JPH0621432Y2 - Yarn cutting device for bobbin winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a yarn cutting device that is used in a yarn winding machine that is attached to an industrial sewing machine and winds a yarn on a bobbin.

(Prior Art) Conventionally, as a bobbin winding machine equipped with a thread cutting device, the actual machine was 63-37
There is one disclosed in Japanese Patent No. 183, the yarn winding machine comprises a yarn feeding guide provided at one end of a base plate attached to the sewing machine, and a yarn winding mechanism provided at the other end of the base plate, The yarn winding mechanism comprises a swinging arm mounted on a base plate so that the swinging arm is provided with a winding shaft at its upper end, and a pulley is fixed to one end of this winding shaft. A bobbin is mounted on the sewing machine, the pulley is brought into contact with the driving belt of the sewing machine, and the bobbin is driven to rotate together with the pulley, whereby the yarn sent through the yarn feeding guide is wound on the bobbin. In addition, the yarn winding mechanism automatically swings the swing arm when the amount of the yarn wound around the bobbin reaches a certain amount to separate the pulley from the drive belt and the pulley to the base plate. An automatic stop mechanism is provided that abuts the upper stopper to stop the winding of the yarn. The yarn cutting device is arranged between the yarn winding mechanism and the yarn feeding guide. In the yarn cutting device, a support shaft is provided on a support fixed to a base plate so as to project upward, and a regulation member having a regulation piece located on one side of the yarn is fixed to the support shaft and the cutter and the cutter are provided. A cutter holder provided with a holding piece that engages with the restricting piece is rotatably mounted, and a connecting rod that connects the cutter holder and the automatic stop mechanism is provided. The cutter holder is used when winding a yarn on a bobbin. Is located on the side opposite to the thread restricting piece, and when winding of the thread is completed, the cutter holder is rotated in conjunction with the operation of the automatic stop mechanism, the cutter moves to the side of the restricting piece, and the thread is cut. At the same time, the yarn end on the yarn feed guide side is clamped by the clamping piece of the cutter holder and the regulation piece of the regulation member.

(Problems to be Solved by the Invention) In the conventional device, when the winding of the yarn is completed, the cutter is moved in association with the operation of the automatic stop mechanism. Since it is necessary to adjust the timing so that the thread is cut when the bobbin stops rotating after the bobbin is removed, the structure of the thread cutting device becomes complicated and the manufacturing is difficult and the cost is high. Also,
Since the cut thread feed guide side thread end is clamped by the restriction piece and the clamping piece that moves together with the cutter, when the thread end is clamped, the thread between the clamping piece and the restriction piece is Must be adjusted so that they cannot be clamped so that they cannot be clamped, and they do not interfere with each other. The adjustment is difficult, and since the cutter is exposed, it is also dangerous.

Then, this invention aims at providing the thread cutting device which solves the said problem.

(Means for Solving the Problem) The technical means taken by the present invention to achieve the above-mentioned object is to wind the bobbin 22 to wind the yarn 23 fed from the yarn feed guide 3 onto the bobbin 22. A yarn cutting device for a yarn winding machine, comprising a cutter 27 between the take-up mechanism 10 and the yarn feeding guide 3, and the bobbin 22 being detachable in a lateral direction substantially orthogonal to the yarn feeding direction with respect to the yarn winding mechanism 10. The side of the thread 23 stretched between the thread winding mechanism 10 and the thread feed guide 3 is located laterally of the bobbin 22 in the direction of removal of the bobbin 22, and faces the thread 23 and extends from the lower side to the upper end of the bobbin 22. A cutter holder 28 having a guide surface 33 that is inclined to the upper surface of the cutter holder 28, and a pressing body 29 that contacts the upper surface of the cutter holder 28 and has a lower surface protruding in the mounting direction of the bobbin 22 from the upper surface of the cutter holder 28 are provided. The blade portion 37 faces the thread 23 side across the body 29. Forming a housing portion 39 for housing the cutter 27 so as,
A head bolt 41, which penetrates the pressing body 29 from above and is screwed into the cutter holder 28, is provided on the side of the storage portion 39 where the non-thread 23 is arranged. The upper end of the bolt 41 is attached to the head 41a of the bolt 41. A coil spring 44, which abuts and abuts the lower end abuts the receiving portion 43 provided on the pressing body 29 side, is fitted, and a gap is formed between the upper surface of the cutter holder 28 and the lower surface of the pressing body 29 on the bobbin 22 side from the storage portion 39. There is a point that 46 is provided.

(Operation) When the bobbin 22 is attached to the thread winding mechanism 10, the end of the thread 23 fed from the thread stand via the thread feed guide 3 is wound on the bobbin 22, and the bobbin 22 is rotated. Thread on 22
23 is wound up. In this way, when the winding of the yarn 23 onto the bobbin 22 is completed, the bobbin 22 is separated from the yarn winding mechanism 10. Then, by the operation, the thread 23 stretched between the bobbin 22 and the thread feed guide 3 moves to the thread cutting device 26 side, and is inserted between the cutter mounting portion 30 and the pressing body 29 of the thread cutting device 26. Then, the yarn 23 is pressed against the cutter 27 and cut, and the end of the cut yarn 23 on the yarn feed guide 3 side is clamped between the pressing body 29 and the cutter mounting portion 30. As described above, the thread cutting device 26 does not move the cutter 27 and
The structure is such that the blade is moved and pressed against the cutter 27 to cut it, so that the structure is simple and easy to manufacture, and the cutter 27 is positioned inside the storage section 39 and is safe.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Fourth
In FIG. 5 and FIG. 5, reference numeral 1 is a base plate made of a metal plate attached to the sewing machine 2, and a thread feed guide 3 is provided at one end 1A thereof. The thread feed guide 3 has a support shaft 5 fixed to a bracket 4 mounted on a base plate 1, and two pieces 1 are attached to the support shaft 5.
The guide plate 6 and the coil spring 8 of the set are fitted together, and a nut 7 is screwed onto the end of the support shaft 5. Further, a threading hole 9 is formed at the upper end of the bracket 4.

The other end 1B of the base plate 1 has a pair of bearings formed on the base plate 1.
The lower end of the swing arm 13 between the 11 and 11 is the support shaft 5 of the thread feed guide 3.
A swing shaft 14 is swingably mounted via a mounting shaft 12 which is parallel to and a winding shaft 14 parallel to the mounting shaft 12 is rotatably provided at an upper end portion of the swing arm 13. The side of the winding shaft 14 corresponding to the guide plate 6 of the yarn feeding guide 3 is a bobbin from the outside.
22 is a bobbin mounting portion 15 which is fitted and mounted so that it can be freely inserted and removed,
The bobbin 22 is wound around the end of the thread 22 which is fed from the thread stand through the thread passing hole 9 and between the guide plates 6. A pulley 16 is fixed to the winding shaft 14 on the side opposite to the bobbin mounting portion 15. When the pulley 16 contacts a drive belt (not shown) of the sewing machine, the bobbin 22 together with the pulley 16 moves in the direction of arrow C in FIG. It is driven to rotate and the thread is wound. The pulley 16, the swinging arm 13, the winding shaft 14 and the like constitute a yarn winding mechanism 10.

Between the bearing 11 and the swing arm 13, a spring for biasing the swing arm 13 in a direction in which the pulley 16 moves away from the drive belt.
17 are provided. Further, a link connecting portion 18, to which one end of an intermediate link 19 is pivotally connected, is projectingly provided at an upper end portion of the swing arm 13, and the other end of the intermediate link 19 is pivotally connected to a bearing portion 20 on the base plate 1 at a lower end portion. It is pivotally connected to the upper part of the support lever 21 which is also connected to be supported. When the pulley 16 is brought into contact with the drive belt, the intermediate link 19 and the support lever 21 are aligned in a straight line, and when a predetermined amount of the yarn 23 is wound on the bobbin 22, the yarn layer wound on the bobbin 22 is The release lever 24 provided on the intermediate link 19 is pushed by the outer peripheral surface to push up the connecting portion between the intermediate link 19 and the support lever 21, and the urging force of the spring 17 causes the pulley 16 to move.
Is separated from the drive belt, and the pulley 16 is brought into contact with the stopper 25 provided on the other end 1B of the base plate 1 to brake the pulley 16.

A yarn cutting device 26 is arranged between the yarn feeding guide 3 and the bobbin mounting portion 15. As shown in FIGS. 1 to 3, the yarn cutting device 26 includes a single cutter 27, a cutter holder 28, and a pressing body 29. Cutter holder
28 is formed of a synthetic resin or the like, and the upper portion of the cutter holder 28 serves as a cutter mounting portion 30.
The cutter holder 28 has a lower end portion as a mounting portion 31, which is mounted and fixed on the sewing machine 2 (or the base plate 1) via screws 32. In addition, a guide surface 33 is formed on the side of the cutter holder 28 facing the yarn 23 from the midway portion to the upper end portion and is inclined upward toward the bobbin 22 withdrawal side, and the upper end portion of the guide surface 33 is a gentle slope. There is. A storage hole 34 penetrating in the vertical direction is formed at a substantially central portion of the cutter mounting portion 30 in the yarn feeding direction, and a shim 36 is provided in the storage hole 34.
A cutter 27 is arranged together with the cutter 27, and the cutter 27 is attached and fixed by a screw 35 that is screwed and inserted from one side of the cutter mounting portion 30, so that the position of the cutter 27 can be adjusted in the vertical direction. In addition, the cutter 27 has an upper blade 37
Is projected from the housing hole 34 and is attached so as to face the thread 23 stretched between the bobbin 22 and the thread feed guide 3.

The pressing body 29 is made of synthetic resin or the like, and has a cutter mounting portion 30.
Located on the upper side of the recessed portion corresponding to the storage hole 34 in the pressing body 29.
38 is formed, and the upper portion of the cutter 27 is accommodated in the recess 38, and the recess 28 and the accommodating hole 34 constitute the accommodating portion 39. Further, a bolt insertion hole 40 penetrating in the vertical direction is formed in the pressing body 29, and a bolt 41 inserted in the bolt insertion hole 40 is screwed into a screw hole 42 formed in the cutter mounting portion 30. The head 41a of the bolt 41 is freely inserted into the upper portion of the bolt insertion hole 40, and the coil spring 44 is compressed between the head 41a of the bolt 41 and the stepped portion (reception portion) 43 below the bolt insertion hole 41. The coil spring 44
The pressing body 29 is pressed against the cutter mounting portion 30 by the biasing force of the so that the pressing force can be adjusted. The lower surface of the pressing body 29 is in contact with the upper surface of the cutter mounting portion 30 on the side of the thread feed guide 3 and serves as a holding portion 45. A gap 46 is formed.

In the above structure, when the winding of the yarn 23 onto the bobbin 22 is completed, the portion of the yarn 23 stretched between the bobbin 22 and the yarn feeding guide 3 facing the yarn cutting device 26 is slightly below the pressing body 29. When the bobbin 22 is located and is removed from the bobbin mounting portion 15, the yarn 23 is moved to the thread cutting device 26 side by the operation, and is guided by the guide surface 33 so that the pressing body 29 and the cutter mounting portion 30 are It is inserted between the two and is pressed against the cutter 27 to be cut. Then, the cut thread end on the bobbin 22 side is easily separated from between the pressing body 29 and the cutter mounting section 30 via the gap 46, and the thread end on the thread feed guide 3 side is clamped by the clamping section 45. . Since the lower surface of the pressing body 29 facing the thread 23 is projected from the upper surface of the cutter mounting portion 30, when the thread 23 is inserted between the pressing body 29 and the cutter mounting portion 30, the upward separation of the thread 23 is prevented. It is inserted well.

(Effect of the Invention) According to the present invention, the yarn 23 stretched between the yarn winding mechanism 10 and the yarn feeding guide 3 is disposed laterally of the bobbin 22 in the detaching direction.
A cutter holder 28 having a guide surface 33 facing the bobbin 22 from the lower side to the upper end,
A pressing body which is in contact with the upper surface of the cutter holder 28 and whose lower surface projects in the mounting direction of the bobbin 22 from the upper surface of the cutter holder 28.
29 and, from the cutter holder 28 to the pressing body 29,
A storage section 39 for storing the cutter 27 is formed so that the blade section 37 faces the thread 23 side, and a pressing body is provided on the side of the storage section 39 opposite to the thread 23 side.
A headed bolt 41 that penetrates 29 from above and is screwed into the cutter holder 28 is provided, and the bolt 41 has an upper end contacting the head 41a of the bolt 41 and a lower end provided on the pressing body 29 side. Since the coil spring 44 abutting on the portion 43 is fitted and the gap 46 is provided between the upper surface of the cutter holder 28 and the lower surface of the pressing body 29 on the bobbin 22 side with respect to the storage portion 39, the thread cutting device can be made extremely simple. It can be configured and can be provided easily and inexpensively. Further, since the cutter 27 is located inside the storage section 39, it is safe.

Further, by the operation of separating the bobbin 22, the yarn 23 stretched between the yarn feeding guide 3 and the bobbin 22 slides upward on the guide surface 33, and the upward movement of the lower surface of the pressing body 29 is restricted. At the same time, the pressing body 29 is pushed up against the biasing force of the spring 44, and the pressing body 29 is inserted between the pressing body 29 and the cutter holder 28.
The blade 23 is pressed against the blade 37 and cut, and the end of the yarn 23 on the yarn feed guide 3 side is held by being sandwiched between the lower surface of the pressing body 29 and the upper surface of the cutter holder 28. That is, the operation of removing the bobbin 22 also serves as the cutting operation of the thread 23, and although the automatic thread cutting mechanism is not provided, the cutting operation of the thread 23 is not separately required, and When cutting 23, no attention is required.

Further, by screwing the bolt 41 in and out, it is possible to adjust the force for pressing the lower surface of the pressing body 29 against the upper surface of the cutter holder 28, that is, the gripping force of the thread end portion. Not only can the thread end be clamped with an appropriate clamping force for all threads up to the thread,
Even if the elastic force of the spring 44 decreases, the pinching force of the yarn end can be kept constant.

Further, between the upper surface of the cutter holder 28 and the lower surface of the pressing body 29,
Since the gap 46 is provided on the bobbin 22 side from the storage section 39, the closeness of contact between the upper surface of the cutter holder 28 and the lower surface of the pressing body 29 on the side that clamps the yarn end portion is good, and the bobbin 22 side The yarn end moves away from the cutter holder 28 very smoothly.

Also, loosen the bolt 41 and lift the pressing body 29 upward.
By rotating it around 41, the cutter 27 is exposed, and despite the fact that the cutter 27 is stored in the storage section 39, maintenance such as replacement of the cutter 27 or adjustment of hitting of the thread on the blade section 37 is extremely difficult. It can be done easily.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the main part,
Fig. 2 is a sectional view taken along the line II-II in Fig. 1, and Fig. 3 is Fig. 5 II.
FIG. 4 is an overall plan view of the bobbin winder, and FIG. 5 is a side view thereof. 3 ... Thread feed guide, 10 ... Thread winding mechanism, 27 ... Cutter, 30 ... Cutter mounting section, 39 ... Storage section, 44 ... Coil spring.

Claims (1)

[Scope of utility model registration request] 1. A thread feed guide (3) for rotating a bobbin (22).
Between the yarn winding mechanism (10) for winding the yarn (23) sent from the bobbin (22) and the yarn feeding guide (3).
A bobbin (22) having a bobbin (22) detachably attached to the bobbin winding mechanism (10) in a lateral direction substantially orthogonal to the thread feeding direction, wherein the bobbin (22) is detachable from the bobbin winding mechanism (10). The thread (23) stretched between the feed guide (3) and the bobbin (22) is located on the side of the bobbin (22) away from the lower side of the bobbin (22). Cutter holder (28) having a guide surface (33) inclined to
And a pressing body (29) which is in contact with the upper surface of the cutter holder (28) and has a lower surface protruding in the mounting direction of the bobbin (22) from the upper surface of the cutter holder (28). A storage part (39) for storing the cutter (27) is formed so that the blade part (37) faces the thread (23) side over the (29), and the storage part (3
On the non-thread (23) arrangement side of 9), a head bolt (41) that penetrates the pressing body (29) from above and is screwed into the cutter holder (28) is provided, and this bolt (41) has an upper end. Is the head (41a) of the bolt (41)
Between the upper surface of the cutter holder (28) and the lower surface of the pressing body (29) by fitting the coil spring (44) whose lower end is in contact with the receiving portion (43) provided on the pressing body (29) side. Bobbin (22) from storage (39)
A yarn cutting device in a yarn winding machine, characterized in that a gap (46) is provided on the side.