JP2012225352A - Base isolation support tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation support tool improved so as to conquer the problem on a conventional height adjustment, that is, to easily and conveniently make a height adjustment.SOLUTION: This base isolation support tool is formed by interposing a base isolation part 3 between an upper support member 1 on the upper structure side and a lower support member 2 on the lower structure side, includes a screw mechanism B of straddling the lower support member 2 and the base isolation part 3, and is constituted so that a vertical interval between the upper support member 1 and the lower support member 2 can be changed and set by rotatably operating the screw mechanism B. The screw mechanism B is constituted by having a screw shaft 13 fixed to the lower support member 2 and arranged in a rising state on a lower end rigid flange of the base isolation part 3 so as to be relatively rotatable and relatively liftable, and a nut member 14 threadedly installed on the screw shaft 13 between upper-lower parts of the lower end rigid flange 10 and the lower support member 2.

Description

  The present invention relates to a seismic isolation bearing device in which a seismic isolation part is interposed between an upper support member on the upper structure side and a lower support member on the lower structure side.

  As seismic isolation bearings for isolating structures such as detached houses, warehouses, and temporary houses, those disclosed in Patent Document 1 and Patent Document 2 are known. The thing of patent document 1 is the upper flange (18) which is an upper support member by the side of the upper housing (16) which is an upper structure, and the lower flange which is a lower support member by the side of the base | substrate (12) which is a lower structure ( 14) and the seismic isolation part (10) of the laminated rubber structure interposed between those upper and lower sides.

  In Patent Document 2, an isolator (3) that is a seismic isolation part is interposed between a beam (5) that is an upper structure and a floor slab (4) that is a lower structure. The isolator (3) includes an air spring (9) and a laminated rubber (8) provided up and down. The upper base (15) of the air spring (9) functions as an upper support member, and the substrate (13) of the laminated rubber (8) functions as a lower support member.

  There are times when it is desired to adjust the height of the upper end of the seismic isolation bearing, that is, the height, for example, to level the structure to be seismically isolated using these seismic isolation bearings. Conventional seismic isolation bearings do not have a height adjustment function. In such cases, for example, the height of the base on which the seismic isolation bearings are placed is changed by setting or cutting the soil. It was. However, this means cannot be finely adjusted, and is too inefficient and cannot be used regularly.

  In the case of a seismic isolation bearing having an air spring as shown in Patent Document 2, by applying the technique disclosed in Patent Document 3, the air is increased or decreased into the diaphragm constituting the air spring, that is, by pressure adjustment. It is also possible to adopt a configuration for adjusting the height change. However, it has been difficult to accurately adjust the height with this means.

JP 2007-205492 A JP 2009-287273 A Japanese Patent Application Laid-Open No. 2004-058879

  An object of the present invention is to overcome the conventional problems related to height adjustment, that is, to provide an improved seismic isolation bearing so that height adjustment can be performed easily and conveniently with high accuracy.

The invention according to claim 1 is a seismic isolation support comprising an upper isolation member 3 interposed between an upper support member 1 on the upper structure side and a lower support member 2 on the lower structure side.
A screw mechanism B straddling the upper support member 1 or the lower support member 2 and the seismic isolation portion 3 is provided, and the screw mechanism B is rotated to operate the upper support member 1 and the lower support member 2. The vertical interval is configured to be changeable.

  The invention according to claim 2 is the seismic isolation bearing device according to claim 1, and is locked to any one of the lower end rigid flange 10 of the seismic isolation portion 3 and the lower support member 2 so as not to be relatively rotatable. And an up-and-down screw shaft 13 fitted to one of the other so as to be relatively rotatable, a state of being relatively rotatable with respect to the other, and the lower end rigid flange 10 and the lower support member 2. The screw mechanism B is configured to have a nut member 14 screwed onto the screw shaft 13 between the upper and lower sides.

  The invention according to claim 3 is the seismic isolation bearing device according to claim 2, wherein the screw shaft 13 that is locked up and deployed to the lower support member 2 is fitted to the lower end rigid flange 10. The seismic isolation portion 3 placed on the nut member 14 is configured to move up and down with respect to the lower support member 2 by the rotation of the nut member 14.

  The invention according to claim 4 is the seismic isolation bearing device according to claim 3, wherein the seismic isolation portion 3 is configured such that the member 6 on the upper support member 1 side and the member 18 on the screw mechanism B side move relative to each other. It is characterized by having a sliding bearing 17 which can be laminated.

  The invention according to claim 5 is the seismic isolation bearing device according to claim 4, wherein the seismic isolation part 3 has a plurality of elastic rubber layers 8 that are annular in the vertical direction and a rigidity that is circular in the vertical direction. It has the laminated rubber 5 with a hollow part formed by interposing between the upper support plate 6 and the lower support plate 10 by alternately laminating the plates 9, and the sliding bearing 17 is connected to the upper support plate 6 and the upper support plate 6. The lower support plate 10 is configured to be stacked and arranged so as to be capable of relative side-sliding movement.

  The invention according to claim 6 is the seismic isolation bearing device according to claim 5, wherein the upper support plate 6 having a flat plate shape is provided at a position passing through the axis P of the laminated rubber 5 with the hollow portion in the lower support plate 10. An upper projecting portion 18 having an upper surface 18a that contacts the lower surface 6a is provided, and the upper support plate 6 and the upper projecting portion 18 constitute the sliding bearing 17, and the lower support member 2 is rotated relative to the lower support member 2. A single screw shaft 13 that is locked so as to be immovable and is erected with the shaft center P as a center is provided, and a relative to an upper protruding screw portion of the screw shaft 13 from the nut member 14 The upper projecting portion 18 is fitted so as to be rotatable and relatively movable up and down.

  The invention according to claim 7 is the seismic isolation bearing device according to claim 5 or 6, wherein the seismic isolation portion 3 is hermetically joined across the upper support plate 6 and the upper support member 1. It is characterized by having an air spring 4 provided with a diaphragm 7 made of metal.

  According to the invention of claim 1, the vertical distance between the upper support member and the lower support member by a simple and convenient operation of turning the screw mechanism straddling the upper support member or the lower support member and the seismic isolation portion, In other words, the height adjustment of the seismic isolation bearing can be performed including fine adjustment. As a result, the conventional problems related to height adjustment can be overcome, that is, an improved seismic isolation bearing can be provided so that accurate and easy height adjustment can be performed.

  According to the second aspect of the present invention, the vertical screw shaft is engaged with the lower end rigid flange and the lower support member of the seismic isolation portion so as not to be relatively rotatable and fitted to the other so as to be relatively rotatable. In addition, the structure of the seismic isolation bearing is small in the number of parts including the nut member screwed on the screw shaft between the upper and lower ends of the lower end rigid flange and the lower support member. There is an advantage that the screw mechanism is rationally configured in a compact state that fits in the element. In this case, it is desirable that the screw shaft is erected and arranged so that a rational configuration in which the most part of the screw shaft is located in the seismic isolation portion whose height dimension is larger than that of the lower support member can be taken.

  According to invention of Claim 4, it has a sliding bearing comprised ranging over the member by the side of the screw mechanism which becomes the structure which has the screw shaft by which it is erected and protrudes upwards, and the member by the side of an upper support member If it is set as a seismic isolation part, it can be set as the seismic isolation bearing which can be comprised in the compact state which is not bulky laterally using the structure of a screw mechanism.

  According to the invention of claim 5, although described in detail in the section of the embodiment, the seismic isolation part can be constituted economically and rationally by using the structure of the screw mechanism, and the laminated rubber with the hollow part Defines the sliding movement limit of the sliding bearing. In addition, the seismic isolation part is surrounded by a laminated rubber with a hollow part that is configured around to accommodate the screw mechanism, so that the structure can be centrally deployed around the shaft center, making it compact and rationally with a sliding bearing and hollow The base-equipped laminated rubber, that is, the seismic isolation bearing provided with the seismic isolation part 3 can be provided.

  According to the invention of claim 6, the upper projecting portion that is integrally mounted on the lower support plate and fits over the screw shaft is the lower support whose uppermost portion is the upper support plate of the laminated rubber with the hollow portion. Therefore, if a sliding bearing is formed using both of them, that is, the lower support part and the upper protrusion part, it is economically and reasonably exempted using the structure of the screw mechanism. There is an advantage that a seismic part can be formed.

  According to the seventh aspect of the present invention, it is possible to rationally provide an air spring as a structure for providing a diaphragm made of an elastic material that is hermetically joined across the upper support plate and the upper support member, and elastically up and down. Higher dimensional seismic isolation parts to be supported can be realized while sharing and simplifying the structure.

Sectional drawing which shows structure of seismic isolation bearing (Example 1) Schematic action diagram showing a state in which the seismic isolation bearing of FIG. 1 is adjusted in height

  Embodiments of a seismic isolation bearing according to the present invention, that is, a seismic isolation bearing with a height adjustment function, will be described below with reference to the drawings.

[Example 1]
As shown in FIG. 1, the seismic isolation bearing A according to the present invention includes a seismic isolation portion 3 between an upper support member 1 on the upper structure a side and a lower support member 2 on the lower structure b side. Configured. Examples of the upper structure a include relatively small residential facilities such as a container house and a simple house. Examples of the lower structure b include a base and a floor slab. The seismic isolation portion 3 includes an air spring 4, a laminated rubber 5 with a hollow portion that is disposed below the air spring 4 and has the same axial center P as the air spring 4, and a sliding bearing formed inside the laminated rubber 5. 17.

  The air spring 4 is made of an upper support member (an example of an upper support portion) 1 made of a hard material such as metal and made of upper and lower large and small disks, and also serves as an upper support plate made of a hard material such as metal and laminated rubber 5. It has a lower support portion 6 made of a disk and a diaphragm 7 made of an elastic material such as rubber that is hermetically joined across both of them. The air spring 4 has a flat shape that is circular when viewed in the vertical direction and is short in the vertical direction and wide in the horizontal direction.

  The laminated rubber 5 with a hollow portion includes a laminated portion 11 formed by alternately laminating three (a plurality of examples) elastic rubber layers 8 and two metal-made rigid plates 9 one above the other. An example of the upper support plate 6 is interposed between a lower support plate 10 (an example of a lower end rigid flange) 10 made of a hard material such as metal and the like. Each elastic rubber layer 8 and each rigid plate 9 have the same inner diameter and are formed in an annular shape when viewed in the vertical direction, and the laminated portion 11 is formed in a cylindrical shape having a hollow portion (internal space) s. Has been. The lower support plate 10 integrally includes a bottomless cylindrical upward projecting portion (an example of a member on the screw mechanism side) 18 having a U-shaped cross-section and a center of the axis P. The upward hole 12 is formed.

  A small-diameter sliding member 18A is integrally mounted on the top of the upper projecting portion 18, and the upper surface 18a is in contact with the lower surface 6a of the lower support portion 6, and the sliding member 18A and the lower support are supported. The sliding bearing 17 is configured by stacking the part 6 so as to be capable of relative side-sliding movement. The laminated rubber 5 with the hollow portion is configured to function as an elastic stopper that elastically regulates the movement limit of relative side slip between the lower support portion 6 and the sliding member 18A. In other words, when a shake due to an earthquake or the like occurs, the lower support portion 6 and the sliding member 18A are isolated from each other by sliding relative to each other within a predetermined range determined by the laminated rubber 5 with the hollow portion.

  That is, the seismic isolation part 3 includes the sliding bearing 17, the air spring 4 disposed in series on the sliding bearing 17, and the laminated rubber 5 with a hollow portion that is provided so as to surround the sliding bearing 17. ing. The air spring 4 includes an upper support portion 1, a lower support portion 6 disposed below the upper support portion 1, and a diaphragm 7 that is hermetically joined over both of them. The sliding support 17 is configured by laminating a lower support portion 6 that is a member on the upper support member 1 side and a lower support plate 10 that is a member on the screw mechanism B side so as to be capable of relative side-sliding movement. The laminated rubber 5 with a hollow portion is configured by alternately laminating a plurality of elastic rubber layers 8 and rigid plates 9 and interposing them between an upper support plate 6 and a lower support plate 10. In the seismic isolation bearing A of Example 1, the lower support plate 10 corresponds to a lower end rigid flange as the seismic isolation part 3.

  The lower support member 2 has a bolt-shaped screw shaft 13 centered on the shaft center P and cannot be rotated by screwing or the like in an upside-down state in which the hexagonal head 13a does not protrude downward. Fixed and planted. A nut member 14 to be screwed into the protruding portion on the upper side from the lower support member 2 in the screw shaft 13 is screwed, and further the lower support plate in a state where the screw shaft 13 is inserted into the upward hole 12 thereon. 10, that is, the laminated rubber 5 with a hollow portion is covered. The upward hole 12 is fitted to the screw shaft 13 so as to be capable of relative rotation about the axis P, whereby the laminated rubber 5 can be moved up and down without being displaced in the lateral direction.

  The nut member 14 to be screwed onto the screw shaft 13 is made of, for example, a disk made of a hard material such as metal having the same diameter as the lower support plate 10, and at least a pair of handles 15, 15 for artificial operation on the outer peripheral side thereof. Is provided in a state of projecting in the radially outward direction with respect to the axis P. The handle 15 can be moved up and down by screw feed by rotating the nut member 14 while holding the handle 15 with the left and right fingers. A screw mechanism B capable of moving a up and down with respect to the lower structure b is configured. That is, the screw mechanism B straddling the lower support member 2 and the seismic isolation portion 3 is provided, and the vertical interval between the upper support member 1 and the lower support member 2 can be changed and set by turning the screw mechanism B.

  In short, the lower support plate 10 that is the lower end rigid flange of the seismic isolation portion 3 and the lower support member 2 that is either one of the lower support member 2 and the lower support member 2 are locked so as not to rotate relative to each other, and the lower one is the other. A vertically extending screw shaft 13 that is fitted to the support plate 10 so as to be rotatable relative to the lower support plate 10 and between the lower support plate 10 and the lower support member 2. The screw mechanism B is configured to have a nut member 14 screwed onto the screw shaft 13. A screw shaft 13 which is locked upright by being locked to the lower support member 2 is fitted to the lower support plate 10, and the seismic isolation part 3 placed on the nut member 14 is supported by the rotation of the nut member 14. It is configured to move up and down with respect to the member 2. Thereby, the seismic isolation support A by this invention is comprised by the seismic isolation support A with a height adjustment function.

  Then, the laminated rubber 5 with the hollow part (the laminated part 11) is formed in an annular shape when viewed in the vertical direction, and the screw shaft 13 is equipped as a single one passing through the axis P of the laminated rubber 5 with the hollow part. In addition, the nut member 14 is provided with handles 15 and 15 for rotating and operating the nut member 14. The nut member 14 and the lower support plate 10 are components that rotate relative to each other, and it is desirable to have a structure with good sliding. That is, the upper projecting portion 18 having the upper surface 18a that abuts the lower surface 6a of the flat lower support portion 6 is integrally formed at a position passing through the axis P of the laminated rubber 5 with the hollow portion in the lower support plate 10. The lower support portion 6 and the upper projecting portion 18 constitute a sliding bearing 17 that is locked to the lower support member 2 so as not to rotate relative to the lower support member 2 and is erected with the shaft center P as a center. A single screw shaft 13 is provided, and an upper projecting portion 18 is fitted to an upper projecting screw portion of the screw shaft 13 from the nut member 14 so as to be relatively rotatable and relatively movable up and down.

  FIG. 1 shows a state (lowermost state) where the nut member 14 is lowered until it comes into contact with the lower support member 2 (see FIG. 2). It is in the state mounted in the lower support member 2 via this. FIG. 2 shows a state in which the seismic isolation portion 3 (upper structure a) is lifted to the u position (u raised state) by turning the nut member 14 using the handles 15 and 15. If the height of the air spring 4 itself does not change, the upper end position of the diaphragm 6 also rises from the reference position k to the u position as shown in FIG.

  In actual height adjustment, as shown in FIG. 2, the nut shim 16 having a substantially U shape is attached to the nut member 14, the lower support member 2, and the nut member 14 by turning the nut member 14 slightly beyond the desired height. Is inserted between the upper and lower sides of the screw, and then the nut member 14 is rotated in the reverse direction and slightly lowered, whereby the height can be adjusted in a stable state where most of the load is received by the disk shim 16. The disc shim 16 is formed with a recessed groove 16a that can be set around the axis P through the screw shaft 13, and the diameter thereof is the same as that of the nut member 14 (other than that), but FIG. Then, it is intentionally deformed to a small diameter. It is advantageous if the disk shim 16 is appropriately set in height so that it can be used singly or plurally and can be finely adjusted.

  According to the seismic isolation bearing A as described above, the screw mechanism B formed between the sliding bearing 17 and the lower support member 2 is operated so as to rotate between the upper support member 1 and the lower support member 2. The vertical interval, that is, the height of the seismic isolation bearing A can be changed. In other words, it is possible to adjust the height of the seismic isolation bearing with a simple and convenient operation just by turning the screw mechanism, and because it is a screw mechanism, it is also possible to easily adjust the height of the base. It is.

  The screw mechanism B is locked to the lower support member 2 so as not to be relatively rotatable, and is vertically fitted to the upper projecting portion 18 so as to be relatively rotatable and relatively vertically movable. Since the nut member 14 is screwed to the screw shaft 13 between the lower support plate 10 and the lower support member 2, the nut member 14 equipped with the screw shaft is used for other purposes. While the mounting parts can be reasonably provided as unnecessary, the height adjustment can be performed by raising and lowering the seismic isolation portion 3 by a simple operation by simply turning the nut member 14.

  The upper protrusion 18 that is integrally provided on the lower support plate 10 and fits over the screw shaft 13 has a height higher than that of the lower support 6 that is the upper support plate of the laminated rubber 5 with a hollow portion. Since the sliding support 17 is formed by using both of them, that is, the lower support portion 6 and the upper protruding portion 18, the structure of the screw mechanism B is economical and rational. The seismic isolation part 3 can be configured. In addition, the laminated rubber 5 with a hollow portion that defines the sliding movement limit of the sliding bearing 17 is configured around the upper projecting portion 18 so that the structure can be centrally arranged around the axis P and is compact. Thus, the sliding bearing 17 and the laminated rubber 5 with the hollow part, that is, the seismic isolation part 3 have been successfully provided.

  Then, using the lower support portion 6 serving as both the upper support plate of the laminated rubber 5 with the hollow portion and the member on the upper support member 1 side of the slide support 17, the air arranged in series with the slide support 17 is provided. Since the spring 4 is provided, it can be elastically supported in the vertical direction while having a rational structure that allows further use of the member, and a higher-dimensional seismic isolation support A can be obtained. In the structure for locking the screw shaft 13 to the lower support member 2 where the lower support plate 10 is placed on the nut member 14 (Example 1), the upper protrusion 18 is fitted to the lower support plate 10. It is also possible to adopt.

  After adjusting the height by turning the nut member 14, the disk shims 16 are interposed above and below the nut member 14 and the lower support member 2, and the nut member 14 is returned and lowered to operate the nut member 14. Can be brought into contact with the upper surface of the disk shim 16. Thus, most of the upward and downward load acting as the seismic isolation bearing A is handled by the disk shim 16, and no load is applied to the screw shaft 13 or only a slight load is applied. Therefore, the screw shaft 13 needs to receive a load acting on the seismic isolation bearing A at the time of height adjustment, but it does not need to have sufficient durability to always receive the load, and the screw shaft 13 correspondingly. There is an advantage that 13 set grades can be easily reduced (for example, inexpensive materials can be used to reduce costs).

[Another Example]
The screw mechanism B includes, for example, two or more screw shafts around the axis P at equal angles, and interlocking means (such as a gear interlocking mechanism) that can rotate the plurality of screw shafts with a single handle. It can also be provided. Further, the screw mechanism B may be configured to be disposed across the upper structure a and the upper support member 1. The seismic isolation part 3 can be various as a structure including any one or more of an air spring, a laminated rubber, and a sliding bearing.

DESCRIPTION OF SYMBOLS 1 Upper support member 2 Lower support member 3 Seismic isolation part 4 Air spring 5 Laminated rubber with a hollow part 6 Upper support member side member, upper support plate 6a Lower surface 7 Diaphragm 8 Elastic rubber layer 9 Rigid plate 10 Lower end rigid flange, Lower support Plate 13 Screw shaft 14 Nut member 17 Sliding support 18 Screw mechanism side member, upper protrusion 18a Upper surface B Screw mechanism P Shaft center

Claims (7)

A seismic isolation support comprising an isolation part interposed between an upper support member on the upper structure side and a lower support member on the lower structure side,
A screw mechanism straddling the upper support member or the lower support member and the seismic isolation portion is provided, and the vertical distance between the upper support member and the lower support member can be changed and set by turning the screw mechanism. The seismic isolation bearing that is configured.   A vertically extending screw shaft that is locked to either one of the lower end rigid flange of the seismic isolation portion and the lower support member so as not to be relatively rotatable, and is fitted to either of the other to be relatively rotatable; The screw mechanism is configured to include a nut member that is screwed onto the screw shaft between the lower end rigid flange and the lower support member in a state that can rotate relative to the other. The seismic isolation bearing device according to claim 1.   The screw shaft that is locked upright by being engaged with the lower support member is fitted to the lower end rigid flange, and the seismic isolation portion placed on the nut member is rotated by the nut member. The seismic isolation bearing device according to claim 2, which is configured to move up and down with respect to the support member.   The seismic isolation bearing according to claim 3, wherein the seismic isolation portion includes a sliding bearing formed by laminating a member on the upper support member side and a member on the screw mechanism side so as to be able to move relative to each other. Ingredients.   The seismic isolation portion is interposed between an upper support plate and a lower support plate by alternately laminating a plurality of elastic rubber layers having an annular shape in the vertical direction and a rigid plate having an annular shape in the vertical direction. 5. The seismic isolation bearing according to claim 4, wherein the sliding bearing is configured by stacking and arranging an upper support plate and a lower support plate so that they can move relative to each other. Ingredients.   An upper projecting portion having an upper surface in contact with the lower surface of the flat upper support plate is provided at a position passing through the axis of the laminated rubber with the hollow portion in the lower support plate, and the upper support plate and the upper projecting portion are provided. The sliding bearing is configured with a portion, and is provided with a single screw shaft that is locked to the lower support member so as not to rotate relative to the lower support member, and is erected with the shaft center as a center. The seismic isolation support according to claim 5, wherein the upper projecting portion is fitted to an upper projecting screw portion of the screw shaft from the nut member so as to be relatively rotatable and relatively movable up and down.   The said seismic isolation part is comprised including the air spring which provides the diaphragm made from the elastic material airtightly joined over the said upper support plate and the said upper support member, The structure of Claim 5 or 6 comprised. Seismic isolation bearing.

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