JPH1024179A - Double sewing machine for tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly accomplish the changing work of a receiving device between the sewing of a tatami mat with a normal thickness and the sewing of a thin tatami mat by enabling backstitching of the thin tatami mat while allowing the employing of a sewing needle adjusting mechanism and other structures as usual. SOLUTION: This double sewing machine for tatami mats can perform a flat stitch sewing of the rim of a tatami mat horizontally fixed and a backstitching of the rim on the upper end side of the tatami mat fixed being horizontally inclined with a sewing device 10 moving longitudinally along the tatami rim. The sewing device 10 is provided with a receiving device 14 to support the undersurface side of the rim part on the upper end side of the inclined tatami mat during the backstitching. In the receiving device 14, a second receiving member which supports the undersurface of the rim part of the tatami mat in the backstitching of a thin tatami mat with a receiving surface thereof higher than a first receiving member is detachably mounted on the first receiving member which supports the undersurface of the rim part of the tatami mat in the backstitching of the tatami mat with the normal thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual use sewing machine for a tatami mat capable of performing a flat sew sewing operation and a reverse sew sewing operation by a common sewing machine, and more particularly to a receiving device for an edge portion of a tatami mat at the time of a reverse sewing operation.

[0002]

2. Description of the Related Art A conventional dual-purpose sewing machine of this type has been already known as disclosed in, for example, Japanese Patent Publication No. 62-38973. This conventional dual-purpose sewing machine performs back and forth sewing along the tatami edge of the tatami edge of the tatami mat fixed horizontally and reverse sewn at the upper end side of the tatami mat fixed horizontally. It is configured to be performed by a sewing machine moving in a direction. Here, since the sewing needle of the sewing machine also performs flat sewn sewing, it is usually straight.

[0003] In such a dual-purpose sewing machine, reverse stitching is performed as follows.
A substantially vertical sewing needle is inserted obliquely into the edge of the inclined tatami mat. Since the appropriate entry position of the sewing needle differs depending on the thickness of the tatami mat, the entry position of the sewing needle is adjustable. Furthermore, in order to make the piercing position of the sewing machine needle uniform over the entire length of the tatami floor, the sewing machine is provided with a support for supporting the lower surface side of the tatami edge of the tatami floor.

[0004] The general normal thickness of a tatami mat is about 25 mm or more, and the mechanism for adjusting the entry position of the sewing machine needle is designed so that it can be operated within the conventional thickness range.

[0005]

By the way, in recent years, 10
Tatami having a thickness of about 18 mm is being newly demanded.
Such thin tatami mats are often used for applications such as changing a Western-style room to a Japanese-style room by laying it on a floor that has been floored. However, since the conventional dual-use sewing machine described above only supports a tatami mat of about 25 mm or more, it is extremely difficult to perform reverse sewing of a thin tatami mat with a currently used dual-use sewing machine.

Therefore, the present invention improves the receiving device at the edge of the tatami mat at the time of reverse stitching, so that the sewing mechanism for adjusting the sewing needle and other structures can be stitched in the thin tatami mat even when the conventional one is used. It is an object of the present invention to easily and quickly change a receiving tool between sewing a normal thick tatami and sewing a thin tatami mat.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention has taken the following technical means. That is,
The present invention relates to a sewing machine that moves back and forth in a front-rear direction along a tatami edge of a tatami edge of a tatami mat fixed horizontally and a reverse stitch of a tatami edge on an upper end side of a tatami mat fixed horizontally. A tatami double-purpose sewing machine capable of being performed by an apparatus, wherein a receiving device that supports a lower surface side of an upper edge portion of the inclined tatami at the time of reverse stitching is provided in a sewing machine device. A first receiving member that supports the lower surface of the edge of the tatami at the time of reverse stitching of the tatami mat, has a receiving surface higher than the first receiving member, and supports the lower surface of the edge of the tatami at the time of reverse sewing of the thin tatami mat. The two receiving members are configured to be detachably attached.

In the dual use sewing machine according to the present invention, the second receiving member is detached from the first receiving member when sewing a normal thick tatami, and when the thin tatami is sewn. Attach the second receiving member to the first receiving member. Since the receiving surface of the second receiving member is set higher than the first receiving member, the edge of the thin tatami mat is lifted toward the sewing machine needle,
Even if the sewing needle adjustment mechanism does not support thin tatami mats,
It is possible to appropriately perform reverse sewing of a thin tatami mat.

When the second receiving member is mounted, the edge of the tatami mat fixed in an inclined manner is lifted by the second receiving member.
Because the edge portion of such a tatami warps upward, a vertical sewing machine needle can be pierced deeply,
It is possible to improve the reliability of reverse sewing of thin tatami mats in a dual-use sewing machine that fixes the tatami in an inclined shape at the time of reverse stitching, and because only the edges are greatly inclined in this way, the whole is greatly inclined The overall height of the apparatus can be kept low as compared with the above, and the apparatus can be made compact.

The second receiving member is made of a plate material,
By forming a locking piece by bending one end thereof, and providing a locking hole into which the locking piece is inserted in the first receiving member, cost reduction can be achieved with a simple configuration, Since the attaching and detaching operation of the second receiving member need only be performed by inserting the engaging piece into the engaging hole, it can be performed extremely easily and quickly.

Further, the present invention is not limited to the case where the height of the receiving member is adjusted by detachably attaching the separate member as described above, but the tatami mat capable of performing the flat sew sewing and the reverse sewing with a common sewing needle. It is sufficient that the receiving device for supporting the lower surface side of the edge of the tatami mat fixed in an inclined manner at the time of flat sewn is provided so as to be adjustable in height. For example, the receiving member may be configured by one receiving member configured to be able to adjust the height with one touch by an adjusting screw, a cam mechanism, or the like.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The dual-use sewing machine shown in FIG. 1, FIG. 5, or FIG.
Left and right rails 2 and 3 are provided in the longitudinal direction between them. The tatami mats 4 are provided on the pair of frames 1 via arms 5 and the like so as to be freely changeable between a horizontal posture shown by a solid line in FIG. 5 and an inclined posture shown by a two-dot chain line in FIG. A tightening bar 6 is attached to the tatami mat 4 so that the tatami 7 placed on the tatami mat 4 is fastened and fixed to the tatami mat 4 from above.

A sewing machine base 8 is provided on the rails 2 and 3 so as to be able to reciprocate along the tatami table 4 by a conventionally known drive mechanism having a handle 9 and the like. On the sewing machine stand 8,
A sewing machine 10 is provided. This sewing machine 10
Is provided with a straight sewing needle 12 which is moved by a needle driving mechanism 11 so as to perform flat stitching or reverse stitching. The position of the sewing needle 12 with respect to the tatami 7 can be adjusted by a conventionally known left-right position adjusting mechanism (not shown), so that the sewing needle 12 can accommodate tatami mats having various thicknesses. As such an adjusting mechanism,
The horizontal position of the sewing needle 12 with respect to the sewing machine 10 may be changed, and the horizontal position of the sewing needle 12 with respect to the tatami 7 is changed by moving the sewing machine 10 with respect to the sewing machine table 8 in the horizontal direction. It may be something.

The sewing machine stand 8 has a tatami mat 7 at the time of reverse sewing.
A long holding member 27 for holding down the edge of the holding member 27 from above is provided, and a roller 28 for rolling the upper surface of the holding member 27 is provided on the sewing machine device 10 side. Further, the sewing machine device 10 includes a receiving device 13 for supporting the lower surface of the edge of the tatami 7 fixed horizontally as shown by a two-dot chain line in FIG. 1 for flat stitching, and FIG. As shown by the solid line, a receiving device 14 for supporting the lower surface of the edge of the tatami 7 fixed in a laterally inclined shape.
And The flat stab receiver 13 is mounted and fixed on the sewing machine stand 8.

As shown in FIG. 2, a support bracket 15 is provided on the sewing machine stand 8 so as to protrude upward, and a swing arm 17 is attached to the support bracket 15 via a shaft 16 so as to be swingable. By attaching an adjusting pedestal 18 to the distal end of the moving arm 17 and fixing the receiving device 14 for reverse stitching to the adjusting pedestal 18, the receiving device 14 is stored in a position shown by a solid line in FIG. The position can be freely changed to the position.

The adjustment pedestal 18 is fixed to the swing arm 17 by bolts 19. In addition, a projection 20 projecting downward is provided at a base end of the pedestal 18,
An adjustment bolt 21 that is in contact with the side of the protrusion 20 is screwed to the swing arm 17. Therefore, bolt 19
By operating the adjustment bolt 21 by loosening the adjustment base 18, the adjustment pedestal 18 can be swung about the axis of the bolt 19 with respect to the swing arm 17, and the fine adjustment of the angle of the holder 14 can be easily performed. I'm trying to get.

An operation arm 22 for changing the position of the receiving device 14 between the use position and the storage position is provided on the side of the sewing machine 10 so as to be rotatable. That is, a linking arm 24 is provided integrally with a rotation shaft 23 of the operation arm 22, and the tip of the arm 24 and the swing arm 17 are connected via the link 25, and the rotation of the operation arm 22 is performed. The position of the receiving member 14 can be changed by swinging the swing arm 17 by an operation.

The side of the sewing machine 10 is provided with a receiving device 1.
In order to position the operation arm 22 in a state in which the operation arm 4 is in the use position, a lock member 26 is provided which is detachably engaged with the arm 22. The receiving device 14 for reverse sewing includes a first receiving member 30 fixedly mounted on the base 18 and a second receiving member 31 detachably attached to the first receiving member 30. At the time of reverse stitching, the second receiving member 31 is detached, and the lower surface of the edge of the tatami 7 is supported by the first receiving member 30. At the time of thin tatami, the second receiving member 31 is attached to the first receiving member 30 and the second receiving member 31 is attached. Receiving member 31
Thus, the lower surface of the edge of the tatami 7 is supported.

In the present embodiment, the first receiving member 30 is provided with a receiving plate 32 which is formed in a substantially rectangular shape in a side view as shown in FIG. 4B, and is disposed behind the receiving plate 32. Roller 3
3 and a support bracket 33 attached and fixed to the base 18.
It is constituted by integrally supporting by. Also,
The distal end side of the support bracket 33 is formed in a substantially plate shape, and the upper surface thereof is notched in a concave shape, so that a horizontally long locking hole 34 is formed between the support bracket 33 and the receiving plate 32.

The second receiving member 31 is made of a plate material as shown in FIGS. 4 and 5, and has a main body 35 extending substantially the entire length of the first receiving member 30 and one end of the main body 35 bent downward. And a locking piece 36 formed. The left and right width of the locking piece 36 is smaller than the left and right width of the main body 35 and slightly smaller than the left and right width of the locking hole 34. The main body 35 is bent substantially in a letter shape along the side surface shape of the receiving plate 32.
A notch 37 is formed in the middle of the front and back of the sewing machine 1 for the needle 12 to move.

A roller 33 is provided on the lower surface of the main body 35.
The spacer 38 located on the upper side and the spacer 39 located on the receiving plate 32 are fixed by welding, so that the second receiving member 31 can be stably placed on the first receiving member 30. The second receiving member 31 is mounted on the first receiving member 30 by one-touch by inserting the locking piece 36 into the locking hole 34 formed at the distal end of the first receiving member 30 as described above. . The receiving surface (that is, the upper surface) of the second receiving member 31 attached in this manner is higher than the receiving surface of the first receiving member 30 by the height h as shown in FIG. By attaching the second receiving member 31 when performing reverse stitching on a tatami having a small thickness, even when the drive mechanism 11 of the sewing machine needle 12 and the left-right position adjusting mechanism do not correspond to the thin tatami, it is possible to use such a method. By using the dual-purpose sewing machine, it is possible to easily and reliably perform reverse sewing of a thin tatami mat.

That is, a specific description will be given with reference to FIG.
When the first receiving member 30 in the use position is fixed at the position shown in FIG. 3, and the adjustment range of the left-right direction position (entrance position with respect to the tatami mat 7) of the sewing needle 12 is in the range of D1 to D2,
In the case of a normal thickness tatami, appropriate reverse stitching can be performed without attaching the second receiving member 31, but in the case of a thin tatami 7 as shown by a two-dot chain line in FIG. The sewing needle 12 is pierced into the corner, and proper reverse sewing cannot be performed with this.

In the case of the thin tatami mat 7, a second receiving member 31 is attached as shown by a solid line in FIG.
The lower surface of the upper edge of the tatami 7 fixed in an inclined manner by the receiving surface (upper surface) of the tatami 7 is supported, and the edge of the tatami 7 is warped upward so as to be within the adjustment range of the sewing needle 12. To At this time, since the inclination angle of the edge of the tatami 7 is slightly larger, the piercing depth a1 of the sewing machine needle 12 is larger than the piercing depth a2 at the inclined angle when the second receiving member is not attached. As a result, it is possible to reliably perform reverse sewing on a thin tatami mat.

It is particularly desirable to increase the inclination angle of the sewn portion (that is, the edge portion) when the thin tatami mat 7 is reversely sewn. In this embodiment, however, the edge of the tatami mat 7 is formed by the second receiving member. Since only the tatami part is warped and the inclination angle of the entire tatami mat is the same as that of a thick tatami mat, the structure of the tatami mat support device composed of the tatami mat 4 or the like is not complicated, and The height of the tatami mat at the time of the inclination can be reduced as compared with the case where the angle is greatly inclined, so that the whole apparatus can be made compact.

The present invention is not limited to the above-described embodiment, and can be appropriately designed and changed. For example,
In the above embodiment, the first receiving member 30 is provided with the second receiving member 31.
Although the height of the receiving member 14 is adjusted by attaching and detaching the receiving member, it is also possible to mount one receiving member on the pedestal 18 so that the height can be adjusted by adjusting the cam or the screw.

[0026]

According to the dual-use sewing machine of the present invention, the receiving device for supporting the lower surface of the upper edge of the inclined tatami at the time of reverse stitching is provided.
A first receiving member that supports the lower surface of the edge of the tatami mat when performing reverse stitching on a normal thickness tatami has a receiving surface higher than the first receiving member, and supports the lower surface of the edge of the tatami mat when performing reverse stitching on a thin tatami mat. The second receiving member is configured so that it can be detachably attached. Even if the second receiving member is not designed for a thin tatami mat, the second receiving member can be attached to the thin tatami mat. The reverse sewing can be easily performed, and even when a normal thick tatami and a thin tatami are continuously manufactured, the attaching and detaching operation of the second receiving member can be easily and quickly performed, and the workability is improved. It can improve.

Further, in the case where the second receiving member is made of a plate material and one end is bent to form a locking piece, and the first receiving member is provided with a locking hole into which the locking piece is inserted. The structure can be simplified, and the attaching and detaching operation of the second member can be performed extremely easily and quickly. As described above, the receiving device that supports the lower surface side of the edge of the tatami at the time of flat sew sewing is provided so as to be adjustable in height, so even if the adjustment range of the sewing needle does not correspond to a thin tatami, By adjusting the height of the tool, it is possible to perform reverse sewing of a thin tatami mat, and to configure the device of the present invention by replacing the receiving device of a dual-use sewing machine currently manufactured and used. Thus, the introduction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of a state in which a reverse sewn operation of a thin tatami mat is performed by a dual use sewing machine according to an embodiment of the present invention.

FIG. 2 is an enlarged front view showing a mounting link mechanism of a receiving tool of the double-purpose sewing machine.

FIG. 3 is an enlarged front view showing a state in which an edge of a thin tatami mat fixed in an inclined manner is supported by a second receiving member.

FIG. 4A is an enlarged plan view of a second receiving member, and FIG. 4B is a partially broken enlarged side view in a state where the second receiving member is attached to the first receiving member.

FIG. 5 is an overall front view of the double-purpose sewing machine.

FIG. 6 is an overall plan view of the dual-use sewing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sewing machine 14 Receiver 30 First receiving member 31 Second receiving member 34 Locking hole 36 Locking piece

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 6, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Tatami dual-use sewing machine

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual use sewing machine for a tatami mat capable of performing a flat sew sewing operation and a reverse sew sewing operation by a common sewing machine, and more particularly to a receiving device for an edge portion of a tatami mat at the time of a reverse sewing operation.

[0002]

2. Description of the Related Art A conventional dual-purpose sewing machine of this type has been already known as disclosed in, for example, Japanese Patent Publication No. 62-38973. This conventional dual-purpose sewing machine performs back and forth sewing along the tatami edge of the tatami edge of the tatami mat fixed horizontally and reverse sewn at the upper end side of the tatami mat fixed horizontally. It is configured to be performed by a sewing machine moving in a direction. Here, since the sewing needle of the sewing machine also performs flat sewn sewing, it is usually straight.

[0003] In such a dual-purpose sewing machine, reverse stitching is performed as follows.
A substantially vertical sewing needle is inserted obliquely into the edge of the inclined tatami mat. Since the appropriate entry position of the sewing needle differs depending on the thickness of the tatami mat, the entry position of the sewing needle is adjustable. Furthermore, in order to make the piercing position of the sewing machine needle uniform over the entire length of the tatami floor, the sewing machine is provided with a support for supporting the lower surface side of the tatami edge of the tatami floor.

[0004] The general normal thickness of a tatami mat is about 25 mm or more, and the mechanism for adjusting the entry position of the sewing machine needle is designed so that it can be operated within the conventional thickness range.

[0005]

By the way, in recent years, 10
Tatami having a thickness of about 18 mm is being newly demanded.
Such thin tatami mats are often used for applications such as changing a Western-style room to a Japanese-style room by laying it on a floor that has been floored. However, since the conventional dual-use sewing machine described above only supports a tatami mat of about 25 mm or more, it is extremely difficult to perform reverse sewing of a thin tatami mat with a currently used dual-use sewing machine.

Therefore, the present invention improves the receiving device at the edge of the tatami mat at the time of reverse stitching, so that the sewing mechanism for adjusting the sewing needle and other structures can be stitched in the thin tatami mat even when the conventional one is used. It is an object of the present invention to easily and quickly change a receiving tool between sewing a normal thick tatami and sewing a thin tatami mat.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention has taken the following technical means. That is,
The present invention relates to a sewing machine that moves back and forth in a front-rear direction along a tatami edge of a tatami edge of a tatami mat fixed horizontally and a reverse stitch of a tatami edge on an upper end side of a tatami mat fixed horizontally. A tatami double-purpose sewing machine capable of being performed by an apparatus, wherein a receiving device that supports a lower surface side of an upper edge portion of the inclined tatami at the time of reverse stitching is provided in a sewing machine device. A first receiving member that supports the lower surface of the edge of the tatami at the time of reverse stitching of the tatami mat, has a receiving surface higher than the first receiving member, and supports the lower surface of the edge of the tatami at the time of reverse sewing of the thin tatami mat. The two receiving members are configured to be detachably attached.

In the dual use sewing machine according to the present invention, the second receiving member is detached from the first receiving member when sewing a normal thick tatami, and when the thin tatami is sewn. Attach the second receiving member to the first receiving member. Since the receiving surface of the second receiving member is set higher than the first receiving member, the edge of the thin tatami mat is lifted toward the sewing machine needle,
Even if the sewing needle adjustment mechanism does not support thin tatami mats,
It is possible to appropriately perform reverse sewing of a thin tatami mat.

When the second receiving member is mounted, the edge of the tatami mat fixed in an inclined manner is lifted by the second receiving member.
Because the edge portion of such a tatami warps upward, a vertical sewing machine needle can be pierced deeply,
It is possible to improve the reliability of reverse sewing of thin tatami mats in a dual-use sewing machine that fixes the tatami in an inclined shape at the time of reverse stitching, and because only the edges are greatly inclined in this way, the whole is greatly inclined The overall height of the apparatus can be kept low as compared with the above, and the apparatus can be made compact.

The second receiving member is made of a plate material,
By forming a locking piece by bending one end thereof, and providing a locking hole into which the locking piece is inserted in the first receiving member, cost reduction can be achieved with a simple configuration, Since the attaching and detaching operation of the second receiving member need only be performed by inserting the engaging piece into the engaging hole, it can be performed extremely easily and quickly.

Further, the present invention is not limited to the case where the height of the receiving member is adjusted by detachably attaching the separate member as described above, but the tatami mat capable of performing the flat sew sewing and the reverse sewing with a common sewing needle. of a dual stitching machine, as long as the receiving fixture for supporting the lower surface of the edge of the tatami fixed to inclined during return sewing it is provided to be height-adjustable. For example, the receiving member may be configured by one receiving member configured to be able to adjust the height with one touch by an adjusting screw, a cam mechanism, or the like.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The dual-use sewing machine shown in FIG. 1, FIG. 5, or FIG.
Left and right rails 2 and 3 are provided in the longitudinal direction between them. The tatami mats 4 are provided on the pair of frames 1 via arms 5 and the like so as to be freely changeable between a horizontal posture shown by a solid line in FIG. 5 and an inclined posture shown by a two-dot chain line in FIG. A tightening bar 6 is attached to the tatami mat 4 so that the tatami 7 placed on the tatami mat 4 is fastened and fixed to the tatami mat 4 from above.

A sewing machine base 8 is provided on the rails 2 and 3 so as to be able to reciprocate along the tatami table 4 by a conventionally known drive mechanism having a handle 9 and the like. On the sewing machine stand 8,
A sewing machine 10 is provided. This sewing machine 10
Is provided with a straight sewing needle 12 which is moved by a needle driving mechanism 11 so as to perform flat stitching or reverse stitching. The position of the sewing needle 12 with respect to the tatami 7 can be adjusted by a conventionally known left-right position adjusting mechanism (not shown), so that the sewing needle 12 can accommodate tatami mats having various thicknesses. As such an adjusting mechanism,
The horizontal position of the sewing needle 12 with respect to the sewing machine 10 may be changed, and the horizontal position of the sewing needle 12 with respect to the tatami 7 is changed by moving the sewing machine 10 with respect to the sewing machine table 8 in the horizontal direction. It may be something.

The sewing machine stand 8 has a tatami mat 7 at the time of reverse sewing.
A long holding member 27 for holding down the edge of the holding member 27 from above is provided, and a roller 28 for rolling the upper surface of the holding member 27 is provided on the sewing machine device 10 side. Further, the sewing machine device 10 includes a receiving device 29 that supports the lower surface of the edge of the tatami 7 fixed horizontally as shown by a two-dot chain line in FIG. 1 for flat sew sewing, and FIG. As shown by the solid line, a receiving device 14 for supporting the lower surface of the edge of the tatami 7 fixed in a laterally inclined shape.
And The flat stab receiver 29 is mounted and fixed on the sewing machine stand 8.

As shown in FIG. 2, a support bracket 15 is provided on the sewing machine stand 8 so as to protrude upward, and a swing arm 17 is attached to the support bracket 15 via a shaft 16 so as to be swingable. By attaching an adjusting pedestal 18 to the distal end of the moving arm 17 and fixing the receiving device 14 for reverse stitching to the adjusting pedestal 18, the receiving device 14 is stored in a position shown by a solid line in FIG. The position can be freely changed to the position.

The adjustment pedestal 18 is fixed to the swing arm 17 by bolts 19. In addition, a projection 20 projecting downward is provided at a base end of the pedestal 18,
An adjustment bolt 21 that is in contact with the side of the protrusion 20 is screwed to the swing arm 17. Therefore, bolt 19
By operating the adjustment bolt 21 by loosening the adjustment base 18, the adjustment pedestal 18 can be swung about the axis of the bolt 19 with respect to the swing arm 17, and the fine adjustment of the angle of the holder 14 can be easily performed. I'm trying to get.

An operation arm 22 for changing the position of the receiving device 14 between the use position and the storage position is provided on the side of the sewing machine 10 so as to be rotatable. That is, a linking arm 24 is provided integrally with a rotation shaft 23 of the operation arm 22, and the tip of the arm 24 and the swing arm 17 are connected via the link 25, and the rotation of the operation arm 22 is performed. The position of the receiving member 14 can be changed by swinging the swing arm 17 by an operation.

The side of the sewing machine 10 is provided with a receiving device 1.
In order to position the operation arm 22 in a state in which the operation arm 4 is in the use position, a lock member 26 is provided which is detachably engaged with the arm 22. The receiving device 14 for reverse sewing includes a first receiving member 30 fixedly mounted on the base 18 and a second receiving member 31 detachably attached to the first receiving member 30. At the time of reverse stitching, the second receiving member 31 is detached, and the lower surface of the edge of the tatami 7 is supported by the first receiving member 30. At the time of thin tatami, the second receiving member 31 is attached to the first receiving member 30 and the second receiving member 31 is attached. Receiving member 31
Thus, the lower surface of the edge of the tatami 7 is supported.

In the present embodiment, the first receiving member 30 is provided with a receiving plate 32 which is formed in a substantially rectangular shape in a side view as shown in FIG. 4B, and is disposed behind the receiving plate 32. Roller 3
3 and a support bracket 33 attached and fixed to the base 18.
It is constituted by integrally supporting by. Also,
The distal end side of the support bracket 33 is formed in a substantially plate shape, and the upper surface thereof is notched in a concave shape, so that a horizontally long locking hole 34 is formed between the support bracket 33 and the receiving plate 32.

The second receiving member 31 is made of a plate material as shown in FIGS. 4 and 3 , and has a main body 35 extending substantially the entire length of the first receiving member 30 and one end of the main body 35 bent downward. And a locking piece 36 formed. The left and right width of the locking piece 36 is smaller than the left and right width of the main body 35 and slightly smaller than the left and right width of the locking hole 34. The main body 35 is bent substantially in a letter shape along the side surface shape of the receiving plate 32.
A notch 37 is formed in the middle of the front and back of the sewing machine 1 for the needle 12 to move.

A roller 33 is provided on the lower surface of the main body 35.
The spacer 38 located on the upper side and the spacer 39 located on the receiving plate 32 are fixed by welding, so that the second receiving member 31 can be stably placed on the first receiving member 30. The second receiving member 31 is mounted on the first receiving member 30 by one-touch by inserting the locking piece 36 into the locking hole 34 formed at the distal end of the first receiving member 30 as described above. . The receiving surface (that is, the upper surface) of the second receiving member 31 attached in this manner is higher than the receiving surface of the first receiving member 30 by the height h as shown in FIG. By attaching the second receiving member 31 when performing reverse stitching on a tatami having a small thickness, even when the drive mechanism 11 of the sewing machine needle 12 and the left-right position adjusting mechanism do not correspond to the thin tatami, it is possible to use such a method. By using the dual-purpose sewing machine, it is possible to easily and reliably perform reverse sewing of a thin tatami mat.

That is, a specific description will be given with reference to FIG.
When the first receiving member 30 in the use position is fixed at the position shown in FIG. 3, and the adjustment range of the left-right direction position (entrance position with respect to the tatami mat 7) of the sewing needle 12 is in the range of D1 to D2,
In the case of a normal thickness tatami, appropriate reverse stitching can be performed without attaching the second receiving member 31, but in the case of a thin tatami 7 as shown by a two-dot chain line in FIG. The sewing needle 12 is pierced into the corner, and proper reverse sewing cannot be performed with this.

In the case of the thin tatami mat 7, a second receiving member 31 is attached as shown by a solid line in FIG.
The lower surface of the upper edge of the tatami 7 fixed in an inclined manner by the receiving surface (upper surface) of the tatami 7 is supported, and the edge of the tatami 7 is warped upward so as to be within the adjustment range of the sewing needle 12. To At this time, since the inclination angle of the edge of the tatami 7 is slightly larger, the piercing depth a1 of the sewing machine needle 12 is larger than the piercing depth a2 at the inclined angle when the second receiving member is not attached. As a result, it is possible to reliably perform reverse sewing on a thin tatami mat.

It is particularly desirable to increase the inclination angle of the sewn portion (that is, the edge portion) when the thin tatami mat 7 is reversely sewn. In this embodiment, however, the edge of the tatami mat 7 is formed by the second receiving member. Since only the tatami part is warped and the inclination angle of the entire tatami mat is the same as that of a thick tatami mat, the structure of the tatami mat support device composed of the tatami mat 4 or the like is not complicated, and The height of the tatami mat at the time of the inclination can be reduced as compared with the case where the angle is greatly inclined, so that the whole apparatus can be made compact.

The present invention is not limited to the above-described embodiment, and can be appropriately designed and changed. For example,
In the above embodiment, the first receiving member 30 is provided with the second receiving member 31.
Although the height of the receiving member 14 is adjusted by attaching and detaching the receiving member, it is also possible to mount one receiving member on the pedestal 18 so that the height can be adjusted by adjusting the cam or the screw.

[0026]

According to the dual-use sewing machine of the present invention, the receiving device for supporting the lower surface of the upper edge of the inclined tatami at the time of reverse stitching is provided.
A first receiving member that supports the lower surface of the edge of the tatami mat when performing reverse stitching on a normal thickness tatami has a receiving surface higher than the first receiving member, and supports the lower surface of the edge of the tatami mat when performing reverse stitching on a thin tatami mat. The second receiving member is configured so that it can be detachably attached. Even if the second receiving member is not designed for a thin tatami mat, the second receiving member can be attached to the thin tatami mat. The reverse sewing can be easily performed, and even when a normal thick tatami and a thin tatami are continuously manufactured, the attaching and detaching operation of the second receiving member can be easily and quickly performed, and the workability is improved. It can improve.

Further, in the case where the second receiving member is made of a plate material and one end is bent to form a locking piece, and the first receiving member is provided with a locking hole into which the locking piece is inserted. The structure can be simplified, and the attaching and detaching operation of the second member can be performed extremely easily and quickly. As described above, since the bracket as to support the lower surface of the mat edge during sewing return is provided to be height-adjustable, adjustment range of the sewing machine needle need not correspond to tatami thin, bracket as By adjusting the height of the tatami, it is possible to perform reverse stitching of a thin tatami mat, and it is possible to configure the device of the present invention by exchanging a receiving device of a dual-use sewing machine currently manufactured and used. As a result, the introduction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of a state in which a reverse sewn operation of a thin tatami mat is performed by a dual use sewing machine according to an embodiment of the present invention.

FIG. 2 is an enlarged front view showing a mounting link mechanism of a receiving tool of the double-purpose sewing machine.

FIG. 3 is an enlarged front view showing a state in which an edge of a thin tatami mat fixed in an inclined manner is supported by a second receiving member.

FIG. 4A is an enlarged plan view of a second receiving member, and FIG. 4B is a partially broken enlarged side view in a state where the second receiving member is attached to the first receiving member.

FIG. 5 is an overall front view of the double-purpose sewing machine.

FIG. 6 is an overall plan view of the dual-use sewing machine.

DESCRIPTION OF SYMBOLS 10 Sewing machine device 14 Receiver 30 First receiving member 31 Second receiving member 34 Locking hole 36 Locking piece

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

Claims (3)

[Claims] 1. A flat stitch on a tatami edge of a tatami mat fixed horizontally and a reverse sew on a tatami edge on an upper end side of a tatami mat fixed horizontally are moved in the front-rear direction along the tatami edge. A tatami double-purpose sewing machine which can be performed by a sewing machine (10), wherein a receiving device (14) for supporting a lower surface of an upper edge of an inclined tatami at a time of reverse stitching is provided in the sewing machine (10). The receiving member (14) is attached to the first receiving member (30) for supporting the lower surface of the edge of the tatami at the time of reverse sewing of a normal thick tatami mat.
A second receiving member (31) that has a receiving surface higher than the receiving member (30) and supports the lower surface of the edge of the tatami mat when the reversely sewn the thin tatami mat is configured to be detachably attached. Tatami mat for two-purpose sewing machine. 2. The second receiving member (31) is made of a plate material and has one end bent to form a locking piece (36). The first receiving member (30) has the locking piece (36). 3
2. A tatami mat sewing machine according to claim 1, wherein a locking hole (34) into which the 6) is inserted is provided. 3. A tatami double-use sewing machine capable of performing a flat sew stitch and a reverse stitch by a common sewing machine (10),
A dual use sewing machine for tatami mats, characterized in that a receiving device (14) for supporting the lower surface side of the edge of the tatami mat fixed at the time of flat sewn is provided so as to be adjustable in height.