JP2021105321A - Sliding bearing - Google Patents

Abstract

To provide a sliding bearing which makes it possible to easily determine whether or not it is available in the actual state.SOLUTION: In a sliding bearing 1 that is arranged between a bridge girder 10 in a bridge B and a bridge pier 11 or a bridge abutment and has a body part 1a and a sliding member 1b, a residual quantity confirmation part (a gap S) for confirming the thickness of the sliding member is formed on a side surface of the sliding member of the sliding bearing. This enables the residual quantity confirmation part to be confirmed from the side surface of the sliding member, thereby easily determining whether or not the sliding bearing is available in the actual state.SELECTED DRAWING: Figure 1

Description

The present invention relates to sliding bearings.

Conventionally, a sliding bearing having a sliding member, which is arranged between a bridge girder and a pier in a bridge, is known. As the bridge girder slides on the sliding member, it absorbs the relative displacement (positional displacement) between the bridge girder and the pier due to changes in temperature. Since the sliding member gradually wears after many years of use, it is necessary to judge whether or not the sliding member can be used.

Patent Document 1 discloses a technique for estimating the thickness of a sliding member 51 in a sliding bearing 50 arranged between a bridge girder 101 and a pier 100. Specifically, proximity sensors 16 to 19 are attached to the sliding bearing 50, and detection objects 56 to 59 are attached on the bridge girder 101. The thickness of the sliding member 51 is estimated based on the distances from the detection objects 56 to 59 detected by the proximity sensors 16 to 19. Thereby, based on the estimated thickness of the sliding member 51, whether or not the sliding bearing 50 can be used is determined in the present state, that is, without removing the sliding bearing 50 from between the bridge girder 101 and the pier 100. can.

JP-A-2017-8616

However, since the detection objects 56 to 59 are mounted on the bridge girder 101, if a railroad track is installed on the bridge girder 101 or a road is installed, the detection objects 56 to 59 are mounted on the railroad track or on the road. Need to be installed. In order to install the objects to be detected 56 to 59 on the railroad track, it is necessary to work at night after the end of the railroad operation. Further, in order to install the detection objects 56 to 59 on the road, the road must be closed at least partially. Therefore, it is not easy to estimate the thickness of the sliding member 51.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sliding bearing that can easily determine whether or not it can be used in the present state.

In order to achieve this object, the sliding bearing of the present invention is arranged between the bridge girder and the pier or abutment in the bridge, and the main body portion and the contact portion side of the main body portion with the bridge girder or the pier or the abutment. A sliding member provided in the above is provided, and a remaining amount checking portion for confirming the thickness of the sliding member is formed on the side surface of the sliding member.

According to the sliding bearing according to claim 1, a remaining amount checking portion for checking the thickness of the sliding member is formed on the side surface of the sliding member of the sliding bearing. As a result, by checking the remaining amount checking portion from the side surface of the sliding member, it is possible to easily determine whether or not the sliding bearing can be used in the present state. The remaining amount checking portion is not limited to the one formed above and below the side surface of the sliding member, and may be formed on a part of the side surface of the sliding member. For example, it may be formed from the lower end of the side surface of the sliding member to the middle of the upper part, from the upper end of the side surface of the sliding member to the middle of the lower part, or from the middle of the lower part to the middle of the upper part of the side surface of the sliding member. May be formed up to.

According to the sliding bearing according to claim 2, the remaining amount checking portion is configured to have a gap formed on the side of the sliding member by forming the side surface of the sliding member inside the side surface of the main body portion. As a result, in addition to the effect of claim 1, the following effect is produced. When a feeler gauge or the like is inserted into the gap, it can be judged that the slip bearing can be used if the feeler gauge or the like can be inserted. On the other hand, if the feeler gauge or the like cannot be inserted into the gap, the slip bearing or the like can be used. There is an effect that it can be judged that the replacement time has come.

According to the sliding bearing according to claim 3, since the side cross-sectional view of the gap is formed in a substantially rectangular shape, the upper end and the lower end of the gap are formed in a substantially flat shape, whereby the second aspect plays. In addition to the effect, the gap has a substantially uniform height in the depth direction, and there is an effect that the height of the substantially rectangular gap can be set as the limit of wear of the sliding member.

According to the sliding bearing according to the fourth aspect, the remaining amount checking portion is formed by making the color of the side surface of the sliding member different from the color of the side surface of the main body portion, whereby the effect of claims 1 to 3 is exhibited. In addition, if the color difference between the side surface of the sliding member and the side surface of the main body can be seen, it can be judged that the sliding bearing can be used, while if the color difference cannot be seen, it is time to replace the sliding bearing. It has the effect of being able to judge that it has been done.

According to the sliding bearing according to claim 5, the remaining amount checking portion is formed by notating the boundary between the side surface of the sliding member and the side surface of the main body portion as a line, whereby claims 1 to 4 play. In addition to the effect, if the line is visible, it can be judged that the sliding bearing can be used, while if the line is not visible, it can be judged that the time to replace the sliding bearing has arrived.

According to the sliding bearing according to claim 6, since the remaining amount checking portion is formed on the entire circumference on the side surface of the sliding member, the remaining amount checking portion can be confirmed from any position on the side surface of the sliding member. It is possible to determine whether or not the sliding bearing can be used, and this has the effect of improving the workability of the work in addition to the effect of any one of claims 1 to 5.

(A) is a side view of a portion of the bridge where a sliding bearing is provided, and (b) is an enlarged view of the Ib portion of (a). (A) is a top view of a sliding bearing, and (b) is a cross-sectional view taken along the line IIb-IIb of (a). (A) is a cross-sectional view of a sliding bearing in a modified example in which the lower end to the middle of the upper part of the side surface of the sliding member is formed inside the main body portion, and (b) is a cross-sectional view of the sliding bearing in another modified example. It is sectional drawing of the sliding bearing when the side surface of a sliding member and a part of the side surface of a main body part are formed inward, and (c) is formed in the upper part of the side surface of the sliding member in still another modification. It is a cross-sectional view of the slip bearing in the case of. (A) is a side view when the paint is applied to the side surface of the sliding member in the modified example, and (b) is a side view when drawn on the lower end of the side surface of the sliding member in another modified example. be. It is sectional drawing of the sliding bearing in the modified example when the sliding member is provided in the lower part of the sliding bearing.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1A is a side view of a portion of the bridge B where the sliding bearing 1 is provided, and FIG. 1B is an enlarged view of the Ib portion of FIG. 1A. The bridge B is a structure that is erected in a river, a valley, or the like and connects traffic routes such as a railroad or a road. The bridge B is configured by supporting a bridge girder 10 forming a traffic route with a pier 11 erected from a river, a valley, or the like.

The slip bearing 1 is provided between the bridge girder 10 and the pier 11, and is a member that absorbs the relative displacement (positional deviation) of the bridge girder 10 and the pier 11 due to a temperature change or the like. Specifically, the slip bearing 1 is arranged between the lower surface of the upper shoe 2 arranged on the lower surface of the bridge girder 10 and the upper surface of the lower shoe 3 arranged on the upper surface of the pier 11. The shapes of the lower surface of the upper shoe 2 and the upper surface of the lower shoe 3 are formed in accordance with the shapes of the upper surface and the lower surface of the sliding bearing 1 described later. Specifically, the lower surface of the upper shoe 2 is formed flat and the lower surface is formed. The upper surface of the shoe 3 is formed in a concave hemisphere.

As shown in FIG. 1B, the sliding bearing 1 is composed of a main body portion 1a and a sliding member 1b formed on the upper portion of the main body portion 1a. The sliding member 1b absorbs the relative displacement between the sliding member 1b and the upper sill 2, that is, the relative displacement between the bridge girder 10 and the pier 11 by sliding the lower surface of the upper sill 2 in contact with the upper surface thereof. It is a member to be used.

The side surface of the sliding member 1b is formed inside the side surface of the main body portion 1a. As a result, when the sliding bearing 1 is arranged between the upper shoe 2 and the lower shoe 3, a gap S is formed by the lower surface of the upper shoe 2, the side surface of the sliding member 1b, and the upper end surface 1a1 of the main body 1a. Will be done.

Here, the structure and shape of the sliding bearing 1 will be described with reference to FIG. FIG. 2A is a top view of the sliding bearing 1, and FIG. 2B is a cross-sectional view taken along the line IIb-IIb of FIG. 2A. As shown in FIG. 2, the upper portion of the sliding bearing 1 is formed in a substantially columnar shape, and the lower portion is formed in a hemispherical shape continuous with the upper portion. The upper surface of the sliding bearing 1 is formed flat.

A sliding member 1b is formed on the upper part of the sliding bearing 1, that is, at the contact portion with the upper shoe 2 in FIG. Specifically, a plurality of holes are formed on the upper surface of the sliding bearing 1, and each hole is filled with the solid lubricant 1b1. The height H of the solid lubricant 1b1 is exemplified by 1 mm. That is, in the sliding bearing 1, the height H of the solid lubricant 1b1 is defined as the thickness of the sliding member 1b.

The side surface of the sliding member 1b is formed inside the side surface of the main body portion 1a over the entire circumference (that is, the outer circumference) thereof. Further, the shape of the side surface of the sliding member 1b is formed to be substantially vertical. Further, the upper end surface 1a1 is formed so as to connect the lower end on the side surface of the sliding member 1b and the upper end on the side surface of the main body portion 1a substantially horizontally. The width W in the horizontal direction on the upper end surface 1a1 is also exemplified by 1 mm.

By forming the side surface and the upper end surface 1a1 of the sliding member 1b of the sliding bearing 1 in this way, the sliding bearing 1 is arranged between the upper sill 2 and the lower sill 3 as shown in FIG. 1 (b). In this case, a gap S having a substantially rectangular side cross section is formed over the entire circumference and top and bottom of the side surface of the sliding member 1b. If a feeler gauge having the same thickness as the lower limit thickness (for example, 0.01 mm) of the slip member 1b that can be used can be inserted into the gap S, the thickness of the slip member 1b has not reached the lower limit. It can be judged that the slip bearing 1 can be used. On the other hand, if the feeler gauge for the gap S cannot be inserted, the thickness of the sliding member 1b has reached the lower limit, and it can be determined that the time for replacing the sliding bearing 1 has arrived. Thereby, whether or not the slip bearing 1 can be used can be easily and accurately determined in the present state, that is, without removing the slip bearing 1 from between the bridge girder 10 and the pier 11.

In addition, since the gap S is formed on the entire circumference of the side surface of the sliding member 1b, it is determined whether or not the sliding bearing 1 can be used by inserting the feeler gauge from any position on the side surface of the sliding member 1b. can. Therefore, the workability for such work can be improved. Further, since the gap S is formed in a substantially rectangular shape in cross-sectional view on the side thereof, the upper end and the lower end of the gap S are formed in a substantially flat shape. As a result, the gap S has a substantially uniform height in the depth direction, and the height of the substantially rectangular gap S can be set as the wear limit of the sliding member 1b.

Further, by visually confirming the existence of the gap S, it is possible to easily determine whether or not the slip bearing 1 can be used in the present state. Specifically, when the vicinity of the upper part of the side surface of the sliding bearing 1 is irradiated with light with a flashlight or the like and the gap S can be seen, it can be determined that the sliding bearing 1 can be used, while the gap S cannot be seen. Can be determined that the replacement time for the slip bearing 1 has arrived.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and it is easy that various improvements and changes can be made without departing from the spirit of the present invention. It can be inferred from.

In the above embodiment, a gap S is formed above and below the side surface of the sliding member 1b. However, the gap S is not necessarily limited to the one formed above and below the side surface of the sliding member 1b, and for example, as in the sliding bearing 21 of FIG. 3A, the lower end on the side surface of the sliding member 1b. The gap S1 may be formed from the lower end to the middle of the upper part on the inner side of the main body 1a and from the lower end to the middle of the upper part on the side surface of the sliding member 1b. Further, the gap S1 may be formed from the middle of the lower part of the side surface of the sliding member 1b to the middle of the upper part.

Further, as shown in the sliding bearing 31 of FIG. 3B, the side surface of the sliding member 1b and a part of the side surface of the main body portion 1a may be formed inside. In this case, it is preferable that the height of the lower end of the sliding member 1b and the upper end surface 1a1 of the main body 1a is formed to be slightly thinner than the thickness of the feeler gauge inserted into the gap S. By forming in this way, when the sliding member 1b, that is, the solid lubricant 1b1, is completely worn out, the gap gauge cannot be inserted into the gap S, and it is determined that the time for replacing the sliding bearing 31 has arrived. 31 can be used without waste.

Further, as in the sliding bearing 41 of FIG. 3C, only the upper portion of the side surface of the sliding member 1b may be formed inside. By forming in this way, the feeler gauge cannot be inserted into the gap S, and even when it is determined that the time for replacing the slip bearing 41 has arrived, the solid lubricant 1b1 is not completely worn. Therefore, even if it takes time from such a determination to the replacement work of the sliding bearing 41, the sliding member 1b and the upper shoe 2 can be slid as long as the solid lubricant 1b1 remains.

Further, instead of forming the gap S, the boundary between the sliding member 1b and the main body portion 1a may be clearly indicated on the side surface of the sliding bearing 1. For example, as shown in the sliding bearing 51 of FIG. 4A, by applying the paint C to the side surface of the sliding member 1b, the color of the side surface of the sliding member 1b and the color of the side surface of the main body 1a may be made different. It is good, and by drawing a line L at the lower end of the side surface of the sliding member 1b as shown in the sliding bearing 61 of FIG. 4B, the boundary between the side surface of the sliding member 1b and the side surface of the main body 1a is described as a line. You may.

By visually observing the paint C of the sliding bearing 51 and the line L of the sliding bearing 61, it can be easily determined whether or not the sliding member 1b can be used in the present state. In this case, the paint C and the line L of the slide bearing 51 are made to be the opposite color (complementary color) of the color of the main body 1a, the fluorescent color, or the like so that the paint C and the line L can be seen more clearly. be able to. Further, the gap S, the paint C, and the wire L may be appropriately combined and provided for the sliding bearing of 1.

In the above embodiment, the sliding member 1b is formed on the upper part of the sliding bearing 1. However, the present invention is not limited to this, and for example, as in the sliding bearing 71 of FIG. 5, by filling the lower surface of the sliding bearing 71 with the solid lubricant 1e1, the sliding member 1e can also be applied to the lower surface of the sliding bearing 71. Can be formed. In this case as well, the side surface of the lower sliding member 1e may be formed inside the main body 1a. As a result, when the sliding bearing 71 is arranged between the upper sill 2 and the lower sill 3, a gap is formed between the upper surface of the lower sill 3 and the lower surface of the sliding member 1e. By inserting it, it can be determined whether or not the sliding member 1e (solid lubricant 1e1) can be used.

Further, the method is not limited to the one in which the sliding member 1b and the lower sliding member 1e are provided together as in the sliding bearing 71, and only the sliding member 1e may be provided.

In the above embodiment, the gap S is formed on the entire circumference of the side surface of the sliding member 1b. However, the present invention is not limited to this, and the gap S may be formed on a part of the side surface of the sliding member 1b.

In the above embodiment, the side surface of the sliding member 1b is formed substantially vertically, and the upper end surface 1a1 is formed substantially horizontally. However, the present invention is not limited to this, and the side surface of the sliding member 1b may be formed in an inclined shape or a curved shape. Further, the upper end surface 1a1 and the side surface of the sliding member 1b may be formed in a continuous curved shape, a stepped shape, or the like.

In the above embodiment, a feeler gauge is inserted into the gap S to determine whether or not the slip bearing 1 can be used. However, what determines whether or not the sliding bearing 1 can be used is not necessarily limited to the feeler gauge, and may be a plate-shaped member other than the feeler gauge, or a rod-shaped member.

In the above embodiment, the slip bearing 1 is arranged between the bridge girder 10 and the pier 11 of the bridge B. However, the sliding bearing 1 is not limited to the space between the bridge girder 10 and the pier 11 in the bridge B, and may be arranged, for example, between the bridge girder 10 and the abutment. Further, the sliding bearing 1 is not limited to the bridge B, and may be arranged between structures other than the bridge B, or may be applied to a seismic isolation device of a building or the like. You may.

1,21,31,41,51,61,71 Slip bearing 1a Main body 1b Slip member S, S1 Gap (remaining amount check part)
C paint (remaining amount check part)
L line (remaining amount check part)
B Bridge 10 Bridge girder 11 Pier

Claims (6)

In a sliding bearing which is arranged between a bridge girder and a pier or an abutment in a bridge and includes a main body and a sliding member provided on the main body portion on the side of the bridge girder or the pier or abutment with the abutment.
A sliding bearing characterized in that a remaining amount checking portion for checking the thickness of the sliding member is formed on the side surface of the sliding member. The remaining amount checking portion is characterized in that the side surface of the sliding member is formed inside the side surface of the main body portion so as to have a gap formed on the side of the sliding member. Sliding bearing according to claim 1. The sliding bearing according to claim 2, wherein the gap is formed in a substantially rectangular shape in cross-sectional view on the side thereof. The sliding bearing according to any one of claims 1 to 3, wherein the remaining amount checking portion is formed by making the color of the side surface of the sliding member different from the color of the side surface of the main body portion. The sliding bearing according to any one of claims 1 to 4, wherein the remaining amount checking unit is formed by describing the boundary between the side surface of the sliding member and the side surface of the main body portion as a line. The sliding bearing according to any one of claims 1 to 5, wherein the remaining amount checking unit is formed on the entire circumference of the side surface of the sliding member.

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