JPH0249415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air slide device that slides a workpiece support stand of a machine tool or the like without contact or wear by forming an air film between it and a base that supports it. The present invention is characterized in that a ventilating device for supplying or inhaling air is provided on the stationary base side without connecting a ventilating hose or the like for supplying or inhaling air to the work supporting table.

Naturally, in the air slide device as described above, the base is configured to have a required length, and the workpiece support is slid on the base only by the required stroke.

Therefore, it is generally considered to supply air to the workpiece support side, but in that case, it is necessary to connect an air supply or air intake hose to the sliding workpiece support side. However, there is a drawback that the handling of the hose is troublesome.

In other words, the hose must be configured so that it does not get in the way when the workpiece support is slid by becoming tense or hanging down.

The present invention eliminates the above-mentioned drawbacks, and is configured to perform ventilation such as air supply or intake from the base side.

Although this configuration solves the above-mentioned problems such as handling of the hose, constantly supplying or sucking air to the entire sliding surface of the workpiece support on the base side results in wasted air consumption. Become.

Therefore, the present invention is configured so that ventilation such as air supply or intake is automatically performed in accordance with the sliding position of the workpiece support.

Therefore, handling of the ventilation hose is not a problem, and there is no needless consumption of air, which is economical.

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

In the figure, 1 is a base, and 2 is a workpiece support stand. In the present invention, the workpiece support 2 is slid by a screw 3. That is, a screw 3 is supported on support parts 1a at both ends of the base 1 via bearings 4 so as to be parallel to the base 2, and a nut 5 supported on a bracket 2a provided on the workpiece support stand 2 is screwed onto the screw 3. It will be combined.

In the figure, 6 is a motor that rotates the screw 3.

In the present invention, an appropriate number of ventilation holes 7, 7a, 7b, and 7c are further provided at intervals such that at least one of them is located in the workpiece supporter 2 when the workpiece supporter 2 is slid.

As shown in the second figure, they are attached to the workpiece support stand 2.
It is sufficient if the interval is narrower than the width W of . In the case of the embodiment shown in the drawings, the workpiece support stand 2 is provided so as to surround the upper surface, lower surface, and both side surfaces of the base 1, and the ventilation holes 7, 7a, 7b, and 7c are provided on each surface. may be provided only on the top surface and both side surfaces, and may be arranged astride the base 1.

Furthermore, in the case of the present invention, the ventilation holes 7, 7a, 7
The structure is such that ventilation to b and 7c is performed from one end of the base.

That is, the ventilation holes 7, 7a, 7 of the base 1
Communication holes 8, 8a, 8b, 8 are provided at the configuration positions of b and 7c.
Partition walls 9, 9a, 9b, 9c are provided, and one end thereof is connected to the ventilation holes 7, 7a, 7b, 7, respectively.
c, and the communication holes 8, 8a, 8b, 8
a ventilation hose or pipe 10 at the other end of c;
10a, 10b, 10c are connected to form the base 1.
It is led out to one end of the motor 6, that is, to the side opposite to the motor 6.

Next, an auxiliary screw 11 is connected to one end of the screw 3, that is, the end opposite to the motor 6, and a slider 12 is connected to the auxiliary screw 11.
are screwed together.

In the figure, reference numeral 13 indicates a rotation prevention guide for the slider 12.

The auxiliary screw 11 is compactly constructed by minimizing the pitch and shortening the stroke of the slider 12.

Further, the slide position of the slider 12 is sequentially switched by the slider 12, and the ventilation holes 7, 7a, 7 where the workpiece support base 2 is located.
Appropriate number of switching valves 1 that ventilate only b and 7c
4, 14a, 14b, and 14c are provided.

In the case of the drawing embodiment, the switching valves 14, 14
a, 14b, and 14c are configured as plunger types, and the slider 12 mechanically presses the respective plungers 15, 15a, 15b, and 15c in sequence to perform switching. However, the switching valve 14,
Electrical contacts may be activated to switch between 14a, 14b and 14c.

In the present invention having the above structure, the sliding of the work supporting table 2 by the screw 3 and the sliding of the slider 12 by the auxiliary screw 11 are performed synchronously, and the ventilation holes 7, 7a, 7b where the work supporting table 2 is located,
Switching valves 14, 14a, 14 corresponding to 7c
b and 14c are sequentially switched by the slider 12.

Not only one control but also two controls are performed at the same time as shown in the second figure.

As described above, the present invention provides ventilation holes 7, 7a, 7b, 7 provided at appropriate intervals in the base 1 when the workpiece support 2 supported on the base 1 is slid.
In c, compressed air is supplied only between the base 1 and the workpiece support 2 from the ventilation hole where the workpiece support 2 is located, and an air film is sequentially formed to allow the workpiece to slide without contact or wear. It is possible,
Compressed air is not supplied from other ventilation holes, and air is not wasted.

FIG. 4 shows another embodiment of the portion corresponding to FIG. 3 above.

That is, this is an example in which an air film is formed between the upper surface of the base 1 and the workpiece support 2 due to the supply of compressed air, and the workpiece support 2 is suctioned by suction air in order to keep the workpiece support 2 completely stationary in a fixed position. .

In this case, it is possible to provide a lip-shaped sealing material 16 that is open on the outside so as to surround the surface corresponding to the upper surface of the base 1 of the workpiece support table 2, supply air to the communication hole 8c, and further perform air intake. You just need to configure it so that it can be done. For this purpose, when the motor 6 stops, the switching valve 14c or 14, 14a, 1
4b may be configured to be switched to intake air. When the workpiece support base 2 is slid, the communication hole 8c
If compressed air is supplied from the ventilation hole 7c, the sealing material 16 can be separated from the base 1 to form an air film, and when the workpiece support platform 2 is stopped, the communication hole 8
c. When air is taken in through the ventilation hole 7c, the sealing material 16 comes into close contact with the base 1, and the space between the base 1 and the workpiece support 2 surrounded by the sealant 16 is created in a vacuum state, and the workpiece support 2 is brought into close contact with the base 1. It is possible to maintain a completely stationary state.

However, holding the workpiece support 2 in close contact is not so necessary when the workpiece support 2 is slid by the screw 3 and nut 5 as in the embodiment shown in the drawings.

As mentioned above, the present invention performs ventilation from the base side in accordance with the sliding of the workpiece support.
Since there is no need to connect a ventilation hose or the like to the side of the moving workpiece support, there is no need to worry about handling the ventilation hose.Furthermore, when the workpiece support is slid, ventilation is performed only at the sliding position of the workpiece support. Since this is done, it is possible to obtain the effect of not wasting air.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of the main part, FIG. 2 is a vertical sectional view of the main part, and FIG.
The figure is a sectional view taken along the line A--A in FIG. 2, and FIG. 4 is a sectional view showing another embodiment and corresponding to FIG. 3. 1...Base, 2...Work support stand, 3...Screw, 7, 7a, 7b, 7c...Vent hole, 11...Auxiliary screw, 12...Slider, 14, 14a,
14b, 14c...Switching valve.

Claims (1)

[Scope of Claims] 1 Consists of a base and a workpiece support that slides on the base with a screw, and the base has at least one spaced apart support that is positioned on the workpiece support when the workpiece support is slid. Further, an auxiliary screw is connected to one end of the screw, and a slider is screwed onto the auxiliary screw, and the sliding position of the slider is sequentially changed by the slider, and the position of the workpiece support is changed by the slider. An air slide device characterized in that an appropriate number of switching valves are provided to provide ventilation only to the ventilation holes. 2. The air slide device according to claim 1, wherein the switching valve is of a plunger type.