A kind of full folding climbing ladder of chain typeTechnical field
The invention belongs to utility fields, and in particular to a kind of full folding climbing ladder of chain type.
Background technique
Ladder is substantially the everyday tools that every household requires, and common ladder is not substantially foldable, and volume is big, longDegree length, occupied space are larger.
Although having the ladder of two sections of foldings, and the ladder slided up and down on the market, still extremely difficult, receipts are storedRear volume of receiving is still very big, inconvenient to carry.And the higher ladder of height stores more difficult, and it is more inconvenient to go out to carry.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide the full folding climbing ladder of chain type convenient for collecting, easy to carry.
The technical solution that the present invention 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, respectively two with the first handrail lower end inside hingedlyThe 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 first crossbar andTwo cross bars, it is hinged therebetween, and first crossbar and second crossbar can be along the hinge joint doublings of the two；
The other end of first crossbar and second crossbar is hinged with the second handrail respectively；
First handrail can be rotated around the hinge joint of itself and the second handrail along the longitudinal direction of the second handrail；
The hinged place of second handrail and first crossbar, second crossbar, which is equipped with, to be tensioned the first, second cross bar simultaneouslyLimit the locking device that the first handrail and the second handrail relatively rotate.
In above scheme, cross bar is using two sections of articulated structures, it can be achieved that laterally folded；First handrail and the second handrail pass throughRotation can be achieved longitudinal folding, folds 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, hinged by rotating pin between first handrail and the second handrail；
It is equipped with through-hole on the second handrail, positioned at the hinge area of the first, second cross bar and the second handrail, in the first handrailThe upper and through-hole corresponding position is provided with the first hole, and the first hole is equal with through-hole aperture；
The locking device includes being mounted on the locking hitching post in through-hole and to fit with the through hole, being fixed on locking hitching postOn first connecting rod axis, be fixed on the second connecting rod axis and connecting rod of first crossbar and second crossbar one end；
The connecting rod two end is set on first connecting rod axis and second connecting rod axis, and can be around the first, second pitman shaftRotation；
The locking hitching post can be moved axially along through-hole, and be movable in the first hole.
In above scheme, when ladder is unfolded, second connecting rod axis drives connecting rod, and connecting rod, which will then pass through first connecting rod axis, to be lockedHitching post presses to the first hole from through-hole, until locking hitching post is located in the first hole after cross bar is fully deployed, the first handrail is turning at this timeWhile dynamic pin shaft and locking hitching post under effect, it can not be rotated relative to the second handrail.
When cross bar collapses, second connecting rod axis drives connecting rod, and connecting rod then passes through first connecting rod axis and drives locking hitching post to crossThe bar direction that collapses is mobile, and is detached from the first hole, and unlock locking of the hitching post to the first handrail.Later pull both sides handrail toCentre is drawn close.
Further, the locking hitching post can turn round in through-hole；
The first crossbar, second crossbar can be around respectively with the hinge joint of the second handrail along the longitudinal direction rotations of the second handrailTurn.
Specifically, the first crossbar, second crossbar pass through hinged, the occlusion hinge that is engaged hinge with the second handrailThe second blade and third blade including the first blade and the first vane hinge；
Second blade lower end and third blade upper end are arcuate structure, and the arcwall face of two arcuate structures matches simultaneouslyOcclusion, the second blade and third blade can arcuately face relative rotation；
First blade is fixedly connected with first, second cross bar one end.
In above scheme, first crossbar and second crossbar are laterally folded and then to lock hitching post as shaft, arcuately tieStructure is rotated to being hidden in the second handrail.
In a kind of specific scheme, the third blade upper end is equipped with arcuate guide rail, and the second blade lower end is equipped with and arcThe card slot of shape guided way cooperation, card slot can be slided with after guided way snap-fit in guided way.
Preferably, hinged by hinge between the first crossbar and second crossbar.
The present invention provides a kind of completely new Foldable ladder, remarkable result is shown:
1. folding convenient, volume after folding is small, is convenient for carrying.
2. length arbitrarily increases and decreases due to being chain structure, it is short to step ladder, tens of rice is grown to, can arbitrarily overlap.
3. it can shorten in existing ladder technology without a kind of ladder, and this ladder has the characteristics that shorten.In spyDifferent environment, such as in architectural engineering takes two scaffolds again in use, to take a scaffold height again inadequate on scaffoldSuperelevation, and any overlap joint function of this ladder just can overcome the disadvantages that this defect.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is the schematic diagram after ladder of the present invention is fully deployed.
Fig. 2 is ladder partial schematic diagram.
The enlarged drawing that Fig. 3 is in Fig. 2 I.
Fig. 4 is occlusion hinge arrangement figure.
Fig. 5 is the folded state diagram of cross bar.
Fig. 6 is the state diagram of handrail folding process.
Fig. 7 is the completely folded schematic diagram of ladder.
In figure: 1- step unit, the first handrail of 2-, the second handrail of 3-, 4- first crossbar, 5- second crossbar, 6- rotational pinAxis, 7- lock hitching post, 8- first connecting rod axis, 9- second connecting rod axis, 10- connecting rod, 11- occlusion hinge, 12- hinge, 13- firstHole, the first blade of 111-, the second blade of 112-, 113- third blade, 114- guided way, 115- card slot.
Specific embodiment
For ease of description, the description of the relative positional relationship (such as: upper and lower) of each component is 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 sequentially connected step unit 1 of multiple head and the tail.It is describedStep unit 1 includes two the first parallel handrails 2, respectively two parallel second with 2 lower end inside of the first handrail hingedlyHandrail 3.
Second handrail, 3 inner top side and lower end are respectively provided with the cross bar marked time, and the cross bar includes 4 He of first crossbarSecond crossbar 5, it is hinged by hinge 12 therebetween, and first crossbar 4 and second crossbar 5 can be along the hinge joint doublings of the two.
The other end of first crossbar 4 and second crossbar 5 is respectively with the second handrail 3 by being engaged hinge 11 hingedly.It is describedBeing engaged hinge 11 includes the first blade 111, second blade 112 and third blade 113 hinged with the first blade 111.It is describedSecond blade, 112 lower end and 113 upper end of third blade are arcuate structure, and the arcwall face of two arcuate structures matches and is engaged,Second blade 112 and third blade 113 can arcuately face relative rotation.For example, a kind of preferred mode is the third blade113 upper ends are equipped with arcuate guide rail 114, and 112 lower end of the second blade is equipped with the card slot 115 cooperated with arcuate guide rail 114, card slot115 can slide with after 114 snap-fit of guided way in guided way 114.
First blade 111 is fixedly connected with first, second cross bar one end.
First handrail 2 can be rotated around the hinge joint of itself and the second handrail 3 along the longitudinal direction of the second handrail 3.
Second handrail 3 and the hinged place of first crossbar 4, second crossbar 5 are equipped with and can be tensioned the first, second cross barAnd limit the locking device that the first handrail 2 and the second handrail 3 relatively rotate.
It is hinged by rotating pin 6 between first handrail 2 and the second handrail 3.
Through-hole is equipped on the second handrail 3, positioned at the hinge area of the first, second cross bar and the second handrail 3.It is helped firstThe first hole 13 is provided on hand 2 with the through-hole corresponding position, the first hole 13 is equal with through-hole aperture.
The locking device includes being mounted on the locking hitching post 7 in through-hole and to fit with the through hole, being fixed on locking boltFirst connecting rod axis 8 on column 7, the second connecting rod axis 9 and connecting rod 10 for being fixed on first crossbar and second crossbar one end.
10 both ends of connecting rod are set on first connecting rod axis 8 and second connecting rod axis 9, and can be connected around first, secondThe rotation of bar axis.
The locking hitching post 7 can be moved axially along through-hole, and be movable in the first hole 13.And locking hitching post 7 can be logicalIt is turned round in hole.
When being folded by the fully unfolded position of Fig. 1, first by 5 doubling of first crossbar 4 and second crossbar, second connecting rod axis9 drive connecting rods 10, and connecting rod 10 then drives locking hitching post 7 mobile to the cross bar direction that collapses by first connecting rod axis 8, and disengaging theOne hole 13, unlock locking of the hitching post 7 to the first handrail 2.It pulls the handrail on both sides to draw close to centre later, forms Fig. 5'sState.First crossbar 4 and second crossbar 5 are laterally folded and then to lock hitching post 7 as shaft, and arcuately structure is rotated to hiddenIt is hidden in the second handrail 3.
It is again that the first handrail 2 and the second handrail 3 is longitudinal folding by rotation realization, it is the same step by step to be similar to driving chainIt folds, process is as shown in Figure 6.It may ultimately reach the length size equal with handrail length, be extremely convenient for carrying.
The inverse process that process is the above process is unfolded in ladder, and after the first, second cross bar is fully deployed, locking hitching post 7 is located atIn first hole 13, the first handrail 2 can not be helped while rotating pin 6 and locking hitching post 7 under effect relative to second at this timeHand 3 rotates.