JP2010190255A - Torsional damper and torsional damper connecting structure - Google Patents

Abstract

A torsional damper that twists two arms projecting from both ends of a cylindrical member in the opposite direction and twists them causes not only a torsion but also a bending moment, and efficiently transmits only the torsion to the substrate. It was not a thing. Further, when this torsional damper is attached to the structure, it can be applied only in one direction, and the effect is not sufficient for a structure that responds and displaces in two directions.
A torsion damper (1) comprises a base member (2) capable of torsional deformation, and two or more links (3, 4) constituted by a main arm (5) and an auxiliary arm (6) connected to each other. Each of the links can be rotated in different directions so that the substrate 2 is twisted. Since the links 3 and 4 have a configuration in which the main arm 5 and the auxiliary arm 6 are connected to each other, it is difficult to generate a bending moment and a shearing force on the base material 2 and torsion can be efficiently transmitted to the base material. Moreover, since it is comprised from the base material 2 and the two or more links 3 and 4, the follow-up with respect to a deformation | transformation of two directions is possible.
[Selection] Figure 1

Description

  The present invention is a damper that absorbs energy given to a structural system due to a large-scale earthquake or the like. Specifically, a torsion damper that absorbs energy by converting energy into shear plastic deformation by torsion, and this damper It relates to an attached connecting structure.

  Since the Hyogoken-Nanbu Earthquake, various measures have been taken, including seismic isolation structures such as rubber bearings, to protect structures such as the upper and lower structures of bridges from large external forces. A damper is one of the countermeasures, and it can effectively reduce the seismic force acting by attaching the structure without making a relatively large modification. is there.

  There are various types of dampers. Bingham dampers, oil dampers, and the like have been conventionally used for parts that are required to follow large deformations. However, these dampers have a complex structure, are difficult to handle, and are relatively expensive, so there is a potential demand for dampers that overcome these problems.

Dampers that use steel have features such as easy maintenance, excellent economy, and excellent long-term durability, but there are few structures that can follow large deformations like Bingham dampers and oil dampers. .
As a method of utilizing the characteristics of steel dampers, it is conceivable to use axial force, bending, and shearing force. However, when axial force (axial compressive force) is repeatedly applied, the steel material tends to buckle and bend. When repeatedly acting, there is a problem that the material near the neutral axis of the steel material is difficult to be used up to the plastic region.
On the other hand, if a torsional force is repeatedly applied to a steel material to cause shear plastic deformation, buckling is less likely to occur, and the entire cross section of the steel material can be effectively utilized. As a damper using steel material, a torsional damper is attracting attention. is there. Starting with this torsional damper made of steel, the torsional damper as a whole has been attracting attention, and for example, a proposal as disclosed in Patent Document 1 has been made.

JP 2008-144447 A

In the case of a torsional damper, since it is necessary to add torsion, it often takes the shape of a cylinder or a rod with an axial core, and one arm projects from each end (or near the end) of the member. Many of these have a structure in which they are twisted in opposite directions to add twist, and Patent Document 1 also has this structure.
However, when force is applied to both ends of a cylindrical (or rod-shaped) base material as shown in FIG. 16, not only torsion but also bending moment M and shearing force Q are generated, and only torsion is efficiently cylindrical (or It was not conveyed to the base material.

In addition, when the damper of Patent Document 1 is attached to a structure, as shown in FIG. 17, it can deal with only one direction (the direction perpendicular to the bridge axis in the figure). its effect was not sufficient for structure creation you response displacement such axially in two directions.

  An object of the present invention is to solve such problems.

The torsional damper of the present invention is a damper that is installed between opposing structures and absorbs energy by generating shear plastic deformation due to torsion, and is a cylindrical or rod-like base material capable of torsional deformation, A positive link capable of acting on a predetermined position of the base material with a rotational force having a base axis as a substantially rotational axis, and a rotational force opposite to the rotational force from the rotational force acting position of the positive link to the base material And an anti-link that can act at a position spaced apart in the axial direction.
The positive link has a main arm that is connected to the base material in a rotationally fixed manner at a rotational force acting position by the positive link, and an auxiliary arm that is rotatably connected to the base material, and the anti-link is It has a main arm that is connected to the base material in a rotational force acting position by the anti-link, and an auxiliary arm that is rotatably connected to the base material.
The auxiliary arm of the positive link overlaps or approaches the base axis direction of the main arm of the anti-link and is connected to the base material, and the auxiliary arm of the anti-link extends in the base axis direction of the main arm of the positive link. The main arm and the auxiliary arm of the positive link are linked to each other by being overlapped or approached to each other at a position apart from the substrate connecting position on the arm. The main arm and the auxiliary arm are connected at a position spaced apart from the base material connection position on the arm.

The torsion damper of the present invention includes a cylindrical or rod-like base material that can be torsionally deformed, and a positive link and an anti-link connected to the base or anti-link, and each of the positive link and the anti-link is a main arm. The two arms of the same auxiliary arm and the same link may be connected to each other at a position apart from the base material connection position on the arm.

The torsional damper of the present invention is a substrate in which two or more cylindrical or rod-like divided base materials capable of torsional deformation are arranged in the axial direction. And a main arm of one positive link and a main arm of one anti-link are connected to each of the divided base members. You can also
In this case, two arms adjacent to each other across the joint portion of the divided base member are one of the main arms of the positive link and the other of the main arms of the anti-link, and the main arm connected to the base member. At the position where the main arms at both ends are connected, the main arm of the positive link and the auxiliary arm of the anti-link are connected to the base material at one end, and the main arm of the anti-link and the auxiliary arm of the positive link are connected to the base material at the other end. The two or more main arms and auxiliary arms constituting the same link are connected at a position spaced apart from the base material connection position on the arm.

The torsion damper of the present invention comprises two or more cylindrical or rod-like base materials that can be torsionally deformed, and one or two or more positive links and one or two or more anti-links are connected to each base material. It is, linked by between the substrate and the substrate is positively linked or counterclockwise link, the main arm and the auxiliary arm that constitute the same link, two substrates on arms or one arm interlocking with one base By being connected by a shaft, these arms can be linked to rotation.

  In the torsion damper of the present invention, a cylindrical or rod-like base material capable of torsional deformation can be a carbon steel pipe or a low yield point steel pipe.

  The torsional damper of the present invention may be one in which a fixing member that can be attached to a structure is attached to one or more of an arm interlocking shaft, a base material, a main arm, and an auxiliary arm.

  The torsional damper connecting structure according to the present invention is such that the torsional damper according to any one of claims 1 to 6 is rotatably connected to one of the opposing structures, and the other structure and the torsional damper are free to rotate or The torsional damper is attached between the opposing structures, connected to a rotationally fixed structure.

  The torsional damper coupling structure of the present invention may be one in which two or more torsional dampers according to any one of claims 1 to 6 are attached between the opposing structures.

  In the torsional damper connecting structure of the present invention, the opposing structures are the upper structure and the lower structure of the bridge, and the base axis direction of the torsional damper is the direction perpendicular to the bridge axis, which is substantially the horizontal direction and the bridge axis direction. The torsional damper is mounted between the upper structure and the lower structure of the bridge or between the upper structure and the upper structure of the bridge so that it is in a substantially horizontal direction or a substantially vertical direction. You can also

The torsion damper and the torsion damper coupling structure of the present invention have the following effects.
(1) Since a cylindrical or rod-like base material is used for the damper, it is less likely to buckle than a plate-like material, and a large plastic deformation can be expected.
(2) Since the base material is twisted (applying rotational force) with a link composed of two or more arms, bending and shearing force are hardly generated, and the twist can be efficiently transmitted to the base material.
(3) Since it is composed of a base material and two or more links, it is possible to follow deformation in two directions of structural deformation (for example, in the case of a bridge, the direction of the bridge axis and the direction perpendicular to the bridge axis).
(4) Since the link angle between the link, the link size, shape and material, the substrate size, shape and material can be freely selected, the resistance force and deformation amount can be set flexibly.
(5) Since the structure is simple, production, installation work and maintenance are easy, and the cost can be reduced.

The perspective view of the torsional damper of this invention. The side view of the torsional damper of this invention. The top view of the torsional damper of this invention. (A) is explanatory drawing when the connection of an auxiliary arm and a main arm is made into a bolt type, (b) is explanatory drawing when the connection between an auxiliary arm and a main arm is made into a shear key type. The torsional damper connection structure figure which attached the torsional damper of this invention to the structure. The torsional damper connection structure figure which arrange | positioned the torsional damper of this invention in the vertical surface, and was attached between the upper structure and the lower structure. The torsional damper connection structure figure which arrange | positioned the torsional damper of this invention in a horizontal surface, and was attached between the upper structure and the lower structure. The torsional damper connection structure figure which arrange | positioned the torsional damper of this invention in the vertical surface, and was attached between upper structures. The torsional damper connection structure figure which arrange | positioned the torsional damper of this invention in the horizontal surface, and was attached between upper structures. The torsion damper connection structure figure which attached to the structure the both ends of the torsion damper of this invention free to rotate. The torsional damper connection structure figure which attached the both ends of the torsional damper of this invention to a structure by making one rotation free and the other rotationally fixed. The side view of the torsional damper of this invention made into the link by overlapping three arms in the base-material axial direction. The top view of the torsional damper of this invention which connected three links in series. The top view of the torsion damper of this invention which connected four links so that it might become a rectangle. The top view of the torsional damper of this invention from which the length of the arm which comprises the link on either side differs. Explanatory drawing explaining the effect | action of the conventional damper. Explanatory drawing explaining respond | corresponding to the force of one direction when the conventional damper is attached to a structure.

(Embodiment 1)
One embodiment of the torsion damper and torsion damper connecting structure of the present invention will be described with reference to FIGS.
1 is a perspective view of a torsional damper 1 of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.
As shown in FIG. 1, the torsional damper 1 has two links connected to the left and right of the base 2. Although a steel pipe can be used for the base material 2, the material is not limited to a steel material, and any material can be used as long as it causes plastic deformation by twisting such as resin. Further, the steel material is not limited to ordinary carbon steel, and a low yield point steel material having a large plastic deformation amount can also be used.
The shape of the base material 2 is not limited to a tubular shape such as a steel pipe, but may be a solid cylindrical shape or a rod shape, and the cross-sectional shape may be any shape such as a circle, an ellipse, a rectangle, or a polygon. A shape that easily generates torsion when a rotational force is applied is preferable.

  A right link 3 (right side in FIG. 2) and a left link 4 (left side in FIG. 2) are connected to the base material 2 in a direction substantially perpendicular to the axis C of the base material 2. Further, as shown in FIG. 3, the right link 3 and the left link 4 extend radially from the base material 2, respectively, and the right link 3 and the left link 4 have an included angle θ. The included angle θ is necessary for twisting the base material 2 and is preferably 0 ° <θ <180 °, and more preferably 60 ° <θ <120 ° in order to further increase the effect of the damper. desirable.

The right link 3 is composed of a main arm 5 and an auxiliary arm 6, and similarly the left link 4 is composed of an auxiliary arm 7 and a main arm 8. In FIG. 1 to FIG. 3, these arms have a plate-like shape that is horizontally long and thin, but can be any shape such as a thick, rod-like, or not horizontally long.
The main arm 5 of the right link 3 and the auxiliary arm 7 of the left link 4 are connected by overlapping both arms at a joint 9 located at the upper end of the base material 2. In FIG. 2, the auxiliary arm 7 is superimposed on the main arm 5 at the joint portion 9. However, a gap is provided between the main arm 5 and the auxiliary arm 7 (in the axial direction of the base material 2) to prevent the auxiliary arm 7. A rust material, a buffer material, or a lubricant (a material that smoothly promotes the rotation of the auxiliary arm) can be interposed.

  The main arm 5 of the right link 3 is connected to the base material 2 so that rotation around the axis C (rotation with the axis C of the base material 2 as the rotation axis) is restricted at the joint 9. For this connection method, means such as welding can be adopted, but as long as rotation is constrained, the other directions (the axial direction and the axial direction of the base material 2) do not have to be constrained, and the connection means also It is not limited to welding.

The auxiliary arm 7 of the left link 4 is connected to the base material 2 so as to freely rotate around the axis C at the joint 9. In this connection method, as shown in FIG. 4A, a predetermined hole is provided at each end of the auxiliary arm 7 and the main arm 5, and a bolt type for inserting the bolt 11 into these holes or a pin type for inserting a pin. Can be adopted. In this case, it is desirable to fix the auxiliary arm 7 with the nut 12 and the washer 13 so that the auxiliary arm 7 does not come off from the bolt 11, and it is desirable to provide the same drop prevention in the case of a pin type.
Further, as a method for connecting the auxiliary arm 7 in the joint portion 9, a shear key method can be adopted as shown in FIG. That is, a cylindrical protrusion 14 is provided above the main arm 5 to provide a predetermined hole in the protrusion 14, and a hole is provided at the tip of the auxiliary arm 7 to allow the protrusion 14 to be inserted. With the projection 14 fitted into the tip hole, the shear key 15 is fitted into the hole of the projection 14. Thereby, the auxiliary arm 7 is connected to the main arm 5 so as to freely rotate, and the main arm 5 and the base material 2 are connected so as to restrain the rotation, so that the auxiliary arm 7 is also connected to the base material 2 so as to freely rotate. .

  The auxiliary arm 6 of the right link 3 and the main arm 8 of the left link 4 are connected by overlapping both arms at a joint 10 located at the lower end of the base 2. In FIG. 2, the auxiliary arm 6 is superimposed below the main arm 8 at the joint 10, but a rust is prevented by providing a gap between the main arm 8 and the auxiliary arm 6 (in the axial direction of the base material 2). A material, a buffer material, a lubricant, or the like can be interposed.

  The main arm 8 of the left link 4 extends from the base material 2 in the same direction as the auxiliary arm 7 in the same link (left link 4). Further, the main arm 8 is connected to the base material 2 at the joint 10 so that the rotation around the axis C is restrained by welding or the like, like the main arm 5 of the right link 3 at the joint 9. Yes.

  The auxiliary arm 6 of the right link 3 extends in the same direction as the main arm 5 in the same link (right link 3) starting from the base material 2. Further, the auxiliary arm 6 can freely rotate around the axis C at the joint 10 by a bolt type, a pin type, a shear key method, or the like, like the auxiliary arm 7 of the left link 4 at the joint 9. Are connected to the base material 2.

  As shown in FIG. 2, the main arm 5 and the auxiliary arm 6 that are vertically opposed to each other in the right link 3 are located at positions different from the connection portion 9 (positions that are spaced apart from the connection portion 9). 16 are connected. Accordingly, when a force for rotating the main arm 5 around the axis C (rotational force FR in FIG. 5) is applied, a force similar to the rotational force FR acts on the auxiliary arm 6 accordingly, The auxiliary arm 6 tries to rotate around the axis C in conjunction with it. Similarly, when the rotational force FR acts on the auxiliary arm 6, the main arm 5 and the auxiliary arm 6 try to rotate around the axis C in conjunction with each other.

  Similarly, the main arm 8 and the auxiliary arm 7 that are vertically opposed to each other in the left link 4 are located at positions different from the connecting portion 9 (positions that are spaced apart from the connecting portion 9), similarly to the right link 3. It is connected by an arm interlocking shaft 16. Thus, when the rotational force around the axis C (rotational force FL in FIG. 5) acts on either the main arm 8 or the auxiliary arm 7 (the same applies in both cases), the main arm 8 or the auxiliary arm 7 It tries to rotate around the axis C in conjunction.

  In addition, the connection between the arm interlocking shaft 16 and the main arm 5 and the auxiliary arm 6 and the connection between the arm interlocking shaft 16 and the main arm 8 and the auxiliary arm 7 may be a pin connection, a bolt connection or a connection by welding. You can also.

  As shown in FIG. 5, the torsional damper 1 is provided with a fixing member 18 for attaching to the structure 17. The fixing member 18 may be a conventional one such as a steel bracket having bolts and bolt holes for attachment to the structure 17. The fixing member 18 is attached to the torsion damper 1 so as to be freely rotatable or rotationally fixed by pin coupling with the arm interlocking shaft 16, welding and fixing directly to the arm, or bolt fixing via other jigs.

(Operation of Embodiment 1)
Based on FIG. 5, the operation when the torsional damper 1 is connected to the structure 17 will be described.
When the torsional damper 1 attached to the structure 17 receives an earthquake horizontal force in the direction of arrow a or b, the right link 3 and the left link 4 receive a rotational force. That is, when the right link 3 receives an earthquake force in the direction of arrow a, it receives a counterclockwise rotational force FR, and when it receives an earthquake force in the direction of arrow b, it receives a clockwise rotational force FR. Similarly, when the left link 4 receives an earthquake force in the direction of arrow a, it receives a counterclockwise rotational force FL, and when it receives an earthquake force in the direction of arrow b, it receives a clockwise rotation force FL.

  As described above, when the two structures 17 to which the torsional damper 1 is attached swing in different directions (for example, one is in the direction of arrow a and the other is in the direction of arrow b) due to a difference in natural frequency, the right link 3 and the left link 4 receive rotational forces FR and FL in different directions (clockwise and counterclockwise).

When the right link 3 receives the clockwise rotational force FR, the main arm 5 and the auxiliary arm 6 also receive the rotational force FR in the same direction, and both the arms try to rotate in the same direction, but the main arm 5 Transmits the rotational force FR to the base material 2, whereas the auxiliary arm 6 that is rotatably connected does not transmit the rotational force FR to the base material 2.
Similarly, when the left link 4 receives a counterclockwise rotational force FL, the main arm 8 and the auxiliary arm 7 also receive the rotational force FL in the same direction, and both arms try to rotate in the same direction in conjunction with each other. While the main arm 8 transmits the rotational force FL to the base material 2, the auxiliary arm 7 that is rotatably connected does not transmit the rotational force FL to the base material 2.

  That is, the main arm 5 of the right link 3 tries to rotate the base material 2 clockwise at the joint 9 (upper end of FIG. 2), and the main arm 8 of the left link 4 is connected to the joint 10 (lower end of FIG. 2). Part) to rotate the substrate 2 counterclockwise. Thus, twisting occurs in the base material 2 by applying the rotational forces FR and FL in two different directions (clockwise and counterclockwise) at two locations separated in the axial direction of the base material 2.

  At this time, the main arm 5 and the auxiliary arm 6 of the right link 3 try to rotate in conjunction with each other by the effect of the arm interlocking shaft 16 (so that the auxiliary arm 6 is attached to the main arm 5). The arm 8 and the auxiliary arm 7 try to rotate in conjunction with each other by the effect of the arm interlocking shaft 16 (so that the auxiliary arm 7 is attached to the main arm 8). Conventionally, since the base 2 is rotated only by the main arms 5 and 8 at both ends, bending or shearing force is generated in the base 2, but in the torsional damper 1 of the present invention, the auxiliary arm 6 (7 ) Suppresses the bending of the base material 2 and also suppresses the shearing force to the base material 2 by canceling the forces of both the main arm 5 and the auxiliary arm 7 (the main arm 8 and the auxiliary arm 6). The links 3 and 4 can efficiently convert an external force received from the structure 17 into a rotational force.

(Usage example of Embodiment 1)
6-9 is a figure which shows the torsional damper connection structure which attached the torsional damper 1 of this invention to the upper structure and lower part structure of a bridge as an example of a structure.
In FIG. 6, the torsional damper 1 is attached between the upper structure 19 such as a bridge girder and the lower structure 20 such as an abutment or an abutment, and the axial direction of the base material 2 is perpendicular to the bridge axis. Therefore, it is arranged so as to be in the horizontal direction (that is, the direction in which the arm is a vertical plane in the bridge axis direction). In this case, the torsion damper 1 can absorb energy by converting the relative displacement of the upper structure 19 and the lower structure 20 in the bridge axis direction to the torsion of the base material 2. It can also handle relative displacement in the direction.

  7, the torsion damper 1 is attached between the upper structure 19 and the lower structure 20, but unlike FIG. 6, the attachment direction of the torsion damper 1 is the vertical direction of the base 2 (ie, the arm Is a horizontal plane in the direction of the bridge axis). In this case, the torsion damper 1 can absorb energy by converting the relative displacement of the upper structure 19 and the lower structure 20 in the direction of the bridge axis into the torsion of the base material 2, so that the bridge between the upper structure 19 and the lower structure 20 can be absorbed. Relative displacement in the direction perpendicular to the axis can also be handled.

  In FIG. 8, the torsional damper 1 is attached between the upper structure 19 and the upper structure 19. The torsional damper 1 is attached in the horizontal direction (that is, the arm is perpendicular to the bridge axis perpendicular to the base 2). It is arrange | positioned so that it may become a perpendicular | vertical surface of a bridge axis direction. In this case, the torsion damper 1 can absorb the energy by converting the relative displacement in the bridge axis direction of the upper structures 19 to the torsion of the base material 2, and can also absorb the relative displacement in the vertical direction of the upper structures 19. Can respond.

  9, the torsional damper 1 is attached between the upper structure 19 and the upper structure 19, but unlike FIG. 8, the axial direction of the base material 2 is the vertical direction of the torsional damper 1 (that is, the arm Is a horizontal plane in the direction of the bridge axis). In this case, the torsion damper 1 can absorb the energy by converting the relative displacement in the bridge axis direction of both upper structures 19 to the torsion of the base material 2. It can cope with displacement.

The torsional damper 1 is provided between the upper structure 19 and the lower structure 20, or between the upper structure 19 and the upper structure 19, where the axial direction of the base material 2 is the bridge axis direction and the horizontal direction (that is, the arm is the bridge axis). It can also be attached in such an arrangement as to be a vertical plane in a perpendicular direction.
In this case, the torsion damper 1 can absorb energy by converting the relative displacement of the upper structure 19 and the lower structure 20 (or the upper structure 19 and the upper structure 19) in the direction perpendicular to the bridge axis to the torsion of the base material 2. Yes, it is possible to cope with the vertical relative displacement of the upper structure 19 and the lower structure 20 (or the upper structure 19 and the upper structure 19).

  As shown in FIG. 10, the torsional damper 1 can be freely attached to both structures 17 such as a pin connection. In this case, energy can be absorbed by converting the relative displacement into the torsion of the substrate 2 corresponding to the arrow direction shown in the figure.

  As shown in FIG. 11, the torsion damper 1 can be attached to one structure 17 so as to freely rotate, such as pin coupling, and can be attached to the other structure 17 so as to restrain the rotation. In this case, energy can be absorbed by converting the relative displacement into the twist of the base material 2 corresponding to the direction of the arrow 2 shown in the figure.

(Embodiment 2)
Another embodiment of the torsional damper and the torsional damper coupling structure of the present invention will be described with reference to FIG. This embodiment is an embodiment for explaining a torsion damper in which each of the right link 3 and the left link 4 is composed of three arms, and the basic procedure is the same as that of the first embodiment. Here, the torsional damper in which each of the right link 3 and the left link 4 is composed of three arms is described, but the basic structure is the same when it is composed of four or more arms.

Similarly to the first embodiment, the torsional damper shown in FIG. 12 includes a base material 2, a right link 3, and a left link 4.
The base material 2 is obtained by superposing and joining the divided base material 2a on the upper stage and the divided base material 2a on the lower stage. The right link 3 is composed of three arms, and the left link 4 is also composed of three arms.

The main arm 5 of the right link 3 is connected to the divided base material 2a at the upper end so that the rotation around the axis C (FIG. 2) of the base material 2 is constrained, and the left link at the lower end. The four main arms 8 are connected to the base material 2 so that the rotation around the axis C is restrained.
Similarly to the divided substrate 2a, the divided substrate 2b is connected to the substrate 2 so that the main arm 5 of the right link 3 is constrained to rotate around the axis C at the upper end, and the left link 4 is arranged at the lower end. The main arm 8 is connected to the base material 2 so that the rotation around the axis C is restricted.

  At the place where the divided base material 2a and the divided base material 2b are abutted and joined (joined place 2c), the two divided base materials 2a and 2b are joined so that the rotation around the axis C is relatively free. The As this joining method, a method of directly joining the divided base material 2a and the divided base material 2b by a bolt form or a pin form, or the like, the main arm 8 of the divided base material 2a and the main arm 5 of the divided base material 2b can be freely rotated. There are a method of joining so that the main arm 8 and the divided base material 2b of the divided base material 2a, or a method of joining the divided base material 2a and the main arm 5 of the divided base material 2b so as to be freely rotatable. Since the divided base material 2a and the main arm 8, and the divided base material 2b and the main arm 5 are connected so as to restrain the rotation around the axis C, the main arm 8 and the divided base material 2b of the divided base material 2a are connected. Even if the main arm 5 and the main arm 8 are freely joined to each other (the main arm 5 of the divided base material 2a and the divided base material 2b), the divided base material 2a and the divided base material 2b are, as a result, axes It is joined so that the rotation around the core C is relatively free.

In FIG. 12, the main arm 8 of the divided substrate 2a and the main arm 5 of the divided substrate 2b are overlapped in the axial direction of the substrate 2 at the joining location 2c, and the divided substrate 2a and the divided substrate 2b are joined. However, the split base material 2a and the split base material 2b may be joined with a gap between the main arm 8 and the main arm 5 so that a rust preventive material or the like is interposed (approached). .
In FIG. 12, the divisions 2a and 2b have substantially the same dimensions and shapes, but the shapes, dimensions, and materials may be different.

  At the position where the main arm 5 connected to the uppermost stage of the base material 2 (the main arm 5 of the right link 3 connected to the divided base material 2a) is connected, the auxiliary arm 7 of the left link 4 It is connected with the base material 2 so that the rotation around the axis C (FIG. 2) is free. Similarly, at the position where the main arm 8 connected to the lowermost stage of the base material 2 (the main arm 8 of the left link 4 connected to the divided base material 2b) is connected, the auxiliary arm 6 of the right link 3 is pivoted. It is connected with the base material 2 so that the rotation around the core C is free.

  The main arm 5 of the right link 3 and the auxiliary arm 7 of the left link 4 are connected by overlapping both arms at the upper end of the substrate 2a. In FIG. 12, the auxiliary arm 7 is superimposed on the main arm 5, but a rust preventive material or cushioning material is provided with a gap between the main arm 5 and the auxiliary arm 7 (in the axial direction of the base material 2). Alternatively, a lubricant or the like can be interposed.

  Similarly, the auxiliary arm 6 of the right link 3 and the main arm 8 of the left link 4 are connected by overlapping both arms at the lower end of the substrate 2b. In FIG. 12, the auxiliary arm 6 is stacked under the main arm 8, but a rust preventive material and a buffer material are provided with a gap between the main arm 8 and the auxiliary arm 6 (in the axial direction of the base material 2). Alternatively, a lubricant or the like can be interposed.

  The main arm 5, the main arm 5, and the auxiliary arm 6 that are vertically opposed to each other in the right link 3 are connected by an arm interlocking shaft 16 at a position spaced apart from the base material 2. Similarly, the auxiliary arm 7, the main arm 8, and the main arm 8 that are vertically opposed to each other in the left link 4 are connected by the arm interlocking shaft 16 at a position spaced apart from the base material 2.

  The number of arms constituting the link may be four or more. In this case, when the number of arms is n, n-1 divided links are overlapped to constitute the base material 2. At each joint location where the divided links are joined, the main arm 5 of the right link 3 and the main arm 8 of the left link 4 are adjacent to each other with the joint location interposed therebetween. Referring to FIG. 12, the main arms 5 and 8 are provided at n−1 locations, the auxiliary arms 6 and 7 are provided at 1 location, and the joint locations 2c are provided at n−1 locations. 3 and the main arm 8 of the left link 4 are connected to each other.

The operation of the torsional damper shown in FIG. 12 will be described based on the drawings.
When the opposite rotational force (around the shaft core c) acts on the right link 3 and the left link 4, the split base materials 2 a and 2 b are twisted. That is, the divided base material 2a is twisted by the main arm 5 at the uppermost stage of the right link and the middle main arm 8 of the left link 4, and the divided base material 2b is at the lowermost stage of the main arm 5 and the left link 4 at the middle stage of the right link. Torsion is applied by the main arm 8. When torsion is applied to the divided substrate 2a, the middle main arm 5 and the auxiliary arm 6 serve as an auxiliary arm for the right link 3, and the lowermost main arm 8 and the auxiliary arm 7 serve as an auxiliary arm for the left link 4. have. Similarly, when torsion is applied to the divided base 2b, the uppermost main arm 5 and auxiliary arm 6 serve as auxiliary arms for the right link 3, and the middle main arm 8 and auxiliary arm 7 serve as auxiliary for the left link 4. Has the role of an arm.

(Other embodiments)
Other embodiments of the torsional damper and the torsional damper coupling structure of the present invention will be described. This embodiment is an embodiment for explaining other damper shapes, and the basic procedure is common to the first and second embodiments.
The torsional damper shown in FIG. 13 has a central link 21 connected between two base materials 2 and end links 22 connected to the respective base materials 2. The end link 22 is connected to the arm in the link by the arm interlocking shaft 16 at the end not connected to the base material 2. The link configuration and arm connection means are the same as those in the first or second embodiment.
The torsional damper shown in FIG. 13 has an end arm 22, a central arm 21, and an end arm 22 connected in series, but the torsional damper has an end arm 22 and two or more central arms 21 connected in series. It is good.

  In the torsional damper shown in FIG. 14, four ring links 23 are connected in a ring shape, and each ring link 23 is connected to the base member 2 and the arm interlocking shaft 16 at both ends. A combination of the annular torsional dampers may be used. In this case, the end of the ring link 23 that connects the annular torsional dampers may be the base material 2. Thus, not only the case where two links are connected to one base material 2, but also three or more links can be connected.

  The torsional damper shown in FIG. 15 is an example in which the lengths of the two links connected to the base material 2 are different, but not only the length but also the shape may be changed, or the material may be changed. Furthermore, the torsion damper shown in FIGS. 13 to 15 can be used in various combinations.

  The torsional damper and the torsional damper connecting structure of the present invention are not limited to the upper structure and the lower structure of the bridge, and can be applied between various structures such as a building structure such as a building.

DESCRIPTION OF SYMBOLS 1 Torsional damper 2 Base material 2a Split base material 2b Split base material 2c Joint location 3 Right link 4 Left link 5 Main arm (of right link) 6 Auxiliary arm 7 (of right link) Auxiliary arm 8 (left link) Main arm 9 of link 9 Joint of top 10 Joint of bottom 11 Bolt 12 Nut 13 Washer 14 Protrusion 15 Shear key 16 Arm interlocking shaft 17 Structure 18 Fixing member 19 Upper structure 20 Lower structure 21 Central link 22 End link 23 Ring link

Claims (9)

A damper that is installed between opposing structures and absorbs energy by causing shear plastic deformation due to torsion,
A cylindrical or rod-like base material capable of torsional deformation;
A positive link capable of acting on a predetermined position of the base material with a rotational force having the base axis as a substantially rotational axis;
An anti-link that can act on a rotational force opposite to the rotational force at a position spaced apart from the rotational force acting position of the positive link in the base axis direction;
The positive link has a main arm that is connected to the base material in a rotationally fixed manner at a rotational force acting position by the positive link, and an auxiliary arm that is connected to the base material so as to freely rotate.
The anti-link has a main arm that is connected to the base material in a rotationally fixed manner at a rotational force acting position by the anti-link, and an auxiliary arm that is rotatably connected to the base material,
The auxiliary arm of the positive link is overlapped with or close to the main arm of the anti-link and is connected to the base material,
The auxiliary arm of the anti-link overlaps or approaches the main arm of the positive link in the axial direction of the base material and is connected to the base material.
The main arm and auxiliary arm of the positive link are interlocked with the rotation by being connected at a predetermined position different from the base material connection position on the arm,
The torsional damper characterized in that the main arm and the auxiliary arm of the anti-link are interlocked with the rotation by being connected at a predetermined position different from the base material connecting position on the arm. The torsional damper according to claim 1,
A cylindrical or rod-like base material capable of torsional deformation, and a positive link and an anti-link connected thereto,
The positive link and the anti-link are each composed of two arms, one main arm and one auxiliary arm,
The torsion damper characterized by two arms which comprise the same link being connected in the predetermined position on an arm. The torsional damper according to claim 1,
The base material is a cylindrical or rod-shaped split base material that can be torsionally deformed, and two or more split base materials are arranged in the axial direction. Is joined to be free,
A main arm of one positive link and a main arm of one anti-link are connected to each of the divided substrates,
Two arms adjacent to each other across the joint portion of the divided base, one is the main arm of the positive link, the other is the main arm of the anti-link,
At the position where the main arms at both ends of the main arm connected to the base material are connected, the main arm of the positive link and the auxiliary arm of the anti-link are connected to the base material at one end and the main arm of the anti-link at the other end. And the positive link auxiliary arm is connected to the base material,
The torsion damper characterized by two arms which comprise the same link being connected in the predetermined position on an arm. The torsional damper according to any one of claims 1 to 3,
Two or more cylindrical or rod-like base materials capable of torsional deformation are provided,
To each base material, one or two or more positive links and one or two or more anti-links are connected, and the base material and the base material are connected by a positive link or anti-link,
Two or more arms composing the same link are linked to each other by rotating two bases or one base and one arm interlocking shaft at a predetermined position on the arm. A torsional damper characterized by The torsional damper according to any one of claims 1 to 4,
A torsion damper characterized in that the cylindrical or rod-like base material capable of torsional deformation is a carbon steel pipe or a low yield point steel pipe. The torsional damper according to any one of claims 1 to 5,
A torsion damper characterized in that a fixing member that can be attached to a structure is attached to one or more of an arm interlocking shaft, a base material, a main arm, and an auxiliary arm. The torsional damper according to any one of claims 1 to 6, wherein the torsional damper is connected to one opposing structure so as to be freely rotatable, and the other structure and the torsional damper are connected to be freely rotatable or rotationally fixed.
A torsion damper coupling structure, wherein the torsion damper is attached between the opposing structures. The torsional damper coupling structure according to claim 7,
A torsional damper coupling structure, wherein two or more torsional dampers according to any one of claims 1 to 6 are attached between the opposing structures. In the torsional damper connecting structure according to claim 7 or 8,
The opposing structures are the superstructure and substructure of the bridge,
The base axis direction of the torsional damper is the direction perpendicular to the bridge axis and substantially horizontal, the bridge axis direction is substantially horizontal, or substantially vertical,
A torsion damper connecting structure, wherein the torsion damper is attached between an upper structure and a lower structure of a bridge or between an upper structure and an upper structure of a bridge.

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