JPH0874808A - Pneumatically driven cylinder - Google Patents

Abstract

PURPOSE: To provide a pneumatically driven cylinder in which a stopper, a break device and the like are unnecessary by having a plurality of stopping positions on the pneumatically driven cylinder device itself. CONSTITUTION: A pneumatically driven cylinder is provided with a piston 5 which is slid in a cylinder by air pressure, an intake hole 1 which is provided on the circumferential wall of the cylinder and for supplying compressed air in the cylinder for sliding the piston 5, and exhaust holes 3a to 3e which are provided at prescribed intervals along axial direction on the circumferential wall of the cylinder. And also it is provided with control valves 4a to 4e which are provided on respective exhaust holes 3a to 3e and for opening and closing the exhaust holes 3a to 3e, and a control device 2 for opening/closing controlling respective control valves 4a to 4e. It is provided with stopping positions of the piston 5 in a plurality of places.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder device for driving a piston by air pressure, and more particularly to a pneumatically driven cylinder capable of setting a plurality of stop positions with simple control.

[0002]

2. Description of the Related Art A conventional pneumatically driven cylinder comprises a cylinder having an intake hole and an exhaust hole provided with a control valve, and a piston sliding in the cylinder. The compressed air is supplied into the cylinder to move the piston, and the piston is stopped by pressing the piston against the end of the cylinder.

[0003]

As described above, since the piston stop position of the conventional pneumatically driven cylinder is located at the end of the cylinder, it is necessary to provide a plurality of stop positions due to the device configuration. Had to be stopped by providing a stopper or a brake outside the cylinder.

For this reason, there has been a problem that a device using the pneumatically driven cylinder becomes large and complicated. The present invention has been made in view of the above circumstances, by eliminating the need for a stopper or a brake device by having a plurality of stop positions in the pneumatic drive cylinder device itself, downsizing of equipment using the pneumatic drive cylinder device, It is an object of the present invention to provide a pneumatic drive cylinder device that can realize simplification.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a piston main body that slides in a cylinder by air pressure and a pressurized air that is provided on a peripheral wall of the cylinder and slides the piston main body are supplied into the cylinder. An intake hole, an exhaust hole provided on the peripheral wall of the cylinder at a predetermined interval along the axial direction, a control valve provided in each of the exhaust holes to open and close the exhaust hole, and a control for controlling the opening and closing of each control valve. It has a device and has stop positions of the piston body at a plurality of positions.

Further, according to the present invention, a piston body which slides in the cylinder by air pressure, an intake hole which is provided in a peripheral wall of the cylinder and which supplies pressurized air for sliding the piston body into the cylinder, An exhaust hole that is provided on the peripheral wall of the cylinder at a position separating the piston body from the intake hole, and discharges the pressurized air to the outside of the cylinder, an air escape port formed in the piston body wall surface, and this air escape A control valve that is provided at the mouth and that opens and closes the air escape port, and a control device that controls the opening and closing of the control valve, and is characterized in that the piston body is stopped at an arbitrary position.

[0007]

According to the structure of the present invention, when a command for designating a predetermined stop position and driving the piston body of the pneumatically driven cylinder is given to the control device, the control device causes each of the plurality of exhaust holes to operate. Among the control valves provided in the above, the entire control valve is drive-controlled so that only the control valve corresponding to the designated stop position is opened and the remaining control valves are closed.

When pressurized air is supplied into the cylinder from the intake hole in this state, the piston body begins to slide in the cylinder due to the air pressure of the supplied pressurized air. Then, when the piston body passes through the exhaust hole in which the control valve is opened, the pressurized air is discharged from the exhaust hole to the outside of the cylinder. As a result, the air pressure does not act on the piston body, and the piston body stops.

This makes it possible to set the stop position of the piston body at a plurality of positions with simple control. Further, according to the configuration of the present invention, when the command for driving the piston body of the pneumatic drive cylinder by designating a predetermined stop position is given to the control device, the control device first causes the piston body wall surface to be punched. The drive control is performed so as to close the control valve of the air escape port provided.

When pressurized air is supplied into the cylinder from the intake hole in this state, the piston body begins to slide in the cylinder due to the air pressure of the supplied pressurized air. Then, when the piston body moves to the designated stop position, the drive control is performed so as to open the control valve.

When the control valve is opened, the pressurized air flows through the air escape port from the intake hole side to the exhaust hole side, and is discharged from the exhaust hole to the outside of the cylinder. As a result, the air pressure does not act on the piston body, and the piston body stops.
As a result, the stop position of the piston body can be set to an arbitrary position with simple control.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of a pneumatic drive cylinder according to the embodiment.

As shown in FIG. 1, the pneumatically driven cylinder according to the embodiment has an intake hole 1, a control device 2, and exhaust holes 3a-3.
e, control valves 4a to 4e, and a piston 5. The intake hole 1 supplies pressurized air for sliding the piston 5 into the cylinder. The control device 2 has exhaust holes 3a to 3e.
The stop position of the piston 5 is controlled by controlling the opening and closing of the control valves 4a to 4e provided in each.

The exhaust holes 3a to 3e discharge the pressurized air supplied from the intake hole 1 to the outside of the cylinder. The control valves 4a to 4e are provided in the exhaust holes 3a to 3e, respectively.
The exhaust holes 3a to 3e are opened and closed under the control of the control device 2.

The piston 5 slides in the cylinder by the pressurized air supplied from the intake hole 1. Next, the operation of the embodiment will be described with reference to FIGS.

FIG. 2 is a conceptual diagram for explaining the operation when the piston body is stopped at the minimum operating position, and FIG. 3 is a diagram for explaining the operation when the piston body is stopped at the minimum operating position. It is a conceptual diagram.

As shown in FIG. 2, when the piston 5 is stopped at the minimum operating position, the control device 2 uses the plurality of exhaust holes 3
Among the control valves 4a to 4e provided in the a to 3e, only the control valve 4e provided in the minimum operating position is opened and the remaining control valves 4a to 4d are closed.
4e drive-control the whole.

When pressurized air is supplied into the cylinder from the intake hole 1 in this state, the piston 5 starts sliding in the cylinder by the air pressure of the supplied pressurized air. Then, when this piston 5 passes through the air escape port 3e in which the control valve 4e is opened, the pressurized air is discharged from the exhaust hole 3e to the outside of the cylinder. As a result, air pressure does not act on the piston 5, so that the piston 5 stops.

As a result, the piston 5 can be stopped at the minimum operating position. Further, as shown in FIG. 3, when the piston 5 is stopped at the maximum operating position, the control device 2
Among the control valves 4a to 4e respectively provided in the plurality of exhaust holes 3a to 3e, only the control valve 4a provided at the maximum operating position is opened and the remaining control valves 4b to 4e are closed. The entire drive control of 4a to 4e is performed.

When pressurized air is supplied into the cylinder from the intake hole 1 in this state, the piston 5 starts sliding in the cylinder due to the air pressure of the supplied pressurized air. The piston 5 is connected to the exhaust hole 3 in which the control valve 4a is opened.
After passing through a, the pressurized air is discharged from the exhaust hole 3a to the outside of the cylinder. As a result, air pressure does not act on the piston 5, so that the piston 5 stops.

As a result, the piston 5 can be stopped at the maximum operating position. As described above, the control valves 4a-4
By controlling the driving of e, it is possible to set the stop position of the piston 5 at a plurality of positions.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a schematic configuration diagram of the pneumatically driven cylinder according to the embodiment. As shown in FIG. 4, the pneumatically driven cylinder according to the embodiment includes an intake hole 11, an air escape port 12, a control valve 13, an exhaust hole 14, a piston 15, and a control device 16.

The intake hole 11 supplies pressurized air for sliding the piston 15 into the cylinder. Air escape port 12
Causes the pressurized air supplied from the intake hole 1 to flow from the intake hole 1 side to the exhaust hole 14 side. Then, the control valve 13 opens and closes the air escape port 12 under the control of the control device 16.

The exhaust hole 14 discharges the pressurized air supplied from the intake hole 11 to the outside of the cylinder. Also, the piston 5
Slides in the cylinder by the pressurized air supplied from the intake hole 11.

The control device 16 controls the stop position of the piston 15 by controlling the opening / closing of the control valve 13. Next, the operation of the embodiment will be described with reference to FIGS.

FIGS. 5 and 6 are conceptual diagrams for explaining the operation of the embodiment. As shown in FIG. 5, the control device 1
6 is the air escape port 12 provided in the piston 15 first.
The control valve 13 is controlled to be closed.

When pressurized air is supplied into the cylinder from the intake hole 11 in this state, the piston 5 begins to slide in the cylinder due to the air pressure of the supplied pressurized air. Then, when the piston 5 moves to a predetermined position, drive control is performed so as to open the control valve 13 as shown in FIG.

When the control valve 13 is opened, the pressurized air flows through the air escape port 12 from the intake hole 11 side to the exhaust hole 14 side, and is discharged from the exhaust hole 14 to the outside of the cylinder. As a result, air pressure does not act on the piston 15, so that the piston 15 stops.

As a result, the stop position of the piston 5 can be set to an arbitrary position by simple control. In the above embodiment, the pneumatic drive cylinder that drives the piston by air pressure has been described, but the present invention is not limited to this, and can be applied to hydraulic equipment such as a hydraulic drive cylinder.

[0030]

As described above in detail, according to the configuration of the present invention, the pneumatic drive cylinder device itself has a plurality of stop positions or a control function of stopping the piston at any stop position. By having it, the stopper and the brake device are unnecessary, and it becomes possible to realize the downsizing and simplification of the device using the pneumatic drive cylinder device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a pneumatic drive cylinder according to a first embodiment.

FIG. 2 is a conceptual diagram for explaining an operation when the piston body according to the first embodiment is stopped at the minimum operation position.

FIG. 3 is a conceptual diagram for explaining the operation when the piston body according to the first embodiment is stopped at the minimum operation position.

FIG. 4 is a schematic configuration diagram of a pneumatic drive cylinder according to a second embodiment.

FIG. 5 is a conceptual diagram for explaining the operation of the second embodiment.

FIG. 6 is a conceptual diagram for explaining the operation of the second embodiment.

[Explanation of symbols]

1 ... Intake hole, 2 ... Control device, 3a, 3b, 3c, 3d,
3e ... Exhaust hole, 4a, 4b, 4c, 4d, 4e ... Control valve, 5 ... Piston, 11 ... Intake hole, 12 ... Air escape port, 13 ... Control valve, 14 ... Exhaust hole, 15 ... Piston, 1
6 ... Control device.

Claims (2)

[Claims] 1. A piston main body that slides in a cylinder by air pressure, an intake hole provided in a peripheral wall of the cylinder for supplying pressurized air for sliding the piston main body into the cylinder, and a peripheral wall of the cylinder. An exhaust hole provided at a predetermined interval along the axial direction, control valves provided in each of the exhaust holes to open and close the exhaust hole, and a control device for controlling opening and closing of each of the control valves. Pneumatic drive cylinder characterized by having multiple stop positions. 2. A piston body which slides in the cylinder by air pressure, an intake hole which is provided in a peripheral wall of the cylinder and supplies pressurized air for sliding the piston body into the cylinder, and a peripheral wall of the cylinder. Is provided at a position separating the piston main body from the intake hole, is provided with an exhaust hole for discharging the pressurized air to the outside of the cylinder, an air escape port formed in the wall surface of the piston main body, and this air escape port. A pneumatic drive cylinder comprising a control valve for opening and closing an air escape port and a control device for controlling the opening and closing of the control valve, and stopping the piston body at an arbitrary position.