JPH1073104A - Cylinder controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the stopping of a piston rod in-between by arranging an inner partition plate between a center shaft of an outer cylinder and an inner wall of the outer cylinder, arranging first and second pipings on both sides of the inner partition plate and rotating a vane around the center shaft of the outer cylinder while being slid against the inner wall of the outer cylinder. SOLUTION: A shaft is arranged on a center of an outer cylinder 5, while an inner partition plate 4 is arranged between the shaft and an inner wall of the outer cylinder 5. A first piping 2 and a second piping 3 are arranged on both side of the inner partition plate 4. A seal is set in the outer cylinder 5 around the shaft of a motor 6 for preventing oil leakage. After charging oil, the outer cylinder 5 is covered with a cover 9. The motor 6 is then driven, to rotate vane 8 slidingly clockwise or counterclockwise. A piston rod 1a is thus operated in right and left directions. The stopping of the piston rod 1a in-between is facilitated, accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cylinder control device,
In particular, it relates to a cylinder control device that can be stopped halfway.

[0002]

2. Description of the Related Art A conventional technique will be described in detail with reference to the drawings.

FIG. 3 is a block diagram showing a first conventional example. The cylinder control device shown in FIG.
The compressed air from 3 is switched by the valve 14 and the piping 16
Alternatively, the piston rod 1a of the cylinder 1 is moved to the left and right by supplying it to the pipe 17. By switching the valve 14, the compressed air in the cylinder 1 is released from the silencer 1
It is released into the atmosphere via 5.

FIG. 3 is a side view showing a second conventional example. By transmitting the rotation of the motor 61 to the ball screw 20 via the joint 18, the moving stage 19 attached to the ball screw 20 can be moved right and left and stopped at an arbitrary position.

[0005]

In the above-mentioned prior art, since the cylinder is controlled by switching the valve, the cylinder cannot be stopped halfway.
Also, since compressed air is released into the atmosphere with each operation,
The compressor must always supply air. Also,
The technology using a ball screw has the disadvantage that it is expensive and takes up space due to its complicated mechanism.

[0006]

According to a first aspect of the present invention, there is provided a cylinder control device including an outer cylinder, a shaft provided at the center of the outer cylinder, and an internal partition provided between the shaft and an inner wall of the outer cylinder. A plate, first and second ports for attaching first and second pipes provided on the left and right of the internal partition plate, and sliding on the inner wall of the outer cylinder about the axis. It comprises a rotating valve and a motor for rotating the valve.

According to a second aspect of the present invention, in the cylinder control device according to the first aspect, the motor is a servomotor.

According to a third aspect of the present invention, in the cylinder control device according to the first aspect, the motor is a pulse motor.

According to a fourth aspect of the present invention, in the cylinder control device according to the first aspect, oil is sealed in the outer cylinder.

According to a fifth aspect of the present invention, in the cylinder control device according to the first aspect, air is sealed in the outer cylinder.

According to a sixth aspect of the present invention, in the cylinder control device according to the first aspect, a seal for preventing oil leakage is disposed on a shaft of the motor.

[0012]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially cutaway side view showing a first embodiment of the present invention. The cylinder control device shown in FIG. 1 includes an outer cylinder 5, a shaft provided at the center of the outer cylinder 5, an internal partition plate 4 provided between the shaft and the inner wall of the outer cylinder 5, First for attaching pipes 3 and 4 provided on the left and right
, A second port, a valve 8 that rotates while sliding on the inner wall of the outer cylinder 5 about the axis, and a motor 6 that rotates the valve 8
It is comprised including.

An oil 7 is sealed in the outer cylinder 5. Instead of using the liquid of the oil 7, a gas such as air may be sealed. As the motor 6, a servomotor or a pulse motor is used.

FIG. 2 is a sectional view taken along line AA of FIG. After the seals 11 and 12 are put around the shaft of the motor 6 to prevent oil from leaking and filled with oil, the outer cylinder 5 is closed with the lid 9.

In FIG. 1, when the motor 6 is driven to rotate the valve 8 clockwise, the oil 7 is pushed out from the pipe 3 and moves the piston rod 1a to the right. Along with this, the oil 7 flows into the outer cylinder 5 from the pipe 2. At the position where the motor stops, the piston rod 1a also stops,
If the motor 6 is driven counterclockwise, the piston rod 1
a moves to the left.

[0017]

According to the cylinder control device of the present invention, the liquid (or gas) in the closed loop is moved by a valve driven by a motor, so that the piston rod can be stopped halfway, and compared with a device using a ball screw. Thus, there is an effect that the space can be reduced.

[0018]

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a block diagram showing a first conventional example.

FIG. 4 is a side view showing a second conventional example.

[Explanation of symbols]

 1 Cylinder 2 Piping 3 Piping 4 Internal partition plate 5 Outer cylinder 6 Motor 7 Oil 8 Valve 9 Lid

Claims (6)

[Claims] An outer cylinder, a shaft provided at the center of the outer cylinder,
An internal partition plate provided between the shaft and the inner wall of the outer cylinder; a first pipe provided on the left and right of the internal partition plate;
First and second ports for attaching the pipes, a valve that rotates while sliding on the inner wall of the outer cylinder about the axis, and a motor that rotates the valve. Cylinder control device. 2. The cylinder control device according to claim 1, wherein said motor is a servomotor. 3. The cylinder control device according to claim 1, wherein said motor is a pulse motor. 4. The cylinder control device according to claim 1, wherein oil is sealed in the outer cylinder. 5. The cylinder control device according to claim 1, wherein air is sealed in the outer cylinder. 6. The cylinder control device according to claim 1, wherein a seal for preventing oil leakage is provided on a shaft of the motor.