Aerial ladder additional device with emergency slow descending function

Abstract

The invention discloses an aerial ladder additional device with an emergency slow descending function, and relates to the technical field of fire rescue, the aerial ladder additional device comprises a working bucket, and the working bucket comprises a bottom plate; the mounting mechanism is mounted on the bottom plate; the descent control mechanism is integrated on the working bucket, and the mechanism realizes a safe descent control function by utilizing controllable friction force generated between a specific elastic cloth cylinder and descending personnel, so that the rapid evacuation efficiency of disaster victims is remarkably improved; by arranging the material supporting mechanism, the cloth stacked in the folding material collecting mechanism is supported, and the situation that the cloth is stacked to hinder personnel entering is prevented; meanwhile, the cloth is propped open through the synergistic effect of the multiple pull rods, and convenience is provided for people to escape; by arranging the folding material receiving mechanism, the slow descending mechanism is folded and stored below the working bucket; and meanwhile, the intelligent discharging mechanism is matched to detect the ground height in real time, and accurate discharging is conducted according to the detection result so as to meet the use requirements of the working bucket in different height scenes.

Description

Technical Field

[0001] This invention relates to the field of fire rescue technology, and in particular to an auxiliary device for a fire ladder with emergency descent function. Background Technology

[0002] In modern urban fire rescue, fire ladders are core equipment for high-altitude operations, and the design and operational efficiency of their work platforms directly affect the success or failure of personnel evacuation. However, existing ladder systems have significant bottlenecks, specifically limitations in the area and load-bearing capacity of the work platform, as well as inefficient lifting mechanisms. These shortcomings can cause fatal delays in emergency scenarios such as high-rise fires.

[0003] First, the limited area and load-bearing capacity of the working bucket are inherent limitations. A standard fire ladder's working bucket is typically designed to accommodate 2-3 people (approximately 1.5-2 square meters), with a maximum load capacity of no more than 300 kilograms. This spatial constraint stems from the mechanical balance requirements of the ladder structure—an excessively large working bucket increases wind resistance and the risk of center of gravity shift, leading to decreased stability when the ladder is extended. In practice, when there are a large number of trapped people at a fire scene (such as in high-rise apartments or shopping malls), rescuers can only transport them in batches, transferring only a few individuals per round.

[0004] In summary, the inefficiency caused by the physical limitations of fire-fighting ladders creates a vicious cycle, severely restricting their practical effectiveness. Therefore, breaking through this bottleneck has become an urgent direction for upgrading fire-fighting equipment. Summary of the Invention

[0005] This invention proposes an auxiliary device for fire ladders with emergency descent function to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fire ladder attachment with emergency descent function includes a working bucket, the working bucket including a base plate; Also includes: The mounting mechanism is installed on the base plate; The slow-descent mechanism is installed at the bottom of the base plate and includes multiple metal rings 1. A protective cylinder 1 is fixed between the multiple metal rings 1. The protective cylinder 1 is made of abrasion-resistant fabric. Multiple connecting rods are fixed to the inner wall of the metal rings 1. A metal ring 2 is fixed between the multiple connecting rods. An elastic band is fixed to the inner wall of the metal ring 2. An elastic cloth tube is fixed to the inner wall of the multiple elastic bands. The material support mechanism, which is mounted on the base plate, includes multiple tie rods; The folding and collecting mechanism, which is installed at the bottom of the base plate, includes two winding cylinders, and two steel wires are fixed to the outside of the winding cylinders; The intelligent feeding mechanism is installed at the bottom of the base plate and includes multiple rotating shafts. A semi-circular plate is fixed to the bottom end of the rotating shaft, and a semi-circular plate is rotatably connected to the bottom end of the rotating shaft. The connection point between the semi-circular plate and the rotating shaft is located at the top. The distance between the semi-circular plate and the semi-circular plate is greater than the thickness of the metal ring.

[0007] Furthermore, the work bucket also includes a guardrail fixed to the top of the base plate, and one side of the base plate is fixed to the lifting arm of the fire truck.

[0008] Furthermore, the installation mechanism includes a housing fixed to the bottom of the base plate, an opening at the bottom of the housing, a support leg fixed to the bottom of the housing, a groove at the top of the base plate, an installation opening at the bottom of the groove, a metal ring at the top fixed to the inner wall of the installation opening, a cover plate installed at the top of the groove, and the slow-descent mechanism, the folding material receiving mechanism, and the intelligent material discharging mechanism sleeved on the bottom of the housing.

[0009] Furthermore, the descent mechanism also includes a protective cylinder two fixed to the bottom of the lower metal ring one. The protective cylinder two has an outlet on one side, a counterweight plate is fixed to the bottom of the protective cylinder two, and a cushioning cotton is fixed to the top of the counterweight plate. A fixing ring is fixed to the inner wall of the metal ring at the top, and the top of the elastic cloth tube is fixed to the inner wall of the fixing ring.

[0010] Furthermore, the material support mechanism also includes multiple push rod motors fixed to the inner wall of the groove, the output ends of the multiple push rod motors being fixedly connected to the top ends of multiple pull rods respectively, and the multiple pull rods being sleeved inside the elastic cloth cylinder.

[0011] Furthermore, the folding and collecting mechanism also includes two sets of fixing plates fixed to the bottom of the base plate. The two winding cylinders are rotatably connected to the two sets of fixing plates respectively. One end of each winding cylinder is fixed with a pulley. The two pulleys are fitted with belts. A motor plate is fixed to the bottom of the base plate. A motor is fixed to one side of the motor plate. The output end of the motor is fixedly connected to one of the winding cylinders. A connecting plate is fixed to the bottom end of the steel wire. The connecting plate is fixedly connected to the counterweight plate.

[0012] Furthermore, the intelligent feeding mechanism also includes sprockets fixed to the outside of the rotating shaft, and chains are installed on the outside of the plurality of sprockets; A second motor is fixed to the bottom of the base plate, a first gear is fixed to the output end of the second motor, a second gear is meshed on one side of the first gear, and the second gear is fixed to the outside of one of the rotating shafts. The bottom of the base plate is fixed with a plurality of L-shaped rods, the bottom ends of the plurality of L-shaped rods being far apart; The bottom of the counterweight plate has a second groove, and a laser rangefinder sensor is fixed to the inner wall of the second groove. An alarm is fixed to the top of the guardrail.

[0013] Furthermore, it also includes a controller fixed to one side of the base plate, the controller being electrically connected to motor one, motor two and the alarm respectively, and the laser rangefinder being remotely wirelessly connected to the controller.

[0014] Compared with existing technologies, the beneficial effects of this invention are: 1. This invention addresses the problem of limited area and load-bearing capacity of working buckets in fire rescue, making it difficult to carry more people to be rescued. By integrating a slow descent mechanism into the working bucket, this mechanism utilizes the controllable friction generated between a specific elastic cloth tube and the descending personnel to achieve a safe slow descent function, thereby significantly improving the efficiency of rapid evacuation of disaster victims.

[0015] 2. This invention sets up a material support mechanism to open up the stacked fabric in the folding and collecting mechanism, preventing the fabric from piling up and obstructing personnel entry; at the same time, it uses the synergistic effect of multiple pull rods to open up the fabric, providing convenience for personnel escape.

[0016] 3. This invention incorporates a folding material collection mechanism to fold and store the slow-descent mechanism under the work hopper; simultaneously, an intelligent material dispensing mechanism detects the ground height in real time and accurately dispenses material based on the detection results, adapting to the use needs of the work hopper in different height scenarios. This design not only avoids the accumulation of excessively long fabric at the bottom, which could hinder the subsequent evacuation of personnel, but also effectively shortens the escape time for multiple workers. Attached Figure Description

[0017] Figure 1 This is a first-view structural schematic diagram of a fire ladder attachment with emergency descent function proposed in this invention.

[0018] Figure 2 This is a second-view structural diagram of a fire ladder attachment with emergency descent function proposed in this invention.

[0019] Figure 3 This is a schematic diagram of the folding and collecting mechanism of a fire ladder attachment with emergency descent function proposed in this invention.

[0020] Figure 4 This is a cross-sectional structural diagram of the descent mechanism of a fire ladder auxiliary device with emergency descent function proposed in this invention.

[0021] Figure 5 This is a schematic diagram of the intelligent material feeding mechanism of a fire ladder auxiliary device with emergency descent function proposed in this invention.

[0022] Figure 6 for Figure 5 Enlarged structural diagram of point A inside.

[0023] Figure 7 This is a schematic diagram of a semi-circular plate structure for a fire ladder auxiliary device with emergency descent function proposed in this invention.

[0024] In the diagram: 1. Working bucket; 11. Base plate; 12. Guardrail; 2. Mounting mechanism; 21. Shell; 22. Support leg; 23. Opening; 24. Cover plate; 25. Groove one; 3. Slow descent mechanism; 31. Metal ring one; 32. Protective cylinder one; 33. Protective cylinder two; 34. Counterweight plate; 35. Connecting rod; 36. Metal ring two; 37. Elastic band; 38. Elastic cloth sleeve; 39. Buffer cotton; 310. Fixing ring; 4. Material support mechanism; 41. Push rod motor; 42. Pull rod 5. Folding and collecting mechanism; 51. Fixing plate; 52. Winding cylinder; 53. Pulley; 54. Belt; 55. Motor plate; 56. Motor 1; 57. Steel wire; 58. Connecting plate; 6. Intelligent feeding mechanism; 61. Rotating shaft 1; 62. Semicircular plate 1; 63. Semicircular plate 2; 64. Gear 2; 65. Sprocket; 66. Chain; 67. Motor 2; 68. Gear 1; 69. L-shaped rod; 610. Groove 2; 611. Laser rangefinder sensor; 612. Alarm. Detailed Implementation

[0025] 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.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] Example: Refer to Figures 1-7 A fire ladder attachment with emergency descent function includes a working bucket 1, and the working bucket 1 includes a base plate 11; Also includes: Mounting mechanism 2 is mounted on base plate 11; The slow-descent mechanism 3 is installed at the bottom of the base plate 11 and includes multiple metal rings 31. A protective cylinder 32 is fixed between the multiple metal rings 31. The protective cylinder 32 is made of abrasion-resistant fabric. Multiple connecting rods 35 are fixed to the inner wall of the metal rings 31. A metal ring 36 is fixed between the multiple connecting rods 35. An elastic band 37 is fixed to the inner wall of the metal ring 36. An elastic cloth cylinder 38 is fixed to the inner wall of the multiple elastic bands 37. The material support mechanism 4 is mounted on the base plate 11 and includes multiple tie rods 42; The folding and collecting mechanism 5 is installed at the bottom of the base plate 11 and includes two winding cylinders 52, with two steel wires 57 fixed to the outside of the winding cylinders 52. The intelligent feeding mechanism 6 is installed at the bottom of the base plate 11 and includes multiple rotating shafts 61. A semi-circular plate 62 is fixed to the bottom end of the rotating shaft 61, and a semi-circular plate 63 is rotatably connected to the bottom end of the rotating shaft 61. The connection point between the semi-circular plate 63 and the rotating shaft 61 is located at the top. The distance between the semi-circular plate 62 and the semi-circular plate 63 is greater than the thickness of the metal ring 31.

[0029] The work bucket 1 also includes a guardrail 12 fixed to the top of the base plate 11, and one side of the base plate 11 is fixed to the lifting arm of the fire truck.

[0030] The mounting mechanism 2 includes a housing 21 fixed to the bottom of the base plate 11. The bottom of the housing 21 has an opening 23. A support leg 22 is fixed to the bottom of the housing 21. The top of the base plate 11 has a groove 25. The bottom of the groove 25 has an installation opening. A metal ring 31 is fixed to the inner wall of the installation opening. A cover plate 24 is installed on the top of the groove 25. The slow-descent mechanism 3, the folding material receiving mechanism 5, and the intelligent material discharging mechanism 6 are fitted onto the bottom of the housing 21.

[0031] The descent mechanism 3 also includes a protective cylinder 33 fixed to the bottom of the lower metal ring 31. An outlet is provided on one side of the protective cylinder 33. A counterweight plate 34 is fixed to the bottom of the protective cylinder 33, and a cushioning cotton 39 is fixed to the top of the counterweight plate 34. A fixing ring 310 is fixed to the inner wall of the metal ring 31 at the top, and the top of the elastic cloth tube 38 is fixed to the inner wall of the fixing ring 310.

[0032] The material support mechanism 4 also includes multiple push rod motors 41 fixed to the inner wall of the groove 25. The output ends of the multiple push rod motors 41 are respectively fixedly connected to the top ends of multiple pull rods 42, and the multiple pull rods 42 are sleeved inside the elastic cloth cylinder 38.

[0033] The folding and collecting mechanism 5 also includes two sets of fixing plates 51 fixed to the bottom of the base plate 11. Two winding cylinders 52 are rotatably connected to the two sets of fixing plates 51 respectively. One end of the winding cylinder 52 is fixed with a pulley 53. The two pulleys 53 are fitted with belts 54. The bottom of the base plate 11 is fixed with a motor plate 55. One side of the motor plate 55 is fixed with a motor 56. The output end of the motor 56 is fixedly connected to one of the winding cylinders 52. The bottom end of the steel wire 57 is fixed with a connecting plate 58. The connecting plate 58 is fixedly connected to the counterweight plate 34.

[0034] The intelligent feeding mechanism 6 also includes sprockets 65 fixed to the outside of the rotating shaft 61, and chains 66 are installed on the outside of the multiple sprockets 65; A second motor 67 is fixed to the bottom of the base plate 11. A first gear 68 is fixed to the output end of the second motor 67. A second gear 64 meshes with one side of the first gear 68. The second gear 64 is fixed to the outside of one of the rotating shafts 61. Multiple L-shaped rods 69 are fixed to the bottom of the base plate 11, with the bottom ends of the multiple L-shaped rods 69 being far apart; The bottom of the counterweight plate 34 has a groove 610, and a laser rangefinder 611 is fixed to the inner wall of the groove 610. An alarm 612 is fixed to the top of the guardrail 12.

[0035] It also includes a controller fixed to one side of the base plate 11. The controller is electrically connected to motor 1 56, motor 2 67 and alarm 612 respectively. The laser range sensor 611 is remotely wirelessly connected to the controller.

[0036] Working principle: If a fire ladder malfunctions during operation, firefighters inside the high-altitude work platform 1 must be evacuated immediately to prevent accidents. Inside the work hopper 1, firefighters control motors 56 and 67 to operate synchronously via a controller. Motor 56 drives the winding drum 52 to rotate clockwise, releasing the steel wire 57 wound on the outside. Motor 67 drives gear 68 to rotate, which in turn drives shaft 61 to rotate. Shaft 61 then drives semicircular plates 62 and 63 to rotate. Semicircular plate 62 is positioned between the two bottommost metal rings 31, and is positioned opposite the second metal ring from the bottom. The metal ring 31 above 31 is lifted, while the rotation of the semicircular plate 63 releases the metal ring 31 located between the semicircular plate 62 and the semicircular plate 63. The metal ring 31 falls under its own weight, and the protective cylinder 32 folded between the two metal rings 31 unfolds. When the metal ring 31 falls, it drives the metal ring 36 to move down synchronously through the connecting rod 35. The metal ring 36 drives the elastic band 37 to move down, and the elastic band 37 pulls the elastic cloth cylinder 38 to unfold. Semicircular plates 62 and 63 continue to rotate, causing metal ring 31 to release material from bottom to top. Simultaneously, steel wire 57 extends, lowering counterweight plate 34. Laser rangefinder 611 continuously monitors the height above the ground and transmits the data to the controller. When the distance reaches zero, counterweight plate 34 contacts the ground, and the controller shuts down motors 56 and 67, stopping the material release. Then the controller controls the alarm 612 to remind the firefighters, and at the same time starts multiple push rod motors 41 to pull the pull rods 42 to move. When the multiple pull rods 42 move away from each other, they open the top of the elastic cloth cylinder 38. The purpose is to prevent the protective cylinder 32 without material and the elastic cloth without material from folding together and blocking the top, making it difficult for firefighters to enter. After the firefighter enters the interior of the elastic fabric tube 38, friction is generated with it to achieve a slow descent. The elastic band 37 further tightens multiple positions of the elastic fabric tube 38 to cushion the firefighter's descent. After the firefighters descended onto the cushioning cotton 39, they exited through the exit of the protective cylinder 32. When no longer needed, the starting motor 56 drives the winding drum 52 to reverse and wind the steel wire 57. The steel wire 57 drives the counterweight plate 34 to move upward. During the upward movement, multiple metal rings 31 are stacked together, and multiple L-shaped rods 69 make the central axes of multiple metal rings 31 coincide. The top metal ring 31 after unloading contacts the bottom of the semi-circular plate 63. Since the rotation connection point between the semi-circular plate 63 and the rotating shaft 61 is located at the top, when the top of the metal ring 31 pushes the bottom of the semi-circular plate 63, it will cause it to flip upward, thereby resetting multiple metal rings 31. After resetting, the counterweight plate 34 is located above the semi-circular plate 63. Without the downward pushing force, the semi-circular plate 63 will reset by its own gravity. Then, the starting motor 56 is turned off, and the material collection is completed.

[0037] By installing a slow-descent mechanism on the work platform, when the ladder malfunctions, the friction between the elastic cloth tube of the slow-descent mechanism and the workers can be used to achieve a slow descent, thereby quickly evacuating the workers and avoiding safety risks caused by prolonged stay at height.

[0038] By setting up a material support mechanism, the stacked fabric in the folding and collecting mechanism is spread out to prevent the fabric from piling up and obstructing personnel entry; at the same time, the coordinated action of multiple pull rods is used to spread the fabric, facilitating personnel escape.

[0039] By incorporating a folding material collection mechanism, the slow-descent mechanism is folded and stored beneath the work hopper. Simultaneously, an intelligent material dispensing mechanism monitors the ground height in real time and precisely dispenses material based on the detection results, adapting to the work hopper's usage requirements in different height scenarios. This design not only prevents excessively long fabric from piling up at the bottom, hindering subsequent evacuation of personnel, but also effectively shortens the escape time for multiple workers.

[0040] 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.

[0041] It should be noted that the device structure and accompanying drawings of this invention mainly describe the principle of the invention. The technical details of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art, understanding the principles of the invention, can clearly understand the specifics of its power mechanism, power supply system, and control system. The control method described in the application is automatic control via a controller, and the controller's control circuit can be implemented through simple programming by those skilled in the art. The above description only illustrates certain exemplary embodiments of the invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of this invention.

Claims

1. A fire ladder attachment with emergency descent function, comprising a working bucket (1), characterized in that, The working bucket (1) includes a bottom plate (11); Also includes: The mounting mechanism (2) is mounted on the base plate (11); The slow-descent mechanism (3) is installed at the bottom of the base plate (11) and includes multiple metal rings (31). A protective cylinder (32) is fixed between the multiple metal rings (31). The protective cylinder (32) is made of abrasion-resistant fabric. Multiple connecting rods (35) are fixed to the inner wall of the metal rings (31). A metal ring (36) is fixed between the multiple connecting rods (35). An elastic band (37) is fixed to the inner wall of the metal ring (36). An elastic cloth cylinder (38) is fixed to the inner wall of the multiple elastic bands (37). The material support mechanism (4) is mounted on the base plate (11) and includes multiple tie rods (42). The folding and collecting mechanism (5) is installed at the bottom of the base plate (11) and includes two winding cylinders (52), with two steel wires (57) fixed to the outside of the winding cylinders (52). The intelligent feeding mechanism (6) is installed at the bottom of the base plate (11) and includes multiple rotating shafts (61). The bottom end of the rotating shaft (61) is fixed with a semi-circular plate (62). The bottom end of the rotating shaft (61) is rotatably connected with a semi-circular plate (63). The connection point between the semi-circular plate (63) and the rotating shaft (61) is located at the top. The distance between the semi-circular plate (62) and the semi-circular plate (63) is greater than the thickness of the metal ring (31).

2. The fire ladder attachment with emergency descent function according to claim 1, characterized in that, The working bucket (1) also includes a guardrail (12) fixed to the top of the base plate (11), one side of which is fixed to the lifting arm of the fire truck.

3. A fire ladder attachment with emergency descent function according to claim 2, characterized in that, The installation mechanism (2) includes a housing (21) fixed to the bottom of the base plate (11). The bottom of the housing (21) has an opening (23). The bottom of the housing (21) is fixed with a support leg (22). The top of the base plate (11) has a groove (25). The bottom of the groove (25) has an installation port. The metal ring (31) at the top is fixed to the inner wall of the installation port. The top of the groove (25) is fitted with a cover plate (24). The slow-descent mechanism (3), the folding material receiving mechanism (5), and the intelligent material discharging mechanism (6) are fitted onto the bottom of the housing (21).

4. A fire ladder attachment with emergency descent function according to claim 3, characterized in that, The installation mechanism (2) includes a housing (21) fixed to the bottom of the base plate (11). The bottom of the housing (21) has an opening (23). The bottom of the housing (21) is fixed with a support leg (22). The top of the base plate (11) has a groove (25). The bottom of the groove (25) has an installation port. The metal ring (31) at the top is fixed to the inner wall of the installation port. The top of the groove (25) is fitted with a cover plate (24). The slow-descent mechanism (3), the folding material receiving mechanism (5), and the intelligent material discharging mechanism (6) are fitted onto the bottom of the housing (21).

5. A fire ladder attachment with emergency descent function according to claim 4, characterized in that, The material support mechanism (4) also includes a plurality of push rod motors (41) fixed to the inner wall of the groove (25). The output ends of the plurality of push rod motors (41) are respectively fixedly connected to the top ends of the plurality of pull rods (42). The plurality of pull rods (42) are sleeved inside the elastic cloth cylinder (38).

6. A fire ladder attachment with emergency descent function according to claim 5, characterized in that, The folding and collecting mechanism (5) also includes two sets of fixing plates (51) fixed to the bottom of the base plate (11). The two winding cylinders (52) are rotatably connected to the two sets of fixing plates (51) respectively. One end of the winding cylinder (52) is fixed with a pulley (53). The two pulleys (53) are fitted with belts (54). The bottom of the base plate (11) is fixed with a motor plate (55). One side of the motor plate (55) is fixed with a motor (56). The output end of the motor (56) is fixedly connected to one of the winding cylinders (52). The bottom end of the steel wire (57) is fixed with a connecting plate (58). The connecting plate (58) is fixedly connected to the counterweight plate (34).

7. A fire ladder attachment with emergency descent function according to claim 6, characterized in that, The intelligent feeding mechanism (6) also includes a sprocket (65) fixed to the outside of the rotating shaft (61), and a chain (66) is installed on the outside of the plurality of sprockets (65). The bottom of the base plate (11) is fixed with a second motor (67), and a first gear (68) is fixed at the output end of the second motor (67). A second gear (64) meshes with one side of the first gear (68), and the second gear (64) is fixed to the outside of one of the rotating shafts (61). The bottom of the base plate (11) is fixed with a plurality of L-shaped rods (69), the bottom ends of the plurality of L-shaped rods (69) being far apart; The counterweight plate (34) has a groove 2 (610) at the bottom, and a laser rangefinder (611) is fixed on the inner wall of the groove 2 (610). An alarm (612) is fixed on the top of the guardrail (12).

8. A fire ladder attachment with emergency descent function according to claim 7, characterized in that, It also includes a controller fixed on one side of the base plate (11), which is electrically connected to motor one (56), motor two (67) and alarm (612) respectively, and the laser range sensor (611) is remotely wirelessly connected to the controller.

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