JPH0220267Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a concrete formwork device that is mainly suitable for construction on slopes and the like.

``Prior Art'' As one of the reinforcement works for sloped ground such as slopes, facilities such as concrete slopes are used. As formwork for constructing such concrete structures, lightweight, disposable cardboard made of waterproof and reinforced cardboard has come to be used instead of formwork boards such as metal platforms and plywood boards. Ta.

However, simple formwork boards such as cardboard have low strength, so it is necessary to use a lot of reinforcing material.
Not only does it take a great deal of time to assemble and dismantle the formwork, but it also has many problems, such as a large amount of expense for reinforcing rods and the like.

``Problems that the invention attempts to solve'' This invention improves the drawbacks of the conventional simple formwork as described above, and simplifies the formwork structure by using formwork plates that are weak in strength and can be used. The purpose of the present invention is to provide a simple formwork device that reduces the use of reinforcing materials, has high strength, is easy to handle, and can reduce construction costs.

``Means for Solving the Problems'' The present invention consists of a separator in which a wedge insertion hole and a receiving portion for a form plate are formed at the end, and a through-hole that passes through the wedge insertion hole in the separator. Spaced apart lightweight formwork plates are fitted with a horizontal section at the top end of the vertical piece, followed by a sloped section extending downwards towards the vertical piece and fitted over the top edge of the formwork plate. An upper reinforcing rod with a hook portion and a wedge insertion hole formed in the horizontal piece, a lower reinforcing rod with an L-shaped cross section and a wedge insertion hole formed in the horizontal piece, and a separator protruding from the through hole of the form board. The wedge insertion hole is inserted through the wedge insertion hole of the upper reinforcing rod and the wedge insertion hole of the lower reinforcing rod.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a separator, and its both ends are bent into a loop shape to form a wedge insertion hole 2, followed by a receiving portion 3 for a form plate formed by standing up a rod. The separator 1 is vertically connected at a required interval by connecting bars 4. Note that these upper and lower separators may be separate pieces.

Reference numeral 5 denotes a lightweight form board, which is generally made of inexpensive cardboard that may be disposable, and is treated to be water resistant with, for example, paraffin wax.
Then, each wedge insertion hole 2 of the separators 1, 1
Through-holes 6, 6 for passing through are provided vertically at required intervals, and a plurality of these through-holes 6, 6 are also opened at required intervals in the longitudinal direction of the formwork plate 5. There is.

Reference numeral 7 designates an upper reinforcing rod having a substantially L-shaped cross section, and a horizontal portion 8a is extended at the upper end of the vertical piece, and an inclined portion 8b is subsequently extended downward toward the vertical piece to form a formwork. A hook portion 8 that can be fitted is provided on the upper edge of the plate 5, and wedge insertion holes 9, 9 are formed in the horizontal piece of the hook portion 8.
6 and are provided at intervals in the longitudinal direction. In addition, 10 is a lower reinforcing rod attached along the longitudinal direction of the lower part of the formwork board 5, and is formed in a substantially L-shaped cross section, and its horizontal piece has:
Wedge insertion holes 11, 11 are provided corresponding to the wedge insertion holes 9, 9 of the upper reinforcing rod 7, and a through hole 1 passing through the wedge insertion hole portion 2 of the separator 1 is provided in the vertical piece thereof.
2 and 12 are provided.

Furthermore, 13 is a wedge rod, and the main body 13 has a length to pass through the wedge insertion holes 2, 2 of both the separators 1, 1 that protrude from the upper and lower through holes 6, 6 of the form plate 5.
A protruding piece 13b directed outward is provided at the upper end of a.

The formwork device of the present invention includes the separator 1 described above,
It is composed of a form plate 5, an upper reinforcing rod 7, a lower reinforcing rod 10, and a wedge rod 13, which are assembled by inserting the wedge insertion holes of the separators 1, 1 into the through holes 6, 6 of the form plate 5, respectively. 2, 2, and fit the hook part 8 of the upper reinforcing rod 7 to the upper edge of the formwork plate 5 to attach the upper reinforcing rod 7, and the through hole 12 of the lower reinforcing rod 10 to the formwork plate. It fits into the wedge insertion hole 2 of the separator 1 which protrudes from the through hole 6 at the lower part of the separator 5. And wedge 1
3 are inserted from above into the wedge insertion holes 9 and 11 of the upper reinforcing rod 7 and the lower reinforcing rod 10 and into the wedge insertion holes 2 and 2 of the separators 1 and 1, respectively.

In the embodiment shown in FIGS. 1 to 3, the formwork plate 5
The upper reinforcing rod 7 and the lower reinforcing rod 10 are also straight ones, but the formwork board 5 is limited to such straight ones. It's not a thing. Many concrete legal frame structures are formed in a lattice shape, and in such cases, box-shaped formwork plates are assembled and constructed. FIG. 4 shows an example of a formwork device suitable for such a case.

That is, the form plate 5 is bent to surround it in a core shape of a desired shape, and the ends are mutually connected to the wire 14 as shown in FIG.
The upper reinforcing plate 7 and the lower reinforcing plate 10 are bent in the longitudinal direction to fit the formwork plate 5 formed into a core shape. In this case, each reinforcing plate 7, 1
0, as shown in the upper row of Figure 4, with four pieces joined at each of the four corners a, a, or as shown in the lower row of Figure 4. It is preferable to form it in such a shape that it can be joined at the central portions b and b of each long side. In the latter case, the sixth
As shown in the figure, it is easy to bend the formwork plate 5 in the vertical direction at the joining point in the central part b, and therefore the formwork conforms well to the uneven slope surface. This has the advantage of being possible. In the case of the embodiment shown in FIG. 4, the same separator 1 and wedge rod 13 as in the previous embodiment can be used.

"Operation" The formwork apparatus of the present invention is constructed as described above, and after the formwork is assembled, concrete is poured between the formwork plates 5, 5. After the concrete has hardened, the wedge rod 13 is extracted by striking its protruding piece 13b, and the upper reinforcing rod 7 and the lower reinforcing rod 10 are each removed from the form board 5. Then, the form board 5 is peeled off from the concrete. Note that if a durable plywood board or the like is used for the form board 5, this can be used repeatedly. Therefore, after the formwork has been removed, both edges of the upper end of the concrete structure A have a chamfer B which is inclined by the inclined part 8b of the upper reinforcing rod 7.
will be formed.

"Effects of the Invention" As explained above, the formwork device of the present invention has a substantially L-shaped hook that fits over the upper edge of the formwork plate in a formwork using a lightweight formwork plate with low strength. An upper reinforcing plate with a section and a lower reinforcing plate formed into an approximately L-shape are joined to the top and bottom of the formwork board, and both reinforcing plates and the wedge insertion hole of the separator are connected together with a wedge rod. As a result, the formwork plates are held firmly, and the formwork plates are strongly reinforced and can sufficiently withstand the lateral pressure of poured concrete. Moreover, unlike the conventional method, a large number of batter materials can be used. There is no need to use concrete, the structure is simple, there are few applicable materials, and it is easy to transport, assemble, and dismantle, and the overall construction cost can be greatly reduced. It has many advantages, such as being able to chamfer both edges of the upper end without providing a special mold for chamfering.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing one embodiment of the device of the present invention, Fig. 2 is a side sectional view showing the same members separated, Fig. 3 is a plan view showing the same part cut away, 4
The figure is a plan view showing the construction mode of a box-shaped formwork device according to another embodiment, FIG. 5 is a side view showing the joint part of the box-type formwork shown in FIG. It is a side view which shows the state which deformed the joint part. 1...Separator, 2...Wedge insertion hole, 3...
Receiving part, 5...Form plate, 6...Through hole, 7...Upper reinforcing rod, 8...Hook part, 9...Wedge insertion hole, 10...Lower reinforcing rod, 11...Wedge insertion hole, 12...Through hole, 1
3... wedge, A... concrete, B... chamfer.

Claims (1)

[Scope of utility model registration request] A separator having a wedge insertion hole and a receiving portion for a formwork plate formed at its end, a lightweight formwork plate having vertically spaced through holes for passing through the wedge insertion hole of this separator, and a vertical piece. A horizontal part is extended at the upper end, followed by an inclined part extending downward toward the vertical piece, and a hook part that can fit the upper edge of the formwork board is provided, and a wedge insertion hole is formed in the horizontal piece. The formed upper reinforcing rod, the lower reinforcing rod having an L-shaped cross section with a wedge insertion hole formed in the horizontal piece, the wedge insertion hole of the separator protruding from the through hole of the form board, the upper reinforcing rod, and the lower reinforcing rod, respectively. A concrete formwork device comprising a wedge rod inserted through a wedge insertion hole.