JPH08199955A - Leg of stepladder - Google Patents

Abstract

PURPOSE: To execute a work rapidly and achieve safety by making one and two legs of a stepladder slightly shorter than the remainder thereof and a short leg is telescopically mounted to each end of the legs to adjust the length of the legs corresponding to the irregularity of an installation area of the stepladder. CONSTITUTION: Length of one leg and two legs of legs 1 constituting a stepladder having various steps such as three legs, four legs, is made shorter than that of the other legs and a short leg 3 is slidably mounted to each end of the shorter legs so as to be extended. The length of the short leg 3 can be optionally adjusted by loosening a bolt 5 with a grip handle. When an installation area for the stepladder is inclined or has irregularity, the length of the leg 3 is adjusted to set the stepladder in a well-balanced state. As a result, the stepladder can be installed rapidly and safely even in an unstable area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various types of stepladder legs formed of metal.

[0002]

2. Description of the Related Art In various conventional stepladders made of metal, the four legs of the stepladder have the same fixed length.

[0003]

In various conventional stepladders formed of metal, since the four legs have a fixed length, the stepladder can be stably installed in an uneven place. Therefore, it is necessary to take various measures to stably install the stepladder.

[0004]

[Means for Solving the Problems] The length of one or two legs of a stepladder made of metal is formed to be about 70 mm shorter than the other legs and 20 mm or 90 mm from the tip thereof. A bolt hole is formed at the position of ▼, and the telescopic short leg (3) shown in FIGS. 2 and 3 is attached by the grip handle bolt (5).

[0005]

In the stepladder formed as described above, even if the grounding surface on which the stepladder is to be installed has some irregularities, the bolt (5) with the grip handle is loosened and the short leg (3) is opened (8). Since it can be slidably adjusted along the length of the stepladder, by changing the length of the stepladder with the short leg (3) attached, the stepladder can be easily and stably installed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given with reference to the drawings. A stepladder leg (1) is constructed by using aluminum steel material having the shape shown in FIGS. 2 and 3, and one leg (1) is formed to be about 70 mm shorter than the other leg and 20 mm from its tip. And form a round hole of 9 to 11 mm at the position of 90 mm, and the short leg (3) closely adheres to the steel material shape of the step leg (1) as shown in FIGS. 2 and 3. Using an aluminum steel material with a shape like this and the opening width of the opening (8) is about 10 to 12 mm, it is cut into a length of about 220 mm and the meclaput (7) is welded and tacked at one end thereof. The width of the washer (4) that fits inside the leg (3) is 4 to 5 mm thick and the length is about 100 mm, and M8 is located 35 mm to the left and right from the center. Prevent slippage after inserting this washer (4) forming the female thread (mm) into the short leg (3) Beam forming the mounting short leg (3) and (6), thus forming the short legs (3) M8 ▲ millimeter ▼ grip handle bolt (5) forms a hole in the leg (1)
As shown in FIGS. 2 and 3, the washer (4) is used to form the entire stepladder, and when the two legs are made to extend and retract, they are formed as described above. Except for the part where the short leg (3) is attached, the rest of the step is molded in the same manner as in the past. Depending on the size and height of the stepladder, the size and height of the stepladder's leg (1) are cut short and the angle of the cut is , Short leg (3) length, angle of both cuts, washer (4)
There is no limitation on the size and the like.

[0007]

EFFECTS OF THE INVENTION One or two of the stepladder's legs (1) are formed to be somewhat shorter than the other legs, and the short legs (3) that can be freely extended and retracted are attached to the tips of these legs to adjust the short legs (3). Thus, the overall length of the stepladder (1) can be easily changed, so that when the stepladder is installed in an uneven installation place, it can be installed quickly and in a well-balanced manner, and the work can be performed quickly.

[Brief description of drawings]

[One figure] Front view

[Fig. 2] Front sectional view of the short leg mounting part

[Fig. 3] Side sectional view of the short leg mounting part

[Explanation of symbols]

1 ... leg 2 ... step 3 ... short leg
4 ... Washer with female thread 5 ... Bolt with grip handle 6 ... Skid rubber 7 ... Plate 8 ... Opening 9 ... Round hole

Claims (1)

[Claims] 1. The lengths of one and two legs of a stepladder of various shapes formed of metal are formed to be slightly shorter than those of the other legs,
A stepladder characterized by attaching a retractable short leg to its tip and adjusting the retractable short leg to easily change the leg length.