US1084631A - Automatic stopping mechanism for corner-staying machines. - Google Patents

Description

E. L. HAZEL & R. HOL'BECHE. AUTOMATIC STOPPING MECHANISM FOR CORNER STAYING MACHINES. APPT-YGATION FILED JAN. 15, 1913.

1,084,631 N Patented Jan. 20, 1914.

2 SHEETS-SHEET l.

wbcmi/ N vg m-wawa E. L. HAZEL & R. HOLBEOHE.

AUTOMATIC STOPPING MECHANISM FOR CORNER STAYING MACHINES 1 APPLICATION FILED JAN. 1s, 191s.

Patented Jan. 20, 1914.

2 SHEETS'SHEET 2.

. To all whom it may concern:

unTEnlsr-Arms ATEN OFFICE.

ERNEST L. HAZEL AND RICHARD HOLBECHE, .OF BIRMINGHAM, ENGLAND, ASSIGNORS TO STOKES 8i SMITH COMPANY, OF SUMMERCDALE, PHILADELPHIA, PENNSYL- VANIA, A CORPORATION OF PENNSYLVANIA.

AuToMATIo s'rorr ne MECHANISM FOR oomvne-sirnYme MACHINES.

Specification of Letters Patent. Patented an 20 1914 Application filed January 15, 1913, Serial No. 742,265.

Be it known that we, ERNEST L. HAZEL and RICHARD HOLBECHE,SL1bjQCtS of the King of Great -Britain, residing at Birmingham,

England, have invented new and useful Improvements in Automatic Stopping Mech-' vanism for Corner-Staying Machines, of

which the following is .a specification.

Our present invention relates to safety automatic stopping mechanism for corner stayingmachines of the type designed to attach corner-stays to the corners of paper or cardboard boxes, and the object of the invention is to provide means for automatically-stopping the machine in case the hand or a finger of the operator should happen to be in the path of movement of the cornerstaying die during its descent toward the anvil with which the die cooperates.

It is a well known fact that the operation of these corner-staying machines, which are now quite generally used by box manufacturers', is attended with frequent accidents to the operatorsoccasioned by the operator carelessly, or from lack -of experience allowing his or her hand, or a finger thereof, 'to comebetween the die and anvil, during the movement of the die toward the anvil-in the .act of applying the stay tot-he corner of a box'and this results in a mashed or maimed Some attempts have been made to obviate this danger in the present-known types of machines, as by providing movable fingergu a-rds that are designed to sweep across the face of the anvil in advance of the movement of the die andbrush or move away any obstruction that maybe in the pathof movement of the die, but these finger-guards, have not been entirely satisfactory since they do not always accomplish the, object for which they are intended.

obstruction of any kind in the pathof move-' ment of said die.

Briefly and generallystated the invention comprises movable members positioned to sweep over the diverging faces of the anvil in advance ofand during the descent-of the ,die, and means actuated by said movable members and cooperating with the driving mechanism of the machine for automatically stopping the same before the die reaches the anvil.

The mechanism is so designed that it may be readily applied as an attachment to known types of machines and without altering the design thereof.

In order to enable othe'rsto understand, make and use our said invention, we will now proceedt'o describe the same in detail, reference being had forthis purpose to the accompanying drawings, wherein:

Figure lis a front elevation of a portion of a corner-staying machine having our improvements appliedthereto. Fig. :2 is a side,

elevation of the same, the driving pulley and 7 the numeral 1,.designatesthe head portion of a well known type of corner-stayin machine, said head having parallel gui es 2,

:between which is mounted a vertically reciprocating member 3,"carrying a die 4 at its lower end, which die cooperates with a stat-ionary anvil 5 having diverging walls, as

is usual in machines of this type. The member 3 with its die 4 is reciprocatedby means of a shaft 6, on whichis loosely mounted a pulley 7 that is driven continuously,.a ballclutch of known construction being inter posed between-the hub 8 of the pulley and a collar 9, fixed to the shaft 6. The ball-clutch embodies as a part of its construction, a disk 10. that normally rotates with the pulley',

said disk having a laterally projecting lug 12 with whicha treadle-operated gag 13 is arranged to cooperate, said gag operating when thetreadle is actuated to move in the path of movement of and be engaged by the lug on the clutch disk in order to shift the position of the same and cause the pulley to run. free and stop the rotation of its shaft, and consequently reciprocation of the die 4 toward its anvil 5.

As the parts just described are of known rotate the latter and reciprocate the die 4,

but as soon as the lug on the clutch disk comes into contact with a gag or other stop thrust inthe path of movement thereof, the

- pulley willimmediately be disengaged from the shaft so 'as to run free thereon which results in instantly stopping the downward movement of the die before it reaches the anvil, the stopping point of the die relatively to the anvil depending upon the position of the lug when it engages its stop or gag. The lug 12 and its cooperating gag 13 are so positioned relative to the shaft '5 that one complete revolution of the pulley with its clutch disk will effect a singlev reciprocation of the die, or in other words, will move the die .down into contact with its anvil and bring it back again to the starting position. It will be apparent therefore, if a second gag is interposed in the path of movement of the lug 12, at a point slightly beyond the initial starting position, as indicated in Fig. 4, the machine will be stopped beforethe die reaches its anvil. We have taken advantage of this operation in applying our improvements to a known typeofcorner staying machine having the form of clutch referred'to'.

It will be apparent, however, that our improvements may be applied to machines having some other type-of clutch or driving I'neans than that shown, without departingfrom the spirit of the invention, the showing here made being only by way of example.

We will now proceed to describe our 1111- provements in detail, which as before stated are shown as associated with a known type of machineand which when broadly stated, embody means operable through the interposition of an obstruction between the corner-staying die and its associated anvil for throwing the die-operating means out of action and stopping the descent of the die; The reference numerals 14, designate a pair of movable guards, consisting in the instance shown of curved or arched plates, one such guard located on each side of the path of movement of the die 4, and each pivoted at its outer end, as at 15, to a bracket 16, attached to the head 1, of the machine and having its inner end arranged to sweep over the adjacent converging face of the anvil 5, during each downward movement of the die 3.

Secured to a bracket 17 projecting outward from the head 1 of the machine is a stud or pin 18, upon' which is loosely mounted for oscillation, a sleeve 19 carrying a pinion 20 at one end, which pinion is in mesh with a rack 21, secured to the outer face of the reciprocating die-carrier 3, the said rack operating to impart an oscillating movement to thesleeve 19, during each reciprocation of the die carrier 3. Mounted upon the sleeve 19 for'movement therewith and also for movement independently thereof, is an oscillatory arm 22, the said arm during the normal operation of the machine, being caused to partake of the oscillating'movements of the sleeve, by means of a very sensitive friction clutch consisting of a pair of fiber disks 23 and 24 one located on each side of the arm 22, and engaging said sides frictionally. The disk 23 isforced into fric-' tional contact with one side of the arm by means of acoiled spring 25,act-ing upon a washer 26, the tension of the spring, and consequently the frictional resistance between the parts, bein adjusted as desired by means of a nut 2 threaded upon the sleeve and acting against the spring, said nut when set for proper adjustment of the spring being held against turning movement by means of a lock-nut 28, also threadedupon the sleeve 19.

The movable guard-members 14 are each connected to one end of the arm 22, by means of the connecting rods 29, so that with each reciprocation. of the die 4, the free ends of the guard-members are caused to sweep back and forth over the diverging walls of the anvil in advance of the die, this operation resulting by reason of the friction clutch connection between the lever 22 and sleeve 19, and occurring so long as there is no obstruction in the path of movement of the said guard-members, but in case there should be any such obstruct-ion present, it will be engaged by one or the other or both of the guard members 14, whereupon the arm 22 will be held against movement, the sleeve 19 turning relatively thereto, this action also being permitted by reason of the friction clutch: connection between the sleeve and arm.

Pivotally. connected to the outer end of the arm 22 is a vertically extending link 30, said link being. pivotally connected at its upper end to a lever 31 pivoted at 32 to a bracket 33 secured to the head 1 of the ma chine frame. 3 The lever 31 is connected at its outer end by a link 34 to one arm 35 of a bell-crank lever, which bell-crank lever is pivoted at 36 to a bracket 37 also secured to the head of the machine frame. The other arm 38 of the bell-crank lever has a link connection 39, with a horizontally sliding gag or looking dog 40, the latter reciprocating freely in a guide 41 secured to the machine frame. During normal operation of the machine the free end of the gag or looking dog 40 is reciprocated back and forth into and out of the path of movement ion connection between the die carrier 3 and sleeve 19, the friction clutch connection be: tween the sleeve 19, and arm 22 and the lever and link connections with the said gag or lockingdog; p

The operation of the machine will be clearly understood from the foregoing description taken in connection with the following brief statement.

Normally the gag 13 is in engagement with the lug 12 of, the clutch disk 10 as shown in Fig. 4, and the pulley 7 then runs free upon the shaft6, the operating parts of the machine being idle. Vhen it isldesired to start the machine the gag 13, by means of 'a suitable-'treadle mechanism not shown, is shifted out. of engagement with the lug 12, and this causes the clutch disk 10 to bring about a locking engagement between the pulley 7 and its shaftfi, the shaft being then rotated to impart reciprocatory movements to the die 4 to cause the same to moveback and forth toward and from and in contact with its anvil 5 in order that the corner stays may be applied to the'box corners as said corners are anvil, it being understoo of course, that a strip of stay material is fed over the corners of the box as they are presented to the anvil, During each successive downward 1 engaged thereby.

movement of the die the guards 14 sweep across the corners of the box in advance of the downward movement of the die, and so long as there is no obstructionof any kind in the path of movement of the guards the free end oft-he gag 40 will, with each reciprocation of the die, be thrust into the path of movement of the lug 12, which now rotates with the drive shaft 6, but will be withdrawn out of said path before the log 12 can make contact therewith and the machine willrun continuously in this manner. If, however, an obstruction of any kind, such for instance as a finger of the operator, should chance to be in the path of move-' inent of either of the guards 14 duringthe descent of the die, such obstruction will instantly stop further downward movement of the guards, with the gag 40 including the friction clutch connection of the arm '22 with its oscillating means, which friction clutch prevents relative "movement between the arm and sleeve, will maintain said gag in the path of movement of the lug 12, so as to be clutch the pulley 7 from its driving connection with the shaft 6 to cause the same to run -tion of the lu osit-ioned over the and through their connections- When so engaged the disk 10 will be shifted to disengage,

free from the shaft, whereuponthe machine will be instantly stopped, the die 4 coming to a st'ate of rest before it reaches its anvil 5, this being dueto the fact that the gag 40 is so positioned relative to thestarting posi- 12 that it will be engaged thereby. provi ed the gag has not been withdrawn, before the die has made a full stroke downward,

\Vhile we have shown our improvements as applied to a corner staying machine, we do not wish to be understood. as limiting ourselves to the application of the improvements to this particular type of machine, as obviously with slight modifications, they may be associated with other types ofmachines employing a reciprocating die orother member.

hat weclaim is 1. In a corner staying machine, the combination with a reciprocating die and a cooperating anvil, clutch controlled driving means for said die, guards adapted to sweep across the face ofsaid anvil during the re ciprocation of said die in advance of the downward movement thereof, means for actuating the clutch to disconnect said die from its driving means, and connections between said guards and the clutch actuator for rendering the latter inoperative when the guards pass across the anvil.

2. In a corner staying machine, the com-v bination with a reciprocating die, and a cooperating anvil, clutch controlled driving.

means for 'said die, guards adapted to sweep across the face of said anvil during the reciprocation of said die in advance of the downward movement thereof, means operated by, the movement of the die for imparting motion to said guards, a frictional slip connection forming a part of said means, means for actuating the clutch to disconnect said die from its driving means, and

connections between said frictional slip con- 110 nection'and the clutch actuator for'rendering the'l'atterinoperativewhen the guards are passed across the anvil, ,and holding said actuator in operative position when the guards encounter an obstruction.-

3. In acorner-staying machine, the combination with a' reciprocating die and c0- operating -'anv1'l having diverging faces, of

meansf for imparting a reciprocatirz movement to" the die, movable membei actuated by the die for sweeping across safdldiverging faces of the anvil, and means actuated throughthe interposition of an obstruction in the path ofmoiieni'ent of saidmovable members, or either of them, for throwing said die moving means out of act ion.

4. In acorner-staying machine, the combination with a reciprocating die and cooperating anvll, o adrlving shaft for im-,

parting reciprocatory movements to the'die, clutch-controller] driving means for a shafta movable guard .pivotally mounted to" means out of operation to stop the machine.

5. The combination with a reciprocating die and cooperating anvil, of a' driving shaft for imparting reciprocatory movements to the die, clutch-controlled driving means for the shaft, a gag cooperatively associated with said clutch-controlled driving means for throwing the latter out of operation, movable'guards adapted to sweep over. the faces of the anvil during the reciprocating movements of the die, and connections'between said" movable guards andsaid gag for operating the latter, said connections in cluding a frictionals'lip connection.

6. In a corner staying machine, the combination with areciprocating die and a cooperating anvil having diverging faces, of means for imparting reciprocatory' move ments to the die, a pair of pivoted guards positioned to sweep back and forth over the said diverging faces of the anvil, means operated by the reciprocatory movements of the die for imparting the said back and forth movements to said guards, and means actuated by the guards when either or both encounter an. obstruction for Stopping the operation of the machine. i

7. In a corner staying machine, the combination with a reciprocating die carrier carrying a die and a cooperating anvil, of.

a drive shaft for imparting reciprocatory movements to the die carrier and its die, a pulley freely mounted o n the drive shaft, :1 clutch-disk for locking the pulley to the shaft, a gag cooperatively associated with said clutch-disk, a guard movable back and forth across the face of the anvil in advance of the die, and means operated by the die carrier for positively actuating the movable guard in both directions, and for reciprocating the said gag, said means including a frictional slip connection.

8. The combination with a reciprocating die, of a driving shaft for imparting reciprocatory movements to the die, clutch- .controlled driving means for the shaft, a

gag cooperatively associated with said clutch-controlled driving means for throwing the latter out of operation, means mount,-

ed on the die and operating during the reciprocating movements thereof for actuating the gag, a guard movable in advance of the die and moved positively by said means on the" die, and connections between v witnesses.

the guard and gag for operating the latter through the interpositionof an obstruction in the pathof movement of the guard, said connections includmg a frictional slip connection.

9. In a corner staying machine the combination with a reciprocating die-carrier carrying a die, clutch-controlled driving means for the die-carrier, a pair of pivoted guards positioned for movement in advance of the die, an oscillating arm pivoted on a fixed support, means actuated by the die-carrier for oscillating the arm, a frictional slip connection between the arm and its actuating means, a gag cooperatively associated with the said clutch-controlled driving means, andconnections betweensaid gag and oscillating arm.

10. In a corner staying machine, the combination with adie-carrier and its die, a driving shaft for imparting reciprocatory movements to the die-carrier and its die,

clutch-controlled driving means for the shaft, pivotally mounted guards positioned for movement in advance of the die, an oscillating arm having independent connections with said said means including a frictional connection, a gag cooperatively associated with the clutch-controlled driving means, and operative connections between said gag and oscillating arm. i

11, In a corner-staying machine the com-' bination with a reciprocating die-carrier and its die, of a shaft for imparting reciprocatory movements to the die,-carrier,clutchcontrolled driving means for the shaft, a pair of pivoted guards positioned for movement in advance of the die, a fixed stud, a sleeve free to oscillate on said stud, a rack and pinion connection between the die'ca-rrier and sleeve for. rotating the latter, an

' arm 'frictionally supported upon the sleeve,

connections between the guards and one end of the arm, a gag cooperatively associated with the clutch-controlled driving means, and operative connections between said gag and the other end of the said arm.

In testimony whereof we have hereuntoset our hands in presence of two subscribing Witnesses:

C. E. SGHAEFFER, J. L. Connoe.

RICHARD HOLBECHE. Witnesses:

ROBERT LEAF, KATHLEEN W. THoMPsoN.-

ERNEST L. HDAZEL.

' ards, means operated by the die-carrier for oscillating the arm,

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