JP2000038727A - Foundation concrete and execution therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide foundation concrete to particularly improve installation efficiency of a framework to a continuous footing in executing the work of constructing a steel house, etc., and provide its work execution method. SOLUTION: A concrete part 1 is formed by supporting an anchor plate 38 at a specified position between concrete formworks and flowing concrete between the formworks until it comes to roughly the same level as the anchor plate 38 in a state where an anchor bolt 32 is installed on a connecting nut 34 arranged and fixed on the anchor plate 38 with a specified interval. Thereafter, a formwork or a wooden form of a building structure is supported on the concrete part 1 by screwing a fixing bolt in the connecting nut 34 after leaving and curing the concrete part until it is hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation concrete such as a cloth foundation for supporting a framework of a building structure and a method of constructing the foundation concrete.

[0002]

[Related Background Art] In recent years, steel houses (Steel-Fra
med Housing) has been spotlighted as a safe and comfortable home with excellent earthquake resistance and durability. This steel house is constructed by forming a shape from lightweight shaped steel made of galvanized steel sheet of the same outer dimensions as wood and having a thickness of about 1 mm, and joining plywood and the like to this shape with drill screws. × 4 house. Since the framework that forms the framework is made of steel, it has excellent features such as excellent earthquake resistance and durability, non-flammability, no damage to termites, and stable material price and quality.

When installing the framework of this steel house, first, concrete pouring frames 2, 3 shown by two-dot chain lines in FIG. 4 are arranged at predetermined locations on the ground. In this form, a reinforcing bar 4 is horizontally disposed, and a plurality of anchor bolts 6 are attached to the reinforcing bar 4 using clips (not shown).
Is fixed at a predetermined location. Then, a predetermined amount of concrete is poured into the formwork and left to cure until the concrete hardens. After the concrete has hardened, the molds 2 and 3 are removed, and the concrete upper surface 8 (hereinafter, referred to as a “top end”) is leveled (so-called “top end leveling”). By this operation, a fabric base on which the anchor bolts 6 project at predetermined intervals from the top end is formed.

[0004] Next, a lower frame channel 10 of a steel house frame is installed on the above-mentioned cloth foundation. As shown in FIG. 5, the lower frame channel 10 is formed of a steel plate having a U-shaped cross section, and holes 10a and 10b for inserting anchor bolts are formed on both sides at predetermined intervals. Then, the opening of the lower frame channel 10 is oriented in the horizontal direction, and the channel reinforcing collar 14 is formed in the hole 10a of the lower frame channel 10 in correspondence with each anchor bolt.
The lower frame channel 10 is inserted into the holes 10a and 10b of the lower frame channel 10 while maintaining this state, and the lower surface of the lower frame channel 10 is 8 and placed on it.

Further, a nut 18 is screwed into each of the anchor bolts 6 projecting upward from the lower frame channel 10, and the lower frame channel 10 is fixed to the top end 8. In this way, the lower frame channel 10 of the framework is fixed to the cloth foundation.

[0006]

As described above, in the conventional construction method, the anchor bolt 6 to be planted in the foundation concrete is fixed to an appropriate place of the reinforcing bar 4 with a clip or the like, and the anchor bolt 6 is positioned. It is difficult to accurately manage the dimension between the anchor bolts 6, and the anchor bolts 6 are not necessarily all vertically attached to the reinforcing bar 4, but may be attached diagonally. As a result, when the concrete is poured into the formwork and hardened, the anchor bolts 6 are implanted into the top end 8 at irregular intervals and in irregular directions from the top end 8 of the concrete with the bolt tops protruding. Sometimes. Once the concrete has hardened, it is not easy to replant such anchor bolts 6 in the correct position and direction. For this reason, when placing the lower frame channel 10 on the top end 8, the anchor bolt insertion holes 10a and 10b may have to be reopened in accordance with the anchor bolt 6 installation state.

Further, since the upper portion of the anchor bolt 6 projects from the top end 8 in a stud shape, the frame cannot be temporarily placed on the cloth foundation. That is, the lower frame channel 10
The collar 14 is interposed in the lower frame channel 10 so that the inner hole 14a of the collar 14 is aligned with the insertion holes 10a and 10b of the collar 14, and the frame is lifted while maintaining this state. Insertion hole 10
b, it is necessary to perform an operation of mounting the lower frame channel 10 on the top end 8 so as to sequentially pass through the collar inner hole 14a and the bolt insertion hole 10a. Therefore, if the relative positions of the bolt insertion holes 10a and 10b of the lower frame channel 10 and the collar inner hole 14a are displaced even at one position, the anchor bolt 6 is inserted into the holes 10a and 10b of the lower frame channel 10. You will not be able to do it. Therefore, it is necessary to place the lower frame channel 10 on the top end 8 while performing alignment with the lower frame channel 10 of the collar 14, and this operation is troublesome. As a result, the conventional anchor bolt construction method has hindered the quick and accurate framework installation work that is characteristic of a steel house.

[0008] An object of the present invention is to provide a foundation concrete and a method for constructing a steel house, which greatly improve the ease of installation of a framework on a cloth foundation when constructing a steel house.

[0009]

In order to achieve the above object, a foundation concrete according to the present invention comprises a concrete portion for supporting a formwork or a wooden frame of a building structure, and an anchor buried in the upper end surface of the concrete portion. A plate, an anchor bolt embedded in a concrete portion, and a connection nut fixed to the anchor plate at a predetermined interval and connected to a fixing bolt for fixing the formwork or the wooden frame and the anchor bolt. It is characterized by the following.

In the foundation concrete according to the present invention, the anchor plate is supported at a predetermined position between the concrete forms while anchor bolts are attached to connection nuts arranged and fixed to the anchor plate at predetermined intervals,
Pour concrete between molds until it is almost flush with the anchor plate to form a concrete part, leave it to cure until the concrete part hardens, and then screw the fixing bolts to the connection nuts. It is constructed by supporting a formwork or a wooden frame of a building structure.

Preferably, in the foundation concrete according to the present invention, the anchor plate is bridged over the upper end of the concrete formwork, and a suspension bolt attached to the adjustment plate is screwed into the connection bolt to connect the anchor plate to the concrete formwork. It is constructed by supporting it at a predetermined position in between.

Since the upper portion of the anchor bolt does not protrude from the top end of the concrete unlike the conventional foundation concrete, the lower frame channel can be easily mounted on the top end.
In addition, since the screw holes of the connection nut are accurately arranged at regular intervals on the top of the concrete, the work of installing the lower frame channel on the top using the channel fixing bolts can be easily performed.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a basic concrete construction method according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, first, the anchor bolt embedding device 30 is assembled. This anchor bolt embedding device 30 is provided with an anchor plate 38 in which connection nuts 34 for attaching an anchor bolt 32 and a lower frame channel fixing bolt (fixing bolt) 58 are arranged at a predetermined interval, and is separated from the anchor plate 38 by a predetermined distance. An adjusting plate 42 whose both ends are bridged between the concrete forms 2 and 3 is attached to the adjusting plate 42 so that the height can be adjusted, and the lower end is a screw hole 34 of the connection nut.
and a hanging member 40 for screwing the anchor plate 38 to a desired position.

An anchor bolt embedding device 3 shown in FIG.
The zero connection nut 34 is fixed to the anchor plate 38 at predetermined intervals as shown in FIG. Connection nut 3
Numeral 4 denotes a flanged nut having a flange portion 34f formed on an upper edge portion as shown in FIG. 1. An anchor bolt 32 is screwed into a lower half portion of the nut portion 34n, which is a main body of the nut. A suspension bolt 40 is screwed into the half part.
A resin protection tube 46 for preventing concrete inflow, which is higher in height than the flange portion of the anchor plate 38, is fitted to the outer periphery of the flange portion 34f.

As shown in FIG. 2, the anchor plate 38
Has flanges on both sides to maintain rigidity,
This is a long steel plate having a U-shaped cross section opened upward and extending along the longitudinal direction of the cloth foundation to be laid. The anchor plate 38 is provided at predetermined intervals, that is, in accordance with the pitch of the channel mounting bolt insertion holes 10a and 10b drilled in the lower frame channel 10 of the frame to be fixed. The nut portion 34n of the connection nut 34 is inserted through the hole 38a from the opening side of the plate 38, and the flange portion 34f of the connection nut 34 is formed.
Are in contact with the periphery of the hole 38a. The connection nut 34 is welded to the anchor plate 38. In addition, instead of fixing by welding, the nut portion 34 of the connection nut 34 is used.
By forming a screw portion on the outer periphery of n and screwing another nut to this screw portion, the nut 34 is fixed by clamping the anchor plate 38 between the nut and the flange portion 34f of the nut 34. Is also good.

As shown in FIGS. 1 and 2, the adjustment plate 42 has an overall length longer than the interval between the concrete forms 2 and 3, and has an open upper section having flanges on both sides for maintaining rigidity. It is formed of a U-shaped steel plate. The adjusting plate 42 also has an elongated hole 42a at a substantially central portion through which the suspension bolt 40 can be inserted and the mounting position of the bolt 40 can be adjusted along the longitudinal direction of the adjusting plate 42 (therefore, in the width direction of the cloth foundation). The adjusting plate 42 further has cut-and-raised portions 42b and 42c for positioning the plate 42 with respect to the concrete forms 2 and 3 at predetermined positions near both ends, and the cut-and-raised portions 42b and 42c.
Is cut out like a tongue and bent downward.

The suspension bolt 40 and the adjustment plate 42
As shown in FIG. 1, the upper and lower positions are fixed by double nuts 54 and 55 so as to be adjustable.

The suspension bolt 40, the adjustment plate 42,
The suspension means is constituted by the double nuts 54, 55 and the like.

Next, a method of constructing the foundation concrete using the anchor bolt embedding device 30 as described above will be described.

First, the necessary number of anchor bolts 32 are attached to the connection nuts 34 of the anchor plate 38. The protection tube 46 is connected to the flange 3 of the connection nut 34.
Attach to 4f. Next, the nut 55 is attached to the suspension bolt 40.
After that, the suspension bolt 40 is connected to the adjustment plate 42
Through. The nut 54 is screwed into the suspension bolt 40, and the suspension bolt 40 is connected to the connection nut 34 of the anchor plate 38.
To screw. Then, the suspension bolt 40 is temporarily attached to the adjustment plate 42 by temporarily fastening the nut 54 and the nut 55.

Next, the adjustment plate 42 is suspended between the concrete forms, and the anchor plate 38 is suspended between the concrete forms. The height of the anchor plate 38 and the position in the width direction are adjusted with the nut 55, and the nut 5 is adjusted.
By tightening 4, the anchor plate 38 is firmly supported at a predetermined position between the concrete forms.

Next, an appropriate amount of concrete is poured into the concrete form until the height of the concrete reaches the upper end of the flange of the anchor plate 38 to form the concrete portion 1. Since the height of the protection tube 46 is higher than the height of the flange, the upper end of the protection tube 46 is located above the concrete surface. Therefore, the concrete does not flow into the inner hole 46 a of the protection tube 46, that is, the vicinity of the threaded portion between the connection nut 34 and the suspension bolt 40.

Thereafter, the concrete is left as it is until it hardens. As the concrete hardens, a part of the anchor bolt 32, the anchor plate 38, and the protection tube 46 are buried in the concrete part 1.

Next, the adjusting plate 42 and the suspension bolt 40
And remove work. This operation is performed in the following procedure.

First, the nut 54 is loosened sufficiently. Then, the suspension bolt 40 is rotated in the screw loosening direction and removed from the screw hole of the connection nut 34. After this operation is performed for each of the suspension bolts 40, the adjustment plate 42 is removed from the concrete forms 2 and 3 together with the suspension bolts 40. Thereby, the protective tube 4 is attached to the top 43 of the concrete.
6 protrudes, and the upper surface of the flange 34f of the connection nut 34 and the nut 3 are inserted into the inner hole 46a of the protection tube 46.
4 is a state where the screw opening is formed.

Then, if necessary, a top leveling is performed,
The top end is flattened to such an extent that the anchor plate 38 is substantially buried in concrete. In addition, since a part of the protective tube 46 protrudes from the top end 43 of the concrete, fine concrete pieces do not enter the screw opening of the connection nut 34 during this operation.

Then, after the above-described top-end trimming operation is completed, each protective tube 46 is pulled out from the top end 43 with pliers or the like. Since the protection tube 46 is formed of resin and is easily deformed, it can be easily removed from the top end 43.

By performing the above operations, the installation of the anchor bolt is completed.

Next, a description will be given of a method of fixing the frame to the cloth foundation in which the anchor bolts are embedded as described above.

As shown in FIG. 3, the lower frame channel 10 having a U-shaped cross section is temporarily placed on the top end 43 with its opening directed sideways.

Next, bolt mounting holes 10a and 10b formed in the lower frame channel 10 for attaching the lower frame channel 10 to the top end 43 and screw holes of connection nuts 34 provided in the top end 43 are provided. Are aligned on the top end 43 so that the two coincide with each other. Since the connection nuts 34 are fixed to the anchor plate 38 in advance by welding or the like, the screw holes of the connection nuts 34 are embedded at predetermined intervals corresponding to the drilling positions of the bolt insertion holes 10a and 10b of the channel 10. Have been. Accordingly, the bolt insertion holes 52 and 53 and the screw holes of the connection nut 34 can all be exactly aligned by simply shifting the lower frame channel 10 appropriately while being placed on the top end 43. That is, the work of positioning the mounting position of the lower frame channel 10 on the top end 43 can be performed extremely easily.

Further, the collar 56 is connected to each of the bolt insertion holes 10.
Lower frame channel 1 while matching the hole positions of a and 10b
0 each. This operation can be performed with the lower frame channel 10 mounted on the top end 43, and there is no need to mount the lower frame channel 10 on the top end 43 with the collar 56 interposed as in the related art. There is no displacement of the collar 56 after interposition. Therefore, the work of interposing the collar 56 can be performed quickly and reliably as compared with the conventional construction method.

When the work of installing the collar 56 is completed, the work of fixing the lower frame channel 10 to the top end 43 is performed.

The fixing bolt 58 is inserted from above into the bolt insertion hole 10a of the lower frame channel 10, the inner hole 56a of the collar 56,
And the lower frame channel 10
The bolt 58 is screwed into the connection nut 34 until is firmly fixed to the top end 43.

As described above, when the concrete is poured and the top is leveled, the periphery of the flange portion of each connection nut 34 is covered with the protective tube 46.
Concrete does not enter into the screw hole of (1), and the fixing bolt 58 can be easily and reliably screwed into the connection nut 34.

The above operation makes it possible to quickly fix the lower frame channel 10, that is, the formwork, at a predetermined position on the cloth foundation.

As described above, in the embodiment of the present invention,
When assembling the framework of a steel house, a description has been given of the basic concrete and the method of constructing the basic concrete, which can quickly and accurately attach the lower frame channel 10 to the cloth foundation. Needless to say, the present invention can also be applied to a case where a wooden frame for a frame is attached to a vehicle.

In the embodiment of the present invention, the periphery of the flange of each connection nut 34 is covered with the protective tube 46 at the time of pouring concrete and at the time of leveling the top, but concrete enters the screw hole of the connection nut 34. If you do concrete pouring work and top leveling work so that there is no
The flange portion of the nut 34 need not be covered with the protective tube 46.

When the upper screw hole opening of the connection nut 34 is made substantially flush with the top end 43, the anchor plate 38 is opened downward and the plate 38 is lowered instead of being buried in concrete. It may be buried in concrete in an open state.

Further, when supporting the anchor bolt embedding device 30 between the concrete forms, the anchor plate 3
It is not necessary to screw the suspension bolts 40 to all of the plurality of connection nuts 34 fixed to 8 and suspend the adjustment plate 42 via the respective bolts 40, for example, near both ends of the anchor plate 38. The suspension bolts 40 may be screwed into only the connection nuts 34 and fixed to the adjustment plate 42 via these bolts 40 to be supported only at two positions.

Further, instead of screwing the anchor bolt 32 to the connection nut 34, the anchor bolt 32 may be press-fitted or welded.
Alternatively, these may be formed integrally. The anchor bolt itself does not have the J-shape but may be a rod-shaped so-called deformed bolt.

Further, the suspension bolt 40 and the adjustment plate 42
Instead of fixing them with the double nuts 54 and 55, through holes are provided at predetermined intervals on the shaft of the bolt 40, and a pin having an overall length larger than the shaft diameter of the bolt 40 is inserted into one of the through holes. The anchor plate 38 may be hung from the adjustment plate 42 by bridging both ends of the pin around the long hole 42 a of the adjustment plate 42.

[0044]

As described above, the basic concrete according to the present invention comprises a concrete part for supporting a formwork or a wooden frame of a building structure, an anchor plate embedded in the upper end face of the concrete part, and a concrete part. It is characterized by comprising a buried anchor bolt and a fixing nut arranged and fixed at a predetermined interval to the anchor plate, for connecting the anchor bolt with the fixing bolt for fixing the formwork or the wooden frame.

The foundation concrete according to the present invention supports the anchor plate at a predetermined position between the concrete forms with the anchor bolts attached to the connection nuts arranged and fixed at a predetermined interval on the anchor plate,
Pour concrete between molds until it is almost flush with the anchor plate to form a concrete part, leave it to cure until the concrete part hardens, and then screw the fixing bolts to the connection nuts. It is constructed by supporting a formwork or a wooden frame of a building structure.

Preferably, in the foundation concrete according to the present invention, the anchor plate is spanned over the upper end of the concrete formwork, and a suspension bolt attached to the adjustment plate is screwed to the connection bolt to connect the anchor plate to the concrete formwork. It is constructed by supporting it at a predetermined position in between.

Since the upper portions of the anchor bolts do not protrude from the top end of the concrete unlike the conventional foundation concrete, it is not necessary to interpose the collars on the bottom frame channels and then mount the lower frame channels on the top ends, respectively. It becomes easy to place the lower frame channel on the top end.

Further, since the screw holes of the connection nuts are accurately arranged at regular intervals on the top of the concrete, the bolt holes and the connection nuts of the connection nuts can be formed simply by appropriately displacing the lower frame channel while being placed on the top. All screw holes can be matched exactly. As a result, the work of installing the lower frame channel on the top end becomes easier.

As described above, when the foundation concrete and the method for constructing the foundation concrete according to the present invention are implemented, the workability of attaching the lower frame channel to the top end is remarkably improved, and as a result, assembling a framework such as a steel house. Can be performed much faster and more accurately than in the past.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which an anchor bolt embedding device 30 according to an embodiment of the present invention is mounted on concrete forms 2 and 3 and concrete is poured.

FIG. 2 is a perspective view showing an anchor bolt embedding device 30 according to one embodiment of the present invention.

FIG. 3 is an anchor bolt 32 according to an embodiment of the present invention.
It is a figure which shows the method of fixing the lower frame channel 10 to the top end 43 of the concrete which embedded the etc.

FIG. 4 is a sectional view showing a state in which anchor bolts 6 and the like are buried in a concrete top 8 by a conventional construction method and a lower frame channel 10 is fixed to the top 8;

FIG. 5 is a perspective view showing a method of fixing a lower frame channel 10 to a top end 8 of concrete in which anchor bolts 6 and the like are embedded by a conventional construction method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete part 32 Anchor bolt 34 Connection nut 38 Anchor plate 40 Hanging bolt 42 Adjustment plate 46 Protective tube 58 Fixing bolt

Claims (4)

[Claims] 1. A concrete part supporting a formwork or a wooden frame of a building structure, an anchor plate embedded in an upper end face of the concrete part, an anchor bolt embedded in the concrete part, and A foundation concrete, which is arranged and fixed at a predetermined interval, and comprises a fixing bolt for fixing the formwork or the wooden frame and a connection nut for connecting the anchor bolt. 2. An anchor plate is supported at a predetermined position between concrete forms while an anchor bolt is attached to a connection nut arranged and fixed to the anchor plate at a predetermined interval, and concrete is substantially flush with the anchor plate. To form a concrete part by pouring between the formwork until the concrete part hardens, and then screwed a fixing bolt to the connection nut.
A method for constructing basic concrete, comprising supporting a formwork or a wooden frame of a building structure on the concrete portion. 3. An anchor plate is supported at a predetermined position between the concrete forms by spanning an adjusting plate over an upper end of the concrete form and screwing a suspension bolt attached to the adjust plate to the connection bolt. The method for constructing a foundation concrete according to claim 2, characterized in that: 4. An anchor plate in which connection nuts for connecting fixing bolts for fixing a formwork or a wooden frame of a building structure and anchor bolts buried in a concrete part of foundation concrete are arranged and fixed at predetermined intervals. .