JPS5925351Y2 - Cycle sewing machine cloth holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a cloth holding device for a cycle sewing machine, and more particularly to an improvement of a cloth holding device that can reliably hold a workpiece having steps.

Conventionally, this type of device was developed in 1986-37 to sew the upper rubber into the U-shaped opening of the upper of athletic shoes.
The technique described in Japanese Patent No. 581 is known.

However, according to this, it is originally intended for pressing flat surfaces with no steps, and although it is effective for objects with small steps, it cannot press the lower part of objects with large steps. There were drawbacks such as fabric shifting and skipped stitches.

For example, the upper part W of men's leather shoes as shown in Fig. 5
1 and each side edge L of the side piece W2 sewn to the lower piece W3 in advance.
1. When L2 is overlapped and the overlapped part is sewn along the side edge L2 of the side piece W2, the tongue piece W3 is inserted between the upper piece W1 and the side piece W2 in the part S shown by the two-dot chain line in the figure. is interposed in a chive-folded state, but in most other parts there is a tongue piece W3
Because there is no interposition and a large step is created between these parts, the conventional cloth holding mechanism described above cannot reliably hold the low parts without tongue pieces, and especially when suturing charcoal materials, it is difficult to hold the needle. In addition to the high penetration resistance, when sewing these shoes, the pressure of the presser foot is not sufficiently applied to other parts because the narrow area of part S is higher than most of the other parts, so There is a drawback that the sewing material tends to rotate and shift easily.

The purpose of this invention is to solve the above-mentioned drawbacks of the conventional method by pressing the periphery of the seam forming area separately using an upper cloth presser divided into 1 part in the seam forming direction.

Examples of this invention will be described below with reference to the drawings.

The cycle sewing machine 1 is started by engaging a clutch (not shown) by a starting operation, and after forming a certain number of stitches, the clutch is automatically disengaged and stopped. This is a known type of needle that is held by a device 2 and moves back and forth and left and right with respect to a needle bar 3 that moves up and down at a fixed position to form stitches along a predetermined planned line.

In FIG. 6, the board 4 is adapted to slide in the left-right direction along the upper surface of the bed]a and rotate around the right end in conjunction with a feeding mechanism (not shown).

The fabric support 5 extends below the sewing machine seam part, and has a hole 6 (Figs. 3 and 4) surrounding the seam forming area in the center thereof, and is fixed to the left end of the board 4 with vertically penetrating holes. A three-cylindrical guide hole whose base end is fixed to the upper surface of the substrate 4 and whose free end is open at least downwardly and whose cross section is rectangular 8. 9.10 are formed vertically, and each guide (L8.9.10 has a leg body 11.
12 and 13 are loosely fitted so that they can move up and down.

The press plate 14 is rotatably supported in the middle by a step screw 15 with respect to the supporting frame 7, and always receives the elastic force of the coil spring 16, and one end is engaged with the notch 11a of the leg body 11. Provides a downward force of 11.

The right end of the rotating plate 17 is bent upward to form a contact portion 17a, and the center portion is rotatably supported on the support frame 7 by a shaft 18.

Then, the upper end of the pressing plate 14 and the left end of the rotating plate 17 are connected by a link 19, and by pushing down the contact portion 17a of the rotating plate 17, the leg body 10 is raised along the guide hole 7. Configure.

Although the leg body 12 is not shown, it is moved up and down along the guide hole 9 in conjunction with the rotation of the rotation plate 17 by a mechanism similar to that described above provided on the opposite side of the support frame 7. There is.

Further, although not shown in detail, the rotary plate 17 is linked to the upper and lower plates 20, which are configured to rise when the starting pedal is depressed and lower when the starting pedal is released. The upper and lower plates 20 are locked in the raised position in response to stepping in the direction, and the clutch of the cycle sewing machine 1 is engaged.

In FIG. 1, the interlocking body 21 is a shaft portion of a stepped screw 24 whose base end is rotatably supported by a stepped screw 22 on the front surface of the support frame 7 and fixed to the leg body 13 through an elongated hole 23 in the vertical direction. The middle long hole (
(not shown) loosely fit.

The actuating body 25 is rotatably supported on the support part 7a of the supporting frame 7 by a step screw 26, and the free end of the interlocking body 21 is loosely fitted into a trifurcated part 25a formed at the free end of an arm extending horizontally forward. At the same time, the free end of the interlocking body 21 is always pressed downward by the elastic force of the coil spring 27.

The cycle sewing machine 1 is provided with a presser foot lifting pedal (not shown) that can be operated independently of the starting pedal, so that the operating body 25 resists the coil spring 27 when the presser foot lifting pedal is depressed. The presser foot lifting pedal and the vertical arm of the operating body 25 are connected by a Bowden wire 28 so that the presser foot can rotate.

The lower cloth presser foot 29 has a flat lower surface facing the upper surface of the cloth support 5, and its front end surface (periphery) 29a is fixed to the leg body 13 along the hole 6 of the cloth support 5 and positioned slightly outside of the hole 6.

A pair of upper pressers 30a and 30b are provided symmetrically as shown in FIG. 1, one of which is fixed to the leg 11 and the other to the leg 12.

One set of upper cloth pressers 30a and 30b are connected to the holes 6 of the cloth support 5 in one stroke.
Holes 31 a, 31 along the edge of and slightly larger than the edge of
b are shaped symmetrically as shown in FIG.

The third edge presser 32 is made of a thin plate with high elasticity and newly bent into an L-shape, and its horizontal base 32a is fixed to the upper surface of the upper fabric presser 30a with a screw 33, and the free end 32b formed in a comb-like shape is fixed to the upper surface of the upper fabric presser 30a with a screw 33. It is arranged downward so as to be adjacent to the front end surface 29a of the lower presser foot 29.

The second edge presser 34 has two stepped screws 35 installed above it, and a step is inserted into a hole 36 bored on the upper fabric presser 30 on the opposite side of the first edge presser 32, sandwiching the hole 31a. The shaft portion of the screw 35 is loosely fitted, and a coil spring (not shown) is compressed and disposed between the upper cloth presser 30a and the second edge presser 34.

The third edge presser 37 is formed into an L-shape, and its horizontal base 37 a
A vertical hole 38 is formed in the holder, and the vertical hole 38 is loosely fitted into the shaft of a shoulder screw 39 which is provided in parallel with the shoulder screw 35 and protrudes upward from the upper presser foot 30a, and the free end 37b is downwardly inserted. At the same time, a coil spring 40 is compressed and placed between the head of the stepped screw 39 and the horizontal base 37a.

Note that the upper cloth presser 30b also includes a first edge presser 32, a second edge presser 34, and a third edge presser 3 similar to the upper cloth presser 30a.
7 are arranged symmetrically as shown in FIG.

This invention has the above-mentioned structure, and its operation will now be explained using an example of shoe sewing.

The lower presser foot 29, that is, the leg body 13 is moved by the actuating body 25, the interlocking body 21. The set of upper presser feet 30a and 30b, ie, the legs 11.12, is always pressed down via the step screw 24, and the upper and lower plates 20 are always locked in the position shown by the solid line in FIG. As a result, it is lifted upward against the coil spring 16 via the rotating plate 17, the link 19, and the pressing plate 17, and the state before operation is the sixth one.
It looks like the picture.

When the presser foot lifting pedal is depressed from this state, the actuating body 25 is rotated in the direction of arrow a through the poaching wire 28 against the coil spring 27, and the interlocking body 21 is rotated in the direction of the arrow. 13 rises, whereby the lower presser foot 29 separates upward from the upper surface of the presser foot 5.

Therefore, after inserting the upper piece W1 between the heavy weight 5 and the lower presser foot 29 and placing it at a predetermined position so that its side edge L1 extends beyond the hole 6 of the heavy weight 5, When the presser foot lifting pedal is released, the deck piece W1 is strongly pressed against the upper surface of the cloth presser foot 29 by the lower surface of the lower cloth presser foot 29.

Next, attach the side edge L2 of the side piece W2 to the front end surface 29 of the lower presser foot 29.
When the starting pedal is pressed one step after being pressed onto the side edge L1 of the upper piece W1, the upper and lower plates 20 rise to the position indicated by the two-dot chain line in FIG. a, the pressing plate 14 rotates together with the rotating plate 17 in the counterclockwise direction in FIG. The presser feet 30a and 30b are also lowered.

Then, when the upper presser feet 30a and 30b descend, the 3.4th
As shown in the figure, the first edge presser 32 is attached to the side edge L of the side piece W2.
The second edge presser 34 and the third edge presser 37 press the side piece W2 downward along the side edge L1 of the upper piece W1, avoiding the seam forming place. Avoid and press downward.

Note that when sewing the left side of the shoe as shown in FIG. 2, the part S shown in FIG. 30b, but the second edge presser 34 is pushed down by the elastic force of the spring so as to lightly press the upper surface of the side piece W2 along the step screw 35.

Therefore, at this time, the only place where the pressing force of the side piece W2 is weak is the part of the upper cloth presser foot 30a that faces the third edge presser 37, and most of the other parts are the upper cloth presser foot 30a, 30b and the first or first edge presser foot 37. It is firmly pressed by the cooperation of the third edge presser 32, 34° 37.

Also, when sewing the right side of the shoe, part S is the upper presser foot 30.
It is the same as described above except that it is located below the third edge presser 37 of b.

As described above, according to this invention, the lower presser foot presses the lower workpiece when the seams are overlapped, and the upper workpiece works together with the overlapping weight to hold the workpiece. In addition, the upper fabric presser is divided into two parts in the direction of seam formation so that each piece of workpiece is pressed separately, so there is no need to create a step in the middle, for example when the number of overlapping sheets is different. It is possible to reliably hold the object to be sewn, and especially when sewing shoes as shown in the embodiment, an excellent effect can be obtained.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the cloth holding device, Fig. 2 is a perspective view similar to Fig. 1 with the upper cloth presser removed, and Fig. 3 is a perspective view of the cloth holding device.
-III cross-sectional view, Figure 4 is IV-I in Figure 1.
5 is a plan view of the object to be sewn, and FIG. 6 is a right side view of the cloth holding device. 1... Cycle sewing machine, 5... Cloth presser foot, 6... Hole, 29... Lower fabric presser foot, 30
a, 30b... Upper fabric presser, 32... Edge presser (first edge presser), 34... Intermediate presser (second edge presser), 37... ...Intermediate presser part (third edge presser)
.

Claims (1)

[Claims for Utility Model Registration] Three pieces of workpieces are sandwiched in a vertically overlapping manner so that their edges are located inside the other workpieces, and in a direction perpendicular to the vertical direction of the needle bar. In the cycle sewing machine 1, the sewing machine moves along the side edge of the upper workpiece and sews the overlapping part thereof. A flat cloth support 5 on which an object can be placed, and a cloth support 5 which is arranged above the cloth support so as to be movable up and down and always has a downward elastic force, and whose lower surface presses the lower object to be sewn against the upper surface of the cloth support.
A lower presser foot 29 has a vertical end face that can contact the side edge of the upper workpiece to position the workpiece, and a lower presser foot 29 is provided adjacent to the end face of the lower presser foot to touch the side edge of the upper workpiece. An edge presser 32 for pressing toward the side edge of the lower workpiece; and a plurality of independent intermediate pressers for pressing the upper workpiece at a distance from the edge presser at the seam forming location. 34 and 37, and a set of upper fabric pressers 30a and 30b that divides the periphery of the seam forming area into 1 part in the seam forming direction and presses each separately; 1. A cloth holding device for a cycle sewing machine, comprising two sets of operating means each of which can be operated separately to lower the cloth.