FR2543807A1 - CLASP FOR BAGS, BURSARIES AND THE LIKE AND METHOD OF MANUFACTURING A CALIPER USED FOR SUCH A CLASP - Google Patents

Abstract

CLASPS FOR BAGS, PURCHASES AND THE LIKE AND METHOD OF MANUFACTURING A CALIPER USED FOR SUCH A CLASP. IN THIS CLOSURE CONTAINING U-SHAPED STIRRUPS 3 CONNECTED BY ARTICULATIONS 3 AND WHOSE ELEMENTS FORMING BASE 4 HAVE A SNAPPING DEVICE 5 AND IN WHICH THE STIRCHES ARE MADE BY CUTTING AND BENDING FROM A SHEET PIECE, BRANCHES 2B OF THE CALIPERS ARE SHAPED BY BENDING FROM A STRAIGHT CUT SHEET PIECE WITH A BENDING LINE INCLINED AT APPROXIMATELY 45 FROM THE LONGITUDINAL AXIS OF THE STARTING PART, AND ONLY BASES 4 ARE CURVED UNDER THE SHAPED OF A U-PROFILE IN CROSS SECTION, OPEN ON ITS FRONT SIDES. APPLICATION ESPECIALLY TO CLOSING SYSTEMS FOR BAGS THAT CAN BE EASILY MOUNTED ON THESE LATEST.

Description

The invention relates to a type of device for

  closure or clasp for bags, purses and the like

  two calipers with a profile in

  of U, which are connected by articulations (eg

  a trunnion joint or an articulated joint

  tubular rivet) at the ends of their branches and

  in the region of their U-base there is a latching device or the like, the U-shaped stirrups being constituted by a single sheet metal part which is obtained by cutting from a sheet metal sheet in the form of a rectilinear sheet strip and is then curved so as to present an overall shape of

  U, whose profile of the cross section is also

  It is obvious that the branches in the form of

  of U and correspondingly the sheet metal part

  tiline have on their ends

  which are made in particular by shaping.

  In the case of the known type of said type (according to practice), the rectilinear sheet piece is shaped along its entire length so as to have a profile having an open U-shaped cross-section and the U-shaped legs are folded, with a large radius of curvature, from these rails

  It follows that in the region of

  U-shaped profile of the U-profile, the front faces are not open and it results in practical difficulties from the point of view of assembly during the connection

  clasp, purse or the like.

  In order to equip a clasp, having the

  described basic gure, a ruler or U-shaped base, the cross section of the U-shaped profile is open on the front sides, it has been proposed (German Patent No. 2,321,586), to cut the various stirrups U-shaped in one piece,

  with this U-shape, in a metal sheet of such

  so that the U-shaped branches form elements

  The disadvantage of this is that, when cutting such U-shaped sheet metal parts, there is necessarily a high degree of difficulty in forming the U-shaped bases. cutting waste, that is to say, a piece of sheet metal, which must be thrown away

  from sheet metal parts cut from

  firing a sheet of sheet metal in the form of sheet metal strips

  rectilinear, it is almost impossible to

  page or a cut without any loss If in the case of the embodiment described last and comprising

  frontally open bases and profiled with a

  I wanted to avoid a fall of cut, it would be necessary

  separately manufacture the U-shaped branches and

  its U-shape and then connect them by welding, which

  is expensive from the point of view of the manufacturing technique.

  The object of the invention is to provide a clasp of the type indicated, in which the profiled cross-section

  in U-shaped bases is opened frontally.

  This problem is solved according to the invention

  thanks to the fact that the U-shaped branches of the dif-

  the stirrups are curved from the

  cut sheet metal rectiligneau means of a folding, whose li-

  At an angle of about 45 or less with respect to the longitudinal axis of the undeformed sheet metal part, only the U-shaped base of the various stirrups is formed.

  is curved to provide a cross sectional profile

  the open on its front sides and having a U-shape In the case of the clasp according to the invention,

  when the U-shaped stirrups are manufactured in

  shot of a relatively thin sheet metal, shaped branches

  of U themselves can possess the mechanical resistance

  In this respect, a proposal of the invention is characterized by the fact that the U-shaped branches are folded around their longitudinal axis or around an axis parallel to the latter and are thus made at least in places in the form of double sheet branches In this respect another proposal of the invention consists in the fact that the U-shaped legs are stiffened by a longitudinal profile or by profiled flanges made by shaping. the double sheet metal branches can also be stiffened by profiling. In order to fold the U-shaped arms of the various brackets by folding from the straight sheet metal part, there are

  different possibilities If the edge or fold line

  ge extends over the entire width of the cut sheet metal part, the embodiment can be carried out in such a way that the fold lines are inserted into the open U-shaped profiled cross-section and

  consequently curved into a U shape.

  to an embodiment in which the bran-

  U-shaped doors are connected at the base level

  in the form of a U with a particular angular rigidity

  The stirrups, which are characterized in that the cut sheet metal part, which constitutes them, comprises in the region of the fold lines a cut-out which extends approximately on the half-width of the cut sheet metal part. and that the fold lines

  extend only in the cut-off area, possess

  sufficient angular stiffness, and this for a simplified folding compared to the embodiment described last In particular, it is possible to

  make the arrangement so that the part de-

  cut in sheet metal is folded first of 1800 in direc-

  the U-shaped base in the cut-out area, and that from these folded sections the branches

  U shape are bent under the effect of their folding.

  If in the case of this embodiment we want to

  Since the U-shaped arms are shaped like double tapered branches and thus stiffen them, the invention teaches that the U-shaped arms are formed as double tapered branches only in the region of the metal. outside of the associated cuts of

  the cut sheet metal part Generally speaking, we

  read the U-shaped branch by bending it with a

  U-shaped wire, outward in relation to the whole clasp The U-shaped arms have, at the level of

  of their free articulated extremities,

  culation emerged by twisting 900 out of the plane of the U-shaped branches.

  The present invention also relates to a

  assigned to manufacture the U-shaped stirrups of a clasp having the constitution described, in which case, starting

  of a sheet of metal sheet, a panel is cut

  This is achieved in accordance with the invention by firstly folding the U-shaped branches from the cut-out piece into straight sheet metal, and then forming the profiling. the U-shaped base so that it has a profile having a U-shaped cross section, and that the U-shaped branches are optionally doubled. The advantages obtained must be seen in the fact that, in the case of a clasp according to the invention,

  U-shaped branches can in any case be

  bricks from a straight sheet metal part, but that they have a U-shaped base with a

  U-shaped profile in cross-section, which is open

  No liaison work to make the connection

  U-shaped branches made separately at the U-shaped base are not necessary. Lepliage can be

  realized in a simple way from the point of view of

  manufacturing process and in a completely automatic way

  A particular advantage is that bends and fold lines act with stiffening and stabilizing action in the regions.

  in which particular constraints are

stirrups.

  Other features and benefits of the

  present invention will emerge from the description given

  hereinafter referenced to the accompanying drawings, on the

  which: Figure 1 shows a perspective view of the clasp according to the invention; Figure 2 represents, on a clearly

  enlarged in relation to the figurel and according to another

  tation, detail A from the object of Figure 1;

  FIG. 3 represents half of a piece de-

  cut in sheet metal with which the U-shaped stirrups of the clasp of Figure 1 are manufactured; Figure 4 shows the object of Figure 3 during its deformation to obtain a U-shaped stirrup; Figure 5 shows the object of Figure 4 after an additional phase of deformation;

  FIG. 6 represents, in accordance with FIG.

  re 3, a sheet metal part having another shape and ser-

  in the manufacture of U-shaped stirrups; FIG. 7 represents the head piece of

  the object of Figure 6, during its deformation to form

  sea a U-shaped stirrup; FIG. 8 represents the object of FIG. 7, after another deforming operating phase; and

  FIG. 9 represents an elevation view

of the object of Figure 8.

  The clasp shown in the figures is intended

  It has been used for bags, purses and the like.

  Its basic constitution includes two stirrups 1

  having a U-shaped outline and which are connected,

  calves of the end of their U-shaped branches, by means of articulations 3 made in the form of a

  journal hinge or the like

  carry a latching device 5 in the region of

their U-shaped stirrups 4.

  When looking at and comparing FIGS. 3 to 5 or 6 to 9, it can be seen that the U-shaped limbs 2 of the various stirrups 1 are curved by folding to

  from a straight sheet metal part The fold line

  ge 6 extends at an angle of about 450 or less

  relative to the longitudinal axis of the sheet metal part

  In addition, the arrangement is such that only the U-shaped base 4 of the different stirrups

  1 is curved so as to present a trans-

  U-shaped profile, which is therefore

  open on the front sides For this purpose, we refer to

  in particular in Figures 1 and 2 In the case of

  FIGS. 1 and 2 and FIGS.

  3 to 5, the U-shaped branches 2 are folded

  around their longitudinal axis and are therefore

  As illustrated in FIGS. 8 and 9, it is indicated that the shaped branches are

  U 2 can be stiffened by means of a profile

  longitudinal direction 7, profiled flanges not shown

  In the case of the embodiment of FIGS. 6 to 9, the folding lines 6 are inserted into the U-shaped profiled cross-section and thus also have a U shape.

  In the case of the embodiments of the

  1 and 2 as well as in the case of the form of

  FIGS. 3 to 5, the cut sheet metal parts

  different stirrups 1 have in the region

  bending means 6 a cutout 8 which extends approximately

  on the half-width of the sheet metal part The lines

  of folding 6 simply extend into the region of

  The preferred embodiment is shown in FIGS.

  in the invention, in which the sheet metal part

  first is folded from 1800 on the base in form

  U 4 in the cut-out region 8 (see FIGS.

  3 and 4) and from these folding sections 9, the U-shaped legs 2 are curved by bending, (FIG. 5). The U-shaped legs 2 are made here in the form of double sheet metal branches only.

  in the region lying-outside of the associated cut-outs

  8 of the cut sheet metal part.

  In FIGS. 1 and 2, it can be seen that the U-shaped base 4 of the various stirrups 1 is curved forming a U-shaped profile, outwards with respect to the whole clasp, which is advantageous for reasons of resistance. aesthetics and mounting technique On their ends, U-shaped branches 2 carry 7-

  hinge members 10 which are made of

  out of the plane of the U-shaped branches,

  by twisting 900 of the ends.

  If we look at comparing FIGS. 3 to 9, it can be seen that, from the point of view of the operative technique, the procedure is to first bend the U-shaped arms 2 from the sheet metal part. rectilinear and then we give the U-shaped base 4, a U-shaped cross-sectional shape and that we double

  possibly U-shaped branches 2.

Claims (8)

  1 Clasp for bags, purses and the like,   carrying two stirrups (1) having a profile in the form of   U, which are connected by articulations (3) to the end   their branch (2) and have in the region of their U-base (4) a detent device (5) or the like, the U-shaped stirrups (1) consisting of   by a single sheet metal part which is obtained by   from a sheet of sheet metal in the form of a ban-   of rectilinear sheet and is then curved so as to have a U-shaped assembly, whose profile of   the cross-section is also U-shaped,   characterized in that the U-shaped legs (2) of the various stirrups are bent from the straight cut sheet metal part by means of a bend, the line (6) of which is at an angle of about 45 or less by   relative to the longitudinal axis of the sheet metal part   formed, and that only the U-shaped base (4) of the   The stirrups (1) is bent to provide an open cross-sectional profile on its front sides and having a U shape.   Clasp according to claim 1, characterized   rised in that the U-shaped limbs (2) are   folded about their longitudinal axis or a pa-   to the latter and are therefore made under   the shape of double sheet metal branches.   3 Clasp according to any one of the   1 and 2, characterized in that the branches in   U shape (2) are stiffened by longitudinal profiling   tudinal (7) or by a profiled flange made by punching -   Clasp according to any one of the   1 to 3, characterized in that the fold lines (6) are inserted in the cross-section   open profile in U form and are also   A clasp according to any one of claims 1 to 3, characterized in that the cut sheet metal part of the different stirrups (1) comprises in the region of the folding lines (6) a cutout (8). which extends approximately half the width of the sheet metal part   cut and that the fold lines (6) extend only   in the cut area (8).   6 Clasp according to claim 6, characterized in that the cut sheet metal part of the various stirrups (1) is folded in the region of the cuts (8), first of 1800 on the U-shaped base (15). ) and that from these folding sections (9) the branches   form of U (2) are bent under the effect of their folding. ge.   Clasp according to any one of the claims   2, 5 and 6, characterized in that the branches in form   of U (2) are realized in the form of branches in the form of   the doubles only in the region located outside   associated cuts (8) of the cut sheet metal part.   Clasp according to any one of the claims   1 to 8, characterized in that the U-shaped base (4) of the various stirrups (1) is curved so as to have a U-shaped profile, outwards relative to to the whole clasp.   Clasp according to any one of the claims   1 to 8, characterized in that the shaped branches   of U_ (2) have at their ends   free abutments, articulation elements (10)   by twisting 900 out of the plane of the said branches into me of U (2).   Process for manufacturing shaped stirrups   U of a clasp according to any one of the claims   1 to 9, according to which from a sheet metal sheet   a rectilinear piece is cut and bent,   in that the branches are first folded into   U shape, from the cut sheet metal part   line and then perform the profiling of the   gets U-shaped so that she has a profile with a   U-shaped cross-section, and that there is a double   the U-shaped branches.