JPS6028385Y2 - Bead forming device - Google Patents

Description

[Detailed explanation of the invention] As shown in Fig. 4, this invention consists of folding the edge decoration cloth P in an inverted T-shape and overlapping it on the sewing material W that constitutes the body fabric of the garment, and then After overlaying the flap cloth F on the decorative cloth P, these cloths are transferred between three positions sandwiching the stitching point of the sewing machine (the passing point of the sewing machine needles 8, 8 with respect to the stitching plane). Two parallel machine stitches S are performed on the inner side of the bent ends on both sides of the cloth P, and at the same time as these cloths are sewn, a knife that operates in synchronization with the sewing mechanism is used to sew between these two seam lines S. The present invention relates to a bead forming device which cuts pocket holes in the bead.

Conventionally, this type of device is known as described in Japanese Patent Application No. 53-69129, and according to this, as in the configuration of the present application described later, body fabric W is placed on a workbench using a fabric presser. Then, the edge decoration cloth P is bent and held thereon in an inverted T-shape by the edge decoration cloth presser in cooperation with the folding mechanism, and the flap cloth F is superimposed on one of the folded portions. The flap cloth F is pressed and held from above by a flap presser foot, and in this state, these cloths are transferred to the sewing machine sewing section, and the leading and trailing ends of the flap cloth F are detected by an optical sensor in front of the sewing section in the cloth transfer direction, Based on these detections, the sewing machine was driven and stopped via a control circuit such as a microcomputer.

Therefore, in order to sew a pocket without flap cloth F, in addition to the conventional operating body, there is also an operating body as a means for inputting a command to disable the optical sensor into the control circuit, and the length of the pocket hole is set in advance. However, it is necessary to provide operating bodies as a means to memorize the information in the control circuit, and to operate these operating bodies. In the case of something that is unlikely to last, you will have to re-operate the above operating body each time, so
These operations are complicated and work efficiency is reduced.

The purpose of this invention is to solve the above-mentioned drawbacks of the conventional technology by using a simple structure in which the cover plate facing the optical sensor is provided so as to be movable and lockable with respect to the flap presser foot.

Examples of this invention will be described below with reference to the drawings.

As described in Japanese Patent Application No. 53-69129 filed by the applicant of the present application, the bead forming device shown in FIG. A cloth transfer mechanism for transferring the decorative cloth P and the flap cloth F from the first position indicated by the two-dot chain line in FIG. 1 to the second position indicated by the solid line in FIG. 3, and an edge decoration cloth presser 4 provided on the cloth transfer mechanism 3 in its first position.
Between the folding mechanism 5 having a presser foot 5a for folding and overlapping the hemline cloth P on the body material W in an inverted T-shape in cooperation with 4 and the cloth transfer mechanism 3, A center knife mechanism 6 that cuts out a pocket hole (not shown) between two seams S to be sewn, and a corner knife that makes wedge-shaped cuts at both ends of the pocket hole when transferred to the second position. It consists of a mechanism (not shown) and a control device (not shown) for controlling each of these mechanisms and the sewing machine in a predetermined order.

The sewing machine 2 is a known two-needle sewing machine that is equipped with two sewing machine needles 8 at the lower end of the needle bar 7 and is linked to a sewing machine motor (not shown). A slit 9 parallel to the left side of FIG. The center knife 6 is provided so as to protrude and retract from the upper surface of the throat plate in synchronization with the needle bar 7.

The workbench 1 is formed with a groove 10 extending vertically and penetratingly along the cloth transfer direction at the rear of the sewing machine 2.
A guide shaft 11 and a screw shaft 12 are supported along the groove 10, and the screw shaft 12 is configured to rotate in forward and reverse directions in conjunction with a transfer pulse motor (not shown).

The cloth transfer device 3 has a lower portion connected to the screw shaft 12 and the guide shaft 1.
1 and is movable in the axial direction in conjunction with the rotation of the screw shaft 12, and is supported by a shaft 14 on the upper part of the base 13 that protrudes above the workbench 1 from the groove 10, Although not shown, a pair of clamp arms 15, 15 are always pulled up by the elastic force of a spring and pushed down via an air cylinder, and a pair of clamp arms 15 are fixed to the free ends of both clamp arms 15. Body fabric presser 16.16
and receiving plates 17, 17 which are spaced apart and fixedly arranged above the body material presser 16 and 16, and the body material presser 16 and the receiver are arranged between the plates 17, and the spring is always placed at the position indicated by the two-dot chain line in Fig. 2. The edge decoration presser foot 4, 4 is movable via an air cylinder to the position shown by the solid line in the same figure, and the spring is always maintained in the position shown by the two-dot chain line in Fig. 2. It also consists of a flap presser foot 18.18 which is pressed to the position shown by the solid line in the figure through an air cylinder 19.19.

The relationship between the cloth transport mechanism 3 and the folding mechanism 5 is as follows.
At the position indicated by the two-dot chain line in the figure, insert the body cloth W between the lower surface of the body cloth presser 16 and the upper surface of the workbench 1, and then press the foot pedal (
(not shown) to the first stage, both clamp arms 15.15 are rotated clockwise in FIG.
．． 16 descends and presses the body material W. Next, insert the edge decoration cloth P so that its center is located between the inner edges of the body part pressers 16, 16, and depress the foot pedal to the second step. As a result, the presser foot 5a of the folding mechanism 5 presses the fabric on both sides 16.
After descending for 16 seconds and pressing the center of the hemline cloth P onto the body material W, the hemline cloth pressers 4, 4 move to the position shown by the solid line in FIG. 2 via an air cylinder, and press the hemline cloth P. The left and right sides of the fabric are bent into an inverted T-shape along the periphery of the presser foot 5a, and then the edge to which the flap fabric F is to be sewn is located on one of the folded parts of the hemline fabric P. By placing it on one of the receiving plates 17 and depressing the pedal to the third stage, the flap presser foot 18.18 is rotated to the position shown by the solid line in FIG. 2 via the air cylinder 19.19. It is pressed onto the folded portion of the edge cloth F.

For the detailed structure and operation of each mechanism and each part described above, please refer to the specification and drawings of Japanese Patent Application No. 1983-69129 cited above.

As shown in Fig. 1, both flap presser feet 18.18 have elongated holes 20.20 extending vertically and extending parallel to the cloth transfer direction. The upper surfaces of the decorative cloth presser feet 4, 4 are used as reflective surfaces, and the sewing machine jaw section of the sewing machine 2 located before the sewing point in the cloth transport direction is provided with a mirror in the setting state shown by the solid line in FIG. 2 at the position shown by the two-dot chain line in FIG. Two sets of detection means 21.21 consisting of a light-emitting body that irradiates light from above toward the elongated hole 20.20 and a light-receiving body that receives the light reflected from the edge decoration presser foot 4, 4.
Set up.

Further, positioning means 25, 25 for indicating or regulating the rear end position of the flap cloth F are provided on the upper surfaces of the receiving plates 17, 17, and positioning means 25, 25 are provided below the workbench 1 in the vicinity of the moving path of the base 13 of the cloth transfer mechanism 3. An end detection device consisting of a non-contact switch is installed, and by moving the cloth transfer mechanism 3 to the left in FIG. When the rear end of the flap cloth F placed on the positioning means 25.25 reaches the detection point of the detection means 21.21, the end detection device detects the base 13 of the cloth transfer mechanism 3. and in connection with this detection, the operation of the sewing machine is stopped.

Furthermore, as shown in FIG. 3, the flap presser foot 18 is provided with a scale 26 on one side of the elongated hole 20 indicating the distance from the positioning means 25, and a flat scale slightly wider than the width of the elongated hole 20. The cover plate 22 can be moved and locked in the cloth transfer direction by means of a step screw 23 screwed into the flap presser foot 18 and a long hole 24 provided in the cover plate 22 so as to loosely fit into the shaft portion of the step screw 23, thereby allowing the cover plate 22 to move and lock in the cloth transfer direction. The length of the edge decoration cloth presser foot 4 exposed from the edge decoration cloth presser foot 20 is configured to be changeable.

This invention has the above structure, and its operation will be explained next.

As described above, the flap cloth F is placed on the receiving plate 17 at the position indicated by the two-dot chain line in FIG. At the same time, loosen the stepped screws 23, move the cover plate 22, align its front edge 22a with the front edge of the flap cloth F, tighten the screws 23, lock the cover plate in that position, and then remove the ball. Start the edge forming device.

As a result, the cloth transfer mechanism 3 moves to the left in FIG. The sewing machine 2 remains stopped while the light is being received.

Then, as the cloth transfer mechanism 3 moves further, the cover plate 22 blocks the light from the light emitting device falling on the upper surface of the hemline cloth presser foot 4, and the sewing machine 2 is driven, and the sewing machine 2 is moved to a position inward from both bent ends of the hemline cloth P. At the same time, the center knife 6 opens a pocket hole between the two seams S formed by the sewing machine, and after sewing the flap cloth F up to the rear edge of the flap cloth F, the sewing machine 2 stops and the cloth is transferred. The mechanism 3 further advances to the position shown by the solid line in FIG. 1, at which point a wedge-shaped cut is made at both ends of the pocket hole by the corner knife mechanism.

The above action is for sewing the flap cloth F, but since the sewing machine 2 starts when the light from the light emitter is blocked by the cover plate 22, the front edge of the flap cloth F is sewn as described above. Once the position of the cover plate 22 has been adjusted according to When the forming device is started, the welt edge of the pocket without the flap cloth F can be sewn by the same operation as described above.

In the above embodiment, the sewing end position is predetermined by the end detection device, and only the waist sewing start position can be arbitrarily set by moving and adjusting the position of the cover plate 22 in accordance with the length of the flap cloth F. However, on the contrary, the sewing start position may be set in advance by a detection device similar to the end detection device described above, and the sewing end position may be set by the covering plate 22. Instead of the above detection device, the circumferential positions of the sewing start and sewing end may be arbitrarily set using the cover plate 22.

As described above, according to this invention, the flap presser foot is formed with vertically penetrating elongated holes facing the detection means along the cloth transfer direction before or after the cloth is transferred, and the long holes are formed on the upper surface of the edge decoration presser foot. A reflective surface facing the hole is provided, and a cover plate is provided on the flap presser foot that overlaps the elongated hole so as to block the light from the light emitter and is movable and lockable in the cloth transport direction. Since the position of the pocket can be set depending on the position of the cover plate, pockets with flap cloth and pockets without flap cloth can be operated in exactly the same way. Therefore, the control circuit of this type of device can be switched depending on the presence or absence of flap cloth. This eliminates the need for an operating section and associated circuits, which simplifies the device, and eliminates the need to reselect the operating section of the operating panel depending on the presence or absence of a flap cloth, making the operation easy and hassle-free. It has the effect of significantly improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a perspective view of this device, Fig. 2 is a longitudinal sectional view showing the state of cooperation between the cloth transfer mechanism and the folding mechanism, Fig. 3 is an enlarged perspective view of the flap presser foot, and Fig. 4 is a body cloth FIG. 2 is a perspective view showing the sewing state of the edge decoration cloth and the flap cloth. 2... Sewing machine, 3... Cloth transfer mechanism, 4
...Edge decoration presser foot, 5...Folding mechanism, 16...Fabric presser foot, 1B...Flap presser foot, 21...・Detection means, 22...
... Cover plate, 24 ... Long hole, W ... Body fabric, P ... Edge decoration cloth, F ... Flap cloth.

Claims (1)

[Scope of utility model registration request] A sewing machine with two needles fixedly placed in the middle of the workbench, and a folding mechanism that has an inverted T-shaped cross section with a width narrower than the distance between the sewing machine's two needles and can descend into the sewing machine's suture area and rise out of the sewing area. 5, a body fabric presser 16 that presses the body fabric constituting the garment onto a workbench, and a hem fabric presser 4 that folds and holds the hem fabric in an inverted T-shape in cooperation with a folding mechanism thereon. It also has a flap presser foot 18 for superimposing and holding the flap fabric of the pocket on the edge decoration presser foot, and is movable along the top surface of the workbench between three positions where the sewing machine seam is to be narrowed. 9 Consists of a set of light emitter and light receiver placed above the workbench, it is capable of detecting the leading or trailing end of the flap cloth before the sewing machine sewing section in the cloth transport direction, and outputting a signal based on these detections. The detection means 21
and a control means for driving the sewing machine in response to a detection signal of the leading edge of the flap cloth by the detection means and stopping the sewing machine in response to a detection signal of the trailing edge of the flap cloth. A long hole 24 extending vertically in the cloth transfer direction and facing the detection means before or after cloth transfer.
A reflective surface facing the long hole is provided on the top surface of the edge decoration presser foot, and the flap presser overlaps with the long hole so as to block the light from the light emitter, making it possible to move and lock in the cloth transport direction. Cover plate 2
A bead forming device characterized by comprising: 2.