JPS6377485A - Cloth gripping mechanism of sewing apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an automatic sewing machine, particularly when assembling and sewing a band-shaped bag-sewn product fabric onto a cylindrical sewn product fabric using a sewing machine. This relates to a dough gripping mechanism.

[Conventional technology]

Conventionally, this type of cylindrical assembled sewn product, for example, a belt-shaped waist belt, is assembled to the body of a skirt, etc. When sewing, the fabric of each part is flexible and in an irregular shape, so mechanical handling is difficult. Previously, this type of assembly and suturing was dependent on the manual labor of skilled workers with dexterity, but in order to improve productivity, the inventors of the present invention have developed a temporary ``Sewn product parts support structure'' and ``Automatic assembly and sewing control device'' were invented, and patent applications were filed in 1980, respectively.
-179488 and Japanese Patent Application No. 60-179489.

Detailed explanation will be omitted to avoid duplication with the cited document, but
As shown in FIG. 6, which is an explanatory diagram of the main part of the body support, the body support consists of a central shaft body 26 and a plurality of support pieces 21 arranged radially around the circumference and which can be expanded/reduced in the radial direction. body 1
A skirt body, etc. is supported in a cylindrical shape on top, and the tip of the waist belt of the belt-like bag body is engaged with the leading guide rod 68 from the tangential direction of the circumference of the upper end of the cylinder, so that the skirt body rotates together with the support. It was configured to be assembled and sutured using a stationary sewing machine while being guided around the area.

[Problem that the invention seeks to solve]

However, in the configuration of the proposed example above,
The leading guide rod 38 attempts to draw the belt around it as the skirt body rotates, but provides a mechanism for minimizing the relative positional deviation between the two and correctly grasping the mutual sewing position even after the two join together. It is an object.

[Means for solving problems]

Therefore, in the present invention, on each of the plurality of support pieces that cylindrically support the cylindrical sewn product material, the belt-shaped bag material material that is sequentially fed onto the circumference of the cylindrical end is always kept at a predetermined relative position. This object is achieved by providing a gripping mechanism for gripping the cloth and releasing the grip only during a predetermined period when the two fabrics are assembled and sewn together by a sewing machine.

〔Example〕

The present invention will be explained below based on examples.

FIG. 4 is a broken vertical sectional view of the main part of the embodiment of the body support body according to the present invention, FIG. 5 is a perspective view of the entire sewing device, and FIGS. FIG. 6 shows a developed view in the direction of the arrow X in FIG. 2.

(Configuration) First, in the overall diagram of this sewing device in Fig. 5, M is the present i sewing machine mounted on a support stand α so that the needle moves horizontally.
The support stands a can be moved in the up-down/back-and-forth directions, but they operate stationary at a predetermined position during sewing. S is expansion/mm
A body support that has a small section and rotates around a vertical axis, on which is a cylindrical sewn fabric (in this example, it is a skirt body). 2 is centered and rotates together with the support S. Reference numeral 1 denotes a sewing product fabric 1 which is a belt-shaped bag body (in this embodiment, it is used as a waist belt of a skirt), and is sewn by a sewing machine M along the circumference of the upper end of the rotating skirt body 2 by a guide stand device G. The needle is sent to the needle drop section 13 (FIG. 3). In addition, C is the control panel of this device, and r is each support piece 3 of the body support S (
This is a vacuum pressure source for supplying vacuum to the body fabric suction cup 27 (FIG. 4) on the upper body (FIGS. 1 to 4).

FIG. 4 shows the main part structure of the body support S which is basically the same as that of the conventionally proposed side temperature diagram 6, in which a pair of comb ring bodies 21 slide up and down on the support shaft 20. By moving, the plurality of support pieces 3 arranged radially in an umbrella shape can be expanded/reduced as shown by two-dot chain lines. As shown in FIGS. 1 to 4, an air cylinder (large cylinder 4) is fixed on each support piece 6, and the tip of the piston rod is
It is configured to form a guide rod 6 for the waist belt 1, and to be operated by an air cylinder (referred to as a small cylinder 7) attached under the guide rod 6.゛Dog and small cylinders 4.
7 is performed by controlling the solenoid valve 23 by opening and closing the microswitch 25 using the cylinder switch cam 22 (FIG. 4) which rotates together with the support S.

Further, 24 is a button cam which will be described later.

(Operation) Next, the operation in the above configuration will be explained. In FIGS. 1 to 5, the skirt body 2 is supported from the inside by a plurality of circumferentially arranged support pieces 3 of a support S, and is set in the correct position by the vacuum suction cup 27. On the other hand, the waist belt 1 is waiting in a correct positional relationship on the guide stand device G (FIG. 5), and the waist belt 1 is folded in half and both ends are sewn together to form a bag shape. Further, as shown in FIG. 3, the leading guide rod 11 is waiting at a predetermined position, and when it reaches the lower end of the waist belt 1, it is pulled by the operating guide rod 11 of the solenoid valve 23 and the belt 102 The upper edge of the skirt body 2 is held between the folded portions and advances.

When the cam 22 moves further a predetermined distance, the solenoid valve 26
Air is supplied to the predetermined large cylinder 4 and small cylinder 7 through the guide rod 6, and the clamp 8 rotates to close the belt 1 from the open state shown in FIG. 1 as shown in FIG. is held between the guide rod 6 and the clamp 8.

As the feed due to the rotation of the support body S further progresses, the same operation continues one after another, and the needle drop section 13 of the sewing machine M (Fig. 6)
When you reach near the sewing machine needle and guide rod 6. Clamp 8
To prevent interference between cylinders, remove the air from both cylinders and return to the state shown in Figure 1.

After passing through the needle drop section 13 of the sewing machine, each cylinder is supplied with air and is brought into the state shown in Fig. 2 again to grip the sewn waist belt 1 (ST in Fig. 6 shows the stitches). Return to the state shown in Figure 2 and continue the process. At this time, when the guide rod 6 rises again, the button follower cam 24 (FIG. 4) is installed so that the edge of the sewn belt 1 does not interfere with the tip of the guide rod 6 and push up. roller 24
By temporarily pushing up the support piece through α, consideration is given to allowing the tip of the guide rod 6 to escape slightly inward.

As mentioned above, the waist belt 1 and the skirt body 2 are
Suturing is performed while maintaining proper grip and relative position at virtually all times. Since both the front and rear parts of the sewing machine except for the needle entry part 13 are gripped correctly as described above, the tensile force for advancing the fabric is not applied only to the first work rod 11, as in the conventional proposal example, so that the average The quality of the sewing is improved.

In the present embodiment, the sewn product is a case in which a waist belt is sewn to a skirt body, but the sewing product is not limited to this, and may include a cylindrical fabric and a belt-shaped part, such as pants and a belt, or Of course, it can also be applied to similar sewn products such as sleeves and cuffs.

〔Effect of the invention〕

As described above based on the embodiments, according to the present invention, when assembling and sewing a belt-like bag material to a cylindrical sewing product material, both materials are sewn together except for a predetermined period of time at the needle entry point of the sewing machine. Since the sewing machine is always held in a relatively tight position, the quality of assembly and sewing can be significantly improved.

[Brief explanation of the drawing]

FIGS. 1 and 2 are two operating state diagrams of main parts of an embodiment of the body support according to the present invention, and FIG.
Figure 4 is a vertical cross-sectional view of the main part of the body support, Figure 5 is a perspective view of the entire sewing device, and Figure 6 is a proposed example of a conventional body support. It is a mechanism explanatory diagram. 1... Waist belt (belt-shaped bag sewn product fabric) 2...
・Skirt body (fabric for cylindrical sewing product) 6... Support piece 7... Small cylinder 8... Clamp (gripping mechanism) G... Guide stand M... Sewing machine S... body support

Claims (1)

[Claims] While rotating the cylindrical sewn product fabric supported in a cylindrical shape on a plurality of support pieces, in synchronization with the rotation, the belt-shaped bag sewn product fabric is sequentially fed so as to cover the front and back sides of the cylindrical end. In an automatic sewing device for stitching fabrics with a sewing machine while assembling fabrics, fabric gripping means is provided on each of the support pieces to constantly grasp both fabrics at predetermined relative positions, and the means is held for a predetermined period of time during stitching by the sewing machine. A fabric gripping mechanism for a sewing device, characterized in that the fabric gripping mechanism is configured to release the grip only when the grip is released.