Fire ladder

Abstract

The utility model relates to the technical field of fire ladders, in particular to a fire ladder, which comprises a first ladder assembly and a second ladder assembly, the first ladder assembly is in sliding connection with the second ladder assembly, the bottom of one side of the first ladder assembly is provided with a concave part, and the bottom of one side of the second ladder assembly is fixedly provided with a winch. The two shaft ends of the winch are fixedly connected with steel cables for pulling the first ladder frame to slide; wherein a self-locking assembly is arranged in the top of the second ladder assembly, the second ladder assembly can be fixed with the first ladder assembly after sliding through the self-locking assembly, and the first ladder assembly and the second ladder assembly can be quickly clamped and fixed after sliding together through the self-locking assembly; the portable ladder has the advantages that on one hand, the second ladder assembly can be stably fixed to prevent slipping by clamping the clamping blocks and the buckles, on the other hand, the pair of ladder assemblies can be fixed together to prolong the overall length, and the portable ladder is convenient to carry and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of fire ladders, in particular to a fire ladder. Background Art

[0002] The self-locking hanger of the fire ladder is a device used to fix the fire ladder. On the one hand, it ensures the safety when using the fire ladder. On the other hand, it is convenient to fix a group of ladder frames together to extend the fire ladder. This design can make it easier for firefighters to quickly climb to high-rise areas, which plays an important role in extinguishing fires.

[0003] In order to put out the fire faster and rescue the trapped people, it is necessary to use a fire ladder self-locking hanger for rescue operations. For example, the prior art Chinese patent announcement number "CN217461996U" discloses a fire ladder, including: two ladders arranged in parallel, with racks facing each other on the vertical poles of the ladders, and hooks facing outwards at the top of the ladders; a driving device, arranged between the two ladders, including a clamping plate slidingly arranged on the vertical poles, a rotating shaft passing through the clamping plate, a gear sleeved on the rotating shaft and meshing with the rack, and a motor driving the rotating shaft to rotate. Users standing on the fire ladder can move up and down without consuming physical strength, which can not only save physical strength for firefighters to use for firefighting operations, but also facilitate the escape of people with poor physical strength.

[0004] Some fire ladders extend the overall length of the ladder by telescoping a pair of ladders. However, in actual operation, considering that similar fire ladders are only driven and fixed by gears between a pair of ladders, there is not only a lack of effective fixing measures between the pair of ladders, but also it is not conducive to bearing the weight of the users. Under frequent use, the pair of ladders may become unstable and slide, which has a high risk factor and low practicality. Utility Model Content

[0005] The utility model aims to solve the above-mentioned shortcoming of lacking effective fixing measures in the prior art and proposes a fire ladder.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fire ladder is designed, comprising a first ladder frame and a second ladder frame, wherein the first ladder frame and the second ladder frame are slidably connected, a recess is provided at the bottom of one side of the first ladder frame, a winch is fixedly installed at the bottom of one side of the second ladder frame, and steel cables for pulling the first ladder frame to slide are fixedly connected to the two shaft ends of the winch;

[0008] A self-locking assembly is provided on the top of the second ladder frame, and the self-locking assembly can be used to fix the first ladder frame to the second ladder frame after sliding.

[0009] Furthermore, a plurality of traction rings are fixedly installed at the bottom of the first ladder frame and the second ladder frame, and the steel cable passes through the traction ring and is fixedly connected to a side of the first ladder frame close to the winch.

[0010] Furthermore, a pair of guide wheels are rotatably connected to the two sides of the bottom of the first ladder frame, and an unlocking rod is slidably connected between the first ladder frame below the guide wheels and the second ladder frame, and the guide wheels are slidably connected to the unlocking rod.

[0011] Furthermore, the self-locking assembly includes a card block, which is fixedly installed on the side of the bottom of the first ladder frame and is located above the unlocking rod. A handle is fixedly installed on the bottom of the unlocking rod, and a first spring is arranged on the outer periphery of the handle. One end of the first spring is fixedly connected to the handle, and the other end thereof is in conflict with the side of the first ladder frame.

[0012] Furthermore, a mounting groove is penetrated on one side of the top of the second ladder frame, a pair of buckles are rotatably connected in the mounting groove, sector gears are fixedly installed on one end of the facing surfaces of the pair of buckles, the pair of sector gears are meshed and rotated, and the pair of buckles can engage the block.

[0013] Furthermore, a horizontal plate is fixedly installed in the installation groove, and a second spring is fixed on one end of a pair of buckles that are away from each other. The other end of the second spring is respectively fixedly connected to the inner side surface of the installation groove and the top of the horizontal plate. A resist plate is provided at the bottom of the buckle, and the unlocking rod can resist the resist plate.

[0014] The utility model provides a fire ladder, which has the beneficial effect that a self-locking component is provided in the second ladder frame, and the self-locking component can enable the first ladder frame and the second ladder frame to be quickly clamped and fixed after sliding together. The advantage is that on the one hand, the second ladder frame can be stably fixed to prevent slipping by clamping the clamping block and the buckle, and on the other hand, a pair of ladder frames can be fixed together to extend the overall length, which is convenient to carry and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the winch of the utility model;

[0017] Figure 3 It is a cross-sectional view of the guide wheel of the utility model;

[0018] Figure 4 It is a cross-sectional view of the buckle of the utility model.

[0019] In the figure: 1, first ladder frame; 11, recessed portion; 2, second ladder frame; 21, mounting groove; 3, winch; 31, steel cable; 32, traction ring; 4, self-locking assembly; 41, block; 42, handle; 43, first spring; 44, buckle; 45, sector gear; 46, cross plate; 47, spring; 48, stop plate; 5, guide wheel; 6, unlocking lever. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 A fire ladder comprises a first ladder frame 1 and a second ladder frame 2, wherein the first ladder frame 1 and the second ladder frame 2 are slidably connected to each other, a recessed portion 11 is provided at the bottom of one side of the first ladder frame 1, a winch 3 is fixedly installed at the bottom of one side of the second ladder frame 2, and a steel cable 31 for pulling the first ladder frame 1 to slide is fixedly connected to the two axial ends of the winch 3, the recessed portion 11 is used to clamp objects such as railings for fixing the fire ladder, a battery is fixedly installed next to the bottom of the second ladder frame 2, and the battery is electrically connected to the winch 3, and a control unit is fixedly installed on the side of the second ladder frame 2, and the control unit is electrically connected to the winch 3.

[0022] A self-locking assembly 4 is provided at the top of the second ladder frame 2 , and the self-locking assembly 4 can fix the first ladder frame 1 to the second ladder frame 2 after sliding.

[0023] Furthermore, a plurality of traction rings 32 are fixedly installed at the bottom of the first ladder frame 1 and the second ladder frame 2, and the steel cable 31 passes through the traction ring 32 and is fixedly connected to the side of the first ladder frame 1 close to the winch 3. The winch 3 is used to reel in the steel cable 31 to lift the first ladder frame 1 upward so that it is close to the top of the second ladder frame 2.

[0024] Furthermore, a pair of guide wheels 5 are rotatably connected on both sides of the bottom of the first ladder frame 1, and an unlocking rod 6 is slidably connected between the first ladder frame 1 and the second ladder frame 2 below the guide wheels 5. The guide wheels 5 and the unlocking rod 6 are slidably connected to each other, and the guide wheels 5 and the unlocking rod 6 are used to reduce the friction between the first ladder frame 1 and the second ladder frame 2, so as to facilitate the sliding of the first ladder frame 1 and facilitate rapid sliding between the pair of ladder frames.

[0025] It should be noted that the other end of the unlocking rod 6 is slidably connected to the mounting groove 21, and this end of the unlocking rod 6 is provided with a stopper in the mounting groove 21, which prevents the unlocking rod 6 from sliding down and detaching from the first ladder frame 1.

[0026] In more detail, the self-locking assembly 4 includes a card block 41, which is fixedly mounted on the side of the bottom of the first ladder frame 1 and is located above the unlocking rod 6. A handle 42 is fixedly mounted on the bottom of the unlocking rod 6, and a first spring 43 is sleeved on its periphery. One end of the first spring 43 is fixedly connected to the handle 42, and the other end thereof is in conflict with the side of the first ladder frame 1. The unlocking rod 6 is not only used for reducing friction as mentioned above, but also for Figure 4 As shown, the handle 42 pushes the unlocking rod 6 to slide so that it contacts and pushes the abutment plate 48 to achieve the effect of contact self-locking.

[0027] In general, a mounting groove 21 is penetrated on one side of the top of the second ladder frame 2, and a pair of clips 44 are rotatably connected in the mounting groove 21. Fan gears 45 are fixedly installed on one end of the facing surfaces of the pair of clips 44. The pair of fan gears 45 are meshed and rotated. The pair of clips 44 can be clamped with the clamping block 41, and one end of the pair of clips 44 is a right-angled triangle structure.

[0028] Finally, a horizontal plate 46 is fixedly installed in the installation groove 21, and a second spring 47 is fixed at one end of a pair of the buckles 44 that are away from each other. The other end of the second spring 47 is fixedly connected to the inner side surface of the installation groove 21 and the top of the horizontal plate 46 respectively. A resist plate 48 is provided at the bottom of the buckle 44, and the unlocking rod 6 can resist the resist plate 48. When the block 41 is snapped into the pair of the buckles 44, the buckle 44 can fix the block 41 under the support of the pair of the springs 47, so that the first ladder frame 1 can be fixed to the second ladder frame 2 through the self-locking assembly 4 after sliding.

[0029] It should be noted that when the first ladder frame 1 needs to be disengaged, the winch 3 loosens the steel cable 31, pushes the unlocking rod 6 to slide upward to contact and push the abutment plate 48, and then the pair of sector gears 45 mesh and rotate, causing one side of a pair of buckles 44 to rotate away from each other, and then the block 41 disengages from the mounting groove 21.

[0030] Working method: When working, the second ladder frame 2 is lifted, and the winch 3 drives the steel cable 31 to make the first ladder frame 1 slide upward and rise, and then the block 41 is clamped into a pair of buckles 44 to complete the fixation. When the first ladder frame 1 needs to be retracted, the winch 3 releases the steel cable 31 to push the unlocking rod 6 to make it slide upward and push the abutment plate 48, so that a pair of fan-shaped gears 45 mesh and rotate, and the first ladder frame 1 slides downward by the action of its own gravity to make the block 41 disengage from the mounting groove 21 to complete the retraction.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fire ladder, comprising a first ladder frame (1) and a second ladder frame (2), characterized in that: The first ladder frame (1) and the second ladder frame (2) are slidably connected, a recessed portion (11) is provided at the bottom of one side of the first ladder frame (1), a winch (3) is fixedly installed at the bottom of one side of the second ladder frame (2), and two shaft ends of the winch (3) are fixedly connected with steel cables (31) for pulling the first ladder frame (1) to slide; A self-locking component (4) is provided at the top of the second ladder frame (2), and the self-locking component (4) enables the first ladder frame (1) to be fixed to the second ladder frame (2) after sliding.

2. A fire ladder according to claim 1, characterized in that: A plurality of traction rings (32) are fixedly mounted at the bottom of the first ladder frame (1) and the second ladder frame (2); the steel cable (31) passes through the traction ring (32) and is fixedly connected to a side of the first ladder frame (1) close to the winch (3).

3. A fire ladder according to claim 2, characterized in that: A pair of guide wheels (5) are rotatably connected to the two sides of the bottom of the first ladder frame (1); an unlocking rod (6) is slidably connected between the first ladder frame (1) located below the guide wheels (5) and the second ladder frame (2); and the guide wheels (5) are slidably connected to the unlocking rod (6).

4. A fire ladder according to claim 3, characterized in that: The self-locking assembly (4) comprises a clamping block (41), the clamping block (41) being fixedly mounted on the side surface of the bottom of the first ladder frame (1) and located above the unlocking rod (6), a handle (42) being fixedly mounted on the bottom of the unlocking rod (6), and a first spring (43) being sleeved on the outer periphery thereof, one end of the first spring (43) being fixedly connected to the handle (42), and the other end of the first spring (43) being in contact with the side surface of the first ladder frame (1).

5. A fire ladder according to claim 4, characterized in that: A mounting groove (21) is passed through one side of the top of the second ladder frame (2), a pair of buckles (44) are rotatably connected in the mounting groove (21), sector gears (45) are fixedly mounted on one end of the facing surfaces of the pair of buckles (44), the pair of sector gears (45) mesh and rotate, and the pair of buckles (44) can engage the clamping block (41).

6. A fire ladder according to claim 5, characterized in that: A transverse plate (46) is fixedly installed in the installation groove (21); a second spring (47) is fixed to the opposite ends of a pair of buckles (44); the other ends of the second spring (47) are respectively fixedly connected to the inner side surface of the installation groove (21) and the top of the transverse plate (46); a resist plate (48) is provided at the bottom of the buckle (44), and the unlocking rod (6) can resist the resist plate (48).

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