JP2002233680A - Tatami sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Tatami (Japanese straw matting) sewing machine which makes the distance between the reference plane of the surface scale and the advancing needle even when thickness of Tatami to be worked varies and easily or automatically move a cutting blade position so as not to change width of Tatami and width of Tatami border even when thickness of Tatami to be worked by the Tatami sewing machine varies. SOLUTION: A surface scale 24 for setting the position of the front upper part of Tatami base is rotatably set on an elevating Tatami presser by a scale arm 23. A cutting blade 12 is manually positioned using a scale showing Tatami thickness and border width and further is constituted so that Tatami thickness is automatically detected and the cutting blade 12 is automatically positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami sewing apparatus which automates the work of sewing an edge to a tatami mat, and more particularly to a tatami sewing apparatus for performing a tatami width cutting finish processing by flattening by numerical control. is there.

[0002]

2. Description of the Related Art By the time a single tatami mat is manufactured, a tatami floor is sewn on a short side (frame portion) of a tatami floor and a tatami mat stretched on the tatami floor. ) Sewn over the tatami table and sewn the edge and underlay paper upside down, before and after cutting the upper and lower front sides of the tatami floor and tatami mat to the width of the tatami mat, A step of folding the paper along the cut surface of the tatami floor, a step of folding the edge and a portion of the lower part of the paper extending from the long side of the tatami along the frame and fixing the staple or thread to the tatami, and Each step of the reverse stitching step of sewing the edge folded back to the lower front side and the lower edge paper on the cut surface of the tatami is required.

[0003] In the flat stab process of sewing the tatami floor and the tatami mat before and after the edges and the lower edge paper are sewn upside down on the tatami mat, the stab at the upper front side (the tatami mats are in contact with each other and are cut linearly). After processing the lower side, the lower front side (the side that is cut along the bend of the sill to be in contact with the sill) is processed.

[0004] The tatami mat 2 is stretched on the tatami floor 1 and the stitching process is completed. As shown in FIG. 3, notches A and B are formed at both ends on the upper front side. The notch is inserted in two notches A
The angle C (see FIG. 3) formed between the straight line connecting the cutouts B and the line of the frame end on the reference side (the side where the tatami mats are in contact) is inserted at a right angle.

As shown in FIG. 1, a flat sew sewing machine 10 having a straight needle 11 and a cutting blade 12 is fastened between a floor support 20 and a tatami mat 21 as shown in FIG.
, The tatami mat 2 is sewn while the tatami mat 2 is sewn, and the tatami floor 1 is cut at the same time.

[0006] After the upper front side and lower front side piercing steps, the edge 3
a and the lower edge paper 3b are folded back, and the edge is sewn to the tatami floor 1 by reverse stitching. FIG. 2 shows a cross section of the tatami mat after flat stab and reverse stitching.

As shown in FIG. 3, the tatami floor 1 with the cutouts A and B at both ends on the upper front side after the frame stitching is finished is stabbed on the flat sewing machine 1.
In accordance with the position of the cutting blade 12 of 0, it is fastened and fixed between the floor support 20 and the tatami mat 21. At this time, the floor support 20
A ruler arm 23 that rotates about fulcrum pins 22 provided at both ends of a floor support 20 in order to adjust the position of the tatami floor 1 with respect to
The position of the tatami floor 1 is adjusted so that the straight line at the lower end of the reference surface 24a of the table ruler 24 attached to the other end of the table and the positions of the notches A and B coincide with each other. The tatami floor 1 is fastened and fixed to the cradle 20. Thereafter, the flat sew sewing machine 10 is operated, and the tatami floor 1 is cut by the cutting blade 12 while sewing with the straight advance needle 11.

After the upper front side stabbing process, the tatami floor 1 is rotated 180 degrees, the lower front side is stabbed to the sewing machine 10 side, and the processed upper front side is pressed by a pressing plate (not shown). The tatami floor 1 is moved to the flat sew sewing machine 10 (cutting blade 12) side so that the cutting start position becomes the designated width dimension D (see FIG. 6), and the floor receiving table 20 and the tatami mat support 21 are moved.
There is known a device for tightening a tatami with a sword and flattening the lower front side.

[0009]

In the flat piercing process,
After aligning the tatami floor 1 in order to process a thick tatami (50-60 mm) conventionally manufactured by the table ruler 24 shown in FIGS. 4 and 5, the demand for thin tatami mats has been increasing rapidly in recent years. When performing alignment for processing the tatami mat, the line at the lower end of the reference surface 24a of the table ruler 24 rises without matching the surface of the tatami floor 1 as shown by a two-dot chain line in FIG. The position of the reference surface 24a is also the cutting blade 12
Out of position.

Further, the cutting blade 12 of the flat stitch sewing machine 10
When laying the finished tatami, it is usually inclined about 4 degrees with respect to the vertical direction to make it easier to lay and to make the gap between the tatami mats less noticeable. However, for this reason, when processing a tatami mat having a large thickness T and when processing a tatami mat having a small thickness t,
Unless the positions of the rectilinear needle 11 and the cutting blade 12 are changed, the thickness of the tatami mat changes, and the dimension changes by the dimension f shown in FIG. Furthermore, after the flat stab process,
The width of the edge in the state where the tatami floor is folded back to cover the tatami floor 1 and finished by reverse stitching is referred to as “edge width e” (see FIG. 2). When the thickness of the tatami mat changes, the edge width e also changes. It is.

In order to adjust the edge width e, the cutting blade 12
Cutting blade moving means 13 and 14 for manually moving the cutting blade 12 relative to the rectilinear needle 11 and a scale plate 15 for indicating the cutting blade 12 after the movement. However, the scale plate 15 indicates not only the edge width e but also the position of the cutting blade 12 as a mere guide, and indicates the relationship between the edge width e and the thickness of the tatami to be processed as described above. Not. Therefore, the thickness of the tatami is measured, and the size of the cutting blade 12 to be moved by the operator is calculated every time, the amount of movement is calculated, and the position adjustment and the edge width of the cutting blade 12 are performed. They had to make adjustments and it was very time-consuming.

[0012] As described above, after the upper front stab operation, the tatami floor is rotated, the lower front side is stabbed toward the sewing machine side, and the processed upper front side is pressed by the pressing machine (cutting blade). On the side, the finishing width is specified width dimension D
(See FIG. 6) In a tatami sewing machine in which a tatami mat is tightened with a floor support and a tatami mat holder after being moved and positioned by being driven and controlled by a computer, a motor, etc. Even if the thickness of the tatami to be processed changes, the distance g between the reference surface of the table ruler and the straight needle (see FIG. 7)
Is constant, and the position of the cutting blade is set so that the width and edge width of the tatami mat (see FIG. 2) do not change even if the thickness of the tatami mat processed in the same tatami sewing apparatus changes. They need to be moved.

[0013]

A first aspect of the present invention for solving the above-mentioned problem is to provide a tatami sewing apparatus for performing a flat piercing process on a tatami floor on which tatami mats have been stretched and sewn on a frame. By providing a tatami mat and a table ruler for positioning the tatami floor on the tatami mat, the distance between the straight needle and the reference surface of the table ruler, which performs flat stabbing even when the thickness of the tatami mat changes, is fixed. The tatami stitching apparatus is characterized in that the tatami stitching apparatus is maintained. According to the present invention, even when the thickness of the tatami mat changes, the table ruler can be used without any problem, and the distance between the straight advancing needle for flat stab and the reference surface of the table ruler can be kept constant.

According to a second aspect of the present invention, there is provided a tatami stitching apparatus for performing a flat stab process on a tatami floor on which tatami mats are stitched, wherein a cutting blade according to a thickness of the tatami mat is provided. By combining the scale provided with the scale indicating the position, the scale provided with the scale indicating the position of the cutting blade according to the edge width, and the scale provided with the reference scale indicating the position of the cutting blade, the thickness of the tatami mat and A tatami sewing apparatus characterized in that a cutting blade position according to an edge width can be easily positioned. According to the present invention, even if the thickness of the tatami mat changes, the position of the cutting blade can be easily adjusted and positioned,
The adjustment of the edge width can be easily performed.

According to a third aspect of the present invention, there is provided a flat stitch sewing machine, wherein a scale, a mark or a mark is provided at the position of the thickness and the edge width of the tatami mat on the basis of the standard. 3. The tatami sewing machine according to claim 2, which can be easily adjusted to a reference position, which is a dependent claim of claim 2, wherein a graduation, a mark or a mark of a position of a reference tatami thickness and an edge width is provided. Thus, the scale and the cutting blade can be easily returned to the reference position.

According to a fourth aspect of the present invention, there is provided a tatami stitching apparatus for performing a flat stab process on a tatami floor on which a tatami mat is stitched, and an input means for inputting a thickness of the tatami to be processed. And a controller for calculating an amount by which the cutting blade is moved based on the input tatami thickness, and means for moving the cutting blade by the calculated moving amount. According to the present invention, it is possible to automate the positioning of the cutting blade, and it is possible to provide a tatami sewing apparatus that is easy to use even for elderly workers who have difficulty reading the scale and for inexperienced workers.

According to a fifth aspect of the present invention, there is provided a tatami stitching apparatus for performing a flat stab process on a tatami floor on which tatami mats are stitched, and a means for detecting a thickness of the tatami mat to be processed. And a controller for calculating an amount by which the cutting blade is moved based on the detected thickness of the tatami mat, and means for moving the cutting blade by the calculated moving amount. According to the present invention, the cutting blade can be automatically positioned even when the thickness of the tatami changes, so that labor saving and efficient production of the tatami can be achieved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The tatami sewing apparatus according to the present invention will be described with reference to FIG. 9. As shown in FIG.
And is rotatable by a fulcrum pin 22. Since the table ruler 24 is provided on the tatami mat holder 21 that moves up and down, the notch A and the notch B
, That is, the distance g between the reference surface 24a of the table ruler 24 and the straight hand 11 can be kept constant. (FIG. 10
reference)

Next, the movement of the cutting blade 12 will be described. The scale 15 for moving the conventional cutting blade 12 is only a guide, and the position adjustment related to the edge width and the thickness of the tatami cannot be performed. By using the scale of the present invention, the edge width and the thickness of the tatami can be easily adjusted. The scale in the present invention is shown in FIG. FIG.
Discloses an embodiment of the scale when the standard of the thickness of the tatami mat is set to 50 mm and the standard of the edge width is set to one dimension. In FIG. 11, the scale portion is shown in a large size in order to easily disclose the installation position of the scale and the like.

There are a scale 16 for thickness adjustment and a scale 17 for edge width adjustment as scales. The scale 16 for thickness adjustment and the scale 17 for edge width adjustment are slidably slid parallel to the direction in which the cutting blade 12 moves. The sewing machine 10 is provided. As a structure for sliding, long holes 16a, 17a and the like are provided in the scale in an appropriate size, and the position is fixed to the flat sew sewing machine 10 with screws 16b, 17b. The screws 16b and 17b can be adjusted more easily by using thumb screws or decorative screws (urea screws or knob bolts) that can be loosened and tightened without using tools. A reference line 12b indicating a position on a blade position scale 12a indicating the position of the cutting blade 12.
Is provided. As described above, the state of FIG. 11 is set when the thickness of the tatami mat is 50 mm and the edge width is one dimension.
Since each of the scales 16, 17, and 12a moves for setting, it is preferable to provide a cutting blade reference position scale (or mark) 10a on the flat-stitch sewing machine 10.
Then, it can be easily returned to the reference position. Further, if the visibility of the reference scale is changed by changing the scale and color of another scale such as red, the usability can be further improved.

The thickness adjusting scale 16 is used to easily adjust the position of the cutting blade 12 even if the thickness of the tatami mat changes, and the thickness of the scale is set to 50 mm in this embodiment. Since the inclination of the cutting blade 12 is 4 °, the dimension f (see FIG. 8) can be calculated by θ = 4 ° with (Tt) tan θ. Therefore, it can be calculated that if the tatami thickness changes by 10 mm, the cutting blade 12 only needs to be moved by 0.699 mm. Therefore, one scale of the thickness adjusting scale 16 is a scale every time the thickness changes by 10 mm. Of course, instead of every 10 mm, it can be a scale corresponding to the change in thickness of 5 mm or any other tatami mat, or even if you create some scales for each change and change it It is good. Further, even if the angle of the cutting blade 12 is changed, it can be calculated by calculating the value of θ with the changed angle.

Referring to the cutting blade 12 actually using a scale, FIG. 11 shows a reference position. The tatami mat has a thickness of 50 mm and an edge width of one dimension. The thickness of the tatami is 30m
When performing the flat stab process of a tatami mat having an edge width of 1 m, first loosen the screw 17 b, and adjust the 1 dimensional scale of the edge width adjusting scale 17 to a position of 30 mm of the thickness adjusting scale 16. As shown in FIG. 12, the scale having one edge width is moved to the left in the figure by two scales of the scale 16 for thickness adjustment. Then, the reference line 12b of the blade position scale 12a is made to match the scale of the above-mentioned one edge width by the cutting blade moving means 13 (the same manual handle as the conventional one). Thus, the position of the cutting blade 12 can be easily and accurately adjusted. This also allows reference line 1
Check the thickness and the edge width indicated by 2b to reduce the tatami thickness to 30
It can be confirmed at a glance that the edge width is set to 1 mm in mm.

Next, a case where only the edge width is changed will be described. A case where the edge width is set to 9.5 minutes while the thickness of the tatami mat remains at 50 mm will be described. In this case, first, screw 16
After loosening a, the 50 mm scale of the thickness adjustment scale 16 is adjusted to the 9.5 minute scale of the edge width adjustment scale 17, and then fixed with the screw 16a. Then, the reference line 12b of the blade position scale 12a is matched with the scale of the edge width of 9.5 by the cutting blade moving means 13 (the same manual handle as the conventional one).

As described above, when the thickness of the tatami mat changes, the position of the edge width adjusting scale 17 is adjusted, and then the position of the cutting blade 12 is adjusted.
Adjust the position of the scale 16 for thickness adjustment, and
The position of 2 is adjusted. When both the thickness and the edge width are changed, a combination of the above procedures is used. The procedure of adjusting the edge width after adjusting the thickness may be performed.

Although the technique in which the operator manually moves and positions the cutting blade 12 has been disclosed above, the automatic positioning of the cutting blade 12 will be described. First, there is a method of measuring the thickness of a tatami by an operator and inputting it to a control device (not shown), or a method of providing a tatami sewing device with a mechanism for detecting the thickness of the tatami. The measurement and input by the operator can be performed by providing an input screen on a control panel (not shown) or the like, so that the details are not particularly described. When a mechanism for detecting the thickness of the tatami is provided in the tatami sewing apparatus, the tatami floor 1 is tightened with the floor support 20 and the tatami support 21. This method can be made relatively inexpensively in terms of structure. When a motor is used as a drive source for raising and lowering the tatami press 21, the ball screws provided at both ends are rotated by the motor, and the rotation can be used to raise and lower the tatami press. It is possible to detect the thickness of the tatami mat by calculating the movement amount by measuring the pulse by adopting or separately installing an encoder. Of course, in order to reduce the error, an origin position reset or the like may be appropriately provided.

When raising and lowering the tatami mat 21 by a driving source such as a cylinder, the linear encoder or the like is
Alternatively, the space between the tatami mat support 21 and the floor cradle 20 when the tatami floor 1 is fixed may be detected by installing the tatami floor 1 on the floor cradle 20 side. In addition, a non-contact type distance measuring sensor may be used, or a method that is inexpensive and has a simple structure may be used. Applicants have been utilizing the technology in this area with a curtain scale elevating hanger of a curtain sewing machine and various other machines before the application. Of course, the thickness of the tatami mat may be measured other than the space between the tatami mat support 21 and the floor support 20, and it goes without saying that this is included in the technical scope of the present invention.

If the thickness of the tatami mat can be detected, the amount of movement of the cutting blade 12 can be calculated by calculating using the thickness. Assuming that the thickness of the reference tatami mat is T (see FIG. 8) and the thickness of the tatami mat to be processed is t, the movement amount is (T−t).
It can be calculated by tan θ. In the present invention, θ = 4 °. When t <T, the cutting blade 12 moves to the left in FIG. 8, and when t> T, it moves to the right. As shown in FIG. 14, the movement of the cutting blade 12 is controlled by a motor. This motor is preferably provided with an encoder such as a servomotor. When a motor without an encoder is used, an encoder is separately installed and the amount of rotation of the motor is counted by a pulse to control the amount of movement of the cutting blade 12. Of course, it goes without saying that a sensor or the like is provided at the origin position or the forward / reverse limit position for control.

As described in detail above, the cutting blade 12
Is moved manually, so the thickness of the tatami is input and the cutting blade 12 is automatically moved. The thickness of the tatami is also automatically calculated, and the cutting blade 12 is automatically moved. You can do that.

[0029]

In the tatami sewing apparatus according to the present invention, since the table ruler is provided on the tatami mat holder for raising and lowering, the reference surface 2 of the table ruler 24 is provided.
It can be prevented that the line at the lower end of 4a rises out of alignment with the surface of the tatami floor 1 and that the position of the reference surface 24a also deviates from the position of the cutting blade 12, so that the tatami mat to be processed can be prevented. The distance g (see FIG. 7) between the reference surface of the table ruler and the rectilinear hand can be kept constant even if the thickness changes.

Further, by using the scale of the tatami sewing apparatus according to the present invention, it is possible to easily adjust the position of the cutting blade 12 and the edge width when the thickness of the tatami is changed. Also, by checking the scale, the current setting of the thickness and edge width of the tatami mat can be checked at a glance.

Further, the positioning of the cutting blade 12 is automated,
Further, it is possible to perform automatic detection of the thickness of the tatami mat, and it is possible to provide a tatami sewing machine that can meet a wide range of needs for an inexpensive device and for aged people who want an automatic machine.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an outline of a conventional flat stab.

FIG. 2 is a cross-sectional view of the tatami mat after sewing is completed.

FIG. 3 is a view for explaining a tatami mat in a state where frame sewing is completed.

FIG. 4 is a perspective view illustrating a conventional table ruler.

FIG. 5 is a side view illustrating a conventional table ruler.

FIG. 6 is a side view for explaining an outline of a conventional flat stab device.

FIG. 7 is a view for explaining a table ruler in a state where the thickness of the tatami has changed.

FIG. 8 is a view for explaining that a finished dimension changes according to the thickness of the tatami mat due to the inclination of the cutting blade.

FIG. 9 is a perspective view illustrating a table ruler of the present invention.

FIG. 10 is a side view illustrating the table ruler of the present invention.

FIG. 11 is a diagram illustrating a scale of the present invention.

FIG. 12 is a diagram illustrating the use of the scale of the present invention.

FIG. 13 is a diagram illustrating the use of the scale of the present invention.

FIG. 14 is a view for explaining an example in which the movement of the cutting blade of the present invention is automated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tatami floor 2 Tatami mat 3a Edge 3b Under edge paper 10 Flat sew sewing machine 10a Cutting blade reference position 11 Straight needle 12 Cutting blade 12a Blade position scale 12b Reference line 13 Cutting blade moving means 14 Cutting blade moving means 15 Scale 16 Thickness adjustment scale 16a long hole 16b screw 17 edge width adjustment scale 17a long hole 17b screw 18 motor 20 floor support 21 tatami mat 22 fulcrum pin 23 ruler arm 24 table ruler 24a reference surface A notch B notch C angle D width e edge Width f Dimensions g Distance between reference surface of ruler and straight hand

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Carayasu Shin 190 Hikago, Tatsuno-cho, Tatsuno-cho, Hyogo Pref. F-term in stock company (reference) 3B150 AA22 BA17 BB00 CC04 CE24 GD14 GD22 LA40 LA88 LB02 NA42 NB12

Claims (5)

[Claims] A tatami stitching device for performing a flat sewn process on a tatami floor on which a tatami mat is stitched and a table ruler for vertically moving the tatami mat and positioning the tatami floor with the tatami mat. The tatami stitching apparatus characterized in that the distance between the straight needle and the reference surface of the ruler for performing a flat stab is kept constant even when the thickness of the tatami mat changes. 2. A tatami stitching apparatus for performing a flat sewn process on a tatami floor on which tatami mats are stitched, and a scale provided with a scale indicating a position of a cutting blade in accordance with a thickness of the tatami mat and an edge width. A scale provided with a scale indicating the position of the corresponding cutting blade,
A tatami sewing apparatus characterized in that a cutting blade position according to a thickness and an edge width of a tatami can be easily positioned by combining with a scale provided with a reference scale indicating a position of the cutting blade. 3. The scale can be easily adjusted to the reference position by attaching a scale or a mark or a mark at the position of the thickness and the edge width of the tatami mat as a reference to the flat-stitching sewing machine. Tatami sewing machine as described. 4. A tatami stitching apparatus for performing a flat sewn process on a tatami floor on which tatami mats are stitched, and an input means for inputting a thickness of a tatami to be processed, and a cutting blade is moved by the input tatami thickness. A tatami sewing apparatus comprising: a control device for calculating an amount to be cut; and means for moving the cutting blade by the calculated movement amount. 5. A tatami stitching apparatus for performing a flat sewn process on a tatami floor on which a tatami mat is stitched, and a means for detecting a thickness of a tatami to be processed, and a cutting blade is moved according to the detected tatami thickness. A tatami sewing apparatus comprising: a control device for calculating an amount to be cut; and means for moving the cutting blade by the calculated movement amount.