JPH07328880A - Work support device - Google Patents

Abstract

PURPOSE:To reduce a storage place of a work support device or a work replacing workshop by replacing a work on a work line in a short time, and effectively using a dead space. CONSTITUTION:A work support device has a base plate 1 and a cylindrical block 2 erected on this, and a work clamp 4 supported with an outside surface 3 of this block 2 is composed of a hydraulic work clamp, and an oil tank 12, an oil pump 13 and directional control valves 14 are arranged in a hollow part 11 of the block 2, and the work clamp 4 is connected to the oil tank 12 and the oil pump 13 by the directional control valves 14 in a switching system, and a work can be replaced in a shorter time than the process time for intermittent operation of a work line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work supporting device, and more particularly, to changing a work on a processing line in a short time and effectively utilizing a dead space of the work supporting device to store a work supporting device in a storage space. The present invention relates to a work supporting device capable of reducing a work exchange work space.

[0002]

2. Description of the Related Art In recent years, with the automation of processing lines, for example, as shown in the plan view of FIG. 7, a large number of pallets 102 are arranged at regular intervals on a constant circulation path 101 and each pallet is arranged. The work support device 103 supporting the work is placed on the pallet 102, the pallets 102 are intermittently circulated, and the pallet 102 stops at the processing stage where the pallet 102 is circulated.
A machining line is used to machine the workpiece by using a cutting machine and a grinding machine facing 101.

The work supporting device 103 has a base plate and a cylindrical block erected on the base plate.
After the work is supported on the outer surface of the block via the work clamp outside the processing line, the work is carried into the production line together with the work supporting device 103 by the loader 104. Further, the work supporting device 103 supporting the work
Is rotated around the vertical axis on the pallet 102 as necessary while circulating the work processing line, and each work fixed to the plurality of outer surfaces of the block is processed.

After a series of machining of each work is completed by circulating the work machining line, the work support device 103 is taken out from the work line by the unloader 105, and the work already processed outside the work line is removed from the work support device 103. There is. By the way, as a work clamp used in this type of work supporting device 103, a work support that is moved in and out of the work processing line, moves on the work processing line, and rotates on the pallet 102 as necessary. Since hydraulic piping to the equipment is difficult, hydraulic clamps are not used, and the base fixed to the block with bolts, nuts, etc., the clamp claws supported by this base, and the clamp claws in the tightening direction. A screw-type clamp with a screw for advancing and retracting is used.

As the clamp claw, the tip of which is provided so as to be able to advance and retreat in a direction perpendicular to the outer surface of the block,
Some of them are provided so that their tips can move back and forth in parallel with the outer side surface of the block, and some of them are provided so that their tips can move forward and backward in a direction inclined with respect to the outer side surface of the block. The work clamp, in which the tip of the clamp claw can be moved forward and backward in a direction perpendicular to the outer surface of the block, is inserted into the clamp claw, and the screw that is screwed into the block or the base is tightened to tighten the tip of the clamp claw and the block. The work is clamped and fixed between the outer surface and the outer surface.

Further, in the work clamp in which the tip of the clamp claw is provided so as to be able to advance and retreat in parallel to the outer side surface of the block, the side surface of the work is blocked by the clamp claw by tightening the screw inserted in the base body so as to be able to advance and retract. Fix the work by pressing it against the other work clamp fixed to or the reference block. Further, in a clamp in which the tip of the clamp claw is provided so as to advance and retreat in a direction inclined with respect to the outer side surface of the block, the work is placed outside the block by tightening the screw that is inserted into the base body so as to be able to advance and retract. Fix the work by pressing it against the side surface and other work clamps fixed to the block or the reference block.

[0007]

Therefore, in the conventional work supporting device, when exchanging a processed work and an unprocessed work, the screw for fastening the clamp claw is loosened, the processed work is removed, and the unprocessed work is removed. Since it is necessary to re-tighten the screw while accurately positioning the work, the work replacement time may be long.

Further, in particular, when the takt time of the machining line, that is, the time when the pallet 102 is stopped is shorter than the work replacement time, the time loss in the machining line is eliminated in order to eliminate the time loss. It is necessary to prepare a larger number of work supporting devices 103 than the work supporting devices 103 that can be mounted, and to perform work replacement of a plurality of work supporting devices 103 in parallel at the same time outside the machining line, and store a large number of work supporting devices 103. Therefore, it is necessary to provide a large storage space for the work and a large work space for the work exchange work.

In view of the above circumstances, the present invention makes it possible to replace a work on a processing line in a short time, and moreover, effectively utilize the dead space of the work support device to store the work support device or replace the work. It is an object of the present invention to solve the technical problem of providing a work supporting device capable of reducing the work space.

[0010]

The present invention has a base plate and a cylindrical block erected on the base plate,
In order to achieve the above object, the following technical means are taken on the premise of a work supporting device that supports a work on the outer surface of the block via a work clamp.

That is, the work clamp is composed of a hydraulic work clamp supported on the outer surface of the block, and an oil tank for storing the working oil in the hollow portion of the block and the working oil from the oil tank An oil pump that sucks and discharges at a predetermined pressure, and a directional control valve that controls the supply of hydraulic oil discharged from the oil pump to the work clamp and the discharge of hydraulic oil from the work lamp to the oil tank. It is a work supporting device characterized by being arranged.

[0012]

[Operation] Suction of hydraulic oil from the oil tank by the oil pump,
By increasing the pressure to a predetermined pressure and discharging it, and supplying this increased pressure to the work clamp with the direction control valve, the work clamp can be momentarily tightened to fix the work to the work support device. When the valve is switched and the hydraulic oil in the work clamp is discharged to the oil tank, the work clamp is momentarily loosened and the work can be removed from the work support device.

Further, this makes it possible to make the work replacement time shorter than the tact time of the processing line and to perform the work replacement on the circulation path of the pallet of the processing line, and to store the work supporting device outside the processing line. It is not necessary to provide a place for the work, and the place for the work replacement work can be reduced to a narrow range near the machining line.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A work supporting device according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings, but the present invention is not limited to this embodiment, and is described in the present specification. The present invention covers the entire range of the technical idea truly intended by the present invention, which will be apparent from the entire description of the accompanying drawings.

As shown in the vertical side view of FIG. 1 and the plan view of FIG. 2, a work supporting device according to an embodiment of the present invention is
It has a base plate 1 and a rectangular cylindrical block 2 which is erected on the base plate 1, and supports a work 5 on each outer surface 3 of the block 2 via a work clamp 4. As shown in FIG. 2, the base plate 1 is formed in a square shape with four corners chamfered in a plan view, the block 2 is concentric with the base plate 1, and each outer surface 3 is parallel to four sides of the base plate 1. Will be arranged.

The work clamp 4 is shown in FIGS.
Although only one is shown in FIG. 1, the number of works required to fix the work 5 to the outer side surface 3 to which the work 5 is attached is attached. This work clamp 4 is of a hydraulic type, and as shown in FIG. 1, a base body 6 fixed to the outer surface of the block 2 and a clamp supported by the base body 6 via a support shaft 7 so that the seesaw can swing. It has a claw 8 and a hydraulic cylinder 9 assembled to the base body 6, and the base body 6 is fixed to the block 2 by, for example, bolts. When hydraulic oil is supplied to the hydraulic cylinder 9, the piston rod 10 advances to drive the base end of the clamp pawl 8 to the outside.

In the hollow portion 11 of the block 2, an oil tank 12 for storing hydraulic oil, an oil pump 13 for sucking the hydraulic oil from the oil tank 12 and discharging it at a predetermined pressure, and the oil pump
A directional control valve 14 is arranged to control the supply of the working oil discharged from the work clamp 4 to the work clamp 4 and the discharge of the working oil from the work lamp 4 to the oil tank 12. The oil pump 13 is arranged in the center of the upper side of the oil tank 12 as shown in FIG.
As shown in the air / hydraulic circuit diagram in Fig. 2, driven by the pressurized air supplied from the external pressurized air supply source, the working oil in the oil tank 12 is sucked through the filter 15 and pressurized to a predetermined pressure. It is composed of an air-driven pressure booster (booster pump) that discharges the air. The oil pump 13 is configured to automatically stop when the internal pressure of the load circuit connected to the discharge port reaches a predetermined value and restart automatically when the internal pressure of the load circuit falls below the predetermined value. ing.

The number of the directional control valve 14 may be one, but in this embodiment, in order to control the operation of the work clamp 4 for each side surface of the block 2, as shown in FIG. Four directional control valves 14 are provided around the oil pump 13 on the upper side of the oil tank 12. Each directional control valve 14 is switched between two positions by electromagnetic operation or pneumatic operation, and as shown in FIG. 3, a supply passage 16 for communicating the work clamp 4 with the discharge port of the oil pump 13 and a return oil passage for the work clamp 4. 18
And a return passage 17 communicating with the oil tank 12 via
A check valve 19 for sealing the working oil supplied to the work clamp 4 in the work clamp 4 is interposed in the supply passage 16.

When a pressurized air source such as an external factory pressurized air pipe is connected to the oil pump 13 and the hydraulic pump 13 is operated, the working oil in the oil tank 12 is sucked by the oil pump 13, The oil is discharged from the pump 13 at a predetermined pressure, and when the discharge pressure reaches a predetermined value, the oil pump 13 automatically stops. Here, when the direction control valve 14 is switched to a position where the work clamp 4 is connected to the oil tank 12, the cylinder 9 of the work clamp 4 is momentarily depressurized, and the clamp claw 8 is manually pressed against the hydraulic cylinder 9. The tip thereof is swung in a direction away from the outer side surface 3 of the block 2, and the tip end of the clamp claw 8 and the outer side surface 3 of the block 2 are widened to sandwich the machined work 5 and unprocessed work piece 5 sandwiched therebetween. The work 5 can be replaced.

After positioning the work 5 at a predetermined position,
When the position of the direction control valve 14 is switched and the work clamp 4 is connected to the oil pump 13, the hydraulic oil discharged from the oil pump 13 is instantaneously supplied to the cylinder 9 of the work clamp 4 and driven by the piston rod 10. The tip of the clamp claw 8 presses the work 5 against the outer surface 3 of the block 2 to fix it.

Therefore, the work can be replaced in a significantly shorter time than the conventional screw type work clamp for loosening or tightening the screw, for example, a time shorter than the takt time of the work processing line. as a result,
Even if the work is exchanged on the processing line, the takt time of the processing line is not likely to be extended, and it is sufficient to provide the same number of work supporting devices as the number of pallets on the processing line. As a result, it is not necessary to provide a place for storing the work supporting device outside the machining line, and it is possible to reduce the size of the work place for the work exchanging work to the size required for exchanging the work of one work supporting device.

Further, even if the work is exchanged outside the machining line, it is not necessary to perform the work exchange of a large number of work supporting devices in parallel, and a work space having a space required for the work exchanging work of one work supporting device is provided. Since it is sufficient to provide it, the work space for work replacement can be reduced. Moreover, since the oil tank 12, the oil pump 13 and the directional control valve 14 are arranged in the hollow portion 11 in the block 2 which was a dead space in the past, the dead space can be increased without increasing the space occupied by the work supporting device. Can be effectively used, which is more advantageous in saving space.

In the work supporting device according to another embodiment of the present invention shown in the side view of FIG. 4 and the plan view of FIG. 5, two oil pumps 13 and one directional control valve 14 are provided. Also, on the side surface of the upper cover plate 20 of the oil tank 12, an oil inlet 21 and an opening valve
22 and the breather 23 are screwed in, and an air supply port 24 to which a pressurized air supply source is connected and an oil discharge port 25 are opened.

As shown in the air / hydraulic circuit diagrams of FIGS. 4, 5 and 6, the air supply port 24 is provided on the upper cover plate of the oil tank 12.
Each oil pump 13 through the branch flow passage 26 arranged above 20
The discharge port of each oil pump 13 is connected to the direction control valve 14 via a collecting channel formed in the upper cover plate 20, and the work clamp 4 is controlled in direction via the oil discharge port 25. valve
Connected to 14.

Since the other construction, operation and effect of this embodiment are the same as those of the above-mentioned one embodiment, detailed description thereof will be omitted to avoid duplication.

[0026]

As described above, in the work supporting device according to the present invention, the work clamp is composed of a hydraulic work clamp supported on the outer surface of the block, and an oil tank for storing hydraulic oil is provided. , An oil pump that sucks the working oil from this oil tank and discharges it at a predetermined pressure, and supplies the working oil discharged from this oil pump to the work clamp and discharges the working oil from the work lamp to the oil tank. Since it is equipped with a directional control valve that controls the workpiece, the workpiece clamp can be momentarily activated or deactivated by switching the directional control valve, which can significantly shorten the workpiece replacement time. it can.

Further, as a result, if the work time for exchanging the work is shorter than the tact time of the machining line, the work can be exchanged on the machining line, and an extra storage place for the work supporting device can be eliminated. At the same time, the area required for the work exchanging work can be reduced to the area required for the work exchanging work of one work supporting device. Further, since the oil tank, the oil pump, and the directional control valve are arranged in the hollow portion of the block, the dead space can be effectively used without increasing the space occupied by the work supporting device, and the space can be omitted. It will be more advantageous in the above.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment of the present invention.

FIG. 2 is a plan view of an embodiment of the present invention.

FIG. 3 is a pneumatic / hydraulic circuit diagram of an embodiment of the present invention.

FIG. 4 is a side view of an essential part of another embodiment of the present invention.

FIG. 5 is a plan view of an essential part of another embodiment of the present invention.

FIG. 6 is an air / hydraulic circuit diagram of another embodiment of the present invention.

FIG. 7 is a plan view of a general work processing line.

[Explanation of symbols]

 1 ... Base plate 2 ... Block 3 ... Outer surface 4 ... Work clamp 11 ... Hollow part 12 ... Oil tank 13 ... Oil pump 14 ... Direction control valve 20 ... Pneumatic switching valve

Claims (1)

[Claims] 1. A work supporting device having a base plate and a cylindrical block erected on the base plate, and supporting a work on an outer surface of the block via a work clamp, wherein An oil tank that is composed of a hydraulic work clamp that is supported on the outer surface of the block, and that stores hydraulic oil in the hollow portion of the block, and oil that sucks the hydraulic oil from this oil tank and discharges it at a specified pressure. A work supporting device comprising a pump and a directional control valve for controlling the supply of the hydraulic oil discharged from the oil pump to the work clamp and the discharge of the hydraulic oil from the work lamp to the oil tank. .