JP2013169657A - Roll for sheet heating, single facer, and manufacturing device for corrugated cardboard sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll for sheet heating, a single facer, and a manufacturing device for corrugated cardboard sheet such that while sufficient roll rigidity is secured and high heating capability is secured, a heating medium can be suitably discharged.SOLUTION: A roll for sheet heating includes: a roll body 101 which is in a hollow cylinder shape and has rotary shaft portions 115, 116; a plurality of passages 102 for steam which are provided to the roll body 101 and passing steam therethrough to an outer peripheral portion 111; a supply portion 103 which can pressurize and supply steam from the rotary shaft portion 115 to one of the passages 102 for steam; a storage portion 104 which is provided to the end 112 of the roll body 101, and temporarily stores condensed water of steam discharged from the other of the passages 102 for steam; and a discharge portion 105 which has a discharge pipe 123 penetrating the rotary shaft portion 115 relatively rotatably and bent downward in a perpendicular direction in the roll body 101, and discharges the condensed water of steam stored in the storage portion 104 from the discharge pipe 123.

Description

  The present invention relates to a sheet heating roll for heating a sheet such as a corrugated cardboard sheet, a single facer for producing a single-faced corrugated sheet by bonding a liner to a corrugated core, and liners on both sides of the corrugated core. The present invention relates to a corrugated cardboard sheet producing apparatus for producing a double-faced corrugated cardboard sheet.

  A corrugating machine as a corrugated cardboard manufacturing apparatus includes a single facer that forms a single-sided cardboard sheet and a double facer that forms a double-sided cardboard sheet by laminating a front liner paper on the single-sided cardboard sheet. In a single facer, a core (core paper) supplied from a mill roll stand is processed into a corrugated shape, and a back liner supplied from another mill roll stand is bonded to form a single-sided cardboard sheet. The single-sided cardboard sheet formed by this single facer is sent to the bridge portion provided on the downstream side, and is sent to the downstream double facer according to the speed while being stored here. In the double facer, a double-sided cardboard sheet is formed by laminating a front liner sent from a mill roll stand separately provided on a single-sided cardboard sheet sent from the bridge portion. The double-sided corrugated cardboard sheet that has passed through the double facer is cut in the width direction by a cut-off device after a predetermined slit or ruled line is made in the transport direction by a slitter scorer, and is stacked on a stacker and sequentially discharged. The

  In the single facer in such a corrugated sheet manufacturing apparatus, the heated back liner is transferred to the nip portion between the pressure belt and the upper roll, while the heated core engages with the upper roll and the lower roll. After being processed into a wave shape at the top and glued to the top of each step, it is transferred to the nip between the pressure belt and the upper roll, so that this core is bonded to the back liner to form a single-sided cardboard sheet. The

  The upper and lower step rolls used for this single facer are configured as heating rolls because the core and the back liner need to be heated. Examples of conventional sheet heating rolls include those described in Patent Documents 1-3 below. The single facers described in Patent Documents 1 and 2 maintain the outer surface of the roll at a high temperature by ventilating high-pressure steam inside a hollow corrugated roll. Moreover, the grooved roll described in Patent Document 3 alternately forms a flow line for supplying a heating medium to the outer peripheral part and a return line for returning the heating medium in the circumferential direction, and a plurality of roll lines from the roll shaft end part. A heating medium is supplied through a flow line, this heating medium is returned through a plurality of return lines, and discharged from the end of the same roll shaft.

Japanese Patent Publication No. 60-052936 JP 2004-160951 A European Patent No. 0657275

  However, in Patent Documents 1 and 2, high pressure steam is ventilated inside the hollow corrugated roll to maintain the outer surface of the roll at a high temperature. However, in order to ensure a predetermined roll rigidity, the roll must have a predetermined thickness or more, and it becomes difficult for internal heat to be transmitted to the outer surface of the roll, and the sheet cannot be heated sufficiently. is there. Moreover, in patent document 3, a sheet | seat can fully be heated, after ensuring predetermined roll rigidity by making a heating medium flow through the several flow line formed in the outer peripheral part. However, since a plurality of return lines for returning the heating medium are provided on the outer periphery of the roll, and the discharge part for discharging the heating medium to the outside is in the center of the roll, the heating medium on which the centrifugal force acts by rotating is provided. It is difficult to move against the centrifugal force and discharge from the discharge part. Therefore, there is a problem that it is necessary to supply more heating media than necessary to a plurality of flow lines.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and is a sheet heating roll, a single facer, and corrugated cardboard that ensures adequate roll rigidity and ensures high heating capability while allowing proper discharge of the heating medium. It aims at providing the manufacturing apparatus of a sheet | seat.

  The roll for sheet heating of the present invention for achieving the above object has a roll body having a hollow cylindrical shape and rotating shaft portions at both ends in the roll axis direction, and an outer peripheral portion of the roll body in the roll axis direction. The heating medium can be pressurized and supplied from the rotating shaft portion to one of the longitudinal directions of the heating medium passage along a plurality of heating medium passages that are arranged in parallel in the circumferential direction of the roll along the circumference of the roll. A supply section, a storage section that is provided at an end of the roll body in the roll axis direction and temporarily stores the heating medium discharged from the other in the longitudinal direction of the heating medium passage, and the rotating shaft section. A discharge section that has a discharge pipe that penetrates in a relatively rotatable manner and is bent downward in the vertical direction inside the roll body, and discharges the heating medium stored in the storage section from the discharge pipe. The one in which the features.

  Therefore, when the heating medium is pressurized and supplied from the supply unit to one of the plurality of heating medium passages while the roll main body is rotating, the heating medium flows through each heating medium passage so that the surface of the roll main body is circulated. Becomes hot. And the heating medium which heated the roll main body is discharged | emitted from the other to the storage part, is temporarily stored, and is pumped and discharged | emitted outside through discharge piping. That is, by providing a plurality of heating medium passages on the outer periphery of the roll body and providing a storage section at the end of the roll body, sufficient roll rigidity can be ensured and high heating capacity can be ensured. In addition, the heating medium can be properly discharged from the discharge pipe by the internal pressure.

  In the sheet heating roll of the present invention, the storage section has a circumferential groove formed from the plurality of heating medium passages to the outside in the roll radial direction.

  Therefore, the heating medium discharged from the heating medium passage can be appropriately stored by making the storage portion a circumferential groove outside the heating medium passage.

  In the sheet heating roll according to the present invention, the outer periphery of the roll main body is disposed outside the plurality of heating medium passages in the roll radial direction along the roll axis direction and at a predetermined interval in the roll circumferential direction. A plurality of suction passages capable of applying a suction force, and a plurality of suction openings that are opened from the suction passages to the outer peripheral surface of the roll body are provided.

  Therefore, by providing a plurality of suction passages outside the heating medium passages on the outer periphery of the roll body, a large number of heating medium passages can be provided with sufficient roll rigidity, and the heating capacity Can be improved.

  In the sheet heating roll of the present invention, the plurality of heating medium passages and the plurality of suction passages are arranged so as to be shifted in the roll circumferential direction.

  Therefore, by disposing the heating medium passages and the suction passages in the roll circumferential direction, the heating medium passages can be arranged on the outer peripheral surface side of the roll body, thereby improving the heating capacity. it can.

  In the sheet heating roll of the present invention, the supply unit and the discharge unit are provided on the same rotary shaft unit in the roll body, and the supply unit including a ring-shaped passage is provided outside the discharge pipe. The supply section passes through the inside of the roll main body and communicates with one of the heating medium passages in the longitudinal direction, and the storage section is provided at an end portion on the supply section and the discharge section side. It is characterized by communicating with the other in the longitudinal direction of the passage.

  Therefore, by providing the supply unit and the discharge unit on the same rotating shaft unit, the heating medium supply system and the discharge system can be easily operated, and the apparatus can be simplified.

  In the sheet heating roll of the present invention, the supply unit and the discharge unit are provided on different rotating shafts in the roll body, and the supply unit is formed at the end on the supply unit side along the roll radial direction. Through the distribution passage, communicated with one of the heating medium passages in the longitudinal direction, and the storage portion is provided at an end on the discharge portion side and communicated with the other of the heating medium passages in the longitudinal direction. It is characterized by that.

  Therefore, the flow of the heating medium in the roll body is unidirectional, and the heating medium passage can be simplified.

  In the roll for heating a sheet according to the present invention, the storage section is divided into an end portion on the discharge section side by a partition wall with respect to the roll body.

  Therefore, by partitioning the storage portion at the end of the roll body with the partition wall, the flow area of the heating medium in the roll body can be reduced, and the supply amount of the heating medium at the start of heating can be reduced.

  In addition, the single facer of the present invention includes upper and lower corrugated rolls having corrugated outer peripheral surfaces that mesh with each other, forming a corrugated core, a gluing device that applies glue to the top of the corrugated core, and gluing In a single facer comprising a pressurizing device that pressurizes and joins the corrugated core and the liner together with one of the upper and lower corrugated rolls, the sheet heating roll is applied as the upper roll. It is characterized by that.

  Therefore, the core is transferred to the nips of the upper and lower corrugated rolls so that the meshed portion is processed into a wave shape and glued to each top of the corrugated section by a gluing device, and then the corrugated roll and the pressure device By being transferred in between, the corrugated core is bonded to the liner to produce a single-sided cardboard sheet. At this time, since the heating medium is pressurized and supplied to the heating medium passage of the rotating upper roll, the outer peripheral surface of the upper roll is at a high temperature, and when the core is processed into a wave shape, This core can be heated appropriately. The upper roll is provided with a plurality of heating medium passages at the outer peripheral portion and a storage portion at the end, thereby ensuring sufficient roll rigidity and ensuring high heating capability. It is possible to appropriately discharge the heating medium by providing a storage part for the heating medium at the end of the roll body and allowing the heating medium to be discharged from the discharge pipe by the internal pressure.

  The corrugated board manufacturing apparatus of the present invention includes a single facer for manufacturing a single-faced corrugated sheet by laminating a second liner to a corrugated core, and a single-faced corrugated sheet produced by the single facer. In a cardboard sheet manufacturing apparatus comprising a double facer for manufacturing a double-faced cardboard sheet by laminating a first liner on the center core side, the single facer has a corrugated outer surface meshing with each other, and has a corrugated core. The upper and lower corrugated rolls to be formed, the gluing device for applying glue to the step top of the corrugated core, and the corrugated core and the liner after gluing are pressed together with one of the upper and lower corrugated rolls. The sheet heating roll is applied as the upper roll.

  Accordingly, the single facer bonds the second liner to the corrugated core to manufacture the single-sided cardboard sheet D, and the double facer has the first face on the core side in the single-sided cardboard sheet manufactured by the single facer. A liner is laminated to produce a double-sided cardboard sheet E. At this time, since the heating medium is pressurized and supplied to the heating medium passage of the rotating upper roll by the single facer, the outer peripheral surface of the upper roll is at a high temperature, and the inner core is corrugated. This core can be heated appropriately when it is processed. The upper roll is provided with a plurality of heating medium passages at the outer peripheral portion and a storage portion at the end, thereby ensuring sufficient roll rigidity and ensuring high heating capability. It is possible to appropriately discharge the heating medium by providing a storage part for the heating medium at the end of the roll body and allowing the heating medium to be discharged from the discharge pipe by the internal pressure.

  According to the sheet heating roll, single facer, and corrugated sheet manufacturing apparatus of the present invention, a plurality of heating medium passages are provided in the outer peripheral portion of the roll main body, and a storage portion is provided at the end of the roll main body. Roll rigidity can be ensured and high heating capacity can be ensured. A heating medium reservoir is provided at the end of the roll body, and the heating medium can be discharged from the discharge pipe by internal pressure. This makes it possible to properly discharge the heating medium.

FIG. 1 is a cross-sectional view of an upper roll as a sheet heating roll according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a schematic diagram of a corrugated board sheet manufacturing apparatus according to the first embodiment. FIG. 5 is a schematic diagram illustrating a single facer unit according to the first embodiment. FIG. 6 is a cross-sectional view of an upper roll as a sheet heating roll according to Embodiment 2 of the present invention. FIG. 7 is a cross-sectional view of an upper roll as a sheet heating roll according to Embodiment 3 of the present invention.

  Exemplary embodiments of a sheet heating roll, a single facer, and a corrugated sheet manufacturing apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  1 is a cross-sectional view of an upper roll as a sheet heating roll according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 is a cross-sectional view taken along the line III-III in FIG. 1 showing the inside of the upper roll of Example 1, FIG. 4 is a schematic view of a corrugated sheet manufacturing apparatus of Example 1, and FIG. 5 shows the single facer portion of Example 1. FIG.

  In Example 1, as shown in FIG. 4, the corrugating machine 10 as a corrugated sheet manufacturing apparatus attaches a back liner C as a second liner to a corrugated core B to form a single-sided corrugated sheet D. A single facer 11 to be manufactured, and a double facer 12 to manufacture a double-sided cardboard sheet E by bonding a front liner A as a first liner to the core B side of the single-sided cardboard sheet D manufactured by the single facer 11. Have.

  The single facer 11 includes a mill roll stand 21 and a preheater (preheating device) 22 for the core B, a mill roll stand 23 and a preheater (preheating device) 24 for the back liner C, a single facer portion 25, and a bridge portion 26. And have. Further, the double facer 12 includes a mill roll stand 31 of the front liner A, a preheater (preheating device) 32, a glue machine 33, a double facer portion 34, a rotary shaft 35, a slitter scorer 36, a cut-off 37, and a stacker. 38.

  In the single facer 11, the mill roll stand 21 is provided with roll papers each having a core B wound in a roll shape on both sides, and a splicer 21 a for performing paper splicing is provided above the roll paper. . When paper is fed from one of the paper rolls, the other paper roll is mounted and paper splicing preparation is made. When the remaining base paper of one paper roll becomes small, the splicer 21a joins the base paper of the other paper roll. Then, while the base paper is being supplied from the other paper roll, one of the paper rolls is loaded to prepare for paper splicing. In this way, the base paper is sequentially spliced and continuously fed out from the mill roll stand 21 toward the downstream side.

  On the other hand, the mill roll stand 23 is provided with roll paper on which the back liner C is wound on both sides, and a splicer 23a for performing paper splicing is provided above the roll paper. When paper is fed from one of the paper rolls, the other paper roll is mounted and paper splicing preparation is made. When the remaining base paper of one paper roll becomes small, the splicer 23a joins the base paper of the other paper roll. Then, while the base paper is being supplied from the other paper roll, one of the paper rolls is loaded to prepare for paper splicing. In this way, the base paper is sequentially spliced and continuously fed out from the mill roll stand 23 toward the downstream side.

  The preheaters 22 and 24 preheat the core B and the back liner C, respectively. Each preheater 22 and 24 has a heating roll to which steam is supplied inside, and the base paper (core B, back liner C) continuously fed from the mill roll stands 21 and 23 is used as this heating roll. The base paper is heated to a predetermined temperature by being wound and conveyed.

  As shown in FIG. 5, the single facer portion 25 includes a pressure belt 43 wound around a belt roll 41 and a tension roll 42, and a surface formed in a wave shape so as to contact the pressure belt 43 in a pressurized state. It has an upper roll 44 (sheet heating roll) that is in contact with it, and a lower roll 45 that also has a wave-like surface and meshes with the upper roll 44. The back liner C heated by the preheater 24 is wound around the liner preheating roll 46 and preheated on the way, and then guided by the belt roll 41 and together with the pressure belt 43, the pressure belt 43 and the upper roll 44. It is transferred to the nip part. On the other hand, the core B heated by the preheater 22 is wrapped around the core preheating roll 47 and preheated on the way, and after being processed into a wave shape at the meshing portion between the upper roll 44 and the lower roll 45, It is guided by the upper roll 44 and transferred to the nip portion between the pressure belt 43 and the upper roll 44.

  A gluing device 48 is disposed in the vicinity of the upper roll 44. The gluing device 48 includes a gluing dam 49 that stores gluing, a gluing roll 50 that glues the core B conveyed by the upper roll 44, and a meter roll that adjusts the amount of gluing applied to the peripheral surface of the gluing roll 50. 51 and a glue scraping blade 52 that scrapes glue from the meter roll 51. The core B that has been fed at the meshing portion between the upper roll 44 and the lower roll 45 is glued to each top of the stage by the gluing roll 50, and is attached to the back liner C at the nip portion between the pressure belt 43 and the upper roll 44. A single-sided cardboard sheet D is formed by bonding.

  Returning to FIG. 4, a pick-up conveyor 53 is provided obliquely above and downstream of the single facer unit 25 in the conveying direction. The take-up conveyor 53 is composed of a pair of endless belts, and has a function of sandwiching the single-sided cardboard sheet D formed in the single facer portion 25 and transporting it to the bridge portion 26. The bridge portion 26 functions as a retaining portion for temporarily retaining the single-sided cardboard sheet D in order to absorb the speed difference between the single facer 11 and the double facer 12.

  In the double facer 12, the mill roll stand 31 is provided with roll paper on which the front liner A is wound on both sides, and a splicer 31a for performing paper splicing is provided above the mill roll stand 31. When paper is fed from one of the paper rolls, the other paper roll is mounted and paper splicing preparation is made. When the remaining base paper of one paper roll becomes small, the splicer 31a joins the base paper of the other paper roll. Then, while the base paper is being supplied from the other paper roll, one of the paper rolls is loaded to prepare for paper splicing. In this way, the base paper is sequentially spliced and continuously fed from the mill roll stand 31 toward the downstream side.

  The preheater 32 has a heating roll for the single-sided cardboard sheet D (hereinafter referred to as a single-stage sheet heating roll) 61 and a heating roll for the front liner A (hereinafter referred to as a front liner heating roll) 62. The single-stage sheet heating roll 61 has a winding amount adjusting device and is heated to a predetermined temperature by supplying steam therein, and the back liner C side of the single-sided cardboard sheet D is wound around the circumferential surface. The single-sided cardboard sheet D can be preheated. On the other hand, the front liner heating roll 62 similarly has a winding amount adjusting device and is heated to a predetermined temperature by supplying steam therein, and the front liner A is wound around the peripheral surface. The front liner A can be preheated.

  The glue machine 33 has a gluing device and a pressure device. The single-sided corrugated cardboard sheet D heated by the single-stage sheet heating roll 51 is guided in the glue machine 33 on the way, and glued to each top of the stage of the core B when passing between the rider roll and the gluing roll. Is done.

  The single-sided cardboard sheet D glued by the glue machine 33 is transferred to the double facer portion 34 in the next process. Further, the front liner A heated by the heating roll 52 is also transferred to the double facer unit 34 through the glue machine 33.

  The double facer portion 34 is divided into an upstream heating section 34a and a downstream cooling section 34b along the travel lines of the single-sided cardboard sheet D and the front liner A. The single-sided cardboard sheet D glued by the glue machine 33 is carried between the pressure belt 63 and the heating platen 64 by this heating section 34a, and the front liner A is placed on the core B side of the single-sided cardboard sheet D. Are carried between the pressure belt 63 and the heating plate 64 so as to overlap with each other. Then, after the single-sided cardboard sheet D and the front liner A are carried between the pressure belt 63 and the hot platen 64, the single-sided cardboard sheet D and the front liner A are integrally transferred toward the cooling section 34b in a state where they are overlapped vertically. During this transfer, the single-sided cardboard sheet D and the front liner A are heated while being pressed, so that they are bonded together to form a double-sided cardboard sheet E. The double-sided cardboard sheet E is naturally cooled when being conveyed while being sandwiched between the pressure belt 63 and the conveyance belt 65 in the cooling section 34b.

  The double-faced cardboard sheet E manufactured by the double facer 34 is transferred to the rotary 35. The rotary 35 cuts the double-sided corrugated cardboard sheet E in the width direction in full width or partially. The slitter scorer 36 cuts a wide double-sided corrugated cardboard sheet E so as to have a predetermined width in the transport direction, and processes ruled lines extending in the transport direction. The slitter scorer 36 includes a first slitter scorer unit 36a and a second slitter scorer unit 36b, which are arranged along the conveying direction of the double-faced cardboard sheet E and have substantially the same structure. The first slitter scorer unit 36a includes a plurality of sets of upper ruled line rolls and lower ruled line rolls arranged opposite to each other with the double-sided cardboard sheet E interposed therebetween. On the other hand, the second slitter scorer unit 36b has a plurality of sets of upper slitter knives and lower slitter knives arranged opposite to each other with the double-faced cardboard sheet E interposed therebetween.

  The cut-off 37 cuts the double-sided corrugated cardboard sheet E cut in the transport direction by the slitter scorer 36 in the width direction to form a plate shape. The cut-off 37 is a slitter scorer 36 that receives and processes two double-sided corrugated cardboard sheets E cut into a predetermined width along the conveying direction in two upper and lower stages, and both have substantially the same configuration. It has become. The stacker 38 is a stack of double-sided corrugated cardboard sheets cut by the cut-off 37 and discharged as a product outside the machine.

  Here, in the single facer 11, the upper stage roll 44 which comprises the single facer part 25 is demonstrated in detail.

  As shown in FIGS. 1 to 3, the upper roll 44 includes a roll body 101, a plurality of steam passages (heating medium passages) 102, a supply unit 103, a storage unit 104, and a discharge unit 105. doing.

  Since the roll main body 101 has a hollow cylindrical shape, the outer peripheral portion 111 having a cylindrical shape and the two end portions 112.113 having a disk shape are integrally joined to form a hollow inside. A portion 114 is formed. The roll body 101 has rotating shaft portions 115 and 116 formed at the end portions 112.113 in the roll axis direction. That is, the roll main body 101 is rotatably supported with the respective rotating shafts 115 and 116 supported by a frame (not shown).

  The roll body 101 is provided with a plurality of steam passages 102 on the outer peripheral portion 111. The plurality of steam passages 102 are passages through which steam as a heating medium can flow. The steam passages 102 are arranged along the roll axis direction of the roll body 101 and at equal intervals (predetermined intervals) in the roll circumferential direction. Each end portion in the longitudinal direction communicates with the hollow portion 114.

  In addition, the roll body 101 is provided with a reservoir 104 at one end 112. The storage portion 104 has a circumferential groove 121 formed from each steam passage 102 to the outside in the roll radial direction, and is formed as a chamber that communicates with the hollow portion 114 as a whole. The storage unit 104 temporarily stores the condensed water of the steam discharged from each steam passage 102.

  In the roll body 101, a supply unit 103 and a discharge unit 105 are provided on one rotating shaft unit 115. That is, a through hole 122 is formed at the center of the rotating shaft 115, and a discharge pipe 123 having a smaller diameter than the through hole 122 is inserted into the through hole 122. Therefore, a supply path having a ring shape that configures the supply unit 103 is provided between the inner surface of the through hole 122 and the outer surface of the discharge pipe 123. On the other hand, the discharge pipe 123 passes through the through hole 122 so as to be relatively rotatable with respect to the rotation shaft portion 115, is bent downward in the vertical direction inside the roll body 101, and has a lower end portion in the storage portion 104. Is extended to the circumferential groove 121. The discharge pipe 123 is supported so as not to rotate outside the roll body 101.

  Therefore, the supply section (supply path) 103 is connected to a steam pipe (not shown) that supplies steam outside the roll body 101, and can supply the pressurized steam to the hollow portion 114 of the roll body 101. The supply unit 103 communicates with one of the steam passages 102 in the longitudinal direction (right side in FIG. 1) through the hollow portion 114 of the roll body 101, and can supply steam to the steam passage 102. . In this case, the roll body 101 is formed with a circumferential groove 124 formed at the other end 113 from the steam passages 102 to the outside in the roll radial direction, similarly to the circumferential groove 121 of the storage unit 104. The hollow portion 114 of the roll body 101 communicates with each steam passage 102 via a circumferential groove 124.

  Further, the discharge unit 105 communicates with the circumferential groove 121 of the storage unit 104 through the discharge pipe 123, and the storage unit 104 communicates with the other in the longitudinal direction of the steam passage 102 (left side in FIG. 1). ing. Therefore, the circumferential groove 121 of the storage unit 104 can store the condensed water of the steam that has been cooled by circulating the steam passage 102 and heating the outer periphery of the roll body 101. The discharge unit 105 is connected to a condensed water pipe (not shown) that discharges condensed water outside the roll body 101. And since the storage part 104 is connected to the hollow part 114 of the roll main body 101, it is pressurized to a predetermined pressure higher than the outside air, and the discharge part 105 is stored in the circumferential groove 121 of the storage part 104. The steam condensed water can be pushed out from the discharge pipe 123 to the condensed water pipe and discharged.

  Further, the roll body 101 is provided with a plurality of suction passages 131 on the outer peripheral portion 111. The plurality of suction passages 131 are passages for applying a suction force, and are arranged in parallel at equal intervals (predetermined intervals) in the roll circumferential direction along the roll axis direction of the roll body 101. In this case, the plurality of suction passages 131 are provided on the outer peripheral portion 111 of the roll body 101 on the outer side in the roll radial direction from the plurality of steam passages 102, and in the roll circumferential direction with the plurality of steam passages 102. They are offset. The plurality of suction passages 131 communicate with a number of suction openings 132 formed in the outer peripheral portion 111 of the roll body 101.

  Therefore, a plurality of suction passages 131 are connected to suction pipes at their ends via headers (not shown). By applying a suction force to the plurality of suction passages 131 via the suction pipes, The force acts on the outer peripheral surface of the roll main body 101 where a large number of suction openings 132 are open. That is, the upper roll 44 always applies a suction force from the suction passage 131 to the outer surface through the plurality of suction passages 131 during rotation. Therefore, when the upper roll 44 molds the core B into a corrugated shape, the core B is sucked (adsorbed) on the outer surface, so that the core B is pulled by the centrifugal force generated when the upper roll 44 rotates. The center core B formed into the corrugated shape can be prevented from returning to the original state (flat state).

  In this embodiment, the upper roll 44 is formed as a corrugated portion with the lower roll 45 as described above, and is not shown in the figure. An uneven portion is formed on the outer peripheral surface along the circumferential direction, and a large number of suction openings 132 are opened on the surface of the uneven portion.

  Here, the operation of the upper roll 44 of this embodiment will be described. When the roll body 101 is rotating in the upper roll 44, when the steam is pressurized and supplied from the supply unit 103 to the hollow portion 114, the vapor moves in the hollow portion 114 in the axial direction, and the end portion 113 side To the respective steam passages 102. And since the outer periphery 111 of the roll main body 101 is heated because a vapor | steam distribute | circulates each channel | path 102 for vapor | steam, the outer surface becomes high temperature. The temperature of the steam flowing through each of the steam passages 102 decreases, and part of the steam becomes condensed water and is discharged from the end portion 112 side to the storage portion 104 and temporarily stored in the circumferential groove 121. In this case, since the main body roll 101 is rotating, the condensed water S of steam is uniformly stored in the bottom of the circumferential groove 121. Since the steam is supplied under pressure from the supply unit 103, the pressure of the storage unit 104 is maintained higher than the atmospheric pressure, and the condensed water stored in the circumferential groove 121 is discharged by the siphon effect. It is pumped to the outside through the discharge pipe 123 of the section 105 and discharged.

  As described above, in the upper roll 44 of the first embodiment, the roll main body 101 having a hollow cylindrical shape and having the rotating shaft portions 115 and 116, and the steam provided to the roll main body 101 can circulate steam to the outer peripheral portion 111. A plurality of steam passages 102, a supply portion 103 capable of pressurizing and supplying steam to one of the steam passages 102 from the rotary shaft portion 115, and an end portion 112 of the roll main body 101 provided from the other end of the steam passage 102. It has a storage part 104 for temporarily storing condensed water of discharged steam, and a discharge pipe 123 that penetrates the rotation shaft part 115 so as to be relatively rotatable and bends downward in the vertical direction inside the roll body 101. A discharge unit 105 that discharges the condensed water of the steam stored in the storage unit 104 from the discharge pipe 123 is provided.

  Accordingly, when steam is pressurized and supplied from the supply unit 103 to one of the plurality of steam passages 102 while the roll body 101 is rotating, the steam flows through each of the steam passages 102 so that the roll body 101 The surface becomes hot. And the steam which heated the roll main body 101 becomes condensed water, is discharged | emitted from the other to the storage part 104, is temporarily stored, and is pumped and discharged | emitted through the discharge piping 123 outside. The upper roll 44 is provided with a plurality of steam passages 102 on the outer peripheral portion of the roll main body 101 and the storage portion 104 is provided at the end 112 of the roll main body 101, so that sufficient roll rigidity can be ensured. High heating capacity can be ensured, and condensed water of steam can be properly discharged from the discharge pipe 123 by the internal pressure.

  That is, the upper roll 44 is provided with a plurality of steam passages 102 in the outer peripheral portion 111 of the roll body 101 and heats the outer peripheral surface of the roll to a high temperature. While being able to ensure, the core B can be heated appropriately by arrange | positioning the channel | path 102 for vapor | steams in the position near a roll outer peripheral surface. Moreover, since the storage part 104 (circumferential groove 121) which once stores the condensed water of the steam discharged from each steam passage 102 is provided at the end 112 of the roll body 101, the rigidity at the outer peripheral part 111 is increased. In this respect, high roll rigidity can be ensured.

  Further, in the discharge portion 105, the discharge pipe 123 penetrates the rotation shaft portion 115 so as to be relatively rotatable, is bent downward in the vertical direction inside the roll body 101, and extends to the circumferential groove 121. The discharge pipe 123 does not rotate with respect to the rotating roll body 101, and the condensed water of the steam stored in the circumferential groove 121 can be pumped out from the discharge pipe 123 to be discharged. Therefore, it is not necessary to increase the supply amount of steam supplied to the inside of the roll main body 101, and condensed water can be discharged.

  Moreover, in the upper stage roll 44 of Example 1, the storage part 104 is used as the circumferential groove 121 formed from the plurality of steam passages 102 to the outside in the roll radial direction. Therefore, the condensed water of the steam discharged from each steam passage 102 during the rotation of the main body roll 101 can be stored in the bottom of the circumferential groove 121 by the centrifugal force, and the condensed water stored in the circumferential groove 121. Can be appropriately discharged from the discharge pipe 123 to the outside.

  In the upper roll 44 of the first embodiment, a plurality of suction passages 131 capable of acting a suction force on the outer peripheral portion 111 of the roll main body 101 and outside the steam passages 102 in the roll radial direction are provided. A plurality of suction openings 132 opened from the suction passage 131 to the outer peripheral surface of the roll body 101 are provided. Therefore, by providing a plurality of suction passages 131 outside the steam passages 102 on the outer peripheral portion 111 of the roll body, it is possible to provide a large number of steam passages 102 while ensuring sufficient roll rigidity. Heating capacity can be improved.

  In the upper roll 44 of the first embodiment, the plurality of steam passages 102 and the plurality of suction passages 131 are shifted in the roll circumferential direction. Therefore, each steam passage 102 can be arranged on the outer peripheral surface side of the roll body 101, and the heating capacity can be improved.

  Further, in the upper roll 44 of the first embodiment, the supply unit 103 and the discharge unit 105 are provided on the same rotating shaft unit 115 in the roll body 101, and the supply unit 103 including a ring-shaped passage is provided outside the discharge pipe 123. The portion 103 communicates with one of the steam passages 102 through the hollow portion 114 of the roll body 101, the storage portion 104 is provided at the end portion 112 on the supply portion 103 and discharge portion 105 side, and communicates with the other of the steam passage 102. I am letting. Therefore, since the supply unit 103 and the discharge unit 105 are provided on the same rotating shaft unit 115, the steam supply system and the discharge system can be easily operated, and the apparatus can be simplified. .

  In the corrugated cardboard manufacturing apparatus 10 and the single facer 11 according to the first embodiment, by using the upper roll 44, sufficient roll rigidity can be secured and high heating ability can be secured. Therefore, the double-faced corrugated cardboard sheet E can be manufactured at a high speed, and the productivity can be improved.

  FIG. 6 is a cross-sectional view of an upper roll as a sheet heating roll according to Embodiment 2 of the present invention.

  In Example 2, as shown in FIG. 6, the upper roll 200 includes a roll body 201, a plurality of steam passages (heating medium passages) 202, a supply unit 203, and a storage unit, as shown in FIG. 6. 204 and a discharge unit 205.

  Since the roll body 201 has a hollow cylindrical shape, the outer peripheral portion 211 having a cylindrical shape and the two end portions 212.213 having a disk shape are integrally joined to form a hollow inside. A portion 214 is formed. The roll body 201 is formed with rotating shaft portions 215 and 216 at each end portion 212.213 in the roll axis direction. That is, the roll main body 201 is rotatably supported by the rotation shaft portions 215 and 216 supported by a frame (not shown).

  The roll main body 201 is provided with a plurality of steam passages 202 on the outer peripheral portion 211. The plurality of steam passages 202 are passages through which steam as a heating medium can flow, and are arranged in parallel at equal intervals (predetermined intervals) in the roll circumferential direction along the roll axis direction of the roll body 201. .

  In the roll body 201, a supply unit 203 is provided on one rotating shaft part 216, and a discharge unit 205 is provided on the other rotating shaft part 215. That is, the supply unit 203 is a through hole formed in the central portion of the rotating shaft unit 216, and the supply unit (through hole) 203 is formed in one end 213 along the roll radial direction. It communicates with one side in the longitudinal direction of each steam passage 202 through the distribution passage 221. That is, the plurality of distribution passages 221 are formed in a radial shape at the end portion 213 of the roll body 201, and the base end portions on the radial center side are gathered to communicate with the supply portion (through hole) 203. In addition, the tip portions on the outside in the radial direction are communicated with the steam passages 202, respectively.

  In addition, the roll body 201 is provided with a storage portion 204 at the other end portion 212. The storage portion 204 has a circumferential groove 222 formed from the steam passages 202 to the outside in the roll radial direction, and is formed as a chamber that is separated from the hollow portion 214 by a partition wall 223. . The storage unit 204 temporarily stores the condensed water of the steam discharged from each steam passage 202, and the other of the steam passages 202 in the longitudinal direction communicates therewith. Further, the discharge pipe 224 constituting the discharge unit 205 penetrates so as to be relatively rotatable with respect to the rotation shaft unit 215, and is bent downward in the vertical direction in the storage unit 204 of the roll body 201. A lower end portion extends to the circumferential groove 222 of the storage portion 204. The discharge pipe 224 is supported so as not to rotate outside the roll body 201.

  Therefore, the supply section (supply path) 203 is connected to a steam pipe (not shown) for supplying steam outside the roll body 201, and one of the steam passages 202 in the longitudinal direction (see FIG. 6) via the plurality of distribution passages 221. The steam can be pressurized and supplied to the steam passage 202 through the distribution passage 221.

  Further, the discharge part 205 communicates with the circumferential groove 222 of the storage part 204 through the discharge pipe 224, and this storage part 204 is communicated with the other in the longitudinal direction of the steam passage 202 (left side in FIG. 6). ing. Therefore, the circumferential groove 222 of the storage part 204 can store the condensed water of the steam cooled by circulating the steam passage 202 and heating the outer peripheral part of the roll body 201. The discharge unit 205 is connected to a condensed water pipe (not shown) that discharges condensed water outside the roll body 201. Since the storage unit 204 communicates with the steam passage 202, the storage unit 204 is pressurized to a predetermined pressure higher than the outside air, and the discharge unit 205 is steam that accumulates in the circumferential groove 222 of the storage unit 204. The condensed water can be pushed out from the discharge pipe 224 to the condensed water pipe and discharged.

  Further, the roll body 201 is provided with a plurality of suction passages 231 on the outer peripheral portion 211. The plurality of suction passages 231 are passages for applying a suction force, and are arranged in parallel along the roll axis direction of the roll body 201 and at equal intervals (predetermined intervals) in the roll circumferential direction. In this case, the plurality of suction passages 231 are provided on the outer peripheral portion 211 of the roll body 201 on the outer side in the roll radial direction from the plurality of steam passages 202, and in the roll circumferential direction with the plurality of steam passages 202. They are offset. The plurality of suction passages 231 communicate with a number of suction openings (not shown) formed in the outer peripheral portion 211 of the roll body 201.

  Therefore, a plurality of suction passages 231 are connected to suction pipes at their ends via headers (not shown). By applying a suction force to the plurality of suction passages 231 via these suction pipes, The force acts on the outer peripheral surface of the roll main body 201 where many suction openings are open. That is, the upper roll 44 always applies a suction force from the suction passage 131 to the outer surface through the plurality of suction passages 131 during rotation. Therefore, when the upper roll 44 molds the core B into a corrugated shape, the core B is sucked (adsorbed) on the outer surface, so that the core B is pulled by the centrifugal force generated when the upper roll 44 rotates. The center core B formed into the corrugated shape can be prevented from returning to the original state (flat state).

  Here, the operation of the upper roll 200 of this embodiment will be described. When the roll body 201 is rotating in the upper roll 200, when steam is supplied under pressure from the supply unit 203, this steam is supplied to each steam passage 202 through each distribution passage 221. Then, when the steam flows through each steam passage 202, the outer surface 211 of the roll body 201 is heated and the outer surface becomes high temperature. The temperature of the steam flowing through each of the steam passages 202 decreases, and part of the steam becomes condensed water and is discharged from the end portion 212 side to the storage portion 204 and temporarily stored in the circumferential groove 222. In this case, since the main body roll 201 is rotating, the condensed water S of steam is uniformly stored at the bottom of the circumferential groove 222. And since the vapor | steam is pressurized and supplied from the supply part 203, the storage part 204 is maintaining the pressure higher than atmospheric pressure, and the condensed water stored by the circumferential groove | channel 222 is discharged | emitted by the siphon effect. It is pumped to the outside through the discharge pipe 224 of the section 205 and discharged.

  As described above, in the upper roll 200 of the second embodiment, the roll main body 201 having a hollow cylindrical shape and having the rotating shaft portions 215 and 216, and the steam provided to the roll main body 201 can flow steam to the outer peripheral portion 211. A plurality of steam passages 202, a supply portion 203 capable of pressurizing and supplying steam to one of the steam passages 202 from the rotary shaft portion 216, and an end 212 of the roll body 201 provided from the other end of the steam passage 202. The storage unit 204 has a storage unit 204 that temporarily stores condensed water of discharged steam, and a discharge pipe 224 that penetrates the rotation shaft unit 215 so as to be relatively rotatable and bends downward in the vertical direction in the storage unit 204. A discharge unit 205 for discharging the condensed water of the steam stored in 204 from the discharge pipe 224 is provided.

  Accordingly, when the steam is pressurized and supplied from the supply unit 203 to one of the plurality of steam passages 202 in a state where the roll body 201 is rotating, The surface becomes hot. And the steam which heated the roll main body 201 becomes condensed water, and is discharged | emitted from the other to the storage part 204, is temporarily stored, and is pumped and discharged | emitted through the discharge piping 224 outside. In this upper roll 200, a plurality of steam passages 202 are provided in the outer peripheral portion of the roll main body 201, and the storage portion 204 is provided in the end 212 of the roll main body 201, so that sufficient roll rigidity can be ensured. High heating capacity can be ensured, and condensed water can be properly discharged from the discharge pipe 224 by the internal pressure.

  Further, in the upper stage roll 200 of the second embodiment, the supply unit 203 is provided on one rotating shaft part 216 in the roll body 201, the discharge unit 205 is provided on the other rotating shaft part 216 in the roll body 201, and the supply unit 203 is a roll. A plurality of distribution passages 221 formed along the radial direction communicate with one of the steam passages 202, a storage portion 204 is provided at an end 212 on the discharge portion 205 side, and communicates with the other of the steam passages 202. Yes. Therefore, the flow of steam in the roll body 201 is unidirectional, and the steam passage 202 can be simplified.

  Further, in the upper roll 200 of the second embodiment, the storage unit 204 is partitioned at the end on the discharge unit 205 side by the partition wall 223 with respect to the hollow part 214 of the roll body 201. Therefore, the flow region of the steam in the roll body 201 can be reduced, and the amount of steam supplied at the start of heating can be reduced.

  FIG. 7 is a cross-sectional view of an upper roll as a sheet heating roll according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as Example 2 mentioned above, and detailed description is abbreviate | omitted.

  In Example 3, as shown in FIG. 7, the upper roll 300 includes a roll body 201, a plurality of steam passages 202, a supply unit 203, a storage unit 301, and a discharge unit 205, as shown in FIG. 7. And have.

  The roll body 201 has a hollow cylindrical shape, has an outer peripheral portion 211 and two end portions 212.213, and has a hollow portion 214 formed therein, and rotary shaft portions 215, 216 at the respective end portions 212.213. Is formed. The roll body 201 is provided with a plurality of steam passages 202 on the outer peripheral portion 211. In the roll body 201, a supply unit 203 is provided on one rotating shaft part 216, and a discharge unit 205 is provided on the other rotating shaft part 215.

  In addition, the roll body 201 is provided with a storage portion 301 at the other end portion 212. The storage portion 301 has a circumferential groove 222 formed from each steam passage 202 to the outer side in the roll radial direction, and is formed as a chamber that communicates with the hollow portion 214 as a whole. The reservoir 301 temporarily stores the condensed water of the steam discharged from each steam passage 202, and the other in the longitudinal direction of each steam passage 202 communicates.

  Here, the operation of the upper roll 300 of this embodiment will be described. When the roll body 201 is rotating in the upper roll 300, when steam is supplied under pressure from the supply unit 203, this steam is supplied to each steam passage 202 through each distribution passage 221. Then, when the steam flows through each steam passage 202, the outer surface 211 of the roll body 201 is heated and the outer surface becomes high temperature. The temperature of the steam flowing through each steam passage 202 decreases, and part of the steam becomes condensed water and is discharged from the end portion 212 side to the storage portion 301 and temporarily stored in the circumferential groove 222. In this case, since the main body roll 201 is rotating, the condensed water S of steam is uniformly stored at the bottom of the circumferential groove 222. And since the vapor | steam is pressurized and supplied from the supply part 203, the storage part 301 is maintaining the pressure higher than atmospheric pressure, and the condensed water stored in the circumferential groove | channel 222 is discharged | emitted by the siphon effect. It is pumped to the outside through the discharge pipe 224 of the section 205 and discharged.

  As described above, in the upper roll 300 of the third embodiment, the roll body 201 has a hollow cylindrical shape and the hollow portion 214 is provided, and the condensed water of the steam discharged from the steam passage 202 at the end 112 of the roll body 201. Is stored temporarily, and the hollow portion 214 is in communication with the storage portion 301.

  Therefore, by providing the storage portion 301 as a part of the hollow portion 214, the structure can be simplified and the manufacturing cost can be reduced without the need for a partition wall or the like.

  In each of the above-described embodiments, the sheet heating roll of the present invention is applied to the upper roll 44 of the single facer section 25, but is not limited to this application location. For example, it can be applied to a roll for heating a sheet, such as a lower roll 45, a liner preheating roll 46, a core preheating roll 47, or heating rolls of the preheaters 22, 24, 32. Further, the sheet is not limited to a corrugated cardboard sheet, and may be a printing paper or the like.

  Moreover, in each Example mentioned above, although the single facer part 25 was made into the pressure belt system, it is good also as a pressure roll system. That is, an upper roll and a lower roll having a corrugated groove and a pressure roll are arranged in series vertically and a gluing roll is provided on the lower roll. Then, the core is formed into a corrugated shape through the nips of the upper and lower corrugated rolls, applied to the top of the corrugated core with a gluing roll, and the back liner supplied to the pressure roll is glued together with the corrugated corrugated core A single-sided cardboard sheet may be produced by applying pressure through the nip portion between the lower roll and the pressure roll.

DESCRIPTION OF SYMBOLS 10 Corrugated sheet manufacturing apparatus 11 Single facer 12 Double facer 21 Mill roll stand 22 Preheater 23 Mill roll stand 24 Preheater 25 Single facer part 26 Bridge part 31 Mill roll stand 32 Preheater 33 Glue machine 34 Double facer part 35 Rotary shaft 36 Slitter scorer 37 Cut-off 38 Stacker 44, 200, 300 Upper roll (sheet heating roll)
45 Lower roll 101, 201 Roll body 102, 202 Steam passage (heating medium passage)
103, 203 Supply section 104, 204, 301 Storage section 105, 205 Discharge section 115.116, 215, 216 Rotating shaft section 121, 222 Circumferential groove 123, 224 Discharge pipe 131, 231 Suction passage 132 Suction opening section 221 Distribution Passage 223 Partition A Front liner (first liner)
B Core C Back liner (second liner)
D Single-sided cardboard sheet E Double-sided cardboard sheet

Claims (9)

A roll body having a hollow cylindrical shape and having rotating shaft portions at both ends in the roll axial direction;
A plurality of heating medium passages that are arranged along the roll axis direction at the outer peripheral portion of the roll body and arranged in parallel at a predetermined interval in the roll circumferential direction, and are capable of circulating the heating medium,
A supply unit capable of pressurizing and supplying a heating medium from the rotating shaft to one of the longitudinal directions in the heating medium passage;
A storage section that is provided at an end of the roll body in the roll axis direction and temporarily stores the heating medium discharged from the other in the longitudinal direction of the heating medium passage;
A discharge portion that has a discharge pipe that penetrates the rotation shaft portion so as to be relatively rotatable and is bent downward in the vertical direction inside the roll body, and discharges the heating medium stored in the storage portion from the discharge pipe; ,
A sheet heating roll comprising:   2. The sheet heating roll according to claim 1, wherein the storage section includes a circumferential groove formed from the plurality of heating medium passages to an outer side in a roll radial direction.   A plurality of suctions that are arranged on the outer periphery of the roll body along the roll axis direction outside the plurality of heating medium passages in the roll radial direction and are arranged in parallel at predetermined intervals in the roll circumferential direction. The sheet heating roll according to claim 1, wherein a plurality of suction openings are provided to open to the outer peripheral surface of the roll body from the suction passage and the suction passage.   The sheet heating roll according to claim 3, wherein the plurality of heating medium passages and the plurality of suction passages are arranged so as to be shifted in a roll circumferential direction.   The supply unit and the discharge unit are provided in the same rotating shaft portion in the roll body, the supply unit including a ring-shaped passage is provided outside the discharge pipe, and the supply unit is provided inside the roll body. And is connected to one end in the longitudinal direction of the passage for the heating medium, and the storage portion is provided at an end portion on the supply portion and the discharge portion side, and is communicated with the other in the longitudinal direction in the passage for the heating medium. The sheet heating roll according to any one of claims 1 to 4, wherein the sheet heating roll is provided.   The supply unit and the discharge unit are provided in different rotating shafts in the roll body, and the supply unit passes through the distribution passage formed along the roll radial direction at the end on the supply unit side. 2. The medium passage is connected to one side in a longitudinal direction, and the storage portion is provided at an end portion on the discharge portion side, and is communicated with the other in the longitudinal direction of the heating medium passage. To 4. The sheet heating roll according to any one of items 1 to 4.   The sheet heating roll according to claim 6, wherein the storage unit is partitioned at an end on the discharge unit side by a partition wall with respect to the roll main body. Upper and lower corrugated rolls having corrugated outer peripheral surfaces that mesh with each other to form a corrugated core;
A gluing device that applies glue to the top of the corrugated core;
A pressurizing device for pressurizing and joining the corrugated core and the liner after pasting together with either one of the upper and lower corrugated rolls;
In single facer with
The sheet heating roll according to any one of claims 1 to 7 is applied as the upper roll.
Single facer characterized by that. A single facer for producing a single-sided cardboard sheet by laminating a second liner to a corrugated core;
A double facer for producing a double-sided cardboard sheet by laminating a first liner on the center side of the single-sided cardboard sheet produced by the single facer;
In a cardboard sheet manufacturing apparatus comprising:
The single facer is
Upper and lower corrugated rolls having corrugated outer peripheral surfaces that mesh with each other to form a corrugated core;
A gluing device that applies glue to the top of the corrugated core;
A pressurizing device that pressurizes and joins the corrugated core and the liner after pasting together with either one of the upper and lower corrugated rolls;
The sheet heating roll according to any one of claims 1 to 7 is applied as the upper roll.
An apparatus for producing a corrugated cardboard sheet.

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