FR2462504A1 - PLASTIC CLAMP HAVING TWO BRANCHES CONNECTED BY A SPRING - Google Patents

Abstract

THE PLASTIC CLAMP INCLUDES TWO BRANCHES CONSTITUTING GRIPPING AND TIGHTENING PARTS. THESE BRANCHES ARE CONNECTED BY AN INTERMEDIATE PIECE FORMING A SPRING AND A SINGLE TENSIONER WITH THEM. THE INTERMEDIATE PART IS CONSTITUTED BY AN ANNULAR SPRING 8 HAVING THE CHARACTERISTICS OF ELASTICITY OF A SPRING. THE GRIPPERS 1, 2 ARE EQUIPPED WITH SUPPORTING PARTS OR BOSSES 5, 6; THESE BOSSES ARE DIRECTED TOWARDS ONE ANOTHER AND CONSTITUTE BEARING SUPPORT 7. THE GRIPPERS 1, 2 SWITCH AROUND THIS SUPPORT WHEN THEY ARE PRESSED TOWARDS THE OTHER.

Description

Plastic clamp with two arms connected by a spring

The subject of the invention is a pliers made of plastic material, comprising two branches acting as gripping and tightening parts and connected by an inter-

medial forming a spring and in one piece with them.

  In the known clamps of the above type, the two plastic branches are held together by a steel spring with two end tabs. To manufacture such clamps, three elementary parts and several steps are required. The manufacture of this mass consumption article is consequently made expensive. In addition the springs

  steel are subject to corrosion and escape easily.

  Plastic clips are also already known and, separately, staples which can be placed between the gripping parts. These pliers also require several manufacturing steps. The elastic clip gets tired due to its very light construction and this defect can hardly be eliminated by the use of an elastic plastic, therefore expensive, and consequently these pliers are also produced in several stages of work at a price.

  relatively high and only have a short lifespan.

  We still know staples or pliers

plastic in the shape of a stirrup and crosspieces, simple type.

  These pliers are very inexpensive, because they are made in one piece; but they have only a weak clamping force and above all, given the absence of gripping parts, they are complicated to actuate and require the two hands. Given their poor handling, they

  could not reach wide circulation.

  The present invention aims to provide a clamp which is inexpensive and rational to manufacture, which is easy to use and which ensures a satisfactory and lasting clamping force without the use of a metal spring, a clamp which can be used, for example, for hanging laundry or

similar products.

  The gripper according to the invention is characterized in particular in that the central part or part is produced in the form of an annular spring and in that the gripping parts are provided with support bosses directed towards each other and constituting a bearing, said gripping parts being provided so as to be able to tilt around the bearing at least when these parts are pressed towards one another. - This constitution of the clamp makes that, surprisingly simple, the support bosses come into contact when the clamp is opened, so when the gripping parts are pressed towards each other, and constitute a tilting support around which the two branches rotate

when you increase the pressure.

  This prevents the ring spring from being crushed when the clamp is opened, so that there can be no reduction in the elasticity effect by

  mechanical crushing of the plastic spring.

Thanks to this low stress on the ring spring, it is also possible to be satisfied with a cheap plastic material for the manufacture of the object of the invention. Hard plastics, not subject to creep, are particularly suitable for this. We can therefore achieve a long service life for inexpensive manufacturing. The gripper in one piece selbn the invention can be produced fully automatically without intervention

manual until completion.

The elastic ring spring between the two arms

  exerts the desired clamping force by corresponding bending

laying at the opening of the arms, so that the clamping force naturally depends on the relative stiffness of the ring spring and which can be produced in a simple manner

  pliers having a strong or weak tension at will.

The present invention will be better understood on

  reading of the description which follows of a particular mode of

  realization, given by way of nonlimiting example. The

  description refers to the accompanying drawing, in

  which: Figures 1 and 2 schematically show the clamp,

respectively in elevation and in side view.

  FIG. 3 is a section of the clamp of FIG. 1,

  along line III-III of Figure 1.

  The plastic clip shown in the figures can be used as a clothespin. This clamp has two branches which incorporate the gripping parts 1,2 and the clamping parts 3, 4. The gripping parts 1, 2 are provided with support bosses 5, 6 which automatically take support when a closing pressure is exerted and constitute a rotation support or bearing 7. This avoids the crushing of a ring spring 8 which connects one to the other in an elastic manner and in the manner of a hinge the two branches, during the reconciliation by

  pressure of the gripping parts 1, 2.

  The invention is obviously not to be read in the party mode.

  culier of achievement that was. described by way of example; it should be understood that the scope of this patent extends to any

  variant remaining within the framework of equivalences.

R-E V E'N D I C A'T I O NS

  1. Pliers made of plastic, comprising two branches acting as gripping and tightening parts and connected by an intermediate part forming a spring and integral with them, characterized in that the pin

  intermediate consists of a spring anrn-

laire (8) and in that the gripping parts are provided with support bosses (5, 6) directed towards each other and constituting a bearing (7), said gripping parts! oM (1, 2 ) being designed to be able to tilt around the nivmenet (7), at least when these parts are pressed

towards the other.

  2. Pliers according to claim 1, characteristic that the intermediate piece forming a spring has the shape

  illustrated in Figure 1 of the drawing.