JP7105175B2 - sliding bearing - Google Patents

Description

The present invention relates to sliding bearings.

As a seismic isolation mechanism that reduces the transmission of energy generated during vibrations due to wind, thermal expansion, earthquakes, etc. to structures such as buildings and detached houses, between the upper and lower structures of the structure A slide bearing is known which is disposed in the upper structure and supports the upper structure so as to slide horizontally with respect to the lower structure when vibrating.
Such sliding bearings generally include a lower shoe fixed to the top of the lower structure of the structure, an upper shoe fixed to the bottom of the upper structure of the structure, and a pair of shoes between the lower and upper shoes. and an intervening slider (see, for example, Patent Literature 1).

The sliding bearing described in Patent Document 1 includes a lower shoe having a V-shaped concave lower sliding contact surface on its upper surface, an upper shoe having a Λ-shaped concave upper sliding contact surface on its lower surface, a lower sliding contact surface and an upper sliding contact surface. and a slider interposed between the sliding contact surface. The slider has a V-shaped convex lower sliding surface slidable in the XX direction along the lower sliding contact surface, and a YY direction perpendicular to the XX direction along the upper sliding contact surface. and a Λ-shaped convex upper sliding surface that is slidable.

The sliders are normally positioned at the longitudinally central portion of the lower sliding contact surface of the lower shoe and the longitudinally central portion of the upper sliding contact surface of the upper shoe. In the event of vibration due to an earthquake or the like, the slider slides in the XX direction along the lower sliding contact surface and in the YY direction along the upper sliding contact surface so as to follow the vibration. do.

JP 2013-130216 A

In the normal state, the slider is located in the center of the longitudinal direction of the lower sliding contact surface of the lower shoe. Foreign matter such as may adhere. In this case, when the slider slides against the lower shoe due to vibration caused by an earthquake or the like, foreign matter may get caught between the lower sliding surface of the slider and the lower sliding contact surface of the lower shoe. The lower sliding surface and the lower sliding contact surface may be damaged. When such damage occurs, the slider cannot sufficiently follow the vibration, and the seismic isolation function deteriorates.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slide bearing capable of suppressing foreign matter from getting caught between a lower shoe and a slider.

The sliding bearing of the present invention has a V-shaped concave lower sliding contact surface on the upper surface, a lower shoe fixed to the upper part of the lower structure of the structure, and a Λ-shaped concave upper sliding contact surface on the lower surface. , an upper shoe fixed to the bottom of the upper structure of the structure, a lower sliding surface slidable in one direction with respect to the lower sliding contact surface, and the one direction with respect to the upper sliding contact surface. a slider having an upper sliding surface slidable in the other perpendicular direction; and a lower sliding surface provided on the slider, the lower sliding surface being positioned at the center of the lower sliding contact surface in the one direction. a dust cover that covers at least a part of the exposed portion of the lower sliding contact surface in the state where the lower sliding contact surface is located.

According to the present invention, the dust cover provided on the slider is positioned at the center of the lower sliding contact surface of the lower shoe in the one direction, while the lower sliding surface of the slider is located in the lower shoe. Since at least a part of the exposed portion of the lower sliding contact surface of the is covered, it is possible to prevent foreign matter such as dust from adhering to the exposed portion. As a result, foreign matter can be prevented from getting caught between the lower shoe and the slider when the slider slides on the lower shoe. As a result, the lower sliding contact surface of the lower shoe and the lower sliding surface of the slider are less likely to be damaged, so deterioration of the seismic isolation function can be suppressed.

It is preferable that the dust cover includes a flexible cover body and a reinforcing member that reinforces the cover body.
In this case, since the cover main body having flexibility is reinforced by the reinforcing member, even if the cover main body protrudes from the lower shoe due to the sliding of the slider on the lower sliding contact surface, the protruding portion remains downward. not drooping. As a result, foreign matter such as dust on the ground can be prevented from adhering to the protruding portion of the cover main body, so that the foreign matter can be prevented from adhering to the exposed portion of the lower sliding contact surface through the cover main body. can.

The dust cover preferably has a contact surface that makes surface contact with the at least part of the lower sliding contact surface.
In this case, the contact surface of the dust cover can effectively prevent foreign matter such as dust from adhering to the exposed portion of the lower sliding contact surface of the lower shoe.

The dust cover preferably covers the entire exposed portion of the lower sliding contact surface with a margin around it.
In this case, the entire exposed portion of the lower sliding contact surface of the lower shoe can be reliably covered with the dust cover, so that foreign matter such as dust can be more effectively prevented from adhering to the exposed portion.

It is preferable that the slide bearing further includes a skirt member that hangs downward from the exposed portion of the dust cover from the marginal dimension portion.
In this case, the skirt member covers the space between the dust cover and the exposed portion of the lower sliding contact surface, thereby suppressing the entry of foreign matter such as dust between the dust cover and the exposed portion of the lower sliding contact surface. can do.

The dust cover has a fixed portion fixed to the slider at one end in the one direction, and a rotating portion connected to the other end of the fixed portion in the one direction so as to be vertically rotatable. , is preferably provided.
In this case, for example, when the slider slides on the lower sliding contact surface, even if the rotating portion of the dust cover comes into contact with the wall surface of the structure, etc., the rotating portion does not move against the fixed portion. By rotating upward, it is possible to reduce the impact caused by the contact between the rotating portion and the wall surface. As a result, the dust cover can be prevented from coming into contact with the outside such as the wall surface and being damaged.

The rotating portion is rotatable between a lower rotating position and an upper rotating position, and a rotating angle between the lower rotating position and the upper rotating position of the rotating portion is It is preferable that the rotating portion is set at an angle that allows downward rotation by its own weight from the upper rotating position.
In this case, for example, after the rotating portion of the dust cover comes into contact with the wall surface of the structure or the like and rotates upward from the lower rotating position to the upper rotating position, the slider slides away from the wall surface. Then, the rotating portion is released from contact with the wall surface, and is rotated downward by its own weight from the upper rotating position. Therefore, even if the rotating portion rotates upward from the lower rotating position, the sliding of the slider automatically rotates the rotating portion downward and returns it to the lower rotating position.

ADVANTAGE OF THE INVENTION According to this invention, it can suppress that a foreign material gets caught between a lower shoe and a slider.

1 is a plan view showing a sliding bearing according to a first embodiment of the invention; FIG. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1; FIG. 2 is a cross-sectional view taken along line BB of FIG. 1; It is the perspective view which looked at the slider from the downward direction. It is the perspective view which looked at the slider from upper direction. FIG. 4 is a plan view of the slide bearing showing a state in which a pair of dust covers are fixed to the slider; FIG. 7 is a CC arrow view of FIG. 6; FIG. 4 is a side view showing a state in which a dust cover composed only of a cover body is slid together with a slider; FIG. 4 is a side view showing a state in which the dust cover of the first embodiment has slid together with the slider; FIG. 5 is a side view showing a sliding bearing according to a second embodiment of the invention; FIG. 11 is an end view taken along line DD of FIG. 10; FIG. 11 is a side view showing a state in which the dust cover of the second embodiment has slid together with the slider; FIG. 11 is a side view showing a sliding bearing according to a third embodiment of the invention; FIG. 11 is a side view showing a state where the dust cover of the third embodiment has slid together with the slider;

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. At least part of the embodiments described below may be combined arbitrarily.
[First embodiment]
[Overall configuration of slide bearing]
1 is a plan view showing a sliding bearing according to a first embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line AA of FIG. 1. FIG. In FIGS. 1 and 2, a sliding bearing 10 is interposed between a lower structure 1 and an upper structure 2 of a structure such as a building or a detached house. The upper structure 2 is horizontally slid and supported with respect to the lower structure 1 so as to follow the vibration.

The slide bearing 10 of this embodiment includes a lower shoe 11 fixed to the upper surface of the lower structure 1 via the lower base plate 3 and an upper shoe 12 fixed to the bottom surface of the upper structure 2 via the upper base plate 4. , a slider 13 interposed between the lower shoe 11 and the upper shoe 12, and a pair of dust covers 30 fixed to the slider 13 (see FIG. 6). 1 and 2, illustration of the dust cover 30 is omitted (the same applies to FIGS. 3 to 5).

[Underwear]
The lower shoe 11 includes, for example, a lower shoe body 11a made of a block shaped like a rectangular parallelepiped, a lower slide plate 11b fixed to the upper surface of the lower shoe body 11a, and fixed to both side surfaces of the shoe body 11a. and a pair of stoppers 11d fixed to both longitudinal end surfaces of the lower shoe main body 11a. The lower shoe 11 is arranged with its longitudinal direction oriented in one direction (the XX direction in the drawing). The upper surface of the lower shoe main body 11a is formed in a gentle V-shaped concave shape when viewed from the side.

The lower slide plate 11b and the lower side slide plate 11c are made of, for example, a stainless steel plate, a surface-treated stainless steel plate, or a thin plate plated with hard chrome. The lower slide plate 11b is formed along the shape of the upper surface of the lower shoe body 11a in a side view. The upper surface of the lower slide plate 11b is a V-shaped concave lower sliding contact surface 11b1 on which a first lower sliding bearing 14 (described later) of the slider 13 slides. The lower sliding contact surface 11b1 is inclined at a predetermined inclination angle θ with respect to the horizontal plane.
The lower side slide plate 11c is formed in a gentle V shape corresponding to the shape of the upper surface of the lower shoe main body 11a when viewed from the side. The outer surface of the lower side slide plate 11c serves as a lower guide sliding contact surface 11c1 on which a second lower sliding bearing 18 (described later) of the slider 13 slides.

The stopper 11d extends in the width direction (YY direction) of the lower shoe main body 11a, and both widthwise ends of the stopper 11d protrude outward in the width direction from the lower side slide plate 11c. As a result, when the slider 13 slides to both ends in the XX direction, a pair of lower protrusions 17 (described later) of the slider 13 come into contact with both ends in the width direction of the stopper 11d. , the slider 13 is prevented from coming off from both ends in the XX direction of the lower shoe body 11a.

[Upper]
FIG. 3 is a cross-sectional view taken along line BB of FIG. As shown in FIGS. 1 and 3, the upper shoe 12 includes an upper shoe body 12a made of, for example, a substantially rectangular parallelepiped block body, an upper slide plate 12b fixed to the lower surface of the upper shoe body 12a, A pair of upper side slide plates 12c fixed to both side surfaces of the upper shoe body 12a. The upper shoe 12 is arranged with its longitudinal direction oriented in the YY direction which is horizontally perpendicular to the longitudinal direction of the lower shoe 11 . The lower surface of the upper shoe main body 12a is formed in a gentle Λ-shaped concave shape when viewed from the side.

The upper slide plate 12b and the upper side slide plate 12c are made of, for example, a stainless steel plate, a surface-treated stainless steel plate, or a thin plate plated with hard chrome. The upper slide plate 12b is formed along the shape of the lower surface of the upper shoe body 12a in a side view. The lower surface of the upper slide plate 12b is a Λ-shaped concave upper sliding contact surface 12b1 on which a first upper sliding bearing 15 (described later) of the slider 13 slides. The upper sliding contact surface 12b1 is inclined with respect to the horizontal plane at a predetermined inclination angle θ (the same angle as the inclination angle with respect to the horizontal plane of the lower sliding contact surface 11b1).
The upper side slide plate 12c is formed in a gentle Λ shape corresponding to the shape of the lower surface of the upper shoe body 12a when viewed from the side. An outer side surface of the upper side slide plate 12c serves as an upper guide sliding contact surface 12c1 on which a second upper slide bearing 23 (described later) of the slider 13 slides.

[Slider]
FIG. 4 is a perspective view of the slider 13 as seen from below. In FIGS. 3 and 4, the slider 13 has a slider main body 13a made of, for example, a substantially square block. The lower surface of the slider main body 13a is formed in a gentle V-shaped convex shape corresponding to the lower sliding contact surface 11b1 of the lower shoe 11. As shown in FIG. Specifically, the lower surface of the slider main body 13a is composed of a pair of lower inclined surfaces 13a1 formed so as to protrude gradually downward from both ends in the XX direction toward the center. .

The slider 13 has a pair of first lower slide bearings 14 fixed to each lower inclined surface 13a1 of the slider body 13a. Each first lower sliding bearing 14 is made of, for example, a PTFE (polytetrafluoroethylene)-based, PA (polyamide)-based, or POM (polyacetal)-based resin. A lower sliding surface 14a is slidable in the XX direction with respect to the contact surface 11b1.

FIG. 5 is a perspective view of the slider 13 viewed from above. As shown in FIGS. 2 and 5, the upper surface of the slider main body 13a is formed in a gentle Λ-shaped convex shape corresponding to the upper sliding contact surface 12b1 of the upper shoe 12. As shown in FIGS. Specifically, the upper surface of the slider main body 13a is composed of a pair of upper inclined surfaces 13a2 which are formed so as to gradually protrude upward from both ends in the YY direction toward the center. .

The slider 13 has a pair of first upper slide bearings 15 fixed to each upper inclined surface 13a2 of the slider main body 13a. Each first upper slide bearing 15 is made of a resin such as PTFE, PA, or POM (polyacetal), and its upper surface faces the upper sliding contact surface 12b1 of the upper shoe 12 in the YY direction. is an upper sliding surface 15a that is slidable.

As shown in FIG. 4, the slider 13 is provided with a pair of lower guide portions 16 on both sides of the lower inclined surface 13a1 of the slider main body 13a. Each lower guide portion 16 includes a lower projecting portion 17 integrally formed with the slider main body 13a so as to project downward from the lower inclined surface 13a1, and both ends of the inner surface of the lower projecting portion 17 in the XX direction. It is composed of a pair of second lower sliding bearings 18 fixed to the part. The second lower slide bearing 18 has a lower guide sliding surface 18a that can slide on the lower guide slide contact surface 11c1 that is the side surface of the lower shoe 11. As shown in FIG.

As shown in FIG. 5, the slider 13 is provided with a pair of upper guide portions 21 on both sides of the upper inclined surface 13a2 of the slider main body 13a. Each upper guide portion 21 includes an upper projecting portion 22 formed integrally with the slider main body 13a so as to project upward from the upper inclined surface 13a2, and both YY direction ends of the inner surface of the upper projecting portion 22. and a pair of second upper sliding bearings 23 fixed to the part. The second upper slide bearing 23 has an upper guide slide surface 23a that is slidable with respect to the upper guide slide contact surface 12c1, which is the side surface of the upper shoe 12. As shown in FIG.

As a result, the slider 13 is held by the pair of lower guides 16 with respect to the lower shoe 11 so as to be slidable only in the XX direction, and with respect to the upper shoe 12 by the pair of upper guides 21. It is held slidable only in the YY direction. Therefore, when an arbitrary relative displacement occurs between the lower structure 1 and the upper structure 2 in the horizontal direction due to vibration due to an earthquake or the like, the slider 13 does not contact the lower sliding contact surface 11b1 of the lower shoe 11. Relatively displaced in the XX direction and in the YY direction with respect to the upper sliding contact surface 12b1 of the upper shoe 12, an arbitrary displacement occurring between the lower structure 1 and the upper structure 2 is caused. can be displaced following the relative displacement in the horizontal direction (all directions).

The slider 13 is normally located at the reference position shown in FIG. 1 (when not vibrating). At this reference position, the slider 13 is positioned at the center of the lower shoe 11 in the longitudinal direction (XX direction) and at the center of the upper shoe 12 in the longitudinal direction (YY direction).

[Dust cover]
FIG. 6 is a plan view of the slide bearing 10 showing a state where the slider 13 is provided with a pair of dust covers 30. FIG. 7 is a view taken along the line CC of FIG. 6. FIG. 6 and 7, illustration of the upper shoe 12 is omitted. 6 and 7, the pair of dust covers 30 are in a state where the slider 13 is positioned at the reference position, that is, the lower sliding surface 14a of the slider 13 is positioned on the lower sliding contact surface 11b1 of the lower shoe 11. It covers the exposed portion of the lower sliding contact surface 11b1 excluding the central portion while positioned in the central portion in the XX direction. In this embodiment, the pair of dust covers 30 are attached to both side surfaces 13a3 of the slider main body 13a in the XX direction. Each dust cover 30 covers exposed portions 11b2 of the lower sliding contact surface 11b1 exposed on both sides in the XX direction from the slider 13 at the reference position.

Each dust cover 30 includes a flexible cover body 31 and a reinforcing body 32 that reinforces the cover body 31 . Note that the cover main body 31 is shown with cross-hatching in FIG. 7 (the same applies to FIGS. 8 and 9).
The reinforcing body 32 is formed by bending a flat plate member made of a synthetic resin material such as polyvinyl chloride into a substantially L shape, and has a vertical plate portion 33 and a horizontal plate portion 34 .

The vertical plate portion 33 of the reinforcing member 32 is fixed by a plurality of (four in FIG. 6) screws 41 in contact with the lower end portion of the side surface 13a3 of the slider body 13a. Specifically, a plurality of screw holes 13a4 are formed in the width direction of the side surface 13a3 of the slider main body 13a (see also FIGS. 3 and 4). The screw 41 passing through 33 in the plate thickness direction is screwed through a washer 42 .

The horizontal plate portion 34 of the reinforcing body 32 is arranged above the lower sliding contact surface 11 b 1 of the lower shoe 11 . The length of the horizontal plate portion 34 in the XX direction is longer than the length of the exposed portion 11b2 of the lower sliding contact surface 11b1 in the same direction by a margin L. As shown in FIG. The width of the horizontal plate portion 34 in the YY direction is slightly narrower than the width of the slider main body 13a in the same direction, and the width of the lower sliding contact surface 11b1 in the same direction is larger than the width of the lower sliding contact surface 11b1 in the same direction. and is widened by the allowance dimension W2.

The lower surface 34a of the horizontal plate portion 34 is inclined with respect to the horizontal plane so as to be parallel to the exposed portion 11b2 of the lower sliding contact surface 11b1. That is, the lower surface 34a of the lateral plate portion 34 is inclined with respect to the horizontal plane so as to have the same inclination angle θ as the lower sliding contact surface 11b1 with respect to the horizontal plane.

The cover main body 31 is made of, for example, a flat plate-like fibrous material (felt) having flexibility and softness, and the upper surface of the cover main body 31 is adhered to the lower surface 34 a of the horizontal plate portion 34 of the reinforcing member 32 . Thereby, the cover main body 31 is reinforced by the reinforcing member 32 so as not to bend. Further, the lower surface 31a of the cover body 31 is inclined with respect to the horizontal plane so as to be parallel to the lower surface 34a of the lateral plate portion 34 with the adhesive layer 35 interposed therebetween. Therefore, the lower surface 31a of the cover main body 31, like the lower surface 34a of the lateral plate portion 34, is inclined with respect to the horizontal plane so as to have the same inclination angle as the inclination angle θ with respect to the horizontal plane of the lower sliding contact surface 11b1. .

The length in the XX direction and the width in the YY direction of the cover body 31 are set to the same dimensions as those of the horizontal plate portion 34 . The cover main body 31 has a predetermined thickness, and its lower surface 31a serves as a contact surface that makes surface contact with the entire exposed portion 11b2 of the lower sliding contact surface 11b1. Thus, the cover main body 31 covers the entire exposed portion 11b2 of the lower sliding contact surface 11b1 with margins L, W1 and W2 around it while being in surface contact with the exposed portion 11b2. Since the cover body 31 is made of flexible felt as described above, even if the cover body 31 slides together with the slider 13, the exposed portion 11b2 of the lower sliding contact surface 11b1 is not damaged by the cover body 31. You can prevent sticking.

[Effect]
As described above, according to the slide bearing 10 of the first embodiment, in a state where the lower sliding surface 14a of the slider 13 is positioned at the center of the lower sliding contact surface 11b1 of the lower shoe 11 in the XX direction, The dust cover 30 fixed to the slider 13 covers the exposed portion 11b2 of the lower sliding contact surface 11b1 of the lower shoe 11 except for the central portion, thereby suppressing foreign matter such as dust from adhering to the exposed portion 11b2. can do. As a result, when the slider 13 slides on the lower shoe 11 , it is possible to prevent foreign matter from getting caught between the lower shoe 11 and the slider 13 . As a result, the lower sliding contact surface 11b1 of the lower shoe 11 and the lower sliding surface 14a of the slider 13 are less likely to be damaged, so deterioration of the seismic isolation function can be suppressed.

Further, since the lower surface 31a of the cover main body 31 is in surface contact with the exposed portion 11b2 of the lower sliding contact surface 11b1, it is possible to effectively prevent foreign matter from adhering to the exposed portion 11b2 of the lower sliding contact surface 11b1.

Further, since the flexible cover main body 31 of the dust cover 30 is reinforced by the reinforcing member 32, the following effects are obtained. For example, as shown in FIG. 8, when the dust cover 30 is composed only of a flexible cover body 31, the slider 13 is located on one side of the lower shoe 11 in the XX direction ( ) and the cover main body 31 on the one side protrudes from the lower shoe 11, the protruding portion 31b hangs downward and comes into contact with the ground, and foreign matter such as dust on the ground falls on the protruding portion 31b. It may adhere. In this case, when the slider 13 slides from the state shown in FIG. It adheres to the exposed portion 11b2 of the contact surface 11b1. On the other hand, in this embodiment, as shown in FIG. 9, the slider 13 slides to one side in the XX direction with respect to the lower shoe 11, and the cover main body 31 on the one side moves toward the lower shoe. Even if it protrudes from 11, the protruding portion 31b is reinforced by the reinforcing member 32, so that it does not hang down. As a result, foreign matter such as dust on the ground can be prevented from adhering to the protruding portion 31b of the cover main body 31, so that the foreign matter is exposed to the lower sliding contact surface 11b1 through the protruding portion 31b of the cover main body 31. It is possible to prevent it from adhering to the portion 11b2.

Further, since the cover main body 31 covers the entire exposed portion 11b2 of the lower sliding contact surface 11b1 with allowances L, W1 and W2 around it, the cover main body 31 reliably covers the exposed portion 11b2. be able to. As a result, it is possible to more effectively prevent foreign matter from adhering to the exposed portion 11b2 of the lower sliding contact surface 11b1.

[Second embodiment]
FIG. 10 is a side view showing a slide bearing 10 according to a second embodiment of the invention. The slide bearing 10 of this embodiment differs from that of the first embodiment in that the dust cover 30 is provided with a skirt member 50 .
In FIG. 10, the skirt member 50 includes a pair of side skirts 51 hanging downward from both ends of the dust cover 30 in the width direction (portions of margins W1 and W2 (see FIG. 6)), and a pair of side skirts 51 extending in the longitudinal direction of the dust cover 30. and an end skirt 52 that hangs downward from the outer end (the portion of the allowance L (see FIG. 6)).

11 is an end view taken along line DD of FIG. 10. FIG. 10 and 11, each side skirt 51 is made of, for example, a rubber material, and is formed to extend vertically on both sides of the dust cover 30 in the width direction. An upper end portion of each side skirt 51 is fixed to both widthwise ends of the reinforcing member 31 (horizontal plate portion 34 ) of the dust cover 30 . In the state shown in FIG. 10, the lower end of each side skirt 51 extends downward from the exposed portion 11b2 of the lower sliding contact surface 11b1 at the widthwise outer side of the exposed portion 11b2.

For example, as shown in FIG. 12, when the slider 13 slides to one side (right side in the figure) in the XX direction relative to the lower shoe 11, the slider 13 slides to the other side in the XX direction. A gap S is formed between the cover main body 31 and the exposed portion 11b2 of the lower sliding contact surface 11b1 located on the side (left side in the drawing). Therefore, the vertical length of the side skirts 51 is preferably set to a length that allows the side skirts 51 to cover the gap S from the outside in the width direction.

In FIG. 10, the end skirt 52 is made of, for example, a rubber material, and extends obliquely downward from the longitudinal outer end of the dust cover 30 . The upper end of the end skirt 52 is fixed to the longitudinal outer end of the reinforcing body 31 . In the state shown in FIG. 10, the lower end portion of the end skirt 52 of this embodiment is formed to extend downward from the exposed portion 11b2 of the lower sliding contact surface 11b1 on the longitudinally outer side of the exposed portion 11b2.

The vertical length of the end skirt 52 is set to such a length that the end skirt 52 positioned on the other side in the XX direction can cover the gap S from the outside in the longitudinal direction in the state shown in FIG. preferably. The skirt member 50 may be composed of the side skirts 51 alone, or may be composed of the end skirts 52 alone.
Since other configurations of the present embodiment are the same as those of the first embodiment, description thereof will be omitted.

As described above, according to the slide bearing 10 of the second embodiment, the same effects as those of the first embodiment are obtained, and the following effects are also obtained. That is, a skirt member 50 that hangs downward from the exposed portion 11b2 of the lower sliding contact surface 11b1 from the marginal dimensions L, W1, and W2 of the dust cover 30 covers the area between the dust cover 30 and the exposed portion 11b2. be able to. As a result, it is possible to prevent foreign matter from entering between the dust cover 30 and the exposed portion 11b2 of the lower sliding contact surface 11b1, thereby further effectively preventing foreign matter from adhering to the exposed portion 11b2. be able to.

[Third Embodiment]
FIG. 13 is a side view showing a slide bearing 10 according to a third embodiment of the invention. The dust cover 30 in the slide bearing 10 of the present embodiment includes a fixed portion 30A having one end portion in the XX direction fixed to the slider 13, and a fixed portion 30A that is vertically attached to the other end portion in the XX direction of the fixed portion 30A. It is different from the first embodiment in that it is divided into a rotating portion 30B that is rotatably connected.
In FIG. 13, the fixed portion 30A includes a flexible cover main body 31A and a reinforcing member 32A that reinforces the cover main body 31A. Similarly, the rotating portion 30B includes a flexible cover body 31B and a reinforcing body 32B that reinforces the cover body 31B.

The reinforcing body 32A and the reinforcing body 32B are obtained by dividing the reinforcing body 32 (see FIG. 7) of the first embodiment into two parts at the middle of the longitudinal direction of the lateral plate portion 34 thereof. Therefore, the reinforcing body 32A has the vertical plate portion 33 and the horizontal plate portion 34A, and the reinforcing body 32B consists of only the horizontal plate portion 34B. In this embodiment, the length of the horizontal plate portion 34B of the reinforcing body 32B in the XX direction is shorter than the length of the horizontal plate portion 34A of the reinforcing body 32A in the same direction, but this is not the only option. not to be

The cover main body 31A and the cover main body 31B are obtained by dividing the cover main body 31 (see FIG. 7) of the first embodiment into two parts in the longitudinal direction corresponding to the division of the reinforcing bodies 32A and 32B. be. In this embodiment, the length of the cover main body 31B in the XX direction is shorter than the length of the cover main body 31A in the same direction, but it is not limited to this.

The reinforcing member 32B of the rotating portion 30B is connected to the reinforcing member 32A of the fixed portion 30A via a hinge 36 so as to be vertically rotatable. The hinge 36 is provided with a restricting member 37 that restricts further upward rotation of the reinforcing body 32B when the reinforcing body 32B is rotated upward to the upper rotating position indicated by the two-dot chain line in FIG. . The restricting member 37 of the present embodiment restricts the upward rotation of the reinforcing body 32B by, for example, contacting the member 36a on the rotating side of the hinge 36. As shown in FIG.

On the other hand, when the reinforcing body 32B is rotated downward to the downward rotation position indicated by the solid line in FIG. Further downward rotation of the reinforcing member 32B is restricted.
As described above, the rotating portion 30B is rotatable between the lower rotating position and the upper rotating position with respect to the fixed portion 30A.

A rotation angle α between the lower rotation position and the upper rotation position of the rotation portion 30B is set to an angle that allows the rotation portion 30B to rotate downward from the upper rotation position by its own weight. For example, in the present embodiment, the member 36a on the rotation side of the hinge 36 is attached to the regulating member 37 at the position (upward rotation position) where the rotation portion 30B is rotated to the maximum angle at which the rotation portion 30B can be rotated downward by its own weight. The shape, mounting position, etc. of the restricting member 37 are set so as to abut.
Since other configurations of the present embodiment are the same as those of the first embodiment, description thereof will be omitted.

Note that the rotating portion 30B may be connected to the fixed portion 30A by a mechanism other than the hinge 36 so as to be vertically rotatable. Further, although the dust cover 30 of the present embodiment is divided into two in the longitudinal direction, it may be divided into three or more divisions, and the adjacent division portions may be rotatably connected at each division point. In addition, although the upward rotation of the rotating portion 30B is restricted by the restricting member 37 in the present embodiment, the restricting member 37 does not need to be provided if the rotation angle α of the rotating portion 30B is small.

As described above, according to the slide bearing 10 of the third embodiment, the same effects as those of the first embodiment are obtained, and the following effects are also obtained. For example, as shown in FIG. 13, when the wall surface 1a exists on one side of the lower structure 1 in the XX direction (the right side in the figure), when the slider 13 slides to the one side, the The rotating portion 30B of the dust cover 30 on one side may come into contact with the wall surface 1a. In this case, as shown in FIG. 14, the rotating portion 30B of the dust cover 30 is rotated upward with respect to the fixed portion 30A by coming into contact with the wall surface 1a. Impact caused by contact can be mitigated. As a result, the dust cover 30 can be prevented from coming into contact with the outside of the wall surface 1a and being damaged.

Further, the rotation angle α between the lower rotation position and the upper rotation position of the rotation portion 30B is set to an angle that allows the rotation portion 30B to rotate from the upper rotation position by its own weight. For example, from the state shown in FIG. 14, when the slider 13 slides to the other side in the XX direction (to the left in the drawing), the rotating portion 30B at the upper rotating position releases contact with the wall surface 1a. As a result, it rotates downward to the lower rotation position by its own weight. Therefore, even if the rotating portion 30B rotates upward from the lower rotating position, the sliding of the slider 13 automatically rotates the rotating portion 30B downward and returns it to the lower rotating position.

[others]
In the above embodiment, the dust cover 30 is fixed to both sides of the slider 13 in the sliding direction (XX direction), but it may be fixed to only one side in the sliding direction. Further, the dust cover 30 covers the entire exposed portion 11b2 of the lower sliding contact surface 11b1, but may cover a portion of the exposed portion 11b2.

The dust cover 30 may be composed only of the cover main body 31 . In this case, the cover body 31 is preferably made of a material that does not cause the protruding portion 31b to hang downward and contact the ground, and more preferably made of a non-flexible material such as metal or hard resin. preferable. Moreover, although the cover main body 31 is in surface contact with the exposed portion 11b2 of the lower sliding contact surface 11b1, it may be arranged with a gap from the exposed portion 11b2. Moreover, the dust cover 30 of the present invention can also be applied to the conventional sliding bearing shown in Patent Document 1.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above-described meaning, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

1 lower structure 2 upper structure 10 slide bearing 11 lower shoe 11b1 lower sliding contact surface 11b2 exposed portion 12 upper shoe 12b1 upper sliding contact surface 13 slider 14a lower sliding surface 15a upper sliding surface 30 dust cover 30A fixed portion 30B rotating portion 31 cover main body 31a lower surface (contact surface)
32 Reinforcing body 34a Lower surface 50 Skirt member L, W1, W2 Allowance dimension α Rotation angle

Claims (6)

a shoe that has a V-shaped concave lower sliding contact surface on the upper surface and is fixed to the upper part of the lower structure of the structure;
an upper shoe having a Λ-shaped concave upper sliding contact surface on the lower surface and fixed to the bottom of the upper structure of the structure;
A slide having a lower sliding surface slidable in one direction with respect to the lower sliding contact surface and an upper sliding surface slidable in the other direction orthogonal to the one direction with respect to the upper sliding contact surface child and
A dust cover provided on the slider and covering at least a part of the exposed portion of the lower sliding contact surface in a state where the lower sliding surface is positioned at the center of the lower sliding contact surface in the one direction. and,
The dust cover includes a flexible cover body and a reinforcing body that reinforces the cover body,
The reinforcing body has a vertical plate portion fixed to the side surface of the slider, and a horizontal plate portion to which the cover body is adhered to the lower surface. sliding bearing. 2. The sliding bearing according to claim 1 , wherein said dust cover has a contact surface that makes surface contact with said at least part of said lower sliding contact surface. 3. The sliding bearing according to claim 1, wherein said dust cover covers the entire exposed portion of said lower sliding contact surface with a margin around it. 4. The slide bearing according to claim 3 , further comprising a skirt member that hangs downward from the exposed portion of the dust cover from the marginal dimension portion. a shoe that has a V-shaped concave lower sliding contact surface on the upper surface and is fixed to the upper part of the lower structure of the structure;
an upper shoe having a Λ-shaped concave upper sliding contact surface on the lower surface and fixed to the bottom of the upper structure of the structure;
A slide having a lower sliding surface slidable in one direction with respect to the lower sliding contact surface and an upper sliding surface slidable in the other direction orthogonal to the one direction with respect to the upper sliding contact surface child and
A dust cover provided on the slider and covering at least a part of the exposed portion of the lower sliding contact surface in a state where the lower sliding surface is positioned at the center of the lower sliding contact surface in the one direction. and
The dust cover has a fixed portion fixed to the slider at one end in the one direction, and a rotating portion connected to the other end of the fixed portion in the one direction so as to be vertically rotatable. have a,sliding bearing. the rotating portion is rotatable between a lower rotating position and an upper rotating position;
A rotation angle between the lower rotation position and the upper rotation position of the rotation portion is set to an angle that allows the rotation portion to rotate downward from the upper rotation position by its own weight. A slide bearing according to claim 5 .

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