Side ladder, detection method for ladder frame alignment, and fire truck

Abstract

The embodiment of the invention provides a side ladder, a detection method for ladder frame alignment and a firefighting truck, and belongs to the technical field of firefighting. The side ladder comprises a multiple sections of ladder frames, wherein each section of the multi-section ladder frame comprises at least one ladder bar, and when more than one ladder bar is arranged, the distance between two adjacent ladder bars is a fixed value; a driving device and a transmission device, wherein the driving device and the transmission device are connected between two adjacent ladder frames and used for enabling the multiple sections of the ladder frames to perform telescopic motion; a distance detection device, wherein the distance detection device is used for detecting the telescopic distancebetween the two adjacent ladder frames. The telescopic distance between the two adjacent ladder frames determines whether the ladder frames are aligned or not, and the detection result of the distance detection device is irrelevant to the gap between the ladder frames, so that the reliability of the detection result can be effectively improved, and the probability of error results is reduced.

Description

technical field [0001] The invention relates to the technical field of fire protection, in particular to a side ladder, a detection method for ladder frame alignment and a fire truck. Background technique [0002] There will be side ladders on the fire truck for people to climb on, which will include multi-section ladder frames. Since the ladder frame is a welded truss structure, when the ladder frame is not in alignment, two adjacent ladder bars (the structure of the ladder bars is as follows image 3 (shown) is too short, and it is inconvenient for people to crawl on the ladder frame. Therefore, when the ladder frame expands and contracts, it is necessary to check whether the ladder rails are aligned. [0003] In the existing technology, such as figure 1 with figure 2 As shown, by installing a proximity switch 4 at the first section of the ladder frame 1, the distance between it and the step 3 of the second section of the ladder frame 2 is detected by the proximity swi...

AI Technical Summary

Problems solved by technology

However, the detection distance of the proximity switch 4 is generally about 10mm, and the detection range is relatively small.

Due to the deviation of the ladder frame in the process of processing, or the extended distance of the ladder frame is too long, the tail of the protruding ladder frame will be drooped under the action of gravity, which will cause the first section of ladder frame 1 and the second section of ladder frame 2. There are differences in the gaps between the ladder bars 3, so the detection results of this detection method are not accurate enough, and there are unreliable factors

For example, when the gap is too large, the proximity switch cannot detect the step of the second ladder frame, or if the gap is too small, the proximity switch will be damaged

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