CN201110121Y

CN201110121Y - Rapid telescopic ladder

Info

Publication number: CN201110121Y
Application number: CNU2007200293794U
Authority: CN
Inventors: 王相武
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2008-09-03
Anticipated expiration: 2017-10-19

Abstract

The utility model discloses a quick extension ladder, which comprises a plurality of shearing arms, and the shearing arms form a plurality of shearing forks through hinging with each other in center, two ends of two shearing arms of each shearing fork are respectively hinged with two shearing arms of adjacent forks to form a shearing fork-type telescopic ladder frame, the top end of the ladder frame is provided with a hook, and the lower end is provided with a driving device which can drive the ladder frame to come and go, all shearing forks are respectively provided with waling stripes for stepping. The extension ladder of the utility model can be convenient to open, which can adapt to working environments with various height scopes.

Description

The quick-expansion ladder

Technical field

The utility model relates to a kind of ladder, especially relates to the quick-expansion ladder that adopts the scissor structure ladder.

Background technology

Extension ladder uses flexibly and is applied to various operating environments by people owing to its convenient transportation.The extension ladder of people's use at present adopts the more piece bench extension ladder of drawing and pulling type mutually more, but this extension ladder needs single-unit that each bench is opened one by one when use is opened, inconvenience very, and the use adjusting highly for extension ladder also exists certain limitation, can only be used in each bench integral multiple height, as highly not being inconsistent, then can only regulate the gradient of ladder, influenced the job area of extension ladder.

Summary of the invention

Technical problem to be solved in the utility model has provided a kind of opening conveniently, can adapt to the quick-expansion ladder of various altitude ranges.

For solving the problems of the technologies described above, the technical solution of the utility model is: the quick-expansion ladder, comprise some arms of cutting, cut arm by the some forks of cutting of the hinged in twos formation in centre, respectively cut the two ends that fork two cuts arm and cut the hinged in twos formation scissor type telescopic of arm ladder with the adjacent fork two of cutting successively respectively, described ladder top is provided with hook and the lower end is provided with and can drives the flexible drive unit of ladder; The described fork of respectively cutting is respectively equipped with the stull that can Gong trample.

As a kind of improvement, described stull is provided with guide groove, and described formation cuts that one of fork is cut arm and stull one end is hinged, and another is cut arm and is provided with guide shaft, and described guide shaft passes guide groove and can slide in guide groove.

As further improvement, described stull is located at and is respectively cut the top that fork two is cut the middle hinged place of arm.

As further improvement, described drive unit comprises drive stay, pull bar one end and adjacent two is cut two of fork, and to cut arm coaxial hinged, in addition end is respectively equipped with tooth bar and positioning tooth, and described adjacent two cut fork two cuts the arm hinged place and be respectively equipped with tooth bar meshed gears and the location that cooperates with positioning tooth and refer in addition.

As further improvement, described drive unit comprises drive stay, and pull bar one end and adjacent two is cut two of fork, and to cut arm coaxial hinged, and end is provided with leading screw and passes described adjacent two and cut fork and two cut the back-up ring that the arm hinged place is provided with and cooperate with nut in addition in addition.

The quick-expansion ladder of technique scheme, owing to adopt some arms of cutting, cut arm by the some forks of cutting of the hinged in twos formation in centre, respectively cut respectively hinged in twos mutually successively formation scissor type telescopic ladder of two ends that fork two cuts arm, described ladder top is provided with hook and the lower end is provided with and can drives the flexible drive unit of ladder; The described fork of respectively cutting is respectively equipped with the stull that can Gong trample, so in use, just can drive the flexible of scissor type telescopic ladder by drive unit, extension ladder is opened, by the hook that the top is provided with extension ladder is fixed, and realized climbing ladder by stull, and can be by the control of drive unit to the scissor type telescopic ladder, realization has enlarged the compliance of extension ladder to operating environment to the adjustment of extension ladder arbitrary height.Stull is adopted with to cut arm hinged and be provided with and cut the mode of the guide shaft respective guide slots that arm is provided with, easy for installation, uses reliable.Drive unit adopts wheel and rack and positioning tooth and locating slot, and the mode that adopts bolt and nut to cooperate with back-up ring, and is simple in structure, the operation light and flexible.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is further described.

Accompanying drawing is the structural representation of the utility model quick-expansion ladder.

The specific embodiment

As shown in drawings, the quick-expansion ladder, comprise some arms 1 of cutting, cut arm 1 by the some forks of cutting of the hinged in twos formation in middle part, cut the hinged in twos mutually formation scissor type telescopic ladder in two ends that fork two is cut arm with adjacent successively respectively and respectively cut two ends that fork two cuts arm, be provided with hook 5 on the ladder top and be provided with in the lower end and can drive the flexible drive unit of ladder, be respectively equipped with the stull 2 that Gong to trample respectively cutting to stick, make extension ladder open or pack up by drive unit like this, by the climbing of stull realization to ladder, and stull 2 is provided with guide groove 21, and cutting one of fork in formation, to cut an end of arm and stull 2 hinged, and another is cut and then is provided with guide shaft 11 on the arm, guide shaft 11 passes guide groove 12 and can slide in guide groove 12, when extension ladder was opened or packed up, guide shaft just can slide in guide groove like this, was convenient to the flexible of ladder.And stull 2 can be located at and respectively cut the top that fork two is cut the middle hinged place of arm, make that like this climbing foot of ladder steps on the space increasing, has strengthened security performance.Drive unit can comprise drive stay 3, one end of pull bar 3 and adjacent two is cut two of fork, and to cut arm coaxial hinged, and end is respectively equipped with tooth bar 32 and positioning tooth 31 in addition, and adjacent two cut fork in addition two cuts the arm hinged place and is respectively equipped with tooth bar 32 meshed gears 42 and the location that cooperates with positioning tooth 31 and refers to 41, as shown in drawings, gear 42 and location can be referred to that 41 are arranged on two bearings of cutting on the ladder of arm hinged place 4, transmitting gear like this, thereby the tooth bar effect pulling pull bar pulling by gears engaged is cut arm to intermediary movements, realize the rising of opening of extension ladder, and by the location refer to 41 with positioning tooth 31 between cooperate, extension ladder is positioned suitable height; Certainly, drive unit also can adopt pull bar 3 one ends and adjacent two to cut two of fork, and to cut arm coaxial hinged, and be provided with leading screw at other end, and leading screw partly passes adjacent two and cuts fork and in addition two cut back-up ring that the arm hinged place is provided with and cooperate with nut, realizes adjustment to the extension ladder height by the cooperation position between adjusting nut and the leading screw like this.

Claims

1, quick-expansion ladder, comprise some arms (1) of cutting, cut arm (1) by the some forks of cutting of the hinged in twos formation in centre, respectively cut the two ends that fork two cuts arm and cut the hinged in twos formation scissor type telescopic of arm ladder with the adjacent fork two of cutting successively respectively, it is characterized in that: described ladder top is provided with hook (5) and the lower end is provided with and can drives the drive unit that ladder stretches; The described fork of respectively cutting is respectively equipped with the stull (2) that can Gong trample.

2, quick-expansion ladder as claimed in claim 1, it is characterized in that: described stull (2) is provided with guide groove (21), described formation cuts that one of fork is cut arm and stull (2) one ends are hinged, and another is cut arm and is provided with guide shaft (11), and described guide shaft (11) passes guide groove (12) and can slide in guide groove (12).

3, quick-expansion ladder as claimed in claim 1 is characterized in that: described stull (2) is located at and is respectively cut the top that fork two is cut the middle hinged place of arm.

4, as claim 1,2 or 3 described quick-expansion ladders, it is characterized in that: described drive unit comprises drive stay (3), pull bar (3) one ends and adjacent two are cut two of fork, and to cut arm coaxial hinged, in addition end is provided with tooth bar (32) and positioning tooth (31), and described adjacent two cut fork, and other two cuts the arm hinged place and be respectively equipped with tooth bar (32) meshed gears (42) and the location that cooperates with positioning tooth (31) and refer to (41).

5, as claim 1,2 or 3 described quick-expansion ladders, it is characterized in that: described drive unit comprises drive stay (3), pull bar (3) one ends and adjacent two are cut two of fork, and to cut arm coaxial hinged, and end is provided with leading screw and passes described adjacent two and cut fork and two cut the back-up ring that the arm hinged place is provided with and cooperate with nut in addition in addition.