JPH06262420A - Working device for holding tool for stuff to be sewn in automatic sewing equipment - Google Patents

Abstract

PURPOSE:To facilitate the adjusting work for the cutting depth by an end mill in cutting the pattern groove hole along the sewing pattern in a cloth pressing plate to be used in an automatic sewing equipment. CONSTITUTION:A driving motor 32 which is provided with an end mill 30 on the lower end is elevatably mounted on the front surface of a supporting plate 26 mounted on a sewing machine head through a pair of right and left guide plates 37, 37. A connecting member 34 which is vertically moved in an integrated manner with the driving motor 32 is vertically elevated relative to the surface of a cloth pressing plate by an actuator 42 mounted on the supporting plate. An end surface cam body 50 pivotably supported in a turnable manner by a supporting shaft 49 projected on the surface of the supporting plate 26, and the cam surface of this end surface cam body 50 is arranged so as to be opposite to an abutting part 34a of the connecting member 34. On the other hand, the turning phase of the end surface cam body 50 is made adjustable by a grip handle 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stitch forming command for moving a sewing object holder formed by sandwiching a cloth between a plurality of cloth pressing plates in the XY directions according to a sewing pattern and vertically driving a sewing needle. The present invention relates to a device for cutting a pattern groove hole in a workpiece holder in order to sew according to a sewing pattern, etc. in an automatic sewing device that changes and forms continuous stitches on a workpiece. More specifically, the present invention relates to an apparatus for adjusting the cutting depth by a cutting tool such as an end mill.

[0002]

2. Description of the Related Art Generally, in this type of automatic sewing device, pattern groove holes at the portions to be sewn are preliminarily formed in two cloth pressing plates of the workpiece holder (cloth cassette). In order to sew along the pattern slot, the sewing machine holding tool is moved in the X and Y directions along the surface of the table by a read signal from the sewing program storage device provided in the automatic sewing device. The carriage is driven to sew the sewn product along the contours of the collar and pockets of the shirt. In that case, the object to be sewn (cloth) is sandwiched between the two cloth pressing plates so that the object to be sewn is not displaced and wrinkles do not occur.

As a prior art of a cutting apparatus for forming a pattern groove hole in the cloth pressing plate, for example,
In Japanese Unexamined Patent Publication No. 52-103256, a support plate is attached to the front surface of a sewing machine head of an automatic sewing machine (automatic sewing machine), and an end mill is attached to a chuck that is rotatably driven by a drive motor that is vertically movable on the support plate. Data of the sewing contour (pattern) stored in the sewing program storage device by attaching two cloth pressing plates, which are the workpiece holders, while protruding downward, to the carriage that moves in the X direction and the Y direction. It is disclosed that the carriage is moved in the XY directions by utilizing the above to form a predetermined pattern slot.

In this prior art, in order to regulate the cutting depth of the end mill, a pair of left and right long vertical holes are formed in the mounting base of the drive motor with the chuck, and fastening bolts inserted through the both vertical vertical holes are provided. The mounting base can be vertically adjusted and fixed in position with respect to the support plate.

[0005]

However, in adjusting the vertical position of the mounting base by means of the vertically elongated holes and the fastening bolts, once the fastening bolts are loosened, the mounting base falls to the stopper position that regulates the lowest position. The mounting base must be held parallel to the reference plane by hand, and the two mounting bolts must be tightened while the positioning and holding of the mounting base is done by hand so that the specified cutting depth is achieved. No
There has been a problem that it is extremely difficult to perform depth adjustment of minute dimensions.

Further, when the thickness of the cloth pressing plate which is the workpiece holder is large, the above-mentioned manual work must be repeated many times in order to adjust the cutting depth by the end mill stepwise. Therefore, there is a problem that the work of adjusting the cutting depth is extremely time-consuming. The present invention solves these problems,
It is an object of the present invention to provide a cutting device for a workpiece holder, the cutting depth of which can be adjusted by a simple operation.

[0007]

In order to achieve the above object, a cutting device for a sewing machine according to the present invention forms a seam at a relative position between the axis of a sewing needle and the sewing machine. In an automatic sewing device that changes continuous stitches on a sewn object according to a command, a processing tool for cutting the sewn object holder, and the processing tool perpendicular to the sewn object holder. Direction guide means, an actuator for vertically moving the processing tool up and down with respect to the workpiece holder, and a cutting depth of the processing tool into the workpiece holder is variably regulated. It is provided with a stopper means to operate.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the automatic sewing machine, and FIG. 2 is a side view of the sewing machine. At the front of the table 4 extending forward. A sewing needle 6 attached to the lower end of a needle bar 5 that moves up and down via a main shaft (not shown) in the sewing machine arm 1 is a hook device of a bed portion which faces a lower position of the sewing machine head 3 below a table 4. (Not shown) is moved up and down to sew a cloth (not shown), which is a sewn object sandwiched between the sewn object holders 7 in FIG. 1, in a predetermined sewing pattern.

As shown in FIG. 1, the moving mechanism for moving the workpiece holder 7 in the X and Y directions along the upper surface of the table 4 includes a guide rail 8 extending in the X direction and right and left of the guide rail 8. The guide rail 8 is attached to the pair of left and right arms 10 and 10 so as to be slidable forward and backward (Y direction) along the guide rails 11 and 11. It is mounted and driven by a Y moving mechanism (not shown) including a Y motor, a drive shaft 12 and a belt 13. Further, a driving force from an X motor (not shown) is transmitted so as to rotate the driving shaft 14 arranged in parallel with the extending direction of the sewing machine arm 1, and the driving shaft 1 is rotated.
The carriage 9 is moved in the X direction via a pinion 15 provided at the tip of the carriage 4 and an X moving mechanism such as a rack provided on the back surface of the carriage 9. These movement controls execute intermittent operations of forward and reverse rotations of the X motor and the Y motor based on a signal from a sewing pattern storage device built in the automatic sewing device. As a result, the relative position between the axis of the sewing needle 6 and the workpiece holder 7 can be changed according to the stitch formation command to form continuous stitches on the workpiece.

As shown in FIG. 3, one embodiment of the sewn object holder 7 comprises a frame body 16 having a substantially rectangular shape in plan view and two transparent cloth pressing plates 17a and 17b. It is a cassette type, and one (lower surface side) cloth pressing plate 17b is fixed to the lower surface of the frame body 16 at its upper peripheral edge portion with a double-sided adhesive tape or the like, and the other (upper surface side) cloth pressing plate 17b.
a is a hinge 1 on its one side periphery (a part near the guide rail 8)
It is attached to the frame body 16 via 8 so as to be openable and closable.
Further, a pair of left and right locking blocks for attachment and detachment 19 mounted on one side of the frame body 16 are attached to the carriage 9
Disengage with the clamp device 20, 20 attached to the front of the
The cloth to be sewn is sandwiched between the two cloth pressing plates 17a and 17b and is replaced with a sewing operation.

Incidentally, in FIG. 3, the cloth pressing plate 17a is
Although it is drawn smaller than the rectangular cutout hole of the frame body 16, this is illustrated for the sake of convenience, and is actually slightly larger than the cutout hole. Then, the lifting frame 21 attached to the front surface of the carriage 9 and the actuator 22 such as an air cylinder move the holding frame 23 up and down. When the presser frame 23 rises, the front end side (the front end side of the table 4) moves so as to jump up greatly, and when the presser frame 23 is lowered, the work holder 7 is moved to the table 4 by this. This prevents any inconvenience such as the pressing and pushing of the frame body 16 and the like during the sewing work.

Next, a description will be given of the cutting device 25 for forming the pattern slot 24 in a plan view shape along the sewing pattern on the cloth pressing plates 17a and 17b which are the workpiece holders 7. The support plate 26 in the cutting device 25 can be detachably attached to the front surface of the sewing machine head 3 through the bolt 27, and the processing tool 29 can be moved up and down on the front surface of the support plate 26 via the guide means 28. Supported by.
That is, the processing tool 29 is the chuck 3 that holds the end mill 30.
1 and a drive motor 32 for driving the chuck 31 to rotate. Then, a connecting member 34 and a sliding plate 35 are attached via bolts 36 to the back surface of the fastening body 33 that detachably holds the body of the drive motor 32.
A pair of left and right guide plates 3 attached to the surface of the support plate 26
Vertical grooves 38, 38 formed in 7, 37 and the sliding plate 35
Between the vertical grooves 39, 39 formed on both the left and right sides of the guide, guide means 28, 28, which rotatably hold a plurality of balls 41 on the upper and lower longitudinal plates 40, are inserted (FIGS. 4 and 6). reference).

As another embodiment of the guide means 28, the left and right edges of the sliding plate 35 are provided at a pair of left and right guide plates 3.
It may be arranged to be slidable with respect to 7, 37. An elevating shaft 43 which projects downward from a lower end of an actuator 42 formed of an air cylinder or the like attached to the support plate 26 is provided with the connecting member 3 via a bifurcated bracket 44.
By connecting to the sewing machine 4, the processing tool 29 is vertically moved up and down with respect to the cloth pressing plates 17a and 17b which are the workpiece holders 7. On the other hand, the contact piece 45 attached to the bifurcated bracket 44 is faced so as to face the tip of a rod 47 of a hydraulic type fluid shock absorber 46 mounted upward on one side of the support plate 26, and processed. The movement of the tool 29 in the vicinity of the end stroke at the time of lowering operation is alleviated.

The end mill 30 in the processing tool 29
The first embodiment of the stopper means 48 for steplessly (or stepwise) adjusting the cutting depth for the cloth pressing plates 17a, 17b according to the present invention is as shown in FIGS. The end surface cam body 50 includes a substantially spherical beaded end surface cam body 50 rotatably fitted to a support shaft 49 protruding from the end, and a photographing handle 51 for manually adjusting the rotational phase of the end surface cam body 50. The end surface cam portion of the body 50 is arranged so as to face the contact portion 34a of the vertically moving member such as the connecting member 34.

The cylindrical cap-shaped photographing handle 5
The middle cylinder 51a in No. 1 is rotatably fitted to the support shaft 49,
In addition, the notch (not shown) at the end of the middle cylinder 52 is engaged with the engaging portion 52 projecting from the end face cam body 50, while the photographing handle 51 is pulled out from the support shaft 49 by the set screw 53. It is impossible and rotatable. In addition, the locking projection 55 of the latch 54 made of a spring plate provided on the surface of the support plate 26,
The photographing handle 51 is locked in a locking groove 56 formed in the end surface of the outer cylinder 51b at appropriate intervals in the circumferential direction,
The photographing handle 51, and thus the end face cam body 50, is configured so that the rotational phase thereof does not inadvertently shift, and the cutting depth can be adjusted and set stepwise. In this case, if the scales converted into the cutting depth are attached to the photographing handle 51 and the fixed portion such as the support plate 26, the cutting depth adjustment work becomes easier.

The axis line of the end mill 30 of the cutting device 25 and the axis line of the sewing needle 6 in the above embodiment do not shift in the X direction, but shift in the Y direction by a distance L as shown in FIG. To do. In this case, in order to cause the cloth presser plates 17a and 17b to cut the pattern slot having the same plan view shape as the sewing pattern based on the stitch formation command signal from the sewing pattern storage device built in the automatic sewing device, There is also a software system in which a correction signal corresponding to the distance L is added to the stitch formation command signal from the pattern storage device, but a jig can also be used as described below. That is, the pair of left and right jigs 60, 60 shown in FIG. 3 have a length corresponding to the distance L in the Y direction between the axis of the sewing needle 6 and the axis of the end mill 30, and the locking block 1 in the frame 16
If the jigs 60, 60 are attached to the jigs 9, 19 by screws or the like, and the locking block 61 provided on each jig 60 is engaged with the engaging portion 20a of the clamp device 20 mounted on the front surface of the carriage 9. good.

With the above-described structure, as described above, the two cloth pressing plates 17a and 17b are attached to the frame body 16 in advance via the adhesive and the hinge 18, and the frame body 16 is fixed to the jig 60.
It is attached to the clamp device 20 in the carriage 9 via. Next, the photographing handle 51 of the cutting device 25 mounted on the sewing machine head 3 is rotated clockwise or counterclockwise in FIG. 4 by an appropriate rotation angle to set the cutting depth, and the sewing pattern storage device is set. The carriage 9 is moved in the X direction and the Y direction in accordance with the stitch formation command signal from the end mill 30 so that the end mill 30 is located right above the starting end of the pattern groove hole 24.

Then, the actuator 42 is operated,
The machining tool 25 is moved down to press the lower end (blade edge) of the end mill 30 against the upper cloth pressing plate 17a, and the carriage 9 is moved in the XY directions to start cutting. In this case, the end mill 30 descends only to the depth at which the contact portion 34a such as the connecting member 34 abuts the end surface cam body 50 of the stopper means 48. And the presser plate 17
Depending on the material of a and 17b (aluminum, acrylic synthetic resin, etc.) and the plate thickness, the cutting depth per cutting process is made smaller than the plate thickness, and when the cutting depth is increased in multiple steps, The rotation operation of the end surface cam body 50 may be performed in plural times. When the cutting edge of the end mill 30 penetrates the upper and lower presser plates, the needle plate of the bed and the surface of the table 4 are not damaged.
A recess 62 having a diameter slightly larger than the diameter of the cutting edge portion of the end mill 30 may be formed in a corresponding portion of the table 4 or the like (see FIGS. 4 and 5).

As described above, the lower cloth pressing plate 17b is previously adhered and fixed to the lower surface of the frame body 16, and the upper cloth pressing plate 17b is fixed.
If a is attached to the frame body 16 via the hinge 18, as compared to mounting the pattern groove holes in the state where the two cloth holding plates are simply stacked, the pattern groove is attached to the frame body 16. It is extremely easy to set the upper and lower two presser plates so that the holes are aligned.

The cylindrical cover body 64 of the cutting debris suction device 63 shown in FIG. 7 surrounds the end mill 30 and the processing tool 25.
Is detachably attached to the tip end of the cylindrical cover body 64, and a cylindrical skirt body 65 is attached to the lower end side of the cylindrical cover body 64 so as to be vertically movable and to urge downward so as to always contact the surface of the cloth pressing plate 17a. , Suction cylinder 66 for cutting chips from end mill 30
It can be excluded with the air drawn from it.

FIG. 8 shows a second embodiment of the stopper means for adjusting the cutting depth by the cutting device 25. A support bracket 67 provided on the support plate 26 is screwed with an adjusting screw 68 so as to be vertically movable. The nut 69 serves to prevent the adjusting screw 68 from loosening. In this embodiment, the upper end of the adjusting screw 68 may be installed so as to face the contact portion 34a of the vertically moving member such as the connecting member 34. As another embodiment, although not shown, a stopper piece is provided so as to be vertically movable in a direction inclining vertically with respect to the support plate 26, the upper surface of the stopper piece faces the abutting portion, and the stopper piece is arranged in the horizontal direction. Alternatively, it may be configured to move and adjust via a screw rod that is vertically adjustable.

FIGS. 9 and 10 show two upper and lower cloth pressing plates 17a and 17b used for sewing a pocket portion.
Pattern press holes 70a, 70b, which are substantially U-shaped in a plan view, for forming seams at the edges of pockets in the sheet presser plates 17a, 17b.
On the other hand, a substantially rectangular pattern groove hole 71 is further cut and formed on the upper cloth pressing plate 17a to form one cloth 7
The core 73 inserted between the cloth 2a and the other cloth 72b is positioned in the pattern slot 71, so that the cloth 72
A and 72b are sandwiched between two cloth pressing plates 17a and 17b, and the pattern groove holes 70a and 70b are sewn.

As described above, when another pattern groove hole is to be formed by cutting in the upper cloth pressing plate among the stacked cloth pressing plates in a weighted manner, if the cutting depth is adjusted by the stopper means 48, It is easy to form another pattern groove hole only in the upper cloth pressing plate by sandwiching the cardboard between the lower cloth pressing plate that is not cut and the lower cloth pressing plate. The present invention can be applied to the case where three or more cloth pressing plates as the workpiece holders are cut, and the cutting device 25 of the present invention is mounted below the table 4 so that the cloth pressing plates are underside. Needless to say, the configuration may be such that cutting is performed from the side, and the positional deviation between the axis of the sewing needle and the axis of the cutting tool in plan view may be in both the X and Y directions.

[0024]

As described above, the cutting device for a sewn material holder of the present invention determines the relative position between the axis of the sewing needle and the sewn material holder according to the stitch formation command. In an automatic sewing device that changes and forms continuous stitches on a sewing object, a processing tool for cutting the sewing tool holder, and the processing tool in a direction perpendicular to the sewing tool holder. Since the guide means for guiding and the actuator for vertically moving the working tool in the vertical direction with respect to the workpiece holder are provided, the working tool can be arbitrarily moved up and down by the operation of the actuator. In addition to being able to do so, it can be held at a position largely apart from the stopper means.

On the other hand, since it is provided with a stopper means for variably restricting the cutting depth of the processing tool to the workpiece holder, the lowered position of the processing tool, and thus the cutting depth, can be arbitrarily set. It can be done and the fine adjustment can be done very easily.

[Brief description of drawings]

FIG. 1 is a perspective view of an automatic sewing device.

FIG. 2 is a side view of the automatic sewing device.

FIG. 3 is an exploded perspective view of a workpiece holder.

FIG. 4 is a front view of a cutting device.

FIG. 5 is a partially cutaway side view of the cutting device.

6 is a partially cutaway sectional view taken along the line VI-VI of FIG.

FIG. 7 is an enlarged side sectional view of a main part of the suction device.

FIG. 8 is a front view showing a second embodiment of the stopper means for adjusting the cutting depth.

FIG. 9 is a plan view of a pattern groove hole.

10 is a cross-sectional view taken along the line XX of FIG.

[Explanation of symbols]

 3 Sewing Machine Head 4 Table 6 Sewing Needle 7 Sewage Holder 9 Carriage 16 Frame 17a, 17b Cloth Holding Plate 24, 70a, 70b, 71 Pattern Groove 25 Cutting Machine 28 Guide Means 29 End Mill 32 Drive Motor 33 Fastening body 34 Connecting member 34a Contact part 42 Actuator 46 Fluid shock absorber 48 Stopper means 49 Spindle 50 End face cam body 51 Shooting handle 54 Latch

Claims (1)

[Claims] 1. An automatic sewing device for forming a continuous stitch on a sewing object by changing a relative position between an axis of a sewing needle and a workpiece holder according to a stitch forming command. A processing tool for cutting the holding tool, a guide means for guiding the processing tool in the vertical direction with respect to the workpiece holder, and a lifting drive of the processing tool in the vertical direction with respect to the workpiece holder. And a stopper means for variably restricting the cutting depth of the processing tool to the workpiece holder, the cutting apparatus for the workpiece holder in an automatic sewing machine. .