JPH05177613A - Production of planar member of concrete or the like having hollow part - Google Patents

Abstract

PURPOSE:To form a hollow part in a reinforced planar member by a method wherein a hollow part forming member formed by kneading a lost wax or the like and setting the same is provided, and concrete or the like is placed. CONSTITUTION:Skeleton members, such as vertical reinforcing bars 5 and horizontal reinforcing bars 6, are provided between a side plate 2 and a partition plate 3 or between the partition plates 3 at appropriate intervals. In a space between the skeleton members, a heating wire 8 is previously disposed upwards of a hole 13 formed in a bottom plate 1. A hollow part forming member is formed by kneading lost wax, graphite powder, or the like and setting the same. The two or more members are hung on the reinforcing bars 6 through wires. Sleeves 9, 10 for discharging the hollow part forming members 7 are respectively provided between the upper and lower hollow part forming members and under the lower hollow part forming member, and a discharge pipe 11 is also provided. Concrete or the like is placed in each shuttering, cured, and set. After that, the hollow part forming members are fused by carrying an electric current to the heating wire 8 to flow out of the shuttering through the sleeves 9, 10 to discharge through the discharge pipe 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a plate-shaped member such as concrete having a hollow portion, and in particular, a hollow portion is formed inside a floor slab or a wall plate to reduce the weight. ,
The present invention relates to a method for manufacturing a plate-shaped member such as concrete having a hollow portion that is easily transported and handled.

[0002]

2. Description of the Related Art As a conventional method for producing a plate-shaped member such as concrete, after a bone member such as a reinforcing bar is appropriately placed in a dividable mold, concrete is placed in the mold and a predetermined shape is set. It is common that the frame is divided and removed after taking out the time for hardening and solidification.

FIG. 4 shows a conventional method for producing a plate-shaped member such as concrete which is generally used.
After appropriately arranging a bone member c such as a reinforcing bar in a separable form frame composed of side plates b and pouring concrete etc. d to solidify,
The side plate b is removed to manufacture a plate-shaped member e such as concrete.

[0004]

However, a plate-shaped member such as concrete manufactured by such a conventional method for manufacturing a plate-shaped member such as concrete has the concrete or the like compacted over the entire plate-shaped member. However, it is very heavy and there are many problems in transportation and installation work, so it is difficult to manufacture a long object, and in the end, there is a problem that a predetermined structure must be formed by adding short objects. It was

The present invention has been made in view of the above circumstances, and manufactures a plate-shaped member such as concrete having a hollow portion capable of simultaneously manufacturing a plurality of long and lightweight plate-shaped members. It is intended to provide a method.

[Means for Solving the Problems] In order to achieve the above object, a method of manufacturing a plate-shaped member such as concrete having a hollow portion according to the present invention comprises a bottom plate having a plurality of holes in the length direction. On a mold having a side plate fixed in the length direction on the bottom plate, a partition plate is arranged at a predetermined interval in parallel with the side plate, and in a space surrounded by the mold frame and the partition plate, Bone members such as rebars are appropriately arranged at predetermined intervals, and then lost wax, graphite powder, etc. are kneaded in the space of the bone members and above the holes of the bottom plate so that the heating wire is built in advance. A plurality of hollow part constituting members which are solidified and melted by heating are arranged, and a sleeve is arranged below these hollow part forming members so as to communicate with the holes of the bottom plate. After placing the heating wire through it, Bottom plate, side plate, on the frame surrounded by partition plates, concrete, etc. are cast, after curing for a predetermined time to solidify, the heating wire is energized to melt the hollow part constituting member, and the sleeve and the bottom plate After flowing out of the mold through the holes, the molds are sequentially removed and taken out.

[0007]

[Operation] According to the present invention, lost wax, graphite powder, etc. are kneaded so that a heating wire is previously built in a space surrounded by a form plate composed of a bottom plate and side plates and a partition plate. After solidifying and forming, a plurality of hollow part constituting members that melt by heating are placed, concrete or the like is placed, and after curing for a predetermined time to solidify, the heating wire is energized to melt the hollow part constituting members. , Through the holes in the sleeve and the bottom plate to flow out of the mold to form a hollow portion in the plate-shaped member.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a partially cutaway side view, FIG. 2 is a partially cutaway view taken along the line AA of FIG. 1, and FIG. 3 is a partially cutout hollow manufactured by the manufacturing method of the present invention. 1 shows a plate-shaped member such as concrete having a portion. 1 is a bottom plate and 2 is a side plate on the bottom plate 1 to form a mold. 3 is a partition plate, 4 is a plate-shaped member such as concrete, 5 is a vertical rebar arranged in the plate-shaped member 4, and 6 is a horizontal rebar connected to the vertical rebar 5. Reference numeral 7 denotes a hollow portion constituting member which is formed by kneading and solidifying lost wax, graphite powder or the like so as to previously incorporate a heating wire therein. And discharging from inside the plate-shaped member through the discharging gap 11. Reference numeral 12 is a wire for suspending the hollow part constituting member 7 on the reinforcing bar 6, and 13 is a hole formed in the bottom plate 1. Reference numeral 14 is a lid member fitted into the outflow sleeve 10, 15 is a side plate supporting member, and 16 is a leg fixedly provided at the lower portion of the side plate.

When the side plates 2 are arranged and fixed on both sides of the bottom plate 1 in the longitudinal direction, and a plurality of plates are simultaneously manufactured according to the number of plate-shaped members 4 to be manufactured, a plurality of plates are provided between the side plates 2. The partition plate 3 is arranged and fixed. Next, between the side plates 2 and the partition plates 3 or between the partition plates 3, bone members such as vertical and horizontal rebars 5 and 6 are arranged at appropriate intervals, and the bottom plate 1 is placed in the space between the bone members. At a position above the hole 13 formed in
The hollow part constituting member 7 which is easily melted by heating is formed by kneading and solidifying lost wax, graphite powder or the like so as to incorporate the heating wire 8 in advance in the longitudinal direction, and in the embodiment, a plurality of wires are provided above and below the wire. It is hung on the reinforcing bar 6 via 13. In addition, outflow sleeves 9 and 10 for the hollow portion constituting member 7 are arranged between the upper and lower hollow portion constituting members 7 and below the lower hollow portion constituting member 7, respectively. Further, a discharge pipe 11 is arranged below the outflow sleeve 10, that is, below the hole 13 of the bottom plate 1. After the work up to this point is completed, concrete or the like is placed in each of the frames, cured for a predetermined time and solidified, and then the heating wire 8 is energized to melt the hollow portion constituting member 7 and the sleeves 9 and 10 are formed. After being made to flow out of the form through the, it is discharged through the discharge pipe 11. After the discharging work is completed, the form frame is appropriately removed and the plate-shaped member 4 such as concrete is taken out.

In this embodiment, the lateral side surface of the plate-shaped member 4 may be formed of the same side plate as the lengthwise side plate, or may be formed manually by a trowel or the like.
The present invention is not limited to this embodiment,
It goes without saying that the design can be changed without departing from the technical idea of the present invention.

[0011]

As described above, according to the method for producing a plate-shaped member such as concrete having a hollow portion of the present invention,
A partition plate is arranged at a predetermined interval in parallel with the side plate on a mold having a bottom plate having a plurality of holes in the length direction and a side plate fixed in the length direction on the bottom plate. In the space surrounded by the frame and the partition plate, bone members such as reinforcing bars are appropriately arranged at a predetermined interval, and then a heating wire is previously built in the space of the bone member and above the hole of the bottom plate. In this way, a plurality of hollow part constituting members that are melted by heating are formed by kneading and solidifying lost wax, graphite powder, etc., and a sleeve is arranged below these hollow part constituting members to form the bottom plate. After connecting the heating wire in the holes of the sleeve and the hole of the bottom plate, the bottom plate, the side plate, on the formwork surrounded by the partition plate, concrete, etc. are placed, After curing and solidifying for a specified time, the heating wire is energized and the hollow structure is After melting the member for use and allowing it to flow out of the mold through the holes in the sleeve and the bottom plate, the molds were sequentially removed and taken out. It has excellent effects such as being able to be manufactured.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway view taken along the line AA of FIG.

FIG. 3 is a perspective view of a plate-shaped member such as concrete having a hollow portion with a part cut away, which is manufactured by the manufacturing method of the present invention.

FIG. 4 is a schematic diagram showing an example of a conventional one.

[Explanation of symbols]

 1; Bottom plate 2; Side plate 3; Partition plate 4; Plate member 5; Vertical reinforcing bar 6; Horizontal reinforcing bar 7; Hollow part constituting member 8; Heating wire 9; 10: Outflow sleeve 11: Discharge pipe 12: Wire 13; Hole 14: Lid member 15; Side plate support material 16: Leg

Claims (1)

[Claims] 1. A partition plate is disposed on a formwork having a bottom plate having a plurality of holes in the length direction and side plates fixedly mounted on the bottom plate in the length direction, in parallel with the side plates at predetermined intervals. Then, in the space surrounded by the formwork and the partition plate, bone members such as reinforcing bars are appropriately arranged at a predetermined interval, and then in advance in the space of the bone member and above the hole of the bottom plate. A plurality of hollow part constituting members that are melted by heating are formed by kneading and solidifying lost wax, graphite powder, etc. so as to incorporate a heating wire, and a sleeve is arranged below these hollow part constituting members. Then, it is communicated with the hole of the bottom plate, and after the heating wire is arranged in the sleeve and the hole of the bottom plate so as to penetrate, on the form frame surrounded by the bottom plate, the side plates, and the partition plate, concrete, etc. After placing, curing for a predetermined time and solidifying, energize the heating wire A plate-shaped member such as concrete having a hollow portion, characterized in that the empty part constituting member is melted and allowed to flow out of the mold through the holes of the sleeve and the bottom plate, and then the mold is sequentially removed and taken out. Production method.