ARRANGEMENT INTRODUCED IN A DEVICE HAVING A HOOK FOR ANCHORING A LADDER TO CABLES

Abstract

The present patent application belongs to the field of workplace safety equipment and proposes an improvement to a device provided with a hook for anchoring a ladder to cables. The ladder is formed by a main structure (1) having in the center thereof an articulated hook (2). The main structure (1) comprises an extensible shaft in the upper portion thereof, allowing it to be coupled between two steps of a service ladder. In order to overcome drawbacks, a rope holder (8) has been developed, which is arranged in the lower portion of the main structure and locks the rope tying the hook (2), preventing the hook (2) from turning upside down or from opening. The rope holder also has two lateral toroidal locks (18) coupled to the step (20) of the ladder, each on one side of the main structure (1), preventing the main structure from shifting

Claims

1. Arrangement introduced in a device having a hook for anchoring a ladder to cables consisting of main structure (1) of rectangular prismatic geometry provided at its center with an hinged hook (2), the rear end of which has an extension in which a through hole (3) is provided for attaching a rope (16), whereas the upper end of the main frame (1) has a longitudinal threaded shaft (4), provided with a handle (5) in the upper portion with a rectangular prismatic one-piece (6) coupled to said threaded shaft (4), which has on its rear face a concave surface (7) characterized in that at the lower end of the main frame (1), there is a rope grip (8) consisting laterally of an inverted U-shaped support (9) which bears two semi-cylindrical elements (1) with grooved-like teeth positioned side by side, in which upper portions there is a rope limiting element (11) having at the center of its lower face a half-round longitudinal recess (12) and two axes (13) which project perpendicularly downwardly in its rear portion and attach to holes of the same cross-section provided in the rear portion of the lower base (14) on which the semi-cylindrical elements (10) are mounted, whereas in the rope limiting element (11), through holes (15) matching the threaded holes are provided at the center of the semi-cylindrical elements (10), in which screws passing through the rope limiting element (11) are secured, while in the upper step (20), in which the upper portion of the main frame (1) is attached, and on each side of such main frame (1), two side latches (18) of toroidal geometry are provided, with each of these side latches being divided into two equal parts in semi-annular shapes and are installed in the ladder step (20) by means of screws and nuts.

Description

DESCRIPTION OF THE DRAWINGS

[0019] Next, for a better understanding and comprehension of the device the attached illustrative drawings are shown where the following is observed:

[0020] FIG. 1It depicts a front perspective view of a ladder provided with the hook for anchoring ladders to cables, with the hook open, supported on horizontal cables.

[0021] FIG. 2It depicts a front perspective view of a ladder provided with the hook for anchoring ladders to cables supported on horizontal cables with the hook closed.

[0022] FIG. 3It depicts a rear perspective view of a ladder provided with the hook for anchoring ladders to cables with the hook open.

[0023] FIG. 4It depicts a rear perspective view of a ladder provided with the hook for anchoring ladders to cables with the hook closed.

[0024] FIG. 5It depicts a side perspective view of the equipment provided with the hook for anchoring ladders to cables with the hook in the open position.

[0025] FIG. 6It depicts a side perspective view of the equipment provided with the hook for anchoring ladders to cables with the hook in the closed position.

[0026] FIG. 7It depicts a side rear perspective view of the rope grip that integrates the equipment provided with the hook for anchoring ladders to cables.

[0027] FIG. 8It depicts a low front perspective view of the rope grip that integrates the equipment provided with the hook for anchoring ladders to cables.

[0028] FIG. 9It depicts a low front perspective view of the rope grip, without the rope limiter, which integrates the equipment provided with the hook for anchoring ladders to cables where the semi-cylindrical gears can be observed.

[0029] FIG. 10It depicts a side magnified perspective view of the equipment provided with the hook for anchoring ladders to cables.

[0030] FIG. 11It depicts a front perspective view of a ladder provided with the hook for anchoring ladders to cables supported on horizontal cables.

DETAILED DESCRIPTION OF THE INVENTION

[0031] In accordance with the above figures, the object of this invention, essentially consists of a main vertical frame (1) of prismatic rectangular geometry provided with a hinged hook (2) at its center, the rear end of which has an extension in which a through hole (3) is provided for attaching the rope (16).

[0032] The upper end of the main frame (1) has a longitudinal threaded shaft (4), provided with a handle (5) in the upper portion with a rectangular prismatic one-piece (6) coupled to said threaded shaft (4), which is attached to a rectangular opening in the upper portion of the main frame (1), with the one-piece (6) having on its rear face a concave surface (7) that tangentially embraces the bottom of the step.

[0033] At the lower end of the main frame (1), there is a rope grip (8) consisting laterally of an U-shaped support (9) which bears two semi-cylindrical elements (10) with grooved-like teeth positioned side by side, in which upper portions there is a rope limiting element (11) having at its center a half-round longitudinal recess (12) and two axes (13) which project perpendicularly downwardly in its rear portion and attach to holes of the same cross-section provided in the rear portion of the lower base (14) on which the semi-cylindrical elements (10) are mounted.

[0034] In the rope limiting element (11), through holes (15) matching the threaded holes are provided at the center of the semi-cylindrical elements (10), in which screws passing through the rope limiting element (11) are secured.

[0035] Said rope grip (8) locks the rope or ropes (16) which, in turn, lock the hook (2) by traction, preventing it from returning and releasing the cables (17) which support the service ladder (19). The rope (16) locking the hook (2) is threaded between the rope limiting element (11) and the semi-cylindrical elements (10) and is locked in the space between.

[0036] In the upper step (20), in which the upper portion of the main frame (1) is attached, and on each side of such main frame (1), two side latches (18) of toroidal geometry are provided.

[0037] Each of these side latches (18) is divided into two equal parts in semi-annular shapes and are installed in the ladder step (20) by means of screws and nuts.

[0038] The side latches (18) must be installed close to the main frame (1), so that it does not move sideways.

[0039] Incorporating the rope grip (8) and side latches (18) into the device provided with hook for anchoring ladders to cables increases safety substantially by addressing the drawbacks of such equipment.

[0040] It can be seen from the foregoing that the invention is characterized as a very useful equipment, presenting all the practical and functional qualities that fully justify the patent application for the Utility Model.