JPH10611A - Manufacturing method of U-shaped groove, reinforcing bar cage and spacer - Google Patents

Abstract

(57) [Problem] To provide a method of manufacturing a U-shaped groove in which the reinforcing steel at the bottom is formed in a double structure to improve the strength of concrete. SOLUTION: A reinforcing bar cage 1 in which a plurality of U-shaped horizontal reinforcing bars 2 corresponding to the shape of the bottom portion and both side portions of a U-shaped groove and a plurality of vertical reinforcing bars 3 extending in the longitudinal direction are arranged in a mutually orthogonal state is provided in a predetermined shape. A method of manufacturing a U-shaped groove which is placed in a frame via a predetermined spacer and casts concrete in the formwork, and corresponds to the bottom shape in which the horizontal stripes 6 and the vertical stripes 7 are assembled in a lattice. The auxiliary reinforcing bar 8 is supported in a double structure at a bottom position of the reinforcing bar cage 1 at a predetermined interval by using the spacer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a U-shaped groove, a reinforcing cage and a spacer, and more particularly, to a U-shaped cage having a double-layered reinforcing cage using a predetermined spacer. The present invention relates to a method for manufacturing a groove.

[0002]

2. Description of the Related Art Conventionally, in the case of manufacturing a U-shaped groove, a plurality of U-shaped horizontal reinforcing bars and longitudinal reinforcing bars are arranged orthogonally via a spacer, and a reinforcing bar cage having a predetermined shape is formed. After forming the reinforcing bar cage in a predetermined formwork, concrete is poured into the formwork to form a U-shaped groove.

[0003]

In the conventional U-shaped groove, since the horizontal reinforcing bar and the vertical reinforcing bar are disposed at the bottom in a single state, the strength of the concrete is relatively low, and a large earthquake occurs. In such a case, there is a problem that a crack may be generated at the bottom.

[0004] Therefore, in the conventional U-shaped groove, there is a problem to be solved to improve the strength of concrete by forming the bottom reinforcing bar in a plurality of layers.

[0005]

As a specific means for solving the above-mentioned problems of the prior art, the present invention provides a U-shaped horizontal reinforcing bar corresponding to the shape of the bottom and both sides of the U-shaped groove and a longitudinally extending bar along the longitudinal direction. A method of manufacturing a U-shaped groove, in which a plurality of reinforcing bars each having a plurality of reinforcing bars arranged in an orthogonal state are placed in a predetermined form via a predetermined spacer, and concrete is poured into the form. U-shaped, wherein an auxiliary reinforcing bar corresponding to the bottom shape, in which the reinforcing bar and the vertical bar are assembled in a lattice shape, is supported in a double structure at a predetermined position at the bottom position of the reinforcing bar cage by using the spacer. A method for manufacturing a groove is provided.

Further, the present invention provides a reinforcing bar cage in which a plurality of U-shaped horizontal reinforcing bars corresponding to the shape of the bottom portion and both side portions of the U-shaped groove and a plurality of vertical reinforcing bars along the longitudinal direction are arranged in an orthogonal state. An auxiliary reinforcing bar corresponding to the bottom shape in which a horizontal bar and a vertical bar are assembled in a lattice shape, and using a spacer for maintaining a space between the reinforcing bar and a formwork at a bottom portion of the reinforcing bar cage, the auxiliary reinforcing bar is provided at a predetermined interval. The present invention provides a rebar basket characterized by having a bottom portion formed in a double structure.

Further, the present invention is a spacer for arranging a plurality of reinforcing bar cages in which a plurality of horizontal reinforcing bars and vertical reinforcing bars are arranged in an orthogonal state at a predetermined interval in a formwork. A first and a second holding portion for respectively holding a horizontal reinforcing bar and a vertical reinforcing bar of one reinforcing cage, and a third holding portion for holding either the horizontal reinforcing bar or the vertical reinforcing bar of another reinforcing cage. And a holding portion formed integrally with the holding portion via a main body portion.

Further, the present invention is a spacer for arranging a plurality of reinforcing bar cages in which a plurality of horizontal reinforcing bars and a plurality of vertical reinforcing bars are arranged in an orthogonal state at a predetermined interval in a formwork. The main body portion of the first insertion portion for inserting the end of the horizontal reinforcing bar or the vertical reinforcing bar of one reinforcing cage, and the second inserting portion for inserting the end of the horizontal reinforcing bar or the vertical reinforcing bar of the other reinforcing cage. And a spacer which is formed integrally with the spacer.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of a method for manufacturing a U-shaped groove according to the present invention and an example of a reinforcing cage used in the method will be described with reference to the drawings. First, in FIGS. 1 to 4,
Reference numeral 1 denotes a reinforcing bar cage. The reinforcing bar cage 1 is buried in a concrete product having a U-shaped groove, and has a U-shaped horizontal reinforcing bar 2 corresponding to the shape of the bottom and both sides of the U-shaped groove.
And a plurality of vertical reinforcing bars 3 extending in the longitudinal direction are arranged in a mutually orthogonal state, and the reinforcing bar cage 1 is disposed in a predetermined formwork 4 via a predetermined spacer 5. Things.

For the purpose of reinforcing the bottom of the U-shaped groove to be formed, an auxiliary reinforcing bar 8 corresponding to the bottom shape is formed at the bottom of the reinforcing bar 1 by assembling a horizontal bar 6 and a vertical bar 7 in a lattice shape. The spacers 5 are disposed at predetermined intervals, and the bottom is formed as a double-structured reinforcing bar.

[0011] The reinforcing bar cage 1 having the double bottom structure as described above is placed in a predetermined form 4 and concrete is poured into the form 4 so that the reinforcing bar at the bottom is doubled. By producing a U-shaped groove, the concrete strength at the bottom can be improved.

Next, a method of manufacturing the above-described U-shaped groove and a spacer used to support the reinforcing cage will be described. As shown in FIGS. 5 and 6, the spacer 9 includes a first holding portion 1 for holding the horizontal reinforcing bar 2 of the reinforcing bar 1.
0, a second holding portion 11 for holding the vertical reinforcing bar 3, and a third holding portion 12 for holding the vertical bar 7 of the auxiliary reinforcing bar 8 are provided via the main body portion 13. Are formed integrally from a synthetic resin material such as plastic.

The first holding portion 10 has an opening 14 facing downward.
The holding portions 16 are formed by bending the distal ends of the left and right holding pieces 15 inwardly, respectively, and are formed with elasticity as a whole.

The second holding portion 11 is provided with the first holding portion 1.
It is formed at a position adjacent to 0 and has a substantially U-shape having an opening 17 in the upward direction. The second holding portion 11 is formed so as to hold the vertical reinforcing bar 3 in a direction orthogonal to the horizontal reinforcing bar 2 held by the first holding portion 10.

The first holding portion 10 and the second holding portion 11 are provided with a main body portion 13 having a predetermined length.
The upper end of the main body 13 is tapered toward the tip 18.

At a predetermined position of the main body 13, a third holding portion 12 is provided. The third holding portion 12 has an opening 19 in the lateral direction, and tapered portions 21 are formed on the inner surfaces of the upper and lower holding pieces 20, respectively, and the third holding portion 12 is adjacent to the tapered portion 21. A holding section 22 is provided.

Next, a second embodiment of the spacer will be described. The spacer 23 of the second embodiment is similar to the spacer 23 shown in FIGS.
As shown in FIG. 5, the first holding portion 10, the second holding portion 11, and the third holding portion 12 are formed in the same shape as the spacer 9 of the first embodiment, and thus the same reference numerals are used. The description is omitted here.

This spacer 23 is, as shown in FIG.
The lower end of the main body 24 is bent at a predetermined angle from a substantially central position.

As described above, since the main body portion 24 is formed by bending, as shown in FIG.
When the horizontal bar 6 of the auxiliary reinforcing bar 8 and the horizontal bar 6 are disposed at the same position in the vertical direction, the spacer 23 can be disposed around the horizontal bar 6.

Next, a third embodiment of the spacer will be described. The spacer 25 according to the third embodiment is for disposing the end of the vertical reinforcing bar 3 of the reinforcing bar cage 1 and the end of the vertical reinforcing bar 7 of the auxiliary reinforcing bar 8 at a predetermined interval.

As shown in FIGS. 9 to 12, the spacer 25 of the third embodiment has an opening 26 in the horizontal direction and a first insertion portion 27 for inserting the end 3a of the vertical reinforcing bar 3. A main body portion 28 formed integrally with the first insertion portion 27 and having a predetermined length; and an opening portion 29 formed at a predetermined position of the main body portion 28 and in the same direction as the first insertion portion 27. And a second insertion portion 30 into which the end 7a of the vertical streak 7 is inserted.

Next, a method of arranging auxiliary reinforcing bars 8 at predetermined positions at the bottom portion of the reinforcing bar cage 1 using the spacers of the first to third embodiments will be described. First, a U-shaped horizontal reinforcing bar 2 corresponding to the shape of the bottom and both sides of the U-shaped groove
And a plurality of longitudinal reinforcing bars 3 extending in the longitudinal direction are arranged in a perpendicular manner, and a reinforcing bar cage 1 is formed via a predetermined spacer.

After the second holding portion 11 of the spacer 9 is held by the vertical reinforcing bar 3 at the orthogonal position 31, the opening 14 of the first holding portion 10 is brought into contact with the horizontal reinforcing bar 2. Then, it is inserted up to the holding portion 16.

Further, after the auxiliary reinforcing bar 8 in which the horizontal bar 6 and the vertical bar 7 are assembled in a lattice shape is brought close to the bottom position, the vertical bar 7 is inserted into the third holding portion 12.

At this time, when the horizontal reinforcing bar 2 and the horizontal bar 6 are located at the same position in the vertical direction, as described above, the spacer 23 is disposed around the horizontal bar 6 by using the spacer 23 of the second embodiment. Just set it.

The first insertion portion 27 and the second insertion portion 30 of the spacer 25 of the third embodiment are inserted into the respective ends 3a and 7a of the vertical reinforcing bar 3 and the vertical bar 7, respectively.

If the reinforcing bar cage 1 formed as described above is placed in a predetermined formwork 4 and cast concrete, the reinforcing bar at the bottom can produce a double U-shaped groove and the concrete strength at the bottom can be increased. Can be improved.

Although the illustrated auxiliary reinforcing bar 8 has a flat shape, it is not necessarily limited to this shape. For example, an auxiliary reinforcing bar having the same shape and a small size as the reinforcing bar cage 1 is used. Using it, it is arranged at a predetermined interval from the reinforcing bar 1
It goes without saying that not only the bottom of the U-shaped groove but also the reinforcing bars on both sides may be formed in a double structure.

[0029]

As described above, the method of manufacturing a U-shaped groove according to the present invention comprises the steps of forming a U-shaped horizontal reinforcing bar corresponding to the shape of the bottom and both sides of the U-shaped groove and a vertical reinforcing bar along the longitudinal direction. A method of manufacturing a U-shaped groove in which a plurality of reinforcing rod cages each arranged in an orthogonal state are put in a predetermined form via a predetermined spacer, and concrete is poured into the form, comprising a horizontal line and a vertical line. By supporting the reinforcing bars corresponding to the bottom shape formed in a lattice shape at a bottom position of the reinforcing bar cage with a predetermined interval using the spacers, the reinforcing bar at the bottom is doubled. Since the U-shaped groove can be manufactured, the strength of the concrete is improved, and an excellent effect of high durability in an earthquake or the like is exerted.

Further, in the reinforcing bar cage according to the present invention, a plurality of U-shaped horizontal reinforcing bars corresponding to the shape of the bottom portion and both side portions of the U-shaped groove and a plurality of vertical reinforcing bars along the longitudinal direction are arranged orthogonally. The reinforcing bar comprises a reinforcing bar and an auxiliary reinforcing bar corresponding to the bottom shape in which a horizontal bar and a vertical bar are assembled in a lattice shape. Are arranged at predetermined intervals, and the bottom is formed in a double structure.If this rebar basket is placed in a predetermined form and concrete is cast, the reinforcing bar at the bottom forms a double U-shaped groove. Since it can be manufactured, there is an excellent effect that the strength of concrete is improved.

Further, the spacer according to the present invention is a spacer for arranging a plurality of reinforcing bar cages in which a plurality of horizontal reinforcing bars and vertical reinforcing bars are arranged in an orthogonal state at a predetermined interval in a mold. The spacers are for holding the horizontal reinforcing bar and the vertical reinforcing bar of one reinforcing bar respectively, and the first and second holding portions for holding the horizontal reinforcing bar and the vertical reinforcing bar of the other reinforcing bar. By forming the third holding portion integrally with the third holding portion via the main body portion, there is an excellent effect that a plurality of rebar baskets can be arranged while maintaining a predetermined interval.

Further, the spacer according to the present invention is a spacer for arranging a plurality of reinforcing bar cages in which a plurality of horizontal reinforcing bars and vertical reinforcing bars are arranged in an orthogonal state at a predetermined interval in a formwork. The spacer has a first insertion portion for inserting an end of a horizontal reinforcing bar or a vertical reinforcing bar of one reinforcing cage, and a second inserting portion for inserting an end of a horizontal reinforcing bar or a vertical reinforcing bar of another reinforcing cage. Are formed integrally with each other via the main body, thereby providing various excellent effects that the ends of the plurality of reinforcing bars can be arranged while maintaining a predetermined interval.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a reinforcing bar cage and auxiliary reinforcing bars.

FIG. 2 is a cross-sectional view illustrating a state in which a reinforcing cage is placed in a formwork.

FIG. 3 is a plan view of a reinforcing rod cage.

FIG. 4 is an explanatory diagram showing a state in which auxiliary reinforcing bars are arranged on a reinforcing bar basket via spacers.

FIG. 5 is a front view of a first embodiment of the spacer according to the present invention.

FIG. 6 is a side view of a first embodiment of the spacer according to the present invention.

FIG. 7 is a front view of a second embodiment of the spacer according to the present invention.

FIG. 8 is a side view of a second embodiment of the spacer according to the present invention.

FIG. 9 is a front view of a third embodiment of the spacer according to the present invention.

FIG. 10 is a side view of a third embodiment of the spacer according to the present invention.

FIG. 11 is a rear view of a third embodiment of the spacer according to the present invention.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rebar basket 2 Horizontal rebar 3 Vertical rebar 3a End 4 Formwork 5 Spacer 6 Horizontal rebar 7 Vertical rebar 7a End 8 Auxiliary rebar 9 Spacer 10 First holding part 11 Second holding part 12 Third holding Part 13 Main body part 14 Opening part 15 Nipping piece 16 Holding part 17 Opening part 18 Tip part 19 Opening part 20 Nipping piece 21 Tapered part 22 Holding part 23 Spacer 24 Body part 25 Spacer 26 Opening 27 First insertion part 28 body part 29 opening part 30 second insertion part 31 orthogonal position

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[Procedure amendment]

[Submission date] July 9, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

Although the illustrated auxiliary reinforcing bar 8 has a flat shape, it is not necessarily limited to this shape. For example, an auxiliary reinforcing bar having the same shape and a small size as the reinforcing bar cage 1 is used. Using it, it is arranged at a predetermined interval from the reinforcing bar 1
It goes without saying that not only the bottom of the U-shaped groove but also the reinforcing bars on both sides may be formed in a double structure. In addition, the first and second implementations
The spacers 9 and 23 in the example are used when the reinforcing bar is not of a double structure.
Of course, it can also be used.

Claims (4)

[Claims] 1. A cage having a plurality of U-shaped horizontal reinforcing bars corresponding to the shape of the bottom portion and both side portions of the U-shaped groove and a plurality of vertical reinforcing bars extending in the longitudinal direction arranged in a perpendicular manner in a predetermined form. A method of manufacturing a U-shaped groove in which concrete is poured into the formwork through a predetermined spacer, wherein the auxiliary reinforcing bar corresponding to the bottom shape in which a horizontal streak and a vertical streak are assembled in a grid. A method of manufacturing a U-shaped groove, wherein the U-shaped groove is supported at a bottom position of the rebar cage with a predetermined interval by using a spacer. 2. A reinforcing bar cage in which a plurality of U-shaped horizontal reinforcing bars corresponding to the shape of the bottom portion and both side portions of the U-shaped groove and a plurality of vertical reinforcing bars extending in the longitudinal direction are arranged in an orthogonal state, and a horizontal bar and a vertical bar. And an auxiliary reinforcing bar corresponding to the bottom shape formed in a lattice shape, and the auxiliary reinforcing bars are arranged at a predetermined interval at a bottom portion of the reinforcing bar cage by using a spacer that maintains an interval with a formwork. A reinforced cage with a double bottom structure. 3. A spacer for arranging a plurality of reinforcing bar cages in which a plurality of horizontal reinforcing bars and a plurality of vertical reinforcing bars are arranged in an orthogonal state at a predetermined interval in a formwork, wherein the spacer comprises one reinforcing bar. First and second holding portions for holding the horizontal and vertical reinforcing bars of the basket, respectively, and a third holding portion for holding either the horizontal or vertical bars of the other reinforcing bars. And a spacer formed integrally with the body via a main body. 4. A spacer for arranging a plurality of reinforcing bar cages in which a plurality of horizontal reinforcing bars and a plurality of vertical reinforcing bars are arranged in an orthogonal state at a predetermined interval in a formwork, wherein the spacer comprises one reinforcing bar. The first insertion portion for inserting the end of the horizontal reinforcing bar or the vertical reinforcing bar of the basket, and the second inserting portion for inserting the end of the horizontal reinforcing bar or the vertical reinforcing bar of another reinforcing bar are integrally formed via the main body. A spacer characterized by being formed.