JPH0949521A - Linear guide device for wood working - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply lubricant to a rolling body for a long period even under the atmosphere of wood chips. SOLUTION: A member 11 containing lubricant consisting of rubber or synthetic resin containing 30-90wt.% of lubricant is mounted to the end face of an end cap 2B of a slider 2 relatively moving on a guide rail having a rolling body rolling groove on the outer surface to be sandwiched between a seal device 12 and the end face of the end cap 2B. The seal device 12 seals an opening of a gap between the slider 2 and guide rail to prevent the intrusion of wood chips into the slider 2. The lubricant containing member 11 supplies gradually the contained lubricant to a seal part 13 of the seal device 12 over a long period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woodworking linear guide device used in a woodworking machine such as a router, and more particularly to a rolling element of a woodworking linear guide device which is liable to run out of wood and easily run out of oil. The lubricant can be stably supplied to the seal portion over a long period of time.

[0002]

2. Description of the Related Art In a conventional woodworking linear guide device, for example, as shown in FIG. 11, a sealing device S is installed at an end portion of an end cap 2B of a slider 2 which straddles a guide rail 1.
~ 3 sheets are superposed and attached with screws B, and the opening of the gap between the slider 2 and the guide rail 1 is sealed in 2 to 3 steps by the rubber sealing portion (seal lip) of the sealing device S to invade wood chips. Is being prevented.

However, in a conventional woodworking linear guide device having a sealing device in which a plurality of seals are stacked as described above, a large amount adheres to the outer surface of the guide rail when operating in an atmosphere with a lot of wood chips. The wood dust that has been raked up sucks up the oil component of the lubricant such as grease that is previously enclosed in the slider. Therefore, even if a plurality of sheets are stacked and used, the rubber seals become dry and move while contacting the outer surface of the guide rail, causing abnormal wear. In the worst case, the contact portion with the guide rail will be stripped off. If this happens, the sealing device loses its sealing function, and wood chips will suddenly enter the slider, leading to poor circulation of the rolling elements.
Eventually, the end cap 2B may even be damaged.

On the other hand, the applicant of the present application (for example, Japanese Patent Laid-Open No. 6-346919) can automatically and stably supply a lubricant for a long period for a linear guide device for general machines. I proposed something like this. This is a seal device having a seal device having a seal part made of rubber or synthetic resin containing lubricant between the outer surface of the guide rail and the inner surface of the slider which moves along the guide rail. Contacts the outer surface of the guide rail to seal the opening in the gap between the inner surface of the slider and the outer surface of the guide rail. Since the seal portion formed of the lubricant-containing rubber or synthetic resin has a self-lubricating property, the lubricant contained in the seal itself gradually exudes and automatically moves to the seal friction surface. It is possible to obtain the effect of being supplied and suppressing wear of the seal portion.

[0005]

SUMMARY OF THE INVENTION Here, the above-mentioned Japanese Patent Laid-Open No.
Considering applying the technique disclosed in Japanese Patent Publication No. 346919 to a linear guide device for woodworking, it is true that if the seal portion has self-lubricating property, the lubricant absorbed by the wood chips and lost. Some of the above can be replenished with a lubricant automatically supplied from the seal itself, and the effect that the wear of the seal portion can be suppressed to some extent can be obtained. However, a large amount of wood dust is often present in the working atmosphere where the linear guide device for woodworking is used, and absorption of the lubricant is promoted. By itself, it is not possible to suppress wear of the seal portion for a long period of time, and therefore, it is almost impossible to maintain smooth rolling motion of rolling elements such as balls and rollers for guiding the movement of the slider for a long period of time. There is an open issue that is possible.

The present invention has been made by paying attention to the problems of the prior art as described above. It is possible to constantly supply the lubricant, and even if the lubricant is used in a wood chip atmosphere, An object of the present invention is to provide a linear guide device for woodworking, which can maintain a smooth rolling motion for a long period of time.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a slider is loosely fitted to a guide rail which 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 of a gap between the slider and the guide rail is sealed at an end of the slider. In a linear guide device for woodworking, which is provided with a sealing device for preventing the invasion of wood chips, a lubricant containing rubber or synthetic resin that gradually supplies a lubricant containing 30 to 90% by weight to the seal portion of the sealing device. Parts Is characterized in that the mounting in a state sandwiched between the end of the sealing device and the slider.

Thus, the lubricant-containing member itself is
Since the structure is arranged between the slider end surface and the seal device, unlike the case where the seal part of the seal device contains a lubricant, the rolling element is present even in an atmosphere where there is a large amount of wood chips and oil is easily absorbed. It is easy to include a lubricant in an amount sufficient to maintain the rolling for a long period of time.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 are diagrams showing an embodiment of the present invention. First, the structure will be described.
As shown in FIG. 1 which is a perspective view of the linear guide device for woodworking according to the present embodiment, the rolling element rolling grooves 3A, 3 are formed on the outer surface thereof.
A guide rail 1 having B and extending in the axial direction, and a slider 2 mounted so as to straddle the guide rail 1 are provided.

Specifically, one rolling element rolling groove 3A, which is 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. At the same time, the other rolling element rolling groove 3B having a substantially semicircular cross section is formed at an intermediate position on both side surfaces 1b of the guide rail. At the groove bottom of the rolling element rolling groove 3B, there is formed an escape groove 3a of the cage for preventing the rolling element from falling off when the slider 2 is not assembled to the guide rail 1.

On the other hand, the slider 2 is composed of a slider body 2A and end caps 2B attached to both ends thereof, and the slider body 2A is provided on the inner side surfaces of the sleeve portions 4 with rolling element rolling grooves 3A of the guide rail 1. It has a load rolling element rolling groove (not shown) facing 3B, and a rolling element return path that penetrates the thick portion of the sleeve portion in the axial direction. On the other hand, the end cap 2B has a curved path (not shown) that communicates the rolling element rolling groove of the slider body 2A with the rolling element returning path parallel to the rolling groove. A rolling element circulation circuit is formed by the path and the curved paths at both ends. A large number of rolling elements made of, for example, steel balls are loaded in the rolling element circulation circuit. In the figure, 7 is 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. Then, as shown in FIG. 2, which is a perspective view showing the assembled state of the end portion of the slider 2, the reinforcing plate 10 and the lubricant are provided on the outer surface sides of both end caps 2B from the side close to the end caps 2B. The containing member 11 and the sealing device 12 are
It is fixed in a superposed state.

Of these, the reinforcing plate 10 is a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B,
Through-holes 10a and 10b for penetrating a mounting screw are formed in both sleeve portions 10A and 10B, and a through-hole 10c for a grease nipple is formed in a connecting portion 10C connecting both sleeve portions 10A and 10B. Has been formed. The reinforcing plate 10 is not in contact with the guide rail 1.

Further, the sealing device 12 is a means for adhering or baking a sealing plate made of rubber or synthetic resin to the outer surface of a reinforcing plate (not shown) made of a substantially U-shaped thin steel plate which conforms to the outer shape of the end cap 2B. The inner circumference of the seal plate extends inward from the reinforcing plate,
A seal portion 13 that closely contacts the outer surface of the guide rail 1 on its inner periphery and seals the gap between the slider 2 and the guide rail 1.
have. The seal portion 13 is made of, for example, polyurethane rubber cured in a state of containing grease,
Its shape is such that it can be slidably contacted with the upper surface 1a and the outer surface 1b, which are the sealed surfaces of the guide rail 1, through the seal lip in accordance with the cross-sectional shape of the guide rail 1, and the rolling element rolling grooves 3A, 3B. 13 which is slidably in contact with the cage escape groove 3a
Also, a, 13b, 13c and 13d are also provided in a protruding manner. The sleeves 12A and 12B of the sealing device 12
Also, through holes 12a and 12b for penetrating the mounting screw are formed, and a through hole 12c for a grease nipple is formed in a connecting portion 12C connecting both sleeve portions 12A and 12B.
Are formed.

The lubricant containing member 11 sandwiched between the sealing device 12 and the reinforcing plate 10 is formed in a substantially U-shape conforming to the outer shape of the end cap 2B, and the inside of the U-shape is formed. Similar to the inner peripheral surface of the sealing device 12, the surface of is shaped to be slidable in contact 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. That is, as shown in FIG. 3A which is a front view and FIG. 3B which is a side view of the lubricant containing member 11, the inner surface of the recess of the lubricant containing member 11 is the upper surface of the guide rail 1. 1a and the side surface 1b are formed so as to be in sliding contact with each other, and at the portion of the inner surface of the recess facing the rolling element rolling grooves 3A, 3B and the clearance groove 3a of the guide rail 1, these grooves 3A, 3B and Protrusions 11d, 11e, 11f and 11g are formed so as to slide on the inner surface of 3a. Further, of the inner surface of the recess of the lubricant containing member 11, an inner bottom surface 11h that slidably contacts the upper surface 1a of the guide rail 1.
Has an arcuate shape with a radius of curvature R so that the central portion of the lubricant-containing member 11 projects downward more than the end portions near the sleeve portions 11A and 11B when no external force is applied. .

Both sleeve portions 1 of the lubricant containing member 11
1A and 11B also have through holes 11a and 1 for penetrating mounting screws.
1b is formed, and both sleeve portions 11A and 11B are formed.
A through hole 11c for a grease nipple is formed in a connecting portion 11C for connecting B.
Each of b is opened to the outer surface side of the sleeve portions 11A and 11B, and the through hole 11c is opened to the upper surface side of the connecting portion 11C.

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

Further, the connecting portion 11C of the lubricant containing member 11
The ring-shaped member 16 is also fitted into the through hole 11c formed in the. This ring-shaped member 16
5 is a front view of FIG. 5A and a side view of FIG.
It is a short cylindrical member as shown in (b). However, the outer diameter D _AR of the ring-shaped member 16 is larger than the inner diameter D _A of the through hole 11c. That is, the ring-shaped member 16 functions as an urging means that pushes the through hole 11c to spread it by fitting it into the through hole 11c.

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 by
It is slightly longer (for example, about 0.2 mm). That is, the ring-shaped members 15A, 15B and 16 are connected to the through hole 11
When fitted into a to 11c, as shown in FIG. 6, 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.

The reinforcing plate 10, the lubricant-containing member 11 and the sealing device 12 have mounting screws 17A and 17B which penetrate the through holes 2a and 2b of the end cap 2B and are screwed into the main body 2A. 12 through holes 12a,
12b, the ring-shaped members 15A and 15B inside the through holes 11a and 11b of the lubricant containing member 11, and the through holes 10a and 10b of the reinforcing plate 10 are fixed to the main body 2A integrally with the end cap 2B.

Materials for the lubricant-containing member of the present invention will be described in detail below. First, in the case of a lubricant-containing member obtained by adding a lubricant to rubber, for example, polyurethane rubber cured in the state of containing grease can be applied. Polyurethane rubber is a compound produced by the reaction of a polyisocyanate and an active hydrogen compound, and 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 and polyamino. Short chain active hydrogen compounds such as compounds can be used. As the grease, ordinary grease such as mineral oil lithium soap grease can be used.

Next, when a lubricant is contained in a synthetic resin to form a lubricant-containing member, the lubricant-containing member has basically the same chemical structure such as polyethylene, polypropylene, polybutylene, polymethylpentene. Synthetic resins selected from the group of polyolefin resins include paraffin hydrocarbon oils such as poly α-olefin oils, naphthene hydrocarbon oils, mineral oils, ether oils such as dialkyldiphenyl ether oils, and phthalate esters as lubricants. A material prepared by injection molding of a raw material prepared by mixing any one of such ester oils or the like in the form of a mixed oil can be applied, and an antioxidant, a rust inhibitor,
It is possible to add various additives such as antiwear agents, antifoam agents and extreme pressure agents.

The kinematic viscosity of the oil used as the above lubricant is
The rate at which the lubricant exudes from the lubricant-containing member affects the speed. That is, it is recognized that the higher the kinematic viscosity, the slower the bleeding rate. The kinematic viscosity of the lubricant used in the present invention is preferably ISO VG 100 or more. That is, the present inventors have studied the influence of the kinematic viscosity of the lubricant on the seal function, and therefore, the seal portion 13 of the seal device 12 is examined.
The size of the sample with the exudation of the contained lubricant was tested by carrying out the standing test for 40 days or more using a sample formed of the same material as the above-mentioned lubricant containing member and mixed with lubricants with different kinematic viscosities. The rate of change was measured. The results are shown in Fig. 9. From the figure, when the kinematic viscosities are ISO VG100 (circle mark) and VG220 (△ mark), the dimensional change rate gradually increases to − side with leaving, and when left for about 40 days, the dimensional change rate becomes about −0.7%. You can see. In the case of a seal device for a normal linear guide device, when the seal portion shrinks to a dimension change rate of about -0.7%, a gap is formed between the seal surface of the guide rail and the seal function and lubrication function tend to deteriorate. Occurs. Therefore, the range of kinematic viscosity of the lubricant used in the present invention is ISO VG
56 to 680, preferably ISO VG100 to 2
Twenty. If it is less than ISO VG56, the rate of exudation from the lubricant-containing member is too fast, and the lubricating oil cannot be gradually supplied over a long period of time. On the other hand, when the kinematic viscosity exceeds ISO VG680, the lubricant containing member 11 is prepared by using the raw material prepared by mixing the synthetic resin with the lubricant.
Is difficult to form by injection molding,
The bleeding speed is slow and the function is not fully achieved.

The composition ratio of the lubricant-containing member is 70 to 10% by weight of the polyolefin resin and 30 to 90% by weight of the lubricant with respect to the total weight. If the oil content exceeds 90% by weight, the amount of the polyolefin resin will be less than 10% by weight, and in that case, hardness or strength, etc. above a level that can be practically used cannot be obtained. On the other hand, when the oil content is less than 30% by weight, the polyolefin resin exceeds 70% by weight, and as a result, the supply of the lubricant is reduced and the function as a lubricant supply member can be sufficiently exerted in the wood chip atmosphere. Disappear.

The groups of synthetic resins mentioned above 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 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 the above-mentioned 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 supply ability. . Next, the operation of this embodiment will be described. When the woodworking machine is operated and the slider 2 moves on the guide rail 1 fixed to the machine base, the rolling elements in the slider 2 roll in the load rolling element rolling path and move in the moving direction of the slider 2. It moves at a slower speed than the slider 2 and makes a U-turn on the curved path on one end side to move while rolling in the reverse direction on the rolling element return path, and makes a reverse U-turn on the curved path on the other end side to make a load rolling element rolling. The circulation returning to the path is repeated.

When the woodworking machine is operated in this manner, a large amount of wood chips are generated and become dust, and the upper surface 1a, the side surface 1b, the rolling element rolling grooves 3A, 3 of the guide rail 1 of the linear guide device.
Attach to B etc. As it is, the adhered wood dust prevents the smooth rolling of the rolling elements rolling in the rolling element rolling grooves 3A and 3B and hinders the movement of the slider 2. In this case, however, the front and rear ends of the slider 2 are disturbed. The seal leap of the seal portion 13 of the seal device 12 attached to the outermost side of the slide slides on the outer surface of the guide rail and scrapes off wood dust adhering to the rail surface, and thus penetrates into the inside of the slider 2. Never.

Moreover, in this embodiment, the seal portion 13
Is molded from polyurethane rubber that is hardened in a state that it contains grease as a lubricant, the lubricant is also supplied from itself, and wear of the seal lip of the seal portion 13 can be reduced. However, when the amount of wood chips generated is large, the amount of adhesion also increases accordingly. Then, the deposit of the wood chips absorbs the lubricating oil component of the grease supplied to the sliding surface of the seal lip one after another. As a result, the lubrication function of grease is lost, and the seal lip slides on a dry surface free of lubricating oil, and wear and deterioration of the seal lip proceed. Therefore, it is necessary to make the seal portion 13 self-lubricating. ,
The sealing performance of the sealing device 12 cannot be maintained for a long period of time.

However, in the present embodiment, the lubricant-containing member 11 also moves while contacting the guide rail 1, and the effect of frictional heat at the time of the movement also adds, so that the lubricant from the lubricant-containing member 11 changes with time. Gradually exudes. The lubricant that has exuded is automatically supplied to the rolling elements rolling in the rolling element rolling grooves 3A and 3B of the guide rail 1, particularly through the rolling element rolling grooves 3A and 3B. Due to this self-lubricating property, wear of the groove surfaces of the rolling element rolling grooves 3A and 3B is suppressed, and stable and smooth operation is performed for a long period of time. Therefore, particularly without further supplying a lubricant to the slider 2 from the outside, it is possible to continue a good operation with a low torque for a long time even in an atmosphere containing a lot of wood chips.

Incidentally, the conventional linear guide device for woodworking by the present inventors (without the lubricant-containing member 11)
FIG. 10 shows the result of recording the fluctuation of the surface roughness of the groove surface of the rolling element rolling groove of the guide rail in a comparative test of the above and that of the present invention (having the lubricant-containing member 11). FIG. 10A showing a case of a conventional linear guide device for woodworking.
On the other hand, with the passage of time, the section L in which the irregularities on the groove surface have disappeared is recognized, and the occurrence of initial wear appears. On the other hand, in FIG. 10 (a) showing the case of the linear guide device for woodworking of the present invention, no expression of the section L, that is, initial wear was observed.

Further, since the shape of the inner surface of the recess 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 exudes from the lubricant containing member 11, the lubricant containing member 11 itself contracts. By the contracting force, it is possible to obtain an effect that the sealed surface of the guide rail 1 is always brought into close contact with the sealed surface to fulfill the sealing function and the lubricating function.

In particular, in this embodiment, since the upper surface side of the through hole 11c formed in the connecting portion 11C of the lubricant containing member 11 is notched and opened, as shown in FIG. Since the sleeve portions 11A and 11B can be easily pushed to the left and right, the work of attaching the lubricant-containing member 11 across the guide rail 1 can be easily performed. And
Since the ring-shaped member 16 having an outer diameter larger than the inner diameter is fitted into the through hole 11c, as shown in FIG. 8B, when the lubricant-containing member 11 straddles the guide rail 1. , The ring-shaped member 16 as the urging means is the through hole 1
By pushing 1c to the left and right, sleeves 11A and 1A
A biasing force that pushes 1B against the guide rail 1 is generated. Therefore, even if there is a slight manufacturing error in the dimensions of the lubricant-containing member 11, or even if the lubricant-containing member 11 is slightly worn,
The lubricant-containing member 11 can be more surely brought into close contact with the surface to be sealed of the guide rail 1 at all times.

Moreover, 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 so that the end portions of the ring-shaped members 15A, 15B and 16 are made into the lubricant-containing member. 11 and the outer diameters of the ring-shaped members 15A, 15B and 16 are the through holes 12a and 12b of the sealing device 12, respectively.
The extending 12c and the through holes 10a, 10b and 1 of the reinforcing plate 10
Since the lubricant-containing member 11 is made larger than the inner diameter of 0c, the friction between the lubricant-containing member 11 and the seal plate 12 is small even though the lubricant-containing member 11 is sandwiched between the reinforcing plate 10 and the seal device 12. For this reason, the lubricant-containing member 11 is smoothly deformed by the self-contraction and the urging force described above, so that the lubricant-containing member 11 can always be surely brought into close contact with the guide rail 1.

Further, since the inner bottom surface 11h of the concave portion of the lubricant containing member 11 is formed in the arc shape as described above, the sleeve portions 11A and 11B of the lubricant containing member 11 are guided by the guide rail 1 by the above-mentioned self-shrinkage and urging force. When deformed in the direction of being 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.

The lubricant-containing member 11 is used as the reinforcing plate 10
Since it is a member that is sandwiched between the sealing device 12 and the sealing device 12, it is easy to make the size sufficient to contain a sufficient amount of lubricant for maintaining the rolling of the rolling elements for a long period of time. Moreover, 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 that is a consumable item, and the labor for disposing the product is simple. The advantage is that

Then, the lubricant-containing member 11 is attached to the reinforcing plate 1.
0 and the seal device 12, the contact portion of the seal device 12 with the guide rail 1, that is, the seal lip portion is difficult to roll up even if the slider 2 reciprocates. Leakage of internal grease to the outside is also reduced. Also, the lubricant-containing member 1
The lubricant that has exuded from 1 is the seal portion 1 of the seal device 12.
It is also supplied to the sealing lip which comes into contact with the guide rail 1 of No. 3, so that it also serves to reduce the wear of the sealing lip. Then, there is an advantage that the sealing performance of the seal portion 13 is maintained for a long period of time, foreign matter is prevented from entering the main body 2A side, and the life of the linear guide device itself is extended.

With the structure of this embodiment, the lubricant for the rolling elements is constantly supplied from the lubricant containing member 11, so the grease nipple mounting hole may be closed with a blind plug. If necessary, a lubricant such as grease may be supplied into the slider by opening it at a proper time. Further, even if the lubricant containing member 11 is directly applied to the end surface of the end cap 2B of the slider 2 without using the reinforcing plate 10 and the lubricant containing member 11 is sandwiched between the seal device 12 and the seal device 12 and arranged, The same function as in the case of the embodiment is obtained.

Further, in the above embodiment, the sealing device 1
The case where the second seal portion 13 is molded from rubber containing a lubricant has been described, but since the lubricant is supplied from the lubricant containing member 11 to the seal portion 13, the seal portion 13 is
May be NBR (acrylonitrile butadiene rubber) containing no lubricant. In addition, the sealing device 12 is attached to one end side 1 of the slider 2 in accordance with the atmospheric conditions (amount, size, shape, etc. of generated wood chips) at the location where the linear guide device is used.
A plurality of sheets may be attached instead of one sheet by one sheet. Further, the reinforcing plate 10 may be used in place of the lubricant containing member 11 so as to be sandwiched between the two sealing devices 12. Is also good.

Also, the self-lubricating function can be increased by making the lubricant-containing member 11 thicker, or by using a plurality of sheets in a stacked manner, depending on the atmospheric conditions of the place of use. Further, the linear guide device to which the present invention can be applied is not limited to the type of the above-described embodiment, and for example, the load rolling element rolling groove may be one other than two threads on one side, or the rolling element is not a ball. For example, it may be around.

[0044]

As described above, according to the invention of the linear guide device for woodworking according to the first aspect of the present invention, the lubricant which exudes gradually from the lubricant-containing member with time is sealed for a long period of time. Since it can be supplied to the seal lip of the device and the rolling elements, even if the rolling elements are smooth even in an atmosphere where many foreign substances such as wood chips having the property of absorbing the lubricant are generated and adhere to the guide rails. This has the effect of maintaining good rolling over a long period of time.

[Brief description of drawings]

FIG. 1 is a perspective view of a linear guide device for woodworking according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting state of each member at an end portion of the linear guide device of FIG.

FIG. 3 is a diagram showing a configuration of a lubricant-containing member according to an exemplary 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 a ring-shaped member attached.

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

FIG. 8 is an explanatory diagram of an operation.

FIG. 9 is a graph illustrating the relationship between the viscosity of the lubricant in the lubricant-containing member and the dimensional change of the member.

FIG. 10 is a graph in which the difference in wear on the groove surface of the rolling element rolling groove in the linear guide device for woodworking is measured with and without a lubricant-containing member (conventional) and with (invention).

FIG. 11 is a plan view of a conventional linear guide device for woodworking.

[Explanation of symbols]

 1 Guide rail 1a Upper surface 1b Side surface 2 Slider 2A Main body 2B End cap 3A, 3B Rolling element rolling groove 11 Lubricant containing member 12 Sealing device 13 Sealing part

Claims (1)

[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
A linear guide device for woodworking, comprising a sealing device for sealing an opening in a gap between a slider and a guide rail at an end portion of the slider to prevent invasion of wood chips, wherein a lubricant containing 30 to 90% by weight is used. A linear guide device for woodworking, wherein a lubricant-containing member made of rubber or synthetic resin that is gradually supplied to a seal portion of the seal device is attached between the seal device and an end portion of the slider.