JPH0942346A - Vibration isolation damper for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a vibration absorbing effect through simple construction by adopting such constitution as, when vibrational energy is applied (to a building), a slip is generated between a pair of friction spring elements and a cylindrical body of a movable body and at the same time both friction spring elements and cylindrical body are again made to return to a pressure-contact state, in which the vibration energy can be absorbed, by the action of a resilient element. SOLUTION: A cylindrical body 1 having a connecting part 2, which is connected to a member a2 on one side of a building (A), and a movable body 3, which has a connecting part 4 connected to a member a1 on the other side of the building (A) and the other end of which is inserted into the cylindrical body 1 so that the body 3 is able to move in the axial direction, are prepared. When a vibrational energy exceeding a preset value is applied (to the building), a slip is initiated between a pair of friction panel body 7 and an inner peripheral surface of the cylindrical body 1, while both a heavy duty spring 7b and the inner peripheral surface of the cylindrical body 1 are made again to return to pressure-contact state, in which the vibrational energy can be absorbed, owing to the action of a resilient body 8. By conducting two actions, or a slip-action for absorption/damping and a return-action to the pressure- contact state, alternately and instantaneously, the vibrational energy can be absorbed and attenuated effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolation system which is incorporated between members of a building and absorbs and attenuates vibration energy due to an earthquake or wind force acting on the building to protect the building from the energy. Regarding dampers.

[0002]

2. Description of the Related Art For example, there is a vibration damper proposed in Japanese Utility Model Laid-Open No. 2-122235. This damper has a cylindrical body having a connecting portion connected to one member of a building, and a connecting portion connected to the other member of the building, and the other end of which is inserted into the cylindrical body. A pair of friction members are arranged between the cylindrical body and the rod at a required interval with pressure contact with the inner peripheral surface of the cylindrical body on the outer periphery thereof, and opposite inclined surfaces on both inner peripheral sides. A sliding member provided, an urging member that is externally fitted to the rod, and has a pair of sloping members that have inclined surfaces facing the respective inclined surfaces of these sliding members, and a sliding member that forms a pair are provided between the urging members. An elastic member that is positioned and applies a pressing force to one of the biasing members facing the inclined surfaces of the sliding members to press the friction member against the inner peripheral surface of the cylindrical body through the sliding members by the action of the inclined surfaces. A female screw is provided on the outer periphery of the connecting portion side of the rod. The sleeve, which is loosely fitted on the rod, is moved relative to the rod by the rotation of the matching nut, and the resilient member is repelled by a biasing member and a sliding member that abut against the other end of the sleeve. The force is variable.

By the way, as a mechanism for absorbing and attenuating vibration energy, it has a structure in which a friction member, a sliding member, a biasing member, and an elastic material are complicatedly constructed. The burden is heavy.

[0004]

The problem to be solved is to obtain a structure having a relatively simple mechanical structure, which can absorb and damp vibration energy.

[0005]

In order to achieve the above-mentioned object, a cylindrical body having a connecting portion connected to one member of a building and a connecting portion connected to the other member of a building are provided. In addition, the movable body is movable in the axial direction by inserting the other end side into the cylindrical body, and the movable body is fitted on the supporting element with a space therebetween and the supporting element outer peripheral surface and the cylindrical body. A plurality of disc springs, each of which is press-fittable to the peripheral surface, are externally fitted to the stacked friction spring elements and the support elements between the friction spring elements, and the friction spring elements are attached to the support element outer peripheral surface and the cylinder. It is characterized in that it has elastic elements that are biased in a pressure-contacting manner on the peripheral surface. Further, in the invention, it is characterized in that the friction spring element is formed by a pair of stacked springs each having an intermediate sleeve between them. Further, according to the present invention, the supporting element has an adjusting element capable of increasing / decreasing the pressing force of the friction spring element with respect to the outer peripheral surface of the supporting element and the inner peripheral surface of the cylinder, and the urging force with respect to the friction spring element. And The friction spring element according to the present invention is in a mode in which a plurality of disc springs are stacked, or in a mode in which a plurality of disc springs are stacked and integrated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates a first embodiment of a building vibration isolation damper according to the present invention, which is a cylindrical body having a connecting portion 2 connected to one member a1 of the building A. 1 and a movable body 3 having a coupling portion 4 coupled to the other member a2 of the building A and having the other end side inserted in the tubular body 1 and movable in the axial direction. . In addition, a nitride layer is formed on the inner surface of the cylindrical body 1 by, for example, a low temperature salt bath nitriding method as a surface hardening method to enhance wear resistance and galling resistance of the inner surface.
The friction spring body 7 in the movable body 3 is prevented from biting. This nitride layer may be a graphite or carbon coating layer.

The movable body 3 has a stepped support surface portion 6a formed on the other end side in the cylindrical body 1 on the outer peripheral surface of the support sleeve 6 through which the rod 5 with the head 5a is inserted. Friction spring bodies 7 and 7 are fitted on the surface portion 6a with a space therebetween, an elastic body 8 is fitted between the friction spring bodies 7 and 7, and a cylindrical spacer 9 is provided on the head portion 5a and the friction spring body. It is externally fitted and integrated with 7.

A threaded portion 5b is formed on the rod 5 outside the cylindrical body 1 of the movable body 3, and a nut 10 screwed on the threaded portion 5b is rotated to operate the support sleeve 6. After that, the pressure contact force of the friction spring bodies 7 and 7 against the outer peripheral surface of the support surface portion 6a and the inner peripheral surface of the cylinder body 1 and the friction spring body 7 are urged in a pressure contact manner with the outer peripheral surface of the support surface portion 6a and the inner peripheral surface of the cylinder body 1, respectively. The urging force of the elastic body 8 can be increased or decreased.

The friction spring body 7 is composed of a pair of stacking springs 7b with an intermediate sleeve 7a in between. The stacking springs 7b are formed by stacking a plurality of disc springs to form alternating inner and outer radial slits. An elastic member such as rubber is filled and connected to form a single unit. This stacking spring 7b is pressed equally against the outer peripheral surface of the support surface portion 6a and the inner peripheral surface of the cylindrical body 1, and the vibration energy is absorbed by the opposing movements of the cylindrical body 1 and the movable body 3 in the axial direction due to the contact frictional resistance. It can be attenuated.

The repellent body 8 is composed of a plurality of disc springs 8a, and a pair of friction spring bodies 7, 7 are attached via a ring 8b such that they are equally pressed against the outer peripheral surface of the support surface portion 6a and the inner peripheral surface of the cylindrical body 1. The biasing force can be adjusted by operating the nut 10. When the sliding spring 7b and the inner peripheral surface of the cylindrical body 1 slip due to the absorption of vibration energy, the repellent body 8 again causes a gap between the overlapping spring 7b and the inner peripheral surface of the cylindrical body 1 again. The pressure is applied so that the pressure contact state capable of absorbing the vibration energy is restored.

As a result, when vibration energy exceeding the set value adjusted by the nut 10 is applied, slippage occurs between the pair of friction spring bodies 7, 7 and the inner peripheral surface of the cylindrical body 1, and at the same time, Due to the action of the elastic body 8, the stacked spring 7b and the inner peripheral surface of the cylindrical body 1 are returned to the pressure contact state in which the vibration energy can be absorbed again, and the vibration energy to be loaded is absorbed and attenuated. The sliding operation for absorbing / damping and the returning operation to the pressed state are alternately and instantaneously performed, and the vibration energy is absorbed / damped. The nitride layer formed on the inner surface of the cylindrical body 1 acts to prevent the friction spring body 7 from biting, so that the smooth sliding property of the friction spring body 7 with respect to the cylindrical body 1 is maintained, and the load of intense vibration is increased. It also responds smoothly to effectively exhibiting vibration isolation.

FIG. 2 illustrates a second embodiment of the building vibration isolation damper according to the present invention. Since the structure is basically the same as that of the first embodiment, a common structure is provided. The description will be omitted, and different configurations will be described. The friction spring bodies 7 and 7 and the repellent body 8 are externally fitted to the rod 5 and integrated, and the nut 10 screwed to the screw portion 5b is rotated to operate the ring cylinder 11 and the rod 5. The pressure contact force of the friction spring bodies 7, 7 against the outer peripheral surface and the inner peripheral surface of the cylindrical body 1 and the elastic body 8 for urging the friction spring body 7 in the pressure contact state with the outer peripheral surface of the rod 5 and the inner peripheral surface of the cylindrical body 1, respectively. The urging force can be increased or decreased. This has the same effect as that of the first embodiment.

[0013]

A. Effects of the Invention According to claim 1, when vibration energy is applied, slippage occurs between the pair of friction spring elements and the tubular body in the movable body, and at the same time, the action of the elastic element causes the friction spring element and the tubular body to move. Returns to the pressure contact state capable of absorbing the vibration energy again, and the sliding operation for absorbing / damping and the returning operation to the pressure contact state are alternately performed instantaneously, and the vibration energy is absorbed / damped. The vibration energy can be absorbed and damped while having a relatively simple mechanical structure including a friction spring element and a repulsion element in which a plurality of disc springs are integrated in a stack.

B. According to the second aspect, since the friction spring element is formed by a pair of stacked springs respectively having the intermediate sleeve between them, the pressure contact with the cylindrical inner peripheral surface and the absorbing operation are reliable and excellent.

C. According to claim 3, since the support element has the pressure contact force of the friction spring element with respect to the outer peripheral surface of the support element and the inner peripheral surface of the cylinder, and the adjustment element capable of increasing or decreasing the biasing force with respect to the friction spring element, The value of damping vibration energy can be set and dealt with according to an expected earthquake, wind force, or the like.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view illustrating a first embodiment of a building vibration isolation damper according to the present invention.

FIG. 2 is a vertical cross-sectional view illustrating a second embodiment of the building vibration isolation damper of the present invention.

[Explanation of symbols]

A Building a1 One member of the building a2 Other member of the building 1 Cylindrical body 2 Cylindrical joint part 3 Movable body 4 Movable body joint part 5 Rod (supporting element) 5a Rod head 5b Rod screw Part 6 Support sleeve (support element) 6a Support surface of support sleeve 7 Friction spring body (friction spring element) 7a Intermediate sleeve of friction spring body 7b Stacked spring of friction spring body 8 Repulsion body (repulsion element) 8a Repulsion Body disc spring 8b Repellent ring 9 Cylindrical spacer 10 Nut (adjustment element) 11 Ring tube

Claims (3)

[Claims] 1. A cylinder having a connecting portion connected to one member of a building, and a connecting portion connected to the other member of the building, and the other end of which is inserted into the cylinder. A plurality of plates which are movable in the axial direction and which are externally fitted to the support element at intervals and can be pressed against the outer peripheral surface of the support element and the outer peripheral surface of the cylinder. A spring is externally fitted to the friction spring element having a stacking shape and the support element between the friction spring elements, and repels the friction spring element to press the friction element to the outer peripheral surface of the support element and the outer peripheral surface of the cylinder, respectively. A vibration isolation damper for buildings, which is characterized by having elements. 2. The vibration isolating damper for a building according to claim 1, wherein the friction spring element is formed by a pair of stacking springs each having an intermediate sleeve between them. 3. The support element has an adjusting element capable of increasing / decreasing the pressure contact force of the friction spring element with respect to the outer peripheral surface of the support element and the inner peripheral surface of the cylinder, and the biasing force with respect to the friction spring element. The vibration isolation damper for a building according to claim 1 or 2.