JPH09184243A - Reinforcement interval retainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a reinforcement interval retainer for retaining the interval between reinforcement and form to correspond to a variety of reinforcement retaining intervals by varying the mounting posture of the retainer on the form. SOLUTION: The main body 1 of a reinforcement interval retainer, formed integrally from a synthetic resin, retains the interval between form and horizontal reinforcement by mounting vertical reinforcement in its cylindrical fitting part 2 that vertically passes through it, causing the lower end faces of support plates 3, 3a projected in cruciform to be placed on the horizontal reinforcement, and bringing small hemispherical projections 6, 6a formed on the upper end faces of the support plates 3, 3a into contact with the form. When the retainer main body 1 is inverted, the retaining interval varies. Support ribs 5a, 5b provided between the support plates 3, 3a are placed on the reinforcement, and the two support plates 3, 3a are brought into contact with the form as legs to obtain another retaining interval. Therefore, the reinforcement can be held at a variety of retaining intervals by use of one retainer main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar spacing holder for holding a spacing between a reinforcing bar and a mold in a reinforced concrete structure or a concrete product so that a desired cover thickness can be obtained.

[0002]

2. Description of the Related Art Heretofore, various types of reinforcing bar spacing holders of this type have been found. For example, a reinforcing bar spacing holder a as shown in FIG. 16 has a body of four arm portions b, b1. A cylindrical first reinforcing bar holding part d for inserting and holding a vertical reinforcing bar c and a horizontal reinforcing bar c1 arranged orthogonal to the first reinforcing bar holding part d are sandwiched and held. Second rebar holding part d
1, d2 are projected on each of a pair of arm parts b2, b3 on the same line, but in reinforced concrete structures and concrete products, the distance between the reinforcing bar and the formwork depends on the type and other conditions. Since the diameters of the reinforcing bars used are different, and the diameters of the reinforcing bars used are also different, it is necessary to prepare various kinds of reinforcing bar spacing holders a to be used for the reinforcing bars in advance. It is necessary to select an appropriate rebar spacing retainer depending on the place of use, and the work is complicated in the mounting work while properly using them, and there is a drawback of inefficiency.

[0003]

SUMMARY OF THE INVENTION According to the present invention, even if the distance between the reinforcing bar and the form or the diameter of the reinforcing bar used is different, it is not necessary to select the reinforcing bar according to this condition, and it is easy to use. The purpose is to provide the ingredients.

[0004]

SUMMARY OF THE INVENTION In view of the problems of selective use of the reinforcing bar interval holders based on the above-mentioned prior art, the present invention is centered around a cylindrical fitting portion and is the same as the fitting portion in the cross direction. At the same time as forming a supporting plate of height, at least one supporting plate has a protruding length different from that of the other supporting plates, and the upper and lower end face portions of the supporting plate have different protruding lengths at upper and lower sides. Provided is a reinforcing bar spacing holder in which a right-angled part formed between adjacent supporting plates is provided with a substantially L-shaped supporting rib, and a vertical reinforcing bar is inserted into the fitting part, The reinforcing bar can be easily attached to the crossed reinforcing bar by placing it on the upper end surface part of the support plate having a protruding length corresponding to its diameter, and the covering thickness at this time is the upper and lower convex parts having different lengths. This can be changed by using the rebar spacing holder upside down. It can also be used as a flat support bar support. In this case, the rebar spacing retainer is not only used for placing rebar on the end face of the opening of the fitting part, but also for supporting two support plates in a right angle relationship. This is to solve the above-mentioned drawbacks by vertically setting the legs so that the reinforcing bars can be placed and used at the inner corners of the upward supporting ribs.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings, in which 1 is a main body of a reinforcing bar spacing holder integrally formed of synthetic resin, and the main body 1 penetrates vertically. A substantially cylindrical fitting portion 2 is provided, and a rectangular support plate 3 is provided around the fitting portion 2 in the cross direction of the fitting portion 2,
3a ... are formed in a protruding manner, convex portions 4, 4a ... Are projected on the upper and lower end surface portions of the support plates 3, 3a. -Shaped support ribs 5, 5a ... Are formed.

Each of the support plates 3, 3a ... Has the same or at least one different length of the upper and lower end face portions as the projecting length, and the convex portions 4, 4a. The upper side and the lower side have a substantially rectangular shape, the upper side and the lower side have the same length, and the upper side and the lower side have different lengths. Protrusions 6, 6a ... Are provided.

Therefore, when the main body 1 is turned upside down, the heights H and H1 of the end face portions above the support plates 3, 3a ... H1 is set appropriately.

Further, the inner corner portions formed by the convex portions 4, 4a ... And the upper and lower end surface portions of the support plates 3, 3a ... Are formed in an arc shape having a predetermined curvature.

The distance X from one point of the inner diameter of the fitting portion 2 to the convex portions 4, 4a ... On the projecting lines of the support plates 3, 3a ... Is set to be equal to or less than one diameter of the crossed reinforcing bars.

Therefore, in the figure, the convex portions 4, 4a ... Shown at the tips of the upper and lower end face portions of the support plates 3, 3a ..., However, if the distances X, X1. , Convex portion 4,
4a may be provided at a midway position between the base end and the tip of the support plates 3, 3a.

Reference numerals 7, 7a ... Represent convex portions 4, 4a ... And support plates 3, 3a.
Is a single rib protruding from the side surface of the supporting member in the vertical direction. The ribs 7, 7a provided on the supporting plates 3, 3a in a right angle relationship are provided at the ends of the supporting ribs 5, 5a. It is continuously formed.

Further, the inner corners of the support ribs 5, 5a ... Are formed in an arc shape having a predetermined curvature, and the formation positions of the support ribs 5, 5a.
Although it is provided in the lower part in FIG. 1, it may be provided in the upper part, the central part, both in the upper and lower parts, or in the upper and lower parts and in the central part in FIG.

In the above description, the fitting portion 2 is shown as vertically penetrating, but one of the openings of the fitting portion 2 is closed as shown in FIG. 12, or as shown in FIG. A cut groove 9 having a substantially V-shaped cross section may be formed around the surface 8 and the closed surface 8 may be punched out so as to be opened.

Further, in the case where the closing surface 8 without the cut groove 9 is provided, as shown in FIGS. 14 and 15, the leg portions having the same length as the convex portions 4, 4a ... 10 may be provided, and the lower end surface of the leg portion 10 has a protrusion 6 similar to the protrusions 4, 4a.
Is provided.

The main body 1 is not only used upside down, but as shown in FIG. 11, two support plates 3 and 3a in a right-angled relationship.
It is also possible to use the main body 1 in a recumbent state by using the ... as legs, and the height from the frame mounting surfaces F, F1 to the supporting ribs 5, 5a whose inner corners face upward is the supporting plates 3, 3a. Is appropriately set depending on the protruding length of the ... And the thickness of the supporting ribs 5, 5a.

As described above, when the main body 1 is used in a recumbent state, basically the support plates 3, 3a ... Are legs, but the thickness of the support ribs 5, 5a ... And the ribs 7, 7a. Depending on the supporting plates 3, 3a, the ribs 7, 7a, ... may also be formed on the formwork mounting surface F,
In some cases, it may be grounded to F1, or only the ribs 7, 7a ... May be grounded to the mold mounting surface F, F1.

Next, the operation of the reinforcing bar spacing holder according to the present invention will be described. When mounting the main body 1 on the crossed reinforcing bars S and S1, the vertical reinforcing bar S is inserted into the fitting portion 2 and the horizontal reinforcing bar S1 is attached. Placed on the support plates 3, 3a ....

The main body 1 includes a mold mounting surface F, F1 to a support plate 3,
Since the heights H and H1 of the upper end surface of 3a differ depending on whether the main body 1 is used facing up or down, the height is used depending on the desired cover thickness.

Further, the horizontal reinforcing bars S1 are made to correspond to the upper end surface portions of the supporting plates 3, 3a ... Where the distances X, X1 ... From the fitting portion 2 to the convex portions 4, 4a ... Are greater than the diameter of the horizontal reinforcing bars S1.

The main body 1 can also be used as a bar support for holding the reinforcing bar S in a horizontal state. In this case, one of the end faces of the upper and lower openings of the fitting portion 2 of the main body 1 intersects with the reinforcing bar S. The reinforcing bars S are placed and supported so as to pass through the support plates 3, 3a ...

Even in the above-mentioned use as a bar support, as a matter of course, from the frame mounting surfaces F, F1 to the supporting plates 3, 3a ...
It is possible to use the main body 1 in an upward direction and a downward direction in which the heights H and H1 are up to the upper end surface part of the body 1, and the horizontal height position of the reinforcing bar S from the formwork can be selected.

As another method of using the bar support, the main body 1 is laid down with two supporting plates 3, 3a ...
The rebar S can be placed on the 5a ..., and in this case as well, the height H from the frame mounting surfaces F, F1 to the inner corners of the supporting ribs 5, 5a.
2, H3 can be selected.

Further, in the main body 1 in which the fitting portion 2 shown in FIG. 12 is provided with the closing surface 8, when the crossing portion of the crossed reinforcing bars S and S1 having the vertical reinforcing bar S is mounted, only the upward facing use of the main body 1 is possible. However, the use as a versatpart is similar to the above, and in the main body 1 in which the leg portion 10 is provided outside the closing surface 8 as shown in FIGS. It can be used only in the upward direction, and the use of the body 1 in the recumbent state is the same as above.

Further, in the main body 1 shown in FIG. 13 in which the notch groove 9 is formed around the closed surface 8, the closed surface 8 is punched out to open it if necessary, and in other uses, as described above. It is the same.

Further, since the projections 6 and 6a are provided on the same plane when the main body 1 is used in the upward and downward directions, the main body 1 is floated from the inner surface of the mold, and after the mold is removed, the support plate is released. .. are not directly exposed on the concrete surface, so that they are not exposed to the surface of the concrete product, so that the strength and aesthetics of the concrete product are not deteriorated.

Also, when the body 1 is used in a recumbent state,
The ridges of the support plates 3, 3a ... Or the ribs 7, 7a ... Abut only on the formwork, and the support plates 3, 3a ... And the ribs 7, 7a. It prevents the deterioration of the strength and aesthetics of concrete products.

[0027]

In summary, the present invention is a reinforcing bar spacing holder made of a synthetic resin, and a supporting plate having the same height as the fitting portions 2 in the cross direction with the cylindrical fitting portion 2 as the center. 3 and 3a are formed to project, and convex portions 4 and 4a are formed to project from the upper and lower end surface portions of the support plates 3, 3a, so that the main body 1 can be used for either upward or downward use. Even when mounting on the crossed reinforcing bars S and S1, the vertical reinforcing bars S can be inserted into the fitting portion 2 and the horizontal reinforcing bars S1 can be simply placed on any one of the supporting plates 3, 3a ... Since the reinforcing bar interval holder according to the present invention does not have a structure in which elongated arms cross in a cross shape as in the conventional case, it has strength not to be damaged by an impact generated during concrete pouring.

Further, when the vertical reinforcing bars S are used without being inserted into the fitting portion 2, for example, even when the crossed reinforcing bars S and S1 are supported horizontally, one of the end faces of the upper and lower openings of the fitting portion 2 is reinforced. A bar support for horizontally supporting the rebars S and S1 if the rebars S and S1 are placed and supported so that the rebars S and S1 pass between the support plates 3 and 3a. Also available as

Further, since at least one of the support plates 3, 3a ... Has a protruding length different from that of the other support plates 3, 3a ..., the distance X from the fitting portion 2 to the convex portions 4, 4a. The horizontal reinforcing bars S1 are made to correspond to the upper end surface portions of the supporting plates 3, 3a, which are larger than the diameter of the horizontal reinforcing bars S1, and even if the diameter of the horizontal reinforcing bars S1 varies depending on the use location,
It is possible to improve work efficiency by eliminating the need for the conventional installation work of selecting an appropriate rebar spacing retainer while using them properly, and especially if all the projecting lengths of the support plates 3, 3a are different. Can be used on the street.

Further, since the upper and lower convex portions 4, 4a ... Have different projecting lengths, the main body 1 can be used upward or downward, and from the formwork to the crossed reinforcing bars S and S1. Since the distances H, H1 ... Can be changed, it is possible to correspond to two different cover thicknesses.

Further, since the substantially L-shaped support ribs 5, 5a ... Are provided at the right angle portion formed between the adjacent support plates 3, 3a.
In addition to the above-mentioned upward use or downward use of the main body 1, the main body 1 is laid down and the supporting ribs 5, 5a whose inner corners are directed upwards ...
By mounting the rebar S on the, the rebar S can be supported horizontally at a predetermined height position above the form.

Therefore, according to the present invention, it is possible to hold the crossed rebars in the vertical state or the horizontal state with a desired cover thickness, and to cope with the rebar diameters which are different depending on the place of use and other conditions. Since it is possible to use it, it is easy to use because it is not necessary to use many kinds of rebar spacing holders as in the past, and the work efficiency can be improved. Since it is not necessary to manufacture each separately, the manufacturing cost can be reduced, and the practical effects are great.

[Brief description of the drawings]

FIG. 1 is a perspective view of a reinforcing bar spacing holder according to the present invention.

FIG. 2 is a plan view of FIG. 2;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a plan view showing a usage state.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a right side view of FIG.

FIG. 9 is a plan view showing another usage state.

FIG. 10 is a front view of FIG. 9;

FIG. 11 is a diagram showing a use state when lying down.

FIG. 12 is a cross-sectional view showing a modified example of the reinforcing bar spacing holder.

FIG. 13 is a cross-sectional view showing a modified example of the reinforcing bar interval holder.

FIG. 14 is a bottom view showing a modified example of the reinforcing bar interval holder.

FIG. 15 is a cross-sectional view of the reinforcing bar spacing holder of FIG.

FIG. 16 is a perspective view showing a conventional reinforcing bar spacing holder.

[Explanation of symbols]

 2 Fitting part 3, 3a ... Support plate 4, 4a ... Convex part 5, 5a ... Support rib

Claims (4)

[Claims] 1. A reinforcing bar spacing holder made of synthetic resin, wherein support plates having the same height as the fitting portions are formed to project in the cross direction around the cylindrical fitting portion as a center. A reinforcing bar spacing holder characterized in that protrusions are formed on upper and lower end surface portions of the plate. 2. The reinforcing bar spacing holder according to claim 1, wherein at least one support plate has a protruding length different from that of the other support plates. 3. The reinforcing bar spacing holder according to claim 1, wherein the upper and lower protrusions have different projecting lengths. 4. The reinforcing bar spacing holder according to claim 1, wherein a substantially L-shaped support rib is provided at a right-angled portion formed between adjacent support plates.