JPH0852824A - Single faced corrugated board manufacturing device - Google Patents

Abstract

PURPOSE:To accurately adjust the clearances among respective rolls without requiring troublesome preparation work. CONSTITUTION:One end of a sensing rod 57 is disposed and fixed on a site to be affected most by heat from step rolls, upper and lower, and a press roll of a frame 16. A main body 59 of a potentiometer 58 is disposed and fixed on a site hard to be affected by heat from three rolls of the frame 16. The other end of the sensing rod 57 is connected with the end of a variable rod 60 disposed movably on the main body 50. Displacement amount of the sensing rod 57 sensed by the potentiometer 58 is input into a control device. A cylinder 40 for adjusting clearance adjustment devices 32, 34 and 36 and motors 48 and 53 are feed back controlled by the control device based on the displacement amount sensed by the potentiometer 58, and the clearance amounts among respective rolls to the lower step roll are adjusted to be the proper values.

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 bonded together.

[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.

[0003]

The upper and lower corrugating rolls are operated in a heated state by supplying steam of a required temperature to the inside of the core paper to form a corrugated portion. High-temperature steam is also supplied to the inside of the press roll, and the liner guided by the roll is preheated to a required temperature to accelerate the solidification of the paste applied to the top of the corrugated core paper to promote the core paper. And the liner are attached in a short time and reliably. In this case, since the supply of steam to each roll is stopped at the end of the factory, the temperature of each roll is significantly lower than that at the time of operation by the next start. Therefore, when starting work, supply steam again,
After confirming that the temperature of each roll has reached a predetermined temperature, the production of single-sided corrugated board is started.

Since each roll is supported between the drive side frame and the operation side frame via the shaft, the heat of each roll is transferred to the frame via the shaft and the frame is heated. When the frame is heated in this way, thermal expansion (distortion) occurs, and the axial distance between the upper and lower rolls, the lower roll and the gluing roll, and the lower roll and the press roll supported between the frames (the gap between the rolls). Amount) will change respectively. That is, when manufacturing single-faced corrugated board, the gap amount between the rolls is set and adjusted in advance to an appropriate value, but the gap amount changes due to the thermal expansion of the frame, and a defective product is generated in the single-faced cardboard. There was a problem. Therefore, it is necessary for the operator to observe the state of the manufactured single-sided corrugated board to judge whether it is good or bad, and to perform the complicated work of adjusting the gap between the rollers. Moreover, experience and skill are required to adjust the gap,
It is pointed out that the time required for adjustment, the accuracy, etc. differ depending on the operator, and the yield decreases.

A device disclosed in Japanese Utility Model Laid-Open No. 2-108021 exists as a means for coping with the above-mentioned problems. In the device according to the present invention, a temperature sensor is arranged on the frame on which each roll is arranged, and the drive means of the gap adjusting device is feedback-controlled based on the frame temperature detected by the sensor. As described above, by detecting the frame temperature and adjusting the gap amount between the rolls, it is possible to achieve the adjustment under constant conditions without causing a difference in the adjustment depending on the skill level of the operator.

However, in order to adjust the gap amount between the rolls from the frame temperature, the strain amount due to the thermal expansion of the frame for each temperature is measured in advance, and the proper gap amount is set for this strain amount. The adjustment amount data had to be prepared as table data obtained by experiments, etc., and the preparation work was complicated. In addition, since the strain amount is indirectly detected, even if the table data is provided, it is not possible to accurately detect the strain amount due to changes in various conditions, etc. I couldn't.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned drawbacks inherent in the conventional single-sided corrugated board manufacturing apparatus, and to adjust the gap between the rolls. An object of the present invention is to provide a single-sided corrugated board manufacturing apparatus that can be accurately performed without requiring complicated preparation work.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and preferably achieve an intended purpose, the present invention provides a structure in which a pair of frames, which are spaced apart and opposed to each other on a driving side and an operating side, face each other.
An upper roll having a corrugated step portion on the outer peripheral surface and a corrugated step portion that meshes with the corrugated step portion are formed on the outer peripheral surface, and a required corrugated sheet is formed on the core paper that is passed between the upper roll and the corrugated step portion. A lower roll to be performed, a gluing mechanism for gluing the stepped top of the corrugated core paper via a gluing roll, and gluing of the corrugated paper fed along the outer peripheral surface of the lower roll. In a single-sided corrugated board manufacturing apparatus provided with a crimping means for press-contacting a liner at the step top portion, and a gap adjusting means for adjusting a gap between the upper roll, the gluing roll and the crimping means with respect to the lower roll. , The upper and lower corrugated rolls and the pressure-bonding means are arranged and fixed at one end of the detection member at a portion of the frame that is easily affected by heat by being heated to a required temperature, and the other end of the detection member is
The displacement amount of the detection member associated with the strain of the frame detected by the strain detection unit is input to the control unit, which is connected to the strain detection unit disposed in a fixed portion that is not easily affected by heat. The gap adjusting means is configured to be feedback-controlled based on the displacement amount detected by the means.

[0009]

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. 1 to 3 schematically show a configuration of a single-sided corrugated board manufacturing apparatus according to an embodiment, in which a drive side intersecting with a supply direction of core paper 12 is provided on a base 10 installed on a factory floor. A pair of frames 1 spaced apart on the operating side
4, 16 are opposed to each other, and an upper roll 18 having a corrugated step portion on the outer peripheral surface and a lower roll 20 having a corrugated step portion on the outer peripheral surface are rotatably supported between the frames 14, 16. Has been done. The rotating shaft of the upper roll 18 is positioned obliquely above the rotating shaft of the lower roll 20, and the respective corrugated step portions are meshable via the core paper 12. Further, directly below the upper roll 18 and obliquely below the lower roll 20, a sizing roll 22 and a doctor roll 24 are provided.
A gluing mechanism 26 composed of is provided. Core paper 12
2 includes an upper roll 18 and a lower roll 20 from a raw paper supply source on the left side in FIG. 2 through a plurality of guide rolls (none of which are shown).
It is supplied to a meshing region with and passes through the region to form a required step. Core paper 12 with step formation
After the gluing roll 22 of the gluing mechanism 26 has glued the top of the stage, the feeding direction is reversed along the outer peripheral surface of the lower roll 20 and goes upward.

As shown in FIG. 2, a press roll 28 is rotatably disposed obliquely below the lower roll 20 between the frames 14 and 16, and a raw paper supply source on the right side of the drawing is provided.
The liner 30 supplied from (not shown) is supplied to the lower roll 20 via the press roll 28, and is fed upward while being bonded to the glued top of the core paper 12. Further, high temperature steam from a supply source (not shown) is supplied from the operating side into the upper and lower corrugated rolls 18 and 20 and the press roll 28, and the steam causes the rolls 18 and 2 to roll.
It is configured to heat the surface temperature of 0.28 to a temperature suitable for manufacturing single-faced corrugated board (for example, 180 ° C.).

The upper roll 18, the sizing roll 22 and the press roll 28 of the sizing mechanism 26 are the lower roll 20.
With respect to each of the lower roll 20 and
The amount of gap between and can be variably adjusted.

That is, as shown in FIG. 1, the upper roll 18 is rotatably installed between adjustment frames 38, 38 (only one of which is shown) rotatably arranged on the frames 14, 16. A piston rod 40a of an adjusting cylinder 40 arranged on the corresponding frame 16 (14) is connected to each adjusting frame 38. Then, by urging both adjusting cylinders 40, 40 forward and backward synchronously, the upper roll 18 moves radially closer to and away from the lower roll 20, and the gap amount between the two rolls 18, 20 is reduced. Adjusted. It should be noted that the adjustment amount in the axial direction of the upper roll 18 can be changed by changing the urging amounts of the both adjustment cylinders 18 and 20. The sizing roll 22 in the sizing mechanism 26 is rotatably disposed on a support frame 42 of the sizing mechanism 26 via an eccentric mechanism (not shown), and a sector disposed on a shaft 44 of the roll 22. The gear 46 meshes with a gear 50 rotated by an adjusting motor 48 arranged on the support frame 42. That is, by urging the adjusting motor 48 forward and backward to rotate the shaft 44 forward and backward, the sizing roll 22 is moved toward and away from the lower roll 20 in the radial direction by the action of the eccentric mechanism. The gap amount between the rolls 22 and 20 is adjusted. An adjusting motor 48 and a sector gear 46 for moving the sizing roll 22 close to and away from the lower roll 20 are arranged at both axial ends of the roll 22, and the adjustment amount in the axial direction can be varied. It is configured so that

Further, the press roll 28 is rotatably supported between the frames 14 and 16 through an eccentric mechanism (not shown), and a sector gear 52 disposed on a shaft 51 of the roll 28. , Meshes with a gear 54 rotated by an adjusting motor 53 arranged on the frame 16 (14).
Then, by urging the adjusting motor 53 forward and backward to rotate the shaft 51 forward and backward, the press roll 28 moves radially closer to and away from the lower roll 20 by the action of the eccentric mechanism, and both rolls are moved. It is configured so that the gap amount between the 20 and 28 is adjusted. In addition, the adjustment motor 53 and the sector gear 52 that move the press roll 28 closer to and away from the lower roll 20 also include the gap adjusting device 3 for the sizing roll 22.
As in No. 4, it is arranged on both sides of the roll 28 in the axial direction, and the adjustment amount in the axial direction can be varied.

As shown in FIG. 3, strain detecting devices 55 and 56 are provided outside the both frames 14 and 16, and the strain amount due to the thermal expansion of the corresponding frames 14 and 16 is detected by the detecting devices 55 and 56. Is configured to detect. Since the strain detecting devices 55 and 56 have the same configuration, only the configuration of the strain detecting device 56 disposed on the operating side frame 16 will be described, and the same strain detecting device 55 disposed on the driving side frame 14. The same reference numerals are given to the members.

The parts which are easily affected by the heat due to the supply of high temperature steam to the upper and lower corrugated rolls 18 and 20 and the press roll 28 in the frame 16 (the parts which are close to the positions where the rolls 18, 20 and 28 are arranged), As shown in FIG. 1, one end of a detection rod 57 having a required length dimension is arranged and fixed.
In addition, the three rolls 18, 20, 28 on the frame 16
A main body 59 of the linear potentiometer 58 as a strain detecting means is arranged and fixed to a portion (a portion separated from the arrangement position of the rolls 18, 20, 28) that is hardly affected by the heat from the. The other end of the detection rod 57 is connected to the tip of a variable rod 60 movably arranged on the main body 59 via a joint 61. That is, frame 1
The detection rod 57 disposed between the portion easily affected by heat and the portion less susceptible to heat in 6 has the other end connected to the variable rod 60 according to the strain amount in the portion easily affected by heat of the frame 16. It is displaced, and this displacement amount is detected by the potentiometer 58 via the variable rod 60. The potentiometer 58 is configured to extract the voltage differentially by moving the iron core arranged on the variable rod 60 in the coil built in the main body 59.

As shown in FIG. 4, the strain detecting devices 55 and 56 arranged on the driving side and the operating side respectively have a control device 62, respectively.
The displacement amount of the detection rod 57 detected by each potentiometer 58 is input to the control device 62. The control device 62 is connected to the adjusting cylinder 40 and the motors 48 and 53 of the clearance adjusting devices 32, 34 and 36, and based on the displacement amount detected by the potentiometer 58, the cylinder 40 and the motor 4 are connected.
8, 53 is feedback-controlled, and the lower roll 20
It is set so as to adjust the gap amount between the rolls 18, 22, and 28 to the appropriate value. The high-temperature steam supplied to the upper and lower corrugated rolls 18 and 20 and the press roll 28 is configured to be supplied from the operating side and discharged from the operating side, so that the frame 16 on the operating side and the drive side are discharged. The amount of strain due to heat is different from that of the frame 14. Therefore, in the control device 62 of the embodiment, the gap adjusting devices 32, 34 and 36 are separately adjusted and controlled on the operating side and the driving side so that the amount of the gap between the rolls becomes uniform in the axial direction.

[0017]

Next, the operation of the single-faced corrugated board manufacturing apparatus according to the above-described embodiment will be described. In the manufacturing apparatus according to the embodiment, when steam having a required temperature is supplied to the upper and lower corrugated rolls 18, 20 and the press roll 28 at the start of work, the rolls 18, 20, 28 are heated and rise to the required temperature. In this state, a test operation of the manufacturing apparatus is performed, and the upper roll 18, the gluing roll 22 and the press roll 2 with respect to the lower roll 20 are passed through the gap adjusting devices 32, 34 and 36.
Adjust the gap in 8. In addition, three rolls 18, 20,
The frames 14 and 16 are heated by the heat transmitted from 28, and the detection rod 57 is caused by the generation of strain due to thermal expansion.
Is displaced, the displacement of the detection rod 57 at the time of performing the above-mentioned gap adjustment, that is, the potentiometer 5
The detection value at 8 is set as a reference value.

When the production of the single-sided corrugated board is started in this state, as shown in FIG. 2, the gluing mechanism 2 is attached to the step top portion of the core paper 12 which is step-formed by passing between the upper and lower step rolls 18 and 20.
A required amount of sizing material is applied by the sizing roll 22 in No. 6. Further, the liner 30 guided by the press roll 28 and supplied to the engaging portion with the lower roll 20 has the core paper 1
The pressure is applied to the glued step top portion of No. 2 for reliable joining.

2 from the start of the production of the single-sided corrugated board
During ~ 3 hours, the amount of strain of the frames 14, 16 heated by the heat transmitted from the rolls 18, 20, 28 is not stable, and the amount of gap between the rolls set at the time of starting changes. In this case, in the embodiment, the frame 14,
The strain amount of 16 is directly detected by the potentiometers 58, 58, and each gap adjusting mechanism 32, 58 is detected based on the detected value.
The gap amount is always maintained at an appropriate value by controlling the operation of 34 and 36. That is, compared with the time of starting, the frames 14, 16
If the strain increases due to further heating, or the strain decreases due to the temperature decrease, the displacement amount of the detection rod 57 changes correspondingly. This rod 5
The displacement amount of 7 is detected by the potentiometer 58 as the variable rod 60 moves with respect to the main body 59. In the potentiometer 58, the displacement with respect to a preset reference value is detected as a voltage difference, and the detected value is input to the control device 62. Then, in the control device 62, based on the input detection value, the adjustment cylinder 40 of each gap adjustment mechanism 32, 34, 36 and the motor 48,
Feedback control of 53 is performed, and the gap amount is automatically adjusted according to the strain amount. As a result, the gap between the rolls can always be maintained at an appropriate value, and a good single-sided corrugated board can be manufactured.

(Regarding Other Embodiment) Distortion detecting device 5 of the embodiment
As the single-sided corrugated board manufacturing equipment that adopts 5,56,
Not limited to the configuration shown in FIG. 1, as a pressure-bonding means for pressure-contacting the core paper 12 and the liner 30 with the lower roll 20,
For example, as shown in FIG. 5, an endless belt 66 wound around a plurality of rolls 63, 64, 65 may be adopted. That is, in this single-sided corrugated board manufacturing apparatus, a plurality of frames (3 in the embodiment are provided between the frames 14 and 16 on the opposite side of the arrangement position of the upper roll 18 with the lower roll 20 sandwiched therebetween.
Rolls 63, 64, 65 are rotatably supported, and an endless belt 66 is wound around these rolls 63, 64, 65 so as to run freely. The endless belt 66 located between the two rolls 63 and 64 spaced apart in the tangential direction of the lower roll 20 is configured to be pressed against the lower roll 20 with the core paper 12 and the liner 30 interposed therebetween. The roll 64 arranged at a required position is rotationally driven synchronously by the drive sources of the upper and lower rolls 18, 20 so that the endless belt 66 runs at substantially the same speed as the lower roll 20. Further, the roll 65 disposed at a position separated from the lower roll 20 is configured to be movable in the radial direction of the lower roll 20, and by moving the roll 65 by a cylinder (not shown), the core paper formed by the endless belt 66 is used. 12
The pressure contact force (tension) between the liner 30 and the liner 30 can be varied. Therefore, if the roll 65 is moved and adjusted according to the strain amount of the frames 14 and 16 detected by the strain detection devices 55 and 56, the pressure contact force of the endless belt 66 can be always maintained at an appropriate value.

In the single-faced corrugated board manufacturing apparatus according to the another embodiment, an endless belt is provided on the opposite side of the lower roll 20 with the endless belt 66 abutting against the liner 30 fed along the outer peripheral surface of the lower roll 20. An auxiliary pressure bonding means 67 for compensating for insufficient bonding of the core paper 12 and the liner 30 due to 66 is provided. The sub pressure bonding means 67 is movable in the radial direction of the lower roll 20 and includes a pressing member 68 extending in the axial direction of the lower roll 20. The pressing member 68 is the cylinder 6
It is urged by 9 to be pressed against the lower roll 20 via the endless belt 66, the liner 30 and the core paper 12. That is, also in the sub pressure-bonding means 67, the core paper 12 and the liner 30 are bonded together by adjusting the pressure according to the strain amount of the frames 14 and 16 detected by the strain detecting devices 55 and 56. It can be done reliably.

In the embodiment, the case where a linear potentiometer is used as the strain detecting means has been described, but the present invention is not limited to this. For example, in FIG.
As shown in FIG. 7, a rack 70 slidably disposed on the frame 16 (14) is connected to a end portion of the detection rod 57 that is directed to a portion that is not easily affected by heat, through a joint 61, and meshes with the rack 70. The pinion 71 is rotatably arranged on the frame 16 (14). A detection needle 72 is arranged on a shaft 71a that rotates integrally with the pinion 71, and the rotation angle of the detection needle 72 is converted into an electric signal by an electric circuit 73. Also with this configuration, the displacement amount of the detection rod 57 can be detected as a voltage difference. Further, as the strain detecting means, if it is a transducer that converts a mechanical strain amount into an electric signal, in addition to the above-described configuration, various configurations such as detecting the displacement amount of the detection rod with a magnetic sensor or an optical sensor, and It is possible to appropriately adopt the mechanism.

Further, the strain detecting means need not be arranged in the same frame where one end of the detecting member is arranged and fixed, as long as it is a portion which is not easily affected by heat from the upper and lower rolls and the crimping means. You may arrange | position in the fixed site | part separate from this frame. In addition, if the manufacturing equipment is such that the axial dimension of each roll is short and the amount of strain due to the thermal effect between the drive-side frame and the operating-side frame does not change, the strain detection device should be placed on only one of the frames. It only needs to be installed.

[0024]

As described above, according to the single-faced corrugated board manufacturing apparatus of the present invention, the amount of strain caused by the thermal influence of the upper and lower corrugated rolls, the sizing roll, and the frame supporting the crimping mechanism is directly detected. Since the gap between each roll and the pressure bonding means with respect to the lower roll is adjusted, the preparatory work can be reduced as compared with the conventional configuration in which the strain amount is indirectly detected from the temperature. Moreover, since the amount of strain is directly detected, it is possible to appropriately adjust the gap for the amount of strain, and it is possible to always produce a good single-sided corrugated board.

[Brief description of drawings]

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

FIG. 2 is a schematic sectional view of a single-faced corrugated board manufacturing apparatus according to an embodiment.

FIG. 3 is a schematic side view of the single-faced corrugated board manufacturing apparatus according to the embodiment.

FIG. 4 is a control block diagram of the single-faced corrugated board manufacturing apparatus according to the embodiment.

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

FIG. 6 is a schematic view showing another embodiment of the distortion detecting means.

[Explanation of symbols]

 12 Core paper 14 Frame 16 Frame 18 Upper roll 20 Lower roll 22 Lower roll 22 Gluing roll 26 Gluing mechanism 28 Press roll 30 Liner 32 Gap adjusting device (upper roll) 34 Gap adjusting device (gluing roll) 36 Gap adjusting device (press) Roll) 57 Detection rod 58 Potentiometer 62 Control device 66 Endless belt

Claims (2)

[Claims] 1. An upper roll (18) having a corrugated step portion formed on an outer peripheral surface between a pair of frames (14, 16) which are spaced apart and opposed to each other on a driving side and an operating side, and meshes with the corrugated step portion. A lower roll having a corrugated step portion formed on the outer peripheral surface and forming a required step on the core paper (12) that is passed between the corrugated step portion and the upper roll (18).
(20) and the outer peripheral surface of the lower roll (20) and a sizing mechanism (26) for sizing on the step top of the step-formed core paper (12) via a sizing roll (22). A crimping means (28, 66) for press-contacting the liner (30) is arranged at the glued step top portion of the core paper (12) fed along with the lower roll (20). The upper roll (18), the sizing roll (2
2) and a single-sided corrugated board manufacturing apparatus provided with a gap adjusting means (32, 34, 36) for adjusting the gap between the pressure bonding means (28, 66), the upper and lower roll rolls (18, 20) and pressure bonding means (28, 66) is fixed to one end of the detection member (57) at the portion of the frame (14, 16) that is easily affected by heat caused by being heated to the required temperature, and the other end of the detection member (57) is also fixed. Is connected to a strain detecting means (58) arranged in a fixed portion that is not easily affected by heat, and the displacement of the detecting member (57) accompanying the strain of the frame (14, 16) detected by the strain detecting means (58). The amount is input to the control means (62), and the control means (62) feedback-controls the gap adjusting means (32, 34, 36) based on the displacement amount detected by the strain detection means (58). A single-sided corrugated board manufacturing apparatus having the above-mentioned configuration. 2. The strain detecting means is a potentiometer.
(58) The single-sided corrugated board manufacturing apparatus according to claim 1.