JPH026366B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a viscous damper for a structure frame.

[Conventional technology]

In structures such as piping, changes in temperature,
The piping expands and contracts due to temperature changes in the piping caused by changes in the temperature of the fluid in the piping or changes in the degree of filling of the fluid in the piping.

If the piping is placed on a pedestal, the pedestal is considered not to move, so the piping will move relative to the pedestal due to thermal expansion and contraction of the piping, but the piping, pedestal,
To avoid applying excessive stress to equipment, etc.
Fixing the piping and the frame to each other must be avoided.

When the piping moves due to thermal expansion and contraction, the stress that acts on the piping and the frame is the stress that acts on the pipe and the frame when the pipe is not fixed to the frame. In order to reduce this frictional force, it is common practice to interpose a fluorine resin plate or the like between the shoe and the stand.

However, the fact that the piping and shoes are not constrained by the pedestal and can move freely means that the pedestal can move freely against earthquakes and other vibrations without applying any force to the piping. In order to prevent earthquakes and other vibrations, it is desirable that the pipes and shoes be fixed to a frame because excessive force will be concentrated at the fixed points of the pipes and lead to destruction of the piping system.

Therefore, it is best to provide a bonding condition between the shoe and the frame that has low resistance against low-speed movements such as thermal expansion and contraction, and high resistance against high-speed movements such as earthquakes. becomes.

Conventionally, in order to achieve the above-mentioned joining conditions, an oil damper was interposed between the pipe or the shoe supporting the pipe and the frame, or a fixed resistance plate made of thin plates such as steel and a moving resistance plate were used. They are arranged alternately within the casing with gaps between them.
When a relative movement occurs between the resistance plates in a direction along the plate surface, a viscous shearing resistance force is generated by a viscous substance on the moving resistance plate engaged with the engagement block,
There are some things that have a buffering effect (Jekkoaki)
54-43264).

[Problem to be solved by the invention]

In the conventional technology described above, when using an oil damper, a high degree of machining accuracy is required for the sliding part, the structure is complex, so maintenance and inspection is difficult, and furthermore, oil leaks into the seal part due to long-term use. It has the disadvantage that it leaks from the
In the device disclosed in Publication No. 43264, when the structure to which the engagement block is fixed vibrates (moves) or rotates in the vertical direction due to an earthquake or the like, the moving resistance plate comes off the engagement block and the function is lost. It also has the disadvantage that it is only intended for damping in the longitudinal direction of the resistance plate and is not effective for damping in other directions.

The present invention has been made in view of the problems of the conventional technology, and even if the structure (shu) vibrates (moves) or rotates in the vertical direction, the fixed plate and the movable plate remain immovable. It does not impair its functionality, is effective in suppressing vibrations in all directions in the horizontal plane, and has a simple structure and easy maintenance and inspection.
The purpose of the present invention is to provide a viscous damper for a structure frame that is highly reliable even during long-term use.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a viscous damper for a structure mount, which is provided in a structure mount system in which a structure that undergoes thermal expansion and contraction is supported on the mount so that it can move in the horizontal direction via a shoe. a fixed box fixed to the pedestal frame and containing a viscous body; a fixed box movable up and down with respect to the shoe, coupled to the shoe so as to be rotatable and swingable, and movable in the horizontal direction together with the structure; a movable lid placed on the fixed box; a fixed plate that is immovable in the horizontal direction relative to the fixed box and provided within the fixed box approximately parallel to the horizontal direction; It has movable plates which are immovable in the horizontal direction and which are provided on the movable lid alternately with the fixed plate so as to have gaps therebetween.

Further, one of the fixed plate and the movable plate,
Alternatively, both can be vertically movable relative to the fixed box and vertically movable relative to the movable lid.

[Effect]

In the present invention configured as described above, when the structure is thermally expanded and contracted, the shoe moves horizontally on the frame. At this time, as the movable lid coupled to the shoe moves horizontally, the movable plate also moves horizontally within the fixed box. Since the speed of this movement is low, the viscous shearing resistance force acting on the movable plate due to the viscous material between the fixed plate and the movable plate is also small, and therefore the shoe moves smoothly on the pedestal.

On the other hand, when the structure (shew) vibrates horizontally at high speed on the pedestal due to an earthquake or the like, the movable lid vibrates horizontally, and the movable plate also vibrates horizontally within the fixed box. Since the speed of this vibration is high, a high-velocity flow of viscous material occurs between the fixed plate and the movable plate, and the viscous shear resistance force exerted on the movable plate by the viscous material increases, causing The relative movement between them will be greatly suppressed. Even if the structure (the shoe) vibrates (moves) or rotates in the vertical direction, the movable lid is connected to the shoe so that it can move vertically and rotate freely with respect to the shoe. The movable lid is in an immovable state, and the movable plate and fixed plate are also in an immovable state.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view of an embodiment of a viscous damper for a structure frame according to the present invention, FIG. 2 is a partial side view of the main part of FIG. 1 in cross section, and FIG. 3 is a main part of FIG. 1. FIG.

A shoe 2 supporting a pipe 1, which is a structure, is mounted on a frame 3 so as to be movable in the horizontal direction via sliding means 4. The piping 1 is fixed to the shoe 2, and the sliding means 4 is made of a material with a small friction coefficient, such as a fluororesin plate. A fixed box 6 is fixed to the pedestal 3 via a reinforcing plate 7, and the fixed box 6 is a container of a viscous material 11 having a flat bottom and a surrounding wall. A disc-shaped movable lid 5 connected to the shoe 2 via a joining member 5a is placed on the upper part of the fixed box 6, and a dustproof cover is provided at the contact area between the fixed box 6 and the movable lid 5. A seal (not shown) is provided.
In a fixed box 6 that houses a viscous body 11, a plurality of movable plates 8 and fixed plates 9 are alternately stacked in parallel in the horizontal direction with spacers 10 in between. The movable plate 8 and the fixed plate 9 are both donut-shaped discs with a central hole formed, and the outer diameter of the movable plate 8 is smaller than the inner diameter of the fixed box 6.
The outer diameter of the fixing box 6 is approximately equal to the inner diameter of the fixing box 6. Movable lid 5
A movable cylinder 13 is integrally formed protruding from the center of the inner surface of the movable cylinder 13, and a hollow cylindrical jig 15 is fitted into the movable cylinder 13. The inner diameter of the movable plate 8 is approximately equal to the outer diameter of the cylindrical jig 15, and the inner diameter of the fixed plate 9 is larger than the outer diameter of the cylindrical jig 15. A movable cylinder 13 is passed through the central hole of each plate 8, 9 via a cylindrical jig 15, and the movable plate 8 is movable in the vertical direction relative to the movable lid 5, cannot be moved in the horizontal direction, and is fixed. The plate 9 is movable in the vertical direction with respect to the fixed box 6.
Cannot move horizontally.

The movable lid 5 and the joining member 5a are fixed by an adjustment screw 16, and when they are fixed, their mutual positional relationship is adjusted by the adjustment screw 16 and then fixed. The joint member 5a is coupled to the slide member 14 via a pin joint 12 so as to be rotatably swingable in the vertical direction.
The slide member 14 is coupled to the shoe 2 so as to be movable vertically relative to the shoe 2.

Next, the operation of this embodiment will be explained.

When the pipe 1 undergoes thermal expansion and contraction due to changes in the air temperature, changes in the temperature of the fluid in the pipe 1, changes in the degree of fluid filling, etc., the shoe 2 moves horizontally on the frame 3. At this time, as the movable lid 5 connected to the shoe 2 via the slide member 14, pin joint 12, and joint member 5a moves in the horizontal direction, the movable plate 9 is also fixed via the movable cylinder 13 and the cylindrical jig 15. Move horizontally within the box 6. Since the speed of this movement is small, the viscous body 11 between the fixed plate 8 and the movable plate 9
The viscous shear resistance force acting on the movable plate 9 is also small,
Therefore, the shoe 2 (piping 1) can be smoothly moved on the frame 3.

On the other hand, in the case of an earthquake, both piping 1 and pedestal 3 vibrate, so generally pedestal 3 is not immovable, but pedestal 3 can be considered to be always immobile as it moves relative to shoe 2 and piping 1. . Therefore, when the piping 1 (Shu 2) vibrates horizontally at high speed on the pedestal 3 due to an earthquake, etc., the movable cover 5 vibrates horizontally, and the movable plate 8 also moves horizontally inside the fixed box 6. vibrate in the direction. Since the speed of this vibration is high, a high-velocity viscous body 11 is placed between the movable plate 8 and the fixed plate 9.
As a result, the viscous shearing resistance force exerted on the movable plate 8 by the viscous body 11 increases, and the relative vibration between the pipe 1 (shu 2) and the frame 3 is greatly suppressed. Even if the pipe 1 (shu 2) vibrates (moves) or rotates in the vertical direction, the movable lid 5 can be moved vertically and rotated to the shew 2 via the slide member 14 and pin joint 12. Due to the movable arrangement, the movable lid 5 is in an immovable state, and the movable plate 8 and the fixed plate 9 are also in an immovable state.

As described above, according to this embodiment, even if the structure 1 (shu 2) vibrates (moves) or rotates in the vertical direction, the fixed plate 9 and the movable plate 8 remain in an immobile state, and their functions are not impaired. It is effective in suppressing vibrations in all directions in the horizontal plane, and its simple structure makes maintenance and inspection easy, and it is highly reliable even during long-term use.

Note that the viscous shear resistance varies depending on the distance between the movable plate 8 and the fixed plate 9, but since the spacer 10 is provided, the distance is maintained substantially constant, and no change occurs in the viscous shear resistance. And the movable lid 5
is movable in the vertical direction with respect to show 2,
The movable plate 8 and the fixed plate 9 are designed so that no force is applied vertically. That is, the movable cylinder 13 can freely move up and down within the center hole of the movable plate 8, and the fixed plate 9
can freely move up and down within the fixed box 6. As a result, deformation of the spacer 10 and change in the distance between the movable plate 8 and the fixed plate 9 do not occur.

Further, in the above embodiment, the fixed box 6, the movable plate 8,
Although the fixed plate 9, the cylindrical jig 15, the movable cylinder 13, etc. have been described as being circular, they do not necessarily have to be circular and may be of any shape such as a square. The movable lid 5, movable cylinder 13, cylindrical jig 15, movable plate 8, fixed plate 9, and fixed box 6 can be disassembled and assembled by fitting them into each other, so handling including maintenance and inspection is extremely easy. It's easy. Also, cylindrical jig 1
5 is used to easily insert the plates 8 and 9 into the movable cylinder 13, but does not necessarily need to be provided.

Further, in the above embodiments, the case where the viscous damper is applied to piping has been explained, but the viscous damper of the present invention can be used as a movable part instead of a shoe in structures other than piping frame systems, such as bridges and other structures that are easily affected by thermal expansion and contraction. It can also be used in other applications where it is used as a fixed part instead of a pedestal.

〔Effect of the invention〕

Since the present invention is configured as described above, even if the structure (shu) vibrates (moves) or rotates in the vertical direction, the fixed plate and the movable plate remain stationary.
The function is not impaired, it is effective in suppressing vibration in all directions in the horizontal plane, and the structure is simple, so maintenance and inspection are easy and it is highly reliable even during long-term use.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an embodiment of a viscous damper for a structure frame according to the present invention, FIG. 2 is a partial side view of the main part of FIG. 1 in cross section, and FIG. 3 is a main part of FIG. 1. FIG. 1... Piping, 2... Shuttle, 3... Frame, 4...
...Sliding means, 5...Movable lid, 5a...Joining member, 6...Fixed box, 7...Reinforcement plate, 8...Movable plate, 9...Fixed plate, 10...Spacer, 11...
Viscous body, 12... Pin joint, 13... Movable cylinder, 14... Slide member, 15... Cylindrical jig, 16... Adjustment screw.

Claims (1)

[Scope of Claims] 1. A viscous damper for a structure frame installed in a structure frame system in which a structure 1 that undergoes thermal expansion and contraction is supported by a frame 3 so as to be movable in the horizontal direction via a shoe 2. a fixed box 6 fixed to the pedestal 3 and housing the viscous body 11; a fixed box 6 coupled to the shoe 2 so as to be movable in the vertical direction with respect to the shoe 2 and rotatably swingable, and to be coupled to the shoe 2 in a horizontal direction together with the structure 1; a movable lid 5 placed on the fixed box 6 so as to be movable in the fixed box 6; and a fixed lid 5 placed in the fixed box 6 so as to be movable in the fixed box 6; A viscous structure for a structure frame comprising a plate 9 and a movable plate 8 which is immovable in the horizontal direction with respect to the movable lid 5 and is provided on the movable lid 5 alternately with the fixed plate 9 so as to have a gap. damper. 2. Either one or both of the fixed plate 9 and the movable plate 8 are movable in the vertical direction with respect to the fixed box 6 and movable in the vertical direction with respect to the movable lid 5, respectively. The viscous damper for a structure frame according to item 1.