JPH035546A - Spacer for anchor bar - Google Patents

Abstract

PURPOSE:To improve position precision of an anchoring bar and to facilitate a work to drive a panel by a method wherein a spacer to which a plurality of radially extended wire rods are mounted is used for a cylinder member engaged with the outer periphery of the tip of the anchor bar. CONSTITUTION:A plurality of wire rode 3 extending radially from a cylinder member are mounted to a cylinder member 2 engaged with the outer periphery of the tip of an anchor bar 4 to form a spacer 1 for an anchor bar. The spacer 1 is mounted to the tip of the anchor bar 4 risen from a foundation 11, and a panel 5 by which a cavity part 6 is positioned to the anchor bar 4 is driven from above. In this case, the wire rod 3 of the spacer 1 performs a role of a guide in the space 6, and the anchor bar 4 is positioned properly on the axis of the cavity part 6. The cavity part 6 is filled with a grout material, e.g. mortar, and the panel 5 is anchored in the foundation 11 through the anchor bar 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spacer for anchor bars used in the construction of precast concrete panels constituting walls of buildings.

[Conventional technology]

Precast concrete panels (hereinafter simply referred to as panels) are used as wall panels in houses or medium- and low-rise buildings.
Conventional construction methods when using a conventional construction method include those shown in FIGS. 6 and 7. In this example, a perforated panel 5 with a cavity 6 formed in the longitudinal direction is lifted with a wire rope or the like, and anchor bars 4 are fixed in the foundation ll.
The panel 5 is erected so that it enters the cavity 6, and the cavity 6 is filled with grout material such as mortar.

In the example shown in FIG. 6, the steel frame structure 12 is in the column direction, and the wall structure in which panels 5 are arranged in parallel is in the span direction, and 13 in the figure is a temporary beam used during construction.

[Problem to be solved by the invention]

Anchor bars are embedded in advance so as to coincide with one part of the panel, but when multiple anchor bars are simultaneously inserted into corresponding panel cavities, it is difficult to align them. Furthermore, if the anchor bars are deformed or misaligned, there is a risk that it will not be possible to ensure a sufficient covering thickness of the grout material that is later filled into the cavity.

The present invention is aimed at solving the above-mentioned problems.

[Means to solve the problem]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The anchor muscle spacer of the present invention will be described below using reference numerals in the drawings that correspond to embodiments.

An anchor muscle spacer 1 of the present invention includes a cylindrical member 2 that fits around the outer periphery of the tip of an anchor muscle 4, and a plurality of cotton materials 3 that extend radially from the cylindrical member 2.

The cylindrical member 2 is made of a steel pipe or the like having a larger diameter than the outer diameter of the anchor reinforcement 4, and a wire rod 3 made of a reinforcing bar or a large diameter wire is attached by welding or the like.

During construction, anchor bars 4 rising from the foundation 11 etc.
The spacer 1 of the present invention is attached to the tip of the panel 5, and the panel 5 is erected from above, with the cavity 6 aligned with the anchor bar 4, as in the conventional case.

At this time, the wire 3 of the spacer 1 serves as a guide within the cavity 6, and the panel 5 can be erected with the anchor bars 4 positioned on the axis of the cavity 6. Thereafter, the cavity 6 is filled with a grouting material such as mortar, and the panel 5 is fixed to a foundation 11 or the like via the anchor bars 4. Further, since the spacer l holds the anchor thread 4 at the center of the cavity 6, a sufficient cover thickness can be ensured when filling with grout material, and a reliable anchoring structure can be obtained.

〔Example〕

Next, the illustrated embodiment will be described.

FIG. 1 shows how a spacer is used in an embodiment of the present invention, in which a spacer is placed in a hollow part of a panel 5 constituting a wall.
The anchor reinforcement 4 rising from the foundation 11 is inserted with the spacer 1 of the present invention attached to its tip. FIG. 2 shows an example of the positional relationship between the hollow part 6 of the panel 5 and the anchor reinforcement 4.
The anchor muscle 4 is inserted into the hollow part 6 of the anchor. In the figure,
7 is a reinforcing steel bar for the panel 5.

The spacer 1 in this embodiment is made by fixing a thin reinforcing bar as a wire rod 3 in a cross shape to one end of a cylindrical body 2 in the shape of a cut steel pipe, and as shown in FIGS. The anchor muscle 4 is held at the center of the cavity 6 inside. Note that the tip of the wire 3 is bent downward,
This is done so that it does not interfere with insertion. Further, in the spacer 1 of this embodiment, since the cotton material 3 crosses the upper end of the cylindrical body 2, the wire material 3 also serves as a stopper/par for the anchor wire 4.

To give an example of dimensions, panel 5 with a thickness of 1201 mm has a third
In the case where a cavity 6 with a diameter of 50 mra is provided as shown in the figure, the diameter of the anchor muscle 4 is 16 mm, and the spacer 1 is
The inner diameter of the cylindrical body 2 is approximately 16 mm, the length is 15 mm, and the wire rod 3
A diameter of about 2 mm can be used. Note that the above is just an example, and the invention is not limited to this.

4 and 5 show another embodiment of the spacer 1, in which a downward U-shaped wire 3 is welded to the outer peripheral surface of a cylindrical body 2. Although it is functionally almost the same as the embodiment described above, the tip of the anchor bar 4 and the wire 3 do not come into contact with each other.

〔Effect of the invention〕

By using the spacer of the present invention, the positional accuracy of the anchor bars in the cavity of the panel can be easily achieved, and the workability of panel erection can be improved.

Furthermore, the radially extending wire rods make it possible to ensure a predetermined covering thickness of the grout material, and since a filling space can be provided all around, a predetermined adhesion strength can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing how a spacer is used in an embodiment of the present invention, FIG. 2 is a horizontal sectional view showing the relationship between the panel cavity and the spacer in the embodiment of FIG. 1, and FIG. FIG. 4 is a perspective view showing how the spacer is used in another embodiment, FIG. 5 is a perspective view of the spacer in the embodiment shown in FIG. 4, and FIG. 6 is a conventional example. FIG. 7 is a perspective view showing how the panel is erected, and FIG. 7 is a perspective view showing how anchor bars are inserted into the cavity of the panel. 1... Spacer 2... Cylindrical member, 3... Wire rod, 4... Anchor bar, 5... Panel, 1... Foundation, 6... Cavity part, Fig.

Claims (1)

[Claims] (1) An anchor bar spacer used in a concrete panel having a hollow part for inserting the anchor bar in the longitudinal direction, which has a diameter larger than the outer diameter of the anchor bar and fits into the outer periphery of the tip of the anchor bar. A spacer for an anchor reinforcement, comprising a cylindrical member and a plurality of wire rods extending radially from the cylindrical member within a cavity of the concrete panel.