A folding rescue ladder structure

Abstract

The utility model discloses a folding rescue ladder structure relates to rescue folding ladder technical field, the utility model discloses a first telescopic ladder, first telescopic ladder top is connected with first gyro wheel frame, and first telescopic ladder one side is connected with support, and the support top is penetrated with adjusting frame, and the outside surface of adjusting frame and the outside surface of support both sides are all seted up with pin hole, and the inside connection of pin hole is limited by limit stop. The utility model discloses through the setting of first gyro wheel frame, second gyro wheel frame, support, adjusting frame, pin hole and limit stop, after overturning folding rescue ladder, first gyro wheel frame is contacted with ground, and limit stop is taken out simultaneously, and the limitation of adjusting frame is ended, then through the rotation adjusting frame makes second gyro wheel frame contact with ground, and finally reinserts limit stop and the angle limitation of adjusting frame, and first gyro wheel frame and second gyro wheel frame are contacted with ground, and the ground contact area is larger, need not staff to hold with force in the process of moving folding rescue ladder, reduces physical consumption, and simple operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of rescue folding ladder technology, specifically a folding rescue ladder structure. Background Technology

[0002] Folding rescue ladders are suitable for fire rescue, outdoor rescue and other scenarios. They are designed to be able to fold and retract to reduce space occupation when not in use, and to extend to a longer length when in use to facilitate rescue. Existing folding rescue ladders are mainly divided into telescopic, folding and folding telescopic types. Among them, the folding telescopic type has both folding and telescopic functions, and is much longer than the traditional telescopic and folding types. It is also more flexible in use. It can be used against a wall or folded into an A-frame ladder.

[0003] A folding emergency rescue ladder, application number 202321762971.0, includes an upright post with support legs installed at the lower end. The upright post is thicker at the bottom and tapers to a gradually increasing thickness at each subsequent segment. A first support rod is installed between the first segments of the upright post, and a second support rod is installed above the first support rod. A top support rod is installed at the very top of the upright post, forming a single step with each segment of support rod. Rollers are installed on the upper part of the top support rod, and a connecting strap is installed at the lower part of the second support rod. A fixing strap is sewn onto the connecting strap. The rollers are mounted on the top support rod via a fixing frame, and there are four rollers. The advantages are: this utility model, through the roller design, allows the rescue ladder to roll and move on flat surfaces, while also carrying other rescue equipment, reducing the burden on emergency rescue personnel.

[0004] This technical solution involves installing rollers at the top of the folding ladder. When it needs to be moved, the folding rescue ladder can be flipped over and moved by the rollers. However, when the folding rescue ladder is flipped over, the center of gravity is mainly at the top of the folding rescue ladder. The high center of gravity makes it easy to tip over, so workers need to use a lot of force to support it. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a folding rescue ladder structure to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a folding rescue ladder structure, including a first telescopic ladder, a first roller frame connected to the top of the first telescopic ladder, a support connected to one side of the first telescopic ladder, and an adjustment frame passing through the top of the support. Pin holes are provided on both sides of the outer surface of the adjustment frame and the outer surface of the support, and limit pins are connected inside the pin holes. A second roller frame is connected to the top of the adjustment frame through an inner spring damper and a guide rod.

[0007] By adopting the above technical solution, when relocation is required, the staff first flips the folding rescue ladder. After the ladder flips, the first roller frame contacts the ground, and the limit pin is pulled out to stop the adjustment frame from being limited. Then, the staff rotates the adjustment frame to make the second roller frame contact the ground. Finally, the staff reinserts the limit pin to limit the angle of the adjustment frame. The first and second roller frames cooperate to contact the ground, resulting in a large contact area. Since there are two first and two second roller frames, there are a total of four roller frames, which can effectively improve the stability during relocation. During relocation, the internal spring damper reduces the transmission of bumps and vibrations to the staff's hands, thereby reducing the occurrence of hand pain caused by shocks. It also reduces the impact force on the limit pin. At the same time, the guide rod can provide radial support and axial guidance, preventing the internal spring damper from breaking and leaking oil due to large radial impacts.

[0008] Furthermore, the adjustment frame is rotatably connected to the support, and the support has a fan-shaped cross-section.

[0009] By adopting the above technical solution, the staff can rotate the adjustment frame to make the second roller frame contact the ground. The first roller frame and the second roller frame work together to contact the ground, resulting in a large contact area and effectively preventing tipping.

[0010] Furthermore, the limiting pin is made of 4340 high-strength alloy steel or 17-4PH stainless steel.

[0011] By adopting the above technical solutions, 4340 high-strength alloy steel has high strength and toughness, good fatigue resistance, and can effectively avoid the fracture of the limit pin due to radial impact, while 17-4PH stainless steel has excellent corrosion resistance.

[0012] Furthermore, the limiting pin is disassembled from the pin hole.

[0013] By adopting the above technical solution, the limit pin is pulled out to end the limitation of the adjustment frame. Then, the staff rotates the adjustment frame to adjust the position of the second roller frame. Finally, the staff reinserts the limit pin to limit the angle of the adjustment frame.

[0014] Furthermore, the second roller frame is slidably connected to the guide rod.

[0015] By adopting the above technical solution, the guide rod can play a role in radial support and axial guidance, avoiding the phenomenon of breakage and oil leakage of the inner spring damper due to large radial impact.

[0016] Furthermore, the guide rod is made of 20MnCr5 high-strength alloy steel or 17-4PH stainless steel, and the surface of the guide rod is coated with DLC.

[0017] By adopting the above technical solutions, 20MnCr5 high-strength alloy steel has high strength and wear and impact resistance. 17-4PH stainless steel has slightly lower impact toughness than 20MnCr5 high-strength alloy steel, but its corrosion resistance, yield strength and hardness are better than 20MnCr5 high-strength alloy steel. Furthermore, the DLC coating can further increase the surface hardness of the guide rod and reduce the coefficient of friction, thereby reducing wear.

[0018] Furthermore, there are two of each of the first roller frame, the second roller frame, the bracket, the adjusting frame, the limiting pin, and the inner spring damper, and there are two sets of pin holes and guide rods.

[0019] By adopting the above technical solution, the first roller frame and the second roller frame work together to contact the ground, resulting in a large contact area. Furthermore, there are two of each of the first and second roller frames, for a total of four roller frames, which can effectively improve stability during movement.

[0020] Furthermore, the top of the first telescopic ladder is connected to a second telescopic ladder via a folding ladder hinge, and a connector is attached to the outer surface of the first telescopic ladder.

[0021] By adopting the above technical solution, when extension is required, the first and second telescopic ladders will extend the ladder bars section by section. The length of each section of the first and second telescopic ladders is fixed by friction or spring clips. When rotation and folding are required, the folding ladder hinges act as joint supports for rotation. The folding ladder hinges have a built-in locking structure that can automatically lock at multiple angles. If further adjustment is needed, the worker must first unlock the locks. If the first and second telescopic ladders are rotated to an aligned state through the folding ladder hinges, the connecting piece is not required. If the first and second telescopic ladders are rotated to an A-shape through the folding ladder hinges, the worker can rotate the connecting piece and fasten one end of the connecting piece to the second telescopic ladder, thus forming an A-frame ladder.

[0022] Furthermore, a round handle is connected to the lower part of the interior of the first telescopic ladder.

[0023] By adopting the above technical solution, staff can use the round handle as a gripping point to pull or push the folding rescue ladder.

[0024] In summary, the present invention has the following main advantages: 1. This utility model, through the arrangement of a first roller frame, a second roller frame, a bracket, an adjusting frame, pin holes, and a limiting pin, allows the first roller frame to contact the ground after the folding rescue ladder is flipped over. Simultaneously, the limiting pin is pulled out to stop the adjusting frame from being limited. Then, the adjusting frame is rotated to bring the second roller frame into contact with the ground. Finally, the limiting pin is reinserted to limit the angle of the adjusting frame. The first and second roller frames work together to contact the ground, resulting in a large contact area. Furthermore, there are two first roller frames and two second roller frames, for a total of four roller frames, effectively improving stability during movement. This eliminates the need for workers to hold the folding rescue ladder firmly during movement, reducing physical exertion, and the operation is simple and convenient. 2. This utility model, through the setting of an internal spring damper and a guide rod, reduces the transmission of bumps and vibrations to the workers' hands during transportation, thereby reducing the occurrence of hand pain caused by shocks and reducing the impact force on the limit pin. At the same time, the guide rod can play a role in radial support and axial guidance, preventing the internal spring damper from breaking and leaking oil due to large radial impacts; reducing vibration and impact, improving structural stability and comfort. Attached Figure Description

[0025] Figure 1 This is a side view of the present invention. Figure 2 This is a schematic diagram of the structure of this utility model when folded; Figure 3 This is a schematic diagram of the structure of this utility model during transportation; Figure 4 This is a schematic diagram of the exploded structure of the adjustment frame of this utility model.

[0026] In the diagram: 1. First telescopic ladder; 2. Second telescopic ladder; 3. Folding ladder hinge; 4. Connector; 5. First roller frame; 6. Second roller frame; 7. Support; 8. Adjusting frame; 9. Pin hole; 10. Limit pin; 11. Inner spring damper; 12. Guide rod; 13. Round rod handle. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of this utility model will be described below based on its overall structure.

[0029] Example 1: A folding rescue ladder structure, such as Figures 1-4As shown, the system includes a first telescopic ladder 1, with a first roller frame 5 connected to the top of the first telescopic ladder 1. A support 7 is connected to one side of the first telescopic ladder 1. The support 7 has a fan-shaped cross-section, and an adjusting frame 8 passes through the top of the support 7. The adjusting frame 8 is rotatably connected to the support 7. Pin holes 9 are provided on both sides of the outer surface of the adjusting frame 8 and the outer surface of the support 7. Limit pins 10 are connected inside the pin holes 9. The limit pins 10 are made of 4340 high-strength alloy steel or 17-4PH stainless steel. The limit pins 10 are detachably connected to the pin holes 9. When movement is required, the operator first flips the folding rescue ladder over. After the folding rescue ladder flips over, the first roller frame 5 contacts the ground. At the same time, the limit pins 10 are pulled out to stop limiting the adjusting frame 8. Then, the operator rotates the adjusting frame 8 to make the second roller frame 6 contact the ground. Finally, the operator reinserts the limit pins 10 to limit the angle of the adjusting frame 8. The top of the adjusting frame 8 is connected to the second roller frame 6 through an inner spring damper 11 and a guide rod 12. The roller frame 6 is slidably connected to the guide rod 12. The guide rod 12 is made of 20MnCr5 high-strength alloy steel or 17-4PH stainless steel. The surface of the guide rod 12 is coated with DLC. The inner spring damper 11 reduces the transmission of bumps and vibrations to the workers' hands during transportation, thereby reducing the occurrence of hand pain caused by shock. It also reduces the impact force on the limit pin 10. At the same time, the guide rod 12 can provide radial support and axial guidance, preventing the inner spring damper 11 from breaking and leaking oil due to large radial impacts. There are two of each of the first roller frame 5, the second roller frame 6, the bracket 7, the adjusting frame 8, the limit pin 10, and the inner spring damper 11. There are two sets of pin holes 9 and guide rod 12. The first roller frame 5 and the second roller frame 6 work together to contact the ground, with a large contact area. There are two of each of the first roller frame 5 and the second roller frame 6, for a total of four roller frames, which can effectively improve the stability during movement.

[0030] See Figures 1-3 In the above embodiment, the top of the first telescopic ladder 1 is connected to the second telescopic ladder 2 via a folding ladder hinge 3. When it needs to be rotated and folded, the folding ladder hinge 3 acts as a joint support for rotation. The folding ladder hinge 3 has a built-in locking structure that can automatically lock at multiple angles. If further adjustment is needed, the worker needs to unlock the lock first. When it needs to be extended, the first telescopic ladder 1 and the second telescopic ladder 2 will also pull out the ladder bars section by section. The first telescopic ladder 1 and the second telescopic ladder 2 use friction or spring clips to fix the length of each section. The outer surface of the first telescopic ladder 1 is connected to a connector 4. If the first telescopic ladder 1 and the second telescopic ladder 2 are rotated to an A-shape via the folding ladder hinge 3, the worker can rotate the connector 4 and fasten one end of the connector 4 to the second telescopic ladder 2, thereby forming an A-frame ladder.

[0031] Example 2: Based on the above embodiment one, the following settings are made for ease of operation.

[0032] See Figure 1 In the above embodiment, a round rod handle 13 is connected to the lower part of the inside of the first telescopic ladder 1. Workers can use the round rod handle 13 as a gripping point to pull or push the folding rescue ladder to move.

[0033] The implementation principle of this utility model is as follows: First, when movement is required, the worker first flips the folding rescue ladder over. After the folding rescue ladder is flipped over, the first roller frame 5 contacts the ground. At the same time, the limit pin 10 is pulled out to end the limitation on the adjusting frame 8. Then, the worker rotates the adjusting frame 8 to make the second roller frame 6 contact the ground. Finally, the worker reinserts the limit pin 10 to limit the angle of the adjusting frame 8. The first roller frame 5 and the second roller frame 6 cooperate to contact the ground, with a large contact area. There are two first roller frames and two second roller frames 6, for a total of four roller frames, which can effectively improve the stability during movement. Then, the worker can use the round rod handle 13 as a gripping point to pull or push the folding rescue ladder to move. During the movement, the inner spring damper 11 reduces the transmission of bumps and vibrations to the worker's hands during the handling process, thereby reducing the phenomenon of hand pain caused by shock. It can also reduce the impact force on the limit pin 10. At the same time, the guide rod 12 can play a radial support and axial guidance role, avoiding the inner spring damper 11 from breaking and leaking oil due to large radial impact. When it is necessary to retract, the staff flips the folding rescue ladder back, then pulls out the limit pin 10 and rotates the adjusting frame 8 to be parallel with the first telescopic ladder 1. Then the staff inserts the limit pin 10 back in, thus completing the limiting. The folding telescopic rescue ladder is existing technology, and its design is publicly available, so only a brief description is provided here. When extension is required, the first telescopic ladder 1 and the second telescopic ladder 2 will extend the ladder bars section by section. The first telescopic ladder 1 and the second telescopic ladder 2 use friction or spring clips to fix the length of each section. When rotation and folding are required, the folding ladder hinge 3 acts as a joint support for rotation. The folding ladder hinge 3 has a built-in locking structure that can automatically lock at multiple angles. If further adjustment is needed, the worker must first unlock the lock. If the first telescopic ladder 1 and the second telescopic ladder 2 are rotated to an aligned state through the folding ladder hinge 3, the connecting piece 4 is not required. If the first telescopic ladder 1 and the second telescopic ladder 2 are rotated to an A-shape through the folding ladder hinge 3, the worker rotates the connecting piece 4 and fastens one end of the connecting piece 4 onto the second telescopic ladder 2, thus forming an A-frame ladder. The specific components and principles are not briefly described, and some structures are not shown in the diagram or not shown in detail. The specific content is a publicly available design. Furthermore, for ease of use, the first roller frame 5 and the second roller frame 6 can use casters, brake wheels, etc.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A folding rescue ladder structure, comprising a first telescopic ladder (1), characterized in that: The first telescopic ladder (1) is connected to the top of the first roller frame (5), and the first telescopic ladder (1) is connected to the side of the bracket (7). The top of the bracket (7) is connected to the adjustment frame (8). The outer surface of the adjustment frame (8) and both sides of the outer surface of the bracket (7) are provided with pin holes (9), and the pin holes (9) are connected to the inside of the limit pins (10). The top of the adjustment frame (8) is connected to the second roller frame (6) through the inner spring damper (11) and the guide rod (12).

2. The folding rescue ladder structure according to claim 1, characterized in that: The adjustment frame (8) is rotatably connected to the support (7), and the cross section of the support (7) is fan-shaped.

3. The folding rescue ladder structure according to claim 1, characterized in that: The limiting pin (10) is made of 4340 high-strength alloy steel or 17-4PH stainless steel.

4. The folding rescue ladder structure according to claim 3, characterized in that: The limiting pin (10) is disassembled and connected to the pin hole (9).

5. The folding rescue ladder structure according to claim 1, characterized in that: The second roller frame (6) is slidably connected to the guide rod (12).

6. The folding rescue ladder structure according to claim 5, characterized in that: The guide rod (12) is made of 20MnCr5 high-strength alloy steel or 17-4PH stainless steel, and the surface of the guide rod (12) is coated with DLC.

7. The folding rescue ladder structure according to claim 6, characterized in that: The first roller frame (5), the second roller frame (6), the bracket (7), the adjusting frame (8), the limiting pin (10) and the inner spring damper (11) are all provided in twos, and the pin hole (9) and the guide rod (12) are all provided in two sets.

8. The folding rescue ladder structure according to claim 1, characterized in that: The top of the first telescopic ladder (1) is connected to the second telescopic ladder (2) via a folding ladder hinge (3), and the outer surface of the first telescopic ladder (1) is connected to a connector (4).

9. The folding rescue ladder structure according to claim 8, characterized in that: The first telescopic ladder (1) has a round handle (13) connected to the lower part of its interior.

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