CN201794506U - Quick extension ladder combination - Google Patents

Abstract

A quick extension ladder combination is capable of meeting requirements of households, overhead operation and special rescue. The quick extension ladder combination comprises multiple groups of inner ladder legs and multiple groups of outer ladder legs, the inner ladder legs and the outer ladder legs are crossed via middle hinges by the aid of retractility of the diamond, upper and lower ladder legs can be connected via rotational joints, other ladder sections can be driven to extend or retract by extension or retraction of one ladder section so as to realize quick extension, and the ladder sections can be increased or reduced to realize height adjustment because the joints can be mounted and dismounted conveniently. After the ladder is extended, spring pins on the joints can pop into limiting grooves automatically so that the ladder is fixed well. When in retraction, the spring pins are pulled out and then placed on partition boards after rotating by about 90 degrees, the ladder is retracted in a direction opposite to the extending direction thereof, and finally the spring pins are turned back to be used at the next time.

Description

The quick-expansion combination ladder

Technical field:

The present invention relates to a kind of climbing instrument, definite say so a kind of can quick-expansion, and can be combined into the folding ladder of needed length as required fast.

Technical background:

There is the defective of use length by the length decision of ladder itself mostly in ladder in the market, cause carrying inconvenience, and be difficult to adapt to special rescue and ascend operation, then there is the problem of flexible trouble in some folding ladders, and ladder truck is for environment for use, site requirements is very high, owing to be subjected to the influence of building periphery place and various aerial lines, ladder truck can't use under a lot of situations, cost an arm and a leg owing to ladder truck again, many little county towns can't have, so higher aerial work and special rescue need a kind of not only be convenient for carrying but also can quick-expansion, can also increase and decrease the ladder of length according to demand.

Summary of the invention:

The present invention is exactly to ascend a height limitedly in order to solve traditional ladder, and the problem of carrying inconvenience provides a kind of folding combination ladder, satisfies the demand of work high above the ground and special rescue.

This programme is a kind of quick-expansion combination ladder, comprise many group inner ladder legs and outer ladder leg, stull is contained on the inner ladder leg, it is characterized in that: every group of inner ladder leg (6) is connected by middle hinge (7) with outer ladder leg (5), shrink fully or when launching in outer ladder leg overlap, cross-shaped when partly launching, one group of bench is launched to drive all the other group bench and is launched simultaneously.Connect by rotatable joint between every group of bench, the maximum angle of spread in joint is 180 °; Connect by the joint (1,2) that is provided with stuck mechanism between inner ladder leg, be placed with by push rod (2.4) in the left semiarthrosis (2) in this joint, spring catch and dividing plate (2.1) that spring pin block (2.2) and spring (2.3) are formed have stopper slot (1.1) on the right semiarthrosis (1); Connect by subjoint (3,4) between outer ladder leg.Because the joint easy accessibility can increase or reduce bench as required, reach the effect of regulating height.Only need when launching this ladder interior outer ladder leg is rotated by hinge, the rhombus of formation is slowly launched, last rhombus both sides overlap in alignment, and the spring catch on the joint springs in the stopper slot automatically at this moment, and ladder is fixed.During contraction spring catch is extracted, rotated about 90 ° it is placed on the dividing plate, this moment, the joint was rotatable again, opposite direction during according to expansion is kept ladder well, the reverse rotation spring catch, use in order to next in the hole that the spring pin block is passed on the dividing plate, with the rope that ties up on the ladder ladder is tied at last.Only need the bolt that connects the joint is outwarded winding when interpolation or minimizing bench, bench can be separated.For convenient in carrying, can on foot of ladder, add contractile wheel, when carrying, wheel is launched, just can haul as luggage case, during use wheel is accepted, just can normally use.

The present invention is skillfully constructed, and is applied widely, portably uses conveniently, and can regulate length as required, can not only satisfy family expenses, also can satisfy work high above the ground and special rescue or escape needs.

Description of drawings:

Fig. 1 is the complete unfolding assumption diagram in joint

Fig. 2 is the complete unfolding assumption diagram of subjoint

Fig. 3 is single bench structure chart

Fig. 4 is ladder structure figure

Lateral view when Fig. 5 partly launches for ladder

The specific embodiment:

As shown in Figure 5, when ladder is launched, catch the foot of ladder of inner ladder leg 6 and outer ladder leg 5, outer ladder leg is around hinged 7 rotations in making, and make foot of ladder close mutually, joint and subjoint rotate simultaneously, outer ladder leg becomes cross-like in making, the connection that assumes diamond in shape between the bench, and the most inside and outside terraced leg merges, when merging, launch fully in joint as shown in Figure 1, and the spring pin block 2.2 on the left semiarthrosis 2 springs under the effect of spring 2.3 in the stopper slot 1.1 of right semiarthrosis 1, and arthrodesis is lived, make ladder no longer flexible, so can climb.In the time of ladder need being shunk, need lift push rod 2.4, spring pin block 2.2 is broken away from stopper slot 1.1, and rotate about 90 °, unclamp push rod 2.4, spring pin block 2.2 is placed on the dividing plate 2.1, this moment, the joint can be rotated again again, with the opposite direction fork of interior outer ladder leg when launching, ladder automatically downwards shrinks, after ladder is kept well, and push rod on the semiarthrosis 2 of a reverse rotation left side 2.4 about 90 °, make spring pin block 2.2 pass the hole on the dividing plate 2.1 and the EDGE CONTACT of right semiarthrosis 1, in order to using next time.When needing to reduce bench, 4 bolts 8 that need to connect right semiarthrosis 1 and left semiarthrosis 2 and to be connected right half subjoint 4 and left half subjoint 3 unload, bench is as shown in Figure 3 taken out, and the two parts with needs couple together by bolt 8 again, and then process is opposite therewith to need to increase bench.Because the structure in joint is mutually nested, so the maximum angle of spread in joint is 180 °.

Claims (2)

1. quick-expansion combination ladder, comprise many group inner ladder legs and outer ladder leg, stull is contained on the inner ladder leg, it is characterized in that: every group of inner ladder leg (6) is connected by middle hinge (7) with outer ladder leg (5), shrink fully or when launching in outer ladder leg overlap, cross-shaped when partly launching, one group of bench is launched to drive all the other group bench and is launched simultaneously.

2. quick-expansion combination ladder according to claim 1 is characterized in that: connect by rotatable joint between every group of bench, the maximum angle of spread in joint is 180 °; Connect by the joint (1,2) that is provided with stuck mechanism between inner ladder leg, be placed with by push rod (2.4) in the left semiarthrosis (2) in this joint, spring catch and dividing plate (2.1) that spring pin block (2.2) and spring (2.3) are formed have stopper slot (1.1) on the right semiarthrosis (1); Connect by subjoint (3,4) between outer ladder leg.

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