JP2023108998A - single facer - Google Patents

Abstract

To provide a device that can control a meandering phenomenon by preventing the meandering when feeding core paper that is to be corrugated, the meandering being likely to be caused by difficulty in managing moisture percentage balance uniformly at right and left end edges of paper when a paper width is small, when stably operating a minimum-sized single facer that manufactures single-sided corrugated board from paper having a width of about 150-500 mm.SOLUTION: A single facer, in which core paper is fed while being corrugated, the paper being sandwiched between a first roll 5 and a second roll 6, includes an edge sensor that detects a position of an end edge of the paper, and an inter-shaft core distance adjusting mechanism 20 that finely adjusts an inter-shaft core distance between the first roll 5 and the second roll 6 related to a detection signal of the sensor on both end sides of the rolls 5, 6 or on one end side thereof, and when the paper meanders toward the adjusting mechanism 20, the adjusting mechanism widens the inter-shaft distance, and when the meandering disappears, the adjusting mechanism brings the inter-shaft distance back.SELECTED DRAWING: Figure 4

Description

The present invention relates to an apparatus for making single-faced corrugated board using two types of paper: corrugating medium and liner paper. The present invention relates to a single facer adapted to a new miniaturization plan, which is provided for continuous production of small sheets with a width of about 100 to 900 mm.

The switch from plastic to paper for packaging materials and cushioning materials is progressing rapidly, and the demand for paper corrugated cardboard is increasing day by day. Moreover, more and more users are demanding speedy handling of small orders, and there has been a demand for the development of inexpensive and compact equipment that can be manufactured from paper materials at the site where they are consumed, rather than mass production in large factories. From the user's point of view, compared to bulky cardboard, the logistics cost of base paper as a material is lower, and the space for inventory is significantly more efficient.

JP-A-2002-255421

Most conventional single facers are extremely large. In terms of product width, 2400mm to 1800mm is the mainstream, and we operate a mass production system in our large dedicated factory to meet the world's demands. The advantage of this method is that the quality control of the base paper, which is the raw material, is thorough. Rolled paper, which is the base paper for the material, is wrapped in moisture-proof packaging, and temperature and humidity are controlled in a dedicated warehouse.
However, such meticulous quality control cannot be expected for the roll paper supplied to the single facer of the present application. Since it is a small rod and the paper width is as small as about 150 to 500 mm, it is necessary to accept variations in paper quality due to moisture migration from both ends of the roll.

As a result, it was found that there is a marked tendency for the sheet to meander in the paper width direction when the sheet is conveyed while corrugated in a corrugated shape by a pair of corrugating rolls. Of course, it is necessary to control meandering even with a wide and large machine, but it seems that the tendency to meandering can be eliminated by controlling the tension on the left and right because the homogenization of the paper is maintained.

The present invention includes a first corrugating roll and a second corrugating roll which are provided with pressing means on both end sides of the rolls, sandwich and corrugate corrugating medium and convey the corrugating medium, and the corrugated corrugating medium on the outer peripheral surface of the first roll. A single facer comprising: an adhesive coating device for applying adhesive to the liner paper; a center-to-center adjustment for finely adjusting a center-to-center distance between the first roll and the second roll in relation to a position detection signal from the sensor; To provide a single facer characterized by comprising a mechanism.

More specifically, there is provided a single facer having the above-mentioned center-to-center distance adjusting mechanism on both ends of the roll, and a single facer having the above-mentioned center-to-center distance adjusting mechanism at only one end of the roll. Further, the present invention provides a single facer comprising an axis-to-center adjustment mechanism for changing the pressing force of pressing means on both ends of the roll in relation to the position detection signal from the edge sensor.

When meandering is detected by the edge sensor, the center-to-center adjustment mechanism on the side where the corrugating medium approaches due to meandering is operated to make fine adjustments so as to widen the center-to-center distance. However, since it is sufficient to relatively finely adjust the center-to-center distance, it is also possible to configure the center-to-center distance adjustment mechanism on the opposite side to perform fine adjustment operation so as to narrow the center-to-center distance. Yes, and if necessary, fine-tune both to achieve such a relationship. It goes without saying that if the meandering is properly corrected after the fine adjustment, the center distance adjustment mechanism is returned to its original state.

A corrugating roll unit having a core hole at the center position, an outer peripheral surface formed in a stepped shape, and having a suction communication hole, a heater hole, and a bolting hole, and a corrugating roll unit having the same outer peripheral surface shape as the corrugating roll unit. , and has a core hole, a suction communication hole, a heater hole, and a bolting hole at the same corresponding positions. The corrugated roll unit and the suction unit are alternately arranged, and the shaft is inserted through the core hole of the suction unit to fix the shaft, and the bolt is inserted through the bolting hole. To provide a single facer characterized by connecting and fixing by a first roll.

By constructing the present invention as described above, it is possible to quickly and effectively control meandering of the corrugating medium during operation. That is, in relation to the position detection signal of the edge sensor, if the paper flow is meandering in the width direction from a predetermined position, the paper flow can be controlled in the direction to correct the meandering. Therefore, the stability of operation can be ensured, and productivity can be improved. In particular, even if roll paper, which is the raw material for core paper, is left at room temperature without special protection, it has a large effect of being able to reliably handle meandering that frequently occurs. It can contribute to the practical use of a single facer.
Therefore, we were able to open up a new field of on-demand production of only the required amount on a daily basis at the site where it is consumed as a cushioning material or packaging material. In addition, by reducing the shipping costs associated with transporting bulky cardboard boxes and replacing the warehousing costs from arrival to consumption with roll paper, which is the raw material, it is possible to contribute to extremely rational and reliable cost reductions.

is an explanatory diagram for explaining the outline of the device of the present invention; as well as is an explanatory diagram for detailing a characteristic configuration; is an explanatory diagram for explaining a characteristic overall configuration of the apparatus of the present application; FIG. 4 is an explanatory diagram showing a main part in plan view; FIG. 4 is an explanatory view showing a main part in a perspective view; is an explanatory diagram for explaining the main configuration; FIG. 4 is a plan view of parts constituting the first corrugating roll; FIG. 4 is a plan view of parts constituting the first corrugating roll; FIG. 4 is a plan view of parts constituting the first corrugating roll; FIG. 4 is a plan view of parts constituting the first corrugating roll; FIG. 4 is a plan view of parts constituting the first corrugating roll; FIG. 4 is an explanatory view showing the first roll in a perspective view; FIG. is a cross-sectional view of the first roll; 1] is an external plan view of a first roll. [FIG.

FIG. 1 is an explanatory diagram for explaining the overall structure of the single facer of the embodiment, and FIGS. 2 and 3 are explanatory diagrams for explaining in detail the characteristic configuration of the present invention.
In the figure, 5 is a first roll, 6 is a second roll, and as is well known, the outer peripheral surfaces of these rolls are formed in a corrugated shape and rotate in the direction of the arrow with the uneven shapes meshing with each other. In the figure, reference numeral 1 denotes a corrugating medium, which is sandwiched between the first corrugating roll 5 and the second corrugating roll 6 and conveyed while being corrugated. An adhesive coating device 10 for coating is provided. The figure illustrates a coating apparatus in which the adhesive 13 in the adhesive container is drawn up by the peripheral surface of a rotating coating roll 12 and coated with a blade 11 to a predetermined thickness.

Further, at a downstream position in the transport direction, there is provided a bonding device 8 which is sandwiched together with the first corrugating roll 5 and presses and bonds the liner paper 2 to the corrugating medium 3 . In addition, although the exemplified one is of a type that is press-bonded by a belt stretched over a pulley 7, it can be replaced with a known bonding device 8 of any type other than a roll type. .
In the figure, reference numeral 22 designates a swinging frame, which can swing rightward and leftward by a required angle around a swinging fulcrum 21 as a fulcrum. In the illustrated state, the air cylinder 30 presses the second corrugating roll 6 toward the first corrugating roll 5 via the joint 31 . Further, the air cylinder 25 having the tapered plate 26 fixed to the rod is supported by a clevis pin 25a fixed to the main frame (not shown) on the end side, and fixed to the lower surface side of the tapered plate 26 on the rod side. It is supported by the cam floor 24 and is sandwiched from above and below by the cam floor 23 provided on the swing frame 22 .

2 partially shows the state where the air cylinder 25 is positioned at the return end, and FIG. 3 shows the state where it is positioned at the protruding end. As is clear from this figure, when the rod of the air cylinder 25 is pushed out, the thickness of the tapered plate 26 increases, so that the swing frame 22 is displaced clockwise about the swing fulcrum 21 as a fulcrum. That is, the center-to-center distance between the second corrugating roll 6 and the first corrugating roll 5 is slightly increased by fine adjustment displacement, and conversely, when the state shown in FIG. 2 is restored, the original center-to-center distance is restored.

Next, in the state shown in FIG. 2, the tapered plate 26 is set and adjusted so that the tapered plate 26 is strongly sandwiched between the fixed cam floor 24 and the cam floor 23, or adjusted so that the tapered plate 26 is sandwiched with a certain gap. Describe in detail what to set.
That is, in the former case, the first corrugating roll 5 and the second corrugating roll 6 do not tightly sandwich the corrugating medium 1, as is clear from the exemplified rocking mechanism, but some clearance is provided. In the latter case, it means that the film is tightly held by both rolls.

As described above, the characteristic feature of the present invention is provision of the center-to-center distance adjusting mechanism 20 for finely adjusting the center-to-center distance between the first corrugating roll 5 and the second corrugating roll 6 . A more detailed description will be given below with reference to FIGS. 4 and 5. FIG.
4 and 5 are explanatory diagrams of an embodiment single facer having such a center distance adjusting mechanism 20 provided on both end sides of a corrugating roll. That is, the main frame 15 is provided with a first corrugating roll via a bearing 5a, and a second corrugating roll 6 is configured to be rotated in conjunction with a pair of gears 33. A center-to-center adjustment mechanism 20 is provided on each side. In other words, while pushing the second corrugating roll 6 toward the first corrugating roll 5 with the pushing force of the air cylinder 30, if the air cylinder 25 is pushed out and activated as necessary, the center-to-center distance on the side that is activated instantly can be expanded by the set dimension.

Although the above-described bearing distance adjustment mechanism 20 functions to widen the center-to-center distance between the first corrugating roll 5 and the second corrugating roll 6 by a predetermined amount when necessary, it narrows the center-to-center distance by a predetermined amount. It is also possible to equip the bearing distance adjustment mechanism 20 which functions as follows. In this case, both rolls 5 and 6 are not in close contact with the corrugating medium 1 in the standard state, but the corrugating medium 1 is sandwiched while securing a clearance sufficient to narrow the distance between the cores. Needless to say, it is set to a transporting state.

That is, the bearing distance adjustment mechanism 20 referred to in the present application may be configured to be widened by a predetermined dimension when activated, or conversely be configured to be narrowed by a predetermined dimension, or, if necessary, be configured to have both functions. is also possible. In other words, it is possible to adopt a two-position or three-position system, and if necessary, adopt a system that allows continuous position movement instead of position transition.

Moreover, it is free to adopt the inter-bearing adjustment mechanism 20 other than the mechanical structure illustrated in the drawings. For example, the air cylinder 25, tapered plate 26, and other mechanical parts are abolished, and only the air cylinder 30 is involved in the swing frame 22. It is configured with various functions. That is, a means for changing the air pressure to be introduced is provided, and the air pressure is switched to a low air pressure when working to widen the center-to-center distance, and the air pressure is returned to the original air pressure when working to restore the original distance. Also, as described above, when the shaft-to-center distance is to be narrowed, the air pressure is switched to high, and when returning to the original state, the air pressure is returned to the original value.

In this way, it is also possible to configure the bearing distance adjusting mechanism by adding the air pressure switching means to the pressing means. Further, when adopting such a configuration, in addition to operating by switching between two types of high and low air pressures, it is also possible to provide a control means for continuously changing a predetermined pressure range for more favorable operation. There may also be a mechanism that acts on the rod of the air cylinder 30 to moderately limit either the widening or narrowing dimension or both dimensions. In any case, the specific dimensions that are finely adjusted by the center-to-axis adjustment mechanism according to the present application are about 5 to 20%, preferably 5 to 15%, of the corrugation height of the single-sided corrugated cardboard to be manufactured. Using the dimensions as a guideline, the fine adjustment is generally about 0.1 to 0.4 mm.

FIG. 6 is an explanatory diagram showing a perspective view of only the main part. In the figure, reference numeral 34 denotes an edge sensor, which acquires the positional information of the edge position on one side of the corrugating medium 1 in the width direction. For example, it suffices to adopt a suitable one from among various types such as a reflective photoelectric sensor and a laser sensor, but the meandering state caused by the edge of the running core paper 1 shifting in the width direction is monitored. . Specifically, if left and right directions are defined toward the downstream of the running core paper 1, the above-described right center distance adjustment mechanism 20 is activated in relation to the position detection signal when right side meandering is detected. That is, the distance between the right shaft centers indicated by SR is slightly increased. Then, the position of the edge starts to move to the left and returns. Then, since the position information of the edge sensor 34 is restored, the operation of the shaft center distance adjusting mechanism 20 is stopped and the right side shaft center distance SR is restored. It should be noted that, in order to stop the activation of the center distance adjustment mechanism 20, it is also possible to take into consideration the response delay of the movement of the edge and not to wait for the return information of the edge sensor 34, and to perform the time-up return after a predetermined time, for example, one second. In addition, various other control methods are adopted.

On the other hand, if left side meandering, which starts to move leftward, is detected, the above-described left center distance adjustment mechanism 20 is activated in relation to the position detection signal. That is, the left shaft center distance indicated by SL is slightly increased. Then, the position of the edge is guided to the right and starts to return. Then, when the position information of the edge sensor 34 returns to the original state, the activation of the center-to-center distance adjustment mechanism 20 is stopped, and the left-side center-to-center distance SL is restored. In consideration of the response delay of edge movement, it is possible to perform time-up recovery after a predetermined time without waiting for recovery information from the edge sensor 34, and any control method can be employed.

Specifically, as illustrated in FIG. 6, an ON/OFF type edge sensor 34 is installed only on the right side, and when the right edge of the core paper 1 enters the detection area of the sensor 34, the ON operation is performed. Therefore, immediately or after some time has elapsed, the right center distance adjustment mechanism 20 is activated. By doing so, the right center-to-center distance indicated by SR is slightly widened, and the right edge of corrugating medium 1 begins to be guided to the left. Then, when it leaves the detection area of the edge sensor 34 and turns off, the operation of the center distance adjusting mechanism 20 is stopped. Alternatively, the activation is stopped by returning from time up as described above. In any case, the meandering of the corrugating medium 1 to the right is thus controlled.

As for the left meandering of the core paper 1 meandering to the left, in this case, the left center distance adjusting mechanism 20 is activated in relation to the OFF signal of the edge sensor 34 . That is, the turn-off is regarded as the occurrence of left meandering, and immediately or after some time has passed, the center-to-center distance SL is slightly widened to guide the corrugating medium 1 to the right. This will control left side meandering.

The embodiment described above is an example of a system for controlling meandering by handling right meandering when ON and right meandering OFF and left meandering. , the edge sensor 34 may be configured by installing such sensors at the left and right edges respectively.

Another embodiment will now be described with reference to FIG.
FIG. 7(a) shows that the second corrugating roll 6 engaged with the first corrugating roll 5 is provided with axial center distance adjusting mechanisms 20 on both left and right sides like the embodiment illustrated in FIGS. The block diagram illustrates the configuration of the The center-to-center distance adjustment mechanism 20 is composed of a pressing means composed mainly of an air cylinder 30, and a fine adjustment means composed mainly of an air cylinder 25, a tapered plate 26, a swing frame 22, cam floors 23 and 24, and the like. However, as exemplified in (b), if necessary, it is also possible to use only the pressing means on one side and provide the center distance adjustment mechanism 20 only on the other side. . In this case, the center-to-center distance adjusting mechanism 20 has both functions of widening and narrowing the center-to-center distance by a predetermined dimension. Triggered as detailed.

If a simpler configuration is desired, the axial centers of the first corrugating roll 5 and the second corrugating roll 6 may be slightly offset from the parallel relationship, that is, the right axial distance SR and the left axial distance SL. , so that the corrugating medium 1 tends to meander in one direction in advance. For example, if SR>SL, a tendency to meander to the left, and if SR<SL, a tendency to meander to the right can be imparted. The center distance adjustment mechanism 20 having the function of either narrowing or narrowing is sufficient. Specifically, when the tendency to meander to the left is given in advance, the center distance adjusting mechanism 20 having the function of widening to the left or the center distance adjusting mechanism 20 having the function of narrowing to the right is provided. Similarly, when the tendency of meandering to the right is imparted in advance, a center distance adjusting mechanism 20 having a function of widening rightward or a center distance adjusting mechanism 20 having a function of contracting leftward is provided.

Now, the preferred first corrugating roll 5 incorporated in the single facer of the present application will be described with reference to FIGS. 8 to 15. FIG.
That is, a corrugating roll unit 40 having a predetermined width having a core hole 45 at the center position, an outer peripheral surface formed in a corrugated shape, a suction communicating hole 50, a heater hole 49, and a connecting bolt tightening hole 48, and the corrugating roll. It has the same outer peripheral shape as the unit 40, and has a core hole 45, a suction communication hole 50, a heater hole 49, and a connecting bolt fastening hole 48 at the same corresponding positions. The corrugated roll unit corrugated roll unit 40 and the sucking units 41 and 42 are shown in FIGS. 13 to 15. , they are arranged alternately, and the shafts 43 are inserted through the core holes 45 and axially fixed. It is characterized by

Therefore, as shown in FIG. 15, the corrugating roll unit 40 and the suction units 41 and 42 are integrally formed on the outer peripheral surface of the first corrugating roll 5 so that a large number of suction pockets 51 are open. A section (referred to as an adsorption section) from the point where the core paper 1 is corrugated together with the second corrugating roll 6 to the point where the bonding device 8 starts pressing and clamping together with the liner paper 2 is called a corrugating section. The core paper 1 can be held by suction on the outer peripheral surface of the first corrugating roll 5 .

Although FIG. 14 shows a cross-sectional view taken along the line AA shown in FIG. 9, the suction communication hole 50 communicates with the suction pockets 51 of the suction units 41 and 42, and is located at the left end thereof. The end plate 61 closes the hole, and the right end is provided with a suction plate 62 having a suction hole 66 communicating with the suction communication hole 50 to form a suction path. A sliding plate 63 that slides in close contact with a rotating suction plate 62 without rotating and a suction chamber 64 provided on a shaft 43 via a bearing 65 constitute a known suction mechanical valve. That is, by connecting a suction source to the suction hole 69, the pressure in the suction chamber 68 is reduced to a negative pressure, and the suction path is formed through the suction hole 67 of the sliding plate 63 fixed to the suction chamber 64. . Further, the suction holes 66 are formed as a large number of holes at approximately the same size and at the same positions as the suction communication holes 50 of the corrugating roll unit 40, but the suction holes 67 of the slide plate 63 are formed only in the above-described suction section. It is formed in an arcuate shape so that the suction chamber 68 and the suction hole 66 communicate with each other.

Details of the corrugating roll unit 40 and the suction units 41 and 42 are as follows. Specifically, the width dimension (the dimension in the direction normal to the paper surface of FIG. 9 or 11) is set to about 2 to 8 mm, and the outer peripheral surface is formed in the same shape as the corrugating roll unit 40 . A suction pocket 51 is formed by notching from the suction communication hole 50 toward the outer peripheral surface as shown in the drawing. That is, FIG. 10 shows the corrugated roll unit 40 and the sucking unit 41 aligned and superimposed, and FIG. 11 shows the corrugated corrugated roll unit 40 and the sucking unit 42 aligned and superimposed. However, as described above, a path for suction leading from the suction communication hole 50 to the outer peripheral surface via the suction pocket 51 is formed.

The difference between the suction unit 41 and the suction unit 42 is that the notch for forming the suction pocket 51 is slightly clockwise in the former and leftward in the latter from the suction communication hole 50 toward the outer peripheral surface. It lies in the fact that they are formed with a deviation in the direction of rotation. By doing so, as is apparent from the external view of FIG. 15, the suction pockets 51 can be arranged in a staggered manner by alternately combining the suction units 41 and the suction units 42 . By staggering the arrangement, there is an effect that a more uniform suction environment can be constructed. It is possible to configure the suction pocket 51 by simply forming a notch in the direction normal to the outer peripheral surface.

Regarding the corrugating roll unit 40, as illustrated in FIGS. 60 to 120 mm, and the corrugating roll unit 40 on the roll end side is preferably about 15 to 40 mm. By adopting a structure in which a plurality of narrow corrugating roll units 40 are connected to each other so as to have a desired width, the shafts 43 are inserted, and the connecting bolts 60 are used for integration, a common part can be used for a wide variety of products. Therefore, manufacturing costs and maintenance costs can be kept low.

Further, the corrugating roll unit 40 is formed with a core hole 45, a suction communication hole 50, a heater hole 49, a connecting bolt tightening hole 48, a sensor hole 47, a heat insulation hole 46, and a positioning hole 55.
The heater holes 49 are arranged at a position close to the outer peripheral surface of the roll next to the suction communication hole 50 and are equally divided (in the illustrated example, they are arranged in 8 equal parts). The surface is heated to uniformly maintain a predetermined temperature within the range of 100-180°C.

Also, the sensor holes 47 are not necessarily required, but are preferably formed at one or several locations to accommodate appropriate temperature sensing sensors such as thermocouples, which are used for temperature control by the heater. Electric wires for the heater and sensor are generally wired through the hollow hole 44 of the shaft 43, and are electrically connected by various slip rings (not shown).
Also, the heat insulating hole 46 is not an essential requirement, but it contributes to the heat transfer of the heater heat to the shaft 43 to prevent a useless temperature rise in the remaining portion. are formed at a position close to the shaft 43 in a state of being evenly spaced.

Furthermore, with respect to the positioning holes 55 formed in at least one or several pieces, these holes are also not essential requirements, but the positions and hole diameter tolerances are processed with high precision, and positioning rods (not shown) are inserted into the positioning holes 55. By inserting the corrugating roll unit 40 and the suction units 41 and 42 in a state in which a large number of the corrugating roll units 40 and the suction units 41 and 42 are combined, the shape of the outer peripheral surface is aligned orderly without deviation.

In general, steam is used as a heat source in the Single Facer. However, an object of the present invention is to provide a single facer capable of producing a compact small-rod product with a paper width of 150 to 500 mm, a main application of 250 to 350 mm, and a wide width of about 900 mm. Therefore, not only is the use of steam, which requires high facility costs, not suitable, but it is also desirable to reduce the diameters of the first corrugating roll 5 and the second corrugating roll 6 . Specifically, it is desirable to construct a first corrugating roll 5 having a diameter of 100 to 250 mm, preferably 120 to 200 mm, and a second corrugating roll 6 having a diameter equal to or about half that of the first corrugating roll 5 .

In addition, the single facer according to the present application has been described as having a configuration in which only the first corrugating roll 5 is heated. It is also possible to equip a preheater for preheating the liner paper 2 in advance.

Therefore, the single facer of the present invention can quickly and reliably control the meandering conveyance peculiar to narrow paper, which could not be eliminated simply by downsizing the conventional large-sized machine. Therefore, we were able to open up a new field of on-demand production of only the required amount on a daily basis at the site where it is consumed as a cushioning material or packaging material. In addition, by replacing the bulky cardboard shipping costs and warehouse storage costs from arrival to consumption with roll paper, which is a raw material, it is possible to contribute to cost reduction in an extremely rational and reliable manner.

DESCRIPTION OF SYMBOLS 1... Corrugating paper, 2... Liner paper, 3... Single-sided cardboard, 5... First corrugated roll, 5a... Bearing, 6... Second corrugated roll, 6a... Bearing 7 Pulley 8 Adhesive device 10 Adhesive coating device 11 Blade 12 Coating roll 13 Adhesive 15 Main frame, 20... Shaft center adjustment mechanism, 21... Swing fulcrum, 22... Swing frame, 23... Cam floor, 24... Fixed cam floor, 25... Air cylinder, 25a Clevis pin 26 Tapered plate 30 Air cylinder 31 Joint 33 Pair of gears 34 Edge sensor 40 Corrugated roll unit 41 Suction A unit 42 Suction B unit 43 Shaft 44 Hollow hole 45 Core hole 46 Thermal insulation hole 47 Sensor hole 48 Connection bolt hole 49 Heater hole 50 Communication hole 51 Suction pocket 60 Connection bolt 61 End plate 62 Suction plate 63 Sliding plate 64 Suction chamber 65 Bearing 66 Suction hole 67 Suction hole 68 Suction chamber 69 Suction hole ...is.

Claims (5)

A first corrugating roll and a second corrugating roll which are provided with pressing means on both end sides of the rolls, hold and corrugate the corrugating medium and convey the corrugating medium, and an adhesive on the corrugated corrugating medium on the outer peripheral surface of the first roll. and a bonding device for pressing and bonding the liner paper to the corrugating medium by sandwiching the liner paper with the first corrugating roll at the lower position in the conveying direction of the adhesive coating device, and
an edge sensor for detecting edges in the width direction of the corrugating medium, and an axis center distance adjusting mechanism for finely adjusting the center distance between the first roll and the second roll in relation to the position detection signal from the sensor. A single facer that is characterized by being configured with. 2. A single facer according to claim 1, wherein said center-to-center distance adjusting mechanism is provided on both end sides of said roll. 2. A single facer according to claim 1, wherein said center distance adjustment mechanism is provided only on one end of said roll. 2. A single facer according to claim 1, further comprising an axial center adjusting mechanism for changing the pressing force of pressing means on both ends of the roll in relation to the position detection signal from said edge sensor. A corrugating roll unit having a core hole at a central position, an outer peripheral surface formed in a stepped shape, and having a suction communication hole, a heater hole, and a connection bolt fastening hole, and a corrugating roll unit having the same outer peripheral shape as the corrugating roll unit. It has a core hole, a suction communication hole, a heater hole, and a connecting bolt fastening hole at the same corresponding positions, and further has a suction pocket which extends from the suction communication hole and opens at the outer peripheral surface, and has a width of 2 The corrugated roll unit and the suction unit are arranged alternately, the shaft is inserted through the core holes of the suction units to fix the shaft, and the connection is inserted through the bolting holes. 2. The single facer according to claim 1, wherein the single facer is connected and fixed by bolts to constitute the first roll.

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