CN102116132A - Positioning device for moveable step ladder - Google Patents

Abstract

The invention provides a positioning device for a moveable step ladder, relating to the technical field of step ladders and aiming at solving the technical problem of poor stability of the existing step ladder. The step ladder comprises a ladder frame, two front wheels, two rear wheels, a positioning footboard, a rectangular moveable frame, a lock rod, a spring and a depositioning board, wherein the rear frame edge of the rectangular moveable frame is connected with the lower end of the ladder frame in a pivoting manner, and the two rear wheels are respectively installed on the edges of both sides of the rectangular moveable frame; the bottom of the front end of the ladder frame is provided with two bottom feet; the rear side edge of the positioning footboard is connected with the lower end of the ladder frame in a pivoting manner, the upper end of the lock rod is fixedly connected with the rear end of the positioning footboard, and the lower end of the lock rod is caused to downwards penetrate through the surface of the rectangular moveable frame; one end of the spring is fixedly connected with the lower end of the lock rod, and the other end of the spring is fixed at the front end of the ladder frame; the lower part of the lock rod is provided with a bayonet; and one end of the depositioning board is fixedly connected with the rectangular moveable frame, and the other end is caused to forwards extend out of the frame body. The step ladder can be conveniently moved and positioned.

Description

A kind of positioner that moves the ladder of ascending a height

Technical field

The present invention relates to the terraced technology of ascending a height, particularly relate to a kind of technology that moves the positioner of the ladder of ascending a height.

Background technology

In the daily production and operation of enterprise, usually need to carry out ascend operation; For example, having some overhead higher stations at production department needs the workman to carry out ascend operation, the material that needs the workman that part is left in higher position in storehouse in the warehouse access of ascending a height.

The mode that is used for ascend operation at present has following several: 1) adopt traditional bipod ladder to carry out ascend operation, because traditional bipod ladder is very easy to slip, there is very big potential safety hazard in therefore this operating type, and this ladder is also very high for the space requirement of operation field, uses very inconvenient; 2) adopt the common herringbone ladder of ascending a height to carry out ascend operation, this ladder stability of ascending a height is higher, be not easy in use to slip, but carrying is very inconvenient; 3) herringbone that adopts the bottom the to be provided with mobile device ladder of ascending a height carries out ascend operation, this ladder of ascending a height is made up of universal wheel and braking mechanism usually, can move easily by universal wheel after the releasing of brake mechanism, can utilize braking mechanism that universal wheel is locked after moving to assigned address; But under the situation of heavy duty, the phenomenon that braking mechanism can't locked universal wheel usually can take place, so its stability can't be guaranteed also under heavily loaded situation, can influence workman's job safety.

Summary of the invention

At the defective that exists in the above-mentioned prior art, technical problem to be solved by this invention provides a kind of conveniently moving, and stability is high, can guarantee workman's ascend operation safe mobile ladder of ascending a height

In order to solve the problems of the technologies described above, a kind of mobile ladder of ascending a height that has positioner provided by the present invention, comprise ladder, two front-wheels and two trailing wheels, it is characterized in that: also comprise a location pedal, a rectangle activity box, a locking bar, a spring, a location releasing plate;

The back edge of described rectangle activity box and ladder lower end articulate, and its pivot axis is parallel to ground, and described two trailing wheels are installed on respectively on the both sides edge of rectangle activity box; The bottom of described ladder front end is provided with two footing, and described two front-wheels are installed on the bottom of ladder rear end;

Described location pedal back side edge and ladder lower end articulate, and its pivot axis is parallel to ground, and the upper end of described locking bar is affixed with the location pedal rear end, and its axis normal is in the back side edge of location pedal, and its lower ends downward runs through the frame face of rectangle activity box; The lower end of described spring one end and locking bar is affixed, and the other end is fixed in the ladder front end;

The bottom of described locking bar is provided with a bayonet socket that is used for edge before the snap close rectangle activity box, and described bayonet socket is to open front, and its bore is corresponding with the preceding edge diameter of rectangle activity box;

Described positioning solution remove plate one end and rectangle activity box front end affixed, the other end is outside projecting forwardly to support body.

The mobile ladder of ascending a height that has positioner provided by the invention, by the cooperation of rectangle activity box, location pedal, locking bar and positioning solution except that plate, the ascend a height mode that lands of terraced front end of selection that can freedom and flexibility, when needs are mobile, front-wheel is landed, and do not needing when mobile, the footing of ladder front end is landed, have conveniently moving and the high characteristics of stability, can guarantee workman's ascend operation safety.

Description of drawings

Fig. 1 is the lateral view of the mobile ladder of ascending a height that has positioner of the embodiment of the invention;

Fig. 2 be the embodiment of the invention the mobile ladder of ascending a height that has a positioner in ladder, location pedal, rectangle activity box, locking bar, spring and positioning solution remove the connection diagram of plate.

The specific embodiment

Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.

As Fig. 1-shown in Figure 2, a kind of mobile ladder of ascending a height that has positioner that the embodiment of the invention provided, comprise ladder 1, two front-wheels 2 and two trailing wheels 3, it is characterized in that: comprise that also a location pedal 4, a rectangle activity box 5, a locking bar 6, a spring 7, a location remove plate 8;

The back edge of described rectangle activity box 5 and ladder 1 lower end articulate, and its pivot axis is parallel to ground, and described two trailing wheels 3 are installed on respectively on the both sides edge of rectangle activity box 5; The bottom of described ladder 1 front end is provided with two footing 9, and described two front-wheels 2 are installed on the bottom of ladder 1 rear end;

Described location pedal 4 back side edge and ladder 1 lower end articulate, and its pivot axis is parallel to ground, and the upper end of described locking bar 6 is affixed with pedal 4 rear ends, location, and its axis normal is in the back side edge of location pedal 4, and its lower ends downward runs through the frame face of rectangle activity box 5; The lower end of described spring 7 one ends and locking bar 6 is affixed, and the other end is fixed in ladder 1 front end;

The bottom of described locking bar 6 is provided with a bayonet socket that is used for edges before the snap close rectangle activity box 5, and described bayonet socket is to open front, and its bore is corresponding with the preceding edge diameter of rectangle activity box 5;

Described positioning solution remove plate 8 one ends and rectangle activity box 5 front ends affixed, the other end is outside projecting forwardly to support body 1.

When the embodiment of the invention moves, step on positioning solution earlier and remove plate (if two footing of ladder front end did not originally land, then omit this step), removing under the drive of plate the rectangle activity box in positioning solution pivots downwards around edge thereafter, the preceding edge of rectangle activity box moves down simultaneously, when the preceding edge of rectangle activity box is displaced downwardly to the bayonet socket place of locking bar bottom, the bayonet socket of locking bar blocks the preceding edge at the rectangle activity box under the tension of spring, this moment, two front-wheels landed, and two footing of ladder front end are pushed up overhead, and the ladder of ascending a height this moment can move easily;

After the embodiment of the invention moves to setting, step on earlier and locate pedal, behind the lower end of locking bar under the drive of location pedal, move, thereby the preceding edge of rectangle activity box is deviate from from the bayonet socket of locking bar bottom, two front-wheels that are installed on the rectangle activity box are not puted forth effort, this moment, two footing of ladder front end under action of gravity landed, and the utilization ladder of ascending a height that the operating personnel can safety carries out ascend operation.

Claims (1)

1. a positioner that moves the ladder of ascending a height comprises ladder, two front-wheels and two trailing wheels, it is characterized in that: also comprise a location pedal, a rectangle activity box, a locking bar, a spring, a location releasing plate;

The back edge of described rectangle activity box and ladder lower end articulate, and its pivot axis is parallel to ground, and described two trailing wheels are installed on respectively on the both sides edge of rectangle activity box; The bottom of described ladder front end is provided with two footing, and described two front-wheels are installed on the bottom of ladder rear end;

Described location pedal back side edge and ladder lower end articulate, and its pivot axis is parallel to ground, and the upper end of described locking bar is affixed with the location pedal rear end, and its axis normal is in the back side edge of location pedal, and its lower ends downward runs through the frame face of rectangle activity box; The lower end of described spring one end and locking bar is affixed, and the other end is fixed in the ladder front end;

The bottom of described locking bar is provided with a bayonet socket that is used for edge before the snap close rectangle activity box, and described bayonet socket is to open front, and its bore is corresponding with the preceding edge diameter of rectangle activity box;

Described positioning solution remove plate one end and rectangle activity box front end affixed, the other end is outside projecting forwardly to support body.

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