WO2017199579A1 - Attachment structure for sliding scraper, and linear guide device - Google Patents

Abstract

Provided are an attachment structure for a sliding scraper that adheres more reliably to a guide rail, and a linear guide device. This attachment structure is characterized by comprising: a slider that slidably sits astride a guide rail (12); a U-shaped attachment plate (16) that is attached to an end surface of the slider, and that has two vertical frames (18) and a lateral frame (20) connecting the vertical frames (18); and a sliding scraper (30A) that is fitted into a U-shaped groove (22) of the attachment plate (16), and that has two vertical parts (32), a lateral part (34) connecting the two vertical parts (32), and a groove part (36) which slides against the guide rail (12). The attachment structure is also characterized by protrusions (38) where the vertical frames (18) and the vertical parts (32) are in contact being provided to either at least open ends in the inner peripheral surfaces of the two vertical frames (18) of the attachment plate (16), or at least the ends in the outer side surfaces of the two vertical parts (32) of the sliding scraper (30A) that face said open ends.

Description

Sliding scraper mounting structure and linear guide device

The present invention relates to a sliding scraper mounting structure that is mounted on a slider that travels along a guide rail, and a linear guide device.

Conventionally, a linear guide device includes a guide rail and a slider slidably laid over the guide rail (Patent Document 1). A mounting plate is attached to the end surface of the slider in the sliding direction, and a sliding scraper is accommodated in a concave groove of the mounting plate.

This sliding scraper is made of an elastic material such as rubber, and is in contact with the upper surface and both side portions of the guide rail so as to prevent foreign matter from entering the slider through a gap with the guide rail.

Japanese Patent No. 4232389

The sliding scraper is formed by vulcanization molding of an elastomer such as rubber. However, when vulcanization molding is performed, the sliding scraper tends to shrink in the direction indicated by the arrow X in FIG. 8A after demolding.

When such a sliding scraper 7 is mounted on the mounting plate 2 and installed on the guide rail 3 as shown in FIG. 8B, both sides of the sliding scraper 7 and the guide rail 3 are deformed due to molding shrinkage. The gap 8 tends to occur between the two. There is a possibility that foreign matters such as dust may enter from the gap 8.

An object of the present invention is to provide a sliding scraper mounting structure and a linear guide device that are more securely in close contact with a guide rail.

A sliding scraper mounting structure according to the present invention includes a slider that is slidably straddled on a guide rail, and a slider that is attached to an end surface of the slider and that has both vertical frames and a horizontal frame connecting the vertical frames. A U-shaped mounting plate, a sliding scraper that is fitted in a U-shaped groove of the mounting plate, has both vertical portions and a horizontal portion that connects the vertical portions, and a groove portion that is in sliding contact with the guide rail, A vertical frame and a vertical portion at least at the opening end portion of the inner side surfaces of the two vertical frames of the mounting plate, or at least an end portion of the outer surface of the vertical portion of the sliding scraper facing the opening end portion. Protruding portions that are in contact with each other are provided.

A linear guide device according to the present invention includes a guide rail and a slider slidably straddled on the guide rail, and the slider is in a U-shaped groove of a mounting plate attached to an end surface in a sliding direction. Further, a linear guide device in which a sliding scraper having a groove portion that is in sliding contact with the guide rail is fitted, wherein the sliding scraper has the mounting structure described above.

The mounting structure of the sliding scraper according to the present invention opposes at least the opening end portion of the inner side surfaces of both vertical frames of the mounting plate, or at least the opening end portion of the outer side surfaces of both vertical portions of the sliding scraper. Protruding parts that contact the vertical frame and the vertical part are provided at the end, so both vertical parts of the sliding scraper are pressed toward the side of the guide rail, so that the sliding scraper is more securely attached to the side of the guide rail. It adheres and can prevent the invasion of foreign matter.

It is a perspective view which shows the linear guide apparatus which concerns on 1st Embodiment. It is a front view which shows the state which attached the sliding scraper which concerns on 1st Embodiment to the attachment plate. It is a front view which shows the state which attached the sliding scraper which concerns on the modification of 1st Embodiment to the attachment plate. FIG. 4A is a front view showing a state in which the sliding scraper according to the modification (1) of the second embodiment is attached to the attachment plate. FIG. 5A is a front view showing a state in which a sliding scraper according to a modification (2) of the second embodiment and FIG. 5B is attached to a mounting plate according to a modification (3) of the second embodiment. It is a front view which shows the state which attached the sliding scraper which concerns on 3rd Embodiment to the attachment plate. It is a front view which shows the state which attached the sliding scraper which concerns on 4th Embodiment to the attachment plate. 8A is a front view showing a conventional sliding scraper, and FIG. 8B is an explanatory view showing a state in which the sliding scraper of FIG. 8A is attached to a mounting plate.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1. First Embodiment As illustrated in FIG. 1, the linear guide device 10 </ b> A includes a guide rail 12 and a slider 14 slidably laid over the guide rail 12. Inside the slider 14 is provided a rolling element (not shown) such as a ball or a conical roller that moves along the side surface 19 of the guide rail 12.

A U-shaped mounting plate 16 is attached to at least one end face of the slider 14 in the sliding direction (indicated by an arrow S) with screws or the like. As shown in FIG. 2, the mounting plate 16 has a U-shaped groove 22 composed of both vertical frames 18 and a horizontal frame 20 connecting both the vertical frames 18.

An arc-shaped convex portion 24 that protrudes into the U-shaped groove 22 of the mounting plate 16 is formed at a substantially central portion of the horizontal frame 20 of the mounting plate 16. In the U-shaped groove 22 of the mounting plate 16, a sliding scraper 30 </ b> A that is slidably contacted with the upper surface and both side surfaces of the guide rail 12 by a groove portion 36 described later is fitted.

The vertical frame 18 and the horizontal frame 20 of the mounting plate 16 are provided with mounting screw holes 26 for mounting on the slider 14 described above. Further, a hole 25 penetrating the horizontal frame 20 is formed in the arc-shaped convex portion 24 provided in the horizontal frame 20 of the mounting plate 16. The hole 25 has a function of supplying grease to the linear guide device 10A, for example. The material of the mounting plate 16 is not particularly limited, and examples thereof include metals and resins.

As shown in FIG. 2, the sliding scraper 30 </ b> A is formed by both vertical portions 32, 32 and a horizontal portion 34 connecting both the vertical portions 32, 32. A groove 36 having a sliding layer in sliding contact with the guide rail 12 is formed.

Further, the sliding scraper 30A is provided with projections 38 that are in contact with the inner side surface of the vertical frame 18 of the mounting plate 16 on the outer side surfaces of both vertical portions 32, 32 facing the vertical frame 18 of the mounting plate 16, respectively. The protruding portion 38 is formed at an end portion (hereinafter also referred to as a lower end) that faces the opening end portion of the inner surface of the U-shaped groove 22 of the mounting plate 16.

Further, a recess 40 is provided on the outer surface of the horizontal portion 34 facing the horizontal frame 20 of the mounting plate 16. The concave portion 40 is provided in the vicinity of the substantially central portion of the lateral portion 34 and is in contact with the lower end portion of the convex portion 24 protruding into the U-shaped groove 22 of the mounting plate 16.

The protrusion 38 provided at the lower end of the sliding scraper 30 </ b> A is in contact with the vertical frame 18 on the side surface of the mounting plate 16. At this time, the length between the end faces of the protrusions 38, 38 is equal to or longer than the length between the vertical frames 18, 18 of the mounting plate 16 (that is, the length between the inner surfaces of the U-shaped groove 22). A somewhat large degree is preferable. Thereby, the sliding scraper 30 </ b> A can be pressed against the side surface of the guide rail 12 to suppress the formation of a gap.

The length L1 in the vertical direction of the protrusion 38 is 60% or less, preferably 50% or less, 5% or more, preferably 10% or more with respect to the height L2 of the vertical part 32 of the sliding scraper 30A. Preferably there is.

On the other hand, the concave portion 40 provided in the lateral portion 34 suppresses the formation of a gap between the upper surface of the guide rail 12 and the sliding scraper 30A as a result of being pressed against the lower end portion of the convex portion 24 of the mounting plate 16. can do.

The sliding scraper 30A can adjust the force of contact with the guide rail 12 by changing the size or shape of the protrusion 38 or the recess 40 or the position formed on the outer surface of the sliding scraper 30A. The protrusions 38 and the recesses 40 may be formed at the same time as the sliding scraper 30A is formed, or may be formed by cutting after the forming.

The sliding scraper 30A is fitted into the U-shaped groove 22 of the mounting plate 16, as shown in FIG. The U-shaped groove 22 may be formed inside the mounting plate 16, or may be formed on the front surface of the mounting plate 16 opposite to the mounting surface of the slider 14.

The mounting plate 16 also has a role of a pressing plate that presses the sliding scraper 30 </ b> A against the slider 14 when the mounting plate 16 is mounted on the slider 14.

The shape of the recess 40 is not limited to an arc shape as shown in FIG. 2, and may be, for example, a polygonal shape, a triangular shape, a quadrangular shape, or the like.

The sliding scraper 30A is composed of an elastic material (elastomer) having a sliding layer on the inner surface (that is, the surface on which the groove portion 36 is formed). The sliding layer is formed by integrating fibers and elastomer, has a low sliding resistance in contact with the guide rail 12, and is excellent in durability against sliding friction.

Elastomer mainly improves the durability of the fiber. Examples of the elastomer material include natural rubber, nitrile rubber, chloroprene rubber, hyperon, polybutadiene rubber, ethylene-propylene rubber (EPM), ethylene-propylene-diene terpolymer (EPDM), and hydrogenated acrylonitrile butadiene rubber. (H-NBR), elastomers such as silicon rubber, fluoro rubber, acrylic rubber, styrene butadiene rubber, chlorinated polyethylene rubber, millable urethane, thermosetting polyurethane, thermoplastic polyurethane or thermoplastic polyester. used.

The elastomer constituting the sliding layer may be blended with a vulcanizing agent, a vulcanization acceleration aid and a reinforcing agent. Examples of the vulcanizing agent include organic peroxides such as dicumyl peroxide, organic sulfur compounds, and metal oxides. Examples of the vulcanization acceleration aid include fatty acids such as stearic acid, metal oxides, and the like. Examples of the reinforcing agent include carbon black and white carbon. Furthermore, for example, anti-aging agents, fillers, plasticizers, pressure-sensitive adhesives and the like can also be blended. In addition to these, in order to reduce sliding resistance, a solid lubricant such as graphite, silicon oil, fluorine powder, or molybdenum disulfide may be included in the elastomer.

The fibers constituting the sliding layer can reduce the sliding resistance around the guide rail 12 by making sliding contact with the guide rail 12. Examples of the material of the fiber include nylon fiber, aramid fiber, polyester fiber, carbon fiber, Teflon (registered trademark) fiber, liquid crystal polymer fiber, glass fiber, and cotton yarn. The fiber may be in the form of a cloth material or may be mixed with the elastomer in the form of a short fiber.

The sliding layer may include a cloth material impregnated with an elastomer. When the form of the fiber is a cloth material, the cloth material and the elastomer are integrated at the time of molding so that the cloth material slides in contact with the guide rail 12. On the other hand, in the case of a short fiber form, the short fiber is mixed into the elastomer and integrally molded. Examples of the cloth material include woven cloth, knitted cloth, and non-woven cloth.

As described above, the sliding scraper 30 </ b> A is provided between the guide rail 12 by providing the vertical portion 32 with the protruding portion 38 that contacts the inner surface of the vertical frame 18 in the U-shaped groove 22 of the mounting plate 16. A gap is not generated, and entry of foreign matter can be prevented. Furthermore, since it adheres uniformly to the guide rail 12, excessive sliding resistance does not occur. By attaching such a sliding scraper 30 </ b> A to the slider 14 as shown in FIG. 1, the linear guide device 10 </ b> A can be smoothly moved on the guide rail 12.

Both the vertical portions 32, 32 of the sliding scraper 30 </ b> A are pressed against the side surface of the guide rail 12 by the protrusion 38 being in contact with the vertical frame 18. Intrusion of foreign matter can be prevented.

Since the sliding scraper 30A includes the sliding layer, the sliding resistance can be reduced, the guide rail 12 can be moved smoothly, and the durability can be improved.

(Modification)
FIG. 3 shows a modification of the sliding scraper 30A shown in FIG. In the sliding scraper 30B shown in the figure, a notch 42 is formed on the outer surface of the vertical portion 41 on both sides, and protrusions 43 and 44 are formed on the lower end and the upper end via a gap formed by the notch 42, respectively. It is formed. A gap is formed between the protrusion 44 at the upper end and the mounting plate 16 by a chamfer 45 formed at the upper end of the sliding scraper 30B.

Here, the total length (L3 + L4) in the vertical direction of the two protrusions 43 and 44 is 60% or less, preferably 50%, with respect to the height L5 of the vertical portion 41 of the sliding scraper 30B, as described above. Below, it is 5% or more, preferably 10% or more.

Others are the same as the mounting structure of the sliding scraper 30A shown in FIG.

In the case of this modification, both the vertical portions 41, 41 of the sliding scraper 30B are pressed toward the side surface of the guide rail 12 by the protrusions 43, 44 being in contact with the vertical frame 18, so that The same effect as the form can be obtained.

In the case of the present embodiment, the sliding scraper has been described as having a sliding layer on the surface on which the groove portion 36 is formed, but may be omitted as appropriate.

2. Second Embodiment FIGS. 4A and 4B show the attachment structure of sliding scrapers 48A and 48B according to a second embodiment of the present invention, respectively. Similar to the sliding scraper 30A shown in FIG. 2, the sliding scraper 48A shown in FIG. 4A has a protrusion 54 that contacts the vertical frame 53 of the mounting plate 52 at the lower end of the outer surface of the vertical portion 50. Yes.

Further, a concave portion 56 is formed at a substantially central portion of the horizontal portion 55 of the sliding scraper 48A, and an arc-shaped convex portion 57 is in contact with a substantially central portion of the horizontal frame 59 of the mounting plate 52. At this time, a gap 58 </ b> A is formed between the horizontal frame 59 and the horizontal portion 55 of the sliding scraper 48 </ b> A except for the contact portion between the concave portion 56 and the convex portion 57.

Further, the mounting plate 52 is formed with a protruding portion 61 protruding inwardly at the lower end of the vertical frame 53, and a gap 60A is also formed between the protruding portion 61 and the lower end surface of the sliding scraper 48A. Yes.

By providing the gaps 58A and 60A, a clearance portion of the sliding scraper 48A can be secured and the sliding resistance can be lowered. Others are the same as the above-mentioned embodiment.

Since both the vertical portions 50, 50 of the sliding scraper 48A are pressed toward the side surface of the guide rail 12 when the protruding portion 54 is in contact with the vertical frame 53, the same effect as in the above embodiment can be obtained. .

FIG. 4B shows a modification of the sliding scraper 48A shown in FIG. 4A. As shown in FIG. 4B, the sliding scraper 48B is formed with a notch 63 on the outer surface of the vertical part 62 on both sides connected by the horizontal part 55, and a lower end part through a gap formed by the notch 63. Protrusions 64 and 65 are formed at the upper end portions, respectively. Others are the same as those of the above-described embodiment, and thus the same reference numerals are given and the description thereof is omitted.

Since the gaps 58A and 60A are provided, the same effects as in the present embodiment can be obtained. Further, since both the vertical portions 62 of the sliding scraper 48B are pressed toward the side surface of the guide rail 12 by the protrusions 64 and 65 being in contact with the vertical frame 53, the same effect as that of the first embodiment is obtained. Is obtained.

5A and 5B show attachment structures of sliding scrapers 48C and 48D according to still other embodiments of the present invention, respectively. Similar to the sliding scraper 30A shown in FIG. 2, the sliding scraper 48C shown in FIG. 5A has a protrusion 54 that contacts the vertical frame 53 of the mounting plate 52 at the lower end of the outer surface of the vertical portion 50. Yes.

Further, the concave portion 56 as shown in FIG. 4A is not formed in the substantially central portion of the horizontal portion 66 of the sliding scraper 48C, but an arc shape formed in the substantially central portion of the horizontal frame 59 of the mounting plate 52. The convex portion 57 directly contacts the lateral portion 66. At this time, a gap 58B is formed between the horizontal frame 59 and the horizontal portion 66 of the sliding scraper 48C except for the contact portion of the convex portion 57.

Also, the mounting plate 52 has a gap 60B formed between the projecting portion 61 projecting inwardly at the lower end of the vertical frame 53 and the lower end surface of the sliding scraper 48C. Others are the same as the above-mentioned embodiment.

Since the gaps 58B and 60B are provided, the same effects as in the present embodiment can be obtained. Further, since both the vertical portions 50, 50 of the sliding scraper 48C are pressed toward the side surface of the guide rail 12 by the projection 54 being in contact with the vertical frame 53, the same effect as in the first embodiment is obtained. Is obtained.

The sliding scraper 48D shown in FIG. 5B is the same as the sliding scraper 48C shown in FIG. 5A, except that a notch 67 is provided at the upper end of the outer surface of the vertical portion 50.

In the case of the present embodiment, the case where the convex portion 57 is provided on the horizontal frame 59 has been described, but the present invention is not limited to this, and the convex portion may be provided on the outer surface of the horizontal portions 55 and 66.

3. 3rd Embodiment In the case of the said 1st and 2nd embodiment, although the case where the protrusion part which protruded toward the vertical frame of the attachment plate was provided in both the vertical parts of a sliding scraper was demonstrated, this invention is not limited to this. Absent. For example, as shown in FIG. 6, a protrusion 77 and a protrusion 78 may be provided on the horizontal frame 76 and the vertical frame 75 of the mounting plate 74, respectively. The length L6 in the vertical direction of the protrusion 78 is 60% or less, preferably 50% or less, 5% or more, preferably 10% or more with respect to the height L7 of the vertical part 72 of the sliding scraper 71. Is preferred.

The vertical portion 72 and the horizontal portion 73 of the sliding scraper 71 are straight lines, that is, the vertical portions 72 and 72 and the horizontal portion 73 of the sliding scraper 71 have a flat outer surface on the mounting plate 74 side.

In addition, the code | symbol 17 is a screw hole for attachment provided in order to fix the guide rail 12 with a screw etc.

In the case of this embodiment, since both the vertical portions 72 and 72 of the sliding scraper 71 are pressed toward the side surface of the guide rail 12 by the projections 78 of the mounting plate 74, the same effect as in the first embodiment can be obtained. .

4). Fourth Embodiment Next, a sliding scraper mounting structure according to a fourth embodiment will be described. The same components as those in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted for the sake of brevity.

As shown in FIG. 7, the sliding scraper 80 includes both vertical portions 81, 81 and a horizontal portion 83 connecting the vertical portions 81, 81, and a groove portion 90 that is in sliding contact with the guide rail 12 is formed. Protrusions 84 and 84 that contact the inner surface of the vertical frame 53 of the mounting plate 52 are provided on the outer surfaces of the lower ends of both the vertical portions 81 and 81. A sliding layer 86 is provided on the inner surface of the groove portion 90 and the lower end surfaces 87 of the vertical portions 81 and 81. A notch 85 is provided at the upper end of the outer surface of both the vertical portions 81, 81.

The sliding layer 86 of the sliding scraper 80 has a flat surface parallel to the moving direction of the slider 14 and is in contact with the surface of the guide rail 12 on the flat surface. The thickness of the sliding scraper 80 is not particularly limited, but may be, for example, 0.5 to 8.0 mm, preferably 1.0 to 5.0 mm.

Since both the vertical portions 81 and 81 of the sliding scraper 80 are pressed toward the side surface of the guide rail 12 by the protrusion 84 being in contact with the vertical frame, the same effect as in the first embodiment is obtained. It is done.

In the case of the present embodiment, the sliding scraper 80 includes a sliding layer 86 that contacts the guide rail 12 on a flat surface, thereby suppressing sliding resistance against the surface of the guide rail 12 and improving durability. be able to.

Since the sliding scraper 80 is provided with the sliding layer 86 also on the lower end surface 87 that does not contact the guide rail 12, damage such as cracking of the vertical portion 81 due to foreign matter or the like can be prevented.

5). Modifications The present invention is not limited to the above embodiments, and various improvements and modifications can be made within the scope of the claims. For example, the configurations of the first to fourth embodiments may be appropriately combined. Specifically, a sliding layer provided on the inner surface of the groove and the lower end surfaces of both vertical portions may be applied to the first to third embodiments.

In the description of the first to third embodiments, only one sliding scraper is attached to the mounting plate. However, a plurality of sliding scrapers may be overlapped and attached to the mounting plate.

10A Linear guide device 12 Guide rail 14 Slider 16, 52, 74 Mounting plate 18, 53, 75 Vertical frame 20, 59, 76 Horizontal frame 22 U-shaped groove 24 Protrusion 30A, 48A, 71, 80 Sliding scraper 32, 41 , 50, 62, 72, 81 Vertical portion 34, 55, 66, 73, 83 Horizontal portion 36, 90 Groove portion 38, 54, 64, 78, 84 Protrusion portion 40, 56 Recess portion 43, 44 Protrusion portion 57, 77 Protrusion portion 86 Sliding layer 87 Lower end surface

Claims (8)

1. A slider slidably straddled on the guide rail;
   A U-shaped mounting plate attached to the end face of the slider and having both vertical frames and a horizontal frame connecting the vertical frames;
   A sliding scraper that is fitted in the U-shaped groove of the mounting plate, and has a horizontal portion that connects both vertical portions and the vertical portions, and a groove portion that is in sliding contact with the guide rail,
   A vertical frame and a vertical portion at least at the opening end portion of the inner side surfaces of the two vertical frames of the mounting plate, or at least an end portion of the outer surface of the vertical portion of the sliding scraper facing the opening end portion. A structure for mounting a sliding scraper, characterized in that a protrusion is provided on which the abutment contacts.
2. The convex part which the said horizontal frame and the said horizontal part contact | abut is provided in the inner surface of the said horizontal frame of the said attachment plate, or the outer surface of the said horizontal part facing the said horizontal frame. Mounting structure of sliding scraper.
3. A concave portion is formed on the outer surface of the horizontal portion of the sliding scraper facing the horizontal frame of the mounting plate, and the convex portion formed on the inner surface of the horizontal frame of the mounting plate abuts on the concave portion. The sliding scraper mounting structure according to claim 2, wherein the sliding scraper is mounted.
4. The sliding scraper according to any one of claims 1 to 3, wherein the sliding scraper is an elastic material having a sliding layer in which fibers and an elastomer are integrated on the inner surface of the groove. Mounting structure.
5. The sliding scraper mounting structure according to claim 4, wherein the sliding layer includes a cloth material impregnated with the elastomer.
6. The sliding scraper mounting structure according to claim 4 or 5, wherein the sliding layer has a flat surface parallel to a moving direction of the slider.
7. The sliding scraper mounting structure according to any one of claims 4 to 6, wherein the sliding layer is provided on an inner surface of the groove portion and lower end surfaces of the vertical portions.
8. A guide rail and a slider slidably straddled on the guide rail, the slider being in a U-shaped groove of a mounting plate attached to an end surface in the sliding direction, a groove portion that is in sliding contact with the guide rail A linear guide device in which a sliding scraper having
   A linear guide device, wherein the sliding scraper has the mounting structure according to any one of claims 1 to 7.

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