JP2021088450A - Thread pressing structure of thread piecing device, thread piecing device and winding device - Google Patents

Abstract

To provide a thread pressing structure of a thread piecing device capable of improving a form of a joint of thread, and a thread piecing device and a winding device.SOLUTION: A thread pressing structure 100 is a structure for pressing first and second thread ends in a thread piecing device 26, and comprises a front plate 90 and a thread pressing member 80. The thread pressing member 80 is provided movably in a direction approaching and separating from a front surface 90a of the front plate 90, and presses the first and second thread ends in cooperation with the front surface 90a by contacting with the front surface 90a. The thread pressing member 80 includes: a first thread pressing lever 82 for pressing the first thread end; a second thread pressing lever 83 for pressing the second thread end; a connection part 84 for connecting the second thread pressing lever 83 to the first thread pressing lever 82 so as to move in the direction approaching and separating from the front surface 90a; and a coil spring 86 for energizing the second thread pressing lever 83 so as to approach the front surface 90a.SELECTED DRAWING: Figure 6

Description

The present invention relates to a thread holding structure of a thread joining device, a thread joining device, and a winding device.

Conventionally, a thread splicing device for splicing a first thread end and a second thread end by the action of compressed air is known. In such a thread splicing device, for example, as described in Patent Document 1, a thread aligner that is rotatably supported around a swivel shaft and is rotatable by a separate drive device is provided. The thread aligner pulls back both threads until the ends of both threads to be spliced are located in the splicing passage of the splicing device with an optimum overlap length.

Japanese Patent No. 6478687

By the way, in the thread joining device as described above, a thread pressing member for pressing the first and second thread ends may be mounted. In this case, the first and second yarn ends cannot be pressed in the same manner by the yarn pressing member, and the shape of the yarn seam may become unstable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a thread holding structure, a thread joining device, and a winding device of a thread joining device capable of improving the shape of a thread seam. ..

The thread holding structure of the thread joining device according to the present invention is a structure for pressing the first and second thread ends in a thread joining device that joins the first thread end and the second thread end by the action of compressed air. A contact member having a contact surface along the thread running direction and a contact member that is movably provided in a direction approaching and separating from the contact surface, and contacting the contact surface brings the first and second yarn ends. A thread pressing member that presses in cooperation with the contact surface is provided, and the thread pressing member includes a first thread pressing lever that presses the first thread end, a second thread pressing lever that presses the second thread end, and a first thread pressing member. A connecting portion that movably connects the second thread holding lever to the thread holding lever in the direction of approaching and separating from the contact surface, and urging the second thread holding lever so as to approach the contact surface. It has a force member and.

In the thread holding structure of this thread joining device, the second thread holding lever is movably connected to the first thread holding lever, and the second thread holding lever is urged so as to approach the contact surface. ing. Therefore, the first and second thread pressing levers can be easily brought into contact with the contact surface in the same manner, and the first thread end and the second thread end can be pressed in the same manner by the thread pressing member. Therefore, a beautiful thread seam can be formed, and the shape of the thread seam can be improved.

In the thread holding structure of the thread joining device according to the present invention, the urging member may have an elastic member. In this case, the elastic force of the elastic member can be used to urge the second thread holding lever so as to approach the contact surface.

In the thread holding structure of the thread joining device according to the present invention, the elastic member may include a coil spring. As a result, the elastic force of the coil spring can be used to urge the second thread holding lever so as to approach the contact surface.

In the thread holding structure of the thread joining device according to the present invention, the urging member may have a magnet. In this case, the second thread holding lever can be urged to approach the contact surface by using the magnetic force.

In the thread holding structure of the thread joining device according to the present invention, the first thread holding lever has a wedge-shaped gap formed between the thread holding lever and the contact surface when the tip end side of the first thread holding lever comes into contact with the contact surface. , The first thread end is regulated, and the second thread holding lever is the second thread due to the wedge-shaped gap formed between the thread holding lever and the contact surface when the tip end side abuts on the contact surface. The edges may be regulated. In this case, the ends of the first and second yarns can be regulated by wedge-shaped gaps instead of being completely pressed. As a result, it is possible to prevent the yarn from escaping from the working range of the yarn splicing device due to its own contraction force, and when it is necessary to guide (move) the yarn for the yarn splicing, the first and second It is possible to move the thread with a stronger force without releasing the contact by the thread holding lever. As a result, the number of times the first and second thread holding levers are driven can be minimized, so that fatigue deterioration of the first and second thread holding levers can be suppressed, and the operation of the member in the thread joining work. Work efficiency can be expected to improve by reducing the number of times.

In the thread holding structure of the thread joining device according to the present invention, the connecting portion is provided on the first thread holding lever, and the second thread holding lever approaches and separates from the contact surface with respect to the first thread holding lever. A shaft portion that swingably supports the shaft, a convex portion provided on the first thread holding lever, and a convex portion formed on the second thread holding lever, and the convex portion can move a certain amount in the direction of approaching and separating from the contact surface. It may include a hole to be inserted into. With such a configuration, a connecting portion for movably connecting the second thread holding lever to the first thread holding lever can be realized with a simple structure without adopting another stopper member or the like.

In the thread holding structure of the thread joining device according to the present invention, the urging member includes an elastic member as a coil spring, one end of the coil spring is engaged with the second thread holding lever, and the other end of the coil spring. May be engaged with a plate-shaped member fixed to the shaft portion. With such a configuration, it is possible to specifically realize an urging member that urges the second thread holding lever so as to approach the contact surface.

The thread joining device according to the present invention includes the above-mentioned thread holding structure. This thread splicing device has the above-mentioned effects such as being able to improve the shape of the thread seam.

The take-up device according to the present invention includes the above-mentioned thread splicing device. This take-up device has the above-mentioned effects such as being able to improve the shape of the seam of the yarn.

According to the present invention, it is possible to provide a thread holding structure, a thread joining device and a winding device of a thread joining device capable of improving the shape of a thread seam.

FIG. 1 is a front view showing an automatic winder. FIG. 2 is a side view showing the winder unit of FIG. FIG. 3 is a front view showing the thread splicing device of FIG. FIG. 4 is a perspective view showing the thread holding member of FIG. FIG. 5 is a perspective view showing the thread holding member of FIG. FIG. 6 is a perspective view showing the thread holding member of FIG. FIG. 7A is a plan view showing the first thread holding lever of FIG. FIG. 7B is a front view showing the first thread holding lever of FIG. FIG. 7 (c) is a bottom view showing the first thread holding lever of FIG. FIG. 8A is a plan view showing the second thread holding lever of FIG. FIG. 8B is a side view showing the second thread holding lever of FIG. FIG. 9A is a perspective view showing the plate-shaped member of FIG. FIG. 9B is a perspective view showing the coil spring of FIG. FIG. 10 is a view for explaining a case where the first and second yarn ends are pressed by the yarn pressing member of FIG. 3, and is a plan sectional view showing a part of the yarn joining device in an enlarged manner.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 1, the automatic winder 1 includes a plurality of winder units (winding devices) 3 arranged side by side, a machine stand control device 5, and a ball lifting device 7. The machine stand control device 5 can communicate with each of the plurality of winder units 3. The operator of the automatic winder 1 can collectively manage a plurality of winder units 3 by appropriately operating the machine base control device 5. Each winder unit 3 forms a package P by unwinding the yarn Y from the yarn feeding bobbin SB and winding the yarn Y around the winding bobbin WB while swinging the yarn Y. When the package P is fully wound (a state in which a specified amount of yarn is wound) in each winder unit 3, the bobbin 7 travels to the position of the winder unit 3 and removes the full-wound package. , Set the empty take-up bobbin WB.

As shown in FIG. 2, the winder unit 3 includes a unit control unit 10, a yarn feeding device 12, and a winding unit 14. The unit control unit 10 includes, for example, a CPU (Central Processing Unit) and a ROM (Read Only Memory). A program for controlling each configuration of the winder unit 3 is stored in the ROM. The CPU executes the program stored in the ROM.

The thread feeding device 12 supports the thread feeding bobbin SB mounted on the transport tray (not shown) at a predetermined position. The thread feeding device 12 unwinds the thread Y from the thread feeding bobbin SB and pulls out the thread Y from the thread feeding bobbin SB. The thread feeding device 12 supplies the thread Y. The yarn feeding device 12 is not limited to the transport tray type device, and may be, for example, a magazine type device.

The take-up unit 14 includes a cradle 16 and a take-up drum 18. The cradle 16 rotatably supports the take-up bobbin WB (or package P) by sandwiching the take-up bobbin WB. The take-up drum 18 traverses the thread Y on the surface of the package P and rotates the package P. The take-up drum 18 is rotationally driven by a drum drive motor (not shown). With the outer circumference of the package P in contact with the take-up drum 18, the take-up drum 18 is rotationally driven to rotate the package P in a driven manner. A spiral twill groove is formed on the outer peripheral surface of the take-up drum 18. The thread Y unwound from the thread-feeding bobbin SB is wound around the surface of the package P while being traversed by a twill groove with a constant width. Thereby, the package P having a constant winding width can be formed.

Each winder unit 3 includes an unwinding assisting device 20, a tension applying device 22, a tension detecting device 24, and an unwinding assisting device 20, a tension applying device 22, and a tension detecting device 24, in order from the yarn feeding device 12 side, in the thread path between the yarn feeding device 12 and the winding unit 14. A thread splicing device 26 and a thread monitoring device 28 are provided. A first capture guide device 30 and a second capture guide device 32 are arranged in the vicinity of the thread joining device 26.

The unwinding assisting device 20 prevents the thread Y unwound from the thread feeding bobbin SB from being excessively swung by centrifugal force, and appropriately unwinds the thread Y from the thread feeding bobbin SB. The tension applying device 22 applies a predetermined tension to the traveling thread Y. In the present embodiment, the tension applying device 22 is a gate type device in which movable comb teeth are arranged with respect to fixed comb teeth.

The tension detection device 24 detects the tension of the traveling thread Y between the thread feeding device 12 and the winding unit 14. In the thread joining device 26, when the thread Y is divided between the thread feeding device 12 and the winding unit 14 for some reason, the thread Y on the thread feeding device 12 side and the thread Y on the winding unit 14 side are used. And splice.

The thread monitoring device 28 monitors the state of the thread Y traveling on the thread path, and detects the presence or absence of a thread defect based on the monitored information. The thread defect is, for example, at least one of an abnormality in the thickness of the thread Y, a foreign substance contained in the thread Y, a thread breakage, and the like.

The first catching guide device 30 can rotate from the standby position on the yarn feeding device 12 side to the catching position on the winding unit 14 side. The first catching guide device 30 catches the thread Y at the catching position and guides the thread Y to the thread joining device 26. The second catching guide device 32 can rotate from the standby position on the yarn feeding device 12 side to the catching position on the winding unit 14 side. The second catching guide device 32 catches the thread Y at the supplementary position and guides the thread Y to the thread joining device 26.

Next, the thread splicing device 26 described above will be described in more detail.

FIG. 3 is a front view showing the thread splicing device 26. In the following description, for convenience, the take-up portion 14 side is the upper side, the yarn feeder 12 side is the lower side, the traveling path (thread path) side of the yarn Y is the front side, and the opposite side is the rear side. That is. The thread end of the thread Y on the take-up portion 14 side is referred to as the first thread end, and the thread end of the thread Y on the thread feeder 12 side is referred to as the second thread end.

As shown in FIG. 3, the yarn splicing device 26 includes a front plate (contact member) 90, an untwisted portion 40 including a first untwisted pipe member 41A and a second untwisted pipe member 41B, and compressed air. A yarn splicing portion 50 that splics yarn by injection, a pair of yarn gathering levers (not shown) that can swivel so as to sandwich the untwisted portion 40, and a yarn splicing portion 50 that can be swiveled so as to sandwich the yarn splicing portion 50. A thread pressing member 80 including the first and second thread pressing levers 82 and 83, and an air guide 94 are provided.

The front plate 90 has a plate shape with the front-rear direction as the thickness direction. The front surface (contact surface) 90a of the front plate 90 has a flat shape along the thread traveling direction. A thread joint portion 50 is provided on the front surface 90a of the front plate 90. In the front surface 90a of the front plate 90, a first yarn end introduction port, which is an opening of the first untwisted pipe member 41A, is provided on the upper side of the yarn joint portion 50, and a second untwisting portion is provided on the lower side of the yarn joint portion 50. A second thread end introduction port, which is an opening of the pipe member 41B, is provided.

On the front surface 90a of the front plate 90, a first guide portion 45A is provided above the first untwisted pipe member 41A, and a second guide portion 45B is provided below the second untwisted pipe member 41B. .. The first and second guide portions 45A and 45B are arranged so as to face each other with the thread joint portion 50 interposed therebetween. Each of the first and second guide portions 45A and 45B guides the thread Y guided by the first and second capture guide devices 30 and 32, respectively.

The first untwisted pipe member 41A takes in the first yarn end by the action of compressed air and untwists. The second untwisted pipe member 41B takes in the second yarn end by the action of compressed air and untwists. The yarn joint portion 50 twists the first yarn end untwisted by the first untwisted pipe member 41A and the second yarn end untwisted by the second untwisted pipe member 41B by the action of compressed air. Take over. When twisting the yarn ends together in the yarn joint 50, the first and second yarn ends are held by a clamp (not shown), and the first and second untwisted pipes are held by a yarn gathering lever (not shown). It is pulled out from the members 41A and 41B and is pressed by the first and second thread pressing levers 82 and 83 in the vicinity of the thread joint portion 50.

The thread holding member 80 is connected to a drive source (not shown) such as a stepping motor via a cam link mechanism 95. The thread holding member 80 is provided so as to be movable in the direction of approaching and separating from the front surface 90a of the front plate 90 by the driving force of the driving source. That is, the first and second thread holding levers 82 and 83 of the thread holding member 80 rotate (rotate) so that the tip side approaches and separates from the front surface 90a of the front plate 90 by the driving force of the driving source. The thread pressing member 80 abuts on the front surface 90a of the front plate 90 to press the first and second thread ends in cooperation with the front surface 90a. The first and second thread holding levers 82 and 83 may be urged so that the tip side approaches the front plate 90 by, for example, a torsion coil spring (not shown). The air guide 94 is a member that guides the compressed air injected at the yarn joint 50, and is one of the upper and lower openings of the yarn joint chamber into which the first and second yarn ends are introduced at the yarn joint 50. It is provided to close the part.

In the thread joining device 26 configured as described above, first, the first and second thread gathering levers (not shown) and the first and second thread holding levers 82 are swiveled toward the front plate 90 side. As a result, the upper yarn Y and the lower yarn Y guided by the first and second capture guide devices 30 and 32 are attracted to the untwisted portion 40 side. Then, the upper thread Y and the lower thread Y are held by the clamp and cut by the cutter in this state. The first yarn end is fed into the inside of the first untwisted pipe member 41A, and the second yarn end is fed into the inside of the second untwisted pipe member 41B. The injection of compressed air is started in the first and second untwisted pipe members 41A and 41B, and the first and second yarn ends are untwisted by the action of the compressed air.

Subsequently, the first and second thread gathering levers (not shown) further rotate. As a result, while the first yarn end and the second yarn end are pulled out from the first and second untwisted pipe members 41A and 41B, respectively, the first and second yarn retainer levers 82 and 83 near the yarn joint portion 50. It is held down. The injection of compressed air is started at the yarn joint 50, and the untwisted first yarn end and the second yarn end are twisted by the action of the compressed air. Subsequently, the first and second thread pulling levers (not shown) and the first and second thread holding levers 82 and 83 rotate in opposite directions. Then, the holding of the upper thread Y and the lower thread Y by the clamp is released. As a result, the connected thread Y returns to the traveling path on the front side of the thread joining device 26. The thread holding member 80 and the front plate 90 form a thread holding structure 100 that holds the first and second thread ends in the thread joining device 26.

Next, the configuration of the thread holding member 80 will be described in detail.

As shown in at least one of FIGS. 4 to 6, the thread pressing member 80 includes a first thread pressing lever 82, a second thread pressing lever 83, a connecting portion 84, a plate-shaped member 85, and a coil spring 86.

As shown in at least one of FIGS. 4 to 7, the first thread holding lever 82 is a member that holds down the first thread end. The first thread holding lever 82 has a plate shape. The first thread holding lever 82 is a fixing portion 82B that is continuous with the first lever main body 82A that comes into contact with the front plate 90 and the base end side of the first lever main body 82A and to which the cam link mechanism 95 (see FIG. 3) is fixed. And have. The first lever body 82A has a plate shape with the thread traveling direction as the thickness direction. A contact portion 82C that comes into contact with the front plate 90 is provided on the tip end side of the first lever body 82A. The fixing portion 82B is connected to the front side of the first lever main body 82A on the base end side, bends 90 ° upward from the first lever main body 82A, and then bends 90 ° and extends rearward.

As shown in at least one of FIGS. 4 to 6 and 8, the second thread holding lever 83 is a member that holds the second thread end. The second thread holding lever 83 is arranged so as to line up with the first thread holding lever 82 at a predetermined interval along the thread traveling direction. The second thread holding lever 83 has a plate shape with the thread traveling direction as the thickness direction. A contact portion 83C that comes into contact with the front plate 90 is provided on the tip end side of the second thread holding lever 83.

The connecting portion 84 connects the second thread holding lever 83 to the first thread holding lever 82 so as to be movable in the direction of approaching and separating from the front surface 90a of the front plate 90. The connecting portion 84 has a shaft portion 84A, a convex portion 84B, and a hole portion 84C.

The shaft portion 84A is provided on the first thread holding lever 82, and swingably supports the second thread holding lever 83 with respect to the first thread holding lever 82 in the direction of approaching and separating from the front surface 90a.
The shaft portion 84A is a shaft body having a circular cross section with the thread traveling direction as the axial direction, which is erected on the upper surface of the fixing portion 82B of the first thread holding lever 82. Inside the shaft portion 84A, a screw hole (not shown) is formed along the axial direction thereof. The shaft portion 84A is inserted into the hole 83D formed on the base end side of the second thread holding lever 83 so as to penetrate the hole 83D and protrude.

The convex portion 84B is provided on the first thread holding lever 82. The convex portion 84B is provided on the upper surface of the vertical plate portion 82D which is connected to the upper portion of the fixed portion 82B of the first thread holding lever 82 and is bent 90 ° and extends upward so as to project upward with a rectangular cross section.

The hole portion 84C is a round hole formed in the second thread holding lever 83 into which the convex portion 84B is inserted. In the illustrated example, the hole 84C is provided on the tip end side of the hole 83D in the second thread holding lever 83. When the convex portion 84B is inserted into the hole portion 84C, a predetermined gap is formed between the inner surface of the hole portion 84C and the convex portion 84B. That is, the hole 84C is inserted so that the convex portion 84B can move a certain amount in the direction in which the convex portion 84B approaches and separates from the front surface 90a of the front plate 90.

According to such a connecting portion 84, the first thread holding lever 82 and the second thread holding lever 83 are connected. At the same time, the second thread holding lever 83 can rotate only a certain amount on the tip side (within the range in which the convex portion 84B can move in the hole portion 84C) with the base end side as the center, as opposed to the first thread holding lever 82. ..

As shown in FIGS. 6 and 9A, the plate-shaped member 85 is a plate-shaped small piece member whose thickness direction is the thread traveling direction. The plate-shaped member 85 is formed with a hole 85D into which a screw N is inserted. The plate-shaped member 85 is fastened to the upper end of the shaft portion 84A by the screw N, thereby being integrated with the first thread holding lever 82.

As shown in FIGS. 6 and 9 (b), the coil spring 86 is an elastic member (biasing member) that urges the second thread holding lever 83 so as to approach the front surface 90a. The coil spring 86 is attached between the second thread holding lever 83 and the plate-shaped member 85 around the shaft portion 84A. One end of the coil spring 86 is engaged with the engagement hole 83E formed in the second thread holding lever 83. The other end of the coil spring 86 is engaged with the engagement hole 85E formed in the plate-shaped member 85. According to such a coil spring 86, the second thread pressing lever 83 is urged against the first thread pressing lever 82 so that the tip end side of the second thread pressing lever 83 approaches the front surface 90a.

Returning to FIGS. 3 to 6, the thread holding member 80 is driven by a drive source (not shown) such as a stepping motor via a cam link mechanism 95, and the first and second thread holding levers 82 and 83 are at the tips thereof. The side contact portions 82C and 83C are integrally swiveled so as to approach the front surface 90a of the front plate 90. The contact portions 82C and 83C of the first and second thread holding levers 82 and 83 abut on the front surface 90a, and the first and second thread ends are sandwiched between the contact portions 82C and 83C and the front surface 90a. The first and second thread ends are regulated by a wedge-shaped small gap K (see FIG. 10). As a result, the first and second thread ends are pressed by the thread pressing member 80 in cooperation with the front surface 90a. At this time, even if the contact portions 82C and 83C cannot abut on the front surface 90a at the same time, the first and second thread holding levers 82 and 83 are separated from each other and are flexibly connected to each other. In the same way, it abuts on the front surface 90a.

As described above, in the thread pressing structure 100, when the first and second thread ends are pressed by the thread pressing member 80, the first and second thread pressing levers 82 and 83 can be easily brought into contact with the front surface 90a in the same manner, and the first and second threads are easily pressed. The second thread end can be pressed in the same way. Therefore, a beautiful seam of the thread Y can be formed, and the shape of the seam of the thread Y can be improved. It is possible to improve the strength of the seam of the thread Y.

The thread holding structure 100 has a coil spring 86, which is an elastic member, as an urging member. In this case, the elastic force of the coil spring 86, which is an elastic member, can be used to urge the second thread holding lever 83 so as to approach the front surface 90a.

In the thread holding structure 100, the first and second thread holding levers 82 and 83 regulate the first and second thread ends by the wedge-shaped gap K. In this case, the ends of the first and second yarns can be regulated by a wedge-shaped gap K instead of being completely pressed. As a result, when it is necessary to prevent the thread Y from escaping from the working range of the thread splicing device 26 due to its own contraction force and to guide (move) the thread Y for the thread splicing, the first step is made. If a certain amount of strong force is applied to the thread Y without releasing the contact by the second thread pressing levers 82 and 83, the thread Y can be moved. As a result, the number of times the first and second thread pressing levers 82 and 83 are driven can be minimized, and the number of times the first and second thread pressing levers 82 and 83 are operated is reduced, so that fatigue deterioration is suppressed. Further, it can be expected that the work efficiency is improved by suppressing the number of movements of the member in the thread joining work.

In the thread holding structure 100, the connecting portion 84 includes a shaft portion 84A, a convex portion 84B, and a hole portion 84C. With such a configuration, the connecting portion 84 that movably connects the second thread holding lever 83 to the first thread holding lever 82 can be realized with a simple structure without adopting another stopper member or the like.

In the thread holding structure 100, one end of the coil spring 86 is engaged with the second thread holding lever 83, and the other end of the coil spring 86 is engaged with the plate-shaped member 85. With such a configuration, it is possible to specifically realize an urging member that urges the second thread holding lever 83 so as to approach the front surface 90a.

The thread joining device 26 includes a thread holding structure 100. The thread splicing device 26 has the above-mentioned effects such as being able to improve the shape of the seam of the thread Y.

The winder unit 3 includes a thread splicing device 26. The winder unit 3 has the above-mentioned effects such as being able to improve the shape of the seam of the thread Y.

Although the embodiments have been described above, one aspect of the present invention is not limited to the above embodiments.

In the above embodiment, the thread holding structure 100 is applied to the thread joining device 26 of the winder unit 3, but the thread holding structure 100 moves between the thread joining device of the winding unit of the spinning machine or between a plurality of winding units. It may be applied to a thread splicing device such as a work cart. The above embodiment may have a magnet as an urging member. In this case, the second thread holding lever 83 can be urged to approach the front surface 90a by using the magnetic force.

3 ... Winder unit (winding device), 26 ... Thread splicing device, 90 ... Front plate (contact member), 90a ... Front surface (contact surface), 80 ... Thread holding member, 82 ... First thread holding lever, 83 ... Second thread retainer lever, 84 ... Connecting portion, 84A ... Shaft portion, 84B ... Convex portion, 84C ... Hole portion, 85 ... Plate-shaped member, 86 ... Coil spring (urging member, elastic member), 100 ... Thread retainer Structure, K ... Gap.

Claims (9)

In a yarn splicing device that splices a first yarn end and a second yarn end by the action of compressed air, the structure is such that the first and second yarn ends are pressed.
A contact member having a contact surface along the thread running direction,
A thread holding member that is movably provided in a direction that approaches and separates from the contact surface and that presses the first and second thread ends in cooperation with the contact surface by contacting the contact surface. With
The thread holding member is
The first thread holding lever that holds the first thread end and
The second thread holding lever that holds the second thread end and
A connecting portion that movably connects the second thread holding lever to the first thread holding lever in a direction that approaches and separates from the contact surface.
A thread holding structure of a thread joining device, comprising an urging member for urging the second thread holding lever so as to approach the contact surface. The thread holding structure of the thread joining device according to claim 1, wherein the urging member has an elastic member. The thread holding structure of the thread joining device according to claim 2, wherein the elastic member includes a coil spring. The thread holding structure of the thread joining device according to claim 1, wherein the urging member has a magnet. The first thread holding lever regulates the first thread end by a wedge-shaped gap formed between the thread holding lever and the contact surface when the tip end side abuts on the contact surface. ,
The second thread holding lever regulates the second thread end by a wedge-shaped gap formed between the thread holding lever and the contact surface when the tip end side abuts on the contact surface. , The thread holding structure of the thread joining device according to any one of claims 1 to 4. The connecting part
A shaft portion provided on the first thread holding lever and swingably supporting the second thread holding lever in a direction approaching and separating from the contact surface with respect to the first thread holding lever.
The convex portion provided on the first thread holding lever and
Any one of claims 1 to 5, including a hole formed in the second thread holding lever and inserted so that the convex portion can move a certain amount in the direction of approaching and separating from the contact surface. The thread holding structure of the thread joining device described in 1. The urging member includes an elastic member as a coil spring.
One end of the coil spring is engaged with the second thread holding lever.
The thread holding structure of the thread joining device according to claim 6, wherein the other end of the coil spring is engaged with a plate-shaped member fixed to the shaft portion. A thread splicing device comprising the thread holding structure according to any one of claims 1 to 7. A take-up device including the yarn splicing device according to claim 8.

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