JPS6231104Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a sewing device, and more particularly to a sewing device for successively forming a plurality of spaced cycle stitches on a work fabric.

[Prior art]

Conventionally, this type of device has been equipped with a holding device that holds both ends of the work cloth on the cloth feeding side and the cloth feeding side by pinching the seam forming position of a cycle sewing machine such as a buttonhole sewing machine. The holding device is configured to be moved to the cloth feeding side after forming one cycle stitch, and to place the next stitch forming position on the work cloth opposite to the stitch forming position of the sewing machine.

[Problem that the invention attempts to solve]

In the conventional apparatus described above, in order to hold both ends of the work cloth, it is necessary to adjust the position of the holding device depending on the size of the work cloth. Therefore, when both of the holding devices are configured to be moved by one driving means, there is a problem that the configuration becomes complicated and expensive due to the necessity of the above-mentioned position adjustment.

[Purpose of invention]

The present invention has been devised to solve the above-mentioned problems, and its purpose is to provide an inexpensive sewing device that does not require position adjustment of the workpiece cloth holding means regardless of the size of the workpiece cloth.

[Means for solving problems and their effects]

In the present invention, a work cloth holding means 20 holds one end of the work cloth on the cloth feeding side of the seam forming position of the cycle sewing machine and is moved in a direction away from the seam forming position along the cloth feeding line. established,
On the cloth feeding side of the seam forming position, a guide body is provided on one side of the feeding line, and is provided with a guide surface that extends parallel to the cloth feeding line and can engage with the side edge on the other end side of the processing. Further, a brush wheel is provided at a position facing the guide surface of the guide body and rotatably supported around one axis inclined with respect to the cloth feed line, and the rotation axis of the brush wheel is When the work cloth holding means is moved to the cloth feeding side, it is set relative to the cloth feeding line so as to act on the work cloth and direct its side edges toward the guide surface of the guide body.

With the above solution, the workpiece cloth held by the presser foot during the formation of one cycle seam is released from being held by the presser foot when the cycle seam formation is completed, and is transferred only by the workpiece cloth holding means. Ru. At this time, the brush wheel acts on the work cloth and moves its side edges toward the guide surface of the guide body, so the side edges of the work cloth are always engaged with the guide surface, and the side edges of the work cloth are always engaged with the guide surface, and the side edges of the work cloth are always engaged with the guide surface. The edges are held in a fixed positional relationship.

〔Example〕

Figures 1 to 1 show an embodiment of the present invention in an automatic continuous buttonhole sewing machine that performs buttonhole stitching at intervals on processed fabrics such as the front body of jackets, shirts, etc. The details will be explained with reference to FIG.

In the drawing, the continuous front hole overlocking automatic sewing machine has a sewing machine table 1 and a sewing machine table 1.
The main body of the buttonhole sewing machine (cycle sewing machine) 2 is mounted on the machine. Further, the frame of the main body 2 of the buttonhole sewing machine includes an arm 3 and a bed 4, and the arm 3 supports a needle 5 and a cutter 6 for cutting the buttonhole so as to be movable up and down. A throat plate 9 in which a needle hole 7 and a cutter groove 8 following the needle hole 7 are formed is attached. The falling position of the needle 5 is defined as the stitch forming position of the cycle sewing machine. 10 has a passage hole 11 in the center through which the needle 5 and cutter 6 pass, and a processed cloth 12 such as the front body of a shirt or jacket is inserted into the needle plate 9.
The workpiece cloth 12 is moved in the left-right direction in FIG. 2 by a known feed cam means (not shown) to feed the work cloth 12 in the same direction.

Further, support legs 13 are provided on the sewing machine table 1.
A pair of guide rails 14 extending in the left-right direction in FIGS. 1 and 2 are fixed through the guide rails 14, and a work cloth support stand 15 is slidably supported on the guide rails 14. The work cloth support stand 15 consists of a support base 15a and a work cloth support plate 15b. A rack 16 is fixed to the support base 15a of the work cloth support stand 15, and the rack 16 meshes with a pinion 18 fixed to the output shaft 17a of the pulse motor 17. Further, the pulse motor 17 is connected to the support leg 1.
3 via a mounting plate 19. As the pulse motor 17 is driven, the work cloth support stand 1
5 is moved toward the next buttonhole stitch formation position each time one buttonhole stitch is formed.

As shown in FIGS. 1 and 2, on the right side of the work cloth support plate 15b of the work cloth support stand 15, there is a process for pressing and holding the work cloth 12 onto the work cloth support plate 15b. A cloth holding means 20 is attached. The work cloth holding means 20 includes a pressing piece 20a that can move up and down between a position where the work cloth 12 is pressed and a release position where the pressing is released, and a drive body 20b for operating the pressing piece 20a.
including.

The cloth support plate 21 is fixed onto the sewing machine table 1 via a mounting body 22, and the cloth support plate 21
On one side of the work cloth feed line (indicated by the line X-X in FIG. 5) passing through the falling point of the needle 5, there is a line extending parallel to the work cloth feed line and on one side of the work cloth 12. Guide surface 2 that engages and guides the work cloth 12
A guide plate 23 having 3a is attached by step screws 24. The hole formed in the guide plate 23 through which the stepped screw 24 passes is formed as a long hole 25 extending in a direction perpendicular to the work cloth feed line, so that the guide plate 23 can be adjusted by moving in the same direction. forgive. Furthermore, there are also step screws 26 and elongated holes 27 on the bed 4.
The guide plate 23 is adjustably attached to the guide plate 23, and a guide surface 28 extending in the same line as the guide surface 23a of the guide plate 23 is formed. 29 is a screw 3 on the work cloth support plate 15b of the work cloth support stand 15.
The right position of the work cloth 12 is regulated by a guide piece fixed at 0.

The mounting plate 3 is attached to the mounting member 22 by screws 31.
2 is fixed, and a support shaft 33 is attached thereto that extends along one axis indicated by Y--Y in FIG. 5, which is inclined with respect to the work cloth feed line XX. A brush wheel 34 is rotatably supported on the support shaft 33. The brush wheel 34 includes a disc-shaped portion 34a,
It consists of a brush part 34b planted around it,
As is clear from FIG. 4, the upper end of the brush portion 34b passes through the elongated hole 35 formed in the cloth support plate 21 and projects slightly beyond the upper surface of the cloth support plate 21 so as to engage with the work cloth 12. It's getting old.

An air jet pipe 36 is attached to the mounting plate 32 and jets air toward the brush wheel 34.

Next, the effect will be explained. Before this automatic sewing machine starts operating, the workpiece cloth support 15 is moved to the left by the action of the pulse motor 17 as shown in FIGS. 1 and 2, and the workpiece cloth holding means 20 is pressed. The piece 20a is in the released position in which it has been moved upward, and the presser foot 10 is also in the raised position.

In order to set the work cloth 12 in this state, one side of the work cloth 12 should be placed at a position where it engages with the guide surface 23a of the guide plate 23 and the guide surface 28a of the guide plate 28, as shown in FIGS. and move the work cloth 12 to the right until the right end of the work cloth 12 engages with the guide piece 30. This completes the setting of the work cloth 12.

When the start switch (not shown) is pressed, the pressing piece 20a is moved by the action of the driving member 20b.
is activated and the right end of the work cloth 12 is placed on the work cloth support stand 1.
5, and then the presser foot 10 of the buttonhole sewing machine main body 2 is lowered. Subsequently,
The buttonhole sewing machine body 2 starts to be driven, and the needle 5 moves up and down in a zigzag motion, and the presser foot 10 is first moved to the right in FIG. 2, then to the left, and presses one button. An overlock seam 37 is formed. After completing the formation of the buttonhole seam 37, the cutter 6 is operated to cut out the buttonhole.

When the formation of one buttonhole seam 37 is completed,
The presser foot 10 is raised, and then the pulse motor 17
By this action, the work cloth support stand 15 is moved to the right, and the work cloth 12 is moved to the position where the next buttonhole seam is to be formed. At this time, the work cloth 12 is engaged with a brush wheel 34 that rotates around the Y-Y line inclined with respect to the work cloth feed line XX, so the edge of the work cloth 12 is attached to the guide plate. 23, 28 guide surface 23
a, 28a. Such action of the brush wheel 34 is made more reliable because air from the air jet pipe 36 acts on the brush wheel 34.

When the workpiece cloth 12 is moved to the next stitch forming position in this situation, the drive of the pulse motor 17 is stopped, the presser foot 10 is lowered again, and the drive of the buttonhole sewing machine main body 2 is started. A buttonhole stitch is formed.

After the required number of buttonhole stitches are formed by repeating these operations, the holding of the pressing piece 20a of the workpiece cloth holding means 20 as well as the workpiece presser foot 10 is released, and the workpiece cloth 12 is transferred to the automatic sewing machine. It can be freely taken out from

Next, a modification will be described with reference to FIGS. 6 and 7. Parts that are the same as those in the embodiment described above will be given the same reference numerals, and the description thereof will be referred to.

In FIG. 6, the brush wheel 34 is arranged above the processing man 10. In this case, in order to facilitate the supply of the work cloth 10, the brush wheel 34 is supported so as to be movable up and down. That is, an intermediate portion of a swinging arm 42 is rotatably supported on a support base 40 via a pin 41, and the brush wheel 3 is attached to one end of the swinging arm 42.
4 is rotatably supported around an axis inclined with respect to the work cloth feed line as shown in the above embodiment.

Further, a tension spring 4 is attached to the other end of the swing arm 42.
3 is tensioned, and normally applies a rotational force in the counterclockwise direction in FIG. Furthermore, the swinging arm 4
An air cylinder 44 is connected to the other end of 2 to raise the brush wheel 34 against the action of the tension spring 43 at the end of sewing.

FIG. 7 shows a brush wheel 34 instead of the air jet pipe 36 in the embodiment shown in FIGS. 1 to 5.
A leaf spring 35 is provided to apply a slight pressing force toward the.

The present invention can be modified in various ways in addition to the embodiment shown in FIGS. 1 to 5 and the modified examples shown in FIGS. 6 and 7.

[Effect of idea]

As described in detail above, the present invention is designed to hold one end of the workpiece cloth on the cloth feeding side from the seam forming position of a cycle sewing machine, and to move the workpiece cloth in a direction away from the seam forming position along the cloth feeding line. providing a holding means;
A guide body having a guide surface parallel to the cloth feed line is provided on the cloth feed side of the seam forming position, and a brush wheel is further provided that can rotate around a single axis inclined with respect to the cloth feed line. Therefore, if the work cloth holding means is arranged in advance close to the seam forming position, there is no need to adjust the position of the work cloth holding means regardless of the size of the work cloth. In addition, by configuring the work cloth holding means provided on the cloth feeding side of the seam forming position, and the guide body and brush wheel provided on the cloth feeding side, the cloth is fed in while sandwiching the seam forming position. It is cheaper than a sewing device of the type in which a work cloth holding means is provided on both the side and the cloth feeding side.

Moreover, because the brush wheel is rotatable and the brush part itself has flexible characteristics, when the work cloth is transferred by movement of the work cloth holding means, the work cloth is not stretched. It has excellent practical effects.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention in an automatic sewing machine for sewing continuous front holes.
Fig. 1 is a front view, Fig. 2 is a plan view taken along line 2-2 in Fig. 1, Fig. 3 is a cross-sectional view taken along line 3-3 in Fig. 2, and Fig. 4 is a 4-- sectional view in Fig. 3. The 4-line sectional view and FIG. 5 are explanatory views corresponding to FIG. 2. FIGS. 6 and 7 are partial perspective views showing modified examples. 1 is a sewing machine table, 2 is a buttonhole sewing machine body (cycle sewing machine), 3 is an arm, 4 is a bed, 5 is a needle, 10 is a presser foot, 12 is a processed cloth, 1
3 is a support leg, 14 is a guide rail, 15 is a work cloth support stand, 16 is a rack, 17 is a pulse motor, 18
is a pinion, 19 is a mounting plate, 20 is a workpiece cloth holding means, 20a is a pressing piece, 20b is a driving body, 21 is a cloth support plate, 22 is a mounting body, 23 is a guide plate, 23
a is a guide surface, 28 is a guide plate, 28a is a guide surface, 2
9 is a guide piece, 33 is a support shaft, 34 is a brush wheel, 36
is an air jet pipe, 37 is a buttonhole stitch (cycle stitch), 40 is a support base, 42 is a swinging arm,
43 is a tension spring, 44 is an air cylinder, and 45 is a leaf spring.

Claims (1)

[Claims for Utility Model Registration] The needle 5 moves up and down, presses the work cloth 12, and moves the needle 5 in a plane perpendicular to the needle 5.
and a presser foot 10 that is moved relative to the workpiece cloth 1.
Cycle sewing machine 2 that forms cycle stitches on 2
In a sewing device configured to feed one piece of work cloth and continuously form a plurality of cycle stitches spaced apart from each other, the sewing machine is provided with a sewing machine configured to feed a piece of work cloth and continuously form a plurality of cycle stitches spaced apart from each other. a work cloth holding means 20 which is arranged to hold one end of the work cloth 12 and is moved away from the seam forming position along a cloth feed line XX passing through the seam forming position; It is provided on one side of the feed line X-X and on the opposite side of the work cloth holding means 20 across the seam forming position, extends parallel to the feed line, and engages with the side edge of the other end of the work cloth. A guide body 23 having a guide surface 23a that can be mated with the guide body 23 is arranged opposite to the guide surface 23a of the guide body 23, and when the work cloth 12 is transferred by the work cloth holding means 20, the work cloth 12 is a brush wheel 3 rotatably supported around an axis Y-Y inclined with respect to the work cloth feed line in order to direct the side edge of the work cloth toward the guide surface 23a;
4, when the presser foot 10 is raised after the formation of the one cycle stitch is completed and the work cloth 12 is moved together with the work cloth holding means 20 and reaches the next seam forming position. A sewing device characterized in that said presser foot 10 is lowered and cycle sewing is restarted.