JPS618087A - Cloth presser of sewing machine - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION C. Technical Field of the Invention The present invention relates to a cloth presser device that presses down a workpiece 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, the automatic sewing machine to which this presser foot device is attached consists of a sewing machine mechanism section 3 that has a built-in mechanism for forming stitches with a needle 2 on the upper surface of the sewing machine table, and an upper presser foot 4 that holds the workpiece to be sewn. and an upper presser plate 5, and a cloth presser drive unit 8 that moves the cloth presser device 6 two-dimensionally according to a predetermined pattern on a sliding plate 7.
and 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 horizontally elongated base 11 fixed to the output end 8a of the presser foot drive mechanism 8, and a pair of left and right upper pressers 4 mounted on the front part of the base 11 so as to be horizontally movable. 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,
Into these guide grooves 14 are guide elements 1 of a block 16 to which the base ends of the pair of left and right upper pressers 4 are fixed with screws 15, respectively.
6a is slidably fitted. The above-mentioned interval adjustment means 12
consists of a pair of left and right threaded rods 17 suspended horizontally in the recessed part 13 of the base 11, fixing screws 18 of these threaded rods 17, and tightening screws 19 of the block 16. The ends of the pair of left and right threaded rods 17 are formed into round rods with a smaller diameter than the barbed portions 17a, and are connected to the central wall 1 of the base 11 located between the recessed portions 13.
1a, is formed into a round bar with a larger diameter than the threaded part 17a, and is rotatably penetrated through the outer wall 11b of the base 11 located outside the recessed part 13, A knob 17b is fixed to the terminal. 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 threadedly fitted into the center wall 11a of the base 11 1, 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 8,
The pressing fixation is released by loosening the fixing screw 18. The tightening screw 19 is inserted into a horizontally long hole 21 formed in the base 11 so as to communicate with the guide groove 14.
The tip of the tightening screw 19 is threadedly fitted into the guide element 16a of the block 16, and when the tightening screw 19 is tightened, the block 16 is fixed in position on the base 11, and the tightening screw 19 is tightened.
By the loosening operation 9, the rib block 16 becomes movable relative to the base 11.The horizontal arm 4a of the upper presser foot 4 has an elongated needle passage hole 22 formed in the front-rear direction.

In the configuration of the above-mentioned embodiment, the workpiece is positioned and placed between the upper presser foot 4 and the upper presser plate 5, and the presser foot drive unit 8 is turned on, and the upper presser foot 4 and the upper presser plate By pressing and holding the object to be sewn between the two and starting the control section 9, the control section 9 controls the sewing machine mechanism section 3 to sew, and the presser foot device 6 according to pre-programmed data.
As a result of this movement in the horizontal direction, the portion of the workpiece located within the needle hole 22 of the upper presser foot 4 is sewn from one side of the workpiece to the other in sequence. In other words, one needle hole 2 of the upper presser foot 4
After the part inside 2 is sewn first, the presser foot drive section 8 moves laterally in response to a signal from the control section 9, and the needle passage hole 22 of the other upper presser foot 4 is moved and placed directly below 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 and the tightening screw 1
9, then rotate the knob 17b to move the left and right upper presser feet 4 laterally, adjust the left and right spacing to the distance between the left and right seam allowances of the workpiece, and then fix the above-mentioned By tightening the screw 18 and the tightening screw 19, the left and right spacing of the upper presser foot 4 can be 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 wobbling 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. I can do it.

Although the above-mentioned embodiments have been described with reference to 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 hook mechanism of the sewing machine mechanism may be connected to each other. It can also be applied to sewing machines that have a structure that allows the width to be adjusted from side to side.

〔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 an embodiment of the present invention, FIG. 2 is a perspective view showing the main parts, FIG. 3 is a sectional view corresponding to the line ■-■ in FIG. 2, and FIG. FIG. 2 is a sectional view taken along the line IV-TV in FIG. 2; 4... Upper presser foot, 5... Upper presser plate, 6... Cloth presser device, 11... Base, 12... Interval adjustment means. Agent Masuo Oiwa (and 2 others) Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A base disposed near the sewing position of the sewing machine, a pair of left and right presser feet mounted on the base so as to be movable laterally, and an interval adjustment means for movably fixing the left-right distance between the pair of left and right presser feet. A sewing machine presser foot device consisting of.