JP2023040975A - Slide guiding device and air chuck using the same - Google Patents

Abstract

To provide a slide guiding device which can prevent the degradation of sliding smoothness due to dust even when using for a long period, and an air chuck using the same.SOLUTION: A slide guiding device includes a slide base having a concave part with a U-shaped cross section and a concave bearing part provided over both side walls of the concave part, a slider stored in the concave part of the slide base and having a concave shaft contact part formed over both sides, and a columnar slide body arranged between the concave bearing part of the slide base and the concave shaft contact part of the slider, the slider being assembled slidably on the slide base. On each of the surface the concave bearing part and the surface of the concave shaft contact part, a plurality of linear protrusion parts are formed. The air chuck includes two sliders arranged in the slide guiding device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sliding guide device with excellent durability and an air chuck using the same.

At present, sliding guide devices are widely used in machine tools and the like. For example, in Patent Document 1, in a rail guide in which a linear guide provided with a bearing is inserted into the rail guide and the linear guide is reciprocated along the rail guide, the surface of the rail guide with which the bearing of the linear guide contacts Two parallel grooves are provided in each of the two grooves, and a rail rod made of hardened steel is inserted into each of the two grooves, and one side of the rail rod is exposed from the groove, and this side is exposed. A rail guide provided with a linear guide and a rail rod is disclosed, in which a bearing of the linear guide is slidably inserted between two rail rods to reciprocate the linear guide along the rail guide. . In this technology, ball bearings are used as sliding guide bearings.

Patent Document 2 discloses a long rail in which at least one pair of recessed sliding grooves is formed on both side wall surfaces in the sliding direction, and a sliding groove of the rail attached so as to straddle the rail. In a sliding guide sliding unit comprising a sliding base having a substantially U-shaped cross section and having a bank-shaped sliding portion that protrudes and contacts, the sliding base has an inner wall surface facing the sliding groove of the rail. Between the mounting groove and the sliding groove, rollers that contact the respective grooves and form the above-mentioned bank-shaped sliding portion are fitted, and the rollers are on the sliding table side. A sliding guide unit is disclosed which is characterized by being affixed to a. In this technique, the rollers are fixed to the slide base, and as is clear from FIG. 3, the curved surfaces of the rollers and the slide grooves of the rails are in contact with each other.

Patent Document 3 discloses a guide rail having sliding grooves extending in the axial direction on both side surfaces, and a guide rail having sliding grooves opposed to the sliding grooves of the guide rail so as to be relatively movable in the axial direction. and a cylindrical sliding member slidably interposed between the facing sliding grooves of the guide rail and the slider, the sliding groove having a cross section of Gothic arch shape. A motion guide is disclosed. In this technique, the cylindrical sliding member is slidably interposed between the sliding grooves, and the surface of the sliding groove is Gothic arch-shaped so that the curved surfaces contact the cylindrical sliding member. there is

JP-A-9-210059 Japanese Utility Model Laid-Open No. 1-143424 Japanese Utility Model Laid-Open No. 4-58620

In Patent Document 1 mentioned above, a plurality of ball bearings are used as bearings for sliding, but when used for a long period of time, dust and the like tend to enter between the balls, and sliding may not be smooth. rice field. Further, in Patent Documents 2 and 3, a cylindrical sliding member is used as a sliding bearing, but since the surface of the sliding groove in contact with this member is a curved surface, the sliding member and the sliding groove are There is a problem that the smoothness of sliding is likely to be impaired when dust enters the vicinity of the contacts.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding guide device and an air chuck using the same, which can prevent deterioration of sliding smoothness due to dust and the like even when used for a long period of time.

In order to solve the above-mentioned problems, the sliding guide device according to the present invention comprises: a sliding base having a concave portion having a U-shaped cross section and concave bearing portions provided on both side walls of the concave portion; and the concave portion of the sliding base. and a cylindrical sliding member disposed between the concave bearing portion of the slide table and the concave shaft contact portion of the slider. 1. A sliding guide device in which said slider is slidably assembled with respect to said slide base, wherein a plurality of linear projections are formed respectively on the surface of said concave bearing portion and said concave shaft contact portion surface. do.

Further, an air chuck according to the present invention includes a slide base having a concave portion having a U-shaped cross section and concave bearing portions provided on both side wall portions of the concave portion, and a sliding base accommodated in the concave portion on both sides of the slide base. and a cylindrical sliding member disposed between the recessed bearing portion of the slide table and the recessed shaft contact portion of the slider, wherein the slider contacts the slide. A slide guide device is provided slidably assembled with respect to the slide, and a plurality of linear protrusions are formed on the surface of the concave bearing portion and the surface of the concave shaft contact portion, respectively, and the slider It is characterized in that two units are arranged in the length direction of the slide table and are formed so as to be slidable relative to each other.

In the sliding guide device according to the present invention, a plurality of linear protrusions are formed on the surface of the concave bearing portion and the surface of the concave shaft contact portion, respectively, and these protrusions contact the cylindrical sliding member. The space in the vicinity of the contact is widened, and the influence of dust on sliding can be reduced. Therefore, it is possible to provide a sliding guide device that can maintain its performance over a long period of time.

In the air chuck according to the present invention, two sliders are arranged in the slide guide device in the longitudinal direction of the slide table, and these sliders are driven in opposite directions to grip and release an article. can function as As a result, it is possible to provide an air chuck that can reduce the influence of dust and the like on its operation and maintain its performance over a long period of time.

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic diagram of a main part of a sliding guide device according to the present invention. This figure shows the contact relationship between one of a set of two cylindrical sliding members 1 and the slide base 31 and the slider 20 . Recessed bearing portions 32 are formed on both side walls of the recessed portion of the slide table 31 having a U-shaped cross section, and recessed shaft contact portions 22 are formed on both sides of the slider 20. Further, the recessed bearing portions 32 and the recessed shaft contact portions are formed. A plurality of linear projections 33, 23 are provided on the surface of 22, respectively. These linear protrusions 23 and 33 are formed linearly in the longitudinal direction of the cylindrical sliding member 1 , and are in contact with the cylindrical sliding body 1 at these linear protrusions 23 and 33 . . By providing the linear protrusions 23 and 33, not only does the contact area with the cylindrical sliding member 1 become narrow and clear, but also spaces are created on both sides of the linear protrusions 23 and 33, thereby preventing movement due to dust and the like. It is possible to prevent the influence of

FIG. 2 shows (a) a front view and (b) a partial sectional view of an embodiment in which the sliding guide device according to the present invention is applied to an air chuck. FIG. 3 is a perspective view of this embodiment, and FIG. 4 is a perspective view with a part of the slide base 31 removed to clarify the position of the cylindrical sliding member 1. As shown in FIG. A set of two sliders 20 is arranged in a slide table 31 having a U-shaped cross section, and cylindrical sliding members 1 are arranged between both sides of the slider 20 and the wall surface of the slide table 31 . A concave shaft contact portion 22 having a plurality of linear protrusions 23 is formed on both sides of the slider 20 . A chuck claw 21 is formed on each slider 20 . On the other hand, recessed bearing portions 32 are provided on both sides of the wall surface of the slide table 31, and a plurality of linear protrusions 33 are formed on the surface of the recessed bearing portion 32. As shown in FIG. The cylindrical sliding member 1 is in contact with the slider 20 and the sliding base 31 via the linear protrusions 23 and 33 . A means for opening and closing the chuck by driving a set of two sliders 20 in the horizontal direction in FIG. 2B is provided in the chuck body 30 .

Since the chuck of the above-described embodiment is used in a machine tool or the like and is frequently opened and closed, dust or the like tends to enter, causing failure. In the air chuck according to the present invention, the concave shaft contact portion 22 on the slider 20 and slide table 31 and the linear protrusions 23 and 33 in the concave bearing portion 32 contact the cylindrical sliding member 1, so the contact points are In addition to making the space narrower and clearer, it is possible to prevent the influence of dust and the like on the operation by creating spaces on both sides of the linear protrusions 23 and 33 .

In the above embodiment, the linear protrusions 23 and 33 are shown as boundary portions of curved surface processing with different radii, but this is not a limitation, and the surfaces of the concave shaft contact portion 22 and the concave bearing portion 32 are more curved than other portions. As long as it protrudes, its shape does not matter.

In the sliding guide device and the air chuck according to the present invention, the linear protrusions are provided between the cylindrical sliding member and the slider/sliding table. impact can be reduced. Therefore, it is possible to provide a sliding guide device that can maintain its performance over a long period of time.

1 is a schematic diagram showing a main part of a sliding guide device according to the present invention; FIG. It is (a) a front view and (b) a partial cross-sectional view showing an embodiment of an air chuck according to the present invention. Fig. 2(a) is a perspective view of the embodiment shown in Fig. 2(a); Fig. 2(b) is a perspective view of the embodiment shown in Fig. 2(b);

1 Cylindrical sliding member 20 Slider 21 Chuck claw 22 Concave shaft contact portion 23 Linear projection 30 Chuck main body 31 Slide table 32 Concave bearing 33 Linear projection

Claims (2)

a slide base having a concave portion with a U-shaped cross section and concave bearing portions provided on both side walls of the concave portion; and a slider housed in the concave portion of the slide base and formed with concave shaft contact portions on both sides and a cylindrical sliding member disposed between the concave bearing portion of the slide base and the concave shaft contact portion of the slider, wherein the slider is slidable with respect to the slide base. An assembled slide guide device, wherein a plurality of linear protrusions are formed on the surface of the concave bearing portion and on the surface of the shaft contact portion. 2. An air chuck using a sliding guide device according to claim 1, wherein two sliders are arranged in the longitudinal direction of said slide table so as to be slidable relative to each other.

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