JPH0430280Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to a formwork fixing device for the uppermost stage of a concrete joint.

(Prior art) Conventionally, when pouring concrete with joints, all of the formwork and shoring for the concrete part that has already been poured and hardened are dismantled, and then the upper part is placed on top of the existing concrete. Formwork was added and assembled, and a new formwork was added using the same formwork without dismantling the part of the upper formwork.

(Problems to be solved by the invention) In this case, the work was not easy because the joint part of the added upper formwork was not sufficiently fixed, and extra formwork material had to be left behind. .

(Means for solving the problem) The present invention is an attempt to solve the above-mentioned problem.The present invention aims to solve the above-mentioned problem by installing a washer that holds the uppermost formwork of the concrete joint and the horizontal thick material for the formwork. The fixing metal fittings of the uppermost formwork are loosely fitted into the intermediate part between the uppermost formwork and the thick horizontal material in the formwork tightening screw that penetrates through the screw rod, and the uppermost formwork is loosely fitted into the threaded end portion of the tightening screw. The concrete joint formwork fixing device is characterized by screwing nuts for tightening the fixing metal fittings of the upper formwork. An object of the present invention is to provide a concrete joint part formwork fixing device that allows the construction of the part to look good.

(Function) In the present invention, the concrete formwork is supported by vertical and horizontal thick timbers, and a formwork tightening screw is inserted through the washer and the formwork that hold the horizontal thick timbers, and the screw rod is screwed into the screw. When assembling the formwork by tightening the washer with the attached nut, the screw of the uppermost formwork is placed between the uppermost formwork and the washer in the formwork tightening screw of the uppermost formwork at the concrete joint. At the same time as loosely fitting the fixing metal fittings, a nut for tightening the metal fitting of the uppermost formwork is screwed into the threaded end portion of the tightening screw, and the nut is tightened at the same time as the formwork is assembled, and the uppermost formwork is tightened. Press the fixing fittings to the uppermost formwork.

Therefore, after the poured concrete has hardened, the uppermost formwork is fixed to the hardened concrete part via the fixing fittings of the uppermost formwork, so supports such as washers for vertical and horizontal thick pieces and horizontal thick pieces are used. The entire structure is dismantled, the remaining formwork is removed leaving only the topmost formwork, and the upper formwork is added to and assembled into the top formwork that remains in the state before concrete pouring. be.

(Example) The present invention will be described below with reference to the illustrated embodiments.

A is the fixing metal fitting for the top formwork, and there is a long groove hole 1 on the top surface.
A flat plate part 4 having a protruding ridge 3 on the back surface extends from the outer peripheral edge of the lower end of a protruding part 2 having a trapezoidal cross section in which a ridge is bored.

As shown in FIG.
Assemble a set of two thick horizontal pipes D that intersect with each other, and insert a formwork tightening screw F between the washer E that holds the thick horizontal pipe D and the formwork B, and make them face each other. A separator H is connected between the tip cone portions G of a formwork tightening screw F fitted into a pair of inner and outer formworks, and a nut I screwed onto the screw F is tightened to assemble the formwork.

Then, in the uppermost formwork B' portion, loosely fit the long groove hole 1 of the fixing metal fitting A of the uppermost formwork into the formwork tightening screw F, and screw the same fixing metal fitting tightening nut J. Then, when assembling the formwork, tighten the nut J to tighten the fixing fitting A of the uppermost formwork to the uppermost formwork B'.

Concrete K is poured into the formwork, and after the concrete K has hardened, each of the thick pieces C, D,
Even if all washers E and nuts I are disassembled, the top formwork
B' is the fixing metal fitting A and nut J of the uppermost formwork.
It is fixed to concrete K through.

Even after all the formwork supports are dismantled in this way, the upper end formwork B' remains in the state before concrete pouring, so the upper formwork is added to the same formwork B' and assembled, and the existing concrete New concrete will be poured on top.

(Effect of the invention) As described above, according to the present invention, the formwork tightening screw used for assembling the uppermost formwork is used to loosely fit the fixing metal fittings of the uppermost formwork into the same screw rod, and the same By screwing in a fixing nut and tightening the nut, the uppermost formwork is fixed to the poured concrete via the fixing fitting, and in this way, even after all the formwork supports are dismantled, The top formwork can still be left in the state before concrete pouring, and by using the same formwork to add and assemble the upper concrete formwork, it prevents the formwork from shifting at the concrete pouring joint. A concrete frame with a good appearance was constructed.

In addition, according to the present invention, as described above, all of the formwork supports can be dismantled when pouring concrete, and all the formwork can be dismantled except for the topmost formwork, making the work simple and easy. It is done.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of the concrete pouring part formwork fixing device according to the present invention before the formwork support is removed, and Figures 2 and 3 are respectively after the formwork support has been removed. FIG. 4 is a front view of the formwork fixing fitting, FIG. 5 is a plan view thereof, and FIG. 6 is a side view thereof. A...Fixing metal fittings for the top formwork, B'...Top formwork, D...Thick side pieces, E...Washers, F...Screw rod for tightening the formwork, J...Tightening the formwork fixing metal fittings. Attachment nut.

Claims (1)

[Scope of utility model registration request] The uppermost formwork in the concrete joint part and the formwork tightening screw rod that passes through the washer that holds the thick horizontal material for the formwork are placed in the intermediate part between the uppermost formwork and the thick horizontal material. A concrete joint type, characterized in that a fixing metal fitting of the upper formwork is loosely fitted therein, and a nut for tightening the fixing metal piece of the uppermost formwork is screwed into the threaded end portion of the tightening screw. Frame fixing device.