JPH0540344Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a damping device that suppresses vibrations by absorbing and attenuating vibration energy.

"Prior Art" As a conventional damping device of this type, one shown in FIG. 6 is known.

Reference numeral A in the figure is a damping device. This damping device A
is provided with a ceiling slab 1 and a bottom slab 2 parallel to the ceiling slab 1, and between the ceiling slab 1 and the bottom slab 2,
A plurality of steel rods 3, 3,... are perpendicular to these.
are fixed, and the steel rods 3, 3, . . . are arranged in a double circumferential manner. Further, a piston 4 is fixed to the ceiling plate 1, and a cylinder 5 is disposed on the outer circumference of the piston 4 and is slidable therewith.

The damping device A is arranged between the upper and lower members 6 and 7, with the cylinder 5 fixed to the upper member 6 and the bottom plate 2 fixed to the bottom member 7, and when vibration occurs, The steel rod 3 of the damping device is plastically deformed to absorb vibration energy and attenuate the vibration. FIG. 7 shows the load P caused by this damping device A.
(ton) and strain δ (cm).

``Problem to be solved by the invention'' However, since the conventional damping device has a structure in which the piston 4 and the cylinder 5 are disposed on the upper part of the ceiling member, the components of the damping device are reduced accordingly. The damping device becomes taller and the space in which the damping device is installed becomes larger, and the piston is fixed to the top of the ceiling plate 1, making it difficult to repair, inspect, or replace the damping device.
In addition, the slide mechanism using the piston and cylinder requires highly accurate dimensional tolerances, resulting in high manufacturing and material costs, resulting in an expensive device.

The present invention has been made in view of the above-mentioned problems, and can reduce the installation space, and
The object of the present invention is to provide a damping device that can be easily repaired, inspected, or replaced, and is inexpensive to manufacture.

"Means for Solving the Problem" This invention is based on a method in which a ceiling slab and a bottom slab are placed apart from each other by a predetermined distance, are fixed to be substantially orthogonal to the ceiling slab, and have a length that is equal to the distance between the ceiling slab and the bottom slab. and a steel rod whose length is approximately half the distance between the ceiling plate and the bottom plate and which is fixed substantially orthogonally to the bottom plate. , a cylindrical member of a predetermined length is provided near the tip of the steel rod to cover the outer periphery of the steel rod, and the inner diameter of the cylindrical member is equal to the outer diameter of the steel rod. The cylindrical member is slightly larger than the diameter thereof, and furthermore, the end of the cylindrical member is removably fixed to either end of the steel rod.

"Function" According to this invention, when vibration occurs during an earthquake, etc., the tips of the steel rods fixed to the ceiling plate and the bottom plate come into contact with and separate from each other. A cylindrical member fixed to the rod is provided, and the inner diameter of the cylindrical member is slightly larger than the inner diameter of the steel rod, so that the steel rod does not slip out of the cylindrical member. Therefore, while the steel rod can move freely in the vertical direction, its movement in the horizontal direction is restricted by the cylindrical member, and it immediately and continuously develops a resistance force against horizontal movement. . When the amount of movement of the ceiling slab or the bottom slab is large, plastic deformation occurs near the fixed end of the steel rod, thereby absorbing vibration energy and damping the vibration.

"Example" The present invention will be described below with reference to the drawings. FIGS. 1 to 5 show an embodiment of the present invention, and in these figures, the same elements as those in the prior art are designated by the same reference numerals.

The damping device A of this embodiment is provided with a ceiling plate 1 and a bottom plate 2 in parallel, and the ceiling plate 1 has a predetermined length downward in the vertical direction (approximately half the distance between the ceiling plate 1 and the bottom plate 2). ) is fixed, while the upper steel rod 3a of
A lower steel rod 3b having the same dimensions as the upper steel rod 3a is fixed to the bottom plate 2 upward in the vertical direction. The tip of the upper steel rod 3a and the tip of the lower steel rod 3b are spaced apart from each other by a predetermined distance, as shown in FIG. A sleeve (cylindrical member) 10 is provided to cover the outer circumferences of the upper steel rod 3a and the lower steel rod 3b.

The bottom side of this sleeve 10 has a female thread 10a.
is formed, and the female screw 10a thereof is screwed into the male screw 3c formed at the tip of the lower steel rod 3b, thereby being fixed near the tip of the lower steel rod 3b. Furthermore, the upper side of the sleeve 10 has a length that does not come off even if the damping device A vibrates, and slidably covers the tip of the upper steel rod 3a. As shown in FIG. 3, the upper steel rod 3a and the lower steel rod 3b are arranged in a double layer between the ceiling plate 1 and the bottom part 2 so as to form a circumferential plane. ing.

The damping device A configured in this way is
As shown in FIG. 1, the ceiling plate 1 is fixed to the upper member 6, and the bottom plate 2 is fixed to the lower member 7, so that they are installed between the upper member 6 and the lower member 7. .

Next, the operation of the damping device of this embodiment configured as described above will be explained.

A damping device A arranged as shown in FIG.
When the upper member 6 and the lower member 7 vibrate with each other,
The ceiling plate 1 and the bottom plate 2 fixed to this vibrate. Then, when the ceiling plate 1 and the bottom plate 2 vibrate,
The upper steel rod 3a fixed to the ceiling plate 1 and the lower steel rod 3b fixed to the bottom plate 2 vibrate, and the tips of the steel rods 3a and 3b move toward and away from each other. However, the sleeve 1 is attached to the tip of the lower steel rod 3b.
0 is fixed, the tip of the upper steel rod 3a will not come out of the sleeve 10. Therefore, while the upper steel rod 3a and the lower steel rod 3b can freely move relative to each other in the vertical direction, their movement in the horizontal direction is restricted by the sleeve 10, and the horizontal movement of the ceiling plate 1 and the bottom plate 2 Expresses resistance to movement. When the amount of movement of the ceiling plate 1 and the bottom plate 2 is large, as shown in FIG. Nearby 3y
plastic deformation occurs, which absorbs vibration energy and damps vibrations.

Here, the load P caused by the damping device A of this embodiment is
Fig. 5 shows the restoring force characteristics, which express the relationship between (ton) and strain δ (cm). As can be seen from this figure, it is possible to obtain a damping effect substantially similar to the restoring force characteristic of the conventional damping device shown in FIG. 7. In the damping device of this embodiment, the damping characteristics of the device can be adjusted by changing the size and number of steel rods.

In this way, the damping device of this embodiment has the ceiling plate 1
The tip of the upper steel bar 3a fixed to the bottom plate 2 and the tip of the steel bar 3b fixed to the bottom plate 2 are arranged apart from each other, and the outer periphery of the upper steel bar 3a is placed near the tip of the lower steel bar 3b. Since the covering sleeve 10 is fixed, the structure of the damping device can be lowered, and the space in which the damping device is installed can be narrowed. As a result, when the present invention is applied to structures such as buildings, the floor height can be reduced accordingly. Furthermore, since the damping device A utilizes plastic deformation of the steel rod, it has a simple structure and is very easy to repair, inspect, or replace, and the upper steel rod 3a and sleeve 10 do not come off. It is sufficient to manufacture it so that it can slide smoothly and without requiring high dimensional accuracy, and the manufacturing and material costs can be kept low.

Also, the length of the steel rod 3a and the steel rod 3b is the same as that of the ceiling plate 1.
The length is approximately half the distance between the bottom plate 2 and the bottom plate 2.
That is, it becomes possible to divide the damping device into two in the height direction, and the weight and size of the divided damping device can be halved. Therefore, repair, inspection, or replacement of the damping device can be made very easy.

In addition, a female thread 1 is provided on the inner peripheral surface of the end of the sleeve 10.
Since the sleeve 10 is fixed to the steel rod 3b by screwing the female thread 10a onto the male thread 3c formed at the end of the steel rod 3b, it is easy to connect the steel rod 3b and the sleeve 10. It can be integrated into one piece, and from this aspect as well, repair, inspection, or replacement can be made very easy.

Note that other embodiments or technical matters other than those described above will be described below.

(i) In the above embodiment, the upper steel bar 3a and the lower steel bar 3
b have the same dimensions, but the length, inner diameter, and cross-sectional shape of the sleeve 10 can be changed as appropriate depending on the amount of movement of the steel bar, without being limited thereto.

(ii) In the above embodiment, the upper steel bar 3a and the lower steel bar 3
b is arranged between the ceiling plate 1 and the bottom plate 2 in a circumferential shape with double planes, but the plane is not limited to this, and any shape may be arranged between the ceiling plate 1 and the bottom plate 2. Of course, the dimensions of the steel rod can be changed as appropriate depending on the applied force.

(iii) In the above embodiment, the sleeve 10 is fixed to the tip of the lower steel rod 3b, but the sleeve 10 is fixed to the tip of the upper steel rod 3a.
is fixed, and the tip of the lower steel rod 3b is attached to the sleeve 1.
The structure may be such that it slides inside the 0.

(iv) The damping device of the present invention is not limited to vertical position.
It may be installed in a horizontal position (so that the steel rod extends horizontally).

"Effects of the Invention" As explained above in detail, according to the attenuation device of the present invention, the ceiling slab and the bottom slab are arranged at a predetermined distance apart, and are fixed substantially perpendicularly to the ceiling slab, and the length of the ceiling slab is a tip of a steel rod whose length is approximately half the distance between the ceiling slab and the bottom slab; The tips of a steel rod having a length are arranged at a predetermined distance apart, and a cylindrical member having a predetermined length that covers the outer periphery of the steel rod is provided near the tip of the steel rod. The inner diameter of the cylindrical member is slightly larger than the outer diameter of the steel rod, and the end of the cylindrical member is removably fixed to either end of the steel rod. When the bottom plate vibrates, the steel rod can move freely in the vertical direction, but its movement in the horizontal direction is restricted by the cylindrical member, and the horizontal movement of the ceiling plate and bottom plate is immediately inhibited. However, at this time, plastic deformation occurs near the fixed end of the steel rod, which absorbs vibration energy and dampens the vibration. The structure is much simpler than that of
The structure of the damping device can be lowered, the installation space for the damping device can be narrowed, and repair, inspection, or replacement can be easily performed. Moreover, manufacturing is easy without requiring high dimensional accuracy, and manufacturing and material costs can be reduced, resulting in an inexpensive device.

In addition, the length of the steel rod is approximately half the distance between the ceiling plate and the bottom plate, which means that the damping device can be divided into two in the height direction, and the divided damping device can be halved in weight and size. Therefore, repair, inspection, or replacement of the damping device can be made very easy.

In addition, since the end of the sleeve is removably fixed to the steel rod, the steel rod and sleeve can be easily integrated, making repair, inspection, or replacement extremely easy. can do.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, and FIG. 1 is a side sectional view of the device of the present invention;
Fig. 2 is an enlarged cross-sectional view of the connecting portion of the steel rod, Fig. 3 is a cross-sectional view taken from Fig. 1, and is a plane sectional view of the device, and Fig. 4 a and b illustrate the deformed state of the device. FIG. 5 is a diagram showing the restoring force characteristics of the device of the present invention, FIGS. 6 and 7 are diagrams showing the conventional technology, and FIG. 6 is a sectional view of the damping device.
FIG. 7 is a diagram showing restoring force characteristics. 1...Ceiling plate, 2...Bottom plate, 3...Steel bar (3a
...upper steel rod, 3b ... lower steel rod), 10 ... cylindrical member (sleeve).

Claims (1)

[Scope of utility model registration request] The ceiling plate and the bottom plate are arranged at a predetermined distance apart,
a tip of a steel rod that is fixed substantially perpendicular to the ceiling slab and has a length that is approximately half the distance between the ceiling slab and the bottom slab; is located at a predetermined distance from the tip of a steel rod having a length that is approximately half the distance between the ceiling plate and the bottom plate, and covers the outer periphery of the steel bar near the tip of the steel bar. A cylindrical member of a predetermined length is provided, the inner diameter of the cylindrical member is slightly larger than the outer diameter of the steel rod, and the end of the cylindrical member is located at either end of the steel rod. A damping device characterized in that it is removably fixed to.