FR2491742A1 - MACHINE FOR THE AUTOMATIC LAYING OF SLIDERS ON CLOSURE STRIPS WITH COUPLING PROFILES - Google Patents

Abstract

MACHINE FOR AUTOMATIC LAYING OF SLIDERS ON CLOSING STRIPS WITH COUPLING PROFILES. THE SLIDERS 11 ARE TAKEN FOLLOWING ONE OF THE OTHERS IN RESPECTIVE ACCOMMODATIONS 14 HOUSEHOLDS AT THE PERIPHERY OF A ROTOR 9 DRIVEN IN ROTATION BY A STEP-BY-STEP MOTOR. BETWEEN THE PERIPHERY OF THE ROTOR AND AN ARC STATOR 12 IS PROVIDED A SPACE GOING BY GRADUALLY DECREASING IN THE DIRECTION OF ROTATION 15 OF THE ROTOR 9. ON THE CLOSING STRIP 2, FOLLOWING WHICH THEY ELASTICALLY REFER TO. SUCH A MACHINE MAKES A SIGNIFICANT INCREASE IN THE LAYING RATE.

Description

Machine for automatically placing sliders on strips

  closing with coupling profiles.

  The present invention relates to a machine for the automatic installation of sliders on closure strips with coupling profiles, this machine comprising means for feeding the sliders one after the other and in a determined position, guide means of a pair of

  cooperating closure strips along an essential path-

  rectilinear, and means to open the sliders and

introduce on the strips.

  The invention relates more particularly to said

  means that are provided to open the sliders and intro

duire on the closure strips.

  A machine is currently known in which this operation is carried out by jaws with complex movements. The principle will be described below, with reference to the attached drawing. This machine is very complicated, both in terms of design and in terms of its settings, it does not work well enough, and the laying rates are limited to around thirty-five sliders placed per minute, which annoyingly limits the maximum speed at which the tapes run; indeed, the current welders,

  for fixing the strips on bags of synthetic material

  that or other supports, have their limited working speed of

  this fact, and production is much lower than it could

  could be without this subjection of placing sliders.

  The aim of the present invention is to remedy these drawbacks and to create a new, simpler machine,

  more reliable, and allowing much higher installation rates

  res at current rates, which will give their

  full efficiency at welders, and thereby increase production

  tion. For this purpose, a machine for fitting cursors of the type

  mentioned at the beginning is, according to the invention, characteristic

  laughed at in that said means for opening the sliders and inserting them on the strips essentially comprise, from a

  apart from a rotor coupled to motor means enabling the

  drag in rotation step by step, this rotor being provided at its peri

  A series of housings opening in a radial direction and each capable of receiving, in turn, a cursor at a point where the successive cursors arrive, and on the other hand a stator, extending along a part of the periphery of said rotor, essentially between said location of arrival of the sliders and said path of the closing closing bands, said rotor housings having, towards the terminal end of the stator, a path practically tangent to said path, said stator being furthermore eccentric with respect to the aurotor, and shaped so that it has internally, that is to say facing the rotor, a bearing surface for the ends of the insertion face of the sliders, said surface, considered in

  the direction of rotation of the rotor, being at a distance from the bottom of the

  said housing which is gradually decreasing and in that a system of ramps or the like, provided on the rotor and / or

  on the stator, is arranged to cause the opening of the cur-

  sisters during displacement that, driven by their res-

  pectif, they perform towards the closing bands, said

  sliders which can then, due to their elasticity, refer to

  sea on said strips, enclosing said delivery profiles

  when they leave their home, then being

  driven by the moving bands.

  The operation of a machine thus produced will be seen

in more detail later.

  When the cursors, as known, are of a type

  comprising on their bottom two outer cheeks which, when

  are pinched, cause the cursor to open, said system

  advantage of ramps can advantageously and simply be

  formed by a "V" conformation of the bottom of the housing of the ro-

  tor, along which the edges of the

  said cheeks when the cursor is gradually pressed towards the bottom of its housing by the action of said bearing surface of the stator, which causes said cursor to open while

  it moves to the bands.

  We could too. provide, as a variant, that said sliders are of a type comprising opposite their bottom, namely on the ends of their introduction face,

  one or two pairs of ears, and that, in such a case, for the ob-

  With the same effect as above, said ramp system comprises, in said stator bearing surface, grooves or

  analogs, receiving said ears and spreading them apart

  to open the cursor while it is moving

2 491742

this towards the bands.

  In the accompanying drawing - Figures 1 to 4 schematically represent, in their different operating positions, the jaws of a known laying machine, of the type mentioned at the start;

  - Figures 5 and 6 show schematically, respectively-

  ment in plan and in cross section, the rotor and the stator of a machine established in accordance with the invention;

  - Figures 7a and 7b show an ear slider used

  readable in an alternative embodiment of the machine; and

  - Figure 8 shows a pre-opened metal cursor.

  The known machine has been shown, in Figures 1 to 4, as adapted to engage on a variety of closure strips

  1, with coupling profiles 2, known sliders of the type

  bearing on their bottom 3 outer cheeks 4.

  What we called above "the introductory face-

  cursors "has been referenced in 5; it is indeed

  of the face, opposite the bottom 3, by which the sliders are

  They are introduced on the pair of strips 1. The sliders are made of an appropriate synthetic material, giving them a certain elasticity. The sliders are brought one by one to the machine by any suitable feeding means (vibrating bowl,

  slides), capable of giving them a well-defined orientation

  born. They are thus introduced between the two jaws 6 of the

  machine, which can pivot around axes 7 (Figure 1).

  Appropriate control means then pivot the two

  jaws, including the heels 8, by pinching the cheeks 4, pro-

  then evoke the opening of the cursor, by elastic folding the

  along the center line of its bottom 3 (Figure 2); parade-

  strips 1 being stopped, pliers (not shown)

  enclose the two closure strips 1 on each side of the em-

  placement where the cursor is to be entered. Jaws 6

  open then advance towards the bands (figure 3) for the intro-

  duction of the cursor, then move away from it to release it (figure 4). The aforementioned clamps release the bands, which can then be put back into running movement, then the jaws 6 return to their initial position, after which the cycle

  can be repeated as described above.

  We see that such a machine is quite complicated to operate, the movements of the jaws being complex

249 1742

  (rotation, translation, spacing, approximation), and that this operation is essentially discontinuous. This explains the low rates obtained and the relative frequency of

  breakdowns or need for adjustments.

  We will now describe a machine according to the invention, and more precisely the means which, on this machine, are provided for opening and introducing the sliders on

  the closure strips, since the other means an-

  machine attachments (slider feed, ban guiding

  , etc.) can be conventional and will not require e-

be described.

  In FIGS. 5 and 6, the rotor mentioned above is referenced at 9 and provided with housings 10 at its periphery

  opening in the radial direction and suitable for receiving the cur-

  sors (globally referenced eni11). The rotor 9 can be

  dragged step by step, for example by means of a ratchet wheel (not shown) actuated itself by a jack controlled in synchronism with the supply of successive sliders

  11, as well as with the welding rate.

  Along a part of the periphery of the rotor 9,

  tre the location of the cursors ll (lower part of FIG. 5) and the path followed by the closure strips 1, extends an arcuate stator 12. This stator has a surface opposite the rotor 9 support 13 and it is eccentric with respect to the rotor so that the space between this surface 13 and the bottom 14 of the housings 10 goes gradually decreasing

  in the direction of rotation of the rotor (arrow 15).

  The bottom 14 of the housings has a particular shape to constitute what has been called above "the system of ramps or the like"; it has, as visible in Figure 6, a profile

  doubly "V" shaped, with two pairs of ramps 16 and 17, separated

rees by a bearing 18.

  When a cursor 11 is brought into the position you want to

  read, - at the arrival location, it is pushed, by a pusher 19 mounted for example on a cylinder rod 20, into the housing 14 which faces it, through a guide opening 21 of the

  stator 12, the rotor then being stopped.

  The rotor then being put into rctation, the occupied housing 14 drives the cursor 11 in the direction of the arrow 15 and the edges of the part of the cursor which remains outside the rotor, that is to say the edges of what we called above "the introduction face of the sliders" are pressed against the bearing surface 13 of the stator 12. Because the space formed between this surface 13 and the bottom 14 of the housing 10 gradually decreases during rotation in the direction of the arrow, the edges of the outer cheeks of the cursor are caused to slide along the ramps 17 of the bottom 14 of the housing, which

  causes the progressive opening of the cursor, until the position

  tion shown at the top of Figure 6.

  It can then be seen that the lateral edges of the bottom 3 of the slider 11, which extend outside the cheeks 4, are supported on the abovementioned bearings 18, while the two tabs

  side of the cursor come to rest on the ramps 16.

  When the open cursor thus reaches the

  i5 closure strips 1, the fact that it leaves the housing cor-

  respondent 10 then allows it to close resiliently

  on the bands, enclosing the coupling profiles 2.

  It should be noted that in order not to overload the drawing, the cursor has not been shown in the housing 10 in FIG. 5; it has been shown, respectively in the closed position and in the open position, only at the bottom and at the

upper part of figure 6.

  When the laying operation which has just been described

  has been performed, a new cycle can start again, the

  ment 10 diametrically opposite to the one who has just left

  by the cursor 11 which can in turn be supplied with the cursor.

  We see that a machine according to the invention is of a

  simplified constitution and also very simple and practical operation

  tick continuously; in particular, it requires no adjustment and it has been found that it is also very reliable to operate. The movement followed by the cursor between its entry into the rotor and its introduction on the closure strips being circular, there is no need to go back, which leads to a

  saves time and makes it possible to obtain laying speeds of the gold

from one hundred cursors per minute.

  We can thus significantly increase the speed of

  threading of the closing strips and concomitantly the speed

  operation of the welders with ultimately a gain in pro-

very important duction.

2491742-

  A simplification of the machine results from the fact

  no clamp gripping the closure strips is required

  re and that these can therefore continue to scroll for a

  when placing the cursor; All that is required is standard guide means.

  sic for the closure strips, with means of setting

any tension.

  Figures 7a and 7b show as a

  laughing pn other type of cursor, referenced in 22, and for

  Also to be installed by a machine in accordance with the

vention.

  Instead of having 4 cheeks extending from

  shot from their bottom 3, these sliders have been provided with a pair of ears 23, one provided at one end of the slider on one of its lateral legs and the other on the other leg but at the opposite end. These ears can thus be guided by grooves or by an appropriate ramp provided on the surface 13 of the stator, in such a way that they:

  are gradually moved away from each other to provo-

  quer the opening of the cursor 22 during its movement in the direction of the arrow 15. The operation of the machine would

  therefore essentially the same as that just described.

  The machine could also make it possible to carry out the automatic installation, no longer of sliders in elastic synthetic material, but of metal sliders 24 pre-opened mold or

stamped (figure 8).

  The machine would then be modified to no longer provo-

  quer a progressive opening of the cursor but of course to cause the progressive closing of the cursor until it comes, at the terminal end of the stator 12, to grip the

  closure strips 1 and their coupling profile 2.

  As it goes without saying, and as it results from elsewhere

  In addition to the above, the invention is in no way limited to those of its modes of application and embodiments which have been more particularly envisaged; on the contrary, it embraces

all variants.

249 1742

Claims (4)

  1. Machine for the automatic installation of sliders on   closing strips with coupling profiles, this ma-   china comprising means for bringing the sliders one after the other and in a determined position, means for guiding a pair of cooperating closure strips along an essentially rectilinear path, and means for opening the sliders and the introduce on the bands, characterized in that said means for opening the sliders and introducing them on the bands essentially comprise, on the one hand, a rotor   coupled to motor means allowing it to be driven in ro-   step by step, this rotor being provided at its periphery with a housing   elements opening in the radial direction and able to receive each,   in turn, a cursor, in a location where the cur-   successive sors, and on the other hand a stator, extending along a part of the periphery of said rotor, essentially between   said arrival location of the cursors and said path of the banners   closing in running, said rotor housings having, towards the terminal end of the stator, a path practically tangent to said path, said stator being further off-centered by   relation to the rotor, and shaped so that it presents in-   posteriorly, that is to say facing the rotor, a bearing surface   for the ends of the insertion face of the sliders, the-   said surface, considered in the direction of rotation of the rotor, é-   both at a distance from the bottom of said housing which goes in dimi-   gradually clouding, and in that a system of ramps or ana-   logues, provided on the rotor and / or on the stator, is arranged for   provoking the opening of the sliders when moving that,   dragged by their respective housings, they carry out towards the closure bands, said sliders then being able,   of their elasticity, close over the said strips, in the case of   mant said coupling profiles, when they leave   their housing, being then entrained by the bands in defi-   lement. 2. Machine according to claim L characterized in that, said sliders being of a type having on their bottom two outer cheeks which, when pinched, cause the opening of the slider, said ramp system consists of a conformation in a "V" shape from the bottom of the rotor housings, along which the edges of said cheeks can thus slide when the cursor is gradually pressed towards the bottom of its housing by the action of said stator bearing surface, which causes opening said cursor   while this one is moving towards the bands.   3. Machine according to claim 1, characterized in that said sliders are of a type comprising opposite   from their bottom, namely on the ends of their face of in-   troduction, one or two pairs of ears and in that said system   me of ramps comprises, in said bearing surface of the stator, grooves or the like, receiving said ears and progressively moving them apart, to open the cursor while   it moves to the bands.   4. Machine for automatic installation of sliders on   closure strips with coupling profiles, this ma-   china comprising means for bringing the sliders one after the other and in a determined position, means for guiding a pair of cooperating closing strips along an essentially rectilinear path, and means for closing   the cursors and insert them on the bands, these cursors é-   both pre-opened, characterized in that said means for closing   sea the cursors and introduce them on the bands include   essentially, on the one hand, a rotor coupled to means   teurs allowing it to be driven in rotation step by step, this rotor being provided at its periphery with housings opening in the radial direction and capable of each receiving, in turn, a cursor, at a location for arrival of the cursors successive, and on the other hand a stator, extending along a part of the periphery of said rotor, essentially between said arrival location   sliders and said path of the closing closure strips   said rotor housings having, towards the terminating end   nal of the stator, a path practically tangent to said path, said stator being further off-center with respect to the rotor, and   shaped so that it presents internally, that is   say facing the rotor, a bearing surface for the ends of the slider insertion face, said surface, considered in the direction of rotation of the rotor, being at a distance from the bottom of said housings which is gradually decreasing, and by what a ramp system or the like, provided on the rotor and / or   on the stator, is arranged to cause the closing of the cur-   sisters during the trip that, driven by their accommodation -res-   pectif, they carry out towards the closing bands, said sliders being thus closed on said bands, by enclosing said coupling profiles, at the moment when they leave their   housing, then being driven, by the moving bands.