JPH07251470A - Single-faced corrugated cardboard manufacturing apparatus - Google Patents

Abstract

PURPOSE:To certainly perform lamination and to reduce vibration noise and a press mark generated during the manufacturing by arranging both main and auxiliary press bonding means containing an endless belt or a cylinder when core paper and a liner are laminated to produce single-faced corrugated cardboard. CONSTITUTION:Core paper 16 is passed through the nip between upper and lower corrugated rolls 12, 14 having corrugation parts to be corrugated and pasting is applied to the ridge parts of the corrugations of the core paper 16 by a pasting mechanism 22 and a liner 26 is laminated to the core paper at the ridge parts of corrugations to produce single-faced corrugated cardboard. In this case, a main press bonding means 30 bringing the core paper 16 and the liner 26 into contact with the lower corrugated roll 14 under pressure is constituted by training an endless belt 38 over three rolls 32, 34, 36 in a freely runnable manner. Further, an auxiliary press bonding means 40 allowing the endless belt 38 to approach the lower corrugated roll 14 is constituted by connecting a plurality of press members 44 to a plurality of cylinders 72 energized and controlled independently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main pressure-bonding means and a lower roll for pressing a core paper and a liner to manufacture a single-sided corrugated board in which the two are bonded together. The present invention relates to a single-sided corrugated board manufacturing apparatus provided with a supplementary auxiliary pressure bonding means.

[0002]

2. Description of the Related Art In a single-sided corrugated board manufacturing apparatus (so-called single facer), an upper roll and a lower roll each having a corrugated stepped portion on a circumferential surface are arranged in a vertical relationship on a frame so that they mesh with each other at the stepped portion. A press roll is rotatably disposed and is pressed against the lower roll via a core paper and a liner, which are raw papers for single-faced corrugated board. That is, the core paper is supplied between the upper roll and the lower roll, and a required step portion (flute) is formed when passing between the both rolls. A starch-based sizing agent is applied to the top of the obtained corrugation by a sizing roll provided in a sizing mechanism. Further, the liner supplied through the press roll from the opposite side of the core paper is pinched between the press roll and the lower roll at the top of the core paper, and the core paper and the liner are bonded together. A single-sided corrugated board is manufactured by.

The press roll used in the conventional single-faced corrugated board manufacturing apparatus is composed of a large-diameter metal roll body, and the roll is constantly urged toward the lower roll and passes between the two rolls. And to apply the required nip pressure to the liner. In this case, since the outer peripheral surface of the lower roll is formed with a step portion consisting of a continuous mountain portion and a valley portion at a required pitch, the pressure contact position of both rolls is from the mountain portion to the valley portion or from the valley portion to the mountain portion. When it moves to, its center of rotation changes slightly. With the rotation of both rolls,
As a result of the centers of rotation of both rolls coming closer and closer to each other periodically, large vibration and high noise are generated during the production of single-faced corrugated board, which is a cause of serious damage to the factory environment. Further, since both the press roll and the lower roll are made of a hard metal, the peaks of the lower roll come into contact with the surface of the press roll to periodically give an impact (so-called hammer phenomenon). Therefore, there has been a problem that a line-shaped pressing strip (so-called press mark) is attached in the lateral direction on the liner surface of the manufactured single-sided corrugated board at the pitch of the mountain portion of the lower roll.

As means for dealing with the above-mentioned various problems,
It has been proposed to press the core paper and the liner between the lower roll by an endless belt instead of the press roll made of a metal roll. That is, by arranging the endless belt so that it can run freely near the lower roll, and by bringing the endless belt near the outer surface of the lower roll, the core paper and liner passing between the roll and the endless belt are provided. It is configured to be pressed and laminated. When the endless belt is used in this way, it is possible to suppress the generation of large vibration and high noise, and it is possible to prevent the single-faced corrugated board from being provided with a press mark.

[0005]

In the above-mentioned single-sided corrugated board manufacturing apparatus, since the core paper mainly runs in the axial central portion of the corrugated roll, when the single-sided corrugated board is manufactured for a long time, The central portion of the corrugated roll on which the core paper runs is worn and the diameter of the roll is reduced. On the other hand, since the vicinity of both axial ends of the corrugated roll is scarcely worn, when the endless belt is brought close to the corrugated roll, it is regulated by the shaft end of the corrugated roll which is not worn and is kept at the central portion. However, there is a problem in that the core paper and the liner may be stuck poorly as a result.

Further, in the pressure-bonding mechanism provided with the endless belt, by applying a required tension to the endless belt, the core paper and the liner are sandwiched between the belt and the lower roll at a required pressure. In this case, the tension in the width direction of the endless belt (the axial direction of the lower roll) tends to be strong at both end portions and weak at the central portion, and it is not possible to give uniform tension over the entire length in the width direction. Have difficulty. That is, the sandwiching force applied to the central portion of the core paper and the liner in the width direction is weak, and reliable gluing and adhesion are not performed at the portions, which causes a problem of sticking failure.

When a press roll composed of the metal roll body is used, high temperature steam is circulated inside the roll to raise the temperature of the roll surface to a required temperature, and the press roll and the lower roll are pressed against each other. Adhesion between the core paper and the liner can be ensured by applying sufficient heat to the glued portion between the core paper and the liner to promote gelation of the starch paste. However, when an endless belt is used, sufficient heat may be applied to the glued portion between the core paper and the liner at the portion where the belt sandwiches the core paper and the liner with the lower roll. It is difficult, especially when manufacturing thick single-sided corrugated board.

[0008]

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-faced corrugated board in which a core paper and a liner are bonded together is provided. Provided is a single-sided corrugated board manufacturing apparatus capable of reliably sticking the core paper and the liner to each other even when adopting a structure capable of reducing vibration and noise generated during the manufacturing and press marks generated on the liner side during manufacturing. The purpose is to do.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and preferably achieve an intended purpose, the present invention provides an upper roll having a corrugated step portion on an outer peripheral surface thereof and an engagement with the corrugated step portion. A corrugated step portion is formed on the outer peripheral surface, and a lower roll that performs a required step formation on a core paper that is passed between the upper roll and a corrugated step portion is glued to the step top portion of the corrugated core paper. In a single-sided corrugated board manufacturing apparatus that manufactures a single-sided corrugated board by laminating the core paper and the liner at the stepped portion where the glue is applied, the lower roll is sandwiched with the liner feed path interposed therebetween. An endless belt rotatably wound around at least three rolls arranged so as to face each other, and the core paper and liner fed by the belt along the outer peripheral surface of the lower roll to the lower roll. Main crimp for pressure contact And a sub pressure-bonding means that is disposed at a position facing the lower roll with an endless belt running along the outer peripheral surface of the lower roll sandwiched therebetween, and that brings the endless belt closer to the lower roll. The pressure-bonding means has a surface facing the lower roll formed in an arc shape following the outer circumference of the roll, and the surface can be brought into contact with and separated from the endless belt, and is arranged along the axial direction of the lower roll. The pressing member is composed of a pressing member and a cylinder that is connected to each pressing member and is independently biased to be controlled. By biasing the cylinder to move each pressing member closer to the lower roll, the outer circumference of the lower roll The core paper fed along the surface and the liner attached to the core paper are configured to be pressed against the lower roll via the endless belt.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A single-faced corrugated board manufacturing apparatus according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. In the specification, the terms “upper roll” and “lower roll” do not necessarily limit the vertical positional relationship. Here, the corrugated roll on the side where the core paper is first introduced is called the "upper roll", and the corrugated roll on the side where the corrugated core paper and the liner are laminated is called the "lower roll". And

(Regarding Schematic Structure of Single-Sided Corrugated Cardboard Manufacturing Apparatus) FIG. 1 schematically shows the structure of a single-sided corrugated cardboard manufacturing apparatus according to an embodiment. A frame body 10 has corrugated steps formed on its outer peripheral surface. An upper roll 12 and a lower roll 14, which also has a corrugated step on its outer peripheral surface, are rotatably supported. The rotating shaft of the upper roll 12 is positioned obliquely above the rotating shaft of the lower roll 14, and the respective corrugated step portions are meshable via a core paper 16 (described later). Further, directly below the upper roll 12 and obliquely below the lower roll 14, a sizing roll 18 and a doctor roll 2 are provided.
A gluing mechanism 22 of 0 is provided. Core paper 16
1 is supplied from a base paper supply source (not shown) on the left side in FIG. 1 to a meshing region of the upper roll 12 and the lower roll 14 through a plurality of guide rolls 24, and a required step formation is achieved by passing through the region. Done. The core paper 16 with the step formation is
After the gluing mechanism 22 has glued the top of the step, the feeding direction is reversed along the outer peripheral surface of the lower roll 14 and goes upward. Further, the liner 26 includes two roll-shaped preheaters 2 from a raw paper supply source (not shown) on the right side in FIG.
It is supplied to the lower roll 14 via 8, 28 and the core paper 16
It is fed to the upper side in a state of being joined to the step-top portion to which the glue is applied. A plurality of circumferential grooves 14a are formed in the lower roll 14 at predetermined intervals in the axial direction, and by making the inside of the roll 14 a negative pressure, a through hole formed in the circumferential groove 14a.
The core paper 1 is attached to the outer peripheral surface of the lower roll 14 through (not shown).
6 is sucked and held, and stable feeding is performed. Inside the guide roll 24, high temperature steam from a supply source (not shown) is circulated to heat the core paper 16.

(Regarding the main pressure bonding mechanism) The lower roll 14
A main pressure-bonding mechanism 30 is disposed on the opposite side of the upper roll 12 with the lower roll 14 interposed therebetween to bond the core paper 16 and the liner 26 together. That is, as shown in FIG. 1, the preheating roll 32 is rotatably arranged at a lower position on the outer peripheral surface of the lower roll 14 in the frame main body 10 and close to the feeding path of the liner 26, and at the upper position. The drive roll 34 is rotatably arranged. Further, a tension roll 36 is rotatably arranged at a position separated from the outer peripheral surface of the lower roll 14, and an endless belt 38 is rotatably wound around these three rolls 32, 34, 36. Then, the preheating roll 32 and the driving roll 3
The endless belt 38, which faces the outer peripheral surface of the lower roll 14, approaches the outer peripheral surface of the lower roll 14, and the core paper 16 fed along the outer peripheral surface of the lower roll 14 and the liner 26 attached to the core paper 16 are The pressure is applied between the lower roll 14 and the lower roll 14. The liner 26 that has passed through the preheater 28
Is the endless belt 3 along the outer peripheral surface of the preheating roll 32.
It is supplied to the bonding area with the core paper 16 via 8. A seamless resin belt is preferably used as the endless belt 38.

The preheating roll 32 is connected to a supply source of high temperature steam (not shown), and is configured to cause high temperature steam to flow through the roll to raise the temperature of the roll surface to a required temperature. Then, the liner 26 is heated via the endless belt 38 wound around the preheating roll 32, and the core paper 16 is heated.
Heat is applied to the glued portion of the liner 26 and the liner 26 to accelerate the gelation of the starch-based paste and ensure the adhesion to the core paper 16. The drive roll 34 is connected to a drive source (not shown) of the single-sided corrugated board manufacturing apparatus so as to be rotationally driven, and the endless belt 38 is synchronized with the upper roll 12 and the lower roll 14 at a required speed. I am trying to drive. Further, the tension roll 36 is arranged so as to be movable in the radial direction of the lower roll 14 with respect to the frame body 10, and the lower roll 14 is urged by an urging means such as a cylinder (not shown).
The tension applied to the endless belt 38 is adjusted by moving the endless belt 38 closer to and away from. That is, the lower roll 14 is adjusted by adjusting the tension of the endless belt 38.
Core paper 16 and liner 2 fed along the outer peripheral surface of
The contact pressure of the endless belt 38 with respect to 6 is adjusted.

(Regarding the sub pressure bonding mechanism) The lower roll 14
On the opposite side of the lower roll 14 with the endless belt 38 abutting against the liner 26 fed along the outer peripheral surface of the liner 26. A crimping mechanism 40 is provided. As shown in FIGS. 1 and 2, the auxiliary pressure bonding mechanism 40 includes a plurality of pressing members 44 that are movable in the radial direction of the lower roll 14 in the axial direction of the lower roll 14. Each pressing member 44
Is set to have a length of, for example, about 100 to 150 mm in the axial direction of the roll 14, and has a required length in the circumferential direction of the roll 14, and the surface facing the lower roll 14 is the roll 14. Is formed in an arc shape following the outer periphery of the. Then, each pressing member 44 is independently urged by the corresponding air cylinder 72, and the endless belt 38,
The liner 26 and the core paper 16 are pressed against the lower roll 14. As the material of the pressing member 44, one that is softer than the endless belt 38 and has a small friction coefficient is preferably used because it is in sliding contact with the back surface of the endless belt 38. Further, it is recommended that the end portion of each pressing member 44 be positioned so as to correspond to the circumferential groove 14 a provided around the lower roll 14.

A bottom side of an air cylinder 72 is pivotally supported by a bracket 70 disposed and fixed to the frame body 10,
A support plate 76 is connected to the piston rod 72a of the air cylinder 72. A plurality of rods 8 are attached to the support plate 76.
The pressing member 44 is disposed and fixed via 0. The air cylinder 72 has an operating position in which the pressing member 44 is brought close to the lower roll 14 via the support plate 76, and the roll 14
The bias is controlled to move between the retracted position and the retracted position. That is, by urging the air cylinder 72 in the direction in which the piston rod 72a extends, the support plate 76
When the pressing member 44 moves to the operating position, the pressing member 44 is urged by the air cylinder 72 to move the endless belt 3
8, the lower roll 1 through the liner 26 and the core paper 16
Pressed to No. 4. When a load is applied to the pressing member 44 during the production of the single-faced corrugated board, the pressing member 44 retracts from the lower roll 14 against the urging force of the air cylinder 72, and an excessive load is applied to the sub pressure bonding mechanism 40. Is set to prevent.

[0016]

Next, the operation of the single-faced corrugated board manufacturing apparatus according to the above-described embodiment will be described. When manufacturing the single-sided corrugated board, the tension roll 36 is used as the lower roll 14
The preheat roll 32 and the drive roll 3 by applying a required tension to the endless belt 38.
4 by the endless belt 38 facing between the lower roll 14
The core paper 16 and the liner 26, which are fed along the outer peripheral surface of, are brought into a state in which they can be pressed against the roll surface. Further, in each of the air cylinders 72, the piston rod 72a is urged in the extending direction, the pressing members 44 are brought closer to the lower roll 14, and the endless belt 38 is evenly distributed over the entire length in the width direction. The liner 26 is ready for pressure contact.

While the upper and lower corrugated rolls 12 and 14 are rotationally driven, and the drive roll 34 is rotationally driven to run the endless belt 38, the upper roll 12 and the lower roll are fed from the raw paper supply source through the guide roll 24. The core paper 16 supplied to the meshing area with the roll 14 passes through this area to form a desired step. 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 lower roll 14 to go upward (see FIG. 1). ).

Further, the preheater 2 is supplied from the raw paper supply source.
The liner 26, which is supplied through the 8, 28,
The sheet is fed along the outer peripheral surface of the sheet 2 via the endless belt 38, and heads toward the area where the core paper 16 is attached. This liner 26
Is the endless belt 38 and the lower roll 14 over the required length.
Is sandwiched between the core paper 26 and the liner 26, and a single-faced corrugated board is manufactured by bonding the core paper 16 and the liner 26 together. In this case, since the endless belt 38 is pressed against the core paper 16 and the liner 26 with a uniform pressure over the entire length in the width direction by the plurality of pressing members 44, the endless belt 38 extends in the entire length in the width direction. A reliable bonding can be achieved. Further, since high temperature steam is circulated inside the preheating roll 32 to raise the temperature of the roll surface to a required temperature, the liner 26 is heated via the endless belt 38 wound around the preheating roll 32, The core paper 1
It is possible to apply heat to the gluing portion of 6 to accelerate the gelation of the starch-based sizing agent and ensure the adhesion with the core paper 16.

In the case of manufacturing a thick single-sided corrugated board as described above, when the amount of heat by the endless belt 38 heated by the preheating roll 32 cannot give sufficient heat to the glued portion of the core paper 16. There is. However, in the embodiment, since the core paper 16 and the liner 26 can be reliably pressed against each other by the plurality of pressing members 44, the insufficient amount of heat can be compensated for, and the both 16 and 26 can be reliably bonded. Further, when manufacturing a thin single-sided corrugated board, the core paper 16 and the liner 26 are provided only by the main pressure bonding mechanism 30.
Since it is possible to securely bond the above, the air cylinders 72 are reversely biased at this time and the pressing member 44 is pressed.
Is moved to the retracted position, the pressure by the member 44 is not applied to the core paper 16 and the liner 26. Further, in addition to the thickness of the core paper 16 and the liner 26, the pressure applied by the pressing member 44 can be adjusted according to the material and the like.

The sub-pressing mechanism 40 has a plurality of pressing members 44.
The pressure applied to the core paper 16 and the liner 26 can be adjusted by adjusting the length of the pressing member 44 (for example, 1
By finely adjusting in the unit of (0 to 150 mm), it is possible to finely respond to the range of the width of the core paper 16 and the liner 26 and the wear range of the lower roll 14. For example, when the diameter of the central portion of the lower roll 14 decreases due to wear due to the production of the single-sided corrugated board for a long time, the pressure of each pressing member 44 is variably adjusted to adjust the core paper 16 and the core paper 16. A uniform clamping force can be applied to the liner 26 over the entire length in the width direction,
Poor attachment of the core paper 16 and the liner 26 can be prevented.
Further, as described above, when manufacturing a thin single-sided corrugated board, the auxiliary pressure bonding mechanism 40 is not required, but the endless belt 38
Since the center of the tension becomes weaker in the width direction, it is possible to make the tension uniform over the entire length of the endless belt 38 in the width direction by using only the corresponding pressing member 44 to assist the tension. . Since the pressure by the pressing member 44 corresponding to the area where the core paper 16 and the liner 26 are not running can be released, no unnecessary biasing force acts on the lower roll 14 and the endless belt 38, and the roll 14 There is an advantage that abrasion of the belt 38 can be prevented.

(Regarding another embodiment of the sub pressure bonding mechanism) FIG.
It shows another embodiment of the sub-compression bonding mechanism, and its basic configuration is the same as that of the embodiment shown in FIG. However, with respect to the support plate 76 to which the piston rod 72a of the air cylinder 72 is connected, the pressing member 44 is arranged so as to be able to approach and separate via a plurality of rods 80 slidably inserted in the support plate 76. It is like this. In addition, the pressing member 44 and the support plate 7
6, a compression spring 82 is inserted between the compression springs 82 and 6 and is configured to constantly urge the pressing member 44 in a direction away from the support plate 76. That is, in another embodiment, the piston rod 72a
By urging the air cylinder 72 in the direction to extend
When the support plate 76 and the pressing member 44 move to the operating position, the pressing member 44 is pressed against the lower roll 14 via the endless belt 38, the liner 26 and the core paper 16 under the elastic force of the compression spring 82. It When a load is applied to the pressing member 44 during the production of single-sided corrugated board, the pressing member 44 is prevented from retracting from the lower roll 14 against the elastic force of the compression spring 82 and applying an excessive load to the sub pressure bonding mechanism 40. It is possible.

FIG. 4 shows still another embodiment of the sub-pressing mechanism, in which each pressing member 44 is provided on the outer bottom surface of the housing 42 having a U-shaped cross section and extending parallel to the lower roll 14.
The air cylinder 62 is arranged so as to correspond to the piston rod 62 facing the inside of the housing of the air cylinder 62.
A corresponding holder 64 slidably disposed inside the housing 42 is connected to a. And each holder 64
The pressing member 44 is disposed so as to be capable of approaching and separating via a plurality of rods 66 slidably inserted in the holder 64, and is compressed by each rod 66 facing between the pressing member 44 and the holder 64. A spring 68 is provided and is configured to constantly bias the pressing member 44 in a direction away from the holder 64. The air cylinder 62 is biased and controlled via the holder 64 so as to move between the operating position in which the pressing member 44 is brought close to the lower roll 14 and the retracted position in which it is separated from the roll 14. That is, when the holder 64 and the pressing member 44 are moved to the operating position by urging the air cylinder 62 in the direction of extending the piston rod 62a, the pressing member 44 is elastically urged by the compression spring 68. It is pressed against the lower roll 14 via the endless belt 38, the liner 26 and the core paper 16. When a load is applied to the pressing member 44 during the production of the single-sided corrugated board, the pressing member 44 resists the elasticity of the compression spring 68 and the lower roll 1
4 can be retracted to prevent an excessive load from being applied to the auxiliary pressure bonding mechanism 40. In addition, in another embodiment shown in FIG. 4, the pressing member 44 and the holder 6 are
4 is fixed via a rod 66 and a compression spring 68
Is omitted, and the pressing member 4 is pressed by the urging force of the air cylinder 62.
4 may be brought into pressure contact with the endless belt 38.

(Another embodiment of the single-faced corrugated board manufacturing apparatus) FIG. 5 schematically shows another embodiment of the single-sided corrugated board manufacturing apparatus according to the present invention. It is the same. However, just below the upper roll 12 and obliquely below the lower roll 14, the gluing mechanism 2
A pressure chamber 92 for accommodating 2 is provided. The pressurizing chamber 92 is opened to the upper roll 12 and the lower roll 14 side, and a seal is provided between the opening and a seal roll 94 arranged immediately below the upper roll 12 and the lower roll 14 to apply pressure. It is configured to hold the chamber 92 in a substantially sealed condition. Compressed air is supplied to the pressurizing chamber 92 from a supply source (not shown), and the pressure inside the chamber is set to a pressure slightly higher than the atmospheric pressure (for example, 0.15 atm). In this case, the lower roll 1 facing the pressurizing chamber 92
The outer surface side of 4 is a circumferential groove 14 formed at predetermined intervals in the axial direction.
It is atmospheric pressure due to a. Therefore, the core paper 16 that has been step-formed by passing between the upper and lower corrugating rolls 12 and 14 is stable in a state of being pressed against the roll surface by the pressure difference between the pressure chamber 92 and the outer surface of the lower roll 14. The transferred transfer is achieved. Then, along the outer surface of the lower roll 14, the feeding direction is reversed and the core paper 16 is directed upward.
Is reliably bonded to the liner 26 via the main crimping mechanism 30 and the sub crimping mechanism 40. The pressurizing chamber 92
In addition, the core paper 16 can be preheated by supplying high-temperature compressed air.

In the above-mentioned embodiment, the structure in which the lower roll is arranged below the upper roll which is rotatably supported by the frame body is described, but the present invention is not limited to this. For example, the lower roll is rotatably supported directly above the upper roll that is rotatably supported by the frame body, and the gluing mechanism is disposed diagonally below the lower roll. Further, it is also possible to adopt a configuration in which the main crimping mechanism and the sub crimping mechanism are arranged above the lower roll.

Although the air cylinder has been described as the urging means of the pressing member, the present invention is not limited to this, and a hydraulic cylinder can be used. Also, FIG.
It is possible not only to divide the pressing member in the axial direction of the lower roll as shown in, but also to divide the pressing member in the circumferential direction of the lower roll so that each pressing member can be independently biased. In addition,
The number of divisions of the pressing member can be set to an appropriate number according to the specifications of the single-faced corrugated board manufacturing apparatus.

[0026]

As described above, since the single-faced corrugated board manufacturing apparatus according to the present invention is provided with the main crimping mechanism and the sub-crimping mechanism, when the main crimping mechanism alone causes insufficient lamination of the core paper and the liner. However, since the auxiliary pressure bonding mechanism can compensate for the insufficient bonding, the core paper and the liner can be reliably bonded. Also, by using an endless belt as the main pressure bonding mechanism, it is possible to significantly reduce vibration and noise generated during the production of single-faced corrugated board,
The effect that the press mark generated on the liner side of the single-sided corrugated board can also be reduced is obtained. Even if the main crimping mechanism having a structure capable of reducing vibrations, noises and press marks is adopted in this way, the sub-crimping mechanism can compensate for the insufficient bonding by the main crimping mechanism.

Further, by disposing a plurality of pressing members along the axial direction of the lower roll, the central portion of the lower roll is worn over a long time in the production of single-faced corrugated board, and a portion having a large diameter in the axial direction is formed. Even if a small portion occurs, by independently adjusting the pressure of the pressing member corresponding to each portion, the core paper and the liner can be uniformly clamped over the entire length in the width direction. In addition, if the pressure of the pressing member in the area where the core paper and the liner are not running is released, there is an advantage that unnecessary pressure is not applied to the lower roll and the endless belt, and the abrasion can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a single-sided corrugated board manufacturing apparatus according to the present invention.

FIG. 2 is an explanatory perspective view showing a relationship between a pressing member and a lower roll of the auxiliary pressure bonding mechanism according to the embodiment.

FIG. 3 is a schematic cross-sectional view of an essential part showing another embodiment of the sub pressure bonding mechanism.

FIG. 4 is a schematic cross-sectional view of an essential part showing still another embodiment of the sub pressure bonding mechanism.

FIG. 5 is a schematic sectional view showing another embodiment of the single-faced corrugated board manufacturing apparatus according to the present invention.

[Explanation of symbols]

 12 Upper Roll 14 Lower Roll 16 Core Paper 22 Gluing Mechanism 26 Liner 30 Main Crimping Mechanism 32 Preheating Roll 34 Drive Roll 36 Tension Roll 38 Endless Belt 40 Auxiliary Crimping Mechanism 44 Pressing Member 62 Air Cylinder 72 Air Cylinder 92 Pressurizing Chamber

Claims (2)

[Claims] 1. An upper roll having a corrugated step portion formed on an outer peripheral surface thereof.
(12) and a corrugated step portion that meshes with the corrugated step portion are formed on the outer peripheral surface, and the core paper is passed between the corrugated step portion and the upper roll (12).
The lower roll (14) for forming the required step on (16), and the gluing mechanism (22) for gluing the stepped top of the core paper (16) on which the step is formed. In a single-sided corrugated board manufacturing apparatus for manufacturing the single-sided corrugated board by laminating the core paper (16) and the liner (26) at the top part, the lower roll (14) with the feeding path of the liner (26) sandwiched therebetween. At least three rolls (32,34,3) arranged to face each other
6) is provided with an endless belt (38) wound freely around the core paper (16) and liner (26) fed along the outer peripheral surface of the lower roll (14) by the belt (38). The lower roll (14)
The main pressure-bonding means (30) to be pressed against, and an endless belt (38) running along the outer peripheral surface of the lower roll (14) are arranged at a position facing the lower roll (14), An endless belt (38) is provided with a sub pressure-bonding means (40) which is brought closer to the lower roll (14), and the sub pressure-bonding means (40) has a surface facing the lower roll (14). ) Is formed in an arcuate shape following the outer periphery of the endless belt (38), and its surface is freely separated, a plurality of pressing members (44) arranged along the axial direction of the lower roll (14), It is composed of a cylinder (62, 72) which is connected to each of the pressing members (44) and is independently biased and controlled, and each of the pressing members (44) is biased by pushing the cylinder (62, 72). By moving the roll closer to (14), the lower roll
The core paper (16) fed along the outer peripheral surface of (14) and the liner (26) attached to the core paper (16) are attached to an endless belt.
A single-sided corrugated board manufacturing apparatus, which is configured so as to be pressed against the lower roll (14) via the (38). 2. A pressure chamber (92) covers a region of the lower roll (14) to which the step-formed core paper (16) is fed along the outer peripheral surface, and the pressure chamber (92) covers the region. The single-sided corrugated board manufacturing apparatus according to claim 1, wherein the core paper (16) is pressed against the outer peripheral surface of the lower roll (14) by a pressure medium supplied into the inside of the (92).