JPH0254036A - Concrete gutter cover - Google Patents

Abstract

PURPOSE:To increase productivity by pouring concrete into plastic forms provided with reinforcements mounted inside the peripheral wall and extended lengthwise and crosswise to be hardened together with the forms as a unit. CONSTITUTION:Plastic forms 16 provided with reinforcements 14 to be mounted to the inside of the peripheral wall 12 and to be extended lengthwise and crosswise are placed on a work plate such as a steel plate and the like. After that, concrete 18 is poured into the forms 16, and the concrete 18 is hardened together with the forms 16 as a unit to form a concrete gutter cover 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to improvements in concrete gutter covers.

(Prior art) Concrete gutter covers are constructed from a concrete body in which reinforcing bars extending vertically and horizontally are buried, but in the conventional technology, a formwork made of iron plates is used to form one or multiple gutter covers. Fresh concrete was prepared, poured into the formwork, allowed to harden and cured, and then the concrete body was extracted from the formwork to manufacture gutter covers.

(Problem to be Solved by the Invention) However, in such conventional technology, the work of supporting the reinforcing bars in the formwork and the drainage grid as necessary, the work of pouring ready-mixed concrete into the formwork, and the work of removing the product from the formwork. Since the work required is to pull out the mold, the workability is low and it is necessary to prepare an expensive formwork.Furthermore, since the peripheral surface of the side n';11 is made of concrete, there is a drawback that the appearance is poor.

The object of the present invention is to avoid the above-mentioned drawbacks and to be able to manufacture the product without the need for expensive formwork, and to install reinforcing bars and drainage gratings, which can be used as needed, into the formwork. To provide a concrete gutter cover that does not require work to pull out from the concrete and has a good appearance as a peripheral plastic surface.

(Means for Solving the Problems) In order to solve the above problems, the present invention is injected into a plastic formwork having reinforcing bars attached to the inside of a peripheral wall and extending vertically and horizontally, and hardened integrally with the plastic formwork. To provide a concrete gutter cover that is integrally made of concrete.

(Function) With such a concrete gutter cover, W! The frame is made of plastic and can be mass-produced by inserting reinforcing bars, so the formwork can be prepared at low cost, and there is no need to work to support the reinforcing bars, and the plastic formwork is integrated with the product. Productivity is improved because there is no need to remove the product from the mold while the product is still in place, and since the product has a plastic surface, it has a good appearance and can be colored.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings. Figs. 1 to 3 show a concrete gutter cover 20 according to the present invention.
This concrete gutter cover 20 includes, as a component part, a plastic formwork 16 which is placed on a working plate 10 such as a steel plate, is attached to the inside of the peripheral wall 12, and has reinforcing bars 14 extending vertically and horizontally. As shown in Figure 4,
A plurality of plastic formworks 16 are placed on a work plate 1O in order to manufacture a plurality of concrete gutter covers at the same time. The concrete gutter cover 20 is manufactured by pouring fresh concrete 18 into these plastic forms 16 and curing the fresh concrete 1B so as to be integrated with the plastic forms 16. Therefore, each concrete gutter cover 20 is a product having the plastic formwork 16 as a peripheral surface. The plastic formwork 16 can be made of polypropylene, for example, and in this case the plastic formwork 1
No. 6 is preferable because the product is colored.

In the illustrated embodiment, the reinforcing bars 14 are embedded so as to pass through and be supported by a lattice-shaped intermediate wall 16a integrally formed within the plastic formwork 16, but this intermediate wall 8! l 6
The reinforcing bars 14 may be supported by the peripheral wall of the plastic formwork 16 without a.

In addition, in the illustrated embodiment, the plastic formwork 16 has an inward flange 16b on its upper and lower edges, but the inner flange 16b is either omitted or provided only on one of the upper and lower edges. This inner flange 16b has the function of preventing the plastic formwork 16 from interlocking with the concrete product, thereby preventing the formwork 16 from peeling off from the product.

Furthermore, as shown in FIGS. 5 to 7, the plastic formwork 16 may be integrally formed with drain gratings 22 (gratings) that open at the top and bottom of the product, or may have iron drain grates inserted therein. In this case, drain grate 2
No fresh concrete is poured into 2, thus,
When the drain grate 22 is integrated with the plastic formwork 16,
The drain grate 22 can be easily inserted into the gutter cover, and the work of supporting the drain grate 22 on a formwork becomes unnecessary.

(Effects of the Invention) According to the present invention, as described above, the formwork is made of plastic and can be mass-produced by inserting reinforcing bars, so the formwork can be prepared at low cost, and the work of supporting the reinforcing bars can be done easily. If the drainage grid is integrated into the plastic formwork, there is no need to support the drainage grid on the formwork, and the plastic formwork remains integrated with the product, making it possible to remove the product from the formwork. Productivity is improved because there is no need for extraction work.Furthermore, since the peripheral surface of the product is made of plastic, it has a good appearance, and when a vehicle passes over the gutter, it does not touch the fitting surface of the gutter. No sound is generated between the concrete products, and if the plastic formwork has an inner flange, the plastic formwork serving as the surrounding wall does not need to be removed from the concrete product, which has the practical benefit of producing a high-quality product.

[Brief explanation of the drawing]

FIG. 1 is a top view of the concrete side n-cover according to the present invention, and FIGS. 2 and 3 are lines II-II and I of FIG. 1, respectively.
The enlarged cross-sectional view taken along the line II-III, FIG. 4, shows the concrete side &! A schematic explanatory diagram of the manufacturing method of the lid, FIG. 5 is a top view of another concrete gutter lid according to the present invention, and FIGS. 6 and 7 are the Vl-Vl line and Vll of FIG. 5, respectively.
It is an enlarged sectional view taken on the -1/II line. 12---One circumferential wall, 14---One reinforcing bar, 18---
--Plastic formwork, 1B----1 Concrete, 20----Concrete gutter cover. Diagram

Claims (1)

[Claims] (1) A plastic formwork that is attached to the inside of a peripheral wall and has reinforcing bars extending vertically and horizontally, and concrete that is injected into the plastic formwork and hardened together with the plastic formwork. A concrete gutter cover characterized by: (2) The concrete gutter cover according to claim 1, wherein the reinforcing bars are supported by penetrating an intermediate wall integrally formed within the plastic formwork. Claim 1: The lower edge has an inward flange.
Concrete gutter cover as described in Section 2 or Section 2. (4) The concrete gutter cover according to any one of claims 1 to 3, wherein the plastic formwork integrally has a drainage grate provided therein.