JPH08120933A - Arrangement of upper end open type beam stirrup and stirrup supporting and space holding fitting for this arrangement - Google Patents

Abstract

PURPOSE: To facilitate the beam stirrup arrangement work by using a space holding fitting formed by integrally connecting L-shape reinforcement support parts, which are arranged in parallel with each other with the predetermined space. CONSTITUTION: L-shape reinforcement support parts 1, 2, 3, which are arranged in parallel with each other with a stirrup arrangement space D in front and rear thereof, are integrally connected to each other by connecting members 4, 4, 5, 5 so as to form a fitting A. Each first advance stirrup b1 of each set of three reinforcement support parts 1, 1, 2, 2, 3, 3 of the fittings A, A, which are arranged in right and left opposite to each other, are bound with annealing wire at the lower corner parts b11 , b11 of right and left so as to give the self-support characteristic, and a reinforcement space D is formed between the adjacent stirrups b1 , b1 . The process for similarly giving the self-support characteristic to a set of three second advance stirrups with these fittings A, A can be performed by binding the stirrups one by one to the fittings provided right and left opposite to each other for fixation, and the work can be easily performed by one worker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar construction method for an upper end type beam stirrup and a stirrup supporting / spacing metal used in the method.

[0002]

2. Description of the Related Art Stirrups used for assembling a reinforcing bar for beams are classified into a three-sided type with an open top and a four-sided type with a closed upper end. Neither type is self-supporting. .

Conventionally, when arranging a beam stirrup having an open upper end, a beam reinforcing bar is assembled from a main bar and a stirrup so as to be supported by a cross bar above a concave groove of a beam form. After that, a method has been adopted in which the rebar is removed and the rebar for the beam is dropped into the beam formwork and arranged.

However, in the above-mentioned conventional construction method, a plurality of workers are inevitably joint work, and a large amount of manpower and time are required for the bar arrangement work.

[0005] The present invention has been made to eliminate such problems of the conventional method.

[0006]

SUMMARY OF THE INVENTION According to the present invention, first and second leading stirrups each having an open top are provided at two positions, one end and the other end, in the longitudinal direction of the beam formwork. Using a stirrup supporting / spacing holding metal having a thickness and a space corresponding to the thickness of the concrete cover between the bottom surface and both side surfaces of the beam formwork.

[0007] A lower setup line is provided at the lower end of the lower side of the stirrup, and a lower setup bar is provided at the upper outer side of both sides so as to straddle between the first and second preceding stirrups set in a self-standing state in the beam formwork. After the step of fixing the upper setup streaks and the arrangement of the upper and lower setup stirrups, respectively, between the first and second preceding stirrups, the succeeding stirrup having the upper end opened in the beam formwork. By inserting a plurality of pieces at intervals in the longitudinal direction of the beam formwork, the insertion stirrup is tied and fixed on both sides to the upper setup streaks with the lower end side received by the lower setup streaks, And a step of constraining the stirrup in an upright position at the insertion position.

Further, the present invention relates to a stirrup supporting and spacing holding metal applied to the reinforcing arrangement method according to claim 1, wherein at least one front face L which can be bound and fixed along a lower end corner of the stirrup. A bottom portion fixed to a horizontal portion at a lower end of the reinforcing bar supporting portion and the reinforcing bar supporting portion, the reinforcing bar supporting portion being self-standing on the bottom surface of the beam form with an interval substantially corresponding to the cover thickness of concrete. Spacing and foot portion, and the side portion fixed to the vertical portion of the reinforcing bar support portion and forming a space between the reinforcing bar supporting portion and the side portion of the beam formwork corresponding to the cover thickness of concrete. And a space holding portion.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an example of a stirrup / interval retainer A which is applied to the implementation of the method of the present invention.

As is apparent from FIG. 1, the metal fitting A has front L-shaped rebar supporting portions 1, 2, 3 arranged in parallel with a stirrup rebar spacing D in front and back. , 2, 3 are connecting members 4 at two positions on the left and right of horizontal portions 1a, 2a, 3a at the lower end and at two upper and lower portions of vertical portions 1b, 2b, 3b rising from one end of the horizontal portions 1a, 2a, 3a. For example, welding means are applied and integrated by 4, 5, and 5. The number of connecting members 4, 4, 5 and 5 and the installation location can be changed as appropriate.

Downwardly projecting feet 6, 6, 6, 6 are formed at the front and rear ends of the left and right connecting members 4, 4 for connecting the horizontal parts 1a, 2a, 3a, respectively. Acts as a bottom gap holding section that forms a gap corresponding to the cover thickness of the concrete on the bottom side of the beam form a (see FIG. 4), and as a foot section that gives independence to the reinforcing bar supports 1, 2, and 3. The function is also used.

The upper and lower connecting members 5, 5 connecting the vertical portions 1b, 2b, 3b are provided at both ends with horizontal portions 1a, 2a, 3a.
Side spacing members 7, 7, 7, 7, 7 projecting in the opposite direction to
The space holding portions 7 have a function of forming a space corresponding to the cover thickness of the concrete with the inner surface of the beam form a.

The reinforcing bars 1, 2, 3 and the connecting members 4,
4, 5 and 5 may be made of an iron wire material, and the bottom space holding / foot portions 6 and the side space holding portions 7 may be formed by bending the iron wire material.

The feet 6 and the side gap holding portions 7 may be provided with a plastic cap 8 as shown in the figure, or may be subjected to a rust-proofing process instead of the cap.

The stirrup supporting and spacing holding metal A is used as a pair of left and right (see FIG. 4) when arranging reinforcing bars for the beam stirrup. Therefore, the lateral width is 1 of the groove width of the beam form a.
/ 2 of the groove width.
It is set in a range of about 10 to 4/10.

On the other hand, the vertical height is preferably relatively high in consideration of the space retention, and is 1/1 / the groove depth of the ordinary beam form a.
The height is set to slightly over 2.

The beam stirrup rebar arrangement method according to the present invention is carried out using the above hardware A.

[0019] Figure 2 shows the situation of autonomy imparting step for the first preceding stirrup b _1. In this step, a pair of left and right hardware A, A is used for the purpose of imparting independence, and each of the rebar supporting portions 1, 1, 2, 2, 3, 3 of the hardware A, A facing left and right is used. 3 in each pair
Each set of the first preceding stirrup b ₁ is supported and fixed by, for example, track number Yuibaku the left and right lower corner portion b _11, b ₁₁ (not shown). Haisuji distance D to this the first between the preceding stirrup b ₁ adjacent with star respectively autonomy to wrap b1 is applied, b ₁
(See FIG. 1) is formed.

In the same manner, the self-supporting property is imparted to the second leading stirrup b ₂ (see FIG. 4) of one set of three metal fittings A, A.
Is performed using.

In the process of imparting independence to the first and second preceding stirrups b ₁ , b ₂ , the stirrups are connected one by one to the brackets A, A installed so as to face left and right. Since it is sufficient to tie and fix, it can be easily performed by one worker.

On the other hand, as shown in FIG. 3, for example, two lower setup bars c are previously inserted in the beam form a.

[0023] then placed first preceding set of stirrup b ₁ of autonomy given to the one end of the beam-type frame a as shown in FIG. 4, the second leading star of the same autonomy given to the other end Wrap b ₂
Are installed, and the installation interval is set to a size such that a large number of subsequent stirrups (not shown) can be arranged. In the drawing, the installation intervals are shown small for convenience.

In this installed state, a foot portion is provided between the first and second preceding stirrups b ₁ , b ₂ ,..., B _2, and the bottom a _{1 and the} inner side surfaces a ₂ , a ₂ of the beam form a. 6 and the side space holding portions 7 form a space corresponding to the cover thickness of the concrete.

The first and second preceding stirrups b ₁ ..., B
After installing ₂ ... to the beam-type frame a, beam-type frame a lower setup muscles in advance placed in c, the c so as to extend in the preceding stirrup b ₁ ..., b ₂ ... between, Stirrup b ₁ …,
b ₂ ... are fixed to the lower side of the lower side by a number line binding (not shown).

Further, the first and second preceding stirrups b ₁
, B ₂ , are fixed so as to straddle between the upper outer sides on both sides of the both sides by means of a number line tie (not shown).

Thereafter, a subsequent stirrup (not shown) is inserted into the beam form a between the first and second preceding stirrups b ₁ ..., B ₂ . By fixing the upper sides of both sides to the upper setup studs d, d by connecting the number lines while the sides are received by the lower setup stitches c, c, the subsequent stirrup can be fixed in an upright state. Wrap arrangements can be made.

The reinforcement of the beam stirrup is completed by sequentially repeating the reinforcement of the subsequent stirrup at a predetermined interval in the longitudinal direction of the beam form a.

After the arrangement of the bars, the upper and lower setup bars c,
c, d, and d each function as a space retainer, and a space corresponding to the cover thickness of concrete can be formed on the bottom and both sides of the subsequent stirrup.

The first and second preceding stirrups b ₁ ...
Installation of b ₂ ... in the beam form a, upper and lower setup streaks c, c,
Various operations such as mounting and fixing d and d and reinforcing bars for the subsequent stirrup can be easily performed by one worker.

After finishing the reinforcement of the beam stirrup, as shown in FIG.
All the beams are arranged by arranging the lower main muscles e ... and abdominal muscles f ... as schematically shown in FIG. 6, and then arranging the upper main muscles g ... and the cover muscles h as schematically shown in FIG. Finish the assembling work of the reinforcing bar. In addition, the reinforcing work of the upper main g
As shown schematically in FIG. 6, it is convenient to carry out the procedure in a state where the hair is temporarily staggered by a pincer i.

In the illustrated embodiment, the case where three reinforcing bar support portions are provided has been described, but at least one reinforcing bar supporting portion is provided.
It is sufficient if a book is provided.

In the case where one reinforcing bar support is provided, the connecting members 4, 4, 5, and 5 are used as members for connecting a pair of front and rear sides of the bottom gap holding / foot section 6 and the side gap holding sections 7. Works.

[0034]

According to the present invention, it is possible to easily perform the reinforcing work of the beam stirrup by the manual operation of one worker, and since the upper and lower setup streaks function as a spacing holder, the spacing can be maintained. The installation work of the tool can be omitted, and the labor required for the arrangement work of the beam stirrups as a whole and the work time can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a stirrup supporting and spacing holding metal used for carrying out the method of the present invention.

2 is a view showing one embodiment of the method of the present invention, and is a perspective view showing a state in which the first preceding stirrup is provided with independence by using the metal fitting shown in FIG. 1. FIG.

FIG. 3 is a perspective view showing a state where a lower setup bar is installed in the beam formwork.

FIG. 4 is a perspective view showing a state where first and second preceding stirrups are installed in the beam formwork.

FIG. 5 is an explanatory view schematically showing the arrangement of lower main muscles and abdominal muscles.

FIG. 6 is an explanatory diagram schematically showing the arrangement of the upper main muscles and the back muscles.

[Explanation of symbols]

 1 Reinforcing Bar Supporting Part 2 Reinforcing Bar Supporting Part 3 Reinforcing Bar Supporting Part 4 Connecting Member 5 Connecting Member 6 Feet 7 Side Spacing Holding Part 8 Cap

Claims (2)

[Claims] 1. A self-standing stirrup supporting and spacing metal fitting having first and second preceding open stirrups at one end and the other end in the longitudinal direction of a beam formwork. A step of forming a space corresponding to the thickness of the concrete cover between the bottom surface and both side surfaces of the beam formwork in a self-supporting state, using the first and the second set in the beam formwork in a self-supporting state. Fixing the lower setup bar at the lower end of the lower side of the stirrup and the upper setup bar at the upper and outer sides of both sides so as to straddle between the second preceding stirrups; After the reinforcing bars are fixed, between the first and second preceding stirrups, a plurality of succeeding stirrups having an open upper end are inserted into the beam form at intervals in the longitudinal direction of the beam form. The lower end of the stirrup was received by the lower setup streaks. A step of binding both sides to the upper setup streaks in a state to restrain the stirrup in an upright position at the insertion position. 2. A stirrup supporting and spacing metal fitting applied to the reinforcing arrangement method according to claim 1, wherein at least one front L-shaped reinforcing bar support that can be tied and fixed along a lower end corner portion of the stirrup. A bottom gap holding portion fixed to a horizontal portion at a lower end of the reinforcing bar supporting portion and allowing the reinforcing bar supporting portion to stand on the bottom surface of the beam form with an interval substantially corresponding to the cover thickness of concrete. A foot portion, and a side space holding portion fixed to the vertical portion of the reinforcing bar support portion and forming a space between the reinforcing bar supporting portion and a side portion of the beam formwork corresponding to a cover thickness of concrete. And a stirrup support and spacing metal fitting.