JPH06200619A - Connection construction between beam form and truss - Google Patents

Abstract

PURPOSE:To make it possible to bear the end of a truss on a load bearing surface having sufficient area, to make it possible to obtain sufficient bearing force of a floor slab even if an interval between beams of a concrete structure is widened and to enable the precedence demolition of a beam form. CONSTITUTION:A concrete structure is constituted of beam forms 1 arranged in parallel at an interval corresponding to the length of a truss and the truss 10 constructed between the beam forms, and a horizontally mounted piece 16 projected in excess of specific and proper size backward of the forms to be constructed by covering the upper surface of a side form 3 of the beam forms and upper surface of a waler 4 is provided to the end of the truss 10. A drawing out space B for drawing out the beam forms is provided to a downward space of the inside of the horizontally mounted piece. A projected edge section of the horizontally mounted piece 16 is buried and fixed to a concrete hardened body C placed upward of floor forms arranged to the upper surface of the truss and backward of the beam forms in a horizontal state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a beam formwork and a truss used in the construction of a concrete floor slab, and particularly to a floor slab concrete even if the beam formwork is dismantled prior to the truss. The present invention relates to a connection structure of a beam formwork and a truss capable of receiving and supporting a load of.

[0002]

2. Description of the Related Art Conventionally, when building a concrete structure, beam formworks are arranged in parallel at a predetermined interval, and a truss is placed on a span between the beam formworks to form a floor formwork. The concrete structure of the floor slab and the beam is formed by placing concrete and placing concrete.

According to this method, a required number of trusses are arranged at equal intervals between juxtaposed beam forms, and the trusses are used to support the floor form, and then the floor forms and beams are supported. This is done by placing concrete on the back of the formwork and removing the formwork after curing and curing the concrete.

On the other hand, at the construction site, there is a demand for reducing the amount of construction materials used as much as possible and rationalizing the material management, so that the dismantling work of the formwork can be disassembled as soon as possible, and other sites It is required to be provided for use in. Therefore, it is an advantageous construction method even on site management that the formwork of the part where the load is not applied can be removed in advance so that it can be diverted to the work on the upper floor, and concrete was hardened like the beam formwork. After that, it is desired to dismantle the formwork of the part where the load is not applied so much as before the formwork such as the truss.

As a method for responding to such demands on site,
For example, as described in Japanese Utility Model Publication No. 61-40842, a joint fitting in which L-shaped engaging portions that engage with the upper surface of the beam form are provided at both ends of the truss to be suspended between the beam forms. Has been proposed, and the beam form is locked to the engaging piece of the joining metal fitting.

In this method, as shown in FIG. 4, a joint fitting 31 is provided at the end of the truss 30 and is connected to the upper edge of the side formwork 3 of the beam formwork 1 through the joining fitting 31. ing. The beam formwork 1 is formed by fixing a plurality of piers 4 to the outside of the side formwork 3. The connection fitting 31 is fixed to the end plate of the truss 30 and has a downward U-shaped engaging piece 32 at the side edge portion, and the engaging piece 32 is of the side form 3 of the beam form 1. The beam form 1 is detachably formed after the concrete is cured and hardened by being hung on a part of the upper edge for engagement.

According to the connection structure of the beam form and the truss proposed above, even if the beam form 1 is removed before the truss, the downward U-shaped engaging piece 32 provided on the connecting fitting 31 is made of concrete. Since it is embedded in, the lower end surface 33 of the engagement piece 32 serves as a load supporting surface and has an effect of locking and supporting the end portion of the truss to the concrete hardened body to prevent the truss from falling. The beam formwork 1 can be disassembled in advance.

[0008]

However, in the connection structure of the beam form and the truss, the end portion of the truss has the engaging piece 32.
Since the load is supported only on a small area of the lower end surface 33 of the above, if the beam spacing is widened, it is dangerous to support the load of the truss and the floor slab above it only by the load supporting force of the above lower end surface 33. There was a problem that became.

That is, the engaging piece 32 generally has a thickness of 5 to 5.
Although it is formed by bending a 9 mm steel plate, the load supporting surface 33 obtained by such a locking piece 32 is limited by the thickness of the steel plate and can only work on the load supporting surface of about 5 to 9 mm. It was not there.

The present invention has been made in view of the above-mentioned conventional problems, and it is sufficient to widen the beam interval of the concrete structure by supporting the end portion of the truss with the load supporting surface having a sufficient area. It is an object of the present invention to provide a connection structure between a beam formwork and a truss capable of obtaining a large floor slab supporting force and capable of pre-disassembling the beam formwork.

[0011]

In order to achieve the above object, the present invention provides a beam formwork arranged in parallel at intervals according to the length of the truss, and a truss passed between the beam formwork. At the end of the truss, a horizontal mounting piece is provided, which covers the upper surface of the frame material of the beam formwork and projects behind the formwork by a predetermined size or more and is bridged. A space for extracting the beam formwork is provided in the space below the horizontal placing piece to remove the beam formwork.For the concrete hardening body placed above the floor formwork on the top of the truss and behind the beam formwork. A connecting structure of a beam form and a truss, wherein a protruding edge portion of the horizontal mounting piece is embedded and fixed in a horizontal state.

Further, in the invention of claim 2, the floor formwork is positioned by contacting a side end face of the floor formwork arranged on the upper surface of the truss with the upper face of the end of the horizontal placing piece at the end of the truss. This is a connection structure of a beam formwork and a truss, which is characterized in that rising protrusions are integrally provided.

[0013]

Therefore, according to the connecting structure of the beam form and the truss of the present invention, the end portion of the truss is covered with the upper face of the form material of the beam form so as to project to the back of the form by a predetermined size or more. Since the horizontal placing piece to be bridged is provided, the protruding dimension of the horizontal placing piece can be set to a dimension that can sufficiently support the load of the floor slab and the truss, and the protruding dimension can be freely set. All the projecting surfaces of the horizontal mounting piece are made to act on the load supporting surfaces of the truss and the floor slab so that stable supporting strength is exhibited.

Further, according to the connecting structure of the beam formwork and the truss of claim 2 of the present invention, the side of the floor formwork arranged on the upper surface of the truss is provided on the upper surface of the end of the horizontal placing piece at the end of the truss. Since the rising convex piece that contacts the end face and positions the floor formwork is integrally provided, the floor formwork to be placed above the truss is stably supported and it is possible to prevent displacement due to vibration. is there.

Further, since the above-mentioned convex piece is integrally provided above the horizontal placing piece, the convex piece acts as a reinforcing rib of the horizontal placing piece to enhance the end strength and to horizontally mount. This has the effect of preventing deformation of the piece.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a beam form and truss connection structure of the present invention will be described with reference to the drawings showing embodiments. As shown in FIGS. 1 and 2, the beam formwork 1 includes a bottom formwork 2 and a pair of side formwork 3 standing upright on both sides of the upper surface of the bottom formwork 2.
(Only one side is shown), and a plurality of piers 4 are fixed to the outside of the side frame 3 described above.

The bottom formwork 2 is supported by a pipe supporter 40. A pair of side formwork 3 is erected on the bottom formwork 2 with a space therebetween, and a separator is provided between the side formwork 3. The beam formwork 1 is assembled by connecting (not shown).

The truss 10 placed on the upper surface of the side form 3 of the beam form 1 is constructed by passing a diagonal member 13 between an upper chord member 11 and a lower chord member 12 to connect the upper and lower parts. As shown in FIG. 2, the end portion is integrally provided with an end reinforcing plate 15 having a trough-shaped supporting portion 14 having a U-shaped cross section on the upper surface, and the end surface of the end reinforcing plate 15 is inclined inward at the bottom. An extraction space B for extracting the beam form 1 is provided in the lower space inside the truss 10 by the inclined end surface 15a.

Further, a horizontal mounting piece 16 extending horizontally is integrally provided on the upper end portion of the end reinforcing plate 15, and the tip end portion of the horizontal mounting piece 16 is bent upward to be convex. Convex piece 16
a is integrally formed, and a span positioning rib 16b protruding downward is integrally provided on the lower surface side in the vicinity of the end reinforcing plate 15.

The truss 10 is pulled up above the beam formwork 1 and placed so that its horizontal mounting piece 16 covers the side formwork 3 and the beam 4 of the beam formwork 1. It By mounting the truss 10, the horizontal mounting piece 16 covers the upper surface of the beam 4 and the side frame 3 of the beam frame 1 with the side surface of the beam 4 in contact with the span positioning rib 16b. The horizontal mounting piece 16 is mounted in this manner, and the tip end portion of the horizontal mounting piece 16 is projected and stretched over the back side of the side frame 3 by a desired dimension X.

The projecting dimension X of the horizontal mounting piece 16 from the side frame 3 can be arbitrarily designed and mounted by adjusting the thickness of the pier 4. Specifically, it is placed so as to protrude by 10 or more, preferably 20 or more. Therefore, when the horizontal placement piece 16 is placed by covering the upper edge of the beam formwork 1, the floor formwork 20 such as a control panel is positioned on the upper surface of the truss 10 by the protruding piece 16a, and the floorformwork is placed. Frame 20
The end surface of the above is abutted against the convex piece 16a, and the floor formwork is prevented from being hooked and fixed on the upper surface of the truss 10 to prevent the positional deviation, thereby forming an integral floor slab support surface.

Further, since the end of the horizontal placing piece 16 forms a projecting portion having a projecting dimension X on the back side of the beam form 1, the horizontal placing piece 16 is formed by placing concrete. The end portion of the is embedded by the projecting dimension X, and is fixed in the horizontal state inside the concrete structure C by curing and hardening the concrete. Therefore, by embedding the tip of the horizontal mounting piece 16 inside the concrete structure C,
The projecting dimension X of the horizontal mounting piece 16 becomes a dimension to be embedded in concrete to form a load supporting surface of a truss or a floor slab. By extending the projecting dimension to widen the load supporting surface, the beam is supported. Even if the formwork 1 is removed and dismantled, the horizontal placement piece 16 does not fall out of the concrete hardening body under the load of the floor slab or the truss 10, and a sufficient load bearing force can be obtained.

At this time, the protruding portion at the tip of the horizontal mounting piece 16 has a projecting dimension X regardless of the thickness of the horizontal mounting piece 16 and the entire length of the horizontal mounting piece 16 and the beam form 1. Since it can be set arbitrarily according to the relationship between the total thickness of the pier 4 and the side mold 3, the projecting dimension X can be set when the beam interval is wide.
Is to be placed on a large scale.

When removing the beam form 1, the lower end of the beam form 1 is peeled off from the hardened concrete when the concrete is cured and cured to obtain a desired strength.
At this time, the beam form 1 is peeled off by rotating the upper end of the beam form 1 with the span positioning rib 16b of the horizontal mounting piece 16 as a fulcrum, and the beam form extracting space provided in the space below the truss 10 inside. It is to be removed via the portion B.

That is, the beam form 1 is peeled off along the space B for extracting the beam form and the beam form 1 is disassembled so that the truss 10 is left as it is and the beam form 1 is placed on the upper floor beam. It can be diverted to formwork installation work.

[0026]

As described above, the present invention comprises the beam formwork arranged in parallel at an interval according to the truss length and the truss passed between the beam formworks. The section is provided with a horizontal placing piece which covers the upper surface of the beam forming material of the beam formwork and projects over the back side of the formwork by a predetermined size or more and is bridged over the inside of the horizontal placing piece. There is a space for extraction to extract the beam formwork in the space,
Beam formwork and truss characterized in that the protruding edge of the horizontal mounting piece is embedded and fixed in a horizontal state in a concrete hardening body placed above the floor formwork and behind the beam formwork placed on the upper surface of the truss. Since it is a connection structure of, it is possible to set the desired load bearing area by adjusting the protruding size of the horizontal mounting piece, and to set a large embedding size in the concrete hardened body to set the large span concrete construction The floor slab can be supported with a sufficient load bearing force until the concrete has a desired strength, and the beam formwork can be dismantled in advance and safely.

Further, according to the structure of the present invention, since the end of the truss is supported by using the projecting portion of the horizontal mounting piece as the load supporting surface, it is bent downward as in the conventional proposal described above. Compared with the method of supporting the load on the end surface of the locking piece, a larger load supporting surface can be provided for construction, so the dismantling work can proceed with peace of mind.

According to the second aspect of the present invention, the floor formwork is positioned by contacting the upper end face of the horizontal mounting piece at the end of the truss with the side end face of the floor formwork arranged on the upper face of the truss. Since the rising convex piece to be performed is integrally provided, it is possible to hook and fix the end surface of the floor formwork to be arranged above the truss with the convex piece, thereby preventing the positional deviation of the floor formwork and preventing the truss. The floor formwork and the truss form an integral support surface of the concrete floor slab, and the floor formwork and the truss can maintain sufficient support strength until the concrete is cured and cured to exert sufficient strength.

Furthermore, since the above-mentioned convex piece is integrally provided on the end of the horizontal placing piece so as to project upward, it acts as a reinforcing rib for the horizontal placing piece, and is deformed by the impact or load of the horizontal placing piece. This has the advantage that the life of the truss can be extended by preventing this.

[Brief description of drawings]

FIG. 1 is a side view showing a connection structure of a beam form and a truss of the present invention,

FIG. 2 is a partially enlarged perspective view showing a connection structure of a beam form and a truss of the present invention,

FIG. 3 is a side view for explaining a state where the beam form is disassembled in the connection structure of the beam form and the truss of the present invention;

FIG. 4 is a side view illustrating a conventional beam form and truss connection structure.

[Explanation of symbols]

 1 Beam formwork 2 Bottom formwork 3 Side formwork 4 Barber 10 Truss 11 Upper chord member 12 Lower chord member 13 Diagonal member 14 Gutter-shaped support part 15 End reinforcing plate 15a Inclined end face 16 Horizontal placement piece 16a Convex piece 16b Span positioning rib 20 Floor form 40 Pipe supporter B Beam form extraction space C Concrete structure X Horizontal projection size

Claims (2)

[Claims] 1. A beam form, which is arranged in parallel at an interval according to the length of the truss, and a truss passed between the beam forms. A horizontal placing piece is provided so as to cover the upper surface of the form material and project backward from the form frame by a predetermined size or more, and to pull out the beam form into the space below the inside of the horizontal placing piece. There is a space for extracting the above, and the protruding edge of the horizontal mounting piece is embedded and fixed in a horizontal state in the concrete hardening body placed above the floor formwork on the upper surface of the truss and behind the beam formwork. The connecting structure of the beam form and the truss, which is characterized by the above. 2. The upper surface of the end of the horizontal mounting piece at the end of the truss,
2. The beam formwork and truss connection according to claim 1, wherein a rising convex piece for contacting a side end surface of the floor formwork arranged on the upper surface of the truss to position the floor formwork is integrally provided. Construction.