JPS642708Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an automatic hem machine equipped with a device that runs a long towel cloth and sews one end edge at a time or both ends at the same time, and minimizes the concavity caused by the sewing of the sewing end edges. This invention relates to a sewing device.

Conventional sewing machines that sew the edges of long towel fabrics in which the sewing machine is fixed to a frame use a cross guider or a regulating rod with a regulating collar to control the meandering movement of the long towel fabric during sewing work. It was common for the system to be forcibly corrected. However, since the towel fabric is soft and flexible, sufficient meandering correction is not always possible, and as a result, it has not been possible to completely eliminate the occurrence of depressions at the sewn edges. This tendency is gradually becoming more noticeable as sewing speeds have improved in recent years.

The present invention was developed in view of the above circumstances, and its purpose is to more effectively minimize the meandering of towel fabric using a meandering correction device with a towel feeding function. At the same time, an intermittent tension machine that synchronizes with the operation of the material feed mechanism (feed dog of the sewing machine) of the sewing device and feeds at a speed higher than the feed speed is used to evenly spread the sewing edge from the top and bottom of the towel fabric. To provide an automatic edge sewing device for a long towel fabric with a relatively simple structure and high performance, which more effectively removes depressions in the edge after sewing by pulling in the running direction.

The details of the present invention will be described below with reference to embodiment figures. FIG. 1 is a perspective view of an automatic edge sewing device for a long towel fabric according to the present invention, and FIG. 2 is a perspective view of the same intermittent tensioning machine. As shown in FIG. 1, this embodiment is a sewing device that sews only one edge a of a towel fabric A, and the sewing machine sews only one end edge a of a towel fabric A, and the sewing machine sews only one edge a of a towel fabric A in the running direction of the long towel fabric A that is supplied from a stock box through a tension device T. It is composed of a meandering correction device 100, a sewing machine 200 such as a sewing machine, and an intermittent tensioning machine 300, which are sequentially arranged on the frame body 10. Although not included in the present invention, the folding device F transports and folds the long towel fabric A whose edge a has been sewn.

The meandering correction device 100 includes the following feed device 170.
It consists of a cross guider 110, which is commonly known in the sewing industry. The feed device 170 was rotatably supported on a frame 140 that was installed on the frame body 10 so as to be slidable in a direction perpendicular to the running direction of the towel fabric A. A press roller 133 has a main drive feed roller 121 and a driven feed roller 122, and is rotatably supported on support arms 131, 132 which are rotatable on the pedestal 140 and is brought into contact with the feed rollers 121, 122. , the active feed roller 121 is rotationally driven by a motor 144 attached to a pedestal 140 that pivotally supports the rollers 121, 122 and the support arms 131, 132;
Next, a power transmission means 142 consisting of a chain, a chain wheel, etc.
The driven feed roller 122 is synchronously rotated in the same direction through the feed rollers 121 and 12.
2 and the press roller 133, the towel fabric A is fed between the press roller 133 and the roller 12
The drive device 160 moves in the direction of correcting the meandering under the control of the sensor 150 that detects the meandering of the towel fabric A conveyed by the rotational drive of the towel fabric A 1, 122, 133.
The towel cloth A is moved and driven by the conveyor belt to feed the towel cloth A and correct its meandering. The frame 140 has the tops of the feed rollers 121 and 122 connected to the frame body 1.
Frame body 1 so that it is at the same level as the top surface of 0.
Guide rods 141, 141, which are horizontally suspended and fixed to the upper part of the front surface of 0, are slidably and tightly inserted into the upper part of the front surface, and the following rack rods 162 are fixed to the side part.
The motor 1 is also mounted on the front upper side of the frame body 10 via a driven plate 143 connected to the motor 1.
61, a pinion (inside the motor casing), and a drive device 160 comprising the rack rod 162. The drive device 160 is a sensor 150 of a phototube device consisting of four elements 151, 152, 153, 154 installed on the frame body 10 by a support plate 155 between the feed device 170 and the sewing machine 200. Under control. That is, the central two second and third elements 152, 153
The sensor 150 is positioned in such a way that conveying the towel fabric A to the sewing machine 200 is in the most appropriate state at a position in between, and when the fabric A blocks light from the outer third element 153, the fabric A is moved inward. Similarly, the inner second element 15
A driving device 160 that moves and drives the frame 140 so that when the fabric A releases the fabric A, the fabric A moves outward.
and the innermost first element 15
1 or the outermost fourth element 1
It has a function of making an emergency stop of the entire sewing machine when the fabric A blocks light from the sewing machine 54. This feed device 170 corrects the meandering of the fabric A in advance by adjusting the running resistance on both sides of the fabric A using the so-called cross guider 110 in the previous process, and further reduces the amount of meandering. In order to move the dough A accurately, it is sandwiched between feed rollers 121, 122 and a press roller 133.

A sewing machine 200, which serves as a sewing machine, is driven by a motor 201 and sews the edge a of the fabric A folded into three by three sewing machine needles using a so-called wrapper 210 which folds the edge a of the fabric A into three. sewing machine 200
While the sewing machine needle is rising, the feed dog 221 of the feed mechanism 220 feeds the fabric A.

The intermittent tensioning machine 300, the structure of which is shown in detail in FIG.
The feed dog 2 is attached to the shaft end 230 of the drive shaft that drives the feed dog 21.
A crank disk 31 is fixed to operate the intermittent tensioning machine 300 synchronously while the crank disk 21 is operating.
1, and a ratchet which is rotatably fed in one predetermined direction by a lever 321 which is swingably connected to the mechanism 310 and has a long hole for adjusting the amount of feed of the fabric A per unit time. It is rotatably supported by the mechanism 320 and the main body 301,
A pair of gears 331 and 332 that mesh with each other and the lower roller 3 that transmits the intermittent rotational feed in one direction.
35, upper roller 336 and shaft 333, flexible shaft 33
4, a spring 341, a spring force adjustment knob 342, an upper roller guide 343,
It is composed of a biasing/setting mechanism 340 including an upper roller lifting tool 344. Above upper roller 33
6 and the lower roller 335, the sewing edge a is moved only in the running direction by these rollers 336, 335, and at a speed increased by 20% to 40% from the average running speed of the fabric A by the feed amount adjustment lever 321. The upper and lower rollers 335 and 336, which are adjusted so that the feed is performed per unit time corresponding to
It is intermittently pulled in synchronization with the operation of the

According to the automatic edge sewing device for a long towel fabric constructed in this manner, even when the long towel fabric A is sewn at a faster sewing speed by the meandering correcting device 100 having a feeding function, the amount of meandering during the running of the long towel fabric A is increased. is corrected effectively and appropriately to the minimum, sent to the sewing machine 200 in the most appropriate state, and the edge a is triple-folded and sewn neatly, and the sewn edge Further, a is intermittently pulled by an intermittent tensioner 300 in synchronization with the feed operation of the sewing material feed mechanism 220 of the sewing machine 200, by a larger amount than the feed amount per unit time. The concavity at the edge a after sewing can be removed more effectively.

Although this embodiment describes an automatic edge sewing device that sews edge a on one side at a time, an automatic edge sewing device that sews edge a on both sides at the same time may also use either the cross guider 110 or the feed device 170. It is clear that the automatic edge sewing device provided with the above-mentioned edge sewing device also falls within the scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an automatic edge sewing device for a long towel fabric according to the present invention, and FIG. 2 is a perspective view of the same intermittent tensioning machine. Explanation of symbols, 10...Frame body, 100...
... Meandering correction device, 121 ... Driven feed roller, 122 ... Driven feed roller, 133 ...
Press roller, 140... Frame, 150... Sensor for detecting meandering, 160... Drive device, 17
0...Feed device, 200...Sewing machine, 220
...Sewn material feeding mechanism, 300...Intermittent tension machine,
310... Crank mechanism, 320... Ratchet mechanism, 335, 336... Roller, A... Towel fabric, a... Edge of towel fabric.

Claims (1)

[Scope of utility model registration request] Fold the edge a of the long towel cloth A into three layers,
Next, there is a sewing machine 200 such as a sewing machine that performs sewing, and a meandering correction device 10 as a pre-process equipment of the sewing machine 200.
0, and an intermittent tensioning machine that feeds at a speed higher than the feed speed of the sewing machine 200 through a crank mechanism 310 and a ratchet mechanism 320 that operate in synchronization with the sewing material feed mechanism 220 of the sewing machine 200 as post-process equipment. 300, the meandering correction device 10
0 is a pedestal 14 installed on the frame body 10 so as to be slidable in a direction perpendicular to the running direction of the towel fabric A.
0, a feed device 170 including feed rollers 121, 122 and a press roller 133 arranged in parallel on the pedestal 140, and a feed device 170 disposed between the feed device 170 and the sewing machine 200 to detect meandering of the towel fabric A. a sensor 150 and a sensor 1
a drive device 160 that slides the pedestal 140 under the control of 50 to correct the meandering of the towel fabric A;
The intermittent tensioning machine 300 also includes a crank mechanism 3 interlocked with the sewing material feeding mechanism 220.
10 and a ratchet mechanism 320, a pair of upper and lower rollers 33 are rotated only in the running direction of the towel fabric A and contact the finished sewing edge a from above and below.
5,336. An automatic edge sewing device for a long towel fabric.