KR102297109B1 - A Square manhole cover with portable switchgear open and close - Google Patents

Abstract

The present invention relates to a quadrangular manhole cover, which is seated in an opening portion for equipment or a person to enter or exit a sewage pipe buried in one side of a sidewalk or driveway. The quadrangular manhole cover comprises: a cover for opening and closing an opening portion; a frame which has a multi-stage seating protrusion formed thereon so that the same is seated on the inner periphery of the opening portion, and on an inner side of which the cover is seated; an open arm assembly provided inside both sides of the frame to open and close the cover in a link manner; a power transmission box seated on one outer side of the frame; a portable switchgear inserted into the power transmission box to open and close the cover; a hinge portion seated on a hinge seating portion formed on the rear surface of the frame to open and close the cover; and a safety net which is provided on the frame seated on a lower end of the seating protrusion of the frame and to which a plurality of bars are connected to prevent a person from falling through the opening portion when the cover is opened. The multi-stage cover and frame can be provided on the inner periphery of the opening portion of a sewage pipe so that the cover can be easily opened and closed. The open arm assembly using a link connection method can be provided so that the cover can be safely and easily opened and closed. The portable switchgear for opening and closing the cover can be provided so that the cover can be easily opened and closed with a portable electric drill with less power. A two-stage hinge can be provided so that the cover can be opened 180 degrees from the frame without protrusion of a rotating shaft, and a person can be prevented from falling into the sewage pipe.

Description

A square manhole cover with portable switchgear open and close}

The present invention relates to a rectangular manhole cover that can be opened and closed by a portable opening and closing device, and more particularly, by providing a cover on a multi-stage frame on the inner periphery of an opening of a sewage pipe, it can be easily opened and closed, and a link-shaped opening arm is provided. The cover can be opened and closed safely and easily, and a power transmission box and a portable opening and closing device are provided so that the cover can be easily opened and closed while moving using a portable electric drill. It relates to a rectangular manhole cover that can be opened and closed at 180 degrees conveniently without protrusion and opened and closed with a portable opening and closing device that can prevent a person from falling into a sewer pipe in advance.

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 large manholes, 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 the large manhole being installed in a citizen park built around a covered road or river. The need for the development of

16 is a schematic view showing a conventional manhole cover, the cover 2 is seated on the cover frame 1 on the upper part of the manhole formed in the sewage pipe, and the safety net 3 is provided to prevent a safety accident when the cover 2 is opened. It is seated on the inside of the cover frame (1).

However, in the conventional manhole cover, the gap between the cover and the cover frame is formed widely, so that foreign substances are introduced and the foreign material is compacted by the movement of vehicles, etc. When it is necessary to open the cover installed in the space, it is difficult for heavy equipment to enter and exit, so it is difficult to open and separate the cover, which incurs a lot of incidental costs for the maintenance and repair work of the sewer pipe. As a result, the traffic flow was greatly disturbed, and the surrounding of the manhole cover and the cover frame were damaged due to the use of heavy equipment, and frequent repairs were required.

In order to improve the above problems, the applicant of the present invention has released and registered a patent for a multifunctional safety manhole cover, the multifunctional manhole cover, as shown in FIG. A frame, a cover that opens and closes the opening, and is seated on the cover frame, a hinge pin moving device having a rotational opening and locking function and detachable function to open the cover, a cover frame that can be opened without the aid of heavy equipment; It is composed of a detachable inspection port to inspect 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 in the cover frame, and when the cover of heavy objects is opened and closed, it is protected from physical impact It can prevent damage in advance, prevent foreign substances from entering the gap between the cover and the cover frame, and can check the sewage pipe very easily without opening the cover. It has the effect of being able to open the cover conveniently without a hinge, and it can be used safely by preventing a fall accident when the cover is opened.

However, the prior art has a problem in that it takes time to prepare and install the tool because the cover must be opened and closed using a tool,

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 frame in which multi-stage engaging ends are formed on the inner periphery of an opening of a sewage pipe, so that foreign substances do not accumulate between the cover and the frame, so that heavy equipment It is possible to open and close the cover easily without using an open arm, and it has a link-shaped opening arm that rotates the cover, so that the cover can be opened and closed safely and easily by interlocking the arm when the cover is opened and closed, and the power transmission box is located on one side of the frame. and a portable opening/closing device that is inserted inside and driven so that the cover can be easily opened and closed using a portable electric drill. A rectangular manhole that can be safely opened 180 degrees by providing a hinge part of the stage, a safety net inside the frame, and a safety fence on the outside to provide a cover.

The present invention is a means for achieving the above object, and the rectangular manhole cover that opens and closes with a portable opening and closing device according to the present invention is seated in an opening for inflow or outflow of equipment into a sewage pipe buried on one side of a sidewalk or driveway or for a person to enter. A rectangular manhole cover comprising: a cover for opening and closing the opening; a frame having a multi-stage seating jaw formed therein to be seated on the inner periphery of the opening, and on which the cover is seated; an open arm that opens and closes the cover in a link interlocking manner from the inside of the frame; a power transmission box seated on an outer side of the frame, and a portable opening/closing device inserted into the power transmission box to open and close the cover; a hinge portion seated on the rear surface of the frame to open and close the cover; It is seated on the frame that is seated at the lower end of the frame and is characterized in that it is composed of a safety net connected to a plurality of bars to prevent falling into the opening when the cover is opened.

A guide rail seated from one side to the other side is provided on the inside of the cover so that the open arm is slid back and forth, and the guide rail has slide cutouts cut on both sides to prevent the separation of the open arm and to guide it. It is characterized in that a guide rail fastening portion for fastening the guide rail is provided.

The opening arm has a boom-shaped shaft that is fastened with one side of the portable opening and closing device and rotates to open and close the cover, and a power transmission unit is fastened to one side of the shaft, one side is connected to the shaft, and the other side is concave to rotate. A main arm, one side of the main arm is fastened with the concave part of the main arm, and the other side rotates up and down while moving forward and backward, and the other side is concave. characterized in that it is composed of

The portable opening/closing device includes a gear case formed in a box shape to be inserted and seated in a power transmission box, a worm gear that is vertically installed and rotated with a socket connector fastened to an upper side of the gear case to be connected to a portable electric drill, and the worm gear and A worm wheel that is rotated in engagement with a predetermined reduction ratio and provided with a rotation shaft inside, an upper chain gear coupled to one side of the rotation shaft of the worm wheel and driven, and a lower chain gear connected to the upper chain gear by a chain and rotated in engagement with a predetermined reduction ratio and a power take-off formed so as to be recessed from the lower side to the upper side at the center of the lower chain gear and to be seated while being inserted from the upper side into the connecting protrusion of the power transmission unit is fastened and configured.

A safety net fastening nut having a screw formed therein is provided on the inside of the front side of the frame so that a lock bolt is seated to lock the safety net device from the front, and a cylindrical shaft is provided on both sides of the rear side of the frame so that the shaft of the open arm is seated. A seating hole is provided, and a safety net fastening ring provided at the rear of the safety net is seated on the shaft.

The rectangular manhole cover that opens and closes with a portable 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 in which multiple locking ends are formed on the inner periphery of the opening of the sewage pipe to prevent foreign substances from entering the inside. As well as being able to safely seat the cover to the frame.

Second, it is possible to safely and easily open and close the cover in a link interlocking manner while moving the cover up and down by providing a link-shaped opening arm that rotates the cover on the inside of the cover and the frame.

Third, a power transmission box is provided on one side of the frame, and a portable opening and closing device inserted therein is connected so that the cover can be easily opened and closed with a small force according to the reduction ratio with a portable electric drill, and has a portable opening and closing device While moving, the manhole covers installed in multiple numbers can be opened without additional equipment.

Fourth, by having a hinge part for opening the cover 180 degrees at the rear of the cover and the frame, it is possible to open and separate the cover from the frame, as well as safely open the cover 180 degrees without protrusion of the rotation shaft, so that it can be used conveniently.

Fifth, it is possible to easily lock and release the cover by providing a locking device and a locking protrusion to lock and release the cover forward and backward.

Seventh, a safety net is provided inside the frame, and a safety fence is installed on the outside to prevent an accident in which a person falls into a sewer pipe in advance.

1 is a rectangular manhole cover that opens and closes with a portable opening and closing device according to the present invention;
schematic
Figure 2 is a state diagram in which the opening and closing device of the manhole cover according to the present invention is installed.
Figure 3 is a state diagram showing a partially opened state of the manhole cover according to the present invention.
Figure 4 is a state diagram showing a fully opened state of the manhole cover according to the present invention.
Figure 5 is a state diagram showing the cover of the manhole cover according to the present invention.
Figure 6 is a state diagram showing the frame of the manhole cover according to the present invention.
Figure 7 is a single view of the frame and safety net of the manhole cover according to the present invention.
8 is a state diagram showing a guide rail according to the present invention.
Figure 9 is a state diagram showing the open arm of the manhole cover according to the present invention.
Figure 10 is a state diagram showing the outline of the power transmission of the portable opening and closing device of the manhole cover according to the present invention.
11 is a schematic view showing the fastening state of the portable opening and closing device of the manhole cover according to the present invention.
Figure 12 is a three-dimensional view showing the portable opening and closing device of the manhole cover according to the present invention.
13 is a state diagram showing the fastening state of the portable opening and closing device of the manhole cover and the power transmission box according to the present invention.
Figure 14 is a state diagram showing the hinge portion of the manhole cover according to the present invention.
15 is a state diagram in which a safety fence and a ladder are installed on the manhole cover according to the present invention.
16 is a schematic view showing an existing manhole cover.
17 is a schematic diagram showing a safety manhole cover for which the present applicant has registered a patent.

Hereinafter, preferred embodiments 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 rectangular manhole cover opened and closed by the portable opening and closing device according to the present invention is a manhole seated in an opening for entering or leaving equipment into a sewage pipe buried on one side of a sidewalk or roadway, etc. As a cover, a cover 10 for opening and closing the opening, a frame 20 on which the cover 10 is seated, and an opening arm 40 for opening and closing the cover 10 in a link interlocking manner; A power transmission box 50 having a space formed on the inside from one external side of the frame 20, a box cover 51 provided on the upper side, and a positioning pin 52 provided on the lower side, and the power transmission box 50 ), a portable opening/closing device 60 that opens and closes the cover 20 while carrying it, a hinge 70 that opens and closes the cover 10, and prevents falling into the opening when the cover 10 is opened It is composed of a safety net (80).

That is, the cover 10 is equipped with a box-shaped cover frame 11 seated on a plurality of horizontal and vertical bars to open and close the opening in FIG. The sphere 12 and the hinge seating portions 13 cut out on both sides of the rear surface of the cover frame 11 are formed.

In addition, the guide rail 30 seated from the front to the rear is seated on the inside of the cover 10 so that the open arm 40 slides back and forth, and the open arm rest 40 is mounted on the guide rail 30 . ) is formed with slide cutouts 31 cut on both sides to guide while preventing separation, and guide rail fastening parts 32 for attaching and detaching the guide rail 30 with bolts to the inside of the cover 20 are formed. .

4 and 6, the frame 20 is formed with a multi-stage seating jaw 21 so that the cover 10 and the safety net 80 are seated on the inner periphery of the opening, and the cover 10 is moved from the front. A plurality of locking rod inserts 27 for locking and releasing are provided.

In FIGS. 3 and 9 , the open arm 40 is seated on the shaft fasteners 23 perforated on both sides of the rear surface of the frame 20 and rotated with the shaft 41, and on the inside of the shaft 41 . A bar-shaped main arm rest 42 in which a moving cutout 42a is formed so that it is fastened and rotates up and down and the other side slides back and forth, and one side rotates up and down along the moving cutout 42a of the main arm 42 and back and forth A moving arm rest 43 having a moving groove 43a to be moved, and a pin to be seated in a concave portion formed on the other side of the moving arm 43 to move along the slide cutout 31 of the guide rail 30. It is composed of a guide roller 44 that is connected.

In addition, an arm replacement pin 46 for mutually fastening the moving cutout 42a of the main arm 42 and the moving groove 43a of the moving arm rest 43, and an arm restricting the movement of the moving arm rest 44 A high-speed pin 47 is provided, and at one end of the shaft 41 there is a connection protrusion 45a protruding vertically from one side to be fastened with the portable opening and closing device 60 from the inside of the power transmission box 50. The formed power transmission unit 45 is provided.

11, 12 and 13, the portable opening/closing device 60 includes a gear case 61 formed in a box shape to be inserted into and seated in the power transmission box 50, and the gear case 61. A worm gear 62 that is vertically installed and rotated by a socket connector 64 is fastened to be connected to the portable electric drill 100 on the upper side, and the worm gear 62 is engaged with the worm gear 62 at a predetermined reduction ratio and rotates, and a rotating shaft is provided inside The worm wheel 63, the upper chain gear 65 driven by being fastened to one side of the rotation shaft of the worm wheel 63, and the upper chain gear 65 and the lower chain connected to the chain 66 are engaged and rotated at a predetermined reduction ratio. The chain gear 65a and the power take-off recessed portion connected to the central portion of the lower chain gear 65a and recessed so as to be seated downwardly while being inserted from the upper side into the connection protrusion 45a of the power transmission unit 45 at one end. It is composed of a power take-off port 67 in which (67a) is formed.

In FIG. 14 , the hinge part 70 is seated on the hinge seating part 13 formed on the rear surface of the cover frame 11 to open and close the cover 10 , and is seated on both rear sides of the frame 20 back and forth The hinge frame 71 in which the frame long hole 71a is formed to slide, and the main pin 72 are connected so as to move back and forth along the frame long hole 71a of the hinge frame 71 and are connected to the main pin 72 A frame hinge 73 rotated up and down and formed with a frame hinge hole 73a, a sub pin 74 connected to the frame hinge hole 73a of the frame hinge 73, and the sub pin 73a and The connected cover hinge 75 is fastened to the hinge mounting hole 13 of the cover 10, and a hinge portion 70 for sequentially partially opening the cover 10 and completely opening the cover 10 by 180 degrees is provided.

7, the safety net 80 is seated at the lower end of the frame 20, a plurality of bars are connected to prevent falling into the opening when the cover 10 is opened, and a plurality of attaching and detaching the safety net 80 to the frame A safety net fastening ring 81 is formed.

A locking protrusion 14 protruding to lock the rear portion of the cover 10 is provided at the rear of the cover 10, and the locking protrusion 14 is recessed so that the locking protrusion 14 is in close contact with the rear of the frame 20. The mouth portion 25 is formed, and it is also preferable that a cap-shaped foreign material prevention hole 28 is formed on the outside of the locking concave inlet portion 25 to prevent the inflow of foreign substances.

In FIG. 11, a plurality of fence mounting holes 24 indented by screws are formed outside the edge of the frame 20, and a safety fence 90 is provided at the top of the fence mounting hole 24 of the frame 20. is installed

In addition, the inside of the frame 20 is mounted on the handle mounting port 26 of the frame 20 to prevent falling when entering and exiting the sewer pipe to prevent a fall accident when entering and exiting the sewage pipe 110 is installed. .

In FIG. 13 , a plurality of protruding positioning pins 52 to which the portable opening and closing device 60 is closely adhered are seated at the lower end of the power transmission box 50 , and the positioning pin 52 is seated at the lower end of the portable opening and closing device 60 . A positioning recess 68 that is seated while being inserted into the pin 52 is provided so that the portable opening/closing device 60 is aligned in the correct position, and the rotational force is accurately transmitted to the open arm assay 40 .

The operation of the rectangular manhole cover for opening and closing with the portable opening and closing device according to the present invention having the configuration as described above is as follows.

As shown in FIGS. 1 to 4, the rectangular manhole cover opened and closed by the portable opening and closing device according to the present invention is a manhole seated in an opening for entering or leaving equipment into a sewage pipe buried on one side of a sidewalk or roadway, etc. As a cover, a multi-stage rectangular frame-shaped frame 20 is seated on the inside of the opening of the sewage pipe, and the cover 10 is seated on its upper surface, and the open arm of the link interlocking method is mounted on the inside of the cover 10. is provided to open and close the cover 10 , a power transmission box 50 is provided on an outer side of the cover 10 , and after opening the box cover 51 of the power transmission box 50 , the cover 20 ) by inserting the portable opening/closing device 60 for opening and closing the cover 20 can be conveniently opened and closed with the portable electric drill 100, and the cover 20 is fully opened 180 degrees on one side of the cover 10 without protrusion of the rotating shaft A hinge portion 70 is connected to the sash, and a safety net 80 is seated inside the cover 10 to prevent falling into the opening when opened.

That is, in the cover 10, as shown in FIGS. 3 and 5, a plate material is seated on the box-shaped cover frame 11 in which a plurality of horizontal and vertical bars are assembled, so that the opening can be safely opened and closed, and the cover (10) is provided with a locking device inside.

In addition, the guide rail 30 seated from the front to the rear is fastened to the inside of the cover 10 so that the open arm 40 is safely slid back and forth, and the guide rail 30 has a slide incision cut on both sides. The part 31 is formed to prevent the separation of the open arm 40, and on both sides of the guide rail 30, the guide rail 30 is attached to and detached from the inside of the cover 10 with a bolt. When the portion 32 is formed and the guide rail 30 is damaged by a physical impact, it can be conveniently detached for repair and replacement.

4 and 6, the frame 20 is provided with a seating jaw 21 so that the cover 10 and the safety net 80 are easily seated therein, and the cover 10 is locked from the front and Since a plurality of locking rod insertion holes 27 for releasing are provided, it is possible to firmly lock and release the cover 10 on the frame 20 .

9, the open arm 40 is connected to the power outlet 67 of the portable opening/closing device 60, and the power transmission unit 45 is fastened to one end to open and close the cover 10 and rotate. A shaft 41 is provided, one side of the boom-shaped main arm stand 42 is connected to the shaft 41 and rotates up and down, and a movable cutout 42a formed on one side of the main arm stand 42 ) The moving arm rest 43 having the moving groove 43a formed thereon to move along the move moves back and forth in response to the distance that changes according to the opening angle of the cover 10, and is formed in the concave portion formed on the other side of the moving arm stand 43. A guide roller 44 that is seated and connected with a pin to move along the slide cutout 31 of the cover 10 is provided to open and close the cover 10 while easily rotating the cover 10 up and down.

At this time, an arm replacement pin 46 that penetrates through the movable cutout 42a of the main arm 42 and the movable groove 43a of the movable arm 43 is provided to completely open the cover 10. In this case, by separating the arm restraint pin 47, the movable arm 43 is rotated and moved to completely open the cover 10, and when the cover 10 is closed, the movable arm 43 is moved to its original position. Then, the arm restraint pin 47 is fastened back to its original position so that the distance between the main arm 42 and the moving arm 43 is limited only by the distance of the moving groove 43a, and the angle is also changed so that the cover 10 is Fully opening of 180 degrees is achieved by preventing escape.

In FIGS. 11 and 12 and 13 , a space is formed inside the outer one side of the frame 20 so that the power transmission part 45 of the open arm 40 is embedded therein, and the box cover 51 is located on the upper side. A power transmission box 50 provided with a positioning pin 52 at the lower end is installed.

In addition, the portable opening/closing device 60 is inserted into the power transmission box 50 and connected to the power transmission unit 45 of the open arm 40, and the portable opening/closing device 60 has a portable electric power supply. The cover 10 is opened and closed by connecting the drill 100 .

That is, in the portable opening and closing device 60, a gear case 61 formed in a box shape for easy portability is inserted and seated in the power transmission box 50, and a portable electric drill ( The worm gear 62 to which the socket connector 64 is fastened so as to be connected to 100) is vertically installed and rotated, and the worm wheel 63 having a rotating shaft inside to be rotated in engagement with the worm gear 62 is a worm gear 62 . and a predetermined reduction ratio, and the upper chain gear 65 is fastened to one side of the rotation shaft of the worm wheel 63 and is driven, and the lower chain gear 65a connected by the upper chain gear 65 and the chain 66 is It is connected to a predetermined reduction ratio and rotated to double deceleration, and at one end of the power take-off 67 connected to the lower chain gear 65a, a connection protrusion ( 45a) while being inserted and connected from the upper side, the rotational force of the portable electric drill 100 is reduced to double and is easily transmitted, so that anyone can conveniently open and close the cover 10 without external power.

At this time, in FIG. 13 , the positioning recessed part 68 provided at the lower end of the portable opening/closing device 60 is inserted into the positioning pin 52 provided at the lower end of the power transmission box 50 so that the alignment is firm and accurate. The rotational force of the portable opening and closing device 60 is transmitted to the opening arm assay 40 .

14, the hinge part 70 is seated on both rear sides of the frame 20 and the main pin 72 is fastened to the hinge frame 71 in which the frame long hole 71a is formed so that it slides back and forth, and the main pin 72 ), a frame hinge 73 having a long frame hinge hole 73a is fastened to the frame hinge hole 73a, a sub pin 74 is fastened to the frame hinge long hole 73a, and a cover hinge 75 is fastened to the sub pin 74. It is fastened to the hinge seating portion 13 of the cover 10 so that the cover 10 can be partially opened and fully opened sequentially, and the cover can be opened 180 degrees without protrusion of the rotating shaft and used.

7, the safety net 80 is seated on a frame that is seated at the bottom of the frame 20, a plurality of bars are connected to prevent a fall to the opening when the cover 10 is opened, and the safety net 80 is connected to the shaft 41 ) is provided with a safety net fastening ring 81 formed in a ring shape for attaching and detaching.

A locking protrusion 14 for locking the rear portion of the cover 10 is provided at the rear of the cover 10, and a locking recessed portion 25 to which the locking protrusion 14 is closely attached is provided at the rear of the frame 20. It is concave to lock the rear of the cover 10 , and a cap-shaped foreign object prevention device 28 is seated on the outside of the locking recess 25 to prevent foreign substances from entering in advance.

In FIG. 11, a plurality of fence mounting holes 24 indented by screws are formed on the outside of the edge of the frame 20, and a safety fence 90 is installed at the top of the fence mounting holes 24, so that the operator or Pedestrian falls can be prevented.

In addition, inside the frame 20, the portable handle 110 is fastened to the handle mounting hole 26 provided in the frame 20 to prevent a fall when entering and exiting the sewer pipe to prevent slipping accidents when entering and exiting the sewer pipe. to prevent

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: cover 11: cover frame 12: locking device mounting hole
13: hinge seating part 14: locking protrusion
20: frame 21: seating jaw 22: hinge mounting part
23: shaft fastening hole 24: fence mounting hole 25: locking recess
26: handle mounting port 27: lock rod insertion port 28: foreign matter prevention port
30: guide rail 31: slide cutout 32: guide rail fastening part
40: open arm assembly 41: shaft 42: main arm stand
42a: moving incision 43: moving arm 43a: moving groove
43b: roller mounting hole 44: guide roller 45: power transmission unit
45a: connection protrusion 46: female fastening pin 47: female constraining pin
50: power transmission box 51: box cover 52: positioning pin
60: portable opening and closing device 61; Gear case 62: worm gear
63: worm wheel 64: socket connector 65: upper chain gear
65a: lower chain gear 66: chain 67: power take-off
67a: power take-off indentation 68: positioning indentation portion 69: handle
70: hinge part 71: hinge frame 71a: frame long hole
72: main pin 73: frame hinge 73a: frame hinge long hole
74: sub pin 75: cover hinge
80: safety net 81: safety net fastening hook 90: safety fence 100: portable electric drill 101: drill socket 110: portable handle

Claims (8)

In the square-shaped manhole cover that is seated in an opening for inflow or outflow of equipment into a sewage pipe buried on one side of a sidewalk or driveway, or a person enters and exits,
A box-shaped cover frame 11 seated on a plurality of horizontal and vertical bars to open and close the opening, and a locking device mounting hole 12 perforated on both front and upper sides in front of the cover frame 11, and the cover frame a cover 10 having hinge seating portions 13 cut out on both sides of the rear surface of 11;
a frame 20 in which a multi-stage seating jaw 21 is formed to be seated on the inner periphery of the opening, and the cover 10 is seated therein;
an open arm 40 for opening and closing the cover 10 in a link interlocking manner on both sides of the frame 20;
A space is formed so that the power transmission part 45 of the open arm 40 is embedded inside from one side of the outside of the frame 20, a box cover 51 is provided on the upper side, and a positioning pin 52 is provided at the bottom. a power transmission box 50 provided with;
After opening the box cover 51 of the power transmission box 50, it is formed in a box shape to connect with the open arm 40 while carrying, and engages with a gear and a chain to open and close the cover 10 a rotating portable opening/closing device 60;
a hinge portion 70 that is seated on the hinge seating portion 13 formed on the rear surface of the cover 10 to open and close the cover 10;
It is seated on the frame that is seated on the lower end of the frame 20 and is formed of a pair of safety nets 80 to which a plurality of bars are connected to prevent falling into the opening when the cover 10 is opened,
A guide rail 30 is seated on the inside of the cover 10 from the front to the rear so that the open arm 40 slides back and forth, and the guide rail 30 has the open arm to prevent the departure of the open arm 40 . A portable opening/closing device, characterized in that it consists of a slide cutout 31 cut on both sides to guide it, and a guide rail fastening part 32 for attaching and detaching the guide rail 30 to the inside of the cover 10 with a bolt. A square manhole cover that opens and closes. delete The method of claim 1,
The open arms 40 are seated on shaft fasteners 23 perforated on both sides of the rear surface of the frame 20 and rotated with the shaft 41, and the shaft 41 is fastened to the inside of the shaft 41 and rotates up and down and the other side The bar-shaped main arm rest 42 in which the moving cutout 42a is formed so as to slide back and forth, and the moving groove 43a so that one side rotates up and down along the moving cutout 42a of the main arm 42 and moves back and forth ) is formed, and the guide roller 44 is seated in the concave portion formed on the other side of the movable arm 43 and is connected with a pin so as to move along the slide cutout 31 of the guide rail 30 . ) is composed of
The movable arm rest (42a) of the main arm rest (42) and the arm replacement pin (46) for mutually fastening the moving groove (43a) of the moving arm rest (43) and the moving arm to reciprocate between the moving groove (43a) ( 43) is provided with an arm restraint pin 47 for restraining,
At one end of the shaft 41, a power transmission unit 45 having a connection protrusion 45a protruding vertically from one side to be connected to the portable opening and closing device 60 from the inside of the power transmission box 50 is provided. A square manhole cover that opens and closes with a portable opening and closing device, characterized in that it has been 4. The method of claim 3,
The portable opening/closing device 60 includes a gear case 61 formed in a rectangular shape to be inserted and seated in the power transmission box 50, and a socket connector to be connected to the portable electric drill 100 on the upper side of the gear case 61. A worm gear 62 to which 64 is fastened and vertically installed and rotated, a worm wheel 63 that is rotated in engagement with the worm gear 62 at a predetermined reduction ratio and has a rotating shaft inside, and a rotation shaft of the worm wheel 63 An upper chain gear 65 that is fastened to one side and driven, a lower chain gear 65a connected to the upper chain gear 65 and a chain 66 and rotated in engagement with a predetermined reduction ratio, and the lower chain gear ( 65a) and is provided with a power take-off port 67 having a power take-off recess 67a recessed downward so as to be seated while being inserted from the top into the connection protrusion 45a of the power transmission part 45 at one end of the rotation shaft. A square manhole cover that opens and closes with a portable opening and closing device, characterized in that it is composed of The method of claim 1,
The hinge part 70 is seated on both rear sides of the frame 20 and has a hinge frame 71 having a frame long hole 71a formed therein to slide back and forth, and a frame long hole 71a of the hinge frame 71 before and after. A main pin 72 fastened to move, a frame hinge 73 having a long frame hinge hole 73a formed with a long hole to be fastened to the main pin 72, and a frame hinge 73 fastened to the frame hinge long hole 73a to move back and forth It is composed of a sub-pin 74 that becomes a sub-pin 74 and a cover hinge 75 that is fastened to the sub-pin 74 and is fastened to the hinge seating part 13 of the cover 10 so that the cover 10 is rotated 180 degrees up and down. A square manhole cover that opens and closes with a portable opening and closing device, characterized in that it is formed to open and close while rotating. The method of claim 1,
A locking protrusion 14 protruding to lock the rear portion of the cover 10 is formed at the rear of the cover 10, and the locking protrusion 14 is recessed so that the locking protrusion 14 is in close contact with the rear of the frame 20. A mouth 25 is formed,
A rectangular manhole cover that opens and closes with a portable opening/closing device, characterized in that a cap-shaped foreign material prevention hole (28) is provided on the outside of the locking recess (25) to prevent the inflow of foreign materials. The method of claim 1,
A plurality of protruding positioning pins 52 are seated at the lower end of the power transmission box 50 so that the portable opening and closing device 60 is in close contact with each other,
At the lower end of the portable opening/closing device 60, a positioning concave portion 68 is provided, in which the portable opening/closing device 60 is inserted into the positioning pin 52 of the power transmission box 50 and aligned and seated. A square manhole cover that opens and closes with a portable opening and closing device, characterized in that. The method of claim 1,
The outer edge of the frame 20 is provided with a plurality of fence mounting holes 24 recessed with screws formed, and a safety fence 90 is provided at the upper portion of the fence mounting hole 24 to ensure the safety of workers and pedestrians. installed,
A rectangular manhole cover that opens and closes with a portable opening and closing device, characterized in that a portable handle 110 connected to the handle mounting port 26 is installed inside the frame 20 to prevent a fall when entering and exiting the sewage pipe.

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