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Патент USA US3043178

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July 10, 1962
3,043,1 68
T. I_. MAY ET AL
RIVETING~ MACHINE
Filed Nov. 27, 1959
5 Sheets-Sheet 1
53
38
IIHIIIIIIIH
11:?
INVENTORS
Thomas. L. May
FIG. 1
BY
Robert H. Zcnkl
giom; M. @414.
Arrakxvs‘f
‘
July 10, 1962
T. |_. MAY ET AL
3,043,168
RIVETING MACHINE
Filed Nov. 27, 1959
5 Sheets-Sheet 2
INVENTORS
FIG. 6
THOMAS L. MAY
BY
ROBERT H. ZANKL
Arm/ave?
July 10, 1962
3,043,168
T. 1.. MAY ET AL
RIVETING MACHINE
5 Sheets-Sheet 5
Filed Nov. 27, 1959
q...___
FIG. 9
INVENTOR.
Thomas L. May
By
Robert H.Zc1nkl
July 10, 1962
T. L. MAY ET AL
3,043,168
RIVETING MACHINE
Filed Nov. 27, 1959
V'
.5 Sheets-Sheet 4
:
INVENTORB
Thomas L. May
By
Robert H. Zcmkl
gwu 10.6%,‘
I
ArTDRA/EY
Juiy 10, 1962
T. L. MAY‘ ET AL
3,043,168
RIVETING MACHINE
Filed Nov. 27, 1959
5 Sheets-Sheet 5
FIG- 15
v. 5%
_ ,4 TraR/vefr
3,®43,ld8
1
United Etates Patent 0 ice‘
Patented July 10, 1962
1
2
3,043,168
FIGURE 2 is an enlarged fragmentary side elevation
of the lower end of a rivet trackway embodied in the
RIVETING MACHENE
Thomas Leslie May and Robert H. Zankl, Miami, Fla,
assignors, by mesne assignments, to US. Rivet Ma
chine Corporation, Chicago, BL, a corporation of Hit
nois
invention,
‘FIGURE 3 is a plan view of the structure illustrated
in FIGURE 2,
FIGURE 4 is a transverse section taken on line 4-4
of FIGURE 8,
FIGURE 5 is an enlarged fragmentary sectional view
taken through the upper portion of the machine, parts
This invention relates to an improved riveting machine 10 being shown in elevation and parts omitted, for sake of
having in combination a hopper for the support of the
clearness,
rivets, a driver mechanism for setting the rivets, a rivet
FIGURE 6 is a horizontal section on line 6-6 of
holder that initially receives and supports the rivets
FIGURE 13,
prior to the actuation of the driver mechanism, an anvil
FIGURE 7 is a transverse section taken substantially
and an adjustable trackway for conveying the rivets from 15 on line 7——7 of FIGURE 1,
the hopper to the rivet holder, all in timed sequence'
FIGURE 8 is a vertical section taken substantially on
The invention contemplates a base forming ‘column
line 8-8 of FIGURE 7, parts being shown in elevation,
that supports the various components of this mechanism,
FIGURE 9 is a horizontal section taken substantially
including a novel form of hopper device that is provided
on line 9——9 of FIGURE 8,
with feed mechanism adapted to deposit the shank por 20 FIGURE 10 is a fragmentary vertical section through
tions of the rivets into an inclined trackway that func
a driver mechanism and a cooperating anvil, parts being
tions to deliver the rivets by gravity to the point of ejec
shown in elevation,
tion, where they are deposited into a rivet holder and
FIGURE 11 is a section taken on line 11—11 of FIG
with means associated with the hopper and the track
URE 10, parts being shown in elevation,
way that functions to prevent rivets being fed to the 25 FIGURE 12. is a horizontal section illustrating an
trackway in an improper manner and to prevent the
ejector mechanism,
jamming of rivets in a manner whereby the rivets are
FIGURE 13 is an enlarged fragmentary section through
compelled to enter the trackway with their shank por
a guide housing and associated parts embodying a driver
tions disposed in the trackway.
device and a rivet holder and illustrating the ejector
The invention further contemplates a novel form of 30 mechanism that is operative under the in?uence of the
Filed Nov. 27, 1959, Ser. No, 855,619
4 Claims. (Cl. 78—4~8)
trackway for conducting the rivets from the hopper that
is adjustable laterally in accordance with the diameter
of the shank portion of the rivets and also adjustable
Vertically to accommodate the trackway to rivets of vary
driver,
ing dimensions and to form a guiding clearance for the 35
FIGURE 15 is a fragmentary side elevation of a driv
er head and associated coupling means between the driver
head portions of the rivets.
FIGURE 14 is a fragmentary vertical section through
a rivet holder and illustrating a driver in the operative
engagement with a rivet supported within the holder and,
The invention further contemplates a novel driver
and a rivet holder.
mechanism in combination with a rivet holder and with
Referring speci?cally to the drawings, the numeral 5
the driver being actuated to and from a driving position
designates a base column, usually of hollow cast forma
by a rocker arm that is pivotally supported at a point 40 tion that carries a foot 6 for ground support of the de
within an extension of the column to minimize any ?exi
vice. Bolted or otherwise rigidly connected to the column
bility in the extension when the rocker arm is actuated
5 is a casting extension 7. The casting 7 is provided with
to move the ‘driver downwardly. The invention further
a hollow lateral extension- 8 carrying at its outer end and
contemplates a driver mechanism that is supported with
rigidly supported in depending manner, ‘a guide housing 9‘,
in a guide device carried upon an upper extension of 45 for a purpose to be presently described. Bolted or other
the column to be reciprocated in a vertical manner un
wise rigidly connected to the forward side of the column
der the in?uence of the rocker arm and with a novel form
5, is a bracket arm 10, having an outer cylindrical head
of rivet holder that has a ‘cooperative relation with the
portion 11 that is vertically bored and threaded to receive
driver and whereby the rivet holder is actuated under the
a threaded shank 12, constituting the body for an upper
in?uence of the driver to and from a point adjacent to 50 cylindrical anvil 13. The anvil is of conventional con
the discharge end of the trackway whereby the rivet
struction and the anvil and the body 12 are axially bored
holder is disposed in a position to receive a rivet from
to receive a rivet positioning pin 14, that carries at its
the trackway when the driver is in an uppermost posi
lower end a piston head 15, that is biased upwardly by a
tion and, when the driver moves downwardly, the rivet
compression spring 16, whereby the pin is normally pro
holder is yieldably forced downwardly to a point where
jected axially above the anvil 13 to engage the usual hol
the supported rivet engages a work-piece to be riveted.
low shank portion 17 of a conventional rivet 18. The
The invention contemplates a novel ejector mechanism
rivet 18 has the usual rounded head 19. A suitable lock
for ejecting a lowermost rivet from the trackway to the
nut 20 functions to lock the body 12 at a predetermined
rivet holder, such mechanism being actuated under the
elevation above the head 11 whereby to accommodate the
in?uence of the movement of the driver and with the rivet 60 positioning of the anvil in accordance With the particular
holder being adjustable in its travel in accordance with
rivets being employed and in ‘accordance with an ad-'
a particular size of rivet being employed.
Novel features of construction and operation of the
.
Mounted upon the upper portion of the column ex
device will be more clearly apparent during the course
tension 7 in any suitable manner, is a rivet holding hop
of the following description, reference being had to the
65 per 21. The hopper 21 carries a closure cover 22. The
accompanying drawings, wherein has been illustrated a
bottom wall of the hopper is inclined at 23 and whereby
preferred ‘form of the device and wherein like charac
the rivets 18 are fed by gravity toward a loading mech
ters of reference are employed to denote like parts
anism. The opposite side walls of the hopper 21 are
throughout the several ?gures.
slotted to receive the upper end portion of a rivet receiv
In the drawings:
FIGURE 1 is a perspective view of a riveting ma
chine constructed in accordance with the invention,
justable rivet holder, to be described.
ing and conveying trackway indicated as a whole by the
numeral 24. The trackway 24 bisects the hopper in an
inclined manner to receive the rivets that are to be guided
3,043,168
.
.
3
4
downwardly through the trackway by gravity. Means are
provided to pick up the rivets from the hopper to dump
rotating in a clockwise direction, any rivets that tend
them over upon the trackway, such means comprising 1a
to enter the trackway in an endwise manner, will be dis
between the bars 47 and, since the wheel 40 is constantly
lodged by the wheel 40 and thrown backward into the
veled, as indicted at 26 and withthe bevel conforming to 61 hopper. 'The lower end of the trackway is ?xedly con
nected to a block 57, carried by a lower extension of the
the inclined bottom 23. The plate 25 traverses a suit
guide housing 9 thus ?xedly supporting the lower end of
able trackway 2,7. The plate 25 in its lowermost position
the trackway whereby a lowermost rivet is ejected in
disposes its beveled end in substantially ?ush arrangement
timed sequence to a rivet nest or holder, to be described.
with the inclined bottom 23, where it will pick up a
Adapated to traverse the guide housing 9 is a vertically
plurality of rivets from the hopper to be subsequently ‘
dumped on to the top of- the trackway 24. The plate
movable driver head 58. The head 58 has a lower semi
cylindrical extension 59 terminating in a cylindrical riv
25 is oscillated by "a crank arm 28 that is journaled at its
eting punch 60._ The punch ‘60 is provided at its'lower
lower end by a stud 29, carried by the plate 25 and its
end with a concave recess 61, conforming generally to
upper end is journaled at 30, upon alug carried by grooved
the rounded head 19 of the rivet. The drive head 58 is
pulley 31. The pulley 31' is journaled upon' a suitable
stub shaftl32 carried by one adjacent wall of the hopper
oscillated in a vertical plane by a pivotal link connection
21; ' The pulley 31 is relatively large in diameter and is
62, connected to the outer end of a rocker arm 63. The
rocker arm 63 is pivotally supported at 64 upon a bearing
driven from a smaller pulley 33, carried upon a shaft 34,
that is suitably journaled for rotation in bearings carried
member 65 that is rigidly supported within the extension
18 closely adjacent to the column extension 7. The
by wall extensions of thehopper 21., The shaft 34 is
shuttle plate~25. The plate 25 at its upper ‘end is be
driven by relatively large grooved pulley 35, through the
medium of an endless belt 36, from a drive pulley 37,
rotatable under the in?uence of a suitable prime mover
38. The drive connection between the pulleys 32 and
rocker arm is actuated in a vertical plane through the
medium of a crank arm 66, pivotally connected at 67 and
with the crank arm 66 being carried by an eccentric band
68, engaging an eccentric 69, fast upon a drive shaft 76.
The shaft 70 is driven from a pulley 71, having a suitable
endless'belt connection with a prime mover 72, ‘?xed
into the receiving end of the trackway 24, comprising a
upon a bracket 73, adjustably supported upon the rear
kick-off wheel 40, fast upon a shaft 41. The wheel 40
portion of the column extension 7. The shaft 70* is suit
overlies the tnackway 24 and is provided with a circurn-.
ably journaled with respect. to the extension 7 and any
ferential group of relatively sharp and transversely extend 30 suitable clutch mechanism may be employed between the
ing teeth 42., The wheel 40 is driven in a clockwise di
pulley 71 and the shaft that is intermittently actuated by
rect-ion or, in opposed relation to the travel of the rivets
a foot treadle 74, such construction being conventional
33 is in the form of _an endless belt 39.
'
'Means are provided to prevent the jamming of rivets
through the trackway. The wheel 40 is spaced above the
trackway a distance capable of‘permitting the passage of
the rivet head 19 beneath the wheel whereby to permit
' the free ?ow of rivets downwardly by gravity through the
track.
The shaft 41 ,is suitably journaled with respect .
to ithe'hopper and is provided with variablespeed ratio
drive means, including stepped pulleys 43, driven‘ from
a group of step pulleys 44, carried upon’ the shaft 34. 40
The pulleys 43 are alternately driven through the medium
of an endless belt 45.
The shaft 41 is extended out
wardly beyond the pulleys'43 and is provided with a
knurled hand wheel 46, whereby the shaft 41 may be
manually rotated.
The trackway 24, see particularly FIGURE 4 embodies
and well known in the art, The vertical movement of
the driver head 58 is thus actuated to and from a driving
position upon the actuation of the treadle 74.
Also movable in guided relation with respect to the
guide housing 9 is a rivet holder, having a shank portion
75, having one ?at side that has cooperative sliding en
gagement with a ?at side 58' of the head 58.
The rivet I
holder 75 is actuated in a vertical plane under the in
?uence of the movement of the head 58. This coopera
tive movement is accomplished by forming a semi-cylin
drical groove 76 within‘ the ?at face of the head 58 and a
corresponding semi-cylindrical groove 77 in the rivet hold
er 75‘and with the grooves cooperating to form an elon- '
gated cylindrical recess. 'Mounted within the cylindrical
a pair of generally rectangular bars 47 that are normally
spaced apart to provide a clearance for the shank por
tions '18 of the rivets. The bars 47 are adjustable toward
recess formed by the grooves 762ml 77, are upper and
lower plugs 78 and 79, that are, biased apart by a coil
spring 80. As will be observed in FIGURE 13, the upper
and from each other through the mediumrof- an adjusting 50 plug 78 is biased to a seating engagement in to the end
screw 48., The adjusting screws 48 are at predetermined
portion of the groove 77, while the lower plug 79 is
spaced points throughout the trackway. The screws 48
biased toga seating engagement in the lower end of the
are adjustable through the‘rnedium of a knurled head 49
groove 76 thus providing a lost motion connection be
and a'friction spring 50 is disposed upon the screw 48
tween the head 58 and the shank 75 of the rivet holder.
to‘bear against the head'49 and the side of an adjacent
The rivet holder 75 at its upper end is provided with a
'bar 47 ‘whereby tov ‘frictionally hold the screws against
lateral extension 81 that'contacts. an upper limit screw
7 accidental movement.
Means7 are also providedrto form
82 and alower limit screw, 83 that de?nitely limits the
a‘ guide clearance for the head 19 of the rivets and to,
maintain the rivets in accurate guiding movement through
the slot formed by the spacing of ‘the bars 47. Such
upward and downward movement of the rivet holder. It
being Vunderstoodof course that the driver head 58 par
means embodies an upper bar 51,, that extends for the
justment of the screws 82. and 83,_they are ?xed against
major length of the‘ trackway and that overlies the slot
formed-by the bars 47. The bar 51 is vertically adjust- a
movementbvset screws 84.
able‘ to accommodate the heads 19 of rivets of varying
takes of a constant movement up and down. After ad
~
Connected with the lower end of'the rivet holder 75
upon opposite sides, are a pair-of ?exible plates 85, riv
sizes. The means for adjusting the bar 51 comprises 65 eted or otherwise connected thereto. a The plates 85 are
screws 52, that vare threaded into one bar 47 and rotatable
?xedlyiconnected at their lower ends to a pair of coopera
under’ the in?uence of a knurled head, 53. A friction
tive rivet seat forming members 86, that forma yielda-ble
spring 54 is disposed between a bearing lug 55 carried
' by the bar 51 and the knurled head 53 whereby the screw
is held in'accurate'adjusted position. The bar 51 'termié
nates at its upper end in a circumferential slot 56 formed
in the wheel 41} substantially intermediateiits-‘width, The
rivet receiving nest during the operation of the device.
Each of the members .86 have their opposed walls tapered
at 87, to jointly form a taper socket forthe reception of
the rivet. Each‘ of the sockets 87 are notched at their
lower ends, as at ‘88 to receive the shank portion 18 of
terminal end of the bar 51 as disposed in the slot 56 ' the rivet and with thehead 19 of the rivet being tem
functions to prevent rivets from entering the trackway .
porarily supported upon the taperside walls of each of the
in a manner that would permit the rivet to be jammed 75 members 86.
3,043,168
Means are provided to eject a lowermost rivet from the
it falls downwardly to be centered by the taper walls 37.
trackway 24 at its lower end, comprising an ejector bar
Now, with a workpiece disposed upon the anvil 13, rest
89, that traverses a rectangular opening 90 formed in the
ing upon the projecting end of the centering pin 14, the
block 57. The bar 89 at its outer end is provided with a
operator actuates the foot treadle 74, in turn shifting the
lateral extension 91 that bears against a pin 92, shiftable 5 clutch for rotating the shaft 70 for one revolution, the
in a bore 93 of the block 57 and biased in an outward
rotation of the shaft 70 actuates the eccentric 69 to rock
the rocker arm 63 upon its pivot 64, forcing the driver
head downwardly and carrying with it the shank 75 of the
rivet holder. The head 58 and the shank 75 continue
their downward movement until the notches 88 of the
rivet holder are in axial alignment with an aperture in
In the ejecting position, the head 95 is driving the rivet
the workpiece to be riveted. The rivet nest, as before
toward the rivet nest, while the body of the bar 89 over
stated is limited in its downward movement by the lower
rides the next adjacent rivet to maintain the group of
limit screw 83, to such position where it closely overlies
rivets from a further downward movement until such
time as the bar 89 has been retracted under the in?uence 15 the workpiece to be riveted. With the rivet holder being
shifted to its lowermost position, the driver head con
of the spring 94. The means for shifting the bar 84,
tinues its downward movement, causing the punch 60
comprises a bell crank lever 96, that is pivoted at its up
to engage the head of the rivet, forcing it downwardly
per end, as at 97 to the guide housing 9 and with the
through the rivet nest, such action being possible by the
lower terminal end of the lever 96 bem'ng against the
movement apart of the nest forming elements 86 and a
outer terminal end of the bar 89. The crank 96 is biased
continued downward movement of the punch, drives the
in a direction to shift the bar 89 to a rivet ejecting posi
rivet to an axial contacting engagement with the pin 14
tion, by relatively heavy coil spring 98, hearing against
and then continues its downward movement, to force the
the crank 96 and the end wall of a generally U-shaped
rivet into engagement with the anvil 13. Immediately
bracket extension 99 carried by the lower extension of
the housing 9. Means are provided to rock the arm 96 25 upon the completion of the riveting action, determined
by the movement of the rocker arm 63, the head 58 is
against the tension of the spring 98, that comprises a
then elevated carrying with it the shank 75 of the rivet
roller 100, journaled in a forked bracket 101 carried by
holder upwardly until it contacts the upper limit screws
the crank 96 and operable through a slot 102 formed in
82, in which position the rivet nest is in direct alignment
the housing extension. The roller 10%} projects into the
path of movement of the driver head 58 so that, when the 30 with the discharge end of the chute 24 and in the upper
movement, the head releases the roller 19%), causing the
head 58 is shifted downwardly to the riveting position,
bell crank lever 96 to be biased forwardly by the spring
the head 58 will bear against the roller 1139, shifting the
98, actuating the ejector bar 89 to quickly eject another
crank 96 rearwardly against the tension of the spring 98
rivet into the nest. Such movement also covers the'
and permitting the bar 89 to be moved rearwardly under
next adjacent rivet to prevent jamming of the mechanism.
the influence of the pin 92 and the spring 94 to permit
The several parts move in timed sequence, having in mind
a lowermost rivet to be disposed into the path ofmove
the movement of the driver head and the movement
ment of the punch 60. When the head 58 is again shifted
of the rivet holder together ‘with the movement of the
upwardly, the spring 98 forces the lever 96 forwardly
crank arm 96 to a release position with respect to he
moving the bar 89 forwardly to inject a lowermost rivet
ejecor bar 89 as the driver head moves downwardly and,
into the rivet nest, it therefore being seen, that the spring
direction by a spring 94. The bar 89 is movable in di
rect alignment with the rivet nest and is cut away at its
forward end to form an ejector head 95 that is adapted
to engage and drive the lowermost rivet into the rivet nest. 10
98 functions to fully actuate the bar 89 to a rivet ejecting
position. With the rivet disposed within the nest, the
mechanism is actuated to energize the clutch mechanism
for driving the shaft 70 and the eccentric 68, causing the
rocker arm 63 to move the head 58 downwardly, and, as
the head 58 moves downwardly, at a predetermined tim
as before stated, as the driver head moves upwardly, it
leaves the roller 109 and permits the crank arm 96 to
actuate the ejector bar 89 to project another rivet into the
nest. The ejector bar 89 is held in its forward or its eject
ing position whenever the driver head 58 is in an upper
position, thus preventing a further feed of the rivets down
wardly through the chutes. The foot treadle 74 is momen
tarily actuated to control the clutch, now shown, for a
ing, the head 58 overrides the roller 109, moving the
crank 96 rearwardly and permitting the ejector bar 89
single revolution of the shaft 70 for each subsequent
to be retracted, permitting another rivet to move down
wardly to the lowermost point in the trackway 24. A 50 operation depends upon the movement of the treadle 74.
The shaft 34 and the shaft 41 are coiitinuously actuated
continued downward movement causes the lower plug '79
under the in?uence of the prime mover 38, functioning
to contact the bottom of the groove 77, picking up the
to continuously oscillate the shuttle plate 25 and to con
shank 75 of the rivet holder and moving the riveting
tinuously actuate the kick-off wheel 40. The speed of the
holder and its supported rivet downwardly toward the
workpiece. With the rivet holder overlying the work 55 shaft 41 may obviously be varied by engaging the belt 45
upon either pair of pulleys 43 or 44.
piece, the head 58 continues a downward movement
Since the device has been adapted to handle rivets of
against the tension of the spring 80, to the point where
varying size, it therefore becomes necessary at times to
the driver punch 60 engages the head of the rivet, forcing
adjust the bars 47 apart to accommodate rivets having
it downwardly through the nest and forcing the members
86 apart to force the rivet through an aperture of the 60 shank portions of different dimensions and also to adjust
the bar 51 to accommodate the head portions of rivets
workpiece and to drive the rivet into riveting engagement
of varying sizes. It is obvious, that with a single ‘adjust
with the article. A reverse movement of the head 58
ment of the track bars, that a single size of rivet will be
carries the shank 75 upwardly where the nest is again dis
adapted thereto. In all other instances, the ejector mecha
posed in alignment with the discharge end of the chute.
The movement of the shank 75 is limited in its upper and 65 nism and the rivet nest will remain in their ?xed capacities
and possibly the only other adjustment that may be found
downward movement by the screws 82 and 83.
necessary is the adjusting of the shank 75 of the rivet
Operation
holder to limit its traverse in either an upward or down
ward position. The shuttle plate 25 is continuously oper
With the hopper 21 ?lled with rivets, the prime movers
38 and 72 are placed in operation. With the prime mover 70 ating so long as the prime mover 38 is energized. To
prevent the group of rivets in the hopper 21 from shift
38 in actuation, rivets are fed into the trackway 24
ing over and on to the top of the trackway, there has
where they will travel by gravity downward to the dis
been provided a ba?ie plate 21a that spans the hopper 21
charge end, where they are held against further move
to be frictionally held upon the side walls of the hopper
ment by the head 95 of the bar 89, it being assumed that
a rivet has been previously ejected into the rivet nest where 75 and that terminates somewhat above the inclined bottom
3,043,168"
"7
23, such bathe plateiila permitting a relatively’ large
setting device and rivet holder‘ each having a mating
groove, yieldable key means jointly engaging the grooves,
quantity of rivets to be disposed within the hopper andv
fed to the trackway by the shuttle 25 in a relatively small
number with each stroke of the the plate 25. Mechani
a rocker arm journaled in a-frame extension and that has
a linked connection with the upper end of the body por
tion, the rocker arm being intermittently actuated to im—
cal elements such as conventional bearings, drive motors
name like form no part of the present invention and
part a driving movement to the rivet setting device, the
movement of the riveting setting device functioning to
shift the rivet holder through the medium of the yield
able key means and adjustable stop means for limiting the
upper and downward movement of the rivet holder.
2. A riveting machine of the character described having
a main frame, a rivet hopper supported, upon the frame,
an inclined chute that communicates with the hopper
whereby to receive and conveyrivets by gravity down
it will be apparent that the several bearings will be
in accordance with the function of the apparatus. It is
' contemplated that the continuous operation of the shuttle
plate 25and the kick-off wheel 40 will maintain the
trackway 24 continuously supplied with rivets and they
will slide downwardly in abutting relation to be stopped
byithe shuttle bar 89 until such time as the mechanism
is actuated to force the driver and the rivet device down
wardly.
15 wardly to a discharge end of the chute, power driven
means associated with the hopper for placing the rivets
It will be apparent from the foregoing that a very novel
in a loading end of the chute, a rivet driving device sup
mechanism has been employed whereby to continuously
and uninterruptedly supply a continuous number of rivets,
with each separate rivet to be ejected upon the upward
movement of, the driver head to be projected into the rivet -
nest ‘where they will be dislodged and forced down
wardly into engagement with the workpiece, all of the
ported by the frame and that is shiftable in a vertical path,
power means for shifting the driving device, a rivet holder
having an expandable rivet nest at its, lower end,7the rivet
holder being yieldably andslidably connected to the driv
ing device, the driving device when in an uppermost posi
tion functioning to dispose the rivet nest adjacent to the
discharge end of the chute, an ejector device'that is mov
of the treadle 74. The movement of the rivets to the 25 able in a path to eject a lowermost rivet in the chute into
the rivet nest, crank means, for ‘shifting the ejector in a
trackway is continuous and separate from the actuating
direction to discharge a rivet, the crank being biased in
mechanism for the driver head and the rivet holder.
one direction by a spring,imearns carried by the crank
It is to be understood that the invention is not limited
that lies in the path of movement of'the rivet setting de
to the precise construction shown, but that changes are
vice whereby the crank is moved laterally upon the down
contemplated as readily fall within the spirit of the inven
ward movement ofrthe setting device to release the ejector,
tion as shall be determined by the scope of the subjoined
the downward movement of the driving device yieldably
claims.
I
shifting the rivet holder and its rivet carrying nest to a
Having described our invention, what We claim asrnew
functions being in the timed sequence calculated to actuate
the mechanism in a predetermined cycle upon movement
point of engagement with "a Work piece that is disposed
and desire to secure by Letters Patent is:
l. A riveting machine of the character described having 35 in overlying relation to an anvil, means for- stopping the
rivet holder in both an upper and lower position whereby
a main frame, a rivet hopper supported upon the frame,
to dispose the rivet nest in an accurate position with re
an inclined chute that communicates with the hopper
spect to the discharge end of the chute and the work piece,
whereby to receive and convey rivets by gravity down
‘the movement of the driving device, the rivet ‘holder and
wardly to a discharge end of the chute, power driven
the ejector all being in a predetermined’ ‘timed sequence
means associated with the hopper for placing the rivets
and actuatable by a single foot pedal, the driving device
in a loading end of the chute, a rivet driving device sup
ported by the frame and that is shiftable in a vertical
and the rivet holder being movable ‘in a vertical plane in
path, power means for shifting the driving device, a rivet '
holder having an expandable rivet nest at its lower end,
the rivet holder being yieldably ‘and slidably connected
to the driving device, the driving device when in an upper
most’ position functioning to dispose the rivet nest'ad
45
a common guide housingpthe housing being supported
upon the forward end of arframe extension, the said crank
being hingedly connected to‘ the guide frame, at one end
and with its lower end having contacting engagement with
the ejector bar, a relatively heavy spring for biasing the
crank arm in a direction to shift the ejector bar in a direc
jacent to the discharge end of the chute, an ejector device
tion to eject a rivet into the rivet nest, a roller idevicercar
that is movable in a path to eject 'a lowermost rivet in
ried by the crank arm and that extends through an open~
the chute into the rivet nest, crank means for shifting the
'ing in the guide housing to lie in the path of movement
ejector in a direction to discharge a rivet, the crank being
of the driving device whereby a, downward movement
biased in one direction by a' spring, means carried by
of the drivingrdevice functions-to shift the crank arm to a
the crank that lies in the path of movement of the rivet
position to release the ejector bar, driving means for the
setting device whereby the crank is moved laterally upon
the downward movement of the setting device to release 55 driving device that includes a rocker arm that is journaled
intermediate its ends in the frame extension, a prime
the ejector, the downward movement of the driving de- ,
mover for driving the rocker arrn and with the prime
vice yieldably shifting the rivet holder and its rivet carry
mover drving a shaft, means carried by the shaft that has
ing nest to a point of engagement with a work piece that,
connection with one end of the rocker arm and foot con
is disposed in overlying relation to an anvil, means for
stopping the rivet holder in both an upper and lower posi 60 trolled means for manually actuating a clutch between the
prime mover and the shaft whereby the shaft will make
tion whereby to dispose the rivet nest in anjaccurate
one complete revolution. '
‘
'
_
I
position with respect to the discharge end of the chute
3. The structure according to claim' 1 wherein the key
and the work piece, the movement of the driving device,
means include a pair of plugs that are biased apart by a
the rivet holder and the ejector all being in a predeter
"
~
mined timedrsequence and,v actuatable by, a single foot 65 compression spring. '
4. In a riveting machine, a rivet driving device and a
pedal, the said riveting setting device including a body
rivet holder movable in a vertical plane through a guide
portion and a lower reduced extension that terminates in
a cylindrical punch that is in axial alignment with a rivet
that is. supportedin the nest of the rivet holder, the
body portion having at least one ?at face, the rivet holder
includingan elongated'body portion having at least one
?at face that has sliding engagement with the ?at face
of the rivet setting body portion, the rivet setting body
portion and the body portion of the rivet holder ‘being
housing, driving imeans coupled to the drving device for
vertically reciprocating it, the driving device being pro
vided with an elongated, groove, the rivet holder being
provided with a similar groove facing the groove in the
driving device, members complementary to and ?tting
into the both grooves and permitting relative sliding
movement between the driving device and the setting
slidable in a common housing, the ?at faces of the rivet 75 device, and a spring ?tted in the grooves and disposed
3,043,168
9
10
between the members vand tending to urge said members
apart.
_
.
2,310,008
2,652,942
_
References Clted 1n the ?le of 1111s patent
UNITED STATES PATENTS
1,596,366
1,850,671
Miller ______________ __ Aug. 17, 1926
Havener ____________ __ Mar. 22, 1932
Wol? ________________ _._ Feb. 2, 1943
Muchy ______________ __ Sept. 22, 1953
2,829,387
Carangelo _____________ __ Apr. 8, 1958
2,832,971
Tesch ________________ __ May 6, 1958
372,360
FOREIGN PATENTS
Great Britain __________ __ May 6, 1932
5
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