JPS6243704B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a tatami width cutting device for a tatami surface edge sewing machine that is capable of automatically cutting the edge of a tatami floor and simultaneously sewing and cutting the tatami surface width. be.

<Prior art> The tatami facing width cutting device in the conventional tatami edge sewing machine does not have a convenient device that can automatically cut the edge of the tatami bed and can simultaneously sew and cut the facing width. Since the cutting blade (tatami surface cutting blade) was attached to the main body, fine adjustment was required depending on the thickness of the tatami floor when cutting.

<Problems to be Solved by the Invention> The present invention improves the conventional method of finely adjusting the tatami surface cutting blade each time the thickness of the tatami floor changes, and further improves the cutting and sewing of the tatami surface width. The purpose is to simultaneously cut the floor at an angle using the same device.

<Means for Solving the Problems> Therefore, in the present invention, the flat stitch presser 5 in the tatami face width cutting device attached to the flat stitch sewing machine for tatami edge is placed in front of the tatami floor cutting blade 7 in the direction of movement, and , is attached to the sewing machine main body 2 so as to be movable up and down at almost the same slope as the installation slope of the blade, and the tatami face cutting blade 11 is placed on the lower surface of the flat stitch presser foot 5, preferably in front of the position of the sewing needle 3 in the direction of movement. The structure is such that it is mounted so that it is substantially in the same plane as the advancing plane of the floor cutting blade 7. In addition to the above-mentioned structure, by providing a rotating receiving blade 9 that can rise forward of the hook 4 of the sewing machine, it is possible to stably cut the tatami floor.

<Function> With such a structure, fine adjustment of the tatami facing cutting blade is not required, and furthermore, the cutting and sewing of the tatami facing width and the slant cutting of the tatami floor can be performed by the same device.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a front view showing a tatami face width cutting device of a tatami edge sewing machine, and FIG. 2 is an enlarged side view of the same device.

The tatami edge sewing machine has a sewing machine main body 2 that can move forward and backward on a rail 1, a sewing needle 3, a hook portion 4, and a flat stitch presser foot 5, and in addition to these, a tatami face width cutting device 6 is provided. There is. When cutting the edge of the tatami floor, it is necessary to cut the edge of the tatami floor at an angle of 3 to 10 degrees (usually 4 to 6 degrees).
It is best to cut the tatami to the specified width with the front side slightly protruding. Therefore, as shown in FIG. 2, the tatami floor cutting blade 7 is provided with the mounting slope a inclined by 5 degrees. This tatami floor cutting blade 7 has a substantially triangular blade that is pivoted so that it can move back and forth (oscillate) at high speed, and cuts the tatami floor 8 as the sewing machine main body 2 moves while moving slightly by a drive source (not shown). . When cutting the tatami floor, special care must be taken when cutting the corner of the back end of the tatami mat just before the cutting is finished. This part is twisted by the weight of the cut edge of the tatami mat, making it difficult to cut it properly. Therefore, in this device, a pick-up blade 9 is provided so as to be able to rise further forward in the cutting direction than the hook portion 4 of the sewing machine which is forward of the cutting blade 7. When the cutting of the tatami floor 8 approaches the end, the receiving blade 9 rises as shown by the two-dot chain line in FIG. 1 due to the operation of the cylinder 10, and the sewing machine body 2 moves in the opposite direction. Then cut the corner of the back end of the tatami. After this cutting operation is completed, the sewing machine body 2 moves forward again and the tatami floor cutting blade 7 completes the cutting. Previously, similar cuts were made by hand using a knife called a pick-up knife.

When cutting the tatami floor as described above, the flat stab presser 5 and the tatami surface cutting blade 11 play an important role. The flat stitch presser foot 5 is attached to the sewing machine body 2 so as to be movable up and down in front of the tatami floor cutting blade 7 in the advancing direction and at the same slope as the mounting slope a of the tatami floor cutting blade. This vertical movement is caused by a cylinder 12 provided at the top. The tatami surface cutting blade 11 is mounted on the lower surface of the flat stitch presser foot 5, forward of the position of the sewing needle 3 in the direction of travel, so as to be in the same plane as the traveling surface of the tatami floor cutting blade 7. In this way, the tatami surface cutting blade 11 is moved to the lower surface of the flat presser foot 5, which moves up and down at almost the same slope as the installation slope of the tatami bed cutting blade 7.
By providing this, it is possible to cut the tatami surface in a way that always matches the cutting surface of the tatami floor cutting blade 7 that corresponds to the thickness of the tatami floor 8.

<Effects of the Invention> By configuring the tatami face width cutting device in the tatami edge sewing machine as described above, even if the thickness of the tatami bed changes, the tatami face width cutting, sewing, and cutting of the tatami bed can be performed accurately. This can now be done automatically.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a tatami face width cutting device of a tatami edge sewing machine, and FIG. 2 is an enlarged side view of the same device. 1...Rail, 2...Sewing machine body, 3...Sewing needle, 4...Hook portion, 5...Flat stitch presser foot, 6...Tatami surface width cutting device, 7...Tatami floor cutting blade, 8... Tatami floor, 9
... Picking blade, 10, 12... Cylinder, 11... Tatami-omote cutting blade.

Claims (1)

[Claims] 1. In the tatami face width cutting device attached to the flat stitch sewing machine for tatami edges, the flat stitch presser foot 5 can be moved up and down in front of the tatami floor cutting blade 7 in the direction of travel and at a slope that is almost the same as the installation slope of the blade. Attached to 2, tatami surface cutting blade 1
1 is mounted on the lower surface of the flat stab presser 5 so as to be in substantially the same plane as the advancing plane of the tatami floor cutting blade 7.