JP2004285607A - Method and auxiliary implement for leveling of concrete, and spacer for reinforcement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an auxiliary implement for leveling of concrete, which enable easy and accurate leveling, and a spacer for reinforcement. <P>SOLUTION: An adjusting screw body 9, which is attached to a jig 1 which is mounted on the reinforcement 6 so as to be almost vertical, is adjusted so that a head of the adjusting screw body can be in a prescribed position. After that, the concrete is filled into a placing space, which is formed by using a form, up to the position of the head of the adjusting screw body, which is adjusted to the prescribed position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for setting a horizontal surface of concrete, an auxiliary tool for setting a horizontal surface, and a spacer for reinforcing bars. More specifically, the present invention relates to a method for setting a horizontal surface of concrete for adjusting the position using an adjusting screw body, a horizontal surface setting auxiliary tool, and a spacer.
[0002]
[Prior art]
At present, the foundations used in the conventional frame construction method and two-by-four housing (framed wall construction method) are roughly classified into cloth foundation and solid foundation.
Here, as shown in FIG. 11, the cloth foundation has a cross section having a base portion 103 and a rising portion 104 on an upper part of a discarded concrete layer 102 formed by covering a moisture-proof sheet 115 laid on a chestnut stone 101. A substantially inverted T-shaped reinforced concrete cloth foundation 105 is constructed, and a base 106 is disposed on the upper part of the cloth foundation.
On the other hand, as shown in FIG. 12, a solid foundation is made of reinforced concrete having a base part and a rising part on the upper part of a discarded concrete layer formed by cutting a root and covering with a moisture-proof sheet laid on chestnut stone. The foundation 107 is constructed, and the base is placed on top of this solid foundation, as in the case of the cloth foundation described above.
[0003]
Here, the lower half of the foundation is generally embedded in the ground, and an anchor bolt 108 is embedded in a rising portion of the foundation such that an upper end portion 109 protrudes from the top surface of the rising portion.
Also, a large number of anchor bolts are arranged in a row at predetermined intervals in the longitudinal direction of the foundation, and after the foundation is constructed, the upper end of the anchor bolt is inserted into a hole 110 formed in the foundation, so that the foundation is It is placed on top of the foundation and fastened with nuts. In addition, the code | symbol 111 in FIG.11 and FIG.12 has shown the joist, and the code | symbol 112 has shown the floorboard.
[0004]
Now, the above-mentioned base is constructed through the steps shown in FIG.
That is, first, as shown in FIG. 13A, a reinforcing base is formed between the formwork (1) 113 assembled on the discarded concrete layer and concrete is cast to form a base portion of the foundation. I do. When the base portion is formed, the reinforcing-bar spacers are arranged below the reinforcing bars arranged in parallel at a predetermined pitch in order to secure the covering thickness of the reinforcing bars.
[0005]
Subsequently, the mold (1) is removed, and as shown in FIG. 13 (b), reinforcing bars are arranged between the molds (2) 114 assembled on the base portion, and anchor bolts are embedded in the rising portions. The rising part of the foundation is formed by placing concrete in the inserted state. In addition, when concrete is poured in consideration of the construction of the leveler described below, concrete is not poured to the upper end level of the rising portion of the foundation.
[0006]
Next, in order to flatten the upper end of the rising part of the foundation and to keep the base placed on top of the foundation horizontal, it is a concrete with a high cement ratio that has been softened until it is almost liquid after hardening of the concrete. Install a leveler. Thereafter, the mold (2) is removed, and the foundation is constructed as shown in FIG.
[0007]
Here, the level adjustment of the horizontal surface in the base portion is performed by attaching a tape 116 to a reinforcing bar 115 extending in the vertical direction as shown in FIG. As described above, a method of fixing a long level bar 117 to a reinforcing bar extending in the vertical direction with a wire or the like and using this as a mark of a horizontal level has been adopted, but it takes time and effort to set a tape or a level bar. As a result, there is a problem that it is difficult to perform accurate level setting.
[0008]
In order to solve such a problem, conventionally, as shown in FIG. 15, a main body 120 provided with a sharp distal end 118 at its distal end and a screw 119 at its upper end, and a level surface are recognized and adjusted. A level adjuster including a possible level display plate 121 has been proposed (for example, see Patent Document 1).
[0009]
[Patent Document 1]
Registered Utility Model No. 3077663 (Page 1-2, FIG. 6)
[0010]
[Problems to be solved by the invention]
However, in the above-described level adjuster, it is necessary to penetrate the end portion through the moisture-proof sheet and drive it into the stone to fix the level adjuster, and the moisture-proof function is reduced by the hole of the moisture-proof sheet formed by the level adjuster. There was a risk of doing it.
[0011]
The present invention has been made in view of the above points, and it is an object of the present invention to provide a horizontal surface setting method, a horizontal surface setting auxiliary tool, and a reinforcing bar spacer capable of performing easy and accurate leveling. It is the purpose.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the method for setting a horizontal surface of concrete according to the present invention, a step of attaching an adjusting screw body to a reinforcing-bar spacer supporting a reinforcing bar at a predetermined interval from a reference surface so as to be substantially vertical. Adjusting the head of the adjusting screw body attached to the reinforcing bar spacer to a predetermined position; and adjusting the head of the adjusting screw body adjusted to the predetermined position in the casting space formed by the mold. Filling the concrete to the position of the part.
[0013]
In addition, the method for setting a horizontal surface of concrete according to the present invention includes a step of attaching the adjusting screw body to a jig attached to a reinforcing-bar spacer supporting a reinforcing bar at a predetermined interval from a reference plane so as to be substantially vertical, Adjusting the head of the adjusting screw body attached to the jig to be at a predetermined position; and adjusting the head of the adjusting screw body adjusted to a predetermined position in the casting space formed by the mold. Filling with concrete.
[0014]
Further, the method for setting a horizontal surface of concrete according to the present invention includes a step of attaching the adjusting screw body to a jig attached to a reinforcing bar supported at a predetermined distance from a reference plane by a reinforcing bar spacer so as to be substantially vertical. Adjusting the head of the adjusting screw body attached to the jig to a predetermined position; and adjusting the position of the head of the adjusting screw body adjusted to the predetermined position in the casting space formed by the mold. And filling the concrete.
[0015]
Further, in order to achieve the above object, a concrete horizontal surface assisting tool according to the present invention is provided with an engaging portion and an adjusting screw body for engaging a reinforcing-bar spacer supporting a reinforcing bar at a predetermined interval from a reference plane. And an adjusting screw body supporting portion that supports the adjusting screw body so as to be substantially vertical, wherein the adjusting screw body supporting portion includes a receiving screw hole into which the adjusting screw body is screwed so as to be able to advance and retreat. .
[0016]
In addition, the concrete horizontal surface assisting device according to the present invention is an adjustment device that supports a gripping portion that grips a reinforcing bar supported at a predetermined distance from a reference surface by a reinforcing bar spacer and an adjusting screw body so as to be substantially vertical. A horizontal plane setting assisting tool having a screw body support portion, wherein the adjustment screw body support portion includes a receiving screw hole into which the adjustment screw body is screwed so as to be able to advance and retreat.
[0017]
Further, in order to achieve the above object, a reinforcing bar spacer according to the present invention supports an adjusting screw body to be substantially vertical in a reinforcing bar spacer supporting a reinforcing bar at a predetermined interval from a reference plane. At the same time, a receiving screw hole is formed for screwing the adjusting screw body in such a manner that it can advance and retreat.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.
[0019]
FIG. 1 shows a perspective view for explaining an example of a concrete horizontal surface assisting device (hereinafter referred to as an assisting device) to which the present invention is applied. The concrete horizontal surface assisting device (hereinafter referred to as an assisting device) 1 is made of a plastic material having a certain elasticity, and includes a reinforcing bar gripping portion 2, an adjusting screw support portion 3, and a receiving portion 4.
[0020]
Here, the reinforcing bar gripping portion for gripping the reinforcing bar has a cylindrical shape having an opening 5, and the inner surface of the reinforcing bar gripping portion facing the reinforcing bar when embedded in concrete as shown in FIG. 2. A protrusion 8 is formed to engage with a rib 7 formed on the reinforcing bar 6 in order to increase the surface to be adhered to concrete and increase the pull-out strength.
In addition, the width of the opening indicated by reference numeral a in FIG. 1 is formed smaller than the diameter of the reinforcing bar.
[0021]
The adjusting screw body support portion is formed with a receiving screw hole 10 into which the adjusting screw member 9 as shown in FIG. 3 is substantially vertical and which can be screwed forward and backward, and the receiving portion is formed by a rebar gripping portion. It is formed so as to come into contact with a reinforcing bar (2) arranged substantially perpendicular to the reinforcing bar (1) to be gripped.
[0022]
Here, the rebar gripping portion is sufficient if it can grip the rebar, and need not necessarily be cylindrical, and may have any shape as long as it can grip the rebar. For example, a parallel shape as shown in FIG. And a flat base portion 11 having both side edges, and flat side wall portions 12 erected from both side edges of the base portion, respectively, and parallel side edges as shown in FIG. 4B. The shape may be such that a “U” -shaped side wall portion is formed on a flat base portion from both side edges of the base portion.
4A, the reinforcing bar gripping portion having the flat side walls formed upright from both side edges of the base portion is formed such that the width of the opening is smaller than the diameter of the reinforcing bar by the convex portion 13. I have.
[0023]
In addition, the protrusion formed on the inner surface of the reinforcing bar grip is for strengthening the engagement between the reinforcing bar and the reinforcing bar grip, and is not necessarily essential for gripping the reinforcing bar. It is preferable that the projection is formed so as to enable firm grip.
Further, the reason why the width of the opening is formed smaller than the diameter of the reinforcing bar is to strengthen the engagement between the reinforcing bar and the reinforcing bar gripping portion. It is not necessary to form the opening smaller than the diameter of the reinforcing bar, but it is preferable that the width of the opening is smaller than the diameter of the reinforcing bar so as to enable firm holding of the reinforcing bar.
[0024]
Further, in an example of the concrete horizontal plane assisting tool to which the present invention is applied, the adjusting screw body support portion having the receiving screw hole is provided separately from the receiving portion. As long as the screw is substantially vertical and can be screwed forward and backward, the adjusting screw support portion and the receiving portion do not necessarily need to be provided as separate members, and the receiving portion is received in the receiving portion as shown in FIG. A configuration in which a screw hole is provided may be used.
[0025]
Further, since the receiving portion is formed to restrict the vertical movement of the assisting tool by contacting the reinforcing bar (2), the assisting tool is used when adjusting the height of the head of the adjusting screw body. When the engagement between the reinforcing bar and the reinforcing bar gripping portion is strong enough not to move in the vertical direction, the receiving portion does not necessarily need to be formed, but in order to further restrict the vertical movement of the auxiliary tool. It is preferable that the receiving portion is formed.
As shown in FIG. 6, when a reinforcing bar gripping portion for gripping the reinforcing bar (1) and the reinforcing bar (2) arranged substantially orthogonal to each other is formed, the reinforcing bar gripping portion allows the auxiliary tool to move in the vertical direction. A receiving part does not need to be formed in order to be able to regulate the movement.
[0026]
Now, a method of leveling the base portion of the foundation using the auxiliary tool configured as described above will be described. That is, an example of a method for setting a horizontal surface of concrete to which the present invention is applied will be described.
In an example of a method for finding a horizontal surface of concrete to which the present invention is applied, first, as shown in FIG. 7A, reinforcing bars (1) are juxtaposed at a predetermined pitch so that a receiving portion intersects a reinforcing bar (1) substantially vertically. The auxiliary tool is attached to the reinforcing bar (1) by gripping the reinforcing bars (1) arranged side by side at a predetermined pitch by the reinforcing bar gripping part in the state of contacting the reinforcing bar (2).
[0027]
Subsequently, as shown in FIG. 7B, the adjusting screw body is screwed into the receiving screw hole, and adjustment is performed so that the head of the adjusting screw body is positioned at a predetermined level. The base part of the foundation is formed by driving concrete to the indicated level with the head of the adjusting screw as a guide.
[0028]
In the concrete horizontal surface assisting device to which the present invention is applied, the concrete is easily cast by using the head of the adjusting screw body which is screwed into the receiving screw hole and whose head is adjusted to a predetermined level as a guide. In addition, the horizontal surface of the base portion of the foundation can be accurately set.
[0029]
In addition, since the receiving portion is in contact with the reinforcing bar (2), that is, the vertical movement of the auxiliary tool is restricted, the height of the head of the adjusting screw body screwed into the receiving screw hole is adjusted. Can be easily performed. That is, when adjusting the height of the head of the adjusting screw body, a force is applied in the vertical direction to move the adjusting screw body in the vertical direction, but the vertical movement of the auxiliary tool is restricted. Even when a force is applied in the vertical direction when adjusting the height of the head of the adjusting screw body, the height adjustment can be easily performed without rotating the auxiliary tool.
[0030]
Furthermore, in the concrete horizontal surface assisting device to which the present invention is applied, since the holes are not formed in the moisture-proof sheet when the auxiliary device is fixed, the moisture-proof function does not decrease.
[0031]
In the above-described method for setting a horizontal surface of concrete to which the present invention is applied, an auxiliary screw is attached to a reinforcing bar (1) arranged side by side at a predetermined pitch, the adjusting screw is attached to the reinforcing bar (1), and screwed into a receiving screw hole. Although the height of the body is adjusted, it is only necessary that the adjusting screw body can be screwed so that the height of the head can be adjusted, and it is not necessary to use an auxiliary tool attached to the reinforcing bar (1). There is no need to screw them together. For example, as shown in FIGS. 8 (a) and 9 (a), they are made of a plastic material having a certain elasticity, As shown in FIG. 8 (b) and FIG. 9 (b), an auxiliary tool comprising an adjusting screw body support portion having a receiving screw hole formed to be substantially vertical and capable of screwing forward and backward can be used. Reinforcing bar placed under the reinforcing bar to secure the covering thickness It may be threadedly engaged an adjusting screw body mounted aid to p o 15.
Further, as shown in FIG. 10 (b), using a reinforcing bar spacer in which the adjusting screw body as shown in FIG. 10 (a) is substantially vertical and in which a receiving screw hole is screwed so as to be able to advance and retreat. As described above, the adjusting screw may be screwed into the reinforcing bar spacer.
[0032]
【The invention's effect】
As described above, the horizontal leveling method for concrete, the horizontal leveling assisting device, and the reinforcing bar spacer of the present invention can easily and accurately perform leveling.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating an example of a concrete horizontal surface assisting tool to which the present invention is applied.
FIG. 2 is a perspective view for explaining a reinforcing bar.
FIG. 3 is a perspective view for explaining an adjusting screw body.
FIG. 4 is a perspective view for explaining a modified example of the rebar gripping portion.
FIG. 5 is a perspective view for explaining a modified example of an example of a concrete horizontal surface assisting tool.
FIG. 6 is a perspective view for explaining another modification of the concrete horizontal surface assisting device.
FIG. 7 is a view for explaining a method for setting a horizontal surface of concrete to which the present invention is applied.
FIG. 8 is a view for explaining a modification of an example of a method for setting a horizontal surface of concrete.
FIG. 9 is a diagram for explaining another modified example of the example of the method for setting a horizontal surface of concrete.
FIG. 10 is a view for explaining still another modified example of the example of the method for setting a horizontal surface of concrete.
FIG. 11 is a schematic sectional view of a foundation (cloth foundation).
FIG. 12 is a schematic sectional view of a foundation (solid foundation).
FIG. 13 is a schematic cross-sectional view for explaining a method of constructing a foundation.
FIG. 14 is a diagram for explaining level adjustment of a horizontal plane in a base portion.
FIG. 15 is a view for explaining a conventional level adjuster.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Auxiliary tool for concrete horizontal plane 2 Rebar gripping part 3 Adjustment screw support 4 Receptor 5 Opening 6 Reinforcing bar 7 Rib 8 Projection 9 Adjustment screw 10 Receiving screw hole 11 Base 12 Side wall 13 Convex 14 Engagement 15 Spacer for reinforcing bars

Claims (10)

Attaching the adjusting screw body to a reinforcing-bar spacer supporting the reinforcing bar at a predetermined interval from the reference plane so as to be substantially vertical;
Adjusting the head of the adjusting screw body attached to the reinforcing bar spacer to be at a predetermined position;
Filling concrete up to the position of the head of the adjusting screw body adjusted to a predetermined position in the casting space formed by the formwork. Attaching the adjusting screw body to a jig attached to a reinforcing-bar spacer supporting the reinforcing bar at a predetermined interval from a reference plane so as to be substantially vertical;
Adjusting the head of the adjustment screw body attached to the jig to be at a predetermined position;
Filling concrete up to the position of the head of the adjusting screw body adjusted to a predetermined position in the casting space formed by the formwork. Attaching the adjusting screw body to a jig attached to a reinforcing bar supported at a predetermined distance from a reference plane by a reinforcing bar spacer so as to be substantially vertical;
Adjusting the head of the adjustment screw body attached to the jig to be at a predetermined position;
Filling concrete up to the position of the head of the adjusting screw body adjusted to a predetermined position in the casting space formed by the formwork. 4. The method of claim 2, wherein the jig is restricted from moving in a vertical direction. 5. A horizontal plane assisting tool having an engaging portion for engaging with a reinforcing bar spacer supporting a reinforcing bar at a predetermined distance from a reference surface and an adjusting screw support portion for supporting the adjusting screw substantially vertically. hand,
A horizontal plane setting assisting tool, wherein the adjusting screw body support portion includes a receiving screw hole into which the adjusting screw body is screwed so as to be able to advance and retreat. The horizontal plane setting assisting tool according to claim 5, wherein the vertical movement is regulated by the reinforcing bar spacer. A horizontal plane setting assisting tool having a grip portion for gripping a reinforcing bar supported at a predetermined distance from a reference plane by a reinforcing bar spacer and an adjusting screw body supporting portion for supporting the adjusting screw body so as to be substantially vertical. ,
A horizontal plane setting assisting tool, wherein the adjusting screw body support portion includes a receiving screw hole into which the adjusting screw body is screwed so as to be able to advance and retreat. The horizontal surface according to claim 7, wherein a receiving portion is formed on both sides of the gripping portion, the receiving portion being in contact with a second reinforcing bar arranged so as to be substantially orthogonal to the first reinforcing bar gripped by the gripping portion. Outing aid. The horizontal surface setting assisting tool according to claim 7, wherein the gripping portion grips a first reinforcing bar and a second reinforcing bar arranged so as to be substantially orthogonal to each other. In a reinforcing bar spacer that supports a reinforcing bar at a predetermined distance from a reference plane,
A reinforcing-bar spacer, wherein the adjusting screw body is supported so as to be substantially vertical, and a receiving screw hole is formed for screwing the adjusting screw body so that the adjusting screw body can advance and retreat.

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