JP2014012249A - Paper powder removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a conventional removing device cannot sufficiently remove paper powders adhered to a surface of roll-shaped sanitary paper.SOLUTION: A paper powder removing device 10 for removing paper powders adhered to a toilet roll W carried on a carrying conveyer 1 while keeping an axis in parallel with a carrying direction, includes: a frame body 11 surrounding a carrying surface 2a of the carrying conveyer 1, and defining a space 14 through which the toilet roll W passed between the carrying surface 2a of the carrying conveyer 1 and the frame body 11; and compressed air supplying means 12 coupled to the frame body 11 and supplying compressed air into the space 14. The carrying surface 2a of the carrying conveyer 1 has a first inclining portion 1a inclining to one side in a width direction in the space 14, and a second inclining portion 1b inclining to the other side in the width direction. The compressed air is supplied into the space 14 so as to add rotation force in a direction in which the toilet roll W is rolled along the first or second inclining portion 1a or 1b by gravity, to the toilet roll W.

Description

  The present invention relates to an apparatus for removing paper dust and the like adhering to a roll-like sanitary paper during the manufacture of the roll-like sanitary paper.

  When manufacturing roll-like sanitary paper such as toilet rolls and kitchen paper, a log is formed by winding a predetermined amount of base paper of substantially the same width around a long paper tube in advance. And while conveying this log along the longitudinal direction axis line, after cutting a part located in the conveyance direction most foremost in a cutting process into a predetermined product width by a log cutter, a plurality of rolls in a packaging process Sanitary paper is packaged in an aligned state and shipped as a product. Patent Document 1 discloses a line from such cutting to packaging.

JP 2010-213953 A JP 2008-230787 A

  In the manufacturing process of roll-like sanitary paper, pulp fibers that are peeled off from the base paper may become paper dust and adhere to the log or the like, or various foreign matters generated in the production facility or the like may adhere to the log. In particular, in a toilet roll production line in which the binding strength of pulp fibers is set to be relatively weak, paper dust generated during cutting by a log cutter becomes dusty and adheres to the surface of the roll-like sanitary paper that is the product. , Will reduce the appearance of the product.

  Patent Document 2 proposes an apparatus for removing paper dust adhering to a base paper by applying vibration to the base paper being conveyed. However, such a paper dust removing device cannot sufficiently remove paper dust attached to the surface of the roll-like sanitary paper.

Object of the invention

  An object of the present invention is to provide a paper dust removing device that can efficiently remove foreign matters such as paper dust adhering to the surface of a rolled sanitary paper.

  A paper dust removing device according to the present invention is a device for removing paper dust adhering to a roll-like sanitary paper conveyed on a conveyor with its axis parallel to the conveying direction, surrounding the conveying surface of the conveyor, A frame body that defines a space through which the roll-like sanitary paper passes with the conveying surface of the conveyor; and a compressed air supply means that is connected to the frame body and supplies compressed air to the space. The transport surface has a first inclined portion inclined to one side in the width direction in the space, and a second inclined portion inclined to the other side in the width direction. The roll-like sanitary paper is supplied with a rotational force in a direction rolling by gravity along the inclination of the first or second inclined portion.

  In the present invention, the roll-like sanitary paper is transported while being placed on the transport surface of the conveyor so that its axis is parallel to the transport direction of the conveyor. When the roll-like sanitary paper reaches the space defined between the frame of the paper dust removing device and the conveying surface of the conveyor, the compressed air supplied from the compressed air supply means is blown to the roll-like sanitary paper. Paper dust adhering to the surface etc. is blown away. Further, when passing through the first inclined portion and the second inclined portion of the conveyor conveying surface, the paper rolls on the conveyor conveying surface in the left-right direction perpendicular to the conveying direction by gravity and adheres to the roll-like sanitary paper. Powder separation is promoted. In this case, the compressed air supplied from the compressed air supply means is sprayed onto the roll-like sanitary paper so as to promote the rolling of the roll-like sanitary paper, and the paper dust is more reliably removed from the entire surface.

  In the paper dust removing device according to the present invention, the first inclined portion and the second inclined portion can be alternately arranged along the conveyance direction of the roll-like sanitary paper. In this case, it can further have a non-inclined part where the conveyance surface of the conveyor became horizontal between the first inclined part and the second inclined part.

  Paper dust suction means for sucking together with air paper dust that is connected to the frame and intervenes in the space can be further provided. In this case, the paper dust suction means has a separator that separates paper dust and air, and the compressed air supply means can be connected to the air outlet of the separator.

  According to the paper dust removing device of the present invention, since the roll-like sanitary paper is rolled and compressed air is blown onto the roll-like sanitary paper, the paper dust can be blown off from the entire surface of the roll-like sanitary paper.

  When the first and second inclined portions are alternately arranged along the conveyance direction of the roll-like sanitary paper, the roll-like sanitary paper rolls alternately in the left-right direction perpendicular to the conveyance direction. Paper dust can be blown off more reliably from the entire surface.

  When the non-inclined part in which the conveying surface of the conveyor is horizontal is provided between the first inclined part and the second inclined part, the roll-like sanitary paper can be rolled more smoothly.

  When paper dust suction means that sucks together with air the paper dust that is connected to the frame and sucks the air is further provided, the paper dust blown off by the compressed air is defined between the frame and the conveying surface of the conveyor. Can be excluded from the space. As a result, it is possible to prevent the paper powder from reattaching to the roll-like sanitary paper, and it is possible to keep the atmosphere of the production line clean. In particular, when the paper powder suction means has a separator that separates paper powder and air, and the compressed air supply means is connected to the air outlet of this separator, the paper powder can be collected, and the atmosphere of the production line is further increased. Can be kept clean.

It is a top view of one embodiment of a paper dust removing device according to the present invention. It is a three-dimensional projection figure showing the external appearance of embodiment shown in FIG. 1 in the decomposition | disassembly state. It is sectional drawing along the III-III arrow in FIG. It is sectional drawing along the IV-IV arrow in FIG. It is sectional drawing along the VV arrow in FIG. FIG. 2 is a circuit diagram of an air supply / discharge system in the embodiment shown in FIG. 1. It is sectional drawing of other one Embodiment of the paper dust removal apparatus by this invention, and respond | corresponds to FIG. 3 of previous embodiment.

  An embodiment in which a paper dust removing device according to the present invention is incorporated in a toilet roll production line will be described in detail with reference to FIGS. However, the present invention is not limited to such an embodiment, and may be applied to any roll-like sanitary paper that needs to remove paper dust adhered at the time of manufacture, such as a kitchen roll other than a toilet roll. Can do.

  The planar structure of the present embodiment is schematically shown in FIG. 1, the appearance is shown in an exploded state in FIG. 2, and the cross-sectional shapes along the arrows III-III, IV-IV, and VV in FIG. The air supply / discharge system is schematically shown in FIG. The paper dust removing apparatus 10 in the present embodiment transports between a log by a log cutter, that is, a step of cutting a long toilet roll into a product width and a step of packing the cut toilet rolls W by a predetermined number. Arranged during the process.

  Individual toilet rolls W cut to a product width by a log cutter (not shown) are mounted on a pair of transport conveyors 1 arranged in parallel and close to each other, and transported to a packing process. The toilet roll W as the roll-like sanitary paper of the present invention is placed on the transport surface 2a of the transport conveyor 1 at predetermined intervals so that the longitudinal axis thereof is parallel to the transport direction by the transport conveyor 1, and this transport The conveying surface 2a of the conveyor 1 is basically set horizontally.

  The paper dust removing device 10 according to the present embodiment includes a frame body 11 surrounding the transport surface 2a of the transport conveyor 1, and compressed air supply means 12 and paper powder suction means 13 respectively connected to the frame body 11. .

  The frame body 11 in the present embodiment is arranged in parallel with the pair of side wall portions 11 a arranged in the vicinity of both side edges of the conveyance surface 2 a of the conveyance conveyor 1 and the conveyance surface 2 a of the conveyance conveyor 1. It has the upper wall part 11b to which a width direction both edge part connects to the upper end part of a pair of side wall part 11a. The frame body 11 having such a groove-shaped cross section defines a space 14 through which the toilet roll W passes with the transport surface 2a of the transport conveyor 1. The frame 11 in the present embodiment includes a partition wall 15 that is arranged in parallel with the pair of side wall portions 11 a between the two conveyors 1 and partially partitions the previous space 14. The upper end of the partition wall 15 may be extended upward to be integrally connected to the upper wall portion 11b of the frame body 11. It should be noted that such a partition wall 15 is not necessary in a system that uses only one transport conveyor 1.

  The conveyor 1 in the present embodiment includes a first inclined portion 1a in which the conveying surface 2a is inclined to one side in the width direction in the space 14, a second inclined portion 1b that is inclined to the other side in the width direction, and the first Between the inclined part 1a and the second inclined part 1b, there is a non-inclined part 1c in which the transport surface 2a is horizontal. The 1st inclination part 1a inclines so that the toilet roll W may roll to the partition wall 15 side by gravity, and the 2nd inclination part 1b inclines so that the toilet roll W may roll to the side wall part 11a side by gravity. In order to form these two inclined parts 1a and 1b, guide members 3 for inclining the belts 2 of the conveyor 1 are provided respectively. The guide member 3 of this embodiment having a wedge-shaped cross section has a side wall portion 11a side in the first inclined portion 1a so as to push up one side in the width direction of the belt 2 of the conveyor 1 upward from the regular conveying surface 2a. In the second inclined portion 1b, it is arranged close to the partition wall 15 side. As the guide member 3, it is possible to use a ball transfer or the like that is not in sliding contact with the back surface of the belt 2 as described above but is in rolling contact.

  In the present embodiment, one each of the first inclined portion 1a, the non-inclined portion 1c, and the second inclined portion 1b is formed, but a plurality of each can be formed as necessary, and further, the non-inclined portion 1c may be omitted. In this case, it is effective to arrange the first inclined portion 1a and the second inclined portion 1b alternately along the transport direction of the toilet roll W.

  Compressed air supply means 12 for supplying compressed air to a space 14 defined by the belt 2 and the frame 11 of the conveyor 1 includes an injection pump 12a, a check valve 12b, a pressure accumulating tank 12c, and a pressure reducing valve. 12d, the injection nozzle 12e, and the air piping 12f which connects these. High-pressure air is stored in the pressure accumulation tank 12c from the injection pump 12a via the check valve 12b. The high-pressure air stored in the pressure accumulating tank 12c in this way is adjusted to a predetermined pressure by the pressure reducing valve 12d, and is injected into the space 14 by the injection nozzle 12e fixed in a penetrating manner to the frame 11, and the toilet roll W Blows away foreign matters such as paper dust attached to the surface of the paper.

  In addition to the pair of side wall portions 11 a and the upper wall portion 11 b of the frame body 11, the injection nozzle 12 e is also appropriately disposed on the partition wall 15. These injection nozzles 12 e are embedded in the side wall portion 11 a, the upper wall portion 11 b, and the partition wall 15 so as not to protrude into the space 14. Along with this, a part of the air pipe 12 f of the injection nozzle 12 e disposed on the partition wall 15 is embedded in the partition wall 15 and pulled out from the lower end of the partition wall 15. In addition, the injection nozzle 12e distribute | arranged to the partition wall 15 is distribute | arranged in the reverse direction toward the side wall part 11a, respectively.

  In the present embodiment, in addition to gravity, the toilet roll W is urged by the rotational force in the direction of rolling by gravity along the inclination of the first and second inclined portions 1a and 1b. . More specifically, in the first and second inclined portions 1a and 1b, the air from the spray nozzle 12e is sprayed in the tangential direction with respect to the outer peripheral surface of the toilet roll W. The position and orientation are specified. That is, the injection nozzle 12e fixed to the side wall portion 11a in the first inclined portion 1a is arranged close to the upper wall portion 11b, and the injection nozzle 12e fixed to the upper wall portion 11b is arranged close to the partition wall 15. Yes. When the diameter of the toilet roll W is represented by d, in this embodiment, the spray nozzle 12e disposed on the side wall portion 11a is opened to a position lowered from the upper end position of the toilet roll W to the belt 2 side by (d / 4). ing. Further, the position of the injection nozzle 12e disposed on the upper wall portion 11b is offset toward the partition wall 15 by (d / 4) with respect to the central axis in the width direction of the belt 2. Similarly, in the second inclined portion 1b, the injection nozzle 12e is arranged on the upper wall portion 11b near the side wall portion 11a, and is arranged on the upper end portion of the partition wall 15 near the upper wall portion 11b. In the present embodiment, the injection nozzle 12e disposed on the partition wall 15 is opened at a position lowered from the upper end position of the toilet roll W to the belt 2 side by (d / 4). Further, the position of the injection nozzle 12e arranged on the upper wall portion 11b is offset toward the side wall portion 11a side by (d / 4) with respect to the central axis in the width direction of the belt 2. In regions other than the first and second inclined portions 1b, the injection nozzle 12e fixed to the side wall portion 11a and the partition wall 15 is disposed in the vicinity of the transfer surface 2a of the transfer conveyor 1, and is fixed to the upper wall portion 11b. The injection nozzles 12e are arranged at a position directly above the toilet roll W and on both sides thereof.

  The paper dust suction means 13 for sucking the paper dust intervening in the space 14 together with air has a suction nozzle 13a, a suction pump 13b, a cyclone separator 13c, and an air pipe 13d connecting them. The air outlet 13e of the cyclone separator 13c in this embodiment is connected to the injection pump 12a of the previous compressed air supply means 12 via an air pipe 12f. Foreign matter such as paper dust floating in the space 14 is sent to the cyclone separator 13c from the suction pump 13b through the suction nozzle 13a together with air, and the paper dust separated here is recovered, and the remaining air is again injected into the injection pump. It is sent to the pressure accumulation tank 12c by 12a. The suction nozzle 13a is disposed in the vicinity of the transport surface 2a of the transport conveyor 1 on the side wall 11a and the partition wall 15 of the frame 11, and the suction nozzle 13a disposed on the partition wall 15 is directed toward the side wall 11a. It is in the state opened in the reverse direction. The suction nozzle 13 a is embedded in the side wall 11 a and the partition wall 15 so as not to protrude into the space 14. Accordingly, a part of the air pipe 13d of the suction nozzle 13a disposed on the partition wall 15 is embedded in the partition wall 15 and is drawn out from the lower end of the partition wall 15 to the outside. The suction nozzle 13 a is fixed to the partition wall 15 in the first inclined portion 1 a, and this is arranged close to the transport surface 2 a of the transport conveyor 1. Moreover, in the 2nd inclination part 1b, although the suction nozzle 13a is fixed to the side wall part 11a, these are distribute | arranged and adjoined to the conveyance surface 2a of the conveyance conveyor 1. FIG. In the region other than the first and second inclined portions 1a and 1b, the suction nozzle 13a is fixed only to the side wall portion 11a, but these are arranged close to the partition wall 15.

  It should be noted that the flow rate of air injected from all the injection nozzles 12e and the flow rate of all the suction nozzles 13a so that the flow rate of air sucked from the space 14 is the same or slightly larger than the flow rate of air blown into the space 14. The air flow to be sucked is set. Further, the positions of the ejection nozzle 12e and the suction nozzle 13a are not limited to the above-described embodiment, and can be appropriately changed according to the flow state of the paper dust and air in the space 14, and the shape of the opening is also conveyed by the conveyor. It may be a long and narrow one along the conveyance direction.

  Therefore, in the space 14 defined by the transport surface 2a of the transport conveyor 1 and the frame 11, air is blown from the spray nozzle 12e to the toilet roll W placed on the transport surface 2a of the transport conveyor 1. . As a result, foreign matter such as paper dust adhered to the surface of the toilet roll W is removed, and the foreign matter including the removed paper dust is discharged together with air from the suction nozzle 13a to the cyclone separator 13c. In this case, when the toilet roll W reaches the first inclined portion 1a, it rolls on the conveying surface 2a so as to come into contact with the partition wall 15 by the injection of air from the injection nozzle 12e and the inclination of the conveying surface 2a of the conveying conveyor 1. The paper dust can be removed more reliably. Similarly, when the toilet roll W reaches the second inclined portion 1b, the conveyance surface 2a is reversed so as to come into contact with the side wall portion 11a due to the injection of air from the injection nozzle 12e and the inclination of the conveyance surface 2a of the conveyance conveyor 1. Rolls in the direction, and paper dust can be reliably removed.

  In the embodiment described above, the system has been described as a system that transports two rows of toilet rolls W in parallel. However, it is a system that transports three or more rows of toilet rolls in parallel, or a system that transports only one row of toilet rolls. Needless to say, the present invention can also be applied. For example, the structure of a system for conveying four rows of toilet rolls in parallel is schematically shown in FIG. 7, but the same reference numerals are used for elements having the same functions as in the previous embodiment. The central partition wall 15C in the present embodiment also has a function as the side wall portion 11a of the frame body 11 in the previous embodiment. As shown in FIG. 7, a paper dust removing device 10 similar to that of the previous embodiment is configured symmetrically about the central partition wall 15C. The upper end of the central partition wall 15C has an integral structure connected to the upper wall portion 11b of the frame body 11, and part of the air pipes 12f and 13d are embedded in the partition wall 15C so as to be exposed from the lower end thereof. It has been pulled out.

  It should be noted that the present invention should be construed only from the matters described in the claims, and in the above-described embodiment, all the changes and modifications included in the concept of the present invention are other than those described. Is possible. For example, depending on the working environment, the paper dust suction means 13 can be omitted completely, and paper dust or the like may be blown out of the space 14 from the gap between the frame 11 and the conveyor 1. As described above, all matters in the above-described embodiment are not intended to limit the present invention, and include any configuration that is not directly related to the present invention, and are arbitrarily determined according to the use and purpose thereof. It can be changed.

W Toilet roll 1 Conveyor 1a 1st inclined part 1b 2nd inclined part 1c Non-inclined part 2 Belt 2a Conveying surface 3 Guide member 10 Paper dust removal apparatus 11 Frame 11a Side wall part 11b Upper wall part 12 Compressed air supply means 12a Injection Pump 12b check valve 12c pressure accumulation tank 12d pressure reducing valve 12e injection nozzle 12f air pipe 13 paper dust suction means 13a suction nozzle 13b suction pump 13c cyclone separator 13d air pipe 13e air outlet 14 space 15, 15C partition wall

Claims (5)

An apparatus for removing paper dust adhering to roll-like sanitary paper conveyed on a conveyor with the axis parallel to the conveyance direction,
A frame that surrounds the transport surface of the conveyor and defines a space through which rolled sanitary paper passes between the conveyor surface of the conveyor;
Compressed air supply means connected to the frame body for supplying compressed air to the space, the conveyor surface of the conveyor being inclined to one side in the width direction in the space, and its width A second inclined portion inclined to the other side in the direction,
The compressed air is supplied to the space so as to give the roll-like sanitary paper a rotational force in a direction in which the roll-like sanitary paper rolls by gravity along the inclination of the first or second inclined portion. Paper dust removing device characterized by.   2. The paper dust removing device according to claim 1, wherein the first inclined portion and the second inclined portion are alternately arranged along a conveyance direction of the roll-like sanitary paper.   The paper dust removing device according to claim 1, further comprising a non-inclined portion in which a conveyor surface of the conveyor is horizontal between the first inclined portion and the second inclined portion. .   The paper dust removing device according to any one of claims 1 to 3, further comprising a paper dust suction unit that is connected to the frame body and sucks the paper dust interposed in the space together with air.   5. The paper dust removing device according to claim 4, wherein the paper dust suction unit includes a separator that separates paper dust and air, and the compressed air supply unit is connected to an air outlet of the separator. apparatus.

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