JP2883913B2 - Rectangular manhole and method for opening the manhole - Google Patents

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 or a road, and a method for opening the manhole.

[0002]

2. Description of the Related Art Conventionally, manholes of various shapes are provided in an opening on the ground surface which communicates with an underground space for providing electric wires, gas pipes, sewers, etc., according to its use. A rectangular manhole is installed in the case where a long pipe or the like must be introduced or in an opening such as a common groove. The lid body of such a manhole is generally longer than a circular / 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, The weight is further increased, and the opening and closing work is not easy.

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

[0004]

SUMMARY OF THE INVENTION However, the lid body
Even if the cover 36 is divided and opened, if the entire rectangular manhole is large, the divided cover 35 itself is also heavy, and it is not easy to open the cover alone. Further, when the rectangular manhole is divided into three or more, the weight of the divided lid 35 is reduced, but the opening operation must be performed many times, and the operation is complicated.

[0005] In particular, as shown by a two-dot chain line in FIG.
In the case of a sidewalk or the like in which 37 and a structure 38 such as a wall or a building are constructed, there are the following problems. That is, the opening 40
The space 41 between the vehicle and the road 37 is extremely narrow because the opening 40 is generally provided near the road 37 (close to the guard fence 42). On the other hand, the space 43 between the opening 40 and the structure 38 cannot be sufficiently used as a work space because it is desirable to secure a sidewalk to such an extent that a person can pass.
In addition, when the sidewalk cannot be secured, there are many inconveniences, such as having to close the road for the safety of pedestrians. Further, in such a place, it is difficult for a plurality of persons to work, and it is difficult to use heavy equipment and the like.

Therefore, the divided lids 35 are inevitably drawn out to both the longitudinal spaces 44, 44. However, in such a state, the working passage is not sufficiently secured, and the elongated cover is elongated from the longitudinal direction. When introducing a pipe or the like into the opening 40, the split lid 35
However, there was a problem that it was in the way and hindered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a rectangular manhole in which a lid body can be easily pulled out to one side in a longitudinal direction thereof, and a method for opening the manhole. That is the task.

[0008]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and means for solving the problems is that a rectangular lid body 2 is fitted with the lid body 2. In the rectangular manhole composed of the frame body 3 and the lower surface of the lid body 2, a pair of wheels 7, 7 that can roll to pull out the lid body 2 in the longitudinal direction are provided on the periphery 8 of the lid body 2. The frame 3 is provided with rails 22, 22 on which the wheels 7, 7 can roll .
When the lid body 2 is fitted to the frame 3, the wheels 7,
7 supports the lid body 2 so that it does not touch the bottom surface 20 of the frame 3.
The receiving part 15 is provided as required.

[0009] The rectangular manhole composed of such means,
Since the wheels 7 are provided on the lid body 2, the lid can be opened extremely easily and easily as compared with the conventional manhole. Immediately Chi, by drawing in the longitudinal direction while before lifting one short side 3a of the Kifuta body 2 upwardly, the lid body
A pair of wheels 7, 7 provided on the lower surface of 2
Rolling on 22,22, the lid main body 2 comes off the frame 3 to open the lid.

As described above, when the lid is opened, the lid body 2 can be removed from 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 protrude outside the peripheral edge 8, and therefore, when the lid main body 2 is pulled out, the wheels 7, 7 are pulled out. 7
There is an advantage that the lid body 2 can be smoothly pulled out without contacting the frame body 3 and the wheels 7, 7 are hardly damaged. Moreover, the lid body 2 was fitted to the frame body 3.
When the wheels 7, 7 are not in contact with the bottom surface 20 of the frame 3,
Since the receiving part 15 is provided to support the main body 2, the lid is closed.
Sometimes the weight of the lid body 2 and the load applied to the lid body 2
3 and is not supported by the wheels 7,7.
7,7 are not easily damaged.

Further, wheels 7, 7 ',... Which can roll in the longitudinal direction of the lid body 2 are provided at the four lower corners 2a', 2b ',. If the cover body 2 is provided on the inner side of the peripheral edge 8 of the cover body 2, the cover body 2 is drawn out not only on one side but also on the other side in the longitudinal direction, and the frame body
There is an advantage that it can be removed from 3.

[0012] Moreover, the frame body 3, when the lid body 2 is fitted, the wheel 7, ... receiving portion 15 so as to support the cover body 2 is provided in a state where no contact with the bottom surface 20 of the frame 3 Has been
When the lid is closed, the weight of the lid body 2 and the load applied to the lid body 2 are:
Since it is supported by the receiving portion 15 of the frame 3 and does not join the wheels 7,.
Wheels 7, ... are not easily damaged.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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. In FIG. 1 to FIG. 3, reference numeral 1 designates a lid body 2 having a rectangular shape in a plan view installed in an opening 9 excavated on a road or the like, and a lid body 2 buried around the opening 9 and 4 shows a rectangular manhole comprising a frame 3 capable of being fitted and supported.

More specifically, the lid main body 2 has a plurality of thick finishing floor materials 4 (only one of which is shown in FIG. 3) on the upper surface. It is formed in a substantially concave shape in cross section to secure the space 5, and the lid body
A flange 8 which is fitted inside the frame 3 and is flush with the ground surface 10 is provided around the second peripheral edge 8.

Further, one of the short sides 2a on the lower surface of the lid body 2
(Hereinafter, abbreviated as one short side 2a), two corners 2a ', 2a'
A pair of rotatable wheels 7, 7 rolling from one short side 2a to the other short side 2b (similarly, the other side 2b of the short side), that is, in the longitudinal direction of the lid main body 2, is moved from the peripheral edge 8 of the lid main body 2 It is suspended inside so as not to protrude. At the center of the lid body 2 on the other short side 2b side, a handle 6 to which an opening / closing handle is attached is provided.

Since the wheels 7, 7 do not protrude outward from the peripheral edge 8 of the lid main body 2, not only the lid main 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 11 for fixing it to the ground is projected outward.

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

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

A wheel storage space 19 is provided 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. Thus, the stored wheels 7 are stored in a state of being suspended in the air without contacting the outer frame portion 12, the receiving portion 15, and the bottom surface 20 of the frame 3.

By being stored in such a state that it is suspended in the air, even if a load is applied to the lid body 2, the load is supported by the receiving portion 15 of the frame 3 and is not applied to the wheels 7. 7
Has the advantage that it is not easily damaged.

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 storage space 19 of the frame body 3 is a substantially concave shape with an upper opening. Not enough,
The structure of the mold when manufacturing the frame 3 is simplified.

The short side 3a of the frame 3 is located between the outer frame portion 12 and the receiving portion 15 of both the long sides 3c, 3c (hereinafter, both long sides 3c, 3c) of the frame 3. , Rails 22, 22 that are inclined upward in the direction of the other short side 3 b are provided respectively.

The rectangular manhole 1 having the above structure is
The frame 3 is embedded in the ground, and the lid body 2 is fitted to the frame 3 for use. A method of 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
6 is attached to an opening / closing handle 24 having a hooking portion 23, and a hook-shaped carriage 26 with a pair of wheels 25, for example, is hooked on the hooking portion 23 of the opening / closing handle 24, using 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 3 to serve as a fulcrum, and the packing 16 on the one short side 2a side is moved. The frame 3 is separated from the packing seat 17.

Then, when the wheels 7, 7 ride on the rail 22, and then pull the bogie 26, the wheels 7, 7 roll on the rail 22, and the lid body 2 is pulled out in the longitudinal direction and 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 main body 2 may be performed in the reverse procedure. The lid body 2 can be removed from the frame 3 after being pulled out.

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

Further, since the lid body 2 is provided with the wheels 7, 7, the lid can be opened very easily and easily as compared with a 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, wheels 7,7 are
Since the cover body 2 is provided inside the peripheral edge 8, the wheels 7, 7 do not come into contact with the frame 3 when the cover body 2 is pulled out.

Further, since the rails 22, 22 are provided in the longitudinal direction, the gradient of the rails 22 becomes very gentle, and pulling out the lid body 2 in the longitudinal direction is more difficult than pulling out the lid body 2 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
b ′ may be provided with wheels 7,... that roll in the longitudinal direction, respectively.

Specifically, the wheels 7, 7 on one short side 2a of the lid body 2
7 is slightly narrower than the distance between the rails 22, 22 on which the wheels 7 roll and the wheels 7, 7 on the one short side 2a, and the wheels 7 ', 7' are provided on the other short side 2b, and the wheels on the other short side 2b are provided. Rails 22 'and 22' on which 7 'and 7' roll are provided with an upward inclination from the other short side 2b to one short side 2a, and the center of the lid body 2 on the one short side 2a and the other short side 2b side. Handle part 6,6
Are provided respectively.

When the wheels 7,... Are provided at the four corners of the lid main body 2 as described above, the lid main body 2 can be pulled out on either one side or the other side in the longitudinal direction as shown by arrows in the drawing. There is an advantage.

In the above embodiment, the lid body 2
Is provided with a floor material storage space 5 for burying a thick finishing floor material 4, but the lid body 2 is not necessarily provided with a floor material storage space.
The cover body 2 does not have to be provided, and the cover body 2 may be formed of a simple plate having no floor material storage space 5. If the lid body 2 is formed in a mere plate shape or the like, the weight of the lid body 2 becomes relatively light, and instead of the wheels 7, 7 provided on the lid body 2, the lid body 2 is formed.
It is also possible to provide dome-shaped convex portions that can slide on the rails 22, 22 of the frame body 3 at both lower corners 2a ′, 2a ′ of the frame 3.

Further, in the above embodiment, the lid body 2
Is provided with a packing 16, but the cover body 2 is not necessarily required.
The packing 16 does not have to be provided.

In addition, the method of installing a rectangular manhole in the above-described embodiment has exemplified the case where one is installed on a sidewalk or the like. For example, when the opening 9 is extremely long, a plurality of Can be installed so as to be connected in the longitudinal direction.

In this case, as shown in FIG. 7, the first lid body 2 can be pulled out in one longitudinal direction, that is, in the direction of the second lid body 2 ', and further pulled out to the ground surface 10' on one side. , A part of the opening 9 is opened, and the second lid body 2 ′ is pulled out to one side (indicated by a two-dot chain line in the figure), and furthermore, the ground surface 10 ′
If the lid bodies 2,... Are sequentially pulled out in such a manner as to be pulled out, all the lid bodies 2,.
Will be placed on the Thus, the plurality of lid bodies 2,
Are connected in the longitudinal direction, the lid body 2 can be pulled out to one side when the opening 9 is fully opened.

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

[0038]

As described above, in the rectangular manhole according to the present invention, the wheel capable of rolling in the longitudinal direction on the rail provided on the frame body is provided on the lower surface of the lid body inside the peripheral edge of the lid body. When the lid is opened, when the lid is pulled out in the longitudinal direction while lifting one short side of the lid body upward, the wheel rolls on the rail and one side of the longitudinal direction of the rectangular manhole The lid body can be removed from the side.

Therefore, even when a rectangular manhole is installed in a place where workability is poor, the lid body can be opened and closed by one person, and the lid is removed when a long pipe is introduced. The lid itself does not get in the way. Further, since the wheels are provided inside the peripheral edge of the lid main body, the wheels can be smoothly pulled out without contacting the frame when the lid main body is pulled out. Moreover,
Since the receiving part is provided, the weight of the lid body
The load applied to the lid body is supported by the receiving part of the frame and is applied to the wheels.
There is an advantage that the wheel is not easily damaged because it is not known .

In addition, if four rollable wheels in the longitudinal direction of the lid main body are provided at four corners on the lower surface of the lid main body and located inside the peripheral edge of the lid main body, respectively, There is an advantage that the lid body can be pulled out from any direction of its longitudinal direction.

[Brief description of the 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 sectional view of a portion B in FIG. 2;

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

FIG. 5 is an enlarged sectional view of a portion C in FIG. 4;

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

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 body, 2a ... one short side, 2a ', 2b' ... both corners, 2b ... other short side, 3 ... frame, 7,7 '... wheels, 8 ... peripheral edge, 20 ... bottom face, 22 ...
rail

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 29/14 E02D 29/12

Claims (2)

(57) [Claims] In a rectangular manhole comprising a rectangular lid body (2) and a frame body (3) into which the lid body (2) is fitted, one short side of the lid body (2) is provided. 2a) Side bottom corners (2a '), (2
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 frame (3) is provided with rails (22) and (22) on which the wheels (7) and (7) can roll, and the frame (3) has And the lid body (2)
The wheels (7), (7) do not touch the bottom (20) of the frame (3).
Receiving part (15) to support the lid body (2)
A rectangular manhole characterized by becoming . 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 lower corners (2a) of the lid body (2) are provided. '), (2b'), ... include wheels (7), (7 '), ... which can roll in the longitudinal direction of the lid body (2).
Are provided inside the peripheral edge (8) of the lid body (2), while the frame (3) is provided with the wheels (7), (7 '),.
There rail capable of rolling (22), ... are provided, moreover, the
When the lid body (2) is fitted to the frame (3), the wheel
(7), ... without touching the bottom (20) of the frame (3)
(2) A rectangular manhole, which is provided with a receiving portion (15) for supporting the manhole.