A fire truck rear ladder

Abstract

The present invention relates to the technical field of fire trucks, and in particular to a rear ladder of a fire truck. It includes a fixed ladder, a rotating ladder, a guide rail assembly and a telescopic rod; the guide rail assembly is fixed to the back of the fire truck body, one end of the telescopic rod is fixed to the fixed ladder, the other end of the telescopic rod is slidably connected to the guide rail assembly, and the rotating ladder is hinged at the bottom of the fixed ladder; the rotating ladder flips upward and is stored in the fixed ladder, the fixed ladder slides together with the telescopic rod into the guide rail assembly to realize the overall storage of the rear ladder, the fixed ladder slides together with the telescopic rod to the outside of the fire truck body, and the rotating ladder flips downward to realize the rear ladder propping up. It can be stored when not in use, which does not affect the normal use and travel of the fire truck. It is firmly fixed and easy to climb when in use, which provides a guarantee for firefighters to conveniently, quickly and safely climb onto the roof to operate the fire cannon and access the roof equipment.

Description

Technical Field

[0001] The invention relates to the technical field of fire trucks, in particular to a rear ladder of a fire truck. Background Art

[0002] Fire trucks, also known as fire trucks, are vehicles designed and manufactured to be suitable for firefighters to ride, equipped with various firefighting equipment or fire extinguishing agents, and used by firefighting forces for firefighting, auxiliary firefighting or fire rescue. Fire departments in most countries, including China, will also use them for other emergency rescue purposes. Fire trucks can transport firefighters to the disaster site and provide them with a variety of tools to perform disaster relief tasks. Modern fire trucks are usually equipped with steel ladders, water guns, portable fire extinguishers, self-contained breathing apparatus, protective clothing, demolition tools, first aid tools and other equipment. Some of them will also carry large firefighting equipment such as water tanks, water pumps, and foam fire extinguishing devices.

[0003] During the firefighting process, firefighters often need to climb onto the roof of a fire truck to operate a fire cannon or access equipment on the roof. Existing rear ladders of fire trucks are mostly fixed at the rear of the fire truck, and the lowest step is high from the ground, making it inconvenient to directly step onto the rear ladder. If the rear ladder is installed too low, it will affect the use and passage of the fire truck. Some rear ladders of fire trucks are folded and fixed to the rear of the fire truck and locked with fixed buckles. This type of rear ladder is prone to shaking when opened and closed, and the installation is not firm enough, and the safety of use is not good enough. In addition, there are multiple functional areas in the rear compartment of the fire truck, and the setting of the rear ladder will affect the normal use of these functional areas. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a rear ladder for a fire truck, which can be stored when not in use without affecting the normal use and driving of the fire truck, and is firmly fixed and easy to climb when in use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fire truck rear ladder comprises a fixed ladder, a rotating ladder, a guide rail assembly and a telescopic rod; the guide rail assembly is fixed to the rear of the fire truck body, one end of the telescopic rod is fixed to the fixed ladder, the other end of the telescopic rod is slidably connected to the guide rail assembly, and the rotating ladder is hinged at the bottom of the fixed ladder; the rotating ladder is flipped upward and stored in the fixed ladder, the fixed ladder slides together with the telescopic rod into the guide rail assembly to realize the overall storage of the rear ladder, the fixed ladder slides together with the telescopic rod to the outside of the fire truck body, and the rotating ladder flips downward to realize the rear ladder is propped up.

[0007] The guide rail assembly includes a housing, a pressure wheel and a knob-type fixing pin, wherein the pressure wheel is mounted on the housing; the telescopic rod is mounted between the upper and lower pressure wheels, and the telescopic rod slides along the pressure wheel and is fixed by the knob-type fixing pin after sliding.

[0008] The ladder also includes a cover plate, a pedal, an upper handrail and a side handrail. The cover plate is fixed on the side of the fixed ladder, the side handrail is fixed on the cover plate, the pedal is fixed on the top of the fixed ladder, and the upper handrail is fixed on the pedal.

[0009] The cross section of the telescopic rod is rhombus-shaped.

[0010] It also includes a first limit block and a second limit block that are adapted to each other. The first limit block is provided with a notch with an inclination, the first limit block is fixed on the fixed ladder, the second limit block is provided with a protrusion adapted to the notch, and the second limit block is fixed on the rotating ladder. After the rotating ladder is opened downward, the notch clamps the protrusion so that the rotating ladder is in an inclined state after opening downward.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The rotating ladder flips upward and is located inside the fixed ladder. The fixed ladder together with the telescopic rod slides into the guide rail assembly to realize the storage of the rear ladder. The rear ladder is completely stored in the guide rail assembly and will not affect the normal use of the functional area of ​​the rear compartment.

[0013] 2. The fixed ladder together with the telescopic rod slides to the outside of the rear body of the fire truck, and the rotating ladder flips down to support the rear ladder, which is stable and does not shake. Moreover, the rear ladder is located outside the rear body of the fire truck, and it will not affect the normal use of the rear compartment functional area even when working.

[0014] 3. The present invention is also provided with pedals, upper handrails and side handrails, which are easy to climb, so that firefighters can easily, quickly and safely climb onto the roof.

[0015] 4. The first limit block and the second limit block make the rotary ladder tilted after opening, which is convenient for climbing.

[0016] 5. The telescopic rod is installed between the upper and lower pressure wheels. The side of the telescopic rod is diamond-shaped. The telescopic rod slides along the pressure wheel to ensure that the rear slide can be pulled out and retracted smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in all expenditure states;

[0018] Figure 2 This is a schematic front view of the structure of the present invention in a stored state;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixed ladder of the present invention in a pulled-out state;

[0020] Figure 4 It is a schematic front view of the structure of the present invention;

[0021] Figure 5yes Figure 4 A-direction sectional view;

[0022] Figure 6 yes Figure 4 B-direction cross-sectional view;

[0023] Figure 7 yes Figure 4 C-section view;

[0024] Figure 8 yes Figure 5 A magnified view of part I.

[0025] In the figure: 1-fixed ladder 2-rotating ladder 3-guide rail assembly 4-telescopic rod 5-sealing plate 6-pedal 7-upper handrail 8-side handrail 9-first limit block 10-second limit block 31-housing 32-pressing wheel 33-knob-type fixing pin 91-notch DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0027] Example:

[0028] like Figure 1-3 As shown, a rear ladder of a fire truck comprises a fixed ladder 1, a rotating ladder 2, two guide rail assemblies 3 and two telescopic rods 4.

[0029] Two guide rail assemblies 3 are parallel to each other and fixed up and down behind the fire truck box body. One end of a telescopic rod 4 is slidably connected with the guide rail assembly 3, and the other end of the telescopic rod 4 is fixed on a fixed ladder.

[0030] The guide rail assembly 3 includes a housing 31, a pressure wheel 32 and a knob-shaped fixing pin 33. Each guide rail assembly 3 is provided with four pressure wheels 32, which are mounted on the housing 31, and two pressure wheels 32 are arranged in pairs up and down. The cross section of the telescopic rod 4 is a rhombus, and the pressure wheel 32 is provided with a corresponding groove. One end of the telescopic rod 4 is mounted between the upper and lower pressure wheels 32, and the apex of the telescopic rod 4 is located in the groove of the pressure wheel 32. The telescopic rod 4 slides horizontally along the pressure wheel 32 and is fixed by the knob-shaped fixing pin 33 after sliding.

[0031] The revolving ladder 2 is hinged at the bottom of the fixed ladder 1. The present invention also includes a first limit block 9 and a second limit block 10 that are adapted to each other. The first limit block 9 and the second limit block 10 are made of elastic buffer material. The first limit block 9 is provided with a notch 91 with an inclination. The first limit block 9 is fixed on the fixed ladder 1. The second limit block 10 is provided with a protrusion adapted to the notch 91. The second limit block 10 is fixed on the revolving ladder 2. After the revolving ladder 2 is opened downward, the notch 91 clamps the protrusion so that the revolving ladder 2 is in an inclined state after opening downward.

[0032] The present invention further comprises a cover plate 5 , a pedal 6 , an upper handrail 7 and a side handrail 8 . The cover plate 5 is fixed to the side of the fixed ladder 1 , the side handrail 8 is fixed to the cover plate 5 , the pedal 6 is fixed to the top of the fixed ladder 1 , and the upper handrail 7 is fixed to the pedal 6 .

[0033] When the present invention is in the storage state, the rotating ladder 2 is flipped upward and stored in the fixed ladder 1, and the fixed ladder 1 together with the telescopic rod 4 slides into the shell 31 of the guide rail assembly 3 to realize the overall storage of the rear ladder. The rear ladder is completely stored in the guide rail assembly 3, which will not affect the normal use of the rear compartment functional area of ​​the fire truck and will not affect the driving of the fire truck.

[0034] When the present invention is in working state, the fixed ladder 1 together with the telescopic rod 4 slides to the outside of the fire truck body, and the rotating ladder 2 flips downward to realize the rear ladder support. The support is stable and does not shake. Moreover, the rear ladder is located outside the rear body of the fire truck, and will not affect the normal use of the rear compartment functional area even when working.

[0035] The present invention is also provided with a cover plate 5, a pedal 6, an upper handrail 7 and a side handrail 8, which are easy to climb, and are convenient for firefighters to climb onto the roof conveniently, quickly and safely. The cover plate 5 is fixed to the side of the fixed ladder 1, and the cover plate 5 is integrated with the side box of the fire truck, and the overall design is smooth, simple, beautiful and generous.

[0036] The first stopper 9 and the second stopper 10 make the rotary ladder 2 tilted after opening, which is convenient for climbing. The telescopic rod 4 is installed between the upper and lower pressing wheels 32, and the telescopic rod 4 slides along the pressing wheels 32, ensuring that the rear slide can be pulled out and retracted smoothly.

[0037] The invention is easy to climb, does not affect the use and passage of fire trucks, has a simple structure and low cost, is firmly and reliably installed, and is flexible and light, providing a guarantee for firefighters to conveniently, quickly and safely climb onto the roof to operate the fire monitor and take out equipment on the roof.

[0038] The above embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above embodiments are conventional methods unless otherwise specified.

Claims

1. A rear ladder for a fire truck, characterized in that: It includes a fixed ladder, a rotating ladder, a guide rail assembly and a telescopic rod; the guide rail assembly is fixed to the rear of the fire truck body, one end of the telescopic rod is fixed to the fixed ladder, the other end of the telescopic rod is slidably connected to the guide rail assembly, and the rotating ladder is hinged at the bottom of the fixed ladder; the rotating ladder is flipped upward and stored in the fixed ladder, the fixed ladder together with the telescopic rod slides into the guide rail assembly to realize the overall storage of the rear ladder, the fixed ladder together with the telescopic rod slides to the outside of the fire truck body, and the rotating ladder is flipped downward to realize the rear ladder propping up; The guide rail assembly includes a housing, a pressure wheel and a knob-shaped fixing pin, wherein the pressure wheel is mounted on the housing; the telescopic rod is mounted between the upper and lower pressure wheels, and the telescopic rod slides along the pressure wheel and is fixed by the knob-shaped fixing pin after sliding; It also includes a cover plate, a pedal, an upper handrail and a side handrail, wherein the cover plate is fixed to the side of the fixed ladder, the side handrail is fixed to the cover plate, the pedal is fixed to the top of the fixed ladder, and the upper handrail is fixed to the pedal; The cross section of the telescopic rod is rhombus-shaped.

2. A fire truck rear ladder according to claim 1, characterized in that: It also includes a first limit block and a second limit block that are adapted to each other. The first limit block is provided with a notch with an inclination, the first limit block is fixed on the fixed ladder, the second limit block is provided with a protrusion adapted to the notch, and the second limit block is fixed on the rotating ladder. After the rotating ladder is opened downward, the notch clamps the protrusion, so that the rotating ladder is in an inclined state after opening downward.

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