JPS6117640A - Formwork for constructing reinforced concrete structure - Google Patents

Abstract

PURPOSE:To make easier the operations of correcting top end and inside dimensions by a method in which a leveling and width-regulating frame is supported on level-regulating bolts projected from the upper end of a reinforcing bar cage, and metal nets are held downwards on both sides of the frame and connected with each other. CONSTITUTION:Plural level-regulating bolts 2 are projected from the upper end of a reinforcing iron bar cage 1 in underground beams or retaining wall. A level-regulating frame 8 consisting of connectors 10 capable of freely regulating the width of concrete placed and liners 9 is provided to the bolts 2 in a vertically movable manner. A metal net 17 is hung down from the liners 9 of the frame 8, and clamp bolts 21 are inserted into the spaces between plural batters on the outside of the metal nets 17. Operations of correcting inside dimensions and leveling top end after the assembly of the formwork can be made easier.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to formwork for constructing reinforced concrete structures such as underground beams, retaining walls, and continuous underground walls.

[Problems with conventional technology]

For example, when creating underground beams, it is necessary to construct formwork, but conventional formwork of this kind is often constructed from wooden panels and many other pieces of timber, and generally requires assembly and dismantling work. It was extremely troublesome. In addition, once the conventional formwork is assembled, it is impossible to change or modify the internal width or height of the formwork after casting, so it is necessary to process and assemble the formwork accurately. , a considerable amount of skill was required to assemble the formwork.

Furthermore, leveling the upper end of a reinforced concrete structure was a relatively troublesome task.

[Purpose of the invention]

This invention was proposed in order to solve the above-mentioned problems of the conventional art, and allows for extremely easy assembly and disassembly.
Moreover, you can freely change the dimensions of the inside of the formwork after assembling the formwork.
Another object of the present invention is to provide a formwork for constructing a reinforced concrete structure whose top can be easily leveled.

[Structure of the invention]

In this invention, a plurality of level adjustment bolts are provided directly above the reinforcing bars, a telescopic level adjustment frame is installed between the level adjustment bolts so as to be movable up and down, and the reinforcing bars are inserted from both sides of the level adjustment frame. The above purpose was achieved by installing a wire mesh vertically on the outside of the gate, placing a plurality of thick end materials on the outside of the wire mesh, and inserting tightening bolts between the left and right end materials to assemble the formwork. It is something to be achieved.

〔Example〕

The present invention will be described below with reference to an illustrated embodiment. A plurality of level adjustment bolts 2, 2 are attached to the upper end of an underground beam reinforcing bar 1.

A male threaded portion 3 is formed over a predetermined length at the upper end of the level adjustment bolt 2, and a jaw portion 4 is formed at the center by bending this portion into a substantially arc shape.

-F, hook the jaws 4 of the level adjustment bolt 2 onto the left and right upper end reinforcements 5, 5 of the underground beam reinforcing bars 1, and then hook the lower end of the level adjustment bolt 2 onto the underground beam reinforcing bars 1. A binding wire 7 is installed along the ribs 6 and is attached to the upper reinforcement 5 and the ribs 6.
It is fixed by tightening it. Figure 6 shows a modification of the length of the level adjustment bolt 2, in which a hook 11 is formed at the lower end of the level adjustment bolt 2, and the level adjustment bolt 2 is fixed by hooking this hook 11 onto the ribs 6. It made it possible.

A level adjustment frame 8 is installed between the level adjustment bolts 2, 2, extending in the longitudinal direction of the underground beam reinforcing bars 1.

The level adjustment frame 8 is constructed by arranging two liners 9°9 parallel to each other, and installing a plurality of connecting members 10 between the liners 9 at regular intervals in the longitudinal direction of the liners 9. has been done.

The liner 9 is made of wooden square timber, steel square pipe, or angle iron (No. 1.2, 4, 5, 6).
,7.,11.See Figure 12).

The left and right liners 9, 9 are formed with hooks 11 or engagement grooves 12 for suspending a wire mesh (described later) (see Figures 1, 2, 6, 11, and 12).

The liner 90 is made of wooden square timber, and the hook 11 is made of a nail bent into a U-shape, and the liner 90 is made of angle iron.
The hook 11 is made by cutting a part of the liner 9 into an abbreviated shape, or by separately forming a hook metal fitting 11 a, and fitting the hook metal fitting 11 a into a hole 9 a previously formed in the liner 9. (first, second,
(See Figure 6゜11.12).

The connecting member IO is made of wooden square timber, channel steel, Z-beam steel, or steel strip, and is connected to the left and right liners 9, 9 by nailing, screwing, welding, or clips 18 (first, second, and fourth degrees). (See Figure 7.8.10).

A connecting member 10 made of channel steel or Z-shape steel slidably holds together two steel shapes with different cross-sectional sizes, and inserts adjustment bolts 13 into bolt insertion holes 14, 14, which will be described later. It is configured to be expandable and contractible,
As a result, the width of the level adjustment frame 8 can be adjusted and changed.

In addition, the connecting member 10 made of steel strips is also configured to slidably hold two steel strips together, and connect both steel strips to a connecting ring 12.
(off, see Figure 10),
It can be expanded and contracted like a connecting member made of channel steel or the like.

Bolt insertion holes 14 , 14 or two bolt insertion slits 15 , 15 are formed in the connecting member 10 , and the male threaded portions of the level adjustment bolts 2 , 2 are inserted into the bolt insertion holes 14 , 14 or bolt insertion slits 15 , 15 . 3.
3 is inserted therethrough, and level adjustment nuts (16), 16 are screwed onto the lower and upper sides of the connecting member 10 of the male threaded portions 3, 3, respectively.

By rotating the level adjustment levers 16 and moving them up and down appropriately, the height of the level adjustment frame 8 can be changed and the level can be adjusted freely.

On the left and right liners 9, 9 of the level adjustment frame 8, wire meshes 17, 17 such as lath wire meshes are vertically installed at a predetermined distance apart from the underground beam reinforcing bars 1.

Left and right wire mesh 17, 17 are hooks 1 of left and right liners 9, 9
(See figure M'2.6).
.

Further, on the left and right liners 9, 9, thick shaft members 19, 19 made of shaped steel such as angle iron or channel steel are hung vertically at regular intervals in the longitudinal direction of the liner 99, and further outside thereof are made of steel pipes, etc. A plurality of end pieces 20° 20 are installed horizontally along the longitudinal direction of the liners 9, 9, and left and right end pieces 19,
19 and 20, 20 are fixed by inserting a plurality of tightening bolts 21, 21 between them, and as a result, the left and right wire meshes 17, 17 are fixed to both sides of the underground beam reinforcing bars 1.

The left and right wire meshes 17 and 17 are integrated with the concrete filled between the wire meshes 17 and 17 to serve as surface reinforcement for the underground beams, and the left and right end thick members 19 and 20 are removed. Further, in the embodiment, the formwork for underground beams has been described, but the formwork for retaining walls and underground continuous walls shall be assembled with a similar structure.

〔Effect of the invention〕

It goes without saying that the formwork of the present invention can be assembled and dismantled very easily, and after assembling the formwork, the internal width and height of the formwork can be adjusted as necessary. You can freely change and modify it. Furthermore, by appropriately moving the level adjustment frame up and down, the top can be leveled very easily.

[Brief explanation of drawings]

Figures 1 and 4 are partially cutaway perspective views showing the formwork assembled, Figures 2 and 3 are partial side views of the formwork showing the height adjustment bolts installed, and Figure 5. , Fig. 6 is a partial side view of the formwork showing the installed state of the thick vertical timber and wire mesh, and the off view, Fig. 8, Fig. 9, and Fig. 10 are part of the formwork showing the configuration of the connecting members. 11 and 12 are partial perspective views of the formwork showing the shape of the hook. 1...Underground beam reinforcing cage, 2...Level adjustment bolt, 3...Male thread part, 4...
Jaw region, 5...superior muscle, 6...costal muscle, 7
... Binding wire, 8 ... Level adjustment frame, 9 ... Liner, 10 ... Connection member, 11 ... Hook, 12. ...Connection ring, 13...Adjustment bolt, 14...Bolt insertion hole, 15...Bolt insertion slit, 16.
...Level adjustment nut, 17...Wire mesh,
1ε...Clip, 19, 20...
2 pieces of thick timber...Tightening bolts. Figure 2 413 Figure 8 Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] A plurality of level adjustment bolts are provided directly above the upper end of the reinforcing bar cage, and a telescopic level adjustment frame is installed between the level adjustment bolts so as to be movable up and down. For constructing a reinforced concrete structure, characterized in that a wire mesh is hung vertically on both sides of the wire mesh, a plurality of end pieces are arranged outside the wire mesh, and tightening bolts are inserted between the left and right end members. Formwork.