JP2006096009A - Device for manufacturing plural double-faced corrugated fiberboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for manufacturing a plural double-faced corrugated fiberboard capable of preventing the top parts of the corrugations of corrugating mediums from crushing and also allowing the top parts of the corrugations of the corrugating mediums to be synchronized each other when they are bonded together, thereby to further increase the strength of a plural double-faced corrugated fiberboard sheet. <P>SOLUTION: The device is provided with 1st and 2nd corrugating rolls 11, 12 which engage with each other and corrugate a 1st corrugating medium 2, and a 3rd and a 4th corrugating rolls 31, 32 which engage with each other and corrugate a 2nd corrugating medium 4, and constituted so that the 2nd corrugating roll 12 and the 3rd corrugating roll 31 rotate while synchronizing each other the top parts of their waveform surfaces, and so that an intermediate liner 3 is inserted between the 1st corrugating material 2 corrugated and wound on the 2nd corrugating roll 12 and the 2nd corrugating material 4 corrugated and wound on the 3rd corrugating roll 31 and so that the respective top parts of the 1st corrugating material 2 and the 2nd corrugating material 4 are pressed to the intermediate liner 3 and bonded together. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a double-sided corrugated board manufacturing method suitable for use in manufacturing a double-sided corrugated board sheet having a five-layer structure of a back liner, a stepped core, an intermediate liner, a stepped core, and a front liner. It relates to the device.

  Conventionally, as shown in FIG. 5, a special corrugated cardboard sheet 506 formed by bonding a liner 501, an intermediate core 502, an intermediate liner 503, an intermediate core 504, and a liner 505 is known. This corrugated cardboard sheet 506 has a structure in which the surface on the center side of the single-sided corrugated cardboard sheet (that is, the stepped portion of the core) is bonded to one surface of the double-sided corrugated cardboard sheet, and is called a double-sided corrugated cardboard sheet. The A double-sided cardboard manufacturing apparatus for manufacturing such a double-sided cardboard sheet 506 is disclosed in Patent Document 1 and Patent Document 2, for example.

  For example, in the double-sided corrugated board manufacturing apparatus described in Patent Document 1, a liner 501 and a corrugated core 502 are first bonded to form a single-sided corrugated cardboard sheet, and a liner 505 and a corrugated core 504 are provided. A single-sided corrugated cardboard sheet is formed by pasting together, and then the cores 502 and 504 of the two single-sided corrugated cardboard sheets are pasted together via an intermediate liner 503 to form a double-sided corrugated cardboard sheet 506.

  In the double-sided corrugated board manufacturing apparatus described in Patent Document 2, the intermediate liner 503 and the corrugated middle core 502 are first bonded to form a single-sided cardboard sheet, and then the single-sided cardboard sheet intermediate liner 503. The laminated core 504 is bonded together, and then the liner 501 is bonded to the intermediate core 502 and the liner 505 is bonded to the intermediate core 504 to form the double-sided cardboard sheet 506.

The double-sided corrugated cardboard sheet 506 is weak in strength if the position of the step top of the center core 502 and the step top of the center core 504 are slightly shifted in the conveying direction of the intermediate liner 503. In the double-sided corrugated board manufacturing apparatus described in 2, the step top of the center core 502 and the step top of the center core 504 are bonded (tuned) to each other at the same position in the transport direction of the intermediate liner 503.
Special table 2002-518227 gazette JP 2000-62054 A

  By the way, the double-sided corrugated board manufacturing apparatus described in Patent Document 1 described above uses a single-sided corrugated cardboard sheet composed of a liner 501 and a core 502 and a single-sided corrugated cardboard sheet composed of an intermediate liner 503 and a core 504 for a plurality of transport rolls. It is configured to be conveyed to the subsequent process while being wound, but in these plural conveying rolls, a stepped conveying roll whose surface is formed in a corrugated shape (substantially the same structure as a step roll that steps the core) And a single-sided corrugated cardboard sheet is wound around the corrugated surface of such a stepped transport roll so as to be transported.

  For this reason, when a position shift has occurred between the step top of the center core 502 of the single-sided cardboard sheet or the step top of the center core 504 and the stepped transport roll, the single-sided cardboard sheet passes through the stepped transport roll. The step tops of the center core 502 and the center core 504 may not follow the corrugated surface of the stepped transport roll, and the step tops of the center core 502 and the center core 504 may be crushed. The double-sided corrugated cardboard sheet 506 formed in such a state that the step tops of the center core 502 and the center core 504 are crushed has a problem that the strength is weak and a high-quality product cannot be manufactured.

  Further, the double-sided corrugated board manufacturing apparatus described in Patent Document 2 is configured such that when the core 504 is bonded to a single-sided cardboard sheet composed of an intermediate liner 503 and a center core 502, the single-sided corrugated cardboard sheet has a stepped transport roll as described above (patent The core 504 is bonded in a state of being wound around a joint formation timing roll in Document 2, but at this time, the step top of the core 502 of the single-sided cardboard sheet and the stepped conveyance If there is misalignment with the roll, when the single-sided corrugated sheet passes through the stepped conveyance roll, the step top of the core 502 does not follow the corrugated surface of the stepped conveyance roll, and the step top of the core 502 is It may be crushed. Thereby, like the technique of patent document 1, the intensity | strength of the double-sided corrugated cardboard sheet | seat 506 will become weak, and a high quality product cannot be manufactured.

  The present invention was devised in view of such a problem, and the double-sided corrugated cardboard sheet is formed so that the step top portions of the core are not crushed and the center step tops are attached in synchronization with each other. An object of the present invention is to provide a double-sided cardboard manufacturing apparatus that can further improve the strength of the sheet.

  For this reason, the double-sided corrugated board manufacturing apparatus according to the first aspect of the present invention joins the first liner, the first core, the intermediate liner, the second core, and the second liner in this order, A double-sided corrugated board manufacturing apparatus for producing a double-sided corrugated board sheet having a five-layer structure, the first and second corrugating rolls meshing with each other and stepping the first core, and meshing with each other. 3rd and 4th corrugated rolls that corrugate the core, and the second corrugated roll and the 3rd corrugated roll rotate in synchronism with the top of the corrugated surface, Sandwiching the intermediate liner between the first core wound around the second corrugated roll and the second core wound around the third corrugated roll; The tops of the first core and the second core are pressed against the intermediate liner and bonded together. It is a symptom.

According to a second aspect of the present invention, there is provided the double-sided corrugated board manufacturing apparatus according to the first aspect, wherein the first, second, third and fourth corrugated rolls are arranged side by side in the vertical direction of the apparatus. It is characterized by being.
The double-sided corrugated board manufacturing apparatus of the present invention according to claim 3 is the apparatus according to claim 1 or 2, wherein the sheet formed of the first core, the second core, and the intermediate liner is used. A first guide roll that presses and bonds the first liner to the surface of the first core, and a second guide that presses and bonds the second liner to the surface of the second core It is characterized by having a roll.

  The double-sided corrugated board manufacturing apparatus of the present invention according to claim 4 has a five-layer structure in which the first liner, the first core, the intermediate liner, the second core, and the second liner are joined in this order. A double-sided corrugated board manufacturing apparatus for producing a double-sided corrugated board sheet having the first and second corrugated rolls that mesh with each other and repeat the first core, and the second core that meshes with each other The first and second liner rolls, and the first liner pressed against and bonded to the first core that is wound around the surface of the first corrugated roll. A first pressure device, and a second pressure device that presses and bonds the second liner to the second core in a state of being wound around the surface of the third corrugated roll. The first core to which the first liner is bonded and the second core to which the second liner is bonded; First and second guide rolls that synchronize the step tops and sandwich the intermediate liner therebetween to press and bond the step tops of the first and second cores to the intermediate liner. It is characterized by having.

  According to a fifth aspect of the present invention, there is provided the double-sided corrugated board manufacturing apparatus according to the fourth aspect of the present invention, wherein the first pressurizing device is arranged to face the first corrugated roll. A counter roll and an endless belt wound around the first pair of counter rolls and in contact with the surface of the first corrugated roll are configured, and the second pressurizing device includes A second pair of opposed rolls disposed opposite to the third corrugated roll, and an endless shape wound around the second pair of opposed rolls and contacting the surface of the third corrugated roll It is characterized by having a belt.

According to a sixth aspect of the present invention, there is provided the double-sided corrugated board manufacturing apparatus according to the fifth aspect, wherein the rotational speed of one of the first pair of opposed rolls and the second pair of opposed rolls are selected. An adjustment device for adjusting one of the rotational speeds is provided.
The double-sided corrugated board manufacturing apparatus according to claim 7, wherein the first pressurizing device is arranged to face the first corrugated roll and is in contact with the first corrugated roll. The second pressurizing device is configured to have a second pressurizing roll that is disposed to face the third corrugated roll and is in contact with the third corrugated roll. It is characterized by being.

The multi-sided corrugated board manufacturing apparatus of the present invention according to claim 8 is the apparatus according to any one of claims 1 to 7, wherein the apparatus is heated with a first pressurizing unit that pressurizes one surface of the double-sided corrugated cardboard sheet. And a first heating means, and a second pressurizing means for pressurizing the other surface of the double-sided corrugated cardboard sheet and a second heating means for heating.
A multi-sided corrugated board manufacturing apparatus according to a ninth aspect of the present invention is the apparatus according to any one of claims 1 to 7, wherein a plurality of pressurizing means that pressurize one side of the double-sided corrugated cardboard sheet, And a plurality of heating means for heating the other surface of the double-sided cardboard sheet.

  According to the double-sided corrugated board manufacturing apparatus of the present invention, the step tops of the first core and the second core are not crushed during traveling, and the first core core top and the second core It becomes possible to manufacture a double-sided cardboard sheet that is synchronized with the step top of the core, and the strength of the double-sided cardboard sheet can be improved. Further, the apparatus configuration is simple, and the apparatus can be made compact.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) 1st Embodiment FIG.1 and FIG.2 is a figure for demonstrating the double-sided cardboard manufacturing apparatus as 1st Embodiment of this invention, Comprising: FIG. 1 is the side view, FIG. 2 is the apparatus. It is a side view of the double-sided corrugated board sheet manufactured by this.

  As shown in FIG. 2, the double-sided cardboard apparatus according to the present embodiment includes a back liner (first liner) 1, a corrugated (stepped) core (first core) 2, A double-sided corrugated cardboard sheet having a five-layer structure of an intermediate liner 3, a stepped middle core (second core) 4, and a front liner (second liner) 5 is manufactured. Specifically, first, the core 2 that is stepped on one surface of the intermediate liner 3 is bonded together, and the core 4 that is stepped on the other surface of the intermediate liner 3 is bonded. The liner 1 is affixed and the front liner 5 is affixed to the core 4 to produce a double-sided cardboard sheet 8.

  For this reason, as shown in FIG. 1, the present double-sided corrugated board manufacturing apparatus includes a stepping device (first stepping device) 10 for stepping the core 2 and a core 2 that is stepped by the stepping device 10. A gluing device (first gluing device) 13 for attaching glue to a step top (or simply called a top) on one surface side, a step feeding device (second feeding device) 30 for stepping the core 4, Gluing device (second gluing device) 33 for adhering glue to the step top portion of one surface side of the core 4 fed by the step feeding device 30 and the core 2 glued by the gluing device 13 are connected to the intermediate liner 3. At the same time, the core 4 glued by the gluing device 33 is pasted on the other surface of the intermediate liner 3 and the core core pasted on the intermediate liner 3 by the core pasting device 50. 2 Gluing to the top of the other side A gluing device (third gluing device) 17; a gluing device (fourth gluing device) 37 for gluing to the step on the other surface side of the middle core 4 bonded to the intermediate liner 3 by the middle core gluing device 50; The back liner 1 is bonded to the step top on the other surface side of the core 2, and the double facer 45 is mainly configured to bond the front liner 5 to the step top on the other surface side of the core 4.

The corrugating apparatus 10 includes a pair of upper rolls (first corrugated rolls) 11 and lower rolls (second corrugated rolls) 12 that are disposed so as to face each other vertically. Further, the upper roll 11 and the lower roll 12 are rotated in opposite directions directly or indirectly by a driving device (not shown). Here, the upper roll 11 rotates in the direction of arrow A _{1 in} FIG. 1, and the lower roll 12 rotates in the direction of arrow A _{2 in} FIG.

  The surfaces of the upper roll 11 and the lower roll 12 of the feeding device 10 are each formed in a corrugated shape in the circumferential direction (that is, a step and a valley are formed although not shown), and the upper roll 11 and the lower roll 12 are formed. In the nip portion where the upper rolls 11 come into contact with each other, the step mountain of the upper roll 11 and the step valley of the lower roll 12 mesh with each other, and the step valley of the upper roll 11 and the step mountain of the lower roll 12 mesh with each other. Then, the core 2 enters the nip portion between the upper roll 11 and the lower roll 12 substantially horizontally (inserted) and is stepped into a corrugated shape, and is then wound around the surface of the lower roll 12 by a half turn. It is sent to the core pasting device 50.

Further, steam is sealed inside the upper roll 11 and the lower roll 12, whereby the surfaces of the upper roll 11 and the lower roll 12 are heated. By heating the core 2 in this way, the core 2 and the intermediate liner 3 can be bonded more reliably.
The gluing device 13 is provided in the vicinity of the area where the core 2 of the lower roll 12 is wound. Specifically, the gluing device 13 includes a glue reservoir 14 for storing glue, and a step top portion of the core 2 in which the glue in the glue reservoir 14 is wound around the lower roll 12 (a step on one surface side of the core 2). The gluing roll 15 is attached to the top of the gluing roll 15, and the scraping roll 16 is provided with a scraper 16a protruding from the gluing roll 15 as needed.

On the other hand, the sheet feeding device 30 is provided below the sheet feeding device 10, and a pair of upper rolls (third rolls) 31 and lower rolls (fourth rolls) arranged to face each other vertically. ) 32. That is, four rolls of the upper roll 11 and the lower roll 12 of the feeding device 10 and the upper roll 31 and the lower roll 32 of the feeding device 30 are arranged side by side in the vertical direction of the device. Further, the upper roll 31 and the lower roll 32 are rotated in opposite directions directly or indirectly by a driving device (not shown). Here, the upper roll 31 rotates in the direction of arrow A _{3 in} FIG. 1, and the lower roll 32 rotates in the direction of arrow A _{4 in} FIG. In addition, the rotation direction of the lower roll 12 of the feeding device 10 and the upper roll 31 of the feeding device 30 is also opposite.

  The surfaces of the upper roll 31 and the lower roll 32 of the feeding device 30 are each formed in a waveform in the circumferential direction (that is, although not shown, stepped mountains and valleys are formed), and the upper roll 31 and the lower roll 32 are formed. At the nip where the upper roll 31 and the lower roll 32 are in contact with each other, the upper mountain 31 and the lower roller 32 are engaged with each other, and the upper roller 31 and the lower roller 32 are engaged with each other. Then, the core 4 enters the nip portion between the upper roll 31 and the lower roll 32 substantially horizontally (inserted) and is stepped into a waveform, and then is wound around the surface of the upper roll 31 by a half turn. It is sent to the core pasting device 50.

Further, steam is sealed inside the upper roll 31 and the lower roll 32, whereby the surfaces of the upper roll 31 and the lower roll 32 are heated. By heating the core 4 in this manner, the core 4 and the intermediate liner 3 can be bonded more reliably.
The gluing device 33 is provided in the vicinity of the region where the core 4 of the upper roll 31 is wound. Specifically, the gluing device 33 includes a glue reservoir 34 for storing glue, and a step top portion of the core 4 in which the glue in the glue reservoir 34 is wound around the upper roll 31 (a step on one surface side of the core 4). And a scraping roll 36 provided with a scraper 36a protruding so as to scrape off the glue attached to the surface of the pasting roll 35 as required.

The core sticking device 50 is composed of the lower roll 12 of the above-described setting device 10 and the upper roll 31 of the setting device 30. That is, the lower roll 12 of the feeding device 10 and the upper roll 31 of the feeding device 30 are also used as components of the core sticking device 50. The lower roll 12 and the upper roll 31 are arranged to face each other, but are not meshed with each other and rotated. That is, here, the top of the surface of the lower roll 12 and the top of the upper roll 31 are rotated so as to be in contact with each other. When the intermediate liner 3 enters the contact portion between the lower roll 12 and the upper roll 31 substantially horizontally as indicated by an arrow B ₁ in FIG. 1, the core 2 is bonded to the upper surface (one surface) of the intermediate liner 3. At the same time, the core 4 is bonded to the lower surface (other surface) of the intermediate liner 3. As a result, the step top of the core 2 and the step top of the core 4 are reliably synchronized (synchronized) and bonded to the intermediate liner 3 without shifting. The corrugated cardboard sheet (intermediate product) comprising the core 2, the intermediate liner 3, and the core 4 that have passed through the contact portions of the lower roll 12 and the upper roll 31 is conveyed to the subsequent process substantially horizontally.

  The gluing device 17 is provided on the downstream side in the sheet conveyance direction from the contact portion of the lower roll 12 and the upper roll 31 and above the sheet conveyance path. Specifically, the gluing device 17 includes a gluing reservoir 18 that stores gluing, and a gluing roll 19 that adheres the glue of the gluing reservoir 18 to the step top portion of the core 2 (the step top portion on the other surface side of the core 2). And a scraping roll 20 provided with a scraper 20a protruding to scrape off the glue adhering to the surface of the gluing roll 19 as needed. Thereby, glue is attached to the step top of the core 2.

  The gluing device 37 is provided downstream of the contact portions of the lower roll 12 and the upper roll 31 in the sheet conveyance direction and below the sheet conveyance path. Specifically, the gluing device 37 includes a gluing reservoir 38 that stores the gluing, and a gluing roll 39 that adheres the glue of the gluing reservoir 38 to the step top of the core 4 (the step top on the other surface side of the core 4). And a scraping roll 40 provided with a scraper 40a that scrapes off the glue adhering to the surface of the gluing roll 39 as necessary. Thereby, glue is attached to the step top of the core 4.

  The double facer 45 is provided on the downstream side of the gluing device 17 and the gluing device 37 in the sheet conveying direction. Specifically, the double facer 45 is a pressure device (first pressurizing device) disposed above the sheet conveying path via the belt 22. Pressure means) 23 and a pressure device (second pressure means) 24, and a heating plate (first heating means) 43 and a heating plate (second pressure) arranged via a belt 42 below the sheet conveying path. Heating means) 44 is mainly provided. Here, the pressure devices 23 and 24 are arranged above the sheet conveyance path and the heating plates 43 and 44 are arranged below the sheet conveyance path. However, the pressure devices ( A first pressurizing unit) and a heating plate (first heating unit) are arranged one by one, and a pressurizing device (second pressurizing unit) and a heating plate (second heating) are also provided below the sheet conveyance path. (Means) may be arranged one by one. In this case, for example, a pressure device is disposed on the upstream side in the sheet conveying direction, and a heating plate is disposed on the downstream side.

  Further, the belt 22 is formed in an endless shape, wound around a guide roll 21 provided on the upstream side in the sheet conveying direction from the pressurizing device 23, and the belt 42 is also endless in the same manner as the belt 22. And is wound around a guide roll 41 provided upstream of the heating plate 43 in the sheet conveying direction. The guide roll 21 is disposed at a position close to the center core 2, and the guide roll 41 is disposed at a position close to the center core 4.

  As a result, the back liner 1 is fed from substantially vertically above the sheet conveying path and is bonded to the step top of the core 2 by the guide roll 21 and the belt 22, and the front liner 5 is substantially vertically below the sheet conveying path. It is fed and bonded to the step top of the core 4 by the guide roll 41 and the belt 42. And after pressurizing with the pressurization apparatuses 23 and 24, the double-sided corrugated-cardboard sheet 8 is manufactured by heating with the heating plates 43 and 44. FIG.

Since the double-sided corrugated board manufacturing apparatus according to the first embodiment of the present invention is configured as described above, the center core is formed by the contact portions of the lower roll 12 of the setting apparatus 10 and the upper roll 31 of the setting apparatus 30. 2 step tops and the step tops of the core 4 can be reliably synchronized. In addition, since the core 2 and the core 4 are wound around a roll having a corrugated surface (the roll having the same surface shape as the upper roll and the lower roll) as in the prior art, the structure is not transported. The step tops of the core 2 and the core 4 are not crushed during normal running. Thereby, it becomes possible to manufacture the double-sided corrugated cardboard sheet 8 in which the step top of the core 2 and the step top of the core 4 are synchronized, and the strength of the double-sided cardboard sheet 8 can be further improved.
Further, the apparatus configuration is simple, and the apparatus can be made compact.

(B) 2nd Embodiment FIG. 3: is a side view which shows typically the double-sided corrugated board manufacturing apparatus as 2nd Embodiment of this invention. Note that FIG. 2 referred to in the first embodiment will be used as appropriate.
As shown in FIG. 2, the double-sided corrugated cardboard device according to this embodiment includes a back liner (first liner) 1 and a corrugated core that is formed into a corrugated shape (stepped) as in the first embodiment. To produce a double-sided corrugated cardboard sheet having a five-layer structure of a first core 2, an intermediate liner 3, a stepped core (second core) 4, and a front liner (second liner) 5. It has become. However, in the present double-sided corrugated board manufacturing apparatus, first, the core 2 rolled up to the back liner 1 is bonded to form a single-sided cardboard sheet, and the core 4 rolled up to the front liner 5 is bonded together. A single-sided corrugated cardboard sheet is formed, and then the two-sided corrugated cardboard sheet cores 2 and 4 are bonded together via an intermediate liner 3 to produce a double-sided cardboard sheet 8.

  For this reason, as shown in FIG. 3, the double-sided corrugated board manufacturing apparatus includes a stepping device (first stepping device) 110 for stepping the core 2, and a core 2 stepped by the stepping device 110. A single-sided corrugated board by pasting a back liner 1 on a gluing device (first gluing device) 113 for attaching glue to a step top (or simply called a top) on one side of the sheet and a core 2 glued by the gluing device 113 A pressurizing device (first pressurizing device) 160 for forming a sheet (first single-sided corrugated cardboard sheet) 6, a stepping device (second stepping device) 130 for stepping the core 4, and a stepping device Gluing device (second gluing device) 133 for adhering glue to the top of the one side of the core 4 stepped by 130 and the front liner 5 are bonded to the core 4 glued by the gluing device 133 Single-sided cardboard sheet (first single-sided cardboard A pressure device (first pressure device) 170 for forming the sheet sheet 7, a gluing device (third gluing device) 117 for gluing to the top of the other side of the core 2 of the single-sided cardboard sheet 6, A gluing device (fourth gluing device) 137 for gluing to the top of the other side of the core 4 of the single-sided cardboard sheet 7; a step of the core 2 of the single-sided cardboard sheet 6; And a double facer 145 that is bonded together via the intermediate liner 3 in synchronism with the step top.

The corrugating apparatus 110 includes a pair of upper rolls (first corrugated rolls) 111 and lower rolls (second corrugated rolls) 112 that are arranged to face each other vertically. Further, the upper roll 111 and the lower roll 112 are rotated in opposite directions directly or indirectly by a driving device (not shown). Here, the upper roll 111 is rotated in the arrow A ₁ direction in FIG. 3, and, the lower roll 112 is designed to rotate the arrow in FIG A ₂ direction.

  The surfaces of the upper roll 111 and the lower roll 112 of the gantry 110 are each formed in a corrugated shape in the circumferential direction (that is, a step and a valley are formed although not shown), and the upper roll 111 and the lower roll 112 are formed. In the nip where the upper roll 111 and the lower roll 112 come into contact with each other, the upper roll 111 and the lower roll 112 are engaged with each other, and the upper roll 111 and the lower roll 112 are engaged with each other. Then, the core 2 is conveyed below the lower roll 112 and wound around the lower roll 112 by a half turn, and then enters (inserted) into the nip portion between the upper roll 111 and the lower roll 112 to have a waveform. Then, the sheet is wound around the surface of the upper roll 111 and sent to the nip portion with the pressure device 160.

Further, steam is sealed inside the upper roll 111 and the lower roll 112, and the surfaces of the upper roll 111 and the lower roll 112 are thereby heated. By heating the core 2 in this way, the core 2 and the back liner 1 can be bonded more reliably.
The gluing device 113 is provided in the vicinity of the area where the core 2 of the upper roll 111 is wound. Specifically, the gluing device 113 includes a glue reservoir 114 for storing glue, and a step top portion of the core 2 in which the glue in the glue reservoir 114 is wound around the upper roll 112 (a step on one surface side of the core 2). A gluing roll 115 attached to the top) and a scraping roll 116 provided with a scraper 116a that scrapes off the gluing adhering to the surface of the gluing roll 115 as necessary.

The pressure device 160 includes a belt roll 161 and a stretch roll 162 (first pair of opposed rolls) provided to face the upper roll 111, and an endless shape wound around the two opposed rolls 161 and 162. The belt 163 is configured. Both the belt roll 161 and the stretch roll 162 rotate in the direction opposite to the upper roll 111 (directions C ₁ and C ₂ shown in FIG. 3). Moreover, the belt 163 rotates with the belt roll 161 and stretching roll 162 to 3 in the arrow D ₁ direction, is adapted to be pressed in a predetermined region in the circumferential direction of the upper roll 111 (winding wound). As a result, the back liner 1 enters the nip portion between the upper roll 111 and the pressure device 160 from the belt roll 161 side, and is bonded to the core 2 in the above-mentioned predetermined region, and from the core 2 and the back liner 1. The single-sided corrugated cardboard sheet 6 is formed, and the single-sided corrugated cardboard sheet 6 exits from the stretch roll 162 side and is conveyed upward of the apparatus.

On the other hand, the setting device 130 is provided to face the setting device 110 at a predetermined interval, and a pair of upper rolls (third step rolls) 131 and lower rolls arranged to be opposed to each other vertically. A (fourth stage roll) 132 is provided. That is, here, the upper roll 111 and the lower roll 112 of the rolling device 110 and the upper roll 131 and the lower roll 132 of the rolling device 130 are arranged to face each other with a predetermined interval in the left-right direction in FIG. Yes. Further, the upper roll 131 and the lower roll 132 are rotated in opposite directions directly or indirectly by a driving device (not shown). Here, the upper roller 131 is rotated in the arrow A ₃ direction in FIG. 3, and, the lower roll 132 is designed to rotate the arrow in FIG A ₄ direction.

  The surfaces of the upper roll 131 and the lower roll 132 of the corrugating apparatus 130 are each formed in a corrugated shape in the circumferential direction (that is, although not shown, stepped mountains and valleys are formed), the upper roll 131 and the lower roll 132 are formed. In the nip portion where the upper roll 131 and the lower roll 132 are in contact with each other, the upper roll 131 and the lower roll 132 are engaged with each other, and the upper roll 131 and the lower roll 132 are engaged with each other. Then, the core 4 is conveyed below the lower roll 132 and wound around the lower roll 132 by a half turn, and then enters (inserts) into the nip portion between the upper roll 131 and the lower roll 132 so as to have a waveform. Then, the sheet is wound around the surface of the upper roll 131 and sent to the nip portion with the pressure device 170.

Further, steam is sealed inside the upper roll 131 and the lower roll 132, and the surfaces of the upper roll 131 and the lower roll 132 are thereby heated. By heating the core 4 in this way, the core 4 and the front liner 5 can be bonded more reliably.
The gluing device 133 is provided in the vicinity of the area around which the core 4 of the upper roll 131 is wound. Specifically, the gluing device 133 includes a glue reservoir 134 for storing glue, and a step top portion of the core 4 in which the glue in the glue reservoir 134 is wound around the upper roll 131 (a step on one surface side of the core 4). And a scraping roll 136 having a scraper 136a protruding so as to scrape off the glue attached to the surface of the pasting roll 135 as necessary.

The pressure device 170 includes a belt roll 171 and a stretch roll 172 (second pair of opposed rolls) provided to face the upper roll 131, and an endless shape wound around these two opposed rolls 171 and 172. The belt 173 is configured. Both the belt roll 171 and the stretch roll 172 rotate in the direction opposite to the upper roll 131 (C ₃ and C ₄ directions shown in FIG. 3). Moreover, the belt 173 rotates with the belt roll 171 and stretching roll 172 to 3 in the arrow D ₂ direction, so that is pressed against a predetermined region in the circumferential direction of the upper roll 131 (winding wound). As a result, the front liner 5 enters the nip portion between the upper roll 131 and the pressure device 170 from the belt roll 171 side, and is bonded to the central core 4 in the predetermined area, and from the intermediate core 4 and the front liner 5. The single-sided corrugated cardboard sheet 7 is formed, and the single-sided corrugated cardboard sheet 7 exits from the stretch roll 172 side and is conveyed upward of the apparatus.

The single-sided cardboard sheet 6 and the single-sided cardboard sheet 7 formed as described above are located above the space between the unit composed of the corrugating device 110 and the pressurizing device 160 and the unit composed of the corrugating device 130 and the pressurizing device 170. In the middle of the vehicle, it is glued by a gluing device 117 and a gluing device 137.
The gluing device 117 is provided downstream of the nip portion between the upper roll 111 and the pressure device 160 in the sheet feeding device 110 in the sheet conveying direction. Specifically, the gluing device 117 includes a gluing reservoir 118 that stores gluing, and a gluing roll 119 that adheres the glue of the gluing reservoir 118 to the step top portion of the core 2 (the step top portion on the other surface side of the core 2). And a scraping roll 120 provided with a scraper 120a protruding to scrape off the glue adhering to the surface of the gluing roll 119 as necessary. Thereby, glue is attached to the step top of the core 2 of the single-sided cardboard sheet 6.

  The gluing device 137 is provided on the downstream side in the sheet conveying direction from the nip portion between the upper roll 131 and the pressure device 170 of the feeding device 130. Specifically, the gluing device 137 includes a gluing reservoir 138 that stores gluing, and a gluing roll 139 that adheres the glue of the gluing reservoir 138 to the step top portion of the middle core 4 (step top portion on the other surface side of the middle core 4). And a scraping roll 140 provided with a scraper 140a that scrapes off the glue attached to the surface of the gluing roll 139 as necessary. Thereby, glue is attached to the step top of the core 4 of the single-sided cardboard sheet 7.

The double facer 145 is provided downstream of the gluing device 117 and the gluing device 137 in the sheet conveying direction (upward of the device), and specifically, disposed on the left side of the sheet conveying path in FIG. The apparatus mainly includes pressurization devices 123 and 124 and heating plates 143 and 144 disposed below the sheet conveyance path via a belt 142.
Further, the belt 122 is formed in an endless shape, and is wound around a guide roll 121 provided on the upstream side of the sheet conveyance direction (downward of the apparatus) with respect to the pressurizing apparatus 123, and the belt 142 is also connected to the belt 122. Similarly, it is formed in an endless shape, and is wound around a guide roll 141 provided on the upstream side in the sheet conveyance direction (below the apparatus) with respect to the heating plate 143.

As a result, as shown by the arrow F ₁ in FIG. 3, the intermediate liner 3 has a space between the unit made up of the stepping device 110 and the pressurizing device 160 and the unit made up of the stepping device 130 and the pressurizing device 170. It is conveyed from the lower side to the upper side, enters between the guide roll 121 and the guide roll 141, the top portion of the core 2 of the single-sided cardboard sheet 6 is attached to one side, and the single-sided cardboard sheet 7 is attached to the other side. The step top of the core 4 is pasted. And after pressurizing with the pressurization apparatus 123,124, the double-sided corrugated-cardboard sheet 8 is manufactured by heating with the heating plates 143,144.

  Further, the present double-sided corrugated board manufacturing apparatus is provided with an adjusting device 180 that adjusts the rotational speeds of the belt roll 161 and the belt roll 171. By adjusting the speeds of the single-sided cardboard sheet 6 and the single-sided cardboard sheet 7, the step of the core 2 of the single-sided cardboard sheet 6 and the step of the center 4 of the single-sided cardboard sheet 7 are synchronized. 3 can be pasted together. Although the rotational speeds of both the belt roll 161 and the belt roll 171 are adjusted here, only one rotational speed may be adjusted. Further, instead of the belt roll 161 and the belt roll 171, the rotational speed of one or both of the upper roll 111 and the upper roll 131 may be adjusted. Alternatively, although not illustrated, for example, by adjusting the tension applied to the back liner 1 and the front liner 5 in advance in a paper splicing device, the top of the core 2 of the single-sided cardboard sheet 6 and the core 4 of the single-sided cardboard sheet 7 are adjusted. You may make it synchronize with a step top part.

  Since the double-sided corrugated board manufacturing apparatus according to the second embodiment of the present invention is configured as described above, the step top of the core 2 and the step top of the center core 4 can be synchronized, as in the prior art. Since the core 2 and the core 4 are wound around a roll whose surface is formed into a corrugated surface (a roll having the same surface shape as the upper roll and the lower roll), it is not configured to be transported normally. The step tops of the core 2 and the core 4 are not crushed. Thereby, it becomes possible to manufacture the double-sided corrugated cardboard sheet 8 in which the step top of the core 2 and the step top of the core 4 are synchronized, and the strength of the double-sided cardboard sheet 8 can be further improved.

Further, since the belt 163 is wound around a predetermined region of the upper roll 111 of the feeding device 110 and the back liner 1 is pressed against the core 2, pressure can be applied on the surface. Similarly, since the belt 173 is wound around a predetermined region of the upper roll 131 of the feeding device 130 and the front liner 5 is pressed against the core 4, pressure can be applied on the surface. Thereby, the apparatus vibration can be reduced as compared with the case where the line pressure is applied and pressed, and a high-quality product can be manufactured by reducing the press marks.
Furthermore, the apparatus configuration is simple and the apparatus can be made compact.

(C) Third Embodiment FIG. 4 is a side view schematically showing a double-sided cardboard manufacturing apparatus as a third embodiment of the present invention. In FIG. 4, the same parts as those in the double-sided corrugated board manufacturing apparatus of the second embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted because it is the same as that of the second embodiment.

As shown in FIG. 4, the double-sided corrugated board manufacturing apparatus according to the present embodiment is different from the second embodiment described above in the configuration of the pressurizer 160 and the pressurizer 170. In other words, in the present embodiment, the pressure device 160 is disposed so as to face the upper roll 111 of the corrugating apparatus 110 and is capable of rotating in contact with the upper roll 111 (first pressure roll). The pressurizing device 170 includes a pressurizing roll (a second pressurizing roll) that is disposed to oppose the upper roll 131 of the corrugating apparatus 130 and can rotate in contact with the upper roll 131. (Pressure roll) 170a. Furthermore, pressure roll 160a is rotated in the opposite direction to the upper roll 111 (E ₁ direction shown in FIG. 4), rotate in opposite directions (E ₂ direction shown in FIG. 4) is the pressure roll 170a and the upper roll 131 It is supposed to be.

  In this case, the adjusting device 180 adjusts the rotational speeds of the pressure roll 160a and the pressure roll 170a, thereby adjusting the speeds of the single-sided cardboard sheet 6 and the single-sided cardboard sheet 7. The step top of the core 2 of the single-sided cardboard sheet 6 and the step top of the core 4 of the single-sided cardboard sheet 7 can be synchronized and bonded to the intermediate liner 3. Here, the rotational speeds of both the pressure roll 160a and the pressure roll 170a are adjusted, but only one rotational speed may be adjusted. Further, instead of the pressure roll 160a and the pressure roll 170a, the rotational speed of one or both of the upper roll 111 and the upper roll 131 may be adjusted. Alternatively, although not illustrated, for example, by adjusting the tension applied to the back liner 1 and the front liner 5 in advance in a paper splicing device, the top of the core 2 of the single-sided cardboard sheet 6 and the core 4 of the single-sided cardboard sheet 7 are adjusted. You may make it synchronize with a step top part.

  Even with such a configuration, the step top of the core 2 and the step top of the core 4 can be synchronized as in the second embodiment described above, and the surface is shaped into a corrugated shape as in the prior art. Since the core 2 or the core 4 is wound around a roll (a roll having the same surface shape as the upper roll or the lower roll) and transported, the core 2 and the core 4 are not normally transported. The step top is not crushed. Thereby, it becomes possible to manufacture the double-sided corrugated cardboard sheet 8 in which the step top of the core 2 and the step top of the core 4 are synchronized, and the strength of the double-sided cardboard sheet 8 can be further improved.

(D) Others Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the configuration of the gluing device of the above-described embodiment is not limited to this.
In the first embodiment, the core 2 may be wound around the upper roll 11 by half a turn and then entered into the nip portion between the upper roll 11 and the lower roll 12. Similarly, after the core 4 is wound around the lower roll 32 by a half turn, it may be caused to enter the nip portion between the upper roll 31 and the lower roll 32.

  Further, in the second and third embodiments, the middle core 2 is directly moved substantially horizontally into the nip portion between the upper roll 111 and the lower roll 112, or the middle core 4 is moved to the nip portion between the upper roll 131 and the lower roll 132. You may make it approach substantially horizontally.

It is a side view which shows typically the double-sided corrugated board manufacturing apparatus as 1st Embodiment of this invention. 1 is a side view schematically showing a double-sided cardboard sheet manufactured by a double-sided cardboard manufacturing apparatus as a first embodiment of the present invention. It is a side view which shows typically the double-sided cardboard manufacturing apparatus as 2nd Embodiment of this invention. It is a side view which shows typically the double-sided cardboard manufacturing apparatus as 3rd Embodiment of this invention. It is a figure for demonstrating the conventional double-sided cardboard manufacturing apparatus, Comprising: It is a side view of a double-sided cardboard sheet.

Explanation of symbols

1 Back liner (first liner)
2 center core (first core)
3 Intermediate liner 4 Center core (second core)
5 Front liner (second liner)
6 single-sided cardboard sheet (first single-sided cardboard sheet)
7 single-sided cardboard sheet (second single-sided cardboard sheet)
8 Double-sided corrugated cardboard sheet 10, 30, 110, 130 Repeater 11, 31, 111, 131 Upper roll 12, 32, 112, 132 Lower roll 13, 17, 33, 37, 113, 117, 133, 137 Gluing device 14, 18, 34, 38, 114, 118, 134, 138 Glue 15, 19, 35, 39, 115, 119, 135, 139 Gluing roll 16, 20, 36, 40, 116, 120, 136, 140 Scraping Take-up roll 21, 41, 121, 141 Guide roll 22, 42, 122, 142 Belt 23, 24, 123, 124 Pressurizing device 43, 44, 143, 144 Heating plate 45, 145 Double facer 50 Core sticking device 160, 170 Pressure device 160a, 170a Pressure roll 161, 171 Belt roll 162,172 Stretch roll 180 Adjustment device

Claims (9)

A double-sided cardboard for producing a double-sided cardboard sheet having a five-layer structure by joining a first liner, a first core, an intermediate liner, a second core, and a second liner in this order. Manufacturing equipment,
First and second corrugating rolls that mesh with each other and roll the first core;
Comprising third and fourth corrugating rolls that mesh with each other and roll the second core;
The second corrugated roll and the third corrugated roll rotate in synchronism with the top of the corrugated surface, and the first core wound and wound around the second corrugated roll; The intermediate liner is sandwiched between the second core and the second core wound around the third corrugated roll, and the top portions of the first core and the second core are A double-sided corrugated board manufacturing apparatus characterized by being configured to be pressed against and bonded to the intermediate liner. 2. The double-sided corrugated board manufacturing apparatus according to claim 1, wherein the first, second, third and fourth corrugated rolls are arranged side by side in the vertical direction of the apparatus. A first guide roll that presses and bonds the first liner to a surface on the first core side of a sheet formed from the first core, the second core, and the intermediate liner; The double-sided corrugated board manufacturing apparatus according to claim 1 or 2, further comprising a second guide roll that presses and bonds the second liner to a surface on the second core side. A double-sided cardboard for producing a double-sided cardboard sheet having a five-layer structure by joining a first liner, a first core, an intermediate liner, a second core, and a second liner in this order. Manufacturing equipment,
First and second corrugating rolls that mesh with each other and roll the first core;
Third and fourth corrugating rolls that mesh with each other and roll the second core;
A first pressure device that presses and bonds the first liner to the first core in a state of being wound around the surface of the first corrugated roll;
A second pressure device that presses and bonds the second liner to the second core in a state of being wound around the surface of the third corrugated roll;
Synchronizing the tops of the first core to which the first liner is bonded and the second core to which the second liner is bonded, and sandwiching the intermediate liner therebetween, An apparatus for producing double-sided corrugated cardboard, comprising: first and second guide rolls that press and bond each of the first core and the top of the second core to the intermediate liner. The first pressurizing device comprises:
A first pair of opposed rolls disposed to face the first corrugated roll;
The endless belt is wound around the first pair of opposed rolls and is in contact with the surface of the first corrugated roll.
The second pressurizing device comprises:
A second pair of opposing rolls disposed opposite the third corrugated roll;
The double-sided corrugated cardboard according to claim 4, further comprising an endless belt wound around the second pair of opposed rolls and contacting the surface of the third corrugated roll. Manufacturing equipment. 6. An adjusting device is provided for adjusting one rotational speed of the first pair of opposed rolls and one rotational speed of the second pair of opposed rolls. The double-sided cardboard manufacturing apparatus described. The first pressure device is configured to include a first pressure roll disposed opposite to the first corrugated roll and in contact with the first corrugated roll,
The second pressurizing device includes a second pressurizing roll that is disposed to face the third corrugated roll and is in contact with the third corrugated roll. Item 5. The double-sided cardboard manufacturing apparatus according to Item 4. A first pressing means for pressing one side of the double-sided cardboard sheet and a first heating means for heating;
The double-sided cardboard sheet according to any one of claims 1 to 7, further comprising a second pressure unit that pressurizes the other surface of the double-sided cardboard sheet and a second heating unit that heats the double-sided cardboard sheet. Double-sided cardboard manufacturing equipment. A plurality of pressing means for pressing one surface of the double-sided cardboard sheet;
The double-sided cardboard manufacturing apparatus according to any one of claims 1 to 7, further comprising a plurality of heating means for heating the other surface of the double-sided cardboard sheet.

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