WO1979000555A1

WO1979000555A1 - Hand pliers with detachable jaws

Info

Publication number: WO1979000555A1
Application number: PCT/FR1979/000002
Authority: WO
Inventors: P Auzou
Original assignee: P Auzou
Priority date: 1978-01-27
Filing date: 1979-01-12
Publication date: 1979-08-23
Also published as: DE2964457D1; FR2415520B1; EP0009485A1; EP0009485B1; FR2415520A1

Abstract

Device allowing to form hand pliers which give the possibility to seize and hold between the jaws multiple elements such as screws, units, pins, small parts, etc. These pliers are made up with two levers (1 and 2), engaging one into the other and pivoting on an axis (4). A spring (6) between the handles (3) exerts a pressure on the jaws. This pressure allows to hold multiple elements between the jaws. Detachable jaws of different sizes and shapes can be locked onto the jaws of the pliers, thereby increasing considerably the possibilities of use of these pliers. These pliers used alone or with its detachable jaws have therefore the possibility to seize, hold, insert, separate, etc. elements such as screws, nuts, pins circlips, small parts used in mechanical engineering, electricity, electronics, etc.

Description

MANUAL PLIERS WITH REMOVABLE JAWS

The present invention relates to the use of different parts and elements, to constitute a manual clamp used for multiple uses.

All the manual devices currently known for holding small elements such as: points, screw-nuts, washers etc, are pliers of all shapes and all formats, often specially designed for certain jobs (especially for working in inaccessible places) . It was therefore regrettable that there was no clamp that could be adapted to facilitate the execution of multiple jobs. The practical advantage according to the invention is to have with a single pliers, the possibility of carrying out multiple works, in particular meticulous and difficult to access.

Indeed, the design of this tool is such that it allows the pliers themselves to grasp and hold small elements, in very good conditions and in places that are not easily accessible, but their possibilities of use are considerably increased. by adding (with a simple gesture) on the jaws thereof, other jaws, studied for particularly difficult work. The invention resides in the characteristics of combinations of elements and arrangements of parts which are described by way of examples below, with reference to the accompanying drawings. Figure 1 shows the clamp in elevation, Figure 2 the removable jaw in elevation, Figure 3 the clamp in section along AB, Figure 4 the removable jaw in section along CD.

This clamp consists of two branches or levers 1 and 2. Each lever has three parts: at one end of the jaws tapered in the center the metal plate constituting the assembly is cut according to a determined profile, and folded in the shape of U. L the other end forms a part of the handle, this part is coated with rigid plastic, to form the complete handle (3).

In the central part of the lever (1), is housed the central part of the lever (2). The pivot axis (4) crosses the two levers, the nut (5) is screwed onto the threaded part of the axis (4) and holds the assembly together, thus the two levers have the ability to rotate, including the jaws of the clamp to move apart or move closer.

Wrapped around the pivot 4, we have a spiral spring 6, the ends of the branches of which press on the inside of the handles 3. This pressure makes it possible to maintain small jaws at the end of the jaws items such as spikes, nuts, screws, small parts, etc. These elements are released by pressing the fingers of the hand on the two handles (3). To allow extremely rapid fixing of the detachable jaws (10) on the jaws of the pliers, these have the following characteristics: at the base of the jaws of the pliers is a deep-drawing, giving on the other face the bosses (8). In the profile of the jaw, on its outer part, a recess (9) is formed forming a stop. On the other hand, the removable jaws (10) consist of a metal strip, the cutout of which presents the tabs 11. 12. 13. These tabs are folded in a U shape so as to form a slide whose width is substantially equal to the thickness of the clamp jaws. The cutting of the metal wave has at its base a tapered part, at its end there is a deep-drawing (14), of the same importance as that executed on the jaws of the pliers.

The other end of the removable jaw can have different shapes, different lengths, different notches, be folded at different angles, be magnetic etc.

The removable jaws are fixed on the jaws of the pliers, by engaging the tabs 11-12-13 on them and sliding them from the tip towards the base, the tab (13) coming into abutment on the recess (9 ). On the other hand, since the jaws of the pliers are tapered, the removable jaws are perfectly held, since they come to jam by jamming towards the base of the jaws of the pliers.

The locking of the assembly is ensured by the engagement of the casing (8) in the hollow (14) of the removable jaw; it is the flexibility of the metal of the tapered part which ensures this locking. The removable jaws are separated from the jaws by the gesture reverse of the fixing, it is air by exerting a traction on the two parts.

The object of the invention of this clamp and its removable jaws includes the possibility of grasping, maintaining, presenting, accommodating, inserting, spreading, etc., elements such as: screw-nuts-rods-circlips-small parts used for repairs , manufacturing, maintenance of equipment and materials: mechanical, electrical, telephone, electronic, etc. These works can be carried out in very difficult, accessible places.

Claims

1 - Device for constituting a manual clamp with removable jaws, for multiple uses and uses; of the type in which the jaws of the clamp, have the possibility of grasping and holding small elements and are formed so as to receive removable jaws which are fixed on the jaws of the clamp with lateral guidance and longitudinal locking.

Characterized in that, on the one hand, the lateral guidance is obtained, from lugs (11) (12) (13) formed by cutouts of the metal strip constituting each removable jaw and folded- in U shape, so as to form a slide intended to be engaged by sliding on the jaw of the clamp from its tip to its base. This feature allows blocking of the removable jaw by wedging, since the removable jaw slides over a tapered part. On the other hand, the longitudinal abutment is obtained from a recess (9) of the jaw, on which abuts the tab (13) of the corresponding removable jaw. Regarding the longitudinal locking, it is obtained from a tapered and flexible part, located at the base of the removable jaw and carrying at its end a stamping (14) intended to be applied to a corresponding stamping (8) formed at the base of the jaws of the clamp, and thereby ensuring the locking by the flexibility of this tapered part. 3 - Device according to claim 1 characterized in that the stamping of the removable jaws is a hollow stamping (14) coming to be applied on the boss (8) of the stamping carried out on the jaws of the pliers.

3 - Device according to claim é characterized in that the stamping of the removable jaws, perhaps a stamping in relief (boss format) coming to be housed in the hollow of the stamping of the removable jaw.