JPH0138518B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has attachment members such as a sewing product feeding member and a cutting member on the back side of a sewing machine head,
The present invention relates to a sewing machine for successively sewing band-shaped hem cloths such as collar cloths or hem cloths to a plurality of sewn products.

[Conventional technology]

To attach a band-shaped collar cloth or other hem cloth to multiple sewn products, such as a yukata, cut the band-shaped collar cloth or other hem cloth into a single piece of a predetermined length in advance and attach it to each sewn product. Previously, each piece was sewn one by one, but according to this method, when attaching hem cloth such as collar cloth to multiple unfinished sewn products, the process involves cutting the band-shaped hem cloth to a predetermined length. This method requires two steps: 1. and a step of applying, positioning, and sewing the cut edge cloth to the sewn product.

Therefore, we have eliminated the bottleneck in the production process of having to go through two processes as described above when sewing hem fabrics to multiple sewn products, and we have developed a method to sew hem fabrics continuously to multiple sewn products. In addition, in order to be able to cut the hem fabric for each product to be sewn, the sewing machine is equipped with attachment members such as a hem fabric feeding member, hem fabric cutting member, hem fabric pressing member, etc. on the back of the sewing machine head. The inventor has developed.

Sewing machine heads are generally designed so that they can be tilted backwards for internal inspection and repairs. However, because of the attachment members such as the hem fabric feeding member, hem fabric cutting member, and hem fabric holding member located on the back of the sewing machine head, when the lower part of the sewing machine head is to be inspected and maintained, the sewing machine head cannot be moved rearward. Even if you try to knock it down, you can't because of the attachment member.

[Problem that the invention seeks to solve]

Therefore, even if the present invention is a sewing machine in which attachment members such as a hem cloth feed member and a hem cloth presser member are provided on the back side of the sewing machine head, the sewing machine head can be tilted backwards without being obstructed by these attachment members. The purpose is to do so.

[Means for solving problems]

A fixed board is provided on the back member of the sewing machine head supported on a support member so that it can be tilted back, a swing board is hinged to the fixed board so that it can pivot upward, and a swing board is hinged to the swing board so that it can swing upward. An attachment member is provided. As a result, by swinging the swinging board upward and swinging it to stand upright on the fixed board, the attachment member is lifted up by the back surface of the sewing machine head, a space is created at the back surface of the sewing machine head, and the sewing machine head can be tilted to the back surface. I did it like that.

[Effect]

The swing board hinged to the fixed board on the back of the sewing machine head is in a hanging state during normal sewing, and attachments such as the hem fabric feed member, hem fabric cutting member, hem fabric presser member, etc. provided on the swing board are attached. The members are located on the table at the back of the sewing machine head, but when the sewing machine head is to be tilted to the back, the swinging board is rotated upward and the sewing board is placed upright on the fixed board, so that each of the members is placed above the back of the sewing machine head. can be located. This operation creates a space on the back of the sewing machine head, allowing the sewing machine head to be tilted to the back. By fixing the swinging board that has been pivoted upward to the fixed board using a locking member during the swinging motion, the swinging board will not swing even if the sewing machine head is tilted back.

〔Example〕

Reference numeral 1 designates a sewing machine head, on the back of which a fixed base plate 3 is fixedly supported by a support 2. A swinging board 6 is supported on the fixed board 3 by hinges 4 and 5 so as to be swingable about a hinge axis 7 so as to be in close contact with the board 3 in a normal state.

The swing base plate 6 is provided with attachment members 80 such as a hem cloth feeding member 8 such as a collar cloth, a hem cloth cutting member 9, a hem cloth pressing member 10, and the like.

The hem cloth feeding member 8 is constructed as follows.

A horizontal bar 11 is supported on the swing base plate 6. horizontal bar 1
1, a roll lifting shaft bracket 13 is supported by an arm 12. Roll lifting shaft bracket 13
The roll lifting shaft 14, which is slidably supported by the roller, is urged downward by a spring 15 (FIG. 1)
A press roll 17 is rotatably supported on a roll shaft 16 provided in a cantilever manner at the lower end thereof. On both sides of the pressure roll 17, there are swing arms 19 that transmit rotation to the pressure roll 17 via one-way clutches 18 that transmit rotation of the pressure roll 17 only in the sewing product feeding direction (clockwise direction in FIG. 1). , and a swing arm 21 that transmits rotation to the pressure roll 17 via a one-way clutch 20 that transmits rotation only in the same direction as the one-way clutch 18. Swinging arm 19
is connected to a piston rod 24 of a fluid cylinder 23 supported by the horizontal bar 11 via a connecting rod 22, and swings when the fluid cylinder 23 is operated. The swinging arm 21 connects to the swinging arm 26 via a connecting rod 25.
It is continuous. The swinging arm 26 is fixed to the end of a repetitive rotation shaft 28 supported by a bearing 27 on the swinging base plate 6 . At the opposite end of the coaxial 28 is a swinging arm 29.
is fixed, and a cam arm 32 and butterfly screw 3 that fit into an eccentric cam 31 integrated with a drive shaft 30 of the sewing machine head 1.
It is connected by 3.

A roll elevating shaft elevating member 35 is provided at the top of the roll elevating shaft 14 . The roll elevating shaft elevating member 35 consists of a lever for elevating and lowering the roll elevating shaft 14. Reference numeral 36 denotes a column fixed to the swing base plate 6, which supports a lever 37 pivoted to the top of the roll lifting shaft 14 by a shaft 38, and supports a lever operating arm 39 by a shaft 40. A roller 41 is provided at the tip of the lever operating arm 39, and is pulled by a spring 42 so that the lever operating arm 39 turns counterclockwise in FIG. 43
is a stopper.

The hem cloth cutting member 9 is constructed as follows.

In FIG. 2, guide bars 47, 48, 4 are attached to a pair of hanging arms 45, 46 hanging from the horizontal bar 11.
9 and the sliding body 5 of the cutter support member 50
1 and 51 are slidably fitted into the guide bar 47 and the sliding body 52 is fitted into the guide bar 48, respectively, and switches 54 and 55 are fitted to the guide bar 49 at appropriate positions at intervals corresponding to the moving distance of the cutter 53. Provided so that changes can be fixed. Reference numeral 44 denotes the switches 54 and 55 from which the cutter support member 50 is protruded.
It is a protrusion that comes into contact with. Cutter support member 50
A cutter 53 is placed on. cutter 53
It has a circular cutter blade 56 at the bottom of the tip.
A piston rod 58 of a fluid cylinder 57 supported by the horizontal bar 11 is attached to the cutter support member 50, and the cutter support member 50 is reciprocated along the guide bars 47 and 48 by the operation of the fluid cylinder 57.

The hem cloth pressing member 10 has a piston rod 61 of a fluid cylinder 60 with a cup 62 for pressing the sewn product provided at the tip thereof, and the fluid cylinder 60 is vertically fixed to the horizontal bar 11 by a bracket 63.

Reference numeral 64 denotes a hook for preventing the swinging board 6 from falling when the swinging board 6 is rotated approximately 180 degrees and reversed, and is supported by the swinging board 6 with a shaft 65.
It is urged by a spring 66 to rotate in the clockwise direction in FIG. The hook 64 is locked to a locking pin 67 provided on the sewing machine head 1.

Reference numeral 68 denotes a swinging board fixing bolt, the base of which is screwed into the fixed board 3 through a hole 69 provided in the swinging board 6.

70 is a gripper installed on the swing base plate 6;
When reversing the swinging substrate 6, it is held and carried out.

71 is a sewing machine needle, 72 is a cloth presser, and 74 is a thread scooping member.

Next, the normal sewing procedure in the sewing machine of the present invention will be explained first.

The hem fabric for the collar of a yukata is supplied to the sewing machine in a long belt-shaped bag. The hem cloth is folded approximately in half in the width direction through a guide member, and when sewing a yukata or the like, the best end is inserted between the two folded hem cloths and sewn with a sewing machine needle 71. Become.

The product sewn with the sewing machine needle 71 is fed by a material feeding device of the sewing machine (not shown), is nipped between the pressure roll 17 and the table 73, and is fed by the rotation of the pressure roll 17.

Feeding of the product to be sewn during sewing is carried out as follows. Drive shaft 3 of sewing machine head 1 shown in Fig. 3
The rotation of the cam arm 32 via the eccentric cam 31
also moves left and right in FIG. 3, swings the swinging arm 29, and repeatedly rotates the repeating rotation shaft 28. Due to this rotation, the swinging arm 26 provided at the end of the repetitive rotation shaft 28 swings, and swings the swinging arm 21 via the connecting rod 25. Since the swinging arm 21 is connected to the roll shaft 16 via the one-way clutch 20 that transmits rotation in the direction of rotating the pressure roll 17 counterclockwise, the swinging of the swinging arm 21 causes the pressure roll to rotate. 17 rotates in the clockwise direction in Figure 1, and the workpiece is moved by the sewing machine needle 7
It will be sent in synchronization with the sewing according to step 1. When the sewing of the holding member such as the collar cloth of a predetermined length is completed, the needle 7
1 stops at the raised position, and the thread scooping member 74 (shown in FIG. 4) picks up and cuts the thread by actuation of a fluid cylinder. Next, although the sewing machine is stopped, only the hem cloth feed member 8 operates, and the workpiece is fed without sewing. fluid cylinder 2
3 is activated, swinging the swinging arm 19 via the link 22 connected to the piston rod 24 thereof.
The swinging arm 19 is connected to the roll shaft 16 at the same time as the swinging arm 21 via a one-way clutch 18 that transmits rotation in the direction of clockwise rotation of the pressure roll 17. 19 causes the press roll 17 to feed the workpiece in the clockwise direction in FIG. To determine this, the fluid cylinder 23 is actuated multiple times at once depending on the feed amount. For things like the collar of a yukata, 3 times is sufficient. Simultaneously with the operation of the fluid cylinder 23 described above, a fluid cylinder (not shown) is operated to raise the cloth presser 72, and the hem fabric is drawn in by the roll 17.

As a result of the above-mentioned feeding of the sewn product without sewing, a portion is created that is continuous only by the unsewn hem fabric. When this portion reaches a predetermined length, the rotation of the press roll 17 is stopped, and the cutter blade 56 of the hem cloth cutting member 9 cuts the hem cloth. Its operation order is as follows.

First, the fluid cylinder 60 (FIG. 1) is actuated to lower the cup 62 and press against the underlying hem. Next, the fluid cylinder 57 is actuated to move the cutter support member 50, which is in the solid line position in FIG. 2, to the right, and the cutter blade 56 cuts the hem fabric.
The cutter support member 50 moves to the right in FIG.
The fluid valve is switched to , thereby stopping the piston rod 58 and starting reverse rotation, and when the switch 54 is kicked by the protrusion 44, the backward movement is stopped. When the cutting of the hem fabric is finished, the fluid cylinder 6
0 operates and raises the cup 62, releasing the product to be sewn that had been pressed until then.

Sewing is normally performed by the above-mentioned operation, but when it becomes necessary to inspect the inside of the sewing machine head 1, the sewing machine head 1 must be tilted backwards. To do this, it is necessary to create a space on the back side of the sewing machine head 1 by rotating the swing base plate 6 about the shaft 7 in a clockwise direction in FIG. First, the pressure roll 17 is raised so as not to interfere with the rotation of the swing base plate 6, so that the pressure roll 17 and the table 73 are not pressed together during the rotation. To do this, the lever operating arm 39 is rotated clockwise about the shaft 40 in FIG.
By turning the lever 37 counterclockwise, the roll lifting shaft 14 is pulled up against the elastic force of the spring 15, and the pressing roll 17 and table 73 are lifted up.
Separate the surface.

Then, loosen and remove the fixing bolt 68,
After setting the fixed base plate 3 and the swing base plate 6 in a free state, hold the gripper 70 and turn the gripper 70 clockwise around the shaft 7 in FIG. 6 is inverted and fixed in an upright position.

After creating a space at the rear of the sewing machine head 1 in this way, the sewing machine head 1 is tilted to the rear by normal means, and if necessary, the sewing machine head 1 is supported by an appropriate supporting means such as a support member called a pillow.
support.

[Effects of the Invention] As described above, in the sewing machine of the present invention, the hem cloth feeding member, hem cloth cutting member, hem cloth holding member, etc. provided at the rear portion of the sewing machine head are provided on the swing base plate, and the swing base plate is rotated and reversed to stand upright. By doing so, each part can be positioned above the sewing machine head 1 and a space can be created at the rear of the sewing machine head.
It has become possible to tilt the sewing machine head backwards, making it extremely easy to inspect the lower part and inside of the sewing machine head.

[Brief explanation of drawings]

Fig. 1 is a left side view of the sewing machine of the present invention, showing the state in which the pressure roll of the feed member and the cup of the presser member are lowered, and Fig. 2 is a rear view of the same, showing the state in which the pressure roll of the feed member is raised. Figure 3 is a right side view showing the configuration between the sewing machine drive shaft and the repetitive rotation axis;
The figure is a left side view of the swinging board in a swiveling upright state. 1... Sewing machine head, 3... Fixed board, 4, 5
. . . Hinge, 6 . . . Swinging base plate, 8 .

Claims (1)

[Claims] 1. A fixed base plate is provided on the back side of the sewing machine head supported by a support member so that it can be tilted in the rear direction, and a hinge provided on the upper part of the fixed base plate allows the swing base plate to be rotated upward. A sewing machine having a hanging hinge attached to the base plate, and an attachment member supported on the swing base plate. 2. Both the swinging board and the fixed board have a locking member, and when the swinging board is rotated upward and stands upright, the swinging board and the fixed board are fixed in the upright state by the locking member. A sewing machine according to claim 1, which is a sewing machine.