close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2007274

код для вставки
July 9, 1935.
J. A. JOHNSON
2,007,274
CAM MOTI ON
Filed May 5, 1933
2/ Sheets-Sheet 1
3/
25
v
\\I |
5
78
50
32/
JLSQMQ
M
July 9, 1935.
J. A. JOHNSON
2,097,274
CAM MOTION
Filed May 3, 1933
2 Sheets-Sheet 2
TQQMQ. \o.
‘ah
.
assign.
Patented July 9, V 1935
umree sra'rss a
r7 )OFFICE
32,007,274
CAM-MOTKON
John A. Johnson, Everett, Mass" assignor to
United Shoe Machinery Corporation, Paterson,
N. J., a corporation of New Jersey
.
Application May 3, 1933, Serial Flo. 6535178
17 Claims. ((31. 218-45)
This invention relates to cam-motions, its object relation to the cyclic rate of the operating cam,
being to provide improved means for periodically the modi?er being arranged to modify the opera
modifying the operation of a reciprocatory de
tion of the reciprocatory device in certain cycles '
7
vice that derives its motions in one direction of the operating cam but not in others.
As herein exempli?ed the modi?er is constructed
5 only from a power-driven cam.’
5
In certain complex machine organizations it is and arranged to be effective in a preventive man
sometimes necessary or desirable to modify the ner, that is, by preventing certain movements of
operation of some device or mechanism in certain the devicethat would normally'occur were it‘no't
for the intervention of the modi?er, but in its
For example, when broad aspect the invention is not limited to modi
predetermined cycles of a cam Without such
10 modi?cation in other cycles.
7 ‘
certain types of fastener-inserting machines are ?cation of a preventive character.
used for inserting eyelets or grommets into heavy
When, as herein illustrated, the invention is
and tightly woven fabric one cyle of the fastener embodied in an organization adapted to utilize a
inserting mechanism may be utilized to puncture rotary cam and a rotary modi?er it may advan
the fabric without inserting any fastener, and tageously, comprise other improved features of
another cycle may be utiliaedto insert a fastener combination and arrangement. For example, the
into a hole formed in the puncturing cycle. ' Con combination herein illustrated comprises a rotary
sequently, if the machine includes, as such ma driven cam provided with'a driving gear, a relaé
chines commonly do, automatic mechanism for tively rotatable modi?erprovided with a driven
supplying the fasteners to the‘fastener-inserting gear, the modi?er being mounted on and support
mechanism, it is desirable to provide automatic ed by the hub of the ‘cam, transmission means
means for modifying the normal'operation of the ' arranged to transmit rotation from the driving
fastener-supplying mechanism in the puncturing gear to the driven gear, and a stationary support
cycles by preventing delivery of a fastener in those on which the transmission means is mounted in
cooperative relation to the gears. Such a combi
25
It has been proposed heretofore to equip cer-_ nation may, in’ many cases, readily be attached
tain fastener-inserting machines with latches ar to outstanding machines not originally intended
ranged to prevent operation of fastener-supplying to include any means for modifying the operation
raceways while the fastener-inserting mechanisms of a reciprccatory device. In this light, an at-j
30 are operating to puncture the fastener-receiving tachment of this type may broaden the ?eld of 30
material, but, sofar as I am aware, no such ex utility and increase thee?iciency of fastener-in
pedient has had provision for restoring its race serting machines of certain types by‘rendering
cycles.
way automatically to operation.
U
V
'
On the con
trary, manual intervention has been required for
35 the latter purpose. Consequently, because of their
dependence upon manual tripping to restore the
them especially suitable for inserting fasteners
into heavy woven fabric.
_
'
Referring to the drawings,
35
Fig. l is a front elevation of a fastener-insert
affected parts to regular operation suchexpedi-v ing machine embodying the present invention;
Fig. 2 is a cross-sectional view through the
,
In view of this condition, and in accordance cam for operating a'fastener-supplying raceway
40 with the purpose stated above, the present in and through the means for modifying the effect 40
I '
vention is illustrated herein as embodied in a fully of the cam, see line II—II of Fig. 4;
Fig. 3 is an elevation of the left-hand, side of
automatic mechanism that not only modi?es the
ents have not been entirely satisfactory.
operation of a reciprocated device at regular in
tervals but also restores the device to normal op
45
eration after each modi?cation of its operation,
the cam and modi?er assemblage. and includes
an oscillatory carrier for supporting thejfastener-'_
supplying
raceway;
.
a
.
7
.
,
45
Fig. 4 is a vertical sectional view including the
to the end that no manual intervention will be
cam and the modi?er in front elevation, the mod
required to obtain either of these results. ‘
In one aspect the invention consists in a com i?er being in a non-effective position and the
bination with a reciprocatory device, for example, position of the cam cornesponding to the fas-_
50
50 a fastener-supplying raceway, and a power tener-presenting position of the raceway; and
operated cam having an operating, surface ar
ranged to engage such device and thereby move it
in one direction against an opposed yielding force,
of an automatic power-operated modi?er the
55 cyclic rate of which bears a certain proportional
Fig. 5 represents a different relation of the cam
and the modi?er in which the latter is effective
to prevent the normal operation of the raceway
according to- the design of the cam, the direc
tion of the view being the'same as that of Fig. 4. 55
2,007,274
The general organization of the illustrated ma. material on the pointed projection I8 prior to
chine is similar to that of the machine illustrated the cycle in which a fastener is taken from the
in United States Letters Patent No. 427,557, raceway by the spindle. Accordingly, the novel
granted May 13, 1890, on application of H. H.
Cl Cummings, although the patented machine in
mechanism hereinafter described is provided
to modify the’ operation of the fastener-supplying
cludes work-feeding mechanism and certain unit by rendering the cam ineffectual in alternate
other elements not required for the purposes of
the machine herein illustrated. However, as
shown in said Letters Patent, the frame It is pro
10 vided with a horizontal cam-shaft II arranged
in bearings I2 and is also provided with an over
hanging arm I3 in which guideways are formed
for a vertically movable slide I4. A ?xed horn
cycles of its rotation so that in these cycles the
fastener-inserting tool I9 may be utilized solely
for the purpose of impaling the fastener-receiv
ing material upon the pointed projection I8 to 10
prepare a hole for the reception of a fastener.
To this end, a rotary modi?er 43 is coopera
tively related to the cam 32 and is preferably
or tool-support I5 projects forwardly from the mounted on the hub 35 of the cam as shown in
frame II) to a point under the slide I4 where a Fig. 2. Moreover, the cam-roll 33 laps the pe
fastener-clenching tool or anvil I6 is mounted riphery of the modi?er as well as that of the cam,
on a block IT. The tool I6 is formed with a but when, as in the example herein disclosed, the
pointed central projection I8 the base of which operating conditions are such as to call for non
is surrounded by an annular groove or surface operation of the fastener-supplying device in al
adapted to upset and clench the barrels of eye
ternate cycles of the cam the desired result may ‘
lets or- grommets. The pointed projection I8 is be obtained by rotating the modi?er 40 at a cyclic
adapted to pierce holes in the materials, such as rate one~half as rapid as that of the cam. Ac
heavy fabrics, prior to the insertion of the barrels cordingly, as herein illustrated, the hub 35 of the
of the eyelets or grommets. The slide I4 carries
a fastener-inserting tool I9 of well-known con
cam is provided with .a spur-gear having external
teeth 4| while the modi?er 43 is provided with an
internal gear 42, the diameter of which is twice
as great as that of the gear 4 I . Rotation is trans
mitted from the gear M to the gear 42 by an inter
struction including a central spring-pressed spin
dle 20 adapted to pick an eyelet or grommet from
a raceway and transfer it to the clenching tool
16. A link 2I connects the slide I4 with a crank mediate pinion 43 freely rotatable upon a fixed
30 pin 22 carried by the shaft I I, the connection be
stud 44. This stud projects from a circular plate
tween the link and the slide being formed by a 45 into the annular chamber formed by the gears
pivot-pin 23.
III and 42, while the plate 45 constitutes a closure
A pulley 24, which also serves as a ?ywheel, is for one end of ‘said chamber. A central hole is
loosely mounted on the shaft II, and may be formed in the circular plate 45 to enable the shaft
driven by a belt, The pulley and the shaft are II to extend therethrough, the wall of the hole
provided with a suitable starting-and-stopping having a bearing on the shaft whereby the pin
mechanism (not shown) to put the shaft I I into ion 43 is maintained rigidly at the desired distance
rotation and to stop its rotation when the crank from the axisof the shaft. As shown in Figs. 1, 3
pin 22 is at or near top center.
and 4, the plate 45 is provided with an arm 43
40. The illustrated machine is also provided with through which the stationary rod 26 extends, the
40
a reciprocatory device consisting of a frame 25 plate being thus prevented from turning about
for operating a fastener-supplying unit. The the axis of the shaft II. A set-screw 41 in the
frame 25 is pivotally mounted on a cylindrical rod arm 46 is arranged to engage the rod 26 to secure
or bar 26 a?ixed to the arm I3 above and parallel the plate 45 against sliding lengthwise of the
to the shaft II. Collars 21 (Fig. 3) are arranged shaft.
on the rod 26 to prevent the frame 25 from sliding
It will now be understood that the speed-reduc
lengthwise'of the rod. Bolts or studs 28 extend ing gearing 4|, 42, 43 will cause the modi?er 40
through bosses 29 formed on the frame 25 to- se
to execute one complete cycle of rotation while
cure a detachable fastener-supplying unit com
the cam 32 is executing two complete cycles, and
prising a raceway 33 and a hopper SL The de
that the low portion 50 of the cam (Fig. 5) will be
livery end of the raceway is arranged to present ineffectual in alternate cycles when a high portion
fasteners to the spindle 2D in alternate cycles of of the modi?er is running on the cam-roll. It
the shaft II when the slide I4 is at or near its will also be understood that the low portion 50
highest position, but is retracted from the path of the cam will be effectual only when the low
of the inserting tool I9 during the downward portion 5| of the modi?er is passing the cam-roll
strokes thereof. For this purpose, the shaft II as represented in Fig. 4. In operation, the low
is provided with a cam 32 the periphery of which portion 58 of the cam and the lower portion SI of
is arranged to operate against a roll 33 carried by the modifier both pass the roll 33 at the same
the frame 25 and connected thereto by a stud time once in each two cycles of rotation of the
60 34. A pin 35 extends through the hub 36 of the cam, thus permitting the spring 31 to move the
cam and through the shaft II to secure the cam delivery end of the raceway to its fastener~pre—
rigidly to the shaft. The delivery end of the race senting position as shown in Fig. 1. The positions
way is normally moved to its fastener-presenting of the cam and the modi?er under these condi
position by a tension spring 31, the lower end of tions are shown in Fig, 4.. Although the cam
which (Fig. 1) is attached to an anchoring pin occupies the same position in Fig. 5 as in Fig. 4,
38 and the upper end to a pin 39 carried by the the position of the modi?er is 180 degrees from
frame 25.
the position shown in Fig. 4.
Fig. 5»
Since the cam 32 and the crank-pin 22 are both represents the initial conditionsTherefore,
under which a
rigidly related to the shaft II the normal and work-piece will be presented to the machine for‘
. usual mode of operation would result in present
the insertion of a grommet.
ing a fastener to the spindle 23 in each cycle of
Assuming that the roll 33 is held initially away
the shaft, but for certain purposes, as when using from the low portion 50 of the cam by the high
the machine to insert grommets in the heavier portion of the modi?er as shown in Fig. 5, the de
grades of ‘woven fabric such as duck and canvas, livery end of the raceway will be initially re
11; is desirable to impale the fastener-receiving tracted from the position represented in Fig. 1.
3
2,007,274
If, now, the operator places an article of work arranged to engage and disengage said'device'
on the pointed projection l8 and depresses a periodically, and means arranged to drive said
clutch-controlling treadle (not shown) through a modi?er at a'cyclic rate different from that of
pericdthat will insure two cycles of rotation of said cam.
'
the shaft H, the machine will operate as follows.
4. The combination with a reciprocatory de
The fastener-inserting tool I9 will descend with vice and a rotary power-operated cam a surface
out having any grommet on its spindle 2E} and of which is arranged to move said ‘device in one
will force the grommet-receiving material down
irection against an opposed yielding force, of a
to the level surface of the clenching tool IS, the rotary modi?er having an operating surface ar~
10 pointed projection‘ I8 ‘being ‘thereby forced ranged to engage and disengage said device pe 10
through the material and into the bore of the tool riodically, and reducing gearing‘ by Which rotation
Hi. The latter tool will immediately rise, leaving is transmitted from'said cam to said modi?er.
the material on the projection l8. During this
5. The combination with areciprccatory de~
cycle of the shaft II, the modi?er 40 willrotate vice and a rotary power-operated cam a surface
15 through 180 degrees from the position shown in of which is arranged to move said device in one 15
' Fig. 5 to that shown in Fig. 4, its low portion 5! direction against an opposed yielding force, of
being thereby brought to‘ a point that will enable a rotary modi?er coaxially related to said cam
the cam-roll 33 tov roll on the low portion 59 of _ and having an operating surface formed and are
the cam. The delivery end of the raceway will ranged to engage and disengage said device pe
therefore move to its fastener-presenting position riodically, and means arranged to drive said 20
(Fig. 1) under the influence of the spring 31'. As modi?er at a cyclic rate different from that of
the second cycle of the shaft begins the spindle
said cam.
.
2U enters the barrel of the grommet then sup—
6. The combination with a reciprocatory de
ported in alinement with it, and the operation vice normally moved in one direction by a yield
proceeds in the usual manner, the cam 32 being ing force, of a rotary cam and a rotary modi?er 25
'
40
45
50
55
60
65
effective at this stage to retract the delivery end coaxially related and having peripheral operat
of the raceway in time to clear the tool 19, the ing surfaces both arranged to act on said device
barrel of the detached grommet being inserted in opposition to said yielding force, and means
through the material previously pierced by the by which said cam and said modi?er are driven
projection 18, and the lower end of the barrel at different cyclic rates.
of the grommet being upset and clenched by the
7. The combination with a reciprocatory de—
annular groove or surface in the tool l6. During vice normally moved in one direction by a yield
the latter half of the second cycle of the shaft l I ing vforce, of a rotary cam provided with a gear,
the low portion 59 of the cam is again brought a' rotary modi?er coaxially related to said cam
to the position shown in Fig. 5, but at this stage and provided with a gear, means arranged to
the high portion of the modi?er 410 becomes effec transmit rotation from one of said'gears to the
tive again to maintain the delivery end of the other, and a static-nary support by which said
raceway in its retracted position, to the end that transmission means is maintained in cooperative
once more the inserting tool I!) may not receive relation to said gears, said cam and said modi?er
a grommet until the third stroke ‘of its‘next four hving operating surfaces both arranged to act
stroke cycle of operation. From the foregoing it on said device in opposition to said yielding force.
will be understood that they modi?er 40 engages
8. The combination with a reciprocatory device
and disengages the roll 33 periodically with the normally moved in one direction by a yielding
result that in alternate cycles of rotation of the force, of a rotary driven cam provided with a hub
cam 32 the roll 33 is controlled by the modi?er, and with an external spur-gear, a rotary modi?er
Whereas in the other cycles the modi?er relin
arranged on said hub and provided with an in
qui'shes its control to permit the roll to operate in ternal spur-gear larger than said external gear,
the normal manner according to the design of an intermediate gear arranged to transmit rota
the cam.
tion from said external gear to said internal gear,
Having thus described my invention, what I and a stationary support by which said inter
claim as new and desire to secure by Letters Pat
mediate gcar is maintained in cooperative rela
ent of the United States is:
tion to the other said gears, said cam and said
1. The combination with a reciprocatory de modi?er having operating surfaces both ar
vice and a power-operated cam having an op ranged to act on- said device in opposition to said
erating surface arranged to engage said device yielding force.
and thereby move it in one direction against an
9. In a machine for inserting fasteners, auto
opposed yielding force, of an automatic power matic fastener-inserting mechanism, a recipro
operated modi?er the cyclic rate of which is dif catory fastener supplying device spring-stressed
ferent from that of said cam, the modi?er being in one direction to present fasteners to said mech
arranged to modify the operation of said device anism, a. power-operated cam arranged to retract
in certain cycles of the cam but not in others.
said device, and power-operated mechanism ar
2. The combination with a reciprocatory device
ranged to restrain said device in a retracted posi
and a power-operated cam having an operating
surface for moving said device in one direction tion during alternate cycles of said cam and to
against an opposed yielding force, of 1a power release said device for normal operation during
'
operated modi?er driven at a cyclic rate different the other cycles of the cam.
10. In a machine for inserting fasteners, auto
from that of said cam, the modi?er being ar
ranged to engage and disengage said device pe matic fastener-inserting mechanism, a recipro
riodically to modify its operation in certain cy c'atory fastener-supplying device spring-‘stressed
in one direction to present fasteners to said mech
cles of said clam but not in others.
3. The combination with a reciprocatory device anism, a rotary power-operated cam arranged to
30
40
45
50
55
60
65
70
and a rotary power-operated cam a surface of retract said device, and power-operated mecha
which is arranged to move said device in one nism including a rotary modi?er the rotational
direction againstan opposed yielding force,.of rate of which is one-half that of said cam, the
a rotary modi?er having a surface formed and modi?er being arranged to modify the operation 75
4
2,007,274
of said device in alternate cycles of said cam driving gear, said gears forming an annular
but not in the other cycles.
chamber, a transmission gear arranged in said
11. In a machine for inserting fasteners, auto chamber and cooperating with said gears, and a
matic fastener-inserting mechanism, a reciproca
stationary support arranged to close one end of
tory fastener-supplying device spring~stressed in said chamber, said transmission gear being rotat
one direction to present fasteners to said mech ably mounted on said support.
anism, a rotary power-operated cam arranged to
15. In a machine provided with a rotary driven
retract said device, a rotary modi?er, and means shaft and a reciprocatory device normally moved
arranged to drive said modi?er at a speed one in one direction by a yielding force, an operating
II) half as great as the speed of said cam, said modi
mechanism comprising two relatively rotatable 10
?er being arranged to modify the operation of members one of which is nested in the other and
said device in alternate cycles of said cam but carried by said shaft, and gearing arranged to
not in the other cycles.
transmit rotation from said shaft to the outer
12. In a machine for inserting fasteners, auto one of said members, with a reduction in angular
matic fastener-inserting mechanism, a reciproca speed, one of said members having a cam sur 15
tory fastener-supplying device spring-stressed in face arranged to operate said device, and the
other member having an operating surface ar
one direction to present fasteners to said mecha
nism, a rotary power~operated cam arranged to ranged to modify the operation of said device in
retract said device, a rotary modi?er in contigu certain cycles of said cam member but not in
20
‘ one and coaxial relation to said cam, and mecha
others.
16. A cam-motion for operating a reciprooatory
nism arranged to drive said modi?er at a rate dif
ferent from that of said cam, said modi?er being device against an opposed yielding force, comp ris
formed and arranged to restrain said device dur~ ing a rotary cam and a relatively rotatable modi
ing alternate cycles of said cam but not during ?er formed to be nested one in the other and hav~
in <4 the other cycles.
ing operating surfaces arranged to function side 25
13. In a machine for inserting fasteners, auto by side, a driving gear and a driven gear carried
matic fastener-inserting mechanism, a reciproca one by said cam and the other by said modi?er,
tory raceway spring-stressed in one direction to transmission means for communicating rotation
present fasteners to said mechanism, a cam and a from said driving gear to said driven gear, and a
modi?er relatively rotatable about a common stationary support for maintaining said trans
axis, the one to retract said raceway and the mission means in cooperative relation to said
gears.
other to restrain the raceway in a retracted po
17. A cam-motion for operating a reciprocatory
device against an opposed yielding force, com
prising a cam and a modi?er arranged side by
side and relatively rotatable about a common axis,
the cam and the modi?er having peripheral op
device normally moved in one direction by the erating surfaces each arranged to engage and dis
engage said device periodically, and means by
force of a spring, an operating mechanism com
prising a rotary power~operated cam having a which said cam and said modi?er are rotated at 40
unequal speeds to produce a differential operation
hub and a driving gear atone end thereof. a rela
'
tively rotatable annular modi?er arranged on said of said device.
JOHN A. JOHNSON.
hub and having an internal gear surrounding said
sition, and mechanism by which said cam and
said modi?er are operated at unequal speeds such
as to prevent operation of said raceway in alter
nate cycles of said cam.
14. In a machine provided with a reciprocatory
Документ
Категория
Без категории
Просмотров
0
Размер файла
812 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа