JPH0738516Y2 - Reinforcing bar for opening - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a reinforcing bar for opening to be attached to a reinforcing bar structure when constructing a cloth foundation or the like of a building.

[Conventional technology]

An opening reinforcing bar to be attached to a conventional reinforcing bar structure will be described with reference to FIG.

FIG. 6 is a front view of a reinforcing bar structure 61 to which reinforcing openings 51 for openings are attached. In this reinforcing bar structure 61, a bottom stirrup 63 is crossed over a base stirrup bar 62, a plurality of stirrup bars 64 are erected on the bottom stirrup bar, and then a top end bar 65 is crossed over the upper end of each stirrup bar 64. Is.

Then, the stirrup 64 'that overlaps with the portion of the opening installation position B shown by the two-dot chain line in the figure in which the opening is to be provided by cutting out the foundation to provide openings such as ventilation holes and inspection holes, and the upper end streak 6 above that portion 6
After cutting and removing 5 ′ and 5 ′ at the construction site, the reinforcing bar 51 for opening is attached. The opening reinforcing bar 51 is located in the vicinity of the opening installation position B, and a substantially U-shaped reinforcing intermediate bar 52 that is laid across the end of the upper end bar 65 after cutting and the end of the stirrup bar 64 after cutting. It is composed of reinforcing ribs 53 attached between the ribs 64.

[Problems to be solved by the device]

However, in the structure as described above, after cutting the stirrup bar 64 'and the upper end streak 65' of the opening installation position B where the opening is to be installed and the upper part thereof, the reinforcing intermediate bar 52 and the respective reinforcing stirrup bars 52 are cut. Since the streaks 53 and the streaks 53 must be attached one by one, the number of man-hours for installing the reinforcing reinforcements 51 for openings is very large.

Further, because a part of the assembled reinforcing bar structure 61 is cut and the reinforcing bar 51 for opening is attached, defects such as cracks may occur in the foundation after the construction is completed due to, for example, improper mounting of the reinforcing stirrup bar 53 (forgetting to install). There is a problem that it occurs.

Therefore, a reinforcing bar for opening as disclosed in Japanese Utility Model Laid-Open No. 176526/1982 is proposed. The reinforcing bar for opening is to cut the upper end bar and the stirrup bar of the opening installation position portion of the basic reinforcing bar and attach the reinforcing bar unit thereto. The reinforcing bar unit is formed by connecting a plurality of vertical bars to a plurality of horizontal bars and further connecting a pair of diagonal bars in an inverted V shape, and is attached by being bound to the upper end bar and the lower end bar of the basic rebar.

However, in the reinforcing reinforcement for opening configured as described above, since the opening is formed in the foundation, not only the stirrup bar of the base rebar but also the upper end bar is cut off, which increases the number of construction steps. Further, the reinforcing bar unit is not bound to the stirrup bar of the basic reinforcing bar, so that there is a problem that the mounting strength of the reinforcing bar unit is reduced and the foundation cannot be reliably reinforced.

An object of the present invention is to provide a reinforcing bar for openings that can significantly reduce the number of steps for attaching reinforcing bars for openings to a reinforcing bar structure and can reliably reinforce the foundation near the openings after completion of construction.

[Means for Solving the Problems]

In the reinforcing reinforcement for opening of this invention, the bottom stirrup is laid across the base stirrup constituting a part of the base stirrup, a plurality of stirrups are erected on the lower stirrup, and the upper stirrup is attached to the plurality of stirrup. A reinforcement unit for opening that is attached to a horizontal reinforcing bar structure, and is a reinforcement unit in which each upper end of a plurality of vertical bars shorter than the stirrups and having horizontal bars at each lower end is hung and fixed to an intermediate bar. It is composed of a pair of substantially S-shaped reinforcing diagonal bars that extend horizontally in opposite directions and at the upper and lower ends of the slanted central part, and instead of the stirrups at the opening installation position of the reinforcing bar structure, the vertical bars of the reinforcing bar unit. The ends of the intermediate muscle are tied together with the stirrups located outside the opening installation position to install the reinforcing bar unit. A pair so that they face each other on the outside and form an inverted V shape. The upper ends of the reinforcing oblique bars are bound to the upper ends of the reinforcing bar structure, and the lower ends of the reinforcing oblique bars are bound to the lower ends of the reinforcing bar structure, and a pair of reinforcing oblique bars are attached.

[Action]

The reinforcing bar for opening of this invention is attached to the stirrup bar located outside the opening installation position by binding both ends of the intermediate bar of the reinforcing unit in place of the stirrup bar at the opening installation position of the reinforcing structure. The upper end of each reinforcing diagonal bar is the upper end of the reinforcing bar structure, and the lower end of each reinforcing diagonal bar is arranged so that the central portions of the pair of reinforcing diagonal bars that are inclined downward face each other on both sides outside the opening installation position. Since each of the reinforcing bars is attached to the lower end bar of the reinforcing bar structure, the reinforcing bar for opening including the reinforcing unit and the reinforcing oblique bar can be easily arranged below and around the opening installation position.

〔Example〕

An embodiment of the reinforcing bar for opening of the present invention is shown in FIG.
Description will be made with reference to (c) to FIG.

1 (a), (b), and (c) are reinforcing bars for which openings such as ventilation holes and inspection holes are to be arranged at the opening installation position A indicated by the two-dot chain line in FIG. 1 (b). It is the top view, front view, and side view of structure 1. This rebar structure 1 is fixed by bridging a base stirrup 3 to a base stirrup 2 which is buried in the ground, a lower end streak 4 is laterally spanned on the base stirrup 3, and a plurality of lower end stirs 4 are provided. After the ribs 5 are erected, the upper ribs 6 are laid across the upper ends of the ribs 5.

Next, the opening installation position A of the rebar structure 1 having such a configuration
The reinforcing bar for opening to be attached below and in the vicinity of will be described.

2 (a), (b), and (c) are a plan view, a front view, and a side view of the reinforcing unit 11 that constitutes a part of the reinforcing bar for opening. This reinforcing unit 11 fixes a plurality of vertical bars 13 shorter than the stirrups 5 of the reinforcing bar structure 1 by fixing the upper part to three intermediate bars 12, and a horizontal bar 14 is laterally attached to the lower end of each vertical bar 13. It is a cross.

3 (a) and 3 (b) are a front view and a side view of the reinforcing oblique bar 15 which constitutes the other part of the opening reinforcing bar. The reinforcing diagonal bar 15 is substantially S-shaped in which an upper end 17 and a lower end 18 of a central portion 16 which is inclined downward are extended horizontally in opposite directions.

In such a structure, the reinforcing bar structure 1 (Fig. 1 (a),
The procedure for attaching the reinforcing reinforcements for openings to (b) and (c) will be described with reference to FIGS. 4 and 5.

First, as shown in Fig. 4, after removing the stirrup 5'at the opening installation position A of the reinforcing bar structure 1, the intermediate stirrup of the reinforcing unit 11 (Figs. 2 (a), (b), (c)). Both ends of 12 are attached to the stirrups 5 located outside the opening installation position A by binding them with a binding tool (not shown) such as wire, and the reinforcing bars 13 are arranged below the opening installation position A. It should be noted that, if necessary, the lateral reinforcement 14 of the reinforcing unit 11 may be attached to the lower reinforcement 4 of the reinforcing bar structure 1 by binding it.

Then, as shown in FIG. 5, the central portion 16 of the reinforcing oblique bar 15 is
The upper ends 17 of the pair of reinforcing diagonal bars 15 are attached to the upper bars 6 of the reinforcing bar structure 1 by a binding tool (not shown) such that they are opposed to each other on both outer sides of the opening installation position A to form an inverted V shape. The lower ends 18 of the pair of reinforcing diagonal reinforcements 15 are bound to the lower end reinforcements 4 of the reinforcing bar structure 1 with a binding tool (not shown) such as wire to attach the pair of reinforcing diagonal reinforcements 15.

In this way, only the stirrup 5'at the opening installation position A of the reinforcing bar structure 1 is removed, and the reinforcing unit 11 and the reinforcing oblique bar 15 of the reinforcing bar for opening are connected to the stirrup 5, the upper end bar 6, and the lower end bar of the reinforcing bar structure 1. 4, since it can be easily arranged below and around the opening installation position A simply by binding with a binding tool such as wire, the number of steps for attaching the reinforcing reinforcement for opening to a predetermined portion of the reinforcing bar structure 1 is significantly reduced. be able to.

Further, since the reinforcement unit for opening can be configured by the unitized reinforcement unit 11 and the reinforcement diagonal bar 15, there is no mis-installation (forgetting to attach) of various rebars, and the reinforcement bar for opening is the reinforcement structure 1 Since it is tied to the stirrup 5 as well as the upper end streak 6 and the lower end streak 4, the reinforcement for the opening is firmly attached, and the foundation in the vicinity of the opening installation position A can be surely reinforced.

[Effect of device]

The reinforcing bar for opening of this invention is attached to the stirrup bar located outside the opening installation position by binding both ends of the intermediate bar of the reinforcing unit in place of the stirrup bar at the opening installation position of the reinforcing structure. The upper ends of each reinforcing diagonal bar are made the upper ends of the reinforcing bar structure so that the central portions of the pair of reinforcing diagonal bars that are inclined downwards face each other on both outsides of the opening installation position and form an inverted V shape. By binding and attaching the lower ends of the reinforcing diagonal reinforcements to the lower reinforcements of the reinforcing bar structure, it is possible to easily arrange the reinforcing reinforcements for the opening including the reinforcement unit and the reinforcing diagonal reinforcements below and around the opening installation position. Therefore, it is possible to significantly reduce the number of steps for attaching the reinforcing reinforcement for opening to a predetermined portion of the reinforcing bar structure.

Further, since the reinforcing bar for opening can be configured only by the reinforcing unit and the reinforcing oblique bar, there is no improper installation (forgetting to attach) of various reinforcing bars, and the reinforcing bar for opening is the upper end bar and the lower end bar of the reinforcing bar structure. In addition, since it is also tied to the stirrup bar, the attachment of the reinforcing bar for opening becomes firm, and the foundation after the completion of construction can be surely reinforced.

[Brief description of drawings]

1 (a) is a plan view of an example of a reinforcing bar structure to which an embodiment of the reinforcing bar for opening of the present invention is attached, FIG. 1 (b) is a front view thereof, and FIG. 1 (c) is a side view thereof. FIG. 2 (a) is a plan view of a reinforcing unit for reinforcing openings for openings, FIG. 2 (b) is a front view thereof, FIG. 2 (c) is a side view thereof, and FIG. 3 (a) is reinforcing for openings. A front view of the reinforcing oblique bar of the reinforcement, FIG. 3 (b) is a side view thereof, FIG. 4 is a front view of the reinforcing bar structure with the reinforcing unit attached, and FIG. 5 is a reinforcing bar with the reinforcing unit and the reinforcing oblique bar attached. FIG. 6 is a front view of the structure, and FIG. 6 is a front view of a conventional reinforcing bar structure to which reinforcing reinforcements for openings are attached. DESCRIPTION OF SYMBOLS 1 ... Reinforcing bar structure, 4 ... Lower end bar, 5 ... Stirrup bar, 6 ... Upper end bar, 11 ... Reinforcing unit, 12 ... Intermediate bar, 13 ... Vertical bar, 14 ... Horizontal bar, 15 ... Reinforcing oblique bar, 16 ... Central part, 17 ... top, 18 ... bottom,
A: Opening installation position

Claims (1)

[Scope of utility model registration request] 1. A reinforcing bar in which a bottom stirrup is crossed over a base stirrup constituting a part of a base streak, a plurality of stirrups are erected on the bottom stirrup, and an upper end streak is crossed over the plurality of stirrup. Reinforcement unit for opening to be attached to the structure, which is shorter than the stirrup bar and has a reinforcing unit in which each upper end of a plurality of vertical bars each having a horizontal bar crossed at each lower end is suspended and fixed to an intermediate bar, and a center inclined downward. Consisting of a pair of substantially S-shaped reinforcing oblique bars extending in the opposite direction and horizontally at the upper and lower ends of the section, instead of the stirrup at the opening installation position of the reinforcing bar structure,
While attaching the reinforcing bar unit by binding both ends of the intermediate bar to the ribs located outside the opening installation position so as to arrange the vertical bars of the reinforcing bar unit, the pair of reinforcing diagonal bars The upper ends of the pair of reinforcing oblique bars are respectively bound to the upper end bars of the reinforcing bar structure so that the downwardly inclined central portions of the pair of reinforcing oblique bars face each other outside the opening installation position to form an inverted V shape, and Reinforcing bars for opening, each of which is bound to the lower end bar of the reinforcing bar structure and attached with the pair of reinforcing diagonal bars.