JPH05138471A - Material support pallet - Google Patents

Abstract

PURPOSE:To maintain the clamping force for a long time, and clap and unclamp without manual operation to automate a line. CONSTITUTION:A clamp body 43 as a part of a work clamp 5 is locked with a pallet main body 3, and a piston 47 provided with a clamp raw 49 is inserted to the clamp body 43. This piston 47 is always energized to the projecting direction by a built-in spring 63 to form a fluid pressure chamber 61 over the clamp body 43, and this fluid pressure chamber 61 is communicated with a compressed fluid generating device 7. A spiral groove 65 is formed on the circumference of the lower end of the piston 47 in a range at about 1/4, and a linear groove 69 extended to the axial core direction is communicated with the terminal end of the spiral groove 65, and a guide pin 67 to be fitted in the spiral groove 65 is provided in the clamp body 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material support pallet having a clamp for fixing a material on the pallet.

[0002]

2. Description of the Related Art Conventionally, a pallet for placing a material has been used as a plate material carrying-in / out apparatus for carrying a material into or out of a thermal cutting machine such as a plasma machine or a laser machine. As a means for fixing the material placed on the pallet, for example, a plurality of clamp members provided on the pallet are manually operated to fix or release the material on the pallet. Is.

[0003]

By the way, in the above-mentioned conventional means for fixing the material to the pallet, the material placed on the pallet is fixed or released by the manual operation. It is not possible to automate the line manually. Further, in the conventional fixing means, when the material is manually operated and fixed to the pallet by manipulating the clamp member, there is a problem that the clamp member is loosened by the acceleration / deceleration motion during processing and the clamp force cannot be maintained.

In order to solve the above problems, the object of the present invention is to maintain the clamping force for a long time even during the acceleration / deceleration motion during machining, and to perform clamping and unclamping without manual labor, thus supporting the material automatically. To provide pallets.

[0005]

In order to achieve the above object, the present invention provides a work clamp for gripping and fixing the material to one side of a pallet that supports the material to be processed. A fluid pressure chamber provided in the clamp body is provided with a vertically movable piston integrally provided with a clamp jaw for fixing the material, and a spiral groove is provided on one of the inner surface of the fluid pressure chamber or the inner surface of the piston. On the other hand, a material support pallet was constructed by providing a guide pin engaged with the spiral groove and a part of the pallet with a compressed fluid generator for generating a compressed fluid to be supplied to the fluid pressure chamber.

[0006]

By using the material support pallet of the present invention, the material is first placed on the material support pallet. At this time, a plurality of work clamps provided on the material support pallet are in positions where they do not contact the material, that is, in the retracted position.

Next, when the compressed fluid generator is operated, the compressed fluid is supplied into the fluid pressure chamber provided in the work clamp, and the piston integrally provided with the clamp jaw descends. Since the guide pin attached to the clamp body is inserted into the spiral groove formed on the outer circumference of the piston when the piston descends, the piston swivels and guides the material while being guided by the spiral groove when the piston descends. It is positioned at a position where it can be clamped. Still further,
By lowering the biston, the material is securely fixed on the pallet.

In order to release the clamp, the compressed fluid generating device is reversely operated, so that the clamp jaw integrally provided on the piston is separated from the material and pivots back to the retracted position. Thus, automation can be performed without human intervention.

[0009]

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, the overall structure of the material support pallet 1 will be briefly described. Referring to FIG. 6, the pallet body 3 of the material supporting pallet 1 is configured by combining appropriate steel materials in a frame shape, and a plurality of (three in this embodiment) work clamps 5 are provided on one side. Has been. A compressed fluid generator 7 is mounted in the pallet body 3 as a drive source of the work clamp 5, and the compressed fluid generator 7 and the work clamp 5 are connected by a pipe material 9. A recessed member 11 is provided at an appropriate position of the pallet body 3 to be engaged when the material support pallet 1 is loaded and unloaded. The hatched portion in the figure represents the material W.

The compressed fluid generator 7 will be described in more detail. Referring to FIGS. 4 and 5, the compressed fluid generation device 7 is mounted in the recessed member 11 inside the pallet body 3. The compressed fluid generating device 7 is shown in cross section. The upper half cross section of the central axis shows the state before clamping and the lower half cross section shows the state during clamping. (Refer to FIG. 4) The outer cylinder 13 constituting the compressed fluid generator 7 is integrally configured by screwing a base outer cylinder 13a and a tip outer cylinder 13b with a screw portion 15. The base outer cylinder 13a is integrally engaged with the recessed member 11, and the base outer cylinder 1
A piston actuating screw 17 is mounted inside 3a so as to be rotatable and immovable back and forth. In addition,
A hole 19 is provided in the recess 11 to rotate the piston actuating screw 17.

A nut 21 screwed to the piston actuating screw 17 is movably mounted in the base outer cylinder 13a, and the nut 21 is inserted into a slit 23 formed along the axis of the base outer cylinder 13a. The attached pin 25 engages,
It prevents the nut 21 from rotating. In addition, the nut 21
A plurality of holding springs 27 (for example, disc springs) are stacked on the tip (left side in FIG. 4) of and are supported by the piston 29. In addition, at the tip of the piston 29, the tip outer cylinder 1
A seal member 33 is mounted to prevent oil leakage when reciprocating in the oil chamber 31 provided in 3b, and a stopper member 35 is integrally provided at the rear portion of the piston 29.

Further, inside the tip end outer cylinder 13b,
An escape hole 37 is formed so that the holding spring 27 can enter, and an oil passage 39 is provided at the tip of the tip outer cylinder 13b.
The pipe member 9 is connected to and communicates with the oil passage 39 via a joint 41.

With the above structure, the members of the compressed fluid generator 7 are located in the state shown in the upper half sectional view of FIG. 4 at all times, that is, when the material W is not placed on the pallet body 3. That is, the nut 21 is fully screwed into the piston actuating screw 17, the holding spring 27 does not generate an urging force, and the piston 29 is in the retracted limit. The oil chamber 31 is filled with oil.

When the material W is clamped from the above-mentioned standby position, although not shown, the piston operating screw 17 is rotated by an appropriate driving member to move the nut 21 forward (left side in FIG. 4). .. When the nut 21 moves forward, the piston 29 moves forward via the holding spring 27, and the oil filled in the oil chamber 31 is sent to the pipe material 9 through the oil passage 39 and sent into the work clamp 5 described later, and the material W Is clamped by the work clamp 5. When the material W is clamped, the piston 29 in the oil passage 31 has a margin for the L1 dimension as shown in FIG.
Further, the holding spring 27 and the escape hole 37 that are in close contact with each other have a margin for the dimension L2.

The relationship between this L1 size and L2 is L1 = L2
Therefore, the clamping force of the work clamp 5 can be maintained for a long time by supplementing the oil leakage with the allowances L1 and L2.

Next, the work clamp 5 will be described with reference to FIGS.
Referring also to, the clamp body 43 is vertically fixed to the pallet body 3 by a plurality of set screws 45, the piston 47 is inserted into the clamp body 43, and a plurality of clamp jaws 49 are provided at the tip of the piston 47. It is integrally provided by a tightening bolt 51. A clamp claw 53 is formed on the lower surface side of the tip of the clamp jaw 49, and a clamp claw 55 is formed on the upper surface of the clamp body 43 facing the clamp claw 53.

The above-mentioned pipe material 9 is attached to the clamp body 43.
A three-way joint 57 to which is connected is attached, and a fluid pressure chamber 61 is provided inside the clamp body 43 so as to communicate with the flow path 59 of the three-way joint 57.

The piston 47 is inserted into the clamp body 43, is urged in the protruding direction by the spring 63, and has a spiral groove 65 formed upward from the lower end of the piston 47. A guide pin 67 that engages with the spiral groove 65 is provided on the clamp body 43, and the spiral groove 6
5 is formed on the outer circumference of the piston 47 in a range of about 1/4, and the spiral groove 65 is formed with a linear groove 69 extending vertically upward from the end. (Refer to FIG. 2) With the above configuration, its operation will be described with reference to FIGS. 1 to 3. 1 shows a standby state before clamping the material W, FIG. 2 shows a state in which the material W is clamped, and FIG. 3 shows a state in which the clamp is completely tightened.

The work clamp 5 is always in the position shown by the chain double-dashed line in FIG. 5, and is in the state shown in FIG. That is, the piston 47 has the spring 63.
The guide pin 67 is located at the initial end of the spiral groove 65 due to the urging force of the guide pin 67. In this state, the material W does not interfere with the work clamp 5 and the clamp body 43
It is placed on the clamp claw 55 of.

Then, when the above-mentioned compressed fluid generator 7 is operated, the pressure oil passes through the pipe material 9 and the flow path formed in the clamp body 43 from the three-way joint 57 attached to the clamp body 43 of each work clamp 5 Fluid pressure chamber 6 through 59
Oil is sent to 1. When the fluid is fed to the fluid pressure chamber 61, the spiral groove 65 formed in the piston 47 rotates the piston 47, and when the fluid pressure chamber 61 is filled with the pressure oil, the linear groove 69 communicating with the spiral groove 65 causes the piston 47 to rotate. 47 does not rotate and descends in the vertical direction.

That is, the clamp jaw 49 integrally locked to the piston 47 is rotated by a predetermined amount, and the material W can be held by the clamp claw 53 formed on the clamp jaw 49. This state is shown in FIG.

When the material W is an extremely thin material or when the work clamp 5 is tightened, the piston 47 is vertically lowered by the linear groove 69 by continuing the oil feeding. This state is shown in FIG. When the clamp is released, the piston operating screw 1 of the compressed fluid generator 7 is released.
By reversing 7 to drain oil in the fluid pressure chamber 61, the urging force of the spring 63 causes the piston 47 to rise while rotating through the linear groove 69 and the spiral groove 65,
Return to the standby position.

As described above, the operation of the compressed fluid generating device 7 allows the material W to be clamped and unclamped freely, and the line can be automated without requiring manpower. Further, since the compressed fluid generation device 7 is provided with a margin for the amount of pressure oil to be generated, the clamping force can be maintained for a long time even if there is an acceleration / deceleration motion during machining.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, although the material supporting pallet has been described in the present embodiment, the material supporting pallet may be used as a processing pallet or a product supporting pallet.

[0026]

As can be understood from the above description of the embodiments, according to the present invention, the compressed fluid generating device is operated to send the pressure oil into the fluid pressure chamber provided in the clamp body.
The piston provided with the clamp jaw is lowered by the pressure oil sent into the fluid pressure chamber, and the spiral groove formed on the outer circumference of the piston causes the piston to rotate and descend to clamp the material. Further, the compressed fluid generator has a surplus amount of pressure oil to be supplied.

Thus, the clamping force can be maintained for a long time even during the acceleration / deceleration motion during processing, and clamping and unclamping can be performed without human intervention, and the line can be automated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a work clamp which is a main part of the present invention.

FIG. 2 is an operation explanatory view of a work clamp.

FIG. 3 is an operation explanatory view of a work clamp.

FIG. 4 is an enlarged cross-sectional view showing a main part of the present invention and taken along the arrow IV in FIG.

5 is a plan view of FIG.

FIG. 6 is a plan view of a material support pallet according to an embodiment of the present invention.

[Explanation of symbols]

 1 Material Support Pallet 5 Work Clamp 7 Compressed Fluid Generator 43 Clamp Body 47 Piston 49 Clamp Jaw 61 Fluid Pressure Chamber 65 Spiral Groove 67 Guide Pin

Claims (1)

[Claims] 1. A work clamp for gripping and fixing the material is provided on one side of a pallet for supporting a material to be processed, and the material is fixed in a fluid pressure chamber provided in a clump body of the work clamp. A piston integrally provided with a clamp jaw is provided so as to be vertically movable, a spiral groove is provided on one of the inner surface of the fluid pressure chamber or the circumferential surface of the piston, and a guide pin engaged with the spiral groove is provided on the other side, and the pallet is also provided. 1. A material supporting pallet, characterized in that a compressed fluid generating device for generating a compressed fluid to be supplied to the fluid pressure chamber is provided in a part thereof.