A balustrade arrangement for a ship helicopter deck

Abstract

The present application belongs to the ship technical field, disclose a kind of guardrail device for ship helicopter landing platform.The landing platform is equipped with first support and second support, guardrail device includes two guardrails corresponding with two support components, power assisting mechanism and set between two guardrails detachable piece, detachable piece is locked with guardrail by lock mechanism;Guardrail is equipped with first base and second base, two first base correspond with two first support, first support and first base can rotate around pivot;Power assisting mechanism includes first pin and torsional spring, first pin passes through second base and second support along second direction, second pin and pivot are coaxially arranged;Torsional spring is sleeved on first pin, two ends are fixed on base and first pin respectively;Torsional arm of torsional spring abuts on the side surface of flange of second support, the pre-tightening force of torsional spring makes guardrail stand, external force drives guardrail to make guardrail to open and fall down, and it is quick and labor-saving to operate.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to a guardrail device for a ship's helicopter landing platform. Background Technology

[0002] Removable guardrails installed at the deck access openings of ship helicopter landing platforms are used to protect personnel walking on the platform from falls through the deck openings. These guardrails must be removed for helicopter takeoffs and landings to ensure safe operation. In related technologies, removable guardrails at openings are typically connected using numerous bolts, requiring 2-3 people to operate, which is cumbersome, time-consuming to disassemble and reassemble, and inefficient. Especially during helicopter operations, where rapid disassembly is required, this method cannot meet the demands of efficient operation, impacting work efficiency. Furthermore, after removing the guardrails during helicopter takeoffs and landings, the lack of protective measures around the opening poses a safety hazard to personnel working at the edge, increasing the risk of falls. Summary of the Invention

[0003] The purpose of this invention is to provide a guardrail device for ship helicopter landing platforms that is quick and easy to operate, effectively ensuring the safety of helicopter take-off and landing and the safety of personnel working near the opening.

[0004] To achieve this objective, the present invention adopts the following technical solution: A guardrail device for a ship's helicopter landing platform is provided at the opening of the landing platform. The landing platform has two support assemblies along a first direction. The support assembly includes two first supports spaced apart along a second direction and a second support located between the two first supports. The first direction and the second direction are arranged at an angle. The guardrail device includes: Two guardrails are provided, corresponding to the two support assemblies. The guardrails are provided with first bases at both ends and second bases in the middle. The two first bases correspond to the two first supports. The first supports and the first bases can rotate around the pivot. The assist mechanism includes a first pin and a torsion spring. The first pin passes through the second base and the second support in a second direction, and the first pin and the rotating shaft are coaxially arranged. The torsion spring is sleeved on the first pin, and its two ends are fixed to the base and the first pin, respectively. The torsion arm of the torsion spring abuts against the side of the flange of the second support. The preload of the torsion spring makes the guardrail stand upright, and the external force drives the guardrail to rotate around the first pin in a direction away from the flange, so that the guardrail is lowered toward the opening. A detachable piece is disposed between the two guardrails and locked to the guardrails by a locking mechanism.

[0005] In some embodiments, the heights of the two first pins corresponding to the two guardrails are different, and the two guardrails are stacked after being laid down, with the guardrail corresponding to the lower first pin located below the guardrail corresponding to the higher first pin.

[0006] In some embodiments, the first support and the first base are provided with two sets of mounting holes in the vertical direction. One set of mounting holes is used to install the second pin, and the other set of mounting holes is used to install the rotating shaft. Both the first direction and the second direction are perpendicular to the vertical direction.

[0007] In some embodiments, the second pin can be inserted into a locking tongue, which allows the first support and the first base to abut against each other.

[0008] In some embodiments, two torsion springs are provided, with the two torsion springs located on both sides of the first pin shaft on the second base.

[0009] In some embodiments, the assistive mechanism further includes: A locating pin, passing through the first pin shaft and the second support along the first direction; and / or The first pin has a slot at its end, the torsion arm of the torsion spring is inserted into the slot, and the stop pin is inserted into the slot of the first pin to limit the torsion arm.

[0010] In some embodiments, the locking mechanism includes: A locking assembly is provided on the detachable piece, the locking assembly including a first hook and a resilient locking tongue; A mating component is provided on the guardrail, the mating component including a first ear plate; When the detachable piece is installed downwards, the first hook is hooked into the hole of the first ear plate, the elastic locking tongue can be compressed when it passes through the first ear plate, and the elastic locking tongue can extend and abut against the bottom of the first ear plate.

[0011] In some embodiments, the mating assembly further includes a guide post connected to the bottom of the first ear plate and a connecting cap slidably connected to the guide post, and the bottom of the elastic locking tongue is provided with a first guide portion; When the elastic locking tongue abuts against the bottom of the first ear plate, it is located between the connecting cap and the first ear plate; When the detachable piece moves downwards driven by an external force, the elastic locking tongue moves below the connecting cap and causes the connecting cap to move upwards under the action of the first guide portion, so that the elastic locking tongue moves out between the connecting cap and the first ear plate.

[0012] In some embodiments, the mating assembly further includes an elastic element, and the bottom of the connecting cap is provided with a second guide portion; When the elastic locking tongue is located between the connecting cap and the first ear plate, the end of the first hook abuts against the elastic element; When the elastic locking tongue moves out from between the connecting cap and the first ear plate, the first hook presses against the elastic element; The elastic element resets, and under the action of the second guide portion, the elastic locking tongue moves to above the first ear plate, and the first hook disengages from the first ear plate.

[0013] In some embodiments, the guardrail is further provided with a second ear plate, and the detachable piece is provided with a second hook. When the first hook is hooked into the hole of the first ear plate, the second hook is hooked into the hole of the second ear plate; when the first hook is detached from the first ear plate, the second hook is detached from the second ear plate.

[0014] The beneficial effects of this invention are: When erected, the detachable panels connect between two guardrails, forming a U-shaped structure that surrounds three sides of the opening, serving as a protective fence. The detachable panels are locked to the guardrails via a locking mechanism, further enhancing the stability of the U-shaped structure. When lowered, the detachable panels are removed, driving the guardrail to rotate around its pivot and first pin, causing it to fall towards the opening and cover it, preventing workers from falling through the edge and improving safety. Furthermore, by laying steel grating over the guardrail, it can serve as a pedestrian platform. The erected guardrails, with their pre-tensioned torsion springs, remain upright and do not tilt under gravity. When the guardrails are manually folded, the gravitational torque increases, causing the torsion springs to shift angularly and generate a corresponding counter-torque, acting on the second support. This counter-torque is almost equal to the gravitational torque, achieving torque balance. Therefore, operators only need a small amount of force to easily lower and erect the guardrails. The process of erecting and lowering the guardrail device only requires driving the guardrail to rotate and disassembling and installing the detachable panels. The operation is quick and labor-saving, and a single person can complete the task quickly and efficiently. This effectively ensures the safety of personnel on the lifting platform during work and is more adaptable to the rapid response requirements of helicopter take-off and landing. Attached Figure Description

[0015] Figure 1 This is a top view of the guardrail device described in an embodiment of the present invention; Figure 2 This is a side view of the guardrail device described in an embodiment of the present invention; Figure 3 This is a side view of the guardrail device described in the embodiment of the present invention in its collapsed state; Figure 4This is a front view of the assist mechanism described in an embodiment of the present invention; Figure 5 This is a side view of the assist mechanism described in an embodiment of the present invention; Figure 6 This is a top view of the assist mechanism described in an embodiment of the present invention; Figure 7 This is a front view of the guardrail device described in an embodiment of the present invention; Figure 8 yes Figure 7 Enlarged view of point I; Figure 9 This is one of the schematic diagrams of the locking mechanism before locking according to an embodiment of the present invention; Figure 10 This is a second schematic diagram of the locking mechanism before locking, as described in an embodiment of the present invention; Figure 11 This is a schematic diagram of the locking state of the locking mechanism described in an embodiment of the present invention; Figure 12 This is one of the schematic diagrams of unlocking the locking mechanism described in the embodiments of the present invention; Figure 13 This is a second schematic diagram of the unlocking process of the locking mechanism described in the embodiment of the present invention; Figure 14 This is the third schematic diagram of the unlocking process of the locking mechanism described in the embodiment of the present invention.

[0016] In the picture: 1. Guardrail; 11. First base; 12. Second base; 13. Second ear plate; 14. Guardrail post; 2. Power assist mechanism; 21. First pin; 22. Torsion spring; 23. Positioning pin; 24. Stop pin; 3. Second pin; 4. Detachable body; 41. Second hook; 5. Locking mechanism; 51. Locking assembly; 511. First hook; 512. Resilient bolt; 513. First guide; 52. Mating assembly; 521. First lug; 522. Guide post; 523. Connecting cap; 524. Second guide; 525. Elastic element; 61. First support; 62. Second support; 621. Flange; 7. Shaft; 8. Opening. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0019] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 14As shown, the present invention provides a guardrail device for a ship's helicopter landing platform, located at the opening 8 of the landing platform. The landing platform has two support assemblies along a first direction. Each support assembly includes two first supports 61 spaced apart along a second direction and a second support 62 located between the two first supports 61. The first and second directions are angled together, and both directions are perpendicular to the vertical direction. Specifically, the angle between them is determined according to the shape of the opening 8, such as 90°. The guardrail device includes an assist mechanism 2, a detachable piece 4, and two guardrails 1. The two guardrails 1 are correspondingly arranged with the two support assemblies. Each guardrail 1 has a first base 11 at both ends and a second base 12 in the middle. The two first bases 11 correspond to the two first supports 61, and the first supports 61 and the first bases 11 are rotatable around a pivot 7. The assist mechanism 2 includes a first pin 21 and a torsion spring 22. The first pin 21 passes through the second base 12 and the second support 62 along the second direction. The first pin 21 and the rotating shaft 7 are coaxially arranged. The torsion spring 22 is sleeved on the first pin 21, and its two ends are fixed to the base and the first pin 21 respectively. The second support 62 is provided with a flange 621. The torsion arm of the torsion spring 22 abuts against the side of the flange 621. The preload of the torsion spring 22 makes the guardrail 1 stand upright. An external force drives the guardrail 1 to rotate around the first pin 21 in a direction away from the flange 621, so that the guardrail 1 falls down toward the opening 8. The detachable piece 4 is located between the two guardrails 1 and is locked to the guardrail 1 by a locking mechanism 5.

[0022] The bottom of the guardrail 1 is sequentially provided with a first base 11, a second base 12, and another first base 11 along the second direction. The support assembly of the lifting platform includes a first support 61, a second support 62, and another first support 61 sequentially provided along the second direction. The two first bases 11 and the two first supports 61 are connected by a pivot 7, and the second base 12 and the second support 62 are connected by a first pin 21. Since the pivot 7 and the first pin 21 are coaxial, when the guardrail is erected, the detachable piece 4 is connected between the two guardrails 1, forming a U-shaped structure that surrounds the three sides of the opening 8, serving as a fence at the opening 8 and providing protection. Furthermore, the detachable piece 4 is locked to the guardrail 1 by a locking mechanism 5, further improving the stability of the U-shaped structure. When the guardrail is lowered, the detachable piece 4 is removed, driving the guardrail 1 to rotate around the pivot 7 and the first pin 21, causing the guardrail 1 to fall towards the opening 8 and cover the opening 8, preventing workers working at the edge of the opening from falling off and improving safety.

[0023] Furthermore, by laying steel grating on the guardrail 1, it can serve as a platform for pedestrian access. Furthermore, the guardrail 1 is equipped with railing posts 14, and a second base 12 is installed at the bottom of the railing posts 14.

[0024] The upright guardrail 1 is secured by a pre-tensioned torsion spring 22, ensuring it remains upright and does not tilt under gravity. When the guardrail 1 is manually folded, the gravitational torque increases, causing the torsion spring 22 to undergo angular displacement and generate a corresponding counter-torque. This counter-torque acts on the second support 62, almost equal to the gravitational torque, achieving torque balance. Therefore, operators only need a small amount of force to easily lower and erect the guardrail. The process of erecting and lowering the guardrail only requires rotating the guardrail 1 and disassembling and installing the detachable panel 4. The operation is quick and labor-saving, allowing a single person to complete the task quickly and efficiently, effectively ensuring the safety of personnel on the lifting platform during work, and better meeting the rapid response requirements of helicopter take-off and landing.

[0025] The assist mechanism 2 also includes a positioning pin 23, which passes through the first pin 21 and the second support 62 along the first direction. Specifically, the upper torsion arm of the torsion spring 22 contacts and limits the flange 621 of the second support 62. The pin is rotated using a wrench or other tools to align the positioning hole on the pin with the positioning hole of the second support 62, and the positioning pin 23 is inserted and locked, so that the torsion spring 22 generates a certain preload as designed to ensure that the guardrail is upright and will not tilt under gravity.

[0026] The assist mechanism 2 also includes a stop pin 24. The end of the first pin 21 is provided with a slot. The torsion arm of the torsion spring 22 is inserted into the slot. The stop pin 24 is inserted into the slot of the first pin 21 to limit the torsion arm and ensure that the torsion spring 22 is stably installed on the first pin 21.

[0027] like Figure 3 As shown, the two first pins 21 corresponding to the two guardrails 1 have different heights. When the two guardrails 1 are laid down, they are stacked, with the guardrail 1 corresponding to the lower-height first pin 21 located below the guardrail 1 corresponding to the higher-height first pin 21. The two guardrails 1 are stacked above the opening 8, further improving the reliability of blocking the opening 8. For example, Figure 3 In this configuration, the height of the first pin 21 of the left guardrail 1 is lower than the height of the first pin 21 of the right guardrail 1. The left guardrail 1 is laid down first, followed by the right guardrail 1, so that the left guardrail 1 is below and the right guardrail 1 is above. In other embodiments, the two guardrails 1 can also be laid flat above the opening 8, depending on the height of the guardrails 1 and the size of the opening 8.

[0028] The first support 61 and the first base 11 have two sets of mounting holes along the vertical direction. One set of mounting holes is used to install the second pin 3, and the other set of mounting holes is used to install the rotating shaft 7, restricting the rotation of the guardrail 1 and further ensuring the reliability of the guardrail 1's upright position and preventing it from tipping over. For example, the rotating shaft 7 is a bolt, with the shank of the bolt passing through the mounting hole and the other end connected by a nut, allowing the guardrail 1 to rotate around the shank of the bolt. The second pin 3 can be inserted into a locking tongue, ensuring that the second pin 3 can slip out and ensuring installation reliability. When uprighting is required, the second pin 3 is installed and the locking tongue is inserted; when lowering is required, the locking tongue and the second pin 3 are removed.

[0029] Two torsion springs 22 are provided, and the two torsion springs 22 are located on both sides of the first pin 21 located on the second base 12. By increasing the number of torsion springs 22, the reliability of the guardrail 1 is further improved.

[0030] The locking mechanism 5 includes a locking component 51 and a mating component 52. The locking component 51 is located on the detachable plate 4 and includes a first hook 511 and a resilient locking tongue 512. The mating component 52 is located on the guardrail 1 and includes a first ear plate 521. When the detachable plate 4 is installed downwards, the first hook 511 is hooked into the hole of the first ear plate 521. The resilient locking tongue 512 can be compressed when passing through the first ear plate 521, and it can extend and abut against the bottom of the first ear plate 521. Only when the resilient locking tongue 512 is pulled out from the bottom of the first ear plate 521 can the detachable plate 4 be disassembled from the guardrail 1. The locking of the guardrail 1 and the detachable plate 4 is achieved through the resilient locking tongue 512. During the downward installation of the detachable plate 4, the installation and locking of the guardrail 1 and the detachable plate 4 are realized, and the installation process is convenient. Optionally, the resilient locking tongue 512 includes a locking tongue block and a spring, with the locking tongue block connected to the detachable plate 4 by the spring.

[0031] The mating assembly 52 also includes a guide post 522 connected to the bottom of the first ear plate 521 and a connecting cap 523 slidably connected to the guide post 522. The bottom of the elastic locking tongue 512 is provided with a first guide portion 513. When the elastic locking tongue 512 abuts against the bottom of the first ear plate 521, it is located between the connecting cap 523 and the first ear plate 521. When an external force drives the detachable piece 4 to move downwards, under the action of the first guide portion 513, the elastic locking tongue 512 moves below the connecting cap 523, causing the connecting cap 523 to move upwards, thus moving the elastic locking tongue 512 out of the space between the connecting cap 523 and the first ear plate 521. By pressing down on the detachable piece 4, the connecting cap 523 exerts a reaction force on the first guide portion 513, realizing the extraction of the elastic locking tongue 512 from the bottom of the first ear plate 521, thereby unlocking the detachable piece 4 from the guardrail 1. The unlocking process is convenient. The elastic locking tongue 512 drives the connecting cap 523 to move upward, so that the connecting cap 523 contacts the first ear plate 521, preventing the elastic locking tongue 512 from passing through the gap between the connecting cap 523 and the first ear plate 521 when the detachable piece 4 is disassembled upward, thus preventing it from locking again.

[0032] The mating component 52 also includes an elastic element 525, and the bottom of the connecting cap 523 is provided with a second guide portion 524. When the elastic locking tongue 512 is located between the connecting cap 523 and the first ear plate 521, the end of the first hook 511 abuts against the elastic element 525. When the elastic locking tongue 512 moves out from between the connecting cap 523 and the first ear plate 521, the first hook 511 squeezes the elastic element 525. The elastic element 525 resets, and under the action of the second guide portion 524, the elastic locking tongue 512 moves above the first ear plate 521, and the first hook 511 disengages from the first ear plate 521. The reset of the elastic element 525 provides an upward elastic force to the detachable piece 4, assisting in the disassembly of the detachable piece 4, reducing the upward force required to disassemble the detachable piece 4, and making the disassembly process convenient. During the entire operation of erecting and lowering the guardrail device, the use of tools such as wrenches is reduced, greatly improving convenience and user satisfaction.

[0033] The guardrail 1 is also provided with a second ear plate 13, and the detachable piece 4 is provided with a second hook 41. When the first hook 511 is hooked into the hole of the first ear plate 521, the second hook 41 is hooked into the hole of the second ear plate 13; when the first hook 511 is detached from the first ear plate 521, the second hook 41 is detached from the second ear plate 13. By setting the second ear plate 13 and the second hook 41, the connection between the guardrail 1 and the detachable piece 4 is further increased, and the connection reliability is improved.

[0034] The steps for lowering the guardrail device are as follows: first, press down the detachable piece 4 to unlock it and then lift it up until it is separated from the guardrail 1; remove the locking tongues on the second pins 3 of the first supports 61 and the first base 11 on both sides of the guardrail 1; first lower the guardrail 1 corresponding to the first pin 21 at the lower height, then lower the guardrail 1 corresponding to the first pin 21 at the higher height, and place the detachable piece 4 on the guardrail 1.

[0035] The erection of the guardrail device includes the following steps: remove the detachable piece 4 placed on the guardrail 1, gently lift the two guardrails 1, install the second pin 3 on the first support 61 and the first base 11 on both sides of the guardrail 1, the guardrail 1 is reliably installed, and then install the detachable piece 4 on the guardrail 1.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A guardrail device for a ship's helicopter landing platform, characterized in that, Located at the opening (8) of the landing platform, the landing platform is provided with two support assemblies along a first direction. The support assembly includes two first supports (61) spaced apart along a second direction and a second support (62) located between the two first supports (61). The first direction and the second direction are arranged at an angle. The guardrail device includes: Two guardrails (1) are provided corresponding to the two support components. The guardrails (1) are provided with first bases (11) at both ends and second bases (12) in the middle. The two first bases (11) correspond to the two first supports (61). The first supports (61) and the first bases (11) can rotate around the pivot (7). The assist mechanism (2) includes a first pin (21) and a torsion spring (22). The first pin (21) passes through the second base (12) and the second support (62) along the second direction. The first pin (21) and the rotating shaft (7) are coaxially arranged. The torsion spring (22) is sleeved on the first pin (21) and its two ends are fixed to the second base (12) and the first pin (21) respectively. The torsion arm of the torsion spring (22) abuts against the side of the flange (621) of the second support (62). The preload of the torsion spring (22) makes the guardrail (1) stand upright. The external force drives the guardrail (1) to rotate around the first pin (21) in the direction away from the flange (621), so that the guardrail (1) falls down toward the opening (8). A detachable piece (4) is disposed between the two guardrails (1) and locked to the guardrails (1) by a locking mechanism (5); The locking mechanism (5) includes: A locking assembly (51) is provided on the detachable piece (4), the locking assembly (51) including a first hook (511) and a resilient locking tongue (512); A fitting component (52) is provided on the guardrail (1), and the fitting component (52) includes a first ear plate (521); When the detachable piece (4) is installed downwards, the first hook (511) is hung in the hole of the first ear plate (521), the elastic locking tongue (512) can be compressed when it passes through the first ear plate (521), and the elastic locking tongue (512) can extend out and abut against the bottom of the first ear plate (521). The mating assembly (52) further includes a guide post (522) connected to the bottom of the first ear plate (521) and a connecting cap (523) slidably connected to the guide post (522), and the bottom of the elastic locking tongue (512) is provided with a first guide portion (513). When the elastic locking tongue (512) abuts against the bottom of the first ear plate (521), it is located between the connecting cap (523) and the first ear plate (521); When the external force drives the detachable piece (4) to move downward, under the action of the first guide (513), the elastic locking tongue (512) moves downward toward the connecting cap (523) and causes the connecting cap (523) to move upward, so that the elastic locking tongue (512) moves out of the space between the connecting cap (523) and the first ear plate (521).

2. The guardrail device for a ship's helicopter landing platform according to claim 1, characterized in that, The two guardrails (1) have different heights corresponding to the two first pins (21). The two guardrails (1) are stacked after being laid down, and the guardrail (1) corresponding to the lower height first pin (21) is located below the guardrail (1) corresponding to the higher height first pin (21).

3. The guardrail device for a ship's helicopter landing platform according to claim 1, characterized in that, The first support (61) and the first base (11) are provided with two sets of mounting holes in the vertical direction. One set of mounting holes is used to install the second pin (3), and the other set of mounting holes is used to install the rotating shaft (7). The first direction and the second direction are both perpendicular to the vertical direction.

4. The guardrail device for a ship's helicopter landing platform according to claim 3, characterized in that, The second pin (3) can be inserted into a locking tongue, which allows the first support (61) and the first base (11) to abut against each other.

5. The guardrail device for a ship's helicopter landing platform according to claim 1, characterized in that, Two torsion springs (22) are provided, and the two torsion springs (22) are located on both sides of the first pin (21) on the second base (12).

6. The guardrail device for a ship's helicopter landing platform according to claim 1, characterized in that, The assist mechanism (2) also includes: A positioning pin (23) passes through the first pin (21) and the second support (62) along the first direction; and / or The stop pin (24) is provided with a slot at the end of the first pin (21), the torsion arm of the torsion spring (22) is inserted into the slot, and the stop pin (24) is inserted into the slot of the first pin (21) to limit the torsion arm.

7. The guardrail device for a ship's helicopter landing platform according to claim 1, characterized in that, The mating assembly (52) further includes an elastic element (525), and the bottom of the connecting cap (523) is provided with a second guide portion (524); When the elastic locking tongue (512) is located between the connecting cap (523) and the first ear plate (521), the end of the first hook (511) abuts against the elastic member (525); When the elastic locking tongue (512) moves out of the space between the connecting cap (523) and the first ear plate (521), the first hook (511) presses against the elastic element (525); The elastic element (525) is reset, and under the action of the second guide (524), the elastic locking tongue (512) moves to above the first ear plate (521), and the first hook (511) disengages from the first ear plate (521).

8. The guardrail device for a ship's helicopter landing platform according to claim 1, characterized in that, The guardrail (1) is also provided with a second ear plate (13), and the detachable piece (4) is provided with a second hook (41). When the first hook (511) is hooked into the hole of the first ear plate (521), the second hook (41) is hooked into the hole of the second ear plate (13); when the first hook (511) is detached from the first ear plate (521), the second hook (41) is detached from the second ear plate (13).

Images