JP6534025B2 - Sliding isolation mechanism and ceiling structure - Google Patents

Description

  The present invention relates to a sliding seismic isolation mechanism that is installed between a frame of a building and a ceiling material, and uses a ceiling material or a device installed on the ceiling material as a seismic isolation target.

Conventionally, a sliding plate (lower plate) is fixed on a structural floor, and a sliding plate (upper plate) is stacked on the lower plate, and the upper plate can slide on the lower plate. In the seismic isolation mechanism, a sliding isolation mechanism is known that reduces the displacement and residual displacement of the upper plate when an earthquake occurs by connecting the structural floor and the upper plate with a restoring spring such as a constant load spring. (See, for example, Patent Document 1).
If a seismic isolation floor using such a sliding seismic isolation mechanism is installed in, for example, an operating room of a hospital, many applications are expected because medical activities can be continued even if an earthquake occurs.

JP, 2013-064418, A

  By the way, in the operating room of a hospital, a shadowless lamp, a monitor, etc. are suspended from a ceiling, and when an earthquake occurs, it is expected that these shadowless lamps, a monitor, etc. will shake greatly. For this reason, in order to continue medical activities even if an earthquake occurs, it is necessary to reduce the shaking of these operating lights and monitors, and seismic isolation of the ceiling is also desired.

  Therefore, the present invention has an object to provide a sliding seismic isolation mechanism capable of reducing the vibration of equipment (a seismic isolation target) attached to a ceiling such as a surgical light and a monitor when an earthquake occurs. I assume.

In order to achieve the above object, the sliding base isolation mechanism according to the present invention is fixed to a housing of a building and supported from below by a supporting part horizontally projecting from the housing toward the inside of the room and the supporting part. , a slidable ceiling material on the support part via a sliding member, wherein the precursor or the supporting part and connecting the ceiling material, comprising a displacement relative to the support portion of the ceiling material from restorable elastic material comprising a restoring member, and not provided with the vibration control mechanism for absorbing the relative displacement between the ceiling member and the support portion, the ceiling material, have a portion exposed to said chamber below said support portion The vertical load is supported only by the support portion .
Further, the ceiling structure according to the present invention is fixed to a housing of a building, and a supporting portion horizontally projected from the housing toward the inside of the room, supported from the lower side by the supporting portion, and sliding on the supporting portion And a restoration material made of an elastic body capable of restoring the displacement of the ceiling material with respect to the support portion, the ceiling material being slidable through the material, and the casing or the support portion being connected to the ceiling material. not provided with a vibration control mechanism for absorbing the relative displacement between the ceiling member and the support portion, the ceiling material, have a portion exposed to said chamber below said support portion, a vertical load is the support It is characterized by being supported only by

  In the present invention, the ceiling material can slide on the support portion and the restoration material capable of restoring the displacement of the ceiling material relative to the support portion is provided, thereby reducing the swing of the ceiling material when an earthquake occurs. it can. And since a ceiling material has the part exposed indoors, when an earthquake generate | occur | produces by attaching a seismic isolation subject to this part, it can reduce the shake of a seismic isolation subject. For example, in operating rooms and the like, by attaching a shadowless lamp or monitor to the ceiling material exposed to the room, medical activities can be continued even if an earthquake occurs, and the shadowless lamp or monitor caused by the earthquake Etc. can be prevented.

Further, in the sliding base isolation mechanism according to the present invention, in the ceiling material, an outer peripheral portion in plan view is positioned above the support portion via the sliding member, and a lower surface of a central portion in plan view is exposed to the room It may be done.
Moreover, in the sliding base isolation mechanism according to the present invention, the restoration material may be provided above the ceiling material.
Further, in the sliding base isolation mechanism according to the present invention, the restoration material is configured to be able to restore the displacement of the ceiling material with respect to the support portion using a spring reaction force of a constant load spring.
The constant force spring can deform the ceiling material with a constant spring reaction force regardless of the displacement amount of the ceiling material with respect to the support portion because the spring reaction force can be deformed with a constant spring reaction force without depending on the deformation amount. The ceiling material can be restored to the original position because the spring reaction force for restoring the ceiling material to the original position is not larger or smaller than the optimum value.

  Since the ceiling material can slide on the support portion and the restoration material capable of restoring the displacement of the ceiling material relative to the support portion is provided, it is possible to reduce the swing of the ceiling material when an earthquake occurs. And since a ceiling material has the part exposed indoors, when an earthquake generate | occur | produces by attaching a seismic isolation subject to this part, it can reduce the shake of a seismic isolation subject.

It is a figure which shows an example of the operating room in which the slide base isolation mechanism by embodiment of this invention was installed. It is the sectional view on the AA line of FIG. It is an enlarged view of B part of FIG. It is the CC sectional view taken on the line of FIG.

Hereinafter, a sliding base isolation mechanism according to an embodiment of the present invention will be described based on FIGS. 1 to 4.
As shown in FIG. 1 and FIG. 2, the sliding base isolation mechanism 1 according to the present embodiment is installed in the operating room 12 of the hospital of the building 11 of the earthquake resistant structure and fixed to the beam (housing) 13 of the building 11 The supporting portion 2, the ceiling material 3 installed above the supporting portion 2, the steel plate 4 fixed to the upper surface of the supporting portion 2, and the sliding which is installed on the lower surface of the ceiling material 3 and can slide on the steel plate 4 The material 5 and the restoration material 6 which connects the support part 2 and the ceiling material 3 and restores the horizontal displacement of the ceiling material 3 with respect to the support part 2 are provided.
The operating room 12 by this embodiment is formed in planar view substantially rectangular shape, and the beam 13 is arrange | positioned around an outer edge whole periphery.

As shown in FIG. 3, the support portion 2 is a plate-like member that protrudes from the beam 13 (see FIG. 1) toward the operating room 12, and a support portion base steel 21 that protrudes in a cantilever state from the beam 13. The plate-like support portion finish 22 is attached to the lower end portion of the support portion base steel frame 21.
Referring back to FIGS. 1 and 2, the support 2 has a substantially rectangular outer edge in a plan view, and a substantially rectangular opening 25 is formed in the center. Also, on the upper portion of the support portion 2, wall foundation steel frames 23 of a plurality of grooved steel or the like are erected at intervals in the circumferential direction, and these wall foundation steel frames 23 have upper ends above the operating room 12 Is fixed to the floor slab 14 (see FIG. 1). Further, in the present embodiment, the wall material 24 is attached to the inside of the plurality of wall foundation steel frames 23.

  The ceiling material 3 has a substantially rectangular shape in a plan view, and the outer shape thereof is smaller than the outer shape of the steel plate 4, and has a plurality of ceiling foundation steel frames 31 (see FIG. 3) arranged in a grid shape. It has the plate-like ceiling finish material 32 (refer FIG. 3) stuck on the lower end part of the steel frame 31.

The steel plate 4 is, for example, an embossed steel plate having a substantially rectangular shape in a plan view and substantially rectangular shape in which micro protrusions are projected upward, and the plurality of wall foundation steel members 23 arranged on the upper surface of the support portion foundation steel 21 It is installed inside. In the steel plate 4, an opening 41 having substantially the same size as the opening 25 of the support 2 is formed to overlap the opening 25 of the support 2.
As a result, of the lower surface of the ceiling member 3, the central portion 33 vertically overlapping the opening 25 of the support 2 and the opening 41 of the steel plate 4 is exposed to the room of the operating room 12. Then, a device 15 (see FIG. 1) such as a shadowless lamp or a monitor is attached to a central portion 33 of the lower surface of the ceiling material 3.

  The sliding member 5 is a plate member disposed in a direction in which the plate surface is directed in the vertical direction, and the upper surface 5a (see FIG. 3) is fixed to the lower surface of the ceiling foundation steel frame 31 in the region near the outer edge portion of the ceiling member 3. (Refer to FIG. 3) abuts on the upper surface of the steel plate 4, and in this state, it is configured to be able to slide on the top of the steel plate 4 together with the ceiling member 3. The sliding member 5 may be divided into a plurality of members, and may be fixed to the lower surface of the plurality of ceiling foundation steel frames 31, respectively, or is formed of one member and integrated with the lower surfaces of the plurality of ceiling foundation steel frames 31. It may be fixed to

The restoration material 6 includes a constant load spring 62 housed in a case 61 fixed to the upper surface of the ceiling foundation steel frame 31 of the ceiling material 3, and a wall foundation steel frame 23 standing on the constant load spring 62 and the support portion 2. And a wire 63 connected thereto.
The restoration member 6 allows relative relative movement between the support portion 2 and the ceiling member 3 in the horizontal direction by the deformation of the constant load spring 62.

The restoration material 6 is given a pre-tension force as a preload to the constant load spring 62, and can restrain excessive displacement of the ceiling material 3 with respect to the support portion 2 when an earthquake occurs, and also supports The ceiling material 3 displaced with respect to the part 2 can be restored to the original position.
In the restoration material 6 as described above, the constant load springs 62, in which the plurality of cases 61 are fixed in the vicinity of the outer edge portion of the ceiling material 3 over the entire outer edge portion and accommodated in the plurality of cases 61 respectively, It is connected with the wall foundation steel frame 23 arrange | positioned by the outer periphery by the wire 63, respectively.

Further, in the present embodiment, as shown in FIGS. 1 and 4, the slip isolation mechanism 7 is installed also on the floor portion 16 of the operating room 12. The sliding base isolation mechanism 7 installed on the floor portion 16 comprises a steel plate 71 laid on the upper surface of the floor slab 14 below the operating room 12 (see FIG. 1), and a floor 72 capable of sliding on the upper surface of the steel plate 71. And the floor slab 14 are connected, and the restoration material 73 which restores the horizontal displacement of the floor material 72 with respect to the floor slab 14 is provided.
Such a floor portion 16 can reduce the vibration of the floor material 72 when an earthquake occurs. In the upper part of the floor material 72, the fixtures 17 (see FIG. 1) such as an operating table and the like can be installed.

Next, the operation and effects of the above-described slide and seismic isolation mechanism 1 will be described using the drawings.
In the slide base isolation mechanism 1 according to the present embodiment described above, the ceiling material 3 can slide on the support portion 2 and the restoration material 6 that can restore the displacement of the ceiling material 3 with respect to the support portion 2 is provided. The sway of the ceiling material 3 at the time of occurrence can be reduced. And since the central part 33 of the lower surface of the ceiling material 3 is exposed to the room of the operating room 12, by attaching the device 15 such as a shadowless lamp or a monitor to the central part 33 of the lower surface of the ceiling material 3, When an earthquake occurs, the vibration of the device 15 such as a shadowless lamp or a monitor can be reduced.

  In addition, a constant load spring 62 is used as the restoration member 6, and the constant load spring 62 can be deformed by a constant spring reaction force without depending on the amount of deformation. Regardless of the displacement of the ceiling material 3 relative to 2, the ceiling material 3 can be restored with a constant spring reaction force, and the spring reaction force for restoring the ceiling material 3 to the original position is larger than the optimal value The ceiling material 3 can be reliably restored to the original position because it is not small.

As mentioned above, although embodiment of the slide isolation mechanism by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
For example, in the above embodiment, the slide base isolation mechanism 1 is installed in the operating room 12 of a hospital, but the slide base isolation mechanism 1 may be installed in a room other than the operating room 12 or a building other than a hospital . Moreover, things other than apparatuses 15, such as an operating light and a monitor, may be installed in the ceiling material 3. FIG.
Moreover, in said embodiment, although the operating room 12 is formed in planar view substantially rectangular shape, you may be formed in shapes other than this.
In the above embodiment, the steel plate 4 is installed on the support portion 2 and the sliding member 5 slides on the steel plate 4, but the steel plate 4 is not installed. The sliding member 5 may slide directly on the top of the slider.

  Moreover, in said embodiment, the support part 2 has the support part foundation steel frame 21 and the plate-shaped support part finish material 22, and the ceiling material 3 has the ceiling foundation steel frame 31 and the plate-like ceiling finish material 32, and However, even if the base material of the support portion 2 and the ceiling material 3 is made of a material other than steel, or the exposed portion of the operation room 12 is finished by painting or the like. Good.

Moreover, in said embodiment, although the spring reaction force of the constant load spring 62 is utilized as a restoring force of the restoration material 6, you may utilize the reaction force by elastic bodies other than the constant load spring 62. FIG. In addition, the form of the restoration material 6 and the number of the restoration materials 6 may be set appropriately.
Further, in the above embodiment, the case 61 of the restoration material 6 in which the constant load spring 62 is accommodated is fixed to the ceiling member 3, and the constant load spring 62 and the wall foundation steel 23 erected on the support portion 2 If the ceiling material 3 is configured to be able to slide on the upper portion of the support portion 2 although connected by the wire 63, the constant load spring 62 is connected to the beam member 13 of the building 11 and the frame such as the floor slab 14 It may be Alternatively, the case 61 in which the constant load spring 62 is accommodated may be fixed to the support 2 or the frame of the building 11, and the constant load spring 62 and the ceiling member 3 may be connected by the wire 63.

  Moreover, in said embodiment, although the slide base isolation mechanism 7 is installed also in the floor part 16, it does not need to be installed. Moreover, when a seismic isolation mechanism is installed in the floor part 16, it is good also as a sliding seismic isolation mechanism other than the sliding isolation mechanism 7 of this embodiment.

Reference Signs List 1 sliding base isolation mechanism 2 support portion 3 ceiling material 4 steel plate 5 sliding material 6 restoration material 11 building 12 operating room 13 beam material (housing)
33 Center part (part exposed to the room)
62 Constant Load Spring

Claims (5)

A support fixed to a housing of the building and horizontally projecting from the housing toward the inside of the room;
A ceiling member supported from the lower side by the support and slidable on the support via a sliding member;
And a restoration material made of an elastic body that connects the casing or the support and the ceiling material, and can restore the displacement of the ceiling material with respect to the support.
It does not have a vibration control mechanism that absorbs relative displacement between the support portion and the ceiling material,
The ceiling material is sliding isolation mechanism, characterized in that have a portion exposed to said chamber below said support portion, the vertical load is supported only by the support portion.   The ceiling material is characterized in that an outer peripheral portion in a plan view is located at an upper portion of the support portion via the sliding member, and a lower surface of a central portion in a plan view is exposed to the room. Slip isolation system described.   The said earthquake-resistant material is provided above the said ceiling material, The slide isolation mechanism of Claim 1 or 2 characterized by the above-mentioned.   The said restoration material is comprised so that restoration of the displacement with respect to the said support part of the said ceiling material is possible using the spring reaction force of a constant load spring, It is characterized by the above-mentioned. Sliding seismic isolation mechanism. A support fixed to a housing of the building and horizontally projecting from the housing toward the inside of the room;
A ceiling member supported from the lower side by the support and slidable on the support via a sliding member;
And a restoration material made of an elastic body that connects the casing or the support and the ceiling material, and can restore the displacement of the ceiling material with respect to the support.
It does not have a vibration control mechanism that absorbs relative displacement between the support portion and the ceiling material,
Ceiling structure the ceiling material, which have a portion exposed to said chamber below said support portion, the vertical load is characterized in that it is supported only by the support portion.

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