JPH0220269Y2 - - 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 form boards such as cardboard,
Since the strength is weak, it is necessary to use a lot of reinforcing materials, which not only requires a lot of effort to assemble and dismantle the formwork, but also has many problems such as the cost of reinforcing materials and other materials is large. was.

``Problems to be solved by the invention'' This invention improves the shortcomings of the conventional simple formwork as described above, and simplifies the formwork structure by using weak and disposable formwork plates. The present invention aims 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 problem" The formwork device of the present invention bends the end inward to form a hook, and further bends the inner end of the hook to form a receiving part for the formwork plate. A separator having a separator formed therein, a form plate provided with through holes for passing the hook portions of the separator at intervals in the vertical and longitudinal directions, and an upper end edge of the form plate is fitted into the upper end portion of the separator. An upper reinforcing rod that forms a hanging part and is provided with an engaging piece that is inserted between the hook part of the separator and the outside surface of the formwork plate, and a vertical part that forms a part between the hook part of the separator and the outside surface of the formwork board. It is characterized by a lower reinforcing rod having an L-shaped cross section and provided with an engaging piece to be inserted into the rod.

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

In the figure, 1 is a separator, and hooks 3 are bent inwardly into a U-shape at both ends of a horizontally long rod 2.
Following this, the terminal portion is bent to form the receiving portion 4 of the frame plate. The separators 1 are vertically connected to each other by connecting bars 5 at a required interval. Note that these upper and lower separators 1, 1 may be provided as separate pieces.

Reference numeral 6 denotes a form board, which is generally made of disposable, lightweight and inexpensive cardboard, and is treated with water-resistance, for example, with paraffin wax. Further, a plywood board or a plastic board can also be used as the formwork board 6. The form plate 6 is provided with through holes 7, 7 vertically spaced apart from each other through the hooks 2 of the separators 1, 1, and these through holes 7, 7 A plurality of holes are also provided at required intervals in the longitudinal direction of the frame plate 6.

Reference numeral 8 denotes an upper reinforcing rod, and the upper end of the strip plate is bent into a U-shape to form a hanging portion 9 into which the upper edge of the form plate 6 is fitted. Frame board 6
A wavy engagement piece 10 bent in several steps in the vertical direction is inserted between the hook portion 3 of the separator 1 and the outer surface of the formwork plate 6 at a position corresponding to the through-holes 7, 7. Further, a horizontal projecting piece 11 formed by cutting and raising is provided at a location close to the engaging piece 10. Further, 12 is a lower reinforcing rod attached along the longitudinal direction outside the lower part of the formwork board 6, and is formed in a substantially L-shape in cross section, and its vertical portion corresponds to the engaging piece 10 of the upper reinforcing rod 8. A wavy engagement piece 13, which is bent in several steps in the vertical direction, similar to the engagement piece 13, is cut and raised at this location.

The device of the present invention is composed of the separator 1, the form plate 6, the upper reinforcing rod 8, and the lower reinforcing rod 12, which are assembled into the through holes 7, 7 of the form plate 6, respectively. 1 and protrudes from the outer surface of the form plate 6. Then, the engaging piece 10 of the upper reinforcing rod 8 is inserted between the outer end of the hook part 3 of the separator located above and the outer surface of the formwork plate 6, and the hooking part 9 is inserted into the formwork plate 6. The lower reinforcing rod 8 is fitted onto the upper edge, and the lower reinforcing rod 8 is also aligned with the form plate 6, and the engaging piece 13 is connected to the outer end of the hook portion 3 of the separator below and the outer surface of the form plate 6. It is inserted between.

FIG. 4 shows an example in which another embodiment is used as the upper reinforcing rod 8, and the upper reinforcing rod 8 has a hanging portion 9 in a shape different from that of the previous embodiment.
That is, the hanging part 9 has an upper end surface 9a extending longer than the thickness of the form board 6, and the downwardly extending part thereof is folded inward to form an inclined part 9b. Therefore, concrete 1
When the formwork is removed after pouring concrete 4, chamfers 15 are formed on both sides of the upper end of the hardened concrete 14 due to the inclined portions 9b of the upper reinforcing rods 8.

In all of the above-mentioned embodiments, a straight plate is applied to the formwork plate 6, and therefore, the upper reinforcing rod 8
Correspondingly, the lower reinforcing rod 12 is also straight. However, the form plate 6 is not limited to such a straight shape. Many concrete legal frame structures are formed in a lattice shape, and the present invention is also applicable to this. In such a case, the form plate 6 is assembled as a whole in the form of an encircling core. Figure 5,
FIG. 6 shows an example of a formwork device suitable for such a case.

That is, since the form plate 6 is bent and formed into a core shape of a desired shape, for example, as shown in FIG. Four pieces of the same shape are bent 16 in the longitudinal direction to fit the frame plate 6 and are attached to the form plate 6. Further, as shown in FIG. 6, each reinforcing rod 8, 12 may be joined at the center of each side of the formwork board 6, and in this case, each reinforcing rod 8, 12 has a substantially dogleg shape. It is bent and formed. Although not shown in the drawings, if the shape of the core-shaped formwork plate 6 is square, each reinforcing rod 8, 12 should be straight and the reinforcing rods 8, 12 should be joined at the corners of the formwork. You can also.

"Operation" The present invention is constructed as described above, and after the formwork is assembled, concrete is poured between the formwork plates 6, 6. After the concrete hardens, the upper reinforcing rod 8
The horizontal projecting piece 11 of is struck upward, and the horizontal portion of the lower reinforcing rod 12 is also struck upward to remove the upper reinforcing rod 8 and the lower reinforcing rod 13 from the separator 1 and form board 6, respectively. And formwork board 6
It peels off from concrete. In addition,
If a durable plywood board or the like is used for the form board 6, this can be used repeatedly.

"Effect of the invention" As explained above, the formwork device of the present invention is a formwork using a lightweight formwork board with low strength, and is provided with a hook portion that fits over the upper edge of the formwork board. The upper reinforcing rod and the lower reinforcing rod formed in an L-shape are joined to the top and bottom of the formwork board, and both reinforcing boards and the wedge insertion part of the separator are connected together with the wedge rod. The formwork plates are strongly reinforced and the formwork assembly is strong, allowing them to sufficiently withstand the lateral pressure of poured concrete, and there is no need to use a large number of batten materials as in the past. It is possible to provide a simple formwork device that has a simple structure, requires less materials, is easy to assemble and disassemble, and can significantly reduce overall construction costs.

[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 plan view showing the same part cut away, and Fig. 3 is a side sectional view showing an embodiment of the device of the present invention.
The figure is a perspective view showing each member separated, FIG. 4 is a partial side sectional view showing another embodiment, and FIG. 5 is a plan view showing an embodiment in which the formwork is core-shaped. FIG. 6 is a plan view showing another embodiment. 1... Separator, 3... Wedge insertion part, 4... Receiving part, 6... Form board, 7... Through hole, 8... Upper reinforcing rod, 9... Hook part, 11... Horizontal piece, 13... lower reinforcing rod, 16... wedge rod.

Claims (1)

[Scope of utility model registration request] A separator whose end portion is bent inward to form a hook portion, and the inner end portion of the hook portion is further bent to form a receiving portion for the formwork plate, and a separator is spaced from each other in the vertical and longitudinal directions, A formwork plate provided with a through hole through which the hook part of the separator is inserted, a hook part for fitting the upper edge of the formwork plate at the upper end thereof, and a hook part of the separator and an outer surface of the formwork plate. An upper reinforcing rod with an engaging piece that fits between the two, and a lower reinforcing rod with an L-shaped cross section that has an engaging piece on the vertical part that fits between the hook part of the separator and the outer surface of the formwork plate. characterized by becoming,
Concrete formwork equipment.