FR2461557A1 - MANUAL PUNCHING TOOL FOR KEY HOUSING - Google Patents

Abstract

HAND TOOL FOR CUTTING KEY HOLES CONTAINING A DIE 20 CROSSED BY A PUNCH PRESENTING PROJECTING BLADES 25 IN WHICH ARE SHAPED HOLLOWED CUT PARTS 24. THE PUNCH IS MOVED WITH RESPECT TO THE DIE BY MEANS OF A 13 ARTICULATED AXLE HANDLES 11 ALSO CONNECTED TO THE PUNCH BY CONNECTING RODS 14.

Description

246,1557

  A splitting tool of the kind described in US Pat. No. 3,265,545 has a movable die which cuts a slot in metal, plastic,

etc. The cited patent indicates that the force used to displace

  cer the die to cut the slit is in a 1: 1 ratio. Furthermore, the tool described by US Pat. No. 4,111,022

is a manual crimping tool using two levers to

place the jaws. Thus, the present invention relates to

  do not use a tool to punch the keyholes.

The subject of the invention is a manual actuated tool

  ment for cutting uniform keyholes in metal or non-ferrous material and its design allows for a more or less wide keyhole.

  In accordance with the invention, the hand-operated tool

It also includes: (a) a pair of handles pivotally connected by a first pivot,

(b) a punch having a hollowed out light connected to the first

mier pivot, (c) a matrix having a longitudinal bore and which is connected to the first pivot by means of a hole normal to the longitudinal bore,

(d) connecting rods having a hinged end at each

  one of the handles and articulated by their other end

mite the punch so that the movement of the handles causes a longitudinal movement of the punch relative to

port to the matrix.

  Various other features of the invention res-

  emerge from the detailed description which follows,

An embodiment of the invention is shown, by way of nonlimiting example, in the accompanying drawing,

  Fig. 1 is a side view of the tool.

  Fig. 2 is a top view of the tool,

Fig. 3 is a fragmentary side view of the som-

puts some tool.

Fig. 4 is a side view in section of the tool.

Fig. 5 less the matrix, fig, 6 is a. yue from above of the matrix of fig, 6, fig, 7 is a side view of the punch, fig. 8 is a front view of the punch of the freeze 7. FIG. 9 is a view. from above the punch of the

fig. 6.

  Fig. 10 is a section of the punch and of the die showing the relative location of the recesses and their respective use, FIG. 1 shows a hand tool 10 comprising two

  handles 11 designed to be pivoted

  turn of a pivot 13 at position 12 indicated in dots-

  lé, by means of a pivot 13, Several rods 14 are pivotally connected by one end to the punch 16 by means of pins 15 and pivot 17, It is therefore obvious that a pivoting movement of the handles outward around the pivot 13 and a pivoting movement of the connecting rods 14 cause the punch 16 to move upwards thanks to a light 18 which provides guidance for the sliding movement of the punch 16 within limits determined by the length of this recess 18, A die 20 is located around the punch 16 and

  connected to the latter by the pivot 13 passing through a hole 21.

  In other words, a longitudinal bore 19 of the matrix

  is aligned with the light 18 of the punch 16 and cet.ma.

  is connected to the handles 11 by the pivot 13, The

  movement of the handles 11 causes movement of the poin-

  lesson 16 upwards while the matrix 20 remains immov bile. The punch 16 has at one end a bore 23 intended to allow it to pivotally connect with

  the rods 14 by means of an axis 17, the end su-

of the punch 16 comprises two blades 25 and 25a if-

  killed along its longitudinal axis and which are sail-

diametrically opposite lees with respect to each other,

In other words, the projections are 1800 from each other.

However, it is within the competence of a person skilled in the art to adapt the projections made by the blades to angular positions other than the diametrically opposite position,

Each of the projections formed by the blades 25 and 25a pre-

  feels a respective recess 24, 26. The matrix 20 which includes the bore 19 has therein longitudinal elements 22 and 27 aligned with the projections of the blades 25 and 25a of the punch 16, It appears in FIG. 6 that the recesses 22 and 27 are of different size but correspond to the

  size of the projections of the blades 25 and 25a. As my-

  be the freeze 10, which shows a section of the material

  to cut, bring it against the punch and put it in

pledge in the recess 26. A movement of the handles 11 inwards, or towards one another, causes the punch 16 to move downwards in the position of FIG. 4 and thus moving the blade 25 which ensures the uncut "

page of the material of the piece.

  In operation, the operator moves the handles 11 outward to bring the blades 25 and 25a above the die 20 and the tool in a position where the recess of each blade 25 or 25a stops. against the

material to be removed, Then the operator tightens the

  or move them towards each other, so that the blade 25 or 25a removes the metal between the upper part

of the matrix 20 and one or other of the projections of the

my 25 or 25a.

  It is understood that the invention is not limited to the embodiments shown but also includes all

analogous designs and variants.

Claims (3)

1 - Manual tool to punch keyholes vette, comprising a movable matrix displaceable relative to a part to be punched and characterized in that it comprises: a) a pair of handles (11) pivotally connected by a first pivot (13), b) a punch ( 16) having a hollowed out light (18) connected to the first pivot, c) a matrix (20) having a longitudinal bore (19) and which is connected to the first pivot by means of a hole (21) normal to the longitudinal bore , d) connecting rods (14) having one end hinged to   each of the handles and articulated by their other end mite with the punch, so that the movement of the handles causes a longitudinal movement of the punch relative to the die, 2 - Tool according to claim 1, characterized in that the punch (16) has several blades (25, 25a)   protruding and extending parallel to its long axis   gitudinal, each of said blades having a visible part   dée (24, 26) at an intermediate point of its length and the matrix (20) having longitudinal recesses (22, 27) aligned with said blades.   3 - Tool according to one of claims 1 and 2, ca- characterized in that the punch blades have different dimensions and in that the recesses of the die are   designed to match the punch blades.   4 - Tool according to one of claims 1 to 3, ca- characterized in that the hollowed-out parts of each of the blades   are aligned with the longitudinal recesses of the matrix   this so that the longitudinal movement of the punch has the effect of displacing the knives and said hollowed parts below the part of the upper edges of the die so as to cut out the material of a piece   this book introduced in said hollowed out part. JC / ML