WO1995028105A1 - Degrossissage progressif des parties marginales d'une semelle de chaussure - Google Patents

Degrossissage progressif des parties marginales d'une semelle de chaussure Download PDF

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Publication number
WO1995028105A1
WO1995028105A1 PCT/GB1995/000812 GB9500812W WO9528105A1 WO 1995028105 A1 WO1995028105 A1 WO 1995028105A1 GB 9500812 W GB9500812 W GB 9500812W WO 9528105 A1 WO9528105 A1 WO 9528105A1
Authority
WO
WIPO (PCT)
Prior art keywords
shoe
brush
region
shoe bottom
tool
Prior art date
Application number
PCT/GB1995/000812
Other languages
English (en)
Inventor
Terence John Brown
John Davies
Paul David Stabler
Original Assignee
British United Shoe Machinery Limited
Usm Espana, S.L.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB9407427A external-priority patent/GB9407427D0/en
Application filed by British United Shoe Machinery Limited, Usm Espana, S.L. filed Critical British United Shoe Machinery Limited
Priority to EP95915236A priority Critical patent/EP0804104A1/fr
Publication of WO1995028105A1 publication Critical patent/WO1995028105A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D37/00—Machines for roughening soles or other shoe parts preparatory to gluing

Definitions

  • TECHNICAL FIELD This invention is concerned with improvements in or relating to a method of progressively roughing marginal portions of a shoe bottom using a rotary radial roughing brush and also in or relating to machines for carrying out such a method.
  • an automatic shoe bottom roughing machine comprising a shoe support for supporting a lasted shoe with marginal portions of the bottom thereof to be roughed exposed, tool supporting means for supporting a rotary radial roughing brush, first, second and third drive means for effecting relative movement between the shoe support and tool supporting means, in directions extending respectively lengthwise, widthwise and heightwise of the bottom of the shoe to be roughed whereby the brush supported by the tool supporting means is caused to operate progressively along the marginal portions of the shoe bottom, and means for effecting rotation of the brush, wherein the tool supporting means supports the brush for swivelling movement about an axis of swivel extending heightwise of the shoe bottom in a fixed angular relationship with the direction of relative lengthwise movement between the shoe support and the tool supporting means, fourth drive means being provided for effecting such swivel movement.
  • the first, second and third drive means are controlled by means of an optical reader which follows the profile of a reference template corresponding to the profile of the shoe bottom to be roughed.
  • the operation of the fourth drive means is controlled in such a manner that thebrushes remain constantly perpendicular to the edge of the shoe last, the control of the angular position of the roughing brush being effected by a position-sensing block by which signals are transmitted to the fourth drive means.
  • the axis of swivel extends vertically of the direction of relative lengthwise movement between the shoe support and the tool supporting means so that, especially in the case of a high-heeled shoe, the brush, in being maintained perpendicular to the shoe bottom edge, is presented at a significant angle to the shoe bottom, especially in the waist region of the shoe bottom.
  • the full width of the operating surface portion of the brush may not contact the shoe bottom, or it will be necessary to apply relatively heavy roughing pressure in order to deform the brush thus to achieve contact between it over its full width and the shoe bottom.
  • the radial roughing brush is mounted on a sub-frame, forming part of the tool supporting means, which is mounted for pivotal movement about an axis extending transversely of the shoe bottom such that the plane in which the operating surface portion of the brush lies is maintained normal, or substantially normal, to the marginal portion of the shoe bottom being roughed thereby.
  • the provision of means for effecting such "tilting" movement of the brush does of course involve a more complicated structure, in so far as a pivotal sub- frame has to be provided, together with an extra motor, so that the cost of such a machine is increased.
  • the brush is not mounted for swivelling movement in this case, again it does not always accommodate to the shoe bottom contour which. especially in the joint region of a high-heeled shoe, is relatively complicated.
  • the invention thus provides, in one of its several aspects, a method of progressively roughing marginal portions of a shoe bottom using a rotary radial roughing brush, characterised in that at least along the inside waist region of such shoe bottom at the heelward side of the joint thereof a longitudinal centre line of the region of contact between the operating (i.e. shoe bottom-contacting) surface portion of the brush and the shoe bottom marginal portion being roughed subtends an acute angle with the perpendicular to the tangent to the shoe edge for each position of such contact, and in that the region of contact is located on the joint-ward side of the perpendicular.
  • the invention further provides, in another of its several aspects, a method of progressively roughing marginal portions of a shoe bottom using a rotary radial roughing brush, characterised in that at least in the regions of such shoe bottom immediately “downstream” and “upstream” of the joint of the shoe bottom a longitudinal centre line of the region of contact between the operating (i.e.
  • shoe bottom- contacting) surface portion of the brush and the shoe bottom marginal portion being roughed subtends an acute angle with the perpendicular to the tangent to the shoe edge for each position of such contact, and in that both downstream and upstream of the joint region the region of contact is located on the joint-ward side of the perpendicular, said longitudinal centre line passing through the perpendicular as the roughing operation progresses from the downstream to the upstream region and vice versa.
  • said longitudinal centre line subtends an acute angle with said perpendicular along the whole of the side portions of the shoe bottom in the heel seat and waist regions thereof, with the longitudinal centre line located at the joint- ward side of the perpendicular.
  • said centre line lies coincident with the perpendicular during the roughing of the shoe bottom in the backseam region thereof.
  • said longitudinal centre line subtends an acute angle with said perpendicular along the whole of the side portions of the shoe bottom in the forepart region thereof, with the longitudinal centre line located at the joint-ward side of the perpendicular.
  • the longitudinal centre line passes through the perpendicular during the roughing of the marginal portion of the shoe bottom in the toe end region thereof.
  • the invention further provides, in another of its several aspects, a machine for use in carrying out a method as referred to above, said machine comprising a shoe support for supporting a lasted shoe with marginal portions of the bottom thereof to be roughed exposed, tool supporting means for supporting a rotary radial roughing brush, first, second and, third drive means operable in accordance with a programmed instruction for effecting relative movement between the shoe support and tool supporting means, in directions extending respectively lengthwise, widthwise and heightwise of the bottom of the shoe to be roughed whereby the brush supported by the tool supporting means is caused to operate progressively along the marginal portions of the shoe bottom, and means for effecting rotation of the brush, wherein the tool supporting means supports the brush for swivelling movement about an axis of swivel extending heightwise of the shoe bottom in a fixed angular relationship with the direction of relative lengthwise movement between the shoe support and the tool supporting means, fourth drive means being provided for effecting such swivel movement, said machine having an operating mode
  • the operator can satisfy himself, while digitising a model shoe, as to the optimum angle of swivel of the brush for any given position and the "swivel" information is then stored together with the three-axis information to form a pattern data file for subsequent recall.
  • the axis of swivel of the roughing brush is maintained in the aforementioned fixed angular relationship, regardless of widthwise and heightwise movement, in that the tool supporting means comprises a first parallel linkage arrangement through which movement of the tool widthwise relative to the shoe support can be effected by the second drive means and a second parallel linkage arrangement through which movement of the tool heightwise relative to the shoe support can be effected by the third drive means, said arrangements supporting a tool support member by which the tool is supported for swivelling movement about the axis of swivel.
  • the axis of swivel extends perpendicularly to the direction of lengthwise relative movement between the shoe support and the tool supporting means.
  • Fig. 1 is a side view of the machine in accordance with the invention
  • Fig. 2 is a plan view of the machine of Fig. 1;
  • Fig. 3 is a section view taken on the line III- III of Fig. 1, showing various motors and other features of drive means of the machine;
  • Fig. 4 is a fragmentary front view of the machine, showing details of a rotary roughing brush and its mounting;
  • Fig. 5 is a fragmentary side view of a rearward end of the shoe support, showing details of tool datum setting means; and Fig. 6 is a diagrammatic view of a shoe bottom. showing the angle of presentation (angle of swivel) of the operating surface portion of the roughing brush in relation to a perpendicular to the tangent to the shoe edge for various positions of the brush.
  • a shoe S In carrying out the method in accordance with the invention (hereinafter "the illustrative method"), a shoe S, supported bottom uppermost with marginal portions of the bottom thereof exposed, is presented to a rotary radial roughing brush which is then caused to operate progressively along the shoe bottom marginal portions either by moving the shoe relative to the brush or the brush relative to the shoe.
  • a rotary radial roughing brush which is then caused to operate progressively along the shoe bottom marginal portions either by moving the shoe relative to the brush or the brush relative to the shoe.
  • the operating surface portion of the brush can be maintained in contact over its whole width with the shoe bottom marginal portion more reliably, without the need for excessive deforming pressure being applied; - it has always been considered desirable that the direction of rotation of the brush effects an inwiping movement over the marginal portion of the shoe bottom being roughed and in the past it has been considered desirable that this direction should lie perpendicular to the tangent to the shoe edge.
  • the brush is less likely to engage any metallic shank Sh located in the waist region of the shoe bottom. Moreover, since any such engagement is at an angle, it is less likely to be detrimental whether to the roughing brush or to the shank itself.
  • the operating surface portion of the brush is first brought into engagement with the marginal portion of the shoe bottom at PI in the region of the heel breast line, at the inside waist of the shoe, and the roughing operation then takes place progressively towards the joint region with the region of contact maintained at an acute angle to the perpendicular (N1,N2...N28) to the tangent to the shoe edge during such operation. It has been found that the steeper the spring of the last (i.e. the pitch of the waist region in relation to the forepart region), the greater the sub-tended angle of presentation should be. In the region of the joint itself, the brush must be swivelled through a significant angle over a relatively short distance; this can clearly be seen in Fig. 6.
  • the machine now to be described (hereinafter called “the illustrative machine") comprises a shoe support generally designated 10 and tool supporting means generally designated 12, the shoe support being mounted for rectilinear movement, in a direction extending lengthwise of the bottom of a shoe supported thereby, in a frame 14 of the machine, and the tool supporting means being carried on said frame, as will be hereinafter described.
  • the shoe support 10 of the illustrative machine is generally similar to the shoe support described in GB-A-2,077,090 and is thus arranged to support a shoe, bottom up, with marginal portions of the shoe bottom to e operated upon exposed.
  • the shoe support 10 is mounted for sliding movement, along a rectilinear path, along two shafts 16 supported by the frame 14. More particularly, a frame 18 of the shoe support is mounted on blocks 20 for such sliding movement.
  • the left-hand block 16 (viewing Fig. 3), moreover, has depending therefrom a clamp 22 which clampingly engages a belt 24 entrained about two pulleys 26, at opposite ends of the path of travel of the shoe support 10.
  • one of the pulleys 26 is driven by a belt 28 which is entrained about a drive pulley 30 supported on an output shaft 32 of a stepping motor 34 mounted on the machine frame 14.
  • the stepping motor 34 constitutes first drive means of the illustrative machine, for effecting movement of the shoe support 10 relative to the tool supporting means 12 in a direction extending lengthwise of the bottom of a shoe supported by the shoe support.
  • the tool supporting means 12 comprises a base 40 which is fixedly mounted on a frame 14. Upstanding from the base 40, moreover, are two support members 42, arranged one at each side of the path of movement of the shoe support. Mounted at 54 for pivotal movement on and extending between the support members 42 is a cross- member 44 at each end of which, adjacent the appropriate support member 42, a forwardly extending arm 46 is mounted at 52 for pivotal movement in a direction extending widthwise of the path of movement of the shoe support 10. Interconnecting the forward ends of the two arms 46, furthermore, by ball joints 48 is a tool support member 50, in the form of a casting having a generally planar top surface.
  • the cross-member 44, arms 46 and tool upport member 50 constitute a first parallel linkage arrangement of the illustrative machine, facilitating movement of the tool support member 50 in a direction extending widthwise of the path of movement of the shoe support 10, and thus of the bottom of a shoe supported thereby.
  • each support member 42 At the base of each support member 42, and extending inwardly therefrom, is a flange 56 on which is supported, by means of a ball joint a rearward end of a second forwardly extending arm 58; each arm 58 extends parallel to its associated arm 46, and the forward end of each of the arms 56 is connected, again by ball joint, to a depending lug portion 60 on the tool support member 50.
  • Each support member 42, together with the arms 46, 58 and depending lug portion 60 thus constitutes a set of parallel linkages for supporting the tool support plate 50, the two sets (i.e.
  • the illustrative machine comprises a stepping motor 66, constituting second drive means of the illustrative machine, said motor being mounted between two brackets 68 secured to the cross-member 44.
  • a nut (not shown) captive in a housing 70 secured to a rearward portion of the left-hand (viewing Fig. 3) arm 46 by means of a pin 72.
  • the nut engages with a ball screw 74 whereby rotation of the output shaft is effective to pivot the arm 46, and thus the first parallel linkage arrangement, about the pivot 52 by which the arms 46 are secured to the cross-member 44.
  • a ball screw 74 On an end of the ball screw, moreover, is mounted a sleeve 76, an end portion of which describes a spiral.
  • This sleeve cooperates with a proximity switch 78 and serves as a homing device whereby, in a setting-up operation of the machine, the first parallel linkage arrangement is centralised by operation of the motor 66 to bring the sleeve 76 to a desired position in relation to the proximity switch 78.
  • a further stepping, motor 84 (constituting third drive means of the illustrative machine) by which the cross-member 44 is caused to pivot about the pivots 54 by which it is mounted on the support arms 42, whereby through the second linkage arrangement to effect heightwise movement of the tool support member 50 in relation to the shoe support 10.
  • an output shaft of the motor 84 is constituted by a ball screw 86 with which a nut (not shown) engages, the nut being housed captive in housing 88 secured between two brackets 90 extending forwardly of the cross-member 44. Rotation of the motor 84 is thus effective to move the housing 88 heightwise, thus to pivot the cross-member.
  • a sleeve 92 having a spiral end, said sleeve cooperating with a proximity switch 94 whereby, in a setting-up operation, to return the second parallel linkage to a "home" position.
  • compensating springs 98 are secured to further brackets 100 carried on the cross-member and also to the base 40 of the tool supporting means 12.
  • a rotary roughing tool 698 mounted on the tool support member 50 of the illustrative machine is a rotary roughing tool 698 in the form of a radial wire brush, tool driving means being provided for effecting rotation of the brush as will now be described.
  • the tool driving means of the illustrative machine comprises a motor 110 which is carried by a motor support member 112 which is pivotally mounted on a rod 114 supported at opposite ends on brackets 116 carried on the left-hand (viewing Fig. 3) flange 56 of the support member 42.
  • the motor is thus capable of heightwise pivotal movement about the axis of the shaft 114.
  • a rearwardly extending output shaft of the motor 110 carries a toothed drive pulley 120 about which a continuous belt 122 is entrained. It will thus be appreciated that the motor support member 112, and thus the motor 110 itself, is held suspended through the pulley 120 for pivotal movement about the axis of the rod 114; this thus maintains the drive belt 122 in tension.
  • a piston- and-cylinder arrangement 118 is mounted on the cross- member 44 and acts on the member 112 to apply a constant downward pressure thereto.
  • each further pulley 124 is mounted such that a tangent to the drive surface thereof coincides with a tangent to the drive surface of the drive pulley 120. It will be appreciated that, as the tool support member 50 is moved heightwise, a foreshortening effect of the further pulleys 124 will take place, because they are located behind the pivots 54.
  • the latter is wide in relation to the width of the belt to accommodate for any lengthwise movement of the belt over its surface in response to any corresponding movement of the further pulleys 124.
  • each of the further pulleys 124 are each mounted on a bracket 126, and each bracket is mounted, independently of the other, for pivotal movement about a pivot 128 carried on a flange formed on the rear of the cross-member 44.
  • the two further pulleys 124 thus constitute belt-aligning means of the tool driving means.
  • Pivotal movement of the brackets 126 is effected in a self- compensating manner according to the direction in which the reaches of the belt 122 extend towards the tool support member 50, as it is moved widthwise of the path of the shoe support 10.
  • a bearing block 672 within which is accommodated, for rotation relative thereto, a hollow shaft 674 carrying pulleys 676, 678 at its top and bottom.
  • the hollow shaft 674 itself also provides a bearing for a further shaft 680 which carries at its lower end a tool carrier 682 in the form of a metal block having generally the shape of an inverted L.
  • the tool carrier 682 can pivot about the axis of the shaft 680, as will be described hereinafter.
  • a pulley 700 is mounted on the shaft 696 and connected by a timing belt 702 to a further pulley 704 mounted for rotation about the axis of the pivot 694.
  • the pulley 704 is a double pulley and a further timing belt 708 passes thereover and over two angled pulleys 710, 712 and finally about the lower pulley 678 on the shaft 674.
  • the belt 122 driven by the motor 110 is entrained about the upper pulley 676 so that operation of the motor, in the operation of the illustrative machine, is effective, through the various pulleys and belts, to cause the tool 698 to be rotated about the axis of the shaft 686, thus to present a rotating operating surface portion to the bottom of a shoe supported by the shoe support 10.
  • belt-aligning means is also provided adjacent the pulley 676 in order to accommodate to widthwise movement of the tool support member 50, said belt-aligning means comprising two rollers 130 rotatable about a common axis, the rollers having smooth surfaces which run on the back of the timing belt 122.
  • the rollers 130 are mounted on a common bracket 132 which is mounted for pivotal movement about a pin 134 carried by the tool support member 50.
  • the rollers 130 serve to hold the forward end of the belt in alignment with the pulley 676 and are sufficiently wide to ensure that the belt is constantly in engagement therewith, regardless of the widthwise movement of the tool support member.
  • Maintaining the belt in the same plane as the pulley 676 also maintains the belt aligned regardless of the heightwise position of the tool support member.
  • the front belt-aligning means it has been found desirable positively to cause pivotal movement of the rollers to take place about the pivot 134 as widthwise movement of the tool support member 50 takes place and to this end a link 136 is pivotally connected at one end to the bracket 132 and at the other to a forward portion of the left-hand (viewing Fig. 3) arm 46.
  • the bracket 132 and thus the rollers 130 are pivoted also.
  • the tool carrier 682 is mounted for pivotal movement about the axis of the shaft 680 (Fig. 4), and indeed the tool is thus mounted for swivelling movement about said axis.
  • a pulley 684 is mounted at the upper end of the shaft 680 and is connected by a timing belt 686 to a further pulley (not shown) supported on a stub shaft 140 on the tool support member 50.
  • a further pulley 142 Also mounted on the stub shaft is a further pulley 142 connected by a timing belt 144 to a drive pulley 146 on the output shaft of a further stepping motor 148.
  • This latter motor which constitutes fourth driving means of the illustrative machine, is also carried by the tool support member 50.
  • setting means comprising a further shaft 716 accommodated within the shaft 680, which is hollow for the purpose.
  • the shaft 716 which in the normal operation of the machine thus rotates with the shaft 680, carries at its lower end a block 718 supporting an abutment pin 720.
  • the pin 720 projects from the block 718 and is accommodated in a slot 722 formed at the upper end of a link 724 pivotally carried at its lower end on the tool mounting 692.
  • the slot 722 thus determines the limits of pivotal movement of the lever 692 and thus of the heightwise position of the brush 698 in relation to the pin 720, and thus to the tool carrier 682. It will of course be appreciated that, when the machine is in a rest condition, the link 724 will rest with the upper end of its slot abutting the pin 720, thereby determining the lowermost position of the brush, and in the operation of the machine, when the brush is operating on a shoe bottom, it will be able to "float" relative to the tool carrier 682 within the confines of the slot 722.
  • the tool mounting 692 is urged downwards by a pneumatic cylinder 730 which is mounted on the tool carrier 682 and a piston rod of which is pivotally connected to a block 732 secured to the tool mounting 692.
  • the cylinder 730 also is effective to apply a predetermined pressure to the mounting 692, and thus to the tool 698.
  • a damper arrangement 734 is also supported by the tool carrier 682 and acts against the block 732.
  • the shaft 716 may also be hollow, carrying at its upper end and also at or adjacent its lower end suitable rotary couplings (only the upper one (736) of which is shown in Fig. 4) , for connection by pipelines (not shown) , respectively to a source of air under pressure and to the cylinder 730.
  • the connection to the cylinder 730 from the air source may be direct.
  • the shaft 716 is threaded with a thread of relatively large pitch.
  • This threaded portion carries a nut which is accommodated within the housing 688 and is provided with a hardened sleeve 742.
  • the nut rotates with the shaft 716 and thus with the shaft 680, but it is capable of being locked against such rotation, as will now be described.
  • the shank of the nut and the sleeve 742 project into a portion of the housing which is rotatably held by the bracket 690.
  • That portion of the housing is cut away whereby, when the tool carrier is in a "park" position (described hereinafter), to allow access to the sleeve 742 by a plunger 744 actuated by a diaphragm cylinder 746 carried on the bracket 690.
  • the effect of locking the nut 740 while the shaft 680 is being rotated together with the shaft 716 is thus to cause the shaft 716 to move heightwise relative to the nut 740 now locked against rotation, and in this way the heightwise position of the pin 720 is thus varied in relation to the tool carrier 682.
  • This therefore has the effect of varying the heightwise position of the upper and lower limits of movement of the tool mounting 692, and thus of the brush 698, in relation to the tool carrier 682.
  • the rotation of the shaft 680 is under control of the stepping motor 148, it will be appreciated that the movement of the abutment pin 720 can thus be accurately controlled.
  • the heightwise position of the tool is established in the following manner: firstly the cylinder 746 is operated to lock the nut 740 against rotation and the drive motor for rotating the shaft 680 is then operated to cause the block 718, and thus the abutment pin 720 therewith, to be raised to an uppermost limit position which is determined by a proximity switch 750 carried on the bracket 690.
  • the proximity switch senses the presence of a shoulder 752 on a block 754 carried on the upper end of the shaft 761.
  • the "start" position of the tool is ascertained and can be stored in memory by the control means.
  • the uppermost position of the abutment 720 is known, it is then necessary to set the operating surface portion of the brush to a datum, according to the diameter of the brush, and to this end tool datum setting means is provided comprising a proximity switch 756 (Fig. 5) is provided at a right-hand (viewing Fig. 3) rearward end of the shoe support 10, into opposed relationship with which the brush is brought, by moving the tool support member 50 is moved widthwise of the shoe support 10, for a tool datum setting operation.
  • a leaf spring 758 is provided which is engageable by the roughing brush to urge it downwards towards the proximity switch, said spring also having a downwardly facing lip 760 by which the proximity switch is actuated.
  • the stepping motor 66 is first operated to move the tool support member 50 widthwise to bring the tool into opposed relationship with the proximity switch 756, and thereafter the cylinder 746 is actuated to lock the nut 740 against rotation and the stepping motor 148 of the fourth drive means is then operated to effective rotation of the shaft 680 as described above, thus to effect downward movement of the tool.
  • the shoe support 10 also supports, at a left- hand (viewing Fig. 5) rearward end, a grinding stone 766 into engagement with which the roughing brush 698 may be brought from time to time.
  • the motor 66 of the second drive means is effective first to bring the brush into a desired opposed relationship with the grinding stone, whereafter the brush is then again lowered through a predetermined distance under the action of the motor 148 for rotating the shaft 680 and with the nut 740 locked against rotation as aforesaid, generally in the same manner as for a tool datum setting operation.
  • the stone is mounted on a lever 768 supported by a pivot 770 on the shoe support 18.
  • the end of the lever remote from the pivot is pivotally connected to one arm of a ball crank lever 772 itself also pivotally mounted on the shoe support.
  • a manually operable adjustment screw 774 Operatively connected to the other arm is a manually operable adjustment screw 774, rotation of which thus effects, through the aforementioned linkage, heightwise movement of the stone 766.
  • a shoe is first mounted in the shoe support 10, bottom uppermost, with the heel end of the shoe rearwardly (i.e. facing away from the operator), the shoe then being clamped both lengthwise and widthwise, and the heel end thereof being centralised, as described in detail in GB-A-2,077,090.
  • the length of the shoe is "measured” and whether it is a left or a right is detected, again as described in the aforementioned GB specification.
  • the illustrative machine is provided with a control panel generally designated 160 by which the operator can select a programmed instruction according to the style of shoe to be operated upon.
  • the operator can initiate a cycle of operation of the machine and the roughing tool 698 is then caused to operate progressively around the marginal portion of the shoe bottom in order to rough it, the direction of rotation of the brush being such that it always "wipes" inwardly over the marginal portion of the shoe bottom being operated upon, and to this end the brush is caused to swivel about the axis 680 to maintain it in a desired angular relationship with the shoe bottom.
  • the particular angle at which the brush is oriented in any particular position is again controlled by the programmed instruction, as is also the particular pressure applied at any particular position and indeed the speed of rotation of the brush, all of which are variable during the operating cycle.
  • the machine For creating a programmed instruction, the machine has a path-determining mode in which the tool is moved under operator control to a succession of positions along the marginal portion of the shoe bottom and each position is then "taught" in terms of three coordinate axes (as described in detail in US-A-4,541,054), brush rotational speed and brush pressure (as described in detail in EP-A-0 511 814) and swivel angle (as will now be described) .
  • a succession of displays are exhibited on a display panel 162 of the control box 160, asking the operator in turn to indicate a value for each of the various settings; in addition cursor keys 164a,164b (which could otherwise be in the form of a joystick) are provided on the control box for effecting widthwise and heightwise movement of the tool under operator control, again as described in detail in US-A-4,541,054; these cursor and other keys are indicated generally at 164 in Fig. 2.
  • the operator utilises two directional keys 164c,164d according to the direction of rotation selected for re-orienting the brush about the axis of the shaft 680.
  • the file is also selected and the tool automatically follows the "taught" path, which is determined by the various "taught” points with an interpolated line therebetween; the angle of swivel of the tool is also determined by an interpolation between the "taught” angles of orientation.
  • a grading programme may also be provided by which the data in the file, including the data relating to the angle of swivel, is modified according to the length of the shoe as measured by the shoe support 10, and in addition the "Y-axis" values and also the data relating to the angle of swivel may be reversed so that the same pattern data file can be used for left and right shoes.

Abstract

Lors du dégrossissage des parties marginales d'une semelle de chaussure à l'aide d'une brosse de dégrossissage radiale rotative (698), l'angle de présentation de la partie de surface opérationnelle de la brosse par rapport à la partie marginale de semelle est tel qu'une ligne centrale longitudinale de la zone de contact forme un angle aigu avec la perpendiculaire à la tangente du bord de la chaussure pour toute position de cette brosse par rapport à la partie marginale de semelle de chaussure, la zone de contact se trouvant du côté de cette perpendiculaire tourné vers la jointure. Cette disposition est particulièrement utile dans la zone interne de la partie étroite, surtout du côté de cette partie étroite tourné vers le talon, mais elle sert de façon générale devant et derrière la zone de jointure de la semelle de chaussure. L'angle aigu varie notamment selon le pas de la zone étroite par rapport à la partie avant et c'est de préférence le technicien qui le choisit. Quand ce procédé est utilisé avec une machine, celle-ci présente de préférence un mode de détermination de trajet, permettant de numériser le trajet de la brosse le long de la semelle selon trois axes de coordonnées, ainsi qu'un angle de pivotement de brosse pouvant être déterminé sous forme de valeur numérique, les différentes valeurs numériques constituant un dossier de données de motifs qu'on peut rappeler.
PCT/GB1995/000812 1994-04-14 1995-04-10 Degrossissage progressif des parties marginales d'une semelle de chaussure WO1995028105A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95915236A EP0804104A1 (fr) 1994-04-14 1995-04-10 Degrossissage progressif des parties marginales d'une semelle de chaussure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9407427A GB9407427D0 (en) 1994-03-15 1994-04-14 Progressively roughing marginal portions of a shoe bottom
GB9407427.5 1994-04-14

Publications (1)

Publication Number Publication Date
WO1995028105A1 true WO1995028105A1 (fr) 1995-10-26

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WO (1) WO1995028105A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041808A1 (fr) * 1980-06-10 1981-12-16 British United Shoe Machinery Limited Détermination d'une ligne d'opération d'un outil sur une surface tridimensionnelle d'une pièce
FR2529763A1 (fr) * 1982-07-06 1984-01-13 Anver Machine automatisee pour le cardage de chaussure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041808A1 (fr) * 1980-06-10 1981-12-16 British United Shoe Machinery Limited Détermination d'une ligne d'opération d'un outil sur une surface tridimensionnelle d'une pièce
FR2529763A1 (fr) * 1982-07-06 1984-01-13 Anver Machine automatisee pour le cardage de chaussure

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