US2142560A - Paper drilling machine - Google Patents

Description

Jan. 3, 1939. w c. EICKMAN PAPER DRILLING MACHINE Filed Oct. 2, 1957 3 Sheets-Sheet l INVENTOR.

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Jan. 3, 1939. wA c, EICKMAN 2,142,560

PAPER DRLLING MACHINE Filed Oct. 2, 1937 3 Sheets-Sheet 2 INVENTOR. Mq/Jf 7m/MAN WMM dnf ATTORNEY -HHHHHHHHUH- m VIM Jan. 3, 1939. w, c, EicKMAN PAPER DRILLING MACHINE 3 Sheets-Sheei Filed Oct. 2, 1937 43 1:; VENTOR. Mura? C. 20w/vn Patented. Jan. 3, 19.39

UNITED STATE-s1 PATENT ori-TCE PAPER DJILIN G MACHINE Walter C. Elo

hmm, Harris-Seybold-Potier Company,

Dayton, ohio, assign: u

Cleveland,

Ohio, a corporation of Delaware l Application October 2, 1937, Serial No. 166,974

9 Claims.

This invention relates to improvements in paper drilling machines, that is to say machines provided with hollow drills for making perforations in stacks of sheets such as sheets for loose- A further object is the provision of a conveyor `-.'for-this purpose utilizing an endless belt and4 comprising a guard for the belt adapted to preventithe spilling -ofchips onto the work table, an'diinounting brackets adapted to permit the rapid and easyl removal or replacement of the belt` orfguard, and to facilitate the adjustment of the belt. g;

Other objects-'and features of novelty will appear as I proceed with the description of that embodiment o! the invention which, for the purposes of the .present application, I 'have illustrated invthe accompanying drawings.' in which Fig. l is a plan view, partly in horizontal section, of a portion of a multiple spindle paper drilling machine embodying my invention.

Fig. 2 is a front elevation of the same, with certain parts broken away or in vertical section to more clearly illustrate the invention.

Fig. 3 is a vertical sectional view taken substantially on the line 3-3 of Fig. 2.

Fig. 4 is a perspective view of the endless belt and its supporting brackets.

Fig. 5 is a fragmental perspective view from the rear of the machine illustrating the means for delivering chips from the hollow drill onto the belt guard and belt, and A Fig. 6 is a horizontal sectional view taken substantially on the line 6-6 of Fig. 3,' and showing the parts on a larger scale.

Similar reference characters refer to like parts throughout the views.

The machine illustrated in the drawings comprises hollow side columns Il and II constituting the principal frame elements of the machine,-

`and a work table I2. A back gauge I3 is mounted on the table and a cutting stick I4 rests in the usual groove in the table provided for that purpose. 'I'he columns Il and II are connected at (c1. rel-ss),

their upper ends by a rail .I5 secured to the col'- umns by screws I6, I1, I8 and I9, or their equivalent. The rail I5 is preferably hollow, as illustrated in Fig. 3. and is provided with upper and lower dovetaii ways 20 and 2|. with a semi-cylindrical cavity 22 interposed between them.

Near the extremities of the rail I5 journal brackets 23 and 24 are removably attached thereto by means of screws 25 or the like, and in these brackets there is Journaled a shaft 26 which'at one end extends beyond the journal into the interior of hollow column III, where it carries a small sprocket wheel 21 and a large sprocket wheel 28. The latter sprocket wheel is driven by a chain 29 from the machine motor,

not shown.

A plurality of drill heads 30, of which'there may be any convenient number, are adjustably mounted upon the ways 2li and 2| of the ,rail I5. EachY of these heads carries a worm wheel 3| which is slidably keyed to the shaft 26 and is held against movement relatively to the head by plates 32 attached to the head on either side thereof. these plates having openings therethrough to accommodate the shaft 26. The worm wheel 3i in each case meshes with a worm 33 that is mounted on a vertical spindle 34, s uitably journaled in the head, and carrying at its lower end a hollow drill 35. The drill is hollow throughout its'length, and at its upper end communicates with a hollow portion 36 of the spindle. The construction of the drill and the method of mounting it may be somewhat as shown in Patent 1,493,457, issued May 6, 1924 to J. T. Wright. A lateral opening 36' in the spindle provides an'exit from the spindle for paper chips that are forced by the action of the drill upwardly therethrough. When these cuttings emerge from the openings 36 into the cylindrical space 31 within the head surrounding this portion of the spindle, they are forced out of that space by a blade or wing flvleither` by direct contact or by the air blast thus created. Wing 3l is preferably formed integral with the spindle.

It will be understood that any number of heads 30 may be used, depending upon the requirelments of the particular job in hand, and drill heads may be added or subtracted by removing the journals for shaft 26, when the drill heads may be slid onto or oi! of one end of the shaft. Suitable clamping means are provided to cooperate with the rail I5 for holding the various heads in adjusted position.

The cylindrical opening 31 within which rotates that part of the spindle which carries the wing 3l, is intersected by a window 3l which extends rearwardly in front of a canopy 4l which has a single side wall 4I. The spindle rotates clockwise, as indicated in Fig. 6, and cuttings or chips which are impelled by the wing 3l outward through window il in some cases strike against the wall 4I. The latter wall overhangs the forfward'lip'ot a sheet metal guard 42. The free edge of the forward lip of guard 42 substantially engages the various heads Il but has no connection therewith,` so that no manipulation of the guard is necessary when the heads are adiusted along rails Il.

An endless belt 4I runs transversely of the machine under the rail i! and serves as a conveyor for carrying away the chips which are delivered through the windows Il of the various drill heads. This belt is mounted upon two brackets 44 and 4l. Bracket 44 has an upwardly extending projection 4I provided with a hole 41 through which screw I1, previously mentioned, is caused to ex- .the rear portion of the bracketf tend. and by means 'f which the bracket is securely held in position. On its under side this bracket is recessed to receive a roller 4l which has a reduced iront end 4I journaled in lthe bracket. This roller also has a smooth portion rotatably mounted in an elongated bearing in Behind the latter bearing a bevel pinion I is pinned tothe roller. This pinion meshes with a bevel pinion 52 on a short shaft 53 which is'journaled in an angular extension 54 of the bracket, the shaft IJ also carrying a relatively large sprocket wheel 5i over which runs a chain I6 that also runs over sprocket 2l on shaft 26. In the operation of the machine, shaft 26 communicates rotary motion at slower speed to shaft 53 through the intermediacy of sprockets 21 and 55 and chain Si, which in turn drives roller 4l through the intermediacy of bevels 52 and Il;

Bracket 45 carries an idler shaft or roller 51 which extends through a major part of the bracket and has its principal bearing therein. The shaft is provided on its rear extremity with a headed pin 58 which takes into a slot in a sheet metal plate 59 pivoted to the bracket by a screw 60. In this manner the roller is held against accidental longitudinal movement, but may be quickly and easily withdrawn when necessary. The forward portion of the roller extends .through a recess 6l in the bracket, and its forward extremity bears against a short abutment 62 curved to receive the roller between the two runs of the belt. Bracket 45 is supported by two studs 63 that are mounted in holes 64 of the bracket and extend through holes 65 vin the column l I of the machine frame. Nuts 66 on the studs 63 bear against the outer surface of the column and may be adjusted to vary the position of the bracket and hence the tension upon the belt. It will be noted that the belt may be drawn oil the roller 51 in a forward direction by merely loosening the tension of the belt, that is by unscrewing the nuts 66. 'Ihe belt may then be removed entirely by withdrawing roller 48 rearwardly. Hence belt replacement is a very simple matter.

The upper run of belt 43 travels toward the right, Fig. 1, in a shallow trough or guide groove in the central part of guard 42. On either side of this central part the guard extends upwardly at a slight angle.' At the rear this guard has a short vertical wall and then returns horizontally and is provided with an upwardly extending flange 61 which is attached to the rail I l by anarco screws 64. The guard may thus be readily rc moved after the tension on the belt has been re lieved by the means heretofore described.

Cuttings or chips carried on the conveyor are dumped through the recess Il in bracket 45 into the hollow column Il, and are collected in a box II which is removably supported by some convenient means. as for instance by screws 16, the heads oi' which are spaced slightly from the wall of the column ii. The box is hung on the screws, preferably by means o! keyhole slots. Accordingly when the box has been moved upwardly a short distance it may be withdrawn horizontally, emptied, and replaced.

0pfati0n.-When holes are to be drilled in a stack of paper the drill heads and the back and side gauges (the latter not shown) are set in the proper positions. a stack of paper is positioned on the table against the gauges, and with the machine motor running and the drills 35 turning the operator moves controls which cause the table I2 of the machine to rise gradually, thereby forcing the rotating drills through the paper and iinally into the cutting stick i 4. Thereafter the table is lowered, disengaging the drills from the work, when the work may be removed and new work put in position. As the drills rotate and pass through the work small disks, chips or cuttings of paper are removed from 'the stack of sheets and caused to travel upwardly through the hollow drills and finally through the passage 36 and opening 36' into the cylindrical cavity 31 of the drill head. Here the chips are struck by the rotating wing 38 and driven out by that wing and by centrifugal force, as well as by the current of air set up by the rotation of the wing. They emerge from the window 39. Some of them travel rearwardly and strike the rear portions of guard 42. settling for the moment on the inclined surface of the guard to the rear of the belt. Other -chips travel rearwardly far enough only to settle upon the belt itself. Still others merely drop onto the inclined surface of the lip at the forward side of the guard. Many of the chips strike the wall 4I on the head and then drop onto the guard or are deflected onto the belt. Because of the -rotation of the drill in a clockwise direction,

`veyor ordinarily requires no attention other than the occasional emptying of the box S9. The adjustment of the drill heads transversely of the machine is made entirely independently of the conveyor apparatus and does not affect it in any way.

Variations from the described structure may be employed. Accordingly I desire it to be understood that the scope of the invention is to be regarded as dened exclusively by the appended claims rather than by the foregoing description or the accompanying illustration.

lHaving thus described my invention, I claim:

1. In a machine of the class described, a drill head, an endless belt conveyor arranged trans versely of the machine behind said drill head, means for forcing cuttings rearwardly from the tings, a guard extending between the runs of said belt and for a distance on either side thereof, a roller for one end of said belt, a bracket carrying said roller, and means associated with said bracket for moving the roller to relieve the tension of said belt, whereby the removal of said guard is facilitated.

3. In a machine of the class described, a p1u rality of hollow drills, means for delivering cuttings from said drills in a rearward direction, a transverse trough arranged to catch said cut tings, a forwardly and upwardly extending lip on the trough underlying the point of delivery of said cuttings, and means moving lengthwise of said trough to carry the cuttings longitudinally of the trough.

4. In a machine of the class described, a plurality of hollow drills, means for delivering cuttings from said drills in a rearward direction, a transversely extending trough arranged to catch said cuttings, said trough on its sidev remote from the drills having a rearwardly extending covered lip, and means moving along said trough to carry the cuttingsy longitudinally thereof.

5. In a machine of the class described, a transverse rail, a plurality of drill heads adjustably mounted on said rail, means for delivering cuttings rearwardly from said drill heads, and a trough beneath said rail supported at its rear edge and closed at its rear edge, said trough having a forwardly extending lip arranged in close proldmity to the lower ends of the drill heads, whereby the delivery of cuttings to the trough is not affected by the adjustment of the drill heads along said rail.

6. In a machine of the class described, a rail,

3 a plurality of hollow drills carried thereby, means for delivering cuttings from said drills in a rearward direction, a trough to catch said cuttings arranged beneath the rail, said trough on its side remote from the drills having a rearwardly extending covered lip, and said lip having a forwardly extending return portion attached to said rail, whereby the return portion and rail togather form a cover for said trough.

7. In a machine of the class described, a transverse rail, a plurality of drill heads adjustably mounted on said rail, said drill heads on their rearward sides having downwardly extending delivery openings for cuttings, and a trough beneath said rail attached to the rear edge of the rail, said trough having a forwardly extending lip underlying said delivery openings, whereby the cuttings are discharged directly onto the open upper surface of said lip.

8. In adrill press for perforating sheets or the like, a drill head, a hollow drill therefor, a spindle having a laterally opening passage communicating with the hollow interior of the drill, a wing on said spindle, said head having a cavity in which said wing rotates, said cavity being open towards the rear, an upright lateral wall carried by the head to prevent cuttings impelled by the wing from moving laterally of the head, and a transverse conveyor comprising a trough having a lip extending forwardly :beneath said lateral4

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