JPS5824151B2 - suturing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for forming seams along each edge of a cut piece, such as a cut piece of clothing, which is cut so that its lines meet at an angle. The present invention relates to a suturing device, and in particular to a suturing device that enables seam formation along each line by rotating the cut piece so that when one edge is sutured, the next edge coincides with the feed direction line. .

Conventionally, this type of suturing device was disclosed in U.S. Patent No. 34.
According to this device, which is known from Japanese Patent No. 25369, a rotating means disposed on a sewing machine arm descends from a raised position to engage the upper surface of a cut piece at the same time as sewing of one edge of the cut piece is completed. At the same time, the cut piece is rotated around the vertical axis passing through the sewing point and continued (the other edge is aligned with the feed direction line, so the rotating means rotates toward the operator). As a result, there is a risk that the rotating means will hit the worker's face or hand, causing unexpected serious injury to the worker, and the structure of the rotating means will become complicated, increasing the cost of the product. It had the disadvantage of being inferior in safety and economy.

The object of the present invention is to obtain the above-mentioned suturing device that does not have these drawbacks.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

The sewing machine 1 shown in Fig. 1 is an overlock sewing machine exclusively for overlock stitching, and the arm part 1a has a needle bar 3 that is linked to the driving shaft (not shown) of the sewing machine and supports the needle 2 at the lower end, and a rear end for feeding. A cloth presser foot 5 is installed which is rotatably supported by a horizontal support shaft 4 perpendicular to the direction line and can be moved up and down. Although not shown, there is a looper mechanism that cooperates with the needle 2 to form an overcast stitch, and a looper mechanism that protrudes from and retracts from both feed holes of the needle plate 7 disposed on the cloth support surface 6a and cooperates with the presser foot 5. A feeding mechanism is installed to feed the piece W to be sewn in a predetermined direction (direction of arrow A in FIG. 4), and furthermore, a thread cutting knife 8 is installed behind the presser foot 5 parallel to the feeding direction line. It is installed so that it can rotate around an axis.

An auxiliary stand 9 is arranged around the sewing machine bed 6 and forms a horizontal cloth support surface together with the cloth support surface 6a.
As shown in FIG.
0b, and on the lower surface of the auxiliary stand 9, as shown in FIG. Support in a direction almost perpendicular to

One support shaft 12 rotatably supports a roller 13 with a pulley 13a formed thereon, and the other support shaft 12 rotatably supports a roller 14 having an outer diameter corresponding to the roller 13. An endless belt 15 made of a material with high frictional resistance such as rubber is hung so that a part of its outer circumferential surface passes through the cutout hole 10a and slightly projects from the upper surface of the auxiliary stand 9.

An electric motor M1 is disposed at an appropriate position below the auxiliary stand 9, and a pulley 16 is fixed to the motor shaft, and an endless belt 17 is passed between the pulley 13a of the roller 13 and interlocked therewith.

Further, a roller mechanism (not shown) having the same configuration as above is installed on the lower surface of the auxiliary table 9 near the notch hole 10b, and a part of the outer circumferential surface of the endless belt 18 that is passed through the roller mechanism is also inserted into the notch hole. It slightly protrudes from the upper surface of the auxiliary stand 9 through 10b.

In this case, the roller mechanism is also interlocked with the electric motor M1 by a suitable coupling means such as an endless belt.

As shown in FIG. 1, a branch 19 is fixedly arranged on the left side surface of the sewing machine arm 1a so as to protrude horizontally to the left. The plunger 20a is fixedly arranged vertically so as to protrude and retract up and down toward the surface of the support base, and the tip of the plunger 20a is formed in a shape corresponding to an arc centered on the suture point P, and is exposed on the upper surface of the auxiliary base 9. An engagement plate 21 having a length extending between the endless belts 5 and 18 and having a smooth lower surface is fixedly arranged horizontally so as to vertically oppose the endless belts 15 and 18.

In addition, a pilot lamp 22 that emits light toward the cloth support surface 6a of the bed section 6 is arranged at an appropriate position on the sewing machine frame slightly in front of the presser foot 5, and a pilot lamp 22 that emits light toward the cloth support surface 6a of the bed section 6 is arranged at a suitable position on the sewing machine frame. Two sensors X and Y consisting of phototransistors etc. are placed at 6a.

Although not shown, the presser foot 5 is always rotated clockwise around the spindle 4 so as to be in pressure contact with the upper surface of the throat plate 7 (see FIG. 1).
An elastic acting force is applied thereto, and the thread cutting knife 8 is rotated counterclockwise against the elastic acting force by the operation of an electromagnet connected to the thread cutting knife 8. It is resiliently maintained at a position upwardly away from the support surface 6a, and is joined to the cloth support surface 6a by the operation of an electromagnet connected thereto.

The present invention has the above-mentioned structure, and its operation will now be explained with reference to the electrical control block circuit diagram shown in FIG.

In the figure, the mode designation is, for example, a means for inputting in advance which edges of a piece W to be sewn consisting of four edges are to be sewn.

First, one edge E1 of the piece to be sewn W is aligned with the feed direction line A, and its tip is inserted between the throat plate 7 and the presser foot 5 which has been raised from the upper surface of the throat plate 7 by the action of an electromagnet. Then, the irradiation from the pilot lamp 22 to the sensors X and Y is cut off.

By cutting off the irradiation to the sensor The piece to be sewn W by the eye forming mechanism and feeding mechanism.
A stitch is formed on the edge E1 while being fed in a predetermined direction (direction A).

As shown in FIG. 4A, the sensor X is located at the rear end of the piece W to be sewn.

Passing over Y, the pilot lamp 22 detects the sensor
, Y, the sewing machine and the drive motor M2 are stopped, the sewing machine 1 stops, the stitch formation on the edge E1 is completed, and the presser foot electromagnet is activated to move the presser foot 5 to the sewing machine. One W rises from above.

Furthermore, the air cylinder 20 is opened and closed by the solenoid valve.
The plunger 20a is lowered, and the engagement plate 21 is attached to the piece W to be sewn.
The piece W to be sewn is held between the outer circumferential surface of the endless belt 15 which is engaged upwardly and the auxiliary stand 9 is exposed, and the drive motor M1 is driven.

Driven by this electric motor M1, the roller 13 is rotated clockwise (FIG. 3) via the endless belt 17, and thereby the endless belt 15 is also rotated clockwise (FIG. 3), so that the notch of the auxiliary stand 9 is rotated. The exposed portion from 10a moves in the direction of the dashed arrow in FIG. 4A, and the endless belt 18 also rotates so that its exposed portion similarly moves in the direction of the dashed arrow.

By the rotation of the endless bells 15 and 18, the piece W to be sewn held between the engagement plate 21 is sequentially rotated counterclockwise in Fig. 4 around the sewing point P (see Fig. 4A). (double-dashed line).

Then, as shown in FIG. 4B, the sutured edge E1
When the next edge E2 following the line coincides with the cloth feed direction line, the irradiation to the sensors
At the same time, the plunger 20a of the presser foot 5 is raised, the electric motor M1 is stopped, and the rotation of the endless bell 15. At the same time, the first drive motor M2 of the sewing machine is driven again to form a stitch on the edge E2.

By repeating such actions, each line of the piece to be sewn W is sewn in sequence, and in this case, when the number of edges to be sewn inputted by the above mode specification is sewn, that is, the number of edges corresponding to the above number is sewn from the sensor The rear ends of several pieces W to be sewn are detected.

The thread cutting electromagnet is activated and the stitching thread extending from the suture point P to the rear end of the piece to be sewn W is cut, but the cylinder solenoid valve and the electric motor M1 are not activated again and the scheduled operation is completed. Once the last edge has been sewn, the control circuit will be reset.

As described above, the present invention uses a piece to be sewn having a plurality of edges that touch each other at an angle, for example, by using an overlock stitch or a sewing machine, etc., and when the stitching of one edge is completed, the stitching is carried out above the fabric support surface. A retaining means arranged so as to be movable up and down toward the sewing material descends and engages with the upper surface of the piece to be sewn. By cooperating with the holding means lowered on the frame, the fabric can be actuated on the lower surface of the fabric so that the fabric rotates along the fabric support surface around the stitching point or a point close to it. The engaging means only moves up and down on the support surface, and does not rotate toward the worker (therefore, the engaging means may hit the worker's face or hand, causing unexpected serious injury to the worker. In addition, in the case where the retaining means rotates with the piece to be sewn after engaging with the frame to be sewn, as in the past, the retaining means However, according to the present invention, as shown in the implementation column, the fabric support surface By providing a rotating means such as a belt, the configuration is simplified, which reduces the cost of the product, reduces the chance of failure, and makes it easy to repair even if a failure occurs. There are other effects.

In the above-mentioned embodiment, the rotating means is constituted by an endless belt, but as shown in FIG. Arranged so that it is slightly exposed from the auxiliary stand 9,
These rollers 23 may be driven by an electric motor to rotate the piece W to be sewn.

In this case, if these rollers 23 are arranged along an arcuate trajectory centered on a point y slightly ahead of the sewing point P, the edge to be sewn next will be stretched and aligned with the feed direction line. , it is possible to prevent the piece to be sewn from being sutured in a wrinkled state.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire suturing device, Fig. 2 is a top view of the sewing machine bed, Fig. 3 is an enlarged cross-sectional view taken along line m-m' in Fig. 2, and Fig. 4 is the turning action of the piece to be sewn. FIG. 5 is an electrical control block circuit diagram, and FIG. 6 is a top view of the sewing machine bed section showing another embodiment. Sewing machine...1, engaging means...21, turning means...15, 18, control means...
The block circuit of FIG.

Claims (1)

[Claims] 1. A feeding mechanism for feeding a piece to be sewn, which has a plurality of edges that touch each other at an angle, along a fabric support surface so that one edge moves along a predetermined direction, and a stitch is sewn along the edge. a sewing machine having a seam forming mechanism for forming a seam;
A holding means is installed above the cloth support surface so as to be movable up and down toward the cloth support surface, and engages the upper surface of the piece to be sewn when the holding means is lowered; The rotating means is capable of acting on the lower surface of the piece to be sewn so that the piece to be sewn turns along the fabric support surface around the stitching point or a point close to the stitching point in cooperation with the engaging means lowered onto the piece to be sewn. When the stitching of one edge of the piece to be sewn is completed in conjunction with the engaging means and the turning means, the holding means is lowered from the raised position and the turning means is turned until the other edge coincides with the cloth feeding direction line. A suturing device comprising a control means for rotating a suture piece.