JP6443062B2 - Side seal for linear motion guide device - Google Patents

Description

  The present invention relates to a side seal used by being fixed to an end portion in a moving direction of a slider constituting a linear motion guide device.

A conventional example of a linear motion guide device is shown in FIG. The linear motion guide device includes a guide rail 100, a slider (also referred to as a “bearing”) 200, and a plurality of rollers (rolling elements) 300. The guide rail 100 and the slider 200 have rolling surfaces 110 and 210 that face each other and form a rolling path of the roller 300.
The slider 200 is divided in the length direction of the guide rail 100 into a slider main body 201, end caps 202 fixed to both ends thereof, and side seals 203 fixed to both ends thereof. The rolling surface 210 is formed on the slider body 201. The side seals 203 disposed at both ends of the slider 200 in the linear motion direction seal the space between the slider 200 and the upper surface and both side surfaces of the guide rail 100 with lip portions.

The slider 200 also has a return path 221 of the roller 300 and a direction changing path 222 that connects the return path 221 and the rolling path. The return passage 221 is formed in the slider body 201, and the direction changing path 222 is formed in the end cap 202. A female screw 205 for attaching a table or the like with screws is formed on the upper surface of the slider 200.
Mounting holes for the grease nipple 400 are formed in the side seal 203 and the end cap 202. Lubricant is introduced from the grease nipple 400 into the oil passage of the end cap 202 to lubricate the linear motion guide device. The side seal 203 and the end cap 202 are fixed to the slider body 201 with bolts 500. The guide rail 100 is formed with an attachment hole 120 for attaching the guide rail 100 to the attached portion such as a base with a bolt.

In this linear motion guide device, a rolling path of the rolling element is constituted by the rolling path, the return path, and the direction changing path, and one of the guide rail 100 and the slider 200 is connected via a roller 300 circulating in the circulating path. Moves linearly relative to the other.
As a conventional example of the side seal of such a linear motion guide device, a base portion of a rubber seal member is fixed to a metal holding plate, and a lip portion of the seal member is brought into contact with an upper surface and both side surfaces of a guide rail. What is used. Further, it has also been proposed that the side seal is constituted by a separately formed seal member, a holding member that holds the seal member, and a cover (scraper).

  In Patent Document 1, a side seal holding member (case portion) and a seal member (seal portion) having a lip portion (seal lip) are configured as separate members, and a guide rail is provided on the opposite side of the seal member holding member. It is described that a scraper portion is provided to be opposed to the outer surface with a gap. The holding member and the seal portion are engaged with each other with a concave and convex fit. According to this side seal, a relatively large foreign matter is first removed at the scraper portion, so that the life of the seal lip is extended and the operability is improved.

In Patent Document 2, in a side seal composed of a seal member, a holding plate (holding member), and a cover, for the purpose of preventing a drop in the dust resistance and wear resistance of the seal member and dropping from the holding plate, It describes that the holding plate is provided with an alignment portion of the seal member and a gap is provided between the concave portion of the holding plate and the seal member.
Regarding prevention of damage to the lip portion of the side seal, Patent Document 3 discloses that when the slider of the linear motion guide device is moved from the temporary shaft to the guide rail, the side seal fixed to the slider is prevented from being damaged. For this purpose, it is described that a thin plate-like projecting portion is provided along the entire outer periphery of the temporary shaft at the axial end portion of the temporary shaft.

Japanese Patent Laid-Open No. 2007-211900 Japanese Patent No. 5316700 JP 2008-82504 A

Conventionally, the linear motion guide device may be used with a rail cover disposed on the upper surface of the guide rail, or may be used without a rail cover. When the rail cover is disposed, the upper surface of the guide rail is positioned higher by the thickness of the rail cover.
In machine tools, etc., a linear motion guide device is connected to a guide rail with a rail cover on the upper surface and a guide rail without a rail cover, and the slider is moved back and forth across these guide rails. May be used. In this case, when transferring from the guide rail where the rail cover is not disposed to the guide rail where the rail cover is disposed, the lip portion of the side seal has a large stress, which may cause damage to the lip portion.

  An object of the present invention is to connect a guide rail having a rail cover on the upper surface and a guide rail not having a rail cover on the upper surface, and reciprocating the slider over both of the guide rails. When used, it is difficult to cause breakage in the lip portion of the side seal.

In order to solve the above problems, the side seal of the linear motion guide device according to the first aspect of the present invention is a side seal that is used by being fixed to the slider moving direction end of the slider constituting the linear motion guide device. The present invention has the following configurations (1) to (4).
(1) It has a first plate-like member, a seal member, and a second plate-like member that are separately formed, and the seal member and the second plate-like member along the moving direction of the slider It arrange | positions between plate-shaped members.

(2) The first plate-like member includes an upper plate portion and both side plate portions facing each other with a gap between the upper surface and both side surfaces of the guide rail constituting the linear motion guide device. The second plate-like member includes an upper plate portion and both side plate portions that face the upper surface and both side surfaces of the guide rail with a gap therebetween.
(3) The seal member includes a lip portion that is brought into contact with an upper surface and side surfaces of the guide rail, and a base portion that is sandwiched between the first plate member and the second plate member, and the lip The portion bends at a predetermined angle from the base portion. A concave portion is formed on the first surface which is the base end side where the lip portion of the base portion is bent.

(4) The surface roughness of the seal engagement surface of the first plate-like member that is in contact with the first surface is the second plate-like member that is in contact with the second surface that is the surface opposite to the first surface. Finer than the surface roughness of the seal engagement surface.
The side seal of the linear motion guide device according to the second aspect of the present invention is a side seal that is used by being fixed to the slider moving direction end of the slider constituting the linear motion guide device. 3) and the following configuration (5).

(5) The concave portion divides the base portion into a distal end portion on the lip portion side and a proximal end portion on the opposite side, and the first surface is a distal end surface that is a surface of the distal end portion and the proximal end portion. It is divided into the base end face which is the surface of Of the seal engagement surface of the first plate-like member that is in contact with the first surface, the surface roughness of the portion (inward portion) with which the tip end surface is in contact is the portion with which the base end surface is in contact (outside) And the surface roughness of the seal engagement surface of the second plate-like member with which the second surface, which is the surface opposite to the first surface, contacts.

The side seal for the linear motion guide device according to the third aspect of the present invention is a side seal that is used by being fixed to the slider moving direction end of the slider that constitutes the linear motion guide device. (17).
(11) It has a seal member, a holding plate and a cover which are separately formed. The seal member and the holding plate are disposed closer to the slider than the cover.

(12) The seal member includes an upper seal portion having a lip portion that is brought into contact with an upper surface of a guide rail constituting the linear motion guide device, and each side seal portion having a lip portion that is brought into contact with each side surface of the guide rail. Consists of. The upper seal part and the side seal part have a base part held by the holding plate.
(13) The holding plate includes an upper plate portion and both side plate portions that face the upper surface and both side surfaces of the guide rail with a gap therebetween. The cover includes an upper portion and both side portions that face the upper surface and both side surfaces of the guide rail with a gap therebetween.

(14) The holding plate has a seal holding portion on one surface in the thickness direction for holding the base portion by fitting the unevenness. The base portion is held by the seal holding portion.
(15) One of both sides of the holding plate in the thickness direction is in contact with the slider side surface, and the other is in contact with the cover. The base has a contact surface with respect to the surface on the cover or the slider side.

(16) The holding plate is formed of a harder rubber material than the seal member.
(17) The upper plate portion of the holding plate has a through hole that extends in the plate thickness direction above the seal holding portion of the upper seal portion and extends along the width direction of the guide rail.
The linear seal guide side seal according to the fourth aspect of the present invention is characterized by having the above-mentioned configurations (11) to (17) and the following configurations (18) and (19).

(18) A side seal that is used by being fixed to the slider moving direction end of the slider that constitutes the linear motion guide device, the guide rail having the rail cover disposed on the upper surface and the guide rail having no rail cover disposed And the slider is reciprocated across both the guide rails.
(19) The surface on the slider side and the surface on the holding plate side of the cover are formed so that the surface roughness has a preset value. When the lip portion of the seal member rides on the rail cover in the use state of the linear motion guide device, the set value is a portion below the through hole of the upper plate portion of the holding plate and The surface roughness is such that the seal member can be allowed to rise with a reduced vertical dimension of the through hole.

  The side seal of the present invention connects a linear motion guide device to a guide rail with a rail cover disposed on the upper surface and a guide rail not disposed with a rail cover, and reciprocates the slider across both of the guide rails. When used, the occurrence of breakage in the lip portion is suppressed.

It is a perspective view which shows the seal member which is a side seal component of 1st embodiment, a 1st plate-shaped member, a 2nd plate-shaped member, and a space | interval holding member. It is a front view which shows the sealing member of 1st embodiment. It is AA sectional drawing of FIG. It is sectional drawing which shows the upper part part of the guide rail of the state which attached the side seal of 1st embodiment to the linear motion guide apparatus, (a) is the state of the side seal on the guide rail in which the rail cover is not arrange | positioned (B) shows the state of the side seal when transferring from the guide rail where the rail cover is not arranged to the guide rail where the rail cover is arranged, and (c) is the side on the guide rail where the rail cover is arranged. The state of the seal is shown. It is a partial expanded sectional view of the sealing member which shows the example of the cross-sectional shape of a recessed part. It is sectional drawing which shows the upper part part of the guide rail of the state which attached the side seal of 2nd embodiment to the linear guide apparatus, Comprising: (a) is the state of the side seal on the guide rail in which the rail cover is not arrange | positioned (B) shows the state of the side seal when transferring from the guide rail where the rail cover is not arranged to the guide rail where the rail cover is arranged, and (c) is the side on the guide rail where the rail cover is arranged. The state of the seal is shown. It is a perspective view which shows the seal member which is a side seal component of 3rd embodiment, a 1st plate-shaped member, a 2nd plate-shaped member, and a space | interval holding member. It is a front view which shows the sealing member of 3rd embodiment. It is AA sectional drawing of FIG. It is a front view which shows the holding plate of 3rd embodiment. It is BB sectional drawing of FIG. It is sectional drawing which shows the upper part part of the guide rail of the state which attached the side seal of 3rd embodiment to the linear motion guide apparatus, (a) is the state of the side seal on the guide rail in which the rail cover is not arrange | positioned (B) shows the state of the side seal on the guide rail on which the rail cover is arranged. It is a partially broken perspective view which shows the prior art example of a linear guide apparatus.

Hereinafter, although each embodiment of this invention is described, this invention is not limited to these embodiments.
[First embodiment]
<About configuration>
The side seal 10 of this embodiment can be used in place of the side seal 203 of the linear motion guide device shown in FIG. 13, and includes the seal member 1, the first plate member 2, and the shape shown in FIG. It consists of a second plate-like member 3 and a spacing member 4.

As shown in FIG. 2, the seal member 1 is arranged as viewed from the front side, and is disposed on the upper side of the guide rail 100 (FIG. 13) and on the left and right sides of the guide rail 100. It is divided into a side seal portion 1b.
The upper seal portion 1 a has a lip portion 11 a that is brought into contact with the upper surface of the guide rail 100. The side seal portion 1 b has a lip portion 11 b that is brought into contact with the left and right side surfaces of the guide rail 100. The upper seal portion 1 a and the side seal portion 1 b have a base portion 12 that is sandwiched between the first plate-like member 2 and the second plate-like member 3. That is, the seal member 1 is divided into the lip portion 11 and the base portion 12 in each direction in which the upper seal portion 1a and the side seal portion 1b face the guide rail.

  As shown in FIG. 3, the lip portion 11 of the seal member 1 is inclined from the first surface 13 side which is one surface in the thickness direction of the seal member 1 to the second surface 14 side which is the opposite surface. doing. In the base 12 of the seal member 1, a recess 121 is formed on the first surface 13 that is the base end side where the lip 11 is bent. The base portion 12 is divided into a base end portion 122 and a tip end portion 123 by the recess 121. The first surface 13 is divided into a distal end surface 13 a that is the surface of the distal end portion 123 and a proximal end surface 13 b that is the surface of the proximal end portion 122.

The recess 121 includes a bottom surface 121a, a wall surface 121b on the proximal end portion 122 side, and a wall surface 121c on the distal end portion 123 side. The bottom surface 121a, the wall surface 121b, and the wall surface 121c are smoothly connected.
As shown in FIG. 1, each of the first plate-like member 2 and the second plate-like member 3 has substantially the same surface shape as the end cap 202 (FIG. 13) constituting the slider 200 (FIG. 13). The upper part 21 and 31 which opposes the upper surface of the rail 100 (FIG. 13) with a clearance gap, and the side parts 22 and 32 which oppose the left and right side surfaces of the guide rail 100 (FIG. 13) with a clearance gap.

The upper portions 21 and 31 are formed with through holes 23 and 33 through which the bolts 500 (FIG. 13) are passed and through holes 24 and 34 to which the grease nipple 400 (FIG. 13) is attached. The side portions 22 and 32 are formed with through holes 23 and 33 through which the bolt 500 (FIG. 13) is passed.
As shown in FIG. 1, the spacing member 4 includes an upper part 41 that faces the upper surface of the guide rail with a gap and a side part 42 that faces the left and right side surfaces of the guide rail with a gap. That is, the spacing member 4 has substantially the same surface shape as the first plate-like member 2 and the second plate-like member 3 except for the line indicating the surface 40 facing the guide rail.

  The surface 40 facing the guide rail of the spacing member 4 exists outside the surfaces 20 and 30 facing the guide rails of the first plate member 2 and the second plate member 3. The seal member 1 is disposed inside the surface 40 of the spacing member 4 facing the guide rail. A through hole 43 through which the bolt 500 (FIG. 13) is passed and a through hole 44 to which the grease nipple 400 (FIG. 13) is attached are formed in the upper portion 41 of the spacing member 4, and the bolt 500 (FIG. 13) A through-hole 43 is formed through.

<About surface roughness>
The surface roughness is different between the seal engagement surface 28 facing the seal member 1 side of the first plate member 2 and the seal engagement surface 38 facing the seal member 1 side of the second plate member 3. The seal engagement surface 28 of the first plate-like member 2 is a surface with which the first surface 13 of the seal member 1 is in contact with the side seal. The seal engagement surface 38 of the second plate-shaped member 3 is a surface with which the second surface 14 of the seal member 1 is in contact with the side seal 10.

The seal engagement surface 28 of the first plate-like member 2 has a surface roughness finer than that of the seal engagement surface 38 of the second plate-like member 3. Further, as shown in FIG. 4B, the surface roughness of the seal engagement surface 28 is such that when the lip portion 11a of the seal member 1 rides on the rail cover 5 in the use state of the linear motion guide device, the seal member Slip occurs between the first surface 13 and the first portion 13 so that the base 12 can be deformed in such a direction as to narrow the interval between the recesses 121.
Further, the surface roughness of the seal engagement surface 38 is between the second surface 14 of the seal member 1 when the lip portion 11a of the seal member 1 rides on the rail cover 5 in the use state of the linear motion guide device. The value is less likely to slip.

<About material>
The seal member 1 is made of rubber or a thermoplastic elastomer. Examples of the rubber to be used include nitrile rubber, acrylic rubber, silicone rubber, and fluorine rubber. Examples of the thermoplastic elastomer include polyester elastomers and urethane elastomers. The spacing member 4 is made of a synthetic resin such as POM (polyoxymethylene). The first plate member 2 and the second plate member 3 are made of metal such as SUS304.

<About action and effect>
As shown in FIG. 4, the side seal 10 of this embodiment is used by being fixed to the moving direction end of the slider 200. FIG. 4 shows a cross section of the upper part of the guide rail.
Specifically, first, the first plate-like member 2, the seal member 1, and the second plate-like member 3 are arranged in this order at the slider moving direction end of the end cap 202 constituting the slider 200, and the seal member is arranged. One lip portion 11 a is brought into contact with the upper surface 101 of the guide rail 100. Next, the spacing member 4 is disposed between the first plate member 2 and the second plate member 3 so as to surround the seal member 1 from the outside.

Next, the bolt 500 (FIG. 13) is inserted through the through hole 33 of the second plate member 3, the through hole 43 of the spacing member 4, and the through hole 23 of the first plate member 2. It is screwed into the female screw of the slider body 201 through the through hole.
As a result, as shown in FIG. 4, the seal engagement surface 28 of the first plate-like member 2 comes into contact with the distal end surface 13 a and the proximal end surface 13 b which are the first surfaces 13 of the seal member 1, and the second The seal engagement surface 38 of the plate-like member 3 is in contact with the second surface 14 of the seal member 1.

In the first case where the rail cover 5 is not disposed on the upper surface 101 of the guide rail 100, the lip portion 11a of the upper seal portion 1a contacts the upper surface 101 of the guide rail 100 as shown in FIG. To do.
As shown in FIG. 4B, when the slider 200 moves from the guide rail 100 where the rail cover 5 is not disposed to the guide rail 100A where the rail cover 5 is disposed, the side seal 10 is as follows. Behave.

  Since the surface roughness of the seal engagement surface 28 of the first plate-like member 2 and the seal engagement surface 38 of the second plate-like member 3 is the above value, the first surface 13 of the seal member 1 and the first A slip occurs between the plate-like member 2 and the seal engaging surface 28, and the first surface 13 side of the base 12 of the seal member 1 is deformed in a direction to narrow the interval between the recesses 121. Due to the deformation of the base portion 12, the impact applied to the lip portion 11a is alleviated, so that the seal member 1 is hardly damaged. Further, the position of the base 12 on the second surface 14 side is maintained.

After riding on the guide rail 100A on which the rail cover 5 is disposed, as shown in FIG. 4C, the deformation on the first surface 13 side of the base portion 12 of the seal member 1 is eliminated, and FIG. The bending angle of the lip portion 11a is smaller than in the case of a).
When the surface roughness of the seal engagement surface 28 of the first plate-like member 2 and the seal engagement surface 38 of the second plate-like member 3 are the same, the slider 200 is a guide in which the rail cover 5 is not disposed. When transferring from the rail 100 to the guide rail 100A where the rail cover 5 is disposed, it is assumed that the side seal 10 behaves as follows.

  If the same set surface roughness is a value that is difficult to slip with respect to each contact surface, the seal member 1 is unlikely to rise, and the lip portion 11a is likely to be damaged. If the surface roughness set to be the same is a value that is easy to slide with respect to each contact surface, the seal member 1 is not deformed as described above, and the entire seal member 1 simply rises. As a result, when the gap between the sealing member 1 and the facing surface 40 of the spacing member 4 is large, the sealing performance by the side seal 10 can be impaired by raising the sealing member 1 until it contacts the facing surface 40. There is also sex.

As described above, according to the side seal 10 of this embodiment, the linear guide device is connected to the guide rail 100A on which the rail cover 5 is disposed on the upper surface and the guide rail 100 on which the rail cover is not disposed. In the case of an application in which the slider is reciprocated across both guide rails, the lip portion is prevented from being damaged.
Further, in such an application, every time the side seal 10 gets over the rail cover 5, stress is applied to the recess 121 of the seal member 1, so stress concentrates on the recess 121 of the seal member 1, and the recess 12 is used as the start end. Cracks may occur. On the other hand, in the side seal 10 of this embodiment, since the bottom surface 121a, the wall surface 121b, and the wall surface 121c that form the recess 121 of the seal member 1 are smoothly connected, the occurrence of cracks is suppressed.
In addition, as shown in FIG. 5, generation | occurrence | production of the above cracks can also be suppressed by providing the recessed part 121A of the shape which has the curved-shaped bottom face 121c in the sealing member 1. FIG.

[Second Embodiment]
<About configuration>
As shown in FIG. 6, the side seal 10A of this embodiment has a first plate-like member 2A instead of the first plate-like member 2 constituting the side seal 10 of the first embodiment. Other points are the same as the side seal 10 of the first embodiment. FIG. 6 shows the upper portion 21A of the first plate-like member 2A.

<About surface roughness>
The surface roughness of the seal engagement surface 28 facing the seal member 1 side of the first plate-like member 2A is not uniform. The outer portion 28a with which the base end surface 13b of the base portion 12 contacts has the same surface roughness as the seal engagement surface 38 of the second plate-like member 3 with which the second surface 14 contacts, but the tip end surface 13a has the same surface roughness. The inwardly contacting inner part 28 b is formed finer than the seal engaging surface 38 of the second plate-like member 3.

Further, the surface roughness of the inner portion 28b of the seal engagement surface 28 is such that the lip portion 11a of the seal member 1 rides on the rail cover 5 as shown in FIG. At this time, slip occurs between the sealing member 1 and the first surface 13, and the base 12 has a value that can be deformed in such a direction as to narrow the interval between the recesses 121.
The surface roughness of the outer portion 28a of the seal engagement surface 28 is a value that prevents slippage between the seal engagement surface 28 and the first surface 13 of the seal member 1. Furthermore, the surface roughness of the seal engagement surface 38 is a value that hardly causes slipping between the seal engagement surface 38 and the second surface 14 of the seal member 1 during the above-described riding.

<About action and effect>
As shown in FIG. 6, the side seal 10 </ b> A of this embodiment is used by being fixed to the end portion in the moving direction of the slider 200. FIG. 6 shows a cross section of the upper part of the guide rail. The method of attaching the side seal 10A is the same as the method of the first embodiment.
In the first case where the rail cover 5 is not disposed on the upper surface 101 of the guide rail 100, the lip portion 11a of the upper seal portion 1a contacts the upper surface 101 of the guide rail 100 as shown in FIG. To do.

Further, as shown in FIG. 6B, when the slider 200 is transferred from the guide rail 100 where the rail cover 5 is not disposed to the guide rail 100A where the rail cover 5 is disposed, the side seal 10A is as follows. Behave.
Since the surface roughness of the outer and inner portions 28a and 28b of the seal engagement surface 28 of the first plate-like member 2 and the seal engagement surface 38 of the second plate-like member 3 is the above value, the seal Slip occurs between the front end surface 13a of the first surface 13 of the member 1 and the inner portion 28b of the seal engagement surface 28 of the first plate-like member 2, and the front end portion 123 of the base 12 of the seal member 1 becomes. , Deformation in the direction of narrowing the interval between the recesses 121. Due to the deformation of the distal end portion 123, the impact applied to the lip portion 11a is alleviated, so that the seal member 1 is hardly damaged. Further, the position of the base portion 12 on the second surface 14 side is maintained, and the base end portion 122 remains at the position of the base end portion surface 13 b of the first surface 13.

After riding on the guide rail 100A on which the rail cover 5 is disposed, as shown in FIG. 6 (c), the deformation of the distal end portion 123 of the base 12 of the seal member 1 is eliminated, and FIG. 6 (a). The bending angle of the lip portion 11a is smaller than in the case of.
As described above, according to the side seal 10A of this embodiment, like the side seal 10 of the first embodiment, the linear motion guide device includes the guide rail 100A having the rail cover 5 disposed on the upper surface and the rail cover. When the guide rails 100 that are not arranged are connected and the slider is reciprocated across both of the guide rails, it is possible to prevent the lip portion from being damaged.

  Moreover, in the side seal 10 of 1st embodiment, although deform | transforming not only to the front-end | tip part 123 but the base end part 122 in the state of FIG.4 (b), in the side seal 10A of this embodiment, it is FIG.6 (b). In the state, the deformation of the base end portion 122 is suppressed. Therefore, according to the side seal 10A of this embodiment, the effect that the durability of the base end portion 122 is higher than that of the side seal 10 of the first embodiment is also obtained.

[Third embodiment]
<About configuration>
The side seal 10B of this embodiment can be used in place of the side seal 203 of the linear motion guide device shown in FIG. 13 described above, and includes the seal member 1A, the holding plate 7 and the cover 8 having the shapes shown in FIG. Consists of. The holding plate 7 is disposed closer to the slider than the cover 8.

As shown in FIG. 8, the seal member 1 </ b> A is arranged as viewed from the front, and is arranged on the upper side of the guide rail 100 (FIG. 13) and on the left and right sides of the guide rail 100. It is divided into a side seal portion 1b.
The upper seal portion 1 a has a lip portion 11 a that is brought into contact with the upper surface of the guide rail 100. The side seal portion 1 b has a lip portion 11 b that is brought into contact with the left and right side surfaces of the guide rail 100. The upper seal portion 1 a and the side seal portion 1 b have a base portion 12 held by the holding plate 7. That is, the seal member 1A is divided into the lip portion 11 and the base portion 12 in each direction in which the upper seal portion 1a and the side seal portion 1b face the guide rail.

  As shown in FIG. 9, the base 12 of the seal member 1A has a recess 125 on the first surface in the thickness direction (the surface on the slider side). The base portion 12 is divided into a base end portion 122A and a front end portion 123A by the recess 125. The distal end portion 123A of the base portion 12 protrudes from the proximal end portion 122A toward the slider. That is, the first surface 113a of the distal end portion 123A is closer to the slider than the first surface 113b of the proximal end portion 122A. A second surface 114 (surface opposite to the slider) 114 in the thickness direction of the base portion 12 is the same at the base end portion 122A and the front end portion 123A. The lip portion 11 of the seal member 1A is inclined from the first surface 113a side to the second surface 114 side of the distal end portion 123A. Further, the second surface 114 of the base 12 is a contact surface with respect to the cover 8.

  As shown in FIGS. 7 and 10, the holding plate 7 has substantially the same surface shape as the end cap 202 (FIG. 13) constituting the slider 200 (FIG. 13), and is disposed on the upper side of the guide rail 100. It consists of a plate portion 71 and side plate portions 72 arranged on the left and right sides of the guide rail 100. A through hole 73 through which the bolt 500 (FIG. 13) is passed and a through hole 74 to which the grease nipple 400 (FIG. 13) is attached are formed in the upper plate portion 71. A through hole 73 through which the bolt 500 is passed is formed in the side plate portion 72. A seal holding portion 70 that holds the base portion 12 of the seal member 1A is formed inside the holding plate 7 (guide rail side).

  As shown in FIG. 11, the seal holding part 70 is formed in an uneven shape with respect to the one surface 7 a in the thickness direction of the holding plate 7. The seal holding part 70 includes a first concave part 75 in which the base end part 122 of the base part 12 of the sealing member 1A is fitted, a convex part 76 in which the concave part 121 of the base part 12 is fitted, and a second part in which the distal end part 123 of the base part 12 is fitted. It consists of a recess 77. The bottom surface 75 a of the first recess 75 is shallower than the bottom surface 77 a of the second recess 77. The front end surface 76 a of the convex portion 76 is a position between the bottom surface 75 a of the first concave portion 75 and the bottom surface 77 a of the second concave portion 77.

  As shown in FIGS. 7, 10, and 11, the upper plate portion 71 of the holding plate 7 penetrates in the plate thickness direction on the upper side (opposite side of the guide rail) of the seal holding portion 70 and extends in the width direction of the guide rail 100. It has an elongated slit (through hole) 78 extending along. As shown in FIGS. 7 and 10, the through hole 73 through which the bolt 500 passes and the through hole 74 to which the grease nipple 400 is attached are formed above the slit 78.

  As shown in FIG. 7, the cover 8 has substantially the same surface shape as the end cap 202 (FIG. 13) that constitutes the slider 200 (FIG. 13), and is spaced from the upper surface of the guide rail 100 (FIG. 13). It consists of the upper part 81 which opposes, and the side part 82 which opposes the left and right side surfaces of the guide rail 100 (FIG. 13) with a gap. The upper portion 81 is formed with a through hole 83 through which the bolt 500 (FIG. 13) is passed and a through hole 84 to which the grease nipple 400 (FIG. 13) is attached. The side portion 82 is formed with a through hole 83 through which the bolt 500 (FIG. 13) is passed.

<About surface roughness>
As shown in FIG. 12, in the attached state of the side seal 10B, one surface 7a in the thickness direction of the holding plate 7 contacts the cover 8, and the other surface 7b in the thickness direction is the end surface of the end cap 202 in the slider moving direction ( The slider side surface) 202a. Further, the second surface 114 of the seal member 1 </ b> A contacts the cover 8.

An end face (slider side face) 202a in the slider moving direction of the end cap 202 and a face 88 on the holding plate 7 side of the cover 8 are formed so that the surface roughness becomes a preset value. The set value of the surface roughness is lower than the through hole 78 of the upper plate portion 71 of the holding plate 7 when the lip portion 11a of the seal member 1A rides on the rail cover 5 in the use state of the linear motion guide device. This is the surface roughness that allows the portion and the seal member 1A to rise with the vertical dimension of the through hole 78 being reduced.
Here, the surface roughness of the surface 88 on the holding plate 7 side of the cover 8 is such that the portion above the through hole 78 of the holding plate 7 contacts, the portion below the through hole 78, and the seal member 1A. The second surface 88b may be changed to the above set value instead of the second surface 88b.

<About material>
The seal member 1A is made of rubber or a thermoplastic elastomer. Examples of the rubber to be used include nitrile rubber, acrylic rubber, silicone rubber, and fluorine rubber. Examples of the thermoplastic elastomer include polyester elastomers and urethane elastomers. The holding plate 7 is made of a harder rubber material than the seal member 1A. The cover 8 is made of metal such as SUS304.
As a combination of the materials of the seal member 1A and the holding plate 7, a combination in which the seal member 1A is fluororubber and the holding plate 7 is nitrile rubber or hydrogenated nitrile rubber can be given.

<About action and effect>
As shown in FIG. 12, the side seal 10 </ b> B of this embodiment is used by being fixed to the end portion in the moving direction of the slider 200. FIG. 12 shows a cross section of the upper part of the guide rail.
First, the base 12 of the seal member 1 </ b> A is held by the seal holding part 70 of the holding plate 7 with an uneven fit. That is, the base end portion 122 </ b> A of the base portion 12 is fitted to the second holding surface 75 of the seal holding portion 70, and the tip end portion 123 </ b> A is fitted to the second concave portion 77. Accordingly, the first surface 113b of the base end portion 122A is in contact with the bottom surface 75a of the second holding surface 75, and the first surface 113a of the tip end portion 123A is in contact with 77a.

Next, the side seal 10B is assembled by bringing the cover 8 into contact with the one surface 7a in the thickness direction of the holding plate 7 and the second surface 114 of the seal member 1A.
Next, the side seal 10B is disposed outside the end cap 202 that constitutes the slider 200, and the side seal is secured with a bolt 500 (FIG. 13) through which the through hole 83 of the cover 8 and the through hole 73 of the holding plate 7 are inserted. 10B is fixed to the slider 220.

  Accordingly, as shown in FIG. 12A, in the first case where the rail cover 5 is not disposed on the upper surface 101 of the guide rail 100, the lip portion 11 a of the upper seal portion 1 a is placed on the upper surface 101 of the guide rail 100. Contact. Further, the lip portion 11b of the side seal portion 1b contacts the side surface 102 (FIG. 13) and the rolling surface 110 (FIG. 13) of the guide rail 100. In this state, the holding plate 7 is not elastically deformed, and the vertical dimension of the through hole 78 maintains the original state.

  Next, as shown in FIG. 12B, when the slider 200 is transferred from the guide rail 100 where the rail cover 5 is not disposed to the guide rail 100A where the rail cover 5 is disposed, as shown in FIG. Since a greater drag force is applied to the seal member 1A from the guide rail 100A than in the state of FIG. 5, the upper plate portion 71 of the holding plate 7 bends around the through hole 78, and a portion below the through hole 78 of the upper plate portion 71 The sealing member 1 </ b> A rises, and the vertical dimension of the through hole 78 is reduced.

Further, since the surface roughness of the end surface 202a of the end cap 202 and the surface 88 of the cover 8 on the holding plate 7 side is the above set value, the lower side of the through hole 78 of the upper plate portion 71 of the holding plate 7 is provided. The portion and the seal member 1 </ b> A are allowed to rise while the vertical dimension of the through hole 78 is reduced.
Thereby, when the slider 200 is transferred from the guide rail 100 where the rail cover is not disposed to the guide rail 100A where the rail cover 5 is disposed, the impact applied to the lip portion 11a of the seal member 1A is reduced, and the seal member Damage to 1A is less likely to occur.

As described above, according to the side seal 10A of this embodiment, the linear motion guide device is connected to the guide rail 100A in which the rail cover 5 is disposed on the upper surface and the guide rail 100 in which the rail cover is not disposed. In the case of an application in which the slider is reciprocated across both guide rails, the lip portion is prevented from being damaged.
In this embodiment, the other surface 7 b in the thickness direction of the holding plate 7 is brought into contact with the end surface 202 a of the end cap 202. In other words, the end surface 202a of the end cap 202 is a “slider side surface”. However, a plate-like member having the same shape as the cover 8 is installed between the end cap 202 and the holding plate 7, and the holding plate 7 side. The surface may be a “slider-side surface”, and the surface roughness of the surface may be the above-described set value.

DESCRIPTION OF SYMBOLS 10, 10A, 10B Side seal 1 Seal member 1A Seal member 1a Upper side seal part 1b Side seal part 11 Lip part 11a Lip part made to contact the upper surface of a guide rail 11b Lip part made to contact the side surface of a guide rail 12 Base part 121 Seal member 1 concave portion 121a bottom surface of concave portion 121b wall surface on the proximal end side of the concave portion 121c wall surface on the distal end side of the concave portion 122, 122A base proximal portion 123, 123A base distal end portion 125 concave portion of the seal member 1B 13 seal member first One surface 13a Tip surface (first surface of the tip of the base)
13b Base end surface (first surface of the base end portion)
113a First surface of the distal end portion 123A 113b First surface of the base end portion 122A 14 Second surface of the seal member 1 114 Second surface of the seal member 1A (contact surface to the cover)
2 First plate member 21 Upper portion of first plate member 22 Side portion of first plate member 28 Seal engagement surface 28a of first plate member 28a Outer portion 28b of seal engagement surface Seal engagement surface Inward portion 3 Second plate member 31 Upper portion of first plate member 32 Side portion of first plate member 38 Seal engagement surface of second plate member 4 Spacing member 5 Rail cover 7 Holding plate 71 Upper part of holding plate 72 Side part of holding plate 70 Seal holding part 75 First concave part of seal holding part 75a Bottom face of first concave part 76 Convex part of seal holding part 76a Front end surface of convex part 77 No. of seal holding part Two recesses 77a Bottom surface of second recess 78 Slit holding part slit (through hole)
8 Cover 81 Upper part of the cover 82 Side part of the cover 88 Surface on the holding plate side of the cover 23, 33, 43, 73, 83 Through hole for passing the bolt 24, 34, 44, 74, 84 Through hole for installing the grease nipple DESCRIPTION OF SYMBOLS 100 Guide rail 101 Upper surface of guide rail 110 Rolling surface of guide rail 200 Slider 201 Slider body 202 End cap 202a End face of slider movement direction of end cap (slider side face)
203 Side seal 205 Female thread 210 Rolling surface of slider 221 Return path 222 Direction change path 300 Roller (rolling element)
400 Grease nipple 500 bolt

Claims (6)

A side seal that is used by being fixed to the slider moving direction end of the slider that constitutes the linear motion guide device,
A first plate member, a seal member, and a second plate member, which are separately formed; and the seal member includes the first plate member and the second plate member along a moving direction of the slider. Placed between and
The first plate-like member is composed of an upper plate portion and both side plate portions facing each other with a gap between the upper surface and both side surfaces of the guide rail constituting the linear motion guide device,
The second plate-like member is composed of an upper plate portion and both side plate portions facing each other with a gap between the upper surface and both side surfaces of the guide rail,
The seal member includes a lip portion that is brought into contact with the upper surface and each side surface of the guide rail, and a base portion that is sandwiched between the first plate-like member and the second plate-like member, Bend at a certain angle from the base,
A recess is formed on the first surface which is the base end side where the lip portion of the base is bent,
The surface roughness of the seal engagement surface of the first plate member that is in contact with the first surface is the seal engagement of the second plate member that is in contact with the second surface that is the surface opposite to the first surface. Side seal for linear motion guide device that is finer than the surface roughness of the mating surface. The concave portion divides the base portion into a distal end portion on the lip portion side and a proximal end portion on the opposite side, and the first surface includes a distal end surface that is a surface of the distal end portion and a surface of the proximal end portion. Divided into a base end face,
Of the seal engagement surfaces of the first plate-like member that is in contact with the first surface, the surface roughness of the portion that is in contact with the distal end surface is the surface roughness of the portion that is in contact with the proximal end surface, and The side seal for a linear motion guide device according to claim 1, wherein the surface roughness of the seal engagement surface of the second plate-like member that is in contact with the second surface that is the surface opposite to the first surface is smaller.   The side seal for a linear motion guide device according to claim 1 or 2, wherein the bottom surface of the recess and both wall surfaces are smoothly connected.   Between the first plate-like member and the second plate-like member, there is a spacing member disposed so as to surround the sealing member from the outside, and the spacing member is the first plate-like member and the second plate-like member. The side seal for a linear motion guide device according to any one of claims 1 to 3, wherein the side seal is fixed to the slider together with a second plate-like member. A side seal that is used by being fixed to the slider moving direction end of the slider that constitutes the linear motion guide device,
A seal member, a holding plate, and a cover that are separately formed; and the sealing member and the holding plate are disposed closer to the slider than the cover;
The seal member includes an upper seal portion having a lip portion that comes into contact with an upper surface of a guide rail constituting the linear motion guide device, and each side seal portion having a lip portion that comes into contact with each side surface of the guide rail. ,
The upper seal part and the side seal part have a base part held by the holding plate,
The holding plate is composed of an upper plate portion and both side plate portions facing each other with a gap between the upper surface and both side surfaces of the guide rail,
The cover is composed of an upper portion and both side portions facing the upper surface and both side surfaces of the guide rail with a gap therebetween,
The holding plate has a seal holding portion that holds the base portion by fitting uneven portions on one surface in the thickness direction, and the base portion is held by the seal holding portion,
One of both sides of the holding plate in the thickness direction is in contact with the slider side surface, the other is in contact with the cover,
The base has a contact surface with respect to the surface on the cover or the slider side,
The holding plate is formed of a rubber material harder than the seal member,
The side of the linear motion guide device, wherein the upper plate portion of the holding plate has a through hole that penetrates in the plate thickness direction above the seal holding portion of the upper seal portion and extends along the width direction of the guide rail. seal. A linear guide device side seal that is used by connecting a guide rail with a rail cover on the upper surface and a guide rail without a rail cover and moving the slider back and forth across both guide rails. There,
The surface on the slider side and the surface on the holding plate side of the cover are formed so that the surface roughness becomes a preset value,
When the lip portion of the seal member rides on the rail cover in the use state of the linear motion guide device, the set value is a portion below the through hole of the upper plate portion of the holding plate and The side seal for a linear motion guide device according to claim 5, wherein the seal member has a surface roughness that allows the vertical dimension of the through-hole to be increased and reduced.

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