KR102297107B1 - A Circle manhole cover of circle with switchgear - Google Patents

Abstract

The present invention relates to a circular manhole cover, which is seated in an opening portion for equipment or a person to enter a sewage pipe buried in one side of a sidewalk or driveway. The circular manhole cover comprises: a frame seated in the opening portion; a cover seated to open and close the opening portion on an upper side of the frame; an open arm assembly seated on the frame to rotate; a worm gear opening device formed as a gear device rotated by being engaged with a gear to rotate the opening arm assembly; a portable electric drill connected to an upper portion of the opening device to open and close the cover; and a hinge portion seated on the frame to open and close the cover. The frame formed in multiple stages can be provided on the inner periphery of the opening portion of a sewage pipe to prevent foreign substances from entering the inside, so that the cover can be safely and easily opened and closed without obstacles when the cover is opened. The opening arm assembly for opening the cover can be provided so that the cover can be partially or fully opened. The worm gear opening device for opening and closing the cover can be provided on one side of the outside of the frame and can be driven with the portable electric drill so that the cover can be easily opened and closed without separate external power. A safety fence can be easily mounted to prevent safety accidents. The rotation of the cover can be prevented so that the abrasion caused by the friction between the cover and the frame can be prevented.

Description

A Circle manhole cover of circle with switchgear}

The present invention relates to a circular manhole cover equipped with an opening/closing device, and more particularly, by providing a cover on a frame formed in multiple stages to prevent foreign substances from entering the inner periphery of an opening of a sewage pipe to the inside, thereby providing a foreign substance between the frame and the cover By preventing this sticking phenomenon, the cover can be easily opened and closed without an opening obstruction, and an opening arm that opens the cover can be provided to partially open and fully open the cover while rotating the cover up and down, and on one side of the outside of the frame An opening device for opening and closing the cover is provided, and a socket connector for driving the opening device is provided so that the cover can be easily opened and closed with a portable electric drill, and abrasion due to friction between the cover and the frame is prevented by preventing the rotation of the cover. It relates to a round manhole cover equipped with a retractable switchgear.

As is well known, where a large amount of water is used in places where humans live and engage in production activities, domestic sewage and industrial wastewater are increasing day by day. Rainwater flows into the sewer pipe, and in this case, the floating matter or soil carried in the sewage that flows down with the rainwater as well as the domestic sewage flowing in the sewer pipe naturally accumulates, or the flow rate is slowed down in a curved pipe or an enlarged pipe, so that the floating substances or soil will be deposited

As such, in any case, the sewage pipe is very important as urban and industrial activities become more active. It is an essential element in creating an urban environment. As the amount of sediment increases, the sewage pipe gradually becomes clogged. In order to prevent damage, the installation and maintenance of sewage pipes should be easy.

In the upper part of the sewer pipe, manholes installed in public roads, sidewalks, and citizen parks around rivers are often seen, and there are a round manhole cover with a circular cover and a square manhole cover with a rectangular cover.

The round manhole cover is mainly used for the upper part of the branch pipe of a small size in the sewage pipe, and the square manhole cover is mainly used for the large-capacity collecting pipe where the sewage of the branch pipe joins.

Manholes as described above are often installed on sidewalks, bicycle paths near roads and rivers, and parks and green spaces. For dredging the sludge accumulated in the sewage pipe using the manhole, or for maintenance of the sewage pipe, it should be installed easily and safely. In particular, in the case of a circular manhole, the risk of a fall accident is very high due to the frequent movement of people or vehicles when the cover is opened due to the nature of being installed in general roads or in residential and commercial buildings where people enter frequently. The need to develop a manhole equipped with a quick opening and safety device is emerging.

Figure 16 is a schematic view showing a conventional circular manhole cover, the cover (2) is seated on the cover frame (1) on the upper part of the opening formed in the sewage pipe.

However, the conventional circular manhole cover does not have a step between the cover and the cover frame, so foreign materials are introduced and the foreign materials are compacted by the movement of vehicles, etc. Due to the method in which the cover has to be completely separated from the frame, there is a risk of safety accidents and a lot of inconvenience in quick inspection and maintenance and repair of sewage pipes.

In order to improve the above problems, the applicant of the present invention released and patented a multifunctional safety manhole cover to improve the square box-shaped manhole cover, and the multifunctional manhole cover is, as shown in FIG. A box-shaped cover frame seated in the opening and having an open inside, a cover that opens and closes the opening and is seated on the cover frame, and a hinge pin moving device having a rotational opening and locking function and a separating function so that the cover is opened; , a cover frame that can be opened without the help of heavy equipment, an inspection port detachable to check the sewage pipe, and a safety net to prevent an accident from falling into the opening when the cover is opened, so that the cover can be safely opened and closed on the cover frame, , When opening and closing the cover of heavy objects, it can prevent damage from physical impact in advance, prevent foreign substances from entering the gap between the cover and cover frame, and inspect the sewage pipe very easily without opening the cover. In addition, a hinge pin moving device is provided on one side of the inside of the cover, so that the cover can be conveniently opened without a hinge.

However, the prior art has a problem in that it takes a lot of time to open and close the cover by combining various opening tools, and in the case of a circular manhole cover, there was a problem in applying the technique in the structure of the manhole cover.

The present invention was created in consideration of the disadvantages of the prior art as described above, and the present invention is provided with a cover on a frame formed in multiple stages to prevent foreign substances from entering the inner periphery of an opening of a sewage pipe to the inside, thereby providing a cover and a frame Since foreign matter is not accumulated between A worm gear opening device for opening and closing the cover is provided on one side, and a socket connector for driving the worm gear opening device is provided so that the cover can be easily opened and closed using a portable electric drill, and the cover and frame are prevented from rotating the cover It is to provide a circular manhole cover equipped with an opening/closing device that can be used while preventing the abrasion of the frame and the cover caused by the friction of the

The present invention is a means for achieving the above object, and the circular manhole cover equipped with the opening and closing device according to the present invention is a sewage pipe buried on one side of a sidewalk or a driveway, and is seated in an opening for equipment or people to enter and exit. In the upper manhole cover, a ring-shaped opening seating portion so as to be seated on the outer periphery of the opening, a cover seating portion extending upwardly of the opening seating portion and having a multi-stage engaging protrusion formed therein, and on both sides of the rear surface of the cover seating portion A frame formed with a penetrating opening/closing fitting and a hinge mounting hole recessed from the upper side to the lower side of the rear surface of the cover receiving unit, and a cover formed with an inclined mounting unit in close contact with the cover receiving unit to open and close the opening at the upper side of the frame, and the frame; An opening arm seated on the opening and closing fitting of the worm gear opening device to rotate the cover, a worm gear opening device fastened to one side of the opening and closing fixture to engage and rotate with a gear to rotate the opening arm, One side is mounted with a hinge of the frame It is fastened to the sphere, and the other side is integrally connected with the cover, characterized in that it is composed of a hinge part for opening and closing the cover.

A guide rail that is recessed and detached from one side to the other side is formed on the inside of the cover so that the open arm is slid back and forth, and a slide incision cut on both sides to prevent the separation of the open arm to guide the guide rail is formed in front of the guide rail. is formed, and fastening portions for attaching and detaching the guide rail to the inside of the cover with bolts are formed on both sides of the guide rail.

The open arm is seated on both sides of the opening/closing fitting of the frame, and a pair of connecting rods having a concave portion formed inside while being fastened with the worm gear opening device and rotating, and a fastening portion cut to be fastened with a bolt to the connecting rod are formed to open and close the cover A shaft rotated so as to be rotated, one side is connected to the shaft and rotates up and down and the other side is a bar-shaped main arm with a movable cutout, and a moving groove is formed so that one side is rotated along the movable cutout of the main arm to move back and forth. A moving arm, a guide roller seated in the concave portion formed on the other side of the moving arm and connected with a pin so as to move along the slide cutout of the cover, and a moving arm replacement pin for mutually fastening the main arm and the moving arm; It is characterized in that it is provided with a moving arm restraint pin for controlling the movement of the stand.

The worm gear opening device includes a worm wheel driven by forming a gear inside a box-shaped gear case in which a gear is seated on one side of the outside of the frame, and a worm gear so that it is vertically installed and rotated in engagement with the gear of the worm wheel at a predetermined reduction ratio. characterized by being

A foreign material prevention cap is provided on the upper portion of the gear case of the worm gear opening device to prevent the inflow of foreign substances, and a socket connection port connected to the worm gear is provided inside the foreign material prevention cap, and a portable electric drill is provided on the upper side of the socket connection port. It is characterized in that an electric drill socket is provided to be connected.

The hinge portion includes a frame hinge in which a pin-shaped main pin is connected to the hinge mounting hole of the frame and perforations are formed on both sides of the main pin so that one side is rotatably connected, and the other side of the frame hinge has a pin shape. is connected to the sub-pin, and a cover hinge is connected to the sub-pin to sequentially open the cover by 180 degrees.

The circular manhole cover equipped with the opening and closing device according to the present invention having the above configuration has the following effects.

First, the frame formed in multiple stages on the inner periphery of the opening of the sewage pipe is provided with a cover to prevent foreign substances from entering, thereby preventing foreign substances from accumulating between the cover and the frame, thereby preventing the sticking phenomenon between the cover and the frame. Can be opened and closed easily.

Second, by having an opening arm for opening the cover on the inside of the cover and the frame, it is possible to partially open and close the cover while rotating the cover up and down, as well as to completely open the cover.

Third, a worm gear opening device for opening and closing the cover is provided on the outside of the frame, and a socket connector is provided to drive the worm gear opening device, thereby driving the opening device with a portable electric drill to easily open and close the cover. By using a portable electric drill, the cover can be opened and closed without involving a separate external power source.

Fourth, a lock nut is provided inside the frame to prevent the opening of the cover by fastening the bolt, and the anti-rotation protrusion protruding inside the frame is formed to prevent the cover from rotating, resulting in friction between the cover and the frame. It can be used to prevent wear caused by it.

Fifth, it is possible to prevent a safety accident due to a pedestrian's foot jam in advance by providing a hinge part that rotates 180 degrees without external protrusion of the rotation shaft on one side of the cover and the frame.

Sixth, by installing a safety net that blocks the opening while detaching from the upper part of the frame, it is possible to prevent an accident in which the operator falls into the sewer pipe when the cover is opened for inspection.

Seventh, it is possible to prevent accidents in which pedestrians and workers fall into the sewer pipe when the cover is opened for a long time for maintenance and inspection of the sewage pipe by installing a safety fence that blocks the opening while being detachable from the upper part of the frame.

Eighth, it is possible to secure the entry and exit space as much as possible by simply installing the safety ladder vertically on the inside of the frame and the safety fence, so that the operator can safely enter and exit the sewer pipe.

1 is a schematic view of a circular manhole cover equipped with an opening and closing device according to the present invention is installed.
Figure 2 is a schematic view of a circular manhole cover equipped with an opening and closing device according to the present invention.
Figure 3 is a partial view of a circular manhole cover equipped with an opening and closing device according to the present invention.
4 is a state diagram showing a frame according to the present invention.
Figure 5 is a state diagram opened with a portable electric drill on the manhole cover according to the present invention.
Figure 6 is a state diagram showing the fully opened hinge of the manhole cover according to the present invention.
Figure 7 is a schematic diagram showing the component configuration of the open arm according to the present invention.
8 is a schematic view showing the worm gear opening device according to the present invention.
9 is a state diagram in which a safety fence and a safety ladder according to the present invention are mounted.
10 is a schematic diagram showing a safety fence according to the present invention.
11 is a state diagram in which the safety net according to the present invention is mounted.
Fig. 12 is a schematic view showing a cover according to the present invention;
13 is a state diagram showing a state in which the cover and the frame according to the present invention are coupled.
14 is a state diagram showing an open state of the cover and the frame according to the present invention.
Figure 15 is a schematic view showing the sequential operation state of the hinge unit according to the present invention.
Figure 16 is a state diagram showing the shape and cross section of the existing circular manhole cover.
Figure 17 is a schematic diagram showing the patented safety manhole cover of the present application.

Hereinafter, a preferred embodiment of a circular manhole cover equipped with an opening and closing device according to the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the circular manhole cover equipped with the opening and closing device according to the present invention is a sewage pipe buried on one side of a sidewalk or road, and a circular manhole cover that is seated in an opening for equipment or people to enter and exit. As such, the frame 10 seated on the outer periphery of the opening, the lid 20 for opening and closing the opening from the upper side of the frame 10, and the opening arm for opening and closing the lid 20 in a sequential interlocking manner ( 30), a worm gear opening device 40 for opening and closing the cover 20, and a hinge part 50 for completely opening the cover 20.

3 and 4, the frame 10 has an opening seating part 11 formed in a ring shape so as to be seated on the outer periphery of the opening, and a multi-stage locking jaw extending upward from the opening seating part 11 on the inside. The formed cover seating portion 12, opening and closing mounting holes 13 penetrating both sides of the rear surface of the cover seating portion 12, and hinge mounting holes 14 recessed from the upper side to the lower side of the rear surface of the cover seating portion 12 ) is formed.

3 and 11 to 12, the cover 20 opens and closes the opening at the upper side of the frame 10, the outer periphery of the inclined seating portion 21 is inclined so as to be in close contact with the cover seating portion 12 is formed, and inside the cover 20, a guide rail 22 is recessed from one side to the other so that the open arm 30 slides back and forth, and a guide rail 22 is seated, and the open arm is in front of the guide rail 22. Slide incisions 23 cut on both sides are formed to guide while preventing the separation of the said 30, and the guide rollers 35 of the open arms 30 are fastened to the inside of the slide incisions 23. The guide rail fastening holes 26 for attaching and detaching the guide rail 22 to the inside of the cover 20 with bolts are formed on both sides of the guide rail 22 .

5 and 7, the opening arm 30 is seated on both sides of the opening/closing fitting 13 of the frame 10, and is engaged with the worm gear opening device 40 and rotated while having a concave portion 31a on the inside. A pair of connecting rods 31 formed and a fastening portion 32a cut to be fastened with a bolt to the concave portion 31a of the connecting rod 31 is formed, and the shaft 32 is rotated to open and close the cover 20 And, one side is connected to the shaft 32 and rotates up and down and the other side slides back and forth so that the bar-shaped main arm rest 33 is formed with a moving incision 33a, and one side is the moving incision of the main arm rest 33 . A moving arm rest 34 having a moving groove 34a to move back and forth while rotating along the portion 33a, and a slide cutout portion of the cover 20 seated in a concave portion formed on the other side of the moving arm stand 34 ( 23) is composed of a guide roller 35 connected with a pin to move along, and a movement for mutually fastening one side of the moving cutout 33a of the main arm stand 33 and the moving groove 34a of the moving arm stand 34 An arm replacement pin 37 and a moving arm restraint pin 36 for controlling the movement of the moving arm stand 34 are formed.

5 and 8, the worm gear opening device 40 is seated on one side of the opening/closing fitting 13 of the frame 10 and is connected to one side of the connecting rod 31 of the opening arm 30, and the shaft ( 32) is formed as a gear device that is rotated by being meshed with a gear to rotate.

That is, the worm gear opening device 40 is connected to the connecting rod 31 inside the box-shaped gear case 43 seated on one side of the outer periphery of the frame 10, and the worm wheel 41 is formed with a gear on the outer periphery. and a worm gear 42 that is installed and driven so as to be vertically rotated in engagement with the gear of the worm wheel 41 at a predetermined reduction ratio, and a socket connector 44 is fastened to the upper portion of the worm gear 42 .

In addition, a foreign object prevention cap 45 is provided on the upper portion of the gear case 43 to prevent foreign matter from being introduced, and a socket connector 44 connected to the worm gear 42 inside the foreign object prevention cap 45 is provided. is fastened, and an electric drill socket 61 is provided so that the portable electric drill 60 is connected to the socket connector 44 .

6 and 15, the hinge part 50 is fastened with a pin-shaped main pin 51a to be seated on the hinge mounting hole 14 of the frame 10, and the frame hinge 51 is attached to the main pin 51a. ) is fastened, a sub pin 52a is fastened to the other side of the frame hinge 51, and a cover hinge 52 provided on the rear surface of the cover 20 is sequentially fastened to the sub pin 52a. The cover 20 is formed to open 180 degrees from the frame 10 without external protrusion of the rotating shaft.

13 to 14, a lock nut 16 having a screw formed therein so that a lock bolt 17 for fixing the cover 20 is seated is provided on the inside of the front side of the frame 10, and the cover ( 20), a bolt seating hole 28 is formed opposite to the lock nut 16 so that the lock bolt 17 is seated, and a recessed cover fixing groove 24 is provided at the rear of the cover. When 20 is closed, the locking protrusion 18 of the frame 10 is in close contact with the cover fixing groove 24, and the locking bolt 17 is fastened to the locking nut 16 of the frame 10 to close the cover 20 ) is formed to be firmly fixed, and the lower side of the locking protrusion 18 has a cover guide protruding obliquely so that the lower side prevents interference with the frame 10 when the cover 20 is opened and closed and is seated in the correct position to guide it. A jaw 19 is provided.

In addition, anti-rotation protrusions 15 protruding to prevent the cover 20 from rotating when seated are provided on both sides of the front inner side of the frame 10 , and on both sides of the inner front outer periphery of the cover 20 , the The anti-rotation protrusion 15 is seated to prevent the cover 20 from being rotated, and the anti-rotation seat 25 is formed opposite to the anti-rotation protrusion 15 to prevent the rotation of the cover 20 and the frame 10. It is shaped to prevent wear by preventing friction and preventing rotation.

11, the upper portion of the frame 10 is configured to fasten the safety net 90 with the safety net fastening bolt 91 to ensure safety when the cover 20 is opened for inspection of the sewage pipe.

9, a safety fence 70 is installed on the upper portion of the frame 10 to ensure the safety of pedestrians and workers when the cover 20 is opened for a long time for maintenance and inspection of the sewage pipe, and the safety The fence 70 has a safety fence frame 71 provided with an angle-shaped fence seating hole 71a on the upper portion of the cover seating portion 12 of the frame 10 to restrict left and right movement, and the length is at the rear thereof. The length adjustment clip 73, which is controlled, is firmly fastened to the shaft 32 of the open arm 30, and the front is the fence fastener 72 seated on the frame 10, and the fence fastener bolt 75. It is securely fastened to the lock nut 16 provided in the frame 10 with the help of a locking nut 16, and a door 74 that opens and closes to ensure safety when a worker enters and exits the sewer pipe is formed in front of the safety fence frame 71.

In addition, inside the safety fence 70, a portable safety ladder 80 used by fastening the connection ring 81 to the shaft 32 to prevent a worker from falling when entering and exiting the sewage pipe is vertically installed, In FIG. 11 , it is also preferable that a mesh-shaped safety net 90 is provided inside the cover seat 12 of the frame 10 to ensure safety when the cover 20 is opened for inspection.

The operation of the circular manhole cover equipped with the opening/closing device according to the present invention configured as described above is as follows.

As shown in FIGS. 1 to 3, the circular manhole cover equipped with the opening and closing device according to the present invention is a sewage pipe buried on one side of a sidewalk or road, and a circular manhole cover that is seated in an opening for equipment or people to enter and exit. As a result, the circular frame 10 is seated on the outer periphery of the opening, the cover 20 covering the upper side of the frame 10 opens and closes the opening, and the open arm on the inside of the frame 10 ( 30) is seated to open and close the cover 20, and a worm gear opening device 40 is provided to open and close the cover 20, so that the cover 20 can be conveniently opened and closed with a portable electric drill 60, , a hinge portion 50 for hinge-connecting the frame 10 and the cover 20 is provided to completely open the cover 20 by 180 degrees without protrusion of the normal rotation shaft.

That is, in FIG. 4 , the frame 10 is provided with a ring-shaped opening seating part 11 to be seated on the outer periphery of the opening, and extends upward of the opening seating part 11 to the inside of the multi-stage locking jaw. The cover seating portion 12 is formed and the cover 20 is in close contact with the inside to open and close, and the opening and closing fittings 13 penetrating through both sides of the rear surface of the cover seating portion 12 are formed to open and close the cover 20 . The armpit 30 is connected, and a hinge mounting hole 14 recessed from the upper side to the lower side of the rear surface of the cover seating part 12 is formed, so that the hinge part 50 is seated therein.

3 and 12 , the cover 20 opens and closes the opening at the upper side of the frame 10 , and an inclined seating part 21 with an inwardly inclined outer periphery is formed, so that the cover seating part of the frame 10 is formed. It is securely seated in close contact with (12).

That is, on the inside of the cover 20, a guide rail 22 recessed and seated from one side to the other is formed, so that the open arm 30 is easily slid back and forth, and the front of the guide rail 22 is on both sides. The slide incision 23 is formed to guide safely while preventing the detachment of the open arm otsay 30, and the guide roller 35 of the open arm otsay 30 is inside the slide incision 23. ) is guided so that the cover 20 can be easily opened and closed.

In addition, guide rail fasteners 26 for attaching and detaching the guide rail 22 with bolts are formed on both sides of the guide rail 22 so that the guide rail 22 may be damaged by a physical impact. In this case, it can be conveniently removed for repair and replacement.

5 and 8, the gear device of the worm gear opening device 40 is connected to the connecting rod 31 at one side of the outer periphery of the frame 10, and a worm wheel 41 having a gear formed on the outer periphery is seated, the worm wheel The worm gear 42 is embedded in the gear case 43 so that it is vertically installed and rotated while being engaged with the gear of 41 at a predetermined reduction ratio, and the socket connector 44 is fastened to the upper side of the worm gear 42 to provide a portable electric drill By connecting to the electric drill socket 61 provided in the 60, it is possible to conveniently open and close the cover 20 without a separate external power.

6 and 7, the opening arm 30 is seated on both sides of the opening and closing fittings 13 of the frame 10, and a pair of connecting rods 31 having recessed portions 31a on the inside is a worm gear opening device. It is rotated in connection with the connecting rod 31, and the shaft 32 having a fastening part 32a cut to be fastened with a bolt is fastened to the concave part 31a of the connecting rod 31 and rotates to open and close the cover 20. do.

In addition, the bar-shaped main arm rest 33 having one side connected to the shaft 32 and rotating up and down is formed with a moving cutout 33a so that the other side slides back and forth, so that the main arm rest 33 moves on one side. The moving arm rest 34 having a moving groove 34a is connected to move back and forth while rotating along the cutout 33a and is moved back and forth while rotating, and is seated in the concave portion formed on the other side of the moving arm unit 34 and the cover It is provided with a guide roller 35 connected with a pin so as to move along the slide cutout 23 of the 20 and opens and closes the cover 20 while easily rotating it up and down.

At this time, a moving arm replacement pin 37 for mutually fastening through the moving cutout 33a of the main arm 33 and the moving groove 34a of the moving arm 34 is provided to completely open the cover 20. In this case, the moving arm arm restraint pin 36 is separated and the moving arm arm 34 is rotated and moved to completely open the cover 20, and when the cover 20 is closed, the moving arm arm restraint pin 36 is returned to its original position. By re-fastening, the distance between the main arm arm 33 and the moving arm arm 34 is limited only as much as the distance of the moving groove 34a, and the angle is also changed so that the cover 20 is prevented from being detached and 180 degrees of full opening is made. do.

6 and 15, the hinge part 50 is fastened with a pin-shaped main pin 51a to be seated on the hinge mounting hole 14 of the frame 10, and the main pin 51a has a frame hinge 51. is fastened to one side of the frame hinge 51, a sub-pin 52a is fastened to the other side of the frame hinge 51, and a cover hinge 52 provided on the rear surface of the cover 20 is sequentially fastened to the sub-pin 52a. (20) can be opened 180 degrees without external protrusion of the rotation shaft from the frame (10).

13 and 14, a lock nut 16 having a screw formed therein is provided inside the front of the frame 10, and a lock nut 16 and a lock nut 16 are provided on the front of the cover 20 so that the lock bolt 17 is seated. When the cover 20 is closed, the front part is locked with the lock bolt 17, and the rear part is locked with the cover fixing groove 24. The protrusion 18 is in close contact so that the cover 20 can be firmly locked.

In addition, a cover guide jaw 19 protruding to guide the lower edge of the cover 20 is provided on the lower side of the locking protrusion 18 , so that when the cover 20 is opened and closed, the lower side interferes with the frame 10 . It can be seated in the correct position without

The anti-rotation protrusion 15 protruding upward is formed on both sides of the front inner side of the frame 10, and on both sides of the inner front outer periphery of the cover 20, the anti-rotation protrusion 15 is opposite to the concave anti-rotation By forming the seating hole 25, the rotation prevention seating hole 25 of the cover 20 is engaged with the rotation prevention protrusion 15 to prevent the rotation of the cover 10 to prevent friction between the frame 10 and the cover 20. wear can be prevented.

9 and 10, a safety fence 70 is installed on the upper portion of the frame 10 so that an operator can prevent a fall accident in advance when entering and exiting the sewer pipe, and the safety fence 70 is the frame ( 10) The lower side of the safety fence frame 71 is provided with an angle-shaped fence seating hole 71a so as to prevent back and forth movement from the upper side, and the rear side uses the length adjustment clip 73 to open the shaft 32 of the armrest 30. ), and the front side is securely attached to the lock nut 16 provided in the frame 10 using the fence fastening bolt 75 to open and close the door 74 and use it safely. can

In addition, when entering and exiting the sewage pipe, the connection ring 81 provided on the safety ladder 80 is easily fastened vertically to the shaft 32 to secure the entry and exit space as much as possible when entering and exiting the sewage pipe, thereby preventing falling into the opening. can be prevented in

In FIG. 11 , it is also preferable that a mesh-shaped safety net 90 is provided inside the cover seating portion 12 of the frame 10 to ensure safety when the cover 20 is opened.

The present invention is not limited to the specific preferred embodiments described above, and without departing from the gist of the present invention claimed in the claims, anyone with ordinary skill in the art to which the invention pertains can implement various modifications Of course, such modifications are intended to be within the scope of the claims.

10: frame 11: opening seating portion 12: cover seating portion
13: opening/closing fitting 14: hinge fitting 15: anti-rotation protrusion
16: lock nut 17: lock bolt 18: lock protrusion
19: cover guide jaw 20: cover 21: inclined seating part
22: guide rail 23: slide cutout 24: cover fixing groove
25: anti-rotation seating hole 26: guide rail fastening hole 27: bolt seating hole
30: open arms 31: connecting rod 31a: concave inlet
32: shaft 32a: fastening part 33: main arm stand
33a: moving incision 34: moving arm 34a: moving groove
35: guide roller 36: moving arm clamping pin 37: moving arm replacement fastening pin
40: worm gear opening device 41: worm wheel 42: worm gear
43: gear case 44: socket connector 45: foreign matter prevention cap
50: hinge part 51: frame hinge 51a: main pin
52: cover hinge 52a: sub pin 60: portable electric drill
61: electric drill socket 70: safety fence 71: safety fence frame
71a: fence seat 72: fence fastener 73: length adjustment clip
74: door 75: fence fastening bolt
80: safety ladder 81: link
90: safety net 91: safety net fastening bolt

Claims (10)

In a circular manhole cover that is seated in an opening for equipment or people to enter as a sewage pipe buried on one side of a sidewalk or driveway,
A ring-shaped opening seating portion 11 so as to be seated on the outer periphery of the opening, a cover seating portion 12 extending upwardly of the opening seating portion 11 and having a multi-stage engaging protrusion formed therein, and the cover seating a frame 10 having opening/closing mounting holes 13 penetrating both sides of the rear surface of the unit 12 and hinge mounting holes 14 recessed from the upper side to the lower side of the rear surface of the cover mounting unit 12;
a cover 20 that opens and closes an opening at the upper side of the frame 10 and has an inclined seating part 21 formed on an outer periphery so as to be in close contact with the cover seating part 12;
an opening arm 30 seated on the opening and closing fitting 13 of the frame 10 to rotate the cover 20;
a worm gear opening device 40 fastened to one side of the opening and closing fitting 13 and engaged with a gear to rotate the opening arm 30;
One side is seated on the hinge mounting hole 14 of the frame 10; the other side is integrally connected with the cover 20 to open and close the cover 20; characterized in that it consists of a; Round manhole cover with switchgear. The method of claim 1,
A guide rail 22 that is recessed and detached from one side to the other so that the open arm 30 slides back and forth is formed on the inside of the cover 20,
In front of the guide rail 22, slide cutouts 23 cut on both sides are formed to guide while preventing the separation of the open arm 30,
A circular manhole cover equipped with an opening and closing device, characterized in that guide rail fastening holes 26 for attaching and detaching the guide rail 22 with bolts are formed on both sides of the guide rail 22.
3. The method of claim 1 or 2,
The opening arm 30 is seated on both sides of the opening/closing fittings 13 of the frame 10, and a pair of connecting rods 31 with a concave portion 31a formed therein while being engaged with the worm gear opening device 40 and rotating. And, a fastening portion 32a fastened with a bolt to the concave portion 31a of the connecting rod 31 is formed to open and close the cover 20, and one side is connected to the shaft 32 The bar-shaped main arm arm 33 is rotated up and down and the other side is slid back and forth so that the movable cutout 33a is formed, and one side is moved forward and backward along the movable cutout 33a of the main arm member 33. A guide roller (34) having a groove (34a) formed therein, and a guide roller ( 35) is composed of,
The moving arm replacement pin 37 is mutually fastened to the moving cutout 33a of the main arm 33 and the moving groove 34a of the moving arm 34 to connect the cover 20 and the open arm rest 30. And, a circular manhole cover equipped with an opening/closing device, characterized in that it is provided with a moving arm restraint pin (36) for completely opening the cover (20) by limiting the movement of the moving arm stand (34). 4. The method of claim 3,
The worm gear opening device 40 is connected to the connecting rod 31 inside the box-shaped gear case 43 in which the gear is seated on one side of the outer periphery of the frame 10, and the gear is formed on the outer periphery to drive the worm wheel (41) and a circular manhole cover equipped with an opening/closing device, characterized in that the worm gear (42) is provided so as to be vertically installed and rotated by meshing with the gear of the worm wheel (41) at a predetermined reduction ratio. 5. The method of claim 4,
A foreign material prevention cap 45 is provided on the upper portion of the gear case 43 of the worm gear opening device 40 to prevent the inflow of foreign substances, and the foreign material prevention cap 45 has a socket fastened with the worm gear 42 inside the foreign material prevention cap 45 . A circular manhole cover equipped with an opening and closing device, characterized in that a connector (44) is provided, and an electric drill socket (61) connected to a portable electric drill (60) is provided on the upper side of the socket connector (44). The method of claim 1,
The hinge part 50 includes a main pin 51a fastened to the hinge mounting hole 14 of the frame 10, a frame hinge 51 having one side fastened to the main pin 51a, and the frame hinge ( 51) having a pin-shaped sub-pin (52a) fastened to the other side and a cover hinge (52) fastened to the sub-pin (52a) to open the cover 20 by 180 degrees. round manhole cover. The method of claim 1,
A plurality of anti-rotation protrusions 15 protruding to prevent the cover 20 from being rotated when the cover 20 is seated are provided inside the cover seating portion 12 of the frame 10,
The front inner periphery of the cover 20 is equipped with an opening and closing device, characterized in that the anti-rotation protrusion 15 is opposed to the anti-rotation seat 25, which is recessed to prevent the cover 20 from being rotated. round manhole cover. 8. The method of claim 7,
A lock nut 16 having a screw formed therein is provided inside the front of the frame 10 so that a lock bolt 17 is fastened to lock the cover 20 , and the locking nut 16 is provided at the front of the cover 20 . A bolt seating hole 27 is formed opposite to the lock nut 16 to be seated while the bolt 17 is inserted;
A cover fixing groove 24 recessed into the inside of the cover 20 is formed at the rear of the cover 20 to lock the rear portion of the cover 20 , and a cover fixing groove 24 is formed at the rear of the frame 10 . ) is formed with a locking protrusion 18 protruding so as to be in close contact with the locking protrusion 18, and a cover guide jaw 19 protruding to guide it to the correct position when the cover 20 is opened and closed is provided on the lower side of the locking protrusion 18. Circular manhole cover equipped with an opening and closing device. 4. The method of claim 3,
A safety fence 70 is installed on the upper portion of the frame 10 to ensure safety when an operator enters and exits the sewer pipe, and the safety fence 70 is seated on the upper portion of the cover seat 12 of the frame 10 . A safety fence frame 71 having an angle-shaped fence seating hole 71a on the lower side as much as possible, and a length adjustment clip at the rear of the safety fence frame 71 that is adjusted in length to firmly fasten it to the shaft 32 ( 73), and a fence fastener 72 fastened to the lock nut 16 provided in the frame 10 with a fence fastening bolt 75 so as to be seated on the frame 10 from the front of the safety fence frame 71 and , the front of the safety fence frame 71 is composed of a door 74 that opens and closes to enter and exit the sewage pipe,
Inside the safety fence 70, a portable safety ladder 80 installed so as to be held by hand by fastening the connecting ring 81 to the shaft 32 so as to prevent a fall when entering and exiting the sewer pipe. Round manhole cover with device mounted. The method of claim 1,
A circular manhole cover equipped with an opening and closing device, characterized in that a mesh-shaped safety net 90 is provided inside the cover seat 12 of the frame 10 to secure the safety of people entering and leaving the cover 20 when the cover 20 is opened. .

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