Wharf boarding ladder convenient to fold

Abstract

The utility model discloses a wharf boarding ladder convenient to fold, and relates to the technical field of wharf boarding ladders, the wharf boarding ladder comprises a ship ladder, one end of the ship ladder is provided with a self-locking hinge, the surface of the ship ladder is provided with a guardrail, the self-locking hinge comprises a locking rotating head, a locking main arm rod, a locking strip and a cross beam, the two ends of the cross beam are fixedly connected with the locking main arm rods respectively. The ship ladder is clamped in the positioning clamping groove in the locking main arm rod from the small rivet in the flat opening state, at the moment, the ship ladder at the upper end cannot be folded and can only be folded from the ship ladder at the lower end, when the ship ladder at the lower end is rotated, the rotating ship ladder drives the locking rotating tail to rotate along with the ship ladder, and then the locking strip is driven to push upwards; the small rivets, clamped and locked in the positioning clamping grooves in the locking main arm rods, at the upper ends of the locking strips are pushed out of the positioning clamping grooves, so that the ship ladder at the upper end can be rotationally folded, the hinge self-locking function can be achieved, and the ship ladder is more flexible and convenient to fold, store and unfold.

Description

Technical Field

[0001] This utility model relates to the field of dock boarding ladder technology, specifically to a dock boarding ladder that is easy to fold. Background Technology

[0002] In engineering vessels or similar vessels with vertical bulwarks, gangways are required on both sides of the hull to facilitate operations for crew members and communication between the vessel and the outside environment. Existing gangways are not removable or foldable, so when a vessel approaches a service vessel or dock, the entire gangway must be disassembled, a cumbersome process requiring specialized personnel. Furthermore, the materials used in existing gangways are not suitable for disassembly and folding. To address the issue of unauthorized personnel boarding the vessel and to protect the safety of personnel and cargo on board, improvements to existing gangways are necessary. Therefore, a foldable dockside gangway needs to be invented. Utility Model Content

[0003] The purpose of this invention is to provide a foldable dock boarding ladder to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A foldable dock boarding ladder includes a boat ladder, one end of which is equipped with a self-locking hinge, and the surface of the boat ladder is equipped with a guardrail.

[0006] The self-locking hinge includes a locking rotating head, a locking main boom, a locking strip, and a crossbeam. The two ends of the crossbeam are respectively fixedly connected to the locking main boom. The upper end of the locking main boom is respectively provided with a second movable groove, a positioning slot, and a positioning groove. The locking rotating head is provided on the upper inner side of the locking main boom, and the locking strip is provided on the outer side of the locking main boom.

[0007] A further improvement of this utility model is that: a U-shaped groove is provided at the lower end of the locking rotating head; a first movable groove is provided at the upper end of the locking strip, and a through hole is provided at the lower end of the locking strip; the U-shaped groove, the second movable groove, and the first movable groove are connected to each other by a large rivet; and the upper end of the locking rotating head is fixedly connected to the boat ladder; in the open state, the small rivet is stuck in the positioning slot on the locking main arm rod, and the boat ladder at the upper end cannot be folded at this time.

[0008] A further improvement of this utility model is that: a small rivet is fixedly connected to the upper end of the locking rotating head, and the small rivet is engaged with the positioning groove; two positioning grooves are respectively provided at the lower end of the locking main arm, and a through hole is provided at the lower end of the locking bar. Another large rivet is rotatably connected in the through hole, and the middle part of the large rivet is engaged with the positioning groove. The innermost side of the large rivet is rotatably connected to the locking rotating tail, and the upper end of the locking rotating tail is rotatably connected to the locking main arm. It can be folded from the lower end of the boat ladder. When the lower end of the boat ladder is rotated, the rotating boat ladder drives the locking rotating tail to rotate, thereby driving the locking bar to push upward.

[0009] A further improvement of the present invention is that the guardrail includes a hinge block fixedly connected to the surface of the boat ladder, and a first support column is threadedly connected to the surface of the hinge block. The surface of the first support column is provided with a threaded hole. By rotating the fixing bolt, the fixing bolt is disengaged from the first support column and the second support column, and then the second support column is pulled.

[0010] A further improvement of this utility model is that: a fixing bolt is threaded through the surface of the threaded hole, and a second support column is movably connected inside the threaded hole. The second support column moves inside the first support column 21 and is adjusted to a suitable position.

[0011] A further improvement of this utility model is that the second support column and the first support column are connected by a fixing bolt threaded together. A guard plate is fixedly connected to the top of the second support column. By rotating the fixing bolt, the fixing bolt fixes the first support column and the second support column, thereby allowing for flexible height adjustment of the guardrail.

[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0013] 1. This utility model provides a dock boarding ladder that is easy to fold. In the open state, small rivets are locked in the positioning slots on the locking main arm. At this time, the upper ladder cannot be folded, and can only be folded from the lower ladder. When the lower ladder is rotated, the rotating ladder drives the locking rotating tail to rotate, which in turn drives the locking bar to push upward until the small rivets locked in the positioning slots on the locking main arm at the upper end of the locking bar are pushed out of the positioning slots, so that the upper ladder can be rotated and folded, thereby achieving the hinge self-locking function, making the ladder more flexible and convenient to fold, store and unfold.

[0014] 2. This utility model provides a foldable dock boarding ladder. By rotating the fixing bolt, the fixing bolt is disengaged from the first support column and the second support column. Then, the second support column is pulled, and the second support column moves inside the first support column to adjust to a suitable position. When it moves to the suitable position, the fixing bolt is rotated, and the fixing bolt fixes the first support column and the second support column. This allows for flexible height adjustment of the railing, thus providing flexible protection for passengers going up and down the boarding ladder when it is unfolded. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the self-locking hinge of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the first movable groove of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the guardrail of this utility model.

[0019] In the diagram: 1. Boat ladder; 2. Guardrail; 20. Hinge block; 21. First support column; 22. Threaded hole; 23. Fixing bolt; 24. Second support column; 25. Guard plate; 3. Self-locking hinge; 30. Locking rotating head; 31. Crossbeam; 32. Locking main boom; 33. Locking strip; 331. First movable groove; 34. Locking rotating tail; 35. Small rivet; 36. Large rivet; 321. Second movable groove; 323. Positioning groove; 324. Positioning slot; 301. U-shaped groove. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to embodiments:

[0021] Example 1

[0022] like Figure 1-4As shown, this utility model provides a foldable dock boarding ladder, including a ladder 1. A self-locking hinge 3 is installed at one end of the ladder 1, and a guardrail 2 is installed on the surface of the ladder 1. The self-locking hinge 3 includes a locking rotating head 30, a locking main arm 32, a locking strip 33, and a crossbeam 31. The two ends of the crossbeam 31 are respectively fixedly connected to the locking main arm 32. The upper end of the locking main arm 32 is respectively provided with a second movable groove 321, a positioning slot 324, and a positioning groove 323. A locking rotating head 30 is provided on the upper inner side of the locking main arm 32, and a locking strip 33 is provided on the outer side of the locking main arm 32. A U-shaped groove 301 is provided at the lower end of the locking rotating head 30; the upper end of the locking strip 33 is provided with... The first movable groove 331 has a through hole at the lower end of the locking strip 33. The U-shaped groove 301, the second movable groove 321, and the first movable groove 331 are connected to each other by a large rivet 36. The upper end of the locking rotating head 30 is fixedly connected to the boat ladder 1, and the upper end of the locking rotating head 30 is fixedly connected to a small rivet 35. The small rivet 35 is engaged with the positioning slot 324. The lower end of the locking main boom 32 is provided with two positioning grooves 323. The lower end of the locking strip 33 has a through hole. Another large rivet 36 is rotatably connected inside the through hole. The middle part of the large rivet 36 is engaged with the positioning groove 323. The innermost side of the large rivet 36 is rotatably connected to the locking rotating tail 34. The upper end of the locking rotating tail 34 is rotatably connected to the locking main boom 32.

[0023] Specifically, in the open state, the small rivet 35 is engaged in the positioning slot 324 on the locking main boom 32. At this time, the upper boat ladder 1 cannot be folded, but can only be folded from the lower boat ladder 1. When the lower boat ladder 1 is rotated, the rotating boat ladder 1 drives the locking rotating tail 34 to rotate and thus drives the locking bar 33 to push upward until the small rivet 35 engaged in the positioning slot 324 on the locking main boom 32 is pushed out of the positioning slot 324, so that the upper boat ladder 1 can be rotated and folded.

[0024] Example 2

[0025] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the guardrail 2 includes a hinge block 20 fixedly connected to the surface of the boat ladder 1, a first support column 21 threadedly connected to the surface of the hinge block 20, a threaded hole 22 opened on the surface of the first support column 21, a fixing bolt 23 threadedly connected through the surface of the threaded hole 22, a second support column 24 movably connected inside the threaded hole 22, the second support column 24 and the first support column 21 being threadedly connected by the fixing bolt 23, and a guard plate 25 fixedly connected to the top of the second support column 24;

[0026] Specifically, by rotating the fixing bolt 23, the fixing bolt 23 is disengaged from the first support column 21 and the second support column 24. Then, the second support column 24 is pulled, and the second support column 24 moves inside the first support column 21 to adjust to a suitable position. When it moves to the suitable position, the fixing bolt 23 is rotated, and the fixing bolt 23 fixes the first support column 21 and the second support column 24, thereby allowing for flexible height adjustment of the guardrail 2.

[0027] The working principle of this foldable dock boarding ladder will be explained in detail below.

[0028] like Figure 1-4 As shown, in the open state, the small rivet 35 is engaged in the positioning slot 324 on the locking main boom 32. At this time, the upper boat ladder 1 cannot be folded, but can only be folded from the lower boat ladder 1. When the lower boat ladder 1 is rotated, the rotating boat ladder 1 drives the locking rotating tail 34 to rotate, which in turn drives the locking bar 33 to push upward until the small rivet 35 engaged in the positioning slot 324 on the locking main boom 32 is pushed out of the positioning slot 324, so that the upper boat ladder 1 can be rotated and folded. By rotating the fixing bolt 23, the fixing bolt 23 is disengaged from the first support column 21 and the second support column 24. Then, the second support column 24 is pulled, and the second support column 24 moves inside the first support column 21 to adjust to a suitable position. When it moves to the suitable position, the fixing bolt 23 is rotated, and the fixing bolt 23 fixes the first support column 21 and the second support column 24, so that the height of the guardrail 2 can be flexibly adjusted.

[0029] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A foldable dock boarding ladder, comprising a boat ladder (1), characterized in that: A self-locking hinge (3) is installed at one end of the boat ladder (1), and a guardrail (2) is installed on the surface of the boat ladder (1); The self-locking hinge (3) includes a locking rotating head (30), a locking main arm (32), a locking strip (33), and a crossbeam (31). The two ends of the crossbeam (31) are fixedly connected to the locking main arm (32). The upper end of the locking main arm (32) is provided with a second movable groove (321), a positioning slot (324), and a positioning groove (323). The upper inner side of the locking main arm (32) is provided with a locking rotating head (30), and the outer side of the locking main arm (32) is provided with a locking strip (33).

2. The foldable dock boarding ladder according to claim 1, characterized in that: The lower end of the locking rotating head (30) is provided with a U-shaped groove (301); the upper end of the locking strip (33) is provided with a first movable groove (331), the lower end of the locking strip (33) is provided with a through hole, the U-shaped groove (301), the second movable groove (321) and the first movable groove (331) are connected to each other by a large rivet (36), and the upper end of the locking rotating head (30) is fixedly connected to the boat ladder (1).

3. A foldable dock boarding ladder according to claim 2, characterized in that: The upper end of the locking rotating head (30) is fixedly connected to a small rivet (35), which is engaged with the positioning slot (324). The lower end of the locking main arm (32) is provided with two positioning grooves (323), and the lower end of the locking strip (33) is provided with a through hole. Another large rivet (36) is rotatably connected in the through hole. The middle part of the large rivet (36) is engaged with the positioning groove (323). The innermost side of the large rivet (36) is rotatably connected to the locking rotating tail (34), and the upper end of the locking rotating tail (34) is rotatably connected to the locking main arm (32).

4. A foldable dock boarding ladder according to claim 1, characterized in that: The guardrail (2) includes a hinge block (20) fixedly connected to the surface of the ladder (1). The surface of the hinge block (20) is threadedly connected to a first support column (21), and the surface of the first support column (21) is provided with a threaded hole (22).

5. A foldable dock boarding ladder according to claim 4, characterized in that: The surface of the threaded hole (22) is threaded with a fixing bolt (23), and the interior of the threaded hole (22) is movably connected with a second support column (24).

6. A foldable dock boarding ladder according to claim 5, characterized in that: The second support column (24) is threadedly connected to the first support column (21) by a fixing bolt (23), and a protective plate (25) is fixedly connected to the top of the second support column (24).

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