JPH05172139A - Seal device for linear motion bearing - Google Patents

Abstract

PURPOSE:To provide a seal device which may surely prevent dust or the like from entering into a linear motion bearing so as to prolong the use life of a movable member. CONSTITUTION:A seal device 100 is attached to a movable member 20 of a linear motion bearing 10 at one end in a moving direction, and is resiliently urged toward the upper or side surface of a track bed 12, having an end surface in a shape complementary with the contour of the surfaces thereof to be urged, and having seal members 110, 120, 130 whose motion is restrained in the moving direction. The seal members 110, 120, 130 are made of metallic bearing materials, and are held between a pair of end surface plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a linear motion bearing used in a linear motion part of a machine tool, an industrial robot, or various general machines, and more particularly, it has a lot of dust like a woodworking machine. The present invention relates to a sealing device suitable for use in an environment.

[0002]

2. Description of the Related Art A bearing for linear motion comprising a way and a bearing moving body which moves along the way with a rolling element interposed between the way is usually provided with a sealing means. ing. The sealing means is for preventing dust and cutting debris (hereinafter referred to as "dust and the like") from invading the rolling element rolling groove of the raceway and the moving body, and also for the raceway and the motion. It is also to prevent the lubricant between the body and the body from leaking to the outside.

As the sealing means, as described in Japanese Utility Model Publication No. 62-43136, a contact-type means for mounting a thin plate-shaped sealing member such as rubber on a moving body to close a gap with a rail. There is. 26 and 27 show a linear motion bearing 300 including the sealing means described in the above publication. The seal member 310, as shown in FIG.
A pair of side plates 312, 314 and a pair of bottom plates 316, 318
Consists of. A seal member is fixed to each of the side plates 312 and 314.
The gap that opens in the axial direction between 2 and the moving body 320 is sealed. A seal member is fixed to each of the bottom plates 316 and 318, and the lip of the seal member has a rail 3
The gap that opens downward between 22 and the moving body 320 is sealed.

However, depending on the size and hardness of dust or the like adhering to the surface of the track 322 or the strength of the lip of the seal member, the dust or the like may pass through the seal member 310 and enter the inside of the moving body 320. In particular, when the bearing 300 for linear motion is attached to a woodworking machine of a woodworking factory, when it is used in an atmosphere with a lot of dust and the like, a large amount of fine dust and large dust are present in the seal member 310.
After passing through the inside of the moving body 320 and entering the rolling element rolling groove, it may be damaged before the life of the moving body main body of the linear motion bearing is reached. As a matter of course, in such a case, the lip of the seal member 310 is also damaged at an early stage, and the function as the sealing means is also lost.

Further, when the linear motion bearing is used in an atmosphere containing much dust as described above, the bellows 330 can be used together as shown in FIG. 29, but an extra mounting space is required. However, there are drawbacks such as increase in cost, increase in cost, and inability to attach the bellows when the length is limited. Moreover, when the bellows are expanded or contracted, dust or the like is sucked into the bellows from the lower opening of the bellows, and as a result, the linear motion bearing may be damaged before its life is expired.

Therefore, an object of the present invention is to provide a sealing device capable of reliably removing dust and the like adhering to the rail before entering the inside of the moving body. Thus, by removing the dust and the like, the life of the linear motion bearing can be extended.

[0007]

SUMMARY OF THE INVENTION The present invention provides a seal for a linear motion bearing comprising a way and a bearing moving body which moves along the way with rolling elements interposed between the way. A device, which is attached to the end of the moving body in the direction of movement, is elastically biased to the upper surface or the side surface of the track, and has an end face shape that complements the contour of the biased face, The problem is solved by a sealing device having a sealing member whose movement in the movement direction is restricted.

[0008]

The seal member is urged toward the upper surface or the side surface of the raceway, and foreign matter such as dust from the outside into the moving body is scraped off by the seal member and prevented from entering the inside. Further, since the seal member is constantly urged, the seal device of the present invention has a vibration absorbing effect in addition to the seal performance, and the running function of the moving body is also improved.

By sandwiching the side seal member and the upper seal member between a pair of end face plates, and urging between the end face plates, the side seal member and the upper seal member are attached to the end faces. It is guided without being tilted with respect to the plate, and accurately contacts the top and side surfaces of the track. Further, dust and the like adhering to the rolling element rolling grooves of the raceway are scraped off by the scraper function of the end face plate.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 17 show a first embodiment of a sealing device 100 for a linear motion bearing 10 according to the present invention. The sealing device 100 of the present embodiment can be suitably applied to, for example, the well-known end cap type linear motion ball bearing shown in FIGS. 1 and 7, and therefore this type of linear motion bearing will be described in detail below. ..

As shown in FIGS. 1 and 2, the long track 12 is provided with two upper and lower rolling element rolling grooves 14, 15, 16 and 17 extending axially on the left and right outer surfaces. ing. A saddle-shaped moving body 20 is provided so as to straddle the track base 12. The moving body 20 is a moving body main body 21.
And a pair of end caps 50, 50. As shown in FIG. 4, rolling element rolling grooves 24, 25, 26, 27 are formed on the inner surfaces of the left and right leg portions 22, 23 of the moving body main body 21. Rolling element rolling grooves 14, 15 of the way 12
16, 17 and rolling element rolling grooves 24, 2 of the moving body 21
A large number of rolling elements (not shown) are inserted between 5, 26 and 27. A ball is an example of the rolling element. The moving body 20 moves on the track 12 in the axial direction via the rolling elements.

The linear motion bearing 10 of this embodiment is
The rolling elements are the rolling element rolling grooves 14, 15, 16 of the raceway 12,
17 and rolling element rolling grooves 24, 25, 2 of the moving body 21
6 and 27 are angularly contacted at a contact angle of approximately 45 °, and the contact line between the rolling element rolling grooves 14 and 15 (or 16 and 17) of the upper and lower two rows on one side of the raceway 12 and the rolling element is In a cross section perpendicular to the axial direction of the way 12, it intersects with the outside of the way 12 at a substantially right angle (see FIG. 18), and the same rated load is applied to the load acting on the moving body main body 21 from the vertical and horizontal directions. It is also stable against moment load.

Next, the structure of the moving body 20 will be described. As described above, the moving body 20 includes the moving body main body 21 and the end caps 50 fixed to both end surfaces thereof. As shown in FIG. 4, the moving body main body 21 has left and right upper and lower portions corresponding to the rolling element rolling grooves 14, 15, 16, 17 of the track 12 on the inner surfaces of the left and right leg portions 22, 23 thereof. Two rolling element rolling grooves 24, 25, 26, 27 are formed respectively. Then, each rolling element rolling groove 24, 25,
Corresponding to 26 and 27, rolling element return holes 34, 35, 36, and 37 for returning the rolling elements are formed in the thick portions of the leg portions 22 and 23, two rows each on the left, right, top, and bottom. The screw holes 28 and 29 on both end surfaces of the moving body 21 are provided with end caps 5.
It is provided to fix 0 and 50 to the moving body 21. 38 and 39 are screw holes for fixing the sealing device 100 to the moving body main body.

5 and 6 show the end cap 50. The pair of end caps have the same structure. The end cap 50 has through holes 52, 54 and counterbore holes 56, 58. And the mounting bolt 7
0 and 72 are through holes 5 provided in the end cap 50.
The screw holes 28 and 29 of the main body 21 of the moving body are screwed through the screws 2 and 54. When the end cap 50 is fixed to the moving body 21, the heads of the mounting bolts 70 and 72 are buried in the counterbore holes 56 and 58. Reference numerals 62 and 64 are through holes.

In the screw holes 28 and 29 of the moving body 21,
Furthermore, annular recesses 40 and 41 are formed. The moving body main body 21 side of the through holes 52, 54 of the end cap 50 has an annular projection 66, which is fitted into the annular recesses 40, 41.
Has 68. Annular concave portions 40, 41 and annular convex portions 66,
By fitting 68, the end caps 50, 50
And the moving body 21 are positioned. The recesses 74, 76 of the end caps 50, 50 are bottom plate seals 210, 2 for vertically sealing as shown in FIG.
It is for fitting 20 to the moving body 20. Side portions 212, 214, 22 of the bottom plate seals 210, 220
2, 224 fit into the recesses 74, 76. Bottom plate seal 2
The bottom parts 216 and 226 of the 10,220 are the moving body 21.
Notches 48, 49 extending axially on the lower surface of the end caps 50, 50 and notches 78, 79 extending axially on the lower surface of the end caps 50, 50.
Fit in.

As shown in FIGS. 1 and 3, a grease nipple 44 is attached to a screw hole 42 formed on one side surface of the moving body main body 21, and grease or oil supplied from the grease nipple 44 is attached. Is a rolling element rolling groove 14, 1 through a feeding path (not shown) provided in the end caps 50, 50 through the feeding hole 46 of the moving body 21.
5, 16, 17, 24, 25, 26, 27. In the present embodiment, the grease nipple 44 is provided on the side surface of the moving body main body 21, but the end caps 50, 5 are not provided.
It can also be provided on the end face of 0.

The assembly of the linear motion bearing 10 is carried out, for example, in the middle of the upper and lower two rolling element rolling grooves 24, 25, 26, 27 of the left and right leg portions 22, 23 of the moving body main body 21, for example, as shown in FIG.
A retainer for preventing the rolling element from falling off is attached, the end cap 50 at one end is fixed to the moving body main body 21, and then between the rolling element rolling grooves 24, 25, 26, 27 and the retainer, and A rolling element is inserted into the rolling element return holes 34, 35, 36, 37, and then the end cap 50 is fixed to the other end of the moving body main body 21. Then, the pair of bottom plate seals 210 and 220 are attached to the recesses 7 of the end caps 50 and 50.
It fits in 4,76. The end caps 50, 50
Is formed by connecting the rolling element rolling grooves 24, 25, 26, 27 and the rolling element return holes 34, 35, 36, 37 to form a U-shaped rolling element direction changing path (for forming an infinite circulation path). It goes without saying that (not shown) is provided. Finally, the grease nipple 44 is screwed into the screw hole 42 on the side surface of the moving body 12 to complete the assembly of the linear motion bearing 10.

Next, the sealing device 100 will be described. Returning to FIGS. 1 and 2, the sealing device 100 of the present invention.
Is the rolling element rolling grooves 14, 15, 16, 17 of the raceway 12.
Pair of side seal members 11 for sealing the outer surface including
0, 120, an upper seal member 130 that seals the upper surface of the way 12, a compression spring 140, and a side seal member 1
A support member 150 for supporting the 10, 120 and the upper seal member 130, and a pair of end face plates 180, 190 for sandwiching the side seal members 110, 120, the upper seal member 130 and the support member 150 are provided. And
A pair of end plates 180, 190 and a supporting member 150
Are fixed to the respective axial (movement direction) end faces of the moving body by bolts 200 and 202.

The side seal members 110, 120 and the upper seal member 130 are made of metal bearing material. One example is white metal, which is well known in the field of plain bearings. White metal is used for the side seal member 110 of the present invention,
120 and the upper seal member 130 are the advantages that this material has (a) easy to fit, (b) hard to seize, (c) easy to fit,
The focus is on (d) good friction and wear resistance, and (e) good embedment of dust and dust.

As shown in FIG. 8, the side seal members 110 and 120 have an arcuate portion 1 which substantially coincides with the upper and lower two rolling element rolling grooves 14, 15, 16 and 17 on the side surface of the raceway 12.
It has 12, 114, 122, and 124, and has a shape that complements the contour of the side surface of the way 12. Recesses 116,1
The depth of 26 is set so as to receive an appropriate biasing force from the compression spring 140 of FIG. Alternatively, the compression spring 14
An appropriate biasing force can be generated by changing 0.

The upper seal member 130 has an end face shape that complements the contour of the upper surface of the track 12. Since the raceway 12 of the present embodiment has a flat upper surface, the upper seal member 130 has an elongated plate shape as shown in FIG. 132 is a recess for receiving the compression spring 140. FIG. 11 is a sectional view of FIG. As the upper seal member 130, one having another cross-sectional shape as shown in FIG. 12 or 13 can also be used.

The upper seal member 130 shown in FIG.
34 is flat. The contact surface 134 entirely contacts the upper surface of the rail 12. The upper seal member 13 of FIG.
0'has a pair of spaced outer edges 136, 136 extending in a direction perpendicular to the longitudinal direction of the track 12 on the contact surface 134 '. The outer edge portions 136 and 136 are in contact with each other at a plurality of points on the top surface of the track 12. The upper seal member 13 of FIG.
0 ″ has a plurality of tapered projections 138, 138 ... Which extend in a direction perpendicular to the longitudinal direction of the track 12 on the contact surface 134 ″. The liner contact of each tapered protrusion 138 with the upper surface of the rail 12 enhances the sealing effect. 132 ',
Each of the recesses 132 ″ is a recess for receiving the compression spring 140. The depths of the recesses 132 ′ and 132 ″ are set so as to receive an appropriate biasing force from the compression spring 140 of FIG. 9. Alternatively, the compression spring 140 may be changed to generate an appropriate biasing force.

14 and 15 are a perspective view and a bottom view of the support member 150. The support member 150 is the moving body 2
Saddle shape similar to 1. Upper part 152 and legs 16
Nos. 0 and 162 have cutouts 154, 164, and 166 inside. The notches 154, 164, 166 are shaped so that the side seal members 10, 120 and the upper seal member 130 fit together. A recess 156 for receiving the compression spring 140 is formed inside the upper portion 152. In the support member 150 of this embodiment, no recess is formed inside the leg portions 160 and 162, but the compression spring 140 is similar to the upper portion 152.
It is also possible to form a recess for receiving the. 170,1
72 is a through hole through which the bolts 200 and 202 are inserted.

The plate thickness of the side seal members 110, 120 and the upper seal member 130 is substantially the same as the plate thickness of the support member 150. Therefore, the side seal members 110 and 120 and the upper seal member 130 are formed by the pair of end face plates 18
Restrain the movement toward the way 12 between 0 and 190
You are being guided.

The end plate is the outer plate 180.
And inner plate 190. The outer plate 180 and the inner plate 190 have the same shape,
One of them is shown in FIG. Outer plate 1
The outer shape of the inner plate 190 and the inner plate 190 are substantially the same as the outer shape of the support member 150. The inner shape is similar to the contour of the trackway 12 and is dimensioned so as to have a slight gap with the trackway 12.

Support member 150, outer plate 180
And each through hole 170, 1 of the inner plate 190
The sealing device 100 is fixed to each end surface of the moving body 20 by bolts 200 and 202 passing through 72, 184, 186, 194 and 196. The material of the support member 150 and the end plates 180 and 190 is metal such as iron or aluminum alloy.

The sealing device 100 is assembled as follows. First, the moving body 20 is inserted into the rail 12. As shown in FIG. 1, the moving body 20 is moved to one end of the track 12. Inner plate 190, support member 15
0, the compression spring 140, the upper seal member 130, the compression spring 140, the side seal members 110 and 120, and the outer plate 180 are inserted into the track base 12 in this order, and the inner plate 190 is in close contact with the end surface of the end cap 50, and Bolts 200 and 202 so that each member is aligned
Tighten. Next, the moving body 20 is moved to the other end of the track 12 and the sealing device 100 is similarly fixed to the moving body 20. If the track 12 is extremely long, it is possible to fix the sealing device 100 to the moving body 20 on a track having a relatively short contour and then replace the track 12 with a longer track 12 that is actually used. Done.

The moving body 20 and the sealing device 100 which have been assembled are reciprocated on the track 12 several times. Both end surfaces of the side seal members 110, 120 and the upper seal member 130 are guided between a pair of end face plates 180, 190, and the contact surfaces of both seal members 110, 120, 130 are elastically guided by a compression spring 140. The surface of 12 is pressed. As the side seal members 110 and 120 and the upper seal member 130 are made of white metal that easily fits into other metals and is easily ground, the surface of the track 12 can be moved by reciprocating in this manner. The side seal members 110 and 120 and the upper seal member 13
0 will be imitated.

Next, the operation will be described. As shown in FIG. 17, foreign matter such as a large amount of chips such as relatively large woodwork pieces adhered to the surface of the way 12 is first removed from the outer plate 1.
Eliminate at 80. Way 12 and outer plate 18
The foreign matter such as relatively fine dust that has passed through the clearance C of 0 is the side seal members 110, 12 that come into close contact with the surface of the raceway 12.
0 and the upper sealing member 130 eliminates. In the sealing device 100 of the present invention, the outer plate 180, the side sealing members 110 and 120, and the upper sealing member 130 cooperate with each other to allow foreign matter to adhere to the surface of the track 12, such as welding spatter. It is scraped off by its function as a scraper. In this way, large foreign matter, fine dust, and further foreign matter such as hot welding spatter adhered to the surface of the raceway 12 are prevented from entering the moving body 20 by the sealing device 100. In addition, the side seal members 110 and 120 and the upper seal member 130.
In addition, since the surface of the track 12 is contacted and sealed by the urging force of the compression spring 140 at a substantially constant pressing surface (or line),
The sealing effect is remarkably higher than that of the conventional one in which the elasticity is simply the rubber seal. Further, since the upper seal member 130 absorbs the vibration acting on the moving body 20 due to the elastic force of the compression spring 140, the running performance of the moving body 20 is also improved.

The sealing device 100 of the present invention is effective even if it is used for the track way 12 shown in FIG. 18 which is generally used, but it can be applied to the way way shown in FIGS. 19, 21 and 22. When used, the sealing effect is further improved.
The track rail of FIG. 18 has a mounting hole 18 formed in the upper surface. The foreign matter collected in the holes 18 cannot be removed by the upper seal member 130. When foreign matter collected in the holes 18 scatters in the moving body 20, the rolling element rolling groove 1
Foreign matter is attached to 4, 15, 16, 17, 24, 25, 26 and 27, which is not preferable.

In FIG. 19, the way is shown in FIG.
The resin-made embedding plug 13 shown in FIG. As a result, the upper surface of the raceway 12 becomes flat without any depression, and the foreign matter is completely removed by the upper seal member 130. Rail way 1 shown in FIG. 21
2'is an inverted T-shape with a wide portion formed at the bottom. Holes 19 and 19 for fixing the raceway are formed in the wide portion, and the upper surface of the raceway 12 'is flat. The rail 12 'in the figure is such that foreign matter such as dust adhering to the upper surface thereof is completely removed by the upper seal member 130. The track rail 12 "shown in FIG.
Similar to the rail 12 'of FIG. 21, the top surface is flat so that foreign matter such as dust adhering to it is completely removed.

FIG. 23 shows a second sealing device according to the present invention.
An example is shown. Support member 250 in this embodiment
Has threaded holes 258, 268 in the upper portion 252 and legs 260, 262. A hexagon socket set screw 288 is screwed into the screw holes 258 and 268. Reference numeral 298 is a hexagon nut used to prevent loosening of each hexagon socket set screw 288. Since the present embodiment has such a structure, the compression spring 14 is set by the hexagon socket set screw 288.
A spring pressure of 0 can be adjusted. If there is no space to use the hexagon nut 298, after adjusting the spring pressure, a commercially available screw loosening preventive adhesive is used to attach the hexagon socket set screw 288 to the screw hole 258 of the support member 250.
It may be fixed to 268.

FIG. 24 shows a third embodiment of the sealing device according to the present invention.
An example is shown. The difference from the first and second embodiments is that a leaf spring 141 as shown in FIG. 25 is used instead of the compression spring 140. The side seal member 111 and the upper seal member 131 have protrusions 113 and 133 on both edges thereof. The leaf spring 141 is fixed to the protrusions 113 and 133 between both edges thereof, and the side seal member 1
11 and the upper seal member 131 are integrated. Further, similarly to the second embodiment, the spring pressure of the leaf spring 141 can be adjusted by using the hexagon socket set screw.

The sealing device shown in FIG. 28 can be used in combination with the above three embodiments. In the above embodiments, the end cap type linear motion ball bearing is applied with the sealing device, but the sealing device of the present invention is applied to the tube type linear motion ball bearing and the roller type linear motion bearing. Needless to say, it is also applicable. However, the illustrated embodiment is for the purpose of illustration and does not limit the present invention as a technical idea. Therefore, the present invention is not limited to a typical linear motion bearing having a shape in which a moving body straddles a trackway, and is appropriately applied if the shapes of the trackway and the moving body change. Is what you can do. In this specification, the terms “upper surface” and “side surface” are used with the typical arrangement relationship as shown in FIGS. 1 and 2 as a reference. However, it goes without saying that the actual usage is not limited to this.

[0035]

When the moving body moves in the axial direction of the raceway, the dust and the like adhering to the surface of the raceway can be reliably scraped off by the seal member, and the entry of dust and the like into the moving body can be prevented. it can.

Further, since the upper seal member is constantly elastically pressed against the upper surface of the track, the upper seal member has a vibration absorbing function in addition to the sealing function, so that the running function of the moving body is improved. There are secondary effects.

In the seal device of the second aspect, since the seal member is made of a metal bearing material, it has effects such as easy fitting to the rail, less seizure, and good wear resistance.

In the sealing device of the third aspect, since the upper sealing member and the side sealing member are constrained and guided between the end plates, the sealing performance is good by uniformly contacting the rail with the surface or line. effective.

In the sealing device of the fourth aspect, since the end face plate scrapes off relatively large dust and the like and the upper seal member and the side seal members remove relatively small dust and the like, foreign matter such as welding spatter is generated. Even when using a linear motion bearing in an atmosphere that adheres to the rail,
It is possible to reliably prevent foreign matter from entering the exercise body.

[Brief description of drawings]

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

FIG. 2 is a front view of a sealing device in which a part of an outer plate is broken.

FIG. 3 is a side view of a linear motion bearing and a seal device.

FIG. 4 is a perspective view of a moving body main body.

FIG. 5 is a perspective view of an end cap fixed to an end surface of a moving body main body.

6 is a sectional view taken along line 6-6 of the end cap of FIG.

FIG. 7 is a perspective view of a bottom plate seal.

FIG. 8 is a perspective view of a side seal member.

FIG. 9 is a front view of a compression spring.

FIG. 10 is a perspective view of an upper seal member.

11 is a sectional view taken along line 11-11 of the upper seal member of FIG.

FIG. 12 is a cross-sectional view of another upper seal member.

FIG. 13 is a cross-sectional view of still another upper seal member.

FIG. 14 is a perspective view of a support member.

FIG. 15 is a bottom view of the support member.

FIG. 16 is a perspective view of an end face plate.

FIG. 17 is a cross-sectional view showing the operation of the sealing device of the present invention.

FIG. 18 is a cross-sectional view of a raceway of a linear motion bearing.

FIG. 19 is a cross-sectional view of another rail way.

20 is a perspective view of an embedding plug fitted in a hole of the raceway of FIG. 19. FIG.

FIG. 21 is a sectional view of another rail way.

FIG. 22 is a sectional view of still another way.

FIG. 23 is a front view including a partial cross section of a second embodiment of the sealing device according to the present invention.

FIG. 24 is a front view of a third embodiment of the sealing device according to the present invention.

25 is a perspective view of a leaf spring used in the sealing device of FIG. 25. FIG.

FIG. 26 is a sectional view of a conventional linear motion bearing.

27 is a top view of the linear motion bearing of FIG. 26. FIG.

FIG. 28 is a perspective view of a conventional seal member.

FIG. 29 is a side view of another conventional sealing device.

[Explanation of symbols]

 10 Linear Motion Bearings 12, 12 ', 12 "Rail Track 20 Moving Body 100 Sealing Device 110, 111, 120 Side Sealing Member 130, 130', 130", 131 Upper Sealing Member 140 Compression Spring 141 Leaf Spring 150, 250 Support member 180 Outer plate (end face plate) 190 Inner plate (end face plate) 210, 220 Bottom plate seal

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 18, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

As a sealing means, Jitsuko Sho 62-431
As described in Japanese Patent Publication No. 36-36, there is a contact type in which a seal member such as a thin plate rubber is attached to a moving body to close a gap between the moving body and the raceway. 26 and 27 show a linear motion bearing 300 including the sealing means described in the above publication. Seal member 310, as shown in FIG. 28 (a), a pair of side plates 312, 314 and a pair of bottom plates 316, 318. As shown in FIG. 28 (b) and FIG. 28 (c), each side plate 312, 314 has
The seal member 313 is fixed, and the seal member 3
The lip 313 ′ of 13 seals the axially open gap between the track 322 and the moving body 320. A seal member 319 is fixed to each of the bottom plates 316 and 318, and a lip 319 ′ of the seal member 319 seals a gap between the track base 322 and the moving body 320 that opens downward.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

However, depending on the size and hardness of dust or the like adhering to the surface of the track 322 or the strength of the lip of the seal member, the dust or the like may pass through the seal member 310 and enter the inside of the moving body 320. In particular, when the bearing 300 for linear motion is attached to a woodworking machine of a woodworking factory, when it is used in an atmosphere with a lot of dust and the like, a large amount of fine dust and large dust are present in the seal member 310.
Passing through the inside of the moving body 320, rolling element rolling groove
To break into the rolling element and the rolling element rolling grooves before reaching the life of the moving body main body of the linear motion bearings it was sometimes being damaged. As a matter of course, in such a case, the lip of the seal member 310 is also damaged at an early stage, and the function as the sealing means is also lost.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 17 show a first embodiment of a sealing device 100 for a linear motion bearing 10 according to the present invention. The sealing device 100 of the present embodiment can be suitably applied to, for example, the well-known end cap type linear motion ball bearing shown in FIG. 1, so that this type of linear motion bearing will be described in detail below.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Next, the structure of the moving body 20 will be described. As described above, the moving body 20 includes the moving body main body 21 and the end caps 50 fixed to both end surfaces thereof. As shown in FIG. 4, the moving body main body 21 has left and right upper and lower portions corresponding to the rolling element rolling grooves 14, 15, 16, 17 of the track 12 on the inner surfaces of the left and right leg portions 22, 23 thereof. Two rolling element rolling grooves 24, 25, 26, 27 are formed respectively. Then, each rolling element rolling groove 24, 25,
Corresponding to 26 and 27, rolling element return holes 34, 35, 36, and 37 for returning the rolling elements are formed in the thick portions of the leg portions 22 and 23, two rows each on the left, right, top, and bottom. The screw holes 28, 29 on both end surfaces of the moving body 21 are sealed by the sealing device 100.
Is provided for fixing the to the moving body main body 21. Three
8, 39 are end caps 50, 50 for the moving body 21.
It is a screw hole for fixing to .

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

In the screw holes 28 and 29 of the moving body 21,
Furthermore, annular recesses 40 and 41 are formed. On the moving body main body 21 side of the through holes 62 , 64 of the end cap 50, an annular convex portion 66, which fits into the annular concave portions 40, 41,
68 is formed . By fitting the annular concave portions 40, 41 and the annular convex portions 66, 68, the end cap 5
Positioning between 0 and 50 and the moving body 21 is performed. The recesses 74, 76 of the end caps 50, 50 are bottom plate seals 2 for sealing in the vertical direction as shown in FIG.
It is for fitting 10, 220 to the moving body 20. Side portions 212, 21 of the bottom plate seals 210, 220
4, 222 and 224 fit into the recesses 74 and 76. The bottom portions 216, 226 of the bottom plate seals 210, 220 include notches 48, 49 extending axially in the lower surface of the moving body 21 and notches 7 extending axially in the lower surfaces of the end caps 50, 50.
It fits in 8,79.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

The assembly of the linear motion bearing 10 is carried out, for example, in the middle of the upper and lower two rolling element rolling grooves 24, 25, 26, 27 of the left and right leg portions 22, 23 of the moving body main body 21, for example, as shown in FIG.
A retainer indicated by reference numeral 324 is attached to prevent the rolling element from falling off, and the end cap 50 at one end is attached to the moving body main body 2
1 and then rolling elements rolling grooves 24, 25, 26, 2
7 and retainer, and rolling element return holes 34, 35, 3
The rolling elements are put in 6, 37, and then the end cap 50 is fixed to the other end of the moving body 21. Then, the pair of bottom plate seals 210, 220 are attached to the end caps 50,
It is fitted in the recesses 74 and 76 of the 50. The end caps 50, 50 have rolling element rolling grooves 24, 25, 26, 2 respectively.
It goes without saying that a rolling element direction changing path (not shown) curved in a U shape for connecting the rolling element return holes 34, 35, 36 and 37 to form an infinite circulation path is provided. Finally, the grease nipple 44 is attached to the moving body 12
Then, the assembly of the linear motion bearing 10 is completed.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

14 and 15 are a perspective view and a bottom view of the support member 150. The support member 150 is the moving body 2
Saddle shape similar to 1. Upper part 152 and legs 16
Nos. 0 and 162 have cutouts 154, 164, and 166 inside. The notches 154, 164, 166 have a shape in which the side seal members 110 , 120 and the upper seal member 130 fit together. A recess 156 for receiving the compression spring 140 is formed inside the upper portion 152. In the support member 150 of the present embodiment, no recess is formed inside the leg portions 160 and 162, but the compression spring 14 is similar to the upper portion 152.
It is also possible to form a recess for receiving 0. 170,
Reference numeral 172 is a through hole through which the bolts 200 and 202 are inserted.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

The raceway shown in FIG. 19 has a resin plug 13 shown in FIG. 20 fitted in the opening of the hole 18. As a result, the upper surface of the raceway 12 becomes flat without any depression, and the foreign matter is completely removed by the upper seal member 130. The track rail 12 'shown in FIG. 21 is an inverted T-shape with a wide portion formed in the lower portion. Holes 19 and 19 for fixing the raceway are formed in the wide portion, and the upper surface of the raceway 12 'is flat.
The rail 12 'in the figure is such that foreign matter such as dust adhering to the upper surface thereof is completely removed by the upper seal member 130. Rail way 12 "shown in FIG.
Similar to the rail 12 'of FIG. 21, the upper surface is flat and foreign matter such as dust adhering thereto is completely removed.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

[0033] Figure 24, the third by that the sealing device of the present invention
An example is shown. The difference from the first and second embodiments is that a leaf spring 141 as shown in FIG. 25 is used instead of the compression spring 140. The side seal member 111 and the upper seal member 131 have protrusions 113 and 133 on both edges thereof. The leaf spring 141 is fixed to the protrusions 113 and 133 between both edges thereof, and the side seal member 1
11 and the upper seal member 131 are integrated. Itaba
The rib 141 abuts the support member 150 '. Further, similarly to the second embodiment, the leaf spring 1 is used by using a hexagon socket set screw.
The spring pressure of 41 can also be adjusted.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] Fig. 28

[Correction method] Change

[Correction content]

28A is a perspective view of a conventional seal member, and FIG.
Is a sectional view taken along line bb of (a), and (c) is a line taken along line cc of (a).
FIG .

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 29

[Correction method] Change

[Correction content]

Figure 29 is a side view of a combination with conventional sheet Lumpur apparatus bellows.

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure Amendment 13]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 24

[Correction method] Change

[Correction content]

FIG. 24

[Procedure Amendment 14]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 26

[Correction method] Change

[Correction content]

FIG. 26

[Procedure Amendment 15]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 28

[Correction method] Change

[Correction content]

FIG. 28

Claims (4)

[Claims] 1. A seal device for a linear motion bearing comprising a rail and a bearing moving body which moves along the rail with rolling elements interposed between the rail and the rolling body. Attached to the end portion in the direction of movement of the rail, elastically biased against the upper surface or the side surface of the way, and having an end face shape that complements the contour of the biased surface, and is restrained from moving in the direction of movement. A seal device for a linear motion bearing, which has a seal member. 2. The seal device according to claim 1, wherein the seal member is made of a metal bearing material. 3. A pair of end face plates and a support member sandwiched between the end face plates are further provided, wherein the seal member is composed of an upper seal member and a side seal member and is constrained between the end face plates. The sealing device according to claim 1 or 2. 4. The sealing device according to claim 3, wherein the inner peripheral edge of each of the end face plates is formed along the contours of the upper surface and the side surface of the track base, and has a slight gap between the upper surface and the side surface. ..