JPH024504B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for threading a yarn in a winding machine in a textile machine, and more specifically, a method for hooking a yarn being taken up by a yarn take-up device during doffing onto a moving guide member. The present invention relates to a threading method in which the thread is guided to the end of an empty bobbin being driven by the user, and is hooked onto a threading means provided at the end of the empty bobbin to restart winding.

Generally, in the fiber manufacturing process, such as the false twisting process that gives crimping to the fibers, a winder with multiple spindles arranged is used, and when the bobbin is full of winding yarn, dotting occurs. Each step of donning the empty bobbin after dotting is generally performed in the following steps.

That is, first, yarn is wound onto an empty bobbin, and the fully wound package, which has been wound continuously and a certain amount of yarn has been wound, is doffed, replaced with a new bobbin, and starts winding again. However, at this time, the yarn continuously supplied from the false twisting process is once transferred to the waist roller and wound up without stopping its supply. Then, while the yarn is being wound around the waist roller, the full package is doffed, then the empty bobbin is donned, and then the yarn temporarily wound around the waist roller is empty. The yarn is wound around the empty bobbin by pulling it toward the end of the bobbin, and then winding is restarted.

Conventionally, a threading method used in the above-mentioned fiber manufacturing process, that is, a threading method in which the yarn is drawn to the end of the empty bobbin and wound around the empty bobbin, is disclosed in Japanese Patent Application Laid-Open No. 55-1999. A technique disclosed in Japanese Patent No. 93778 is known.

In this threading method, as shown in Figures 7, 13 to 15 of the same publication, the thread path of the yarn is pre-arranged in a loop from the traverse fulcrum guide to the detour guide to the auxiliary take-up roller. Set the thread path to
From this loop-shaped detour thread path to the thread hanging guide,
The yarn is transferred to the hook of the empty bobbin by moving a guide or the like.

However, even in this threading method, even if the threading guide, the second guide, etc. do not form the threading path from the loop-shaped detour thread path, there is a limit to the moving speed of these threading guides. Since the yarn cannot be quickly transferred to the empty bobbin, there is a problem in that single yarn splits and single yarn breaks occur before the yarn is completely hooked on the hook of the empty bobbin, resulting in a lower threading success rate.

The purpose of the present invention is to solve the above-mentioned conventional problems,
After dotting a full bobbin, when threading a thread onto an empty bobbin, threading can be done quickly and reliably without causing single thread splitting or thread breakage.A thread threader with a high threading success rate. We are here to provide you with a method.

The configuration of the present invention to achieve this objective is as follows.

That is, (a) completing the doffing of the package cage on the cradle arm while temporarily taking over the yarn supplied during doffing to the yarn take-up device; and (b) then completing the donning of the empty bobbin. (c) After that, the thread being taken up by the thread take-up device is hooked onto the thread take-up guide by moving the thread take-up guide of the yarn transport device. , by the above-mentioned drive, guide the yarn to the vicinity of the end of the rotating empty bobbin, and (d) then, by further moving the thread-taking guide, the thread on the upstream side of the thread-taking guide of the guided thread is A thread threading method of a winding machine in which the thread is moved to a thread path where the thread is caught by a thread threading means provided at the end of a rotating empty bobbin, and the thread is wound around the rotating empty bobbin to resume winding. (a) When guiding the yarn in the above item (c) near the end of the empty bobbin, a yarn path regulating member is provided between the thread hooking means and the yarn take-up device, and the yarn path regulating member is (b) After temporarily detouring the thread with the tip of the member slightly outside of the thread path through the thread path regulating member, the thread is guided to the vicinity of the end of the rotating empty bobbin; When the thread of item (d) is hooked to the thread hooking means, the thread hooking guide is moved in the direction in which the thread moves toward the tip side of the thread path regulating member, thereby temporarily detouring the thread. The thread is moved toward the tip side of the thread mini regulation member and released from the member, and the release causes the thread that has been bypassed to be instantaneously moved to the thread guide. This is a method of threading the winder.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a sectional view showing an example of a winding machine for carrying out the method of the present invention, and FIG. 2 is a plan view of FIG. 1.

The basic structure of the winder 1 will be explained with reference to FIGS. 1 and 2.

The yarn Y processed in the false twisting process (not shown) etc. is attached to a swing fulcrum guide 2, a slide bar 3, and a traverse device 4.
The material is wound onto a bobbin B which is driven to rotate through frictional contact with a drive roller 5.

This winding machine 1 is normally configured with a large number of spindles arranged in the horizontal direction per stage, and furthermore, a plurality of upper and lower stages, and FIGS. 1 and 2 show one of these stages.

The swing fulcrum guide 2 is located on an extension of the stroke center of the traversing device 4, and is located on the step 6 or the front beam 11.
It is fixed on the front of the.

The slide bar 3 is provided on a fixed lower arm 7 extending from the frame of the winding machine ₁ via a bearing 8 so as to be slidable in the longitudinal axis direction. A collar 9 is fixed (Fig. 2).

The traverse device 4 traverses the traverse guide 10 using a known means such as a scroll cam.

FIG. 3 is a partial sectional view showing the structure of a yarn take-up device for winding the waist, and FIG. 4 is a plan view of FIG. 3.

In FIGS. 1 to 4, the yarn take-up device is located outside the traverse range of the yarn Y in the normal winding state, and is rotatably provided via a bearing 12 fixed to the front beam 11. On the shaft 13, a rotary cylinder is attached which is integrally constituted by an auxiliary winding section 17, a ratchet wheel 18, a waist pulley 19, a waist reservoir 20, and a flange 21 from the left.

The introduction guide 14 has a yarn restraining part 14' on the upper part, one end is fixed to the bearing 12, and the other end extends to the front surface of the waist pulley 19.

The winding position guide 16 extends rearward from the upper part along the outer peripheral surface of the waist pulley 19 and is attached to the front beam 11. Further, the guide surface for the yarn Y of the winding position guide 16 has an inclined surface where the opening of the introduction section at the front is wide and becomes narrower as it extends rearward.

One end of the elbow guide 15 is fixed to the bearing 12, and the other end is provided at a position that serves as an introduction guide in the thread path when threading.

FIG. 5 shows a plan view of the thread conveying device, and FIG. 6 shows a side view of FIG. 5. 5A to 5E are plan views for explaining the threading operation, and FIGS. 6A to 6E are side views of FIGS. 5A to 5E. FIG. 7 is a front view illustrating the driving of the threading guide, FIG. 8 is a front view showing the relationship between the empty bobbin and the threading guide, and FIG. 9 is a side view showing the mounting state of the positioning fitting.

The configuration of the threading device will be explained with reference to FIGS. 5 to 9.

In FIG. 7, the threading guide 31 is attached to a roller chain 33 via a guide holder 32, and the roller chain 33 is loosely inserted with a square pipe 34 as a sheath.

The square pipe 34 has one end fixed to the front beam 11 with a fastener 39a so that the thread hooking guide 31 (see FIGS. 3 to 5) is located at an intermediate position between the introduction guide 14 and the waist pulley 19. In addition, the arrangement path includes the waist pulley 19, traverse device 4, and drive roller 5 as shown in FIGS. 6, 7, and 9.
It has a slightly downwardly curved portion 34a that bypasses the upper part of the drive roller 5 and past the narrow part of the drive roller 5 and the cradle arm 44R (see FIG. 9);
It bends along the outer periphery of a sprocket 36 that is integrally attached to the drive shaft 35 via a split fitting 37, and the other end is fixed to the rear lower beam 88 with a fastener 39d (see FIG. 1).

Therefore, these roller chain 33, square pipe 34, stopper 39a, curved portion 34a, drive shaft 3
5, split clamp 37, sprocket 36, stopper 3
9d constitutes a guide member of the thread hooking guide 31.

The square pipe 34 is provided with slits 3 in a part necessary for engagement between the sprocket 36 and the roller chain 33 and in a part necessary for movement of the thread hooking guide 31.
4', 34'' (see FIGS. 7 and 8), and as the sprocket 36 rotates, the thread hooking guide 31 moves from the position of the introduction guide 14 to the drive roller 5 along the curvature of the square pipe 34. The roller chain 33 reciprocates from the upper curved point to the end point slightly ahead (see Fig. 6), and the other end of the roller chain 33 is a square pipe 3 fixed to the sprocket 36 and the lower rear beam 88.
I am going back and forth within 4.

The positioning fitting 40 (see FIGS. 8 and 9) is attached to the curved portion 34a of the square pipe 34 via the slider 38 with fasteners 39b and 39c. It is supported by being brought into contact with a portion of the side surface and the bottom surface where the center portion of the bobbin bearing portion 29R is located.

In FIGS. 5 and 6, the timing guide 28, which is a thread path regulating member, is connected to the cradle arm 4.
It is fixed downward on the front inner surface of 4R, and the tip of this guide is caught when the yarn Y ₇ is transported by the thread hooking guide 31 (see Figures 5a and 6a), In FIGS. 5b and 6b), the height is set so that the thread can be removed, and the threading guide 31 is placed at a position that avoids interference.

Note that, as shown in FIGS. 5b and 6b, the thread-hanging thread path is at a position where the traveling thread is off the tip of the timing guide 28 and is caught on the ratchet wheel 30 (see FIG. 6). This is the thread path where the thread is wound around the empty bobbin.

The thread hooking cutter 41 is attached to the upper part of the cradle arm 44R, and the folded portion at the tip of the cutter holder 43 that holds the cutter forms a guide piece 42, between which the thread hooking cutter 41 is attached. The bobbin bearing 29R and the thread hook cutter 41 are fixed in a non-contact state.

Next, specific steps of the threading method according to the present invention will be explained.

In FIGS. 1 and 2, when a certain amount of yarn Y supplied from the false twisting process etc. is wound onto bobbin B of winding machine 1, the yarn transfer operation of yarn Y is started, and the yarn As the slide bar 3 moves laterally, the thread Y becomes a thread path for the thread Y through the thread shifting collar 9, and the thread Y is temporarily taken over by the waist pulley 19. The thread transfer process is followed by dotting, donning, and threading processes, that is, dotting the package P,
While donning the empty bobbin B ₁ , the yarn Y that is continuously supplied is transferred to the fulcrum guide 2, the slide bar 3, the introduction guide 14, and the winding guide 2, as shown in FIGS. 2, 5, and 6. It is taken over by a waist pulley 19 via a position guide 16. Next, in FIG. 1, when the shaft 35 is driven clockwise, the roller chain 33 inserted into the square pipe 34 is driven via the sprocket 36, and one end of the roller chain 33 is connected via the guide holder 32. The attached yarn hooking guide 31 scoops up the yarn Y ₆ traveling between the introduction guide 14 and the winding position guide 16, and transfers the yarn Y ₆ along the curved path of the square pipe 34 set in advance to the cradle arm. 44 to the end face of the empty bobbin B.

To explain in more detail the process of moving the thread _Y6 , in Figs. 5 and 6, the thread hooking guide 3
1 starts moving toward bobbin B from the return position at point J, and scoops up yarn Y ₆ at point K. In the process of reaching point L, the yarn that has hit the restraint part of the introduction guide 14
_Y6 is released and becomes a thread path that directly reaches the threading guide 31 from the slide bar 3. When the threading guide 31 moves further and reaches point M, the wrapping angle of the thread Y around the threading guide becomes 90 degrees or more, and this wrapping angle increases as the threading guide 31 moves.

At this time, the downstream yarn Y taken up via the threading guide 31 becomes a yarn path that is taken up directly onto the waist pulley 19 via the winding position guide 16. Therefore, the yarn tension moves in a direction that gradually decreases.
However, the change in the thread path length due to the movement of the thread hooking guide 31 is such that the thread path length gradually becomes longer, and if the circumferential speed is set so that these two factors cancel each other out, there will be no thread slack.

The thread hooking guide 31 moves further and passes outside the timing guide 28 provided on the cradle arm 44R, and when it reaches point N, it becomes the thread path of the thread _Y7 shown in FIGS. 5a and 6a. That is, it passes through the swing fulcrum guide 2, slide bar 3, guard 27, timing guide 28, reaches the threading guide 31, and then reaches about
A 180-degree U-turn is made to take the thread through the elbow guide 15, the winding position guide 16, and the waist pulley 19.

At the position where the threading guide 31 reaches the point N, the drive shaft 35 of the roller chain 33 is temporarily stopped to wait until the tension of the running thread Y becomes stable.

Next, between point N and point N, the square pipe 34 is curved downward, and while the threading guide 31 moves along this curvature and reaches the point, the thread Y ₇ is moved to the tip of the timing guide 28. The upstream yarn Y ₇ that is moved to the side and hung on the thread hooking guide 31 is at the tip (released end) of the timing guide 28, which is a thread path regulating member.
The thread path, which had been bent until now, is now guard 2.
7 to the threading guide 31, the thread instantaneously becomes a straight line due to the thread tension (see FIGS. _5b and 6b). This thread path _Y8 is a thread path sufficient for threading, that is, a threading thread path, and the thread _Y8 is caught by the rotation of the ratchet wheel 30, which is a threading means provided on the flange of the bobbin bearing. , is wound around bobbin B.

The behavior of the yarn Y ₈ immediately before threading is such that even when there is no timing guide 28 like in the conventional threading method and device, the threading guide 31 is at point N (see Figure 6a). When reaching , yarn Y ₈ moves to ratchet wheel 3.
It becomes stuck at 0. However, because threading is carried out at a slow speed from a thread path that is not suitable for threading,
Multifilament yarns have problems such as single yarn splitting and associated yarn breakage, which can lead to yarn threading failures. In the present invention, a timing guide 28 is provided to prevent this drawback.
The structure is such that the multifilament is completely bitten into the ratchet wheel 30 at once when _Y8 comes off the timing guide.

Thread threading by this threading guide 31 is carried out below the ratchet wheel 30, and the rotating direction of the ratchet wheel 30 and the traveling direction of the yarn _Y8 are in the forward direction. this,
The so-called lower hanging method uses the yarn upstream from the ratchet wheel 30.
It has a feature that allows threading on _Y8 without causing the thread to become loose. Furthermore, when the yarn _Y8 comes off the timing guide 28, the yarn path is from the curved yarn path from the guard 27, through the timing guide 28, to the threading guide 31 (see Figures 5a and 6a). , since the thread path is straight from the guard 27 directly to the thread hooking guide 31 (see Figures 5a and 6b),
The thread paths in both routes are geometrically shorter in the latter. This behavior lowers the thread tension of yarn _Y8 and increases the threading success rate, so it is preferable to lower the tension just before threading as much as possible. Further, the threading guide 31 temporarily stops the drive shaft 35 of the roller chain 33 at the position where the threading guide 31 reaches the point N,
This waits for tension adjustment, but as mentioned above, if the peripheral velocity of the take-up on the waist pulley 19 when threading is selected at a take-up position where the tension is low, when the thread take-up guide 31 is stopped, the upstream thread The amount of slack in row _Y8 increases in proportion to the stop time. Therefore, by waiting for tension adjustment for 0.5 seconds to 2 seconds, it is possible to select the appropriate tension for threading for any type of yarn. Note that it is desirable that this temporary stop of the drive shaft can be easily and variably set in advance using a timer or the like.

Further, one of the causes of thread threading failure is often due to poor relative positioning of the ratchet wheel 30 and thread threading guide 31. Furthermore, in the case of a structure in which a bearing having a ratchet wheel 30 is attached to a cradle arm 44R that has a degree of freedom for opening and closing operations, this may be caused by variations in the length of the empty bobbin B or crushing of the end face of the bobbin. The ratchet wheel 30 is due to poor engagement between the empty bobbin and the bobbin bearing 29.
This made the position of the thread unstable, which affected the success rate of thread threading.

In addition, other inconveniences include failure to attach the bobbin B to the cradle arm 44 and the failure of the square pipe 34.
If the position of the thread hook guide 31 is incorrect, the ratchet wheel 30
This may cause contact or interference with the cradle arm 44R, resulting in malfunction or return failure.

The slider 38 and the positioning fitting 40 are provided to eliminate the above-mentioned troubles, and as shown in FIGS. Fastener 39
b, 39c, and the thread hooking guide 3
The end face extending to 1 is arranged so that the guide holder 32 can slide thereon, and the height of the threading guide 31 is maintained at an appropriate level.

The positioning metal fitting 40 is fixed to the slider 38, and the positioning metal fitting simultaneously contacts the bottom and side surfaces of the bobbin bearing center portion of the cradle arm 44R, and the ratchet wheel 30
The thread guide 31 and the thread guide 31 are designed to always maintain an optimal space, and even if there is a disturbance such as the length or shortness of the bobbin B or improper installation, the positioning is performed based on the cradle arm 44R, and the ratchet wheel 30 and the thread guide 31 are will maintain a relatively constant positional relationship.

Next, the yarn _Y8 hung on the ratchet wheel 30 is attached to the bobbin B.
passes under the bobbin B while being held between the drive rollers 5, as shown in FIGS. 5e and 6e.
When the bobbin B is wound 270 degrees from the back to the top,
Thread cutter 4 fixed to cradle arm 44R
The yarn on the downstream side caught on the ratchet wheel 30 is introduced into the thread 1 via the guide piece 42, and then cut. The cut end of the yarn on the downstream side is wound around the waist pulley 19, and the other end of the yarn on the upstream side is wound around the bobbin B via the ratchet wheel 30.

That is, as shown in FIGS. 5c and 6c, when the yarn _Y8 is caught on the ratchet wheel 30 and rotated about 90 degrees, the yarn _Y8 is caught on the pawl 30a of the ratchet wheel. The waist pulley is slipping on the 19 side. As shown in FIGS. 5 d and 6 d, the situation is similar to the above when the yarn Y ₈ is rotated 180 degrees from the position where it is hooked on the ratchet wheel 30, and the yarn Y ₈ is still cut. Not done. Next, as shown in FIGS. 5e and 6e, when the thread is rotated 270 degrees from the threading position, the thread from the ratchet wheel 30 to the waist pulley 19 is guided by the threading cutter 41. It will be cut off. At this time, the thread between the pawl 30a of the ratchet wheel and the thread hooking cutter 41 becomes a folded part of the thread to further ensure thread threading.

When the yarn Y ₈ is caught on the ratchet wheel 30 and the winding angle exceeds a predetermined value, the thread hook cutter 41 applies a pulling force to the bobbin B side and a pulling force to the waist pulley 19 on the other side. As a result, the thread tension increases, and the guide piece 4
The biting depth between 2 and thread hook cutter 41 gradually increases so that the thread can be easily cut.

Therefore, the characteristics are that the tension during cutting does not increase abnormally and that the cutting point of yarn Y is always at a constant position, which improves the threading success rate and
This effect is effective in preventing yarn from getting entangled in the bobbin bearing 29, and this effect becomes more pronounced the thicker the product.

If the thread hook cutter 41 were not provided, the yarn Y hooked on the ratchet wheel 30 would be pulled toward both the empty bobbin B side and the waist pulley 19, as described above. Yarn Y connected to empty bobbin B side is empty bobbin B
No strong tension is generated after the wire is wrapped around the wire.
However, the yarn Y on the side wound around the waist pulley 19 is pulled by the length of the winding due to the rotation of the ratchet wheel 30 and the length of the winding due to the rotation of the waist pulley 19, causing a sudden increase in tension. Eventually it is severed. This cutting position is not always constant. If the thread breaks near the ratchet wheel 30, threading failure will occur. In addition, in the case of thick yarn, the rotation of the empty bobbin B is temporarily stopped, causing the supplied yarn Y to become slack, which causes threading failure. If the yarn end length is always constant and the thread is cut with low tension by the threading cutter 41, the above-mentioned concerns can be eliminated and the success rate of threading can be dramatically improved.

As described above, the present invention temporarily detours the thread guide by means of the thread guide regulation member provided upstream of the thread guide ratchet, and the yarn is transferred from the detour thread guide to the tip of the timing guide. Since the thread is instantly released to the thread thread path by removing it from the thread thread, the thread is quickly and reliably fed into the thread threading means, and the success rate of thread threading on the thread threading means is increased. It has the excellent effect of dramatically improving the yarn breakage and reducing the problems of single yarn splitting and yarn breakage, which were problems in the past.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a winding machine for carrying out the method of the present invention, and FIG. 2 is a plan view of FIG. 1. FIG. 3 is a partial sectional view showing the structure of a yarn take-up device for winding the waist, and FIG. 4 is a plan view of FIG. 3. FIG. 5 shows a plan view of the thread conveying device, and FIG. 6 shows a side view of FIG. 5. Figure 5 a~
6e is a plan view for explaining the threading operation, and FIGS. 6a to 6e are side views of FIGS. 5a to 5e. 7th
The figure is a front view illustrating the drive of the threading guide, FIG. 8 is a front view showing the relationship between the bobbin and the threading guide, and FIG.
The figure is a side view showing the mounting position of the positioning fitting. DESCRIPTION OF SYMBOLS 1... Winder, 2... Swing point guide, 3... Slide bar, 4... Traverse device, 5... Drive roller, 10... Traverse guide, 13... Shaft, 14...
Introduction guide, 16... winding position guide, 19... waist pulley, 20... waist reservoir, 21... flange, 27... guard, 28... timing guide, 29... bobbin bearing, 30... ratchet wheel, 31
...Threading guide, 32...Guide holder, 33...
...Roller chain, 34...Square pipe, 35...
Drive shaft, 36... Sprocket, 37... Split fitting, 38... Slider, 39... Stop fitting, 40...
...Positioning bracket, 41... Thread hook cutter, 42... Guide piece, 43... Cutter holder, 44... Cradle arm.

Claims (1)

[Scope of Claims] 1 (a) Complete the doffing of the package on the cradle arm while temporarily taking up the yarn supplied during doffing to the yarn take-up device; (b) Next, After completing the bobbin donning, the empty bobbin is driven; (d) Then, the guided yarn on the upstream side of the threading guide is further passed through the threading guide. A winding machine that moves the yarn to a thread path where the yarn is caught by a thread hooking means provided at the end of the rotating empty bobbin, winds the yarn around the rotating empty bobbin, and resumes winding. In the threading method of (a) above, when guiding the thread in the vicinity of the end of the empty bobbin, a thread path regulating member is provided between the thread threading means and the thread take-up device. At the same time, the yarn with the tip of the yarn path regulating member slightly outside the thread passing path is temporarily detoured through the yarn path regulating member, and then placed near the end of the rotating empty bobbin. (b) When the thread of item (d) above is hooked on the thread hooking means, by moving the thread hooking guide in a direction in which the thread moves toward the tip side of the thread path regulating member, The temporarily detoured yarn is moved to the tip side of the yarn path regulating member and released from the member, and as a result of the release, the yarn that has been detoured is instantaneously transferred to the thread thread path. A method for threading a winding machine, which is characterized by moving the thread.