JPH06262419A - Working device for holding tool for stuff to be sewn in automatic sewing equipment - Google Patents

Abstract

PURPOSE:To facilitate the cleaning work for the chips to be generated in the cutting work 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 mounted on a sewing machine head through a pair of right and left guide plates. A connecting member 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 mounted on the supporting plate. A cylindrical cover body 64 is mounted on the lower end part of the driving motor 32 so as to surround the end mill 30, and a transparent cylindrical skirt body 65 made of soft synthetic resin is energized by a coil spring 68 so that it may be vertically movable, and is constantly brought into contact with the surface of a cloth pressing plate top 17a in a pushingly pressed manner. The chips together with the sucking air are sucked and removed through a sucking tube 66 provided in a communicating manner with the cylindrical cover body 64.

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 a device for promptly removing cutting chips 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.

[0004]

However, in the above-mentioned prior art, since no means for removing cutting scraps was provided, the cutting scraps produced by the end mill would immediately scatter to the surroundings. Since cutting waste adheres to the sewing object, it is necessary to clean the area before sewing the sewing object.

Further, if the cutting dust scattered during the cutting process enters into the mechanical portion such as the rotating portion of the automatic sewing machine, the accuracy of the automatic sewing machine is deteriorated and the life of the machine is deteriorated. There was an adverse effect such as a cause of. SUMMARY OF THE INVENTION It is an object of the present invention to solve these problems and to provide a cutting device for a workpiece holder that can automatically remove the cutting chips during cutting.

[0006]

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 and an actuator for vertically moving the working tool up and down with respect to the workpiece holder, and the tip of the working tool has a cylindrical shape that covers the outer periphery of the cutting tool. The cover body is fitted, and the cover body is
The tubular skirt body is mounted so as to be able to move up and down so as to come into contact with the surface of the workpiece holder, and the cover body is connected to a suction pipe for sucking the cutting waste inside with a fluid. Characterize.

[0007]

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 is composed of 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.

In FIG. 3, the cloth pressing plate 17a is drawn to be smaller than the rectangular cutout hole of the frame body 16, but 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 having 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 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. reference).

As another embodiment of the guide means 28, the left and right side edges of the sliding plate 35 are provided with 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
As an example of the stopper means 48 for steplessly (or stepwise) adjusting the cutting depth with respect to the cloth pressing plates 17a and 17b, as shown in FIG. 4 and FIG.
An end face cam body 50, which is rotatably fitted on a support shaft 49 protruding from the surface of the support plate 26, and an end face cam body 50.
And a photographing handle 51 for manually adjusting the rotation phase of the end face cam body 50. The end face cam portion of the end face cam body 50 is arranged so as to face the contact portion 34a of the vertical moving member such as the connecting member 34. There is.

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.

7 to 9 show a cutting dust suction device 63 for removing cutting dust by the end mill 30. As shown in FIG. 7, the cylindrical cover body 64 is attached to the end mill via a mounting bolt 67. It is removably attached to the tip of the processing tool 25 so as to surround 30, and is configured to immediately remove the cutting debris by the end mill 30 together with the air sucked from the suction pipe 66 connected to the side surface of the cylindrical cover body 64. ing.

A tubular skirt body 65 is vertically movable on the inner lower end side of the tubular cover body 64, and is biased downwardly via a coil spring 68 so as to press and contact the surface of the cloth pressing plate 17a. Has been done. At this time, the upper end of the tubular skirt body 65 is provided with the flange portion 6 for preventing the downward falling.
5a is formed (see FIG. 8). In addition, the side surface upper side of the tubular skirt body 65 so that the opening area of the suction pipe 66 connected to the side surface of the tubular cover body 64 is not blocked by the side surface of the tubular skirt body 65 in the raised position. A notch 69 is formed in the cutout (see FIG. 8). At the lower end of the tubular skirt body 65, at least one notch 70 is provided to allow air to be sucked in when it comes into pressure contact with the surface of the cloth pressing plate 17a. It is preferable that the tubular skirt body 65 be made of a transparent synthetic resin material so that it can be observed from above.

As shown in FIG. 9, a branch pipe 72 for blowing high-pressure air 71 to generate a negative pressure is attached to the other end of the flexible suction pipe 66. The other end of the discharge pipe 73, which is also flexible and is connected to the other end, is connected to a storage container 75 for storing the cutting waste 74. A filter 76 is preferably provided at the air discharge port so that the cutting dust 74 is not discharged outside together with the air blown into the storage container 75.

With the above structure, two cloth pressing plates 17a and 17b are attached to the frame 16 in advance by bonding and hinges 18, and the frame 16 is clamped in the carriage 9 via the jig 60. Attach to device 20. Then
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 operated. The carriage 9 is moved in the X and Y directions in accordance with the stitch formation command signal so that the end mill 30 is located right above the starting end of the pattern slot 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 in the cutting process per time is made smaller than the plate thickness, and when the cutting depth is increased in multiple times, 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 presser plate 17b is bonded and fixed to the lower surface of the frame 16 in advance, and the upper presser plate 17 is attached.
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.

Since the outer periphery of the end mill 30 is surrounded by a cylindrical cover body 64 that moves along with the working tool 25 and a cylindrical skirt body 65 that can move up and down while being urged downward at its lower end. The cutting dust generated by the cutting operation of the end mill 30 does not scatter to the outside of the cylindrical skirt body 65, and the cutting dust is removed by performing the air suction operation during the cutting operation. Since it is quickly drawn into the suction pipe 66 via the body 63, cutting debris does not collect in the tubular skirt body 65.

As shown as another embodiment in FIG. 10, a cylindrical skirt body 165 attached to the lower end of the cylindrical cover body 64 is formed of a flexible soft synthetic resin material, and the skirt body is formed. Even if the lower end of 165 can be moved up and down against the elastic force of itself or by the elastic force, the same function as in the above-described embodiment can be provided.

The present invention can be applied to the case where three or more cloth pressing plates, which are the workpiece holders, are cut, and the cutting device 25 of the present invention is mounted below the table 4 to hold the cloth pressing plate. It goes without saying that the plate may be cut from the lower surface side, and the positional deviation in the plan view between the axis of the sewing needle and the axis of the cutting tool may be in both the X and Y directions.

[0025]

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. it can.

Then, a cylindrical cover body covering the outer periphery of the cutting tool is fitted on the tip of the processing tool, and a cylindrical skirt body is brought into contact with the surface of the workpiece holder on the cover body. Since it is mounted so that it can be moved up and down, when the processing tool is moved so as to approach the surface of the workpiece holder, the tubular skirt body is irrespective of the thickness of the workpiece holder or the cutting depth. The end portion of the tool can always follow the surface of the object to be sewn, and the cutting scraps generated during the cutting operation will not be scattered outside the tubular skirt body.

Moreover, since the suction pipe for sucking the cutting chips inside by the fluid is connected to the cover body,
It is possible to immediately draw the cutting chips to another place through the cylindrical cover body and the suction pipe without accumulating the cutting chips in the inner diameter portion of the cylindrical skirt body. Therefore, according to the present invention,
This has the effect of making the cleaning process of the cutting waste extremely simple, and eliminating the adverse effects such as the deterioration of the accuracy of the automatic sewing device and the deterioration of the life of the device.

[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 cutting waste suction device.

FIG. 8 is a perspective view of a main part of a cutting waste suction device.

FIG. 9 is an overall schematic view of a cutting waste suction device.

FIG. 10 is a side sectional view of another embodiment of the tubular skirt body.

[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 Pattern Groove Hole 25 Cutting Processing Device 28 Guide Means 29 Processing Tool 30 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 Photographing handle 54 Latch 62 Recess 63 Cutting debris suction device 64 Cylindrical cover body 65 Cylindrical skirt body 66 Suction tube 68 Coil spring 69 Notch 71 High Pressure Air 75 Storage Container

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D05B 39/00 7152-3B

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. A cylindrical cover body that covers the outer periphery of the cutting tool is fitted to the tip of the processing tool, and a cylindrical skirt body is attached to the surface of the workpiece holder. And a suction pipe for sucking cutting dust inside the cover body with a fluid is connected to the cover body so as to come into contact with the sewing machine. Processing equipment.