CN201141279Y

CN201141279Y - Pedals type extension ladder

Info

Publication number: CN201141279Y
Application number: CN 200720059697
Authority: CN
Inventors: 梁尧广
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2008-10-29
Anticipated expiration: 2017-11-16

Abstract

The utility model relates to treading tensile ladder used for climbing in daily life and work. The treading tensile ladder is provided with a treading device to control the descending of the rungs, which is arranged on a moveable connecting bar at the inner side of the lowest rung; the connecting bar is connected through a steel wire or a chain with a transmission device which is arranged inside a box at the lowest rung; a transmission plate, approximately in the shape of U, is arranged at the tail end of the transmission device, with one end spliced with a couple switch. The treading tensile ladder is stable and safe to use, convenient to operate and is energy-saving.

Description

Foot-operated extension ladder

Technical field

The utility model relates to climbing uses ladder.

Background technology

Ladder designs and creates for human from ancient times, uses for a long time.So the ladder that uses is more because of the different needs style of use occasion now, wherein has a kind of ladder to stretch, so also be extension ladder.Extension ladder is the time spent not, and one withdraws successively, is reduced to very shortly, is convenient to deposit, and transportation is moved.During use one joint one is saved land and pulls out, the spacer pin on every joint is outwards ejected and locked on cleat stanchion, just the same with common ladder use, so that this extension ladder uses is also very convenient.Existing this extension ladder is controlled the form that step (riding club) falls and is mainly contained two kinds, and a kind of left and right sides slide switch (hairclipper) button of both hands pushing ladder riding club when buttressing cleat stanchion with left hand and right hand when being operation whenever pushes away ladder joint of withdrawing.Both hands should steady the ladder and can not allow it fall down when this mode was controlled, and pushed the slip hairclipper again arduously, and both operating difficulties often caused the riding club handle finger pressure that falls rapidly to hinder again and security incident occurs.Also having a kind of extension ladder, is two draw rings about first segment is provided with below ladder, and the operator need squat down and with the hands buttress the cleat stanchion bottom, simultaneously two draw rings are spurred downwards, easily because of the overturning of ladder crank, and all riding club is also easily beaten in the moment withdrawal and set about, and is very dangerous.

Summary of the invention

The purpose of this utility model provides a kind of foot-operated extension ladder, and unsafe major defect when operating to solve present similar ladder realizes stablizing, and safety is easy to operate and laborsaving.

Technical solution of the present utility model is the cleat stanchion at existing extension ladder, step, spacer pin, limit spring, on the basis of limit spring seat, the utility model has a foot-operated step Descent apparatus of controlling, foot-operated control the step Descent apparatus be arranged on that bed ladder post is inboard can movable connecting rod on, connecting rod links to each other with transmission device in being arranged on the bed ladder level box of ladder by steel wire or chain, the tail end of transmission device has the driver blade of approximate U font, the subsides of joining of driver blade one end and coupled switch.

More than the foot-operated step Descent apparatus of controlling of the present utility model comprise foot rest, the upper and lower mobile connecting rod of one end energy, wire rope or chain as stay cord, breast wheel, foot rest are fixed on the connecting rod movable end, and the connecting rod movable end is provided with pull bar upwards, the pull bar upper end is stretched into the step box and is communicated, as the wire rope or the chain of stay cord, an end and connecting rod fix, the other end by enter in the pull bar under the step box square box indoor and walk around breast wheel after be connected with transmission device.

More than transmission device described in the utility model comprise the indoor escapement hook of box of step box below, guiding trestle, and the dial in the step box, connecting rod, trundle, key seat, the box that driver blade, guiding trestle are fixed on below the step box is indoor, movable being arranged on the guiding trestle of escapement hook energy, dial is a disk that band gets a tooth pulled out, the circle center hole place is enclosed within on the bearing pin of step box wall, and the getting a tooth pulled out of dial inserted in the indoor escapement hook of square box under the step box, and escapement hook one end is connected with foot pedal apparatus steel wire or chain, the other end is connected with back-moving spring, dial both sides symmetry be provided with connecting rod, link end all links to each other with the trundle head end, the trundle on both sides all can movable being inserted in the key seat, trundle is provided with back-moving spring, the trundle tail end has pin, and pin inserts in the groove on the driver blade of nearly U font, the subsides of joining of driver blade U font one termination and coupled switch, coupled switch is the U-shaped sheet that oblique portion is arranged at monolateral side bottom, has a side of oblique portion to be close to the finger of spacer pin.

When the utility model uses, ladder is holded up, pushed down riding club with pin, promptly available hand stretches away ladder, puts in place when step draws high, and the spacer pin of riding club both sides promptly inserts in the cleat stanchion respective aperture under spring pressure, and riding club is locked, and ladder can use.

When finishing using, when withdrawing ladder, earlier with two hand steered firmly cleat stanchions, the presser feet pedal tramps with one's feet, the end that foot rest drives connecting rod between cleat stanchion moves down, by the escapement hook on steel wire or the chain pulling guiding trestle, getting a tooth pulled out of the moving dial of escapement hook strip is mobile, because the mobile dial that makes that gets a tooth pulled out is the rotation in the center of circle with the bearing pin, dial drivening rod during rotation, connecting rod drives trundle, and trundle drives driver blade, the driver blade top coupled switch that makes progress, the hypotenuse of coupled switch one side forces spacer pin to break away from the cleat stanchion locating hole, and this riding club falls immediately, as need this one-level more than riding club is fallen, then repeating aforesaid operations can fall upper level riding club again, falls to collecting state until whole riding clubs.This that is to say foot pedal once, promptly only falls the one-level riding club.

Only need two hand steered cleat stanchions during use, handle riding club with pin and descend step by step, can not occur fully weighing the finger accident wounded from minimum one-level, thus terraced good stability, safety.

The utility model has the advantages that to use and stablize, safety, easy to operate and laborsaving.

Description of drawings

Fig. 1 is an exterior structure schematic diagram of stretching out the part section of ladder of the present utility model;

Fig. 2 is an exterior structure schematic diagram after full reduced time of the present utility model;

Fig. 3 is foot rest of the present utility model position and organigram;

Fig. 4 is the utility model drive structure schematic diagram.

The specific embodiment

Shown in Fig. 1,2,3,4, the utility model is at cleat stanchion 2, draw ring 3, the step 16 of existing extension ladder, spacer pin 5, on the basis of spacer pin spring, spacer pin spring base, the utility model has the foot-operated step Descent apparatus of controlling, the foot-operated step Descent apparatus of controlling comprises foot rest 17, the movable connecting rod 18 of one end energy between two cleat stanchions, the connecting rod two ends have fixed cover 20 and sliding guide sleeve 21, pull bar 1 respectively, wire rope or chain 19, breast wheel 7.Foot rest 17 is fixed near the end that connecting rod 18 can move up and down, connecting rod 18 can swing up and down by the pin on fixed cover, sliding guide sleeve one end is provided with pull bar 1 upwards, and pull bar 1 upper end links to each other with escapement hook 12 by wire rope or chain 19, and the lower end links to each other with sliding guide sleeve 21.The utility model has transmission device, and it comprises the indoor escapement hook 12 of box of step box below, back-moving spring 22, guiding trestle 13, and the dial 11 in the step box, connecting rod 10, trundle 9, key seat 8, driver blade 6.The box that guiding trestle 13 is fixed on below the step box is indoor, escapement hook 12 is along the guide groove move left and right on the guiding trestle 13, escapement hook tail end links to each other with back-moving spring, dial 11 is the disks that band gets a tooth pulled out, the circle center hole place is enclosed within on the bearing pin of step box wall, getting a tooth pulled out of dial inserted in the escapement hook 12, in order to being become dial, the move left and right of escapement hook swings along the axle center, dial 11 both sides symmetries be provided with connecting rod 10, connecting rod 10 terminations all link to each other with trundle 9 head ends, all movable being inserted in the key seat of energy of trundle 9 on both sides, trundle is provided with back-moving spring, and the trundle tail end has pin, in the guide groove on the driver blade 6 of the nearly U font of pin insertion, driver blade 6U font one termination by with coupled switch 4 subsides of joining, coupled switch 4 has the strip sheet of oblique portion for bottom, one-sided limit, strip sheet has a side of oblique portion to be close to the finger of spacer pin 5.

Every have the foot-operated transmission device of controlling step Descent apparatus and the utility model indication all to belong to the utility model scope.

Claims

1, foot-operated extension ladder, comprise cleat stanchion, step, spacer pin, limit spring, the limit spring seat, it is characterized in that having a foot-operated step Descent apparatus of controlling, foot pedal apparatus be arranged on that bed ladder post is inboard can movable connecting rod on, connecting rod links to each other with transmission device in being arranged on the bed ladder level box of ladder by steel wire or chain, the tail end of transmission device has the driver blade of approximate U font, the subsides of joining of driver blade one end and coupled switch.

2, foot-operated extension ladder according to claim 1, it is characterized in that the foot-operated step Descent apparatus of controlling comprises foot rest, the upper and lower mobile connecting rod of one end energy, the upper and lower mobile pull bar of energy, steel cable or chain as stay cord, breast wheel, foot rest is fixed on the connecting rod movable end, the connecting rod movable end is provided with pull bar upwards, the pull bar upper end is stretched into the step box and is communicated, stay cord one end and connecting rod fix, the other end by enter in the pull bar under the step box square box indoor and walk around breast wheel after be connected with transmission device.

3, foot-operated extension ladder according to claim 1, it is characterized in that transmission device comprises the indoor escapement hook of box of step box below, guiding trestle, and the dial in the step box, connecting rod, trundle, key seat, driver blade, the box that guiding trestle is fixed on below the step box is indoor, movable being arranged on the guiding trestle of escapement hook energy, dial is a disk that band gets a tooth pulled out, the circle center hole place is enclosed within on the bearing pin of step box wall, the getting a tooth pulled out of dial inserted in the indoor escapement hook of square box under the step box, escapement hook one end is connected with foot pedal apparatus steel wire or chain, the other end is connected with back-moving spring, dial both sides symmetry be provided with connecting rod, link end all links to each other with the trundle head end, all movable being inserted in the key seat of energy of the trundle on both sides, trundle is provided with back-moving spring, and the trundle tail end has pin, in the groove on the driver blade of the nearly U font of pin insertion, the subsides of joining of driver blade U font one termination and coupled switch, coupled switch is the U-shaped sheet that oblique portion is arranged at monolateral side bottom, has a side of oblique portion to be close to the finger of spacer pin.