JPH11320182A - Processing table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly transfer a workpiece on a processing table under the condition that a driving motor is stopped when the workpiece is transferred to the processing table. SOLUTION: A processing table 3 of a laser processing device is equipped with a large number of rotary shafts 42 parallely arranged to a frame 41, and a large number of discs 43 engaged with the rotary shafts 42. A sprocket 44 is mounted on one end of each rotary shaft 42, and one-way clutches 45 are mounted to each inner peripheral part. When a driving motor 48 is not operated, each rotary shaft 42 is freely rotated in one direction. However, when the driving motor 48 is operated, each rotary shaft is rotated in one direction at one time linked with the operation of the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing table, and more particularly to an improvement of a processing table suitable for a cutting apparatus such as a laser processing or a plasma processing.

[0002]

2. Description of the Related Art Conventionally, a laser processing apparatus comprising a plurality of rotating shafts arranged in parallel and rotatably supported on a shaft, and a large number of disks fitted on the respective rotating shafts and supporting a workpiece. Is known (for example, Japanese Utility Model 7-4)
No. 4385).

[0003]

In the above-mentioned conventional processing table, the rotating shaft is always linked with the drive source, so that not only at the time of loading into the processing table but also at the time of unloading, the drive table is linked with the drive source. Each rotating shaft and the disk fitted thereto are rotated. By the way, conventionally, there has been a demand that when discarding a workpiece to a machining table, it is not desired to make each disk interlock with a drive source.

[0004]

[Means for Solving the Problems] In view of such circumstances,
The present invention relates to a processing table of a cutting apparatus including a plurality of rotation shafts arranged in parallel and rotatably supported, and a large number of disks fitted to the respective rotation shafts and supporting a workpiece. In the above, a clutch is attached to the rotating shaft, and each rotating shaft is linked to a driving source via the clutch, and when the driving source is stopped, the rotating shafts can freely rotate in a predetermined direction. In addition, when the driving source is driven, the respective rotating shafts are simultaneously rotated in a predetermined direction in conjunction with the driving of the driving source.

[0005]

According to such a configuration, the drive shaft is stopped when the workpiece is carried into the processing table, so that the rotating shaft and the disk can freely rotate in a predetermined direction. On the other hand, when the drive source is driven, all the rotating shafts and the disc are simultaneously rotated in a predetermined direction via the clutch, so that the workpiece supported on the disc can be easily and quickly. Can be carried out.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIGS. 1 and 2, reference numeral 1 denotes a laser processing apparatus for performing required laser processing on a workpiece 2. The laser processing apparatus 1 includes a processing table 3 on which a workpiece 2 is placed. Above the processing table 3, a laser beam is applied to the workpiece 2 placed on the processing table 3. A known processing head 4 is provided. This processing head 4
Is movable in the X direction and the Y direction orthogonal thereto, and is configured to be able to move up and down. Thus, the workpiece 2 is supplied onto the processing table 3 and, while being held by the holding means described later, the processing head 4 irradiates the workpiece 2 with a laser beam to start cutting. By moving the head 4 in the XY directions, it is possible to make a difference in cutting the workpiece 2 into a required shape.

In this embodiment, the processing table 3 itself is improved as described later, and a positioning station A is provided at a position adjacent to the processing table 3, and the workpiece 2 is positioned at the positioning station A. And is supplied on the processing table 3 after being translated in the Y direction. The processing table 3 is arranged so that its longitudinal direction is parallel to the Y direction, and the positioning station A is arranged adjacent to the processing table 3 on an extension in the longitudinal direction. On the other hand, on the opposite side (right side) from the positioning station A, the machining table 3
A large number of support rollers 5 are rotatably provided at equal intervals adjacent to the other end in the longitudinal direction so as to be at the same height as the mounting surface of the processing table 3. The workpiece 2 that has been processed on the processing table 3 is discharged from the processing table 3 onto the support roller 5. In the positioning station A, a large number of support rollers 6 whose axes are aligned with the X direction are rotatably provided, and one end of the support rollers 6 has a workpiece mounted on the support rollers 6. 2
And a transfer means 7 for transferring the data to the processing table 3 while holding the data. The heights of the upper ends of the support rollers 6 are all the same, and are set to the same height as the mounting surface of the processing table 3. At a position near the left end of the positioning station A, a positioning pin 8 is disposed so as to be vertically movable upward and vertically. Locating pin 8
Are raised and lowered by a control device (not shown) to a lower end position below the support roller 6 and a rising end position protruding above the support roller 6.
In a state where the positioning pin 8 is located at the rising end position, the workpiece 2 is supplied onto the support roller 6 of the positioning station A, and then the workpiece 2 is supplied to the positioning pin 8.
The workpiece 2 is positioned in the Y direction in the positioning station A by abutting a short side which is one end in the longitudinal direction of the workpiece 2. In addition,
As will be described later, the positioning of the workpiece 2 in the X direction in the positioning station A is performed by bringing one side in the longitudinal direction of the workpiece 2 into contact with the gripping mechanism 12 of the transfer means 7. The positioning pin 8 and the gripping mechanism 12 of the transfer means 7 constitute a positioning means.

As shown in FIG. 3 and FIG.
Is a machining table 3 from one side of the positioning station A.
The guide rail 11 is disposed parallel to the Y direction on one side, and a set of six gripping mechanisms 12 movably attached to the guide rail 11 is provided (FIG. 1). Since all six gripping mechanisms 12 have the same configuration, only the configuration of the single gripping mechanism 12 will be described. That is, as shown in FIGS. 3 to 5, the gripping mechanism 12 is supported by a movable base 13 slidably engaged with the guide rail 11 and supported in the vertical direction. Rotary actuator 14 and air cylinder cylinder 15 mounted upward
And are provided. The transfer means 7 has an endless chain 16 provided so as to surround the guide rail 11. Both ends of the movable base 13 of each gripping mechanism 12 at adjacent positions are connected by a connecting member (not shown),
As a result, the movable bases 13 of the six gripping mechanisms 12 are located at predetermined intervals in the Y direction. The movable base 13 of each gripping mechanism 12 is connected to the chain 16 by a bracket (not shown). The chain 16 is interlocked with a drive source (not shown), and when the drive source is rotated in the normal or reverse direction by a control device (not shown), the chain 16 runs in the normal or reverse direction. Thereby, each gripping mechanism 12 is reciprocated between the positioning station A shown by the solid line in FIG. 1 and the position adjacent to the side of the working table 3 shown by the imaginary line. A plate-like support member 17 is horizontally connected to the upper end of the movable base 13. The support member 17 is provided with a rotary actuator 14.
Are linked. A drive shaft 14A of the rotary actuator 14 is projected upward through a through hole of the support member 17, and a small-diameter gear 18 is attached to the drive shaft 14A.
Is fitted. The gear 18 meshes with a large-diameter gear 21 disposed at an adjacent position.

As shown in FIG. 5, the supporting member 17 is provided with a stepped through hole 17a having a large diameter on the lower side.
The stepped rotary shaft 2 is inserted into the through hole 17a via a bearing.
2 is rotatably supported. The large-diameter gear 21 is provided on the outer peripheral portion of the rotary shaft 22 protruding above the through hole 17a.
Is fitted. On the other hand, the housing of the air cylinder 15 facing vertically upward is integrally connected to the lower end of the rotating shaft 22. The lower end shaft portion of the rotating shaft 22 and the radial portion on the left side thereof in FIG. 5 are continuously notched.
The bases of a pair of upper and lower clamp members 23A and 23B are inserted into a space between the end surface (upper surface) of the housing of the air cylinder 15 and a cutout portion at the lower end of the rotating shaft 22 above the housing. The base of the lower clamp member 23B is fixed to the end surface (upper surface) of the housing of the air cylinder 15 and is supported horizontally. On both sides of the upper surface of the clamp member 23B, wedge-shaped symmetrical bulging portions 23a are formed. The distal end of the symmetrical bulging portion 23a is retracted toward the base side (right side) by a predetermined dimension from the original distal end of the lower clamp member 23B. The height of the upper surface of the distal end portion of the lower clamp member 23 </ b> B matches the height of the upper end of the support roller 6 provided in the positioning station A. As shown in FIG.
A, 23B is positioned at a forward position shown by a solid line, and one end in the longitudinal direction of the workpiece 2 is brought into contact with the tip of the bulging portion 23a, so that the workpiece 2 at the positioning station A is moved. Can be positioned in the X direction. The pair of upper and lower clamp members 23 </ b> A and 23 </ b> B of each gripping mechanism 12 connect the movable base 13 of each gripping mechanism 12 to the chain 16 so as to be located between the adjacent support rollers 6. On the other hand, the upper clamp member 23A is disposed between the left and right bulges 23a on the upper surface of the clamp member 23B, and a pin 24 having a longitudinal center portion penetrated by both bulges 23a.
Thereby, it can swing with respect to the lower clamp member 23B. The base of the upper clamp member 23A is swingably connected to the upper end of the piston 15A of the air cylinder 15. When the piston 15A of the air cylinder 15 is lowered, the distal end of the upper clamp member 23A is raised, and the distal end of the clamp member 23A and the distal end of the lower clamp member 23B are opened. On the other hand, when the air cylinder 15 is actuated by a control device (not shown) and the piston 15A is raised, the distal end of the upper clamp member 23A is lowered, and the distal end of the clamp member 23A and the lower side are moved downward. Of the clamp member 23B is closed. In this way, the clamp members 23A and 23B can be opened and closed by the air cylinder 15.

A substantially fan-shaped plate-like stopper member 25 is integrally connected to the lower end (lower end surface) of the housing of the air cylinder 15 (FIG. 5). Stopper member 25
The angle between two sides adjacent to the main position of the fan is set to 90 degrees, and these two sides are alternately brought into contact with the end face of the movable base 13. That is, when the rotary actuator 14 is rotated in the normal or reverse direction, the gear 1
Rotating shaft 22, clamp members 23A, 2 via 8, 21
3B, the air cylinder 15 and the stopper member 25 are integrally rotated. The clamp members 23A and 23B are stopped at a position where one of the two sides of the stopper member 25 abuts on the end surface of the movable base 13. (FIG. 5). Thereby, as shown by a solid line in FIG. 4, the clamp members 23A and 23B advance to the position parallel to the X direction, and the clamp members 23A and 23B shown by imaginary lines.
Are alternately moved to a retreat position parallel to the Y direction. Then, the gripping mechanism 12 is positioned at the positioning station A, and the clamp members 23A, 23
B is in the forward position, and the upper end of the upper clamp member 23A is further raised by the air cylinder 15, and the supporting roller 6 of the positioning station A is
The workpiece 2 is supplied thereon. Thereafter, the workpiece 2 is
First, the workpiece is moved in the Y direction, and one end in the longitudinal direction of the workpiece 2 contacts the above-described positioning pin 8 to perform the positioning in the Y direction. Next, since the workpiece 2 is pushed toward the gripping mechanism 12 by the operator, one side in the longitudinal direction of the workpiece 2 is placed on the upper surface of the distal end of the lower clamp member 23 </ b> B in each gripping mechanism 12. Then, it comes into contact with the tip of the bulging portion 23a and is stopped. Thus, the positioning of the workpiece 2 in the X direction at the positioning station A is completed. That is, the workpiece 2 is positioned at a predetermined position in the XY direction at the positioning station A. Thereafter, the air cylinder 15 of each gripping mechanism 12 is raised synchronously by a control device (not shown), so that one side in the longitudinal direction of the workpiece 2 is synchronously gripped by the clamp members 23A and 23B of each gripping mechanism 12. Is done. Thereafter, the control device rotates the drive source of the chain 16 forward, so that the chain 16 runs clockwise. Accordingly, each gripping mechanism 12 and the workpiece 2 gripped by the gripping mechanism 12 are translated on the processing table 3 along the guide rail 11.

Next, as shown in FIG.
A first sensor 26 and a second sensor 27 are fixed to a fixed frame 29 at a predetermined position in the Y direction at a position above the rail 11 which is a side portion of the first sensor 26. At a position near A, an air cylinder 28 is horizontally mounted on a fixed frame 29.
On the other hand, the gripping mechanism 12 located on the leftmost side in FIG.
The movable base 13 has an engagement hole 13A at a predetermined height (FIGS. 3 and 4). As described above, in the process in which the workpiece 2 is carried into the processing table 3 by being held by each of the gripping mechanisms 12 and running the chain 16, first, the rearmost gripping is performed by the first sensor 26. When the end of the movable base 13 of the mechanism 12 is detected, the traveling speed of the chain 16 is reduced to a predetermined speed by a control device (not shown). Next, when the second sensor 27 detects the end portion of the movable base 13 of the gripping mechanism 12 located at the most rear side, the control device stops the operation of the drive source of the chain 16. As a result, the movable base 13 of the gripping mechanism 12 at the rearmost end in the loading direction of the workpiece 2 is located at a position facing the air cylinder 28.
Move the piston of the air cylinder 28 forward to move the movable base 1
It is inserted into the engagement hole 13A on the third side. As a result, the workpiece 2 supplied on the processing table 3 is
This means that it has been positioned at the upper predetermined position in the XY directions.
Thereafter, one side of the workpiece 2 is synchronously gripped by a set of six gripping mechanisms 31 provided below the side of the processing table 3, while a set of six gripping mechanisms on the side of the transfer mechanism 12 are provided. 1
2 releases the gripping state of the workpiece 2 by the clamp members 23A and 23B by raising the air cylinder 15. At the same time, the clamp members 23A and 23B are rotated 90 degrees from the forward position to the retracted position in conjunction with the rotary actuator 14 and retracted (FIG. 4). Thereafter, the chain 16 is driven in the opposite direction to the above-described loading direction when the driving source of the chain 16 is reversed by the control device, so that each gripping mechanism 12 returns to the original positioning station A. I do. The transfer means 12 repeats the above-described operation to carry the workpiece 2 from the positioning station A onto the processing table 3.

Next, as shown in FIG.
A pair of six gripping mechanisms 31 provided at positions adjacent to each other are provided with each gripping mechanism 12 in the loading direction when each gripping mechanism 12 on the transfer means 12 side loads the workpiece 2 onto the processing table 3.
Are arranged on the rear side (left side) adjacent to each other. Since all the six gripping mechanisms 31 have the same configuration, the configuration of the single gripping mechanism 31 will be described. As shown in FIGS. 3 and 4, the gripping mechanism 31 is vertically mounted on a fixed frame (not shown). An air cylinder 32 is provided for connection. A lower clamp member 33B is horizontally fixed to the upper end of the piston of the air cylinder 32, and two support pins 3 are provided near and above the clamp member 33B.
The upper clamp member 33 </ b> A is swingably attached via a pair 4 and a pair of left and right links 35. The housing of the small air cylinder 36 is integrally connected to the bottom surface of the base of the lower clamp member 33B toward the upper side. The piston of the air cylinder 36 penetrates a through hole in the base of the lower clamp member 33B, and is swingably connected to the base of the upper clamp member 33A via a pin 37. When the piston of the air cylinder 36 is lowered by the control device, the distal end of the upper clamp member 33A is raised, and the distal end of the upper clamp member 33A and the distal end of the lower clamp member 33B are opened. Is done. On the other hand, when the piston of the air cylinder 36 is raised by the control device, the distal end of the upper clamp member 33B is lowered, and the distal end of the upper clamp member 33A and the lower clamp member 33B are moved downward. The tip is closed. By raising and lowering the piston of the air cylinder 36 in this manner, the clamp member 33
A and 33B are opened and closed. When the air cylinder 32 is not operated, the clamp members 33A and 33B are located at the descending end positions shown in FIGS. 3 and 4. However, the air cylinder 32 is controlled by the control device.
Is operated, and the piston is raised to a rising end position (not shown), the clamp members 33A and 33B are also raised to the rising end position. When the clamp members 33A and 33B are at the lower end position, they are located slightly below the mounting surface of the processing table 3, that is, the bottom surface of the workpiece 2 supplied by the gripping mechanism 12 of the transfer means 7. ,
Clamp members 23A, 23 of the gripping mechanism 12 of the transfer means 7
B and the clamp members 33A, 33B of the gripping mechanism 31 do not interfere with each other. Also, when at the lower end position, the upper clamp member 33A is in an open state. At this time, the distal end of the upper clamp member 33A is retracted by a predetermined amount toward the base side by the link 35 with respect to the distal end of the lower clamp member 33B. On the other hand, when both clamp members 33A and 33B are raised to the rising end position by the air cylinder 32, the upper surface of the distal end of the lower clamp member 33B overlaps with the bottom surface on one side of the workpiece 2 from below, and ,
The tip of the upper clamp member 33B is supported above the workpiece 2 without interfering with one side of the workpiece 2. Thereafter, the air cylinder 36 is actuated by the control device, and the piston thereof is raised, so that one end of the workpiece 2 is gripped and fixed by the distal ends of both clamp members 33A and 33B. . As described above, when the workpieces 2 carried into the processing table 3 are simultaneously held by the set of six holding mechanisms 31, positioning of the workpieces 2 in the XY directions on the processing table 3 has already been completed. Therefore, laser processing by the processing head 4 can be started immediately. When the required laser processing on the workpiece 2 is completed, the six gripping mechanisms 3
1 are released simultaneously, and both clamp members 33 are released by the air cylinder 32 of the gripping mechanism 31.
A and 33B are lowered to the lower end position.

Next, the structure of the working table 3 of the present embodiment will be described with reference to FIGS. 6 to 8. The working table 3 supports a large number of rotating shafts 42 on a rectangular frame 41 so as to be rotatable at equal intervals. ing. The rotating shafts 42 are supported at the same height, and thin disks 43 are fitted on the outer peripheral portion of the rotating shaft 42 at equal intervals. The large number of disks 43 are rotated on a vertical plane, and the bottom of the workpiece 2 is supported by the upper portion of the outer periphery of the large number of disks 43. The height at which the large number of disks 43 support the workpiece 2 is the same as the height at which the workpiece 2 is supported by the support roller 6 provided at the positioning station A and the support roller 5 provided at the discharge side. You have set. In this embodiment, a two-tooth sprocket 44 is attached to one end of each rotating shaft 42, and a conventionally known one-way clutch 45 is attached to the inner periphery of the sprocket 44 (FIG. 8). Chains 46 are respectively bridged between the sprockets 44 at adjacent positions. Further, the sprocket 44 at the position of the left end in FIG.
It is linked to the sprocket 51 on the side. Therefore,
When the drive motor 48 is rotated by the control device, each rotating shaft 42 and the disk 43 provided thereon rotate in one direction in synchronization. More specifically, the rotation shafts 42 and the rotation shafts 42 are synchronously rotated clockwise in FIG.
On the other hand, when the drive motor 48 is stopped, each of the rotating shafts 42 and the rotating shafts 42 provided thereon are independently rotated in only one direction. More specifically, each rotation shaft 42 is only clockwise in FIG.
And a rotating shaft 42 provided thereon is rotated. The connection and disconnection may be controlled by replacing the one-way clutch 45 with a normal clutch.

The working table 3 of the present embodiment is constructed as described above. When the drive motor 48 is stopped, the workpiece 2 is moved from the positioning station A by the transfer means 6 as described above. Processing table 3
It is carried in. The rotating shaft 42 on the processing table 3 side and the disk 43 provided on the rotary shaft 42 rotate in the above-described direction, that is, only in the direction in which the workpiece 2 is carried in. Supplied smoothly. Then, the workpiece 2 supplied onto each disk 43 is positioned in the XY directions on the processing table 3 as described above, and then one side is fixed by the gripping mechanism 31. In this state, the workpiece 2 supported on each disk 43 (the processing table 3) is irradiated with a laser beam from the processing head 4 to start processing. Thereafter, when the required cutting is completed, the gripping state of the workpiece 2 by the gripping mechanism 31 is released, and the gripping mechanism 31 is lowered to the lower end position. At the same time, the drive motor 48 is controlled by the control device.
Is rotated, the rotating shaft 42 is synchronously rotated in one direction. Therefore, since each disk 43 is also rotated clockwise in FIG. 2 in synchronization, the workpiece 2 supported by each disk 43 after processing is quickly discharged to the adjacent supporting roller 5 side. .

The laser processing apparatus 1 of this embodiment is provided with a positioning station A adjacent to the processing table 3 and has a transfer means 7. The workpiece 2 carried on the processing table 3 has already been positioned by the transfer means 7. Therefore, the workpiece 2 on the processing table 3 can be immediately gripped by the gripping mechanism 31 as a holding unit. Therefore, the time required from the loading of the workpiece 2 on the processing table 3 to the start of processing can be significantly reduced as compared with the conventional case.

In this embodiment, the one-way clutch 45 is attached to the disk 43 of the rotating shaft 42 constituting the machining table 3.
The drive motor 48 is not operated when the workpiece 2 is carried into the processing table 3 by the transfer means 7. Therefore, the rotating shaft 42 and the disc 4
3 rotates freely in one direction, so that the workpiece 2 is smoothly carried into the disk 43. On the other hand, when the laser processing is completed, the drive motor 48 is operated, and all the rotating shafts 42 and the disks 43 are simultaneously rotated.
The workpiece 2 supported on the workpiece can be discharged easily and quickly. As described above, in this embodiment, when the workpiece 2 is carried into the machining table 3, each disk 43 is driven by the drive motor 4.
8 can not be linked. In the above embodiment, as shown in FIG. 4, the air cylinder 28 is engaged with the engagement hole 13A of the movable base 13 to position the workpiece 2 on the processing table 3 in the XY directions. However, if a servomotor is employed as a drive source for running the chain 11, the engagement hole 13A as the positioning means and the air cylinder 28 can be omitted.

[0017]

As described above, according to the present invention, it is possible to obtain an effect that each disk can be prevented from interlocking with the drive source when the workpiece is carried into the processing table.

[Brief description of the drawings]

FIG. 1 is a plan view of a laser processing apparatus 1 showing one embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of a main part along line III-III in FIG. 1;

FIG. 4 is an enlarged plan view of a main part of FIG. 1;

FIG. 5 is a sectional view of a main part taken along line VV of FIG. 4;

FIG. 6 is an enlarged plan view of a main part of FIG. 1;

FIG. 7 is a left side view of a main part of FIG. 6;

FIG. 8 is an enlarged view of a main part of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Laser processing apparatus 2 Processing table 42 Rotation axis 43 Disk 45 One-way clutch 48 Drive motor

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI B65G 13/02 B65G 13/02 39/04 39/04

Claims (2)

[Claims] 1. A cutting apparatus comprising: a plurality of rotating shafts arranged in parallel and rotatably supported by a plurality of disks; and a plurality of disks fitted to the respective rotating shafts and supporting a workpiece. In the table, a clutch is attached to the rotating shaft, and each rotating shaft is linked to a driving source via the clutch. When the driving source is stopped, the rotating shafts freely rotate in a predetermined direction. A machining table for the cutting machine, wherein each of the rotating shafts is simultaneously rotated in a predetermined direction when the driving source is driven. 2. The method according to claim 1, wherein the operation of the drive source is stopped when the workpiece is loaded onto the processing table, and the drive source is activated when the workpiece is unloaded from the processing table. A processing table of the cutting apparatus according to 1.