JPS63279888A - Apparatus for supplying cylindrical cloth to sewing machine - Google Patents

Abstract

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

Description

Detailed Description of the Invention 3-1 Purpose of the Invention 3-1-1 Industrial Application Field The invention related to this patent application (hereinafter abbreviated as the claimed invention)
A cylindrical fabric support (so-called free arm) that is made of fabric sewn in advance into a cylindrical shape and protrudes from the sewing mechanism of the overlock sewing machine horizontally and perpendicularly to the fabric feed direction.
A cloth support is located in front of the canvas support in the cloth feeding direction and moves toward and away from the free arm and locks it; a cloth support is located below the canvas support and can move up and down, left and right, and lock;
This invention relates to a technique for enclosing the cylindrical fabric and, in particular, automatically feeding and supplying the cylindrical fabric to the sewing machine seam section for each of the Western army's fabric supports.

3-1-2 Conventional technology Conventionally, in the free arm of an overlock sewing machine, in which a cylinder cloth is surrounded and fed and overlocked, the inner diameter of the cylinder cloth is small, so the surrounding and seaming portion is If the sleeve fabric has a large inner diameter, such as around the waist of a garment, and only the free arm is surrounded, the hanging portion of the sleeve cloth will be large and the hanging portion will be too large due to flexibility and excessive weight. vibrates, making stable feed stitching impossible. Therefore, as in the invention for which the patent applicant of the present invention previously applied for utility model registration, the free arm and three other fabric supports parallel to it and separated from each other are used. It is necessary to surround the body, but since the sleeve fabric is flexible, it is extremely difficult to surround it evenly with the four supports and feed it accurately to the suture area.

3-1-3 Problems to be Solved by the Invention In order to solve the deficiencies of the prior art described above, the present invention provides a method for surrounding four cloth supports and feeding the tube cloth to the seam portion. The purpose is to provide a device that achieves

3-2 Structure of the Invention 3-2-1 Means for Solving the Problems The present invention attempts to solve the problems by expanding the tube cloth with an air flow in order to surround it with a cloth support. It is.

3-2-1-1 Structure of the Invention An embodiment of the present invention will be described below with reference to the drawings.

As shown in Fig. 2, there is an upper left support 1 that is fixed as a so-called free arm that protrudes forward from the sewing mechanism in an overlock sewing machine horizontally orthogonal to the cloth feed direction to support the cloth, and a lower left support in the cloth feed direction. , a lower cloth support 2 is supported in front of the upper left support 1 and parallel to the upper left support 1 so as to be movable and lockable to the machine frame so as to approach and separate from the upper left support 1; The upper left support 3 is located vertically below the body 1 and is parallel to it and protrudes toward the front so that it can be moved up and down and locked, and is located vertically below and parallel to the upper right support 2. In addition, a lower fabric support 4 is provided which protrudes toward the front and is supported so as to be movable up and down and left and right and lockable so as to come into contact with and separate from the upper left support 3.

As shown in Figures 1 and 2, slightly below and inside the lower left and right supports 3 and 4, there are left and right grips 5 and 6 for gripping cloth that protrude toward the front in parallel to the machine frame 7, respectively. Supports back and forth movement.

The left and right grips 5, 6 are attached to a base 8, especially as shown in FIG.
A main body 10 is provided which moves laterally in FIG. 1 (moves back and forth in FIG. 2) by a cylinder 9 connected to the left end of the machine frame 7 and fixed to the machine frame 7 and operated by the inflow and outflow of fluid.

A cylinder 11 that moves linearly as fluid enters and exits is vertically fixed to the inside of the main body 1O, and a guide body that loosely fits into a square hole 12 formed vertically is provided on the opposite side of the cylinder 9. 13 is placed in the vertical movement loe function.

A piston shaft 15 of the cylinder 11 is fixed to the lower horizontal arm 14 of the guide body 13, and a bottle 16 is fixed in the middle in the upper direction.
is fixed so as to protrude toward the front and loosely fit into the vertical hole 17 drilled in the main body, and a push plate 18 that protrudes toward the pressure (projects toward the front in Figure 2) is provided on the opposite side of the arm 14 and is fixed with a free end. do.

5 - On the opposite side of the cylinder 110 of the main body 10, a receiving plate 19 is provided with a free end and is fixed, parallel to the pushing plate 18 and protruding to the left (towards the front in FIG. 2), so as to face the pushing plate 18. Optical sensor 2 exposed in groove 20 opened on the upper surface of receiving plate 19
1 is loosely fitted into the inner hole 22 and supported so that it can be moved left and right in FIG. 1 and front and back in FIG. 2, and can be locked.

As shown in FIG. 2, the upper left support 1 (free arm) has its left I! Fix the optical sensor 22 on the 11th surface,
With the position in the front and rear direction, the tube cloth W7al-each support body 1
~ Surround the outside of 4 and move from the front to the top left support 1
When the sleeve cloth W is fed to the sewing mechanism, it is detected that the front end edge of the sleeve cloth W matches the sewing mechanism, and the cloth is connected to the sewing mechanism.

As shown in FIG. 2, on the left and right outer sides of each of the supports 1 to 4,
The patent applicant for the claimed invention or the patent application filed earlier in JP-A-61-
As shown in Publication No. 122888, cloth pressing plates 23 to 23 are used as part of a device for expanding and contracting the sleeve cloth W surrounding these supports and folding the front end edge of the sleeve cloth W back and forth into an S-shape.
26 are arranged closely together.

As shown in FIGS. 2 and 3, each of the supports 2 to 4 has
A capillary tube 27 is installed which is fixed to the inside in the left-right direction, is arranged vertically, and has a free end facing outward in the left-right direction, and a blower (not shown) is connected to the base end of the capillary tube 27 to supply pressurized air to the capillary tube 2.
7 to the outside in the left, right, top, and bottom of each support 2 to 4.

An electrical control circuit is provided that is related to each of the above-mentioned constituent elements as described below. In other words, when the optical sensor 21 detects that the front edge of the sleeve cloth W has moved to the right in FIG. In conjunction with this, the push plate 18 is moved down via the arm 14 and the guide body 13 at the point 1 that contacts the receiving plate 19 to pinch the tube cloth W, and then the cylinder 9 is actuated to move the left and right grips 5, 6 to the right in FIG. 1 (rear in FIG. 2, right in FIG. 3), and the front edge of the sleeve cloth W was detected by the optical sensor 22 of the upper left support 1. With cylinder 9 inactive (left,
The right grips 5 and 6 are stopped, and when the cylinder 90 is activated, the blower is simultaneously activated to supply pressurized air to the thin tube 27, and when the cylinder 9 is not activated, the air blower is simultaneously deactivated to stop the pressure, and then Then, the cylinder 11 is operated in the opposite direction, and the push plate 18 is raised accordingly, and after the stitching operation of the sewing machine, the cylinder 9 is operated in the opposite direction, and the left 9-stone gripper 5.6 is brought to the first pressure (the first pressure). Move one figure to the front and return.

3-2-2 Effects of the Invention Since the present invention has the above-described structure, it sequentially produces the following effects.

υ When the lower part of the tube cloth W is inserted into the gap between the push plate 18 and the receiving plate 19 of the left and right grips 5 and 6 from the first pressure to the right (from the front to the front in FIG. 2), the optical sensor 21 is inserted into the tube. The front edge of the cloth W is detected and the cylinder 11 is actuated, and the lowering of the piston shaft 15 causes the push plate 18 to lower through the lowering of the arm 14 and the guide body 13, thereby moving the cylinder cloth W in cooperation with the receiving plate 19. and pinch to secure. (Left position chain line in Figure 3) 2) The cylinder 9 acts to move its piston shaft to the first position on the right (Figure 3).
2g2 forward in the figure), move the lower part of the sleeve cloth W in the same direction, and manually move the upper part of the sleeve cloth W in the same direction in synchronization with the downward movement.

3) At the same time as the cylinder 90 acts, the blower starts driving,
By blowing out the pressurized air from each thin tube 27 toward the outside of the left, right, top, and bottom of each support 2 to 4, the inner circumferential surface of the tube cloth W can be rotated outward (inflated and each cloth of each support 1 to 4 Push plate 23-2
It is stretched by 1 on the outside of 6 and passes through.

4) When the front edge of the tube cloth W reaches the position of the optical sensor 22 of the upper left support 1, the cylinder 9 becomes inactive and the left and right grips 5 and 6 stop in connection with the detection in step 7. , the blower stops, the pressurized air also stops, the cylinder cloth W contracts, and the cylinder 11
has the opposite effect, causing the push plate 18 to rise and release the sleeve cloth W from its grip.

(31st right position) 5) In order to drive the sewing machine and rotate the entire tube cloth W in the counterclockwise direction in FIG. 2 so as to overlock the front end edge of the tube cloth W, Feed it downward, rotate the tube cloth W once, and stop the sewing machine when the sewing is finished.

6) When the sewing machine is stopped, the cylinder 9 is reversely operated to move the left and right grips 5 and 6 to the first pressure (third pressure position, second pressure position).
Move to the front of the figure and return.

3-3 Effects of the Invention Since the present invention has the above-mentioned configuration and operates, it has the following effects: a) Even if the inner diameter of the sleeve cloth W is extremely large, and the sleeve cloth is extremely Even if it is highly flexible,
The outer periphery of the valley supports 1 to 4 can be automatically surrounded and reliably fed to the suture section.

b) [Due to the action of the pressurized air blown out from the pipe 27,
Since the tube cloth W expands outward from its circumferential surface, the front end of the tube cloth W is not stopped when being fed into the valley supports 1 to 4, and passes smoothly on the outside thereof. can be fed into the suture area.

[Brief explanation of drawings]

Fig. 1 is a right side view of the left and right grips 5 and 6 as seen from a direction parallel to the cloth feeding direction of the sewing machine, Fig. 2 is a front view of the whole as seen from the front horizontally orthogonal to the fabric feeding direction, and Fig. 3 The figure is a right perspective view of a portion.

Claims (1)

[Scope of Claims] An upper left support 1 having a sewing machine stitching part and protruding toward the front horizontally orthogonally to the cloth feeding direction, and disposed parallel to the upper left support and protruding toward the front in the cloth feeding direction. upper right support 2, lower left and right supports 3 and 4 that are arranged parallel to each other and protrude below each of the upper left and right supports; The thin tubes 27 are arranged close to each other in parallel to the inside and lower part of the lower left and right supports, and the tube cloth W
a left and right gripper 5 whose one end edge can be gripped and released, and which can move horizontally back and forth so as to be able to approach and separate from the suture section of the sewing machine;
6. A tube fabric supply device for a sewing machine, comprising: