DE2146699A1 - Frame for paper rolls or the like - Google Patents

Description

Patent attorneys

Dr. Ing.H. Negfndenk

Dipi. Ing.H. HsuHc Dip !. Php. VV. S; \ r.; Ite

Massoii Scott 'ihrissell'"°°
Engineering Linitcu

Masson Scott V.'orks, "i ve rs ide Poad, September 16, 1971

Summerstown, London, S. ^T .. '. 1 7, England Attorney's File: -1753

Frame for paper roll.) Or the like

The iirfindun relates to a frame for 1-rolls, for example paper rolls, which represent M la = trolls for systems, such as strip cutting machines for parry, cutting machines or the like. These rolls are usually stranded with a hollow core and two rotatable! held .eilen, which are provided with a clamping device, which are inserted into the ends of the core, and then effect a clamping of the inner side of the core. Typically, a brake provided to the I'vellenWirkt, w maintain a constant tension on the web when it is peeled from the roll.

! »He inner diameter of the hollow core can vary so that, if a new one is held with a different core measurement If the clamping devices have to be replaced by smaller or larger ones, this can result in both the shafts as well as the jigs, if these with

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the l.ellen are formed in one piece, must be exchanged, which requires a time consuming activity.

The object of the invention is to provide this? Assistance to be removed.

The object of the invention is for a frame for paper rolls, which have a hollow core, solved in that two axially from ^ ericiitetc rotatably mounted shafts are provided, whose opposing lines detachable clamping devices iial-

ψ ton that the waves axially towards each other; are coronet so that the clamping devices can be inserted into opposite ends of the core which, axially aligned with the shafts, is arranged between the clamping devices, since the clamping devices have a plurality of movable jaws, each of which has a surface that can be brought into engagement with the core has that for insertion into the ends of the core, the F-acken are designed so that the surfaces are in Kegel.form a -.,; eorunet, and that an actuator is provided which the

^ Jaws spread apart and the surfaces in a cylindrical shape engages the core.

In a preferred embodiment of the invention it is provided that the jaws of each jig take the form of segments which are loosely held in recesses formed in an end face of one of two housings, and that the other ends of the jaws are releasably connected to the opposite ends of the shafts. For this purpose are the segments (seen in the direction in which the jigs

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in ucii nucleus !.), with an ivch backwards sicli extending '. ledge provided, its movement and sop.it the each the Seri.eate in Zusai.mieiiviirkiuig with the actuator duich a plate is prevented from being attached to the end face of each Housing ucfosti t i:; t.

; ic detachable connections between the housings and the I-cells
best:. preferably in the form of spring-loaded bolts, which,
when depressed, allow the housings, including the plates and segments, to be removed axially from the blades. On the other hand, there are various housings and plates that are capable of holding the se ·; cute with various abrasions can be pushed axially onto di./ '.,' rushes to ensure that a core with a: - smaller or larger diameter can be clamped.

Line preferred embodiment of the invention vi ->'C> as an example described in more detail below with reference to drawings.

Fig. 1 is a view showing a ^r schabatisch ollengcstells
ge ^v 'according to the present i'.rfij'Jun';

i ^. 2 shows an enlarged section through the left half the arrangement of Figure 1;

Fig. 3 shows a detail from Fir. 2, v; obei some parts
shown in modified positions;

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FIG. 4 shows a section through the arrangement according to FIG. 3 along the line IV-IV;

FIG. 5 shows a view of the arrangement according to FIG. 4 in the direction of arrow V.

In Fig. 4 a paper roll 1, which has a hollow core 2, rotatably held by two clamping parts 3, 3a, which are carried by uprights 4, 4a and in opposite ends of the Core 2 are inserted and the inner surface of the core, as will be described in detail later, clamp. the Stands 4, 4a are arranged on slides, not shown, so that the clamping parts 3, 3a face each other in an axially aligned manner, the uprights being movable towards or away from one another along the carriage by means of any of the known ones Ilittel.

Thus, the clamping parts 3, 3a can be inserted into the ends of the core 2, the roller 1 in a position in the 'litte) between the uprights 4, moves 4a, i \ ^T obei the core 2 is approximately axially with the parts. 3 , 3a is aligned. The stands 4, 4a are then moved towards one another until the ends of the core 2 rest on shoulders 5, 5a which prevent further movement of the stands.

In the following, FIGS. 2, 3, 4 and 5 referred to, the details of the left part of the arrangement according to Fi,. 1, i.e. the clamping part 3, the manner in which it is held

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is and the actuators. It turns out that the the other part of Fig. 1 is identical to the part shown in Figs. 2, 3, 4 and 5, so that it is no longer described further,

The clamping part 3 consists of three segments 6, which, xtfie later will be described, at the right end (as can be seen in Fig. 2), a hollow shaft 7 are attached, which are rotatably mounted in bearings 8 is, with the bearings from the upper end of the stand 4 received which is formed with two extensions 9 and wherein one bearing 8 is held by one of the extensions 9. A rod 10 extends longitudinally through the middle of the hollow shaft 7 and has at its right end (as can be seen in Fig. 2) a 'nose section 11 formed on, which has a larger diameter has formed as the rest of the rod 10 and approximately frustoconical is. The rod 10 is slidably guided within the shaft 7 by means of a bush 12 attached to the right end of the shaft is, wherein the rod 10 extends from the nose part 11 to the left beyond the left end of the Ue He 7 also. The left end the rod 10 is rotatably supported in a bearing 13 carried by a piston 14 which is movable within a cylinder 15 is arranged, which (as can be seen in FIG. 2) is hit by the left extension 9 of the stand 4. At each end of the Cylinder 15, connections 16 are provided for the supply of compressed air, so that the piston 14, the rod 10 and thus the nose section 11 can be moved towards the segments 6 or away from them.

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The right end of the hollow shaft 7 (as seen in Fir. 2) ends in a zylhdrisehen projection 17 coaxially to the bore of the Wave is. A cylindrical housing 13 that is aligned with the shaft 7 is, is provided at one end with a central cylindrical recess which fits over the projection 17 and the one holds spring-loaded plunger, which is arranged at right angles to the shaft 7 and which has a shaft 19 which has an enlarged lower end 2C possesses. A slot 21, the width of which is sufficient for the shaft 19, but not the end 20, to pass through

W is formed in the outer cylindrical surface of the projection 17 and is expanded approximately to the shape of a keyhole with dimensions such that when the parts are in the position shown in Fig. 2, the housing 18 is prevented from axially νοκ. To be withdrawn from the end of the shaft 7, since the end 20 does not pass through the slot 21. In order that the housing 13 can be grounded away from the shaft 7, the plunger is pressed down and the end 20 enters a further slot 2 2 which is dimensioned so that it allows the end 20 to pass through, at the same time the shaft 19 passes through the slot 21.

The other end of the housing 18 is provided with a central bore 23 provided, which is in communication with the recess in which the projection 17, as explained above, is received. At the other At the end of the housing 18 three flat recesses 24 are formed, which extend radially from the bore 23 and in the same Spaced around the hole (see Fig. 4). One Plate 25, which is provided with a central circular opening 26a

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is seen is attached to the front end of the Celiimses 18 so that it partially covers the recess 24. The plate 25 is designed so that the shoulder 5 is formed on the side of the plate that is fully facing away from the housing 13 "

Each segment 6 is provided nit an end piece 26, and the end pieces are pushed into the recesses 24 when the segments of the right Pro'ße are fitted before the I ^- Olie moved into position and is clamped by the chuck. 3

^T) ie segments 6 (see Fig. Corn snow. 2, 3 and 4) are formed so that they are disposed from a collapsed position (FIG. 2) in which their outer surfaces 27, which form a part of a cylinder in a conical shape , can be moved to a position (Tig x 3) in which their outer surfaces 27 are arranged to form an interrupted cylinder, the interruptions occurring because the segments are necessarily tapered longitudinally to make them a layer can take, as shown in Fig. 2. The outer surfaces 27 have longitudinal corrugations to aid in the tensioning of the core. So that the segments retain an annular shape in their position relative to one another, a tongue 28 is provided which sits in a groove 29 which is formed in the segments. The segments 6 are außerdeir with partially conical inner surfaces 30 \ ^r seen (s. Fig. 2).

The arrangement is such that when the stand 4 is attached, such as previously described, the segments 6 in their collapsed Form and in this position by the addition of the

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Nose portion 11 of the rod 10 which is in contact with the inner conical surfaces 30 of the segments 6, the spring 28 and the End pieces 26 of the segments 6 that touch the plate 25 are held.

After the movement of the stand 4 is stopped due to the contact of the shoulder 5 with the end of the core 2, compressed air becomes introduced into the cylinder 15 on the left side of the piston 14 (Fig. 2) so that the piston, rod 10 and the ^ Nose section 11 move to the right. It follows that the segments 6 spread apart v / ground, since the conical Lug 11 slides along the inner surfaces 30 until the outer surfaces 2 7 of the segments 6 in contact with the inner Surface of the core 2 are brought, as shown in FIGS. 3 and 4 is shown. Due to the fact that the segments are only loose are held in the recesses 24, they can "swim" and thus align themselves to the areas of the core 2, the is touched by the surface 27.

"When it is required to withdraw the clamping part 3 from the core 2, compressed air is directed to the right side of the piston 14, whereby the nose portion 11 moves to the left and enables that the segments resume their collapsed shape, the spring 28 assisting this process.

If it is desired to replace the segments 6 so that a core with a different inner diameter can be clamped,

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then the piston 14 is moved to the left end of the cylinder 15, whereby the collapsed position of the segments 6 is brought about, as can be seen in FIG. 2, and the spring 28 is removed from the groove 29. The segments 6 can then be removed by tilting them in the same direction in which they are spread apart by the nose section 11, as set out above, and the end piece 26 of each segment can then pass through the gap between the nose 11 and the inner one Surface of the opening 26a in the plate 25 can be moved through. A set of three segments with different dimensions, however, necessarily has the same dimensions for the end pieces, which can now be inserted by a process reversed to the removal of the segments 6. After a roll is clamped by both clamping parts 3, 3a in a manner as described above in connection with clamping part 3, roll 1 is rotated due to the fact that a paper web is pulled off the roll, and thus a To operate effectively, a constant tension must be maintained on the web. A brake is normally provided for this square, and a disc brake as shown in FIG. 2 is used in the present invention.

The brake consists of two disks 31, 32 which are keyed at 33 on the shaft 7 between the extensions 9 of the stand 4. The shaft 7 and thus the cutting disks rotate in the bearings 8, .when the web is pulled from the roll 1 as a result of the frictional engagement between the nose portion 11 and the conical

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Surfaces 30 and also due to a wedge 34 which is held by the housing 18 and is in engagement with a: slot that is on the end face of the shaft 7 is provided (see Fig. 2).

Two levers 35 are held by a shaft journal 37, which are rotatably mounted in bearing plates 39 which are held by the stand 4 and extend between the extensions 9. A second pair of approximately identically designed levers 36 are held in a similar manner by a second shaft journal 38. (Only one of two levers, the lever 35, 36 can be seen in Fig. 2, the second lever of each pair is behind the plane of the drawing). Further levers 35a, 36a are attached to the shafts 37, 38 between the levers 35, 36. The ends of the levers 35a, 36a hold pads 40, 41 made of suitable friction material and are pressed against the disks 31, 32 in order to bring about the necessary braking effect. Two air cylinders 42, one attached to the end of each lever 35 and each having a piston rod 43, are provided with a cap 44 which engages the ends of the adjacent lever 36 when the piston rod 43 moves to the right \\ ^T ird (Fig. 2). This movement presses the linings 40, 41 against the disks 31, 32 against the action of a spring 45 which connects the levers 35, 36 to one another. By arranging the cylinders 42 in different locations, for example in the positions indicated by A and B along the levers in Fig. 2, the braking effect on the roller can be varied considerably. If only a slight braking force is required, one of the cylinders 42 can be severed or removed and / or the lining 41 can be moved away from the disc 32. Around

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To accomplish the latter, an adjustable threaded stop 46 is provided held by lever 36 and in its position is locked by a locking nut 38. An actuation: the cylinder 42 then only effects an actuation of the lever 35, and thus only the brake lining 40 is actuated in order to apply a braking force to the roller 1.

There may be various changes or modifications to the details of the frame described can be carried out without departing from the scope of the invention. For example, can the housing 18 can be removed and replaced by a housing with larger external dimensions, if segments are desired 6, which are designed for cores with a very large diameter. Another alternative does not require that the end pieces 26 of the segments 6 are free in the recesses 24, as • shown, but / can each on housing 18 by a Pin-slot connection are attached, which allows the required pivoting and radial freedom. With this arrangement If a change is desired, the segments 6 are removed together with the associated housing 18 and replaced by another housing replaced, in which the segments with the required dimensions are arranged in a similar way.

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Claims (6)

Patent attorneys Dr. (ng. H. Neo ^ ndsnk Dipl. Ing. H. Ti ^ uo-DIpI. Phys. VV. Sd.η «Hz Masson Scott Thrissell 8M «ndia« iS _f Moiert $ fr.23 Engineering Limited Τ «ΐ.538ββ86 Masson Scott Works, Riverside Rd., September 16, 1971 Summerstown, London, S.W.17, England Attorney File M-175 Claims Λ Frame for paper rolls or the like that are hollow Have core, characterized in that two axially aligned rotatably mounted shafts (7) are provided, their opposing ends releasably hold clamping devices (3, 3 a) that the shafts can be moved axially towards one another are arranged so that the clamping devices can be inserted into opposite ends of the roll core (2), the axially aligned with the shafts mix in the jigs is arranged that the jigs have a plurality of movable jaws (6), each of which is one with the core (2) has engageable surface (27) such that the jaws (6) are designed to be inserted into the end of the core (2) are that the surfaces are arranged in a cone shape, and that an actuating device (14,15,10) is provided which spreads the jaws (6) apart and brings the surfaces (27) into engagement with the core (2) in a cylindrical shape. -13- 209818/0572 BATH ORIGINAL 2. Frame according to claim 1, characterized in that the jaws each clamping device (2,3,3a) have the form of segments (6) which are loosely held in recesses (24) in one end face of one of two housings (18) are formed, and that the other ends of the jaws with the opposing ones Ends of the shafts (7) are releasably connected. 3. Frame according to claim 2, characterized in that the segments (6) (seen in the lease in which the clamping devices (3, 3a) are inserted into the core (2)) provided with a rearwardly extending projection (26) are, its movement and thus the ^ of each of the segments in cooperation with the actuating device by a plate (25) which is attached to the end face of each housing (18) is attached. 4. Frame according to one of claims 1 - 3, characterized in that that the detachable connection between the housing (18) and the shafts (7) is made by spring-loaded plungers (19), when depressed, allow the housings, including the plates and segments, to be axially off the shafts can be drawn. 5. Frame according to one of claims 1-4, characterized in that at least one of the shafts (7) with a brake connected is. -14- 209818/0572 ^8AD AH 6. Frame according to claim 5, characterized in that the brake is a disc brake having two discs attached to the shaft (7) and also two linings of friction material has, which are attached to pivot levers which are arranged so that the pads by pivoting movement of the lever pressed against the panes. 209818/0572 . ^K - _t Blank page