KR102585958B1 - Self-rising Type Manhole by Water Pressure - Google Patents

Abstract

The present invention maintains the connection state of the manhole cover from the manhole support frame when internal water pressure is applied to the manhole on the road, and the manhole cover self-floats, locking and fixing it integrally between the support frame and the cover, effectively ensuring the stability of surrounding facilities, including pedestrians and vehicles. To provide security, a support end is formed along the outer circumference to correspond to the access road of the pipe, and an inlet communicating with the access road of the pipe is provided on the inside, with a support step protruding inward on the inlet, A manhole support frame that protrudes from the support step and includes a floating fastener that is positioned at a distance from each other and guides the lifting clearance in the locked state; A manhole cover body configured to open and close the inlet of the manhole support frame, and seated and coupled to the support step and coupled to the floating fastener to be able to float due to the internal pressure of the pipe. , a manhole cover that is seated and coupled to the support step of the manhole support frame and forms a support groove and a vertical through hole in the exact center, and is located in the lower part of the manhole cover and is coupled to the floating fastener so that it can move up and down, and supports the manhole cover. It includes a floating support that forms a locking portion at the exact center corresponding to the groove, and a manhole locking unit that is coupled to the vertical through hole toward the support groove of the manhole cover and is integrally locked and fixed by binding to the locking portion of the floating support. It provides a self-floating manhole that opens and closes by water pressure.

Description

Self-rising type manhole by Water Pressure}

The present invention relates to a self-floating manhole that opens and closes by water pressure, and more specifically, when internal water pressure is applied to a manhole on a road, the manhole cover self-floats while maintaining the connection state of the manhole cover from the manhole support frame and floats between the support frame and the cover. This relates to a self-floating manhole that is opened and closed by water pressure, which can efficiently secure the stability of surrounding facilities, including pedestrians and vehicles, while locking and fixing them as one unit.

In general, manholes are buried underground and are divided into two purposes: one for constructing or repairing electricity, water, gas, and communication facilities, and the other for collecting sewage and rainwater from roads. The manhole is divided into a manhole support frame at the bottom and a manhole at the top. It consists of a cover, and when the manhole support frame is covered with the manhole cover, the manhole cover forms a structure in which the manhole cover is accommodated and mounted inside the entrance of the manhole support frame, and is installed by embedding it in the ground, concrete, asphalt, etc. at a predetermined depth.

However, the structure of the existing manhole is that the manhole cover is simply mounted on the upper part of the manhole support frame to form a detachable joint structure, and in order to secure stable structural strength from live load, all manholes are made of metal materials of the same weight as cast iron. There was a problem that cover theft accidents occurred frequently, and safety accidents involving pedestrians and vehicles continued to occur due to manhole covers lost due to theft.

Accordingly, in order to securely secure the manhole cover and the manhole support frame, additional locking means such as bolts are often installed, and the manhole cover can be separated from the manhole support frame as needed to open the manhole entrance. Due to the nature of the structure, it must be constructed with a connection structure that can be opened and closed between the manhole cover and the manhole support frame.

As a prior art disclosed to solve the above problem, Republic of Korea Patent Publication No. 1006072 (December 29, 2010) states that a fixing groove is formed at a plurality of places on the edge of a manhole cover, and a support axis supported in the fixing groove is used as the reference. Therefore, a pressing part is placed on the inner wall of the manhole support, and a fixture consisting of a lever is provided on the opposite side; An operating bolt that penetrates the lever and is fastened to the screw groove formed in the fixing groove, and is lowered by screw rotation, and when the lever of the fixing member is rotated downward, the pressing part presses and fixes the side of the manhole support; even if an external force is applied as it is composed of There is a known manhole cover fixing device that does not shake, has a definite noise prevention effect, and can improve the reliability of the fixing function.

In addition, in Registered Patent Publication No. 693489 (2007.03.05.), a support with a female thread in the center is installed at the bottom of the inner circumferential surface of the manhole frame, and a through hole is formed in the center of the manhole cover to insert a screw so that it can rotate. , a head part in contact with the upper side of the manhole cover and a support part in contact with the bottom surface of the manhole cover are formed on the upper side of the screw, and a male thread part fastened to the female screw part of the support is formed on the lower side of the screw, and the support of the manhole frame is formed. In a manhole provided with a locking device with packing between the jaw and the manhole cover; A plurality of installation holes are formed on both sides of the inner peripheral surface of the lower end of the support ledge formed in the manhole frame; A first fastening piece is formed on one side of the support, which is directly attached and detached to the one installation hole, and a second fastening piece is formed on the other side of the support, which is shorter in length than the first fastening piece and has a fastening hole; Forming a fastening member in which a detachable installation part is formed in an installation hole on the other side of the manhole frame and a fastening part having another fastening hole corresponding to the fastening hole of the second fastening piece on the other side is integrally formed; The support is provided with a fastening pin inserted into the fastening hole of the second fastening piece and fastening member so that the support can be attached and detached from the manhole frame, so the manhole does not leave without permission, there is no noise, and the worker can easily open and close the manhole. Manholes equipped with locking devices are known.

However, in the case of the above-described prior technologies, when local heavy rain or concentrated rain occurs, the inflow exceeding the design standard flows in, generating strong water pressure due to the inflow and backflow of rainwater in the stormwater conduit, and a locking device is designed on the manhole cover to provide basic It is possible to prevent the manhole cover from coming off, but if the pressure inside the conduit continues to increase, it can cause conduit damage and an explosive manhole breakaway phenomenon. At this time, if there are people, vehicles, or nearby facilities around the manhole cover, it can cause a very dangerous safety accident and There was a problem that it would cause property damage.

In addition, the above-described prior technologies had problems in that the structure for fixing or locking the manhole cover was complicated, making manufacturing and construction difficult, or that setting up for locking or unlocking the manhole cover was cumbersome and had poor durability.

KR Registered Patent Publication No. 10-1006072 (2010.12.29.) KR Registered Patent Publication No. 10-0693489 (2007.03.05.)

The present invention is intended to solve the above problems, and the manhole cover is integrally locked and fixed to the manhole support frame, and when the internal pressure according to the water pressure in the manhole conduit is applied to the manhole, the manhole cover can self-float in a combined state with the manhole support frame. It provides a self-floating manhole that opens and closes by water pressure, which increases the security of the manhole cover, increases the safety of pedestrians, vehicles, and surrounding facilities, and secures the durability of the manhole itself and extends the life of the conduit. , it has a purpose.

The self-floating manhole that opens and closes by water pressure proposed by the present invention forms a support end along the outer circumference to be installed in response to the access road of the pipe, and has an inlet communicating with the access road of the pipe on the inside. A manhole support frame having a support step protruding from the support step and including a floating fastening portion that is formed to protrude on the support step and is positioned at a distance from each other to guide the lifting clearance in the locked state; A manhole cover body configured to open and close the inlet of the manhole support frame, and seated and coupled to the support step and coupled to the floating fastener to be able to float due to the internal pressure of the pipe. , a manhole cover that is seated and coupled to the support step of the manhole support frame and forms a support groove and a vertical through hole in the exact center, and is located in the lower part of the manhole cover and is coupled to the floating fastener so that it can move up and down, and supports the manhole cover. It includes a floating support that forms a locking portion at the exact center corresponding to the groove, and a manhole locking unit that is coupled to the vertical through hole toward the support groove of the manhole cover and is integrally locked and fixed by binding to the locking portion of the floating support. This is done.

The floating binding unit includes a binding housing forming a receiving space therein, a binding inlet formed at an upper end of the binding housing to enable introduction of the end of the floating support, and a binding entrance formed on the opposite side of the binding entrance in the binding housing, A flotation support groove is formed that extends to have a clearance area that can guide the flotation of the flotation support member.

The floating binding portion is provided with a fastener formed to penetrate up and down on the binding housing and corresponding to the floating support groove, and is coupled and installed on the fastener and accommodates the binding housing in response to the floating support groove. It constitutes a binding means for restraining and fixing the floating support combined in space.

The floating support body is provided with a push groove that is concave inwardly at the top corresponding to the locking portion and is formed to accommodate the lower part of the support groove of the manhole cover and enable contact and support.

The locking part of the floating support is formed to accommodate the manhole locking unit, but includes a locking through-hole formed through a vertical through-hole corresponding to the vertical through-hole of the manhole cover, and a guide hole extending through and forming on both sides based on the locking through-hole. And, a locking groove is formed that extends outwardly based on the locking through hole and extends in a direction perpendicular to the guide hole on the lower surface of the floating support to engage and support the manhole locking unit.

The manhole locking unit includes a locking member that engages in the support groove of the manhole cover and extends vertically to fit on the locking part of the floating support and has an operating head at the upper end, and extends outward on the locking member. A locking piece that protrudes and is formed to be capable of contacting and supporting the lower part of the locking part of the floating support at the lower part of the support groove of the manhole cover, and is fitted and coupled on the locking member, but within the support groove of the manhole cover. It constitutes a spring member located between the operation head of the locking member and in elastic contact.

According to the self-floating manhole that is opened and closed by water pressure according to the present invention, the floating support is integrally locked and fixed to the manhole cover, and the manhole cover is self-floating from the internal pressure according to the water pressure in the conduit by coupling the lifting gap to the manhole support frame so as to be guideable. Because it is constructed in such a way that it is easy to manage with the simple locking structure of the manhole cover, it prevents theft of the manhole cover, prevents safety accidents for pedestrians, vehicles, and surrounding facilities, and improves the durability of the manhole by controlling the pressure within the manhole conduit on its own. Sikkim, of course, prevents damage to the conduit and extends its lifespan.

1 is a cross-sectional view showing one embodiment according to the present invention.
Figure 2 is an exploded cross-sectional view showing one embodiment according to the present invention.
Figure 3 is a plan view showing a manhole support hole in one embodiment according to the present invention.
Figure 4 is a partial enlarged cross-sectional view showing a manhole support hole in one embodiment according to the present invention.
Figure 5 is a perspective view showing a floating binding portion in one embodiment according to the present invention.
Figure 6 is an enlarged cross-sectional view showing a manhole locking unit in one embodiment according to the present invention.
Figures 7 (a) and (b) are a plan view and a cross-sectional perspective view, respectively, showing the locking portion of the floating support in one embodiment according to the present invention.

The present invention includes a support end formed along the outer circumference to correspond to the access road of the pipe, an inlet communicating with the access road of the pipe on the inside, and a support step protruding inward on the inlet, and the support step. A manhole support frame that protrudes from the top and includes a floating fastener that is positioned at a distance from each other and guides the lifting clearance in the locked state; A manhole cover body configured to open and close the inlet of the manhole support frame, and seated and coupled to the support step and coupled to the floating fastener to be able to float due to the internal pressure of the pipe. , a manhole cover that is seated and coupled to the support step of the manhole support frame and forms a support groove and a vertical through hole in the exact center, and is located in the lower part of the manhole cover and is coupled to the floating fastener so that it can move up and down, and supports the manhole cover. It includes a floating support that forms a locking portion at the exact center corresponding to the groove, and a manhole locking unit that is coupled to the vertical through hole toward the support groove of the manhole cover and is integrally locked and fixed by binding to the locking portion of the floating support. The technical feature is a self-floating manhole that is opened and closed by water pressure.

Next, a preferred embodiment of a self-floating manhole that opens and closes by water pressure according to the present invention will be described in detail with reference to the drawings.

First, an embodiment of a self-floating manhole that opens and closes by water pressure according to the present invention, as shown in Figures 1 and 2, includes a manhole support frame 10, a manhole cover 110 and a floating support body 120, and a manhole lock. It includes a manhole cover body 100 provided with a unit 130.

The manhole support frame 10 is installed in response to the access road of the pipeline, and performs the function of accommodating the manhole cover body 100 and supporting it so that it can be mounted.

As shown in FIGS. 2 and 3, the manhole support frame 10 is made of a circular donut cross-sectional shape, and forms a flange-shaped support end 11 extending outward along the outer bottom circumference, so that it can be made of concrete, asphalt, etc. It is configured so that it can be installed on the basic structure of.

In the above, the manhole support frame 10 is located at the top of the pipeline access road and then fixed and installed on the support end 11 using a plurality of bolts.

The manhole support frame 10 is provided with an inlet 12 vertically penetrating in communication with the access road of the pipe on the inside, and the manhole cover main body 100 flows into the inlet 12 on the inside of the manhole support frame 10. ) is provided with a support step (13) protruding inward to seat and support the.

The manhole support frame 10 forms an inclined support surface 14 inclined downward inward to support and contact the manhole cover 110 on the inner upper part.

In the above, the inclined support surface 14 is formed on the upper side of the manhole support frame 10 with respect to the support step 13 to contact and support the manhole cover 110 and at the same time provide a water discharge path according to the internal pressure of the pipe. Created to provide guidance.

As shown in Figures 4 and 5, the manhole cover body 100 is fixed to the manhole support frame 10 in a locked state, but the manhole cover body 100 is bound and fixed so that the manhole cover body 100 can float due to the internal pressure of the conduit. Constructs the flotation binding unit (15).

The floating fastening portion 15 is formed to protrude on the support step 13 and is arranged at intervals along the inner circumference of the manhole support frame 10.

The floating fastening unit 15 fixes the floating support body 120 of the manhole cover body 100 in a locked state in multiple directions of the manhole support frame 10, and allows the manhole cover body 100 to be raised and lowered. It guides the gap in the limited flow range of the floating support 120.

As shown in FIG. 5, the floating binding portion 15 is a structure applied in the form of a block on the manhole support frame 10, and includes a binding housing 15a, a binding entrance 15b, and a floating support groove 15c. It is configured to be equipped.

The binding housing 15a forms an accommodating space therein that can partially accommodate one end of the floating support body 120 of the manhole cover body 100.

In the above, the binding housing 15a forms an accommodation space having a path extending in the inner circumferential direction of the manhole support frame 10. That is, an accommodation space in which the floating support body 120 accommodated in the binding housing 15a can be changed by rotation is secured.

The binding inlet 15b is formed through an upper end of the binding housing 15a in a vertical direction toward the receiving space to allow the end of the floating support 120 to enter.

The floating support groove (15c) is formed on the upper side of the binding housing (15a) opposite to the binding entrance (15b).

The floating support groove 15c extends upward from one side of the receiving space of the binding housing 15a to provide a clearance area capable of guiding the floating support member 120.

The floating fastening portion 15 is configured to maintain the floating support body 120 coupled within the fastening housing 15a in a coupled and restrained state. That is, the binding housing 15a includes a fastener 16 penetrating upward and downward, and a binding means 17 coupled to the fastener 16.

The fastener 16 is formed in the binding housing 15a to correspond to the floating support groove 15c.

The binding means 17 is coupled and installed on the fastener 16, and binds and fixes the floating support body 120 coupled in the receiving space of the binding housing 15a in response to the floating support groove 15c. That is, the binding means 17 moves from the position of the binding entrance 15b within the receiving space of the binding housing 15a and binds and fixes the floating support body 120 located corresponding to the floating support groove 15c. I do it.

The manhole cover body 100 is openably coupled to the inlet 12 of the manhole support frame 10 to perform a general lid function and at the same time performs a floating function to discharge water according to the pressure in the conduit. .

As shown in FIGS. 1 and 2, the manhole cover body 100 is seated on the support step 13 and is coupled to the floating fastening portion 15, so that it can float by the internal pressure of the pipe. It consists of a manhole cover 110, a floating support body 120, and a manhole locking unit 130.

The manhole cover 110 is seated and coupled to the support step 13 of the manhole support frame 10 so that the inlet 12 of the manhole support frame 10 can be opened and closed.

The manhole cover 110 is provided with a seating end 115 extending downward along the outer circumference and seating and contacting the support step 13 of the manhole support frame 10, and the side of the seating end 115 is An inclined contact surface 116 sloping downward inward is formed to support and contact the inclined support surface 14 of the manhole support frame 10.

Since the manhole cover 110 is provided with patterned protrusions arranged in a certain pattern on the upper surface, it is possible to effectively prevent slipping.

The manhole cover 110 is made of cast iron, a natural material in which 2.0 to 3.6% of carbon is added to iron with a melting point of 1150°C, and the melt recovery rate is more than 95%.

When the manhole cover 110 is constructed using cast iron under the above conditions, the manhole cover has a low recycling rate (less than 80%) due to the existing low carbon content and mixing of metals (lead, mercury, zinc, etc.). By preventing harmful effects, it is possible to suppress environmental destruction caused by scrap metal recycling and establish a resource circulation function.

A support groove 111 is formed at the center of the manhole cover 110, and the support groove 111 is provided with a vertical penetration hole 113 formed through the floating support body 120 to correspond to the support groove 111.

The support groove 111 extends downward toward the floating supporter 120. At this time, the support groove 111 extends downward from the seating end 115 of the manhole cover 110 so that contact force is preferentially applied to the floating support 120.

The support groove 111 is formed to be concave inward to receive and support the operating head 132 of the manhole locking unit 130, and the operating head 132 of the manhole locking unit 130 can move up and down. Form to secure operating space.

The floating supporter 120 serves to guide limited floating of the manhole cover 110 while fixing the manhole cover 110 in a locked state.

The floating support body 120 is located parallel to the lower part of the manhole cover 110 and is installed by being coupled to the floating fastening portion 15 of the manhole support frame 10. That is, the floating support body 120 is received and coupled through the binding entrance (15b) of the binding housing (15a) of the floating binding unit (15), and the binding means in the clearance area corresponding to the floating support groove (15c) It is installed and configured to be able to float by combining it according to (17).

In the above, the floating support body 120 is provided with a binding guide tool 125 vertically penetrating corresponding to the fastener 16 of the binding housing 15a, and the binding means 17 is attached to the binding guide tool 125. ) is combined to guide the vertical movement of the floating supporter 120.

The floating supporter 120 is coupled to the floating fastening portion 15 so as to be able to move up and down. That is, one end of the floating support body 120 forms a coupling structure capable of floating by high internal pressure within the conduit at a position corresponding to the floating support groove (15c) in the binding housing (15a) of the floating binding portion (15). .

A locking portion 121 is formed on the floating support body 120 at the exact center corresponding to the support groove 111 of the manhole cover 110.

As shown in FIGS. 6 and 7, the locking portion 121 is formed in a cross shape at the exact center of the floating support 120, and includes a locking through hole 121a, a guide hole 121b, and a locking groove 121c. ) is formed.

The locking through hole 121a is formed to penetrate corresponding to the vertical through hole 113 of the manhole cover 110, and is formed to accommodate the lower part of the manhole locking unit 130.

The guide hole (121b) extends on both sides of the locking through hole (121a) and penetrates in the vertical direction.

The locking groove 121c is formed in the form of a concave groove inward on the lower surface of the floating support 120 to support the manhole locking unit 130 by engaging contact with it.

The locking groove 121c extends outward from the locking hole 121a and extends in a direction perpendicular to the guide hole 121b on the lower surface of the floating support 120.

The floating support body 120 has a push groove formed to be concave inwardly at the top corresponding to the locking portion 121, and formed to enable contact and support while accommodating the lower part of the support groove 111 of the manhole cover 110. (123) is provided.

The depth of the push groove 123, that is, the distance between the push groove 123 and the lower part of the support groove 111 of the manhole cover 110, is the flow interval of the floating support body 120. It is configured to be narrower than the gap between the upper surface and the floating support groove (15c).

The manhole locking unit 130 serves to connect the manhole cover 110 and the floating support 120 to the floating support 120 in a separable structure while integrally connecting the manhole cover 110 with the floating support 120. do.

As shown in FIG. 6, the manhole locking unit 130 is a structure that can be pressed and rotated to set whether or not the manhole cover 110 is locked to the floating support 120, and the locking member 131 It consists of a locking piece (133) and a spring member (135).

The manhole locking unit 130 is coupled to the vertical penetration hole 113 facing the support groove 111 of the manhole cover 110, and is integrally coupled to the locking portion 121 of the floating support 120. It is configured to lock and secure.

The locking member 131 extends in the vertical direction to fit into the support groove 111 of the manhole cover 110 and fit onto the locking portion 121 of the floating support 120.

The locking member 131 is provided with an operating head 132 formed at the upper end and capable of being pressed while accommodated in the support groove 111.

The locking piece 133 is installed on the locking member 131 to protrude outward.

The locking piece 133 is positioned to contact and support the lower part of the support groove 111 of the manhole cover 110, so that it is coupled to the manhole cover 110 with respect to the locking member 131. Maintain relationships.

The locking piece 133 is configured to support and contact the lower part of the locking portion 121 of the floating support body 120 at the lower part of the support groove 111 fixed to the manhole cover 110. . That is, the locking piece 133 contacts and supports the lower part of the support groove 111 of the manhole cover 110 to secure the locking member 131 to the manhole cover 110. By the pressing operation, the locking piece 133 passes through the guide hole 121b of the floating support body 120, and by rotating the locking member 131, the locking groove (133) of the floating support body 120 is inserted. The locking piece 133 is contacted and supported on 121c) to integrally fix the manhole cover 110 and the floating support body 120.

The spring member 135 is fitted onto the locking member 131 and installed in the support groove 111 of the manhole cover 110.

The spring member 135 is located between the support groove 111 of the manhole cover 110 and the operating head 132 of the locking member 131 to provide elastic repulsion force according to the pressing contact force of the operating head 132. Supports contact to exert . That is, the spring member 135 elastically supports the locking member 131 to restore the position according to the pressing operation of the operating head 132.

That is, according to the self-floating manhole that opens and closes by water pressure according to the present invention configured as described above, the floating support is integrally locked and fixed to the manhole cover and is coupled to the manhole support frame so as to guide the lifting clearance, so that the inside according to the water pressure in the conduit Since the manhole cover self-floats from pressure, the simple locking structure of the manhole cover makes it easy to manage, prevents theft of the manhole cover, prevents safety accidents for pedestrians, vehicles, and surrounding facilities, and automatically releases the pressure within the manhole conduit. By controlling it, it is possible to not only improve the durability of the manhole but also prevent damage to the conduit and extend its lifespan.

Although the preferred embodiment of the self-floating manhole that opens and closes by water pressure according to the present invention has been described above, the present invention is not limited thereto and may be modified in various ways within the scope of the claims, the specification of the invention, and the accompanying drawings. It is possible to implement this, and this also falls within the scope of the present invention.

10: Manhole support frame 11: Support end 12: Inlet
13: Support step 14: Inclined support surface 15: Injury binding unit
15a: Binding housing 15b: Binding entrance 15c: Flotation support groove
16: Fastener 17: Binding means 100: Manhole cover body
110: Manhole cover 111: Support groove 113: Vertical penetration hole
115: Seating end 116: Inclined contact surface 120: Floating supporter
121: Locking part 121a: Locking penetration hole 121b: Guide hole
121c: Lock groove 123: Push groove 125: Binding guide hole
130: Manhole locking unit 131: Locking member 132: Operating head
133: Locking piece 135: Spring member

Claims (6)

A support end 11 is formed along the outer circumference to correspond to the access road of the pipe, and an inlet 12 communicating with the access road of the pipe is provided on the inside, with a support step 13 protruding inward on the inlet. A manhole support frame (10), which is provided and includes a floating fastening portion (15) that protrudes from the support step and is positioned at a distance from each other to guide the lifting clearance in the locked state;
The manhole is configured to open and close the inlet 12 of the manhole support frame 10, and is seated and coupled to the support step 13 and is coupled to the floating fastening portion 15 to enable it to float by the internal pressure of the pipe. Includes a lid body (100),
The manhole cover body 100 includes a manhole cover 110 that is seated and coupled to the support step 13 of the manhole support frame 10 and forms a support groove 111 and a vertical penetration hole 113 at the center, and It is located at the lower part of the manhole cover 110, is coupled to the floating fastening part 15 so as to be able to move up and down, and forms a locking part 121 at the exact center corresponding to the support groove 111 of the manhole cover 110. The support body 120 is coupled to the vertical penetration hole 113 facing the support groove 111 of the manhole cover 110, and is integrally locked by binding to the locking portion 121 of the floating support body 120. It includes a manhole locking unit 130 that secures,
The floating binding unit 15 includes a binding housing 15a forming a receiving space therein, a binding entrance 15b forming an upper end of the binding housing to allow the end of the floating support 120 to be introduced, and , It is formed on the opposite side of the binding entrance (15b) in the binding housing (15a) and includes a floating support groove (15c) extending to have a clearance area that can guide the floating of the floating support body (120),
The floating binding portion 15 is provided with a fastener 16 formed to penetrate upward and downward on the binding housing 15a and corresponding to the floating support groove 15c, and is coupled and installed on the fastener. It includes a binding means (17) for constraining and fixing the floating support body (120) coupled in the receiving space of the binding housing (15a) in response to the floating support groove (15c),
The floating support body 120 is provided with a binding guide tool 125 vertically penetrating corresponding to the fastener 16 of the binding housing 15a, and the binding means 17 is attached to the binding guide tool 125. This combination guides the vertical movement of the floating support 120,
The floating support body 120 has a push groove formed to be concave inwardly at the top corresponding to the locking portion 121 and capable of contacting and supporting the lower part of the support groove 111 of the manhole cover 110. (123), wherein the distance between the push groove 123 and the lower part of the support groove 111 of the manhole cover 110 is the flow interval of the floating support body 120. It is configured to be narrower than the gap between the upper surface and the floating support groove (15c),
The locking portion 121 of the floating support 120 is formed to accommodate the manhole locking unit 130, and is formed through a locking through hole corresponding to the vertical through hole 113 of the manhole cover 110. 121a), a guide hole 121b extending through and extending on both sides of the locking through-hole, and extending outward from the locking through-hole, but extending in a direction perpendicular to the guide hole on the lower surface of the floating support. A self-floating manhole that is opened and closed by water pressure and includes a locking groove (121c) that supports the manhole locking unit (130).
delete delete delete delete In claim 1,
The manhole locking unit includes a locking member that engages in the support groove of the manhole cover and extends vertically to fit on the locking part of the floating support and has an operating head at the upper end, and extends outward on the locking member. A locking piece that protrudes and is formed to be capable of contacting and supporting the lower part of the locking part of the floating support at the lower part of the support groove of the manhole cover, and is fitted and coupled on the locking member, but within the support groove of the manhole cover. A self-floating manhole that is opened and closed by water pressure, including a spring member located between the operating head of the locking member and in elastic contact.

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