FR2745740A1 - Pliers for producing twisted joints in pairs of wires - Google Patents

Abstract

The pliers are constructed with three handles and three jaws. The two side branches (1) are the moving arms and are connected to the two mobile jaws (5), which act on one each of the two wires to be joined. The fixed jaw (4) is connected to a fixed handle (2). Both jaws are designed, with bosses, grooves, striations, etc., to position and hold the wires to be twisted. Notches (6) formed in the jaws enable the cutting of the wires, either simultaneously for both ends, or individually, after the completion of the twisting operation. The holes (7) in the ends of the handles allow the ends of the wires, left after the cutting operation to be curved into the joint.

Description

 The present invention relates to a manual clamp for tying the ends of the metallic wires by twisting them two by two.

 The knotting-twisting of metal wires is traditionally carried out using a so-called "universal" pliers, which is not suitable. For example, despite the tightening, one of the threads often slides and therefore the other thread is twisted on itself and breaks. Or one remains straight and the other wraps around, without the desired locking. There are also brake pliers, precise, powerful and incubating, which are used in aeronautics to twist only small diameter wires in very stubborn metals.

 But these tools do not meet the usual demand for good work with various diameters and metals.

 The clamp according to the invention overcomes the drawbacks. Pu 1 ieu of two handles (and two jaws), it has indeed according to a first characteristic, three handles (and three jaws). The three branches are independent, only connected (like other clamps) by an axis (for example a screw). The jaw of the central branch is wide. Against this the wires would be clamped by the other two jaws. One hand will squeeze the three handles (naturally, to turn this clamp then, it is better with both hands).

 According to particular modes of real isat ion: - the jaws would have particularities (boss to spread the wires, grooves to position them, striations to hold them strongly, adaptability to different diameters, etc ...).

- shear notches at the bottom of the spout would cut either one thread at a time, or the two ends of the spin simultaneously.

- inserts (with different hardnesses) could ensure functions: cutting, rai i onge of the handles and c.

- a lock keeping the wires tight is possible.

- holes would be used to bend the ends of the wires.

- this does not prevent other uses.

The accompanying drawings illustrate the invention:
Figure 1 shows, in prof it, the clamp according to the invention, open jaws.

FIG. 2 represents, from the front, the pliers according to the invention, jaws open, with, next to it, a result obtained.

 With reference to these drawings, the clamp has two lateral branches (i) opposite to a central branch (2), the three only connected by one common axis (3). For twisting (by rotation of the clamp) the jaws (5) of the lateral branches (i) will clamp the wires against the large jaw (4) of the central branch (2). Possibilities: separation boss and grooves on jaw (4), grooves in jaws (5).

 For strapping, for example, the user would tighten the end of a wire with one of the side jaws (5) on the central jaw (4), pass the wire, then tighten the other end with the other side jaw (5) and would make the twist ensuring tension and locking, by turning the clamp.

 Then the two ends would be cut simultaneously by the notches of cisai 1 LEMENT (6) in the bottom of the spout, for example.

The shearing could also be done for one thread at a time.

 Then, the ends could be bent using the handles drilled in (7) as bending keys.

 Straightening of wire, nails (etc) can also be done by tightening them in the jaws parallel to the axis (3).

 In one embodiment, the axis (3) could be between a screw screwed in a lateral branch. The operation must be free of play, the screw blocked (for example) in the thread (but possibly removable and re-tightenable).

 It is useless to nest the branches at the level of the art icon, as it is done for pincec; with two branches, mainly for ergonomic reasons. The three handles of this clamp ensure a good grip, the simple shapes of the branches will be less costly to machine.

 By way of nonlimiting example, the clamp will have dimensions of around 25 cm for the total length.

 The pliers according to the invention is particularly intended for knotting and twisting metal wires.

Claims (4)

 1) Pliers for knotting-twisting the metal wires, characterized in that it has three handles and three jaws. That is to say two lateral branches (1) not ground idaries, whose jaws (5) will pinch a wire each on the wide jaw (4) of the third branch (2).  S) Pliers according to claim 1 characterized in that the jaws (4) and (5) would be adapted, by boss, grooves, grooves (etc ...) to the positioning and the holding of the wires of different diameters for twisting .  3) Pliers according to claim 1 or claim 2 characterized in that notches (6) in the branches (with or without inserts) allow the chisel 1 lernent son. Whether simultaneously for the ends of the two wires at the end of twisting, or for the shearing of a single wire.  4) Pliers according to Quelcor, that of the preceding claims characterized in that holes (7) in the handles allow to bend the ends of the son which protrude.  5) Pliers according to any one of the preceding claims, characterized in that the jaws (4) and (5) are also suitable for positioning and holding the metal wires, nails (etc) of different dimensions for their straightening.