JPH1162243A - Installing method for base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish a lightweight construction of a member to be used for the installation of a base isolation device while the installing strength is well maintained and improve the working effectiveness for the form preparing operation and concrete placing operation. SOLUTION: An upper and a lower backing plate are provided with inserting holes mating with fixing bolt inserting holes formed in flanges installed in the upper and lower parts of a base isolation device, and an anchor having a female threaded part capable of being engaged by a fixing bolt is provisionally attached using the backing plates and embedded in the specified position in the upper concrete and lower concrete. The contour of the lower backing plate 4 is made octagonal, and the lower concrete is placed from the gaps 16 formed at the angles of the form 15, while the contour of the upper backing plate is made square or rectangular, and the upper form is made along the contour of the backing plate, and then, upper concrete is placed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for installing a seismic isolation device used in a building. More specifically, the present invention relates to an improved technique for improving workability in installation work of a seismic isolation device.

[0002]

2. Description of the Related Art Conventionally, regarding installation of a seismic isolation device, fixing flanges are formed on the upper and lower surfaces of each seismic isolation device, and the seismic isolation device is fixed to the foundation concrete side and the skeleton side via the flange portions. As a result, a method of installing a seismic isolation device between the two has been implemented. The following method has been adopted as a method of installing a seismic isolation device on the foundation concrete side. That is, a base plate having substantially the same strength as the flange portion on the seismic isolation device side is used, and a large number of stud dowels or anchor materials are completely fixed to the lower surface thereof by permanent welding means such as stud welding. The base plate is completely fixed to a predetermined position via the stud dowel or anchor material by supporting the installation position of the seismic isolation device by forming a formwork for forming the foundation concrete and pouring concrete. The base concrete is formed in a state fixed to the base plate, and thereafter, the lower surface of the flange portion of the seismic isolation device is joined to the upper surface of the base plate, and the female screw or the lower surface of the base plate formed on the base plate itself using fixing bolts By screwing it to a welded cap nut and tightening the flange, the base Installation for the REIT side has been carried out. When the seismic isolation device is installed on the foundation concrete, the anchor material is temporarily supported in the fixing bolt insertion holes in the upper flange portion, or the base plate with the anchor material etc. is fixed on the same flange portion. Support, forming a formwork around it, casting the upper concrete, solidifying the concrete, and tightening and fixing the upper flange portion to the anchor material with fixing bolts. The installation for the side was performed.

[0003] In the above prior art, the base plate is attached to the base concrete side via a large number of stud dowels or anchor materials completely fixed to the lower surface of the base plate by permanent welding means such as stud welding. Technical means have been adopted in which the fixing is ensured and the seismic isolation device is installed through the fixing power of the base plate itself. For this reason, the base plate needs to have a large strength. In addition, since a large number of stud dowels and anchor materials are completely welded, it is necessary to use a large plate thickness in order to avoid deformation due to the heat effect accompanying the welding. For this reason, the conventional base plate is made of a steel plate having a plate thickness substantially equal to that of the fixing flange on the seismic isolation device side. Therefore, the erection frame for supporting the base plate also needs to have a strong structure, and the formation work also requires a large work load.

[0004] Conventionally, the upper and lower base plates are generally formed in the same shape consisting of a square or a circle. And when using the former base plate consisting of a pair of squares, it is better to form the lower formwork in the same square and cast concrete through the opening formed in the center of the lower auxiliary plate. It was a general conventional method. However, since reinforcing bars and the like are arranged in a considerably dense state inside the lower formwork, it is difficult to reliably fill concrete to each corner of the lower formwork with the conventional method. . For this reason, it is also practiced to form the mold into a longer rectangle and form gaps on both sides of the auxiliary plate, and to cast concrete from the gap. However, since the connection portion with the connection portion is considerably long, there is a problem that it is difficult to reliably fill concrete into every corner of the connection portion. In the case of using the latter base plate composed of a circular pair, a gap for concrete casting is formed at the corner of the mold due to the relationship between the lower circular base plate and the lower mold formed of a square. However, in terms of forming the upper mold, there is a problem that the shape of the contact portion with the mold is circular, so that the work of forming the mold is troublesome and the workability is extremely poor.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances of the prior art, and has been made to reduce the weight of members used for installation work while maintaining the strength of the installation of the seismic isolation device. The purpose of the present invention is to improve the workability of the formwork and concrete placing work as well as to improve the workability.

[0006]

According to the present invention, the fixing bolts can be inserted corresponding to the insertion holes of the fixing bolts formed in the respective flange portions provided on the upper and lower portions of the seismic isolation device. The upper and lower concrete plates are formed by using upper and lower attachment plates formed with various insertion holes, and supporting an anchor material having a female screw portion engageable with the fixing bolt in correspondence with each of the insertion holes of the attachment plates. The seismic isolation device is installed at a predetermined position by burying it at a predetermined position in the middle and tightening and fixing each of the flange portions to those anchor materials fixed in the upper and lower concrete via fixing bolts. Adopting the method of installing a seismic isolation device, further forming the outer shape of the lower attachment plate in an octagon, at least in the corners of the square formwork formed around the attachment plate A technique in which lower concrete is poured through a gap formed, and the outer shape of the upper auxiliary plate is formed in a square shape, and a formwork is formed in a state of being in contact with the outer peripheral edge thereof, and the upper concrete is poured. Means were adopted. As a more specific example, the lower mold is formed in an octagonal shape with every other 4 of the lower auxiliary plates.
A square is formed so as to be in contact with the side, and the lower concrete is poured through at least a gap formed at the corner of the formwork, and the upper formwork of the upper auxiliary plate formed into a square is formed. Technical means of forming a square along the outer periphery and casting the upper concrete was adopted.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, upper and lower flange portions provided in a seismic isolation device are fixed to lower concrete, that is, anchor material fixed in foundation concrete, or upper concrete, through fixing bolts. It can be widely applied as long as it is installed by fastening and fixing to an anchor material. It is sufficient that the thickness of the attachment plate is sufficient to perform the functions of positioning the anchor material and forming the installation surface of the seismic isolation device. Since it is not necessary to provide the function of transmitting the data to the board, the thickness of the sheet can be reduced by half. As described above, the outer shape of the lower attachment plate is formed in an octagon. The octagon in this case does not necessarily have to be a regular octagon in which each side is equal,
In particular, the side portion not in contact with the formwork may have some curvature. Further, the present invention is applicable to the case where the inner surface of the lower mold is formed so as to be in contact with the outer peripheral edge of the auxiliary plate, or when the lower mold is formed in a separated state. The lower concrete is cast at least through a gap between the lower plate and the auxiliary plate formed at the corner of the lower formwork. It is also possible to add casting. In any case, since concrete is cast from the corners of the lower formwork, a more reliable filling state can be easily obtained. On the other hand, the outer shape of the upper attachment plate is formed in a rectangular shape. Needless to say, the quadrangle does not necessarily have to be a square. Further, even when the upper mold is formed so as to be connected to the outer peripheral edge of the upper supplementary plate on the same plane as the supplementary plate,
Alternatively, the present invention can be applied to a case where a rectangular shape is formed by four sides raised along the outer peripheral edge.

With regard to the method of supporting the auxiliary plate for placing concrete, a frame for erection may be formed as in the prior art, and erection and support may be provided. You may make it. As the mold, a panel-shaped metal mold or an aluminum mold is suitable, but the type is not particularly limited. The temporary fixing of the anchor material to the attachment plate is performed by, for example, using the fixing bolt or the temporary fixing bolt and screwing into the female screw portion formed in the anchor material through the insertion hole formed in the attachment plate. It is possible by fixing.
In this case, if a centering means for aligning the center of the fixing bolt or the bolt for temporary fixing with the insertion hole formed in the auxiliary plate is provided, the bolt can be screwed to the female screw portion of the anchor member by the screwing action. Since the insertion hole of the attachment plate and the center of the anchor material automatically coincide with each other, the condition is good. Furthermore, from the point of reinforcing the temporarily fixed state and maintaining the fixed state of the anchor material side when the fixing bolt is loosened for some reason after installation of the seismic isolation device, the actual harm of heat effect between the anchor material and the attachment plate It is also possible to use spotless welding in an auxiliary manner. In that case, in the factory, after each anchor material was spot-welded to a predetermined position of the auxiliary plate, an adhesive tape for preventing intrusion of dust or the like was attached to the insertion hole of the auxiliary plate, or a cap was applied. It is also possible to carry in the state on site. In addition, when installing the seismic isolation device on the lower concrete, it is of course possible to place it on the upper surface of the attachment plate and install it between the foundation concrete cast below the attachment plate and the lower surface of the attachment plate. For example, when filling the non-shrink mortar, if the state of the upper surface of the non-shrink mortar itself sufficiently satisfies the installation conditions, the additional plate is removed for reuse, and the non-shrink mortar itself is removed. It is also possible to mount the seismic isolation device directly on the upper surface.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of the installation state showing the installation completion state of the seismic isolation device. In the figure, reference numeral 1 denotes a known seismic isolation device, which is composed of a laminate or the like in which a plate-like rubber and a steel plate are alternately laminated, and has upper and lower fixing flanges 2 and 3. The lower side of the seismic isolation device 1 is placed on the upper surface of the auxiliary plate 4 via the lower flange portion 2 and anchored in the base concrete 6 constituting the lower concrete portion using the fixing bolts 5. 7 is fixed by tightening it against the female screw portion. The anchor member 7 has, for example, a long nut portion having a hexagonal outer shape as shown in the drawing and a female screw formed in the center, and a fixing bolt portion screwed to the long nut portion. . Insert holes corresponding to the insertion holes for the fixing bolts 5 formed in the flange portion 2 of the seismic isolation device 1 are formed in the attachment plate 4, and the fixing bolts 5 penetrate through the insertion holes. Then, the flange 2 is configured to be screwed into the female screw portion formed on the anchor member 7 and directly tighten the flange 2 to the anchor member 7 itself. That is, unlike the conventional base plate, the attachment plate 4 only needs to function for positioning the anchor member 7 and for forming the installation surface of the seismic isolation device 1, and transmits the anchoring force of the anchor member 7 to the seismic isolation device 1. There is no need to do this. Further, in the present embodiment, the non-shrink mortar 8 is filled between the foundation concrete 6 and the base plate 4 to improve the adhesion between the base plate 6 and the base concrete 6.

On the other hand, the upper part of the seismic isolation device 1 is fixed to a frame supporting part 10 such as a column base constituting an upper concrete part formed on the upper auxiliary plate 9 via the upper flange part 3. Is done. The fixing method is based on the seismic isolation device 1 described above.
This is performed by directly fastening the flange portion 3 to the female screw portion of the anchor member 12 fixed in the frame supporting portion 10 using the fixing bolt 11. It should be noted that a skeleton is to be sequentially constructed on the skeleton support portion 10. In the figure, reference numeral 13 denotes an installation portion of the seismic isolation device 1 such as discarded concrete or pressure-resistant slab.

FIGS. 2 and 3 are schematic plan views schematically showing an embodiment relating to the lower auxiliary plate 4. FIG. As shown in the drawing, the lower attachment plate 4 has an octagonal outer shape, and is located at a position corresponding to an insertion hole for a fixing bolt 5 formed in the flange portion 2 of the seismic isolation device 1. An insertion hole 14 through which the fixing bolt 5 can be inserted is formed. As will be described later, the anchor member 7 is temporarily fixed by bolts through the insertion holes 14. In the embodiment of FIG. 2, the lower mold 15 is formed in a rectangular shape so as to be in contact with every other four sides a, c, e, and g of the attachment plate 4, and each corner of the mold 15 is attached. The other sides b, d, f,
and lower concrete is poured from a gap 16 formed between the lower concrete and the lower concrete. In the figure, 17 is an opening, 18 is a vent, 19
Reference numeral denotes a female screw for a support bolt when the attachment plate 4 is installed. Further, the embodiment of FIG. 3 shows a case where the lower mold 20 is formed so as to be separated from the auxiliary plate 4,
In this case as well, a wide gap portion 21 is formed at each corner of the formwork 20, and the lower concrete is cast through this portion in the same manner.

FIGS. 4 and 5 show the upper attachment plate 9.
FIG. 2 is a schematic plan view schematically showing an example relating to FIG. As shown in the drawing, the upper attachment plate 9 has a rectangular outer shape, and is provided at a position corresponding to an insertion hole for the fixing bolt 11 formed in the flange portion 3 of the seismic isolation device 1. An insertion hole 22 through which the bolt 11 can be inserted is formed, and the anchor member 12 is temporarily fixed through the insertion hole 22. In the embodiment of FIG. 4, the upper mold frame 23 is formed in a rectangular shape along the outer shape of the attachment plate 9. In addition, in the case of the upper attachment plate 9, since the upper concrete is cast thereon, the opening 17
No ventilation holes 18 are required. Further, the embodiment of FIG. 5 shows a case where an upper concrete having a bottom surface part flush with the attachment plate 9 is formed around the attachment plate 9. In this embodiment, form plates 24 to 27 are provided so as to be connected to the four sides a to d constituting the outer peripheral edge of the attachment plate 9 and to be flush with the attachment plate 9, The upper formwork 30 is formed by these formwork plates 24-27 and vertical formwork plates 28 and 29 erected on both sides thereof.
Is formed. As described above, in the present invention, along the outer shape of the attachment plate 9 whose outer shape is square,
Since the molds 23 and 30 are formed so as to be in contact with the outer peripheral edge, workability regarding the mold formation is extremely good.

Next, the operation of forming the foundation concrete 6 constituting the lower concrete will be specifically described with reference to the case shown in FIG. 2 as an example. FIG. 6 is a perspective view showing an embodiment embodying the case shown in FIG. 2, and FIG. 7 is a plan view of the embodiment. As shown in the figure, in this embodiment, the mold 15 is formed in a square shape using four panel-shaped mold plates 31 so as to be in contact with every other four sides of the auxiliary plate 4 as described above. A gap 16 is formed at each corner of the mold 15. The form plates 31 are assembled so as to be vertically slidably joined to a rising wall portion 33 formed on a lower form member 32 fixed at a predetermined position on the installation portion 13. That is, the height of the mold 15 can be adjusted by slidably assembling the mold plate 31 constituting the upper mold material with the lower mold material 32. As described above, in the present invention, since each of the form plates 31 constituting the form 15 is formed so as to be in contact with every other four sides of the auxiliary plate 4, the assembling work is easy and the strong form Can be formed.

In assembling the formwork 15, first, the lower formwork material 32 is fixed using a post-installed anchor or the like (not shown) in accordance with the formation position of the foundation concrete 6 on the installation portion 13. Thereafter, the mold plate 31 is set in a state where the inner surface thereof is joined to the rising wall portion 33 of the lower mold material 32, and is tightened and fixed via an L-shaped bracket 35 using a separator 34 for maintaining a gap. . In the drawing, reference numeral 36 denotes a support bolt for height adjustment, and when the form plate 31 is fixed by the separator 34, the height of the form plate 31 is adjusted by rotating the support bolt 36. Things. Reference numeral 37 denotes a reinforcing steel bar arranged in the formwork 15.

When the attachment plate 4 is erected, the anchor member 7 is temporarily fixed by the fixing bolt 5 or the temporary fixing bolt 38 or the like through each insertion hole 14 formed in the attachment plate 4 in advance. deep. The attachment plate 4 to which the anchor member 7 has been temporarily fixed is fixed to an attachment plate erection member 39 made of an angle member or the like by a mounting bolt 40 via the female screw 19 as shown in the figure, and forms the mold 15. It is erected between the facing form plates 31. At that time, it is fixed via the support 41 as needed. Then, as described above, the attachment plate 4 is connected to the attachment plate
If the horizontal state of the auxiliary plate 4 is not correct after the interposition between the opposing portions of the formwork 15 via the through hole, the height of the formwork plate 31 is finely adjusted by the support bolts 36 to correct the correction. It is possible.

When the installation of the attachment plate 4 to which the anchor member 7 is temporarily fixed between the facing portions of the formwork 15 is completed, the operation shifts to the operation of placing the foundation concrete 6 constituting the lower concrete. In this case, the work is divided into two stages, and first, a portion of the foundation concrete 6 is poured with concrete to a predetermined height, and after solidification, the space between the foundation concrete 6 and the auxiliary plate 4 is filled with non-shrink mortar. Thus, the adhesion between the foundation concrete 6 and the lower surface of the auxiliary plate 4 can be improved. Since the concrete placing operation and the non-shrink mortar filling operation can be performed through the gaps 16 formed at the respective corners of the formwork 15, the reinforcing bars 37 and the like are densely arranged. However, a reliable filling state can be obtained very easily. Note that the opening 1 is
Since the air holes 7 and the air holes 18 are formed, air does not accumulate in the central portion of the auxiliary plate 4 when filling the non-shrink mortar, and the work is easy. Further, the opening 17 can be used as an inlet for concrete or non-shrink mortar as required.

When the non-shrink mortar is solidified, the attachment plate erection member 39 and the like are removed, and the mold 15
Is disassembled and removed, the upper surface of the attachment plate 4 is cleaned, the bolts 38 for temporary fixing are removed, the seismic isolation device 1 is placed on the attachment plate 4, and the fixing bolt 5 is attached to the flange 2.
The seismic isolation device is screwed into the female thread of the anchor member 7 fixed to the foundation concrete 6 by being inserted into the insertion hole formed in the base plate 4 and the insertion hole 14 formed in the attachment plate 4. The installation work on the lower concrete side of 1 is completed.

Thereafter, the rectangular attachment plate 9 is placed on the flange portion 3 above the seismic isolation device 1 as described above, and the anchor member 12 is inserted into the insertion hole and the attachment plate 9 formed in the flange portion 3. Is fixed by the fixing bolt 11 through the insertion hole 22 formed in the above. Then, as shown in FIG. 4 or FIG. 5, upper molds 23, 30 are formed along the outer shape of the auxiliary plate 9, and a frame supporting portion 10 such as a column base or the like that constitutes upper concrete is formed above the upper molds 23, 30.
Will be cast. As described above, in the present invention, since the upper auxiliary plate 9 is formed in a rectangular shape and the upper molds 23 and 30 are formed along the outer shape, the mold forming operation is very simple.

8 and 9 show another embodiment. FIG. 8 is a front view of the embodiment, and FIG. 9 is a plan view of the embodiment. As shown in the drawing, also in this embodiment, the formwork 42 is formed in a square shape by using four panel-like formwork plates 43 as shown in FIG. It is the same as the previous embodiment in that concrete is cast through gaps 44 formed at each corner of the formwork 42. A similar through-hole is formed in the attachment plate 4 at a position corresponding to the through-hole for the fixing bolt 5 formed in the flange portion 2, and a temporary fixing bolt 45 or the like is inserted through the through-hole. There is no different point in that the material 46 is temporarily fixed, and the concrete 46 is erected at a predetermined position while being supported by the attachment plate erection member 47 and cast concrete. However, there is a difference in the manner in which the attachment plate installation member 47 is installed. That is, in the present embodiment, as shown in FIG. 8, the fixed angle member 48, the vertical angle members 49 erected on both sides of the fixed angle member 48, and the horizontal angles erected between the vertical angle members 49. As shown in FIG. 9, the erection frame 51 made of the material 50 is installed on both sides outside the position where the formwork 42 is formed, and the additional plate erection member 47 is erected between the horizontal angles 50 of the erection frames 51. It is different in that it was done. Thus, in this embodiment, first, the erection frames 51 on both sides are formed, and the erection frames 51 are formed.
An attachment plate erection member 4 supporting the attachment plate 4 between each other
7, and then a mold frame 42 is formed along the outer shape of the attachment plate 4. In that case, the formwork 42
Are formed in a rectangular shape so as to contact every other four sides of the auxiliary plate 4,
As a result, concrete is poured through the gaps 44 formed at the respective corners of the formwork 42, so that the work relating to the assembling work of the formwork 42 and the work of placing the lower concrete are performed in the same manner as in the above embodiment. Can be improved. The upper concrete forming operation is the same as that of the above embodiment.

In the above description of the specific embodiment illustrated in FIGS. 6 to 9, only the case where the embodiment illustrated in FIG. 2 is embodied has been described, but as illustrated in FIG. The present invention can be similarly applied to a mode in which the plate 4 is set apart from the mold 20. In short, lower plate 4
Any shape may be used as long as it forms an octagonal shape, forms a gap at each corner of the rectangular formwork, and casts concrete using at least the gap at the corner. Similarly, as for the upper attachment plate 9, the outer shape may be formed in a quadrangle, and as shown in FIG. 4 or 5, any form may be used as long as the mold is formed using the outer peripheral edge of the quadrangle.

As described above, the anchor members 7,
When the temporary fixing is performed while positioning the first and second bolts 12 and 46 through the insertion holes formed in the auxiliary plates 4 and 9, the fixing bolts 5 and 11 or the temporary fixing bolts 38 and 45 and the auxiliary bolts 4 and 9 are formed. If a centering means for aligning the center with the inserted insertion holes 14, 22 and the like is provided,
Both centers are automatically matched by the screwing action of the anchor members 7, 12, 46 to the female screw portion 52, so that it is extremely convenient. FIGS. 10 and 11 show examples of the centering means. FIG. 10 shows a fitting part having little play with respect to the insertion hole 14 formed in the attachment plate 4 as a centering means at the base of the bolt 38 for temporary fixing. 53 are formed. FIG.
In the first type, a center washer 54 having a tapered guide portion at the lower portion is fitted to, for example, a bolt 38 for temporary fixing, and the centering is performed via the tapered guide portion of the center washer 54 by the tightening action. is there.

[0022]

According to the present invention, a supplementary plate is used in place of the conventional base plate, and a combination of a square and an octagon is used as the outer shape of each supplementary plate applied to the upper and lower flanges of the seismic isolation device. As a result, the following effects can be obtained. (1) Since the lower attachment plate is formed in an octagonal shape, a work space for concrete casting is automatically formed at the corner of the lower formwork, so that workability related to the casting work is extremely good. It is. Further, in the case where the lower mold is formed in a quadrangular shape in contact with every other four sides of the auxiliary plate, the workability of the mold forming operation is improved. (2) Since concrete is cast through at least the gap formed at the corner of the lower formwork, even in a state where reinforcing bars and the like are densely arranged in the formwork. A reliable filling state can be easily obtained. (3) Further, since the upper attachment plate is formed in a square shape, the shape of the connection portion with the attachment plate when forming the upper mold is rectangular, so that workability related to the mold forming operation is improved. . Further, when the upper mold is formed in a rectangular shape along the outer shape of the auxiliary plate, the workability is further improved. (4) Further, the attachment plate according to the present invention is only required to be able to temporarily fix the anchor material to a predetermined position accurately and to be able to form the installation surface of the seismic isolation device. Since it is not necessary to have a strength capable of transmitting the anchoring force of the anchor material itself, the thickness can be reduced and the weight can be reduced. (5) Further, since the seismic isolation device is configured to be directly fixed to the anchor material via the fixing bolt, complete welding of the anchor material to the auxiliary plate can be eliminated. Deformation of the attachment plate due to the accompanying thermal influence can be avoided.

[Brief description of the drawings]

FIG. 1 is an installation state explanatory view showing an installation completed state of a seismic isolation device.

FIG. 2 is a schematic plan view showing an embodiment relating to a lower attachment plate.

FIG. 3 is a schematic plan view showing another embodiment of the attachment plate.

FIG. 4 is a schematic plan view showing an embodiment relating to an upper auxiliary plate.

FIG. 5 is a schematic plan view showing another embodiment of the attachment plate.

FIG. 6 is a perspective view showing an assembled state of the embodiment of the present invention.

FIG. 7 is a plan view of the same.

FIG. 8 is a front view of another embodiment of the present invention.

FIG. 9 is a plan view of the same.

FIG. 10 is a longitudinal sectional view illustrating a centering means.

FIG. 11 is a longitudinal sectional view illustrating a centering means.

[Explanation of symbols]

1 ... seismic isolation device, 2, 3 ... flange part, 4 ... auxiliary plate,
5: fixing bolt, 6: base concrete, 7: anchor material, 8: non-shrinkable mortar, 9: attached plate, 10 ...
Structural support, 11: fixing bolt, 12: anchor material,
13 installation part, 14 insertion hole, 15 lower formwork, 16
... gap, 17 ... opening, 18 ... vent, 19 ... female screw, 20 ... lower mold, 21 ... gap, 22 ... insertion hole,
23 ... upper formwork, 24-27 ... horizontal formwork plate, 28,
29 ... vertical form plate, 30 ... upper form plate, 31 ... form plate, 32 ... lower form material, 33 ... rising wall, 34 ... separator, 35 ... L-shaped fitting, 36 ... support bolt, 37
... Reinforcing bars, 38 ... Temporary fixing bolts, 39 ... Additional plate erection member, 40 ... Mounting bolts, 41 ... Support base, 42 ... Form frame, 43 ... Form plate, 44 ... Gap, 45 ... Temporary fixing Bolts, 46 ... anchor material, 47 ... additional plate erection member,
48: fixed angle, 49: vertical angle, 50: horizontal angle, 51: erection frame, 52: female screw part, 53 ...
Fitting part, 54 ... Center washer

Claims (2)

[Claims] An upper and lower attachment having a through-hole through which a fixing bolt can be inserted corresponding to an through-hole of a fixing bolt formed on each of a flange portion provided at an upper portion and a lower portion of the seismic isolation device. Using a plate, while embedding the anchor material having a female screw portion that can be screwed with the fixing bolt in a predetermined position in the upper and lower concrete while supporting the anchor material corresponding to each insertion hole of those additional plates, A method of installing a seismic isolation device that installs a seismic isolation device at a predetermined position by tightening and fixing each of the flange portions to those anchor materials fixed in upper and lower concrete through fixing bolts. Then, the outer shape of the lower auxiliary plate is formed in an octagon, and the lower concrete is struck through at least a gap formed in a corner of a rectangular formwork formed around the auxiliary plate. A method for installing a seismic isolation device, comprising: forming an outer shape of the upper auxiliary plate in a rectangular shape, forming a form in contact with an outer peripheral edge thereof, and placing an upper concrete. 2. A gap formed at a corner of at least a corner of the lower frame, wherein the lower frame is formed in a quadrilateral shape so as to be in contact with every other four sides of the octagon-shaped lower auxiliary plate. The lower concrete is cast through the portion, and the upper mold is formed in a square shape along the outer peripheral edge of the upper auxiliary plate formed in a square shape, and the upper concrete is cast. Item 4. The method for installing a seismic isolation device according to Item 1.