JP2781507B2 - Reinforcement spacing retainer in concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing member made of reinforcing steel for reinforcing a concrete product buried in a concrete product such as a U-shaped groove, and the reinforcing member is removed from a mold for molding a concrete product. The present invention relates to a rebar spacing holder that is supported in a separated state.

[0002]

2. Description of the Related Art Generally, a reinforcing member buried in a concrete product such as a U-shaped groove is formed in a net shape by connecting a plurality of reinforcing bars vertically and horizontally. A plurality of rebar spacing holders for supporting the mesh reinforcing member in a state separated from the concrete forming frame are mounted at the intersections of the vertical and horizontal rebars at the lowermost stage. At this time, the end of the vertical reinforcing bar (horizontal reinforcing bar) is inserted by the insertion supporting portion of the reinforcing bar spacing holder, and the horizontal reinforcing bar (vertical reinforcing bar) sandwiches the inserted horizontal reinforcing bar. Both sides are elastically held by the pair of holding pieces of the reinforcing bar interval holding tool. In this way, the rebar spacing holder is relatively firmly attached to the vertical and horizontal rebars, and the mesh reinforcing member is supported at a distance from the forming mold by the insertion support portion, and the reinforcing member is exposed from the surface of the concrete product. I try not to.

[0003]

However, since the end side of the horizontal reinforcing bar is fitted by the fitting supporting portion, the mounting of the reinforcing bar spacing holder can be performed smoothly. However, since a pair of holding pieces elastically hold both sides of the vertical reinforcing bar with the horizontal reinforcing bar therebetween, a certain pushing force is required for mounting. That is,
There is a problem that workability at the time of attaching the rebar spacing holder to the reinforcing member is poor.

[0004] In order to improve the workability of mounting, it is conceivable to provide only one holding piece of the rebar spacing holder to hold the vertical rebar. However, when placing concrete in a forming mold or the like, it is conceivable. In some cases, the rebar holding tool may rotate around the horizontal rebar. Therefore, when such a rotation occurs, there is a problem that the reinforcing member is displaced and cannot be supported at an original position.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to improve the workability of mounting on a reinforcing member and to improve the workability of a reinforcing steel bar when external force is applied at the time of placing concrete. It is an object of the present invention to provide a rebar spacing holder which does not rotate around the center.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is formed by connecting a plurality of inner reinforcing bars and a plurality of outer reinforcing bars vertically and horizontally at the time of manufacturing a concrete product. A reinforcing-bar spacing holder attached to a mesh-like reinforcing member, wherein the reinforcing-bar spacing holder is formed in a direction that intersects with the insertion supporting portion that inserts and supports the outer reinforcing bar, and is reinforced. An interval holding portion for holding the member in a state separated from the forming mold of the concrete product, and a reinforcing bar holding portion for holding the inner reinforcing bar, the reinforcing bar holding portion is a pair of support arms for supporting the inner reinforcing bar, A holding piece provided on one of the support arms for elastically holding the inner reinforcing bar, and a holding piece provided on the other supporting arm for holding the inner reinforcing bar in a supported state by contacting the inner reinforcing bar with the outer peripheral surface thereof. Equipped.

[0007]

In the present invention having the above-described structure, when the reinforcing-bar-space holding member is mounted on the reinforcing member, the reinforcing-bar-spacer is first fitted to the outer reinforcing bar by the fitting support. Next, the rebar spacing holder is pushed into the inner rebar side, and the inner rebar is held by the holding piece of the rebar holding portion. At the same time, the holding piece is in contact with the outer peripheral surface and is supported on the support arm. To be held. At this time, since the holding piece is mounted while being in sliding contact with the outer peripheral surface of the inner reinforcing bar, no pushing force is required. Therefore, the pushing force can be reduced, and the workability at the time of mounting the reinforcing-bar spacing member to the reinforcing member is improved.

[0008] Then, the reinforcing member to which the rebar spacing retainer is attached is arranged in a mold for molding a concrete product.
At this time, the reinforcing member is supported by the insertion support portion, and is held in a state separated from the molding frame by the spacing member. Further, since the inner rebar is held in a state of being supported on the support arm by the holding piece, the inner rebar does not shift from above the support arm. Therefore, at the time of placing concrete in the formwork or the like, even if an external force is applied, the rebar spacing holder does not rotate around the outer rebar. As a result, the reinforcing member does not shift.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 3, the rebar spacing holder T of the present embodiment is disposed together with the reinforcing member F in a concrete product forming form S together with the reinforcing member F. The form S is composed of an inner form S1 and its inner form S.
1 and a pair of outer mold frames S2 rotatably connected to both ends. The reinforcing member F has a plurality of (indicated only one) outer rebars F2 formed as substantially inverted U-shaped horizontal rebars. And are welded at predetermined intervals so as to be orthogonal. Therefore, the reinforcing member F is connected to the form S
When placed inside, the inner reinforcing bar F1 faces the inner forming frame S1, and the outer reinforcing bar F2 faces the outer forming frame S2. Further, a plurality of the reinforcing-bar spacing members T are mounted at the lowermost stage of the reinforcing member F at the intersection of the inner reinforcing bar F1 and the outer reinforcing bar F2.

As shown in FIGS. 1 and 2, the rebar spacing holder T is composed of a fitting support portion 1, a spacing holding portion 2, and a rebar holding portion 3, and is integrally formed of synthetic resin.
The insertion support portion 1 is formed in a cylindrical shape having an inside diameter into which the end of the outer reinforcing bar F2 can be inserted. In addition, the insertion support portion 1
In the base outer peripheral surface, triangular cutouts 1a are cut out at equal intervals over four locations, and the area of the end face 1b is reduced. And the insertion support part 1 is the outer reinforcing bar F2.
The end surface 1b is in contact with the bottom surface of the inner formwork S1 to support the reinforcing member F in a state where the end portion is inserted.

The space holding portion 2 has a first holding arm 4 formed on the outer peripheral surface of the distal end of the insertion support portion 1 so as to be orthogonal to the insertion support portion 1, and a symmetrical position with the first holding arm 4. And a second holding arm 5 formed at the end. The first holding arm 4 is formed to be slightly shorter than the second holding arm 5 and to have a length such that the total of both arms 4 and 5 is substantially equal to the distance between the inner form S1 and the outer form F2. ing. Also, the first and second holding arms 4,
5 is tapered and the whole is bent and formed in the shape of a letter,
Reinforcing ribs 4a and 5a are formed on each lower surface. Further, a substantially triangular indicating portion 6 for indicating a mounting direction of the rebar spacing holder T is formed at a tip of the second holding arm 5.

The rebar holding portion 3 includes a pair of support arms 7 and 8 formed at both ends of a base end of the second holding arm 5 so as to be orthogonal to the second holding arm 5. I have. The support arms 7 and 8 are tapered and formed in a linear shape having a predetermined length capable of supporting the inner reinforcing bar F1. Reinforcing ribs 7a and 8a are formed on their lower surfaces. A pair of columnar holding pieces 9a and 9b are erected on the upper surface of the base end of the support arm 7, and a pair of holding pieces 10a and 10b are protruded on the upper surface of the base end of the support arm 8. .

The holding pieces 9a and 9b are arranged so as to protrude from the support arm 7 while being separated from each other by a predetermined distance.
The outer wall surface is formed in an arc shape. Also, the holding piece 9
Semicircular holding recesses 11a, 11b are formed in the lower portions of the inner wall surfaces opposed to each other, a and 9b, so that the inner reinforcing bar F1 can be held while being supported on the support arm 7. Further, oblique mounting guide surfaces 12a, 12b are formed to extend outward from the central portions of the inner wall surfaces of the holding pieces 9a, 9b to the distal end surfaces. The holding pieces 9a and 9b have elasticity, and are spread outward by being pressed in a state where the inner reinforcing bar F1 is in contact with the mounting guide surfaces 12a and 12b, so that the inner reinforcing bar F1 is held by the holding recesses 11a and 11b. 11b.

The holding pieces 10a and 10b are arc-shaped substrates 13a and 13b formed at both ends of the base end of the support arm 8.
Above, they are opposed to each other so as to be separated from each other by the diameter of the inner reinforcing bar F1. The outer wall surfaces of the holding pieces 10a and 10b are curved in an arc shape, and the lower portions of the opposed inner wall surfaces 14a and 14b are formed in a semicircular shape toward the center of the support arm 8 in the width direction. I have. And the holding piece 1
Reference numerals 0a and 10b allow the inner rebar F1 to be held on the support arm 8 between the inner wall surfaces 14a and 14b. Therefore, when the inner reinforcing bar F1 is sandwiched between the holding pieces 9a and 9b and located between the inner wall surfaces 14a and 14b, the movement of the inner reinforcing bar F1 in the left-right direction is restricted. In other words, the holding pieces 10a and 10b do not have the function of holding the inner reinforcing bar F1.
Since only the outer peripheral surface and the inner wall surfaces 14a and 14b are in sliding contact with each other, no pushing force is required for mounting.

[0015] The rebar spacing holder T constructed as described above.
As shown in FIG. 3, is mounted at the lowermost stage of the reinforcing member F at the intersection of the inner reinforcing bar F1 and the outer reinforcing bar F2. First, the insertion support portion 1 of the reinforcing bar interval holding tool T is gripped, and the outer reinforcing bar F2 is inserted into the opening at the distal end thereof to bring the mounting guide surfaces 12a, 12b of the holding pieces 9a, 9b into contact with the inner reinforcing bar F1. .
Next, when the entire reinforcing bar interval holding tool T is pushed in this state, both holding pieces 9a and 9b are pushed out against their elasticity, and the inner reinforcing bar F1 enters the holding recesses 11a and 11b and is held. . At the same time, the inner wall surfaces 14 of the holding pieces 10a, 10b
The inner reinforcing bar F1 is held between the a and 14b while being supported on the supporting arm 8, and the mounting of the reinforcing bar spacing holder T is completed. At this time, the pushing force of the rebar spacing holder T is
a, 9b, and the outer peripheral surface of the inner reinforcing bar F1 smoothly enters the holding pieces 10a, 10b while slidingly contacting the inner wall surfaces 14a, 14b. Then, as shown in FIG. 4, the reinforcing member F on which the rebar spacing holder T is mounted is attached to the form S
When disposed inside, the reinforcing member F is connected to the end face 1 b of the insertion support portion 1.
And the inner bottom surface of the inner formwork S1 abuts and is supported. or,
The reinforcing member F is separated from the inner form S1 by the first holding arm 4 of the space holding portion 2, and the outer form S by the second holding arm 5.
It is kept away from 2. Then, concrete is poured into the formwork S to form a channel-shaped concrete product (not shown). At this time, a part of the concrete passes through the four notches 1a, enters the inside of the insertion support portion 1, and is solidified.

As described above, the rebar spacing holder T of this embodiment is different from the conventional one because it is sufficient to apply the pushing force to the inner rebar F1 only when it is attached to the holding pieces 9a and 9b. , The pushing force is small. Therefore, workability at the time of attaching the reinforcing bar interval holding tool T to the reinforcing member F can be improved.

Further, the inner reinforcing bar F1 has inner wall surfaces 14a, 14b.
In the state of being held in between, the movement of the inner reinforcing bar F1 in the left-right direction is restricted. Therefore, when the concrete is poured into the form S, the rebar spacing holder T does not rotate around the outer rebar F2. As a result, the reinforcing member F is not shifted and is supported at the original position.

Further, the rebar spacing holder T is provided with a holding piece 9a,
Since the inner reinforcing bar 9b holds the inner reinforcing bar F1 on the supporting arm 7, it is possible to prevent the vertical interval of the reinforcing bar interval holder T from rattling.

Also, as shown in FIG.
Is attached to the lowermost stage of the reinforcing member F, the indicator 6
Indicates the inner formwork S1 side. Therefore, it is possible to determine whether or not the camera is properly mounted according to the direction instructed by the indicating unit 6. In other words, in order to attach the outer reinforcing bar F1 to the position other than the lowermost stage, the inner reinforcing bar F1 is fitted and inserted by the fitting support portion 1, and the outer reinforcing bar F2 is clamped by the holding pieces 9a and 9b. At this time, the indicator 6 is set to the outer form S
Since the two sides are indicated, it is possible to quickly detect that the mounting is incorrect.

Further, since the first and second holding arms 4 and 5 are formed in a bent shape, the strength is increased, and the bending due to the concrete pressure can be prevented when the concrete is poured. .

Further, since the notch portion 1a is formed in the insertion support portion 1, the concrete can pass through the notch portion 1a and enter the insertion support portion 1 at the time of concrete casting. As a result, it is possible to prevent the insertion and support portion 1 from being damaged due to shrinkage of the concrete after concrete molding.

Further, since the area of the end face 1b of the insertion support portion 1 is reduced, the area of the end face 1b exposed on the end face of the concrete product after molding the concrete product is reduced. As a result, the appearance as a concrete product can be improved.

The present invention is not limited to the above embodiment, but may be made as follows without departing from the spirit of the present invention. (1) In the embodiment described above, the holding pieces 10a, 10b are connected to the arc-shaped substrates 13a, 13a formed on both side ends of the base end of the support arm 8.
Although the holding pieces 10a, 10b are arranged opposite to each other on the side of the supporting arm 8 on the side of the supporting arm 8 together with the substrates 13a, 13b, the holding pieces 10a, 10b may be arranged so as to be mutually staggered.

(2) Inner diameter of insertion / support portion 1, holding concave portion 11
The shape of a, 11b, the interval and shape of the inner wall surfaces 14a, 14b, and the width of the support arms 7, 8 may be changed according to the diameter of the rebar. Further, the lengths of the first and second holding arms 4 and 5 may be changed according to the distance between the inner mold F1 and the outer mold F2.

[0025]

As described above in detail, according to the rebar spacing retainer of the present invention, the workability of mounting on the reinforcing member can be improved, and the rebar spacing can be improved even when an external force is applied at the time of placing concrete. There is an excellent effect of not rotating around.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rebar spacing holder according to an embodiment of the present invention.

FIG. 2 is a bottom view showing the reinforcing-bar spacing holder.

FIG. 3 is a cross-sectional view showing a state in which a reinforcing member to which a reinforcing-bar interval holding tool is attached is arranged in a mold.

FIG. 4 is a partial cross-sectional view showing a state in which a reinforcing-bar spacing holder is attached to a reinforcing member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fitting support part, 2 ... Space holding part, 3 ... Rebar holding part,
7, 8 ... support arms, 9a, 9b ... holding pieces, 10a, 10b
… Retaining piece, T… Rebar spacing tool, F… Reinforcing member, F1…
Inner bar, F2 ... outer bar.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-61120 (JP, A) JP-A-1-67215 (JP, U) JP-A-59-48916 (JP, U) JP-A-53- 111616 (JP, U) Fully open 1979-86017 (JP, U) Fully open, 55-18503 (JP, U) Fully open, 53-111615 (JP, U) Fully open, 60-83119 (JP, U) JP-B-58-44186 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04C 5/06 B28B 23/02

Claims (1)

(57) [Claims] 1. A plurality of inner reinforcing bars (F1) and a plurality of outer reinforcing bars (F2) during the production of a concrete product.
) Are formed vertically and horizontally to form a net-like reinforcing member (F).
A rebar spacing holder (T) to be mounted on the outer rebar (F2); the rebar spacing holder (T); An interval holding portion (2) formed in a direction intersecting with (1) to hold the reinforcing member (F) away from the forming frame of the concrete product, and a reinforcing bar holding portion for holding the inner reinforcing bar (F1). (3), wherein the rebar holding portion (3) is provided on one of the pair of support arms (7, 8) for supporting the inner rebar (F1) and the support arms (7, 8); The holding pieces (9a, 9b) for elastically holding the inner reinforcing bar (F1) and the other supporting arms (7, 8) are provided, and the inner reinforcing bar (F1) comes into contact with the outer peripheral surface thereof and is held in a supported state. Retainer spacing in a concrete product characterized by having retaining pieces (10a, 10b) .