JPS61277737A - Apparatus for fixing pillar leg - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION ``α1 Pregnancy (Industrial Application Field) This invention relates to a column base fixing device suitable for use when fixing column bases of house units, etc. of prefabricated houses to foundations.

(Prior art) Conventionally, column bases for prefabricated houses, etc.
It was fixed as seen in Publication No. 03 and Japanese Utility Model Publication No. 57-6651. That is, an anchor bolt is buried in the foundation, and an end plate provided at the lower end of the pillar base of the house unit is fixed to the upper end of the anchor bolt.

(Problems to be Solved by the Invention) When a moment is applied to a house during strong winds or an earthquake, a tensile load acts on the column base, but in the above configuration, this tensile load is received by the anchor bolt. However, since these anchor bolts are buried almost perpendicularly to the foundation, their connection strength with the foundation in the tensile direction is relatively weak, and they may not be able to withstand excessive tensile loads.

1- (Means for solving the problem) This invention was made to solve the above problem, and its gist is that in a device for fixing a column base to a foundation,
b) Support metal fittings formed in a portal shape, with both legs extending downward from the upper plate part thereof, embedded in the foundation and placed on both sides of the main reinforcement extending substantially horizontally along the foundation; (b) a bar that spans between both legs of the support metal fittings, intersects with the main reinforcement, and is placed below the main reinforcement; (c) a bar that is provided at the lower end of the column leg and that supports the support metal fittings; and an end plate portion fixed to the upper plate portion of the column pedestal fixing device.

(Function) When a tensile load is applied to the column base, the bar stretched between both legs of the support metal fitting is locked to the main reinforcing bars in the foundation, so the tensile load is received by the main reinforcing bars. The main reinforcement is long and extends almost horizontally along the foundation, so
It can also withstand the excessive tension load of a single bow.

(Example) Hereinafter, the work of fixing a column base of a house unit of a prefabricated house using a column base fixing device which is an embodiment of the present invention will be described below.
The explanation will be given in order based on FIGS. 2 to 4 and FIG. 1.

First, as shown in FIG. 2, concrete is poured and hardened into two formworks 1 facing each other at a predetermined distance apart, and a foundation 2 is constructed. Prior to filling with concrete, the support fitting 10 is supported at the column base fixing position.

The support fitting 10 is made of a gate-shaped metal plate, and has both legs 11, 12 and a top plate 13. The upper plate portion 13 has an insertion hole 13a formed therein. One leg portion 11 has a vertical portion 1 extending downward from the upper plate portion 13.
1a, a sloped part 1111+ that slopes inward from the lower end of the vertical part 11a, a vertical part 11c that extends further downward from the sloped part 11b, and a lower third flange lid that extends horizontally inward from the lower end of the vertical part 11a. have. The other leg portion 12 includes a vertical portion 12a extending downward from the upper plate portion 13, a horizontal portion 12b extending inward from the lower end of the vertical portion 12a, and a vertical portion extending upward from the inner end of the horizontal portion 12b. 12c, and an upper flange 12.4 extending horizontally inward from the upper end of the vertical portion 12c.6 The upper plate portion 13 of the support fitting 10 is fixed to the plate 22. That is, the plate 22 is stretched between the formworks 1 and fixed with clips 23. The plate 22 is a flat plate part 22
a, and maintains this flat plate portion 22a horizontally.

An insertion hole 22b is formed in the center of the flat plate portion 22a, and the insertion hole 22b and the insertion hole 1 of the support fitting 10 are connected to each other.
The upper plate part 13 of the support metal fitting 10 is fixed by inserting a bolt 24 into 3a from above and tightening it together with a nut 25 disposed below.

In addition, between both formworks 1, two upper and lower main bars 26 made of long reinforcing bars are arranged almost horizontally along the formwork 1.
Both legs 11 and 12 of the support fitting 10 are fixed to this main reinforcement 26. That is, the lower flange lid of one leg 11 is placed on the lower surface of the lower main reinforcement 26, and the upper flange 1 of the leg 12 is
2d to the top surface of the upper main reinforcement 26 6 and bolt 2
7 (bar) to the vertical parts 11e and 12 of both legs 11.12.
a nut 28 that is inserted into the bolt 27 and screwed into the bolt 27.
Fix it with. The bolts 27 were arranged almost horizontally between the two main reinforcements 26, and the upper plate part was kept horizontal by pouring the concrete in such a state that it was perpendicular to the main reinforcements 26. In this state, fix the support fitting 1° to the foundation 2. The upper plate portion 13 is spaced apart from the upper surface of the foundation 2 by a predetermined distance.

After building the base ra2, remove the formwork 1 and install the bolts 24,
Remove the nut 25 and plate 22 from the base 2.

Next, as shown in FIG.
0 through the insertion hole 13a. Since the diameter of the insertion hole 13a is slightly larger than the diameter of the head 30a of the support bolt 30, the support bolt 30 can be inserted into the insertion hole 13a from above with the head 30a facing down. The support bolt 30 is fixed to the support fitting 10 by two washers 31 and 32 and a nut 33. Become a master,
The washer 31 has an insertion hole 31a extending from the center to one side I & main.
After the support bolt 30 is inserted into the insertion hole 13a, the washer 31 is interposed between the upper plate part 13 and the head 30a from the lateral direction, and the insertion hole 31a is inserted into the support bolt. 30 through the shank portion 30b. Further, the washer 32 is inserted into the upper plate part 13 by inserting the insertion hole 32a formed in the center of the washer 32 into the shank part 30b from above.
Place it on top of the . Then, attach the nut 33 to the shank part 30.
By screwing and tightening the support bolt 30
is fixed to the support fitting 10. The support bolt 30 projects vertically upward. Prior to fixing the support bolt 30, the horizontal position of the support bolt 30 is adjusted within the gap between the shank portion 30b and the insertion hole 13'a,
Thereby, the support bolt 30 is accurately aligned with the desired position.

As shown in FIG. 4, a nut 34 is screwed onto the support bolt 30, and the upper surface of the nut 34 is adjusted to a desired height. After making this adjustment, tighten the height adjusting nut 34 to the lock nut 35.
Fixed by

Next, the protective cap 36 is placed over the shank portion 30b of the support bolt 30. Further, a formwork 37 is arranged on the upper surface of the foundation 2 so as to surround the support fitting 10, and this formwork 37
The inside is filled with mortar 38 (grout material).

After filling the mortar 38, the pillar base 40 of the house unit Y is set before the mortar 38 hardens. The column base 40 is composed of, for example, a cylindrical column body (not shown) and a hollow hexahedral joint box 41 fixed to the lower end of the column body. The lower surface portion of this joint box 41 becomes the end plate portion 42 of the column base 40. An insertion hole 42a is formed in the center of this end plate portion 42, and relief holes 42b are formed in the four corners thereof. Then, while the house unit is suspended by a crane or the like, the column base 40 is lowered, and the end plate portion 42 of the column base 40 is placed on the mortar 38. This mortar 38
Since it is soft, a part of it overflows from the formwork 37 and a part of it escapes from the escape hole 42b of the end plate part 42. At this time, the mortar 3 on the upper part of the support bolt 30 is protected by the protective cap 36.
8 can be prevented from adhering. Then, the lower surface of the end plate U42 hits the height adjustment nut 34 and its descent is stopped.
The height of the column base 40 is determined.

If there is a slight manufacturing error in the house unit, since the supporting metal fitting 10 is gate-shaped and the portion above the foundation 2 can be slightly deformed, the manufacturing error in the house unit can be absorbed. Reliable fixation can be achieved.

Next, as shown in FIG. 1, the protective cap 36 is removed, and the end plate 42 of the column base 40 is attached to the support bolt 30 by screwing and tightening the nut 39 to the support bolt 30.
Fixed to. In this state, the mortar 38 is hardened. The nut 39 is tightened by inserting a tightening jig through a working opening formed in the joint box 41.

The column base 40 is fixed in the manner described above.

In this fixed state, the downward load (compressive load) from the column base 40 can be received by the concrete foundation 2 through the support bolts 30 and the support fittings 10, and can also be received by the foundation 2 through the mortar 38. You can receive it at Further, when a tensile load is applied, the bolt 27 receives an upward force through the support bolt 30 and the support metal fitting 10, and is locked to the upper main reinforcement 26. As a result, the main reinforcement 26 receives a tensile load. The main reinforcement 26 is long and basic! i! Since it is buried almost horizontally in the foundation 2, the connection strength with the foundation 2 is especially high in the tensile direction (direction orthogonal to the main reinforcement 26), and it can resist excessive tensile loads. Further, one leg 11 of the support fitting 50 has an inclined part 11b and a lower flange lid, and the other leg 12 has a horizontal part 12b and an upper flange 12d.
Because it has a relatively high connection strength with the foundation 2, and because the lower flange lid is engaged with the lower main reinforcement 26, the strength against tensile loads is further increased. Can be done Z-.

This invention is not limited to the above-mentioned embodiments, and various embodiments are possible. For example, in the embodiment shown in FIG. 5, a different support fitting 50 is used. The configuration of the pond is the same as in the above embodiment, so the same number will be given and detailed explanation thereof will be omitted. This support fitting 50 has a left-right symmetrical shape I&, and has an upper plate portion 53 having an insertion hole 53a and both leg portions 51.5.
2. Each leg 51,52 has a vertical section 5 at the top.
1a.

52a, horizontal parts 51b, 52b in the middle part, and vertical parts 51e, 52c in the lower part. Lower vertical portion 51c.

Two upper and lower bolts 27 are spanned between 52a and fixed with nuts 28. These bolts 27 are arranged below each main reinforcement 26 and contribute to improving the tensile strength.

In addition, in the two embodiments described above, the lower main reinforcement 26
can also be omitted. In this case, in the embodiment of FIG.
The lower bolt 27 may be omitted.

Furthermore, an end plate portion may be provided on the cylindrical column main body without using a joint box.

Light to "i" 1 As explained above, in this invention, since the tensile load can be received by the long main reinforcing bars buried almost horizontally in the foundation, it is possible to resist excessive tensile load.
The connection strength can be set to dog.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a column pedestal fixing device which is an embodiment of the present invention, Figs. 2 to 4 are sectional views sequentially explaining the work of fixing the column pedestal, and Fig. 5 is another embodiment. FIG. 2... Foundation, 10.50... Support metal fittings, 11, 12
゜51.52...Legs, 13.53...Top plate, 2
6...Main reinforcement, 27...Bolt (bar), 40...
Column base, 42...end plate part

Claims (1)

[Claims] (1) In a device for fixing a column base to a foundation, (a) both legs formed in a gate shape and extending downward from the upper plate are embedded in the foundation and are placed approximately horizontally along the foundation. (b) a bar that spans between both legs of the support metal fittings, intersects with the main reinforcement, and is placed below the main reinforcement; c) A column pedestal fixing device comprising: an end plate section provided at the lower end of the column pedestal and fixed to the upper plate section of the support fitting.