JPH0274636A - Tail yarn holding apparatus of fine spinning frame or such - Google Patents

Abstract

PURPOSE:To reduce the space necessary for the setting of a yarn-holding means for holding and releasing a tail yarn extending from a doffed full bobbin to a spindle by attaching the holding means to a separator between the spindles. CONSTITUTION:A yarn 11 is wound under twisting to a bobbin A attached to a spindle 4 until the bobbin becomes full-bobbin, when the full bobbins are extracted by a simultaneous doffer and empty bobbins are attached to the spindles 4. In the above operation, the tail yarn extending from the full bobbin A to the spindle 4 are temporarily held with a yarn-holding means 30 attached to a separator 7 placed between the spindles.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a tail thread gripping device in a spinning machine such as a ring spinning machine, a yarn twisting machine, etc. (hereinafter referred to as spinning machine, etc.) equipped with a simultaneous pipe change device.

Conventional technology When changing all at once on a spinning machine such as a spinning machine, if there is residual yarn on the spindle, it will take a lot of manpower to dispose of the residual yarn, so it is necessary to replace the yarn without causing any residual yarn on the spindle. For example, the method is disclosed in JP-A-60-126334 and JP-A-60.
It is disclosed in the publication No.-161174. In these changing methods, a thread hooking device made of a ring-shaped raised cloth is provided in the middle of the spindle, and by pulling out the full bobbin from above the spindle, the end of the full bobbin is wound around the spindle in a loop shape. The loop-shaped end thread is caught and held by a thread hooking tool, and then the end thread connected between the full bobbin and the spindle is cut by a cutting device. However, with the above-mentioned device that holds the tail thread by hooking it onto a thread hook provided on the spindle, when a full bobbin is pulled out, residual thread remains on the thread hook, reducing the thread holding ability. It takes manpower to remove the remaining thread, and the fit between the spindle and bobbin becomes unstable, making the tube exchange operation unstable. Also, since the tail thread is held passively, it becomes difficult to cut the tail thread. There was a problem in that the tail thread slipped on the spindle due to the force exerted by the machine, and the cut end of the tail thread could no longer be held between the spindle and the empty bobbin that was newly inserted into the spindle, resulting in thread breakage when the machine was restarted. 6. Therefore, in order to solve the above-mentioned problems, conventionally, as disclosed in Japanese Patent Application Laid-Open No. 61-258035, there is a standby position below the spindle rail and an operating position in front of the spindle at the front of one machine. It has been proposed that a storage frame that is reciprocally driven is provided in the storage frame, and the storage frame is provided with a gripping mechanism that can grip and release the tail string, and a cutting mechanism that can cut the tail string.

Problems to be Solved by the Invention In the device described in the above publication, the gripping mechanism can actively grip the tail string to prevent the tail string from slipping off the spindle, but one machine has a standby position in front of the machine. Since a storage frame that is reciprocated by a swinging member is installed at the operating position, a large space is required in front of the machine to grasp the tail thread, and it is difficult to replace the thread or join the thread in the event of thread breakage. This obstructs operation, and the device for gripping the tail string is large and complicated, making assembly and maintenance troublesome.The present invention aims to solve these problems. This is a challenge.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention combines a full bobbin attached to a spindle and an empty bobbin inserted into a peg of a yarn conveying device disposed in front of the machine stand. In spinning machines, etc. equipped with a simultaneous tube changing device that exchanges tubes all at once, each separator is equipped with thread gripping means that can grip and release the tail thread connected between the spindle and the full bobbin doffed in front of the spindle. It is characterized in that it is provided with a drive device that operates the thread gripping means in conjunction with the tube exchange operation.

When a full bobbin inserted into the spindle is pulled out by the simultaneous tube changing device and moved to the front of the spindle, the end thread of the full bobbin is wound around the spindle in a loop shape and is wound around the middle part of the height of the spindle. The yarn is transferred from the vicinity to the front full bobbin, and in this state, the thread gripping means provided on each separator is operated by the drive device to actively grip the end thread between the spindle and the full bobbin. Therefore, by cutting the tail thread while holding it by the thread gripping means, and then inserting a new empty bobbin into the spindle, the tail thread wound on the spindle can be securely placed between the empty bobbin and the spindle. It can be held between In addition, since each separator is provided with a thread gripping means, it is easy to assemble and maintain the thread gripping means integrally with the separator, and the thread gripping means can be arranged between the separators or within the separator, making the device more compact. .

Embodiment First, a generally known spinning frame 1 equipped with a simultaneous tube change device will be explained with reference to FIG. In Figure 2, 2 is the frame of the spinning machine, 3 is the spindle rail, 4 is the spindle, and 5 is the spindle rail.
is a ring rail, 6 is a ring guiding the traveler 6a, 7 is a synthetic resin separator, 8 is a draft roller, 9 is a lappet angle, 10 is a yarn guide, and the spindle 4 has a full bobbin A. inserted, trough 1-
The yarn 11 spun from the roller 8 passes through the yarn guides 10 and 1.
- Connected to full bobbin A via labeler 6a.

Reference numeral 12 denotes a yarn conveying device disposed below the spindle rail 3, which includes a guide rail 14 attached to the machine base 2, a spindle It is composed of a large number of peg trays 15 movably placed in a line so as to have the same pitch as the pitch, and a moving means (not shown) for moving the peg trays 15.Empty bobbins B are inserted into the pegs 15a of the peg trays 15. It is worn. A peg 16 is fixed to the guide rail 14 at a position corresponding to each spindle 4. Further, 17 is a simultaneous tube changing device that simultaneously exchanges the full bobbin A inserted into the spindle 4 and the empty bobbin B inserted into the peg 15a.
As shown in Japanese Patent Publication No. 51-24008, there is a changing bar 19 having a tube gripper 18 corresponding to each spindle 4, and a Scotto-Rasse type strict straight line for vertically moving the changing bar 19 in parallel. It is composed of a vertical movement mechanism 20 that applies a motion mechanism and a longitudinal movement mechanism 21 that moves the vertical movement mechanism 20 in parallel in the front and rear direction. It has been made compact and accommodated in the The above-mentioned simultaneous changing device 17 first advances, lowers, retreats, and lowers the changing parr 19 to grasp and pull out the empty bobbin B inserted into the peg 1.5a, and then removes the empty bobbin. Keep B at peg 16
After that, the changing bar 19 is advanced, raised, retreated, and lowered to grasp and pull out the full bobbin A inserted into the spindle 4.
Doff to the front of the bobbin, then lower it and insert it into the peg 15a, then grip the empty bobbin B inserted into the peg 16 and pull it out, then raise it and insert it into the spindle 4.
It is designed to be inserted into the Also, 23 is the spindle 4
This is a tail thread cutting device for cutting the tail thread 24 (see Fig. 9) connected between the full bobbin A doffed forward and the spindle 4, and is disclosed in JP-A-60-81337. A pair of upper and lower rotary blades 26.2 overlapping each other is mounted on the traveling body 25, which is movably arranged along the spindle rail 3 so that the blades 26.2
7 is attached so that when the running body 25 runs during doffing, the tail yarn 24 is cut by the rotary blades 26 and 27.

Next, the tail thread gripping device 30 incorporated into the spinning frame 1 with the simultaneous tube changing device as described above will be explained based on FIGS. 1 and 3 to 6. In this tail thread gripping device 30, 31 is capable of grasping and releasing the tail thread 24 connected between the spindle 4 and the full bobbin A doffed toward the front of the spindle 4 by each separator 7 on the left side facing the machine base 2. thread gripping means provided in the
Reference numeral 32 designates a drive device that operates the gripping means 31 in conjunction with the pipe replacement operation of the simultaneous pipe replacement 17.

In the gripping means 31, 33 is a housing groove formed on the front side surface of the separator 7, and 35 is a horizontal groove formed on the separator 7 between the lower end of the housing groove 33 and the notch 34 provided on the rear side of the separator tuff. The support hole 36 in the direction is an insertion groove formed on the front side surface of the separator 7 so as to be located on an extension line of the support hole 35. The accommodation groove 33 is located in front of the groove bobbin A inserted into the spindle 4, and the support hole 35 is located in front of the groove bobbin A inserted into the spindle 4, and the support hole 35 is located in front of the spindle 4 when the ring rail 5 is lowered to the lowered position for doffing, as shown in FIG. It is located near mid-height. Further, 37 is a support shaft rotatably inserted into the support hole 35 through the insertion groove 36, and 38 is the support shaft 3.
A thread gripping lever is integrally provided at one end of the thread gripping lever so as to be perpendicular to the support shaft 37, and when it is rotated upward as shown in FIG. They are arranged so that they are in contact with the bottom surface of the housing groove 33 along the entire length thereof. The thread gripping lever 38 is formed to have a length slightly shorter than the distance between the separators 7, and is inserted into the spindle 4 when turned sideways as shown by the imaginary lines in FIGS. 3 and 4. It is arranged so that it crosses the front of the fully loaded bobbin A.

In the drive device 32 described above, 40 is an air cylinder built into the rear part of the separator 7, and a cylinder body 41 formed integrally with the separator 7.

It is composed of a cap 42 fixed to the cylinder body 41, a piston 43 and a return spring 44 fitted in the cylinder body 41, and a piston rod 45 integrally connected to the piston 43. One end of an air supply and discharge hose 46 is connected to the cylinder body 41, and the air supply and discharge hose 46
The other end is an air supply pipe 4 arranged along the ring rail 5.
It is connected to 7. The air supply/discharge 947 is connected to an air supply source (not shown) via a switching valve operated by a control device. The piston rod 45 projects into the notch 34, and its tip end is connected to an arm 48 fixed to the other end of the support shaft 37 via a connecting rod 49. Normally, the return spring 44 causes the thread gripping lever 38 to be directed upward. When the cylinder body 41 is supplied with air, the piston rod 45 protrudes and rotates the thread gripping lever 38 horizontally by approximately 90 degrees. It's like letting them do it.

In the above structure, when the bobbin inserted into the spindle 4 becomes full bobbin A during the spinning operation of the spinning frame 1, the ring rail 5 descends as shown in FIG. 1 to produce the spun yarn. 11 is wound around the lower end of the bobbin to form a bottom punch, and then the spinning operation is stopped. On the other hand, before the bobbins inserted into the spindle 4 become full bobbins A, the changing bar 19 of the simultaneous changing device 17 is moved and the empty bobbins B inserted into the pegs 15a are deposited. Insert into peg 16. When the spinning operation is stopped, air is supplied to the air supply pipe 47 of the tail thread gripping device 30, and thereby the piston rod 45 of each air cylinder 40 is
is projected against the spring force of the return spring 44 and rotates the thread gripping lever 38 downward approximately 90 degrees. As a result, the thread gripping lever 38 is positioned approximately horizontally in front of the full bobbin A near the middle height, as shown in FIGS. 7(A) and 8(a).

In this state, the changing lever 19 of the simultaneous changing device 17 is moved to pull out the full bobbin 8 inserted into the spindle 4, and the full bobbin A is removed in FIGS. 7 (B) and 8 ( b),
As shown in FIG. 9, it is doffed to the front position of the spindle 4 and temporarily held at that position. Due to the doffing of the full bobbin A, the tail thread 24 of the full bobbin A is wound around the spindle 4 in a loop shape, and then is pulled out across the upper part of the thread gripping lever 38. Next, the supply of air to the air supply/discharge pipe 47 is stopped and switched to the discharge side, thereby causing the piston rod 45 of each air cylinder 40 to return to the spring 44.
The thread gripping lever 38 is retracted and rotated upward. As a result, the thread gripping lever 38 is moved as shown in FIG.
C), Figure 8(C).

As shown in FIG. 9, the tail thread 24, which is in elastic contact with the floor surface of the storage groove 33 of the separator 7 and is connected between the 1gJ bobbin A and the spindle 4, is placed between the thread gripping lever 38 and the separator 7. grasp. In addition, in the case of a hill, since the spun yarn 11 is guided in one direction from the traveler 68, there is no risk of it being caught by the yarn gripping lever 38. Thereafter, the running body 25 of the tail thread cutting device 23 runs along the spindle rail 3, and as shown in FIG. 7(D) and FIG. However, since the tail thread 24 on the spindle 4 side is held between the thread gripping lever 38 and the separator 7, the tail thread 24 wound around the spindle 4 is cut off. After that, the changing bar 19 of the simultaneous changing device 17 is lowered and the full bobbin A is inserted into the peg 15a, and the empty bobbin B inserted into the peg 16 is then deposited. Pull it out and insert it into the spindle 4.

When inserting the empty bobbin B into the spindle 4, the lower end of the empty bobbin B pushes down the tail thread 24 connected between the thread gripping lever 38 and the spindle 4 to bow the tail thread 2.
4 is pulled out from between the thread gripping lever 38 and the separator 7, and the empty bobbin B securely sandwiches the tail thread 24 wound around the spindle 4 in a loop shape between the spindle 4 and the empty bobbin B. When inserting the empty bobbin B into the spindle 4, air is supplied to the air supply pipe 47 immediately before or near the time when the empty bobbin B pushes down the tail thread 24 between the thread gripping lever 38 and the spindle 4. Alternatively, the gripping of the tail thread 24 by the thread gripping lever 38 may be actively released by temporarily supplying it. Thereafter, the spinning operation is automatically started again, and the spun yarn 11 is securely inserted into the empty bobbin B inserted into the spindle 4. Next, the tail yarn gripping device having the above-mentioned structure is placed at 30. Since most of the gripping mechanism 31 and drive device 32 are incorporated into each separator 7, most of the tail thread gripping device 30 can be assembled or replaced by assembling or replacing the separator tuff during assembly or maintenance. and maintenance can be completed.

In addition, during normal spinning operation, the yarn gripping means 31 is housed inside the separator 7 to prevent obstacles from protruding from the side of the separator 7, so that during the spinning operation, the function of the separator tuff is not changed from the conventional one. It can be fully utilized in the same way as a separator. Furthermore, since the yarn gripping means 31 is housed in the separator 7 as described above, even if yarn breaks for some reason during spinning operation, the splicing operation of the broken yarn will not be hindered in any way. , Easy thread splicing operation.

1 and 0 show different examples of the present application, in which a thread gripping lever ~38e is pivotally attached to the front end surface of the separator 7e via a support shaft 37e, and an arm 48s fixed to each support shaft 37e is connected to an air cylinder 40e. Operation bar 8 reciprocated by Q
(,,: The husband and husband are connected via the connecting rod 40f3. When the air cylinder 40e moves the operating bar 80 to the right end, each thread gripping lever 38e is rotated sideways as shown by the imaginary line. .

Furthermore, when the operation bar 80 is moved to the left end, each thread gripping lever 38e is rotated upward as shown by the solid line, and the tail thread is gripped between the thread gripping lever 38e and the front end surface of the separator 7e. It is.

The air cylinder 40e has one thread gripping lever 3 for all spindles.
8e may be activated, or air cylinder 4
0e may be arranged in groups for each of a plurality of spindles, and each air cylinder 40e may actuate the thread gripping lever 38e of the corresponding group. In this example and the example shown next, the same or equivalent components as in the above example will be given the same reference numerals as the corresponding parts in the above example with the letters e and f, and redundant explanation will be omitted. .

FIG. 11 shows another different example of the present application, in which a pair of thread gripping levers 38af and 38bf are pivotally connected to the separator 7f via support shafts 37a f and 37bf, and the separator 7f
An air cylinder 40f is attached to the rear side, and both support shafts 37a
f, arms 48af and 48b fixed to 37bf
are connected to a connecting arm 45af fixed to a piston rod 45f of an air cylinder 40f via connecting rods 49af and 4.9bf, respectively. When the piston rod 45f of the air cylinder 40af moves to the rising end, the pair of thread gripping levers 38af and 38bf are rotated upward and downward, respectively, as shown by imaginary lines, and the piston rod 4
When 5f moves to the lower end, a pair of thread gripping levers 38af
, 38bf are turned sideways so that they come into contact with each other, and the tail thread 24 is moved between both thread gripping levers 38af and 38bf.
Try to grasp f.

Note that the tail thread gripping device of the present application is not limited to the above-mentioned spinning machine equipped with a simultaneous pipe change device, but may be implemented in various types of spinning machines equipped with a simultaneous pipe change device. Further, the tail thread cutting device is not limited to a traveling type, and may be configured with a fixed blade or a movable blade arranged on a ring rail or a separator, and the tail thread gripping device of the present application has a configuration of the tail thread cutting device. It is not limited. Further, as the drive device, a solenoid operated by electricity may be used.

As described above, in the present invention, each separator is provided with gripping means capable of gripping and releasing the tail string, and these gripping means are operated by a drive device in conjunction with the pipe exchange operation. Therefore, the end thread connected between the spindle and the full bobbin doffed toward the front of the spindle can be actively grasped, preventing the end thread from slipping off the spindle when the end thread is cut, and preventing thread breakage when restarting. In addition, it is possible to prevent residual yarn from remaining on the spindle, saving the trouble of removing residual yarn from the spindle, and it is possible to always maintain a constant degree of engagement between the spindle and bobbin, thereby stabilizing the tube exchange operation. can. Furthermore, even if the tail thread can be positively gripped as described above, since each separator is provided with a thread gripping means, the thread gripping means can be assembled together with the separator, or the thread gripping means can be assembled integrally with the separator during maintenance. It can be replaced, making assembly and maintenance easy, and the thread gripping means can be placed between the separators or within the separator, making the device simple and compact, and preventing it from interfering with pipe changing operations and thread splicing operations. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a cross-sectional view of a spinning frame showing the spindle portion, FIG. 4 is a plan view of FIG. 3, FIG. 5 is an enlarged view of the arrow V in FIG. 1, and FIG. 6 is an enlarged view of the arrow ■ in FIG. An enlarged view, FIG. 7 is a front view showing the operation in the order of (A) to (D), and FIG. 8 is a plan view showing the operation in the order of (a) to (d).
FIG. 9 is a sectional view showing the operation, FIG. 10 is a plan view showing a different example, and FIG. 11 is a perspective view showing another different example. 1...Spinning machine, 4...Spindle, A...Full bobbin. B... Empty bobbin, 7... Separator, 12... Tube yarn conveyance device, 17... Simultaneous change device, 30... Tail thread gripping device, 31... Yarn gripping means, 32 ...Drive device patent applicant Howa Kogyo Co., Ltd. Fuegozu

Claims (1)

[Claims] 1. In spinning machines, etc., equipped with a simultaneous tube changing device that simultaneously exchanges full bobbins attached to the spindle and empty bobbins inserted in the pegs of the yarn conveying device installed at the front of the machine. , grasp the tail thread connected between the spindle and the full bobbin doffed to the front of the spindle on each separator,
A tail thread gripping device for a spinning machine or the like, comprising releasable thread gripping means and a drive device for operating the thread gripping means in conjunction with a tube change operation.