JPH05214813A - Suspension jig for reinforcing cage - Google Patents

Abstract

PURPOSE:To eliminate a defect by use in terms of quality of concrete and to enable execution of repeated use. CONSTITUTION:Two horizontal members 2 and 2 are installed such that a longitudinal main reinforcing bar 3 of a reinforcing cage A is extended through a gap between the two horizontal members 2 and 2 and a distance therebetween is provided so that the horizontal members are fixable to longitudinal main reinforcing bars 3 by means of fixing nuts 5. The horizontal members 2 and 2 are intercoupled so that a distance between the horizontal members 2 and 2 is variable by means of a plurality of coupling bolts 4 and 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced cage for a reinforced cage used for suspending a reinforced cage used in the construction of continuous underground walls and foundation piles made of cast-in-place concrete for the purpose of transporting or building. Regarding the ingredients.

[0002]

2. Description of the Related Art Generally, a reinforced cage is widely used for construction of a continuous underground wall and a foundation pile made of cast-in-place concrete.

This type of rebar cage is assembled in advance to a predetermined size and is reinforced by a reinforcing metal member 11 (see FIG. 8) so as not to be deformed or the main bar displaced during handling such as transportation. . In addition, it is erected by hooking a suspension wire on the reinforcing metal object, lifted up as it is, transported to the vertical hole, and installed in the vertical hole.

[0004]

However, since the reinforcing metal member 11 is mainly made of chevron steel or the like having a wide width, the reinforcing metal member 11 interferes with the surroundings of the concrete, and the reinforcing metal member is difficult. There was a problem that defects were likely to occur due to cavities formed in the peripheral part of 11 and slime remaining (see FIG. 8).

Further, since the reinforcing metal 11 is attached to the reinforcing bar cage by welding, there is a problem that not only welding equipment is required but also the reinforcing bar cage is easily affected by welding heat. Further, the reinforcing metal 11 is embedded in the concrete, which is wasteful and uneconomical.

The present invention has been proposed in order to solve the above-mentioned conventional problems, and eliminates defects in the quality of the concrete, and makes it possible to repeatedly use the reinforcing bar without burying it together with the reinforcing bar cage. It is intended to provide a basket hanging jig.

[0007]

A jig for suspending a reinforcing bar car according to the present invention is capable of fixing two horizontal members to a vertical main bar of the reinforcing bar car by passing a vertical main bar of the cage between the horizontal members. Installed with a predetermined interval in order to
Further, the above object is achieved by connecting the horizontal members by a plurality of connecting bolts so that the distance between the horizontal members can be changed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1, FIG. 2 and FIG. 3 are a side view, a plan view and a sectional view of a reinforcing bar suspension jig 1, in which two horizontal members 2 made of channel steel are shown. , 2 extend in parallel, and a predetermined space S is provided between the left and right horizontal members 2,2 so that the longitudinal main bar 3 of the reinforcing bar car A can be passed through.
Further, a plurality of connecting bolts 4, 4 are fastened to both ends of the left and right horizontal members 2, 2.

The connecting bolts 4, 4 are horizontally fastened to both ends of the horizontal member 2 with a predetermined interval of one or two on each side.
It is designed so that the reinforcing bar 3 can be passed through. Further, the gap S between the left and right horizontal members 2, 2 can be appropriately changed according to the diameter of the vertical main bar 3. In addition, the connecting bolts 4 and 4 also serve to connect the reinforcing bar suspension 1 and the wire 8.

Further, the vertical main bar 3 passed between the left and right horizontal members 2 and 2 is tightened with fixing nuts 5 and 5 having a diameter larger than the gap S between the horizontal members 2 and 2 in the vertically penetrating portion 3a. By sandwiching the members 2 and 2 from above and below, the reinforcing bar suspension jig 1 can be fixed to the upper end of the vertical main bar 3.

Next, a method of transporting and erection of the reinforcing bar car A by the reinforcing bar suspension jig 1 having such a structure will be described.

First, the reinforcing bar suspension jig 1 is attached to the upper end of the reinforcing bar car A. When installing, first connect the left and right horizontal members 2, 2 with the vertical main bar 3 of the reinforcing bar car A in between,
Connect by 4.

Then, the fixing nuts 5 and 5 are tightened on the penetrating portions 3a and 3a of the longitudinal main bars 3 and 3, and the left and right horizontal members 2 and 2 are tightened from above and below by the fixing nuts 5 and 5 to fix the reinforcing bar suspension jig 1. It is fixed horizontally at the upper end of the longitudinal main bars 3,3. The members of the reinforcing bar suspension jig 1 are determined according to the size (especially the width) of the reinforcing bar car A, the weight and the pitch of the longitudinal main bars 3, and are attached at a required number and at predetermined intervals.

Further, the fixing nuts 5 and 5 are firmly tightened so that the reinforcing bar suspension jig 1 does not laterally shift when the reinforcing bar cage A is built up, and the left and right horizontal members 2 and 5 are fixed.
A stopper 6 for preventing the lateral displacement of the longitudinal main bars 3 may be provided on one inner side of the two.

Next, each reinforcing bar suspension jig 1 is hung on a beam member 7 suspended horizontally by a crane or the like by a wire 8 at a substantially right angle to the beam member 7 and then lifted up as it is to build a reinforcing bar cage A, and , Lift it up in the air to carry it, or build it in the vertical hole 9.

It should be noted that the vertical hole 9 in which the rebar cage A is built is deep,
If it is necessary to add the reinforcing steel cage A up and down, use the vertical hole 9
Laying platforms 10 and 10 made of H-shaped steel, etc. in parallel on both sides of, and temporarily placing both ends of the reinforcing bar hanging jig 1 on this, and using this hanging jig 1 like a so-called hairpin By doing so, the rebar cage A is suspended in the vertical hole 9. Then, a new rebar cage A is added on the rebar cage A. After the joining of the upper and lower rebar cages A is completed, the rebar hanging jig 1 as the hairpin material is removed, and the rebar cage A is hung in the vertical hole 9.

When the lifting and lowering of the reinforcing bar car A is completed, the suspending jig 1 for the added reinforcing bar car is removed and attached to the next reinforcing bar car A. The removed rebar suspension jig 1 is used repeatedly.

It should be noted that if welding is not used at all for assembling the rebar cage A and the rebars are tied together with a binding wire,
The position of the rebar can be changed to some extent even after assembly.

[0019]

Since the present invention is constructed as described above, it has the following effects.

Since no embedding reinforcement metal is used, it is possible to prevent concrete defects due to residual slime and improve concrete quality. In addition, the cost of the embedded reinforcing metal, which is generally said to have a weight ratio of 10% or more with the reinforcing bar, can be significantly reduced.

Further, there is no fear of defective welding such as cross-section loss or material change, and the labor and time of welding for attaching the metal can be reduced, and the process of assembling the reinforcing cage can be simplified.

The hanging jig can be used as a jig (commonly called kanzashi) for temporarily suspending the reinforcing bar car in the vertical hole when the vertical hole for building the reinforcing bar car is extremely deep. Extremely rational and simplified construction.

Since the spacing (S) between the horizontal members of the hanging jig can be freely changed, it can be freely used for the reinforcing bar cages having different longitudinal main bar diameters by appropriately changing the spacing (S) of the horizontal members.

Since the hanging jig is easy to attach and detach,
It can be easily removed and adjusted.

Since the hanging jig is simple and light and can be repeatedly used, it is possible to reduce the construction cost and the construction time as compared with the conventional embedded metal article due to the above-mentioned overall effect.

[Brief description of drawings]

FIG. 1 is a side view of a reinforcing bar cage hanging jig.

FIG. 2 is a plan view of a reinforcing bar cage hanging jig.

FIG. 3 is a sectional view taken along line aa of the jig for suspending the reinforcing steel cage in FIG.

FIG. 4 is a perspective view showing a mounting state of a reinforcing bar car hanging jig.

FIG. 5 is a front view showing a state in which a reinforcing bar cage is hung by a reinforcing bar cage hanging jig.

FIG. 6 is a side view of FIG.

FIG. 7 is a cross-sectional view of a vertical hole showing an installed state of a reinforcing bar cage.

FIG. 8 is a cross-sectional view showing a method for placing concrete using a conventional reinforced cage.

[Explanation of symbols]

1 ... Reinforcing bar jig, 2 ... Horizontal member, 3 ... Vertical main bar, 4 ... Connecting bolt, 5 ... Fixing nut, 6 ... Stopper, 7 ... Beam member, 8 ... Wire, 9 ... Vertical hole, 10 ... Bed, 11 ... Reinforcing hardware, A ... Reinforcing cage.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukimasa Ogihara 1-2-7 Moto-Akasaka Minato-ku, Tokyo Within Kashima Construction Co., Ltd. (72) Inventor Jun Okawa 1-2-2 Moto-Akasaka, Minato-ku, Tokyo 7 In Kashima Construction Co., Ltd. (72) Inventor Ken Kitamura 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Shinichi Nawata 520 Yokokura Nitta, Oyama City, Tochigi Prefecture Within Tokyo Steel Co., Ltd.

Claims (1)

[Claims] 1. Two horizontal members are installed with a predetermined interval so that a vertical nut of a reinforcing bar cage is passed between the horizontal members and can be fixed to the vertical main bar by a fixing nut, and A reinforcing jig for suspending a cage, wherein horizontal members are connected by a plurality of connecting bolts so that the distance between the horizontal members can be varied.