JPH075824Y2 - Cutter device for sewing machine - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention applies feed to a work cloth so that the work cloth passes through a sewing position, and a tape or a work cloth sewn on the work cloth passing through the sewing position. The present invention relates to a sewing machine that cuts continuous empty rings at an end of a work cloth, and particularly to a cutter device therefor.

(Prior Art) Conventionally, when a tape sewn on a work cloth in this type of sewing machine is cut at an end of the work cloth, the work cloth is placed above a fixed blade arranged on the cloth feeding side at the sewing position. When the end of is reached, by rotating the movable blade from the standby position to the cutting position by the rotary solenoid,
It is known that only the tape is cut.

(Problems to be solved by the invention) However, in this conventional device, in order to transmit the power of the rotary solenoid to the movable blade, the output shaft of the solenoid is connected to the movable blade by a link, and the rotation stroke of the output shaft is increased. Since the movable blade is moved from the standby position to the cutting position by using all of the above, noise such as a hitting sound may be generated inside the solenoid at the end of the operation of the solenoid. Further, in order to adjust the cutting position by the double blade and adjust the meshing amount of the double blade, it is necessary to adjust the attachment position of the link within the narrow range between the output shaft and the movable blade, which is troublesome. Not only that, but if the adjustment is incomplete, there is a possibility that the tape may not be cut reliably and that the blade may be spilled.

The present invention has been made in order to solve the above problems, and its purpose is to prevent noise from being generated inside and outside the drive means of the movable blade.
It is an object of the present invention to provide a cutter device for a sewing machine that can easily adjust the cutting position by using both blades.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a fixed blade mounted on a support body disposed on a work cloth support surface and positioned on the cloth feeding side of a sewing position, A movable blade that is movably mounted on the support and that is arranged at a standby position that is separated from the fixed blade and that allows passage of the tape or the like, and a cutting position that cuts the tape or the like in cooperation with the fixed blade, A stopper attached to the support, for setting the cutting position of the movable blade,
An engaging body that is provided on the movable blade or a member that interlocks with the movable blade and that is disengaged from the stopper as the movable blade moves.
An engaging portion between the stopper and the engaging body, the driving means being connected to the movable blade, moving the movable blade toward the cutting position, and returning to the standby position after the engaging body engages with the stopper. Is provided with a shock absorbing member, and the engaging body is engaged with the stopper via the collision absorbing member, and at least one of the stopper and the engaging body is provided with a movable blade. The position adjusting mechanism is provided for adjusting the position of the engaging body moving along with the moving direction of the moving body.

(Operation and effect) Therefore, according to the present invention, the position of at least one of the stopper and the engaging body is adjusted by the position adjusting mechanism.
By adjusting the position along the moving direction of the engaging body that moves with the movement of the movable blade, it is not necessary to use all of the stroke of the drive means to move the movable blade from the standby position to the cutting position, Together with the provision of the shock absorbing member on at least one of the engaging portions of the stopper and the engaging body, it is possible to prevent noise from occurring inside and outside the driving means. Further, since the stopper is provided on the support and the engaging body is provided on the movable blade or the member interlocking with the movable blade, the cutting position of the movable blade can be easily adjusted.

(Embodiment) An embodiment of a decorative sewing machine embodying the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 2 and 3, the needle plate 3 is mounted on the bed portion 2 of the sewing machine frame 1, and the work cloth support surface 2a is constituted by the upper surface of the bed portion 2 including the upper surface of the needle plate 3. There is. Sewing machine frame 1
A needle bar 5 having a plurality of needles 5a at its lower end is supported by an arm portion (not shown) so as to be vertically movable, and penetrates the work cloth C and the tape T supplied to the sewing position on the needle plate 3. The needle
As 5a is moved up and down and the looper in the bed portion 2 is operated, decorative stitches are formed and the tape T is sewn to the work cloth C.

A state in which a presser bar 6 having a presser foot 6a at the lower end is movably supported on the arm portion, the presser bar 6 is arranged at a lower position, and the work cloth C is pressed against the needle plate 3 by the presser foot 6a. Then, the feed dog (not shown) in the bed portion 2 is projected and retracted on the needle plate 3, so that the work cloth C and the tape T are fed. Further, a guide body 7 is attached to the presser foot 6a to engage with the side edge of the tape T and guide the feeding thereof.

As shown in FIGS. 1 (a) and 2, the work cloth support surface 2a
A support 8 is mounted on the top. A support piece 9 extending in a direction orthogonal to the cloth feed direction is formed on the cloth feed side of the support body 8 at the sewing position, and the support piece 9 is arranged in the recess 10 of the bed 2. A fixed blade 11 exposed on the work cloth supporting surface 2a is mounted on the supporting piece 9 in a replaceable manner by a pair of screws 11a. A swing lever 13 is swingably supported in the center of the support 8 by a swing shaft 12 extending in the cloth feed direction, and one arm 13a of the swing lever 13 supports the fixed blade 11. A movable blade 14 that cuts the tape T in cooperation with each other is replaceably attached by a pair of screws 14a. By placing the swing lever 13 and the movable blade 14 at the standby position shown by the solid line in FIG. 1 (a), passage of the work cloth C and the tape T between the two blades 11 and 14 is allowed, and By disposing the movable lever 13 and the movable blade 14 at the cutting position shown by the chain double-dashed line in FIG.
Is disconnected.

A rotary solenoid 16 is mounted on the standing wall 15 of the support body 8, and a connecting link 18 is attached to an output shaft 17 of the support body 8 at its base end by a screw 18a. A connecting shaft 19 is projectingly provided at the tip of the connecting link 18, and a long hole 20 is formed at the end of the other arm portion 13b of the swing lever 13 so that the connecting shaft 19 is formed.
Are slidably engaged with the slot 20. A spring 21 is mounted between the connecting link 18 and the upright wall 15, and the urging force of the spring 21 urges the swing lever 13 and the movable blade 14 toward the standby position. The rotation of the output shaft 17 of the rotor solenoid 16 resists the urging force of the spring 21 and connects the connecting link.
The swing lever 13 and the movable blade 14 are swung via the 18 from the standby position to the cutting position.

The standing wall 15 is opposed to the other arm 13b of the rocking lever 13.
A shaft-shaped stopper 22 for setting the cutting position of the rocking lever 13 is projected on the upper part of the, and a cylindrical shock absorbing member 23 made of rubber or the like is mounted on the outer periphery thereof. An engaging body 25 formed by bending a metal plate into a substantially L-shaped cross section is attached to an intermediate portion of the other arm portion 13b of the swing lever 13.
That is, the engaging body 25 is formed with an engaging portion 25a that can be engaged with and disengaged from the impact absorbing member 23, and a mounting plate portion 25b for attaching the engaging body 25 to the other arm 13b. The mounting plate portion 25b has a pair of adjustment holes 2 extending parallel to the width direction of the other arm portion 13b.
6 is formed, and by a pair of adjusting screws 27 penetrating each adjusting hole 26 and screwed to the other arm 13b, the engaging body 25 moves in the width direction of the swing lever 13, that is, as the movable blade 14 moves. The position of the engaging body 25 is adjusted so that the position of the engaging body 25 can be adjusted. The adjusting hole 26 and the adjusting screw 27 constitute the position adjusting mechanism of the present invention. Then, by adjusting the mounting position of the engaging body 25, the rotary solenoid 16
The swing angle of the swing lever 13 from the standby position to the cutting position is adjusted so that the entire rotation stroke of the output shaft 17 is not used.

In the sewing machine configured as described above, when the tape T is sewn on the work cloth C, the rotary solenoid 16 is held in a demagnetized state, and the urging force of the spring 21 causes the swing lever 13 and the movable blade to move. 14 is held at the standby position shown by the solid line in FIG. And movable blade 14 and fixed blade
The work cloth C and the tape T are sent to the cloth delivery side through the space between the work cloth 11 and the cloth 11.

When sewing of the tape T to the work cloth C is completed and the end portion Ca of the work cloth C passes through the sewing position and reaches the fixed blade 11, the rotor solenoid 16 is excited and its output shaft 17 is output.
The rotation of the swing lever 13 resists the urging force of the spring 21, and the swing lever 13 and the movable blade 14 are moved to the first position via the engagement between the connecting shaft 19 of the connecting link 18 and the elongated hole 20 of the swing lever 13. It is swung to the cutting position side indicated by the two-dot chain line in FIG.

Then, before the output shaft 17 is rotated to the end of its rotation stroke, the engaging body 25 is engaged with the shock absorbing member 23 on the stopper 22, and the swing of the swing lever 13 and the movable blade 14 is restricted. Then, these 13 and 14 are arranged at the cutting position shown by the two-dot chain line in FIG. At this time, the movable blade 14 is supported by the support piece 9.
The fixed blade 11 is reliably meshed with the fixed blade 11 without colliding with the fixed blade 11. Therefore, the tape T is surely cut by the both blades 11 and 14 without causing the blades 11 and 14 to spill. Then, when the rotary solenoid 16 is demagnetized,
The urging force of the spring 21 causes the oscillating lever 13 to return and oscillate via the connecting link 18, and the oscillating lever 13 and the movable blade 14 return to the standby position.

Then, in this embodiment, loosening the pair of adjusting screws 27,
By adjusting the mounting position of the engaging body 25, the movable blade 14 can be operated without using the entire rotation stroke of the rotary solenoid 16, so that noise is not generated in the rotary solenoid 16. Further, since the engaging body 25 is engaged with the shock absorbing member 23 on the stopper 22 during the cutting operation, noise is not generated even outside the rotary solenoid 16.

Furthermore, since the engagement body 25 is mounted on the outer side surface of the swing lever 13, the attachment position of the engagement body 25 can be adjusted very easily when the movable blade 14 is assembled or replaced. Further, in this embodiment, when performing the ground stitching in which the decorative stitches are directly formed on the work cloth, the empty ring continuing to the end of the work cloth can be cut at the end of the work cloth.

The invention is not limited to the above embodiment,
It is also possible to embody the following aspects.

(A) Instead of the rotary solenoid 16, use a solenoid or an air cylinder equipped with a plunger that reciprocates on one axis.

(B) Attach a shock absorbing member to the engaging body 25.

(C) Install the stopper 22 so that its position can be adjusted.

(D) Attaching an engaging body to the movable blade 14 itself.

[Brief description of drawings]

FIG. 1 (a) is a front view showing a cutter device of a sewing machine embodying the present invention, FIG. 1 (b) is a partial front sectional view showing a mounting state of an engaging body in the cutter device, and FIG. A partial plan view and FIG. 3 are partial sectional views. 2a ... Work cloth support surface, 8 ... Support body, 11 ... Fixed blade, 13 ... Swing lever, 14 ... Movable blade, 16 ... Rotary solenoid, 21 ...
A spring (driving means is constituted by the above-mentioned 16, 21), 23 ... Impact absorbing member, 25 ... Engaging body, 26, 27 ... Adjusting holes and adjusting screws constituting position adjusting mechanism, C ... Work cloth, T
…tape.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyasu Iwakoshi 9-35 Hotta-dori, Mizuho-ku, Aichi Prefecture, Nagoya, Brother Industry Co., Ltd. (56) References: 62-30778 (JP, U) 62-33779 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A tape (T) or a work cloth (C) sewn to the work cloth (C) which is fed to the work cloth (C) so as to pass through the sewing position. In a sewing machine in which a continuous hollow ring is cut at the end of the work cloth (C), the sewing machine is attached to a support body (8) arranged on the work cloth support surface (2a) and is attached to the cloth feeding side at the sewing position. Fixed blades located (11)
And a fixed blade (11) movably mounted on the support (8).
A movable blade (14) which is arranged at a standby position spaced apart from the tape (T) to allow passage of the tape (T) and the cutting position for cutting the tape (T) in cooperation with the fixed blade (11), A stopper (22) attached to the support (8) for setting the cutting position of the movable blade (14) and a movable blade (14) provided on the movable blade (14) or a member (13) interlocking with the movable blade (14). The stopper (2
2) is engaged with and disengaged from the engaging blade (25) and the movable blade (14) to move the movable blade (14) toward the cutting position, and at the same time, the engaging body (25) stops the stopper (22). Drive means (16, 21) for returning to the standby position after engaging with the impact absorbing member (23) on at least one of the engaging portions of the stopper (22) and the engaging body (25). The engaging body (25) is provided through the shock absorbing member (23).
Is configured to be engaged with the stopper (22), and
A position adjusting mechanism (26, 26) for adjusting the position of at least one of the stopper (22) and the engaging body (25) along the moving direction of the engaging body (25) that moves with the movement of the movable blade (14). 27) A cutter device for a sewing machine, which is provided with.