JPH09239876A - Apparatus for manufacturing single faced corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibration and noise produced in manufacturing a single faced corrugated fiberboard and press marks produced on the liner side and to laminate a core paper sheet and a liner surely. SOLUTION: On the side opposite to the first stage roll 12 through the second stage roll 14, the first press roll 34 and the second press roll 36 which laminate a core paper sheet 16 and a liner 26 in collaboration with the second stage roll 14 are installed separately in the circumferential direction of the second stage roll 14. The first press roll 34 is rotated at the same peripheral speed as that of the second stage roll 14 by the first motor which rotates the second stage roll 14. The second press roll 36 is rotated at the same peripheral speed as the speed of the liner 26 passing through the area of lamination with the second stage roll 14 by the independent second motor the speed of which can be controlled variably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-sided corrugated board manufacturing apparatus for manufacturing a single-sided corrugated board in which a core paper and a liner are sandwiched by a plurality of press rolls and a second-stage roll to bond them together. .

[0002]

2. Description of the Related Art A single-faced corrugated cardboard manufacturing apparatus (a so-called single facer) is provided with a frame in which a first-stage roll and a second-stage roll, each having a corrugated step formed on a circumferential surface, mesh with each other at the step. The press roll is pressed against the second-stage roll via a core paper which is a raw material paper for single-sided cardboard and a liner. That is, the core paper is supplied between the first-stage roll and the second-stage roll, and a required step portion (flute) is formed when passing through between the both rolls. A starch-based paste is applied to the step top of the obtained waveform by a sizing roll provided in a sizing mechanism. The liner supplied from the opposite side of the core paper via the press roll is pinched between the press roll and the second-stage roll at the top of the core paper, and the core paper and the liner are separated from each other. A single-sided corrugated board is manufactured by laminating.

[0003] The press roll used in the conventional single-sided corrugated cardboard manufacturing apparatus is composed of a large-diameter metal roll body, and the roll is constantly urged toward the second-stage roll and passes between the two rolls. A single-sided corrugated cardboard is manufactured by applying a required nip pressure to a core paper and a liner having a paste applied to the top. In this case, since the step portion consisting of the continuation of the peak and the valley is formed at the required pitch on the outer peripheral surface of the second stage roll, the pressure contact position of both rolls is from the peak to the valley or from the valley. When moving to the mountain, the center of rotation changes slightly. As a result of the rotation of the two rolls, the centers of rotation of the two rolls periodically come close to and separate from each other. As a result, large vibration and high noise are generated during the production of single-faced corrugated cardboard, and this is a factor that greatly impairs the factory environment. . In addition, when the rotation centers of both rolls are periodically approached and separated from each other, the peak of the second-stage roll abuts on the surface of the press roll to periodically apply an impact (a so-called hammer phenomenon). Therefore, on the liner surface of the manufactured single-sided cardboard,
There is a problem that a linear pressing strip (so-called press mark) is formed in the lateral direction at the pitch of the peak of the second roll.

[0004] The above-mentioned various problems are caused by the necessity of setting a large nip pressure because the core paper and the liner need to be pressed and bonded only at one point where the second-stage roll and the press roll face each other. It was caused by that. Therefore, as a means for coping with this, two press rolls which are spaced apart from each other in the circumferential direction of the second-stage roll are arranged in the vicinity of the second-stage roll, and the second-stage roll and each press roll are provided with a center. It has been proposed that the core paper and the liner be sandwiched and stuck together. That is, the first press roll located on the upstream side in the feeding direction of the core paper fed along the outer peripheral surface of the second roll performs initial bonding between the core paper and the liner, and then performs the core paper bonding. The second press roll located on the downstream side in the feeding direction of the sheet makes the complete bonding between the core paper and the liner. According to this configuration, the sum of the nip pressures of the two press rolls may be equal to the nip pressure of the conventional one press roll, so that the nip pressure of each press roll can be set small. As a result, vibration and noise generated due to the nip pressure between the second-stage roll and each press roll can be reduced, and at the same time, it is possible to suppress the formation of a press mark on the single-sided corrugated cardboard.

[0005]

As described above, in the single-faced corrugated board manufacturing apparatus using the two press rolls, in the core paper and the liner which are initially bonded by the first press roll, the glue for bonding the two is gelatin. It is in a semi-solid state and has not completely solidified (by evaporation) of water. Then, by passing the core paper and the liner in this state through the second press roll, the semi-solidified (semi-dry) paste is completely solidified. In this case, in order to prevent loosening or the like from occurring in the initially bonded core paper and liner located between the first press roll and the second press roll, the second press roll is replaced with the first press roll. It was generally performed to rotate at a peripheral speed higher than the peripheral speed. Therefore, at the time when it is necessary for the core paper and the liner to complete the initial adhesion and start solidification with the first press roll, that is, the second press roll.
At the pinching point between the press roll and the second stage roll, the second
The peripheral speed of the press roll becomes faster than the speed of the liner passing through the pinching point, and the adhesive point between the core paper and the liner is scrubbed from above the liner, destroying the solidification of the paste and sticking. It has caused a problem that results in bad results.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the problems inherent in the above-mentioned prior art, and has been proposed in order to solve the problems. A single-sided corrugated board in which a core paper and a liner are bonded to each other is proposed. When manufacturing a single-sided corrugated board, it is possible to reduce vibration and noise generated during the manufacturing and press marks generated on the liner side, and the structure that can reliably bond the core paper and the liner is simple and highly economical. An object is to provide a manufacturing apparatus.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and preferably achieve the intended purpose, the present invention provides a first stage roll having a corrugated step portion on its outer peripheral surface, and this corrugated step portion. A corrugated step portion that meshes with the outer peripheral surface, and a second corrugating roll that performs a required corrugation step on the core paper that is passed between the corrugated corrugated paper and the first corrugating roll; A gluing mechanism for gluing the top portion of the paper, and an outer peripheral surface of the second-stage roll and a feeding path of a liner to be bonded to the core paper are provided, and the gluing mechanism is provided. In a single-sided corrugated board manufacturing apparatus provided with a plurality of press rolls which presses a liner onto a core paper fed along the outer peripheral surface and presses the liner, the peripheral speed of each press roll is set to
It is characterized in that the speed of the liner is matched with the speed of the liner at the pinching point where the liner is pressed against the core paper by the corrugated roll.

In order to achieve the above-mentioned object, another invention of the present application is that a first stage roll having a corrugated step portion formed on the outer peripheral surface and a corrugated step portion meshing with the corrugated step portion are formed on the outer peripheral surface, A second-stage roll for forming a desired step on the core paper that is passed between the first-stage roll, a gluing mechanism for performing gluing on the top of the corrugated core paper, and The liner is provided on the core paper that is provided on the outer peripheral surface of the two-stage roll and in the vicinity of the feed path of the liner that is bonded to the core paper, and that is fed along the outer peripheral surface of the second roll. In a single-sided corrugated board manufacturing apparatus provided with a plurality of press rolls that are pressed against each other and bonded together, of the plurality of press rolls, downstream from a paper feed side press roll located on the most upstream side in the feeding direction of the core paper and liner The peripheral speed of other press rolls located on the side,
It is characterized in that the liner speed is made to coincide with the speed of the liner at the pinching point where the liner is pressed against the core paper by the press roll and the second-stage roll.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a single-sided corrugated cardboard manufacturing apparatus according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments.

[0010]

[First Embodiment] FIG. 1 schematically shows the construction of a single-faced corrugated board manufacturing apparatus according to the first embodiment. The frame main body 10 has a first-stage roll having corrugated steps formed on the outer peripheral surface thereof. 12 and a second stage roll 14, which also has a corrugated step portion on its outer peripheral surface, are rotatably supported. The rotation shaft of the first-stage roll 12 is positioned obliquely above the rotation shaft of the second-stage roll 14, and the respective corrugated steps are meshable via a core paper 16 (described later). Also, the first roll 1
A gluing mechanism 22 including a gluing roll 18 and a doctor roll 20 is disposed immediately below the second roll diagonally below the second stage roll 14. The core paper 16 is supplied from a base paper supply source (not shown) on the left side in FIG. 1 through a plurality of guide rolls 24 to a meshing region of the first stage roll 12 and the second stage roll 14 and passes through the region. By doing so, the required step formation is performed. The core paper 16 on which the step is formed is pasted by the pasting mechanism 22 on the top of the step, and then the feeding direction is reversed along the outer peripheral surface of the second step roll 14 to go upward. The liner 26 is a raw paper source on the right side in FIG.
(Not shown) is supplied to the second stage roll 14 through the preheaters 28, 28 heated by two rolls of steam, and the upper part in the state where the core paper 16 is joined to the glued stage top part. Sent to. In addition, high-temperature steam from a supply source (not shown) is also circulated inside the guide roll 24,
It is configured to heat the core paper 16.

The gluing mechanism 22 is opened to the first-stage roll 12 and the second-stage roll 14 side, and its opening is
It is housed in a pressurizing chamber 32 in a substantially hermetically sealed state in which the space between the first stage roll 12 and the seal roll 30 arranged immediately below the second stage roll 14 is sealed. In the pressurizing chamber 32,
Compressed air is supplied from a supply source (not shown), and the pressure inside the room is set to be slightly higher (for example, 0.15 atm). In this case, the outer surface side of the second-stage roll 14 facing the pressurizing chamber 32 is at atmospheric pressure due to circumferential grooves (not shown) formed at predetermined intervals in the axial direction. Therefore, the core paper 16 formed by passing between the first and second rolls 12 and 14 forms the pressure chamber 32 and the second roll 1.
A stable transfer is achieved while being pressed against the roll surface due to the pressure difference with the outer surface of No. 4. The core paper 16 which is turned upside down along the outer surface of the second-stage roll 14 and is directed upward has two press rolls 3 described later.
The liner 26 is securely bonded to the liner 26 via the pins 4, 36. As a means for holding the core paper 16 on the outer peripheral surface of the second roll 14, the negative pressure inside the roll 14 is applied to the outer periphery of the second roll 14 through a through hole formed in the circumferential groove. A configuration in which the core paper 16 is suction-held on the surface can also be adopted.

Two press rolls 3 for sticking the core paper 16 and the liner 26 together with the second-stage roll 14 on the side opposite to the first-stage roll 12 with the second-stage roll 14 interposed therebetween.
4, 36 are arranged apart from each other in the circumferential direction of the second stage roll 14. That is, as shown in FIG. 1, the first press roll 34 on the paper feed side is rotatably arranged at a lower position on the outer peripheral surface of the second stage roll 14 and near the feeding path of the liner 26. The core paper 16 fed along the outer peripheral surface of the two-stage roll 14 and the liner 26 bonded to the core paper 16 are pressed against the second-stage roll 14. A second press roll 36 on the sheet discharge side is rotatably disposed at an upper position on the outer peripheral surface of the second-stage roll 14 and close to the feeding path of the liner 26. The core paper 16 and the liner 26 fed along the outer peripheral surface are pressed against the second-stage roll 14. That is, the first press roll 34 and the second press roll 36 are the second stage roll 14
On the outer peripheral surface and close to the liner feeding path in a vertical relationship. Then, the liner 2 passing through the preheater 28
First, 6 is a bonding area (second stage roll 14 and first roll 14) along the outer peripheral surface of the first press roll 34 on the paper feed side with the core paper 16.
After being supplied to the press roll 34, the pressure is applied to the area where the second press roll 36 and the second roll 14 on the paper discharge side are bonded. In the embodiment, both press rolls 34 and 36 and preheaters 28 and 28 are used.
Is disposed on a moving frame 38 configured to be movable with respect to the frame main body 10 on which the step rolls 12 and 14 are disposed, and both press rolls 34 and 36 are connected to the second stage roll 1
4 and the retracted position separated from the second stage roll 14 can be positioned.

The both press rolls 34 and 36 are connected to a high temperature steam supply source (not shown), and are configured so that high temperature steam is circulated in the rolls to raise the temperature of the roll surface to a required temperature. Then, the liner 26 that comes into contact with the press rolls 34, 36 is heated, and heat is applied to the glued portion between the core paper 16 and the liner 26 to accelerate the gelation of the starch-based paste and adhere to the core paper 16. Is configured to ensure that. It should be noted that the first press roll 34 comes into contact with the seal roll 30 when the moving frame 38 is positioned at the operating position, and can hold the pressurizing chamber 32 in a sealed state.

The press rolls 34, 36 are configured to be movable toward and away from the second-stage roll 14 by an independent eccentric mechanism 40, respectively.
In addition to the thickness, the nip pressure can be set appropriately according to the material and the like. As the eccentric mechanism 40, for example, one having the configuration shown in FIG. 2 is adopted, so the eccentric mechanism 40 on the first press roll 34 side will be described. That is, the rotating shaft 34a of the first press roll 34 is rotatably inserted and fitted through the bearing 44 into the through hole 42a of the race 42 that is rotatably supported by the moving frame 38. There is. The race 42 is integrally formed with a fan-shaped gear 42b on a part of its peripheral surface, and has a center P _{1 of the} through hole 42a (the rotation shaft 34a of the first press roll 34).
The center) and the center P ₂ race outer peripheral surface are designed to deflect by a required dimension x. The sector gear 42b meshes with a pinion gear 46 that is rotatably supported by the moving frame 38, and this pinion gear 46 is connected to a motor 48 arranged on the moving frame 38 so that a required rotation is provided. Has become. That is, when the motor 48 is driven to rotate the pinion gear 46, the fan-shaped gear 42b meshing with the pinion gear 46 rotates together with the race 42. At this time, the center P ₂ of the outer peripheral surface of the race 42 in which the fan-shaped gear 42b is formed and the center P _{1 of the} through hole 42a are deviated by the required dimension x as described above. Accordingly, the first press roll 34 moves eccentrically. As a result, the axial distance between the first press roll 34 and the second-stage roll 14 is changed, and the first press roll 34 and the second-stage roll 1 are changed.
4 and the nip pressure can be adjusted. The eccentric mechanism 40 is disposed on both sides of the first press roll 34 in the axial direction, and drives the pair of motors 48, 48 synchronously to drive the first press roll 34.
The press roll 34 is eccentrically moved.

Here, the nip pressure of the second press roll 36 is a value at which the core paper 16 and the liner 26 initially bonded by the first press roll 34 can be auxiliary bonded (first
It is set to a value smaller than the nip pressure of the press roll 34). However, the total sum of the nip pressures of both press rolls 34 and 36 is set within a range that is equivalent to the nip pressure when one press roll is used. The diameter of the first press roll 34 shown in FIG. 1 is set to be larger than the diameter of the second press roll 36, but the diameters of both rolls 34, 36 may be the same.

As shown in FIG. 3, a control signal generated from a production speed command device 52 is applied to a first motor 50 as a driving means for rotating the second stage roll 14 via a motor drive control device 54. It is given a second speed at the peripheral speed corresponding to the feeding speed (line speed) of the core paper 16 and liner 26.
The corrugated roll 14 is controlled to rotate. The power of the first motor 50 is mechanical power splitting means such as a gear.
It is transmitted to the first press roll 34 at a required fixed reduction ratio via (not shown), and the press roll 34
It is configured to be rotationally driven at the same peripheral speed as the peripheral speed of the corrugated roll 14. That is, the peripheral velocities of the second-stage roll 14 and the first press roll 34 are set to be the same as the velocities of the core paper 16 and the liner 26 that pass through the bonding area (compression point) by the rolls 14 and 34. There is.

As shown in FIG. 3, the second press roll 36 is connected to a second motor 58 as a drive means capable of variable speed control. The independent second motor 58 rotates the second press roll 36. It is configured to be driven. Further, the second motor 58 is connected with a load current detector 60 as a detecting means for detecting the load current of the motor 58, and a detection signal (load current value M) of the load current detector 60 is a control means for driving and controlling the second motor 58. Drive control device 62 as
It is supplied to. Then, in the motor drive control device 62, the peripheral speed of the second press roll 36 is determined based on the detection signal from the load current detector 60.
The surface side of the liner 26 that passes through the bonding area (clamping point) between the second stage roll 14 and the second stage roll 14 (the side that contacts the second press roll 36)
Is set to control the rotation of the second motor 58. The motor drive control device 62 is supplied with a control signal generated from the production speed command device 52.

Here, the control contents of the motor drive control device 62 will be described in detail. The second press roll 36
The peripheral speed of VP, the second stage roll 14 and the second press roll 3
When the speed of the liner 26 in the bonding area with 6 is VL, the relationship between the load current value M and VP / VL is the graph shown in FIG. That is, when VP = VL, since the peripheral speed of the second press roll 36 and the speed of the liner 26 match and synchronous feed is performed, the second motor 5 at this time
The load current value M of No. 8 matches the idle current value C when the second press roll 36 is rotationally driven at the speed VL in the unloaded state (M = C). Further, when VP <VL, the force for further rotating the liner 26 acts on the second press roll 36, so that the load current value M of the second motor 58 at this time becomes smaller than the idling current value C (M <C). Further, when VP> VL, the force for braking the liner 26 acts on the second press roll 36, and the load current value M of the second motor 58 at this time becomes larger than the idle current value C ( M> C). Based on such a relationship, in the motor drive control device 62, the load current value M detected by the load current detector 60 is compared with the idling current value C so that the load current value M = idling current value C. The second motor 58
Is controlled to match the peripheral speed of the second press roll 36 with the speed of the liner 26. In addition,
The idling current value C is measured by previously driving the second press roll 36 to rotate at each speed in an unloaded state.

[0019]

Next, the operation of the single-sided cardboard manufacturing apparatus according to the first embodiment will be described.
In the production of single-sided corrugated board, the first press roll 34 is used.
Also, the second press roll 36 is brought close to the second-stage roll 14, and the core paper 16 and the liner 26 fed along the outer peripheral surface of the second-stage roll 14 are fed to both the press rolls 34, 3.
In step 6, the surface of the corrugated roll can be pressed. In this case, the nip pressure of both press rolls 34, 36 is set to be smaller than the nip pressure of the configuration using one conventional press roll, and the total is set to be substantially the same as the conventional nip pressure. is there. The nip pressure of the first press roll 34 is set to be higher than the nip pressure of the second press roll 36.

The first and second rolls 12, 14 are rotationally driven, and the first press roll 34 is rotationally driven by the power transmitted from the first motor 50.
Further, the second press roll 36 is rotationally driven by the second motor 58. In this state, the guide roll 2 from the base paper supply source
The core paper 16 supplied to the meshing region between the first-stage roll 12 and the second-stage roll 14 via 4 passes through the region to form a desired stage. The corrugated core paper 16 in which the step is formed is pasted to the top of the step by the pasting mechanism 22, and then the feeding direction is reversed along the outer peripheral surface of the second step roll 14 to move upward (FIG. 1).

Further, the preheater 2 is supplied from the raw paper supply source.
The liner 26 supplied through the rollers 8 and 28 is supplied to the bonding area between the second stage roll 14 and the first press roll 34. The liner 26 is clamped between the first press roll 34 and the second stage roll 14 on the step top portion of the core paper 16 so that both 16 and 26 are initially bonded. The peripheral speed of the first press roll 34 is rotationally controlled so as to always match the peripheral speed of the second stage roll 14. That is, since the speed of the liner 26 passing through the bonding area between the second-stage roll 14 and the first press roll 34 and the peripheral speed of the first press roll 34 are the same, the roll 34 moves to the liner 26. Since there is no strong force on the fir, the core paper 16 and the liner 2
Poor bonding with 6 does not occur. The first press roll 3
The nip pressure by 4 is efficiently applied to the core paper 16 and the liner 26, and the initial adhesion of the both 16 and 26 is surely achieved.

The core paper 16 and the liner 26, which are pressed and initially bonded by the second-stage roll 14 and the first press roll 34, are then bonded to the second-stage roll 14 and the second press roll 36. It is supplied to the area, where the core paper 16 and the liner 26 are completely bonded, and the single-faced corrugated board S is manufactured.

During the manufacture of the single-sided corrugated board S, the second motor 58 detected by the load current detector 60.
The load current value M of is supplied to the motor drive control device 62. Then, the control device 62 compares the idling current C and the load current value M at each speed obtained in advance,
Second motor 5 so that idle current C = load current value M
8 is rotation controlled. As a result, the peripheral speed VP of the second press roll 36 that is rotationally driven by the second motor 58 matches the speed VL of the liner 26 that passes through the bonding region between the press roll 36 and the second stage roll 14. That is, there is no difference in speed between the second press roll 36 and the liner 26 (bonding region), and the second press roll 36 exerts a force on the liner 26 against the liner 26. Does not work, and bonding failure does not occur. Therefore, the core paper 16 and the liner 26 can be reliably bonded together.

As described above, in the first embodiment, since the core paper 16 and the liner 26 are adhered to each other by the two press rolls 34 and 36, the nip pressure between the press rolls 34 and 36 is set to one press roll. It can be set smaller than the case where a roll is used, and it is possible to significantly reduce the vibration and noise generated during the production of the single-faced corrugated board, and also reduce the press marks produced on the liner side of the single-faced corrugated board. Moreover, the peripheral speed of the first press roll 34 on the paper feed side located on the most upstream side of the core paper 16 and the liner 26 in the feeding direction is mechanically coupled to the first motor 50 of the second stage roll 14 and is the same. Since the liner 26 and the first press roll 34 are configured to rotate at the peripheral speed, a speed difference is not generated between the liner 26 and the first press roll 34, and the initial adhesion between the core paper 16 and the liner 26 can be surely achieved. In addition, the second side on the paper discharge side located on the most downstream side in the feeding direction.
The peripheral speed of the press roll 36 is
The liner 2 that passes through the bonding area (clamping point) with the corrugated roll 14
Since the rotation is controlled so as to always match the speed of No. 6, the core paper 16 and the liner 26 are not rubbed at their adhesion points or pulled upstream or downstream to be peeled off. Adhesive bonding in the liner 26 can be reliably achieved.

[0025]

[Second Embodiment] FIG. 5 schematically shows the construction of a single-faced corrugated board manufacturing apparatus according to a second embodiment of the present invention. It is different from the above-described first embodiment in two corrugated rolls 12. ,
The arrangement relationship of 14 is different. That is, the second-stage roll 14 is rotatably and pivotally supported diagonally above the first-stage roll 12 that is rotatably supported by the frame body 10, and the respective corrugated steps are meshed via the core paper 16. It is possible. A gluing mechanism 22 housed in a pressurizing chamber 32 is arranged laterally of the first roll 12 and obliquely below the second roll 14. The core paper 16 is supplied from a base paper supply source (not shown) on the right side in FIG. 5 to a meshing region between the first-stage roll 12 and the second-stage roll 14 via a plurality of guide rolls 24,
The required step formation is performed by passing through the area.
The corrugated core paper 16 on which the step is formed is pasted to the top of the step by the pasting mechanism 22 and then the second step roll 14
The feed direction is reversed along the outer peripheral surface of the and goes upward.
The liner 26 is a base paper supply source (not shown) on the left side in FIG.
Is supplied to the second-stage roll 14 through a plurality of preheaters 28, and is fed upward in a state of being bonded to the top of the core paper 16 to which the glue is applied.

Two press rolls 34, 36 are horizontally arranged above the second stage roll 14 so as to be separated from each other in the circumferential direction of the second stage roll 14. That is, the upstream side in the feeding direction of the core paper 16 fed along the outer peripheral surface of the second roll 14.
The first press roll 34 on the paper feed side is rotatably arranged on the left side (FIG. 5), and the second press roll 36 on the paper discharge side is rotatably arranged on the downstream side (right side in FIG. 5). Set up. Then, the core paper 16 fed along the outer peripheral surface of the second stage roll 14 and the liner 26 attached to the core paper 16 are
The press rolls 34, 36 and the second-stage roll 14 are sandwiched and bonded together. Also in the second embodiment, the nip pressure of the first press roll 34 is set higher than the nip pressure of the second press roll 36, and the nip pressure of the second press roll 36 is initially set by the first press roll 34. Bonded core paper 16 and liner 2
6 and 6 are set to a value capable of auxiliary bonding.

The drive control system in the second embodiment is the same as that in the first embodiment, and as shown in FIG. 6, both are controlled by the first motor 50 connected to the second stage roll 14 and the first press roll 34. The rolls 14 and 34 are configured to be rotationally driven at peripheral speeds that match the feeding speeds of the core paper 16 and the liner 26. The second press roll 36 is rotatably driven by a second motor 58 whose speed is controlled by the motor drive controller 62. Then, the second motor 58 is controlled by the control device 62 based on the load current value M detected by the load current detector 60, so that the peripheral speed of the second press roll 36 is controlled to be the same as that of the roll 36 and the second stage. It is set so as to always match the speed of the liner 26 passing through the bonding area (clamping point) with the roll 14.

Therefore, also in the second embodiment, the first press roll 34 is configured to rotate at the same peripheral speed as the peripheral speed of the second stage roll 14, and the peripheral speed of the second press roll 36 is the same as that of the second roll 14. Since the rotation is controlled so as to always match the speed of the liner 26 passing through the pinching point between the pressure roller 36 and the second-stage roll 14, the adhesion point between the core paper 16 and the liner 26 is scooped up, or upstream or downstream. It is possible to surely achieve gluing and adhesion in the core paper 16 and the liner 26 without pulling them to the side and peeling them off. Further, the vibration and noise generated during the production of the single-sided corrugated board can be remarkably reduced, and the press mark generated on the liner side of the single-sided corrugated board can be also reduced, as in the first embodiment.

[0029]

[Modifications] In each of the above-described embodiments, the case where the peripheral speed of the second press roll 36 is controlled by detecting the load current of the second motor 58 has been described, but the present invention is not limited to this. Absent. For example, as shown in FIG. 7, a speed sensor 64 as a detection means is provided at a position close to the liner side of the single-sided corrugated board S immediately after passing through the bonding area between the second stage roll 14 and the second press roll 36. In addition, the detection signal from the speed sensor 64 is sent to the second motor 5
8 is input to a motor drive control device 66 that controls rotation. Then, in the motor drive control device 66, the speed of the surface side of the liner 26 (the side which contacts the second press roll 36) detected by the speed sensor 64 and the peripheral speed of the second press roll 36 match so that the second motor 58 is driven and controlled. Thereby, the peripheral speed of the second press roll 36 is
It will always match the speed of liner 26, and liner 2
It is possible to prevent squeezing 6 to cause a bonding failure.

Here, the first press roll 3 in the state where the single-faced corrugated board S in which the core paper 16 and the liner 26 are securely bonded together is manufactured by the single-sided corrugated board manufacturing apparatus.
Observing the relationship between the peripheral speed of No. 4 and the peripheral speed of the second press roll 36, the peripheral speed of the second press roll 36 is slower than the peripheral speed of the first press roll 34. This is the liner 26 that is fed while contacting both press rolls 34, 36.
Is heated and dried by the heat applied from the press rolls 34 and 36, the first press roll 34 to the second press roll 34
This is because shrinkage occurs while reaching the press roll 36. That is, the liner 26 contracts while being fed, so that the speed of the liner 26 in the bonding region between the second-stage roll 14 and the first press roll 34 is the same as that of the second-stage roll 14 and the second press roll 34. The peripheral speed of the second press roll 36, which is slower than the speed in the bonding region with 36, and as a result is rotationally controlled to be the same as the speed of the liner 26, is slower than the peripheral speed of the first press roll 34. It will be. Therefore, for example, by connecting the second press roll 36 to the first motor 50 at a required speed reduction ratio based on the contraction of the liner 26, the second press roll 36 is rotationally driven so as to be always slower than the peripheral speed of the first press roll 34. Also, it becomes possible to prevent the bonding failure between the core paper 16 and the liner 26 by the second press roll 36.

An experiment conducted for confirming the shrinkage of the liner 26 will be additionally described. In the single-faced corrugated board manufacturing apparatus having the configuration shown in FIG. 1, the liner 26 before being supplied from the base paper supply source to the first press roll 34. In addition, two points were marked at predetermined intervals in the feeding direction. And
The separation distance between the two marks on the liner side of the single-faced corrugated board S produced by passing through the bonding area between the second press roll 34 and the second stage roll 14 was measured. As a result, it was confirmed that the mark spacing after the liner 26 was attached was reduced by about 0.3% from the mark spacing before the attachment. Therefore, the ratio of the peripheral speed of the first press roll 34 and the peripheral speed of the second press roll 36 is determined by the contraction rate of the liner 26 (0.3
%) Should be set to a value commensurate with.

Further, in each of the embodiments, the core paper and the liner are laminated with two press rolls, but the present application is not limited to this, and three or more press rolls are used as the second stage. It is also possible to adopt a configuration in which the roll is arranged close to the outer periphery thereof. For example, as shown in FIG. 8, the first press roll 34 disposed near the outer circumference of the second stage roll 14
And the second press roll 36 between the third press roll 68.
Is arranged, and the core paper 16 and the liner 26 are bonded together by these three press rolls 34, 36, 68. In addition, the third press roll 68, the second press roll 3
Similar to 6, the independent third motor 72 capable of variable speed control is connected via the motor drive control device 70, and the load current value of the third motor 72 detected by the load current detector 74 is connected to the motor drive control device 70. To be supplied to.
Then, based on the detection signal from the load current detector 74, the peripheral speed of the third press roll 68 is controlled by the motor drive control device 70 so that the bonding area between the roll 68 and the second-stage roll 14 is increased.
The third motor 72 is rotationally controlled so as to have the same speed as the surface side of the liner 26 passing through the (clamping point). That is, in the configuration shown in FIG. 8, the second press roll 36 and the third press roll 68 are controlled so as to rotate at the same peripheral speed as the speed of the liner 26 passing through the bonding area with the second stage roll 14. Press rolls 36 and 68 and liner 2
Bonding failure due to the speed difference from 6 is prevented. In addition,
In the configuration using the three press rolls 34, 36, 68, as shown in FIG. 7, the speed of the liner 26 immediately after the second press roll 36 and the third press roll 68 have passed through the bonding area. It is also possible to employ a configuration in which the rotation control is performed based on the detection value detected by the corresponding speed sensor for detection.

7 and 8 have been described in the case of the first embodiment in which the roll arrangement of the first-stage rolls 12 and the second-stage rolls 14 is shown in FIG. 1, the second embodiment shown in FIG. Of course, it may be a roll arrangement. Further, in a configuration using three or more press rolls, the shrinkage ratio of the liner at the position where each press roll is arranged is obtained in advance, and the shrinkage ratio corresponding to each peripheral speed of the press roll on the most upstream side corresponds to each shrinkage ratio. It is also possible to set the peripheral speed of the press roll on the downstream side at a slower speed.

[0034]

As described above, according to the single-faced corrugated board manufacturing apparatus according to the present invention, by virtue of the constitution in which a plurality of press rolls are arranged, the vibration and noise generated during the production of the single-sided corrugated board can be remarkably reduced, and the single-sided corrugated board can be reduced. The press marks generated on the liner side of the corrugated board can be reduced together. In addition, the peripheral speed of each press roll is made to match the speed of the liner at the pinching point where the liner is pressed against the core paper by the press roll and the second-stage roll. It is possible to reliably prevent the occurrence of a defective bonding between the core paper and the liner due to the difference in speed between the core paper and the liner.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a single-sided corrugated board manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing an eccentric mechanism of a first press roll according to the first embodiment.

FIG. 3 is a control block diagram of the manufacturing apparatus according to the first embodiment.

FIG. 4 is a graph showing a relationship between a load current value and VP / VL.

FIG. 5 is a schematic configuration diagram showing a single-sided corrugated board manufacturing apparatus according to a second embodiment of the present invention.

FIG. 6 is a control block diagram of a manufacturing apparatus according to a second embodiment.

FIG. 7 is a control block diagram of a single-sided corrugated board manufacturing apparatus according to a modification.

FIG. 8 is a control block diagram of a single-sided corrugated board manufacturing apparatus according to another modification.

[Explanation of symbols]

 12 1st-stage roll 14 2nd-stage roll 16 Core paper 22 Gluing mechanism 26 Liner 34 1st press roll (paper feed side press roll) 36 2nd press roll (paper discharge side press roll) 50 1st motor (drive) Means) 58 second motor (driving means) 60 load current detector (detecting means) 62 motor drive control device (control means) 64 speed sensor (detection means) 66 motor drive control device (control means) C idling current value M load Current value

Claims (6)

[Claims] 1. A first roll (12) having a corrugated step formed on an outer peripheral surface thereof, and a corrugated step formed on the outer peripheral surface to be meshed with the corrugated step. A second-stage roll (14) for forming a required stage on the core paper (16) passed therebetween;
A gluing mechanism (22) for gluing the stepped portion of the corrugated core paper (16), and the outer peripheral surface of the second corrugated roll (14) and the pasting paper (16) The liner (26) is placed in close proximity to the liner (26) feeding path, and the liner (26) is pressed against the core paper (16) fed along the outer peripheral surface of the second stage roll (14). In a single-sided corrugated board manufacturing apparatus provided with a plurality of press rolls (34, 36) to be laminated, the peripheral speed of each of the press rolls (34, 36) is set to the corresponding press roll (34, 36) and second stage roll ( An apparatus for producing single-faced corrugated board, characterized in that the liner (26) and the speed of the liner (26) at the pinching point where the liner (26) is pressed against the core paper (16) according to (14) are respectively matched. 2. A first stage roll (12) having a corrugated step portion formed on the outer peripheral surface thereof, and a corrugated step portion meshing with the corrugated step portion formed on the outer peripheral surface of the first step roll (12). A second-stage roll (14) for forming a required step on the core paper (16) that is passed between
A gluing mechanism (22) for gluing the stepped portion of the corrugated core paper (16), and the outer peripheral surface of the second corrugated roll (14) and the pasting paper (16) The liner (26) is placed in close proximity to the liner (26) feeding path, and the liner (26) is pressed against the core paper (16) fed along the outer peripheral surface of the second stage roll (14). In a single-sided corrugated board manufacturing apparatus having a plurality of press rolls (34, 36) to be laminated, among the plurality of press rolls (34, 36), the core paper (16)
And the peripheral speed of the other press roll (36) located downstream of the paper feed side press roll (34) located on the most upstream side of the liner (26) in the feeding direction, Corrugated roll (1
4) A single-sided corrugated board manufacturing apparatus, characterized in that it is configured to match the speed of the liner (26) at a pinching point where the liner (26) is pressed against the core paper (16) according to (4). 3. The paper feed side press roll (34) located on the most upstream side in the feeding direction of the core paper (16) and the liner (26) is a driving means (50) for the second stage roll (14). ) Is mechanically coupled to the paper feed side press roll (3
The single-faced corrugated board manufacturing apparatus according to claim 1 or 2, wherein the other press roll (36) located downstream of (4) is rotationally driven by an independent drive means (58) which is controlled at a variable speed. 4. A detection means (60) for detecting a load current of a drive motor (58) as a drive means for rotationally driving the other press roll (36), and a load detected by the detection means (60). The drive motor (58) has a variable speed so that the current value (M) becomes the same as the idle current value (C) when the press roll (36) rotatably driven by the drive motor (58) idles at each speed. The single-faced corrugated board manufacturing apparatus according to claim 3, further comprising control means (62) for controlling. 5. The liner (26) immediately after passing through a pinching point where the liner (26) is pressed against the core paper (16) by the other press roll (36) and the second stage roll (14). A detection means (64) for detecting a speed, and a control means (66) for variable speed control of the drive motor (58) as the drive means based on a value detected by the detection means (64) Item 3. The single-sided corrugated board manufacturing apparatus according to Item 3. 6. The circumference of another press roll (36) located downstream of the paper feed side press roll (34) located on the most upstream side in the feeding direction of the core paper (16) and the liner (26). The single-sided corrugated board manufacturing apparatus according to any one of claims 1 to 5, wherein the speed is set to be lower than the peripheral speed of the paper feed side press roll (34).