KR101395414B1 - A manhole cover for multi-function - Google Patents

Abstract

The present invention relates to a rectangular manhole, which is mounted on an opening for enabling the access of equipment or people to a drain pipe buried under a structure such as a sidewalk or a road, and provides a manhole cover comprising: a box-shaped cover frame which is mounted on an opening and of which the inside is open; a cover for opening and closing the opening and mounted on the cover frame; a hinge rotated to open the cover; an inspection member coupled to the center part of the cover and detached to allow the inspection of a drain pipe; and a safety net mounted on the cover frame to prevent a fall to the opening when the cover is opened. The manhole cover of the present invention can safely mount the cover on the cover frame, prevent the damage due to physical impact when the heavy cover is opened and closed, prevent foreign substances from being introduced into the gap between the cover and the cover frame, easily inspect the drain pipe without opening the cover by installing the detachable inspection member in the center part of the cover, conveniently open the cover by installing the hinge, which rotates by 180 degrees without the protrusion of a rotary axis, on one side of the cover frame and the cover, and be safely used by preventing a fall when the cover is opened.

Description

A Manhole cover for multi-function < RTI ID = 0.0 >

The present invention relates to a multifunctional manhole cover, and more particularly to a multifunctional manhole cover which can safely open and close a lid in a lid frame, prevent damage from physical impact when a lid of a heavy object is opened and closed, It is possible to easily check the sewer pipe without opening the lid by installing an inspection port which is detached and removed from the central portion of the lid. The cover frame and the lid can be rotated 180 degrees And a safety net is provided in the lid frame to prevent a falling accident when the lid is opened, so that the multifunctional manhole cover can be safely used.

As we all know, in places where people live and operate production activities, a large amount of water is used, so that domestic sewage and industrial wastewater are increasing day by day. In case of heavy rainy season or rainy season, In this case, the rainwater flows into the sewer line. In such a case, the floatation and the soil deposited in the sewage flowing along with the rainwater as well as the living sewage flowing in the sewer pipe are naturally deposited, or the flow rate is slowed in the bent pipe or the enlarged pipe, .

In this way, the sewer pipe is inevitably becoming more important as urban activities and industrial activities become active. As the accumulation amount increases, the sewer pipe becomes gradually clogged, and when the accumulation is prolonged, the sewage flows back and deteriorates the living environment To prevent such damage, sewer installation and maintenance should be easy.

In the upper part of the sewer line, a manhole installed in a public park around a public road or a river and a river is often seen, and there is a square manhole with a circular manhole with a circular lid and a rectangular lid.

Circular manholes are mainly used for sewer pipelines of small size, and square manholes are mainly used for large-capacity sewer piping where the sewerage of branch pipelines is joined.

Since the above-described manhole is mainly used in the parks around India, roads and rivers, the sludge accumulated in the sewage pipe should be densely installed using a manhole to securely maintain the sewer line, and the lid can be easily opened and closed. In particular, in the case of a large manhole, when the cover is opened due to the nature of being installed in a public park constructed around a road or a river, the risk of a fall accident occurs frequently due to frequent movement of people or vehicles. There is a need for development.

16 is a schematic view of a conventional manhole cover in which a lid 20 is seated on a lid frame 10 at the top of a manhole formed in a sewage line and a safety net 30 is provided to prevent a safety accident when the lid 20 is opened. And is seated on the inside of the lid frame 10.

However, in the conventional manhole cover, there is a gap between the lid and the lid frame, foreign substances are introduced into the lid and the foreign material is gathered due to the movement of the vehicle, so that there is no clearance between the lid and the lid frame. So that a large amount of money is generated and an enormous obstacle to the traffic flow is caused. In addition, the use of heavy equipment has caused troubles in repairing the manhole cover and the cover frame.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned disadvantages of the prior art, and a multifunctional manhole cover according to the present invention is capable of safely opening and closing a lid on a lid frame, The cover can be conveniently opened and closed without using heavy equipment, and foreign substances can be prevented from flowing into the gap between the lid and the lid frame, and an inspection port for removing and removing the lid can be installed at the center of the lid, The cover frame and the hinge are provided at one side of the cover with a hinge capable of rotating 180 degrees without protruding the rotation shaft, so that when the cover is opened, the hinge is rotated according to the purpose of the cover to open the cover conveniently at 90 degrees or 180 degrees And a plurality of attachment / detachment fixing portions are provided on the outer periphery of the lid frame, so that the lid opening / A safety railing provided with an opening and closing door is installed on the outside of the lid to prevent a person or a vehicle from falling, so that the lid can be safely used from the risk of a fall accident when the lid is opened. The cover can be safely used by fixing the cover to the cover frame easily and a hoist device or a cover opening device for opening and closing the cover can be installed to easily open and close the cover of the heavy object To provide a multi-functional manhole cover.

A multifunctional manhole cover according to the present invention is a sewage line buried in an underground of a civil park in the vicinity of a road or a river or a river, A rectangular manhole cover which is seated in an opening portion and is formed in a box shape which is seated on the inner periphery of the opening portion and opened inside and has a lid holding end in a stepped shape on the upper side of the inner periphery, A lid frame on which a cover seat part is formed; A cover having an upper cover plate that opens and closes the opening portion and is seated at a lid holding end of the lid frame and a plate-shaped lower lid plate that seats in the lid seating portion; A hinge having one side fixed to one side of the cover by bolts and the other side being fixed to one side of the cover frame and rotated 180 degrees without protruding the rotation axis so that the cover is opened; An inspection port connected to the inserting hole penetrating the center of the lid by bolts to be detachable for inspecting the sewer line; And a safety net formed of a plurality of transverse and longitudinal members which are seated on the lid seating portion and are prevented from falling into an opening portion when the lid is opened.

A lid seating protrusion protruded upward is mounted on an upper surface of the lid seat seating portion of the lid frame. The lid frame is mounted on the outside of the lid frame with a plurality of protruding plate- A reinforcing plate member is coupled to the cover frame, and a fixed connection portion having an outer end fixed to the reinforcing plate and a screw formed at an inner end thereof is inserted into the inside of the lid frame.

An insertion hole is drilled in the lower side of the lid to insert the lid seating protrusion, and the lower lid plate is connected to the bottom of the lid by an impact preventing part to absorb an impact when opening and closing the lid.

A plate-shaped safety net mounting part is connected to an upper end of the safety net, and a contact pad is connected to the safety net mounting part when the lid is opened or closed.

And a structure detachable and fixed portion provided with a screw protection cap detachably mounted on the inner side of the structure seating hole is connected to the outer periphery of the cover frame and connected to the inside of the cover by a bolt, And a lid attaching / detaching fixture having a lid seat fixture inserted in a plurality of through holes and formed with a screw on an inner circumference and a screw protection cap detachably attached to an inner periphery of the lid seat fixture.

A lid lock part for fixing the lid to the lid frame is connected to one side of the lid attaching / detaching part, and the lid lock part is connected to the lid mount and is connected to the lid lock, And a bar-shaped cover lock bar for fixing the cover while the other side is seated on the cover and the perforations of the cover frame to move left and right.

And a connection link is connected to the inside of the fixed connection part of the lid frame so that a rope and a chain necessary for the maintenance work of the sewer pipe are connected.

The hinges are fixed on the upper side of the lid frame without protruding the rotary shaft and have a recess formed on the upper side of the lid frame. The connection hinge is hinged to the recessed portion of the fixed body and is hinged to one side. And a foreign matter blocking rubber which is installed between the rear side of the connecting hinge and the recessed portion and blocks the foreign matter from flowing into the lower portion of the rotating hinge, is composed of a rotating hinge, the other side of which is connected to a side of the cover by a bolt, .

The upper portion of the lid frame may be provided with a pillar installed on the structure attachment / detachment portion when the lid is opened, and a safety guardrail connected to the pillar to prevent a person or a vehicle from falling.

A lid opening device for opening and closing the lid by rotating the lid in one direction is connected to the upper part of the structure attachment / detachment fixing part. The lid opening device is connected to the lower side by a hinge and is vertically rotated, And a cylinder connected to one side of the connecting bar and the lid to open and close the lid by rotating the lid up and down.

The multifunctional manhole cover according to the present invention having the above-described structure has the following effects.

First, a lid frame having a latching end formed in the periphery of the opening of the sewage pipe is provided, so that the upper outer periphery of the lid is seated on the upper latching end of the lid frame to prevent foreign matter from flowing inwardly to facilitate the lid without using heavy equipment. The lid can be securely placed on the lid frame, and a plurality of lid-seating protrusions can be projected on the lower side of the lid frame, so that the lid can be seated perfectly in the right position, so that the operation of the hinge and the locking device can be smoothly performed The cover can be safely opened and closed,

Second, a reinforcing plate vertically connected to the inside of the lid frame is provided to completely fix the lid frame to the structure, and a safety net formed of a plurality of transverse members and a longitudinal member is seated inside the lid frame to open the lid It is possible to secure safety from a fall accident and to secure the work space without the need to install a separate structure in the opening portion because the safety net mounting portion is seated on the lid seating portion,

Third, the lid frame and the lid have a hinge that can be rotated 180 degrees without protruding the rotary shaft, and they can be opened by 90 degrees or 180 degrees by rotating the hinge according to the application when the lid is opened by tightening with bolts In addition,

Fourth, a check port for detaching and removing the cover is provided at the center of the cover, so that simple inspection of the sewer pipe can be easily performed without opening the cover,

Fifth, a plurality of structure attachment / detachment fixtures are provided outside the cover frame, and various kinds of fixtures such as a hoist and a balustrade can be easily installed and used according to the use,

Sixth, since the safety guardrail provided with the opening and closing door can be installed on the outside of the lid to prevent a person or a vehicle from falling, safety of opening the lid can be secured,

A cover locking part for fixing the cover to the cover frame is provided on the inner side of the cover so that the cover can be safely locked and unlocked in the cover frame,

Eighth, a cover opening device and a hoist for opening and closing the cover can be installed on the structure attachment / detachment fixing part, so that the cover of a heavy article can be easily opened and closed and moved.

1 is an outline view of a manhole cover according to the present invention.
2 is a perspective view of a manhole cover according to the present invention.
FIG. 3A is a cross-sectional view of a manhole cover according to the present invention in a state where it is installed. FIG.
FIG. 3b is a cross-sectional view of the structure in which the manhole cover is installed in the structure according to the present invention. FIG.
4 is a state in which a manhole cover is installed in a structure according to the present invention.
5 is a perspective view of a cover frame according to the present invention in which a safety net is seated.
6 is a perspective view of a cover frame according to the present invention in which a safety net is separated;
7 is a perspective view of the cover frame according to the present invention in a state in which the connecting hook is seated.
8 is a front perspective view of a lid and lid lock according to the present invention.
Figure 9 is a rear perspective view of the lid and lid lock according to the present invention.
Fig. 10 is a state diagram showing the open / close progress state of the hinge according to the present invention
11 is a perspective view of the cover according to the present invention rotated 90 degrees.
12 is a perspective view of the cover according to the present invention rotated 180 degrees.
Fig. 13 is a perspective view of a lid according to the present invention,
Figure 14 is a perspective view of a safety guardrail mounted on a lid frame according to the present invention;
15 is a perspective view showing a use state of the lid opening device according to the present invention.
16 is a schematic view showing a conventional manhole cover and a manhole cover according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3A, the multifunctional manhole cover according to the present invention is a rectangular manhole cover which is installed in an opening for allowing equipment to flow in and out through a sewage pipe buried in a lower part of a structure such as a car,

A lid 200 for opening and closing the opening 1 and a hinge 200 for rotating the lid 200 by 180 degrees without protruding the rotary shaft so as to open and close the lid 200, 300 for inspecting the sewer line, an inspection port 400 for detachment to check the sewer line, and a safety net 500 secured to the inside of the lid frame 100.

3A and 3B to FIG. 6, the lid frame 100 is formed in a box shape which is seated on the inner periphery of the opening 1 and whose inside is opened, Shaped lid 110 is formed and the lid 200 is folded to the inner edge of the lower end to form a lid seating portion 120 on which the lid 200 is seated.

A plurality of lid seating protrusions 130 protruded upward are formed on the upper surface of the lid seating portion 120 of the lid frame 100 by being punched in the lower side of the lid 200 A plurality of plate-shaped reinforcing plates 140 are coupled to the outside of the lid frame 100 so as to fix the lid frame 100 to the structure when the concrete is laid, A plurality of ring connecting portions 150 having an outer end fixed to the reinforcing plate 140 and a screw formed at an inner end thereof are inserted.

A plurality of cylindrical structural seats 161 bolted to the outer periphery of the lid frame 100 and formed with screws on the inside thereof and a screw protection cap 162 detachably mounted on the inside of the structural seats 161, And the structure attachment / detachment fixing unit 160 is fastened.

7, a connection ring 151 is screwed to the inside of the loop connection part 150 of the cover frame 100 so that the rope and the chain are connected.

8 and 9, the lid 200 includes a plate-shaped upper cover plate 210 that opens and closes the opening 1 and is seated on the lid holding end 110 of the lid frame 100, Shaped upper cover plate 220 and a cover frame 230 for supporting the upper cover plate 210 and the lower cover plate 220.

A locking part connecting hole 271 formed in the inner side of the lid 200 and having a screw on the inner circumference of the through hole and a screw protection cap 272 detachably attached to the inner circumference of the locking part connecting hole 271, (Not shown).

9 and 3A and 3B, a lid lock part 280 for fixing the lid 200 to the lid frame 100 is connected to one side of the lock part connecting member 270, The cover 280 is connected to the locking part connecting hole 271 and is rotatably coupled to the locking part 281. The locking part 280 is connected to the locking part 281 and the cover part 200 and the cover frame 100 Like lid lock bar 282 which is seated on the perforation of the lid frame 100 and is laterally moved to fix the lid 200 to the lid frame 100.

An insertion hole 240 is bored in the lower side of the lid 200 so that the lid seating protrusion 130 is inserted into the lower lid plate 220. When the lid 200 is opened and closed, The impact preventing portion 250 is connected so that the impact is absorbed.

10 and 12, the hinge 300 is bolted to one side of the lid 200 and the other side is fastened to one side of the lid frame 100 in a pin shape, A fixing body 310 fixed to the upper side of the cover frame 100 and having a recessed portion 311 formed thereon and a hinge connected to the recessed portion 311 of the fixing body 310, A rotating hinge 330 which is hinged on one side of the connection hinge 320 and the other side of which is connected to one side of the lid 200 by bolts and a rotation hinge 330 on which the connection hinge 320 is connected, And a foreign matter blocking rubber 340 interposed between the rear side and the recessed portion 311 to block foreign substances from flowing into the lower portion of the rotary hinge 330.

13, the inspection port 400 is bolted to an insertion hole 410 penetrating a central portion of the lid 200, and is detached to check the sewer pipe.

3A and 3B to 6, the safety net 500 is formed of a plurality of transverse members and a longitudinal member so as to be seated on the lid seating portion 120 and to prevent the lid 200 from falling into the opening portion when the lid 200 is opened .

A safety net seating part 510 is connected to the upper end edge of the safety net 500 so as to be seated on the cover seating part 120. Inside the impact prevention part 250 of the cover 200, It is also preferable that the adhesion pad 260 is connected to the safety net seating part 510 when the cover 200 is opened or closed.

14, the upper part of the lid frame 100 is provided with a support 610 installed on the structure detachment / securing part 160 when the lid 200 is opened and a support 610 connected to the support 610, It is also possible to install the safety guardrail 600 made of the pans 620 to prevent fall.

15, a lid opening device 700 for opening and closing the lid 200 by rotating the lid 200 in one direction is connected to the upper side of the structure detachable fixing part 160,

The lid opening device 700 includes a connecting bar 710 having a lower portion hingedly connected to the upper portion of the connecting bar 710 and rotated up and down and having one side connected to a chain or a rope, And a cylinder 720 that opens and closes the lid 200 by rotating the lid 200 up and down.

Hereinafter, the operation of the multifunctional manhole cover according to the present invention will be described.

As shown in FIGS. 1 to 3A, the multifunctional manhole cover according to the present invention is a multi-function manhole cover having a box shape (not shown) on the inner periphery of an opening 1 for allowing equipment to flow in and out of a sewage line, And a lid 200 for opening and closing the opening 1 is seated on the inside of the lid frame 100. The lid 200 is fastened to one side of the lid 200 with a bolt, The hinge 300 is rotated 180 degrees without the hinge 300 being seated in the recessed portion of the lid 200 and the cover frame 100 to open and close the lid 200 while being rotated.

3A to 6, the lid frame 100 is seated on the inner periphery of the opening 1 of the sewer pipe, and on the inner periphery of the lid frame 100, a lid- When the lid 200 is closed, the upper lid plate 210 is seated on the lid 110, and there is no gap between the lid 200 and the lid frame 100, It is possible to prevent the cover 200 from being opened due to foreign substances.

The lid 120 can be securely mounted on the lower side of the lid frame 100 by being integrally formed with an inwardly bent lid seating part 120. The lid 120 can be securely mounted on the lid seating part 120, The lid 200 can be seated in the correct position by projecting the lid seat protrusion 130 inserted into the insertion hole 240 penetrating through the inner surface of the lower surface of the hatch so that the operation of the hinge and the lock can be smoothly performed.

A plurality of plate-like reinforcing plates 140 are vertically connected to the outer circumference of the lid frame 100 so that the concrete pouring material is coupled to the reinforcing plate 140 when the concrete is poured, It is perfectly fixed.

A safety net 160 formed of a plurality of transverse members and a longitudinal member is seated inside the lid frame 100 to prevent an accident that the lid 200 falls down on the opening when the lid 200 is opened.

A safety net seating part 510 in the form of a plate is connected to the upper end outer edge of the safety net 160 so as to be easily seated in the lid seating part 120. Inside the impact prevention part 250 of the lid 200, The safety net 160 is firmly fixed to the safety net seating part 510 when the lid 200 is closed and the safety net 160 is fixed firmly to the safety net 160 are seated on the lid seating portion 120, so that the entire space of the opening 1 can be conveniently used.

As shown in FIGS. 9 and 13, the inspection hole 400 is bolted to the through hole at the center of the lid 200, so that the sewer pipe can be very easily checked without opening the lid 200.

3A, 3B, and 7, a structure detachable fixing part 160, which is bolted to the outer circumference of the lid frame 100, is equipped with a plurality of cylindrical structure supporting holes 161 having screws formed therein, And a plurality of screw protection caps 162 that are detachable in the form of a screw are seated on the inner side of the structure seating hole 161 to prevent the screws from being damaged. have.

3B and 9, on the upper surface of the lid 200 opening / closing the opening 1, a locking part connecting member 270 inserted in a plurality of through holes and formed with a screw on the inner circumference and detachable from the screw It can be used conveniently by connecting the handle or mechanism.

A lid lock part 280 for fixing the lid 200 to the lid frame 100 is connected to the lower side of the lock part connecting member 270.

That is, when the lid lock connected to the lid seat access hole 610 is rotated to the left and right using the mechanism, the lid lock part 280 is connected to the lid lock hinge 631 at one side, Shaped lid lock bar 632 seated on the perforations of the lid 200 and the lid frame 100 is moved to the left and right to securely close and close the lid 200 so that the lid can be safely opened and closed.

10 to 12, the hinge 300 is rotatable 180 degrees without protruding the rotary shaft, and is fixed to one side of the lid 200 and a cutout 311 cut at one side of the lid frame 100, The cover 200 is fastened by bolts to one side of the cover 200 and the other side is hinged to one side of the cover frame 100 to rotate the cover 200 to open.

At this time, the hinge 300 is securely fixed to the upper side of the lid frame 100 with the recessed portion 311 formed on the upper side thereof, and the hinge 300 is fixed to the hinge 300 at one side of the recessed portion 311 of the fixed body 310, And a rotary hinge 330 on which one side is hingedly connected to the connection hinge 320 and the other side is connected to one side of the lid 200 with a bolt is seated, The cover 330 and the connection hinge 320 are rotated while being interlocked with each other so that the cover can be opened 180 degrees without protruding the rotation shaft.

A foreign matter blocking rubber 340 is provided between the rear side of the connection hinge 320 and the insertion part 311 to prevent foreign matter from flowing into the lower portion of the rotation hinge 330.

11, when the foreign matter blocking rubber 340 is inserted into the rear side of the insertion part 311 and the rotation hinge 330 is opened only at the maximum right angle, The foreign substance blocking rubber 340 inserted into the rear side of the recessed portion 311 is separated and the rotary hinge 330 is rotated 180 degrees in Fig. 12 when the lid 200 is opened at 180 degrees. So that the manhole is completely opened so that the sewage pipe can be easily remodeled or dredged equipment can be introduced.

14, a safety railing 600 is installed on the upper part of the structure detachable fixing part 160. The safety railing 600 is installed when the lid 200 is opened, After the screw protection cap 162 is disassembled, a bar-like support 610 is installed and a fuse 620 having an opening and closing door is connected to the support 610 to prevent a safety accident in which a person or a vehicle falls down .

15, a cover opening device 700 for opening and closing the lid 200 by rotating the lid 200 in one direction is connected to the structure detachable fixing part 160 so that the lid can be rotated only upward by using the cylinder 742, .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

100: lid frame 110: lid latching end 120: lid seat part
130: lid seat protrusion 140: reinforcing plate 150:
151: connecting collar 160: structure detachable fixing part 161:
162: screw protection cap 200: cover 201: seat groove
210: upper cover plate 220: lower cover plate 230: cover frame
240: Insertion hole 250: Impact prevention part 260: Clamping pad
270: locking portion connecting member 271: locking portion connecting port 272: screw protecting cap
280: cover lock 281: cover lock 283: cover lock rod
300: hinge 310: fixing body 311:
320: connecting hinge 330: rotating hinge 340: foreign matter blocking rubber
400: Checkpoint 500: Safety net 510: Safety net seat
600: safety guardrail 610: support 620: fence
700: cover opening device 710: connecting bar 720: cylinder

Claims (10)

A rectangular manhole cover which is installed in an opening for allowing equipment to flow in and out through a sewage line buried in a lower part of a structure such as a road or a roadway,
A lid seating portion 110 having a stepped shape is formed on the upper side of the inner periphery and a lid seating portion 120 bent at the lower side inner periphery is formed in a box shape which is seated on the inner periphery of the opening 1, A cover frame 100 on which the cover frame 100 is formed;
An upper cover plate 210 that opens and closes the opening 1 and is seated on a lid holding end 110 of the lid frame 100 and a lower plate 220 that is mounted on the lid seating portion 120 A cover 200 provided with a cover 200;
The other end of the hinge 300 is fastened with bolts to one side of the cover 200 and the other side is fastened with bolts to one side of the cover frame 100 and rotated 180 degrees without protruding the rotation shaft to open the cover 200. [ and;
An inspection port 400 which is bolted to an insertion hole 410 penetrating a central portion of the lid 200 and is detached and detached to check the sewer line;
And a safety net 500 formed of a plurality of transverse members and a longitudinal member so as to be prevented from being accidentally caught in the lid seating portion 120 and falling down to the opening portion when the lid 200 is opened,
A plurality of cylindrical structural seats 161 bolted to the outer periphery of the lid frame 100 and formed with screws on the inside thereof and a screw protection cap 162 detachably attached to an inner screw of the structure seating opening 161, (Not shown) is connected,
A locking part connecting hole 271 formed in the inner side of the cover 200 and having a screw on the inner circumference and inserted into a plurality of through holes and a screw protection cap 272 attached to and detached from the inner circumferential screw of the locking part connecting hole 271 Wherein the handle and the eyelet can be attached to the multi-function manhole cover.
The method according to claim 1,
A lid seating protrusion 130 protruded upward is formed on an upper surface of the lid seating portion 120 of the lid frame 100 to be inserted into an insertion hole A plurality of plate-shaped reinforcing plate members 140 are coupled to the outside of the lid frame 100 so as to firmly fix the lid frame 100 to the structure when the concrete is laid, 100) has a ring connecting portion (150) having an outer end fixed to the upper side of the reinforcing plate (140) and a screw formed at an inner end thereof. 3. The method according to claim 1 or 2,
Wherein a shock absorber (250) of a plate shape is mounted on the lower surface of the lower cover plate (220) of the lid (200) so as to absorb an impact when opening and closing the lid (200).
The method of claim 3,
A safety net mounting portion 510 of a plate shape is connected to an upper end of the safety net 500 so as to be seated on the cover mounting portion 120,
Wherein a contact pad 260 is connected to the inside of the impact preventing part 250 of the lid 200 so as to be in close contact with the safety net receiving part 510 when the lid 200 is opened or closed.
delete The method according to claim 1,
A lid lock part 280 for fixing the lid 200 to the lid frame 100 is connected to one side of the lock part connecting member 270,
The lid lock part 280 is connected to the lock part connecting part 271 and is connected to the lid lock part 281. The lid lock part 281 is connected to the lock part connecting part 271, And a bar-shaped cover lock rod (282) which is seated on the perforations of the cover frame (100) and is laterally moved to fix the cover (200) to the cover frame (100).
3. The method of claim 2,
Wherein a connection ring (151) is detachably attached to the inside of the loop connection part (150) of the cover frame (100) so that a handle, a rope and a chain are connected.
The method according to claim 1,
The hinge 300 may include a fixed body 310 rotatable 180 degrees without protruding the rotary shaft and fixed on the upper side of the cover frame 100 and having a concave portion 311 formed thereon, A connecting hinge 320 which is hingedly connected to the recessed part 311 and a rotary hinge 320 having one side hinged to the connecting hinge 320 and the other side connected to one side of the lid 200 by bolts, And a foreign matter blocking rubber 340 interposed between the rear side of the connection hinge 320 and the insertion part 311 to block foreign substances from entering the rotation hinge 330 Features a multifunctional manhole cover.
The method according to claim 1,
The upper part of the lid frame 100 is connected to a support 610 which is installed on the structure detachment / securing part 160 when the lid 200 is opened and a support 610 connected to the support 610 to prevent a person or a vehicle from falling And a safety guardrail (600) made of pans (620).
The method according to claim 1,
A lid opening device 700 for opening and closing the lid 200 by rotating the lid 200 in one direction is connected to the upper part of the structure detachable fixing part 160,
The lid opening device 700 includes a connecting bar 710 having a lower portion hingedly connected to the upper portion of the connecting bar 710 and rotated up and down and having one side connected to a chain or a rope, And a cylinder (720) for opening and closing the lid (200) by rotating the lid (200) upward and downward.

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