JP5419041B2 - A habit removal flat stitch sewing method using a tatami flat stitch sewing apparatus. - Google Patents

Description

  The present invention relates to a method for flattening stitches with a flat stitch sewing device, and in particular, cutting a side of a tatami into a predetermined size while sewing a tatami mat with a hem cloth and an underlay paper. In this process, even if the tatami is a tatami mat, the edge width of the tatami mat that has been pricked by the habit is kept constant. Hereinafter, cutting the side of the tatami into a predetermined dimension while sewing the tatami mat on the side of the tatami is referred to as “flat stitch”. Then, “to remove the habit” means to cut the side of the tatami mat in accordance with the habit deviation (inclination) at adjacent measurement points in the flat sew sewing device.

  When laying a tatami mat between new tatami mats, for example, six tatami mats, prepare a tatami floor that is slightly larger than the finished size, as shown in FIG. And the side of the side that touches the sill (called the “bottom front”) Match the angle with the other ridge to the actual shape of the room, and further cut into a shape that is bent in a "<" shape inwardly or outwardly in the center so that the lower front approximately matches the shape of the sill doing. In FIG. 5, the dotted line indicates the standard dimension between six mats.

  As shown in FIG. 6, when measuring the size of a tatami mat as a way of measuring the size of a tatami mat, the dimensions (b) and (e) In addition to the method (a) of measuring three locations with the central dimension (c) and the dimensions of the both ends (a), (e) and the central part (c) There is a method (b) of selecting and measuring five locations of the size (b) and the size (d) of the 3/4 portion.

  Of these two types of measurement methods, method (a) is called “intermediate measurement method”, and method (b) is called “booth measurement method”. Then, as shown in FIG. 6C, the measured actual size of the tatami is compared with the standard size tatami, and the difference from the lower front reference line is called “habit”. This difference is called “deviation”.

  Then, cutting a side of the tatami mat in accordance with the deviation of the habit at adjacent measurement points by the flat sew sewing device is called “getting habit”.

  As shown in the front view of FIG. 7, the side view of FIG. 8 and the plan view of FIG. 9, the flat sew sewing device includes a flat piercing sewing machine 2 having a sewing needle 21, a cutting tool 32 for cutting a tatami floor, and a tatami surface. And a cutting device 3 having a cutting tool 33 for cutting tatami mats, and performs a tatami flat stitch sewing operation.

  In order to make a flat stab while taking the lower habit according to the shape of the sill, the flat sew sewing machine device 2 and the cutting device 3 are in a direction orthogonal to the flat sew sewing direction (hereinafter referred to as the “tatami width direction”). It is configured to move freely.

  A second base 20 is placed on the rail 11 on the first base 1 and the flat sewing machine 2 is placed on the second base 20 and fixed. The take-up motor 12 is provided on the first base 1, and the flat base sewing machine 2 can be moved in the width direction of the tatami with respect to the first base 1 by moving the second base 20 by the habit removing motor 12. It is configured as follows.

  The cutting device 3 is mounted on the rail 22 of the second base 20 so as to be movable in the width direction of the tatami, and is configured to move in the width direction of the tatami sewing machine 2. Since the cutting device 3 is mounted on the rail 22 of the second base 20, the cutting device 3 moves in conjunction with the movement of the flat stitch sewing machine 2 in the tatami width direction. It is configured to be able to move independently in the width direction of the tatami mat with respect to the flat sewing machine device 2 fixed to the table 20.

  When changing the edge width of the tatami mat to be manufactured in the flat stitch sewing apparatus, the position of the cutting edge 31 of the tatami floor cutting blade 32 with respect to the sewing needle 21 (the cutting position on the tatami top surface) is changed, and the sewing needle 21 A device that changes the edge width w by changing the distance between the blade 31 and the cutting edge 31 of the tatami floor cutting blade 32 is disclosed in Patent Document 1 below. There is also known an apparatus configured to fix a tatami mat to a tatami table and move the tatami mat in the length direction of the tatami when sewing and cutting the tatami according to the habit-removing dimensions.

JP 2000-84278 A

  As described above, in the flat sew sewing device provided with the conventional flat stab sewing machine 2 and the cutting apparatus 3, the flat sew sewing machine 2 is mounted and fixed on the second base 20 so as to be movable in the tatami width direction. The tatami floor cutting blade 32 is a circular blade having serrated blades around it, and is rotated by a motor 34. 22 Therefore, the cutting device 3 is configured to be movable in the tatami width direction independently of the flat stab sewing machine device 2.

  The cutting blade is not limited to the circular blade 32, and may be a fan-shaped rocking blade that rocks a certain angle range that has been conventionally used.

  Since it is difficult to arrange the tatami floor cutting blade 32 so that the cutting edge 31 of the tatami floor cutting blade 32 comes immediately before the sewing needle 21, the front view of FIG. 7 and the plan view of FIG. As shown, the sewing needle 21 and the cutting edge 31 of the tatami floor cutting blade 32 are shifted by a length s with respect to the flat stab direction.

  As shown in the side view of FIG. 8 and the plan view of FIG. 9, the position of the tatami floor cutting blade 32 placed on the second base 20 is adjusted, and the sewing needle 21 and the tatami floor cutting blade 32 are The edge width is changed by adjusting the interval w.

  In this way, in a state where the sewing needle 21 and the cutting edge 31 of the tatami floor cutting blade 32 are shifted by the length s, the tatami floor and the tatami surface are cut after the sewing of the margin cloth and the margin paper. However, when there is no deviation in the habit at the two measurement points (see FIG. 6) (when the lower front is parallel to the upper front), as shown in FIG. The cut surface 51 is parallel and can be stabbed with a constant edge width w.

  Further, even a tatami mat with a habit must be sewn with a constant width w set over the entire length of the lower front side, as shown in FIG. 4B. However, due to the above structural problems of the flat stitch sewing apparatus, it is difficult to sew with the edge width w set over the entire length while removing the habit.

  Next, using a conventional flat sew sewing device, there is no habit at the measurement points (框) at both ends, and there is an inner habit (habit in the direction in which the width of the tatami is reduced) at the center measurement point. An example will be described in which flattening is performed while taking a habit.

  As shown exaggeratedly in FIG. 4 (c), the flat sewing machine device 2 is moved in the direction approaching and separating from the tatami (the width of the tatami) to the habit k at a speed proportional to the moving speed of the tatami. Perform sew-on operation.

At the start of flat stab, the sewing needle 21 is at the heel point a ₁ and the cutting edge 31 of the tatami floor cutting blade 32 is stationary at a point b ₁₁ away from the heel by a length s.

When sewing is started from one side of the heel by the sewing needle 21 of the flat stab sewing machine and the length s is advanced, the cutting edge 31 of the tatami floor cutting blade 32 is at a point b ₂₁ away from the reference line in front of the heel. At this time, since the sewing needle 21 is already at the point a ₂ preceding by the distance s, the interval between the perforation 52 and the cut surface 51 is narrower than w because the cut surface is offset inward. Become.

  Therefore, if the flat stab operation is continued as it is, the edge width continues to be sewn with an edge width narrower than the initially set width w.

When the sewing needle 21 advances to the center point a ₃ , the flat needle direction is changed to the outward direction, and the flat needle sewing device 2 performs the flat needle sewing operation while moving the flat needle sewing machine 2 away from the tatami. As shown in the latter half of (c), since the cutting edge 31 of the cutting tool is behind the sewing needle 21 at the point b ₄₁ , the cutting surface 51 is offset outward from the perforation 52 and the edge width is increased. Is wider than w.

Also, when cutting the tatami floor with the cutting edge 31 of the cutting tool aligned with the habit, as shown exaggeratedly in FIG. As the starting point a ₁ of 21, when sewing starts parallel to the lower reference line and proceeds to a point a _{21 that is} separated by a length s, the cutting edge 31 of the tatami floor cutting blade 32 becomes the point b ₂ of the heel. Reach and prick with a habit.

The cutting start, but the needle 21 is in a ₂₁ point distant by a length s from stiles, only not leave distance w from the reference line of the lower front, since the flat spines while taking habit from this point a ₂₁ The interval between the perforation 52 and the cut surface 51 is narrower than w.

When the cutting progresses to the center point b ₄ , the flat stitch direction is changed outward, and the flat stitch machine 2 is moved away from the tatami, the sewing and cutting operations are performed, and the latter half of FIG. As shown in FIG. ₄ , when the cutting edge 31 of the cutting tool reaches the point b ₄ , the perforation 52 is offset inward from the cut surface 51 because the perforation needle 21 is at the point a ₃₁ advanced by the length s. The edge width becomes wider than w.

  As described above, when the sewing machine needle 21 and the cutting edge 31 of the cutting blade 32 are shifted by the length s, the edge width is set when the tatami is flattened while removing the habit. A phenomenon different from w occurs.

  When the habit deviation k is small, it cannot be seen visually, but when the habit k is about 15 mm or more, the difference between the edge widths on both sides of the central portion can be clearly seen.

  Therefore, the tatami habit removing / sewing method of the present invention has been conceived to solve the problem that the edge width does not become constant as set when piercing while taking such habit.

In order to solve the above-described problems, the method of flattening and sewing a tatami mat of the present invention includes a flat-stitch sewing machine that can move in the width direction of a tatami mat to be flattened, The tatami cutting apparatus is provided with a tatami cutting apparatus having a cutting blade having a spacing s in the tatami length direction between the sewing needle of the apparatus and the cutting edge of the cutting blade, and the tatami cutting apparatus is tatami mat Using a tatami flat stitch sewing device comprising means for moving in the width direction,
At the start of flat stitch sewing, the cutting edge of the cutting blade is length r = k (s / L) (where k is the deviation of the habit at two measurement points, L: the length from the heel to the measurement point at which the habit is measured) This is a method of setting flat stitches along a planned flat stitch line having an inclination (k / L) by setting it at a position farther away from the lower front reference line in the tatami width direction.

According to another method of the present invention for removing a tatami garment, a stab stitching device that is movable in the width direction of a tatami mat to be stabbed and that stabs while taking a habit, and a sewing needle and cutting of the stab sewing machine device. A tatami cutting device provided with a cutting tool having a spacing s in the tatami length between the cutting edge of the knives and a means for moving the flat sew sewing machine device in the width direction of the tatami with respect to the tatami cutting device And using a tatami flat stitch sewing device comprising
At the start of flat stitch sewing, the cutting edge of the cutting blade is length r = k (s / L) (where k is the deviation of the habit at adjacent measurement points, L: the length from the heel to the part where the habit was measured) ) Is set at a position farther away from the lower front reference line in the width direction of the tatami mat, and flat stitch sewing is performed along a planned flat stitch line having an inclination (k / L).

  According to the tatami mating flat stitch sewing method of the present invention, even if the shape of the habit is symmetrical, asymmetrical, diagonally straight, etc., it is set over the entire length of the lower front side by performing flat stab while taking the habit It is possible to perform a flat prick with a certain edge width w.

The top view for demonstrating the process of manufacturing a tatami mat in accordance with a habit by the habit removal flat stitch sewing method of this invention, The top view for demonstrating the other process of manufacturing a tatami according to peculiarity by the peculiarity flat stitch sewing method of this invention, The top view for demonstrating the process of manufacturing a tatami according to a peculiarity by the peculiarity flat stab sewing method of this invention using other flat sew sewing devices, The top view for demonstrating the process of taking a habit by the conventional habit removal flat stitch sewing method, and manufacturing a tatami mat, A plan view showing an example of a state in which a tatami mat with a habit is laid between six tatami mats, The figure explaining how to take the dimension of the tatami with habit, The front view which shows an example of the flat stitch sewing apparatus used with the habit removal flat stitch sewing method of this invention, A side view showing an example of a flat stitch sewing device, It is a top view which shows an example of a flat stitch sewing apparatus.

  Using the tatami flat sew sewing device as an example, the flat sew sewing operation of the present invention is performed by taking a flat sew stitch while taking the peculiarity of the tatami mat (the peculiarity of the width of the tatami mat). The principle will be described with reference to FIG.

  In the tatami mat shown in FIG. 1, the habit of the flat stitch sewing start point (first measurement point) and the flat stitch sewing end point (third measurement point) is 0, and the habit of the center point (second measurement point) Q is 0. A tatami mat that is k inward (the width dimension of the next sewing position is smaller than the sewing start position) will be described as an example. In the following description, the inclination taking the habit toward the inner side of the tatami is represented by a positive numerical value, and the inclination taking the habit toward the outer side of the tatami is represented by a negative numerical value.

  As shown in FIG. 1A, when the upper front side of the tatami 5 is sewn, the position of the cutting device 3 placed on the rail 22 of the second base 20 is adjusted, The edge width is set by changing the interval w between the cutting edge 32 of the tatami floor cutting blade 32 and the cutting edge 31.

  With the sewing needle 21 and the cutting edge 31 of the tatami floor cutting blade 32 shifted by the length s, the hem and the paper under the hem are sewn, and the tatami floor and the tatami surface are cut later. When the habit is not removed, as shown in FIG. 1A, the perforation 52 and the cut surface 51 are parallel to each other with an interval w, and can be stabbed with a constant edge width w. .

In the case of taking a habit, the sewing needle 21 is stationary at the heel point a ₁ and the cutting edge 31 of the tatami floor cutting blade 32 is stationary at the point b ₁ at the start of flat stab sewing. Then, the tatami mat 5 on which the tatami mats are sewn in advance is placed and fixed on the tatami mat table 4, and a flat stitch sewing operation is performed while moving the tatami mat table 4 in the tatami mat length direction.

Even when performing flat stab sewing operation while removing the habit, as shown in FIG. 4B, the distance between the cut surface 51 and the perforation 52 must be constant. As shown in FIG. 1B in which the portion is enlarged, the sewing needle 21 is aligned with the heel point a ₁ that is separated from the lower front reference line by a width w.

Then, the cutting device 3 mounted on the second base 20 is moved in the width direction of the tatami mat, and the cutting edge 31 of the cutting blade 32 is moved from the point p at a position p away from the sewing needle 21 by the interval s. The distance r is moved to q (b ₁ ).

  The setting of the distance r will be described. Since the right triangle (pOq) including the origin O is similar to the right triangle (POQ) including the central point K and the origin O in common, the lines Oq and The slope (gradient) of the line OQ is r / s = k / L and is the same.

Therefore, the distance r between the points p and q is
r = k (s / L)
And it depends on the value of the habit k to be taken.

  As described above, the positional relationship between the sewing needle 21 and the cutting edge 31 of the tatami floor cutting blade 32 is set, and the flat stab operation is started. The moving distance of the tatami bed 4 is detected by an encoder (not shown), and the flat bar sewing machine 2 fixed to the second base 20 is moved and tilted (k / L) based on the detected moving distance. ) Is performed while taking a habit along the planned line for piercing.

When the sewing machine needle 21 finished sewing the first half to reach to the point a ₃ in the center, to migrate to the sewing of the second half. Next, the process of shifting to the latter half will be described for the case where the shape of the habit is symmetrical.

As shown in FIG. 1 (c), when the sewing needle reaches to the point a ₃ central, Hiratoge sewing device 2 fixed to the second base plate 20 is inverted by the second half of the inclined movement direction (- k / L) begins to move along the planned line of flat stitches.

However, the cutting edge 31 of the tatami floor cutting blade 32 placed on the second base 20 is at a point b ₃ after a distance s from the central point b ₄ , and has an inverted inclination (−k / L) in the moving direction. ) And the cutting blade 3 is moved by the motor 23 in the direction opposite to the moving direction of the flat sewing machine 2 while the tatami 5 is moving the distance s. It is necessary to move with respect to the two bases 20 at twice the inclination (2 k / L).

Then, when the cutting edge 31 of the tatami floor cutting blade 32 reaches the center point b ₄ and the sewing needle 21 advances from the center by a distance s to reach the point a ₄ , 2 of the tatami floor cutting blade 32 by the motor 23 is reached. The movement of the double inclination (2 k / L) is stopped, and then the cutting is performed to the opposite side along the cutting line of the latter half having the inclination (−k / L).

In this way, when the front stab with the habit is finished, the cutting edge 31 of the cutting blade reaches the intersection b ₅ between the opposite side heel and the lower front reference line, and the sewing needle 21 is pointed to the heel. It passes through a ₅ and reaches point a ₆ that is a distance s away from the ridge.

  Next, the latter half flat stitch sewing process when the shape of the habit is asymmetric (when the inclinations on both sides across one measurement point are different) will be described.

  When the shape of the habit is asymmetrical, when the cutting edge 31 of the cutting tool 32 for tatami floor cutting reaches the opposite edge and the flat piercing process is completed, FIG. 2 (a) and FIG. As shown in b), the process ends at a position shifted by a deviation δ from the lower front reference line (the habit is δ).

At this time, the inclination from the bending points a ₃ and b _{4 of} the central habit k to the end points a ₅₁ and b ₅₁ is
− (K−δ) / L
It is.

As shown in FIG. 2 (b), when the sewing needle 21 finished sewing the first half has reached a point a ₃ central, Hiratoge sewing device 2 fixed to the second base plate 20, the moving direction It reverses and starts moving along the planned sewing line having the latter slope {− (k−δ) / L}.

However, the cutting edge 31 of the tatami floor cutting blade 32 placed on the rail 22 of the second base 20 is at a point b ₃ that is a distance s away from the central point b ₄ and is inclined in the reversed moving direction { -(K-δ) / L} is canceled and the moving direction of the second base 20 during the cutting of the distance s from the point b ₃ to the point b ₄ in order to maintain the first half inclination (k / L) In the opposite direction, it is necessary to move the tatami floor cutting blade 32 with a slope {(k / L) + (k−δ) / L} which is the sum of the slope of the first half and the slope of the second half.

When the cutting edge 31 of the tatami floor cutting blade 32 reaches the center point b ₄ and the sewing needle 21 reaches the point a ₄ advanced from the center by the distance s, the inclination of the tatami floor cutting blade 32 {(k / L) + (k−δ) / L} is stopped, and thereafter, the tilt {− (k−δ) / L} is interlocked with the flat bar sewing machine 2 fixed to the second base 20. It cuts to the opposite side along the planned cutting line in the latter half.

  In this manner, when flat stitch sewing is performed while removing the habit, even if the habit shape is asymmetrical, it is possible to perform the flat stitch with the edge width w set over the entire length of the lower front side.

  As in the case of the tatami T shown in FIG. 5, in the case of a straight line without bending the shape of the habit, the operation of the first half and the latter half of the habit removing flat piercing process bent in the above-mentioned “U” shape is performed. Of these, only the first half of the process needs to be performed.

(Other embodiments)
As shown in FIGS. 7 to 9, the flat sew device used in the embodiment described above places the second base 20 on the rail 11 on the first base 1, and this second base The flat sewing machine device 2 is placed and fixed on 20, and the cutting device 3 is mounted on the rail 22 of the second base 20 and can be moved in the width direction of the tatami with respect to the flat sewing machine device 2. Has been.

  However, the second base 20 is placed on the rail 11 on the first base 1, and the cutting device 3 is placed and fixed on the second base 20, and the flat sewing machine device 2 is attached to the second base 20. It may be configured so as to be placed on the rail 22 and move in the width direction of the tatami with respect to the cutting device 3.

  Next, using the flat sew sewing device configured as described above, the latter half of the flat piercing process will be described by taking as an example a case where the shape of the habit is asymmetric. The first half piercing step is the same as the step described with reference to FIGS.

  When the shape of the habit is asymmetrical, when the cutting edge 31 of the cutting tool 32 for tatami floor cutting reaches the opposite side of the blade and the flat piercing process is completed, FIG. 3A and FIG. As shown in b), the process ends at a position shifted by a deviation δ from the lower front reference line (the habit is δ).

At this time, the inclination (gradient) from the bending points a ₃ and b _{4 of} the central habit k to the end points a ₅₁ and b ₅₁ is
− (K−δ) / L
It is.

As shown in FIG. 3 (b), when the sewing needle 21 finished sewing the first half has reached a point a ₃ central cutting edge 31 of the blade 32 of the cutting device 3, which is fixed to the second base plate 20 The cutting is continued along the planned cutting line which is at the point b ₃ after the distance s from the central point b ₄ but has an inclination (k / L) to the central point b ₄ .

Therefore, when the sewing needle 21 reaches the center point a ₃ , the moving direction of the flat bar sewing machine device 2 placed on the rail 22 of the second base 20 is reversed, and the latter inclination {− (k−δ ) / L} must be moved along the planned sewing line.

  Therefore, in order for the flat bar sewing machine 2 to cancel the inclination (k / L) of the first half of the second base 20 to which the cutting apparatus 3 is fixed and shift to the inclination {− (k−δ) / L} of the second half. The flat stitch sewing machine 2 is moved in the direction opposite to the moving direction of the second base 20 with the sum of the first half and the latter half {(k / L) + (k−δ) / L}. It is necessary to make it.

Then, when the cutting edge 31 of the tatami floor cutting blade 32 reaches the center point b ₄ and the sewing needle 21 reaches the point a ₄ advanced from the center by the distance s, the inclination {(k / L) + (k−δ) / L} is stopped, and then the inclination {− (k−δ) / L} is interlocked with the tatami floor cutting blade 32 fixed to the second base 20. It cuts to the opposite side along the planned cutting line in the latter half.

  If the shape of the habit is symmetric, the habit δ may be set to 0.

  In the embodiment described above, the positional relationship between the sewing needle 21 of the flat bar sewing machine 2 and the cutting edge 31 of the tatami floor cutting blade 32 has been described. This positional relationship is represented by the sewing needle 21 and the tatami surface cutting blade. It can be applied to the positional relationship with 33.

  As shown in the front view of FIG. 7, the tatami surface cutting blade 33 is an octagonal blade with a cutting edge formed on the entire circumference, and the length of the tatami between the sewing needle 21 and the cutting edge of the tatami surface cutting blade 33. The direction spacing is relatively small. However, when the habit deviation k is large, the phenomenon described with reference to FIG. 4C appears prominently. When the habit k is 12 mm, there is a step of about 1 mm in width between the tatami floor and the tatami surface. Arise.

  Therefore, instead of the length s in the tatami length direction between the cutting edge 31 of the control cutting blade 32 and the sewing needle 21 implemented in the tatami floor cutting blade 32, the cutting edge 31 of the sewing needle 21 and the tatami surface cutting blade 33. Can be applied to the tatami mat cutting tool 33 in the same manner.

  In order to change the old tatami mat, it is only necessary to retract the tatami floor cutting blade 32 to a place where it does not get in the way and operate only the tatami surface cutting blade 33 to perform the flat stab.

  In the embodiment described above, the cutting device 3 and the flat stitch sewing machine device 2 are placed on the base 1 so as to be movable in the width direction of the tatami, the base 1 is fixed, and the tatami stand 4 on which the tatami is placed is mounted. The flat sew is sewn by moving in the length direction of the tatami mat, but the tatami table 4 on which the tatami mat is placed is fixed, and the base 1 on which the flat sew sewing machine device 2 and the cutting device 3 are placed is moved in the tatami length direction. However, flat stitching may be performed.

  The flat puncture process described above is based on the habit collected at three measurement points (I, C, H) by the “intermediate measurement method” shown in FIG. ) In the case of performing a flat stab operation based on the habit collected at 5 measurement points (i to e) by the “booth measurement method” shown in FIG. Then, the same flat piercing process can be performed.

1 base
11 rails
12 Habit removal motor 2 Flat stitch sewing machine
21 Sewing needle
22 Rail 3 Cutting device
31 cutting edge
32 Tatami floor cutting tool
33 Tatami mat cutting blade
34 Motor 4 tatami mat 5 tatami mat

Claims (6)

A flat sewing machine that can be moved in the width direction of the tatami mat to be flat-stabbed,
A tatami cutting apparatus including a cutting tool having a stile length interval s between a sewing needle of the flat stab sewing machine and a cutting edge of the cutting tool;
Using a tatami flat sew sewing device comprising means for moving the tatami cutting device in the tatami width direction with respect to the flat sew sewing machine,
At the start of flat stitching, the cutting edge of the cutting blade has a length r = k (s / L) (where k is the deviation of the habit at adjacent measurement points, L is the length from the wrinkle to the measurement point at which the habit is measured) Tatami), which is set at a position farther away from the lower front reference line in the width direction of the tatami mat and performs the stabbing along the planned stabbing line having an inclination (k / L). Flat stitch sewing method. When cutting is completed at a position separated by a deviation δ (including 0) from the lower front reference line on the opposite side,
The sewing machine needle of the flat needle sewing machine performs sewing along a planned sewing line having an inclination {-(k-δ) / L} when the sewing needle reaches the site where the habit is measured. The tatami peculiar sewing method according to 1.     After the sewing needle of the flat needle sewing machine reaches the part where the habit has been measured, while the cutting edge of the cutting blade cuts the distance s to the part where the habit has been measured, the tatami cutting apparatus is applied to the flat needle sewing machine. The tatami garment sewing method according to claim 2, wherein cutting is performed along an inclination {(k / L) + (k-δ) / L}. A flat sewing machine that can be moved in the width direction of the tatami mat to be flat-stabbed,
A tatami cutting apparatus including a cutting tool having a stile length interval s between a sewing needle of the flat stab sewing machine and a cutting edge of the cutting tool;
Using the tatami flat sew sewing device provided with means for moving the flat knitting sewing machine in the tatami width direction with respect to the tatami cutting device,
At the start of flat stitch sewing, the cutting edge of the cutting blade is length r = k (s / L) (where k is the deviation of the habit at adjacent measurement points, L: the length from the heel to the part where the habit was measured) ) Is set at a position away from the lower front reference line in the width direction of the tatami mat, and is flattened along a planed line with a slope (k / L). Stitching method. When cutting is completed at a position separated by a deviation δ (including 0) from the lower front reference line on the opposite side,
5. The cutting according to claim 4, wherein when the cutting edge of the cutting blade reaches a part where the habit is measured, cutting is performed along a planned flat stab line having an inclination {− (k−δ) / L}. How to seize the tatami mat.     After the sewing needle of the flat needle sewing machine reaches the part where the habit is measured, the flat needle sewing machine is attached to the tatami cutting machine while the cutting edge of the cutting blade cuts the distance s to the part where the habit has been measured. The tatami garment sewing method according to claim 5, wherein sewing is performed along an inclination {(k / L) + (k-δ) / L}.

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