JPH09209381A - Rectangular manhole and cover opening method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily draw out a cover main body on one side in the longitudinal direction by providing a pair of wheels on the underside of the rectangular cover main body, and providing rails on which the wheels can rollingly move on a frame body to which the cover main body is fitted. SOLUTION: An opening/closing handle 24 having a hook part 23 is fitted to a hand hold part, an inverted-chevron-shaped carriage 26 having a pair of wheels 25 is hooked with the hook part 23, the short side 2b of a cover main body 2 is lifted by application of lever principle, and hence wheels 7 are ridden on rails 22, Next by pulling the carriage 26, the wheels 7 are rollingly moved on the rails 22, the cover main body 2 is drawn out in the longitudinal direction so as to fully open an opening part 9, and the cover main body 2 is placed on the ground surface 10' on one side. In this way, the cover main body 2 can be drawn out on one side in the lengthwise direction, hence even when a rectangular manhole is provided on a road and the like between structures, the detached cover main body 2 does not exist on the ground surface 10" on the other side, and long pipes and the like can be smoothly introduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectangular manhole installed on a sidewalk, a road and the like and a method of opening the manhole.

[0002]

2. Description of the Related Art Conventionally, manholes of various shapes have been provided at the opening on the ground surface that communicates with an underground space for installing electric wires, gas pipes, sewers, etc. A rectangular manhole is installed when a long pipe or the like must be introduced or at the opening of the common groove. Such a manhole cover body is generally longer than a circular or square manhole due to the introduction of a long pipe, etc., especially when a thick block is buried as a floor material on the upper surface of the lid body. Furthermore, the weight increases, and the opening and closing work is not easy.

Therefore, as shown in FIG. 8, a rectangular lid body 36 is constituted by two divided lids 35, 35, and the divided lids 35, 35 can be pulled out to the left or right to open. Alternatively, a method is adopted in which the lid body is divided into a plurality of parts and a part of the lid main body is hinged to a part of the frame body to open and close in a hatch type.

[0004]

However, the lid main body
Even if 36 is divided and the lid is opened, if the entire rectangular manhole is large, the divided lid 35 itself divided into two is heavy, and it is not easy to open the lid by one person. Further, when the rectangular manhole is divided into three or more pieces, the weight of the division lid 35 becomes lighter, but the lid opening work must be performed many times, and the work is complicated.

Particularly, the place where the manhole is installed is parallel to the longitudinal direction of the road as shown by the chain double-dashed line in FIG.
In the case of a sidewalk where 37 and a structure 38 such as a fence / building are constructed, there are the following problems. That is, the opening 40
The space 41 between the roadway 37 and the roadway 37 is extremely narrow because the opening 40 is generally provided near the roadway 37 (close to the guard fence 42). On the other hand, the space 43 between the opening 40 and the structure 38 cannot be used sufficiently as a working space because it is desirable to secure a sidewalk so that a person can pass through it.
Also, if the sidewalk cannot be secured, there are many inconveniences such as obstruction due to pedestrian safety. Furthermore, it is difficult for a plurality of people to work in such a place, and it is difficult to use heavy equipment.

Therefore, the dividing lids 35, 35 are necessarily drawn out into both the spaces 44, 44 in the longitudinal direction. However, in such a state, the working passage is not sufficiently secured, and the long lid is elongated from the longitudinal direction. Split lid 35 when introducing pipes into the opening 40
However, there was a problem that it interfered with and caused trouble.

The present invention has been made in view of the conventional problems as described above, and provides a rectangular manhole in which the lid body can be easily pulled out to one side in the longitudinal direction thereof, and a method of opening the manhole. This is an issue.

[0008]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems. Means for solving the problems is that a rectangular lid main body 2 and the lid main body 2 are fitted to each other. In the rectangular manhole consisting of the frame body 3 and the frame body 3, a pair of wheels 7 and 7 that can roll to pull out the lid body 2 in the longitudinal direction are formed on the lower surface of the lid body 2 at the peripheral edge 8 of the lid body 2. The rails 22 and 22 are provided on the inner side, and the frame 3 is provided with rails 22 and 22 on which the wheels 7 and 7 can roll.

The rectangular manhole composed of such means is
Since the lid body 2 is provided with the wheels 7, 7, the lid can be opened extremely easily and easily as compared with the conventional manhole. That is, as described in claim 4, the lid main body
The pair of wheels 7 and 7 provided on the lower surface of the lid body 2 rolls on the rails 22 and 22 of the frame body 3 by pulling out in the longitudinal direction while lifting the one short side 3a side of 2 upward. The lid body
2 is disengaged from the frame 3 to open the lid.

As described above, when the lid is opened, the lid main body 2 can be removed on one side in the longitudinal direction of the rectangular manhole. Further, since the wheels 7, 7 are provided inside the peripheral edge 8 of the lid main body 2, the wheels 7, 7 do not project outside the peripheral edge 8, and therefore, when the lid main body 2 is pulled out, the wheel 7, 7
There is an advantage that the lid main body 2 can be smoothly pulled out without contacting the frame 3 and the wheels 7 and 7 are not easily damaged.

Further, as in the means described in claim 2, at the four corners 2a ', 2b', ... of the lower surface of the lid body 2, there are wheels 7, 7 ', ... which are rollable in the longitudinal direction of the lid body 2. If the lid body 2 is located inside the peripheral edge 8 of the lid body 2, the lid body 2 is pulled out not only on one side in the longitudinal direction but also on the other side,
It has the advantage that it can be removed from 3.

Further, as described in claim 3, the frame 3
If a receiving portion 15 is provided to support the lid body 2 in a state where the wheels 7, ... Are not in contact with the bottom surface 20 of the frame body 3 when the lid body 2 is fitted, the lid is closed when the lid is closed. Body 2 Self-weight and lid body 2
Since the load applied to the wheel 7 is supported by the receiving portion 15 of the frame 3 and is not applied to the wheels 7, ..., The wheels 7 ,.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a rectangular manhole and a method for opening the manhole according to the present invention will be described below with reference to the drawings. 1 to 3, 1 denotes a lid main body 2 having a rectangular shape in plan view which is installed in an opening 9 excavated in a road or the like, and a lid main body 2 which is embedded around the opening 9 and is covered with the lid main body 2. A rectangular manhole consisting of a frame 3 that can be fitted and supported is shown.

More specifically, the lid body 2 is a floor material housing in which a plurality of thick finishing floor materials 4 (only one is shown in FIG. 3) are embedded on the upper surface via a filler such as mortar. It is formed in a concave shape in cross section to secure the space 5, and the lid body
A flange portion which is fitted into the frame body 3 and is flush with the ground surface 10 is provided around the peripheral edge 8 of the frame 2.

Further, one of the shorter sides 2a of the lower surface of the lid body 2
(Hereinafter, abbreviated as one short side 2a) On both side corners 2a ', 2a',
A pair of rotatable wheels 7,7 rolling in the direction from the one short side 2a to the other short side 2b (similarly, the other short side 2b), that is, the longitudinal direction of the lid body 2, is provided from the peripheral edge 8 of the lid body 2. It is hung inside so that it does not project. Further, a grip portion 6 to which an opening / closing handle is attached is provided at the central portion on the other short side 2b side of the lid body 2.

Since the wheels 7, 7 do not project outward from the peripheral edge 8 of the lid body 2, not only the lid body 2 but also the frame 3 can be made compact.

On the other hand, the frame 3 is formed in a rectangular shape in a plan view, and a flange portion 11 for fixing it in the ground is provided so as to project to the outside.

Further, the frame body 3 is provided with a receiving portion 15 which is shorter than the outer frame portion 12 and protrudes inwardly to support the lower surface of the fitted lid main body 2. A flat packing seat 17 is formed at the upper end of the receiving portion 15 to which a packing 16 provided on the lower surface of the lid body 2 abuts.

With such packing 16 and packing seat 17,
It is possible to prevent water, dust, and the like flowing in from the gap between the outer frame portion 12 of the frame body 3 and the peripheral edge 8 of the lid body 2 from entering the opening portion 9.

A wheel storage space 19 is secured between the outer frame portion 12 and the receiving portion 15 to store the wheels 7, 7 when the lid body 2 is fitted, as shown in FIG. As described above, the housed wheels 7 are housed in a state of floating in the air without coming into contact with the outer frame portion 12, the receiving portion 15, and the bottom surface 20 of the frame body 3.

By being accommodated in such a state that it floats in the air, even if a load is applied to the lid main body 2, the load is supported by the receiving portion 15 of the frame body 3 and is not applied to the wheels 7, 7, so that the wheels 7, 7
Has the advantage that it is hard to damage.

Further, since the wheels 7, 7 of the lid body 2 are provided inside the peripheral edge 8 of the lid body 2, the shape of the wheel housing space 19 of the frame body 3 is a substantially concave shape with an upper opening. Just enough,
The structure of the mold for manufacturing the frame 3 is simplified.

Further, one short side 3a of the frame body 3 is provided between the outer frame portion 12 and the receiving portion 15 on both long sides 3c, 3c of the frame body 3 (hereinafter referred to as both long sides 3c, 3c). The rails 22 and 22 that are inclined upward in the direction of the other short side 3b are respectively provided.

The rectangular manhole 1 having the above structure is
The frame body 3 is buried in the ground, and the lid body 2 is fitted into the frame body 3 for use. A method for opening the lid body 2 of the rectangular manhole 1 will be described below.

As shown in FIGS. 4 and 5, first, the handle portion
An opening / closing handle 24 having a hanging portion 23 is attached to 6, and an inverted V-shaped carriage 26 having a pair of wheels 25 is hooked on the hanging portion 23 of the opening / closing handle 24 to apply the principle of leverage. When the other short side 2b of the lid main body 2 is lifted upward, the peripheral edge 8 of the one short side 2a of the lid main body 2 hits the outer frame portion 12 of the frame body 3 to serve as a fulcrum, and the packing 16 on the one short side 2a side becomes It will be separated from the packing seat 17 of the frame 3.

Then, the wheels 7 and 7 climb up on the rail 22, and when the truck 26 is pulled next, the wheels 7 and 7 roll on the rail 22 and the lid body 2 is pulled out in the longitudinal direction to open the opening 9. Is fully opened, and the lid body 2 is placed on the ground surface 10 ′ on one side. On the other hand, when closing the opening 9, the lid body 2 may be performed in the reverse order of the above. The lid body 2 can be removed from the frame body 3 after being pulled out.

Since the lid body 2 can be pulled out to one side in the longitudinal direction in this way, even when a rectangular manhole is installed on a road between structures, the other side of the ground surface 10 "is not Since the removed lid main body 2 does not exist, the work of introducing a long pipe or the like can be performed smoothly.

Since the lid body 2 is provided with the wheels 7 and 7, the lid can be opened extremely easily and easily as compared with the conventional manhole which is pulled out while being in contact with the frame 3. be able to. Therefore, a long rectangular manhole can be formed. In addition, the wheels 7 and 7 are
Since it is provided inside the peripheral edge 8 of 2, the wheels 7 and 7 do not come into contact with the frame 3 when the lid body 2 is pulled out.

Further, since the rails 22, 22 are provided in the longitudinal direction, the inclination of the rail 22 becomes very gentle, and the lid main body 2 can be pulled out in the longitudinal direction more than in the case of being pulled out in the width direction. There is an advantage that the pulling force can be reduced.

In the above embodiment, the wheels 7,7 are
Not limited to a pair, for example, as shown in FIG.
2 Both corners 2a ', 2a' of one short side 2a and both corners 2b ', 2 of the other short side 2b
Wheels 7, ... Rolling in the longitudinal direction may be provided in b ′.

Specifically, the wheels 7 on one short side 2a of the lid body 2,
Wheels 7 ', 7'are provided on the other short side 2b by making the distance between the rails 22, 22 on which the 7 rolls and the wheels 7, 7 on the one short side 2a slightly smaller than the distance between the other short side 2b. Rails 22 'and 22' on which 7'and 7'roll are provided with an upward inclination from the other short side 2b to the one short side 2a, and moreover, the central portion on the side of the one short side 2a and the other short side 2b of the lid main body 2 The handle part 6,6
Are provided respectively.

When the wheels 7, are provided at the four corners of the lid main body 2 in this way, the lid main body 2 can be pulled out in either one of the longitudinal direction and the other side as shown by the arrows in the figure. There is an advantage.

In the above embodiment, the lid body 2
Has a floor material storage space 5 for burying a thick finishing floor material 4, but the lid body 2 does not necessarily have a floor material storage space.
The lid body 2 does not have to be provided, and the lid body 2 may be formed of a simple plate-like member having no floor material accommodation space 5. If the lid body 2 is formed in a simple plate shape as described above, its own weight becomes relatively light, and instead of the wheels 7 and 7 provided on the lid body 2, the lid body 2
It is also possible to provide dome-shaped convex portions capable of sliding on the rails 22, 22 of the frame body 3 at both corners 2a ', 2a' of the lower surface of the frame.

Further, in the above embodiment, the lid body 2
The packing 16 is provided on the
The packing 16 does not have to be provided on the.

In addition, the method of installing the rectangular manhole in the above embodiment has exemplified the case where one is installed on the sidewalk, but, for example, when the opening 9 is very long, a plurality of openings are provided in the opening 9. It is also possible to install the lid main bodies 2, ... Connected in the longitudinal direction.

In this case, as shown in FIG. 7, if the first lid main body 2 is pulled out to one side in the longitudinal direction, that is, the second lid main body 2'direction, and further to the ground surface 10 'on one side. , A part of the opening 9 is opened, and the second lid body 2'is drawn out to one side (shown by a chain double-dashed line in the figure), and further the ground surface 10 '
By pulling out the lid main bodies 2, ... one after another, such as pulling them all the way up, all the lid main bodies 2, ...
Will be placed in. In this way, multiple lid bodies 2,
Even when the ... Are connected in the longitudinal direction, the lid main body 2 can be entirely pulled out to one side when the opening 9 is fully opened.

Further, in the above embodiment, the rail 22 provided on the frame body 3 is provided so as to be inclined upward, but the rail 22 does not necessarily have to be provided so as to be inclined. For example, when the lid body 2 is formed in a plate shape, the rail 22 may be formed horizontally since the thickness of the lid body 2 itself is thin.

[0038]

As described above, in the rectangular manhole according to the present invention, the wheels that can roll longitudinally on the rails provided on the frame body on the lower surface of the lid body are located inside the peripheral edge of the lid body. When the lid is opened, the wheel rolls on the rail when the lid body is pulled out in the longitudinal direction while lifting one short side of the lid upward, and one of the longitudinal directions of the rectangular manhole is extended. The lid body can be removed to the side.

Therefore, even when the rectangular manhole is installed in a place where the workability is poor, the lid body can be opened and closed by one person, and the long pipe is removed when it is introduced. The lid body does not get in the way. Further, since the wheels are provided inside the peripheral edge of the lid body, the wheels can be smoothly pulled out without coming into contact with the frame body when the lid body is pulled out.

Further, if wheels capable of rolling in the longitudinal direction of the lid body are provided at four corners on the lower surface of the lid body and are located inside the peripheral edge of the lid body, respectively, when opening the lid, There is an advantage that the lid body can be pulled out from any of its longitudinal directions.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a rectangular manhole according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged cross-sectional view of portion B of FIG.

FIG. 4 is a cross-sectional view showing a method of opening a lid body of a rectangular manhole.

5 is an enlarged cross-sectional view of a C portion of FIG.

FIG. 6A is a plan view showing another embodiment of the rectangular manhole according to the present invention, and FIG.
Sectional drawing of D line.

FIG. 7 is a schematic perspective view showing another embodiment of the method for opening a rectangular manhole according to the present invention.

FIG. 8 is a schematic perspective view showing a conventional rectangular manhole.

[Explanation of symbols]

2 ... Lid main body, 2a ... One short side, 2a ', 2b' ... Both corners, 2b ... Other short side, 3 ... Frame body, 7,7 '... Wheel, 8 ... Perimeter, 20 ... Bottom surface, 22 ...
rail

Claims (4)

[Claims] 1. A rectangular manhole comprising a rectangular lid body (2) and a frame body (3) into which the lid body (2) is fitted, wherein one short side of the lid body (2) ( 2a) side bottom corners (2a '), (2
In a '), a pair of wheels (7), (7) that can roll to pull out the lid body (2) in the longitudinal direction are located inside the peripheral edge (8) of the lid body (2). On the other hand, the rectangular manhole, wherein the frame body (3) is provided with rails (22), (22) on which the wheels (7), (7) can roll. 2. A rectangular manhole comprising a rectangular lid body (2) and a frame body (3) into which the lid body (2) is fitted, wherein four corners (2a) of the lower surface of the lid body (2). Wheels (7), (7 '), ... that are rollable in the longitudinal direction of the lid body (2) are included in'), (2b ') ,.
Are respectively provided inside the peripheral edge (8) of the lid body (2), while the wheels (7), (7 '), ... Are provided on the frame body (3).
A rectangular manhole characterized by being provided with rails (22) that can roll. 3. The lid body (3) is fitted to the lid body (2) with the wheels (7), ... Not contacting the bottom surface (20) of the frame body (3). The rectangular manhole according to claim 1 or 2, further comprising a receiving portion (15) for supporting the main body (2). 4. A frame body (3) buried in a road or the like, and the frame body
A method for opening a rectangular manhole, comprising a rectangular lid body (2) that can be fitted in (3), wherein one short side (2a) side of the lid body (2) is raised in the longitudinal direction. A pair of wheels provided on the lower surface of the lid body (2) by pulling it out.
(7) and (7) roll on the rails (22) and (22) of the frame body (3), and the lid body (2) is detached from the frame body (3) to open the lid. How to open the rectangular manhole.