JP2003028156A - Linear motion rolling guide unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a mechanism for stopping or fixing a slider on an arbitrary position on a track rail with a compact and simple constitution. SOLUTION: The slider 4 crossing the track rail 1 is provided with a hole 11, a sheet 10 is fixed to the slider 4 in a state of being abutted on or close to a sliding face 2 of the track rail 1, and is located in a space 14 formed between the sliding face 2 and the face opposite to the slider 4 and provided with the hole 11, and the air is injected to the space 14 by an external air supply unit 13 through the hole 11 to allow the sheet 10 to be abutted on the sliding face to increase the frictional force, which acts as the brake between the slider 4 and the track rail 1 to stop or lock the slider 4 on the arbitrary position on the track rail 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to various manufacturing apparatuses, various machines, and the like, and enables a slider sliding on a track rail to be stopped at an arbitrary position on the track rail. The present invention relates to a linear motion rolling guide unit.

[0002]

2. Description of the Related Art Conventionally, a linear motion rolling guide unit is shown in FIG.
As shown in FIG. 3, a track rail 1 having groove-shaped track surfaces 3 extending in the longitudinal direction formed on both sides of a sliding surface 2 extending in the longitudinal direction of a substantially rectangular parallelepiped, and a track rail formed in a substantially U shape. 1
It is composed of a uniaxial slider 4 mounted so as to straddle the upper part. Also, the raceway surfaces 3, 3 of the slider 4
Groove-shaped raceway surfaces 5 and 5 extending in the longitudinal direction are formed in a portion facing each other.
A large number of rolling elements 6 are provided between and. As the rolling element 6, for example, a ball, a roller or the like is applied.

By moving the slider 4 relative to the track rail 1, the rolling element 6 rotates and the slider 4 slides on the sliding surface of the track rail 1.

In such a linear motion rolling guide unit, when the slider 4 sliding on the track rail 1 is to be stopped at an arbitrary position on the track rail 1, the linear motion rolling guide unit is conventionally used. A stopper jig 7 having a pressing member 7a capable of projecting / retracting is provided outside the guide unit, and when the slider 4 reaches a stop position, the stopper jig 7 is operated to press the pressing member 7a against the slider 4. , The positioning method is used.

[0005]

When the stopper jig 7 is used for positioning, it is basically necessary to position at any one point with respect to the position to be positioned. In this case, since the stopper jigs 7 are required from two or more locations from the outside, a plurality of stopper jigs 7 or a plurality of pressing members 7a are required if the stopper jigs 7 can be positioned at a plurality of locations. The configuration is large, complicated, and expensive.

Further, even when one stopper jig 7 is to be attached to the linear motion rolling guide unit, a space for attaching the stopper jig 7 is required, and therefore a space for attaching the stopper jig 7 is particularly required. In a small linear motion rolling guide unit with a small
Was difficult to install.

The present invention has solved the above problems and is inexpensive, has a simple structure, is particularly small, and has a strict structure in terms of a mounting space for mounting a stopper jig. An object of the present invention is to provide a linear motion rolling guide unit that can be positioned by.

[0008]

In order to achieve the above object, the invention according to claim 1 provides a sliding surface extending in the longitudinal direction and concave raceway surfaces extending in the longitudinal direction on both side surfaces of the sliding surface. Between the track rail of the track rail and the track surface of the slider, and a slider having a concave track surface at a position facing the track surface, the slider being slidably mounted on the track rail. A linear motion rolling guide unit that includes a rolling element that intervenes and that rolls when the slider is relatively moved, wherein a hole is provided on a surface of the slider that faces the sliding surface of the track rail. A sheet-like friction member facing the sliding surface is provided on the slider, an elastic fluid is injected through the hole, and the sheet-like friction member is pressed by the elastic fluid to contact the track rail. Characterized by comprising a fluid supply unit for. With this configuration, the elastic fluid is injected into the space between the slider and the sheet-shaped friction member to increase the frictional force between the seat and the track rail, so that the slider can be stopped at any position on the track rail.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the elastic fluid is air. With this configuration, the elastic fluid can be easily obtained.

The invention according to claim 3 is the invention according to claim 2, characterized in that a wall is provided around the sheet-like friction member. With this configuration, the airtightness of the space between the sheet-shaped friction member and the slider is increased, and the air that tries to escape to the outside is blocked by the wall, so that the pressing force is maintained and The friction member can be pressed efficiently.

The invention according to claim 4 is characterized in that, in the invention according to claim 1, 2, or 3, the space between the sheet-like friction member and the slider is sealed.
With this configuration, the pressing force is maintained and the sheet-shaped friction member can be efficiently pressed. Moreover, an elastic fluid other than air can be injected.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a schematic structure of an apparatus according to a first embodiment of the present invention. 10 is a sheet having a friction surface, 11 is a surface of a slider 4 opposed to a sliding surface 2 and A through hole, 12 is a joint provided at the edge of the hole 11, and 13 is an air supply unit. The same members as those in the conventional technique shown in FIG. 3 or members having the same function are designated by the same reference numerals and detailed description thereof is omitted.

A hole 11 is provided between the sliding surface 2 of the track rail 1 and the surface of the slider 4 facing the sliding surface 2.
A space 14 communicating with the seat 10 is formed, and the seat 10 is arranged in this space. This sheet 10
The seat 10 is brought into contact with or brought close to the sliding surface 2
The slider 4 is fixed so that no force acts on the sliding surface 2 side. Here, the position of the hole 11 is set at the center of the surface of the slider 4 facing the sliding surface 2, and the joint 12 is oriented in the direction perpendicular to the surface of the sheet 10.

An external air supply unit 13 is connected to the joint 12, and the external air supply unit 1 is connected.
Air is supplied to the space 14 via the joint 12 by means of 3.

Next, the operation will be described. When the slider 4 tries to stop at a predetermined position on the track rail 1, the external air supply unit 13 supplies air through the hole 11. When the seat 10 is pressed by the air, the frictional force between the seat 10 and the sliding surface 2 increases, the brake is applied to the slider 4, and the slider 4 stops on the track rail 1.

With this structure, a mechanism for stopping the slider 4 at an arbitrary position on the track rail 1 can be realized at a low cost and with a simple structure. In particular, since the linear motion rolling guide unit is small in size because it can be configured using small parts, even if the stopper jig 7 as shown in FIG. It is possible to provide a mechanism having the same function as the tool. Air may be supplied to lock the slider 4 at an arbitrary position on the track rail 1.

FIG. 2 is a perspective view showing a schematic structure of an apparatus according to the second embodiment of the present invention, and 15 shows walls formed at both ends of the space 14 in the sliding direction. In addition, the same member as the member in the first embodiment shown in FIG.
Alternatively, members having the same function are denoted by the same reference numerals and detailed description thereof is omitted.

By virtue of this construction, the walls 15,
Since the space 14 is closed by 15 and the outflow of air to the outside is suppressed, the sheet 10 can be efficiently pressed by the air.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned configuration. For example, in FIG. 2, the sheet 10 may be attached to the slider 4 so that the space 14 is completely sealed. With this configuration, the fluid supplied to the space 14 is not limited to air, Oil may be supplied, making it possible to apply any elastic fluid.
In addition, the sealed space 14 in this case is, for example,
It may be realized by attaching a bag-shaped member to the hole 11.

Although the wall 15 is formed on the slider 4 in FIG. 2, it may be formed on the end portion of the sheet 10.

[0022]

According to the present invention constructed as described above, a mechanism for stopping the slider at an arbitrary position on the track rail 1 can be realized by an inexpensive and simple mechanism, and a hole is formed in the slider. Since it can be realized by using a fine component, in which a sheet-like friction member is provided, it can be easily applied to a small unit.

Further, the efficiency of the brake can be improved by forming a wall at the end of the seat in the direction of sealing the space between the slider and the slider.

Also, by sealing the space between the seat and the slider, it is possible to use any elastic fluid, eg oil, instead of air.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration of an apparatus according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional linear motion guide unit that can position a slider at an arbitrary position.

[Explanation of symbols]

1 track rail 2 Sliding surface 3 orbital plane 4 slider 5 Orbital plane 6 rolling elements 7 Stopper jig 7a pressing member 10 sheets 11 holes 12 joints 13 External air supply unit 14 spaces 15 walls

Claims (4)

[Claims] 1. A track rail having a sliding surface extending in the longitudinal direction and concave track surfaces extending in the longitudinal direction on both side surfaces of the sliding surface, and a track surface slidably mounted on the track rail. And a slider having a concave raceway surface in a portion facing each other, and a rolling element interposed between the raceway surface of the raceway rail and the raceway surface of the slider and rolling when the slider is relatively moved. A linear motion rolling guide unit, wherein a hole is provided on a surface of the slider facing the sliding surface of the track rail, and a sheet-like friction member facing the sliding surface is provided on the slider, and the hole is provided. A linear motion rolling plan, characterized by comprising a fluid supply unit for injecting an elastic fluid through Unit. 2. The linear motion rolling guide unit according to claim 1, wherein the elastic fluid is air. 3. The linear motion rolling guide unit according to claim 2, wherein a wall is provided around the sheet-like friction member. 4. The space between the sheet-shaped friction member and the slider is sealed.
Or the linear motion rolling guide unit described in 3.