JPS623108Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a press clamping device for sewing cloth that is installed in the sewing area of an electronic pattern stitch bar tack sewing machine.

Conventionally, there has been a clamping device of this type as shown in FIG. In the figure, 1 is a work holder, 2 is a presser guide plate 3 attached to this work holder 1.
A presser foot guide attached with four set screws 4 slidably accommodates a presser foot mount 8 having a notch 7 that engages with the tip 6 of the presser spring 5.
The presser foot mounting base 8 has a parts holder 9 that fits a specific bar-tacking pattern, and an integrated presser foot 10 that holds two parts.
It is attached by a real set screw 11.
Normally, this presser foot 10 is attached to the feed plate 12 when the sewing machine is stopped.
It is in a position that maintains a certain vertical clearance.

Next, the operation will be explained. Select the sewing fabric (cloth) from among the various pattern tacking processes using the pattern selection dial (not shown), for example, as shown in the left diagram of Figure 1.
If we set the process of sewing the patch pen 14 on P 13, we would normally use a pulse motor as the drive source, and P
- The work holder 1 and the feed plate 12, each of which has one end attached to the base of the feed device (not shown) of the sewing machine, operate according to signals such as stitch length and sewing shape inputted into the ROM. In the sewing area, feeding motion can be freely applied in the X-Y directions. In other words, it operates in the same way as the circular shape of this wax pen. Normally, when the sewing machine is stopped, a certain gap is maintained between the presser foot 10 and the feed plate 12 due to the engagement between the tip end 6 of the presser spring 5 and the cutout portion 7 of the presser foot mounting base 8. When sewing, use sewing fabric 1
3 into this gap, when a foot pedal (not shown) is operated, a solenoid (not shown) which operates the push spring 5 in conjunction with the foot pedal is activated, and the push spring 5 is activated. Press down.

At this time, the tip 6 of the presser spring 5 simultaneously presses the cutout part 7 of the presser foot mount 8 downward, and due to this action, the presser foot 10 attached to the presser foot mount 8 with the set screw 11 It is pressed downward, and the sewing material 13 is held under pressure. Next, the presser foot 10 is integrated with a parts holder 9 that is processed to match the pattern bar tacking stitches to be sewn in advance, and after this presser foot 10 presses and holds the sewing fabric 13, the sewing pen 14 is placed in the parts holder. 9 and actuates the sewing machine start switch (not shown), the sewing material 13 is pressed and held by the presser foot 10 and the feed plate 12, and the sewing machine starts from the P-ROM.
The stitch pen 14 is sewn in accordance with the X-Y feeding movement of the work holder 1 and the feed plate 12 in accordance with the feed signal that forms the stitches of the stitch pen 14 inputted to the needle 15. It will be done. Originally, the greatest advantage of this type of sewing machine is that it can perform bartack stitching in a wide variety of patterns by simply operating the selection dial, but the operation of the work holder 1 and feed plate 12 in the sewing area is , in synchronization with the feed signal input to the P-ROM, can be freely moved in the X-Y direction within the feed movement limited by the mechanism of the sewing machine, but in actual sewing, the sewing Depending on the type and application of the product, it is necessary to replace the parts holder 11 integrated with the presser foot 10 that is compatible with the pattern bar tacking in connection with each pattern bar tacking. Therefore, for example, as shown in Fig. 2, if you want to sew another Watsupen different from the Sui-en Watsupen described above, the movement of the sewing machine can be changed by simply operating the sewing pattern selection dial. , the parts holder 9 needs to be replaced with one of a different shape. In this case, it is necessary to remove the set screw 11 of the presser foot mounting base 8 and replace it with another presser foot 16 that integrates the presser foot 10 and parts holder 9, or to leave the presser foot 10 as is and change only the parts holder 9 to be converted. be.

Since the conventional clamp device is constructed as described above, especially when changing the pattern bar tacking by switching the pattern selection dial,
Replacing the parts holder 9 is complicated, and replacing the presser foot 10 requires removing the set screw 11 of the presser foot mounting base 8. This is because the feed motion of this type of sewing machine is normally determined in advance with the starting point position. In connection with this, when reattaching a new presser foot (for example, presser foot 16), extremely high positioning accuracy is required, and it takes time and effort to prepare the sewing machine for pattern change sewing. There were some shortcomings.

This invention was made in order to eliminate the above-mentioned drawbacks, and the presser foot attached to this presser foot mount has two parts: a support part on the drive side attached to the presser foot mount, and a pressing part that presses the sewing fabric supported by this part. The part that presses the sewing fabric is removably attached to the presser foot support part, and a parts holder is attached to the sewing fabric pressing part to reduce the number of replacements required during actual sewing. It is an object of the present invention to provide a clamp device which, by providing this part, can easily adapt to actual sewing according to the switching of the selection dial when changing the interlocking stitch within the pattern.

An embodiment of this invention will be described below with reference to the drawings. In FIG. 3, reference numeral 17 denotes a presser foot support plate that is attached to the presser foot mounting base 8 on the drive side with a set screw 11, and a guide pin 18 is attached to the right end of the presser foot support plate 17 with a nut 19. It is installed perpendicular to the front end surface of the Further, the left end of the presser support plate 17 has two holes 20, and a stopper 21 is attached to the lower surface of the presser support plate 17.
It forms the fastening part of the two set screws 22 that fix the screws. Reference numeral 23 denotes a parts holder that is compatible with the changed pattern bar tacking, and is integrated with the separate pressing section 24. Separate pressing part 24
By guiding its guide hole 25 to the guide pin 18 attached to the presser foot support plate 17, it becomes integral with the presser foot support plate 17 in a state where it can slide back and forth, and its left end rotates downward. The presser foot 10 is constructed like a conventional presser foot 10 by connecting it with a stopper 21 for preventing the presser foot 10 from turning over, and in this state, fastening the fly nut screw 26 and the set screw 27.

Next, to explain the operation of this invention, when changing the bar tack stitch within a particular pattern to another pattern bar tack stitch, after switching the pattern selection dial, from the set state shown in Fig. 4, press the chiyo nut screw 26. , remove the set screw 27, and press the separate pressing part 2.
4 from the integrated state with the support plate 17, and then press and support a separate separate pressing part 24 that is compatible with the desired pattern bar tacking, for example, already integrated with the parts holder 23. Using the guide pin 18 attached to the plate 17 as a guide, the separate pressing part 24 is attached to the presser support plate 1.
7, and until the bottom surface of the left rear end of the separate presser foot 24 engages with the top surface of the stopper 21, and then tighten the nut 26 and set screw 27 again to press the separates. The part 24 and the presser foot support plate 17 are integrated, and it becomes possible to actually sew the next desired bar tacking pattern newly instructed by the pattern selection dial.

In the above embodiment, the presser foot support plate 17 was attached to the presser foot mount 8 with two set screws 11, but the shape of the presser foot mount 8 was changed and the presser foot support plate 17 and the stopper 21 were integrated as a whole. The same process can be applied to the presser foot mount 8 by machining it.

As described above, according to this invention, when actual sewing is scheduled in advance and multiple types of pattern sewing are performed using one pattern sewing machine, a plurality of parts holders 23 that are compatible with the pattern bar tacking can be used. By preparing the same plurality of separate pressing parts 24 that integrally attach the part holder and the parts holder, it is possible to immediately respond to changes in the pattern selection dial, etc., and quickly and accurately start the bar tacking of the next desired pattern. It is possible to convert the sewing machine, which is effective in saving labor at the actual sewing site.
This is a significant improvement in terms of efficiency.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a perspective view showing a pressing part thereof, Fig. 3 is an exploded perspective view showing an embodiment of this invention, and Fig. 4 is an exploded perspective view showing an embodiment of this invention. FIG. In the figure, 17 is a presser support plate, 18 is a guide pin, 21 is a stopper, 24 is a separate pressing portion, and 8 is a presser mounting base.

Claims (1)

[Scope of utility model registration request] Various pattern sewing processes are stored in advance in the memory element, and by moving the cloth presser foot and cloth feed plate that clamp the cloth from above according to the patterns, a specific bar tacking pattern can be created as appropriate depending on the type of sewing product. In a pattern stitch sewing machine that performs sewing, the presser foot is divided into a presser foot support section attached to the drive side and a cloth pressing section supported by the presser foot support section, and the presser foot support section has a part that protrudes from the presser foot support section in the horizontal direction. A guide pin and a stopper are attached, while a hole that fits and guides the guide pin is formed in the cloth pressing part and a fixing surface that comes into contact with the stopper, and the cloth pressing part is fixed to the presser foot support part by the guide pin and the stopper. A presser foot clamp device for a pattern stitch sewing machine, in which a cloth pressing part is detachably attached to a support part at a predetermined position by providing a screw for fixing the two when set in position.