JPH0742627B2 - Bottom thread gripping device for spinning machine etc. - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tail yarn gripping device in a spinning machine such as a ring spinning machine, a twisting machine or the like (hereinafter referred to as a spinning machine) equipped with a simultaneous pipe changing device.

2. Description of the Related Art When performing simultaneous conversion on a spinning machine such as a spinning machine, if a tail yarn residual thread is generated on the spindle, a lot of manpower is required to process the residual thread residual thread. The method is disclosed in, for example, JP-A-60-126334 and JP-A-60-161174. In these tube replacement methods, a thread hooking device made of an annular raised cloth or the like is provided in the middle part of the spindle, and the tail bobbin of the full bobbin is wound around the spindle in a loop shape by pulling out the full bobbin from the spindle, The looped tail yarn is hooked and held by a yarn hooking tool, and then the tail yarn proliferating between the full bobbin and the spindle is cut by a cutting device. However, as described above, when the tail thread is hooked on the thread hooking tool provided on the spindle to hold the tail thread, the remaining thread remains on the thread hooking tool when the full bobbin is removed, and the thread holding ability decreases. It takes manpower to remove the residual thread, and the spindle and bobbin are not fitted properly, which makes the tube change operation unstable. Force causes the tail thread to slide down on the spindle, making it impossible to hold the cut end of the tail thread between the empty bobbin that is newly attached to the spindle and the spindle, resulting in thread breakage when restarting. It was Therefore, in order to solve the above-mentioned problems, it has been
As disclosed in Japanese Patent No. 61-258035, an accommodation frame that is reciprocally driven is arranged in the front of the machine base at a standby position below the spindle rail and an operating position in front of the spindle, and a tail thread is placed in the accommodation frame. It has been proposed to provide a gripping mechanism capable of gripping and releasing and a cutting mechanism capable of cutting the tail yarn.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the device described in the above publication, the gripping mechanism can positively grip the bottom thread and prevent the bottom thread from slipping off from the spindle. Since the accommodation frame that is reciprocally moved by the swinging member is arranged at the operating position, a large space is required in front of the machine base for gripping the tail thread, and the thread splicing operation or thread splicing at the time of thread breakage occurs. There is a problem that the operation is hindered, the device for gripping the tail thread becomes large and complicated, and assembly and maintenance are troublesome, and it is possible to solve these problems of the present invention. It is an issue.

Means for Solving the Problem In order to solve the above-mentioned problems, the present invention provides a full bobbin mounted on a spindle and an empty bobbin inserted in a peg of a yarn thread transporting device arranged in front of a machine base. In a spinning machine or the like equipped with a simultaneous transfer device that performs simultaneous replacement, a thread gripping means capable of gripping and releasing a tail thread proliferating between a full bobbin and a spindle, which is levitated in front of the spindle on each separator. And a drive device for operating the thread gripping means in association with the pipe replacement operation.

Action When the full bobbin inserted into the spindle is pulled up by the simultaneous transfer device and moved to the front of the spindle, the bobbin thread of the full bobbin is wound around the spindle in a loop and the middle part of the height of the spindle is reached. The yarn is handed over from the vicinity to the front full bobbin, and in this state, the yarn gripping means provided on each separator is actuated by the drive device to positively grasp the trailing yarn between the spindle and the full bobbin. Therefore, by cutting the bottom thread while the bottom thread is being held by the thread gripping means, and then inserting a new empty bobbin onto the spindle, the bottom thread wound on the spindle can be secured between the empty bobbin and the spindle. Can be sandwiched between. Further, since the thread gripping means is provided in each separator, the assembly and maintenance of the thread gripping means can be easily integrated with the separators, and the thread gripping means can be arranged between the separators or in the separators, and the device can be downsized. .

Example First, a generally known spinning machine 1 with a simultaneous transfer device will be described with reference to FIG. In FIG. 2, 2 is a spinning frame, 3 is a spindle rail, 4 is a spindle, and 5 is a spindle.
Is a ring rail, 6 is a ring for 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 full bobbin A is inserted into the spindle 4. The yarn 11 that is worn and spun from the draft roller 8 is applied to the yarn guide 10 and the traveler.
After 6a, he is full of bobbins A. Reference numeral 12 denotes a yarn transporting device which is disposed below the spindle rail 3, and includes a guide rail 14 attached to the machine base 2 and a spindle as shown in JP-A-57-161134. An empty bobbin B is inserted into the peg 15a of the peg tray 15 and is composed of a large number of peg trays 15 movably mounted in a single row so as to have the same pitch as the pitch, and moving means (not shown) for moving the peg trays 15. It is worn. Depositing pegs 16 are fixed to the guide rails 14 at positions corresponding to the respective spindles 4. Further, 17 is a full bobbin A and a peg 15a which are inserted and attached to the spindle 4.
A simultaneous pipe exchange device for simultaneously exchanging the empty bobbins B attached to the pipe. As shown in Japanese Patent Publication No. 51-24008, a pipe exchange bar 19 having a pipe gripping tool 18 corresponding to each spindle 4.
And a vertical movement mechanism that applies a Scott-Lasses type strict linear motion mechanism that translates the transfer bar 19 in the vertical direction.
20 and a longitudinal movement mechanism 21 for moving the vertical movement mechanism 20 in the longitudinal direction in parallel. In the standby state, as shown by the solid line, the pipe gripping tool 18 is housed in the spindle rail 3 to be compact. There is. The simultaneous transfer device 17 first advances, lowers, retracts, and lowers the transfer bar 19 to grip and remove the empty bobbin B attached to the peg 15a, and then deposits the empty bobbin B into the peg. Insert into 16 and then replace bar 19
To move forward, ascend, descend, and lower to grab and remove the full bobbin A attached to the spindle 4, and then lift it to the front of the spindle 4 as shown by the phantom line, and then lower it. The bobbin B is inserted into the peg 15a, and then the empty bobbin B inserted into the deposit peg 16 is grasped and taken out, and then raised to be inserted into the spindle 4. Also,
Reference numeral 23 designates a tail thread cutting device for cutting a tail thread 24 (see FIG. 9) proliferating between the full bobbin A doffed to the front of the spindle 4 and the spindle 4, which is disclosed in JP-A-60-81337. As shown in the publication, a pair of upper and lower rotary blades 26 overlapping each other on a traveling body 25 movably arranged along the spindle rail 3.
27 is attached, and the trailing thread 24 is cut by the rotary blades 26, 27 as the traveling body 25 travels during doffing.

Next, the tail yarn gripping device 30 incorporated in the above-described spinning machine 1 with a simultaneous transfer device will be described with reference to FIGS. 1 and 3 to 6. In this trailing yarn gripping device 30, 31 is a trailing yarn that proliferates between the full bobbin A and the spindle 4 which are doffed in front of the spindle 4 on each separator 7 on the left side toward the machine base 2.
The thread gripping means 24 is provided so as to grip and release 24, and the reference numeral 32 denotes a drive device that operates the gripping means 31 in association with the pipe changing operation of the simultaneous pipe changing device 17.

In the gripping means 31, 33 is a housing groove formed on the side surface of the front portion of the separator 7, 35 is a horizontal groove formed on the separator 7 between the lower end portion of the housing groove 33 and a notch 34 provided at the rear portion of the separator 7. The directional bearing hole 36 is an insertion groove formed on the front side surface of the separator 7 so as to be located on the extension line of the bearing hole 35. The accommodating groove 33 is located in front of the groove bobbin A inserted into the spindle 4, and the bearing hole 35 of the spindle 4 is lowered in a state where the ring rail 5 is lowered to the doffing position as shown in FIG. It is located near the middle height. Further, 37 is a support shaft rotatably inserted into the support hole 35 through the insertion groove 36, 38 is a thread gripping lever integrally provided at one end of the support shaft 37 so as to be orthogonal to the support shaft 37, As shown in FIG. 3, when it is rotated upward, it is completely housed in the housing groove 33 and is in contact with the bottom surface of the housing groove 33 over the entire length. The thread gripping lever 38 is formed to have a length slightly shorter than the distance between the separators 7.
As shown by the phantom line in FIGS. 4 and 5, when it is turned sideways, it crosses the front of the full bobbin A inserted into the spindle 4.

In the drive unit 32, reference numeral 40 denotes an air cylinder incorporated in the rear portion of the separator 7, which includes a cylinder body 41 formed integrally with the separator 7, a cap 42 fixed to the cylinder body 41, and a cylinder body 41. The piston 43 and the return spring 44 are fitted in the piston 43, and the piston rod 45 is integrally connected to the piston 43. One end of an air supply / discharge hose 46 is connected to the cylinder body 41, and the other end of the air supply / discharge hose 46 is connected to an air supply / discharge pipe 47 arranged along the ring rail 5. The air supply / discharge pipe 47 is connected to an air supply source (not shown) via a switching valve operated by a control device. The piston rod 45 is notched
34, the tip of which is connected to an arm 48 fixed to the other end of the support shaft 37 via a connecting rod 49, and is usually a return spring.
The thread grasping lever 38 is urged to rotate upward by 44 and brought into contact with the floor surface of the accommodation groove 33. When air is supplied into the cylinder body 41, the piston rod 45 projects and the thread grasping lever 38 Is rotated sideways by about 90 degrees.

In the above-mentioned structure, when the bobbin inserted in the spindle 4 becomes full bobbin A by the spinning operation of the spinning machine 1, the ring rail 5 descends as shown in FIG. 11 is wound around the lower end of the bobbin to form a tail winding (bottom bunch), and then the spinning operation is stopped. On the other hand, before the bobbin inserted into the spindle 4 becomes full bobbin A, the changeover bar 19 of the simultaneous changeover device 17 is moved to deposit the empty bobbin B inserted into the peg 15a and deposit the peg 16 To attach. When the spinning operation is stopped, air is supplied to the air supply / discharge pipe 47 of the tail yarn gripping device 30, whereby the piston rod 45 of each air cylinder 40 is projected against the spring force of the return spring 44. The thread grip lever 38 is rotated downward by approximately 90 degrees. As a result, the thread grip lever 38 is shown in FIG.
As shown in FIG. 8 (a), the full bobbin A is positioned substantially horizontally in front of the middle height. In this state, the simultaneous transfer device
The tube change lever 19 of 17 is moved to pull out the full bobbin A attached to the spindle 4, and the full bobbin A is shown in FIG. 7 (B), FIG. 8 (b), and FIG. Then, the doffing is carried out at the front position of the spindle 4 and is temporarily held at that position.
Due to the doffing of the full bobbin A, the tail yarn 24 of the tail bobbin of the full bobbin A is wound around the spindle 4 in a loop shape and then pulled out across the upper part of the yarn gripping lever 38. Next, the supply of air to the air supply / discharge pipe 47 is stopped and switched to the discharge side, whereby the piston rod 45 of each air cylinder 40 is retracted and moved by the return spring 44, and the thread grip lever 38
To rotate upward. As a result, the thread gripping lever 38 elastically abuts the bottom surface of the accommodating groove 33 of the separator 7 as shown in FIGS. 7 (C), 8 (c) and 9, and the full bobbin A
The tail yarn 24 proliferating between the spindle 4 and the spindle 4 is grasped between the yarn grasping lever 38 and the separator 7. In the above case, since the spun yarn 11 is guided upward from the traveler 6a, there is no possibility of being caught by the yarn gripping lever 38. After that, the running body 25 of the tail thread cutting device 23 moves the spindle rail 3
As shown in FIG. 7 (D) and FIG. 8 (d), the tail thread 24 proliferating between the full bobbin A and the thread gripping lever 38 is cut, but the spindle 4 Since the tail thread 24 on the side is gripped between the thread gripping lever 38 and the separator 7, the tail thread 24 wound around the spindle 4 does not slip off from the spindle 4. After that, simultaneous transfer device 17
The replacement bar 19 is lowered to insert the full bobbin A into the peg 15a, and then to the empty bobbin B inserted into the deposit peg 16.
Is pulled out and attached to the spindle 4. Above empty bobbin B
When the bobbin B is inserted into the spindle 4 and the lower end of the empty bobbin B is connected between the thread gripping lever 38 and the spindle 4.
24 by pushing down and pulling the bottom thread 24,
The blank bobbin B is pulled out from between the separator 38 and the separator 7, and the tail thread 24 wound around the spindle 4 in a loop shape is securely pinched between the tail thread 24 and the spindle 4. When the empty bobbin B is attached to the spindle 4, immediately before the empty bobbin B pushes down the tail thread 24 between the thread gripping lever 38 and the spindle 4, the air supply / exhaust pipe 47 is supplied with air. May be temporarily supplied to positively release the grip of the tail thread 24 by the thread grip lever 38. Then, the spinning operation is automatically started again, and the spun yarn 11 is reliably inserted into the empty bobbin B inserted in the spindle 4.

Next, in the tail yarn gripping device 30 having the above-mentioned configuration, most of the gripping mechanism 31 and the driving device 32 are incorporated in each separator 7, so that the separator 7 is assembled during assembly and maintenance. By assembling or replacing, most of the assembly and maintenance of the tail thread gripping device 30 can be completed. In the normal spinning operation state, the yarn gripping means
Since 31 is housed in the separator 7 so that the obstacles do not largely overhang from the side surface of the separator 7, the function of the separator 7 can be sufficiently exerted during spinning operation as in a conventional separator. Further, since the yarn gripping means 31 is housed in the separator 7 as described above, even if the yarn breakage occurs for some reason during the spinning operation, the yarn splicing operation for the yarn breakage is not disturbed at all. , You can operate the splicing easily.

FIG. 10 shows a different example of the present application, in which the thread gripping lever 38
e is pivotally attached to the front end surface of the separator 7e via a support shaft 37e, and an arm 48e fixed to each support shaft 37e is connected to an operation bar 80 reciprocally moved by the air cylinder 40e via a connecting rod 49e. There is. When the air cylinder 40e moves the operation bar 80 to the right end, the thread gripping levers 38e are turned sideways as shown by the phantom line, and when the operation bar 80 is moved to the left end, the thread gripping levers 38e are moved. 38e is rotated upward as shown by the solid line to grip the bottom thread between the thread grip lever 38e and the front end surface of the separator 7e.

One air cylinder 40e may be used to operate the thread gripping levers 38e of all the weights. Alternatively, the air cylinders 40e may be arranged in groups each having a plurality of weights.
Alternatively, the thread gripping levers 38e of the corresponding group may be operated. In this embodiment and the embodiment shown in the next figure, the same or equivalent components as those in the above embodiment are designated by the same reference numerals as those in the corresponding embodiment and the letters "e" and "f" are attached to omit duplicate description. .

FIG. 11 shows another different example of the present application, in which a pair of thread gripping levers 38af, 38bf are pivotally attached to the separator 7f via support shafts 37af, 37bf, and an air cylinder 40 is provided on the rear side of the separator 7f.
Arms 48af, 4 with f attached and fixed to both support shafts 37af, 37bf
8bf is connected to a connecting arm 45af fixed to a piston rod 45f of an air cylinder 40f via connecting rods 49af and 49bf, respectively. When the piston rod 45f of the air cylinder 40af moves to the ascending end, the pair of thread gripping levers 38af and 38bf are respectively rotated so as to face upward and downward as shown by the imaginary line, and the piston rod 45f also moves to the descending end. Then, the pair of thread gripping levers 38af and 38bf are rotated laterally and brought into contact with each other, and the tail thread 24f is gripped between the two thread gripping levers 38af and 38bf.

The tail yarn gripping device of the present application is not limited to the above-mentioned spinning machine with a simultaneous transfer device, but may be implemented in various types of spinning machine with a simultaneous transfer device. Further, the tail thread cutting device is not limited to the traveling type, and may be constituted by a fixed blade or a movable blade disposed on the ring rail or the separator. It is not limited. Further, as the driving device, a solenoid operated by energization of electricity may be used.

As described above, in the present invention, each separator is provided with the gripping means capable of gripping and releasing the tail yarn, and these gripping means are operated by the drive device in association with the pipe replacement operation. Therefore, it is possible to positively grip the bottom thread connected between the full bobbin that is fried in the front of the spindle and the spindle, and prevent the bottom thread from slipping off from the spindle when the bottom thread is cut, resulting in thread breakage at restart. It is possible to prevent the residual yarn from remaining on the spindle, and to save the labor of removing the residual yarn from the spindle, and to make the degree of fitting between the spindle and the bobbin always constant to stabilize the pipe replacement operation. it can. Even if the tail thread can be positively gripped as described above, since the thread gripping means is provided in each separator, the thread gripping means is integrally assembled with the separator or integrated with the separator during maintenance. It can be exchanged for easy assembly and maintenance, and the thread gripping means can be arranged between and within the separators to simplify and miniaturize the device, and prevent hindrance to the pipe replacement operation or yarn splicing operation. it can.

[Brief description of drawings]

The drawings show the embodiments of the present application. FIG. 1 is a sectional view of a spinning machine showing a spindle portion, FIG. 2 is a sectional view showing an essential part of a spinning machine with a simultaneous transfer device, and FIG. 4 is a plan view of FIG. 3, FIG. 5 is an enlarged view of an arrow V portion of FIG. 1, and FIG. 6 is a view of an arrow VI portion of 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 ... Spinner, 4 ... Spindle, A ... Full bobbin, B
…… Empty bobbin, 7 …… Separator, 12 …… Tubing thread conveying device, 17 …… Simultaneous pipe changing device, 30 …… Tail thread gripping device, 31 ……
Thread gripping means, 32 ... Drive device

Claims (1)

[Claims] Claim: What is claimed is: 1. A fine liner equipped with a simultaneous changing device for simultaneously changing a full bobbin mounted on a spindle and an empty bobbin inserted on a peg of a yarn threading device arranged in front of a machine base. In a spinning machine, etc., each separator is provided with a thread gripping means capable of gripping and releasing the bottom thread connected between the full bobbin hoisted in front of the spindle and the spindle, and these thread gripping means are associated with the pipe replacement operation. Bottom thread grasping device in a spinning machine or the like, which is provided with a drive device that is operated in the following manner.