JP2014163482A - Linear guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear guide device in which recovery of deteriorated sealability is easy.SOLUTION: In a linear guide device, when a gap with a guide rail 1 is generated by abrasion and damage of a seal 16 of a laminate 15, the seal 16 positioned next to an outermost side can bury the gap formed between the guide rail 1 and the seal 16 by peeling the seal 16 positioned at the outermost side, to thereby keep sealability. Consequently, without exchanging a seal device, deteriorated sealability can be easily recovered.

Description

  The present invention relates to a linear guide device provided with a seal device.

Conventionally, a linear guide device used in a machine tool or the like includes a guide rail having a rolling element rolling groove extending in the longitudinal direction on the outer surface, and a rolling element formed to face the rolling element rolling groove of the guide rail. A slider having a rolling groove and straddling the guide rail so as to be relatively movable, and a seal device mounted at both ends of the slider in the longitudinal direction are provided.
The slider includes a slider body and end caps joined to both end faces of the slider body in the relative movement direction (longitudinal direction). A seal device is attached to a surface of the end cap opposite to the slider body. Yes. When foreign matters such as dust, dust, chips and chips enter the gap formed between the guide rail and the slider and adhere to the rolling element rolling groove, smooth rolling of the rolling element is hindered. For this reason, this sealing device contacts the surface of the guide rail and seals the opening of the gap portion in order to prevent foreign matter from entering the gap portion. Thereby, the favorable operability of the linear guide device is maintained.

These seal devices generally use a seal that is a rubber composition. Conventionally, a rubber composition generally has a high frictional resistance in contact with other members, and has a durability against friction caused by sliding. poor. For this reason, the seal lip portion, which is a contact portion with the guide rail, is likely to be worn or chipped, thereby creating a gap between the guide rail and the seal, which may impair the sealing performance. In view of this, a technique has been proposed that facilitates replacement of a sealing device in which the lip portion of the seal is worn or missing, and recovers the reduced sealing performance.
For example, in the linear guide device described in Patent Document 1, when wear or loss occurs, the seal device can be removed with the slider straddled on the guide rail, so that the seal device can be easily replaced. . Patent Document 1 describes that a plurality of seals can be stacked.

JP-A-9-42284

However, in general, the linear guide device is often disposed at a position where it is difficult to reach within the device in which the linear guide device is used, so that it is actually difficult to remove the seal device. Similarly, when a new sealing device is attached, the operation becomes difficult.
Furthermore, even if the seals are laminated, the wear of those lip portions proceeds simultaneously if they are merely laminated. For this reason, if the outer seal is worn or missing, the inner seal may also be worn or missing as well, so all the stacked seals must be replaced at the same time. There is a risk that it must not.
The present invention has been made to solve such problems, and an object of the present invention is to provide a linear guide device that can easily recover a deteriorated sealing performance.

  In order to solve the above problems, a linear guide device according to an aspect of the present invention is directed to a guide rail having a rolling element rolling groove extending in a longitudinal direction on an outer surface, and the rolling element rolling groove of the guide rail. The slider having a formed rolling element rolling groove and spanning the guide rail so as to be relatively movable, and the slider formed to seal a gap formed between the guide rail and the slider A contact-type sealing device mounted at least before and after in the longitudinal direction, wherein the contact-type sealing device includes a plurality of seals having the same height and having a lip portion at a portion in contact with the guide rail. And the seals are detachably stacked one by one in the order of the seal in the direction approaching the slider from the seal at the end far from the slider, and the slider Each lip portion is formed at a position away from the surface of the guide rail in order of the seal on the side farther from the seal on the side farther from the end of the guide rail, and the plurality of seals are directed toward the surface of the guide rail. And pressed by the pressing member.

  Further, in the linear guide device, a seal case is attached to the end cap, and a plurality of stacked seals are supported on the seal case so as to be movable toward the guide rail surface. The seal closest to the slider may be pressed and urged toward the guide rail by the pressing member in the seal case.

Furthermore, in the linear guide device, the seal has a convex portion that is pulled to remove the seal from another seal and remove it from the guide rail, in any direction intersecting the longitudinal direction of the guide rail. It can also be formed.
Further, in the linear guide device, the seal has a U-shape provided with an opening for straddling the guide rail, and is similarly elastic to a substantially U-shaped core member. The core member may be provided with a weak portion at an intermediate portion so that the opening portion of the seal is opened by pulling the convex portion.
Furthermore, the plurality of seals to be stacked may be set to the same height.
Furthermore, since the laminated seals are pressed and biased, at least one of the lip portions of the laminated seals can contact the surface of the guide rail.

  Since the seal device provided in the linear guide device of the present invention has a plurality of seals stacked and is detachably stacked one by one, even if the lip portion of the seal device is worn or broken, By removing the seal at the end on the side far from the slider, it can be changed to a new seal. In addition, each lip portion of the plurality of stacked seals is formed at a position away from the surface of the guide rail in order of the seal on the end farther from the slider and the seal on the side closer to the slider. The seal is urged toward the guide rail. For this reason, since the seal that is far from the slider is first worn or damaged, the new seal stacked next to the peeled seal comes into contact with the guide rail only after the seal is peeled off. It will be. For this reason, a plurality of stacked seals do not contact with the guide rail at the same time, and wear or chipping does not occur. Therefore, the linear guide device of the present invention can easily recover the lowered sealing performance.

It is a perspective view showing the linear guide device concerning a 1st embodiment of the present invention. It is sectional drawing which follows the AA line of FIG. FIG. 3A is a cross-sectional view taken along line BB in FIG. FIG. 3b is a view at the same position as FIG. 3a showing a modification of the first embodiment. FIG. 4a is a view at the same position as FIG. 3a showing a state where the outer seal of the first embodiment is worn. FIG. 4b is a view at the same position as FIG. 3b showing a state where the outer seal of the modified example of the first embodiment is worn. FIG. 5a is a view at the same position as FIG. 3a showing a state where the worn outer seal of the first embodiment is peeled off. FIG. 5b is a view at the same position as FIG. 3b showing a state where the worn outer seal of the modified example of the first embodiment is peeled off. FIG. 6A is a diagram illustrating a state where the seal illustrated in FIG. 5A is peeled off. FIG. 6B is a diagram illustrating a state where the seal illustrated in FIG. 5B is peeled off. It is sectional drawing which follows the CC line of FIG. It is a figure of the same position as FIG. 6 which shows the state of FIG. It is a figure of the same position as FIG. 6 which shows the state of FIG. It is sectional drawing similar to FIG. 6 of the linear guide apparatus which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the seal | sticker used for the linear guide apparatus which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the seal | sticker used for the linear guide apparatus which concerns on the 3rd Embodiment of this invention.

An embodiment of a linear guide device according to the present invention will be described in detail with reference to the drawings. [First Embodiment]
A first embodiment of the present invention will be described below.
FIG. 1 is a perspective view showing a first embodiment of a linear guide device according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. The broken line in FIG. 2 shows the bolt hole. In the following drawings, the same or corresponding parts are denoted by the same reference numerals.

  A slider 2 having a substantially U-shaped cross section is straddled on a guide rail 1 having a substantially rectangular cross section extending in the longitudinal direction so as to be movable relative to the longitudinal direction. In addition, these cross sections are the cross sections cut | disconnected by the plane orthogonal to a longitudinal direction. Since the slider 2 has sleeve portions 6 and 6 extending in the same direction from both sides of the back portion 7 and the back portion 7 and the sleeve portions 6 and 6 are perpendicular to each other, the cross-sectional shape of the slider 2 is substantially U-shaped. I am doing. The slider 2 includes a slider body 2A and end caps 2B and 2B that are detachably attached to both ends in the longitudinal direction.

  In the present invention, the surface of the guide rail 1 facing the back portion 7 of the slider 2 is the upper surface 1 b, the surface facing the sleeve portion 6 is the side surface 1 a of the guide rail 1, and the remaining four surfaces around the guide rail 1 are the remaining surfaces. One surface is the bottom surface. Moreover, in this invention, when a linear guide apparatus is seen from a longitudinal direction edge part side, let both sides centering on the central axis of the guide rail 1 be left and right. Therefore, the slider 2 having a substantially U-shaped cross section is constructed so as to straddle from the upper surface of the guide rail 1 to the left and right side surfaces. Of course, the directions of the guide rail 1 and the slider 2 change depending on the application.

  A total of four rolling element rolling grooves 10 extending in the longitudinal direction are formed in the guide rail 1. Further, on the inner side surfaces 6 a and 6 a of the left and right sleeve portions 6 and 6 of the slider body 2 </ b> A, rolling element rolling grooves 11 facing the respective rolling element rolling grooves 10 of the guide rail 1 are formed. A rolling element rolling path 13 is formed by the rolling element rolling groove 10 of the guide rail 1 and the rolling element rolling groove 11 of the slider 2. The number of rolling element rolling grooves 10 and 11 provided in the guide rail 1 and the slider 2 is not limited to two rows on one side as shown in FIG. 2, but may be one row on one side or three rows or more, for example. Further, the cross-sectional shape of the rolling element rolling grooves 10 and 11 may be an arc shape or a gothic arc shape.

A large number of rolling elements 3 are slidably loaded in the rolling element rolling path 13, and the slider 2 moves relative to the guide rail 1 in the longitudinal direction through the rolling of these rolling elements 3. It is supposed to move. In addition, the kind of rolling element is not limited to a ball | bowl, A roller can also be used as a rolling element. Further, a spacer may be interposed between the rolling elements 3.
Further, the slider 2 penetrates in the longitudinal direction in parallel with the rolling element rolling path 13 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 and the rolling element rolling path 13. And a straight path 14 formed of a through hole having a substantially circular cross section.

On the other hand, the end caps 2B, 2B are made of, for example, an injection-molded product of a resin material, and the cross-sectional shape is formed in a substantially U shape in accordance with the slider body 2A. Also, end cap 2B,
On both the left and right sides of the back surface of 2B (the contact surface with the slider body 2A), a semi-doughnut-shaped curved path (not shown) having a substantially circular cross section is formed in two upper and lower stages. When the end caps 2B and 2B are attached to the slider body 2A, the rolling element rolling path 13 and the linear path 14 are communicated with each other through a curved path. The linear path 14 and the curved paths at both ends constitute a rolling element return path for sending the rolling element 3 from the end point of the rolling element rolling path 13 to the starting point. The rolling element rolling path 13 and the rolling element return path Thus, a substantially annular rolling element circulation path is formed on both the left and right sides with the guide rail 1 interposed therebetween.
Sealing devices 5 are provided at both longitudinal ends of the slider 2. This sealing device 5 supports a laminated body 15 in which a plurality of seals 16 are detachably laminated, and supports the laminated body 15, and is attached to both ends in the longitudinal direction of the slider 2 (outer end face of each end cap 2B). A sealing case 18 is provided.

  As shown in FIGS. 7 to 9, the seal 16 constituting the laminated body 15 is substantially U-shaped like the slider 2, and the inner side of the substantially U-shaped is the surface of the guide rail 1. It has a shape along the cross-sectional shape. Specifically, the seal 16 has a groove 10 at a position corresponding to the rolling element rolling grooves 10 and 10 formed at corners where the upper surface 1b of the guide rail 1 and the left and right side surfaces 1a and 1a intersect. Protrusions 19, 19 having a shape corresponding to are formed. In addition, the protrusion 19 having a substantially semicircular cross section is also formed at a position corresponding to the rolling element rolling grooves 10 and 10 formed at the intermediate position in the vertical direction of the end facing the left and right side surfaces 1a and 1a of the guide rail 1. , 19 are formed. Further, the laminated body 15 in which the seals 16 are laminated also has a substantially U-shape as in the case of the seals 16, and has a shape along the cross-sectional shape of the surface of the guide rail 1.

  The laminated body 15 is formed by laminating a seal 16 having a lip portion 17 in contact with the surface (the upper surface 1b and both side surfaces 1a, 1a) of the guide rail 1 in a multistage manner along the longitudinal direction of the guide rail 1. Yes. The seals 16 are stacked so as to be removable one by one in the order of the seal in the direction approaching the end surface of the slider 2 from the seal at the end far from the end surface of the slider 2. 3A and 3B, the lip portions 17 of the seals 16 are guided by the seals 16 from the side farther from the end face of the slider 2 (outer side) to the end face side of the slider 2 (inner side). The rails 1 are stacked so as to be away from the surface (upper surface 1b and both side surfaces 1a, 1a).

Further, among the stacked seals 16, the opposing surfaces are engaged with each other as shown in FIG. That is, on the inner surface of the outer seal 16, the engagement convex portion 16 b is provided at the end portion close to the lip portion 17. If necessary, it may be provided in other parts and plural. Further, on the outer surface of the second seal 16 from the outside, an engaging recess 16d is provided at the end close to the lip 17 to engage the engaging protrusion 16b. The same applies to the second and third seals 16 from the outside. By fitting the engaging convex portions 16b and the engaging concave portions 16d, the seals 16 are detachably locked and stacked one by one. The seals 16 are only required to be detachably stacked, and are not limited to being locked by unevenness as illustrated. For example, the seal 16 may be detachably laminated by adhering it with an adhesive or the like.
Moreover, the modification of 1st Embodiment of the linear guide apparatus based on this invention is shown in FIG. 3b. Each seal 16 in this modification is the same as in the first embodiment. However, the engagement convex portion 16b is cut off from the seal 16 close to the end cap 2B.
Each of the seals 16 has the same height h. Of the stacked seals 16, the opposing ones are engaged with each other as shown in FIG. 3b. That is, on the inner surface of the outer seal 16, the engagement convex portion 16 b is provided at the end portion close to the lip portion 17.
The same applies to the second and third seals 16 from the outside. By fitting the engagement convex portions 16b and the engagement concave portions 16d, the seals 16 are detachably locked one by one, and are stacked while being shifted in the vertical direction.

Accordingly, the lip portions 17 of the seals 16 are sequentially separated from the guide rail 1 in the same manner, and the outer peripheral portions of the seals 16 on the side far from the lip portions 17 are similarly shifted in the vertical direction and are positioned outside. For this reason, the holding portion 18c that holds the seal 16 is also formed so that the inner side with which the seal 16 contacts is shifted in height.
Note that the engagement convex portion 16b is also formed on the seal 16 close to the end cap 2B, and a concave portion similar to the engagement concave portion 16d of the seal 16 is formed on the plate-like fixing portion 18a of the seal case 18. The engaging protrusion 16b may be engaged with this. In this case, the thickness of the plate-shaped fixing portion 18a is set to a dimension that allows the concave portion to be formed.

Further, as shown in FIGS. 3a, 3b, 4a, 4b, 5a, and 5b, the engaging convex portion 16b and the engaging concave portion 16d have an undercut shape, and the engaging convex portion 16b The lower end of the tip of the engaging recess 16d extends downward and the downward surface forms an inclined surface 16ba, and the lower portion of the engaging recess 16d extends downward and the upward surface forms an inclined surface 16da. Note that the upward surface of the engaging convex portion 16b and the downward surface of the engaging concave portion 16d are both horizontal.
The seal 16 is a rubber-like elastic body, and the material thereof is not particularly limited, and examples thereof include nitrile rubber, acrylic rubber, silicone rubber, fluorine rubber and other synthetic rubbers, thermoplastic elastomers, resins, and the like. . Further, the seal 16 may be composed only of rubber, resin, or the like, but may include a core material made of metal or the like.

As shown in FIGS. 6a and 6b, an engagement recess 16d is also formed in the seal 16 on the farthest side (outside) from the end cap 2B. For this reason, when the lip portion 17 of the outer seal 16 is worn or damaged due to use, the seal 16 can be removed using the jig 24.
That is, the tip of the jig 24 is formed in the same shape as the engagement convex portion 16 b of the seal 16, and this is engaged with the engagement concave portion 16 d of the seal 16 to be removed, and the seal 16 is peeled off from the next seal 16. Is. In this way, the jig 24 is held in a human hand or the jig 24 is supported by a tool so that the jig 24 is engaged with the seal 16 to peel off the seal 16 and newly sealed with the next seal 16. Can do.

If the seal 16 can be peeled in this way, it is not necessary to pinch and pull the convex portion 20 of the second embodiment, so that the convex portion 20 can be omitted. Even when the jig 24 is used as in the fourth embodiment, the convex portion 20 of the second embodiment is provided and both can be selectively used together.
Each of the embodiments described above shows examples of the present invention, and the present invention is not limited to these embodiments. For example, the number of the seals 16 constituting the laminated body 15 is three, but may be four or more, or may be two. Further, a sponge or the like may be used as the pressing member 18d.

  The seal case 18 is fixed to the surface of the end cap 2B, and the laminated body 15 can be moved by pressing and urging the laminated body 15 toward the surface of the guide rail 1 (upper surface 1b and both side surfaces 1a, 1a). I support it. As shown in FIGS. 3a to 5a, the seal case 18 has a fixed back portion 18a fixed to the surfaces of the end caps 2B and 2B (the surface opposite to the contact surface of the slider body 2A), and an opening on the guide rail 1 side. And the cross-sectional U-shaped part 18b which embraces the laminated body 15 from the outer side is provided. The U-shaped portion 18b of the seal case 18 holds the holding portion 18c that holds the laminated body 15 from the outside so as to be able to advance and retreat toward the guide rail 1, and guides the laminated body 15 through the holding portion 18c. A pressing member 18d that presses and urges toward the surface (upper surface 1b and both side surfaces 1a, 1a) of the rail 1 is provided. Here, a compression coil spring is used for the pressing member 18d.

  The fixed back portion 18a is fixed to the surface of the end cap 2B by conventional means. The U-shaped portion 18b is formed on the surface of the fixed back portion 18a opposite to the surface in contact with the end cap 2B along the shape of the left and right sides and the upper edge. Moreover, the holding part 18c is arrange | positioned so that the outer surface shape of the laminated body 15 may be followed, and is supporting the laminated body 15 by adhesion | attachment and other means. The holding portion 18c is disposed inside the U-shaped portion 18b formed along the shape of the left and right sides and the upper edge in a state where the stacked body 15 is supported.

  The pressing member 18d is held in an opening portion of the U-shaped portion 18b facing the guide rail 1, and presses and urges the laminated body 15 toward the surface of the guide rail 1 through the holding portion 18c. Yes. As the pressing member 18d, a coil spring is used in the present embodiment, but is not particularly limited as long as it can be pressed, and examples thereof include a rubber-like elastic body and a leaf spring-like elastic body.

  It is desirable that the pressing member 18d can press the entire laminated body 15 uniformly. Specifically, for example, when a coil spring is used as the pressing member, as shown in FIGS. 6 to 8, one is provided near the middle part of the opening of the U-shaped part 18 b formed at the left and right edges. It is desirable that the number and arrangement be such that the entire laminate 15 can be uniformly pressed so that two are equally arranged in the openings of the U-shaped portions 18b formed on the upper edge.

  When the slider 2 attached to the guide rail 1 moves relative to the longitudinal direction along the guide rail 1, the rolling element 3 loaded in the rolling element rolling path 13 rolls in the rolling element rolling path 13. However, it moves 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 13, the rolling element 3 is scooped up from the rolling element rolling path 13 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 linear path 14, and reaches the curved path on the opposite side through the linear path 14. Here, the U-turn is performed again to return to the starting point of the rolling element rolling path 13, and the circulation in the rolling element circulation path is repeated infinitely. This movement of the rolling element 3 ensures the smoothness of the movement of the slider 2.

  At this time, the laminated body 15 of the sealing device 5 is pressed and urged by the pressing member 18 toward the surface of the guide rail 1 as shown in FIGS. 3 a, 3 b, and 7 and held in the seal case 18. . In the present embodiment, the description will be made assuming that the number of seals 16 constituting the laminated body 15 is three. Since the laminated body 15 is pressed and urged, the lip portion 17 of the seal 16 located on the outermost side contacts the surface (the upper surface 1b and both side surfaces 1a and 1a) of the guide rail 1, and the pressing member 18d The pressing force and the reaction force of the lip portion 17 are balanced. For this reason, the second and third seals 16 are in a floating state.

  When the slider 2 moves relative to the guide rail 1 in this state, the lip portion 17 is in sliding contact with the surface 1b and seals the inside and outside of the slider 2. At this time, since the seals 16 are laminated so that the lip portions 17 of the seals 16 move away from the surface of the guide rail 1 as they go from the outside to the inside, The lip portion of the seal 16 located at the third position does not contact the surface of the guide rail 1. Thus, since the seal 16 of the laminated body 15 seals the gap formed between the guide rail 1 and the slider 2 from the outside, the sealing performance is maintained.

  4a, 4b, and 8 show the lip portion 17 that has been worn and broken due to sliding contact with the surface of the guide rail 1. FIG. It is understood that a gap is generated between the guide rail 1 and the seal 16 positioned on the outermost side of the laminated body 15 due to wear, and the sealing performance is not maintained. The degree of occurrence of these wears and defects is not uniform at the position along the tip edge of the lip portion 17, and there are places with and without a gap. Therefore, although the laminated body 15 is pressed and urged toward the surface of the guide rail 1, the gap cannot be completely filled, and the sealing performance is deteriorated.

  5a, 5b, and 9 show the sealing device 5 in which the seal 16 located on the outermost side of the worn laminate 15 is peeled off. Since the laminated body 15 is pressed and urged toward the surface of the guide rail 1, the seal 16 positioned on the outermost side is peeled off, so that the second laminated seal 16 is pressed by the pressing member 18 d. Thus, the lip portion 17 of the seal 16 fills the gap with the surface of the guide rail 1 and comes into slidable contact. As described above, at this time, the lip portion 17 of the seal 16 located third from the outside of the laminated body 15 does not contact the surface of the guide rail 1. Even if the outermost seal 16 is worn or damaged in this way, the gap formed between the guide rail 1 and the seal 16 can be filled by peeling off the seal 16, so that the seal 16 is sealed. Sex is maintained.

  As described above, the linear guide device according to the present embodiment peels off the outermost seal 16 even when a gap with the guide rail 1 is generated due to wear or breakage of the seal 16 of the laminate 15. Since the gap formed between the guide rail 1 and the seal 16 can be newly filled with the seal 16 located second from the outside, the sealing performance is maintained. Therefore, the reduced sealing performance can be easily recovered without replacing the sealing device.

  Further, the stacking and peeling of the seal 16 will be described. First, when the seals 16 are pushed against the movement of the seals 16 in the longitudinal direction, the seals 16 are pressed against each other and the engagement protrusions are formed. The tip surface of the portion 16b and the bottom surface of the engaging recess 16d are pressed against each other. Further, when the seals 16 are pulled with each other, the inclined surface 16ba of the engaging convex portion 16b and the inclined surface 16da of the engaging concave portion 16d are pressed against each other, so that the two seals 16 are engaged with each other. When the seal 16 slides on the surface of the guide rail 1 and is maintained, even when an external force is generated horizontally in the longitudinal direction, the seal 16 is difficult to peel off.

  Furthermore, since the slopes 16ba and 16da of the engagement convex portion 16b and the engagement concave portion 16d of the seal 16 are inclined upward toward the outside in the longitudinal direction of the slider 2 as described above, the outer seal 16 is moved outward. If it is pulled diagonally upward, the engaging convex part 16b moves in the direction along the opposing slopes 16ba, 16da, so that the concave-convex engagement is relatively easy with a slight deformation of the convex part 16b and the concave part 16d. It can be removed, and the removal operation of the seal 16 shown in FIGS. 5a and 5b is facilitated.

[Second Embodiment]
FIG. 10 is a cross-sectional view of the linear guide device according to the second embodiment, corresponding to FIG. 7 of the first embodiment.
In the seal device 5 of the present embodiment, the removal convex portion 20 that is peeled from the other seal 16 and pulled to be detached from the guide rail 1 intersects the longitudinal direction of the guide rail 1. It is formed in either direction. By pinching and pulling the removal convex portion 20 with a tool, the engagement convex portion 16b and the engagement concave portion 16d of the seal 16 can be fitted, the locking is released, and the seal 16 is released from the other seals 16. Can be peeled off. In the present embodiment, a leaf spring is used as the pressing member 18d. Moreover, the convex part 20 of this embodiment respond | corresponds to the convex part of this invention.

  With such a configuration, the linear guide device according to the present embodiment peels off the seal 16 in which wear or damage has occurred even when the linear guide device is disposed at a position that is difficult to reach within the device in which the linear guide device is used. be able to. Thereby, compared with the linear guide device of the first embodiment, the reduced sealing performance can be recovered more easily. The structure and operation of other parts are the same as those in the first embodiment.

[Third Embodiment]
FIG. 11 is a view showing the seal 16 used in the linear guide device according to the third embodiment, and FIG. 12 shows the movement of the seal device 16 when the seal 16 in FIG. 11 is pulled in the arrow direction. It is shown.
The shape of the seal 16 of this embodiment is similar to that of the seal 16 of the second embodiment, but is provided with a protruding protrusion. Here, the core 16 is provided with a rubber elastic body 22 on the core 21. By covering, it is integrally formed as shown in the first and second embodiments. Further, the material of the core material 21 is not particularly limited, and examples thereof include metals.

  The core member 21 has a substantially U-shape that is a size in which the seal 16 is made slightly smaller by the amount of the covering, and a weakened portion 23 is provided at an intermediate portion in the left-right direction. The weak part 23 should just be made weak in the intensity | strength in the part which comprises the seal | sticker 16, for example, does not form the core material 21 in the middle part vicinity in the left-right direction of the seal | sticker 16, or the core material 21 The fragile portion 23 can be formed by reducing the cross-sectional area.

When the removal protrusion 20 is pulled in the arrow direction in FIG. 11, the seal 16 is loaded in the arrow direction as a whole. At this time, since the seal 16 is straddled over the guide rail 1 and the protrusion 19 is engaged with the rolling element rolling groove 11 of the guide rail 1, the right half of the seal 16 in FIG. Against the counterclockwise force. For this reason, since the strength in the vicinity of the intermediate portion where the fragile portion 23 is formed is weaker than the portion where the core material 21 is formed, the seal 16 opens so that the fragile portion 23 becomes the center of the recess. It will be bent into two by force, and the opening will open to the left and right.
With such a configuration, the linear guide device according to the present embodiment can recover the sealed property more easily than the linear guide devices according to the first and second embodiments. Other structures and operations are the same as those in the first and second embodiments.

DESCRIPTION OF SYMBOLS 1 Guide rail 2 Slider 5 Sealing device 10,11 Rolling body rolling groove 16 Seal 17 Lip part 18 Seal case 18d Pressing member 20 Removal convex part 21 Core material 22 Elastic body 23 Fragile part

Claims (5)

A guide rail having a rolling element rolling groove extending in the longitudinal direction on the outer surface, and a rolling element rolling groove formed to face the rolling element rolling groove of the guide rail, and can be moved relative to the guide rail. A slider that is suspended, and a contact-type seal device that is mounted on at least one of the front and rear in the longitudinal direction of the slider so as to seal a gap formed between the guide rail and the slider. In the linear guide device,
The contact-type sealing device includes a plurality of seals having the same height provided with a lip portion in contact with the guide rail and stacked with the height shifted along the longitudinal direction. In order of the seals in the direction of approaching the slider in order from the seal of the part, the sheets are detachably stacked one by one, and in the order of the seal on the side closer to the slider in order from the seal at the end far from the slider A linear guide device in which each lip portion is formed at a position away from the surface of the guide rail, and the plurality of seals are pressed and urged by a pressing member toward the surface of the guide rail.   A seal case is attached to at least one of the front and rear sides of the slider, and a plurality of stacked seals are supported on the seal case so as to be movable toward the surface of the guide rail, and at least a seal closest to the slider among the plurality of seals. 2. The linear guide device according to claim 1, wherein the linear guide device is pressed and urged toward the guide rail by the pressing member in the seal case.   The seal is characterized in that a convex portion for pulling the seal to be removed from the other seal and removed from the guide rail is formed in one of the directions intersecting the longitudinal direction of the guide rail. Item 3. The linear guide device according to Item 1 or 2.   The seal has a U shape with an opening for straddling the guide rail. Similarly, the seal is formed by covering a core material having a substantially U shape with an elastic body. 4. The linear guide device according to claim 3, wherein the material is provided with a weak portion at an intermediate portion so that an opening of the seal is opened by pulling the convex portion.   6. The linear guide device according to claim 1, wherein at least one of the lip portions of the stacked seals is in contact with a surface of the guide rail.

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