JPH0659356B2 - Automatic fastener attachment device for futon covers - Google Patents

Description

TECHNICAL FIELD The present invention relates to a futon cover automatic fastener attaching device for automatically sewing a fastener attached to an opening of a futon cover to a cover cloth. .

[Conventional technology]

The conventional futon cover sewing process is as follows.

Overlap the front and back cover fabrics and sew the edges of all other sides except the center of one side of the cover fabric. Was sewn, and then the zipper was opened, and the inside was turned over. In all of these sewing operations by the sewing machine, the fabric is fed by hand.

Especially when sewing fasteners, not only are they sewn in the length direction, but at both ends in the length direction,
It is necessary to sew even along the lateral direction. Therefore, when sewing a fastener, the fastener is fed in the length direction and sewn, and when the end is reached, the operator changes the direction of the cloth by approximately 90 ° and the end of the fastener is sewn. Was sewn along the lateral direction.

For this reason, in the sewing process of the futon cover, the fastener attaching work is most troublesome, and this fastener attaching work reduces the sewing efficiency of the entire futon cover.

[Problems to be Solved by the Invention]

SUMMARY OF THE INVENTION The present invention has been made to solve the problem of increasing the sewing efficiency of a futon cover by automatically performing an essential fastener attaching operation in the sewing process.

[Means for Solving the Problems]

The present invention for solving this problem is an apparatus for automatically sewing a fastener to one edge of one of two cover cloths constituting a futon cover, and the cloth is fed by a feed dog of a sewing machine. When the defined direction is defined as a vertical direction, it is slidable on the needle plate across the feed dog in the lateral direction orthogonal to the vertical direction without contacting the feed dog, and A clamp tool having a structure in which an upper clamp piece is arranged to be able to move up and down directly above a lower clamp piece in which a long hole for avoiding interference is provided in a lateral direction, and a clamp tool arranged directly below an arm of a sewing machine. A reciprocating transverse feed means for reciprocating the clamp tool laterally with a stroke corresponding to the width of the fastener while maintaining the state where the feed dog is covered by the lower clamp piece constituting the clamp tool, and the sewing machine. of The clamp device is disposed immediately below the frame, and the clamp device is moved laterally to a large extent, and in the retracted position, the feed dog is not covered by the lower clamp piece. It is characterized in that it is provided with three members for advancing and retracting means for advancing and retracting.

[Operation of the invention]

In order to laterally sew the end portion along the length direction of the fastener and the cover cloth, the clamp tool is advanced to the part of the feed dog by the advancing and retracting means.

With this configuration, since the lower clamp piece that constitutes the clamp tool is located above the feed dog of the sewing machine in a non-contact state with the feed dog, even if the feed dog is operated by the operation of the sewing machine, The cover fabric on top of the lower clamp piece is not fed.

With the fastener overlapped on the edge of the cover fabric folded back with a predetermined width, until the end along the length direction of the fastener reaches the portion just below the sewing machine needle, the overlapped cover fabric and fastener When the upper clamp piece is lowered in this state, the cover cloth and the fastener are clamped by the upper and lower clamp pieces.

In this state, when the reciprocating transverse feed means is operated to reciprocate transversely feed the clamp tool, the end portion along the length direction of the fastener and the cover cloth are laterally sewn, and the clamp tool returns to the original position.

Next, when the clamp tool is largely retracted by the advancing / retreating means, the cover cloth is fed by the feed dog in a normal state, and when the cover cloth is fed by pressing the fastener with the pressing plate, one of the fastener pieces forming the cover cloth and the fastener is And are sewn vertically.

When the fastener is longitudinally sewn up to the other end along the length direction, the clamp tool is greatly advanced again by the operation of the advancing / retreating means, and the other end along the length direction of the fastener moves up and down. Then, in this state, the side stitching of this portion is performed in the same manner as described above.

〔Example〕

The automatic fastener attaching apparatus according to the present invention will be described in more detail with reference to FIGS. 1 to 3.

In the following description, the direction in which the fabric is fed by the feed dog of the sewing machine is defined as the vertical direction, and the direction orthogonal to this vertical direction is defined as the horizontal direction.

A pair of guide rails 2 is attached to the bed 1 of the sewing machine M, and the sliders 3 slidably fitted in the guide rails 2 are connected to each other by a connecting plate 4. The guide rail 2 is an arm 5 of the sewing machine M in plan view.
Located on both sides of.

A gate-shaped bracket 6 is attached to the lower part of the arm 5 in the bed 1, and the upper plate 6a of the bracket 6 is attached.
A lateral feed air cylinder 7 for reciprocally laterally feeding a later-described clamp tool C in the lateral direction (which means a horizontal direction perpendicular to the cloth feeding direction) is attached along the lateral direction.

A bracket 8 is attached to a connecting plate 4 connecting the pair of sliders 3 described above, and an advancing / retreating air cylinder for advancing / retracting the clamp tool C in the lateral direction greatly on the side surface of the bracket 8. 9 is attached. The advancing / retreating air cylinder 9 is located below the transverse feeding air cylinder 7, and the rods 7a and 9a of the air cylinders 7 and 9 are directed in the direction opposite to the sewing machine needle 11 and the tip thereof. The parts are connected to each other by a connecting plate 12.

A clamp tool mounting plate 13 is vertically fixed to a side surface of the bracket 8 opposite to the side surface on which the advancing / retreating air cylinder 9 is mounted. The clamp tool C is attached to the lower end portion of the clamp tool mounting plate 13. The base end portion of the lower clamp piece 14 that is configured is fixed. In addition, a horizontal plate 15 is provided at the center of the clamp attachment plate 13 in the height direction.
The upper clamp piece 17 constituting the clamp tool C is attached to the lower end of the rod 16a of the lifting air cylinder 16 attached to the upper surface of the horizontal plate 15.

Therefore, when the rod 7a of the lateral feed air cylinder 7 is moved in and out, the advancing / retreating air cylinder 9 itself moves and the clamp tool C reciprocates laterally. When the rod 9a of the advancing / retreating air cylinder 9 is largely moved in and out, the rod 9a does not move but its main body 9b moves in the lateral direction, so that the clamp tool C greatly advances in the lateral direction. , Retreat.

As shown in FIG. 4, the clamp tool C has a state in which a fastener F is overlapped with an end portion of the cover fabric 18 folded back with a predetermined width, and the end portion of the fastener F along the length direction is The upper and lower clamp pieces 14 and 17 are for clamping the part from above and below.

The lower clamp piece 14 has a structure in which both ends of a flat plate are bent so that the lower clamp piece 14 can slide on the needle plate 21 across the feed dog 19 so as not to contact the feed dog 19 of the sewing machine M. (See Fig. 9). The lower clamp piece 14 is provided with a long hole 22 along the lateral direction in order to avoid interference with the sewing machine needle 11 during lateral feeding, and is inserted below the cover fabric 18 at one end in the width direction. Insertion guide piece 2
3 are integrally provided along the lateral direction.

The upper clamp piece 17 is arranged immediately above the lower clamp piece 14, but its width is narrower than the width of the lower clamp piece 14, and one side of the elongated hole 22 provided in the lower clamp piece 14 in plan view. (The side to which the cover fabric 18 is fed). The reason for arranging in this way will be described later.

Next, the operation of automatically sewing the fastener F to the edge portion of the cover fabric 18 by the automatic fastener attaching apparatus according to the present invention will be described with reference to FIGS. 1 to 8. In the automatic fastener attaching apparatus according to the present invention, the cover cloth 18 is made of a single cloth, and the fastener F is sewn on the outer cloth in most cases.

FIG. 3 shows a state in which the rod 9a of the advancing / retreating air cylinder 9 is retracted, and the clamp tool C is located at the retracted end. In this state, when the rod 9a of the advancing / retreating air cylinder 9 is projected to the maximum, the clamp tool C advances to the position shown in FIG. 4, and the feed dog 19 of the sewing machine M is hidden by the lower clamp piece 14. . Hereinafter, the position of the clamp tool C shown in FIG. 4 will be referred to as the origin position.

In the state where the clamp tool C is located at the origin position,
The fastener F is put on the end portion of the cover cloth 18 folded back to have a width substantially the same as the width of the fastener F, and the fastener F is fed into the sewing machine needle 11 and, as shown in FIG. The tip portion along the lengthwise direction of the machine slightly passes the portion directly below the sewing machine needle 11. When the upper clamp piece 17 is lowered by the lifting air cylinder 16 in this state, as shown in FIG.
And are clamped by the upper and lower clamp pieces 14 and 17 at the tip portion along the length direction of the fastener F.

Here, since the upper clamp piece 17 is arranged only on one side of the elongated hole 22 provided in the lower clamp piece 14, the metal fitting 25 of the fastener F located on the other side of the elongated hole 22 is pressed. I do not attach it.

In this state, when both the traverse air cylinder 7 and the sewing machine M are operated, the rod 7a of the cylinder 7 retracts, and the clamp tool C clamps the cover cloth 18 and the fastener F and the Is moved laterally in the forward direction indicated by
When lateral stitching (Sa) of the tip end portion along the length direction of the clamp tool C is started and the clamp tool C reaches the forward end, the rod 7a of the cylinder 7 projects and the clamp tool C returns to the original position. As a result, the end portion of the fastener F along the length direction is laterally sewn (Sa). The stroke of the lateral feed air cylinder 7 corresponds to the width of the fastener F. In addition, as a matter of course, the presser plate 24 of the sewing machine M remains raised during the lateral sewing.

When the lateral sewing of the fastener F is completed in this way and the clamp tool C returns to the original position, the advancing / retreating air cylinder 9 operates and the clamp tool C moves backward, as shown in FIG. Retreat to the edge. Even when the clamp tool C is retracted to the retracted end, the insertion guide piece 23 provided on the lower clamp piece 14 is covered by the cover cloth 18 for a predetermined length.
Is inserted below.

When the clamp tool C retracts to the retracted end, the cover cloth 18
Is in a normal state in which it is fed by the feed dog 19, and as shown in FIG. 7, the tape piece Fa inside the fastener F is held down by the lowering of the holding plate 24,
The cover cloth 18 and the fastener F are sent together, and the tape piece Fa inside the fastener F is vertically sewn (Sb).

When the rear end portion along the length direction of the fastener F is vertically sewn (Sb), the operation of the sewing machine M is temporarily stopped, and the clamp tool C is moved forward again by the operation of the advancing / retreating air cylinder 9. As shown in FIG. 8, lateral sewing (Sa) of this portion is performed. In addition, since the insertion guide piece 23 provided in the lower clamp piece 14 is inserted below the cover cloth 18 when the clamp tool C moves forward, the lower clamp piece 14 does not hook the cover cloth 18, It is smoothly inserted under the cover fabric 18.

Since the above-mentioned operations are continuously performed, as shown in FIG. 10, the cover fabric 18 folded back with a predetermined width is used.
The fastener F is automatically sewn to the edge of the.

Then, as shown in the schematic cross-sectional view of FIG. 11, in the state in which the cover cloth 18 for the lining is overlaid on the cover cloth 18 'for the lining, the peripheral portions thereof are sewn together ( Sc).

However, in the portion of the fastener F, the tape piece Fb on the outside thereof and the cover cloth 18 'for the lining are sewn together (Sc). Then, the fastener F is opened, and the sewn front and back cover fabrics 18, 18 'are turned upside down through the opening to obtain a finished futon cover as shown in the schematic sectional view of FIG. The eleventh
In FIG. 12 and FIG. 12, 18a indicates a portion where the end portion of the cover fabric 18 is folded back.

It should be noted that the above example is merely an example of the present invention, and various modifications can be made. For example,
It is also possible to use a cam, or a combination of a ball screw and a ball nut, instead of the air cylinder, as the reciprocating transverse feed means for reciprocating the clamp tool C and the advancing / retreating means.

〔The invention's effect〕

According to the present invention, it is possible to automatically perform the most troublesome fastener attaching work in the step of sewing the futon cover, and the sewing efficiency of the futon cover can be remarkably increased as compared with the conventional case.

In addition, when carrying out the invention, it is sufficient to simply mount the device according to the present invention on the bed of the conventional sewing machine, and no major modification of the conventional sewing machine is required, so that it can be carried out at low cost.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which the automatic fastener attaching apparatus according to the present invention is mounted on a sewing machine M, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIGS. The perspective view of the part of the clamp tool C in a different state, 9th
The figure shows a cross-sectional view of the feed dog 19 hidden by the lower clamp piece 14, FIG. 10 is a plan view of the fastener-covered cover fabric 18, and FIG. 11 is a fastener-attached cover fabric for cover material. 18 and cover fabric for lining 1
FIG. 12 is a schematic cross-sectional view showing a state in which 8 ′ and 8 ′ are overlapped and the periphery thereof is sewn together, and FIG.
It is a cross-sectional schematic diagram of the state which turned over the cover cloths 18 and 18 'of the front and back which were sewn together through this opening part, and was set as the finished product of a futon cover. The explanation of the reference numerals of the main parts constituting the present invention is as follows. C: Clamping tool, F: Fastener Fa, Fb: Fastener tape piece M: Sewing machine 7: Side feed air cylinder (reciprocating side feed means) 9: Forward / backward air cylinder (forward / backward movement means) 14: Lower clamp piece, 17: Upper clamp piece 19: Feed dog, 24: Presser plate

Claims (1)

[Claims] 1. A device for automatically sewing a fastener to one edge of one of two cover fabrics forming a futon cover, wherein the fabric is fed by a feed dog of a sewing machine in a longitudinal direction. In the defined case, without contact with the feed dog,
Immediately above the lower clamp piece, which is slidable on the needle plate in the lateral direction across the feed dog and orthogonal to the vertical direction, and in which the oblong hole is provided in the lateral direction to avoid interference with the sewing machine needle. The upper clamp piece is arranged so that it can be lifted up and down, and the lower clamp piece that is arranged directly below the arm of the sewing machine and that constitutes the clamp tool keeps the feed dog covered. And a reciprocating transverse feed means for reciprocating the clamp tool in a lateral direction with a stroke corresponding to the width of the fastener, and also disposed just below the arm of the sewing machine, for laterally feeding the clamp tool, Equipped with advancing / retreating means for advancing / retreating the clamp tool with respect to the feed dog so that the feed tooth is not covered by the lower clamp piece at the retracted position, and is folded back with a predetermined width. The fastener is overlapped with the edge of the cover fabric, and the fastener and the cover fabric are clamped by the clamp tool at the end along the length direction of the fastener, and While the feed dog is covered with the clamp piece, the clamp tool is reciprocally traversed by the reciprocating traverse means, thereby laterally sewing the end portion along the length direction of the fastener and the cover cloth, and The retracting means is largely retracted with respect to the feed dog by the advancing / retreating means so that the feed tooth is not covered by the lower clamp piece, and the cover cloth is vertically fed by the feed tooth to thereby cover the cover cloth and the fastener. With an automatic fastener for a futon cover, which is configured to sew vertically one of the fastener pieces that make up the Apparatus.