JPH10316351A - Escalator for base isolation building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an escalator from being dropped or broken even when horizontal displacement occurs between an upper floor and a lower floor by providing a rotary shaft at one end of the escalator provided with a rotary device at the other end, and rotatably arranging the rotary shaft on the other skeleton of a base isolation floor or the upper floor. SOLUTION: When a rotary shaft 2 is inserted and installed into an installation hole a2, an escalator 1 is made rotatable centering on its upper end section. A rotary device 3 is arranged on the bottom face of the lower end section of an escalator frame 11. The horizontal displacement by an earthquake rarely occurs in the X-direction only or in the Y-direction only, and it is fully considered to occur in both directions. When the escalator 1 is moved in the X- direction, the rotary device 3 at the lower end section of the escalator 1 is rotated so that the inter-fulcrum distance between bath the upper and lower end sections of the escalator 1 is not changed, and the rotary device 3 is moved back and forth along a rail 32 to invariably keep the inter-fulcrum distance constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an escalator for a base-isolated building.

[0002]

2. Description of the Related Art A conventional escalator generally has a structure in which the upper end is mounted on a beam on an upper floor and the lower end is mounted on a beam on a lower floor via a claw, and the claw portion is fixed with an anchor.

[0003]

When an escalator having such a structure is installed for a base-isolated building having a seismic isolation device in the middle level, horizontal displacement occurs between the upper floor and the lower floor. Therefore, there is a risk that the anchor to which the escalator is fixed is damaged and the escalator falls.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. In a base-isolated building, even if horizontal displacement occurs between an upper floor and a lower floor, an escalator may fall. An object of the present invention is to provide an escalator for a base-isolated building that has no risk of being damaged.

[0005]

In order to achieve the above object, an escalator for a base-isolated building according to the present invention is provided with a turning device at one of the upper end and the lower end of the escalator. Are provided with supporting legs, and the supporting legs are arranged so as to be able to run on a rail laid in the longitudinal direction of the escalator on either the base-isolated floor or the upper floor, and the other end of the escalator is provided. Is provided with a rotating shaft, and the rotating shaft is rotatably arranged on the other frame of the seismic isolation floor or the upper floor. Further, the other end of the escalator is arranged on the other frame of the seismic isolation floor or the upper floor via a sliding bearing. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0006]

First Embodiment <A> Seismic Isolation Building A building using the escalator of the present invention is a building having a seismic isolation device C provided on an intermediate floor between an upper floor A and a lower floor B as shown in FIG. It is. In such a building, since the horizontal displacement occurs between the upper floor A and the seismic isolation floor D as described above, the escalator having the conventional structure cannot be used as it is.

<B> Structure of the upper end of the escalator As shown in FIGS. 1 and 2, the escalator 1 is mounted on an escalator frame 11, and a rotating shaft 2 having a vertical axis is provided on the bottom surface of the upper end of the escalator. Has been fixed.

The rotating shaft 2 has sufficient strength to support the upper part of the escalator 1. In addition, various shapes such as a columnar shape and a pin shape having a tapered tip can be considered, but the shape is not particularly limited.

<C> Mounting structure of upper floor On the upper floor A side, a concrete is added to construct a horizontal shelf a1. An installation hole a2 for inserting the rotation shaft 2 of the escalator 1 is provided on the upper surface of the shelf a1. The installation hole a2 has an inner diameter slightly larger than the rotation shaft 2, and its inner surface is covered with a steel plate or the like.

As shown in FIG. 1, by inserting the rotary shaft 2 into the installation hole a2, the escalator 1 can rotate around its upper end. It is also conceivable to provide a bearing between the rotating shaft 2 and the installation hole a2. In addition, the holding mechanism of the rotating shaft 2 is not particularly limited as long as the rotating shaft 2 can be rotatably held.

<4> Structure of the lower end of the escalator A swivel device 3 is provided on the bottom surface of the lower end of the escalator frame 11, as shown in FIGS. The swivel device 3 may be a known device such as a structure in which disks are rotatably arranged at both ends of a shaft via bearings or the like so as to face each other.

A support leg 31 is provided on the bottom surface of the turning device 3. The support leg 31 is installed so as to be able to run on a rail 32 described later. The shape of the support leg 31 is a rail 32
There is no particular limitation as long as the escalator 1 does not fall off, but sufficient strength to support the lower portion of the escalator 1 is provided.

<E> Mounting structure of seismic isolation floor On the seismic isolation floor D, as shown in FIGS. 1 and 2, an additional concrete is added to construct an escalator room d1.
A rail 32 is laid on the upper surface of the escalator room d1 in the longitudinal direction of the escalator 1. In this embodiment, two rails 32 are laid in parallel. Also, the rail 32 has a value of 2 corresponding to the maximum shaking during the earthquake.
The length should be more than double.

<F> Gap equivalent to the amount of shaking Between the inner surface of the side wall of the escalator room d1 on the seismic isolation floor D and the lower end of the escalator 1, a gap S1 equivalent to the amount of shaking during an earthquake, and the escalator 1 due to the shaking. A gap S2 is provided in which the lower end does not come into contact with the inner surface of the side wall of the escalator room d1 when is rotated.

A gap S3 is also provided between the side of the skeleton of the upper floor A and the upper end of the escalator 1 so that when the escalator 1 rotates due to shaking, the upper end does not contact the skeleton of the upper floor A.

These gaps S1 to S3 are gaps in which the upper and lower ends of the escalator 1 do not come into contact with the side surfaces of the escalator room d1 and the frame of the upper floor A, assuming the maximum shaking during an earthquake. In addition, the upper portions of these gaps are covered and covered with the transfer plates 4a and 4b having a sufficient length to avoid danger to the user.

<G> Operation during an earthquake As shown in FIG.
It is configured to be rotatable around. The lower end of the escalator 1 can be turned horizontally by the turning device 3 and can be moved in the longitudinal direction of the escalator 1 along the rail 32 by the running function of the support leg 31.

When a horizontal displacement due to seismic force occurs on the seismic isolation floor D, the upper end of the escalator 1 rotates freely to absorb the interlayer displacement in the X direction. The lower end of the escalator 1 moves along the rail 32 to absorb interlayer displacement in the Y direction.

The horizontal displacement due to the seismic force is rare in the case of only the X direction or only the Y direction, and it is sufficiently considered that the displacement occurs in both directions. Therefore, when the escalator 1 moves in the X direction, the escalator 1 moves up and down. In order to keep the distance between the fulcrums at both ends unchanged, the distance between the fulcrums is always kept constant by rotating the revolving device 3 at the lower end of the escalator 1 and moving back and forth along the rail 32 at the same time.

Therefore, during the earthquake, the seismic isolation floor D and its upper floor A
Even if horizontal displacement occurs between the escalator 1 and the upper and lower ends, the escalator 1 swings in a range where it does not contact the skeleton of the seismic isolation floor D and the upper floor A, so that the escalator 1 is not damaged or dropped. .

In the present embodiment, the escalator 1 is equipped with the rotating shaft 2 at the upper end and the turning device 3 and the support leg 31 at the lower end. The supporting leg 31 may be provided with the rotating shaft 2 at the lower end, or the turning device 3 and the supporting leg 31 at both upper and lower ends.

[0022]

Second Embodiment A second embodiment shown in FIGS.
5 shows a case in which a sliding bearing 5 is provided at the upper end of the escalator 1 instead of the rotating shaft 2. The sliding bearing 5 comprises a sliding body 51 provided on the bottom surface or the like of the upper end of the escalator frame 11, and a sliding face plate 52 laid on the upper surface of the box a3 built on the upper floor A.

The sliding face plate 52 only needs to be a smooth and sufficiently strong surface, and does not require a special structure. Sliding body 5
1 can be widely adopted as long as it is a disk, a cylinder, a hemisphere, a cone having a downward point, a pyramid, a wheel, or any other shape that is easy to slide. Then, the sliding body 51 is slidably mounted on the sliding face plate 52.

The sliding body 51 slides and the box a3
A known damper 6 or the like may be disposed at an appropriate position between the sliding body 51 and the inner surface of the side wall of the box a3 so as not to collide with the inner surface of the side wall of the box a3. Further, a structure in which the sliding support 5 is provided at the lower end of the escalator 1 and the turning device 3 or the like is provided at the upper end may be used.

In the case of this embodiment, the escalator 1
The upper and lower ends swing. Therefore, the interlayer displacement is borne by the two layers, which is half of the maximum swing of the displacement of each support point, and the gaps S4 to S7 corresponding to the swing amount need only be half or more of the maximum swing.

[0026]

[Effect of the present invention] The escalator for a base-isolated building according to the present invention is as described above. Therefore, even if a horizontal displacement occurs between a base-isolated floor and its upper floor during an earthquake, the escalator may be damaged or fall. There is no need to worry about damaging users.

[Brief description of the drawings]

FIG. 1 is an explanatory view from the side of Embodiment 1 of the present invention;

FIG. 2 is an explanatory view from the plane.

FIG. 3 is an explanatory view from the side of Embodiment 2 of the present invention;

FIG. 4 is an explanatory view from the plane.

FIG. 5 is an illustration of a building with a seismic isolation device interposed.

Claims (2)

[Claims] An escalator is installed between a seismic isolation floor and an upper floor of the building having a seismic isolation device on an intermediate floor, and a turning device is provided on one of the upper and lower ends of the escalator. The turning device is provided with supporting legs, and the supporting legs are arranged so as to be able to travel on a rail laid in the longitudinal direction of the escalator on either the base-isolated floor or the upper floor, and an escalator. An escalator for a base-isolated building, wherein a rotary shaft is provided at the other end of the escalator, and the rotary shaft is rotatably disposed on the other frame of the base-isolated floor or the upper floor. 2. An escalator is installed between a seismic isolation floor and an upper floor thereof in a building having a seismic isolation device on an intermediate floor, and a turning device is provided on one of the upper end and the lower end of the escalator. The turning device is provided with supporting legs, and the supporting legs are arranged so as to be able to travel on a rail laid in the longitudinal direction of the escalator on either the base-isolated floor or the upper floor, and an escalator. An escalator for a base-isolated building, characterized in that the other end of the escalator is disposed on the other frame of the base-isolated floor or the upper floor via a sliding bearing.