JPH08270661A - Seal device for linear guide device - Google Patents

Abstract

PURPOSE: To provide a seal device for a linear guide device which is so constituted as to integrally interjoin a seal member formed of a lubricant polymer member and a reinforcing member without using an adhesive, hardly break, and prevent rapid exudation of a lubricant even when a mounting screw is fastened. CONSTITUTION: A seal device for a linear guide device comprises a lubricant- contained polymer member 42 formed of a polyorefin polymer previously containing a lubricant and having a seal part making slide contact with the surface to be sealed of a guide rail; and a reinforcing member 41 joined integrally therewith. The lubricant-contained polymer member 42 is moulded integrally with the reinforcing member 41 through an engaging part A formed through combination of recesses and protrusions to produce a seal device. Mounting on to the linear guide device is effected in such a manner that the screw-through holes 44 part of the reinforcing member 41 is fastened through a screw.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a sealing device for a linear guide device used in machine tools, industrial machines and the like.

[0002]

2. Description of the Related Art Conventionally, as a generally used linear guide device, for example, as shown in FIG. 17, a guide rail 1 having a rolling element rolling groove 3 on its outer surface and extending in the axial direction, and a guide rail for the guide rail 1 are provided. It is known that the slider 2 is mounted so as to straddle the rail 1. The slider 2 is the slider body 2
The slider main body 2A has a rolling element rolling groove (not shown) facing the rolling element rolling groove 3 of the guide rail 1 on the inner surface of both sleeve portions 4 and is composed of A and end caps 2B attached to both ends thereof. At the same time, it has a rolling element return path (not shown) that penetrates the thick portion of the sleeve in the axial direction. On the other hand, the end cap 2B has a curved path (not shown) that communicates the rolling element rolling groove of the slider body 2A with the rolling element returning path parallel to the rolling groove. A circulation circuit of rolling elements is formed by the path and the curved paths at both ends. A large number of rolling elements made of, for example, steel balls are loaded in the circulation circuit of the rolling elements.

The slider 2 mounted on the guide rail 1 is
The rolling elements smoothly move along the guide rails via the rolling of the rolling elements in the rolling elements of the opposing rolling elements, and during the movement, the rolling elements circulate infinitely in the rolling element circulation path in the slider. As shown in FIG. 18, the slider 2 is provided with a side seal 5, which is a sealing device at both ends (end face of each end cap 2B), as a dust-proof sealing device for sealing an opening between the guide rail 1 and the slider 2. An under seal 6 is attached to the lower surface. These conventional seals are generally made of rubber such as NBR (acrylonitrile butadiene rubber).

With respect to the lubrication of such a conventional linear guide device, normally, grease or lubricating oil is supplied from a grease nipple 7 attached to the slider 2 to a circulation circuit of the rolling elements to lubricate the rolling elements. Was being done. However, in such a linear guide device of the lubrication system which directly uses the lubricating oil or grease as it is, especially when it is used in a high temperature environment, those lubricants filled in the slider flow to the outside. Since it will be drained, it is consumed quickly and must be replenished in a short period of time. In order to improve this point, the present applicant previously applied for a sealing device made of a polymer member containing a lubricant (JP-A-6-346919). This one is
A seal member such as a side seal or under seal to be mounted on the slider of the linear guide device is formed of rubber or synthetic resin containing lubricant, and the lubricant is continuously exuded from the seal member (polymer member containing lubricant) for a long period of time. Is automatically supplied to the rolling element circulation circuit of the slider.

[0005]

However, even with such a conventional sealing device having self-lubricating property,
There are the following problems. Since the seal member made of the lubricant-containing polymer member contains a large amount of lubricant, its hardness and strength are considerably lower than those of general NBR-made seal members. Is likely to be damaged or cracked in the seal portion of the guide rail, in particular, the protrusion contacting the rolling element rolling groove of the guide rail, and as a result, the function as a seal may not be achieved.

The conventional general side seal is NBR.
A rubber member made of, for example, and a reinforcing member (core wire) are bonded and integrated with an adhesive. However, even if an attempt is made to similarly bond the lubricant-containing polymer member and the mandrel with an adhesive, it is difficult to bond them due to the large amount of oil contained. To attach the sealing device to the end cap of the slider, it is necessary to fix the lubricant-containing polymer member by inserting a screw into a through hole for inserting a mounting screw. But,
Hardness is obtained by tightening the screws. Deformation and cracks may occur in the lubricant-containing polymer member having low strength, and the lubricant may exude from the portion where the screw is tightened and pressure is applied, and the lubricant is consumed early. It is also conceivable to insert a ring-shaped spacer or the like to prevent the lubricant from seeping out early by tightening the screws.
In that case, the cost increases.

Therefore, the present invention has been made by paying attention to such conventional problems, and has a construction in which a reinforcing member is integrally joined to a seal member made of a lubricant polymer member without using an adhesive. Therefore, it is an object of the present invention to provide a seal device for a linear guide device which is less likely to be damaged and prevents the lubricant from leaking out early by tightening the mounting screw.

[0008]

DISCLOSURE OF THE INVENTION The present invention for achieving the above object includes a guide rail having an axial rolling element rolling groove, and
The rolling element rolling groove which is opposed to the rolling element rolling groove of the guide rail, and the rolling element return passage parallel to the groove and the curved path which connects the passage and the groove are provided. It is attached to the slider of a linear guide device which is a slider that is relatively moved by being guided by the guide rail by the rolling of a large number of rolling elements rolling in the rolling groove, and between the inner surface of the slider and the outer surface of the guide rail. A sealing device of a linear guide device for sealing a gap, wherein the sealing device is made of a polyolefin-based polymer containing a lubricant in advance, and a lubricant-containing polymer member formed with a seal portion slidingly contacting a sealed surface of the guide rail. A reinforcing member that is superposed on and integrally joined to this, and that the reinforcing member and the lubricant-containing polymer member are integrally molded through an engaging portion formed by a combination of projections and depressions. And butterflies.

[0009]

According to the seal device of the linear guide device of the present invention, the lubricant gradually exudes with time from the seal portion of the lubricant-containing polymer member that is in contact with the sealed surface of the guide rail, and the lubricant automatically passes through the guide rail. Is uniformly supplied to the surface of the rolling element. Therefore, stable lubrication is performed over a long period of time.

In the sealing device of the present invention, the lubricant-containing polymer member and the reinforcing member which is superposed on the lubricant member are integrally molded through the engaging portion formed by the combination of the concavities and convexities so as to be strong without an adhesive. Can be integrated into. Therefore, even when the seal device is mounted on the slider and continuously run, the lubricant-containing polymer member does not crack or break.

Further, since the lubricant-containing polymer member is integrated with the reinforcing member, the through hole for the mounting screw for attaching to the linear guide device should be provided in the reinforcing member having high strength while avoiding the lubricant-containing polymer member. Good, the tightening force of the mounting screw can be directly received only by the reinforcing member. Therefore, there is no problem such that the lubricant-containing polymer member is deformed or damaged by tightening the mounting screw, or the lubricant-containing polymer oozes out early.

Materials for the sealing device of the linear guide device of the present invention will be described in detail below. The lubricant-containing polymer member used in the sealing device of the present invention is a polymer selected from the group of polyolefin-based polymers having basically the same chemical structure, such as polyethylene, polypropylene, polybutylene, and polymethylpentene. -A mixture of paraffin hydrocarbon oil such as olefin oil, naphthene hydrocarbon oil, mineral oil, ether oil such as dialkyldiphenyl ether oil, ester oil such as phthalate ester and trimellitate ester, etc. After being heated and melted, it is poured into a predetermined mold and cooled and solidified while being pressurized, and molded.
What added various additives, such as a rust preventive agent, an anti-wear agent, a defoaming agent, and an extreme pressure agent, may be used.

The composition ratio of the lubricant-containing polymer member is, based on the total weight, 20 to 90% by weight of the polyolefin polymer and 80 to 10% by weight of the lubricant. When the content of the polyolefin-based polymer is less than 20% by weight, the hardness and strength required for the seal cannot be obtained. Further, when the content of the polyolefin-based polymer exceeds 90% by weight (when the amount of the lubricant is less than 10% by weight), the amount of the lubricant supplied is reduced, resulting in poor lubrication of the linear guide device itself.

The above-mentioned groups of polymers have the same basic structure but different average molecular weights, and are 1 × 10 ^{3 to} 5 × 10 ^6.
Range. Among them, average molecular weight 1 × 10
Those with relatively low molecular weight of ³ to 1 × 10 ⁶ and 1 × 1
An ultrahigh molecular weight compound of 0 ^{6 to} 5 × 10 ⁶ is used alone or as a mixture if necessary. In order to improve the mechanical strength of the lubricant-containing polymer member of the present invention, the following thermoplastic resin and thermosetting resin may be added to the above polyolefin polymer.

As the thermoplastic resin, various resins such as polyamide, polycarbonate, polybutylene terephthalate, polyphenylene sulfide, polyether sulfone, polyether ether ketone, polyamide imide, polystyrene and ABS resin can be used. As the thermosetting resin, unsaturated polyester resin, urea resin, melamine resin, phenol resin, polyimide resin,
Each resin such as an epoxy resin can be used.

These resins may be used alone or as a mixture. Further, in order to disperse the polyolefin-based polymer and the other resin in a more uniform state, an appropriate compatibilizer may be added, if necessary. A metal such as steel or aluminum can be used as the reinforcing member of the sealing device in the linear guide device of the present invention. Lightweight aluminum is preferred. Alternatively, a non-metallic plastic material can be used. In that case, it is selected from materials having relatively high strength such as polyphenylene sulfide (PPS), polyamide (PA), polyacetal (polyoxymethylene POM), polyethylene (PE), polypropylene (PP),
Further, it may be reinforced by mixing it with glass fiber or the like. In terms of cost, injection-moldable plastic materials are more advantageous than metals, and are also suitable for weight reduction.

Next, an outline of the method of manufacturing the sealing device of the present invention will be described. First, the reinforcing member is formed. If it is a metal reinforcing member, it is formed into a predetermined shape by, for example, punching by pressing or machining. In the case of a plastic reinforcing member, it is preferable to manufacture it by injection molding into a predetermined shape. Next, the reinforcing member is mounted in the injection molding die for manufacturing the final product of the sealing device, the die is closed, and the heat-melted lubricant-containing polymer member is injected into the cavity to be cooled and solidified. The reinforcing member and the lubricant-containing polymer member are integrally molded and joined together. In this case, since the lubricant-containing polymer member is a material containing a large amount of lubricant, it is difficult to firmly join with a simple flat plate reinforcing member and easily separated. Therefore, the reinforcing member of the present invention is provided with an engaging portion composed of a combination of irregularities on the joint surface with the lubricant-containing polymer member in advance.

As the concave shape of the engaging portion, there are, for example, a T-shaped groove, a dovetail groove having a dovetail joint structure, a through hole, and the like. It constitutes a stop structure. It is assumed that the engaging portion formed of a combination of these concavities and convexities is provided at least at two or more places on the joint surface, and either the concave shape or the convex shape is formed beforehand on the joint surface of the auxiliary plate.

Specific examples thereof include the following three types. At least two places on the joint surface of the reinforcing member with the lubricant-containing polymer member, at the back (the contact surface side with the slider) from the entrance (joint surface) of the T-shaped groove, dovetail groove, tapered through hole, etc. Pre-form one of the concave shapes that has become larger. On the joint surface of the reinforcing member with the lubricant-containing polymer member, at least two convex shapes such as T-shape and dovetail shape are formed in advance.

At least two through holes are formed in the joint surface of the reinforcing member with the lubricant-containing polymer member. In the above-mentioned reinforcing member, the lubricant-containing polymer member is integrally molded on the joint surface, so that the lubricant-containing polymer member is filled in the concave shape to form an engaging portion in which irregularities are combined, and the retaining member is prevented from coming off. It

The reinforcing member of (1) is integrally formed with a lubricant-containing polymer member on its joint surface to form an engaging portion in which convex and convex portions are wrapped with the lubricant-containing polymer member to form a combination of protrusions and recesses, and the reinforcing member is prevented from coming off. It The front and back surfaces of the reinforcing member are joint surfaces. That is, by placing the reinforcing member in the substantially central portion of the cavity in the mold and injecting the lubricant-containing polymer member into the spaces on both sides of the cavity for integral molding, the through-hole is also filled with the lubricant-containing polymer member. As a result, an engaging portion is formed by combining the concave and convex portions, and the reinforcing member is sandwiched between the lubricant-containing polymer members on both sides to prevent the reinforcing member from coming off.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those in the conventional case are designated by the same reference numerals. FIG. 1 is an overall perspective view of a linear guide device equipped with a sealing device 40 of the present invention, and FIG. 2 is its end cap 2B.
And FIG. 3 is a rear view of the end cap 2B.

As shown in the drawing, a slider 2 having a substantially U-shaped cross section is mounted on a rectangular guide rail 1 so as to be relatively movable in the axial direction. End caps 2B are detachably fixed to both ends of the main body 2A of the slider 2 in the axial direction. In the case of this embodiment, the upper surface 1a of the guide rail 1
One rolling element rolling groove 13 consisting of an axially concave groove having a substantially 1/4 circular arc shape in cross section is formed at the ridge line where both side surfaces 1b intersect with each other, and a cross section is formed at an intermediate position between both side surfaces 1b of the guide rail. The other rolling element rolling groove 3 having a substantially semicircular shape is formed. At the groove bottom of the rolling element rolling groove 3, there is formed an escape groove 16 of the cage 14 which prevents the rolling element B from falling off when the slider 2 is not assembled to the guide rail 1.

On the other hand, at the inner corners of the sleeves 4 of the main body 2A of the slider 2, the load rolling elements having a substantially semicircular cross section facing the one rolling element rolling groove 13 of the guide rail 1 are rolled. A groove 18 is formed, and a load rolling element rolling groove 19 having a substantially semicircular cross section is formed at the center of the inner surface of the slider sleeve portion 4 so as to face the other rolling element rolling groove 3 of the guide rail 1.
The rolling element rolling groove 13 of the guide rail and the load rolling element rolling groove 18 of the slider constitute a load rolling element rolling path 21, and the rolling rail rolling groove 3 of the guide rail and the load rolling element rolling of the slider are formed. A load rolling element rolling path 22 is configured with the moving groove 19.

Further, a rolling element return path 23 consisting of a through hole having a circular cross section in the axial direction parallel to the load rolling element rolling groove 18 is formed on the upper part of the thick sleeve portion 4 of the slider body 2A, In the lower part of the portion 4, a rolling element return passage 24 formed of a similar axial through hole parallel to the rolling element rolling groove 3 is formed. Two
Reference numeral 5 is a screw hole for attaching the end cap 2B. The end cap 2B is an injection-molded product made of a synthetic resin material, and has a substantially U-shaped cross section. Then, the slider body 2A
As shown in FIG. 3, the abutting surface (rear surface) 2B _b with the upper concave portion 31 and the lower concave portion 3 in the shape of a semicircle that are obliquely inclined to both sleeve portions.
2 are formed on the upper and lower sides, and each semicircular concave portion 31,
A semi-cylindrical concave groove 33 is provided across the central portion of 32. By fitting a semi-cylindrical return guide (not shown) into the semi-cylindrical concave groove 33, a semi-doughnut-shaped curved path is formed in upper and lower two stages on the back surface of the end cap 2B. The end cap 2B is attached to the slider main body 2A, and the load rolling element rolling groove 18 of the slider main body 2A and the rolling element return path 23 are communicated with each other through the semi-doughnut-shaped curved path. The lower rolling element rolling groove 19 and the rolling element return path 24 are also made to communicate in the same manner.

The load rolling element rolling groove 18 (19), the rolling element return path 23 (24) and the curved paths at both ends thereof constitute an infinite rolling element rolling path, and a large number of rolling elements B are provided in the path.
Is rotatably inserted. Next, a seal device for sealing the openings on both sides of the gap between the slider 2 and the guide rail 1 of the above linear guide device will be described.

FIGS. 4 to 7 show a first embodiment of a side seal which is the sealing device. FIG. 4 is a front view, FIG. 5 is a rear surface (mounting surface to the slider 2), and FIG. 6 is a sectional view taken along line VI-VI in FIG. 4, and FIG. 7 is a sectional view taken along line VII-VII in FIG. The side seal 40 shown in the drawing has a thick lubricant-containing polymer composed of a polyolefin-based polymer and a lubricant on the outer surface of a substantially U-shaped thin metal or plastic reinforcing member 41 conforming to the outer shape of the end cap 2B. The member 42 is integrally formed and fixed. The lubricant-containing polymer member 42 of this example was 21% by weight of low molecular weight polyethylene (PZ50U, manufactured by Mitsubishi Petrochemical) and ultra high molecular weight polyethylene (Miperon XM220, manufactured by Mitsui Petrochemical).
Polyethylene consisting of 9% by weight, containing 70% by weight of paraffinic mineral oil (made by Nippon Oil Co., Ltd., FBK RO100) as a lubricant, was used as a raw material, which was once plasticized (dissolved) using an injection molding machine. It is molded by pouring into a predetermined mold, cooling and solidifying while applying pressure. At the time of molding, the reinforcing member 41 was previously inserted into the mold and insert-molded to be integrated with the lubricant-containing polymer member 42.

In the reinforcing member 41, the inner peripheral surface 41a has the same shape as the cross-sectional outer shape of the guide rail 1, the front surface 41b is a joint surface with the lubricant-containing polymer member 42, and the rear surface 41c is in contact with the end cap 2B. It is a face. Two through holes 44 for mounting screws 43 (FIG. 1) to the end cap 2B and one grease nipple mounting hole 45 are provided on the substantially U-shaped plate surface.

Further, on the inner peripheral portion of the surface 41b of the reinforcing member 41, there are formed a plurality of convex portions 46 (three in the figure) which constitute engaging portions with the lubricant-containing polymer member 42. There is. As shown in FIG. 7, the convex portion 46 of this embodiment has a dovetail shape in a dovetail joint structure and is provided so as to project from the surface 41b. The lubricant-containing polymer member 42 is a substantially U-shaped member having a size that borders the inner periphery of the reinforcing member 41, and the inner peripheral surface 42 a is a seal portion (seal lip) in sliding contact with the surface to be sealed of the guide rail 1. That is, the inner peripheral surface 42a has a shape capable of sliding contact with the upper surface 1a and the outer surface 1b which are the sealed surfaces of the guide rail 1 in accordance with the cross-sectional shape of the guide rail 1, and the inner peripheral surface 41a of the reinforcing member 41. It is formed to have a size that extends slightly inward. Further, inward groove sliding protrusions 42b and 42c are formed so as to match the groove shape so as to slidably contact the two rolling element rolling grooves 3 and 13 on one side of the guide rail 1 toward the inside. There is.

Reinforcing member 41 for polymer member 42 containing lubricant
The joining surface 42d with the reinforcing member 4 is provided at the time of insert molding.
A dovetail groove-shaped recess 47 is formed surrounding and engaged with the first projection 46 (present). By interposing the engaging portion A composed of the combination of the irregularities, both the reinforcing member 11 and the lubricant-containing polymer member 42 are firmly joined together without being separated.

Next, the operation will be described. The side seal 40 is mounted by passing the mounting screw 43 through the screw through hole 44 of the reinforcing member 41 and the screw through hole of the end cap 2B and screwing the screw 43 into the screw hole 25 on the end surface of the slider body 2A. By tightening the mounting screw, a strong tightening force acts on the reinforcing member 41 of the side seal 40, but it is integrally molded on the inner peripheral edge of the reinforcing member 41 and is fixed to a position inside the screw through hole 44. No screw tightening force acts on the lubricant-containing polymer member 42. Therefore, by tightening the mounting screw 43,
The lubricant-containing polymer member 42 will not be deformed or cracked, or problems such as leaching of the contained lubricant early will not occur.

The side seals 40 are attached to the front and rear end surfaces of the slider 2, respectively. Lubricant-containing polymer member 42 forming the seal lip portion of the side seal 40
The inner peripheral surface 42 a of the guide rail 1 is in close contact with the side surface 1 b of the guide rail 1, the groove surfaces of the ball rolling grooves 3 and 13 thereof, and the upper surface 1 a of the guide rail 1. Thus, the guide rail 1 and the slider 2
Since the openings in the front and rear of the gap of the facing surface of the slider 2 are sealed, it is possible to completely prevent the intrusion of dust from the front and rear of the slider 2.

In this state, for example, when the slider 2 is moved in the axial direction with respect to the guide rail 1, the inner peripheral surface 42a of the lubricant-containing polymer member 42 slides in close contact with the outer surface of the guide rail 1. At that time, the lubricant in the lubricant-containing polymer member 42 gradually exudes from the inner peripheral surface 42a and is automatically and uniformly supplied to the surface of the rolling element B via the outer surface of the guide rail 1. Therefore, stable lubrication is performed over a long period of time.

The inner peripheral surface 4 of the lubricant-containing polymer member 42.
2a only slightly protrudes inward from the inner peripheral surface 41a of the reinforcing member 41 and is backed up by the integrated reinforcing member 41. Therefore, the lubricant 2a has low hardness and strength even during continuous operation for a long time. There is no possibility that the seal portion of the contained polymer member 42 is damaged or cracked. In this example, the grease nipple is normally closed with a blind plug,
A lubricant such as grease may be supplied into the slider 2 by opening it at an appropriate time.

8 to 11 show a second embodiment of the sealing device. In the side seal 50 of the second embodiment, engaging portions A with the lubricant-containing polymer member 42 are provided at a plurality of locations (for example, locations of the protrusions 46 in the first embodiment) of the inner peripheral portion of the reinforcing member 41. It differs from the first embodiment in that a tapered through hole 51 is formed as a concave portion to be formed. As shown in FIG. 11, the through hole 51 has an inner diameter gradually increasing from the front surface 41b to the back surface 41c of the reinforcing member 41, and the lubricant-containing polymer member 42 does not enter the through hole 51 during insert molding. Thus, the convex portion 52 is formed.
By interposing the engaging portion A composed of the combination of the irregularities, both the reinforcing member 41 and the lubricant-containing polymer member 42 are firmly joined together without being separated. According to the engaging part A of this embodiment, it is only necessary to provide the tapered through hole 51 in the reinforcing member 41, and there is an advantage that processing becomes easy.

Other functions and effects are similar to those of the first embodiment. In addition, as the concave portion, the tapered through hole 51 is used.
However, the groove may be a dovetail groove, a T-shaped groove, or the like,
What is essential is that the back surface 41c side of the reinforcing member 41 is enlarged more than the front surface 41b side thereof so as to prevent it from coming off. In that case, the shape of the convex portion 52 made of the lubricant-containing polymer member that engages with the concave portion also necessarily corresponds to the concave shape.

12 to 16 show a third embodiment of the sealing device. The side seal 60 of the third embodiment has a straight through hole whose inner diameter does not change in the axial direction at a plurality of locations on the inner peripheral portion of the reinforcing member 41 (for example, the locations of the tapered through hole 51 in the second embodiment). 61 is formed as a concave portion that constitutes the engaging portion A, and a through hole 61 is filled with a lubricant-containing polymer by insert molding to form a convex portion 62. At the same time, the lubricant-containing polymer is formed on both front and back surfaces of the reinforcing member 41. This is different from the above-described embodiments in that the member 42 is integrally molded and the reinforcing member 41 is sandwiched between the lubricant-containing polymer members 42. Through hole 6
The reinforcing member 41 is sandwiched between the lubricant-containing polymer members 42 on the front and back sides via the engaging portion A formed by the combination of the protrusion 1 and the convex portion 62 filled in the reinforcing member 41 and the lubricant-containing polymer member 42. Both members are firmly joined together without separation.

According to the engaging portion A of this embodiment, there is an advantage that a strong integral connection can be obtained only by providing the through hole 61 in the reinforcing member 41. Other functions and effects are similar to those of the first embodiment. The linear guide device to which the sealing device of the present invention can be applied may be of any type as long as the slider is mounted over the guide rail.
For example, in the above-mentioned embodiment, the ball rolling groove 3 has two rows on one side, but one row on one side or more than two rows can be applied in the same manner. In that case, it goes without saying that the groove sliding protrusion of the sealing device is also formed in accordance with the ball rolling groove.

Although the case where the balls are used as the rolling elements has been described, the invention can be applied to the case where the rollers are used.

[0040]

As described above, in the linear guide sealing device of the present invention, the joint surface between the lubricant-containing polymer member and the reinforcing member is provided with the engaging portion formed by the combination of the concavities and convexities so that the both are integrated. Since it is molded, it can be firmly integrated without using an adhesive, and even if the seal device is mounted on the slider of the linear guide device and continuously run, lubricity with low hardness and strength etc. It is possible to maintain the sealing function for a long period of time without causing cracks or damage to the agent-containing polymer member.

Further, since the lubricant-containing polymer member is integrated with the reinforcing member via the engaging portion, the reinforcing member and the lubricant-containing polymer member can be joined securely, and the linear guide device can be mounted with high strength. The effect is that it is only necessary to screw high-strength reinforcing members, and as a result, problems such as deformation and damage of the lubricant-containing polymer member due to tightening of the mounting screws and bleeding of the lubricant-containing agent at an early stage can be completely prevented. Play.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a liania guide device including a sealing device of the present invention.

FIG. 2 is a front view of the linear guide device of FIG. 1 with an end cap removed.

3 is a rear view of an end cap of the linear guide device of FIG. 1. FIG.

FIG. 4 is a front view of the first embodiment of the sealing device of the present invention.

FIG. 5 is a rear view of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a front view of a second embodiment of the sealing device of the present invention.

FIG. 9 is a rear view of FIG.

10 is a cross-sectional view taken along line XX of FIG.

11 is a sectional view taken along line XI-XI of FIG.

FIG. 12 is a front view of a third embodiment of the sealing device of the present invention.

FIG. 13 is a front view in which a part of what is shown in FIG. 12 is removed.

FIG. 14 is a rear view of FIG.

15 is a sectional view taken along line XV-XV in FIG.

16 is a sectional view taken along line XVI-XV of FIG.

FIG. 17 is an overall perspective view of a linear guide device including a conventional sealing device.

FIG. 18 is a perspective view showing the lower surface side of the one shown in FIG.

[Explanation of symbols]

 1 guide rail 2 slider 3 rolling element rolling groove 5 rolling element rolling groove 6 rolling element 7 rolling element return passage 8 curved path 21 sealing device 22 seal reinforcing member 23 seal body 31 sealing device 32 seal reinforcing member 33 seal body

Claims (1)

[Claims] 1. A guide rail having an axial rolling element rolling groove, a rolling element rolling groove facing the rolling element rolling groove of the guide rail, and a rolling element return passage parallel to the groove, A linear guide including a slider that has a curved path that communicates this passage with the groove and that is relatively moved by being guided by the guide rail by the rolling of a large number of rolling elements that roll in the opposing rolling element rolling grooves. A sealing device of a linear guide device, which is attached to the slider of the device and seals a gap between an inner surface of the slider and an outer surface of the guide rail, wherein the sealing device is made of a polyolefin-based polymer containing a lubricant in advance. A lubricant-containing polymer member having a seal portion formed in sliding contact with the surface to be sealed, and a reinforcing member that is integrally bonded to the seal member. The reinforcing member and the lubricant-containing polymer member are Sealing system for a linear guide device, characterized in that are integrally formed through the engaging portion consisting of a combination of convex.