Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
2137842
SPECIFICATION
REFLECTING BODY HAVING HIGH LUMINANCE
6 BACKGROUND OF THE INVENTION
1. Field of the Invention:
The present invention relates to a reflecting body having high
lllmin~nce which is disposed on l~n~linE~ and/or manhole covers which
are respectively arranged in a manhole body and formed of a plurality of
10 plate bodies each having a plurality apertures.
2. Prior Art:
A typical manhole body 23 is shown in Fig. 6. The m?~nhole body
23 is formed by excavating a ground 21 to form a vertical hole 22 having a
large diameter and covering the peripheral surface of the vertical hole
15 22 with concrete. There is formed an inlet manhole 26 having a small
diameter through which an operator gets in for inspecting, repairing
and cleaning a sewer pipe, communication lines, etc. 25 (hereinafter
referred to as sewer pipe, etc. 25) which is disposed at the lowest end
portion 24 of the manhole body 23. Since the manhole body 23 is formed
ao of a vertical long hole, there are provided on the wall surface thereof a
foothold or staircase 27 composed of a plurality steps and a plurality of
landings 28 having manholes 29 through which the operator gets in or
out and which are normally closed by manhole covers 30.
When inspecting, repairing, cle~ning the sewer pipe, etc. 25, the
26 operator gets in the manhole body 23 through the manhole 26 using the
foothold 27, then he reaches the first landing 28 using the foothold 27.
Successively, he opens the manhole cover 30 provided on the first
landing 28 and steps down using the foothold 27 and reaches the next
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landing 28. The operator repeats the same actions and reaches the
lowest end portion 24 so as to inspect, repair, clean the sewer pipe, etc.
25. There is a modification of the landing 28 and manhole cover 30
employing a plurality of plate bodies each having a plurality of apertures
5 and made of synthetic resin for improving the ventilation as shown in
Fig. 5.
However, even if the landing 28 and/or manhole cover 30 is formed
of such a plate body so as to improve the ventilation as shown in Fig. 5,
there is no sufficient transparency in the manhole body 23 so that the
10 landing 28 is dark, which makes it difficult to confirm the position of the
manhole 29 or manhole cover 30. As a result, it causes such a problem
that it is difficult for the operator to get in or out from the manhole 29
and to move on the l~n~ling 28, which makes it difficult to inspect, repair
and clean the sewer pipe, etc. 25.
1~
SUMMARY OF THE INVENTION
The present invention has been made in view of the problem of the
conventional structure and it is an object of the present invention to
provide a reflecting body having high l~lmin~nce which is strong and
can be easily and surely mounted on the landing and/or manhole cover
respectively formed of a plurality of plate bodies each having a plurality
of apertures and which can be easily manufactured.
To achieve the object of the present invention, a reflecting body
having high lllmin~nce according to a first aspect of the invention is
25 disposed on landings arranged in a manhole body each of which is
formed of a plurality of plate bodies each having a plurality of apertures,
characterized in that it comprises a reflecting piece formed by a ceiling
having a plurality of concaves and convexes at the rear surface thereof
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and a plurality of legs having windows at the intermediate portions
thereof, and a stopper member which is mounted on the aperture of the
plate body and has projections, wherein the ceiling is integrated with the
legs and made of polycarbonate, polyacrylate or other transparent high
polymer substance and projections of the stopper member are inserted
into the windows of the legs.
A reflecting body having high lllmin~nce according to a second
aspect of the invention is disposed on manhole covers arranged in a
m~nh~le body each of which is formed of a plurality of plate bodies each
having a plurality of apertures, characterized in that it comprises a
reflecting piece formed by a ceiling having a plurality of concaves and
convexes at the rear surface thereof and a plurality of legs having
windows at the intermediate portions thereof, and a stopper member
which is mounted on the aperture of the plate body and has projections,
wherein the ceiling is integrated with the legs and made of
polycarbonate, polyacrylate or other transparent high polymer
substance and projections of the stopper member are inserted into the
windows of the legs.
A reflecting body having high lllmin~nce according to a third
ao aspect of the invention is characterized in that the stopper member of the
first and second aspects of the invention incudes a flat plate, a plurality
of legs having projections projected therefrom wherein a plurality of
legs of the reflecting piece of the first and second aspects of the invention
are inserted into the holes of the flat plate.
According to the first and second aspects of the invention, since
each of the reflecting body having high lnmin~nce disposed on the
landing and/or manhole cover arranged in the manhole body which is
formed of a plurality of plate bodies each having a plurality of apertures
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comprises a reflecting piece formed by a ceiling having a plurality of
concaves and convexes at the rear surface thereof and a plurality of legs
integrated ~,vith the ceiling and both of the ceiling and the legs are made
of polycarbonate, polyacrylate or other transparent high polymer, the
5 reflecting body is strong and it is easily manufactured. Furthermore,
since the projections projected from the stopper member, which are
mounted on the aperture constituting the landing and/or manhole
cover, are inserted into windows provided on the legs of the reflecting
piece so as to hold the reflecting body in the aperture, the reflecting body
10 is prevented from slipping out from the aperture of the plate body during
the transportation or during use thereof after the reflecting body is
installed on the landing and/or manhole cover, and hence reflecting
body having high lllmin~nce can be surely held by the landing and/or
manhole cover formed of a plurality of plate bodies each having a
15 plurality of apertures. Still furthermore, since a plurality of concaves
and convexes are formed on the back surface of the ceiling made of
polycarbonate, polyacrylate or other transparent high polymer, the
reflecting body having high lllmin~nce can reflect the light inside the
manhole, thereby performing diffused reflection inside the manhole
2~ body and easily confirming the configuration of the landing and/or
manhole cover.
According to the third aspect of the invention, since holes are
penetrated through the flat plate of the stopper member and the legs of
the reflecting piece are inserted into the holes of the flat plate and the
25 projections are provided on the plurality of legs of the stopper member,
the reflecting body can be easily mounted on the landing/or manhole and
the reflecting body is not prevented from slipping out from the aperture
of the plate body during the transportation or during use.
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BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a plan view of a reflecting body having high lllmin~nce
disposed on a plate body according to a preferred embodiment of the
5 invention;
Fig. 2 is a cross-sectional view taken along A-A of Fig. 1;
Fig. 3 is a plan view of a stopper member as a constituent of the
reflecting body of Fig. 1;
Fig. 4 is a cross-sectional view taken along B-B of Fig. 3;
Fig. 5 is a plan view of landings and manholes of a conventional
manhole body; and
Fig. 6 is a cross-sectional view of the conventional manhole body of
Fig. 5.
PREFERRED EMBODIMENT OF THE INVENTION
A preferred embodiment of the invention will be described with
reference to Figs. 1 to 4.
A reflecting body having high lllmin~nce is placed on a given
aperture 7 of each landing and/or each manhole cover respectively
ao formed of a plurality of plate bodies each having a plurality of apertures
and comprises a reflecting piece 1 formed by a ceiling 2 which is formed
integrally with a plurality of legs 3, 3 positioned inside the aperture 7
and a stopper member 6 which is mounted on each aperture 7 of such
landing and/or manhole cover.
The reflecting piece 1 is made of polycarbonate, polyacrylate or
other transparent high polymer substance. A plurality of concaves and
convexes 4 serving as reflecting parts are formed on the rear surface of
the ceiling 2 when they are integrally formed with the legs 3, 3 . The
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reflecting parts may be formed on the upper surface of the ceiling 2 in
addition to those formed on the rear surface of the ceiling 2. Windows 5
are provided for each of the legs 3, 3 at the intermediate portion
thereof. The windows 5 are formed by perforating each leg 3 or
5 recessing each leg. The stopper member 6 comprises a flat plate 8 and
legs 10, 10 wherein the flat plate 8 has holes 9, 9 which are formed
by penetrating the flat plate 8 and through which the legs 3 and 3 of the
reflecting piece 1 are inserted and the legs 10, 10 - have projections 11,
11 which are respectively projected inwardly. The stopper member 6
10 has a function to bring the legs 10, 10 of the stopper member 6 into
contact with the aperture 7 of the plate body so as to mount the legs 10,
10 - on the aperture 7 .
The reflecting body is placed in the aperture 7 of the landing
and/or manhole cover respectively formed of a plurality of plate bodies
15 each having a plurality of apertures and the legs 3, 3 are positioned
inside the aperture 7. In this state, when the stopper member 6 is
inserted into the aperture 7 from the lower portion of the aperture 7
while the legs 10, 10 of the stopper member 6 are directed upward, the
tip ends of the legs 3 and 3 penetrate the holes 9, 9 of the flat plate 8
2D and the projections 11 and 11 of the legs 10, 10 are inserted into the
windows 5 of the legs 3, 3 so that the stopper member 6 is integrated
with the reflecting piece 1 and the legs 10, 10 of the stopper member 6
are mounted on the aperture 7 of the plate body. As a result, the
reflecting piece 1 can be disposed at and held by a given aperture 7 of
25 the landing and/or manhole cover with assurance.
The reflecting body may be held by a given aperture 7 of the
landing and/or manhole cover in the following manner. That is, firstly,
the legs 10, 10 of the stopper member 6 is mounted at the intermediate
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portion of the aperture 7 while the flat plate 8 is directed upward,
secondly, the legs 3, 3 of the reflecting piece 1 are inserted into the
aperture 7, thirdly, the legs 3, 3 are inserted into the holes 9, 9 - of
the flat plate 8, and finally the projections 11, 11 of the stopper member
5 6 are inserted into and held by the windows 5 of the legs 3, 3 --.
As mentioned above, the reflecting body is disposed on the landing
and/or manhole cover respectively formed of a plurality of plate bodies
each having a plurality of apertures and it is arranged in the manhole
body. The reflecting body comprises the reflecting piece 1 formed by the
10 ceiling 2 having a plurality of concaves and convexes 4 at the rear
surface thereof and a plurality of legs 3, 3 - integrated with the ceiling 2
wherein the ceiling 2 and the plurality of legs 3, 3 are made of
polycarbonate, polyacrylate or other transparent high polymer
substance, so that the reflecting body is strong and it is easily
15 manufactured. Furthermore, the reflecting body can be disposed at and
held by a given aperture 7 of the landing and/or manhole cover by
mounting the legs 3, 3 on the aperture 7 ut.ili7.ing the stopper
member 6 and the aperture 7 constituting the landing and/or manhole
cover. Still furthermore, since a plurality of concaves and convexes 4
ao are formed on the rear surface of the ceiling 2 made of the
polycarbonate, polyacrylate or other transparent high polymer
substance, the reflecting body can reflect the light inside the manhole,
thereby performing diffused reflection inside the manhole body so that
the configuration of the landing and/or manhole cover can be easily
25 confirmed and the operator can move easily on the landing and/or
manhole cover. When the concaves and convexes 4 are formed on both
the upper and rear surfaces of the ceiling 2, diffusing reflection can be
performed more effectively.
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According to the first aspect of the invention, since the reflecting
body having high lllm;n~nce disposed on the landing arranged in the
manhole body which is formed of a plurality of plate bodies each having
a plurality of apertures comprises a reflecting piece formed by a ceiling
5 having a plurality of concaves and convexes at the rear surface thereof
and a plurality of legs integrated with the ceiling and both of the ceiling
and the legs are made of polycarbonate, polyacrylate or other
transparent high polymer, the reflecting body is strong and it is easily
manufactured. Furthermore, the reflecting body can be easily and
10 surely disposed at a given position of the flat plate by mounting the legs
of the stopper member on the aperture. If the reflecting body is applied
to the landing, the landing becomes bright to thereby clearly define the
landing area. As a result, the operator can easily move on the landing.
since the legs are inserted into the aperture
15According to the second aspect of the invention, since the
reflecting body having high lllmin~nce disposed on the manhole cover
arranged in the manhole body which is formed of a plurality of plate
bodies each having a plurality of apertures comprises a reflecting piece
formed by a ceiling having a plurality of concaves and convexes at the
a~ rear surface thereof and a plurality of legs integrated with the ceiling
and both of the ceiling and the legs are made of polycarbonate,
polyacrylate or other transparent high polymer, the reflecting body is
strong and it is easily manufactured. Furthermore, the reflectingbody
can be easily and surely disposed at a given position of the flat plate by
25 mounting the legs of the stopper member on the aperture. If the
reflecting body is applied to the landing, the landing becomes bright to
thereby clearly define the landing area. As a result, the operator can
easily get in or out from the manhole hole by opening the manhole cover.
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According to the third aspect of the invention, since holes are
penetrated through the flat plate of the stopper member and the legs of
the reflecting piece are inserted into the holes of the flat plate and the
projections are provided on the plurality of legs of the stopper member,
5 the reflecting body can be easily mounted on the landingtor m~nhole and
the reflecting body is not prevented from slipping out from the aperture
of the plate body during the transportation or during use thereof.
