JP2009298531A - Seismic control structure of elevator shaft - Google Patents

Abstract

The present invention can prevent an elevator shaft and a casing from colliding with each other during an earthquake and can be arranged in a narrow gap.
A building 2 in which a base isolation layer M is provided on an intermediate floor, and an elevator shaft 1 of an elevator 4 penetrating the base isolation layer is suspended from a beam member 6 above the base isolation layer, is an elevator. A seismic damper 10 is provided between the side surface 1d of the shaft 1 and the lower-layer housing 2A of the seismic isolation layer M. The damping damper 10 is disposed so that the damping direction of the oil damper 11 is inclined with respect to the side surface 1d of the elevator shaft 1, and is rotatably attached to the elevator shaft 1 and the housing 2A.
[Selection] Figure 1

Description

  The present invention relates to a vibration control structure for a suspended elevator shaft provided in a building having a seismic isolation layer on an intermediate floor.

Conventionally, in a middle-rise base-isolated building that has a base isolation layer on the middle floor of the building, the elevator is installed vertically through the base isolation layer, and the lower-floor elevator shaft is suspended from the upper floor of the cantilever ( It is a hanging structure that forms a cantilever (see, for example, Patent Document 1).
In such a building, when an earthquake occurs, the lower-floor frame is directly subject to vibration from the seismic isolation layer, but the upper-floor frame is suppressed by the seismic isolation layer. Thus, a relative displacement in the horizontal direction occurs. Therefore, a predetermined clearance is secured between the suspended elevator shaft and the surrounding housing so that the elevator shaft does not collide with the housing.
JP-A-11-11821

However, the conventional elevator shaft structure has the following problems.
In other words, a suspended elevator shaft has a brace structure and a highly rigid cantilever structure, but the elevator shaft is often attached to a small beam on the upper floor with a small rotational rigidity. There was a risk of vibration (rocking phenomenon). In particular, when the elevator shaft is suspended for a long time, when an earthquake with a long-period component is prominent, the vibration response acting on the elevator shaft is amplified over a long period of time, increasing the displacement of the elevator shaft. There was a problem of colliding with a lower-level housing or damaging cables or the like arranged around the elevator shaft.

  In addition, in order to avoid the collision between the elevator shaft and the lower floor housing, it is necessary to widen the clearance around the shaft, but there is a disadvantage that the floor area on the lower floor is reduced accordingly. There was room for improvement.

  The present invention has been made in view of the above-described problems, and provides a vibration control structure for an elevator shaft that can be disposed in a narrow gap while preventing a collision between the elevator shaft and a housing during an earthquake. Objective.

  In order to achieve the above object, in the elevator shaft damping structure according to the present invention, in a building having a seismic isolation layer on an intermediate floor, the elevator shaft of the elevator provided through the seismic isolation layer is located above the seismic isolation layer. It is an elevator shaft damping structure that is suspended from the beam material, and is equipped with a damping damper between the side of the elevator shaft and the lower-level frame of the seismic isolation layer. It is composed of an oil damper, and is characterized in that the damping direction of the oil damper is arranged in an inclined posture with respect to the side surface of the elevator shaft and is rotatably attached to the elevator shaft and the housing.

In the present invention, a horizontal relative displacement occurs between the suspended elevator shaft supported on the upper floor above the seismic isolation layer and the lower floor housing due to the earthquake, and both vibrate so that they are close to and away from each other. Then, due to the damping performance of the oil damper of the damping damper provided between the elevator shaft and the housing, it can absorb long-period vibration energy that lasts for a long time due to the earthquake and reduce the swing of the elevator shaft. It is possible to prevent the elevator shaft from colliding with the housing.
The oil damper is disposed in an inclined posture with the damping direction obliquely directed with respect to the housing and the elevator shaft, and is rotatably mounted. Therefore, the clearance between both the elevator shaft and the housing due to the relative displacement between the housing and the elevator shaft can be reduced. The cylinder can be expanded and contracted to exhibit a damping function while changing the inclination angle of the oil damper in response to the fluctuation.

  In the elevator shaft damping structure according to the present invention, the elevator shaft of the elevator provided through the seismic isolation layer is suspended from the beam material above the seismic isolation layer in the building having the seismic isolation layer on the intermediate floor. An elevator shaft damping structure that is lowered, and is provided with a damping damper between the side of the elevator shaft and the lower-level frame of the seismic isolation layer, and the damping damper is composed of a diamond-shaped pantograph material and An oil damper provided between a pair of opposed connecting portions of the pantograph material, and the oil damper is disposed with its damping direction directed in the vertical direction, and another pair of opposed connecting portions of the pantograph material is provided It is characterized in that it is rotatably mounted on the elevator shaft and the housing.

In the present invention, a horizontal relative displacement occurs between the suspended elevator shaft supported on the upper floor above the seismic isolation layer and the lower floor housing due to the earthquake, and both vibrate so that they are close to and away from each other. Then, the damping performance of the damping damper consisting of the pantograph material and the oil damper provided between the elevator shaft and the housing absorbs long-period vibration energy that lasts for a long time due to the earthquake and reduces the shaking of the elevator shaft. Therefore, it is possible to prevent the elevator shaft from colliding with the housing.
The seismic damper is equipped with an oil damper that contracts and expands the pantograph material that is rotatably attached to the housing and the elevator shaft, so that both clearance variations due to relative displacement between the elevator shaft and the housing can be reduced. Correspondingly, while the pantograph material is contracted and expanded, the cylinder of the oil damper can be expanded and contracted to exhibit a damping function.

  Further, in the elevator shaft damping structure according to the present invention, the damping damper is attached at a position lower by a length of 2/3 from the fixed end fixed to the beam material in the longitudinal direction of the elevator shaft. Preferably it is.

  In the present invention, since it is supported by the vibration damping damper at a position that is lowered by a length of 2/3 from the hanging position at which the vibration is maximized by the cantilever, the vibration damping effect can be surely exhibited.

  According to the elevator shaft damping structure of the present invention, the vibration due to the relative displacement generated between the elevator shaft and the housing due to the earthquake can be reduced by the damping damper, thus preventing the collision between the elevator shaft and the housing. Can do. In addition, the position of the oil damper provided in the damping damper can be changed and placed in the clearance between the elevator shaft and the housing, and it can be accommodated in a narrow gap. The increase in space can be suppressed and the floor area of the building can be increased. Therefore, for example, even if the clearance is limited in an existing building, there is an effect that it is possible to attach a vibration control damper between the elevator shaft and the housing.

Hereinafter, an elevator shaft damping structure according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a longitudinal sectional view showing a schematic configuration of an elevator shaft installed in a building according to a first embodiment of the present invention, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. 3 is an oil damper. FIG. 4 is a longitudinal sectional view for explaining the operation of the elevator shaft during an earthquake, and is a view corresponding to FIG. 1, and FIG. 5 is a view taken along the line BB in FIG. .

  Reference numeral 1 in FIG. 1 denotes an elevator shaft according to the first embodiment provided in a building 2. As shown in FIG. 1, the building 2 of the present embodiment is an intermediate-layer base-isolated building, and is provided with a base-isolation layer M having a base-isolation device 3 on an intermediate floor. 4 penetrates in the up-down direction and can be moved up and down. The seismic isolation layer M is located on the fourth floor (4F), and the lower floors constitute three floors (1F to 3F). FIG. 1 is a diagram showing the lower floor of the building 2 and the seismic isolation layer M, in which the upper floor is omitted.

  The seismic isolation device 3 has, for example, a circular shape in plan view, and adopts seismic isolation rubber or the like in which steel plates and rubber materials are alternately stacked and the upper and lower ends thereof are sandwiched by upper and lower flanges, and is disposed in the seismic isolation layer M. It is provided in a state of being interposed in the pillar material 5. That is, the main building 2 has a structure in which the vibration in the horizontal direction of the upper floor is attenuated by the seismic isolation layer seismic isolation device 3 of the seismic isolation layer M in the event of an earthquake.

  In the lower floor below the seismic isolation layer M, an elevator installation space (shaft passage R) having a rectangular shape in plan view for arranging the elevator shaft 1 is formed through the housing 2A in the vertical direction. ing.

  The elevator shaft 1 has an upper end (fixed end 1a) attached to a beam member 6 on the upper floor side above the seismic isolation layer M, and a lower end 1b formed as a free end separated from the lower floor frame 2A. The cantilever suspended from 6 is supported. And between the side surface 1d of the elevator shaft 1 and the housing 2A on the lower floor of the seismic isolation layer M, a damping damper 10 is provided.

  As shown in FIG. 1 and FIG. 2, the elevator shaft 1 has a rectangular structure in plan view in which steel materials are combined vertically and horizontally and braces are appropriately arranged, so that two elevators 4A and 4B pass through the inner space. Of the elevator hoistway F, as described above, the fixed end 1a is fixed to the beam 6 on the seismic isolation layer M, and the lower end 1b is a predetermined distance from the pit floor 2C where the elevator pit is provided (for example, 50 mm). A certain clearance S (for example, an interval of 600 mm) is provided around the elevator shaft 1 and a housing 2A such as a beam of each floor facing the shaft passage R.

  The floor edge 1c on the entrance / exit side of the elevator 3 in the elevator shaft 1 closes the clearance S formed between the elevator shaft 1 and the lower casing 2A and moves to communicate with each floor 2B. A sliding floor 7 of the type is provided. The slide floor 7 has an elevator-side end 7 a fixed to the floor edge 1 c of the elevator shaft 1, and the other end 7 b mounted without being fixed on each floor floor 2 B. It is movably provided on the floor 2B. As a result, the slide floor 7 creates a gap between the elevator shaft 1 and the housing 2A even when the elevator shaft 1 swings in the shaft passage R and the clearance S around the elevator shaft 1 changes. The configuration is not allowed.

  The damping damper 10 provided on the elevator shaft 1 is disposed on the damper mounting portions 1A, 1B, 1C, 1D at the four corners of the elevator shaft 1 in a plan view, and a plurality of oil dampers 11, 11,. It is provided. Specifically, a pair of upper and lower oil dampers 11A and 11B are provided in each of the damper mounting portions 1A to 1D in two directions in a plan view as shown in FIG. That is, four oil dampers 11, 11,... Are arranged at one damper mounting portion.

  As for each damper attaching part 1A, 1B arrange | positioned on the opposite side to the entrance / exit 4a side of the elevator 4, a pair of oil damper 11A, 11B is arrange | positioned on each extended line of two sides which comprise a corner | angular part by planar view. . On the other hand, each of the damper mounting portions 1C and 1D arranged on the entrance 4a side of the elevator 4 is on a line connecting the extension of the long side of the two sides constituting the corner and the corner of the casing 2A. And a pair of oil dampers 11A and 11B are arranged to prevent interference with the slide floor 7 described later.

  As shown in FIG. 3, the oil damper 11 is a well-known one that encloses oil in a cylindrical body and causes the cylinder to operate as a piston, and the expansion / contraction direction (attenuation direction P) of the cylinder is the side surface 1d of the elevator shaft 1. Is arranged in an inclined posture. One end (cylinder tip 11a) of the oil damper 11 is rotatably attached to the side surface 1d of the elevator shaft 1, and the other end (base end 11b) is rotatably attached to the housing 2A. That is, the cylinder tip 11a and the base end 11b are ball joints, respectively, and are in a state of being rotatably fitted to a spherical seat 12 having a concave curved surface fixed to the elevator shaft 1 and the housing 2A.

As shown in FIG. 1, a pair of upper and lower oil dampers 11A and 11B has cylinder tips 11a and 11a fixed at substantially the same position of the elevator shaft 1, and the base end 11b of the upper oil damper 11A is positioned from the position of the cylinder tip 11a. Located above, the base end 11b of the lower oil damper 12B is positioned below the position of the cylinder front end 11a, and is arranged in a substantially square shape in a side view in a state of being inclined with respect to each other.
Note that the cylinder tip 11 a is attached to the elevator shaft 1 at a position that is 2/3 lower than the fixed end 1 a in the longitudinal direction of the elevator shaft 1.

  Each oil damper 11 can be arranged in an appropriate inclination posture corresponding to the clearance S around the elevator shaft 1 in a normal time that is not during an earthquake. For example, the oil damper 11 has an inclination angle with respect to the side surface 1d of the elevator shaft 1 ( By reducing the sign θ) shown in FIG. 3, the clearance S is small and the arrangement can be made in a narrow space. Therefore, for example, even when the clearance S is about 200 mm due to vibration during an earthquake, it is possible to select and arrange the oil damper 11 that fits in the gap of 200 mm.

Next, the operation of the elevator shaft 1 provided with the oil damper 12 described above will be described based on the drawings.
As shown in FIG. 4 and FIG. 5, in the main building 2 that is an intermediate-layer base-isolated building, when an earthquake occurs, the upper-level frame is suppressed from vibration by the base-isolated layer M. In addition, the elevator shaft 1 fixedly supported by the beam member 6 on the upper floor and the housing 2A on the lower floor are separated from each other, and the relative position between the side surface 1d of the elevator shaft 1 and the housing 2A is at the time of an earthquake. Horizontal deformation will occur.

  As described above, when the elevator shaft 1 and the housing 2A vibrate so as to come close to and away from each other (in the direction of arrow E) due to the earthquake, the oil damper 11 of the vibration damper 10 provided between the elevator shaft 1 and the housing 2A. The damping performance absorbs long-period vibration energy that continues for a long time due to an earthquake and can reduce the shake of the elevator shaft 1, so that the elevator shaft 1 can be prevented from colliding with the housing 2 </ b> A.

  A plurality of oil dampers 11, 11,... Provided in the damper mounting portions 1 </ b> A to 1 </ b> D (see FIG. 2) of the elevator shaft 1 are in a damping direction P (see FIG. 3) with respect to the housing 2 </ b> A and the elevator shaft 1. ) Is disposed in an inclined posture and is rotatably mounted by a ball joint, so that the variation of both clearances S due to relative displacement between the elevator shaft 1 and the housing 2A can be accommodated. While changing the inclination angle, the cylinder can expand and contract to exhibit a damping function.

  In addition, since this damping damper 10 is provided in the corner | angular part (damper attaching part 1A-1D) of the elevator shaft 1, it respond | corresponds to the displacement of all horizontal directions irrespective of the direction of the horizontal displacement of the elevator shaft 1. FIG. Vibration can be damped.

As described above, in the elevator shaft damping structure according to the first embodiment, the vibration caused by the relative displacement generated between the elevator shaft 1 and the housing 2A due to the earthquake can be reduced by the damping damper 10. A collision between the elevator shaft 1 and the housing 2A can be prevented.
Further, the position of the oil damper 11 provided in the vibration damping damper 10 can be changed and disposed in the clearance S between the elevator shaft 1 and the housing 2A, and can be accommodated in a narrow gap. An increase in the space of the service passage R can be suppressed, and the floor area of the building can be increased. Therefore, for example, even if the clearance is limited in an existing building, there is an effect that it is possible to attach a vibration control damper between the elevator shaft and the housing.

Next, other embodiments will be described with reference to the accompanying drawings. However, the same or similar members and parts as those of the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted. A configuration different from the embodiment will be described.
FIG. 6 is a longitudinal sectional view showing a schematic configuration of an elevator shaft installed in a building according to the second embodiment, FIG. 7 is a view taken along the line CC of FIG. 6, and FIG. It is a longitudinal cross-sectional view for demonstrating an effect | action, Comprising: The figure corresponding to FIG. 6, FIG. 9 is the DD arrow line view shown in FIG.

  As shown in FIGS. 6 and 7, the vibration damping damper 20 according to the second embodiment includes a rhombus-shaped pantograph material 21 and an oil damper between a pair of connecting portions 21 b and 21 b opposed to the pantograph material 21. 22 has a structure in which the horizontal movement is converted into the vertical direction, and twice the horizontal movement is also applied in the vertical direction. That is, in the first embodiment described above, a pair of oil dampers 11A and 11B (see FIG. 1) is provided. Instead, in the second embodiment, the pantograph material 21 and the oil are used. The damper 22 is combined.

  Specifically, the pantograph member 21 is formed by connecting rod-shaped support bars 21a in a rhombus shape by connecting portions 21b, 21b, 21c, and 21c having a pin structure or the like, and a pair of opposing connecting portions 21b and 21b is an oil. The dampers 22 are connected. That is, the pantograph material 21 is contracted and expanded by the cylinder expansion / contraction of the oil damper 22.

And the damping damper 20 arrange | positions the oil damper 22 with the damping direction (cylinder expansion / contraction direction) facing up and down, and both ends (cylinder tip 22a, base end 22b) of the oil damper 22 of the pantograph material 21 are arranged. The other pair of opposing connecting portions 21c, 21c that are not connected is rotatably attached to the elevator shaft 1 and the housing 2A by ball joints, as in the first embodiment described above.
In addition, since the attachment positions of these damping dampers 20 are the positions of the damper attachment portions 1A to 1D at the planar viewing corners of the elevator shaft 1 as in the first embodiment, detailed description thereof is omitted.

As shown in FIGS. 8 and 9, in the second embodiment configured as described above, a suspended elevator shaft 1 supported on the upper floor above the seismic isolation layer by the earthquake and the lower floor housing When a relative displacement in the horizontal direction occurs between the two shafts 2A and vibrates so that both are close to and away from each other (in the direction of arrow E), the pantograph member 21 and the oil damper 22 provided between the elevator shaft 1 and the housing 2A The damping performance of the seismic damper 20 comprising the above structure absorbs long-period vibration energy that lasts for a long time due to the earthquake and can reduce the swing of the elevator shaft 1, thereby preventing the elevator shaft 1 from colliding with the housing 2 </ b> A. be able to.
And since the damping damper 20 is provided with the oil damper 22 which contracts and expands the pantograph material 21 rotatably attached to the housing 2A and the elevator shaft 1, the relative displacement between the elevator shaft 1 and the housing 2A is provided. The cylinder of the oil damper 22 can be expanded and contracted to exhibit a damping function while the pantograph material 21 is contracted and expanded in response to the fluctuations in both clearances S.

As mentioned above, although embodiment of the damping structure of the elevator shaft by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the first and second embodiments, the mounting positions of the vibration control devices 10 and 20 are corner portions (damper mounting portions 1A to 1D) in a plan view of the elevator shaft 1, and the vertical position is also the elevator. The position is lowered by 2/3 from the fixed end 1a of the shaft 1. However, the position is not limited to such an installation position and quantity. For example, it is not a corner portion of the elevator shaft 1 but in a plan view. It may be arranged in the middle of the four sides of the rectangle. In short, it is only necessary to be provided between the side surface 1d of the elevator shaft 1 and the lower-layer housing 2A.
The configuration and specifications such as the length and diameter of the oil damper can be arbitrarily set according to conditions such as the size of the clearance S.

It is a longitudinal section showing a schematic structure of an elevator shaft installed in a building according to the first embodiment of the present invention. It is an AA arrow directional view shown in FIG. It is a figure which shows the structure of an oil damper. It is a longitudinal cross-sectional view for demonstrating the effect | action of the elevator shaft at the time of an earthquake, Comprising: It is a figure corresponding to FIG. It is a BB arrow directional view shown in FIG. It is a longitudinal cross-sectional view which shows schematic structure of the elevator shaft installed in the building by 2nd Embodiment. It is CC line arrow directional view shown in FIG. It is a longitudinal cross-sectional view for demonstrating the effect | action of the elevator shaft at the time of an earthquake, Comprising: It is a figure corresponding to FIG. It is a DD line arrow line view shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elevator shaft 1d Side surface 2 Building 2A Housing 4, 4A, 4B Elevator 6 Beam material 7 Slide floor 10, 20 Damping damper 11, 22 Oil damper 21 Pantograph material M Seismic isolation layer P Damping direction R Shaft passage S Clearance

Claims (3)

In a building with a seismic isolation layer on an intermediate floor, the elevator shaft is controlled by an elevator shaft that is suspended from the beam material above the seismic isolation layer. And
A damping damper is provided between the side surface of the elevator shaft and the lower-level frame of the seismic isolation layer,
The damping damper is composed of an oil damper, and the damping direction of the oil damper is disposed in an inclined posture with respect to the side surface of the elevator shaft, and is rotatably attached to the elevator shaft and the housing. The characteristic damping structure of the elevator shaft. In a building with a seismic isolation layer on an intermediate floor, the elevator shaft is controlled by an elevator shaft that is suspended from the beam material above the seismic isolation layer. And
A damping damper is provided between a side surface of the elevator shaft and a lower-level frame of the seismic isolation layer,
The seismic damper includes a rhombus-shaped pantograph material, and an oil damper provided between a pair of connecting portions opposed to the pantograph material,
An elevator characterized in that the oil damper is disposed with its damping direction directed up and down, and another pair of opposing connecting portions of the pantograph material are rotatably attached to the elevator shaft and the housing. Shaft damping structure.   The said damping damper is attached to the position which fell only 2/3 length from the fixed end fixed to the said beam material in the length direction of the said elevator shaft. The damping structure of the elevator shaft described in 1.

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