JPH0750113Y2 - Work support device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a work for rotating a jig table on which a work is positioned and fixed, and for indexing a work place of a work with respect to a processing spindle of a processing machine. Regarding support device.

[Conventional technology]

A cylinder mechanism is used as a means for operating a clamper for positioning and fixing a work on a jig stand facing the processing machine. As this cylinder mechanism, for example, a spring return type single-acting hydraulic cylinder is used. This single-acting hydraulic cylinder is provided with a drive pressurizing chamber that pushes the piston by hydraulic pressure, and a spring chamber that houses a spring located on the opposite side of the drive pressurizing chamber with the piston in between.
The spring chamber is formed with a breathing port for sucking and discharging air according to the operation of the piston. If the breathing opening remains open near the processing portion, cutting fluid, chips, and the like are sucked together when the breathing opening sucks air. Particularly, the liquid cutting agent is easily sucked into the spring chamber through the breathing port, and the suction of this cutting agent may cause rusting of the cylinder and malfunction. Therefore, usually, a filter is directly connected to the breathing opening, or a breathing tube is connected to the breathing opening, and the open end of the breathing tube is extended in a direction that is not affected by a cutting agent or the like.

[Problems to be solved by the device]

The above measures are effective in the case of a fixed jig base. However, in the case of an apparatus having a rotary jig base for indexing a work piece on a workpiece, the rotation of the jig base causes the cylinder mechanism to rotate and the filter or breathing tube connected to the breathing port to rotate. Therefore, in the structure in which the filter or the breathing tube is simply connected to the breathing port of the cylinder mechanism as in the above-described conventional case, the direction of the filter or the breathing tube changes in accordance with the rotation of the jig table, and the opening end of the filter or the breathing tube is changed. May be in the direction of being affected by the cutting fluid.

The present invention solves the above-mentioned conventional problems and is not affected by cutting fluid or chips even when the jig table rotates the breathing tube or filter connected to the breathing port of the cylinder mechanism. It is an object of the present invention to provide a work supporting device that can be extended to a place and can be easily replaced with a jig base.

[Means for Solving the Problems]

According to the present invention, a bracket is rotatably supported with a shaft as a fulcrum, and a jig table mounted on the bracket is provided with a clamper for positioning and fixing a work and a cylinder mechanism for operating the clamper. In the work supporting device, a breathing tube connected to the breathing port of the cylinder mechanism is piped on the jig table, and a rotary joint is provided on a supporting portion by the shaft. The breathing path extending to the above and the breathing tube are detachably connected by a pipe joint, and an external breathing tube extending outward from the rotary joint to the non-rotating side is provided.

Further, according to the present invention, in the above means, the breathing tube and the breathing path are connected by a one-touch type pipe joint so as to be detachable with one touch.

[Action]

In the above-mentioned means, by rotating the jig base, the work place of the workpiece positioned and fixed on the jig base is indexed. Further, when the cylinder mechanism on the jig base operates, suction and discharge of air from the breathing port are performed through a breathing tube provided on the jig base. Since the breathing tube provided on the jig base is further connected to the non-rotating external breathing pipe by the rotary joint provided at the center of rotation, this external breathing pipe prevents Regardless of the change, breathing is performed at a position where the outer end of the external breathing tube is not affected by cutting fluid or the like.
In addition, when removing the jig base from the bracket or installing it on the bracket,
The breathing tube and the breathing path of the jig base can be easily separated or connected by a one-touch method, for example.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a work supporting device according to the present invention, FIG. 2 is a front view including a partial cross section thereof, FIG. 3 is a III-III cross sectional view of FIG. 2, and FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2.

In FIGS. 1 and 2, reference numeral 1 is a base. A support base 2 is provided at the left end portion of the base 1, and a rotation support portion 3 is arranged above the support base 2. In the rotation support portion 3, the shaft 5 is rotatably supported horizontally by bearings 4a and 4b. Reference numerals 6a and 6b are oil seals. A flange 5a is formed at the right end of the shaft 5 in the figure, and a small diameter portion 5b protruding from the flange 5a is fitted to the bracket 7, and the bracket 7 and the flange 5a are fixed by a bolt 8. The bracket 7 is an L-shaped plate on the front surface shown in FIG. 2, and the upper surface of the horizontal portion at the right end of the bracket is an installation surface 7a for fixing a jig base 25 described later.

On the other hand, a support 11 is fixed to the right end of the base 1 in the drawing, and a horizontal shaft 12 that is coaxially opposed to the shaft 5 is rotatably provided in the support 11. Inside the support base 11, there is provided a rotating body 13 centered on the shaft 12 and rotatably supported by bearings 14a and 14b provided on the outer periphery thereof. A disc 23 is integrally fixed to one end of the rotating body 13, and a shaft 12 is provided with a flange 12 on the end face of the disc 23.
It is fixed at a. That is, the rotating body 13, the disk 23, and the shaft 12 can rotate integrally.
A worm wheel 15 is mounted on the outer periphery of the rotating body 13 so as to rotate integrally with a key 16. Support base 11
Servo motor 17 is installed in this
Is transmitted to the worm gear 19 via the reduction gear group 18. This worm gear 19 corresponds to the worm wheel 15 described above.
The worm gear 19 is driven by the rotational force of the servo motor 17, and the rotating body 13, the disk 23 and the shaft 12 are integrally driven to rotate.

The above-mentioned flange 12a is formed at the left end of the shaft 12 in the drawing, and the flange 12a is fixed to the bracket 21 by a bolt 22. The bracket 21 is fixed to the disk 23 by bolts 24. When the rotating body 13 is rotated by the driving force of the servo motor 17, the bracket 21, the disk 23, and the shaft 12 are integrally rotated. Bracket 21 is second
The front surface shown in the drawing is an L-shaped plate, and the upper surface of the horizontal portion on the left side of the drawing is an installation surface 21a for fixing a jig base 25 described later.

The jig base 25 is formed in a flat plate shape, and the bracket 7 on the left side in the figure is shown.
It is installed on the installation surface 7a and the installation surface 21a of the bracket 21 on the right side of the drawing via spacers 26a and 26b. And the bolt
The jig base 25 and the brackets 7 and 21 are fixed by 27.
In FIG. 1, reference numeral 28 indicates a bracket.
Positioning pins for positioning 7, 21 and the jig base 25. Clampers 28a to 28d for fixing the work W are attached on the jig table 25. This clamper 28a-28d
Are driven by cylinder mechanisms 30a to 30d mounted on the jig base 25. The cylinder mechanisms 30a to 30d are spring return type single-acting hydraulic cylinders. This single-acting hydraulic cylinder has a drive pressure chamber A and a spring chamber B which are divided by a piston C.
And have. A spring for returning the piston C is housed in the spring chamber B. When hydraulic pressure is supplied to the drive pressurizing chamber A, the piston C and the piston C
The clampers 28a to 28d connected to the above are driven. Further, when the hydraulic pressure is discharged, the piston C is returned by the spring in the spring chamber B. Reference numerals 32a and 32b are positioning blocks for positioning the work W.

Here, a hydraulic pressure supply path connected to the drive pressurizing chamber A of the cylinder mechanisms 30a to 30d and a breathing path for sucking and discharging air in the spring chamber B (breathing operation) will be described.

First, in the breathing path, a breathing tube 41 is provided on the back surface of the jig table 25 (the surface opposite to the surface on which the work W is fixed). The branch pipes 41a, 41b, 41c ... Branching from the breathing pipe 41 are connected to the breathing port B ₁ of the spring chamber B of each of the cylinder mechanisms 30a to 30d. A socket 42a of a one-touch type pipe joint is attached to the end of the breathing pipe 41.

On the other hand, the connecting end of the rotary joint 43 is connected to the left end in the drawing of the breathing path 44 formed at the center of rotation of the shaft 5. Further, a breathing passage 45 extending in the radial direction of the flange 5a is connected to the right end of the breathing passage 44 in the figure (see FIG. 3). Further, a pipe 46 forming a part of the breathing path is further connected to the open end of the breathing path 45. The one-touch type pipe joint plug 42b is provided at the right end of the pipe 46, which is a part of the breathing path, in the figure.
Is attached. This plug 42b and the socket 4
By fitting the 2a and the breathing tube 41 on the jig table 25 side,
The pipe 46 that serves as a respiratory path on the rotation side of the rotary joint 43 is connected.

An external breathing tube 47 is connected to the non-rotating side of the rotary joint 43. The external breathing tube 47 extends to a position away from the processing portion of the work W, and extends to the outside of a cover 49 covering the entire apparatus, for example, and the external breathing tube 47 has a filter 48 at this position.
Are connected.

On the other hand, the hydraulic pressure is supplied from the right side in the figure. An oil supply pipe 51 connected to a solenoid valve or the like for supplying hydraulic pressure is connected to a non-rotating side of a rotary joint 52 provided at the right end of the shaft 12. The rotation side of the rotary joint 52 is communicated with an oil supply passage 53 formed at the center of the shaft 12. The oil supply passage 53 communicates with an oil supply passage 54 (see FIG. 4) extending in the radial direction of the flange 12a. An oil supply pipe 55 is connected to the outer periphery of the flange 12a. As shown in FIG. 4, the oil supply pipe 55 is branched into two, for example, and each is connected to the upper end of the bracket 21. A pair of oil supply passages 56 is formed in the bracket 21, and a plug 57a of a one-touch type pipe joint is connected to the open end of the oil supply passages 56. A socket 57b is fitted in the plug 57a by a one-touch method. The socket 57b is attached to an oil supply pipe 58 provided on the back surface of the jig base 25. The pipes branched from the oil supply pipe 58 are connected to the drive pressurizing chambers A of the cylinder mechanisms 30a to 30d, respectively.

Next, the operation will be described.

When mounting the work W, the pressure in each drive pressure chamber A of the cylinder mechanisms 30a to 30d on the jig table 25 is released by switching the solenoid valve and the like, and the spring in each spring chamber B is released. The piston C is returned by the returning force. This allows
The clampers 28a to 28d are driven in the direction away from the work W. The work W is exchanged in this state. When the work W is installed on the jig table 25, switching of the solenoid valve etc.
Oil supply pipe 51, rotary joint 52, oil supply passage 53, oil supply passage 54, pipe 55, oil supply passage 56, pipe joint (plug 57a and socket 57b), and further through oil supply pipe 58, a drive pressurizing chamber of cylinder mechanisms 30a to 30d. A
Hydraulic pressure is supplied inside. When the piston C is driven by this hydraulic pressure, the work W is pressed by the positioning blocks 32a and 32b and positioned, and at the same time, the clampers 28a to 28d are pressed.
Clamped by.

Air is sucked or discharged into the spring chamber B when the piston C in the cylinder mechanisms 30a to 30d is operated. This breathing operation is performed by the breathing port B ₁ , the branch pipes 41a, 41b ..., the breathing pipe 41 of the jig base 25, the pipe joint (plug 42a and socket 42b), pipe 4
6, through the breathing path 45, the breathing path 44, the rotary joint 43, the external breathing tube 47 and the filter 48 to the outside air. The filter 48 is provided on the outer side of the cover 49, and is completely separated from the processing position of the work W, so that no cutting agent is applied thereto. Therefore, the cutting fluid is not sucked into the spring chamber B of the cylinder mechanisms 30a to 30d.

In the operation for determining the portion to be processed of the work W, the worm gear 19 is driven by the servo motor 17, and the rotating body 13 and the disk 13 are driven by the gear 15. This driving force causes the jig base 25 to rotate together with the bracket 21 and the shaft 12. By this rotation, the bracket 7 on the left side of the drawing and the shaft 5 rotate together. However, since the rotary joint 43 is connected to the shaft 5, even if the jig base 25 rotates, the filter 48
There is no twisting of the respiratory path leading to and there is no effect on the respiratory action. Similarly, since the rotary joint 52 is also provided on the hydraulic pressure supply side, there is no influence on the hydraulic pressure supply path to the cylinder mechanisms 30a to 30d provided on the rotating jig base 25. By rotating the jig table 25, the work W
The location to be processed is indexed. After that, the work W is processed by a tool (not shown) attached to the processing spindle of the processing machine.

The jig table 25 is replaceable according to the type of the work W or the like. This replacement work is performed by removing the bolt 27, but at this time, the plug 42b and the socket 42a of the pipe joint of the breathing path, and the plug 57a and the socket 57b of the pipe joint of the hydraulic pressure supply path are attached and detached, The hydraulic pressure supply paths can be easily connected or disconnected with one touch.

Further, in the embodiment shown in the drawing, breathing paths 44 and 45 are provided on the rotation side of the rotary joint 43 on the breathing side, and a pipe 46 is provided as an extension of this breathing path 45.
However, for example, the breathing path may be formed inside the bracket 7 or another member, and the plug of the pipe joint may be attached to the open end thereof.

〔effect〕

As described above, according to the present invention, since the end of the breathing path connected to the breathing port of the cylinder mechanism is extended by the external breathing tube to a position away from the processing point, cutting fluid, chips, etc. It is not sucked from the breathing port of the cylinder mechanism due to the action. Therefore, there is no risk of rusting or malfunction of the cylinder, and the durability is improved. Further, since the rotary joint is interposed in the breathing path, even if the jig table is rotated, the breathing path is not twisted and the breathing action is not affected. Further, when the jig table is replaced, the respiratory tract can be easily cut and connected by the pipe joint. If a one-touch type joint is used as the pipe joint, the hydraulic supply circuit and the respiratory tract can be disconnected more quickly.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a plan view of a work supporting device, FIG. 2 is a front view including a partial cross section,
3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a sectional view taken along the line IV- in FIG.
It is an IV sectional view. 1 ... Base, 3 ... Rotation support part, 5 ... Shaft, 7 ... Bracket, 12 ... Shaft, 15 ... Worm wheel, 17 ...
Servo motor, 19 ... Worm gear, 21 ... Bracket, 25 ... Jig stand, 28a-28d ... Clamper, 30a-30d ...
… Cylinder mechanism, A …… Drive pressure chamber, B …… Spring chamber, B ₁
... Breathing port, 41 ... Breathing pipe, 42a ... Socket as one-touch type pipe joint, 42b ... Plug as one-touch type pipe joint, 43 ... Rotating joint, 44, 45, 46 ... Rotating side breathing Road, 47 …… External breathing tube, 48 …… Filter, W ……
work.

Claims (2)

[Scope of utility model registration request] 1. A bracket is rotatably supported with a shaft as a fulcrum, and a clamper for positioning and fixing a work and a cylinder mechanism for operating the clamper are mounted on a jig base attached to the bracket. In the work supporting device described above, a breathing tube connected to the breathing port of the cylinder mechanism is piped in the jig table, and a rotary joint is provided in a supporting portion by the shaft, and a rotary joint is rotated from the rotary joint. The breathing passage extending to the side and the breathing pipe are detachably connected by a pipe joint, and an external breathing pipe extending from the rotary joint to the outside on the non-rotating side is provided. 2. The work supporting device according to claim 1, wherein the breathing path and the breathing tube are connected by a one-touch type pipe joint which can be attached and detached with one touch.