JP3477331B2 - Laminated sheet material manufacturing system with warpage prevention device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding sheet material manufacturing system provided with a warp generation preventing device for preventing a warp from occurring during manufacturing of a bonding sheet material (for example, double-faced corrugated cardboard sheet), and more particularly, The present invention relates to a laminating sheet material manufacturing system with a warp prevention device, which prevents warpage in the vertical direction.

[0002]

2. Description of the Related Art Conventionally, a bonding sheet material manufacturing apparatus for manufacturing a bonding sheet material by bonding a front sheet member and a back sheet member has been developed.
For example, a plurality of pieces of paper are attached to each other and corrugated paper (that is,
There is a double-sided corrugated board manufacturing apparatus (hereinafter referred to as a corrugated machine) that manufactures double-sided corrugated board, hereinafter referred to as corrugated board or corrugated board sheet.

Explaining this corrugating machine, FIG. 5 is a side view schematically showing a conventional corrugating machine. As shown in FIG. 5, the corrugated machine includes single facers 41 and 42, a double facer 50, a dry end 60 including a slitter scorer, a cutoff stacker, and the like, a stacking unit 70, and the like.

Of these, single facers 41, 42
Is a one-sided corrugated fiberboard sheet in which a core raw paper (hereinafter also referred to as a core) 3 is formed into a wave shape, and the corrugated core raw paper 3 and a back liner base paper (hereinafter also referred to as a back liner) 2 are adhered to each other. 4 is formed. Therefore, the single facers 41, 42 are respectively provided with the core raw paper supply units 41a, 4
The core raw papers 3 and 3 are introduced from 2a, and the back liner raw papers 2 and 2 are introduced from back liner raw paper supply units 41b and 42b, respectively. Further, the core raw papers 3 and 3 are heated by the preheaters 41d and 42d, and the back liner raw papers 2 and 2 are heated by the preheaters 41c and 42c, so that heat for corrugation and solidification of starch paste can be given. There is.

The double facer 50 forms a double-sided corrugated board sheet 5 by bonding a single-sided corrugated board sheet 4 and a front liner base paper (hereinafter also referred to as a front liner) 1 to each other.
Therefore, the single-faced corrugated board sheet 4 formed by the single facers 41 and 42 is heated by the preheater 43, passed through the gluing device 45, and then introduced into the double facer 50. Supply unit 4
Similarly, the front liner base paper 1 supplied from No. 4 is also heated by the preheater 43, passed through the gluing device 45, and then introduced into the double facer 50.

As shown in the schematic side view of FIG. 6, the double facer 50 includes a hot plate group 51 arranged on the lower side and a pressurizing device (air pressurizing device) for applying pressure from the upper side to the hot plate group 51. Or a pressure device such as a weight roll) 52, an upper conveyor 53 and a lower conveyor 54 that convey a double-sided corrugated cardboard sheet 5 formed by adhering the single-sided corrugated cardboard sheet 4 to the front liner base paper 1. .

Then, the single-faced corrugated cardboard sheet 4 introduced into the double facer 50 and the front liner 1 are in a state of being joined to each other via the adhesive attached to the step top portion of the core 3, and slide on the hot plate group 51. When traveling while moving, the heat is received from the hot plate group 51 to raise the temperature, and the single-sided corrugated board sheet 4 and the front liner 1
The glue between and is individualized and adhered.
The double-faced corrugated sheet 5 thus formed by bonding the single-faced corrugated sheet 4 and the front liner 1 to each other is dried by the upper conveyor 53 and the lower conveyor 54.
Transported to 0.

As shown in FIGS. 5 and 7, the dry end 60 is composed of a slitter scorer 61, a cutoff 62, a stacker 63 and the like, and the conveyed double-sided corrugated sheet 5 is slitted and ruled by the slitter scorer 61. After being put in, it is cut into a divided plate-shaped corrugated cardboard sheet 5'at a cutoff 62. Then, as shown in FIGS. 5 and 7, the divided plate-shaped corrugated cardboard sheet 5 ′ is conveyed by the stacker 63 constituted by a plurality of conveyors, stacked on the stacking unit 70, and discharged to the outside of the machine. It has become.

By the way, when the double-faced corrugated board 5 is manufactured in such a conventional corrugating machine, the double-faced corrugated board 5 is warped due to various factors. The "warp" in this case includes twist warp in which the surface is twisted and vertical warp in which the surface is curved. Various techniques have been developed in order to prevent such warpage, and for example, there are techniques disclosed in Japanese Patent Laid-Open Nos. 6-114977 and 6-114978.

Among these, Japanese Patent Laid-Open No. 6-114977 discloses a device for preventing twist warp which is likely to occur at the time of laminating a bonding material, and FIG. 8 schematically shows the warp generation preventing device. It is a side view shown. In this warpage prevention device, a tension control roller 20 is provided immediately before the laminating roller 19 on the back liner raw paper 2 side of the laminating rollers 19, 19 'for laminating the back liner raw paper 2 and the core raw paper 3. At the same time, a friction roller 21 for folding back the backing liner base paper 2 to the tension control roller 20 is provided, and the diagonal tension of the backing liner base paper 2 is uniformly controlled to prevent twist warp. The backing liner base paper and the core base paper are also called webs.

For this reason, the actuators 22 and 2 each having an elastic rod at both ends of the friction roller 21 are provided.
2'is provided, the rods of the actuators 22 and 22 'are expanded and contracted, and the friction roller 21 and the bonding roller 1
9, the relative parallelism with 9 is changed to uniformly control the tension in the diagonal direction of the backing liner base paper 2 to prevent twist warp.

Further, Japanese Patent Laid-Open No. 6-114978 discloses a technique relating to a method for preventing warpage of a bonded product, and FIG. 9 schematically shows an apparatus for carrying out the method for preventing warpage. It is a side view. This warp prevention device is provided with a delivery roller 33 immediately before the bonding roller 32 on the front liner 1 side of the bonding rollers 32, 34 for bonding the single-sided corrugated cardboard sheet 4 and the front liner base paper 1 to each other. By synchronizing the rotation angle of the delivery roller 33 with the rotation angle of 32, the peripheral speed of the delivery roller 33 is controlled to a speed synchronized with the peripheral speed of the bonding roller 32.
The sheet tension generated by the laminating roller 32 is relaxed to prevent vertical warpage of the laminated cardboard product. The single-sided corrugated board sheet 4 and the front liner base paper 1 are also referred to as a web.

Therefore, a pulse generator 35 is attached to the bonding roller 32 so that the rotation angle of the bonding roller 32 can be detected. The bonding roller 32 detected by the pulse generator 35 is detected. The rotation angle of the feed roller 33 synchronized with the rotation angle is calculated by the controller 36. Then, the servo motor 37 attached to the delivery roller 33 is driven based on a signal from the controller 36 so that the peripheral speed of the delivery roller 33 is controlled to a speed synchronized with the peripheral speed of the bonding roller 32. There is.

[0014]

However, the warp generation preventing device disclosed in the above-mentioned Japanese Patent Laid-Open No. 6-114977 only adjusts the tension of the backing liner base paper 2 before bonding, and therefore twist warp. Even if it is possible to prevent the above, no consideration has been given to the occurrence of vertical warpage that occurs when a double-sided corrugated board sheet is finally formed, and it is not possible to completely prevent the occurrence of vertical warpage. Can not.

The warp prevention device disclosed in Japanese Patent Laid-Open No. 6-114978 mentioned above simply controls the peripheral speed of the feed roller 13 to a speed synchronized with the peripheral speed of the bonding roller 12 before bonding. Although the tension of the front liner base paper 1 of 1 is adjusted to prevent the occurrence of vertical warp, no consideration is given to the difference in tension between the single-sided corrugated fiberboard sheet 4 and the front liner base paper 1, and finally It is not possible to completely prevent the occurrence of vertical warpage that occurs when a double-faced corrugated sheet is formed.

Therefore, the double-faced corrugated sheet 5 formed by bonding the front liner 1 and the single-faced corrugated sheet 4 together.
Is cut at a cutoff 62 provided in the dry end 60 to form a split plate-shaped double-faced corrugated sheet 5 ', as shown in FIGS.
Warp or warp occurs along the direction).

Considering the cause of the warp in the vertical direction that occurs when such a double-faced corrugated board sheet is formed, the following can be considered. First, the first
In the corrugating machine, the pre-heaters 41d, 42d, 41c, 42c for heating the backing liner base paper 2, the core base paper 3, and the single-sided corrugated board sheet 4 in order to express the adhesive force by individualizing starch paste as an adhesive. , 43 are arranged at various places, and a hot plate group 51 for adhering the single-sided corrugated board sheet 4 and the front liner 1 is arranged. The front-liner base paper 1 and the single-sided corrugated board 4 are heated. For,
In the front liner 1 and the single-sided corrugated board sheet 4, an elongation difference due to a water content difference occurs in the running direction (MD direction) and the direction perpendicular thereto (CD direction).

When the front liner base paper 1 and the single-sided corrugated board sheet 4 which have a difference in elongation due to the difference in water content are bonded to each other, internal stress is generated in the formed double-faced corrugated board sheet, and this stress causes vertical warpage. It is thought to occur. Secondly, since the front liner 1 and the single-faced corrugated sheet 4 differ in the speed in the conveying process until they are bonded in the double facer 50, the wrapping angle around the preheater, etc., the front liner 1 and the single-faced corrugated sheet 4 are stuck together. The tension immediately before the adjustment will be different. This tension difference cannot be adjusted by the technique described in the above publication. Therefore, this tension difference causes a difference in extension in the traveling direction (MD direction).

When the front liner base paper 1 and the single-sided corrugated board sheet 4 which have a difference in elongation due to the difference in tension are bonded to each other, internal stress is generated in the formed double-sided corrugated board sheet, and this stress causes a warp in the vertical direction. It is thought to occur. In order to correct such warp in the vertical direction, it is conceivable to change the transport speed, the wrap angle around the preheater, etc. However, the transport speed and the wrap angle around the preheater may be changed under other operating conditions (for example, manufacturing efficiency). And the degree of heating, etc.), it is not preferable to change it to correct the warp.

Further, when the warp is corrected by changing the conveying speed or the wrap angle around the preheater, the correction amount is determined by the operator based on his experience and intuition.
While it requires skill, it is difficult to correct the warp accurately. The present invention was devised in view of such problems, and reliably prevents occurrence of warp (particularly, warp in the vertical direction) in a bonding sheet material such as a double-faced corrugated cardboard sheet formed by a bonding device. To be able to
An object is to provide a laminating sheet material manufacturing system with a warp prevention device.

[0021]

Therefore, according to the laminating sheet material manufacturing system with a warp prevention device of the present invention as set forth in claim 1, the front sheet member and the back sheet member are run while applying tension in the running direction. In the laminating sheet material manufacturing system including a laminating apparatus that forms a laminating sheet material by laminating while performing the laminating sheet material, and a warp generation preventing device that prevents the laminating sheet material from warping A prevention device is provided on the downstream side of the laminating device, and detects a warp of the laminating sheet material, and based on a detection signal from the warp detecting device, the front sheet member and / or the front sheet member. A tension calculation device for calculating the tension applied to the back sheet member, and the front sheet member and / or the back sheet provided on the upstream side of the laminating device so as to have the tension calculated by the tension calculation device. The tension of the member It is characterized in that it comprises a tension adjusting device for adjusting.

With such a structure, in the laminating sheet material manufacturing system with the warp prevention device, the warp detecting device detects the warp of the laminating sheet member on the downstream side of the laminating device to prevent the warp. The tension of the front sheet member and / or the back sheet member before bonding necessary for the calculation is calculated by the tension calculation device, and immediately before the front sheet member and the back sheet member on the upstream side of the bonding device are bonded, The tension of the member and / or the back sheet member is adjusted by a tension adjusting device. This prevents warpage of the laminated sheet material.

According to a second aspect of the present invention, there is provided a laminating sheet material manufacturing system with a warp prevention device, wherein the laminating apparatus is a front liner as a front sheet member and a back sheet member. And a double facer for forming a double-sided corrugated board sheet as the pasting sheet material from the single-sided corrugated board sheet.

With such a structure, the warp detection device detects the actual warp of the double-faced corrugated sheet on the downstream side of the double facer, and in order to suppress the warp, the single-faced corrugated sheet and /
Alternatively, the tension of the front liner is calculated by a tension calculation device, and immediately before the single-faced cardboard sheet on the upstream side of the double facer and the front liner are bonded together, the single-faced cardboard sheet and / or
Alternatively, adjust the tension of the front liner with a tension adjusting device.

Particularly, when a downward warp is detected by the warp detection device, the tension of the single-faced corrugated board is increased to bond them together, and the side of the single-faced corrugated board is contracted so that the double-faced corrugated board tends to warp upward. Thus, the tension is adjusted by the tension adjusting device to prevent the warp in the vertical direction. On the contrary, when the warp detection device detects an upward warp, the tension of the front liner is increased to bond them, and the front liner side is contracted to adjust the tension so that the double-faced corrugated sheet tends to warp downward. The device adjusts the tension to prevent vertical warpage.

The amount of tension adjustment by the tension adjusting device is
In consideration of the amount of warp detected by the warp detection device and the physical properties of the liner paper, it is preferable to calculate by a tension calculation device so that the double-faced corrugated sheet after cutting becomes flat.
Then, by performing tension feedback control based on the relationship between the tension of the single-sided corrugated board sheet and the front liner before laminating and the warping of the double-faced corrugated sheet in the cut state after laminating, the amount of warpage generated in the traveling direction of the corrugated board sheet is controlled. It is preferable to adjust.

A laminated sheet material manufacturing system with a warp prevention device according to a third aspect of the present invention is the system according to the first or second aspect, in which the tension adjusting device includes the front sheet member and / or the back sheet. It is characterized by being a braking device that adjusts the braking force applied to the traveling of the member.
With such a configuration, the braking force applied to the traveling of the front sheet member and / or the back sheet member by the braking device is adjusted, the tension of the front sheet member and / or the back sheet member is adjusted, and this is generated in the bonding sheet material. Prevent warpage.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a laminating sheet material manufacturing system with a warp prevention device according to one embodiment of the present invention. is there. As shown in the schematic partial side view of FIG. 1, a bonding sheet material manufacturing system with a warp occurrence preventing device according to the present embodiment includes a bonding sheet material manufacturing apparatus 80,
It is composed of a warp occurrence prevention device 90. Of these, the bonding sheet material manufacturing apparatus 80 is a dry end including a single facer (see reference numerals 41 and 42 in FIG. 5), a double facer 50, a slitter scorer, a cutoff stacker, and the like, which are not shown in FIG. 60 and a stacking unit 70. Further, the bonding sheet material manufacturing apparatus 80 of the present embodiment is, for example, for manufacturing a corrugated paper (double-sided corrugated sheet, hereinafter referred to as corrugated board or double-sided corrugated sheet) by bonding a plurality of papers. A corrugated board sheet manufacturing apparatus (hereinafter, referred to as a corrugating machine or a corrugator) 80 will be described.

The single facers 41 and 42 are, as described in the prior art (see FIG. 5), the core raw paper (center core).
3 is formed in a wave shape, and the corrugated core raw paper 3 and the back liner base paper (back liner) 2 are bonded to each other to form a single-sided corrugated cardboard sheet (back sheet member) 4. For this reason, the core raw papers 3 and 3 are introduced into the single facers 41 and 42 from the core raw paper feed units 41a and 42a, respectively, and the back liner raw paper feed units 41b and 42, respectively.
The back liner base papers 2 and 2 are introduced from b. The core raw papers 3 and 3 are preheaters 41d and 42d.
The backing liner base papers 2 and 2 are heated by the preheater 41c,
It is heated at 42c to provide heat for corrugation and starch paste solidification.

A pre-heater 43 for heating the single-sided corrugated board sheet 4 and the front liner base paper (front sheet member) 1 is provided on the downstream side of the single facers 41 and 42, and the single-sided corrugated board sheet 4 and the front liner base paper (front side). Gluing device 45 for gluing each sheet member 1
Is provided. Double facer (laminating device) 50
As shown in the schematic side view of FIG. 1, a hot plate group 51 arranged below the hot plate group 51, a pressurizing device 52 for applying pressure from the upper side toward the hot plate group 51, the single-sided corrugated board sheet 4 and the front liner 1 It is composed of an upper conveyor 53 and a lower conveyor 54 that convey the double-faced corrugated cardboard sheet 5 formed by bonding and.

The hot plate group 51 heats the single-faced corrugated board sheet 4 and the front liner 1 which are conveyed while sliding on the hot plate group 51. The hot plate group 51 is configured by appropriately heating a plurality of plate-shaped members with steam, for example. The pressurizing device 52 is configured to generate a pressing force necessary for bonding, for example, by compressed air supplied to the inside of the air chamber, and via the belt of the upper conveyor 53, the single-faced corrugated sheet 4 and the front liner. 1 and 2 are pressed and pressed against the hot plate group 51.

The pressurizing device 52 is designed to generate a pressing force required to bond the single-faced corrugated cardboard sheet 4 and the front liner 1 to each other and to be appropriately heated. The pressure device 52 may be configured to apply pressure by a weight roll or the like. Upper conveyor 53
Is configured as a belt conveyor, and the single-faced corrugated board sheet 4 and the front liner 1 are sandwiched between the hot-plate group 51 and the hot-plate group 51 arranged below the single-faced cardboard sheet 4 and the front liner 1. It is conveyed while being in sliding contact with 51.

The lower conveyor 54 is provided on the downstream side of the hot plate group 51, and sandwiches the double-faced corrugated cardboard sheet (bonding sheet material) 5 with the upper conveyor 53 and conveys it. A predetermined pressing force is obtained so that the double-faced corrugated board sheet 5 can be attached more reliably. For this reason, the upper conveyor 53 and the lower conveyor 54 are arranged at a predetermined interval.

The dry end 60, as shown in FIG.
A cutoff 62, a stacker 63, and a slitter scorer 61 shown in FIG. 5 are provided. Slitter scorer 6
1 is for slitting the conveyed double-sided corrugated board sheet 5 to perform ruled lines. Further, the cut-off 62 is for cutting the double-faced corrugated board sheet 5 in which the ruled lines are formed into a divided plate-shaped corrugated board sheet 5 '. Further, the stacker 63 is composed of a plurality of conveyors and conveys the divided plate-shaped corrugated cardboard sheet 5 '.

As shown in the schematic side view of FIG. 1, the stacking section 70 is a section for stacking divided plate-shaped corrugated cardboard sheets 5 '. Next, the warp prevention device 90, which is a feature of the system of this embodiment, will be described. As shown in FIG. 1, the warp generation prevention device 90 includes a warp detection device 11 provided on the stacker unit 63 (downstream side of the laminating device) of the corrugated machine 80, and an upstream side single-faced corrugated sheet 4 side of the double facer 50. Brake device (tension adjusting device) 9 provided on the front side, and a brake device (tension adjusting device) provided on the front liner 1 side of the double facer 50.
9 ', a control amount for tension adjustment by the brake devices 9, 9'is calculated based on the signal from the warp detection device 11,
It is composed of a tension calculation device 10 which outputs a control signal to the braking devices 9 and 9 '.

Of these, the warp detection device 11 is provided in the stacker section 63 on the downstream side of the double facer 50, is divided by the cutting process at the cut-off 62, and is stacked in the stacker section 63.
Traveling in the traveling direction (M
By scanning in the D direction), the displacement amount (warpage amount) along the traveling direction of the divided plate-shaped corrugated cardboard 5'is detected. A known non-contact displacement type or the like can be used as the warp detection device 11.

The tension calculation device 10 should be applied to the single-faced corrugated cardboard sheet 4 or the front liner 1 before being bonded by the double facer 50 in the tension adjustment device 10 based on the displacement amount (warpage amount) detected by the warpage detection device 11. It is to calculate the tension. The control amount (tension amount) of the single-faced cardboard sheet 4 or the front liner 1 calculated by the tension calculation device 10 is sent to the brake device 9 on the single-faced cardboard sheet 4 side or the brake device 9'on the front liner 1 side as a signal. It is like this.

The tension calculating device 10 includes a warp detecting means 1
In consideration of the amount of warp detected by 1 and the physical properties of paper, the single-sided corrugated sheet before being bonded by the double facer 50 so that the divided plate-shaped double-sided corrugated sheet 5 ′ after being cut by the cutoff 62 becomes flat. 4 or front liner 1
It is designed to calculate the tension to be applied to. The brake device as the tension adjusting device is provided on the upstream side of the double facer 50, and on the single-sided corrugated cardboard sheet 4 side and the front liner 1 side, respectively.

Brake device 9 on the single-sided corrugated board sheet 4 side
Is a brake roll 6 that conveys the single-faced cardboard sheet 4, a brake roll shaft 7 that is a rotation shaft of the brake roll 6, a brake 8, a brake roll shaft 7 and a brake 8.
It is composed of a belt 12 and the like for connecting to the rotating shaft 8A. When the brake 8 does not operate, the rotating shaft 8A of the brake becomes free, and the brake roll 6 rotates according to the conveying speed of the single-faced corrugated cardboard sheet 4. At this time, both the belt 12 and the rotating shaft 8A of the brake are rotated according to the rotation of the brake roll 6.

On the other hand, when the rotation of the belt 12 is restricted by the brake 8, the rotation shaft 8A of the brake, the belt 12,
The rotation of the brake roll 6 is suppressed through the brake roll shaft 7. As a result, a frictional force is generated between the brake roll 6 and the single-sided corrugated board sheet 4, a resistance force in the traveling direction is applied to the single-sided corrugated board sheet 4, and the single-sided corrugated board sheet 4 moves in the traveling direction. The tension of is adjusted.

The brake device 9'on the front liner 1 side
Similarly to the brake device 9'on the front liner 1, the brake roll 6'conveying the front liner 1, the brake roll shaft 7'which is the rotation shaft of the brake roll 6 ', the brake 8', the brake roll shaft 7 '. ′, A brake 8 ′, and a belt 12 ′ that connects the rotating shaft 8′A of the brake 8 ′.

When the brake 8'does not operate, the rotary shaft 8'A of the brake becomes free, and the brake roll 6'rotates according to the conveying speed of the front liner 1. At this time, both the belt 12 'and the rotating shaft 8'A of the brake are adapted to rotate in accordance with the rotation of the brake roll 6'. On the other hand, when the rotation of the belt 12 'is restricted by the brake 8', the rotation of the brake roll 6'is suppressed through the rotation shaft 8'A of the brake, the belt 12 'and the brake roll shaft 7'. As a result, a frictional force is generated between the brake roll 6 ′ and the front liner 1, a resistance force in the traveling direction is applied to the front liner 1, and the tension of the front liner 1 in the traveling direction is increased. Is adjusted.

As described above, the braking devices 9 and 9'apply a braking force to the surface of the single-faced corrugated sheet 4 or the front liner 1 so as to have a resistance force in the traveling direction, and the single-faced corrugated sheet 4 or the front face. It is designed to increase or decrease the tension of the liner 1. The brake devices 9 and 9'may use powder brakes or the like that change the torque of the brake rolls 6 and 6'to change the tension of the single-faced corrugated cardboard sheet 4 or the front liner 1 that is in contact with the brake roll surface.

In FIG. 1, numeral 13 is a gluing device for gluing the single-sided corrugated cardboard sheet 4 to the step top. Since the warp prevention device of the present embodiment is configured as described above, the control for preventing the warp is performed as follows. Here, FIG. 2 is a flowchart showing control of tension adjustment of the single-sided corrugated board sheet or the front liner.

First, in step S10, the warp detection device 11 detects the actual amount of warp of the divided corrugated cardboard 5 ', and the process proceeds to step S20, in which the warp amount detected by the warp detection device 11 is within an allowable range. Determine if there is. As a result of this determination, when it is determined that the warp amount is within the allowable range, the process returns to step S10, the control is repeated, and when it is determined that the warp amount is not within the allowable range, the process proceeds to step S30 to calculate the tension. The device 10 calculates the tension in consideration of the physical properties of the paper, and the process proceeds to step S40.

In step S40, the tension of the single-faced corrugated cardboard sheet or the front liner is adjusted by the brake devices 9 and 9'as tension adjusting devices according to the tension obtained by the tension calculating device 10. Such steps are repeated at a required cycle. Therefore, for example, when the warp of the divided plate-shaped corrugated cardboard sheet 5'is a warp in the downward direction as shown in FIG. 10 (b), it is pasted with the double facer 50 as shown in FIG. 3 (a). The braking device 9 is controlled so as to increase the tension of the single-sided corrugated board sheets 4 before being combined. The single-sided corrugated board sheet 4 thus increased in tension is bonded to the front liner 1 to form the double-sided corrugated board sheet 5 as shown in FIG. 3B. Then, this double-sided corrugated sheet 5 has a cutoff 6
When it is cut by 2 and made into a divided plate-shaped double-faced corrugated sheet 5 ', as shown in FIG. 3 (c), the single-faced corrugated sheet 4 side contracts and tends to warp upward, thereby eliminating the downward warp. It 3 (a), (b), (c)
The middle and MD directions indicate the traveling direction.

On the contrary, when the warp of the divided plate-shaped corrugated cardboard sheet 5'detected by the warp detection device 11 is an upward warp as shown in FIG.
As shown in (a), the brake device 9'is controlled so as to increase the tension of the front liner 1 before being bonded by the double facer 50. The front liner 1 thus increased in tension is bonded to the single-sided corrugated board sheet 4 to form the double-sided corrugated board sheet 5 as shown in FIG. 4 (b). Then, this double-sided corrugated sheet 5 has a cutoff 6
When it is cut by 2 and made into a split plate-shaped double-faced corrugated sheet 5 ', as shown in FIG. 4 (c), the front liner 1 side contracts and tends to warp downward, thereby eliminating the upward warp. . In addition, in FIGS. 4A, 4B, and 4C, the MD direction indicates the traveling direction.

The laminating sheet material manufacturing system of this embodiment operates with the operation of such a warp prevention device, but the entire system operates as follows. First, single facer 41 , 42 The single-sided corrugated board sheet 4 is formed by
Is heated by the preheater 43, passed through the gluing device 45, and then conveyed to the double facer 50.

The front liner base paper 1 supplied from the front liner base paper supply unit 44 is also heated by the preheater 43, passes through the gluing device 45, and then the double facer 5 is used.
Transported to 0. Then, the single-faced corrugated board sheet 4 and the front liner 1 conveyed to the double facer 50 are sandwiched by the upper conveyor 53 and the lower conveyor 54, and are joined to each other via the glue attached to the top of the step of the center core 3. Therefore, when traveling while sliding on the hot plate group 51, the hot plate group 5
1, the temperature is raised by receiving heat, and the glue between the single-sided corrugated board sheet 4 and the front liner 1 is solidified and bonded.

The double-faced corrugated board sheet (laminating sheet material) 5 formed by adhering the single-sided corrugated board sheet 4 and the front liner 1 in this manner is conveyed to the dry end 60 by the upper conveyor 53 and the lower conveyor 54. . The double-faced corrugated cardboard sheet 5 conveyed to the dry end 60 is slitted by the slitter scorer 61, and further ruled lines are formed. Further, the cut-off 62 cuts the double-faced corrugated cardboard sheet 5 having the ruled lines,
As a result, the double-sided corrugated board sheet 5 is formed into a divided plate-shaped corrugated board sheet 5 '. Then, the divided plate-shaped corrugated cardboard sheet 5'is conveyed by the stacker 63 constituted by a plurality of conveyors, stacked on the stacking unit 70, and discharged outside the machine.

The warp detection device 11 detects the warp amount of the divided plate-shaped corrugated cardboard sheet 5'when the divided plate-shaped corrugated cardboard sheet 5'is thus conveyed by the stacker 63, and the detected warp amount is It is sent to the tension calculation device 10 as a signal. Further, the tension calculation device 10 calculates the tension required to prevent this warp, and the calculated control amount is sent to the brake device 9 or the brake device 9 ', and the brake device 9 or the brake device 9' The tension of the single-sided corrugated board sheet 4 or the front liner 1 is adjusted, so that the double-sided corrugated board sheet 5 formed thereafter is prevented from warping.

The laminated sheet material manufacturing system with the warp prevention device of the present embodiment operates in this manner, and therefore, the double-faced corrugated cardboard sheet 5'cut by the cutoff 62 is moved up and down along the traveling direction (MD direction). It is possible to reliably prevent the warpage that occurs in the direction, and it is possible to manufacture a flat, high-quality double-sided corrugated board sheet.

That is, the warp of the split plate-shaped double-faced corrugated sheet 5'cut by the cutoff 62 provided on the downstream side of the double facer 50 and conveyed by the stacker 63 is detected, and the double facer 50 is provided on the upstream side of the double facer 50. Since the tension of the single-sided corrugated board sheet 4 and the front liner 1 conveyed to the 50 is adjusted so as to eliminate the warp of the divided plate-shaped double-faced corrugated board sheet 5 ′ after the bonding, feedback control is performed. There is an advantage that it is possible to reliably prevent the warp that occurs in the up-down direction along the traveling direction (MD direction) of the double-faced corrugated cardboard sheet 5 ′ that has been cut by. Of course, adjusting the tension in this way also suppresses the occurrence of twist warpage.

Further, since the brake devices 9, 9 ', the tension calculation device 10, and the warp detection device 11 are provided so that the tension can be automatically adjusted by the feedback control, the operator can adjust the warp correction amount. There is an advantage that it is not necessary to make adjustments based on experience and intuition, and the warp can be corrected accurately. Further, as the front liner base paper 1 and the single-sided corrugated board 4 travel, a braking force is applied by the brake devices 9 and 9 ', whereby the tensions of the front liner base paper 1 and the single-sided corrugated board 4 are adjusted. There is an advantage that the tension can be easily adjusted with a simple configuration.

In the laminating sheet material manufacturing system with the warp prevention device of the present embodiment, the brake device 9'on the front liner side or the one-sided side according to the warp of the double-faced corrugated cardboard sheet 5'cut by the cutoff 62. Although it has been described that the tension of either one of the corrugated board side braking devices 9 is adjusted, the present invention is not limited to this, and the tensions of both the front liner side braking device 9'and the single-sided corrugated board side braking device 9 are adjusted. It may be adjusted.

For example, when adjusting the tensions of both the front liner side braking device 9'and the single-sided corrugated board side braking device 9, the tension of the front side liner 1 should be decreased and at the same time the tension of the single-sided cardboard sheet 4 should be increased. If they are simultaneously controlled, the tension calculated by the tension calculator 10 can be adjusted without significantly adjusting the tension on one side.

Further, in the laminating sheet material manufacturing system with the warp prevention device of the present embodiment, it has been explained that the brake devices 9 ', 9 are provided on both the front liner side and the single-faced corrugated board side. May be provided in only one of them. Further, the bonding sheet material manufacturing system with the warp occurrence prevention device according to the present embodiment has been described as a corrugating machine for manufacturing a double-faced corrugated board with the warp occurrence preventive device attached. The attached sheet material manufacturing system is not limited to such a corrugating machine, and can be widely applied to a laminated sheet material manufacturing apparatus for manufacturing a laminated sheet material by bonding a front sheet member and a back sheet member. is there.

[0058]

As described in detail above, according to the laminating sheet material manufacturing system with a warp occurrence preventing device of the present invention as set forth in claim 1, the amount of warpage of the laminating sheet material is made downstream of the laminating apparatus. Since it detects and adjusts the tension of the front sheet member and the back sheet member on the upstream side of the laminating apparatus, the warping of the laminating sheet material formed by the laminating apparatus (in particular, the warp in the vertical direction) is detected. There is an advantage that it can be surely prevented.

According to the laminated sheet material manufacturing system with a warp prevention device of the present invention as defined in claim 2, it is possible to reliably prevent the double-faced corrugated sheet from warping (in particular, the warp in the vertical direction). There is an advantage that a high quality double-faced corrugated sheet can be manufactured. According to the bonding sheet material manufacturing system with the warp prevention device of the third aspect of the present invention, there is an advantage that the tension of the front sheet member and / or the back sheet member can be easily adjusted with a simple configuration. is there.

[Brief description of drawings]

FIG. 1 is a partial side view schematically showing a laminating sheet material manufacturing system with a warp prevention device according to an embodiment of the present invention.

FIG. 2 is a flow chart showing tension adjustment control in the laminating sheet material manufacturing system with the warp prevention device according to the embodiment of the present invention.

FIG. 3 is a view for explaining a case where the tension of the single-faced corrugated board sheet before bonding is increased in the bonding sheet material manufacturing system with the warp prevention device according to the embodiment of the present invention. ) Indicates before the laminating, (b) indicates after the laminating and before cutoff, and (c) indicates after the laminating and after cutoff, respectively.

FIG. 4 is a diagram for explaining a case where the tension of the front liner before laminating is increased in the laminating sheet material manufacturing system with the warp prevention device according to the embodiment of the present invention, (a) Shows before the bonding, (b) shows the cut-off after the bonding, and (c) shows the cut-off after the bonding.

FIG. 5 is a side view schematically showing a conventional double-faced corrugated board sheet manufacturing apparatus.

FIG. 6 is a side view schematically showing a double facer of a conventional double-faced corrugated board sheet manufacturing apparatus.

FIG. 7 is a side view schematically showing a stacker and a stacking unit of a conventional double-sided corrugated board sheet manufacturing apparatus.

FIG. 8 is a side view schematically showing a warp prevention device in a conventional double-faced corrugated board sheet manufacturing apparatus.

FIG. 9 is a side view schematically showing a warp occurrence preventing device in a conventional double-faced corrugated board sheet manufacturing apparatus.

FIG. 10 is a diagram for explaining a problem in the conventional double-faced corrugated board sheet manufacturing apparatus, in which (a) shows an upward warp that occurs in the traveling direction (MD direction) of the double-faced corrugated board sheet after division, b) shows the downward warpage, respectively.

[Explanation of symbols]

1 Front liner base paper (front sheet member) 2 Back liner base paper 3 Core paper 4 Single-sided cardboard sheet (back sheet member) 5 Double-sided cardboard sheet (laminating sheet material) 5'divided double-sided corrugated sheet 6,6 'Brake roll 7,7 'Brake roll shaft 8,8 'brake 8A, 8'A Brake rotation axis Brake device (tension adjusting device) 10 Tension calculation device 11 Warp detection device 12 belts 13 Gluing device 19, 19 'Laminating roller 20 Tension control roller 21 Friction roller 22,22 'actuator 32, 34 Laminating roller 33 Sending roller 35 pulse generator 36 controller 37 Servo motor 40 single facers 50 double facer (laminating device) 60 dry end 70 loading section 80 Corrugating machine (laminating sheet material manufacturing equipment) 90 Warp prevention device 41a, 42a Core raw paper supply section 41b, 42b Back liner base paper supply section 41c, 42c, 41d, 42d, 43 preheater 44 Front liner base paper supply department 45 Gluing device 51 Hot plate group 52 Pressurizing device 53 Upper conveyor 54 Lower conveyor 61 Slitter Scorer 62 cut off 63 Stacker

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A 51-135793 (JP, A) JP-A 1-274009 (JP, A) JP-A 6-114978 (JP, A) JP-A 54- 12994 (JP, A) Actual development Sho-56-26236 (JP, U) Actual development 64-32121 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B31F 1/28

Claims (3)

(57) [Claims] 1. A laminating apparatus for laminating a front sheet member and a back sheet member while applying tension in a traveling direction while traveling to form a laminating sheet material, and a warp occurs in the laminating sheet material. In a bonding sheet material manufacturing system including a warp generation preventing device, the warp generation preventing device is provided downstream of the bonding device and detects a warp of the bonding sheet material. A tension calculation device for calculating the tension applied to the front sheet member and / or the back sheet member based on a detection signal from the warp detection device, and the tension calculation device provided on the upstream side of the bonding device. A laminating sheet material with a warp prevention device, comprising: a tension adjusting device for adjusting the tension of the front sheet member and / or the back sheet member so as to obtain the tension calculated by the arithmetic device. Manufacturing system . 2. The laminating apparatus is composed of a double facer for forming a double-faced corrugated sheet as the laminating sheet material from a front liner as the front sheet member and a single-sided corrugated sheet as the back sheet member. The laminating sheet material manufacturing system with a warp prevention device according to claim 1, characterized in that. 3. The tension adjusting device comprises the sheet member and / or
Alternatively, the bonding sheet material manufacturing system with the warp prevention device according to claim 1 or 2, which is a braking device that adjusts a braking force applied to the running of the back sheet member.