JPH02152877A - Threading-cum-end yarn rewinding preventer for automatic transfer type winder - Google Patents

Abstract

PURPOSE:To make it stowable in a compact space by inserting a end yarn rewinding preventer into space between an empty bobbin and a full bobbin by means of multinodal linkage being folded and housed in a position uncontacted with the circumference of a receiving bobbin. CONSTITUTION:Linkage 8 is set up in a cam box 6, and at time of normal winding, it is housed in a position above right in illustration in a state of being folded, and thereby it is in no case made contact with a full bobbin 3. When this linkage 8 operates and an end yarn rewinding preventer 9 is inserted in space between an empty bobbin 4 and the full bobbin 3, yarn 1 is rolled on the empty bobbin 4, while another yarn on the full bobbin 3 is cut off so that end yarn 10 is produced there. Since the end yarn rewinding preventer 9 has been inserted thereinto, the end yarn 10 will not come into contact with the empty bobbin 4 where the yarn is already wound, thus it is protected in an innermost layer of the empty bobbin 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thread attachment and end thread entanglement prevention device for an automatic switching type winder. In more detail, the automatic switching type winder allows the work to prevent end threads from being entangled and protect the innermost layer on the empty bobbin side at the same time as the threading work, and can be stored in a compact space. This invention relates to a thread attachment and end thread entanglement prevention device for a take-up machine.

[Prior Art and Problems to be Solved by the Invention] An automatic switching type winder comprising a pair of winding bobbin shafts disposed via bearings at both ends of an arm rotatably supported at its center point. In a take-up machine, after switching from a full bobbin at the winding position to an empty bobbin, it is important to protect the innermost layer of yarn on the empty bobbin from being damaged by the end yarn on the full bobbin. Necessary to maintain quality.

Conventionally known typical end yarn entrapment prevention devices for protecting the innermost layer on the empty tube bobbin side include an arcuate plate type end yarn entrapment prevention device and a curved plate type end yarn entrapment prevention device.

As shown in FIG. 4, the former arc-type end yarn entrapment prevention device immediately switches between the full bobbin 3 and the empty bobbin 4 and attaches the yarn to the innermost layer protection plate 31 on the upper left side and the innermost layer on the lower right side. As shown by the arrow in FIG. 4, the protection plate 32 advances between the full bobbin 3 and the empty bobbin 4 by moving in a straight line and swinging, thereby causing the end yarn 30 of the full bobbin 3 to This prevents contact with the empty tube bobbin 4. However, this device has a complicated structure in which the two protection plates 31 and 32 are driven separately, and the thread attachment does not also function as a device, so the thread attachment requires that the protection plate be placed in a predetermined position after work. There is a problem in that it takes time (for example, about 1 second) to complete the process, and the innermost layer of the empty tube bobbin is not protected at all during this time.

As shown in FIG. 5, the latter curved plate type end yarn entanglement prevention device is such that immediately after switching between the full bobbin 3 and the empty bobbin 4, the bent plate 33, which also serves as a device for attaching the thread, is activated as shown by the arrow in FIG. The thread swings from the upper right side and advances between the full bobbin 3 and the empty bobbin 4, thereby preventing the end yarn 30 of the full bobbin 3 from coming into contact with the empty bobbin 4. This device also serves as a threading device, so it can protect the empty bobbin side at the same time as threading, but it has a structure in which the bending plate 33 advances between the full bobbin 3 and the empty bobbin 4 by swinging motion. Therefore, there is a problem in that the size of the bending plate 33 is limited due to space limitations during storage, and as a result, the innermost layer of the empty tube bobbin is not completely protected.

The present invention solves the problems of conventionally known end yarn entanglement prevention devices, and prevents end yarn entanglement of the full bobbin immediately after automatic switching from the full bobbin to the empty bobbin, and prevents the end yarn from being entangled on the empty bobbin side. It is an object of the present invention to provide an end yarn entanglement prevention device that can reliably protect the innermost layer and can be stored in a compact space during normal operation of a winder.

[Means to solve the problem]

The end yarn entanglement prevention device according to the present invention is provided with a yarn attachment means, which comprises a multi-articulated link mechanism consisting of at least two fixed swinging links fixed to the stand of the winding machine, and The attachment means is provided at the free end of the end yarn entrapment prevention plate, and is located at a position where the multi-joint link mechanism does not come into contact with the outer periphery of the winding bobbin during the winding operation of the winder and during the bobbin switching operation. In order to store the multi-joint link mechanism in a folded shape, and when winding yarn onto an empty bobbin, the end yarn entrapment prevention plate is inserted into the gap between the empty bobbin and the full bobbin. It is characterized by being configured to

As the multi-section link mechanism, any link mechanism having four or more sections can be selected and used depending on the space of the winding machine. The multi-joint link mechanism can be housed in a predetermined position by swinging any one link, or an end yarn entrapment prevention plate can be inserted between an empty bobbin and a full bobbin. An air cylinder device may be used to swing the one link.

However, it is not limited to this. The size of the end yarn entrainment prevention plate is such that when inserted between the empty bobbin and the full bobbin, it isolates the empty bobbin and the full bobbin in an area of 1/2 or more of the diameter of the empty bobbin. It would be good if it could be configured so that it can be done. In addition, if the multi-joint link mechanism is arranged so that the end yarn entrapment prevention plate can be inserted in the same direction as the rotational direction of the full bobbin itself, the innermost layer of the empty bobbin can be more reliably protected. preferable.

[For production]

In the thread attachment and end thread entrapment prevention device according to the present invention, the multi-joint link mechanism is folded into a compact shape during normal winding and bobbin switching, and does not come into contact with the full bobbin during winding and bobbin switching. stored in position. When threading is carried out, the multi-joint link mechanism is sometimes operated, and the end thread entrapment prevention plate extends into the gap between the empty bobbin and the full bobbin to protect the innermost layer of the empty bobbin from the end threads of the full bobbin. At this time, the end thread entrapment prevention plate is provided with a means for attaching the thread, so that when the thread is attached, that is, when the end thread is generated on the full bobbin, the end thread entrapment prevention plate is already inserted into the gap. This means that In addition, since it uses a multi-joint link mechanism that can be folded and stored, it is easy to install multiple end yarn entrapment prevention plates that are large enough to create a sufficient partition between the full bobbin and the empty bobbin. It will be attached to the joint linkage mechanism.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing an embodiment of the thread attaching and end thread entrapment prevention device of the present invention.

FIG. 1 shows a side view of a main part of a winding machine equipped with a thread attaching and end thread winding prevention device using a four-bar link mechanism as a multi-bar link mechanism. FIG. 1(A) shows normal winding, and the supplied yarn is transferred to the traverse cam 7 in the cam box 6.
It is wound onto a bobbin 3 (in this case, a full bobbin) via a touch roll 2 while being guided by. touch roll 2
and the direction of rotation of the bobbin 3 is indicated by an arrow. This winding machine is an automatic switching type winding machine, and the full bobbin 3 and the empty bobbin 4 are supported by bearings (not shown) at both ends of an arm 50 which is rotatably supported at the center point indicated by X in the figure. ) is located through.

Since automatic bobbin switching is a known mechanism, detailed explanation will be omitted.

A four-bar link mechanism 8 is installed in the cam box 6. The four-bar linkage mechanism 8 is operated during normal winding as shown in FIG. 1(A) and during bobbin switching work as shown in FIG. (rotating in the direction), it is stored in a folded state at the upper right position in the figure, and does not come into contact with the full bobbin 3.

In FIG. 1(C), where the full bobbin 3 and the empty bobbin 4 have completely swapped positions, the four-bar linkage mechanism 8 is activated and the end yarn entrapment prevention plate 9 moves the empty bobbin 4 and the full bobbin 3. inserted into the gap between the As shown in FIG. 2, the end yarn entanglement prevention plate 9 is provided with a figure 7-shaped thread guide groove 9a at its free end. The number of thread guide grooves 9a (two in FIG. 2) is provided in accordance with the number of heads of the winding machine. For example, in an eight-head winding machine, eight thread guide grooves 9a are provided to match the spacing between the heads. The fine adjustment guide 9 adjusts the width of the guide groove 9a depending on the type and thickness of yarn used.
Each thread b is attached to the guide groove 9a.

As shown in FIG. 1(C), when the end yarn entanglement prevention plate 9 is inserted into the gap between the empty bobbin 4 and the full bobbin 3, the yarn 1 is attached to the empty bobbin 4, and The yarn on the full bobbin 3 side is cut to generate an end yarn 10. This end thread 10 rotates together with the full bobbin 3 while fluttering until the rotation of the full bobbin 3 stops, but since the end thread entanglement prevention plate 9 has already been inserted, the end thread 10 is already wrapped around the thread 1. (The innermost layer of the empty tube bobbin 4 is protected.) Also, as shown in the figure, the length of the end yarn entanglement prevention plate 9 is 1/2 of the diameter of the empty tube bobbin 4. Since it is provided so as to be able to isolate the above, the above-mentioned protection can be sufficiently performed.

Next, the structure and operation of the four-bar link mechanism 8 will be explained with reference to FIG. 1 and FIG. 3 showing details of the four-bar link mechanism 8.

As shown in FIG. 1(A), the four-bar link mechanism 8 includes a drive link 11 fixed to a shaft 15 rotatably disposed on the side wall of the cam box 6, and a shaft 16 fixed to the side wall. This four-bar link mechanism 8 consists of a pivoted driven link 12 and a movable link 13 rotatably attached to the opposite end of the drive link 11 and driven link 12 via shafts 17 and 18. In this case, the side wall of the cam box 6 between the shafts 15 and 16 itself serves as a fixed link of the four-bar linkage 8.

As shown in detail in FIG. 3, the end yarn entrapment prevention plate 9 is attached to the lower surface of the movable link 13 via the intermediate member 14.
It is attached so as to extend from the end of 3.

An air cylinder device is used to drive the four-bar linkage. That is, the air cylinder casing 19 is swingably supported by a support bracket 23 fixed to the cam box 6 via a pin 23a. On the other hand, one end of the lever 24 is fixed to the shaft 15 to which the drive link 11 is fixed, and the other end of the lever 24 is connected by a knuckle joint 25 to the end of the piston 21 that slides within the air cylinder 20. Therefore, by operating the air cylinder device and sliding the piston 12 relative to the air cylinder 20, the lever 24 swings about the axis of the shaft 15, and the lever 24 and the drive link 11 are fixed to the shaft 15. Therefore, the drive link 11 also swings. Thus 4
The joint link mechanism 8 moves from the storage position shown by the dashed line in FIG. 3 to the position shown by the solid line where the end yarn entrapment prevention plate 9 extends horizontally.

〔Effect of the invention〕

Since the front end thread wrapping prevention device of the present invention is constructed as described above, the thread wrapping can reliably protect the innermost layer of the empty bobbin from damage caused by the end threads of the full bobbin during the thread wrapping operation. Can be done. In other words, the innermost fluff of the empty tube bobbin (
It is possible to reliably prevent end threads from hitting the thread being wound) and entanglement (a phenomenon in which end threads are caught between threads being wound). Since the protective area can be increased to 1/2 or more of the diameter of the empty tube bobbin, the protective effect can be increased. In addition, the prevention plate for end thread wrapping is moved using a multi-joint link mechanism, and can be folded when stored, so for compact storage space, the prevention plate for end thread wrapping can be enlarged to increase the protection area. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the operation of the embodiment of the present invention, where FIG. 1(A) is just before switching, FIG. 1(B) is during switching, and FIG.
C) shows the switching and threading immediately after. FIG. 2 is a front view of a portion of the protective plate provided with the V-shaped guide groove. FIG. 3 is a front view of the drive system that swings the link. Fourth
The figure is a front view of a conventional arc plate type innermost layer protection device, and FIG. 5 is a front view of a curved plate type innermost layer protection device. 1... Thread, 3... Full bobbin, 4...
・Empty tube bobbin, 8...4-bar link mechanism, 9...
End thread entanglement prevention plate, 9a... Guide groove for V-shaped thread attachment, 10... End thread, 11... Drive link, 12
...Driver link, 13...Movement link.

Claims (1)

[Claims] 1. Yarn for an automatic switching type winding machine, comprising a pair of winding bobbin shafts arranged via bearings at both ends of an arm rotatably supported at its center point. The device also includes a fixed link fixed to a machine stand of a winding machine, a movable link having an end yarn entanglement prevention plate extending from the end thereof, and It consists of a multi-articulated link mechanism consisting of at least two swing links that connect a link and a moving link,
A thread attaching means is provided at the free end of the end thread entrainment prevention plate, and the multi-joint link is placed at a position where it does not come into contact with the outer periphery of the winding bobbin during the winding operation of the winding machine and during the bobbin switching operation. The mechanism is arranged in such a way that the mechanism can be stored in a folded form, and the end thread entrapment prevention plate is inserted into the gap between the empty bobbin and the full bobbin when winding thread onto the empty bobbin. A thread attachment and end thread entanglement prevention device for an automatic switching type winder, characterized by comprising a knot link mechanism.