Well lid warning device for municipal road maintenance

Abstract

The utility model relates to the technical field of road maintenance, and discloses a well lid warning device for municipal road maintenance, a warning board is fixedly installed on the surface of a handrail, a cross rod is movably installed at the bottom of the handrail, supporting legs are fixedly installed at the two ends of the cross rod, a first nut is fixedly installed at the bottom of the cross rod, and a second nut is fixedly installed at the bottom of the first nut. The interior of the first nut is in threaded connection with a screw rod, and the bottom of the screw rod is movably provided with an auxiliary leg. The supporting legs are rotated by applying force, the transverse rods, the rotating shafts and the limiting rings rotate synchronously, the rotating shafts drive the clamping heads to rotate, and the clamping heads are separated from the clamping grooves in the vertical position. When the supporting legs are parallel to the handrail, the springs push the clamping heads to be inserted into the clamping grooves in the horizontal position, then the rotating shafts are locked again, in the process, the directions of the supporting legs and the handrail are adjusted, it is guaranteed that when the handrail is placed, the occupied space is small, and placement cannot be affected by protruding of the supporting legs.

Description

Technical Field

[0001] This utility model relates to the field of road maintenance technology, specifically to a manhole cover warning device for municipal road maintenance. Background Technology

[0002] After prolonged use, manhole covers may develop cracks or dents. In such cases, the manhole covers should be replaced promptly, and warning signs should be installed to prevent pedestrians or vehicles from accidentally falling in. Common warning devices include submarines with warning tape, fences with netting, and railings with warning signs.

[0003] Warning signs are usually fixed on both sides of the railing. The bottom supports of the railing are arranged in a cross shape with the railing body. When moving multiple warning railings, their bottom supports must be staggered so that the multiple railing bodies can be brought closer together. Because the bottom supports are set horizontally and vertically with the railing body, the railing bodies take up a lot of space when being moved and stacked. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a manhole cover warning device for municipal road maintenance, which has the advantage of changing the direction of the bottom support legs, making the placement of the guardrail less space-consuming, thus solving the above-mentioned problems.

[0006] (II) Technical Solution

[0007] To achieve the goal of changing the direction of the bottom support legs and minimizing the space occupied by the railing, this utility model provides the following technical solution: a manhole cover warning device for municipal road maintenance, including a railing, a warning sign fixedly installed on the surface of the railing, a crossbar movably installed at the bottom of the railing, support legs fixedly installed at both ends of the crossbar, a nut fixedly installed at the bottom of the crossbar, a screw threadedly connected to the inside of the nut, a deep hole corresponding to the screw opening inside the crossbar, and an auxiliary leg movably installed at the bottom of the screw.

[0008] Preferably, a rotating shaft is fixedly installed at the top of the crossbar, and two symmetrically arranged limiting rings are fixedly installed on the outer side of the rotating shaft, with a fixing sleeve between the two limiting rings.

[0009] Preferably, mounting grooves are provided on both sides of the rotating shaft, and a spring is provided inside the mounting groove. A limit plate is provided at one end of the spring, and a clamping head is fixedly installed on the side of the limit plate. The clamping head is inserted into the limit ring, and the limit ring is fixedly installed at the opening of the mounting groove. The inner wall of the fixing sleeve has a slot corresponding to the clamping head. There are four slots, which are arranged in a ring with equal spacing.

[0010] Preferably, a second nut is fixedly installed on the outer wall of the railing, and a bolt is connected to the internal thread of the second nut. The outer wall of the fixing sleeve has a threaded groove corresponding to the bolt. The fixing sleeve is detachably installed to the railing through the second nut, the bolt and the threaded groove.

[0011] Preferably, the end of the card head inserted into the card slot is hemispherical, and the rotating shaft is engaged with the fixing sleeve through the card head and the card slot.

[0012] Preferably, warning tape is interspersed around the inside of the railing.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a manhole cover warning device for municipal road maintenance, which has the following beneficial effects:

[0015] 1. This manhole cover warning device for municipal road maintenance works by applying force to rotate the outriggers, in which the crossbar, pivot, and limit ring rotate synchronously. The pivot drives the locking head to rotate, and the locking head separates from the vertical locking slot. When the outriggers are parallel to the railing, the spring pushes the locking head into the horizontal locking slot, and then locks the pivot again. In this process, the direction of the outriggers and the railing is adjusted, ensuring that the railing occupies little space when placed and that the placement is not affected by the outriggers protruding.

[0016] 2. The manhole cover warning device used for municipal road maintenance allows the bolts to be loosened, causing them to separate from the threaded grooves. This enables the removal of the fixing sleeve and the entire support leg. By rotating the screw, the auxiliary leg also moves down, increasing the overall balance of the guardrail. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is an exploded structural diagram of the railing, crossbar, and auxiliary legs of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the railing, crossbar, and auxiliary legs of this utility model;

[0020] Figure 4 This is an exploded structural diagram of the rotating shaft, fixing sleeve, and clamp of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the rotating shaft, fixing sleeve, and clamp of this utility model.

[0022] In the diagram: 1. Guardrail; 2. Warning sign; 3. Crossbar; 4. Support leg; 5. Nut 1; 6. Screw; 7. Auxiliary leg; 8. Shaft; 9. Limit ring; 10. Fixing sleeve; 11. Mounting groove; 12. Spring; 13. Limit plate; 14. Clip; 15. Limit ring; 16. Slot; 17. Nut 2; 18. Bolt; 19. Threaded groove; 20. Warning tape. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 A manhole cover warning device for municipal road maintenance includes a railing 1, a warning sign 2 fixedly installed on the surface of the railing 1, the warning sign 2 marked with words such as "manhole cover maintenance" and "slow down and avoid"; a crossbar 3 is movably installed at the bottom of the railing 1, and support legs 4 are fixedly installed at both ends of the crossbar 3. At this time, the crossbar 3 and the support legs 4 are set perpendicular to the railing 1 in a cross shape, so that the railing 1 can be used standing up.

[0025] A nut 5 is fixedly installed at the bottom of the crossbar 3. A screw rod 6 is connected to the internal thread of the nut 5. A deep hole corresponding to the screw rod 6 is opened inside the crossbar 3. An auxiliary leg 7 is movably installed at the bottom of the screw rod 6. When the screw rod 6 is rotated, the auxiliary leg 7 will also contact the ground. Conventional railings are only supported by two legs of the support leg 4, resulting in a small contact area with the ground (two legs). This application sets an auxiliary leg 7 in the middle of the support leg 4, which increases the contact area with the ground (three legs), thereby ensuring the stable placement of the entire railing 1.

[0026] A rotating shaft 8 is fixedly installed at the top of the crossbar 3. Two symmetrically arranged limiting rings 9 are fixedly installed on the outer side of the rotating shaft 8, and a fixing sleeve 10 is provided between the two limiting rings 9. The fixing sleeve 10 is movably connected to the outer side of the rotating shaft 8. A second nut 17 is fixedly installed on the outer wall of the railing 1. A bolt 18 is connected to the internal thread of the second nut 17. The outer wall of the fixing sleeve 10 has a threaded groove 19 corresponding to the bolt 18. The fixing sleeve 10 is detachably installed to the railing 1 through the second nut 17, the bolt 18, and the threaded groove 19. By tightening the drive bolt 18, the bolt 18 is inserted into the threaded groove 19, and the entire fixing sleeve 10 is fixedly installed in the tube wall of the railing 1.

[0027] Both sides of the rotating shaft 8 are provided with mounting grooves 11. A spring 12 is installed inside the mounting groove 11. A limit plate 13 is provided at one end of the spring 12. A clamp 14 is fixedly installed on the side of the limit plate 13. The spring 12 can push the clamp 14 to extend outward. The clamp 14 is inserted into the limit ring 15. The limit ring 15 is fixedly installed at the opening of the mounting groove 11. The inner wall of the fixing sleeve 10 is provided with a groove 16 corresponding to the clamp 14. There are four grooves 16, which are arranged in a ring with equal spacing. The grooves 16 will form a vertical position and a horizontal position relative to the railing 1. The end of the clamp 14 inserted into the groove 16 is hemispherical. The rotating shaft 8 is engaged with the fixing sleeve 10 through the clamp 14 and the groove 16.

[0028] The outer side of railing 1 has reflective strips to enhance its warning effect. Warning tape 20, a prior art technique, is interwoven with the vertical bars of railing 1. When two or more railings 1 surround a manhole cover, the warning tape 20 can be pulled out and hung on adjacent railings 1, thus ensuring that gaps between multiple railings 1 prevent pedestrians from passing through. Reflective strips are also affixed to the manhole cover or its base to further enhance its warning effect.

[0029] Working principle: When in use, by applying force to rotate the support leg 4, the crossbar 3, the rotating shaft 8 and the limiting ring 9 rotate synchronously. The rotating shaft 8 drives the locking head 14 to rotate, and the locking head 14 separates from the locking groove 16 in the vertical position.

[0030] When the support leg 4 is parallel to the railing 1, the spring 12 will push the locking head 14 into the horizontal locking slot 16, and then lock the rotating shaft 8 again. During this process, the direction of the support leg 4 and the railing 1 is adjusted to ensure that the railing 1 occupies little space when placed and will not be affected by the protrusion of the support leg 4.

[0031] By loosening bolt 18, bolt 18 separates from threaded groove 19, allowing the fixing sleeve 10 to be disassembled, and the entire support leg 4 to be removed; by rotating screw 6, the auxiliary leg 7 also moves down, increasing the balance of the entire railing 1.

[0032] 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 warning device for municipal road maintenance, comprising a railing (1), a warning sign (2) fixedly installed on the surface of the railing (1), a crossbar (3) movably installed at the bottom of the railing (1), support legs (4) fixedly installed at both ends of the crossbar (3), a nut (5) fixedly installed at the bottom of the crossbar (3), a screw (6) threadedly connected to the inside of the nut (5), a deep hole corresponding to the screw (6) being opened inside the crossbar (3), and an auxiliary leg (7) movably installed at the bottom of the screw (6), characterized in that: A rotating shaft (8) is fixedly installed on the top of the crossbar (3), and two symmetrically arranged limiting rings (9) are fixedly installed on the outside of the rotating shaft (8), with a fixing sleeve (10) between the two limiting rings (9).

2. The manhole cover warning device for municipal road maintenance according to claim 1, characterized in that: The rotating shaft (8) has mounting grooves (11) on both sides. A spring (12) is installed inside the mounting groove (11). A limiting plate (13) is installed at one end of the spring (12). A clip (14) is fixedly installed on the side of the limiting plate (13). The clip (14) is inserted into the limiting ring (15). The limiting ring (15) is fixedly installed at the opening of the mounting groove (11). The inner wall of the fixing sleeve (10) has a slot (16) corresponding to the clip (14). There are four slots (16) arranged in a ring with equal spacing.

3. The manhole cover warning device for municipal road maintenance according to claim 1, characterized in that: Nut 2 (17) is fixedly installed on the outer wall of the railing (1). The inner thread of nut 2 (17) is connected to bolt (18). The outer wall of the fixing sleeve (10) is provided with a thread groove (19) corresponding to bolt (18). The fixing sleeve (10) is detachably installed with the railing (1) through nut 2 (17), bolt (18) and thread groove (19).

4. A manhole cover warning device for municipal road maintenance according to claim 2, characterized in that: The end of the card head (14) inserted into the card slot (16) is hemispherical, and the rotating shaft (8) is engaged with the fixing sleeve (10) through the card head (14) and the card slot (16).

5. A manhole cover warning device for municipal road maintenance according to claim 1, characterized in that: Warning tape (20) is interwoven around the inside of the railing (1).

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