FR2633495A1 - Method and machine for manufacturing shoes with an upper, particularly of the moccasin type: reactivation of the rear counter (stiffener), moistening of the toe of the upper - Google Patents

Abstract

Method and machine for manufacturing shoes with an upper, particularly of the moccasin type, in particular for the reactivation of the rear counter (stiffener) of the upper and moistening of the toe of the latter prior to assembly (lasting). Moistening of the toe of the upper T is effected by introducing water vapour (steam) into the upper during the actual phase of reactivation of the rear counter (stiffener) of the upper, that is to say without the traction (pulling) exerted on the said upper for the reactivation having been relaxed.

Description

 The invention relates to a method and a machine for the manufacture of shoes å rod, including moccasins type.

 The manufacture of shoes with a stem, comprising a rear buttress between the rod and an inner lining, generally comprises a phase called "reactivation" during which the buttress lined with an adhesive material is first heated and then fixed by gluing to the shank and the lining being clamped between a punch and a press shoe, and a humidification phase of the stem end necessary for the subsequent mounting of the shoe. A production line for the execution of these operations then includes a "reactivation" station where the upper of a shoe is heated on its rear part while it is held on a punch by clamping its edges in traction clamps, this post being followed by a post of placed on a form inside which is injected water vapor for humidification of the rod end prior to actual assembly: The movement of the workpiece between different stations necessitates transfer means, and presupposes the presence of an operator at each of said stations, thereby increasing the times and costs of manufacture.

 In view of efforts to reduce these costs and increase productivity without compromising the quality of finished products, there is a need for a process and machine to simplify the manufacture of footwear, in particular shoes moccasins type, especially with regard to the humidification and reactivation phases involved in this manufacture.

 It is, therefore, an object of the invention to provide a method and a machine for achieving in a simple and safe manner both the reactivation of the shoe upper buttresses, as well as the necessary humidification of the tip of the shoe. the rod for the subsequent assembly thereof.

 It is also an object of the invention to provide a method and a machine particularly well suited to the manufacture of loafers, that is to say of shoes which, in general, are without fasteners and include a closed stem on the underside.

 It is, again, an object of the invention to provide an automatic machine for moistening ends and reactivation of the buttresses of shoe stems, in particular of the moccasin type, which is simple and safe to operate at a high speed. of production.

 It is. finally, an object of the invention to provide such a machine whose implementation does not require complex infrastructure and which, therefore, finds application in both large factories and smaller workshops where it can be used for the manufacture of low or medium series.

 A method according to the invention for the manufacture of footwear, in particular of the moccasin type, in particular for the reactivation of the rear buttress of the upper and the wetting of the end of the latter prior to assembly, is characterized in that said humidification of the stem end is conducted by introducing water vapor into the rod during the reactivation phase of the rear buttress of the rod, that is to say without the traction exerted on said rod for reactivation was released.

 The humidification phase thus takes place at the same time as the reactivation of the rear part of the stem or very soon after the end of this reactivation.

 According to another characteristic of the invention, the method is carried out simultaneously for a plurality of shoes so that, while the stem end of a first boot is wetted at a first station, the procedure is carried out at the same time. reactivating the rear portion of the shank of a second boot to a second station, preheating said rear portion of a third shoe to a third station, loading a shank of a fourth shoe to a second shoe; fourth station, etc ... so that certain operations being performed in masked time the progress of all phases of reactivation and humidification tips is short.

A machine for the manufacture of footwear, including moccasins type, in particular for the reactivation of the rear buttress of a boot upper and the humidification of the end of the latter prior to assembly, comprising a loading station where the rod shoe is placed on a form punch, a re-activation station at the rear of the rod, a humidification station for the rod end, and means for the sequential movement of the punch between these different stations is characterized in that that she understands
a plurality of punches disposed on a carousel;
a shaped tip corresponding to that of the rod end and a moistening water vapor diffusion member associated with each of the punches, according to a moving assembly
a boiler supplying the humidification station with water vapor
means for controlling the movement of each moving element associated with a punch for pulling the rod
step-by-step driving means and indexing of the carousel movement; and
means for automatically delivering steam to the humidification station in response to a control signal.

 In a preferred embodiment, the indexing device is constituted by the combination of a vee male with which is adapted to cooperate, successively, each of a purality of vés female carousel to allow the passage of the control signal.

 In an advantageous embodiment, the machine is equipped with pneumatic motors and the control signal whose passage is authorized by the indexing device is then also a pneumatic signal which controls organs such as cylinders, distributors, valves or the like. .

 The structure of a machine according to the invention is thus particularly simple and safe, the absence of rotary joint ensuring operation without hazards for increased production.

 The simplicity and reliability of operation contributes to the fact that the exhaust from the boiler is constantly connected to the open air except during the phase of introduction of humidifying water vapor into the rod, so that no Special precaution must be observed to meet the safety standards of the steam generators.

 In a particularly preferred embodiment, each shape nozzle assembly / water vapor diffusion member is adjustable to correspond to different sizes suitable for being manufactured on the machine, in correspondence of desiderata practice.

Other characteristics and advantages of the invention will become apparent from the description which follows, given by way of example and with reference to the appended drawing in which
- Figure 1 is a very schematic view in plan with partial cutaway of a machine according to the invention;
FIG. 2 is a schematic view illustrating a step of loading a shoe upper on a machine according to the invention;
FIG. 3 is a view similar to FIG. 2 illustrating the pulling of the rod
FIGS. 4 and 5 are diagrammatic front views corresponding to FIGS. 2 and 3, respectively
FIG. 6 is a diagrammatic side view, like FIGS. 2 and 3, illustrating the means for adjusting the drawing stroke and the means for moistening the end of the rod.
FIG. 7 is a schematic view also with partial detachments of part of the carousel
FIG. 8 is a very diagrammatic view illustrating the means for supplying water vapor for humidification of the boiler to the humidification station of the machine; and
- Figure 9 is a very schematic perspective view of a machine according to the invention.

 Referring first to Figure 1 which illustrates the structure of a machine according to the invention for the manufacture of footwear, including moccasins type, in particular for the reactivation of the rear buttress of a shoe stem T and wetting the tip of said rod. The machine, of vertical axis A, comprises a plate 10 able to be rotated step-by-step about the axis A in the direction of the arrow L by a pneumatic jack device 11 whose rod 12 is hinged on a connecting rod 13 driving a freewheel device, not shown, integral with the plate 10.Over this is erected a vertical facade which, in the case described and shown of a machine with six positions, comprises 12 panels referenced 14 "142, 14a, ... 14s, on the one hand and 15., 152, 153, ... 15c, on the other hand, the panels 14 and 15 being alternately and regularly arranged around the axis While the panels 14 are solid and each carries a set of hooks 167, 162, ... 16s of support of a shoe shape, the panels 15 are partly hollowed out, at their lower part adjacent to the plate 10, following an opening with a rectangular contour 20, FIGS. 3, 4 and 5, laterally bordered by strips 21 and 22.

 Each panel 15 forms the front face of a module 25 <FIGS. 2 to 7), the six modules 251, 252, 253, .. 25s being identical to one another and regularly arranged around the axis A, so that the detailed description hereinafter one of them applies to all those of the machine.

As can be seen in FIGS. 2 to 7, each module 25 essentially comprises a punch 30 fixed on the panel 15, shaped in correspondence of the rear part of the rod T and whose temperature can be set between 0 and 150 ° C. by one or electric heating resistor (s) 31 supplied by conductors 32. Below the punch 30 and projecting from the module 25, through the opening 20, each of said modules further comprises a mobile assembly 33 comprising a tip 34 whose shape corresponds to that of the end of the rod T and which is most simply formed by a triangular-shaped tube with rounded angles, inclined relative to the vertical plane of the panel 15, as can be seen in FIG. 6, and whose tip 35 is placed substantially in the plane of symmetry P of the module. In addition to the tip 34 the movable element 33 also comprises a hollow angled bracket 36 integral with the tip 34 at its upper part and whose small arm 37 has perforations 38 of its side wall, which ends at a short distance from the tip 35, while the larger arm 40 of the bracket 36 is carried by a slide 41 guided by vertical columns 42 and 43 erected on the base 45 of the module itself attached to the turntable 10.

 On the slide 41 is coupled the rod 46 of a pneumatic cylinder with double effect 47 supplied with pressurized fluid by two pipes 48 and 49 leading to a distributor 50, FIGS. 2 and 3. As salternally shown in these figures, each distributor 50 is connected by a pipe 51 to a pneumatic member 52 with six distributors, on the one hand and, on the other hand, can be connected by a pipe 53 to a control signal generator 60 present at the station C of loading rods on the machine where is also present a device 61 for passing or cutting the generated signal.

 The machine also comprises in the immediate vicinity of the plate 10 means 70 constituting a reactivation station of the rear of the rod T, said means known per se comprising on a gooseneck column a heating shaper 71 mounted to slide vertically and so adapted to be applied on the back of the rod for a predetermined time by an adjustable timer when, during the rotation of the plate 10, the rod carried by a punch 30 comes to the right of the means 70 which form the reactivation station R thus ensuring the bonding of the rear buttress between the rod T and the inner lining which is adjacent thereto.

 Downstream of the reactivation station R, in the direction of rotation of the plate 10 shown by the arrow f, is provided the moistening station H of the rod end, FIG. 1. This humidification of the rod end, which is a operation necessary prior to the mounting of the shoe, is performed at said station from the steam delivered by a boiler 75 with electrical heating resistance 76 supplied with water from a pipe 77 and the exhaust pipe 78 of which is interposed a steam solenoid valve 79. On the exhaust manifold 78 is also branched by a pipe 80 whose end remote from the boiler ends in a nozzle 81 ball stop 82 subjected to the action of a spring 83 and which is mounted in a support frame 84 guided in vertical translation by balusters 85 and 86, the displacement of the frame and the nozzle that it carries being controlled by a pneumatic cylinder 87 whose rod 88 is reached on said frame.

As shown in FIG. 7, the stop ball nozzle 81 is able to cooperate with each of the female nozzles 90 associated with a module 25, each nozzle 90 comprising a tube 91 causing the ball 82 to retract when the latter it is brought into contact with the tube under the action of the cylinder 87 and a nozzle 92 on which is fixed a hose 93 connected by a connection 94 to the arm 40 of the bracket 36.

 For the precise angular positioning of the plate 10 the machine according to the invention also comprises an indexing device 95, Figure 1, consisting of a vee male 96 adapted to cooperate with each of the female ves as 96 associated with the module 25 and whose movement horizontal translation, under the action of a pneumatic cylinder 97, is guided by slides 98 and 99.

 The operation of a machine according to the invention is as follows: The operator placed at the loading station C of the rods T on the machine has at his disposal a control signal trigger, for example a push button or, better, a pedal 100; when the plate 10 which is driven in step-by-step rotation by the jack 11, the connecting rod 13 and the freewheel, brings in front of the operator one of the modules 25 which it carries, for example the module 25c, the moving equipment 33 is brought into the initial condition shown in Figure 2 when the operator presses the pedal 100. In this initial condition, the crew 33 is close to the punch 30 so that the operator can put on the punch and the crew a rod T, as shown in Figure 2, by resting the rear portion of the rod provided with the buttress on the upper part of the punch; when the operator releases the pedal 100, the pneumatic signal that has been transmitted via the device 61 is interrupted, which causes the change of state of the distributor 50 and consequently the actuation of the cylinder 47 which moves towards the down the slider 41 to apply the tip 35 of the tip .34 against the tip of the shoe upper; the descent stroke of the slider is adjustable using a member 101 adapted to the various shoe sizes to be manufactured. A programming device, not shown, then controls the cylinder 11 and the indexing device 95 to clear the vee male 96 of the female vee 96 with which it cooperated and allow the rotation of the plate 10 of a sixth of a turn. A new module 25 appears in front of the operator at the station C while the module previously loaded, and the punch 30 is heated, approaches the reactivation station R.After new rotation of a sixth of a turn in the direction of the arrow i, the rod loaded first at station C reaches the reactivation station R where the shaper 71 is applied on the back of the rod, which is always under tension, so that the fixing of the buttress is carried out perfectly without risk of creases; after another rotation of a sixth of a turn, the rod which has just been "reactivated" at the station R reaches the humidification station H and, at said station, the steam solenoid valve 79 which was normally in its open condition , and thus allowing the evacuation of steam generated in the boiler 75, is closed at the same time as the cylinder 87 is made to operate causing the upward movement of the frame 84 which brings the mile nozzle 81 into the female nozzle 90 of the module then positioned at said station H.The water vapor from the boiler 75, which is preferably saturated water vapor at low pressure, of the order of 45 or, is then supplied by the pipe 80, the nozzle 81 , the nozzle 90, the pipe 91, the pipe 93, the bracket 36 and the perforations 38 of the arm 37 inside the rod T of the moccasin being manufactured for humidifying the rod end. When the amount of sufficient steam has been introduced into the rod, determined for example by means of a timer, the steam solenoid valve 79 is again open to the exhaust, the cylinder 87 is actuated in the opposite direction for removing the male nozzle 81 from the female nozzle 90 and the actuation of the cylinder 11 causes a new rotation of one-sixth of a turn of the plate 10. The rod T whose end has just been moistened at the station H then presents itself next station, I, Figure 1, where it is removed from the punch 30 and the tip 34 to be positioned on a shape that an operator grasps on the support hooks 16. This positioning. which takes place very shortly after humidification, that is to say while the rod is still malleable, can thus be carried out without difficulty.

 After two new rotations of one-sixth of a turn, the module 25 which was unloaded from the rod which it carried to the station I comes again in front of the operator to the station C and the process described above begins again.

 Since some of the operations, such as the pre-heating by the punches 30 of the rear parts of the stems, are carried out in masked time, on the one hand, and since by the carousel arrangement a plurality of stems are being produced. At the same time, on the other hand, high production yields, which can be of the order of 160 to 180 pairs per hour, are obtained by means of a machine according to the invention.

Claims (10)

REVEIDICATICIS  1. A method for the manufacture of shoes with a stem, in particular of the moccasin type, in particular for the reactivation of the rear buttress of the rod and the humidification of the tip thereof before assembly, characterized in that said humidification of the end of rod is conducted by introducing water vapor into the rod during the reactivation phase of the rear buttress of the rod, that is to say without the traction exerted on said rod for reactivation has been released.  2. Method according to claim 1, characterized in that the humidification phase occurs simultaneously with the reactivation of the rear part of the stem or follows very little of this reactivation.  3. Method according to claim 1, characterized in that while the wetting of the stem end of a first boot is carried out at a first station., At the same time the reactivation of the rear part of the stem is performed. a second shoe at a second station, pre-heating said rear portion of a third boot to a third station, loading a shaft of a fourth shoe to a fourth station, etc ... so that certain operations being performed in masked time, the progress of all the phases of reactivation and humidification of the tips is of short duration.  4. Machine for the manufacture of footwear, including moccasins type, in particular for the reactivation of the rear buttress of a boot upper and the humidification of the latter end prior to assembly, comprising a loading station where the shoe rod is placed on a form punch, a re-activation station of the rear of the rod, a humidification station of the rod end, as well as means for the sequential movement of the punch between these different stations, characterized in what she understands  a plurality of punches (30> arranged on a carousel (10)  a tip (34) of shape corresponding to that of the rod end (T) and a humidification steam vapor diffusion member (36) associated with each punch (30) in a moving assembly <33)  a boiler (75) supplying the water vapor humidification station  means for controlling the movement of each crew member (33) associated with a punch for pulling the rod (T>;  means for step-by-step driving and indexing of the carousel movement; and  means for automatically delivering steam to the humidification station in response to a control signal.  5. Machine according to claim 4, characterized in that the vapor diffusion member <36) of the movable element <33) is an elbow tube on which is fixed the end piece (34) itself consisting of a triangular generally pointed tube (35) directed from below.  6. Xachine according to claim 4, characterized in that the indexing device (95) is constituted by the combination of a vé malte <96) with which is adapted to cooperate, successively, each of a plurality of vés females (96a) of the carousel to allow passage of the control signal.  7. Machine according to claims 4 and 6, characterized in that the machine is motor means <11> pneumatic and the control signal whose passage is authorized by the indexing device (95) is then also a pneumatic signal which controls members such as cylinders (47, 97, ...), distributors (50), valves <79) or the like.  8. Machine according to any one of claims 4 to 7, characterized in that the exhaust <78) of the boiler (75) is constantly connected to the air except during the steam introduction phase. in the rod <T) controlled by the closure of a steam electro-valve <79) and in that said steam is supplied to the steam diffusion member (36) by a circuit comprising a male nozzle (81) ball ball <82) adapted to cooperate with a female nozzle <90) itself connected by a pipe <93) to the diffusion member <36>.  9. Machine according to any one of claims 4 to 8, characterized in that each moving element <33) is adjustable stroke by means (101) to correspond to the different sizes suitable for being manufactured on the machine, in correspondence of the Desiderata of the practice.  10. Machine according to any one of claims 4 to 9, characterized in that the carousel <10) is vertical axis <A) and organized according to six modules (25), each of which comprises a punch (30) and the associated members , the reactivation station <R> and the humidification station <H) are thus separated by a sixth of a turn.