JPH0925933A - Linear guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at elongation of service life of a seal device by automatically supplying lubricant to the lip part of the seal device. SOLUTION: A reinforcing plate 42, a polymer member 41 including lubricant and a side seal 40 are fixed in their stacked state, to more outside of end cap 2B fixed to both end parts in the axial direction of the main body 2A of a slider 2. The reinforcing plate 42 is a steel plate formed in an approximately one-side opened square column shape matching the external shape of the end cap 2B. And a polymer member 41 including lubricant sandwiched between the side seal 40 and the reinforcing plate 42 is a member formed in approximately one-side opened square column shape matching the external shape of the end cap 2B and its inside surface is in contact with or in no contact with the upper surface 1a and the outer surface 1b of a guide rail 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear guide device, and in particular, it is possible to extend the life of the seal device by automatically supplying a lubricant to the lip portion of the seal device. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as a generally used linear guide device, for example, as shown in FIG. 7, there is a guide rail 1 which has a rolling element rolling groove 3 on its outer surface and extends in the axial direction, and its guide. It is known that the slider 2 is mounted so as to straddle the rail 1. Slider 2 is slider body 2A
And the end caps 2B attached to both ends thereof, the slider body 2A has rolling element rolling grooves (not shown) facing the rolling element rolling grooves 3 of the guide rail 1 on the inner side surfaces of the sleeves 4. The rolling element return path (not shown) 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) for connecting the rolling element rolling groove of the slider body 2A and a rolling element return path parallel thereto, and the rolling element rolling groove and the rolling element return path are provided. The path and the curved paths at both ends form a circulating circuit for the rolling elements. A large number of rolling elements made of, for example, steel balls are loaded in a circulation circuit of the rolling elements.

[0003] The slider 2 assembled on the guide rail 1
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. 8, 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 in a gap between the slider 2 and the guide rail 1. An under seal 6 is attached to the lower surface. These conventional seals are generally made of rubber such as NBR (acrylonitrile butadiene rubber). In the figure, 7 is a grease nipple.

[0004]

However, the conventional linear guide device as described above has the following problems. That is, the slider 2 along the guide rail 1
As the amount of grease loaded inside the slider 2 decreases as the vehicle travels, poor lubrication occurs between the lip portions of the side seals 5 and the under seal 6 and the guide rails 1, and the lip portions gradually disappear. Will wear out. Then, due to such progress of wear, the sealing property is deteriorated, and foreign matter such as cutting powder enters the inside of the slider 2, which may cause seizure of the linear guide device itself.

Further, the rolling element rolling groove 3 of the guide rail 1 is
Since grease is supplied through the rolling elements as the slider 2 travels, the wear of the lip portion in contact with the rolling element rolling grooves 3 is relatively small, while the rolling elements are not worn. For example, a portion that is not supplied with grease via the rail and is in contact with the upper surface of the rail is likely to cause poor lubrication, which causes abrasion and damage to the lip portion, which may also cause seizure of the linear guide device itself.

The present invention has been made by paying attention to the unsolved problem of the conventional technique, and enables the lubricant to be supplied to the lip portion directly or via the guide rail. An object of the present invention is to provide a linear guide device which can reduce wear of the sealing device and can maintain the sealing property for a long period of time.

[0007]

To achieve the above object, the invention according to claim 1 is characterized in that a slider is loosely fitted to a guide rail that has a rolling element rolling groove on the outer surface and extends in the axial direction. The slider is a rolling element circulation path including a load rolling element rolling groove facing the rolling element rolling groove of the guide rail and a rolling element return path connected to both ends of the load rolling element rolling groove via curved paths. A plurality of rolling elements for relatively moving the slider along the guide rail are loaded in the rolling element circulation path, and an opening in a gap between the slider and the guide rail is sealed on both end surfaces of the slider. In a linear guide device including a sealing device, a lubricant containing a synthetic resin containing a lubricant is formed on the end surface side of the slider, in the vicinity of a lip portion that contacts the guide rail of the sealing device. Poly The member is disposed.

According to a second aspect of the invention, in the linear guide device according to the first aspect of the invention, at least a portion of the inner peripheral surface of the lubricant-containing polymer member contacts the outer peripheral surface of the guide rail. I did it. The invention according to claim 3 is the linear guide device according to claim 1 or 2, wherein the sealing device is formed of polyurethane rubber cured in a state of containing grease.

In the invention according to claim 1, the lubricant that exudes gradually from the lubricant-containing polymer member with time is arranged such that the lubricant-containing polymer member is close to the lip portion of the sealing device. Therefore, it is easily supplied to the lip portion, and the lubrication of the lip portion is stably performed for a long period of time. When the inner peripheral surface of the lubricant-containing polymer member is in contact with at least a part of the outer peripheral surface of the guide rail as in the invention according to claim 2, the guide rail is used to Also, since the lubricant is supplied to the lip, the supply of the lubricant to the lip is extremely stable. Therefore, wear of the lip portion is minimized, and the sealing performance of the sealing device is maintained for a long period of time.

The lubricant exuded from the lubricant-containing polymer member is also supplied to the rolling elements via the guide rails. Therefore, for example, even if the grease disappears for some reason, the lubricant of the linear guide device itself. Will also work as. In particular, when the lubricant-containing polymer member is arranged so as to be sandwiched between the slider end surface and the seal device, conventionally, the grease is leaked to the outside due to the usual reciprocating movement of the slider causing the lip portion of the seal device to roll up. On the other hand, since the lubricant-containing polymer member is sandwiched, it is difficult to roll it up, so that leakage of grease to the outside is reduced.

According to the third aspect of the invention, since the polyurethane rubber containing the grease acting as a lubricant serves as the seal device, the lubricant can be supplied also from the seal device. In combination with the action of the invention according to claim 1 or claim 2, wear of the lip portion of the sealing device is further reduced. Hereinafter, the material of the lubricant-containing polymer member of the present invention will be described in detail.

The lubricant-containing polymer member of the present invention comprises a synthetic resin selected from the group of polyolefin resins having basically the same chemical structure such as polyethylene, polypropylene, polybutylene, and polymethylpentene, and poly-α- Paraffinic hydrocarbon oils such as olefin oils,
Injection molding of raw materials prepared by mixing any of naphthenic hydrocarbon oils, mineral oils, ether oils such as dialkyldiphenyl ether oils, ester oils such as phthalate esters, etc. alone or in the form of a mixed oil. Therefore, various additives such as an antioxidant, a rust preventive, an antiwear agent, a defoaming agent and an extreme pressure agent may be added to the lubricant in advance.

The composition ratio of the lubricant-containing polymer member is 20 to 80% by weight of the polyolefin resin with respect to the total weight.
The lubricant is 80 to 20% by weight. When the content of the polyolefin resin is less than 20% by weight, hardness and strength at a certain level or higher cannot be obtained. In addition, the polyolefin resin is 80
When it exceeds the weight% (that is, when the lubricant is less than 20% by weight), the supply of the lubricant is reduced and the effect of reducing the wear of the lip portion of the sealing device is reduced.

The groups of the above synthetic resins 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 resin.

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 resin and the other resin in a more uniform state, a suitable compatibilizing agent may be added if necessary. In addition, a filler may be added to improve mechanical strength.
For example, calcium carbonate, magnesium carbonate, inorganic whiskers such as potassium titanate whiskers and aluminum borate whiskers, or glass fibers and asbestos,
Inorganic fibers such as metal fibers and those obtained by braiding these into a cloth shape, and as an organic compound, carbon black, graphite powder, carbon fibers, aramid fibers, polyester fibers or the like may be added.

Further, for the purpose of preventing deterioration of the polyolefin resin due to heat, aging of N, N'-diphenyl-P-phenylenediamine, 2,2'-methylenebis (4-ethyl-6-t-butylphenol), etc. 2-hydroxy-4-n for the purpose of preventing deterioration by light and deterioration due to light.
-Octoxybenzophenone, 2- (2'-hydroxy-3'-tert-butyl-5'-methyl-phenyl) -5
An ultraviolet absorber such as chlorobenzotriazole may be added.

The addition amount of all of the above additives (other than polyfrefin + oil) is preferably 20% by weight or less of the total amount of the forming raw materials in order to maintain the lubricant supplying ability. . Next, the polyurethane rubber cured in the state of containing the grease, which can be used as the sealing device of the present invention, will be described in detail.

Polyurethane rubber is a compound formed by the reaction of a polyisocyanate and an active hydrogen compound. As the polyisocyanate, tolylene diisocyanate, hexamethylene diisocyanate and the like can be used. Examples of the active hydrogen compound include hydrocarbons such as polybutadiene, polyethers such as polyoxypropylene, long chain active hydrogen compounds such as castor oil, polyester and polycarbonate, water, polyhydroxy compounds such as ethylene glycol, amino alcohols, polyamino compounds and the like. Short chain active hydrogen compounds can be used.

As the grease, ordinary grease such as mineral oil lithium soap grease can be used.

[0021]

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. First, the overall structure of the linear guide device according to the present embodiment will be described. In FIGS. 1 and 2, a slider 2 having a substantially U-shaped transverse 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, one rolling element rolling groove 13 formed of an axial concave groove having a substantially 1/4 circular arc shape in cross section is formed at the ridge portion where the upper surface 1a and both side surfaces 1b of the guide rail 1 intersect. In addition, the other rolling element rolling groove 3 having a substantially semicircular cross section is formed at an intermediate position on both side surfaces 1b of the guide rail. A cage 14 is provided at the groove bottom of the rolling element rolling groove 3 to prevent the rolling element B from falling off when the slider 2 is not assembled to the guide rail 1.
The escape groove 16 is formed.

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 portion 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. A reinforcing plate 42, a lubricant-containing polymer member 41, and a side seal 40 are provided outside the end caps 2B fixed to both axial ends of the main body 2A of the slider 2 from the side close to the end caps 2B. , It is fixed in a superposed state.

Of these, the side seal 40 is a member formed by welding polyurethane rubber with grease contained in a substantially U-shaped steel plate matching the outer shape of the end cap 2B, or a member obtained by bonding NBR rubber and a steel plate. The inner surface of the U-shape has an upper surface 1a and an outer surface 1b of the guide rail 1 according to the cross-sectional shape of the guide rail 1 so as to seal the gap between the slider 2 and the guide rail 1. It has a shape that allows sliding contact with. However, the inner surface of the side seal 40 is slightly smaller (about 0.1 to 0.2 mm) than the dimension in contact with the surface of the guide rail 1 in order to reliably seal the gap between the side seal 40 and the guide rail 1. It has such dimensions.

The reinforcing plate 42 is also the end cap 2B.
It is a substantially U-shaped steel plate that conforms to the outer shape of. However,
The reinforcing plate 42 is not in contact with the guide rail 1. The lubricant-containing polymer member 41 sandwiched between the side seal 40 and the reinforcing plate 42 is also a substantially U-shaped member matching the outer shape of the end cap 2B as shown in the perspective view of FIG. The inner surface of the U-shape, like the inner surface of the side seal 40, can be in non-contact or at least partially slidable with the upper surface 1a and the outer surface 1b of the guide rail 1 in accordance with the cross-sectional shape of the guide rail 1. It has a unique shape.

Further, the lubricant-containing polymer member 41 has a through hole 41 through which a mounting screw penetrates when being fixed to the main body 2A.
a, 41b and a through hole 41 for mounting the grease nipple 7
c are formed, and through holes 41a, 41b and 41 are formed.
c is a tubular sleeve 41A, 41 as shown in FIG.
B and 41C are fitted, and the grease nipple 7 penetrates the inside of the sleeve 41C. The length L of these sleeves 41A, 41B, 41C
₂ is made equal to the thickness L ₁ of the lubricant-containing polymer member 41 or slightly longer (about 0.2 mm).

The outer diameters of the sleeves 41A and 41B are determined by the through holes 40a and 40b of the side seal 40 and the reinforcing plate 4.
It is made larger than the two through holes 42a and 42b. By doing so, when the lubricant-containing polymer member 41 is sandwiched between the side seal 40 and the reinforcing plate 42 and tightened with the mounting screws 43a and 43b, the pressing force is not applied to the lubricant-containing polymer member 41. The self-shrinking action of the lubricant-containing polymer member 41 is not hindered.

The side seal 40, the lubricant-containing polymer member 41, and the reinforcing plate 42 are attached to the mounting screw 4 as shown in FIG. 6, which is a perspective view showing the assembled state.
3a and 43b through the through holes 40a and 40b for screws of the side seal 40, the through holes 41a and 41b for screws of the lubricant-containing polymer member 41, and the through holes 42a and 42b for screws of the reinforcing plate 42. , Is integrally screwed to the main body 2A together with the end cap 2B. In addition, 40c is a through hole for attaching the grease nipple 7 formed in the side seal 40, and 42c is a through hole for attaching the grease nipple 7 formed in the reinforcing plate 42.

Next, the operation of the present embodiment will be described. That is, the side seal 40 allows the guide rail 1 and the slider 2 to be
Since the openings in the front and rear of the gap of the opposing surface are sealed, it is possible to completely prevent the intrusion of dust from the front and rear of the slider 2 unless the side seal 40 is worn. Then, when the slider 2 moves on the guide rail 1 fixed to the machine base, the rolling element B moves to the load rolling element rolling path 21 (2
2) The slider 2 moves in the moving direction of the slider 2 while rolling inside.
It moves at a slower speed, makes a U-turn on the curved path on one end side, moves while rolling on the rolling element return path 23 (24) in the opposite direction, and makes a reverse U-turn on the curved path on the other end side to load-roll. The circulation returning to the inside of the moving body rolling path 21 (22) is repeated.

When the linear guide device is driven in this manner, the lubricant-containing polymer member 41 also moves while not contacting or in contact with the guide rail 1, and the lubricant-containing polymer member 41.
The lubricant gradually exudes from the base material over time. The exuded lubricant is applied to the lip portion of the side seal 40 (that is, the inner surface of the side seal 40 that contacts the guide rail 1) of the lubricant-containing polymer member 41. Since they are arranged close to each other, the lip portion of the side seal 40 is stably lubricated for a long period of time. Further, in the case where the lubricant-containing polymer member 41 is in contact with the guide rail 1, the lubricant can be supplied to the lip portion of the side seal 40 through the surface of the guide rail 1, so that the lip can be supplied. The supply of lubricant to the parts is carried out in a particularly stable manner.

Therefore, since the wear of the lip portion of the side seal 40 is minimized, the sealing performance of the side seal 40 is maintained for a long period of time, foreign matter is prevented from entering the main body 2A side, and the linear guide device itself is prevented. The life can be extended. In addition, the lubricant exuded from the lubricant-containing polymer member 41 rolls in the rolling element rolling grooves 3 and 13 of the guide rail 1, particularly in the rolling element rolling grooves 3 and 13. Automatically supplied to. Due to this self-lubricating property, stable and smooth operation is performed for a long time. Therefore, good operation can be continued for a long time at a low torque without supplying a lubricant to the slider 2 from outside.

Further, in the case where the lubricant-containing polymer member 41 is in contact with the guide rail 1, as the lubricant exudes from the lubricant-containing polymer member 41, the lubricant-containing polymer member 41 itself contracts. Therefore, the lubricant-containing polymer member 41 is also brought into close contact with the surface to be sealed of the guide rail 1 due to the contracting force, and the action of performing the sealing function and the lubricating function is also obtained.

Further, when the side seal 40 is made of polyurethane rubber which is hardened in the state of containing grease, the lubricant is supplied from itself, and the wear of the lip portion of the side seal 40 is further reduced. . Further, since the lubricant-containing polymer member 41 is disposed so as to be sandwiched between the end cap 2B and the side seal 40 via the reinforcing plate 42, the slider 2 reciprocates at the lip portion of the side seal 40. Even if it is hard to roll up, grease inside the slider 2 is prevented from leaking to the outside.

If the structure is the same as that of this embodiment,
The grease nipple mounting hole may be closed with a blind plug,
A lubricant such as grease may be supplied to the inside of the slider by opening it as needed. Further, in the linear guide device of the present embodiment, the lubricant-containing polymer member 41 is fixed to the end surface of the end cap 2B while being sandwiched between the reinforcing plate 42 and the side seal 40.
The present invention is not limited to this. For example, as in FIG. 7, the side seal 40 is directly attached to the end surface of the end cap 2B, and two reinforcing plates are attached to the end surface of the end cap 2B to which the side seal 40 is attached. The lubricant-containing polymer member 41 sandwiched by 42 may be fixed, and even in such a configuration, the lubricant-containing polymer member 41 is disposed close to the lip portion of the side seal 40. If so, the same operational effect as that of the above-described embodiment can be obtained.

The linear guide device to which the present invention can be applied is not limited to the type of the above-described embodiment. For example, the load rolling element rolling groove may have a groove other than two threads on one side, or the rolling element Instead of the ball, it may be a roller.

[0037]

EXAMPLE Next, the linear guide device having the structure as in the above-mentioned embodiment will be explained with reference to a side seal wear test conducted by the present inventors with comparative examples. First, as a working example of the present invention, a linear guide device having the following structure and was manufactured, and as a comparative example, a linear guide device having the following structure was manufactured.

(Example): N as the side seal 40
As the lubricant-containing polymer member 41 using BR rubber,
Low molecular weight polyethylene (PZ50U, manufactured by Mitsubishi Yuka) 21
Polyethylene consisting of 9% by weight and ultrahigh molecular weight polyethylene (Mitsui Petrochemical, Miperon XM220),
Paraffinic mineral oil as a lubricant (made by Nippon Oil Co., Ltd., FBK
RO100) 70% by weight as a raw material,
After plasticizing (melting) this once using an injection molding machine,
It was used by pouring into a predetermined mold, cooling and solidifying while pressurizing and molding. Further, the lubricant-containing polymer member 41
The inner surface of the has a clearance of 0 to 0.1 with respect to the guide rail 1.
mm, and about 70% of the inner surface of the guide rail 1 is contacted.

Example: As the side seal 40,
The structure is the same as that of the above-described embodiment except that the grease-containing polyurethane rubber is used. As the grease-containing polyurethane rubber, a mixture of 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate as polyisocyanate (mixing ratio 65:35).
(Nippon Polyurethane Industry Co., Ltd., Coronate T-6
5) and polyester polyol as an active hydrogen compound (Nipporan 403, manufactured by Nippon Polyurethane Industry Co., Ltd.)
2) Compound produced by reaction with 2) and mineral oil lithium soap grease as grease (manufactured by Showa Shell Co.,
Albene grease No. 2) was mixed at a ratio of 1: 1 and the mixture was heated in an appropriate mold to be cured and integrated to be used.

(Example) As the side seal 40 and the lubricant-containing polymer member 41, the same ones as in the above-mentioned example were used. However, the lubricant-containing polymer member 41 was not in contact with the guide rail 1 (the gap between the inner surface of the lubricant-containing polymer member 41 and the outer surface of the guide rail 1 was 0.2 mm to 0.3 mm). The side seal 40 is directly attached to the end surface of the end cap 2B, and the lubricant-containing polymer member 41 sandwiched between the two reinforcing plates 42 is attached to the end surface of the end cap 2B to which the side seal 40 is attached. The following measurement was also performed on the fixed linear guide device under the same conditions as in this example, and it was confirmed that the same results as in this example were obtained.

(Comparative Example): N as the side seal 40
BR rubber was used and the lubricant-containing polymer member 41 was not used. And for each of the above
When the amount of wear of the lip portion of the side seal 40 was measured after traveling for 5000 km, the results shown in Table 1 below were obtained. The side seals 40 are attached to both ends of the linear guide device, but the measured wear amount is
The amount of wear per side seal 40 was taken.

[0042]

[Table 1]

As can be seen from the results of this experiment, the amount of wear of the side seal 40 can be remarkably reduced with the embodiments and the configurations within the scope of the present invention.
The sealing property can be maintained for a long period of time.

[0044]

As described above, according to the first aspect of the invention, the supply of the lubricant to the lip portion is performed very stably, the abrasion of the lip portion is suppressed to the minimum, and the sealing device is provided. Since the sealing property of No. 2 is maintained for a long period of time, foreign matter can be prevented from entering the inside of the linear guide apparatus, and the life of the linear guide apparatus itself can be extended.

Particularly, according to the invention of claim 2, the effect of the invention of claim 1 becomes more remarkable. Then, according to the invention of claim 3, the effect of the invention of claim 1 or 2 becomes more remarkable.

[Brief description of drawings]

FIG. 1 is a perspective view of a linear guide device according to an embodiment 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 perspective view of a lubricant-containing polymer member.

FIG. 5 is a perspective view of a sleeve inserted into a lubricant-containing polymer member.

FIG. 6 is a perspective view showing a mounting state of each member at the end portion of the linear guide device.

FIG. 7 is a perspective view of a conventional linear guide device.

8 is a perspective view showing a lower surface side of the linear guide device of FIG.

[Explanation of symbols]

 1 Guide rail 2 Slider 3 Rolling element rolling groove 13 Rolling element rolling groove 18 Load rolling element rolling groove 19 Load rolling element rolling groove 23 Rolling element return path 24 Rolling element return path 40 Side seal (seal device) 41 Lubrication Agent-containing polymer member 42 Reinforcing plate B Rolling element

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Soichiro Kato 78 Toba-cho, Maebashi-shi, Gunma Nippon Seiko Co., Ltd.

Claims (3)

[Claims] 1. A slider is loosely fitted to a guide rail that has a rolling element rolling groove on its outer surface and extends in an axial direction, and the slider is a load rolling element rolling groove that opposes the rolling element rolling groove of the guide rail. And a rolling element circulation path composed of rolling element return paths connected to both ends of the load rolling element rolling groove via curved paths,
A large number of rolling elements that relatively move the slider along the guide rails are loaded in the rolling element circulation path, and
In a linear guide device equipped with a seal device for sealing an opening in a gap between a slider and a guide rail on both end faces of the slider, a lip portion contacting the guide rail of the seal device is provided on an end face side of the slider. A linear guide device characterized in that a lubricant-containing polymer member formed by molding a synthetic resin containing a lubricant is disposed in the vicinity thereof. 2. The linear guide device according to claim 1, wherein at least a part of the inner peripheral surface of the lubricant-containing polymer member is in contact with the outer peripheral surface of the guide rail. 3. The linear guide device according to claim 1, wherein the sealing device is made of polyurethane rubber that is hardened in a state of containing grease.