and said second winder forming a second winding unit, and said first and second winding units sharing said first and second yarn feeding rollers.
- 9. An apparatus for producing yarns according to claim 8, further comprising:a second yarn path control guide having a fifth guide and a sixth guide; said fifth guide being positioned between said second yarn feeding roller and said second winder; said sixth guide being positioned between said second yarn feeding roller and said first winder; said fifth guide and said fourth guide being arranged between said sixth guide and said third guide; and said fifth and sixth guides being positioned so that said first group of yarns further passes through said sixth guide and said second group of yarns further passes through said fifth guide.
- 10. An apparatus for producing yarns according to claim 8, wherein said first or second group of yarns continues to be wound on said tubes upon the yarn-breakage of the other of said first or second group of yarns and during the subsequent threading operation of the broken group of yarns.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-287829 |
Oct 1997 |
JP |
|
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3719442 |
Schippers et al. |
Mar 1973 |
|
4522774 |
Donnelly et al. |
Jun 1985 |
|
5419110 |
Mikami et al. |
May 1995 |
|
5794868 |
Busenhart et al. |
Aug 1998 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
52-24129 |
Jun 1977 |
JP |