JPH0384233A - Damping device - Google Patents

Abstract

PURPOSE:To obtain a large damping force with a compact damping device by disposing a rotation axis at the center in a cylindrical body, accommodating friction members, elastic bodies, and the like around the rotation axis and fitting an arm member. CONSTITUTION:A link 3 and a rotation axis with at least one end thereof protruding outside a body 1 with approximately circular cross section are provided at the center in the body 1. Brake shoes 4 and friction members 6 are fitted at both ends of the link 3 through connecting rotation axes 8, and frictional force adjusting metal springs 7 are provided. An arm member 10 is fitted at the end part of the rotation axis 5 and connected to the piping 12 side. When the piping 12 is vibrated due to earthquake or the like, the rotation axis 5, link 3 and brake shoes 4 perform reciprocating rotation so as to obtain large damping force by braking effect. This damping device is short in the axial direction as well as made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vibration damping device that suppresses vibrations of general structures, piping systems, etc. during earthquakes.

(Prior Art) General structures or large structures such as piping in a power generation plant are at risk of being damaged due to large movement relative to the building during an earthquake or the like. For this reason, vibration damping devices have conventionally been attached to such piping, and are configured to suppress movement of the piping, etc. in the event of an earthquake or the like.

However, conventional vibration damping devices are piston-cylinder type, and have a long axial length and are large in size, making it difficult to install them at your own pace in narrow spaces. Furthermore, all conventional devices are linear vibration damping devices, which has the disadvantage that as the input increases, the response also increases proportionally.

(Problems to be Solved by the Invention) As described above, conventional vibration damping devices are large in size and have the disadvantage that their responsiveness increases in proportion to human power.

The present invention has been made based on the above-mentioned circumstances, and provides a vibration damping device that can be made compact and can provide a large damping force.

[Structure of the Invention] (Means for Solving the Problems) The present invention has a rotating shaft located at the center within a cylindrical main body, and links are formed around this rotating shaft.

This vibration damping device houses a brake shoe, a friction member, and an elastic body, and has an arm member attached to the end of the rotation shaft.

(Function) In the vibration damping device configured as described above, the main body is attached to a fixed side of a building, etc., and the tip of the arm member is connected to a vibrating member such as a pipe.

When this piping etc. vibrates during an earthquake, etc., this rotating shaft is rotated back and forth via the arm member, and the ring and brake shoe rotate together with this rotating shaft, and the friction member at one end of the brake shoe is Slides on the inner wall surface. Energy loss due to friction generated by this sliding, so-called braking effect, provides a large damping force, making it possible to efficiently reduce vibration. Moreover, this vibration damping device can be formed in a small size and can be installed in a narrow place.

(Example) Hereinafter, the present invention will be explained in detail with reference to an illustrated example. FIG. 1 is an assembled perspective view of the exterior, and FIG. 2 is a sectional view taken along the line xx shown in FIG. 1 to show the internal structure. In FIGS. 1 and 2, a main body 1 whose cross section is approximately circular, and a main body 1 having a substantially circular cross section.
a rotating shaft 5 disposed substantially centrally within the main body 1 with at least one end projecting to the outside of the main body 1; a link 3 installed on the rotating shaft 5 for transmitting the rotation of the rotating shaft 5; A brake shoe 4 is attached to both ends of the link via a connecting rotation shaft 8, a friction member 6 for sliding on the inner wall surface of the main body 1 is attached to the tip of the brake shoe 4, and a friction member 6 is attached to both ends of the center of the link 3. A metal spring 7 for adjusting frictional force is housed between the brake shoe 4 and the inside of the tip end of the brake shoe 4. This main body 1 is attached to a fixed member such as a building by means of a portion 2 at the bottom of the main body 1.

The spring constant of the metal spring 7 can be appropriately set depending on the strength of the braking effect.

Further, the pivot 5 protruding from the main body 1 is rotatably supported by a bearing or the like (not shown), and an arm member 10 is attached to the end thereof. This rotation axis 5
A spline or serration 9 is formed at the end of the arm member 10, and a serration hole 10c that fits into the serration 9 is formed in the boss portion 10a of the arm member 10.

This arm portion 10 is fitted into the serrations 9 and fixed with a nut 11. Further, a mounting portion 10b is formed at the distal end of the arm portion 10, and the arm portion 10 is connected to the piping side via the mounting portion 10b. In addition, when this arm member 10 is attached to the above-mentioned rotation shaft 5, by shifting the fitting with the serrations 9 by one tooth, the arm member 10 can be attached to the rotation shaft 5, that is, with respect to the link 3, as desired. It is constructed so that it can be installed at any angle.

As shown in FIG. 3, the $IJ shaker lid device according to the embodiment of the present invention configured as described above is arranged near the piping 12, and its main body 1 is attached to the wall 14 of the building at the mounting portion 2. Further, the distal end connecting portion 10b of the arm member 10 is connected to the piping 12 side via a clamp 13 or the like. When the piping 12 vibrates during an earthquake or the like, the arm member 10 rotates back and forth, and as a result, the rotation shaft 5, the link 3, and the plexi: 1. 4 rotates back and forth, and the friction member 6 at the end of the brake shoe 4 slides on the inner wall surface of the main body 1. A large damping force can be obtained by the friction loss caused by this sliding, the so-called braking effect. As a result, vibration of the pipe 12 can be significantly reduced, and damage to the pipe 12 can be prevented. Further, the vibration damping device of the present invention has a short length in the axial direction,
The arm member 10 can be installed even in a narrow space, and since the arm member 10 is configured so that its attachment angle can be set freely with respect to the rotation shaft 5, the installation is easy.

FIG. 4 and FIG. 5 show a modification of the installation of the vibration damping device of the present invention. Fig. 4 shows a configuration in which the device main body 1 is installed near a bent part of a pipe, etc., and two arm parts 10 are made to protrude from one vibration damping device to the pipe 12 in both the horizontal and vertical directions in the figure. This is what I did.

In addition, FIG. 5 shows a configuration in which two sets of links 3, rotation 1dl 8, brake shoes 4, etc., each housed in the main body 1, are provided independently, and arm portions 10° 20 protrude from both sides of the main body 1. It is. In other words, two vibration damping devices are functionally housed in one main body 1.

According to such a modification, vibrations of pipes extending in different directions can be damped in a narrow space and with a small number of damping devices.

FIG. 6 shows a modification of the vibration damping device of the present invention.

In the previous embodiment, various members for achieving the braking effect were housed in the main body 1, but in this modification, the link 3, rotating shaft 8, brake shoe 4, and friction member 6 are housed in the cylindrical main body 1. It is placed outside the . The elastic force for pressing the friction member 6 against the main body 1 and causing it to slide can be obtained by separately installing a tension spring between the rotating shaft 5 and the brake shoe 4, or by
Alternatively, a spring or the like may be inserted into the rotating shaft 8 to obtain force for pressing.

In such a configuration, since various members are arranged outside the main body 1, maintenance after installation becomes easy.

As described above, the present invention can be modified and used in various ways without departing from the gist thereof.

[Effects of the Invention] As described in detail above, according to the present invention, a vibration damping device that is small and has a large damping force can be formed, and can be installed even in a narrow place.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line XX in FIG. 4 and 5 are side views showing a modified example of the installed state of the vibration damping device of the present invention, and FIG. 6 is a perspective view showing a modified example of the vibration damping device of the present invention. 1...Body, 2...Body mounting part, 3...Link, 4...Brake shoe 5...Rotation shaft, 6...
Friction member, 7... Metal spring, 8... Rotating shaft for connection,
9... Serration, 10... Arm member, 11.
...Nut, 12...Piping, 13...Clamp, 1
4...Front/floor.

Claims (3)

[Claims] (1) A main body in which at least a portion of a cylindrical surface is formed; a rotation shaft rotatably provided with respect to the main body at approximately the center of curvature of the cylindrical surface; and the cylindrical surface. a brake shoe that has a friction member in contact with the brake shoe and is movable along the cylindrical surface; and a transmission member that transmits the rotation of the rotation shaft to the brake shoe and moves the brake shoe. A vibration damping device characterized by: (2) The vibration damping device according to claim 1, further comprising an elastic member for adjusting the frictional force between the friction member and the cylindrical surface. (3) The vibration damping according to claim 1, wherein the main body has a hollow part in which the cylindrical surface is formed, and the brake shoe and the transmission member are disposed in the hollow part. Device. (4) causing the rotation shaft to protrude outside the main body;
A claim characterized in that one end of an arm whose mounting angle can be arbitrarily adjusted with respect to the rotation shaft is attached to the end of the rotation shaft, and the other end of this arm is attached to a member that vibrates and is to be damped. The vibration damping device according to item 1.