JPS585764B2 - Madowakutsuki Concrete Panel Seizou Yojig - Google Patents

Description

[Detailed Description of the Invention] Recently, a method of constructing a building by transporting precast concrete panels manufactured in a factory in advance to a construction site and attaching them to the side of a steel frame has been put into practical use. Precast concrete panels are becoming necessary.

The present invention relates to a jig for manufacturing a precast concrete panel with a window frame attached in advance, and uses air pressure to quickly and quickly attach an inner frame that serves as a mold for pouring concrete and holds the window frame. This was invented for the purpose of providing a jig that can reliably and efficiently manufacture concrete panels with window frames in cooperation with the outer frame.

Conventionally, in order to manufacture a panel in which a window frame 1 made of aluminum alloy or the like is surrounded by a concrete part 5 and hardened as shown in FIG.
Sandwich the window frame between the lower inner frame and upper inner frame placed on the board, surround it with the outer frame, pour concrete between the inner and outer frames and the window frame, and after the concrete hardens, insert the outer frame and Precast concrete panels with window frames were manufactured by removing the upper and lower inner frames, but in order to apply vibration during concrete pouring to allow the concrete to settle, each frame and window frame had to be placed with several tubes, for example, to prevent them from moving. A restraining beam was provided and fixed to the board with bolts to hold down the window frame, etc.

This type of bolt tightening work takes time, so assembling the inner and outer frames and the window frame before pouring concrete is time consuming and inefficient, and condensed water during concrete and concrete curing can get onto the surface of the aluminum alloy window frame. In order to avoid adhesion and roughening the surface or impairing its luster, it was necessary to apply tape to the surface of the window frame, which was a tedious task.

The jig of the present invention allows work to be carried out efficiently without such trouble.

The jig of the present invention will be described below with reference to the drawings showing examples.

The jig, which is an important part of the present invention and holds the window frame in a predetermined position, consists of an upper inner frame and a lower inner frame, which together with the window frame serve as inner molds for pouring concrete.

The structures of these jigs, window frames, etc. will be explained below in accordance with the order of joining.

First, place the lower inner frame 7 on top of the horizontally placed board 6 with the bolts 8.
and claw pieces 9 are used to tighten and fix several places.

Depending on the shape of the window frame, the claw pieces 9 may be omitted.

This bolt 8 does not need to be attached or detached for each work.

An annular concave groove is provided on the upper surface of the lower inner frame 7 over the entire circumference at the position where the window frame 1 is placed, and an annular packing 1 made of rubber or the like is provided in the groove.
0, a standing wall 7a is provided at a position inward from the packing 10, and two protrusions 11, 12 are provided on the upper and lower sides of the wall 7a.
form.

Next, the window frame 1 is placed on the lower inner frame 7 so as to match the annular packing 10.

Next, the upper inner frame 13 corresponding to the lower inner frame 7 is placed on the window frame 1 with its relative position relative to the window frame 1 determined by a plurality of alignment protrusions 15.15 formed on one side.

At this time, the annular C airtight material 16,1 provided on the lower surface of the upper inner frame
7 and 18 are window frame 1 and protrusions 11 and 12 of the inner frame of the draft, respectively.
The weeping walls 7a. A decompression chamber 14 is formed between the chambers 13a.

Next, the air inside the decompression chamber 14 is extracted by a vacuum pump 21 through a three-way valve 19 and a barometer 20 through a flexible air pipe connected to an air hole 7b provided in the vertical wall 7a.When the inside of the decompression chamber 14 becomes vacuum, the upper inner frame 13 is pressed against the lower inner frame 7 by atmospheric pressure, and the window frame 1 is firmly held between the upper and lower inner frames 7 and 13.

It can be confirmed by the barometer 20 that this holding is being carried out reliably.

A cover plate 24 is attached to the upper inner frame 13 with a plurality of screws 25 to prevent the upper inner frame 13 from deforming during handling and to prevent concrete from spilling onto the frame during concrete pouring.

Atmospheric pressure is allowed to enter below the cover plate 24 by means such as providing ventilation holes in the cover plate 24.

An outer frame 22 is attached to the substrate 6, surrounding the upper and lower inner frames and the window frame that have been combined as described above, and defining the outer peripheral surface of the panel.

Next, concrete is poured between the outer frame 22, the inner frames 7 and 13, and the window frame 1, and is vibrated with a pibrator to settle and harden the concrete.

When using steam curing to solidify concrete, 5th to 6th
As shown in the figure, a steam chamber 26 is recessed, and a substrate 6,
It is effective to insert the inner and outer frames, perform the above-mentioned assembly, vacuum suction, and pour concrete, and then apply the lid 2γ to send steam into the chamber 26.

Once the concrete 5 has hardened, the three-way valve 19 is opened to allow the interior of the decompression chamber 14 to be vented to the atmosphere, and the upper inner frame 13 can be easily removed. 6 and take out the concrete panel.

As can be seen from the above embodiments, the present invention uses atmospheric pressure to firmly connect the upper and lower inner frames 7 and 13, which are window frame fixing jigs, to hold the window frame 1.1) There is no need to tighten the beam material to the board with bolts to firmly connect the upper and lower inner frames and window frame as in the past.
The time required for attaching and detaching a large number of bolts can be saved.

2) The upper and lower inner frames and the window frame can be joined and separated very quickly and easily by removing the air from the decompression chamber 14 or by introducing atmospheric pressure or a small amount of positive pressure.

3) The airtight material 10.16 can prevent concrete from seeping onto the surface of the window frame, and since the window frame surface is surrounded by the upper and lower inner frames and the vertical wall 13a, concrete will not adhere to the exposed surface. It also prevents condensed water from adhering to the surface of the window frame during steam curing and staining it.

Therefore, the protective tape and its pasting work, which have conventionally been pasted to the surface of the window frame to protect the window frame surface, are no longer necessary.

4) Using the barometer 20, it is possible to confirm that the window frame is held securely, and the quality of the product can be made uniform.

It has great industrial effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of a window frame as a product, FIG. 2 is a plan view of the precast device excluding the cover plate 24, and FIG. 3 is an enlarged view of FIG. 4 is an enlarged sectional view taken along the line B-B in FIG. 2, FIG. 5 is a plan view showing the case where a large number of precast devices are provided, and FIG. 6 is an enlarged sectional view taken along the line C-C in FIG. 5. be. 1: window frame, 5: concrete part, 6: board, 7: lower inner frame, 13: upper inner frame, 14: decompression chamber, 20: barometer, 2
2: Outer frame.

Claims (1)

[Claims] 1. A vertical wall that forms a decompression chamber 14 by airtightly contacting the other inner frame on one or both of the lower inner frame 7 attached to the substrate inside the outer frame and the upper inner frame 13 stacked thereon. Concrete with a window frame, characterized in that the decompression chamber 14 is freely connectable to a vacuum pump, and packings for elastically holding the window frame are attached to the upper surface of the lower inner frame and the lower surface of the upper inner frame. Jig for panel manufacturing.