US1719344A - Guard for paper-winding machines - Google Patents

Description

Z Sheets-Sheet July2,1929.

y' Invej? "for, @MQ W July 2, 1929. F. A. sun-IERLAND GUARD FOR PAPER WINDING MACHINES v Filed Deo. 5, 1927 2 Sheets-Sheet. 2

I ,fi/y. 4 l

Patented July 2, 1929.

unire STATES miam PATENT orrice.

FORREST A. SUTHERLAND, OF MILLINOGKE'I, MAINE, ASSIGNOR TO GREAT NORTHERN P APER COMEANY, OF MILLINOCKE'I, MAINE, A CORPORATION OF MAINE.

GUARD FOR PAPER-WINDING MACHINES.

Application filed December' 5, 1927.

This invention relates to machines for winding paper in. rolls wherein the roll of paper is supported on the peripheries of and is driven by a pair of driving rolls.

invention has particular reference to gaurds or screens adapted. to be located in front of the paper and winding rolls in position to prevent objects from being' caught in the nip of the rolls.

@ne of the objects of this invention is the provision of a guard or screen which can be `moved into a shielding position in front of the rolls and also into an elevated position in whichthe rolls are exposed, and rer main in either position until moved there from,` combined with an operating member, as a foot tre-adle7 and mechanism by which the screen can be moved alternately between raised and lowered positions by successive movements of the treadle inthe same direction.

Another object of the invention is the provision of a guard for paper winders which is movable between roll-shielding` and exposing positions and is adapted to remain by gravity in whichever position it may be placed, and operating mechanism therefor including atreadle or equivalent member which is arranged to move the `girard from one toward the other position each time the treadle is depressed.

A further object of the invention is generally to improve the construction and operation of guards for paper winders and operating mechanisms for said guards. l

Fig. 1 is a front view of a paper winding machine embodying the invention.

Fig.l 2 is a perspective view of the machine of Fig. 1, parts not essential to the understanding of the invention being omitted.

Fig. 3 is a detailed end view of the guard and its operating mechanism.

Fig. 4 is an enlarged detail of the construction of the guard and one of its sup` porting arms.

The winding machine with which the invention is associated includes a pair of end frames 10 having uprights 12. The frames are connected by an I-beam 14 disposed in the front thereof and support between them a pair of horizontally-disposed parallel rollers 16 and18 on which the paper roll 20 is adapted to be supported and rotated 'to wind up the paper, as is usual practice. '.lhe guard embodying this invention comprises fria i Serial No. 237,645.

a horizontal screen 22 which is substantially co-extensive with the width of the machine between said standards and has a vertical extent sui'lieient to prevent access to the rolls 16 and 18 and the paper` roll 20 when it is in normal position in front of said rolls. The screen is supported by a suitable frame which includes the bars 24 and 26 which are disposed at the ends of the screen and are extended upwardly between the uprights 12 and have rearwardly directed upper ends which overlie and are tern'iinated somewhat in the rear of a horizontal screen-supporting shaft 28 journalled in said uprights. Arms 30, Figs.` 2 and 4, are fixed to the rear ends of said bars 24 and 26 and have their lower ends refie'xed to partially encircle said shaft and are clampedthereto by yolres 32 and bolts 34 which pass through said yolres and arms.

In the normal working position of the guard, the lower edge thereof rests upon the beam 14 andthe arms 30 are inclined upwardly and rearwardly from said shaft 26 as indicatedniost clearly in Figs. 3 and 4. The weight of the guard is to some extent but not entirely counterbalanced by weights 36 which are adjustaloly screw threaded on brackets 38 fixedto said arms 30 by the aforesaid bolts 34 and are extended rearwardly of said shaft somewhat below said arms and are also inclined upwardly and rearwardly. The guard is adapted to be raised by the rotation of said shaft 28 from the position shown in Figs. 2 and 3 into a position wherein the center of mass of the guard is entirely tothe right of the shaft 28 in which position it will be maintained by the engagement of the free ends of the arms 30 with a stop member as an angle beam 40 which is carried by theuprights 12 of the frame below and in proximity to the shaft 28 as indicated in dotted lines Fig. 3.

The guard' is adapted to be alternately raised and lowered by successive depressions of a foot treadle 42 which is pivoted at 44- to one of the end frames 10 of the machine and has its treadle portion located at the front of the frame beneath the beam 14. A rod 46 is pivotally connected at its lower end 48 with an intermediate part of said treadle and extends vertically upward beneath one of said arms 30 and has divergent front and rear ends 50 and 52 respectively. Flexible cables 54 and 56 are connected rethe front cable 54 is slack.

spectivel-y with said divergent ends and extend upwardly and have connections l58 and 60 respectively which are screw threaded on the bolts 34 and thus are ,located on opposite sides of the shaft 28 so that a pull on one cable tends to rotate the shaft in one direction and a pull on the other cable tends to rotate the shaft in the opposite direction. Turn buckles 62 and 64 are interposed in said cables intermediate their ends to adjust the respective lengths thereof.

The operation of the device is essentially as follows; When the guard is in operative position as illustrated in Fig. 2 and the treadle is up, the rear cable 56 is taut while When the treadle 42 is depressed it pulls down the arm 30 and rotates the shaft 28 in a clockwise direction, Figs. 2 and 3, thereby raising the guard; and the extent of movement of the treadle is adapted to be sufficient to move theiguard upwardlyA and rearwardly until the center of gravity of the guard passes to the right of the vertical line through the shaft 2,8. The guard then moves further in the same direction by gravity, independent of thecable, thus transferring the weight ofi-the guard from the rear cable 56 to the front cable '54. 'When the treadle is released, the guard moves further in the same direction and comes up against and 1s held by the stop beam 40 and the front cable 54 is now taut and the rear cable 5Gis now slack. When the guard isto be lowered the treadle 42 is vagain depressed. This places the front cable 54 in tension and causes the shaft 28 to be rotated in a counterclockwise direction, thus moving the guard forwardly until the center of gravity is in front. of the shaft 28 whereupon the weight of the guard is transferred from the front to the rear cable. yRaising the treadle then serves to let the guard drop by its weight onto the I-beam 14.

The turn buckles 62 and 6 4 serve to adjust the length of the respective cables so that the weight of the guard can pass from one cable to the other without any great amount .of free movement.

I claim: Y

-1. A paper winding machine having winding rolls, in combination with a guard normally disposed in front of said rolls and adapted to be elevated away from such position, an operating member for raising and lowering said guard, and operating mechanism connecting said operating member and guard 'effective to move said guard alternately between raised and lowered positions upon successive movements of said operating member in the same direction.

2. A paperwinding machine having winding rolls, a guard normally disposed in lowered position in front of said rolls and adapt-- ed to be elevated above said rolls and to be maintained by gravity in any one of said positions, a treadle for both raising and lowering said guard, and operating mechanism connecting said treadle and guard operative to move said guard out of either of its two positions on successive depressions of said treadle.

3. A paper winding machine having winding rolls, a pivotally supported guard movable between a normal low position in front of said rolls and an elevated position, an operating treadle for said guard, and lost motion connections between said treadle and said guard disposed on opposite sides ol its pivotal axis.

4. A paper winding machine having winding rolls, a pivotally supported guard movable between a normal low position in front of said rolls and an elevated position, an operating treadle for said guard, and an operative connection between said treadle and said guard including a pair ol flexible cables connected with said treadle and with said guard on opposite sides of its pivotal axis.

5. A paper winding machine having winding rolls, a pivotally supported guard movable between a normal low position in front of said rolls and an elevated position, an eperating treadle for said guard, an operative connection between said treadle and said guard including a pair of flexible cables connected with said treadle and with said guard on opposite sides of its pivotal axis, and means to adjust the lengths of each flexible cable independently of the other.

6. A winding machine having winding rolls, a pivotally supported guard movable from a normal low position in front of said rolls to an elevated position and adapted to remain by gravity in any one ot said positions, a treadle adapted to be depressed to raise and also to lower said guard, and operating mechanism connecting said treadle and said guard arranged to shift the ciiective connection between said treadle and guard from one to the other side of the pivot-al axis'Qf said guard in accordance with the position thereof.

7. A winding machine having winding rolls, a pivotally supported guard movable from a normal low position in front of said rolls to an elevated position and adapted to remain by gravity in any one of said positions, a treadle adapted to be depressed to raise and also to lower said guard, and operating mechanism connecting said treadle with said guard arranged to shift the citeetive connection between said treadle and guard from one to the other side of the pivotalaxis of said guard in accordance with the position thereof, said mechanism including a pair of flexible cables connected with said treadle and with said guard on opposite sides of its pivotal axis, said cables adapt-ed alternately to tansmit movement between said treadle and guard in raising and lowering it. l

8. A winding machine having winding rolls, a guard movable from a normal low position in front of said rolls to an elevated position and adapted to be maintained by gravityin any one of said positions, said guard having al pair of supporting bars extended upwardly and rearwardly thereabove, a horizontally disposed rotatable shaft lo cated beneath the rear ends of said bars, and having rearwardly and upwardly ei:- tended arms fixed to said bars, a treadle for raising and also for lowering said guard, and a pair of flexible cables connected with said treadle and with one of said arms on opposite sides of said shaft.

9. A winding machine having winding rolls, a guard movable from a normal low position in front of said rolls to an elevated position and adapted to be maintained by gravity in any one of said positions, said guard having a pair of supporting bars extended upwardly7 and rearwardly thereabove, a horizontally disposed rotatable shaft lo cated beneath the rear ends of said bars and fixed thereto, a treadle for raising and also for lowering said guard; and a pair of flexible cables vconnected with said 'treadle and with said shaft on opposite sides thereof.

l0. A winding machine having winding rolls, a guard movable from a normal low position in front of said rolls to an elevated position and adapted to be retained by gravity in any one of said positions, a rotatable shaft supporting said guard, an arm fixed to said shaft and extended in opposite directions therebeyond and inclined up wardly and rearwardly when the guard is in its normal low position, a normally elevated treadle for raising and also for lowering said guard, and a pair of flexible cables connected with said treadle and with said inclined arm on opposite sides of said shaft.4

ll. A winding .machine having winding rolls, a guard movable from a normal low position in front of said rolls to an elevated position and adapted to be retained by gravity in any one .of said positions, a` rotatable shaft supporting said guard, an arm fixed to said shaft and extended in opposite directions therebeyond and inclined upwardly and rearwardly when the guard is in its normal low position, a treadle for raising and also for lowering said guard, and a pair of flexible cables connected with said treadle and with said inclined arm on opposite sides of said shaft, said cables having means interposed between the ends thereof to vary the effective lengths thereof.

12. A winding machine having winding rolls, a guard movable from a normal low position in front of said rolls to anelevated position and adapted to be retained by gravity in any one of said positions, a rotatable shaft supporting said guaixl, an arm lined to said shaft and extended in opposite directions therebeyiond and inclined upwardly and forwardly when the guard is in its non mal low position, a treadle for raising and also for lowering said guard, a rod having a connection at its lower end with said t-readle and having divergent front and rear upper ends located beneath said rotatable shaft and said arm, and a pair of flexible cables connected with said front and rear upper ends of said rod and also respectively with the front and rear ends of said arm on opposite sides of said shaft, said flexible cables having means interposed between the ends thereof to adjust the effective lengths thereof.

ln testimony whereof, l have signed my name to this specification-` FORREST A. SUTHERLAND.

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