[0001] This invention is concerned with a machine for lasting side portions of shoe uppers
comprising a shoe support for supporting a shoe, comprising a shoe upper on a last
and an insole on the last bottom, side lasting roller means comprising two pairs of
lasting rollers one pair being arranged at each side of the shoe support, and each
pair being supported in a carrier which is mounted for pivotal movement about an axis
extending transversely of the bottom of a shoe supported by the shoe support, each
lasting roller being mounted for rotation about an axis extending transversely of
the shoe bottom, and rotating means being provided for effecting rotation of the lasting
rollers such that the lasting rollers of each pair rotate in contrary directions,
and each lasting roller further comprising a helical rib whereby, as the roller is
rotated, said rib effects an inwiping action on the lasting marginal portion of the
shoe upper engaged thereby, and drive means for effecting relative movement, in a
direction extending lengthwise of the shoe bottom, between the shoe support and the
lasting roller means, whereby a lasting operation is caused to take place in which
the lasting marginal portions of the shoe upper at opposite sides of the shoe are
progressively wiped over and pressed against corresponding marginal portions of the
insole by the lasting roller means, such lasting marginal portions being secured to
the insole in such wiped-over condition.
BACKGROUND OF THE INVENTION
[0002] The provision of a pair of lasting rollers operable along one side of a shoe bottom
in a so-called cement lasting machine is described in DE-C 2845303; more particularly
the two rollers, which extend with their axes of rotation parallel to one another,
are mounted in a bearing block which is itself in turn mounted for free-swinging movement
in a second bearing block or housing. The effect of such mounting is that the two
rollers are self-levelling, both thus being applied to the shoe bottom with an equalised
force during the lasting operation. By reason of the contrary rotation of the rollers,
furthermore, the resultant direction of the drafting force is said to extend perpendicular
to the edge of the last, thereby avoiding a problem often associated with roller side
lasting, namely the formation of folds in the lasting margin, especially at the ball
region where the lasting margin of the side region being lasted meets the lasting
margin previously lasted in a preceding toe-forepart lasting operation; such folds
are perceived in the aforementioned specification as being created, where a single
roller is used, by a build-up of material in front of such roller, which material
is pushed along towards the previously lasted region.
[0003] In practice it is not clear that the provision of two rollers supported by a free-swinging
bearing block achieves the desired avoidance of fold formation in all cases. In particular,
when side lasting progressively using cement (adhesive) the adhesive selected will
normally be characterised by an ability to hold firmly together the two surfaces to
be bonded upon contact therebetween so that it must be questionable what effect the
second roller can have in terms of inwiping and pressing. Thus if the first roller
operates in such a manner as to create folds, it is not clear in what way, when cement
side lasting, the second roller can affect the function of the first roller so as
to avoid fold formation.
[0004] It has been found that when using two lasting rollers the direction of rotation of
the "leading" one thereof, especially when side lasting progressively using cement,
is likely to be of more significance in terms of fold formation (and its avoidance)
than the provision of two rollers. When side lasting progressively using tacks or
other metallic fasteners on the other hand the provision of a pair of lasting rollers
at each side may be beneficial, depending upon the nature of the material of the shoe
upper.
[0005] One problem in particular has been found to arise when side lasting progressively
using a single lasting roller at each side of the shoe, namely that, especially in
the case of ladies' high-heeled shoes, if the lasting roller operating along the inside
waist region is rotating in such a direction that the operating portion thereof in
contact with the shoe upper moves in the same direction as that in which the lasting
roller is moved along the shoe bottom, excellent lasting can be achieved in terms
of the shoe upper being drawn tightly to the shoe last, but the operation of the other
roller, also rotating in such a direction that its contacting operating portion moves
in the same direction, along the outside waist region tends to create a build-up leading
to the formation of a fold at the "boundary" of the already lasted toe end portion
and the side region being thus lasted; that is to say, in some instances the achieving
of good lasting at one side of the shoe may give rise to poor lasting at the other.
Moreover, it is not practicable, in economic terms at least, to arrange for the lasting
rollers to rotate in opposite directions, necessitating switching the direction of
each roller between left and right shoes.
OBJECT OF THE INVENTION
[0006] It is thus the object of the present invention to provide an improved machine for
lasting side portions of shoe uppers using two pairs of lasting rollers, one pair
arranged at each side of the shoe, wherein the use of the lasting rollers of each
pair and the lasting forces applied thereby to lasting marginal portions of the shoe
uppers can be closely controlled.
SUMMARY OF THE INVENTION
[0007] This object is resolved in accordance with the present invention, in a machine as
set out in the first paragraph above, by the provision therein of control means for
controlling pivotal movement of each of the carriers of the lasting roller means,
independently of one another, whereby for each pair selectively one or both of the
lasting rollers thereof can be caused to operate in a lasting operation as aforesaid.
[0008] It will thus be appreciated that by the provision of control means whereby one or
both of the rollers of each pair can be selectively caused to engage the shoe upper,
the machine in accordance with the invention is much more versatile than previous
machines, allowing the selection of appropriate rollers, each rotating in an appropriate
direction, to be used and also enabling the lasting force applied by the lasting roller
means to each side of the shoe to be controlled, in accordance with the needs of that
shoe.
[0009] Moreover, the problems, referred to above, arising out of the nature of the shoe
upper material, may be resolved, it is often found, by varying the drafting force
applied by the lasting rollers. Such variation may be achieved by varying the pressure
with which each roller is urged against the shoe bottom, to which end different pressures
may be applied, through the control means, not only to each pair but also to each
roller of each pair. Alternatively, or indeed in addition, different lasting forces
may be applied according to whether one or both rollers of each pair are brought into
operation; this effect will be noted more significant when tack side lasting (for
the reasons set out above). In one instance, for example, a greater lasting force
may be desirable in the inside waist region, as compared with the outside waist region.
Again, it may be that, because of the manner in which a particular pattern of shoe
upper has been cut, there is less material in the outside waist region than in the
inside waist region and consequently it is desirable to apply a greater lasting force
to the outside waist region than to the inside waist region. Moreover, in the case
of relatively heavy shoe upper material it may be desirable to apply an enhanced lasting
force to both sides of the shoe bottom, as compared with the force applied in the
case of shoes made from relatively light shoe upper material.
[0010] The machine in accordance with the invention can be operated in various modes of
operation. Thus, to meet the particular problem of avoiding the formation of a fold
at the boundary with the previously lasted toe end portion of the shoe, it has been
found useful for a single lasting roller of each pair to be used, rotated each with
its operating surface engaging the shoe upper moving in the same direction as its
movement relative to the shoe support under the action of the drive means, from a
remote position towards the previously lasted end portion, but for the other lasting
roller of the pair operating along the outside waist region to be brought into operative
engagement with the shoe upper shortly before the previously lasted portion is reached,
said other roller by reason of its rotating in a contrary direction, thus mitigating
the risk of fold formation at the boundary. Depending upon the mounting of the lasting
rollers, either said other lasting roller may take over the lasting operation from
the first-mentioned roller, the latter being moved out of engagement with the shoe,
or, as in a preferred embodiment, the two rollers may operate together over the selected
final portion of the lasting operation.
[0011] In another mode of operation of the machine, the control means may be effective to
cause both rollers of each pair to engage the shoe upper lasting marginal portions
over the whole of the length of the side portions. This has been found to be of advantage
in the case of heavy work boots and the like. Again, in another mode of operation
of the machine, the control means may be effective to cause both lasting rollers of
the pair arranged at the "outside waist" side of the shoe to engage the shoe upper
lasting marginal portions while only one of the rollers of the pair arranged at the
"inside waist" side of the shoe is caused to engage the shoe along the whole of the
side thereof, or alternatively, in a different selected mode of operation, the control
means may be effective to cause both lasting rollers of the pair arranged at the "inside
waist" side of the shoe to engage the shoe upper lasting marginal portions while only
one of the rollers of the pair arranged at the "outside waist" side of the shoe is
caused to engage the shoe, according to the particular nature of the shoe and the
material from which its upper is made.
[0012] In the machine in accordance with the invention conveniently the axes of rotation
of the lasting rollers of each pair lie in a common plane but are inclined to one
another within said plane, the axis of pivotal movement of the carrier also lying
in said plane and intersecting the point of intersection of the axes of the rollers.
Preferably, the carrier is supported for pivotal movement as aforesaid on a support
on which a motor is also supported, operation of which motor, in response to a signal
from the control means, effects pivotal movement of the carrier on said support. In
this way, it will be appreciated, the control means may be rendered effective to vary
the applied lasting forces by rendering only one or both of the lasting rollers operative
not only as between lasting operations but also during a given lasting operation.
Moreover the pressure applied by the rollers of each pair can be varied for each roller
independently. Conveniently to this end the axis of pivotal movement of the carrier
is coincident with one of the roller axes; more particularly the roller axis of rotation
coincident with the axis of pivotal movement of the carrier is fixed in relation to
the support. It will of course be appreciated that the roller whose axis of rotation
is thus fixed is constantly in engagement with the shoe upper during the lasting operation,
and the other roller of each pair may selectively be brought into such engagement
either for the whole of the lasting operation, only part thereof or for no part thereof.
For varying the pressures applied by the rollers independently, a first motor is effective
to urge the support, and thus the roller with the fixed axis, towards the shoe bottom
under a first applied pressure, while the pressure applied by the carrier-pivoting
motor is separately adjustable and thus a second applied pressure can be applied by
the other lasting roller, means being provided for the independent setting of the
pressure supplied to each of the motors.
[0013] Conveniently also in an initial setting up operation the support, together with the
carrier and lasting rollers supported thereby, is bodily adjustable angularly in relation
to the shoe support about an axis extending lengthwise of the shoe bottom. In this
way, the inclination of the rollers can be set according to the transverse contour
of the shoe bottom being operated upon.
[0014] As already mentioned, the lasting rollers of each pair rotate in contrary directions.
Moreover, preferably the roller whose axis of rotation coincides with the axis about
which the carrier pivots rotates in such a manner that the operating surface portion
thereof in engagement with the shoe upper is moving in the same direction as the direction
in which the lasting roller means moves relative to the shoe bottom under the action
of the drive means.
[0015] Conveniently, in the machine in accordance with the invention, sensing means is provided,
e.g. associated with toe support means of the shoe support, for sensing whether the
shoe supported by the shoe support is a left or a right and for supplying an appropriate
signal to the control means. In this way, where the arrangement for operating on the
opposite sides of the shoe varies as above described the settings can be automatically
switched according to whether the shoe is a left or a right. Similarly where the relative
positions of the lasting rollers is varied during the lasting operation, desirably
such variation takes place in response to the input of the length of the path to be
followed by the rollers. This input may be made manually or automatic shoe length
measuring means may be provided, from which a signal may be supplied on the basis
of which the path length is calculated. Moreover selector means is preferably provided
for inputting information relating to the length of the path over which the rollers
are to operate.
[0016] Conveniently the control means comprises programme-controlled means, more particularly
a microprocessor responsive in accordance with programmed instructions and in response
to a particular selection of a mode of operation of the machine. Where a microprocessor
or similar computer device is used, furthermore, conveniently the shoe length measuring
means may be constituted by e.g. a linear potentiometer, the output of which, representing
a signal to the control means, is in the form of a voltage of variable value, while
the sensing means may comprise a proximity or like switch, which is responsive to
the position of e.g. the toe support means of the shoe support, which toe support
means is movable between two positions according to whether the shoe supported thereby
is a left or a right.
[0017] It will be appreciated that the invention is applicable to side lasting machines
both of the type using cement (adhesive) for securing the lasting marginal portions
of the shoe upper to the insole and also of the type using tacks or other metallic
fasteners for that purpose.
[0018] There now follows a detailed description, to be read with reference to the accompanying
drawings, of one machine in accordance with the invention. It will of course be realised
that this machine has been selected for description merely by way of non-limiting
example. A further embodiment of the invention is set out in claim 6.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In the accompanying drawings:-
Figure 1 is a perspective view of the machine in accordance with the invention; and
Figure 2 is a fragmentary view of a mounting for a lasting roller assembly of the
machine of Fig. 1;
Figures 3, 4 and 5 are fragmentary views, respectively from the front, in plan and
from the side, of said lasting roller assembly.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0020] The machine now to be described, which is a machine for lasting side and heel seat
portions of shoes, is generally similar, except as hereinafter described, to the machine
described in EP-A 0271303; of particular note is that for securing the lasting marginal
portions of the side portions of the shoe upper to corresponding marginal portions
of the insole thereof in the aforementioned machine tacks are used whereas in the
machine in accordance with the present invention adhesive is used as will be hereinafter
described.
[0021] The machine now to be described comprises a shoe support 10 mounted for movement
about a horizontal axis 12 between a shoe loading position and the operating locality
of the machine in which the heel end portion of a shoe S supported thereby is embraced
by a heel band 14 forming part of heel seat lasting instrumentalities of the machine,
said band 14 determining the lengthwise disposition of the shoe in the machine. The
shoe support 10 comprises a heel pin 16 and a toe rest 18 whereby the shoe can be
supported bottom up. For determining the heightwise disposition of the shoe in relation
to the heel seat lasting instrumentalities, a holddown 20 is also provided.
[0022] The machine also comprises heel seat lasting instrumentalities comprising a wiper
assembly, comprising a pair of wiper plates 26 by which marginal portions of a shoe
upper in the heel seat region of the shoe can be wiped over and secured to corresponding
marginal portions of the insole of the shoe, said assembly and its operation being
fully described in GB-A 2052950. In addition, the heel seat lasting instrumentalities
comprise fastener-inserting tools generally designated 28 associated with the wiper
assembly in such a manner that, after the over-wiping of lasting marginal portions
of the upper, said portions are secured to the insole by fasteners driven thereinto.
[0023] The machine further comprises side lasting instrumentalities by which opposite side
portions of the shoe upper can be wiped over and secured to corresponding marginal
portions of the insole, said side lasting instrumentalities comprising two side lasting
assemblies generally designated 230', arranged one at each side of the shoe support
10. The two side lasting assemblies are generally the same, save that the one is a
mirror-opposite of the other, and consequently only one of the assemblies will now
be described with reference to Figures 2 to 5.
[0024] Each side lasting assembly 230' comprises a forwardly extending support arm 370 which
is mounted at its rear end for pivotal movement about a horizontal axis 348 in a support
frame 362, also forwardly extending, which in turn is mounted for pivotal movement
about a vertical axis 364 whereby the forward ends of the arms can be moved towards
and away from the shoe support and towards and away from each other. At an intermediate
position along the length of each arm the support frame supports also a motor, in
the form of a pneumatic cylinder 366, for effecting pivotal (heightwise) movement
of the arm about its horizontal support axis 348. Further motor means, in the form
of two hydraulic cylinders 352, one associated with each arm, effects movement of
the forward ends of the arms towards and away from one another. The machine also comprises
drive means in the form of a further hydraulic motor 350 mounted on the machine frame
for effecting fore-and-aft movement of the side lasting instrumentalities, thus to
effect movement thereof relative to the shoe support 10.
[0025] In the rest condition of the machine, the lowermost position of the arm 370 relative
to the support frame 362 is determined by a stop 368, the heightwise position of which
can be manually set via pneumatic cylinder 358 mounted (see Figure 1) on the front
of the machine and operatively connected to the stop 368 by a Bowden cable 356.
[0026] Supported at the forward end of the arm 370 is a plate 372 having an arcuate slot
374 and groove 376 formed therein, the groove providing a track for rolls 378 mounted
on a support block 380, which also carries a clamping nut 382 by which the support
can be locked in position in relation to the plate 372. The support block 380 has
an integral annular lug 383 at the upper end thereof in which is secured a rotary
drive motor 384, e.g. a hydraulic motor, for a first lasting roller 386. The axis
of rotation of the roller 386, and the axis of the annular lug 383, as well as of
the motor 384, are all coincident. Moreover, supported on the body of the motor 384
is a carrier 388, by which thus the motor 384 can also be considered to be supported,
said carrier 388 being mounted for pivotal movement on the body of the motor 384 about
an axis coincident with the axis of rotation of the roller 386. The carrier 388 supports
in a lug thereof a further rotary drive motor 390, again e.g. a hydraulic motor, for
a second lasting roller 392. The axis of rotation of the roller 392 lies in a common
plane with the axis of rotation of the roller 386, but the two axes are inclined to
one another within said plane. The angle of such inclination within the plane is acute,
being of the order of 20°. It is desirable that the axis of pivotal movement of the
carrier 388 intersects the point of intersection of the axes of the rollers 386, 392;
this is of course achieved in the machine being described by the axis of pivotal movement
being coincident with the axis of rotation of the roller 386. For effecting pivotal
movement of the carrier 388, furthermore, a piston-and-cylinder arrangement 394 is
provided, mounted on the support block 380, the piston rod 396 thereof being connected
with the carrier 388.
[0027] Each lasting roller 386, 392 is provided with a helical rib whereby, as the roller
is rotated, the rib effects an inwiping action on the lasting marginal portion of
the shoe upper engaged thereby, the arrangement being such that in the operation of
the machine the rollers of each pair are caused to rotate in contrary directions,
more particularly such that an operating surface portion of each roller when in engagement
with the shoe upper is moving in a direction towards the other lasting roller; to
this end therefore the helical rib of the lasting roller 386 describes a left-hand
helix and that of the lasting roller 392 a right-hand helix. It will be appreciated
that, in addition to the inwiping component of movement of the helical rib of each
lasting roller as it is caused to rotate, there is also a component of movement of
such rib in a direction towards the other lasting roller, and moreover away from the
end of the shoe to which the particular lasting roller is more nearly disposed; that
is to say, in the case of the machine now being described the "shoe-lengthwise" component
of movement of the lasting roller 386 is away from the heel end of the shoe while
that of the lasting roller 392 is away from the toe end.
[0028] The arrangement of the groove-and-rolls arrangements 376, 378 enables the angle of
the carrier 388, and thus of both rollers 386, 392 to be adjusted according to the
transverse contour of the shoe bottom, the clamping lever 382 enabling the rollers
to be held in any desired disposition to the extent determined by the length of the
slot 374. As will be seen from Figure 4, furthermore, the axis of rotation of the
lasting roller 386 is disposed at a small acute angle to the perpendicular to the
longitudinal centre line of the machine, with its free end towards the heel end of
the shoe.
[0029] The machine in accordance with the invention also comprises an in-machine adhesive-applying
system comprising two adhesive-applying nozzles 400 (see Figure 1) arranged to operate
along opposite side portions of the shoe bottom thus to apply adhesive to marginal
portions of the insole in the region of said side portions. (In other machines in
accordance with the invention and otherwise similar to the machine here described
other conventional adhesive-applying systems may be used to apply adhesive to the
marginal portions of the insole and/or the upstanding lasting marginal portions of
the shoe upper.) The adhesive-applying nozzles 400 are mounted for movement fore-and-aft
on a slide frame comprising four rods 402 and initially move in a rectilinear path
thus to clear the ends of the "legs" of the heel band. Theieafter each nozzle is guided
along a path parallel to the periphery of the insole by a guide (not shown) which
engages said periphery (or the shoe last adjacent the insole) and which is mounted
in a fixed relationship with its nozzle 400. Each nozzle/guide arm assembly is urged
resiliently against the insole periphery and the assemblies are moved along their
fore-and-aft path by means of a hydraulic motor (not shown) which operates synchronously
with the drive means for the lasting rollers.
[0030] In certain modes of operation of the machine it is necessary to provide an input
as to whether the shoe being operated upon is a left or a right. In the machine therefore
sensing means is provided, associated with the toe rest 18, which for this purpose
can rock about a horizontal fore-and-aft axis 18
a, it being thus rocked in one direction when a left shoe toe is supported thereby
and in the other direction when a right shoe toe is thus supported. The sensing means
may be in any suitable form, e.g. a proximity switch (not shown), which signals the
control means of the machine according to the direction in which the toe rest 18 has
been rocked.
[0031] Similarly for determining the length of the path of the lasting rollers 386, 392,
the incidence of certain activities (to be referred to hereinafter) relating thereto
and also the length of the path of the adhesive-applying nozzles 400, the machine
is provided with path-length setting means including an operator-actuatable selector
knob 410 controlling a rotary potentiometer which thus supplies a corresponding signal
to the control means of the machine. (Alternatively automatic shoe length measuring
means, including e.g. a linear potentiometer, may be provided.)
[0032] The control means of the machine is preferably programme-controlled means which includes
a microprocessor programmed not only to cause the various modes of operation of the
machine (as will be hereinafter described) to take place, but also to control the
temperature of the various integers of the adhesive-applying system and other functions
of the machine, including the synchronous operation of the motor for the nozzles 400
and the drive means for the lasting rollers.
[0033] The machine also comprises selector means (not shown) whereby different modes of
operation of the machine can be selected, according to the needs of the shoe to be
operated upon.
[0034] In the operation of the machine, after a shoe S, the toe end portion of which has
previously been lasted, has been placed upon the shoe support 10 while the latter
is in its loading position, in sequence the shoe support 10 is swung into its operative
position, determined by engagement of the heel end of the shoe with the heel band
14, and further is moved heightwise to bring the heel seat region thereof into engagement
with the holddown 20. At this time the sensing means signals whether the shoe is a
left or a right Depending upon the nature of the shoe upper material of the shoe to
be lasted, and according to the mode of operation selected, the stops 368 will have
been set such that either the lasting rollers 386, 392 will engage the shoe upper
during their inward movement towards each other (usually in the case of heavy shoe
upper material) or will remain above the shoe upper and thus not have any inwiping
effect thereon during such inward movement (usually in the case of light, stretchable,
upper material). Whatever the setting of the stops at the stalt of the lasting operation
the side lasting assemblies and also the adhesive-applying nozzles 400 are moved inwards.
The adhesive-applying nozzles first engage the insole and apply adhesive to the shoe
bottom (lasting margin of the upper and/or margin of the insole) progressively from
the heel breast line toewardly, according to the path length input. Following the
initiation of adhesive application, and after the rollers have completed their inward
movement, the stops 368 are retracted so that the lasting rollers (or selected ones
thereof) now apply a lasting pressure to the lasting marginal portions of the upper
under the control of the various motors, as will be hereinafter described.
[0035] In one mode of operation of the machine, which may be selected when operating upon
light, relatively stretchable materials, only the two rollers 386 are caused to engage
the lasting margin of the shoe upper, the other rollers 392 being held out of engagement
by the motor 394. The engagement of rollers with the shoe takes place in the heel
breast line region (the heel seat being lasted in the same operation by the seat last
instrumentalities) and the drive means then causes the side lasting instrumentalities
to be moved toewardly towards the "boundary" with the previously lasted toe end portion.
[0036] As the rollers approach the ball region of the shoe bottom, i.e. just short of the
"boundary" with the previously lasted toe end portion, the "outside waist" roller
392 is also moved into engagement with the shoe upper lasting marginal portion. Because
of its contra-rotation this roller 392 acts directly against the formation of a fold
in the material which may have built up in front of the "outside waist" roller 386.
It is not expected that any fold will be likely to be formed along the "inside waist"
side of the shoe, but to give additional inward drafting of the shoe upper material
at the ball region, if desired both pairs of rollers 386, 392 can be moved axially
inwards, in the manner described in EP-A 0271303.
[0037] It will be appreciated that instead of only the one "inside waist" lasting roller
386 operating as aforesaid both "inside waist" rollers 386, 392 may be used, with
or without the axial displacement described above, without going outside the scope
of the invention in its broader aspects. Similarly in other machines in accordance
with the invention, and otherwise similar to the machine herein disclosed, the engagement
of the second "outside waist" roller 392 with the shoe upper may be followed by or
coincide with the withdrawal of the first roller 386, always of course provided that
no portion of the side of the shoe remains unlasted; this could for example be achieved
by the rearward roller constituting the second roller, so that, in engaging the shoe
upper, it would overlap part of the lasting margin already lasted by the first roller.
[0038] In another mode of operation of the machine described herein it has been found that
satisfactory lasting results may be achieved by lasting the whole of the "outside
waist" side by both rollers 386, 392 while the "inside waist" side of the shoe is
lasted using only the first roller 386. Alternatively, again depending upon the nature
of the shoe upper material, in some cases it has been found beneficial to last the
"inside waist" side using the two rollers 386, 392 and the "outside waist" side with
the first roller 386 only. Clearly also the machine may be set up to operate with
both rollers 386, 392 operating on both sides or indeed only the first roller 386
on both sides.
[0039] In the operation of the machine, furthermore, the rollers 386 are each urged against
the shoe bottom by the motor 366 acting on the support arm 370 to cause it to pivot
about its horizontal axis, while each second roller 392 is urged against the shoe
bottom by the motor 394 acting on the carrier 388 for pivoting said second roller
into such engagement. Thus the facility is provided for varying the pressure applied
by said motors and thus for varying the pressure applied by each roller to the shoe
bottom, independently of each other roller. The machine also comprises operator-actuatable
means, in the form of knobs 398 on the machine control panel, for setting the desired
pressure for each motor.
[0040] It will thus be appreciated that with a machine having the foregoing features, especially
with the programme-controlled microprocessor system, a much greater degree of versatility
is provided than has previously been the case.
1. Machine for lasting side portions of shoe uppers comprising
a shoe support (10) for supporting a shoe (S), comprising a shoe upper on a last
and an insole on the last bottom,
lasting roller means (230') comprising two pairs of lasting rollers (386; 392),
one pair being arranged at each side of the shoe support (10), and each pair being
supported on a carrier (388) which is mounted for pivotal movement about an axis extending
transversely of the bottom of a shoe supported by the shoe support (10), each lasting
roller (386; 392) being mounted for rotation about an axis also extending transversely
of the shoe bottom and rotating means (384,390) being provided for effecting rotation
of the lasting rollers (386; 392) such that the lasting rollers of each pair rotate
in contrary directions, and each lasting roller (386; 392) further comprising a helical
rib whereby, as the roller is rotated, said rib effects an inwiping action on the
lasting marginal portion of the upper engaged thereby, and
drive means (350) for effecting relative movement, in a direction lengthwise of
the shoe bottom, between the shoe support (10) and the lasting roller means (230'),
whereby a lasting operation is caused to take place in which the lasting marginal
portions of the shoe upper at opposite sides of the shoe are progressively wiped over
and pressed against corresponding marginal portions of the insole by the lasting roller
means (230'), such lasting marginal portions being secured to the insole in such wiped-over
condition,
said means being characterised by control means for controlling pivotal movement
of each of the carriers (388) of the lasting roller means (230'), independently of
one another, whereby for each pair selectively one or both of the lasting rollers
(386; 392) thereof can be caused to operate in a lasting operation as aforesaid.
2. Machine according to Claim 1 characterised in that the carrier (388) is supported
for pivotal movement as aforesaid on a support (380, 383) on which a motor (394) is
also supported, operation of which motor, in response to a signal from the control
means, effects pivotal movement of the carrier (388) on said support (380, 382).
3. Machine according to Claim 2 characterised in that the support (380, 383), together
with the carrier (388) and lasting rollers (386, 392) supported thereby, is bodily
adjustable angularly in relation to the shoe support (10) about an axis extending
lengthwise of the shoe bottom.
4. Machine according to any of the preceding Claims characterised in that the axes of
rotation of the lasting rollers (386; 392) of each pair lie in a common plane but
are inclined to one another within said plane, and in that the axis of pivotal movement
of the carrier (388) also lies in said plane and intersects the point of intersection
of the axes of the rollers (386; 392).
5. Machine according to Claim 4 characterised in that the axis of pivotal movement of
the carrier (388) is coincident with the axis of one (386) of the rollers (386; 392).
6. Machine according to Claim 5 characterised in that the roller (386) whose axis of
rotation coincides with the axis about which the carrier (386) pivots rotates in such
a manner that the operating surface portion thereof in engagement with the shoe upper
is moving in the same direction as the direction in which the lasting roller means
(230') moves relative to the shoe bottom under the action of the drive means (350).
7. Machine according to Claim 5 or 6 when tied to Claim 2 characterised in that the axis
of rotation of said one (386) of the rollers (386,392) is fixed in relation to the
support (380, 383).
8. Machine according to Claim 2 or 3 or any one of Claims 4 to 7 when tied, directly
or indirectly to either thereof characterised in that the motor (394) for the carrier
(388) is a fluid pressure operated motor (394) and a further fluid pressure operated
motor (366) is provided for urging said support (380, 383) by which the carrier (388)
is supported towards the shoe support (10) as aforesaid, means (398) being provided
for independent setting of the pressured supplied to each of the motors (366, 394).
1. Maschine zum Zwicken von Seitenabschnitten von Schuhschäften, die folgendes umfaßt:
eine Schuhstütze (10) zum Stützen eines Schuhs (S), welcher einen Schuhschaft auf
einem Leisten und eine Brandsohle an der Leistenunterseite umfaßt,
und eine Zwickrolleneinrichtung (230'), die zwei Zwickrollenpaare (386; 392) umfaßt,
wobei an jeder Seite der Schuhstütze (10) ein Paar angeordnet ist und wobei jedes
Paar an einem Trager (388) angebracht ist, der für eine Schwenkbewegung um eine Achse
gelagert ist, die sich quer zur Unterseite eines von der Schuhstütze (10) gestützten
Schuhs erstreckt, wobei jede Zwickrolle (386; 392) zum Drehen um eine Achse gelagert
ist, die sich ebenfalls quer zur Schuhunterseite erstreckt, und wobei eine Dreheinrichtung
(384, 390) zum Bewirken einer Drehbewegung der Zwickrollen (386; 392) dergestalt vorgesehen
ist, daß sich die Zwickrollen eines jeden Paares in entgegengesetzte Richtungen drehen,
und wobei jede Zwickrolle (386; 392) ferner mit einer schraubenförmigen Rippe versehen
ist, wodurch diese Rippe, während die Rolle gedreht wird, eine Überschiebwirkung auf
den Zwickrandabschnitt des Schaftes ausübt, mit dem sie im Eingriff ist, und
eine Antriebseinrichtung (350) zum Bewirken einer relativen Bewegung zwischen der
Schuhstütze (10) und der Zwickrolleneinrichtung (230') in Langsrichtung der Schuhunterseite,
wodurch veranlaßt wird, daß ein Zwickvorgang stattfindet, bei dem die Zwickrandabschnitte
des Schuhschaftes an gegenüberliegenden Seiten des Schuhs fortschreitend mittels der
Zwickrolleneinrichtung (230') über entsprechende Randabschnitte der Brandsohle übergeschoben
und gegen die Brandsohle gedrückt werden, wobei solche Zwickrandabschnitte in einem
solchen übergeschobenen Zustand an der Brandsohle befestigt werden,
wobei diese Einrichtung durch eine Steuereinrichtung zur Steuerung einer Schwenkbewegung
eines jeden der Träger (388) der Zwickrolleneinrichtung (230') unabhängig voneinander
gekennzeichnet ist, wodurch für jedes Paar wahlweise eine oder beide Zwickrollen (386;
392) dazu veranlaßt werden kann bzw. können, in einem Zwickvorgang wie vorstehend
beschrieben zu arbeiten.
2. Maschine gemäß Anspruch 1, dadurch gekennzeichnet, daß der Träger (388) für eine Schwenkbewegung
wie oben erwähnt auf einer Stütze (380, 382) gelagert ist, an der auch ein Motor (394)
befestigt ist, dessen Betrieb aufgrund eines Signals von der Steuereinrichtung eine
Schwenkbewegung des Trägers (388) an der Stütze (380, 382) bewirkt.
3. Maschine gemäß Anspruch 2, dadurch gekennzeichnet, daß die Stütze (380, 382) zusammen
mit dem Träger (388) und den davon gelagerten Zwickrollen (386, 392) winkelmäßig relativ
zur Schuhstütze (10) um eine sich längs der Schuhunterseite erstreckende Achse körperlich
einstellbar ist.
4. Maschine gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die
Drehachsen der Zwickrollen (386; 392) eines jeden Paares in einer gemeinsamen Ebene
liegen, jedoch innerhalb dieser Ebene aufeinander zu geneigt sind, und daß die Achse
der Schwenkbewegung des Trägers (388) ebenfalls in dieser Ebene liegt und den Schnittpunkt
der Achsen der Rollen (386; 392) kreuzt.
5. Maschine gemäß Anspruch 4, dadurch gekennzeichnet, daß die Achse der Schwenkbewegung
des Trägers (388) mit der Achse einer (386) der Rollen (386; 392) zusammenfällt.
6. Maschine gemäß Anspruch 5, dadurch gekennzeichnet, daß sich diejenige Rolle (386),
deren Drehachse mit der Achse zusammenfällt, um die der Träger (386) schwenkt, auf
eine solche Weise dreht, daß sich dessen im Eingriff mit dem Schuhschaft stehender
im Betrieb befindlicher Oberflächenabschnitt in die gleiche Richtung bewegt wie die
Richtung, in die sich die Zwickrolleneinrichtung (230') unter der Wirkung der Antriebseinrichtung
(350) relativ zur Schuhunterseite bewegt.
7. Maschine gemäß Anspruch 5 bzw. 6, wenn mit Anspruch 2 verknüpft, dadurch gekennzeichnet,
daß die Drehachse der einen (386) der Rollen (386, 392) relativ zur Stütze (380, 383)
ortsfest ist.
8. Maschine gemäß Anspruch 2 bzw. 3 bzw. einem der Ansprüche 4 bis 7, wenn direkt oder
indirekt mit einem dieser Ansprüche verknüpft, dadurch gekennzeichnet, daß es sich
bei dem Motor (394) für den Träger (388) um einen mit Fluiddruck betriebenen Motor
(394) handelt und ein weiterer mit Fluiddruck betriebener Motor (366) dafür vorgesehen
ist, die Stütze (380, 383), mittels derer der Träger (388) gestützt wird, wie oben
erwähnt auf die Schuhstütze (10) zu zu drücken, wobei eine Einrichtung (398) zum unabhängigen
Einstellen des an jeden der Motoren (366, 394) gelieferten Druckes vorgesehen ist.
1. Machine pour le montage de flancs de dessus de chaussures comprenant
un support (10) de chaussure pour supporter une chaussure (S), comprenant un dessus
de chaussure sur une forme et une semelle intérieure sur la partie inférieure de la
forme,
un moyen (230') à rouleaux de montage comprenant deux paires de rouleaux (386;
392) de montage, une paire étant placée de chaque côté du support (10) de chaussure,
et chaque paire étant supportée sur un dispositif porteur (388) qui est monté pour
un mouvement pivotal autour d'un axe s'étendant transversalement à la partie inférieure
d'une chaussure supportée par le support (10) de chaussure, chaque rouleau (386; 392)
de montage étant monté pour tourner autour d'un axe s'étendant aussi transversalement
à la partie inférieure de chaussure, et un moyen de rotation (384,390) étant fourni
pour effectuer la rotation des rouleaux (386; 392) de montage de façon à ce que les
rouleaux de montage de chaque paire tournent dans des directions contraires, et chaque
rouleau (386; 392) de montage comprenant en outre une nervure hélicoïdale grâce à
quoi, au fur et à mesure que le rouleau tourne, ladite nervure effectue une action
de rabattage en dedans sur la partie marginale de montage du dessus engagé de cette
nervure, et
un moyen (350) d'entraînement pour effectuer un mouvement relatif, dans une direction
dans le sens de la longueur de la partie inférieure de chaussure, entre le support
(10) de chaussure et le moyen (230') à rouleaux de montage, par lequel une opération
de montage est provoquée dans laquelle les parties marginales de montage du dessus
de chaussure aux côtés opposés de la chaussure sont progressivement rabattues et pressées
contre les parties marginales correspondantes de la semelle intérieure par le moyen
(230') à rouleaux de montage, ces parties marginales de montage étant fixées à la
semelle intérieure dans cet état rabattu,
ledit moyen étant caractérisé par un moyen de commande pour commander le mouvement
pivotal de chacun des dispositifs porteurs (388) du moyen (230') à rouleaux de montage,
indépendamment l'un de l'autre, par lequel pour chaque paire sélectivement le fonctionnement
de l'un ou des deux rouleaux (386; 392) de montage de celui-ci peut être provoqué
dans une opération de montage comme susmentionné.
2. Machine selon la revendication 1, caractérisée en ce que le dispositif porteur (388)
est supporté pour un mouvement pivotal comme susmentionné sur un support (380, 382)
sur lequel un moteur (394) est également supporté, moteur dont le fonctionnement,
en réponse à un signal provenant du moyen de commande, fait pivoter le dispositif
porteur (388) sur ledit support (380, 382).
3. Machine selon la revendication 2, caractérisée en ce que le support (380, 382), ainsi
que le dispositif porteur (388) et les rouleaux (386, 392) de montage supportés par
celui-ci, peut être ajusté physiquement à un certain angle par rapport au support
(10) de chaussure autour d'un axe s'étendant dans le sens de la longueur de la partie
inférieure de chaussure.
4. Machine selon une quelconque des revendications précédentes, caractérisée en ce que
les axes de rotation des rouleaux (386; 392) de montage de chaque paire se situent
dans un plan commun mais sont inclinés les uns par rapport aux autres dans ledit plan,
et en ce que l'axe de mouvement pivotal du dispositif porteur (388) se situe également
dans ledit plan et passe par le point d'intersection des axes des rouleaux (386; 392).
5. Machine selon la revendication 4, caractérisée en ce que l'axe du mouvement pivotal
du dispositif porteur (388) est coïncident avec l'axe de l'un (386) des rouleaux (386;
392).
6. Machine selon la revendication 5, caractérisée en ce que le rouleau (386) dont l'axe
de rotation coïncide avec l'axe autour duquel le dispositif porteur (386) pivote tourne
d'une telle manière que la partie de surface de manoeuvre de celui-ci engagée avec
le dessus de chaussure se déplace dans la même direction que la direction dans laquelle
le moyen (230') à rouleaux de montage se déplace par rapport à la partie inférieure
de chaussure sous l'action du moyen (350) d'entraînement.
7. Machine selon la revendication 5 ou 6, lorsqu'elle est liée à la revendication 2,
caractérisée en ce que l'axe de rotation dudit l'un (386) des rouleaux (386,392) est
fixe par rapport au support (380, 383).
8. Machine selon la revendication 2 ou 3 ou l'une quelconque des revendications 4 à 7,
lorsque liée, directement ou indirectement à l'une de celles-ci, caractérisée en ce
que le moteur (394) pour le dispositif porteur (388) est un moteur (394) commandé
par pression de fluide et un autre moteur (366) commandé par pression de fluide est
fourni pour presser ledit support (380, 383) par lequel le dispositif porteur (388)
est supporté vers le support (10) de chaussure comme susmentionné, un moyen (398)
étant fourni pour un réglage indépendant de la pression fournie à chacun des moteurs
(366, 394).