JPS6217031Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) In the process of molding a slide fastener with a piece of cloth to be attached to the front part of pants or the back part of a dress, a slide fastener chain having a continuous row of elements is formed to a predetermined length. Continuously sew pieces of cloth, or a slide fastener chain having spaces in which element rows are removed at equal intervals over a predetermined section, and a slide fastener chain having a predetermined length between each space and the width of the fastener chain. Wider pieces of cloth are sewn with a sewing machine, and after sewing, the fastener chain with the cloth pieces is cut at each seam of each piece of cloth, and this invention relates to a cutter device that performs this cutting.

(Prior art) This type of conventional cutter device has an upper blade installed in the head of the sewing machine so that it can move up and down using a cylinder, and a lower blade fixed to the base of the sewing machine. After the piece of cloth is sewn, the end of the piece of cloth is aligned with the lower blade and the upper blade is lowered to cut. When fixing the blade, it is installed by taking into account the deflection and adjusting it to match the upper blade, but in reality it is difficult to align the lower blade, and the clearance between the upper and lower blades increases, resulting in poor cutting quality. It was hot.

(Purpose of the invention) This invention was devised in order to solve the above-mentioned difficulties with the conventional method.When the upper blade descends, the upper blade is moved toward the lower blade. A slide designed to reduce the clearance by pressing to improve cutting quality, and to allow the left and right sides of the upper blade in the width direction to be pressed against each other individually even if the upper blade happens to be out of parallel with the lower blade. To provide a cutter device that is attached to a sewing machine that sews pieces of cloth to a fastener chain.

(Structure of the invention) The cutter device attached to the sewing machine that sews pieces of cloth to the slide fastener chain according to this invention is composed of an upper blade and a lower blade that move up and down. A pair of pressing plates are provided opposite each other so as to be movable toward and away from each other, and a stopper is provided protruding from each pressing plate to maintain an interval between the lower blade and each pressing plate that is approximately the same as or slightly narrower than the thickness above the tip of the upper blade. , and each pressing plate is biased toward the lower blade by a spring.

(Example) Fig. 4 shows an example of the object to be cut.The fastener chain 1 is provided with spaces 3 in which predetermined sections of the element rows 2 are removed at equal intervals. First, a piece of cloth 4 made of a fly whose length is wider than the width of the fastener chain 1 and extends between the centers of each space 3 in the longitudinal direction is sewn from a sewing machine with its tip located approximately at the center of the space 3. The fastener chain 1 is sewn on one side, and the cutting position 5 is the seam between the sewn front and rear cloth pieces 4.

The apparatus of the present invention is shown in FIGS. 1 to 5. In FIG. 1, 6 is a sewing machine head, and 7 is a sewing machine head.
8 indicates a needle, 8 indicates a press surfboard, 9 indicates a base of a sewing machine, and arrow 10 indicates a sewing direction. Therefore, the upper blade 11 and the lower blade 12 are provided on the sewing machine's sewing and delivery side.

As shown in FIG. 2, the upper blade 11 is made of a vertically elongated plate, and has protrusions 13, 13 hanging down on both sides of the lower end, and the center part in the width direction is higher between the protrusions 13, 13 on the lower end surface. There is a notch in the shape of a mountain, and a blade 1 is provided at the corner of the notched bottom surface and the upright surface facing the lower blade 12.
4 is formed. Furthermore, both protrusions 13, 13 are the first
As clearly shown in the figure, the thickness is tapered.

The means for attaching the upper blade 11 is to attach the casing 16 to a support 15 that projects rearward from the sewing machine head 6 with its lower end facing toward the lower blade 12, and to attach the cylinder 17 to the upper part of the casing 16 with a piston rod 18. The piston rod 18 is inserted into the casing 16 and the upper blade 11 is fixed thereon.
As shown in the figure, even at the upper limit, the lower end of the upper blade 11 protrudes downward from the casing 16.

Further, the upper blade 11 is provided with a safety device 19. The safety device 19 includes a sliding plate 21 that is movable up and down along a guide 20 provided on the outer surface of the casing 16 using a cylinder 22 that is separate from the cylinder 17, and a sensing plate 23 at the lower end of the sliding plate 21. The upper blade 11 is provided in a penetrating state, and a contactor 24 is further provided protruding from the middle part of the sliding plate 21 in the height direction,
A limit switch 2 is connected to the lower part of the casing 16 by lowering the contactor 24 and generates an electric signal.
5 is fixed, and the upper blade 11 is lowered by a signal from the switch 25.

Next, the lower blade 12 is formed with a chip having approximately the same width as the upper blade 11, and is fixed to the upper end of a base plate 26 fixed to the rear surface of the base 9 of the sewing machine in an inclined manner parallel to the upper blade 11. This is what I did. If the upper blade 11 that has abnormally descended in opposition to the lower blade 12 is not parallel to the lower blade 12 or parallel to the lower blade but is separated from the lower blade, the upper blade 11 is pressed toward the lower blade 12. There are means available.

This means includes brackets 27, 27 protruding from the left and right sides of a base plate 26 to which the lower blade 12 is fixed, a pair of pressing plates 28, 29 arranged left and right between the brackets 27, 27, and a support shaft inserted through the lower end of the brackets 27, 27. 30, and each pressing plate 28, 29 is bent into a dogleg shape in cross section as shown in FIG. It has been done. Also, as shown in FIG. 2, the left pressing plate 28
Projecting pieces 31 and 32 are provided at the upper left end of the press plate 29 and the upper right end of the right pressing plate 29, respectively. Furthermore, stoppers 33 and 34 made of adjustment bolts are provided below the bent portions of each of the pressure plates 28 and 29 so as to protrude toward the board 26.
8, 29 and the lower blade 12, a distance is maintained that is approximately the same as or slightly narrower than the thickness above the tip of the upper blade 11. In addition, the substrate 2 is attached to the bent portion of each pressing plate 28, 29.
The pressing plates 28, 29 are urged toward the lower blade 12 by springs 37, 38, which pass through the bolts 35, 36 that protrude from the bolts 35, 36, and are fitted into the bolts 35, 36, respectively. each bolt 3
The strength is adjusted by nuts 39 and 40 screwed into holes 5 and 36.

The cutter device attached to the sewing machine described above, after sewing the cloth piece 4 to the fastener chain 1, aligns the cutting edge position 5 between the front and rear cloth pieces 4, 4 with the lower blade 12,
When the cylinder 22 of the safety device 19 is driven and the sensing plate 23 comes into pressure contact with the lower blade 12 via the fastener chain 1 as shown in FIG. Start. The upper blade 11 is lowered by the drive of the cylinder 17, and as shown in FIG. This is for cutting chain 1.
If a finger or the like accidentally gets caught on the lower blade 12 when the sensing plate 23 is lowered, the millimeter switch 25 is not activated and prevents the upper blade 12 from lowering to ensure safety.

By the way, due to causes such as the bending of the sewing machine head when the upper blade 11 is lowered, the upper blade 11 is
If the pressing plate lacks parallelism with the lower blade 12, and if the pressing plate is a single piece with approximately the same width as the upper blade, it will press only on either the left or right side of the upper blade. Although the sharpness decreases, according to the device according to the present invention, the left and right sides of the upper blade are pressed individually by a pair of left and right pressing plates, so even if the upper blade lacks parallelism, the left and right sides of the upper blade can be reliably pressed. It is something that can be done.

(Effect of the invention) The cutter device attached to the sewing machine that sews cloth pieces to the slide fastener chain according to this invention is composed of an upper blade and a lower blade, and a pair of left and right pressing plates are placed opposite the lower blade. It is provided so as to be able to swing in the approaching and moving directions, and a stopper protruding from each pressing plate maintains a distance between each pressing plate and the lower blade so that the upper blade can enter, and a spring lowers each pressing plate. The force is applied toward the blade, and the lowered upper blade is pressed toward the lower blade by the pressing plate, so the clearance between the upper and lower blades becomes smaller and the fastener chain sharpens with good holes. It is. Also,
Since the pressing plate is divided into left and right parts and presses the upper blade individually, even if the upper blade is not parallel to the lower blade, it will ensure that the left and right parts of the upper blade are facing the lower blade. It is able to cut reliably even if the parallelism of the upper blade is slightly out of order due to pressure, and the situation in which the upper blade is out of parallelism is detected by the state in which the left and right pressing plates are pressed. This makes it possible to easily correct the parallelism of the upper blade.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a cutter device attached to a sewing machine that sews cloth pieces to a slide fastener chain according to this invention, Fig. 2 is a rear view showing the upper and lower blades and a pressing plate, and Fig. 3 is a cross-sectional view showing the arrows in Fig. 1. 4 is a perspective view showing the main parts of the present invention, FIG. 5 is a front view showing the slide fastener chain with a piece of cloth to be cut, and FIG. 6 is a sectional view showing the initial state at the time of cutting. , FIG. 7 is a sectional view showing the state at the end of cutting, and FIG. 8 is a plan view showing the pressing state of the pressing plate when the upper blade is out of parallelism. 1...Slide fastener chain, 2...Element row, 3...Space, 4...Cloth piece, 5...
...Cutting position, 6...Sewing machine head, 9...Sewing machine base, 11...Upper blade, 12...Lower blade, 26...
Substrate, 28, 29...Press plate, 30...Spindle, 3
3, 34...stopper, 37,38...spring.

Claims (1)

[Scope of utility model registration request] A sewing machine that continuously sews pieces of cloth 4 of a predetermined length onto a long slide fastener chain 1 has an upper blade 11 that descends from the upper part of the side where the pieces of cloth 4 are sewn and sent out.
is provided, and when the cutter is mounted with the lower blade 12 fixed to the lower part, a pair of left and right pressing plates 28 and 29 are individually pivotally pivoted toward the lower blade 12 so as to face each other in front of the lower blade 12. , and the distance between the lower blade 12 and each pressing plate 28, 29 is approximately the same as or slightly narrower than the thickness above the tip of the upper blade 11.
A piece of cloth is attached to a slide fastener chain, which is held by stoppers 33 and 34 provided at 8 and 29, and each pressing plate 28 and 29 is biased toward the lower blade 12 by a spring 37 and 38, respectively. A cutter device that is attached to a sewing machine that sews.