JPH04210135A - Vibration damping device - Google Patents

Abstract

PURPOSE:To provide a small-sized vibration isolating device which exerts a large damping force, by furnishing the body with a part where a damper in rotation runs against. CONSTITUTION:To a body 1 having a cavity, a rotary shaft 5 is installed in such a way that one end protrudes-from the body 1, and a damper 31 made of an elastoplastic member rotating with rotation of the rotary shaft is installed in this cavity of the body 1. The body 1 is provided with a part 32 which the damper in rotation 31 runs against. An arm 10, etc., is installed on the rotary shaft 5 protruding from the body 1, and the arm 10 is mounted on a structural member vibrating, for example a piping 12, so as to suppress vibration of the piping 12, etc.

Description

[Detailed description of the invention]

[Purpose of the invention] [00011

[Industrial Field of Application] The present invention relates to a vibration damping device for suppressing vibrations of general structures, piping systems, etc. during earthquakes. [0002] [0002] [0002] - Large structures such as shell structures or piping of power generation plants are at risk of being damaged due to large vibrations relative to buildings during an earthquake or the like. For this reason, vibration damping devices have conventionally been attached to such piping, and are configured to suppress vibrations of the piping in the event of an earthquake or the like. However, conventional vibration damping devices are of the piston-cylinder type, and have a long axial length and are large in size, making it difficult to secure installation space 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. [0003]

SUMMARY OF THE INVENTION As described above, conventional vibration damping devices have the drawbacks of being large in size and requiring installation space, or having a large response to vibration input. The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a vibration damping device that is small and can obtain a large damping force. [Structure of the invention] [0004]

[Means for Solving the Problems] The vibration damping device of the present invention includes a main body, a rotating shaft rotatably attached to the main body, and a bullet that rotates in accordance with the rotation of the rotating shaft. It is characterized by being composed of a damper made of a plastic member and a collision part that is attached to the main body and collides with the damper when it rotates. Further, the brake shoe is characterized in that it further includes a brake shoe that rotates in accordance with the rotation of the rotation shaft and has a friction member that comes into contact with the main body during rotation. [00053

[Function] In the vibration damping device configured in this way, the main body is attached to the fixed part side of a building, etc., and the tip end side of the rotating shaft is attached to the side of the member to be damped, such as the piping side, via an arm member etc. Attach to. When the piping or the like vibrates during an earthquake or the like, the rotation shaft rotates, and accordingly, the damper made of an elastoplastic member collides with the collision member to obtain a damping force. Further, in response to large vibrations of piping or the like, the rotation shaft rotates greatly, the amount of rotation of the damper also increases, and the damper made of an elastoplastic member is plastically deformed with respect to the collision member. This plastic deformation provides a large damping force, making it suitable for small installation spaces and exhibiting great damping effects even against large-scale vibrations. [0006] Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 and 2 relate to the first embodiment of the present invention. FIG. 1 is an external assembled perspective view, and FIG. 2 is an internal structure, which is shown in FIG. - It is an X-ray sectional view. [00071 In FIGS. 1 and 2, the vibration damping device of this embodiment has a rotating shaft 5 whose one end is inserted into the main body 1 and whose other end projects outside the main body 1, and which is fixed to the rotating shaft 5. For installation, a recess is formed in the inner wall of the main body 1 using a damper 30, a damper 31 made of an elastoplastic member attached to the mounting flange 30, and the damper 31 collides with each other as the rotation shaft 5 rotates. Basically, it includes a collision part 32. [0008] On the other hand, a rotating shaft 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 its end. A spline or serration 9 is formed at the end of the rotation shaft 5, and a serration hole 10c that fits into the serration 9 is formed in the boss portion 10a of the arm member 10.
is formed. This arm portion 10 is fitted into the serrations 9 and fixed with a nut 11. Also, a part 10 is attached to the tip of the arm part 10.
b is formed, and in this attachment, this arm portion 10 is connected to the piping side via a portion 10b. Note that this arm member 1
0 can be installed at any angle with respect to the rotation shaft 5, that is, with respect to the link 3, by shifting the engagement with the serrations 9 by one tooth when installing it on the rotation shaft 5. It is configured so that it can be done. [0009] As shown in FIG. 3, the vibration damping device of the first embodiment of the present invention configured as described above is arranged near the piping 12, and the main body 1 is attached to the wall of the building at the mounting part 2. 14, and the distal end connecting portion 10b of the arm member 10 is connected to the piping 12 side via the clamp 13 or the like. When the pipe 12 vibrates during an earthquake or the like, the arm member 10 rotates back and forth, and the rotation shaft 5 rotates accordingly.
The damper 31 collides with the collision part 32, and a damping force is obtained. [00101 If the vibration force is particularly large, the damper 31
undergoes plastic deformation (shear deformation), and vibrations are efficiently absorbed. In this way, a small vibration damping device can provide good damping force even against large vibration forces. [00111 Note that as the elastic-plastic member used as the damper 31, iron materials, lead, lead-based alloys, etc. can be used, but lead-based materials in particular have excellent plasticity and function as a powerful plastic damper member. . (Embodiment 2) [00121 FIGS. 4 and 5 relate to a second embodiment of the present invention, in which FIG. 4 is an external assembled perspective view, and FIG. 5 is an internal structure shown in FIG. -y line sectional view. Note that the same or corresponding parts as in FIGS. 1 and 2 will be described with the same reference numerals. [00131 In FIGS. 4 and 5, there is a main body 1 having a semicircular cross section, a rotating shaft 5 located in the center with at least one end protruding outside the main body 1, and a rotating shaft 5 located in the center with at least one end protruding outside the main body 1. A link 3 is installed on the top of the link 3 to transmit rotation, and a brake shoe 4 is attached to the end of this link 3 via a connecting rotation shaft 8, and a brake shoe 4 is attached to the tip of the brake shoe 4. Friction member 6 that slides on the inner wall surface of the main body 1
, a metal spring 7 for adjusting frictional force provided between the outer wall of the link 3 and the inside of the tip of the brake shoe 4, and the main body 1.
A yield stress lower than that of the materials of the main body 1, rotation shaft 5, link 3, brake shoe 4, and metal spring 7 is formed within the volume consisting of the inner link external part and the collision part provided on the inner wall side of the main body 1 and having an appropriate gap. A damper 31 made of an elastoplastic member and having a flange 30 is mounted therein. This main body 1 is attached to a fixed member such as a building by means of a section 2 at the bottom of the main body. [0014] Further, the rotating shaft 5 protruding from the main body 1 is rotatably supported by a bearing (not shown), etc., and an arm member 10 is attached to the end thereof. A spline or serrations 9 are formed at the end of the rotating shaft 5, and a serration hole 10c that engages with the serrations 9 is formed in the boss portion 10a of the arm member 10. This arm member 10 is engaged with the serrations 9 and fixed with a nut 11. Further, a mounting portion 10b is formed at the distal end of the arm member 10, and the arm member 10 is connected to the piping side of a large object via the mounting portion 10b. [0015] When the arm member 10 is attached to the rotation shaft 5, by shifting the engagement with the serrations 9 one tooth at a time, the arm member 10 can be set at any angle with respect to the rotation shaft 5, that is, with respect to the link 3. It is configured so that it can be installed on. [0016] The vibration damping device of the second embodiment of the present invention configured as described above is arranged near the piping 12 as shown in FIG. 6, the main body 1 is attached to the wall 14 of the building, and the arm member 10 is connected to the piping 12 side via a clamp 13 or the like. In the event of an earthquake, pipe 12
When the arm member 10 vibrates, the arm member 10 rotates back and forth, and accordingly, the rotation shaft 5, the link 3, and the brake shoe 4 rotate back and forth, and the friction member 6 at the end of the brake shoe 4 touches the inner wall surface of the main body. slide. A large damping force is obtained by the friction loss caused by this sliding, the so-called braking effect. This braking effect can be exerted even if the vibration is small and the rotation shaft 5 rotates only slightly. Furthermore, if the vibration is large and cannot be suppressed by the above-mentioned braking effect alone, the vibration is transmitted by the collision part 32 provided on the inner wall surface of the main body 1 to the damper 31 made of an elastoplastic member installed on the outer wall of the link 3. It is effectively absorbed by the plastic deformation (shear deformation) of the member. [0017] Also, like the previous embodiment, the vibration damping device of this embodiment has a short length in the axial direction, and can be installed in a narrow place. It is easy to install because its mounting angle can be set freely. [0018] Note that the elastic-plastic member constituting the damper 31 is attached to the main body 19 rotation shaft 5. Link 3. A material with a lower yield stress than the material of the brake shoes 4 and the metal spring 7 is better as a plastic damper, but in this case as well, lead-based materials may be used as in the previous embodiment. can. [00191 FIGS. 7 and 8 show a modification of the installation of the vibration damping device of the present invention. In FIG. 7, the device main body 1 is installed near a bent part of a pipe, etc., and two arm parts 10 are connected to the pipe 12 in both the horizontal and vertical directions in the figure from one vibration damping device.
It is constructed by making it stand out. [00201 In addition, FIG. 8 shows that two sets of links 3, rotating shafts 5, brake shoes 4, etc. housed in the main body 1 are provided independently, and arm parts 10.20 are made to protrude from both sides of the main body 1. It is something. In other words, functionally two damping devices can be combined into one.
It is 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. Note that the present invention is not limited to the embodiments described above, and can be implemented with various modifications without departing from the gist thereof. [00211] [Effects of the Invention] As explained above, the vibration damping device of the present invention is small and can be installed even in a narrow installation space, and a large vibration suppressing force can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an external assembly diagram showing an embodiment of a vibration damping device of the present invention.

FIG. 2 is a sectional view taken along the line XX in FIG. 1;

FIG. 3 is a sectional view showing an installation example of the vibration damping device of the present invention.

FIG. 4 is an external assembly diagram showing a modification of the vibration damping device of the present invention.

FIG. 5 is a cross-sectional view taken along the line y-y in FIG. 4.

FIG. 6 is a sectional view showing an installation example of the vibration damping device of the present invention.

FIG. 7 is a sectional view showing a modification of the installation example of the vibration damping device of the present invention.

FIG. 8 is a sectional view showing a modification of the installation example of the vibration damping device of the present invention.

[Explanation of symbols] 1 Main body 3 Link 4 Brake shoes 5 Rotation axis 6 Friction member 7 Spring 31 Damper 32 Collision part

[Figure 6]

Claims (1)

[Claims] Claims 1: A main body, a rotation shaft rotatably attached to the main body, a damper made of an elastic-plastic member that rotates in response to rotation of the rotation shaft, and a damper attached to the main body. a collision part that collides when the damper rotates;
A vibration damping device comprising: [Claim 2
12. The brake according to claim 1, further comprising a brake shoe that rotates in accordance with the rotation of the rotation shaft and has a friction member that comes into contact with the main body during rotation. Shaking device.