JP2001200683A - Foot base for stepladder and ladder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that the foot bar of a stepladder and a ladder is thin, unstable, and dangerous as the tread for the work at a high place by utilizing the foot bar. SOLUTION: This device is firmly assembled to the stepladder and the ladder in a three-point support state to provide a horizontal and wide tread.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a step ladder mounted on a stepladder and a ladder.

[0002]

2. Description of the Related Art Conventional stepladders and ladders are thin.

[0003]

However, conventional stepladders and ladders have a problem in that when they stand and work on them, the stepladder and the ladder are unstable, and the feet are easily fatigued, which is dangerous.

According to the present invention, a step ladder provided with three fitting portions is fitted to and attached to two successive steps of a stepladder and a ladder, and a step pedestal having a horizontal and stable stepping plate is provided. It is intended to provide.

[0005]

In order to achieve the above-mentioned object, a footrest according to the present invention is characterized in that the footrest is kept stable by fitting three projections and recesses, and the projection side has a convex side. The concave side is a U-shaped space provided on the back surface of one inclined plate.

The above-mentioned U-shaped space portion is provided at two positions where it is assembled to the upper step and the lower step, and is dimensioned to fit exactly on three surfaces of the step.

[0007] The U-shaped space formed in the upper stage is formed of three parts: a foot plate, an inclined plate, and an upper support plate.
The U-shaped space formed in the lower part is formed by three parts: an inclined plate, a horizontal plate for lower stepping, and a lower support plate.

The load applied to the foot plate is mainly received by the upper step of the continuous upper and lower steps of the stepladder and the ladder, and the load applied to the front end of the foot plate is the front part. The load transmitted to the inclined plate from the support plate and supporting a part of it is further applied to the rear end of the foot plate, and the end faces of the two upper support plates fixed to the foot plate are subjected to the upper stepping force. A part of the lifting surface is supported against the rear side surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows a state in which the step stool of the present invention is assembled to a stepladder in use. (A) The stepping plate 1 is a two-step continuous stepping ladder and ladder. Place the foot plate horizontally on the tread surface of the upper step. (B) The inclined plate 2 is brought into contact with two successive upper and lower elevation surfaces to maintain the inclination angle of the stepping surface of the stepladder and to maintain the inclination angle of the step surface.
Secure to the back of. The front end 7 of the footplate 1 is located on the inner side closer to the center of gravity of the stepladder than the grounding point of the pillar of the stepladder.

The trapezoidal front support plate 3 shown in FIG. 2 has one side of two adjacent sides abutting on the back surface in the direction of the front end of the foot plate and the other side on the surface of the inclined plate 2. In order to fill the space created by the foot plate 1 and the inclined plate 2, a total of two sheets are fixed to the left and right symmetrical positions of the front end 7 of the foot plate.

As shown in FIG. 3, two upper support plates 4 are fixed to the left and right side surfaces of the foot plate 1, respectively, two in total. Note that the end surface of the upper support plate 4 is applied to the rear side surface of the elevating surface of the upper step.

FIG. 3 shows that the foot plate 1, the inclined plate 2, and the upper support plate 4 form a U-shaped upper space portion 10. In addition, two upper support plates 4
The U-shaped space corresponding to the upper step corresponds to two of the three points supported by three points. Further, when the stepladder according to the present invention is folded while the stepladder is attached to the stepladder, the lower part of the upper support plate 4 is cut diagonally so as not to hit the opponent's stepping.

In the embodiment shown in FIG. 4, (a) a horizontal tread plate 5 is placed on the tread surface of the lower tread, and its left and right sides are fixed to the back surface of the inclined plate 2 and the lower support plate 6, respectively. I do. (B) In this case, the lower support plate 6 is kept parallel to the inclined plate 2 and is applied to the rear side surface of the lower stepping step. Here, a U-shaped space portion 11 is formed.

The U-shaped lower space portion 11 shown in FIG. 4 is a three-point support at one location, and the U-shaped upper space portion 10 at the three locations is three in total. As a result, three U-shaped spaces are formed on one inclined plate 2, and three-point support is completed.

The cut portion 9 shown in FIG. 4 cuts the skirts on both sides of the inclined plate 2 into a symmetrically gentle curved shape.

In the embodiment shown in FIG. 5, a ladder is provided with the footrest according to the present invention.

[0017]

Since the present invention has been made as described above, it has the following effects.

The above-mentioned three U-shaped spaces are firmly fitted into the upper and lower two-step treads with continuous stepladder, so that the stepping board of the present invention can maintain a stable state together with the stepladder, Therefore, a stable and wide foot plate is provided, and various operations using the foot plate as a scaffold can be performed safely and reliably.

Since the footrest of the present invention is formed by a three-point support fitting mechanism, it can be easily mounted and removed. In addition, since the stepladder of the present invention can be folded and stored with the stepladder attached to the stepladder, in this case, mounting and detaching steps can be omitted.

By cutting the hem on both sides of the inclined plate 2, a sufficient dimension is secured on the tread surface of the stepping plate so that an operator's foot can easily step on it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a relational position between a stepladder and a stepper when the stepper according to the present invention is incorporated into the stepladder.

FIG. 2 is a perspective view of a footstep.

FIG. 3 is a perspective view showing an embodiment in which an upper support plate is fixed to left and right side surfaces of a rear end portion of a footrest;

FIG. 4 is a perspective view of the embodiment showing how to fix a lower stepping horizontal plate and a lower support plate to the back of the inclined plate.

FIG. 5 is a perspective view when the step ladder of the present invention is assembled to a ladder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foot plate 2 Inclined plate 3 Front support plate 4 Upper support plate 5 Lower plate for horizontal treading 6 Lower support plate 7 Front end of foot plate 8 Rear end of foot plate 9 Cut part (bottom side of inclined plate) 10 U-shaped upper space part 11 U-shaped lower space part

Claims (2)

[Claims] (1) The step board (1) is placed on a tread surface of an upper step of a continuous stepping step of a stepladder and a ladder and takes a horizontal position. (2) The inclined plate (2) is fixed to the back surface of the foot plate (1) in a state where the inclined plate (2) is inclined against the up and down surfaces of two successive steps of the stepladder and the ladder. (3) Two upper support plates (4) are fixed to each of the left and right side surfaces of the rear end (8) of the foot plate (1). (4) The trapezoidal front support plate (3) is configured such that two adjacent sides of the four sides are brought into contact with the back surface of the foot plate (1) and the surface of the inclined plate (2), respectively. A total of two sheets are fixed to the left and right symmetric positions of the front end (7). (5) The horizontal plate for lower treading (5) is placed on the tread surface of the lower tread, and its left and right sides are fixed to the back surface of the inclined plate (2) and the lower support plate (6). A step platform having the above configuration. 2. A footrest according to claim 1, wherein the skirts on both sides of the inclined plate are cut into a gentle curve.