JP2001040761A - Thin steel sheet beam form and its support metal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the construction cost and to suppress environmental disruption by using T-shaped battens made of wood or an angular pipe in place of long battens for supporting the bottom face section of a thin steel sheet form made of a trough-like body with a nearly U-shaped cross section. SOLUTION: Since face sections 32 are erected from both side edges of a bottom face section 30 folded and formed with keystone-like waves, and the upper edges of the side face sections 32 are folded outward nearly horizontally as deck receivers 34 to integrally form a thin steel beam form made of a trough- like body with a nearly U-shaped cross section. A plurality of T-shaped battens 22 made of a square lumber or an angular pipe are arranged at a prescribed intervals below the bottom face section 30 in the width direction of the thin steel sheet beam form. A plurality of timberings 24 are erected at prescribed intervals blow the battens 22, and they are connected together to secure stability. When the battens 22 made of an angular pipe are used, they are fitted via a support metal fittings 40 made of a steel sheet. Since reinforcing pipe supports of the support metal fittings 40 can be used semipermanently in place of expensive long square lumber, the construction cost is reduced, and environmental desruction can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam form made of a thin steel plate used for forming a beam of a building having an RC structure, and a metal support for the beam form.

[0002]

2. Description of the Related Art FIG. 7 is a sectional view of a conventional plywood beam form, and FIG. 8 is a side view of a conventional plywood beam form. As shown in these figures, this plywood beam formwork includes a bottom plate 10 provided horizontally, and a pair of side plates 12, 12 provided vertically upward from both side edges of the bottom plate 10. The pair of side plates 12 are opposed to each other with an interval corresponding to the width of the bottom plate 10.

[0003] Both end edges of the bottom plate 10 and lower end edges of the side plates 12 are connected and fixed by nails (not shown) across the horizontal rail 13. A plywood 15 is installed substantially horizontally on the upper edge of the side plate 12, and the side plate 12 and the plywood 15 are connected and fixed by a nail (not shown) across the horizontal crosspiece 17. A plurality of vertical crosspieces 19 are attached to the outer surface of the side plate 12 at predetermined intervals. The upper and lower ends of the vertical pier 19 are the horizontal pier 13,
17 and bears the overload.

[0004] In this example, a separator 14 is disposed between the side plates 12 and 12 in a substantially horizontal manner in three stages, but the number of the separators 14 varies depending on the height of the beam. Both ends of the separator 14 project outward from the side plate 12, respectively.
Form ties (registered trademark) 16 are attached to both ends of the protruding separator 14. Each side plate 1
A long steel pipe reinforcing pipe (butter pipe) 18 is provided on the outer surface of each of the steel pipes 2 and 12 in the longitudinal direction.
Is fixedly fastened to the outer surface of the.

Under the bottom plate 10, a plurality of other butterfly pipes 20 are provided in parallel in the longitudinal direction, and the bottom plate 10 is reinforced by these butterfly pipes 20. A plurality of short timbers (tonbata flutter) 22 under the flutter pipe 20
Are provided at right angles to the flutter pipe 20 at predetermined intervals, and the flutter pipe 20 is supported by these fluttering butters 22.

[0006] A plurality of supports (pipe supports) 24 are erected below the tongue butter 22, and the tongue butter 22 is supported from below by these supports 24.
Horizontal connecting members 26, 26 are attached to the supports 24, 24 adjacent in the width direction and the supports 24, 24 adjacent in the longitudinal direction, and the stability of the support 24 is secured.

[0007] A basket-shaped reinforcing bar (not shown) is provided inside the plywood beam formwork, and ready-mix concrete (prepared concrete) is cast. When a ready-mixed concrete is poured into this plywood beam formwork, a large pressure due to the load of the ready-mixed concrete is applied to the bottom plate 10.

If the bottom plate 10 of the plywood beam form is supported only by the tongue flutter 22, the bottom plate 10 is damaged as shown in FIGS. Will be leaked. However, in the above case, since the bottom plate 10 is reinforced by the flap pipe 20, it is not damaged, and the ready-mixed concrete does not flow downward.

However, in the case of a plywood beam formwork, many steps and construction periods are required to assemble the bottom plate 10 and the side plates 12, and a large number of members such as the separator 14, the foam tie 16, and the butterfly pipes 18, 20 are required. A number of steps and work periods are required for mounting, and the formwork must be dismantled and removed after forming the beam, which is cumbersome and dangerous.

Therefore, the present applicant has proposed the following thin steel plate beam form as an improvement of the plywood beam form.

FIG. 11 is an explanatory view of a conventional steel sheet beam formwork proposed by the present applicant. Thin steel beam formwork
A plate-shaped bottom portion 30 made of a bent thin steel plate
And a pair of opposed plate-like side portions 32, 32 extending upward at right angles from both side edges of the bottom portion 30.
A rib 33 is provided inside or outside the side surfaces 32, 32. The upper edge portion of the side surface portion 32 is horizontally turned outward to form a deck receiver 34.

A plurality of (three in this example) long square members (flap angle) 36 are provided in the longitudinal direction at predetermined intervals below the bottom surface portion 30 of the thin steel beam formwork. Butter angle 36
Below the tongue flutter 22 are provided at predetermined intervals in a direction orthogonal to the flutter angle 36.

[0013] A plurality of shoring works 2
4 are erected at predetermined intervals, and the tongue flutter 22 is supported by a supporter 24 from below. A horizontal tie member 26 is attached between the adjacent supports 24, 24, and the adjacent supports 24 are connected to each other.
Stability is ensured.

A basket-shaped reinforcing bar (not shown) is provided inside the thin steel plate beam form, and a ready-mixed concrete is cast. When ready-mixed concrete is poured into this beam formwork, the bottom 30
Large pressure is applied to

If the bottom plate 10 of the beam form made of a thin steel plate is supported only by the tongue flutter 22, FIGS.
As a result, the bottom portion 30 is deformed as shown in FIG. However,
In the above case, since the bottom portion 30 is reinforced by the flutter angle 36, the bottom portion 30 is not deformed.

[0016]

By the way, the butter angle 36 supporting the bottom 30 of the beam form made of thin steel plate is relatively expensive because it is a long square member of about 4 m. Since the number is large, if this is not used, the construction cost can be considerably reduced.

Further, if the use of the timber such as the flutter angle 36 and the dragonfly flutter 22 can be suppressed, it should be possible to suppress the environmental destruction, particularly the destruction of the forest, and to suppress the generation of CO ₂ .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a beam form made of a thin steel plate and a support for supporting the beam form, in which square materials (wood) such as a flutter angle and a tongue flutter need not be used as much as possible. The purpose is to provide metal fittings.

[0019]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a thin steel beam form is formed of a trough having a substantially U-shaped cross section, and a bottom portion forming the bottom of the trough, A side wall portion extending upward from both side edges of the bottom portion, and a deck receiver bent outward from the upper edge of the side portion to extend outward, the bottom portion has a keystone-like wave Are bent in a state in which a series of the tops of the waves are directed in the longitudinal direction of the gutter-like body.

Further, the supporting metal fitting for the thin steel beam formwork includes a metal fitting body and a reinforcing pipe holder connected to the metal fitting body, and the metal fitting body is formed on a side surface of the thin steel beam formwork. And a protrusion that engages with the tip of the shoring. The reinforcing pipe holder directs the reinforcing pipe in the width direction of the thin steel beam formwork. As described above.

Here, the reinforcing pipe holder may be made of a pair of steel plates facing each other, and the steel plate may have a hole having a shape and a size capable of inserting and holding the reinforcing pipe. The body may be made of a steel pipe, and a hole inside the steel pipe may have a shape and a size that can insert and hold the pipe.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a thin steel beam formwork according to an embodiment of the present invention. As shown in the drawing, the thin steel beam formwork is formed of a trough-like body having a substantially U-shaped cross section, and has a bottom surface 30 forming the bottom of the gutter-like body, and an upper side from both side edges of the bottom surface 30. Side surface portion 32 formed to extend
And a deck receiver 34 that is folded back from the upper edge of the side surface portion 32 in an approximately horizontal direction to extend outward.

A keystone-shaped wave is bent on the bottom surface portion 30. The keystone-shaped wave is bent in a state in which a series of wave tops is directed in the longitudinal direction of the gutter-like body. The bottom portion 30, the side portions 32, and the deck receiver 34 are integrally formed by bending a thin steel plate. In the example of FIG. 1, the side surface portion 32 is formed of a flat steel plate. However, as illustrated in FIG. 2, the side surface portion 32 may be formed of a steel plate having a keystone wave.

A plurality of tongue flutters 22 are provided below the bottom portion 30 of the thin steel beam formwork at predetermined intervals in the width direction of the thin steel beam formwork. A plurality of shorings 24 are erected at a predetermined interval below the tongue flutter 22, a horizontal connecting member 26 is provided between adjacent shorings 24, and the adjacent shorings 24 are interconnected. And its stability has been ensured.

In the above embodiment, the bottom 30 of the beam form made of a thin steel plate is supported by the dragonfly flutter 22 made of a square material. Good. In the case of using the tongue flutter 22 made of a square pipe, it is preferable to use a support fitting as shown in FIG. 3 or 4 and attach the tongue flutter 22 made of a square pipe as shown in FIG.

In these figures, the support fitting 40 comprises a fitting main body 42 formed by processing a steel plate, and a reinforcing pipe holder 44 connected to the fitting main body 42. Fitting body 42
The engaging portion 46 which engages near the lower edge of the side portion 32 of the thin steel beam formwork, and the protrusion 4 which engages with the head of the supporter 24
8 is provided. The engaging portion 46 is formed by bending an end portion of the fitting main body 42 upward, and the protrusion 48 is formed to protrude near the center of the rear surface of the fitting main body 42. Engaging part 4
Numeral 6 has a restraining effect on horizontal swing and horizontal movement when the ready-mixed concrete is poured into the beam main body.

The reinforcing pipe holder 44 is connected to the metal fitting body 42 in such a direction that the reinforcing pipe 50 is directed in the width direction of the thin steel beam formwork. As shown in FIG. 3, the reinforcing pipe holder 44 may be formed of a pair of opposed square ring-shaped members, and this member may have a square hole large enough to insert the reinforcing pipe 50. Then, as shown in FIG.
It may have a square hole large enough to insert a zero.

In FIG. 4, reference numeral 52 denotes a fixing pin for connecting and fixing the reinforcing pipe holder 44 and the reinforcing pipe 50;
Reference numeral 54 denotes a retaining pin for preventing the fixing pin 52 from coming off. Further, the reinforcing pipe holder 44 and the reinforcing pipe 5
FIG. 6 shows the relationship among the pin 0, the fixing pin 52, and the retaining pin 54.

[0029]

According to these inventions, the reinforcing pipe, the holder and the like can be used semi-permanently, and a long and expensive square bar (flap angle) for supporting a beam form made of thin steel plate can be used. Therefore, there is an effect that the construction cost of a building constructed using the thin steel beam form can be reduced.

Further, according to these inventions, the use of wood such as flutter angle can be suppressed or eliminated, so that environmental destruction, especially destruction of forest, can be suppressed, and generation of CO ₂ can be suppressed. effective.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a thin steel beam formwork according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a steel sheet beam formwork according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a support fitting according to one embodiment of the present invention.

FIG. 4 is an explanatory view of a support fitting according to another embodiment of the present invention.

FIG. 5 is an explanatory view showing a state in which a support bracket is attached.

FIG. 6 is an explanatory view showing details in the vicinity of a support fitting;

FIG. 7 is a sectional view of a conventional plywood beam formwork.

FIG. 8 is a side view of a conventional plywood beam formwork.

FIG. 9 is an explanatory view from the front side of a plywood beam formwork with a damaged bottom plate.

FIG. 10 is an explanatory diagram from the side of a plywood beam formwork with a damaged bottom plate.

FIG. 11 is an explanatory view of a conventional thin steel plate beam formwork.

FIG. 12 is an explanatory diagram from the front side of a thin steel beam formwork with a deformed bottom surface.

FIG. 13 is an explanatory view from the side of a thin steel beam formwork with a deformed bottom surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bottom plate 12 Side plate 13 Side beam 14 Separator 16 Form tie 17 Side beam 18 Butter pipe 19 Vertical beam 20 Butter pipe 22 Tonbata 24 Shoring 26 Tether 30 Bottom part 32 Side part 33 Rib 34 Deck receiver 36 Butter angle 40 Metal support Main body 44 Reinforced pipe holder 46 Engagement part 48 Projecting body 50 Reinforced pipe 52 Fixing pin 54 Retaining pin

Claims (4)

[Claims] 1. A bottom portion comprising a gutter-like body having a substantially U-shaped cross section, forming a bottom portion of the gutter-like body, and a side portion extending upward from both side edges of the bottom surface portion. A deck receiver which is extended outwardly from an upper edge of the side portion, and a keystone-like wave is formed on the bottom portion so that a series of tops of the wave is directed in a longitudinal direction of the gutter-like body. A beam form made of a thin steel sheet, which is bent in a folded state. 2. A fitting body, comprising: a fitting body; and a reinforcing pipe holder connected to the fitting body, wherein the fitting body engages near a lower edge of a side portion of the thin steel beam formwork. And a protrusion that engages with the tip of the support, and the reinforcing pipe holder is connected to the metal fitting body so as to direct the reinforcing pipe in the width direction of the thin steel beam formwork. A support for a beam form made of thin steel plate. 3. The reinforcing pipe holder comprises a pair of opposed steel plates, each of which has a hole having a shape and a size capable of inserting and holding the reinforcing pipe. 3. A support for the beam formwork made of thin steel plate according to 2. 4. The reinforcing pipe holder is made of a steel pipe,
3. The steel pipe according to claim 2, wherein a hole inside the steel pipe has a shape and a size capable of inserting and holding the reinforcing pipe.
2. A support for a thin steel beam formwork according to item 1.