close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3024492

код для вставки
March 13, 1962
l
Filed Sept. 6, 1960
D. s. HALL ETAL
3,024,482
SHOE TOE LINING TRIMMING MACHINES
»
3 Sheets-Sheet 1
Ü
[n1/anion*
-à
Dennis «SÍ Hall
@Ma ¿M4
March 13, 1962
D. s. HALL ETAL
3,024,482
SHOE TOE LINING TRIMMING MACHINES
Filed sept. e, 1960
5 Sheets-Sheet 2
March 13, 1962
D_ s, HALL ETAL
3,024,482
SHOE TOE LINING TRIMMING MACHINES
Filed Sept. 6, 1960
3 Sheets-Sheet 5
ÚM
|
|
l
I
United States 4atent Ü
3,024,482
Patented Mar. 13, 1962
1
3,024,482
SHOE TOE LINHNG »TRIMMH‘IG MACI'HNES
>Dennis S. Hail and Philip Reader, Leicester, England,
assignors to United >Shoe Machinery Corporation, lios
ton, Mass., a corporation of New .l'ersey
Filed Septiö, «1960, Ser. No. 54,244
Claims priority, application Great Britain (Pct. 23, 1959
7 Claims. (Cl. l2-57.6)
This invention relates to trimming machines and more
particularly to machines for trimming the surplus lasting
may be removed from the shoe. In the latter case ín
stead of falling into the scrap receptacle‘the sliver may
curl upwardly and become entangled in the surrounding
mechanism. When this occurs, it is possible ‘for the ma
chine to become jammed whereupon it is necessary to
dismantle part of the machine to remove the scrap which
is causing the jam. `While the Hill machine is extremely
eflicient for performing the wiping and trimming opera
tions, it is compact having a large quantity of operative
mechanism in a small area. It follows, therefore, that
complete dismantling of the cover of the machine and
those portions of the operative mechanism which have be
come jammed is time consuming and is to be avoided
margins ofthe lining materials at the toe of a partially
fabricated shoe.
if possible.
A machine embodying the present invention is to be
It is one of the objects of this invention to provide a
used on shoes of the nat-lasted type in which the lasting 15
trimming machine of the type disclosed in the abovemargins of the upper materials are secured flush with the
mentioned Hill patent wherein the necessity for com
insole by tacks or cement, as distinguished from a welted
pletely dismantling the machine owing to the 'machine
shoe in which they are secured to an upstanding rib
becoming jammed is obviated.
formed on the insole. The outer layer of shoe material
commonly of upper leather will hereinafter be referred 20 Another object of this invention is to provide a
trimming machine having a main body portion and a
to as the “upper” and the term “lining” will, for conven
hinged cover which may be readily elevated to expose
ience, be used to refer collectively to the layers backing
interior portions of both the cover and the body.
the upper, these layers including normally a lining, a stiff
lt is still another object of this invention to provide
box toe, and frequently an intermediate doubler.
The operation of trimming the surplus lining at the toe 25 a trimming machine -havingfshoemaking instrumentalities
located in a cover member'and driving instrumentalities
takes place after side lasting and its purpose is to reduce
located in a main body portion with meanslfor disengag
the bulk of the lmaterial subsequently'to be toe lasted.
Ving the Ashoemaking instrumentalities from >’their driving
lf surplus lining at the toe were not properly severed,
members yto facilitate raising andlowering of vthe cover.
bulges in the lining would be formed between the insole
Still another object of this invention is to provide a
and upper as the lasting margins of both'the upper and 30
trimming machine having a main Vbody portion and a
lining are creased and pleated when they are secured to
hinged cover with safety mechanism for rendering the
the bottom of the insole. The formation of bulges is to
machine inoperative Awheneverthe cover is raised.
be avoided as it prevents the outsole from being fastened
In accordance with these objects and as a feature of
to the shoe smoothly and neatly. The reduction of bulk
is most important on shoes, particularly women’s, which 35 this invention there is provided a ymachine -for trimming
surplus material from a partially fabricated shoe, 'the
have sharply pointed toes formed with a small radius of
machine having a main body portion and a head normally
curvature, since the sharper thel curve the more the lasting
margins are pleated and consequently greater overlapping
covering the body portion. Shoemaking instrumentalities
lincluding wipers and pincers are operatively mounted in
In toe lasting, the upper and the lining are forcibly 40 the head, their driving means, including cams, being lo
cated in the body portion. The head is secured to the
wiped over the toe of the last toward the bottom of the
body at one» end by means permitting it to'be pivoted up
Vinsoleto shape the toe, then they-are laid over the bottom
wardly to expose interior portions of both thehead and
of the insole under tension, creased, pleated and secured
occurs.
the body. In addition, counterbalancing means are -pro
thereto by tacks or cement. This toe-forming process
tends to stretch the upper and move the margins of the 45 vided to facilitate raising the head and maintaining it in
its elevated position.
upper and lining past the insole bottom, resulting in more
As another feature of this invention, a safety device is
stock to be secured. If trimming takes place without iirst
provided in the form of a microswitch for breaking the
performing the lining and upper to the toe of the shoe to
produce approximately thesame amount of margin below
>circuit to the driving motor, the switch being automati
the insole bottom as is produced in toe lasting, the excess 50 cally opened whenever the head is elevated.
obtained in the lasting operation results in undesirable
As another feature of this invention, ~means are pro- '
vided which are automatically operative for disassociat
ing the Wipers from their driving cam whenever the head
A machine for trimming surplus portions of the box
Yis raised thereby preventing any interference between the
toe and lining material is disclosed in United States Patent
No. 2,736,910, issued March 6, 1956 on an application 55 cams which are located in the body and the wiper mecha~
nism which is located in the head. Furthermore, man
of Roscoe L. Hill. The Hill machine not only tensions
ually operated means in the form of a toggle linkage is
the upper during the trimmingzprocess'butalso wipes the
bulges.
upper and lining material prior to tensioning it where
provided to disassociate the pincer mechanism, which is
material is removed from the shoe prior to lasting.
ering the head.
located inthe head, from its driving mechanism which
upon more lining is moved past the insole bottom than
would be the -case were tensioning alone employed. Ac~ 60 is located in the body, thereby also preventing any inter
ference between thesemechanisms upon raising and low
cordingly, virtually all of the surplus box toe and lining
`
The above and other featuresof the invention includ
ing various novel details of construction and 'combina
machine, the surplus material, which is trimmed, falls
through an opening in the machine into a receptacle pro 65 tions of parts will now >be more particularly described
with reference tc the accompanying drawingsand pointed
vided for that purpose. The amount of material removed
out in the claims. It will be understood that the par
from the shoe at any particular point or on any particular
ticular machine embodying the invention is shown by
shoe depends on a number of factors, for example, the
way of illustration only and not as a limitation of the
amount of lasting allowance, the accuracy of the location
of the box toe and thelining relative to the upper, etc. 70 : invention. _The .principles and features of-this invention
may be employed in varied and numerous embodiments
Consequently, in some instances a substantial amount of
Vwithout departing from the scope of theinvention.
material may be trimmed or in others only a mere sliver
During Athe trimming operation performed byrthe >Hill
3,024,482
3
4
In the drawings,
FIG. l is a side elevation, partially in section, of the
head portion of a trimming machine embodying the in
spring 46 by which the pincers are urged inwardly, the
pass upwardly beyond their bearings in the head 10 and
vention;
have secured to their upper end portions, arms 58, 60.
FIG. 2 is a plan View of the mechanism shown in
FIG. l;
FIG. 3 is a sectional view taken on the line III~IH
of FIG. l; and
FIG. 4 is a side elevation, partly in section, of a por
shafts 4t), on which the bell crank levers 36 are secured,
Pivotally secured on the underside of the arm 53 by a
stud 62 is a block 64 (FlG. 2). A similar block 66 is
pivotally mounted on the arm 60. Threaded into the
block 64 is a sleeve 68 pinned to a rod 70 around which
is located the above-mentioned compression spring 46.
tion of the machine shown in FIG. l on a slightly en~ 10 The end of the rod 79 adjacent the arm 69 is square in
cross section and slides within a sleeve 72 threaded in
larged scale.
the block 66. The spring 46 is compressed between the
The illustrative machine has a head 10 which consti
tutes a cover for the main body 11 of the machine.
sleeves 68 and 72 which are oppositely threaded so that,
as the rod 70 is rotated by means of a hand wheel 74,
The head 10 supports wiper and pincer mechanisms sim
ilar to the wiper and pincer mechanisms of the afore 15 the sleeves 68 and 72 more toward or away from each
other thereby varying the compression of the spring be
mentioned Hill patent.
tween them and consequently varying the pressure of
The wiper and pincer mechanisms include curved
the pincers on the shoe.
wiper plates 12 supported on carrier plates 14 which are
To enable the operator accurately to make adjustments
pivotally mounted on a vertical stud 16 secured in the
head 10. The wiper plates have ñat horizontal under 20 in the compressive force as he operates on shoes of
different leathers there is provided a disk 76 which is
surfaces which form a shearing bed which cooperates
ñxed to the rod and registers with scale markings on a
with a knife (not shown), to trim the surplus lining.
The carrier plates 14, and consequently the wiper plates
finger 78 secured on the arm 58.
12, are guided in their pivotal movement by rolls 13
pivotally mounted on the head 10. They derive their
tated, the linger 78 moves with respect to the disk 76
movement from a slide 20 which is reciprocated in a
pression. All of the foregoing mechanism is similar to
guideway 21 secured to the undersurface of the head
10. Connecting the slide 20 to the plates 14 is a pair of
push rods 22, bifurcated end portions of which are pivot
that described in the Hill patent.
As the rod 7i) is ro
to indicate on the scale the comparative amount of com
The wiper and pincer mechanisms hereinbefore de
scribed are, with the exception of the cams 28 and 56, the
rIhe 30 slide 44 and its bracket 50, mounted in the head 10 and
ally connected to the plates 14 by fulcrum pins 24.
opposite ends of the push rods slide freely in lugs 25
depending from the slide 20, and coil springs 26 sur
round the push rods, being compressed between the lugs
25 and shoulders adjacent to the said bifurcated end por
tions. When the slide 20 is moved toward the right, as
seen in FIG. 2, by the rotation of a cam 28 which en
gages a cam follower in the form of a roller 3€) jour
naled on the slide, the springs are compressed and the
consequently, when the head is raised from the body 11
in a manner hereinafter to be described, the pincers and
wipers will be raised whereupon the rollers 30 and 42
become disengaged from the cam 28 and the slide 44, re
spectively.
For the purpose of facilitating the removal of lining
materials which may find their way into the mechanism
and thereby cause jamming, the head 10 of the illustra.u
wipers swing inwardly to engage the shoe under spring
tive machine is hinged to the machine frame by a hinge
pressure, the slide being returned by a spring 32 as a 40 pin 80 which passes through lugs 82 on the head and
lower portion of the cam comes into engagement with
lugs 84 provided on the frame. The head is ñxed in
the roller 30, to open the wipers as the machine comes
operating position by releasable locking means in the
to rest.
form of two screws 86 which enter threaded holes in
The illustrative machine is provided, as is the Hill
the machine frame at the operating or right-hand end of
machine, with a pair of yieldable pincers 34 (FIG. 3)
the machine as seen in FIG. 2. The head is provided with
which cooperate with side spreaders and tip spreaders
two counter-balancing members 88 each of which com
(not shown) but described in detail in the Hill patent to
prises a downwardly extending post 90, an upper end
grip the upper materials, tension them over the last and
portion of which is pivotally connected to a lug 92
spread them outwardly of the shoe against the flat hori
formed on the underside of the head 10. The lower ends
zontal undersurfaces of the wipers which act as a shear 50 of the posts extend through holes in a bracket (not
ing bed. The pincers 34 are pivotally secured to the end
shown) secured to a lower portion of the body frame.
portions of arms of a pair of bell crank levers 36 and
The upper portion of each post is threaded to receive
are urged by springs 38 into contact with stop faces
a nut 94. A spring 96 is compressed between the nut
provided on the end portions of the arms. The levers
94- and the bracket, the degree of compression of which
36 are pivoted on the lower ends of shafts 40 which are
journaled vertically in the head 16. The second or
shorter arm of each bell crank lever 36 carries a roller
42 which is engageable with an end of a slide 44. The
is adjusted by rotating the nut, so that the weight of
the head is supported by the springs. The head can thus
be raised about the hinge with little or no effort on the
part of the operator when the screws 86 have been re~
moved from the holes in the frame and will remain in
rollers 42 are forcibly urged against the end of the slide
by an adjustable compression spring 46 hereinafter to 60 the raised position exposing the interior of both the
be described in more detail. The slide 44 reciprocates
head and body.
within a guideway 48 which is carried by a bracket 50
Since the roller 30 on the wiper slide 20 is urged
iixed to a portion of the machine frame in the main body
against
the cam 28 by the spring 32, it will be obvious
11. A cam .follower in the form of a roller S2 is jour
naled on a stud 54 extending upwardly from the slide 44 65 that when the head is raised and the roller 30 is dis
engaged from the cam, the wipers will be opened by the
and engages the periphery of a cam 56 which rotates
with the aforesaid cam 28.
As the cam 56 rotates, a
spring 32 until the adjacent edges of the wiper carrier
plates 14 come into contact with each other. To prevent
recessed portion comes into engagement with the roller
the roller 30 from assuming a position in which, when
52 allowing the slide 44 to be forced by the spring 46
acting on the levers 36, as hereinafter described, causing 70 the head is again lowered, it will be obstructed by the
cam 28, the amount of movement of the slide 20 to the
them to pivot toward each other. This action causes
the pincers 34 to move inwardly toward the side spread
left, as viewed in FIG. 2, is limited. A projection 98
ers and tip spreaders to grip the marginal portions of
is formed on one of the wiper carrier plates limiting
the upper materials against them.
their movement toward each other and hence the left
For the purpose of adjusting the compression of the 75 ward movement of the slide 20. When the machine is
3,024,482
6
stopped bythe one revolution clutch described in -the
Hill patent, the cam 28 occupies the position-shown in
FIG. 2 and the slide 20 is preventedfrom further move
ment to the left‘ofrits FIG. 2' position. This positions the
UnitedStates is:
f1. -A machine Vfor trimming surplus `material from a
roller 30 slightly out of engagement with the -cam 28.
body portion, ahead normally'covering the body portion,
shoemaking instrumentalities'including wipers and pincers
Thus, it will not interfere with the raising and lowering
as new Vand desire to secure by Letters Patent ofthe
partially fabricated -shoe having, in combination, amain
of the head.
To prevent the rollers 42, which as stated above, are
operatively mounted in said head, driving means in the
For this purpose, the aforementioned arms 58 and A60
when the locking Vmeans are released the head may be
are extended beyond the shafts 40 (he. toward the op
erator) and are bifurcated to receive outward vend por
tions of two toggle links 100, 102 to Vwhich they are piv
otally connected bypins 104. The inner end portion of
`the link 102 is ybifurcated îto` receiveïthe inner end por
tion of the link 100'y to which it is'pivoted by means of 20
raised to expose -the interiorportions of thehead and body,
and counterbalancing means between the head and the
body adjacent Vthe pivotallsecuring means for maintaining
the head-in elevated; position.
2. A machine for trimming surplus material from a
partially fabricated shoe having, in combination, a main
body portion including cams for operating the wipers
and pincers, releasable locking means at one endof the
urged against the end of the slide-44 by the-spring'46,
from being moved when the head is raised, into positions 10 head for securing 'the head to the body with the shoe
making instrumentalities in operative relation to their re
in which they will obstruct the closing of the head by
spective drivingmeans, means securing the opposite end
their abutting the top of the slide, means are provided
of the head'tothe bo’dyfforpivotal movement whereby
for holding the rollers out of engagement with the slide.
a pin 106 on the upper end of which is provided a knob
10S. When ‘the toggleis-in the position shown in FIG. 2,
body portion, aheadnormally covering the body portion,
shoemaking instrumentalities including wipers-and pincers
the rollers 42 are maintained in Yengagement with the
operativelyvmounted `in said head, `driving means in the
end of the slide by the spring 46. When the toggle is
“straightened” by the operator and the pin 106 passes
beyond dead center, the links 100, 102 abut the portions
and pincers, releasable locking means at one end of the
110 and 112 of the arms 58 and 60 and pivot the arms
body portion including cams for operating the Wipers
head for securing the head to the body with the shoe
making instrumentalities in operative relation to their re
spective driving means, means securing the opposite end
of the head to the body for pivotal movement whereby
about their `fulcrurn shafts 40. Thus the spring 46 is
compressed and the pincer arms of the bell crank levers
36 are opened and the rollers ‘42 are moved »away from the 30 when the locking means are released the head may be
raised to expose the interior portions of the head and
end of the slide 44. The head can then be raised and
body, and a microswitch operated by the locking means
lowered without interference between the rollers 42 andA
for rendering the driving means inoperative when the lock
the slide 44.
ing means are released.
The safety mechanism referred to in the Hill patent
3. A machine for trimming surplus material from a
by the numbers 418 to 430 inclusive, has been modified 35
partially fabricated shoe having, in combination, a main
in the present illustrative machine to `allow the head to
body portion, a head normally covering the body portion,
be raised. The eccentric lever 114 Iand the rod 116 (cor
shoemaking instrumentalities including wipers and pincers
responding to the lever 426 and the rod 428 in the Hill
machine) are, in contrast with the prior machine, not 40 operatively mounted in said head, driving means in the
body portion including cams for operating the wipers
pivotally `connected but are, in the illustrative machine,
and pincers, releaseable locking means at one end of the
in yabutting relationship, the lever 1-14 bearing upon -a
head for securing the head to the body with the shoe~
face 117 (FIG. 1) provided on the upper end of the
making instrumentalities in operative relation to their re
rod 116. The mechanism still operates in the same man
spective driving means, means securing the opposite end
ner, since when the cover plate 118 is in raised position,
the rod 116 is depressed and prevents the machine from 45 of the head to the body for pivotal movement whereby
being started. When, however, the head is raised, this
safety mechanism is inoperative since the eccentric lever
when the locking means are released the head may be
raised to expose the interior portions of the head and
body, and means automatically operative for disassociating
is supported in the head and is raised therewith and
the wipers from their driving means when the head is
consequently is not in engagement with the top of the
raised
and lowered.
50
rod 116 which rises to its upper position under the ac
4. A machine for trimming surplus material from a
tion of a spring (not shown) and is not operative to pre
partially fabricated shoe having, in combination, a main
vent the 4starting of the machine.
body portion, a head normally covering the body por
However, to ensure that the machine cannot be started
tion, shoemaking instrumentalities including wipers and
when the head is raised there is provided in one of the
pincers operatively mounted in said head, driving means
threaded holes which receive the screws 86 a micro 55 in the body portion including cams for operating the
switch 120 having a plunger 122. The switch is con
wipers and pincers, releaseable locking means at one end
nected to the driving motor, not shown herein, but de
of the head for securing the head to the body with the
scribed in the Hill patent. The circuit is arranged so
shoemaking instrumentalities in operative relation to their
that whenever the screw is not tightened into engagement
respective driving means, means securing the opposite end
with the plunger 122 the switch is open, breaking the 60 of the head to the body for pivotal movement whereby
circuit, thus ensuring that the machine cannot be started
when the locking means are released the head may be
until the head is properly fastened down and the switch
raised to expose the interior portions of the head and
is closed by the end of the tightened screw. When the
body, and manually operated means for disassociating the
head is .securely lixed in operative position, the former
pincers from their driving means when the head is raised
safety mechanism including the lever 114, rod '116 and 65 and lowered.
cover plate 118 is operative.
5. A machine for trimming surplus material from a
In operation, should the illustrative machine become
partially fabricated shoe having, in combination, a main
clogged by waste trimmings, the operator needs only to
push forward the knob 108 to straighten the toggle
thereby withdrawing the rollers 42 out of engagement
with the slide 44 iand remove the screws 86 whereupon
the head is readily raised, exposing the mechanism in
both the head and body which is then easily cleared.
body portion, a head normally covering the body por
tion, shoemaking instrumentalities including wipers and
pincers operatively mounted in said head, driving means
in the body portion including cams for operating the
wipers and pincers, releaseable locking means at one end
of the head for securing the head to the body with the
Having thus described our invention what we claim 75 shoemaking instrumentalities in operative relation to their
3,024,482
8
7. A machine for trimming surplus material from a
partially fabricated shoe having, in combination, a main
end of the head to the body for pivotal movement whereby
body portion and a head secured to the body for upward
when the locking means are released the head may be
pivotal movement to expose interior portions of the head
raised to expose the interior portions of the head and
and body, shoemaking instrumentalities in the head in
body, means automatically operative for disassociating
cluding pincers, bell crank levers mounting the pincers,
the wipers from their driving means, and manually op
means pivotally mounting the bell crank levers in the
erated means for disassociating the pincers from their
head for opening and closing movement relatively to each
operating means when the head is raised and lowered.
other, a reciprocating slide in the body for imparting
6. A machine for trimming surplus material from a
partially fabricated shoe having, in combination, a main 10 movement to the bell crank levers, rollers on the bell
crank levers, spring means acting on the bell crank levers
body portion and a head secured to the body for upward
to urge the rollers into forceful engagement with the
pivotal movement to expose interior portions of the head
slide, and an manually operated toggle linkage operatively
and body, shoemaking instrumentalities in the head in
connected to the bell crank levers to pivot the levers
cluding wiper blades, carrier plates mounting the wiper
blades, means pivotally mounting the carrier plates in the 15 against the force of the spring withdrawing the rollers
from engagement with the slide to permit raising and
head for opening and closing movement relatively to each
lowering of the head.
other, a reciprocating slide in the head operatively con
nected to the carrier plates to impart movement thereto,
driving means in the body including a cam for recipro
References Cited in the file of this patent
cating the slide, a roller on the slide engageable with the 20
UNITED STATES PATENTS
cam, and means for limiting the closing movement of the
Jorgensen _____________ __ July 14, 1953
carrier plates to maintain the roller out of engagement
2,644,967
respective driving means, means securing the opposite
with the cam when the head is raised and lowered.
2,73 6,910
Hill __________________ __ Mar. 6, 1956
Документ
Категория
Без категории
Просмотров
0
Размер файла
745 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа