JP2005245508A - Tatami mat sewing method and tatami mat sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently utilize a time superiority of manual work by a worker in a sewing process of a tatami mat. <P>SOLUTION: In a sewing process of the tatami mat, a positioning operation of the tatami mat on a tatami mat mount and a reversing operation of the tatami mat are defined as the manual work by the worker (steps S1, S5 and S6) and residual operations are defined as an automatic process by a sewing machine and the like controlled by a control device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tatami stitching method and a tatami stitching machine that reduce the time required to finish tatami mats.

2. Description of the Related Art Conventionally, there are tatami mat sewing methods that have a configuration that is made according to the following procedures (1) to (12).
(1) After a tatami floor (hereinafter simply referred to as tatami) is placed on the tatami mat by the operator, the tatami mat is positioned by the operator and positioned by the tightening bar. It is fixed with respect to the tatami mat.
(2) In this state, a front piercing process is performed in which the sewing machine automatically performs piercing before and after the tatami mat.
(3) After the flat stab step, the fastening bar is released, and in this state, the tatami mat is automatically inverted 180 ° horizontally by the direction changing means provided on the tatami table.
(4) After that, the tatami mat is fixed to the tatami table by the tightening bar through a positioning process in which the tatami mat is automatically positioned with respect to the tatami mat table.
(5) In this state, a front piercing process is performed in which the sewing machine automatically performs piercing before the tatami mat.
(6) During the lower front flat stab step, the tatami is subjected to an edge folding operation for performing an upper front edge folding by the operator.
(7) After completion of the lower front flat stab step and the upper front edge folding operation, the fastening bar is released and in this state, the tatami is automatically inverted 180 ° horizontally again by the direction changing means. The
(8) After that, the tatami mat is fixed to the tatami mat by the tightening bar through a positioning process in which the tatami mat is automatically positioned with respect to the tatami mat.
(9) In this state, when the tatami mat is in an inclined posture, the sewing machine automatically performs the reverse stitching process before and after the tatami mat is carried out, and then the tatami mat is returned to the horizontal posture. The tatami is subjected to an edge folding work for performing a lower front edge folding by the operator.
(10) After the lower front edge folding operation is completed, the fastening bar is released and in this state, the tatami is automatically reversed 180 ° horizontally again by the direction changing means.
(11) After that, the tatami mat is fixed to the tatami mat by the tightening bar through a positioning process in which the tatami mat is automatically positioned with respect to the tatami mat.
(12) In this state, the tatami mat is in an inclined posture, so that the sewing machine automatically performs a reverse stitching process before and below the tatami mat, and then the tatami mat is returned to a horizontal posture. By releasing the fastening of the tightening bar, all the operations and processes in the sewing of the tatami are completed, and the tatami is finished.

A tatami sewing machine used in such a tatami sewing method is called a fully automatic sewing machine with a so-called numerical control device. In this case, an operator first folds a tatami on a tatami table. It is only necessary to perform the manual operation of the operation of placing and the edge folding operation of folding the upper front and lower front edges of the tatami mat after that, and the other processes are performed by an automatic process using a machine. Therefore, even if the worker is not an expert regarding sewing of tatami mats, there is a manufacturing advantage that tatami mats can be finished accurately and uniformly (see, for example, Patent Document 1).
JP 2000-24352 A

  Even in the above-described fully automatic sewing machine, an operator who performs the edge folding work is necessary, but the automatic process of the fully automatic sewing machine is performed manually by the operator, for example, in the tatami positioning process. In other words, a process that is superior in time (can be performed in a short time) is also included. However, in the conventional fully automatic sewing machine, all operations except the first positioning operation and the edge folding operation (upper front and lower front) are automatically performed. For this reason, there is a demand for the development of a sewing machine that can take advantage of the time advantage of manual work by the operator and can shorten the finishing time of the tatami mat.

  The present invention has been made in view of the above circumstances, and its purpose is to provide a time advantage of manual operation by an operator while inheriting the manufacturing advantage of an automatic process in the process of sewing tatami mats. It is an object of the present invention to provide a tatami stitching method and a tatami stitcher capable of fully utilizing the tatami mat, and consequently reducing the finishing time of the tatami mat.

  In order to achieve the above object, the tatami mat sewing method of the present invention includes (1) a positioning operation for positioning a tatami with respect to a tatami mat by an operator, and (2) an edge cloth supply mechanism and a habit removing mechanism. A flat sew process for performing flat sew on the front of the tatami with a sewing machine provided; (3) an edge folding operation for performing edge folding on the front of the tatami by an operator; A tatami mat or the sewing machine in an inclined state, and in this state, a reverse stitching process in which the sewing machine performs reverse stitching with respect to the front of the tatami mat; (5) a reversing operation in which the operator reverses the tatami; and (6) work A positioning operation for positioning the tatami with respect to the tatami mat by the operator, (7) a flat stitching process for performing flat stitching on the lower front of the tatami by the sewing machine, and (8) the tatami mat by the operator. The edge that wraps around the bottom front And (9) performing a reverse stitching process in which the tatami mat or the sewing machine is in an inclined state, and in this state, reverse stitching is performed on the front side of the tatami mat with the sewing machine. 1 invention).

According to this configuration, it is possible to finish the tatami mat while incorporating the manual operation of the operator with respect to both the positioning of the tatami mat (tatami floor) and the inversion of the tatami mat in the tatami sewing process.
Further, a tatami stitching machine for performing the above-described tatami stitching method includes a tatami table on which a tatami can be placed, a flat stitch stitching in a horizontal state of the tatami mat, and reverse stitching in the tatami mat or a self-tilted state. A sewing machine having an edge cloth supply mechanism and a habit removing mechanism, an inclination mechanism that makes the tatami bed or the sewing machine in an inclined state, the sewing machine, the edge cloth supply mechanism, the habit removing mechanism, and And a control means for controlling the tilt mechanism (invention of claim 2).

  According to this structure, the manufacturing superiority in an automatic process can also be inherited.

  As is apparent from the above description, according to the tatami sewing method and tatami sewing machine of the present invention, in the tatami sewing process, while the manufacturing superiority of the automatic process is inherited, the operator It is possible to fully utilize the time advantage of manual work by the method and to obtain an excellent effect that the finishing time can be shortened.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
2 is a plan view of a tatami sewing machine, and FIG. 3 is a side view thereof. 2 and 3, the tatami sewing machine 1 has a pair of frames 2 and 2 installed on the installation surface, and the frame 2 and 2 are orthogonal to the frames 2 and 2. A pair of rails 3 and 3 are provided along the direction of the movement. Among these rails 3, 3, a rectangular plate-like tatami stand 4 is disposed on the upper left side of one rail 3. Although not shown in the figure, the tatami table 4 has a hand stopper for temporary positioning, a front ruler (scale) for accurate positioning, a return positioning ruler, a tatami mat, which are formed to have substantially the same length as the long side of the tatami table 4. Various positioning members such as a return ruler for determining the state of the inclination posture of the table 4 are provided so as to be able to change their positions.

  A tatami mat plate 6 capable of moving up and down or rotating a tatami floor (hereinafter simply referred to as a tatami mat) 5 placed on the tatami table 4 is provided at a substantially central portion of the rectangular tatami table 4. Is provided. The tatami mat placing plate 6 is directly connected to a shaft 6a having a cam mechanism (not shown), and the cam mechanism is locked or unlocked due to the lifting or rotating motion of the shaft 6a. The tatami placement plate 6 is in a non-rotatable state or a rotatable state.

  Further, as shown in FIG. 3, a tilting mechanism 7 is provided between the tatami mat 4 and the frames 2 and 2, and the tilting mechanism 7 is configured so that the tatami mat 4 is indicated by a solid line in FIG. It is configured so that it can be changed to both the horizontal posture shown and the inclined posture shown by a virtual line. Further, as shown in FIG. 4, the tilt mechanism 7 is controlled by pressing and operating a tilt button 7a electrically connected to a control device 8 serving as a control means. The control device 8 is mainly composed of a microcomputer, and is disposed in the frames 2 and 2, for example.

A fixed bar (so-called pusher) 9 is disposed above the tatami table 4 along the long side of the tatami table 4, and the tatami 5 is moved up and down to move the tatami 5 into the tatami table 4. Open or fixed to. As shown in FIG. 4, the fixing bar 9 is controlled by pressing a fixing button 9 a electrically connected to the control device 8.
As shown in FIGS. 2 and 3, the rails 3 and 3 are provided with a sewing machine base 10 that can reciprocate along the rails 3 and 3 in the horizontal direction (vertical direction in FIG. 2). A sewing machine 11 is mounted on the sewing machine base 10. In this case, the sewing machine base 10 is driven by a left / right transfer mechanism 12 (see FIG. 4). The sewing machine 11 is provided with a sewing needle 13, a cutting cutter 14 as a habit removing mechanism, and a thread / border cutter 15 (see FIG. 4). The sewing needle 13 performs flat stitch stitching and reverse stitching, which will be described later, on the tatami 5, and the cutting cutter 14 cuts the upper front or lower front of the tatami 5, and the yarn / border cutter 15 Are each configured to cut an edge fabric and sewing thread, which will be described later.

Further, the sewing machine 11 is provided with an edge cloth supply mechanism 16 formed by winding the above-described edge cloth 17 around a reel 16 a. The edge cloth supply mechanism 16 is moved along with the movement of the sewing machine 11. 17 is sequentially supplied to the upper front or lower front of the tatami 5 so as not to bend or wrinkle.
Further, as shown in FIG. 4, the sewing machine base 10 reciprocates the rails 3 and 3 by the left and right transfer mechanism 12 by pressing the start button 11 a electrically connected to the control device 8. It has become. As a result, the sewing machine 11 can reciprocate along the upper front and lower front of the tatami 5, and can perform flat stitch sewing or reverse stitching with the sewing needle 13 on the upper front and lower front during the forward movement. It has become.

  A front-rear transfer mechanism 18 (see FIG. 4) for reciprocating the sewing machine 11 in the front-rear direction (left-right direction in FIG. 2) is disposed between the sewing machine 11 and the sewing machine base 10. As shown in FIG. 4, a numerical control device 19 is connected to the control device 8, and the control device 8 receives various information about the tatami 5 from the numerical control device 19 (that is, a room in which the tatami is stored). The front / rear transport mechanism 18 is driven on the basis of the dimensions, the wall / floor habit of the room, the size of the tatami mat, and the like, thereby controlling the movement of the sewing machine 11 in the front / rear direction. The various information of the numerical control device 19 is measured and inputted by a measurer before sewing the tatami 5.

Now, the tatami mat sewing machine 1 configured as described above sews and finishes the tatami according to the sewing procedure as shown in FIG.
First, in step S1, the operator places the tatami 5 on the tatami table 4 in a horizontal posture so that the front of the tatami 5 is located on the sewing machine 11 side. Then, the operator puts the tatami 5 on a hand stopper (not shown), moves a table ruler (scale) (not shown) from the standby position to the measurement position, aligns the tatami 5 with this, and performs positioning work. When the operator presses the fixing button 9a, the fixing bar 9 is lowered and presses the tatami 5 so that the tatami 5 is fixed to the tatami table 4.

Next, when the start button 11a is pressed by the operator, the sewing machine base 11 is first moved along the rails 3 and 3 by the left and right transfer mechanism 12 in step S2, so that the sewing machine 11 is also moved to the tatami 5. While moving the forward path along the upper front, the upper and lower flat stitches are performed by the sewing needle 13. The specific contents of this flat stitching process are as follows.
First, when the sewing machine 11 moves as described above, the cutting cutter 14 provided on the sewing machine 11 cuts the front and front into a straight line, and then the edge cloth 17 is moved to the front and front by the edge cloth supply mechanism 16. Supplied without bending and wrinkles. Then, the edge cloth 17 is sewn to the upper front end portion of the tatami 5 by the sewing needle 12. Thereafter, when the sewing machine 11 reaches the vicinity of the end of the tatami 5, the flat stitch is finished, and the sewing thread and the edge cloth 16 are cut by the thread / border cutter 15, and automatically moves in the outward path to return to the original position. It will be in a stop state (end of the previous flat stab process).

  Next, in this state, as step S3, the worker performs the upper and lower edge folding work. This edge folding operation refers to an operation of folding the edge cloth 17 (which also includes a border paper) 17 stitched by flat stitching 180 ° toward the front side of the operator, and includes cornering work. Yes. When the upper front edge folding operation is completed, the operator presses the tilt button 7a shown in FIG. 4 to tilt the tatami stand 4 into the tilted position by the tilt mechanism 7, in other words, tilt the tatami 5 downward. In this state (virtual line in FIG. 3), the tatami mat 5 is stopped and the start button 11a is pressed again.

  When the start button 11a is pressed, in step S4, the sewing machine 11 moves in the forward path along the rails 3 and 3, and the upper and front reverse stitches are performed by the sewing needle 12. When the sewing machine 11 reaches the vicinity of the end of the tatami 5, the upper and front reverse stitches are finished, the sewing thread is cut by the thread / border cutter 15, and the forward path is automatically moved to the stop state at the original position. Become. At this time, the control device 8 automatically returns the tatami table 4 to the horizontal posture by the tilt mechanism 7 and raises the fixing bar 9, thereby releasing (releasing) the tatami mat 5.

At this time, the cam mechanism of the shaft 6a directly connected to the tatami mounting plate 6 is changed from the locked state to the unlocked state due to the fixed release of the tatami 5, and thus the tatami mounting plate 6 is It is raised slightly from the tatami table 4 to be in a rotatable state (end of the upper reverse stitching process).
Then, the operator rotates the tatami 5 on the tatami table 4 (by the tatami mounting plate 6) as step S5. When the tatami mounting plate 6 is rotated approximately 180 ° in the horizontal direction from a position slightly raised from the tatami table 4, it is lowered from the raised position by the cam mechanism and becomes substantially flush with the tatami table 4. It becomes impossible to rotate again.

In step 6, the operator performs the positioning work of the tatami 5 in the same manner as in step 1. Then, the fixing bar 9 is lowered by pressing the fixing button 9 a and pressed against the tatami 5, thereby fixing the tatami 5 to the tatami table 4. Next, after returning the front ruler to the standby position, the operator presses the start button 11a.
When the start button 11a is pressed, in step S7, the sewing machine 11 performs the lower front flat stitch while moving along the rail 3. At this time, the lower front cutting by the cutting cutter 14 is based on various information on the tatami 5 by the numerical control device 19, while the sewing machine 11 moves in the front-rear direction and takes a habit, in other words a slightly meandering locus. It is made while drawing. Since the relative distance between the sewing needle 13 and the cutting cutter 14 is always constant, if the cutting cutter 14 meanders, the sewing needle 13 can also perform flat stitch sewing along the meandering locus. When the sewing machine 11 reaches the vicinity of the end of the tatami 5, the flat stitch is finished, and the sewing thread and the edge cloth 16 are cut by the thread / edge cloth cutter 15, and automatically moves in the outward path at the original position. It will be in a stop state (end of the previous flat stab process).

  Next, in this state, the operator performs a lower front edge folding operation as step S8. This edge folding operation is the same as the upper front edge folding operation of step S3. When the lower front edge folding work is finished, the operator presses the tilt button 7a to bring the tatami 5 into the tilted state again by the tilting mechanism 7 and stops the tatami table 4 in this state. Start button 11a.

  When the start button 11a is pressed, bottom reverse stitching is performed as step S9. This reverse stitching process is the same as the previous reverse stitching process in step S4. When the lower front sewing is completed, the sewing thread is cut by the thread / border cutter 15, and the sewing machine 11 automatically moves in the forward path and stops at the original position. At this time, the control device 8 automatically returns the tatami bed 4 to the horizontal posture by the tilt mechanism 7 and raises the fixing bar 9 to release the fixation of the tatami 5 so that the tatami 5 is finished. .

  According to the embodiment configured as described above, in the process of sewing the tatami 5, the positioning operation of the tatami 5 with respect to the tatami table 4 and the operation of inverting the tatami 5 on the tatami table 4 are performed manually by the operator. Since the operation (steps S1, S5, S6 in FIG. 1) is performed, the tatami mat 5 of the above-mentioned contractor is sewn while inheriting the manufacturing advantage due to the automatic process by the fully automatic sewing machine with a numerical control device. The time advantage resulting from the experience and familiarity with the tatami mat can also be incorporated into the sewing process of the tatami mat 5, and the finishing time of the tatami mat 5 can be shortened.

Furthermore, a mechanism such as a positioning sensor and a tatami direction changing means is not required, and the size of the tatami sewing machine itself and the manufacturing cost of the sewing machine can be reduced, so that the tatami mat has excellent operability and cost. As a result, a high-quality and low-cost tatami mat can be provided to the market.
In the sewing process of the tatami 5, each automatic process is configured to start (start) based on pressing each button (inclination button 7 a or the like). Therefore, each mechanism (sewing machine 11 etc.) constituting the sewing machine 1 starts to move without the operator's knowledge for some reason, and the operator may be injured or the tatami 5 may be damaged. Can be prevented.

In the above embodiment, the front and bottom reverse stitches are performed with the tatami table 4 as an inclined posture, in other words, the tatami 5 as an inclined state. However, the present invention is not limited to this. The above-described reverse stitching may be performed by setting the sewing machine 11 to an inclined posture as a state.
Further, the tilt button 7a, the fixed button 9a, and the start button 11a may be shared by a single button, or all the buttons may be combined and extended by, for example, a cable or the like so as to be arranged at the operator's hand. Good.

  Moreover, you may perform a flat stab process from which the upper front and lower front.

The one example of the present invention, and explanatory drawing of the sewing procedure of tatami Top view of tatami sewing machine Side view of tatami sewing machine Block diagram showing the electrical configuration of a tatami sewing machine

Explanation of symbols

In the drawings, 1 is a sewing machine, 4 is a tatami mat, 5 is tatami, 7 is a tilting mechanism, 8 is a control device (control means), 11 is a sewing machine, 14 is a cutting cutter (curling mechanism), and 16 is an edge cloth. A supply mechanism 19 is a numerical control device.

Claims (2)

(1) Positioning work for positioning the tatami with respect to the tatami mat by the operator;
(2) a flat stitching step of performing flat stitch stitching on the upper front or lower front of the tatami mat with a sewing machine having an edge cloth supply mechanism and a habit removing mechanism;
(3) Edge folding work for performing edge folding on the upper front or lower front of the tatami by an operator;
(4) A reverse stitching process in which the tatami mat or the sewing machine is in an inclined state, and in this state, the sewing machine performs reverse stitching with respect to the upper front or lower front of the tatami mat.
(5) a reversing operation for reversing the tatami by an operator;
(6) Positioning work for positioning a tatami with respect to the tatami mat by an operator;
(7) a flat stitch stitching process for performing flat stitch stitching on the lower front or upper front of the tatami with the sewing machine;
(8) Edge folding work for performing edge folding on the lower front or upper front of the tatami by the operator;
(9) A reverse stitching process in which the tatami or the sewing machine is in an inclined state, and in this state, reverse sewing is performed with respect to the lower front or upper front of the tatami with the sewing machine;
A method for sewing tatami mats, characterized in that A tatami sewing machine for performing the tatami sewing method according to claim 1,
A tatami table on which tatami can be placed;
A sewing machine that can perform flat sew in the horizontal state of the tatami mat and can perform reverse stitching in the tatami mat or a self-tilted state, and has a margin cloth supply mechanism and a habit removing mechanism;
A tilting mechanism for tilting the tatami mat or the sewing machine;
A tatami stitching machine comprising the sewing machine, an edge cloth supply mechanism, a habit removing mechanism, and a control means for controlling the tilt mechanism.

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