JPH0665501U - Concrete beam - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] The purpose is to construct concrete beams without dismantling the frame. [Structure] A metal frame 1 having a U-shaped cross section corresponding to the outer dimensions of the beam is arranged, the end of the deck plate 3 is supported on the upper edge of the metal frame, and concrete is poured into the metal frame 1. do it,
It constitutes a concrete beam A. Since the metal frame 1 is not disassembled and is integrated with the concrete 6 to form a beam,
There is no need to dismantle the frame.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to the structure of a beam in a concrete structure.

[0002]

[Prior art]

 Conventionally, when building a concrete beam, as shown in FIG. 5, a frame 22 is assembled on a temporary support base 21 with a veneer, and the end portion of the deck plate 23 is locked and supported on the upper edge of the frame 22. Concrete is placed in the frame 22 and above the deck plate 23. Then, the frame 22 is disassembled after the concrete hardens.

[0003]

[Problems to be solved by devising]

 In the above-mentioned conventional technique, the frame 22 must be assembled on site, a specialized mold craftsman is required, and time is also required for the frame assembly. Further, the frame 22 has to be disassembled, and workability is poor.

[0004]

[Means for Solving the Problems]

 The present invention solves the above-mentioned problems by making the form of metal. That is, in the concrete beam of the present invention, a metal frame having a U-shaped cross-section corresponding to the external dimensions of the beam is arranged, and the end of the deck plate is supported on the upper edge of the metal frame. It has a structure with concrete placed inside. A through hole for inserting a separator and for draining water may be provided on both side walls of the metal frame (claim 2). Further, if a frame body for spacing control is attached between the upper edges of both side walls of the metal frame, there is no fear that the opening of the metal frame widens (claim 3). Further, in the case of a large beam or a wide beam, if the metal frame is configured by combining two L-shaped members, it is easy to carry (claim 4).

[0005]

【Example】

 In FIG. 1, a liner 2 is attached to an upper edge of a metal frame 1 having a U-shaped cross section, and an end portion of a deck plate 3 is locked and supported by the liner 2. A main bar 4 and a hoop bar 5 are arranged on the inner side of the metal frame 1, and concrete 6 is placed inside the metal frame 1 and above the deck plate 3 to form a concrete beam A. is there.

The metal frame 1 is formed by bending an iron plate that is corrugated in the shape of a square wave, and its size is adjusted to the external dimensions of the concrete beam A. Through holes 7 are formed at a predetermined interval above and below the side plates 1a. These through holes are used for inserting the separator 8 and draining water. In addition, through holes 9 are also provided in the bottom plate 1b at predetermined intervals. This through hole 9 is for driving a fixing nail 11 into a square bar (large pull) 10.

A space holding member 12 is mounted between the upper edges of both side walls 1a of the metal frame 1 at appropriate intervals, if necessary. The spacing member 12 is one in which both ends of a strip-shaped iron plate are bent to form locking pieces 12a and 12b, and the locking pieces 12a and 12b on both sides are fitted to the liner 2. It is installed. The spacing member 12 and the separator 8 prevent the metal frame 1 from opening outward during concrete pouring.

Next, a method of constructing the concrete beam A of the above embodiment will be described. As in the conventional method, the support base 13 is temporarily installed, the metal frame 1 produced in the factory is placed on the square bar 10 (which may be a pipe), and the bottom plate 1b of the metal frame 1 and the square bar 10 are fixed with the nails 11. It Next, the separator 8 is inserted and fixed between the through holes 7, 7, the liner 2 is fitted on the upper edge of the metal frame 1, and the spacing member 12 is mounted between the liners 2, 2. After that, the deck plate 3 is bridged between the adjacent metal frames 1 and 1, main bars 4 and hoop bars 5 are arranged in the metal frame, and then concrete 6 is poured. The concrete beam A of this invention can be obtained by removing the support 13 after hardening the concrete. The metal frame 1 is not removed and is integrated with concrete.

In the above description, since the deck plate 3 is supported by the metal frame 1, the deck plate 3 is supported more stably as compared with the conventional technique of supporting the veneer. Although the deck plate 3 has a structure having a truss in the drawing, it may be a flat deck and the structure of the deck plate does not matter. Further, in the above-described embodiment, since the through hole 7 is provided in the side wall 1a of the metal frame 1 and the separator 8 is inserted therethrough, the expansion of the metal frame 1 at the time of placing concrete is prevented, but the separator 8 is not always necessary. Absent.

Next, FIG. 4 shows a metal frame 1 constructed by combining a pair of frame members 14, 14 formed by bending a flat iron plate into an L shape. It is the same. Here, the bottom plate end portions of the two frame members 14 and 14 are overlapped with each other, and fixed to the square bar 10 with nails 11 at the overlapping portion. According to this embodiment, since the metal frame 1 is configured by combining the L-shaped frame members 14, it is convenient for transportation and storage of the metal frame, and is particularly suitable for a large beam or a wide beam. .

[0011]

[Effect of device]

 According to this invention, concrete is placed inside a U-shaped metal frame to form a concrete beam. Therefore, the formwork work is completed only by installing the metal frame on the temporary support, which is conventionally required. The required formworker is unnecessary. Moreover, since the metal frame is integrated with concrete to form a beam, disassembling is not necessary, and the work process is reduced and workability is improved. Also, since it is stronger than the conventional veneer formwork, the support of the deck plate is stable.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is likewise an enlarged perspective view of a metal frame.

FIG. 3 is also an enlarged perspective view of the spacing member.

FIG. 4 is a cross-sectional view showing a construction process according to another embodiment of the present invention.

FIG. 5 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Metal Frame 2 Runner 3 Deck Plate 4 Main Bar 6 Concrete 7 Through Hole 8 Separator 9 Through Hole 12 Interval Holding Member A Concrete Beam

Claims (4)

[Scope of utility model registration request] 1. A metal frame having a U-shaped cross section corresponding to the outer dimensions of a beam is arranged, an end of a deck plate is supported on an upper edge of the metal frame, and concrete is provided inside the metal frame. Concrete beam 2. The concrete beam according to claim 1, wherein through holes for inserting a separator and for draining water are provided on both side walls of the metal frame. 3. The concrete beam according to claim 1, wherein a frame body for spacing control is mounted between the upper edges of both side walls of the metal frame. 4. The concrete beam according to claim 1, wherein the metal frame is configured by combining two L-shaped members.