JPH0430907B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a single facer roll vibration prevention device. Prior Art As shown in FIG. 2, a single facer used in a corrugator line for manufacturing corrugated board has an upper roll 10 and a lower roll 12 each having corrugated teeth arranged in a vertical relationship. A pressure roll 14 is provided adjacent to the roll 12,
The core base paper 16 and the line 18 are fed from opposite directions to these roll groups, and the single-sided corrugated board 20 is
is now being manufactured. That is, the core base paper 16 is passed between the upper roll 10 and the lower roll 12 and pressed to form corrugated (float) tiers, and the glued roll 2 is placed on the top of the tier of the core base paper 16.
The glue 26 in the group pan 24 is applied through the paperboard 2, and then the liner 18 is heat-pressed onto the core base paper 16 using the pressure roll 14 to form the single-sided corrugated board 2.
0. Problems to be Solved by the Invention However, with this type of single facer, large vibrations occur during the production operation of single-sided corrugated board, which may cause the core base paper or liner to break, or the bonding between the two to become defective. In addition, there are problems such as an increase in noise, which impedes the working environment in the factory. That is, the upper roll 10 and the lower roll 12 in the single facer have wave-shaped teeth formed in the longitudinal direction of the roll outer circumference as described above, and the lower roll 12 is rotated by an external drive source (not shown). The pressure roll 14 is elastically pressed by a fluid cylinder or a spring. When the corrugated tooth portion of the lower corrugated roll 12 contacts the pressure roll 14 via the core base paper 16 and the liner 18, the pressure roll 14 contacts a single corrugated top portion of the lower corrugated roll 12. In the case where the rolls 12 and 14 are in common contact with the tops of both adjacent steps,
Since the distance between the axes varies, the pressure roll 14 repeatedly moves toward and away from the lower roll 12 by the amount of variation, and this appears as the large vibration described above. For example, as shown in FIG.
As shown in FIG. 4, the distance AB between the axes of both rolls 12 and 14 when the rolls 12 and 14 are in contact with each other is as shown in FIG.
When the corrugated teeth 1 and the corrugated teeth 3 are in common contact with the pressure roll 14 at the top of each step, the distance AB' between the axes of both rolls 12 and 14 causes a contact difference of x in the latter. (Note that the core base paper and liner interposed between both rolls are omitted from illustration.) This means that a contact difference of x occurs in the distance between the axes of both rolls 12 and 14. , which means that during the manufacturing operation of single-sided corrugated cardboard, the pressure roll 14 repeatedly approaches and separates from the lower roll 12, and therefore large vibrations occur due to the high speed, resulting in the above-mentioned problem. This may lead to other problems such as breakage of the core base paper or liner, poor lamination, and increased noise. Therefore, effectively preventing the occurrence of vibration between the lower roll 12 and the pressure roll 14 of the single facer and eliminating the above-mentioned drawbacks is a long-standing concern and demand in the industry from the standpoint of improving yield and work efficiency. However, this problem has not yet been completely resolved. Purpose of the Invention In view of the above-mentioned circumstances, the present invention effectively prevents the occurrence of vibration between the lower roll and pressure roll of a single facer, and prevents breakage of the core base paper and liner and poor lamination caused by the vibration. This was proposed with the aim of preventing other adverse effects such as an increase in noise, minimizing the idle time due to suspension of corrugator line operation, and minimizing the negative impact on operating efficiency. Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an upper roll and a lower roll that perform corrugated forming by applying pressure and feeding to the core raw paper, and a corrugated top portion of the corrugated raw paper. In a single facer consisting of a sizing roll that applies a sizing agent to the sizing material, and a pressure roll that presses and adheres a liner to the corrugated top portion of the glued core base paper, both ends of the lower corrugated roll are spaced apart in the longitudinal direction. A ring is fitted in the lower roll, and the ring is configured to contact the outer peripheral part of the pressure roll with a required rolling force, and the diameter of the ring is set so that the top part of the corrugated teeth formed on the lower roll is independent of the diameter of the ring. It is characterized in that the dimensions are set to ensure the thickness of the core base paper and liner between the top of the corrugation and the pressure roll when facing the pressure roll. Embodiments Next, a single facer roll vibration prevention device according to the present invention will be described in detail below with reference to preferred embodiments and the accompanying drawings. FIG. 1 is a front view showing an embodiment of a single facer incorporating a roll vibration prevention device according to the present invention, and the same members as those already described in connection with FIG. 2 are designated by the same reference numerals. shall be instructed. That is, in the machine frame 28 in the illustrated single facer, the lower roll 12 is attached to its rotating shaft 2.
9 is rotatably supported by bearings 30, 30, and is configured to be actively rotated by being connected to a drive source (not shown). Further, the upper roll 10 is connected to a piston rod 38 of a hydraulic cylinder 36 via bearings 34 at both ends of its rotating shaft 32, so that the upper roll 10 contacts the lower roll 12 with a predetermined contact pressure. Similarly, the pressure roll 14
has bearings 4 at both ends of the rotating shaft 40, respectively.
2 to the piston rod 4 of the hydraulic cylinder 44.
6 and comes into contact with the lower roll 12. Rings 48, preferably made of a hard synthetic resin material that allows slight elastic deformation, are fitted onto both ends of the lower roll 12 at a predetermined distance apart in the longitudinal direction. As shown in FIG.
Considering the thickness of the single-sided corrugated board 20 consisting of the liner 18 and the liner 18, the diameter is set to be slightly larger than the diameter of the lower corrugating roll 12, and it contacts the outer periphery of the pressure roll 14 with the required rolling force. I'm starting to do that. That is, the diameter of the ring 48 is
With the ring 48 pressed against the outer periphery of the pressure roll 14, when the top of the corrugated teeth formed on the lower roll 12 faces the pressure roll 14 alone, the top of the flute and the pressure roll 14 Between the one-sided cardboard 2
The dimensions are set to ensure a thickness of 0. Note that the lower roll 12 is heated to a high temperature by steam supplied inside the roll in order to promote adhesion between the core base paper 16 and the liner 18, so that the lower roll 12 does not come into contact with the lower roll 12. The ring 48 is made of a material having sufficient heat resistance. Also, the ring 48
In order to attach the head 50 to the lower roll 12, for example, as shown in FIG. An arcuate member 56 made of material is provided around each of the divided halves 52, and two divided halves 52 are used as a set to rotate the rotation shaft 29 of the lower roll 12.
Although it is recommended to use a method of sandwiching and fixing with bolts 54, the present invention is not limited to this method. Further, the ring 48 may be made of a metal material that allows slight bending deformation, such as soft iron or copper. The head 50 is made of a hard synthetic resin material that can be slightly elastically deformed.
A ring 48 made of a metal material that allows slight bending deformation may be fitted onto the outer periphery of the 0. Effects of the Embodiment With this configuration, the ring 4
The lower roll 12 fitted with the pressure roll 1
4, the thickness of the single-sided corrugated board 20 consisting of the core base paper 16 and the liner 18 is ensured, and
Even if the corrugated board manufacturing operation progresses, both rolls 12,1
Due to the presence of the ring 48, the axial distance between the two is kept substantially constant. For example, as shown in FIG. 5, when the top of the corrugated teeth 1 of the lower roll 14 is in contact with the pressure roll 12 alone, the distance between the axes of both rolls 12 and 14 is AB . At this time, the ring 48 comes into contact with the pressure roll 14 and is slightly compressed and deformed. Next, as shown in FIG. 6, the rotation of the lower roll 12 progresses slightly, and the wave teeth 1 and 3 of the lower roll 12 commonly face the pressure roll 14 at the top of each stage (pressure roll (Position where the distance between the axis of No. 14 and the step top of wave teeth 1 and 3 is the same)
In this case, since the ring 48 is interposed between both rolls, the distance between the axes of both rolls 12 and 14 is
AB' is extremely close to the center-to-axis distance AB in FIG. In other words, according to this embodiment, the third
Said ring 4 as described in connection with FIGS.
Unlike the case where the ring 8 is not provided, the ring 48 is always pressed against the outer circumference of the pressure roll 14.
This means that the contact difference x hardly occurs in the center-to-axis distance AB' (note that the core base paper and liner interposed between both rolls are omitted from illustration).In other words, the lower roll 12 and Since the distance between the axes of the pressure roll 14 does not vary greatly, vibrations are effectively prevented from occurring during the corrugated board manufacturing operation. Effects of the Invention As described above, according to the single facer roll vibration prevention device according to the present invention, a ring facing outward from the top of the corrugated teeth formed on the lower roll is attached to the outer circumference of the pressure roll. Since the rollers are configured to be in pressure contact with each other, there is no large variation in the distance between the axes between the two rolls. Therefore, the generation of vibrations during the corrugated board manufacturing operation, which has been pointed out in the prior art, can be effectively prevented. Moreover, it is possible to solve all at once the problems caused by this type of mechanical vibration, such as breakage of the core base paper and liner, poor lamination between the two, and increased noise, which obstructs the working environment in the factory. It has the following effects:

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a single facer incorporating a roll vibration prevention device according to the present invention, FIG. 2 is a side view showing a schematic structure of the single facer, and FIGS. 3 and 4. is an explanatory diagram showing that in a single facer according to the prior art, there is a large change in the center-to-axis distance between the lower roll and the pressure roll, and FIGS. 5 and 6 are illustrations of roll vibration according to the present invention. Explanatory diagram showing that there is almost no change in the distance between the axes of the lower roll and the pressure roll in a single facer using a prevention device, No. 7
The figure is a longitudinal cross-sectional view showing an example of attaching the ring to the lower roll. 10...Upper roll, 12...Lower roll, 1
4... Pressure roll, 16... Cord base paper, 18...
Liner, 20...single-sided cardboard, 22...glued roll, 26...glue, 48...ring.

Claims (1)

[Scope of Claims] 1. An upper roll and a lower roll that press and feed the core base paper to form corrugations, and a sizing roll that applies a size agent to the top of the corrugated core paper that has been formed into corrugations. and a pressure roll that presses and adheres a liner to the corrugated top portion of the glued core base paper, in which rings are fitted to both longitudinally spaced ends of the lower roll; The ring is configured to contact the outer periphery of the pressure roll with a required rolling force, and the diameter of the ring is set such that when the stepped portion of the corrugated teeth formed on the lower roll faces the pressure roll alone, A roll vibration prevention device for a single facer, characterized in that the dimensions are set to ensure the thickness of the core base paper and the liner between the top of the step and the pressure roll. 2. The single facer roll vibration prevention device according to claim 1, wherein the ring is made of a heat-resistant material. 3. The single facer roll vibration prevention device according to claim 1, wherein the ring is made of a synthetic resin material that is hard and allows slight elastic deformation. 4. The single facer roll vibration prevention device according to claim 1, wherein the ring is made of a metal material that allows slight bending deformation. 5. The ring is constructed by fitting a metal material that allows slight bending deformation onto the outer periphery of a head made of a hard synthetic resin material that can be slightly elastically deformed. Single facer roll vibration prevention device.