JPH0227001Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a suitable type for constructing walls such as slope protection works, vertical walls of waterways, walls of various buildings, etc. by pouring concrete, etc. The present invention relates to a frame unit, and particularly to a formwork unit that can be unfolded and installed from a folded state with a single touch and is rust-proofed.

[Conventional technology] When constructing walls, etc., such as slope protection works, by pouring concrete, etc., it is lightweight and easy to handle.
Formwork units made of lightweight materials such as corrugated cardboard and plastic boards have come to be used because they can be provided at low cost.

In conventional formwork units of this type, spacing members made of reinforcing bars are arranged between formwork members whose faces face each other,
The bent part formed at the end of the reinforcing bar protrudes outward from the through hole drilled in the formwork material and is received by the receiving part, and a wedge is inserted into the outwardly protruding bent part to connect it to the formwork material. The spacer was fixed with the spacer.

However, with such a structure, the formwork unit could not be folded, resulting in a bulky shape that was inconvenient to transport to the site. For this reason, it is not possible to use a formwork unit with spacing materials arranged in advance, and the work involves arranging the formwork materials on site, placing reinforcements between them and fixing them to the formwork materials. This required additional work, resulting in poor workability.

Therefore, the present applicant has proposed that, when pre-arranging the spacing material between the formwork members whose faces face each other, the reinforcing bars of the spacing material are connected through connectors made of a material that does not substantially rust, such as synthetic resin. He proposed a formwork unit that could be folded by pivotally connecting it to the formwork material, and filed an application for a utility model. (Utility Model Application No. 61-35949) According to this formwork unit, the formwork unit can be folded and is convenient for transportation, and there is no need to connect the formwork material and the spacing material on site. Moreover, the work efficiency can be improved, and what is exposed on the surface of the concrete structure is a connecting tool made of a material that does not substantially rust, such as a synthetic resin, and the spacing material made of reinforcing bars is made of concrete. Since it is not exposed on the surface of the structure, there is no need for anti-corrosion treatment after concrete is consolidated.

The connector that connects the formwork material and the spacing material includes a main body into which the end of the spacing material made of reinforcing bars is rotatably inserted, a small-diameter shaft part that is integrated with the main body, and a small-diameter shaft part that is integrated with the main body. The small-diameter shaft of the connector is inserted into the hole drilled in the formwork material, and the outside surface of the formwork protrudes from the formwork material and the stopper is integrated with the shaft. The connector and the formwork material are fixed by engaging the notch of the fixing member with the small diameter shaft portion between the enlarged portion and the enlarged portion.

By the way, in the previously filed invention, the fixing member for fixing the connector and the formwork material is formed by forming notches at a predetermined interval in the reinforcing thick material for reinforcing the formwork material, and using the notches. was engaged with the small diameter shaft portion of the connector to fix the connector and the formwork material.

However, when using the reinforcing end material as a fixing member for fixing the connecting tool and the formwork material, the end material must be specially processed (a notch that engages with the small diameter shaft of the connecting tool). Furthermore, there are disadvantages in that only rounded timbers that have undergone this processing can be used.Furthermore, there are many non-standard dimensions that occur on site, and if rounded timbers are standardized, there will be places where they cannot be used (especially short ones). (If you get tired).

[Problems to be solved by the invention] The present invention was made in order to eliminate the above-mentioned drawbacks of the previously proposed invention, and its purpose is to solve the problem that it is necessary to perform special processing on the reinforcing end pieces. Without,
It is also an object of the present invention to provide a formwork unit that allows the use of non-standard off-cut materials depending on the site situation.

[Means for Solving the Problem] Therefore, according to the present invention, a fixing member for fixing the formwork material and the connecting tool and a reinforcing end piece are separated, and the fixing member also fixes the formwork material. and a connecting tool, and the fixing member is made to have a function as a receiving metal fitting for supporting the end piece. For this purpose, the fixing member has a bent side surface having a vertical part, then a horizontal part, and then a vertical part, and has a notch on the underside of one vertical part that engages with the small diameter shaft part of the coupling. The reinforcing end piece is supported by the outer surface of the formwork material, the horizontal portion, and the vertical portion.

[Operation and effect of the invention] By separating the fixing device for fixing the formwork material and the connecting tool from the reinforcing end material, there is no need to perform special processing on the end material, and it can be used as a regular method. It is possible to use square pipes, etc., or to use wood or reinforcing bars used at the site as long as the dimensions match. Furthermore, as mentioned above, non-standard dimensions often occur on site, but such cases can be easily dealt with by cutting reinforcing bars that fit the fixture. Further, since the shape of the fixing tool is a bent side surface having a vertical section, a horizontal section, and a vertical section, the end piece can be easily set and removed by simply inserting it from the top.

[Examples] Examples of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show the entire formwork unit according to an embodiment of the present invention, and formwork members 1 and 1 are made of formwork members, for example, corrugated boards, with their surfaces facing each other, and a gap is maintained between them by reinforcing bars. The formwork materials 1, 1 and the spacing material 2 are connected to a connecting tool 3, which will be described later.
and are connected using fixtures 4 so that they can be unfolded and installed from the folded state shown in FIG. 2 to the state shown in FIG. On the outer surface of the formwork materials 1, 1, reinforcing thick material 5 extending in the longitudinal direction of the formworks 1, 1 is provided.
is provided, and this end piece 5 is supported by a fixture 4 in a manner described later.

The spacing member 2 is made up of horizontal reinforcing bars 6 and vertical reinforcing bars 7, which are welded at their intersections and assembled into a cross-shaped structure. Both ends of the horizontal reinforcing bar 6 are vertically bent into an L-shape to form a bent portion 6a (FIG. 3).

A connecting rod 8 is provided that interconnects vertical reinforcing bars 7, 7 located diagonally when the formwork unit is expanded as shown in FIG. Fix it.

FIGS. 3 and 4 show details of the assembly of the formwork unit.
A main body part 10 in which a hole 9 is formed into which the part a is rotatably inserted, a small diameter shaft part 11 integrated with the main body part 10, and a retaining enlarged part integrated with the small diameter shaft part 11. 12, and the entire structure is made of materials that do not substantially rust, such as synthetic resin, wood, and concrete. The small-diameter shaft portion 11 of the connector 3 is inserted into the hole 13 made in the formwork material 1, and a fixture generally indicated by 4 is engaged with the small-diameter shaft portion 11 protruding from the hole 13. The formwork material 1 is fixed.

By using the connector 3 that does not substantially rust in this way, the reinforcing bars are not exposed on the concrete surface, and therefore there is no need to perform anti-corrosion treatment after the concrete is consolidated.

The fixing device 4 has a bent side surface having a vertical portion 14, a horizontal portion 15, and a vertical portion 16, and the small diameter shaft portion 11 of the coupling device 3 and the small diameter shaft portion 11 of the coupling device 3 are located below one vertical portion 16. An engaging notch 17 is formed. Further, the upper and lower end portions of the vertical portions 14 and 16 are slightly bent to facilitate insertion of the reinforcing thick end material 5.

Therefore, by passing the small diameter shaft portion 11 of the connector 3 through the hole 13 made in the formwork material 1 and engaging the notch 17 of the fixture 4 with the small diameter shaft portion 11 protruding from the hole 13, it is prevented from coming off. Enlarged portion 12 and this fixture 4
The connector 3 and the formwork material 1 are fixed by this.

The reinforcing end material 5 is made of a normal square pipe, and is inserted from the top of the fixture 4 to form the formwork material 1.
and the vertical part 14 and horizontal part 1 of the fixture 4
Supported by 5.

By making the fixture 4 that fixes the connector 3 and the formwork material 1 and the reinforcing thick material 5 as separate materials in this way, non-standard material can be used as the thick material. Thus, the above-mentioned excellent effects can be achieved.

When dismantling the formwork after mortar or concrete spraying or pouring, reinforcing thick timbers 5,
Fixing fixtures 4 may be removed in this order, but if the fixture 4 is hit with a hammer or the like, the small diameter shaft portion 11 of the connecting fixture 3 will break from the concrete surface due to the impact, and at the same time, the formwork material 1, fixture 4, and ends will be removed. The thick timbers 5 can be removed at once, greatly improving the efficiency of demolition work.

[Brief explanation of the drawing]

1 and 2 show a formwork unit according to an embodiment of the present invention, FIG. 1 is a perspective view of the formwork unit in an expanded state, and FIG. 2 is a perspective view of the formwork unit in a folded state. Figures 3 and 4 show details of how the formwork unit is assembled, and Figure 3 is a perspective view;
FIG. 4 is a sectional view showing a part of FIG. 3 in plan view. 1... Formwork material, 2... Spacing material, 3... Connecting tool, 4... Fixing tool, 5... Reinforcing thick material.

Claims (1)

[Scope of utility model registration request] A spacing material made of reinforcing bars is arranged between the formwork materials whose surfaces face each other, and the ends of the spacing material are rotatably connected to the formwork material, and the formwork material is unfolded from the folded state. In the formwork unit that can be installed,
The spacing member is adapted to be connected to the formwork material via a coupling made of a substantially rust-free material, into which the end of the spacing member is rotatably inserted. The main body part has a hole formed therein, a small diameter shaft part integrated with the main body part, and a retaining enlarged part integrated with the small diameter shaft part, and the small diameter shaft part is attached to the formwork. The connector is inserted into a hole drilled in the material, and a fixing device engages with the small diameter shaft of the connector that protrudes from the hole drilled in the formwork material, thereby fixing the connector and the formwork material. The fixing device has a bent side surface having a vertical portion, a horizontal portion, and a vertical portion, and the small diameter shaft of the coupling device is located below one of the vertical portions. What is claimed is: 1. A formwork unit characterized in that a notch is formed to engage with the part of the formwork, and a reinforcing end piece is supported by the outer surface, horizontal part, and vertical part of the formwork material.