JP2018179193A - Sliding bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slip bearing device capable of preventing a decrease of a lubricant for a long period of time and obtaining a high slip action in the event of an earthquake or the like. SOLUTION: A support main body portion arranged between a first structure and a second structure separated in the vertical direction and fixed to the first structure, and the second structure connected to the support main body portion. A sliding support device having a sliding portion that slides in contact with a body, wherein the sliding portions slide in contact with each other with respect to the second structure, are arranged horizontally separated from each other, and are separated from each other. The first sliding member and the second sliding member, which are in contact with the second structure and can be displaced relative to each other in the horizontal direction, are arranged between the first sliding member and the second sliding member, and It has a lubricant holding member that does not come into contact with the second structure. [Selection diagram] Fig. 1

Description

  The present invention relates to a sliding bearing device.

  A sliding bearing device is employed as a seismic isolation means for equipment and structures such as buildings during earthquakes and the like. The sliding bearing device absorbs, for example, horizontal vibrations transmitted to the supporting structure by means of the sliding movement of the two sliding members in sliding contact.

  In the sliding bearing device, a lubricant is conventionally used in order to make the sliding operation between the sliding members more effective. For example, in patent document 1, one side of a sliding member is made to exhibit a favorable sliding action between the other sliding members as a resin-made oil retaining body impregnated with a lubricant. Furthermore, in Patent Document 2 and Patent Document 3, a recess is provided on the sliding surface on one side of the sliding member, the lubricant is held in the recess, and the lubricant is exudeed by the contact pressure between the two sliding members. In, has obtained a stable sliding action.

Japanese Patent Application Publication No. 2007-16905 JP 2001-59544 A JP 2001-65196 A

  However, since all the lubricants described in Patent Documents 1 to 3 are in contact with the sliding surface on the other side, a heavy load of the structure is always received. Then, even if shaking such as an earthquake does not occur, the lubricant exudes due to the contact pressure with the sliding member, and the lubricant decreases after a long period of time, and the sliding action is sufficiently high in the earthquake May not be obtained.

  The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide a sliding bearing device capable of preventing a decrease in lubricant in a long period of time and obtaining a high sliding action at the time of an earthquake or the like. Do.

The sliding bearing device of the present invention is disposed between a first structure and a second structure which are separated in the vertical direction, and is connected to the bearing main body portion fixed to the first structure and the bearing main body portion A sliding bearing device, comprising: a sliding part in sliding contact with the second structure, wherein the sliding parts are respectively in sliding contact with the second structure and arranged horizontally separated from one another Between the first sliding member and the second sliding member, the first sliding member and the second sliding member being horizontally displaceable relative to each other in contact with the second structure, and And a lubricant holding member disposed and not in contact with the second structure.
According to the sliding bearing device of the present invention, it is possible to prevent the reduction of lubricant in the long term, and to obtain a high sliding action at the time of an earthquake or the like.

In the sliding bearing device of the present invention, the second structure includes a sliding member, and the sliding portion is in sliding contact with the sliding member.
According to this configuration, a sufficient sliding action can be generated.

In the sliding bearing device of the present invention, the second sliding member is disposed so as to surround the outer periphery of the first sliding member in plan view.
According to this configuration, the lubricant can be effectively exuded while realizing a high supporting function of the structure.

In the sliding bearing device of the present invention, the plurality of second sliding members are annularly arranged apart from one another so as to surround the outer periphery of the first sliding member in plan view.
According to this configuration, the amount of lubricant exudation can be adjusted by the shape of the second sliding member.

In the sliding bearing device of the present invention, the second sliding member is held by the bearing body in a non-relatively displaceable manner relative to the bearing body.
According to this configuration, the movement of the second sliding member can be limited to the range required to generate the sliding action.

In the sliding bearing device of the present invention, the first sliding member and the second sliding member are spaced apart in the circumferential direction of the bearing main body in plan view.
According to this configuration, it is possible to make the sliding part a freer shape, and it is possible to adjust the amount of lubricant leakage.

  According to the present invention, it is possible to provide a sliding bearing device capable of preventing the reduction of lubricant in a long term and obtaining high sliding action at the time of an earthquake or the like.

FIG. 1 is a vertical sectional view showing an embodiment of the sliding bearing device of the present invention. FIG. 2 is a cross-sectional view taken along line I-I of FIG. It is a vertical direction partial cross section figure for demonstrating the effect | action of the sliding bearing apparatus of FIG. 1, (a) is a figure for showing the state of the sliding part at the time of horizontal direction vibration non-generation, (b) And (c) is a figure which shows the effect | action of a sliding part at the time of horizontal direction vibration generation. FIG. 7 is a cross-sectional view similar to the cross section taken along line I-I of FIG. 1, showing another example of the sliding bearing device in the sliding bearing device of FIG. 1. FIG. 6 is a vertical cross-sectional view showing another embodiment of the sliding bearing device of the present invention. It is the II-II sectional view taken on the line of FIG.

  In the following, an embodiment of the sliding bearing device according to the invention will be illustrated and described with reference to the drawings.

  First, a sliding bearing device according to an embodiment (embodiment 1) of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a vertical direction sectional view showing an embodiment of a sliding bearing device of the present invention, and FIG. 2 is a sectional view taken along line II of FIG.

As shown in FIG. 1, the sliding bearing device 1 is disposed between the first structure 2 and the second structure 3 which are separated in the vertical direction, and a bearing main body 4 fixed to the first structure 2; It has a slide 5 connected to the bearing body 4 and in sliding contact with the second structure 3.
Here, the vertical direction refers to the vertical direction in the drawing of FIG. 1, and the sliding contact means that it is possible to slide between the surfaces in contact with each other.

  The first structure 2 is, for example, a high-rise structure such as a high-rise building or a low-rise structure such as a single-family house. In addition, not only a building but an apparatus etc. may be sufficient.

As shown in FIG. 1, the second structure 3 includes a slidable member 3 a and a structure body 3 b. The sliding portion 5 is in sliding contact with the sliding member 3a.
The slippery member 3a is, for example, a member having a flat surface in contact with the sliding bearing device 1, which is made of, for example, a stainless steel plate, a steel plate plated with hard metal such as chromium, a steel plate coated with a fluorine resin. Moreover, although the thickness of the slidable member 3 a is arbitrary, the surface area must be larger than the contact area with the sliding bearing device 1 in order to exert the sliding action. The structure body 3b is, for example, a building foundation or a ground.
In addition, although the to-be-slided member 3a is a shape installed on the structure main body 3b in FIG. 1, it can also be embedded and integrated in the structure main body 3b.

  In FIG. 1, the first structure 2 is located at the upper part in the vertical direction, and the second structure 3 is located at the lower part in the vertical direction. However, all of the sliding bearing 1, the first structure 2 and the second structure 3 are Also, it can be used in the direction opposite to the example of the figure in the vertical direction. In that case, for example, a building foundation or a ground is disposed on the first structural body 2 side, and, for example, a building or equipment is disposed on the second structural body 3 side.

  In the present embodiment, the support main body 4 includes an upper surface plate 4a, a rubber plate 4b, a steel plate 4c, a covering rubber 4d, a connecting steel plate 4e, a connecting member 4f, and a holding member 4g. The bearing main body 4 is fixed to the first structure 2 via the top plate 4a as shown in FIG. In the support main body 4, the rubber plates 4b and the steel plates 4c are alternately stacked, the outer peripheral surface is covered with the covering rubber 4d, and the holding members 4g are connected via the connecting steel plates 4e and the connecting members 4f. . The upper surface plate 4a is a rigid member such as a steel plate, for example. Further, the connecting member 4 f is disposed between the connecting steel plate 4 f and the holding member 4 g to make the connection between the respective members stronger. Furthermore, in the present embodiment, the holding member 4g has a shape protruding toward the sliding portion 5 along the circumference, and can be, for example, a rigid member such as a steel plate.

  In the present embodiment, as shown in FIG. 1, the sliding portion 5 is composed of a first sliding member 6, a second sliding member 7 and a lubricant holding member 8. The sliding portion 5 is disposed vertically intermediate the bearing main body 4 and the second structure 3, and is connected to the bearing main body 4 via the holding member 4 g of the bearing main body 4. In FIG. 1, the first sliding member 6 and the second sliding member 7 are respectively in sliding contact with the second structure 3, horizontally spaced from each other, and in contact with the second structure 3. In the state, relative displacement is possible mutually horizontally. Note that, in the present embodiment, being capable of relative displacement in the horizontal direction means an operation in which the first sliding member 6 and the second sliding member 7 approach and separate from each other.

  Further, as shown in FIG. 2, in the present embodiment, the first sliding member 6 has a circular cross-sectional shape in the horizontal direction (the left and right direction in FIG. 1), and the second sliding member 7 has a first shape in plan view. The annular member is disposed to surround the outer periphery of the sliding member 6. In FIG. 2, the second structure 3 is not shown. In the same plan view, the protruding portion of the holding member 4g is in contact with the outer periphery of the second sliding member 7, and the second sliding member 7 is not displaced relative to the supporting body 4 in the horizontal direction by the holding member 4g. It is possibly held by the bearing body 4. According to this configuration, when vibration is generated, the movement of the second sliding member 7 can be limited to the range necessary for generating the sliding action.

  Further, in the present embodiment, the first sliding member 6 is in sliding contact with both the holding member 4g and the slidable member 3a of the second structure 3 at the contact surface in the vertical direction. Furthermore, although the second sliding member 7 is in sliding contact with the sliding member 3a of the second structure 3 on the contact surface in the vertical direction, the second sliding member 7 is in contact with the holding member 4g in the vertical and horizontal contact surfaces. For example, it is fixed by an adhesive or a bolt. In the present embodiment, even if the second sliding member 7 is not fixed to the holding member 4g, the second sliding member 7 is held so as not to be displaceable relative to the bearing main body 4 in the horizontal direction.

  The first sliding member 6 and the second sliding member 7 are made of, for example, a stainless steel plate, a steel plate plated with hard metal such as chromium, a steel plate coated with a fluorine resin, etc. Member can be used.

In addition, the sliding portion 5 includes a lubricant holding member 8 which is disposed between the first sliding member 6 and the second sliding member 7 and which is not in contact with the second structure 3, which are horizontally separated.
In the present embodiment, the lubricant holding member 8 is fixed at a contact surface (upper surface in this example) with the holding member 4g, and is disposed between the first sliding member 6 and the second sliding member 7. The first sliding member 6 and the second sliding member 7 are not fixed. However, the lubricant holding member 8 may be fixed to the first sliding member 6 and the second sliding member 7 as long as the lubricant holding member 8 is crushed and an lubricant comes out at the time of an earthquake or the like. There may be a minute gap between at least one of the sixth slide member 7 and the second slide member 7 so as not to be in contact.

Furthermore, the lubricant holding member 8 is not in contact with the second structure 3, and in FIG. 1, a space s is formed between the lubricant holding member 8 and the slidable member 3 a of the second structure 3.
Here, the lubricant holding member 8 is a member capable of maintaining the air gap s, and for example, a member in which a lubricant such as lubricating oil is impregnated in a porous body such as a sponge, or a solid which can be deformed by a compression force. It can be a lubricant.

Hereinafter, the operation of the sliding bearing device 1 at the time of occurrence of vibration upon earthquake or the like will be described with reference to FIGS.
3 (a) to 3 (c) are partial vertical cross-sectional views for explaining the operation of the sliding bearing device of FIG. 1, and FIG. 3 (a) is a sliding portion at the time of no horizontal vibration. FIGS. 3 (b) and 3 (c) are diagrams showing the action of the sliding portion when horizontal vibration occurs. As shown in FIG. 2, in the present embodiment, the second sliding member 7 and the lubricant holding member 8 are annularly continuous members in plan view, but for convenience of explanation, FIGS. As shown in), one side in the vertical direction cross section is referred to as a second sliding member 7a and a lubricant holding member 8a, and the other side is referred to as a second sliding member 7b and a lubricant holding member 8b. The portion above the holding member 4g is not shown.

  Under circumstances where vibration due to earthquake or the like is not generated, the sliding bearing device 1 supports the structural body positioned on the upper side in the vertical direction of the first structural body 2 and the second structural body 3. As shown in FIG. 3A, the lubricant holding members 8a and 8b are disposed between the first sliding member 6 and the second sliding members 7a and 7b. Here, the lubricant holding members 8a and 8b do not receive pressure from the horizontal direction.

  When vibration occurs, the first sliding member 6 in sliding contact with the holding member 4g and the slidable member 3a is horizontally displaced in a cycle different from that of the second sliding members 7a and 7b due to swaying. 2) It will be displaced relative to the sliding members 7a and 7b. In the example shown in FIG. 3 (b), the first sliding member 6 is displaced in the direction of the arrow a1, and the distance between the first sliding member 6 and the second sliding member 7a on one side becomes narrow. The lubricant holding member 8 a between the sliding member 7 a and the sliding member 7 a is compressed and deformed so that the lubricant exudes and adheres to the second structure 3. Thus, as a result of the lubricant adhering to the second structure 3 at the time of occurrence of vibration, the sliding action is promoted on the contact surface between the sliding portion 5 and the second structure 3 and the generated seismic force etc. is absorbed, which is high Seismic isolation effect is realized.

  Further, as shown in FIG. 3C, when the first sliding member 6 is displaced in the direction of the arrow a2, the lubricant holding member 8a is released from the compressed state, and the bleeding of the lubricant is stopped. On the other hand, since the lubricant holding member 8b is compressed this time and the lubricant exudes to the second structure 3 side, the sliding action is promoted on the contact surface between the sliding member 5 and the second structure 3. Thus, the lubricant holding member 8a or 8b is compressed in accordance with the period and direction of vibration due to an earthquake or the like, and the lubricant is widely spread on the contact surface between the sliding member 5 and the second structure 3 You can get it around. Further, the above-mentioned action is only at the time of occurrence of vibration, and when the occurrence of vibration is not caused, the lubricant does not exude, and the reduction of the lubricant can be prevented for a long time.

As shown in FIG. 2, in the present embodiment, as described above, the second sliding member 7 is disposed so as to surround the outer periphery of the first sliding member 6 in plan view.
According to this configuration, the lubricant can be effectively exuded while realizing a high supporting function of the structure.

The first sliding member 6 and the second sliding member 7 may be made of the same material, but different materials may be used. In the case of using different members, the first sliding member 6 and the second sliding member 7 can be further reliably made by using members having different friction coefficients with respect to the sliding member 3a. And can be displaced relative to each other.
Also, in the present embodiment, the first sliding member 6 is moved, and the second sliding member 7 is held by the holding member 4g, but both the first sliding member 6 and the second sliding member 7 are moved. You can also. In that case, the coefficient of friction with the slidable member 3a may be made different.

  4 is a cross-sectional view similar to the cross section taken along line I-I of FIG. 1, showing another example of the sliding bearing device in the sliding bearing device of FIG. As shown in FIG. 4, the plurality of second sliding members 7 are arrayed in a ring shape so as to be separated from each other so as to surround the outer periphery of the first sliding member 6 in a plan view. In the present embodiment, the first sliding member 6 has a circular cross-sectional shape, and a plurality of second sliding members 7 are arrayed in an annular shape at intervals on the outer peripheral side. As shown in FIG. 1, the holding member 4 g has a shape that protrudes toward the sliding portion 5 along the circumference. In this example, a recess is formed along the circumference of the protruding portion. In FIG. 4, the second sliding member 7 is fitted in the recess formed in the holding member 4 g, so that the second sliding member 7 can not be displaced relative to the bearing main body 4 in the horizontal direction. It is held at 4. According to this configuration, when vibration is generated, the movement of the second sliding member 7 can be limited to the range necessary for generating the sliding action.

The first sliding member 6 is in sliding contact with both the holding member 4g and the sliding member 3a of the second structure 3 at the contact surface in the vertical direction. Furthermore, although the second sliding member 7 is in sliding contact with the sliding member 3a of the second structure 3 on the contact surface in the vertical direction, the second sliding member 7 is in contact with the holding member 4g in the vertical and horizontal contact surfaces. For example, it is fixed by an adhesive or a bolt. In the present embodiment, even if the second sliding member 7 is not fixed to the holding member 4g, the second sliding member 7 is held so as not to be displaceable relative to the bearing main body 4 in the horizontal direction.
In the above configuration, the amount of lubricant exuded can be adjusted by changing the shape of the second sliding member 7.

  Next, a sliding bearing device according to another embodiment (embodiment 2) of the present invention will be described with reference to FIGS. 5 and 6. The second embodiment is the same as the first embodiment except that the configuration of the sliding portion 5 is different from the first embodiment. Hereinafter, the sliding portion in the second embodiment will be described focusing on differences from the first embodiment.

FIG. 5 is a vertical sectional view showing another embodiment of the sliding bearing device of the present invention. Also in the present embodiment, as in the first embodiment, the sliding portion 5 has the first sliding member 60 and the second sliding member 70 via the holding member 4g of the support main body 4, and the second structure of the support main body 4 and the second structure. It has a structure disposed between it and the body 3. 6 is a cross-sectional view taken along line II-II of FIG. In addition, in FIG. 6, the 2nd structure 3 is abbreviate | omitting illustration. In the first embodiment, the second slide member is disposed so as to surround the outer periphery of the first slide member in a plan view, or the plurality of second slide members 7 are a first slide member in a plan view In this embodiment, the first sliding member 60 and the second sliding member 70 are arranged in a plan view, as shown in FIG. It is spaced apart in the circumferential direction of the bearing body 4. Moreover, in the example shown in FIG. 6, the 1st sliding member 60 and the 2nd sliding member 70 are arrange | positioned by turns. More specifically, the first sliding member 60 and the second sliding member 70 have a shape obtained by cutting a circle from the center to the circumferential side and dividing it into eight equal parts, and the circumference of the holding member 4g of the bearing main body 4 Are arranged alternately along the.
Referring again to FIG. 5, in the present embodiment, the first sliding member 60 and the second sliding member 70 make sliding contact with the holding member 4g and the sliding member 3a of the second structure 3 at the vertical contact surfaces. ing. Further, although the lubricant holding member 80 is disposed at least at the boundary between the first slide member 60 and the second slide member 70, the first slide member 60 and the second slide member 70, and the lubricant holding member 80 The contact surface of is not fixed. In addition, the lubricant holding member 80 is fixed to the holding member 4g at the contact surface, and a gap s is formed between the lubricant holding member 80 and the slidable member 3a of the second structure 3. However, the lubricant holding member 80 may be fixed to the first sliding member 60 and the second sliding member 70 as long as the lubricant holding member 80 is crushed and an lubricant is released at the time of an earthquake or the like. It may not be in contact with at least one of the 60 and the second sliding member 70 with a minute gap.

  According to the shapes of the first sliding member 60 and the second sliding member 70 in the present embodiment, the sliding portion 5 can be made more flexible, and the amount of lubricant leakage can be adjusted.

  Also in the present embodiment, the first sliding member 60 and the second sliding member 70 can be different members, and for example, they can be made more reliable by using members having different friction coefficients with respect to the sliding member 3a. The first slide member 6 and the second slide member 7 can be displaced relative to each other. Moreover, the slide part 5 may have not only the 1st slide member 60 and the 2nd slide member 70 but also another slide member. That is, it may have three or more types of slide members that can be displaced relative to each other in the horizontal direction.

  In the present embodiment, the holding member 4g of the support main body 4 has a shape in which the holding member 4g protrudes toward the sliding portion 5 along the circumference, and the first sliding member 60 and the second The sliding member 70 is prevented from sliding outward in the horizontal direction of the circumference of the bearing body 4.

  1: Sliding bearing, 2: First structure, 3: Second structure, 3a: Slipped member, 3b: Structure body, 4: Bearing body, 4a: Top plate, 4b: Rubber plate, 4c: Steel plate, 4d: Coated rubber, 4e: Coupling steel plate, 4f: Coupling member, 4g: Holding member, 5: Sliding member, 6, 60: First sliding member, 7, 70: Second sliding member, 8, 80: Lubrication Agent holding member

Claims (6)

Disposed between a first structure and a second structure spaced apart in the vertical direction,
A sliding bearing device comprising: a bearing body fixed to said first structure; and a slide coupled to said bearing body and in sliding contact with said second structure,
The sliding portion is
A first sliding member, which is in sliding contact with the second structure, is horizontally separated from each other, and is capable of relative displacement in the horizontal direction in contact with the second structure, and A second sliding member,
A lubricant holding member disposed between the first sliding member and the second sliding member and not in contact with the second structure;
Sliding bearing device. The second structure includes a slidable member, and the sliding portion is in sliding contact with the slidable member.
A sliding bearing device according to claim 1. The second sliding member is disposed so as to surround an outer periphery of the first sliding member in a plan view.
A sliding bearing device according to claim 1 or 2. The plurality of second sliding members are annularly arranged apart from one another so as to surround the outer periphery of the first sliding member in plan view.
A sliding bearing device according to claim 1 or 2. The second sliding member is held by the bearing main body so as not to be horizontally displaceable relative to the bearing main body.
A sliding bearing device according to claim 3 or 4.   The sliding bearing device according to claim 1, wherein the first sliding member and the second sliding member are spaced apart in a circumferential direction of the bearing main body in a plan view.

Images