JP2007174718A - Apparatus and method for binding string - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for binding a string which smoothly bind an object bound by using the string. <P>SOLUTION: In the string binding apparatus 100, a string binding unit 1 faces stator S, and the string B passes under a coil C. A distal end of the string is gripped by a string gripping chuck 51. The string B passes above the coil C. As the string B is inserted into a gap between a rotating plate 13 and a carrying pipe 11, the rotating plate 13 is turned, and the string B is wound onto the carrying pipe 11. As the distal end of the string B is gripped by a distal end chuck 14 disposed at a distal end of the carrying pipe 11, the string B wound onto the carrying pipe 11 is extracted. As the distal end of the string B is gripped by the distal end chuck 14, the string binding unit 1 is escaped from the stator S, and the coil C is tightened. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thread binding device and a thread binding method for binding a bound body such as a stator coil with a thread. More specifically, the present invention relates to a thread binding device and a thread binding method capable of smoothly binding a bound object with a thread.

  In a vehicle drive motor mounted on a hybrid vehicle or the like, a coil (stator coil) is inserted into a slot of a stator, and coil end portions protruding from both surfaces of the stator are formed into a predetermined shape. Further, a lead wire for connecting to a power source is drawn out from the coil end portion. The lead wire is constrained together with the coil end portion by a thread in order to make the entire motor compact. Conventionally, this thread tying operation of the lead wire has been performed manually.

Moreover, as an apparatus for binding accessories to the coil end portion, there is an apparatus disclosed in Patent Document 1, for example. In this apparatus, a yarn passage that makes a round around the coil end portion is formed, and an air flow is generated in the yarn passage to convey the yarn. Then, after the yarn makes one turn around the coil end portion, a double knot knot and a single knot knot are formed, and the coil end portion is bound together with accessories.
JP-A-6-276710

  However, when the lead wire is fixed to the coil end portion manually, there are the following problems. In other words, the work of binding the lead wire to the coil end with a thread is complicated. Specifically, in order to bind the coil end portion with a thread, at least the coil end portion and the lead wire are threaded to form a loop (loop forming step), and a knot is formed on the yarn (knot forming step). ), It is necessary to tighten the lead wire together with the coil end with the yarn (tightening step).

  Since all these steps are performed manually, the final fixed state varies. In addition, the work takes a lot of time and the productivity is deteriorated. In addition, there is no device that can fully perform these steps, which makes it difficult to automate the work of fixing lead wires.

  In addition, although the apparatus which binds a coil end part is disclosed by patent document 1, this apparatus has the following problems. That is, in the apparatus disclosed in Patent Document 1, the coil end portion is tightened by two top knots (round knots). This knot requires that the next knot be made while maintaining the binding force of the first knot. For this reason, it is difficult to maintain the binding force, and tightening may be insufficient. Moreover, in the apparatus of patent document 1, the use will be limited to the binding of a coil end part. That is, there is no versatility.

  The present invention has been made to solve the above-described problems of the prior art. That is, an object of the present invention is to provide a thread tying device and a thread tying method capable of smoothly binding a bound object with a thread.

  A thread binding device made for the purpose of solving this problem is a thread binding device that binds a body to be bound with a thread, and is arranged so as to be able to advance and retreat with respect to the body to be bound with a thread supply unit that supplies the thread. A yarn feed pipe, a first yarn feed section for feeding the yarn supplied from the yarn feed section to the lower side of the constrained body through the inside of the yarn transport pipe, and the first yarn feed section for passing the yarn under the constrained body. A yarn turn-back portion that folds the formed yarn through the upper side of the bound body, a yarn winding portion that winds the end of the yarn turned back by the yarn turn-back portion around the yarn conveyance tube, and a yarn exit end of the yarn conveyance tube, A yarn gripping portion for gripping the yarn, a second yarn feeding portion for transporting the tip of the yarn wound around the yarn transporting tube by the yarn winding portion toward the thread gripping portion, and a yarn transporting tube located on the yarn transporting tube. Yarn that is slidable in the axial direction of the pipe and is wound around the yarn transport pipe by the yarn winding section A thread take-out section to be taken out from the thread transport pipe, and with the thread gripping section gripping the thread, by sliding the thread take-out section and the thread transport pipe, the thread wound around the thread transport pipe is taken out, The yarn carrying tube is retracted from the constrained body in a state where the yarn take-out portion takes out the yarn and the yarn gripping portion holds the tip of the yarn. In this specification, of both ends of the yarn conveying pipe, the end on the side where the yarn is fed into the pipe is referred to as “inlet end”, and the end on the side where the yarn is fed out of the pipe is referred to as “exit end”. To do.

  In the thread binding device of the present invention, the following operation is performed in order to bind the object to be bound with the thread. First, the yarn outlet end of the yarn conveying pipe is opposed to the bound object. Next, the first yarn feed section feeds the yarn from the exit end of the yarn transport pipe, and passes the yarn under the constrained body (yarn feed step). In other words, the tip of the yarn sent out from the outlet end of the yarn conveyance tube is conveyed to the opposite side of the yarn conveyance tube with the constrained body interposed therebetween.

  Next, the yarn turning portion grips the thread passed to the lower side of the bound body, and passes the thread to the upper side of the bound body (folding step). That is, the yarn tip is conveyed toward the yarn conveyance tube. As a result, the thread is folded back around the bound body, forming a loop and surrounding the bound body.

  Next, the yarn winding unit winds the yarn sent by the yarn folding unit around the yarn conveyance pipe (winding step). For example, the yarn winding unit includes a yarn pressing unit that presses the yarn folded back by the yarn folding unit against the yarn conveyance pipe leaving the end, and is rotatably arranged on the outer periphery of the yarn conveyance tube with a predetermined gap. It is preferable to have a rotating plate that is provided and starts rotating in a state where the yarn is disposed in the gap. That is, the yarn pressing portion can reliably bring the yarn close to the yarn transport pipe. Then, the yarn can be placed in the gap between the rotating plate and the yarn conveyance pipe by pulling the yarn after the yarn is pressed by the yarn pressing portion. In this state, the rotating plate rotates on the yarn conveyance tube, so that the yarn that is a free end can be wound. For example, a push bar that can move in the vertical direction is applicable to the thread pressing portion. Further, the rotating plate is attached to the yarn take-out portion that can slide with the transport pipe, so that it can be rotated with the rotation of the yarn take-out portion. That is, the yarn winding portion can be configured easily.

  Next, the second yarn feeding unit conveys the tip of the yarn wound around the yarn carrying tube to the yarn gripping portion provided near the exit end of the yarn carrying tube, and the yarn gripping unit grasps the tip of the yarn. (Thread tip gripping step).

  The second yarn feeder is, for example, located below the yarn conveyance tube, is movably disposed along the axial direction of the yarn conveyance tube, and the yarn conveyance tube is wound around the yarn conveyance tube. An axial feed member that moves toward the exit end of the yarn, and an axial feed member that is located below the yarn gripping part and that can move in a direction perpendicular to the axial direction of the yarn transport pipe. After that, it is preferable to have an orthogonal direction feed member that moves toward the yarn gripping portion. In other words, the tip of the yarn wound around the conveying pipe hangs down below the yarn conveying pipe. For this reason, the yarn is fed in the axial direction of the yarn conveying pipe by the axial feeding section that moves along the axial direction of the yarn conveying pipe. In other words, by moving the axial feed portion toward the exit end of the yarn transport pipe, the tip of the yarn is moved toward the yarn gripping portion located on the exit end side of the yarn transport tube. Then, after the axial feed portion has moved to a position where the axial feed portion is located at the same position as the mouth of the yarn gripping portion, the front end portion of the yarn is moved by the orthogonal feed portion that moves in the direction orthogonal to the axial direction. Send out until. Thereafter, the thread gripping part grips the thread. In other words, the second feeding unit can be configured with a simple configuration combining members moving in two directions.

  For example, the yarn gripping portion may be arranged so as to be able to come into contact with and separate from the yarn outlet end of the yarn conveying pipe, and the yarn may be gripped by sandwiching the yarn between the outlet end. That is, the thread can be gripped between the outlet end, and a thread gripping chuck can be easily configured.

  Next, in a state where the thread gripping part grips the leading end of the thread, the thread take-out part and the thread transport pipe slide, and the thread wound around the thread transport pipe is taken out from the thread transport pipe (thread picking step). When taking out the yarn, the yarn take-out section may move, or the yarn conveyance pipe may move. In either case, it is sufficient that both ends slide so that the end portion of the yarn take-out portion can pass through the chuck of the yarn gripping portion. As a result, the wound yarn passes through the yarn gripping portion and is taken out from the yarn conveyance tube. Furthermore, the thread knot is formed by shrinking the wound thread.

  Next, with the thread gripping part gripping the tip of the thread, the thread transporting part retracts and tightens the object to be bound (tightening step). In other words, the yarn knot is moved toward the bound body by the retracting of the yarn conveying section, and the bound body is bound by the thread. When the object to be bound is tightened, the object to be constrained can be bound with the restraint force sufficiently maintained by retracting the yarn conveying section until the object is not loosened. Furthermore, the adjustment of the binding force can be adjusted according to the retraction distance of the yarn conveying section.

  Furthermore, it is better that the yarn conveying section not only recedes linearly but can swing at least in one of the vertical direction and the horizontal direction. In other words, the yarn knot can be moved closer to the bound body by swinging the yarn conveying pipe, and the bound body can be restrained more reliably.

  Further, it is better that the first yarn feeding section of the yarn binding device of the present invention conveys the yarn by a roller. By feeding the yarn by the roller, adjustment for changing the yarn becomes easy. That is, if the yarn is to be conveyed by the air flow, it is difficult to adjust the yarn conveyance speed when the yarn material is changed. In some cases, parts must be replaced. However, the yarn can be conveyed by the roller as in the present invention, and the change of the yarn can be dealt with by adjusting the servo motor that is the driving source of the roller. Therefore, adjustment is very easy and there is no need to replace parts.

  In addition, as a to-be-bound body, although the stator coil containing a lead wire corresponds, for example, it is not restricted to this. For example, a single lead wire may be used. Also, it can be used when bundling dead branches or string-like sponges, and the bound body may be a hard material or a soft material.

  According to the present invention, the loop forming step for forming the yarn in a loop shape by passing the binding yarn through the bound body, the knot forming step for forming a knot on the thread, and the tightening step for tightening the bound body are all performed. It can be carried out. This makes it possible to automate the thread tying operation and improve productivity. Moreover, when tightening a to-be-bound object, sufficient restraint force can be maintained. Therefore, a thread tying device and a thread tying method capable of smoothly binding a bound object with a thread have been realized.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, the present invention is applied to a yarn binding device that binds a lead wire of a motor for driving a vehicle to a coil end portion of a stator coil with a binding yarn.

  As shown in FIG. 1, the thread binding device 100 according to this embodiment includes a thread binding unit 1, a thread bobbin 2, a thread feeding unit 3, a thread tensioner 4, and a thread reversing unit 5. In addition to the yarn binding device 100, a table 9 that supports the stator is disposed adjacent to the yarn binding device 100.

The thread binding unit 1 serves to form a thread knot and tighten a body to be bound (in this embodiment, a coil end of a stator). Specifically, as shown in FIG. 2, the yarn binding unit 1 includes a conveyance pipe 11 that conveys a thread therein, a rotating member 12 that covers the conveyance pipe 11 and is rotatably provided with the conveyance pipe 11 as an axis. , A rotating plate 13 attached to the rotating member 12 and rotating around the conveying tube 11 as the rotating member 12 rotates, and located on the outlet end side of the conveying tube 11 and in contact with the outlet end of the conveying tube 11. The front end chuck 14 is provided so as to be movable in a detachable direction (arrow X _{1 in} FIG. 2) and closes the outlet end by contacting the transport pipe 11.

The conveyance pipe 11 is a cylindrical steel pipe that accommodates the thread B inside. The yarn B in the transport pipe 11 is transported toward the tip chuck 14 side (exit end side). Furthermore, the tip chuck 14 is provided with a through-hole, and the yarn B that has been transported through the transport pipe 11 is discharged through the through-hole. Further, the tip chuck 14 forms a chuck with the end of the transport tube 11 by contacting and separating from the outlet end of the transport tube 11. The rotating member 12 is provided so as to be slidable in the axial direction of the transport pipe 11 (arrow X _{2 in} FIG. ₂ ).

Further, the thread binding unit 1 is provided with a push bar 6 and push plates 7A and 7B. The push rod 6 has a columnar tip and is disposed above the transport tube 11. The push bar 6 can move in the vertical direction (arrow Y _{1 in} FIG. 2) and the depth direction (arrow Z _{1 in} FIG. 2) in FIG. Is provided. The push plate 7 </ b> A is disposed below the transport pipe 11 and in parallel with the transport pipe 11. Further, the push plate 7A is movable in the left-right direction in FIG. 2 (arrow X _{3 in} FIG. 2), and is provided so as to be able to contact and separate from the push plate 7B described later. The push plate 7 </ b> B has a sharp cross section at the tip, and is disposed below the transport pipe 11. Further, the push plate 7B is movable in the vertical direction in FIG. 2 (arrow Y _{2 in} FIG. 2), and can be brought into and out of contact with the distal end portion of the transport pipe 11 (that is, the chuck portion of the distal end chuck 14). Is provided. The movement of the push rod 6 and the push plates 7A and 7B is realized by a known means.

Returning to the description of FIG. 1, the yarn feeding section 3 includes a roller group 31 constituted by a plurality of rollers, and the yarn group B feeds the yarn B into the transport pipe 11 of the yarn binding unit 1 by the roller group 31. Further, the yarn feeder 3 supports the yarn binding unit 1. Further, the yarn feed section 3 is movable in the vertical direction (arrow Y _{1 in} FIG. 1) and the horizontal direction (arrow X _{1 in} FIG. ₁ ) in FIG. For this reason, the yarn binding unit 1 also moves up, down, left and right as the yarn feeder 3 moves. The yarn tensioner 4 is located upstream of the yarn feeding section 3 in the yarn B conveyance path and applies tension to the bound yarn.

The yarn reversing unit 5 includes a yarn gripping chuck 51 for gripping the yarn B, and the yarn gripping chuck 51 is moved in the vertical direction (arrow Y _{2 in} FIG. 1) and the horizontal direction (arrow in FIG. 1). The yarn B is conveyed toward the yarn binding unit 1 by being movable to X ₂ ). Specifically, the yarn reversing unit 5 includes a cylinder 5A that is slidable in the vertical direction and a cylinder 5B that is slidable in the horizontal direction. A thread gripping chuck 51 is disposed at the tip of the cylinder 5A. The tip of the cylinder 5B is integrated with a unit that supports the cylinder 5A. That is, the cylinder 5A and the cylinder 5B allow the yarn gripping chuck 51 to move up and down and left and right in FIG.

  Further, as shown in FIG. 3, the stator S that is a bound body is in a state in which a coil C is wound around the stator core SC, and a lead wire L is drawn from the coil end portion. The coil end portion is formed into a predetermined shape when the coil C is inserted into the slot of the stator core Sc. The lead wire is a composite wire in which a plurality of windings (enamel wires) are bundled, and an insulating sleeve is inserted.

  Next, the operation of the thread binding device 100 of this embodiment will be described. In addition, the stator S is previously arranged on the table 9. Further, the yarn B supplied from the yarn bobbin 2 is conveyed to the yarn feeding unit 3 via the yarn tensioner 4. Further, the push rod 6 and the push plates 7A and 7B are in a state of being separated from the thread binding unit 1 respectively.

  First, as shown in FIG. 4, the yarn binding unit 1 is adjacent to the stator S so that the yarn binding unit 1 faces the gap between the stator core Sc and the coil C. Then, the yarn B is sent out from the tip end portion of the yarn binding unit 1 and further passed through the gap between the coil C and the stator core Sc (first step). As a result, the tip of the yarn B passes below the coil C and is fed inward of the stator in the radial direction from the coil C.

  Next, as shown in FIG. 5, the yarn gripping chuck 51 moves downward and grips the vicinity of the tip of the yarn B (second step). That is, horizontal positioning is performed by sliding the cylinder 5B of the thread reversing unit 5, and the thread gripping chuck 51 is moved into a region surrounded by the coil end of the stator S by sliding the cylinder 5A downward. And the front-end | tip part of the thread | yarn B sent by the 1st step is hold | gripped.

  Next, as shown in FIG. 6, the yarn gripping chuck 51 moves upward (third step). That is, the cylinder 5A of the yarn reversing unit 5 is retracted upward. Thereby, the front-end | tip part of the thread | yarn B moves upwards rather than a coil end part.

  Next, as shown in FIG. 7, the yarn gripping chuck 51 moves toward the yarn binding unit 1 (fourth step). That is, the cylinder 5B of the yarn reversing unit 5 is retracted toward the yarn binding unit 1 side. Thereby, the front-end | tip part of the thread | yarn B straddles a coil end part, and moves to the outer side of the stator radial direction rather than the coil C. FIG.

  Next, as shown in FIG. 8, the push rod 6 moves toward the thread binding unit 1. Specifically, after moving in the depth direction in FIG. 8, the yarn B is moved downward (that is, the yarn binding unit 1 side) while pressing the yarn B. Then, the thread B is pressed against the thread binding unit 1 by the push bar 6 through the support bar 60 (fifth step). As a result, the yarn B has a loop shape surrounding the coil end.

  Further, as shown in FIG. 9, the thread gripping chuck 51 pulls the thread B while the push bar 6 presses the thread B. As a result, the yarn B moves to the gap between the transport tube 11 and the rotating plate 13. After the movement of the yarn B, the yarn gripping chuck 51 releases the tip of the yarn B. In addition, the push rod 6 is retracted from the transport pipe 11 as the yarn gripping chuck 51 is released.

  Next, as shown in FIG. 10, the rotating member 12 starts to rotate (sixth step). By the rotation of the rotating member 12, the rotating plate 13 attached to the rotating member 12 rotates around the transport pipe 11. The leading end of the yarn B is released from the yarn gripping chuck 51 and enters the gap between the rotating member 12 and the conveyance tube 11. When the rotating plate 13 rotates, the leading end of the yarn B moves along with the rotation. It is wound around the transport tube 11. The number of turns is not limited.

  Next, as shown in FIG. 11, the push plate 7A moves horizontally toward the tip of the thread binding unit 1 (seventh step). Specifically, in the axial direction of the transport pipe 11, the push plate 7 </ b> A moves so that the tip of the push plate 7 </ b> A is at the same position as the outlet end of the transport pipe 11. As a result, the tip of the yarn B hanging from the transport pipe 11 moves toward the tip of the yarn binding unit 1.

  Next, as shown in FIG. 12, the push plate 7B having a sharp tip moves upward toward the gap between the transport tube 11 and the tip chuck 14, that is, the mouth of the tip chuck 14 (eighth step). As a result, the tip of the yarn B is conveyed to the mouth of the tip chuck 14. In other words, the tip of the yarn B is sent out to the mouth of the tip chuck 14 by the push plates 7A and 7B. Then, by closing the tip chuck 14 in this state, the tip chuck 14 grips the tip of the yarn B. After the yarn B is chucked, the push plate 7A and the push plate 7B are retracted.

  Next, as shown in FIG. 13, the rotating member 12 is slid toward the tip chuck 14 (9th step). Specifically, the rotating member 12 is slid until the end of the rotating member 12 straddles the tip chuck 14. As a result, the yarn B wound around the transport pipe 11 is pushed out and passes through the tip of the yarn B gripped by the tip chuck 14. And the part by which the thread | yarn B was extruded, ie, the part wound, shrinks, and becomes a knot.

  Next, as shown in FIG. 14, the yarn binding unit 1 is retracted from the stator S (tenth step). By retracting the yarn binding unit 1, the knot formed in the ninth step moves toward the coil end and the knot is further shortened. Thus, the coil end of the stator S is bound by the yarn B.

  Note that the binding force may be insufficient in the case of thread binding up to the tenth step. In that case, as shown in FIG. 15, after the tip chuck 14 is released, the thread binding unit 1 is swung vertically. Thereby, the knot of the yarn further moves toward the coil end, and the loop of the yarn B can be tightened. Therefore, sufficient restraining force can be obtained.

  As described in detail above, in the yarn binding device 100 of the present embodiment, first, the yarn binding unit 1 is opposed to the stator S, and the yarn B is sent out from the yarn binding unit 1 by the roller group 31, and the yarn B is placed under the coil C. I will pass it to the side. Thereafter, the yarn tip is gripped by the yarn gripping chuck 51, and the yarn B is passed over the coil C. Thereby, a loop of the thread B surrounding the coil C can be formed (loop forming step).

  Then, the thread B is pressed against the transport pipe 11 by the push rod 6, the thread gripping chuck 51 pulls the thread B, and the thread B moves to the gap between the rotational plate 13 and the transport pipe 11. It is supposed to rotate. As a result, the tip of the yarn B is wound around the transport pipe 11. Thereafter, the tip end of the yarn B is sent out to the tip chuck 14 disposed at the tip of the transport pipe 11 by the push plates 7A and 7B, and the tip end of the yarn is gripped by the tip chuck 14. Furthermore, when the rotating member 12 slides in this state, the yarn B wound around the transport pipe 11 is taken out. Thereby, the knot of the thread B can be formed (knot forming step).

  The yarn binding unit 1 is withdrawn from the stator S while the tip end portion of the yarn B is held by the tip chuck 14. As a result, the knot is shortened and the knot approaches the coil C. That is, the coil C in the loop of the yarn B is tightened (tightening step).

  That is, the thread binding device 100 of this embodiment can perform all of the loop forming step, the knot forming step, and the tightening step, and can firmly tighten and restrain the coil C. Therefore, a thread tying device and a thread tying method capable of smoothly binding the object to be bound with the thread are realized.

  Further, the thread binding unit 1 swings further up and down after releasing the tip chuck 14 after retreating. Thereby, even if the restraining force is insufficient only by the backward movement of the thread binding unit 1, the coil C can be further tightened. Therefore, it can restrain more firmly.

  The yarn feeding unit 3 feeds the yarn by the roller group 31. That is, if the yarn is to be conveyed by an air flow as in the prior art, it is difficult to adjust the yarn conveyance speed when the yarn material is changed. In some cases, parts must be replaced. However, when the yarn is conveyed by the roller group 31, it is possible to cope with the change of the yarn by adjusting the servo motor that is the driving source of the roller group 31. Therefore, adjustment is very easy and there is no need to replace parts.

  Note that this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof. For example, in the present embodiment, the yarn feeder 3 swings in the vertical direction, but the moving direction is not limited to the vertical direction. That is, you may rock | fluctuate in the depth direction (horizontal direction) of FIG. Further, it may be swung in both the vertical direction and the horizontal direction.

  Moreover, in this Embodiment, although the thread | yarn binding apparatus 100 and the table 9 are made into a different body, the table which supports a to-be-bound object may be integrated. Further, in the embodiment, the yarn binding unit 1 is movable by moving the yarn feeding unit 3 up, down, left and right, but the yarn binding unit 1 may be movable alone.

  Further, in the present embodiment, the push rod 6 and the push plates 7A and 7B are attached to the thread binding unit 1, but each may operate separately from the thread binding unit 1. Moreover, you may provide the notch for making it easy to catch the thread | yarn B in each front-end | tip part of the push rod 6 and the push plates 7A and 7B.

  In the present embodiment, the yarn B is wound around the transport tube 11 by the push rod 6 and the rotating plate 13 attached to the rotating member 12. However, these are examples of the means for winding the yarn B. It is not limited. For example, the thread B can be wound around the transport pipe 11 by attaching a member capable of gripping the thread B to the rotating member 12 and rotating the rotating member 12 while gripping the thread B.

  In this embodiment, the yarn B is fed to the chuck portion of the tip chuck 14 by the push rods 7A and 7B. However, these are examples of the yarn B feeding means, and the present invention is not limited thereto. For example, a member for gripping the tip end portion of the yarn B is provided, and the yarn B is also fed to the chuck portion of the tip chuck 14 by rotating around the chuck portion of the tip chuck 14 while the member grips the yarn B. Can do.

It is a figure which shows the outline | summary of the thread | yarn binding device concerning embodiment. It is a figure which shows the structure of the thread binding unit of a thread binding apparatus. It is a figure which shows the outline | summary of a stator. It is a figure (1st step: insertion of a thread | yarn) which shows the thread | yarn tying procedure of a thread tying apparatus. It is a figure (2nd step: holding | grip of a thread | yarn tip) which shows the thread | yarn tying procedure of a thread | yarn tying apparatus. It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (3rd step: Upward movement of a thread | yarn tip). It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (4th step: Yarn tying unit side movement of a thread | yarn tip). It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (the 1st of the 5th step 1: pressing of a thread | yarn). It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (the 2nd of the 5th step: pinching of a thread | yarn). It is a figure (6th step: thread winding) which shows the thread | yarn tying procedure of a thread | yarn tying apparatus. It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (7th step: the conveyance pipe exit side movement of a thread | yarn tip). It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (8th step: holding | grip of a thread | yarn tip). It is a figure (9th step: taking out a thread | yarn) which shows the thread | yarn tying procedure of a thread tying device. It is a figure which shows the thread | yarn tying procedure of a thread | yarn tying apparatus (10th step: retreat of a thread tying unit). It is a figure which shows the thread | yarn binding procedure of a thread | yarn tying apparatus (11th step: Up-and-down movement of a thread tying unit).

Explanation of symbols

1 Yarn Tying Unit 11 Conveying Pipe (Thread Conveying Pipe)
12 Rotating member (yarn winding part, thread take-out part)
13 Rotating plate (yarn winding part: rotating plate)
14 Tip chuck (thread gripping part)
2 Thread bobbins (thread supply section)
3 Yarn feed section (first thread feed section)
31 Roller group (first thread feeding section)
5 Yarn reversing unit (yarn return part)
51 Yarn gripping chuck (yarn return part)
6 Push rod (thread winding part: thread pressing part)
7A push rod (second thread feed section: axial feed member)
7B push rod (second thread feed section: orthogonal feed member)
9 Stator mounting table 100 Yarn binding device S Stator C Coil (bound object)

Claims (9)

In a thread-binding device that binds an object to be bound with a thread,
A yarn supply section for supplying yarn;
A yarn conveying pipe disposed so as to be capable of advancing and retreating with respect to the bound body;
A first yarn feed unit that feeds the yarn supplied from the yarn supply unit to the lower side of the bound body through the inside of the yarn transport pipe;
A yarn turn-back portion for turning back the yarn passed through the lower side of the bound body by the first yarn feeding section through the upper side of the bound body;
A yarn winding portion for winding an end portion of the yarn folded by the yarn folding portion around the yarn conveyance pipe;
A yarn gripping part that is positioned at the yarn outlet end of the yarn conveying pipe and grips the yarn;
A second yarn feeding portion that conveys a tip portion of the yarn wound around the yarn conveyance tube by the yarn winding portion toward the yarn gripping portion;
A yarn take-out section that is located on the yarn conveyance pipe and is slidably disposed in the axial direction of the yarn conveyance pipe, and that takes out the yarn wound around the yarn conveyance pipe by the yarn winding section from the yarn conveyance pipe; Have
With the yarn gripping part gripping the yarn, the yarn take-out part and the yarn transport pipe are slid to take out the yarn wound around the thread transport pipe,
The yarn binding device, wherein the yarn conveying pipe retracts from the bound body in a state where the yarn take-out portion takes out the yarn and the yarn gripping portion grips the tip of the yarn. In the yarn binding device according to claim 1,
The yarn binding device, wherein the yarn conveying tube is swingable in at least one of a vertical direction and a horizontal direction. In the yarn binding device according to claim 1 or 2,
The yarn winding portion is
A yarn pressing unit that presses the yarn folded back by the yarn folding unit against the yarn transport pipe, leaving the end thereof;
A yarn binding device, comprising: a rotating plate that is rotatably arranged with a predetermined gap on an outer periphery of the yarn conveying pipe, and starts rotating in a state where the yarn is arranged in the gap. In the yarn binding device according to any one of claims 1 to 3,
The second yarn feeder is
It is located below the yarn conveyance pipe, is movably disposed along the axial direction of the yarn conveyance pipe, and is arranged at the yarn outlet end of the yarn conveyance pipe in a state where the yarn is wound around the yarn conveyance pipe. An axial feed member that moves toward the
An orthogonal position that is positioned below the yarn gripping portion and is movably disposed in a direction orthogonal to the axial direction of the yarn conveying pipe, and moves toward the yarn gripping portion after the axial feed member has moved. A yarn binding device comprising a direction feeding member. In the yarn binding device according to any one of claims 1 to 4,
The yarn binding device, wherein the yarn gripping portion is disposed so as to be able to come into contact with and separate from an exit end of the yarn of the yarn transport pipe, and grips the yarn by sandwiching the yarn between the exit end. In the yarn binding device according to any one of claims 1 to 5,
The first yarn feeding section feeds a yarn by a roller. In a thread binding method for a thread binding device that includes a thread transport pipe through which a thread is transported and that binds a body to be bound with a thread,
A yarn feeding step in which the exit end of the yarn of the yarn conveying pipe is opposed to the bound body, the yarn is sent out from the exit end, and the yarn is passed under the bound body;
A folding step of passing the yarn fed in the yarn feeding step through the upper side of the bound body;
A winding step of winding the yarn returned in the folding step around the yarn conveyance pipe;
A yarn tip gripping step in which a yarn gripping portion disposed at an exit end of the yarn of the yarn transport pipe grips the tip of the yarn wound around the yarn transport pipe in the winding step;
A yarn take-out step of taking out the yarn wound around the yarn conveyance tube from the yarn conveyance tube in a state where the yarn tip portion is grasped in the yarn tip portion grasping step;
And a tightening step of tightening the bound body by retracting the thread conveying tube with the thread gripping part gripping the leading end of the thread after the thread is picked up by the thread picking step. Yarn binding method. In the thread binding method according to claim 7,
In the tightening step, the yarn conveying pipe swings in at least one direction of the vertical direction or the horizontal direction. In the thread binding method according to claim 7 or claim 8,
In the yarn feeding step, the yarn is tied up by a roller.

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