JPH0496787A - Indexer device of sewing machine - Google Patents

Abstract

PURPOSE:To use an indexer device for both longitudinal and cross button holes by axially supporting both the needle position of a sewing machine frame 1 or a corner portion of the frame near the needle position and a portion of an index frame near the center of the length of the sewing machine frame in such a manner as allowing both to rotate relatively and at right angles to each other, and locking both positions relative to each other, the index frame having an indexer mounted therein. CONSTITUTION:A bearing 19 is provided at a corner portion of a sewing machine frame 1 near the needle position of a cycle sewing machine 3 and a bearing 20 is provided near the center of the length of the machine frame 1 side portion of an index frame 2 and both bearings are made to abut against each other and a rotary shaft 21 is supported between the bearings. The rotary shaft 21 is provided in a position separate from a needle location by a distance E. The distance E must be such that when the index frame 2 is rotated through 90 degrees the distance between a needle falling on the index frame 2 and the edge of the index frame 2 is not greatly varied. The sewing machine frame 1 and the index frame 2 are set and locking devices 22 each comprising a latch 23 and a fastening body 24 are provided in two positions corresponding to the frames 1, 2 respectively.

Description

Detailed Description of the Invention A. Object of the Invention [Industrial Field of Application] The present invention provides a sewing machine that repeatedly performs sewing and cloth feeding multiple times in succession to continuously punch a plurality of holes in a cloth. The present invention relates to an indexer.

■ [Prior technology] A button-type sewing machine consists of a cycle sewing machine for holing and a presser foot conveyor that holds the fabric and feeds it intermittently to the sewing position of the sewing machine, and sewing and feeding the fabric are repeated multiple times alternately. An automatic sewing machine that attaches buttons or pierces holes to each of a plurality of sewing locations was widely known before this application was filed (Japanese Patent Publication No. 6
(See Publication No. 3-5113).

[Problem to be solved by the invention]

In particular, buttonholes for women's blouses can be made either vertically or horizontally depending on the type of the front body, but conventional automatic sewing machines are exclusively for vertical or horizontal holes, and there is no machine that can do both. For example, if the first buttonhole is a horizontal hole and the second and subsequent buttonholes are vertical holes, the first buttonhole must be sewn with an automatic horizontal sewing machine, and the second and subsequent buttonholes must be sewn with an automatic vertical sewing machine. However, it was inconvenient.

SUMMARY OF THE INVENTION An object of the present invention is to provide an indexer for a sewing machine that can be used for both vertical and horizontal button operations.

1. Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the indexer device for a sewing machine of the present invention has an indexer device that connects a corner of the sewing machine base 1 at or near the needle position of the sewing machine, and an indexer device of the present invention. The index stand 2 equipped with the sewing machine stand 4 is pivoted near the center in the longitudinal direction on the sewing machine stand l side so as to be relatively rotatable by 90 degrees, and their relative positions can be locked.

[For production]

In the sewing machine indexer device configured as described above, the sewing machine mount 1 and the index mount 2 are rotated 90 degrees relative to each other around their connecting shafts, and their relative positions after rotation are locked.

〔Example〕

A first embodiment applied to buttonhole stitching will be described with reference to FIGS. 1 to 9.

As shown in FIG. 2, which is a plan view, the indexer device of this sewing machine consists of a sewing machine base 1 on which the holing cycle sewing machine 3 is placed, and an index base 2 equipped with an indexer 4. It has become.

This invention provides an index stand 2 for a sewing machine stand 1.
The machine is characterized by rotating the machine by 90° relative to the machine.Before explaining its mechanism, we will briefly touch on the cycle sewing machine 3 for holing, and mainly refer to Fig. 1 for a brief explanation. Next, indexer 4 will be explained.

The cycle sewing machine 3 for holing has a cloth sandwiched between a presser foot 6 and a cloth feed plate (not shown) located below the presser foot 6, and the cloth presser foot 6 and cloth feed plate move below the needle 5 along the buttonhole. CD
This is a sewing machine that makes holes while moving in the direction. This sewing machine is equipped with an auxiliary clamp 7 consisting of a cylinder 9 having a piston rod with a cloth presser 8 at its tip, which works together to clamp the cloth when the cloth presser 6 presses the cloth.

The indexer 4 is mounted on the index stand 2 as described above, and consists of two fabric engaging means 10, 10 and a driving means 11 thereof.

The two fabric engagement means 10, lO are connected to the index mount 2
Two stoppers 1 fixed at intervals on the underside of the
It is attached to blocks 4 and 14 which are movably provided on two rods 13 and 13 mounted between 2.12 and 13. Furthermore, a rack plate 15 is fixed to the two blocks 14, 14.

The fabric engaging means 10 is comprised of a U-shaped fabric support 16 and a cylinder 18 having a piston rod with a fabric presser 17 at the tip. The cylinder 18 is inserted to hold the cloth by operating the cylinder 18, but while the cycle sewing machine 3 is sewing a buttonhole, the cylinder 18 is retracted to a non-operating position. Further, between each fabric engaging means 10, a sixth
As shown in the figure, the connecting body 25 is mounted on a rack, and is provided with adjustment screws 25a, 25a.

The adjustment screws 25a, 25a are adapted to engage with the elongated holes of the fabric engaging means 10, so that they can be moved and fixed in the elongated holes. When the fabric is guided into the U-shaped portion of the fabric support 16 of the fabric engagement means 10, the fabric edge is guided against the connector 25, thereby determining the distance to the needle drop position.

The drive means 11 includes a pulse motor 11a and a pinion Ilb that is attached to the drive shaft of the pulse motor 11a and meshes with the teeth of the rack plate 15. A 1-coder motor is used instead of the pulse motor 11a.
It is also possible to move the block 14.14 directly with each stroke.

Next, the operation of indexer 4 will be explained.

When the cloth engaging means 10 in the open state is at the origin position, which is the end of its stroke, the cloth presser foot 6 and the auxiliary clamp 7
etc. rises and the cloth is sent by a conveying device (not shown).
Waiting for it to be set. When the cloth is set and started, the presser foot 6 and the auxiliary clamp 7 clamp the cloth, and the cycle sewing machine 3 performs hole stitching. At this time, the cloth moves in the CD direction as the hole is stitched, but the cloth is stopped by the auxiliary clamp 7 to prevent it from shifting further. When the hole stitching is completed, the fabric engaging means 1O110
clamps the cloth, and the presser foot 6 and the auxiliary clamp 7 release the cloth. Then, the pulse motor 11a rotates in the direction of the arrow A°, moves the fabric engaging means 10 by a preset distance in the direction of the arrow via the pinion 11b and the rack plate 15, and the fabric also moves in the direction of the arrow. Transported along with the vehicle. When the cloth is conveyed, the cloth presser foot 6 and the auxiliary clamp 7 clamp the cloth, and then the cloth engaging means 10 and 1O release the cloth, and the cycle sewing machine 3 performs hole stitching. While the cycle sewing machine 3 is in operation, the pulse motor 11a is rotated in the direction of arrow B' to move only the fabric engaging means 1O in the direction of arrow B and returned to the original position, and the cycle sewing machine 3 waits for completion of hole stitching. As described above, the cloth engaging means 10.10 moves the cloth by the buttonhole pitch, the cycle sewing machine 3 makes the hole, the cloth is released, the cloth engaging means 10 returns to the original position of IO, and the hole is stitched. When the fabric is repeatedly fed one pitch at a time until the predetermined number of holes have been stitched, the fabric is sent to a stacker (not shown).
The cloth presser foot 6, the auxiliary clamp 7, and the cloth engaging means 10 all release the cloth, and the cloth engaging means 10 waits for the next cloth to be set at the original position.

This indexer 4 does not convey the clamped cloth without letting it go until the set number of holes have been stitched, as in the conventional indexer, but instead conveys it intermittently, so the space occupied by the conveyance mechanism can be reduced. It has advantages such as being able to transport cloth endlessly and reducing costs by reducing the number of component parts.

Next, set the index stand 2 at 90° with respect to the sewing machine stand l.
The mechanism for rotation will be explained.

FIG. 5 shows a connection structure between the sewing machine frame 1 and the index frame 2. As shown in FIG. Bearings 19 and 19 are provided at the corners of the sewing machine mount 1 near the needle position of the cycle sewing machine 3, and bearings 2o and 20 are provided near the longitudinal center of the index mount 2 on the sewing machine mount 1 side, and the bearings are butted against each other. and supports the rotating shaft 21 between them. This rotating shaft 21 is located at a distance E from the needle drop position as shown in FIG.
It is installed in the position where it is placed. It is not necessarily necessary to set this distance E to zero to match the needle drop position and the rotation axis 21, but when the index stand 2 is rotated 90', the needle that falls onto the index stand 2 from the edge of the index stand 2. It must be thrown at a distance that does not change significantly.

In this way, the index stand 2 is rotated 90 degrees with respect to the sewing machine stand 1, but in order not to interfere with the rotation, the index stand 2 should be close to the needle position of the sewing machine table shown by arrow F in Fig. 4. The corners are cut diagonally. Further, during the rotation, the fabric engaging means 10 moves on the upper surface of the sewing machine bed, so there is no interference with each other, and there is no other obstacle to the rotation.

Figure 5 shows the sewing machine base 1 and index base 2 set in the positional relationship shown in Figures 2 to 4. The hook is provided with a locking device 22 consisting of a buckle 23 and a tightening body 24 (FIG. 2). The hook 23 is attached to the index frame 2, the tightening body 24 is attached to the sewing machine frame 1,
Each is attached with a screw, but the reverse is also possible.

This locking device 22 will be explained with reference to FIG.

The hook 23 of the locking device 22 has a hook portion 23a whose tip is bent into a hook shape.

The tightening body 24 of the locking device 22 includes a lever 24b rotatably supported by a base plate 24a, a shaft 24c rotatably supported between the levers, and an adjusting nut 24d with one end passing through the shaft 24c. Connecting rod 2 supported so that it can move forward and backward
4e and the hook 2 fixed to the other end of the connecting rod 24e.
It is 4f.

The hook 23 of the locking device f122 and the tightening body 24 are engaged by rotating the lever 24b toward the hook 23 when the sewing machine base l and the index base 2 are rotated 90° and brought into contact with each other. This is accomplished by bringing the ring 24f close to the hook 23, hooking it onto the hook 23a, and then rotating the lever 24b to the opposite side.

The locking device 22 may be of any other type as long as it has a similar function.

In order to rotate the index stand 2 in the vertical hole stitching state of FIG. 2 by 90 degrees with respect to the sewing machine stand 1, first, turn off the power switch to cut off all output. Then, the locking device 22 on the right side of the index mount 2 is released, and the index mount 2 is rotated manually or this operation is performed by a motor or the like, and the horizontal hole is set in the state. Next, lock the lock device 22 and turn on the power switch.

FIG. 8 is a diagram corresponding to FIG. 2, and FIG. 9 is a diagram obtained by rotating the index mount 2 by 90 degrees from this diagram. The former is for vertical holes in men's dress shirts, etc., and the latter is for horizontal holes in women's blouses, etc., and the fabric engaging means IO of each is at the original position, which is the standby position. The distance between the edge of the body placket and the needle drop position in each state is set by adjusting the position of the connecting body 25 in the fabric engaging means 10 as described above.

Next, a second embodiment will be described with reference to FIGS. 10 and 11.

In this embodiment, instead of rotating the index stand 2 as in the first embodiment, it is fixed and the sewing machine stand 1 is rotated by 90 degrees depending on whether the buttonhole to be sewn is a vertical hole or a horizontal hole. In that case, it is necessary to change the installation position of the stacker to the right or left of the index mount 2 due to the difference in the conveyance direction of the body cloth. That is, in the state shown in FIG. 1O in which the sewing machine 3 is sewing a vertical hole facing in the normal direction, the stacker S is on the right side of the index stand 2, and the sewing machine 3 is
In the state shown in FIG. 11, in which the horizontal hole is cut by 0 degrees, the stacker S is on the left side of the index stand 2. Other points are similar to the first embodiment.

Effects of the Invention Since this invention is configured as explained above,
This produces the effects described below.

In other words, vertical buttonholes, horizontal buttonholes, and buttons that do not necessarily require rotation of the indexer, as well as embroidery sewing,
It can also be used for sewing hook-and-loop fasteners, etc. Therefore, it is possible to correspond to various designs.

In addition, the relative positions of the sewing machine stand L and the index stand 2 can be changed even during the sewing process, so the
Even if the button has a horizontal hole and the second and subsequent buttons have vertical holes,
The first buttonhole is properly drilled and the quality is stable.

FIG. 6 is a plan view of the fabric engaging means, FIG. 7 is a perspective view of the locking device in the locked state, and FIG. 8 is a view of rotating the index mount with respect to the fixed sewing machine mount. Diagram showing the state set for vertical hole stitching, No. 9
The figure also shows a state in which the machine is set for horizontal hole stitching, Figure 1o shows a state in which the sewing machine base is rotated with respect to a fixed index stand and is set for vertical hole stitching, and Figure 11 also shows a state in which it is set for horizontal hole stitching. It is a figure showing the set state.

l - Sewing machine stand, 2 Index stand, 3 - Cycle sewing machine, 4 Indexer-521 rotating shaft, 22
locking device

[Brief explanation of drawings]

Figure 1 is a perspective view of the part centered on the indexer, Figure 2
The figure is a plan view of the indexer device of the sewing machine of this invention, FIG. 3 is a front view, FIG. 4 is a side view, and FIG. 5 is a sewing machine stand and indexer device. 4a Figure Figure

Claims (1)

[Claims] 1. The corner of the sewing machine mount at or near the needle position of the sewing machine and the vicinity of the longitudinal center of the index mount on the sewing machine mount side of the index mount equipped with the indexer are pivoted so that they can rotate 90 degrees relative to each other. An indexer device for a sewing machine that can lock relative positions.