JP3328772B2 - Wind sway prevention structure for seismically isolated houses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-sway device for seismically isolated houses, which is used to prevent the seismic isolated houses from shaking when strong wind acts on the houses.

[0002]

2. Description of the Related Art As is well known, as a conventional seismic isolation device for protecting a building from vibrations caused by an earthquake, (1) a device which supports a building from below with a laminated rubber in which rubber and iron plates are alternately stacked (2) ) A device that absorbs vibration caused by an earthquake with a damper device (3) A device that insulates the ground or foundation from the above-mentioned building is proposed. Insulating the ground or foundation and the building in (3) above, the building or floating the building with liquid or magnetism, sliding the ground or foundation and the building (slip bearing), Alternatively, various types have been proposed in which a sphere such as a roll bearing rolls between the ground or the like and a building. These seismic isolation devices may be used together with, for example, the seismic isolation device having the laminated rubber as a component and a seismic isolation device called a sliding bearing, in addition to the case where each is used alone.

[0003]

The research and development of such seismic isolation devices or seismic isolation structures have been rapidly promoted by major construction companies in recent years, and some of them have been put into practical use. Most of them are applied to heavy objects such as buildings, and few consider the seismic isolation of detached houses. In consideration of the seismic isolation device applied to such a detached house, it is conceivable to use the above-mentioned (1) seismic isolation device having a laminated rubber as a constituent element. Because of the light weight of such structures, it is not possible to obtain excellent seismic isolation characteristics.On the other hand, it is expensive at present and the use of all seismic isolation devices increases the total housing cost and is practically difficult. is there. Therefore, in addition to expecting excellent seismic isolation characteristics and considering the overall cost, the seismic isolation device having the laminated rubber as a component of the above (1) is added to the seismic isolation device referred to as the sliding bearing or the upper and lower At present, it is desirable to use it in combination with a seismic isolation device or the like in which a sphere is interposed between the bearing plates.

[0004] However, whether the above-mentioned various seismic isolation devices are used alone or in combination, the building supported by the seismic isolation device is, in the case of a detached house, a high-rise building or the like. Because it is extremely lightweight compared to
When a strong wind such as a typhoon acts on a detached house, the wind pressure often causes the entire building to sway in the leeward and leeward directions, though slowly. In particular, when the detached house has a high height from the ground such as a three-story house, the wind sway is strong.

Therefore, conventionally, in order to prevent wind sway of such seismically isolated houses, for example, Japanese Patent Publication No. 6-35763.
The structure disclosed in Japanese Patent Application Laid-Open Publication No. H11-260, and the structure shown in FIG. 4 have been proposed. This structure is based on an H-shaped rope 50 fixed to the ground side.
And the steel base 51 constituting the building are connected to the wind sway prevention pin 5.
2 and 52 propose a structure for interconnecting.
The H-shaped rope 50 includes a lower plate portion 50a fixed to the ground,
Upright portion 50b rising from the center of lower plate portion 50a
And an upper plate portion 50c whose center is fixed to the upper end of the upright portion 50d. The upper plate portion 50c is provided with first through holes 50d, 50d slightly separated from each other. . The lower surface of the steel frame base 51 is opposed to the upper plate portion 50c of the H-shaped rope 50, and the steel frame base 51 has a second through hole 51a. The wind sway prevention pin 52 includes a shaft portion 52a and a head portion 52b, and the shaft portions 52a, 52a are inserted into the first through hole 50d from the second through hole 51a side. It is.

However, in such a structure, first,
If the building moves before the wind sway prevention pins 52, 52 are inserted, the positions of the first through-hole 50d and the second through-hole 51a are shifted, so that the insertion may not be possible after all. Many. Also, in consideration of quick construction on site, the H-type rope 50 and the steel base 51 are provided with first through holes 50d, 50d in advance in the H-type rope 50,
It is desirable to form a second through hole 51a in the steel base 51, but it is difficult to accurately position the H-type rope 50 fixed to the ground side. Are often shifted from each other. Also, these wind sway prevention pins 52, 52
Is to prevent wind sway and at the same time to eliminate the seismic isolation effect of the seismic isolation device, so it is necessary to remove it when the typhoon or the like has subsided. However, in many cases, the building and the ground do not return to their original positions with high accuracy, and the wind sway preventing pins 52, 52 are subjected to shearing force and cannot easily come off. Further, the wind sway prevention pin 5
Since the arrangement positions of the wind sway prevention pins 52 and 52 are extremely low, the operability of inserting and pulling out the wind sway prevention pins 52 and 52 is extremely poor.
The possibility of losing 2 cannot be denied.

Therefore, the present invention has been proposed to solve the various problems of the above-mentioned conventional wind sway prevention structure for a base-isolated house, and the operation for preventing the wind sway is extremely simple. It is another object of the present invention to provide an anti-swaying structure for seismically isolated houses, which can realize a quick construction work because high positioning is not required.

[0008]

Means for Solving the Problems The present invention has been proposed to solve the above problems, and the first invention (the invention according to claim 1) is seismically isolated by a seismic isolation device. the lower surface of the base constituting the seismic isolation structure, a plurality of jacks is fixed, the tip of the elastic members constituting these jacks is made to be pressed against the ground <br/> board, these jacks
Is fixed to the lower surface of the base, and each jack has an upper
An operation unit that expands and contracts the telescopic member with the operation handle
It is to characterized in that it comprises.

The seismic isolation device of the first aspect of the present invention includes a seismic isolation device having the above-described laminated rubber as a component, a seismic isolation device for floating a building by liquid or magnetism, and a ground or foundation and a building. Or a seismic isolation device that rolls a sphere such as a roll bearing between the ground or the like and a building. Further, the jack may be a jack of a type that expands and contracts in a vertical direction, or a jack of a type that expands and contracts (elevates) an extendable rod.

According to the first aspect of the present invention, the distal end (lower end) of the elastic member is pressed against the ground by the expansion of the elastic member constituting the jack. Therefore, the distal end of the elastic member is not fixed to the ground due to the pressure contact of the elastic member. However, even when a force applied in the lateral direction, that is, a wind pressure at the time of strong wind acts, a large resistance acts.
Wind sway of seismically isolated houses can be effectively prevented. And, in the present invention, unlike the conventional structure, the wind sway preventing pin is not a constituent element, so that it is not necessary to form a through hole through which the pin is inserted, and the pin cannot be inserted. Alternatively, it is possible to effectively prevent a situation where the inserted pin does not come off. Moreover, according to the first aspect of the present invention, even when the seismic isolation device supporting the house is replaced or maintenance and inspection is performed, there is no need to prepare a separate jack, and the device is fixed as wind sway prevention. The jack described above can be used.

The second invention (the invention according to claim 2)
Is a ground, a structure provided above the ground, a seismic isolation device disposed between the ground and the structure for seismic isolation of the structure, and a base constituting the structure. A plurality of jacks fixed to the lower surface, and a space formed between the ground and the structure is closed by a shroud plate, and the shroud plate is provided inside the shroud plate. The distal end side of an operation handle for extending and retracting the elastic member constituting the jack is inserted or an insertion hole through which an operation unit to which the operation handle is connected is formed. is there.

The material of the shroud constituting the second invention is not particularly limited as long as the shroud closes at least the space between the ground and the structure.
The insertion hole formed in the enclosing plate has at least a length and width at which a distal end of an operation handle for expanding and contracting the elastic member constituting the jack is inserted or an operation portion to which the operation handle is connected is inserted. However, if the jack used is of a type in which the position of the operation handle is shifted in the vertical direction (extension and contraction direction), the insertion hole is allowed to move. You need to be able to do it.

According to the second aspect of the invention, in addition to the functions and effects which can be realized by the first aspect of the invention, it is performed at the time of a strong wind such as a typhoon or immediately before or after the typhoon or the like has passed and the strong wind has subsided. The operation of the jack can be easily performed by anyone from outside the base-isolated house.

The third invention (the invention according to claim 3)
According to the second aspect of the present invention, in the second aspect, a confirmation window for confirming whether or not at least an elastic member constituting the jack is in contact with the ground is formed on the surrounding plate. It is.

According to the third aspect of the present invention, it is possible to easily check whether or not the distal end (lower end) of the elastic member constituting the jack projects from the ground by using the confirmation window. it can.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a wind sway prevention device for a seismically isolated house according to an embodiment of the present invention.

First, in the base-isolated house 1, a base-isolation device 4 is interposed between a ground 2 and a steel base 3 constituting a building (structure), and the building is supported by the base-isolation device 4. Is what it is. The seismic isolation device 4 includes a lower flange portion 4a fixed to a base 2a formed on the ground 2 side.
And an upper flange portion 4b fixed to the lower surface of the steel base 3, and a plurality of disc-shaped or ring-shaped laminated rubber 4c laminated between the lower flange portion 4a and the upper flange portion 4b. This is a schematic configuration. That is, this building is provided with a large number of seismic isolation devices 4 having the above-described configuration, and is protected from earthquake vibration by these seismic isolation devices 4.

In this embodiment, at least two or more jacks 6 constituting the present invention (each corner of building and / or
Or between each corner). The jack 6 includes a drive section 6a covered by an arc-shaped housing (reference numerals are omitted), a cylinder section 6b hanging downward from the drive section 6a, and a cylinder section 6b. It has a telescopic rod 6c that is housed and expands / contracts (elevates) when driven by the driving unit 6a. The driving unit 6a has an operating unit 6d that is rotated and protrudes to the outside from an opening formed in the housing, and the distal end (lower end) of the telescopic rod 6c touches the ground 2. The contact plate 6e that is in contact is fixed.

That is, in this seismic isolation housing wind sway prevention structure, the operating portion 6d of the jack 6 is rotated clockwise by an operating handle 7 (see FIG. 3) described later to thereby expand and contract the jack 6. The contact plate 6e fixed to the tip of the rod 6c is gradually extended downward, and is eventually brought into contact with the ground 2 as shown in FIG. The lower surface of the contact plate 6e is firmly pressed against the ground 2. In other words, these jacks 6 support the load of almost the entire building. When the strong wind stops, the operation section 6d is again inverted via the operation handle 7 to reduce (up) the telescopic rod 6c, and the ground 2 and the telescopic rod 6c are turned off.
What is necessary is just to separate the contact plate 6e fixed to c.

Therefore, even if a strong wind such as a typhoon acts on the building, a large load acts between the contact plate 6e constituting each jack 6 and the ground 2 due to a large load. Even when acting on the seismic isolated house, it is possible to effectively prevent the seismic isolated house from shaking. In particular, according to the seismically isolated house wind sway prevention structure having such a configuration, since the conventional wind sway prevention pin is not used, the fixing position of the jack 6 is not particularly limited, and the jack 6 is not affected by strong wind. The wind sway can be prevented even after the sway, and the release can be performed very easily. Further, by adopting such a structure, even when the seismic isolation device 4 is replaced or maintenance and inspection are performed, the use of the jack 6 allows the entire seismic isolated house to be raised and supported. Does not require a separate jack.

FIG. 3 shows the above-described seismically isolated house with a shroud plate 10 constituting the present invention (the invention according to claims 2 and 3).
Indicates a fixed state.
Is fixed to the building side together with the outer wall 11 fixed to the seismic isolation house. The steel base 3 and the ground 2
It is to cover between. The surrounding plate 10 is a metal plate,
It is formed into a thin plate from any material such as a wooden plate or a resin plate. The operation plate 6d constituting the jack 6 is inserted through the surrounding plate 10 to form an insertion hole 10a facing the outside. Therefore, the worker locks the operation portion 6d exposed from the insertion hole 10a to the locking portion 7a formed at the tip of the operation handle 7 from outside the base-isolated house, and rotates the operation portion. The telescopic rod 6c can be expanded and contracted (or raised and lowered).

Further, the above-mentioned insertion hole 1 is
A confirmation window 10b is opened below 0a. The confirmation window 10b is formed at a position where it can be confirmed from the outside of the base-isolated house whether or not the contact plate 6e constituting the jack 6 and the ground 2 are in contact. Therefore, the confirmation window 10a is not limited to a rectangular one as shown in FIG.

As described above, according to the seismically isolated house wind sway prevention structure according to the above-described embodiment, even when a strong wind or the like simply acts, the wind sway can be prevented. Unlike the conventional structure, the wind sway prevention pin is not a constituent element. Therefore, it is not necessary to form a through hole through which the pin is inserted, and the pin cannot be inserted, or the inserted pin may not be inserted. It is possible to effectively prevent a situation such as not falling out. In addition, according to this structure, even when the seismic isolation device supporting the house is replaced or maintenance is performed, it is not necessary to provide a separate jack, and the jack fixed as wind sway prevention is used. Can be used. Further, since the operation unit 6d is exposed to the outside through the insertion window 10b, work required to prevent wind sway can be performed from outside the seismically isolated house. It is also possible to easily confirm whether or not the wind sway is currently being prevented via.

In the seismic isolation device for a seismic isolation house according to the above-described embodiment, the seismic isolation device 4 comprising the laminated rubber 4c is used as the seismic isolation device constituting the present invention. As described above, the present invention does not necessarily need to use such a seismic isolation device 4, and may use other conventionally used or proposed seismic isolation devices, or use these seismic isolation devices together. May be. Further, in the above-described embodiment, a jack having a fixed position of the operation unit 6d is illustrated and described as a jack constituting the present invention, but the jack constituting the present invention is not necessarily a jack having such a configuration. It is not necessary to use a jack, and a jack of a type that slightly moves up and down the operation unit by being expanded and contracted may be used. When such a jack is used, the above-described insertion hole 10a needs to have a slight width in the vertical direction. The confirmation window 10b may be closed by a glass plate or a transparent resin plate (not shown) in order to prevent dust from entering the floor of the base-isolated house from outside. Also, the operating portion 6d of the jack 6 may have a positional relationship such that the distal end side of the operating handle 7 is inserted without being exposed to the outside through the insertion hole 10a. Further, the current situation, that is, whether or not wind sway prevention measures are taken using the jack 6 is not only confirmed through the confirmation window 10b, but also by using a display plate or the like (not shown) to indicate the current state. May be made to be able to be confirmed.

[0025]

As is clear from the above description of the embodiment of the present invention, according to the present invention (the invention described in claim 1), the expansion and contraction member constituting the jack is extended.
The tip (lower end) of the elastic member is pressed against the ground. Therefore, although the distal end of the elastic member is not fixed to the ground due to the pressure contact of the elastic member, even if a force applied in the lateral direction, that is, a wind pressure at the time of strong wind acts, a large resistance acts. It is possible to effectively prevent the swaying of the quake house. And, in the present invention, unlike the conventional structure, the wind sway preventing pin is not a constituent element, so that it is not necessary to form a through hole through which the pin is inserted, and the pin cannot be inserted. Alternatively, it is possible to effectively prevent a situation where the inserted pin does not come off. Moreover, according to the first aspect of the present invention, it is not necessary to prepare a separate jack even when replacing the seismic isolation device supporting the house or performing maintenance and inspection, and the jack constituting the present invention is used. can do.

Further, the second invention (the invention according to claim 2)
In, the space formed between the ground and the structure,
While being closed by the surrounding plate, the front side of an operating handle for expanding and contracting the extensible member constituting the jack provided inside the surrounding plate is inserted into or connected to the surrounding plate. Since the insertion hole through which the operation unit to be inserted is formed is formed, the operation of the jack that is performed during a strong wind such as a typhoon or immediately before or after the typhoon etc. passes and the strong wind subsides Anyone can easily do from outside.

Further, the third invention (the invention according to claim 3)
In the shroud, since a confirmation window for confirming whether or not at least the elastic member constituting the jack is in contact with the ground, is formed by the confirmation window.
It can be easily confirmed by visually checking whether the tip (lower end) of the elastic member constituting the jack projects from the ground.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a main part of a wind sway prevention structure for a base-isolated house according to an embodiment of the present invention.

FIG. 2 is a front view showing a state where a telescopic rod constituting the jack shown in FIG. 1 is extended and abuts on the ground.

FIG. 3 is a perspective view schematically showing a main part in a state where a shroud is arranged in the seismically isolated house wind sway prevention structure shown in FIG.

FIG. 4 is a perspective view schematically showing a main part of a conventional wind sway prevention structure for a base-isolated house.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation house 2 Ground 3 Steel base 4 Seismic isolation device 6 Jack 6c Telescopic rod 7 Operation handle 10 Enclosure plate 10a Insertion hole 10b Confirmation window

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 9/02 331 E04H 9/14

Claims (3)

(57) [Claims] The lower surface of the 1. A base constituting the seismic isolation structure to be seismic isolation by isolator, a plurality of jacks is fixed, the tip of the elastic members constituting these jacks being capable pressed against the ground The upper ends of these jacks
It is fixed to the lower surface of the base, and each jack has the elastic part
There is no operation section that can expand and contract the material with the operation handle.
Seismic isolation residential-style swing prevention device, characterized in that that. 2. The ground, a structure provided above the ground, seismic isolation measures disposed between the ground and the structure for seismic isolation of the structure, and comprising the structure A plurality of jacks fixed to the lower surface of the base to be formed, and a space formed between the ground and the structure is closed by a shroud plate, and the shroud plate has It is characterized in that a distal end side of an operation handle for expanding and contracting the elastic member constituting the jack provided inside is inserted or an insertion hole through which an operation unit to which the operation handle is connected is formed. Anti-swaying structure for seismically isolated houses. The method according to claim 3, wherein the shroud of claim 2, wherein the stretch member constituting at least the jack becomes formed confirmation window for confirming whether or not in contact with the ground Wind sway prevention structure for seismically isolated houses.