JPS63115589A - Sewing needle machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a split-stitch sewing machine for making 81 side seams of slacks, jackets, etc., for example.

(Prior art) As a conventional split-stitch sewing machine, for example,
127853 has already been proposed.

As shown in FIG. 11, this device sews the upper fabric 1 and the lower fabric 2 (that is, side stitches) together with the sewing operation, and then stitches the seam allowance 1a of both fabrics 1 and 2. Fold it back so that 2a is open, and then fold 3 along the fold line.
By adding , it is possible to sew the side seams.

However, in this conventional device, as shown in FIG. 12, the side-stitched seam allowances 1a, 2a are divided by the lower plate 70, and the seam allowances 1a, 2a are separated by the upper and lower guide members 71.
72 so that they are turned back in opposite directions. The guide members 71 and 72 can adjust the distance between the guide surfaces 71a and 72a to correspond to the type and thickness of the fabrics 1 and 2 by screwing in or out the adjustment screw 73 provided on the upper guide member 71. It was adjusted to do so.

(Problems to be Solved by the Invention) In the conventional device described above, the upper guide member 7 is
There was a problem in that it was necessary to adjust the elevation of 1, which required complicated adjustment work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems in the conventional technology, and to enable the guide member of the seam allowance to move up and down in conjunction with the type and thickness of the fabric to be sewn.
To provide a split sewing machine capable of eliminating complicated adjustment work conventionally required.

(Means for Solving the Problems) The present invention is intended to solve the problems in the conventional techniques described above. and a cloth splitting member that guides the seam allowances of the sewn two stitches in opposite directions as the stitching moves; and a cloth splitting member that is provided on the throat plate and folds back the seam allowances of the lower fabric guided by the cloth splitting member. a lower cloth folding member for guiding; an upper cloth folding member provided on the presser foot of the sewing machine body and folding and guiding the seam allowance of the upper fabric guided by the cloth splitting member; attached to the sewing machine body; The gist of the configuration also includes a heating means for heating the seam allowance portion folded in opposite directions by the lower cloth folding member and the upper cloth folding member along the folding line.

(Function) According to the above-described means, immediately after the upper fabric and the lower fabric are sewn together by the operation of the sewing machine, the seam allowances of both sides are moved in opposite directions by the cloth dividing plate and both folding members as the stitching moves. Immediately after the folding, a crease is applied by the ironing effect of the heating means along the folding line.

Further, the upper cloth folding member is raised and lowered in conjunction with the lifting and lowering operations of the presser foot, which is raised and lowered sequentially in accordance with the thickness of the cloth to be sewn, thereby properly folding and guiding the seam allowance portion of the upper cloth.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

The explanation is shown in Figure 1, which shows a perspective view of the main parts of the split sewing machine, Figure 2, which shows a side view of the main parts with the front end of the bed of the sewing machine partially cut away, and Figure 2, which shows the main parts of the sewing machine in a side view. The process will proceed based on FIG. 3, which shows a plan view of the vicinity of the throat plate, and FIGS. 4 to 7, which show various cross sections of FIG. 3.

The split sewing machine includes a sewing machine main body 6, a guiding means 7 provided around the throat plate 10 and presser foot 11 of the sewing machine main body 6, and an ultrasonic generator 8 provided at the tip of an arm 12 of the sewing machine main body 6. It consists of

The sewing machine main body 6 is a linear lockstitch sewing machine, and the upper cloth 1 and the lower cloth 2 are sewn together in a straight line.

The presser foot 11 attached to the lower end of the presser bar 14 is attached to the seam allowance 1a of both sides 1 and 2 by the guiding means 7, which will be described later.
A dedicated device is used to assist the guidance of 2a. That is, the throat plate 10 has a needle hole 17 through which the sewing needle 16 moves up and down;
a groove 19 on the left side of the needle hole 17 in which a pair of left and right teeth 18a of a feed dog 18 on a feed table 18A that performs a feed movement by a feed mechanism (not shown) of the sewing machine main body 6 appears;
It has an opening 20 that continues rearward from the groove 19, and a cutout recess 21 that is formed on the right side of the needle hole 17 and whose rear part is continuous with the opening 20.

Further, the presser foot 11 is attached to the lower end of the presser bar 14 with a presser clamping screw 22, and has a cloth presser portion 23 at its lower end. The cloth presser part 23 has a semicircular needle groove 24 on its right side in which the sewing needle 16 is accommodated, and its lower surface is arranged opposite to the groove part 19 of the throat plate 10. A presser tongue piece 25 is protruded rearward from the right rear end portion of the cloth presser portion 23. Further, on the lower right side of the presser foot 11, a cutout surface 26 having a substantially circular arc shape is formed.

Next, the guiding means 7 will be explained in detail. The guiding means 7 is for guiding the seam allowances 1a and 2a of both the cloths 1.2 immediately after being sewn by the sewing machine main body 6 in a folded manner in opposite directions one after another as the sewing moves. It is roughly divided into a lower cloth folding member 7B and an upper cloth folding member 7C.

The cloth splitting member 7A is formed in the shape of a diagonal plate, is attached to the upper surface of the right rear portion of the throat plate 10 with a mounting screw 27, protrudes forward from the left end thereof, and is attached to the cloth of the presser foot 11. It has a cloth dividing part 28 adjacent to the right side of the presser part 23 and the presser tongue piece 25. The front end portion of the split cloth portion 28 is formed horizontally so that the thickness thereof decreases toward the tip. The cloth dividing portion 28 of this cloth dividing member 7A is connected to the sewing machine main body 6.
With the movement of the fabric fed out in conjunction with the stitching by the feeding mechanism (this movement is referred to as stitching movement of the fabric),
It relatively intervenes between the seam allowances 1'a, 2a of both the sewn fabrics 1, 2, and moves the seam allowances 1a, 2a in opposite directions, that is, the seam allowance 1a of the upper fabric 1 is directed upward, and , the seam allowance 1b of the lower fabric 2 is guided downward (see Figures 8 and 9).
(see figure). Note that the protruding pin 30 on the throat plate 10 is inserted into the horizontally elongated hole 29 of the cloth splitting member 7A.

Further, the lower cloth folding member 7B is integrally formed on the lower surface of the cloth dividing portion 28 of the cloth dividing member 7A. The lower cloth folding member 7B has a substantially rectangular plate shape, a support portion 7B1 at the left end thereof protrudes to the left, and a chamfered guide slope 31 at the left end yi. Lower cloth folding member 7
The guide slope 31 B folds back and guides the seam allowance 2a of the lower cloth 2 guided by the cloth dividing member 7Δ (see FIG. 9). That is, the seam allowance 2a of the lower cloth 2 hugged by the upper cloth 1 is first bent downward by the action of the guide slope 31, and then guided to the upper surface of the support portion 7B1 while being folded back. In order to facilitate folding of the seam allowance 2a of the lower cloth 2, it is desirable to chamfer the front edge of the lower cloth folding member 7B and the guide slope 31.

Further, the upper cloth folding member 7G is made by bending a wire material, and its upper end bent into a substantially inverted U shape is attached to the upper left side surface of the presser foot 11 together with the presser clamp screw 22. It is attached by mounting screws 32. Upper cloth folding member 7
The lower part of C extends obliquely to the lower right and to the front while bypassing the rear of the cutout surface 26 of the presser foot 11, and its tip is attached to the upper surface of the cloth splitting member 7A using its own elasticity. The guide portion 33 is brought into contact with the guide portion 33. The guide portion 33 of the upper cloth folding member 7C is configured to fold back and guide the seam allowance portion 1a of the upper cloth 1 guided by the cloth splitting member 7A.
(see figure).

Next, the ultrasonic generator 8, which corresponds to heating means, will be described. The ultrasonic generator 8 is connected to both navigation folding members 7B, 7.
Seam allowance portion 1a folded back by G.

The device 8 is used to form a fold 3 along the fold line of the sewing machine 2a, and the container 34 of the device 8 is supported at the tip of the arm 12 of the sewing machine main body 6 via a support device 9, which will be described later. As is well known, the ultrasonic generator 8 includes a high-frequency oscillator that generates vibrations, a co-imaging magnetostrictive sensor that converts the vibrations into ultrasonic vibrations, and a magnetostrictive sensor that transmits the ultrasonic vibrations and adjusts the imaging width. and an output horn 8A that increases the output power. In addition,
A high frequency oscillator, a vibrator, etc. are built into each body 34, and an output bone 8A projects from below the body 34.

Next, regarding the support device 9 of the ultrasonic generator 8, the tenth
This will be explained with reference to the figure.

It is attached to the back side of the tip of the 7-m 12 of the sewing machine body 6 via the mounting bracket 36. A lifting cylinder 38 consisting of an installed air cylinder and a guide shaft provided vertically on the support 37 by screwing the threaded portion 41 of the knob 40 at the lower end into the lower piece of the support 37 42, and a telescoping rod 39 that is movably provided on the guide @ 42 and protrudes below the lifting cylinder 38.
and a shaft 44 on the side of the lifting table 43.
The holder 45 is rotatably supported through the holder 45 and holds the container 34 of the ultrasonic 5t main device 8, and @4 of the holder 45
The same holder 4 is inserted through the arc-shaped opening hole 46 centered at 4.
5 to the lifting table 43; and a spring 48 wound around the guide shaft 42 and interposed between the end surface of the threaded part 41 of the knob part 40 and the lower surface of the lifting table 43. Consists of. Therefore, the body 34 of the ultrasonic generator 8 is raised and lowered together with the lifting table 43 by the expansion and contraction of the lifting cylinder 38, and the mounting angle of the body 34 is adjusted by once loosening the fixing screw 47. Adjustment is made as appropriate by rotating the holder 45 via the screw 44 and tightening the fixing screw 47 again. Note that a projecting piece 43a that slides along the longitudinal hole 37a of the support body 37 is provided on the lifting table 43 in a protruding manner.

Thus, the lower end (tip) of the output horn 8A of the ultrasonic generator 8 is placed at a position adjacent to the rear of the feed dog 18, and the folded portion 1 of the cloths 1 and 2 to be sewn and moved.
a, press 2a. Further, on the feed base 18A of the feed dog 18, an anvil 49 corresponding to the output horn 8A is installed adjacent to the rear of the feed dog 18. This anvil 49 is connected to the folded portions 1a and 2a of the cloth 1.2 between the tip of the output horn 8A and the feed dog 18 when the cloth is fed.
(see Figure 7). Note that the tip of the output horn 8△ is formed in an inverted shape, and the tip of the output horn 8
, 2 along the folded portions of the folded portions 1a and 2a. On the other hand, the anvil 49 is formed in an L-shape corresponding to the shape of the tip of the output horn 8A. With this image shape, the entire folding group of the edge portions 1a and 2a of the cloths 1 and 2 is processed uniformly.

The operation of sewing the side seam portion of cloth using the split seam sewing machine described above will be explained.

When the sewing machine main body 6 is operated (activated) and sewing is progressed while overlapping the side seams of the upper fabric 1 and the lower fabric 2, first, as is well known, the upper fabric 1 and the lower fabric 2 are The lower cloth 2 is sewn together.At the same time, the lifting cylinder 3
8 lowers the ultrasonic generator 8, and its vibrator starts oscillating.

Before and after the stitching of both cloths 1 and 2, the cloth splitting member 7A
The seam allowance 1 of the upper fabric 1 and the lower fabric 2 is
a, 2a are guided and gradually divided in the vertical direction (opposite Ig direction) (see Figure 5.8.9).

Thereafter, while the sewing lines of both fabrics 1 and 2 are being pressed by the presser tongue piece 25 of the presser foot 11, as both fabrics 1°2 are sewn and moved, the stitching lines shown in FIGS. 6 and 8 are moved. As shown in FIG.
3 and then folded back along the presser tongue piece 25. At this time, the seam allowance portion 1a passes between the guide portion 33 of the upper cloth folding member 7C and the cutout surface 26 of the presser foot 11.

At the same time, the seam allowance 2a of the lower cloth 2 is first bent downward by the guide slope 31 of the lower cloth folding member 7B, and then supported by the subsequent action of the guiding slope 31 of the lower cloth folding member 7B. Part 7B1 and cloth dividing part 2 of cloth dividing member 7A
It is folded back 180 degrees between the sides of 8 and 8. This folding is performed along the seam line located below the presser tongue piece 25 (see FIG. 9). The folded portions of the seam allowances 1a and 2a of both fabrics 1.2 folded back in this manner are guided along the presser tongue piece 25 to the tip of the output horn 8A. As shown in FIG. 2, the tip of the output horn 8A is inclined upward to the right, so that the folded portions of the seam allowances 1a and 2a can easily connect the tip of the output horn 8A and the anvil 49. It is possible to get in between.

At this time, the upper cloth folding member 7C is raised and lowered in conjunction with the raising and lowering operation of the presser foot 11, which is raised and lowered sequentially in accordance with the thickness of the cloth 1.2. Appropriate return guidance will be provided in sequence. Therefore, side stitching can be performed rationally without requiring complicated lifting and lowering adjustment work for the conventional guide member.

In this example, the tip (lower end) of the upper cloth folding member 7C is brought into contact with the upper surface of the cloth splitting member 7A by utilizing its own elasticity, so that when the presser foot 11 is lowered, the upper surface of the throat plate 10 The inclination angle of the guide part 33 of the upper cloth folding member 7C is small, and on the contrary, the inclination angle of the guide part 33 becomes large when it reaches the upper limit. , a good guiding effect is imparted to the seam allowance portion 1a of the upper fabric 1.

Immediately after that, as shown in FIG. 7, the tip of the output horn 8A of the ultrasonic generator 8 comes into contact with the folding line of both cloths 1 and 2, and the feeding movement of the feed table 18A causes
When the anvil 49 is pressed against the tip of the output horn 8A with the cloths 1 and 2 interposed, the ultrasonic vibration generated by the ultrasonic generator 8 is generated along the fold line of the cloths 1 and 2. As a result, the cloth itself in the contact area of the output horn 8A generates heat, and the folds 3 are created in the cloths 1 and 2 by the ironing effect of the heat.

The cloth 1 due to the application of ultrasonic 'S' motion of this ultrasonic generator 8
, 2 only when the cloths 1 and 2 are sandwiched between the output horn 8Δ and the anvil 49.
Because it occurs in itself, unlike the conventional electric heating element,
It is possible to achieve instantaneous heating and instantaneous heat extinction, and
The heat a can also be easily controlled by changing the number of strokes.

After the side line parts of fabrics 1 and 2 are sewn in this way,
Both cloths 1 and 2 are sent out rearward while being sewn.

In the above embodiment, the anvil 49 is provided on the feed base 18A, but the anvil 49 may also be provided on the throat plate 10.

In addition to the ultrasonic generator 8 of the embodiment, the heating means includes
It is also possible to employ heating means using an electric heating element.

(Effects of the Invention) In other words, according to the present invention, immediately after the upper fabric and the lower fabric are sewn together by the operation of the sewing machine, the seam allowances of both fabrics are moved by the fabric dividing plate and the folding members. Accordingly, the fabric is guided in a folded manner in opposite directions one after another, and immediately after the folding, a crease is imparted along the folding line by the ironing effect of the heating means, whereby the side-lined portion is sewn efficiently.

Further, the upper cloth folding member is raised and lowered in conjunction with the lifting and lowering operations of the presser foot, which is raised and lowered sequentially in accordance with the thickness of the cloth to be sewn, thereby properly folding and guiding the seam allowance of the upper cloth. From the vine, the complicated adjustment work that was conventionally required can be eliminated for the first time, and side stitching can be carried out rationally.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view of the main parts of a split-stitch sewing machine, FIG. 2 is a partially cutaway side view of the bed end of the sewing machine, and FIG. A plan view of the surrounding area of the throat plate, FIG. 4 is a sectional view taken along the line TV-rV in FIG. 3,
Figure 5 is a sectional view taken along line V-v in Figure 3, and Figure 6 is a cross-sectional view taken along line V-V in Figure 3.
1-Vl line sectional view, Figure 7 is a ■-Vl line sectional view of Figure 3, Figure 8 is a perspective view of the road body showing the gi-made state of the cloth using the split sewing machine, and Figure 9 is the folding of the lower cloth. A perspective view of the road body showing the state, FIG. 10 is a partially cutaway side view of the ultrasonic generator without showing the support part, FIG. 11 is a perspective view of the cloth to be side sewn, and FIG. 12 is an explanation of the conventional device. FIG. 1... Upper fabric 1a... Seam allowance 2... Lower fabric 2a... Seam allowance 6... Sewing machine body 7A... Cloth dividing member 7B... Lower fabric folding member 7C... Upper Cloth folding member 8...Ultrasonic generator (heating means) 10...Throat plate Applicant Agent Brother Industries, Ltd. Attorney Patent attorney Hidehiko Okada (3 others) 1... Upper cloth 18... Seam allowance 2...Lower fabric 2a...Seam allowance 6...Sewing machine body 7A...A5

Claims (1)

[Claims] Sewing machine body (6) for sewing upper fabric (1) and lower fabric (2)
and guiding the seam allowances (1a, 2a) of both fabrics (1, 2), which are provided on the throat plate (10) of the main body (6) and sewn together, in opposite directions as the stitching moves. Cloth splitting member (7A
), provided on the throat plate (10) and connected to the cloth splitting member (7);
A lower cloth folding member (7B) for folding back and guiding the seam allowance portion (2a) of the lower cloth (2) guided at step A); Top fabric (2) guided by cloth splitting member (7A)
an upper fabric folding member (7C) that folds back and guides the seam allowance portions (1a, 2a) of A split seam sewing machine comprising a heating means (8) for heating a folded seam allowance (2a) along a fold line.