JPH0128771Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is attached to a tatami sewing machine used in the tatami manufacturing process, and accurately cuts the edges of the tatami floor to produce beautiful and durable tatami mats. This invention relates to a tatami edge presser for a tatami sewing machine that can be used for sewing tatami mats.

(Conventional technology) In the straw tatami manufacturing process, the straw is first hardened to create a tatami floor. Tatami mats are manufactured by laying a tatami cover on the tatami floor and sewing tatami edges to the edges of the tatami mat. This tatami floor is made with the longitudinal ends about 3 cm larger than the size that will actually be laid in the room, and the so-called width is the width that is cut when the tatami mat is laid on the surface and the tatami edges are sewn. I'm going to drop it.

On the other hand, when manufacturing tatami mats, a tatami sewing machine 50 as shown in FIG. 6 is widely used. When cutting the edges as described above with this tatami sewing machine, apply the machine blade to the edge of the tatami placed on the sewing machine main body, and then We will carry out the cutting work of the section.

(Problem that the invention aims to solve) In this edge cutting work, the machine blade pushes through the tatami floor while moving forward, so when the blade touches near the corner of the tatami mat in the final process, the corner As the small straw near the corners is pressed by the forward force of the blade, it spills out, making the corners soft and weakening the corners of the tatami.When the edges of the tatami are sewn together, the corners become dented and look unsightly. The value of tatami mats is going down. This is particularly noticeable with blades that have been cut by 4 to 5 tatami mats, but it is not done because it is time-consuming to interrupt the work and sharpen the blade.

For this reason, I had no choice but to make a notch in the corner with a hand knife in advance, and then cut this part with a machine blade to avoid applying the force of the blade and cut the edge of the tatami with a machine. Making cuts with a hand knife was time-consuming and the angle of the blade did not match the machine's main body, so it was not possible to expect an elegant finish and the result was an unsightly one.

Additionally, there are two types of tatami: the aforementioned straw tatami and chemical tatami. In the case of chemical tatami, the top and bottom of foam polystyrene plates are constructed in a sandwich-like manner using compressed straw or wood fibers. Similar problems arose in the case of tatami mats, as the corners were brittle and easily crumbled, just like straw tatami mats.

(Means for solving the problem) The present invention was devised in view of the current situation, and has a presser at the tip that presses the corner of the tatami mat, a receiving part at the other end, and a presser that presses the corner of the tatami mat. A pressing rod is rotatably supported against the pressing rod, a pressing means is provided with a spring for biasing the pressing rod, and an actuating means is provided with an operating portion of the pressing rod.

(Function) An operating means is fixed below the mounting body of the machine blade of the sewing machine, and a pressing means for pressing the corner of the tatami mat is fixed below one side of the sewing machine. The tatami mat to be processed is placed on the sewing machine, and the edge of the tatami mat is cut by a predetermined width while moving the blade.In the final process of this cutting process, when the blade reaches the corner of the tatami mat, The actuating means that has moved together with the blade comes into contact with the receiving portion of the pressing rod, and presses the pressing rod to rotate it. For this reason, the presser part formed at the tip of the pressing rod presses the corner of the tatami mat, and in this state the blade cuts the corner of the tatami mat, so the corner part is cut accurately without any straw etc. falling off. .

(Example) Next, an example of the present invention will be described in detail based on the drawings. In the drawings, FIG. 1 is a front view of the first embodiment of the pressing means, FIG. 2 is a side view of the same, and FIG. 3 is a front view of the actuating means.

In this embodiment, a pressing means 10 as shown in FIG.
and actuating means 20 for actuating the pressing means 10.
Consisting of

As shown in the figure, the pressing means 10 has a bent portion 3 at its tip.
A pressing rod 1 configured with the above structure is rotatably supported on a fulcrum 6 formed in the center of a base plate 12.

The base plate 12 is a rectangular steel plate and has a stepped portion 12b in the center thereof.The central portion of the stepped portion 12b is cut out to form a long hole 9, and the lower part of the pressing rod 1 is inserted into the long hole 9. Insert it. Both ends 9 of the long hole 9
a and 9a serve as stoppers when the pressure rod 1 rotates.

The stoppers 9a, 9a may be constructed by providing a convex portion on the upper end of the substrate 12.

In the figure, reference numeral 11 denotes a mounting portion for fixing the board 12 to the sewing machine 50.

The upper part of the pressing rod 1 is slightly bent outward (to the right in FIG. 1) so as not to interfere with the operation of other instruments, and a bent part 3 is formed at the tip of the upper part. The tip is bent downward to form a holding part 2. The lower end of this pressing rod 1 is connected to an actuating means 2, which will be described later.
0 and constitutes a receiving portion 5 that comes into contact with the holder 5.

The receiving part 5 is rotatable with respect to the pressing rod 1, and avoids resistance due to friction generated between the receiving part 5 and the operating part 21 when the operating part 21 is pressed.

Further, a locking portion 1 is provided at the upper part of the fulcrum 6 of the pressing rod 1.
a, and a tension spring 7 is stretched between the locking portion 1a and a locking portion 12a provided below the substrate 12. In the figure, reference numeral 4 denotes an adjustment section, and the position of the presser section 2 can be adjusted depending on the thickness of the tatami mat.

The actuating means 20 includes a wire 20 as shown in FIG.
A is bent into a U-shape, with a circular arc part 23 in the center, an actuating part 21 at the tip, and a mounting height adjustment part 24 at the rear end.
The adjustment portion 24 is fixed to a bolt 29 with a nut 28a, and the bolt 29 is provided with an attachment portion 27 for attaching to the sewing machine 50. Since this mounting portion 27 is movable by nuts 28b, 28b, the position of contact of the operating portion 21 with the receiving portion 5 can be adjusted back and forth.

The arc portion 23 serves as a spring when the actuating portion 21 comes into contact with the receiving portion 5 of the pressing rod 1.

Next, the operation of this embodiment configured as described above will be explained.

First, as shown in FIG. 6, the pressing means 10 is fixed to one side lower part of the sewing machine 50 by the mounting portions 11, 11 of the base plate 12. As shown in FIG. On the other hand, the operating means 20 is fixed to the lower end of a moving table 53 on which the blade 30 of the sewing machine 50 is fixed and moved.

In this initial state, the tatami mat 40 is placed on the sewing machine 50, the blade 30 is applied to the cut portion of the end portion 31 of the tatami mat 40, and the movable table 53 is moved to sequentially cut the end portion 31. Meanwhile, the actuating means 20 fixed to the lower end of the moving table 53 moves forward together with the blade 30.

Then, when the blade 30 advances to the end side of the sewing machine 50 and comes near the corner of the tatami mat 40, the actuating means 20
The actuating portion 21 at the tip comes into contact with the receiving portion 5 at the lower end of the pressing rod 1 and presses it. Therefore, the tip of the pressing rod 1 rotates to the left in FIG. 1 about the fulcrum 6, and presses the tip corner of the tatami mat 40 with the presser portion 2 at the tip (see FIG. 4).

After that, the blade 30 moves further forward, and the actuating part 21 continues to press the receiving part 5, but at this time, the circular arc part 23 formed in the actuating part 21 plays the role of a spring, and the actuating part 21 continues to press the receiving part 5.
1 presses the receiving part 5 of the pressing rod 1 even more strongly, so the presser part 2 can strongly press the corner of the tatami 40 until the blade 30 finishes cutting the corner. Therefore, other spring members such as a plate spring can also be used for the arcuate portion 23.

When the end portion 31 of the tatami mat 40 is cut in this manner, the blade 30 retreats, and together with the blade 30, the actuating portion 21 also retreats, returning to the initial state. At this time, the receiving part 5 is released from the pressed state by the operating part 21, and the pressing rod 1 is rotated by the tensile force of the spring 7, returning to the initial state shown in FIG. In this way, the pressing means 10 automatically presses or releases the corners of the tatami mat 40 by moving the blade 30 forward or backward.

As described above, in this embodiment, since the pressing rod 1 and the like are attached to the substrate 12, the pressing means 10 is detachable from the machine body 50 and can be easily attached to other machines.

A second embodiment of the pressing means 10 is shown in FIG. 7, in which the pressing rod 1 is directly fixed to a mounting portion 51 of a sewing machine 50. In this embodiment, the fulcrum 6 and the spring 7 are also fixed to the machine body 50, and stoppers 8, 8 are formed at the upper end of the mounting portion 51. According to this embodiment, compared to the first embodiment, the substrate 12
is unnecessary, and the structure becomes simple.

(Effects of the invention) According to the invention, when cutting the edge of the tatami mat, the corners are pressed by the pressing means while cutting, thereby preventing the corners from collapsing and making it possible to pass through the sewing work later. We can produce beautiful and durable tatami mats. Furthermore, since the pressed state of the folding corner part can be automatically released as the blade retreats, it is possible to proceed with the work more smoothly and quickly.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a front view of the first embodiment of the pressing means, FIG. 2 is a side view of the same, FIG. 3 is a front view of the actuating means, and FIG. FIG. 5 is a front view illustrating a state in which the pressing means presses the corner of the tatami mat, FIG. 5 is a plan view of the same, and FIG. FIG. 7 is a front view of the second embodiment. 1...pressing rod, 2...pressing part, 3...bending part,
6... Fulcrum, 7... Spring, 10... Pressing means, 1
2... Substrate, 20... Actuation means, 31... End part,
30...blade, 40...tatami mat, 50...sewing machine.

Claims (1)

[Scope of utility model registration request] A pressing rod is provided with a presser at its tip for pressing the corner of the tatami mat, a receiving portion at the other end, and rotatably supported on the sewing machine body. The pressing means is fixed to one side of the sewing machine, and is attached to the sewing machine body and moves in synchronization with the blade to press the receiving part. The tatami mat for a tatami sewing machine comprises an actuating means having a part, the actuating part presses a receiving part to rotate a pressing rod, and a presser at the tip of the pressing means presses a corner of the tatami mat. Edge presser.