Boarding ladder

Abstract

The invention discloses a boarding ladder, and relates to the technical field of ship equipment, the boarding ladder comprises a boarding ladder main body, a lap joint part and a movable pedal, the boarding ladder main body comprises a treading part and a main ladder frame made of a carbon fiber material, the treading part is laid on the main ladder frame, and the treading part and the main ladder frame can be detached; the lap joint parts are mounted at the bottoms of the two ends of the main ladder frame and used for being in lap joint with a deck and a wharf respectively; one end of the movable pedal is connected with one side, far away from the main ladder frame, of the lap joint part, and the other end of the movable pedal can be placed on a deck or a wharf. According to the boarding ladder provided by the invention, the main body is made of a carbon fiber material, so that the weight is light; the overall structure is simple and convenient to disassemble and assemble.

Description

Technical Field

[0001] The present invention relates to the technical field of ship equipment, in particular to a boarding ladder. Background Art

[0002] As an important connection device between the ship and the shore or dock, the safety and convenience of the boarding ladder play a vital role in the ship's operation, maintenance and cargo loading and unloading. Most boarding ladders are fixed or integral. While these designs bring stability, they also face problems such as difficult handling, cumbersome installation, and poor flexibility. In order to overcome these shortcomings, the research and development of detachable boarding ladders has gradually become the focus of the industry.

[0003] Some detachable boarding ladders known to the inventors often have the problems of heavy weight, complex structure, cumbersome disassembly and installation steps, and are difficult to be widely promoted in practical applications. Therefore, it is urgent to design a lightweight, simple structure and easy to disassemble boarding ladder. Summary of the invention

[0004] The purpose of the present invention is to provide a boarding ladder to solve the problems existing in the above-mentioned prior art. The main body is made of carbon fiber material and is light in weight; the overall structure is simple and easy to disassemble and assemble.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a boarding ladder, comprising:

[0007] The boarding ladder body comprises a tread portion and a main ladder frame made of carbon fiber material, wherein the tread portion is laid on the main ladder frame, and the tread portion and the main ladder frame are detachable;

[0008] Overlapping parts are installed at the bottom of both ends of the main ladder frame and are used to overlap the deck and the dock respectively;

[0009] A movable pedal, one end of which is connected to a side of the overlapped portion away from the main ladder frame, and the other end of which can be placed on a deck or a dock; the foldable and detachable movable pedal is convenient for personnel to go up and down the ladder from the deck or the dock ground.

[0010] Optionally, the main ladder frame is a Japanese-shaped structure, and a plurality of the treading parts are sequentially glued to the main ladder frame.

[0011] Optionally, the treading portion includes a grille pedal and an anti-slip strip, the grille pedal is laid on the main ladder frame, and a plurality of transversely arranged anti-slip strips are sequentially glued to the upper end surface of the grille pedal.

[0012] Optionally, the anti-slip strip is a hollow aluminum structure, and a serrated arc surface is provided on the outer top end of the anti-slip strip.

[0013] Optionally, a dovetail groove is provided at the bottom of the main ladder frame and is arranged along the length direction of the main ladder frame, and a nylon protective plate is clamped in the dovetail groove.

[0014] Optionally, the main ladder frame is provided with a C-shaped beam made of carbon fiber material, the C-shaped beam is symmetrically arranged on both sides of the treading part, and a carrying handle is fixedly provided at the groove on the inner side of the C-shaped beam.

[0015] Optionally, handrails are provided on both sides of the boarding ladder body, and the handrails include handrails made of carbon fiber tubes, and a plurality of tapered pins are fixedly provided at the bottom of the handrails; a handrail seat is provided on the C-shaped beam, and the handrail seat includes a plurality of tapered hole seats vertically arranged in the C-shaped beam, and the tapered pins can be plugged into the corresponding tapered hole seats. The main components such as the main ladder frame, handrails, and movable pedals of the present invention are made of carbon fiber composite materials, which greatly reduces the overall weight while meeting the strength requirements, and can solve the problem that steel or aluminum boarding ladders are too heavy to be erected and transported.

[0016] Optionally, a railing upper seat is provided on the top of the C-shaped beam, a vertical through hole is formed on the railing upper seat, and the railing upper seat is located on the top of the conical hole seat, and the conical pin is inserted into the conical hole seat after passing through the railing upper seat; a positioning hole is formed on the upper side wall of the conical pin, and a pin hole is formed on the side wall of the railing upper seat, and the pin hole is used for inserting a handrail quick-release pin, and the end of the handrail quick-release pin can pass through the pin hole and abut against the positioning hole.

[0017] Optionally, the overlapping portion includes a wheel frame, the wheel frame is connected to both ends of the main ladder frame, and a wheel frame roller is provided at the bottom of the wheel frame, and the wheel frame roller can be set on a deck or a dock.

[0018] Optionally, a movable pedal ear is provided at one end of the movable pedal, and a movable pedal roller is provided at the bottom of the other end; a wheel frame ear is fixedly provided on the outer side of the wheel frame, and the movable pedal ear is movably connected to the corresponding wheel frame ear via a pin shaft; a pedal portion is provided on the movable pedal, and the pedal portion includes a grille pedal and an anti-slip strip.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] The main ladder frame, overlapping part and movable pedal of the present invention are all made of carbon fiber composite materials. Under the premise of meeting the overall strength requirements, the overall weight is reduced and it is easy to carry; the main ladder frame, the treading part, the overlapping part and the movable pedal are independently arranged and can be disassembled, so it is easy to disassemble, assemble and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the boarding ladder of the present invention;

[0023] Figure 2 It is a schematic diagram of the main structure of the boarding ladder of the present invention;

[0024] Figure 3 It is a partial enlarged schematic diagram of the main body of the boarding ladder of the present invention;

[0025] Figure 4 This is a schematic diagram of a movable pedal of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure after the handrail and C-beam of the present invention are installed;

[0027] Figure 6 This is a schematic diagram of the handrail and C-beam disassembly and assembly structure of the present invention;

[0028] Figure 7 For the present invention Figure 6 A partial enlarged schematic diagram of

[0029] Figure 8 It is a schematic diagram of the connection structure between the wheel frame and the main ladder frame of the present invention.

[0030] Figure markings: 1-boarding ladder body; 2-main ladder frame; 3-C-shaped beam; 4-railing seat; 5-handrail; 6-wheel frame; 7-movable pedal; 8-first anti-slip strip; 9-first grille pedal; 10-second anti-slip strip; 11-second grille pedal; 12-carrying handle; 13-pin shaft; 14-railing upper seat; 15-conical hole seat; 16-handrail railing; 17-conical pin; 18-handrail quick-release pin; 19-wheel frame roller; 20-movable pedal roller; 21-nylon protective plate; 22-movable pedal ear; 23-wheel frame ear. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a boarding ladder to solve the problems existing in the above-mentioned prior art. The main body is made of carbon fiber material and is light in weight; the overall structure is simple and easy to disassemble and assemble.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The inventors know of a boarding ladder for surface ships, the main body of which is made of steel or aluminum, which is heavy, difficult to carry and maintain in daily use, and inconvenient to use. Since carbon fiber composite materials are light in weight, have good mechanical properties, and excellent corrosion resistance, in addition to these, carbon fiber composite materials also have excellent properties such as oil resistance and radiation resistance, they are very suitable for the performance requirements of ship equipment materials. Based on this, the inventors propose a boarding ladder, such as Figures 1 to 8 As shown, its structure includes a boarding ladder body 1, a lap joint and a movable pedal 7. The boarding ladder body 1 includes a stepping part and a main ladder frame 2 made of carbon fiber material. The stepping part is laid on the main ladder frame 2, and the stepping part and the main ladder frame 2 can be disassembled; the lap joint is installed at the bottom of both ends of the main ladder frame 2, and is used to overlap the deck and the dock respectively; one end of the movable pedal 7 is connected to the side of the lap joint away from the main ladder frame 2, and the other end can be placed on the deck or the dock; the foldable and detachable movable pedal 7 is convenient for people to get on and off the ladder from the deck or the dock ground. The boarding ladder body 1 is made of carbon fiber composite material. On the premise of meeting the strength, the overall weight is greatly reduced. One end of it is placed on the dock and the other end is placed on the deck. It can be used as a passage for people to get on and off the ship when the ship is docked at the dock. For the height difference between different ports and the hull, the boarding ladder of this embodiment has an adjustable angle. By adjusting different use angles, it can meet the use of different height differences within a certain range.

[0035] In one embodiment, the overlapped portion adopts a detachable and movable structure, so the overlapped portion in this embodiment adopts a wheel frame 6, which is fixed to both ends of the main ladder frame 2 by a mixed connection method of adhesive and bolts, and a wheel frame roller 19 is provided at the bottom of the wheel frame 6, and the wheel frame roller 19 can be set on the deck or the dock. Since there is generally a height difference between the deck and the dock, in order to adapt to the height difference between the two, the movable pedals 7 at both ends of the main ladder frame 2 can be respectively set on the deck and the dock, so the movable pedals 7 of this embodiment are movably arranged on the outside of the wheel frame 6 in an angle-adjustable manner. In one of the embodiments, a movable pedal ear 22 is provided at one end of the movable pedal 7, and a movable pedal roller 20 is provided at the bottom of the other end; a wheel frame ear 23 is fixedly provided on the outer side of the wheel frame 6, and the movable pedal ear 22 is movably connected with the corresponding wheel frame ear 23 through a pin shaft 13, so that the movable pedal 7 can rotate around the pin shaft 13, thereby adjusting its angle; a pedal portion is also provided on the movable pedal 7, and the pedal portion includes a grille pedal and an anti-slip strip. In this embodiment, the pedal portion on the movable pedal 7 is the first pedal portion, and its grille pedal and anti-slip strip are the first grille pedal 9 and the first anti-slip strip 8; the pedal portion on the main ladder frame 2 is the second pedal portion, and its grille pedal and anti-slip strip are the second grille pedal 11 and the second anti-slip strip 10. The grille pedal adopts a structure with grille holes, which reduces the overall weight, and there is no water accumulation on its surface. When the ambient temperature is low, ice will not form on the grille pedal, and it cooperates with the anti-slip strip to improve the anti-slip performance.

[0036] In one embodiment, the main ladder frame 2 is a Japanese-shaped frame structure, which further reduces its overall weight compared with the overall plate-shaped structure. In this embodiment, the second grid pedal 11 can adopt a split structure, and multiple second grid pedals 11 connected end to end are sequentially glued to the main ladder frame 2 for easy disassembly and assembly. For the safety of personnel boarding and disembarking, handrails 5 are provided on both sides of the boarding ladder body 1 in this embodiment. The handrails 5 include handrails 16 made of carbon fiber tubes, and multiple tapered pins 17 are fixed at the bottom of the handrails 16.

[0037] In this embodiment, a C-shaped beam 3 made of carbon fiber is provided on the main ladder frame 2. The C-shaped beam 3 is symmetrically arranged on both sides of the stepping part, and a carrying handle 12 is fixedly provided in the groove on the inner side of the C-shaped beam 3. The carrying handle 12 is designed to be hidden, which is simple and space-saving, and is convenient for personnel to carry and set up the boarding ladder between the deck and the dock. A handrail seat 4 is provided on the C-shaped beam 3. The handrail seat 4 includes a plurality of conical hole seats 15 vertically arranged in the C-shaped beam 3, and the conical pin 17 can be inserted into the corresponding conical hole seat 15. The main components of the main ladder frame 2, handrail 16, movable pedal 7 and the like of the present invention are made of carbon fiber composite materials. On the premise of meeting the strength requirements, the overall weight is greatly reduced, which can solve the problem that steel or aluminum boarding ladders are too heavy to be set up and transported.

[0038] During installation, the main ladder frame 2 is installed on the wheel frame 6; the second grid pedal 11 is assembled on the assembled main ladder frame 2; the C-shaped beam 3 is installed on both sides of the second grid pedal 11, and the handrail seat 4 and the tapered hole seat 15 are assembled and glued into the C-shaped beam 3; the second anti-slip strip 10 is evenly glued on the second grid pedal 11; then the handrail 5 is installed and adjusted to complete the installation of the boarding ladder. When disassembling, the operation can be reversed, which simplifies the disassembly and assembly steps.

[0039] When in use, the movable pedals 7 at both ends of the boarding ladder of the present invention are placed on the dock at one end and on the deck at the other end. The movable pedals 7 can be appropriately adjusted according to the need of the tilt angle until they can be fixed horizontally to meet different use conditions. The head and tail ends of the handrails 5 are connected to the side railings of the ship through rope chains to ensure the safety of personnel. When the boarding ladder is not in use, it can be fastened to the side wall of the ship passage through the eye ring on the ladder frame using a shelf, rope, etc.

[0040] In a preferred embodiment, in order to ensure that the handrail 5 can be firmly fixed on both sides of the boarding ladder body 1 after installation to avoid falling during use, a handrail upper seat 14 is provided on the top of the C-shaped beam 3 in this embodiment. The handrail upper seat 14 is provided with a vertical through hole, and the handrail upper seat 14 is located at the top of the conical hole seat 15. The conical pin 17 passes through the handrail upper seat 14 and is inserted into the conical hole seat 15; a positioning hole is provided on the upper side wall of the conical pin 17, and a pin hole is provided on the side wall of the handrail upper seat 14. The pin hole is used to pass a handrail quick-release pin 18. The end of the handrail quick-release pin 18 can pass through the pin hole and abut against the positioning hole. The use of the handrail quick-release pin 18 can ensure the safety of people going up and down the ladder. It can be quickly disassembled for transportation or storage, which is convenient for transportation and maintenance.

[0041] The present invention makes full use of carbon fiber composite materials in material selection. In one embodiment, the carbon fiber composite material adopts carbon fiber reinforced epoxy resin composite material, which is corrosion-resistant, aging-resistant, and has good mechanical toughness. It can be used for a long time in a marine environment to achieve the goal of lightweight. The wheel frame 6 and the like are made of aluminum alloy materials, and their surfaces are treated by oxidation passivation to meet the anti-corrosion requirements. The pin shaft 13, the handrail quick-release pin 18 and the like are made of stainless steel materials to enhance the anti-corrosion performance of the device. The parts of the metal parts such as the pin shaft 13, the handrail quick-release pin 18, the wheel frame 6, etc. that may contact with the carbon fiber composite material parts are coated and isolated with insulating glass fiber cloth to avoid the occurrence of electrochemical corrosion.

[0042] In a preferred embodiment, the first anti-slip strip 8 and the second anti-slip strip 10 are both made of hollow aluminum structure, and the outer top of the first anti-slip strip 8 and the second anti-slip strip 10 is provided with a serrated arc surface, which not only improves the anti-slip effect, but also reduces the weight, and also ensures the comfort of personnel when stepping from the upper and lower directions. In this embodiment, the bottom of the main ladder frame 2 has a dovetail groove arranged along the length direction of the main ladder frame 2, and a nylon protective plate 21 is clamped in the dovetail groove, which plays a protective role when the ship's side collides with the bottom of the sun-shaped main ladder frame 2.

[0043] The boarding ladder of the present invention is simple and quick to disassemble and assemble. During installation, the main ladder frame 2 is installed on the wheel frame 6. During the installation process, it is necessary to support the middle part of the main ladder frame 2 to prevent deflection. After the main ladder frame 2 is installed, it is cooperated with the wheel frame 6 to punch holes. The main ladder frame 2 and the wheel frame 6 are connected by a mixed connection method of adhesive bonding and bolts, which is more firmly connected and convenient for disassembly and assembly. The two ends of the wheel frame 6 are connected with movable pedals 7. The second grid pedal 11 is assembled on the main ladder frame 2. The second grid pedal 11 and the main ladder frame 2 are glued. The C-shaped beam 3 is installed on both sides of the second grid pedal 11, and the railing seat 4 is assembled and bonded into the C-shaped beam 3. The C-shaped beam 3 and the second grid pedal 11 are glued; a hole is opened on the flange of the C-shaped beam 3 where the railing seat 4 needs to be assembled, and the hole position must be accurate. During the assembly process of the railing seat 4, the handrail quick release pin 18 is used to assist in positioning to ensure that the railing and the boarding ladder body 1 are well matched after the assembly is completed. The railing seat 4 and the C-shaped beam 3 are connected by a mixed connection of adhesive bonding and bolts. Then, the second anti-slip strip 10 is installed. During the installation, buckles are used to increase the bonding area and connection strength between the second anti-slip strip 10 and the second grille pedal 11 .

[0044] The boarding ladder provided by the present invention adopts lightweight and high-strength carbon fiber composite materials as the manufacturing material of the boarding ladder main body 1 structure, while ensuring the load-bearing capacity and strength of the boarding ladder. At the same time, the safety requirements and environmental requirements for composite materials on board ships are taken into consideration, thereby achieving the purpose of lightweight structure. There is no water accumulation on the surface of the second grid pedal 11. When the ambient temperature is low, ice will not form on the second grid pedal 11, which improves the anti-slip property and reduces the overall weight. Removable handrails 5 are provided on both sides of the boarding ladder main body 1 to ensure the safety of personnel while facilitating transportation and maintenance. The wheel frame rollers 19 and movable pedal rollers 20 are made of non-metallic materials to prevent damage to the deck paint during displacement.

[0045] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A boarding ladder, characterized in that: include: The boarding ladder body comprises a tread portion and a main ladder frame made of carbon fiber material, wherein the tread portion is laid on the main ladder frame, and the tread portion and the main ladder frame are detachable; Overlapping parts are installed at the bottom of both ends of the main ladder frame and are used to overlap the deck and the dock respectively; A movable pedal has one end connected to a side of the overlapped portion away from the main ladder frame, and the other end capable of being placed on a deck or a dock.

2. The boarding ladder according to claim 1, characterized in that: The main ladder frame is a Japanese-shaped structure, and a plurality of the treading parts are sequentially glued to the main ladder frame.

3. The boarding ladder according to claim 1, characterized in that: The treading part comprises a grille pedal and an anti-skid strip. The grille pedal is laid on the main ladder frame. A plurality of transversely arranged anti-skid strips are sequentially glued to the upper end surface of the grille pedal.

4. The boarding ladder according to claim 3, characterized in that: The anti-slip strip is an aluminum hollow structure, and a sawtooth arc surface is provided on the outer top end of the anti-slip strip.

5. The boarding ladder according to claim 1, characterized in that: A dovetail groove is arranged at the bottom of the main ladder frame along the length direction of the main ladder frame, and a nylon protective plate is clamped in the dovetail groove.

6. The boarding ladder according to claim 1, characterized in that: The main ladder frame is provided with a C-shaped beam made of carbon fiber material, the C-shaped beam is symmetrically arranged on both sides of the treading part, and a carrying handle is fixedly provided at the groove on the inner side of the C-shaped beam.

7. The boarding ladder according to claim 6, characterized in that: Handrails are provided on both sides of the boarding ladder body, and the handrails include handrails made of carbon fiber tubes, and a plurality of conical pins are fixedly provided at the bottom of the handrails; a handrail seat is provided on the C-shaped beam, and the handrail seat includes a plurality of conical hole seats vertically arranged in the C-shaped beam, and the conical pins can be inserted into the corresponding conical hole seats.

8. The boarding ladder according to claim 7, characterized in that: A railing upper seat is provided on the top of the C-shaped beam, a vertical through hole is formed on the railing upper seat, and the railing upper seat is located on the top of the conical hole seat, and the conical pin is inserted into the conical hole seat after passing through the railing upper seat; a positioning hole is formed on the upper side wall of the conical pin, and a pin hole is formed on the side wall of the railing upper seat, and the pin hole is used for inserting a handrail quick-release pin, and the end of the handrail quick-release pin can pass through the pin hole and abut against the positioning hole.

9. The boarding ladder according to claim 1, characterized in that: The overlapping part comprises a wheel frame, and the wheel frame is connected to two ends of the main ladder frame. A wheel frame roller is provided at the bottom of the wheel frame, and the wheel frame roller can be arranged on a deck or a dock.

10. The boarding ladder according to claim 9, characterized in that: A movable pedal ear is provided at one end of the movable pedal, and a movable pedal roller is provided at the bottom of the other end; a wheel frame ear is fixedly provided on the outer side of the wheel frame, and the movable pedal ear is movably connected with the corresponding wheel frame ear through a pin shaft; a pedal portion is provided on the movable pedal, and the pedal portion includes a grille pedal and an anti-slip strip.

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