Three-leg ladder

Abstract

The invention provides a three-leg ladder. The three-leg ladder is suitable for mounting and maintaining of aerial electric lamps of orchards and ordinary basketball courts. The three-leg ladder is characterized by comprising front ladder legs, ladder steps, a tie bar, hooks, a rear ladder leg, a large bolt, lower connecting steps, middle connecting steps, small bolts and ladder sleeves; and the front ladder legs are in inverted V shapes, the ladder steps with the lower portions longer than the upper portions are arranged between the two front ladder legs, the tie bar is fixed to the middles of the inner sides below half of the ladder steps, the hooks are arranged on the outer sides of the portions, above half of the ladder steps, of the two front ladder legs, the top end of the rear ladder leg is inserted into the portion between the top ends of the two front ladder legs, the top ends of the three legs intersect and are fixed together through the large bolt, the lengths of the three legs are equal, the distances between the ladder bottoms are equal, the two lower connecting steps are connected to the positions, as high as the first section of the ladder steps of the front ladder legs, of the outer sides of the front ladder legs and the rear ladder leg through the small bolts, the two middle connecting steps are connected to the outer sides of the middle sections of the front ladder legs and the rear ladder leg through small bolts, and the ladder sleeves sleeve the bottom ends of the three ladder legs.

Description

technical field [0001] The present invention relates to a ladder. Background technique [0002] Now, most of the fruit growers in the fruit tree circle are folding ladders with four legs. When using these four legs, they may not all be placed on the same soft and hard soil, nor may they all be placed on the same hard and flat surface. The ladder is on the ground, so the ladder is not stable. At this time, the person stepping on the ladder has to come down and readjust the position of the ladder. Still happens from time to time. Generally, the electric lights on the basketball court are on the wires between the two blues. If any light is off, it is easy to deal with in the city. There are lifts and ladders, and the problem can be solved in a short time, but in remote areas There are very few cars in mountainous areas. Besides, because changing a light bulb can’t afford a lift car, some lights go out as soon as they go out. Some people have to unplug the wires at one or both...

AI Technical Summary

Problems solved by technology

Generally, the electric lights on the basketball court are on the wires between the two blues. If any light is off, it is easy to deal with in the city. There are lifts and ladders, and the problem can be solved in a short time, but in remote areas There are very few cars in mountainous areas. Besides, because changing a light bulb can’t afford a lift car, some lights go out as soon as they go out. Some people have to unplug the wires at one or both ends just to change a light bulb. For a long time; there are also civilian low-altitude wires and telephone lines that have been hung up, and the electricians also spend a lot of time wiring because they do not have suitable ladders.

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