CN2264247Y - Movable pedal ladder - Google Patents

Abstract

The utility model relates to a folding movable ladder which is arranged on a fixed object permanently. A balance mechanism of the ladder is composed of a balancing spring of an upright post, a pulley wheel, a steel cable, a hanging component of the ladder, etc. When the ladder is laid down to work, the weight of a hanging arm of the ladder is transferred to the balancing spring by the steel cable, and the balancing spring is compressed to generate elastic force which is exactly balanced to the weight of the hanging arm of the ladder. The movable ladder which can be stopped in any working positions can not be slid up and down. The utility model has the advantages of flexible operation and high safety.

Description

The Active foot plate ladder

The utility model belongs to the movable ladder field, and is particularly folding, permanently be contained in ladder on the fixture.

Movable ladder manufacturer at home is more, KTS-A, TTM-A, KTL-A type mobile ladder that the petrolem machinery factory, Lianyungang produces, as shown in Figure 1, this mobile ladder is used for the safety walking of operating personnel between fixed platform and differing heights tank car top, and it is by connecting rod, pedal, spring cylinder balanced controls, hand rail, turning cylinder, fixedly parts such as chain are formed.Collapsible when this ladder does not use, be erected on the fixed platform, during use, the ladder movable part can be released and put down, and contacts with the tank car top or suspends aerial.One end of ladder master connecting-rod connects with turning cylinder, the spring cylinder medi-spring Spring balanced by compression of formed self cantilevered weights of major-minor connecting rod, pedal, hand rail and mobile ladder one side.Because mobile ladder has only a side to be provided with the spring cylinder balanced controls, the ladder unbalance stress causes the ladder opposite side to be subjected to gravity and tilts, and stuck phenomenon takes place easily.When the mobile ladder knee-action, the pull bar lower end in the spring cylinder is because along with fixed axis movement in a curve up and down, swing also takes place in spring cylinder in addition, the spring cylinder outer wall is provided with rotating shaft, and connect with bracing frame on the column and rotate, this mobile ladder complex structure is not compact, and manufacturing cost is higher.

The purpose of this utility model is to improve the spring cylinder balanced controls of mobile ladder, and the column and the spring cylinder of mobile ladder is integrated, and simplifies the internal structure of an organization, and reduces cost, and makes rational in infrastructure, the stress equalization of mobile ladder, makes the mobile ladder flexible operation, and is safe and reliable.

The technical solution of the utility model is; The lower end of putting into balancing spring, balancing spring in two heel posts respectively is by the pallet clamping, the upper end heads on back of the body cap, back of the body cap is fixed in the column, column is fixed a pulley spindle and pulley in the upper end, wire rope one end is through pulley, pass garden in the back of the body cap centre bore and the balancing spring, connects with pallet and fastening, fixed axis connects fastening outside the wire rope other end and the master connecting-rod.When ladder puts down work, master connecting-rod rotates along turning cylinder, fixed axis is also done movement in a curve downwards thereupon, the downward tense wire rope of fixed axis, wire rope is upwards strained pallet through pulley, makes balancing spring be subjected to force compresses, makes it and ladder self cantilevered weights balance, the Active foot plate ladder can stop in any operating position, and is also recoverable folding.

The utility model has the advantages that compact conformation, simplify spring cylinder in column, reduce cost, because two heel posts and connecting rod are all simultaneously stressed, whole ladder force structure is reasonable, and can not cause the ladder inclination and stuck phenomenon takes place, flexible operation, safe and reliable.

Fig. 1, spring cylinder balanced controls mobile ladder schematic diagram

Fig. 2, column spring balancing mechanism Active foot plate ladder schematic diagram

Fig. 2, Fig. 2 lateral view

Among the figure: 1, column; 2, spring cylinder; 3, pull bar; 4, hand rail; 5, master connecting-rod; 6, slave connecting rod: 7, fixed axis; 8, fixing chain; 9, wire rope; 10, pulley; 11, pulley spindle; 12, back of the body cap; 13, pallet; 14, balancing spring; 15, turning cylinder; 16, pedal; 17, base; 18, location-plate.

Active foot plate ladder base (17) is fixed on the platform, column (1) is fixed on the base (17), the master connecting-rod of ladder (5) can rotate along turning cylinder (15), pedal (16) is fixed in the master, slave connecting rod (5), (6) on, hand rail (4) one ends connect with column (1), the other end connects with front end pedal (16), when the Active foot plate ladder does not use, can retract platform, make ladder folding, be erected on the platform, when the Active foot plate ladder work does, can open and put down, stair treads can stop in any operating position, for the body weight and the safety of bearing the operative employee, behind the ladder location, fixedly chain (8) tension is inserted in location-plate (18) groove of column (1) upper end.

When the Active foot plate ladder puts down work, the own wt of ladder cantilever comes balance with spring balancing mechanism, its structure is as follows: put into balancing spring (14) respectively in Active foot plate ladder two heel posts (1), the lower end of balancing spring (14) is by pallet (13) clamping, balancing spring (14) upper end heads on back of the body cap (12), back of the body cap (12) is fixed in the principal post (1), fix a pulley spindle (11) and pulley (10) wire rope (9) one ends in column (1) upper end through pulley (10), passing back of the body cap (12) centre bore and the interior garden of balancing spring (14) connects also fastening with pallet (13), wire rope (9) other end connects fastening with master connecting-rod (5) outside fixed axis (7), when the Active foot plate ladder puts down work, master connecting-rod (5) is rotated down along turning cylinder (15), fixed axis (7) is also done movement in a curve downwards thereupon, wire rope (9) one ends are strained downwards, wire rope (9) other end is upwards strained pallet (13) through pulley (10), balancing spring (14) is subjected to force compresses, make it and ladder self cantilever gravitational equilibrium, the operative employee is push-and-pull Active foot plate ladder gently, can stop in arbitrary operating position, when ladder is regained, fixed axis (7) is along with master connecting-rod (5) is upwards done movement in a curve, wire rope (9) loosens thereupon, and balancing spring (14) sets back.

Claims (1)

1, a kind of Active foot plate ladder, it is by turning cylinder, connecting rod, pedal, hand rail, column, fixedly composition such as chain is characterized in that the balanced controls of Active foot plate ladder comprise; Column, balancing spring, pallet, back of the body cap, pulley, pulley spindle, wire rope, fixed axis etc., be placed with balancing spring, balancing spring lower end in two heel posts respectively by the pallet clamping, the upper end heads on back of the body cap, back of the body cap is fixed in the column, column is fixed a pulley spindle and pulley in the upper end, wire rope one end is through pulley, and the interior garden of back of the body cap centre bore and balancing spring of passing connects with pallet and be fastening, and the wire rope other end connects fastening with master connecting-rod outside fixed axis.

Images