JP3494507B2 - Elevator pit structure of base-isolated building - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator pit structure installed in a seismic isolated building, and more particularly, to seismic isolation having an oil-filled shock absorber that absorbs impact when an elevator such as a car collides. The elevator pit structure of the building.

[0002]

2. Description of the Related Art In a general elevator, as shown in FIG. 3, a car 1 and a counterweight 2 are attached to both ends of a main rope 11 wound around a sheave 5 of a hoist 4 installed in a machine room 3. By connecting each and operating the hoisting machine 4, the car 1
The counterweight 2 is configured to be raised and lowered in the hoistway 6. The portion of the hoistway 6 below the lowest floor platform 9 is an elevator pit 7. In the elevator pit 7, a car 1 or a counterweight 2 is hoisted in a speed range where an emergency stop device (not shown) operates. In the event of an unexpected situation such as a collision with the floor, an oil-filled shock absorber 8 is installed as a safety device that stops by reducing the impact so as to safely protect passengers in the car.

In the pit structure of this type of elevator, as shown in FIG. 4 which is an enlarged view of the main part of FIG. 3, the depth of the pit, which is the vertical distance from the floor 9 at the lowest floor to the bottom floor of the hoistway 6. Sa L is the oil-filled buffer 8 from the bottom floor 9
Is L1, the stroke of the plunger of the oil-filled shock absorber 8 is L2, and the height of the oil-filled shock absorber pedestal 10 is L3, the axial length of the cylinder accommodating the plunger is considered to be approximately L2. The dimension represented by (1) is required.

L ≧ L1 + 2L2 + L3 (1) On the other hand, as an elevator pit structure of a base-isolated building configured to be supported on a support base of the base-isolated building via a seismic isolation device, Japanese Patent Application Laid-Open No. 62-249880 has been disclosed. The one described is known and is shown in FIG. The support base 17 of the seismic isolated building is formed in a concave shape, and the frame of the elevator pit 7 is formed on the upper part of the support base 17 at a predetermined distance via a seismic isolation device (not shown), and is provided at the bottom of the car 1. An oil filled shock absorber 8 is arranged on the pit floor 12 of the elevator pit 7 corresponding to the shock absorber 15 and a shock absorber receiver 16 arranged on the pit floor 12 of the elevator pit 7 is arranged below the counterweight 2. Then, a shock absorber 14 is provided.

[0005]

The above-described conventional elevator pit structure of a seismic isolated building seismically isolates an elevator composed of the frame of the elevator pit 7 and a hoistway from the support base 17 by a seismic isolation device (not shown). Although it can be supported, since the arrangement of the oil-filled shock absorber 8 is based on the same idea as the general elevator shown in FIG. 3 , the pit depth L shown in the above-mentioned mathematical formula 1 is required also in this case. The excavation work for forming the support base 17 of the seismic isolated building which receives this will become large-scale.

An object of the present invention is to provide an elevator pit structure for a base-isolated building, which enables a shallower pit depth.

[0007]

In order to achieve the above-mentioned object, the present invention supports the body of an elevator pit on a support base of a base-isolated building through a seismic isolation device, and supports the lower part of an elevating body during a collision. In an elevator pit structure of a seismic isolated building where an oil-filled shock absorber that absorbs impact is arranged, a through hole is provided in the pit floor of the elevator pit, and the axially intermediate portion of the oil-filled shock absorber is inserted into this through hole. While supporting the oil-filled shock absorber in this state , the lifting body descends and the oil-filled shock absorber operates.
First, a shock load is received by the support base of the seismic isolated building.

[0008]

The elevator pit structure of a seismic isolated building according to the present invention has an oil-filled shock absorber disposed by inserting an axially intermediate portion into a through hole provided in the pit floor of the elevator pit as described above .
The load during operation of the oil-filled shock absorber is received by the support base of the seismic isolated building.
Since it was not transmitted to the body,
The thickness of the part where the impact load is not applied is thinner than before
Elevator installed in seismically isolated building
The pit depth can be made shallow.

[0009]

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

FIG. 1 is a longitudinal sectional view showing an elevator pit structure of a base-isolated building according to an embodiment of the present invention. In the following description, the same parts as those in the conventional example will be denoted by the same reference numerals, and redundant description will be omitted as appropriate.

Elevating bodies of a car 1 and a counterweight 2 are connected to both ends of a main rope 11 wound around a sheave of a hoisting machine installed in a machine room 3. These hoisting bodies move up and down in the hoistway 6 by the hoist.
An elevator pit 7 is formed at the bottom of the. Building 21 of elevator pit 7 and support base 17 of base-isolated building
A plurality of seismic isolation devices 22 are arranged between the seismic isolation devices 22. The seismic isolation devices 22 support the body 21 of the elevator pit 7 and the elevator side including the hoistway so as to be seismically isolated from the support base 17 of the seismic isolated building. ing. A shock absorber receiver 15 is provided in the lower portion of the elevator body such as the car 1, and an oil filled shock absorber 8 which is a safety device for an elevator is arranged in the lower portion corresponding to the shock absorber receiver 15. This oil-filled shock absorber 8 is installed and supported at its lower part on an oil-filled shock absorber pedestal 10 provided on a support base 17 of a seismic isolated building. The plunger side of the oil-filled shock absorber 8 has a pit at its axial middle portion. It is located in the elevator pit 7 by being inserted into the through hole 23 provided in the floor 12, and faces the shock absorber receiver 15.
The through hole 23 provided in the pit floor 12 is oil-filled so that the seismic isolation device 22 allows the elevator side, which is the frame 21 of the elevator pit 7 and the hoistway, to be seismically isolated from the support base 17 of the seismic isolated building. Insertion part of shock absorber 8 and pit floor 1
The size is such that an annular gap 23a is formed between the two, and contact between the two is prevented in a seismic isolated state.

As described above, the oil-filled shock absorber 8 has the pit floor 12
Since the axially intermediate portion is inserted through the through hole 23 formed in the above, it is assumed that the oil-filled shock absorber 8 is arranged in the same positional relationship with the car 1 as in the conventional case. It is possible to configure the car 1 closer to the car 1 than before. That is, the depth of the elevator pit 7 is the predetermined distance secured between the buffer receiver 15 and the oil-filled buffer 8 with the car 1 positioned on the lowest floor as in the conventional case, and the oil-filled buffer 8 Of the pit depth L0, which is the sum of at least the predetermined distance L1 between the bottom floor 9 of the floor and the plunger, and the stroke L2 of the plunger of the oil-filled shock absorber 8. The pit depth L can be made shallower than the conventional pit depth L as shown in the following equation (2). Therefore, the pit floor 1
2 can be brought closer to the side of the car 1 than in the conventional case, and the pit depth L0 can be made shallower by that amount, and the frame of the elevator pit 7 is accommodated according to this pit depth L0. The support base 17 of the base-isolated building can also be made shallow, and its excavation work can be simplified.

L1 + L2 ≦ L0 ≦ L1 + 2L2 (2) Further, as described above, the oil-filled shock absorber 8 includes the support base 17
Since it is supported on the oil-filled shock absorber pedestal 10 and the axial intermediate portion is inserted into the through hole 23 formed in the pit floor 12 through the gap 23a, the strength of the pit floor 12 is smaller than in the conventional case. Therefore, the thickness can be reduced. In other words, when the oil-filled shock absorber 8 operates, the oil-filled shock absorber 8 is conventionally supported by the pit floor 12, so that the shock received by the oil-filled shock absorber 8 acts on the pit floor 12, and The pit floor 12 had to be thick and strong so as to withstand an impact load caused by the weight of the car 1 or the weight of the counterweight 2, etc. In contrast, in the present embodiment, the shock received by the oil-filled shock absorber 8 However, since the impact load is not transmitted to the pit floor 12, the thickness T1 of the pit floor 12 can be made thinner than the conventional pit floor thickness T. In addition, since the impact load generated when the oil-filled shock absorber 8 operates is received by the support base 20 of the seismic isolated building and does not act on the pit floor 12, the balance weight 2 side is not provided with an emergency stop device. You can

FIG. 2 is a longitudinal sectional view showing an elevator pit structure of a base-isolated building according to another embodiment of the present invention.

A plurality of seismic isolation devices 22 are arranged between the skeleton of the elevator pit 7 and the support base 17 of the seismic isolated building.
The elevator side composed of 1 and the hoistway is seismically supported by a support base 17 of the seismic isolated building. A shock absorber receiver (not shown) is provided in the lower portion of the elevator car 1 or the like, and a through hole is formed in the lower pit floor 12 facing the shock absorber receiver, and an elevator pit is formed in the through hole. A concave support member 24 that is dropped from the 7 side to the support base 17 side below is arranged. This support member 24 is fixed to the pit floor 12 by a suitable means, and an oil-filled shock absorber 8 which is a safety device for an elevator is arranged in the recess thereof. The oil-filled shock absorber 8 is also supported by a suitable means. Two
It is fixed at 4. The oil-filled shock absorber pedestal 10 is installed on the support base 17 of the seismic isolated building below the oil-filled shock absorber 8, but a gap 23b is formed between the lower portion of the support member 24 and the oil-filled shock absorber pedestal 10. ing. This gap 23
In b, the seismic isolation device 22 enables the elevator side including the frame 21 of the elevator pit 7 and the hoistway to be seismically isolated from the support base 17 of the seismic isolated building. It has been blocked. Since other configurations are similar to those of the previous embodiment, the same components are designated by the same reference numerals and detailed description thereof will be omitted.

In this embodiment as well, a through hole is formed in the pit floor 12, and the axially intermediate portion of the oil-filled shock absorber 8 is inserted into the through-hole and positioned to support the oil-filled shock absorber 8. Therefore, the oil-filled shock absorber 8 is supported more on the support base 17 side of the seismic isolated building than on the pit floor 12. Therefore, according to the conventional concept, the pit floor 12 is fixed to the support base 1
However, according to the present embodiment, the position of the pit floor 12 is at least the predetermined distance L1 between the lowest floor floor 9 and the plunger, as in the previous embodiment.
And the pit depth L0, which is the sum of the stroke L2 of the plunger of the oil-filled shock absorber 8, and the pit floor 12 is brought closer to the car 1 side than in the conventional case, as shown in the equation (2). Can be shallow. Also, the support base 17 of the base-isolated building that houses the frame 21 of the elevator pit 7 can be made shallow according to the pit depth L0, and the excavation work can be simplified.

Further, in the elevator pit structure according to the present embodiment, as described above, in the steady state or seismic isolation state,
A gap 23 is formed between the lower portion of the support member 24 and the oil-filled shock absorber pedestal 10.
b is formed, and the seismic isolation device 22 enables the elevator side, which includes the frame 21 of the elevator pit 7 and the hoistway, to be isolated from the support base 17 of the seismic isolated building. Therefore, the support member 24 has a strength capable of holding and supporting the own weight of the oil-filled shock absorber 8 in a steady state or a seismic isolation state. However, when the elevator body such as the car 1 is lowered to operate the oil-filled shock absorber 8, the support member 24 is deformed by the impact load at that time, and the support member 24 or the lower portion of the oil-filled shock absorber 8 is oil-filled shock absorber. It contacts the pedestal 10.
At this time, the oil-filled shock absorber 8 is in the same state as being supported by the oil-filled shock absorber pedestal 10, and the subsequent impact load or the like is received by the oil-filled shock absorber pedestal 10 instead of the pit floor 12. The thickness T1 of the pit floor 12 can be reduced as compared with the conventional example in which the oil-filled shock absorber 8 is supported by the pit floor 12. Instead of the supporting member 24 as described above, the axially intermediate portion of the oil-filled shock absorber 8 is inserted into the through hole formed in the pit floor 12, and the oil-filled shock absorber 8 is placed in this state.
Can also be obtained by supporting the pit on the pit floor 12 with some support structure. Also, as mentioned above, in the steady state or seismic isolation state,
Since the oil-filled shock absorber 8 is supported by the pit floor 12 via the support member 24 and the gap 23a is formed between the lower portion of the support member 24 and the oil-filled shock absorber pedestal 10, the building shakes due to an earthquake or the like. In such a case, the oil-filled shock absorber 8 sways like the body 21 of the elevator pit 7 via the support member 24, so that the relative position between the oil-filled shock absorber 8 and the shock absorber receiver 15 or other elevator equipment does not change. There are advantages.

In each of the above embodiments, the support base 17 of the seismic isolated building is formed flat and the support base 1 is
Although the oil-filled shock absorber pedestal 10 is arranged on the base 7, the recess is formed in the support base 17 at a portion corresponding to the oil-filled shock absorber pedestal 10 so that the oil-filled shock absorber pedestal 10 can be housed in this recess. You may arrange.

[0019]

As described above , according to the present invention , oil
The load during operation of the shock absorber is received by the support base of the seismic isolated building.
Since it was not transmitted to the body,
The thickness of the part where the impact load is not applied is thinner than before
It is possible to reduce the depth of the elevator pit installed in the seismic isolated building . Further, Ru can be shallower support base seismic isolation building housing the precursor of the elevator pit to fit the pin <br/> Tsu preparative depth. That conclusion
As a result , the excavation work can be simplified.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an elevator pit structure of a base-isolated building according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing an elevator pit structure of a base-isolated building according to another embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a general elevator.

4 is an enlarged view of a pit structure in the elevator shown in FIG.

FIG. 5 is a vertical sectional view showing an elevator pit structure of a conventional base-isolated building.

[Explanation of symbols]

1 basket Two counterweights 6 hoistway 7 elevator pits 8 oil filled shock absorber 9 bottom floor 10 Oil-filled shock absorber pedestal 12 pit floor 17 Support base 21 skeleton 22 Seismic isolation device 23 Through hole 23a, 23b gap 24 Support member L0 pit depth

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Seki Inventor Hideaki Seki 1070 Ichige, Hitachinaka City, Ibaraki Hitachi Ltd. Mito Plant (56) References JP-A-4-350273 (JP, A) JP-A-11- 165964 (JP, A) Actual development Sho 59-183470 (JP, U) Japanese Patent Publication 2-62672 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B66B 5/28 B66B 7 / 00 E04H 9/02 301 E04H 9/02 331

Claims (7)

(57) [Claims] 1. An elevator for a seismic isolated building, in which a frame of an elevator pit is supported by a seismic isolation device on a support base of the seismic isolated building, and an oil-filled shock absorber for absorbing a shock at the time of a collision is arranged at a lower portion of a lifting body. In the pit structure, a through-hole is provided in the pit floor of the elevator pit, and the oil-filled shock absorber is supported while the axially intermediate portion of the oil-filled shock absorber is inserted into the through-hole, and the lifting body descends. When the above oil-filled shock absorber operates
First, an elevator pit structure for a base-isolated building, characterized in that an impact load is received by the support base of the base-isolated building. 2. The oil filling according to claim 1, wherein
An elevator pit structure for a seismic isolated building, characterized in that a shock absorber is fixed to a support base of the seismic isolated building. 3. The penetration according to claim 1, wherein
From the hole to the support base side, attach the support member of the oil-filled shock absorber.
Drop it in and support it on the pit floor,
The part dropped from the through hole to the support base side
When the above oil-filled buffer operates when it supports the oil-filled buffer.
The above-mentioned support member or oil-filled shock absorber is used for supporting the seismic isolated building.
The elevator pit structure of a base-isolated building characterized by contact with the ground. 4. The oil filling according to claim 3,
Seismic isolation should be provided between the axially intermediate part of the shock absorber and the support member.
At times, the intermediate portion of the oil-filled shock absorber in the axial direction interferes with the support member.
The elevator pit structure of a base-isolated building, which is characterized by the fact that there are only gaps . 5. The oil-filled shock absorber receiving seat according to claim 3 , wherein an oil-filled shock absorber receiving seat is provided on the support base below the oil-filled shock absorber, and the insulating member is provided between the oil-filled shock absorber receiving seat and the support member. Elevator pit structure of base-isolated building characterized by forming a gap that can be isolated by seismic device. 6. The support member according to claim 3 , wherein the supporting member is deformed by an impact load when the elevating body collides with the oil-filled shock absorber, and a lower portion of the oil-filled shock absorber serves as the support base. The elevator pit structure of a base-isolated building characterized by being in contact with each other. 7. The support member according to claim 5 , wherein the support member is deformed by an impact load when the elevating body collides with the oil-filled buffer, and a lower portion of the oil-filled buffer is provided with the oil-filled buffer. An elevator pit structure for a base-isolated building characterized by being supported by contact with a container seat.