US1108898A - Ejecting mechanism for presses. - Google Patents

Description

J. H. GARRATT.

BJECTING MBSHANISM PoR PRESSES.

APPLICATION FILED AUG. 2, 1913.

Patented Sept. 1l, 1914.

3 SHEETS-SHEET 1.

Sneeuw@ J. H. GARRATT. EJEGTING MBGHANISM POR PRESSES.

APPLICATION FILED AUG. 2, 1913.

Patented Sept. 1, 1914..

LSS.

3 SHEETS-SHEET 2.

J. E. GARRATT. EJEGTING MEGHANISM Poe PRESSES.

y APPLICATION FILED AUG. 2, 1913. l y 'ja @$90 Patented Sept. l, 1914.

3 SHEETS-SHEET 3 7 n O o 1.5 53 z E lum Z al 54 2i! lulumlul l umm f1 UNITED STATES;

PATENT E,

.JAMES H. GARR/ATT, F ROCHESTER, NEW YORK, SSIGNOB 0F ONE- 'E0 HALBEBT GREENLEAF BROOKS, 0F ROCHESTER, YORK.

EJECTING ME-CHNSM FOR PRESSES.

1l,ll08,898.

Specification. of Letters Patent.

Application led August 2, 1913. Serial No. 782,583.

To all whom it may concern:

i Be it known that l, JAMES H. GARRATT, of Rochester, in the county of Monroe and State of New York, have invented certaln new and useful improvements .in 'Ejectlng Mechanism for Presses; and l do hereby de- Clare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings,-

forming a part of this specification, and to the'reference-numerals marked thereon.

' My invention relates to an 'ejectmg or knock-out mechanism for presses, more particularly with reference to sheet metal die presses a d the like, and it has for its primary vobject the provision of means for auoperative l die has commenced its upward stroke.

a blank for the next suc- To these and other ends, the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features be-, y325` ing pointed out in the ,claims at the end of the specification.

In the drawings: Figure 1 is a front elevation, with parts broken away, of a die press, showing the application of one embodiment of the invention; Fig. 2 is a side elevation of the ejecting mechanism and feeding receptacle; Fig. 3 is a plan view of the parts shown in Fig. 2; Fig. 4 is a detailed sectional view, on theline of Fig. 6, of a portion of the vejectmg mecha-- nism, showing the operating device; Fig. 5 is a similar lview on the line 5L-5 of Fig. 8; Fig. 6 is a bottom plan view of the parts of the ejecting mechanism, as they appear in normal position; Fig. 7 is asimilar view showing the position of the parts when'the operating device has completed its stroke,

and just prior to thel release of the ejector; v

Fig. 8 is a similar view showingthe posi'- give his entire attentionto tion of the parts when the ejector has completed its movement in one direction and is about to be returned to its normal position, by the actuator; Fig. 9 is a sectional yview on the line 9aa of Fig. 6 looking toward the left of the figure; Fig. 10 is a sectional view on the line 10e-l0a of Fig. 6; Fig. ll as an enlarged view in section ot the lock or escapement mechanism, on the line 10-l0a lof Fig.; (3, looking toward the right of the ligure, and showing the parts in normal position; Fig. 12 is a similar view showing the position of the parts after the initial movement of the ejector, and Fig. 13 is a simi- :lar view showing the position of the parts after the release ofthe ejector and immediately prior to its operation. l

Similar reference numerals in the several ligures indicate the same parts.

For a general understanding of my in- .vention, it may be stated that in the operation of die presses and punches and similar imachines, it has been necessary for the operator to manually knock the work from its support Aafter the completion of each operation and before another blank can be inserted ,for the next succeeding operation. This requires considerable dexterity, and involves a great deal of danger as the work not infrequently adheres more or less to the plunger .and is carried upwardly therewith, often resulting in injury to the fingers of the operator. It is my purpose therefore to relieve the operator entirely of this duty by making the discharge of the work automatic after each operation, so that he may devote all his attention to the feeding in of fresh blanks. This results in enabling the work to be done much faster .than heretofore, giving increased eiiiciency to the machine, and also eifectually preventing any possibility of injury to the operator Jf'rom this source. .The invention is susceptible of various ap fplications and 'itlv is 'to be understood that :the present embodiment is shown for the purposes of illustration only, and is not intended as limiting the scope of my improve'- inent in any particular to a speciic construction.

In the present arrangement, which I have `found to be a practicable and successful adaptation of the invention, 1 designates the plunger of the press, which may be of the l#usual form of construction, and is provided with a die 2 operating to engage a blank' on the work support 3. v'The plunger 1 1s further provided withan arm4, which may or may not-be removable, as desired, and carries a downwardly extending arm .5 arranved to eiiect the-operation of the ejecting mechanism in a manner which will appear more clearlyhereinafter. y

The ejecting mechanism is arranged in a housing 6 which is preferably mounted. on legs or standards 7, to one of whichfis secured a locking bar 8. l j e 9 designates a feed basket or a hopper having a mouth 10 throu h which the blanks may be 'fed onto the wor support, while 11 designates a protective wall or grating c X: tending upwardly from the basket at lts ends, and atthe side adjacent to the mouth 10 so as to prevent the hands of the operator from coming in contact with the plunger lof the machine where it enga es the work.

The 'basket lis provided with `forwardly extending legs '12 which engage recesses 13 in the locking bar 8 and are held in engagement therewith bythe pivoted latches 14 arranged upon the bar 8 and coperating with recesses in the legs 12.

The ejecting mechanism embraces an ejector -15 which has an oscillating movement across the top of the work support and between it and the die lunger, the parts being so timed as to e ect movement of the ejector at an instant just after the comple'- tion of the downward stroke of the die and during its initial upward movement, whereby the ejector will engage the work whether it be restin upon the worksupport or adhering to t e die. To this end, the ejector 15 is mounted upon an ejector member 16 which is arranged for an oscillating movement about the pivot post 17. Also mounted on the'pivot post 1 is an actuator 18 arranged adjacent to the ejector member 16 and having a shoulder 19 against which the latter abuts, while 20 is an arm upon the actuator to.which is connected a spring 21, the latter having its opposite end secured to a corresponding arm 22 on the ejector member. It' will be observed that the lower faces of the. arms 20 and 22 are in the same horizontalv plane and that thespring' 21 tends to draw the ejector member toward the actuator when the parts are in the position shown in Fig. 7. The actuator 18 carries Ian ear 23 to which is connected a spring 24 having its other end attached to a post 25. The last mentioned spring 24serves'to eli'ect the return of the actuator, and of the ejector member carried therewith, to their normal positions, causing the quick return movement of the ejector after it has discharged the work,

as will be described moreclearly presently. 26 is a carrier, also pivotally mounted on the post 17 with the ejector member. The

5 carrier is provided with an ear 27 to which Vcarrier 26 b consisting o a pawl 39 which is pivotally is engageda 'spring 28, the latter also being connected to the post 25 and operating to "mounted for reciprocating and rotating movement, and kis designated at 30.

31 is a cam slot 'cooperating with a proyjection 32 on the housin whi e '33 is a cam .face at the lower end o the plungerwhicli engages thebeveled edge 29. As downward .movement is imparted to the operating de'- vice, or plunger, a corresponding swinging `movement of the carrier is effected, and the: rotating motion of the lunger causes the cam .face 33 to `follow'the evel edge 29 closely, 1and to remain constantly in the same rela tion thereto. The lunger is adjustable, to -provide for operating with different thicknesses of work, and to this end it hasa gthe threaded stem 35, the latter being roivided with a bearing 36 on its upper sur ace farranged to be engaged by the arin 5 when the plunger of the press travels downwardly.' 37 is a lock` nut for holding the stem 35 in its adjusted position, and 38 .is a springI for returning the plunger to its normal position upon' the upward movement of the die. The actuator 18 is normally held to the a locking means, preferably lmounted at 40 upon the carrier and engages la coperating recess or notch 41 on the actuator. The pawl 39 is held in operative engagement by means of a spring 42, its movement being limited by a stop 43. The ejector member 16 carries a latch 44 which is pivot- .;ally mounted at45 and is adapted to engage von opposite sides of Athe pawl 39 as shown in Figs. 6 and 8 respectively. The latch 44 carries a tail piece 46 which is engaged by' 'a stop 47 when the partsxare in normal position as shown in Fig. 6, whereby the'latch gis positioned to eilect engagement of the :pawl 39 with the actuator. l j

48 is a leaf spring positioned on the ejector member, engaging the tail piece 46,

so as to eii'ect movement of the latch 44 to the position shown in Fig. 8, in order to disengage the pawl 39 from the actuator.

ses

threaded opening at .the top which receives This operation releases the actuator and permits it to return the ejector member to its normal position quickly, and while the carrier is at the beginning of its return movement.

The ejector member is held in normal position by a lock which preferably embodies an escapement mechanism operating in such a manner as to release the ejector for a par-4 tial and limited movement when the die reaches they limit of its downward stroke, and to entirely release the -ejector for its 'momes operative and return movement, the instant the die commences .its upward stroke and-v beore it has moved an appreciable distance from the work support. 'IoA this end, the ejector member carries. 'a pair-otl teeth: 49 and 50 arranged -inthe-manner shown in Figs. 11 to 13 inolusivegfand mounted on the extension 5l. with the teeth 49 and 50 is "a Itooth 52 carried by the lockinglever 53, yvloich ispivotally mounted on the post 54 and carriesA an arm 55. 'Ihe locking .lever 53 is loosely pivoted so as to have a movement in two planes, its vertical movement being controlled by the leaf spring 56 while its lateral movement is resisted by the spring 57. f

58 is a-post for determining the position ot the locking .leverA when in its normal relation to the remaining parts.-

'Ihe carrier 26 is provided. wlth an extension or arm 59 which coperates .with 'the arm 55 on the locking lever in such armani@ ner as to rock the latter on a horizontal pivot, moving it avertical plane and thereby removing the tooth 52 fromv iin I.normal position as shown in Fig-..11 where it engages the tooth 49,tothfplanefof the tooth 50 causing it to assume the position,l shown in Fig. A12, and permitting the ejector. member a corresponding lateral movement.,

It will be seen that the parts retain the position last described as long as the extension of the carrier is in engagement with the arm of the locking lever, and as soon as the latter is released, it assumes its normal po-v sition, releasing the tooth 52 from engagement with the tooth 50 so that the parts take the position shown in Fig. 13, and the ejector member is free to be carried toward the actuator by means of the spring 21. When the ejector member reaches the shoulder 19 of the actuator, the latch 44 will have released the pawl 39 from engagement with the actuator, and the latter is then free to return to its normal position under the aetion of the spring 24, thus carrying the ejector and the actuator back to the position shown in Fig. V6. The return movement of the carrier is governed by the upward movement of the plunger 30, whichv in turn depends upon the return movement of thedie plunger.

The operation of the machine, briefly described, is as follows: With the parts arranged as shown in Fig. 6, the plunger 30 is depressed by the downward movement of the die plunger and effects a corresponding swinging movement of the carrier 26, the actuator 18 being moved with the carrier during the last-mentioned operation by the pawl 39 until the parts assume the position shown in Fig. l7. At this time, the eXtension 59, has engaged the arm 55 on the locking lever 53, moving it in a vertical plane so as to release the tooth`49 and to engage Arranged! r' .for -coperation- Itheitooth 50. `f'lfhis is 'thepositionwhen Jthe die is at the downward limit of itsy stroke.

the carrier is permitted a4 slight return moveiment, under-the action .of the spring 28. g 'llhis ltrees.r the lock-ing. lever v.53,- and the latf terlsreturned lto its .normal position bythe. spring 56, which movement ,releases the ,toothfand allows the spring .2l to move fthe ejector laterally. until' .the ejector mem-i. ber comes into engagementfwith the shoul- ;der .'19 of the actuator. ."Ilhis movement of l the e jector causes the worlritobesvvept inem the work-support into any convenient re. ceptacle ythat mayl :be provided, the ejector being immediately returned yto its :normal positiom-in order to permit Ythe operator to position ablank-orthe next succeeding operation while the die is=eompleting 'itsnpf Qward movement.l At the limit of the forw ard .movement of `the :ej actor, :'.the actuator:

;44 .With'the pawl 39- as shown inFig. 8, the

the contactbetweensaid latch and pawl is normal position. 'Ihe spring controlling the actuator. thereupon returnethe letter te. its y,firstposition, and with it the ejector meinber. The latch 44 is engaged by the stop 47 whenthe ejector member reaches its normal position, causing it to assume the position shown in Fig. 6. As the plunger 30 arises upon the upward movement oi the die, the carrier 26 is returned to its normal position. The pawl 39 again engages the notch 41 in the actuator, and the parts are ready for the next operation. v

Although I have described the invention as embodied in what seems to be a preferred form, I do not limit myself t'o any of the details or arrangements herein set forth but intend to cover by this application any modi- ,fications and changes that may come generally within the scope of my'invention, and of the claims of this application.

I claim as my invention:

1. In an ejecting mechanism for die presses and the like, the combination with an oscillatoryv carrier, of an oscillatory ejector` member movable independently of the carrier, an actuator mounted on the carrier, a reciprocatory operating device, and means actuated by the operating device for imparting an oscillatory movement to the ejector member.v

presses and the like, the combination with an oscillatory carrier, of an operating plunger mounted for reciprocating and rotative movement and coperating with the carrier, an oscillatory ejector member movable independently of the carrier, andl an actuator mounted on the carrier and adapted to be y As soon as it commences to moveupwardly,l

l 18.v is releasedsby the engagement of the latch lmovementcf-ftheparts being so quick that jsuicient to permit the actuator to :be with," idrawn beforetheapawl 39 can-recover its 2.4In an ejecting mechanism for die mofvedivin'de eiidently' thereof to e'eot- Infove-- menboffbh 'ej'ectormemben- 1 rf M. 3. "Ingen, fejeotingwmeohanism'f for die pressesl :andthe like, the =combination Iwthf- 5; anosollatory: carrier, of-a recigrocetdry op(- veretng'fdevice' ooperatng wit `.the1::i1'rrie",` an oscillatory: ej eotor fmembe movable in--r dependenblyl o1? the ouvrier, acl an 'ectuatormounted .im f1-theo carrier and arranged to im eeet: moyement of fthe ej etor .memberzj "fi Vz it against movenneum.. u1?- w. l, l l J 5; In an :ej'eoting mechanism; for die presses andthe like', AtheY.combnwbon,.with a, crrer, vof a reciprooetng' operetmgfevce oo'peratng with `who Ycarrier, en oecidilatory ejector'v member, an actuator momtedsonthe carrier and movable :independently thereof,

means on the carrier for 'looking the actu'etor, and mesme on.v theeleotor member -'for museos operatngad'looking means to release 'fthe actuator frortheoarier.-

`Insn ejectingff mechanism for-del presses andthelike, :the-combination with a 1 oarrier, ofen loperatin i wlrth'the'carrer, en-'osc atory ejector member, eindje leek for1=the ejector member, the

l carrier' being 'arranged to "engage Said look igudevice coperating atory kejector mem,

rer being arranged to engag-seid lock to .-4

,effect release of the .ejector.member, an actuator mounted. on -the carrier, locking means. disposed on the carrier and-'coperabmg .with @the actuator to hold it against movement on the cmrrieriy and means arranged on the ej eater l' member tnotor.; 'f

JAMESH- ennnnfrr.`

"Wtnessess" m, f

' -RUSSELLB GRmmTH,

v- 'a l 5 Smolmmm'mn.

Ito afecta/*release of the no -l

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