JP4943035B2 - Sewing sewing machine - Google Patents

Description

  The present invention relates to an edge stitch sewing machine for performing an edge stitch.

The bead stitch sewing machine is a sewing machine suitable for forming a pocket by sewing a bead cloth on a garment body cloth and forming a predetermined cut in the garment cloth and the bead cloth, for example.
That is, in sewing with the ball stitch sewing machine, on the upper surface of the needle plate, the body cloth and the ball brim cloth are arranged so as to overlap with each other, and the bottom plate portion and the vertical plate portion erected perpendicularly to the upper surface from above. A binder having a T-shaped cross section composed of Furthermore, both ends of the ball edge cloth are held in a state of being folded back from the upper surface of the bottom plate portion of the binder along each plane of the upright plate portion, and each fabric is fed in a predetermined direction by the feed mechanism, while Sewing is performed with two sewing needles on both sides of the plate part. Further, at the time of such sewing, the center knife is moved up and down in synchronization with the vertical movement of the sewing needle to form a linear center cut for forming the opening of the pocket, and then arranged in a substantially V shape. The corner knife is moved up and down from the opening provided in the sewing machine table to form a substantially V-shaped corner cut that is bifurcated so as to continue to both ends of the center cut, and sewing is performed. Yes.
Then, the pocket is formed by returning the ball edge cloth once through the center cut after finishing the sewing.

By the way, conventionally, a corner knife device having a corner knife is provided below a sewing machine table on which a sewing machine body is arranged. Further, the corner knife device needs to perform maintenance such as adjustment of the knife, and in order to facilitate the adjustment work, the corner knife device can be moved from the lower side of the sewing machine table to the outside of the sewing machine table. Proposed.
Specifically, the corner knife device is provided with a rotation fulcrum, and when performing maintenance such as adjustment of the knife, the corner knife device is rotated around the rotation fulcrum and moved from a position below the sewing machine table. The thing of the structure moved to the position of the outer side of a sewing machine table is proposed (for example, refer patent document 1).
JP 2000-107474 A

  However, the conventional edge stitch sewing machine described in Patent Document 1 may cause the corner knife to move up and down at positions other than the operating position below the sewing machine table. There was a problem that the corner knife was damaged due to interference with the table.

  An object of the present invention is to consider the above-described problem, and to provide a bead stitch sewing machine that can prevent the corner knife from being broken except in a normal operating position. That is.

In order to solve the above problems, the invention described in claim 1 has a corner knife that is arranged below the sewing table and rises from an opening provided in the sewing table to form a corner cut in the sewing product. A corner knife device,
A ball provided with a corner knife moving mechanism for moving the corner knife device to an operating position below the sewing machine table where the corner knife can form a corner cut in a sewing object and a maintenance position outside the edge of the sewing machine table. In the edge sewing machine,
The corner knife device can be lifted only when the corner knife device is located at the operating position, and has a rise prevention means for preventing the corner knife from rising when the corner knife device is not located at the operating position.

As described above, according to the first aspect of the present invention, the rising prevention means for allowing the corner knife to be lifted only when the corner knife device is located at the operating position and preventing the corner knife from being raised when the corner knife device is not located at the operating position. Therefore, the corner knife is prevented from being lifted except in the operating position. Thereby, the corner knife can be prevented from being damaged due to the corner knife protruding at a position other than the normal position.
The “outer edge of the sewing machine table” refers to a position away from a region directly below the table when viewed from above the table.

Furthermore, the invention according to claim 1 is characterized in that the ascent prevention means includes a fixing member disposed below the sewing machine table,
When the corner knife device is positioned at the operating position, the corner knife device is positioned at the first position by contact with the fixing member, and when the corner knife device is out of the operating position, the second position is set by separation from the fixing member. A contact member that moves in conjunction with the movement of the corner knife device so as to be located at a position;
The corner knife is connected to the corner knife so as to rise, and when the contact member is located at the second position, the corner knife contacts the contact member to prevent the corner knife from rising. A contact member that is released from contact with the contact member when the contact member is positioned at the first position, and is capable of raising the corner knife;

As described above, according to the first aspect of the present invention, when the corner knife device is located at the operating position, the ascent prevention means is located at the first position by contact with the fixing member, and the corner knife device is located at the operating position. A contact member that moves in conjunction with the movement of the corner knife device so that it is positioned at the second position by being separated from the fixing member when it is separated from the fixed member, and is connected to the corner knife so as to rise as the corner knife rises. When the contact member is located at the second position, the contact member is brought into contact with the contact member to prevent the corner knife from rising, and when the contact member is located at the first position, the contact with the contact member is released. Since the connecting member that enables the corner knife to be raised is provided, the corner knife can be prevented from rising when the corner knife device is not positioned at the operating position with a simple configuration.

  According to the present invention, it is possible to prevent the corner knife from being lifted except at the normal operation position, and as a result, it is possible to provide an edge stitch sewing machine that can prevent the corner knife from being damaged.

Hereinafter, a bead stitch sewing machine 10 according to an embodiment of the present invention will be described with reference to FIGS. However, the scope of the invention is not limited to the illustrated examples.
FIG. 1 is a perspective view showing an overall schematic configuration of a bead stitch sewing machine 10. In this embodiment, the respective directions are determined with reference to the XYZ axes shown in the drawings, and the Z-axis direction coincides with the vertical movement direction of the sewing needle 41 described later, and the sewing operation is performed. The plane is perpendicular to the Z-axis direction, the direction parallel to the work plane and the cloth feeding is taken as the X-axis direction, and the direction parallel to the work plane and perpendicular to the X-axis direction is taken as the Y-axis direction. The X-axis direction is the front-rear direction, the Y-axis direction is the left-right direction, and the Z-axis direction is the up-down direction.

  As shown in FIG. 2, the bead stitch sewing machine 10 sews the bead fabric B with two stitches T parallel to the body fabric M and the cloth feed direction F (see FIG. 1). This is a sewing machine that forms a straight center cut S along the upper left direction in the X-axis direction and a substantially V-shaped corner cut V at both ends of the center cut S.

  The bead-sewn sewing machine 10 moves up and down the machine frame 11 having a sewing machine table 11a as a sewing work table and a plurality of legs 11b that support it, and two sewing needles 41 at the lower end. Cloth feed of a cloth (sewing material) comprising a sewing machine body 12 having a needle bar to be held and disposed on the upper surface of one end side of the sewing machine table 11a, and a body cloth M and a ball cloth B placed on the sewing machine table A body feeding device 20 that feeds in the direction F, a bottom plate portion 31 that is a long flat plate, and a standing plate portion 32 that is erected vertically on the upper surface along the longitudinal direction of the bottom plate portion 31. The binder 30 that holds the ball cloth B from above on the upper side of the fabric M, and the downstream side of the binder 30 in the cloth feeding direction F, and the two sewing needles 41 on both sides of the standing plate portion 32 of the binder 30. Two parallel by vertical movement And a needle vertically moving mechanism for needle (not shown) so that the eye T is formed.

Further, the ball stitching sewing machine 10 is supported by the sewing machine body 12 in the vicinity of the needle bar, and each of the sewing needles 41 on the downstream side in the cloth feeding direction F when the fabrics B and M are fed by the cloth feeding device 20. A center knife mechanism (not shown) that raises and lowers the center knife 51 in the middle of the sewing needle 41 to form a straight center cut S between the two stitches T of the fabrics B and M; Driving means for moving the corner knife 91 up and down (moving up and down), disposed downstream of the cloth feeding direction F by the cloth feeding device 20 and below the sewing machine table 11a, and fed by the cloth feeding device 20 to be sent to the corner. The longitudinal direction of the center cut S is made by raising the corner knife 91 with respect to the fabric located above the knife 91 and projecting it from the opening 11c provided in the sewing machine table 11a. A corner knife device 90 to form a substantially V-shaped corner cut V in succession the outer position, a motion control unit for controlling the above units and a (not shown).

Next, the corner knife device 90, the corner knife moving mechanism 60 that moves the corner knife device 90 to the operating position below the sewing machine table 11a and the maintenance position outside the edge of the sewing machine table, and the corner knife device 90 are not positioned at the operating position. The rise prevention mechanism 70 as a rise prevention means for preventing the corner knife 91 from rising sometimes will be described in detail.
3 to 5 are views showing the corner knife device 90, the corner knife moving mechanism 60, and the rise prevention mechanism 70. FIGS. 6 and 7 are enlarged views of the rise prevention mechanism 70. FIG.

As shown in FIG. 1, the corner knife device 90 is arranged below the sewing machine table 11 a and in the passage of the large pressers 21 and 21 by the cloth feeding device 20, and the balls conveyed by the cloth feeding device 20. By inserting the corner knife 91 into the edge cloth B and the body cloth M from below, a substantially V-shaped corner cut V is formed at the positions corresponding to both ends of the center cut S.
That is, the corner knife device 90 includes two corner knives 91, 91 arranged at intervals along the cloth feeding direction F, and driving means for moving each corner knife 91 up and down via a predetermined power transmission mechanism. As cylinders 92 and 92.

Each corner knife 91 is composed of a pair of triangular knifes arranged so that the shape seen from the tip side is V-shaped, and is attached to the cylinder rod 94 of the cylinder 92 with the tip part facing upward. Connected and supported.
The two corner knives 91 are supported so that the openings of the substantially V-shaped corner cuts V formed by the two corner knives 91 are opposite to each other. In addition, the interval between the two corner knives 91 can be adjusted.
In the corner knife device 90, when the fabrics B and M in which the two stitches T and the center cut S are formed are conveyed by the cloth feeding device 20 to a position directly above the corner knife device 90, Two corner knives 91 are moved up and down at both ends of the center cut S to form two substantially V-shaped corner cuts V in the fabrics B and M.

  Further, at a predetermined position near the corner knife device 90, the corner knife device 90 is shown in FIG. 4 from the operating position below the sewing machine table 11a when performing maintenance such as maintenance and adjustment of the knife on the corner knife device 90. A corner knife moving mechanism 60 for pulling out to the outside maintenance position where such work is easy to perform is provided. The corner knife moving mechanism 60 includes a first guide member 61 disposed in the machine casing 11 and a second guide member 62 disposed in the corner knife device 90. The first guide member 61 and the second guide The member 62 is fitted and functions as the corner knife moving mechanism 60.

  The first guide member 61 is a long plate-like member, and the longitudinal direction is the sewing table 11a on both sides in the X-axis direction of the frame body that holds the entire corner knife device 90 below the sewing table 11a of the machine frame 11. Are arranged so as to be substantially parallel along the left-right direction (Y-axis direction). The first guide member 61 includes at least two (two) in the front-rear direction (X-axis direction) of the sewing machine table 11a. The first guide member 61 is fitted with the second guide member 62 so that the corner knife device 90 is attached to the sewing machine table 11a. It arrange | positions so that it can pull out in the left-right direction (this embodiment front side or lower side in a Y-axis direction).

Similar to the first guide member 61, the second guide member 62 is a long plate-like member, and at least two (2) in accordance with the number of the first guide members 61 on both side surfaces of the frame body of the corner knife device 90 ( 2), is provided extending vertically on both side surfaces of the corner knife device 90, is connected to a plate-like member 93 that supports each component of the corner knife device 90, and the longitudinal direction of the sewing machine table 11a The first guide member 61 and the first guide member 61 are arranged so as to move linearly in parallel with the left-right direction (Y-axis direction).
The corner knife device 90 is supported by the machine casing 11 via the first guide member 61 and the second guide member 62 fitted as described above, and further, the second guide member 62 is supported with respect to the first guide member 61. Is slid linearly in the Y-axis direction. As a result, the corner knife device 90 is linearly moved via the first guide member 61 and the second guide member 62, and at least until the corner knife 91 reaches the outside of the edge of the sewing machine table 11a, the sewing machine is viewed from below the sewing machine table 11a. It can be pulled out along the left-right direction to the outside of the table 11a (in this embodiment, the front side or the lower side in the Y-axis direction). Further, the corner knife device 90 is pulled out by using the first guide member 61 and the second guide member 62 on the front side in the pull-out direction of the corner knife device 90 (on the front side in the Y-axis direction in FIGS. 3 and 4). A handle 63 is provided so that it can be easily pulled out.

The corner knife device 90 is fixed at the operating position by a lock member (not shown) when the corner knife device 90 is located below the sewing machine table 11a and is in an operating position capable of forming a V-shaped cut on the ball cloth B and the body cloth M. When the corner knife 91 is linearly moved by the first guide member 61 and the second guide member 62 and pulled out to the maintenance position where the corner knife 91 is located outside the sewing machine table 11a (outside the edge of the sewing machine table 11a). In addition, a stopper (not shown) is provided to prevent movement in the pull-out direction so that no further pull-out is performed. After the operator releases the lock by the lock member described above, the operator maintains the corner knife device 90 from the operating position. The corner knife device 90 can be adjusted by pulling it out to the position.
Regarding the configuration of the guide member 60, it is possible to slide between the first guide member 61 and the second guide member 62, such as a structure in which balls and rollers are interposed, a structure in which the guide member 60 is slid between each other, and the like. Various guide structures may be employed.

  Further, the corner knife device 90 and the corner knife moving mechanism 60 of the present embodiment position the two corner knife 91 on the foremost side in the front-rear direction (X-axis direction) in the sewing machine table 11a as shown in FIGS. Only when it is made to move, it can move between the operating position and the maintenance position. Specifically, for example, the corner knife 91 cannot pass through the back side of the sewing machine table 11a between the operating position of the corner knife device 90 and the edge of the sewing table 11a in the left-right direction (Y-axis direction). There may be a case where ribs are provided and the ribs are not provided only on the forefront side in the front-rear direction (X-axis direction) of the sewing machine table 11a.

  The corner knife device 90 can be raised (moved up and down) at a predetermined position of the corner knife device 90 only when the corner knife device 90 is in the operating position, and the corner knife device 90 is positioned at a position other than the operating position such as the maintenance position. In some cases, a rise prevention mechanism 70 is provided as a rise prevention means for preventing the corner knife 91 from rising (up and down movement). In the present embodiment, the rising prevention mechanism 70 is provided in the vicinity of the corner knife moving mechanism 60 disposed on the front side in the front-rear direction (X-axis direction) of the sewing machine table 11a of the corner knife device 90.

  As shown in FIGS. 6 and 7, the ascent prevention mechanism 70 of this embodiment includes a connecting member 71 and a contact member 72. The connecting member 71 is a substantially rectangular member connected to the cylinder rod 94 of the cylinder 92 so as to rise as the corner knife 91 rises. When the abutting member 72 described later is located at the ascent prevention position, the abutting member 72 is prevented from rising of the corner knife 91, and when the contact member 72 is located at the release position, the contact with the contact member 72 is released and the corner knife 91 can be raised. Yes. In the present embodiment, an insertion hole is provided in the vicinity of the center of the connecting member 71 so that the cylinder rod 94 of the cylinder 92 can be inserted just through the cylinder rod 94. The connecting member 71 is connected to the corner knife 91 by locking the rod 94.

The abutting member 72 includes a rod-like member 72a extending in a substantially horizontal direction and a plate-like moving member 72b connected to one end of the rod-like member 72a substantially vertically by screwing. A protruding contact portion 73 is provided at the position. The contact member 72 is movable by a predetermined amount in the front-rear direction (X-axis direction) of the sewing machine table 11a (details will be described later). When the corner knife device 90 is located at the operating position, the contact member 72 is as shown in FIG. The corner knife is located at the release position (first position) as shown, and when the corner knife device 90 is out of the operating position, the corner knife device 90 is located at the ascending prevention position (second position) as shown in FIG. It moves in conjunction with the movement of the device 90.
Further, the right side of the moving member 72b in the Y-axis direction in FIG. 6 is bent outward by a predetermined amount. Further, in the abutting member 72, the moving member 72b is attached to the plate-like member 93 of the corner knife device 90 via an attachment member 77 such as a screw and an urging member 78 such as a spring. 93 is energized. Further, a rotation preventing member 76 configured to protrude from the plate-like member 93 is provided so that the moving member 72 b does not rotate about the attachment member 77.

  A sheet metal-like fixing member 75 is attached to a portion below the sewing machine table 11a that is not moved by the corner knife moving mechanism. In this embodiment, a substantially L-shaped member is attached to the back surface of the sewing machine table 11a as the fixing member 75, and the tip of the fixing member 75 is moved by the movement of the corner knife device 90 by the corner knife moving mechanism 60. It is comprised so that it can contact | abut to the said bending part of 72b.

  When the corner knife device 90 is located at the operating position, as shown in FIG. 7B, the corner knife device 90 is located at the release position (first position) where the fixed member 75 comes into contact with the moving member 72b of the contact member 72. The moving member 72b urged to the sheet metal 93 side of the corner knife device 90 by the mounting member 77 and the urging member 78 is moved in the direction away from the sheet metal 93 by the contact of the fixing member 75, thereby moving the moving member. The rod-like member 72a attached substantially perpendicularly to the 72b is in a state in which it slides a predetermined amount in the front direction X1 in the front-rear direction (X-axis direction) of the sewing machine table 11a. As a result, the contact portions 73 and 73 of the contact member 72 are disengaged from the upper portions of the connecting members 71 and 71, respectively, to be in the release position, and the corner knife 91 can be raised.

  Further, when the corner knife device 90 is not located at the operating position, the moving member 72b of the contact member 72 is located at the ascending prevention position (second position) where it is separated from the fixed member 75, as shown in FIG. The moving member 72b is urged toward the sheet metal 93 side of the corner knife device 90 by the attachment member 77 and the urging member 78, whereby the rod-like member 72a attached to the moving member 72b substantially vertically The table 11a is slid by a predetermined amount in the rear direction X2 in the front-rear direction (X-axis direction). As a result, the contact portions 73 and 73 of the contact member 72 come into contact with the upper portions of the connecting members 71 and 71 to be in the ascent prevention position, and the corner knife 91 cannot be raised.

In addition, as a raise prevention mechanism of this invention, it is not restricted to the structure of the raise prevention mechanism 70 of this embodiment, The thing of another structure may be sufficient.
For example, as shown in FIG. 8, the contact portion of the contact member may be a rod-shaped member. Details will be described below.
As shown in FIG. 8A and FIG. 8B, the rising prevention mechanism 170 includes a connecting member 171 and a contact member 172. The connecting member 171 is a substantially rectangular member connected to a cylinder rod 194 of a corner knife cylinder (not shown) so as to rise as the corner knife rises. When the contact member 172 is positioned, the contact with the contact member 172 is prevented to prevent the corner knife from rising, and when the contact member 172 is located at the release position, the contact with the contact member 172 is released to allow the corner knife to be raised. It is like that.

The contact member 172 includes a rod-shaped member 172a extending in a substantially horizontal direction and a moving member 172b coupled to one end portion of the rod-shaped member 172a approximately by screwing. The bar-shaped member 172a of the contact member 172 is movable by a predetermined amount in the left-right direction (Y-axis direction) on the sewing machine table (details will be described later), and when the corner knife device is located at the operating position, FIG. ) Is located at the release position (first position) as shown in FIG. 8B, and when the corner knife device is out of the operating position, the corner is located at the ascending prevention position (second position) as shown in FIG. It moves in conjunction with the movement of the female device.
The bar-shaped member 172a of the contact member 172 is attached to the sheet metal-shaped moving member 172b substantially vertically via a substantially arc-shaped contact member insertion hole 176 formed in the plate-shaped member 193 of one corner knife device. Yes. Further, the moving member 172b is formed to be rotatable about the rotation shaft 179 along the contact member insertion hole 176, and the longitudinal direction is usually set to the Z-axis direction by an urging member 178 such as a spring. Is being energized. A projecting portion 177 projecting in a flange shape is formed below the moving member 172b.

  Further, a sheet metal-like fixing member 175 is attached to a portion that is not moved by the corner knife moving mechanism below the sewing machine table. In this embodiment, a substantially L-shaped member is attached to the back surface of the sewing machine table as the fixing member 175, and the distal end portion of the fixing member 175 is a protruding portion of the moving member 172b by the movement of the corner knife device by the corner knife moving mechanism. 177 is configured to be able to abut.

  When the corner knife device is located at the operating position, as shown in FIG. 8B, the fixing member 175 comes into contact with the protruding portion 177 of the moving member 172b, and the longitudinal direction of the rotating shaft 179 and the urging member 178 is changed. The moving member 172b biased so as to be in the Z-axis direction rotates, and the rod-shaped member 172a attached to the moving member 172b via the contact member insertion hole 176 rotates in a direction away from the connecting member 171. It has become a state. Thereby, the rod-shaped member 172a of the contact member 172 is released from the upper portion of the connecting member 171, and is in a state where the corner knife can be raised.

Further, when the corner knife device is not located at the operating position, as shown in FIG. 8A, the moving member 172b of the contact member 172 is separated from the fixed member 175, and the moving member 172b is attached to the rotating shaft 179 and the attached member. The bar member 172a attached to the moving member 172b via the contact member insertion hole 176 is positioned above the connecting member 171. It is in a state. As a result, the contact member 172 comes into contact with the upper portion of the connecting member 171 to be in the rise prevention position, and the corner knife cannot be raised.
When the rising prevention mechanism 170 has such a configuration, if the rod-shaped member 172a is made long, the connecting member 171, that is, the corner knife can be prevented from being lifted and released regardless of the position of the corner knife device. It can be adapted to corner knife devices of various configurations.

Moreover, as a raise prevention mechanism, the thing as shown in FIG.9 and FIG.10 may be used. Here, as shown in FIG. 9, the ascent prevention mechanism 270 includes a connecting member 271 connected to a cylinder rod 294 of a corner knife cylinder (not shown) and an air attached to a plate member 293 of the corner knife device. The contact member 272 is movable in the Y-axis direction by a cylinder 273.
Further, as shown in FIG. 10, a mechanical valve 280 is provided as a driving means for the ascent prevention mechanism 270, and the corner knife moving mechanism 260 causes the corner knife device 290 to move from the maintenance position (chain line position) to the operating position (solid line position). ), The mechanical valve 280 comes into contact with a predetermined wall surface so that air flows into the valve, so that the air cylinder 273 operates and the corner knife can move up the contact member 272. It is moved to the release position (the position indicated by the solid line in FIG. 9).
Further, when the corner knife device 290 is separated from the operation position (solid line position) to the maintenance position (chain line position) by the corner knife moving mechanism 260, the inside of the valve of the mechanical valve 280 that is in contact with a predetermined wall surface. The air cylinder 273 is activated to move the contact member 272 to a position where the corner knife cannot be raised.

  Furthermore, in the present embodiment, the corner knife moving mechanism 60 is configured to slide the corner knife device 90 in parallel, and the corner knife device 90 having such a configuration is provided with a rising prevention mechanism. This is not a limitation. For example, as illustrated in FIGS. 11 and 12, a configuration in which a rise prevention mechanism 370 is provided in a corner knife device 390 including a rotary corner knife moving mechanism 360 may be employed. Details will be described below.

  The corner knife device 390 can be raised (vertically moved) at a predetermined position of the corner knife device 390 only when the corner knife device 390 is located at the operating position, and the corner knife device 390 is located at a position other than the operating position such as the maintenance position. In some cases, a rise prevention mechanism 370 is provided as a rise prevention means for preventing the corner knife 391 from rising (up and down movement). Here, an elevation preventing mechanism 370 is provided in the vicinity of the front side in the front-rear direction (X-axis direction) of the sewing machine table 311a of the corner knife device 390.

  As shown in FIGS. 11 and 12, the ascent prevention mechanism 370 includes a connecting member 371 and a contact member 372. The connecting member 371 is a substantially rectangular member connected to a cylinder rod 394 of a cylinder (not shown) so as to rise as the corner knife 391 rises, and a contact member 372, which will be described later, is located at the rise preventing position. When the contact member 372 is in contact, the corner knife 391 is prevented from rising, and when the contact member 372 is located at the release position, the contact with the contact member 372 is released and the corner knife 391 can be raised. It is supposed to be.

The contact member 372 includes a rod-shaped member 372a extending in a substantially horizontal direction and a moving member 372b coupled to one end portion of the rod-shaped member 372a by a screw substantially perpendicularly, and protrudes at a predetermined position of the rod-shaped member 372a. A contact portion 373 having a shape is provided. The rod-shaped member 372a is movable by a predetermined amount in the longitudinal direction (details will be described later), and when the corner knife device 390 is in the operating position, the release position (first position) as shown in FIG. ) And moves in conjunction with the movement of the corner knife device 390 so that the corner knife device 390 is positioned at the ascending prevention position (second position) as shown in FIG. It is supposed to be.
Further, the upper side of the moving member 372b in the Y-axis direction in FIG. 12B is bent outward by a predetermined amount. Furthermore, the moving member 372b is attached to the plate-like member 393 in the corner knife device 390 via an attachment member 377 such as a screw and an urging member 378 such as a spring, and is normally urged by the sheet metal 393. Has been.

  A sheet metal-like fixing member 375 is attached to a portion that is not moved by the corner knife moving mechanism such as the sewing machine table 311a. In this embodiment, a substantially L-shaped member is attached as the fixing member 375, and the distal end portion of the fixing member 375 is bent by the bending member 372b by the rotational movement of the corner knife device 390 by the corner knife moving mechanism 360. It is comprised so that contact | abutment is possible.

  When the corner knife device 390 is in the operating position, as shown in FIG. 12B, the fixed member 375 comes into contact with the moving member 372b, and the sheet metal of the corner knife device 390 is attached by the mounting member 377 and the biasing member 378. The moving member 372b biased toward the 393 side moves in a direction away from the sheet metal 393 due to the contact of the fixed member 375, whereby the bar-like member 372a attached to the moving member 372b substantially perpendicularly moves to the sewing machine table 311a. In the front-rear direction (X-axis direction) in FIG. As a result, the contact portions 373 and 373 of the bar-shaped member 372a are released from the upper portions of the connecting members 371 and 371, respectively, so that the corner knife 391 can be lifted.

When the corner knife device 390 is not located at the operating position, as shown in FIG. 12A, the moving member 372b of the contact member 372 is separated from the fixed member 375, and the moving member 372b is attached to the mounting member 377 and The urging member 378 is urged toward the sheet metal 393 side of the corner knife device 390, whereby the rod-like member 372a attached substantially vertically to the moving member 372b is located in the substantially left direction X4 of FIG. It is in a state of moving the fixed amount slide. As a result, the contact portions 373 and 373 of the bar-shaped member 372a abut on the upper portions of the connecting members 371 and 371, respectively, so as to prevent the corner knife 391 from rising.
In this way, the rotation-type corner knife moving mechanism can also be provided with a rise prevention mechanism and function.

As described above, according to the bead stitch sewing machine of this embodiment, the corner knife can be raised only when the corner knife device is located at the operating position, and the rise prevention that prevents the corner knife from being raised when not located at the operating position. Because of the means, the corner knife is prevented from being lifted outside the operating position. As a result, the corner knife and other parts of the sewing machine can be prevented from being damaged due to the corner knife protruding outside the normal position.
Further, in the present embodiment, the ascent prevention means is located at the first position when the corner knife device is located at the operating position, and is located at the second position when the corner knife device is out of the actuation position. A contact member that moves in conjunction with the movement of the corner knife device, and is connected to the corner knife so as to rise as the corner knife rises. When the contact member is located at the second position, the contact member contacts the contact member. Since it includes a connecting member that prevents the corner knife from rising and releases the contact with the contact member when the contact member is located at the first position, the corner knife can be raised. When the corner knife device is not in the operating position, the corner knife can be prevented from rising.
Further, in the present embodiment, the contact member moves between the first position and the second position by the driving means that is driven based on a mechanical valve that opens and closes depending on whether or not the corner knife device is located at the operating position. With this configuration, the contact member can be moved reliably in conjunction with the movement of the corner knife device.

  Of course, the present invention is not limited to the above-described embodiment and can be modified as appropriate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall schematic configuration of an edge stitch sewing machine according to a preferred embodiment to which the present invention is applied. It is explanatory drawing which shows the relationship of the linear cut | interruption by a center knife, the cut by a corner knife, and the arrangement | positioning of the stitch by two sewing needles. It is a perspective view which shows the corner knife apparatus with which the bead stitch sewing machine of FIG. 1 is equipped. It is a perspective view which shows the state which pulled out the corner knife apparatus with which the bead stitch sewing machine of FIG. 1 was equipped from the sewing machine table lower part. FIG. 5 is a top view of FIG. 4. It is an expansion perspective view which shows the raise prevention mechanism vicinity in the corner knife apparatus with which the bead stitch sewing machine of FIG. 1 is equipped. (A) The figure which shows the state by which the raising of the corner knife was blocked | prevented by the raising prevention mechanism, (b) The figure which shows the state by which the raising prevention of the corner knife by the raising prevention mechanism was cancelled | released. (A) The figure which shows the state by which the raising of the corner knife was blocked in the other example of a raising prevention mechanism, (b) The figure which shows the state by which the raising prevention of the corner knife was cancelled | released in the other example of a raising prevention mechanism . It is a figure which shows the further another example of a raise prevention mechanism. It is a figure for demonstrating opening and closing of a mechanical valve. It is a figure which shows the rotation type corner knife moving mechanism and the raising prevention mechanism with which it was equipped. (A) The figure which shows the state by which the raising of the corner knife was blocked in the other example of a raising prevention mechanism, (b) The figure which shows the state by which the raising prevention of the corner knife was cancelled | released in the other example of a raising prevention mechanism .

Explanation of symbols

10 Sewing machine 11 Machine frame 11a Sewing table 11b Leg 12 Sewing machine body 13 Needle plate 20 Cloth feed device 21 Large presser 22 Support body 30 Binder 31 Bottom plate portion 32 Standing plate portion 41 Sewing needle 51 Center knife 60 Corner knife moving mechanism 90 Corner knife device 91 Corner knife 61 First guide member 62 Second guide member 63 Handle 70 Lift prevention mechanism (rise prevention means)
71 Connecting member 72 Contact member 280 Mechanical valve B Ball edge cloth M Body cloth S Center cut V Corner cut T Seam F Cloth feed direction

Claims (1)

A corner knife device having a corner knife arranged below the sewing table and rising from an opening provided in the sewing machine table to form a corner cut in the sewing product;
A ball provided with a corner knife moving mechanism for moving the corner knife device to an operating position below the sewing machine table where the corner knife can form a corner cut in a sewing object and a maintenance position outside the edge of the sewing machine table. In the edge sewing machine,
The corner knife device to allow an increase in the corner knife only when located at the operating position, when not located in the operating position have a rise preventing means for preventing the rise of the corner knives,
The rising prevention means includes
A fixing member disposed below the sewing table;
When the corner knife device is positioned at the operating position, the corner knife device is positioned at the first position by contact with the fixing member, and when the corner knife device is out of the operating position, the second position is set by separation from the fixing member. A contact member that moves in conjunction with the movement of the corner knife device so as to be located at a position;
The corner knife is connected to the corner knife so as to rise, and when the contact member is located at the second position, the corner knife contacts the contact member to prevent the corner knife from rising. An edge stitch sewing machine, comprising: a connecting member that releases the contact with the contact member when the contact member is positioned at the first position, and allows the corner knife to rise.

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