Ship section ladder and its use method

Abstract

The application relates to the ship manufacturing technical field, and particularly discloses a ship section up-down ladder and a using method thereof, which comprises a ladder and a hook assembly. The ladder comprises mutually parallel inner rods and outer rods, a plurality of footboards are arranged between the inner rods and the outer rods, the top ends of the inner rods and the outer rods are rotationally connected with horizontal cross rods, the inner rods and the outer rods are arranged on the two sides of vertical vertical rods, and the hook assembly is rotationally arranged on the inner rods. The hook assembly can hang the ladder on a mesh plate. The inner rods and the outer rods of the ladder are rotationally connected with the horizontal cross rods of a scaffold, the ladder can be put down or folded by rotation during transportation or transfer, the hook assembly is arranged, the ladder can be hung on the mesh plate, the ladder does not need to be tightly fixed by iron wire during transportation, the top end of the ladder is rotationally connected with the horizontal cross rod, the setting direction of the ladder is consistent with the direction of the mesh plate, and the space occupied by the ship section is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a ship segmented ladder and a use method thereof. Background Art

[0002] Large and medium-sized ships are constructed from a large number of ship sections. In the later stages of ship section construction, when the sections are separated from the cradles, they need to be transported multiple times by ship section transport vehicles according to the construction process requirements. Once transported to their destination, the corresponding construction work can be carried out. To this end, the scaffolding used for construction on the ship sections is fixed to the ship sections and transported as a whole along with the ship sections, reducing the number of scaffolding erection and dismantling operations and improving construction efficiency. Once the ship sections are transported to the designated location, the scaffolding must be installed with a fixed ship section ladder to facilitate the safe boarding and dismounting of the ship sections by construction personnel. When the ship sections need to be transported to another location again, the ship section ladder must be folded up and placed in place for reuse.

[0003] In the traditional construction plan, after the ship section is transported to the location, the inclined ladder is hung on the edge of the scaffolding walkway board perpendicular to the length direction of the scaffolding walkway board and fastened with iron wire. When the ship section needs to be transferred to another location, the iron wire fixing the inclined ladder is first removed, and then the entire inclined ladder is lifted and placed steadily on the scaffolding walkway board, and fastened with iron wire. When the ship section is transported to the location again, the iron wire fixing the inclined ladder is first removed, and then the inclined ladder is hung on the edge of the scaffolding walkway board perpendicular to the length direction of the scaffolding walkway board, and fastened with iron wire, and then preparations for construction are made again. Each transportation requires two dismantling and two fastenings, and for safety reasons, the removed iron wire cannot be reused. The operation is cumbersome and causes serious waste.

[0004] To address this issue, the prior art provides a fast-assembly and disassembly inclined ladder. By installing a snap-fit ​​device at the top of the ladder to connect to the scaffolding, the ladder can be quickly installed after transport and quickly disassembled for transfer, eliminating the need for wire tying and removal. However, during transfer, the ladder still requires only wire tying, which still requires removal after transport, thus failing to fully resolve the issue. Furthermore, because the ladder is perpendicular to the mesh walkway panels of the scaffolding, it occupies a large space, making it unsuitable for high-density placement of ship sections. Summary of the Invention

[0005] The purpose of the present invention is to provide a ship segmented up and down ladder and a method for using the same, so as to solve the problem that the internal pressure of carbon fiber cannot be obtained during the production process of existing equipment.

[0006] The present invention provides a ship's segmented up-and-down ladder, which is used for people to go up and down a scaffold. The scaffold includes a horizontal crossbar and a vertical upright bar. The horizontal crossbar and the vertical upright bar are fixedly connected. A mesh plate is laid above the horizontal crossbar. The mesh plate is arranged perpendicular to the horizontal crossbar. The mesh plate is used for people to walk on. The ship's segmented up-and-down ladder includes a climbing ladder and a hook assembly. The climbing ladder includes an inner rod and an outer rod parallel to each other. A plurality of footrests are arranged between the inner rod and the outer rod. The top ends of the inner rod and the outer rod are both rotatably connected to the horizontal crossbar. The inner rod and the outer rod are respectively arranged on both sides of the vertical upright bar. The hook assembly is rotatably arranged on the inner rod. The hook assembly can hang the climbing ladder on the mesh plate.

[0007] As the preferred technical solution for the ship's segmented up and down ladder, the top ends of the inner and outer rods are fixedly connected with movable sleeves, which are sleeved on the horizontal crossbar. The inner diameter of the movable sleeve is greater than or equal to the outer diameter of the horizontal crossbar.

[0008] As a preferred technical solution for the ship's segmented up and down ladder, the shape of the movable sleeve includes a C shape.

[0009] As the preferred technical solution for the ship's segmented up and down ladder, the distance between the inner rod and the mesh plate is smaller than the distance between the outer rod and the mesh plate. The hook assembly includes a hook sleeve, a connecting hook and a fixed handle. The hook sleeve is sleeved on the inner rod, and the connecting hook and the fixed handle are both welded to the outer side wall of the hook sleeve. The hook tip of the connecting hook can pass through the mesh of the mesh plate.

[0010] As an optimal technical solution for the ship's segmented up and down ladder, the weight of the fixed handle is greater than the weight of the connecting hook, and when the hook tip passes through the mesh, the fixed handle points to the ground.

[0011] As the preferred technical solution for the ship's segmented up and down ladder, the fixed handle is a tubular part, and the hook assembly also includes a movable handle. The outer diameter of the movable handle is smaller than the inner diameter of the fixed handle. The movable handle is partially inserted into the fixed handle, and the length of the movable handle is greater than the length of the fixed handle.

[0012] As the preferred technical solution for the ship's segmented up and down ladder, the connecting hook and the fixed handle are set at 180 degrees.

[0013] As the preferred technical solution for the ship's segmented up and down ladders, the ladder also includes a guardrail, which is fixedly connected to the outer rod and is used to prevent people from falling from the side of the ladder.

[0014] The present invention provides a method for using a ship's sectional ladder, which is applicable to the ship's sectional ladder of any of the above-mentioned solutions. The method for using the ship's sectional ladder includes:

[0015] When the ladder needs to be lowered, the hook assembly is separated from the mesh plate and the lower end of the ladder is placed on the ground;

[0016] When the ladder needs to be folded up, the lower end of the ladder is lifted to the mesh plate so that the hook assembly is hung on the mesh plate.

[0017] As a preferred technical solution for the method of using the ship's sectional ladder, the hook assembly includes a hook sleeve, a connecting hook and a fixed handle. The hook sleeve is sleeved on the inner rod, and the connecting hook and the fixed handle are welded to the outer wall of the hook sleeve;

[0018] The method for disengaging the hook assembly from the mesh plate includes:

[0019] Lift the fixed handle to move the hook assembly upwards;

[0020] Move the fixing handle toward the mesh plate to move the connecting hook away from the mesh plate;

[0021] The method of making the hook assembly hang on the mesh plate includes:

[0022] Move the fixing handle toward the mesh plate to move the connecting hook away from the mesh plate;

[0023] Lift the fixing handle so that the connecting hook is above the mesh plate;

[0024] Pull the fixing handle in the direction away from the mesh plate to move the connecting hook toward the mesh plate, and lower the fixing handle to make the connecting hook hang on the mesh plate.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a ship section up and down ladder, comprising a ladder and a hook assembly, wherein the ladder comprises an inner rod and an outer rod parallel to each other, a plurality of footrests are provided between the inner rod and the outer rod, the top ends of the inner rod and the outer rod are both rotatably connected to a horizontal crossbar, the inner rod and the outer rod are respectively provided on both sides of a vertical upright rod, and the hook assembly is rotatably provided on the inner rod, and the hook assembly can hang the ladder on a mesh plate. The inner rod and the outer rod of the ladder are rotatably connected to the horizontal crossbar of a scaffold, and during transportation or transshipment, the ladder can be lowered or folded up by rotation, and the hook assembly is provided at the same time, so that the ladder can be hung on the mesh plate, thereby eliminating the need to fasten it with iron wire during transportation, and the top end of the ladder is rotatably connected to the horizontal crossbar, so that the setting direction of the ladder is consistent with the direction of the mesh plate, thereby reducing the space occupied by the ship sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of a ship's segmented upper and lower ladder structure according to an embodiment of the present invention;

[0028] Figure 2 This is a structural schematic diagram of a ship's sectional upper and lower ladder in an embodiment of the present invention with the mesh plates hidden;

[0029] Figure 3 For Figure 2 A partial enlarged view of the middle A part;

[0030] Figure 4 An exploded view of the hook assembly in the embodiment of the present application;

[0031] Figure 5 A structural schematic view of the ladder stand in the embodiment of the present application.

[0032] In the figure:

[0033] 100, ladder stand; 200, guardrail; 300, scaffold; 400, connecting piece; 500, hull section plate;

[0034] 11, outer rod; 12, inner rod; 13, footstep; 14, movable sleeve; 15, hook assembly; 151, hook sleeve; 152, connecting hook; 153, fixed handle; 154, movable handle;

[0035] 31, horizontal crossbar; 32, vertical upright rod; 33, protection crossbar; 34, rail structure; 35, fastener; 36, mesh plate;

[0036] 41, U-shaped clamping piece; 42, clamping bolt. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] For the convenience of explanation, the position and connection relationship between the shell plate of the ship segment and the scaffolding 300 in the prior art are described here. Figure 1-Figure 2 As shown, Figure 1 and Figure 2The ship segmented shell 500 is connected to the scaffolding 300 via a connector 400. The connector 400 includes a U-shaped clamp 41 and a clamping bolt 42. One end of the U-shaped clamp 41 is fixedly connected to the horizontal crossbar 31 of the scaffolding 300. The ship segmented shell is placed in the groove of the U-shaped clamp 41 and locked by the clamping bolt 42. A mesh plate 36 is provided at one end of the horizontal crossbar 31 near the ship segmented shell 500 for people to walk on. The mesh plate 36 is fixedly connected to the horizontal crossbar 31. Vertical uprights 32 are also fixedly connected to the horizontal crossbar 31. The vertical uprights 32 are fixedly connected to the horizontal crossbar 31 via fasteners 35. Protective crossbars 33 and a railing structure 34 are fixedly connected to the vertical uprights 32 to facilitate personnel operations.

[0042] like Figure 1-Figure 5 As shown, the present invention provides a ship's segmented ladder for getting on and off a scaffolding 300 for allowing people to get on and off. The scaffolding 300 includes a horizontal crossbar 31 and a vertical upright bar 32. The horizontal crossbar 31 and the vertical upright bar 32 are fixedly connected. A mesh plate 36 is laid above the horizontal crossbar 31. The mesh plate 36 is arranged perpendicular to the horizontal crossbar 31. The mesh plate 36 is used for people to walk on. The ship's segmented ladder for getting on and off includes a ladder 100 and a hook assembly 15. The ladder 100 includes an inner rod 12 and an outer rod 11 parallel to each other. A plurality of footrests 13 are arranged between the inner rod 12 and the outer rod 11. The top ends of the inner rod 12 and the outer rod 11 are rotatably connected to the horizontal crossbar 31. The inner rod 12 and the outer rod 11 are respectively arranged on both sides of the vertical upright bar 32. The hook assembly 15 is rotatably arranged on the inner rod 12. The hook assembly 15 can hang the ladder 100 on the mesh plate 36. The inner rod 12 and the outer rod 11 of the ladder 100 are rotatably connected to the horizontal crossbar 31 of the scaffolding 300. During transportation or transshipment, the ladder 100 can be lowered or folded up by rotation. At the same time, a hook assembly 15 is provided to hang the ladder 100 on the mesh plate 36, so that it does not need to be fastened with iron wire during transportation. The top end of the ladder 100 is rotatably connected to the horizontal crossbar 31, so that the setting direction of the ladder 100 is consistent with the direction of the mesh plate 36, thereby reducing the space occupied by the ship sections.

[0043] Specifically, if Figure 2As shown, the top ends of the inner rod 12 and the outer rod 11 are both fixedly connected with movable sleeves 14, preferably by welding. The inner diameter of the movable sleeves 14 is greater than or equal to the outer diameter of the horizontal crossbar 31. The two movable sleeves 14 are respectively arranged on both sides of the vertical uprights 32, that is, the movable sleeves 14 are respectively arranged on both sides of the connection point between the horizontal crossbar 31 and the vertical uprights 32. Since the horizontal crossbar 31 and the vertical uprights 32 are fixedly connected, the movable sleeves cannot slide arbitrarily on the horizontal crossbar 31. Therefore, the movable sleeves 14 can be prevented from sliding circumferentially on the horizontal crossbar 31, thereby preventing the movable sleeves 14 from escaping from the end of the horizontal crossbar 31 and causing the ladder 100 to fall over. In this embodiment, the distance between the outer end of the movable sleeve 14 connected to the outer end of the horizontal crossbar 31 of the scaffolding 300 is 1 to 2 times the width of the movable sleeve 14, and the distance between the inner side of the vertical upright 32 of the scaffolding 300 and the outer end of the other movable sleeve 14 is 0 to 0.5 times the width of the movable sleeve 14. The movable sleeve 14 can be circular or C-shaped. When the movable sleeve 14 is circular, both movable sleeves 14 must be completely mounted on the horizontal crossbar 31 before installing the vertical upright 32, and then the vertical upright 32 must be installed between the two horizontal crossbars 31. When the movable sleeve 14 is C-shaped, the order of installing the movable sleeve 14 and the vertical rod 32 is not limited. If the vertical rod 32 is installed first, the openings of the two C-shaped movable sleeves 14 are clamped on the horizontal crossbar 31, and an external force is applied. Within the elastic deformation range, the openings of the C-shaped movable sleeve 14 expand under the action of the external force, thereby being fitted onto the horizontal crossbar 31. It is understood that the opening width of the C-shaped movable sleeve 14 depends on the material and the diameter of the horizontal crossbar 31, and therefore is not listed here.

[0044] Alternatively, as Figure 1 and Figure 5 As shown, the distance between the inner rod 12 and the mesh plate 36 is smaller than the distance between the outer rod 11 and the mesh plate 36, that is, the inner rod 12 is the rod close to the mesh plate 36, and the outer rod 11 is the rod away from the mesh plate 36. Since the inner rod 12 is close to the mesh plate 36, when people go up and down the ladder 100, the side of the inner rod 12 is blocked by the scaffolding 300, and there is no risk of falling. Therefore, a guardrail 200 is fixedly connected to the outer rod 11, and the connection method is preferably welding. The guardrail 200 is used to prevent people from falling from the side of the ladder 100, that is, the side of the outer rod 11. The height of the guardrail 200 is not less than 1.2m to play an effective protective role. The structure of the guardrail 200 is the prior art in this field and will not be described in detail here.

[0045] Furthermore, if Figure 2-Figure 4As shown, the hook assembly 15 comprises a hook sleeve 151, a connecting hook 152 and a fixing handle 153. The hook sleeve 151 is sleeved on the inner side rod 12, and the hook sleeve 151 can rotate and / or slide along the axis of the inner side rod 12. The connecting hook 152 and the fixing handle 153 are both welded on the outer side wall of the hook sleeve 151, and the hook tip of the connecting hook 152 can pass through the mesh of the mesh plate 36, so that the ladder 100 is firmly hung on the scaffold 300 through the hook assembly 15, avoiding the ladder 100 from falling off the scaffold 300 during transportation.

[0046] Specifically, the weight of the fixing handle 153 is greater than that of the connecting hook 152, and the fixing handle 153 points to the ground when the hook tip passes through the mesh. In the embodiment, the connecting hook 152 and the fixing handle 153 are arranged at 180°, and when the connecting hook 152 is hung on the mesh plate 36, the hook tip of the connecting hook 152 passes through the mesh of the mesh plate 36, at this time the ladder 100 is hung on the scaffold 300, and in order to avoid the interference of bumps and the like generated during transportation from causing the hook to be separated from the mesh plate 36, the connecting hook 152 and the fixing handle 153 are arranged at 180° and the weight of the fixing handle 153 is greater than that of the connecting hook 152, so as to ensure that in the natural static state, the fixing handle 153 is always vertically downward or approximately vertically downward, and the connecting hook 152 is in the shape of an approximately inverted U, at this time the hook body of the hook is in contact with the side wall and the top wall of the mesh plate 36, and the hook tip passes through the mesh of the mesh plate 36, and under the action of the fixing handle 153, the connecting hook 152 locks the mesh plate 36. When bumps occur during transportation, the connecting hook 152 will jump upward, but due to the large weight of the fixing handle 153, the connecting hook 152 will still fall back to the original position after jumping, ensuring the reliability during transportation. In other embodiments, only the positional relationship between the connecting hook 152 and the fixing handle 153 can be changed, and the two are arranged vertically, and the shape of the hook is adaptively changed, such as a semicircle, which can also achieve the same effect, and the specific implementation principle is the same as that when the two are arranged at 180°, so it is not described again.

[0047] Optionally, as Figure 4As shown, the fixed handle 153 is a tubular component, and the hook assembly 15 also includes a movable handle 154. The outer diameter of the movable handle 154 is smaller than the inner diameter of the fixed handle 153, and a portion of the movable handle 154 is inserted into the fixed handle 153. The length of the movable handle 154 is greater than the length of the fixed handle 153. Due to the high height of the mesh plate 36, it is easy to encounter a situation where the height is insufficient when operating the fixed handle 153 to lift or lower the ladder 100. Therefore, the movable handle 154 is provided to achieve the purpose of lengthening the ladder 100, thereby overcoming the problem of insufficient height. Similarly, on this basis, a tubular component with an inner diameter larger than the outer diameter of the movable handle 154 can be added and placed over another portion of the movable handle 154 to achieve further lengthening.

[0048] The present invention provides a method for using a ship's sectional ladder, which is applied to the ship's sectional ladder in this embodiment. The method for using the ship's sectional ladder includes:

[0049] When the ladder 100 needs to be lowered, the hook assembly 15 is disengaged from the mesh plate 36 and the lower end of the ladder 100 is placed on the ground;

[0050] When the ladder 100 needs to be folded up, the lower end of the ladder 100 is lifted to the mesh plate 36 so that the hook assembly 15 is hung on the mesh plate 36 .

[0051] Specifically, after the ship sections are transported to their designated locations, personnel lift fixed handle 153 from the ground, moving connecting hook 152 upward until the hook tip of connecting hook 152 clears the mesh of mesh plate 36. Fixed handle 153 is then pulled toward mesh plate 36, moving connecting hook 152 away from mesh plate 36. At this point, the entire connecting hook 152 is positioned outside mesh plate 36. Fixed handle 153 is then operated to lower ladder 100 until the lower end of ladder 100 touches the ground. Fixed handle 153 is then released, allowing ladder 100 to descend to the ground.

[0052] When a ship section needs to be transferred, a person lifts the fixed handle 153 from the ground. When the connecting hook 152 approaches the mesh plate 36, the fixed handle 153 is pulled toward the mesh plate 36, moving the connecting hook 152 away from the mesh plate 36. At this point, the entire connecting hook 152 is located outside the mesh plate 36. The fixed handle 153 is further lifted upward, so that the entire connecting hook 152 is located above the mesh plate 36. The fixed handle 153 is pulled away from the mesh plate 36, moving the connecting hook 152 toward the mesh plate 36, with the hook tip of the connecting hook 152 located above the mesh. If the hook tip of the connecting hook 152 is directly above the mesh wire of the mesh plate 36, preventing it from passing through the mesh, the fixed handle 153 can be slightly lifted, and the hook sleeve 151 can be pushed along the inner rod 12 to slide a distance, so that the hook tip of the connecting hook 152 is located above the mesh. Finally, the fixing handle 153 is lowered to allow the hook tip of the connecting hook 152 to pass through the mesh, thereby reliably hanging the ladder 100 on the scaffold 300 .

[0053] It should be pointed out that when the height of the ship section is higher, a movable handle 154 can be added as needed to meet the operational requirements. The specific operating steps are exactly the same as the above content, so they will not be repeated here.

[0054] The ship section access ladder and its use method provided by the present invention take up less space during use, facilitate the high-density placement of ship sections, and do not cause inconvenience to the transportation of other ship sections. When the status of a ship section is switched, a single person only needs to perform simple operations on the ground to complete the lowering and stowing. Compared with traditional methods, there is no need to use temporary devices to climb up the scaffolding 300 for lowering and stowing, and no need for two people to work together. This saves manpower, reduces labor intensity, and reduces operational difficulty. It also eliminates the safety hazards that may exist when people climb up the scaffolding 300 using temporary devices.

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A ship's segmented ladder for ascending and descending a scaffold (300) for allowing personnel to ascend and descend the scaffold (300), wherein the scaffold (300) comprises a horizontal crossbar (31) and a vertical upright bar (32), wherein the horizontal crossbar (31) and the vertical upright bar (32) are fixedly connected, and a mesh plate (36) is laid above the horizontal crossbar (31), wherein the mesh plate (36) is arranged perpendicular to the horizontal crossbar (31), and wherein the mesh plate (36) is used for allowing personnel to walk, and wherein the mesh plate (36) is characterized in that: include: A ladder (100) comprising an inner rod (12) and an outer rod (11) parallel to each other, a plurality of footrests (13) being provided between the inner rod (12) and the outer rod (11), the top ends of the inner rod (12) and the outer rod (11) being rotatably connected to the horizontal crossbar (31), and the inner rod (12) and the outer rod (11) being respectively provided on both sides of the vertical upright rod (32); a hook assembly (15), the hook assembly (15) being rotatably disposed on the inner rod (12), and the hook assembly (15) being capable of hanging the ladder (100) on the mesh plate (36); The distance between the inner rod (12) and the mesh plate (36) is smaller than the distance between the outer rod (11) and the mesh plate (36); the hook assembly (15) comprises a hook sleeve (151), a connecting hook (152) and a fixed handle (153); the hook sleeve (151) is sleeved on the inner rod (12); the connecting hook (152) and the fixed handle (153) are both welded to the outer wall of the hook sleeve (151); the hook tip of the connecting hook (152) can pass through the mesh of the mesh plate (36); The weight of the fixed handle (153) is greater than the weight of the connecting hook (152), and when the hook tip passes through the mesh, the fixed handle (153) points to the ground.

2. The ship segmented ladder according to claim 1, characterized in that: The top ends of the inner rod (12) and the outer rod (11) are both fixedly connected with a movable sleeve (14), the movable sleeve (14) is sleeved on the horizontal cross bar (31), and the inner diameter of the movable sleeve (14) is greater than or equal to the outer diameter of the horizontal cross bar (31).

3. The ship segmented ladder according to claim 2, characterized in that: The shape of the movable sleeve (14) includes a C shape.

4. The ship segmented ladder according to claim 1, characterized in that: The fixed handle (153) is a tubular part. The hook assembly (15) further includes a movable handle (154). The outer diameter of the movable handle (154) is smaller than the inner diameter of the fixed handle (153). The movable handle (154) is partially inserted into the fixed handle (153). The length of the movable handle (154) is greater than the length of the fixed handle (153).

5. The ship segmented ladder according to claim 1, characterized in that: The connecting hook (152) and the fixed handle (153) are arranged at 180 degrees.

6. The ship segmented ladder according to any one of claims 1 to 5, characterized in that: The ladder (100) further comprises a guardrail (200), wherein the guardrail (200) is fixedly connected to the outer rod (11), and the guardrail (200) is used to prevent people from falling from the side of the ladder (100).

7. The method for using the ship's sectioned ladder is characterized by: Applicable to the ship section ladder according to any one of claims 1 to 6, the method for using the ship section ladder comprises: When the ladder (100) needs to be lowered, the hook assembly (15) is separated from the mesh plate (36), and the lower end of the ladder (100) is placed on the ground; When the ladder (100) needs to be folded up, the lower end of the ladder (100) is lifted to the mesh plate (36), so that the hook assembly (15) is hung on the mesh plate (36).

8. The method for using the ship's sectional ladder according to claim 7, characterized in that: The hook assembly (15) comprises a hook sleeve (151), a connecting hook (152) and a fixed handle (153); the hook sleeve (151) is sleeved on the inner rod (12); the connecting hook (152) and the fixed handle (153) are both welded to the outer wall of the hook sleeve (151); The method for disengaging the hook assembly (15) from the mesh plate (36) comprises: Lifting the fixed handle (153) to move the hook assembly (15) upward; Pulling the fixed handle (153) toward the mesh plate (36) to move the connecting hook (152) away from the mesh plate (36); The method for hanging the hook assembly (15) on the mesh plate (36) comprises: Pulling the fixed handle (153) toward the mesh plate (36) to move the connecting hook (152) away from the mesh plate (36); Lifting the fixed handle (153) so that the connecting hook (152) is located above the mesh plate (36); The fixing handle (153) is pulled in a direction away from the mesh plate (36) to move the connecting hook (152) toward the mesh plate (36), and the fixing handle (153) is lowered to allow the connecting hook (152) to hang on the mesh plate (36).

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