A kind of anti-falling structure for municipal manholes

Abstract

The present application discloses an anti-falling structure for municipal manholes, which relates to the technical field of municipal engineering. It includes an installation frame and an installation seat arranged on the circumferential side wall of the well. The installation frame includes a plurality of installation columns that enclose to form the installation frame. The installation columns are arranged oppositely, and both ends of the installation columns are respectively provided with connecting columns, and the connecting columns slide up and down on the installation seat; Two support columns are symmetrically arranged between the opposite installation columns, and the support columns are slidably connected to the installation columns. The installation columns are provided with elastic driving members for driving the support columns to approach the middle of the installation frame. The installation seat is provided with a lapping groove, and the installation frame is provided with a driving assembly for driving the support columns to move away from the middle of the installation frame when a manhole cover covers the lapping groove. The present application can improve the drainage effect of the manhole.

Description

Technical Field

[0001] The present application relates to the technical field of municipal engineering, and in particular to a municipal manhole anti-fall structure. Background Art

[0002] In order to reduce the risk of pedestrians falling into a manhole when the manhole cover is open or lost, and to avoid safety hazards, anti-fall structures are usually installed in the manhole.

[0003] At present, the common anti-fall structure of manholes is an anti-fall net. When setting it up, a plurality of hooks are usually set along the circumference of the manhole wall, and then the anti-fall net is hooked and fixed on the hooks, so that the anti-fall net is spread out in the manhole. When the manhole cover is open or missing and pedestrians fall into the manhole, the pedestrians are supported by the anti-fall net, which is conducive to reducing the occurrence of safety hazards.

[0004] With respect to the above-mentioned related technologies, the inventors found the following defects: small-volume garbage on the road surface can easily follow the water flow into the manhole through the water holes on the manhole cover, and at this time it is blocked by the anti-fall net, and the garbage accumulates on the anti-fall net, making it difficult to clean up. Summary of the invention

[0005] In order to reduce the amount of garbage accumulated on the anti-fall structure, the present application provides a municipal manhole anti-fall structure.

[0006] The present application provides a municipal manhole anti-fall structure, which adopts the following technical solutions:

[0007] A municipal manhole anti-fall structure comprises a mounting frame and a mounting seat arranged on the surrounding manhole wall, wherein the mounting frame comprises a plurality of mounting posts arranged opposite to each other, the mounting frame is provided with connecting posts corresponding to both ends of the mounting posts one by one, and the connecting posts slide up and down on the mounting seat;

[0008] Two support columns are symmetrically arranged relative to the installation columns, and the support columns are slidably connected to the installation columns. The installation columns are provided with elastic driving members for driving the support columns to approach the middle part of the installation frame. The mounting seat is provided with a lap groove, and the installation frame is provided with a driving component for driving the support columns to move away from the middle part of the installation frame when the manhole cover overlaps the lap groove.

[0009] By adopting the above technical solution, when the manhole cover is away from the overlap groove, the elastic driving member drives the support column to slide to the middle position of the installation frame. At this time, the support column and the installation block form an anti-falling net structure, reducing the possibility of safety hazards. When the manhole cover is overlapped in the overlap groove, the driving component drives the support column to slide toward the connecting column, increasing the size of the gap in the middle of the installation frame for garbage to pass through, which is conducive to reducing the amount of garbage accumulated on the anti-falling structure.

[0010] Optionally, support grooves are respectively formed on the opposite sides of the installation posts, the ends of the support columns slide in the support grooves, the elastic driving member is a driving spring, the driving spring is installed in the support groove, one end of the driving spring abuts against the support column, and the other end abuts against the groove wall of the support groove close to the mounting seat.

[0011] By adopting the above technical solution, during use, the elastic driving member drives the support column to move away from the connecting column, so that the support column moves to a position close to the middle of the installation frame. At this time, the support column and the installation frame cooperate to form a safety net structure, which is beneficial to reducing the possibility of safety accidents.

[0012] Optionally, the driving assembly includes a driving column and a driving rope. The driving column slides up and down on the connecting column. The driving rope slides through the connecting column and the installation frame respectively. One end of the driving rope is connected to the driving column, and the other end is connected to the support column. When the support column is close to the middle of the installation frame, the driving column protrudes upward out of the connecting column. When the manhole cover overlaps the overlapping groove, the driving column pulls the support column away from the middle of the installation frame.

[0013] By adopting the above technical solution, when the manhole cover covers the overlapping groove, it presses the driving column, so that the driving rope pulls the support column to move towards the connecting column, increasing the size of the gap for garbage to pass through.

[0014] Optionally, an installation sleeve is rotatably arranged on the installation seat, a limiting plate is arranged on the installation sleeve, and the installation seat is provided with a control member for controlling the installation sleeve to rotate to a position where the limiting plate is directly below the driving column when the manhole cover is away from the overlapping groove. When the limiting plate is directly below the driving column, the driving column abuts against the limiting plate;

[0015] A push column is slidably arranged up and down on the driving column. A power column that can approach or move away from the installation sleeve slides horizontally on the driving column. A power surface is inclined on the side of the power column close to the push column. When the push column slides on the power surface, it pushes the power column towards the installation sleeve. A transmission hole aligned with the power column is formed horizontally on the connecting column. A transmission column slidably connected to the transmission hole is arranged on the connecting column. When the driving column abuts against the limiting plate, the transmission column and the power column are in the same straight line;

[0016] The connecting column is provided with an elastic power member, the elastic power member enables the transmission column to push the power column to slide out of the transmission hole towards the driving column, and the driving column is provided with a limiting member for limiting the transmission column to protrude out of the transmission hole towards the driving column;

[0017] A plurality of driving blocks corresponding to the driving columns are arranged on the inner peripheral side wall of the installation sleeve. The driving blocks are inclined to form a driving surface facing the driving column. When the driving column slides on the driving surface, the driving column drives the installation sleeve to rotate;

[0018] The driving block is slidably connected with a plugging column capable of being inserted into the transmission hole, and the driving block is provided with an elastic pushing member for driving the plugging column to slide towards the transmission hole.

[0019] By adopting the above technical solution, when the plugging column is inserted into the transmission hole and all the pushing columns corresponding to the driving block are not simultaneously pressed downwards, the rotation of the installation sleeve is restricted by the plugging column, which is beneficial to reducing the possibility that the support column slides towards the connecting column during the anti-falling period caused by accidental touch.

[0020] Optionally, the control member is an elastic rope. There are a plurality of elastic ropes, which are arranged at intervals in the circumferential direction between the installation sleeve and the installation seat. One end of the elastic rope is connected to the outer peripheral side of the installation sleeve, and the other end is connected to the installation seat. When the elastic rope elastically releases, it drives the installation sleeve to rotate until the limiting plate abuts against the bottom of the driving column.

[0021] By adopting the above technical solution, when the elastic rope releases, it pulls the installation sleeve to rotate, so that the limiting plate slides to the bottom of the driving column.

[0022] Optionally, the limiting member is a limiting block. The limiting block is arranged on the outer peripheral side of the driving column, and a limiting groove for the limiting block to slide is formed on the circumferential side wall of the transmission hole.

[0023] By adopting the above technical solution, the limiting block slides in the limiting groove, reducing the possibility of the driving column disengaging from the transmission hole.

[0024] Optionally, the elastic power member is a power spring. The power spring is installed in the limiting groove. One end of the power spring abuts against the side of the limiting block away from the driving column, and the other end abuts against the limiting groove.

[0025] By adopting the above technical solution, when the power spring elastically releases, it pushes the driving column towards the installation column.

[0026] Optionally, the elastic pushing member is a pushing spring. The driving block is provided with a receiving groove for the plugging column to slide. The pushing spring is installed in the receiving groove. One end of the pushing spring abuts against the plugging column, and the other end abuts against the side wall of the receiving groove away from the groove opening.

[0027] By adopting the above technical solution, when the pushing spring elastically releases, it pushes the plugging column to be inserted into the transmission hole.

[0028] In summary, the present application includes at least one of the following beneficial effects:

[0029] 1. When the manhole cover is placed on the lapping groove, the driving assembly drives the support column to move towards the connecting column, increasing the area of the anti-falling net for garbage to pass through, which is beneficial to reducing the amount of garbage accumulated on the anti-falling structure;

[0030] 2. The insertion column is inserted into the transmission hole. When the pushing columns are not all pressed down simultaneously, the installation sleeve is restricted by the insertion column, reducing the possibility of the installation sleeve rotating, which is beneficial to reducing the possibility of the support column sliding towards the connecting column during the anti-falling process. Description of the Drawings

[0031] Figure 1 is a schematic diagram showing the state before the manhole cover is placed in the embodiment of the present application;

[0032] Figure 2 is Figure 1 an enlarged schematic view of part A of

[0033] Figure 3 is an internal cross-sectional schematic diagram showing the state before the manhole cover is placed in the embodiment of the present application;

[0034] Figure 4 is Figure 3 an enlarged schematic view of part B of

[0035] Figure 5 is an internal cross-sectional schematic diagram of the embodiment of the present application;

[0036] Figure 6 is Figure 5 an enlarged schematic view of part C of

[0037] Reference numerals: 1, installation frame; 11, installation column; 111, support groove; 112, driving spring; 12, support column; 2, installation seat; 21, lapping groove; 22, installation sleeve; 221, limiting plate; 222, driving block; 223, driving surface; 224, insertion column; 2241, pushing surface; 225, receiving groove; 226, pushing spring; 23, elastic rope; 24, connecting groove; 25, installation groove; 3, connecting column; 31, transmission hole; 311, limiting groove; 312, power spring; 32, transmission column; 321, limiting block; 4, driving assembly; 41, driving column; 411, pushing column; 412, power column; 4121, power surface; 413, driving hole; 414, pushing groove; 415, power groove; 42, driving rope. Detailed Description of the Embodiment

[0038] The following further elaborates on the present application in conjunction with the attached Figures 1-6 drawings.

[0039] The embodiment of the present application discloses an anti-falling structure for municipal manholes. Refer to Figure 1, The anti-falling structure of the municipal manhole includes an installation frame 1 and an installation seat 2. The installation seat 2 is of an annular structure and is embedded in the well wall on the peripheral side of the manhole near the wellhead. The installation frame 1 is formed by enclosing a plurality of installation columns 11 which are arranged oppositely in a long strip columnar structure. In the embodiment of the present application, the number of the installation columns 11 is four, and the installation columns 11 are connected end to end to enclose an installation frame 1 in a square frame structure.

[0040] See Figure 1 and Figure 2 , An annular lap joint groove 21 is provided at the inner wall and the top of the peripheral side of the installation seat 2. When in use, the manhole cover is lapped in the lap joint groove 21. A connecting column 3 corresponding to each end of each installation column 11 is fixedly connected to the outer peripheral side of the installation frame 1. Connecting grooves 24 corresponding to the connecting columns 3 one by one and extending downward are respectively provided at the bottom groove wall of the lap joint groove 21. The connecting columns 3 slide up and down in the connecting grooves 24, so that the installation seat 2 supports the installation frame 1 through the connecting columns 3.

[0041] See Figure 1 and Figure 2 , Two groups of support columns 12 are arranged in the installation frame 1. Each group of installation columns 11 is respectively arranged between two opposite installation columns 11 and is perpendicular to each other. The two support columns 12 are arranged up and down in a staggered manner. Each group of support columns 12 has two. Support grooves 111 extending along the length direction are respectively provided on the opposite sides of the two opposite installation columns 11 facing each other. There are two symmetrically arranged support grooves 111 and they correspond to the support columns 12 one by one. The two ends of the two support columns 12 in the same group slide in the support grooves 111 respectively. An elastic driving member is arranged on the installation column 11. The elastic driving member is a driving spring 112. The driving spring 112 corresponds to the support groove 111 one by one and is installed in the support groove 111. One end of the driving spring 112 abuts against the support column 12, and the other end abuts against the groove wall of the support groove 111 close to the connecting column 3. When in use, the driving spring 112 elastically releases and pushes the two support columns 12 in the same group to approach each other until the support columns 12 abut against the groove wall of the support groove 111 far from the connecting column 3. At this time, the two groups of support columns 12 are respectively located at positions close to the middle of the installation frame 1, and cooperate with the installation frame 1 to form an anti-falling net structure, which is used to reduce the possibility of accidents when pedestrians fall into the manhole.

[0042] See Figure 3 and Figure 4 , The installation frame 1 is provided with a driving assembly 4. When the manhole cover is lapped in the lap joint groove 21, the driving assembly 4 drives the two support columns 12 in the same group to move away from each other, reducing the possibility of garbage following the rainwater into the manhole and accumulating on the anti-falling net formed by the support columns 12.

[0043] See Figure 3 and Figure 4, the driving assembly 4 includes a driving column 41 and a driving rope 42. The connecting column 3 is provided with a driving hole 413 extending in the vertical direction. The driving columns 41 correspond to the driving holes 413 one by one and slide up and down in the driving holes 413. The driving ropes 42 correspond to the driving columns 41 one by one and slide through the connecting column 3 and the mounting column 11. One end of the driving rope 42 is fixed to the outer peripheral side of the driving column 41, and the other end passes through the driving spring 112 and is fixed to the support column 12. When the manhole cover disengages from the overlapping groove 21, the driving spring 112 pushes the support column 12 away from the connecting column 3. At this time, the driving rope 42 pulls the driving column 41 to slide upward and protrude from the driving hole 413 to a position corresponding to the overlapping groove 21. At this time, the bottom of the driving column 41 is in the same plane as the bottom of the connecting column 3. When the manhole cover covers the overlapping groove 21, since the manhole cover is made of cast iron and has a relatively heavy mass, the manhole cover presses the driving column 41, causing the driving column 41 to slide downward. Then, the driving rope 42 pulls the support column 12 closer to the connecting column 3, and at this time, the driving spring 112 is elastically compressed.

[0044] See Figure 3 and Figure 4 , an annular installation groove 25 is formed in the installation seat 2, and the installation groove 25 communicates with the connection groove 24. The installation seat 2 is provided with an installation sleeve 22, and the installation sleeve 22 is installed in the installation groove 25. The installation sleeve 22 is rotatably connected to the installation seat 2. A limiting plate 221 is arranged at the bottom of the installation sleeve 22. The limiting plate 221 has an "L" - shaped structure and corresponds to the driving columns 41 one by one. When the support column 12 moves away from the connecting column 3 and the installation sleeve 22 rotates, when the limiting plate 221 is directly below the driving column 41, the driving column 41 abuts against the limiting plate 221, and at this time, the limiting plate 221 restricts the driving column 41 from sliding downward.

[0045] See Figure 3 and Figure 4 , a pushing groove 414 extending in the vertical direction is formed in the middle of the driving column 41. The driving column 41 is provided with a pushing column 411, and the pushing column 411 slides up and down in the pushing groove 414. A power groove 415 is formed in the groove wall on the side of the pushing groove 414 away from the mounting column 11 and penetrates horizontally to the outside of the connecting column 3. The connecting column 3 is provided with a power column 412, and the power column 412 slides in the power groove 415. The top of the power column 412 is inclined to form a power surface 4121 facing the pushing column 411. When the pushing column 411 moves downward and slides on the power surface 4121, the pushing column 411 pushes the power column 412 to slide away from the mounting column 11 to the outside of the power groove 415. When the power column 412 completely slides into the power groove 415, the power column 412 protrudes into the pushing groove 414, and at this time, the pushing column 411 protrudes upward to the outside of the pushing groove 414.

[0046] See Figure 3 and Figure 4, on the side wall of the driving hole 413 away from the mounting post 11, a transmission hole 31 extending horizontally is provided. The transmission hole 31 penetrates through the outside of the connecting post 3 in the direction away from the mounting post 11, and the power post 412 can be inserted into the transmission hole 31. The connecting post 3 is provided with a transmission post 32, and the transmission post 32 slides in the transmission hole 31. When the driving post 41 abuts against the limiting plate 221, the power post 412 and the transmission post 32 are in the same straight line. The transmission post 32 is provided with a limiting member, and the limiting member is a limiting block 321. A limiting groove 311 is provided on the top hole wall of the transmission hole 31, and the limiting block 321 slides in the limiting groove 311, reducing the possibility of the transmission post 32 disengaging from the transmission hole 31. When the limiting block 321 abuts against the side wall of the limiting groove 311 close to the driving hole 413, one end of the transmission post 32 close to the driving hole 413 and the side wall of the driving hole 413 away from the mounting post 11 are in the same vertical plane, and there is a certain distance between the end of the transmission post 32 away from the driving hole 413 and the end of the connecting post 3 away from the mounting post 11. The connecting post 3 is provided with an elastic power member, and the elastic power member is a power spring 312. The power spring 312 is installed in the limiting groove 311. One end of the power spring 312 abuts against the side of the limiting block 321 away from the driving hole 413, and the other end abuts against the groove wall of the limiting groove 311. During use, the power spring 312 elastically releases, pushing the limiting block 321 to slide until it abuts against the side wall of the limiting groove 311 close to the driving hole 413.

[0047] See Figure 5 and Figure 6 , a plurality of driving blocks 222 are fixedly connected to the inner peripheral side wall of the mounting sleeve 22. In the embodiment of the present application, four driving blocks 222 are provided at an interval of ninety degrees, and the driving blocks 222 are aligned with the end face of the connecting post 3 away from the mounting post 11.

[0048] See Figure 4 and Figure 6 , the driving block 222 is inclined to form a driving surface 223 facing the transmission post 32. When the manhole cover covers the lapping groove 21, the manhole cover first pushes the pushing post 411 to slide downward. When the pushing post 411 slides downward, it pushes the power post 412 to be inserted into the transmission hole 31. At this time, the transmission post 32 protrudes out of the transmission hole 31 under the push of the power post 412, so that the transmission post 32 slides on the driving surface 223, driving the driving sleeve to rotate until the manhole cover abuts against the top of the driving post 41, and then the mounting sleeve 22 rotates until the limiting plate 221 is away from the driving hole 413, and then the driving post 41 can slide downward.

[0049] See Figure 5 and Figure 6 , the mounting seat 2 is provided with a control member. When the manhole cover is away from the driving post 41, the control member controls the directional rotation of the mounting sleeve 22, driving the limiting plate 221 (the limiting plate 221 is in Figure 2It moves to directly below the driving column 41 (marked in the figure). The control member is an elastic cord 23. There are multiple elastic cords 23, which are arranged at intervals along the circumferential direction on the outer peripheral side of the mounting sleeve 22. One end of the elastic cord 23 is fixed to the outer peripheral side of the mounting sleeve 22, and the other end is fixed to the circumferential groove wall of the mounting groove 25. When the limiting plate 221 moves away from the driving hole 413, the mounting sleeve 22 drives the elastic cord 23 into a tensioned state; when the manhole cover moves away from the driving column 41, the elastic cord 23 elastically releases, pulling the mounting sleeve 22 to rotate, so that the limiting plate 221 moves towards the driving hole 413.

[0050] See Figure 4 With Figure 6 , a receiving groove 225 is formed in the driving block 222, which penetrates through the driving block 222 towards the connecting column 3. The driving block 222 is provided with a plugging column 224, and the plugging column 224 slides in the receiving groove 225. The driving block 222 is provided with an elastic pushing member. The elastic pushing member is a pushing spring 226. The pushing spring 226 is installed in the receiving groove 225. One end of the pushing spring 226 abuts against the plugging column 224, and the other end abuts against the groove wall of the receiving groove 225 far from the notch side. When the driving column 41 abuts against the limiting plate 221, the plugging column 224 is aligned with the transmission hole 31. At this time, the pushing spring 226 elastically releases, pushing the plugging column 224 into the transmission hole 31. When one of the pushing columns 411 slides downward, the transmission column 32 first pushes the plugging column 224 out of the transmission hole 31 and then slides on the driving surface 223. However, since the other plugging columns 224 are inserted into the transmission hole 31, the mounting sleeve 22 is restricted by the other plugging columns 224. It is beneficial to reduce the possibility that when one, two or three pushing columns 411 slide downward due to misoperation, the mounting sleeve 22 can remain stationary, reducing the possibility that the support column 12 moves away from the middle position of the mounting frame 1 due to the downward sliding of the driving column 41 when preventing the fall. When the manhole cover is placed in the lapping groove 21, the manhole cover simultaneously pushes all the pushing columns 411 downward. At this time, the transmission column 32 pushes all the plugging columns 224 away from the transmission hole 31 and then slides on the driving surface 223. The mounting sleeve 22 starts to rotate, so that the limiting plate 221 moves away from the driving hole 413, and the driving column 41 can slide downward.

[0051] See Figure 3 With Figure 4 , in order to facilitate the up and down sliding of the connecting column 3 on the mounting seat 2, the top and both sides of the bottom of the plugging column 224 are respectively inclined to form a pushing surface 2241. When the connecting column 3 slides up and down, it slides on the pushing surface 2241, and can push the plugging column 224 into the receiving groove 225.

[0052] The implementation principle of a manhole anti-fall structure in an embodiment of the present application is as follows:

[0053] After the manhole cover disengages from the lapping groove 21, the driving spring 112 pushes the support column 12 to slide to a position close to the middle of the installation frame 1. At this time, the insertion column 224 is inserted into the transmission hole 31, and the support column 12 and the installation frame 1 cooperate with each other to form an anti-fall net structure, which is beneficial to reducing the possibility of safety accidents. When the manhole cover laps on the lapping groove 21, the manhole cover first simultaneously pushes all the push columns 411 to slide downward, so that the transmission column 32 pushes the insertion column 224 to disengage. Then, the transmission column 32 slides on the driving surface 223 to push the installation sleeve 22 to slide, so that the limiting plate 221 moves away from the driving hole 413, and then the driving column 41 slides downward to drive the support column 12 to slide toward the connecting column 3, which is beneficial to reducing the possibility of garbage accumulating on the waterproof net formed by the support column 12 and the installation frame 1 after flowing into the manhole with water, and is beneficial to reducing the amount of garbage accumulated on the anti-fall structure.

[0054] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A municipal manhole anti-fall structure, characterized in that: It includes an installation frame (1) and an installation seat (2) arranged on the peripheral side wall of the well. The installation frame (1) includes a plurality of oppositely arranged installation columns (11). The installation frame (1) is provided with connection columns (3) corresponding to both ends of the installation columns (11) one by one. The connection columns (3) slide up and down on the installation seat (2); Two support columns (12) are symmetrically arranged between the opposite installation columns (11). The support columns (12) are slidably connected to the installation columns (11). The installation columns (11) are provided with elastic driving members for driving the support columns (12) to approach the middle of the installation frame (1). The installation seat (2) is provided with a lapping groove (21). When a manhole cover of the installation frame (1) covers the lapping groove (21), a driving assembly (4) for driving the support columns (12) to move away from the middle of the installation frame (1) is provided; The driving assembly (4) includes a driving column (41) and a driving rope (42); An installation sleeve (22) is rotatably arranged on the installation seat (2). The installation sleeve (22) is provided with a limiting plate (221). The installation seat (2) is provided with a control member for controlling the installation sleeve (22) to rotate until the limiting plate (221) is located directly below the driving column (41) when the manhole cover moves away from the lapping groove (21). When the limiting plate (221) is located directly below the driving column (41), the driving column (41) abuts against the limiting plate (221); A pushing column (411) is slidably arranged up and down on the driving column (41). The driving column (41) slides horizontally with a power column (412) that can approach or move away from the installation sleeve (22). A power surface (4121) is inclined on one side of the power column (412) close to the pushing column (411). When the pushing column (411) slides on the power surface (4121), the power column (412) is pushed to approach the installation sleeve (22). A transmission hole (31) aligned with the power column (412) is formed horizontally in the connection column (3). The connection column (3) is provided with a transmission column (32) slidably connected to the transmission hole (31). When the driving column (41) abuts against the limiting plate (221), the transmission column (32) and the power column (412) are in the same straight line; The connection column (3) is provided with an elastic power member. The elastic power member enables the transmission column (32) to push the power column (412) to slide out of the transmission hole (31) towards the driving column (41). The driving column (41) is provided with a limiting member for limiting the transmission column (32) from protruding out of the transmission hole (31) towards the driving column (41); A plurality of driving blocks (222) corresponding to the transmission columns (32) are arranged on the inner peripheral side wall of the installation sleeve (22). The driving blocks (222) are inclined to form a driving surface (223) facing the transmission column (32). When the transmission column (32) slides on the driving surface (223), the transmission column (32) drives the installation sleeve (22) to rotate; The driving block (222) is slidably connected with a plugging column (224) capable of being inserted into the transmission hole (31), and the driving block (222) is provided with an elastic pushing member for driving the plugging column (224) to slide towards the transmission hole (31).

2. The anti-falling structure for a municipal manhole according to claim 1, characterized in that: Support grooves (111) are respectively formed on the opposite sides of the mounting column (11) facing each other. The end of the support column (12) slides in the support groove (111). The elastic driving member is a driving spring (112). The driving spring (112) is installed in the support groove (111). One end of the driving spring (112) abuts against the support column (12), and the other end abuts against the groove wall of the support groove (111) close to the mounting seat (2).

3. The anti-falling structure of a municipal manhole according to claim 2, characterized in that: The driving column (41) slides up and down on the connecting column (3). The driving rope (42) respectively slides through the connecting column (3) and the mounting frame (1). One end of the driving rope (42) is connected to the driving column (41), and the other end is connected to the support column (12). When the support column (12) approaches the middle of the mounting frame (1), the driving column (41) protrudes upward out of the connecting column (3). When the manhole cover is lapped on the lapping groove (21), the driving column (41) pulls the support column (12) away from the middle of the mounting frame (1).

4. A municipal manhole anti-fall structure according to claim 3, characterized in that: The control member is an elastic rope (23). There are multiple elastic ropes (23) which are arranged at intervals in the circumferential direction between the mounting sleeve (22) and the mounting seat (2). One end of the elastic rope (23) is connected to the outer peripheral side of the mounting sleeve (22), and the other end is connected to the mounting seat (2). When the elastic rope (23) elastically releases, it drives the mounting sleeve (22) to rotate until the limiting plate (221) abuts against the bottom of the driving column (41).

5. The anti-falling structure of a municipal manhole according to claim 3, characterized in that: The limiting member is a limiting block (321). The limiting block (321) is arranged on the outer peripheral side of the transmission column (32). A limiting groove (311) for the limiting block (321) to slide is formed on the circumferential hole wall of the transmission hole (31).

6. The anti-falling structure for a municipal manhole according to claim 5, characterized in that: The elastic power member is a power spring (312). The power spring (312) is installed in the limiting groove (311). One end of the power spring (312) abuts against the side of the limiting block (321) away from the driving column (41), and the other end abuts against the limiting groove (311).

7. A municipal manhole anti-fall structure according to claim 3, characterized in that: The elastic pushing member is a pushing spring (226). The driving block (222) is provided with a receiving groove (225) for the plugging column (224) to slide. The pushing spring (226) is installed in the receiving groove (225). One end of the pushing spring (226) abuts against the plugging column (224), and the other end abuts against the groove wall of the receiving groove (225) away from the groove opening.

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