JP3231404U - Base plate mounting stand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pedestal for mounting a base plate which can perform high-precision and simple leveling of a support member, is not easily affected by the bar arrangement state of the gantry, and can simplify the construction. SOLUTION: The mounting stand 10 is arranged on a seismic isolation foundation for mounting a base plate, is configured by intersecting at least two steel materials 12a, and seismically isolates an end portion of each steel material 12a. The horizontal member 12 fixed to the main bar 52a of the foundation, the vertical member 14a erected in each space provided between the intersection of the horizontal members and the fixing portion with respect to the main bar 52a, and the adjustment provided on the top of the vertical member. The horizontal member 12 is provided with a bolt, and is characterized in that the horizontal member 12 is arranged along the extending direction of the vertical member 14a and is fixed by the vertical member 14b. [Selection diagram] Fig. 1

Description

In the present invention, a support member for the seismic isolation device (base plate for mounting the seismic isolation device, hereinafter simply referred to as a base plate) and an RC lower portion for the seismic isolation device (provided under the seismic isolation device). The present invention relates to a base plate mounting stand which is arranged between the reinforcing bars of the foundation and enables highly accurate and easy leveling and horizontal positioning (alignment in the X direction and Y direction) of the base plate.

In recent years, many buildings incorporating seismic isolation devices have been constructed. In such a building, a leveled base plate is placed on a base plate mounting stand (such as a steel stand composed of an angle frame) placed in the RC foundation, and a seismic isolation device is placed on this base plate. The structure is to place it.

As a method of arranging the base plate, for example, a method disclosed in Patent Document 1 is known. In the method disclosed in Patent Document 1, first, an anchor frame (base plate mounting stand) is installed in advance at the installation site of the seismic isolation device, and then reinforcement arrangement for constructing the foundation stand (seismic isolation foundation) is performed. I do. Then, after finishing the reinforcement arrangement for placing the concrete of the seismic isolation foundation, the base plate is placed on the height adjusting bolts constituting the base plate mounting stand to perform positioning. However, in such a method, the base plate mounting stand installed earlier may interfere with the reinforcing bars for the seismic isolation foundation, and there is a problem that the reinforcing bar arrangement efficiency is poor.

In view of these circumstances, a base plate installation method as disclosed in Patent Document 2 has been proposed. In the installation method disclosed in Patent Document 2, a plate-shaped mounting pedestal is fixed to a part of the main bar constituting the seismic isolation foundation, and an adjusting bolt for leveling is arranged on the mounting pedestal. .. After that, the base plate is placed on the adjusting bolts to level the level, the adjusting bolts and the fixing pedestal are positioned respectively, and the concrete of the mounting pedestal is placed.

Japanese Unexamined Patent Publication No. 2001-214636 Japanese Unexamined Patent Publication No. 2020-159105

If the installation method is as disclosed in Patent Document 2, the base plate mounting stand does not interfere with the arrangement of the seismic isolation foundation, and the construction is simplified and highly accurate. It is thought that leveling can be done. On the other hand, in the method disclosed in Patent Document 2, one mounting pedestal is inserted through a plurality of main bars and then positioned, and a plurality of the pedestals are arranged. For this reason, it is necessary to determine the placement interval of the main main bars, which is the basis, with high accuracy.

Therefore, in the present invention, the above-mentioned problems can be solved, the support member can be leveled with high accuracy and easily, the gantry is not easily affected by the bar arrangement state, and the construction can be simplified. The purpose is to provide.

The connecting hardware according to the present invention for achieving the above object is a mounting stand arranged on a seismic isolation foundation for mounting a base plate, and is composed of at least two steel materials intersecting with each other. A horizontal member whose end portion of each steel material is fixed to the main bar of the seismic isolation foundation, a vertical member erected in each space provided between an intersection of the horizontal members and a fixing portion for the main bar, and the vertical member. A height adjusting means provided on the top of the member is provided, and one or more sets of the horizontal members are arranged along the extending direction of the vertical member and fixed to the vertical member. And.

Further, in the base plate mounting stand having the above characteristics, the height adjusting means is composed of a long nut fixed to the top of the vertical member and an adjusting bolt screwed into the long nut. It is characterized by. According to having such a feature, the leveling of the base plate can be performed by adjusting the screwing amount of the adjusting bolt.

Further, in the base plate mounting stand having the above characteristics, the horizontal member is formed by intersecting flat steel, and the vertical member is made of angle steel. With such a feature, the buckling resistance against normal stress can be increased as compared with the case where the vertical member is made of flat steel.

Further, in the base plate mounting stand having the above-mentioned characteristics, a gripping member for gripping the main bar is provided at an end portion of the horizontal member. By having such a feature, it is possible to securely fix the connecting hardware to the main bar.

Further, in the base plate mounting stand having the above-mentioned characteristics, the horizontal member is characterized in that the intersection of the steel materials can be rotated. By having such a feature, it is possible to put a plurality of steel materials in parallel in a state of being superposed during storage or transportation. Therefore, it is possible to reduce the storage space and improve the transportation efficiency.

According to the base plate mounting stand having the above-mentioned characteristics, it is possible to perform high-precision and easy leveling of the support member. Further, the vertical member can be selected from its standing position on the horizontal member. Therefore, it is possible to arrange the beam at a position avoiding interference with the horizontal reinforcing bar such as the main reinforcing bar of the beam. Therefore, it is not easily affected by the bar arrangement state of the gantry, and the construction can be simplified.

It is a perspective view which shows the state which fixed the base plate mounting stand which concerns on embodiment to a main bar. It is a figure which shows the form when the base plate mounting stand which concerns on embodiment is seen in a plan view. It is a figure which shows the form when the base plate mounting stand which concerns on embodiment is seen sideways. It is a partially enlarged view for demonstrating the gripping member which fixes a base plate mounting stand to a main bar. It is an exploded view of the bar arrangement structure to which the base plate mounting stand which concerns on embodiment is applied. It is a figure which shows the application example of the base plate mounting stand which concerns on embodiment. It is a figure which shows the modification of the gripping member which fixes the base plate mounting base to a main bar.

Hereinafter, embodiments of the present invention for mounting a base plate will be described in detail with reference to the drawings. First, the configuration of the base plate mounting stand according to the embodiment will be described with reference to FIGS. 1 to 3. Note that FIG. 1 is a perspective view showing a state in which the base plate mounting stand according to the embodiment is arranged on the main bar of the seismic isolation foundation. Further, FIG. 2 is a diagram showing a form when the base plate mounting frame according to the embodiment is viewed in a plan view, and FIG. 3 is a diagram showing a form in the same side view.

[Constitution]
The base plate mounting stand (hereinafter, simply referred to as a mounting stand 10) according to the present embodiment is basically composed of a horizontal member 12 and vertical members 14a and 14b. The horizontal member 12 is a member that supports the vertical member 14a, which will be described in detail later, and is fixed to the main bar 52a that constitutes the seismic isolation foundation. Specifically, at least two strip-shaped flat steels (flat material, hereinafter referred to as steel material 12a) are arranged so as to be laminated in the plane direction, and then crossed with each other. As described above, each steel material 12a constituting the horizontal member 12 has its end fixed to the main bar 52a of the seismic isolation foundation. Therefore, the crossing angle of each steel material 12a may be determined by the relationship with the position of the main bar 52a that fixes the horizontal member 12. In the example shown in FIG. 2, the crossing angle of the two steel materials 12a is approximately 90 degrees.

Further, a through hole 12b for inserting the main bar 52a is provided at the end of the steel material 12a according to the present embodiment. The main bar 52a is inserted through the through hole 12b, and the grip member 20 described in detail later positions the main bar 52a with the main bar 52a. Therefore, in the present embodiment, the corners of both ends forming the fixed portion are reduced to form an arc shape. When the main bar 52a is inserted through the through hole 12b provided at the end of the steel material 12a, the end of the steel material 12a is located outside the main bar 52a. Therefore, by reducing the corners at the end of the steel material 12a, it becomes easy to secure the thickness (so-called cover thickness) from the surface of the concrete cast on the outside of the main bar 52a to the end of the steel material 12a.

The mounting stand 10 according to the present embodiment has a configuration in which at least two horizontal members 12 having such a configuration are arranged in the thickness direction. A vertical member 14b, which will be described in detail later, is arranged between the vertically arranged horizontal members 12, and a space is formed between the vertically arranged horizontal members 12. The vertical member 14b is arranged between the intersection of the steel members 12a constituting the horizontal member 12 and the through hole 12b formed at the end of the steel member 12a. Further, in the mounting stand 10 according to the embodiment, the vertical member 14b is also arranged at the intersection of the steel members 12a constituting the horizontal member 12.

With such a configuration, the strength of the horizontal member 12 can be increased, and the bending due to the stress applied to the vertical member 14a, which will be described in detail later, can be suppressed. Here, the number and the arrangement position of the vertical members 14b can be determined by the length of the steel material 12a constituting the horizontal member 12 and the positional relationship with the main bar 52a. Further, the vertical members 14a and 14b may be fixed to the horizontal member 12 by a method such as welding.

The vertical member 14a is an element for supporting the base plate 30 (support member: see FIGS. 5 and 6) for arranging and fixing the seismic isolation device (not shown) and for leveling the base plate 30. The vertical members 14a and 14b according to the present embodiment are made of angle steel (angle member). This is because the buckling resistance against normal stress is higher than that of flat steel. When the high buckling yield strength is used as the selection criterion, the vertical members 14a and 14b may be composed of groove steel (channel material), H steel, and I-shaped steel, but in terms of workability and price. It is more advantageous to select angle steel in.

The vertical member 14a is arranged so as to extend in the vertical direction from the upper horizontal member 12 unlike the element (vertical member 14b) connecting the horizontal members 12 arranged vertically. Specifically, it is provided so as to be arranged on an extension line of the vertical member 14b arranged between the intersection of the steel members 12a constituting the horizontal member 12 and the through hole 12b.

If the seismic isolation device is small and light, the foundation will also be small. Therefore, the dimensions of the horizontal member 12 may be small and short. In such a case, the vertical members 14a and 14b may be delicate members such as round steel and bolts.

A long nut 16 and an adjusting bolt 18 are arranged on the top of each vertical member 14a as adjusting means. The long nut 16 is fixed so that its through hole (not shown) is along the extending direction of the vertical member 14a. Further, the adjusting bolt 18 may have a bolt portion that is screwed into the long nut 16. In such an adjusting means, when the base plate 30 is supported by the head of the adjusting bolt 18, the level of the base plate 30 can be raised by adjusting the screwing amount of the adjusting bolt 18.

In the mounting stand 10 having the above configuration, when the main bar 52a constituting the seismic isolation foundation is a screw reinforcing bar, the grip member 20 uses the steel material 12a constituting the horizontal member 12 as shown in FIG. The horizontal member 12 may be positioned and fixed by screwing a nut into the main bar 52a so as to be sandwiched vertically.

[Action]
The mounting stand 10 having the above configuration can be applied to the foundation reinforcement 50 having the configuration shown in FIG. 5 as follows. That is, by assembling the reinforcements (seismic isolation foundation reinforcement 52) constituting the seismic isolation foundation separately from the foundation reinforcement 50, individual arrangement is possible.

The mounting stand 10 according to the embodiment is fixed to the main bar 52a of the seismic isolation foundation bar arrangement 52. By fixing to the seismic isolation foundation reinforcement 52, which is assembled separately from the foundation reinforcement 50, it is possible to avoid the trouble of fixing the arrangement at the site, reduce the labor amount, and improve the productivity. Further, the rigidity of the seismic isolation foundation reinforcement 52 can be increased by manufacturing the seismic isolation foundation reinforcement 52 by incorporating the mounting stand 10. Therefore, the handleability of the seismic isolation foundation reinforcement 52 at the time of transportation and installation can be improved.

At the site, as shown in FIG. 6, a seismic isolation foundation reinforcement 52 in which the mounting base 10 is fixed to the foundation reinforcement 50 is installed so as to be supported by the adjusting bolt 18 of the mounting base 10. Place the base plate 30. A plurality of anchors 32 hanging from the base plate 30 are fixed to the base plate 30 in advance. With such a configuration, the anchor 32 hanging from the base plate 30 is arranged inside the seismic isolation foundation reinforcement 52. Therefore, the fixing of the base plate 30 is completed by placing the concrete 60. The range indicated by the alternate long and short dash line in FIG. 6 is the casting range of the concrete 60.

[effect]
According to the mounting stand 10 having the above configuration, the base plate 30 which is a support member can be leveled easily and with high accuracy. Further, since it is sufficient that at least four points can be fixed to the main bar 52a, it is not easily affected by the reinforcing bar arrangement state of the foundation. Further, as in the above embodiment, the foundation reinforcement 50 and the seismic isolation foundation reinforcement 52 are separately configured, and after fixing the mounting stand 10 to the seismic isolation foundation reinforcement 52, the seismic isolation foundation reinforcement is arranged. By installing the 52 on the foundation reinforcement 50, it is possible to simplify the construction itself for installing the mounting stand 10 on the reinforcement arrangement.

[Modification example]
In the above embodiment, it is described that the steel material 12a constituting the horizontal member 12 is made of flat steel. However, for the steel material 12a, angle steel, channel steel, or the like may be used instead of flat steel.

Further, regarding the gripping member 20 used for fixing the steel material 12a to the main bar 52a, in the above embodiment, it is described that the main bar 52a is a screw reinforcing bar and the nut is arranged so as to sandwich the steel material 12a from above and below. However, the steel material 12a may be fixed as shown in FIG. That is, a gripping member 20 such as a clip is provided at the end of the steel material 12a, and the main bar 52a is gripped by the gripping member 20 to position and fix the steel material 12a. This is because even when the steel material 12a is fixed by such means, the effect of the mounting stand 10 according to the present invention can be obtained.

Further, in the above embodiment, it is described that the steel materials 12a constituting the horizontal member 12 are arranged in a laminated manner and intersect with each other, and are shown in the drawings. However, the number of steel materials 12a constituting the horizontal member does not necessarily have to be two, and if the structure can secure three or more fixed points with respect to the main bar 52a, three or four steel materials 12a intersect. It may be configured as follows.

Further, in the above embodiment, it is described that at least two (two sets) of the horizontal members 12 are arranged in the thickness direction in order to increase the strength thereof, and they are shown in the drawings. However, when the base plate 30 is small, the flat steel is shortened and the applied load itself is small, or when the flat steel is provided with ribs to reinforce the strength of the flat steel alone, the horizontal member 12 is used. May be one set.

Further, in the above embodiment, the steel materials constituting the horizontal member 12 are described as being laminated and crossed and fixed. However, the steel material (flat steel) constituting the horizontal member 12 may have a structure in which the intersection thereof can be rotated. Specifically, a means such as providing a through hole at an intersection and bolting the steel materials arranged in a laminated manner may be used. In addition, when using the steel material that is configured to be rotatable, it is advisable to spot-weld the steel materials that are laminated and arranged to prevent rotation.

With such a configuration, a plurality of steel materials can be stacked in parallel during storage and transportation. Therefore, the storage space can be reduced and the transportation efficiency can be improved.

10 ……… Mounting stand, 12 ……… Horizontal member, 12a ……… Steel material, 12b ……… Through hole, 14a ……… Vertical member, 14b ……… Vertical member, 16 ……… Long nut, 18 ………… Adjustment bolt, 20 ………… Grip member, 30 ………… Base plate, 32 ………… Anchor, 50 ………… Foundation reinforcement, 52 ………… Seismic isolation foundation reinforcement, 52a ………… Main reinforcement, 60 ……… Concrete.

Claims (5)

It is a mounting stand that is placed on the seismic isolation foundation to mount the base plate.
A horizontal member formed by intersecting at least two steel materials and fixing the end of each steel material to the main bar of the seismic isolation foundation.
Vertical members erected in each space provided between the intersection of the horizontal members and the fixing portion for the main bar,
A height adjusting means provided on the top of the vertical member is provided.
A base plate mounting stand characterized in that one or a plurality of sets of the horizontal members are arranged along the extending direction of the vertical members and are fixed to the vertical members. The height adjusting means includes a long nut fixed to the top of the vertical member and
The base plate mounting mount according to claim 1, further comprising an adjusting bolt screwed into the long nut. The horizontal member is constructed by crossing flat steel.
The base plate mounting stand according to claim 1 or 2, wherein the vertical member is made of angle steel. The base plate mounting stand according to any one of claims 1 to 3, wherein a gripping member for gripping the main bar is provided at an end portion of the horizontal member. The base plate mounting stand according to any one of claims 1 to 5, wherein the horizontal member is rotatable at an intersection of the steel materials.

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