JPH0616621Y2 - Thread clamp device for multi-needle sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a thread clamping device for a multi-needle sewing machine that holds an upper thread end that is passed through a needle of a rest needle bar.

[Prior Art] Generally, in a multi-needle sewing machine with an automatic thread trimmer,
When sewing with one needle bar is completed, the upper thread that passes through the stitches of the needle attached to this needle bar is cut to an appropriate length, and the upper thread does not come out from the beginning of sewing at the next sewing, and The end of the upper thread that is left on is not unsightly. In addition, the upper thread end cut when the needle bar is stopped is entangled with the thread being sewn and is not sewn, and the upper thread end does not come out of the needle eye (because the balance is moving). ), Various needle thread end holding devices or needle thread pinching devices have been proposed for pulling up and holding the cut upper thread end with a thread gripping tool so as not to hinder the subsequent sewing.

A typical conventional example (see Japanese Utility Model Publication No. 61-42595) of the multi-needle sewing machine having the needle thread pinching device will be described with reference to FIG. In FIG. 8, a needle bar mounting plate 2 is provided on the head 1, and a needle bar 3 having a needle 4 and a needle bar 3 having a presser 5 are attached to one end of the needle bar mounting plate 2 and the needle bar 3 is attached. A solenoid 7 having a roller 6 is attached to the lower portion of the other end of the rod mounting plate 2. This roller 6 is a bracket 8
One end of a lever 9 mounted so as to be pivotable is contacted, and a rod 10 is attached to the other end of the lever 9. The lower end of the rod 10 is provided with a holding tool 11,
This pressing tool 11 is provided with a spring 12 on the receiving piece 8a of the bracket 8.
It is pressed by. Further, the thread gripping tool 14 is mounted on the mounting member 13 provided at the lower portion of the head 1, and the hook portion 15 is provided at the tip of the thread gripping tool 14.

In the conventional multi-needle sewing machine configured as described above, when sewing with one needle bar is completed and the upper thread is cut, the solenoid 7 is actuated and the roller 6 pushes one end of the lever 9.
As a result, the retainer 11 provided on the rod 10 is attached to the spring 1
It rises against 2 and opens between the bracket 8 and the receiving piece 8a. At that time, the thread clamp 14 is moved in the direction of the arrow, the upper thread hanging from the needle 4 is hooked by the hook portion 15, and the thread clamp 14 returns to its original position so that the upper thread is above the receiving piece 8a of the bracket 8. Placed on. Then, when the solenoid 7 is turned off, the rod 10 is lowered and the spring 1
The presser foot 11 is lowered by 2 and the upper thread is clamped.

[Problems to be Solved by the Invention] However, in this multi-needle sewing machine, the solenoid 7 and the roller 6 must be provided for each lever 9 and rod 10 provided corresponding to the needle bar 3, so that the number of parts is large. There is a problem that the cost becomes high and the device becomes complicated because an electric means for operating each solenoid 7 must be provided.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a thread catching device for a multi-needle sewing machine in which a thread catching member is provided for each needle bar and an opening / closing member is provided on the head at the operating needle position to simplify the device. It is a thing.

[Means for Solving the Problem] In order to achieve the above object, the present invention provides a moving head that moves in parallel to the head, and mounts needles on a large number of needle bars provided on the moving head. A predetermined color thread is applied to each needle, the moving head is moved so as to select a predetermined color in the color thread, and the needle bar is driven to perform multicolor sewing. In a multi-needle sewing machine, a bending portion at both ends is attached to the moving head, and a thread holding substrate to which a friction member or a hard fiber planting sheet is adhered, and a thread holding substrate above the thread holding substrate corresponding to the needle bar. A large number of thread clamping members that are movably provided so that their tips are in pressure contact with the thread clamping substrate, and one end of the thread clamping member is near the friction member or the hard fiber planting sheet of the thread clamping substrate. The elastic member attached so that it presses against the An opening / closing member attached to the lower end of the head so as to open the space between the thread clamping member and the thread clamping substrate by pressing the other end of the thread clamping member, and between the thread clamping member and the thread clamping substrate. When opened
A thread gripping tool that grips the thread by passing between the tip of the thread gripping member and the thread gripping substrate is provided. Further, the opening / closing member may be provided with a roller, a sphere, or a spherical body at the lower end. Furthermore, a claw portion may be provided at both ends of one end of the thread holding member.

[Operation] According to the present invention, since the opening and closing of each thread holding member is performed by one opening and closing member, the opening and closing of the thread holding member is reliable. Therefore, when holding the upper thread end, Since there is no added resistance, the upper thread end can be reliably clamped, and since a friction member or a hard fiber planting sheet is provided at the clamping end of the thread clamping member, it can be touched with a slight hand during vibration during operation or during manual work. If
Alternatively, even when the moving head moves for color change, the upper end is securely held by the thread holding member and does not come off. The hardness fiber planting sheet adhered to the rear side of the yarn clamping substrate of the embodiment is for preventing the upper yarn end from coming off until the moving head moves and the yarn clamping member closes.
By providing the claw portions on both sides of one end of the thread gripping member, even if the moving head moves before the thread gripping member is closed, it is possible to reliably prevent the upper thread from coming off.

[Embodiment] Referring to FIGS. 1, 2, and 3, a moving head 17 is provided in parallel with the head 16, and the needle 1 is attached to the moving head 17.
A large number of needle bars 18 and pressers 20 to which 9 are attached are provided. Arms 21a and 21b on both sides of the thread holding substrate 21 are fixed to both sides of the rear portion of the needle bar 18 with screws or the like, and the thread holding substrate 21 is inclined with respect to the moving head 17 so that the front is lowered and the rear is It is constructed by bending slightly downward. In the embodiment, a strip-shaped friction member 23 is provided in front of the thread sandwiching substrate 21 to which one end 26a of the thread sandwiching member 26 is pressed, and a strip-shaped hard fiber planting sheet 22 is provided behind it.
However, instead of the friction member 23, a hard fiber planting sheet may be bonded.

Further, the arms 21a and 21b of the thread holding substrate 21 are provided with 24a on both sides of the elastic member receiver 24 which is inclined so that the rear part thereof is lowered.
The elastic member receiver 24 is bent like 24b.
The bent portions 24a, 24b of the thread holding substrate 21
It is fixed to the arms 21a and 21b on both sides of the same so as to face the thread holding substrate 21. In addition, the bent portion 24 of the elastic member receiver 24
A rotary shaft 25 is passed between a and 24b so that both ends thereof are fixed, and the thread holding member 2 corresponding to the needle bar 18 is attached to the rotary shaft 25.
6 is rotatably mounted, and in the embodiment, the thread holding member 26
Although it is adhered to the friction member 27 at one end 26a thereof, a hard fiber planting sheet may be used depending on the yarn holding substrate 21. A spring 28 is hooked between the thread catching member 26 and the elastic member receiver 24, and a friction member 27 at one end of the thread catching member 26.
Is pressed against the friction member 23 of the thread holding substrate 21. Also,
A mounting seat 30 of the opening / closing member 29 is fixed to the lower end of the head 16, a handle 31 is connected to the mounting seat 30, and an opening / closing tip 32 is attached to the handle 31. This open / close tip 32
Is attached so as to pass above the other end 26b of the thread holding member 26 when the moving head 17 moves.
In this embodiment, a roller 33 is provided on the opening / closing tip 32 as shown in FIGS. Also,
A thread catcher 34 is attached to the head 16 as in the above-described conventional example.

In the yarn gripping device of this embodiment configured as described above, the second
As shown in the figure, when the moving head 17 moves and reaches the position of the needle bar 18 and the needle 19 on which the predetermined color thread is hooked, the roller 33 of the opening / closing tip 32 of the opening / closing member 29 moves the thread holding member 26.
Since the other end 26b of the yarn clamping member 26 is pushed, the other end 26b of the yarn clamping member 26 is pushed, the one end 26a rises, and the yarn clamping substrate 21 is opened. Thereby, when the moving head 17 moves, the upper thread 35 is detached from the thread holding substrate 21 without being caught. Then, when sewing is completed and the upper thread 35 is cut, the thread grasping tool 34 is driven to move between the thread clamping substrate 21 and the one end 26a of the thread clamping member 26 and move to the position indicated by the dotted line in FIG. Then, the upper thread end 35a is hooked to return to the original position. Therefore, the upper thread end 35a is separated from the thread catcher 34, and the upper thread end 35a is hooked on the friction member 23 of the thread holding substrate 21 or the hard fiber planting sheet 22. When the moving head 17 moves, the opening / closing tip 32 of the opening / closing member 29 is disengaged from the thread gripping member 26, and the one end 26a is returned by the spring 28 to the one end 26a of the thread gripping member 26, as shown in FIG. Friction member 2 of the thread holding substrate 21
The upper thread end 35a is clamped between the upper end and the upper end.

In the above embodiment, the open / close tip 32 of the open / close member 29 is provided with the roller 33 as shown in FIGS. 5 (a) and 5 (b), but is provided with the spherical body 36 as shown in FIG. 6 (a). Alternatively, a spherical body 37 may be provided as shown in FIG. 6 (b). Further, when the open / close tip of the opening / closing member 29 is on the other end 26b of the thread catching member 26, the upper thread end 35 causes the thread catching substrate 21 to move.
Since the upper thread end 35a may be disengaged from the thread gripping member 26 when the moving head 17 moves when it is hung on the hook, as shown in FIG. 7, the claw portions 26c are provided on both sides of the one end 26a of the thread gripping member 26. It is possible to prevent the upper yarn end 35a from coming off by providing the.

[Effect of the Invention] Since the present invention is configured as described above, when the opening / closing tip of one opening / closing member moves onto the other end of the thread holding member when it moves to a predetermined needle bar, One of the many thread holding members provided for each needle bar can be reliably opened, and since only one opening / closing member is provided, the number of parts is small, the cost is low, and color change is required. There is an advantage that the upper thread end that is clamped does not come off even when the moving head moves, vibration during sewing, or contact with the hand during manual work.

[Brief description of drawings]

FIG. 1 is a front view of a multi-needle sewing machine provided with a thread pinching device of one embodiment of the present invention, FIG. 2 is a side view of the multi-needle sewing machine of FIG. 1 showing a state in which a thread pinching member is open, and FIG. FIG. 4 is a perspective view of a yarn pinching device of one embodiment of the present invention, FIG. 4 is a side view of the multi-needle sewing machine of FIG. 1 showing a state in which the yarn pinching member is closed, and FIGS. 5 (a) and 5 (b). FIG. 7 is a side view and a front view of the opening / closing member of the present invention shown in FIG. 2, FIGS. 6 (a) and 6 (b) are views showing the opening / closing tip of the opening / closing member of another embodiment of the present invention, and FIG. FIG. 8 is a perspective view of a part of a thread holding member according to another embodiment of the present invention, and FIG. 8 is a side view of a multi-needle sewing machine having a conventional thread holding device. 16 ... Head, 17 ... Moving head, 18 ... Needle bar, 19
...... Needles 19, 20 ...... Presser foot, 21 ...... Thread clamp board, 21
a, 21b ... Bent portion, 22 ... Hard fiber planting sheet, 23 ... Friction member, 24 ... Elastic member receiver, 24
a, 24b ... Arm, 25 ... Rotating shaft, 26 ... Thread clamping member, 26a ... One end, 26b ... Other end, 27 ... Elastic member, 28 ... Spring, 29 ... Opening / closing member, 30 …… Mounting seat, 31 …… Handle, 33 …… Opening and closing tip, 33 …… Roller,
34 ... grab, 35 ... upper thread.

Claims (3)

[Scope of utility model registration request] 1. A moving head that moves in parallel to the head is provided, needles are attached to a large number of needle bars provided on the moving head, and a predetermined colored thread is applied to each needle, and the colored thread is provided. In the multi-needle sewing machine which moves the moving head so as to select a predetermined color and drives the needle bar to perform multicolor sewing, the bending parts at both ends are attached to the moving head. And a thread holding substrate to which a friction member or a hard fiber planting sheet is adhered,
A large number of thread holding members, which are rotatably provided on the upper side of the thread holding substrate so as to correspond to the needle bars, and whose tips are in pressure contact with the thread holding substrate, and one end of the thread holding member. An elastic member mounted so as to be in pressure contact with the vicinity of the friction member or the hard fiber planting sheet of the thread clamping substrate and the other end of the thread clamping member corresponding to a predetermined needle bar operating position are pressed to clamp the thread clamping An opening / closing member attached to the lower end of the head so as to open a space between a member and the thread clamping board; and when the thread clamping member and the thread clamping board are opened, the tip of the thread clamping member and the thread clamping board A thread gripping device for a multi-needle sewing machine, comprising: a thread gripping tool that passes between substrates and grips a thread. 2. The thread pinching device for a multi-needle sewing machine according to claim 1, wherein the opening / closing member is provided with a roller, a sphere or a sphere at the lower end. 3. The thread pinching device for a multi-needle sewing machine according to claim 1, wherein the thread pinching member is provided with claw portions at both ends of one end.