JPH0344554B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a protective cloth, so-called shoelace, which is provided on the rear inner periphery of the hem of trousers to prevent the trousers' fabric from rubbing against the road surface or the rear of the shoe. The present invention relates to a sewing method for sewing a prevention cloth (sewn cloth) onto pants (sewn cloth) using a sewing machine.

[Summary of the Invention] As shown in FIGS. 1a and 1b, a shoe is provided on the inner peripheral surface of the rear side of the hem of the pants to prevent the pants body fabric S from rubbing against the road surface or the rear side of the shoes. Anti-slip cloth C
need to be sewn.

In order to particularly prevent slippage prevention cloth C from rubbing against the road surface, as shown in Fig. 1a and b, a protrusion C ₁ is formed near the center of the fabric C to protrude about 1 mm from the hem end. need to be formed.

Conventional shoe-slip prevention cloth C is made by folding a piece of cloth in half and oversewing the edges so that the free end does not open, forming it into a straight strip, as shown in Fig. 1c. When sewing the cloth to the body fabric, the worker manually deforms the anti-slip cloth C so that both longitudinal ends are bent and the center part protrudes as shown in FIG. 1a. this is,
Before sewing the anti-slip cloth C to the pants body fabric,
Since it takes considerable effort to change the shape shown in Figure 1C to the completed sewing shape shown in Figure 1A in advance, it is generally a straight strip of cloth as shown in Figure 1C. This piece of cloth was modified as shown in Figures 1a and 1b and sewn onto the hem of trousers.

This sewing work is done on the central protrusion of the anti-slip fabric.
C ₁ is only 1 mm wide, and both ends are not straight, but are slightly curved upwards when sewing. This requires advanced sewing techniques, which not only does not improve sewing efficiency, but also reduces the quality of the product. The current situation is that variations occur in the sewing process, creating a bottleneck in the sewing process.

In this invention, a straight band-shaped anti-slip cloth (Fig. 1C) is held in a predetermined position on pants by holding it in a presser foot (Fig. 1D) having a through hole formed in the same shape as the finished sewing diagram. In this way, the above-mentioned conventional problems are solved by sewing the presser mechanism holding the pants and the anti-slip cloth while moving in the horizontal direction in accordance with a predetermined control signal.

That is, by the operation of the drive device, the needle of the sewing machine moves relatively on the planned needle drop line on the inner peripheral edge of the anti-slip cloth, and sewing is automatically performed.

[Embodiments of the invention] Examples will be described based on the drawings.

FIGS. 2 to 6 are diagrams showing one embodiment of the present invention.

FIG. 2 is an external perspective view, in which numeral 1 denotes a sewing machine head, and numeral 2 denotes a drive device that moves the workpiece horizontally relative to the needle and automatically forms stitches of a predetermined shape.

Reference numeral 3 denotes an intermediate presser foot having a penetrating portion 3a having an inner peripheral edge in the shape of the deformed sewing cloth when sewing of the anti-slip cloth C (sewing cloth) is completed, and 4 denotes a penetrating portion similar to the intermediate presser foot 3. An intermediate presser plate having a hole 4a into which the anti-slip cloth C is pushed; 5 is a lower plate on which the pants body fabric (sewn fabric) is placed; While having a similar through hole portion 5a,
It is connected to a drive device 2.

Reference numeral 6 denotes a hinge for rotatably attaching the intermediate presser plate 4 to the lower plate 5.

Reference numerals 2a and 2b are connection parts for attaching the intermediate presser foot 3 to an effect device (not shown) in the drive device 2.
FIG. 3 is a perspective view showing the related structure of the presser mechanism composed of the intermediate presser foot 3, the intermediate presser plate 4, and the lower plate 5.

Placed on the sewing machine table and one end (right side in the figure)
The lower plate 5, which is connected to the drive device 2, has the through hole portion 5a as described above.

The intermediate presser plate 4 is supported by a hinge 6 so as to be able to move toward and away from the lower plate 5, and its through hole 4a overlaps the through hole 5a of the lower plate 5 when joined.

The intermediate presser foot 3 supported by a lowering device (not shown) at the connecting portions 2a and 2b is located above the intermediate presser plate 4, and when it is lowered and joined to the intermediate presser plate 4, its through hole portion 3a is inserted into the intermediate presser foot 3. It is designed to overlap with the through hole portion 4a of the holding plate 4. Reference numeral 3b denotes a presser foot formed on the inner peripheral edge of the through-hole portion 3a, and its lower end protrudes outside the through-hole portion 3a (downward in the figure) when the intermediate presser foot 3 and the intermediate presser plate 4 are joined. , as will be described later, is adapted to press the anti-slip cloth in the penetrating rear portion 4a of the intermediate presser plate 4.

Figure 4 is a side view of the presser foot mechanism, showing the intermediate presser foot 3.
is at the top dead center position along with the needle N, and the intermediate presser plate 4
is in a state of being joined to the lower plate 5. 4b in the figure
4c is the buried position of the magnet 4b on the bottom surface of the intermediate press plate; 4c is the buried position of the magnet 4b on the lower surface of the intermediate press plate; This is a magnet buried in the opposite end. magnet 4b
When the intermediate presser foot 3 rises from the bottom dead center, that is, from the state where it is connected to the intermediate presser plate 4, which is connected to the lower plate 5, it attracts the end of the intermediate presser plate 4 as shown in FIG. The intermediate presser plate 4 is rotated apart from the lower plate 5.

Next, with reference to FIGS. 5 and 6, the operation of this embodiment will be described in conjunction with a description of the sewing process of the anti-slip cloth and the pants material.

In FIG. 5a, the intermediate presser foot 3 and the needle N are at the top dead center, and the left end of the intermediate presser plate 4 is attracted to the left end of the intermediate presser foot 3 by the action of the magnet 4b and raised. In this state, lower plate 5
At a predetermined position, that is, on the through-hole portion 5a of the lower plate 5, the anti-slip cloth C is attached so that the pants body material S to be sewn overlaps.

In the figure, the pants body fabric S is shown as a flat plate for ease of understanding, but in reality, the cylindrical pants body fabric S is worn so as to cover the lower plate 5.

Next, the intermediate presser plate 4 is pulled down against the adsorption action of the magnet, and the pants material C is sandwiched between the intermediate presser plate 4 and the lower plate 5. At this time, the fourth
A magnet 4c shown in the figure acts to firmly fix the pants body fabric C between the two.

Then, a rectangular shoe slip prevention cloth C is pushed into the penetration resisting portion 4a of the intermediate presser plate 4. (FIG. 5b) Next, as shown in FIG. 5c, the intermediate presser foot 3 is lowered and joined to the intermediate presser plate 4. At this time, the lower end of the presser part 3b provided at the inner peripheral edge of the through-hole part 3a of the intermediate presser foot 3 is fitted into the through-hole part 4a of the intermediate presser plate 4, and the shoe slip prevention cloth C is attached to the pants body fabric S. Fixed against.

In this way, when the anti-shoe cloth C and the pants body material C are set in the presser mechanism, the needle N is started, and the presser mechanism is moved horizontally by the drive device 2, which operates according to a predetermined program. Items to be sewn (cloth for preventing slipping of shoes and fabric for pants)
A predetermined stitch is formed by relatively moving the upper part.

When the intermediate presser foot 3 is raised when sewing is completed, the end portion of the intermediate presser plate 4 is also raised. In this state, the cylindrical pants body fabric C (see FIG. 6) to which the anti-slip cloth C is sewn is pulled out from the lower plate 5. (FIG. 5d) FIG. 6 is a perspective view showing a cylindrical trousers body material S having a shoe-slip prevention cloth C sewn in a predetermined position. From this state, fold the end inward like an arrow,
As shown in FIG. 1b, the shoe-slip prevention cloth C is sewn into the hem of the trousers so that its lower end protrudes downward by about 1 mm, thereby completing the sewing of the shoe-slip prevention cloth.

By the way, in the above embodiment, the pair of connecting parts 2
Both a and 2b support the intermediate presser foot 3, but one may support the intermediate presser foot 3 and the other may support the intermediate presser plate 4. That is, the intermediate presser foot 3 and the intermediate presser plate 4 may be independently movable up and down, and may be driven appropriately as the work progresses. According to this, the lowering of the intermediate presser plate 4 after the pants body fabric S is attached to the lower plate 5 can be automated.

[Effects of the Invention] With the above-described configuration and operation, the present invention has the effect that the anti-slip cloth can be automatically sewn to the hem of pants, and the quality of sewing and sewing efficiency are greatly improved.

[Brief explanation of drawings]

Figure 1 shows how the anti-slip cloth is sewn to the hem of the trousers, in which a is a plan view, b is a perspective view, c is a plan view of the anti-slip cloth, and d is a plan view of the anti-slip fabric. A plan view of the intermediate presser plate, FIG. 2 is an external perspective view of this sewing machine, FIG. 3 is an external perspective view showing the related structure of the intermediate presser foot, intermediate presser plate, and lower plate, and FIG. 4 is a side view of the same. FIG. 5 is an explanatory view showing the process of sewing the anti-slip cloth according to the present invention, and FIG. 6 is an external perspective view showing the trousers and the anti-slip cloth that have been sewn by the process shown in FIG. 5. 2... Drive device, 3... Intermediate presser foot, 3a... Through hole section, 3b... Presser section, 4... Intermediate presser plate, 4a
...Through hole portion, 5...Lower plate, 5a...Through hole portion.

Claims (1)

[Scope of Claims] 1. Sewing cloth formed in a shape different from that when sewing is completed is inserted into a through-hole portion formed in a presser foot of a sewing machine and having an inner peripheral edge that follows the deformed shape of the sewing cloth when sewing is completed. The sewn fabric in the through-hole is overlapped and fixed at a predetermined position on the hem of the trousers, and the sewn fabric and the hem of the trousers are sewn along the planned needle drop line at the inner peripheral edge of the through-hole. How to sew cloth.