JP3037598B2 - Tatami surface cutting device in tatami edge sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami-edge cutting machine in a tatami-edge sewing machine capable of simultaneously cutting an edge of a tatami floor and simultaneously cutting a tatami front width.

[0002]

2. Description of the Related Art In a conventional tatami edge sewing machine, a tatami surface cutting device for cutting a tatami mat at a predetermined tatami width is separated from a cutting blade at a side edge of a tatami floor by a different cutting blade according to the sewing size of the tatami mat width. There is an automated one that cuts at the same time. However, in general, a blade for cutting the tatami surface (tatami surface cutting blade) is attached to the main body, so it is necessary to make fine adjustments according to the thickness of the tatami floor at the time of cutting, in this case, the tatami floor cutting blade It was necessary to automate the vertical position adjustment. Further, the tatami surface cutting blade was a straight or curved fixed blade or a free-rotating rotary blade.

[0003]

The automation of cutting a tatami surface at the same time as a tatami floor cutting and sewing a sewn cloth with a flat stitch sewing machine has been a revolutionary one. This is a straight blade mounted so that the lower surface of the presser is approximately in the same plane as the advancing surface of the tatami floor cutting blade. However, when replacing the tatami mats, the tatami mat floor is already cut to a fixed size, so only the tatami mats will be cut. Tatami mats that match the floor width cannot be cut. Attempts were made to reduce the cutting resistance by using a tatami surface cutting blade as a rotary blade, but this was not sufficient.

[0004]

In order to solve the above-mentioned drawbacks, the present invention, as a result of various studies, has found that a rotary blade is used as a tatami surface cutting blade and a drive rotary blade is driven positively. It has been found that displacement of the cutting position can be prevented. That is, a tatami surface cutting blade, which moves up and down in synchronization with the tatami press of the sewing machine at the tatami edge, is used as a rotary drive blade , and
Power transmission path from the drive source provided in the sewing machine body to the blade power
It was supplied via .

In order to make this tatami surface cutting blade a drive rotary blade,
A drive motor may be directly connected to the rotating shaft, but unless a small and large torque motor is used, the mounting space is limited and is not easy. The positional relationship between the tatami mat cutting blade and the tatami mat needs to be linked to the tatami press of the sewing machine, and the simplest method is to attach the tatami mat to a part of the tatami press. However, the tatami mat press must hold the tatami mat surface when sewing the sewing machine, and must be lifted off the tatami mat floor when the sewing machine is stationary or moving, and the transmission method from the drive source of the sewing machine main body becomes a problem. In this regard, the present invention solves this problem by devising a transmission belt and a belt pulley transmission mechanism from the drive motor shaft of the sewing machine main body to the rotary drive shaft of the tatami surface cutting blade. That is, the respective lower movable pulley and the upper movable pulley around <br/> on the end and the lower position of Tatamiosae arm that moves up and down provided for tatami surface from the sewing machine main body, between the motor shaft and the pulleys The transmission belt is stretched, and the length of the transmission belt between the lower movable pulley, the upper movable pulley, and the motor shaft is maintained at the same length even if the tatami mat pressing arm moves up and down, so that the sewing machine is maintained in a tensioned state. A power transmission path having a guide pulley provided on the main body side is formed, and a rotary blade is provided on a lower movable shaft of the movable pulley rotating shaft to form a tatami surface cutting blade.

[0006] Each of these pulleys is preferably arranged in the same plane. The case where the motor is fixed to the sewing machine main body, and the case where the motor is provided coaxially with the axis of the upper movable pulley so as to move up and down together with the folding press arm. There is. Further, in addition to the guide pulley having a fixed shaft, the movable shaft may have a function of a so-called tension pulley.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a tatami edge sewing machine equipped with a tatami surface cutting apparatus according to the present invention, in which a part of an intermediate portion is omitted.
FIG. 2 is a side view of the same. These drawings are examples of the tatami edge sewing machine, and the present invention is not limited thereto. In the case of the apparatus shown in FIG. 1, a sewing machine 2 and a tatami floor 3 are provided on a base frame 1, and the sewing machine 2 moves along a guide rail 4 between a sewing start position on the left side and a sewing end position on the right side in FIG. Reciprocating between Tatami floor cutting blade 5 consisting of a straight blade at the left rear of sewing machine 2
And interlocks with the sewing machine 2. Tatami floor cutting blade 5 is Tatami floor stand 3
The tatami mat 6 is cut to fit the width of the tatami mat 6 placed thereon. The tatami mat 7 is placed on the tatami mat 6 and the tatami mat is sewn. The tatami mat 7 protruding from both side edges of the tatami mat 6 is cut by the tatami mat cutting blade 9 which moves up and down together with the tatami mat presser 8 of the sewing machine 2 at the same position as the cutting position of the tatami mat cutting blade 5 in advance.

A feature of the present invention lies in that a tatami surface cutting blade 9 which moves up and down in synchronization with a tatami presser 8 of a sewing machine at a tatami edge is a rotary driving blade. As a result, the tatami surface cutting blade 9
Does not rotate and cut the tatami table 7 with the movement of the sewing machine 2, but instead of producing new tatami mats, as well as replacing old tatami mats with the presser from above, Even when there is no support, the tatami table 7 does not shift due to the pressing at the time of cutting. In particular, the direction in which the rotation direction follows the traveling direction of the sewing machine 2, that is,
When cutting the tatami table 7 from left to right in FIG. 1, if the tatami table cutting blade 9 is rotated to the left, there is no displacement of the tatami table 7, and accurate and clean cutting can be performed.

In this case, it is necessary to cut only the tatami table 7 and adjust the depth of the tatami table cutting blade 9 to a depth at which the tatami floor 6 does not cut much. 8 and the vertical cutting blade 9 from the holding position.
The depth is constant, and once adjusted, there is no need to change the position. Of course, even if the thickness of the tatami floor changes, it can cope well. However, in such a case, in order to provide a drive shaft to the tatami surface cutting blade 9, a special contrivance is required for transmission from the drive motor on the sewing machine main body side, but the present invention has solved the following problem. That is, as shown in FIGS. 3 and 4, a tatami pressing arm that moves up and down from the main body of the sewing machine 2 to the tatami surface.
The lower movable pulley 11
And an upper movable pulley 12, a transmission belt 15 is stretched between the motor shaft 13 and these pulleys, and a length of the transmission belt 15 between the lower movable pulley 11, the upper movable pulley 12, and the motor shaft 13 is set. However, a guide pulley is provided on the sewing machine 2 main body side so that the tensioned state is maintained at the same length even when the tatami surface holding arm 10 is vertically moved.

The tatami surface cutting blade 9 is a lower movable shaft of a lower movable pulley 11.
Provided coaxially with 18 and driven to rotate, together with the upper movable shaft 19 of the upper movable pulley 12, fixed to the tatami presser arm 10,
10 moves up and down along a slide rail 20 fixed to the sewing machine 2. In this case, the vertical movement of the tatami surface cutting blade 9 is moved downward by manually tilting the vertical movement lever 21. However, the vertical movement may be automatically performed by a motor or an air cylinder.

The transmission belt 15 is indicated by a bold line in FIG.
And the driving force of the motor 22 is always
To the lower movable shaft 18 to rotationally drive the tatami surface cutting blade 9. Even if the tatami presser arm 10 moves up and down between the positions indicated by the solid line and the imaginary line in FIG. 3, the length of the transmission belt 15 is designed to be invariable as indicated by the thick line and the imaginary line. is there. In the case of the first example shown in FIG. 3, the guide pulley fixed to the sewing machine 2
Between the lower movable pulley 11 and the upper guide pulley 17
Are arranged between the motor pulley 14 and the upper movable pulley 12, respectively.

FIG. 5 shows a second example showing another method of stretching the transmission belt 15. In this case, the only guide pulley is the lower guide pulley 16. By bringing the mounting position of the motor 22 closer to the upper movable pulley 12, the upper guide pulley as shown in FIG. 3 is omitted.

FIG. 6 shows a third example of the tension of the transmission belt 15. In this case, the motor 22 is directly attached to the upper end of the folding press arm 10 so that the motor shaft 13 is shared with the axis of the upper movable pulley 12, and The motor 22 moves up and down with the up and down movement of the motor 10.
The guide pulley includes a lower guide pulley 16 and an upper guide pulley 17, but the lower guide pulley 16 is omitted and the transmission belt 15 is moved outward with the upper guide pulley 17 as a tension pulley.
(Left side in the figure) in an energized state.

[0014]

According to the tatami table cutting apparatus of the present invention described in detail above, it is possible to provide a tatami table cutting apparatus which can stably cut a tatami table even when only the tatami table is cut on an old tatami floor such as a tatami table replacement. . As a result, there is no misalignment of the tatami mat when replacing the old tatami floor, as well as when manufacturing new tatami mats, and the tatami mat can be replaced automatically and in a short time without manual misalignment correction. It is.

[Brief description of the drawings]

FIG. 1 is a front view of a tatami edge sewing machine equipped with a tatami surface cutting device, with a part of an intermediate portion thereof omitted.

FIG. 2 is a side view of a tatami edge sewing machine equipped with a tatami surface cutting device.

FIG. 3 is a front view showing a first example of the present apparatus.

FIG. 4 is a side view showing a first example of the present apparatus.

FIG. 5 is a front view showing a second example of the present apparatus.

6 is a positive plane view showing a second example of the present device.

[Explanation of symbols]

 2 sewing machine 3 tatami floor stand 5 tatami floor cutting blade 6 tatami floor 7 tatami table 8 tatami presser 9 tatami table cutting blade 10 tatami presser arm 11 lower movable pulley 12 upper movable pulley 14 motor pulley 15 transmission belt 16 lower guide pulley 17 upper guide pulley 20 slide Rail 22 motor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B26D 1/14 B26D 5/08 D05B 23/00 B26D 1/04

Claims (2)

(57) [Claims] A tatami surface cutting blade, which moves up and down in synchronization with a tatami press of a sewing machine at a tatami edge, is a rotary drive blade.
Power is supplied from a drive source provided in the sewing machine through a power transmission path.
A tatami surface cutting device in a tatami edge sewing machine, characterized in that the tatami surface is cut and supplied . A power transmission path to the rotary drive blade is provided with a lower movable pulley and an upper movable pulley at a predetermined lower position and near an upper end of a tatami pressing arm which moves up and down from the sewing machine main body to the tatami surface. A transmission belt is stretched between the shaft and these pulleys, and the length of the transmission belt between the lower movable pulley, the upper movable pulley, and the motor shaft is the same even if the tatami mat pressing arm moves up and down. a power transmission path formed by a guide pulley on the sewing machine body side so as to hold the tension, under a movable shaft of the lower movable pulley rotary shaft
The tatami surface cutting device in the tatami edge sewing machine according to claim 1, wherein the provided rotary blade is driven to rotate .