A kind of full folding climbing ladder of chain typeTechnical field
The invention belongs to utility field, and in particular to a kind of full folding climbing ladder of chain type.
Background technology
Cat ladder is substantially the everyday tools that every household is required for, and common cat ladder can not all fold substantially, and volume is big, longDegree length, space-consuming are larger.
Although there is the cat ladder of two sections of foldings on the market, and the cat ladder slided up and down, store still extremely difficult, receiptsRear volume of receiving is still very big, inconvenient to carry.And the higher ladder of height stores more difficult, going out, it is more inconvenient to carry.
The content of the invention
In view of the above-mentioned problems, the present invention is intended to provide full folding climbing ladder of chain type convenient for collecting, easy to carry.
The technical scheme of the present invention that solves the problems, such as is：A kind of full folding climbing ladder of chain type, including multiple head and the tail are sequentially connectedStep unit, the step unit include two the first parallel handrails, each with the first handrail lower end inside be hinged twoThe second parallel handrail；
Second handrail inner top side and lower end are respectively provided with the cross bar marked time, and the cross bar includes the first cross bar and the second horizontal strokeBar, it is hinged therebetween, and the first cross bar and the second cross bar can be along the pin joint doublings of the two；
The other end of first cross bar and the second cross bar is hinged with the second handrail respectively；
First handrail can rotate around the pin joint of itself and the second handrail along the longitudinal direction of the second handrail；
The hinged place of second handrail and the first cross bar, the second cross bar, which is equipped with, to be tensioned first, second cross bar and limitThe locking device that first handrail and the second handrail relatively rotate.
In such scheme, cross bar uses two sections of articulated structures, can be achieved laterally folded；First handrail and the second handrail pass throughRotation is achievable longitudinal folding, is folded step by step similar to driving chain is the same, it is equal with handrail length to may ultimately reach lengthSize, be extremely convenient for carrying.
Further, it is hinged between first handrail and the second handrail by rotating pin；
Be provided with through hole on the second handrail, positioned at the hinge area of first, second cross bar and the second handrail, on the first handrail withThe through hole corresponding position is provided with the first hole, and the first hole is equal with through-hole aperture；
The locking device includes installed in the locking hitching post that through hole is interior and coordinates with via clearance, is fixed on locking hitching postFirst connecting rod axle, it is fixed on the first cross bar and the second connecting rod axle and connecting rod of second cross bar one end；
The connecting rod two end is set on first connecting rod axle and second connecting rod axle, and can be rotated around first, second pitman shaft；
The locking hitching post can move axially along through hole, and be movable in the first hole.
In such scheme, when cat ladder deploys, second connecting rod axle drivening rod, connecting rod will then be locked by first connecting rod axleHitching post presses to the first hole from through hole, until after cross bar is fully deployed, locking hitching post is located in the first hole, and now the first handrail is turningWhile dynamic bearing pin and locking hitching post under effect, it is impossible to rotated relative to the second handrail.
When cross bar collapses, second connecting rod axle drivening rod, connecting rod then drives locking hitching post to horizontal stroke by first connecting rod axleBar collapse direction movement, and depart from the first hole, unlock locking of the hitching post to the first handrail.Afterwards pull both sides handrail toCentre is drawn close.
Further, the locking hitching post can turn round in through hole；
First cross bar, the second cross bar can rotate around the pin joint each with the second handrail along the longitudinal direction of the second handrail.
Specifically, first cross bar, the second cross bar are hinged with the second handrail by being engaged hinge, the occlusion hingeThe second blade and third blade including the first blade, with the first vane hinge；
The second blade lower end and third blade upper end are arcuate structure, and the arcwall face of two arcuate structures matches and stungClose, the second blade can be rotated against arcuately in face with third blade；
First blade is fixedly connected with first, second cross bar one end.
In such scheme, the first cross bar and the second cross bar are laterally folded and then to lock hitching post as rotating shaft, arcuately tieStructure is rotated to being hidden in the second handrail.
In a kind of specific scheme, the third blade upper end is provided with arcuate guide rail, and the second blade lower end is provided with and arcThe neck that shape guided way coordinates, neck after guided way snap-fit in guided way with can slide.
Preferably, it is hinged between first cross bar and the second cross bar by hinge.
The invention provides a kind of brand-new Foldable ladder, its remarkable result is shown：
1. folding convenient, volume after folding is small, is convenient for carrying.
2. due to being chain structure, length arbitrarily increases and decreases, and is short to step ladder, grows to tens of rice, can arbitrarily overlap.
3. in existing cat ladder technology, can shorten without a kind of cat ladder, and this cat ladder has the characteristics of shortening.In spyDifferent environment, such as in architectural engineering, in use, to take a scaffold height again inadequate on scaffold, take two scaffolds againSuperelevation, and any overlap joint function of this cat ladder, it just can overcome the disadvantages that this defect.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram after cat ladder of the present invention is fully deployed.
Fig. 2 is cat ladder partial schematic diagram.
Fig. 3 is in Fig. 2 I enlarged drawing.
Fig. 4 is occlusion hinge arrangement figure.
Fig. 5 is the state diagram after cross bar folds.
Fig. 6 is handrail folding process state diagram.
Fig. 7 is the schematic diagram after cat ladder folds completely.
In figure：1- step units, the handrails of 2- first, the handrails of 3- second, the cross bars of 4- first, the cross bars of 5- second, 6- rotational pinsAxle, 7- locking hitching posts, 8- first connecting rod axles, 9- second connecting rod axles, 10- connecting rods, 11- occlusion hinges, 12- hinges, 13- firstHole, the blades of 111- first, the blades of 112- second, 113- third blades, 114- guided ways, 115- necks.
Embodiment
For the ease of description, the relative position relation of each part（Such as：It is upper and lower etc.）Description be according to Figure of descriptionButut direction be described, restriction effect is not played to the structure of this patent.
As shown in Fig. 1~7, a kind of full folding climbing ladder of chain type, including the step unit 1 that multiple head and the tail are sequentially connected.It is describedStep unit 1 include two the first parallel handrails 2, each with the lower end inside of the first handrail 2 be hinged two parallel secondHandrail 3.
The inner top side of second handrail 3 and lower end are respectively provided with the cross bar marked time, and the cross bar includes the He of the first cross bar 4Second cross bar 5, it is be hinged by hinge 12 therebetween, and the first cross bar 4 and the second cross bar 5 can be along the pin joint doublings of the two.
The other end of first cross bar 4 and the second cross bar 5 is be hinged by being engaged hinge 11 with the second handrail 3 respectively.It is describedBeing engaged hinge 11 includes the first blade 111, the second blade 112 being hinged with the first blade 111 and third blade 113.It is describedThe lower end of second blade 112 and the upper end of third blade 113 are arcuate structure, and the arcwall face of two arcuate structures matches and is engaged,Second blade 112 can be rotated against arcuately in face with third blade 113.For example, a kind of preferable mode is the third blade113 upper ends are provided with arcuate guide rail 114, and the lower end of the second blade 112 is provided with the neck 115 coordinated with arcuate guide rail 114, neck115 after the snap-fit of guided way 114 in guided way 114 with can slide.
First blade 111 is fixedly connected with first, second cross bar one end.
First handrail 2 can rotate around the pin joint of itself and the second handrail 3 along the longitudinal direction of the second handrail 3.
The cross bar 4 of second handrail 3 and first, the hinged place of the second cross bar 5 is equipped with to be tensioned first, second cross barAnd limit the locking device that the first handrail 2 and the second handrail 3 relatively rotate.
It is be hinged by rotating pin 6 between the handrail 3 of first handrail 2 and second.
Through hole is provided with the second handrail 3, positioned at the hinge area of first, second cross bar and the second handrail 3.Helped firstThe first hole 13 is provided with hand 2 with the through hole corresponding position, the first hole 13 is equal with through-hole aperture.
The locking device includes installed in the locking hitching post 7 that through hole is interior and coordinates with via clearance, is fixed on locking boltFirst connecting rod axle 8 on post 7, it is fixed on the first cross bar and the second connecting rod axle 9 and connecting rod 10 of second cross bar one end.
The both ends of connecting rod 10 are set on first connecting rod axle 8 and second connecting rod axle 9, and can be connected around first, secondBar axle rotates.
The locking hitching post 7 can move axially along through hole, and be movable in the first hole 13.And locking hitching post 7 can be logicalTurned round in hole.
When being folded by Fig. 1 its fully unfolded position, first by the first cross bar 4 and the doubling of the second cross bar 5, second connecting rod axle9 drivening rods 10, connecting rod 10 then drives locking hitching post 7 to be moved to the cross bar direction that collapses by first connecting rod axle 8, and departs from theOne hole 13, unlock locking of the hitching post 7 to the first handrail 2.Pull the handrail on both sides to be drawn close to centre afterwards, form Fig. 5'sState.First cross bar 4 and the second cross bar 5 are laterally folded and then to lock hitching post 7 as rotating shaft, and arcuately structure is rotated to hiddenIt is hidden in the second handrail 3.
The first handrail 2 and the second handrail 3 are realized by rotation again it is longitudinal folding, it is the same step by step similar to driving chainFold, its process is as shown in Figure 6.The length size equal with handrail length is may ultimately reach, is extremely convenient for carrying.
Cat ladder expansion process is the inverse process of said process, and after first, second cross bar is fully deployed, locking hitching post 7 is located atIn first hole 13, under now the first handrail 2 acts on while rotating pin 6 and locking hitching post 7, it is impossible to helped relative to secondHand 3 rotates.