JP2561529Y2 - Foundation anchor bolt - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation anchor bolt which is erected in a foundation concrete which is to be cast in a formwork with a lower part embedded in the concrete.

[0002]

2. Description of the Related Art Conventionally, in order to lay foundation concrete in a formwork and bury the lower part of a foundation anchor bolt at the time of laying the foundation concrete, a construction procedure as shown in FIGS. .

[0003] That is, as shown in FIG.
After the supporting plate 2 is placed between the upper end surfaces 11 and 11 and the foundation anchor bolts 3 are supported by the supporting plate 2 in a hanging state, the foundation concrete 4 is poured into the formwork 1 and 1. I was

[0004] The top 4 of the foundation concrete 4
In order to obtain the level 1, the magnet 5 is magnetized so that the lower end face is positioned at a predetermined height of the inner surface of the metal mold 1 (the height of the top end 41 of the foundation concrete 4 to be cast). Then, the foundation concrete 4 was cast to the lower end face of the magnet 5 in the molds 1 and 1.

After the placement of the foundation concrete 4 is completed, as shown in FIG.
A plurality of nails 6 at appropriate positions on the top end 41 of the
Was poured into the base concrete 4 so as to be at the level of the top end 71 of the leveler 7 to be poured onto the base concrete 4, and then the leveler 7 was poured onto the base concrete 4.

Further, when the leveler 7 is poured and hardened, the peripheral portion of the foundation anchor bolt 3 at the top end 71 may sink, and the height and vertical deviation of the independent columns and the like attached to this portion may occur. There was fear.

Therefore, in order to adjust the height of the sunk portion 71a, as shown in FIG. 7, a spacer 8 is arranged on the sunk portion 71a around the base anchor bolt 3.

In FIGS. 5 and 6, reference numeral 9 denotes a support plate 2 mounted on upper end surfaces 11 of the molds 1 and 1.
In order to attach and support the bolt portion 31 at the upper end of the base anchor bolt 3, a nut is screwed to a portion of the bolt portion 31 protruding from the upper surface of the support plate 2.

[0009]

However, the above-mentioned conventional foundation concrete placing operation and the foundation anchor bolt 3 are to be solved.
In the embedding work, the leveling of the top end 41 of the foundation concrete 4 cast into the formwork 1, 1 and the leveling of the top end 71 of the leveler 7 poured onto the foundation concrete 4 are performed. The work to be performed and the work to adjust the height of the sinking portion 71a generated around the foundation anchor bolt 3 at the top end 71 of the leveler 7 must be performed separately.

[0010] For this reason, there is a problem that the number of work steps increases, the work time becomes longer, and labor is required, so that work efficiency is poor and troublesome.

In addition, since a series of operations described above requires three members, the magnet 5, the nail 6, and the spacer 8, there is a problem that the number of parts increases.

An object of the present invention is to solve the above-mentioned conventional problems.

That is, the leveling of the top of the foundation concrete poured into the formwork and the leveling of the top of the leveler poured onto the basic concrete can be performed at the same time. It is an object of the present invention to provide a foundation anchor bolt which does not require height adjustment of a submerged portion at an end.

[0014]

In order to achieve the above object, the present invention comprises an anchor bolt body having a bolt portion at an upper end, and an embedded nut screwed into the bolt portion. The lower surface is a reference surface indicating the top of the foundation concrete, and the upper surface is also a reference surface indicating the top of the leveler to be poured onto the foundation concrete.

[0015]

[Function] First, the bolt at the upper end of the anchor bolt body is supported by a support plate or the like bridged between the upper end faces of the form on which the foundation concrete is cast, and the anchor bolt body is suspended in the form. Let it.

Next, the embedding nut screwed to the bolt portion of the anchor bolt body is positioned so that the lower surface thereof coincides with the top end of the foundation concrete cast in the formwork. The positioning of the embedded nut may be performed before the above-described hanging support.

In this state, the foundation concrete is poured into the above-mentioned formwork so that the top end thereof is located on the lower surface of the embedding nut.

After the casting of the foundation concrete is completed, a leveler is poured onto the foundation concrete.

At this time, since the upper surface of the embedding nut is a reference surface indicating the top end of the leveler, the leveler is poured until the top end is located on the upper surface of the embedding nut.

After the leveler has hardened, even if a subsidence portion is formed at the top end of the leveler around the anchor bolt main body, the height adjustment of the subsidence portion is automatically performed by the embedded nut.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a basic anchor bolt according to the present invention.

In FIGS. 1 to 4 showing this embodiment, the same components as those of the prior art are denoted by the same reference numerals.

FIG. 1 is an exploded perspective view showing an embodiment of a foundation anchor bolt according to the present invention before it is supported on a mold, and FIG. 2 is a supporting plate having a double construction of the foundation anchor bolt of FIG. FIG. 3 is a perspective view showing a state where the foundation concrete is suspended from the form via the like, FIG. 3 is a side view showing a state after the foundation concrete is cast into the form from the state of FIG. 2, and FIG.
After pouring the leveler onto the foundation concrete from the state of the above and hardening, remove the support plate etc., and embed the lower part of the foundation anchor bolt in the foundation concrete and the upper end bolt part protrudes upward and stands upright FIG.

The foundation anchor bolt 10 according to the present invention
Is composed of an anchor bolt main body 102 having a bolt portion 101 at an upper end, and an embedded nut 103 screwed to the bolt portion 101 described above.

As will be described later, the lower surface 103a of the embedding nut 103 is
1, and the upper surface 103b is also a reference surface indicating the top end 71 of the leveler 7 to be poured onto the foundation concrete 4 described above.

The embedding nut 103 has a substantially arc-shaped swastika shape in plan view, and has a female screw portion 1 in the center.
03d are provided, and the claw-shaped portions 103e
Is provided.

The base concrete 4 is cast into the formwork 1, 1.

A first support plate 21 is bridged between the upper end surfaces 11, 11 of the molds 1, 1.

That is, a plurality of stepped pins 2 (in this embodiment, two at each end, a total of four) are provided on the lower surfaces at both ends in the longitudinal direction of the first support plate 21.
1a is inserted into a plurality of pin insertion holes 12 provided from the upper end surfaces 11, 11 of the outwardly bent upper sides 1A, 1A of the molds 1, 1 to the lower surface (see FIG. 3). )
As a result, the first support plate 21 is bridged between the upper end surfaces 11 of the molds 1 in the positioned state.

The first support plate 21 has an opening 21b of a flat rectangular shape in the width direction at a portion near the center in the longitudinal direction.

Then, two second support plates 22 are bridged between the edges of the opening 21b on both sides of the formwork.

That is, the second support plate 22 has stepped pins 22a, 22a projecting downward on the lower surface near the both ends in the longitudinal direction, and these stepped pins 22a, 22a are provided. The first support plate 21 is inserted into the pin insertion holes 21c, 21c provided near the edges of both sides of the formwork of the opening 21b of the first support plate 21 (see FIG. 3).
Thus, in a state where the second support plate 22 is positioned, the opening 21 of the first support plate 21 is formed.
It is bridged between the both side edges of the formwork.

Further, a through hole 22b for inserting an anchor bolt is provided at a center portion in the longitudinal direction and a center portion in the width direction of the second support plate 22, and the through hole 22b is provided in the through hole 22b. The bolt portion 101 at the upper end of the anchor bolt main body 102 of the bolt 10 is inserted, and the nut 9 </ b> A is screwed to the bolt portion 101 on the upper surface side of the first support plate 22.

With this, the foundation anchor bolt 1
0 is the first support plate 21 and the second support plate 2
2 and is suspended in the molds 1 and 1.

An embedding nut 103 is screwed into the bolt portion 101 at the upper end of the anchor bolt main body 102 of the base anchor bolt 10 before the bolt portion 101 is supported by the second support plate 22. At this time,
By screwing the embedding nut 103 to the lowermost end of the bolt portion 101, positioning in the height direction is performed.

Next, the basic anchor bolt 10 having the above structure
The operation, ie, the mode of use, will be described.

First, between the side edges of the opening 21b of the first support plate 21 bridged between the upper end surfaces 11, 11 of the forms 1, 1 on which the foundation concrete 4 is cast. Anchor bolt body 10 in foundation anchor bolt 10
(2) The second support plate 22 supporting the bolt portion 101 at the upper end is bridged, and the anchor bolt main body 102 of the foundation anchor bolt 10 is suspended in the molds 1 and 1 (FIG. 2).
reference).

Next, the embedded nut 103 screwed to the bolt portion 101 at the upper end of the anchor bolt body 102 is
The lower surface 103a is positioned so as to coincide with the top end 41 of the foundation concrete 4 cast in the formwork 1, 1.
The positioning of the embedded nut 103 may be performed before the above-described hanging support.

In this state, the foundation concrete 4 is placed in the above-mentioned formwork 1, 1, and the top end 41 is embedded in the nut 103.
(See FIG. 3).

After the placement of the foundation concrete 4 is completed, a leveler 7 is poured onto the foundation concrete 4.

At this time, since the upper surface 103b of the embedding nut 103 serves as a reference surface indicating the top end 71 of the leveler 7, the leveler 7 is poured until the top end 71 is located on the upper surface 103b of the embedding nut 103. .

The embedding nut 103 in the above-described embodiment has a substantially arc-shaped swastika shape in plan view and is provided with claw-shaped portions 103e toward four sides on the outside. At the time of installation, when the lower part of the anchor bolt main body 102 is buried in the foundation concrete 4 in a state where the foundation anchor bolt 10 is inclined, the claw-shaped part 10 of the embedding nut 103 is formed.
By hitting 3e with a hammer or the like, there is an advantage that it can be separated from the surrounding concrete and can be reverted so that the bolt portion 101 at the upper end of the anchor bolt main body 102 is in a vertical state.

Further, in the above-described embodiment, the support plate is formed of the first support plate 21 and the second support plate 22.
And the support plate (first support plate 21) placed on the form and the support plate (second support plate 22) supporting the base anchor bolt 10 are separated. Since this operation can be performed, there is an advantage that this operation can be easily performed. Also, when one of the anchor bolt bodies 102 is tilted during concrete placement, the second
Can be lifted and corrected.

Next, the dimensions of each part of the actually used basic anchor bolt 10 of the present invention will be described.

The diameter of the anchor bolt body 102 is 14 m
m, the embedded bolt 10 in the bolt portion 101
3 The length of the portion protruding above the upper surface was 40 mm, the diameter between the outermost peripheral surfaces of the embedded nut 103 was 30 mm, and the thickness was 9 mm.

[0046]

As described above, in this invention, the lower surface of the embedded nut screwed into the bolt at the upper end of the anchor bolt main body is the reference surface indicating the top end of the foundation concrete, and the upper surface is also the above-mentioned foundation. Because it is the reference surface indicating the top of the leveler poured on concrete,
The leveling of the top of the foundation concrete poured into the formwork and the leveling of the top of the leveler poured onto the foundation concrete can be performed by the embedded nut, which is one member.

Further, even if the top end of the leveler around the foundation anchor bolt sinks due to the embedded nut, the upper surface of the embedded nut is at an accurate height. And can be installed accurately without the need for adjustment with spacers as in the past.

Therefore, unlike the prior art, many members are not required for leveling the top of the foundation concrete, leveling the top of the leveler, and adjusting the height of the sinking portion generated at the top of the leveler. Since each of these operations can be performed by the embedded nut, which is one member, the number of parts can be reduced.

Further, since each of the above-described operations can be performed as a series of continuous operations, the operation efficiency can be improved.

Further, since the foundation anchor bolt is composed only of the anchor bolt main body having the bolt portion at the upper end and the embedded nut screwed into the bolt portion,
The structure is simple and can be provided at low cost.

In addition, since the support plate for supporting the anchor bolt body is mounted on the upper surface of another support plate for mounting on the formwork, for example, as in the embodiment, a plurality of anchor bolts are provided. When the concrete is provided in the same place, the inclination at the time of placing concrete can be individually corrected.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a state before an embodiment of a foundation anchor bolt according to the present invention is supported on a formwork.

FIG. 2 is a perspective view showing a state in which the foundation anchor bolt of FIG. 1 is suspended and supported on a mold via a double supporting plate or the like.

FIG. 3 is a side view showing a state after the foundation concrete has been poured into the formwork from the state of FIG. 2;

FIG. 4 shows a state in which the leveler is poured onto the foundation concrete from the state shown in FIG. 3 and hardened, the support plate or the like is removed, the lower part of the foundation anchor bolt is embedded in the foundation concrete, and the upper end bolt part protrudes upward. It is a perspective view which shows the state which stood up.

FIG. 5 is a perspective view showing a state in which a lower portion of a conventional foundation anchor bolt is buried in foundation concrete and a top end of the conventional foundation concrete is leveled.

6 is a perspective view showing a state in which the leveling of the top end of the conventional leveler is performed from the state of FIG.

FIG. 7 is a perspective view showing a state in which the height of the lowering portion of the top end of the conventional leveler is adjusted from the state of FIG.

[Explanation of symbols]

 Reference Signs List 4 foundation concrete 7 leveler 10 foundation anchor bolt 21 first support plate 22 second support plate 41 top end 71 top end 101 bolt part 102 anchor bolt main body 103 embedded nut 103a bottom surface 103b top surface

Claims (2)

(57) [Scope of request for utility model registration] 1. An anchor bolt body having a bolt portion at an upper end thereof, and an embedded nut screwed into the bolt portion, a lower surface of the embedded nut being a reference surface indicating a top end of the foundation concrete, and an upper surface of the same. Is a reference surface indicating a top end of a leveler poured onto the foundation concrete. 2. A support plate attached to a bolt portion of an anchor bolt body above the embedding nut,
2. The support plate according to claim 1, wherein said support plate is mounted on another support plate provided at the upper end of the mold.
Foundation anchor bolt.