US3276711A

US3276711A - Unwind stand for web rolls

Info

Publication number: US3276711A
Application number: US339623A
Authority: US
Inventors: Merrill D Martin
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-01-23
Filing date: 1964-01-23
Publication date: 1966-10-04
Anticipated expiration: 1983-10-04
Also published as: GB1019106A; DE1474238B2; DE1474238A1

Description

Oct. 4, 1966 M. D. MARTxN UNWIND STAND FOR WEB ROLLS 7 Sheets-Sheet 1 Filed Jan. 25, 1964 -N -mwrwll d 2x Y6 KMK/w @w INVENTOR MEHR/LL D. MART/N BY ATTORNEY Oct. 4, 1966 M. D. MARTIN UNWIND STAND FOR WEB ROLLS '7 Sheets-Sheet 2 Filed Jan. 23, 1964 TTR/VEY Oct. 4, 1966 M. D. MARTIN 3,276,711

UNWIND STAND FOR WEB ROLLS Filed Jan. 23, 1964 7 Sheets-Sheet 5 INVENTOR. MEHR/LL D- MARTI/V Oct. 4, 1966 M. D. MARTIN UNWIND STAND FOR WEB ROLLS Filed Jan. 25,v 1964 7 Sheets-Sheet s INVENTOR. MEHR/L1'. D. MARTI/V A 7' TURA/EY Oct. 4, 1966 M. D. MARTIN UNWIND STAND FOR WEB ROLLS 7 Sheets-Sheet 5 ATTORNEY Filed Jan. 25, 1964 7 Sheets-Sheet 6 M. D. MARTIN Oct. 4, 1966 UNWIND STAND FOR WEB ROLLS Filed Jan. 23, w64

Gct- 4, 1966 M; D. MAR-rm 3,276,7u

UNWIND STAND FOR WEB ROLLS Filed Jan. 25, 1964 '7 Sheets-Sheet '7 INVENTOR.

2729.17 y MEHR/LL 0. MART/N www ATTORNEY United States Patent O 3,276,711 UN WIND STAND FOR WEB ROLLS Merrill D. Martin, 1250 67th St., Emeryville, Calif. Filed Jan. 23, 1964, Ser. No. 339,623 14 Claims. (Cl. 242-58.@

This invention relates to an unwind stand for web rolls.

The purpose of such an unwind stand is to pick up a large and heavy roll of paper or the like from the floor and transfer it into a so-called corrugator combiner or processing machine where the -unwind stand positions and holds the roll so as to maintain tension and alignment of the web fed from the roll `of paper into the combiner.

In previous practice an overhead crane or lift truck carried the roll of paper and loaded it on a stand which was moved into the corrugator combiner or in some instances was permanently fixed in position on the c-orrugator combiner. These previous methods were awkward, cumbersome and expensive because there was no flexible travelling combined self loading stands which travels to the combiner and can be accurately aligned with the combiner for feeding the web from the roll of paper into the combiner.

A feature of the present invention is that an unwind stand is provided which is self-propelled and can be moved along a combiner or processing machine or along an entire battery of such machines by a single operator and which is capable of quick, easy and accurate adjustments for feeding the web from a roll of paper into the combiner.

Another feature of this invention is the pro-vision of coordinated self loading means between which roll of paper can be rolled and which can be clamped over the roll and then can lift that heavy roll of paper into the proper position in such a manner that the reaction forces are always exerted upon the wheels of the carriage of the unwind stand.

Another feature of this invention is the flexibility of control from a cab by one operator for the positioning of the carriage relatively to a heavy roll of paper and then for the operation of the lifting arms relatively to the roll so as to lower the arms to align them with the spool of the roll and then clam-ping the journal clamps or chucks into the ends of thespool and then raising the arms with the heavy roll of paper Off the ground and in alignment with the carriage to be carried by the carriage into registering position with the combiner.

Another feature of the invention is to provide a simple and flexible control for the carriage with adjustable arms which can be raised or lowered for clamping and raising a heavy roll of paper off the ground and into the carriage and which then can be accurately aligned by easy control with the combiner or processing machine for feeding the web from the roll of paper under hydraulically controlled tension; all the power for all operationsis provided through hydraulic means generated by a single motor, said hydraulic means being operable from a single control panel on the carriage convenient to the operator; and said valve control for the hydraulic operating means permitting optionally automatically to align or register the position of the carriage so as to assure accurate alignment of the roll of paper with the combiner.

I am aware that some changes may be made in the general arrangements and combinations of the several devices and parts, as well as in the details of the construction thereof Without departing from the scope of the present invention as set for-th in the following specification, and as defined in the following claims; hence I do not limit my inven-tion to the exact -arrangements and combinations of the said device and parts as described in the said specification, nor do I conne myself to the exact 3,276,711 Patented Oct. 4, 1966 Mice details of the construction of the said parts as illustrated in the accompanying drawings.

With the foregoing and other objects in view, which will be made manifest in the following detailed description, reference is had to the accompanying drawing-s f-or the illustrative embodiment of the invention, wherein:

FIG. 1 is a side elevation of the preferred f-orm of the unwind stand.

FIG. 2 is a top plan view of the preferred form of the unwind stand.

FIG. 3 is a partly sectional plan view of the unwind stand.

FIG. 4 is a cross-sectional view of the cab of the unwind stand.

FIG. 5 is a cross-sectional view of the unwind stand, the section being taken on the lines 5 5 of FIG. 1, the web roll and the cab being indicated in broken lines.

FIG. 6 is a cross-sectional view on about line 5-5 of FIG. 1 showing the loading arm in lowered position.

FIG. 7 is an enlarged front elevation of the web tensioning device mounted on the loading arm shown partly in section.

FIG. 8 is a cross-sectional View of the web tensioning device on the loading arm, the section being taken on line 8 8 of FIG. 7.

FIG. 9 is a bottom plan view of the web tensioning device.

FIG. 10 is a cross-sectional view of the pilot check valve interposed in the hydraulic line leading to the lifting jack of one of the loading arms.

FIG. l1 is a piping and wiring diagram showing the fluid connections through the reversible control valves to the respective operating devices of the roll stand, and also showing the electrically operated reversible control valve and a diagram of its circuit control.

FIG. 12 is a diagrammatic view of the connections of the hydraulic piston and cylinder of the tensioning device.

FIG. 13 is a top plan view of a modified form of the roll stand.

FIG. 14 is a sectional view of the modified form, the section being taken on lines 14--14 of FIG. 13.

FIG. 15 is a fragmental partly sectional plan view of the connection of the travel nut and the screw shaft in the modified form.

FIG. 16 is a perspective view of the modified form of the web roll from the side of the adjustable hase.

FIG. 17 is a fragmental sectional rear view of the back frame of the modified form, the section being taken substantially through lines 17-17 of FIG. 18.

FIG. 18 is a cross-sectional fragmental view of the modified form showing the mounting of the loading arm on a bearing on the adjustable back plate.

In its general organization the lift-11p roll stand includes a carriage 1 on which are pivoted spaced loading arms 2, movable relatively to one :another `and adjustable longitudinally of the carriage by .an -adjusting mechanism 3. On each loading arm 2 there is ia tension control device 4; the raising and lowering of the loading arms 2, lthe control of the tension 4, the operation of the longitudinal :adjusting mechanism 3, .and the propelling of the carri-age 1, are .all controlled by an hydraulic mechanism 6 through `suitable valve control 7 and an electric switch control 8.

The carriage The carriage 1 includes a cab 11 with a suitable platform 12`extended in front of the cab 11. The operator can stand on the platform 12 while manipulating the respective controls for the oper-ation of the device and thus can travel with the carriage to pick up the roll of paper and to carry it to the combining or processing machine and hold it there in suitable position. From the cab 11 extends oppositely to the platform a base 13 on which one of the loading arms 2 is journalled in a manner to be hereinafter described. The cab 11 has a transverse drive shaft 14 journalled in its lower portion. A wheel 16 is fixed on each end of the drive shaft 14 so that when the drive shaft 14 is rotated the wheels 16 function as traction wheels. A flange 17 extends from a bottom part of theI carriage to the underside of each adjacent liange of each rail 19. Thus the cab 11 when driven is positively guided on the rails 19 and is held against tipping or derailing in any direction and also against movement away from the rails 19.

An adjustable base 21 is spaced along the rails 19 from the cab 11 and its base 13. The adjustable base 21 has wheels 22 journalled thereon to ride lon the rails 19. The spacing between the

bases

13 and 21 accommodates a roll of paper. Each

base

13 and 21 has a bearing bracket 23 extended from an end thereof. Each bracket 23 in this illustration consists of fa pair of parallel plates spaced from each other with a journal ring 24 fixed on each plate. The journal rings 24 of all the plates of both brackets 23 are in horizontal axial alignment.

A tubular shaft 26 extends through `the journal rings 24, and the respective loading arms 2 are mounted on the tubular shaft 26 between the respective pairs of plates of the respective brackets 23.

Another tubular shaft 20 extends concentrically through the -outer tubular shaft 26. The inner tubular shaft 20 is of smaller diameter than the outer tubular shaft 26 and has an annular liange 25 at each end 4thereof substantially corresponding to the inner diameter of the outer tubular shaft 26. On each annular flange 25 is fixed a moun-ting plate 30. The mounting plate 30 on the inside of the cab 11 is suitably mounted to an adjacent wall of the cab 11 so as to hold the tubular shaft 20 against rotation.

Loading arms Each loading arm 2 is formed in a firmly welded box structure. Side plates 27 land 28 `are connected by transverse side plates 29 and at least lone end plate 31. The side plates 27 are on the side of each loading arm 2 facing the other loading arm 2 and will be hereinafter referred to as inner side plates 27. The side plates 28 will be hereinafter referred to as outer side plates 28. The

side plates

27 and 28 have aligned holes 32 therein in each of which is provided a bushing 33, which bushing 33 lits -on the -outer'periphery of the tubular shaft 26. Each bushing 33 is suitably fixed to the respective side plates. In the present illustration a flange 34 of the bushing 33 is bolted to the adjacent outer side plate 28. Each bushing 33 has a key 36 on its inner periphery extended into a slot 37 in the outer periphery of the tubular shaft 26 so that when the loading arms 2 are raised or lowered they must move in synchronism. The tubular shaft 26 performs the double function of a journal and also of a synchronizing element for the movement of the loading arms 2. On each loading arm 2 there is supported a trunnion 38, the cross arms 39 of which are journalled on stub shafts 40 fixed in the respective inner and

outer side plates

27 and 28. Each trunnion 38 is fixed to or pressed on an hydraulic cylinder 41. A piston 42 works in the hydraulic cylinder 41 and its piston rod 43 extends t-o and is suitably pivoted on the

respective carriage base

13 or 21 so that the hydraulic cylinder 41 can suitably change its angle as'it lifts or lowers the respective loading arm 2 about the axis of the tubular shaft 26.

The chuck or clamping mechanism On the outer or free end of each loading arm 2 is formed an extension box 46. The inner side 47 of the extension box 46 is in extension of the inner side plate 27. A conical chuck spindle 48 has 1a spindle shaft 49 which is journalled in the inner side 47. Each conical chuck 48 terminates in an entrance tip 51 to facilitate the entry of the respective chuck into the respective ends of the hollow spool 52 of a roll of paper 53. The respective conical chucks 48 are in axial alignment.

The slot 37 of the tubular `shaft 26 :adjacent the travelling loading arm 2 is elongated s-o that the key 36 of the travelling loading arm 2 remains in engagement with and keyed to the tubular shaft 26 during the longitudinal adjustments of said travelling loading arm 2.

Loading arm adjusting mechanism The distance between the loading arms is varied or adjusted by means of a screw `shaft 56. A bracket 57 extends from the inner side plate 27 of the travelling loading larm 2 beyond the bushing 33 and beyond the tubular shaft 26. On this extension bracket 57 is fixed a travelling nut 58 which is threadedly engaged with the screw shaft 56 so that when the screw shaft 56 is turned in one direction or in the other the travelling nut 58 travels in the respective opposite directions and thus moves the adjustable loading ann 2 along the shaft 26. The travelling base 21 rolls on its idling wheels 22 so as `to provide balanced support in all adjusted positions of the travelling loading arm 2.

A journal bracket 59 is fixedly extended from the inner side plate 27 of the fixed loading arm 2 and journals and anchors the flanged end 61 of the screw shaft 56. A suitable hydraulic motor 62 is supported on a bracket 63 in extension of the outer side plate 28 of the fixed loading arm 2.

The operation of the hydraulic mot-or 62 is controlled by vthe control valve mechanism 7 so as to shift the travelling loading arm 2 and the travelling base 21 away from the cab 11 so as to allow the register-ing of the conical chucks 48 outside of and with the axis of -the spool 52. Then by reversing the hydraulic motor 62 the travelling nut 58 pulls the travelling loading -arm 2 and travelling base 21 toward the cab 11 and pulls the chuck 48 into the spool 52. The chuck 48 of the loading arm 2 on the cab base 13 is moved into an end of the spool 52 by driving the cab 11 toward the `r-oll of paper 53 between the arms 2. Then by tightly pulling the chuck 48 of the travelling arm 2 into the other end of the spool 52, the roll 53 is tightly clamped between the arms 2.

The tension brake The spindle shaft 49 of each chuck 48 extends through and beyond the other -side of the box 46. As shown in FIGS. 7 and 8 the extended end of the spindle shaft 49 is secured into the hub 66 of a brake dru-m 67.

A suitable key 68 inside of the hub 66 engages a groove 69 in the spindle shaft 49. A bearing plate 71 bears against the outer end of each hub 66 and is held in place by a suitable bolt 72 screwed into the adjacent end of the spindle shaft 49. The portion of the spindle shaft 49 fitting into the hub 66 is of reduced diameter -so as to confine the hub 66 against axial movement.

On the outside of the brake drum 67 :are a pair of

brake shoes

73 and 74. Each

brake shoe

73 and 74 is substantially semi-cylindrical so that the brake shoes complement each other to surround lthe brake drum 67. The brake shoes are supported on a pivot pin 76 which latter in turn is secured on a bracket plate 77 suitably secured such as by bolting in an extension of the outer wall of the box 46.

The free end of the brake shoe 73 is forked so as to accommodate the end of the other shoe 74 therebetween. Both tines 78 of the forked end of the brake shoe 73 are secured by suitable bolts 79 to a top flange 81 of an hydraulic cylinder 82. From the lower end of the brake shoe 74 extend downwardly a pair of spaced ears 83 which straddle a head 84 on the end of a piston rod 85 which latter works with a piston 86 in the hydraulic cylinder 82. Both brake shoes 73 :and 74 are provided with suitable brake lining 87 to be pressed against the periphery of the brake drum 67.

A coil spring 88 is anchored at one end on an ear 89 on the cylinder 82 and at its other end on the end of a pivot pin 90 which extends through the ears 83 and the head 84.

It is a feature of these brakes that, in order to apply the brakes to the brake drum, instead of pulling the ends of the brake shoes together the ends of the brake shoes are pushed apart, thereby allowing more ilexibilty and better control of the desired tension on the respective drums 67, which tension in turn is so regulated as to result in a continuous even pulling of the web from the paper roll yet prevent the paper roll to accelerate by its own inertia and thereby to loosen or tangle or otherwise give an irregular shape to the web as it is being unrolled. The spinning of the paper roll by its own inertia is prevented by these brakes which are very flexibly adjustable to exactly the proper tension. The location of the hydraulic cylinder 82 below the

shoes

73 and 74 prevents leaking of fluid into the brake shoes.

The hydraulic mechanisms As shown in FIG. 4 the main control for the hydraulic mechanisms is located in the cab 11 of the carriage. The cab 11 is a box in which on a shelf is suitably mounted an electric motor 91 which drives a suitable hydraulic pump 92 from which extend suitable conduits as particularly shown in the diagrams on FIGS. 11 and l2.

An hydraulic travel motor 93 is also suitably mounted in the cab 11 and its shaft is connected by means of a sprocket and chain tran-smission 94 to the drive .shaft 14 for driving the traction wheels 16,

A reversible control valve 96 controls the flow to the travel motor 93. A second reversible control valve 97 controls the ow to the hydraulic motor 62 for driving the clamping screw lshaft 56. A third reversible control valve 98 controls the ow to the hydraulic cylinders 41 for raising the respective loading arms 2. Each of the

reversible control valves

96, 97 and 98 is provided with a suitable button or handle 99 projecting above the top plate 100 of the cab 11. These reversible valves are enclosed in a box 101 suitably mounted on the underside of the top plate 100 las shown in FIG. 4.

In the conduit system of the hydraulic cylinders 41 for the raising of the loading arms 2, there are .provided certain safety devices to prevent the accidental dropping of the loading arms 2 in the event the hydraulic pressure in the system fails. As shown in FIG. l1, in the conduit 102, leading from the third reversible control valve 98, there i-s interconnected a so-called pilot check valve 103. This pilot check valve is a standard type to lock the cylinders 41 in raised position, namely so as to allow ilow through the conduit 102 to the cylinders 41 but block reverse llow until pressure is again applied to the pilot port of the check valve 103. A somewhat diagrammatic view of this pilot check valve is shown in FIG. l0. The conduit 102 is connected to the intake of the pilot check valve so that the hydraulic fluid under pressure pushes the ball check 104 oft" the valve seat 106 and the ow then continues out through the outlet 107 to the cylinders 41. If the hydraulic pressure in the line 102 breaks down accidentally, the spring 108 presses the ball check 104 on its valve seat 106 `and holds the fluid pressure in the cylinders 41.

When the third control valve 98 is reversed so as to conduct luid under pressure through the pilot conduit 109, then the pressure entering through the pilot port 111 moves a piston 112 in the pilot check valve so that a finger 113 on the piston pushes the ball check 104 off its seat 106 and allows the uid from the cylinders 41 to flow -out through the conduit 102 and through the valve 98 to a bypass conduit 114 and to the reservoir 116.

Another safety device is interposed in one of the delivery conduits 117 leading to one of the cylinders 41 and this is a so-called Watchman Vel-ocity Fuse 118 to protect against damage to the equipment or injury to personnel and loss of hydraulic fluid in case of lluid line or component failure. When iluid velocity exceeds the calibrated rate of the fuse valve, the latter snaps shut automatically and holds the remaining fluid in the cylinder 41 thereby prevents the lowering of the loading arms 2. The Waterman Velocity Fuse is so selected that the shut-0E velocity for which the fuse is set exceeds the normal velocity of return flow from the cylinders 41 when the control valve 98 is reversed for the normal lowering of the loading arms 2. If by accident the line 117 between the pilot check valve 103 and the cylinders 41 should break, then the sudden release of the hydraulic fluid would produce the velocity for snapping the Waterman Velocity Fuse shut.

The overall conduit system, as illustrated in FIG. 11 starts With a conduit 119 leading from the reservoir 116 through a lter 121 into the pump 92. Then another conduit 122 leads from the pump 92 through a variable orifice pressure compensated by-pass llow control 123 and through a conduit 124 to an automatic reversible control valve 126. This automatic reversing control valve 126 is of the same construction as the previously mentioned reversible control valves except that instead of a button or handle control this valve is operated by a pair of solenoids 127. These solenoids 127 are connected in `a suitable electric circuit 128 actuated by photosensitive devices such as electronic eyes y129 aligned with the respective elemen-ts or parts of a processing machine so as to automatically actuate alternate switches 130 to operate the travel motor 93 in opposite directions for aligning the carriage and the roll of paper thereon properly -with the processing machine. Instead of the so-called electric eye devices remote control may be used by the operator for alternately operating the switches 130 as the operator observes the alignment from a suitable distance. In the neutral position of the automatic control valve 126 the line 124 is in communication with a by-pass line 131 which latter connects to a by-pass line 132 leading from the flow control 123 and to the first manual reversible control valve 96. The respective outlets of the automatic reversible control valve 126 are connected through conduits 133 to the respective outlet conduits 134 of the rst reversible control valve 96, which latter conduits 134 lead to the opposite sides of the travel motor 93. When the automatic control valve 126 is utilized for aligning the carriage, then the first reversible control valve 96 is held in neutral position as shown in the diagram in FIG. 11 and vice versa.

During manual control when the first reversible control valve 96 is shifted to the left viewing FIG. 11, the flow under pressure from conduit 132 is connected to the left hand conduit 134 and after passing through the travel motor 93 the flow is returned through the right hand conduit 134 and through valve 96 to another by-pass conduit 136. Thus the travel motor 93 is rotated in one direction. When the first reversible control valve 96 is reversed, namely pushed to the right for cross connection, then the flow in the delivery conduits 134 is reversed and the travel motor 93 is operated in the opposite direction, so as to move the carriage in the respective directions.

The by-pass conduit 136 leads into the second reversible control valve 97 which latter in the neutral position as shown in FIG. l1 communicates with a third by-pass conduit 137, which latter in turn leads to the third reversible control valve 9S. This third valve 98 in the neutral position communicates the by-pass conduit 137 with the by-pass conduit 114 leading back to the reservoir 116.

When the second reversible control valve 97 is turned to the left viewing FIG. l1 then the by-pass conduit 136 conveys fluid under pressure to a feed conduit 138 to the clamping motor 62 from which the luid is returned by conduit 139 through the second reversible valve conduit 97 to the by-pass conduit 137. Thus the clamping motor 62 is operated for rotating the screw shaft 56 in a direction to pull the loading arms together for clamping the roll of paper between the arms 2. By moving the second reversible control valve 97 to the right viewing FIG. ll it reverses the lconnections in the valve so that the iluid under pressure feeds through conduit 139 to the clamping motor 62 and then out through the conduit 138 to the by-pass 137 and thus rotates the clamping motor 62 in the opposite direction for rotating the screw shaft 56 so as to move the loading arms 2 apart from one another thereby to disengage them from the spool 52 of the roll of paper 53.

When the third reversible control valve 98 is manipulated, as heretofore described, all the other reversible control valves are in neutral position so that pressure under fluid is delivered through the by-pass conduit 137 to the third reversible control valve 98 for raising or lowering the loading arms 2 by manipulating said third reversible control valve 98 in opposite directions respectively.

The first by-pass line 132 leading to the rst reversible control valve 96 as well as the lines 134 connected to the travel motor 93 are provided with suitable preset bypass valves 141. The by-pass valves 141 are resiliently yieldable above a preset pressure so that any sudden stop* ping of the carriage in either direction or any other sudden surge of great increase of fluid pressure is cushioned or absorbed by the respective resilient by-pass valves 141.

The hydraulic system for the brake cylinders 82, as shown in FIG. l2, includes the usual master cylinder 142 operated by a manipulating lever 143 in `the customary manner as a brake so that when the piston 144 shown in FIG. 12 is pressed by the brake lever 143 into the cylinder 142 it will apply brake pressure to the brake pistons 86 in the respective cylinders 82 and correspondingly applies the brake shoes to the spindle shafts 49 in the manner heretofore described.

The moded form The modified form of the roll stand, shown in FIGS.

13 to 18, differs from the first form in the provision of a hollow back frame 146 extending from a side of the cab 11 along the entire length of the machine. The adjustable base 147 in this form is supported on a slide bracket 148 which bracket has a slide plate 149 provided with grooved bosses 151 at its top and bottom riding on guide ribs 152 extended longitudinally along and inside of the hollow back frame 146. A travel nut 153 extends from the slide plate 149 and is engaged by a screw shaft 154 journalled in the opposite ends of the back frame 146 between and parallel with the guide ribs 152. A fluid motor 156 located in the box of the cab 11, as shown in FIG. 13, and manipulated through the second reversible control valve 97 in the manner heretofore described, rotates the screw shaft 154. In this form the loading arms 2 are free of the screw shaft and of the hydraulic clamping motor, but are connected together by a shaft 157 which is slidably journalled in bearing brackets 155 on the slide plate 149, and in suitable bearings on the fixed base on the cab 11.

Electrical connections On the mounting plate 30 at the end of the inner tubular shaft 'beyond the adjustable base 21 is mounted a reel bracket 153 on which is a suitable reel 159 for holding an electric cable 161, which cable extends through the inner ltubular shaft 2t) to the cab 11 and to the electric motor 92. The reel 159 is the usual spring reel so as to facilitate the paying out or reeling up of the cable 161 as the carriage travels. In the modified form the mounting plate 162 for supporting the reel is mounted on the free end of the back frame 146 and the cable extends through the hollow back frame 146 into the cab 11 and to the electric motor 92.

Parallel aligner of roll with processing machine It is important that the roll of paper be parallel with the processing machine so that the web is fed into the processing machine axially of the processing machine and is not twisted or pulled at an angle. For the purpose of such alignment there is provided an adjusting device on the cab 11. The box of the cab 11 as wellas the chain 8 and sprocket transmission 94 is slidable on the shaft 14. From a bottom plate 163 of the cab 11 extends a guide 164 slidable on a guide rod 166 which latter extends parallel with and beneath the bottom plate 163 and also parallel with the drive shaft 14. On each end of the guide rod 166 is a head 167 which has a groove 16S in slidable eng-agement with the annular flange 170 of each traction wheel 16 so as to hold such guide rod 166 against transverse shifting. A bracket 169 is clamped on the guide rod 166 and projects upwardly along side a side wall of the cab 11 and has a threaded hole 171 in its upper end. A screw 172 rotatably extends through the side of the cab 11 adjacent the bracket 169 and engages the threaded hole 171. Collars 173 fixed on the screw 172 bear against the opposite faces of the adjacent side of the cab 11 so that when a suitable ratchet handle 174 attached to the outer end of the screw shaft 172 is turned it will push or pull the cab 11 relatively along the guide rod 166 and also relatively to the drive shaft 14. Inasmuch as the adjustable travelling base 21 of the carriage remains in its initial -transverse relation, the relatively slight adjustment of the cab 11 transversely is sufficient to correct any comparatively slight `deviation of the roll of paper held on the carriage from the parallel position.

Operation In operation the operator stands on the platform 12. In order to begin the operation he turns on the electric switch 8 which starts the operation of the motor 91 in the usual manner and operates the hydraulic pump 92. While the roll stand is at a standstill the fluid under pressure ows from the pump 92 through the 'by-

pass conduits

132, 136, 137 and 114 back to the reservoir 116. In order to move the carriage to the roll of paper located on the floor near the rails 19, the operator manipulates the button or handle 99 for the first reversible control valve 96 so as to move the valve right or left viewing FIG. ll, thereby to rotate the travel motor 93 in the respective directions. The travel motor 93 through the sprocket and chain transmission 94 drives the drive shaft 14 and the traction wheels 16 on the rails 19 and thus the entire carriage is moved along the rails 19 until it is substantially alongside the roll of paper 53. Then the operator stops the carriage -by releasing the handle 99 of the first reversible control valve 96. All the reversible control valves are standard spring centered. The usual centering Springs 177 are indicated on the conduit diagram on FIG. 11. Thus the manipulating handle 99 and the control valve connected to it automatically springs back to the neutral position Whenever released by the operator.

When the carriage is in substantial alignment alongside the roll of paper 53, the roll of paper is rolled into the carriage. The carriage is open on one side. The other side of the carriage facing the processing machine is obstructed in the first form by the tubular shaft 26 and in the second form by the back frame 146. The carriage is so proportioned that a full roll of paper 53, which is usually tive feet in diameter, can be rolled substantially against the tubular shaft 26 and in that position the center of the spool 52 is a few inches off the center of the machine or from the top position of the chucks 48 of the loading arms 2. The operator manipulates the lever 99 of the third control valve 98 to adjust the arms 2 to a position where the chucks 48 of the arm 2 are in registry with the center of the spool 52. Then the operator manipulates the first control valve 96 to move the carriage so as to enter the chuck 48 nearest the cab 11 into the yadjacent end of the spool 52. Then the operator manipulates the second control valve 97 so as to turn the screw shaft 56 in a direction to pull the farther arm 2 with its adjustable base 21 toward the cab 11 there-by to pull the other chuck 48 into the other end of the spool 52 tightly. Then the operator manipulates the third control valve 98 to raise the larms 2 to lift the roll of paper 53 off the oor into the operating position.

Then the operator manipulates again the first control valve 96 and carries the roll of paper 53 to the processing machine. At the processing machine either the operator manipulates the carriage back and forth into proper registry or turns the switch 176 of the electrically actuated control valve 126 for the automatic or remote control centering of the `carriage and the roll of paper 53 relatively to the processing machine. If the roll of paper 53 is not parallel with the processing machine then the operator turns the ratchet adjustment handle 174 to shift the cab 11 transversely to make the adjustment for parallel position. After the web or paper is connected to the processing machine the operator manipulates the brake handle 143 for the proper tension of the brake as heretofore described. After all the paper is unrolled from the spool 52 then the operator m-anipulates the third control valve 98 and lowers the arms 2 and then by operating the control valve 97 withdraws the chucks 48 from the spool 52 and allows the spool 52 to drop, and the device is ready to pick up another roll.

I claim:

1. In a roll stand for carrying a roll of material having a spool (a) a carriage including (b) a cab,

(c) a separate base spaced from said cab,

(d) wheels along opposite sides of said cab and of said base to support said cab and said base individually,

(e) a first swinging loading arm on said cab,

(f) a second swinging loading arm on said wheeled base,

(g) chuck means on each of the loading arms to engage opposite ends of said spool,

(h) means on said cab for raising and lowering the first swinging loading arm thereon,

(i) means on said wheeled base for raising and lowering said second swinging loading arm,

(j) a journal support journalled in said cab and in said base,

(k) said swinging loading arms being secured on said journal support for swinging in synchronism,

(l) said base and said second swinging loading arm being axially adjustable together on said journal support,

(rn) means to adjust and secure the position of said base on said journal support to selected spacing from said cab thereby to accommodate said roll between said chuck means,

(n) power means for driving the wheels on said cab,

(o) a stand for the operator on said cab,

(p) control means on said cab manipulable from said stand for controlling and operating said raising and lowering means, said adjusting means and said driving means at will.

2 The invention defined in claim 1, and

(g) means to shift the position of the cab transversely relatively to the driving wheels of the cab for parallel adjustment of the roll relatively to a processing machine.

3. The invention defined in claim 1, and

(q) each of said arm raising means including hydraulic means exerting a thrust directly against the adjacent raising arm and a reaction force within the area between said wheels thereby to distribute the load of the raised roll substantially equally between said wheels,

(r) a reversible control valve to control said hydraulic means.

4. The invention defined in cl-aim 1, and

(q) each of said arm raising means including hydraulic means exerting a thrust directly against lthe adjacent raising arm and a reaction force within the are-a between said wheels thereby to distribute the load of the raised roll substantially equally between said wheels,

(r) a reversible control valve to control said hydraulic means,

(s) a pilot safety check valve interconnected between the reversible control valve and said hydraulic means to automatically check reverse flow from the hydraulic means back to the control valve,

(t) pilot means in the check valve to open the check valve when said control valve is reversed for lowering said arms.

5. The invention defined in claim 1, and

(q) each of said arm raising means including hydraulic means exerting a thrust directly against the adjacent raising arm and a reaction force within the area between said wheels thereby to distribute lthe load of the raised roll substantially equally between said wheels,

(r) a reversible control valve to control said hydraulic means,

(s) a pilot safety check valve interconnected between the reversible control valve and the hydraulic means to automatically check reverse ow from the hydraulic means back to the valves,

(t) pilot means in the check valve to open the check valve when said control valve is reversed for lowering said arms, and

(u) a fiuid velocity controlled fuse interconnected in zthe supply line of at least one of the hydraulic means to be shut off by a velocity of flow from said hydraulic means in excess of a predetermined velocity.

6. The invention defined in claim 1 where said spacing adjusting means include (g) a screw shaft journalled longitudinally of the carriage and parallel with said journal support,

(r) and a `travelling nut travelling on said screw shaft to move said wheeled base support and the loading arm thereon together selectively toward or away from said cab respectively t0 clamp or release said roll of material.

7. The invention defined in claim 6, and

(s) said journal support being anchored in said cab against axial displacement,

(t) said travelling nut being supported on the loading arm on said wheeled base support,

(u) driving means for said screw shaft being mounted on the loading arm on said cab,

(v) said screw shaft and said driving means and said travelling nut swinging together with said arms when said arms are raised or lowered.

8. The invention defined in claim 6, and

(s) a back frame extended from said cab along the side of the carriage adjacent said journal support,

(t) a travelling bracket extended from said wheeled base support,

(u) coacting means on said travelling bracket and on said back frame to guide said travelling bracket along said back frame,

(v) said travelling nut being extended from said traveling bracket and engaging said screw shaft to ride thereon as the screw shaft is rotated,

(w) said screw shaft being journalled in said back frame,

(x) and said manipulable control means in said cab rotating said screw shaft selectively in opposite directions.

9. The invention defined in claim 1, and wherein said journal support is located offset to about above the wheel along one side of said carriage and said arms in the raised position are inclined to locate the axis of the chuck means generally in the longitudinal center plane of the carriage, and

(g) said power means including an hydraulic motor in said cab,

(r) a drive shaft driven by said hydraulic motor extended transversely of said cab,

(s) the wheels on said cab being traction wheels on v a spool,

(a) a carriage including (b) a wheeled cab,

(c) driving means for the wheels of the cab,

(d) a separate wheeled base spaced from the cab,

(e) 'a swinging loading arm on the cab and a swinging loading arm on the wheeled base,

(f) chuck means on the respective loading arms to engage the opposite ends of said spool for rotatably supporting said roll,

(g) adjusting means to move said wheeled base toward and away from said cab thereby to adjust the spacing between said loading arms respectively for clamping or releasing said roll,

(h) means for raising and lowering each of said arms,

(i) manipulable control means on the cab for controlling said driving means, said adjusting means and said means for raising and lowering said loading arms,

(j) journal means to support said arms respectively at said cab and on said wheeled base for raising and lowering said arms together,

(k) said spacing adjusting means, said means for raising and lowering said loading arms and said driving means being liuid powered,

(l) said manipulable control means including an hydraulic system comprising,

(rn) a motor driven pump,

(n) a reversible control valve for each, the driving means, the space adjusting means and the means for raising and lowering the arms,

(o) said pump being connected to said reversible control valves so that in the neutral position of said valves the fluid under pressure by-passes from one valve to the next.

12. The invention deiined in claim 11, and

(p) resiliently yieldable means to urge and hold each of said control valves in an initial neutral position.

13. In a roll stand for carrying a roll of material having a spool,

(a) a carriage including (b) a wheeled cab,

(c) driving means for the wheels of the cab,

(d) a separate wheeled based spaced from the cab,

(e) a swinging loading arm on the cab and a swinging loading arm on the wheeled base,

(h) means for raising and lowering each of said arms,

(i) manipulable control means on the cab for controlling said vdriving means, said adjusting means and said means for raising and lowering said loading arms,

(j) said chuck means including a spindle shaft journalled in each arm and being in axial alignment with the spindle shaft in the other arm,

(k) a frictional chuck on each spindle shaft insertable in opposite ends of said spool for clamping the spool and the roll between said arms,

(l) hydraulically operated brake means on each chuck spindle being secured on the respective arm,

(m) and manipulable means on said cab to control the hydraulic actuation of said brakes for determining the resistance to the rotation of said spindle shafts for the tensioning of the web unrolled from said roll.

14. The invention defined in claim 13, and

(n) each brake including a pair of complemental brake shoes,

(o) pivot means on the respective arms for pivotally suspending both shoes,

(p) the free ends of said shoes overlapping and crossing one another and being movable relatively to one another,

(q) an hydraulic 4brake cylinder supported on the free end of one of said shoes,

(r) a piston working in said cylinder,

(s) the piston rod of said cylinder being connected to the end of the other shoe whereby the pushing of the piston outwardly of said cylinder pushes the crossed ends of the shoes apart,

(t) a brake drum on said spindle within the area deiined by said shoes and being engaged by said brake shoes when the free ends of the brake shoes are pushed apart.

References Cited by the Examiner UNITED STATES PATENTS 2,405,637 8/1946 Behrens 242-586 2,490,685 12/ 1949 Greene 242-586 2,499,562 3/ 1950 Behrens 242-586 2,677,476 5/ 1954 Bebinger 242-79 X 2,714,996 8/ 1955 Stroehman 242-586 2,738,935 3/1956 Greene 242-586 2,973,914 3/ 1961 Beninger et al 242-58 3,047,249 7/ 1962 Moser et al. 242-75 .43 3,057,571 10/1962 Aaron et al 242-586 3,091,413 5/ 1963 Leithiser 242-867 3,098,623 7/ 1963 Mortier 242-865 3,122,162 2/1964 Sands 137-498 FRANK J. COHEN, Primary Examiner. MERVIN STEIN, W. BURDEN, Assistant Examiners.

Claims

1. IN A ROLL STAND FOR CARRYING A ROLL OF MATERIAL HAVING A SPOOL (A) A CARRIAGE INCLUDING (B) A CAB, (C) A SEPARATE BASE SPACED FROM SAID CAB, (D) WHEELS ALONG OPPOSITE SIDES OF SAID CAB AND OF SAID BASE TO SUPPORT SAID CAB AND SAID BASE INDIVIDUALLY, (E) A FIRST SWINGING LOADING ARM ON SAID CAB, (F) A SECOND SWINGING LOADING ARM ON SAID WHEELED BASE, (G) CHUCK MEANS ON EACH OF THE LOADING ARMS TO ENGAGE OPPOSITE ENDS OF SAID SPOOL, (H) MEANS ON SAID CAB FOR RAISING AND LOWERING THE FIRST SWINGING LOADING ARM THEREON, (I) MEANS ON SAID WHEELED BASE FOR RAISING AND LOWERING SAID SECOND SWINGING LOADING ARM, (J) A JOURNAL SUPPORT JOURNALLED IN SAID CAB AND IN SAID BASE, (K) SAID SWINGING LOADING ARMS BEING SECURED ON SAID JOURNAL SUPPORT FOR SWINGING IN SYNCHRONISM, (L) SAID BASE AND SAID SECOND SWINGING LOADING ARM BEING AXIALLY ADJUSTABLE TOGETHER ON SAID JOURNAL SUPPORT, (M) MEANS TO ADJUST AND SECURE THE POSITION OF SAID BASE ON SAID JOURNAL SUPPORT TO SELECTED SPACING FROM SAID CAB THEREBY TO ACCOMMODATE SAID ROLL BETWEEN SAID CHUCK MEANS, (N) POWER MEANS FOR DRIVING THE WHEELS ON SAID CAB, (O) A STAND FOR THE OPERATOR ON SAID CAB, (P) CONTROL MEANS ON SAID CAB MANIPULABLE FROM SAID STAND FOR CONTROLLING AND OPERATING SAID RAISING AND LOWERING MEANS, SAID ADJUSTING MEANS AND SAID DRIVING MEANS AT WILL.