JPH071187A - Device for positioning and fixing - Google Patents

Abstract

PURPOSE:To automatize positioning and fixing, and to shorten the arrangements time in a time to change a work size. CONSTITUTION:Two sets of pushers 6 and stoppers 7 are installed by making pushing directions of the pushers different, a work 1 is pushed to the stoppers 7 with the pushers 6 by using a cylinder force, and automatically positioned. The work 1 is pulled on a table 3 and clamped with clamps 8. The positions of all the pushers 6, the stoppers 7, and the clamps 8 are made freely adjustable in the radiation directions from the device center 4, and the arrangements time in a time to change the work size can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning and fixing device, and can be used, for example, for positioning and clamping a dice column on a rotary jig for automatic welding.

[0002]

2. Description of the Related Art A rotary jig for automatic welding such as a rotary table of a substantially cubic (dice type) steel column (hereinafter referred to as a dice column) (a column temporarily attached with a diaphragm is attached to the rotary jig in any posture) Positioning and clamping of the diaphragm to the column by automatic welding to the column) have been conventionally performed as follows.
Positioning of the column on the table is performed by pressing the outer surface of the column against guide bars arranged at two points (opposing 90 °) on the table. For the clamp, a piece is applied to the corner of the diaphragm (a member of the end plates at both ends of the column, the periphery of which protrudes like a flange from the outer surface of the column), and the clamp is fastened to the mounting base with bolts. If the diaphragm thickness changes, insert a liner under the clamp piece to adjust the height. If there is a change in column size, loosen the fastening bolts on the mounting base, move the clamps into place, and tighten the bolts.

[0003]

However, the conventional positioning and clamping have the following problems. In positioning, the outer surface of the column is merely pressed against the guide bar manually, so that the automatic positioning is insufficient due to the pressing force, and the certainty of position determination is poor. Since the diaphragm thickness has a tolerance, it is necessary to adjust the liner to absorb the difference in tightening height. In addition, the setup work time tends to be long due to the necessity of bolt fastening of the clamp piece and adjustment of the liner. When changing the column size, the clamps are fixed to the mounting base with bolts, so the work time tends to be long.

The object of the present invention is to ensure the certainty of the position of the work, to have a short working time for fixing (clamping) the work, and to have a short working time for adjustment and setup when the work size changes. , Providing a positioning and fixing device.

[0005]

To achieve the above object, a positioning and clamping device according to the present invention comprises the following devices. That is, two sets of pushers and stoppers arranged around the center of the apparatus and a plurality of clamps are provided, and each pusher has a cylinder whose pushing direction is set to the horizontal direction. Pushing directions are different from each other, and each pusher is positionally adjustable by a screw mechanism in the horizontal direction and in the radial direction from the center of the device, and each stopper is installed in front of the pushing direction of the corresponding pusher. , Each stopper can be horizontally adjusted by a screw mechanism and in the radial direction from the center of the device, each clamp has a cylinder whose attracting direction is vertical, and each clamp has a screw mechanism. A positioning and fixing device that is positionally adjustable in the horizontal direction and in the radial direction from the center of the device.

[0006]

In the above device of the present invention, two sets of pushers and stoppers whose pushing directions are different from each other are provided,
Moreover, since the pusher is designed to obtain a pushing force by the cylinder, when the work is pushed by the pusher and pressed against the stopper, the work is automatically positioned in the center of the device,
Positioned. Therefore, the position of the work can be reliably identified. Also, since each clamp has a cylinder whose pulling direction is vertical, the clamp is automated by changing from a bolt to a cylinder, and the change in the thickness of the workpiece fixing part is absorbed by the cylinder stroke, so the clamp operating time is Shortened. In addition, the position of the clamp can be adjusted in the horizontal direction by the screw mechanism, so when the work size changes, it is only necessary to adjust the position of the clamp by the screw mechanism, loosening the bolt, moving the clamp,
Since it is not necessary to tighten bolts, the work time and setup time for adjusting the clamp position to accommodate changes in the work size are shortened.

[0007]

1 to 5 show a preferred embodiment of the present invention. The work 1 to be positioned and fixed is, for example, a dice column. The work 1 has a work fixing portion 2 protruding from the outer surface of the column. When the work is a dice column, the work fixing portion is a diaphragm. The work 1 is positioned and fixed on the table 3. Table 3
Is, for example, a rotary jig for automatic welding. The turntable 3 is rotatable in the horizontal direction with the device center 4 in FIG. 1 as the rotation center, and is also rotatable in the vertical direction with the other rotation center 5 as the center as shown in FIG.
As a result, the work 1 attached to the table 3 can take any posture. However, since the work 1 is swung together with the table 3, it has to be clamped on the table 3, and therefore a clamp mechanism is provided. Further, the work 1 is also provided with a positioning mechanism described below so as to be positioned concentrically with the rotation center 4 of the table 3.

The table 3 has two sets of pushers 6 and stoppers 7 (two pushers 6 and two stoppers 7).
And a plurality of, for example, four clamps (clamping device)
8 are attached, and each is arranged around the center 4 of the apparatus.

As shown in FIG. 2, each pusher 6 has a cylinder whose pushing direction is horizontal, for example, a hydraulic cylinder 9. The push plate at the tip of the rod of the hydraulic cylinder 9 pushes the work fixing portion 2. The pushing directions of the hydraulic cylinders 9 of the two pushers 6 are different from each other, and are, for example, at right angles to each other. The position of each hydraulic cylinder 9 can be adjusted in the horizontal direction and in the radial direction from the center of the device by a screw mechanism 10. This screw mechanism 10
Has a screw shaft 11 rotatably connected to the table 3 side and axially immovable, and a screw member 12 integrally provided on the hydraulic cylinder 9 side.
1 and the female screw member 12 are meshed with each other. By rotating the handle 13 integrally attached to the screw shaft 11, the screw shaft 11 is rotated around its axis, the female screw member 12 is moved in the axial direction of the screw shaft 11, and the position of the hydraulic cylinder 9 is changed. adjust.

Each stopper 7 is installed in front of the corresponding pusher 6 in the pushing direction. Each stopper 7
The screw mechanism 14 enables position adjustment in the horizontal direction and in the radial direction from the center 4 of the apparatus. This screw mechanism 1
4 has a screw shaft 15 that is rotatably connected to the table 3 side and is immovable in the axial direction, and a screw member 16 that is integrally provided on the stopper 7, and the screw shaft 15 and the female screw member 16 are It is meshed. Screw shaft 15
By turning the handle 17 attached to
The screw shaft 15 is rotated around its axis, the female screw member 16 is moved in the axial direction of the screw shaft 15, and the position of the stopper 7 is adjusted.

The clamps 8 are provided around the device axis 4 and at positions where they do not interfere with the pusher 7 and the stopper 8. When the work fixing portion 2 has a quadrangular shape in plan view,
The pusher 7 and the stopper 8 are provided so as to face the center of the sides of the quadrangle, and the clamps 8 are provided at the corners of the quadrangle. As shown in FIG. 4, the clamp 8 has a cylinder, for example, a hydraulic cylinder 18, and the attracting direction of the hydraulic cylinder is oriented in the vertical direction. The claw 19 of the clamp 8 is pulled downward from above the work fixing portion 2 and engages with the work fixing portion 2 to clamp the work 1 to the table 3.
However, the lower end of the clamp 8 is engaged with a groove 20 formed in the table 3 and extending in the radial direction from the device center 4 slidably in the groove longitudinal direction and incapable of floating in the vertical direction, The clamp 8 does not float up from the table 3 when a tightening force is applied.

The claw 19 of the clamp 8 is a hydraulic cylinder 18
1 is at the position indicated by the broken line in the front stage of the stroke drawn downward by the cam, and is rotated by the cam engagement to the position indicated by the solid line in FIG. Then, the work 1 is fixed to the table 3. Therefore, the clamp 8 is a swing clamp in which the claw 19 swings horizontally between the positions of the broken line and the solid line in FIG. As shown in FIG. 4, each clamp 8 can be adjusted in position by a screw mechanism 21 in the horizontal direction and in the radial direction from the center 4 of the apparatus. The screw mechanism 21 has a screw shaft 22 that is rotatably connected to the table 3 side and is immovable in the axial direction, and a screw member 23 that is integrally provided on the clamp 8 side. The screw member 23 is meshed. By rotating the handle 24 attached to the screw shaft 22, the screw shaft 22 is rotated around its axis, the female screw member 23 is moved in the axial direction of the screw shaft 22, and the position of the clamp 8 is adjusted.

Next, the operation will be described. When fixing the work 1, the work 1 is unloaded near the butting of the stopper 7 by a cargo handling machine (not shown). At this time, the pusher 6 and the clamp 8 stand by at the positions of the retracted end and the raised open end, respectively. Next, the pusher 6 is moved forward to push one side of the work fixing portion 2 so that the other side of the work fixing portion 2 is abutted against the stopper 7 facing the pusher 6. Since the pushing directions of the two pushers 6 are different, the work 1 is pushed by the pusher 6
When pressed against the stopper 7 by, the center of the work 1 is automatically aligned with the center 4 of the apparatus and positioned. Since the pusher 6 pushes the work 1 by the force of the hydraulic cylinder 9, the pushing force is sufficient, and the work 1 is guided by the two stoppers 7 and positioned reliably. After the positioning is completed, the clamp 8 is lowered, the claw 19 of the clamp 8 is engaged with the work fixing portion 2, the work fixing portion 2 is pulled toward the table 3, and the work 1 is clamped on the table 3. Since the lower end of the clamp 8 is engaged with the groove 20 of the table 3, the clamp 8 does not float above the table 3 and the work 1
Firmly fix. In this state, as shown in FIG. 5, the work 1 is rotated together with the table 3 in an arbitrary posture to perform welding. As described above, the positioning and clamping of the work 1 are automatic, and the work efficiency is improved.

When the size of the work 1 changes, the positions of the pusher 6, the stopper 7 and the clamp 8 are adjusted according to the size of the work fixing portion 2. This position adjustment is performed by operating the screw mechanisms 10, 14, and 21. In this case, it is not necessary to loosen or tighten the bolts, and the position can be adjusted simply by turning the handles 13, 17, 24, so the adjustment and setup work is short.

[0015]

According to the present invention, since the work is positioned by the two sets of pushers and stoppers and fixed by the clamp, the work can be positioned and fixed automatically, and the certainty of the work position can be increased and the work can be performed. You can save time. Further, since the positions of the pushers, stoppers, and clamps can be adjusted by the screw mechanism, the setup time associated with the size change of the work can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a positioning and fixing device according to an embodiment of the present invention.

FIG. 2 is an elevational view of the layer pusher of FIG. 1 and its vicinity.

FIG. 3 is an elevational view of the stopper of the apparatus of FIG. 1 and its vicinity.

FIG. 4 is an elevational view of the clamp of the apparatus of FIG. 1 and its vicinity.

5 is a front view of the device of FIG. 1. FIG.

[Explanation of symbols]

 1 Work (for example, dice column) 2 Work fixing part (for example, diaphragm) 3 Table 4 Device center 6 Pusher 7 Stopper 8 Clamp 9 Hydraulic cylinder 10 Screw mechanism 11 Screw shaft 13 Handle 14 Screw mechanism 15 Screw shaft 17 Handle 18 Hydraulic cylinder 19 Claw 20 Groove 21 Screw Mechanism 22 Screw Shaft 24 Handle

Claims (1)

[Claims] 1. A set of pushers and stoppers arranged around the center of the apparatus, and a plurality of clamps, each pusher having a cylinder whose pushing direction is set to the horizontal direction. The pusher pushing directions are different from each other, and each pusher is positionally adjustable by a screw mechanism in the horizontal direction and in the radial direction from the center of the device, and each stopper is installed in front of the corresponding pusher pushing direction. The position of each stopper can be adjusted horizontally by a screw mechanism and in the radial direction from the center of the device.Each clamp has a cylinder whose attracting direction is vertical. Positioning and fixing are characterized in that the position can be adjusted in the horizontal direction and in the radial direction from the center of the device by a screw mechanism. Stationary device.