JP2015216999A - Tatami sewing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, in the conventional tatami sewing apparatus, it is necessary to adjust the piercing position of a sewing needle at the time of reverse stitching according to the thickness of a tatami and to adjust a tatami receiving part, so that it is necessary to perform adjustment whenever the thickness of a tatami changes, and it takes time before the start of sewing.SOLUTION: A tatami sewing apparatus includes: a rail on which a sewing machine base moves; a sewing machine sewing part provided on the sewing machine base so as to be capable of advancing to and retreating from a tatami; a cutting blade provided on the sewing machine sewing part or on the sewing machine base so as to be capable of advancing to and retreating from the tatami integrally with the sewing machine sewing part; a tatami receiving part provided on the sewing machine base; a tatami table capable of being inclined at the time of reverse stitching while the tatami is fixed; and a stopper brought into contact with the inclined tatami table to determine the inclination angle of the tatami table.

Description

  The present invention relates to a tatami sewing machine. More particularly, the present invention relates to a tatami stitching machine in which a tatami mat is placed on a tatami mat and a flat stitch sewing process and a reverse stitching process are performed by one sewing machine.

  Conventionally, a tatami stitching machine that performs a flat stitch sewing process and a reverse stitching process with a single sewing machine is known. As shown in Patent Document 1 and Patent Document 2, since the flat stitching process and the reverse stitching process are performed with one sewing machine, that is, one sewing needle, the side of the tatami is usually used during the reverse stitching process. It is known to have a mechanism for tilting a tatami table on which a tatami mat is placed and fixed in order to perform reverse stitching.

And in patent document 2, it has a receiving surface higher than a 1st receiving member in the 1st receiving member which supports the lower surface of the edge of a tatami in the case of a reverse stitching process, and a tatami is used at the time of reverse stitching of a thin tatami mat. There is known a dual-purpose sewing machine configured so that a second receiving member that supports the lower surface of the edge portion can be detachably attached.
Patent Document 2 also describes that a mechanism for adjusting the entry position of a sewing needle for sewing a tatami mat is conventionally provided, and FIG. 3 of Patent Document 2 illustrates and describes the adjustment range.
Non-Patent Document 1 provides the user with information on the specifications and appearance of the tatami stitching machine and how it moves in the applicant's homepage when the applicant manufactures and sells conventional tatami stitching machines. In order to do this, videos can also be viewed on the Internet.

JP 2002-126383 A Japanese Patent Laid-Open No. 10-24179

Kyokuto Sangyo Co., Ltd., new dual-purpose machine “Twin Meister”, [online], Kyokuto Sangyo Co., Ltd., [Search April 21, 2014], Internet <URL: http: //www.kyokuto-sanki. co.jp/products/pro-423.htm>

  Conventionally, in the tatami mat sewing device as in Patent Document 2, the position where the sewing needle enters the tatami can be adjusted. However, if the thickness of the tatami changes, the adjustment mechanism is operated. It took time and effort to adjust the entry position of the sewing needle to the tatami mat.

  In addition, the angle of the receiving portion of the first receiving member can be adjusted, and it is necessary to adjust the angle of the adjusting base. If the thickness of the tatami mat changes, there are many adjustment points and improvement is desired. It was.

In the tatami stitching device of Non-Patent Document 1, when performing reverse stitching separately from the tatami receiving portion when performing flat stitch sewing on the sewing machine portion that can move back and forth in the width direction of the tatami when performing habit-sewing Even in the video posted on the homepage, you can watch the video showing how the tatami receiving part is set to the operating position during reverse stitching by the operator switching to reverse stitching. it can. As in Non-Patent Document 1, when the tatami receiving portion is provided in the sewing machine portion, the positional relationship between the sewing machine and the tatami receiving portion can be made constant. If you want to change the entry position of the sewing needle with respect to the tatami mat to change the length, it is necessary to adjust each time using the conventional mechanism, the sewing operation must be stopped, and until the sewing is resumed It took time and effort to make adjustments, and inefficiency was desired.

  In order to solve the above-mentioned problems, a first aspect of the present invention provides a tatami stitching machine that performs a flat stitching process and a reverse stitching process with a single sewing needle, along the direction of tatami flat stitching and reverse stitching. A rail on which the sewing machine base moves, a sewing machine sewing part provided on the sewing machine base so as to be able to advance and retreat with respect to the tatami mat, and provided on the sewing machine sewing part or on the sewing machine base. A cutting blade provided so as to be able to advance and retreat with respect to the tatami integrally with the wearing portion, a tatami receiving portion provided on the sewing machine base, and a tatami that can be tilted during reverse sewing with the tatami fixed. And a stopper that determines the inclination angle of the tatami stand by abutting against the tilted tatami stand, and in the flat piercing process, the sewing machine sewing portion and the cutting blade advance and retreat on the sewing machine base with respect to the tatami mat. In order to perform the reverse stitching process In its and adjusting the sewing height backstitch change the rush position of the sewing needle relative tatami sides by a sewing machine sewing unit moves forward and backward on the sewing machine base relative tatami.

  Further, according to a second aspect of the present invention, the tatami receiving portion is positioned in the horizontal direction during the flat stab process and is held from the bottom side of the tatami mat to be stabbed and sewed. The tatami mat is held from the bottom surface side of the tatami mat that is inclined at an angle substantially equal to the inclination of the tatami mat and is stitched back.

  According to a third aspect of the present invention, the tilt angle of the tatami mat can be adjusted by attaching / detaching or replacing the stopper.

Further, according to claim 4 of the present invention, at least one or more detachable tatami receiving portions that can be attached to and detached from the inclined tatami receiving portion are attached to and detached from the tatami receiving portion, and can be adjusted in two or more stages. It is characterized by being in a state of being inclined at an angle substantially equal to the inclination angle of the tatami mat.

  According to the present invention, the sewing machine has the sewing machine sewn part provided on the sewing machine base and capable of moving forward and backward with respect to the tatami mat, and the tatami receiving part provided on the sewing machine base. Regardless of advance or retreat, it is in a state provided on the sewing machine base, it is in a state of holding the bottom side of the tatami during the flat stab process and the reverse stitching process, and the position of the bottom of the tatami does not change even when the thickness of the tatami changes, Since only the upper surface position of the tatami mat is changed, the sewing height at the time of reverse stitching can be adjusted by moving the sewing machine sewn portion forward and backward with respect to the tatami mat.

  Furthermore, with the above structure, even during reverse stitching, the sewing height at the time of reverse stitching can be adjusted by advancing and retracting the sewing machine sewing portion to the tatami mat in the manner of performing habit removal during the flat stitching process. It is possible to provide a tatami stitching device that is easy for the operator to use.

  If the tatami mating section is positioned horizontally in the flat stitching process, and the common tatami mating section is tilted at the same inclination as the tatami stand during the reverse stitching process, the tatami mating section is flattened and reverse stitched. The number of parts can be reduced.

By simply adjusting the inclination of the tatami table by attaching or detaching or replacing the stopper, it is possible to provide a convenient tatami stitching device without using a complicated adjustment mechanism. In addition, a user-friendly tatami mating device can be provided by detaching the detachable tatami receiving portion from the tatami receiving portion.

It is a top view of the tatami stitch machine of the present invention. It is a front view of the tatami stitch machine of the present invention. It is a side view of the tatami stitch machine of the present invention. It is a figure explaining the flat stab process of the tatami stitch machine of this invention. It is a figure explaining the adjustment of the sewing machine part at the time of changing from the flat stitch process of the tatami stitch machine of the present invention to the reverse stitching process. It is a figure explaining the reverse stitching process of the tatami stitch machine of the present invention. It is a figure explaining the reverse stitching process in the thin tatami of the tatami stitch machine of the present invention. It is an enlarged view explaining the reverse stitching process in the thin tatami mat and thick tatami mat of the present invention.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a tatami-stitching machine according to the present invention, FIG. 2 is a front view, and FIG. 3 is a side view. In the figure, 1 is a tatami sewing device of the present invention, T is a tatami mat, 2 is a tatami stand on which a tatami floor is placed, and 3 is a tatami mat 2 by pressing the tatami T from above with respect to the tatami stand 2. Fixed tatami presser, 4 is a sewing machine that runs on the side of the tatami stand along the rail 12, 5 is a sewing needle, and 14 is used for positioning the tatami mat and adjusting the linearity of the reed weave (I muscle) on the tatami surface. It is a ruler.

  The sewing machine 4 includes a sewing machine sewn part 6 and a sewing machine base 7, and a sewing machine rail 11 is provided on the sewing machine base 7 that allows the sewing machine sewn part 6 to move back and forth in the direction of the tatami T. The position of the sewing machine sewn portion 6 with respect to the tatami can be adjusted by operating at 11a and moving on the machine rail 11.

  The sewing machine sewing portion 6 is further provided with a rail 13 and a cutting unit 9 provided with a cutting blade 8 for cutting the tatami T on the rail 13. The positions of the sewing needle 5 and the cutting blade 8 are determined. It can be changed. The width of the tatami edge after sewing can be adjusted by adjusting the position of the cutting unit 9 with respect to the position of the sewing needle 5, and the position is adjusted by the handle 13a.

  The sewing machine base 7 moves on the rail 12 while performing flat stitch stitching and reverse stitching at an arbitrary feed pitch in the length direction of the tatami mat T. Further, the sewing machine base 7 is provided with a tatami receiving portion 10, and the angle can be changed by a cylinder 10a.

  Further, the sewing machine sewn portion 6 is provided with a flat stab pressing portion 6a that can be lifted and lowered from the surface side of the tatami T in the flat stab process, and the surface of the tatami T in the reverse stitching process. A reverse stitch presser 6b that presses the side and the side is provided. The reverse stitch presser 6b functions to press the tatami edge along the tatami surface and side surfaces, and is positioned at the use position and the retracted position by the cylinder 6c.

  The tatami mat 2 is configured to be capable of tilting and turning in a state where the tatami T is placed and fixed on the frame of the tatami sewing apparatus 1. As shown in FIG. 3, the inclination of the tatami table 2 is performed by the operation of the cylinder 15, and the inclination angle is determined by a part of the tatami table 2 coming into contact with the stopper 16. Therefore, if the tip of the stopper 16 is made detachable and the stopper 16 installed at the tip is prepared in various lengths, the inclination angle can be adjusted by simply changing the stopper depending on the thickness of the tatami T. It has a configuration.

  In addition, a state in which the tip is simply attached to the tip is a first slope stopper, a state in which the first slope stopper is removed is a second slope stopper, and the first slope is a slope for performing thick tatami reverse stitching. The inclination of 2 may be an inclination for performing thin tatami mat reverse stitching. The tatami mat 2 is also provided with a reversing device 17 for reversing the tatami T.

Reference numeral 18 denotes an edge supply reel, 19 denotes a lower edge paper supply reel, and a thickness adjusting member supply reel is not specifically shown, but it may be installed in the same manner as the edge supply reel 18 and the lower edge paper supply reel 19. It may be left on the floor where it will not interfere with the movement of the sewing machine 4. Conventionally, these are provided on the sewing machine 4 and supplied while being sewn, or are provided on the side of the tatami sewing apparatus 1 and are set so as to follow the tatami T and sewn. Known from. Reference numeral 20 denotes a reversing device for reversing the tatami T 180 degrees.

  In FIG. 2, in order to make the structure of the sewing machine 4 visible, a part of the tatami mat presser 3 and the like are shown in a cutout state. Also in FIG. 3, the edge supply reel 18 and the under-edge paper supply reel 19 described later are omitted so that the side surface of the sewing machine 4 can be seen.

  FIG. 4 is a diagram for explaining a state where the flat stab process is performed. The sewing needle 5 enters the tatami T from the upper surface side of the tatami T pressed from above by the flat stab pressing portion 6a, and It protrudes to the lower surface side, the lower thread is hung, and the edge and lower edge paper (not shown) are sewn to the vicinity of the side of the tatami mat. At this time, the upper front side of the tatami is cut into a straight line by the cutting blade 8.

  If it is the lower front side, while operating the handle 11a as described above, the sewing machine sewn part 6 is moved forward and backward with respect to the tatami T, while cutting with the cutting blade 8 according to the shape of the tatami to be manufactured, The edge and the paper under the edge are sewn.

  Sewing during the flat stab process may be either main sewing or single ring sewing. In a conventionally known machine that manually adjusts the sewing position of the cutting position of the habit removal, the main stitching is employed for both the flat stitching process and the reverse stitching process.

  When the flat stab process is completed, the sewing machine 4 is changed to perform the reverse stitching process. The change will be described. First, the tatami T is inclined while being fixed to the tatami table 2. The tatami mat 2 is tilted by the operation of the cylinder 15, and the tilt angle is determined by the tatami mat 2 abutting against the stopper 16 as shown in FIG.

  The tatami mating portion 10 provided on the sewing machine base 7 is inclined at the same angle as the tatami mat 2 by the operation of the cylinder 10a. Further, by the operation of the cylinder 6c, the reverse stitch presser 6b is positioned at the operating position.

  In the embodiment of the present invention, the tatami receiving portion 10 receives the bottom surface of the tatami T at a horizontal position during the flat stab process, and receives the bottom surface of the tatami T in an inclined state during the reverse stitching process. I am receiving. Conventionally, the tatami mating portions are separate in the flat stab process and the reverse stitching process, but the number of parts can be reduced by using them in common. In addition, since the tatami T is flexible to some extent, the inclination angle of the tatami mat receiving portion 10 may be different from the tatami mat 2 by about 1 to 2 degrees without being completely matched. However, if various materials such as an insulation board used for the tatami floor are warped too much, cracks may occur. Therefore, it is desirable to keep the angle of the tatami mat 2 and the tatami mating portion 10 as the same as possible. .

  A sewing needle 5 is provided at the sewing portion 6, and a sewing table 21 to which the sewing needle 5 is attached is slidably provided on a sewing table rail 22. The sewing table 21 is moved by the mechanism and the tatami mat T is sewn by the sewing needle 5. The entire sewing block 23 to which the sewing base rail 22 is attached is sewn to the position of blank stitching (position where flat stitching is performed) and the tatami mat T with the swing cylinder 24 provided in the sewing machine sewing portion 6. 5 is configured to perform sewing in the reverse stitching process by swinging around the turning fulcrum 25 to the reverse stitching sewing position where 5 is entered. The operation of the sewing needle 5 is the same in both the flat stitching process and the reverse stitching process, but the reverse stitching is performed by the operation of the swing cylinder 24.

  A sensor for detecting the rotation of the transmission shaft of the sewing table 21 is provided so that the sewing table reciprocates once when the shaft rotates several times. Although not shown, a detection plate provided on the shaft by a sensor is not shown. Is detected by the sensor to detect the rotational speed of the shaft and control the operation timing of the swing cylinder 24. By this control, positioning control is performed to determine whether the sewing needle 5 enters the tatami T or the empty sewing position.

  The tatami mat T for which the flat stab process has been completed is subjected to reverse stitching after the corners of the edge and the paper under the edge have been fixed. Next, the process of performing reverse stitching will be described.

  FIG. 6 shows the tatami stitching device 1 that has been adjusted to the state of the reverse stitching process. FIG. 6 shows the angle at which the tilt angle is determined by the stopper 16, and the thick tatami is reversely sewed.

  In the embodiment of the present invention, the inclination angle of the tatami mat 2 determined by the stopper 16 is set to 50 degrees, and the angle of the tatami receiving portion 10 is similarly set to 50 degrees, and the swinging cylinder 24 swings the sewing needle 5. When the moving angle is 8 degrees, the angle at which the sewing bee 5 enters the bottom surface of the tatami T in the reverse stitching is 32 degrees, and the sewing height is about 9 mm in the tatami mat having a thickness of about 15 mm, that is, from the bottom surface of the tatami T. If the sewing needle is inserted into a position about 9 mm above, a sewing depth of about 15 mm can be obtained. Therefore, if the user is satisfied with the specification of the sewing depth of 15 mm, the inclination angle of the tatami mat 2 and the tatami receiving portion 10 is Flat stab and reverse stitching can be performed from a thick tatami to a thin tatami without having to make another angle at about 50 degrees. In the case of thin tatami mats when the sewing depth is shallow, tightening of the thread may damage the back of the tatami mat. Therefore, the sewing height can be increased, the piercing angle of the sewing needle can be decreased, and There is a demand for a tatami mat manufacturer to increase the position at which the sewing needle protrudes on the back surface, that is, the sewing depth.

  As shown in FIG. 6, since the sewing needle 5 is brought into the entry position into the tatami T by the operation of the swing cylinder 24, the operator adjusts the position of the sewing machine sewing portion 6 using the handle 11a. . At this time, since the tatami receiving portion 10 is already inclined by the cylinder 10a, the tatami receiving portion 10 is positioned along the bottom surface of the tatami T near the sewing position as shown in FIG. It is only necessary to adjust the position of the sewing machine sewn part 6 that determines the height position. When the sewing height is determined, the sewing depth is also determined.

  When the position adjustment of the sewing machine sewing portion 6 is completed, the thickness adjusting material is pulled out from the thickness adjusting material supply reel as before, and when the thickness adjusting material is set at the sewing position at the time of reverse stitching and sewing is started, reverse stitching is performed. Is done.

  The sewing machine 4 advances on the rail 12 while performing reverse stitching along the length direction of the tatami T. Since the tatami mat is straight on the upper front side, it is not necessary to adjust the position of the sewing machine.

  When adjusting the sewing height (depth) of reverse stitching during reverse feed stitching, the sewing machine sewn portion 6 can move on the sewing machine base 7, so that the tatami receiving portion 10 holding the tatami T is attached to the tatami receiving portion 10. On the other hand, even when the reverse stitching operation is being performed, if the sewing needle 5 does not enter the tatami T, the sewing needle 5 is adjusted by adjusting the position of the sewing machine sewing portion 6. The entry position for the tatami mat T can be adjusted.

  In the conventional apparatus, the adjustment of the tatami receiving portion and the change of the sewing needle entry position of the sewing machine could not be performed during the sewing operation, so the position of the sewing machine sewing portion 6 can be adjusted only by operating the handle. By making it possible to change the sewing height (depth), it is possible to make the device very convenient for the operator.

  In particular, when the amount of habit on the lower front side of the tatami is large, for example, when the habit is a depression that is concave only near the center of the tatami, the position where the sewing needle 5 enters the tatami T becomes closer to the center of the tatami T. Is positioned on the bottom side of the tatami T, and a tatami mat with a good finish can be obtained by adjusting the sewing height high, that is, by adjusting the sewing depth deeply. Also, in the case of the tatami where the width of the tatami is reduced from the start of sewing to the end of sewing and vice versa, if the tatami T remains fixed on the tatami table 2, As the width dimension of the sewing machine becomes smaller, the sewing needle 5 comes off from the edge because the entry position of the sewing needle 5 becomes the bottom side of the tatami mat T as described above. In order to prevent this, the position of the sewing machine sewn portion 6 can be adjusted to improve the finish. In the present invention, since the position of the sewing machine sewing portion 6 can be adjusted even during sewing, there is no need for the trouble of stopping the sewing of the sewing machine and adjusting the entry position of the sewing needle 5 and adjusting the tatami receiving portion. can do.

  Next, adjusting the tatami mat 2 to another angle and performing reverse stitching will be described. As shown in FIG. 7, the stopper 16 for determining the inclination angle is made detachable, and the tatami mat 2 is inclined in the removed state. Of course, it is possible to adjust the stopper 16 by changing its length.

  The stopper 16 is provided with several pins on the attaching / detaching surface, and the attaching side is provided with a fitting hole, and the stopper 16 is provided with a fitting hole, and is attached so as to cover the attaching side. What is necessary is just to have a structure, and it is good to be able to adjust the inclination angle with a simple structure.

  FIG. 7 discloses a state in which the inclination angle is adjusted by the second stopper 16a with the stopper 16 removed. This angle is preferably about several degrees from the inclination angle determined by the stopper 16, for example, about 53 to 57 degrees. That is, it is desirable to set the angle at which the sewing needle 5 enters at about 29 to 25 degrees with respect to the bottom surface of the tatami mat. This is because if the entry angle is too small, the resistance applied to the sewing needle 5 increases, so that the tatami floor of a thin tatami mat may be damaged or the sewing needle itself may be damaged.

  The tatami mat receiving portion 10 is attached so as to cover a separate angle adjusting guide 10b, and receives the tatami T from the bottom surface side of the tatami T along the bottom surface of the tatami T adjusted to a different angle. Since only the separate angle adjustment guide 10b is put on, a delicate adjustment or the like is unnecessary, and the angle adjustment can be handled very easily. The angle adjusting guide 10b only needs to be held so as not to be displaced as the sewing machine 4 advances by sewing, and may cover the tatami receiving portion 10 so as not to interfere with the movement of the sewing needle. .

  Of course, it is also possible to provide a stopper that adjusts the inclination angle of the tatami stand 2 and adjust the inclination angle of the tatami receiving portion 10 by the length and attachment / detachment of the stopper. However, if the stopper is provided in a limited space position on the bottom surface side of the tatami T, the position of the tatami receiving portion 10 is reduced because the size of the member is reduced, so that the operator can adjust the stopper position. It is desirable that the separate angle adjusting guide 10b be configured so that it can be easily attached / detached rather than giving attention.

  If the inclination of the tatami mat 2 and the angle of the tatami receiving portion 10 (angle adjusting guide 10b) can be adjusted, the position of the sewing sewing portion 6 is adjusted to adjust the entry position of the sewing needle 5 into the tatami T and sew. It is only necessary to determine the height and perform reverse stitching.

  FIG. 8 shows a thick tatami mat that performs reverse stitching at the first angle as a two-dot chain line, a thin tatami mat that performs reverse stitching at the second angle as a solid line, and the difference in the inclination of the tatami T and the sewing due to the difference in angle. It is the figure which expanded and showed the positional relationship of the needle | hook landing 5 easily.

  Even at the first tilt angle tilted by the stopper 16 and at the second tilt angle tilted by the second stopper 16a, the sewing needle 6 is simply moved forward and backward with respect to the tatami T. The entry position can be adjusted, and the adjustment of the entry position of the sewing needle can be performed during sewing in the same manner as the removal of a flat stab. As a result, by adjusting the position of the sewing machine 4 in the flat stitching process also in the reverse stitching process, the sewing height of the reverse stitching can be adjusted, and the sewing depth desired by the operator can be obtained. A landing gear can be provided.

  In the above description, as an explanation of the configuration that reduces the cost, the operator can manually move the sewing machine sewn portion 6 by operating the handle to move the habit of the flat stitching process, or the reverse stitching process. Although the embodiment has been described in which the position of the sewing machine portion 6 is adjusted, the movement of the sewing machine portion 6 can be automated using numerical control.

  In the above, the embodiment in which the inclination angle of the tatami bed 2 is adjusted in two stages has been described. However, in the case where adjustment is possible in two or more stages, the stopper to be replaced and the angle adjustment guide have the same color, for example red, Blue and green colors are attached to the stopper and the angle adjustment guide. For example, 50 degrees is red, 53 degrees is blue, and 55 degrees is green. If the stopper and angle adjustment guide colors are different, tatami is used. It is convenient to use an embodiment in which the angle between the pedestal 2 and the tatami mating section can be readily understood.

In the above description, the embodiment has been described in a configuration in which the tilt of the tatami stand 2 and the tilt of the tatami receiving portion 10 are automatically tilted using a cylinder so as not to burden the operator. However, in order to reduce the cost, it is possible to adopt a configuration in which the operator himself / herself manually performs the inclination of the tatami mat 2 and the inclination of the tatami receiving portion 10.

T Tatami 1 Tatami sewing device 2 Tatami bed 3 Tatami presser 4 Sewing machine 5 Sewing needle 6 Sewing sewing part 6a Flat stitch holding part 6b Reverse stitching holding part 6c Cylinder 7 Sewing base 8 Cutting blade 9 Cutting unit 10 Tatami receiving part 10a Cylinder 11 Sewing Machine Rail 11a Handle 12 Rail 13 Rail 13a Handle 14 Ruler 15 Cylinder 16 Stopper 16a Second Stopper 17 Reversing Device 18 Edge Supply Reel 19 Edge Underfeed Supply Reel 20 Reversing Device 21 Sewing Table 22 Sewing Table Rail 23 Sewing Block 24 Swing cylinder 25 Rotation fulcrum

Claims (4)

In a tatami stitching machine that performs a flat stitching process and a reverse stitching process with one sewing needle,
Rails on which the sewing machine base moves along the direction of tatami flat stitch sewing and reverse stitch sewing;
A sewing machine sewn portion provided on the sewing machine base and capable of moving forward and backward with respect to the tatami;
A cutting blade provided on the sewing machine sewn part or on the sewing machine base and provided so as to be movable forward and backward with respect to the tatami integrally with the sewing machine sewn part;
A tatami receiving portion provided on the sewing machine base;
A tatami bed that can be tilted during reverse stitching with the tatami mat fixed,
A stopper that determines an inclination angle of the tatami mat by contacting the tilted tatami mat;
In the flat stitching process, the sewing sewing part and the cutting blade advance and retract on the sewing machine base with respect to the tatami mat, and in the reverse stitching process, the sewing machine sewing part moves on the sewing machine base to the tatami mat. A tatami-stitching device characterized by adjusting the sewing height of reverse stitching by changing the entry position of a sewing needle with respect to the side of the tatami by advancing and retreating. The tatami mating portion is positioned in the horizontal direction during the flat stab process, held from the bottom side of the tatami mat to be stitched flat, and tilted at an angle substantially equal to the tilt of the tatami table during the reverse stitch process. 2. The tatami stitching device according to claim 1, wherein the tatami stitching device is held from the bottom surface side of the tatami mat to be stitched by reverse stitching. The tatami stitching device according to claim 2, wherein the stopper can be adjusted to an inclination angle of the tatami mat by attaching or detaching or replacing the stopper. By attaching and detaching at least one detachable tatami receiving portion that can be attached to and detached from the inclined tatami receiving portion to the tatami receiving portion, an angle substantially equal to the inclination angle of the tatami stand that can be adjusted in two or more stages. The tatami stitching device according to claim 3, wherein the tatami stitching device is inclined.

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