Linkage type safety handrail for tank container

Abstract

The invention relates to the technical field of tank containers, in particular to a linkage type safety handrail for a tank container, which comprises a frame for fixing a tank body, and the frame comprises a top side beam, a bottom side beam and a side beam connected with the end part of the top side beam and the end part of the bottom side beam; the crawling ladder assembly is vertically arranged on the side beams and is used for operators to go up and down the container; the handrail assembly is rotationally installed on the top side beam and used for improving the safety of operators; the locking part is installed on the side face of the top side beam and used for locking the handrail assembly and preventing the handrail assembly from loosening during protection; the driving assembly is arranged in the top side beam and used for driving the handrail assembly to rotate, and the automatic safety handrail device greatly improves the safety and working efficiency of operators and solves multiple potential safety hazards in the prior art.

Description

Technical Field

[0001] This invention relates to the field of tank container technology, and more particularly to a linkage safety handrail for tank containers. Background Technology

[0002] In modern container operations, operators frequently need to work at heights, especially when loading, unloading, and inspecting goods on top of containers, where the working environment often presents certain hazards. To improve operator safety, many containers are equipped with foldable handrail systems to provide necessary protection. However, existing foldable handrail systems still have some significant safety hazards and operational inconveniences.

[0003] Firstly, existing handrail systems often require operators to manually rotate the handrail uprights from a lowered position to an upright position, or to lower them after work. This is especially problematic when operators are climbing to the top of a container, as the handrail uprights are lowered and offer no protection. In this situation, operators must manually operate the handrail to restore it to an upright position without any safety equipment. During this process, the lack of effective auxiliary devices poses a risk of falls, particularly in emergency situations where operators cannot complete the operation promptly and effectively.

[0004] Secondly, after the operation is completed, when the operator returns to the ground from the top of the container, the handrail usually needs to be manually lowered to make room. During this process, the operator loses safety protection again and may become fatigued from repeatedly operating the handrail, further increasing the safety risk. Frequent manual operation not only increases the difficulty and workload of the operation but may also lead to the handrail failing to be lowered or restored properly due to operator negligence, thus compromising the protective function.

[0005] Furthermore, in emergency situations such as sudden weather changes or operator discomfort, operators may not be able to operate the handrail system quickly and accurately, which poses a significant safety hazard to the existing foldable handrail design. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the background art by proposing a linkage safety handrail for tank containers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a linkage safety handrail for tank containers, comprising: A frame for securing the tank, the frame including a top side beam and a bottom side beam, and side beams connected to the ends of the top side beam and the bottom side beam; A ladder assembly is vertically mounted on the side beam for operators to access containers. The handrail assembly is rotatably mounted on the top side beam to improve operator safety; The locking component is installed on the side of the top beam. The locking component is used to lock the handrail assembly to prevent the handrail assembly from loosening when the guardrail is in place. The drive assembly, located inside the top side beam, is used to drive the rotation of the handrail assembly.

[0008] Preferably, the ladder assembly includes two climbing frames welded to the side beams, with multiple foot support rods fixedly connected between the two climbing frames. One of the foot support rods has an installation groove, and a pressure block is slidably installed in the installation groove. A connecting rod is connected to the side of the pressure block, and the connecting rod passes through the side wall of the climbing frame, with the other end of the connecting rod extending into the side beam. Both the climbing frame and the side beam have strip grooves for the connecting rod to move. A return spring is provided at the bottom of the installation groove, and the upper end of the return spring abuts against the pressure block.

[0009] Preferably, the handrail assembly includes a fixing plate fixedly connected to the side of the top side beam, a bushing fixedly connected to the side of the fixing plate, a clearance groove formed on the circumferential surface of the bushing, a rotating shaft rotatably connected inside the bushing, a handrail vertical rod fixedly connected to the rotating shaft, the handrail vertical rod passing through the clearance groove, one end of the rotating shaft near the top side beam passing through the fixing plate, and a gear fixedly connected to the end of the rotating shaft.

[0010] Preferably, the locking component includes a fixing sleeve fixedly connected to the side of the top beam, the fixing sleeve having an opening groove, and a fixing pin slidably inserted into the fixing sleeve. The outer end of the fixing pin is provided with a wedge-shaped surface, and a limiting groove is provided on the fixing pin. The limiting groove of the fixing pin is used to lock the vertical handrail in a vertical state. The inner end of the fixing pin is provided with a spring groove, and a spring is installed in the spring groove. One end of the spring abuts against the inner bottom of the spring groove. A top rod is also fixedly installed in the spring groove. The side of the top beam is provided with an opening that communicates with the fixing sleeve. An annular spring seat is provided in the opening, and the other end of the spring abuts against the annular spring seat. When the handrail vertical bar is rotated to make it vertical, the handrail vertical bar presses against the wedge-shaped surface, and the fixing pin moves inward, so that the handrail vertical bar is locked in the limiting groove. Through the elastic force of the spring, the fixing pin is reset, thereby restricting the handrail vertical bar in the limiting groove to lock it and prevent it from tipping over.

[0011] Preferably, the drive assembly includes a limiting slide rail disposed on the inner top wall of the top side beam, a slide rail slidably connected in the limiting slide rail, a rack disposed below the slide rail, a strip-shaped hole opened below the top side beam, a gear disposed directly below the rack, the gear meshing with the rack, a traction rope connected to one end of the rack, the traction rope passing through the top side beam and extending into the interior of the side beam, and the other end of the traction rope being fixedly connected to a connecting rod; When the pressure block is stepped on, the pressure block drives the connecting rod, which in turn drives the rack through the traction rope at one end of the connecting rod, thereby driving the gear to rotate and causing the handrail vertical bar to rotate. A fixed pulley is also installed inside the top side beam, and the traction rope passes through the fixed pulley.

[0012] Preferably, the inner wall of the top side beam is also equipped with a reset mechanism for resetting the handrail vertical bar. The reset mechanism includes a hydraulic damper installed inside the top side beam. One end of the hydraulic damper is installed on the inner wall of the top side beam via a mounting shaft, and the telescopic end of the hydraulic damper is connected to one end of a rack.

[0013] Preferably, a push-pull rod is connected to the top rod, and the push-pull rod is provided with a bent section.

[0014] Preferably, the top wall of the top side beam and the limiting slide are provided with interconnected T-shaped grooves, a locking paddle is rotatably installed in the T-shaped groove, and a positioning groove matching the locking paddle is provided on the side of the rack.

[0015] Preferably, the locking lever includes a long section and a short section arranged opposite to each other. The long section is engaged in the positioning groove, and the short section is provided with a protrusion that corresponds to the bent section on the push-pull rod.

[0016] Compared with existing technologies, the advantages of the linked safety handrail originally designed for tank containers are: 1. The handrail rotation mechanism of this application significantly improves operational safety. In traditional designs, operators need to manually operate the handrail without protection, posing a serious risk of fall. This design, through a drive mechanism linked to the ladder assembly, achieves automatic raising and locking of the handrail, ensuring that operators remain protected throughout the entire container loading and unloading process. This not only eliminates safety hazards caused by improper manual operation or negligence but also provides a guarantee for rapid protection in emergency situations.

[0017] 2. This application significantly simplifies the operation process and greatly reduces the difficulty of operation. Traditional designs require operators to perform multiple manual operations on top of the container, which not only increases workload but also makes it easy to overlook safety details due to repetitive actions. This design, through an innovative linkage mechanism, allows operators to automatically drive the handrail to rotate and lock simply by stepping on the ladder, eliminating the need for additional manual operation. This not only significantly reduces the labor intensity of operators but also reduces the risks caused by operational errors. The simplified operation process also improves work efficiency, further enhancing overall work quality and safety.

[0018] 3. This application can meet the needs of various types of containers and different operating environments. It can be customized according to specific circumstances and is applicable to various scenarios such as standard containers, special purpose containers (such as liquid transport or dangerous goods containers), and oversized containers. It can be installed on one or both sides of the container as needed to provide unidirectional or all-round protection, which greatly improves the practical value and market potential of this application.

[0019] 4. The reset mechanism design in this application significantly extends the service life of the handrail assembly. In traditional designs, the handrail often experiences hard contact during the lowering process, which not only generates noise but may also damage the handrail and pivot. This design uses a hydraulic damper as the reset mechanism, achieving a slow and smooth lowering of the handrail. The hydraulic damper provides continuous damping force, allowing the handrail to return to its original position slowly and smoothly, effectively avoiding hard contact and collisions. This not only reduces equipment wear and extends its service life but also improves overall stability and user experience.

[0020] 5. The dual locking mechanism of this application significantly improves the stability and safety of the handrail. Firstly, the locking pin in the locking component engages with the handrail's vertical bar, achieving initial locking in the vertical position. Secondly, the designed locking lever cooperates with the positioning groove on the rack, providing a second layer of locking protection. This dual locking mechanism applies not only to the vertical position of the handrail but also locks it in the folded-down position, ensuring the handrail is securely fixed in both different usage states. This greatly enhances the reliability of the device, effectively preventing accidental movement of the handrail due to external forces or vibrations, and providing operators with a safer and more stable working environment.

[0021] 6. This application improves the convenience and safety of operation. In traditional designs, operators need to manually lower the handrails on top of the container before descending from the tank. Walking after lowering the handrails presents a safety hazard. This application achieves automatic folding and lowering of the handrails through a push-pull rod mechanism. Operators only need to simply move the push-pull rod during container descent to trigger the automatic folding of the handrails, eliminating the need for manual pulling. This not only greatly simplifies the operation process but also ensures that operators maintain a safe posture throughout the entire descent. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the vertical structure of the handrail assembly of the present invention; Figure 3 This is a cross-sectional view of the ladder assembly of the present invention; Figure 4 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 5 This is the invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the internal structure of the locking component of the present invention; Figure 7 This is the invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the locking lever in this invention; Figure 9 This is a three-dimensional structural diagram of the locking component in this invention; Figure 10 This is a schematic diagram of the locking component in this invention; Figure 11 This is a schematic diagram of the internal structure of the rack of the present invention; Figure 12 This is the invention Figure 11 Enlarged structural diagram at point C; Figure 13 This is a schematic diagram of the top partial structure in this invention; Figure 14 This is the invention Figure 13 Enlarged structural diagram at point D.

[0023] In the diagram: 100, frame; 110, top side beam; 111, opening; 112, annular spring seat; 113, strip hole; 114, T-slot; 120, bottom side beam; 130, side beam; 200, ladder assembly; 210, climbing frame; 211, strip slot; 220, foot support rod; 221, mounting slot; 222, lower pressure block; 223, connecting rod; 224, return spring; 300, handrail assembly; 310, fixing plate; 320, bushing; 321, clearance slot; 330, pivot; 340, handrail vertical bar; 350, gear; 4 00. Drive assembly; 410. Limiting slide; 420. Slide rail; 430. Rack; 431. Positioning groove; 440. Traction rope; 450. Fixed pulley; 460. Reset mechanism; 461. Hydraulic damper; 500. Locking component; 510. Fixing sleeve; 511. Opening groove; 520. Fixing pin; 521. Wedge cut; 522. Limiting groove; 523. Spring groove; 524. Spring; 525. Top rod; 600. Push-pull rod; 601. Bending section; 700. Locking lever; 701. Long section; 702. Short section; 703. Protrusion. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Example

[0026] The existing foldable handrail design has serious safety hazards, mainly in several aspects of the operation process. First, when the operator climbs the frame, the handrail is in a collapsed state and cannot provide protection. Once the operator reaches the top, they need to rotate the handrail to support it without any protection, which carries the risk of falling.

[0027] Similarly, when preparing to descend from the container after completing top work, operators must first lower the guardrail, losing safety protection again, and then descend via the ladder. Frequent guardrail operations not only increase workload and fatigue risk but may also cause operators to overlook safety details due to repetitive actions. In emergencies, such as sudden weather changes or physical discomfort, operators may not have sufficient time or ability to operate the guardrail correctly, posing a safety hazard.

[0028] To address the aforementioned problems, this application provides a linked safety handrail for tank containers, referring to... Figure 1 and Figure 2 The frame 100 for fixing the tank includes a top side beam 110 and a bottom side beam 120, and a side beam 130 connected to the ends of the top side beam 110 and the bottom side beam 120. The frame is made of high-strength steel to ensure the stability and durability of the overall structure and form a stable outer skeleton structure. The ladder assembly 200 is vertically mounted on the side beam 130 and is used by operators to get on and off the container. The handrail assembly 300 is rotatably mounted on the top side beam 110 to improve the safety of the operator; Locking component 500 is installed on the side of top side beam 110. Locking component 500 is used to lock handrail assembly 300 to prevent handrail assembly 300 from loosening when providing protection. The drive assembly 400 is located inside the top side beam 110 and is used to drive the rotation of the handrail assembly 300. The ladder assembly 200 provides driving force to the drive assembly 400.

[0029] In use, the operator climbs onto the ladder assembly 200 and steps on the ladder to make the ladder assembly 200 drive the drive assembly 400 to rotate. The drive assembly 400 drives the handrail assembly 300 to rotate to a vertical position through the transmission structure, forming a safety protection at the top.

[0030] When the handrail assembly 300 rotates to the vertical position, the locking component 500 automatically engages, ensuring the handrail remains secure and providing comprehensive safety protection. After completing the work at the top, the operator descends via the ladder assembly 200, and the drive assembly 400 then returns the handrail assembly 300 to its reclining position, disengaging the safety protection.

[0031] Operators no longer need to perform manual operations at the top, reducing the risk of falls due to improper operation and significantly improving safety. It also reduces the need for operators to perform multiple manual operations, especially in emergency situations. The automated operation greatly reduces the workload and fatigue of operators and reduces the risk of employees with weak awareness of safety precautions not operating the handrails in order to save time and effort, which poses a safety hazard.

[0032] To further address the safety hazards in this embodiment, refer to... Figure 3 and Figure 14 This embodiment further discloses that: the climbing ladder assembly 200 includes two climbing frames 210 welded to the side beam 130, and a plurality of foot support rods 220 are fixedly connected between the two climbing frames 210. One of the foot support rods 220 has an installation groove 221, and a lower pressure block 222 is slidably installed in the installation groove 221. A connecting rod 223 is connected to the side of the lower pressure block 222. The connecting rod 223 passes through the side wall of the climbing frame 210, and the other end of the connecting rod 223 extends into the side beam 130. The sides of the climbing frame 210 and the side beam 130 are provided with strip grooves 211 for the connecting rod 223 to move. A return spring 224 is provided at the bottom of the installation groove 221. The upper end of the return spring 224 abuts against the lower pressure block 222. The design of the climbing ladder assembly 200 ensures that the operator can not only obtain stable support when climbing up and down the container, but also generate enough power to start the drive assembly 400 by stepping.

[0033] The handrail assembly 300 includes a fixing plate 310 fixedly connected to the side of the top side beam 110. A bushing 320 is fixedly connected to the side of the fixing plate 310. A clearance groove 321 is provided on the circumferential surface of the bushing 320. A rotating shaft 330 is rotatably connected inside the bushing 320. A handrail vertical rod 340 is fixedly connected to the rotating shaft 330. The handrail vertical rod 340 passes through the clearance groove 321. One end of the rotating shaft 330 near the top side beam 110 passes through the fixing plate 310, and a gear 350 is fixedly connected to the end of the rotating shaft 330.

[0034] The locking component 500 includes a fixing sleeve 510 fixedly connected to the side of the top beam 110. An opening slot 511 is provided on the fixing sleeve 510, and a fixing pin 520 is slidably inserted into the fixing sleeve 510. The outer end of the fixing pin 520 is provided with a wedge-shaped surface 521, and a limiting groove 522 is provided on the fixing pin 520. The limiting groove 522 of the fixing pin 520 is used to lock the vertical handrail 340 in a vertical state. The inner end of the fixing pin 520 is provided with a spring groove 523, and a spring 524 is installed in the spring groove 523. One end of the spring 524 abuts against the inner bottom of the spring groove 523. A top rod 525 is also fixedly installed in the spring groove 523. The side of the top side beam 110 is provided with an opening 111 that communicates with the fixing sleeve 510. An annular spring seat 112 is provided in the opening 111, and the other end of the spring 524 abuts against the annular spring seat 112. When the handrail vertical bar 340 is rotated to make it vertical, the handrail vertical bar 340 presses against the wedge-shaped surface 521, and the fixing pin 520 moves inward, so that the handrail vertical bar 340 is locked in the limiting groove 522. Through the elastic force of the spring 524, the fixing pin 520 is reset, thereby restricting the handrail vertical bar 340 in the limiting groove 522 to achieve locking and prevent tipping.

[0035] The drive assembly 400 includes a limiting slide 410 disposed on the inner top wall of the top side beam 110, a slide rail 420 slidably connected in the limiting slide 410, a rack 430 disposed below the slide rail 420, a strip hole 113 opened below the top side beam 110, a gear 350 disposed directly below the rack 430, the gear 350 meshing with the rack 430, one end of the rack 430 being connected to a traction rope 440, the traction rope 440 passing through the top side beam 110 and extending into the interior of the side beam 130, and the other end of the traction rope 440 being fixedly connected to a connecting rod 223. When the pressure block 222 is stepped on, the pressure block 222 drives the connecting rod 223, which in turn drives the rack 430 to move through the traction rope 440 at one end of the connecting rod 223, thereby driving the gear 350 to rotate and causing the handrail vertical bar 340 to rotate. A fixed pulley 450 is also installed inside the top side beam 110, and the traction rope 440 passes through the fixed pulley 450.

[0036] In specific operation, when the operator needs to climb onto the container to work, when the operator steps on the support rod 220, the pressure block 222 will compress downward, causing the connecting rod 223 to slide along the strip groove 211. The connecting rod 223 pulls the slide rail 420 through the traction rope 440, causing the rack 430 to move in translation. The rack 430 drives the handrail assembly 300 to rotate through the gear 350.

[0037] Under the action of the drive assembly 400, the handrail assembly 300 gradually rotates to the vertical position. When the handrail assembly 300 is fully rotated to the vertical position, the handrail vertical bar 340 is locked by the snap-fit ​​relationship with the fixing pin 520. When the handrail vertical bar 340 rotates, it first contacts the wedge-shaped surface 521 of the fixing pin 520, pressing the wedge-shaped surface 521 and causing the fixing pin 520 to move inward. Then, the handrail vertical bar 340 is locked in the limiting groove 522. The fixing pin 520 of the locking component 500 is reset by the action of the spring 524, locking the handrail vertical bar 340 and ensuring that the handrail vertical bar 340 is firmly kept in the vertical position, providing a stable protective function.

[0038] In this embodiment, the transmission parameters of the drive assembly 400 are set as follows: the pitch circle diameter of the gear 350 matches the maximum sliding stroke, i.e., the effective pedaling stroke, of the lower pressure block 222 within the mounting groove 221. Specifically, when the operator steps on the pedal support rod 220 with the lower pressure block 222 and presses down to the bottom, the lower pressure block 222 pulls the rack 430 a linear distance via the traction rope 440, which precisely drives the gear 350 to complete the entire rotation stroke of the handrail vertical rod 340 from the horizontally reclining state to the 90-degree vertical state.

[0039] This single-stroke, full-motion design avoids the problems of discontinuous drive or handrail shaking that may be caused by multi-stage, intermittent pedaling. Meanwhile, during the raising of the handrail vertical bar 340, the handrail's own weight torque or the counterforce of the hydraulic damper 461 (as described in the instruction manual) keeps the traction rope 440 taut, ensuring smooth meshing of the rack 430 and gear 350 and eliminating swaying caused by movement gaps.

[0040] In this application, the automatic handrail assembly 300's rotation mechanism ensures that operators are always adequately protected during container loading and unloading, reducing the risk of falls due to negligence. The entire system is driven by stepping motions on the ladder assembly 200, eliminating the need for manual handrail operation and significantly reducing operator workload. Due to the automatic rotation and locking mechanism of the handrail vertical bar 340, operators no longer need to perform multiple manual operations, reducing preparation time, improving work efficiency, and greatly enhancing safety.

[0041] This device can be used in different container types and operating environments. It can be installed on one side or both sides of the container, and it can adapt to the needs of different scenarios, including standard containers, special purpose containers, and oversized containers. The handrail device can be customized and installed according to different container shapes. Specifically: Unilateral installation: For standard containers, handrails can be installed on one side of the container (such as the top side or one side of the container) to provide one-way protection. This effectively improves operator safety without taking up too much space.

[0042] Side-mounted: For special scenarios requiring two-way protection, such as high-wind-speed areas, large equipment containers, or situations requiring work at height on both sides, handrails can be installed on both sides of the container simultaneously, forming all-around safety protection. This provides stronger safety assurance and prevents operators from falling due to loss of balance or external forces.

[0043] Special purpose containers: such as liquid transport containers and dangerous goods containers, require more meticulous and specialized protection for operators. This handrail device can be customized in size and installation method according to the specific needs of the container, ensuring that operators are always in a safe condition during operations.

[0044] Example 2: After the operator completes their work on top of the container tank, they need to descend from the top of the container. To further improve safety, this example is implemented based on Example 1 above. Please refer to [link / reference]. Figure 4 and Figure 14The inner wall of the top side beam 110 is also equipped with a reset mechanism 460 for resetting the handrail vertical bar 340. The reset mechanism 460 includes a hydraulic damper 461 installed inside the top side beam 110. One end of the hydraulic damper 461 is installed on the inner wall of the top side beam 110 through a mounting shaft. The telescopic end of the hydraulic damper 461 is connected to one end of the rack 430.

[0045] In existing technologies, the handrail vertical bar 340 typically makes a hard contact during the lowering process, resulting in a loud "bang" sound. Prolonged use can damage the handrail vertical bar 340 or the pivot 330, potentially affecting safe use. Therefore, the reset mechanism 460 in this embodiment uses a hydraulic damper 461 to buffer the lowering process of the handrail vertical bar 340, thereby avoiding hard contact and the loud "bang" sound. Specifically, the hydraulic damper 461 provides continuous damping force when the handrail vertical bar 340 is lowered, allowing it to return to its original position slowly and smoothly.

[0046] The hydraulic damper 461 works on a similar principle to a hinge with hydraulic pressure, which is a mature technology. The specific principle will not be elaborated here. The hydraulic damper 461 not only improves the service life of the handrail vertical bar 340, but also effectively reduces the safety hazards caused by excessive impact, and enhances the overall stability of the equipment and the user experience.

[0047] In addition, a push-pull rod 600 is connected to the top rod 525, and the push-pull rod 600 is equipped with a bending section 601, which realizes the automatic folding and lowering function of the handrail vertical rod 340. Specifically, when the operator needs to get off the container, there is no need to manually lower the handrail vertical rod 340; the process can be completed with a simple operation.

[0048] When the operator descends from the climbing frame 210 and steps on two or three support rods 220, one hand holds the climbing frame 210 while the other hand moves the push-pull rod 600. The movement of the push-pull rod 600 causes the top rod 525 to move, which in turn causes the fixing pin 520 to shift. Since the fixing pin 520 no longer restricts the handrail vertical rod 340, applying an external force causes the handrail vertical rod 340 to move out of the limiting groove 522 of the fixing pin 520. The handrail vertical rod 340 can then automatically rotate and fold under gravity, easily completing the lowering process. In this application, the operator only needs to move the push-pull rod 600 during the container lowering process to achieve automatic folding of the handrail vertical rod 340, without first manually pulling or releasing the handrail vertical rod 340 to fold it before descending, greatly improving safety.

[0049] In this application, a T-shaped groove 114 is provided on the top wall of the top side beam 110 and the limiting slide 410, which are interconnected. A locking paddle 700 is rotatably installed in the T-shaped groove 114. A positioning groove 431 matching the locking paddle 700 is provided on the side of the rack 430. Two sets of positioning grooves 431 are provided, one for locking the handrail vertical bar 340 in the vertical state and the other for locking in the folded state.

[0050] The locking lever 700 includes a long section 701 and a short section 702 arranged opposite to each other. The long section 701 is engaged in the positioning groove 431. The short section 702 is provided with a protrusion 703, and the protrusion 703 corresponds to the bent section 601 on the push-pull rod 600. A tension spring is connected to the short section 702, so that the long section 701 of the locking lever 700 always tends to move towards the rack 430. When the rack 430 moves to the position, one end of the long section 701 can be engaged in the positioning groove 431 to further position the rack 430, thereby further locking the handrail vertical rod 340.

[0051] It should also be noted that when the handrail upright 340 needs to be lowered, when the push-pull rod 600 is moved, the bent section of the push-pull rod 600 contacts the short section 702 of the locking lever 700. The compressive force causes the locking lever 700 to rotate, and the long section 701 moves out of the positioning groove 431, thereby releasing the locking relationship between the rack 430 and the locking lever 700. This allows the rack 430 to move freely and release the lock on the handrail upright 340. The locking lever 700, through the positioning groove 431 that cooperates with the rack 430, ensures that the handrail upright 340 is stably and safely locked in the desired position when it needs to be kept upright or lowered. The dual design of the positioning groove 431—one locking the upright state and one locking the lowered state—ensures that the handrail upright 340 can be firmly fixed in both different usage states.

[0052] The detailed dynamic process of locking and unlocking is as follows: Initial downed state: When the handrail is in the reclined position, the long section 701 of the locking lever 700 engages with one of the pre-set recline positioning grooves 431 on the rack 430. At this time, the handrail is locked in a horizontal position to prevent it from bouncing up due to vibration during transportation.

[0053] Lifting process: When the operator steps on the pressure block 222 to apply driving force, the traction rope 440 pulls the rack 430 to move forcibly. This initial driving force overcomes the spring resistance of the locking lever 700, causing the long segment 701 to be squeezed out of the reclining positioning groove and disengaged. Subsequently, as the rack 430 continues to move, the end of the long segment 701 of the locking lever 700 slides against the smooth side between the two sets of positioning grooves of the rack 430, at which point the lever is in a lifted standby state.

[0054] Vertical locking state: When the rack 430 moves to its end point of travel, i.e., when the handrail is fully upright, the vertical positioning groove on the rack 430, i.e., another set of positioning grooves 431, moves precisely to the position opposite to the locking lever 700. Under the action of its own spring, the long section 701 of the locking lever 700 quickly springs into the positioning groove, locking the rack 430 and preventing it from retracting, thereby firmly locking the handrail in a vertical and safe state.

[0055] Unlocking and resetting process: When the handrail needs to be retracted, the operator moves the push-pull lever 600. The bent section 601 on the push-pull lever contacts and presses against the protrusion 703 on the short section 702 of the locking lever 700, using the lever principle to force the locking lever 700 to rotate, causing its long section 701 to lift out of the vertical positioning groove. At this time, the rack 430 is unrestrained and moves in the opposite direction under the weight of the handrail or the action of the reset mechanism until the handrail is completely lowered. The long section 701 then falls back into the lowering positioning groove, completing the cycle.

[0056] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A linkage-type safety handrail for tank containers, characterized in that, include: A frame (100) for fixing the tank body, the frame (100) includes a top side beam (110) and a bottom side beam (120), and a side beam (130) connected to the ends of the top side beam (110) and the bottom side beam (120). A ladder assembly (200) is vertically mounted on the side beam (130) for operators to access containers; The climbing ladder assembly (200) includes two climbing frames (210) welded to the side beam (130). A plurality of foot support rods (220) are fixedly connected between the two climbing frames (210). One of the foot support rods (220) has an installation groove (221). A pressure block (222) is slidably installed in the installation groove (221). A connecting rod (223) is connected to the side of the pressure block (222). A traction rope (440) is connected to the connecting rod (223). Handrail assembly (300), rotatably mounted on top side beam (110), is used to improve operator safety; The handrail assembly (300) includes a fixing plate (310) fixedly connected to the side of the top side beam (110). A bushing (320) is fixedly connected to the side of the fixing plate (310). A clearance groove (321) is provided on the circumferential surface of the bushing (320). A rotating shaft (330) is rotatably connected inside the bushing (320). A handrail vertical rod (340) is fixedly connected to the rotating shaft (330). The handrail vertical rod (340) passes through the clearance groove (321). One end of the rotating shaft (330) near the top side beam (110) passes through the fixing plate (310). A gear (350) is fixedly connected to the end of the rotating shaft (330). A locking component (500) is installed on the side of the top side beam (110). The locking component (500) is used to lock the handrail assembly (300) to prevent the handrail assembly (300) from loosening when it is in the protection position. The drive assembly (400) is located inside the top side beam (110) and is used to drive the rotation of the handrail assembly (300). The operator provides driving force to the drive assembly (400) through the ladder assembly (200). The drive assembly (400) includes a limiting slide (410) disposed on the inner top wall of the top side beam (110), a slide rail (420) slidably connected in the limiting slide (410), and a rack (430) disposed below the slide rail (420); the gear (350) meshes with the rack (430), one end of the rack (430) is connected to the other end of the traction rope (440), and the traction rope (440) extends through the top side beam (110) to the interior of the side beam (130); When the pressure block (222) is stepped on, the pressure block (222) drives the connecting rod (223), and the traction rope (440) at one end of the connecting rod (223) drives the rack (430) to move, thereby driving the gear (350) to rotate, and causing the handrail vertical bar (340) to rotate.

2. The linked safety handrail for tank containers according to claim 1, characterized in that: The connecting rod (223) passes through the side wall of the climbing frame (210), and the other end of the connecting rod (223) extends into the side beam (130). The sides of the climbing frame (210) and the side beam (130) are provided with strip grooves (211) for the connecting rod (223) to move. A return spring (224) is provided at the bottom of the mounting groove (221), and the upper end of the return spring (224) abuts against the lower pressure block (222).

3. A linkage safety handrail for tank containers according to claim 2, characterized in that: The locking component (500) includes a fixing sleeve (510) fixedly connected to the side of the top side beam (110), the fixing sleeve (510) having an opening groove (511), and a fixing pin (520) slidably inserted into the fixing sleeve (510). The outer end of the fixing pin (520) is provided with a wedge-shaped surface (521), and a limiting groove (522) is provided on the fixing pin (520). The limiting groove (522) of the fixing pin (520) is used to lock the vertical handrail (340) in a vertical state. The inner end of the fixing pin (520) is provided with a spring groove (523). A spring (524) is installed in the spring groove (523). One end of the spring (524) abuts against the inner bottom of the spring groove (523). A top rod (525) is also fixedly installed in the spring groove (523). The side of the top side beam (110) is provided with an opening (111) that communicates with the fixing sleeve (510). An annular spring seat (112) is provided in the opening (111), and the other end of the spring (524) abuts against the annular spring seat (112). When the handrail vertical bar (340) is rotated to make the handrail vertical bar (340) vertical, the handrail vertical bar (340) presses against the wedge cut surface (521), and the fixing pin (520) moves inward, so that the handrail vertical bar (340) is locked in the limiting groove (522). Through the elastic force of the spring (524), the fixing pin (520) is reset, thereby restricting the handrail vertical bar (340) in the limiting groove (522) to achieve locking and prevent tipping.

4. A linkage safety handrail for tank containers according to claim 3, characterized in that: A strip-shaped hole (113) is provided below the top side beam (110), the gear (350) is located directly below the rack (430), and a fixed pulley (450) is also installed inside the top side beam (110), and the traction rope (440) passes through the fixed pulley (450).

5. A linkage safety handrail for tank containers according to claim 4, characterized in that: The inner wall of the top side beam (110) is also equipped with a reset mechanism (460) for resetting the handrail vertical bar (340). The reset mechanism (460) includes a hydraulic damper (461) installed inside the top side beam (110). One end of the hydraulic damper (461) is installed on the inner wall of the top side beam (110) through a mounting shaft. The telescopic end of the hydraulic damper (461) is connected to one end of the rack (430).

6. A linkage safety handrail for tank containers according to claim 5, characterized in that: A push-pull rod (600) is connected to the top rod (525), and a bent section (601) is provided on the push-pull rod (600).

7. A linkage safety handrail for tank containers according to claim 6, characterized in that: The top wall of the top side beam (110) and the limiting slide (410) are provided with interconnected T-shaped grooves (114), and a locking paddle (700) is rotatably installed in the T-shaped groove (114). The side of the rack (430) is provided with a positioning groove (431) that matches the locking paddle (700).

8. A linkage safety handrail for tank containers according to claim 7, characterized in that: The locking lever (700) includes a long section (701) and a short section (702) arranged opposite to each other. The long section (701) is engaged in the positioning groove (431). The short section (702) is provided with a protrusion (703), and the protrusion (703) corresponds to the bent section (601) on the push-pull rod (600).

Images