US2202483A - Control for turret type presses - Google Patents

Description

May'28, 1940. J. M. news-:Yl 2,202,483 I I qoN'rRoL FOR T'URRETTYPE rREssEs v Fiied sept. 19, 193e 2 sheets-sheet 1.

J. M. DEWEY v2,202,483

CONTROL FOR TURRET TYPE PRESSES Filed sept. 19, 193s May 28, 1940.l

2 sheets-Sheet 2 -a//ya/ I /3 .fa/ J3 Jaa l f/ ...k 53a 0 o c o Y WJ, o

v 'I 20d 2g y z2 z INVENToR v JAMES M. DEWEY With a pressing head andwherein the operator.

Patented lIVI-ay 28, 1940 UNITED STATES vP ,Aijerrr oFFlce CONTROL FOR TURRET TYPE PRESSES A Jaimes M. Dewey, Cincinnati, Ohio, assigner to U The American Laundry Machinery Company, Norwood, Ohio, a corporation of Ohio Application September 19,- 1936,V Serial No.1101,641 'l Y' 3 Claims.

This invention relates to improvements yin control mechanism for presses.

In presses [of the type in which a pressing bed is movable laterally into and out of registration Varranges the Work on the bed when it is in its out-of-registration position, the press operating mechanism is often-positioned remote from the operator. An yobject of `the. present invention is to provide a novel .control mechanism in such a press whereby the pressoperation is causedV upon actuation o-f a servo-motor, the control for which is arranged in a novel manner adjacent the Working 'position of the operator. My invention is `particularly applicable to .pressing beds having a vWork-receiving` surface longer than the normal reach of an operator and wherein the operator is required to moveabout the bed when arranging Work thereon. A' feature of the present invention is the arrangement of control means for causing press operation ,accessible to the operator when standing in different positions about the pressing bed Whilearranging Work thereon.

My invention is particularly applicable to the type of pressingmachine in whichk a plurality of pressing beds are alternately movedinto and out" the turret rotating and pressure producing' .mechanism. My inventionalso includes index-r ing mechanism insuring that suchk bed {is in porper position before a pressing operation takes place.

Other novel features .Willbe found in the structural arrangements by which I accomplishthe ends pointed out, all of which will more clearly appear in the accompanying drawings as de.- scribed in the speciiication and the essential rfeatures will be set forth in the claims.`

AIn the drawings, Fig. 1 vis a front elevationof a pressing machine embodying my `novel control mechanism; Fig. 2.is a sectional plan View taken on the line-2 2 of Fig. 1 land showing -the'presv (ores- 22) ing beds in dash-dot lines to indicate their position relative'to the structure shown in full lines; Fig. 3 is an enlarged detail vvievv taken on the lline 3 3 ofFig- '2; Fig. 4 is a diagrammatic View .i

of the control mechanism; While Fig- 5 is'an en- 5 larged View taken von the line 5`j5 of Fig.` 1 showing a portion of the turret Yturning mechanism' I have illustrated myinvention as applied to a pressing machine of the type used in the laundry industry and generallyv referred to as the '10 turret type. A base I0 supports a central column 'l I andra pair of sidecolumns I2. rThese columns at their upper ends support apressing head I3 in fixed position. Rotatably mounted upon column II is a frame I4 having oppositely extending arms supporting. beds I5 and I6 respectively.y

which r.by frame rotation are alternately moved into and out of registration lwith the head' I3; In the form illustrated thev bed I5 is arranged'to press the front and a .portion of the shoulders of Va mans shirt, and the bed I6 is provided with a buck adapted to iron the entireback and a portion of they shoulders 'and sides of a mans shirt, however, it will be understood that my improved control mechanism is useful in other types of pressing operations. The

pressing beds illustrated are long enough to accommodate mens shirts'of large sizeand sufyi Aciently long to pressa portion of the shouders of the shirt and such pressing beds are of -such length ythat an operator in arranging Work there- 'Y oncannot reach both ends of the work-receiving surface at one time and must move about the Cer.-

tain features of my invention are Aapplicable to pressingv bed in arranging `Work thereon.

pressing `membersfof this large size.

Each of the pressing beds has a downwardly t extending stem which',4 ,When the bed is in regis.. y

tration beneath the pressing head, lies directly over the piston rod Ila connected with a .piston l -I'I `which is housed in a cylinder IIS Withinthel base Iii. Pressure fluid is supplied to cylinder lI8 by Way of conduit ISand'a combined' inlet and outlet yvalve mechanism 2t.

uid from supply conduit 2I to cylinder it or to exhaust the same through the' outlet pipe '22.

The mechanism for rotating frame Ill of the type fully shown and rdescribed in Patentr No.

1,997,219,v granted April 9, 1935, toO. W. John-J son, and `Will be only briefly described here; A

bracket 23 mounted on the base I0 carriesa pin T24 whichr forms .a pivot `for a bellcrank which is normally vbiased for V,movement in :a :counter- This mechanism A, comprises an inlet valve 20d and an outlet valve 20h operable by`a lever 20c to .admit pressure to cylinder 48 to raise piston 4l.

clockwise direction as viewed in Fig. by a spiral spring 25, one end of which is secured to the bellcrank. The arm 25a of the bellcrank is bifurcated and carries a pair of pins 2l. A rod 28 is movable with piston II and slidably thereon carries a block 29 which is moved upwardly by pin 3&3 when piston II rises and is moved downwardly by pin 3| when piston I1 falls. When piston Il moves up block 29 engages pins 27 as shown in Fig. 2 and rotates bellcrank 25 in a clockwise direction as shown in Fig. 5 causing the arm 25h of the bellcrank to rst pass by a pawl 32 carried by one of the arms of frame I4 and thereafter the arm 25h rests against the end of pawl 32 in the position shown in Fig. 5. When piston Il drops sufficiently for pin 3l to engage block 29 and move it below the position shown in Fig, 5, the pins 21 allow the bellcrank 25 to rotate in a clockwise direction, as viewed in Fig. 5, and spring 26 then causes rotation of frameIlI 180, moving oneof the beds out of registration and the other into registration with the pressing head. The other arm or frame I4 carries a paw] 32a which coacts with the bellcrank 25 in a manner similar to that just described.

Means is provided for snubbing the frame rotating movement as each bed approaches registering position. This comprises an oil lled check 33 which is connected by a link 34 with a lever 35 pivotally mounted on the frame at 35. Pins S'I and 37a, one on each arm of frame I4, ride against the cam surface 38 as each pressing bed approaches registering position and the resistance of the oil check 33 thus snubs the movement of each bed into registration.

The operating mechanism for the valves in casing 2li comprises a lever 3S pivotally mounted at is and having a branch 35a which is pivotally connected by link 4I With a lever 42 which in turn is pivotally mounted on a bracket at 43.

Beyond the pivot lever 42 is biased by a compression spring 44 for movement in a clockwise direction as viewed in Fig. 3. The upper end of lever I2 has a slotted connection with pin 45. rIhis pin also forms a pivotal connection. between a locking bar 45 and the piston rod 41a of piston 4'? which is housed in cylinder 48. The upper end oi bar 45 when the bar is in its lower position engages one of the notches 49a or 49h in collar 45 which rotates with the frame I4. When the locking bar engages one of these notches one of the pressing beds is in registration Withthe pressing head. The bar 4S carries below its upper end a notch 46a which registers with collar 49 when the locking bar is in its upper position thus permitting free rotation of collar 49 and the frame Iii.

It will be obvious from the above description that piston Ii'I is normally held in its lowermost position by spring 4d. Pressure fluid is supplied Fluid is provided for this purpose from supply conduit 2| through conduits 5i) and 5I and inlet valves 52 and 53 which are arranged in parallel and normally closed. Either oi these valves when operated will supply iluid through conduit 54 to cylinder 48 beneath piston 4l to operate this servomotor. The mechanisms of valve casings 52 and 53 are exactly the same and one description will suilice -for both. In casing 52 is a normally closed inlet valve 52a. having a stem 52h which is engaged by a pedal 52C. Preferably these control members, namely, pedals 52e and 53o are placed in position to be accessible to the operator when in different working positions about a' pressing bed upon which she is working. In the form shown control member 52e is located near one end of the pressing bed and control member 53e is located along one side of the bed. Therefore if the operator is working near the side or the collar end of bed I5 as viewed in Fig. 2, pedal 53o will be used to actuate piston 41, whereas if the operator finishes the lay of the Work while standing near the tail end of pressing bed I5 the pedal 52e will be used.

With the pressing bed IB in the position shown in Fig. l, spring 44 is holding the arm 39a of lever 39 in its lowermost position, thus holding the valve 20a open and valve 2Gb closed and a pressing operation is carried on between the pressing members I3 and I6. The operation then proceeds as follows: The operator arranges the lay of the work upon bed I5 and actuates either pedal 52e or 53o. Fluid then flows beneath piston 41 which raises locking bar 46 to register notch 46a with collar 49 thus freeing frame I4 for rotation. Simultaneously by link 4I, lever 39 is moved in a clockwise direction (as viewed in Fig. l) closing valve 20a and opening valve 20h. Fluid is then exhausted beneath piston l1 and the piston and pressing bed I6 drop by the force of gravity. When this press opening movement has proceeded far enough 4bellcrank 25, which was placed in the position of Fig. 5 at the beginning of the pressing operation, is uncooked and causes frame rotation 180. It is unnecessary for the operator to hold pedal 52o or pedal 53o in actuated position until frame rotation is completed because the servo-motor lI'I-48 is arranged to trap fluid beneath piston -41 for a long enough period to permit piston I1 to drop and frame rotation to start. It is sufcient for this purpose to arrange the sliding fit between valve stem 52h and valve casing 52 (or between Valve stem 5319 and casing 53) not quite tight. Pressure fluid will therefore leak out beneath piston 4'! slowly. Once frame rotation has started collar 49 in notch 46a will hold the locking bar 46 in its uppermost position against the bias of spring 44 until one of the notches 49a or 49h again registers with bar 46. At this time bar 46 moves downwardly impelled by spring 44 and valves 2ElaV and 20h are again returned to the position of Fig. 4 to supply motive uid beneath piston Il' and cause a pressing operation between the registering bed and head.

What I claim is:

1. In a pressing machine, a pressing head, a rotatable frame, a plurality of pressing beds carried by said frame and movable by frame rotation into and out of registering position beneath said head, motor means for causing relative approach and separating movement between said head and a registering bed, means for causing frame rotation, a circular notched collar rigid with said frame, a reciprocable pin adapted to enter said collar notches for locking said frame.

ried by said frame and movable by frame rotation into and out yofvregistering position beneath sai-d head, motor means for causing relative approach and separating movement between said head and a registering bed, means operable in response to said relative separatingl movement for causing frame rotation, means for llocking said frame against rotation kin each of its bed-registering positions, means biasing. said last-named means in locking direction, a servo-mo-tor for unlocking said locking means and for coincidentally initiating said relative separating movement, a. pressure uid supply system for said servo-motor, and said system being adapted to slowly bleed off the servomotor fluid to hold said locking means unlocked until said separating movement is substantially completed and said frame starts to rotate under the influence of said frame rotating means.

3..In a pressing machine, a pressing head, `a rotatable frame, a plurality of pressing beds carried by said frame and movable by frame rotation into and out of registering position beneath said head, motor means for causing relative approach and separating movement between said head and a registering bedfmeans operable in response to said relative separating movement for bleed off the fluid therein to hold said locking.

means unlocked until'said separating movement is substantially completed and said frame starts` to rotate under the influence of said frame rotating means, and means for charging said sysv tem with pressure fluid including a plurality of actuators located at different stations and operative'by momentary actuation of any one of said actuatorsfor charging said servo-motor supply system. f

JAMES M. DEWEY.

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