JPH048200Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a method for preventing concrete slag from adhering to the base of a group of column reinforcing bars that protrudes from the place where slab concrete is placed during slab concrete placement. This invention relates to a column reinforcing bar protection device.

(Prior art and its problems) Concrete pumped to the slab concrete placement site jumps up and concrete slag adheres to and hardens at the base of the column reinforcing bars that protrude from the slab concrete placement site. There is a fear.
If concrete slag adheres to the reinforcing bars and hardens in this way, the adhesion strength between the column concrete and the reinforcing bars will decrease, so the bases of the column reinforcing bars should be protected to prevent concrete slag from adhering to them. Must.

Conventionally, as a means for preventing concrete slag from adhering to the base of the column reinforcing bars,
A known method is to cover each reinforcing bar with a thin cylindrical bag made of polyethylene film and fix it with adhesive tape or the like. However, this method requires a large number of cylindrical bags to protect one group of column reinforcing bars, which requires a lot of effort. Furthermore, this method cannot be used if hoop muscles are attached around the circumference.

Therefore, such a method is not used at actual sites, and each reinforcing bar is washed with water before the concrete slag hardens, and an appropriate solution has been desired.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention aims to solve the above-mentioned conventional problems by constructing a concrete slab consisting of a plurality of reinforcing bars, rather than individual reinforcing bars protruding from the place where concrete is to be placed. A band-shaped sheet that is wrapped around the outer periphery of the base of the column reinforcing bar group so as to surround the entire outside of the column reinforcing bar group, and a band-shaped sheet fixing clip that is detachably fitted and locked to the reinforcing bars from the outside of the band-shaped sheet. This paper proposes a column reinforcement protection device consisting of:

(Example) An example of the present invention will be described below based on the attached illustrative drawings. One is a slab concrete placement site, and reinforcing bars 2 are arranged in a base pattern on the upper side of the form board. ing. Reference numeral 3 denotes a column reinforcing bar group protruding from the slab concrete placement site 1, which is formed by reinforcing bars 4 located at each corner. Reference numeral 5 denotes a belt-shaped sheet wrapped around the outer periphery of the base of the pillar reinforcement group 3, and a sheet made of vinyl chloride, polyethylene, or the like is used.

Reference numeral 6 denotes a removable elastic clip for fixing the band-shaped sheet 5 to the reinforcing bars 4, and the clip is C-shaped in cross section and is made of plastic or the like and has an inner diameter that is approximately equal to or slightly larger than the outer diameter of the reinforcing bars 4. It is. The structure of the clip 6 is not limited to that shown in the drawings, and, for example, like a clothes clip or an office clip, it has a pair of clamping parts that are biased in the closing direction by a spring, and a clip that opens the clips. When using a clip equipped with a pair of photographing sections, it is easy to attach and detach the clip.

The strip sheet 5 is wrapped around the outer periphery of the base of the column reinforcing bar group 3 so that the slab concrete surface level display line 6 is located at a predetermined level. If it is, wrap it around the entire base of the base as shown in Figure 1, and if it forms a pillar with a wall, wrap it around the three sides protruding from the wall position to form a pillar with a wall at the corner. If it is an object, just wrap it around the two sides that protrude from the wall.

The clip 6 is attached to the column reinforcing bar group 3 as described above.
The sheet 5 is sandwiched between the reinforcing bars 4 and the clips 6 by fitting the reinforcing bars 4 at each corner from the outside of the band-shaped sheet 5 wrapped around the outer periphery of the base of the clip against the elasticity of the clips 6. However, the width of the clip 6 is smaller than the width of the belt-shaped sheet 5.
When the length of is short, as shown in the figure,
It is desirable to fix the upper and lower sides of the bar to the reinforcing bars 4 with clips 6, respectively. In addition, when protecting the entire circumference of the base of the column reinforcing bar group 3 with a band-shaped sheet 5, both ends of the band-shaped sheet 5 are overlapped on one reinforcing bar 4, and the clip 6 is used at this overlapped part. is desirable. Furthermore, when the length of the strip sheet 5 is insufficient, a plurality of strip sheets 5 must be used, but in this case as well, the ends of the two strip sheets 5 to be connected are overlapped with each other, and the overlapping Preferably, the parts are fixed to one reinforcing bar 4 by clips 6.

By wrapping and fixing the band-shaped sheet 5 around the outer periphery of the base of the column reinforcing bar group 3 as described above, the base of each reinforcing bar 4 has a narrow portion facing the center of the reinforcing bar group 3 as shown in FIG. Since the outer circumferential surface of the reinforcing bars is covered with the band-shaped sheet 5 except for the concrete slag 4, the concrete slag that jumps up on the outside of the column reinforcing bars 3 when the concrete is forced into the slab concrete placement location 1 is covered with the reinforcing bars 4. The band-shaped sheet 5 can reliably prevent the adhesive from adhering to the base of the substrate.

In addition, when the belt-shaped sheet 5 is wrapped around the column reinforcing bar group 3 and fixed, the belt-shaped sheet 5 is
Slab concrete 7 on which the lower edge 5a of
By determining the wrapping height of the band-shaped sheet 5 so as to teach the surface level of the concrete slab 7, the surface finishing work of the concrete slab 7 around the pillar can be performed accurately and easily.

Furthermore, in the illustrated example, the belt-shaped sheet 5 is fixed to all of the reinforcing bars 4 at each corner with the clips 6, but the belt-shaped sheet 5 may also be fixed with the clips 6 only to a specific reinforcing bar 4 that has been properly washed. good.
Furthermore, in the column reinforcing bar group 3, there are reinforcing bars 4 at each corner.
In addition, reinforcing bars are usually provided at intermediate positions on each side, so the belt-like sheet 5 can also be fixed with clips 6 to the reinforcing bars at intermediate positions on each side.

When concrete slab 7 has been poured,
Or, when curing of the poured concrete slab 7 is completed, the clip 6 is held against the elasticity of the reinforcing bar 4.
By removing it from the clip 6, the clip 6 and the removed strip sheet 5 can be reused.

(Operations and Effects of the Invention) As described above, according to the column reinforcing bar protection device according to the present invention, when concrete is force-placed at the slab concrete placement site, the concrete slag that jumps up can cause damage to the column reinforcing bars. The band-like sheet can effectively prevent the steel from adhering to the base of each reinforcing bar.

Moreover, compared to the conventional work in which a large number of reinforcing bars that make up a column reinforcing bar group must be individually covered with a long bag made of polyethylene film, etc., the number of reinforcing bars belonging to one column reinforcing bar group and the number of hoops Regardless of the presence or absence of reinforcement, simply wrap a band-shaped sheet around the base of the entire group of reinforcing bars, and then fit and lock the clips from the outside of this band-shaped sheet to the inner reinforcing bars, making the work simple and efficient. can be done.

Furthermore, by removing the clip, the clip and the band-like sheet can be used repeatedly, which is also economical.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing how the device of the present invention is used;
FIG. 2 is a vertical sectional side view of the concrete slab after pouring concrete, and FIG. 3 is an enlarged cross-sectional plan view of the main part of FIG. 1. 1... Slab concrete placement location, 2, 4...
...Reinforcing bars, 3... Reinforcing bars for columns, 5... Band-shaped sheets,
6...Clip, 7...Slab concrete.

Claims (1)

[Scope of utility model registration request] A band-shaped sheet that is wrapped around the base of a group of column reinforcing bars so as to surround the outside of the entire group of column reinforcing bars made up of the plurality of reinforcing bars, instead of each of the individual reinforcing bars protruding from the place where the slab concrete is placed;
A column reinforcing bar protection device comprising a band-shaped sheet fixing clip that is detachably fitted onto and locked to the reinforcing bars from the outside of the band-shaped sheet.