JP2006105291A - Elastic bearing body, bolt joining method and damper structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing body free from generation of creeping and relaxation for a long period with high stress intensity. <P>SOLUTION: This elastic bearing body 1 is composed of a storage body 3 formed into the curved surface shape and having a pressure receiving body 2 made of rubber or resin inside, and compression force is acted on at least a pressure receiving surface 2a of the pressure receiving body 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to, for example, an elastic bearing body, a bolt joining method using the elastic bearing body, and a damper structure to which the elastic bearing body is applied.

2. Description of the Related Art Conventionally, for example, in a vibration damping structure of a bridge or a seismic isolation device for a building structure, an elastic member using a disc spring 37 or the like is used as shown in FIG. 20 to absorb energy. (See Patent Documents 1 and 2). In addition, in order to maintain prestress at bolt fastening parts in building structures, mechanical structures, vehicle structures, etc., and to elastically support heavy structures such as vehicles and buildings, the above-mentioned disc springs, spring washers and spring washers Etc. are known to be used.
Japanese Patent Laid-Open No. 2004-197502 JP 2004-11318 A

  However, long-term creep and relaxation become a problem with conventional elastic bearings. Further, in the friction bonding structure using high tension bolts, if contact between members is contact between different materials, there is a possibility that rust is generated on the contact surface due to an electrolytic corrosion effect accompanying a difference in ionization tendency. Due to the occurrence of rust, there is a problem that the coefficient of friction changes and the desired frictional resistance and damping action cannot be obtained. Further, there is a problem that the disc spring as the urging means is expensive, and when the disc springs are stacked, the thickness increases and the diameter increases, making it difficult to use on site. Furthermore, other spring washers and the like have a problem that the range of application is limited because the elastic limit energy is small.

  The gist for achieving the object by solving the above-mentioned problems of the elastic bearing body according to the present invention is to mount a pressure receiving body made of rubber or resin inside and restrain it with a curved-shaped storage body, and at least the pressure receiving body If the compressive force is applied to the pressure receiving surface, the pressure receiving body is in a triaxial compressive stress state and continues to behave elastically unless the storage body yields.

  If the pressure receiving surface of the pressure receiving body is at a position lower than the end face position of the opening of the storage body, a reliable triaxial compressive stress state can be maintained.

  The gist of the bolt joining method according to the present invention is to provide a through hole for inserting a bolt in the elastic support body, insert a bolt into the through hole, and fix the elastic support body through the elastic support body.

  The gist of the sliding damper structure according to the present invention is that when at least two members are joined by the bolt joining method, an attachment hole for inserting a bolt in at least one member is formed into a long hole, and the one member It is possible to absorb the sliding friction energy by enabling the sliding. Further, the gist of the rotary damper structure according to the present invention is that when at least two members are joined by the bolt joining method, the other member can be rotated with respect to one member, and the frictional energy at the time of rotation can be obtained. To absorb.

The elastic bearing body of the present invention has a large elastic limit energy and can be used at a high degree of stress. The structure is simple and lightweight, and it is easy to handle and the cost is reduced. In addition, creep and relaxation do not occur during long-term use, and the elastic behavior is stable.
The friction coefficient can be increased to about twice that of the prior art by sandwiching aluminum thin plates. At the joint, the number of bolts is not only halved, but the proof stress does not decrease even after slipping, so the same design method as plastic design can be used.
Furthermore, by using it for a damper structure, the axial force decreases little over a long period of time, and large energy can be absorbed stably and reliably.

  As shown in FIG. 1, the elastic bearing body 1 according to the present invention is restrained by a curved-shaped storage body 3 in which a pressure receiving body 2 made of rubber or resin is mounted, and is attached to at least the pressure receiving surface 2 a of the pressure receiving body 2. The compression force is applied. Further, the pressure receiving surface 2 a of the pressure receiving body 2 is at a position lower than the end surface position 3 a of the opening of the storage body 3.

  The pressure receiving body 2 is formed of, for example, as a resin, a fluorine resin, a polyethylene resin, an ABS resin, an epoxy resin, a polyethylene resin, a polystyrene resin, a polyamide resin, a polyimide resin, a polycarbonate resin, an acetal resin, a polypropylene resin, or the like. . The storage body 3 is formed in a ring shape, for example, made of steel pipe, resin, ceramic, and the like, and has a bottom plate 3b. The shape of the storage body 3 is a plan view as shown in FIG. In addition to a circular shape, it includes a curved surface shape such as an elliptical shape or an arc shape.

  Only the lower half of the pressure receiving body 2 is bonded to the storage body 3 via an adhesive 4. Such an elastic support body 1 is used, for example, for elastically supporting a heavy structure such as a vehicle or a building with a predetermined spring constant.

  As shown in FIG. 2, an elastic support body 6 having a mounting hole 5 a in the bottom plate 5 is provided on both sides to form a spring structure having a clearance for deformation of the pressure receiving body 2. The bottom plate 5 is fixed to the ring-shaped storage body 3 by welding.

  As shown in FIGS. 3A and 3B, in the elastic support body 7, a through-hole 9 for inserting a bolt is provided in the pressure receiving body 2 and the bottom plate 5, and the bolt is inserted into the through-hole and the elastic support body 7. It can be fixed by interposing a support body. In addition, as shown in FIGS. 3C and 3D, the bottom plate 5 can be welded to the storage body 3 in the elastic bearing body 8.

  As shown in FIG. 4, an elastic support body 10 in which thin steel plates 11 are laminated and embedded in a part of the pressure receiving body 2 with a gap can be formed. Further, as shown in FIG. 5, the elastic support 12 can be configured by laminating a cloth 13 on a part of the pressure receiving body 2 and storing the cloth 13 in the storage 3. Examples of the cloth 13 include a canvas used for ship sails.

  Next, as a combination with the viscous damper, as shown in FIG. 6, an outer cylinder 14 is provided outside the cylindrical storage body 3 storing the pressure receiving body 2, and the viscous body 15 is disposed in the gap. A cylindrical inner cylinder 16 is disposed on the upper side. With the elastic bearing body 17 having such a structure, for example, it becomes a bearing material for heavy objects such as vehicles and buildings, and reduces vibrations in the vertical direction.

  Furthermore, as shown in FIG. 7, an elastic bearing 19 integrated with a rollable bearing 18 can be used as a heavy-weight seismic isolation bearing. In addition, as shown in FIG. 8A, integration with a normal seismic isolation device can be achieved. As shown in FIG. 8 (B), an elastic bearing body 20a in which a pressure receiving body 2 is disposed under a horizontal deformation seismic isolation device in which a metal plate is laminated and embedded in rubber, a seismic isolation device 21, and An elastic bearing body 20b is provided in which the pressure receiving body 2 and the storage body 3 are alternately arranged.

  Next, as shown in FIG. 9, the elastic bearing bodies 7 and 8 of the present invention having the through holes 9 for bolts can be used for fixing a basic anchor bolt, for example. When the fixing plate 25 is placed on the anchor bolt 23 embedded in the foundation portion 22 and the fixing nut 24 is fastened, the anchor bolt 23 is fastened using the elastic support body 1. In this way, the bolt joining method according to the present invention can be obtained. According to this bolt joining method, as shown in FIG. 10, the pressure-receiving body 2 restrained by the storage body 3 has a gentle slope of the load-displacement curve and a large displacement with respect to the load. Even if relaxation occurs, the fixing force is prevented from being lowered.

  Similarly, as shown in FIG. 11, by using the elastic bearing bodies 7 and 8 at the connecting portion of the rail 26 of the rail, it can cope with expansion and contraction due to temperature change in summer and winter and long-term loosening of the bolt. The fastening force is hardly reduced, and a healthy joined state is maintained. Furthermore, as shown in FIG. 12, for example, elastic bearing bodies 7 and 8 are used at the joints between columns and beams of a precast reinforced concrete structure. Moreover, it can be used for the same purpose also in the joint part of the reinforced concrete segments of a civil engineering structure.

  As shown in FIG. 13, when high-tensile bolts are joined in a steel structure, the steel members 27 and 28 are fastened with bolts 23, nuts 24, and elastic bearings with a friction material 28a that increases the friction coefficient interposed therebetween. The friction material 28a is, for example, an aluminum plate, a copper plate, a lead plate, a brass plate, a titanium plate, a zinc plate, a nickel plate, a thallium plate, a stainless plate, a silver plate, a gold plate, a platinum plate, an indium plate, a barium plate, or the like. Alloy plates, non-ferrous metal plates of those plated steel plates, or alumina plates, zirconia plates, titania plates, zinc oxide plates, mullite plates, silicon nitride plates, boron nitride plates, aluminum nitride plates, sialon plates, silicon carbide plates, Examples thereof include a titanium carbide plate, a boride plate, a sulfide plate, and a ceramic plate of a composite plate thereof.

  Then, as shown in FIG. 14, a bolt insertion mounting hole in at least one of the steel frames 27 is formed in the long hole 27a to allow sliding of the one member, thereby absorbing sliding friction energy. In the dynamic damper structure, the elastic bearing bodies 7 and 8 according to the present invention are used at the joint portion of the bolt. Thus, even if the plate thickness is reduced due to wear between the steel frame material 27 and the friction material 28a, the axial force of the bolt 23 is prevented from being lowered by the elastic bearing bodies 7 and 8.

  The other of the steel frames 27 and 28 is subjected to a rough surface treatment such as blasting and slides at the interface between the friction plate 28 a and the steel frame 27. Further, when the steel frames 27 and 28 and the friction material 28a are dissimilar metals, galvanic corrosion occurs. Therefore, as shown in FIG. 14, a viscoelastic material 29 or the like is provided around the friction material 28a to prevent it. It is sealed with. Furthermore, as shown in FIG. 15 (A), the friction material 28a is divided in the sliding direction so as not to entrain the wear powder in the friction material 28a, or as shown in FIG. 15 (B), the friction material A face line 28b is provided on the surface.

  As shown in FIG. 16, the sliding damper structure can be applied to a vibration control structure by providing it at the joint portion of the brace end of the steel structure. In addition, as shown in FIG. 17, by applying the sliding damper structure to the joining of both ends of the stud 30 in the steel structure, a damping structure that absorbs energy using rocking bending deformation is obtained.

  In addition, as shown in FIGS. 18 (A), (B), and (C), in the seismic wall 31 of the reinforced concrete structure, a gap is provided on the side surface thereof, and a T-shape is formed between the upper surface and the space below the beam 32. The steel frames 33 and 34 having a cross section are anchored, and a sliding damper structure using the relative deformation in the horizontal direction can be obtained. Further, as shown in FIG. 4D, a friction material may be used on the fixed side, or an integrated friction material 35 continuous from the sliding surface.

  As shown in FIG. 19, when using the elastic bearing bodies 7 and 8 of the present invention to join the bolts, the other member can be rotated and joined to one member, and the frictional energy at the time of rotation can be absorbed. This is a rotary damper structure that is used for this purpose. As shown in FIG. 19A, for example, four plates 36 can be rotated with each other, and bolted with bolts 23 and nuts 24, and instead of the washer, as shown in FIG. 19C, Use elastic bearings 7,8. Thereby, for example, by using it for a part of a seismic isolation device, as shown in FIG. 19 (B), vibration energy in a large deformation range of about ± 10 cm to ± 80 cm can be absorbed. The elastic bearing members 7 and 8 prevent a decrease in the axial force of the bolt 23 that sandwiches the plate 36 over a long period of time, and stably absorbs energy due to rotational friction.

It is the longitudinal cross-sectional view (A) of the elastic bearing body 1 which concerns on this invention, and a top view (B). They are the longitudinal cross-sectional view (A) of the elastic bearing body 6 of the other aspect of the same invention, and a top view (B). They are the longitudinal cross-sectional view (A) and top view (B) of the elastic support body 7, and the longitudinal cross-sectional view (C) and top view (D) of the elastic support body 8. It is the longitudinal cross-sectional view (A) of the elastic bearing body 10, and a bottom view (B). They are the longitudinal cross-sectional view (A) of the elastic support body 12, and a top view (B). 3 is a longitudinal sectional view of the elastic support body 17. FIG. It is a longitudinal cross-sectional view of the elastic bearing body 19. It is the longitudinal cross-sectional view (A) of the elastic bearing bodies 20a and 20b (B). It is sectional drawing which shows the volt | bolt joining method which concerns on the same this invention. It is a diagram which shows the relationship between the load (N) and bending ((delta)) of the elastic support body 6 which concerns on this invention. It is explanatory drawing which shows the example of the bolt joining method by the elastic bearing bodies 7 and 8 based on the same invention. It is explanatory drawing which shows the example of the bolt joining method by the elastic bearing bodies 7 and 8 based on the same invention. It is sectional drawing which shows the sliding damper structure by the elastic bearing bodies 7 and 8 which concern on this invention. 3 is a plan view of friction plates 27 and 28. FIG. FIG. 6 is plan views (A) and (B) showing a modification of the friction plate 28. An enlarged explanatory view (A) showing an example in which the sliding damper structure according to the present invention is applied to a brace, a cross-sectional view (B) along the line AA, and a schematic explanatory view showing the entire position (B) ). It is explanatory drawing (A) which shows the example which applied the sliding type damper to the stud 30, and the schematic explanatory drawing (B) which shows the position of the whole. They are the front view (A) which shows the example which applied the sliding-type damper structure to the earthquake-resistant wall 31, a side view (B), an expanded sectional view (C), and an expanded sectional view (D) of another example. . They are the use condition explanatory drawing (A) of the rotary type damper structure concerning this invention, (B), and a partial bottom view (C). It is sectional drawing (A) of the use condition of the disc spring 37 in a prior art example, and a top view (B).

Explanation of symbols

1 Elastic bearing body,
2 pressure receiving body, 2a pressure receiving surface,
3 container, 3a end face position,
3b bottom plate,
4 Adhesive,
5 Bottom plate, 5a Mounting hole,
6 Elastic bearing body,
7 Elastic bearing body,
8 Elastic bearing body,
9 Through hole,
10 Elastic bearing body,
11 Thin steel sheet,
12 Elastic bearing body,
13 cloth,
14 outer cylinder,
15 viscosity,
16 inner cylinder,
17 Elastic bearing body,
18 bearings,
19 Elastic bearing body,
20a, 20b elastic bearing body,
21 Seismic isolation device,
22 Foundation,
23 volts,
24 fixing nut,
25 fixing plate,
26 rails,
27, 28 Steel frame,
27a long hole,
28a friction material, 28b face line,
29 Viscoelastic material,
30 studs,
31 Seismic wall,
32 beams,
33, 34 steel frame,
35 friction material,
36 plates.

Claims (5)

A curved storage body with a pressure receiving body made of rubber or resin inside, and a compressive force acting on at least the pressure receiving surface of the pressure receiving body;
Elastic bearing body characterized by The elastic bearing body according to claim 1, wherein the pressure receiving surface of the pressure receiving body is located at a position lower than an end face position of the opening of the storage body. A through hole for inserting a bolt is provided in the elastic support body according to claim 1, and a bolt is inserted into the through hole so that the elastic support body is interposed and fixed.
A bolt joining method characterized by the above. When joining at least two members by the bolt joining method according to claim 3, a mounting hole for inserting a bolt in at least one member is formed in a long hole so that the one member can slide. To absorb sliding friction energy with
A sliding damper structure characterized by When joining at least two members by the bolt joining method according to claim 3, the other member can be rotated with respect to one member to absorb frictional energy at the time of rotation,
Rotating damper structure characterized by

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