US1425041A - Perforating machine - Google Patents

Description

D. NOBLE.

PERFORATING MACHINE.

APPLICATION FILED OCT. 29. 1919.

11,425, 0% 1 Pate ted Aug. 8, 1922 'mlilln... 3

' MHHH L INVENTOR DUNALD f/QW F 1 w a A TORNEY DONALD liTOBLE, OF BRIDG-EPORT, CONNECTICUT, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, A CORPORATION 01? NEW JERSEY.

PEBFORATING MACHINE.

iaeaoai.

Specification of Letters Patent.

Patented Aug. 1922.

Application .filed October 29, 1919. Serial No. 334,153.

'2 0 all whom it may concern:

specification, reference being had therein to the accompanying drawings.

This invention relates to various improvements and modifications more particularly designed for use in connection with the perforating machine disclosedin the Noble application Ser. No. 232,744, filed May 6, 1918, though it will be evident from further description that many or all may find application in other machines where similar functions are desired to be effected.

It provides an improved punch feed which dispenses with the use of a feed lever having a slotted guideway in one arm, along .which the punch actuating link may be adjusted, substituting therefor a light lever having a non-variable connection to the punch actuating link, the throw of the lever being adjusted by varying the throw of the actuating crank mechanism. With the use of unsymmetrical gang punches the punch feed must be very accurately adjusted, in order that the line of punching may be symmetrical and give a pleasing effect. This is accomplished in the present invention by a simple light micrometer mechanism having multiplying indicating means by which the adjusted position of the feed may be accurately determined. This adjustment is more readily effected than with the prior construction, and is also self-locking.

In the machine of the prior application, the presser foot remains down on the work on stopping the machine, a separate treadle being employed to raise the presser foot thereafter to release the work. As the presser foot herein shown does not bear on the work in line with the perforations, and cannot therefore be used as a center about which the work may be turned, it is necessary that the presser foot should be raised when the imachine is stopped momentary merely to turn-the work. To avoid a separate treadle 2 is a collar 6.

actuation at this time, this invention .provides means by which the presser foot is automatically raised on the stopping of the machine, leaving the work free immediately for any manipulation desired.

.Means is also provided for adjusting the vertical position of the 'presser foot, and for locking it in adjusted position.

For more complete understanding of this invention, reference may be had to the ac companying drawings illustrating embodiments thereof, in which,

Fig. 1 represents a front elevation of a punching machine equipped according to this invention, the front cover plate being partly broken away;

Fig. 2 is a left end elevation with parts broken away,

Fig. 3 is avertical section through the feed actuating crank disc;

Fig. 1 is an elevation of the same;

Fig. 5 is a diagrammatic view showing the effect of properly and improperly adjusting the feed when using an unsymmetrical gang punch;

Fig. 6 is a detail cross section showing the presser foot adjustment; and

Fig. 7 is a fragmentary cross section through the crank disc and pin illustrated in Fig. 4.

The numeral 1 represents the machine frame having a standard 2 and an overhanging arm 3, both standard and arm being hollow to enclose certain of the mechanism. Journaled longitudinally of arm 3 in suitable bearings is a punch actuating shaft t and in line therewith axially is a drive shaft 5 which may be driven in any suitable manner as by means of a belt pulley. Fixed to shaft 5 within the standard A similar collar '7 is made fast to the actuating shaft 4:, and has on the end thereof adjacent collar 6 an eccentric 8 serving to drive a vertically disposed rod 9 which actuates other parts of the machine not material to this invention. Clutch member 10 is slidably mounted on shaft 4: and is prevented. from turning relative thereto by pin 11 fast at one end therein and projecting throughaperforation in collar 7 and through eccentric 8, and at suitable times also into a perforation in the collar 6. When pin 11 extends into collar 6 shafts 5 and dare clutched together for simultaneous rotation, while withdrawal of the pin 11 from the perforation in collar 6 serves to disconnect shaft t from drive shaft 5. Coil spring 12 bears one end against the clutch l0, and at its other end against a collar 13 adjustably fixed to shaft i, this spring serving to force clutch 10 in a direction to couple the shafts i and 5 by means of the pin 11 engaging within the perforation in collar 6. Clutch 10 is provided with a cam groove 14; for engagement with the upper end'of a lever 15 fulcrumed on the machine frame at 16, this groove being so shaped asto impart an oscillatory movement to lever 15 when the clutch member is rotated and held from sliding movement on shaft l. Integral with the clutch 10 is a stop cam 10 and carried by the machine frame is a stop 10 which when the clutch. 10 is out of clutching position'may be engaged by a suitable stop shoulder on cam 10. When the clutch 10 is in clutching position, however,the cam 10 is out of the plane of the stop 10. The lower end of lever 15 impinges atcertain times on a vertically slidable abutment pin 17, which is normally held in raised position in the path of motion "of the lever 15 by any suitable means, such as a spring (not shown) but maybe retracted at will by means of a lever 18 engaging the lower end thereof which may be rocked by the-operator in any manner, for example as disclosed in the above mentioned application by a push rod 18'.

Shaft i also carries a double cam member 19 and 20 fixed thereto which is constructed to produce the punching and retracting motions of a punch 21. ina manner fully disclosed in the above mentioned applica' tion. Punch 21 is carried by a rod 22 slid able in guides 23, 23 carried by the horizontally swinging lever 24 ournaled on the vertical pivots 25 and 26 to the frame of the machine. Actuating rods 27 and 27 are pivoted to the punch at their lower ends, and at their upper ends engage a cam follower 28 actuated by the cam 19 and connected to a cam follower 20 actuated by the cam 20 in a manner fully disclosed in the above application by which means the punch is given its punching and retracting movements. All

' the mechanism so far described may be the cation.

same as that in the above mentioned appli- .The outer end of shaft 4 has a crank disc 29. This crank disc is provided with a radial slot 30 having a guideway for a sliding block 31'which carries'thereon the crank pin 32. Threaded within the block 81" is an adjusting screw "33 journaled in the crank disc 29 and having adjacent one end there carried within the disc 29, and fixed to turn therewith and seated in a depression in the outer face of disc 29, is an indicating wheel 37 divided into suitable graduationsya suitable datum line 38 being made adjacent the circumference of the indicator wheel on the face of the disc 29. Journaled on the crank pin is one end of a link 40, the other end of which pivoted to a lever 41 pivoted at 42 to machine frame. f desired a bushing 32 may be interposed between pin'32 and link 40 and a nut 32 screwed on the outer 'end of pin 32 may be employed to prevent endwise movement of pin 32 and add to'the rigidity of the parts when in adjusted position. 43 is a lever connected to lever 41 to rock simultaneously therewith about pivot 42, the outer end of lever l3 being pivotally connected by an extensible link i l to the lower end of the lever 24 adjacent the hearing 23.

Adjacent the pivot 16 0f the lever 15 is .tends under the outer end of a dog 51 fixed to a rock shaft 52 extending toward the punch mechanism. A. dog 53 is also fixed to rock shaft 52 and projects beneath an. abutment 54 carried bytubular rod55 made fast at its lower end to a presser foot 56. Presser foot 56 has a blunt pointed, workoontacting face 57 which may engage the work slightly to one side of the line of action of the punch 21. The presser foot 56 is guided for vertical sliding movement on stationary guide 58.

Near its upper end rod 55 has sleeved thereon a lifter member 59 the upper end of which has a pin 60 projecting within a groove of a cam follower 60 engaging a cam 61 fast-to shaft 4. This cam is so forinedas to raise the lifter 59 during the feed motion of the punch. and to maintain it lowered during the punching actionrand the retrac tive motion of the punch; This lifter member has a transverse pin 62 passingthrough a slot in the rod 55 and bearing against the upper end of a coil'spring 63 which normally forces the rod 55 downwardly to the limit of threaded at 64, and the upper end thereof is split as shown at 65. A collar 66 is threaded over the upper end of a rod 55 in position to be engaged by sleeve 59 whereby .cam 61 raises rod 55 thus raising the press er foot. The collar 66 may be adjustably fixed on the upper end of rod 55 by means of a threadedplug 67 having a slot 68 its upper end to be engaged by a screw driver and having a conical lower end 69 arranged to engage within the bore of the tubular rod 55 to expand the split portion thereof into lockingcngagement with the collar 69.

The operation of this mechanism is as follows: In the normal operation of the ma chine, clutch 10 is slid to the right, as shown in Fig. 1, the pin 11 engaging within the perforationi-n the collar 6, thus coupling shafts 5 and 4 together for rotation, whereupon cams l9 and 20 impart vertical reciprocation to thepunch 21 to punch and retract from the work. The feed motion of the punch is produced by the action of the V crank pin 32 acting through link 40, levers 41 and 48 and link 44 to swing the punchcarrying lever 24 horizontally. In order to adjust the amount of such feed, it is only necessary when the machine is stopped to loosen nut 82 and to insert a screw driver through an opening in the top of the machine frame and through the opening in plate 34 and into the slot 35 of the screw 33, whereupon by turning the same the slide 31 may be moved toward or from the axis of rotation of the disc 29, thus decreasing or increasing the eccentricity of the crank pin 32 and consequently the extent of the feed motion of the punch. "When in proper position, tigh"' ening of nut 32 holds the parts rigidly in position.

lVhen using an unsymmetrical gang punch,

it is necessary that the feed be adjusted ac cording to the distances between the punch elements, in order to produce a symmetrical effect on the work, consequently the feed adjustment must be accurately made. 5 shows the effect of proper and improper "feed of such a punch, the upper line showing the proper feed, and thelower lin-e showlng a feed which is too great. In order to insure the correct feed for each particular punch, it is contemplated that each punch should be marked with certain indication, and thatthe indicator wheel shall be marked with corresponding indices. The multiply -1ng indicator provided by the worm and worm gear provides a micrometer adjust 'ment of the feed, and a very accurate regulating of the feed setting, it being only necessary to turn the 'COllGSPOIlCllDQ m6 2; on

wheel 37 ,to the datum line'marked on the disc to insure the correct setting of the feed.

While the machine is in operation, the

' lever 15' is osciilated'back and forth at each revolution-of the shaft 4,. When it is desired to stop the machine, abutment 171's raised by any suitable means, such for example as those disclosed in the above mentioned application, into the path of the lever 15, thus preventing its oscillation. The action of the cam follower within the cam 14 forces the clutch cam to the position shown in Fig. 1, thus withdrawing the pin 1.]. from the perioration in collar 6 and disconnecting shaft 4 from the drive shaft 5. At the same time clutch 10 will serve to swing the upper end of lever 45 to the left. pin 46 of said lever engaging the bell crank lever 48, whose arm 50 will be raised raising dog 51 and through rock shaft 52 raising dog and through abutment 54 raising the presser foot rod 55 and the presser foot 56 from the work. The movement or" the clutch 10 to the left also brings the stop cam 10" into the plane of the stop 10 which acts at a suitable point in the revolution to engage the stop shoulder on the cam 10 causing the stopping of rotation of shaft 4. When it is desired toadjust the vertical setting of the presser ioot, this may be done by unscrewing the plug 67 from engagement with the ripper end of rod 55 whereby collar 66 may be screwed to adjust the rod 55 up or down at will, and plug 67 may then be again screwed intowedging contact within the end of rod 55 to lock it against the walls of the collar 66.

Having thus described certain embodiments of this invention, though it is evident that many changes and modifications may be made therein without departing from its spirit or scope, what is claimed is,*

1. in a punching machine, a punclnmeans including a stop motion for imparting work piercing and retracting movements to said punch, a presser foot arranged to engage the work during the punching operation, and connections from said stop motion to said presser foot acting to raise said. presser foot from the work on stopping the machine.

2. In a punching machine, a punch, a drive shaft, a punch actuating shaft, a clutch slidable axially of said actuating shaft into and out of position to clutch said drive and actuating shafts, a presser foot arranged to engage the work, and means actuable by the sliding of said clutch out of clutching position to raise said presser foot from the work.

3. In a machine of the class described, tool, a drive shaft, a tool actuating shaft,

a clutch movable to clutch and unclutch said eratedupon by said tool, and means actuable by the moving of said clutch to unclutching position to raise said presser foot from the work.

4. In a machine ofthe class described, a tool, a drive shaft, a tool actuating shaft, a clutch slidable axially of said actuating shaft to clutch and unclutch saidd-rive and actuating shafts, said clutch having a cam groove therein, a lever pivoted at a fixed point and carryingon one arm a cam follower engaging said cam groove whereby said lever is oscillated by the rotation of said clutch when in clutching position, means actuable to hold said lever from oscillation whereby said clutch is moved to unclutching position by said cam groove and, follower, a presser foot arranged to engage work operated upon by said tool, a rock shaft, connections between said rock shaft and presser foot whereby rocking of said shaft in one direction raises said presser foot from the work, and means actuable on the sliding of said clutch out of clutching position acting to rock said rock shaft to raise said presser foot.

*5. In a machine of the class described, a tool, a drive shaft, a tool actuating shaft, a clutch slidable axially of said actuating shaft to clutch and unclutch said drive and actuating shafts, a presser foot arranged to engage work operated upon by said tool, a lever rockable by the sliding of said clutch and connections between said lever and said ating shafts, a presser foot arranged to engage work operated upon by said tool, a rock shaft, connections between said rock shaft and presser foot whereby the rocking of said shaft in one direction raises said presser foot from the work, a lever rockable by the sliding of said clutch, and connect-ions between said lever and rock shaft whereby the sliding of said clutch out of clutching position rocks said rock shaft to raise said presser foot from the work.

7. In a machine of the class described a tool, an actuated shaft for said tool, a stop element carried by said shaft to move there with, a second stop element, means to move said stop elements relatively into and out of cooperative relation to stop said shaft, a presser foot arranged to engage material operated upon by said tool, and means actuable simultaneously with the movement of said stops into cooperative relation to stop said shaft acting to raise said presser foot from the work. I

8. In a machine of the class described, a tool, an actuating shaft for said tool, a stop element carried by said shaft to move therewith, a second stop element, means to move said stop elements relatively intoand outof cooperative relation to stop said shaft, a

presser foot arranged to engage material presser foot, a rod connected to said presser foot, a lifting element sleeved on said rod, an adjustable abutment on the upper end of said rod and engageable by said lifting element, and means for locking said element to said rod in adjusted position.

10. In a machine ofthe class described, a

presser foot, a rod connected to said presser foot, a lifting element sleeved on said rod,-

an abutmentv adjustably sleeved on said rod above said lifting element, and means for expanding said rod into locking engagement with said abutment.

11. In a machine of the class described, a presser foot, a rod connectedto'said presser foot and provided with a split, screw threaded upper end, a lifting element slidably sleeved on said rod an abutment collar screwed on said threaded end above said element and means for expanding said split end to lock said rod to said collar.

12. In a machine ofthe classdescribed, a presser foot, a tubular rod connected to" said presser foot and provided with a splitscrew threaded end, a threaded collar screwed on said end, and a member engageable within said rod to wedge the split end into locking engagement with said collar.

13. In a machine of the class described, a presser foot, a tubular rod connected to said presser footand provided with a split'screw threaded end, a threaded collar screwed on said end, andmeanscarried by said collar and engaging within said rod to force the engaging the threads of said collar and having a conical end facing the end of said rod, whereby the turning of said plug in a direction to force said plug against said rod wedges said split end into locking engagement with said collar. I

15. In a machine of the class described, a

resser foot, a tubular rod connectedto said presser foot and provided with a split screw threaded end, a collar screwed over said end, a plug threaded in one end of said collar and having a conical end facing the split end of said tubular rod and means by which said plug may be screwed into engagement with said rod whereby said conical end is forced into said split end to wedge said split end into locking engagement with said collar.

In testimony whereof, I have signed my name to this specification.

DONALD NOBLE.

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