JP4860405B2 - Sewing sewing machine - Google Patents

Description

  The present invention relates to an edge stitch sewing machine.

There is a garment sewing machine that sews a garment cloth on the garment body cloth and forms a pocket by forming a predetermined cut in the garment cloth and the garment cloth.
In sewing with a ball stitch sewing machine, on the upper surface of the needle plate, the body cloth and the ball edge fabric are placed on top of each other, and from above, it consists of a bottom plate portion and a vertical plate portion erected vertically on the upper surface. A binder having a T-shaped cross section is placed. 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 an 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. .
Then, the pocket is formed by returning the ball edge cloth once through the center cut after finishing the sewing.

By the way, the corner knife apparatus which has a corner knife is provided under the sewing machine table which arrange | positions a sewing machine main body. In addition, it is necessary to perform maintenance such as knife adjustment for the corner knife device. In order to make the adjustment work easier, the corner knife device can be moved from the bottom of the sewing machine table to the outside of the sewing machine table. Has been.
Specifically, the corner knife device is provided with a rotation fulcrum and is held on a fixed base via a fixing screw. When performing maintenance such as adjusting the knife, loosen the fixing screw and center the rotation fulcrum. A configuration is proposed in which the corner knife device is rotated and moved from a position below the sewing machine table to a position outside the sewing machine table (see, for example, Patent Document 1).
JP 2000-107474 A

However, the fixing of the corner knife device to the fixing base with the fixing screw can be performed at an operable position even if the fixing screw is not loosened, so it moves to the sewing position after the maintenance of the corner knife device is completed. When sewing is performed, the user may forget to fix the fixing base with a fixing screw.
When sewing is started without fixing the corner knife device to the fixed base, the position of the corner knife device is shifted due to vibration during sewing, etc., and a cut cannot be formed at the correct position, or the corner knife collides with the sewing machine table. As a result, the corner knife is damaged.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an edge stitch sewing machine that allows a user to easily notice that the corner knife device is not properly fixed.

The invention according to claim 1 is a corner knife device having a corner knife arranged below a sewing machine table and rising from an opening provided in the sewing machine table to form a corner cut in a sewing product, and the corner knife. A corner knife moving mechanism for linearly moving the apparatus to an operating position below the sewing machine table where a corner cut can be formed in a sewing object by the corner knife, and a maintenance position outside an operator side edge of the sewing table; An elastic member that urges the corner knife device to escape from the operating position toward the maintenance position; and a holding mechanism that holds the corner knife device at the operating position against the pressing force of the elastic member. It is characterized by that.
Here, the “operating position below the sewing machine table where the corner cut can be formed” means a position where the corner knife can rise from the opening of the sewing machine table without colliding with the sewing machine table. The “maintenance position outside the operator side edge” refers to a position where the corner knife is outside the operator side edge of the sewing machine table by detaching from the operating position immediately below the table when viewed from above the table. Accordingly, when referring to the maintenance position, if the corner knife is within the area outside the operator side edge of the sewing machine table, it is in the maintenance position.

According to the first aspect of the present invention, since the corner knife device is biased from the operating position toward the maintenance position by the elastic member, the corner knife device is not held against the pressing force of the elastic member by the holding mechanism. As long as the corner knife device is not in the operating position.
Therefore, when the corner knife device is not held by the holding mechanism, the user can recognize that the corner knife device is not in the operating position, so that the user easily notices that the corner knife device is forgotten to be fixed. be able to.

  According to the present invention, when the corner knife device is not held by the holding mechanism, the user can recognize that the corner knife device is not in the operating position, so the user forgets to fix the corner knife device. You can easily notice.

Hereinafter, the best mode of the edge stitch sewing machine will be described in detail with reference to the drawings. 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.
<Structure of the sewing machine>
As shown in FIG. 2, the rim stitch sewing machine 1 (hereinafter referred to as the “sewing machine 1”) sews the hem fabric B with two seams T parallel to the body fabric M and fabrics of these fabrics. The sewing machine forms a straight center cut S along the feed direction F and substantially V-shaped corner cuts V at both ends of the center cut S.

  As shown in FIG. 1, the sewing machine 1 moves up and down a machine frame 11 having a sewing machine table 11a as a sewing work table and a plurality of legs 11b that support the sewing machine table 11 and two sewing needles 41 at the lower end. A sewing machine body 12 that has a needle bar held on the sewing machine table 11a and is disposed on the upper surface of one end side of the sewing machine table 11a, and a fabric (sewing product) that is made up of a body cloth M and a rim cloth B that are placed on the sewing machine table 11a. A cloth feeding device 20 for feeding in the cloth feeding direction F, a bottom plate portion 31 formed in a long flat plate shape, and a standing plate portion 32 erected at a right angle on the upper surface along the longitudinal direction of the bottom plate portion 31. A binder 30 that presses the ball cloth B from above on the upper side of the body fabric M, and two on the both sides of the upright plate portion 32 of the binder 30 in the vicinity of the downstream side in the cloth feeding direction F of the binder 30. Parallel by the vertical movement of the sewing needle 41 And a needle vertically moving mechanism for needle (not shown) as seams T of this is formed.

  The sewing machine 1 is supported by the sewing machine main body 12 in the vicinity of the needle bar, and when the cloth (the body cloth M and the ball cloth B) is fed by the cloth feeding device 20, the downstream side of the sewing needle 41 in the cloth feeding direction F. A center knife mechanism (not shown) that raises and lowers the center knife 51 in the middle of each sewing needle 41 to form a straight center cut S between the two stitches T of the fabrics B and M; And a drive mechanism for moving the corner knife 91 up and down (up and down). The corner knife 91 is arranged on the downstream side in 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. The corner knife 91 is raised with respect to the fabrics B and M positioned above the center and protrudes from the opening 11c provided in the sewing machine table 11a, so that the center cut S is located on both outer sides in the longitudinal direction. It includes a corner knife device 90 to form a substantially V-shaped corner cut V, the control unit for controlling the above units and (not shown) in succession.

(Corner knife device)
As shown in FIGS. 1, 3, and 4, the corner knife device 90 is disposed in the passage path of the large pressers 21 and 21 by the cloth feeding device 20 below the sewing machine table 11 a. The corner knife device 90 has a corner knife 91 for forming a corner cut V in the fabrics B and M, and an opening formed in the sewing table 11a in the ball cloth B and the body cloth M conveyed by the cloth feeding device 20. By raising the corner knife 91 from the portion 11c, a substantially V-shaped corner break 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 and 91 arranged at intervals along the cloth feeding direction F, and a cylinder 92 that moves each corner knife 91 up and down via a predetermined power transmission mechanism. , 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.
The corner knife device 90 has two fabrics B and M in which two seams T and a center cut S are formed. When the fabric feeder 20 transports the fabrics B and M to a position directly above the corner knife device 90, two corner knife devices 90 are provided. By moving the corner knife 91 up and down at both ends of the center cut S, two substantially V-shaped corner cuts V are formed in the fabrics B and M.

(Corner knife moving mechanism)
Also, in the vicinity of the corner knife device 90, when performing maintenance such as knife maintenance and adjustment on the corner knife device 90, the corner knife device 90 is maintained from the operating position below the sewing machine table 11a as shown in FIG. A corner knife moving mechanism 60 is provided for drawing out to an outside maintenance position where work can be performed. The corner knife moving mechanism 60 includes a first guide member 61 arranged in the machine casing 11 and a second guide member 62 arranged in the corner knife device 90. The first guide member 61 and the second guide member 62 is fitted to function as a 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). At least two (two) first guide members 61 are provided in the front-rear direction (X-axis direction) of the sewing machine table 11a, and the corner knife device 90 is fitted to the second guide member 62 so that the left and right sides of the sewing machine table 11a It arrange | positions so that it can pull out to a 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 in a straight line substantially parallel to 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, and the second guide member 62 is linearly arranged in the Y-axis direction with respect to the first guide member 61. It is designed to slide. Accordingly, the corner knife device 90 is linearly moved via the first guide member 61 and the second guide member 62, and at least the corner knife 91 reaches the outside of the operator side edge of the sewing machine table 11a until the sewing machine table 11a. It can be pulled out along the left-right direction from below to the outside of the sewing machine 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.

  As shown in FIGS. 3 to 5, the corner knife device 90 includes a base 64 to which a part of the corner knife moving mechanism 60 is attached. The base 64 is provided so as to span between the pair of first guide members 61 and the second guide members 62, and extends in a direction perpendicular to the extending direction of the first guide members 61 and the second guide members 62. It is a long plate. Therefore, the base 64 is also movable along the Y direction together with the corner knife device 90. As shown in FIG. 6, a positioning pin 65 for positioning the corner knife device 90 at the operating position is formed on the back surface of the base 64 so as to protrude from the back surface. The positioning pin 65 can be inserted into a positioning hole 15 formed in the fixing base 14 to be described later. When the positioning pin 65 is inserted into the positioning hole 15, the corner knife device 90 is displaced in the X direction and the Z direction. To prevent.

  As shown in FIGS. 6, 8, and 9, a notch 64a is formed at the lower edge of the positioning pin 65 in the base 64, and the holding plate 66 (see FIG. 9) is provided so as to cover the notch 64a from the back side. ) Is fixed. Thus, the notch 64a is formed and the holding plate 66 is provided in a state where the surfaces of the fixing base 14 and the base 64 are as close as possible (preferably arranged on the same plane). This is because the holding force by the toggle clamp 100 is enhanced by holding.

The corner knife device 90 is held at the operating position by the toggle clamp 100 as a holding mechanism when the corner knife device 90 is located below the sewing machine table 11a and is in the operating position where a V-shaped cut can be formed in the ball cloth B and the body cloth M. Has been. Further, the corner knife device 90 is linearly moved by the first guide member 61 and the second guide member 62 so that the corner knife 91 is outside the sewing machine table 11a (outside the operator side edge of the sewing machine table 11a: FIG. 4). A movement restricting member (not shown) is provided to prevent the movement in the pulling direction so that it is not pulled out any more when it is pulled out to the maintenance position (see Fig. 2). After releasing, the corner knife device 90 can be pulled out from the operating position to the maintenance position, and the corner knife device 90 can be adjusted. The operator side edge of the sewing table 11a is the edge of the sewing table 11a on the arrow D side in FIG.
Regarding the configuration of the corner knife moving mechanism 60, sliding between the first guide member 61 and the second guide member 62 is possible between the first guide member 61 and the second guide member 62, such as a structure in which balls and rollers are interposed, and a structure in which they slide with each other. Various possible guide structures may be employed.

(Holding mechanism)
As shown in FIGS. 5 to 9, the toggle clamp 100 as a holding mechanism for holding the corner knife device 90 in the operating position is provided on the fixed base 14 provided on the sewing machine table 11a. The toggle clamp 100 holds the corner knife device 90 in the operating position against the pressing force to the base 64 based on the elastic force of the ball joint 120 described later.
The fixed base 14 is provided so as to be positioned below the sewing machine table 11 a and is provided so that the surface thereof faces the base 64. The toggle clamp 100 is provided in the vicinity of the lower end edge of the fixed base 14. A through hole 16 for passing a holding plate 66 provided in the base 64 is formed above the toggle clamp 100 in the fixed base 14, and a positioning hole 15 is formed above the through hole 16. Further, stoppers 17 that prevent the base 64 from colliding with the fixed base 14 are provided on both sides of the through hole 16. The stopper 17 is formed so as to protrude toward the base 64 side, and prevents the base 64 from colliding with the fixed base 14, and also the position of the base 64, in other words, the corner knife device 90 provided on the base 64. It also has a function as a guide for determining the position.

  In the toggle clamp 100, when the lever 101 is rotated to a certain angle by manual operation, the direction in which the force is applied to the holding portion 102 that contacts the holding plate 66 is reversed. The holding by 102 and the release from the holding can be switched. As shown in FIG. 9, the holding unit 102 moves the holding plate 66 toward the fixed base 14 when the corner knife device 90 is in the operating position in the vicinity of the fixed base 14 by the downward rotation operation of the lever 101. The corner knife device 90 is held together with the base 64 and the holding plate 66 by pressing. In addition, as shown in FIG. 6, the holding unit 102 is separated from the holding plate 66 by the upward rotation operation of the lever 101 and retracts from the movement path of the base 64 and the holding plate 66 to hold the holding plate 66. release.

(Elastic member)
As shown in FIGS. 5 to 9, a ball joint 120 is provided above the positioning hole 15 as an elastic member that biases the corner knife device 90 from the operating position toward the maintenance position.
The ball joint 120 is provided so as to be urged and protruded from the support base 121 toward the base 64 by a support base 121 and a spring provided inside the support base 121, and can protrude and retract from the support base 121. And a protrusion 122.
The height from the fixed base 14 to the tip of the protrusion 122 is formed higher than the stopper 17 provided on the fixed base 14, and the base 64 protrudes when a force is applied to move the corner knife device 90 to the operating position. 122 is pressed and retracted into the support base 121. When the force applied to the base 64 is released with the protrusion 122 retracted into the support base 121, the corner knife device 90 provided on the base 64 is pressed together with the base 64 toward the maintenance position by the biasing force of the spring. To move. That is, when the base 64 is not held by the toggle clamp 100, the corner knife device 90 cannot be in the operating position, and is moved to the maintenance position by the protrusion 122. Here, the position of the base 64 to be moved to the maintenance position can be changed as appropriate, and the corner knife device 90 is moved further toward the user by reinforcing the spring that biases the protrusion 122. be able to.

(Function and effect)
As described above, according to the ball stitching sewing machine 1, when the corner knife device 90 is moved to the operating position of the corner knife 91 in the vicinity of the fixed base 14, the base 64 that supports the corner knife device 90 is attached to the fixed base 14. Before coming into contact, it comes into contact with a stopper 17 provided on the fixed base 14. At this time, the upper portion of the base 64 abuts on the protrusion 122 of the ball joint 120 and pushes the protrusion 122 into the support base 121. Further, the positioning pin 65 enters the positioning hole 15 of the fixed base 14 and the corner knife device 90 reaches the operating position.

Here, by rotating the lever 101 of the toggle clamp 100 downward and pressing the holding portion 102 against the holding plate 66 provided on the base 64, the corner knife device 90 can be held together with the base 64 in the operating position. it can.
On the other hand, if the corner knife device 90 is not held in the operating position by the toggle clamp 100, the corner knife device 90 is biased from the operating position toward the maintenance position by the biasing force of the protrusion 122 of the ball joint 120. Unless the corner knife device 90 is held against the pressing force of the protrusion 122 by the toggle clamp 100, the corner knife device 90 is not positioned in the operating position.

Therefore, when the corner knife device 90 is not held by the toggle clamp 100, the user can recognize that the corner knife device 90 is not in the operating position, and the user forgets to fix the corner knife device 90. You can easily notice.
In addition, since the toggle clamp 100 is used as a holding mechanism for holding the corner knife device 90 in the operating position, an electric drive source such as a motor is not required, and the corner knife device 90 can be operated only by the vertical movement of the lever 101 by the user. Holding and releasing can be performed, and handling can be improved.

The perspective view which shows schematic structure of a ball stitch sewing machine. Explanatory drawing which shows the relationship between 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. The perspective view which shows a corner knife apparatus. The perspective view which shows the state which pulled out the corner knife apparatus from the sewing machine table lower part. The perspective view which shows the state which has a corner knife apparatus in a maintenance position. The perspective view which shows the structure around a toggle clamp. The perspective view which shows the state which has a corner knife apparatus in an operation position. The perspective view which shows the holding state of the holding plate by a toggle clamp. The perspective view which shows the holding state of the holding plate by a toggle clamp.

Explanation of symbols

1 Sewing edge sewing machine 11a Sewing machine table 11c Opening 60 Corner knife moving mechanism 90 Corner knife device 91 Corner knife 100 Toggle clamp (holding mechanism)
120 Ball joint (elastic member)

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 corner knife moving mechanism that linearly moves the corner knife device to an operating position below the sewing machine table where the corner knife can form a corner cut in the workpiece and a maintenance position outside the operator side edge of the sewing machine table. When,
An elastic member for urging the corner knife device to escape from the operating position toward the maintenance position;
A holding mechanism that holds the corner knife device in the operating position against the pressing force of the elastic member;
An edge stitch sewing machine characterized by comprising:

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