US3729758A - Toe-lasting machine - Google Patents

Toe-lasting machine Download PDF

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Publication number
US3729758A
US3729758A US00196480A US3729758DA US3729758A US 3729758 A US3729758 A US 3729758A US 00196480 A US00196480 A US 00196480A US 3729758D A US3729758D A US 3729758DA US 3729758 A US3729758 A US 3729758A
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Prior art keywords
carriage
toe
tuck
lasting machine
machine according
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Expired - Lifetime
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US00196480A
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English (en)
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H Schindler
T Loffler
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Individual
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D8/00—Machines for cutting, ornamenting, marking or otherwise working up shoe part blanks
    • A43D8/32—Working on edges or margins
    • A43D8/40—Working on edges or margins by folding, turning in or over, hammering

Definitions

  • Pirmasens Tilo Loffler, Gersbacherstr. 20, Pirmasens-Winzeln, both of Germany [22] Filed: Nov. 8, 1971 [21] Appl. No.: 196,480
  • ABSTRACT A toe-lasting machine having wipers or tuck-in devices for an upper leather of a shoe in a joint area of a last, wherein a large part of the adjusting operations of the tuck-in devices are automatic.
  • the toe-lasting machine includes a machine frame, a first carriage with a heel support, a second carriage with a wiper head and wipers, and a pair of support tuck-in devices.
  • the tuck-in devices are mounted on the second carriage.
  • An adjustable linkage system is supported on the first carriage and on the machine frame. The linkage system is set to serve as a limiting stop in cooperation with a detent associated with the second carriage which supports the tuck-in devices.
  • This invention relates to a toe-lasting machine having a carriage with a heel support, a carriage with a wiper head and wipers and with separate tuck-in means for the upper leather of a shoe in the joint area of the last.
  • this effect is achieved by providing that the carriage with the wiper head and wipers also serves as mount for the insertion or tuck-in means, and the length of the last is sensed from the heel support with the aid of an adjustable linkage system including a roller attached thereto, the linkage system being pivoted on the heel support carriage and on the machine frame, so that the roller is set to serve as a limiting stop in co-operation with a detent rigidly associated with that carriage on which are mounted the insertion means.
  • the inventive arrangement is made adjustable in that the joint pin on the roller-carrying lever can be set in different positions along a slot in the machine frame while the location of the pivoting support can be changed along a slot in that lever, and the stop-bar is slidably guided in the pivoting support and carries a setcollar adjustable therealong.
  • this spring together with its mount, is adjustable in axial direction of the carriage.
  • the wiper carrier is moved by means of a motor in a direction towards the last, it propels the carriage with the tuckin device against a bias of the spring, until the carriage detent comes into abutment against the roller serving as a limiting stop.
  • the wiper then continues its operative path alone while the carriage remains stationary.
  • the height adjustment of the tuck-in device, as well as of a pressure plate associated therewith in accordance with the invention, also takes place automatically; this is accomplished by means of a twin cylinder arrangement whose one piston causes the pressure plate to exert pressure against the upper leather in the joint area while the other piston carries the tuck-in device to within the joint area.
  • the twin cylinder ar rangement is supported by a lever so that it may pivot in perpendicular direction.
  • both the pressure plate and the insertion means come into their operating positions; the pivoting movement makes it possible for the tuck-in device to urge the leather against the last after tucking in the same.
  • the carrier arrangement for the tuck-in device and the plate have such a configuration that one piston rod carries a cross-piece with a forked member which secures it against torsional movement by abutting against the other piston rod, while the second rod is provided with a cross-piece which carries a cam groove which secures it against a torsional movement by being guided on the twincylinder housing.
  • FIG. 1 is a side view of the machine showing elements of the novel arrangement, in rest position;
  • FIG. 2 is a similar side view of the machine of FIG. I with the elements of the novel arrangement in operating position;
  • FIG. 3 is a top view of the machine showing part of the novel arrangement
  • FIG. 4 is a section along line I I of FIG. 3 with part of the arrangement in its initial position;
  • FIG. 5 is a section along line I I of FIG. 3 with pa of the arrangement in operating position;
  • FIG. 6 is a section along line II II of FIG. 3;
  • FIG. 7 is a section along line III III of FIG. 6.
  • FIGS. 1 to 3 The support of a toe-lasting machine is specifically identified by numeral 1 in FIGS. 1 to 3. At its front upper part it carries the inventive arrangement which will be described with specific referenceto FIG. 3 of the drawing. The arrangement has a largely symmetrical configuration. FIG. 3 shows its right-hand portion; its left-hand counterpart is substantially identical. The description which follows relates to one of the complimentary halves of the arrangement based on the inventron.
  • Wiper head 3 (shown best in FIGS. 6 and 7) slides in its guide means in. a direction towards last support 2 in both directions indicated by the arrows.
  • Wiper 4 is supported in cutter head 3; the latter, together with its wiper, is moved from its rest position indicated by a solidline into its operating position indicated by a dashed line by a piston-cylinder drive arrangement (not shown); the same drive arrangement returns it into its initial position.
  • Last 5 rests on its support 2.
  • a carriage 6 slides in longitudinal direction along guide-rail 1.
  • Carriage 6 possesses a side-member 6' extending laterally and outwardly and serving as a mount for a knurled-head hollow screw 7 which accommodates a spring 8 abutting against plug 9 and tappet 10 (see FIG. 6).
  • Tappet 10 is carried by a front plate 1 1 seated in the front portion of wiper head 3.
  • the wiper head 3 is moved by the piston-cylinder arrangement (not shown), its movement is transmitted to carriage 6 via tappet 10, spring 8 and hollow knurled-head screw 7.
  • the wiper head 3 can continue to advance by a certain distance against the bias of spring 8, thus compressing the latter.
  • Carriage 6 carries a bell-crank lever 13 on a pivot pin 12; one end of the bell crank lever 13 is engaged by a forked member 14 of piston rod 15 associated with a cylinder-piston unit 16, 17.
  • Piston 16 is energized in cylinder 17 by means of a pressure medium issuing out of one of the pressure lines 18 and 19.
  • the initial position of piston 16, and thus of lever 13, can be adjusted by means of a knurled screw 20 accommodated in shoulder of the forked piece 14.
  • the bell-crank lever 13 On a plate 13' the bell-crank lever 13 carries a twincylinder arrangement 21 having two cylinder bores 22, 23. Bore 22 accommodates a piston 24 having a connecting rod 25 whose forward extremity carries a crosspiece 26; the latter serves as a support for a guide-bar 26 which runs along the twin-cylinder arrangement (see FIGS. 4 and 5), and prevents a torsional movement of connecting rod 25.
  • Cross-piece 26 also carries a support 27 which in turn carries a pressure plate 28 on its lower extremity.
  • a piston 29, having a connecting rod 30, is accommodated in cylinder bore 23; rod 30 likewise carries a cross-piece at its other end; the cross-piece, which is identified by numeral 31, prevents a torsional movement of connecting rod 30 in that it is guided along connecting rod 25 by means of a guide-fork 31' (see FIGS. 4 and 5).
  • a support 22 for insertion or tuck-in means 33 is attached to member 31. Depending on the mode of energizing piston 29 in cylinder bore 23, tuckin means 33 slide in under last 5 or are withdrawn therefrom.
  • the upper leather 34 of a shoe is pulled tight over last 5 by means of gripper arrangement 35 (only one being shown).
  • An insole 59 is attached to the bottom of last 5.
  • the last 5 is fixed on its support 2 by means of a pressure pad 36 which acts upon the front of the last (see FIG. 2).
  • the frame I carries on its upper front side another guide bar 37 along which slides back-and-forth a support carriage 38 for a heel support 39.
  • the heel support 39 is so mounted on the carriage 38 that its height may be manually adjusted (see FIGS. I and 2).
  • a guide lever 40 which is connected with a bellcrank 41 supported at point 42 so as to be actuated by a piston-cylinder unit 45, 46 whose connecting rod 44 engages the other extremity 41 of bell-crank 41 by means of a forked piece 43.
  • guide-rail 1' At its front end guide-rail 1' (see FIGS. 1 and 2) is provided with a slotted aperture 47 threaded by a pin 48 with nut 49 for a lever 50.
  • the latter carries a rotatable roller 52 on a journal pin 51.
  • a slotted aperture 53 extends along the lower extremity of lever 50; a slidable support 54 may beadjustably fixed along slotted aperture 53 so that it adopts varying locations relative to pin 48.
  • Support element 54 is provided with a bore which slidably accommodates a stop-bar 55.
  • a stop-collar 56 is seated on stop-bar 55 and can be fixed at any desired location therealong.
  • a boss 55' provides a swivelling attachment for stop-bar 55 by engaging a pin 57 on carriage 38.
  • Carriage 6 has a fixed detent 58 located so as to limit longitudinal movement thereof by abutting against roller 52 attached to lever 50.
  • stop-bar 55 acts to determine the angular position of lever 50.
  • Roller 52 which is carried by the lever, defines the end-position for the path travelled by carriage 6 which then comes into abutment with its detent 58 against roller 52. This determines the position of tuck-in means 33 relative to last 5.
  • Insole 59 is attached by pins to the bottom of last 5 and then upper leather 34 is laid thereover. The last is then mounted by hand on its support 2 and the edge of upper leather 34 is manually inserted into gripper arrangement 35 located along the front of last 5. In response to a foot-operated switch the gripper arrangement closes in a conventional manner and pulls the upper leather tightly over the last.
  • Carriage 38 with heel support 39 is then actuated by means of piston 45 and cylinder 46, and moves along guide-bar 37 until heel support 39 comes into abutment against last 5.
  • Stop-bar 55 participates in this move ment by sliding in support element 54; it then comes into abutment thereagainst with its collar 56 and pivots lever 50 about support pin 48 until carriage 38 has stopped. This brings the roller into a position determined by the size of the last.
  • the position of roller 52 can be adjusted by shifting pin 48 in slot 47, the position of pivoting support 54 in slot 53 and of collar 56 on stop-bar 55.
  • the wiper head 3 advances until cutter 4 reaches the edge of last 5 (see FIG. 3).
  • carriage 6 participates in this movement of wiper head 3 until detent 58 of carriage 6 comes into abutment against roller 52 on lever 50 (see FIG. 2). From there on the wiper head can advance alone and as a result compresses spring 8 (see FIG. 6) since carriage 6 cannot be moved any further.
  • the side tuck-in device 28, 33 is not in the correct position with respect to the joint area of last 5.
  • Conventional control means trigger the pressure medium which helps to actuate piston 24 so that pressure plate 28 comes into abutment against last 5 and presses upper leather 35 thereagainst.
  • Wipers 4 then carry out the wiping operation and arrive into the position indicated by a dashed line 4 (see FIG. 3)
  • Gripper arrangement 35 opens and releases the edge of upper leather 34.
  • Tuck-in device 33 then moves into its operating position (see FIG. 5). This takes place in response to actuation of piston 29 by means of a pressure medium.
  • a toe-lasting machine including a machine frame, a first carriage with a heel support, a second carriage with a wiper head and wipers, and a pair of separate tuck-in means for a joint area of an upper leather of a shoe characterized in that said second carriage on which is mounted said wiper head and said wipers also carries said tuck-in means, a length of a last is sensed from said heel support with aid of adjustable linkage means including a lever carrying a roller, said linkage means being supported on said first carriage with said heel support and on said machine frame, said roller being set to serve as a limiting stop in cooperation with a detent rigidly associated with said second carriage which supports said tuck-in means.
  • a toe-lasting machine according to claim 1, wherein said second carriage is propelled by said wiper head and is supported thereagainst via a spring.
  • a toe-lasting machine according to claim 2, wherein said spring together with its mount are adjustable along said second carriage.
  • a toe-lasting machine wherein a pin supports said lever which carries said roller, said pin being adjustably accommodated in a slotted aperture in said machine frame, a support being slidably accommodated in a slotted aperture in said lever, a stop-bar being slidably accommodated in said support, said stop-bar carrying a collar adjustable therealong.
  • a toe-lasting machine wherein said second carriage is propelled by said wiper head and is supported thereagainst via a spring.
  • a toe-lasting machine according to claim 5, wherein said spring together with its mount are adjustable along said second carriage.
  • a twin-cylinder arrangement includes a first piston assembly carrying a pressure-plate for urging the upper leather against the last in the joint area and a second piston assembly carrying said tuck-in means within the joint area, and a bell-crank lever carrying said twin-cylinder assembly so that the latter is perpendicularly ivotable.
  • a connecting rod of said second piston assembly carries a cross-piece with a guide-fork which I prevents its torsional movement by bracing it against a connecting rod of said first piston assembly, said first piston assembly rod being provided with a cross-piece which carries a guide-bar securing it against a tortional movement by bracing it against a housing portion of said twin-cylinder arrangement.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US00196480A 1970-11-10 1971-11-08 Toe-lasting machine Expired - Lifetime US3729758A (en)

Applications Claiming Priority (1)

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DE19702055213 DE2055213A1 (de) 1970-11-10 1970-11-10 Spitzenzwickmaschine

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US3729758A true US3729758A (en) 1973-05-01

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US (1) US3729758A (enExample)
DE (1) DE2055213A1 (enExample)
FR (1) FR2113641A5 (enExample)
GB (1) GB1329960A (enExample)
IT (1) IT939904B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995341A (en) * 1975-03-14 1976-12-07 Usm Corporation Shoe machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245120A1 (de) * 1982-12-07 1984-06-07 Internationale Schuh-Maschinen Co Gmbh, 6780 Pirmasens Vorrichtung zum spitzen- und ballenzwicken einer schuheinheit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324511A (en) * 1941-02-04 1943-07-20 United Shoe Machinery Corp Shoe-supporting means for shoe machines
US3087175A (en) * 1961-10-03 1963-04-30 Jacob S Kamborian Gauge assembly for heel seat lasting machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324511A (en) * 1941-02-04 1943-07-20 United Shoe Machinery Corp Shoe-supporting means for shoe machines
US3087175A (en) * 1961-10-03 1963-04-30 Jacob S Kamborian Gauge assembly for heel seat lasting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995341A (en) * 1975-03-14 1976-12-07 Usm Corporation Shoe machine

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FR2113641A5 (enExample) 1972-06-23
GB1329960A (en) 1973-09-12
IT939904B (it) 1973-02-10
DE2055213A1 (de) 1972-05-25

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