JP3656151B2 - How to make a plate-shaped lid - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lid for an opening such as a waterway such as a sewer or a waterworks, a reservoir, or a sedimentation basin.
[0002]
[Prior art]
Conventionally, a sewer or a settling basin is covered with a lid to prevent a fall or an odor. The lid a has a structure in which a metal handle b such as stainless steel is attached to a plate-like body made of concrete or synthetic wood.
Such a metal handle b has a problem that it is corroded, a nut or the like is removed and it is easy to drop or lose, and the cost is high.
[0003]
[Object of the present invention]
The present invention is to provide a useful plate-like lid.
[0004]
[Means for solving problems]
The present invention creates a planar body of a single plate of a thermosetting resin foam reinforced with fibers, see write off corner portion of the side surface and the upper surface of the plate-like body therein was roughly cut with a diamond bit, NC A method for producing a plate-like lid, characterized in that a dedicated router bit is attached to a router and cut, and a concave portion that has a ceiling portion and does not penetrate to the bottom surface is created as a handle .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0006]
<A> Outline of the plate-like lid The plate-like lid has a handle 3 composed of a recess 22 in which a single plate-like plate-like body 2 is cut as shown in FIG. The handle 3 is composed of a side surface 4 of the plate-like body 2 and a concave portion 22 cut into the inside from a corner portion 21 of the upper surface 5.
[0007]
<B> Plate-like body The plate-like body 2 is one in which fibers are arranged in a thermosetting resin foam. As the resin, urethane, phenol resin, urea resin or the like can be used. As the fiber, glass fiber, carbon fiber, synthetic fiber or the like can be used. As the fiber shape, roving, roving cloth, continuous strand mat, or the like can be used. In addition to resin and fiber, a filler or the like may be added to the plate-like body.
[0008]
<C> Manufacturing method of plate-shaped body The plate-shaped body can be manufactured by various methods such as a batch method and a continuous method. In the batch method, a reinforcing material such as glass fiber is laid in a mold having a predetermined shape, and the stock solution is spread and foamed and cured (see Japanese Patent Publication No. 63-34809).
[0009]
In the continuous method, a reinforcing material such as glass fiber is impregnated with a foam curable resin, the reinforcing material is guided to the forming passage, and foamed and cured in the forming passage (see Japanese Patent Publication No. 48-30137).
[0010]
The plate-like body reinforced with glass fiber in the hard urethane resin foam has a specific gravity of 0.5.
[0011]
<D> For the handle handle, for example, the corner portion of the plate-like body is roughly cut with a diamond bit, and then a dedicated router bit is attached to the NC router and cut to process the shape. After cutting, paint and arrange the beauty.
[0012]
The shape of the handle may be any shape as long as the plate-shaped lid can be easily lifted. The shape of the handle is, for example, as shown in FIG. 2 to FIG. The lateral width of the recess is approximately 120 mm, the depth into which the finger enters is approximately 50 mm, and the ceiling portion on which the finger is placed has an arcuate shape with a maximum depth of 20 mm.
[0013]
【The invention's effect】
The present invention can obtain the following effects.
<I> Since the handle of the present invention does not have a hole penetrating to the lower surface, there is no problem of odor leaking.
<B> There is no problem of corrosion or loss because no accessories such as metal are used.
<C> The shape of the handle of the present invention does not cause a problem of water accumulation even when used outdoors.
<D> Since the plate-like body of the present invention uses a single plate, there is no need for an adhesion step like a multilayer plate, manufacturing time and cost can be reduced, and maintenance management becomes easy.
[Brief description of the drawings]
FIG. 1 is a perspective view of a plate-like lid according to the present invention. FIG. 2 is a plan view of the plate-like lid. FIG. 3 is an enlarged view of a handle. Side view of VV of Fig. 6 Fig. 6 is a perspective view of a conventional plate-shaped lid.
DESCRIPTION OF SYMBOLS 1 ... Plate-shaped lid 2 ... Plate-shaped body 21 ... Corner part 22 ... Recess 3 ... Handle 4 ... Side surface 5 ... Top surface

Claims (1)

Create a single plate of thermosetting resin foam reinforced with fiber,
See write off the corner portion of the side surface and the upper surface of the plate-like body therein was roughly cut with a diamond bit,
Attach a dedicated router bit to the NC router and cut it.
It is characterized by creating a recess that has a ceiling portion and does not penetrate to the bottom surface,
How to make a plate-shaped lid.

Images