JPH0538645A - Work fixing mechanism of work rotating device - Google Patents

Abstract

PURPOSE:To shorten the time for work fixation in a work rotating device and make the fastening force uniform. CONSTITUTION:With a holding member 17, a work 7 is clamped onto a work mounting table 11a to be driven for rotating, and an air cylinder device 11 to put this holding member 17 into clamping motion with the pneumatic pressure is installed as rotatable in a single piece with the work mounting table 11a. Air is supplied into a cylinder vessel 15 using an air supply pad 21 mounted removably through a check valve 22 installed at the air cylinder device 11, and fixation is made with the holding member 17 secured by pin 18 to a shaft 16 coupled with a piston 14. This allows shortening of the time for installation works, making the fastening force uniform, and performing processing and adjustment with precision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work fixing mechanism of a work rotation driving device for processing and adjusting a work.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a work fixing mechanism of a conventional work rotation driving device used for assembling and adjusting a recording / reproducing head such as a VTR. 3 is an overall view of the work rotation drive device, and FIG. 4 is a cross-sectional view of a work fixing mechanism portion of the work rotation drive device. The work rotation drive device 1 includes a rotation mechanism unit 3 that is rotated by a rotation drive motor 2.
And a work fixing part 4 attached to the rotation mechanism part 3. The work fixing part 4 is provided with a receiving seat 5 on which the work 7 is placed and a center pin 6 for guiding the work 7. The receiving seat 5 and the center pin 6 are fixed to the work fixing portion 4 by screws. When fixing the work 7 to the work fixing part 4, place the work 7 on the seat 5 and cover it with the pressing cap 8, and further cover the pressing cap 8 with the knob 9. Next, by tightening the screw 9a of the knob 9 into the screw hole 6a of the center pin 6,
Fix the work on the work fixing part. Then, the fixed work 7 is finished, or a plurality of heads 10 are attached by a head fixing chuck (not shown), and the radial head protrusion amount, the head-to-head positional relationship, the tape and the head The contact angle posture was adjusted.

[0003]

In the conventional work fixing mechanism, since the work 7 is held by the screw-in type knob 9 and the pressing cap 8, the screw 9a of the knob 9 is pushed to the center pin.
It takes time to tighten to 6. Further, since the operator tightens the knob 9 due to individual differences, the tightening force varies, and if it is tightened too much, the workpiece 7 may be processed and adjusted while being distorted, resulting in poor accuracy. there were. The present invention is intended to fix a work at a constant pressure and in a short time.

[0004]

SUMMARY OF THE INVENTION According to the present invention, an air cylinder device for clamping a work holding member by air pressure is provided rotatably integrally with a work mount, and an openable / closable valve provided in the air cylinder device is provided. The air supply means is detachably connected to the air cylinder device through the above.

[0005]

The technical means described above operates as follows.
Since the air supply means is detachably connected to the air cylinder device through the openable / closable valve provided in the air cylinder device that rotates integrally with the work mount, the work can be fixed by the air pressure even on the rotary drive device. Therefore, the installation work time can be shortened, the tightening force can be made uniform, and highly accurate processing and adjustment can be performed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a work rotation driving device for assembling / adjusting a recording / reproducing head such as a VTR will be described below with reference to the drawings. FIG. 1 is a view showing a fixed state of the work, and FIG. 2 is a view showing a state in which the work is not fixed. Referring to these drawings, a work mount 11a incorporating an air cylinder device 11 is fixed on the rotation mechanism section 3 of the work rotation drive device. The work mount 11a is provided with a receiving seat 12 for mounting the work 7 and the work.
And a sleeve 13 for guiding 7. The air cylinder device 11 includes a cylinder container 15 containing a piston 14 and a shaft 16 extending through an end 15a of the cylinder container 15 and connecting the piston 14 and the pressing member 17.
Although the workpiece mounting base 11a including the workpiece mounting base 11a may be provided on the rotating mechanism portion 3 separately from the air cylinder device 11, in this embodiment, the workpiece mounting base 11a is disposed on the end portion 15a of the cylinder container 15. Since it is provided, the entire device is compact, and rotational runout is less likely to occur.

The rotation of the work 7 will be described with reference to FIG. When the rotation mechanism unit 3 of the work rotation drive device is stopped, the work 7 is placed on the receiving seat 12, the pressing member 17 is covered, and the pressing member 17 is fixed to the shaft 16 by the pin 18.
Then, the air supply pad 21 is moved forward and brought into close contact with the check valve 22, and air is supplied to the upper cylinder chamber in the cylinder container 15.
Supply to 15b. As the air pressure in the upper cylinder chamber 15b rises, the piston 14 lowers, the shaft 16 and the pressing member 17 also lower, and the work 7 is pressed against the receiving seat 12 and fixed. When the air pressure in the upper cylinder chamber 15b reaches a predetermined level, the air supply is stopped, the air supply pad 21 is retracted, and the work is done by disconnecting it from the check valve 22.
7 Fixing work is completed. The check valve 22 is for supplying air only in one direction, and prevents the air pressure in the upper cylinder chamber 15b from dropping even when the air supply pad 21 is disconnected. Therefore, the work 7 remains fixed even if the rotation mechanism unit 3 rotates. After that, place multiple heads 10 on the work 7 and attach them with a head fixing chuck (not shown), and adjust the radial head protrusion amount, head-to-head positional relationship, and tape-head contact angle posture. Do.

Next, the process of removing the work 7 will be described based on the surface. The rotation mechanism section 3 is stopped, and the mechanical air valve 23 for air exhaust provided in the air cylinder device 11 is operated by the air exhaust pin 24 to send the air in the upper cylinder chamber 15b into the lower cylinder chamber 15c. As the air pressure in the upper cylinder chamber 15b decreases, the spring
20 pushes up the piston 14, and the interlocking pressing member 17
Lift up. By removing the pin 18 of the pressing member 17 from the shaft 16, the pressing member 17 and the work 7 can be removed. It should be noted that the mechanical air valve 23 may discharge the air in the upper cylinder chamber 15b to the outside without sending it to the lower cylinder chamber 15c. At that time, the spring 20 alone pushes up the piston 14. In the above embodiment, the check valve 22 and the mechanical air valve 23 individually supply and exhaust air.However, the supply / exhaust valve capable of switching between air supply and exhaust is replaced by a check valve. However, the mechanical air valve 23 may be omitted.

[0009]

As described above, according to the present invention, in the work rotation drive device, when the work is fixed to the work mount which is rotationally driven, the clamp fixation using the air pressure can be performed. The installation time is short, the work is easy, and the work can be pressed down with a constant pressure, and the work can be processed and adjusted with high accuracy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a fixed state of a work according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating removal of the work of FIG.

FIG. 3 is an overall view of a work rotation drive device.

FIG. 4 is a cross-sectional view of a conventional work fixed state.

[Explanation of symbols]

 3 Rotating mechanism 7 Work 11 Air cylinder device 11a Work mount 14 Piston 15 Cylinder container 15a End 15b Upper cylinder chamber 15c Lower cylinder chamber 16 Shaft 17 Holding member 21 Air supply pad 22 Check valve 23 Mechanical air valve 24 Air exhaust pin

Claims (3)

[Claims] 1. A work fixing mechanism for a work rotation drive device, comprising: a work mounting base that is rotationally driven; and a holding member that rotates integrally with the work mounting base to clamp the work on the work mounting base. An air cylinder device that clamps the pressing member by air pressure is rotatably provided integrally with the work mount, and the air supply means can be attached to and detached from the air cylinder device via an openable / closable valve provided in the air cylinder device A work fixing mechanism for a work rotation drive device, which is characterized in that 2. The work fixing device for a work rotation drive device according to claim 1, wherein the valve is a check valve, and the air cylinder device is further provided with an opening / closing valve for discharging air. mechanism. 3. The air cylinder device comprises a cylinder container containing a piston, and a shaft extending through an end of the cylinder container to connect the piston and the pressing member. The work fixing mechanism of the work rotation driving device according to claim 1, wherein the work fixing mechanism is provided on the end portion of the cylinder container.