CN2131966Y

CN2131966Y - Folding portable ladder

Info

Publication number: CN2131966Y
Application number: CN 91209483
Authority: CN
Inventors: 高伟志; 唐张娥
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-03
Filing date: 1991-06-03
Publication date: 1993-05-05
Anticipated expiration: 2001-06-03

Abstract

The utility model relates to a folding portable climbing ladder, which comprises an upper ladder body, a middle ladder body, a lower ladder body, a movable clamping rack, a connecting rod and a spring clamp. The spring clamp can automatically clamp the ladder bodies to provide a wider lap supporting width when a folding portable ladder is stretched in an appropriate position. A rafter foot is folded to paralleled and overlapped to the ladder bodies so as to form a small volume when the folding portable ladder is folded. The utility model is also stretched to have the use function of a single side climbing ladder.

Description

Folding portable ladder

The utility model relates to the canopy ladder that a kind of ascend operation uses, and is characterized in and can folds easily, stretches.

Although the canopy ladder that has various material and structure to have nothing in common with each other at present, a kind of to possess when folding volume simultaneously very little, easy to carry but do not have as yet, stretches back bottom broad, rational in infrastructure, stretch canopy ladder flexibly, traditional processing method is that supporting leg is made the fixed structure with certain outer subtended angle, like this, after the canopy ladder draws in, the wide bottom exists, and can not have smaller volume, gives to carry and makes troubles.

The design has the bottom of broad when a kind of the rising is provided, and draws back feet and the parallel coincidence of terraced body in, only need general section bar to make, and can be drawn into the single face ladder use of ascending a height simultaneously, folding-type portable canopy ladder easy to carry.

Fig. 1 is the structure chart of canopy ladder.

Fig. 2 is the active card frame, the chucking schematic diagram.

Fig. 3 is Spring Card locking schematic diagram.

Fig. 4 is for being drawn into single face when ladder locking schematic diagram.

The present invention is achieved in that with reference to Fig. 1 the terraced body of canopy ladder forms by three sections, and terraced top board (2) is being welded on the top of upper terraced stature (1), and the terraced both sides of canopy ladder top board adopts hinges (3) to connect, and can do around hinge＞90 degree rotations. The middle part outside is installed with half connecting rod (19) through bearing pin, and its tensile elongation is determining vertical subtended angle of canopy ladder, and with the top board hinge, the triangular structure that upper terraced stature upper end consists of plays and stablizes the canopy ladder and act on longitudinally. The bottom is connected with middle terraced stature (8), connect with hinge (4) at the supporting end face, the one side corresponding with supported end, at upper terraced stature hold-open catch (5) is installed, in Spring Card (6) is installed on the terraced stature, after ladder drew heavily fortified point, Spring Card was stuck on the hold-open catch, thereby with upper terraced stature locking. When folding, press the lower end of dop (7), dop is opened outward, and is namely collapsible.

In the upper end of terraced stature (8) link to each other with descending stair stature (10) through active card frame (9) again.Its lower end links to each other with connecting rod (12) through pivot pin (11), and the other end of connecting rod links to each other with the appropriate location of descending stair stature through pivot pin (13).Like this by active card, connecting rod, in, the descending stair stature forms a linkage.When the active card frame is stretched to the permanent position, on the hold-open catch during the Spring Card on the active card frame is stuck in and is installed on the terraced stature.This moment is with middle terraced stature, connecting rod, and the descending stair stature constitutes a triangular structure, and the descending stair stature is opened the bottom fulcrum that forms broad outward, has increased the stability of canopy ladder when raising.And moving down of active card frame increased the height of canopy ladder simultaneously.Regulate the position of hold-open catch or the length of change connecting rod, can obtain different canopy ladder bottom subtended angles.When folding, only need push the dop lower end, dop is opened outward, and is promptly collapsible.The outside of terraced stature during descending stair stature after the gathering is stacked in abreast.

The pin of canopy ladder (14) is made with insulation materials, is fixed on descending stair stature lower end with the Luo silk.

By torsion spring (15) and dop (7), pivot pin sieve silk (16) is formed with reference to the Spring Card (6) of Fig. 3, folding-type portable canopy ladder.Pivot pin Luo silk passes torsion spring center and dop pin shaft hole, on terraced stature in being fixed on (with active card frame front) the Luo silk hole.One end of torsion spring is pressed on the dop, and the other end is fixed on one's body the ladder.When the stretching of canopy ladder was about to put in place, the lower end of hold-open catch (upper end) compressing dop was opened outward.When putting in place, under the effect of torsion spring, dop resets and hooks hold-open catch, forms locking.

With reference to Fig. 2, active card frame (9) is made up of metallic support (17) and Spring Card, and an end of metallic support is being fixed Active foot plate with the Luo silk, and the other end is being fixed the descending stair stature through pivot pin, the front of support is installed with Spring Card with pivot pin Luo silk, during whole active card frame is sleeved on the terraced stature.

With reference to Fig. 4.When the canopy ladder was drawn into the use of single face ladder, whole ladder highly doubled.During stretching, the canopy ladder is around terraced top board hinge through＞90 degree, and to tighten in the opening holddown groove that goat's horn sieve bolt (18) on the 1/2 terraced top board outside snaps in the 1/2 top board outside in addition be lockable as long as will be installed in.

Folding-type portable canopy ladder manufacture material, can select common light-weight metal section bar or thin-walled steel section bar for use, terraced pedal can weld, also available fixedly card is installed on the terraced stature.Its surfacing can adopt electrification to handle, but the also plastic-blasting or the processing of spraying paint.

As an alternative, select the terraced stature of different length for use, or between last descending stair stature, increase by one to several grades terraced statures in centre, the change connecting rod, it is serial with the canopy ladder that the bottom has nothing in common with each other to form height.

Claims

1, a kind of folding-type portable canopy ladder is characterized in that having terraced body, Spring Card (6), active card frame (9), connecting rod (12) is formed, and when the canopy ladder is stretched to the operating position, the Spring Card that is installed on terraced body and the active card frame is stuck on the hold-open catch (5) automatically, with the canopy ladder at this locking position.

2, as claims 1 described folding-type portable canopy ladder, it is characterized in that terraced body is by last terraced stature (1), in terraced stature (8), descending stair stature (10) is formed, and go up terraced stature upper end and welding terraced top board (2), link to each other with hinge (3) in the middle of the ladder top board of two sides, ladder top board two outsides are installed with locking goat's horn Luo bolt (18) and opening holddown groove respectively, go up terraced stature middle-end and half connecting rod (19) is installed through pivot pin, the bottom connects with hinge (4) with the end face that is connected of middle terraced stature, the opposite that connects end face, hold-open catch (5) is installed on last terraced stature, in Spring Card (6) is installed on the terraced stature, in the upper end of terraced stature also link to each other with the descending stair stature through active card frame (9), the active card frame can move up and down on middle terraced stature, the lower end links to each other with connecting rod (12) through pivot pin (11), the other end of connecting rod links to each other with the suitable position of descending stair stature through pivot pin (13), and foot of ladder (14) is being fixed with the Luo silk in the bottom of descending stair stature.

3, as claims 1 described folding-type portable canopy ladder, it is characterized in that Spring Card (6) is by dop (7), torsion spring (15), form with pivot pin Luo silk (16), pivot pin Luo silk passes torsion spring center and dop axis hole, and on the Luo silk hole of terraced stature in being fixed on (with active card frame front), an end of torsion spring links to each other with dop, on the terraced stature, dop can rotate around pivot pin Luo silk during the other end was fixed on.

4, as claims 1 or 3 described folding-type portable canopy ladders, it is characterized in that active card frame (9) is made up of metallic support (17) and Spring Card (6), and an end of metallic support is being fixed Active foot plate, the other end is being fixed the upper end of descending stair stature through pivot pin, the front of support is installed with Spring Card with pivot pin sieve silk, during whole active card frame is sleeved on the terraced stature.