JPH0328871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a fabric edge folding mechanism for folding the fabric of the waist area of pants, skirts, and trousers into three.

[Conventional technology]

Generally, when wrapping annular rubber around the waist of pants or the like and sewing it, wrapping the annular rubber into a tri-fold part looks better than wrapping it into a bi-fold part, and improves the product value.

[Problem that the invention attempts to solve]

However, folding this type of fabric involves manually wrapping the annular rubber, which has the problem of requiring skill and low production efficiency. There was also the problem that the finish was likely to be uneven.

This invention is intended to improve the above-mentioned situation, and aims to provide a fabric edge folding mechanism that can automate the folding of the fabric edge and provide a uniform finish.

[Means for solving problems]

The measures taken to achieve the above objectives are:
A pair of guide members are provided so as to be able to approach and separate from each other, and one guide member has tongues for scooping up the folded portion of the fabric when the pair of guide members approaches each other and pinches the overlapping portion. When the overlapping part of the piece, the folded part, and the annular rubber is fed while being sandwiched between a pair of guide members, a predetermined part of the unfolded fabric on one side of the overlap part is inserted into the folded part. a first guide piece that guides the tongue piece upward to separate it from the tongue piece, a curved part formed in an outwardly bulging shape and a rising shape at the end on the fabric entrance side, continuous with the tongue piece, and opposed to this curved part at a distance. a second guide piece having a diagonally rising portion; and a spatula-shaped piece extending from the lower end of the diagonally rising portion of the second guide piece along the tongue piece at a distance from the tongue piece; The guide member is
It consists of a horizontal U-shaped plate facing one guide member.

[Effect]

The cloth end folding mechanism configured as described above operates as follows.

As the overlapping part of the folded part of the fabric and the annular rubber is sandwiched between the pair of guide members, the folded part of the fabric is scooped up by the tongue piece, and the edge of the fabric is pulled up by the second guide piece. and is lifted upwards. Further, the fabric W is lifted up by the first guide piece and pulled away from the folded portion _W2 . When the fabric W is fed from this state, the edge of the fabric is gradually introduced between the fabric and the annular rubber by the action of the second guide piece, and at the exit, the edge of the fabric is introduced between the annular rubber and the fabric. It is pinched and folded into a complete tri-fold.

〔Example〕

FIG. 1 is a schematic perspective view of an annular rubber sewing device employing a cloth end folding mechanism, which is an embodiment of this invention, in which 1 is a cloth feeding mechanism, 2 is a sewing machine, 3 is a movable frame, and 4 is a rubber sewing device. Reference numeral 5 indicates a mounting mechanism, numeral 5 indicates a fabric end folding mechanism for folding in two, and numeral 6 indicates a fabric edge folding mechanism for folding in three. These will be explained below.

FIG. 2 shows the cloth feeding mechanism 1. The cloth feeding mechanism 1 shown in the figure has an inverted U-shaped guide surface 10 formed on the outer surface of a fixed frame 103 having two legs 101 and 102.
4, a strip 105 is slidably wound around this guide surface 104, and the winding and rewinding mechanisms 106 and 107 of this strip 105 are connected to the two legs 1.
01 and 102, respectively. A winding and rewinding mechanism (hereinafter referred to as
This is called the first winding and rewinding mechanism. ) 106 is equipped with a first reel 108 and a first feed roller 109, and a winding and unwinding mechanism (hereinafter referred to as a second winding and unwinding mechanism) 107 provided on the other leg 102 is equipped with a second reel 110. A second feed roller 111 is provided. One end of the strip 105 is wound around the first reel 108, the other end is wound around the second reel 110, and the two middle parts are wound around the first reel 108 and the second reel. They are wound around the first feed roller 109 and the second feed roller 111 at locations near the feed roller 110, respectively. Both the first reel 108 and the second reel 110 are constantly biased with a predetermined force in the direction of winding the strip 105, and when the strip 105 is fed in, the fed strip 105 is wound up, and when the strip 105 is unwound, it is rotated in the unwinding direction against an urging force. Both the first feed roller 109 and the second feed roller 111 are driven by separate motors 112 and 113, respectively. A stepping motor or a servo motor is used as the motor 112 that drives the first feed roller 109. Motor 11 that drives second feed roller 111
No. 3 uses a type in which rotational torque is applied to the rotational shaft by the frictional force of the rotating part.

As shown in FIGS. 1 and 2, the sewing machine 2 is a multi-needle type, and a sewing section 201 includes a presser foot 202.
The cloth feed mechanism 20
4 has a driving side roller 205 and a driven side roller 206.
is equipped. Such a sewing machine 2 itself is well known.

Here, while the fixed frame 103 is fixedly installed on the base A, the sewing machine 2 can be moved back and forth while being guided by a guide rod 207. And the above strip 10
The position relative to 5 is the operating position, and the position behind it is the standby position.

The movable frame body 3 is installed so as to surround the fixed frame body 103, and the guide rod 301
It is designed to be able to reciprocate outside the fixed frame 1 by being guided by. The movable frame 3 is equipped with a rubber attachment mechanism 4 and a fabric end folding mechanism 5 for folding in two, which will be described later.

The rubber mounting mechanism 4 has a pair of upper and lower pins 401 and 402 attached to the movable frame 3, and these pins 401 and 402 can move toward and away from each other in the vertical direction. Cloth edge folding mechanism 5 for bi-folding
is equipped with a hook portion 501 that clamps the edge of the cloth. As is clear from FIG. 1, the cloth end folding mechanism 5 is attached to four locations on the movable frame 3, each of which corresponds to four locations on the outer surface of the fixed frame 103.

3 to 5 illustrate the cloth end folding mechanism 6. The cloth end folding mechanism 6 shown in the same figure has a slide base 60
A pair of front and rear guide members 602 arranged on 1,
603, an air cylinder 604 for moving these guide members 602 and 603 toward and away from each other, and a link 605, the specific structure of which will be described next.

One guide member 602 is connected to the slide table 60.
A slider 607 fixed to the slide plate 606 is fitted into a long hole 608 formed in the slide base 601 and long in the front-rear direction. The slider 607 is fixed to the piston rod 610 of the air cylinder 604, which is attached to the back surface of the slide table 601 via a fitting 609, via a tip fitting 611 and a connecting rod 612. Reference numeral 613 indicates a set screw for fixing the slider 607 to the connecting rod 612. In addition, the connecting rod 612 extends forward,
The extended portion thereof is inserted through a support member 614 provided on the slide base 601, and a compression coil spring 615 is interposed between the support member 614 and the slider 607. The other guide member 603 is fixed to a slide plate 618 that is slid on the slide plate 606, and a pin 61 provided on this slide plate 618 is fixed to the slide plate 618.
9 is fitted into a long hole 620 formed in the slide base 601 and a long hole 621 formed in the slide plate 606. And the above link 605
The pin 61 is inserted into the long hole 622 opened at one end.
9 is locked. Furthermore, this link 605
A pin 624 provided on the tip fitting 611 is locked into a long hole 623 opened at the other end. 625 is a support shaft that supports the link 605.

Next, as shown in detail in FIG. 5, one guide member 602 includes a first guide piece 631 provided at the end of the fabric outlet side of a guide plate 630 bent in a horizontal U-shape, and A second guide piece 634 constituted by a curved part 632 at the fabric entrance side end of 630 and a diagonally rising part 633 opposite to this curved part, and a spatula-shaped piece protruding from the lower end of the diagonally rising part 633. 635, and the first guide piece 631 is provided with a projecting piece portion 636 that projects into the inside of the guide plate 630. Further, the guide plate 630 is integrally provided with a tongue piece 637. Continuing from this tongue piece 637, the curved part 632 is formed in an outwardly bulging and rising shape at the end on the cloth entrance side. The other guide member 603 is made of a horizontal U-shaped plate facing the one guide member 602.

The cloth feeding mechanism 1 operates as follows.

In FIG. 2, the first winding and rewinding mechanism 106
When the first feed roller 109 is intermittently rotated in the winding direction (arrow The strip 105 that is unwound from the second reel 110 of the return mechanism 107 and sent in the winding direction X by the first feed roller 109 is wound around the first reel 108 by the amount of the feed. At this time, the second feed roller 111 applies torque in the unwinding direction (arrow Y) to the strip 105 and rotates in the winding direction following the strip 105. For this reason, the strip 10
5 is the first reel 1 with a constant tension applied.
08 is intermittently wound up.

Further, the first feed roller 109 is operated by stepping or a servo motor to unwind the strip 104 in the Y direction.
When the strip 105 is continuously rotated, the strip 105 is continuously unwound from the first reel 108. At this time,
The second feed roller 111 also feeds the strip 105 while applying torque in the unwinding direction Y.
Therefore, the strip 105 is fed in the unwinding direction by the cooperation of the first feed roller 109 and the second feed roller 111, and the amount of the feed is wound onto the second reel 110.

The strip 1 is wound by the winding and unwinding mechanisms 106 and 107.
05 is intermittently fed in the winding direction Set to standby position.

Therefore, the sewing machine 2 is set to the operating position, and the fixed frame 103 is covered with the fabric W to maintain its annular shape. Then, as described above, the strip 105 is connected to the fabric feeding mechanism 204 of the sewing machine 2. When synchronized and intermittently fed in the winding direction sent. In this case, since the strip 105 is made of a thin metal plate and does not stretch, the fabric W is reliably sent to the sewing section 201 without being stretched or twisted.

The rubber attachment mechanism 4 operates as follows.

As shown in FIG. 8a, the movable frame 3 is moved forward to cause the pins 401, 402 to protrude in front of the fixed frame 103, and these four pins 401, 402 are brought close to each other. Wrap the annular rubber R around the pins 401 and 402.
When separated, the annular rubber R is stretched as shown in Fig. 8b. When the movable frame 3 is moved backward while the annular rubber R is stretched to a size that fits into the fixed frame 103, the annular rubber R is arranged around the fixed frame 103 as shown in FIG. 8c. . From this state, the fabric W is placed over the fixed frame 103 as described above, and then the movable frame 3 is moved forward to a predetermined position as shown in FIG.
Deploy them around W ₁ . After this, as shown in Fig. 8e, the pins 401 and 402 are brought close together and the annular rubber R
When contracted, the annular rubber R overlaps the cloth edge _W1 ,
The cloth edge W ₁ is pressed against the strip 105 by the force that causes the annular rubber R to shrink further. Therefore, as described above, the strip 105 is wound in the winding direction
(See Figure 2) to ensure that the fabric W is
Sent with 05. After the annular rubber R is placed on the cloth edge _W1 , the movable frame 3 is moved back as shown in FIG. 8f, and the pins 401 and 402 are pulled out from the annular rubber R.

The cloth edge folding mechanism 5 for folding in two operates as follows.

7a to 7g show the process of folding the cloth end _W1 of the cloth W placed on the fixed frame 103 in half. The cloth edge W ₁ is raised from the fixed frame 103 by a spacer 118 provided on the fixed frame 103 . FIG. 7a shows a state in which the direction of the hook portion 501 is adjusted so that it faces the fixed frame 103. When the hook part 501 is moved forward from this state, the hook part 501 springs against the spring 50 as shown in FIG. 7b.
It comes into elastic contact with the fixed frame 103 with a force of 2. Next, the seventh
Move the movable frame 103 forward to insert the hook portion 501 below the cloth edge W ₁ as shown in FIG.
1 to hold the cloth edge W ₁ . Next, when the movable frame 103 is further moved forward, the cloth end _W1 is folded back to the outside of the annular rubber R as shown in FIG. 7e.
Next, as shown in Fig. 7f, the hook part 501 is moved forward to come into elastic contact with the folded part _W2 , and from this state, the movable frame 103 is further moved forward until it is locked on the hook part 501 as shown in Fig. 7g. Completely fold back the edge W ₁ of the fabric. At this time, the cloth edge _W1 is made to protrude slightly beyond the annular rubber R. As described above, the cloth edge _W1 is folded in half. Note that after the two-folding is completed, the hook portion 501 returns to its original state (for example, the first
the state shown in the figure).

The folding in half described above is performed at four locations around the fixed frame 103, but the folding may also leave an unfolded portion at the cloth edge _W1 .
Such unfolding can be completely eliminated by applying an air jet.

The cloth end folding mechanism 6 for tri-folding operates as follows.

This cloth edge folding mechanism 6 is provided in front of the sewing section ₂₀₁ of the sewing machine 2 as shown in FIG. will be sent. and,
The cloth end folding mechanism 6 folds the cloth end _W1 into three and sends it to the sewing section 201.

At the stage when the cloth edge W ₁ is folded in half, the pair of guide members 602 and 603 are separated as shown in Fig. 6a, and after the folding in half is completed, these guide members 602 and 603 are separated as shown in Fig. 6b. be approached. The pair of guide members 602 and 603 are moved toward and away from each other by the action of an air cylinder 604.
When the guide members 602 and 603 approach, the overlapping part of the folded part _W2 of the fabric W on the slide No. 601 and the annular rubber R is scooped up by the tongue piece 637 as shown in FIG. 6b, and is removed from the annular rubber R. The protruding cloth edge W ₁ is the second guide piece 634
It is raised upward by. In addition, a predetermined portion of the fabric W hanging down in front of the slide table 601 that is not folded back, that is, a folded portion W ₂
A predetermined portion on one side of the overlapping portion of the annular rubber R that is not folded back is lifted up by the first guide piece 631 and pulled away upward from the folded portion _W2 . When the fabric W is intermittently fed by the fabric feeding mechanism 1 from this state, the edge W ₁ of the fabric is gradually moved between the fabric W and the annular rubber R by the action of the guide plate 630 or the second guide piece 634. At the exit of the guide plate 630, the cloth end _W1 is sandwiched between the annular rubber R and the cloth W, and is completely folded into three. The trifold portion thus formed is sent to the sewing section 201 of the sewing machine 2 and subjected to rubber shearing. FIG. 9 is a cross-sectional view of the annular rubber R sewn into the trifold portion. In the same figure,
N indicates a seam location.

Each of the mechanisms detailed above is controlled by, for example, a computer and operates according to its program.
An example of this will be explained.

A rubber attachment process is performed by the rubber attachment mechanism 4 to the place where the fabric W is held in an annular shape by the fixed frame 103. Next, a two-folding process is performed by the fabric edge folding mechanism 5, and after this, the fabric edge folding mechanism 6 is set in front of the sewing section 201 of the sewing machine 2. Then, the cloth feeding process by the cloth feeding mechanism 1 and the cloth end folding mechanism 6
The tri-folding process by the sewing machine 2 and the sewing process by the sewing machine 2 are performed simultaneously. Note that the sewing by the sewing machine 2 is performed after the cloth feeding mechanism 1 preliminarily feeds the trifold portion of the cloth W by a predetermined width. This is to ensure a trifold state. Further, just before the trifold point of the fabric W is rotated once by the fabric feeding mechanism 1, the guide member 60 of the fabric end folding mechanism 6
2 and 603 are separated so that the starting end of the sewing location does not become a hindrance when passing between the guide members 602 and 603.

[Effect of idea]

According to this idea, the tri-folding process, which was previously done by hand, is automated, and workability is greatly improved compared to the past, which not only improves productivity but also reduces the number of manual processes. This has the advantage of making the finish more uniform.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of an annular rubber sewing device employing a fabric end folding mechanism according to an embodiment of this invention, Fig. 2 is a partially cutaway front view of the fabric feeding mechanism, and Fig. 3 is an implementation example. FIG. 4 is a plan view showing the links of the mechanism, FIG. 5 is a schematic perspective view showing the main parts of the mechanism, and FIGS. 6a and 6b are three views of the cloth edge folding mechanism. Figures 7a to 7g are illustrations of the folding process, Figures 8a to 8f are illustrations of the rubber attachment process, and Figure 9 is an illustration of the process of folding the fabric edge in half. FIG. 2...Sewing machine, 6...Fabric end folding mechanism, 103
... Fixed frame body, 201 ... Sewing section of sewing machine, 63
1...First guide piece, 634...Second guide piece,
W...Fabric, _W2 ...Folded portion, R...Annular rubber.

Claims (1)

[Scope of Claim for Utility Model Registration] The outer side of the fabric W that is provided in front of the sewing section 201 of the sewing machine 2 installed inside the fixed frame 103 that maintains the fabric W in an annular shape and that is annularly maintained. A fabric end folding mechanism of a circular rubber sewing device which sews a circular rubber R fitted into a fabric together with a folded part W ₂ folded back to the outside of the fabric W to the fabric, wherein It is equipped with guide members 602 and 603, and one guide member 602 is a tongue piece for scooping up the folded part _W2 of the fabric W when the pair of guide members 602 and 603 approach each other and sandwich the overlapping part. 637, when the overlapped part of the folded part _W2 and the annular rubber R is fed while being sandwiched between a pair of guide members, a predetermined part of the fabric that is not folded on one side of the overlapped part is A first guide piece 631 that guides upward to separate from the folded part W ₂ , a curved part 632 formed in an outwardly bulging shape and a rising shape at the fabric entrance side end continuous with the tongue piece 637 , and this curved part 632 , a second guide piece 634 having a diagonal rising portion 633 opposed to the second guide piece 632 with a space therebetween;
From the lower end of the diagonally rising portion 633 of No.
37 and a spatula-shaped piece 635 extending along the guide member 602 at intervals, and the other guide member 603 is made of a horizontally U-shaped plate facing the one guide member 602. A fabric end folding mechanism of a circular rubber sewing device characterized by: