JPH0760686A - Cutting device and cutting method - Google Patents

Abstract

PURPOSE:To improve production efficiency by eliminating a useless action of a cutting edge pulled up from sheet materials every time a cutting action is stopped. CONSTITUTION:In a noncutting position where a pneumatic cylinder 11 elongates and the tip 6a of a cutting edge 6 retreats at an interval L1 to a surface 7 of sheet materials, the movement in the X axis and Y axis direction of a cutting head 1 or angular displacement in the R axis direction is carried out. A cutting position where the pneumatic cylinder 11 retreats contractedly and the cutting edge 6 is inserted in the sheet materials 3, is regulated when a stopper 22 comes into contact with a frame 12. A foot presser 14 is installed on the lower ends of guiding shafts 14a and 14b, and the upper ends are energized upward by springs 64a and 64b. A layered thickness of the sheet materials 3 is detected by a displacement quantity detected by a rotary encoder 35 when setting a position of the foot presser 14 being a cloth presser at cutting time, and a moving means 13 can be also set.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to apparatus and methods for cutting flexible sheet materials such as fabrics, knits, papers, plastics and leather.

[0002]

2. Description of the Related Art A typical first prior art is disclosed, for example, in Japanese Examined Patent Publication No. 56-8759 (Japanese Unexamined Patent Publication No. 52-87780). In this prior art, the cutting blade is reciprocally moved between a raised position where it does not engage with the sheet material and a lowered position where it engages with the sheet material by the rotation output of the solenoid, and a sheet pressing member corresponding to the pressing member in the present invention. Presses the upper surface of the sheet material by its own weight,
A configuration is disclosed in which a lifting solenoid is provided to prevent the sheet material from being lifted by the raising operation of the cutting blade and to set the upper limit position of the sheet presser.

The second prior art is, for example, Japanese Patent Publication No.
-33595 (Japanese Patent Laid-Open No. 62-297092). In this prior art, the base frame is reciprocated between a raised non-cutting position and a lowered cutting position by a pneumatic actuator, and the base frame has two
A pressing plate corresponding to a pressing member according to the present invention is carried on the lower end of the vertical rod of the book, and the pressing plate is urged downward by a spiral compression spring with respect to the base frame, and when the base frame is in the raised position, A structure is disclosed in which the pressing plate is arranged above the surface of the sheet material.

[0004]

In these first and second prior arts, the ascending position of the cutting blade is determined by the maximum permissible laminated thickness of the sheet material, and the cutting blade is in the ascended state. The position is set so that the cutting edge of the cutting blade is reliably separated from the sheet material. In particular,
In the first and second prior arts described above, since the cutting blade can take only two positions of the raised position and the lowered position, it cuts a very small number of thin sheet materials as compared with the maximum allowable laminated thickness of the sheet materials. Even if it is, the stroke is the same as when cutting a sheet material equal to the maximum allowable laminated thickness, therefore, the thinner the sheet material within the range of the maximum allowable laminated thickness, the more undesired operation of the cutting blade. There is a problem in that the production efficiency increases and the production efficiency decreases.

Therefore, an object of the present invention is to control the non-cutting position of the cutting blade in accordance with the thickness of the sheet material to be cut so as to eliminate wasteful operation of the cutting blade and improve productivity. It is to provide a cutting device and a cutting method that enable the cutting.

[0006]

According to the present invention, there is provided a table having a supporting surface extending in one plane, on which sheet materials are stacked and placed, and driven and driven in the one plane. In a cutting machine having a cutting head provided with a cutting blade that is reciprocally oscillated in the Z-axis direction perpendicular to the sheet material, a cutting thickness is set in advance with a stacking thickness setting means for setting the stacking thickness of the sheet material. It is moved up and down in the Z-axis direction between a position and a non-cutting position determined so that the tip of the cutting blade has a predetermined distance from the surface of the sheet material according to the stacking thickness set by the stacking thickness setting means. A cutting device including a moving unit.

Further, the layer thickness setting means and the moving means of the present invention are provided in the cutting head.

Further, in the laminated thickness setting means of the present invention, a pressing member for pressing the surface of the sheet material at the peripheral edge of the cutting blade is provided so as to be displaceable in the Z-axis direction according to the laminated thickness of the sheet material. The laminated thickness of the sheet material is set depending on the position where the member contacts the surface of the sheet material.

Further, the cutting head of the present invention is provided with a polishing means capable of polishing the cutting blade at the non-cutting position and a blade width measuring means capable of measuring the width of the cutting blade at the non-cutting position. It is characterized by

Further, according to the present invention, a plurality of sheet materials are stacked and placed on a support surface extending in one plane, and a cutting blade capable of moving up and down in the Z-axis direction perpendicular to the one plane is formed on the sheet material. In the cutting method in which the cutting blade is reciprocally oscillated at the inserted cutting position, and the cutting blade is withdrawn from the sheet material at the non-cutting position, the tip of the cutting blade is preliminarily separated from the surface of the sheet material depending on the laminated thickness of the sheet material. In the cutting method, the non-cutting position is set so as to have a predetermined interval.

[0011]

According to the present invention, the table is formed with a support surface extending in one plane, and a plurality of sheet materials are stacked and placed on the support surface. The cutting head includes a cutting blade, and the cutting blade is reciprocally vibrated to cut the sheet material into a predetermined cutting shape. The cutting blade is moved up and down in the Z-axis direction by the moving means. When the cutting blade is retracted to the non-cutting position, the cutting means moves the cutting edge in the Z-axis direction so as to have a predetermined distance from the surface of the sheet material. Such movement of the cutting blade in the Z-axis direction is achieved based on the stack thickness of the sheet material set by the stack thickness setting means.

Since the non-cutting position of the cutting blade is set according to the laminated thickness of the sheet material, regardless of the laminated thickness of the sheet material, the cutting edge of the cutting blade facing the sheet material has an unnecessarily large distance from the surface of the sheet material. Therefore, it is possible to improve the production efficiency by eliminating unnecessary movement time of the cutting blade, shortening the time required for cutting a predetermined cutting pattern, and separating without separating. Such shortening of the cutting time causes a large difference in the production amount by accumulating in a large number of cutting times over a long period of time, and the productivity can be remarkably improved.

According to the invention, the cutting thickness head and the moving means are provided in the cutting head. by this,
Even if the cutting head is driven over a wide area on the table,
The cutting time can be shortened at each traveling position.

Further, according to the present invention, the laminated thickness setting means is provided with a pressing member, and the pressing member is displaced in the Z-axis direction to set the thickness from the position where it comes into contact with the surface of the sheet material. Since the operating position of the pressing member during cutting may be set with the surface of the sheet material as a reference, it can be efficiently set by a series of operations.

Further, according to the present invention, the cutting head is provided with the polishing means and the blade width measuring means, and it is possible to polish the cutting blade and measure the blade width at the non-cutting position. Accordingly, the cutting blade can be ground or the width of the cutting blade can be measured while the cutting head is being pulled out of the sheet material and retracted because the cutting head moves between the patterns to be cut.

Further, according to the present invention, when cutting into a predetermined cutting shape while reciprocally vibrating at the cutting position where the cutting blade is inserted into the sheet material, the non-cutting position of the cutting blade is the sheet edge of the cutting blade. It is set to have a predetermined distance from the surface of the material.

In this way, it is possible to prevent the gap between the surface of the sheet material and the cutting edge of the cutting blade at the non-cutting position from being unnecessarily large, and to insert the cutting blade with the minimum moving amount according to the laminated thickness. Further, the production efficiency can be improved by eliminating the unnecessary operation and the operation time required for the operation.

[0018]

1 is a simplified perspective view showing the basic structure of a cutting head 1 provided in a cutting device according to an embodiment of the present invention. A plurality of sheet materials 3 which are cloths such as clothes are stacked and placed on a flat support surface 5 constituted by a large number of bristle brushes 4. A cutting head 1 of a cutting device for cutting these sheet materials 3 into a predetermined shape.
Is basically a cutting blade 6 and a cutting blade vibrating motor 48 (see FIG. 4) for cutting blade 6 in the Z-axis direction perpendicular to the support surface 5.
Head block 9 that reciprocally vibrates by a pneumatic cylinder 1 that vertically displaces the head block 9 in the Z-axis direction.
1 and the pneumatic cylinder 1 so that the cutting edge of the cutting blade 6 has a predetermined distance L1 from the surface 7 of the sheet material 3.
Moving means 13 for moving 1 in the Z-axis direction, a foot presser 14 as a pressing member for pressing the sheet material 3 placed on the support surface 5 at the peripheral edge of the cutting blade 6, and the Z-axis of the foot presser 14. Position detecting means 16 for detecting the position in the direction, and in response to the output from the position detecting means 16,
And a control means 17 for controlling the moving means 13.

A crank mechanism (not shown) is built in the head block 9, and the cutting blade 6 is reciprocally oscillated along the Z axis by the crank mechanism. R-axis means 15 for angularly displacing the cutting blade 6 about the Z-axis is also provided, and is configured to perform the cutting operation while directing the cutting edge in a preprogrammed cutting direction. The head block 9 is vertically displaced together with the cutting blade 6 by the pneumatic cylinder 11 along a pair of parallel guide shafts 49a and 49b. At a cutting start position or a position where the cutting direction is changed at a large angle, the piston rod 18 of the pneumatic cylinder 11 retracts and the cutting blade 6 pierces the sheet material 3. At the cutting end position, the piston rod 18 extends and the cutting blade 6 is pulled out from the sheet material 3. Thus, at the non-cutting position where the cutting blade 6 is removed from the sheet material 3, the tip 6a of the cutting blade 6 is cut.
Are set so as to have the predetermined interval L1. The pneumatic cylinder 11 is fixed to the sliding plate 10.
The lower limit when the head block 9 descends is defined by a stopper described later, and the cutting position of the cutting blade 6 is fixed.

The moving means 13 has a screw rod 19 screwed into a nut member 10a fixed to the sliding plate 10, a pulley 20 fixed to the upper end of the screw rod 19, and a bidirectional A1 screw rod 19. , A2 for rotational driving, a pulley 24 fixed to the output shaft 23 of the Z-axis lift motor 21, and a timing belt 25 wound around and stretched between the pulleys 20, 24. And a pair of limit switches 26a and 26b for detecting the upper limit position and the lower limit position of the nut member 10a.

The Z-axis lift motor 21 includes a frame 1
2, a stepping motor is used, for example. The lead of the screw rod 19 is 3 mm / rev.
Selected to the degree. In addition, each limit switch 26a, 2
6b are arranged with a gap L2 = 50 mm between the top and bottom,
When the pulse rate of the Z-axis lift motor 21 is 1000 pulses / sec, the sliding plate 10 can be driven to move up and down at 40 mm / sec. Each limit switch 2
When one of the switching modes of 6a and 26b changes, the control means 17 outputs a stop signal to stop the Z-axis lift motor 21. The sliding plate 10 is slidable in the Z-axis direction along a guide groove (not shown) formed in the frame 12 of the cutting head 1.

The foot presser 14 includes guide shafts 14a, 1
It is fixed to the lower end of 4b. Springs are provided at the upper ends of the guide shafts 14a and 14b to urge the foot presser 14 in the direction away from the surface 7 of the sheet material 3 on the Z axis. A pneumatic cylinder 27 fixed to the sliding plate 10, a mounting piece 29 fixed to the tip of a piston rod 28 of the pneumatic cylinder 27, and a roller 2 pivotally supported on the lower end of the mounting piece 29.
9a presses the foot presser 14 toward the front surface 7 side on the Z axis. The stroke L3 of the piston rod 28 of the pneumatic cylinder 27 is selected to be 20 to 30 mm, for example.

In order to detect the stack thickness of the sheet material 3,
A foot presser 14 can be used. From the state where the pneumatic cylinder 27 is extended, the Z-axis lift motor 21
The sliding plate 10 is lowered by. When the foot presser 14 comes into contact with the surface 7 of the sheet material 3 while descending, the Z
The shaft lift motor 21 is stopped. The contact state of the foot presser 14 is detected by the position detecting means 16.

The position detecting means 16 has a rack 33 that rises upward from a mounting piece 29 on which a roller 29a that abuts the foot presser 14 is axially supported, a pinion 34 that meshes with the rack 33, and a rotation amount of the pinion 34. And a rotary encoder 35 for detecting. The rotary encoder 35 is fixed to the R-axis main body 15a. When the change in the count value of the rotary encoder 35 reaches an arbitrary set value L4, the Z-axis lift motor 21 is stopped. The head block 9 has an output shaft 50 that reciprocally vibrates along the Z axis.
The cutting blade 6 is angularly displaced and detachably attached to the cutting blade 6. The cutting blade 6 is inserted through the R-axis main body 15a and the operating ring 51, which are substantially right cylindrical. The operating ring 51 is
The rotational force is transmitted from the motor 52, which is provided on the inner peripheral side of the R-axis main body 15a, to the upper gear 51a via the timing belt 52a.
The blade tip of the cutting blade 6 is rotated in two directions and is oriented in the cutting direction according to the cutting program. The R-axis body 15a is fixed to the sliding plate 10. The other ends of the guide shafts 14a and 14b are held in the operating ring 51.

In the operating ring 51, pairs of polishing rollers 53a, 54a;
54b is provided and is in a non-contact state at the time of cutting. The polishing rollers 53a, 54 are provided by an internal gear 55 which is coaxially and rotatably provided on the operating ring 51.
a; 53b and 54b are rotationally driven. At the time of polishing, the cam ring 5 provided coaxially below the internal gear 55.
Bind 7 from outside. Depending on the rotating direction of the operating ring 51, either one of the pair of polishing rollers 53a, 54a or the other pair of polishing rollers 53b, 54b is oscillated so as to alternately contact the cutting blade 6. The internal gear 55 is
It is rotationally driven by the power from the motor 58 via the timing belt 59.

The pneumatic cylinder 11 is extended to cut the cutting blade 6
Is pulled up to the non-cutting position set by the moving means 13, the polishing rollers 53a, 54a;
After b and 54b grind the cutting edge, the operating pin 61 of the blade width detecting means 60 is moved forward to press the detecting pin 62 and then retracted, for example, the cutting blade 6 from the movement amount and the change of the pressing force. It is also possible to measure the amount of wear of the blade edge. That is, when the detection pin 62 advances and contacts the cutting edge, the pressing force is detected. The position of the blade edge indicates when the detection pin 62 is retracted and the pressing force disappears. When the cutting blade 6 wears, the position of the cutting edge changes to the forward side of the detection pin 62.

With reference to FIG. 2, in the case of a sheet material having a high air permeability when sucked, such as a woven fabric, a knitted fabric, a paper, a plastic and a leather, the set value L4 is a flat surface without limit. Since it is close, the foot presser 14 can be brought closer to the foot presser 1 from its stroke L3.
4 is a value obtained by subtracting the displacement amount L5 of 4 (L4 = L3−L5). At this time, the set value L4 is determined by the rotary encoder 3
It is calculated and calculated from the count value of 5. Further, in the case of a sheet material having low air permeability even when sucked, such as ski wear cloth, the set value L4 must be increased and exceeds the stroke L3 of the foot presser 14, so that the Z-axis lift motor The set value L4 is calculated based on the number of steps of 21. The set value L4 thus obtained is a value that is appropriately increased / decreased according to the cutting conditions such as the material of the sheet material 3, the laminated thickness, and the cutting speed, and the operator inputs the input means shown in FIG. Input from 36 etc. and set. The set value L4 input in this way is maintained until the end of cutting of the sheet material 3 for one mark, but the operator can change the set value on the way.

When the cutting of one mark is completed, the pneumatic cylinder 11 extends and the cutting blade 6 separates from the sheet material 3 to the upper non-cutting position, and the pneumatic cylinder 27 contracts so that the foot presser 14 causes the sheet material 3 to move. Return to the upper limit position away from. Further, when either one of the limit switches 26a and 26b is turned on by the operation corresponding to the set value L4 described above, an error occurs, and the Z-axis lift motor 21 and other cutting operations are stopped. Further, when the cutting blade 6 is in a standby state for changing the direction during cutting, the cutting blade 6 is retracted to the non-cutting position, and the foot presser 14 is kept in contact with the sheet material 3.

FIG. 3 shows a cutting device 3 having a cutting head 1.
It is a perspective view which shows the whole structure of 7. The cutting device 37 provided with the above-described cutting head 1 is used as a table for the base 3
Three suction boxes 39a, 3 placed horizontally on the 8
9b, 39c and each suction box 39a, 39b, 39
The bristle brush 4 that forms the support surface 5 on c, and the support surface 5 that is provided at the bottom of each suction box 39a, 39b, 39c, and through each suction box 39a, 39b, 39c.
A suction duct 40 for sucking the upper sheet material 3,
The suction source 41 that introduces a suction force into the suction duct 40. Further, the cutting device 37 has a Y-axis beam 43 extending in the Y-axis direction and a traveling body 44 that is driven to travel along the X-axis direction orthogonal to the Y-axis direction. The support surface 5 is formed on one plane including these X axis and Y axis. In addition, as another embodiment of the present invention, the traveling body 44
However, the Y-axis beam 43 may be moved up and down in the Z-axis direction. The cutting head 1 is supported by the Y-axis beam 43 so as to be movable in the Y-axis direction, and the sheet material 3 placed on the support surface 5 is cut according to preset cutting data.
It is constructed so that it can be cut into a desired shape.

FIG. 4 is an enlarged sectional view of the cutting head 1 seen from the Y-axis direction, FIG. 5 is a sectional view seen from above in FIG. 4, and FIG. 6 is a sectional view seen from the left side of FIG. is there. The Y-axis beam 43 has two rails 45 parallel to its axis.
a and 45b are fixed, and these rails 45a and 45b are
The movement of the cutting head 1 in the Y-axis direction is guided along. Sliding members 47a and 47b fixed to the support portion 12a of the frame 12 are engaged with the rails 45a and 45b, respectively. A recess 12b is formed on the upper surface of the support 12a. The recess 12b is provided when the head block 9 descends.
Receive the stopper 22. The stopper 22 has a tip formed of hard rubber and is fixed to the head block 9. Therefore, when the pneumatic cylinder 11 retracts and the sheet material 3 is cut by the cutting blade 6, the cutting position is the sliding plate 1.
Even if the non-cutting position changes due to the ascending / descending movement of 0, it becomes constant with respect to the support surface 5.

An origin cam 56 is provided on the operating ring 51.
Is installed. The origin cam 56 is used to detect the direction of the cutting edge of the cutting blade 6, that is, the reference direction of the R axis.
The blade width of the cutting blade 6 can be measured in a fixed orientation as shown in FIG. The blade width detecting means 60 is the R-axis main body 1
It is attached to 5a. In this direction, the operation pin 61 and the detection pin 62 are on the same axis. The detection pin 62 is inserted through the inside of the operating ring 51 in the Y-axis direction, and the inner tip thereof faces the cutting edge of the cutting blade 6. The distance between the position where the tip of the detection pin 62 contacts the cutting edge and the position of the R axis is the blade width to be compensated for when cutting. This blade width changes due to abrasion or replacement of the cutting blade 6 due to polishing. The position of the cutting edge that actually cuts the sheet material 3 deviates from the R axis by the width of the cutting edge. Therefore, in order to obtain an accurate cutting pattern, the amount of movement of the cutting head 1 in the X axis direction and the Y axis direction is set. Need to compensate.

FIG. 7 is a flow chart for explaining the control operation by the control means 17 when starting the cutting of one mark. First, in step m1, the sheet material 3 to be cut is placed on the supporting surface 5, the cutting head 1 is returned to the origin such as the corner of the table, and the control operation is started. The moving means 13 is in a raised state. Step m2
Then, the cutting head 1 moves to the cutting start position, the pneumatic cylinder 27 is pressure-biased, the piston rod 28 extends, and the foot presser 14 descends. Step m
At 3, the Z-axis lift motor 21 is driven in the descending direction. By driving the Z-axis lift motor 21 as described above, the foot presser 14 gradually descends, comes into contact with the surface 7 of the sheet material 3, and further presses the surface 7. When the foot presser 14 is pressed, it is displaced upward against the pressing force of the springs at the upper ends of the guide shafts 14a and 14b. This displacement is
It is detected by the position detecting means 16. When the rotary encoder 35 detects the displacement in step m4, it is determined in step m5 whether or not the displacement amount L5 is the same as the reference value. If the displacement amount is the same, the process proceeds to step m6, and the descending operation of the Z-axis lift motor 21 is performed. Stop, step m7
Then, the control operation ends, and the cutting operation for one mark on the sheet material 3 is continued in accordance with a predetermined program.

By setting the position of the moving means 13 in this way, the foot presser 14 and the cutting blade 6
It is possible to set the ascending position of 1 to such an extent that the swell existing on the surface 7 of the sheet material 3 can be cleared. As a result, it is possible to minimize unnecessary movement of the cutting blade 6 and the foot presser 14 when moving up and down, and improve productivity.

As another embodiment of the present invention, when the sheet material 3 is a material having a low air permeability and a bulge on the surface, such as a ski wear material,
The control operation before cutting is performed according to the flowchart shown in FIG. That is, the control operation is started in step n1, the foot presser 14 is lowered in step n2, and the Z-axis lift motor 21 is driven in step n3. Steps n1 to n4 are steps m1 to m4 in FIG.
Is the same as. In step n4, the rotary encoder 3
When 5 detects the displacement amount L5, in step n5, the drive is started in the direction in which the Z-axis lift motor 21 moves upward, that is, in the direction in which it rotates in the reverse direction. Foot presser 1 at step n6
4 is equal to the set value L4, and if it is the same, in step n7, the Z-axis lift motor 21
The ascending operation is stopped, and the control operation ends in step n8.

In this way, the position setting operation of the foot presser 14 is utilized to ensure that the contact between the cutting blade 6 and the foot presser 14 and the sheet material 3 is cut off. The rising position can be set.

FIG. 9 shows a simplified configuration of the moving means 13 and the foot presser 14 from the embodiment shown in FIG. The moving means 13 sets the position of the R-axis main body 15a in the Z-axis direction with respect to the support surface 5 of the table. At the non-cutting position where the pneumatic cylinder 11 extends and the tip 6a of the cutting blade 6 retreats from the surface 7 of the sheet material 3 with a gap L1 therebetween, the cutting head 1 moves in the X-axis and Y-axis directions and R Performs angular displacement in the axial direction. The cutting position where the pneumatic cylinder 11 retracts and the cutting blade 6 is inserted into the sheet material 3 is defined by the stopper 22 contacting the frame 12. The foot presser 14 includes a guide shaft 14a,
14b is attached to the lower end of the spring 14a, and the upper end of the spring 14a
It is urged upward by 4b. The laminated thickness of the sheet material 3 can be detected by the displacement amount detected by the rotary encoder 35 when setting the position of the foot presser 14 which is the material presser during cutting, and the moving means 13 can be set at the same time.

10 to 12 show a construction related to polishing of the cutting blade 6. 10 is a partial cross-sectional view, and FIGS. 11 and 12 are cross-sectional views taken along the section line XI-XI in FIG. 10. FIG. 12 shows a polished state with a part omitted.

The driving force from the motor 58 is the pulley 58a.
And is transmitted to the outer peripheral side of the internal gear 55 through the timing belt 59. The rotation of the planetary gear 65 meshing with the inner peripheral side of the internal gear 55 is controlled by the polishing rollers 53a, 53b;
It is the rotation transmission means 67 that transmits to 4a and 54b.
It is the locking means 69 that locks the rotation of the operating ring 51 and releases the locked state.

The operating ring 51 is rotatably supported by the R shaft main body 15a fixed to the sliding plate 10 via a pair of upper and lower bearings 71 and 72. An origin cam 56 is attached above the operation ring 51. An origin detector 73 is provided near the peripheral edge of the origin cam 56. Origin cam 5
When the protruding portion 6 is located at the position of the origin detector 73, the orientation of the cutting edge of the cutting blade 6 is used as a reference.

In the rotation transmission means 67, the planetary gear 65 is fixed to the shaft 75a. In the vicinity of the shaft 75a, the shaft 75
Another axis 75b is arranged parallel to a and each axis 75
Gears 76a and 76b meshing with each other are fixed to a and 75b, respectively, and the rotational force of the planetary gear 65 is transmitted to the other gear 76b via one gear 76a, and the gear 76b is fixed to the shaft. It is transmitted to 75b. A pair of pulleys 77a and 78a is fixed to the one shaft 75a with a space in the axial direction. The same applies to the other shaft 75b. A swinging member 79 is provided between these pulley pairs.
One ends of a and 79b are swingably attached. Shafts 80a and 80b are inserted into the other ends of the swinging members 79a and 79b, and the polishing rollers 53a and 54a; 53b and 54b are rotatably attached to both ends of the shafts 80a and 80b. .

An attachment piece 81 is fixed to the R-axis main body 15a, and the attachment piece 81 is provided with the locking means 69.
The locking means 69 has a pneumatic cylinder 82 fixed to the mounting piece 81, and a contact piece 83 fixed to the tip of the piston rod of the pneumatic cylinder 82.
Can contact / separate from the outer peripheral surface of the toothed portion 57a of the cam ring 57 to lock the rotation of the cam ring 57 and release the locked state.

As shown in FIG. 12, the cam ring 57 has a cam groove 84 which is convex outward in the radial direction from the inner peripheral surface of the cam ring 57.
a and 84b and two through holes 86a and 86b extending in the circumferential direction are formed on both sides of the contact portion 85. The cam groove 84
The followers 87a and 87b integrally formed with the swing members 79a and 79b are fitted in the a and 84b, and are guided along the cam surface. Both ends of the tension coil spring 88 are respectively locked to the swing members 79a and 79b,
The polishing rollers 53a, 54a; 53b, 54b are urged in directions toward each other. This allows each follower 87
a and 87b are outward in the radial direction, that is, each of the followers 87a,
When 87b faces each cam groove 84a, 84b, it is spring-biased in a direction to elastically contact each cam surface.

The cutting blade 6 is fitted and guided in a guide groove of a guide member 89 provided upright in the operating ring 51, and a mounting piece 90 is fixed to the guide member 89. Two swinging arms 91 a and 91 b are attached to the mounting piece 90 by a pin 92.
a and 92b are swingably connected, and the free ends 93a and 93b of the swing arms 91a and 91b have the through holes 86.
It fits in a and 86b. Each swing arm 91a, 91
b is each of the free end portions 93a, 9a due to the tension coil spring 94.
The springs 3b are biased toward each other. When the contact piece 83 is separated from the toothed portion 57a of the cam ring 57, the cam ring 57 and the operating ring 51 rotate integrally, and the followers 87a and 87b are provided with the cam grooves 84a and 84b.
Stay in the center of.

In this state, when compressed air is supplied to the pneumatic cylinder 82, the piston rod extends and the contact piece 8
3 abuts on the outer peripheral surface of the toothed portion 57a, which prevents the cam ring 57 from rotating. Motor 5 for R-axis drive
When 2 is rotationally driven, the actuation ring 51 slightly rotates in one direction C, one follower 87a is fitted into the cam groove 84a, and the free end portion 93b of the one swing arm 91b is also fitted.
Is abutted against the abutting portion 85, it is angularly displaced in a direction away from the other swing arm 91a against the spring force of the tension coil spring 94 and is expanded. In this state, the revolution movement of the planetary gear 65 is restricted, and the rotation of the internal gear 55 causes the planetary gear 65, the shafts 75a and 75b, and the gears 76 to rotate.
a and 76b are transmitted to the polishing rollers 53a and 54a; 53b and 54b via the pulleys and belts 95 and 95b, and are rotationally driven. These polishing rollers 53a,
The rotation speeds of 54a; 53b and 54b are 4500 to 800.
The cutting blade 6 is selected on the side of the polishing roller 54a and is selected to be about 0 rpm.
Polish the cutting edge of.

When the R-axis driving motor 52 starts to rotate in the opposite direction, the rotation is transmitted to the polishing rollers 53a, 54a; 53b, 54b as described above, and the operating ring 51 is moved. , The other follower 87b is rotated in the direction opposite to the rotation direction C, and the other follower 87b is formed in the cam groove 84b.
The other side surface of the cutting blade 6 is polished by the polishing roller 54b side. When polishing the cutting blade 6 as described above, the polishing rollers 53a, 54a;
The contact pressure of the cutting blades 3b and 54b against the cutting blade 6 can be adjusted by the spring force of the tension coil spring 88. Further, the polishing amount can be set by the depth d from the inner peripheral surface 96 of each cam groove 84a, 84b. In this way, the polishing rollers 53a, 54a; 53b, 54b are brought into contact with the cutting blade 6 in a state where the rotation of the cam ring 57 is stopped by the locking means 69 regardless of the rotational position of the cutting blade 6. Can be polished.

FIG. 13 shows a specific construction for measuring the blade width. The blade width detection means 60 is provided on the operation ring 51, and includes a first block 101 including the detection pin 62,
The second block 10 provided on the R-axis main body 15a side radially outward with respect to the R-axis 8 with respect to the first block 101.
It consists of 2. The first block 101 is formed with a spring accommodating hole 103 having a right cylindrical inner peripheral surface, a holding member 104 fixed to the actuation ring 51, and the detection pin 6.
The first compression coil spring 105 accommodated in the spring accommodating hole 103 in a state of being attached to the second compression coil spring 105. The detection pin 62 has a small diameter portion 106 having a right cylindrical shape and a large diameter portion 107 having a right cylindrical shape integrally formed at one end of the small diameter portion 106, and faces the cutting blade 6 of the small diameter portion 106. A locking ring 108 is attached near the end of the first compression coil spring 10.
The spring force of 5 prevents the detection pin 62 from coming off the spring housing hole 103.

In the state where the detection pin 62 is retained by the locking ring 108, the end portion 106a of the small diameter portion 106 of the detection pin 62 facing the cutting blade 6 and the small diameter portion 106 of the large diameter portion 107. The end portion 107 a on the opposite side of the holding member 104 projects from the holding member 104 to both sides. The first block 101 has the R-axis 8 of the operating ring 51.
It rotates by rotating around.

The second block 102 includes a casing 110 fixed to the R-axis main body 15a and a casing 1
The pressing member 111 housed in the casing 10 and the casing 11
It has a linear stepping motor 63 which is fixed to 0 and drives the pressing member 111 toward and away from the R-axis 8 to move toward and away from it, and a proximity switch 112 which detects the displacement of the pressing member 111. The pressing member 111 includes a cylinder 113,
A piston 11 that is displaceably housed in a cylinder 113
4 and. The cylinder 113 includes a small-diameter cylindrical portion 115,
The large-diameter cylindrical portion 116 is integrally connected to one end of the small-diameter cylindrical portion 115 in the axial direction. A piston chamber 117 into which the piston 114 is fitted is formed in the large-diameter cylindrical portion 116,
Further, the small diameter cylindrical portion 115 is formed with a spring accommodating hole 119 into which the piston rod 118 coaxially extending from the piston 114 is inserted. A second compression coil spring 120 is mounted on the piston rod 118 in the spring housing hole 119.
20 elastically biases the piston 114 radially outward with respect to the R-axis 8, that is, to the left in FIG. The spring constant of the second compression coil spring 120 is set larger than that of the first compression coil spring.

The casing 110 includes a cylinder 11
An insertion hole 121 through which the small-diameter cylindrical portion 115 of No. 3 is inserted is formed, and the output shaft 122 of the linear stepping motor 63 is formed.
Can protrude to the outside of the casing 110 when it extends to the right in FIG. The output shaft 122 is shown in FIG.
In the state of retracting to the left of, the operating pin 61 and the detection pin 62, which are the tip end portions of the shaft portion 123 of the small diameter cylindrical portion 115.
The end portion 107a of the large-diameter portion 107 is spaced apart from the end portion 107a by a distance D1. Further, the small-diameter portion 106 of the detection pin 62, the end portion 106a, and the cutting edge 66 of the cutting blade 6 are separated from each other with a distance D2. Further, the end surface 124 of the large-diameter cylindrical portion 116 of the cylinder 113 and the end surface 125 of the piston 114 facing the end surface 124 are spaced apart by a distance D3, and further the end surface 126 of the small-diameter cylindrical portion 115 and the end surface 126 thereof are opposed to each other. The end surface 127 of the piston rod 118 is separated by a distance D4. The distance D1 is selected to be, for example, 1.5 mm, the distance D2 is selected to be 7.5 mm, the distance D3 is selected to 1.0 mm, and the distance D4 is selected to 1.0 mm.

The large-diameter cylindrical portion 116 of the cylinder 113 has guide elongated holes 128a, 128b extending in the axial direction thereof.
And guide pins 129a and 129 fixed to the piston 114 are formed in the respective guide slots 128a and 128b.
b is movably inserted.

The linear stepping motor 63 has a step size of 0.029 mm / pulse and a lead pitch of 0.7 mm / rotation. For example, 420 pulses / sec at a moving speed of 12 mm / sec causes the output shaft 12 to move.
2 can be driven to extend / retract.

In the large-diameter cylindrical portion 116 of the cylinder 113, the tip portion 106a of the detection pin 62 has the cutting edge 6 of the cutting blade 6.
6 is provided with a contact position detection switch 130 for detecting contact with 6, and the proximity switch 112 is in the OFF state, that is, the output shaft 122 of the linear stepping motor 63 extends and the pressing member 111 causes the casing 110 to move.
When the contact position detection switch 130 is turned on in the state where the contact position detection switch 130 is moved to the right in FIG.
The blade width can be measured as described above by determining that 6a has come into contact with the blade edge 66. The amount of wear of the cutting blade 6 can be obtained from the difference in blade width before and after cutting.

In the above embodiment, the moving means 13 transmits the rotational force from the Z-axis lift motor 21 to the screw rod 19 to vertically move the pneumatic cylinder 11 up and down. In this embodiment, a rack is attached to the sliding plate 10 instead of the screw rod 19, and a pinion meshing with the rack is rotationally driven to slide the sliding plate 10.
May be moved to set the upper limit positions of the cutting blade 6 and the foot presser 14. Further, although the laminated thickness of the sheet material 3 is detected by using the foot presser 14, a laser beam or a distance measuring sensor may be used. Furthermore, these sensors may be provided inside or outside the cutting head 1. Furthermore, the laminated thickness of the sheet material 3 may be set in the cutting device by, for example, separately measured data.

[0054]

As described above, according to the present invention, the non-cutting position of the cutting blade is set according to the laminated thickness of the sheet material.
Regardless of the laminated thickness of the sheet material, the lower end of the cutting blade facing the sheet material is not spaced apart from the surface of the sheet material with a large gap, and the rising amount of the cutting blade is adjusted according to the laminated thickness of the sheet material, It is possible to eliminate unnecessary ascending / descending operations of the cutting blade and the operating time required for that, and shorten the time required to cut one cutting pattern, thereby improving the production efficiency. Such shortening of the cutting time causes a large difference in the production amount by accumulating in a large number of cutting times over a long period of time, and the productivity can be remarkably improved.

Further, according to the present invention, even when the cutting head travels over a wide range on the table, it is possible to detect the laminated thickness and set the non-cutting position at each traveling position.

Further, according to the present invention, it is possible to detect the laminated thickness by using the pressing member which is used as a material pressing member during cutting.

Further, according to the present invention, the cutting blade can be ground and the blade width can be measured at the non-cutting position. Since the amount of vertical movement of the cutting blade required for these processes is minimized, the production efficiency is improved.

Further, according to the present invention, the non-cutting position of the cutting blade is set so that the tip of the cutting blade has a predetermined distance from the upper surface of the sheet material, so that the cutting blade is lifted up from the sheet material. The minimum amount of movement according to the stacking thickness is to prevent an unnecessarily large gap between the upper surface of the sheet material and the tip of the cutting blade at the upper limit position during the operation and the descending operation of inserting the cutting blade into the sheet material. It is possible to raise and lower the cutting blade by means of, and to eliminate wasteful operation and operating time required therefor, thereby improving the production efficiency.

[Brief description of drawings]

FIG. 1 is a simplified perspective view showing a cutting head 1 included in a cutting device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view for explaining a displacement amount of a foot presser 14 with respect to a sheet material 3.

FIG. 3 is a perspective view showing an entire cutting device 37 including the cutting head 1.

FIG. 4 is an enlarged cross-sectional view taken along section line IV-IV in FIG.

5 is a cross-sectional view of the cutting head 1 viewed from above in FIG.

6 is a cross-sectional view of the cutting head 1 as seen from the left side of FIG.

FIG. 7 is a flow chart for explaining a control operation by control means 17.

FIG. 8 is a flow chart for explaining a control operation by a control means 17 according to another embodiment of the present invention.

FIG. 9 is a diagram showing a simplified configuration related to a moving means 13 and a foot presser 14 in the embodiment of FIG.

10 is a partial cross-sectional view of the embodiment of FIG.

11 is a cross-sectional view taken along the section line XI-XI in FIG.

FIG. 12 is a partially omitted cross-sectional view taken along section line XI-XI in FIG.

13 is a sectional view of the blade width detecting means 60 of the embodiment of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting head 3 Sheet material 4 Bristle brush 5 Support surface 6 Cutting blade 7 Upper surface 8 Lower surface 9 Head block 10 Sliding plate 11 Pneumatic cylinder 13 Moving means 14 Foot presser 15a R-axis main body 16 Displacement detecting means 17 Control means 21 Z-axis Lift motor 35 Rotary encoder 37 Cutting device 51 Operating ring 52, 58 Motor 55 Internal gear 57 Cam ring 60 Blade width detection means 62 Detection pin 69 Lock means

Claims (5)

[Claims] 1. A table having a supporting surface extending in one plane, on which sheet materials are stacked and placed, and reciprocating in a Z-axis direction that is driven and driven in the one plane and is perpendicular to the one plane. In a cutting machine having a cutting head provided with a cutting blade that is vibrated and cuts a sheet material, a stacking thickness setting means for setting a stacking thickness of the sheet material, and a cutting blade for a predetermined cutting position and a stacking thickness setting means. A moving means for moving up and down in the Z-axis direction between a non-cutting position where the tip of the cutting blade has a predetermined distance from the surface of the sheet material according to the set stacking thickness. And a cutting device. 2. The cutting device according to claim 1, wherein the stacking thickness setting means and the moving means are provided in the cutting head. 3. The laminated thickness setting means is provided with a pressing member that presses the surface of the sheet material at the peripheral edge of the cutting blade so as to be displaceable in the Z-axis direction according to the laminated thickness of the sheet material. 3. The cutting machine according to claim 2, wherein the laminated thickness of the sheet material is set depending on the position of contact with the surface of the sheet material. 4. The cutting head is provided with a polishing means capable of polishing a cutting blade at the non-cutting position and a blade width measuring means capable of measuring a blade width of the cutting blade at the non-cutting position. The cutting device according to any one of claims 1 to 3, which is characterized. 5. A cutting method in which a plurality of sheet materials are stacked and placed on a supporting surface extending in one plane, and a cutting blade movable up and down in a Z-axis direction perpendicular to the one plane is inserted into the sheet material. In the cutting method of cutting while reciprocally oscillating at the position, and retracting the cutting blade at the non-cutting position where the cutting material is pulled out from the sheet material, the tip of the cutting blade has a predetermined distance from the surface of the sheet material depending on the laminated thickness of the sheet material. A cutting method, wherein the non-cutting position is set so as to have.