WO1992008385A1 - Dispositif d'assemblage pour chaussures a semelles moulees - Google Patents

Dispositif d'assemblage pour chaussures a semelles moulees Download PDF

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Publication number
WO1992008385A1
WO1992008385A1 PCT/US1991/008059 US9108059W WO9208385A1 WO 1992008385 A1 WO1992008385 A1 WO 1992008385A1 US 9108059 W US9108059 W US 9108059W WO 9208385 A1 WO9208385 A1 WO 9208385A1
Authority
WO
WIPO (PCT)
Prior art keywords
last
strings
shoe
sole
bobbin
Prior art date
Application number
PCT/US1991/008059
Other languages
English (en)
Inventor
Howard Gonchar
Tom Nowak
Ray Wandel
Don Felter
Joe Goul
Original Assignee
Carter Footwear, Inc.
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
Application filed by Carter Footwear, Inc. filed Critical Carter Footwear, Inc.
Publication of WO1992008385A1 publication Critical patent/WO1992008385A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/06—Producing footwear having soles or heels formed and joined on to preformed uppers using a moulding technique, e.g. by injection moulding, pressing and vulcanising
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D21/00—Lasting machines
    • A43D21/003—Lasting machines with lasting strings, stretching straps or the like, for forming the shank portions of shoes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D3/00—Lasts
    • A43D3/10—Devices for removing lasts
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D9/00—Devices for binding the uppers upon the lasts

Definitions

  • the present invention relates to a device useful in the assembling of molded shoe soles to shoe uppers.
  • the present invention also relates to a method for using such a device.
  • a last string puller is known from U.S. Patent 3,778,856 (Christie et al) in which a bobbin is mounted on a fluid cylinder for pulling the last strings. There, the last strings are wound about the bobbin in such a way that they are tightly gripped by the bobbin. Upon retraction of the bobbin by a fluid motor, the last strings are pulled and tightened.
  • Applicant has discovered that a device which tightly grips the last strings and tightens the same is not practical on an industrial scale since it tends to break the last strings during tightening. The uppers having broken last strings must be removed from the last and discarded.
  • the last is rotated from the second position to a cooling position in which both it and the sole are permitted to cool.
  • a cooling position in which both it and the sole are permitted to cool.
  • the above and other objects are accomplished by a method for tightening the last strings of a shoe upper mounted on a last, in which the method includes the steps of positioning a bobbin of a string puller such that the last strings may be wound around the bobbin, winding the last strings around the bobbin, and moving the string puller in a direction parallel to the sole of the last such that the bobbin tightens the last strings, while manually gripping the ends of the last strings.
  • a method for pinning a shoe upper mounted on a last onto sole pins of the last includes the steps of grasping the upper by teeth mounted on a fluidic cylinder system, operating the fluidic cylinder system in a first operating step such that the teeth move toward one another. Simultaneously with the first operating step, the fluidic cylinder system is operated to raise the upper away from the last and over the last pins. After this second step, the fluidic cylinder system is operated to lower the upper toward the last after the upper has moved over the last pins. This results in the upper being pinned by the last pins.
  • a shoe last includes a last body having a toe portion, and internal flow circuit in the last body for passage of a cooling fluid, and means for selectively connecting the internal flow circuit to a source of high pressure gas.
  • a flow circuit outlet portion of the flow circuit is formed at the toe portion.
  • a method for molding a shoe sole on a shoe upper includes the steps of mounting the upper onto a last having an internal flow circuit for passage of a cooling fluid and molding a sole onto the upper mounted on the last.
  • the sole and last are cooled by flowing a cooling fluid through the circuit, after which the removal of the shoe from the last is aided by flowing a high pressure gas through the circuit and out of the outlet portion of the internal flow circuit.
  • Figure 1 is a front view of an apparatus according to the present invention.
  • Figure 2 is a side view of the apparatus of Figure i;
  • Figure 3 is a front view of the last string puller of the apparatus of Figure 1;
  • Figure 4 is a side view of the last string puller of Figure 3;
  • Figure 5 is a front view of one the pinning devices of Figure 1;
  • FIGS 6A-6C schematically show three phases of the operation of the pinner of Figure 5;
  • Figure 7 is a partial side view of the apparatus of Figure 2.
  • Figure 8 is a section through cut 8-8 in Figure 7. Best Mode for Carrying Out the Invention
  • a base 2 supports a lower mold 4 and a last support head 6.
  • the lower mold 4 is entirely conventional and will not be further described, beyond noting that it includes recesses for holding sole material, such as raw rubber, for soles to be mounted on the shoe uppers, as well as heating elements for curing the molded sole.
  • the last support head houses a motor (not shown) which may be a fluid motor which drives shafts 8 upon which the rotary bases 10 for the lasts are mounted.
  • the rotary basis each support, e.g., three last 12 which are angularly spaced from one another by 120°.
  • a fluid control system (not shown) for the motor mounted within the last head 6 controls the motor so as to sequentially rotate each of the lasts to a first position indicated as 12A in Figure 2, a second or molding position indicated as 12B in Figure 2, and a third or cooling position indicated as 12C in Figure 2.
  • the above construction is well known in the art and will not be described in detail herein.
  • a shoe upper is mounted to the last at the position 12 .
  • the shoe uppers are prefabricated with flaps that fit over the sole of the last.
  • the flaps contain last strings which must be pulled tightly for securing the shoe upper on the last with the flaps covering the last sole, in preparation for the sole being mounted on the shoe upper.
  • the present invention therefore incorporates a last string puller such as that shown in Figures 3 and 4.
  • a last string pulling motor 16 For each last rotating base 10, there is provided a last string pulling motor 16.
  • Each last string pulling motor 16 includes a pneumatic cylinder 18 mounted to the last support head 6 and having a rod 20.
  • a bobbin bracket 22 is mounted to the end of the rod 20.
  • the bracket 22 may be formed of L-shaped stock having smoothly rounded ends 24 and 26.
  • On one face of the bracket is mounted a bobbin 28.
  • the bobbin 28 may be cylindrical, but may also have the illustrated hour-glass shape or any other shape which aids in the retention of the string thereon.
  • Bracket 22 can be moved by the cylinder 18 between a retracted position 22A, an intermediate position 22B and an extended position 22C.
  • the control of pneumatic pressure to the pneumatic cylinder 18 is applied by the foot pedal air valves 24 ( Figures 1 and 2) . Pressing on one of the foot pedal air valves applies lower pressure compressed air to the cylinder 18 for advancing the bracket to the intermediate position 22B, while pressing on the other of the foot pedal air valves 24 applies higher pressure compressed air to the cylinder 18 for advancing the bracket to the extended position 22C.
  • the air cylinder 18 is oriented so that the rod 20 thereof extends in a direction substantially parallel to the sole of the last in the position 12A.
  • the shoe upper 30 is first mounted on to the last 12 while in the position 12A. Subsequently, an actuation of the appropriate foot pedal air valve causes the air cylinder 18 to advance the bracket 22 from the retracted position 22A to the intermediate position 22B. The last strings 32 are then loosely wound about the bobbin 28 one or two times in preparation for tightening. Subsequently, foot actuation of the appropriate foot pedal air valve 24 applies higher pressure air to the cylinder 18 for causing the bracket to be advanced from the intermediate position 22B to the extended position 22C. As this occurs, the last strings 32 tighten around the rounded end 26 of the bracket, and also around the bobbin 28.
  • a critical feature of the present invention is that the maximum pulling force on the last strings is modulated by manually modulating the gripping tension on the ends of the last strings as the bracket 22 moves from the intermediate position 22B to the extended position 22C It is well understood that the frictional force between the last strings and the bracket end 26 and bobbin 28 is related to and the string tension. Thus, if one simply loosely winds the last strings once about the bobbin 28 and releases the last strings prior to the advance of the bracket 22 to the extended position 22C, the last strings will not be tightened.
  • the operator only winds the last strings about the bobbin 28 by one or two turns.
  • the operator retains manual tension on the ends of the last strings 32.
  • the operator can hold the last strings between the thumb and first finger, and modulate the manual gripping tension by adjusting the pressure between the thumb and first finger.
  • the bracket 22 is advanced to the extended position 22C, the degree by which the last strings are tightened on the bobbin is a function of the manually modulated gripping tension at the ends of the last strings.
  • the frictional gripping force of the bobbin 28 and bracket edge 26 on the last strings is a function of such string tightening.
  • This procedure can be repeatedly performed on an industrial scale with reduced risk of injury to the operator, since the pulling tension is applied by the air cylinder 18, and not by the operator; rather than supplying pulling tension, the operator simply modulates the limit of string tension.
  • a pinner jaw 36 is supported on an adjustable base 38 mounted to the base 2 ( Figure 5) .
  • Each adjustable base can be of a conventional construction and comprise a case supporting a pair of perpendicular advancing screws having handles 40 and 42 for adjusting pinner arm 44 mounted on the adjustable base in two orthogonal directions.
  • a further pinner arm 46 is pivoted to the top of the pinner arm 44.
  • a pinner arm cylinder 48 has a lower end mounted to the pinner arm 44. The cylinder rod thereof is pivoted to the pinner arm 46 so that cylinder 48 can pivot the pinner arm 46 to raise and lower the same.
  • a pinner jaw clamping cylinder 50 which supports a pair of pinning teeth 52.
  • One of the pinning teeth is mounted directly to the cylinder 50 while the other is mounted to the rod thereof, so that the spacing between the pinning teeth 52 toward one another can be adjusted.
  • the pinner arm 46 also supports a pinner lifting cylinder 54.
  • the rod of the pinner lifting cylinder 54 supports a sole block 56 having guide structure 58.
  • Fluid conduits such as 60 provide pressurized air to the cylinders 48, 50 and 54 for operating the same according to a predetermined control sequence.
  • the control circuitry may be entirely conventional and preferably comprises solenoid operated valves for each of the cylinders 48, 50 and 54, timing of each of the solenoid operated valves being controlled by a programmed general purpose controller (not shown) .
  • the base 38 is adjusted to the specific dimensions of the last and last pins associated therewith.
  • pinner arm 46 Prior to the placement of the shoe upper on the last, pinner arm 46 is kept retracted by the cylinder 48 to the position shown in Figure 1, so that it does not interfere with the last string pulling sequence described above.
  • the cylinder 48 is operated to lower the pinner arm 46 to the position shown in Figure 5.
  • the cylinder 50 is operated to advance the pinner teeth 52 toward one another so that they are able to hook upper in the region of the last strings in preparation for subsequent operations.
  • the pinner lifting cylinder 54 is operated to lower the sole plate 56 onto the last sole and press downward onto the last sole.
  • the resulting reaction force slightly raises the pinner arm 46 and the pinner teeth 52 mounted thereto, while pushing down on the last.
  • Further contraction of the cylinder 50 causes the pinner teeth to move further toward one another ( Figure 6B) so that the upper is raised up, and hooked over, the last pins 34.
  • the hooking operation has now been completed and the pinner teeth can be separated while releasing the pressure on the sole plate 56 ( Figure 6C) .
  • the arm 46 can then be raised to the position of Figure 1.
  • the sole having the shoe upper mounted thereon and hooked over the last pins 34, is then rotated to the position of 12B where a conventional molding operation takes place. Following molding, the last is rotated to the position 12C for cooling.
  • the lasts have internal cooling circuits 70 and 72.
  • the circuit 70 applies cooling fluid to the last heel while the circuit 72 extends parallel to the last sole and forward to the last toe.
  • a heel outlet for the cooling circuit 70 is normally closed by a spring loaded plunger 72 while the last circuit 72 terminates at a toe orifice 76 which is normally open.
  • a groove 78 communicates with the toe orifice 76 and extends along the toe to provide a passage for the cooling fluid which exits the toe orifice 76.
  • Each of the cooling circuits 70 connects to a fluid hose 80 at connection 82.
  • the fluid hoses in turn connect to a rotary valve 84 which selectively supplies cooling fluid to the hoses 80 as a function of the rotary position of the last.
  • the rotary valve 84 can comprise a stationary disc 86 mounted concentric with the shaft 8, and on an extension 87 of the last support 10.
  • the hoses 80 connect to the rotating extension 87 at angular positions separated by 120°.
  • the extension 87 has a flange 89 which forms a rotary joint to hold the disc 86 for rotation on the extension 87.
  • a high pressure line 88 and a low pressure line 90 connect to the disc 86 so that the low pressure line 90 is in communication with the hose 80 for the last in position 12C while the high pressure line 88 is in communication with the hose 80 for the last just before it reaches the position 12A.
  • Low pressure air in the line 90 is cooled and humidified in the in line water filled oiler 92.
  • the cooled and humidified air then passes through the line 90 to the hose 80 for the last 12C via the rotary valve 84 and ultimately reaches the cooling circuit 70 of that last.
  • the pressure of the low pressure air is insufficient to open the valve 74, and so the cooling air flows through the cooling circuits 70 and 72, and exits the toe orifice 76 for cooling the last.
  • the pressure of the air in the line 90 should initially be very low so as to prevent the air pressure from popping the still soft sole off of the upper. The air pressure can then gradually increase to promote rapid cooling.
  • the conduit 80 for that last is briefly rotated into intercommunication with the high pressure air line 88 just before the last reaches position 12A.
  • the high pressure air therefrom enters the cooling circuits 70 and 72 and opens the plunger valve 74.
  • the high pressure air exiting the plunger valve and the toe orifice provide a pneumatic assist for the operator in removing the shoe from the last.

Abstract

Afin de resserrer les cordons (32) de forme d'une tige (30) de soulier montée sur une forme (12), on enroule les cordons (32) sur une bobine (28) montée de manière à se déplacer en un sens parallèle à la semelle de forme. L'opérateur agrippe manuellement les extrémités des cordons (32) de la forme, alors que la bobine (28) est déplacée, de manière à resserrer les cordons (32), et module la tension de serrage manuel sur les extrémités des cordons (32) de sorte que la force de frottement entre les cordons (32) et la bobine (28) est maintenue à un niveau tel que les cordons (32) ne sont pas brisés. Des dents (52) de fixation montées sur un système de cylindre à fluide fixent ensuite la tige à la semelle sur des pointes (52) de forme. Après que la semelle soit moulée sur la tige (30), le circuit de refroidissement (70) de forme fournit de l'air sous haute pression au bout de la forme afin d'aider à enlever la chaussure de la forme (12).
PCT/US1991/008059 1990-11-09 1991-11-06 Dispositif d'assemblage pour chaussures a semelles moulees WO1992008385A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61108590A 1990-11-09 1990-11-09
US611,085 1990-11-09

Publications (1)

Publication Number Publication Date
WO1992008385A1 true WO1992008385A1 (fr) 1992-05-29

Family

ID=24447564

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/008059 WO1992008385A1 (fr) 1990-11-09 1991-11-06 Dispositif d'assemblage pour chaussures a semelles moulees

Country Status (5)

Country Link
EP (1) EP0510171A4 (fr)
AU (1) AU9085391A (fr)
CA (1) CA2073514A1 (fr)
MX (1) MX9101967A (fr)
WO (1) WO1992008385A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0993785A1 (fr) * 1998-09-21 2000-04-19 OFFICINE MECCANICHE MOLINA & BIANCHI S.p.A. Support de forme pour machines d'assemblage préalable
CN107920631A (zh) * 2015-06-09 2018-04-17 I.S.A科技及自动化产业有限公司 鞋面安装机及缝纫装置
EP3308668A4 (fr) * 2015-06-09 2019-03-06 I.S.A. Indústria De Tecnologia E Automação LTDA - EPP Machine pour le montage d'une empeigne de chaussure avec moyen de traction de cordons

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110495680B (zh) * 2019-08-19 2021-03-26 燕山大学 一种全功能自动化脱楦机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US236218A (en) * 1881-01-04 Lasting-machine
US919418A (en) * 1905-04-11 1909-04-27 Joseph Dominique Castellani Lasting device.
US1833229A (en) * 1930-01-29 1931-11-24 Sahr Frank Machine for lasting shoes
US3788856A (en) * 1967-09-28 1974-01-29 Agfa Gevaert Nv Plural coated sheet material containing photosensitive semiconductive particles
US3972086A (en) * 1974-06-21 1976-08-03 Luciano Belli Machine for assembling shoe uppers directly on assembly forms

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1069300A (fr) * 1952-08-08 1954-07-06 Schon & Co G M B H Dispositif pour la mise sur forme du dessus des chaussures
US4031586A (en) * 1974-05-09 1977-06-28 Von Den Benken Elisabeth Insole for footwear
US4184219A (en) * 1978-08-10 1980-01-22 International Shoe Machine Corporation Method of stretching an upper about the vamp of a last

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US236218A (en) * 1881-01-04 Lasting-machine
US919418A (en) * 1905-04-11 1909-04-27 Joseph Dominique Castellani Lasting device.
US1833229A (en) * 1930-01-29 1931-11-24 Sahr Frank Machine for lasting shoes
US3788856A (en) * 1967-09-28 1974-01-29 Agfa Gevaert Nv Plural coated sheet material containing photosensitive semiconductive particles
US3972086A (en) * 1974-06-21 1976-08-03 Luciano Belli Machine for assembling shoe uppers directly on assembly forms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0510171A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0993785A1 (fr) * 1998-09-21 2000-04-19 OFFICINE MECCANICHE MOLINA & BIANCHI S.p.A. Support de forme pour machines d'assemblage préalable
CN107920631A (zh) * 2015-06-09 2018-04-17 I.S.A科技及自动化产业有限公司 鞋面安装机及缝纫装置
EP3308668A4 (fr) * 2015-06-09 2019-03-06 I.S.A. Indústria De Tecnologia E Automação LTDA - EPP Machine pour le montage d'une empeigne de chaussure avec moyen de traction de cordons
CN107920631B (zh) * 2015-06-09 2022-02-25 I.S.A科技及自动化产业有限公司 含鞋面拉帮装置的鞋面安装机

Also Published As

Publication number Publication date
AU9085391A (en) 1992-06-11
EP0510171A1 (fr) 1992-10-28
CA2073514A1 (fr) 1992-05-10
MX9101967A (es) 1992-06-01
EP0510171A4 (en) 1993-07-28

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