MXPA97009632A - Assembly for feeding a continuous tape from a ro - Google Patents

Abstract

An assembly for feeding a continuous belt from a roll including a frame having mounted a pair of vertical guides which carry lifting assemblies that can move vertically. Each lifting assembly is moved by motor through a chain attached at its opposite ends and placed around a pulse catarina and a crazy catarina supported by the frame. Each chain is also placed around a crazy catarina and of crazy poles supported by the hoisting assembly whereby the rotation movement of the impulse catarina in opposite directions causes the hoisting assembly to rise or fall along the vertical guide raising or lowering, in this way, the roll. A tensioning belt and continuous belt drive assembly moves toward and away from the roll and includes a movable roll drive with it to engage and move the roll

Description

ASSEMBLY FOR FEEDING A CONTINUOUS TAPE FROM A ROLL DESCRIPTION Background and field of the invention.

The present invention relates to a roll feeder assembly for lifting, holding and feeding a continuous web product of a roll of this and particularly relates to a roll feeder assembly having a unique lifting system for lifting a roll and a impulse mechanism system making it possible for the roll to be fed at high speed.

Machines for lifting, holding and feeding continuous ribbon products, for example, paper from a roll, have been constructed in the past. Strict requirements must be met to feed high-speed continuous ribbon products from rolls, particularly in view of the nature and weight of the continuous ribbon product. For example, it is desirable to feed a roll of paper 52 inches in diameter, 19 inches wide and weighing up to 1400 pounds at the request of the downstream processing units and at speeds of up to 600 feet per minute. These needs require a particularly robust machine which is relatively simple and fail-safe in construction. In accordance with the present invention, there is provided a roll feed assembly comprising a frame having along a pair of vertical guides and a pair of horizontal guides along opposite sides. The vertical guides are located adjacent an open end of the frame to receive a roll containing the continuous ribbon product. A lifting system is provided on each vertical guide and includes a carriage mounted to move generally vertically along each vertical guide. Each carriage includes a support for an arrow of the axis of a roll containing the continuous ribbon product, for example, a roll of paper. The bracket includes a pair of bearings to hold one end of the shaft shaft in an upright position, an axial load bearing to support the axial loads on the shaft shaft, and a movable bearing to capture the end of the shaft in conjunction with the pair of bearings. of the shaft arrow. The cart of each lifting assembly also carries a crazy Catharina. Drive mechanisms are provided for the hoisting assemblies and include a chain on each side of the frame practically fixed at their opposite ends. Each chain has intermediate parts placed around the crazy Catarina of the corresponding car and a pair of crazy rolls in the frame. An additional crazy Catarina is fixed to each side of the frame at a height greater than the maximum height of the roll axis when it is placed on the roll feed assembly. With the opposite ends of each chain practically fixed, an impulse catarina, also fixed to the frame, raises and lowers the trolleys in response to the rotation of the impulse catarina in opposite directions, respectively. That is, to lift the trolleys, each trolley takes the chain of the raised fixed end of the chain, while providing chain to the lower opposite fixed end of the chain. The impulse sprockets for the lifting assembly are coupled by means of an additional chain drive mechanism to a transmission shaft. The transmission shaft is moved by means of a motor which drives a worm gear combination. Using a worm gear combination, the weight of the load can not drive the drive mechanism of the lifting assembly in the opposite direction. Positioned between the sides of the frame is a continuous belt tensioning mechanism and a drive mechanism assembly mounted to move along the horizontal guides in directions towards and away from the roll between the hoisting assembly carriages.

In particular, the opposite ends of the chains are secured to the carriages that can be moved horizontally mounted to move along the horizontal guides. A second motor moves the chains so that the horizontal carriages and therefore the tensioning and impulse mechanism assembly of the continuous belt move towards and away from the roll. The continuous belt tensioning and drive mechanism assembly also includes a roll drive assembly, preferably composed of an endless band mounted to move between a pair of vertically separated rollers. A third motor transported by the tensioning and impulse mechanism assembly of the continuous belt moves the continuous or endless belt. The web can drive the roll at a desired speed by moving the tension and drive mechanism assembly of the continuous belt, so that the belt drives the face of the roll, and adjusting the speed of the third motor, while maintaining the control on the roll by means of the pressure applied by the band against the roll. In addition, carriages that can be moved horizontally transport a pair of crossbar support. The roll drive including the web, the vertically separated roller and the third motor can be moved in a vertical direction to adjust the clutch location of the web and the roll in accordance with the roll width. In a preferred embodiment according to the present invention, there is provided a roll feeding assembly for feeding a continuous ribbon product from a roll having a supporting arrow, comprising a frame having a pair of guides extending generally vertically and a pair of guides extending generally horizontally, a pair of hoisting assemblies mounted for generally vertical movement along the pair of vertical guides, respectively, each lifting assembly includes a support for holding one end of the roll support shaft and a first catarina which can be rotated with respect to the hoisting assembly, a drive mechanism for each hoisting assembly including (i) a chain fixed substantially at its ends opposite the frame with intermediate portions of the same engaging the hoisting assembly, an intermediate portion of the chain is placed around the first ca tarina, (ii) an impulse catarina transported in a rotatable way by the frame and coupled to the chain, and (iii) a motor coupled to the impulse catarina to move the impulse sprockets and move the lifting assemblies along the the vertical guides with which the roll transported in this way moves vertically, a continuous belt tensioning mechanism and a drive mechanism assembly transported by the frame to move along the horizontal guides towards and away from the roll carried by the hoisting assemblies and including an element that can be engaged with the roll to rotate the roll, a motor coupled to the tensioning mechanism and continuous belt drive assembly to move the tensioning and driving mechanism assembly of the tape continues along the frame and a third motor coupled to the element to move the element and thus rotate the roll to feed the tape product. inua from there. Therefore, it is a main object of the present invention to provide a novel and improved roll feeding assembly for lifting, holding, feeding and controlling the tension in the fed belt fed from the roll.

Brief description of the drawings.

Figure 1 is a perspective view of a roll feed assembly in accordance with the present invention. Figure 2 is a schematic side elevational view illustrating the drive mechanism for the lifting assemblies and the tensioning and driving mechanism assembly of the continuous belt. Figure 3 is an enlarged elevation view of a lifting assembly. Figure 4 is a side elevational view of the same. Figure 4A is an exploded view of an arrow end capture assembly of the shaft. Figure 4B is an enlarged and partial sectional view of the capture assembly of Figure 4A. Figure 5 is a schematic view of the tension and drive mechanism assembly of the continuous belt leaning against the roll and the continuous ribbon product being fed from the roll.

Detailed description of the drawings, Referring to Figure 1, there is illustrated a roll feed assembly in accordance with the present invention, generally designated 10, and including a frame F having frame side members 12 interconnected by means of frame transverse members 14. As shown, the frame is open at its front end to receive a roll of continuous web product, eg paper, between the side frames 12 and between the lifting assemblies, designated generally by 16. The frame 12 can be mounted on wheels 18 and carries extendable feet 20 to fix the frame 12 at a predetermined location. The frame 12 includes a pair of guides 22 that extend vertically and separate laterally as well as a pair of guides 24 extend generally horizontally and separate laterally. The guides 22 and 24 form structural parts of the frame 12. As will be appreciated, each lifting assembly 16 is mounted for vertical movement along a vertical guide 22 and holds one end of the arrow of the shaft passing through the axis of the roll placed at the open end of the frame 12. With reference to figure 3, each assembly of Lifting 16 includes a carriage comprising an enclosure 28 mounted for sliding movement along a guide 22. The enclosure 28 includes a rear support plate 30 secured to an internal plate 32. The internal plate, as illustrated in FIGS. and 4, has a plurality of bearings 34 for engaging rollers along the inner face of the vertical guides 22. The outer plate 30 has a plurality of rollers 36 mounted along their opposite sides, as well as a roller 38 (figure 1) projecting through the plate 30 to engage along the sides and the outer surface of the vertical guides 22. In this way, each carriage 26 is mounted to move along the guide 22. Each c arro 26 includes a pair of cam rollers 40 that are placed on opposite sides of an axial thrust bearing 42. The thrust bearing accommodates any axial thrust of the shaft arrow supporting the roll, for example when the arrow is slightly off of transversal alignment. A third cam roller 44 is mounted (Figures 3 and 4a) on a T-nut 43 for movement of the carriage 26 in a T-slot 46, the assembly is effected by means of a stop bolt 45. A roller pivot 47 extends from the T-nut 43 and captures an end of a spring 53, the lower end of which extends within an opening in a disk 49 behind the thrust bearing 42. The thrust bearing 42 is supported on a pivot of bearing 51 supported by the disc 49. The disc 49 thus secures the lower part of the compression ring 53 and the thrust bearing 42 at the same time that it allows the thrust bearing to rotate. Therefore, the cam roller 44 is mounted for a sliding movement towards and away from the shaft arrow and it will be appreciated that the spring 53 holds the T-nut 43 and the cam roller 44 next to the top of the slot in T 46.

It will also be noted that the shaft end of the shaft can also be captured between the three cam followers 40 and 44 when the cam roller 44 and the carriage 26 are relatively offset to engage the cam followers 40 and 44 around the end of the cam. arrow. To accomplish this, an actuator 55 (Figure 4A) is mounted in an adjustable and vertical manner on the vertical guide 22. The actuator 55 is preferably a U-shaped clamp located on the guide 22 just below the upper extent of the assembly travel. of lifting 16. As the lifting assembly moves up along the guide 22, the actuator 55 engages the T-nut 43, stopping its upward travel while the lifting assembly 16 moves continuously upwardly. . This relative difference in movement causes the cam rollers 40 supporting the arrow end of the shaft to be closed with the upper cam roller 55 until the shaft arrow makes contact with the cam roller 44. Simultaneously, it is activated a limit switch for stopping the upward movement of the lifting assembly 16 as described below. The downward movement of the lifting assembly causes the cam rollers 40 to move away from the cam roller 44 while the spring 53 keeps the nut T 43 in contact with the actuator 55. As the lifting assembly 16 moves downward, the T-nut 43 is disengaged from the actuator 55 and retained at the upper end of the T-slot by means of the spring 53. This releases the shaft arrow from its captured position between the cam rollers 40 and 44. Supported by and adjacent to the upper end of the carriage 26 is a crazy jack nut 48. At the lower end of the carriage 26, a pair of lug poles 50 are longitudinally spaced apart from each other and below the cam followers 40. As is illustrated more clearly in figures 1 and 2, a drive mechanism is provided for raising and lowering each lifting assembly 16. The driving mechanism comprises for each lifting assembly a chain 60, one end of which is fixedly mounted to a support 62 adjacent to one end upper of the guide 22. The chain 60 is placed around the crazy Cattarine 48 of the lifting assembly 16 and is placed around another crazy Catharine 66 mounted on the support 62. The chain extends from the Catharine 66 around a set of Catarina teeth of a double Catarina 68 fixed to the lower part of the frame. The chain 60 extends from the Catarina 68 on the crazed posts 50 of the hoisting assembly and is subsequently fixed to a spring-loaded Catarina 70, supported for limited rotational movement by the frame 12.

Also, as illustrated in Figures 1 and 2, a transmission shaft 72 extends between opposite sides of the frame and supports a pair of sprockets 74 and 76 at opposite ends. The sprockets 74 and 76 have endless chains 78 which clutch around the other toothing of the double sprockets 68. A large sprocket 80 is placed on the transmission shaft 72 and moved by means of a chain from a gear 82. An MI motor moves. an auger 83 (FIG. 2) in engagement with the gear 84 on the common arrow. As a consequence of this arrangement, it will be noted that the double sprockets 68 are rotated by the MI motor through the worm gear 83, the gear 84, the Catarina 82, the Cattarine 80, the sprockets 76 and 74 and the chains 78. Impulsing the double catarina 68 of each hoisting assembly, for example, clockwise as shown in figure 2, the fixed Catarina 68 that will rotate will take chain of the catarinas 48 and 66, causing the assembly of lifting 16 rises along the guide 22. Simultaneously, each Catarina 68 provides chain to the crazy poles 50 as the lifting assembly rises. Each Catharine 70 is tightened by means of a spring to provide additional chain to the lifting assembly when the latter is adjacent to the bottom of its vertical travel. Also note that the lifting assembly 16 in Figure 2 rises above the bottom of the frame and particularly of the sprockets 68 and 70. The sprockets 68 and 70, however, they are separated enough so that the lifting assembly can be lowered between the sprockets. By moving the chains 60 by means of the MI motor as discussed above, the lifting assemblies 16 are raised along the guides 22 until a limit switch, not shown, is activated, which de-energizes the motor MI. For that moment, the roll has been raised to a maximum elevation relative to the frame. By operating in reverse mode the MI motor, the double sprockets 68 move so that the chains 60 are taken from the crazy poles 50 and pass back to the sprockets 66 and 48, thereby lowering the lifting assemblies 16 along the the guides 22. Also mounted on the frame 12 is an assembly of tensioning and continuous belt drive mechanism, designated generally 90, for rotating the roll and applying a tension thereto. The assembly 90 is mounted along the horizontal guides 24 for movement in directions towards and away from the open end of the frame 12, i.e., toward and away from the roll mounted between the lifting assemblies 16. To achieve this, the assembly 90 includes a pair of carriages 92 along respective opposite sides of the frame. The carriages essentially envelop the guides 24 and support bearings 94 along the top, bottom and side of the carriages to engage by clutch along the guides 24 whereby the carriages move towards and away from the roll. To move the carriages and therefore the tensioning mechanism and belt drive assembly 90 continues along the guides 24, an M2 motor is mounted on the frame and drives a worm 96 (FIG. 2) engaging a gear 98 The gear 98 moves a Catarina 100 connected by means of a chain 102 to a second Catarina 104 mounted on the frame 12. An arrow 106 connects the Catarina 104 with another Catarina on the opposite side of the frame. A chain 108 is placed around the sprockets 110 and a crazed cattarine 112 is also mounted forward on the frame adjacent the forward end of the guide 24. The ends of each chain 108 are secured to the carriage 92 on respective opposite sides of the frame. Accordingly, by driving the M2 motor and through the gear / worm drive arrangement, the chains 108 advance or retract the tensioning and driving mechanism assembly of the continuous belt 90 towards and away from the roll, respectively. A pair of arrows 120 extend between support plates 121 supported by means of the carriages 92 and mounting support plates 122 for a continuous band 124 forming part of a roll drive assembly. The web 124 is mounted around a pair of vertically spaced rollers 126, around a idler roller 128 (FIG. 2) and around a drive shaft 138. The drive shaft 138 is moved by means of an M3 motor supported by and for movement with the tension and drive mechanism assembly of the continuous belt 90. When the motor M3 is actuated, the belt 124 moves in the proper direction to feed the continuous belt product from the roll when the belt is engaged against the roll. . During the operation, a roll is placed between the sides of the frame and between the lifting assemblies 16, with an arrow of the shaft installed in the roll almost coinciding with the axis of the roll. The MI engine is actuated to drive the chains 60, lifting the lifting assemblies 16 with the ends of the shaft arrow captured between the cam rollers. The motor continues to raise the lifting assemblies 16 until the center of the roll is approximately 27 inches above the floor, by that time, the lifting assemblies activate a limit switch, deactivating the MI motor. Then the M2 motor is activated to move the tensioning and impulse mechanism assembly of the continuous belt forward against the inner face of the roll until the band 124 has been adequately tensioned against the inside face of the roll. The continuous web product is then passed around several rollers downstream of the roll feed assembly (Figure 5) and through the printing units illustrated schematically in P. Detectors or sensors can be used to detect the loop by gravity 130 of the ribbon continues downstream of the roll to move the roll or eliminate roll movement. When the tie is shortened, the roll can be accelerated by activating the M3 motor to drive the roll at the appropriate angular velocity. When the loop is detected to be long, the detector deactivates the M3 motor. Even though the invention has been described in relation to what is currently considered the most practical and preferred embodiment, it should be understood that the invention is not to be limited to the described modality, but on the contrary, it is intended to cover different modifications and modifications. equivalent arrangements included within the scope and content of the appended claims.

Claims (8)

1. A roll feed assembly for feeding a continuous ribbon product from a roll having a support arrow, characterized in that it comprises: a frame having a pair of guides that extend generally vertically and a pair of guides that are they generally extend horizontally; a pair of hoisting assemblies mounted to move generally vertically along the pair of vertical guides, respectively, each hoisting assembly including a support for holding one end of the roll holding shaft and a first rotatable Catarina in relation to the lifting assembly; an impulse mechanism for each hoisting assembly that includes (i) a chain fixed practically at its ends opposite the frame with intermediate portions of it clutching the hoisting assembly, an intermediate part of the chain is placed around the first catarina, ( ii) a pulse catarina supported in a rotating manner by the frame and coupled to the chain, and (iii) a motor coupled to the impulse catarina to move the impulse sprockets and move the lifting assemblies along the vertical guides whereby the roll transported in this way moves vertically; a continuous tension and belt drive mechanism assembly carried by the frame for movement along the horizontal guides towards and away from the roll carried by the lifting assemblies and including an element that can be engaged with the roll to rotate the roll; a motor coupled to the tensioning mechanism and belt drive assembly continuous along the frame; and a third motor coupled to the element to move such an element and thereby rotate the roll to feed the ribbon product from there. A roll feed assembly according to claim 1, further characterized in that the impulse catarina engages the chain in a part along the chain between the intermediate portions thereof. 3. A roll feed assembly according to claim 1, further characterized in that the hoisting assembly drive mechanism includes a crazy catharine carried by the frame at a height above a maximum lift of the hoisting assembly throughout of the vertical guides, the chain is placed around the crazy Catarina in a position along it between the first Catarina and the impulse Catarina, the first Catarina is placed on the lifting assembly at a height higher than the support of the arrow and one of the intermediate parts of the chain clutching the lifting assembly at a height below the arrow support. 4. A roll feed assembly according to claim 1, further characterized in that each drive mechanism of the hoisting assembly includes a crazy catharine supported by the frame at a height above a maximum lift of the hoisting assembly throughout of the vertical guide, the chain is placed around the crazy Catarina in a position along it between the first Catarina and the impulse Catarina, a second Catarina tightened by means of spring transporting in fixed form one end of the chain for provide additional chain when operating the motor. A roll feed assembly according to claim 1, further characterized in that it includes a gear drive mechanism / auger coupled to the motor to prevent the roll from driving the auger in a direction opposite to a direction for raising the roll . 6. A roll feed assembly according to claim 1, further characterized in that the tensioning and driving mechanism assembly of the continuous tape includes a roll driving mechanism that raises such an element, the element comprises a continuous band for engaging the roll and a carriage for movement along the horizontal guides, chains along opposite sides of the frame placed around horizontally separated catarina and having ends thereof connected to the carriage, the motor is coupled to the chains by means of a pulse catarina. A roll feed assembly according to claim 6, further characterized in that each support includes a first and a second element for engaging one end of the roll support shaft, such elements are mounted for relative movement between a first position with the first element supporting the end of the roll support arrow and the second element separated therefrom and a second position with the first and second elements being crimped around and thus capturing the end of the roll supporting arrow. A roll feed assembly according to claim 7, further characterized in that the second element can be moved to the second position in response to the hoisting assembly obtaining a predetermined height along the length of the guide.