JP2000356006A - Spacer for reinforced concrete construction work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer for synthetic resin-made reinforced concrete construction work capable of certainly holding two pairs of upper and lower reinforcements by one piece of the spacer and not causing nonconformity of falling, etc., with stability. SOLUTION: It is structured so that a U shaped U shaped reinforcement receiver 8 toward a front surface 5 from a upper part center 25 of a rising side surface 2 of a polygonal formwork 1 is provided along overall width of a spacer 16 in parallel with a bottom surface 7, a semi-circular semi-circular arc reinforcement receiver 10 making contact with an upper surface 9 of the U shaped reinforcement receiver 8 is provided along overall depth of the spacer 16 toward a back surface 6 from the front surface 5 in parallel with the bottom surface 7, a fall-stop preventive plate 12 toward a semi-circular arc reinforcement receiver center with an upper part 26 of a rising back side surface 4 as its fulcrum is provided along overall depth of the spacer 16, a plural number of semi-circular projections 13a, 13b, 13c in parallel with the semi-circular arc reinforcement receiver 10 are provided on the bottom surface 7 and a pair of reinforcement receiver projections 15a, 15b is provided on a top panel 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for holding and supporting two pairs of upper and lower rebars in reinforced concrete work.

[0002]

2. Description of the Related Art In reinforced concrete, concrete is poured after a reinforcing bar is assembled on a base, a plate-like frame is assembled. At this time, it is necessary to support the rebar at a predetermined height from the base. Various types of spacers are used as supports for the upper and lower two pairs of reinforcing bars.

[0003]

The conventional upper and lower two-piece reinforced concrete construction spacer has a disadvantage that when holding and supporting the reinforcing bar, the spacer is not stable because of the poor stability of the spacer and cannot be held at a predetermined height.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate such a drawback, and has a U-shaped U-shaped rebar receiving member extending from the upper center 25 of the rising side surface 2 of the polygonal frame 1 to the front surface 5. 8 is provided parallel to the bottom surface 7 and over the entire radiant B1 of the spacer 16, and a semicircular semi-arc reinforcing bar receiver 10 in contact with the upper surface 9 of the U-shaped reinforcing bar receiver 8 is parallel to the bottom surface 7 from the front 5 to the rear front 6. 16 is provided over the entire depth D1 and the upper part 26 of the rising back side surface 4 is used as a fulcrum,
A retaining plate 12 is provided over the entire depth D1 of the spacer 16 toward the center 18 of the semicircular reinforcing bar support.
A synthetic resin reinforced concrete construction spacer characterized in that a plurality of a, 13b, 13c are provided, and a pair of reinforcing bar receiving ridges 15a, 15b are provided on the top surface 14.

[0005]

[Function] One pair of spacers can securely hold two pairs of upper and lower rebars, and there is no problem of falling down because of the stability.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. 1, 2, 3, and 4 show the spacer 16 of the present invention.
The spacer 16 made of a synthetic resin includes a rising side surface 2, a rising rear side surface 4, a rising upper surface 3, a top surface 14,
It is formed of a polygonal frame 1 having a bottom surface 7, a front surface 5, and a back front surface 6. The rising side 2 and the rising back side 4 are parallel,
The top surface 14 and the bottom surface 7 are also parallel, and the front 5 and the back front 6 are also in a parallel relationship. The positional relationship between the rising side surface 2 and the rising rear side surface 4, the top surface 14 and the bottom surface 7, and the front surface 5 and the back front surface 6 are formed vertically.

The upper center 25 of the rising side surface 2 of the polygonal frame 1
A U-shaped reinforcing bar receiver 8 having a U-shape toward the front surface 5 is provided parallel to the bottom surface 7 and over the entire width B1 of the spacer 16.

A semicircular semicircular reinforcing bar receiver 10 which is in contact with the upper surface 9 of the U-shaped reinforcing bar receiver 8 is provided parallel to the bottom surface 7 from the front 5 to the rear front 6 over the entire depth D1 of the spacer 16.

The rising back surface 4 is formed so as to form a space between the upper surface 9 of the U-shaped reinforcing bar receiver 8 and the upper portion 26 of the rising back surface 4.
With the upper part 26 of the spacer serving as a fulcrum, the retaining plate 12 facing the center 18 of the semicircular rebar receiving member is positioned at the depth D1 of the spacer 16.
Provided all over.

The tip 27 of the retaining plate 12 is formed so as to be in contact with the circumference of the semicircular reinforcing bar receiver 10, and a gap S is formed between the semicircular reinforcing bar receiver 10 and the distal end 27 of the retaining plate 12. I keep it. The thickness t1 of the tip end portion 27 of the retaining plate 12 is larger than the thickness t2 of the retaining plate 12.

A plurality of semicircular ridges 13a, 13b, 13c parallel to the semicircular reinforcing bar receiver 10 are provided on the bottom surface 7.

The top surface 14 is provided with a pair of rectangular reinforcing bar receiving ridges 15a and 15b parallel to the semi-arc reinforcing bar receiver 10 while maintaining the width B2 with the semi-circular reinforcing bar receiving center 18 being distributed.

The spacer 16 is used to reduce the weight.
Stealing 19a, 1 inward from the front 5 and the back 6
9b, 19c, 19d, 19e, 19f, 19g, 19
h. When concrete is poured into the spacer 16, the partition plates 28a, 28b, 28c, 28d, and 28e are provided with through holes 20a, 20b, 20c, 20d, and 20e so that the concrete is completely filled.

The reinforcing bars 21a, 21b,
FIGS. 5 and 6 show the state where 21c and 21d are inserted. The rebar 21a can be inserted into the U-shaped rebar receiver 8 without resistance.
The inner diameter d5 of the U-shaped reinforcing bar receiver 8 is formed to be slightly larger than the outer shape d1 of the reinforcing bar 21a. Inner diameter d6 of semicircular reinforcing bar receiver 10
Is formed substantially identical to the outer shape d2 of the reinforcing bar 21b. Reinforcing bar receiving ridges 15a, 15b where reinforcing bar 21c is inserted
Is formed several mm larger than the outer shape d3 of the reinforcing bar 21c.

By forming a height H1 from the tip of the ridge 13a on the bottom surface 7 to the lower surface 29 of the U-shaped reinforcing bar receiver 8 and a height H2 from the top surface 14, the reinforcing bars 21a, 21b, 2
When 1c and 21d are inserted into the spacer 16,
1a can completely hold the height H1 from the base 22, and the reinforcing bar 21c can completely hold the height H2 from the base 22.

A second embodiment will be described with reference to FIGS. U
Retaining plate 1 located just above 23 of rebar holder 8
The spacer 30 is obtained by removing 2. The feature of the spacer 30 is that, when the reinforcing bars 21a and 21b are bound by a binding wire 24 made of steel and then inserted into the spacer 30, the retaining prevention plate 12 located just above the U-shaped reinforcing bar receiver 8 is provided. If it is removed, the binding wire 24 will not be in the way, so insertion becomes possible.

[0017]

Since the spacers 16 and 30 have the U-shaped reinforcing bar receiver 8 and the semicircular reinforcing bar receiver 10, the reinforcing bars 21a and 2b can be used.
Insertion of the reinforcements 1b is facilitated and the retaining plate 12 acts, so that the rebars 21a and 21b do not fall off.

The reinforcing bar 2 is located between the reinforcing bar receiving ridges 15a and 15b.
Since 1c is inserted, two pairs of upper and lower rebars of the rebars 21a, 21b and rebars 21c, 21d can be inserted with one spacer 16, 30. Further, the rebar 21a is placed at a height H1 above the base 22, and the rebar 21c is inserted. Can be completely maintained at the height H2 above the base 22.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spacer according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the spacer as viewed from a direction A.

FIG. 3 is a front view of the spacer.

FIG. 4 is an explanatory cross-sectional view of the spacer taken along line BB.

FIG. 5 is a perspective view showing a state where a reinforcing bar is inserted into the spacer.

FIG. 6 is an enlarged perspective view of a spacer portion of FIG.

FIG. 7 is a perspective view of a spacer according to a second embodiment.

FIG. 8 is a perspective view of the spacer viewed from a direction c.

FIG. 9 is an enlarged perspective view of a state where a reinforcing bar is inserted into the spacer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polygon frame 2 Rise side 4 Rise back side 5 Front 6 Back front 7 Bottom 8 U-shaped rebar support 10 Semicircular rebar support 12 Retaining prevention plate 13a Protrusion 13b Protrusion 13c Protrusion 15a Rebar reception protrusion 15b Rebar Receiving ridge 16 Spacer 22 Base 30 Spacer

Claims (2)

[Claims] 1. An upper center 25 of a rising side surface 2 of a polygonal frame 1.
A U-shaped U-shaped reinforcing bar receiver 8 that is closer to the front surface 5 is provided in parallel with the bottom surface 7 and over the entire width B1 of the spacer 16. A spacer 16 is provided in parallel with the bottom surface 7 from the front 5 to the back front 6 over the entire depth D1 of the spacer 16, and with the upper part 26 of the rising back side surface 4 serving as a fulcrum toward the center 18 of the semicircular reinforcing bar receiving member.
Are provided over the entire depth D1 and the bottom surface 7 has semicircular ridges 13a, 13b, 13 parallel to the semicircular reinforcing bar receiver 10.
c, a plurality of reinforcing strips 15a, 1
A spacer for reinforced concrete construction made of synthetic resin, comprising a pair of 5b. 2. The spacer for reinforced concrete construction made of synthetic resin according to claim 1, wherein the retaining prevention plate 12 located just above the U-shaped reinforcing bar receiver 8 is removed.