JP2018071705A - Laminated rubber for base isolation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated rubber for base isolation capable of firmly exhibiting a base isolation function even under an inferior environment where water pressure or earth pressure is applied during construction or after service start, and capable of facilitating check of a laminated rubber part.SOLUTION: A laminated rubber for base isolation includes: a laminated rubber body including a connection steel plate on both upper and lower end surfaces of a laminated rubber part where rubber layers and intermediate steel plates are alternately laminated; upper and lower flanges integrally provided on the connection steel plate of the upper and lower end surfaces of the laminated rubber body; and a waterproof covering part detachably provided so as to cover an outer periphery of the laminated rubber body. At upper and lower end parts of the waterproof covering part, an outer diameter of a portion adhering to the respective flange surfaces of the upper and lower flanges is made larger than an outer diameter on a center portion side of the waterproof covering part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic isolation laminated rubber.

  Conventionally, laminated rubber is known as a seismic isolation device that is installed in a structure such as a building to reduce the seismic force on the structure.

  Laminated rubber has high (hard) rigidity in the vertical direction and low (soft) rigidity in the horizontal direction, and is disposed in a seismic isolation layer such as a foundation portion or an intermediate layer of the structure.

  In laminated rubber, a laminated rubber portion in which intermediate hard plates (intermediate steel plates) and rubber layers are alternately laminated is interposed between upper and lower flanges via a connecting steel plate. In the laminated rubber having such a structure, for example, a laminated rubber as shown in Patent Document 1 or Patent Document 2 is known in order to improve weather resistance.

  In Patent Document 1, a laminated portion (laminated rubber portion) formed by alternately laminating rubber layers and hard plates is interposed between upper and lower support plates, and a waterproof cover is detachably attached to these support plates. Seismic laminated rubber is disclosed. In Patent Document 2, the laminated rubber portion and the mounting plate are lined with rubber, and the lining layer is extended to the back surface of the mounting plate. A laminated rubber body provided with strips is disclosed. This laminated rubber body is formed on the assumption that it will be used for poor conditions of high humidity, for use in wetlands, for harbor facilities on the beach, or for connecting bridges on the sea.

JP 2009-24863 A JP-A-6-221357

  Generally, a seismic isolation pit in which laminated rubber is installed as a seismic isolation device is provided with a drainage facility, and has a structure in which water does not enter or does not accumulate.

  However, in recent years, inundation damage caused by abnormal weather and landslide disasters have not been continued. There is a risk that water and soil may enter due to burial of earth and sand.

  Thus, when there is inundation damage due to heavy rain or river inundation or inundation damage due to earth and sand disaster or burial of earth and sand, in Patent Document 1, since the waterproof cover is bonded to the support plate at both the upper and lower ends, In a poor environment where water pressure or earth pressure is applied, there is a risk of water entering from the bonded portion, and it is difficult to say that it has a highly reliable waterproof performance.

  Moreover, in patent document 2, since the rubber lining is given to the back surface side of the attachment plate which pinches | interposes a lamination | stacking rubber part in addition to the outer periphery of a lamination | stacking rubber part, the lined rubber lining layer cannot be removed. Thereby, in patent document 2, there exists a problem that the main-body part of a laminated rubber, ie, the laminated rubber main body inside a rubber lining layer, cannot be confirmed at the time of emergency inspection after a disaster.

  For this reason, in recent years, the seismic isolation function has been demonstrated soundly even in poor environments where water pressure and earth pressure are incurred due to inundation damage and landslides including submersion during construction and after the start of operation. A laminated rubber that can easily confirm the laminated rubber body and the laminated rubber portion at the time of inspection is desired.

  An object of the present invention is to provide a laminated rubber for seismic isolation that can exert a seismic isolation function soundly even in a poor environment where water pressure and earth pressure are applied, and can easily check the laminated rubber body. It is to be.

One aspect of the seismic isolation laminated rubber of the present invention is:
A laminated rubber body provided with connecting steel plates on both upper and lower end surfaces of a laminated rubber portion in which a plurality of rubber layers and intermediate steel plates are alternately laminated;
Upper and lower flanges integrally provided on the connecting steel plates on the upper and lower end faces of the laminated rubber body;
A waterproof covering provided detachably so as to cover the outer periphery of the laminated rubber body;
Have
Sealing portions are provided on the upper and lower end portions of the waterproof covering portion in close contact with the upper and lower flanges, and the outer diameter of the sealing portion is larger than the outer diameter on the central portion side of the waterproof covering portion. take.

  According to the present invention, an inexpensive laminated rubber for seismic isolation that can make the seismic isolation function sound even in a poor environment where water pressure and earth pressure are applied, and can easily check the laminated rubber body. Can be realized.

It is a longitudinal cross-sectional view of the laminated rubber for seismic isolation of Embodiment 1 which concerns on this invention. It is a side view of the laminated rubber for seismic isolation. It is a perspective view of the waterproof sheet in the laminated rubber for seismic isolation. It is a top view of the waterproof sheet. FIG. 3 is a longitudinal sectional view showing a deformation of the seismic isolation laminated rubber according to the first embodiment. It is a longitudinal cross-sectional view of the laminated rubber for seismic isolation of Embodiment 2 which concerns on this invention. It is a longitudinal cross-sectional view of the laminated rubber for seismic isolation of Embodiment 3 which concerns on this invention. It is an expanded sectional view which shows the area | region adhere | attached on the lower flange of a sealing part.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a seismic isolation laminated rubber according to an embodiment of the present invention, and FIG. 2 is a side view of the seismic isolation laminated rubber.

  As shown in FIGS. 1 and 2, the seismic isolation laminated rubber 10 is interposed between a lower structure such as a building foundation and an upper structure. The seismic isolation laminated rubber 10 includes a laminated rubber body 11, an upper flange 12, a lower flange 13, a cushion material 14, a waterproof covering portion 15, and sealing portions 152 and 153.

  The laminated rubber body 11 includes laminated rubber portions 110 in which a plurality of rubber layers and intermediate steel plates are alternately laminated, and connecting steel plates 113 and 114 that are integrally fixed to both upper and lower end surfaces of the laminated rubber portion 110. The outer diameters of the connecting steel plates 113 and 114 are larger than the outer diameter of the laminated rubber portion 110, and a step is formed between the laminated rubber portion 110 and the connecting steel plates 113 and 114.

  In the present embodiment, the laminated rubber portion 110 is formed by alternately laminating rubber-like elastic plates 111 mainly composed of natural rubber and intermediate steel plates 112, and connecting steel plates 113 and 114 are added to the upper and lower ends of the laminated rubber portion 110. It has a sulfur bonded structure. A cylindrical hollow portion may be formed at the center of the laminated rubber body 11. A metal plug may be press-fitted into the hollow portion. In the present embodiment, rubber-like elastic plate 111 and intermediate steel plate 112 are each formed in a disk shape. Thereby, the laminated rubber portion 110 has a cylindrical shape.

  Here, the laminated rubber body 11 employs a steel plate exposed structure that is excellent in surface pressure dependency and the like.

  The upper flange 12 and the lower flange 13 are fastened to the upper and lower end surfaces (connection steel plates 113 and 114) of the laminated rubber body 11 by bolts 16 and are integrally joined.

The upper and lower flanges 12 and 13 are plate-shaped steel plates, and are formed in a disk shape in the present embodiment. A plurality of flange fixing bolt holes 40 for fixing the upper and lower flanges 12 and 13 to the upper structure and the lower structure are formed in the peripheral portions of the upper and lower flanges 12 and 13. The bolt holes 40 are formed in the flanges 12 and 13 so as to surround the laminated rubber main body 11 on the same circumference centering on the axis of the seismic isolation laminated rubber 10 and penetrating in the vertical direction. Yes. The bolt hole 40 has a bolt 30 (see FIG. 8) from a surface (also referred to as a “flange surface”) on the connecting steel plate fastening side in the seismic isolation laminated rubber 10 disposed between the upper structure and the lower structure. Is inserted. The “flange surface” in the present embodiment is a surface on the connecting steel plate fastening side in each of the upper and lower flanges 12 and 13 and is a surface that is in close contact with and joined to the upper and lower end surfaces of the laminated rubber body 11. . That is, the flange surface is a surface on the side where the laminated rubber body 11 is sandwiched and the upper and lower flanges 12 and 13 face each other.
The upper and lower flanges 12 and 13 are fixed to the upper structure and the lower structure by the bolt holes 40 and the bolts 30 inserted into the bolt holes 40, respectively.

  The upper and lower flanges 12 and 13 are formed with connecting steel plate bolt holes 19 into which the bolts 16 are inserted, and the connecting steel plate bolt holes 19 are sealed to ensure waterproofness. The sealing material used for the sealing treatment may be any waterproof material as long as it is waterproof. Here, the same sealing material as that used for the sealing portions 152 and 153 is used to ensure waterproofness. ing. Details of the sealing units 152 and 153 will be described later.

  The cushion material 14 is provided so as to surround the outer periphery of the laminated rubber portion 110. The cushion material 14 is elastically deformed to absorb the impact on the laminated rubber portion 110. The cushioning material 14 is made of, for example, an independent foamed polyurethane foam, polyether foam, polyethylene foam, or rubber-based material (ethylene propylene rubber, chlorosulfonated polyethylene, butyl rubber, silicone rubber, fluoro rubber, CHC, elastomer, etc.). It is formed. In the laminated rubber portion 110, the cushion material 14 is closely attached to an uneven outer peripheral surface that protrudes outward from the outer peripheral edge of the rubber elastic plate 111, and the outer peripheral surface of the intermediate steel plate 112 is attached to the outer peripheral surface. It is provided to cover. Since the cushion material 14 is elastically deformed, the cushion material 14 is mated corresponding to the unevenness of the outer circumferential surface of the laminated rubber portion 110, and the outer circumferential surface of the cushion material 14 is flush with or substantially flush with the outer circumferential surfaces of the connecting steel plates 113 and 114. is there. The cushion material 14 is provided so as to fill a step between the laminated rubber portion 110 and the connecting steel plates 113 and 114. An insulating tape 21 is adhered to the outer peripheral surfaces of the connecting steel plates 113 and 114. In the present embodiment, the insulating tape 21 is wound and stuck so as to cover the outer periphery of the cushion material 14 for convenience, but only the outer peripheral surface of the connecting steel plates 113 and 114 is required. Thereby, when removing the waterproof sheet 151 from the laminated rubber main body 11, it can be removed without damaging the laminated rubber main body 11. The cushion material 14 is detachable after being attached to the laminated rubber body 11.

  A waterproof covering 15 is provided so as to cover the outer peripheral surface of the cushion material 14. In the present embodiment, the waterproof covering portion 15 is provided in close contact with the outer peripheral surface of the cushion material 14 to which the insulating tape 21 is adhered.

  The waterproof coating 15 is cylindrical and covers the laminated rubber body 11 to be waterproof. The waterproof covering 15 has a waterproof sheet 151.

  The waterproof sheet 151 is provided in a circumferential shape so as to cover the outer periphery of the laminated rubber body 11. The waterproof sheet 151 has elasticity that deforms following the deformation of the laminated rubber portion 110. The waterproof sheet 151 is a vulcanized rubber sheet, for example, and has stretchability and watertightness due to elastic deformation. As long as the waterproof sheet 151 is circumferentially arranged so as to surround the outer periphery of the laminated rubber body 11, a gap may be formed between the waterproof sheet 151 and the cushion material 14.

  In the present embodiment, the waterproof sheet 151 is arranged in a circumferential shape in close contact with the outer peripheral surface of the cushion material 14.

  As shown in FIGS. 3 and 4, the waterproof sheet 151 is arranged in a circumferential shape by wrapping a long material having the same width as the height of the laminated rubber body 11 around the outer periphery of the cushion material 14. The portion 156 is bonded with a joint material 157 to form a cylindrical shape. Note that the overlapping portion 156 may be provided with a sealing portion 159 formed by a sealing process. The waterproof sheet 151 is bonded to a member located on the inner peripheral side thereof, here, the insulating tape 21 with a joint material 158 made of butyl rubber or the like.

  The waterproof sheet 151 is detachable. When the waterproof sheet 151 is removed from the outer peripheral surface of the cushion material 14 covering the outer periphery of the laminated rubber main body 11, the waterproof sheet 151 is cut in the height direction of the laminated rubber main body 11, for example. Thereby, even after the waterproof sheet 151 is provided on the outer periphery of the cushioning material 14, it can be easily removed at the time of maintenance such as an emergency inspection after a disaster, and the laminated rubber body 11 having the cushioning material 14 can be easily inspected. It can be carried out. Further, the laminated rubber body 11 can be exposed and inspected by removing the cushion material 14.

  The sealing portions 152 and 153 are provided on the upper and lower ends of the waterproof sheet 151 as the waterproof covering portion 15 in close contact with the upper and lower flanges 12 and 13, respectively, in a watertight manner. Sealing portions 152 and 153 of the first embodiment are curable rubber-like elastic bodies (including rubber elastic bodies), and have stretchability and shearing adhesive force that has shearing force even after bonding. Following the deformation of the rubber body 11. It is preferable that the sealing parts 152 and 153 are not a regular sealing material molded in advance by extrusion molding or the like, but an irregular sealing material that is cured after being disposed at a disposition location with a paste-like material to become a rubber shape. As the amorphous sealing material used as the sealing portions 152 and 153, a one-component type that is moisture-cured, oxygen-cured, or dry-cured and a two-component type that is reactive-cured are applied. A rubber-like elastic body as the sealing portions 152 and 153 is formed of any of these sealing materials. The sealing portions 152 and 153 are, for example, urethane-based, silicone-based, modified silicone-based, epoxy-based, acrylic-based, butyl rubber-based, thiocol-based, SBR (Styrene-Butadiene Rubber) -based sealants, etc. It is formed using.

  The sealing portions 152 and 153 are upper and lower end portions of the waterproof covering portion 15 and are detachably provided across the outer peripheral surfaces of the upper and lower end portions of the waterproof sheet 151 and the respective flange surfaces of the upper and lower flanges. The sealing portions 152 and 153 are in close contact with the flange surfaces of the upper and lower flanges 12 and 13, respectively, and the outer diameter of the portion that is in close contact with the respective flange surfaces is the central portion of the waterproof covering portion 15, here the outer diameter of the waterproof sheet 151. The contact portion between the waterproof sheet 151 and the upper and lower flanges 12 and 13 is closed.

  It is desirable that the sealing portions 152 and 153 are bonded on the flange surfaces of the upper and lower flanges 12 and 13 in an end surface region E having an area from the outer surface of the upper and lower ends of the waterproof sheet 151 to the outer periphery passing through a predetermined position. This predetermined position is exposed on the flange surface of the upper and lower flanges 12 and 13 and is adjacent to or close to the outer edge of a fastening member (fastening region) that fastens the upper and lower flanges 12 and 13 to the upper and lower structures, respectively. It is a position to do. Specifically, the predetermined position is a position in the vicinity of the bolt hole 40 of the upper and lower flanges 12 and 13, and the bolt inserted through the bolt hole 40 is adjacent to or close to the head of the bolt that is locked to the flange surface. Position. FIG. 8 is an enlarged cross-sectional view showing a region bonded to the lower flange 13 of the sealing portion 153. As shown in FIG. 8, the sealing portion 153 has a circumference (laminated rubber main body) that is in contact with a position (predetermined position) adjacent to or close to the outer diameter of the head 32 of the bolt 30 inserted through the bolt hole 40 of the lower flange 13. 11 and a region E surrounded by the outer surface of the lower end of the waterproof sheet 151, and is provided in close contact with the flange surface of the lower flange 13. Although FIG. 8 shows a state where the sealing portion 153 is bonded to the lower flange 13, the region E where the sealing portion 152 is bonded to the upper flange 12 is similarly defined. The length from the outer surface of the upper and lower ends of the waterproof sheet 151 to be the region E to a predetermined position is preferably 22 mm or more, for example.

  Thereby, the water tightness of the upper and lower ends of the waterproof sheet 151 is improved, and the waterproof property of the seismic isolation laminated rubber 10 can be improved.

  Thus, in the present embodiment, the upper and lower flanges 12 and 13 provided integrally with the connecting steel plates 113 and 114 on the upper and lower end surfaces of the laminated rubber body 11 and the waterproof provided to cover the outer periphery of the laminated rubber body 11. A waterproof covering portion 15 including a sheet 151. In the sealing portions 152 and 153 provided on the upper and lower end portions 15a and 15b of the waterproof sheet 151 as the waterproof covering portion 15, the outer diameter of the laminated rubber of the waterproof covering portion 15 (waterproof sheet 151) that is in close contact with each flange surface It is larger than the outer diameter of the portion (center portion) covering the portion 110 (region E shown in FIG. 1). The sealing portions 152 and 153 have a shape in which an outer edge extends from the central portion in the vertical direction of the waterproof sheet 151 toward the upper and lower flanges 12 and 13 and the outer surface becomes an inclined surface or a concave curved surface that opens upward.

  In this way, the upper and lower end portions 15a and 15b of the waterproof covering portion 15 (specifically, the waterproof sheet 151) are hermetically adhered to the flange surfaces of the upper and lower flanges 12 and 13 by the sealing portions 152 and 153, respectively. The gap between the upper and lower end portions 15a, 15b of the waterproof covering portion 15 and the upper and lower flanges 12, 13 is completely closed. Thereby, while waterproofing can be improved and a weather resistance can also be improved, the durability with respect to the load from the outside can be aimed at the laminated rubber 10 for seismic isolation.

  Further, the laminated rubber main body 11 is covered with a cushion material 14 and alleviates the impact received from the outside of the seismic isolation laminated rubber 10.

  This prevents water from entering the laminated rubber part 110 from the outside without waterproofing the entire outer edges of the upper and lower flanges 12 and 13, and has sufficient durability to withstand water pressure even when submerged. Have high waterproof performance. In addition, it has sufficient durability to withstand earth pressure even in situations where it is buried in soil due to a sediment disaster.

Therefore, the seismic isolation function can be demonstrated soundly even in a poor environment where water pressure or earth pressure due to inundation damage or earth and sand disaster including submergence during construction or after start of operation, and cushioning material Thus, it is possible to easily check the laminated rubber main body 11 and the laminated rubber portion 110 including 14.
Further, since the entire outer edge portions of the upper and lower flanges 12 and 13 are not waterproofed, they can be manufactured at a low cost.

  The waterproof sheet 151 and the sealing parts 152 and 153 which are the waterproof covering part 15 of the seismic isolation laminated rubber 10 are intended to improve the waterproofness of the parts covered by the waterproof sheet 151 and the sealing parts 152 and 153. Any configuration may be used as long as it exists. For example, the seismic isolation laminated rubber 10A shown in FIG. 5 includes the waterproof sheet 151 and the sealing parts 152 and 153, which are the waterproof coating part 15, in the configuration of the seismic isolation laminated rubber 10 and are formed of a weather resistant coating material. The waterproof covering portion 15A may be used.

  The waterproof covering portion 15 </ b> A is formed by applying a coating material such as a solution-like silicone rubber to the outer peripheral surface of the laminated rubber body 11 and lining it. At the time of this lining, the outer diameter of the portion that adheres to the flange surfaces of the upper and lower flanges 12 and 13 in the upper and lower end portions 152A and 153A of the waterproof covering portion 15A as a sealing portion is the central portion of the laminated rubber body 11, specifically, The thick rubber layer 110 is formed by thick coating so as to be larger than the outer diameter of the portion 151A covering the outer periphery of the laminated rubber portion 110. Thus, a portion 151A that covers the outer periphery of the laminated rubber portion 110 corresponding to the waterproof sheet 151 is formed of a coating material, and the upper and lower flanges 12, A sealing portion formed of a coating material is provided so as to be in close contact with each of the 13. In addition, the outer diameter of the sealing portion is larger than the outer diameter on the central portion side of the waterproof covering portion 15A (the outer diameter of the portion covering the outer periphery of the laminated rubber portion 110 corresponding to the waterproof sheet 151). Therefore, the water tightness of the upper and lower end portions of the waterproof covering portion 15A is improved, and the waterproof property of the seismic isolation laminated rubber 10A can be improved.

(Embodiment 2)
FIG. 6 is a longitudinal sectional view of the seismic isolation laminated rubber 10B according to the second embodiment of the present invention. The seismic isolation laminated rubber 10B has the same basic configuration as the seismic isolation laminated rubber 10 corresponding to the first embodiment shown in FIG. 1, and the same reference numerals are used for the same components. A description thereof will be omitted. Further, the operational effects of the components having the same names as the components in the first embodiment are the same.

  As shown in FIG. 6, the seismic isolation laminated rubber 10 </ b> B includes a laminated rubber main body 11 </ b> B, an upper flange 12, a lower flange 13, a waterproof covering portion 15, and sealing portions 152 and 153.

  The laminated rubber body 11B includes laminated rubber portions 110B in which a plurality of rubber layers and intermediate steel plates are alternately laminated, and connecting steel plates 113 and 114 integrally fixed to upper and lower end surfaces of the laminated rubber portion 110B.

  In the present embodiment, the laminated rubber portion 110B is a so-called coating type in which a rubber-like elastic plate 111B mainly composed of natural rubber and an intermediate steel plate 112B are alternately laminated, and the outer peripheral surface of the laminated portion is covered with a coating rubber. The structure is adopted. Similar to the laminated rubber body 11, the laminated rubber body 11B has a structure in which the connecting steel plates 113 and 114 are vulcanized and bonded to the upper and lower ends of the laminated rubber part 110B. The laminated rubber body 11B may also be formed with a cylindrical hollow portion at the center as in the laminated rubber body 11. A metal plug may be press-fitted into the hollow portion. In the present embodiment, rubber-like elastic plate 111B and intermediate steel plate 112B are each formed in a disk shape. As a result, the laminated rubber portion 110B has a cylindrical shape.

  The upper flange 12 and the lower flange 13 are integrally joined to the upper and lower end surfaces (the connecting steel plates 113 and 114) of the laminated rubber main body 11B by bolt fastening (the same structure as the bolt 16 fastening in FIG. 1).

  Further, in the laminated rubber main body 11B, no step is formed between the laminated rubber portion 110B and the connecting steel plates 113 and 114.

A waterproof sheet 151 as a waterproof coating portion 15 similar to that of the first embodiment is detachably provided on the outer peripheral surface of the laminated rubber main body 11B so as to cover the outer peripheral surface. In the present embodiment, the waterproof sheet 151 of the waterproof covering portion 15 is bonded to the outer peripheral surface of the laminated rubber main body 11B by a joint material 158 (see FIG. 3) made of butyl or the like. An insulating tape 21A is attached to the outer peripheral surface of the connecting steel plates 113 and 114 exposed on the outer peripheral surface of the laminated rubber main body 11B, and the laminated rubber main body 11B is damaged when the waterproof sheet 151 is removed from the laminated rubber main body 11B. It is removable without giving. As in the first embodiment, the insulating tape 21A may be attached to the entire outer peripheral surface of the laminated rubber body 11B including the outer peripheral surfaces of the connecting steel plates 113 and 114.
In the configuration of the seismic isolation laminated rubber 10B, the attachment method for detachably attaching the waterproof sheet 151 is the same as in the first embodiment except that the attachment target is different, and the description thereof is omitted.
Sealing portions 152 and 153 provided at the upper and lower end portions of the waterproof sheet 151 are in close contact with the flange surfaces of the upper and lower flanges 12 and 13 in the region E, respectively. The outer diameters of the sealing portions 152 and 153 are larger than the outer diameter of the waterproof sheet 151. Specifically, the outer diameter of the part that is in close contact with the flange surface in the sealing portions 152 and 153 is larger than the outer diameter on the central portion side of the cylindrical waterproof sheet 151 as the waterproof covering portion 15. In the present embodiment, as described above, the region E is inserted from the outer surface position of the upper and lower ends of the waterproof sheet 151 to a position in the vicinity of the bolt hole 40, more specifically, the bolt hole 40. This is a region having an area up to the circumference passing through a position in contact with the outer diameter of the head of the bolt 30 (see FIG. 8).

Thus, according to the seismic isolation laminated rubber 10B, the sealing portion provided across the outer surfaces of the upper and lower ends of the waterproof sheet 151 around the laminated rubber main body 11B and the flange surfaces of the upper and lower flanges 12 and 13. By 152 and 153, the space between the upper and lower ends of the waterproof sheet 151 and the upper and lower flanges 12 and 13 is airtightly closed. Therefore, the seismic isolation laminated rubber 10B prevents water from entering the laminated rubber part 110B from the outside without applying waterproof treatment to the entire outer edge part of the upper and lower flanges 12 and 13, and even when water is submerged, It does not enter the laminated rubber body 11B.
Therefore, the seismic isolation function can be demonstrated soundly even in poor environments where water pressure and earth pressure due to inundation damage and earth and sand disasters including submergence during construction and after start of operation, and laminated rubber It is possible to easily check the part 110B. Moreover, it can manufacture at low cost, without performing the waterproof process to the whole outer edge part of the upper-and-lower flanges 12 and 13. FIG.

  In the seismic isolation laminated rubber 10B of the present embodiment, the waterproof covering 15 can be the waterproof covering 15A of the seismic isolation laminated rubber 10A, which is a modification of the first embodiment. The same effect as the effect by the waterproof coating 15A in the seismic isolation laminated rubber 10A can be obtained.

(Embodiment 3)
FIG. 7 is a longitudinal sectional view of the seismic isolation laminated rubber 10C according to the third embodiment of the present invention. The seismic isolation laminated rubber 10C has the same basic configuration as the seismic isolation laminated rubber 10B corresponding to the second embodiment shown in FIG. 6, and the same reference numerals are used for the same components. A description thereof will be omitted. Further, the operational effects of the components having the same names as the components in the second embodiment are the same.

  The seismic isolation laminated rubber 10C shown in FIG. 7 is a structure in which the cushioning material 14C covering the outer periphery of the laminated rubber main body 11B is provided between the laminated rubber main body 11B and the waterproof sheet 151 in the configuration of the seismic isolation laminated rubber 10B. It is. The waterproof sheet 151 and the cushion material 14C can be removed from the attachment target.

  Thereby, while having the same effect as Embodiment 2, since the laminated rubber main body 11B is covered with the cushion material 14C, the seismic isolation laminated rubber 10C can withstand water pressure and earth pressure.

  That is, the seismic isolation laminated rubber 10C prevents water from entering the laminated rubber portion 110B from the outside without applying waterproof treatment to the entire outer edge portion of the upper and lower flanges 12 and 13, and even when it is submerged in water pressure. It has sufficient durability to withstand and can maintain high waterproof performance. In addition, it has sufficient durability to withstand earth pressure even in situations where it is buried in soil due to a sediment disaster.

  Therefore, the seismic isolation function can be exercised soundly even in a poor environment where water pressure or earth pressure due to inundation damage or earth and sand disaster including submergence during construction or after start of operation, and waterproof sheet Since 151 and the sealing parts 152 and 153 are detachable, the laminated rubber main body 11B including the cushion material 14C can be confirmed by removing them even after a disaster. Moreover, the cushioning material 14C can also be removed and the inner part of the waterproof sheet 151, that is, the laminated rubber main body 11B can be confirmed. In addition, since the waterproof process is not performed on the entire outer edge portions of the upper and lower flanges 12 and 13, the cost of the waterproof process on the upper and lower flanges can be reduced.

  In the seismic isolation laminated rubber 10C of the present embodiment, the waterproof covering 151 of the seismic isolation laminated rubber 10A, which is a modification of the first embodiment, is used as the waterproof sheet 151 and the sealing portions 152, 153 of the waterproof covering 15. 15A can be used. The same effect as the effect by the waterproof coating 15A in the seismic isolation laminated rubber 10A can be obtained. Further, the laminated rubber bodies 11 and 11B may have a protective rubber on the outer periphery of the laminated rubber portions 110 and 110B. The protective rubber is formed by winding a vulcanized tape-shaped protective rubber around the outer periphery of the laminated rubber portions 110 and 110B so as to have a predetermined thickness (for example, 5 mm thickness) in each of the laminated rubber bodies 11 and 11B. Is done. When the laminated rubber bodies 11 and 11B having this configuration are used, in the configuration of each embodiment, when the insulating tapes 21 and 21A are attached to the outer periphery of the laminated rubber portions 110 and 110B, they are attached to the outer periphery of the protective rubber. Worn. The outer dimensions of the protective rubber are smaller than the outer dimensions of the connecting steel plates 113 and 114.

  Further, in the seismic isolation laminated rubber 10, 10A, 10B, 10C of each embodiment and modification, the waterproof sheet 151 and the sealing parts 152, 152A, 153, 153A as the waterproof covering part 15 or the waterproof covering part 15, A top coat portion formed of a weather-resistant material may be further attached to the outer periphery of 15A so as to cover the waterproof coating portions 15 and 15A.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The embodiment of the present invention has been described above. The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. That is, the description of the configuration of the apparatus and the shape of each part is an example, and it is obvious that various modifications and additions to these examples are possible within the scope of the present invention.

  The laminated rubber for seismic isolation according to the present invention can exert its seismic isolation function soundly even in a poor environment where water pressure or earth pressure is applied during construction or after start of service, and the laminated rubber can be easily confirmed. It has the effect of providing laminated rubber for seismic isolation, and is useful as a seismic isolation device.

10, 10A, 10B, 10C Seismic isolation laminated rubber 11, 11B Laminated rubber body 12 Upper flange 13 Lower flange 14, 14C Cushion material 15, 15A Waterproof coating 16 Bolt 19 Bolt hole 21, 21A Insulating tape 30 Bolt 40 Bolt hole 110, 110B Laminated rubber portion 111, 111B Rubber elastic plate 112, 112B Intermediate steel plate 113, 114 Connecting steel plate 151 Waterproof sheet 151A Site 156 Overlapping portion 157, 158 Joint material

Claims (9)

A laminated rubber body provided with connecting steel plates on both upper and lower end surfaces of a laminated rubber portion in which a plurality of rubber layers and intermediate steel plates are alternately laminated;
Upper and lower flanges integrally provided on the connecting steel plates on the upper and lower end faces of the laminated rubber body;
A waterproof covering provided detachably so as to cover the outer periphery of the laminated rubber body;
Have
Sealing portions are provided in close contact with the upper and lower flanges on the upper and lower end portions of the waterproof covering portion, and the outer diameter of the sealing portion is larger than the outer diameter on the central portion side of the waterproof covering portion.
Laminated rubber for seismic isolation. Between the laminated rubber body and the waterproof covering portion, a cushion material is provided so as to cover at least the outer periphery of the laminated rubber body.
The seismic isolation laminated rubber according to claim 1. The laminated rubber body has a coated rubber layer that covers the outer circumference of the laminated rubber portion and has an outer diameter substantially equal to the outer diameter of the connecting steel plate,
The laminated rubber for seismic isolation according to claim 1 or 2. The laminated rubber body has an outer diameter greater than the outer diameter of the laminated rubber portion, and has a step formed between the laminated rubber portion and the connected steel plate.
The laminated rubber for seismic isolation according to claim 1 or 2. The waterproof covering portion is formed of a cylindrical waterproof sheet arranged circumferentially on the outer periphery of the laminated rubber body, and the sealing portion includes a contact portion between the upper and lower end portions of the waterproof sheet and the upper and lower flanges. Occluded,
The laminated rubber for seismic isolation according to any one of claims 1 to 4. The waterproof sheet is formed by adhering overlapping portions arranged circumferentially with a joint material,
The laminated rubber for seismic isolation according to claim 5. The sealing part is a curable rubber-like elastic body.
The laminated rubber for seismic isolation according to any one of claims 1 to 6. The waterproof covering portion is a weather resistant coating material formed on the outer peripheral surface of the laminated rubber body, and the sealing portion is formed of the coating material.
The laminated rubber for seismic isolation according to any one of claims 1 to 4. The upper and lower flanges are respectively fixed to connecting steel plates constituting upper and lower end surfaces of the laminated rubber body through bolts,
The bolt fastening portion of the upper and lower flanges is sealed.
The laminated rubber for seismic isolation according to any one of claims 1 to 8.

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