JP2006083662A - Unit for installation of base-isolation device, fitting method of the same and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a unit for installation of a base-isolation device for simplifying the manufacturing process and reducing the cost by minimizing the work for drilling a through-hole for bolt insertion and the work for connecting nut members, which are needed conventionally, while a number of nut members are connected annularly at predetermined positions by using a metal plate, a fitting method of the unit and its manufacturing method. <P>SOLUTION: The unit for installation of the base-isolation device comprises a number of nut members 1 screwed to the bolts 12 for fixing the base-isolation device, and a metal plate 3 arranged on an upper surface of a concrete foundation pedestal 2 for connecting the nut members 1 annularly in plane view. In the unit and its fitting method, the metal plate 3 comprises a plurality of metal plate pieces 3a divided in an annular direction. In the unit and its manufacturing method, the foundation pedestal is made of a precast concrete. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a plurality of nut members that are screwed into bolts for fixing a seismic isolation device, and a metal plate that is arranged on the upper surface of a concrete base by connecting the numerous nut members in a ring shape in a plan view. Provided, and the plurality of nut members are used by being embedded in the base table in a state in which the female screw portions are opened on the upper surface of the base table through through holes formed in the metal plate. The present invention relates to a unit for installing a seismic device and a method for attaching and manufacturing the unit.

Such a unit for installing a seismic isolation device is, for example, used for fixing by fixing a large number of nut members on a concrete base that is installed on the foundation of a building and placing the seismic isolation device on the upper surface of the base. Conventionally, it is widely known that the metal plate arranged on the upper surface of the concrete base plate by connecting the nut members in an annular shape is constituted by a single metal plate. (For example, see Patent Documents 1 to 4).
In addition, the metal plate that connects the nut members in an annular shape is composed of one metal plate, the concrete base is made of precast concrete, and one metal plate is arranged on the upper surface of the precast concrete base, There is also known a configuration in which a large number of nut members are embedded in a base and are manufactured in advance in a factory or the like (for example, see Patent Document 5).

Japanese Patent No. 3261005 Japanese Patent Laid-Open No. 10-246028 Japanese Patent Laid-Open No. 11-50694 JP 2000-257302 A JP 2002-97818 A

In the prior art described in these patent documents, in any case, the metal plate for connecting the nut members in an annular shape is constituted by a single metal plate, and a large number of nut members are connected to the lower surface side thereof. Depending on the seismic isolation device to be used, it is necessary to prepare a metal plate each time, and to drill a through hole for inserting a bolt into the metal plate or to connect a nut member. This was one of the causes of the cost increase of the seismic device installation unit and the unit installation work.
In other words, there are many types of seismic isolation devices, and the number and arrangement of bolt insertion holes are different for each seismic isolation device, so prepare a metal plate of an appropriate size according to the seismic isolation device to be used, And it is necessary to drill through holes for inserting bolts or connect nut members to the metal plates, and even in the same building, different seismic isolation devices may be used depending on the installation location, In such a case, several kinds of metal plates have to be produced, and there is room for improvement in this respect.

  The present invention pays attention to such a conventional problem, and the object thereof is conventionally required even though a large number of nut members can be annularly connected to predetermined positions using a metal plate. A seismic isolation device installation unit that can simplify the manufacturing process and reduce costs by minimizing the drilling operation of the bolt insertion through hole and the connecting operation of the nut member as much as possible. On offer.

  A first characteristic configuration of the present invention includes a large number of nut members screwed into bolts for fixing a seismic isolation device, and the large number of nut members connected in an annular shape in a plan view on an upper surface of a concrete base. A plurality of nut members embedded in the base plate in a state where each female screw portion is opened on the upper surface of the base plate through a through-hole drilled in the metal plate. The seismic isolation device installation unit is used, wherein the metal plate is constituted by a plurality of metal plate pieces divided in the annular direction, and a plurality of nut members are provided for each metal plate piece. It is connected.

According to the first characteristic configuration of the present invention, the metal plate for connecting a large number of nut members screwed to the bolts for fixing the seismic isolation device in an annular shape in a plan view is divided into a plurality of pieces in the annular direction. Since a plurality of nut members are connected to each metal plate piece, it is configured to some extent by appropriately setting the arrangement relation of each metal plate piece according to the seismic isolation device to be used. It can cope with different seismic isolation devices.
Therefore, it is possible to mass-produce such a seismic isolation device installation unit in advance, and in some cases, mass-produce 2 to 3 types of units different in size in advance, and to support the seismic isolation device to be used, The manufacturing process can be simplified and the seismic isolation device installation unit can be provided at a relatively low cost.

  The second characteristic configuration of the present invention includes a large number of nut members screwed into bolts for fixing the seismic isolation device, and the large number of nut members connected in an annular shape in plan view on the upper surface of the concrete base. A plurality of nut members embedded in the base plate in a state where each female screw portion is opened on the upper surface of the base plate through a through-hole drilled in the metal plate. A seismic isolation device installation unit used, wherein the foundation is made of precast concrete, and the metal plate is composed of a plurality of metal plate pieces divided in the annular direction. A plurality of nut members are connected to the plate piece.

According to the second characteristic configuration of the present invention, the metal plate that connects a large number of nut members that are screwed to the bolts for fixing the seismic isolation device in an annular shape in plan view is divided into a plurality of pieces in the annular direction. Since it is constituted by a plate piece and a plurality of nut members are connected to each metal plate piece, as described above, the seismic isolation device installation unit is mass-produced in advance and used. Accordingly, the arrangement relation of the metal plate pieces can be appropriately set and used, and the seismic isolation device installation unit can be provided relatively inexpensively.
And, the concrete base that embeds the many nut members is made of precast concrete, and since a large number of nut members are embedded in the base in advance, at the work site where the seismic isolation device is attached, There is no need to cast concrete to prepare a foundation, and the seismic isolation device can be easily attached in a relatively short time.

  According to a third characteristic configuration of the present invention, in the above-described seismic isolation device installation unit, each of the metal plate pieces has a substantially rectangular shape, and a plurality of nut members are substantially disposed along the long side of the rectangle. They are in a straight line and connected.

  According to the third characteristic configuration of the present invention, each metal plate piece has a substantially rectangular shape, and a plurality of nut members are arranged in a straight line and connected along the long side of the rectangle. Therefore, for example, it is easy to produce compared to an arc-shaped metal plate piece, and is highly versatile.

  According to a fourth characteristic configuration of the present invention, in the above-described seismic isolation device installation unit, each of the rectangular metal plate pieces is disposed with its long sides along the X axis and the Y axis that are substantially orthogonal to each other. By the way.

According to the fourth characteristic configuration of the present invention, the rectangular metal plate pieces are disposed along the long sides of the X axis and the Y axis which are substantially orthogonal to each other. Even in the case of manufacturing in advance in a factory or the like, it is easy to avoid interference between the reinforcing bar embedded in the concrete and the nut member.
That is, the reinforcing bars are usually arranged in directions substantially perpendicular to each other, and by arranging the rectangular metal plate pieces along the X axis and the Y axis with the reinforcing bar arrangement directions as the X axis and the Y axis, Since it is suppressed that the nut member connected with each metal plate piece interferes with a reinforcing bar, arrangement | positioning of a nut member becomes easy.

  A fifth characteristic configuration of the present invention is a method of attaching the seismic isolation device installation unit according to the first characteristic configuration described above to the foundation of a building, and is provided in an internal thread portion that opens to each of the plurality of divided metal plate pieces. Using a positioning restriction jig that is provided with positioning protrusions that can be respectively inserted into the metal plate pieces and restricts the relative arrangement relationship between the metal plate pieces. In addition, the positioning protrusions of the arrangement restricting jig are inserted into the female screw portions of the metal plate pieces from above the unit to regulate the arrangement relationship between the metal plate pieces. It is in the place where concrete is placed in between.

  According to the fifth characteristic configuration of the present invention, the positioning protrusions that can be inserted into the female screw portions that open to the plurality of divided metal plate pieces are provided, and the relative positional relationship between the metal plate pieces is regulated. Place the metal plate pieces of the unit on the foundation of the building by using the placement restriction jig, and place the positioning protrusions of the placement restriction jig from the upper part of the unit in the female thread of each metal plate piece. In a state in which the arrangement relation between the metal plate pieces is regulated by inserting into the concrete and placing the concrete between the unit and the foundation, the metal plate for connecting a number of nut members, as described above, In spite of being constituted by a plurality of divided metal plate pieces, it is possible to attach the seismic isolation device installation unit while reliably holding the relative arrangement between the metal plate pieces in a desired arrangement relationship.

  A sixth characteristic configuration of the present invention is a method for manufacturing a unit for installing a seismic isolation device according to the second characteristic configuration described above, and can be inserted into a female screw portion opened in each of the plurality of divided metal plate pieces. A lower mold frame that includes a positioning protrusion and restricts the relative positional relationship between the metal plate pieces, and the female plate portion of each metal plate piece is placed on the lower mold frame with the metal plate pieces of the unit facing downward. In the state where the positioning projection between the metal plate pieces and the positioning relationship between the metal plate pieces are regulated, concrete is placed between the unit and the lower mold frame, and the foundation is manufactured and manufactured. is there.

  According to the sixth characteristic configuration of the present invention, the positioning protrusions that can be inserted into the female screw portions that open to the plurality of divided metal plate pieces are provided, and the relative positional relationship between the metal plate pieces is regulated. Using the lower mold, with the metal plate pieces of the unit facing downward, the female screw part of each metal plate piece is externally fitted to the positioning projection of the lower mold frame, and the arrangement relationship between the metal plate pieces is regulated Since the base plate is produced by placing concrete between the unit and the lower mold, the metal plate for connecting a number of nut members is divided into a plurality of pieces as described above. In spite of being constituted by the above, it is possible to manufacture a seismic isolation device installation unit having a pre-cast concrete foundation base while reliably holding the relative arrangement between the metal plate pieces in a desired arrangement relationship. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a seismic isolation device installation unit according to the present invention, a method for attaching the unit and a method for manufacturing the unit will be described with reference to the drawings.
In the first embodiment, as shown in FIG. 2 and FIG. 3, the seismic isolation device installation unit includes a number of nut members 1 screwed into bolts for fixing the seismic isolation device, and the number of nuts. The member 1 is provided with a metal plate 3 that is connected in a square ring shape in plan view and disposed on the upper surface of the concrete base 2, and the metal plate 3 includes a plurality of nut members 1 in the ring direction in plan view. In this embodiment, the metal plate piece 3a is divided into four metal plate pieces 3a.
The nut member 1 is composed of a metal cap nut whose female screw portion 4 is opened only in one end direction, and a plurality of nut members 1 are provided on the back surface of each metal plate piece 3a with the opening side of the female screw portion 4 facing upward. Then, three are connected and fixed, and the female thread portion 4 of each nut member 1 is opened on the upper surface of the metal plate 3a through a through hole 3b for inserting a bolt formed in the metal plate piece 3a.

Each metal plate piece 3a is formed, for example, by cutting a commercially available flat bar into an appropriate length, and thus has a substantially rectangular shape, along the long side of the rectangle, and in the width direction. The three nut members 1 are arranged and connected so as to be substantially in a straight line.
A female screw portion 5 different from the female screw portion 4 of the cap nut is provided on the bottom portion of the cap nut constituting the nut member 1 substantially concentrically with the female screw portion 4 of the cap nut. The headed bolt 6 is configured to be screwed with its head 6a facing down.

Next, an attachment method for attaching the seismic isolation device installation unit according to the first embodiment to the foundation of the building will be described.
When placing the foundation of the building, as shown in Fig. 4, rebar 7 is placed in the location where the seismic isolation device is installed so as to protrude upward from foundation B, and the seismic isolation device is installed at the installation location. After placing the unit for use, the relative arrangement between the metal plate pieces 3a is positioned.
For the positioning of the metal plate piece 3a, for example, as shown in FIG. 5, a substantially square annular plate 8 and a large number of positioning projections 9 projecting from the plate 8, 8 in this embodiment are provided. An arrangement restricting jig 10 having a positioning projection 9 is used.

Two positioning protrusions 9 of the arrangement restricting jig 10 are provided on each side of the square plate body 8, and the two protrusions 9 on each side are connected to each metal plate piece 3a. Among the nut members 1, the nut members 1 are provided at positions corresponding to the nut members 1 located at both ends, and in the corresponding state, a total of 12 nut members 1 correspond to the bolt insertion holes of the seismic isolation device to be used. Is set to
Therefore, as shown in FIG. 6, each metal plate piece 3a of the seismic isolation device installation unit is positioned upward, and, for example, one or two headed bolts among the headed bolts 6 in each metal plate piece 3a. 6 is loosened so that its head 6a protrudes downward so that it abuts against the upper surface of the foundation B of the building, and the height of each metal plate piece 3a is adjusted to a predetermined height, while the arrangement is restricted from above the unit. By inserting the positioning protrusions 9 of the jig 10 into the female screw portion 4 of the nut member 1, each nut member 1 is positioned so as to correspond to the bolt insertion hole of the seismic isolation device.

In the state of positioning in this way, as shown in FIG. 2, the two metal plate pieces 3a facing each other are arranged so that their long sides are parallel along the X axis, and the other two sheets The metal plate pieces 3a are arranged so as to be parallel along the Y axis substantially orthogonal to the X axis. As a result, a total of twelve nut members 1 and headed bolts 6 are substantially perpendicular to the X axis and the Y axis. Arranged along the axis.
After that, the reinforcing bars 7 are arranged. By arranging the reinforcing bars 7 along the X axis and the Y axis, the interference between the reinforcing bars 7 and the nut member 1 and the headed bolt 6 is avoided. Reinforcing bars 7 can be easily arranged. Further, as shown in FIG. 7, a concrete is placed so as to be substantially flush with the upper surface of each metal plate piece 3a. The base plate 2 is prepared and attached.
After the concrete of the base 2 is solidified, as shown in FIG. 1, the base isolation device 11 is placed on the base 2 and the base isolation device is fixed to the bolt insertion hole of the lower mounting plate 11 a of the base isolation device 11. The bolt 12 is inserted into the female screw portion 4 of each nut member 1 opened on the upper surface of the base 2, and the non-shrink mortar M is mounted between the mounting plate 11 a and the base 2. The bolt 12 is tightened and the seismic isolation device 11 is installed on the base 2.

In the second embodiment, as shown in FIG. 10, the seismic isolation device installation unit includes a number of nut members 1 screwed into bolts for fixing the seismic isolation device, and the number of nut members 1. It is comprised by the base plate 13 made from the precast concrete which embeds the metal plate 3 connected cyclically | annularly in planar view, and many nut members 1 are embedded.
And the metal plate 3 which connects the nut member 1 is the metal divided | segmented into plurality in the annular direction of many nut members 1 in planar view like FIG. 8, for example like 1st Embodiment. The plate piece 3a, which is also constituted by four metal plate pieces 3a in this embodiment, is arranged on the upper surface of the precast concrete base 13.

Similarly to the first embodiment, the nut member 1 is also composed of a metal cap nut, and three nut members 1 are connected and fixed to the back surface of each metal plate piece 3a with the opening side of the female screw portion 4 facing upward. The female screw portion 4 of the member 1 is opened on the upper surface of the metal plate 3a through a through hole 3b for inserting a bolt formed in the metal plate piece 3a, and the bottom portion of the cap nut is connected to the female screw portion 4 of the cap nut. A headed bolt 6 is configured to be screwed into a female screw part 5 provided substantially concentrically with its head 6a facing down.
Each metal plate piece 3a is also formed in the same manner as in the first embodiment, for example, by cutting a commercially available flat bar into an appropriate length, along the long side of the rectangle, and in the width direction. The three nut members 1 are arranged and connected so as to be substantially in a straight line in a state where the nut members 1 are located substantially in the center.

Next, a method for manufacturing the seismic isolation device installation unit according to the second embodiment will be described.
To manufacture this seismic isolation device installation unit, as shown in FIGS. 8 and 9, for example, a lower mold 15 having a total of eight positioning protrusions 14 is used.
Two positioning projections 14 of the lower mold 15 are provided on each side so as to form a square ring shape, and two projections 14 on each side are connected to each metal plate piece 3a. Among the nut members 1, the nut members 1 are provided at positions corresponding to the nut members 1 located at both ends, and in the corresponding state, a total of 12 nut members 1 correspond to the bolt insertion holes of the seismic isolation device to be used. Is set to

Accordingly, each metal plate piece 3a is turned downward from above the lower mold 15 so that the female screw portion 4 of the nut member 1 is opened downward. The nut member 1 is positioned so as to correspond to the bolt insertion hole of the seismic isolation device by externally fitting the portion 4 to the positioning projection 14. In this state, the nut member 1 is shown in FIG. As described with reference to FIG. 2, the two metal plate pieces 3a facing each other are arranged so that their long sides are parallel along the X axis, and the other two metal plate pieces 3a are As a result, the 12 nut members 1 and the head bolts 6 are arranged along the X axis and the Y axis substantially orthogonal to each other. The

Thereafter, as shown in FIG. 9, the reinforcing bar 7 is arranged above the lower mold 15. By arranging the reinforcing bar 7 along the X axis and the Y axis, the reinforcing bar 7 and the nut member are arranged. It is possible to easily arrange the reinforcing bars 7 by avoiding interference with the bolts 1 and the headed bolts 6, and further, by forming a necessary formwork on the lower formwork 15, Concrete is placed so as to be substantially flush with each other, and a base 13 made of precast concrete is produced to manufacture a unit for installing a seismic isolation device.
In the seismic isolation device installation unit thus manufactured, the nut member 1 is embedded in the precast concrete base 13, and the internal thread portion 4 of each nut member 1 is disposed on the upper surface of the base 13. The plate piece 3a is open and the headed bolt 6 projects from the lower surface of the base 13 with the head 6a facing down.

In order to attach the seismic isolation device installation unit according to the second embodiment to the foundation of the building, as shown in FIG. 11, the reinforcing bars 16 are arranged above the foundation B, and the seismic isolation device installation unit is mounted. Put. At that time, for example, four of the headed bolts 6 are loosened, and the heads 6a are protruded downward so that the heads 6a abut against the upper surface of the foundation B. The amount of protrusion of the attached bolt 6 is adjusted, and the height of the upper surface of the base 13 is adjusted to a predetermined height.
Next, a formwork is assembled, concrete is placed between the foundation B and the foundation platform 13, and after the concrete is solidified, the non-shrink mortar M is filled between the concrete and the foundation platform 13. The seismic isolation device 11 is placed on the top. And the bolt 12 for seismic isolation device fixation is inserted in the bolt insertion hole of the mounting plate 11a of the seismic isolation device 11, and the bolt 12 is inserted into the female thread portion 4 of each nut member 1 opened on the upper surface of the base 13. The seismic isolation device 11 is installed on the precast base 13 by screwing and tightening.

[Another embodiment]
(1) Although the example which formed the metal plate piece 3a in the rectangle was shown in previous embodiment, the shape of the metal plate piece 3a is not restricted to a rectangle, For example, it can also form in circular arc shape etc.
Moreover, although the example which connected the three nut members 1 to the metal plate piece 3a was shown, the number of the nut members 1 connected to the metal plate piece 3a is arbitrary, Furthermore, the nut member 1 is not necessarily a bag. It need not be a nut.

(2) In the previous embodiment, the example in which the four metal plate pieces 3a are provided in the seismic isolation device installation unit is shown. However, the number of metal plate pieces 3a provided in the seismic isolation device installation unit is used. It can be set arbitrarily depending on the size of the seismic isolation device, etc., and the positioning protrusion 9 of the arrangement restricting jig 10 depends on the number of the metal plate pieces 3a and the number of nut members 1 connected to the metal plate pieces 3a. And the number of positioning projections 14 of the lower mold 15 are also set as appropriate.

Partially cutaway front view showing a state in which the seismic isolation device is attached using the seismic isolation device installation unit according to the first embodiment The top view of the unit for seismic isolation apparatus installation by 1st Embodiment Partially cutaway front view of the seismic isolation device installation unit according to the first embodiment The front view which shows the attachment state of the unit for seismic isolation apparatus installation by 1st Embodiment The perspective view which shows the attachment state of the unit for seismic isolation apparatus installation by 1st Embodiment Partially cutaway front view showing a mounting state of the seismic isolation device installation unit according to the first embodiment The front view which shows the attachment state of the unit for seismic isolation apparatus installation by 1st Embodiment The perspective view which shows the manufacturing process of the unit for seismic isolation apparatus installation by 2nd Embodiment. The front view which shows the manufacturing process of the unit for seismic isolation apparatus installation by 2nd Embodiment Front view of the seismic isolation device installation unit according to the second embodiment Partially cutaway front view showing a state in which the seismic isolation device is attached using the seismic isolation device installation unit according to the second embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nut member 2 Concrete base 3 Metal plate 3a Metal plate piece which comprises a metal plate 3b Through-hole drilled in a metal plate piece 4 Female thread part of a nut member 9 Positioning protrusion of an arrangement restricting jig 10 Arrangement restricting jig 11 Seismic Isolation Device 12 Seismic Isolation Device Fixing Bolt 13 Precast Concrete Base 14 Protrusion for Lower Forming Position 15 Lower Formwork B Foundation

Claims (6)

A plurality of nut members that are screwed into bolts for fixing the seismic isolation device, and a metal plate that is arranged on the upper surface of the concrete base by connecting the numerous nut members in a ring shape in a plan view. For installation of a seismic isolation device, each nut member is embedded and used in the base table in a state in which each female screw portion is opened on the upper surface of the base table through a through hole formed in the metal plate. A unit,
The seismic isolation device installation unit, wherein the metal plate is constituted by a plurality of metal plate pieces divided in the annular direction, and a plurality of nut members are connected to each metal plate piece. A plurality of nut members that are screwed into bolts for fixing the seismic isolation device, and a metal plate that is arranged on the upper surface of the concrete base by connecting the numerous nut members in a ring shape in a plan view. For installation of a seismic isolation device, each nut member is embedded and used in the base table in a state in which each female screw portion is opened on the upper surface of the base table through a through hole formed in the metal plate. A unit,
The foundation is made of precast concrete, the metal plate is constituted by a plurality of metal plate pieces divided in the annular direction, and a plurality of nut members are connected to each metal plate piece. Unit for installing seismic isolation devices.   3. The seismic isolation device according to claim 1, wherein each of the metal plate pieces has a substantially rectangular shape, and a plurality of nut members are arranged in a substantially straight line along the long side of the rectangle. Installation unit.   The seismic isolation device installation unit according to claim 3, wherein each of the rectangular metal plate pieces is disposed along the X axis and the Y axis substantially orthogonal to each other along the long side thereof.   A method of attaching the seismic isolation device installation unit according to claim 1 to the foundation of a building, wherein each of the plurality of seismic isolation device installation units includes positioning protrusions that can be inserted into female screw portions that open to the metal plate pieces. Using a placement restriction jig that restricts the relative placement relationship between the metal plate pieces, each metal plate piece of the unit is positioned above and placed on the foundation of the building, and the placement restriction from above the unit. Seismic isolation device in which concrete is placed between the unit and the foundation in a state in which the positioning protrusions of the jig are inserted into the female threaded portions of the metal plate pieces and the positional relationship between the metal plate pieces is regulated. How to install the installation unit.   3. The method for manufacturing a seismic isolation device installing unit according to claim 2, wherein each of the metal plate pieces includes a positioning projection that can be inserted into a female screw portion that opens in each of the plurality of divided metal plate pieces. The lower mold is used to regulate the relative positional relationship between the metal plates, and the metal plate pieces of the unit are faced down so that the female screw portions of the metal plate pieces are externally fitted to the positioning projections of the lower mold frame. A method for manufacturing a unit for installing a seismic isolation device, wherein concrete is placed between the unit and a lower mold frame to manufacture and manufacture the foundation table in a state where the arrangement relationship between the pieces is regulated.

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