KR102664006B1 - Fall arrest safety net for manhole - Google Patents

Abstract

The present invention relates to a fall-prevention safety net for a manhole, and provides a fall-prevention safety net by inserting and fixing the ends of support rods on both sides of a grating, where both sides are rotatably folded by a hinge member, in a manhole, and fastening bolts and nuts. Even if the manhole cover is separated due to the backflow of water due to strong water pressure, it remains solid and prevents pedestrians crossing a flooded road from being sucked into the manhole, preventing human accidents, and during general manhole internal maintenance work. It is also effective in preventing safety accidents that occur when pedestrians fall into a manhole while passing through it without being able to spot it.

Description

Fall arrest safety net for manhole}

The present invention relates to a fall prevention safety net for a manhole, and more specifically, is provided to be detachable inside the entrance side of a circular manhole, so as to open the manhole cover due to backflow pressure during manhole internal management work or due to heavy rainfall, and around the manhole on the ground. This relates to a manhole fall prevention safety net that improves the safety net that prevents pedestrians from falling due to flooding so that it is easy to install, securely fixed, and can be easily removed from the manhole when necessary.

In general, a manhole is a hole made to allow people to enter and exit from the road surface to the underground. Depending on the use, it is divided into water supply, sewerage, rainwater, sewage, and telecommunications, and is installed at regular intervals on the road. It is done.

Due to rapid urbanization, cities covered with asphalt and cement did not attach importance to the construction of drainage systems.

However, in recent years, heavy rainfall due to abnormal climate has occurred frequently, causing frequent flooding, and the resulting damage is becoming increasingly serious.

Therefore, increasing the stormwater drainage capacity of the stormwater conduit system is an essential element to prevent flooding in urban areas.

Storm water conduit facilities are comprised of facilities including conduits, manholes, storm drains, water drains, and connection pipes.

In addition, manholes are installed at certain distances as entrances and exits for maintenance and management of the stormwater conduit system. These manholes are installed in places where the inclination, direction, and diameter of the pipe change.

Therefore, manholes are generally common in places such as roadways, sidewalks, and residential areas, but when the manhole cover is opened for manhole work, a pedestrian who does not realize that work is in progress may fall into a sewer pipe and fall, causing serious injury to the pedestrian. In addition, there was a risk of injury to workers working on the sewer pipe.

In addition, there are cases where water flows backwards into conduits in low flood areas due to heavy rainfall, opening tightly closed manhole covers due to strong water pressure (backflow pressure), and the backflow water rises to the ground, causing flooding in flooded areas. In the process of evacuating, casualties may occur where people are sucked into the manhole conduit.

Looking at the source technology considering the above, Republic of Korea Patent No. 10-0725352 (name: Manhole cover escape prevention device, hereinafter referred to as 'Patent Document 1') and Publication Patent No. 10-2011-0025507 (name: : Safety manhole structure, hereinafter referred to as 'Patent Document 2') is disclosed.

Patent Document 1 is intended to prevent pedestrians or vehicles from falling into manholes due to the manhole cover being detached due to the impact of vehicle wheels or the action of water pressure during a flood.

A manhole body installed at the top of the manhole to form an entrance, a manhole cover to open and close the manhole body, and a circular lid center support plate and ring on the inner upper part of the rim to support the manhole cover. The support bar provided is formed, and the height of the top of the rim, the top of the lid center support plate, and the top of the ring are formed to be the same as the height of the stopper formed inside the manhole body, so that the top of the rim, the top of the lid center support plate, and the upper surface of the ring are all aligned with the manhole. In the manhole cover separation prevention device consisting of a support frame for supporting the cover in close contact with the bottom surface,

The main body has a plurality of through holes formed in the lid seating portion, and fastening means made of bolts and nuts are coupled to the through holes. The support frame is made of a circular rim with a plate shape at the edge, and the rim is provided with An "L" shaped fastening groove is formed to correspond to the fastening means, and the fastening means is screwed into the fastening groove to fix the support frame.

In other words, by firmly fixing the support frame to the manhole body with a fastening means, the opening of the manhole cover can be minimized, and even if the manhole cover is opened, accidents such as pedestrians falling and vehicle wheels falling off can be minimized. I am trying to have it.

However, the fixing of the support frame is done by guiding and fixing the "ㄱ" shaped fastening groove provided on the support frame between the nuts fastened to the fixing bolts on the inside of the main body with fixing bolts installed penetrating from the outside of the main body, so due to the nature of the manhole, the road An unexpected safety accident may occur because the fastening grooves of the support frame may deviate from the fixing bolts and be deformed or separated due to vibration, backflow pressure, or backflow, which causes the objects to become caught and the nuts to loosen due to resistance.

Patent Document 2 above states that the manhole cover can be simply and easily fixed in position while inserted into the through hole of the manhole body, and is designed to prevent separation due to backflow of water and sewage. A manhole body installed on the upper side of the slab connected to the flow pipe, and having a circular through hole in the center communicating with the inside of the slab, and having a plurality of long grooves formed vertically along the inner peripheral surface of the through hole; and is provided in a circular shape corresponding to the through hole, covers and closes the upper side of the through hole by being seated on a step formed on an inner peripheral surface of the through hole, and is inserted into each of the plurality of long grooves so as to communicate with the plurality of long grooves horizontally. It includes a manhole cover formed on the outer surface of a plurality of protruding keys that are transported along a guide groove formed by , It is configured to prevent separation while covering the upper side of the through hole.

In addition, inside the manhole, an auxiliary manhole cover for fall prevention is fastened in a spiral shape, which serves the auxiliary role of closing the through hole of the manhole body and prevents safety accidents such as pedestrians or workers falling into the through hole. can do.

However, the auxiliary manhole cover as described above is fastened and fixed within the manhole using a screw method, and is perfectly fixed with a lock key. However, not only is the work of fastening or removing it very cumbersome, but it is also susceptible to water or moisture due to long-term neglect. There is a problem that it becomes difficult to open due to corrosion of the fastening area, and even if it is opened, there is a problem that the corroded part of the spiral fastening area must be managed to ensure that the screw is properly fastened for re-fastening.

Korean Patent No. 10-0725352 (registered on May 29, 2007) Korean Patent Publication No. 10-2011-0025507 (published March 10, 2011)

The present invention was invented to solve the conventional problems as described above, and is detachably provided inside the entrance side of a circular manhole, so that the manhole cover is opened due to backflow pressure during manhole internal maintenance work or due to heavy rainfall and the ground. The purpose is to improve the safety net that prevents pedestrians from falling due to flooding around the manhole, and to provide a manhole fall prevention safety net that is easy to install, securely fixed, and can be easily separated from the manhole when necessary.

According to the present invention to achieve the above object, a first diameter part on which a circular manhole cover is seated and a second diameter part with a small multi-stage diameter from below the first diameter part are installed to prevent falling into the inside of the manhole frame. In the fall prevention safety net for manholes,

The fall prevention safety net is,

It is composed of a combination of a band-shaped end bar forming a square frame, a bearing bar whose both ends are welded to the inner surface of the end bar with a gap between the end bars, and a cross bar which is welded at intervals to the bearing bar and both ends welded to the end bar. On the outside of the end bar, a pair of gratings with an auxiliary support bar bent on one side to reduce the space with the second diameter of the manhole frame are attached, a hinge member welded to the end bar of the grating to rotatably connect the grating, and , Penetrating the end bar of the grating on the opposite side equipped with the hinge member, it is attached to the bearing bar at intervals by welding at the intersection point where the end bar passes through the end bar, and the end is attached to a support hole provided corresponding to the side circumference of the second diameter portion of the manhole frame. A round bar-shaped reinforcement bar that is welded and attached to one of the end bars of the grating to which the hinge member is attached and fills and supports the space between the guided support bar and the grating spread on both sides, and is penetrated and fastened to the end bar of the grating to which the hinge member is attached. It is characterized by including bolts and nuts that prevent the grating on the left and right sides from bending.

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In the grating according to the present invention, the end bar forming the outline between the end bar through which the support rod penetrates and the hinge member is formed in an arc shape corresponding to the inner diameter of the manhole frame, and the end bar through which the support rod penetrates has a second diameter portion of the manhole frame. It is characterized by an additional auxiliary support bar with a bent side on one side to reduce the space between the and.

The grating is characterized in that semicircular end bars form an outline from both ends of the end bar to which the hinge member is attached and are formed in a semicircular shape corresponding to the inner diameter of the manhole frame.

The fall prevention safety net for a manhole according to the present invention is to insert and secure the ends of support rods on both sides of the grating, which are rotatably folded on both sides by a hinge member in the manhole, and fasten bolts and nuts. By providing a fall prevention safety net, Even if the manhole cover is separated due to the backflow of water due to strong water pressure, it remains sturdy and prevents pedestrians crossing a flooded road from being sucked into the manhole, preventing fatal accidents, and even during general manhole internal maintenance work. It is effective in preventing safety accidents that occur when pedestrians fall into a manhole while passing through it without being able to spot it.

1 is a perspective view illustrating the installation state of the manhole fall prevention safety net of the present invention;
Figure 2 is a perspective view showing a fall prevention safety net according to the present invention;
Figure 3 is a perspective view illustrating a state in which the hanging bar of the fall prevention safety net according to the present invention is attached;
Figure 4 is a side view showing the folded state of the fall prevention safety net according to the present invention;
Figure 5 (a) (b) is a side view showing the state in which the fall prevention safety net according to the present invention is mounted and fixed in a manhole,
Figure 6 is a side cross-sectional view of the manhole illustrating a state in which a pedestrian is standing on the fall prevention safety net in Figure 5;
Figure 7 is a plan view showing a state in which a fall prevention safety net is installed within according to the present invention;
Figure 8 is a plan view showing a state in which an auxiliary support bar is further provided in the fall prevention safety net according to the present invention;
9 and 10 are plan views showing a fall prevention safety net of another embodiment according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, they can be replaced. It should be understood that various equivalents and variations may exist.

The fall prevention safety net according to the present invention will be described with reference to the attached FIGS. 1 to 10 as follows.

To prevent falling into the inside of the manhole frame (2), which has a first diameter portion (2a) on which the circular manhole cover (1) is seated and a second diameter portion (2b) with a small multi-stage diameter from below the first diameter portion. In the fall prevention safety net (10) for a manhole installed,

The fall prevention safety net 10 is, as shown in Figures 1 and 2 attached,

It is manufactured using a grating (12) that sits on top of a water collection well (manhole), gutter pipe, etc. to guide drainage from the outside and prevent pedestrians from falling. It is manufactured by connecting and combining a pair of square gratings. .

The grating 12 includes a strip-shaped end bar 12a forming a square outer frame, a bearing bar 12b whose both ends are welded to the inner surface of the end bar 12a with a gap between the end bars, and a bearing bar. It is composed of a combination of a crossbar (12c) welded at intervals to (12b) and both ends welded to an end bar (12a).

The fall prevention safety net 10 is preferably made of a corrosion-resistant steel material.

In the grating 12 as described above, two hinge members 14 are welded and attached to the end bar 12a so that the grating can be rotated to the left and right.

In addition, the support hole 2c is provided corresponding to the side circumference of the second diameter portion 2b of the manhole frame 2 at a distance from the end bar 12a of the grating 12 on the opposite side where the hinge member 14 is provided. ) A support rod (16) whose end is guided is attached.

The support hole 2c is preferably formed to have a diameter through which the support rod 16 can be easily guided.

Considering durability, the support bar 16 penetrates the end bar 12a and is attached to the bearing bar 12b by welding at the intersection of its end and the end bar 12a. As shown in the attached FIG. 3, a through hole through which the support bar 16 passes is formed in the end bar 12a of the grating 12, and the support bar 16 is passed through and then attached by performing intersection welding.

On the end bar 12 side of the grating 12 to which the hinge member 14 is attached, a bolt (B) that prevents bending when the left and right gratings 12 are unfolded penetrates the end bar and is inserted into the end bar side of the opposite grating. By tightening the nut (N), the unfolded state of the grating (12) is maintained.

The bolts (B) are connected by fastening a nut on the opposite side through a connection hole formed on the end bar 12 side of the corresponding grating 12.

The attached Figure 8 shows a fall prevention safety net of an embodiment according to the present invention, and on the outside of the end bar (12a) of the grating (12) is provided to reduce the space with the second diameter portion (2b) of the manhole frame (2). It can also be applied in a form where an auxiliary support bar (12d) bent on one side is further attached.

Between the end bars (12a) of the grating (12) to which the hinge member (14) is attached, a round bar-shaped reinforcement bar (18) that fills and supports the space between the gratings (12) spread on both sides is provided on one of the end bars (12). is attached by welding. The reinforcing bars 18 are disposed and attached between end bars corresponding to each other based on the hinge member 14, and are attached one or more.

As shown in FIG. 9, the grating 12 has an end bar 12a forming the outline between the end bar 12a through which the support rod 16 penetrates and the hinge member 14, which is inside the manhole frame 2. It is formed in a corresponding arc shape at intervals in diameter, and the end bar (12a) through which the support bar (16) passes is an auxiliary support bar bent on one side to reduce the space with the second diameter part (2b) of the manhole frame (2). (12d) is further attached.

In addition, as shown in the attached FIG. 10, the grating 12 has semicircular end bars 12a forming an outer perimeter from both ends of the end bar 12a to which the hinge member 14 is attached, thereby forming the manhole frame 2. It is formed in a semicircular shape corresponding to the inner diameter of the at intervals.

The operation of the installation of the fall prevention safety net for manholes of the present invention configured as described above is described as follows.

Installation of the fall prevention safety net 10 of the present invention is performed by installing the folded fall prevention safety net 10 as shown in Figure 4 with the manhole cover 1 open and the grating on the left and right as shown in (a) of Figure 5 attached. Spread (12) at a predetermined angle.

In the state of unfolding at a predetermined angle as described above, the end of the support rod 16 provided on each grating 12 is inserted into the support hole 12c formed in the second diameter portion 2b of the manhole frame 2, thereby creating a hinge. Spread the grating (12) on both sides around the member (14).

The fall prevention safety net 10 installed as described above is supported so that even if a person stands on the upper part of the grating 12, he or she does not fall into the manhole.

In the above state, the bolts (B) and nuts (N) are used to fasten the connecting hole provided in the end bar (12a) of the unfolded grating (12) as described above, so that the grating is folded in the reverse direction as at the time of installation. prevent the condition.

This means that even if the manhole cover (1) is separated due to water pressure flowing strongly back through the manhole due to concentrated rainfall, and the back-flowing water comes out onto the road side and floods the road, the installation state of the fall prevention safety net (10) remains. It is maintained to prevent casualties from pedestrians walking in flooded areas falling into manholes.

That is, due to the nature of the grating (12), it is made up of a combination of the end bar (12a), the bearing bar (12b), and the cross bar (12c), so that even though backflow water passes smoothly, other impurities are filtered out, and the support bar (16) has 4 The point is fixed, and the installation of the fall prevention safety net (10) is maintained by firmly supporting the grating (12) as a reinforcement bar (18) along with the fastening of the bolt (B) and nut (B), thereby preventing falling into the manhole. Accidents can be prevented.

The attached Figures 8 to 10 show that by attaching an auxiliary support bar (12d) to the outer part of the end bar (12a) of the grating (12), the empty space of the inner diameter of the circular manhole is used as an auxiliary support bar (12d). By forming the end bar of the grating into an arc or semicircle to fill the inner diameter of the manhole, even small feet such as children cannot easily fall in or get caught, thus ensuring the safety of pedestrians as much as possible.

Even if the fall prevention safety net 10 according to the present invention is fixed to the support hole 2c on the second diameter portion 2b of the manhole without fastening the bolts and nuts during general manhole-related work, it can be used by a walking person. You can easily prevent falling into a manhole.

In this example, by temporarily installing the fall prevention safety net (10) in the manhole during internal construction and management work of the manhole frame (2), accidents involving falling into the manhole while walking can be prevented in advance, thereby preventing manhole work. The city also provides pedestrian safety.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , those skilled in the art can make various modifications and variations from this description.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described below as well as all things that are equivalent or equivalent to the scope of the claims will be said to fall within the scope of the spirit of the present invention. .

1: Manhole cover 2: Manhole frame
2a: first diameter portion 2b: second diameter portion
2c: Support hole 10: Fall prevention safety net
12: Grating 12a: End bar
12b: bearing bar 12c: crossbar
12d: Auxiliary support bar 14: Hinge member
16: support rod 18: reinforcement bar
B: Bolt N: Nut

Claims (6)

To prevent falling into the inside of the manhole frame (2), which has a first diameter portion (2a) on which the circular manhole cover (1) is seated and a second diameter portion (2b) with a small multi-stage diameter from below the first diameter portion. In the fall prevention safety net 10 for a manhole installed,
The fall prevention safety net (10) is,
A band-shaped end bar (12a) forming a rectangular frame is spaced between the end bars, and both ends are welded to a bearing bar (12b) and a bearing bar (12b) welded to the inner surface of the end bar (12a) at intervals. It is composed of a combination of a crossbar (12c) welded at both ends to the end bar (12a), and an auxiliary side is bent on the outside of the end bar (12a) to reduce the space with the second diameter portion (2b) of the manhole frame (2). A pair of gratings (12) with support bars (12d) attached,
A hinge member (14) welded to the end bar (12a) of the grating (12) to rotatably connect the grating,
The hinge member 14 penetrates the end bar 12a of the grating 12 on the opposite side and is attached to the bearing bar 12b at intervals by welding at the intersection of the end bar 12a and the end bar 12b, forming a manhole. A support rod (16) whose end is guided into a support hole (2c) provided corresponding to the side circumference of the second diameter portion (2b) of the frame (2),
A round bar-shaped reinforcement bar 18 that is welded and attached to any of the end bars 12a of the grating 12 to which the hinge member 14 is attached and fills and supports the space between the gratings 12 spread on both sides. ,
It is characterized by including a bolt (B) and a nut (N) that are fastened through the end bar (12) of the grating (12) to which the hinge member (14) is attached and prevent the grating (12) on the left and right sides from bending. Fall prevention safety net for manholes.
delete delete delete According to paragraph 1,
The grating (12) has an end bar (12a) forming the outline between the end bar (12a) through which the support rod (16) penetrates and the hinge member (14), which corresponds to the inner diameter of the manhole frame (2) at intervals. It is formed in an arc shape, and an auxiliary support bar (12d) with one side bent to reduce the space with the second diameter portion (2b) of the manhole frame (2) is further attached to the end bar (12a) through which the support bar (16) passes. A fall prevention safety net for a manhole, characterized in that.
According to paragraph 1,
The grating 12 is formed by semicircular end bars 12a from both ends of the end bar 12a to which the hinge member 14 is attached, and is formed in a semicircular shape corresponding to the inner diameter of the manhole frame 2 at an interval. A fall prevention safety net for a manhole, characterized in that it is formed.

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