CN1189573A

CN1189573A - Folding ladder

Info

Publication number: CN1189573A
Application number: CN97108821A
Authority: CN
Inventors: 苏汝堂
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-28
Filing date: 1997-01-28
Publication date: 1998-08-05

Abstract

A foldable ladder is composed of longitudinal bars and transverse bars. Said longitudinal bar cosists of at least 4 segments. Adjacent segments are connected to each other through a movable connector which is circular plates rotary relatively. There are holes on the circular plates for locking the adjacent segments at several different angles. Its advantages include high safety application, high flexibility for different environments, and easy folding or unfolding.

Description

Folding ladder

The present invention relates to a kind of ladder, particularly a kind ofly can fold also openable ladder.

Early stage ladder generally all can not fold, thus the ladder that adopts in order to climb up higher place all than higher, the time spent is not occupied bigger space, so very inconvenient when depositing.

Patent Office of the People's Republic of China is ZL.89201920 in the patent No. of notice of authorization on the 10th in October nineteen ninety, name is called the utility model patent of " folded ladder ", disclosed a kind of not time spent stored collapsed, launch and just can reach the folding ladder of certain-length during use with the gripping mechanism chucking, this ladder is made up of a plurality of square shape frameworks, each framework links to each other with articulated mounting, and gripping mechanism and hole clipping are installed on each framework.But the conception of this ladder is not mature enough, lacks operability, and it does not provide rational articulated mounting, can not guarantee the intensity of hinge portion, simultaneously because each framework all has articulated mounting, launches all inconvenient during production and when using.

Patent Office of the People's Republic of China is ZL.93204673 in the patent No. of notice of authorization on the 12nd October in 1994, and name is called the utility model patent of " family expenses foldable ladder ", has also adopted the folding hinge means that can overturn, and has prevented locking with the night bolt of slide block.This folding ladder can only be launched into a kind of state of straight line.

The object of the present invention is to provide a kind of folding ladder very easily that folds and open all.This folding ladder coupling arrangement is reliable, and can be launched into tens kinds of shapes, even more kinds of shapes, to adapt to different working spaces.

For this reason, the present invention adopts following scheme: a kind of folding ladder, comprise vertical pole, cross bar etc., vertical pole is formed by four sections at least, putting connection by the activity tipping between every section forms, this coupling arrangement is made up of double-deck plate of two covers that is comma shape respectively, and two cover plates link to each other with two adjacent vertical poles respectively, and can relatively rotate around common axle; Have the hole that corresponds to each other in the two cover plates; Also be provided with a locking device that when two cover plates rotate to some position relatively, can insert in the hole and be used for fixing.

Design science of the present invention is reasonable, safe in utilization, can open like a cork and fold, because ladder constitutes by at least four sections, and adjacent two sections can lock on several positions, therefore ladder can be varied to a variety of shapes, to adapt to different working environments and job requirement, also can be when some shape working plate and using on the frame as workbench.And every cover plate all is double-deck, has also increased the intensity of coupling arrangement greatly.

Be further described below in conjunction with drawings and Examples.

Fig. 1 is the overall structure schematic diagram of folding ladder;

Fig. 2 is the hypomere structure chart of folding ladder;

Fig. 3 is the hookup folded state front view of folding ladder;

Fig. 4 is the front view of folding ladder connection sheet;

Fig. 5 is a folding ladder coupling arrangement left view, and wherein connection sheet partly is a sectional view;

Fig. 6 is a folding ladder coupling arrangement right view;

Fig. 7 is one of folding ladder coupling arrangement expanded position schematic diagram;

Fig. 8 is two of a folding ladder coupling arrangement expanded position schematic diagram;

Fig. 9 is three of a folding ladder coupling arrangement expanded position schematic diagram.

Embodiment: with reference to institute's drawings attached.

Folding ladder in the present embodiment, comprise vertical pole 3, cross bar 4 etc., vertical pole 3 is formed by four sections at least, puts connection by the activity tipping between every section and forms, this coupling arrangement is formed by plate 1 and plate 2 hinge knots, and plate 1 and plate 2 can be made relative rotary motion around common axle 5;

Have the hole that corresponds to each other in plate 1 and the plate 2; Also be provided with one and rotate to the locking device that a certain position can insert in the hole and be used for fixing around common axle is relative when plate 1 and plate 2.

The coupling arrangement of folding ladder, its plate is double-deck, and by closing-up.Plate 2 also is double-deck, by closing-up.Plate 1 and plate 2 all are comma shape, the afterbody of comma shape respectively with the vertical pole end concrete mutually that is connect separately, the circular portion of comma shape plate 1 is placed in the outside of the circular portion of plate 2.

Locking device adopts following structures: axle 5 passes the center of plate 1 and plate 2; The outer end of axle 5 is with button 6, inner center of inserting a rotating handles 7.

One deck of double-deck plate 1 has two circular holes symmetrically, and another layer also has two circular holes in same position, and the direction that circular hole is opened to plate 1 is extended to a long extending bore, and the radian of extending bore is that 5 degree are to 20 degree;

When rotating to certain position and the hole in the plate 1 is corresponding in that plate 1 and plate 2 are relative respectively for the inside and outside two-layer at least two pairs of holes that also have of plate 2, the every pair of hole;

Between button 6 and the plate 1 spring 9 is arranged, an end of spring 9 withstands button 6, and opens direction by plate 1 and give axle 5 with turning moment, and the other end passes plate 1 and plate 2 and fixing;

An inserting handle 8 respectively is equipped with at the two ends of rotating handles 7, and the other end of inserting handle 8 inserts in the hole that aligns mutually.

When this locking device is locked, corresponding each hole aligns in plate 1 and the plate 2, and inserting handle 8 inserts in the hole, in the time of need folding or open, press push button 6, because the effect of spring 9, axle rotates an angle automatically along opening direction in extending bore, rotate plate 1 and plate 2 along opening direction, after forwarding certain angle to, extending bore end in the plate 1 promotes inserting handle 8 again and rotates together, and it is inserted in the hole that aligns again, and then folding ladder is automatically locked in this angle again.

Have between the plate 2 of described bilayer and make the boss that keeps certain distance between two-layer.

The cross section of described vertical pole 3 is " E " font, and the cross section of this E type both can be saved material, alleviates the weight of folding ladder, can guarantee that again ladder has enough intensity upon deployment.

The cross bar 4 that is provided with between the vertical pole 3 of folding ladder both sides is hollow, and has the anti-skidding line that draws.

One end of folding ladder also has an auxiliary pin, can increase the stability of ladder when ladder launches fully.

The movable coupling arrangement of this folding ladder can also have a removable protective sleeve, falls into the link joint device to prevent silt.In addition, when opening the angle that is different owing to folding ladder, the strong point absolute altitude difference on ground, this protective sleeve can also play the effect of regulating the strong point, so that ladder is stressed evenly, prolongs its life-span.

Claims

1. a folding ladder comprises vertical pole (3), cross bar (4) etc., and vertical pole (3) is formed by four sections at least, puts connection by the activity tipping between every section and forms, and it is characterized in that:

Described coupling arrangement is made up of plate that is comma shape respectively (1) and plate (2), and plate (1) links to each other with two vertical poles respectively with plate (2), and can relatively rotate around common axle (5);

Have the hole that corresponds to each other in described plate (1) and the plate (2); Also be provided with a locking device that can insert in the hole and be used for fixing when rotating to some position when plate (1) is relative with plate (2).

2. folding ladder as claimed in claim 1, it is characterized in that: all to be all be double-deck for plate (1) by closing-up and plate (2) respectively, the circular portion of plate (1) is placed in the circular portion outside of plate (2), and connects by axle (5).

3. folding ladder as claimed in claim 1 or 2 is characterized in that locking device adopts following structures:

Described axle (5) passes the center of plate (1) and plate (2); The outer end of axle (5) is with button (6), inner center of inserting a rotating handles (7);

One deck of double-deck plate (1) has two circular holes symmetrically on a diameter, another layer also has two circular holes and be extended to a long extending bore to the direction that connection sheet (1) is opened in same position, and the radian of extending bore is that 5 degree are to 20 degree;

When rotating to certain position and the hole in the plate (1) is corresponding in that plate (1) is relative with plate (2) respectively for the inside and outside two-layer at least two pairs of holes that also have of plate (2), the every pair of hole;

Between button (6) and the plate (1) spring is arranged, an end of spring withstands button (6), and opens direction by plate (1) and give axle (5) with turning moment, and the other end passes plate (1) and plate (2) and fixing;

An inserting handle (8) respectively is equipped with at the two ends of rotating handles (7), and the other end of inserting handle (8) inserts in the hole that aligns mutually.

4. folding ladder as claimed in claim 3 is characterized in that: have between the plate of described bilayer (2) to make the boss that keeps certain distance between two-layer.

5. folding ladder as claimed in claim 1 is characterized in that: described cross bar (4) has the anti-skidding line that draws.

6. folding ladder as claimed in claim 1 is characterized in that: described movable coupling arrangement has a removable protective sleeve.

7. folding ladder as claimed in claim 1 is characterized in that: the cross section of described vertical pole (3) is " E " font.