JPS591790Y2 - Single facer lower roll - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a single-faced lower corrugating roll for producing single-corrugated cardboard.

As shown in Figure 1, the single facer consists of an upper roll 1 and a lower roll 2, each of which has a stepped surface.
It consists of a pasting roll 4 and a pressure roll 6, which are arranged around the outer periphery of the roll.

The base paper 3 is corrugated by the meshing of the upper roll 1 and the lower roll 2, and as it is being fed along the lower roll 2, it is glued to the top of the corrugation by the gluing roll 4, and the liner 5 supplied from the other side is applied to the corrugated line. It is laminated by the roll 2 and the pressure roll 6 to form a single-sided corrugated board 7 and sent to the next process.

During this process, the core paper 3 does not follow the steps of the lower roll 2 due to its centrifugal force and its rigidity, from the engagement point A of the upper roll 1 and the lower roll 2 to the contact point B of the lower roll 2 and pressure roll 6. Trying to fly outside.

Conventionally, a guide member was provided on the outer circumferential surface of the lower roll 2 to prevent this flying out, but this had the disadvantage that the guide part could not be glued and the strength of the single corrugated board was weakened.

In order to solve this drawback, various types of paper sheets have been proposed in which the base paper 3 is held by suction from inside the lower roll 2.

Among them, the lower roll 2 shown in FIGS. 2 and 3 is considered to be the most effective.

This has a plurality of grooves 8 circumferentially surrounding the outer periphery of the lower roll 2, and the bottom surface of the groove 8 and the hollow part 9 provided inside the lower roll 2 are connected by a large number of auxiliary suction holes 10. By connecting and suctioning from one end of the hollow portion 9, the base paper 3 is attracted to and held by the lower roll 2' through the auxiliary suction hole 10 and the groove 8.

However, this lower roll usually requires hundreds of auxiliary suction holes per roll, the diameter of the auxiliary suction holes is small, and the roll hardness is extremely low (because the width of the groove is narrow due to the step-boring process). Because of the high cost and the large wall thickness t, this processing takes a lot of time and costs a lot of money.

In addition, the auxiliary suction holes with small hole diameters and long straight pipes frequently become clogged with dust such as shelf paper dust during operation, which causes problems in terms of maintenance, such as a decrease in the suction power and a decline in the quality of the corrugated sheet. There is.

The present invention has a plurality of grooves that are circumferentially surrounded at appropriate intervals on the outer circumferential surface, and a plurality of grooves that are perforated in the end face and extend in the axial direction, and a part of which is in direct communication with the bottom of each of the grooves. It is characterized by having a hole and a vacuum suction device connected to the other end of the same size, and its purpose is to eliminate the above-mentioned conventional drawbacks and to suction and hold the base paper, which is easy to process and easy to maintain. The aim is to provide a single-facer lower roll.

The present invention is constructed as described above, and the base paper on the outer periphery of the lower roll is attracted to the lower roll by the suction force of the vacuum suction device being transmitted through the holes and grooves.

As described above, according to the present invention, the lower roll can effectively hold the base paper by suction.

In addition, since one hole transmits the suction force to each groove in common, the number of holes may be reduced accordingly, and the hole is not limited to the size of the groove as long as it is partially in communication with the groove. This makes processing easier and reduces processing time.

Furthermore, this allows the opening to be made larger, making it less likely to be clogged by foreign matter such as dust, and providing good maintainability during use.

The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 4-6.

In the figure, the lower roll of this embodiment has multiple rows of grooves 12 circumferentially surrounding the outer periphery of a stepped roll cell 11.
are being dug.

Reference numeral 13 denotes a hole bored inside the roll cell 11 over its axial direction.

This hole 13 has a diameter at a position communicating with the bottom of the groove 12.

That is, if the diameter of the hole 13 is d, the distance from the center of the roll cell 11 to the center of the hole 13 is Dp, and the diameter of the circle formed by the bottom surface of the groove 12 is Di, then Dp +cL=D i.

At this time, the wrap amount α becomes αDp→−d−Di.

Bosses 14 and 15 are engaged with both ends of the roll cell 11, and a suction hole 16 is bored in the axis of the boss 15.

The suction hole 16 and the outer surface of the boss 15 are connected by an auxiliary hole 17, and a vacuum suction device 1 is connected to one end of the suction hole 16.
8 is installation.

Further, a seal plate 19 that covers the auxiliary hole 17 and the hole 13 is attached to the boss 15.

One end of the hole 13 is sealed with a plug 20.

In this embodiment, one end of the hole is sealed and the other end is provided with a vacuum suction device, but the hole is not limited to this, and for example, both ends may be connected to a vacuum suction device.

The present embodiment is configured as described above, and the suction force generated by the vacuum suction device 18 is applied to the suction hole 16, the auxiliary hole 17,
The energy is transmitted to the base paper along the outer peripheral surface of the roll cell 11 through the holes 13 and grooves 12, and the base paper is attracted.

As described above, according to this embodiment, since the base paper can be suctioned and held from inside by the lower roll by the suction force, the adhesive can be applied to the entire top of the base paper, so that the strength of the single corrugated board can be maintained.

In addition, since the holes that mediate the suction force are commonly used in each groove, the number of holes can be reduced accordingly, machining is simple, machining time is shortened, and the cost can be reduced.

Furthermore, the hole only needs to be partially in communication with the groove, and there is no restriction on the size of the groove, so the diameter can be increased, and the suction force will be reduced due to clogging due to dust such as glue and paper dust. Maintainability is good.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing a conventional single facer, Fig. 2 is a vertical sectional view of a conventional lower roll, Fig. 3 is a sectional view taken along line XX in Fig. 2, and Figs. 4 to 6 are 4 is a cross-sectional view thereof, FIG. 5 is a Y-Y cross-sectional view of FIG. 4, and FIG. 6 is a Z-Z cross-sectional view of FIG. 4. . 12... Groove, 13... Hole, 1B...
...Vacuum suction device.

Claims (1)

[Scope of utility model registration request] a plurality of grooves that are circumferentially surrounded at appropriate intervals on the outer circumferential surface; a plurality of holes of the same size that are perforated in the end face, each extending in the axial direction, and a portion of which is in direct communication with the bottom of each of the grooves; and a vacuum suction device connected to the end of the single facer lower roll.