JPH048201Y2 - - 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 belt-shaped sheet that is wrapped around the outer periphery of the base of the column reinforcement group so as to surround the entire outer side of the column reinforcement group, and a belt-shaped sheet fixing clip that is detachably fitted and locked to the reinforcing bars from the outside of the belt-shaped sheet. The present invention proposes a column reinforcing bar protection device in which a slab concrete surface level indicating line is displayed on the surface of the band-shaped sheet near the lower edge thereof in the longitudinal direction of the sheet.

(Example) An example of the present invention will be described below based on the attached illustrative drawings. 1 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 base of the column reinforcing bar group 3, which is made of vinyl chloride, polyethylene, or the like.
As shown in Fig. 3, a slab concrete surface level indicator line 6 is placed at an appropriate distance above the lower edge 5a.
is displayed by printing or other methods along the length of the sheet.

Reference numeral 7 denotes a removable elastic clip for fixing the belt-shaped sheet 5 to the reinforcing bars 4, and the clip has a C-shaped cross section and is made of plastic stick 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 7 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 biased in the closing direction by a spring, and a clip part for opening the clip. 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 7 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 7 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 7. However, the width of the clip 7 is smaller than the width of the strip 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 frame to the reinforcing bars 4 with clips 7, respectively. In addition, when protecting the entire circumference of the base of the column reinforcing bar group 3 with the band-shaped sheet 5, both ends of the band-shaped sheet 5 are overlapped on one reinforcing bar 4, and the clips 7 are used in this overlapping 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 7.

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.

Moreover, as shown in FIG. 2, when finishing the surface of the poured concrete slab 8, the surface of the concrete slab 8 should be aligned with the slab concrete surface level display line 6 displayed on the surface of the strip sheet 5. By performing the finishing work on the concrete slab 8 around the pillar, the surface finishing work on the concrete slab 8 around the pillar can be performed accurately and easily.

In the illustrated example, the strip sheet 5 is fixed to all of the reinforcing bars 4 at each corner with the clips 7, but the strip sheet 5 may also be fixed with the clips 7 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 7 to the reinforcing bars at intermediate positions on each side.

When concrete slab 8 is finished being poured,
Or, when curing of the poured concrete slab 8 is completed, the clip 7 is held against the elasticity of the reinforcing bar 4.
By removing it from the clip 7, the clip 7 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, regardless of the number of reinforcing bars belonging to one column reinforcing bar group or the presence or absence of hoop reinforcement, a strip sheet is wrapped around the base of the entire reinforcing bar group so that the slab concrete surface level indicator line is at a predetermined level. The objective of protecting the reinforcing steel can be achieved by the extremely simple installation process of simply attaching the clips to the reinforcing bars on the inside from the outside of the strip sheet, and finishing the surface of the slab concrete around the columns. This can be done easily and accurately using the concrete surface level indicator line.
Furthermore, by removing the clip, the clip or the belt-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 it has been poured, FIG. 3 is a developed front view of the sheet used, and FIG. 4 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...Slab concrete surface level display line, 7
...Clip, 8...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;
and a belt-shaped sheet fixing clip that removably fits and locks onto the reinforcing bars from the outside of the belt-shaped sheet, and on the surface of the belt-shaped sheet, there is a slab along the length direction of the sheet at a position near the lower edge of the belt-shaped sheet. Reinforcement protection device for columns that displays concrete surface level indicator lines.