ES1272875U - Lifting crane (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Lifting crane, formed by a base (1) and with a roller (10) and at least one pulley (8) for diverting a lifting cable (9), characterized in that the base (1) supports a mast (2) vertical in which a lateral arm (6) finished off in a bypass pulley (8) is coupled, the arm (6) being horizontally orientable with respect to the base (1). (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Lifting crane

TECHNICAL SECTOR

The present application refers to a lifting crane, easily portable or demountable, which allows lifting loads to a considerable height.

It is applicable, among other fields, in the construction or remodeling of buildings.

STATE OF THE ART

Cranes for lifting loads to high levels are known in the state of the art. Some cranes are located on the ground and comprise tall crane arms, often telescopic, and are limited in height to the length of the arm.

There are also gantry cranes or other cranes that have a fixed, large structure, and that can rotate or move to move the load.

These cranes are extremely bulky and cannot be located anywhere. They require a sturdy floor, a wide access road, and a long time for their installation.

The applicant does not know of any system that can solve all these problems.

BRIEF EXPLANATION OF THE INVENTION

The invention consists of a lifting crane according to claim 1. Its different variants solve the problems outlined.

It is designed to be located in height, for example on the floor of a building where you want to take the load, or from where you want to remove it. It is small in size, easily foldable or removable.

The lifting or hoisting crane is made up of a base from which a vertical mast and a lateral arm emerge. At the free end of the arm there is a bypass pulley for a hoisting rope. A roller picks up the cable when desired, for example thanks to a motor. The arm is horizontally adjustable, that is, it can rotate along a vertical axis. For example, by making the mast (2) rotatable on the base.

The system must be highly stable, and there are several solutions: ballasts, stabilizing extendable legs ... For example, in one embodiment the mast has an upper extension finished in upward-facing extendable stabilizing members. The extendable members will extend perpendicular to the mast to increase the distance from the stabilizing moment.

Other variants can be seen in the rest of the report.

DESCRIPTION OF THE FIGURES

For a better understanding of the invention, the following figures are included.

Figure 1: Side view of a preferred embodiment.

Figure 2: Detail view of the lower part of the mast and possible arm positions.

MODES OF EMBODIMENT OF THE INVENTION

An embodiment of the invention will be briefly described below, as an illustrative and non-limiting example thereof.

Figure 1 shows an example of embodiment formed by a base (1), which supports a vertical mast (2). The mast (2) is normally round and is preferably extensible. The base (1) can have stabilizing legs (3), lockable wheels, etc. In the figure, the base (1) has ballasts (4) arranged in couplings made on some legs (3). These ballasts (4) can be replaced by other solutions. For example, the mast (2) may have an upper extension (5) to be supported by pressure against the ceiling of the floor where the crane is installed. This upper extension (5) may in turn have stabilizing extensible members.

The legs (3) can have threaded, inclined bushings (31), with height adjusters for the stabilizers. These stabilizers will be anti-vibration to increase safety. The ballasts (4) will be fixed to the legs (3), when necessary, securely.

A lateral arm (6) arises from the mast (2), preferably telescopic. The arm (6) is attached to the mast (2) by two plates (7) with through holes, so that a series of removable pins (7 ') secure it in position at the desired angle (figure 2). The arm (6) can be oriented in any horizontal direction, either by being mounted on a rotating bracket of the fixed mast (2) or because the mast (2) itself can rotate on the base (1).

At the free end of the arm (6) there is a bypass pulley (8), for the passage of a cable (9) that is guided along the arm (6) and the mast (2) to a roller (10 ) cable collection (9). This cable (9) is finished in the hook or fixing for the load. The crane can have other bypass pulleys (8) (figure 2).

The roller (10) is oriented at the same time as the arm (6) and is generally on the side of the mast (2) opposite the arm (6). The roller (10) is normally motorized and has a control panel. This motor can be remotely controlled to increase safety. Likewise, the rotation of the arm (6) or the mast (2) is preferably motorized and remotely controlled.

The base (1) can have a system of rings to couple the mast (2), rotating, ensuring that it cannot be accidentally pulled out or removed. These rings comprise rods that are inserted (threaded) in a channel of the mast (2), in such a way that they limit the extraction but not the rotation. In the mast (2) a bolt is welded in the upper part with plate reinforcements. The bolt is machined to insert the pulley and includes a thread in the center where the cable guard and pulley stop are screwed, so that the cable (9) can be diverted to the arm (6). The crane may have, for example on the cable itself (9), load sensors to ensure that the use does not exceed the approved conditions.

In the most preferred embodiment, the mast (2) is rotatable as a whole and the roller (10) is supported by it thanks to a shelf (11) removable from the mast (2).

Claims (1)

1- Lifting crane, formed by a base (1) and with a roller (10) and at least one pulley (8) for shunting a lifting cable (9), characterized in that the base (1) supports a mast (2) vertical in which a lateral arm (6) finished off in a bypass pulley (8) is coupled, the arm (6) being horizontally orientable with respect to the base (1). 2- Lifting crane, according to claim 1, characterized in that the mast (2) is rotatable on the base (1). 3- Lifting crane, according to claim 1, characterized in that the mast (2) has an upper extension (5) finished off in extendable stabilizing members (51) oriented upwards. 4- Lifting crane, according to claim 1, characterized in that the base (1) comprises stabilizing extensible legs (3). 5- Lifting crane, according to claim 4, characterized in that at least one leg (3) has a coupling for a ballast (4). 6- Lifting crane, according to claim 1, characterized in that the roller (10) is motorized. 7- Lifting crane, according to claim 1, characterized in that the roller (10) is mounted on a removable shelf (11). 8- Lifting crane, according to claim 4, characterized in that the legs (3) have threaded, inclined bushings (31), with height adjusters for the stabilizers. 9. Lifting crane, according to claim 1, characterized in that the arm (6) is fixed to the mast (2) by two plates (7) with through holes and one or more removable pins (7 '). 10. Lifting crane, according to claim 6, characterized in that the roller (10) is remotely controlled.