JP2006290624A - Method of carrying printed sheet by belt conveyer, and belt conveyer suitable therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the wear of a belt in a belt conveyer carrying sheets. <P>SOLUTION: The belt conveyer in a machine processing printed sheets, includes the belt 11 carrying the printed element sheets, and a roller 8 guiding the belt 11. The belt 11 has a plurality of openings 12, and the roller 8 has a plurality of pins 10 engaged with the plurality of the openings 12. Rings 14, 15 are supported on the roller 8 so as to be relatively rotate to the pins 10, and the belt 11 is plated on the rings 14, 15. The belt 11 is driven only by fitting of the pins 10 and the openings 12, and not driven by frictional-engagement between an inner surface of the belt 11 and a circumferential surface of the roller 8 due to the roller 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes a belt having a plurality of openings and conveying a printing sheet, and a plurality of pins engaging with the plurality of openings. The present invention relates to a method of conveying a printing sheet by a belt conveyor including a roller for guiding. Furthermore, the present invention includes a belt having a plurality of openings and conveying a printing sheet, and a roller having a plurality of pins engaged with the plurality of openings. The present invention relates to a belt conveyor of a machine for processing a printing sheet.

Patent Document 1 describes a belt conveyor. In the case of this belt conveyor, the opening is fixed with a metal ring. This metal ring minimizes the load on the opening when the pin is engaged. The disadvantage is that, on the one hand, the metal ring increases the manufacturing cost of the belt, and on the other hand, the metal ring can come off the belt due to the load. In this prior art, the cause of the opening load has not yet been recognized.
German Patent Application Publication No. 4017931

  SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method for conveying sheets and a belt conveyor suitable for carrying out this method, and to reduce belt wear more effectively by this method and belt conveyor. That is.

  This object is achieved by a method with the features of claim 1 and a belt conveyor with the features of claim 2.

  The present invention is to be printed by a belt conveyor having a plurality of openings and conveying a printed sheet of paper, a plurality of pins engaging with the plurality of openings, and a roller for guiding the belt. In the method of transporting the body sheets, the belt is driven substantially only by the fit between the pin and the opening, and substantially the frictional engagement between the inner surface of the belt and the circumferential surface of the roller by the roller. It is not driven by a combination.

  The present invention relates to a machine for processing a printed sheet including a belt having a plurality of openings and conveying a printed sheet, and a roller having a plurality of pins engaged with the plurality of openings. In this belt conveyor, at least one ring on which the belt is mounted is supported on a roller so as to be rotatable relative to the pin. The belt conveyor of the present invention is suitable for carrying out the method of the present invention.

  The present invention relates to a speed between the circumferential speed of the belt neutral line and the circumferential speed of the roller, which may be caused by a change in the radial position of the neutral line (neutral element). There is an underlying understanding that the difference causes belt wear. The radial position of the neutral line may change because, for example, the tension applied to the belt in advance becomes weak due to aging. The neutral line defines the effective radius of torque transmitted from the pin to the belt by the fit. In the belt of the prior art (Patent Document 1), the circumferential surface of the roller acts together by frictional engagement with the inner surface of the belt placed on the circumferential surface, and torque is similarly transmitted to the belt. When doing so, the circumferential surface of the roller similarly defines an effective radius for torque transmission. Since these two effective radii have different sizes, the above-described speed difference occurs.

  In the present invention, the frictional engagement acting between the inner surface of the belt and the circumferential surface of the roller is canceled by this frictional engagement so that torque can no longer be substantially transmitted from the roller to the belt. Speed differences and consequent belt wear are avoided. In the belt conveyor of the present invention, the speed difference is compensated for by the rotational movement of the ring relative to the pins. While the ring and the belt with the inner surface resting on the circumferential surface of the ring are in contact, there is substantially non-slip friction between both surfaces, i.e. substantially static friction. Has occurred. The rotational slip that compensates for the speed difference occurs between the ring and the components of the roller that support the ring, or occurs inside the ring. If the ring is configured, for example, as a plain bearing that slides on a component, slip occurs between the ring and the component. The component may be, for example, a roller shaft or a roller sleeve-shaped hollow shaft mounted on the shaft. For example, when a ring composed of a large number of parts is a roller bearing, slip occurs inside the ring.

  The dependent claims describe advantageous embodiments of the belt conveyor according to the invention.

  In one aspect, the pins are arranged in rows along the circumference of the roller, the rows being supported rotatably relative to the ring and the pins, and a belt resting thereon. Is located between another ring.

  In another aspect, the first mentioned ring is configured as the only ring that is a plain bearing, or the first mentioned ring and another ring are configured as a plain bearing.

  In another aspect, the first-mentioned ring is configured as the only ring that is a roller bearing, or the first-mentioned ring and another ring are configured as roller bearings.

  In another aspect, the roller comprises a portion on which the first-mentioned ring is rotatably mounted as the only ring, or the roller has a portion on which the first-mentioned ring rests rotatably. And another part on which another ring is rotatably mounted.

  Also included in the present invention is a sheet discharge device of a machine for processing a printed sheet, comprising a belt conveyor configured corresponding to the present invention or one of its aspects. A printing press provided with a belt conveyor configured in accordance with the present invention or any of its aspects likewise belongs to the present invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  In FIG. 1 to FIG. 7, members and components corresponding to each other are denoted by the same reference numerals.

  FIG. 1 shows a machine, in particular a printing machine 1, for processing a sheet 4 as a printing medium. The printing machine 1 includes a printing unit 2 for lithographic offset printing and a paper discharge device 3 that discharges a sheet 4. The paper discharge device 3 includes a chain conveyor 5 that conveys the sheets 4 and a belt conveyor disposed below the chain conveyor 5 and in front of the discharge pile 6 formed from the removed sheets 4. 7 and so on. The belt conveyor 7 is a sheet braking device, which decelerates the sheet 4 released from the chain conveyor 5 and conveys the sheet 4 to the discharge pile 6.

  FIG. 2 shows a state in which the belt conveyor 7 includes a first roller 8, a second roller 9, and an endless belt 11 wound around both rollers 8 and 9. The first roller 8 is a driving roller that drives the circulating motion of the belt 11, and the second roller 9 is a guide roller that is driven by the belt 11 and changes the direction of the belt 11. Since both rollers 8 and 9 are the same structure, the following description about the structure of the present 1st roller 8 is applicable also to the 2nd roller 9 in a metaphorical meaning.

  The first roller 8 has a plurality of pins 10 that engage with a plurality of openings 12 in the belt 11 in order to drive the belt 11. The plurality of pins 10 are arranged in the circumferential direction of the first roller 8 so that a certain distance existing between the pins 10 is expected to be exactly the same as a certain distance between the openings 12. It arrange | positions so that the row | line | column 17 which extends may be made. The opening 12 is a suction opening for sucking the sheet 4 to the outer surface 23 of the belt 11. An air intake box that abuts the inner surface 22 of the belt 11 and applies a vacuum to the opening 12 is not shown for better understanding of the drawing. The neutral line of the belt is indicated by reference numeral 25, and the roller circumferential surface of the first roller 8 is indicated by reference numeral 24.

  FIG. 3 shows a state in which the pin 10 is fitted into the shaft 13 constituting the central portion of the first roller 8.

  On the other hand, the pin 10 and the shaft 13 can be integrally formed by, for example, an injection molding method. In this case, the pin 10 is integrally formed with the shaft 13.

  As seen in FIG. 3, the first support ring 14 and the second support ring 15 are attached to the shaft 13 on the left and right sides of the row 17. Both support rings 14 and 15 are each configured as a roller bearing, and the inner bearing ring is non-rotatably mounted on the shaft 13 and forms a roller circumferential surface 24 (see FIG. 2). A belt 11 is placed on the circumferential surface of the bearing ring. The inner surface 22 of the belt 11 is placed only on both support rings 14 and 15 with respect to the first roller 8, and is not placed on any other member of the first roller 8. A cylinder, such as a sphere or a needle, disposed between the bearing rings 14, 15 is centered about a geometric axis 26 that occurs relative to the pin 10 within each support ring 14 or 15. Allows rotational movement. Both the support rings 14 and 15 are fixed in the axial direction by the pin 10 and the safety ring 16 so that the movement performed along the shaft 13 does not occur.

  FIG. 4 shows only the configuration of the shaft 13 having the first portion 19, the second portion 20, and the flange 21, and the configuration of both support rings 14 and 15 as slide bearings. The embodiment distinguished from the embodiment is shown. Accordingly, the first support ring 14 is rotatably mounted on the first portion 19, and the second support ring 15 is rotatably mounted on the second portion 20. A pin 10 projects from a flange 21 arranged between both parts 19, 20. The inner surface 22 of the belt 11 rests not only on the bearing outer surface of the bush-like support rings 14 and 15 but also on the flange 21 whose circumferential surface is flush with the bearing outer surface. Since the width of the flange 21 when measured in the direction of the rotation shaft 26 is much shorter than the combined width of both the support rings 14 and 15 when measured in the same direction, the circumferential surface of the flange 21 and the belt 11 The frictional engagement that occurs with the inner surface 22 is negligibly small with respect to the action of the force on the belt 11. This frictional engagement cannot actually cause an undesirable speed difference between the neutral line 25 and the roller circumferential surface 24.

  In some cases, the diameter of the flange 21 can be made only slightly smaller, so that the outer surface of the bearing no longer ends in the same plane as the flange 21 in the radial direction, but projects slightly above the flange 21 and the belt 11 is no longer in contact with the inner surface 22 of the flange 21.

  FIGS. 5 to 7 show an embodiment which is distinguished from the embodiment of FIG. 4 only in that the shaft 13 is configured as a sleeve-like hollow shaft in which another shaft 18 is non-rotatable. ing.

It is a figure which shows the printing machine provided with the belt conveyor as a sheet | seat braking device. It is a figure which expands and shows a belt conveyor compared with FIG. It is sectional drawing which follows the cutting line III-III of FIG. 2 which shows 1st Embodiment of a belt conveyor. FIG. 4 is a cross-sectional view taken along section line IV-IV in FIG. 2, showing a second embodiment of the belt conveyor. It is the figure seen in the radial direction which shows the modification of 2nd Embodiment. It is the figure seen in the axial direction which shows the modification of 2nd Embodiment. It is sectional drawing which follows the cutting line VII-VII line of FIG. 6 which shows the modification of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing machine 2 Printing unit 3 Paper discharge apparatus 4 Sheet paper 5 Chain conveyor 6 Paper discharge pile 7 Belt conveyor 8 1st roller 9 2nd roller 10 Pin 11 Belt 12 Opening 13 Axis 14 1st support ring 15 1st support ring 15 2 support ring 16 safety ring 17 row 18 another shaft 19 first part 20 second part 21 flange 22 inner surface 23 outer surface 24 roller circumferential surface 25 neutral wire 26 rotating shaft

Claims (8)

A plurality of openings (12), a belt (11) for conveying a printing sheet (4), and a plurality of pins (10) engaged with the plurality of openings (12), In a method for conveying the printing sheet (4) by a belt conveyor (7) including a roller (8) for guiding a belt (11),
The belt (11) is substantially driven only by the fit between the pin (10) and the opening (12), and substantially with the inner surface (22) of the belt (11) by the roller. A method for conveying a printing sheet by means of a belt conveyor, not driven by frictional engagement with the outer peripheral surface (24) of the roller (8). A roller (8) having a plurality of openings (12) and having a belt (11) for conveying the printed sheet (4) and a plurality of pins (10) engaged with the plurality of openings (12). A belt conveyor (7) of a machine (1) for processing a substrate sheet (4), in particular for carrying out the method according to claim 1 comprising:
At least one ring (14) on which the belt (11) is mounted is supported on the roller (8) so as to be rotatable relative to the pin (10). , Belt conveyors for machines that process printed sheets.   The plurality of pins (10) are arranged in a row (17) along the circumference of the roller (8), and the row (17) includes the ring (14) and the pin (10). The belt conveyor according to claim 2, wherein the belt conveyor is rotatably supported relative to the other and is arranged between another ring (15) on which the belt (11) rests.   The belt conveyor according to claim 2 or 3, wherein the ring (14) or each of the ring (14) and the further ring (15) is configured as a sliding bearing.   The belt conveyor according to claim 2 or 3, wherein the ring (14) or each of the ring (14) and the further ring (15) is configured as a roller bearing.   The roller (8) is provided with a portion (19, 20) on which the ring (14, 15) is rotatably mounted on each ring (14, 15). The belt conveyor according to any one of 5 to 5.   A sheet discharge device for a machine (1) for processing a printed sheet (4), comprising the belt conveyor (7) according to any one of claims 2 to 6.   A printing machine comprising the belt conveyor (7) according to any one of claims 2 to 6.

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