ES1060882U - Lifting device. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Lifting device, of the type comprising a self-supporting lifting structure (1), comprising inclined guiding means (2) constituted by two profiles (21) in "U" faced and joined by a plurality of crosspieces (22) ; a lifting carriage (3) ascending and descending on said guiding means (2) by means of wheels (33, 34, 35), and said carriage (3) being associated with at least one transport platform (31, 32). Merchandise and/or people; means for motorized movement of said carriage (3) with drive controls in one of the platforms (31, 32), characterized in that the carriage movement means (3) comprise a hydraulic cylinder (41) acting on an intermediate zone a flexible traction element (44) whose ends are fixed to a fixed point of the support structure (1) and to the trolley (3) by means of an anti-fall safety device (5); said safety fall prevention device (5) comprising: a support (51) integral with said carriage, two arms (52) mounted by means of respective rotary axes (53) on the support (51) and made possible to rotate between an inoperative position, in which its free ends are kept spaced from the guiding profiles (21), and an operative position in which said free ends act in opposite directions against the guiding profiles (21), braking the descent of the carriage (3), a displaceable shank (54) relating the opposite ends of the arms (52), a spring (58) acting on the displaceable shank (54) tending to keep the arms (52) in operative position and an anchor (57) of the flexible traction element (44), said anchor (57) being fixed to the displaceable stem (54), the arms (52) being maintained in inoperative position, due to the own weight of the carriage (3), while the flexible element (44) of traction is kept under nsiºn. (Machine-translation by Google Translate, not legally binding)

Description

Lifting device.

Object of the invention

The present invention relates to a device elevator, of the type of those comprising a self structure lifting support with inclined guide means, by which runs a carriage of longitudinal displacement, provided of at least one support platform for the positioning of the Operator and merchandise.

Background of the invention

There is currently a wide variety of wheelbarrows and devices used to lift loads and people. Among these devices are the trucks elevators, davits and other mechanisms that allow placing merchandise on shelves at different heights, and save unevenness In a warehouse. These devices seek to be the simplest possible for low maintenance and easy handling.

Some elevators are constituted by a self-supported structure with a bottom base, a frame of fastening and supporting struts of said frame in position inclined On the framework there are some guiding means for a car of longitudinal displacement, being associated to the car at less a platform to support merchandise and / or people. The structure can present at its base some wheels for your transport, a screen or a non-mobile base.

The platform or platforms for lifting the operator and merchandise moves together with the car to along the guiding means, being able to be arranged at the height convenient.

This platform generally incorporates a zone so that the operator can be and handle the controls of the mechanisms and a platform on which the goods that are placed must be introduced or removed from the shelves.

Some elevators of this type, as described In utility model 222586, the carriage is controlled by a winding drum of a tractor cable, being driven said by drum by a motor-brake These types of elevators present the disadvantage that the sudden fall of the car can occur in case of cable breakage, with the consequent risk of damage physical and material

Description of the invention

The lifting device of the present invention it includes some technical peculiarities that confer greater ease of use and improved safety in case of failure mechanic.

The device is of the type that includes a self-supporting lifting structure, with corresponding guidance means for moving and lifting the car.

According to the invention, the means of carriage drive comprise a hydraulic cylinder, related to a hydraulic group that supplies the pressure necessary and acting through a pulley over an area intermediate of a flexible traction element whose ends are they are fixed to the car and to a fixed point of the structure, of so that the extension of the cylinder causes the car to descend and cylinder retraction causes the car to rise.

On the platform are located the means of hydraulic group control that drives the hydraulic cylinder. The power that feeds the hydraulic group comes from a battery electrical incorporated on the structure.

According to the invention, the elevator comprises a safety device to prevent descent sudden carriage in case of breakage of the flexible element of traction.

This safety device comprises a support anchored to the top of the car. Said support It comprises two arms mounted by means of two axes and enabled to rotate between an inoperative position, in which their free ends are kept apart from the profiles of guided, and an operational position in which said free ends they act in opposite directions against the guiding profiles, braking The descent of the car. To drive these arms between the two service positions, there is a movable rod that relate the opposite ends of the arms, this stem being forced by a spring that acts tending to keep the arms in operational position In turn, there is also an anchor of the flexible traction element fixed to the movable rod, keeping your arms in an inoperative position, due to your own carriage weight, while the flexible traction element is keeps under tension.

The rod is mounted intern in two colosses defined at the rear ends of the arms and with possibility of movement in a slot longitudinal of the support.

It is planned that the lateral tread wheels are mounted on the support of the safety device, helping to keep it centered.

Description of the figures

To complement the description that is being performing and in order to facilitate the understanding of characteristics of the invention, is attached herein descriptive a set of drawings in which, for illustrative purposes and not limiting, the following has been represented:

- Figure 1 shows a profile view of the lifting device with self-supporting structure with the davit of the present invention.

- Figure 2 shows a sectional view according to the A-A plane of the car and the forming rail of the means of guidance.

- Figure 3 shows a sectional view according to the B-B 'plane of the safety device.

- Figure 4 shows an elevation view of the safety device in conditions of conventional use and without car lock

- Figure 5 shows an elevation view of the safety device in conditions of blocking the fall of the car.

Preferred Embodiment of the Invention

As can be seen in the figures referenced the lifting device comprises an auto structure lifting support (1), comprising a base with wheels, a inclined clamping frame and supporting struts of said framework. On the structure (1) there are guiding means (2) inclined and a carriage (3) transferable on said guiding means (2).

The car (3) presents a platform (31) for the merchandise support and a platform (32) for the support of the operator. In these platforms (31, 32) there are duplicate commands for carriage control.

The guiding means (2) comprise two profiles (21) in the form of "U" facing each other, united by a plurality of crossbars (22), the carriage (3) being mounted on the two profiles (21) by means of wheel sets (33 and 34) arranged outside and inside each profile (21). He carriage (3) also comprises a wheels (35) to avoid its lateral displacement

The means of movement are constituted by a hydraulic cylinder (41) associated with a hydraulic group (42) of pressure, said hydraulic cylinder (41) being associated by pulleys (43) with a flexible traction element (44) of the carriage (3) and anchored at the other end at a fixed point of the structure (1). The structure also comprises a battery electric (45) autonomous power of the hydraulic group (42).

The carriage (3) has at its upper end a safety device (5), consisting of a support (51) on which are mounted, by means of two shafts (53), two arms (52).

The arms (52) have one of their ends two longitudinal collisions (55) for mounting a rod (54) sliding on which a return spring (58) acts, which force the stem (54), tending to keep the arms in a operating braking position, in which said arms act with opposite ends against the guide profiles (21).

On the support (51) a mounted traction anchor (57) acting as a connecting element between the rod (54) and flexible tensile element (44). The tension of the flexible element (44) on the anchor (57) the effort is overcome of the spring (58) keeping the arms (52) in one position Inoperative during normal elevator operation.

The rod (54) is movable by a groove (56) longitudinal support (51), which allows its displacement between the two extreme positions that define the operative and inoperative positions of the arms (52).

Once the nature of The invention, as well as a preferred embodiment, is for the appropriate purposes that the materials, form, size and arrangement of the elements described may be modified, as long as this does not imply an alteration of the essential features of the invention claimed in continuation.

Claims (5)

1. Lifting device, of the type comprising a self-supporting lifting structure (1), comprising inclined guiding means (2) consisting of two "U" profiles (21) facing and joining by a plurality of crossbars (22) ; a carriage (3) of upward and downward transferable lifting on said guiding means (2) by means of wheels (33, 34, 35), and said carriage (3) being associated with at least one platform (31, 32) for transporting goods and / or people; motorized displacement means of said carriage (3) with drive controls on one of the platforms (31, 32), characterized in that the carriage means (3) comprise a hydraulic cylinder (41) acting on an intermediate zone of a flexible traction element (44) whose ends are fixed to a fixed point of the support structure (1) and to the carriage (3) by means of a fall protection device (5); said fall protection device (5) comprising: a support (51) integral with said carriage, two arms (52) mounted by means of two rotation axes (53) on the support (51) and capable of turning between an inoperative position , in which its free ends are kept apart from the guide profiles (21), and an operative position in which said free ends act in opposite directions against the guide profiles (21), slowing down the carriage descent (3) , a movable rod (54) that relates the opposite ends of the arms (52), a spring (58) acting on the movable rod (54) tending to keep the arms (52) in operative position and an anchor (57) of the flexible traction element (44), said anchor (57) being fixed to the movable rod (54), the arms (52) being kept in an inoperative position, due to the weight of the carriage (3), while the flexible element (44) traction remains subject to te nsion. 2. Device, according to claim 1, characterized in that the rod (54) is mounted in a perpendicular manner in individual collisions (55) defined at the rear ends of the arms (52) and with the possibility of movement in a longitudinal groove (56 ) of the support (51). Device according to claim 1, characterized in that it comprises a hydraulic pressure group (42) for feeding the cylinder (41). Device according to claim 3, characterized in that it comprises an electric battery (45) for autonomous power supply of the hydraulic group (42). 5. Device according to claim 1, characterized in that the lateral rolling wheels (35) are mounted on the support (51) of the safety device (5).