JPH0667419B2 - Tack sewing device with automatic sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tack sewing device using an automatic sewing machine.

(Prior Art) Tack sewing using an automatic sewing machine is performed by automatically displacing the sewing machine needle and the fabric relative to each other along the tuck shape. The cam and its follower are made to appear purely mechanically.

(Problems to be Solved by the Invention) In the tack sewing by the conventional means as described above, a sudden curved surface change of the cam is not preferable for the cam, and
Since the follower is difficult to follow the sudden curved surface change of the cam due to the inertial force acting on itself, the sewing machine needle and the cloth cannot be relatively displaced along the tuck shape having the corners. Therefore, the bent part of the tuck stitch becomes a rounded one without forming an angular seam locus, and the tuck stitch made in this way is not neat to the eye, and the sewing strength of the bent part is There is an adverse effect such as being reduced and fraying from the portion.

An object of the present invention is to provide a tack sewing device by an automatic sewing machine that enables tack sewing that does not cause such an adverse effect.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, the cloth positioned between the sewing machine worktable and the sewing machine head is displaced along a constant tack sewing locus by an X / Y direction driving device. The characteristic feature is that automatic tack sewing is performed using an automatic sewing machine that is designed to do so.Specifically, a laying plate and a presser are arranged between the sewing machine work table and the sewing machine head in order from below. , A tuck stitch-shaped through hole is provided at a fixed position on the laying plate, and a hole having a similar shape to that is provided at a fixed position corresponding to the through hole on the other hand so that the cloth can be held by the laying plate and the holding plate. On the other hand, on the rear side of the other side of the retainer, a downwardly slidable comb tooth body having a plurality of downwardly curved bending teeth arranged horizontally at equal intervals is provided slidably up and down. In relation to the operation of the comb It is characterized in that it is provided with a fabric supply plate that advances and retracts laterally.

(Operation) Since the cloth is displaced by the X / Y direction drive device,
Since there are no conventional problems such as those caused by the cam and the follower, the sewing machine needle and the cloth can be accurately displaced relative to each other along the planned tuck stitch locus, and as a result, the angular bend as planned can be obtained. Is formed.

(Example) Hereinafter, the apparatus of the present invention will be described with reference to the drawings.

1 to 6 are views showing the device of the present invention.

In the figure, reference numeral 1 is a sewing machine workbench, 2 is a sewing machine head arranged above the workbench, and a needle bar 4 to which a needle 3 is fixed is provided at a tip portion thereof.

A floor plate 5 and a presser 6 are provided between the workbench 1 and the sewing machine head 2. This laying plate 5 is a rectangular synthetic resin plate, and a through hole 7 having a tuck stitch shape consisting of a rectangular portion 7a and a slanted groove portion 7b is provided at a certain position thereof and is placed on the workbench 1. State. The presser 6 has a plate shape, and a through hole 6a having the same shape as the through hole 7 is provided at a fixed position thereof.

On the other hand, below the workbench 1, there are provided vertical X and horizontal Y direction driving devices (not shown). The drive unit includes an output member 8a,
The output members 8b, 8c, 8d, and 8e can be displaced in orthogonal directions along the upper surface of the workbench 1, that is, in the X direction and the Y direction, through an electronic control unit (not shown). It is supposed that 8a, 8b, 8c, 8d and 8e are moved along an arbitrary locus. Here, the electronic control unit makes it possible to store a plurality of pieces of tack sewing information in the storage unit by using an appropriate input unit, and at the same time, selects a desired one from the stored information by operating the selection switch, and makes this selection. The drive device can be operated based on the information.

Reference numeral 9 denotes an L-shaped support arm, the base portion 9a of which is fixed to the output member 8a of the vertical X / horizontal Y direction driving device, and an enlarged portion 9b having an upright surface is formed at the tip thereof. On the front side of the enlarged portion 9b, a supporting member 10 to which the pressing member 6 is fixed is slidably guided up and down, and in this example, a supporting member 10 which will be described later is provided at a position adjacent to the supporting member 10. Similarly, the support member 12 to which the interlocking comb tooth body 11, which is a part, is fixed is slidably guided in the same manner. Here, the latter support member 12 is configured so as to be vertically movable by an air cylinder 14 fixed to the output member 8d via a lever 13 pivotally attached to one side surface of the arm 9, and the former support member
The reference numeral 10 indicates that it can be moved up and down by an air cylinder 16 which is also fixed to the output member 8d via a lever 15 (see FIG. 4), only a part of which is pivotally attached to the other surface of the arm 9. It has been done. The locking comb tooth body 11 is a support member.
It is composed of a rod 11a fixed to 12 and a large number of bent teeth 11b ... At this time, the locking rod 17 is extended from the rod body 11a or the same body portion as the rod body 11a so that the tip 17a thereof is located at an appropriate position away from the pressing member 6, and the tip 17a can press the upper surface of the floor plate 5. Is preferred.

Reference numeral 18 denotes a supply plate that forms a cloth supply device 19 together with the locking comb teeth 11 and is moved forward and backward in the Y direction by an air cylinder (not shown) that is operated in association with the operation of the locking comb teeth 11. It has been done. A graduation m is carved on the front edge of the supply plate 18, and a large number of notches 18a are provided corresponding to the positions of the curved teeth 11b ... And the tips of the locking rods 17.

In the present invention, tack sewing is carried out using the automatic sewing machine configured as described above, and specifically, for example, the following is performed.

That is, first, the cloth w is folded in two on the supply plate 18 as shown in FIG. 5 and hooked, and as shown in FIG. 2, the supply plate 18 is operated by operating a foot switch or the like (not shown) while holding it by hand. In the Y direction. The pressing member 6, the interlocking comb teeth 11 and the interlocking rod 17 are separated from the floor plate 5 by the upward displacement of the support member 12.

As shown in FIG. 3, the supply plate 18 automatically enters between the laying plate 5, the presser 6 and the interlocking comb tooth body 11, and its front edge is located directly below the curved teeth 11b. It will stop temporarily when it reaches. Then, in connection with this, the comb teeth 11 for locking and the locking rod 17 are lowered by the downward displacement of the support member 12, and press the front edge of the cloth w against the upper surface of the spreader plate 5. Since the bending teeth 11b ... And the tips 17a of the locking rods 17 are located within the cutouts 18a of the supply plate 18, only the cloth w is pressed down onto the spreading plate 5. Subsequently, the supply plate 18 is automatically retracted to the original position and stopped until the next operation command is issued. This retreating cloth w is given a force such that it is pulled out together with the supply plate 18 due to the friction with the supply plate 18, but it is ensured by the engaging force of the bent teeth 11a ... And the tip 17a of the engaging rod 17. Held in the same position.

On the one hand, the presser 6 is lowered by the downward displacement of the support member 10 in connection with the fact that the supply plate 18 has come out and the cloth w is laid on the plate 5.
It will be pressed against the upper surface.

Next, as shown in FIG. 4, the needle 3 starts the sewing operation, and at the same time, the longitudinal X and lateral Y direction driving devices are actuated, and
The presser 6, the interlocking comb teeth 11 and the interlocking rod 17 are displaced based on one piece of tack sewing information previously selected by the selection switch. As a result, the needle 3 and the cloth w are relatively displaced through the tack sewing locus based on the selected tack sewing information, and the stitch shape s as shown in FIG.
The tack sewing of is carried out. This cloth w is the floor board 5
Under the condition of being sandwiched between the presser 6 and the presser 6,
Since the tack sewing is performed within the overlapped range of 8, the seams are provided exactly along the planned tack sewing locus. Therefore, if the tack sewing information input to the storage device is appropriate, the bending portion a of the tack sewing is made completely square due to the operating characteristics of the longitudinal X and lateral Y direction drive devices. .

When the tack sewing is completed in this way, the pressing member 6, the interlocking comb tooth body 11 and the interlocking rod 17 are returned to their original positions by raising the support members 10 and 12. After this state, the fabric w is automatically removed to another place by the jetting force of air or moved to another place manually. With the above, one tack sewing operation is completed, and thereafter, the above processing is repeated.

In addition, different shapes s1 and s2 as shown by the two-dot chain line in FIG.
When the tack sewing is performed, the selection switch of the electronic control unit is operated to select other corresponding tack sewing information.

(Effects of the Invention) According to the present invention, the bent portion of the seam after tack sewing can be made into a beautiful shape with an angular shape, and this can increase the strength of the seam of the bent portion. It can be an excellent tack.

Specifically, the cloth can be held on the edge of the fold line at the starting end of the tuck stitch, and after that, it can be accurately displaced, so that the tuck stitch can be properly performed as planned.

According to the second aspect of the present invention, it is possible to easily cope with the case where tack sewing of different sizes is performed.

[Brief description of drawings]

1 to 5 relate to the present invention, FIG. 1 is a perspective view showing an automatic sewing machine, FIG. 2 is a view showing a state in which a tack sewing operation is started, and FIG. 3 is a cloth laying board. And FIG. 4 is a longitudinal sectional view showing a state in which the cloth is hooked on the supply plate, and FIG. 6 is a view showing a state in which the cloth is hooked on the supply plate. It is a figure which shows the cloth by which tuck sewing was implemented. 1 ... sewing machine workbench, 2 ... sewing machine head, 3 ... needle,
5 ... Floor board, 6 ... Presser, 7 and 8 ... Through hole, w ...
… Fabric.

Claims (2)

[Claims] 1. An automatic sewing machine which is arranged between a workbench and a sewing machine head to be displaced along a constant tack sewing locus by a longitudinal X and lateral Y direction drive device for fabric, A laying plate and a presser are arranged in order from the bottom between the sewing machine workbench and the sewing machine head, and a tuck stitch-shaped through hole is provided at a certain position of the laying plate. A through hole of the same shape is provided, and the cloth is held by the floor plate and the presser.On the other hand, on the back side of the presser, a large number of downwardly curved bending teeth are arranged at equal horizontal intervals. By means of an automatic sewing machine characterized in that the locking comb teeth are provided so as to be slidable up and down, and a fabric supply plate that advances and retracts in the lateral direction is provided in association with the operation of the locking comb teeth. Tuck sewing device. 2. A vertical X / horizontal Y direction drive device is incorporated with an electronic control unit in which a plurality of pieces of tack sewing information are input, and the tack sewing information extracted by operating a selection switch of the electronic control unit is used in the vertical X / horizontal Y direction. The tack sewing device by the automatic sewing machine according to claim 1, wherein a drive device is operated.