JPH05184756A - Superimposed sewing system of texture - Google Patents

Abstract

PURPOSE:To automatically and securely proceed a series of processes sewing the knee pad cloth with the front part of trousers after these are placed at a certain position without use of any consumables such as a both-side adhesive tape. CONSTITUTION:The rear end side part of the knee pad cloth 1 set at a texture base 3 is sucked from an suction opening 31 to suspend it downward. This knee pad cloth 1 is positioned by cloth pressers 72, 74 against the texture base 3. After the front side 2 of trousers is superimposed on the knee pad cloth 1 and placed on the texture base 3, only the front side part is fed to a sewing machine 4 to sew the edges. When the front side part slides over the knee pad cloth 1 and reaches an appropriate positional relation with the knee pad cloth, a needle 93 is stuck on both materials to define the mutual positions. The needle 93 is kept in the stuck condition until the needle is pulled by the front side part 2 and the knee cloth is fed to the sewing machine 4. When the knee pad cloth 1 is fed into the machine 4, the needle 93 is pulled out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lapped stitching system for fabrics which is adopted when sewing knee pads to the front body of pants.

[0002]

2. Description of the Related Art In the process of sewing trousers, it is said that the process of attaching a knee pad cloth as a lining to a front body as an outer material using an overlock sewing machine is extremely difficult. That is, conventionally, in this process, the knee pad cloth is positioned at a fixed position on the front body and then temporarily fixed by high frequency welding, or temporarily fixed by using a consumable item such as double-sided adhesive tape, glue, or thread. After that, the overlock sewing machine was oversewn and sewn together.

[0003]

However, in such a conventional process, a high-level technique specialized in positioning the front body and the knee pad before or after temporarily fixing them. Not only requires skill and time, but also the problem that the work takes time or double-sided adhesive tape
There is a problem in that consumable items such as staples, glue, and threads are required, and since these consumable items are originally foreign substances for clothing, they cause price increases.

Further, when the above-mentioned conventional process is adopted, there is a restriction that the sewing machine must be started from the upper part to the lower part of the front body, and due to this restriction, the front body part of one body is overlocked by the overlock sewing machine. Since the final process is the over-stitching, the operator has to hold his hand until the end, which requires time. Further, due to such a problem and the relationship between the shape of the front body and the shape of the front body, there is a problem that it becomes difficult to organize and arrange the sewn products in the stacker.

The present invention has been made in view of the above problems and circumstances, and positions a first cloth such as a knee pad cloth of pants and a second cloth such as a front body at a fixed position without using consumables. An object of the present invention is to provide a lapped stitching system for fabrics, which automatically performs a series of processes of sewing both fabrics after sewing.

[0006]

According to the cloth sewn system of the present invention, the first cloth is laid on the cloth table of the sewing machine in which the slit-shaped suction port communicating with the suction chamber is opened, while crossing the suction port. After the placement, the suction chamber is sucked to hang down a predetermined length portion including the rear end edge of the first cloth under the suction port, hold a predetermined portion of the first cloth, and hold the first cloth. Positioning on the cloth stand, stacking the second cloth on the first cloth and placing it on the cloth table, continuously sewing the second cloth to the sewing portion of the sewing machine while sewing the edge of the second cloth. Sending in, detecting the position of the second cloth with respect to the first cloth on the cloth table, releasing the positioning state of the first cloth with respect to the cloth table at a predetermined timing, and overlapping the first cloth and the second cloth. Positioning both fabrics with each other by inserting a needle into the While the needle is pierced and positioned, the overlapping part of both materials is continuously fed into the sewing part of the sewing machine, and after the second material is fed into the sewing part of the sewing machine, the needle is removed from both materials and the positioning state is released. This is done in this order.

[0007]

According to the present invention, in the first stage, the first
Even if the second cloth layered on the cloth is fed into the sewing section of the sewing machine and the selvage edges are continuously sewn, the first cloth is positioned on the cloth base, so the first cloth is sent together with the second cloth. It will not be done. Further, since the predetermined length portion including the rear end edge of the first cloth hangs downward from the suction port of the cloth table, even if the second cloth is rubbed against the first cloth when being fed into the sewing portion of the sewing machine, The rear edge of the first fabric is not pulled up by being pulled by the second fabric. Then, when the edge of the second fabric is sewn to a predetermined position and the position of the second fabric with respect to the first fabric at that time is detected, the positioning state of the first fabric is released at a predetermined timing, and at the same time, Both materials are positioned with respect to each other by the needle. Therefore, the first cloth is fed into the sewing portion of the sewing machine together with the second cloth, and the sewing of both cloths is started. When the second fabric is fed into the sewing portion of the sewing machine, the needles are removed from both fabrics and the positioning state is released, so that both fabrics are sewn while being positioned.

[0008]

1 to 4 are explanatory views of a lapped stitching system for cloth according to an embodiment of the present invention. In this embodiment, a knee pad cloth 1 for pants is a first cloth and a front body 2 is a second cloth. A case where the inner ear edges 11 and 21 of both 1 and 2 are sewn with an overlock sewing machine will be described. FIG. 5 is a schematic vertical sectional side view of the sewing machine used in this system.

The sewing device A shown in FIG.
And an overlock sewing machine (hereinafter referred to as a sewing machine) 4. A suction chamber 5 connected to a suction blower 51 is provided below the dough table 3, and a slit-shaped suction port 31 formed in the dough table 3 communicates with this suction chamber 5. The interval between the sewing portion 41 of the sewing machine 4 and the suction port 31 is shorter than the length of the knee pad cloth 1, and the width of the suction port 31 is slightly longer than the width of the knee pad cloth 1. Further, a cloth presser 72 pushed and pulled by the cylinder 71 is provided above the cloth table 3 in the front side portion of the sewing machine 4, and a cloth presser 74 pushed and pulled by the cylinder 73 is provided in the suction chamber 5. There is. Further, a detection means 8 for detecting the position of the rear end edge of the front body 2 is provided behind the suction port 31. In the illustrated example, this detection means 8
Is composed of a light emitter / receiver 81 and a reflector 82 provided on the base 3. On the other hand, on the front side of the sewing portion 41 of the sewing machine 4, a slit 32 that is long in the cloth feeding direction of the cloth table 3 is formed. Further, below the slit 32, there is provided a needle insertion means 9 which can be tilted by a constant angle in the front-rear direction X with respect to the cloth feeding direction. The needle inserting means 9 is a cylinder 9 which is swingably supported by a horizontal shaft 91.
2 and a needle 93 that is pushed and pulled by the cylinder 92.

In order to carry out the lap stitching system of the present invention using the sewing apparatus A as described above, first, as shown in FIG. 1, the knee pad 1 is placed on the cloth base 3 in a state of traversing the suction port 31. Place. Then, the suction blower 51 sucks the suction chamber 31, and the suction force causes a predetermined length portion including the rear end of the knee pad 1 to hang down below the suction port 31, that is, inside the suction chamber 5. In this case, the front edge 14 of the knee pad 1 is arranged near the sewing portion 41 of the sewing machine 4. The knee pad cloth 1 set on the cloth base 3 in this manner is shown by a chain line in FIG.

Next, the cylinders 71 and 73 are pushed out,
As shown in FIGS. 2 and 5 (one-dot chain line), the front end portion of the knee pad 1 is placed on the cloth base 3 by the presser foot 72, and the knee pad 1 is placed by the foot presser 74.
The knee pad cloth 1 is held by pressing the respective hanging portions of the knee pad cloth against the wall surface 52 of the suction chamber 5, and the knee pad cloth 1 is positioned at an appropriate position of the cloth base 1. If the needles are projected on the pressing surfaces of the cloth pressers 72 and 74 or the pressing surfaces are made uneven, there is an advantage that the knee pad cloth 1 can be held more reliably.

After that, the front body 2 is placed on the cloth base 3 while being stacked on the knee pad 1. Specifically, the front end portion of the front body 2 is located on the front side of the sewing portion 41 of the sewing machine 4, and the reflection plate 82 of the detection means 8 is covered with the front body 2 and the front body 2 The inner ear edge 21 is arranged along the inner ear edge 11 of the knee pad 1.

After stacking the front body 2 on the knee pad 1 in this manner, the front end portion of the front body 2 is fed into the sewing portion 41 of the sewing machine 4 while the sewing machine 4 is being operated, and the inner ear edge 21 of the front body 2 is rear end portion. Overlock stitching toward. At this time, the front body 2 is fed into the sewing portion 41 of the sewing machine 4 continuously by the action of the feed dog and the presser foot included in the sewing machine 4. When the front body 2 is fed into the sewing portion 41 of the sewing machine 4 in this manner, the rear edge 23 of the front body 2 moves forward while rubbing the cloth base 3, and the inner edge 21 is sewn by a certain length. At that time, the trailing edge 23 is disengaged from the detecting means 8 as shown in FIG. 3, and this is detected by the detecting means 8. The detection timing by the detection means 8 at this time is set so that the overedging of the inner ear edge 21 is before the knee pad 1 and the front body 2 are in the proper overlapping position. Then, after the detecting means 8 detects the rear edge 23 of the front body 2,
The fixed time is counted by the timer, and the overedging of only the inner ear edge 21 of the front body 2 is continued until the time set by the timer has elapsed. During this period, the front body 2 is rubbed and fed over the knee pad cloth 1, but since the knee pad cloth 1 is fixed by the cloth pressers 72 and 74, it does not move, and the knee pad cloth 2 has its rear end portion Since the fixed length portion including it is hanging, the knee pad cloth 1 is not pulled up by being pulled by the front body 2.

When the time set by the timer has been consumed, the cylinders 71 and 73 are retracted and the work clamp 7 is pressed.
The positioning state of the knee pad cloth 1 by 2, 74 is released. At the same time, as shown in FIG. 5, the cylinder 92 of the puncture means 9 which is set in the backward tilting posture is pushed out, and the needle 93 is pierced into the overlapping portion between the knee pad 1 and the front body 2, and this puncture needle is used. The knee pad 1 and the front body 2 are mutually positioned at proper positions. Therefore, when the front body 2 is fed into the sewing portion 41 of the sewing machine 4, the knee pad 1 is also fed into the sewing portion 41 together with the front body 2, and the inner ear edges 1 of both are
1 and 21 are sewn. At this time, the needle inserting means 9 follows the forward movement of the knee pad 1 and the front body 2 and follows the horizontal axis 91.
After tilting forward by a certain angle around the, and the overlock stitching of the knee pad 1 is started, the knee pad 1 and the front body 2 are naturally pulled out from them when they move forward. Thereafter, the knee pad cloth 1 and the inner ear edges 11 and 21 of the front body 2 are fed into the sewing portion 41 of the sewing machine 4 as indicated by the arrow Y in FIG.

From the start of operation of the sewing machine 4 described above to the front body 2
The series of steps until the end of the overlapped stitching of the knee pad cloth 1 with the knee pad cloth 1 is continuously performed without interruption.

In the above, the position of the front body 2 with respect to the knee pad 1 at the time when the set time of the timer is consumed is set to an appropriate sewing position for both. Therefore, when it is desired to change the length from the front edge of the front body 2 to the front edge 14 of the knee pad 1, the timer setting time may be changed,
It is effective to move the detection means 8 back and forth to change the detection timing of the rear end edge 23 of the front body 2, and by doing so, the knee pad 1 having different lengths can be obtained.
And it becomes possible to sew on the front body 2.

As a means for positioning the knee pad cloth 1 on the cloth base 3, a means other than the cloth pressers 72, 74, for example, a clamp means may be used. Further, the detecting means 8 may be other means. Further, the needle stick means 9 may be configured to move horizontally following the knee pad cloth 1 and the front body 2.

By the way, the front edge of the front body 2 is first sewn, then the inner ear edge 21 is sewn together with the inner ear edge 11 of the knee cloth 1, and then the front boring portion 2 is formed.
4 is sewn together with the corresponding portion of the knee pad fabric 1,
Further, the outer ear edge 22 is sewn together with the outer ear edge 12 of the knee pad cloth 1. That is, according to the present invention, since it is possible to perform continuous sewing while automatically feeding the knee pad cloth 1 in the sewing direction from the lower part to the upper part, the above procedure is established. is there. Then, when the overedging is performed by such a procedure, the final seam of the body always ends at the outer edge or the inner ear edge, so that the final seam can be sewn in the released state. As a result, the operator can shift to the next work at the final seam, and the work time can be shortened. At the same time, this also has the advantage that the sewn products can be organized and aligned on the stacker.
When the necessary parts of the front body 2 and the knee pad 1 are sewn in this way, 500 to 550 pieces can be sewn in a time required for 8 hours. Considering that it was only 250 pieces, it can be said that this proves a significant improvement in work efficiency.

In this embodiment, the case where the front body 2 of the trousers and the knee pad 1 are overlapped and sewn is explained, but in the present invention, two kinds of fabrics of other kinds are overlapped and sewn with the positions of the edges thereof shifted. The same can be applied to the case. Further, the present invention can be applied not only to overlock sewing with an overlock sewing machine, but also to overlapping sewing with a sewing machine other than an overlock sewing machine.

[0020]

According to the present invention, when the first cloth is positioned on the cloth table, the second cloth is placed thereon and the sewing of the edge of the second cloth is started, the Since the positioning of the 2nd cloth and the 1st cloth and the sewing of both cloths are performed automatically in sequence, it is not necessary to have a high level of specialized skill and skill in positioning both cloths. Is completely unnecessary. Further, when the positioning of the first cloth and the second cloth is performed by piercing the both cloths, and furthermore, the first cloth and the second cloth are fed into the sewing portion of the sewing machine and the positions of both cloths are not displaced. Since the needle is pulled out by the method described above, it is possible to sew both fabrics in a state in which they are reliably positioned without using consumable items such as double-sided adhesive tape.

Further, for example, when the front body of the pants and the knee pad are sewn with an overlock sewing machine, the present invention automatically feeds the knee pad in the direction from the lower part of the front body to the upper part. However, not only is it possible to continuously sew, but the final seam of the body ends at the outer or inner ear edges, so the final seam can be released and the work efficiency is improved. At the same time, there is an advantage that it becomes easy to organize and arrange the sewn products in the stacker.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which a knee pad is set in the system according to the embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which a knee pad is positioned on a cloth base in the system.

FIG. 3 is an explanatory diagram showing a state in which the position of the second cloth with respect to the first cloth on the cloth table is detected by the detecting means in the system.

FIG. 4 is an explanatory view showing a state in which the overlock stitching of the knee pad cloth is started in the system.

FIG. 5 is a schematic vertical sectional side view of a sewing device used in the system.

[Explanation of symbols]

 1 Knee pad cloth (1st cloth) 2 Front body (2nd cloth) 3 Fabric table 4 Sewing machine 5 Suction chamber 8 Detection means 9 Needle means 31 Suction port 41 Sewing part of sewing machine 72,74 Cloth presser 93 Needle

Claims (1)

[Claims] 1. The first fabric is placed on a fabric stand of a sewing machine having a slit-shaped suction port that communicates with the suction chamber, the first fabric being placed across the suction port, and then the suction chamber is sucked to suck the suction fabric. Hanging a predetermined length portion including the rear edge of the first cloth below the mouth, holding a predetermined portion of the first cloth and positioning the first cloth on the cloth table, and setting the second cloth to the first cloth. Placing it on the cloth stand, stacking it on the cloth stand, feeding the second cloth continuously into the sewing section of the sewing machine while sewing the edge of the second cloth, and the second cloth to the first cloth on the cloth stand. Detecting the position of the dough, releasing the positioning state of the first dough with respect to the dough base at a predetermined timing, and piercing the overlapping portion of the first dough and the second dough to mutually position the dough, While puncturing both fabrics and positioning, do not touch the overlapping parts of both fabrics. Of the second material is continuously fed to the sewing portion of the sewing machine, and after the second material is fed to the sewing portion of the sewing machine, the needles are removed from both the materials to release the positioning state. Sewing system.