JPH0718383Y2 - Cloth stand for traveling sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a cloth pedestal used when sewing cloth with a traveling sewing machine.

[Prior Art] For example, when finishing a woolen fabric, it is common to perform a so-called anti-joining by sewing a large number of pieces of cloth one after another with a sewing machine and perform the processing collectively. In this case, the jointing of fabrics should be done completely along the texture.
Moreover, it is necessary to prevent a step from being formed at the seam, and if this seaming is not performed properly, various defects will occur during the steaming process which is a typical finishing process. That is, if the textures do not match, the fabric is set while being bent, and if there is a hole in the seam, the amount of steam passing becomes uneven, causing uneven setting, and if there is a thick overlap, unevenness occurs on the cloth surface. As described above, since the spliced state of the cloth has a great influence on the quality of the product, it is necessary to sew the cloth with great care.

[Problems to be solved by the invention] For sewing this cloth, two workers are currently working as one group.
The work is performed by cutting the cloth, stacking the cloth edges, setting it on the sewing machine table, and starting the traveling sewing machine.The traveling sewing machine cuts the overlapped edge of the cloth and cuts the cloth edge after cutting. Suture. However, since it is not possible to provide a table for supporting the cloth in the traveling path of the sewing machine, the cloth is not completely supported and it is difficult to maintain a desired suture line. That is, as shown in FIG. 6, since the placing table 51 is provided on the front side (arrow C) as seen from the operator, the cloth is reliably supported, but the back side (arrow) on which the sewing machine travels. In D), since such a stand cannot be provided because it interferes with the running of the sewing machine, the unsewn fabric located on the front side in the traveling direction with respect to the table surface 6 integrally provided on the sewing machine is on the back side. FIG. 7 shows a case in which the running sewing machine cuts the overlapped end of the cloth, and the end after cutting is sewn, as shown in FIG. As described above, there is a problem that the suture line (L) gradually bends by E. Such a fabric having a bend in the suture line causes a quality abnormality such as a texture bend and a gloss step in the subsequent processing step.

[Means for Solving Problems] In order to solve the above problems, the present invention employs the following configuration.

That is, the cloth receiving table for the traveling sewing machine according to the present invention is a cloth receiving table for the traveling sewing machine that performs sewing while moving along a predetermined rail, and moves together with the sewing machine on the front side in the traveling direction of the traveling sewing machine. Upper and lower two-stage rollers are provided, one end of which is supported at a lower position on the starting end side of the traveling route and the other end of which is supported at a higher position on the end side of the traveling route in the traveling route of the sewing machine. It is characterized in that a part is hung on the upper and lower two-stage rollers and bent in a stepwise manner, and the bent part is provided with a belt that moves with the movement of the rollers.

[Operation] Since the belt is stretched at the same level in the traveling route of the sewing machine body (head) from the traveling end portion to the upper roller immediately in front of the sewing machine head, the upper surface of this belt supports the cloth supporting cloth before sewing. It becomes a stand. Even if the sewing machine head moves, the upper and lower rollers move together with the sewing machine head, and the belt is lowered from the upper roller to the lower roller side, so the belt on the side of the sewing machine does not interfere with the running of the sewing machine. Instead, it always maintains the same level and functions as a cloth tray. As a result, good suture can be obtained.

[Embodiment] FIG. 1 and the following figures show an embodiment of the present invention. This cloth pedestal 1 is used by being attached to a traveling sewing machine 2. A cloth tensioning device 50 for tensioning and supporting the cloth is also installed in the room.

The sewing machine 2 is a known automatic traveling end stitch sewing machine (traveling machine, hereinafter simply referred to as “sewing machine”), and a head 7 having a sewing needle 3, a cloth presser plate 5 and a table surface 6 extends along a rail 8 in an arrow X direction. It is designed to reciprocate. Note that, in FIG. 1, a support member that movably supports the head 7 on the rear rail 8 is omitted. 9 in the figure
Is a cutter, and 10 is a control device. The presser plate 5 of the sewing machine is attached to the tip of a lever 13 pivotally attached to the head main body by a shaft 11, and a link 14 is connected to the rear end of the lever. The rear end of the link 14 is connected to a rod 16 of a solenoid type actuator 15, and by energizing the actuator, the pressing plate can be moved up and down to press the cloth.

As shown in FIG. 2, the cloth pedestal 1 is provided from the starting end portion A to the terminating end portion B of the traveling path of the sewing machine 2. Terminal B
Includes a table surface 6 integrally provided with the sewing machine head 7.
An upper roller 20 and a lower roller 21 positioned below the upper roller are provided at substantially the same level as the above. An upper roller 23 is provided at the starting end portion A at a level slightly lower than the bottom surface of the sewing machine head 7, and a lower roller 24 is provided immediately below the upper roller 23. The positions of these rollers 20, 21, 23, 24 are fixed, and in the illustrated example, the lower roller 21 and the lower roller 24 are supported at the same level.

An upper roller 26 and a lower roller 27 supported by the sewing machine head are provided on the front side of the sewing machine head 7 in the traveling direction (side surface facing the end portion B). The upper roller 26 is positioned at the same level as the upper roller 20 on the terminal end side, and the lower roller 27 is positioned at the same level as the upper roller 23 on the start end side. The upper roller 26 and the lower roller 27 are rotatably supported by arms 30 and 31 projecting from the sewing machine head 7.

An annular flexible belt 33 having a predetermined width is stretched around each of the rollers. That is, the belt 33 is horizontally hung from the upper surface of the upper roller 20 on the terminal end side to the upper surface of the upper roller 26, and vertically descends from the rear surface of the upper roller,
It is horizontally hung on the upper surface of the upper roller 23 on the starting end side through the front and lower surfaces of the lower roller 27, and is hung on the lower roller 22 on the starting end side from the rear surface of the upper roller 23 through the rear surface and the lower surface of the lower roller 24. Has been.

Instead of using such an annular belt 33, as shown in FIG. 3, a long belt 33 'may be used in which the terminal end portion B and the starting end portion A are fixed to the upper and lower support bars 35 and 36, respectively. .
In this case, members corresponding to the lower rollers 21 and 24 are unnecessary.

The cloth pedestal 1 is provided between a rail 8 that guides the movement of the sewing machine head 7 and a cloth tensioning device 50 described below so as not to interfere with the movement of the sewing machine head 7.

The cloth tensioning device 50 faces the head 7 of the sewing machine 2 and is installed along the moving stroke of the head. This cloth tensioning device 50 is provided with a pair of left and right pin type grips 52, 53 on the upper surface of a mounting table 51 on which the cloth is mounted. Grasping tools 52,53
Is a large number of pins 54 which are pierced by the cloth on the upper surfaces of the substrates 52a and 53a.
Is projected, and the sewing start side (the standby position side of the head 7)
The gripping tool 52 located at is fixed by a screw 55 so that the left and right positions can be adjusted within a slot 54 formed in the starting end of the mounting table 51. In the figure, 56 is a pin cover that opens and closes in a hinged manner.

On the other hand, the grip 53 on the opposite side has an elongated hole 57 provided on the mounting table 51.
Is fixed to the support rod 58 inserted in the
Is fixed to the chain 59. One of the sprocket wheels 60, 60 ', on which the chain 59 is stretched, has one sprocket wheel 60 attached thereto, and has a sprocket wheel 63 attached with a chain 62 driven by a torque motor 61 attached thereto. The driving force of the torque motor 61 is transmitted to the chain 59. By driving this chain 59, the support rod 58 moves into the long hole 57.
Move along one of the grips 53
Move it in the direction in which the interval of expands and contracts.

The torque motor 61 also serves as an urging unit that urges the movable-side grip 53 in a direction in which the distance between the grips is increased. By adjusting the voltage of the torque motor 61, the force for pulling the cloth can be controlled. The tension applied to the cloth is set by the knob 64 of the control device 10.

As the driving force transmission mechanism of the biasing means, the chain as described above is not used, but a pinion rack mechanism is used as shown in FIG. 5 to change the rotation of the torque motor 61 into a linear motion. Good. In the illustrated example, the torque motor is used as the urging force generation source of the urging means, but the grip 53 may be pulled by an elastic body such as a spring or a rubber cord.

When sewing the end portions of the cloths F that have been overlapped with each other using the sewing machine 2, both ends of the overlapped cloths are held by the grasping tool 5 of the cloth tensioning device 50 with the sewing machine head 7 positioned at the start end portion.
Fix at 2,53. In this case, since the sewing machine head 7 is at the starting point position, the upper surface of the belt 33 serving as a table is in the longest state, and the back end of the cloth to be sewn can be placed thereon. When fixing the cloth F,
Although the cloth is pierced by the pin 54 of the grip, it is preferable that the cloth is attached so that the distance from the pin to the side end (ear end) of the cloth is in the range of 10 to 15 mm.

Check the position of the sewing machine head 7
When is not returned to the starting point position, the sewing machine head 7 is returned to the starting point position by continuing to press the sewing machine backward push button. The sewing machine 2 is provided with a limit switch that detects whether or not the head 7 has returned to the starting point position. If the head 7 has not returned to the starting point position, the sewing machine starts running and sewing even if the operation start push button is pressed. It is supposed not to. When it is confirmed that the head 7 is at the starting point position and the operation start push button is pressed, automatic running and sewing of the sewing machine head 7 are started. The operation at this time is divided into the following steps.
That is, first, the sewing machine head 7 starts to move forward, and at the same time, the upholstery torque motor 61 starts to rotate and urges the grip 53 in a direction in which the distance between the grips increases. T ₄ (0.5sec
After that, the stitching portion of the sewing machine head 7 is driven to start stitching the cloth (step 1). That is, the end of the cloth F on which the sewing machine 2 is superposed is cut by the cutter 9, and the operation of sewing the cut end is started. At this time, since both ends of the stitched portion of the cloth are pulled by the grips 52, 53,
The sutured portion is straightly tensioned, and good suturing is performed.

Moreover, since the cloth on the front side of the traveling path of the sewing machine is supported by the belt 33, it does not hang down as shown in FIG. 8 and a suture line without bending as shown in FIG. 9 is obtained.

Further, as the sewing machine head 7 moves, the upper roller 26 and the lower roller 27 move while feeding the belt 33 downward, so that the upper surface of the belt at the same level as the table surface 6 becomes gradually shorter.

Next, when the sewing machine head 7 moves to the position of the proximity switch at the end of sewing provided near the end position, the movement and sewing operation of the sewing machine head are stopped, and the sewing machine head is stopped for T ₂ (about 1.0 sec) (step 2). . If the proximity switch does not work for some reason, stop by the limit switch provided at the end position.

After stopping between the T _2, the sewing machine head 7 starts to retreat while stopped suturing function (Step 3). At this time,
The belt 33 is lifted up by the upper roller 26 and the lower roller 27, and the upper surface of the belt 33 becomes longer as the head 7 retracts.

When the sewing machine head 7 retreats to the position of the limit switch at the start end, the traveling of the sewing machine head 7 is stopped, and the cloth tensioning torque motor 61 retreats for T ₃ (about 3.0 seconds) to loosen the cloth. The torque motor 61 automatically stops when T ₁ (about 60 seconds) or more has elapsed from the start of operation. The running speed and the sewing speed of the sewing machine head can be synchronized with the knob of the control device.

[Advantage of the Invention] Since the cloth pedestal 1 can place the back end of the cloth to be sewn in the movement path of the sewing machine head,
The cloth before sewing does not hang down on the back side. Moreover, since the upper surface of the sewing machine expands and contracts with the movement of the sewing machine head, it does not hinder the running of the sewing machine head. Therefore, it has become possible to perform the sewing operation of the cloth easily and in a good condition.

It is obvious that the cloth receiving table can be attached to a moving body other than the traveling sewing machine and can be used as an elastic support table on which articles other than the cloth are placed.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of the present invention, FIG. 2 is a perspective view of the main part thereof, FIG. 3 is an explanatory view of a different embodiment,
FIG. 4 is an explanatory view of a cloth tensioning device, FIG. 5 is an explanatory view showing a part of a different example, FIG. 6 is an explanatory view of a conventional device in which a sewing machine head is omitted, and FIG. 8 is an explanatory view of a sutured state, FIG. 8 is an explanatory view of a used state of an embodiment of the present invention, and FIG. 9 is an explanatory view of a sutured state by an apparatus according to the present invention. 1 …… Cloth stand, 2 …… Sewing machine 7 …… Head, 26 …… Upper roller 27 …… Lower roller, 33 …… Belt

Claims (1)

[Scope of utility model registration request] 1. A cloth receiving table for a traveling sewing machine, which is sewn while moving along a predetermined rail, wherein upper and lower two-stage rollers that move together with the sewing machine are provided on the front side of the traveling sewing machine in the traveling direction. In the traveling route of the sewing machine, one end is supported at a lower position on the starting end side of the traveling route, the other end is supported at a higher position on the trailing end side of the traveling route, and an intermediate part is supported by the upper and lower two-stage rollers. A cloth pedestal for a traveling sewing machine, which is provided with a belt that is hung and bent in a stepwise manner, and the bent portion moves along with the movement of the roller.