EP0689778A1 - Procede de fabrication automatique de chaussures, et installation correspondante - Google Patents

Procede de fabrication automatique de chaussures, et installation correspondante Download PDF

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Publication number
EP0689778A1
EP0689778A1 EP95905646A EP95905646A EP0689778A1 EP 0689778 A1 EP0689778 A1 EP 0689778A1 EP 95905646 A EP95905646 A EP 95905646A EP 95905646 A EP95905646 A EP 95905646A EP 0689778 A1 EP0689778 A1 EP 0689778A1
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EP
European Patent Office
Prior art keywords
pallet
footwear
last
shoe
robot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95905646A
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German (de)
English (en)
Inventor
Adolfo Vilar Diaz
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Individual
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Individual
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Publication date
Priority claimed from ES9400109A external-priority patent/ES2074964B1/es
Priority claimed from ES9400759A external-priority patent/ES2111432B1/es
Priority claimed from ES9401298A external-priority patent/ES2109853B1/es
Application filed by Individual filed Critical Individual
Publication of EP0689778A1 publication Critical patent/EP0689778A1/fr
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D111/00—Shoe machines with conveyors for jacked shoes or for shoes or shoe parts
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D119/00—Driving or controlling mechanisms of shoe machines; Frames for shoe machines

Definitions

  • the present invention refers to an automated footwear manufacturing process, and the relative plant, and represents a revolutionary innovation in the technology of automated assembly of footwear, incorporating the most modern technological advances in the science of robotics, air-operated and hydraulic engineering and digital microelectronics, making this process the most productive, reliable production line and with minimum maintenance.
  • the process consists of a number of clearly defined steps, which are chronologically applied on the treated product, providing a manufacturing system that offers the interesting features that are given above.
  • Pallet conveyor plant for automated footwear manufacturing provides notable relevant and advantageous characteristics in respect of known systems, with which an optimum degree of footwear production is obtained.
  • a continuous cycle conveyor belt is used, to which the footwear parts are conveyed by the different handling phases: gluing, drying, injecting of soles, pressing, etc., both whether the footwear has injected sole or glued sole.
  • the field of the invention is also to provide a stopping mechanism for the pallets that accede to the different job stations worked by robots, where it is extremely simple and reliable to keep the footwear immobile during the robot operating phase.
  • the individual lasts conveyor pallet for the production of footwear, belongs to an automated conveyor line, whose main feature is the way the last locking and unlocking takes place in respect of the pallet which advances on the conveyor.
  • Each pallet embodies an electronic memory chip which programmes the operations which the footwear fitted in the last has to undergo, sending the information via the actual pallet turret, to the robots which perform the programmed operations which the footwear fitted in the last has to undergo.
  • pallets can mainly be used in all kinds of footwear production sectors or branches, whether this is footwear for children, men or women, shoes or boots up to 40 cm quarter height.
  • insole-fitting robot which is made up of an automated machine integrated and communicated in the same footwear production line arranged in the respective last which accesses at the conveyor chain pallets.
  • the automated machine which glues the footwear soles is also integrated in this production line, although it can also be used for general gluing operations, in automatic or manual systems for parts in the textile, leather industry, etc.
  • the field of the invention also embodies a special structure for a lasting furnace or stabilizing of the footwear, which is used for lasting by heat and also for stabilizing by cold, integrated in the same automated production line of the footwear, which in turn offers notable advantages in respect of the conventional furnaces that are preferably used in this footwear sector.
  • the footwear production line also has a robot to pound-up the edge of the footwear to which it has access mounted on the conveyor chain pallets of the lasts, offering the following most important advantages:
  • the pounding-up action of the shoe edge takes place naturally before the roughing and gluing of the sole and achieves a perfect union or gluing of the footwear uppers to the inner sole.
  • the strip that edges the uppers and which has been pounded-up against the inner-sole has a number of folds and reliefs which, after the process, adopt almost a flat shape.
  • the functional principle of the pounding-up robot is the use of hammer-like parts which, associated with a vibrator device which is driven by the motor of the pounding-up head, submit the entire shoe edge to numerous impacts, with a very high frequency, which produces the pounding-up of this peripheral band on the inner-sole that lies directly on the last.
  • the invention also contemplates the individual pallet for conveying soles, with locking and stop system, whose main feature is the ease of adaptation and locking of the different types of soles, both in size numbers (from 17 to 26), and in different models (from plain to bandlet for sportswear), and also their use which may be:
  • Another field of this invention is the fixture position of the pallet in respect of the conveyor chain when the robots are going to work on the sole, adapting perfectly to the base of the pallet, stopping them with a decimal precision.
  • the conventional footwear production systems include different steps that are not versatile enough to be carried out automatically, or to share their performance with others that are done by the same operator.
  • Present-day conveyors do not pass below the furnaces either. To take out the electronic memory chips where the operations that the footwear has to undergo are programmed, the present conveyors do not include a pallets park and another one for lasts. Conventional plants usually consist of a single conveyor belt which carries out the entire operation and contains all the components that form the shoe.
  • pallets are used today that lock the lasts and send information via the outside part of the pallet, making it difficult to produce footwear with high shanks, western-style boots, or riding boots or simply fashionable footwear with heights.
  • Spanish patent of invention number 444.649 is known, for: "Improvements introduced in a press to cement shoes or other parts of respective form", which embodies a pressing pad charged by a pressure agent, where the sole is fixed on flexible membrane to be cemented on the lasted vamp held in a guide for the shoe; this guide incorporating a switch that can be tripped forcibly by introducing the vamp; this switch connects the drive for the closure movement of the active cementing press parts, formed by the pressing pad and shoe guide.
  • the shoe guide is arranged stationary with the switch which it contains, on the press rack, and the pressing pad is movable in respect of the shoe guide.
  • the shoe guide with the guide switch and pressing pad can in addition be moved towards one another, tilting the pressing pad around a shaft by means of a cylinder, and at the same time in correspondence with it there is a protector bell.
  • the shoe guide is supported by a system of tilting levels, which is operated by a cylinder.
  • a safety gate arranged at the front of the guide which can be moved for the shoe.
  • the Spanish patent of invention 511.868 claims "Improvements introduced in machines for cementing soles on footwear", where there is a pad with two independent chambers, with prior vacuum in both, and where one of them is closed by a semi-elastic membrane and the other by a super-elastic membrane.
  • the pad tilts on a shaft, thanks to a cylinder drive.
  • the lasted plate which has a space where the shoe is fitted, is interchangeable.
  • furnaces for lasted or stabilizing footwear those which are available today have the disadvantage that the conveyor assembly passes and runs inside them, and also the respective shoe which is placed with the lasted part facing upwards.
  • both the chain and the pallets enter them and other related elements, so that the internal cavity or chamber of the respective furnace is too big, and a large amount of energy is consequently needed to heat this cavity to the desired temperature, apart from more time being needed to reach this temperature, and also when wishing to increase it, in the positive or negative sense.
  • footwear uppers reactivators that are available today are manual and in no way automatic and with an artificial vision system that distinguishes any type of shoe, depending on model, number, foot and colour so it can thus be stored in the same order as they will later be used on the assembly line, controlled by the computer.
  • the last that carries information inside informs about the model, number and crown-heel length which is going to reach the robot which will fit the inner soles; this will select the corresponding insole and will fit it on the last, centering it properly.
  • the pallet will then continue on to the conveyor chain or belt until the next stop, where it will proceed to shoe or fit the crowns, heels and shanks; this work is carried out by one or more operators.
  • the conveyor belt in continuous cycle transfers the footwear pieces through the different handling steps: cementing, drying, injecting of soles, pressing, etc.
  • the conveyance is done according to two continuous closed cycles, in one of which the lasts are conveyed and in the other the soles or bottoms, which cross at different points, depending on the plant design or requirements, so that the lasts conveyor line crosses above the soles.
  • the last when the footwear emerge from the furnace where it has undergone a temperature between approximately 80° and 120° C, for a few minutes, the last again rotates 90° and is set as it was previously to automatically enter the zone of the robot that handles the pounding-up of the shoe. The last then continues on to the robot which makes the heel seat (when the shoe is botier type), otherwise it continues directly to convey the last to the six-shaft robot which will proceed with the roughing of the lasted and the side.
  • the shoe After being roughed, the shoe is then moved to the robot stop where the cement is applied, and pre-cementing if required, that is to say, a preliminary base before cementing.
  • the adhesive can be applied twice taking advantage of a loop in the conveyor chain, so that at the second stop a thicker cement will be applied, and at the same time this same robot will also apply cement to the sole which will be fitted in this zone, conveyed by its respective chain.
  • the last then rotates 90° again and is introduced in a cold conditioner tunnel from which it emerges automatically to the robot which extracts the shoe from the last which has conveyed it during the entire process, breaking the seal or flange that secures it, and proceeding to empty the finished shoe, whereby the production process is then concluded.
  • the respective robot can firstly apply a pre-cementing layer, and the shoe then moves along the loop to allow time for it to dry and then the same robot applies the standard (ordinary) cement, and in turn accedes to the soles chain and carries out an operation on that chain.
  • these pallets can be locked by the raising of arms whose ends are fixed into the guides of the pallet, applying them against upper wings of the plant. In this way and because the pallet is slightly raised, it loses contact with the conveyor belt and the footwear thus continues immobile although the chain continues to advance.
  • the individual conveyor pallet of lasts for the footwear production is formed by a rigid structure that consists of an upper guide to connect the last and for the information terminal, and also other lasted components and stopping notches of the pallet, dependent of the position where this lies on the conveyor.
  • connection of the last is performed by means of a part or turret which is secured to the last by screws and can be plugged into the pallet guide.
  • connection system to the pallet allows a fast handling operation, at the entry and exit to the pallet, by an operator or by a robot. It can thus be locked and unlocked quickly and be handled without risk of it coming out of its guide, because it has an automatic auxiliary fastening system, as we will see later.
  • the chip that sends the information is located in a guide of the turret, and in the event of a fall, it is protected from direct impact.
  • the locking and unloading motion of the turret which carries the list, in respect of the pallet, is contained inside the pallet, to largely help the work that is to be performed on the different types of footwear, because it allows a shoe and a boot to be worked.
  • the information that is contained in the chip is sent by a connector located at the top of the turret, through which it passes to a terminal at the side of the platform of the turret for reading. It is all located inside and there are consequently no cables or connections to hinder the work on the pallet.
  • the guide at the top of the pallet for connecting and securing the turret has a prismatic shape the same as the connecting end of the turret. Connection is made because the front and lower part of the turret includes gears that can be inserted in a lower notch of the guide of the pallet, when the turret is shifted sideways, after the insertion has been made, assisted by a spring-loaded system. This moreover has a locking/unlocking motion of this connection of the turret to the pallet, defined by a rod which vertically crosses the pallet and is driven by a lower loader. When this rod is lifted against a recovery spring, it emerges to the receiver guide of the turret, and is placed between the rear part of the turret and the wall of its guide. Until the rod is withdrawn, the last locking is thus assured.
  • the pallet has stopped and is locked, it has a terminal at the bottom which connects at the bottom with the chip of the last, contained in the turret, and it can send the necessary information to any robot without worrying about what type of footwear is made, by means of a reader.
  • information can be deleted and sent from the control station of the chain to the chip, from the inside of the pallet, the information can be modified or increased from the control station of the chain, without having to remove the manufacturing last, or handle other elements.
  • Information can be given or removed at a station that is created for this purpose and which is controlled by the industrial computer and its software created for this purpose, in a fully automatic and reliable manner.
  • the mechanism which is designed for introducing the turret with the last in the pallet, when the locking rod does not operate, allows a far easier connection without affecting the insertion zone (case of heights), because the place of insertion can be made easily and very quickly.
  • the pallet comes in two parts and with a strong, reliable connection system, it can work perfectly with robots, non-stop, without creating any problems at the different work stations, so that when the last is extracted from the base pallet, it always incorporates the necessary information in the chip and in this way avoids the possibility of making errors, by inserting another last on the pallet, or carrying out work on the single last, outside the pallet and conveyor chain.
  • the incorporation of a novel part is also foreseen which acts as union between the last and the pallet, and is attached to the last in a stable way.
  • the pallet incorporates a shaft which acts as locking element on the intermediary part.
  • the unlocking rod crosses the entire pallet and this hollow shaft, unlocking the last by shifting it endlong.
  • the insole-fitting robot which forms another of the basic automated stations of the plant, is made up of the following fundamental elements:
  • the inner soles that are stacked on the round feeder are stocked by pallets that carry these soles, which embody magnetic fingers that work as guide and lasting pillars, and there is also a possibility of arranging them according to the geometric shape of the insole.
  • This conveyor head places the insole, after cementing it, on the last, a few millimeters from it, without touching it.
  • It consists of a structure that is made up of a quadrangular base, from which four slightly sloping pillars run upwards, which are joined at the top to a bridge that supports the cementing chamber.
  • an adjustable table to adapt to the different lasts and sizes, which is also divided to enable a device to open and make way for the last and lasted footwear on it; this opening and closing motion is carried out by means of air-operated cylinders which drive arms or legs that support the table.
  • the arms have an articulation at their lower ends and a spindle with a nut which is operated by a transmission and reduction motor which has an electrical brake, that regulates the height of the work controlled by the integral control of the plant.
  • the cementing chamber which is molded and cast in injected aluminium, is supported by the upper bridge of the described structure, where different kinds of membrane can be fitted on this chamber, mainly double flange.
  • the chamber assembly has a control system, for up or down control, worked by a transmission and an electrical motor with electrical brake incorporated.
  • the pressure on the sole and that of the band may be different off-phase in time for adapting depending on the type of sole to be cemented, which achieves a superior quality in the different production types.
  • Control of the electrical motor is made with the integral line control.
  • the machine thus receives the last with the respective footwear by means of the pallet which is conveyed via the product line chain, so that when the last reaches the machine, it waits with the table open and cementing chamber at the top. Because this is centered in the machine, it closes the table and the chamber drops and enters the lasters and locks the assembly, giving the signal at that moment to the electric operated valves for the compressed air to enter the cementing chamber, passing first via a sequence valve to provide prior pressure to the sole, to later immediately proceed to the contour; equalling the pressure that both increase, causing a regulation in accordance with the respective type of footwear. Pressure is maintained for the amount of time established in advance and once the cementing has been made, the pressure is removed. The cementing chamber then goes up and the mixture opens to allow the last holder pallet to emerge and the next one to consequently enter, and so on successively.
  • the lasting furnace or stabilizing of footwear we can say that, as compared with known furnaces, this is also integrated in the product line, because it has a chassis or rack formed by a metallic structure at the top of which the furnace is fixed, which has a heating chamber which communicates with the outside by means of a narrow longitudinal lower opening, protected or covered by a curtain to avoid where possible the outlet or release of heat produced inside.
  • the chain that conveys the pallets that carry the lasts of the shoe advances and moves under the furnace and enters this rack, so that only the lasts, with the corresponding shoe, pass inside the heating chamber where it will remain for a suitable time until the required temperature is reached, which will occur in a very short space of time, because this heating chamber has a relatively small volume and the energy employed will also be small and put to very good use.
  • the automated machine of the robot offers the notable advantages that have been described above in respect of existing machines and both function and automated machines. It is very easy for the robot to adapt to the shape of the footwear, performing a homogeneous and fully automatic work.
  • This robot is integrated in the automated product line which conveys the shoes, linearly, that are already in the last and on their pallets, and on the conveyor line which feeds, pallet by pallet, this pounding-up robot, which receives information about the type of shoe it has to pound-up, and operates as programmed, applying the suitable pressure and fit, without at any time requiring manual labour.
  • It consists of a metallic structure, defined by a base that can be secured to the floor or else supported on floats or rubber-blocks which dampen vibrations.
  • Four oblique pillars emerge from this base which are joined at the top in pairs and at these cross pieces there are two cross rods which materialize the sliding guides of a conveyor assembly formed by a rotary head driven by a motor.
  • a dolly moves along these guides, from which the pounding-up head hangs, which hits the edge of the lasted arranged on the last, assisted by its respective vibrator motor.
  • the pounding-up head can carry out longitudinal, cross travel and vertical movements because the conveyor unit is assisted by cylinders and springs, and the hammers adapt to the concave and convex curves of the shoe and absorb any irregularity which it may have.
  • the stopping system locks the pallet, worked by a sensor, and the shoe fixture unit is enabled, operated by two side cylinders anchored to cross members of the metallic structure, supported on rubbers to avoid marking the shoe crown and heel.
  • the conveyor assembly is then started up which leaves the hammers at their initial position to commence pounding-up, and the hammering programme then begins, rotating on the entire shoe until the last is set at the desired angle.
  • the pounding-up head At the end of the entire cycle, the pounding-up head returns to its initial setting and allows the pallet to leave, to wait for the next one.
  • This conveyor chain of soles passes through each of the robots, where some job has to be performed. When it reaches them, the pallet fixture system comes into operation which, by means of a fixture piston, leaves it tightly locked, and with great precision so that the pertinent programmes can be developed with repetition and without moving.
  • the fixture station of the pallet is defined by a pillar that is secured by a base to the ground, below the conveyor chain, and this pillar is finished in a "U" bracket at the branches of which the pallets move.
  • One of these branches embodies a side piston that secures the base plate which materializes the surface of the individual pallet.
  • this base plate embodies a number or orifices that occupy an extreme portion of its rectangular area. At the other end it includes a notch or longitudinal notches for the guiding of a part or accessory that secures the soles, which works in combination with another accessory that has previously been located in one of the orifices of the base plate, whose position has been selected dependently from the sole size.
  • Another accessory that secures the sole which can be used for small sizes, is determined by a clip which can rotate at one of its end, precisely where it is crossed by a shaft screw which in turn passes through one of the plate orifices.
  • the clip is assisted by a torsion spring which establishes side torsion on the sole, by means of a fluted section cam which is exchangeable.
  • the sole is secured when it rests on a flap or dismountable side wall of the base plate.
  • the footwear uppers reactivator Lastly, referring now to the structure of the footwear uppers reactivator, we can see that in general lines this is integrated in the automated product line, identifying each type of uppers and storing it in an orderly manner inside the load unit, by means of a control by artificial vision, thus offering the notable advantages which we have listed earlier.
  • the storage system inside the load unit is orderly, depending on whether the computer that controls it has been programmed.
  • the palleter which defines the loading station in which the successive footwear uppers are going to be stacked on a pallet that can be moved vertically.
  • the rear part of the palleter secures the uppers and this in turn is secured by a special clip located at the front, thanks to which the thickness of the leather of the uppers is controlled.
  • This front zone of the uppers is in turn positioned under a video camera, and when the uppers are illuminated at the bottom with a lighting system, the size number, foot and model and also the colour of the leather are also identified.
  • identifications are given by a code marked on the edge of the uppers of the footwear and which has been made at the time of the clicking, and consist of a number of notches performed along the edge, defined by a binary code and located in a specific place to be read and transmit all the information to the computer.
  • the identification of the colour of the leather is sent directly to the computer by means of the artificial vision.
  • the computer approves this, it is assimilated towards the inside of the loading station, where they are going to be stored, in an orderly way, for later assembly.
  • This station is in charge of reactivating the uppers by steam and heat, depending on the type of leather and characteristics.
  • this pallet with all the stacked uppers is conveyed to a nearby dolly where it is stored and where the reactivation is being carried out.
  • This dolly can fill up to three pallets of uppers stacked in pairs and is the element in charge of keeping them at the optimum temperature and conveying them to the station of use, where they will be lasted, in the order marked by the programme and which have already been placed by the inspection station.
  • Figure 1. This is a diagrammatic view of the conventional system for manufacturing the lasted shoe, where a large number of operators intervene.
  • Figure 2. This is a diagrammatic view similar to figure 1, of another conventional manufacturing system of lasted sports footwear, where shared operations cannot be carried out automatically.
  • Figure 3. This is a diagrammatic view of a plant in which the manufacturing system of lasted sports footwear can take place, in accordance with the invention, affording great versatility and a notable increase in production.
  • Figure 4. This is a diagrammatic view, similar to figure 3, of the lasted shoe production process, in accordance with the invention.
  • Figure 5. This is a diagrammatic plant view of the pallets conveyor plant for the automated footwear manufacturing.
  • Figure 6. This diagrammatically shows different positions of the sequence of movements to obtain rotary motions of 90° on the pallets, when they reach the points where this movement has to be carried out.
  • Figure 7 and 8. are respective raised views of the stopping motion of the pallets, in the "locked” and “unlocked” settings, respectively.
  • Figure 9. This is a raised selected view of an individual lasts conveyor pallet for the automated footwear manufacturing, in accordance with the invention, including the last and the conveyor chain of the different pallets; this view corresponds to a cross-section in the direction of movement of the chain.
  • Figure 10. This is a raised view, similar to figure 9, without including the last and its connecting turret to the pallet, nor does it include the conveyor chain.
  • Figures 11, 12 and 13. are respective raised side sectioned views, lower plant and upper plant of what is shown in figure 10.
  • Figure 14 This is a raised sectioned view of the turret or element that connects the last to the main section of the pallet.
  • Figure 15. This is a section via the A-A upper line of figure 14.
  • Figures 16 and 17. These are respective sectioned raised and lower plant views of the part that acts as union between the pallet and the last, in an alternative form of embodiment in respect of figures 9 to 15.
  • FIGS 18 to 22 are different views of the connecting parts of the turret, in this second form of embodiment, in accordance with figures 16 and 17.
  • Figure 23 This is a sectioned longitudinal raised view of the individual lasts conveyor pallet, with the different lasted elements, in accordance with this second form of embodiment.
  • Figure 24 This is a longitudinal raised view of the sole-fitting robot, in accordance with the invention.
  • Figure 25 This is a plant view of what has been shown in the figure 24.
  • Figure 26 This is a perspective view of one of the pallets that carries the insole incorporating the fingers or magnetic pillars for centering the stack.
  • Figure 27 This is a perspective view of what is shown in the figure 26, to observe the lower side of the pallet.
  • Figure 28. - This is a raised view of the automated machine for cementing footwear soles, in accordance with the invention.
  • Figure 29. - This is a section view of the automated machine of figure 28.
  • Figure 30. - This is a plant view of the same machine as shown in the figures 28 and 29.
  • Figure 31 This is a diagrammatic raised view of the lasting furnace or footwear stabilizing, in accordance with the invention.
  • Figure 32 This is a front view of the same furnace of the figure 31.
  • Figure 33 This is a cross raised diagrammatic view of the robot for pounding-up the shoe edge in accordance with the invention.
  • Figure 34 This is a longitudinal side raised view of what is shown in figure 33.
  • Figure 35 This is a perspective diagrammatic view of the lower face of the footwear, to see the zone for pounding-up.
  • Figure 36 This is a perspective view of the base-plate which materializes one of the individual pallets to convey soles, in accordance with the invention.
  • Figure 37 This is a perspective view, similar to the figure 36, with the pallet complete with the dismountable side wall, including a fixture system for the sole, different to the one used in the figure 36.
  • Figure 38 This is a cross raised view of the individual pallet for sole conveyor, integrated in the automatic conveyor chain, precisely in the zona occupied by the fixture position or stopping of the pallet, when the pertinent fixture piston is operated.
  • Figure 39 This is a plant view of the footwear uppers reactivator, in accordance with the invention, which includes the actual conveyor and reactivating unit and the load unit and control by artificial vision and initiation of reactivating.
  • Figure 40 This is a partial raised view of what is shown in the figure 39.
  • Figure 41 This is a perspective view of what is shown in the figures 39 and 40.
  • Figure 42 This is longitudinal raised section of the footwear uppers reactivator, to observe the inside of the loading and conveying station.
  • Figure 43 This diagrammatically shows three phases of the storage process of the upper identified and accepted as valid.
  • Figure 44 This is a partial view of the implementation of the upper of the footwear, specifically at the front where there are the identification marks of the characteristics of the upper.
  • Figure 45 This is a partial view of the implementation on self-adhesive paper of the different binary codes for identification of the characteristics of the upper, arranged in strips which must be adhered to the uppers clicking knives.
  • Figure 46 This is a perspective diagrammatic view of one of the clicking knives that has one of the binary code strips partially adhered as shown in the figure 45, corresponding to certain characteristics of the shoe.
  • Reference 3 designates the machine for nailing inner soles
  • reference 4 the machine for assembling crowns
  • reference 5 indicates the machine where the heels and shanks are assembled
  • reference 6 corresponds to the pounding-up machine.
  • References 7 to 10 designate respectively: the uppers reactivator with lasts and soles, the reactivator of the heel-pad, the lasting furnace and the conveyor towards the machine for roughing the lasted, the latter referenced as number 11.
  • the product By means of another conveyor belt 10 the product reaches the next operator 2 who performs the cementing of sole and shoes at the work station referenced as number 12.
  • Reference 13 indicates the zone where the drying of glue takes place reactivated by flash.
  • Drying zones or waiting time can thus be determined in these loops and also that a same robot can firstly apply a pre-cementing film and after the shoe has advanced along the loop to allow time for it to dry, again apply the standard (ordinary) cement and also accede to the conveyor chain of soles to make a third operation.
  • Reference 32 shows the supply position of the insoles, uppers and soles, according to the information that a computer supplies the operator. This operator is allowed time to load the order of forty pallets and to change the uppers reactivator to the laster of crowns, heels and shanks, and is also in charge of loading the inner soles on the inner soles robot, of the first mentioned step.
  • the robot 33 receives the shoes which come out from the furnace, once the pallet has rotated again, and is in charge of pounding-up the shoe.
  • Robot 34 roughs the side.
  • Robot 42 cements side and lasted.
  • Reference 43 shows the aspirator of the roughing robots, and the reference 44 the cement tank.
  • References 55 and 56 designate the zones of the conveyor chain where there are loops. In this plant, the uppers reactivator has been given the reference number 57.
  • the robot 57 positions the last in the machine for injecting soles 58 and from this machine to the conveyor chain 23.
  • the robot 57 positions the last in the machine for injecting soles 58 and from this machine to the conveyor chain 23.
  • the pallets must rotate 90° for the footwear to enter longitudinally and not crosswise in the drying tunnels, furnaces, reactivators, etc.
  • the system that produces this is represented in the figure 6 and consists simply of an element that detects the approximation of the pallets to the point where the rotary motion must be made, ordering the raising of a stub 60 which is introduced in a guide on the lower side of the base 61 of the pallet, securing it at one of the corners so that the driving motion of the belt 23 automatically produces the desired rotary motion, as shown by the sequential order of the four positions in this figure 6.
  • the pallet 25 is slightly elevated in respect of the conveyor belt 23, so the latter can thus continue its course.
  • Reference 23 designates the conveyor chain on which the pallets 66 advance. For the robots to work on the shoe arranged in the last 68, pallet 66 is stopped and locked, and is detached from the conveyor belt 23, as shown in the figure 9.
  • Pallet 66 has a guide 70 at the top that connects the turret 67, which contains a bushing 71 that reinforces the walls against breakages and wear, and which has a lower notch 72 (see figure 10) that receives the cog 73 of the turret (see figure 14).
  • the turret 67 embodies an orifice at regular intervals 74 where the automatic auxiliary fixture system is located, consisting of a laster and a spring, where the free end of the laster is inserted in orifice 75 of the prismatic bushing 71.
  • the pressure by this spring obliges that, once the turret 67 is perfectly inserted in the guide 70 of the pallet 66, it moves sideways so that its cog 73 is inserted in the notch 72 of the bushing 71, thus acquiring the connecting position of the figure 9.
  • Locking takes place with the raising of rod 76 which vertically crosses the main section 66 of the pallet 25, and is activated by the loader 77 and by means of the base 78, against the action of the recovery spring 79 of the initial unlocking position.
  • the upper or active end of the rod 76 breaks into the guide 70 of the main section 66 of the pallet, and is inserted between both sections, preventing the cog 73 from coming out of the notch 72.
  • the information terminal materialized by the electronic memory chip, is referenced as number 80 and is located on guide 81 at the bottom of the turret 2.
  • the base or bottom of the guide 70 of the main section 66 has another space that contains the part that carries the connector 82 of the chip 80, passing the information via the cable 83 which crosses the centre of the pallet 66, passing via the lower channel 84 of the base of that main section, to join the information terminal 85 (see figure 12).
  • the reader 86 (see figure 9) transmits the information to the robot which has to handle the footwear that is found in the last 68.
  • Reference 87 of the figure 10 designates the socket of the laster of the pallet 66, and reference 88 shows the notches of the lower end of the pallet, to make it possible to change their position by a rotary device of the plant, which is not shown in the figures.
  • reference 89 designates a lasting orifice to mark the correct position of the last 68.
  • the intermediary zone of the turret 67 as is shown in the figure 15, there is a spindle section towards both sides, and also central notches to facilitate and guide their entry in the drying tunnels or plant furnaces, thus preventing an unnecessary loss of heat.
  • the pallet is locked at the points where some operation has to be performed on the shoe, because the lasting pins are included, preventing any movement of the pallet.
  • the interior mechanism is enabled on the main section 66 of the pallet 25, which locks the last-turret connection, also preventing its movement in all directions.
  • the information of its chip 80 is then read and the pertinent operation is consequently performed on the last 68 which this pallet 66 carries.
  • a novel part 90 is used, which acts as join between the above two elements. This part 90 is joined to the last 68 in a stable manner, with screws or any other means or even inserted in it.
  • the pallet 66 incorporates a shaft 91 which is slightly tapered and hollow, which acts as locking element of the joining part 90, when introduced via the conduit 92, which is also of tapered configuration.
  • the unlocking shank 93 transverses the whole of the pallet and shaft 91, to unlock the last when an upward endlong movement is applied from the stopping on the manufacturing line.
  • the part whose plant view corresponds to the figure 19 and whose raised view we can see in the figure 23, is a base where the unlocking rod 93 is associated and which forms the zone where its endlong raised system operates, in this example of alternative embodiment.
  • Reference 95 designates the round feeder where the inner soles 96 are classified arranged on different stacks, as we can observe in respect of the figure 27.
  • the cushioning head is referenced in general with number 97 and carries the suction pads 98 that take the in-sole 96 to be carried along the bridge 99, to the other end of the robot, passing first through the cement injectors 100, as we have previously indicated.
  • the cushioning head 97 leaves the insole on the lasting plates 101.
  • Reference 102 designates the loader element which knocks the last to unlock it in respect of the pallet so that the operator who carries out the lasted can separate it from the pallet easily and quickly.
  • feeder 95 which operates in a rotary motion when it receives orders from the last 68, which reach it, to select the number and foot size of insole which must be fitted. Only one operator is needed to reload the pallet when it is empty and who is the same operator who is in charge of the "pc" and changes the uppers reactivator and places the soles on the soles pallet.
  • the round feeder 95 has a round table, integrated in the machine, which rotates driven by the respective motor to select the type of in-sole 96 that is needed. It is divided into pallet holder and pallets 103 that can be easily changed. In figures 26 and 27 we can see the geometry of these pallets 103 and how they have magnetic fingers or tubes 104, carriers of high power magnets and which act as guide to correctly position the inner soles 96. More than twenty inner soles can be stored on each pallet 103.
  • the head 97 Independent of the position adopted by the feeder 95, the head 97 will take the respective insole in accordance with the previously established programme, selecting each model according to the orders received from the chip. These are quickly dismounted (without screws or hooks) and can be rapidly changed for other pallets, when these wear out.
  • the head 97 When the head 97 receives the information, it is placed at the programmed measurement and ready to go down so that its two suction pads 98 pick up the insole 96. Once this has been picked up, they are conveyed longitudinally in the direction of the last 68, passing first by the cement injectors 100. The head 97 then continues its cross travel until the insole is positioned above the last, without touching it. Once the head 97 is in position, containing the insole 96 above the last, with a certain tolerance, the position-ing dollies 101 operate lengthwise, centering the insole 96 in this direction. Immediately after this four air-operated fingers come into action which center it widthwise, leaving it perfection positioned so that upper checks adhere the insole to the last with precision, which is done after eliminating the vacuum action of the suction pads 98.
  • the round feeder 95 can incorporate various soles and not just one, as we have shown in the figure 24.
  • the upper round feeders will have a radial interruption on their surface, to allow the suction pads to have access to the lower bottoms.
  • glue spray-nozzles 100 The possibility of eliminating the glue spray-nozzles 100, is also contemplated, using lasts 68 that incorporate some small oblique spikes that retain the insole 96, without avoiding their easy extraction thanks to the sloping layout which they adopt.
  • FIG. 28 the structure of the automatic machine that is used to cement the footwear soles can be seen, in accordance with the invention.
  • This consists of a quadrangular base 105 which acts as support for an adjustable table 106.
  • Slightly sloping tubular pillars (uprights) 107 depart upwards from the corners of that quadrangular base 105 (uprights), which are joined to an upper bridge 108, which supports a cementing chamber 109, forming the quadrangular base 105, the tubular pillars (uprights) 107 and the upper bridge 108, the machine structure, where on the other hand these three parts are manufactured, with hot rolled sections.
  • the table 106 located between the pillars 107 has a regulation system to adapt to the different shapes and sizes, which is divided into two parts and each fixed to two couples of arms or legs 110, each of which is related by means of an air-operated cylinder 111, where these arms are articulately coupled at the bottom, to a support 112 by means of pins 113.
  • Each support 112 is solidary to an upright spindle 114 coupled to a nut 115 which has a gear ring 116 where a chain 117 is engaged coupled on the other side to a pinion 118 fixed to the shaft of a reduction motor 119 with electrical brake.
  • each nut 115 can rotate freely to raise and lower the table 106 and position it at the necessary height, at the same time as these nuts 115 are locked and secured endlong by a ring 120 screwed to a tubular prolongation 121 fixed to the quadrangular base 105.
  • this vertical spindle 122 the cementing chamber 109 is connected by means of a pin 127, which has a double flange membrane 128, that can easily be exchanged if necessary, and at the same time this provides a guide 129 for the corresponding footwear 130.
  • This nut 124 is fixed endlong by means of a ring 131 screwed to the upper bridge 108.
  • the machine of the invention includes side protections 132 in fine plate.
  • the pressure is maintained for the time fixed in advance and once the cementing has been done, this pressure is removed.
  • the cementing chamber 109 then goes up and the table 106 opens to give an outlet to the last carrier pallet and enter the next and so on successively.
  • the table 106 which is divided into two parts, is opened by means of the air-operated cylinders 111 connected to the corresponding arms 110 to give way to the carrier pallet to enter and leave, once the cementing operation has been done.
  • the lasting furnace or stabilizing of footwear embodies a chassis or rack 134 defined by a metallic structure formed by two alignments of upright pillars 135 and other horizontal or transversal ones 136, fixing at the top of these upright pillars 135, the actual furnace 137 which has a central heating chamber 138 that communicates with the outside via a narrow lower longitudinal opening 139 protected by a curtain 140 to mainly prevent the escape of heat produced inside and also to help maintain the necessary temperature.
  • the rack 134 is covered by plate or covers that enclose, inside, the mechanical and thermal system that produces the heat or cold, depending on the lasting furnace or stabilizing.
  • the rack 134 which supports the actual furnace 137 is advantageously integrated in the manufacturing line of the footwear, so that between the upright pillars 135 and beneath the furnace, the conveyor chain runs, which contains the pallets with the footwear lasts, so that when the chain advances, it is introduced inside the heat chamber 138.
  • Cylinders 141 have been foreseen that retain the pallets when these are in any position along the chain, not attached to it because this does not stop at any time.
  • the holding cylinders 141 will trip for the footwear to continue inside this chamber for as long as is necessary.
  • the chassis or rack 134 embodies ventilators 142, which, if necessary, introduce air from the outside, inside the heat chamber 138 to very quickly modify the temperature conditions inside the furnace.
  • the lower opening of the furnace only allows the longitudinal entry of the footwear inside the heat chamber, heating or cooling only the strictly necessary mass.
  • this longitudinal entry of the shoe allows the heating chamber to have a reduced width, which thus occupies a relatively small volume, so that, to reach a given temperature, a small amount of energy will be needed.
  • the conveyor unit is at all times outside the furnace, which avoids problems of failures and oxidation of the different components, among which is the electronic memory chip, which carries the information about the operations to be made in the footwear, as we have repeatedly said.
  • the reference 146 designates the rack fixed to the ground, which supports both the pallets conveyor and the pallet locking device, reference number 147, when the hydraulic cylinder 148 is operated, pressing the longitudinal edges of the pallet against the upper flanges 149 of the frame 146, as is deduced when observing figure 33.
  • the dolly 152 of the conveyor unit 151 moves in a crosswise direction to the movement of the pallets conveyor, guided on bars 153.
  • Reference 154 designates the air-operated cylinder that shifts the dolly 152.
  • the movement of the head is obtained with the motor 155 and that of the pounding-up head 150 with the electrical motor 156.
  • this head 150 knocks the shoe via the hammers 157.
  • the number of hammers 157 depends on the type of shoe, where a side hammer and another upper one is needed for the lasted, or simply one side hammer and which is made up of a shaft and a loose roller that adapts to the shoe, leaving the angle of the lasted perfected, as is deduced when observing the detail of figure 34.
  • the locking device 147 of the pallet works with high precision stopping the conveyor pallet on the chain that has a pad that absorbs all the vibrations that are transmitted by the motor 156 when pounding-up, to avoid failures at any part of the pallet and machine.
  • the side cylinders 158 come into operation which belong to the assembly that secures the footwear, which is fixed and with no variation in movement.
  • the rubber supports, to avoid marking the shoe, are referenced with number 159, may also be of clip type, as we have mentioned earlier.
  • the conveyor assembly is worked which carries out crosswise, longitudinal and vertical movements, all dampened by cylinders and springs, to adapt fully to the convex and concave curves of the shoe and absorb any irregularity which it may have.
  • the hammers can be replaced or complemented with a roller of leather blades, which when rotating, would eliminate any excess creases or else by a roller of rings or similar, crossed by a rotating shaft of smaller diametre, which are displaced by centrifugal force to hit the lasted.
  • These cylindrical hammers have heating with temperature control, so that, with the suitable heat, they can flatten the leather better when hot.
  • All the machine movements are controlled by a programmed robot, which receives the orders via the chip carried by the lasts.
  • the individual pallet for sole conveyor, with locking and stopping system in accordance with the invention, generally has the reference number 163 and is materialized by the base plate 164 at the bottom of which are the guide mechanisms and immobilization means for the conveyor chain, as can be seen from figure 36.
  • This lower part of the pallet has the reference number 165.
  • Reference 166 designates the plurality of orifices existing at one of the halves of the base-plate 164, to be able to suitably assembly the unit that contains the sole, as referenced with 167 in figure 36, or referenced with 168 in figure 37.
  • Figure 37 diagrammatically shows the way that the fixture or total immobilization of a sole 174 will be done, corresponding to one of the highest sizes.
  • the rear of the sole 174 is supported on the "V" shape arms of the fixture unit 168, located in one of the selected orifices 166.
  • the front part of this sole 174 also rests on the arms of the fixture part 173, from pressure exercised by the spring 171.
  • the sole 174 corresponding to one of the smallest sizes, is perfectly immobilized against the projections 175 and 176 of the contiguous edges of the base-plate 164, which can be prolonged in the dismountable flap 177; this immobilization is achieved by the pressure exercised by the fixture unit 167 whose structure and functionality we are going to be described below.
  • This fixture unit 167 is materialized by the laminar part 178 which generally has a triangular contour, oscillating at one of its vertex, around the screw-shaft 179 that passes through one of the orifices 166 of the base-plate 164. At the most distant vertex is the pin 180 to provoke the angular deviation against the spring 181 which assists the screw-shaft 179 and this laminar part 178 to achieve side pressure on the sole 174, through the cam 182 of notched section 183.
  • Cam 182 is interchangeable and can be fixed at different angular positions, depending on which orifice 184 foreseen in their periphery, are selected for passing the pertinent immobilization screws to the laminar part 178.
  • pallet 163 is specially designed to lock soles 174 of any size number, simply changing the position of the fixture system 167, or else, the 168, in respect of one of the orifices 166 of the pallet, which operation is done very quickly and simply.
  • All the fixture systems of sole that are used can very easily and quickly put and remove the sole, and also have a decimal precision in fitting one and the other, so that the robot can carry out its programme repetitively and independently between the different pallets.
  • the different types of jobs that are being processed at the automated chain can be carried out on pallet 163, such as: cementing of the sole in its different forms, for example using gun, brush or spray; halogenating of the sole; surface modification system of the material (by laser or other similar techniques) instead of halogenating or roughing for better cementing; or the artificial vision system to convey the characteristics of the sole to the computer.
  • the pallet When some job is going to be carried out on the sole, by a robot, the pallet is locked by a fixture post, or stopping, which leaves it in a suitable place with decimal precision, for programmes to be repetitive and the robot to have its "zero" setting fixed.
  • the materials with which the pallets have been made have been minutely selected to perfectly withstand the movements and temperature changes of the production line and comply perfectly with their work.
  • the sole 174 is perfectly aligned in the suitable position, depending on the model that is used.
  • dismountable side walls 189 are coupled to the pallet 163 to prevent any surplus cement from emerging, as shown in the figure 37. These side walls 189 are fixed in the peripheral orifices 190 foreseen for this purpose in the base-plate 164 (see figure 36).
  • Reference 193 designates the pallets which are accessed with the footwear uppers 194, that are displaced by the cylinder 195 towards the conveyance post 196 to the loading post 191; this action is carried out by another cylinder 197 which provokes the rotary motion 90° around the vertical shaft 189.
  • the pallet which supports the stack of uppers 194 inside the loading station 191 has reference number 203 and when this is full it goes on to the conveyor and reactivating unit 192 where water steam enters via sprinklers 204.
  • this conveyor unit is complete, the storage dolly 205 is detached, where up to two hundred pairs can be kept at suitable temperature for lasted, and can also be conveyed comfortably and quickly to the utility station, which lies next to the machines for mounting crowns, heels and shanks.
  • each of the self-adhesive paper strips have been referenced as number 213, which are given to the clicker to stick on the clicking knife 214 (see figure 46), also facilitating the marking on this knife of any variances which will be determined by marks 208 to 212 of the edge of the upper of the footwear 194.
  • the codes of the size number 215; foot code (right or left) 216; model code 217, etc. are defined between reference points.
  • the code corresponding to the shoe model is kept invariable at the foot, only changing the binary code which identifies the size number 215.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP95905646A 1994-01-20 1995-01-20 Procede de fabrication automatique de chaussures, et installation correspondante Withdrawn EP0689778A1 (fr)

Applications Claiming Priority (19)

Application Number Priority Date Filing Date Title
ES9400109A ES2074964B1 (es) 1994-01-20 1994-01-20 Maquina automatica para pegar suelas de calzado.
ES9400109 1994-01-20
ES9400759A ES2111432B1 (es) 1994-04-11 1994-04-11 Palet individual de transporte de hormas para la fabricacion de calzado.
ES9400758 1994-04-11
ES9400759 1994-04-11
ES9400758 1994-04-11
ES9400965 1994-05-06
ES9400965 1994-05-06
ES9401298 1994-06-14
ES9401298A ES2109853B1 (es) 1994-06-14 1994-06-14 Proceso de fabricacion de calzado.
ES9401739 1994-08-03
ES9401739 1994-08-03
ES9500093 1995-01-19
ES9500095 1995-01-19
ES9500095 1995-01-19
ES9500094 1995-01-19
ES9500093 1995-01-19
ES9500094 1995-01-19
PCT/ES1995/000012 WO1995019719A1 (fr) 1994-01-20 1995-01-20 Procede de fabrication automatique de chaussures, et installation correspondante

Publications (1)

Publication Number Publication Date
EP0689778A1 true EP0689778A1 (fr) 1996-01-03

Family

ID=27576144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95905646A Withdrawn EP0689778A1 (fr) 1994-01-20 1995-01-20 Procede de fabrication automatique de chaussures, et installation correspondante

Country Status (2)

Country Link
EP (1) EP0689778A1 (fr)
WO (1) WO1995019719A1 (fr)

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WO1999056578A1 (fr) * 1998-04-30 1999-11-11 Fiorani S.N.C. Di Fiorani Alberico & C. Machine servant a etirer des dessus de chaussure et a les fixer aux semelles correspondantes
WO2000048543A1 (fr) * 1999-02-19 2000-08-24 The Procter & Gamble Company Dispositif servant a fabriquer des articles hygieniques
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EP1354528A1 (fr) * 2002-04-19 2003-10-22 Ciscal S.p.A Procédé de gradation d'une gamme de formes distribuées en une série de pointures à partir d'une forme de base et forme ainsi obtenue
US6692196B1 (en) 1999-02-19 2004-02-17 The Procter & Gamble Company Apparatus for manufacturing hygienic articles
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WO1999056578A1 (fr) * 1998-04-30 1999-11-11 Fiorani S.N.C. Di Fiorani Alberico & C. Machine servant a etirer des dessus de chaussure et a les fixer aux semelles correspondantes
WO2000048543A1 (fr) * 1999-02-19 2000-08-24 The Procter & Gamble Company Dispositif servant a fabriquer des articles hygieniques
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WO2001080679A1 (fr) 2000-04-26 2001-11-01 Torielli Rag. Pietro & C. S.P.A. Procede de manipulation et de transfert de formes de montage de chaussures
EP1354528A1 (fr) * 2002-04-19 2003-10-22 Ciscal S.p.A Procédé de gradation d'une gamme de formes distribuées en une série de pointures à partir d'une forme de base et forme ainsi obtenue
WO2003088778A2 (fr) * 2002-04-19 2003-10-30 Ciscal S.P.A. Procede de fabrication a l'echelle d'une serie de formes de chaussures repartie sur une serie de tailles a partir d'une forme de base et forme de chaussure ainsi obtenue
WO2003088778A3 (fr) * 2002-04-19 2003-12-24 Ciscal S P A Procede de fabrication a l'echelle d'une serie de formes de chaussures repartie sur une serie de tailles a partir d'une forme de base et forme de chaussure ainsi obtenue
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US10552551B2 (en) 2011-11-18 2020-02-04 Nike, Inc. Generation of tool paths for shore assembly
US10667581B2 (en) 2011-11-18 2020-06-02 Nike, Inc. Automated identification and assembly of shoe parts
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