KR20130001458A - Rebar jig for psm box girder mould - Google Patents

Abstract

PURPOSE: A reinforcement cage assembly line for a precast box girder is provided to easily lift up a reinforcement cage and to rapidly and safely transfer the lifted reinforcement cage to a construction site using a carrier. CONSTITUTION: A reinforcement cage assembly line for a precast box girder is composed of a center support(11) and side outer supports(12). The ends of the side outer supports are connected to both ends of the center support using hinges(13) so that the side outer supports can be folded downward. Hydraulic cylinders for folding the side outer supports are installed in butt hinges attached to the center of the bottom surface of the center support and butt hinges attached to portions of the bottom surfaces of the side outer supports where are close to the hinges.

Description

REBAR JIG FOR PSM BOX GIRDER MOULD} for precast box girder

The present invention relates to a precast box girder reinforcing bar assembly platform that is easy and easy to transport the assembled precast box girder reinforcing bar network to the box girder without borrowing the lifting means such as winch.

Precast box girders are fabricated in the order of reinforcing bars at the rebar network assembly site, moving to the box girder site, pouring concrete and curing after curing. Sheath pipes for stranded wire may be assembled in the rebar network.

Rebar mesh for precast box girders is mostly heavy, even in view of design parameters. There are also wings on both sides of the top of the rebar network. When transporting this unusually shaped reinforcing bar to the box girder, the reinforcing bar must be safely moved to prevent deformation.

As a means of transporting the reinforcing bar network assembled in the reinforcing bar to the box girder, there are tracks installed from the reinforcing bar network to the box girder and the self-propelled cranes and gantry cranes reciprocating along the tracks.

The reinforcing bar conveyer, which is a self-propelled crane and a gantry crane, has a large facility cost, and the land occupancy area and occupied space of the transport vehicle from the reinforcing bar assembly plant to the box girder manufacturing site are difficult to secure the site.

In this regard, the precast box girders in the future need to find alternatives to reduce facility costs and secure land for rebar network transportation.

As an alternative, among the reinforcing bar box girders, a track having a length leading to the box girder fabrication site is placed on both sides of the box section, which is narrower than the wing section, and the bottom of the box section is lifted on the track. By installing a rebar network carrying carrier equipped with lifting means such as lifting and lowering hydraulic jacks, it is possible to envisage a method of drastically reducing the land occupied area and occupied space of the rebar network carrying means.

The problem in this case is that both sides of the support supporting the box reinforcing bar in the rebar assembly stand are obstacles to the movement of the reinforcing bar reinforcing means. As long as this problem is not overcome, the alternative is nothing more than an unintelligible fire.

It is a main object of the present invention to provide a reinforcing bar assembly platform for precast box girders which is particularly suitable for implementing a reduction in the land occupied area and the occupying space of the reinforcing bar conveying means.

The reinforcing bar is constructed from the rebar network assembly site to the box girder production site on both sides of the box section of the reinforcing bar box for box girders, and is constructed as a rebar network assembly site equipped with a carrier equipped with a reinforcing bar network lifting means. In order to achieve the present invention, the reinforcing steel bar assembly supporting the box reinforcement network is divided into a central support for supporting the bottom portion of the box reinforcement network and the lateral support for supporting the bottom of both sides of the box reinforcement network, and at both ends of the central support The hinges are hinged so that they can be folded down, and horizontal hydraulic cylinders are installed at the bottom of both sides of the central bearing, and the end of the piston is connected to the bottom of the bearing so that the reinforcing bar can be delivered to the box girder. In this case, the hydraulic cylinder can be folded down to secure space for the impression device to be accessed. We propose a rebar mesh assembly platform for precast box girders that can be configured to easily move the lifting means when carrying rebar networks.

After assembling the reinforcing bar box girders on the reinforcing bar reinforcing bar, fold the rim with the hydraulic cylinder downwards, and the position of the rim is empty. Accordingly, the upper end of the rebar network raising means can easily approach both sides of the bottom of the rebar network to raise the rebar network, the lifted rebar network can be quickly and safely transported to the rebar network manufacturing site as a carrier.

The foldable lateral support is applied to reduce the occupied area and transport space for transporting conveyed reinforcing bar network to the box girder manufacturing site, which can drastically reduce the cost of the facility, and the site of the precast box girder site. It is also easy to secure.

1 is a partial cutaway plan view of a rebar network assembly for precast box girder according to the present invention
2 is a view seen from the direction AA line of FIG.
3 is an exemplary view of a folded state support
4 is an exemplary view when the reinforcing bar network is assembled in a state where the lateral support is deployed;
5 is an exemplary view of a state where the rebar network is lifted by the pulling means;

In FIG. 1, the reinforcing bar assembling table 10 for assembling the reinforcing bar for precast box girder is divided into a central support 11 and two side support 12. The central support 11 is a plate support for supporting the center portion of the box reinforcing network, the lateral support 12 is a plate support for supporting both sides of the box reinforcing network not supported by the central support (11). The lateral support 12 is foldable so that the divided end side is connected to the hinge 13 at both ends of the central support 11 and folded down when necessary to empty the bottom of the box reinforcing network that it was in charge of. The width of the horizontal support 12 extending horizontally from the central support 11 to the hydraulic cylinder 14 is no different from the width of the box reinforcing network pedestal of a reinforcing bar assembling stand for a precast box girder.

The hydraulic cylinder 14 is provided in the bottom surface of the rebar network assembly stand 10 at a fixed distance. The hydraulic cylinder 14 is a folding means for the deflection support 12.

In FIG. 2, a stub 15 is attached to the center of the bottom face of the central base 11, and a stub 16 is also attached to a portion close to the hinge 13 on the bottom of the lateral support 12. The rear end of the hydraulic cylinder 14 is hingedly connected to the handle 15, and the piston tip of the hydraulic cylinder 14 is hingedly connected to the handle 16. The piston can be folded down such that the lateral support 12 pivots about the hinge 13 so that it lies perpendicular to the central support 11 and is approximately perpendicular to the central support 11 about the hinge 13. Perform a range of administration.

The center stand 11 is installed on the pedestal 20 built on the ground. For reference, the width of the pedestal 20 is less than the distance between the inner side of the folded side support 12, the track 22 is placed on both sides of the pedestal 20. The track 22 is for carrying a carrier for transporting reinforcing steel bars that are laid straight up to the box girder manufacturing site.

FIG. 3 shows a state in which the hydraulic cylinder 14 is reverse driven so as to be folded down at right angles to both side bearings 12.

In FIG. 4, the lateral support 12 is deployed to align the shoulder with the central support 10 by the operation of the hydraulic cylinder 14, and the carrier 30 on which the pulling means 31 is mounted is mounted on the track 21. Assemble the reinforcing bar network 30 for box girders in the air. The pulling means 41 is a screw jack or a hydraulic jack. The central support 11 supports the center portion of the box reinforcing network, and each side support 12 supports both bottom surfaces of the box reinforcing network not occupied by the central support (11). At this time, the carrier 40 is placed in a neutral position, that is, on the track 21 between the reinforcing bar 10 and the box girder fabricator (not shown). Although the carrier 40 may be held in the area of the reinforcing bar 10, the carrier 40 may be an obstacle to the folding of the lateral support 12, but the carrier 40 may be prevented in advance. It is desirable to wait in a neutral position that does not interfere with the folding of the rim support 12.

In FIG. 5, after the reinforcing bar network 40 for the box girder is completed, the hydraulic cylinders 14 are reversely operated to fold down the lateral support 13. The fully folded lateral support 13 is approximately perpendicular to the central support 11. This enlargement of the angle of the lateral support 12 is intended to be such that it does not become an obstacle to their activities when carrying the reinforcing bar with the lifting means and carrying it to the carrier. Both sides of the box rebar network are exposed as the position where the lateral support 12 folds and stays empty. .

The carrier 40 staying at the standby position is moved under the reinforcing bar assembling table 10, and then the pulling unit 41 is operated to lift both bottom sides of the box reinforcing bar. Lift the reinforcing bar in this way and move the carrier 40 along the track 21 to the box girder workshop (not shown), and reverse the lifting device 41 to move the rebar net on the pedestal of the box girder workshop. Put it down. After finishing the rebar network unloading operation by the pulling means 41, the pulling means is completely returned, and the carrier 40 is returned to the neutral position between the reinforcing bar tm girder fabrication site, which is the standby position.

The carriers replaced by winch alternatives and self-propelled frames are so small that they are incomparable to conventional self-propelled cranes or gantry cranes, but they are not comparable to carrying rebar nets for precast box girders. The rebar network assembly platform for the precast box girder of the present invention, which is able to apply a self-supporting rebar network conveyer, which is very large in size compared to a large conveyer such as a self-propelled crane and a gantry crane, significantly reduces the installation cost of the precast box girder manufacturing facility. It is possible to install precast box girders on a small site.

10: Rebar mesh assembly stand
11: center support
12: standoff
13: hinge
14: hydraulic cylinder
15,16: Stonebird
20: pedestal
21: Orbit
30: Rebar
40: carrier
41: raising means

Claims (1)

It is divided into a central support (11) and both sides of the support (12), the split end side of each of the support (12) is connected to both ends of the central support (11) by a hinge (13) to be folded down, The hydraulic cylinder 14 for folding the lateral support to the claw 16 attached to the portion close to the hinge 13 at the bottom of the lateral support 12 and the hinge 15 attached to the center of the bottom of the central support 11 is provided. Rebar mesh assembly stand for precast box girders characterized in that the installation.

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