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Патент USA US2122648

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‘July 5, 1938.
Filed Aug. 22, 1955
2 Sheets-Sheet l
57/4/12 6')’ N JOHNSON
July 5; 1938.
Filed Aug. 22, 1935
2 Sheets-Sheet 2
(QM/r7. (74/414
Patented July 5, 1938
Stanley N. Johnson, Lansing, Mich, assignor to
Motor Wheel Corporation, Lansing, Mich., a
corporation of Michigan
Application August 22, 1935, Serial No. 37,290
1 Claim. (01. 113-50)
This invention relates to work removing de
vices and particularly to a work removing device
for association with intermittently operating
work forming machines such as punch presses
5 or the like.
It is a’ general object of the invention to pro
vide an intermittently operable work removing
conveyor to cooperate with an intermittently
operating forming machine, and it is a particu
lar object to provide such a work removing con
veyor which is automatically operable in timed,
coordinated relation to the movements of the
forming machine, and which is constructed in
such a manner as to be self-unloading.
It is a further object of the invention to pro
vide timing mechanism to effect the automatic,
intermittent operation _of the work removing
In the drawings:
Figure 1 is a side elevational view of a punch
press of conventional design having the device
of the present invention secured thereto in oper
ative relation;
Figure 2 is a side elevational view of the punch
25 press with the work removing table secured
Figure 3 is a fragmentary elevational view,
partially in section, showing the work remov—
ing table in work receiving position;
punch |'| positioned on the lower side thereof
which may cooperate with a die |8 to form the
work when the ram I6 is in its lowermost posi
tion. As the ram and punch move upwardly the
work is carried on the punch and is removed
therefrom by stripper plates |9 mounted on the
frame I0.
The work removing device of the present in
vention comprises a base 2| suitably secured to
the frame |,|l adjacent the path of the ram |6 10
and having spaced vertically extending support
ing frames 22 secured thereto which in turn are
provided adjacent their upper edges with paral
lel channels or guides 23 to receive the opposite
edges of a conveyor table 24 reciprocably mount 15
ed to move fore and aft therein. The table may
be provided with vertically extending brackets 25
at its forward end for preventing the work, indi
cated at 20, from sliding off when the table is
moved to the left.
A cylinder 26 is secured as at 21 to an upstand
ing bracket 28 which in turn is suitably secured
at 29 to the base 2|. For alternately recipro
cating the table 24, a piston 3| is mounted with
in the cylinder 26 and is provided with a piston
rod 32 exending outwardly of the cylinder, and
which in turn is adjustably and pivotally con
Figure 4 is a fragmentary elevational view
showing a portion of the timing mechanism in
nected as at 33 to an arm 34 intermediate the
ends thereof. The arm 34 is pivoted at its upper
end at 36 to a boss 31 formed on the under side
of the table 24, and at its lower end is provided
one position; ,
with an enlarged longitudinally extending slot
Figure 5 is a fragmentary View showing the
punch in its upward travel in relation to the
35 work removing table, as shown in Figure 3;
Figure 6 is a view of the work removing table
similar to that of Figure 3 but showing the table
in work delivering position;
Figure 7 is a fragmentary elevational view of
the timing mechanism in another position from
that shown in Figure 4; and
Figure 8 is a fragmentary view showing the
punch in its downward travel in relative posi
tion to the work removing table as shown in
45 Figure 6.
Referring now to the drawings, reference nu
meral ID indicates the upright, spaced frame
members of a punch press having a crank shaft
38 pivotally mounted on. a pin 4| carried by an
upstanding boss 42 on the base 2 I, thus providing
a lost motion connection for the arm.
This lat
ter construction prevents binding of the table
in its guideways as it is moved fore and aft, and
provides a downward pull as the table 24 is started
in motion.
The power medium for actuating the piston
3| is preferably compressed air but may con
veniently be oil under pressure, or any other well
known means. Suitable ?uid inlet connections
(not shown) are made to a valve casing 44
mounted upon a horizontally extending bracket
45, and a ?uid supply conduit 46 leads from the
casing to the interior of the piston cylinder 26
adjacent one end thereof, and another ?uid sup
|| journaled in the ends thereof and which in ply conduit 41 also leads from the casing 44 to
turn is provided with a ?y wheel |2 at either ’ the opposite end of .the piston cylinder 26 and
end thereof to receive power from a belt or other communicates with the interior thereof.
suitable source. A connecting rod I3 is pivotally
For alternately admitting the ?uid under pres
mounted upon a crank pin M to be intermittently sure to the conduits 46 and 41, a suitable dual
reciprocated by the rotation of the crank shaft valve mechanism is provided and comprises, in
55 and is suitably secured to a ram l6 having a the present instance, a valve casing 44 and a
guide plate 48 mounted at its center as at 49,
and ‘provided with vertically extending valve
operating rods 50 and 5| on either end thereof,
' which extend through the guide plate 48 and
operate the valves in the valve casing 44.
For alternately actuating the dual valve mech
anism to in turn cause the table 24 to be re
mentum of the work 20 carries it o? the table
on to a suitable conveyor or into a container,
not shown.
As soon as the table 24 moves to the left the
ram Hi again moves downwardly to engage the Cl
die [8 and the cycle of operation is repeated.
The work remover is equipped with a safety
device to prevent the return of work 29 with
table 24 if for any reason the work is not dis
charged from the table on its outward movement.
V10 actuating mechanism is provided which com This
device consists of a safety arm 'i5 fastened
. prises a pair of cams 52 and 53 adjustably secured . to. a shaft 14. Shaft 14 is rotatably mounted in
to an extended portion Ila‘ of the crank shaft supports 73 which are attached to frame meme
II and relatively positioned thereon so that‘ one bers 22. A stop arm 16 is secured to one end
cam surface follows the other to provide the of shaft ‘[4. 'It is adapted to contact a stop pin
necessary timing. A pair of push 'rods 54 and 55 ‘ 11 attached to support 13.
When the table 24 moves work 29 out from
are reciprocatably mounted in a bearing bracket
56 carried by a vertically extending member 56a under the press on the outward movement of the
which in turn is mounted on the bracket 45. table, the work strikes arm 15 lifting it sufficiently
Each of the push rods 54 and 55 is provided with to permit the work to pass under the arm. After
a cam follower 51, which in the present instance the work has passed underarm 15 the arm drops
is a roller journaled in the bifurcated ends 58 of back to the position shown in Figure 2 and thus
the push rods. Adjustable tappets 59 and 61 are prevents work 29 from being carried back under
mounted in the ends of push'rods 54 and 55 and the press in case it is not properly discharged
from table 24. Stop arm 16 and pin 11 serve to
' reciprocate with the rods. Bracket 62 is secured
to the vertical member 55a. Compression springs limit the rotary movement of arm 15, thus pre
63 and 64 are positioned betweenspaced spring venting the possibility of it beinglifted so far
seats 66, 67, 6,8 and 69,, the upper spring seats 68 that it will not fall back in place after the work
has passed beneath it.
a ,
and 59 being adapted to be engaged by the en
It will thus be seen that a completely auto
larged portions ‘II and ‘i2 of the push rods 54
and 55. The lower spring seats 66 and 6.1 engage matic device is provided for removing work from
forming machinery. The device automatically
the bracket 62.
In operation, the ram [5 carrying the punch receives the work, conveys it from 'themachine,
automatically unloads itself and'return's to re
i1 is reciprocated by the crank shaft It to inter
mittently engage the die i 8 to form vthe work. ceiving position. A precision timing andactuat
As the ram I B and punch I‘! are moved upwardly, ring mechanism is provided together withrmeans
the work 20 is removed from the punch I‘! by for closely adjusting the entire ‘mechanism to
ciprocated fore and aft in coordinated, timed re
lation to the intermittent movements of the
the stripper plates [9 and drops therefrom.
Just prior to the removal of the work from the
punch, the cam 52 on, the crank shaft engages the
cam follower 5‘! of the push rod 54 to force the
tappet 59 into engagement with the valve stem
push rod 50, thus opening the valve. Compressed
air is thus admitted to the supply conduit746 from
the valve casing 44, and enters the cylinder 26
‘ at one end of the piston 3|, forcing the piston to
the right and in turn moving the lever arm 34
to the right carrying the table 24 within its guides
ways 23 also to the right, into the position shown
in Figures 2 and 3 to receive the work 20 as it is
stripped from the punch l1.
As soon as the work drops on the table, th
cam surface 53 engages the follower 51 on the
operate the work removing table quickly and in
tel-mittently in coordinated, timed relation to the
movements of the work forming member of the
Various modi?cations in the construction and '
design of the conveyor device as shown and de
scribed and numerous adaptations of the device
may be made to the various types of work form 45.5
ing machines without departing from the spirit ‘ ~
or scope of the invention which is to be limited
onlyby the appended claim.
I claim:
In a work removing device, a base,,a supPQrt v5.0
ing member secured to said base, a conveyor
table reciprocably carried by said supporting
member, an arm pivotally secured at one end to
‘said table and having at its other end a lost mo:
tion pivotal connection to said base, a piston,
a connecting rod connected to said piston and '7
secured to said arm intermediate its ends,.and
means for alternately applying fluid pressure to
push rod 55 to engage tappet 6| with the other
Valve stem push rod 5!, thus opening the valve
to provide ?uid communication from the valve
casing 44 to the supply conduit 41, which in turn
supplies compressed air to the opposite end of
the piston 3i, forcing it to the left to pull the ‘each. end of said pistonto alternately reciprocate
to lever 34 and table 24 quickly to the left. The said table in opposite directions.‘
piston 3!, and therefore the table 24,, stop quickly '
in the position shown in Figure 6, and the mo
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