JPH0687364U - Drum cover - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to reliably guide the cutting thread end to the center of the traverse area in the end face drop prevention guide in an automatic winder or the like. [Structure] The end face drop prevention guide bases B are mounted so as to be individually position-adjustable with a slight gap provided therebetween.
The left and right drum covers 1 and 2 that cover the front surface of the traverse drum D are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drum cover equipped with end face drop prevention means that is attached to the front face of a traverse drum such as an automatic winder for winding a yarn while traversing the yarn and prevents the yarn from falling to the end face of the package. .

[0002]

[Prior art]

 As an end face drop prevention means for an automatic winder, an end face drop prevention guide shown in FIG. 5 and the like have been conventionally known (Japanese Patent Application No. 4-64727). The end face drop prevention guides include a front guide plate 20, a rear guide plate 21 having a guide edge 21a for guiding the cutting yarn end near the center of the traverse area formed on the yarn entering side, and a rear guide plate 21 on the front guide plate 20 side. The protruding regulation plate 22 is integrated. In this end face drop prevention guide, when the yarn is cut during the winding of the yarn, the cut yarn end receives an inward force from the guide edge 21a of the rear guide plate 21 and moves to the vicinity of the center of the traverse area while being package P. Being rolled up. At that time, since the regulating plate 22 bends the yarn path, it is possible to prevent the rear guide plate 21 from being in surface contact with the rear guide plate 21, and it becomes easy to control the yarn by the guide edge 21a.

[0003]

[Problems to be solved by the device]

 In the end face drop prevention guide described above, since the yarn traveling path is separated from the traverse drum D because the regulation plate 22 is provided, the tenser (25 in FIG. 7) of the yarn is prevented from winding during winding. When thread breakage occurs on the downstream side, the cut thread end is in a free state where no tension is applied. Further, the yarn is exposed to the accompanying airflow that flows forward due to the rotation of the winding package P and the traverse drum D, which is indicated by the arrow in FIG. 6, and the behavior of the yarn becomes unstable, and the yarn is not guided to the center of the traverse area. It may fall from the end and wind around the bobbin or the bobbin supporting part of the cradle 23, and the end face drop prevention effect decreases, which not only lowers the operation rate of the automatic winder, but also reduces the yarn splicing as shown in FIG. In advance, when the suction mouth 24 sucks the yarn on the winding package P side, the yarn dropped from the end face and the yarn of the winding package P may be pulled out twice to form an inappropriate seam.

By the way, the entrained airflow generated by the rotation of the winding package P and the traverse drum D, along the contact line between the traverse drum D and the take-up package P, as shown by the arrow in FIG. Although it also flows to the end face side of P to promote the end face drop of the yarn, the above end face drop prevention guide is not devised to prevent the accompanying air flow.

Further, since the above-mentioned end face drop prevention guide is fixed to the frame F of the automatic winder only on one side on the right side, a predetermined gap is set between the traverse drum D and the rear guide plate 21 on the right side or the left side. Even if the traverse drum D and the other part of the rear guide plate 21 are separated from each other, the gap between them may deviate from a predetermined value. In that case, if a yarn breakage occurs on the downstream side of the tensor 25 during winding, the cutting yarn end is in a free state where no tension is applied to the cutting yarn end at a part of the rear guide plate 21, and as described above, the end face drop prevention effect decreases. To do.

By the way, when the slab catcher 7 detects a yarn defect (existence of a thick portion or the like) or a yarn break, the traverse drum D is temporarily stopped and the suction mouth 24 is rotated toward the package P side. The yarn end on the package P side is suctioned and gripped, and is further rotated to the yarn splicing device 26 side. At that time, if the slab catcher 7 detects the thread defect again and cuts the thread, the thread loses tension and bounces in an unspecified direction, but in the end face drop prevention guide, the thread is guided to the center part. No force is applied and the end faces may fall off.

Further, the traverse drum D is formed with a guide groove L for traversing the yarn wound around the package P to the left and right, but it is shallow as shown in FIG. 7 for guiding the yarn from right to left. At the intersection of the guide groove L1 and the deep guide groove L2 that guides the yarn from the left to the right, the yarn guided from the right to the intersection and the yarn that should originally move further to the left enters the deep guide groove L2 and from there. Back to the right often occurs, which results in the formation of malformed packages or tightly packed packages. This is remarkable because the higher the yarn speed, the lower the yarn tension. The above-mentioned end face drop prevention guide has not been devised to prevent this phenomenon.

An object of the present invention is to provide a drum cover equipped with end face drop preventing means in an automatic winder or the like that can reliably guide the cut yarn end to the center of the traverse area.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the drum cover of the present invention is a left and right cover for covering the front surface of a traverse drum, which is separately mounted on the left and right sides of the drum cover base with a slight gap therebetween. It has a member.

[0010]

[Action]

 In the drum cover configured as described above, the left and right cover members are individually adjusted in position and attached to the drum cover base, so that the left and right approaching degrees to the traverse drum are matched and possible. As close as possible to the traverse drum, it is possible to control the behavior of the yarn end cut during winding.

[0011]

【Example】

 The drum cover of the present invention will be described with reference to FIGS.

The drum covers are individually fixed to the left and right sides of the drum cover base B with a slight mutual gap therebetween, and the left and right cover members 1 and 2 that cover the front surface of the traverse drum D and the upper parts thereof. The left and right airflow stop guides 3 and 4 are respectively provided upright at the ends, and a traverse guide 5 fixed to the lower portion of the drum cover base B. Here, Y is a yarn, and Y1 shows the traveling direction of the yarn.

The drum cover base B is fixed to the frame body (not shown) of the winding unit of the automatic winder so as to be in close contact with the traverse drum D. The two holes Ba and Bb shown in FIG. 3 are bolt insertion holes for fixing the holes.

The cover member 1 is composed of an upper cover 1a that is curved along the curved surface of the traverse drum D, and a lower cover 1b that is then bent at 50-60 °, and has a bent ridgeline 1c. Is designed to be closer to the traverse drum D as it gets closer to the center of the traverse area, and the guide edge 1d at the lower end of the lower cover 1b is designed to be extremely close to the peripheral surface of the traverse drum D. . Further, the guide edge 1d is inclined upward so that the guide edge 1d approaches the package P side which is the downstream side in the traveling direction of the yarn Y as it gets closer to the center of the traverse area, and when the yarn Y is cut, its yarn end is traversed. D It is designed to be centered. As shown in FIG. 2, the lower cover 1b is formed with an elongated hole 1e for inserting a set screw when the drum cover base B is attached. The cover member 2 has the same configuration as the cover member 1.

Since the cover members 1 and 2 have the above-described guide edges 1d and 2d, when the yarn breaks during winding, or when the slab catcher 7 detects a yarn defect and cuts the yarn. In addition, the yarn end on the side of the winding package P is guided to the center of the traverse region by being guided to the center of the traverse region by the edge portion 1d or the edge portion 2d that is inclined downstream in the yarn traveling direction. Get off. When the suction mouth sucks and grips the yarn end on the package P side and turns to the knotter side during yarn splicing, the slab catcher 7 detects the yarn defect again and cuts the yarn. Even if the yarn is bounced to, the yarn (Y indicated by a two-dot chain line in FIG. 4) is guided to the center of the traverse region by being guided to the ridge line 1c closer to the traverse drum D as it gets closer to the center of the traverse region. It prevents the end face from falling off.

When fixed to the drum cover base B, the respective cover members 1 and 2 can individually adjust the degree of access to the traverse drum D individually by the long hole 1e or the long hole 2e. Therefore, it is possible to prevent one cover member from being separated from the traverse drum D by a predetermined distance or more, and both the cover members 1 and 2 can be brought as close to the traverse drum D as possible.

When fixing the cover members 1 and 2 to the drum cover base B, as shown in FIGS. 3 and 4, between the upper side of the drum cover base B and the lower side of the lower cover 1b. A thin plate (regulating member) 6 having abrasion resistance such as nylon is sandwiched. The thin plate 6 is fixed so as to be close to the traverse drum D so as to come in contact therewith. Therefore, since the drum cover approaches the traverse drum D at three points, the upper cover 1a, the edge of the thin plate 6 and the guide edge 1d of the lower cover 1b, the yarn to be cut and wound has a certain resistance at two points. Is given to bring about a state of constant tension and prevent the yarn from becoming unstable. Therefore, the cut yarn end does not come off from the traverse region to the outside, and is reliably guided to the center of the traverse region by being guided by the edge portion 1d or the edge portion 2d.

The airflow stop guide 3 is provided over the upper portions of the upper cover 1a and the lower cover 1b at a position corresponding to the left end of the winding package P, and is screwed. On the upper surface of the lower cover 1b, a hole 1f for inserting the set screw is formed. The air flow stop guide 4 is almost the same as the air flow stop guide 3.

By providing such airflow stop guides 3 and 4, as shown in FIG. 1, it is possible to block the accompanying airflow that flows outward in the axial direction of the package P due to the rotation of the winding package P. Therefore, it is possible to prevent the yarn end cut during winding from falling on the end face due to the accompanying air flow.

The traverse guide 5 has a guide edge 5a projecting in a mountain shape, and is fixed to a lower portion of the drum cover base B so as to project forward. The most projecting portion 5a 'of the guide edge 5a is a portion of the traverse drum D where the shallow guide groove L1 for guiding the yarn from right to left intersects with the deep guide groove L2 for guiding the yarn from left to right. It is designed to be slightly offset to the right.

Therefore, in this drum cover, the yarn wound while being guided by the shallow guide groove L1 and being guided from right to left is already moved to the traverse guide 5 by the time it moves to the intersection with the deep guide groove L2. Since it is on the left side beyond the most projecting portion 5a ', even if it is guided to the deep guide groove L2 thereafter, it cannot be crossed over the most projecting portion 5a' and is stopped, while the traverse drum D rotates. The warp thread again engages with the shallow guide groove L 1, and a normal traverse is performed.

In the automatic winder equipped with the drum cover having such a configuration, the yarn is guided to the guide groove of the traverse drum D, travels while traversing, and is wound into the package P. When the yarn is cut during the winding of the yarn, even if the cutting occurs on the downstream side of the tenser 7, the cut yarn end has three positions of the upper cover 1a, the edge of the thin plate 6 and the guide edge 1d of the lower cover 1b. By being constrained to some extent, a constant tension is applied, and a force directed inward from the edge portion 1d or the edge portion 2d is received, and while moving toward the center of the traverse area, the package P is wound up. Also, when the suction mouth sucks and grips the package-side yarn end during yarn splicing and the yarn breaks when turning to the knotter side, the yarn end receives the inward force from the ridge line 1c and the center of the traverse area is reached. Guided to the department.

[0023]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

That is, the left and right cover members can be brought as close as possible to the traverse drum, and it is possible to prevent the yarn ends from becoming free even if the yarn is cut during winding. In addition, since the left and right cover members can be made to approach the traverse drum at the same degree, the left and right cover ends can be evenly controlled. As a result, the effect of preventing the end face from falling can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a drum cover of the present invention attached to an automatic winder unit.

FIG. 2 is a plan view of the drum cover of the present invention.

FIG. 3 is a right side view of the drum cover of the present invention.

FIG. 4 is a left side view of the drum cover of the present invention.

FIG. 5 is a perspective view of a conventional end face drop prevention guide attached to a unit of an automatic winder.

FIG. 6 is a side view of a winding unit in the winding unit.

FIG. 7 is a front view of a winding unit of the winding unit.

[Explanation of symbols]

 1 Left cover member 2 Right cover member B Drum cover base D Traverse drum

Claims (1)

[Scope of utility model registration request] 1. A drum cover having left and right cover members for covering the front surface of a traverse drum, which are individually mounted on the left and right sides of a drum cover base with a slight gap therebetween so as to be position-adjustable.