JP3156007B2 - Periodic energy absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic element of a building or a damper element of a machine, a vehicle, etc. for the purpose of absorbing and mitigating periodic energy in which an earthquake input or a force which changes alternately acts on the input. The present invention relates to a device for absorbing periodic energy.

[0002]

2. Description of the Related Art Conventionally, as a vibration control mechanism such as a PCa earthquake-resistant wall or a PCa plate with a steel frame brace which is used for controlling the rolling of a building or improving the earthquake resistance and wind resistance of the building, it has been widely used. In addition to the piston-cylinder type lead damper and the like, there is a vibration damper applied to high-strength bolts described in Japanese Patent Application Laid-Open No. Hei 2-209572, particularly FIGS. 10 and 11. As shown in FIG. 4, the inner plate a and the outer plates b, which sandwich both outer surfaces of the inner plate a are slidably overlapped with each other as shown in FIG. It is tightened.

[0003]

In the above-described vibration damper to which the high-strength bolt is applied, since the inner plate a and the outer plates b, b are directly tightened by the bolt c and the nut d, the axial force of the bolt is reduced. Concentrate on the periphery. As a result, excessive surface pressure is locally generated around the bolt, causing galling, seizing or squeaking noise (noise).
And so on. Another problem is that the magnitude of the axial force of the bolt changes over time due to the sliding of the inner plate a and the outer plate b, and the energy absorption performance (proof strength) decreases. Further, as a result of the sliding between the inner plate a and the outer plate b, there is also a problem that the contact area between the inner plate a and the outer plate b becomes non-uniform due to abrasion, the surface pressure becomes unstable, and a friction noise is generated. It is a problem to be solved.

[0004]

According to a first aspect of the present invention, there is provided a periodic energy absorbing apparatus comprising: an inner plate and an outer plate sandwiching both outer surfaces of the inner plate; manner in which superposed slidably in sliding relationship, the absorber of the periodic energy to which they are entered into for high-strength bolts and nuts, of one of the outer plate and the bolt head, and the other outer plate and the nut In between , each outer plate and a holding plate of a shape and size having a wide contact pressure surface are installed , and between the holding plate and the bolt head and nut
Check that spring washer is interposed and
The contact surface with the outer plate is centered on the position of the bolt.
Part is formed in a non-contact concave part,
To the contact surface of the inner plate and outer plate
A ridge that limits the contact area of the
On at least one of the outer plates and on the plate
It is formed in the moving direction, and the inner play
Self-lubricating resin seal on the contact surface between
Or lubrication treatment with a solid lubricant .

[0005]

[0006]

[0007]

[0008]

[0009]

Next, an embodiment of the present invention shown in the drawings will be described. In the periodic energy absorbing device shown in FIG. 1, one inner plate 1 and two outer plates 2 sandwiching both outer surfaces thereof are slidably overlapped in a relatively slipping relationship. These are fastened with the high-strength bolt 3 and the nut 4. Inner plates 1 and outer plate 2 is manufactured as such assembled workpieces or castings, such as steel or cast steel. In the outer plate 2, a connector plate 11 is connected to an end opposite to the inner plate 1 by bolts 9 and nuts 10, and a bolt hole 12 in the connector plate 11 and a bolt hole in an outer end of the inner plate 1. A corresponding part of a damper element, such as a seismic element of a building or a machine or a vehicle, for transmitting periodic energy is coupled to 13.

The high-strength bolt 3 penetrates the outer plates 2 and 2 in a direction substantially perpendicular to the sliding direction of the inner plate 1 and substantially in the direction of the center of the guide groove 14 of the inner plate 1 (see FIG. 2). And is fixed with a nut 4. Between the outer plate 2 and the bolt head 3a, firstly, the outer plate 2 and a holding plate 5 having a wide pressure contact surface.
A spring washer 6 such as a spring washer or a disc spring washer is interposed between the holding plate 5 and the bolt head 3a. Similarly, between the other outer plate 2 and the nut 4 shown in the lower part of FIG. 1, first, the outer plate 2 and a pressing plate 5 having a wide pressure contact surface are installed. The spring washer 6 is interposed between the nut 4 and the nut 4.

The holding plate 5 has a plate pressure substantially equal to that of the inner plate 1 (outer plate 2), and
Is formed in a disk shape having an outer diameter substantially equal to the width of the disk (see FIG. 2). The pressure contact surface with the outer plate 2 is formed in a non-contact concave surface portion 15 with a portion centered on the bolt 3, and the other pressure contact surface is configured as a wide pressure contact surface. Therefore, the axial force of the bolt is dispersed over a wide range without concentrating around the bolt, and the surface pressure is equalized.

Also, since the spring washer 6 such as a disc spring washer is interposed between the holding plate 5 and the bolt head 3a (nut 4), the tightening force of the high-strength bolt is not loosened. The vertical load is kept constant and the magnitude of the frictional force is also constant.
As shown in FIG. 1A, a self-lubricating resin sheet 7a made of Teflon (registered trademark) or processed on Teflon is provided on the contact surface between the inner plate 1 and the outer plate 2. Is adhered by bonding. However, as shown in FIG. 1B, the present invention is also implemented by attaching the resin sheet 7b to the outer plate 2 side.

The self-lubricating resin sheet 7a
(Or 7b), or by treating a solid lubricant (not shown). Solid lubricants
For example, it is made of manganese phosphate and molycoat 321R (trade name), and is thickly rubbed into the contact surface of the inner plate 1 (or the outer plate 2). Therefore, since the inner plate 1 and the outer plate 2 do not slide directly, generation of friction noise and galling between the plates is prevented, and a uniform and stable surface pressure is applied to the friction surface.

[0014] Figure 3 is a more ingredients of the inner plates 1
As a physical configuration, the contact surface with the outer plate 2
Shows what projecting 8 to limit the contact portion is formed. The projection 8 is formed in order to generate a stable (or constant) frictional force by sliding the contact portion in a limited manner.

The ridges 8 are symmetrically arranged on the inner plate 1 with the guide groove 14 interposed therebetween, and are preferably formed in two rows in parallel with the sliding direction of the plate. Therefore, the shape of the ridge 8 and the position where the ridge 8 is formed are not limited to the above-described configuration as long as the same operation and effect can be obtained. The ridge 8 contacts the outer plate 2 with the inner plate 1.
It is also implemented by forming on the contact surface. The ridge 8
Is formed by integral molding as a casting, or by a method of cutting out the ridge 8 by cutting or the like (not shown).

According to this embodiment, the inner plate 1
Even if the outer plate 2 and the outer plate 2 slide a considerable number of times, the actual contact is only between the ridges 8 and the surfaces of the outer plate 2 (or the inner plate 1). It can prevent change. In addition, the surface of the ridge 8 or the surface of the inner plate 1 or the outer plate 2
The self-lubricating resin sheet 7a (or 7b) is applied by sticking or treating with a solid lubricant. Not only can the contact surface between the plates be prevented from changing, but also galling, seizure, friction noise, etc. Can be prevented.

[0017]

In the periodic energy absorbing device according to the present invention, the axial force of the bolt is not concentrated around the bolt but is distributed over a wide range and the surface pressure is equalized, so that the contact surface between the plates is constant. Since the magnitude of the frictional force is kept constant and galling and friction noise are prevented, the characteristic curve of energy absorption is displayed stably and neatly, and the quality and accuracy of the building's seismic element or the damper element of machines, vehicles, etc. , Can be used as a reliable one. Then, the tightening force of the high-strength bolt is not loosened, the axial load does not change, and the vertical load is maintained, so that the characteristic curve of the energy absorption is stably maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a periodic energy absorbing device according to the present invention.

FIG. 2 is a plan view of an inner plate showing a relationship between a holding plate and a bolt.

FIG. 3 is a plan view and a side view of an inner plate on which a ridge is formed.

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner plate 2 Outer plate 3 High-strength bolt 4 Nut 3a Bolt head 5 Holding plate 6 Spring washer 8 Ridge 7a, 7b Self-lubricating resin sheet 15 Concave surface

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Higashibata 2-5-14-1 Minamisuna, Koto-ku, Tokyo Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Kenji Takahashi 8-2-1-1, Ginza, Chuo-ku, Tokyo No. Takenaka Corporation, Tokyo Head Office (72) Inventor Yutaka Nanami 547-1, Horinouchi, Kikukawa-cho, Ogasa-gun, Shizuoka Prefecture Inside Asahi Tec Corporation (72) Inventor Shuji Harada 547-1, Horinouchi, Kikukawa-cho, Ogasa-gun, Shizuoka Prefecture Asahi Tec Co., Ltd. (72) Inventor Junichi Masuda 547-1, Horinouchi, Kikukawa-cho, Ogasa-gun, Shizuoka Prefecture Asahi Tec Co., Ltd. (56) References JP-A-2-74771 (JP, A) JP-A-2-209572 (JP, A) JP-A-3-66877 (JP, A) JP-A-53-92889 (JP, U) JP-A-58-91009 (JP, U) JP-A-58-146111 (JP, U) Open Showa 60-116439 (JP, U) Actually open Showa 63-64945 (JP, U) Actually open Showa 64-25541 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16F 15 / 02 E04H 9/02 331 E04H 9/02 351 F61F 7/08

Claims (1)

(57) [Claims] 1. A periodic energy absorbing device in which an inner plate and an outer plate sandwiching both outer surfaces thereof are slidably overlapped in a relatively sliding relationship, and these are fastened with high-strength bolts and nuts. In, one outer plate and the head of the bolt, and between the other outer plate and the nut , each outer plate and a pressing plate of a shape and size having a wide pressure contact surface is installed ,
Spring between the holding plate and the head and nut of the bolt
Interposed washer, and the outer
The contact surface with the plate is a part centered on the position of the bolt.
Part is formed in a non-contact concave part, and
The contact surface between the inner plate and outer plate
The ridge that limits the contact area is the inner plate or outer
On at least one of the plates and in the sliding direction of the plate
And the inner plate and the
Self-lubricating resin sheet on the contact surface of the outer plate
Ku is characterized in that the lubricating treatment is being carried out by the solid lubricant absorber periodic energy.