Portable folding ladder stand device

Abstract

The utility model discloses a portable folding ladder stand device, which belongs to the technical field of tank car ladder stands and comprises two parallel vertical support rods, and a preset number of transverse support rods are arranged between the vertical support rods at intervals along the longitudinal direction of the vertical support rods; the two ends of the transverse supporting rod are hinged to the vertical supporting rods. Outer edge platforms are arranged at the upper ends of the vertical supporting rods correspondingly, and clamping assemblies clamped to the top of the tank body are rotationally arranged on the lower end faces of the outer edge platforms through rotating shafts. The portable folding ladder stand device has the advantages that workers can use the portable folding ladder stand device outside and inside the tank body, the portable folding ladder stand device can be connected with a guardrail and a manhole cover at the top of the tank body in a clamped mode through the clamping assemblies, installation and welding of a plurality of ladder stands of the tank car are reduced, welding operation is avoided, and the working efficiency is improved. The service life of the tank car is prolonged.

Description

Technical field:

[0001] The utility model belongs to the technical field of tank truck ladders, and more specifically relates to a portable folding ladder device. Background technology:

[0002] Ladders are an indispensable and important equipment in the field of tank trucks, especially tank trucks with manhole covers and guardrails on the top. Ladders can facilitate workers to climb to the top of the tank to load and unload materials or enter the tank for maintenance and cleaning, thereby improving work efficiency. However, most of the existing ladders are fixed ladders. When the vehicle is parked, unrelated personnel often climb onto the roof through the ladder, which can easily lead to dangerous accidents; fixed ladders are installed on the outside of the tank, which have complex processes, large welding workloads, high production costs, and are difficult to maintain; fixed and welded ladders are prone to damage over time and are difficult to replace and repair;

[0003] The national utility model patent with patent number 202123393340.X discloses a transport vehicle ladder with a detachable top, which solves the above problems very well. However, the ladder disclosed therein is only applicable to the outside of the tank body and cannot be applied to the inside of the tank body. The existing ladder inside the tank body is a welded ladder. When the tank truck is in motion, the ladder will be impacted by the liquid inside the tank body, which is prone to stress concentration and may lead to the risk of cracking of the tank structure. Utility model content:

[0004] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a portable folding ladder device;

[0005] The first technical problem to be solved is that fixed and welded ladders are prone to damage over a long period of time and are difficult to replace and repair.

[0006] The second technical problem to be solved is that the welded tank ladder is easily impacted by the liquid inside the tank, which can easily cause stress concentration and pose a risk of cracking in the tank structure.

[0007] The specific technical solution of the utility model to solve the above technical problems is: a portable folding ladder device, which is detachably mounted on the top of the tank body, comprises two vertical support rods arranged in parallel, and a preset number of transverse support rods are arranged between the vertical support rods along the longitudinal direction of the vertical support rods;

[0008] The two ends of the transverse support rod are hinged with the vertical support rod; the upper ends of the vertical support rods are each provided with an outer edge platform, and the lower end surface of the outer edge platform is provided with a clamping component that is clamped with the top of the tank body through rotation of a rotating shaft.

[0009] Further, the clamping assembly includes a support seat rotatably connected to the lower end surface of the outer platform, the lower end surface of the support seat is provided with a movable latch, and claws are symmetrically provided on both sides of the movable latch, the claws are hinged to the fixed plate through a first rotating shaft, and the fixed plate is fixedly arranged with the support seat;

[0010] The side end surfaces of the clamping claws are hinged with movable plates through the second rotating shaft, one end of the movable plate is hinged with the clamping claw, and the other end is hinged with the movable latch.

[0011] A limiting column is fixedly arranged on the side end surface of the movable latch, the position of the limiting column is lower than the second rotating shaft, and the limiting column passes through the movable plate and is rotatably connected with the movable plate.

[0012] Furthermore, a groove for placing a compression spring is formed on the lower end surface of the support seat, and the movable latch is embedded in the groove and movably connected to the support seat through the compression spring.

[0013] Furthermore, a second rotating shaft is provided at one end of the clamping claw close to the supporting seat, and the second rotating shaft is fixedly mounted on the end surface of the clamping claw.

[0014] Furthermore, the first rotating shaft is installed at an upper middle position of the claw, one end of the first rotating shaft is fixedly connected to the fixed plate, and the other end passes through the claw and is rotatably connected to the claw.

[0015] Furthermore, a guardrail and a manhole cover are arranged on the top of the tank body, and the vertical support rod is snap-connected with the outer edge of the guardrail or the manhole cover through a snap-fit ​​assembly.

[0016] The beneficial effects of the utility model are:

[0017] One advantage of the utility model is that it provides a portable folding ladder device that can be used by workers both outside and inside the tank body. The portable folding ladder device can be snap-connected with the guardrail and manhole cover on the top of the tank body through a clamping assembly, which reduces the need to install and weld multiple ladders on the tank truck, avoids welding operations, and increases the service life of the tank truck. It solves the problems in the prior art that fixed and welded ladders are prone to damage over a long period of time and are difficult to replace and repair, and that welded ladders in the tank are susceptible to stress concentration due to the impact of the liquid inside the tank body, posing a risk of cracking to the tank structure.

[0018] One advantage of the utility model is that it provides a clamping assembly capable of clamping a can body, wherein the clamping assembly comprises claws capable of moving toward and relative to each other for clamping the can body and a movable pin driving the claws to move, the two cooperate with each other, and when the movable pin is subjected to a greater pressing force, the clamping effect of the claws will be tighter.

[0019] One advantage of the present invention is that both ends of the transverse support rod are hinged to the vertical support rod through pin bolts, so that the vertical support rod can be folded up and down, and can be folded and stored when not in use, thus reducing storage space. Description of the drawings:

[0020] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Attached Figure 2 It is a schematic diagram of the assembly structure of the utility model and the tank top guardrail;

[0022] Attached Figure 3 This is a schematic diagram of the assembly structure of the utility model and the human defense cover on the top of the tank;

[0023] Attached Figure 4 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0024] Attached Figure 5 This is a schematic diagram of the structure of the utility model in an expanded state;

[0025] Attached Figure 6 This is a schematic diagram of the utility model in folded state; in the accompanying drawings:

[0026] 1. Vertical support rod; 11. Outer edge platform; 12. Support seat; 121. Groove; 122. Compression spring; 13. Fixed plate; 14. Claw; 141. First claw; 1411. First movable plate; 142. Second claw; 1421. Second movable plate; 15. Movable latch; 151. Limit column; 16. First rotating shaft; 17. Second rotating shaft; 2. Horizontal support rod; 3. Tank body. Specific implementation method:

[0027] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] Specific implementation of the utility model: A portable folding ladder device, which is detachably mounted on the top of a tank body 3, comprises two parallel vertical support rods 1 and a preset number of transverse support rods 2, wherein the transverse support rods 2 are arranged at intervals along the vertical direction, and the transverse support rods 2 are installed between the two parallel vertical support rods 1, and the two ends of the transverse support rods 2 are hinged to the vertical support rods 1 through pin bolts;

[0029] The two ends of the transverse support rod 2 are tilted up and down, so that the vertical support rod 1 can be folded up and down; with this structure, it can be folded and stored when not in use, reducing the storage space;

[0030] The structure of the vertical support rod 1 can be a round tube, a square tube or an irregular cross-section structure; the transverse support rod 2 can be a C-shaped structure; the footrest position at the upper end of the transverse support rod 2 can be a flat plate, a perforated plate, or a patterned plate structure; the material of the ladder device can be aluminum alloy, stainless steel, carbon steel, and non-metallic materials, or a mixture of multiple materials;

[0031] The upper ends of the vertical support rods 1 are each provided with an outer platform 11, and the lower end surface of the outer platform 11 is provided with a clamping assembly for clamping the top of the tank body 3;

[0032] As a preferred embodiment of the present utility model, the engaging assembly is configured as:

[0033] The clamping assembly includes a support seat 12, a fixing plate 13 is provided at the rear end of the support seat 12, and a clamping claw 14 capable of moving toward and relative to each other for clamping the tank body 3 and a movable latch 15 driving the clamping claw 14 to move are provided below the support seat 12;

[0034] The lower end surface of the support seat 12 is provided with a groove 121 for placing a compression spring 122, and one end of the movable latch 15 is embedded in the groove 121 and contacts the support platform through the compression spring 122;

[0035] The claws 14 are arranged on both sides of the movable latch 15, and the claws 14 are rotatably connected to the fixed plate 13 through the first rotating shaft 16; the first rotating shaft 16 is installed at the upper middle position of the claws 14, one end of the first rotating shaft 16 is fixedly connected to the fixed plate 13, and the other end of the first rotating shaft 16 passes through the claws 14 and is rotatably connected to the claws 14;

[0036] The clamping claw 14 is provided with a second rotating shaft 17 at one end close to the supporting seat 12, and the second rotating shaft 17 is fixedly mounted on the end surface of the clamping claw 14;

[0037] The clamping claw 14 includes a first clamping claw 141 and a second clamping claw 142, the first clamping claw 141 and the second clamping claw 142 are symmetrically arranged, the first clamping claw 141 and the second clamping claw 142 are both rotatably connected to the fixed plate 13 via the first rotating shaft 16, the first clamping claw 141 is provided with a first movable plate 1411 via the second rotating shaft 17, the second clamping claw 142 is provided with a second movable plate 1421 via the second rotating shaft 17, the first movable plate 1411 and the second movable plate 1421 are rotatably connected to the second rotating shaft 17 respectively;

[0038] The first movable plate 1411 and the second movable plate 1421 are staggered, and the second movable plate 1421 is placed on the outside of the first movable plate 1411. The first movable plate 1411 and the second movable plate 1421 are movably connected with the movable latch 15. A limiting column 151 is fixedly provided on the surface of the movable latch 15. The position of the limiting column 151 is lower than the second rotating shaft 17. The limiting column 151 passes through the first movable plate 1411 and the second movable plate 1421 in sequence and is rotatably connected with the first movable plate 1411 and the second movable plate 1421.

[0039] The top of the tank body 3 is provided with a guardrail and a manhole cover, and the vertical support rod 1 is connected to the outer edge of the guardrail or the manhole cover by a snap-fit ​​assembly; the man-protection cover is square or round, and its size is also different. In order to meet different needs, as a preferred embodiment of the utility model, the snap-fit ​​assembly is arranged to be rotatably connected with the outer platform 11, and the outer platform 11 is rotatably connected with the support seat 12 through a rotating shaft. As a preferred embodiment, a locking hole to prevent the pin shaft can also be opened between the outer platform 11 and the support seat 12, and the locking hole is used to snap the outer platform 11 with the support seat 12 to prevent the snap-fit ​​assembly from rotating when not in use;

[0040] Compared with the existing design of setting ladders both outside and inside the tank body of a tank truck, this structure has a complex process, a large welding workload, a high manufacturing cost, and is difficult to repair; and fixed and welded ladders are prone to damage over a long period of time and are difficult to replace and repair, especially welded ladders inside the tank, which are easily impacted by the liquid inside the tank body, causing stress concentration and potential cracking of the tank body structure;

[0041] The utility model can meet the needs of workers for use outside and inside the tank body 3, reduces the installation and welding of multiple ladders in the tank truck, avoids welding operations, and increases the service life of the tank truck; and there is no fixed ladder in the tank truck, which reduces the number of unrelated personnel climbing onto the top of the tank body 3 and entering the inside of the tank body 3, thereby improving the overall safety of the tank truck.

[0042] It should be noted that the utility model is a portable folding ladder device.

[0043] When the staff needs to climb onto the tank body 3, they first unfold the transverse support rod 2, and then hang the clamping assembly behind the vertical support rod 1 on the outer edge of the safety rail. When the staff climbs, the clamping assembly will be clamped and clamped with the outer edge of the safety rail by force. The principle is as follows: when the movable latch 15 is pressed by an external force, the movable latch 15 moves into the groove 121, thereby squeezing the compression spring 122. In the process of the limit column 151 moving with the movable latch 15, since the position of the limit column 151 is lower than the second rotating shaft 17, the first clamping claw 141 and the second clamping claw 142 are driven to move outward with the first rotating shaft 16 as the center of the circle, and move inward with the end close to the support seat 12 and the end away from the support seat 12. The clamping claw 14 contacts the outer edge of the safety rail, thereby achieving a clamping effect. With this structure, the greater the pressing force on the movable latch 15, the tighter the clamping effect of the first clamping claw 141 and the second clamping claw 142 will be.

[0044] When the staff climbs up the tank body 3 and stops applying force to the ladder, the clamping assembly will cancel the clamping. The principle is as follows: when the movable latch 15 is no longer subjected to force, the compression spring 122 pushes the movable latch 15 outward. As the limit column 151 moves with the movable latch 15, the first claw 141 and the second claw 142 move inward with the first rotating shaft 16 as the center, close to the support seat 12, and move outward away from the support seat 12. The first claw 141 and the second claw 142 will no longer contact the outer edge of the safety railing, thereby canceling the clamping effect.

[0045] When the staff needs to enter the tank body 3 to work, they open the cover of the human defense cover above the tank body 3, and hang the locking assembly behind the vertical support rod 1 on the outer edge of the manhole cover. The lower end of the vertical support rod 1 contacts the bottom of the tank body 3. When the staff climbs, the locking assembly will be subjected to force and clamped with the outer edge of the manhole cover. The principle is the same as above.

[0046] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A portable folding ladder device, detachably mounted on the top of a tank body (3), comprising two parallel vertical support rods (1), wherein a preset number of transverse support rods (2) are arranged between the vertical support rods (1) along the longitudinal direction of the vertical support rods (1); characterized in that: Both ends of the transverse support rod (2) are hinged to the vertical support rod (1); the upper ends of the vertical support rods (1) are each provided with an outer edge platform (11), and the lower end surface of the outer edge platform (11) is provided with a snap-fitting assembly that snaps with the top of the tank body (3) by rotating through a rotating shaft.

2. A portable folding ladder device according to claim 1, characterized in that The clamping assembly comprises a support seat (12) rotatably connected to the lower end surface of the outer platform (11); a movable latch (15) is arranged on the lower end surface of the support seat (12); claws (14) are symmetrically arranged on both sides of the movable latch (15); the claws (14) are hinged to the fixed plate (13) via a first rotating shaft (16); and the fixed plate (13) is fixedly arranged on the support seat (12); The side end surfaces of the clamping claws (14) are hinged with movable plates through second rotating shafts (17), one end of the movable plate is hinged with the clamping claws (14), and the other end is hinged with the movable latch (15); A limiting column (151) is fixedly arranged on the side end surface of the movable latch (15); the position of the limiting column (151) is lower than the second rotating shaft (17); the limiting column (151) penetrates the movable plate and is rotatably connected to the movable plate.

3. A portable folding ladder device according to claim 2, characterized in that The lower end surface of the support seat (12) is provided with a groove (121) for accommodating a compression spring (122); the movable latch (15) is embedded in the groove (121) and is movably connected to the support seat (12) via the compression spring (122).

4. A portable folding ladder device according to claim 2, characterized in that A second rotating shaft (17) is provided at one end of the clamping claw (14) close to the supporting seat (12), and the second rotating shaft (17) is fixedly mounted on the end surface of the clamping claw (14).

5. A portable folding ladder device according to claim 2, characterized in that The first rotating shaft (16) is installed at a middle upper position of the clamping claw (14); one end of the first rotating shaft (16) is fixedly connected to the fixing plate (13), and the other end passes through the clamping claw (14) and is rotatably connected to the clamping claw (14).

6. A portable folding ladder device according to claim 1, characterized in that A guardrail and a manhole cover are arranged on the top of the tank body (3), and the vertical support rod (1) is snap-connected with the outer edge of the guardrail or the manhole cover via a snap-fit ​​assembly.

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