JPH023415Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a control device for a table that supports and moves a workpiece or a table that supports and moves a tool in various automatic machines. It is configured so that it will not move even if an external force or vibration is applied at the predetermined stationary position.

[Conventional technology]

When controlling the movement of a work table, etc. using an air cylinder, if an external force or vibration is applied at a fixed stationary position, unlike hydraulic pressure, it may move due to the compressibility of air, making accurate machining of the work, etc. impossible. It was hot.

For this reason, conventionally, when a high load is applied to a work table or the like, a temporary fixing device for the work table or the like is separately provided, which inevitably increases the complexity and cost of the device.

[Problem that the invention attempts to solve]

The present invention is configured so that the work table, etc. does not move even if an external force or vibration is applied after the work table, etc. is moved to a predetermined stationary position on the left and right. This is done using an air cylinder.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is provided with air cylinders facing each other, whose piston rods or tubes are integrated, one of which is a fixed side and the other is a movable side, and a work table etc. is provided on the movable side. An on-off valve is provided in each of the pipes provided from the rod cover side or the head cover side compartment of both air cylinders, the pipes are collected together as an operating pressure pipe, and a switching valve is provided in each of the pipes from the opposite side compartments, It is configured so that it can be connected to or disconnected from the operating pressure piping, and further, when the operation pressure piping is disconnected, the air in the opposite compartment can be exhausted.

[Operation] According to the present invention, when the switching valve is operated, air at a predetermined operating pressure is supplied to one of the rod cover side compartments or the head cover side compartments of the air cylinder in which the piston rods or tubes are integrally provided facing each other. A predetermined amount of air is evacuated from the other compartment to operate the air cylinder.

At that time, that is, while the air cylinder is operating, the on-off valves provided in the piping from each compartment and the opposite compartment are opened and connected to the operating pressure piping to prevent interference with the operation of the air cylinder. There's nothing to do.

Next, in order to stop the air cylinder at a predetermined position, the switching valve is switched to stop supplying air at a predetermined operating pressure from one compartment and discharging a predetermined amount of air from the other compartment, while at the same time The on-off valves provided in the respective pipes from the side compartments are closed. As a result, the operation pressure piping and the compartment on the opposite side are completely shut off, the operating pressure air is confined in the compartment on the opposite side, and the piston and piston rod are not moved.

〔Example〕

FIG. 1 shows an example in which the rod covers 1 and 2 of air cylinders A and B are placed opposite each other.

That is, the piston rods 3 and 4 of air cylinders A and B are connected, and a table 5 is provided on the connected piston rods 3 and 4.

However, it is also possible to make the head covers 6 and 7 of the air cylinders A and B face each other, to connect the piston rods protruding on both sides with a separate member as appropriate, and to provide a table in the connecting member.

Although not shown in FIG. 1, the tubes 8 and 9 of the air cylinders A and B are fixed to the frame (not shown).

Therefore, the piston rods 3 and 4 are movable, and a table 5 is provided.

In the figure, 10 and 11 are pistons.

Next, the compartments 12 and 1 on the side of the head covers 6 and 7
Open/close valves 1 are installed in the pipes 14 and 15 provided from 3.
6 and 17 are provided, and the pipes 14 and 15 are assembled and connected to the operating pressure pipe 18.

Furthermore, piping 21, 22 from the opposite compartment, that is, the compartments 19, 20 on the rod cover 1, 2 side.
A switching valve 27 is provided at the opposite side compartments 19 and 20 to connect or disconnect the operating pressure piping 18, and to discharge the air in the opposite side compartments 19 and 20 upon disconnection.

Here, when talking about the switching valve 27, as shown in the figure, the valves 23, 24, and 2 have two ports.
The valves 5 and 26 are configured in advance so that the valves 23 and 26 are opened and closed at the same time, and the valves 24 and 25 are opened and closed at the same time.

In the embodiment with the above configuration, since the table 5 is moved left and right, when the switching valve 27 is operated, the on-off valves 16 and 17 are also operated and opened at the same time.

First, when the table 5 is moved to the right, the valves 24 and 25 and the on-off valves 16 and 17 are opened. As a result, the operating pressure piping 1
8 is communicated with a compartment 20 on the rod cover 2 side of the air cylinder B via a valve 24 and piping 22. On the other hand, the rod cover 1 of air cylinder A
The side compartment 19 is opened to the atmosphere via a pipe 21, a valve 23, a valve 25, and a throttle valve. At the same time, air at a constant operating pressure is supplied from the operating pressure pipe 18 to the compartments on the side of the head covers 6 and 7, but as the compartment 19 is evacuated, the table 5 moves to the right.

In addition, when moving the compartment 5 to the left, it is sufficient to open the valves 23 and 26 and the on-off valves 16 and 17 at the same time.

Next, when stopping at a predetermined position, the valve 23,
26 and the on-off valves 16, 17, or the valves 24, 25 and the on-off valves 16, 17 are closed simultaneously. As a result, the switching valve 27 is in the state shown in the figure, and the compartments 12 and 13 on the side of the head covers 6 and 7 and the on-off valves 16 and 17 are
The operating pressure is contained between them, and they will not be moved even if external force or vibration is applied.

The embodiment of FIG. 2 is substantially the same as the embodiment of FIG. 1, but in contrast to the embodiment of FIG.
Opening/closing valves 16 and 17 are provided in the pipes 21 and 22 from the compartments 19 and 20 on the 2nd side, and these are collectively connected to the direct operating pressure pipe 18, and the pipes 21 and 22 from the compartments 12 and 13 on the head cover 6 and 7 sides are connected to Switching valve 27 on piping 14, 15
is provided to connect or disconnect the operating pressure piping 16, and furthermore, to connect or disconnect the operating pressure piping 16, and to connect or disconnect the compartments 19, 20 with the disconnection.
It is constructed so that the air inside can be discharged.

In this case, when the valves 24 and 25 are opened simultaneously, the table 5 is moved to the left, contrary to the embodiment shown in FIG. 1, and when the valves 23 and 26 are simultaneously opened, the table 5 is moved to the right. .

In the embodiment shown in FIG. 3, instead of the piston rods 3 and 4 of the cylinders A and B, tubes 8 and 9 are integrated, and the tubes 8 and 9 are made movable.

Therefore, the table 5 is placed on the tube 8, 9 side.
is provided, and the piston rods 3 and 4 are connected to the frame 2.
The fixed side is fixed to the 8th side.

The operation in this case is similar to that of the embodiment shown in FIG.

[Effect of the idea]

According to the present invention, the work table etc. will not move even if an external force or vibration is applied at a predetermined stationary position.

In other words, two air cylinders placed opposite each other at a predetermined stationary position push or pull against each other with the same operating pressure, and the remaining compartment is filled with air, so that, for example, a workpiece on a work table can be moved from a tool to a workpiece on a worktable. It does not move in any direction even if a strong force is applied to it.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an overall circuit diagram, Fig. 2 is an overall circuit diagram showing another embodiment, and Fig. 3 is a circuit diagram showing still another embodiment. . 1, 2... Rod cover, 3, 4... Piston rod, 5... Table, 6, 7... Head cover, 8, 9... Tube, 12, 13... Compartment (on the head cover side), 14, 15, 21, 22...
...Piping, 18...Operating pressure piping, 19,20...
Compartments (on the rod cover side), 23, 24, 25,
26...Valve, 27...Switching valve.

Claims (1)

[Scope of utility model registration request] The piston rods or tubes of the air cylinders installed opposite each other are integrated, one of them is the fixed side and the other is the movable side, a work table is installed on the movable side, and the piping installed from the rod cover side or head cover side of both air cylinders is connected. Each of the switching valves is provided with an on-off valve, and the piping is assembled into an operating pressure piping, and the piping from both compartments on the opposite side is connected to the operating pressure piping via a switching valve, and each of the switching valves is connected to the operating pressure piping. A movement control device for a work table or the like in an automatic machine, characterized in that it is configured to connect or disconnect a side compartment and an operating pressure pipe, and to discharge air in the opposite compartment at the same time as the disconnection.