JP2006022843A - Damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper capable of coping with vibration in all horizontal directions through approximately 360° even if it is formed of one annular member formed of an elastic material. <P>SOLUTION: In this damper, one end part of the annular member 1 formed of the elastic material is rotatably fixed to one structure 5 and the other end part 2 is rotatably fixed to the other structure 6 through pins, and the entire part of the annular member 1 is formed to be automatically rotatable along the deforming direction thereof. Also, a circumferential angle about the annular member between a pin-connected part 3 at one end part of the annular member 1 and a pin-connected part 4 at the other end part is set slightly smaller than 360°. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damping damper that is interposed between an upper structure and a lower structure and reduces seismic energy transmitted from the ground to the upper structure, such as a seismic isolation bearing device that supports the vertical load of the upper structure. The present invention relates to a damping damper used with a bearing device.

Conventionally, a seismic isolator having a type of damping damper that absorbs energy by elastic-plastic deformation of the damping damper in the seismic isolator when the upper structure and the lower structure move in the horizontal direction due to the earthquake motion is known. It has been. In addition, as a member constituting the elastic-plastic deformable damping material, a form in which both ends of a plurality of annular members made of an elastic-plastic material such as a steel rod are fixed (for example, Patent Documents 1, 2, 3, etc.) is known. It has been.
Japanese Examined Patent Publication No. 4-6835 Japanese Examined Patent Publication No. 2-59262 Japanese Patent Publication No. 4-80184

  In the conventional case, since both ends of the annular member made of an elastoplastic material are firmly fixed with bolts or the like, for example, when one annular member is provided, the elastic member deforms against the stress of elastoplastic deformation of the annular member. There is a direction in the characteristics of the distortion. Therefore, in order to eliminate the directivity characteristic that there is a specific direction as much as possible, an attempt is made to eliminate the directivity as much as possible by providing a large number of annular members at equal angular intervals in the circumferential direction. For example, there is a problem that directional characteristics exist at intervals of 360 ° / N. In addition, if a large number of annular members are provided in this way, the apparatus becomes large and increases installation space and costs.

  The present invention pays attention to the fact that directional characteristics occur when both ends of an annular member made of an elastoplastic material are fixed, and various studies are made on the behavior of the annular member when both ends of the annular member are not fixed. As a result, when both end portions of the annular member are made to be freely rotatable pin joints, it has been found that the annular member itself turns and rotates so as to control the posture, and the present invention has been completed.

The present invention provides a damping damper that can cope with all directions of approximately 360 ° in the horizontal direction by attaching both end portions of an annular member made of an elastic-plastic material so as to rotate freely even with an annular member made of an elastic-plastic material. The purpose is to provide.
In the present invention, the annular member may be a member that is substantially annular as a whole in a plan view, and includes an annular member with an intermediate spiral annular portion having a small-diameter spiral annular portion at an intermediate portion of the annular member.

In the damping damper of the first invention, one end of an annular member made of an elastoplastic material is rotatably attached to one structure and the other end is attached to the other structure by pin joining, and the entire annular member is It is characterized in that the posture can be automatically controlled according to the direction of deformation.
In the second invention, in the damping damper of the first invention, the circumferential angle around the annular member from the pin joint at one end of the annular member to the pin joint at the other end is set slightly smaller than 360 °. It is characterized by being.
In the third invention, in the damping damper of the first invention or the second invention, a pin made of a support shaft is provided on either the end of the annular member or the structure side, and the pin made of the support shaft on the other side. A fitting hole is provided for fitting in a rotatable manner.

  According to the first invention, since both ends of the annular member made of an elastoplastic material are configured to be rotatable by pin joining, respectively, during an earthquake or the like, between one structure and the other structure, When a movement occurs such that each pin joint portion relatively approaches or separates in a plane, the annular member made of an elastic-plastic material not only can absorb and attenuate energy while deforming, Especially in the case of the present invention, since both ends of the annular member are rotatably pin-joined, if a displacement occurs so that the pin joints at both ends approach or separate in a plane, follow this. The entire annular member is automatically rotated in accordance with the direction in which it is deformed, and the posture can be controlled, so that one annular member can be a damping damper capable of dealing with a wide range of horizontal forces. .

  Therefore, the directionality of the distortion characteristic of the damping damper, which was unavoidable with the prior art, can be eliminated, and the damping damper with ideal performance can be provided. Further, since one annular member may be used, the structure of the damping damper is simple, and assembly and installation are easy.

  According to the second invention, since the circumferential angle around the annular member from the pin joint at one end of the annular member to the pin joint at the other end is set slightly smaller than 360 °, In addition to the effect, it is possible to provide a damping damper having an ideal performance capable of accommodating one annular member in all horizontal directions.

  According to the third invention, a pin made of a support shaft is provided at either the end of the annular member or the structure side, and the pin made of the support shaft can be rotated at either the end of the annular member or the structure side. It is possible to attach the end portion of the annular member to the structure side so as to be rotatable only by providing a fitting hole for fitting to the structure.

Next, the present invention will be described in detail based on the illustrated embodiment.
1 to 5 show an embodiment of the present invention, and as shown in FIG. 1 (a), in a side view, a substantially U-shaped spiral annular member 1 is vertically symmetrical. A longitudinal pin insertion hole 2 perpendicular to the lateral center line C <b> 1 of the annular member 1 is provided at the open end 2 of the annular member 1. The annular member 1 is formed by bending an elastic-plastic material such as a steel rod or a strip-shaped steel plate into an annular shape such as a spiral annular shape, and the open end portion 2 is formed in parallel.

  As shown in FIG. 1B, the pin insertion hole 2 is formed at both ends of a spiral annular member 1 that is substantially symmetrical with respect to the front, rear, left, and right center lines C2, C3 in plan view. Is provided.

  The circumferential angle α around the annular member from the center of the pin joint 3 at one end (upper end) of the annular member 1 to the center of the pin joint 4 at the other end (lower end) is set slightly smaller than 360 °. ing.

  In order to rotatably attach the respective end portions of the annular member 1 to the structures 4 and 5 side, the upper and lower structures 5 and 6 have mounting bases 9 each having a pin made of vertically supporting shafts 7 and 8. , 10 are fixed to the structures 4 and 5 by fixing means such as bolts.

  The pin comprising the support shaft 8 installed on the lower structure 5 side is a stepped support shaft, and the lower end portion 2 of the annular member 1 is supported by the step portion 11 formed by the large-diameter shaft portion. 1 is installed at a predetermined position in the vertical direction. The step portion 11 is supported through a metal material such as steel or a synthetic resin material such as an ethylene tetrafluoride plate that causes bottom friction so as to reduce the friction in order to facilitate the rotation of the annular member 1. It is desirable to keep it. It is good also as a structure which prevents the upward movement of the annular member 1 as a support shaft which provided the step part also in the support shaft 7 installed in the upper structure 5 side.

  The pin insertion holes 2 a at the upper and lower ends of the annular member 1 are pin joints that are rotatably fitted to the pins comprising the support shafts 7 and 8, and each of the support members is positioned away from the end 2 of the annular member 1. A nut 12 is screwed into a male thread portion provided at the end portions of the shafts 7 and 8 to prevent the end portion 2 of the annular member 1 from coming out of the support shafts 7 and 8. The pin insertion hole 2a is provided with lubricating oil for reducing friction or the plain bearing is fitted and fixed so that each end 2 of the annular member 1 can be easily rotated with respect to the pin consisting of the support shafts 7 and 8. May be.

  In this embodiment, the end 2 of the annular member 1 is rotatably fitted to the support shafts 7 and 8 fixed to the structures 5 and 6 side. Thus, the end of the annular member 1 can be obtained by simply providing the fitting holes made of the pin insertion holes 2a in the end portions 2 of the annular member 1 and installing the pins made of the support shafts 7 and 8 in the structures 5 and 6, respectively. The part 2 can be pin-coupled to be rotatable, and the damping damper 13 having a simple structure to which the end 2 of the annular member 1 is rotatably attached can be configured. Since one side only needs to be the support shaft 7 (8) and the other is the pin insertion hole 2a, the end portion 2 of the annular member 1 or the support shaft 7 (8) is provided on either the structure 5 or 6 side. A configuration in which a pin is provided and a pin insertion hole 2a that is rotatably fitted to the pin formed of the support shaft 7 (8) may be provided on the other side. Therefore, when carrying out the present invention, although not shown, a pin having a vertical axis is attached to the end 2 of the annular member 1, and the vertical axis can be rotated to a pin insertion hole provided on the structures 5 and 6 side. You may make it fit in.

  When both end portions 2 of the annular member 1 are rotatably pin-joined as described above, when the pin joint portions 3 and 4 are relatively displaced as will be described later, the entire annular member 1 turns as if turning. In order to perform elasto-plastic deformation with movement, it is necessary to secure a rotation space 14 of the annular member 1 between the upper structure 5 and the lower structure 6.

  In the damping damper 13 configured as described above, when a horizontal force acts during an earthquake or the like, one structure 5 (6) is displaced in the lateral direction, and the end 2 of the annular member 1 is displaced. The entire annular member 1 is automatically damped in accordance with the direction in which the ring member 1 is deformed, and becomes a damping damper 13 configured to be capable of posture control. The reason will be described in detail below with reference to FIG. 3 and FIG.

  FIG. 3 is an explanatory view of the rotating operation of the annular member 1 in the damping damper 13 in which both end portions 2 of the annular member 1 of the present invention are rotatably attached to the upper structure 5 and the lower structure 6, respectively. That is, one end 2 of the annular member 1 is rotatably supported by the pin structure fulcrum X on one of the upper structure 5 and the lower structure 6, and the other end 2 of the annular member 1 is It is explanatory drawing of the behavior of the whole cyclic | annular member when the horizontal force P acts when it is supported by the other structure 6 of the upper structure 5 and the lower structure 6 by the pin joint fulcrum Y rotatably. .

When the angle formed between the straight line L connecting the pin joint fulcrums X and Y and the direction P of the force due to the horizontal force is θ, the following behaviors (A) to (D) are shown depending on the angle θ.
(A) In the range of 0 ≦ θ ≦ 90 °, the entire annular member 1 rotates counterclockwise and the annular member spreads monotonously.
(B) In the range of −90 ° ≦ θ ≦ 0 °, the entire annular member 1 rotates clockwise, and the annular member spreads monotonously.
(C) In the range of 90 ° ≦ θ ≦ 180 °, the entire annular member 1 is rotated counterclockwise, and after the deformation, the first end portion 2 of the annular member 1 is deformed in the closing direction. spread.
(D) In the range of −180 ° ≦ θ ≦ −90 °, the entire annular member 1 rotates in the clockwise direction, and after the deformation, the first end portion 2 of the annular member 1 is deformed in the closing direction. Spread.

  The cases (A) to (D) will be described individually with reference to FIGS. 4 and 5. In the case (A), that is, as shown in FIG. When the force indicated by the arrow P is applied to the pin joint fulcrum Y at the other end of the pin joint fulcrum X at the one end 2, the other end pin joint fulcrum Y moves in the direction indicated by the arrow P. In the annular member 1, the center line C <b> 3 of the annular member 1 is substantially located on a perpendicular bisector at the center of the line segment L connecting the fulcrums of the pin joint fulcrums X and Y at both ends. The pin joint fulcrums X and Y are deformed to expand. In FIG. 4B and FIG. 5, the line segment L connecting the fulcrums of the pin joint fulcrums X and Y is shown only in the initial position.

  In the case of (B), that is, as shown in FIG. 4 (b), the force indicated by the arrow P at the other end pin joint fulcrum Y with respect to the pin joint fulcrum X at the one end 2 of the annular member 1. Since the other end pin joint fulcrum Y moves in the direction indicated by the arrow P, the annular member 1 is located on the right bisector at the center of the line segment L connecting the both end pin joint fulcrums X and Y. Then, the both ends 2 of the annular member 1 are deformed so that the center line C3 of the annular member 1 is substantially located.

  In the case of (C), that is, as shown in FIG. 5A, the force indicated by the arrow P at the other end pin joint fulcrum Y with respect to the pin joint fulcrum X at one end of the annular member 1. In the case of acting, after the other end pin joint fulcrum Y moves to approach the pin joint fulcrum X in the direction indicated by the arrow P, the ring of the annular member 1 is deformed in the closing direction. It deform | transforms so that the both ends of the annular member 1 may spread. In either case where the two end portions 2 of the annular member 1 approach each other and are deformed in the direction in which the ring is closed in a plan view, or both end portions 2 of the annular member 1 are deformed so as to expand, the annular member 1 is The center line C3 of the annular member 1 is deformed so that the center line C3 of the annular member 1 is substantially located on the perpendicular bisector at the center of the line segment L connecting the partial pin joint fulcrums X and Y.

  In the case of (D), that is, as shown in FIG. 5B, the force indicated by the arrow P at the other end pin joint fulcrum Y is applied to the pin joint fulcrum X at one end of the annular member 1. In the case of acting, after the other end pin joint fulcrum Y moves to approach the pin joint fulcrum X in the direction indicated by the arrow P, the ring of the annular member 1 is deformed in the closing direction. As the other end portion pin joint fulcrum Y moves away from the pin joint fulcrum X, the both end portions 2 of the annular member 1 are deformed so as to expand. In either case where the two end portions 2 of the annular member 1 approach each other and are deformed in the direction in which the ring is closed in a plan view, or both end portions 2 of the annular member 1 are deformed so as to expand, the annular member 1 is The center line C3 of the annular member 1 is deformed so as to be substantially located on the perpendicular bisector at the center of the line segment L connecting the pin joint fulcrums X and Y of the portion 2.

  As described above, in the damping damper 13 of the present invention, the horizontal force P acts on the pin joint portions 3 and 4 of the damping damper 13 during an earthquake or the like, and one of the structures 5 and 6 is displaced in the lateral direction. When the end 2 of the annular member 1 is displaced, except for the case of the horizontal force P passing through the line segment connecting the pin joint fulcrum X and the pin joint fulcrum Y, the annular member with respect to the force P in almost all directions of 360 ° 1 rotates around the pin joint fulcrum X (or pin joint fulcrum Y), and the ring member 1 is deformed in a substantially expanding direction, and the ring member 1 connects the pin joint fulcrums X and Y at both ends. The center line C3 of the annular member 1 is deformed so that the center line C3 of the annular member 1 is positioned on the perpendicular bisector at the center of the line segment L. And a damping damper 13 configured to be pivotable and capable of posture control That.

  In addition, in the said embodiment, the circumference angle around the annular member from the pin junction part 3 of the one end part of the annular member 1 to the pin junction part 4 of the other end part is set slightly smaller than 360 degrees, and an initial shape is set. Thus, the deformation behavior of the annular member 1 is such that the circumferential angle around the annular member from the pin joint 3 (4) at one end 2 of the annular member 1 to the pin joint 4 (3) at the other end is 360 °. It is possible to make sure that the deformation behavior always spreads more reliably than the case where the deformation behavior is achieved. When the circumferential angle around the annular member from the pin joint at one end of the annular member 1 to the pin joint at the other end is 360 °, that is, the pin joints at both ends of the annular member 1 are on the same vertical center line. When the horizontal displacement of the pin joints 3 and 4 occurs, whether the other pin joint fulcrum Y passes the front or the rear side with respect to one pin joint fulcrum X in plan view It is not clear, in other words, with respect to the direction P of the force, whether the deformation behavior is any of FIGS. 4 (a) and 4 (b) or FIGS. 5 (a) and 5 (b). Since it is not clear whether the deformation is to be expanded or to be closed, and the behavior becomes two ways, the circumferential angle is made slightly smaller than 360 ° to eliminate the above point.

  When practicing the present invention, as shown in FIG. 6, a plurality of annular members 1 are arranged substantially concentrically in a side view so as to share pin joints 3 and 4, and one end portion 2 of each annular member 1. May be rotatably attached to the same one support shaft 7, and the other end 2 of each annular member 1 may be rotatably attached to the same other support shaft 8. Thus, if the some annular member 1 is arrange | positioned concentrically by side view, an attenuation | damping damper with high attenuation | damping performance can be comprised. When the annular member 1 is arranged concentrically in a side view, a plurality of annular members 1 are arranged in parallel. Whether each annular member 1 is made of an elastic-plastic material having the same rigidity or an elastic-plastic material having a different rigidity is appropriately determined depending on the design. Since other configurations are the same as those of the above-described embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  Moreover, when implementing this invention, as shown in FIG. 7, it is good also as the cyclic | annular member 1 which has the helical cyclic | annular part 15 in an intermediate part. When the spiral annular portion 15 is provided in the middle portion of the single annular member 1 in this manner, the rigidity of the annular member 1 can be reduced, and therefore the damping damper 13 having a small damping performance can be configured. When the spiral annular portion 15 is provided in the middle portion of the single annular member 1, there is an effect obtained by arranging the plurality of annular members 1 in series. Since other configurations are the same as those of the above-described embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  Furthermore, when implementing this invention, the cross-sectional shape of the cyclic | annular member 1 may be circular, an ellipse, a rectangle, etc., polygonal shape, and other cross-sectional shapes. Further, the planar shape of the annular member 1 may be an elliptical annular shape, a rectangular annular shape, a polygonal annular shape or other annular shapes other than the illustrated annular shape.

BRIEF DESCRIPTION OF THE DRAWINGS The damping damper of embodiment of this invention is shown, Comprising: (a) is a side view, (b) is the sectional view on the AA line of (a). It is a partially expanded vertical side view of Fig.1 (a). It is explanatory drawing of embodiment. It is explanatory drawing of embodiment. It is explanatory drawing of embodiment. The damping damper of other embodiment is shown, Comprising: (a) is a side view, (b) is the BB sectional drawing of (a). Furthermore, the damping damper of other embodiment is shown, Comprising: (a) is a side view, (b) is CC sectional view taken on the line of (a).

Explanation of symbols

1 Ring member 2 End 3 Pin joint 4 Pin joint 5 Structure (upper part)
6 Structure (lower part)
7 Spindle (pin)
8 Spindle (pin)
9 Pedestal 10 Pedestal 11 Stepped portion 12 Nut 13 Damping damper 14 Rotating space 15 Spiral annular portion C1 Horizontal center line C2 Center line C3 Center line

Claims (3)

  One end of an annular member made of an elastoplastic material is attached to one structure and the other end is rotatably attached to the other structure by pin joining, and the entire annular member is automatically adapted to the direction of deformation. The damping damper is characterized in that it can be controlled in posture.   2. The attenuation according to claim 1, wherein a circumferential angle around the annular member from a pin joint at one end of the annular member to a pin joint at the other end is set to be slightly smaller than 360 °. Damper.   A pin made of a support shaft is provided at either one of the end of the annular member or the structure side, and a fitting hole is provided on the other to be rotatably fitted to the pin made of the support shaft. The damping damper according to claim 1 or 2.

Images