JPH0651579U - Anti-vibration device - Google Patents

Abstract

(57) [Summary] [Purpose] In a horizontal steady rest, in order to reduce the ratio of the spring constant in the vertical direction to the horizontal direction, simplify the mounting work, and enhance the safety in the event of an abnormal situation. A vibration-proof rubber main body 14 in which a rubber elastic layer 13 is sandwiched between a hollow cylindrical inner metal fitting 10 and a casing metal fitting 12 having a plate-shaped mounting portion 11 on a side peripheral surface, Between the vertical wall body 4 and the slab 5 in the building hall, the axis is arranged vertically. Then, the casing fitting 12 is fitted into the fitting portion of the bracket 6 on the slab 5 side and fastened with the bolt 7. Further, a through bolt 9 is inserted into the inner metal fitting 10, and the through bolt 9 fastens and couples the bracket 6 on the wall body 4 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration damping device, and more particularly to a vibration damping device for preventing horizontal vibration of walls such as holes.

[0002]

[Prior art]

 Generally, in a building, a hall such as a music hall or the entire room has a floating structure, and an anti-vibration device is installed between the wall and the external structure to prevent horizontal vibrations. When doing so, it prevents large impacts and vibrations from being transmitted to the room.

Conventionally, as shown in FIG. 6, such a vibration isolator has a round elastic member formed by sandwiching a rubber-like elastic body layer 2 between two metal plates 1 and adhering them by vulcanization or the like. The rubber plate 3 of the shape is fixed so that one metal plate 1 is in direct contact with the surface of the wall 4 or the slab 5, and the bracket 6 is fastened to the other metal plate 1 by the bolts 7, and the other end is fixed. A device configured to be bolted to the wall 4 or slab 5 is used. In addition, as shown in FIG. 7, two hollow round rubber vibration isolator 8 having a bolt insertion hole at the center are stacked in the vertical direction (vertical direction) and tightened with through bolts 9. With the through bolts 9, the brackets 6 are attached to the middle portion and the bottom portion of the anti-vibration rubber base, respectively, and the other ends of the brackets 6 are fixed to the surfaces of the wall body 4 and the slab 5 by bolts 7, respectively. Anti-vibration devices are also used.

[0004]

[Problems to be solved by the device]

 However, in the vibration damping device having such a structure, in the former device using the round vibration damping rubber base 3, a mechanical coupling element such as a through bolt penetrates the rubber-like elastic body layer 2. Since it was not used, there was a problem in safety in the event of an abnormal situation. Further, in the latter device in which the hollow round vibration-damping rubber bases 8 are stacked and used, the vertical spring constant cannot be said to be sufficiently smaller than the horizontal spring constant. In other words, in anti-vibration devices such as music halls, the weight of the wall is supported by other anti-vibration devices, so the spring constant in the vertical direction must be as small as possible in comparison with that in the horizontal direction. The device shown in FIG. 7 was hard in the vertical direction and had a relatively large spring constant in this direction.

The present invention has been made to solve these problems. The ratio of the spring constant in the vertical direction to the spring constant in the horizontal direction is small, the mounting work is simplified, and an abnormal situation occurs. It is an object of the present invention to provide an anti-vibration device that is highly safe in the event of damage.

[0006]

[Means for Solving the Problems]

 The vibration-damping device of the present invention is a vibration-damping device installed between a chamber wall and a slab provided on the outside thereof, and is a hollow cylindrical inner metal fitting and a casing metal fitting concentrically arranged on the outside thereof. And a vibration-damping rubber body having an annular rubber-like elastic material layer sandwiched between the inner metal fitting and the inner metal fitting, and the inner metal fitting was inserted into the hollow interior. It is fastened to a bracket fixed to one side of the wall or slab via a bolt, and the casing fitting is connected to a bracket fixed to the other side of the wall or slab by bolting. It is characterized by

[0007]

[Action]

 In the vibration damping device of the present invention, the vibration damping rubber body has a structure in which a rubber elastic layer is sandwiched between a hollow cylindrical inner metal fitting and a casing metal fitting. The vibrating rubber body is arranged so that its axial center is vertical, and is fixed to the wall or slab surface through brackets that are connected to the inner metal fittings and casing metal fittings by bolt fastening, etc. Therefore, the ratio of the spring constant in the axial direction (vertical direction) to the spring constant in the horizontal direction perpendicular to the axial center is extremely small, and it also exhibits sufficient vibration isolation in the vertical direction.

Further, since the connection with the bracket is performed by bolting or the like and no welding means is adopted, the on-site installation is easy and does not take much time. Furthermore, when using a through bolt as a bolt that is inserted into the inner metal fitting and fastens the bracket, there is no damage or dropout of the device in the event of an abnormal situation, and the safety is high.

Further, in the vibration isolator having such a structure, the rubber elastic layer is vulcanized and molded on the outer periphery of the inner metal fitting without integrally molding the vibration proof rubber body by vulcanization. In the device in which the shaped body is fitted in the casing fitting, the cost required for vulcanization molding and the like are reduced, and the manufacturing cost of the entire device is reduced.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing an embodiment of a vibration isolation device of the present invention, and FIGS. 2 and 3 are a top view and a vertical cross-sectional view of a vibration isolation rubber body used in the embodiment, respectively. Is. In FIG. 1, the same parts as those in FIGS. 6 and 7 are designated by the same reference numerals and the description thereof will be omitted.

In these drawings, reference numeral 10 indicates a hollow cylindrical inner metal fitting, and on the outer side thereof, a cylindrical casing metal fitting 12 having a plate-shaped mounting portion 11 projecting in two directions on its side peripheral surface is provided. , Arranged concentrically. A ring-shaped layer 13 of rubber-like elastic material is sandwiched between the inner metal fitting 10 and the casing metal fitting 12, and their interfaces are firmly bonded by a method such as vulcanization bonding. Then, such a vibration-proof rubber main body 14 is arranged between the vertical wall 4 of a building hall such as a music hall and the slab 5 provided on the outside thereof so that the axis is vertical, It is installed as shown below. That is, the casing metal fitting 12 is fitted into the fitting portion of the bracket 6 whose one end is fixed to the slab 5 surface by tightening the bolt 7, and the bolt 7 is attached to the mounting portion 11 of the casing metal fitting 12 and the mounting hole of the bracket 6. Connected by inserting and tightening. Also, a through bolt 9 is inserted into the hollow inside of the inner metal fitting 10 so that the bracket 6 whose one end is bolted and fixed to the wall 4 surface by the through bolt 9 is tightened and coupled to the inner metal fitting 10. Is configured.

In the vibration isolator of the embodiment thus configured, the rubber-like elastic body layer 13 has an annular shape, and the inner metal fitting 10 and the case which are concentrically arranged with the axis vertical. Since it is sandwiched between the single metal fitting 12 and the vertical direction, the spring constant in the vertical direction parallel to the axis decreases, and the ratio of the spring constant in this direction to the horizontal spring constant perpendicular to the axis is as shown below. It is extremely small. In other words, in the vibration isolator of the embodiment, the ratio of the vertical spring constant to that in the horizontal direction is about 0.4, which is extremely small compared to other vibration isolator, and the contribution ratio of the spring constant in the vertical direction is small. Is also kept low. Further, since the through bolt 9 that penetrates the vibration isolator in the axial direction is provided and reinforced, the safety is high in the event of an abnormal situation and the device will not be damaged or fall out. Furthermore, since the connection with the brackets 6 on the wall 4 side and the slab 5 side is performed by bolt fastening and no means such as welding is adopted, the on-site installation work is easy and does not take much time. Furthermore, the horizontal and vertical anti-vibration effects are great, and the number of attachments per support point can be kept low, so that the cost can be reduced.

Next, another embodiment of the present invention will be described.

In the vibration isolator of this embodiment, as shown in FIG. 4, the casing metal fitting 12 and the bracket 6 on the slab 5 side are fitted with the casing metal fitting 12 onto the bracket 6 without bolting and fixing. It is connected simply by fitting it in the mating part. Further, the inner peripheral surface of the inner metal fitting 10 is tapped to form a threaded portion 15, and a holding bolt 16 is screwed to the threaded portion, whereby the end portion of the wall body 4 side bracket 6 is formed. Are configured to be fastened. In this embodiment, as in the case of the above embodiment, the ratio of the vertical spring constant to the horizontal spring constant can be made extremely small, and the on-site installation work can be further simplified. it can.

Further, another embodiment of the present invention will be described. In this embodiment, as shown in FIG. 5, an annular rubber-like elastic layer 13 is added to the outer periphery of the hollow cylindrical inner metal fitting 10. A rubber vulcanization molded body 17 formed by vulcanization is fitted into a casing fitting 12 in which a mounting portion 11 is formed at an upper end and a lower end is bent slightly inward to form a vibration proof rubber body 14. There is. Then, such a vibration-proof rubber main body 14 is arranged between the vertical wall body 4 and the slab 5 so that the axis is vertical, and is inserted into the inner metal fitting 10 as in the embodiment of FIG. The brackets 6 that are bolted and fixed to the surfaces of the wall body 4 and the slab 5 are configured to be fastened by the through bolts 9 and the like.

In the vibration isolator of the embodiment configured as described above, the anti-vibration rubber main body 14 including the three components of the inner metal fitting 10, the annular rubber elastic layer 13 and the casing metal fitting 12 is made of rubber. A molded body 17 which is not integrally formed by vulcanization molding of the elastic elastic layer 13 but is formed by vulcanizing the rubber elastic layer 13 on the outer side of the inner metal fitting 10 is provided in the casing fitting 12. Since the structure is fitted, the molding shape is simpler and the number of molds taken per unit time can be increased compared to the case of integrally vulcanization molding. Also, since the molding man-hours are reduced, the cost required for vulcanization molding can be reduced by about 25%. Further, since the casing fitting 12 can be manufactured by a press process with a lower cost instead of the cutting process, the manufacturing cost can be reduced (about 10%) also from this point.

[0018]

[Effect of device]

 As described above, in the vibration isolator of the present invention, the ratio of the spring constant in the vertical direction to the spring constant in the horizontal direction is kept as low as possible, so the horizontal steady-state (vibration prevention) effect is great. In addition, it has good vertical vibration isolation.

Further, it is not necessary to perform welding work at the time of installation at the site, and the work is simple. Furthermore, if a through bolt is provided that penetrates in the axial direction, the safety in the event of an abnormal situation is high. Furthermore, the vibration-damping rubber body is not formed by integral vulcanization molding, but a molded body in which a rubber-like elastic layer is vulcanized and molded into an inner metal fitting is incorporated into a casing metal fitting to form a vibration-damping device. The cost required for forming and vulcanization molding can be reduced.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a vibration isolator of the present invention.

FIG. 2 is a top view of an anti-vibration rubber body that constitutes the anti-vibration device of the embodiment.

FIG. 3 is a vertical cross-sectional view of the anti-vibration rubber body.

FIG. 4 is a partial sectional view showing another embodiment of the vibration isolator of the present invention.

FIG. 5 is a sectional view of an anti-vibration rubber body which constitutes another embodiment of the anti-vibration device of the present invention.

FIG. 6 is a front view showing an example of a conventional anti-vibration device for horizontal steady rest.

FIG. 7 is a front view showing another example of a conventional anti-vibration device for horizontal steady rest.

[Explanation of symbols]

 1 ………… Metal plate 2 ………… Rubber-like elastic body layer 3 ………… Round vibration isolation rubber stand 4 ………… Wall body 5 ………… Slab 6 ………… Bracket 7 ………… Bolt 8 ………… Hollow round anti-vibration rubber stand 9 ………… Through bolt 10 ………… Inner metal fitting 11 ………… Mounting part 12 ………… Casing metal fitting 13 ………… Toroidal rubber layer 14 ………… Vibration isolating rubber body 15 …… … Screw part 16 ………… Presser bolt 17 ………… Rubber vulcanization molding

Claims (1)

[Scope of utility model registration request] 1. A vibration damping device installed between a chamber wall and a slab provided outside thereof, wherein a hollow cylindrical inner metal fitting and a casing metal fitting concentrically arranged outside thereof are provided. , A vibration-damping rubber main body having an annular rubber-like elastic material layer sandwiched therebetween is arranged such that the axis is vertical, and the inner metal fitting is inserted through a bolt inserted into the hollow interior. Characterized in that it is fastened to a bracket fixed to one side of the wall body or slab, and the casing fitting is connected to a bracket fixed to the other side of the wall body or slab by bolting. Anti-vibration device.