Auxiliary ladder for aerial ladder, aerial ladder device and fire truck

Abstract

The present invention discloses an auxiliary ladder for a cloud ladder, a cloud ladder device and a fire truck. The auxiliary ladder is used to be connected to a walkway of a fire truck. The auxiliary ladder includes a pedal assembly, a connecting rod mechanism and a frame. The frame is fixedly arranged on the walkway. The pedal assembly is connected to the frame through a connecting rod mechanism. The cloud ladder device includes an auxiliary ladder and a cloud ladder. The auxiliary ladder is connected to the cloud ladder. The cloud ladder is used to be rotatably connected to the walkway of the fire truck. The cloud ladder can rotate on the walkway of the fire truck through a turntable. The auxiliary ladder can move with the cloud ladder by being fixedly connected to the cloud ladder. The fire truck is provided with a cloud ladder device. When the fire truck performs rescue work, firefighters and rescued persons can go up and down the cloud ladder and move to the walkway through the auxiliary ladder, which ensures the safety and comfort of firefighters and rescued persons going up and down the cloud ladder. At the same time, the speed of personnel going up and down the cloud ladder is also improved, thereby improving the overall rescue speed.

Description

Technical Field

[0001] The invention relates to the field of fire fighting equipment, in particular to an auxiliary ladder for a ladder, a ladder device and a fire fighting truck. Background Art

[0002] like Figure 1-2 As shown in the figure, as a very important rescue equipment, the ladder truck fire fighting is widely used at home and abroad. At present, the main operation mode of the ladder truck is: a working bucket for manning is installed at the top of the ladder, and the ladder frame is lifted and extended to reach the working height, so as to transport firefighters and firefighting equipment to high altitude, or rescue trapped people from high altitude. The rescued people can only climb up and down the ladder frame through the working bucket or the relevant personnel themselves. Ladder trucks with a height of 42 meters and above are basically equipped with pulleys, using the ladder frame as a guide rail, sliding up and down through the traction of the wire rope, and the lifting bucket can slide quickly along the ladder truck, so that the staff or rescued people can be quickly transported at high altitude and on the ground. However, ladder trucks with a height of 32 meters or less are rarely equipped with pulleys. Therefore, when implementing rescue operations, rescuers of this type of ladder truck generally enter the working bucket from the ladder in the middle of the vehicle or the fixed pedal. After the rescue, the working bucket is first lowered close to the ground to transport the rescued persons to the ground. If there are many persons to be rescued, the rescued persons are required to climb the root of the ladder frame to the turntable, pass the walkway and then reach the ground. Since the root of the ladder frame is usually set at the rear of the walkway of the fire truck, it is difficult for the rescued persons to climb at the transition point between the turntable and the ladder frame, and they are easy to fall from the rear of the walkway, which cannot guarantee the safety and comfort of the persons going up and down, and will also affect the rescue speed and reduce the rescue efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide an auxiliary ladder for a ladder, a ladder device and a fire truck in order to solve the problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An auxiliary ladder for a ladder, used to connect with a walkway of a fire truck, comprising a pedal assembly, a connecting rod mechanism and a frame;

[0006] The frame is fixedly arranged on the walking platform, and the pedal assembly is connected with the frame through a connecting rod mechanism.

[0007] Through the above structure, the auxiliary ladder composed of the pedal assembly, the connecting rod mechanism and the frame is used on the walkway of the fire truck. When the fire truck is carrying out rescue, the auxiliary ladder can facilitate firefighters or rescued persons to get on and off the vehicle, ensuring the safety of firefighters and rescued persons and improving the practicality and comfort of the fire truck.

[0008] As a preferred solution of the present invention, the pedal assembly includes at least two pedals. Through the above structure, the firefighters and the rescued persons can climb up the ladder.

[0009] As a preferred embodiment of the present invention, the connecting rod mechanism includes a first active rod, a first driven rod and a first connecting rod. The first connecting rod, the first active rod, the first driven rod and the frame are connected to form a parallelogram connecting rod mechanism. The first active rod is connected to the ladder, the pedal assembly is connected to the first connecting rod, and the first driven rod is connected to the first connecting rod. Through the above structure, the frame serves as a fixed rod of the parallelogram connecting rod mechanism. When the first active rod moves, the first connecting rod and the first driven rod move accordingly, thereby driving the pedal assembly to change its shape, thereby meeting the use requirement of climbing the ladder through the pedal assembly. At the same time, by adopting the parallelogram connecting rod mechanism, the pedal assembly always moves horizontally and does not rotate itself, so that the pedal assembly itself is always located on a horizontal plane, which is convenient for use. The connection between two components in the present invention refers to both direct connection and indirect connection between the two components.

[0010] As a preferred embodiment of the present invention, the connecting rod mechanism also includes a second connecting rod and a mounting rod, the mounting rod is used to be fixedly connected to the ladder, one end of the second connecting rod is hinged to the first active rod, and the other end of the second connecting rod is hinged to the mounting rod. Through the above structure, the mounting rod can rotate following the movement of the ladder, the line between the hinge point of the second connecting rod and the mounting rod and the rotating shaft of the mounting rod is the virtual second active rod, the line between the other hinge point of the second connecting rod and the rotating shaft of the first active rod is the virtual second driven rod, the line between the rotating shaft of the mounting rod and the rotating shaft of the first active rod is the virtual fixed rod, the virtual second active rod, the virtual second driven rod, the virtual fixed rod and the second connecting rod form a planar four-bar mechanism, when the mounting rod rotates following the rotation of the ladder, the virtual second active rod will move with the mounting rod, and drive the virtual second driven rod to rotate through the second connecting rod. Since the second driven rod is relatively fixed to the first active rod, the second active rod will rotate with the rotation of the mounting rod, so that the pedal assembly will move horizontally with the rotation of the ladder, thereby opening or closing the pedal assembly.

[0011] Furthermore, during installation, there is a gap between the rotation axis of the installation rod and the hinge point between the second connecting rod and the installation rod.

[0012] As a preferred embodiment of the present invention, the auxiliary ladder further comprises a handrail, which is fixedly connected to the connecting rod mechanism. Through the above structure, the handrail provides a support for the firefighters and the rescued persons when they go up and down the auxiliary ladder, ensuring the safety of the persons when they go up and down the auxiliary ladder. The handrail can also be opened or retracted following the translation of the connecting rod mechanism, which can save space.

[0013] As a preferred solution of the present invention, the auxiliary ladder includes a connecting member, the connecting member includes a first pin, and the pedal assembly and the connecting rod mechanism are hinged through the first pin. Through the above structure, the pin can realize the movement between the pedal assembly and the connecting rod mechanism.

[0014] A ladder device comprises a ladder and the auxiliary ladder, wherein the auxiliary ladder is connected to the ladder, and the ladder is used to be rotatably connected to a walkway of a fire truck.

[0015] Through the above structure, the auxiliary ladder is fixedly connected to the aerial ladder and can move with the aerial ladder. When the fire truck is carrying out rescue work, firefighters and rescued persons can go up and down the aerial ladder and move to the walkway through the auxiliary ladder, ensuring the safety and comfort of firefighters and rescued persons going up and down the aerial ladder, while also increasing the speed of personnel going up and down the aerial ladder, thereby improving the overall rescue speed.

[0016] As a preferred solution of the present invention, a turntable is provided at the bottom of the ladder, and the turntable is rotatably connected to the walkway. Through the above structure, the ladder can be rotated on the walkway of the fire truck through the turntable.

[0017] As a preferred solution of the present invention, the connecting member further comprises a second pin shaft, and the ladder is connected to the connecting rod mechanism via the second pin shaft;

[0018] When the ladder is rotating, it is used to drive the pedal assembly to move through the connecting rod mechanism. Through the above structure, the connection between the ladder and the connecting rod mechanism is achieved through the second pin shaft.

[0019] A fire truck has the above-mentioned ladder device on its body, and the ladder device is rotatably connected to the fire truck.

[0020] Through the above structure, a fire truck equipped with a ladder device can perform rescue work through the ladder device, so that firefighters and rescued persons can move between the ladder and the fire truck through the auxiliary ladder of the ladder device, ensuring the safety and comfort of firefighters and rescued persons going up and down the ladder.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] The auxiliary ladder composed of a pedal assembly, a connecting rod mechanism and a frame is used on the walkway of a fire truck. When the fire truck is conducting a rescue, the auxiliary ladder can facilitate firefighters or rescued persons to get on and off the vehicle, ensuring the safety of firefighters and rescued persons and improving the practicality and comfort of the fire truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a fire truck ladder device in the prior art.

[0024] Figure 2It is a structural schematic diagram of a fire truck ladder device in the prior art.

[0025] Figure 3 It is a schematic structural diagram of the present invention when the ladder device is retracted.

[0026] Figure 4 yes Figure 3 A partial enlarged view of area A.

[0027] Figure 5 It is an exploded view of the auxiliary ladder of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the present invention when the ladder device is in an opened state.

[0029] Figure 7 It is a structural schematic diagram of the auxiliary ladder of the present invention in an open state.

[0030] Figure 8 It is a structural schematic diagram of the auxiliary ladder of the present invention in a retracted state.

[0031] Fig. 9 Schematic diagram of the connecting rod mechanism of the present invention.

[0032] Fig.10 It is a structural schematic diagram of a fire truck according to the present invention.

[0033] Fig.11 It is a structural schematic diagram of a fire truck according to the present invention.

[0034] Icons: 1-turntable; 2-walkway; 3-ladder; 4-ladder step; 5-outer handrail; 6-inner handrail; 7-frame; 8-first driven rod; 9-first pedal; 10-second pedal; 11-third pedal; 12-first active rod; 13-second connecting rod; 14-mounting rod; 15-second pin; 16-first pin; 17-first connecting rod; 18-virtual second active rod; 19-virtual second driven rod; 20-virtual fixed rod; 21-fire truck. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] Example

[0038] like Figure 3-11As shown, this embodiment provides an auxiliary ladder for a ladder, the auxiliary ladder is used on a walkway 2 of a fire truck 21, and the auxiliary ladder includes a pedal assembly, a connecting rod mechanism and a frame 7;

[0039] The connecting member includes a first pin shaft 16 and a second pin shaft 15. Specifically, the first pin shaft 16 is a short pin shaft, and the second pin shaft 15 is a long pin shaft;

[0040] The connecting rod mechanism includes a first active rod 12, a first driven rod 8 and a first connecting rod 17. The frame 7 is fixed on the ladder 3 of the fire truck 21. Specifically, the frame 7 is a pedal at the turntable; the two ends of the first connecting rod 17 are respectively hinged with the first active rod 12 and the first driven rod 8 through the first pin shaft 16. The first active rod 12, the frame 7, the first driven rod 8 and the first connecting rod 17 form a parallelogram connecting rod mechanism. The frame 7 is a fixed rod of the parallelogram connecting rod mechanism. When the first active rod 12 moves, the first connecting rod 17 and the first driven rod 8 move accordingly. At the same time, the frame 7 is located at the bottom of the connecting rod mechanism, which can provide a transition place for firefighters and rescued persons when they go up and down the auxiliary ladder, thereby improving the comfort of the auxiliary ladder;

[0041] There are two sets of parallelogram linkage mechanisms, the pedal assemblies are connected to the two sets of parallelogram linkage mechanisms, and the two sets of parallelogram linkage mechanisms are arranged opposite to each other.

[0042] The pedal assembly is fixedly connected to the first connecting rod 17, and the pedal assembly includes a first pedal 9, a second pedal 10 and a third pedal 11. The first pedal 9 is located at the top of the connecting rod mechanism, the second pedal 10 is located at the lower end of the first pedal 9, and the third pedal 11 is located at the lower end of the second pedal 10;

[0043] The auxiliary ladder further includes a handrail, which includes an inner handrail 6 and an outer handrail 5. The inner handrail 6 and the outer handrail 5 are located on the same side of the auxiliary ladder, the inner handrail 6 is fixedly connected to the first active rod 12, and the bottom of the outer handrail 5 is fixedly connected to the frame 7;

[0044] The connecting rod mechanism also includes a second connecting rod 13 and a mounting rod 14. The mounting rod 14 is used to be fixedly connected to the ladder 3. One end of the second connecting rod 13 is hinged to the first active rod 12 through a second pin shaft 15, and the other end of the second connecting rod 13 is hinged to the mounting rod 14 through a second pin shaft 15. The mounting rod 14 can rotate following the movement of the ladder 3, and there is a gap between the rotating shaft of the mounting rod 14 and the hinge point of the second connecting rod 13 and the mounting rod 14. The line between the hinge point of the second connecting rod 13 and the mounting rod 14 and the rotating shaft of the mounting rod 14 is a virtual second active rod 18, the line between the other hinge point of the second connecting rod 13 and the rotating shaft of the first active rod 12 is a virtual second driven rod 19, and the line between the rotating shaft of the mounting rod 14 and the rotating shaft of the first active rod 12 is a virtual fixed rod 20. The virtual second active rod 18, the virtual second driven rod 19, the virtual fixed rod 20 and the second connecting rod 13 form a planar four-bar mechanism. When the mounting rod 14 moves following the ladder 3, the virtual second active rod 18 will move, and the second connecting rod 13 and the virtual second driven rod 19 will move together to realize the following movement between the connecting rod mechanism and the ladder 3.

[0045] This embodiment also provides a ladder device, including the auxiliary ladder, and also includes a ladder 3, the ladder 3 is located on the platform 2 of the fire truck 21, the ladder 3 includes a turntable 1, the turntable 1 is rotatably connected to the platform 2, and the auxiliary ladder is fixedly connected to the ladder 3;

[0046] The side of the frame 7 away from the inner armrest 6 and the outer armrest 5 is fixedly connected to the turntable 1 .

[0047] This embodiment further provides a fire truck 21 , on which the above-mentioned ladder device is provided, and the ladder device is rotatably connected to the fire truck 21 .

[0048] The auxiliary ladder for a ladder, a ladder device and a fire truck 21 provided in this embodiment have the following beneficial effects:

[0049] The auxiliary ladder composed of a pedal assembly, a connecting rod mechanism and a frame is used on the walkway 2 of the fire truck 21. When the fire truck 21 is performing a rescue, the auxiliary ladder can facilitate firefighters or rescued persons to get on and off the vehicle, thereby ensuring the safety of firefighters and rescued persons and improving the practicality and comfort of the fire truck 21.

[0050] The handrail includes an inner handrail 6 and an outer handrail 5. The inner handrail 6 and the outer handrail 5 are located on the same side of the auxiliary ladder. The inner handrail 6 is fixedly connected to the first active rod 12. The bottom of the outer handrail 5 is fixedly connected to the frame 7. The inner handrail 6 and the outer handrail 5 provide support for firefighters and rescued persons when they go up and down the auxiliary ladder, ensuring the safety of personnel when going up and down the auxiliary ladder.

[0051] The ladder device includes an auxiliary ladder and a ladder 3. The ladder 3 is located on the walkway 2 of the fire truck 21. The turntable 1 of the ladder 3 is rotatably connected to the walkway 2, and the auxiliary ladder is fixedly connected to the ladder 3. The ladder 3 can rotate on the walkway 2 of the fire truck 21 through the turntable 1. The auxiliary ladder can move with the ladder 3 by being fixedly connected to the ladder 3. When the fire truck 21 is performing rescue work, firefighters and rescued persons can go up and down the ladder 3 and move to the walkway 2 through the auxiliary ladder, which ensures the safety and comfort of firefighters and rescued persons going up and down the ladder 3, while also improving the speed of people going up and down the ladder 3, thereby improving the overall rescue speed.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary ladder for a ladder, used for connecting to a walkway (2) of a fire truck, characterized in that: It comprises a pedal assembly, a connecting rod mechanism and a frame (7); The frame (7) is arranged on the walkway (2); the pedal assembly is connected to the frame (7) via the connecting rod mechanism; the connecting rod mechanism comprises a first active rod (12), a first driven rod (8) and a first connecting rod (17); the first connecting rod (17), the first active rod (12), the first driven rod (8) and the frame (7) are connected to form a parallelogram connecting rod mechanism; the first active rod (12) is connected to the ladder; the pedal assembly is connected to the first connecting rod (17); and the first driven rod (8) is connected to the first connecting rod (17); There are two sets of parallelogram linkage mechanisms, the pedal assembly is connected to the two sets of parallelogram linkage mechanisms, and the two sets of parallelogram linkage mechanisms are arranged opposite to each other; The pedal assembly includes at least two pedals; The frame (7) is a pedal at the turntable. The frame (7) is located at the bottom of the connecting rod mechanism and can provide a transition place for firefighters and rescued persons when they go up and down the auxiliary ladder. The auxiliary ladder also includes a handrail, which includes an inner handrail (6) and an outer handrail (5), the inner handrail (6) and the outer handrail (5) are located on the same side of the auxiliary ladder, the inner handrail (6) is fixedly connected to the first active rod (12), and the bottom of the outer handrail (5) is fixedly connected to the frame (7).

2. The auxiliary ladder for a ladder according to claim 1, characterized in that: The connecting rod mechanism also includes a second connecting rod (13) and a mounting rod (14), wherein the mounting rod (14) is used for being fixedly connected to the ladder (3), one end of the second connecting rod (13) is hinged to the first active rod (12), and the other end of the second connecting rod (13) is hinged to the mounting rod (14).

3. A ladder device, characterized in that: It comprises a ladder (3) and the auxiliary ladder described in any one of claims 1 to 2, wherein the auxiliary ladder is connected to the ladder (3), and the ladder (3) is used to be rotatably connected to the walkway (2) of the fire truck.

4. A ladder device according to claim 3, characterized in that: A turntable (1) is provided at the bottom of the ladder (3), and the turntable (1) is rotatably connected to the walkway (2).

5. A ladder device according to claim 3, characterized in that: It also includes a connecting member, the connecting member includes a first pin shaft (16), the pedal assembly and the connecting rod mechanism are hinged via the first pin shaft (16), the connecting member also includes a second pin shaft (15), the ladder (3) and the connecting rod mechanism are connected via the second pin shaft (15); When the ladder (3) rotates, it is used to drive the pedal assembly to move through the connecting rod mechanism.

6. A fire truck, characterized in that: The vehicle body is provided with a ladder device as described in any one of claims 3 to 5, and the ladder device is rotatably connected to the fire truck.

Images