A telescoping bench ladder for use with an isolator

Abstract

The utility model relates to a telescopic bench ladder applied to the operation of isolator, including two groups of climbing structure, install the installation link frame between two groups of climbing structure, the top of each climbing structure all is fixedly connected with fixed platform, each fixed platform all is fixedly connected with a plurality of telescopic rod parts, still include intermediate platform, a plurality of telescopic rod parts all slide and are equipped in the intermediate platform, the climbing structure includes the mobile base of installing a plurality of universal wheel, install the ladder subassembly and the inclined bracing frame on the mobile base, and both are in the shape of herringbone distribution, the upper ladder subassembly is slidably connected on the ladder subassembly, install a plurality of lifting rings on the upper ladder subassembly, still include the winding assembly connected through the steel wire rope and a plurality of lifting rings, still include the positioning support mechanism installed on the mobile base, still include the double-shaft drive structure installed between two groups of climbing structure, the utility model telescopic height adjustable, simple operation and can move flexibly, guarantee the mobile flexibility of the utility model, and the applicability is strong.

Description

Technical Field

[0001] This utility model belongs to the technical field of vaccine production equipment, and in particular relates to a retractable stool ladder used in isolator operation. Background Technology

[0002] In the vaccine production cycle, SPF animals are usually used. SPF (Specific Pathogen Free) animals are laboratory animals that do not carry major potential infectious agents or conditional pathogens or pathogens that would greatly interfere with scientific experiments, except for pathogens that should be excluded from clean animals.

[0003] In laboratory animal husbandry, to ensure the accuracy and reliability of experimental results, laboratory animals are typically subject to strict isolation and management, thus requiring the use of isolators. Laboratory animal isolators are specialized equipment for housing germ-free or SPF (Special Purpose Free) laboratory animals, and also provide a safe and sterile environment for surgical procedures. To save space, isolators are often built very tall and multi-tiered. When workers are performing operations, tools are needed to access the upper isolators, requiring the use of ladders and other similar equipment.

[0004] Currently available ladders are typically of fixed length, making them unsuitable for varying heights and lacking flexibility. Furthermore, existing ladders are inconvenient to move, requiring manual transport and consuming significant physical strength. This drawback is particularly pronounced when frequent changes of work location are needed, increasing worker fatigue. The length and weight of the ladder during transport and movement can also cause inconvenience or instability, increasing the risk of worker injury. Therefore, there is an urgent need to design a retractable ladder for isolator operation to address these issues. Summary of the Invention

[0005] This invention provides a retractable ladder with a reasonable structural design for use in isolator operation, addressing technical problems existing in prior art. This invention features adjustable height, flexible movement, and strong applicability.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows: A retractable ladder for isolator operation includes two sets of climbing structures that are symmetrically arranged and movable, and an installation frame connecting the two sets of climbing structures is installed between them; a fixed platform is fixedly connected to the top of each climbing structure, and several telescopic rods arranged horizontally side by side are fixedly connected to the inner end of each fixed platform; an intermediate platform is also provided between the two sets of fixed platforms, and several telescopic rods are slidably inserted into the intermediate platform; the climbing structure includes a movable base with several universal wheels installed at the bottom, and a lower ladder assembly and a diagonal support frame fixedly connected to the top are installed on the movable base, the lower ladder assembly and the diagonal support frame being distributed in a V-shape; an upper ladder assembly is slidably connected to the lower ladder assembly; several lifting rings are installed on the upper ladder assembly; a winch assembly connected to several lifting rings by steel wire rope is also provided on the diagonal support frame; a positioning support mechanism is also provided on the movable base; and a dual-axis drive structure is also provided between the two sets of climbing structures for driving the two sets of winch assemblies to rotate synchronously.

[0007] The advantages and positive effects of this utility model are as follows: This utility model provides a retractable ladder for isolating device operation. Through two sets of climbing structures, workers can easily climb to an operating platform consisting of a central platform, several telescopic rods, and two fixed platforms. Since both climbing structures include several casters, they are movable, ensuring the flexibility of movement. The sliding connection between the lower and upper ladder components in the climbing structure ensures the height of the operating platform is adjustable. The sliding connection between the central platform and the corresponding fixed platform via several telescopic rods ensures the feasibility of raising and lowering the operating platform. The dual-axis drive structure, in conjunction with the winch assembly and lifting ring in the climbing structure, drives the two upper ladder components to synchronously extend and retract along the corresponding lower ladder components, simplifying the operation. The positioning support mechanism in the climbing structure positions the utility model, preventing it from moving during operation. This utility model is retractable, height adjustable, simple to operate, and flexible to move, ensuring its mobility and strong applicability.

[0008] Preferably, the lower ladder assembly includes two opposing lower supports, with a plurality of pedals evenly distributed along its length fixed between the two lower supports; it also includes fixed slides fixed to the top of each lower support, and the upper ladder assembly slides through the two fixed slides; each fixed slide is provided with a wear-resistant layer.

[0009] Preferably, the upper ladder assembly includes two opposing upper supports, with a plurality of footplates evenly distributed along its length fixed between the two upper supports; a limiting block that frictionally engages with the lower ladder assembly is installed on the outer side wall of each of the two upper supports; it also includes a fall prevention mechanism installed between the lower parts of the two upper supports and located between the two footplates; and a footplate locking mechanism installed on the upper supports for locking the upper ladder assembly and the lower ladder assembly.

[0010] Preferably, the fall arrest mechanism includes two fall arrest mounting seats fixedly attached to the opposite surfaces of two upper supports. Each fall arrest mounting seat is pivotally connected to a fall arrest claw via a pin. A counterweight bar is installed between the outer ends of the two fall arrest claws. The mechanism also includes positioning bolts installed on each fall arrest mounting seat for limiting the fall arrest claws. The inner surface of the fall arrest claw is bent. In its natural state, the second step located below the fall arrest claw contacts the outer end of the inner surface of the fall arrest claw to limit the fall arrest claw. The inner end of the fall arrest claw extends into the area of ​​the lower ladder assembly.

[0011] Preferably, the pedal locking mechanism includes a locking mounting base mounted on the upper bracket, a locking chuck pivotally connected to the locking mounting base via a pin, a locking receiving groove provided on the locking chuck to accommodate the second pedal and the middle part of the lower ladder assembly located below it, and a chuck tongue installed at the inner end of the locking chuck; the pedal locking mechanism is provided in two sets.

[0012] Preferably, the hoisting assembly includes at least two sets of pulleys rotatably connected to the top of the diagonal brace, and a shaft seat fixed to the diagonal brace below the at least two sets of pulleys. A transversely arranged shaft is rotatably connected to the shaft seat. The shaft is connected to a dual-shaft drive structure. A wire rope is wound on the shaft. The outer end of the wire rope passes through the pulley and is connected to a lifting ring installed on the upper ladder assembly.

[0013] Preferably, the dual-shaft drive structure includes a bracket mounted on a mounting frame, a second reversing gearbox mounted on the bracket, a handwheel mounted on the input shaft of the second reversing gearbox, and reversing drive shafts mounted on both output shafts of the second reversing gearbox. The two reversing drive shafts are coaxially arranged, and a first reversing gearbox is mounted on the outer end of each reversing drive shaft and connected to the corresponding hoisting assembly through the first reversing gearbox. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the climbing structure in this utility model; Figure 3 This is a three-dimensional structural diagram of the lower ladder component in this utility model; Figure 4This is a three-dimensional structural diagram of the ladder component in this utility model; Figure 5 This is a three-dimensional structural diagram of the telescopic drive component in this utility model; Figure 6 This is a three-dimensional structural diagram of the dual-axis drive structure in this utility model.

[0015] In the diagram: 1. Climbing structure; 1-1. Casters; 1-2. Steps; 1-3. Lower ladder assembly; 1-3-1. Lower support; 1-3-2. Fixed slide; 1-3-3. Wear-resistant layer; 1-3-4. Step 1; 1-4. Upper ladder assembly; 1-4-1. Counterweight bar; 1-4-2. Fall arrestor claw; 1-4-3. Positioning bolt; 1-4-4. Fall arrestor mounting base; 1-4-5. Mounting brace; 1-4-6. Step 2; 1-4-7. Upper support; 1-4-8. Chuck tongue; 1-4-9. Locking receiving slot; 1-4-10. Lock 1. Fixed chuck; 1-4-11. Locking mounting base; 1-4-12. Limit block; 1-5. Lifting ring; 1-6. Handrail; 1-7. Diagonal brace; 1-8. Winch assembly; 1-8-1. Shaft; 1-8-2. Shaft seat; 1-8-3. Pulley; 1-9. Support screw; 1-10. Support foot; 1-11. Moving base; 2. Fixed platform; 3. Guardrail; 4. Telescopic rod; 5. Intermediate platform; 6. Dual-shaft drive structure; 6-1. Reversing gearbox one; 6-2. Reversing drive shaft; 6-3. Reversing gearbox two; 7. Mounting frame. Detailed Implementation

[0016] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail: Please see Figure 1 The retractable ladder for isolator operation of this utility model includes two sets of climbing structures 1 that are symmetrically arranged and movable, and an installation frame 7 that connects the two sets of climbing structures 1 into one unit is installed between the two sets of climbing structures 1. Each climbing structure 1 has a fixed platform 2 fixedly attached to its top. Several horizontally arranged telescopic rods 4 are fixedly attached to the inner end of each fixed platform 2. An intermediate platform 5 is also provided between two sets of fixed platforms 2, with the telescopic rods 4 slidingly inserted within the intermediate platform 5. Guardrails 3 are installed on each fixed platform 2 and the intermediate platform 5.

[0017] like Figure 2As shown, the climbing structure 1 includes a movable base 1-11 with several casters 1-1 mounted on its bottom. A lower ladder assembly 1-3 and a diagonal support frame 1-7, fixedly connected to each other at the top, are mounted on the movable base 1-11. The lower ladder assembly 1-3 and the diagonal support frame 1-7 are arranged in a V-shape. An upper ladder assembly 1-4, slidably connected to the lower ladder assembly 1-3, is threaded through it. Several lifting rings 1-5 are mounted on the upper ladder assembly 1-4. The structure also includes a winch assembly 1-8 mounted on the diagonal support frame 1-7 and connected to the lifting rings 1-5 via steel wire ropes. Furthermore, a positioning support mechanism is mounted on the movable base 1-11. A dual-axis drive structure 6 is also included between the two sets of climbing structures 1, used to drive the two sets of winch assemblies 1-8 to rotate synchronously. The climbing structure 1 also includes a footboard 1-2 mounted on the movable base 1-11.

[0018] The aforementioned positioning support mechanism includes a support screw 1-9 screwed onto the movable base 1-11, and a support foot 1-10 installed at the lower end of the support screw 1-9.

[0019] See further Figure 3 The aforementioned lower ladder assembly 1-3 includes two opposing lower supports 1-3-1, with a plurality of pedals 1-3-4 evenly distributed along their length fixed between the two lower supports 1-3-1; it also includes fixed slides 1-3-2 fixed to the top of each lower support 1-3-1, with the upper ladder assembly 1-4 slidably passing through the two fixed slides 1-3-2; each fixed slide 1-3-2 is provided with a wear-resistant layer 1-3-3. Diagonal bracing members are installed between the plurality of pedals 1-3-4 and the corresponding lower supports 1-3-1.

[0020] See further Figure 4 The aforementioned upper ladder assembly 1-4 includes two opposing upper supports 1-4-7, with a plurality of footplates 1-4-6 evenly distributed along its length fixed between the two upper supports 1-4-7; limiting blocks 1-4-12 that rub against the lower ladder assembly 1-3 are installed on the outer side walls of each of the two upper supports 1-4-7; and mounting braces 1-4-5 connect the upper supports 1-4-7 and the plurality of footplates 1-4-6. In this embodiment, the two upper supports 1-4-7 and the two lower supports 1-3-1 are all C-shaped steel, with the lower supports 1-3-1 and the upper supports 1-4-7 on the same side being opposite each other; the plurality of limiting blocks 1-4-12 are bent plates.

[0021] The upper ladder assembly 1-4 also includes a fall protection mechanism installed between the lower parts of the two upper supports 1-4-7 and located between the two footboards 1-4-6; it also includes a footboard locking mechanism installed on the upper supports 1-4-7 for locking the upper ladder assembly 1-4 and the lower ladder assembly 1-3.

[0022] like Figure 4 As shown, the aforementioned fall arrest mechanism includes two fall arrest mounting seats 1-4-4 fixedly attached to the opposite surfaces of two upper supports 1-4-7. Each fall arrest mounting seat 1-4-4 is pivotally connected to a fall arrest claw 1-4-2 via a pin. A counterweight rod 1-4-1 is installed between the outer ends of the two fall arrest claws 1-4-2. The mechanism also includes positioning bolts 1-4-3 installed on each fall arrest mounting seat 1-4-4 for limiting the fall arrest claw 1-4-2. The inner surface of the fall arrest claw 1-4-2 is bent. In its natural state, the second step 1-4-6 located below the fall arrest claw 1-4-2 contacts the outer end of the inner surface of the fall arrest claw 1-4-2 to limit the fall arrest claw 1-4-2. The inner end of the fall arrest claw 1-4-2 extends into the area of ​​the lower ladder assembly 1-3.

[0023] The anti-fall mechanism prevents the upper ladder assembly 1-4 from sliding downwards along the lower ladder assembly 1-3 in the event of an emergency. Specifically, when the upper ladder assembly 1-4 slides downwards due to an emergency, the inner end of the anti-fall claw 1-4-2 collides with the corresponding pedal 1-3-4 in the lower ladder assembly 1-3. Under the limiting and blocking effect of the pedal 1-4-6 below the anti-fall claw 1-4-2, the inner end of the anti-fall claw 1-4-2 engages with the corresponding pedal 1-3-4 in the lower ladder assembly 1-3, thus achieving the anti-fall function. Furthermore, given that in its natural state, the two anti-fall claws 1-4-2... Under the action of the counterweight 1-4-1, the inner end of the counterweight is tilted upwards. The lower ladder assembly 1-3 is located inside the upper ladder assembly 1-4. When the upper ladder assembly 1-4 moves upwards along the lower ladder assembly 1-3, the fall protection mechanism will not affect the movement of the upper ladder assembly 1-4. When the upper ladder assembly 1-4 needs to move downwards normally, the operator needs to lift the counterweight 1-4-1 upwards, so that the outer end of the fall protection claw 1-4-2 tilts upwards, ensuring that the inner end of the fall protection claw 1-4-2 flips downwards to the outside of the several steps 1-3-4 in the lower ladder assembly 1-3, so as not to affect the movement of the upper ladder assembly 1-4.

[0024] like Figure 4 As shown, the aforementioned pedal locking mechanism includes a locking mounting base 1-4-11 mounted on the upper bracket 1-4-7. A locking chuck 1-4-10 is pivotally connected to the locking mounting base 1-4-11 via a pin. The locking chuck 1-4-10 has a locking receiving groove 1-4-9 that can accommodate the second pedal 1-4-6 located below it and the middle part of the lower ladder assembly 1-3 (i.e., the first pedal 1-3-4). A chuck tongue 1-4-8 is installed at the inner end of the locking chuck 1-4-10. The pedal locking mechanism is provided in two sets.

[0025] In actual operation, the locking chuck 1-4-10 has a locking receiving groove 1-4-9 sized to accommodate pedal two 1-4-6 and pedal one 1-3-4. In actual operation, when the upper ladder assembly 1-4 moves to a suitable position along the lower ladder assembly 1-3, the locking chuck 1-4-10 flips towards the lower ladder assembly 1-3, so that the corresponding adjacent pedal two 1-4-6 and pedal one 1-3-4 are located in the locking receiving groove 1-4-9. Then, the chuck tongue 1-4-8 is pulled upward to complete the locking connection between the lower ladder assembly 1-3 and the upper ladder assembly 1-4.

[0026] See further Figure 5 The aforementioned hoisting assembly 1-8 includes at least two sets of pulleys 1-8-3 rotatably connected to the top of the diagonal brace 1-7, and also includes a shaft seat 1-8-2 fixed to the diagonal brace 1-7 below the at least two sets of pulleys 1-8-3. A transversely arranged shaft 1-8-1 is rotatably connected to the shaft seat 1-8-2. The shaft 1-8-1 is connected to the dual-shaft drive structure 6. A steel wire rope is wound on the shaft 1-8-1. The outer end of the steel wire rope passes through the pulleys 1-8-3 and is connected to the lifting ring 1-5 installed on the upper ladder assembly 1-4.

[0027] In actual operation, when it is necessary to increase the height of the ladder, the dual-axis drive structure 6 drives the two shafts 1-8-1 to rotate synchronously, thereby winding up the wire rope. The wire rope synchronously pulls the two upper ladder components 1-4 upward, thereby increasing the height of this utility model.

[0028] like Figure 6 As shown, the aforementioned dual-shaft drive structure 6 includes a bracket mounted on a mounting frame 7. A second reversing gearbox 6-3 is mounted on the bracket. A handwheel is mounted on the input shaft of the second reversing gearbox 6-3. Reversing drive shafts 6-2 are mounted on both output shafts of the second reversing gearbox 6-3, and the two reversing drive shafts 6-2 are coaxially arranged. A first reversing gearbox 6-1 is mounted at the outer end of each reversing drive shaft 6-2, and is connected to the corresponding hoisting assembly 1-8 via the first reversing gearbox 6-1. The two vertical shaft ends of the first reversing gearbox 6-1 are respectively connected to the shaft 1-8-1 and the reversing drive shaft 6-2 via couplings.

[0029] Working principle: When needed, the ladder of this utility model is pushed to the isolator to be operated, and the height of the ladder is adjusted as needed. The specific adjustment process is to manually rotate the handwheel installed on the reversing gearbox 6-3, which drives the two shafts 1-8-1 to rotate synchronously through the dual-shaft drive structure 6, thereby winding up the wire rope. The wire rope pulls the two upper ladder components 1-4 upwards synchronously, thereby ensuring that the fixed platform 2 and the intermediate platform 5 rise to a height that is convenient for operation (during the rising process, several telescopic rods 4 extend outwards relative to the intermediate platform 5). Then, the pedal locking mechanism is used to lock the ladder. The lower ladder assembly 1-3 and the upper ladder assembly 1-4 are locked together to ensure that workers can climb to the platform via the climbing structure 1 to operate the isolator. After the work is completed, the workers need to lift the counterweight bar 1-4-1 upwards, so that the outer end of the fall arrestor claw 1-4-2 tilts upwards, ensuring that the inner end of the fall arrestor claw 1-4-2 flips downwards to the outside of several steps 1-3-4 in the lower ladder assembly 1-3 without affecting the movement of the upper ladder assembly 1-4, thereby allowing the upper ladder assembly 1-4 to move downwards along the lower ladder assembly 1-3 to the initial position.

Claims

1. A telescoping bench ladder for use in isolator operations, characterized by: The system includes two symmetrically arranged and movable climbing structures (1), with a mounting frame (7) connecting the two climbing structures (1) together; a fixed platform (2) is fixedly connected to the top of each climbing structure (1), and several horizontally arranged telescopic rods (4) are fixedly connected to the inner end of each fixed platform (2); the system also includes an intermediate platform (5) between the two fixed platforms (2), with the telescopic rods (4) slidingly inserted into the intermediate platform (5); the climbing structure (1) includes a movable base (1-11) with several casters (1-1) installed at the bottom, and a top-fixed... The lower ladder assembly (1-3) and the inclined support frame (1-7) are connected in a herringbone pattern. An upper ladder assembly (1-4) is slidably connected to the lower ladder assembly (1-3). Several lifting rings (1-5) are installed on the upper ladder assembly (1-4). The hoisting assembly (1-8) connected to the lifting rings (1-5) by steel wire rope is installed on the inclined support frame (1-7). The positioning support mechanism is installed on the movable base (1-11). The dual-shaft drive structure (6) is installed between the two climbing structures (1) to drive the two hoisting assemblies (1-8) to rotate synchronously.

2. The telescoping bench ladder for isolator operation of claim 1, wherein: The lower ladder assembly (1-3) includes two lower supports (1-3-1) arranged opposite each other, and a number of pedals (1-3-4) evenly distributed along the length direction are fixed between the two lower supports (1-3-1); it also includes fixed slides (1-3-2) fixed to the top of each lower support (1-3-1), and the upper ladder assembly (1-4) slides through the two fixed slides (1-3-2); a wear-resistant layer (1-3-3) is provided in each fixed slide (1-3-2).

3. The telescoping bench ladder for isolator operation of claim 1, wherein: The upper ladder assembly (1-4) includes two opposing upper supports (1-4-7), with a plurality of footplates (1-4-6) evenly distributed along its length fixed between the two upper supports (1-4-7); a limiting block (1-4-12) that frictionally engages with the lower ladder assembly (1-3) is installed on the outer side wall of each of the two upper supports (1-4-7); it also includes a fall prevention mechanism installed between the two footplates (1-4-6) between the lower parts of the two upper supports (1-4-7); and a footplate locking mechanism installed on the upper support (1-4-7) for locking the upper ladder assembly (1-4) and the lower ladder assembly (1-3).

4. The telescoping bench ladder for isolator operation of claim 3, wherein: The fall arrest mechanism includes two fall arrest mounting seats (1-4-4) fixed to the opposite surfaces of two upper supports (1-4-7). Each fall arrest mounting seat (1-4-4) is pivotally connected to a fall arrest claw (1-4-2) via a pin. A counterweight bar (1-4-1) is installed between the outer ends of the two fall arrest claws (1-4-2). The mechanism also includes positioning bolts (1-4-3) installed on each fall arrest mounting seat (1-4-4) for limiting the fall arrest claw (1-4-2). The inner side of the fall arrest claw (1-4-2) is bent. In its natural state, the second step (1-4-6) located below the fall arrest claw (1-4-2) contacts the outer end of the inner side of the fall arrest claw (1-4-2) to limit the fall arrest claw (1-4-2). The inner end of the fall arrest claw (1-4-2) extends into the area of ​​the lower ladder assembly (1-3).

5. The telescoping bench step for use with an isolator as defined in claim 1, wherein: The pedal locking mechanism includes a locking mounting base (1-4-11) mounted on the upper bracket (1-4-7), a locking chuck (1-4-10) pivotally connected to the locking mounting base (1-4-11) via a pin, a locking receiving groove (1-4-9) provided on the locking chuck (1-4-10) for accommodating the second pedal (1-4-6) located below it and the middle part of the lower ladder assembly (1-3), and a chuck tongue (1-4-8) installed at the inner end of the locking chuck (1-4-10); the pedal locking mechanism is provided in two sets.

6. The telescoping bench step for use with an isolator as defined in claim 1, wherein: The hoisting assembly (1-8) includes at least two sets of pulleys (1-8-3) rotatably connected to the top of the diagonal brace (1-7), and a shaft seat (1-8-2) fixed to the diagonal brace (1-7) and disposed below the at least two sets of pulleys (1-8-3). A transversely arranged shaft (1-8-1) is rotatably connected to the shaft seat (1-8-2). The shaft (1-8-1) is connected to the dual-shaft drive structure (6). A wire rope is wound on the shaft (1-8-1). The outer end of the wire rope passes through the pulley (1-8-3) and is connected to the lifting ring (1-5) installed on the upper ladder assembly (1-4).

7. The telescoping bench step for use with an isolator as defined in claim 1 wherein: The dual-shaft drive structure (6) includes a bracket mounted on a mounting frame (7), a second reversing gearbox (6-3) mounted on the bracket, a handwheel mounted on the input shaft of the second reversing gearbox (6-3), and reversing drive shafts (6-2) mounted on both output shafts of the second reversing gearbox (6-3). The two reversing drive shafts (6-2) are coaxially arranged, and a first reversing gearbox (6-1) is mounted on the outer end of each reversing drive shaft (6-2) and connected to the corresponding hoisting assembly (1-8) through the first reversing gearbox (6-1).

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