CN106245239A - Clamp system and possess the sewing machine of this clamp system - Google Patents

Abstract

The present invention can carry out the sewing of various curved surfaces. The clamping mechanism includes: a plurality of clamping units (40), which have a pair of clamping members (41, 42) for clamping the to-be-sewn object (C1, C2), and a pair of clamping members for supporting the pair of clamping members. A support block (44); and a frame (31), which is installed with a support block, and the frame has one or more long-hole-shaped installation holes (32-35), and the installation holes are formed along a curved curve or a plurality of straight lines, wherein , the plurality of straight lines are along the bent curve, and the plurality of clamping units are mounted to be positionally adjustable along the mounting holes of the frame.

Description

Clamping mechanism and sewing machine equipped with the clamping mechanism

technical field

The present invention relates to a clamp mechanism when sewing a curved surface-shaped object and a sewing machine equipped with the clamp mechanism.

Background technique

For example, in the sewing of shoes, the toe part and the heel part of the upper of the shoe composed of left and right parts are sewn into a ring shape, and seaming members such as labels and reinforcing materials are sewn on the outside of the heel part.

The heel part of the upper of the shoe needs to be processed into a curved shape in accordance with the shape of the heel of the foot. However, in order to sew the upper in a curved state, a so-called high sewing table (post bed) sewing machine is used. In the table sewing machine, a kettle and a needle plate are installed upright from the upper surface of the sewing machine base so that the fabrics on both sides of the sewing position can be bent.

In addition, sewing performed by automatic feeding along a pattern corresponding to the outer shape of the seamed member is also required for a curved surface-shaped object such as the heel portion of the shoe upper described above.

However, a sewing machine that sews by automatic feeding according to a predetermined pattern is generally configured such that the object to be sewn is placed on a plane, and the object to be sewn is moved corresponding to each stitch according to the coordinates of the plane to sew. Sewing machines cannot handle curved surfaces such as shoe uppers.

In order to deal with this problem, the existing sewing machine is equipped with: a cylindrical support body, which holds the object to be sewn in a curved shape; and a stepping motor, which makes the support body rotate freely, and the sewing machine realizes automatic feeding sewing (for example, refer to Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 61-265169

However, the conventional sewing machine described above has a structure in which the cylindrical support body is rotated, so there is a problem that the mechanism becomes large and the sewing machine as a whole becomes larger.

In addition, since the size of the cylindrical support is fixed, it is necessary to prepare supports of various sizes in order to sew a sewn object of a plurality of sizes.

In particular, in the case of shoes, the size is very finely divided, and since there is a difference between left and right of shoes, it is necessary to prepare a plurality of supports with different sizes.

Contents of the invention

An object of the present invention is to provide a clamp mechanism capable of sewing various curved surfaces, and a sewing machine provided with the clamp mechanism.

(1) The present invention is a kind of clamping mechanism, is characterized in that, possesses:

a plurality of clamping units having a pair of clamping parts for clamping a sewn object, and a support block for supporting the pair of clamping parts; and

frame, which mounts the support blocks,

The frame has one or more long-hole-shaped installation holes, the installation holes are formed along a curved curve or a plurality of straight lines, wherein the plurality of straight lines are along the curved curve,

The plurality of clamping units are mounted to be positionally adjustable along the mounting holes of the frame.

(2) The present invention is characterized in that, in the clamping mechanism described in (1),

The clamping surface of the clamping part is formed by one or more planes.

(3) The present invention is characterized in that, in the clamping mechanism described in (1),

The clamping surface of the clamping part is formed by a curved surface.

(4) The present invention is characterized in that, in the clamping mechanism described in any one of (1) to (3),

The pair of clamping parts extend from the support block to the side opposite to the frame,

The support block supports the pair of clamp members so as to be positionally adjustable in a direction in which the pair of clamp members extend.

(5) The present invention is characterized in that, in the clamping mechanism described in any one of (1) to (4),

An evacuation guide portion is provided for evacuating the hanging portion hanging from the sewn object clamped by the clamp member from the needle drop position.

(6) The present invention is a sewing machine, characterized in that it possesses:

a swing mechanism that swings the clamping mechanism described in any one of (1) to (5) about an axis that is located inside the curved curve of the mounting hole of the frame;

an axis moving mechanism that relatively moves the clamping mechanism and the needle bar along the axis of swing of the clamping mechanism; and

The control device controls the driving source of the swing mechanism and the driving source of the axis moving mechanism, and performs needle drop to an arbitrary position of the sewing object.

(7) The present invention is characterized in that, in the sewing machine described in (6),

An intermediate presser is provided, and the intermediate presser moves up and down in conjunction with the needle bar.

(8) The present invention is characterized in that, in the sewing machine described in (7),

Equipped with a needle plate for needle drop,

A protrusion is provided at the needle drop position of the needle plate, and the protrusion cooperates with the descending intermediate presser foot to press the sewn object from above and below.

The effect of the invention

In the present invention, the plurality of clamping units holding the sewing object can be adjusted in position along one or more long-hole-shaped installation holes, and the installation holes are formed along a curved curve, so they can The curved surface formed by the curved surface holds the object to be sewn, which can suppress the occurrence of wrinkles and hooks after sewing the object to be sewn with a curved surface, and realize good sewing.

In addition, since each clamping unit is positionally adjustable along the mounting hole, ring-shaped sewing objects of various sizes can be held satisfactorily by changing the unit interval, and there is no need to prepare a plurality of clamping mechanisms of different sizes.

In addition, since each clamp unit can be positionally adjusted along the mounting hole, even a to-be-sewn object having various curved surfaces with different radii of curvature can be satisfactorily sewn through the position adjustment.

In addition, since a cylindrical support body is unnecessary, the sewing machine can be downsized.

Description of drawings

Fig. 1 is a perspective view of a sewing machine according to this embodiment.

Fig. 2 is a perspective view of the sewing machine according to the embodiment after the movement of the table.

Fig. 3 is a block diagram showing a control system of the sewing machine shown in Fig. 1 .

Fig. 4 is a perspective view of a first clamp mechanism mounted on the sewing machine.

Figure 5 is a front view of the first clamping mechanism.

Figure 6 is a rear view of the first clamping mechanism.

Fig. 7 is a side view of the pressing support mechanism of the first clamping mechanism.

Fig. 8 is a perspective view of a second clamp mechanism mounted on the sewing machine.

Figure 9 is a rear view of the second clamping mechanism.

Fig. 10 is a front view of a first clamp mechanism provided with an escape guide.

Fig. 11 is an explanatory view showing problems of the intermediate presser.

Fig. 12 is an explanatory view showing a boss that solves the problem of the intermediate presser.

Explanation of labels

11 Intermediate presser foot

15-pin board

16 raised part

30 First clamping mechanism

31 frames

32, 33 Mounting holes on the upper side

34, 35 Mounting holes on the lower side

38, 39 Avoidance Guidance Department

40, 40A～40D clamping unit

41 Upper clamping part

42 Lower clamping part

43 Press support mechanism

44 support block

50 Second clamping mechanism

51 frames

52, 53 Mounting holes on the upper side

54, 55 Mounting holes on the lower side

60, 60A～60C clamping unit

61, 611, 612 upper side clamping parts

62, 621, 622 Lower clamping parts

64 support blocks

70 swing mechanism

73 Swing motor (drive source)

80 axis moving mechanism

83 axis moving motor (drive source)

90 Controls

100 sewing machines

321, 322, 331, 332 straight part

341, 342, 351, 352 straight part

411, 412, 421, 422 planes

611, 612 upper side clamping parts

621, 622 Lower side clamping parts

A1～A4 arc

C1 shoe upper (to be sewn)

C2 Reinforcing material (to be sewn)

C3 label (to be sewn)

C11 toe (hanging part)

detailed description

[Overall structure of sewing machine]

Next, a sewing machine 100 as an embodiment of the present invention will be described based on FIGS. 1 to 9 . The sewing machine 100 is an automatic sewing machine that uses first and second clamping mechanisms 30 and 50 suitable for holding a curved object to perform needle drop at an arbitrary position according to a predetermined sewing pattern.

FIGS. 1 and 2 are perspective views illustrating a part of the sewing machine 100 with the structure omitted, and FIG. 3 is a block diagram showing a control system of the sewing machine.

In the following description, the following case is exemplified, that is, for the shoe upper C1 (refer to FIG. Do the seaming.

The above-mentioned sewing machine 100 is provided with: a needle bar which holds a sewing needle at a lower end; a needle bar vertical movement mechanism which moves the needle bar up and down; mechanism, which makes the presser foot 11 move up and down; the first clamping mechanism 30, which holds the upper C1 and the reinforcing material C2; the second clamping mechanism 50, which holds the upper C1 and the label C3; the swing mechanism 70, which makes the first and the second clamping mechanism 30, 50 swing; axis moving mechanism 80, which makes the first and second clamping mechanism 30, 50 move along its swing axis; sewing machine frame 20, which stores or carries the above-mentioned structures; and control device 90, which controls the above-mentioned structures, and performs needle drop at any position of the shoe upper C1, the reinforcing material C2, and the label C3.

The sewing machine frame 20 is provided with: a sewing machine base part 21, which is located at the lower part; a vertical body part 22, which stands up from the sewing machine base part 21; extended.

In addition, in FIG.1 and FIG.2, illustration of the cover of each part of the sewing machine frame 20 is abbreviate|omitted, and the illustration of the internal structure is also abbreviate|omitted.

The mechanism for moving the needle bar up and down includes: a sewing machine motor 12; an upper shaft that is rotated by the sewing machine motor 12; Since it is a well-known structure, detailed description is omitted.

The kettle mechanism has: a so-called horizontal kettle; a kettle shaft which supports the horizontal kettle; a lower shaft which is rotated by the sewing machine motor 12; and a transmission mechanism which transmits the rotational force from the lower shaft to the kettle shaft. Therefore, detailed description is omitted.

In addition, the sewing machine 100 is a so-called high sewing platform (post bed) sewing machine, and the horizontal kettle is built in the upper part of the high sewing platform (post bed) 24, and the high sewing platform 24 stands upright at the position below the sewing needle at the sewing machine base part 21. set up.

The intermediate presser mechanism is equipped with: an intermediate presser rod, which holds the intermediate presser 11 at the lower end; structure, so a detailed description is omitted.

The middle presser foot 11 has a cylindrical portion into which a sewing needle is loosely inserted. Float to press.

The intermediate presser mechanism performs a transfer action so that the intermediate presser 11 moves up and down in the same period as the sewing needle and later than the sewing needle. Thereby, the to-be-sewn object which is pulled up by the lifting of the sewing needle is pressed, and the sewing needle is pulled out from the to-be-sewn object favorably.

[First clamping mechanism]

FIG. 4 is a perspective view of the first clamping mechanism 30, FIG. 5 is a front view, and FIG. 6 is a rear view.

The first clamping mechanism 30 includes: four clamping units 40A-40D arranged in sequence along the Y-axis direction to clamp the shoe upper C1 and the reinforcing material C2 overlappingly; and a frame 31 supporting the clamping units 40A-40D. 40D.

In addition, since the four clamping units 40A to 40D have substantially the same structure and structure, in the following description, each of the clamping units 40A to 40D will be collectively referred to as the clamping unit 40, and each of the clamping units 40A to 40D has The structure of each part of 2 is described using the same reference numerals, and the common content will be described in general, and the different points will be described separately for each of the clamping units 40A to 40D.

In addition, the frame 31 of the above-mentioned first clamping mechanism 30 is a long flat plate, and the direction parallel to the flat plate surface of the frame 31 and its longitudinal direction is defined as the Y-axis direction, and the direction parallel to the flat plate surface of the frame 31 and The direction perpendicular to the longitudinal direction thereof is referred to as the Z-axis direction, and the direction perpendicular to the flat plate surface of the frame 31 is referred to as the X-axis direction, and each part of the first clamp mechanism 30 will be described.

The clamp unit 40 includes: a pair of clamp members composed of an upper clamp member 41 and a lower clamp member 42, the upper clamp member 41 is arranged on the upper side of the shoe upper C1 and the reinforcing material C2, and the lower side clamp member 42 The clamping member 42 is arranged on the lower side of the shoe upper C1 and the reinforcing material C2; the pressing support mechanism 43 presses the upper clamping member 41 to the lower clamping member 42 side; and the support block 44 supports the upper clamping Part 41 and lower clamping part 42 .

The lower clamp member 42 is a long plate-shaped member along the X-axis direction, and extends from the support block 44 toward the side opposite to the frame 31 .

Among the four clamping units 40A to 40D, the lower clamping members 42 of the two clamping units 40B and 40C located in the center of the Y-axis direction have two planes 421 parallel to the X-axis direction on their upper surfaces. 422 (clamping surface), the lower side clamping parts 42 of the two clamping units 40A, 40D located at both ends of the Y-axis direction, the upper surface is formed by a plane 421 (clamping surface) parallel to the X-axis direction. )constitute.

Furthermore, as shown in FIG. 5 , the flat surfaces 421 and 422 of the upper surfaces of the lower clamp members 42 of these clamp units 40A to 40D are arranged along circular arcs that protrude upward when viewed from the X-axis direction. arrangement.

In addition, each lower clamp member 42 is attached to the support block 44 with screws 441 in a state where the upper surface of the end portion on the side of the support block 44 is in contact with the lower surface of the support block 44 .

Each support block 44 has a stepped portion that abuts on the side end portion of the lower clamp member 42 on the side of one end portion in the Y-axis direction. In addition, an elongated hole 442 along the X-axis direction is formed vertically through the support block 44 , and a screw 441 is inserted into the elongated hole 442 from above and inserted into the screw hole of the lower clamp member 42 .

Therefore, the screw 441 is screwed out, the lower clamp member 42 is moved in the X-axis direction by slidingly contacting the lower surface and the stepped portion of the support block 44, and the lower clamp member 42 can be tightened at any position by tightening the screw 441. The extension length of the clamping member 42 relative to the support block 44 is adjusted.

In addition, each lower clamp member 42 has an extended end portion whose shape viewed from the Z-axis direction is similar to the shape of the side edge portion of the reinforcing material C2. Therefore, at the time of sewing, the reinforcement material C2 can hold the vicinity of the needle drop position along the side edge part.

The upper clamp member 41 is a plate-shaped member, and is supported by a support block 44 via a pressing support mechanism 43 with its lower surface facing the upper surface of the lower clamp member 42 .

Among the four clamping units 40A to 40D, the upper clamping members 41 of the two clamping units 40B and 40C located in the center of the Y-axis direction have two planes 411 parallel to the X-axis direction on their lower surfaces. 412 (clamping surface), the upper side clamping member 41 of the two clamping units 40A, 40D located at both ends of the Y-axis direction has a lower surface formed by a plane 411 (clamping surface) parallel to the X-axis direction. )constitute.

Furthermore, as shown in FIG. 5 , the planes 411 and 412 on the lower surface of the upper clamp member 41 of these clamp units 40A to 40D are arranged along circular arcs protruding upward when viewed from the X-axis direction. arrangement.

And, each plane 411, 412 of the lower surface of the upper side clamping member 41 of the clamping units 40A to 40D is in parallel with each plane 421, 422 of the upper surface of the opposite lower side clamping member 42 respectively, and each upper The upper C1 and the reinforcing material C2 clamped by the side clamp members 41 and the respective lower clamp members 42 are held in a state substantially along the circumferential surface including the aforementioned arc.

FIG. 7 is a side view of the clamping unit 40 .

The pressing support mechanism 43 is equipped with: a movable block 431, which is mounted on the upper surface of the upper clamping member 41 by screws; a base 432, which is fixedly equipped on the upper surface of the support block 44; The upper clamping member 41 is switched between a holding position opposite to the lower clamping member 42 and a release position separated from the lower clamping member 42; member 41 ; and a link member 435 that connects the base 432 and the operating rod 433 .

The base 432 is connected to the lower part of one end of the rotating arm 434 at one end in the X-axis direction so as to be rotatable around the Y-axis, and is connected to one end of the link member 435 so as to be rotatable around the Y-axis at the other end in the X-axis direction. .

One end of the operating rod 433 is connected to the upper part of one end of the rotating arm 434 so as to be rotatable around the Y axis, and the other end serves as an input operation unit for switching between the hold position and the release position. In addition, the operation rod 433 is connected to the other end of the link member 435 so as to be rotatable about the Y axis at a position near one end and slightly closer to the other end.

Thus, the base 432 , the operating lever 433 , the rotating arm 434 and the link member 435 constitute a four-joint link mechanism.

In this structure, when the input operation portion of the operating lever 433 is rotated downward, it is in line with the straight line connecting the connecting point between the operating lever 433 and the rotating arm 434 and the connecting point between the link member 435 and the base 432 . In contrast, the connection point between the operation rod 433 and the link member 435 is on the lower side. In this state, the shoe upper C1 and the reinforcing material C2 are clamped between the upper clamping member 41 and the lower clamping member 42. Even if the operating rod 433 is pushed back by its restoring force, the force will not push the operating rod 433. The input operation part is transmitted in the direction of pushing up, and the clamping state can be maintained.

In addition, an elongated hole 434b along the X-axis direction is formed vertically through the rotating arm 434, and is connected to the movable block 431 by a screw 434a passing through the elongated hole 434b. Therefore, the movable block 431 can be moved to an arbitrary position in the X-axis direction with the screw 434a screwed out, and can be fixed at that position by tightening the screw 434a.

That is, the upper clamp member 41 can be arbitrarily adjusted in position in the X-axis direction. As mentioned above, since the lower clamping member 42 can also be positionally adjusted along the X-axis direction, by adjusting the positions of the upper clamping member 41 and the lower clamping member 42, it is possible to adjust the clamping position between them. Tight width adjustments.

As described above, the support block 44 supports the upper clamp member 41 on its upper surface side, and supports the lower clamp member 42 on its lower surface side.

In addition, the support block 44 has an end surface that is in contact with the flat plate surface of the frame 31 at the end opposite to the extended end of the upper clamp member 41 and the lower clamp member 42. The state is supported by the frame 31.

As shown in FIG. 6 , the frame 31 is a flat plate that is elongated in the Y-axis direction and formed in a substantially arched shape.

Furthermore, in order to mount the four clamping units 40A to 40D in the frame 31, the upper mounting holes 32, 33 and the lower mounting holes 34, 35 are formed to pass through in a vertical arrangement. The long holes of the multiple straight lines follow circular arcs that are curved curves.

The upper mounting holes 32 , 33 are formed at one end portion and the other end portion in the Y-axis direction at the frame 31 , and have two linear portions 321 , 322 and 331 , 332 , respectively.

Furthermore, these linear portions 321 , 322 , 331 , and 332 are all formed along a common arc A1 , and this arc A1 has a center position set below the frame 31 .

In addition, the lower mounting holes 34 , 35 are formed at one end portion and the other end portion in the Y-axis direction at the frame 31 , and have two linear portions 341 , 342 and 351 , 352 , respectively.

Furthermore, these linear portions 341 , 342 , 351 , and 352 are all formed along a common arc A2 , and the center position is set below the frame 31 . In addition, this arc A2 is concentric with the aforementioned arc A1, and is set to have a smaller diameter than the arc A1.

In addition, although the above-mentioned upper mounting holes 32 and 33 are divided into two, they may be connected to constitute one upper mounting hole, and in this case, may be constituted by more linear portions. The same applies to the lower mounting holes 34 and 35 .

In addition, the support blocks 44 of the clamp units 40A to 40D have two screw holes arranged vertically on the end face of the frame 31, and are inserted into the upper mounting hole 32 and the lower mounting hole 34, or the upper mounting hole 32 and the upper mounting hole 34 respectively. The frame 31 is fixed to the frame 31 by fastening the screws 36 and 37 (see FIG. 7 ) in the side mounting holes 33 and the lower mounting holes 35 .

In addition, by screwing out these screws 36 and 37 , each clamp unit 40 can be adjusted in position along the upper mounting hole 32 and the lower mounting hole 34 , or the upper mounting hole 33 and the lower mounting hole 35 . That is, each clamp unit 40 can perform position adjustment substantially along arcs A1 and A2. In addition, position adjustment can be performed while maintaining a fixed posture with respect to the centers of the two arcs A1 and A2.

In addition, the support block 44 may be attached to any one of the upper mounting hole or the lower mounting hole uniaxially, and the angle adjustment may be performed around the uniaxial. In this case, each clamp unit 40 does not maintain a fixed posture with respect to the center of the two arcs A1, A2, but it is not limited to the arcs, and the sewn object can be flexed in a richer shape. .

[Second Clamping Mechanism]

FIG. 8 is a perspective view of the second clamping mechanism 50, and FIG. 9 is a rear view.

In addition, regarding the second clamp mechanism 50, the same reference numerals are attached to the same structures or structures as those of the above-mentioned first clamp mechanism 30, and repeated descriptions are omitted, and the differences from the first clamp mechanism 30 will be mainly described. .

The second clamp mechanism 50 includes three clamp units 60A to 60C arranged sequentially along the Y-axis direction to clamp the shoe upper C1 and the label C3 , and a frame 51 supporting the respective clamp units 60A to 60C.

In addition, also in the case of the above-mentioned three clamp units 60A to 60C, they are collectively referred to as the clamp unit 60 , and the same reference numerals are used for the configurations of the respective parts of the clamp units 60A to 60C, and the common contents will be described. , about the respective clamp units 60A to 60C, different points will be described individually.

In the case of the second clamping mechanism 50 as well, the direction parallel to the flat plane of the frame 51 and parallel to its longitudinal direction is defined as the Y-axis direction, and the direction parallel to the flat plane of the frame 51 and perpendicular to its longitudinal direction The intersecting direction will be referred to as the Z-axis direction, and the direction perpendicular to the flat plate surface of the frame 51 will be described as the X-axis direction.

The clamp unit 60 includes a pair of clamp members composed of an upper clamp member 61 disposed above the shoe upper C1 and the label C3 and a lower clamp member 62. The clamping member 62 is arranged on the lower side of the shoe upper C1 and the tag C3; the pressing support mechanism 43 presses the upper clamping member 61 to the lower clamping member 62 side; and the supporting block 64 supports the upper clamping member 61 And the lower clamping part 62.

The lower clamping member 62 is a plate-shaped member, and extends from the support block 64 toward the side opposite to the frame 51 .

Among the three clamp units 60A to 60C, only the clamp unit 60B positioned at the center in the Y-axis direction has a lower clamp member 62 composed of a pair of lower clamp members 621 and 622 arranged in the Y-axis direction.

In addition, the lower clamp members 62 , 621 , 622 of all the clamp units 60A to 60C have upper surfaces composed of one plane (clamp surface) parallel to the X-axis direction.

Furthermore, each plane on the upper surface of the lower clamp members 62 , 621 , 622 of these clamp units 60A to 60C is arranged along an arc convex upward when viewed from the X-axis direction.

In addition, the same point as the first clamp mechanism 30 is that the lower clamp members 62 of both the clamp units 60A, 60C are supported by the support block 64 so as to be positionally adjustable in the X-axis direction.

On the other hand, with respect to the central clamp unit 60B, a pair of lower clamp members 621 , 622 are respectively supported by the support blocks 64 so as to be positionally adjustable in the Y-axis direction.

In addition, the shape of the extension end portion of the lower side clamp member 62 of all the clamp units 60A to 60C is similar to the shape of the side edge portion of the label C3.

The upper clamp member 61 is a plate-shaped member, and is supported by a support block 64 via the pressing support mechanism 43 in a state where its lower surface side faces the upper surface of the lower clamp member 62 .

In addition, only the clamp unit 60B positioned at the center has an upper clamp member 61 composed of a pair of upper clamp members 611 and 612 arranged in the Y-axis direction.

The lower surfaces of the upper clamp members 61, 611, and 612 of all the clamp units 60 are constituted by one plane (clamp surface) parallel to the X-axis direction.

Furthermore, the planes of the lower surfaces of the upper clamp members 61 , 611 , and 612 of these clamp units 60A to 60C are arranged along arcs protruding upward when viewed from the X-axis direction.

In addition, the same point as the first clamping mechanism 30 is that the lower surfaces (clamping surfaces) of the upper clamping members 61, 611, 612 and the upper surfaces of the opposing lower clamping members 62, 621, 622 are respectively parallel.

In addition, since each clamp unit 60 is equipped with the same press support mechanism 43 as the first clamp mechanism 30, description thereof will be omitted.

However, the upper clamp members 61 of both the clamp units 60A and 60C are supported by the pressing support mechanism 43 so as to be positionally adjustable in the X-axis direction, but with respect to the central clamp unit 60B, a pair of upper clamp members 611 , 612 are respectively supported by the pressing support mechanism 43 in a position-adjustable manner along the Y-axis direction.

As shown in FIG. 9 , the frame 51 is a flat plate that is elongated in the Y-axis direction and formed in a substantially arched shape.

Furthermore, in order to mount the three clamping units 60A to 60C, the upper mounting holes 52 and 53 and the lower mounting holes 54 and 55 are penetratingly formed in the frame 51, and these mounting holes are elongated holes composed of a plurality of straight lines. , the lines follow circular arcs that are curved curves.

The upper mounting holes 52 and 53 are formed in the frame 51 near the center in the Y-axis direction, and both are formed along a common arc A3 that sets the center position below the frame 51 .

In addition, the lower mounting holes 54 and 55 are formed in the frame 51 near the center in the Y-axis direction, and both are formed along a common arc A4 with a center position set below the frame 51 . In addition, this circular arc A4 is concentric with the aforementioned circular arc A3, and is set to have a smaller diameter than this circular arc A3.

In addition, although the above-mentioned upper mounting holes 52 and 53 are divided into two, they may be connected to form one upper mounting hole, and in this case, they may be in a zigzag shape composed of a plurality of linear portions. The same applies to the lower mounting holes 54 and 55 .

In addition, the support block 64 of the clamp unit 60A is fixed to the frame 51 by fastening two screws 56 (one not shown) inserted into the upper mounting hole 52 and the lower mounting hole 54 respectively at the end surface on the frame 51 side. .

In addition, the support block 64 of the clamp unit 60C is fixed to the frame 51 by fastening two screws 56 (one not shown) inserted into the upper mounting hole 53 and the lower mounting hole 55 respectively at the end surface on the frame 51 side. .

The same point as the first clamping mechanism 30 is that the two clamping units 60A, 60C can be adjusted in position along the upper mounting hole 52 and the lower mounting hole 54 , or the upper mounting hole 53 and the lower mounting hole 55 , the position can be adjusted while maintaining a fixed posture.

[axis moving mechanism]

The axis moving mechanism 80 includes: a table 81 on which the swing mechanism 70 and the first and second clamping mechanisms 30, 50 are mounted; This table 81 is supported movably; an axis moving motor 83 which becomes a drive source for movement in the swing axis direction of the table 81; and a ball screw mechanism 84 which converts the torque of the axis moving motor 83 into a straight line in the swing axis direction. action.

The slide guides 82, 82 are fixedly mounted on the upper surface of the sewing machine base 21 so as to be parallel to the swing axis direction. The swing axis direction coincides with the longitudinal direction of the sewing machine base portion 21 and the sewing machine arm portion 23 .

The slide guides 82 and 82 allow the table 81 to slide through four sliders 821 (only one is shown in FIGS. 1 and 2 ) provided at the lower portion of the table 81 .

The table 81 is a rectangular frame.

The ball screw mechanism 84 includes: a ball nut 841 provided at a corner of the table 81 ; and a ball screw shaft 842 inserted into the ball nut 841 and connected to the output shaft of the axis moving motor 83 .

The axis moving motor 83 is not particularly limited as long as it has a controllable amount of movement. For example, a stepping motor is used.

With these structures, the axis moving mechanism 80 can arbitrarily position the shoe upper C1 held by the first and second clamping mechanisms 30 , 50 , the reinforcing material C2 and the label C3 on the table 81 along the direction of the swing axis.

[swing mechanism]

The swing mechanism 70 is provided with: a swing frame body 71, which is provided swingably around a predetermined swing axis with respect to the table 81 of the axis moving mechanism 80; a swing guide part 72, which guides the swing of the swing frame body 71; The motor 73 is mounted on the upper surface of the table 81 and serves as a driving source for the swinging motion of the swinging frame 71 ; and the transmission mechanism 74 transmits the torque of the swinging motor 73 to the swinging frame 71 .

The swing frame 71 fixes and supports the first clamping mechanism 30 and the second clamping mechanism 50 in such a way that the extension directions of the pair of clamping parts of the first clamping mechanism 30 and the second clamping mechanism 50 are parallel and opposite to each other. . For example, the first clamp mechanism 30 and the second clamp mechanism 50 are connected in a facing state in advance, and these clamp mechanisms 30 , 50 are fixedly supported by the toggle mechanism 711 provided on the swing frame 71 .

In addition, the swing frame body 71 is pivotally supported by a swing shaft (not shown) provided below the table 81 .

Moreover, it is set such that the center of the arc along which the lower surface of the upper clamping member of the fixedly supported first and second clamping mechanisms 30, 50 and the upper surface of the lower clamping member follow, and the upper side The centers of the circular arcs A1 and A3 of the mounting holes and the circular arcs A2 and A4 of the lower mounting holes are all located on the axis of the swing shaft.

Thus, even if the swing frame 71 swings, the distances between the sewing needle and the horizontal tank relative to the shoe upper C1 , the reinforcing material C2 , and the label C3 held by the first clamp mechanism 30 and the second clamp mechanism 50 can be kept constant. .

The swing guide portion 72 is a guide plate having a guide groove into which a boss-shaped projection (not shown) provided on the swing frame body 71 is inserted. The guide groove is formed in an arc shape centered on the swing axis, and suppresses vibration during swing of the swing frame 71 to maintain a stable swing operation.

The swing motor 73 is not particularly limited as long as it is a motor whose movement amount can be controlled. For example, a stepping motor is used.

The transmission mechanism 74 is constituted by a so-called transmission belt mechanism, and specifically includes: a driving sprocket 741 provided on the output shaft of the swing motor 73; and a synchronous belt 742, which is set between the driving sprocket 741 and the driven sprocket.

With these structures, the swing mechanism 70 can arbitrarily control the swing angles of the upper C1 , the reinforcing material C2 and the label C3 held by the first and second clamping mechanisms 30 , 50 on the table 81 .

[Sewing machine control system]

As shown in FIG. 3 , the control device 90 is connected to a display panel 94 via an input/output circuit not shown, which displays various settings related to sewing and the current state of the sewing machine; The setting switch 95 of the unit, which is set at the same time as the display panel 94, is used to perform various settings when the screen is selected, and is used to input commands and values when setting the input unit; start of production.

The operation pedal 98 is a means for inputting a driving command for a sewing operation to the control device 90 by stepping on the pedal 98 . That is, when the operation pedal 98 is depressed, the control device 90 performs operation control to start sewing.

The operator performs setting and input of various parameters, such as setting of sewing pattern data for sewing and sewing pattern selection, etc., from the setting switch 95, and these parameters are used for setting the reinforcement material C2 and The label C3 is stitched to the stitching of the upper C1.

In addition, the sewing machine motor 12, the swing motor 73, and the axis moving motor 83 to be controlled are connected to the control device 90 via the drive circuits 12a, 73a, and 83a, respectively.

The control device 90 includes a CPU 91 for performing various controls, and a memory 92 in which a control program for controlling the operation of the sewing machine 100 and various sewing data are written.

For example, sewing pattern data is stored in the memory 92 .

The sewing pattern data is data including position coordinate data obtained by developing all the needle entry positions in a coordinate system constituting a sewing pattern for sewing the reinforcing material C2 and the label C3, and the coordinate system consists of a swing The position in the axial direction and the swing angle constitute.

The sewing pattern data are determined for the shoe size and the right and left of the shoe upper C1, and are appropriately selected from these sewing pattern data.

The CPU 91 reads the selected sewing pattern data according to the control program, and calculates the movement of the swing motor 73 and the axis for each stitch in order to position the shoe upper C1, the reinforcing material C2, and the label C3 at each needle drop position constituting the sewing pattern. The operation amount of the motor 83 is driven and controlled in synchronization with the sewing machine motor 12 so that the swing motor 73 and the axial movement motor 83 have the calculated operation amount for each stitch.

[Sewing preparation and sewing operation]

The flow from the preparatory work when sewing the reinforcing material C2 and the label C3 to the shoe upper C1 of the sewing machine 100 to the sewing work will be described.

First, one end of the shoe upper C1 and the reinforcing material C2 are set in the first clamping mechanism 30 , and the other end of the shoe upper C1 and the label C3 are set in the second clamping mechanism 50 .

That is, with respect to all the clamp units 40A to 40D of the first clamp mechanism 30 , the operation lever 433 is lifted to bring the upper clamp member 41 into the released state. Subsequently, the shoe upper C1 and the reinforcing material C2 are overlapped in the aligned state after seaming, placed on the lower clamping member 42, the operation lever 433 is brought down, and the upper clamping member 41 and the lower clamping member 41 are passed through. The clamping part 42 is clamped.

Each of the clamp units 60A to 60C of the second clamp mechanism 50 clamps the shoe upper C1 and the tag C3 in the same manner.

Subsequently, the first clamping mechanism 30 and the second clamping mechanism 50 are installed on the swing frame 71 of the swing mechanism 70 through the toggle mechanism 711 .

When the above-mentioned preparatory work is completed and the sewing pattern data is selected from the setting switch 95 of the sewing machine 100, the CPU 91 calculates the movement amount of the swing motor 73 and the axial movement motor 83 for each stitch.

And, if the start of sewing is input by operating the pedal 98, the CPU 91 starts the driving of the sewing machine motor 12, and moves the swing motor 73 and the axis moving motor 83 with the calculated movement amount for each needle synchronously with the up and down movement of the needle bar. Drive to make the shoe upper C1, reinforcing material C2 and label C3 swing and move the axis, and the needles are sequentially dropped at the needle dropping positions determined by the sewing pattern data.

Then, when the needles are dropped at all the needle dropping positions specified by the sewing pattern data, the sewing machine motor 12 is stopped, and the sewing operation is completed.

Then, the first clamp mechanism 30 and the second clamp mechanism 50 are detached from the swing frame body 71, and the upper clamp member 41 is loosened with respect to all the clamp units 40A to 40D of the first clamp mechanism 30 . open state. Similarly, all the clamp units 60A to 60C of the second clamp mechanism 50 are set to the released state.

In this way, the shoe upper C1 after the reinforcement material C2 and the label C3 are sewn together can be removed, and a series of sewing operations are completed.

[Effect of Embodiment]

As described above, regarding the first clamping mechanism 30 of the sewing machine 100, the frame 31 has the elongated mounting holes 32 to 35 formed along a plurality of straight lines arranged to imitate a circular arc. The clamping mechanism 30 is installed with four clamping units 40A- 40D in a position-adjustable manner along the mounting holes 32 - 35 of the frame 31 .

In addition, the second clamping mechanism 50 is also the same. The frame 51 has long hole-shaped mounting holes 52 to 55 formed along a straight line. The units 60A to 60C are mounted with three clamping units 60A to 60C in a position-adjustable manner along the mounting holes 52 to 55 of the frame 51 .

Thereby, each clamping unit is arrange|positioned so that it can correspond to the curved surface of various sizes, and a to-be-sewn object can be hold|maintained along a curved surface, and the support body corresponding to each size individually is unnecessary. In particular, regarding the sewing of shoes, although the sizes of the objects to be sewn are finely classified, in the first and second clamping mechanisms 30, 50, by adjusting the positions of the clamping units, it is possible to maintain It is especially effective for sewing objects of various sizes.

In addition, the first and second clamping mechanisms 30, 50 form the lower surfaces of the upper clamping members 41, 61 and the lower clamping members 42, 62 of each clamping unit 40, 60 by one or two planes. The upper surface, so each clamping part can be processed easily. In particular, when formed by two or more planes, the object to be sewn can be held in a state closer to a curved surface, and good sewing can be performed on an object to be sewn with a curved surface shape.

In addition, the upper clamping members 41, 61 and the lower clamping members 42, 62 of the first and second clamping mechanisms 30, 50 are configured to be positionally adjustable in the extending direction.

Therefore, the extension amount of each clamp member 41 , 42 , 61 , 62 can be adjusted arbitrarily, and the clamp width realized by the upper clamp members 41 , 61 and the lower clamp members 42 , 62 can be adjusted. Therefore, favorable clamping can be performed on various sewn objects of different sizes.

In addition, the sewing machine 100 is provided with a swing mechanism 70 for swinging the first and second clamp mechanisms 30, 50 around an axis located on a circle along the upper mounting holes 32, 33 of the frame 31 of the first clamp mechanism 30. Arc A1, and arc A2 along the lower side mounting holes 34, 35, arc A3 of the frame 51 of the second clamping mechanism 50 along the upper side mounting holes 52, 53, and the arc A3 along the lower side mounting holes 54, 55. The entire center of the arc A4; the axis moving mechanism 80, which moves the first and second clamping mechanisms 30, 50 along the axis of the swing of the first and second clamping mechanisms 30, 50; and the control device 90, which controls They control and drop the needle to any position of the object to be sewn.

Therefore, by combining the swing and the linear movement, it is possible to accurately drop the needle on the curved surface of the object to be sewn, and it is possible to improve the sewing quality.

In addition, in the sewing machine 100 described above, by sequentially storing the needle drop positions by sewing pattern data and the like, it is possible to automatically sew the sewing pattern on the curved surface.

In addition, the sewing machine 100 includes the intermediate presser foot 11 that moves up and down in conjunction with the needle bar, so that the sewing needle after the needle drop can be pulled out more reliably from the sewing object that moves and swings along the swing axis. , can prevent damage to the sewing object and sewing needle, and perform a good moving action of the sewing object.

[Evasion Guidance Department]

In addition, when the shoe upper C1 as the to-be-sewn object is set on the first clamp mechanism 30 and has the toe C11 as the hanging portion in a hanging state, a high needle drop point is provided directly below the shoe upper C1 as the needle drop position. The seam 24 may interfere with the toe C11.

Therefore, as shown in FIG. 10 , a pair of avoidance guides 38 and 39 may be provided on the frame 31 of the first clamping mechanism 30, and the pair of avoidance guides 38 and 39 are used to move the toe C11 to one of the swing axis directions. side (in this case the side of the frame 31) close.

The avoidance guide parts 38, 39, in order to avoid the interference between the whole guide part and the high seam platform 24 when the first clamping mechanism 30 swings, the direction of the first clamping mechanism 30 in the direction of the swing axis and the frame 31 In a state where the opposite side of the side moves the most, the high-slit table 24 is disposed further on the frame 31 side than the end surface on the frame 31 side in the swing axis direction of the high-slit table 24 .

Thereby, at the time of sewing, the occurrence of interference between the toe C11 and the high sewing base 24 can be reduced, and good sewing can be performed.

In addition, the avoidance guides 38 and 39 have a structure to bring the toe C11 closer to the frame side, but may also have a structure to make the toe C11 closer to the opposite side in the swing axis direction.

In addition, although the evacuation guide parts 38 and 39 are formed in a rod shape, they may be formed in a plate shape. In addition, although the case where two evacuation guide parts 38 and 39 were provided was illustrated, only one or three or more may be provided.

In addition, the evasion guides 38 and 39 are not limited to the first clamp mechanism 30 , and may be provided on the second clamp mechanism 50 .

[bulge]

As shown in Figure 11, a kettle 14 is built in inside the top of the high seam platform 24, and a needle plate 15 is provided on the upper end of the high seam platform 24, and the needle plate 15 is formed with a needle drop for sewing needles 13. hole (not shown).

In addition, since the reinforcing material C2 and the label C3 of the object to be sewn are held by the first or second clamping mechanisms 30 and 50 along the curved surface, there will be a gap between the reinforcing material C2 or the label C3 and the needle plate 15. gap.

In this case, if the intermediate presser 11 descends, sewing will be performed with the reinforcing material C2 or the label C3 bent downward in order to press the gap, and therefore good sewing may not be possible.

In addition, in order to eliminate the gap, if the reinforcing material C2 or the label C3 is made to be as close as possible to the needle plate 15, it is possible that the needle plate 15 and the reinforcing material C2 or the label C3 will be closed when the first or second clamping mechanism 30, 50 swings. Sliding contact displaces them from the clamping mechanisms 30, 50, or damages the reinforcing material C2 or label C3.

Therefore, in the case of using the middle presser foot 11, a raised portion 16 protruding upward is provided around the needle drop position of the needle plate 15, and through the raised portion 16 and the lowered middle presser foot 11, the needle can be seen from above and below. It is more preferable to press and sew the reinforcing material C2 and the label C3.

As described above, by providing the raised portion 16, the downward deflection of the reinforcing material C2 and the label C3 caused by the intermediate presser foot 11 can be suppressed, and the sewing can be performed while maintaining a state close to the curved surface, thereby realizing a more stable state. good sewing.

In addition, the protrusion 16 can reduce the occurrence of sliding contact between the reinforcing material C2, the label C3, and the needle plate 15. As shown in FIG.

[other]

The upper installation holes 32, 33, 52, 53 and the lower installation holes 34, 35, 54, 55 of the first and second clamping mechanisms 30, 50 formed on the frames 31, 51 are set as one or two straight lines. shape, but also can be set as more straight lines, or arcs or curves other than arcs.

In particular, when the shape of the object to be sewn is a curved surface other than a curved surface having an arc-shaped cross section, it is preferable to make each attachment hole a curved shape corresponding to the cross-sectional shape of the curved surface.

In addition, the position of the swing axis formed by the swing mechanism 70 is preferably the center of the arc along which each mounting hole is located, but may be closer to the arc than the center.

In addition, when the shape of the attachment hole is not an arc shape but a concave shape, the swing axis may be arranged inside the concave shape.

In addition, the lower surface of the upper clamp member and the upper surface of the lower clamp member are not limited to one or more than two planes, and may be formed by one curved surface. By making these curved surfaces, the to-be-sewn object can be hold|maintained in the state along a curved surface, and a more favorable sewing can be performed.

In addition, in the first clamping mechanism 30 and the second clamping mechanism 50, the individual number of clamping units may be at least two or more, and may be increased or decreased.

In addition, each clamp member is not limited to the case of a plate shape. For example, the upper and lower clamp members may be constituted by a pair of rods. In this case, the number of individual clamping units is larger, and it is preferable to further increase the number of clamping locations clamped by the rod.

In addition, in the above-mentioned embodiment, the case where sewing is performed using both the first clamp mechanism 30 and the second clamp mechanism 50 has been exemplified, but only the first clamp mechanism 30 or the second clamp mechanism 50 can also be used. One of the tightening mechanisms 50 is attached to the sewing machine 100 for sewing.

In addition, the axis moving mechanism 80 moves each of the clamping mechanisms 30 and 50 in the axial direction. The needle swing mechanism is mounted on the sewing machine 100 .

Claims (8)

1. a clamp system, it is characterised in that possess:

Multiple clamping units, they have by sewn object clamp a pair clamping part and The bracer that the pair of clamping part is supported；And

Framework, described bracer of its installation,

Described framework has the installing hole of one or more elongated hole-shape, and this installing hole is along bending Curve or a plurality of straight line and formed, wherein, described a plurality of straight line is the song along this bending Line,

It is installed as the plurality of clamping unit to carry out position along the installing hole of described framework Regulation.

Clamp system the most according to claim 1, it is characterised in that

The clamping face of described clamping part is made up of one or more plane.

Clamp system the most according to claim 1, it is characterised in that

The clamping face of described clamping part is made up of a curved surface.

Clamp system the most according to any one of claim 1 to 3, it is characterised in that

The pair of clamping part extends to described framework opposition side at described bracer,

The pair of clamping part is supported for by described bracer can be along the pair of clamping section The bearing of trend of part carries out position adjustments.

Clamp system the most according to any one of claim 1 to 3, it is characterised in that

Possessing and dodge guide portion, this dodges guide portion for making from by described clamping part clamps The vertical portion that hangs down of sewn object, dodge from needle downing position.

6. a sewing machine, it is characterised in that possess:

Swing mechanism, it makes the clamp system according to any one of claim 1 to 5 around axle String pendulum moves, and this axis is positioned at the inner side of the curve of the bending of the installing hole of described framework；

Axis travel mechanism, its described axis swung along described clamp system makes this clamping machine Structure and needle bar relatively move；And

Controlling device, it drives source and described axis travel mechanism to described swing mechanism Driving source is controlled, and carry out falling pin to the arbitrary position of described sewn object.

Sewing machine the most according to claim 6, it is characterised in that

Possessing middle presser feet, in this, presser feet moves up and down in linkage with described needle bar.

Sewing machine the most according to claim 7, it is characterised in that

Possess the needle plate carrying out falling pin,

Needle downing position at described needle plate is provided with lobe, and this lobe is described with decline Middle presser feet co-operating and from above and below described sewn object is pressed.