JPH02280792A - Fastener sewing-on sewing machine - Google Patents

Abstract

PURPOSE:To enable continuous sewing collectively including the sewing-on operation of a fastener, and to improve sewing efficiency without requiring a skillful technique by forming a sewing seem on a lower surface cloth in such a condition that an upper surface cloth has been turned over, and also by moving the final sewing seam of the lower surface cloth in a position being out of place from the edge of the upper surface cloth, so that the sewing seam can be formed on the upper surface cloth from the lower surface cloth. CONSTITUTION:When the subject sewing machine is started, a pressing foot PF is abutted on the upper surface of a lower surface cloth A2. Next, an upper surface cloth A1 is turned over, and also the lower surface cloth A2 is fixedly pressed down, and then sewing of a first side part being overlapped with a fastener F is started. On this side of the sewing terminal end of the first side part, a cloth turning-over plate T engages a cloth-hitting part T1 with the edge of the upper surface cloth A1 being turned over so as to be held, so that a cloth contacting part P is set apart from the opening end part. Then at the final needle- sticking point of the first side part, the final sewing seam is formed in a position being out of place by one needle. And the edges of the upper surface cloth and the lower surface cloth are overlapped, and sewing of the lower edge part is carried out in continuation with the final sewing seam of the first side part. Then sewing of the second part being the overlapped part of the upper surface cloth A1 and the fastener F is carried out to finish a series of sewing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a zipper sewing machine for sewing a zipper onto a skirt or the like.

[Prior Art] Generally, sewing a zipper onto cloth or the like is considered to be one of the more complicated operations among many sewing processes.

For example, when attaching a zipper to a skirt, as shown in FIG. 9, the outer material W of the skirt and the lining W2 on which the zipper F has been sewn in advance are overlapped, and the open part A of the outer material W and the zipper F are overlapped. While aligning the two, sew around the fastening teeth part F of the zipper F in a U-shape.

Currently, a fastener fixing device as shown in FIG. 10 has been proposed for use in such complicated fastener sewing operations.

This fastener fixing device has two frames 1a.

1b rWIrjI! The positioned outer material W and lining material W2 are held and fixed by the freely connected cassette 1, and the cassette 1 is moved in the X-Y direction on the sewing machine table 2 by an X-Y drive device (not shown). Both fabrics W, together with the cassette 1, are mounted on the stand 3, and moved by this moving stand 3.
The above-mentioned U-shaped seam is formed by moving W.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, since the sewing process is complicated, skill is required for the work, and sewing efficiency is inevitably extremely low.

That is, the fastener sewing operation in the above-mentioned prior art is performed in the order shown in FIG.

First, as shown in FIG. 5A, while the upper outer fabric A1 is turned over, the lower outer fabric A2 and one end of the zipper F are sewn from a starting point B to an ending point C.

By the way, when sewing with such a sewing machine, it is necessary to perform reverse stitching at the sewing start point and sewing end point as sewing thread fixing work, so reverse stitching is performed at the above-mentioned points B and 0, and After the reverse stitching is completed, the thread cutting operation is performed, and the sewing operation is temporarily stopped at this zero point.

Then, as shown in FIG. 2B, the upper outer fabric A1 is released from being turned over, and the upper outer fabric A1 is overlapped on the zipper F and the seam B-C.

Next, as shown in the same figure (C), the upper outer fabric A1 and the lower end of the zipper F are backstitched again at the end point C of the seam B-C, and the sewing work is started. Sew up to point D.

Next, as shown in the same figure (d), the upper surface cloth A1 and the other end of the fastener F are ta-made from point D to point E,
At point E, which is the sewing end point, reverse stitching is performed, thread cutting is performed, and the zipper sewing operation is completed.

As described above, sewing a zipper is an extremely complicated operation, requires skill, and takes time to sew, resulting in extremely low sewing efficiency.

[Means for Solving the Problems] The present invention provides a zipper sewing machine that includes a control means, a moving means for feeding the workpiece in the XY force direction in accordance with stitch information output from the control means, and an upper surface. The first holding means holds the cloth and presses the lower outer fabric, and the second holding means holds the upper outer fabric when the first holding means is held and the presser operation is released. The first holding means includes a cloth contacting part located near the sewing needle, a lifting means for vertically moving the cloth contacting part, and a swinging means for swinging the cloth contacting part in a direction intersecting an edge of the upper outer fabric. The second holding means includes a cloth hook part located at an appropriate distance from the cloth contact part through the sewing needle, and the cloth hook moves the part in the vertical direction and moves the cloth hook part in the vertical direction. The above-mentioned conventional problems are solved by providing means for moving the cloth hook in a direction intersecting the edge of the upper cloth.

[Function] The zipper sewing machine according to the present invention uses the first holding means to hold the upper outer fabric and press the lower outer fabric while pressing the lower outer fabric. A first side portion where the outer fabric and the fastener overlap is sewn, and the heavy contact portion of the first holding means releases the holding operation of the upper outer fabric edge before the end of the first side portion, while the second The cloth hook part of the holding means operates to engage and hold the upper outer fabric edge, and the sewing needle is moved to the lower side at a position away from the upper outer fabric edge at the final stitch of the first side part. A final needle drop is made at the overlapping part of the outer fabric and the zipper, and a stitch is formed continuously from this final needle drop point on the lower side to stitch the zipper, lower outer fabric, and upper outer fabric. The second suture is connected to the suture on the lower side.
The zipper is sewn by forming seams on the sides and sewing the upper outer fabric and the zipper together.

[Embodiments of the invention] The present invention will be described in detail based on the drawings.

The same parts as in the conventional example are given the same reference numerals, and redundant explanation will be omitted.

1 to 8 are diagrams showing one embodiment of the present invention.

In the figure, X is a first holding means provided on the side end surface of the sewing machine head 4 near the sewing needle;
a lifting cylinder Pv as a lifting means for vertically moving the P, and a swinging cylinder Ps as a swinging means for the heavy contact portion P;
-.

The heavy contact portion P fixed to the lower end of the advancing/retracting rod of the elevating cylinder PV has an L-shape and has a presser foot PF on the lower end surface for pressing the sewing part.

The lifting cylinder Pv that moves the heavy contact part P in the vertical direction is
An inverted-shaped attachment rotatably supported on the side end surface of the sewing machine head 4 is fixed to the plate PL.

Ps is a swinging cylinder as a swinging means, one end of which is fixed to the mounting plate PL, the other end of which is fixed to the sewing machine head 4,
The mounting plate Pt is rotatable about a pivot point Pp.

Y is a second holding means provided on the lower surface of the sewing machine head 4, which is arranged to face the first holding body X with the sewing needle N sandwiched therebetween; Return board T
A moving device TP is provided as a cloth return moving means for moving the cloth.

The cloth return plate T 5 normally has a cloth contact part T that projects vertically downward, and an outer mold T that projects outward of the sewing machine head 4.
3, and an inner wind T2 protruding inwardly from the sewing machine head 4.
have.

The moving means Tp includes a moving cylinder Tc as a driving source, a support plate Ta that pivotally supports one end of the moving cylinder and supports the second holder Y on the sewing machine head 4, and a supporting plate Ta that pivotally supports the other end of the moving cylinder Tc. At the same time, a cloth return plate stand Td rotatably holds the cloth return plate T, and a guide plate that engages with the cloth return plate stand Td and has an inclined guide groove that approaches the sewing needle N as it goes downward. G, and a stopper S fixed to the support body Ta below the guide plate G. When the cloth return plate T is moved downward along the guide plate G by the movement cylinder Tc, the stopper S is The inner wind T2 of the cloth return plate T contacts the cloth return plate T, and the cloth return plate T rotates clockwise around the rotation axis.

is engaged with the inner side of the edge of the upper surface cloth A1.

Reference numeral 3 denotes a moving table as a moving means, which moves the workpiece in the XY directions in accordance with stitch information output from a control means (not shown).

Further, the stitch information from the control means is transmitted to the first holding means
and the second holding means Y at the same time, and drive and control predetermined operations for each of them.

The second holding means Y is provided with a support plate in case the stitching of the fabric of the workpiece is reversed, that is, the overlapping of the upper outer fabric AI and the lower outer fabric A2 is reversed. Ta
They are provided in a pair with .

Based on the above configuration, the operation of this embodiment will be explained with reference to FIGS. 2 to 8.

First, fix the workpiece to the fixed cassette 1 and set it on the movable table 3. When the switch is turned on to start the zipper sewing machine, the advance/retreat rod of the swing cylinder Ps moves backward, and the attachment is performed on the plate PL.
The lifting cylinder Pv fixed to the cloth contacting part P is rotated counterclockwise around the pivot point Pp of the mounting plate PL (Fig. 2), and in this state, the advancing/retracting rod of the lifting cylinder Pν moves forward. Then, the heavy contact portion P descends and brings the presser foot PP into contact with the upper surface of the lower outer fabric A2 outside the edge of the upper outer fabric AI. (3rd
(Figure) Next, the reciprocating rod of the swing cylinder Ps moves forward, and the heavy contact portion P moves clockwise around the pivot point Pp of the mounting plate PL while its presser foot Pp contacts the upper surface of the lower outer fabric A2. It rotates to turn up the upper outer fabric AI and press down the lower outer fabric A2. (Fig. 4) Next, the moving table 3 moves in the direction of the arrow Y to remove the lower outer fabric A.
Sewing between B and C (first side part) where 2 and fastener F overlap starts with reverse stitching at point B.

During this sewing operation, the heavy contact portion P prevents the sewing needle N from flapping about the object to be sewn.

The sewing of the first side part started from point B reaches 6 points,
This stitch end point C is the final part of the open portion of the upper surface fabric A1 and the lower surface cloth A2, the so-called opening stop portion, and the heavy contact portion P preceding the sewing needle N engages with this opening stop portion. In order to avoid this, it is necessary to release the engagement between the heavy contact portion P and the upper surface cloth A1.

Therefore, before the sewing end of the first side part, the advance/retreat rod of the movable cylinder Tc of the second holder Y moves forward, and the cloth return plate T is moved downward by the engaging guide plate G.
The inner wind T2 of the cloth return plate T comes into contact with the stopper 9, and the cloth return plate T rotates clockwise around the rotation axis, and the cloth contact portion T is attached to the edge of the turned-up upper surface cloth A1. ! and hold it. (Fig. 5) As a result, it becomes possible to release the upper surface cloth A1 of the first holding body Then, the heavy contact portion P is rotated counterclockwise, and the heavy contact portion P is separated from the opening stop portion.

(Fig. 6) Next, the final needle drop point between B and C (1st m section) is moved to the moving table 3.
moves in the direction of arrow X, and the final stitch FT is formed. (
(Fig. 6) In other words, this final stitch FT is 1 step from the previous stitches.
It is formed off the needle (outside the edge of the upper outer fabric covering the seam between B and C). Then, by moving the final stitch in the X direction, continuous stitching from B-C to C-D becomes possible.

When the final seam between B and C (first side part) is formed, the holding of the upper outer fabric by the second holding means Y is released, and the edge of the upper outer fabric becomes the edge of the lower outer fabric. In this state, sewing between C and D (lower side) is performed continuously from the last stitch on the first side (Figure 7).Subsequently, the movable table 3 moves in the Y direction. and upper outer fabric A
Sewing is performed between D and E (second side part), which is the overlapping part of 1 and zipper F (Fig. 8), and at point E, which is the sewing end point, reverse stitching is performed, the thread is cut, and the seam is sewn. The zipper sewing is finished.

[Effects of the Invention] As described above, according to the present invention, the first holding means;
With the upper outer fabric turned up by the second holding means,
When forming a seam on the lower outer fabric and sewing the upper outer fabric from the lower outer fabric, move the final seam to a position away from the edge of the upper outer fabric, Since it is configured to form a seam on the outer fabric, it is possible to sew a zipper with overlapping upper and lower outer fabrics in one continuous stitch.
In addition to not requiring skilled techniques, the zipper can be sewn in a short time, sewing efficiency is improved, and the zipper can be sewn quickly and at low cost.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing the configuration of an embodiment of the present invention. 2 to 8 are views showing the operating state of the present invention. FIG. 2 is a partially cutaway perspective view showing the rotational movement of the contact portion by the swing cylinder. FIG. 3 is a partially cutaway perspective view showing the lowering operation of the contact portion by the lifting cylinder. FIG. 4 is a partially cutaway perspective view showing the operation of turning up and holding down the upper surface cloth by the contact portion. FIG. 5 is a partially cutaway perspective view showing the abutting operation of the second holding means against the upper outer cloth and the moving operation of the movable base. FIG. 6 is a partially cutaway perspective view showing the operation of releasing the contact portion from the upper outer fabric by the lifting cylinder and the operation of the movable table when forming the final seam on the first side portion. FIG. 7 is a partially cutaway perspective view showing the movement of the movable table during sewing of the lower side. FIG. 8 is a partially cutaway perspective view showing the operation of the movable table during sewing of the second side part. FIG. 9 is a perspective view showing the state of engagement between the outer fabric and the lining fabric. FIG. 10 is a perspective view showing a fastener fixing device. FIG. 11 is a partially cutaway front view showing the sewing process of conventional zipper sewing. In the figure, B-C...first side C-D...lower side D-E...second side F...fastener 3...movement means X. ...First holding means Y ...Second holding means N ...Sewing needle P ...Contacting part Pv ...Elevating means P, ... ... Swinging means T. A. ... Cloth return board ... Cloth return moving means ... Upper surface cloth ... Lower surface cloth Figure 111

Claims (3)

[Claims] (1) The material to be sewn is moved in the XY direction according to the stitch information from the control means.
a first holding means for turning up the upper outer fabric and holding down the lower outer fabric; and a second holding means for holding the upper outer fabric when the first holding means is released from operation. The first step is to move the fastener and the workpiece overlapped thereon on a table, and to polymerize the lower outer fabric and the fastener while holding the upper outer fabric and pressing the lower outer fabric by the first holding means. The first side is sewn, and before the end of the first side, the second holding means engages and holds the upper outer fabric in place of the first holding means, and the last seam of the first side is sewn on the upper side. It is formed on the lower outer fabric and the zipper at a position away from the edge of the outer fabric, and continues from this final needle drop point and intersects perpendicularly to the first side part so that the upper outer fabric, the zipper, and the lower outer fabric overlap. By forming a seam on the lower side of the seam, and further forming a seam on a second side parallel to the first side, the seam between the upper outer fabric and the zipper is formed. A zipper sewing machine characterized by sewing garments continuously. (2) The first holding means includes a cloth contact portion that locks and holds the upper surface cloth located near the sewing needle, a lifting means that moves the cloth contact portion up and down, and a movement of the cloth contact portion in a direction intersecting the edge of the upper surface cloth. 2. The zipper sewing machine according to claim 1, further comprising a swinging means for swinging the sewing machine. (3) The second holding means is composed of a cloth return plate and cloth return moving means for raising and lowering the cloth return plate and rotating it in a direction to lock the edge of the upper outer fabric. The fastener sewing machine according to claim 1.