JP2015218880A - Side rail of direct action guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side rail of a direct action guide device that comprises a seal member, a coupling member, a holding plate, and a cover which are separately formed and that can be used without replacing the seal member without reference to whether a rail cover is arranged on an upper face of a guide rail.SOLUTION: A base part of an upper rail part 1a of a seal member 1 and a coupling member 6 are held between a holding plate 3 and a cover 1 while engaged with each other in a projection-recess fitting manner. A lip part of the upper seal part 1a has a gap between the cover 3 and coupling member 6. When a rail cover is arranged, the lip part 11a deforms to fill the gap.

Description

  The present invention relates to a side seal that has a seal member, a holding plate, and a cover that are separately formed and is used by being fixed to an end portion in a moving direction of a slider that constitutes 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 been proposed that the side seal is composed of a separately formed seal member, a holding plate for holding the seal member, and a cover (scraper).

  In Patent Document 1, a side seal holding plate (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 plate. It is described that a scraper portion is provided to be opposed to the outer surface with a gap. The holding plate and the seal part are engaged with each other by a concave-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 sealing member, a holding plate, and a cover, the sealing plate is sealed to the holding plate for the purpose of preventing the sealing member from being deteriorated in dust resistance and wear resistance and from falling off the holding plate. It describes that a member alignment portion is provided and a gap is provided between the concave portion of the holding plate and the seal member.

Japanese Patent Laid-Open No. 2007-211900 Japanese Patent No. 5316700

  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. Therefore, in either case, it is necessary to use different side seals in order to make the fastening margin of the lip portion with respect to the upper surface of the guide rail the same.

That is, in the case of a side seal in which the base portion of the seal member is fixed to the holding plate, it is necessary to prepare two side seals. In the case of a side seal composed of a seal member formed separately, a holding plate for holding the seal member, and a cover (scraper), two types of seal members need to be prepared.
An object of the present invention is to provide a case where a rail cover is arranged on the upper surface of a guide rail and a rail cover as a side seal of a linear guide device including a seal member, a holding plate, and a cover (scraper) formed separately. It is to provide a device that can be used without replacement of the seal member when it is not arranged.

In order to solve the above-mentioned subject, the side seal of the linear guide device of one mode of this invention has the following composition (1)-(6).
(1) It has a seal member, a connecting member, a holding plate, and a cover that are separately formed. It is used by being fixed to the slider moving direction end of the slider constituting the linear motion guide device.
The holding plate is disposed closer to the slider than the cover, and the seal member is disposed between the holding plate and the cover in a state of being engaged with the connecting member.
(2) 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 that constitutes 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 portion and the side seal portion have a base portion that fits with the connecting member.

(3) The connecting member has a recess that fits with the base of the upper seal part and the side seal part. The holding plate includes an upper plate portion and both side plate portions facing 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.
(4) The said base part of the said upper side seal part and the said side seal part has a convex part for fitting to the recessed part of the said connection member in the thickness direction.

(5) The holding plate and the cover sandwich the upper seal portion and the connecting member in at least a fitting portion between the convex portion of the upper seal portion and the concave portion of the connecting member in the fitting direction. A gap is provided between the lip part of the upper seal part and the cover, and a gap is provided between the lip part and the connecting member.

  The side seal of this aspect uses only one seal member and holds the seal member so as to be elastically deformable, thereby absorbing a change in position in the slider moving direction, and in the vertical direction of the lip portion. It can be used by changing the position.

  The side seal of the present invention is a side seal of a linear motion guide device comprising a seal member, a connecting member, a holding plate, and a cover (scraper) formed separately, and a rail cover is disposed on the upper surface of the guide rail. It can be used without exchanging the seal member between the case where it is present and the case where the rail cover is not disposed.

It is a perspective view which shows the seal member, holding plate, and cover which are the side seal component parts of embodiment. It is a rear view which shows the sealing member of embodiment. It is a front view which shows the connection member of embodiment. It is sectional drawing (equivalent to AA sectional drawing of FIG. 2) which shows the sealing member and connection member of embodiment. It is a front view which shows the holding plate of embodiment. It is BB sectional drawing of FIG. It is sectional drawing which shows the upper part of the guide rail of the state which attached the side seal of embodiment to the linear guide apparatus, Comprising: (a) is a case where a rail cover is not arrange | positioned, (b) is a rail cover arrange | positioned The case where it is done is shown. It is a partially broken perspective view which shows the prior art example of a linear guide apparatus.

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.
The side seal 4 of this embodiment can be used in place of the side seal 203 of the linear motion guide device shown in FIG. 8, and has the shape shown in FIG. 1, the sealing member 1, the holding plate 2, and the cover 3 Consists of. The holding plate 2 is disposed closer to the slider than the cover 3.

As shown in FIG. 2, the seal member 1 is disposed on the left and right sides of the guide rail 100 and the upper seal portion 1 a disposed on the upper side of the guide rail 100 (FIG. 8) as viewed from the back. 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 held by the holding plate 2. 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 connecting member 6 has a concave portion 61 and a convex portion 62 for engaging with the base portion 12 of the seal member 1 in an arrangement viewed from the front.

As shown in FIG. 4, the base portion 12 of the seal member 1 has a convex portion (connecting member engaging portion) 121 and a concave portion 122 on the first surface 13 which is one surface in the thickness direction (the surface on the anti-slider side). Is formed.
The concave portion 122 includes a bottom portion 122a, a convex portion 121 side wall surface 122b, and a wall surface 122c on the lip portion 11 side.
The distal end portion 123 of the base portion 12 protrudes from the base portion 12 convex portion 121 to the side opposite to the slider. The second surface 14, which is the other surface in the thickness direction (the surface on the slider side), is the same for the base portion 12 and the tip portion 124.
A corner portion 123a protruding from the base end portion 122 of the distal end portion 123 toward the slider is also a holding plate engaging portion. The second surface 14, which is the other surface in the thickness direction of the base portion 12 (the surface opposite to the slider), is the same in the base end portion 122 and the tip end portion 123. The tip portion 123 is formed with the lip portion 11 inclined from the second surface 14 side to the first surface 13 side.

  The connecting member 6 includes a first convex portion 60, a concave portion 61 that engages with the convex portion 121 of the seal member 1, and a second convex portion 62 that engages with the concave portion 122 of the seal member 1. FIG. 4B shows a state where the seal member 1 and the connecting member 6 are engaged. The convex portion 121 of the sealing member 1 is engaged with the concave portion 61 of the connecting member 6 without a gap, and the concave portion 122 of the sealing member 1 and the second convex portion 62 of the connecting member are connected to the bottom portion 122 a of the sealing member 1. The lip portion 11 side wall 122c is engaged with a gap.

  As shown in FIGS. 1 and 5, the holding plate 2 has substantially the same surface shape as the end cap 202 (FIG. 8) constituting the slider 200 (FIG. 8), and is disposed on the upper side of the guide rail 100. It consists of a plate portion 2 a and side plate portions 2 b arranged on the left and right sides of the guide rail 100. A through hole 52 through which the bolt 500 (FIG. 8) is passed and a through hole 42 to which the grease nipple 400 (FIG. 8) is attached are formed in the upper plate portion 2a. A through hole 52 through which the bolt 500 passes is formed in the side plate portion 2b. Inside the holding plate 2 (guide rail side), a seal holding portion 20 that holds the base portion 12 of the seal member 1 is formed.

  As shown in FIG. 6, the seal holding unit 20 includes a first holding surface 21, a second holding surface 22, a third holding surface 23, and a fourth holding surface 24 in the upper plate portion 2 a of the holding plate 2. And the fifth holding surface 25. The first holding surface 21 is a surface with which the third surface 63 that is the outermost surface (side away from the guide rail) of the connecting member 6 can come into contact. The second holding surface 22 is a surface with which the first surface 60 of the connecting member 6 can come into contact.

  The third holding surface 23 and the fourth holding surface 24 are surfaces that can contact the proximal end portion 12 of the seal member 1. The fifth holding surface 25 is a surface facing the second surface 14 of the seal member 1 with a gap.

  The second holding surface 22, the fourth holding surface 24, and the fifth holding surface 25 are parallel to the plate surface of the holding plate 2. The second holding surface 22, the fourth holding surface 24, and the fifth holding surface 25 are arranged in this order from the opposite side of the slider toward the slider. The first holding surface 21 and the third holding surface 23 are orthogonal to the plate surface of the holding plate 2 and are arranged in this order from the opposite side of the guide rail toward the guide rail side.

  As shown in FIG. 1, the cover 3 has substantially the same surface shape as the end cap 202 (FIG. 8) that constitutes the slider 200 (FIG. 8), and is spaced from the upper surface of the guide rail 100 (FIG. 8). It consists of the upper part 31 which opposes, and the upper part 32 which opposes the left-and-right side surfaces of the guide rail 100 (FIG. 8) with a gap. A through hole 53 through which the bolt 500 (FIG. 8) passes and a through hole 43 to which the grease nipple 400 (FIG. 8) is attached are formed in the upper portion 31. The side portion 32 is formed with a through hole 53 through which the bolt 500 (FIG. 8) is passed. When the cover 3 holds the sealing member 1 and the connecting member 6 between the holding plate 2 and the holding plate 2, the cover 3 comes into contact with the connecting member 6 by engaging the surfaces.

  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 holding plate 2 is made of a synthetic resin such as POM (polyoxymethylene). The cover 3 is made of metal such as SUS304.

The side seal 4 of this embodiment is used as shown in FIG.
When the linear motion guide device is used without arranging the rail cover 5 on the upper surface 101 of the guide rail 100, as shown in FIG. 7A, the convex portion 121 of the sealing member 1 is the concave portion 61 of the connecting member 6. The concave portion 122 of the seal member 1 and the second convex portion 62 of the connecting member have a gap between the bottom portion 122a of the seal member 1 and the wall surface 122c on the lip portion 11 side. The side seal 4 is assembled in the engaged state. Then, the side seal 4 is fixed to the slider 220 with a bolt inserted through the through hole 53 of the cover 3 and the through hole 52 of the holding plate 2. Accordingly, the lip portion 11a of the upper seal portion 1a contacts the upper surface 101 of the guide rail 100, and the lip portion 11b of the side seal portion 1b contacts the side surface 102 and the rolling surface 110 of the guide rail 100.

  In this state, in the cross section showing the upper portion of the guide rail, as shown in FIG. 7A, the bottom surface 122a of the concave portion 122 of the seal member 1 and the side wall surface 122c of the front end portion 123 are between the connecting member. , Each has a gap. There is also a gap between the fifth holding surface 25 and the second surface 14 of the seal member 1.

When the rail cover 5 is arranged on the upper surface 101 of the guide rail 100 and the linear guide device is used, the lip portion 11 of the seal member 1 rides on the rail cover 5 as shown in FIG. The tip portion 123 is lifted upward in the drawing, and the side wall surface of the tip portion 123 of the seal member 1 and the connecting member 6 come into contact with each other. On the other hand, the section of the bottom surface 122a of the seal member is compressed in the vertical direction in the figure, the gap between the bottom surface 122a of the recess 122 of the seal member 1 and the connecting member, the fifth holding surface 25, and the second of the seal member 1 It elastically deforms so as to fill the gap between the surface 14.
Thus, the front end portion 123 including the lip portion 11 of the seal member 1 can follow the change in position due to the presence or absence of the rail cover 5.

  As described above, the side seal 4 of this embodiment uses only one seal member 1 and is assembled by changing the position of the seal member 1 in the slider moving direction. Can be used by changing. For this reason, the seal member 1 can be used without being replaced when the rail cover 5 is disposed on the upper surface 101 of the guide rail 100 and when the rail cover 5 is not disposed.

DESCRIPTION OF SYMBOLS 1 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 The 1st convex part (connection member engagement) Part)
122 Concave portion of the seal member (connecting member engaging portion)
122a Bottom of the recess 122b Wall surface on the proximal end side of the recess 122c Wall surface on the distal end side of the recess 123 Front end portion of the seal member 124 Second convex portion of the seal member 13 First surface of the seal member (one surface in the thickness direction)
13a 1st surface of the front-end | tip part of a sealing member 14 2nd surface (other surface of thickness direction, engaging part with a holding plate)
DESCRIPTION OF SYMBOLS 15 3rd surface of a sealing member 2 Holding plate 2a Upper part 2b of holding plate Side part of holding plate 20 Seal holding part 21 First holding surface 22 Second holding surface 23 Third holding surface 24 Fourth holding surface 25 Fifth Holding surface 3 Cover 31 Upper part of the cover 32 Side part of the cover 4 Side seal 5 Rail cover 42 Through hole for attaching the grease nipple 43 Through hole for attaching the grease nipple 52 Through hole for passing the bolt 53 Through hole for passing the bolt 6 Connecting member 60 First convex part of connecting member 60a First convex part tip surface of connecting member 61 Concave part of connecting member 62 Second concave part of connecting member 100 Guide rail 101 Upper surface of guide rail 110 Rolling surface of guide rail 200 Slider 201 Slider body 202 End Cap 203 Side Seal 205 Female Thread 210 Slider Rolling Surface 221 Return Passage 222 Direction change path 300 Roller (rolling element)
400 Grease nipple 500 bolt

Claims (1)

It has a seal member, a connecting member, a holding plate, and a cover that are separately formed, and is used by being fixed to the slider moving direction end of the slider constituting the linear motion guide device,
The holding plate is disposed closer to the slider than the cover, and the seal member is disposed between the holding plate and the cover in a state of being engaged with a connecting member,
The seal member includes an upper seal portion having a lip portion that comes into contact with an upper surface of a guide rail that constitutes 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 that fits with the connecting member,
The connecting member has a recess that fits with the base part of the upper seal part and the side seal part,
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 base part of the upper seal part and the side seal part has a convex part for fitting in the thickness direction into the concave part of the connecting member,
The holding plate and the cover sandwich the upper seal portion and the connecting member in at least a fitting position between the convex portion of the upper seal portion and the concave portion of the connecting member in the fitting direction. A side seal for a linear motion guide device having a gap between the lip portion of the seal portion and the cover, and holding the gap between the lip portion and the connecting member. .

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