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Патент USA US2409707

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Oct. 22, 1946.
Y
J, |__ REPP'A
'
2,409,706
ATTACHMENT FOR DRILL PRESSES OR THE LIKE
Filed Sept. 22, 1944
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» Joseph! A. Esp/M.
0a. 22, 1946.
4 J. L. REPPA
'
2,409,706
ATTACHMENT FOR DRILL PRESSES OR THE LIKE‘
Filed Sept. 22, 1944
2 Sheets-Sheet 2
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Patented Oct. 22, 1946
2,409,706
UNITED STATES PATENT OFFICE
2,409,706
ArrscnMENr ronrldillitillpln BRESSES on THE '
' ‘ Joseph I]. Rcppa, Chicago, n1. "
Application September 22, 1944, Serial No. 555,211‘
6 Claims.
‘
(01. 77-63)
2
1
My invention is in connection with rotary
spindle machines for drilling, tapping, or per
forming other work on work pieces, and relates
particularly to an improved and simpli?ed at
tachment for such machines for aligning and
holding the work pieces during the rotary or
Figure 1 shows a conventional type of drill press
comprising the base ID with a cylindrical column
ll rising therefrom and supporting at its upper‘
end the drill press head assembly I2 in which
the tool supporting spindle I3 is axially shiftable
and is rotatable by the motor M, a work table
I5 being supported on the collar [6 vertically
axial movement of the tools.
An important object of my’ invention is to pro-,'
adjustable on the column I I in a well known
vide a simple attachment which may be readily
manner.
‘
applied to existing drill presses or the like and 10
My improved attachment comprises a down
which is adjustable for the size and shape of
turned arm ll extending from a clamp member
work pieces and for guiding the work pieces ac
l8 which,_ with the complementary clamp mem
curately into proper position for the performance
ber Hi,’ will adjustably clamp the attachment to
of work thereon and to hold them against rotary
the column I! above the work table l5. At its
or lateral" displacement while the work is being 15 outer end the arm I1 carries a head 20 which is
performed thereon and‘while the tools are being
withdrawn.
‘
1
Another object of the invention is to provide
a simple attachment which can be readily applied
to the column of a drill press or the like above a
work supporting table on the, column to hold the
work pieces in proper’position on the table for
operation thereon.
'
r
A further object is‘ to provide an attachment
shown in rectangular plate form and which
may be integral with the arm ll, this plate being
parallel with the work table I5. The plate has
the passageway 29 therein through which the
tool‘, such as, a drill X supported by the spindle
13; may pass for application to work pieces held
between'the plate and the table.
Adjustably mounted on the head 20 are a
plurality of aligning and holding elements such
in the form of an arm adjustably mounted on 25 as A and B, the elements A being shown as of
the column above the work supporting table and
terminating in a head parallel with the table and
provided with adjustable abutment members for
de?ning a recess for receiving the work pieces
and for holding them against lateral displace Si)
merit on the table during drilling or- other oper
ation thereon.
Another object is to provide an attachment
having a plurality of elements thereon adjust
able to de?ne a recess or space into which work
pieces may be inserted in proper position on the
work table for drilling or other operation and
to be rigidly held against displacement during
such operation.
L-shape and the elements B as to T-shape. Each
element comprises a rectangular supporting bar
‘22;, and these bars are received and are adjust
able in rectangular channels 23 shown as extend
ing transversely across the bottom of the head
23.
In alignment with these channels the head
has, the slots 2% through which screws 25 ‘are
extended for engagement in the threaded holes
26 in the bars, so that after adjustment of the bars
they may be rigidly held in set position. I have
shown the attachment set for receiving and.
holding work pieces W in the form of rectangu
lar plates which are to be drilled: The bars of the
aligning and holding members A terminate at
The above referred to and other features of
my invention are shown embodied in the struc
their outer ends in aligning ‘and holding ?ngers
ture on the drawings; which drawings:
from at right angles, while the aligning and hold?‘
Figure l is a side elevation of a drill press with
my attachment applied thereto; '
'
Figure 2 is an enlarged section on plane II-QII ‘
of Figure 1;
Figure 3 is an enlarged section on plane III-I'll’
of Figure 2;
'
Figure 4 is an underside view of the end‘of the
attachment;
Figure 5 is a section on plane V—:V of Figure 4';
Figure 6 is an enlarged perspective view of one
form of guide and abutment ?ngers; and
Figure 7‘ is a perspective of another form of
guide and abutment‘ elements.
21 which depend therefrom and extend there
ing elements B terminate at their outer ends in
?ngers 28 depending therefrom and extending
crosswise thereof.
The bars for the ?ngers 21
are shown as slidable in the outer channels 23
with the ?ngers extending toward each other for
engagement with one side of the work piece, while
the bars for the ?ngers 28 are in the intermediate
channels for engagement of these ?ngers with
the opposite side'of the work piece. The setting
of the holding and aligning elements is such that
when the attachment is positioned over the table
I 5‘, the work piece may be moved into position on’
the table between the ?ngers for transverse
' '
2,409,706
4
channels in its lower side and having slots
therethrough in alignment with said channels,
bars in said channels terminating at their ends
in ?ngers, screws extending through said slots
for engagement with said bars for setting of
said bars in adjusted position with their ?ngers
forming aigning abutments for side edges of a
work piece to hold the work piece against trans
alignment thereof for the drilling operation.
For aligning the work piece longitudinally for the
desired drilling operation thereon an abutment
element 29 is provided. This element is shown in
the form of a cylindrical bar which is received
at its inner end in the transverse bore 30 pro
vided in the arm ll adjacent the head 26. The
outer end of the bar 29 is reversely bent to pro
verse displacement during a drilling or other
vide a foot 3| against which the inner edge of
operation thereon, said arm having a transverse
the work piece will abut when it is in proper
bore therethrough adjacent said head, a cylindri
longitudinal alignment for the drilling opera
cal bar received at one end in said bore and
tion. The inner portion of the bar is parallel
having its other end bent to provide an abutment,
with the head 20 and the bar can be rotated and
shifted axially in the bore 30 to bring the foot end- __ said bar being rotatably and axially adjustable
in said bore to position said abutment for en
3| thereof into the proper abutment position for
gagement by the end of a work piece when in
the work piece, and then the bar is locked in the
serted between said ?ngers whereby said work
set position as by means of a set screw 32 thread
piece will then be in the desired position for
ing through the arm‘ l'l. Now, work pieces may
drilling or other operation and will be rigidly held
be inserted one after the other into position on
against displacement during such operation, and
the table l5 between the holding and abutment
means for holding said abutment bar in its set
elements for drilling thereof at the desired point,
position.
and during the drilling operation the work pieces
3. A device for centering a workpiece on a drill
will be held against displacement and also while
press table and holding it against displacement
the drill or other tool is being withdrawn. A'
multiplicity of work pieces may thus be quickly 25 during machining, comprising an arm swingable
0n the drill press post and secured thereto above
and accurately and safely drilled or otherwise
the table, said arm carrying a ?xed head at its
free end to be applied over a workpiece on the
table, a plurality of bars endwise slidable in said
operated on. The drills or other tools, after pass
ing through the work pieces, will enter passage
way 33 usually provided in the work table I5,
through which passageway the material re
30 head in parallelism, said bars having depending
moved from the work pieces will drop. All the
aligning, holding and abutment elements for
the work pieces are mounted on the attachment
I ‘l which may be readily swung out of service
position when its services are not required and -
which can be readily swung into service posi
tion to cooperate with the table 15 to receive
and hold the work.
Although I have shown an attachment adapted
for holding work pieces of rectangular shape, it
is evident that, by changing the shape of the
?ngers engageable with margins of a workpiece
on the table and adapted to rest on the table, the
horizontal lengths of said ?ngers being greater
than the widths of said bars, some of said bars
being reversed with respect to others to position
some of the ?ngers against one margin of the
workpiece and other ?ngers against an opposite
margin of the workpiece, another bar mounted
in said arm and endwise movable therein at right
angles to the direction of movement of said ?rst
' mentioned bars to engage a margin of the work
aligning and holding elements, the attachment
piece in substantially ninety degree relation with
will serve to hold work pieces of different shapes
or contours. Other changes and modi?cations
could also be made without departing from the
scope of my invention as de?ned in the appended
claims.
respect to the engagement of the ?ngers of said
?rst mentioned bars with the workpiece.
4. A work holding attachment for a drill press
I claim as my invention:
1. A holding attachment for drill presses or
the like comprising an arm having clamping
means at one end for adjustable clamping to
the drill press above the drill press work support
and terminating in a head, said head having
transverse channels in its lower side and having
slots therethrough in alignment with said chan
nels, bars in said channels terminating at their
ends in ?ngers, screws extending through said
slots for engagement with said bars for setting
of said bars in adjusted position with their ?ngers
forming aligning abutments for side edges of a 60
work piece to hold the work piece against trans
verse displacement during a drilling or other
operation thereon, said arm having a transverse
bore therethrough, and a bar received at one
end in said bore and at its other end providing
an abutment foot for engagement by one end of a
work piece when inserted between said ?ngers
whereby the work piece will then be held on the
work support against displacement during drill
or the like having a work supporting table, com
prising an arm having clamping means at one
end for adjustable clamping to the drill press
above the supporting table and having a head at
the oher end overlying the supporting table,
means carried by said head for engaging two
opposite sides of a workpiece on said table, said
means comprising a plurality of parallel endwise
movable bars mounted in said head and movable
transversely thereof, the outer ends of said bars
terminating in ?ngers downturned with respect
to the bar lengths and with the horizontal
lengths of said ?ngers greater than the horizontal
widths of said bars, said bars being so disposed
in said head that the ?nger of at least one of said
bars will engage one side margin of a workpiece
and the ?nger of at least one other bar will en
gage the opposite side margin of the workpiece,
and means for securing said bars to said head
with their ?ngers in engagement with the side
margins of the workpiece, said ?ngers resting on
said supporting table when said attachment is
set for use.
5. A work holding attachment for a drill press
ing or other operation thereon.
70 or the like having a Work supporting table, com
2. A holding attachment for drill presses or the
prising an arm having clamping means at one
like comprising an arm having clamping means
end for adjustable clamping to the drill press
at one end for adjustable clamping to the drill
above the supporting table and having a head at
the other end overlying the supporting table,
press above the drill press work support and ter
minating in a head, said head having transverse 75 means carried by said head for engaging the op
posite sides of a workpiece on said table in hold
head and movable transversely thereof, the outer
ing engagement, means for providing a stop to
ends of said bars terminating in ?ngers down
engage an end of the workpiece on the supporting
turned with respect to the bar lengths and with
table, said last means comprising a rod mounted
the horizontal lengths of said ?ngers greater
for axial and rotative movement in said arm and
than the horizontal widths of said bars, said
having its outer end reversely bent toprovide a
bars being so disposed in said head that the
foot to engage the adjacent end of the workpiece
?nger of at least one bar will engage one side
which is supported on said table and underneath
margin of the workpiece and the ?nger of at
said head, rotative movement of said rod in said
least one other bar will engage the opposite side
arm permitting vertical adjustment of its foot 10 margin of the workpiece, means for securing said
with respect to the height of the workpiece, and
bars to said head with their ?ngers in tight en
means for securing said rod in adjusted position
gagement with the side margin of the workpiece,
in said arm.
means for providing a stop to engage an end of
the workpiece on said table, said last means com
prising a rod mounted for axial and rotative
6. A work holding attachment for a drill press
or the like having a work supporting table, com
prising an arm having clamping means at one
end for adjustable clamping to the drill press
above the supporting table and having a head at
movement in said arm and having its outer end
its other end overlying the supporting table,
on said table underneath said head, and means
means for engaging two opposite sides of a work
for securing said rod in adjusted position in said
piece on said table comprising a plurality of
parallel endwise movable bars mounted in said
arm.
reversely bent to provide a foot to‘ engage the
adjacent end of the workpiece which is supported
JOSEPH L. REPPA.
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