JP2012002276A - Damage prevention component of linear guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damage prevention component of a linear guide device preventing generation of damages to an inner seal, a side seal, and a rail cover, when assembling the linear guide device.SOLUTION: The damage prevention component 32 is used for preventing the generation of damages to the rail cover 8, a side seal 5, and the inner seal 9 when assembling the linear guide device by mounting the slider 2 from the axial directional end of the guide rail 1. The step 30 is alleviated by attaching a damage prevention component 32 so as to cover the step 30 because the step 30 is formed by the rail cover 8 and the upper face 1b or the side faces 1a of the guide rail 1 exposed from the rail cover 8. Preferably, the cross sectional shape of the parts covering the step 30 may have a smooth curbed shape in the damage prevention component 32 covering the step 30.

Description

  The present invention relates to a damage prevention component used to prevent damage to an inner seal, a side seal, and a rail cover when assembling a linear motion guide device.

An example of a conventional linear motion guide device will be described with reference to FIGS. FIG. 11 is a perspective view illustrating the configuration of a conventional linear motion guide device. FIG. 12 is a front view of the linear motion guide device of FIG. 11 viewed from the axial direction.
A slider 102 is assembled on a guide rail 101 having a substantially square cross section extending in the axial direction so as to be relatively movable in the axial direction. The cross-sectional shape of the slider 102 is substantially U-shaped, and the cross-sectional shape of the inner surface thereof is a shape along the cross-sectional shape of the outer surface of the guide rail 101. Two rolling element raceway surfaces 110, 110 extending in the axial direction are formed on both side surfaces 101a, 101a of the guide rail 101, respectively.

  The slider 102 includes a slider main body 102A and end caps 102B and 102B that are detachably attached to both ends of the slider in the axial direction. The inner surfaces of the left and right sleeve portions 106 and 106 of the slider main body 102A. Are formed with two rolling element raceway surfaces 111, 111, 111, 111 facing the rolling element raceway surfaces 110, 110, 110, 110 of the guide rail 101.

  Four rolling element rolling paths are formed by the rolling element raceway surfaces 110, 110, 110, 110 of the guide rail 101 and the rolling element raceway surfaces 111, 111, 111, 111 of the sleeve portions 106, 106. These rolling element rolling paths extend in the axial direction. Note that the number of rolling element raceway surfaces 110 and 111 included in the guide rail 101 and the slider 102 is not limited to two on one side, and may be one or three or more on one side, for example.

Further, a plurality of rolling elements 103 arranged in the axial direction are arranged in the rolling element rolling path so as to be freely rotatable, and the slider 102 guides through the rolling of these rolling elements 103. It moves smoothly along the rail 101 in the axial direction.
When such a linear motion guide device is used by being attached to an injection molding machine, a machine tool (for example, various grinding machines), a robot, etc., foreign matter such as dust, dust, etc. on the rolling element raceway surface 110 of the guide rail 101 and other exposed surfaces. As a result, the end cap 102B is usually provided with a dust seal side seal 105.

In other words, substantially plate-like side seals 105 and 105 are attached to both end portions in the axial direction of the slider 102 (the end surface in the axial direction of each end cap 102B), and an opening of a gap between the guide rail 101 and the slider 102 is formed. Of these, the portion opened to the end surface in the axial direction of the end cap 102B is sealed, and foreign matter from entering the gap and the lubricant flowing out from the gap are prevented.
Furthermore, the slider body 102A and the end cap 102B are provided with rolling elements in order to prevent foreign matters such as dust and dust that have entered the slider 102 beyond the side seal 105 from entering the rolling element raceway surfaces 110 and 111. An inner seal 109 is provided along the raceway surface 111.

  A mounting hole 107 is formed in the guide rail 101 so that the guide rail 101 can be fixed to an injection molding machine, a machine tool (for example, various grinding machines), a robot, or the like with a bolt. When foreign matter such as dust and dust accumulates in the mounting hole 107, foreign matter such as dust and dust adheres to the rolling element raceway surface 111 of the slider 102 when the slider 102 passes above the mounting hole 107. Since smooth movement may be hindered, the upper surface of the guide rail 101 is covered with, for example, a metal rail cover 108 and the upper opening of the mounting hole 107 is closed. Both end portions in the width direction of the rail cover 108 are bent downward along the both side surfaces 101a of the guide rail 101.

  When assembling the linear motion guide device by mounting the slider 102 on the guide rail 101, in order to prevent the rolling element 103 held in the slider 102 from falling off the rolling element raceway surface 111, The slider 102 is temporarily assembled on a resin temporary shaft (not shown) formed in substantially the same shape, and the temporary shaft is arranged coaxially and in a straight line with the guide rail 101, and the slider 102 on the temporary shaft is arranged. Is moved on the guide rail 101 in the axial direction.

  At this time, a step 130 is formed from the rail cover 108 and the upper surface or side surface 101 a of the guide rail 101 exposed from the rail cover 108. When the slider 102 is mounted, the step 130 and the side seal 105 and the inner seal 109 come into contact with each other, so that the rail cover 108, the side seal 105, and the inner seal 109 may be damaged. Further, if the rail cover 108 interferes with the side seal 105 and the inner seal 109 when the slider 102 is mounted, the slider 102 may not be moved smoothly.

  In order to solve such a problem, various techniques have been proposed. For example, Patent Document 1 discloses a technique in which a protruding portion that protrudes so as to be abutted against the end portion in the width direction of the rail cover is provided at the end portion in the axial direction of the temporary shaft. When the slider on the temporary shaft is transferred to the guide rail, the inner seal rides on the protrusion of the temporary shaft, so that the inner seal is prevented from interfering with the rail cover. As a result, damage to the rail cover and the inner seal is suppressed, and the slider can be smoothly moved to the guide rail.

  Patent Document 2 discloses a temporary shaft whose cross-sectional outer shape is not uniform in the longitudinal direction. With such a configuration, the slider on the temporary shaft can be smoothly moved to the guide rail. Further, the cross-sectional shape of the temporary shaft is substantially the same as the cross-sectional shape of the guide rail of the linear motion guide device, and the size of the cross-sectional external shape of at least one end of the temporary shaft is larger than the size of the cross-sectional external shape of the guide rail. It is large and the size of the cross-sectional outer shape of the central portion of the temporary shaft is supposed to be smaller than the size of the cross-sectional outer shape of the guide rail. Therefore, it is possible to move the slider from the temporary shaft to the guide rail without damaging the side seal.

JP 2008-57690 A JP 2008-82504 A

However, with the technique disclosed in Patent Document 1, it is difficult to prevent the side seal from being damaged. Moreover, since the thickness of the protrusion of the temporary shaft is often very thin, there is a problem that it is easily broken. Therefore, it is necessary to increase the strength of the protrusions by using steel as the material of the temporary shaft, but the material of the entire temporary shaft must be changed from resin to steel.
Further, although the technique disclosed in Patent Document 2 can prevent the inner seal from being damaged, it is difficult to prevent the side seal from being damaged because there is a step between the rail cover and the guide rail on the upper surface of the guide rail. It was.

In addition, since the protruding portion of the end face of the temporary shaft that interferes with the rail cover is integrated with the temporary shaft, it is difficult to tolerate an installation error such that the position of the rail cover is shifted in the axial direction of the guide rail. For this reason, when affected by an attachment error, a gap is generated between the rail cover and the projection of the temporary shaft, which may cause damage to the inner seal and raise the rail cover. Further, since a gap is generated between the temporary shaft and the guide rail, there is a possibility that the slider on the temporary shaft cannot be smoothly moved to the guide rail.
Therefore, the present invention solves the problems of the prior art as described above, and damage to the linear motion guide device that prevents damage to the inner seal, side seal, and rail cover when assembling the linear motion guide device. It is an object to provide a prevention part.

In order to solve the above problems, the present invention has the following configuration. That is, the damage preventing component of the linear motion guide device according to the present invention includes a substantially rectangular guide rail having a rolling element raceway surface extending in the axial direction, and a rolling element raceway surface facing the rolling element raceway surface of the guide rail. And a plurality of rolling elements mounted in a freely rolling manner in a rolling element rolling path formed between the rolling element raceway surfaces and a slider attached to the guide rail so as to be relatively movable in the axial direction. A rail cover that covers a part of the upper surface and the side surface of the guide rail, and a gap between the guide rail and the slider that is attached to the axial end portion of the slider and is in sliding contact with the outer surface of the guide rail. A side seal that seals the opening; and a sliding member that is formed along a raceway surface of the rolling element of the slider and that slides on the outer surface of the guide rail or the rail cover from the upper surface side of the guide rail. When the linear motion guide device comprising an inner seal that prevents foreign matter from entering the rolling element raceway surface is assembled by mounting the slider from the axial end of the guide rail, the rail cover, the side A damage prevention part used for preventing damage to the seal and the inner seal, the step formed by the rail cover and the upper surface or side surface of the guide rail exposed from the rail cover It is possible to cover the step so that the step is relaxed.
In such a damage prevention component of the linear motion guide device, when the step is covered, the cross-sectional shape of the portion of the damage prevention component that covers the step can be a smooth curved shape. Preferably it is.

  The damage preventing component of the linear motion guide device according to the present invention can prevent the inner seal, the side seal, and the rail cover from being damaged when the linear motion guide device is assembled.

It is a perspective view of the linear motion guide apparatus explaining one Embodiment of the damage prevention component of the linear motion guide apparatus which concerns on this invention. It is a front view of the linear motion guide apparatus of FIG. It is a partial expanded sectional view explaining the structure of an inner seal. It is a perspective view explaining the method of mounting | wearing a guide rail with the slider temporarily assembled | attached to the temporary shaft. It is a figure explaining the method to attach the damage prevention component of Example 1. FIG. It is a side view of the guide rail which shows the state by which the level | step difference was eased by the damage prevention components of Example 1. FIG. It is a top view of the guide rail which shows the state by which the level | step difference was eased by the damage prevention components of Example 1. FIG. It is a figure explaining the method to attach the damage prevention component of Example 2. FIG. It is a figure explaining the method to attach the damage prevention component of Example 3. FIG. It is a figure explaining the method to attach the damage prevention component of Example 4. FIG. It is a perspective view of the conventional linear motion guide apparatus. It is a front view of the linear motion guide apparatus of FIG.

An embodiment of a damage preventing component for a linear guide apparatus according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a linear motion guide device for explaining an embodiment of a damage preventing component of the linear motion guide device according to the present invention, and FIG. 2 is a view of the linear motion guide device of FIG. It is a front view. In the following drawings, the same or corresponding parts are denoted by the same reference numerals.
A slider 2 is mounted on a substantially square guide rail 1 extending in the axial direction so as to be relatively movable in the axial direction. The cross-sectional shape of the slider 2 is substantially U-shaped, and the cross-sectional shape of the inner surface thereof is a shape along the cross-sectional shape of the outer surface of the guide rail 1. Two rolling element raceway surfaces 10, 10 extending in the axial direction are formed on both side surfaces 1a, 1a of the guide rail 1, respectively.

The slider 2 is composed of a slider body 2A and end caps 2B and 2B that are detachably attached to both end portions in the axial direction. The inner surface of the left and right sleeve portions 6 and 6 of the slider body 2A. Are formed with two rolling element raceway surfaces 11, 11, 11, 11 facing the rolling element raceway surfaces 10, 10, 10, 10 of the guide rail 1.
The rolling element raceway surfaces 10, 10, 10, 10 of the guide rail 1 and the rolling element raceway surfaces 11, 11, 11, 11 of the sleeve portions 6, 6 form four rolling element rolling paths. These rolling element rolling paths extend in the axial direction. Note that the number of rolling element raceway surfaces 10 and 11 provided in the guide rail 1 and the slider 2 is not limited to two on one side, and may be one or three or more on one side, for example.

Further, the slider 2 is a straight path (through a through-hole that penetrates in the axial direction in parallel with the rolling element rolling path at the upper and lower portions of the thick portions of the left and right sleeve portions 6 and 6 of the slider body 2A. Not shown).
On the other hand, the end cap 2B is made of, for example, an injection molded product of a resin material, and has a substantially U-shaped cross section. The end caps 2B and 2B are semi-doughnut-shaped curved paths (not shown) that connect the rolling element rolling paths and straight paths parallel to the left and right sides of the contact surface (back surface) with the slider body 2A. have.

  Then, a rolling element return path that feeds and circulates the rolling element 3 from the end point of the rolling element rolling path to the starting point is constituted by the straight path and the curved paths at both ends. A substantially annular rolling element circulation path is formed. In this rolling element circulation path, a large number of rolling elements 3 made of, for example, steel rollers are slidably loaded, and the slider 2 follows the guide rail 1 through the rolling of these rolling elements 3. To move in the axial direction. In FIG. 2, the rolling element 3 is a roller, but a ball may be used.

  When the slider 2 assembled to the guide rail 1 is moved in the axial direction along the guide rail 1, the rolling element 3 loaded in the rolling element rolling path rolls in the rolling element rolling path. While moving in the same direction as the slider 2 with respect to the guide rail 1. When the rolling element 3 reaches the end point of the rolling element rolling path, the rolling element 3 is scooped up from the rolling element rolling path by the tongue provided in the end cap 2B and sent to the curved path. The rolling element 3 that has entered the curved path makes a U-turn and is introduced into the straight path, and reaches the opposite curved path through the straight path. Here, the U-turn is performed again to return to the starting point of the rolling element rolling path, and the circulation in the rolling element circulation path is repeated infinitely.

  A mounting hole 7 is formed in the guide rail 1 so that such a linear motion guide device can be fixed to an injection molding machine, a machine tool (for example, various grinding machines), a robot or the like with a bolt. If foreign matter such as dust or dust accumulates in the mounting hole 7, foreign matter such as dust or dust adheres to the rolling element raceway surface 11 of the slider 2 when the slider 2 passes above the mounting hole 7. Since smooth movement may be hindered, for example, a metal or resin rail cover 8 covers almost the entire upper surface 1b of the guide rail 1 and closes the upper opening of the mounting hole 7. Then, both end portions 8 a in the width direction of the rail cover 8 are bent downward along the both side surfaces 1 a of the guide rail 1.

  Further, when the linear motion guide device is attached to an injection molding machine, a machine tool (for example, various grinding machines), a robot, etc., foreign matter such as dust or dust is present on the rolling element raceway surface 10 and other exposed surfaces of the guide rail 1. A dust seal side seal 5 is attached to the end cap 2B because it may accumulate and hinder rolling of the rolling element 3. That is, substantially plate-like side seals 5 and 5 that are in sliding contact with the outer surfaces (upper surface 1b and both side surfaces 1a) of the guide rail 1 are attached to both end portions in the axial direction of the slider 2 (the axial end surfaces of the end caps 2B). Thus, of the opening of the gap between the guide rail 1 and the slider 2, the portion opened to the end surface in the axial direction of the end cap 2B is sealed, so that foreign matter enters the gap and the gap enters the outside. Lubricant spillage is prevented.

  Further, as shown in FIGS. 2 and 3, the slider body 2A and the end cap 2B are provided with inner seals 9 and 9 along the rolling element raceway surfaces 11 on both the left and right sides. That is, the inner seal 9 extending in the axial direction is attached to the inner surface of the slider body 2A and the end cap 2B so as to be along the rolling element raceway surface 11. The lip portion 9a of the inner seal 9 is in sliding contact with both widthwise end portions 8a of the rail cover 8 bent downward along the side surface 1a of the guide rail 1. The inner seal 9 prevents foreign matters such as dust and dust that have entered the slider 2 beyond the side seal 5 from entering the rolling element raceway surfaces 10 and 11 from the upper surface 1 b side of the guide rail 1.

  When such a linear motion guide device is assembled by mounting the slider 2 from the axial end of the guide rail 1, the rolling element 3 held in the slider 2 falls off the rolling element track surface 11. In order to prevent this, the slider 2 is temporarily assembled on a resin temporary shaft 20 formed in substantially the same shape as the guide rail 1, and the temporary shaft 20 is coaxial with the guide rail 1 as shown in FIG. In addition, the slider 2 on the temporary shaft 20 is moved in the axial direction so as to be transferred onto the guide rail 1 in a straight line. In FIG. 4, the illustration of the slider 2 on the temporary shaft 20 is omitted.

  At this time, a step 30 is formed from the rail cover 8 and the upper surface 1 b or the side surface 1 a of the guide rail 1 exposed from the rail cover 8. When the slider 2 is mounted, the step 30 (the end face of the step 30) and the side seal 5 and the inner seal 9 come into contact with each other, so that the rail cover 8, the side seal 5, and the inner seal 9 may be damaged. is there. Further, if the rail cover 8 interferes with the side seal 5 and the inner seal 9 when the slider 2 is mounted, the slider 2 may not be able to move smoothly.

  Therefore, in this embodiment, the damage prevention component 32 is used to prevent the rail cover 8, the side seal 5, and the inner seal 9 from being damaged. That is, the damage prevention component 32 is attached so as to cover the step 30, and the step 30 is relaxed. At this time, it is preferable that the damage prevention component 32 covering the step 30 has a smooth curved cross-sectional shape at the portion covering the step 30.

  If the damage prevention part 32 is attached and the step 30 is relaxed, the side seal 5 and the inner seal 9 move while contacting the surface of the damage prevention part 32 when the slider 2 is mounted. 8 and the side seal 5 and the inner seal 9 hardly interfere with each other (contact with the end face of the step 30). Therefore, the rail cover 8, the side seal 5, and the inner seal 9 are hardly damaged when the linear guide device is assembled. Further, since the slider 2 is mounted on the guide rail 1 while the side seal 5 and the inner seal 9 are gradually deformed toward the outer side of the guide rail 1, the slider 2 is mounted on the guide rail 1 smoothly. Is possible.

Since the damage prevention component 32 can be attached to the step 30 at an arbitrary position, even if there is an attachment error in the rail cover 8, the step 30 can be relaxed at an arbitrary position including the attachment error.
Hereinafter, the present invention will be described more specifically with reference to examples. The configuration of the linear motion guide device, the method of assembling the linear motion guide device, and the operation and effect of the damage prevention component 32 are almost the same as those described above, so only the different parts will be described. Omitted.

[Example 1]
For example, a metal rail cover 8 covers almost the entire upper surface 1 b of the guide rail 1, and the upper opening of the mounting hole 7 is closed. Then, both end portions 8 a in the width direction of the rail cover 8 are bent downward along the both side surfaces 1 a of the guide rail 1. Exposed from the rail cover 8 is only one axial end portion of the guide rail 1 on both the upper surface 1b and the side surface 1a.

  Since the rail cover 8 and the exposed surface of the guide rail 1 form a step 30 on the upper surface 1b and the side surface 1a of the guide rail 1, a damage prevention component 32 is attached to cover the step 30. The damage prevention component 32 is a film-like member having one adhesive surface, and is adhered to the guide rail 1 and the rail cover 8 by the adhesive surface. And the damage prevention component 32 is processed into the shape which can cover all the level | step differences 30 by bending.

  When the damage prevention component 32 is attached, as shown in FIGS. 5A to 5C, the step 30 is covered with the damage prevention component 32 and the portion protruding outward from the upper surface 1b of the guide rail 1 is removed. The guide rail 1 is bent downward along the axial end face and both side faces 1 a to cover the step 30 formed on the both side faces 1 a of the guide rail 1. Thereby, as shown in FIGS. 6 and 7, the step 30 is relaxed. And the cross-sectional shape of the part which covered the level | step difference 30 among the damage prevention components 32 has comprised the smooth curve shape, as shown to the enlarged view part of FIG.

[Example 2]
The damage prevention component 32 of the second embodiment is substantially the same as that of the first embodiment. However, by bending, only the step 30 formed on both side surfaces 1a of the guide rail 1 is formed. Is different. Therefore, since the step 30 formed on the upper surface 1b of the guide rail 1 is not relaxed, application to a linear guide device that does not include the side seal 5 is preferable.

  Thereby, the interference (contact with the end surface of the level | step difference 30) with the rail cover 8 and the inner seal 9 at the time of mounting | wearing of the slider 2 hardly arises. Therefore, the rail cover 8 and the inner seal 9 are hardly damaged when the linear motion guide device is assembled. In addition, since the area of the damage prevention component 32 is smaller than that in the case of the first embodiment, the labor and cost of attaching the damage prevention component 32 can be reduced. Contrary to the case of the second embodiment, the damage prevention component 32 has a shape that covers only the step 30 formed on the upper surface 1 b of the guide rail 1 and is formed on both side surfaces 1 a of the guide rail 1. When the step 30 is not relaxed, application to a linear motion guide device that does not include the inner seal 9 is preferable.

  When the damage prevention component 32 is attached, as shown in FIGS. 8A to 8C, the damage prevention component 32 is attached to the axial end surface of the guide rail 1 and protrudes outward from the axial end surface. The bent portion is bent in the axial direction along both side surfaces 1 a of the guide rail 1 to cover the step 30 formed on both side surfaces 1 a of the guide rail 1. Thereby, the level | step difference 30 formed in the both side surfaces 1a of the guide rail 1 is eased.

Example 3
The damage prevention component 32 of the third embodiment is substantially the same as that of the first embodiment, but covers all the steps 30 formed on the upper surface 1b and the side surface 1a of the guide rail 1 without being bent. It is the cover member shape | molded in the shape which can be performed. The material of the damage prevention component 32 is preferably resin, rubber, metal or the like.

Compared with the case of Examples 1 and 2, it is only an operation of attaching the damage prevention component 32, and the labor of attaching a film-like member so as to cover the step 30 can be saved. Moreover, since the damage prevention component 32 can be manufactured using a metal mold | die, mass production and manufacturing cost reduction are possible. Further, the damage prevention component 32 can be manufactured by bending a metal plate. Further, since the material can be selected from resin, rubber, metal, or the like, the damage prevention component 32 of an appropriate material can be selected according to the use environment of the linear motion guide device. For example, if the usage environment requires coolant resistance, a material satisfying the coolant resistance may be selected.
When attaching the damage prevention component 32, as shown in FIGS. 9A and 9B, the damage prevention component 32 is engaged with the axial end portion of the guide rail 1, and the upper surface 1b of the guide rail 1 is engaged. And the step 30 formed on both side surfaces 1a is covered. Thereby, the level | step difference 30 formed in the upper surface 1b and the both side surfaces 1a of the guide rail 1 is eased.

Example 4
The damage prevention part 32 of Example 4 is comprised with resin. Examples thereof include a resin solution, a liquid curable resin, and a viscous curable resin. After such resin is applied so as to cover all the steps 30 formed on the upper surface 1b and the side surface 1a of the guide rail 1, if the resin is solidified, a damage preventing part 32 that covers the steps 30 is formed. .
In the case of a resin solution, if the solvent is vaporized by a conventional method such as heating, the damage preventing part 32 made of resin is formed. In the case of a liquid curable resin or a viscous curable resin, if the curable resin is cured by a conventional method such as heating, radiation irradiation (for example, ultraviolet irradiation), aging, etc., the solid curing A damage preventing part 32 made of a conductive resin is formed. Compared to the case of the third embodiment, since the work is merely an application of a solution or a curable resin, a die or the like is not required, and the manufacturing cost of the damage prevention component 32 can be reduced.

  When the damage prevention component 32 is attached, as shown in FIGS. 10A and 10B, for example, a liquid thermosetting resin is formed on the upper surface 1 b and both side surfaces 1 a of the guide rail 1. It coat | covers so that the level | step difference 30 may be covered. And if the thermosetting resin is hardened by heat processing, the damage prevention component 32 which covers the level | step difference 30 will be formed. Thereby, the level | step difference 30 formed in the upper surface 1b and the both side surfaces 1a of the guide rail 1 is eased.

DESCRIPTION OF SYMBOLS 1 Guide rail 1a Side surface 1b Upper surface 2 Slider 2A Slider main body 2B End cap 3 Rolling body 5 Side seal 8 Rail cover 9 Inner seal 10 Rolling body raceway surface 11 Rolling body raceway surface 30 Step 32 Damage prevention part

Claims (2)

A guide rail having a substantially rectangular cross section having a rolling element raceway surface extending in the axial direction, a rolling element raceway surface facing the rolling element raceway surface of the guide rail, and attached to the guide rail so as to be relatively movable in the axial direction. A slider, a plurality of rolling elements movably loaded in a rolling element rolling path formed between the rolling element raceway surfaces, and a rail that covers a part of the upper surface and side surfaces of the guide rail A cover, a side seal attached to the axial end of the slider and in sliding contact with the outer surface of the guide rail to seal the opening of the gap between the guide rail and the slider; and a rolling element raceway surface of the slider An inner surface formed along the outer surface of the guide rail or in contact with the rail cover to prevent foreign matter from entering the rolling element raceway surface of the slider from the upper surface side of the guide rail. In order to prevent the rail cover, the side seal, and the inner seal from being damaged when assembling the linear motion guide device including the seal by mounting the slider from the axial end portion of the guide rail. Damage prevention parts used in
A linear guide characterized in that a step formed by the rail cover and an upper surface or a side surface of the guide rail exposed from the rail cover can be covered so that the step is relaxed. Damage prevention parts for equipment.   2. The linear motion according to claim 1, wherein when the step is covered, a cross-sectional shape of a portion of the damage prevention component that covers the step can be a smooth curved shape. Damage prevention parts for guide devices.

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