US2584335A

US2584335A - Parallel thrust drive

Info

Publication number: US2584335A
Application number: US67445A
Authority: US
Inventors: Hal W Dahly
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-12-27
Filing date: 1948-12-27
Publication date: 1952-02-05
Anticipated expiration: 1969-02-05

Description

Feb. 5 1952 H. w. DAHLY PARALLEL THRUST DRIVE Filed Dec. 2v. 1948 INVENTOR. (m2 paid) #1; flfzaragy Patented Feb. 5, 19 52 UNITED STATES s rssr OFFICE Hal W. Dahly, Chicago, Ill. Application December 27, 1948,.Serial No. 67,445

9 Claims (CI. 74-40) This inventionrelates to means for reciprocating a plate in a frame and further to a parallel thrust drive and more particularly to a parallel thrust drive for a punch press and specifically to a parallel thrust drive for a paper perforating press which is used to punch a row of hinge holes along respective edges of loose leaf type pages for the engagement of conventional plastic coil page connectors.

In punching operations of this class, it is necessary to perforate pages of considerable length requiring punch shanks and dies of corresponding width and shanks being provided with a row of punches as long as sheets of any length require, it being of course understood that such shank and punches are usedin connection with dies having respective holes for the several punches. One of themajor problems in actuating a punch shank with a set of punches so widely distributed i to provide in conjunction with a mounting and driving slide for the punchshank,

a mechanism which will restrict such shank to a parallel position in respect to the die and likewise the paper being punched, and which will rigidly maintain this parallel relation through the working strokes of the shank.

It is a general object of the invention to provide spaced shank driving mechanism for actuating each side of such shank and to provide a means of operating same in unison from a single power receiving shaft.

It is a further object to provide mechanisms of this class operated from a single crank, driven by such shaft through oppositely extending connecting rods, which engage similarly arranged shank driving bell cranks, and to provide a means associating said bell cranks with such shank for converting the radial movement of such bell cranks to a normally vertical shank driving action.

It is also an object to provide a mechanism of this class which is readily assembled and disassembled for inspection, or for any other rea son, and to provide a simple construction which may be economically'manufactured and which may be operated for a minimum cost in upkeep. 1

The above and other objects are carried out by the structure illustrated in the accompanying drawing, in which Figure 1 is a plan view of the upper structure partly in section taken in the proximity of line I-IofFigureS,

Figure 2 is a fragmentary sectional plan view taken in the proximity'of line 2+ 2of Figure-"3,

Iii

Figure 3 is a fragmentary sectional view taken in the proximity of line 33 of Figure 2, and

Figure 4 is a fragmentary sectional view taken in the proximity of line 44 of Figure 3.

Similar characters of reference designate similar parts throughout the drawing. Referring to Figure 1, the numeral I designates the frame of the machine which journals the driving shaft 2 upon which the drive pulley 3 is mounted at one end, and further associated with said shaft in driving same is a conventional press clutch 4, as will be understood by those familiar with the art. The other end of said shaft extends to the interior of the drive housing '5, and is provided with a crank pin 6, which extends into said'housing. Said housing is somewhat elongated, being horizontally disposed and transverse to said shaft.

The housing 5 has forwardly terminating side walls I, which are cut away to nest corresponding sides of the driving head or plate 8, said head being thus slidably retained by the gibs. 9 and screws Ill. The extensiveness of said head is partly indicated by dot-and-dash lines I I in Figure 3, it being essential to show in solid lines working parts which would be otherwise concealed in that figure. Said head is constructed at its lower edge with a punch shank engaging formation I2, which extends throughout its width. The punch shank I3 is provided with a corresponding'formation which interlocks with same, said shank being slidably displaced in the guide I l, which is mounted on the base I5 of the frame I. Said shank is provided with downwardly extending punches I 6 spaced at suitable intervals throughout its width indicated by doubledot-and-dash lines I! of Figure 3. The die I8 is also supported on the base I5 under said punches with its die holes I9 in working relation therewith, said base being provided with an opening 20 through which the punchings escape as understood by those familiar with the art.

It will be observed that in addition to performing its work in driving the punch shank I3, the drive head 8 serves as a closure for the housing 5, being spaced from the back wall thereof a suitable distance forthe lateral confinement of the block type bell cranks 2| and 22, located in respective ends of said housing, said bell cranks being conveniently fulcrumedby the pivot pins 23 which are mounted in the lower region of said housing, through'the rear wall24, and retained by thewashers 25 and SCIBWSJ'YZG which hold the shoulders 21 of said pivot pins drawn ri idly against the inner surface of said side wall.

Spaced co-directionally to the side of and parallel to respective fulcrum pins 23, the pins 28 are disposed through holes in said bell cranks, said pins having enlarged portions engaging locks 2 which are free to move rotatably thereon, said blocks being slidably disposed in the horizontal grooves 36 of the drive head 8, and said enlarged portions being confined between the bottom of said grooves and respective bell cranks for retaining said pins longitudinally.

Referring more particularly to Figure l and Figure 3, the inner ends of the oppositely extending connecting rods 3| and 32 engage the crank pin 5 of the shaft 2. The straight rod '32 is centrally spaced between the drive head 8 and rear housing wall 24 and is forwardly of the rod 3|, its outward end being confined in the upwardly disposed slot 33 of the bell crank 22, where it is engaged by the upper bell crank pin 34' and the rod 3| is offset at 35 to bring its outward end into the slot 35 of bell crank 2|, where it is engaged by the pin 3?.

From the foregoing it will be understood that when the connecting rods 3| and 32 are actuated by the crank pin 6, the bell cranks 2] and 22 are swun co-direc'tionally moving the "drive head 8, by the pins 28 and blocks 29 by their engagement with the grooves as, that the punches 1B are thus actuated through the shank [3, as previously described, and that said head is thus maintained parallel to the base l5 when thus moved.

The connecting rods 3| and 32 are retained on the pins by washer 38 and screw as, omitted in Figure 3. The means for creating rocking motioncomprise's connecting rods 3i and 32, bell cranks Hand '22, pins 3 2 and 3?, pivot pins 23 washers 25, and screws 2s. The means for converting the rocking motion into reciprocatory motion comprises the pins 28 and blocks 29 engaging in the grooves 38 of the punch driving head 8.

The die-shoe M has sloping fore and aft oppositely beveled edges ll, the forward edge embracing the corresponding edge of the bar 43 against which it is held by the gib clamps '44, which are fulcrumed on the pivot shaft 45. Said shaft is helddirectly on to the base 15 by screws 43, said gib clamps being cut away to allow for this, the remote end of each gib being provided with a screw 47, downwardly against said base by which arrangement it will be seen that tightening of said screws will nose the other end oi the gibs against the inclined surface of the dieshoe 46, by which it is thus held in place against the bar 43.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. 1 therefore do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

The invention claimed is: V

1. A punch press embodying a frame with an elongated vertical wall, a pair of spaced and similarly arranged bell cranks journaled to said wall, a drive shaft journaled in said frame and having a crank pin which protrudes through said wall, connecting rods linking said crank pin with said bell cranks, a punch driving head slidably gibbed to said frame, and means associating said bell cranks with said head in operating relation thereto, whereby said head is moved by force from 4 said crank pin transmitted through said connecting rods to said bell cranks.

2. A punch press embodying a frame, a pair of spaced and similarly arranged bell cranks journaled to said frame, said bell cranks having aligned grooves, a drive shaft journaled in said frame and having a crank pin, connecting rods linking said crank pin with said bell cranks, one H end of each being disposed in one of said bell crank grooves, a punch driving head slidably gibbed to said frame, said head having horizontal grooves and means associating said bell cranks with said grooves in head driving manner.

3t In a punch press for punching a row of holes along the margins of paper sheets, a frame including a vertical Wall, a punch driving head parallel to and spaced from said wall and slidably mounted in said frame, a shaft journalled in said wall substantially midway the extremities thereof, a crank pin drivably carried by said shaft and disposed in the spacebetwe'en said head and wall, and means in said space for operatively conmeetin said crank pin to'said driving head at spaced'points" on the latter,

4. The combination with a frame, a base positioned normally of said frame and secured thereto, a plate having a pair of grooves therein positioned normally of said base and mounted for re ciprocal movement in said frame, of a means for reciprocating said plate and maintaining the end of said plate adjacent said base in parallel relation with said base during the reciprocal movement of said plate, said means comprising a drive shaft, a first means for creating rocking motion pivotally connected to said frame and means for creating rocking motion and slidably disposed in the other of said grooves.

5, The combination with a frame, a base positioned normally or said frame and secured thereto, a plate positioned normally of said base and mounted for reciprocal movement in said frame, of a meansfor reciprocating said plate and maintaining the end of said plate adjacent said base in ,parallialrlation with said base during the reciprocalmovement of said plate, said means comprisin a 'pair of bell cranks arranged in spaced relation with respect to each other and one of said bell cranks being pivotally connected to said frame and the other of said bell cranks being pivotally connected to said frame, a drive shaft positioned between said bell cranks and rotatably supported in said frame, a first connecting rod having one end mounted on said drive shaft and having its other end pivotally connected to said one of said bell cranks, a secand connecting rod having one end mounted on said drive shaft and having its other end pivotally connected to said other of said bell cranks, a first means operatively connecting said one of said bell cranks to said plate, andasecondmeans operatively connecting said other of said bell cranks to said plate.

6. The combination with a frame, a base positioned normally. of said frame and secured thereto, a plate having a pair of grooves position'ed normally of said, base and mounted for reciprocal movement in said frame, of a means for reciprocating said plate and maintaining the end of said plate adjacent said base in parallel relation with said base during the reciprocal movement of said plate, said means comprising a pair of bell cranks arranged in spaced relation with respect to each other and one of said bell cranks being pivotally connected to said frame and the other of said bell cranks being pivotally connected to said frame, a drive shaft positioned adjacent said bell cranks and rotatably supported in said frame, a pin ec-centrically positioned on the adjacent end of said drive shaft and secured thereto, said one of said bell cranks being operatively connected to said pin and said other of said bell cranks being operatively connected to said pin, a first block pivotally connected to said one of said bell cranks and slidably disposed in one of said grooves, and a second block pivotally connected to said other of said bell cranks and slidably disposed in the other of said grooves.

7. Means for reciprocally moving a plate in a frame, said means comprising a pair of bell cranks arranged in spaced relation with respect to each other and pivotally connected to said frame, a drive shaft positioned adjacent said bell cranks and rotatably supported in said frame and operatively connected to each of said bell cranks, a first means operatively connecting one of said bell cranks to said plate, and a second means operatively connecting the other of said bell cranks to said plate.

8. Means for reciprocally moving a plate in a frame, said means comprising a pair of hell cranks arranged in spaced relation with respect to each other and one of said bell cranks being pivotally connected to said frame and the other of said bell cranks being pivotally connected to said frame, a drive shaft positioned adjacent said bell cranks and rotatably supported in said frame, a pin eccentrically positioned on the adjacent end of said drive shaft and secured thereto, said one of said bell cranks being operatively connected to said pin and said otherof said bell cranks being operativelylc'onnected to said pin, a first means operatively connecting said one of said bell cranks to said plate, and a second means operatively connecting said other of said bell cranks to said plate.

9. Means for reciprocally moving a plate having a pair of grooves therein in a frame, said means comprising a drive shaft, a first means for creating rocking motion pivotally connected to said frame and operatively connected to said drive shaft, a second means for creating rocking motion arranged in spaced relation with respect to said first means for creating rocking motion and pivotally connected to said frame and operatively connected to said shaft, a first block pivotally connected to said first means for creating rocking motion and slidably disposed in one of said grooves, and a second block pivotally connected to said second means for creating rocking motion and slidably disposed in the other of said grooves.

HAL W. DAI-ILY.

REFERENCES CITED Y The following references are of record in the file of this patent:

UNITED STATES PATENTS