CN2498922Y - Improvement of ladder stool structure - Google Patents

Abstract

The utility model discloses an improvement of ladder, which comprises front legs, rear legs and a petal, the utility model is characterized in hinges connected between the legs and the rear legs of ladder, the vertical distance between the center (datum B) of riveting hole connected fixedly at the connection hinges of front legs and the middle shaft line (datum A) of the front legs is not less than the sum of both the radius of front leg tube and the radius of rear leg tube. The structure of the utility model makes the front and rear legs of the ladder overlapped completely, so that a plurality of ladders can be completely combined for loading, thereby reducing loading volume and lowering transportation cost.

Description

A kind of improvement of step stool structure

Affiliated technical field: the utility model relates to a kind of improvement of step stool foldable structure.

Technical background: step stool combines the structure of folding seat, ladder, makes ladder stable as stool, realizes steadily climbing and safety, and the characteristics that have folding seat simultaneously again are collapsible, are great development of traditional ladder; And be the integrated of the world as big characteristics of modern economy, produce more and more concentrated, quality, cost are lowered to minimum, the intensification of producing has also brought improving constantly of freight, the storage of commodity, cost of transportation proportion are high, therefore, shared volume when how to dwindle transportation, reducing freight is again a new problem.

Summary of the invention: the purpose of this utility model be design a kind of when folding the step stool of volume minimum, it is superimposed that two legs can fit together fully.

Step stool of the present utility model comprises foreleg, back leg, pedal, be connected hinge between step stool foreleg and back leg, its vertical range that is fastenedly connected between the axis of the center of the rivet hole that is connected with back leg on the connection hinge of foreleg (benchmark B) and foreleg (benchmark A) is not less than front leg tube radius and back leg pipe radius sum.

Described step stool, its back leg links into an integrated entity by self-tapping screw and back leg plug, foreleg by rivet be connected hinge and link into an integrated entity, the foreleg plug be connected hinge and become a rotatable hinge by rivet, back leg becomes a rotatable hinge with brace by rivet, brace becomes a rotatable hinge with springboard by rivet, and pedal becomes a rotatable hinge with foreleg by rivet, constitutes a four-bar linkage structure.

Described step stool is that the multilayer pedal is arranged.

Said structure of the present utility model makes the front and back leg of step stool superimposed fully, many step stools can be closed loading fully like this, has dwindled the delivery volume greatly, has reduced cost of transportation.

Description of drawings: Fig. 1 (a, b) connects the hinge schematic diagram for the utility model step stool; Fig. 2 is the utility model step stool fold mechanism schematic diagram; Fig. 3 opens, turns up view for the embodiment step stool.

The specific embodiment: the utility model is described in further detail below in conjunction with accompanying drawing embodiment: as Fig. 2, the utility model step stool is made up of foreleg 1, back leg 2, pedal 3, foreleg 1 is connected by rivet 14 with pedal 3, connecting hinge 4 one ends is inserted in the foreleg 1, and be fixed on the foreleg by rivet 5,6, back leg 2 is connected with back leg plug 8 by self-tapping screw 9, connects hinge 4 and is connected with back leg plug 8 by rivet 7.In the position of setting up pedal, back leg 2 is connected with brace 12 by rivet 13, and brace 12 forms rotatable the connection by rivet 10 with pedal 3.In said structure, back leg plug 8 be connected hinge 4 by rivet 7 riveted joints one rotatable hinge, back leg 2 is riveted into a rotatable hinge with brace 12 by rivet 13, brace 12 is riveted into a rotatable hinge with pedal 3 by rivet 10, pedal 3 is riveted into a rotatable hinge with foreleg 1 by rivet 14, constitutes a four-bar linkage structure.

Also be provided with a salient point 11 on the duckboard stool, salient point 11 plays the position-limiting action of pedal when opening step stool.

Below foreleg 1, also be provided with a pedal 15.It is connected the foreleg lower end.

This structure of the present utility model can be set up the multilayer pedal according to the height of step stool, to satisfy the needs that various height are climbed.

Connect hinge as shown in Figure 1: it comprises sleeve pipe 4.1 that connects foreleg and the Y shape fork 4.2 that is connected the back leg plug.

Claims (3)

1, a kind of improvement of step stool structure, its step stool comprises foreleg, back leg, pedal, it is characterized in that the hinge that is connected between step stool foreleg and the back leg, its vertical range that is fastenedly connected between the axis of the center of the rivet hole that is connected with back leg on the connection hinge of foreleg (benchmark B) and foreleg (benchmark A) is not less than front leg tube radius and back leg pipe radius sum.

2, the improvement of a kind of step stool structure according to claim 1, it is characterized in that its back leg links into an integrated entity by self-tapping screw and back leg plug, foreleg by rivet be connected hinge and link into an integrated entity, the back leg plug be connected hinge and become a rotatable hinge by rivet, back leg becomes a rotatable hinge with brace by rivet, brace becomes a rotatable hinge with pedal by rivet, pedal becomes a rotatable hinge with foreleg by rivet, constitutes a four-bar linkage structure.

3, the improvement of a kind of step stool structure according to claim 1 is characterized in that step stool has the multilayer pedal.

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