Anti-pinch manhole cover

Abstract

The utility model relates to the technical field of manhole covers, and discloses an anti-pinch manhole cover which comprises a manhole edge, the rear portion of the manhole edge is connected with a first hinge frame, a cross arm is inserted into the first hinge frame through a rotating shaft, and a manhole cover plate is installed in the middle of the bottom of the cross arm. The side plates are welded on the left side and the right side outside the manhole cover plate; and the stand columns are arranged on the left side and the right side of the top of the bottom plate through hinge lugs, bearing bases are arranged at the top ends of the stand columns through hinge lugs, and inserting holes are formed in the middle positions of the tops of the limiting bases. According to the anti-pinch type manhole cover, the stand column is driven to move by pushing the bearing seat, so that the stand column and the bearing seat can be changed into an erected state from a horizontal folding state, the manhole cover plate cannot be closed under the blocking of the side plates and the bearing seat, and the phenomena of pinch and crashing of hands caused by cover closing in the use process of the manhole cover plate are avoided; and the use safety of the manhole cover is improved.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically an anti-pinch manhole cover. Background Technology

[0002] Manhole covers are important components widely used in various infrastructure constructions. Their main function is to cover and seal manholes to ensure the safety of underground facilities and the normal use of maintenance and inspection access.

[0003] Common manhole covers typically consist of a simple metal or composite material cover plate and a manhole edge structure. The cover plate is designed primarily to provide a planar structure that covers the manhole opening, preventing people from accidentally falling into the manhole and preventing debris from entering the manhole and affecting the normal operation of underground facilities. The manhole edge structure supports the cover plate, ensuring its stability.

[0004] However, this method involves connecting the manhole cover to the edge of the manhole via a hinged structure. While the opening and closing of the cover can be controlled after the locking structure is unlocked, the open cover relies solely on the hinge shaft for support. Consequently, during construction or routine maintenance, if workers open the manhole cover to inspect or repair underground facilities, the cover may suddenly fall due to external interference (such as wind or collisions), potentially injuring workers below or trapping their hands. This poses a serious threat to personnel safety, reduces the safety of manhole cover use, and fails to meet the operational requirements of manhole covers. Therefore, an anti-pinch manhole cover is proposed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an anti-pinch manhole cover to solve the technical problem that, since the open cover is supported only by the hinge shaft, it may suddenly fall off and injure or pinch the hands of the workers below if it is disturbed by external factors (such as wind or collisions).

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an anti-pinch manhole cover, comprising:

[0009] The manhole edge is connected to a first hinge frame at the rear. A cross arm is inserted into the interior of the first hinge frame via a pivot. A manhole cover plate is installed at the bottom center of the cross arm.

[0010] A through slot is formed on the inner front side of the cross arm. A second hinge frame is connected to the middle position of the front part of the manhole edge. A screw is inserted into the interior of the second hinge frame through a rotating shaft. The upper part of the screw is engaged in the interior of the through slot. A limit cap is screwed onto the top of the screw.

[0011] Side plates are welded to the outer left and right sides of the manhole cover. Snap-fit ​​seats are installed on the outer left and right sides of the manhole edge, corresponding to the positions of the side plates. Assembly brackets are connected to the outer sides of each snap-fit ​​seat, and a base plate is inserted into the interior of each assembly bracket.

[0012] The columns are mounted on the top left and right sides of the base plate via hinged lugs. Each column has a support seat mounted on its top via hinged lugs, and a mounting bracket is installed on the bottom front side of the support seat.

[0013] A limiting seat is fitted onto the outside of the front column. The front side of the limiting seat is equipped with an arc-shaped end face. A handle is inserted inside the fitting. Springs are inserted on both the left and right sides inside the handle. A pin is connected to the bottom end of the handle. An insertion hole is opened at the top center of the limiting seat.

[0014] Preferably, an annular washer is installed at the top of the manhole edge, and rubber washers are snapped into the bottom outer side of the manhole cover at positions corresponding to the annular washer. The added annular washer and rubber washers make the manhole cover and the manhole edge more tightly closed when the cover is closed.

[0015] Preferably, the assembly frame and the base plate have screw holes on both the left and right sides inside, and the number of screw holes is 2-6 sets. Each screw hole is screwed with a bolt, which facilitates the disassembly and assembly of the base plate.

[0016] Preferably, the top of each spring is connected to the corresponding position of the top of the inner cavity of the assembly, the handle is L-shaped, and a bushing is installed on the outer left side of the assembly.

[0017] Preferably, a limiting pin is inserted inside the bushing, a lever is installed at the left end of the limiting pin, and a rubber sleeve is fitted around the limiting pin.

[0018] Preferably, the lower inner side of both the assembly and the handle is provided with a limiting hole. The diameter of the limiting hole is adapted to the diameter of the limiting pin. After the column and the support are erected, the limiting pin can be pulled out from the inside of the bushing and inserted into the inside of the limiting hole, so that the column and the support can be locked and the column and the support can always be stably kept in an erected state.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, this utility model provides an anti-pinch manhole cover, which has the following beneficial effects:

[0021] This anti-pinch manhole cover loosens by rotating the limiting cap, allowing the screw to be pulled out from the through slot and the manhole cover to open. Once open, the support seat moves, causing the column to move. When the pin reaches the curved end face, it is compressed and, with the help of a spring, inserts into the insertion hole. This allows the column and support seat to change from a horizontal folded state to an upright state. During use, if the manhole cover is closed downwards or tilted, the support seat limits the side plates of the manhole cover, preventing it from closing completely. This avoids pinching and injury from the manhole cover during use, improving the safety of the manhole cover. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the working structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the assembly structure of the assembly frame and base plate of this utility model;

[0025] Figure 4 This is a schematic diagram of the unfolded structure of the column and support base of this utility model;

[0026] Figure 5 This is a schematic cross-sectional view of the assembly of this utility model;

[0027] Figure 6 This is a schematic diagram of the limiting seat structure of this utility model.

[0028] In the diagram: 1. Manhole edge; 2. First hinge frame; 3. Cross arm; 31. Through slot; 4. Manhole cover; 5. Annular washer; 6. Second hinge frame; 7. Screw; 8. Limit cap; 9. Side plate; 10. Snap-fit ​​seat; 11. Assembly frame; 111. Screw hole; 112. Bolt; 12. Base plate; 13. Column; 14. Support seat; 15. Assembly kit; 16. Handle; 17. Limit seat; 171. Arc-shaped end face; 18. Spring; 19. Pin; 20. Bushing; 21. Limit pin; 22. Limit hole; 23. Insertion hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] This utility model provides a technical solution: an anti-pinch manhole cover, comprising a manhole edge 1, a first hinge frame 2, a cross arm 3, a through groove 31, a manhole cover plate 4, an annular washer 5, a second hinge frame 6, a screw 7, a limit cap 8, a side plate 9, a snap-fit ​​seat 10, an assembly frame 11, screw holes 111, bolts 112, a base plate 12, a column 13, a support seat 14, an assembly kit 15, a handle 16, a limit seat 17, an arc-shaped end face 171, a spring 18, a pin 19, a bushing 20, a limit pin 21, a limit hole 22, and an insertion hole 23.

[0031] Please see Figure 1 A first hinge frame 2 is connected to the rear of the manhole edge 1. A cross arm 3 is inserted into the interior of the first hinge frame 2 via a pivot. A manhole cover plate 4 is installed at the bottom center of the cross arm 3. Please refer to [link / reference]. Figure 2 A ring-shaped washer 5 is installed at the top of the manhole edge 1, and rubber washers are snapped onto the bottom outer side of the manhole cover plate 4 at positions corresponding to the ring-shaped washer 5.

[0032] Please see Figure 1 The through slot 31 is located inside the front side of the cross arm 3. A second hinge bracket 6 is connected to the middle of the front part of the manhole edge 1. Please refer to [link / reference]. Figure 2 The second hinge frame 6 has a screw 7 inserted inside via a rotating shaft. The upper part of the screw 7 is engaged inside the through groove 31, and the top of the screw 7 is screwed with a limit cap 8.

[0033] Please see Figure 1 Side plates 9 are welded to the outer left and right sides of the manhole cover 4. Please refer to [link / reference]. Figure 2 The outer left and right sides of the manhole edge 1 are fitted with snap-fit ​​seats 10 at positions corresponding to the side plate 9. Please refer to [link / reference]. Figure 3 The outer side of the card holder 10 is connected to the assembly frame 11. The base plate 12 is inserted inside the assembly frame 11. The left and right sides of the assembly frame 11 and the base plate 12 are provided with screw holes 111. The number of screw holes 111 is 2-6 sets. The screw holes 111 are screwed with bolts 112.

[0034] Please see Figure 4 and Figure 5The column 13 is mounted on the top left and right sides of the base plate 12 via hinge ears. The top of the column 13 is equipped with a support 14 via hinge ears. The bottom front side of the support 14 is equipped with a fitting 15.

[0035] The limiting seat 17 is fitted onto the outside of the front upright 13. Please refer to [link / reference]. Figure 6 The front side of the limiting seat 17 is equipped with an arc-shaped end face 171, please refer to Figure 5 The assembly 15 has a handle 16 inserted inside, and springs 18 are inserted on both the left and right sides inside the handle 16. A pin 19 is connected to the bottom end of the handle 16. Please refer to [link / reference]. Figure 6 The top center of the limiting seat 17 has an insertion hole 23. Please refer to [link / reference]. Figure 5 The top of each spring 18 is connected to the corresponding position on the top of the inner cavity of the fitting 15. By rotating the limiting cap 8, it is loosened, allowing the screw 7 to be pulled out from the through groove 31, thereby opening the manhole cover 4. After the manhole cover 4 is opened, it pushes the support 14 to move the column 13, so that when the pin 19 moves to the arc-shaped end face 171, it is squeezed, and when it continues to move to the insertion hole 23, the pin 19 is driven to insert into the insertion hole 23 with the cooperation of the spring 18, thereby allowing the column to... The column 13 and the support 14 change from a horizontally folded state to an upright state. This ensures that when the manhole cover 4 is closed or tilted downwards during use, the support 14 and the column 13 limit the side plates 9 of the manhole cover 4, preventing it from closing completely. This avoids hand pinching and injury during use, improving the safety of the manhole cover. The handle 16 is L-shaped. Please refer to [link / reference]. Figure 4 A bushing 20 is installed on the outer left side of the fitting 15, and a limiting pin 21 is inserted inside the bushing 20. Please refer to [link / reference]. Figure 5 A lever is installed at the left end of the limiting pin 21, and a rubber sleeve is fitted on the outside of the limiting pin 21. Limiting holes 22 are opened on the lower inside of the fitting 15 and the handle 16. The diameter of the limiting hole 22 is matched with the diameter of the limiting pin 21. When the manhole cover 4 needs to be sealed, the limiting pin 21 can be pulled out from the limiting hole 22, and then the handle 16 can be pressed to pull the pin 19 out from the insertion hole 23. Then the support 14 can be pulled, so that the support 14 and the column 13 are folded. Since the folded support 14 is lower than the top end face of the manhole edge 1, the manhole cover 4 can be closed normally.

[0036] This design loosens the rotating limit cap 8, allowing the screw 7 to be pulled out from the through slot 31, thus opening the manhole cover 4. After the manhole cover 4 is opened, it pushes the support 14, causing the column 13 to move. When the pin 19 moves to the arc-shaped end face 171, it is squeezed. When it continues to move to the insertion hole 23, the spring 18 helps the pin 19 to insert into the insertion hole 23. This allows the column 13 and the support 14 to change from a horizontally folded state to an upright state. During the use of the manhole cover 4, if it is closed downwards or tilted, the support of the column 13 and the support 14 will limit the side plates 9 on both sides of the manhole cover 4, preventing the manhole cover 4 from closing. This avoids the phenomenon of pinching and crushing hands when the manhole cover 4 is closed during use, thus improving the safety of the manhole cover.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manhole cover designed to prevent hand pinching, characterized in that, include: Manhole edge (1), the rear part of the manhole edge (1) is connected to a first hinge frame (2), the inside of the first hinge frame (2) is fitted with a cross arm (3) through a pivot, and a manhole cover plate (4) is installed at the bottom middle position of the cross arm (3); A through groove (31) is opened on the front side inside the cross arm (3). A second hinge frame (6) is connected to the middle position of the front part of the manhole edge (1). A screw (7) is inserted into the interior of the second hinge frame (6) through a rotating shaft. The upper part of the screw (7) is engaged in the interior of the through groove (31). A limit cap (8) is screwed onto the top of the screw (7). Side plates (9) are welded to the left and right sides of the outside of the manhole cover (4). The left and right sides of the outside of the manhole edge (1) are equipped with snap-fit ​​seats (10) corresponding to the side plates (9). The snap-fit ​​seats (10) are connected to the outer side of the snap-fit ​​seats (11). The bottom plate (12) is inserted inside the assembly frame (11). The column (13) is mounted on the top left and right sides of the base plate (12) via hinge ears. The top of the column (13) is equipped with a support (14) via hinge ears. The bottom front side of the support (14) is equipped with a fitting (15). A limiting seat (17) is sleeved on the outside of the front column (13). The front side of the limiting seat (17) is equipped with an arc-shaped end face (171). A handle (16) is inserted inside the fitting (15). Springs (18) are inserted on both the left and right sides inside the handle (16). A pin (19) is connected to the bottom end of the handle (16). A hole (23) is opened in the middle of the top of the limiting seat (17).

2. The anti-pinch manhole cover according to claim 1, characterized in that: The top of the manhole edge (1) is equipped with an annular washer (5), and rubber washers are snapped into the bottom outer side of the manhole cover (4) at positions corresponding to the annular washer (5).

3. The anti-pinch manhole cover according to claim 1, characterized in that: The assembly frame (11) and the base plate (12) are provided with screw holes (111) on both the left and right sides. There are 2-6 sets of screw holes (111), and each screw hole (111) is screwed with a bolt (112).

4. The anti-pinch manhole cover according to claim 1, characterized in that: The top of each spring (18) is connected to the corresponding position of the top of the inner cavity of the fitting (15). The handle (16) is L-shaped. A bushing (20) is installed on the outer left side of the fitting (15).

5. A hand-pinch resistant manhole cover according to claim 4, characterized in that: A limiting pin (21) is inserted inside the bushing (20), a lever is installed at the left end of the limiting pin (21), and a rubber sleeve is fitted on the outside of the limiting pin (21).

6. A hand-pinch resistant manhole cover according to claim 5, characterized in that: Both the accessory (15) and the grip (16) have a limiting hole (22) on their lower inner sides, and the diameter of the limiting hole (22) is adapted to the diameter of the limiting pin (21).

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