KR102263789B1 - A manhole cover with switchgear - Google Patents

Abstract

According to the present invention, a circular manhole cover mounted on an opening part for allowing a person or equipment to enter a sewer pipe buried on one side of a sidewalk or a street comprises: a frame mounted on the opening part; a cover mounted to open and close the opening part from above the frame; an opening device consisting of an opening arm assembly mounted on the frame to be rotated, and a gear device engaged with a gear to be rotated 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 part mounted on the frame to open and close the cover. The manhole cover has the frame formed in multiple stages on the inner circumference of the opening part of the sewer pipe to prevent foreign substances from moving to the inside to safely and easily open and close the cover without difficulty when opening the cover, has the opening arm assembly for opening the cover to partially and fully open the cover, drives the opening device for opening and closing the cover on one side of the outside of the frame by the portable electric drill to easily open and close the cover without additional external power, conveniently mounts a safety fence to prevent accidents, has a bevel gear opening device on one side or both sides depending on the weight of the cover when the cover is manually opened and closed to selectively apply the bevel gear opening device, and prevents rotation of the cover to prevent wear caused by the friction between the cover and the frame.

Description

A manhole cover with switchgear

The present invention relates to a manhole cover equipped with an opening and closing device, and more particularly, a phenomenon in which a cover is provided on a frame formed in multiple stages to prevent foreign substances from entering the inner periphery of an opening of a sewage pipe, and foreign substances are fixed therebetween It is possible to easily open and close the cover by preventing it, and it has an opening arm that opens the cover so that it can be partially opened and fully opened while rotating the cover up and down, and an opening device for opening and closing the cover is provided on the outside of the frame And, it is provided with a socket connector for driving the opening device, so that the cover can be easily opened and closed with a portable electric drill, and it is possible to reduce the abrasion of the cover and the frame by preventing the detachment and rotation of the cover, and the cover of heavy objects is also easy. It relates to a manhole cover equipped with an opening and closing device that can be opened and closed.

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 float 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, and if the sedimentation is prolonged, the sewage flows back and harms the living environment. 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 with a small size of 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 for rapid opening and development of a manhole equipped with a safety device is emerging.

19 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., and the soil and foreign materials are fixed between the cover and the frame, making it difficult to open. 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 thereof, 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 detachability to open the cover; , 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, and when the cover is opened, it has an effect of preventing a fall accident in advance and using it safely.

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 The cover can be opened and closed safely and easily without any obstacles in the opening because foreign matter does not accumulate between them, and it has an opening arm that opens the cover so that it can be partially opened and fully opened while rotating the cover up and down, and the outside of the frame It has an opening device for opening and closing the cover, and a socket connector for driving the opening device so that the cover can be easily opened and closed using a portable electric drill, and the cover and the frame can be easily opened and closed by preventing separation and rotation of the cover. It is to provide a manhole cover equipped with an opening/closing device that can be used while preventing abrasion of the frame and the cover caused by friction, and can easily open and close the cover of a heavy object.

The present invention is a means for achieving the above object, and the manhole cover equipped with the opening and closing device according to the present invention has a circular shape that is seated in an opening for equipment or people to enter and exit into a sewage pipe buried on one side of a sidewalk or driveway. A manhole cover comprising: a frame seated on an outer periphery of the opening; a cover mounted to open and close the opening at the upper side of the frame; an open arm assembly seated inside the frame and rotated, and an opening device interlocking with one side of the open arm assembly to rotate the open arm assembly; a portable electric drill connected to the upper part of the opening device and fastened to open and close the cover; It is seated on the frame and characterized in that it consists of a hinge part for opening and closing the cover.

On the inside of the cover, a guide rail that is recessed and seated from one side to the other so that the open arm is slid back and forth is formed, and a slide incision cut on both sides to prevent the separation of the open arm and guide the guide rail is formed in front of the guide rail. It is characterized in that it is formed.

The open arm is a bar-shaped main arm with one side connected to the shaft and rotated up and down and the other side is formed with a step so that the other side is fastened with a bolt, and a step is formed so that one side is fastened with the main arm with a bolt, and the other side is recessed. It is characterized in that it consists of an arm and a guide roller that is seated in the concave portion of the separation arm and is connected with a pin so as to move back and forth along the slide cutout of the guide rail.

The gear device of the opening device is provided with a worm wheel that is connected to the shaft at one side of the outer periphery of the frame and has a gear formed on the outer periphery, and a worm gear that is vertically engaged with the gear of the worm wheel at a predetermined reduction ratio to rotate and is provided with a socket on the upper side. It is characterized in that the connector is connected and driven.

The socket connector is connected to an electric drill socket of a portable electric drill to rotate the worm gear.

A lock nut having a screw formed therein is provided at the front inner side of the frame to seat the lock bolt to lock the cover, and a bolt seating hole is drilled opposite the lock nut to seat the lock bolt on the front upper side of the cover. It is characterized in that it is formed.

Anti-rotation protrusions protruding to prevent the cover from rotating when the cover is seated are provided on both sides of the front inner side of the frame, and the anti-rotation protrusions are seated on both sides of the front inner outer periphery of the cover to prevent the cover from rotating It is characterized in that the anti-rotation seat is formed opposite to the anti-rotation protrusion so as to be concave.

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

First, a cover is provided on the frame formed in multiple stages on the inner periphery of the opening of the sewage pipe to prevent foreign substances from entering the inside, so that foreign substances do not accumulate between the cover and the frame. can be opened and closed.

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 fully open the cover.

Third, by providing an opening device for opening and closing the cover on the outside of the frame, and a socket connector to drive the opening device, the opening device can be driven with a portable electric drill to easily open and close the cover as well as portable electric By using a 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 cover from being detached by fastening the bolt, and a rotation preventing protrusion protruding inside the frame is formed to prevent the cover from rotating due to friction between the cover and the frame. It can be used to prevent wear and tear.

Fifth, by providing an opening device on both sides of the frame, it is possible to easily open and close the cover of the heavy object.

Sixth, 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.

Seventh, by installing a safety fence 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.

Eighth, there is an effect that a worker can safely enter and exit the sewer pipe by simply installing a safety ladder on the inside of the frame and the safety fence.

1 is a schematic view of a manhole cover equipped with an opening and closing device according to the present invention is installed.
Figure 2 is a schematic view of a manhole cover equipped with a switchgear according to the present invention.
3 is a state diagram showing a frame according to the present invention.
Figure 4 is a state diagram of a state of opening and closing the manhole cover with an electric drill according to the present invention.
5 is a state diagram of a state of opening and closing the manhole cover with an open handle according to the present invention.
Figure 6 is a state diagram showing the complete opening of the manhole cover according to the present invention.
Figure 7 is a state diagram of a fully opened manhole cover equipped with an open handle according to the present invention.
Figure 8 is a schematic view showing the safety fence mounting of the manhole cover according to the present invention.
Figure 9 is a schematic diagram showing the component configuration of the open arm according to the present invention.
Figure 10 is a schematic view of the safety fence and ladder mounting of the manhole cover according to the present invention.
11 is a state diagram showing two driving devices on the manhole cover according to the present invention.
12 is a schematic view showing a bevel gear device according to the present invention.
13 is a schematic view showing the worm gear device according to the present invention.
14 is a cross-sectional view of a cover and frame according to the present invention;
15 is a cross-sectional view showing a partial opening according to the present invention.
16 is a state diagram showing an operating state of the hinge unit according to the present invention.
17 is a state diagram showing a mounting state of the hinge unit according to the present invention.
18 is a state diagram showing the coupling state of the cover and the hinge portion according to the present invention.
19 is a state diagram showing the assembly shape of the existing circular manhole cover.
Figure 20 is a schematic diagram showing the patented safety manhole cover of the present application.

Hereinafter, a preferred embodiment of a 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 4, the 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 is a circular manhole cover that is seated in an opening for equipment or people to enter and exit. , a frame 10 seated on the outer periphery of the opening, a cover 20 that opens and closes the opening from the upper side of the frame 10, and an open arm that opens and closes the cover 20 in an interlocking manner (30) and an opening device 40 for opening and closing the cover 20, and a hinge portion 80 for completely opening the cover 20.

In FIG. 3, the frame 10 includes an opening seating part 11 formed in a ring shape to be seated on the outer periphery of the opening, and a cover seating extending upward of the opening seating part 11 and having a multi-stage locking protrusion on the inside. The part 12, the opening/closing fittings 13 provided to penetrate through both sides of the rear surface of the cover seat 12, and the hinge fittings 14 cut from the upper side to the lower side of the rear surface of the cover seat 12) is formed

In addition, the inside of the frame 10 is inclined inward so that the cover 20 is seated so that the inclined surface 10b is formed to facilitate opening and closing of the cover 20, and the cover 20 is inside the inclined surface 10b. is seated and a multi-stage step 10a is formed to block the inflow of foreign substances therebetween, and a packing 10c is provided on the upper portion of the step 10a so that the frame 10 and the cover 20 are sealed.

The cover 20 is seated while being in close contact with the cover seating part 12 to open and close the opening at the upper side of the frame 10, and inside the cover 20, one side so that the open arm 30 slides back and forth. The guide rail 22 is recessed to the other side and seated in the guide rail 22 is formed, and the slide cutout 23 cut on both sides to prevent the separation of the open arm 30 and guide the guide rail 22 is formed in front of the guide rail 22. It is formed so that the guide rollers 34 of the open arms 30 are fastened to the link slide cutout 23 .

4 and 9, the opening arm 30 is engaged with one side of the opening device 40 and rotated to open and close the cover 20, and one side of the shaft 31 and The bar-shaped main arm stand 32 is connected, rotated up and down, and the other side is fastened with a fastening bolt 35, and one side is formed with a step so that one side is fastened with the main arm stand 32 with a bolt, and the other side is recessed. It consists of a separation arm 33 and a guide roller 34 seated in the concave portion of the separation arm 33 and connected with a pin to move back and forth along the slide cutout 22 of the cover 20 .

4 and 13, the opening device 40 is seated on one side of the opening/closing fitting 13 of the frame 10 and connected to one side of the shaft 31 of the opening arm 30, the shaft ( 31) is composed of a gear device that is rotated by being meshed with a gear to rotate.

That is, the opening device 40 is connected to the shaft 31 inside the gear case 44 on which the gear is seated on one side of the outer periphery of the frame 10 and the worm wheel 41 having a gear formed on the outer periphery; It is composed of 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 43 is provided at an upper portion of the worm gear 42 .

In addition, a foreign material prevention cap 45 is provided on the upper portion of the gear case 44 to prevent foreign matter from entering, and a socket connector 43 connected to the worm gear 42 inside the foreign material prevention cap 45 is provided. An electric drill socket 72 is provided so that the portable electric drill 70 is connected to the .

7 and 12 show the opening device 40, a bevel gear opening device 50 is provided, and the bevel gear opening device 50 is a gear case in which a gear is seated on one side of the outer periphery of the frame 10 ( 54), a driving gear 51 connected to the shaft 31, a driven gear 53 driven by meshing with the driving gear 51 in a vertical direction at a predetermined gear ratio, and the driving gear 51 It consists of a socket connector 52 to be seated on the upper side, and an opening handle 60 that is fastened with the socket connector 52 and rotates by hand holding the socket 62 is seated on the upper portion of the bevel gear opening device 50. It is connected to and is formed to open the cover 20 by manual operation.

In addition, a foreign material prevention cap 55 is provided on the upper portion of the gear case 54 to prevent foreign material from entering.

11 is an example of using two bevel gear opening devices 50, and it is also preferable that the manhole cover of a heavy object is formed to open and close easily when opening.

16 to 17 , the hinge part 80 is mounted on the hinge frame 81 so that the hinge frame 81 is seated on the hinge mounting hole 14 of the frame 10 to open and close the cover 20 . A frame hinge 82 provided with a frame hinge long hole 83a is fastened to allow movement, and a cover hinge 83 provided with a long cover hinge hole 83a on the upper side of the frame hinge 82 is a hinge connecting pin. When the cover 20 is opened, the frame hinge 82 is constrained to be movable only by a certain distance by the hinge separation prevention bolt 18 when the cover 20 is opened, and is fastened together with the cover 84 to prevent the cover 20 from being separated. The escape prevention bolt 19 is provided so that the cover 20 is constrained while moving only by a certain distance so that the cover 20 can be opened 180 degrees without external protrusion of the rotation shaft.

14 to 15, 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 25 is formed opposite to the lock nut 16 so that the lock bolt 17 is seated, and a cover fixing groove 24 is provided at the rear of the cover 20 ), the protrusion of the hinge separation prevention bolt 18 is inserted into the cover fixing groove 24, and the lock bolt 17 is securely fastened to the lock nut 16 of the frame 10 to secure the cover 20. It is formed to be firmly fixed.

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 so as to prevent the cover 20 from being rotated, and the anti-rotation seat 21 is formed opposite to the anti-rotation protrusion 15 to prevent the rotation of the cover 20 and the frame 10. It is formed to prevent friction and thereby prevent wear.

In FIG. 10, a safety fence 90 is installed on the upper portion of the frame 10 to ensure the safety of the worker when the worker enters and exits the sewer pipe, and the safety fence 90 is the cover seat portion of the frame 10 ( 12) is provided with an angle-shaped fence seat hole (91a) so that left and right movement is restricted on the upper part, and a length adjustment clip 93 whose length is adjusted is attached to the rear of the shaft 31 of the open armpit 30. ), and the front is firmly fastened to the lock nut 16 provided in the frame 10 with the fence fastening bolt 95 to the fence fastening hole 92 that is seated on the frame 10, so that the operator's It is formed to ensure safety when entering and exiting the sewer pipe.

In addition, it is also preferable that a portable safety ladder 100 used by fastening the connecting ring 100a to the shaft 31 to prevent a worker from falling when entering and exiting the sewage pipe is installed inside the safety fence 90 .

The operation of the 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 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 is a circular manhole cover that is seated in an opening for equipment or people to enter and exit. , 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 is 30 ) is seated to open and close the cover 20, and an opening device 40 is provided to open and close the cover 20 so that the cover can be conveniently opened and closed with a portable electric drill 70, and the frame 10 ) and a hinge portion 80 for hinge-connecting the cover 20 is provided to completely open the cover 180 degrees.

That is, 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 seat the cover in the shape of a multi-stage clasp on the inside. The part 12 is formed and a plurality of packings 10c are seated therein to open and close the cover 20 while closely adhering to it, and the opening/closing fittings 13 penetrating both sides of the rear surface of the cover seating part 12. is formed and the opening device 40 is connected, and a hinge mounting hole 14 cut from the upper side to the lower side of the rear surface of the cover receiving unit 12 is formed to seat the hinge unit 80 .

In addition, an inclined surface 10b inclined inwardly so that the cover 20 is seated is formed on the inside of the frame 10 so that the cover 20 can be opened and closed very easily up and down, and the inner side of the inclined surface 10b A multi-stage step 10a is formed on the upper portion of the step 10a, and the cover 20 is seated, preventing foreign substances from entering between the cover and the frame in advance, thereby making it easy to open and close the cover, and the upper portion of the step 10a has a frame ( Packing 10c is provided so that 10) and the cover 20 are sealed, so that bad odors leaking out from the inlet pipe can be prevented in advance.

And, the cover 20 is seated in close contact with the cover seating portion 12 to open and close the opening at the upper side of the frame 10 .

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 34 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.

The gear device of the opening device 40 is connected to the shaft 31 from one side of the outer periphery of the frame 10 in FIGS. 4 and 13 and a worm wheel 41 having a gear formed on the outer periphery is seated, and the worm wheel ( The worm gear 42 is embedded in the gear case 44 so as to be vertically installed and rotated by meshing with the gear of 41) at a predetermined reduction ratio, and a socket connector 43 is connected to the upper side of the worm gear 42 to connect a portable electric drill ( 70), it is possible to open and close the cover very conveniently without a mechanism even with a small force in connection with the electric drill socket 72 provided in the device.

As a method of manually opening and closing the cover 20 using a bevel gear opening device 50 that is another example of the opening device 40 in FIGS. 5 and 12 , the frame 10 is located at one side of the outer periphery. The drive gear 51 having a conical gear connected to the shaft 31 is driven, and the conical driven gear 53 is engaged with the drive gear 51 and rotated in a vertical gear ratio with a constant gear ratio, The socket 62 fastened to the socket connector 52 connected to the upper side of the driving gear 51 has an open handle 60 and a connection arm arm 61 fastened thereto, and rotates it to manually remove the cover 20. It can be easily opened and closed.

As Fig. 11 shows another example of the opening device 40, the shaft 31 seated in the opening/closing fitting 13 of the frame 10 is rotated and the opening arm essay 30 is driven, and the A pair of bevel gear opening devices 50, which are interlocked with one side of the shaft 31 and rotate while being engaged with a gear, are installed on both sides and rotate while transmitting power to the shaft 31 from both sides to easily open and close the cover of the heavy object. do.

In FIG. 9, the open arm assembly 30 is connected to the shaft 31 on one side to rotate up and down and the other side to be fastened with a bolt to a bar-shaped main arm stand 32 having a step is fastened, and one side is the A step is formed so as to be fastened with the main arm stand 32 and the fastening bolt 35, and the separating arm arm 33 with the other side recessed is connected, and it is seated on the recessed part of the separation arm arm 33, and the slide cutout 23. A guide roller 34 connected with a pin is connected to move forward and backward along the . The cover 20 is opened and closed while moving along the slide cutout 23 .

In FIGS. 6 and 7 , when the cover is completely opened, in the partially opened state, the fastening bolt 35 coupling the main arm 32 and the separation arm 33 is separated to form the separation arm 33 . When the restraint is released, the cover 20 is separated and can be completely opened.

16 to 18, the hinge part 80 has a hinge frame 81 seated on the hinge mounting hole 14 of the frame 10, and a frame hinge long hole 82a is formed on the hinge frame 81. The frame hinge 82 is fastened together with the hinge separation prevention bolt 18, and the cover hinge 83 provided with the cover hinge long hole 83a on the frame hinge 82 is rotated together with the hinge connecting pin 84. It is fastened so as to be fastened to the cover hinge long hole (83a) and fastened to the cover 20 by penetrating the cover release prevention bolt 19, so that when the cover 20 is opened, the frame hinge 81 moves up and down with a distance limit and The cover 20 can be fully opened 180 degrees without protrusion of the rotation shaft while moving forward with a distance limit.

14 and 15, a lock nut 16 having a screw formed therein is provided inside the front of the frame 10, and a lock nut 16 is provided at the front and outside of the cover 20 so that the lock bolt 17 is seated. ) and a perforated bolt seating hole 25 is formed, and a cover fixing groove 24 is formed at the rear. When the cover 20 is closed, the front part is a lock bolt 17 and the rear part is the cover fixing groove 24. The protrusion of the hinge separation prevention bolt 18 is inserted into the cover 20 to completely lock the cover 20 .

The anti-rotation protrusion 15 protruding inwardly 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 and concave. By forming the seating hole 21, the rotation prevention seating hole 21 of the cover 20 is engaged with the rotation prevention protrusion 15 to prevent the rotation of the cover 20 to prevent friction between the frame 10 and the cover 20. wear can be prevented.

8 and 10, a safety fence 90 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 90 is the frame ( 10) The lower side of the safety fence frame 91 is provided with an angle-shaped fence seating hole 91a so as to prevent back and forth movement from the upper side, and the rear side is the shaft 31 of the open arm using a length adjustment clip 93. ), and the front side is securely mounted on the lock nut 16 provided in the frame 10 using the fence fastening bolt 95 at the fence fastening hole 92 to open and close the door 94 for safe use. When entering and exiting the sewage pipe, the connection ring 100a provided in the safety ladder 100 is easily fastened to the shaft 31 to prevent falling into the opening when entering and exiting the sewage pipe in advance.

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 10a: Step 10b: Inclined surface 10c: Packing
11: opening seating part 12: cover seating part 13: opening and closing fittings
14: hinge mounting hole 15: anti-rotation protrusion 16: lock nut
17: lock bolt 18: hinge separation prevention bolt 19: cover separation prevention bolt
20: cover 21: anti-rotation seat 22: guide rail
23: slide cutout 24: cover fixing groove 25: bolt seating hole
30: open arm assembly 31: shaft 32: main arm stand
33: separation arm 34: guide roller 35: fastening bolt
40: opening device 41: worm wheel 42: worm gear
43: socket connector 44: gear case 45: foreign object prevention cap
50: bevel gear opening device 51: driving gear 52: socket connector
53: driven gear 54: bevel gear case 55: foreign matter prevention cap
60: open handle 61: connecting arm 62: socket
70: portable electric drill 71: drill body 72: electric drill socket
80: hinge part 81: hinge frame 82: frame hinge
82a: frame hinge long hole 83: cover hinge 83a: cover hinge long hole
84: hinge connection pin
90: safety fence 91: safety fence frame 91a: fence seat
92: fence fastener 93: length adjustment clip 94: door
95: fence fastening bolt 100: safety ladder 100a: linkage

Claims (11)

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 locking protrusion formed therein, and the cover seating a frame 10 having opening/closing mounting holes 13 penetrating through both sides of the rear surface of the unit 12 and hinge mounting holes 14 cut from the upper side of the rear surface of the cover receiving unit 12 to the lower side;
a cover 20 that is seated in close contact with the cover seating part 12 so as to open and close the opening at the upper side of the frame 10;
an opening arm 30 seated on the opening and closing fitting 13 of the frame 10 to rotate the cover 20;
an opening device 40 coupled to one side of the opening/closing fitting 13 and engaged with a gear to rotate the opening arm 30;
A manhole cover with an opening and closing device, characterized in that it is seated on the hinge mounting hole (14) of the frame (10) and consists of a hinge part (80) for opening and closing the cover (20). The method of claim 1,
The inside of the frame 10 is inclined inward so that the cover 20 is seated to form an inclined surface 10b so that the cover 20 can be opened and closed, and the cover 20 is seated on the inside of the inclined surface 10b. A multi-stage step (10a) is formed to block the inflow of foreign substances therebetween, and a packing (10c) is provided between the step (10a) to seal the frame (10) and the cover (20). Manhole cover with switchgear.
3. The method of claim 1 or 2,
A guide rail 22 is formed inside the cover 20, which is recessed from one side to the other side so that the open arm 30 is slid back and forth, and is seated, and the open arm is at the front of the guide rail 22. ) A manhole cover equipped with an opening and closing device, characterized in that slide cutouts 23 cut on both sides are formed to guide while preventing the departure.
The method of claim 1,
The opening arm 30 is coupled to one side of the opening device 40 and rotated to open and close the cover 20, and one side is connected to the shaft 31 and rotates up and down and the other side A bar-shaped main arm rest 32 having a step formed so as to be fastened with the fastening bolt 35, and a separation arm bar 33 having a step formed so that one side is fastened with the main arm stand 32 with a bolt and the other side is recessed; Manhole equipped with an opening/closing device, characterized in that it is seated in the concave portion of the separation arm (33) and is composed of a guide roller (34) connected with a pin so as to move back and forth along the slide cutout (22) of the cover (20). cover.
5. The method of claim 4,
The opening device 40 is connected to the shaft 31 inside the box-shaped gear case 44 on which the gear is seated on one side of the outer periphery of the frame 10, and a worm wheel 41 driven with a gear formed on the outer periphery ), and a 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.
6. The method of claim 5,
An upper portion of the gear case 44 of the opening device 40 is provided with a foreign material prevention cap 45 for preventing the inflow of foreign substances, and a socket connector connected to the worm gear 42 inside the foreign material prevention cap 45 is provided. (43) is provided, the upper side of the socket connector (43) is a manhole cover equipped with an opening and closing device, characterized in that the electric drill socket (72) is provided so that the portable electric drill (70) is connected.
5. The method of claim 4,
The opening device 40 includes a driven gear 53 connected to the shaft 31 and driven inside a gear case 54 on which the gear is seated on one side of the outer periphery of the frame 10 , and the driven gear 53 . ) and a bevel gear opening device 50 comprising a drive gear 51 driven by meshing with a predetermined gear ratio in the vertical direction, and a socket connector 52 seated on the upper side of the drive gear 51,
On the upper portion of the bevel gear opening device 50, an opening handle 60 that is fastened with the socket connector 52 and rotates while holding by hand, a rod-shaped connecting arm 61 held by hand, and the connecting arm rest 61 A manhole cover equipped with an opening and closing device, characterized in that the socket 62 for fastening with is connected.
8. The method of claim 7,
On the other side of the bevel gear opening device 50, a second bevel gear device 50 and an opening handle 60 are provided to double open and close the cover 20 of the heavy object from both sides. Installed manhole cover.
The method of claim 1,
A lock nut 16 having a screw formed therein is provided on the inside of the front of the frame 10 so that a lock bolt 17 is seated to lock the cover 20,
A manhole cover equipped with an opening/closing device, characterized in that a bolt seating hole (25) perforated opposite to the lock nut (16) is formed in the front inner side of the cover (20) so that the lock bolt (17) is inserted and seated. The method of claim 1,
Anti-rotation protrusions 15 are provided on both sides of the front inner side of the frame 10 to prevent the cover 20 from rotating when seated,
The anti-rotation protrusion 15 is seated on both sides of the front inner periphery of the cover 20 to prevent the cover 20 from rotating, and the anti-rotation seat 21 is recessed opposite the anti-rotation protrusion 15. Manhole cover equipped with an opening and closing device, characterized in that formed. 5. The method of claim 4,
A safety fence 90 in the shape of a blocking bar is installed on the upper portion of the frame 10 to control entry and exit so that safety is ensured when an operator enters and exits the sewer pipe,
Inside the safety fence 90, a portable safety ladder 100 installed so as to be held by hand by fastening the connecting ring 100a to the shaft 31 so as to prevent a fall when entering and exiting the sewage pipe. Manhole cover with device mounted on it.

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