JPH07251469A - 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 in combination when single-faced corrugated cardboard is produced by laminating core paper and a liner. 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 arranged at the position close to the supply route of the liner 26 on the outer peripheral surface of the lower corrugated roll 14. Further, an auxiliary press bonding means 40 having the energizing means 48 coming into contact with and separating from the lower corrugated roll 14 and energizing the press member 40 directly or indirectly sliding with the liner 26 and bringing the core paper 16 and the liner 26 into contact with the lower corrugated roll 14 under pressure is provided.

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 for manufacturing a single-sided corrugated board by laminating the core paper and the liner at the portion of the glued corrugated top portion, the outer peripheral surface of the lower roll and the liner It is arranged at a position close to the feeding path so as to run or rotate with the feeding of the liner, and is attached to the core paper and the core paper fed along the outer peripheral surface of the lower roll. The liner to the lower roll A pressure-bonding means and a pressing member, which is located on the outer peripheral surface of the lower roll and close to the feed path of the liner, can be moved toward and away from the lower roll and slidably contact the liner indirectly or directly. , By moving the pressing member close to the lower roll by the urging means, the core paper fed along the outer peripheral surface of the lower roll and the liner attached to the core paper are directed toward the lower roll. It is characterized in that it is composed of an auxiliary pressure-bonding means for press-contacting.

In order to preferably achieve the above-mentioned intended purpose, another invention of the present application is to provide an upper roll having a corrugated step portion on the outer peripheral surface and a corrugated step portion meshing with the corrugated step portion on the outer peripheral surface. It is composed of a lower roll that forms a required step on the core paper that is formed and is passed between the upper roll and a gluing mechanism that performs gluing on the top of the step-formed core paper. In the single-sided corrugated board manufacturing apparatus for manufacturing the single-sided corrugated board by laminating the core paper and the liner at the portion of the glued corrugated top, the lower roll is partially covered, and the pressure medium supplied to the inside A pressure chamber that presses the core paper fed along the outer peripheral surface of the lower roll against the outer peripheral surface of the roll, and a plurality of pressure chambers that are arranged to face the lower roll across the feed path of the liner. An endless belt wound freely on a roll The main pressure-bonding means for pressing the core paper and the liner fed along the outer peripheral surface of the lower roll toward the lower roll, and the endless belt facing the lower roll, and the endless belt. And a core member that is fed along the outer peripheral surface of the lower roll by moving the pressing member close to the lower roll by a biasing means. It is characterized in that the liner attached to the core paper is composed of an auxiliary pressure-bonding means which is pressed against the lower roll via an endless belt.

[0011]

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 the First Embodiment) FIG. 1 schematically shows the construction of a single-sided corrugated board manufacturing apparatus according to the first embodiment. A frame body 10 has corrugated steps formed on its outer peripheral surface. The upper roll 12 and the lower roll 14, which also has a corrugated step portion on the outer peripheral surface, are rotatably supported.
The rotation axis of the upper roll 12 is located obliquely above the rotation axis of the lower roll 14, and each corrugated step portion has a core paper 16
It can be engaged via (described later). A gluing mechanism 22 including a gluing roll 18 and a doctor roll 20 is arranged immediately below the upper roll 12 and obliquely below the lower roll 14. The core paper 16 includes a plurality of guide rolls 24 from a base paper supply source (not shown) on the left side in FIG.
Is supplied to the meshing region between the upper roll 12 and the lower roll 14 and passes through this 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 lower roll 14 to move upward. The liner 26 is a raw paper source on the right side in FIG.
Two roll-shaped preheaters 28, 28 from (not shown)
And is fed to the lower roll 14 and is fed upward in a state of being joined to the glued top of the core paper 16. A plurality of peripheral 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 (not shown) formed in the peripheral groove 14a. The core paper 16 is suction-held on the outer peripheral surface of the lower roll 14 via the () to stably feed the core paper 16. Inside the guide roll 24, high temperature steam from a supply source (not shown) is circulated to heat the core paper 16.

Upper roll 1 sandwiching the lower roll 14
A main pressure-bonding mechanism 30 that bonds the core paper 16 and the liner 26 together with the lower roll 14 is provided on the side opposite to the side 2. That is, as shown in FIG. 1, the frame body 1
0 on the outer peripheral surface of the lower roll 14 and the liner 2
6, a preheating roll 32 is rotatably arranged at a lower position close to the feeding path of 6, and a driving roll 34 is arranged at an upper position.
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 endless belt 38 facing between the preheating roll 32 and the driving roll 34 approaches the outer peripheral surface of the lower roll 14, and the core paper 16 and the core paper 16 fed along the outer peripheral surface of the lower roll 14. The liner 26 to be laminated is attached to the lower roll 1
It is designed to be clamped between 4 and. The liner 26 that has passed through the preheater 28 is supplied to the bonding area with the core paper 16 along the outer peripheral surface of the preheating roll 32 through the endless belt 38. As the endless belt 38,
A seamless resin belt is preferably used.

The preheating roll 32 is connected to a high-temperature steam supply source (not shown), and is constructed so that the high-temperature steam is circulated in 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. Is designed to run. 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 roll 36
The lower roll 1 by a biasing means such as a cylinder (not shown)
4, the tension applied to the endless belt 38 is adjusted by moving the endless belt 38 closer to or away from the endless belt 38. That is, by adjusting the tension of the endless belt 38, the lower roll 1
The contact pressure of the endless belt 38 with respect to the core paper 16 and the liner 26 fed along the outer peripheral surface of the sheet No. 4 is adjusted.

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 lower roll 14, the core paper 16 and the liner 26 by the main pressure bonding mechanism 30 are provided. An auxiliary pressure bonding mechanism 40 is provided to make up for the lack of lamination. This sub pressure bonding mechanism 40 is shown in FIG.
Further, as shown in FIG. 2, a housing 42 extending in parallel with the lower roll 14 having a U-shaped cross section is provided with a pressing member 44 movably in the radial direction of the lower roll 14. The pressing member 44 has a width dimension substantially the same as the entire length of the lower roll 14 and a required length in the circumferential direction of the roll 14. The surface facing the lower roll 14 has an outer periphery of the roll 14. It is formed in an arc shape imitating. In addition, a partition member 46 is disposed inside the housing 42, and the partition member 46 is placed above and below the partition member 46.
Tubes 48 that are elastically deformable are disposed between the inner bottom surface of the housing 42 and the bottom surface of the pressing member 44 (at positions where the partition member 46 is sandwiched in the circumferential direction of the lower roll 14). Each tube 48 extends in parallel over the entire length of the pressing member 44 in the width direction, and a compressed air supply source 50 is connected to both ends in the longitudinal direction via a valve 52. That is, by supplying a required amount of compressed air from each supply source 50 to the corresponding tube 48, the tubes 48, 48 expand and the pressing member 44 is brought into pressure contact with the lower roll 14.

Since compressed air can be independently supplied to the upper and lower tubes 48, 48, the contact pressure of the pressing member 44 on the lower roll 14 in the circumferential direction can be changed by varying the amount of compressed air supplied. Can be changed. Further, as the material of the pressing member 44, since it is in sliding contact with the back surface of the endless belt 38, a material softer than the endless belt 38 and having a smaller friction coefficient is preferably used.

(Operation of First Embodiment) Next, the above-mentioned first embodiment
The operation of the single-sided corrugated board manufacturing apparatus according to the embodiment will be described.

In the production of single-sided corrugated board, the tension roll 36 is moved in a direction away from the lower roll 14 to apply a required tension to the endless belt 38, so that the preheating roll 32 and the driving roll 34 are separated from each other. By the facing endless belt 38, the core paper 16 and the liner 26 fed along the outer peripheral surface of the lower roll 14 can be pressed against the roll surface. In addition, by supplying compressed air from each of the supply sources 50 to the tube 48, the pressing member 44 is brought closer to the lower roll 14 and the endless belt 3
8 is brought into a state in which it can be uniformly pressed against the liner 26 over the entire length in the width direction.

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 12 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, the pressing member 44
As a result, 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, so that reliable bonding of the both 16, 26 over the entire length in the width direction 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, Heat can be applied to the glued portion of the core paper 16 to accelerate the gelation of the starch-based paste and ensure the adhesion to 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, the core paper 16 and the liner 26 are
Since it is possible to securely press and,
It is possible to securely bond 6, 26. Also, when manufacturing thin single-sided corrugated board,
Since the core paper 16 and the liner 26 can be reliably bonded to each other only by the main pressure bonding mechanism 30, at this time, if compressed air is discharged from the tubes 48, 48, the pressure by the pressing member 44 will be the core paper. 16 and liner 26 are no longer joined. 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. When a load is applied to the pressing member 44 during the production of the single-sided corrugated board, the tubes 48 and 48 can be elastically deformed to absorb the load and prevent an excessive load from being applied to the auxiliary pressure bonding mechanism 40. You can

(Regarding another embodiment of the sub pressure bonding mechanism) FIG.
The 1st other Example of a sub-compression bonding mechanism is shown, Comprising: This sub-compression bonding mechanism 40 is comprised from the three blocks 54, 54, 54 divided | segmented in the axial direction of the said lower roll 14, and each block 54 is shown. The structure is basically the same as that of the embodiment shown in FIG. That is, in the first alternative embodiment, since the pressure of the pressing member 44 in each block 54 of the auxiliary pressure bonding mechanism 40 can be adjusted individually, the core paper 16 and the liner 26 by the lower roll 14 and each pressing member 44 can be adjusted. Clamping force of
It can be varied at three positions in the width direction. For example,
When manufacturing a thin one-sided corrugated board, the auxiliary pressure bonding mechanism 40 is not required, but since the tension of the endless belt 38 becomes weaker in the center in the width direction as described above, only the central block 54 is used to assist the tension. Therefore, the endless belt 38
It is possible to make the tension uniform over the entire length in the width direction. Further, when the diameter of the central portion of the lower roll 14 is reduced due to wear due to the production of the single-sided corrugated board for a long time, the three blocks 54 in the auxiliary pressure bonding mechanism 40 are
By variably adjusting the pressure due to each of the core paper 16 and the liner 26, a uniform clamping force can be applied to the core paper 16 and the liner 26 over the entire length in the width direction, and the sticking failure of the core paper 16 and the liner 26 is prevented. You can It is recommended that the end of the pressing member 44 in each block 54 be positioned so as to correspond to the circumferential groove 14 a provided around the lower roll 14.

FIG. 4 shows a second alternative embodiment of the sub-compression bonding mechanism. The sub-compression bonding mechanism 40 is divided into finer blocks 54, and the pressure of the pressing member 44 in each block 54 is individually divided. It is configured to be adjusted (the housing 42 and the partition member 46 are omitted in the drawing, and the tube 48 is shown only partially). For example, by setting the length of the pressing member 44 of each block 54 to 100 to 150 mm (desirable length) and finely adjusting the pressure applied to the core paper 16 and the liner 26 in units of 100 to 150 mm, The width dimension of the paper 16 and the liner 26 can be changed and the wear range of the lower roll 14 can be dealt with in detail. That is, the core paper 16 and the liner 26 can be constantly and uniformly squeezed by the lower roll 14 and the endless belt 38 (pressing member 44) over the entire length in the width direction to achieve reliable bonding between the two. It is a thing. Further, if the pressure by the pressing member 44 of the block 54 corresponding to the area where the core paper 16 and the liner 26 are not running is released, the lower roll 14 and the endless belt 38 do not exert unnecessary urging force, Roll 14 and belt 3
Wear of No. 8 can be prevented.

FIG. 5 shows a third alternative embodiment of the sub pressure bonding mechanism, in which the mechanism 40 is arranged only at the central portion of the lower roll 14 in the axial direction. That is, the pressure of the endless belt 38 in the main pressure bonding mechanism 30 becomes insufficient at the central portion due to the decrease in the diameter due to the wear of the lower roll 14, and the core paper 16 and the liner 26 have the entire length in the width direction thereof. A uniform clamping force can be applied over the entire length. Further, the tension in the width direction of the endless belt 38 in the main pressure bonding mechanism 30 can be made uniform by using the sub pressure bonding mechanism 40.

FIG. 6 shows a fourth alternative embodiment of the sub-compression bonding mechanism, in which a rod 56 disposed on the bottom surface of the pressing member 44 slides on the partition member 46 and the bottom of the housing 42. A compression spring 60 is provided between the housing 42 and a restricting portion 58 provided at the end of the rod 56 protruding from the housing 42 while being freely inserted. The compression spring 60 always pushes the pressing member 44 to the lower roll 14
The pressing member 44 is configured to be urged in the direction away from the endless belt 38 by the elastic force of the compression spring 60 when the compressed air is discharged from the tubes 48, 48. As a result, when the pressing member 44 is not used, the member 44 can be prevented from coming into contact with the endless belt 38, and thus the endless belt 38 and the pressing member 4
4 wear can be reduced and the service life can be extended.
It should be noted that the rod 56 and the compression spring 60 are provided in the pressing member 55.
Are arranged in the width direction at predetermined intervals, and the entire pressing member is separated from the lower roll 14.

FIG. 7 shows a fifth alternative embodiment of the sub-compression bonding mechanism, in which an air cylinder 62 is disposed on the outer bottom surface of the housing 42, and a piston rod facing the housing of the air cylinder 62. 62a, housing 4
A holder 64, which is slidably disposed inside 2, is connected. Further, the pressing member 44 is disposed in the holder 64 so as to be close to and away from each other via a plurality of rods 66 slidably inserted in the holder 64, and the pressing member 44 and the holder 6 are also provided.
A compression spring 68 is provided on each rod 66 facing between the pressure member 44 and the rod 4, and is configured to constantly urge the pressing member 44 in a direction away from the holder 64. The air cylinder 62 is
The pressing member 44 is attached to the lower roll 14 via the holder 64.
The urging is controlled so as to move between an operating position in which the roll 14 is moved closer to the retracted position and a retracted position in which the roll 14 is moved away from the retracted position. 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. Endless belt 38, liner 2
6 and the core paper 16 are pressed against the lower roll 14. When a load is applied to the pressing member 44 during the production of single-sided corrugated board, the pressing member 44 retracts from the lower roll 14 against the elastic force of the compression spring 68, and the auxiliary pressure bonding mechanism 40.
It is possible to prevent an excessive load from being applied to the.

FIG. 8 shows a sixth alternative embodiment of the sub-compression bonding mechanism, in which the bottom side of an air cylinder 72 is pivotally supported by a bracket 70 arranged and fixed to the frame body 10. On the piston rod 72a of
A support plate 76 slidably arranged is connected to the frame body 10 via guide rails 74. On the support plate 76, the pressing member 44 is disposed so as to be able to approach and separate via a plurality of rods 80 slidably inserted into the support plate 76, and between the pressing member 44 and the support plate 76. A compression spring 82 is inserted so as to constantly urge the pressing member 44 in a direction away from the support plate 76. 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 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. Then, when a load is applied to the pressing member 44 during the production of the single-sided corrugated board, the pressing member 44 withdraws from the lower roll 14 against the elasticity of the compression spring 82 as in the case of the fourth alternative embodiment shown in FIG. It is possible to prevent an excessive load from being applied to the sub pressure bonding mechanism 40. Also this 6th
Also in the other embodiment, a plurality of rods 80, compression springs 82, and air cylinders 72 are arranged at predetermined intervals in the width direction of the pressing member 44.

Also in the fifth alternative embodiment shown in FIG. 7 and the sixth alternative embodiment shown in FIG. 8, the auxiliary pressure-bonding mechanism 40 is composed of a plurality of axially divided blocks of the lower roll 14, The mechanism 4 is provided only in the central portion of the lower roll 14 in the axial direction.
It is also possible to provide 0. The auxiliary pressure bonding mechanism 40
3 is composed of a plurality of blocks 54 as shown in FIGS. 3 and 4, the compression springs 68, 82 and the cylinders 62, 72 are arranged for each block. The fifth
In the sixth embodiment, the pressing members 44 may be pressed against the lower roll 14 by the urging force of the cylinders 62 and 72, and the compression springs 68 and 82 may be omitted.

FIG. 9 shows a seventh alternative embodiment of the sub-compression bonding mechanism, in which one arm 44a of the pressing member 44 formed in a V shape is attached to the bracket 95 arranged and fixed to the frame body 10. Is rotatably supported at its end. A surface of the other arm 44b of the pressing member 44 that faces the lower roll 14 is formed in an arc shape that follows the outer circumference of the roll. Further, the adjusting bolt 96 is screwed into the bracket 95, and the regulating portion 97 is provided at a required position of the bolt 96 extending from the bracket 95 to the lower roll side. The regulating spring 97 is provided between the regulating portion 97 and the arm 44b. 98 is elastically interposed. That is, the arm 44b of the pressing member 44 is pressed against the lower roll 14 via the endless belt 38, the liner 26 and the core paper 16 in the main pressure bonding mechanism 30 under the elastic force of the compression spring 98. ing. The pressure applied to the endless belt 38 is
It is adjusted by moving the adjusting bolt 96 with respect to the bracket 95. A tension spring 99 is stretched between the bracket 95 and the arm 44a of the pressing member 44, and when the compression spring 98 is loosened, the arm 44b is separated from the endless belt 38 by the elastic action of the tension spring 99. Is configured.

Also in the seventh embodiment shown in FIG. 9, the sub-pressing mechanism 40 is composed of a plurality of blocks divided in the axial direction of the lower roll 14, or only in the central portion of the lower roll 14 in the axial direction. It is also possible to arrange the mechanism 40.
When the auxiliary pressure bonding mechanism 40 is composed of a plurality of blocks, that is, when a plurality of pressing members 44 are arranged, each pressing member 4
A compression spring 98, an adjusting bolt 96, and a tension spring 99 are provided for each four. And each adjustment bolt 96
The pressure can be applied only to the necessary portions of the endless belt 38 by adjusting the above.

(Second Embodiment) FIG. 10 schematically shows the construction of a single-faced corrugated board manufacturing apparatus according to the second embodiment of the present invention, which is basically the same as the first embodiment described above. The general configuration 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.

(Regarding Third Embodiment) FIG. 11 schematically shows the structure of a single-faced corrugated board manufacturing apparatus according to the third embodiment of the present invention, and is different from the first embodiment described above. The arrangement relationship between the upper and lower corrugated rolls 12 and 14 is different. That is, the lower roll 14 is rotatably supported directly above the upper roll 12 that is rotatably supported by the frame body 10, and the respective corrugated steps can be meshed via the core paper 16. . A sizing mechanism 22 including a sizing roll 18 and a doctor roll 20 is disposed obliquely below the lower roll 14. The core paper 16 is supplied from a raw paper supply source (not shown) on the right side in FIG. 11 to a meshing region of the upper roll 12 and the lower roll 14 via a guide roll 24, and passes through the region to obtain a desired stage. The formation is done. 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 move upward. Further, the liner 26 is supplied from the raw paper supply source (not shown) on the left side in FIG. 11 to the lower roll 14 through the preheater 28, and is fed upward in a state of being joined to the top of the core paper 16 to which the glue is applied. Be paid.

Above the lower roll 14, a main pressure-bonding mechanism 30 having the same structure as that of the first embodiment is arranged. That is, the endless belt 38 is rotatably wound around the three rolls 32, 34, 36 rotatably arranged in the frame body 10, and the preheating roll 3 in the belt 38 is wound.
2 and the drive roll 34, the portion facing the lower roll 14
The core paper 16 and the liner 26 attached to the core paper 16 which are fed along the outer peripheral surface of the lower roll 14 are pressed between the lower roll 14 and the outer peripheral surface of the lower roll 14. There is. The liner 26 that has passed through the preheater 28 is supplied to the bonding area with the core paper 16 along the outer peripheral surface of the preheating roll 32 through the endless belt 38. Further, on the side opposite to the lower roll 14 with the endless belt 38 abutting against the liner 26 fed along the outer peripheral surface of the lower roll 14, the auxiliary pressure bonding mechanism 40 having the same configuration as that of the first embodiment described above is disposed. Is provided. Therefore, the core paper 16 with the sizing agent applied to the corrugated step top portion by the sizing mechanism 22
And the liner 26 supplied through the preheater 28,
The main pressure-bonding mechanism 30 and the auxiliary pressure-bonding mechanism 40 perform reliable bonding to manufacture a single-sided corrugated board.

Incidentally, as the auxiliary pressure bonding mechanism 40, another one of the other embodiments shown in FIGS. 3 to 9 can be appropriately adopted. Also in the single-sided corrugated board manufacturing apparatus having the configuration of FIG.
A pressure chamber 92 for accommodating the gluing mechanism 22 may be provided, and the core paper 16 may be pressed against the outer surface of the lower roll 14 by the pressure of the pressure chamber 92 and stably transferred.

(Regarding the Fourth Embodiment) FIG. 12 schematically shows the construction of a single-faced corrugated board manufacturing apparatus according to the fourth embodiment of the present invention, and is different from the first embodiment described above. The structure of the main crimping mechanism 30 is different. That is, the first elastic roll 84 is disposed at an upper position on the outer peripheral surface of the lower roll 14 and close to the feeding path of the liner 26, and the first elastic roll 84 is fed along the outer peripheral surface of the lower roll 14. The core paper 16 and the liner 26 attached to the core paper 16
Is elastically pressed against the lower roll 14. A second elastic roll 86 is arranged at a lower position on the outer peripheral surface of the lower roll 14 and close to the feeding path of the liner 26, and the second elastic roll 86 is also fed along the outer peripheral surface of the lower roll 14. Core paper 16 and liner 26
Is elastically pressed against the lower roll 14. That is, the first elastic roll 84 and the second elastic roll 86 are arranged on the outer peripheral surface of the lower roll 14 and close to the liner feeding path in a vertical relationship.

The elastic rolls 84 and 86 are wound around the outer circumferences of the metal cylinders 88 and 90 with a required thickness, and high heat steam is supplied into the metal cylinders 88 and 90 from a supply source (not shown). It has become so. Therefore,
The elastic rolls 84 and 86 are made of, for example, a silicon-based heat resistant synthetic rubber so as to withstand the temperature of the high-heat steam supplied to the inside of the metal cylinders 88 and 90. The elastic rolls 84 and 86 are positionally adjusted so as to be able to press 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 with appropriate contact pressure. It is possible. Further, the first elastic roll 84 and the second elastic roll 86 are provided with appropriate driving means (not shown).
It is needless to say that the power is transmitted by and the motor is rotated at a required speed in synchronization with the upper roll 12 and the lower roll 14.

In the vicinity of the liner feeding path between the first elastic roll 84 and the second elastic roll 86, the first elastic roll 84
The auxiliary pressure-bonding mechanism 40 having the same structure as that of the first embodiment is provided. The pressing member 44 of the auxiliary pressure mechanism 40 abuts on the liner 26 so as to be directly slidable, and is fed along the outer peripheral surface of the lower roll 14 to the core paper 16 and the liner 26.
Is pressed against the lower roll 14.

(Operation of Fourth Embodiment) In the fourth embodiment shown in FIG. 12, the core paper 16 and the liner 26, which are fed along the outer peripheral surface of the lower roll 14, are attached to the lower roll 14. Since the elastic rolls 84 and 86 disposed above and below are elastically pressed against the lower roll 14, the gluing and adhesion of the core paper 16 and the liner 26 can be reliably achieved. Moreover, since the first and second elastic rolls 84 and 86 are arranged, it is possible to significantly reduce 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. It is a thing.

Here, in the structure in which the elastic rolls 84 and 86 are wound around the outer circumferences of the metal cylinders 88 and 90, the temperature of the high-heat steam supplied into the metal cylinders 88 and 90 is
Since it cannot be directly transmitted to the gluing portion of the core paper 16, there is a possibility that a laminating failure may occur due to a lack of heat especially when manufacturing a thick single-sided corrugated board. But the fourth
In the embodiment described above, the core paper 16 and the liner 26 can be pressed against the roll surface by the pressing member 44 of the sub pressure bonding mechanism 40 between the rolls 84 and 86. In addition, it is possible to reliably join the glued portions.

(Regarding Modifications) In each of the above-mentioned embodiments,
Although the tube, the compression spring, and the air cylinder have been described as the urging means for the pressing member, the present application is not limited to this, and a hydraulic cylinder, a means for utilizing the repulsive force of a magnet, or the like may be appropriately adopted. it can. Also,
As shown in FIG. 3, the auxiliary pressure bonding mechanism is not only divided in the axial direction of the lower roll, but also in the circumferential direction of the lower roll,
It is also possible to independently control the bias of the pressing member for each block. The number of divisions of the sub pressure bonding mechanism can be set to an appropriate number according to the specifications of the single-faced corrugated board manufacturing apparatus. Also, the number of tubes does not have to be two, and
It can also be a book or three or more. Furthermore, as the fluid supplied to the tube, compressed air (gas) has been exemplified,
Alternatively, a liquid such as oil or water may be used.

In the main crimping mechanism according to the first embodiment, the endless belt is used as a driving roll and a tension roll.
It is also possible to wind the roll around a book so that the roll can run freely and to supply high-heat steam to the inside of each roll. Also, the fourth
The main crimping mechanism according to this embodiment and the sub crimping mechanism according to another embodiment shown in FIGS. 3 to 9 may be combined.
Further, the first elastic roll which constitutes the main pressure bonding mechanism of the fourth embodiment can be omitted.

[0042]

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 or elastic roll as the main pressure bonding mechanism,
It is possible to significantly reduce vibration and noise generated during the production of single-sided corrugated board, and also to reduce the press marks produced on the liner side of the single-sided corrugated board. 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 part of the lower roll is worn over a long period of 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 cross-sectional view showing a first embodiment of a single-faced corrugated board manufacturing apparatus according to the present invention.

FIG. 2 is an explanatory perspective view showing a schematic configuration of a sub pressure bonding mechanism according to the first embodiment.

FIG. 3 is a main part schematic perspective view showing a first another embodiment of the auxiliary pressure bonding mechanism.

FIG. 4 is a schematic perspective view of a main part of a second alternative embodiment of the sub pressure bonding mechanism.

FIG. 5 is a schematic perspective view of essential parts showing a third alternative embodiment of the sub-crimping mechanism.

FIG. 6 is a schematic cross-sectional view of a main part of a single-sided corrugated board manufacturing apparatus that employs a fourth alternative embodiment of the sub pressure bonding mechanism.

FIG. 7 is a schematic cross-sectional view of a main part of a single-faced corrugated board manufacturing apparatus that employs a fifth alternative embodiment of the auxiliary pressure bonding mechanism.

FIG. 8 is a schematic cross-sectional view of a main part of a single-sided corrugated board manufacturing apparatus that employs a sixth alternative embodiment of the auxiliary pressure bonding mechanism.

FIG. 9 is a schematic cross-sectional view of a main part of a single-sided corrugated board manufacturing apparatus that employs a seventh alternative embodiment of the auxiliary pressure bonding mechanism.

FIG. 10 is a schematic sectional view showing a second embodiment of the single-faced corrugated board manufacturing apparatus according to the present invention.

FIG. 11 is a schematic cross-sectional view showing a third embodiment of the single-faced corrugated board manufacturing apparatus according to the present invention.

FIG. 12 is a schematic cross-sectional view showing a fourth embodiment of the single-sided 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 Secondary Crimping Mechanism 44 Pressing Member 48 Tube 50 Supply Source 68 Compression Spring 82 Compression Spring 86 second elastic roll 92 pressurizing chamber 98 compression spring

Claims (7)

[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 outer peripheral surface of the lower roll (14) and the feeding of the liner (26). The core paper (16) is arranged at a position close to the feeding path so as to run or rotate with the feeding of the liner (26) and is fed along the outer peripheral surface of the lower roll (14). And a main crimping means (30) for pressing the liner (26) attached to the core paper (16) toward the lower roll (14), and the liner (26) on the outer peripheral surface of the lower roll (14). ) Is provided with a pressing member (44), which is capable of sliding contact with the liner (26) indirectly or directly by moving close to or away from the lower roll (14) at a position close to the feeding path. , Means for urging the pressing member (44)
(48, 50, 68, 82, 98) by moving closer to the lower roll (14), the core paper (16) and the inner paper fed along the outer peripheral surface of the lower roll (14) A single-sided corrugated board manufacturing apparatus comprising a liner (26) attached to a core paper (16) and an auxiliary pressure-bonding means (40) that presses against a lower roll (14). 2. The main crimping means (30) comprises a plurality of rolls (3).
2, 34, 36) is composed of a free-running endless belt (38) wound around the inner core paper (38) fed along the outer peripheral surface of the lower roll (14) by the endless belt (38). 16) and liner (26)
2. The single-faced corrugated board manufacturing apparatus according to claim 1, wherein the lower roll is pressed against the lower roll. 3. The main pressure-bonding means (30) is composed of at least one rotatable elastic roll (86).
The core paper (16) and the liner (26) fed along the outer peripheral surface of the lower roll (14) by (86) are elastically pressed against the lower roll (14). Item 1. The single-sided corrugated board manufacturing apparatus according to Item 1. 4. 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) is partially covered and supplied inside. A pressure chamber (92) for pressing the core paper (16) fed along the outer peripheral surface of the lower roll (14) by a pressure medium onto the outer peripheral surface of the roll (14), and the liner (26). ) Of the lower roll (14) by the endless belt (38) rotatably wound around a plurality of rolls (32, 34, 36) arranged so as to face the lower roll (14).
4) a main pressure bonding means (30) for pressing the core paper (16) and liner (26) fed along the outer peripheral surface toward the lower roll (14), and the endless belt (38) Face the lower roll (14) across the
A pressing member (44) slidable to and from the endless belt (38)
The pressing member (44) is provided with a biasing means (48, 50, 68, 82, 98)
The core paper fed along the outer peripheral surface of the lower roll (14) by being moved closer to the lower roll (14) by
(16) and the liner (26) attached to the core paper (16),
A single-sided corrugated board manufacturing apparatus comprising a sub pressure-bonding means (40) pressed against the lower roll (14) via an endless belt (38). 5. A plurality of pressing members (44) are arranged along the axial direction of the lower roll (14), and each pressing member (44) independently moves toward and away from the lower roll (14). The single-faced corrugated board manufacturing apparatus according to claim 1, which is configured to: 6. A surface of the pressing member (44) facing the lower roll (14) is formed in an arc shape following the outer periphery of the roll (14), and the pressing member (44) is elastically deformable. tube
The single-sided corrugated board manufacturing apparatus according to claim 1, 4 or 5, wherein the single-sided corrugated board is moved toward and away from the lower roll (14) by supplying the fluid to the (48) and discharging the fluid from the tube (48). 7. A surface of the pressing member (44) facing the lower roll (14) is formed in an arc shape following the outer circumference of the roll (14), and the pressing member (44) includes a spring (68, 82, 98) with the elastic force of the core paper (16) and liner (26)
The single-faced corrugated board manufacturing apparatus according to claim 1, 4 or 5, wherein the single-faced corrugated board manufacturing apparatus is configured so as to be pressed toward 4).