JP3508503B2 - Linear guide device - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention is a machine tool, industrial machine, relates to an improvement of Riniagai de equipment used in the measurement device or the like, in particular enhance the sealing performance of the side seal The purpose is to extend the life of the linear guide. 2. Description of the Related Art Conventionally, for example, a linear guide as shown in FIG. 5 has been known. It comprises a guide rail 1 extending long in the axial direction, and a slider 2 having a substantially U-shaped cross section which is movably straddled thereon. Guide rail 1
Are formed on both side surfaces of each of the two ball rolling grooves 3 extending in the axial direction. Slider body 2A of slider 2
The ball rolling grooves (not shown) facing the ball rolling grooves 3 are formed on the inner side surfaces of both sleeves. A large number of balls as rolling elements are rotatably mounted between the opposed ball rolling grooves, and the slider 2 is axially moved on the guide rail 1 through the rolling of the balls. It is designed to move. A ball return passage (not shown) penetrating in the axial direction is formed in the thickness of the sleeve of the slider body 2A, and the end cap 2B having a substantially U-shaped cross section attached to the front and rear ends of the slider body 2A is provided with the above-mentioned. A U-shaped curved path that connects the ball return path and the ball rolling groove 3 is formed to form an endless ball circulation path. The ball rolling between the guide rail 1 and the slider 2 advances in the ball rolling groove as the slider 2 advances and moves to one end of the slider body 2A, where it is guided to a curved path. The U-turn makes a U-turn and moves to the other end of the slider body 2A via the ball return path, where it is guided to the other curved path, makes a reverse U-turn, and returns to the ball rolling groove. [0004] Incidentally, g in FIG. 5 is a grease nipple for supplying a lubricant to a ball rolling portion or the like inside the slider 2. By the way, when foreign matter such as dust, dirt and chips enters the gap interposed between the guide rail 1 and the slider 2 which is laid on the guide rail 1 and moves relatively, it adheres to the ball rolling groove surface or the like. The smooth rolling of the ball is hindered. Therefore, a side seal 10 is attached to the outer end face of the end cap 2B as a seal device for preventing foreign substances from entering through gaps at both front and rear ends in the moving direction of the slider 2. [0005] The conventional side seal 10 generally comprises
For example, a sealing member made of nitrile rubber or urethane rubber is welded to a reinforcing steel plate having a U-shaped cross section, and is usually attached to end caps 2B at both front and rear ends of the slider 2 by bolts one by one. Rail 1
The slider 2 is in sliding contact with the outer surface of the slider 2 to prevent foreign matter from entering from both front and rear ends of the slider 2. [0006] When the linear guide is installed in a particularly dusty place, the sealing performance and the wiping performance of adhering foreign substances are improved by stacking and assembling two standard side seals which are usually used alone. I have. [0007] However, even in such a seal device in which two side seals are stacked and assembled, even in a severe environment such as an extremely large amount of dust as in the case of wood processing. Below, there was a problem that sufficient sealing performance could not be obtained. The present invention has been made in view of such problems of the conventional linear guide seal device, to provide a Riniagai de equipment to exhibit excellent sealing performance even in an extremely harsh environment It is an object. [0008] To achieve the above object, the present invention provides a guide rail and sleeves on both sides of the guide rail.
Having a slider body and an end face of the slider body
A pair of end caps, the guide rail and the slide
The ball rolling grooves formed in the slider body are
And the relative straightness of the slider comprising the end cap.
A large number of balls rolling with linear motion, and the slider
In linear <br/> struggling de equipment comprising a mounted sealing device on the end face, the said sealing device Endoki of
Two U-shaped supports of approximately the same size as the cap
Placed between these side seal plates
The side seal plate.
The space for releasing the sealing pressure is provided inside the spacing member.
The guide rail is formed to surround the outer surface of the guide rail, and
Open the lower ends of the spaces located on both sides of the
Closely located outside of the two side seal plates
Dust that has passed through the side seal plate
It can be discharged to the outside . Here, a porous member provided with a seal lip having a shape closely contacting the outer surface of the guide rail can be housed and mounted inside the spacing member. Also,
The porous member may contain lubricating oil. [0010] [action] Riniagai de equipment of the present invention, the slider arranged side seal plate in a state of axially aligned in the longitudinal spacing member through a gap member that is longitudinal section a U-shaped It was configured to be fixed to the outside of the end cap. Therefore, space is formed between the two side seal plate, so fine foreign matter entering from the outside of the side sealing plates inside the pressure remains in the space is opened, the sealing effect of the second-stage side seal plate Work effectively. Also, each side seal
Since the plates are independently supported, adjustment of the sealing pressure can be performed independently. As a result, the sealing performance such as the sealing performance and the wiping performance of foreign substances is improved as compared with the case where the two side seal plates are simply adhered and overlapped. In the case where a porous member having a shape surrounding the outer surface of the guide rail is housed and mounted inside the spacing member, the dustproof performance and the wiping performance of the outer surface of the guide rail are further increased. By including lubricating oil in the porous member, a lubricating effect on the guide rail track surface and a rust preventing effect on the outer surface of the guide rail can be obtained. Embodiments of the present invention will be described below with reference to the drawings. The same or corresponding parts as those in the related art are denoted by the same reference numerals. FIG. 1 shows a standard type side seal plate mounted on the end surface of the linear guide in the moving direction of the slider 2. The side seal plate 10 is formed by bonding or baking a rubber or synthetic resin seal plate 11 to the outer surface of a not-shown side seal reinforcing plate made of a thin steel plate having a substantially U-shape and adapted to the outer shape of the end cap 2B. It is formed by sticking. The seal plate 11 has a U-shape protruding inward from the side seal reinforcing plate, and has a seal lip L on the inner peripheral edge of the central concave portion 12 that receives the guide rail and that is in close contact with the outer surface of the guide rail 1. are doing. That is, the lower semicircular ball rolling groove 3 formed on the side surface of the guide rail 1 one by one on both side inner edges of the central concave portion 12 of the sealing plate 11 and the bottom of the groove bottom. Groove sliding contact projections 13 having shapes conforming to the shapes of the ball rolling groove 3 and the cage escape groove 3a are provided so as to be in close contact with the cage escape groove 3a. The corner portion of the central recess 12 has a quadrant-shaped ball rolling groove 3 in close contact with the upper-stage substantially quadrant-shaped ball rolling groove 3 formed at the ridge where the upper surface and the side surface of the guide rail 1 intersect. Groove sliding contact projections 14 are provided. Of the inner peripheral edge of the seal lip L, portions other than the groove sliding contact projection 13 and the groove sliding contact projection 14 are formed in dimensions and shapes capable of slidingly contacting the upper surface of the guide rail 1 and flat portions on both side surfaces. On the plate surface of the side seal plate 10, a through hole 15 with a counterbore for inserting the mounting bolt B1 into the end cap 2B and a grease nipple through hole 16 with a counterbore are formed. FIG. 2 is a perspective view of the spacing member 20 interposed between the two side seal plates 10. The spacing member 20 of this embodiment is formed using, for example, a thin steel plate, and has dimensions and dimensions of a front surface 20a and a back surface 20b.
The shape is a U-shape having substantially the same size as that obtained by removing the seal lip L projecting from the side seal plate 10 of FIG. 1 to the inner peripheral edge of the central concave portion, and the width of the side surface 20 c, that is, the thickness of the spacing member 20. The thickness T is arbitrary, but is desirably about twice the thickness of the side seal plate. Thus, the front surface 20a, the back surface 20b and the side surface 2
A U-shaped space 21 surrounded by Oc is formed inside the spacing member 20. In order to attach the spacing member 20 to the slider, a bolt hole 22 penetrating the front surface 20a and the back surface 20b is provided, and a through hole 23 for a connector screw for attaching a grease nipple is provided. FIG. 3 shows an embodiment of a sealing device for a linear guide according to the present invention. The seal device of the present invention is usually used by being assembled at both front and rear ends in the movement direction of the slider 2, but the following description will be made on the example illustrated on one end side in the assembling order. First, the side seal plate 10a is applied to the end face of the end cap 2B of the slider of the linear guide. A ring-shaped collar 25 is fitted into the through hole 15 with a counterbore of the side seal plate 10a to fill the counterbore. Further, a ring-shaped collar 26 is fitted into the grease nipple through-hole 16 to fill the counterbore. Next, the spacing member 20 is overlapped with the surface of the side seal plate 10a, and the guide rail 1 is inserted into the slider 2 to protrude from the central recess 12 of the side seal plate 10a. After that, another side seal plate 1
0b is applied to the surface 20a of the spacing member 20, the mounting bolt B1 is passed through the counterbore-provided through hole 15 of the side seal plate 10b, and the bolt hole 22 of the spacing member 20 and the through hole 15 of the other side seal plate 10a are formed. After passing through each hole, it is screwed into a screw hole (not shown) provided on the end face of the end cap 2B and tightened. Thus, the linear guide sealing device in which the side seal plate 10a, the spacing member 20, and the side seal plate 10b are integrally laminated is fixed to the end surface of the slider 2. Finally, the connector bolt B2 is passed through the grease nipple through hole 16 of the outer side seal plate 10b, and the through hole 23 of the connector screw of the spacing member 20 and the through hole 16 of the other side seal plate 10a are respectively inserted. After the passage, the screw is screwed into a screw hole provided in the end face of the end cap 2B, and the grease nipple g is screwed into the female screw 26 of the connector bolt B2. By mounting the linear guide seal device thus mounted on the front and rear ends of the slider body 2a, the seal lips L of the side seal plates 10a and 10b are attached to the side surfaces of the guide rail 1 and the ball rolling grooves 3 thereof. To contact the groove surface of the retainer escape groove 3a and the upper surface of the guide rail to seal the front and rear openings between the gaps between the opposing surfaces of the guide rail 1 and the slider 2, so that dust enters from the front and rear of the slider 2. To block. In this case, the space 2 formed by the spacing member 20 between the two side seal plates 10a, 10b.
1, the sealing performance such as the sealing performance and the wiping performance of foreign substances is superior to that obtained by simply stacking the two side seal plates 10 in close contact with each other. In the above-described embodiment, the space member 20 has been described as being left in the space 21.
The present invention is further improved by providing a plurality of porous members 30 made of felt or open-cell sponge having the shape shown in FIG. Performance is improved. The porous member 30 has a substantially U-shape, and the central concave portion 31 has a shape and dimensions that closely surround the outer surface of the guide rail 1 and
A through hole 32 for the side seal mounting bolt B1 and a through hole 33 for the connector bolt B2 are provided. By accommodating and attaching the porous member 30 in the spacing member 20, there is an advantage that the dustproof performance and the wiping performance of the outer surface of the guide rail are further increased. Further, the lubrication hole 24 may be provided in the interval member 20 so that the porous member 30 may contain a lubricant. In that case, the lubricant contained in the porous member 30 gradually seeps out and is automatically supplied to the sliding contact surface of the guide rail 1. Thereby, a lubricating effect on the groove surface of the ball rolling groove 3 of the guide rail 1 and a rust preventing effect on the outer surface of the guide rail are obtained, and smooth operation can be obtained for a long period of time. In the present invention, the front and rear side seals 10 are used.
It is possible to adopt a configuration in which the sealing pressures a and 10b are changed. By making the front-side sealing pressure slightly higher than the rear-side sealing pressure, effective sealing can be achieved. In other words, the front and rear side seals are fixed via U-shaped spacing members, and the lip portion is elastically supported. Excessive damage is prevented. The type of the linear guide device to which the present invention is applied is not limited as long as the slider 2 is mounted across the guide rail 1. For example, in the above embodiment, the ball rolling groove 3 has one side. Although two rows are described, one row or two or more rows may be used. In that case, the groove sliding projections 13 and 14 of the side seal 10 are of course formed in accordance with the ball rolling grooves 3. Although the case where a ball is used as a rolling element has been described, the present invention can also be applied to a case using a roller. [0025] As has been described in the foregoing, the present onset Ming, formed in a U-shape sealing device at approximately the same size as the end cap
Two side seal plates and these side seal plates
And a U-shaped spacing member placed between
The space for releasing the sealing pressure of
Since the guide rail is formed so as to surround the outer surface of the guide rail, it is possible to obtain a linear guide device having improved sealing performance such as sealing performance and foreign matter wiping performance as compared with the conventional one. Further, in the case where a porous member having a shape surrounding the outer surface of the guide rail is housed and mounted inside the spacing member, even greater dustproof performance and wiping performance of the outer surface of the guide rail can be obtained. If the porous member is made to contain a lubricant, a lubricating effect on the guide rail raceway surface and a rust preventing effect on the outer surface of the guide rail can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of one embodiment of a side seal plate constituting a linear guide sealing device of the present invention. FIG. 2 is a perspective view of one embodiment of a spacing member constituting the linear guide sealing device of the present invention. FIG. 3 is an exploded perspective view illustrating mounting of the linear guide sealing device of the present invention. FIG. 4 is a perspective view of members constituting another embodiment of the linear guide sealing device of the present invention. FIG. 5 is a perspective view of a conventional linear guide. [Description of Signs] 1 Guide rail 2 Slider 10 Side seal plate 11 Seal plate L made of rubber or synthetic resin Seal lip 20 Spacing member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-46216 (JP, A) JP-A-6-264923 (JP, A) JP-A-4-23818 (JP, U) JP-A-2-46218 48612 (JP, U) Japanese Utility Model Hei 3-4927 (JP, U) Japanese Utility Model Sho 58-88055 (JP, U) Japanese Utility Model 52-30461 (JP, Y1) International Publication 93/012351 (WO, A1) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) F16C 29/06

Claims (1)

(57) [Claims] [Claim 1] A guide rail and both sides of the guide rail
A slider body having a sleeve portion and an end surface of the slider body
A pair of end caps covering the guide rail and the front
The ball rolling grooves formed in the slider body are
Slider and the end cap
A large number of balls rolling with relative linear motion;
And a sealing device attached to the end face of the lidar.
Approximately the same size as in Riniagai de equipment, the sealing device and the end cap that
And two side seal plates formed in a U-shape
U-shaped spacing member placed between side seal plates
Air to release the sealing pressure of the side seal plate.
Surround the outer surface of the guide rail inside the spacing member
Before being formed on both sides of the guide rail
Open the lower end of the space to the outside and
Pass through the outer side seal plate among the seal plates
Riniagai de equipment that <br/> be characterized with dust were be discharged to the outside from the inside of the spacing member.