JP2780571B2 - Reinforcing cage construction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for building a reinforced cage, and more particularly to a reinforced basket building apparatus suitable for setting a reinforced cage in a vertical hole in a place having a limited height or a narrow work site.

[0002]

2. Description of the Related Art For example, when constructing an underground continuous wall by digging a ground below a working space below a road surface such as an elevated road or the like, since a height is limited, a heavy machine for hanging such as a crawler crane is used. There is an inconvenience that the steel cage cannot be installed in the vertical hole at one time. For this reason, the rebar cage is divided into a plurality of pieces in the longitudinal direction, and the rebar basket already inserted in the vertical hole is supported by the temporary receiving bar penetrating the upper end thereof, and the next divided rebar cage is connected to the upper end thereof. The construction method in which reinforced cages are sequentially inserted while being added has been adopted, but has the following problems.

[0003]

That is, electric hoists, chain blocks and the like have conventionally been used as a device used for building a reinforcing bar cage in a place having a height restriction of this kind. The weight of this equipment increases each time a reinforcing cage is added.Therefore, when building a reinforcing steel basket at a large depth, the total weight may exceed the limit of the capacity of the equipment. There is a problem that it is difficult to adjust the verticality at the time of refilling, and it takes a long time to perform the reloading operation, resulting in poor workability.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to make it easy to suspend and reinforce a divided reinforced cage, and to restrict the height of a place having a limited height or a narrow working site. It is also an object of the present invention to provide a reinforcing cage building apparatus capable of quickly and easily performing a setting work and also capable of accurately adding a reinforcing cage in a vertical direction.

[0005]

In order to achieve the above-mentioned object, the present invention provides an apparatus for installing a reinforcing cage in a vertical hole provided in the ground, comprising a box-shaped framework. And a main frame installed across the opening of the vertical hole, at least four telescopic jacks erected from the base of the main frame, and installed at the upper end of the telescopic jack, inside the main frame. Elevating frame having a pulley while raising and lowering, and a locking member for attaching one end to the main frame, being wound around the pulley and hanging down, and having the other end hanging a reinforcing bar cage. And a hanging member such as a chain or a wire.

[0006] The present invention is often used for the construction of a steel cage, and has high utility value. Therefore, the present invention is symbolically used as a device for building a steel cage, but other steel materials, such as H steel, etc. Can also be used as appropriate when erected.

[0007]

In the rebar cage setting device of the present invention having the above-described structure, the hanging margin of the rebar basket is always ensured by the main frame, and the rebar basket setting and extending work is performed by the work defined by the main frame. Since the work is performed in the area, the work can be performed safely without impeding surrounding existing structures and the like at the narrow working site.

Further, since the reinforcing cage to be built or extended is supported by at least four extendable jacks via the lifting frame, the amount of expansion and contraction of these extendable jacks is adjusted so that the vertical position of the reinforcing cage is adjusted. The building in the direction or the extension can be managed accurately.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 (a), 1 (b) and 1 (c) show a reinforced basket setting device according to the present invention. The construction device in the figure includes a main frame 2 installed over a vertical hole 1 for constructing a continuous underground wall, and four hydraulic jacks 3 erected from a base 2a of the main frame 2.
And an elevating frame 4 which is provided inside the main frame 2 and at the upper end of the hydraulic jack 3 and has a guide sprocket 7, and one end attached to the main frame and the guide sprocket 7
, The other end of which is suspended downward, and a chain 8 having a locking member 9 at the tip.

The main frame 2 is vertically erected on a base 2a in which a steel frame is framed in a rectangular shape in accordance with the plane length and width of the vertical hole 1 for one gut constituting the continuous underground wall, and A support frame 2b framed in a box shape by connecting its upper end to a rectangle, and a reinforcing brace 2c integrated in an x-shape on the upper and outer three surfaces of the support frame 2b, and the remaining one surface is It is an opening for receiving the reinforcing bar 6.

The lifting frame 4 is connected to the upper end of a plunger 3a projecting from the top of the hydraulic jack 3. The lifting frame 4 moves up and down between a substantially middle position and an uppermost position of the support frame 2b in accordance with the projecting stroke of the plunger 3a. I do.
1A, slits 4a are formed in parallel with the pair of frames extending in the left-right direction in FIG. 1A, and a pair of guide sprockets 7 is provided in each slit 4a. There are a total of four bearings.

A chain 8 having one end fixed to the base 2a via a fixture 8a is wound around each sprocket 7. That is, the chain 8 is hung around the lifting frame 4 through the sprocket 7, and the other end is suspended downward by the counterweight 5 without sagging.

Therefore, as a result of the chain 8 being pulled at the highest position of the lifting frame 4, the counterweight 5 is located immediately below the lifting frame 4. When the elevating frame 4 is lowered to the lowest position, that is, the intermediate position of the support frame 2b, the chain 8 is extended, and as a result, the counterweight 5 is lowered to the lower part of the support frame 2b, which is twice the stroke amount. The rebar basket 6 can be lowered to the imaginary line positions in FIGS. 1 (b) and 1 (c).

The counterweight 5 is provided with a locking member 9 made of a shackle or the like at four locations below the counterweight 5, whereby a horizontal connecting bar 6a provided on the upper part of the reinforcing bar cage 6 is locked to rebar. The basket 6 is suspended.

Next, a procedure for building a reinforcing bar cage using the reinforcing bar building apparatus having the above configuration will be described with reference to FIG.
First, the main frame 2 is positioned and installed above the excavated vertical hole 1. This movement can be easily performed by jacking up the base 2a and moving it by inserting and sliding the rollers, and when it is positioned at the target position, jacking up again and removing the rollers.

Next, the plunger 3a of the hydraulic jack 3 is extended and the lifting frame 4 is positioned at the highest position. In this state, the counterweight 5 is in contact with the lower surface of the elevating frame 4, and in this state, the first rebar cage 6 is supplied into the main frame 2 through the opening of the support frame 2b, and the upper end thereof is hooked on the locking member 9 and locked. Then, as shown in FIG. 2A, the reinforcing cage 6 can be hung inside the support frame 2a. If a forklift or the like is used to supply the reinforcing bar, fine adjustment such as positioning of the vertical position during suspension can be easily performed.

When the reinforcing cage 6 is suspended, the lifting frame 4 is lowered. And, by the lowering operation of the hydraulic jack 3,
As the lifting frame 4 descends to the intermediate position of the support frame 2b, the chain 8 is extended, and the lifting frame 4
Is lowered to the position of the stroke twice as much as that stroke, and the reinforcing bar 6 is inserted into the vertical hole 1 with the upper end slightly exposed above the opening of the vertical hole 1 as shown in FIG. Can be inserted inside. Then, in this state, a pair of temporary receiving beams 10 are inserted across the connection bar 6a just across the connecting bar 6a, and bridged over the opening surface of the vertical hole 1.
After the load of the reinforcing bar 6 is supported at 0, the locking member 9 is removed from the connecting bar 6a.

Next, when the lifting frame 4 is raised again, the next rebar cage 6 is in a standby state for receiving the next rebar cage 6, and as shown in FIG. 2C, the next rebar basket 6 can be suspended and lowered. . Fig. 2
As shown in (d), the lower end of the next rebar basket 6 overlaps the upper end of the first rebar basket 6 that has already been provisionally received. At this point, the lowering operation is temporarily stopped, and the overlapped portion is connected by welding or a coupler, etc. Before the joining of the rebar cage 6, by adjusting the amount of expansion and contraction of the four hydraulic jacks 3, The reinforcing bars 6 can be joined in the vertical direction with high accuracy by correcting the inclination in the left-right and front-back directions.

When the joining of the reinforcing cage 6 is completed, the temporary provisional receiving beam 10 is removed, and the lifting frame 4 is moved downward, as shown in FIG.
As shown in (e), the rebar cage 6 is further lowered while being connected, and is inserted into the vertical hole 1. Also in this case, by adjusting the amount of expansion and contraction of the hydraulic jack 3, the rebar cage 6 can be accurately built in the vertical direction. Then, the reinforcing rod cage 6 is set until the upper end is slightly exposed above the opening of the vertical hole 1.
Is inserted, the operation of lowering the elevating frame 4 is stopped again.

The above-mentioned work cycle is the third, fourth
By repeating the reinforcing cage 6, the reinforcing cage 6 can be built while sequentially adding up to the target depth.

In this embodiment, the case where the steel cage is built is described. However, the present invention can be similarly used when other steel materials such as H steel are built.

[0023]

As described in detail in the above embodiments, according to the reinforcing cage building apparatus of the present invention, the hanging margin of the reinforcing cage is always secured by the main frame, Since the extension work can be performed in the work area defined by the main frame, the work of laying the rebar basket can be quickly and safely performed even in a place where the height is limited or in a narrow working site.

Further, by adjusting the amount of expansion and contraction of at least four elastic jacks, it is possible to easily and accurately build a reinforcing cage in the vertical direction.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a reinforcing device for a reinforcing cage according to the present invention, and FIG. 1 (a) is a half sectional plan view. (B) is a half sectional front view. (C) is a half sectional side view.

FIGS. 2A to 2E are explanatory views showing work procedures using the built-in device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical hole 2 Main frame 3 Hydraulic jack 4 Elevating frame 5 Counter weight 6 Steel cage 7 Sprocket (pulley) 8 Chain 9 Locking member

Continuation of front page (56) References JP-A-4-140315 (JP, A) JP-A-5-214813 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 21 / 16 E04G 21/12

Claims (1)

(57) [Claims] 1. An apparatus for laying a rebar cage in a vertical hole provided in the ground, comprising a main frame which is framed in a box shape and is installed across the opening of the vertical hole, and a base of the main frame. At least four telescopic jacks erected from the portion, an elevating frame erected at the upper end of the telescopic jack, ascending and descending inside the main frame, having a pulley, and attaching one end to the main frame, A chain with a locking member for hanging a reinforcing rod cage at the other end,
An installation device for a reinforcing rod cage, comprising a hanging member such as a wire.