JP3647900B2 - Sewing material holding device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a workpiece holding device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, an electronic cycle sewing machine or the like has been provided with a workpiece moving device that performs shape sewing by moving a workpiece to be moved relative to a sewing needle based on sewing data. The article moving device is provided with means for holding and releasing a cassette for holding a sewing product with respect to a carriage moving in the XY directions.
[0003]
For example, this means moves at least one of the pair of claw supports provided on the carriage side in a plane parallel to the table with respect to the pair of claws provided on the cassette side. The claw and claw holders can be engaged / released, and cassettes of various sizes can be held / released on the carriage.
[0004]
[Problems to be solved by the invention]
However, the above means have the following problems.
That is, the cassette is held by a force acting in the direction parallel to the table (lateral force) with respect to the carriage, and in the vertical direction, it is stopped only by the sliding frictional force between the pawl and the pawl holder. In contrast, there is no force acting toward the table side, and there are some irregularities on the table surface, so the cassette actually floats on the table. When the cassette is intermittently driven, there is a problem that the cassette slightly vibrates up and down, noise is generated, and sewing is not performed cleanly. In addition, since the cassette slightly vibrates up and down, there is a problem that the moving speed cannot be increased.
[0005]
Here, Japanese Patent Laid-Open No. 4-24079 proposes a sewing object holding device having means for pressing a holding frame for holding the sewing object against the upper surface of the table. This means, for example, by converting a reciprocating linear motion such as a solenoid into a rotational motion by a linear-rotational motion conversion mechanism, rotating the auxiliary clamp member, and pressing the upper surface of the upper portion of the upper cloth holding frame, The sewing frame is securely held by the holding frame. If this means is used, the purpose is different, but the holding frame is pressed against the table as a result, so that the fine vibration of the holding frame is reduced. It is considered possible.
[0006]
However, the apparatus described in JP-A-4-24079 has the following problems.
That is, since a linear-rotation motion conversion mechanism, an auxiliary clamp member, and the like are required, there is a problem that the number of parts increases and the structure becomes complicated.
[0007]
In addition, from the viewpoint of the purpose, since it is configured to press the upper surface of the intermediate portion of the upper cloth holding frame, the entire cassette cannot be pressed against the table, and the fine vibration above and below the cassette cannot be completely eliminated. There is also.
[0008]
Therefore, the present invention has a simple structure, presses the entire cassette against the table, eliminates the fine vibrations of the upper and lower sides of the cassette, eliminates noise and increases the speed, and allows the sewing to be performed neatly. An object is to provide a sewn product holding device.
[0009]
It is another object of the present invention to provide a sewn product holding device that reduces overshoot of intermittent motion and improves feed accuracy by pressing the entire cassette against a table.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a sewing product holding device according to the present invention includes a cassette capable of detachably holding a sewing product, a holder portion provided in the cassette , and movable in an XY direction. an engaging portion receiving provided on the carriage, the holder portion, and the engaging portion provided to be engaged with the engaging portion receiving said carriage, said engaging the engagement portion receiving in a plane parallel to the tables by moving, and means for enabling holding and releasing the holder portion to said carriage as enabling engagement and disengagement between the engaging portion receives said engaging portion and presses against the holder portion in the table And a pressing means, wherein the holder portion projects from the end portion of the cassette , and the engaging portion receiver receives a linear force in the X direction parallel to the table. To act Is configured to Zehnder portion to chucked held releasably laterally, said pressing means, the holder portion linearly pressed directly towards the table to crimp the whole of said cassette on said table It is provided in the carriage or the holder so as to be lowered to a state where the ridges are assembled .
[0012]
[Action]
According to such a sewing product holding apparatus according to the present invention, when the holder portion of the cassette that is cantilevered by the carriage is pressed toward the table, the cassette is in a state in which the ridges are also assembled into a hook and the whole is placed on the table. It comes to be pressed. Further, since the pressed toward the direct holder on the table by the pressing means, linear - rotation motion converting mechanism, auxiliary clamping member or the like is unnecessary ing. When the entire cassette is pressed against the table, the carriage receives a reaction force from the table, and this reaction force reduces the overshoot of the intermittent motion.
[0013]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, referring to FIGS. 4 to 6, a description will be given below of a sewing product moving device to which a sewing product holding device according to an embodiment of the present invention is applied and an electronic cycle sewing machine having the sewing product moving device. .
[0014]
The electronic cycle sewing machine is provided with a workpiece holding equipment below occupying perform shape sewing by moving the workpiece based on the sewing data.
[0015]
In FIG. 4, reference numeral 1 denotes a table as a machine base. A sewing machine body 2 is provided on the table 1, and a needle 3 that forms a stitch forming means together with a hook (not shown) at the front end of the table. Is provided.
[0016]
At the left and right ends of the table 1 in front of the sewing machine main body 2, support bodies 4 and 5 (shown by dotted lines in order to avoid complexity) are formed in the front-rear direction. They are fixedly arranged so as to extend in parallel with each other (Y direction; one direction) (the fixed portion with respect to the table 1 is cantilevered only at the rear end in the figure), and fixed racks 6 and 7 are provided on the inner side surfaces thereof. Are attached so as to extend in parallel to the Y direction.
[0017]
A connecting shaft 50 is disposed in front of the sewing machine body 2 so as to extend parallel to a direction (X direction) orthogonal to the fixed racks 6 and 7. The connecting shaft 50 is divided into two at the central portion of the shaft, and the divided connecting shafts 14 and 13 are connected to each other by, for example, a fixed shaft joint (rigid coupling) 15 as a joint mechanism portion. It is in a state. Gears 8 and 9 are respectively fixed to the end portions (left and right ends) of the connecting shafts 14 and 13, and these gears 8 and 9 are engaged with the fixed racks 6 and 7, respectively. Accordingly, even if the tooth surfaces of the left and right fixed racks 6 and 7 are shifted, the rigid coupling 15 can easily adjust the meshing between the fixed racks 6 and 7 and the gears 8 and 9. Yes. Further, since the connecting shafts 14 and 13 are connected by the rigid coupling 15, the rotational transmission force is stronger than that of, for example, a flexible shaft coupling (Oldham coupling).
[0018]
A Y moving frame 12 extends in the X direction further forward of the connecting shaft 50. As shown in FIGS. 4 and 6, protrusions 12 a and 12 b projecting upward are provided at the left and right ends of the Y moving frame 12 in the drawing (in FIG. 4, the drawing is avoided from being complicated). Therefore, the protrusion 12a is omitted and the protrusion 12b is indicated by a dotted line), and the connecting shafts 14 and 13 are rotatably supported by the protrusions 12a and 12b.
[0019]
The shaft portions of the cam followers (rotating support members) 10 and 11 are fixed above the support points for the connecting shafts 14 and 13 in the protrusions 12a and 12b (see FIGS. 4 and 6). The fixed racks 6 and 7 are arranged so as to contact the upper surfaces of the fixed racks 6 and 7, respectively. That is, the fixed racks 6 and 7 are sandwiched between the cam followers 10 and 11 and the gears 8 and 9, respectively, so that the fixed racks 6 and 7 and the gears 8 and 9 are engaged with each other reliably.
[0020]
A first screw gear (spiral gear) 16 is fixed to the end of the connecting shaft 13, and the first screw gear 16 is rotated by a connecting shaft rotation driving means 51. . The connecting shaft rotation driving means 51 includes a Y-axis drive motor 21 fixed on the table 1, a reduction gear 23 meshing with a gear 22 fixed to the output shaft of the Y-axis drive motor 21, and the reduction gear 23. And a Y-axis drive shaft 17 in which both shaft ends are rotatably supported on the table 1 and splines are formed on portions other than both shaft ends, and the splines of the Y-axis drive shaft 17 are fitted. The outer cylinder portion 17a that rotates with the Y-axis drive shaft 17 and is slidable with respect to the Y-axis drive shaft 17, and as shown in FIG. 5, is keyed to the outer cylinder portion 17a and the first screw. The second screw gear 18 that meshes with the gear 16 and the collars 19 and 20 that sandwich the second screw gear 18 from the front-rear direction and are rotatably supported by the protrusions 12b of the Y moving frame 12. Yes.
[0021]
As shown in FIG. 5, a guide rail 24 is fixed to the lower surface of the Y moving frame 12 along the longitudinal direction (X direction). Further ahead of the guide rail 24 and the Y moving frame 12, the guide rail 24 and the Y moving frame 12 are surrounded in the vertical direction by both side plates (upper and lower plates in FIG. 5) 52 a and 52 b having a U-shaped section. An X moving frame 52 as a carriage (also referred to as a top table) is disposed, and is supported on the lower side plate 52b of the X moving frame 52 so as to be slidable with respect to the guide rail 24. The slide unit 25 is fixed.
[0022]
A part of the timing belt 28 is fixed on the upper side plate 52a of the X moving frame 52, and this timing belt 28 is stretched over the drive sprocket 29 on the left side of FIG. 4 and the driven sprocket 30 on the right side of FIG. . The driven sprocket 30 is rotatably supported by a protrusion 12c formed on the Y moving frame 12. For example, a long hole is formed in the X direction of the protrusion 12c so that an appropriate tension can be applied to the timing belt 28. It is supported so that movement is possible.
[0023]
As shown in FIG. 4, the driving sprocket 29 is rotated by a timing belt rotation driving means 53. The timing belt rotation driving means 53 includes an X-axis drive motor 36 fixed on the table 1, a reduction gear 34 meshing with a gear 35 fixed to the output shaft of the X-axis drive motor 36, and the reduction gear 34 The X-axis drive shaft 31 having both ends of the shaft rotatably supported on the table 1 and having splines formed on portions other than the ends of both shafts, and the splines of the X-axis drive shaft 31 are fitted. As shown in FIG. 6, the outer cylinder portion 31a that rotates with the X-axis drive shaft 31 and is slidable with respect to the X-axis drive shaft 31, the drive sprocket 29 keyed to the outer cylinder portion 31a. In addition, the drive sprocket 29 is sandwiched from the front-rear direction, and the collars 32 and 33 are rotatably supported by the protrusions 12a of the Y moving frame 12.
[0024]
Next, the structure of the sewing object holding device that characterizes the present invention will be described below.
An attachment / detachment device 27 constituting a carriage is fixed below the lower side plate 52b of the X moving frame 52. At the end in the longitudinal direction (X direction) of the attachment / detachment device 27, as shown in FIGS. 1 to 3, a pair of hook-shaped claw receivers 27 b and 27 c as engaging part receivers are parallel to the table 1. In the plane, the ridges are spaced apart from each other. One claw receptacle 27b is fixed to the attachment / detachment device 27, and the other claw receptacle 27c is movable in the X direction by a chuck cylinder 27a fixed to the attachment / detachment device 27.
[0025]
A pair of brackets 27d and 27e are erected apart from each other at the front end (front side in the figure) of the detachable device 27, and a pair of brackets 27d and 27e as a holder portion pressing means are provided on the front side surface. The body portions of the air cylinders 27f and 27g are fixed to each other. For example, rubber materials 27h and 27i as shock absorbing members are attached to the piston tips of the air cylinders 27f and 27g, respectively. When the cassette is mounted, the piston tips of the air cylinders 27f and 27g (actually the rubber material 27h 27i) and the upper surface of a holder portion 26a described later are set so as to face each other.
[0026]
On the other hand, a holder portion 26a is long in the X direction and protrudes upward at the front end portion of the cassette 26, which holds the sewing product detachably by sandwiching or dropping the sewing product. A pair of hook-like claws 26b, 26c as engagement parts having a shape matching the claw receptacles 27b, 27c are provided at both ends of the holder part 26a so that the hooks face each other. Spacing is fixed.
[0027]
In FIGS. 4 and 5, the air cylinders 27f and 27g, the brackets 27d and 27e, etc. are not drawn in order to avoid complication of the drawings.
[0028]
Next, operations of the sewing object holding device and the sewing object moving device configured as described above will be described below.
First, since cassettes of various sizes are attached to the attachment / detachment device 27, the claw receiver 27c is initially retracted by the chuck cylinder 27a. Next, the cassette 26 is pushed rearward from the near side and set so that the claw 26b is hooked on the claw receiver 27b. Next, the chuck cylinder 27a is driven to project the claw receiver 27c, and the claw 26c and claw receiver 27c. Is brought into an engaged state, and the holder 26 a (cassette 26) is held by the attaching / detaching device 27. That is, a linear force is applied to the claws 26b and 26c in the X direction parallel to the table 1 (chucking from the lateral direction), and the holder 26a is held by the attaching / detaching device 27.
[0029]
At this time, the upper surface of the holder portion 26a and the piston tip portions of the air cylinders 27f and 27g are in an opposing state. Accordingly, when the air cylinders 27f and 27g are driven to lower the piston, the rubber materials 27h and 27i come into contact with the upper surface of the holder portion 26a, but the claws 26b and 26c and the claw receivers 27b and 27c slip in the vertical direction. Since it is stopped only by the frictional force, the entire cassette 26 is lowered until it is crimped onto the table 1.
[0030]
Incidentally, the cylinder force per place at this time is 8 to 10 kg in this embodiment. Further, an impact is applied to the piston tip portions of the air cylinders 27f and 27g when contacting the holder portion 26a or when moving by a moving device described later. In this embodiment, rubber materials 27h and 27i are applied to the piston tip portions. Since this is provided, this shock is absorbed.
[0031]
When a drive signal is input to the Y-axis drive motor 21 and the X-axis drive motor 36 based on a sewing program corresponding to a predetermined sewing pattern, the Y-axis drive motor 21 and the X-axis drive motor 36 start rotating. . When the Y-axis drive motor 21 rotates, the Y-axis drive shaft 17 and the second screw gear 18 rotate via the gear 22 and the reduction gear 23, and the first screw gear 18 rotates with the first screw gear 18. The screw gear 16 and the connecting shafts 14 and 13 rotate, the gears 8 and 9 move in the Y direction by meshing with the fixed racks 6 and 7, and the connecting shafts 13 and 14 also move in the Y direction. Along with this movement, the outer cylinder portion 17a, the second screw gear 18, and the collars 19 and 20 move in the Y direction while rotating, and the Y moving frame 12 moves in the Y direction along with these movements. At this time, with respect to the X-axis drive shaft 31, the outer cylinder portion 31a, the drive sprocket 29, and the collars 32 and 33 slide on the X-axis drive shaft 31 as the Y moving frame 12 moves in the Y direction. Move in the direction. As the Y moving frame 12 moves, the X moving frame 52, the attachment / detachment device 27, and the cassette 26 move in the Y direction.
[0032]
When the X-axis drive motor 36 is driven, the X-axis drive shaft 31 and the drive sprocket 29 are rotated via the gear 35 and the reduction gear 34, and the timing belt 28 is rotated along with the rotation of the drive sprocket 29 and the driven sprocket 30. While moving in the X direction, the slide unit 25 slides in the X direction with respect to the guide rail 24, so that the X moving frame 52, the attaching / detaching device 27, and the cassette 26 move in the X direction.
[0033]
That is, the cassette 26 can smoothly move to a predetermined position in the X and Y directions while being pressed against the table 1 as a whole. Furthermore, in this embodiment, since a throat plate auxiliary sheet made of, for example, a polyester film having a thickness of 0.125 mm is laid on the table 1, the cassette 26 can move on the table 1 very smoothly. Yes.
[0034]
As described above, in the present embodiment, the cassette 26 capable of detachably holding the sewing product, the holder portion 26a projecting from the end of the cassette 26, and the carriage 52 movable in the XY direction. 27, and means 27a (26b, 26c, 27b, 27b, 26b, 26b, 27b, 27b) that can hold and release the holder portion 26a by applying a linear force in the X direction parallel to the table 1 to the holder portion 26a. 27c) and means 27f, 27g for pressing the holder portion 26a toward the table 1, the holder portion 26a of the cassette 26 cantilevered by the carriages 52, 27 is directed toward the table 1. When the cassette 26 is moved, the cassette 26 is in a state in which a basket is assembled and the entire table is pressed against the table. Gone, with which is possible to eliminate and speed of sound, it is possible to perform the clean sewing.
[0035]
Further, since the holder portion 26a is directly pressed against the table 1 by the pressing means, a linear-rotation motion conversion mechanism, an auxiliary clamp member, and the like as in the device described in JP-A-4-24079 are not required. In addition, the number of parts can be reduced and the configuration can be simplified.
[0036]
In addition, since the entire cassette 26 is pressed against the table 1, the carriages 52 and 27 receive a reaction force from the table 1, and this reaction force can reduce the overshoot of the intermittent motion. The accuracy can be improved.
[0037]
4 are not supported by the table 1 and are free, so that a cylinder is provided at each of these portions, and the table 1 is respectively moved by the cylinder. If the support bodies 4 and 5 are in the state of being supported at both ends, the vibration of the drive system of the workpiece moving device can be reduced, and the effects of the above embodiments can be further enhanced.
[0038]
Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say, for example, in the above-described embodiment, the throat plate auxiliary sheet is a polyester film, but is not limited to this. For example, other materials may be used as long as they are slippery and durable. It doesn't matter.
[0039]
In the above embodiment, the air cylinders 27f and 27g are provided on the carriage side to press the holder portion 26a toward the table 1. However, the air cylinders 27f and 27g are provided on the holder portion 26a. It is also possible to provide a receiving plate on the carriage side, on which the piston tip portions of the air cylinders 27f and 27g can come into contact with each other during driving, and press the holder portion 26a toward the table 1.
[0040]
Further, the number of air cylinders 27f and 27g is not limited to two, and a spring, a solenoid, or the like can be used instead of the air cylinder. Further, if, for example, polycarbonate or the like is used as the reinforced plastic instead of the rubber materials 27h and 27i at the piston tips of the air cylinders 27f and 27g, durability can be improved.
[0041]
In addition, a rotatable roller or sphere that is partially exposed on the table 1 is provided, or a rotatable roller or sphere is provided on the lower surface of the cassette 26 so that the cassette 26 can easily slide on the table 1. good.
[0042]
Furthermore, the sewn product holding device of the present invention is not only applied to the sewn product moving device of the above embodiment, but can be applied to sewn product moving devices of other configurations, of course. It can also be applied to sewing machines other than electronic cycle sewing machines.
[0043]
【The invention's effect】
As described above, according to the sewing object holding device according to the present invention, the cassette capable of detachably holding the sewing object, the holder portion protruding from the end of the cassette, and the XY direction Means for holding and releasing the holder part by applying a linear force to the holder part in the X direction parallel to the table, and the holder part to the table. Means for pressing toward the table, so that the holder portion of the cassette that is cantilevered by the carriage is pressed toward the table, and the entire cassette is pressed against the table in a state in which the basket is also assembled. As a result, there is no fine vibration in the vertical direction when the cassette is moved, noise can be eliminated and the speed can be increased, and sewing can be performed neatly.
[0044]
Further, since the holder portion is directly pressed against the table by the pressing means, a linear-rotation motion conversion mechanism, an auxiliary clamp member, etc. as in the device described in Japanese Patent Laid-Open No. 4-24079 are not required, and the parts The number of points can be reduced and the configuration can be simplified.
[0045]
Further, since the entire cassette is pressed against the table, the carriage receives a reaction force from the table, and this reaction force can reduce the overshoot of the intermittent motion and improve the feeding accuracy.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a state before a cassette is mounted in a sewing product holding apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view showing a state after the cassette is mounted on the sewn product holding device.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a perspective view of an electronic cycle sewing machine having a sewing product moving apparatus to which the sewing product holding device is applied.
FIG. 5 is a partial cross-sectional side view of the above-described sewing product moving apparatus as seen from the direction AA.
FIG. 6 is a partial cross-sectional plan view of the same workpiece moving device as seen from the BB direction.
[Explanation of symbols]
26 Cassette 26a Holder part 26b, 26c Engagement part 27, 52 Carriage 27a Holder part holding / release means 27b, 27c Engagement part receiver 27f, 27g Holder part pressing means

Claims (1)

A cassette capable of detachably holding a sewing product;
A holder provided in the cassette;
An engaging portion receiver provided on a carriage movable in the X-Y direction;
An engagement portion provided on the holder portion so as to be engageable with an engagement portion receiver of the carriage;
By moving in a plane parallel to said engaging portion receiving the tables, the carriage to the holder portion holds and releasably as enabling engagement and disengagement of the engagement portion and the engaging portion receives Means to
Pressing means for pressing the holder part toward the table ;
In the sewn product holding device comprising:
The holder part protrudes from the end of the cassette ,
The engagement portion receiver is configured to chuck the holder portion so that the holder portion can be held and released from the lateral direction by applying a linear force in the X direction parallel to the table.
The carriage or the holder is configured so that the pressing means linearly presses the holder portion linearly toward the table and lowers the entire cassette until it is crimped onto the table to form a ridge. A sewn product holding device provided on the sewing machine.

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