JP2000356220A - Linear motion guide bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply a lubricant to rolling elements over a long period of time. SOLUTION: A reinforcing plate 10, a lubricant containing member 11 and a side seal 12 are fixed to the outer surface side of an end cap 2B in the superposed state from the closer side to the end cap 2B. The reinforcing plate 10 is an almost U-shaped steel plate formed in conformity to the outline of the end cap 2B and not in contact with a guide rail 1. The side seal 12 is composed of an almost U-shaped steel plate formed in conformity to the outline of the end cap 2B, and grease containing polyurethane rubber having similar shape to the steel plate and integrally formed on the outer surface of the steel plate. The side seal 12 further has lip parts 13 at the inner peripheral part. The lubricant containing member 11 is formed in almost U-shape conformed to the outline of the end cap 2B, and the inside face of the U-shape is shaped so as to come in sliding contact with an upper race 1a and outer side faces 1b of the guide rail 1 in conformity to the cross-sectional form of the guide rail 1 in the same way as the lip parts 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear guide bearing device, and more particularly to a linear guide bearing device capable of stably supplying a lubricant to rolling elements for a long period of time.

[0002]

2. Description of the Related Art As this kind of prior art, there has been proposed a first prior art disclosed in Japanese Patent Application Laid-Open No. Hei 6-346919, which was previously proposed by the present applicant, and also a prior art proposed by the present applicant. JP-A-7-35146 (second conventional example). That is, in the first conventional example, a seal device having a seal lip portion made of rubber or synthetic resin containing a lubricant between an outer surface of a guide rail and an inner surface of a slider that moves along the guide rail. The seal lip portion comes in contact with the outer surface of the guide rail to seal the opening between the inner surface of the slider and the outer surface of the guide rail. The seal lip of the seal device is formed of a lubricant-containing rubber or a synthetic resin, and the seal lip has a self-lubricating property, so that the lubricant contained in the seal itself gradually permeates. The seal lip portion is automatically supplied to the seal friction surface, and the wear and tear of the seal lip portion is suppressed.

In the second conventional example, a layer of rubber or synthetic resin and a layer of rubber or synthetic resin containing a lubricant are at least partially overlapped and integrally joined. A seal lip portion is formed on at least the lubricant-containing rubber or synthetic resin layer of the types of layers, in contact with the outer surface of the guide rail to seal the opening between the inner surface of the slider and the outer surface of the guide rail. I have. Even in the second conventional example, since the seal lip portion has self-lubricating properties, the lubricant contained in the seal itself gradually exudes and is automatically supplied to the seal friction surface. The effect of suppressing wear of the seal lip is obtained. In addition, since the above-described structure is obtained by laminating the layers, there is an advantage that the strength of the seal lip can be freely set according to the application or the like by appropriately selecting the number of layers and the thickness of each layer.

[0004]

In the first and second prior arts, the seal lip has a self-lubricating property. Although the function and effect of suppressing wear can be obtained, a ball that guides the movement of the slider of the linear motion guide bearing device when durability is particularly required only with the lubricant oozing out of the lubricant-containing rubber or synthetic resin. There is an unsolved problem that it is not enough to maintain even a smooth rolling motion of a rolling element such as a roller.

[0005] In the above-described first and second prior art lubricant-containing sealing devices, the seal lip portion is pressed against the guide rail only by the elastic force of the seal itself, so that it is not sufficient as a seal. However, there is a case where a sufficient pressing force cannot be obtained as a device for supplying the lubricant. The present invention has been made in view of such unresolved problems of the conventional technology, and constantly supplies a lubricant that can maintain a smooth rolling motion of a rolling element. It is an object of the present invention to provide a linear motion guide bearing device capable of performing the following.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a slider is loosely fitted to a guide rail extending in the axial direction having a rolling element rolling groove on an outer surface. The slider is a rolling element circulating path comprising 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 linear motion guide bearing device provided with a number of rolling elements for relatively moving the slider along the guide rails in the rolling element circulation path, wherein a lubricant-containing member made of a rubber or a synthetic resin containing a lubricant is provided. Is attached to the end of the slider between the end face of the slider and the plate-like member and at least a part of the lubricant-containing member is in contact with the guide rail.

According to a second aspect of the present invention, in the linear guide bearing device according to the first aspect of the present invention, another plate member is provided between the end face of the slider and the lubricant-containing member. I sandwiched it. According to a third aspect of the present invention, in the linear motion guide bearing device according to the first or second aspect, the deformation of the lubricant-containing member in a direction perpendicular to the axial direction of the guide rail is performed. It was decided to have attachment means that could be used.

According to a fourth aspect of the present invention, a slider is loosely fitted to an axially extending guide rail having a rolling element rolling groove on an outer surface, and the slider is fitted into the rolling element rolling groove of the guide rail. A rolling element circulating path comprising opposing load rolling element rolling grooves and rolling element return paths connected to both ends of the load rolling element rolling grooves via curved paths, wherein the rolling element circulating path includes the guide rail; In a linear motion guide bearing device loaded with a number of rolling elements for relatively moving the slider along, a lubricant-containing member made of rubber or synthetic resin containing a lubricant is attached to an end of the slider, There is provided an urging means for generating an urging force for pressing the lubricant-containing member against the guide rail while attaching the lubricating member to the guide rail.

According to a fifth aspect of the present invention, in the linear guide bearing device according to the fourth aspect of the present invention, another plate-shaped member is provided between the end face of the slider and the lubricant-containing member. I sandwiched it. Further, the invention according to claim 6 is
The linear motion guide bearing device according to the fourth or fifth aspect of the present invention, wherein the linear motion guide bearing device includes an attachment unit that enables the lubricant-containing member to be deformed in a direction perpendicular to an axial direction of the guide rail. And

Further, according to a seventh aspect of the present invention, in the linear motion guide bearing device according to any one of the fourth to sixth aspects, the lubricant-containing member is substantially crossed over the guide rail. In addition to the U-shape, with no external force applied to the lubricant-containing member, the bottom surface of the U-shaped concave portion of the lubricant-containing member was formed into an arc shape in which the central portion protruded from the sleeve side.

In the invention according to the first aspect, the lubricant-containing member is sandwiched between the slider end face and the plate-shaped member and is disposed in contact with the guide rail.
When moving along the guide rail integrally with the slider, the lubricant that gradually seeps out of the lubricant-containing member over time is reliably supplied to the guide rail, and the lubricant supplied to the guide rail is applied to the guide rail. It is supplied to the rolling elements through the surface and the rolling element rolling grooves.

In addition, since the lubricant-containing member itself is sandwiched between the slider end face and the plate-like member, unlike the case where the seal lip contains a lubricant, the rolling element can maintain the rolling for a long period of time. It is easy to make the size large enough to contain a sufficient amount of lubricant, and it is not necessary to attach a lubricant-containing member to a steel plate or the like, so that assembly is easy.

According to the second aspect of the present invention, since another plate-like member is sandwiched between the lubricant-containing member and the slider end face, the lubricant-containing member is formed by two plate-like members. The slider is attached to the end face of the slider while being sandwiched. And even with such a structure, the same operation as the invention according to claim 1 can be obtained. In the invention according to claim 3, since the lubricant-containing member is attached such that deformation in the direction perpendicular to the guide rail is permitted, even if the lubricant-containing member is worn, the lubricant-containing member is worn. Can always be brought into contact with the guide rail.

On the other hand, in the invention according to claim 4, since the lubricant-containing member is pressed against the guide rail by the urging force generated by the urging means, the lubricant-containing member is always in contact with the guide rail. Become like In addition, when the urging means generates an urging force, there is no gap between the guide rail and the lubricant-containing member even if there is some manufacturing error in the lubricant-containing member. Thus, the lubricant that has oozed out of the lubricant-containing member is stably supplied to the guide rail.

According to the fifth aspect of the present invention, since another plate-like member is sandwiched between the lubricant-containing member and the slider end face, the lubricant-containing member is formed by two plate-like members. The slider is attached to the end face of the slider while being sandwiched. And even with such a structure, the same operation as the invention according to claim 4 can be obtained. In the invention according to claim 6, since the lubricant-containing member is attached such that deformation in a direction orthogonal to the guide rail is allowed, even if the lubricant-containing member is worn, the lubricant-containing member is attached. Can always be brought into contact with the guide rail.

In the invention according to claim 7, the inner surfaces of the two U-shaped sleeve portions (the surfaces facing the side surfaces of the guide rail) of the lubricant-containing member are formed on the guide rail by the urging force generated by the urging means. The lubricant-containing member comes into contact with the guide rail at all times, and the bottom surface of the U-shaped concave portion of the lubricant-containing member has a predetermined arc shape, so that the lubrication is performed by the urging force of the urging means. Even if the agent-containing member is deformed in a direction in which both sleeve portions are pressed against the guide rail, the arc-shaped shape is close to a horizontal state, so that the lubricant-containing member stably contacts the guide rail.

Hereinafter, the material of the lubricant-containing member of the present invention will be described in detail. First, in the case of a lubricant-containing member in which a rubber is added to a lubricant, for example, a polyurethane rubber cured while containing grease can be used.
Polyurethane rubber is a compound formed by the reaction between a polyisocyanate and an active hydrogen compound. As the polyisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, or 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; Short chain active hydrogen compounds such as compounds can be used. As grease, ordinary grease such as mineral oil lithium soap grease can be used.

Next, when a lubricant is added to the synthetic resin to produce a lubricant-containing member, the lubricant-containing member has basically the same chemical structure as polyethylene, polypropylene, polybutylene, polymethylpentene, or the like. Synthetic resins selected from the group of polyolefin resins, as lubricants paraffinic hydrocarbon oils such as poly-α-olefin oils, naphthenic hydrocarbon oils, mineral oils, ether oils such as dialkyl diphenyl ether oils, phthalate esters Either of such ester oils or the like may be used alone or in the form of a mixed oil to prepare a raw material prepared by injection molding, and an antioxidant, a rust inhibitor,
Various additives such as an anti-wear agent, a defoaming agent and an extreme pressure agent may be added.

The composition ratio of the above-mentioned lubricant-containing member is 20 to 80% by weight of the polyolefin resin and 80 to 20% by weight of the lubricant based on the total weight. 20 polyolefin resins
When the amount is less than% by weight, a certain level or more of hardness, strength and the like cannot be obtained. 80% by weight of polyolefin resin
(That is, when the amount of 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 above synthetic resin groups have the same basic structure but different average molecular weights, from 1 × 10 ^{3 to} 5 × 10 ^6.
Range. Among them, average molecular weight 1 × 10
One having a relatively low molecular weight of ³ to 1 × 10 ⁶ and 1 × 1
0 ⁶ a to 5 × 10 ⁶ as those of ultra-high molecular weight, using a mixture according to either alone or in need. In order to improve the mechanical strength of the lubricant-containing member of the present invention, a thermoplastic resin and a thermosetting resin as described below may be added to the above-mentioned polyolefin resin.

As the thermoplastic resin, various resins such as polyamide, polycarbonate, polybutylene terephthalate, polyphenylene sulfide, polyether sulfone, polyether ether ketone, polyamide imide, polystyrene, ABS resin and the like can be used. Thermosetting resins include unsaturated polyester resins, urea resins, melamine resins, phenolic resins, polyimide resins,
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 compatibilizer may be added as necessary. Further, a filler may be added to improve the mechanical strength.
For example, calcium carbonate, magnesium carbonate, inorganic whiskers such as potassium titanate whiskers and aluminum borate whiskers, or glass fiber or asbestos,
Inorganic fibers such as metal fibers and those obtained by braiding them into a cloth shape, and in the case of organic compounds, carbon black, graphite powder, carbon fibers, aramid fibers, polyester fibers, and the like may be added.

Further, in order to prevent deterioration of the polyolefin resin due to heat, aging of N, N'-diphenyl-P-phenylenediamine, 2,2'-methylenebis (4-ethyl-6-t-butylphenol) and the like. For the purpose of preventing 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 polyolefin and oil) is preferably 20% by weight or less of the total amount of the forming raw material in order to maintain the lubricant supply capacity. .

[0026]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a first embodiment of the present invention.
It is a figure showing an embodiment. First, the structure will be described. As shown in FIG. 1 which is a perspective view of the linear motion guide bearing device of the present embodiment, the rolling element rolling grooves 3A and 3B are formed on the outer surface.
And a guide rail 1 extending in the axial direction and a slider 2 assembled across the guide rail 1.

More specifically, one of the rolling element rolling grooves 3A formed of axially concave grooves having a substantially arc-shaped cross section is formed at the ridge line where the upper surface 1a and both side surfaces 1b of the guide rail 1 intersect. At the same time, the other rolling element rolling groove 3B having a substantially semicircular cross section is formed at an intermediate position between both side surfaces 1b of the guide rail. At the bottom of the rolling element rolling groove 3B, an escape groove 3a of a retainer for preventing the rolling element from falling off when the slider 2 is not assembled to the guide rail 1 is formed.

On the other hand, the slider 2 comprises a slider main body 2A and end caps 2B attached to both ends of the slider main body. The slider main body 2A is provided on the inner side surfaces of both sleeves 4 with rolling element rolling grooves 3A, 3B, a rolling element rolling groove (not shown) facing the rolling element and a rolling element return path axially penetrating the thick portion of the sleeve. 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 rolling element circulation circuit is formed by the path and the curved paths at both ends. A number of rolling elements made of, for example, steel balls are loaded in the rolling element circulation circuit. In the figure, reference numeral 7 denotes a grease nipple.

The end cap 2B is an injection-molded product made of a synthetic resin material and has a substantially U-shaped cross section. And
As shown in FIG. 2 which is a perspective view showing an assembled state of the end portion of the slider 2, a reinforcing plate 10 as a plate-like member is provided on each outer surface side of both end caps 2 B from the side near the end cap 2 B. The lubricant-containing member 11 and the side seal 12 as a plate-like member are fixed in an overlapping state.

Of these, the reinforcing plate 10 is a substantially U-shaped steel plate adapted to the outer shape of the end cap 2B.
The two sleeves 10A and 10B have through holes 10a and 10b for penetrating the mounting screw, and the connecting part 10C connecting the two sleeves 10A and 10B has a through hole 10c for grease nipple. Is formed. The reinforcing plate 10 is not in contact with the guide rail 1.

The side seal 12 is made of a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B, and a polyurethane having a shape similar to the steel plate and containing grease integrally formed on the outer surface thereof. It is made up of rubber. The inner surface of the lip portion 13 of the side seal 12 which contacts the guide rail 1 is guided according to the sectional shape of the guide rail 1 so that the gap between the slider 2 and the guide rail 1 can be sealed. Upper surface 1 of rail 1
a and a shape capable of sliding contact with the outer side surface 1b, more specifically,
The rolling elements are formed in a shape that allows sliding contact with the rolling grooves 3A and 3B and the relief grooves 3a. It should be noted that both sleeve portions 12A and 12B of the side seal 12 are also provided with through holes 12 for attaching screws.
a, 12b are formed, and both sleeve portions 12a
A through-hole 12c for a grease nipple is formed in a connecting portion 12C that connects A and 12B.

The lubricant-containing member 11 sandwiched between the side seal 12 and the reinforcing plate 10 is formed in a substantially U-shape according to the outer shape of the end cap 2B. The surface of the guide rail 1 has a flat shape, not a tapered shape, and like the inner surface of the lip portion 13, the upper surface 1 of the guide rail 1 matches the cross-sectional shape of the guide rail 1.
a and the outer surface 1b including the rolling element rolling grooves 3A and 3B.

As shown in FIG. 3 (a) which is a front view of the lubricant containing member 11 and FIG. 3 (b) which is a side view thereof, the two sleeve portions 11A and 11B of the lubricant containing member 11 are provided. Also, through holes 11a and 11b for penetrating the mounting screw are formed, and a through hole 11c for the grease nipple is formed in the connecting portion 11C connecting the both sleeve portions 11A and 11B. Each of 11a and 11b is open to the outer surface side of the sleeve portions 11A and 11B, and the through hole 11c is open to the upper surface side of the connecting portion 11C.

The inner surface of the concave portion of the lubricant containing member 11 has the upper surface 1a of the guide rail 1 and the rolling element rolling grooves 3A, 3A.
B is formed so as to be in sliding contact with the outer side surface 1b including B, and a portion of the inner surface of the concave portion facing the rolling element rolling grooves 3A, 3B and the relief groove 3a of the guide rail 1 has the respective grooves 3A, The protrusions 1 are so slidably contact with the inner surfaces of 3B and 3a.
1f, 11g, 11d and 11e are formed. Further, of the inner surfaces of the recesses of the lubricant containing member 11, the inner bottom surface 11 h slidingly contacting the upper surface 1 a of the guide rail 1 is attached to the sleeve portions 11 A and 11 B in a state in which no external force is applied to the lubricant containing member 11. It has an arc shape with a radius of curvature R such that the center side protrudes downward from the near end side.

Then, both sleeve portions 11 of the lubricant containing member 11
Ring-shaped members 15A and 15B are fitted into the through holes 11a and 11b formed in A and 11B, respectively. These ring-shaped members 15A, 15B
FIG. 4A which is a front view thereof, and FIG. 4 which is a side view thereof.
It is a short cylindrical member as shown in (b), and its outer diameter is such that it can be easily fitted into the through holes 11a and 11b.

The connecting portion 11C of the lubricant containing member 11
The ring-shaped (or solid cylindrical) member 16 is also fitted into the through hole 11c formed in the above. This ring-shaped member 16 is also a short cylindrical member as shown in FIG. 5A which is a front view thereof, and FIG. 5B which is a side view thereof. However, the outer diameter DAR of the ring-shaped member 16 is larger than the inner diameter DA of the through hole 11c. That is, by fitting the ring-shaped member 16 into the through-hole 11c, the through-hole 11c can be expanded.

Further, the length V of the ring-shaped members 15A, 15B and 16 is larger than the thickness W of the lubricant-containing member 11.
It is slightly longer (for example, about 0.2 mm). That is, the ring-shaped members 15A, 15B and 16 are
When fitted into a to 11c, the ends of the ring-shaped members 15A, 15B and 16 project from the front surface or the back surface of the lubricant-containing member 11, as shown in FIG.

The reinforcing plate 10, the lubricant-containing member 11, and the side seal 12 are provided with mounting screws 17A, 17B which penetrate through holes 2a, 2b of the end cap 2B and are screwed to the main body 2A. 12 through holes 12
a, 12b, through holes 11a, 11 of lubricant-containing member 11
By passing through the through-holes 10a and 10b of the ring-shaped members 15A and 15B and the reinforcing plate 10 on the inner side b, it is fixed to the main body 2A integrally with the end cap 2B.

Next, the operation of the present embodiment will be described. That is, when the slider 2 moves on the guide rail 1 fixed to the machine base, the rolling elements in the slider 2 move at a slower speed than the slider 2 in the moving direction of the slider 2 while rolling in the rolling element rolling path. Then, the U-turn on the curved path on one end side moves while rolling in the reverse direction on the rolling element return path, and the circulation returning to the inside of the rolling element rolling path after making a reverse U-turn on the curved path on the other end side is repeated.

When the linear motion guide bearing device is driven in this manner, the lubricant containing member 11 also moves while being in contact with the guide rail 1, and the influence of the frictional heat at the time of the movement is added. The lubricant gradually exudes with time, and the exuded lubricant rolls in the rolling element rolling grooves 3A, 3B of the guide rail 1, particularly through the rolling element rolling grooves 3A, 3B. Automatically supplied to rolling elements. Due to this self-lubricating property, stable and smooth operation is performed for a long time. Therefore, in particular, lubricant is supplied from outside to the slider 2.
, And good operation can be continued for a long time at a low torque without supplying it to the motor.

Since the inner shape of the concave portion of the lubricant containing member 11 is matched with the cross-sectional shape of the guide rail 1 as described above, as shown in FIG.
Can adhere to the upper surface 1a and the side surface 1b of the guide rail 1, and as the lubricant seeps out of the lubricant-containing member 11, the lubricant-containing member 11 itself contracts itself. Due to the contraction force, the sealing surface of the guide rail 1 is always in close contact with the surface to be sealed, and the sealing function and the lubricating function are achieved.

In the case of the present embodiment, the lubricant containing member 11
Since the side seal 12 is used as the plate-shaped member on the outer side, the sealing performance is further improved. In particular, in the present embodiment, since the upper surface side of the through hole 11c formed in the connecting portion 11C of the lubricant containing member 11 is cut open,
As shown in FIG. 8A, the sleeve portions 11A and 11B can be easily pushed right and left, so that the operation of attaching the lubricant containing member 11 across the guide rail 1 can be easily performed.

Since the ring-shaped member 16 having an outer diameter larger than the inner diameter is fitted into the through hole 11c as an urging means, the lubricant-containing member 11 is guided as shown in FIG. In a state where the rail 1 is straddled, the ring-shaped member 16 pushes the through hole 11c right and left, thereby generating an urging force for pressing the sleeves 11A and 11B against the guide rail 1. For this reason, even if there is a slight manufacturing error in the dimensions of the lubricant containing member 11,
Even if the member 1 is worn to some extent, the lubricant-containing member 11 can be surely brought into close contact with the surface to be sealed of the guide rail 1 more reliably. In this case, in the structure in which the upper surface side of the through hole 11c is cut open, the force of the ring-shaped member 16 to push and spread is converted into an urging force for pressing the sleeve portions 11A and 11B against the guide rail 1. It is very advantageous for the operation.

Further, the length V of the ring-shaped members 15A, 15B and 16 is made larger than the thickness W of the lubricant-containing member 11, and the ends of the ring-shaped members 15A, 15B and 16 are made Since the mounting means of the lubricant containing member 11 is configured to protrude from the front surface or the back surface of the lubricant 11, the lubricant containing member 11 is The friction between is reduced. For this reason, the deformation of the lubricant containing member 11 in the direction perpendicular to the axial direction of the guide rail 1 due to the self-shrinkage or the urging force described above is performed smoothly, so that the lubricant containing member 11 is always surely attached to the guide rail 1. Can be in close contact.

Further, since the inner bottom surface 11h of the concave portion of the lubricant containing member 11 is formed in the above-mentioned arc shape, the sleeve portions 11A and 11B of the lubricant containing member 11 are moved by the above-mentioned self-shrinkage and the urging force. When it is deformed in the direction pressed against, the inner bottom surface 1h approaches a horizontal state,
The inner bottom surface 1h comes into stable contact with the upper surface 1a of the guide rail 1.

Further, the lubricant-containing member 11 is
In addition, since it is a member interposed between the side seals 12, it is easy to have a size that can contain a sufficient amount of lubricant to maintain the rolling of the rolling element for a long period of time. In addition, since the lubricant-containing member 11 is not structured to be fixed to another member such as a steel plate, it is possible to reduce the cost of parts of the lubricant-containing member 11 which is a consumable, and to simplify the installation. There is an advantage that is.

Then, the lubricant-containing member 11 is connected to the reinforcing plate 1.
0 and the side seal 12, the portion of the side seal 12 that comes into contact with the guide rail 1, that is, the lip portion 13 is unlikely to roll up even when the slider 2 reciprocates. Leakage of internal grease to the outside is also reduced. Further, the lubricant that has oozed out of the lubricant-containing member 11 is also supplied to the lip portion 13 of the side seal 12 that comes into contact with the guide rail 1.
It is also useful for reducing the wear of the lip portion 13, and in particular, in the present embodiment, since the lip portion 13 is molded from a polyurethane rubber that has been cured in a state containing grease, the lubricant itself can be used. As a result, the wear of the lip portion 13 can be further reduced. Then, since the wear of the lip portion 13 is minimized, the sealing performance of the lip portion 13 is maintained for a long time, foreign matter is prevented from entering the main body 2A side, and the life of the linear motion guide bearing device itself is prolonged. There is an advantage that it can be achieved.

In the structure of the present embodiment, since the lubricant for the rolling elements is constantly supplied from the lubricant containing member 11, the grease nipple mounting hole may be closed with a blind plug. If necessary, the opening may be opened at an appropriate time to supply lubricant such as grease into the slider. Here, in the present embodiment, the side seal 12 corresponds to a plate-shaped member, the reinforcing plate 10 corresponds to another plate-shaped member, and the ring-shaped member 16 corresponds to a biasing unit.

FIGS. 9 and 10 show a second embodiment of the present invention. The same members and portions as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, in the present embodiment, the shape of the lubricant-containing member 11 is changed in the linear motion guide bearing device having the same structure as that of the first embodiment.

More specifically, as shown in FIG. 9, which is a front view of the lubricant containing member 11, the sleeve portions 11A and 11B are continuous with the through holes 11a and 11b through which the mounting screws penetrate, and are connected to the sleeve portion 11A. Notches 20A and 20B are formed so that the outer surface side and the distal end side of the ring-shaped member 15 and 11B are opened, and the ring-shaped member 15 fitted into the through holes 11a and 11b.
The inner diameters of A and 15B are larger than the outer diameters of the threaded portions of the mounting screws 17A and 17B. Other configurations are the same as those in the first embodiment.

With such a configuration, FIG. 10 is a front view of the lubricant-containing member 11 in a state of straddling the guide rail 1.
As shown in the figure, when the mounting screws 17A and 17B are loosened,
Since the ring-shaped members 15A and 15B can move outward,
Only the lubricant-containing member 11 can be removed from the linear motion guide bearing device so as to be pulled upward. Also, the new lubricant-containing member 11 can be fitted from above the guide rail 1 without removing the side seals 12 and the like from the main body 2A, and pushes the ring-shaped members 15A and 15B inward to push the through holes 11a and If the mounting screws 17A and 17B are tightened after being positioned in the inside 11b, the lubricant-containing member 11 can be mounted.

That is, according to the configuration of the present embodiment, the lubricant-containing member 11 from which the lubricant has sufficiently permeated can be easily replaced with a new lubricant-containing member 11.
With the cassette system, lubricant can be replenished with simple effort and without soiling the hands. Other functions and effects are the same as those in the first embodiment.

FIGS. 11 to 17 show a third embodiment of the present invention. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, the structure that generates a biasing force for pressing the sleeve portions 11A and 11B of the lubricant containing member 11 against the guide rail 1 is different from that of the first embodiment. is there.

More specifically, FIG. 11 is a perspective view showing an assembled state of the end portion of the slider 2 and the lubricant-containing member 11.
12 (a) which is a front view of FIG.
As shown in (b), the through hole 11 of the lubricant containing member 11
c is omitted and a substantially U-shaped continuous groove 30 is formed on the surface of the lubricant containing member 11 on the side seal 12 side so as to surround the concave portion of the lubricant containing member 11. 30 is a front view of FIG.
An elastic body 31 as an urging means as shown in (a) and a bottom view (b) is fitted.

The elastic body 31 is an elastically deformable member made of steel, synthetic resin or hard rubber, and is formed in a substantially U-shape according to the shape of the groove 30. The U-shaped opening is slightly narrowed in a state where no force is applied from the outside. Other configurations are the same as those of the first embodiment. However, in the present embodiment, the grease nipple is omitted by omitting the through hole 10c of the reinforcing plate 10 and the through hole 12c of the side seal 12 corresponding to the omission of the through hole 11c of the lubricant containing member 11. Although not provided, the through holes 10c, 11c, and 12c are formed as in the first embodiment.
Normally, the grease nipple mounting hole may be closed with a blind plug, and may be opened as needed to supply lubricant such as grease into the slider.

According to the structure of the present embodiment, the elastic force of the elastic body 31 in the concave groove 30 causes the elastic force shown in FIG.
As shown in FIG.
An urging force for pressing the guide rail 1 against the guide rail 1 is generated. As shown in FIG. 15, when the lubricant-containing member 11 is attached, the sleeve portions 11A and 11B can be pushed right and left. Therefore, as shown in FIG. 16, the lubricant containing member 11 can be stably brought into close contact with the guide rail 1. In particular, since the shape of the elastic body 31 when no load is applied is such that the distance between the tip ends thereof is reduced, even if the lubricant-containing member 11 is worn to some extent, the inner surfaces of the sleeves 11A and 11B can be more reliably guided by the guide rail 1. Can be pressed. Also,
As shown in FIG. 17, since the ring-shaped members 15A and 15B protrude from the surface of the lubricant-containing member 11 as in the first embodiment, the deformation of the lubricant-containing member 11 can be performed smoothly. ing.

As described above, the same operation and effect as those of the first embodiment can be obtained even with the configuration as in the present embodiment. In addition, the elastic body 31 that generates the urging force is disposed so as to surround the concave portion of the lubricant containing member 11, and the elastic body 3
Since the leading end of the sleeve 1 extends to the vicinity of the leading ends of the sleeves 11A and 11B, there is an advantage that the biasing force of the elastic body can be more reliably transmitted to the sleeves 11A and 11B.

FIG. 18 is a view showing a fourth embodiment of the present invention. FIG. 18 (a) is a front view of the lubricant containing member 11, and FIG. FIG. 3 is a sectional view taken along line A.
That is, the configuration of the fourth embodiment is basically the same as that of the third embodiment, except that the configuration is opened upward on the upper surface of the connecting portion 11C of the lubricant containing member 11. This is a point where a substantially rectangular notch 11D is formed.

When such a notch 11D is formed, the rigidity of the connecting portion 11C is reduced, so that the elastic force of the elastic body 31 is converted into an urging force for effectively pressing the sleeve portions 11A and 11B against the guide rail 1. Therefore, the lubricant-containing member 11 can be more securely brought into close contact with the guide rail 1. Other functions and effects are the same as those of the third embodiment.

FIGS. 19 to 22 show a fifth embodiment of the present invention. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, as shown in FIG. 19A which is a front view of the lubricant containing member 11 and FIG. , Outer surfaces of sleeves 11A and 11B and connecting portion 11C
Has an outer peripheral groove 33 formed on the upper surface thereof. At both ends of the outer peripheral groove 33, recesses 33a are formed to enter the inside of both sleeves 11A and 11B.

An elastic body 34 as an urging means as shown in FIG. 20 is fitted into the outer peripheral groove 33. The elastic body 34 is the same as the elastic body 31 shown in the third embodiment except that the size of the elastic body 34 is large, and that the elastic body 34 has a convex portion 34a fitted into the concave portion 33a at the distal end. It has a similar configuration. Even with such a configuration, as shown in FIG.
Since the elastic body 34 urges the sleeve portions 11A and 11B toward the guide rail 1, the lubricant-containing member 11 can be stably brought into close contact with the guide rail 1, and as shown in FIG. Since the ring-shaped members 15A and 15B protrude from the surface of the lubricant-containing member 11 as in the first embodiment, the deformation of the lubricant-containing member 11 can be performed smoothly. Therefore, even in the fifth embodiment, the same operation and effect as in the third embodiment can be obtained.

According to the structure of the present embodiment, as shown in FIG. 22, it is possible to attach and detach only the elastic body 34 without loosening or removing the mounting screws 17A and 17B. For this reason, since the elastic body 34 can be attached after all the parts are assembled, when it is not necessary to press the lubricant-containing member 11 against the guide rail 1, the elastic body 34 is removed, and when it becomes necessary to press it. Only the elastic body 34 can be used, or the elastic body 34 can be replaced when it is desired to change the pressing force of the lubricant-containing member 11 against the guide rail 1.

Therefore, for example, a new lubricant-containing member 1
Immediately after the use of No. 1, the lubricant-containing member 11 hardly wears, and can be sufficiently adhered without the elastic body 34 attached. On the other hand, when the elastic body 34 is attached, the lubricant stains. Since there is a possibility that the amount of protrusion may be too large, the elastic body 34 is removed. Then, when the abrasion progresses and the adhesiveness is reduced, the elastic body 34 is attached so that the adherence is sufficient, and in some cases, when the abrasion progresses, the elastic body 34 is replaced with an elastic body 34 having a strong elastic force. This makes it possible to stabilize the amount of lubricant exuded from immediately after use to immediately before replacement.

In this embodiment, the recesses 33a are formed at both ends of the outer peripheral groove 33, and the projections 34a fitted into the recesses 33a are formed at the ends of the elastic body 34. Even if the elastic member 34 is configured to be fitted from the outside, the elastic body 34 does not easily fall off or shift in the removal direction. FIG. 23 is a view showing the sixth embodiment of the present invention, and is a front view of the lubricant containing member 11.

That is, the configuration of the sixth embodiment is basically the same as that of the third embodiment except that the upper surface of the connecting portion 11C of the lubricant containing member 11 is A substantially rectangular notch 11D that is open to the outside is formed, whereby the same operation and effect as those of the fourth embodiment can be obtained. Other functions and effects are the same as those of the fifth embodiment.

FIGS. 24 to 26 are views showing a seventh embodiment of the present invention. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, as shown in FIG. 24 which is a front view of the lubricant-containing member 11, the lubricant-containing member 1 is connected to the connecting portion 11C of the lubricant-containing member 11.
One linear groove 37 extending in the width direction is formed.
Then, an elastic body 38 as an urging means as shown in FIG. 25 (a) which is a front view and FIG. 25 (b) which is a bottom view is fitted into the concave groove 37.

The elastic body 38 is a thin prismatic elastic body made of steel, synthetic resin, or hard rubber slightly bent in a shape of a letter, and is a front view in FIG. 26 (a) and a side view in FIG. As shown in (b), the shape is fitted into the concave groove 37 with its shape curved in the opposite direction.
Even with such a configuration, since the connecting portion 11C of the lubricant containing member 11 tends to be bent inward by the elastic restoring force of the elastic body 38, the urging force for pressing the sleeve portions 11A and 11B against the guide rail 1 is not sufficient. appear. Therefore, the same operation and effect as those of the first embodiment can be obtained.

FIGS. 27 to 29 show the eighth embodiment of the present invention. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, as shown in FIG. 27 which is a front view of the lubricant containing member 11, a rectangular through hole 39 which is long in the left-right direction is formed in the connecting portion 11C of the lubricant containing member 11. are doing. The lubricant-containing member 1
A notch 11E is formed on the upper side of 1 so as to communicate with the through hole 39.

The coil spring 40 as the urging means as shown in FIG. 28 (a) which is a front view and FIG. 28 (b) which is a side view has its expansion and contraction direction directed right and left and slightly compressed. FIG. 29A which is a front view in this state.
And as shown in FIG. 29 (b) which is a partially broken side view,
It is accommodated in the through hole 39. Even with such a configuration, the notch 11E reduces the rigidity of the connecting portion 11C in the left-right direction, and the elastic restoring force of the coil spring 40 causes the connecting portion 11C of the lubricant-containing member 11C.
Because C is about to be pushed right and left, sleeve 11A,
An urging force is generated to press 11B against the guide rail 1.
Therefore, the same operation and effect as those of the first embodiment can be obtained.

FIG. 30 shows a ninth embodiment of the present invention. FIG. 30 (a) is a front view, and FIG. 30 (b) is a partially cutaway side view. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, the slits 41 extending in the up-down direction and opening to the distal ends of the sleeves 11A, 11B are formed in the sleeves 11A, 11B of the lubricant containing member 11.
A, 41B, and the slits 41A,
A rectangular through hole 42 long in the left-right direction is provided in the middle of 41B.
A, 42B are formed, and in the through holes 42A, 42B,
It accommodates coil springs 43A and 43B as urging means in a state where the direction of expansion and contraction is directed to the left and right and slightly compressed.

Even with such a configuration, the slit 41
A, 41B reduces the rigidity of the connecting portion 11C in the left-right direction, and the coil springs 43A, 43B.
Since the elastic restoring force of B becomes the urging force for pressing the sleeve portions 11A and 11B against the guide rail 1 as it is, the same operation and effect as in the first embodiment can be obtained. FIG. 31 shows a tenth embodiment of the present invention.
(A)-(d) is a perspective view which shows the modification of the ring-shaped member 16 fitted in the through-hole 11c of the lubricant containing member 11. FIG. The configuration other than the ring-shaped member 16 is the same as that of the first
This is the same as the embodiment.

That is, in the present embodiment, the ring-shaped member 16 as an urging means formed of a deformable material such as a metal or a polymer material (plastic, rubber, etc.)
A slit 16a extending in the axial direction is formed in the outer peripheral surface of the. Then, similarly to the above embodiments, the through holes 11
c is slightly smaller than the outer diameter of the ring-shaped member 16 so that the diameter of the ring-shaped member 16 is reduced.
However, since the slit 16a is formed, the elastic deformation in the direction in which the diameter of the ring-shaped member 16 expands / contracts can be performed more smoothly. Then, the effect of expanding the through-hole 11c can be stably obtained over a long period of time.
The urging force for pressing A, 11B against the guide rail 1 is maintained for a long time, and the same operation and effect as in the first embodiment can be more reliably obtained.

The diameter-expanding action of the ring-shaped member 16 when fitted in the through hole 11c is determined by the size and number of the slits 16a formed therein, the thickness and material of the ring-shaped member 16, and the like. The urging force for pressing the sleeves 11A and 11B against the guide rail 1 and the wear limit of the lubricant-containing member 11 are determined by the deformation characteristics of the ring-shaped member 16. Therefore, each of the above factors depends on the size of the applied linear guide bearing device. It is necessary to appropriately select the material according to the sheath specifications, the rigidity of the lubricant-containing member 11, and the like. Accordingly, the number of slits 16a and the like are not limited to the examples shown in FIGS. 31 (a) to 31 (d), but are completely arbitrary.

FIG. 32 is a view showing a modification of the tenth embodiment. In place of the ring-shaped member 16, a solid cylindrical member 16A as an urging means is inserted through the through hole 11c.
The cylindrical member 1
A slit 16b is formed in 6A so that the diameter can be enlarged or reduced. And even if such a columnar member 16A is used, the same operation and effect as the case where the ring-shaped member 16 as shown in FIG. 31 is used can be obtained. Since the diameter-expanding action of the columnar member 16 is determined by the material thereof, the size and the number of the slits 16b, and the like, each factor is applied to the linear motion guide as in the case of the ring-shaped member 16. It is necessary to appropriately select the size and specifications of the bearing device, the rigidity of the lubricant-containing member 11, and the like. Therefore, the size, number, etc. of the slits 16b are not limited to the examples shown in FIGS. 32 (a) to 32 (c) and are completely arbitrary.

FIG. 33 is a view showing an eleventh embodiment of the present invention, and is a front view of the lubricant-containing member 11 in a state of straddling the guide rail 1. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, both sleeve portions 11A, 11B of connecting portion 11C of lubricant-containing member 11 are provided.
A total of two through holes 11c are formed at the twisted positions, and the slit 16 shown in the tenth embodiment is formed in each of the through holes 11c.
The ring-shaped member 16 having a is fitted.

As described above, even in the configuration in which the plurality of through holes 11c and the ring-shaped members 16 are provided, the connecting portion 11C of the lubricant-containing member 11 tends to be curved inward by the expanding force of the ring-shaped members 16. Accordingly, an urging force is generated to press the sleeves 11A and 11B against the guide rail 1. Therefore, the same operation and effect as those of the first embodiment can be obtained. Note that three or more through holes 11c may be formed,
Instead of the ring-shaped member 16, a columnar member 16A as shown in FIG. 32 may be fitted into the plurality of through holes 11c.

In the above embodiment, the lip 13
Is described from rubber containing a lubricant. However, since the lubricant is supplied from the lubricant containing member 11 to the lip 13, the lip 13 is made of NBR (acrylonitrile pig) containing no lubricant. (Didene rubber). Further, in the configuration of each of the above embodiments,
The reinforcing plate 10 may be omitted, and the lubricant-containing member 11 may be disposed sandwiched between the end cap 2B and the side seal 12, or the lubricant-containing member 11 substantially functions as a sealing device. Instead of the side seal 12, a steel plate similar to the reinforcing plate 10 may be provided as a reinforcing plate or a protector. In some cases, the lubricant-containing member 11
Between the end cap 2B and the reinforcing plate 10, a side seal 12 may be provided.

Further, in each of the above embodiments, the length V of the ring-shaped members 15A, 15B, 16 is larger than the thickness W of the lubricant containing member 11, but the length V is equal to the thickness W. Or it may be slightly smaller. In short, when the lubricant-containing member 11 is fixed by tightening the mounting screws 17A and 17B, the screws 17A and 17B are excessively tightened, so that the lubricant-containing member 11 moves in a direction perpendicular to the axial direction of the guide rail 1 of the lubricant-containing member 11. It suffices if the relationship between the length V and the thickness W does not hinder the deformation.

The linear guide bearing device to which the present invention can be applied is not limited to the type of the above-described embodiment. For example, the rolling groove of the load rolling element may be other than two on one side. The moving body may be, for example, a roller instead of a ball.

[0080]

As described above, according to the first and second aspects of the present invention, the lubricant gradually seeping out of the lubricant-containing member with time is supplied to the rolling elements via the guide rails. Therefore, there is an effect that smooth rolling of the rolling element can be maintained. In this case, in the case of using the side seal as the plate-like member, the lubricant from the lubricant-containing member can reduce the wear of the contact surface of the side seal with the guide rail, and the foreign matter enters the rolling element rolling groove. Can be prevented, and the life of the linear motion guide bearing device can be further increased.

According to the third aspect of the invention, since the lubricant-containing member can be always in contact with the guide rail,
The lubricant that has oozed out of the lubricant-containing member can be stably supplied to the rolling elements via the guide rails, and there is an effect that smooth rolling of the rolling elements can be more reliably maintained. Also, in the invention according to claims 4, 5 and 6, since the lubricant-containing member can always be brought into contact with the guide rail, the lubricant that has oozed out of the lubricant-containing member can be stably guided. The rolling element can be supplied to the rolling element via the contact member, and the smooth rolling of the rolling element can be maintained more reliably.

According to the seventh aspect of the present invention, since the lubricant-containing member can stably contact the guide rail, the lubricant is more stably supplied to the rolling elements via the guide rail. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a linear motion guide bearing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an attached state of each member at an end of a linear motion guide bearing device.

FIG. 3 is a diagram illustrating a configuration of a lubricant-containing member according to the first embodiment.

FIG. 4 is a diagram showing a configuration of a ring-shaped member.

FIG. 5 is a diagram showing a configuration of a ring-shaped member.

FIG. 6 is a side view of the lubricant-containing member with the ring-shaped member attached.

FIG. 7 is a front view of a lubricant containing member straddling a guide rail.

FIG. 8 is an explanatory diagram of an operation.

FIG. 9 is a front view illustrating a configuration of a lubricant containing member according to a second embodiment.

FIG. 10 is an explanatory diagram of the operation of the second embodiment.

FIG. 11 is a perspective view showing an attached state of each member at an end of a linear motion guide bearing device according to a third embodiment.

FIG. 12 is a diagram illustrating a configuration of a lubricant-containing member according to a third embodiment.

FIG. 13 is a diagram illustrating a configuration of an elastic body according to a third embodiment.

FIG. 14 is an explanatory diagram of an operation of the third embodiment.

FIG. 15 is an explanatory diagram of the operation of the third embodiment.

FIG. 16 is a front view of a lubricant containing member straddling a guide rail according to a third embodiment.

FIG. 17 is a side view of a lubricant-containing member in a state where the ring-shaped member according to the third embodiment is attached.

FIG. 18 is a diagram illustrating a configuration of a lubricant containing member according to a fourth embodiment.

FIG. 19 is a diagram illustrating a configuration of a lubricant containing member according to a fifth embodiment.

FIG. 20 is a diagram illustrating a configuration of an elastic body according to a fifth embodiment.

FIG. 21 is a diagram illustrating an assembled state according to the fifth embodiment.

FIG. 22 is a perspective view of a linear motion guide bearing device according to a fifth embodiment.

FIG. 23 is a front view showing a lubricant-containing member according to a sixth embodiment.

FIG. 24 is a diagram illustrating a configuration of a lubricant-containing member according to a seventh embodiment.

FIG. 25 is a diagram illustrating a configuration of an elastic body according to a seventh embodiment.

FIG. 26 is a diagram illustrating an assembled state according to the seventh embodiment.

FIG. 27 is a front view showing a lubricant-containing member according to an eighth embodiment.

FIG. 28 is a diagram illustrating a configuration of an elastic body according to an eighth embodiment.

FIG. 29 is a diagram illustrating an assembled state according to the eighth embodiment.

FIG. 30 is a front view showing the configuration of the ninth embodiment.

FIG. 31 is a perspective view showing a tenth embodiment.

FIG. 32 is a perspective view showing a modification of the tenth embodiment.

FIG. 33 is a front view showing the configuration of the eleventh embodiment.

[Description of Signs] 1 Guide rail 1a Upper surface 1b Side surface 2 Slider 2A Main body 2B End cap 3A, 3B Rolling element rolling groove 10 Reinforcement plate (plate-like member) 11 Lubricant-containing member 11A, 11B Sleeve 11C Connecting portion 11a- 11c Through-hole 12 Side seal (plate member) 13 Lip 15A, 15B Ring member 16 Ring member (biasing means) 16A Columnar member (biasing means) 17A, 17B Mounting screws 20A, 20B Notch 31 , 34, 38 Elastic body (biasing means) 40, 43A, 43B Coil spring (biasing means)

Claims (7)

[Claims] A slider is loosely fitted on an axially extending guide rail having a rolling element rolling groove on an outer surface, the slider being a load rolling element rolling groove opposed to the rolling element rolling groove of the guide rail. And a rolling element circulation path including a rolling element return path connected to both ends of the load rolling element rolling groove via a curved path,
In a linear guide bearing device in which a number of rolling elements for relatively moving the slider along the guide rail are loaded in the rolling element circulation path, a lubricant-containing member made of rubber or synthetic resin containing a lubricant is used. A linear guide bearing device, wherein the linear guide bearing device is sandwiched between an end surface of the slider and a plate-like member and is attached in a state where at least a part of the lubricant-containing member is in contact with the guide rail. . 2. The linear guide bearing device according to claim 1, wherein another plate-shaped member is sandwiched between the end surface of the slider and the lubricant-containing member. 3. The linear motion guide bearing device according to claim 1, further comprising mounting means for enabling deformation of the lubricant-containing member in a direction perpendicular to an axial direction of the guide rail. 4. A slider is loosely fitted on an axially extending guide rail having a rolling element rolling groove on an outer surface, and the slider is a load rolling element rolling groove opposed to the rolling element rolling groove of the guide rail. And a rolling element circulation path including a rolling element return path connected to both ends of the load rolling element rolling groove via a curved path,
In a linear guide bearing device in which a number of rolling elements for relatively moving the slider along the guide rail are loaded in the rolling element circulation path, a lubricant-containing member made of rubber or synthetic resin containing a lubricant is used. The slider is attached to an end of the slider in a state of being sandwiched between an end surface of the slider and the plate-shaped member, and is provided with biasing means for generating a biasing force for pressing the lubricant-containing member against the guide rail. Linear motion guide bearing device. 5. The linear motion guide bearing device according to claim 4, wherein another plate-shaped member is sandwiched between the end face of the slider and the lubricant-containing member. 6. The linear motion guide bearing device according to claim 4, further comprising mounting means for enabling deformation of the lubricant-containing member in a direction perpendicular to an axial direction of the guide rail. 7. The U-shaped recessed bottom surface of the lubricant-containing member in a state where the lubricant-containing member is substantially U-shaped across the guide rail and no external force is applied to the lubricant-containing member. The linear guide bearing device according to any one of claims 4 to 6, wherein the linear guide bearing device has a circular arc shape whose central portion protrudes from the sleeve portion side.