JP2802599B2 - Tatami sewing method - 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 sewing method for sewing a rim while removing the tatami mat.

[0002]

2. Description of the Related Art A flat-stitch sewing machine having a tatami cutting blade, a sewing needle and the like is constructed so as to be able to travel along a tatami table and to be movable in a direction perpendicular to the tatami table. With the running of the main body of the flat-stitching machine in the direction of the tatami mat, the main body of the flat-stitching machine is moved in the direction orthogonal to the tatami mat according to the preset hammering dimension, and the tatami is cut while being cut to the set size. 2. Description of the Related Art A tatami sewing method for wearing a tatami has been conventionally performed.

[0003] In such a conventional tatami sewing method,
The tatami with the upper front side cut and sewn is turned 180 degrees, the lower front side is stabbed to face the sewing machine main body, and when performing the flat sewn sewing while removing the lower front side habit, the tatami is advanced, After the tatami mat is fixed to the tatami mat by aligning the cutting start position of the frame on the sewing start side with the cutting edge of the tatami cutting blade, the flat sew sewing machine body is operated to perform flat sew sewing.

[0004]

As described above, when the flat sewn sewing is started while removing the lower front side habit, the cutting edge of the tatami cutting blade coincides with the cutting start position of the frame, so that the flat sewn stitch is performed. At the start of the operation, the maximum amount of movement of the main body of the flat-stitch sewing machine in the direction orthogonal to the tatami mat based on the state of the habit is unknown. For this purpose, it is necessary to design the flat stitch sewing machine in such a manner that the allowable movement amount of the main body is sufficiently considered in advance.

Accordingly, the present invention has been conceived to minimize the amount of movement of the main body of such a flat sew sewing machine when performing flat sew stitches while removing the habit of tatami mats.

[0006]

SUMMARY OF THE INVENTION A tatami sewing method according to the present invention is a tatami sewing method in which a flat sewn stitch is performed while removing a habit to sew an edge and a lower edge paper under and below a tatami mat.
Based on the input habit data, align the tatami mats with the position of the largest dimension from the top front to the bottom most protruding or the smallest dimension from the top front to the most recessed bottom front as the reference line. Performing the step, matching the cutting blade of the flat sewn sewing machine body to the cutting start position on the tatami frame side, and moving the flat sewn sewing machine main body to remove the habit based on the input habit data. Tatami sewing is performed through the step of performing stab sewing.

[0007]

【Example】

(First Embodiment) As shown in FIGS. 1 and 2, a tatami sewing machine used in a tatami sewing method according to the present invention is a tatami sewing machine in which a flat sew sewing machine body 2 is moved on rails 4. 1 is a device that performs flat sewn sewing on the tatami mat placed on the tatami mat. The reverse stitch sewing machine main body 3 having the thickness adjusting material supply reel 33 shown in FIGS. 1 and 2 is a sewing machine that runs on the same rail 4 and performs reverse stitching.

As shown in the front view of FIG. 3, the flat-stitching sewing machine main body 2 has a flat-stitching sewing machine 21 having a straight advancing needle, a tatami cutting blade 22 for cutting a tatami floor and a tatami front, and an edge supply for supplying an edge 6. A reel 25, a margin paper supply reel 26 for supplying the margin paper 7,
There is provided a cutter 24 for cutting the rim 6 and the lower rim paper 7, and a clamp 28 for temporarily holding the rim 6 and the lower rim paper 7 therebetween.

A well-known sewing machine can be used for the flat stitching machine 21, and the sewing machine can be arranged on either the upper side or the lower side of the tatami mat 5. In the flat sew sewing machine main body 2 shown in FIG. 3, a configuration in which a flat sew sewing machine 21 is disposed above the tatami mat 5 is shown.

The flat sew sewing machine 21 and the tatami cutting blade 22 are configured to be movable in the front-rear direction with respect to the paper surface. 21 moves to the flat stab position, and the cutting blade 22 moves to the tatami cutting position. On the other hand, when the flat stitch sewing machine main body 2 travels to return to the origin, the flat stitch sewing machine 21 and the tatami cutting blade 22 move to a standby position that does not hinder the running.

The clamp 28 and the cutter 24 of the flat-stitching sewing machine body 2 have the structure described in Japanese Patent Publication No. 1-39795, and are provided between two clamping pieces provided at the tip and opened and closed like scissors. Hold the edge 6 and the lower edge paper 7 and clamp 28
Pinch them, and cutter 24 cuts them. The two holding pieces are opened and closed by pistons 28a and 24a. The clamp 28 and the cutter 24 are
It can be moved up and down by 27b. FIG. 3 shows a state at the time of descent. Further, the clamp 28 and the cutter 24 can move in the left and right directions by the piston 27a.

The tatami mat 5 moves while the flat stitch sewing machine body 2 is running.
It enters between the movable guide 29a and the stationary guide 29b. The movable guide 29a is urged upward by a piston from below, and presses the received tatami mat against the stationary guide 29b. The stationary guide 29b is adjusted to the reference height for receiving the tatami mat, and the height of the flat stitch sewing machine 21 or the tatami cutting blade 22,
In addition, the lowering positions of the clamp 28 and the cutter 24 are set.

As shown in the plan view of FIG. 4 and the front view of FIG. 5, the tatami mat stool 1 has a tatami mat 11 on which a tatami mat to be sewn is placed.
And a rotating seat 12 for rotating the tatami by 180 degrees when sewing of one side of the tatami is completed, a tatami mat guide 15 for determining a tatami mat position, and a tatami mat stand
Tatami push bar 16 that pushes the tatami on 11 against tatami guide 15,
Auxiliary tatami pressing device that assists this pressing and removes the habit of tatami
17, a centering means 13 for moving the tatami mat placed on the tatami mat 11 to the center position, and a clamp bar 14 for holding the tatami mat at the time of sewing between the tatami mat 11.

As shown in the side view in FIG. 6, the tatami mat guide 15 maintains the solid line state when positioning the tatami mats, and at the stage where the tatami mating is completed, does not hinder sewing. To the standby position inside the.

The tatami mat push bar 16 advances on the tatami mat 11 toward the guide 15 by the rotation of the screw rod 18, and presses the tatami placed on the tatami mat 11 against the guide 15. The auxiliary folding device 17 is shown in FIG.
As shown in the figure, the inflow of the compressed air causes the piston 19 to protrude.
The tatami mat has a function of pressing a tatami mat with a habit that does not come into contact with the guide 15 to come into contact with the guide 15.

The centering means 13 centers the tatami mat on the tatami mat 11 by rotating the screw bar 41 so that the left and right members 13 advance equally toward the center. The centering means 13 can move on the rail 42 in the direction toward the guide 15 and in the opposite direction.

The rotating seat 12 is rotatable about the shaft 43 with the shaft 43 raised.

Further, the tatami mat 11, the rotating seat 12, the centering means 13 and the tatami mating bar 16 are vertically moved by a shaft 44.
It is possible to rise or fall as a whole.

The clamp bar 14 is moved up and down by a screw rod 45 and holds the tatami mat with the tatami mat 11 and the rotary seat 12. The clamp bar 14 sets the reference height of the tatami mat on which the sewing operation is performed, and the tatami mat 11 and the rotating seat 12 are raised, and the tatami mat is pressed against the clamp bar 14 so that the position of the tatami mat is adjusted to the reference height. Is kept.

The operations of the tatami sewing table 1 and the flat stitch sewing machine main body 2 are controlled by a control device (not shown). The control device controls the operation of each unit according to the habit, dimensions, and the number of tatami mats set by the operator from the input unit.

Next, by the tatami sewing method using this tatami sewing apparatus, the edge and the lower edge paper are automatically sewn to the tatami,
The steps until the tatami mat is completed will be described in order.

(1) Preparation for Machine Operation The edge supply reel 25 around which the edge 6 is wound and the edge paper reel 26 around which the edge paper 7 is wound are set on the flat stitching machine body 2,
The leading edge of the edge 6 and the edge paper 7 extended from each reel are clamped by the clamp 28. In addition, habit to manufacture, dimensions of tatami,
The thickness, the number of sheets, and the like are input from the input unit. These preparations are manually performed by an operator.

(2) Set the tatami mat Set the tatami mat on the tatami floor,
Place on top of 11.

(3) Movement of the tatami mat As shown in FIG. 6, the tatami mat 15 rotates around the support shaft,
Maintain the position of the solid line. Tatami mat 11 by tatami mat push bar 16
Press the upper tatami mat and press the upper front of the tatami mat against the tatami mat guide 15. When the tatami mat is hit against the tatami guide 15, the tatami guide
A plurality of sensors (not shown) provided at 15 detect this and stop the folding push bar 16.

An auxiliary folding device 17 provided on the folding bar 16
The auxiliary tatami depressing device at the position corresponding to the sensor when some of the sensors have detected tatami contact but other sensors have not detected tatami contact
The tatami mat 17 is pressed against the tatami mat guide 15 with a force that does not deform the tatami mat. Further, when pressing the tatami mat with the tatami mat push bar 16, it is also possible to control so that all the auxiliary tatami mating devices 17 operate simultaneously.

(4) Centering of the tatami position Both members 13 of the centering means are tatami guides on rails 42
At the setting position closer to 15, the rotation of the screw rod 41 causes the tatami mats 11 to approach each other toward the center of the tatami mat 11, thereby holding the tatami mats at the center of the tatami mat 11.

(5) Tatami clamp The clamp bar 14 is moved to the reference height from the ground by the rotation of the screw rod 45, and then the tatami mat 11 is raised to lift the tatami, and the tatami is placed between the clamp bar 14 and the tatami mat. Clamp. In the case of flat embroidery, the reference height is set to the upper surface of the tatami mat as the reference surface, and the clamp bar is set so that the upper surface of the tatami mat becomes the reference height.
Set the height of 14. Also, following this reference height,
Tatami fixing guide 29b and sewing machine in flat stitch sewing machine main body 2
21, the height position of the cutting blade 22, the descending position of the cutter 24 and the clamp 28 are set.

After the tatami mat is clamped, the tatami mat 15 is rotated about the support shaft so as not to hinder the sewing operation as shown by the dotted line in FIG. Fits in.

(6) Top-stitching flat sew sewing process The flat-stitching sewing machine body 2 moves on the rail 4 and
When the sewing machine reaches the sewing position of the tatami set in the tatami, the flat-stitch sewing machine 21 and the tatami cutting blade 22 move to the sewing position or the cutting position of the tatami, respectively. The held clamp 28 descends to the height of the tatami fixing guide 29b. (Note that the clamp 28 clamps the edges of the edge 6 and the edge paper 7 at the time of "(1) Preparation for machine operation"). The piston 27a moves to a position on the left side of the flat-stitch sewing machine 21 in FIG. 3 (an initial clamp position).

The tatami mat 5, which has entered between the tatami fixed guide 29b and the tatami movable guide 29a by the running of the flat sewn sewing machine body 2,
It is cut at a predetermined position by a tatami cutting blade 22, and
, The edge 6 and the lower edge paper 7 are sewn. When sewing is continued for a while, the clamp 28 opens the holding piece to release the holding of the rim 6 and the lower edge paper 7, and moves up to a position where it does not interfere with the sewing by the operation of the arm 23. At this time, from the end of the tatami mat, an edge 6 and a lower edge paper 7 having a length corresponding to the distance from the initial clamp position to the flat-stitch sewing machine 21 extend. This extended edge 6 and under-edge paper 7 are used for subsequent cornering (therefore the initial clamping position is set so as to leave the necessary length of edge 6 and under-edge paper 7 for cornering). Is done).

Thereafter, the sewing by the flat stitching machine 21 is continuously performed, and the edge 6 and the lower edge paper 7 are automatically pulled out from the reels 25 and 26 with the sewing.

As the flat stitch sewing machine main body 2 advances on the rails 4, the sewing by the flat stitch sewing machine 21 and the cutting of the tatami mat and the tatami mat by the tatami cutting blade 22 are continuously performed.

(7) Cutting the upper front edge and the lower edge paper When the flat stitch sewing machine 21 is sewn to the other end of the tatami mat, it is detected by a sensor or a limit switch, and the flat stitch sewing machine 21 stops sewing. . The clamp 28 and the cutter 24 move rightward from the stop position of the flat-stitch sewing machine 21 by a distance corresponding to the length of the edge 6 and the under-edge paper 7 necessary for cornering, and then descend, and the clamp 28 is moved down. Clamp the rim 6 and the under-rim paper 7,
Also, the cutter 24 cuts the edge 6 and the lower edge paper 7 leaving a length required for corner stop.

(8) Return of origin of flat sew sewing machine main body 2 The flat sew sewing machine main body 2 retracts the clamp 28 and the tatami cutting blade 22 to the standby position, and holds the leading end of the edge 6 and the lower edge paper 7. After moving the clamp 28 and the cutter 24 to the ascending position, they move on the rail 4 and return to the origin. Also, in the tatami sewing table 1, the clamp bar 14 is raised,
The tatami mat 11 is lowered to release the clamp of the tatami mat, and then the centering means 13 moves on the rail 42 while holding the tatami mat, and carries the tatami mat to the rotary seat 12.

(9) Rotation of the tatami The tatami mat is lifted by raising the rotating seat 12, and is rotated by 180 ° so that the lower front side of the tatami is directed toward the rail 4.

(10) Movement of tatami For example, as shown in FIG. 7, when the habit of the lower front side of the tatami is taken, from the upper front to the lowermost front which is most protruding based on the input habit data. The maximum dimension (d) or the minimum dimension (c) from the upper front to the lowermost bottom is examined.

Then, the tatami mat on the tatami mat 11 is pushed in the direction of the rail 4 by the tatami mat push bar 16, and the maximum dimension (d) from the upper front to the lowermost front is set as a reference line (X ₁ ). Line (X
Push the tatami to ₁ ). At this time, the tatami guide 15 is not used.

(11) Centering of the tatami mat position The centering means 13 moves the tatami mat on the rail 42 to the center after moving on the rail 42 in the direction approaching the sewing position, and then the two members 13 approach each other. Hold.

(12) Tatami clamp The tatami is clamped between the clamp bar 14 and the tatami stand 11 in the same procedure as in "(5) Tatami clamp". After the clamp is completed, (13) Alignment of the flat sewn sewing machine 2 The flat sewn sewing machine 2 is positioned so that the cutting blade 22 of the flat sewn sewing machine 2 matches the cutting start position (X ₃ ) on the tatami frame side. To move back and forth.

(14) Lower front stab sewing process In accordance with the same procedure as in "(6) Flat sew sewing process", the flat sew sewing machine body 2 is moved back and forth based on the pre-input habit of the tatami. The cutting to the finished dimensions and the sewing of the rim and the margin paper are performed while removing the habit.

(15) Cutting the Edge and the Under-Edge Paper The edge and the edge under the edge paper are cut in the same procedure as in “(7) Cutting the edge and the under edge paper”. (16) Return of origin of flat stitch sewing machine main body 2 The flat stitch sewing machine main body 2 returns to the origin in the same procedure as in "(8) Return of origin of flat stitch sewing machine main body 2", and the flat stitch sewing process ends.

After a series of flat sewn processes, the tatami mats laid with flat sewn upper and lower fronts,
Reverse sewing is performed by the reverse sewing machine 3.

(Second Embodiment) In the first embodiment,
In the process of "(10) moving the tatami mat", when removing the habit of the lower front side of the tatami, the maximum dimension (d) from the upper front to the lower front that protrudes the most is set as the reference line (X ₁ ), In the second embodiment, the minimum dimension (c) from the lower front to the lowermost lower front is set as the reference line (X ₂ ), and the tatami mat on the tatami mat 11 is pushed by the tatami mat push bar 16 in the direction of the rail 4; Push the tatami mat to its reference line (X ₂ ). The subsequent steps are the same as steps (9) to (16) of the first embodiment.

[0044]

As is clear from the above description of the embodiments, the tatami sewing apparatus according to the present invention performs flat sewn sewing on a tatami mat on which a frame has been stitched while removing the habit. the position reference line of maximum dimension or minimum dimension of habit (X _1, X ₂₎ After performed positioning of tatami as cutting start position tatami
(X ₃ ) The flat sewn sewing machine body 2 is moved back and forth so that the cutting blades 22 of the flat sewn sewing machine body 2 coincide with each other, and then the flat sewn sewing process starts. the amount is limited to X ₁ to X ₂ (see FIG. 7), it is possible to implement the straightening by little movement.

[Brief description of the drawings]

FIG. 1 is a plan view showing an entire tatami sewing apparatus according to the present invention;

FIG. 2 is a front view showing the entire tatami sewing apparatus of the present invention;

FIG. 3 is a front view of a flat-stitch sewing machine main body in the tatami sewing device shown in FIG. 1;

FIG. 4 is a plan view of a tatami sewing table in the tatami sewing apparatus shown in FIG. 1;

FIG. 5 is a front view of the tatami sewing table shown in FIG. 4;

FIG. 6 is a side view of the tatami sewing table shown in FIG. 4;

FIG. 7 is a principle view showing the principle of the habit removing operation of the tatami mat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tatami sewing stand 2 Flat stitch sewing machine main body 3 Reverse stitch sewing machine main body 4 Rail 5 Tatami 6 Edge 7 Under edge paper 11 Tatami stand 12 Rotary seat 13 Centering means 14 Clamp bar 15 Tatami guide 16 Tatami push bar 18, 41, 45 Screw bar 21 Flat stitch sewing machine 22 Tatami cutting blade

Claims (1)

(57) [Claims] 1. A tatami stitching method in which a flat sewn stitch is performed while removing a habit to sew an edge and a lower edge of a rim under and below a tatami mat, based on input habit data, the most protruding from the upper front. Aligning the tatami mat with the position of the largest dimension up to the bottom of the tatami mat or the position of the smallest dimension from the top front to the bottom of the pit that is the most depressed; A step of matching the cutting blades of the sewing machine main body, and a step of performing flat sew sewing while removing the habit by moving the flat sew sewing machine body based on the input habit data. Sewing method.