JPS62284689A - Cloth presser of automatic sewing maichine - 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] & Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a presser foot device for an automatic sewing machine that can produce seams of a certain shape within a certain area in, for example, an industrial sewing machine.

[Conventional technology]

FIG. 2 is an explanatory diagram showing a cloth presser device of a conventional automatic sewing machine. In the figure, (1) is the sewing machine table surface, (2
) is the drive motor of the sewing machine, (3) is the presser foot, (4) is the air cylinder that moves this presser foot (3) completely up and down, (5
) is the presser foot (31'r); (6) is the X-pulse motor that moves this moving table (5) in the X direction; (7) is the moving table (5). (8) is a sewing machine needle position detector provided in the sewing machine body; (9) is a controller; (IG is a program storage element);

Next ((Explaining the operation. Sewing machine table surface (1)
Insert a cloth between the and presser foot (3), and press the air cylinder (
When the full pressure is introduced to 4), the piston extends, and the force moves the presser foot (3) completely downward, pressing the fabric (not shown).

FIG. 3 is an explanatory diagram illustrating the above-mentioned pressing mechanism. In the figure, (1) is the sewing machine table surface, 3 is the presser foot, (
5) is a movable table, (5a) is a bracket of the movable table fixed on the movable table (5) and provided with an axis q1)2, and the handle is an arm provided at the center of the axis αη. υ is the presser arm installed at the axis α℃, o
3 is a pin connecting the arm... and the factory cylinder (4), (
8) is the amount by which one side of the fabric (not shown) is pushed toward the right when the presser foot (3a) moves like the presser foot (3), that is, the amount of shift, and θ is the amount of displacement A it (8). This is the angle of inclination that is the cause.

Next, this operation will be explained. Does the presser presser move depending on the operation of the air cylinder (4)? When η increases, the presser foot (3)
reaches the position of the presser foot (3a). The lower right end of the presser foot (6a) moves to the left by a deviation amount (8) while contacting the fabric, which causes the fabric to drag and interfere with precise sewing.

The cause of this is the inclination angle (θ) of the presser foot (6a).

This invention is an attempt to eliminate the above-mentioned problems.

[Problem that the invention seeks to solve]

In the conventional presser foot device of an automatic sewing machine as described above, as the presser foot (31, (31L)) moves, its inclination angle () occurs, and the cloth is pulled by the end f of the presser foot (3a). Then there was a problem.

[Means for solving problems]

In the presser foot device for the self-a stitch sewing machine according to the present invention,
An automatic sewing machine that moves a device that presses and clamps the fabric along a preset trajectory to create stitches of a fixed shape. A presser arm is interposed between the bracket and another pin provided on the bracket of the presser foot, and a link that forms a parallelogram with the presser arm is provided to respond to the rotation of the shaft. Then, the presser foot moves.

[Effect]

In this invention, as the air cylinder expands and contracts, force is transmitted to the pin, the arm, the shaft, the presser arm, the pin, the bracket, and the presser foot. Also, since a quadrilateral link is formed by the pins provided on the bracket, the auxiliary arm, and the pins provided on other brackets, the presser foot moves parallel to the sewing machine table surface.

The above-mentioned links are provided in pairs on the left and right sides of the bracket to resist external forces in the lateral direction.

〔Example〕

Figures 1 (a), (b), and (c) are explanatory diagrams showing one embodiment of the present invention, in which (a) is a side view, and (b) is a perspective view of a telescopic arm whose length can be fully adjusted. , (c) is an explanatory diagram of a tar/buckle whose length can be adjusted.

In the figure, (1) to (5) are the same as the conventional example, (5a)
is a bracket installed on the moving platform (5), α is a shaft that is slidably fitted to the bracket (5&), (6), (12a),
(12b) is the presser arm η and the auxiliary arm 4.
3b).

The pin connected to (5m) (to) is the arm (1) and air cylinder (4)? The sliding pin, the handle is the telescopic arm, (23a) and (23b) are the levers, (23d) is the elongated hole in the lever (231L), and the long hole (C230') is passed through this elongated hole (23d) to the lever (23a). ) and lever (2
3b) is a screw for tightening, (c) is an expandable turnbuckle, and (24a), (24b), and (24c) are members of this turnbuckle.

Next, this operation will be explained. When the air cylinder (4) expands and contracts, the parallelogram-shaped link operates and presses the presser foot (3).
) moves up and down. This presser foot (3) is moved parallel to the sewing machine table surface (1) by the effect of the link.

Therefore, the cloth (not shown) is immediately raised horizontally from the state in which it is held, so there is no need to pull the cloth.

Also, since this link is provided facing each other on the left and right through the bracket (5a) (z), it can be easily bent even if an external force is applied to the tip of the presser foot (3) in the X-axis direction (direction perpendicular to the plane of the paper). There is nothing.

In addition, in order to bring the presser foot (3) into contact with the cloth in parallel, one link, that is, the auxiliary arm (2), is attached to a telescopic arm or a turnbuckle (
If used in place of (c), the parallelism t can be adjusted.

〔Effect of the invention〕

As explained above, this invention is configured so that the presser foot is supported via parallelogram-shaped links facing both sides of the bracket that can move in It can be moved up and down while maintaining the same position, so it won't drag the cloth. It also has sufficient rigidity to withstand external forces in the lateral direction. Furthermore, by using a telescoping arm or a turnbuckle, the parallelism of the presser foot can be adjusted at the beginning of work.

[Brief explanation of the drawing]

Fig. 1+al, fbl・(cl is an explanatory view of one embodiment of this invention, (at is a side view thereof, (bl is a perspective view of an auxiliary arm, (C) is an explanatory view of a turnbuckle, Fig. 2 3 is an explanatory diagram showing a conventional presser foot device of an automatic sewing machine, and FIG. 3b) is a bracket, (4) is an air cylinder, (5)
) is the moving table, (5a) is the bracket, α is the shaft, (2)
is a pin. α3 is a bottle, ■ is an arm, (c) is a presser arm, kan is an auxiliary arm, (to) is a telescopic arm, and the example is a turnbuckle. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Patent Attorney Tadashi Sato Figure 1 (a) (b) (c) 1: Sewing machine 〒-7′ @ 12.12a, 12b: H 3: Presser foot 13: Bottle 3b, bracket 20; Arm 4: Air cylinder “21;t〒11 arms outstanding
24: Kunno Iri Ishi Figure 3 d 1: Kunundef J side 11; Output 4
- Engineering 7 cylinder 2Q: Arm procedure amendment (A) April 8, 1986

Claims (2)

[Claims] (1) In an automatic sewing machine that moves a device that presses and clamps the fabric along a preset trajectory to create stitches of a fixed shape, a shaft provided on the bracket of the moving table of this sewing machine and a fabric presser foot are used. A presser arm is interposed between the pin and the bracket, and an auxiliary arm is provided with a link between the bracket and another pin provided on the bracket of the presser foot so as to form a parallelogram with the presser arm, and the shaft is rotated. A presser foot device for an automatic sewing machine, characterized in that the presser foot moves in response to the movement of the presser foot. (2) The cloth presser device for an automatic sewing machine according to claim 1, wherein the length of the presser arm or the auxiliary arm is adjustable.