JPS6324716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cloth presser device for pressing a workpiece to be sewn during sewing with a sewing machine.

[Prior art]

2. Description of the Related Art A presser foot device for an automatic sewing machine is well known, which sews a workpiece according to a predetermined pattern based on preprogrammed data at a sewing position, that is, a needle position of the sewing machine.

[Summary of the invention]

The present invention is such that the lateral distance between the pair of left and right presser feet in the cloth presser device can be adjusted.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 4, an automatic sewing machine to which this presser foot device is installed includes a sewing machine mechanism part 3 that has a built-in mechanism for forming stitches on the top surface of the sewing machine table 1 with a needle 2, and an upper presser foot 4 that holds the workpiece to be sewn. and a lower presser plate 5, and a cloth presser drive unit that moves the cloth presser device 6 horizontally and horizontally on a sliding plate 7 according to a predetermined pattern. 8 is provided. A control section 9 is provided on the sleeve of the sewing machine table 1 to supervise the operations of the above-mentioned parts. The movement of the presser foot driving section 8 is controlled. The presser foot device 6 includes a base 11 that is fixed to the output end 8a of the presser foot drive mechanism 8 and is elongated in the left-right direction, and a pair of left and right upper presser feet that are attached to the front part of the base 11 so as to be movable in the left-right direction. 4, and a distance adjusting means 12 for adjusting and fixing the left-right distance between the pair of left and right upper presser feet 4. A guide groove 14 is formed on the front surface of the recessed part 13 formed on the left and right sides of the front surface of the base 11,
In these guide grooves 14, there are blocks 16 to which the base ends of the pair of left and right upper pressers 4 are fixed with screws 15, respectively.
A guide element 16a is slidably fitted therein. The distance adjusting means 12 comprises a pair of left and right threaded rods 17 suspended horizontally in the recessed portion 13 of the base 11, fixing screws 18 of these threaded rods 17, and tightening screws 19 of the block 16. The tips of the pair of left and right threaded rods 17 are formed into round rods with a smaller diameter than the threaded portion 17a,
This is rotatably fitted into the center wall 11a of the base 11 located between the recessed parts 13, and the threaded part 17
It is formed into a round bar with a diameter larger than a, and this is formed into a recessed notch 13.
It rotatably penetrates the outer wall 11b of the base 11 located on the outer side of the base 11, and a knob 17b is fixed to the end thereof. A coil spring 20 mounted on the outer periphery of a threaded rod 17 is interposed between the outer wall 11b of the base 11 and the block 16. The fixing screw 18 is screw-fitted into the center wall 11a of the base 11, and the tip of the fixing screw 18 presses and fixes a part of the outer peripheral surface of the tip of the threaded rod 17 by tightening the fixing screw 18. The pressing and fixing is released by a relaxing operation. The tightening screw 19 is inserted into a horizontally elongated hole 21 formed in the base 11 so as to communicate with the guide groove 14, and the tip of the tightening screw 19 is threadedly fitted into the guide piece 16a of the block 16. The block 16 is fixed in position to the base 11 by tightening the screw 19, and the block 16 is fixed to the base 1 by loosening the tightening screw 19.
It becomes possible to move relative to 1. A long needle hole 22 is formed in the horizontal arm 4a of the upper presser foot 4 in the front-rear direction.

In the configuration of the above-described embodiment, the workpiece is positioned and placed between the upper presser foot 4 and the lower presser plate 5, and the presser foot drive unit 8 is turned on, and the upper presser foot 4 and the lower presser plate The sewing machine mechanism 3 is driven to sew by the controller 9, and the presser foot device 6 is moved in the left-right direction according to pre-programmed data. As a result of this movement, the portion of the upper presser foot 4 of the workpiece located within the needle hole 22 is sewn from one side of the workpiece to the other in sequence. That is, after the part of the upper presser foot 4 inside the needle hole 22 is first sewn, the presser foot drive unit 8 moves in the left and right direction in response to a signal from the control unit 9, and then the part of the upper presser foot 4 inside the needle hole 22 is sewn. 4 needle hole 2
2 is moved and placed directly under the needle 2 and sewn.

By the way, when the type of workpiece changes and the left and right spacing of the upper presser foot 4 is changed, the fixing screw 18
After loosening the tightening screw 19, turn the knob 17b.
Rotate to move the left and right upper presser feet 4 laterally,
The left-right distance is adjusted to the distance between the set left and right seam allowances of the workpiece, and by tightening the fixing screw 18 and the tightening screw 19, the left-right distance of the upper presser foot 4 is changed and adjusted. At this time, a biasing force is applied to the block 16 in a certain direction by the spring 20 to prevent the block 16 from rattling from side to side with respect to the threaded rod 17, so that the left and right spacing of the upper presser foot 4 can be set accurately. Can be done.

In addition, although the above-mentioned embodiment illustrated an automatic sewing machine that sews in a predetermined pattern based on pre-programmed data, the present invention is not limited to this, and the needle mechanism and rotary hook mechanism of the sewing machine mechanism are arranged on the left and right sides. It can also be applied to sewing machines with a swinging structure that allows width adjustment.

〔Effect of the invention〕

As described above, according to the present invention, the presser foot can be operated with accurate left-right spacing by simply adjusting the left-right spacing of the upper presser foot without replacing the presser device for each type of workpiece. It is possible to shorten the setup time and finely adjust the left and right spacing, thereby improving the efficiency of sewing work.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a perspective view showing the main parts, and Figure 3 is the same as Figure 2.
The cross-sectional view corresponding to the line, Fig. 4, is the - of Fig. 2.
FIG. 4... Upper presser foot, 5... Lower presser plate, 6... Cloth presser device, 11... Base, 12... Interval adjustment means.

Claims (1)

[Claims] 1 comprises a presser foot drive section 8 that is movable in the left and right directions on the surface of the sewing machine table 1, and a presser foot device 6 that is integrated with the presser foot drive section 8; a lower presser plate 5 for holding the lower surface of the object to be sewn; a pair of left and right upper presser feet 4 which press the upper surface of the object to be sewn and hold the object to be sewn between the lower presser plates 5 and each have a needle hole 22; 4, and a distance adjusting means for movably fixing the left and right distance between the pair of left and right upper presser feet 4.