JP2562320Y2 - Energy absorber for structures - Google Patents

Description

[Detailed description of the invention] a. Purpose of the invention [Industrial application field] This invention relates to a so-called energy absorbing device for structures that absorbs periodic energy such as earthquakes acting on structures such as buildings and pipes. The present invention relates to an energy absorbing device that utilizes an energy absorbing effect caused by shear deformation of a material.

[Conventional technology]

As an energy absorbing device interposed in a structure in which tension and compression alternately occur, the present applicant has previously published
No. 62-31145 (hereinafter referred to as prior art) has been proposed.

According to the prior art, a rotating plate and four link bars and a resistor which are rotatably pivoted around the pin axis by pins at each end to form a four-bar chain are formed,
The resistor is composed of a combination of a high-viscosity substance and an elastic body, and the high-viscosity substance is filled and arranged in a minute gap between the rotating plates,
The elastic body is arranged at a peripheral portion of the rotary plate between them.

Then, the rotating plates are rotated in opposite directions through the link bar where relative movement occurs between the structures, and the vibration of the structure is absorbed by absorbing the periodic energy due to the shear resistance of the high-viscosity material interposed between the rotating plates. It is about to attenuate.

However, in the above prior art, the viscous shear resistance has a relatively small magnitude per unit area, and if a large resistance is to be obtained, the apparatus becomes large. In addition, high processing accuracy is required to maintain the minute gap. Further, in order to prevent the leakage of the viscous body, close attention must be paid to the sealing property, and therefore, processing time is required.

Further, the elastic body is required to have flexibility in order to exhibit the velocity characteristics of the viscous substance, and is a functional material for sealing the viscous substance filled in the working chamber, rather than exhibiting a resistance function.

[Problems to be solved by the invention]

In view of the above circumstances, an object of the present invention is to provide an energy absorbing device of this type which has a simple structure, can provide a greater resistance, and can maintain a stable performance for a long time. I do.

Another object of the present invention is to achieve effective energy absorption in the rubber elastic body.

B. Configuration of the Invention [Means for Solving the Problems] The energy absorbing device for a structure of the present invention employs the following technical means (configuration) to achieve the above object.

The first main configuration is as described in claim 1,
An energy absorbing device interposed between structures in which tension and compression are alternately generated. The energy absorbing devices are arranged opposite to each other, rotate around a central axis, and have a circular pot-shaped concave portion 11 formed therein. And two disc-shaped rotating bodies 1 forming the working chamber as a cylindrical sealed space with the pot-shaped recessed parts 11 opposed to each other; a metal plastic substance 3 sealed in the working chamber of the rotating body 1; A link mechanism 5 that is linked with the structure and drives the rotating body 1 to rotate in the opposite directions to each other; a connection ring 6 is slidably fitted and held on the outer edge of the rotating body 1 in the circumferential direction; A rubber elastic body 4 having a predetermined thickness and rigidity is fixed along the peripheral wall of the pot-shaped recess 11 of the rotating body 1, and the bottom of the pot-shaped recess 11 of the rotating body 1 faces the working chamber. And the projections 12 are radially projected.

The invention according to claim 1 includes the following first embodiment.

The second configuration is the one according to claim 2,
An energy absorbing device interposed between structures in which tension and compression are alternately generated. The energy absorbing devices are arranged opposite to each other, rotate around a central axis, and have a circular pot-shaped concave portion 11 formed therein. And two disk-shaped rotating bodies 1 forming the working chamber as a cylindrical sealed space in which the pot-shaped recessed parts 11 are opposed to each other; a metal plastic substance 3 sealed in the working chamber of the rotating body 1; ;
A link mechanism 5 for rotating the rotating body 1 in opposite directions to each other in conjunction with the structural portion; and a rotating body 1 having a predetermined thickness rigidly attached to the outer circumference of the rotating body 1 with the rotating body 1 interposed therebetween. A rubber elastic body 4 having a thickness
On the bottom surface of the pot-shaped concave portion 11, convex portions 12A, 12
B, 12C, and 12E are protruded radially.

The device according to the second aspect of the present invention shares a main part with the device according to the first aspect of the invention, that is, the specific device and achieves the same object, and includes the following second, third, and fifth embodiments. .

The third configuration is the one according to claim 3,
An energy absorbing device interposed between structures in which tension and compression alternately occur. The energy absorbing devices are arranged to face each other, rotate around a central axis, and are arranged with a predetermined interval therebetween. Two disk-shaped rotating bodies 1; an operating chamber as a sealed space which is sandwiched between the rotating bodies 1 and adhered and fixed to the outer periphery of the rotating body 1 while maintaining an interval between the rotating bodies 1; A rubber elastic body 4 formed and having rigidity with a predetermined thickness;
A metal-plastic material 3 sealed in the working chamber; and a link mechanism 5 linked to the structure and driving the rotating body 1 to rotate in opposite directions to each other; , The projection height is low, and the elongated projection 12D is radially projected.

The device according to claim 3 has the same main parts as the specific device,
It achieves the same purpose and includes the following fourth embodiment.

[Action]

When a strong periodic energy such as an earthquake motion acts between structures, a tensile displacement and a compressive displacement alternately occur in the structure, and this displacement is converted into a rotational displacement between the rotating bodies 1 via the link mechanism 5. Is done.

Due to the displacement between the rotating bodies 1, the metal plastic material 3 sealed in the working chamber between the rotating bodies 1 is sheared and plastically deformed by the convex portions 12, and the periodic energy is absorbed by energy consumption at this time.

Thus, the relative energy between the structures interlocked with the apparatus, in other words, the seismic motion is absorbed by the action of absorbing the periodic energy.

In the energy absorbing device of the first aspect, the connecting ring 6 guides the rotation of the rotating bodies 1 and restrains the increase of the internal pressure due to the shear plastic deformation of the metallic plastic material in the working chamber. The rubber elastic body 4 effectively restrains the shear deformation of the metal plastic material by its rigidity, and also returns the rotating bodies 1 to their initial positions by their elasticity.

In the energy absorbing device according to claims 2 and 3,
The rubber elastic body 4 guides the rotation of the rotating bodies 1 and restrains the internal pressure from increasing due to the shear plastic deformation of the metallic plastic material in the working chamber. Further, the rotating bodies 1 perform a function of returning to the initial position.

〔Example〕

An embodiment of the energy absorbing device for a structure of the present invention will be described with reference to the drawings.

(First Embodiment) FIGS. 1 to 3 show one embodiment thereof.

The energy absorbing device S includes two opposed rotating bodies 1, a rotating center pin 2 for holding a rotating center of the rotating body 1, a lead body 3 and a rubber elastic body sealed between the rotating bodies 1. 4 and a link mechanism 5 for driving the rotating bodies 1 to rotate in opposite directions to each other. Further, it also includes a connection ring 6 fitted and held on the outside of the rotating body 1.

 Hereinafter, the detailed structure of each part will be described.

The rotator 1 has a disk shape, has a center hole 10 at the center thereof, and is arranged opposite to each other with the center axis of the center hole 10 aligned.

Opposite inner surfaces of the rotator 1 communicate with the center hole 10 and have a circular pot-shaped recess centered on the center hole 10.
11 is recessed. A center hole 10 is formed in the bottom surface 11a of the pot-shaped concave portion 11.
A narrow fan-shaped convex portion 12 protrudes radially from the center.
The height of the convex portion 12 is smaller than the depth of the pot-shaped concave portion 11, and
The width of the projection 12 gradually increases as it reaches the outer diameter direction.

The pot-shaped recesses 11 oppose each other to form a cylindrical working chamber.

Further, a flange 13 is continuously stretched on the outer edge of the rotating body 1 and a connecting ring 6 is fitted to the flange 13. The connecting ring 6 prevents the rotating bodies 1 from rotating in opposite directions. In addition to guiding the sliding, it serves to restrict the interval between the rotating bodies 1. The connecting ring 6 is divided into a plurality of parts in the circumferential direction (two parts in this embodiment), and a joining member is
14 makes it detachable.

The rotation center pin 2 is inserted through a center hole 10 of the rotating body 1 through a sleeve 16. The rotation center pin 2 is composed of a bolt 17 and a nut 18, and the rod of the bolt 17 is inserted through the sleeve 16 and fixed and held by the nut 18.

The lead body 3 and the rubber elastic body 4 are sealed in this working chamber.

That is, the rubber elastic body 4 forming an annular body has a large spring constant (kg / mm), that is, a large spring stiffness, in other words, a degree of deflection with respect to an applied force is small. It is arranged along the peripheral wall portion of the pot-shaped recess 11 of the rotating body 1 facing the rotating body 1 and always maintains the interval between the rotating bodies 1 with its rigidity. The rubber elastic body 4 and the sleeve 16
The lead body 3 is sealed in the gap between the lead member 3 and the lead member 3.

The lead 3 is cast into the working chamber in a molten state (melting point 327.5 ° C.). In the casting process of the apparatus S, the casting is performed by pouring the molten metal from a gate (not shown) provided with the rotating body 1 in a state where the rotating body 1 is assembled, and thereafter, a blind lid (not shown) is provided at the entrance thereof. ). The lead body 3 to be used includes, in addition to pure lead, a lead alloy or a mixture with lead and other substances.

The rubber elastic body 4 takes a mode in which the rubber body 4 is firmly fixed to the rotating body 1 with an adhesive, and seals the lead body 3, but also has a function of returning to the initial position by the elastic restoring force.

As for the link mechanism 5, one face of the rotating body 1
The two link bars 20 and 21 are rotatably pivoted at rotationally symmetric positions with respect to the rotation center pin 2 and in the vicinity of both ends via rotation pins 22 and 23. Similarly, two link bars 25 and 26 are provided on the other surface of the rotating body 1 with rotating pins 27 near both ends in the radial direction so as to be orthogonal to the links 20 and 21 with the rotation center pin 2 interposed therebetween. , 28 so as to be rotatable. These rotating pins 22, 23, 27, 28 are embedded and fixed to the rotating body 1.

The link bars 20, 21, 25, 26 are pivotally connected to each other by pivot pins 30, 31, 32, 33. That is, link bars 20 and 25 are pivot pins 30, link bar 20 and 26 are pivot pins 31, link bar 21 and 25 are pivot pins 32, and link bar 21 And 26 are pivot pins
At 33, each is pivoted.

As described above, the four link bars 20, 21, 25, and 26 form a four-bar chain.

Each of the pivot pins 30 to 33 is composed of a bolt and a nut, and is tightened twice. A sleeve 35 is rotatably fitted around each of the pivot pins 30 to 34, and an additional member 37 is fixedly mounted on the sleeve 35 for coupling with a diagonal member of a structure described later.

FIG. 4 shows the incorporation of this energy absorbing device S into a structural system.

In the figure, a structure K is composed of a column member 40 and a beam member 41, and these joints are connected to each other by diagonal members 43, 44,
5, 46, and the device S is interposed between these diagonal members 43 to 46. That is, the oblique members 43 to 46 are attached to the pivot pins 30 to 33 via the interposition members 37, respectively.

The energy absorbing device S of the present embodiment configured as described above operates as follows with respect to earthquake motion.

That is, the periodic forced vibration caused by the seismic
When this occurs, the vibration is transmitted through the columns 40 and the beams 41 to the diagonal members 4.
The skeleton plane including 3,44,45,46 is deformed, and as a result, tension acts on the diagonal members 43,44 and compressive force acts on the diagonal members 45,46.
Next, a compressive force acts on the oblique members 43 and 44, and a tensile force acts on the oblique members 45 and 46, and this is repeated. The stress received by such a diagonal member deforms the four-node chain of the energy absorbing device, and gives a rotational displacement in the opposite direction to the rotating plate 1 joined to the chain.

Due to the reverse rotation of the rotating plates 1, a relative displacement occurs between the protrusion 12 on the bottom surface of the pot-shaped recess 11 and the lead 3 in the working chamber,
The lead body 3 undergoes shear deformation by the convex portion 12 and is plastically fluidized.

Due to the energy consumption caused by the plastic fluidization, the rotational movement of the rotating body 1 is attenuated, and the movement between the structures is attenuated.

The displacement described above is periodic, and therefore the rotating plate 1
Is a periodic rotational motion, but the periodic motion is rapidly attenuated by energy consumption due to the above-described lead shear deformation.

The connection ring 6 guides the rotation of the rotating bodies 1 and restrains the internal pressure from increasing due to the plastic deformation of the metal plastic material in the working chamber. Further, the rubber elastic body 4 has a large spring constant, effectively restrains the flow deformation of the lead body 3 with its stiffness, and returns the rotating bodies 1 to their initial positions by their elasticity.

According to the present device S, it is possible to suppress the displacement due to the initial elasticity of the lead body with respect to a load that always causes a displacement of the structure K such as a wind or a weak earthquake.

In the energy absorbing device S of the present embodiment, the increase in the internal pressure due to the plastic deformation of the lead body on the rubber elastic body 4 is also shared by the connecting ring 6, and the rigidity can be reduced.

(Second Embodiment) FIGS. 5 and 6 show another embodiment (second embodiment) of the present invention. In the figure, the same reference numerals are given to members equivalent to those in the previous embodiment. Although the illustration of the link mechanism 5 is omitted in the present embodiment, it is similar to the previous embodiment.

This embodiment is characterized in that the connecting link is omitted and the rubber elastic body 4 is used instead. Therefore, the rubber elastic body 4 has a larger spring constant.

FIG. 5 (a) (the CC section is shown in the left half of FIG. 6) shows the depth of the pot-shaped recess 11 and the projection 12
The height of A is the same. The shape of the projection 12A is the same as that of the first embodiment. The elastic rubber body 4 is firmly fixed to the periphery of the rotating body 1 with an adhesive and further by vulcanization bonding. The rotating bodies 1 constitute a working chamber with a predetermined gap therebetween via the elastic rubber body 4, and the lead body 3 is sealed in the working chamber.

FIG. 5 (b) (the cross section taken along the line DD is shown in the left half of FIG. 6) has a configuration in which the convex portion 12B is the pot-like concave portion 1
1 shows an aspect that projects more than the depth of 1. The manner of fixing the elastic rubber body 4 is the same as that described above.

According to this embodiment, the rubber elastic body 4 has an appropriate stiffness and elasticity with a required spring constant, withstands an increase in the internal pressure due to the deformation of the lead body 3 with the stiffness, and has an elasticity restoring force. With this, a return operation to the initial position is performed.

(Third Embodiment) FIGS. 7 and 8 show still another embodiment (third embodiment) of the present invention.

This embodiment is similar to the second embodiment, but is characterized by the shape of the projection.

FIG. 7 (a) (the EE cross section is shown in the left half of FIG. 8) is one in which a concave portion 11A is formed on the inner surface of the rotating body 1 having a flat plate shape.

FIG. 7 (b) (the FF cross section is shown in the right half of FIG. 8) is an individual round shape which is higher than the bottom of the pot-shaped recess 11 in depth. Projection protrusion 12C
Are formed to protrude. In this embodiment, the projections 12C are arranged radially from the center hole of the rotating body 1. However, in addition to the radial arrangement, the projections 12C may be arranged in a staggered manner. Can be taken.

(Fourth Embodiment) FIGS. 9 and 10 show still another embodiment (FIG. 4) of the present invention.
Example) is shown.

This embodiment is characterized in that convex portions are provided on opposing inner surfaces of the flat rotating body 1.

That is, the protruding portions 12D have an elongated shape, are radially protruded from the inner surface of the rotating body 1, and a rubber elastic body 4 having a width sufficiently larger than the height of these protruding portions 12D is provided between the rotating bodies 1. Interposed. The rubber elastic body 4 and the rotating body 1 are integrally fixed by an adhesive, a vulcanizing adhesive or the like. The opposing projections 12D do not protrude significantly in the working chamber,
Its height is about 1/4 of the width of the working chamber and does not bring about large plastic deformation flow resistance.

(Fifth Embodiment) FIG. 11 shows still another embodiment (fifth embodiment).

In this embodiment, a plurality of convex portions 12E are formed so as to protrude at predetermined intervals radially from the bottom surfaces of the pot-shaped concave portions 11 facing each other. The protrusions 12E of one rotating body 1 are arranged in a staggered manner on the protrusions 12E of the other rotating body 1. The convex portion 12E is a pot-shaped concave portion.
It is formed higher than the depth of 11 and utilizes the flow resistance of the lead bodies when they approach each other with the relative rotation of the rotating body 1.

The present invention is not limited to the above embodiment, and various design changes can be made within the basic technical concept of the present invention. That is, the following embodiments are included in the technical scope of the present invention.

In addition to lead, metals such as tin, zinc, aluminum, sodium, and copper, and superplastic alloys such as lead-tin alloy and zinc-aluminum-copper are used as the energy absorber. Furthermore, if lead or the above substances are selected, combinations of two or more of these substances are also possible.

When the above-mentioned substances are used as energy absorbers, these substances are attenuated by energy absorption accompanying plastic fluidization like lead bodies.

C. Effects of the Invention The energy absorbing device for a structure of the present invention has the above-described configuration and has an effect, and thus has the following specific effects.

The device can be miniaturized, and a large energy absorbing property can be obtained, and it can be easily incorporated into a wall structure of a building.

Since the structure is simple, no processing time is required, and therefore, the manufacturing cost can be reduced.

The flow deformation resistance of the metal plastic material filled in the working chamber depends on the magnitude of the external force and does not depend on the speed, so that the spring constant of the rubber elastic body can be increased. I can take the rigidity of the body greatly,
This contributes to downsizing of the device, and a structure with high strength can be obtained.

By appropriately changing the shape and arrangement of the convex portions facing the working chamber, the energy absorption characteristics of the present device can be freely selected, and the degree of freedom in design increases.

[Brief description of the drawings]

The drawings show an embodiment of the energy absorbing device for structures of the present invention, FIG. 1 is a side view of one embodiment (first embodiment),
2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line B of FIG.
-B sectional view, FIG. 4 is a schematic view showing the application of this embodiment to a structure, FIG. 5 is a sectional view according to FIG. 2 of another embodiment (second embodiment), and FIG. FIG. 5 is a sectional view taken along lines CC and DD, FIG. 7 is a sectional view according to FIG. 5 of still another embodiment (third embodiment), and FIG. 8 is an EE of FIG. 9 is a sectional view taken along the line FF of FIG. 9, and FIG. 9 is a sectional view of another embodiment (fourth embodiment).
FIG. 10 is a sectional view according to the figure, FIG. 10 is a sectional view taken along line GG of FIG. 9,
FIG. 11 is a sectional view similar to FIG. 2 of still another embodiment (fifth embodiment). DESCRIPTION OF SYMBOLS 1 ... Rotating body, 2 ... Rotation center pin, 3 ... Metal plastic substance, 4
... Rubber elastic body, 5 ... Link mechanism, 12,12A, 12B, 12C, 12D, 1
2E ... convex

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location F16L 3/16 F16L 3/16 A (56) References JP-A-62-197574 (JP, A) JP-A-62-148776 (JP, A) JP-A-62-110038 (JP, A) JP-A-51-69765 (JP, A) JP-A-56-164245 (JP, A) JP-B-62-31145 (JP, B2) Jikken 34-3018 (JP, Y1)

Claims (4)

(57) [Scope of request for utility model registration] An energy absorbing device interposed between structures in which tension and compression are alternately generated, wherein the energy absorbing devices are arranged to face each other, rotate around a central axis, and have a circular pot shape. Two disc-shaped rotating bodies (1) in which a recess (11) is provided and the pot-shaped recess (11) is opposed to each other to form a working chamber as a cylindrical sealed space; A) a plastic metal material (3) enclosed in the working chamber; and a link mechanism (5) that interlocks with the structure and drives the rotating body (1) to rotate in opposite directions to each other. A connecting ring (6) is slidably fitted and held around the outer edge of (1) in the circumferential direction, and has a predetermined thickness and rigidity along the peripheral wall of the pot-shaped recess (11) of the rotating body (1). A rubber elastic body (4) is fixed, and the bottom surface of the pot-shaped recess (11) of the rotating body (1) faces the working chamber. Projection (12) is formed by projecting radially, the structure for the energy absorbing device, characterized in that. 2. An energy absorbing device interposed between structures in which tension and compression alternately occur, wherein the energy absorbing devices are arranged opposite to each other, rotate around a central axis, and have a circular pot-like shape. Two disc-shaped rotating bodies (1) in which recesses (11) are recessed and the pot-shaped recesses (11) are opposed to each other to form a cylindrical working space as a sealed space; A) a plastic metal material (3) enclosed in the working chamber; and a link mechanism (5) that interlocks with the structure and drives the rotating body (1) to rotate in opposite directions to each other. A rubber elastic body (4) having a predetermined thickness and rigidity is tightly fixed to the outer periphery of the rotating body (1) between the rotating bodies (1). ) Has a projection (12A, 12B, 12C, 12E) radially protruding from the bottom surface facing the working chamber. Energy absorber. 3. An energy absorbing device interposed between structures in which tension and compression alternately occur, wherein the energy absorbing devices are arranged opposite to each other, rotate about a central axis, and maintain a predetermined interval. Two rotating bodies (1) arranged in the form of a disk; and a rotating body (1) sandwiched between the rotating bodies (1) and adhered and fixed to the outer periphery of the rotating body (1), and the rotating bodies (1) A rubber elastic body (4) having a predetermined thickness and rigidity, forming a working chamber as a hermetically sealed space while maintaining an interval between: a metal plastic material (3) sealed in the working chamber; A link mechanism (5) for rotating the rotating body (1) in opposite directions to each other in conjunction with an object; and a surface of the rotating body (1) facing the working chamber and having a low protruding height. Characterized in that an elongated convex portion (12D) is projected radially. . 4. The metal plastic substance is selected from the group consisting of metals such as lead, tin, zinc, aluminum, sodium, and copper, and superplastic alloys such as lead-tin and zinc-aluminum-copper, and two or more of these. The structural energy absorbing device according to any one of claims 1 to 3, comprising the above combination.