JPH0464854B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] This invention provides a single-sided corrugated board manufacturing machine in which a core paper formed into a tiered shape by an upper roll and a lower roll is removed from the lower tier while the lower roll is being transferred. This invention relates to a core paper presser using wind pressure for a single-sided corrugated board manufacturing machine, which prevents the lower roll from coming off the forming teeth outwardly due to the centrifugal force of the roll, and ensures reliable transport and gluing.

[Conventional technology and its problems]

As shown in FIG. 1, the conventional core paper pressing device uses a large number of guide fingers 2 arranged along a part of the circumferential surface of the lower roll 1 to hold the core paper 3 after tier formation into the lower tier. The core paper 3 was pressed against the peripheral surface of the roll 1 to prevent it from separating from the molded teeth of the lower roll 1 due to the centrifugal force caused by the high speed rotation of the lower roll 1.

However, such a method is limited to the guidance finger 2.
In order to arrange the guide finger 2 on the circumferential surface of the lower roll 1, and furthermore to arrange the guide finger 2, the guide finger 2 is provided not only on the upper roll 4 but also on the circumferential surface of the applicator roll 6 of the gluing device 5. In order to form a large number of annular grooves 7 and 8 into which the corrugated paperboard sheets 1
The strength of the guide finger 2 has been reduced, and the adjustment work of the guide fingers 2 relative to the core paper 3 has become extremely troublesome.

In order to solve this problem, the applicant proposed the invention disclosed in Japanese Patent Application Laid-open No. 139948/1983.

The above invention, as shown in FIGS. 2 and 3,
A central suction plate 15 sandwiched between two outer suction plates 13 and 14 is loosely fitted into a large number of annular grooves 12 of the lower roll 11, and a vacuum device removes the central suction plate 15.
The core paper 1
Air is sucked into the annular groove 12 of the lower roll 11 on which the core paper 9 is wound, thereby attracting and holding the core paper 19 on the circumferential surface of the lower roll 11.

However, the width of the core paper 19 may vary depending on the order of the single-sided corrugated cardboard sheet 20 to be manufactured, and the annular groove 12 may not always be located near the end of the core paper 19. Depending on the core paper 19, the end of the core paper 19 is not located in the annular groove 12 as shown in FIG. It has happened that the end of the core paper 19 separates from the circumferential surface of the lower roll 11. In addition, the vacuum generating device had the disadvantage that it had to be large-sized and had a large capacity because it also sucked air from the annular groove 12 where the core paper 19 was not located.

Further, a core holding device shown in Japanese Patent Application Laid-open No. 55-34949 has also been proposed.

This core paper pressing device forms an airtight chamber on one side of the upper and lower corrugated rolls and the press roll so as to surround the gluing device, sends air into the airtight chamber, and air discharge grooves that are bored in the lower corrugated roll and communicate with the outside air. The core paper is pressed and held against the circumferential surface of the lower roll by utilizing the pressure difference between the lower roll and the pressure chamber.

However, in this core holding device, just like the method shown in Fig. 3, when the paper width of the core paper changes due to a change in the order of single-sided corrugated cardboard sheets to be manufactured, the edge of the core paper is inserted into the air release groove. If the edge of the core paper is not located in the air release groove, the edge of the core paper will not be adsorbed to the circumferential surface of the lower roll and the edge of the core paper will not be attracted to the circumferential surface of the lower roll and I once had a case where the edges of the core paper separated. Moreover, additional devices such as a cleaning finger for scraping off the glue that has entered the grooves are also required, resulting in an increase in the number of parts.

Therefore, this invention was made in view of the above circumstances, and by changing the order of the corrugated board sheets to be manufactured, even if the width of the core paper is different, the core paper can be reliably held on the circumferential surface of the lower corrugating roll. This not only eliminates the need for guiding fingers, but also effectively prevents the core paper from separating from the lower roll due to the wind pressure caused by the air flow from the ventilation roll.

The first invention uses a ventilation roll with open cells, so there is no need to provide grooves for exhausting the air in the pressurized chamber on each roll such as the lower roll, and the core paper Regardless of the paper width, there is no need for any member or mechanism to move and adjust it to match the paper width.
Another object of the present invention is to provide a core paper pressing device using wind pressure for a single-sided corrugated board manufacturing machine, in which the wind pressure can be changed depending on conditions such as the paper quality of the core paper.

In addition, the second invention uses a ventilation roll with several air release grooves, so there is no need to provide grooves for exhausting the air in the pressurizing chamber to the upper roll, lower roll, and press roll. Furthermore, regardless of the paper width of the core paper, there is no need for any member or mechanism to move and adjust it to match the paper width, and wind pressure can be adjusted depending on conditions such as the quality of the core paper. An object of the present invention is to provide a variable core paper pressing device using wind pressure for a single-sided corrugated board manufacturing machine.

[Means to solve the problem]

In order to achieve the above object, the present invention includes an upper roll and a lower roll for corrugation forming, a press roll for pasting liner paper, and a gluing means is provided on the back side of the lower roll. The lower roll and the press roll have a hollow structure for steam heating, and a pressurizing chamber surrounding the gluing means is formed on the back side of each roll.
In a single-sided corrugated board manufacturing machine that has an air supply port for supplying pressurized air in the pressurizing chamber, bearings for locking the roll shaft are arranged on both the upper and lower ventilation sides of the pressurizing chamber, and the upper front and the upper front of the pressurizing chamber A ventilation roll with open cells between the rear surface of the upper roll is rotatably supported on an upper bearing, and a ventilation roll with open cells between the lower part of the pressurizing chamber and the rear surface of the press roll is supported on the lower side. A spacer is inserted between the bearing for stopping the aeration roll and the mounting surface of the pressurizing chamber, and the pressure can be adjusted by increasing or decreasing the spacer.The surfaces of both aeration rolls are grooved. The present invention provides a core paper pressing device using wind pressure for a single-sided corrugated board manufacturing machine, which is characterized in that it is of a blank type.

In addition, an upper roll and a lower roll for corrugation forming and a press roll for pasting liner paper are installed in series, a gluing means is provided on the back side of the lower roll, and the upper roll, lower roll, and press roll are used for steam heating. In a single-sided corrugated board manufacturing machine, which has a hollow structure and has a pressurizing chamber surrounding each roll along with a gluing means on the back side of each roll, and an air supply port for supplying pressurized air is provided in the pressurizing chamber, the pressurizing chamber is Bearings for fixing the roll shaft are arranged on both the upper and lower ventilation sides, and the ventilation roll, which has several air release grooves between the upper front of the pressurizing chamber and the rear surface of the upper roll, is rotatably rotated to the upper bearing. At the same time, a ventilation roll with several air release hole grooves is rotatably supported on the lower bearing between the lower part of the pressurizing chamber and the rear surface of the press roll. The wind pressure of the single-sided corrugated board manufacturing machine is characterized by having a spacer between it and the mounting surface of the pressurizing chamber, so that the pressure can be adjusted by increasing or decreasing the spacer, and both ventilation rolls are made of flexible heat-resistant resin. The present invention provides a core paper pressing device according to the present invention.

[Effect]

In the first invention shown in FIGS. 4 to 6, when pressurized air is supplied into the pressurizing chamber 32 by starting a compressor or the like, it is pressurized to a constant pressure in the pressurizing chamber 32. , when further pressurized, the ventilation roll 3
The open air bubbles 3 and 34 are discharged to the outside of the pressurizing chamber 32.

In this way, a wind pressure flow of air is ensured in the pressurizing chamber 32 under the condition that a constant pressure is maintained, and this wind pressure flow causes the corrugated corrugated core paper 21 to be moved around the lower roll 24. Press it against the surface.

Further, in the second invention shown in FIG. 7, when pressurized air is supplied into the pressurizing chamber 32 by starting a compressor or the like, it is pressurized to a constant pressure in the pressurizing chamber 32, When further pressurized, the ventilation roll 3
It is discharged to the outside of the pressurizing chamber 32 from the ventilation grooves 40 and 40 of 8 and 39.

In this way, a wind pressure flow of air is ensured in the pressurizing chamber 32 under the condition that a constant pressure is maintained, and this wind pressure flow causes the corrugated corrugated core paper 21 to be moved around the lower roll 24. Press it against the surface.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one embodiment of a core paper pressing device using wind pressure for a single-sided corrugated board manufacturing machine according to the present invention will be described in detail with reference to the drawings.

FIG. 4 is a sectional view showing an example of a core paper pressing device using wind pressure of the single-sided corrugated board manufacturing machine according to the present invention.

In this FIG. 4, 21 is core paper and 22 is liner paper.

As shown in FIGS. 4 and 5, the core paper 21 is
Waveform corrugation is performed by passing through an upper roll 23 and a lower roll 24, each of which has a corrugated peripheral surface, while meshing with each other.

Then, when passing through the lower roll 24, the glue 29 is transferred to the top part of the flute by the gluing means 25, and in the next step, the lower roll 24 and the press roll 2
The liner paper 22 is sent between the core paper 2 and the core paper 2.
1 and a liner paper 22 are pasted on it and sent out as a single-sided corrugated cardboard sheet 27.

However, the gluing device 25 is disposed at a position close to the lower roll 24. and,
The glue 29 housed in the group pan 28 is
It adheres to the circumferential surface as the applicator roll 30 rotates and is transferred onto the top of the core paper 21 that is transferred from the applicator roll 30 to the lower roll 24.

The amount of glue 29 is adjusted by the difference in circumferential speed of doctor roll 31 with respect to applicator roll 30.

Steam is usually supplied inside the upper roll 23, the lower roll 24, and the press roll 26, and the heating of the core paper 21 facilitates the formation of the corrugations, and also prevents the waveform return phenomenon. It's like this.

In this invention, a pressurizing chamber 32 made of a housing is formed so as to surround the gluing device, and its upper and lower ends are brought close to the upper end roll 23 and the press roll 26, respectively.

A bearing part 35 with an arbitrary number of spacers 42 interposed between bolts 43 is attached to the left and right upper ends of the pressurizing chamber 32.
The ventilation roll 3 is fastened to this bearing part 35.
3 is attached to the upper roll 23 so as to be properly pressed and rotated, and also to the left and right of the lower end of the pressurizing chamber 32.
Bearing portion 3 with an arbitrary number of spacers 42 interposed therebetween.
6 are fastened with bolts 43, and the aeration roll 34 is attached to the bearing portion 36 so as to properly press against and rotate with the press roll 26. This ventilation roll 33,3
No. 4 has a flat surface without grooves as shown in FIG.

Therefore, by increasing or decreasing the number of spacers 42, the upper ventilation roll 33 can be adjusted to the upper end roll 23.
Adjust the degree of pressure against. Similarly, the degree of pressure of the lower ventilation roll 24 against the press roll 26 can be adjusted by increasing or decreasing the number of spacers 42.

Upper ventilation roll 33 and lower ventilation roll 34
Both are made of a heat-resistant foam roll made of a flexible material or the like and have open cells such as urethane, and the air in the pressurizing chamber 32 is discharged to the outside through the cells.

Both the ventilation rolls 33 and 34 are covered by the air pressure at their central portions, so that the ventilation rolls 33 and 3 are connected to the upper roll 23 and the press roll 26.
In order to prevent the pneumatic action from being different between both ends and the center of the roll, the ventilation rolls 33 and 34 are crown roll types in which the diameter of the center is slightly larger than that of the ends.

The air in the pressurizing chamber 32 is pressurized to a constant pressure through the air supply port 37 . The humidity and temperature of the air in the pressurizing chamber 32 are controlled so that the properties of the adhesive 29 in the group pan 28 do not change.

The paste 29 is usually starch-based, but is not limited thereto.

The open end of the side wall 32b of the housing 32a is in contact with the end surface of each roll 23, 24, 26 to prevent air leakage from this portion. It goes without saying that the rolls 23, 24, and 26, as well as the applicator roll 30 and the doctor roll 31, are each rotatably supported by the frame 41.

Therefore, when air is supplied from the air supply port 37 into the pressurizing chamber 32 of the housing 32a by starting a compressor or the like (not shown), the air is pressurized in the pressurizing chamber 32, and the air is continuously moved between the ventilation rolls 33 and 34. Air is released from the bubbles to the outside. Therefore, a wind pressure flow of air is ensured under the condition that a constant pressure is maintained in the pressurizing chamber 32, and this wind pressure flow causes the corrugated corrugated core paper 21 to be moved to the lower roll 24.
It acts as a press against the circumferential surface of the

In other words, the core paper 21 after step formation is transferred to the pressurizing chamber 32.
Inside, the front surface is pressed against the tooth profile of the lower roll 24 against the centrifugal force caused by the rotation of the lower roll 24 due to the wind pressure of the air, thereby ensuring reliable transportation.

Therefore, the core paper 21 is once separated from the lower roll 24, and when the core paper 21 comes into contact with the lower roll 24 again when transferring the glue 29 or pasting the liner paper 22, the core paper 21 is removed from the lower roll 24. This prevents the corrugation of the corrugated paper 21 from collapsing because the corrugation of the paper 21 does not match the tooth profile of the lower roll 24.

The pressing action exerted on the core paper 21 on the circumferential surface of the lower roll 24 by the wind pressure flow needs to be changed depending on conditions such as the paper quality of the core paper 21 and the rotation speed of the lower roll 24. This pressing action is determined by the amount of pressurized air pressed in and the amount of air released from the ventilation rolls 33, 34 to the outside.

On the other hand, the amount of air released to the outside is
36 is moved up and down to adjust the pressing force of each ventilation roll 33, 34 against the upper roll 23 and press roll 26, thereby increasing the amount of air vented from inside the pressurizing chamber 32 to the outside through each ventilation roll 33, 34. This can be done by adjusting.

FIG. 7 shows another embodiment of the aeration rolls 38 and 39, in which the aeration rolls 38 and 39 are provided with annular air release grooves 40, with or without open cells.
It has several articles. This ventilation roll 38,
39 is made of flexible heat-resistant resin or the like.

Then, the wind pressure of the pressurized air applied to the core paper 21 toward the circumferential surface of the lower roll 24 is adjusted by changing the pressing force against the upper roll 23 and the press roll 26 in the same manner as described above, to adjust the opening ratio of the ventilation grooves 40. This can be done by Moreover, the present invention provides the advantage of the liner paper 22 for transporting the press roll 26.
The liner paper 22 can also be pressed against the circumferential surface of the press roll 26 by the wind pressure flow, and there is no possibility of adhesive spots caused by careless wrapping of the liner paper 22 or the like.

FIG. 8 shows another embodiment of the lower roll 44, in which a plurality of shallow grooves 45 are provided on the circumferential surface of the lower roll 44 at appropriate intervals. In other words, when the core paper 21 is formed into corrugated corrugations by the engagement between the upper roll 23 and the lower roll 44, a considerable force acts on the core paper 21, causing the core paper 21 to
1 tries to expand and contract.

In particular, since the upper roll 23 and the lower roll 44 are engaged with each other, the force that causes the core paper 21 to expand and contract in the axial direction of the upper roll 23 and the lower roll 44 is not absorbed at all, and therefore the core paper Wrinkles may occur in a part of 21 in some cases.

The groove 45 is formed between the upper roll 23 and the lower roll 4.
4, or the upper roll 23
The meshing force between the core paper 21 and the lower roll 44 is weakened to absorb the force of the core paper 21 expanding and contracting in the axial direction of the upper roll 23 and the lower roll 44, thereby preventing wrinkles from forming in the core paper 21. .

On the other hand, the expansion/contraction force of the core paper 21 in the rotation direction of the upper roll 23 and the lower roll 44 is such that the engagement between the upper roll 23 and the lower roll 44 in the rotation direction is not over the entire circumferential surface but only on a part. However, it has never been reported that the core paper 21 is immediately absorbed and wrinkles are produced. Even if the groove 45 is provided on the upper roll 23, it can have a similar function.

In addition, in this invention, one or several air discharge ports are provided at appropriate locations between the side wall 32b of the housing 32a and the end face of each roll 23, 24, 26, and the core paper is inserted into the lower roll 24. You can also press 21,
Moreover, this air outlet and the ventilation rolls 33, 3
4, 38, and 39 can also be used in appropriate combination.

〔Effect of the invention〕

As described above, according to the core paper pressing device using wind pressure of the single-sided corrugated board manufacturing machine according to the present invention, in order to press the core paper so that it does not separate from the lower roll, wind pressure is generated toward the lower roll.
The air in the pressurized chamber is discharged to the outside by a ventilation roll that rotates in pressure contact with the upper roll and the press roll, respectively.

Due to the generation of this wind pressure, there is no need to perform any ventilation processing on the lower roll, upper roll, or press roll, and each roll is cooled for ventilation, reducing the heating efficiency of each roll by steam. In addition, the mechanical strength is not impaired due to the presence of the grooves for ventilation.

Moreover, as mentioned above, since the entire width of the core paper is pressed against the lower roll by wind pressure, even if the paper width of the corrugated board sheet to be manufactured is changed,
There is no need to change the width of the pressurizing chamber in response to the changed paper width, and accordingly the operator's operations can be simplified and control operations can be omitted due to the absence of a movable mechanism.

Furthermore, as with conventional rolls in which an annular exhaust groove is formed in the lower roll for ventilation, a large pressure difference locally occurs between the pressurized chamber that sandwiches the core paper and the annular exhaust groove that communicates with the outside air. This eliminates the possibility of the core paper digging into the annular exhaust groove and deforming it, resulting in the glue not being transferred.In addition, in the conventional type, the air in the pressurized chamber is removed from the annular exhaust groove, especially near the edges of the core paper. It never happens that the glue that has been concentrated and transferred within the body spreads to unnecessary areas.

In addition, by changing the degree of pressure bonding of the aeration roll to the upper roll or press roll depending on conditions such as paper quality, it is possible to improve the air flow from the aeration roll with open cells in the first invention and the aeration roll with several air grooves in the second invention. It is also possible to adjust the amount of ventilation to change the wind pressure toward the lower roll, thereby adjusting the force with which the core paper is pressed against the lower roll.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram showing an example of a core paper presser device in a conventional single-sided corrugated board manufacturing machine, FIG. 2 is a sectional view showing another example of a core paper presser device in a conventional single-sided corrugated board manufacturing machine, and FIG. The figures are a plan view of the essential parts showing the state of occurrence of the defect in Fig. 2, Fig. 4 is a sectional view showing an embodiment of the core paper pressing device using wind pressure of the single-sided corrugated board manufacturing machine according to the present invention, and Fig. 5. is a front view with a part of FIG. 4 in cross section, FIG. 6 is a side view of the main part showing the bearing part, FIG. 7 is a front view showing another embodiment of the ventilation roll, and FIG. 8 is a front view of the lower roll. FIG. 7 is a front view showing another embodiment. 21... core paper, 22... liner paper, 23...
... Upper roll, 24 ... Lower roll, 25 ... Gluing device, 26 ... Press roll, 27 ... Single-sided corrugated sheet, 28 ... Group pan, 29 ... Gluing agent, 30 ... Applicator roll, 31 ... Doctor roll, 32...pressure chamber, 32a...casing,
32b... Side chamber, 33, 34, 38, 39... Ventilation roll, 35, 36... Bearing portion, 37... Intake port, 40... Ventilation groove, 41... Frame, 42...
...Spacer, 43...Bolt.

Claims (1)

[Claims] 1. An upper roll and a lower roll for corrugation forming and a press roll for pasting the liner paper are arranged in series, and a gluing means is arranged on the back side of the lower roll, and the upper roll and the lower roll and the press roll are arranged in series. is a hollow structure for steam heating, a pressurizing chamber surrounding each roll with a gluing means is formed on the back side of each roll, and an air supply port for supplying pressurized air is provided in the pressurizing chamber. , Bearings for fixing the shaft of the ventilation roll are arranged on both the top and bottom sides of the pressure chamber, and the ventilation roll with open cells is rotatably shafted to the upper bearing between the upper front of the pressure chamber and the rear surface of the upper roll. At the same time, the ventilation roll with open cells between the lower part of the pressure chamber and the rear surface of the press roll is rotatably supported on the lower bearing, and the bearing for stopping the ventilation roll and the pressure chamber are installed. A core paper pressing device using wind pressure for a single-sided corrugated board manufacturing machine, characterized in that the pressure contact can be freely adjusted by increasing or decreasing the spacer by interposing a spacer between the surfaces, and the surfaces of both ventilation rolls are of a type without grooves. 2 An upper roll and a lower roll for corrugation forming and a press roll for pasting liner paper are arranged in series, a gluing means is arranged on the back side of the lower roll, and the upper roll, lower roll and press roll are hollow for steam heating. In a single-sided corrugated board manufacturing machine, a pressurized chamber is formed on the back side of each roll surrounding it together with a gluing means, and the pressurized chamber is provided with an air supply port for supplying pressurized air. Bearings for shafting the ventilation rolls are arranged on both sides, and the ventilation rolls with several air release grooves between the upper front of the pressurizing chamber and the rear surface of the upper roll are rotatably supported on the upper bearings. At the same time, a ventilation roll with several air release grooves is rotatably supported on a lower bearing between the lower part of the pressure chamber and the rear surface of the press roll. The center core of the single-sided corrugated board manufacturing machine is characterized by having a spacer between it and the mounting surface, and the pressure contact can be adjusted by increasing or decreasing the spacer, and both ventilation rolls are made of flexible heat-resistant resin. Paper holding device.