JPH04133702A - Manufacturing device for precast concrete beam member - Google Patents

Abstract

PURPOSE:To contrive a reduction of the cost of equipment and labor--saving in assembly and disassembly, by a method wherein the title device is provided with a concrete feeder moving along a longitudinal direction of a main iron reinforcing rod, a profile inner concrete shuttering and a concrete feed pipe which passes through a notched part of the center of the top of a costal iron reinforcing rod and opens into the inside of the inner concrete shuttering. CONSTITUTION:After a long-sized main iron reinforcing rod 3 and a costal iron reinforcing rod 4 are arranged between outer concrete shutterings 2, 2, a concrete feeder 6 loaded with concrete slurry 12 is moved toward the other end from one end of an outer concrete shuttering 2. Simultaneously with the above concrete slurry 12 is cast between the outer concrete shuttering 2 and an inner concrete shuttering 9 from a feed pipe 10 to a height where a top main iron reinforcing rod 3 part is exposed and the concrete slurry 12 is compacted by operating a vibrator 11. The concrete 12 in a profile is molded by placing the cocrete by moving the concrete feeder 6 extending from on end to the other end of the outer concrete shuttering, cured, hardened and a long-sized precast concrete beam member is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing a precast concrete casing member.

[Problem to be solved by the invention]

In recent years, precast concrete members have been put into practical use, in which the upper main reinforcement portion is exposed and concrete is poured into a U-shaped cross section. This beam member is not bulky, does not have excessive weight, is easy to handle, and can be easily joined to columns, floor slabs, etc., resulting in lower costs, improved workability, and safe joint strength. Equivalent performance has been recognized.

However, since conventional precast concrete beams are manufactured to order for each item, they have the disadvantage that component costs are relatively high compared to general building materials that are mass-produced.

This invention has been made in view of the above-mentioned problems. The purpose is to manufacture precast concrete beam members that can be manufactured efficiently and at low cost using a mass production method that allows long precast concrete beam members to be cut into desired lengths and used. There is a device to suggest.

[Failure to solve the problem]

The apparatus for manufacturing a precast concrete beam member according to the invention of [1) casts concrete around horizontal main reinforcements and sub-reinforcements, which have a U-shaped cross section except for the upper main reinforcement portion, and the upper end main reinforcement portion is exposed and has a U-shaped cross section. This equipment manufactures shaped precast concrete beam members, including a concrete feeder that moves along the length of the long main reinforcement, an inner formwork with a cross-sectional opening that moves along with the concrete feeder, and a concrete feeder that moves from the concrete feeder to the top center of the cost reinforcement. It is characterized by being equipped with a concrete feed pipe that passes through the notch and opens on the inner side of the inner formwork. The manufacturing device according to the invention of (2) is a pre-casting machine that has a U-shaped cross section except for the upper main reinforcing bars around the horizontal main reinforcing bars and sub-reinforcements, and concrete is poured to expose the upper main reinforcing bars and form a U-shaped cross section. A device for manufacturing concrete beam members, including a concrete feeder that moves along the length of long main reinforcements, an outer formwork and an inner formwork with a U-shaped cross section that move together with the concrete feeder, and a concrete feeder that moves along the length of the reinforcement bars. It is characterized by being equipped with a concrete feed pipe that passes through the notch and opens on the inner side of the inner formwork.

〔Example〕

FIG. 1.2 shows an embodiment of the manufacturing apparatus according to the invention (1). This equipment is a long line with a length of several hundred meters, and outer formworks 2.2 that stand upright on one horizontal floor are arranged side by side, and long main reinforcements 3 and sub-reinforcements 4 are arranged between them. It's a plot. The rib cage 4 is cut out at the center of its upper end to form a cutout 5.

A concrete feeder 6 is placed on the upper part of the outer formwork 2.2, and the feeder 6 rides on wheels 7 and is movable along a rail 8 laid on the upper end surface of the outer formwork 2. An inner formwork 9 having a U-shaped cross section is disposed below the feeder 6, and is attached to the tip of a concrete feed pipe 10 extending downward from the bottom of the feeder 6. This feed pipe 10 branches into three directions, lateral to both sides and downward, and each tip is fixed to the inner formwork 9 and opens at the inner surface thereof. Further, two vibrators 11 are attached to the outer surface of the inner formwork 9.

This device has the above configuration, and in order to manufacture beam members with this device, after arranging long main reinforcements 3 and cost reinforcements 4 between the outer formwork 2.2, concrete slurry 12 is loaded. The concrete feeder 6 is moved from one end of the outer formwork 2 to the other end. At the same time, concrete slurry 12 is injected from the feed pipe 10 to a height where the upper main reinforcing bars 3 are exposed between the outer formwork 2 and the inner formwork 9.
1 to compact it.

By moving the concrete feeder from one end of the outer formwork to the other and pouring concrete, the cross section U
A concrete IJ-) 12 of the shape is molded, cured, and hardened to obtain a long precast concrete beam member.

This is cut to any desired length and used as a precast cylindrical member of a desired length.

FIG. 3.4 shows an embodiment of the manufacturing apparatus according to the invention (2). This device is also a long line with a length of several hundred meters,
Two rails 8°8 are laid on one horizontal floor, and a concrete feeder 6 is placed on top of the rails. This concrete feeder 6 is supported by a pedestal 13 and an outer formwork 14.14 having a vertical surface fixed to both sides of the lower part of the pedestal 13, and is mounted on wheels 15 provided at the lower end of the outer formwork 14.
Can be moved along the top and without. Further, an inner formwork 9 having a cross-sectional opening shape is arranged below the feeder 6, and a concrete feed pipe 10 extending downward from the bottom of the feeder 6.
It is attached to the tip of the The ends of the feed pipe 10 branched into three directions are each fixed to the inner formwork 9 and are open on the inner surface thereof. Further, two vibrators 11 are attached to the outer surface of the inner formwork 9.

To manufacture beam members with this equipment, the rail 8 on one floor
After arranging long main reinforcements 3 and reinforcing bars 4 with a notch 5 at the center of the upper end between the rails 8 and 8, the concrete feeder 6 loaded with concrete slurry 12 is moved from one end of the rail 8 to the other end. . Concrete slurry 12 at the same time
is injected from the concrete feed pipe 10 extending downward through the notch 5 of the cost reinforcement 4 between the outer formwork 14 and the inner formwork 9 at a height where the upper end main reinforcement 3 portion is exposed. 11 to compact it.

A concrete feeder is moved from one end of the rail 8 to the other, and concrete is cast and cured to form a long beam member, which is then cut to a desired length and used.

[For production]

Both of the two beam member manufacturing apparatuses of the present invention include a concrete feeder that moves along the length direction of the main reinforcement, an inner formwork with a U-shaped cross section, and an inner surface of the inner formwork that passes through a notch at the center of the upper end of the reinforcing bars. Since it is equipped with a concrete feed pipe that opens into the concrete feed pipe, it is possible to continuously place concrete and efficiently manufacture long beam members even on long lines of several hundred meters. In addition, since the inner formwork moves along with the concrete feeder, there is no need to fix a long inner formwork along a long line, reducing equipment costs and saving labor in assembly, dismantling, etc. .

In the manufacturing device according to the invention (2), the outer formwork also moves together with the concrete feeder, so there is no need to fix a long outer formwork along a long line, which further reduces equipment costs and saves labor. can be done.

〔Effect of the invention〕

This invention is as described above, and according to this manufacturing device, long precast concrete beam members can be manufactured with high efficiency.
→) can be manufactured using relatively simple equipment, and by cutting this into a desired length, it becomes possible to obtain a desired precast concrete beam member at an extremely low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1.2 is an overall side view and longitudinal cross-sectional view showing a partial cross section of the manufacturing apparatus according to the invention (1), and FIG. ) is an overall side paternal and longitudinal cross-sectional view showing a partial cross section of the manufacturing apparatus according to the invention. 1...Horizontal floor, 2...Outer formwork, 3...Main reinforcement, 4
... Rib bars, 5... Notches in ribs, 6... Concrete feeder, 7... Wheels, 8... Rails, 9...
...Inner formwork, 10...Concrete pipe, 11...
・Vibrator-11...Concrete slurry 1
3...Pedestal, 14-...Outer formwork, 15-...Wheel.

Claims (2)

[Claims] (1) Equipment for producing precast concrete beam members with a cross-sectional shape, with the upper main reinforcement exposed, by pouring concrete around the horizontal main reinforcement and cost reinforcement, excluding the upper main reinforcement. The concrete feeder moves along the length of the long main reinforcement, the inner formwork with a cross section of ■ shape moves along with the concrete feeder, and the inner formwork passes from the concrete feeder through the notch in the center of the upper end of the reinforcing bars to the inner side of the inner formwork. An apparatus for manufacturing a precast concrete member, characterized in that it is equipped with an open concrete feed pipe. (2) Equipment for manufacturing precast concrete casings that have a cross-sectional shape with the upper end main reinforcement exposed and a cross-sectional shape by pouring concrete around the horizontal main reinforcing bars and cost reinforcements, excluding the top main reinforcing bars. A concrete feeder moves along the length of the long main reinforcement, an outer formwork and an inner formwork with a cross section of ■ shape move along with the concrete feeder, and the inner formwork passes from the concrete feeder through the notch at the center of the upper end of the reinforcement. A precast concrete mold manufacturing device characterized by being equipped with a concrete feed pipe that opens on the inner side of the frame.