JPH0419023B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for connecting single-sided corrugated sheets of different corrugated types, and more particularly, a connecting device for connecting single-sided corrugated sheets manufactured by single facer, light and double facer (double facing machine). ) and bond them together in the double facer to produce a double-sided corrugated sheet. In the corrugator line, the corrugation type of the single-sided corrugated sheet supplied to the previous double facer is changed to produce a double-sided corrugated sheet of a different standard (or Connection of single-sided corrugated cardboard sheets that allows a single-sided corrugated cardboard sheet being supplied to a double facer to be continuously connected to a single-sided corrugated cardboard sheet of another corrugation type without stopping the operation of the corrugator line when manufacturing double-sided corrugated cardboard sheets) It is related to the device.

Prior Art A series of corrugator lines installed in a corrugated board sheet manufacturing factory consist of a single facer that produces single-sided corrugated sheets, and a liner bonded to the single-sided corrugated sheets obtained by this process to produce double-sided corrugated sheets (if necessary, double-sided corrugated sheets). It is equipped with a double facer to produce double-sided corrugated sheets (also double-sided corrugated sheets).
That is, in the case of a single facer, the core paper supplied thereto is pressed between a pair of corrugated rolls to give a desired corrugation, and a liner is bonded to the core paper to produce a single-sided corrugated board sheet. The types of flutes in the corrugated board sheet are A flute and B flute, depending on the number of flutes per unit length.
There are tiers, C tiers, E tiers, etc. Therefore, the type of double-sided corrugated cardboard sheet or double-sided corrugated cardboard sheet depends on which corrugation type the single-sided corrugated cardboard sheet is used as the base material.

In addition, with double facer, a double-sided corrugated sheet is manufactured by laminating the supplied single-sided corrugated sheet and liner together.
By supplying two single-sided corrugated sheets and one liner, a double-sided corrugated sheet is produced.

Problems to be Solved by the Invention As mentioned above, double-faced corrugated sheets (or double-sided corrugated sheets) are manufactured in the double facer, and the type of the sheet depends on the corrugated type of the single-sided corrugated sheet that is the base material. There are various types. Therefore, in corrugated board manufacturing factories, it is routinely necessary to change the type of double-sided corrugated sheet (double-sided corrugated sheet) manufactured by the double facer to another type according to unique production plans or requests from users. It is occurring in

In order to change the type of double-sided corrugated paperboard sheet (double-sided corrugated paperboard sheet) in this way, it is necessary to change the single-sided corrugated paperboard sheet of tier A, which is currently being supplied to the double facer, to a single-sided corrugated cardboard sheet of a different corrugation type (for example, tier B). It is necessary to change the switching.
In this case, it is necessary to connect the leading end of the B-corrugated single-sided corrugated cardboard sheet to the cut rear end of the A-corrugated single-sided corrugated cardboard sheet that is being supplied to the double facer.

However, conventionally, this sheet joining work (so-called sheet splicing) has relied entirely on manual labor as described below, and as far as the applicant is aware, no mechanization has been carried out in this area. In other words, conventionally, when changing a single-sided corrugated sheet being supplied to a double facer to a single-faced corrugated sheet of a different type due to a change in specifications, all operations of the corrugator line were temporarily stopped, and immediately upstream of the double facer,
An operator manually cuts the single-sided corrugated paperboard sheets (for example, tier A) that have been supplied so far using a cutter. Next, place the leading edge of the single-sided corrugated cardboard sheet of a different tier type (for example, B tier) to which you want to join the sheets, to the rear end of the previously cut single-sided corrugated cardboard sheet.
After connecting via double-sided adhesive tape, running supply to the double facer was started. Note that some users cut the single-sided corrugated sheet that was being supplied, consume the sheet as it is in the double facer, and then manually insert a new single-sided corrugated sheet of a different corrugation type into the inlet of the double facer. In some cases, the liner is inserted, starts running, and then is bonded to a waiting liner.

However, in either case, complicated manual work by workers is required, which is extremely dangerous, and the operation of the entire corrugator line must be stopped each time this work is performed, which significantly reduces the production efficiency of corrugated sheets. There were flaws. In addition, such stage changes due to specification changes are frequently made during the operating hours of the day, and in this case, the adverse effects on the safety of the work and the operating efficiency of the corrugator line are doubled.

Regarding the core paper and liner supplied to the single facer, a device (auto splicer) that automatically splices the paper each time an order is changed is disclosed in, for example, Japanese Patent Application Laid-Open No. 152004/1983. Automatic splicing equipment is used. However, this type of auto splicer cannot be used for automatically connecting single-sided corrugated sheets of different corrugation types between single facer and double facer in a corrugator line because the mechanism is completely different. It is.

Purpose of the Invention The present invention has been proposed in order to suitably solve the above-mentioned disadvantages inherent in connecting a single-sided corrugated sheet fed to a double facer to a single-sided corrugated sheet of a different corrugation type. It is possible to connect a running single-sided corrugated sheet to a single-sided corrugated sheet of a different type safely and safely without relying on human labor at all, and without stopping the operation of the corrugator line. The present invention aims to provide an apparatus that can improve the production efficiency of corrugated cardboard sheets.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention provides that, when manufacturing a double-sided corrugated sheet by bonding a single-sided corrugated sheet and a liner together using a double facer, A device that continuously connects single-sided corrugated cardboard sheets of different corrugation types to a single-sided corrugated cardboard sheet being supplied, wherein the single-sided corrugated cardboard sheets and the single-sided corrugated cardboard sheets of different corrugation types are connected in a vertical relationship on the upstream side of the double facer. A sheet connecting part is provided to allow the sheet to run and stop at will, and above this sheet connecting part there is a sheet feeding device that selectively runs and stops one single-sided corrugated sheet, and a sheet that cuts the sheet at an arbitrary point. A sheet feeding device for selectively running and stopping the other single-sided corrugated sheet, and a cutting device for cutting the sheet at an arbitrary point are arranged below the sheet connecting portion. arranged in series, and in the sheet connection section, in the running path of the lower single-sided corrugated sheet and downstream of the cutting device for the sheet, tape having adhesive parts on both sides is attached to the tip of the lower single-sided corrugated sheet or A tape attachment device capable of selectively adhering to the rear end is disposed, and the tape attachment device is located immediately downstream of the sheet connection portion and is in a sheet running path common to both the upper single-sided corrugated sheet and the lower single-sided corrugated sheet. The upper or lower single-sided corrugated cardboard sheet, which is running toward the double facer after being cut by the cutting device, and the lower or upper single-sided corrugated cardboard sheet, which has started running from the stopped standby state, are cut at the required timing while still in the running state. A pressing device is installed to clamp the bottom single-sided corrugated sheet, and
It is characterized in that it is configured to be adhered to the rear end or tip of the upper single-sided corrugated cardboard sheet via the double-sided adhesive tape adhered by the tape attachment device.

Embodiments Next, a preferred embodiment of the connection device for single-sided corrugated cardboard sheets according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a single-sided corrugated sheet connecting device according to this embodiment, in which the connecting device 23 connects a single facer (not shown) located upstream of a corrugator line and a single facer (not shown) located downstream of a corrugator line. 5 and a double facer 20 shown schematically in FIG. Immediately upstream of this connecting device 23, two bridges 1 are arranged in upper and lower stages for transporting one-sided corrugated cardboard sheets 25 manufactured by single facers while retaining them in a wave-like manner. In the embodiment, it is assumed that the A tier single-sided corrugated paperboard sheet 25 is supplied to the upper bridge 1, and the B tier single-sided corrugated cardboard sheet 25 is supplied to the lower bridge 1. For convenience of explanation, the single-sided corrugated cardboard sheet in the A tier is designated by the reference numeral 25A, and the single-sided corrugated cardboard sheet in the B tier is designated by the numeral 25B.

(About Support Stands) A pair of support stands 2 are provided on the downstream side of the bridges 1, 1, facing each other across the running single-sided corrugated sheet 25, and spaced apart by a length that allows the sheet 25 to pass through. , 2 (only one of which is shown in FIG. 1) is erected. A series of guide rolls 26, a braking device 3, a sheet feeding device 4, and a cutting device 5, which are related to the running of a single-sided corrugated sheet 25, are arranged in series on the support stands 2, 2 in this order. Furthermore, the mechanisms 26, 3, 4, and 5 according to the series of configurations are arranged in parallel on the support stand 2 in a relationship of two levels, upper and lower, with single-sided corrugated cardboard sheets 25A of tier A being supplied to the upper side and Single-sided corrugated cardboard sheets 25B of B tier are supplied. That is, these support stands 2, 2
, single-sided corrugated sheet 25A of different corrugation types,
25B are supported substantially horizontally in a vertical relationship. Note that since the upper and lower mechanisms have the same structure, the lower mechanism will be explained, and the upper mechanism will only be designated by the same reference numerals and its explanation will be omitted.

A guide roll 26 extending in the width direction of the single-sided corrugated cardboard sheet 25B is rotatably installed at an appropriate position of the support stands 2, 2, and the single-sided corrugated cardboard sheet 25B supplied from the lower bridge 1 is
The flute surface is brought into contact with the upper side of the guide roll 26 so as to pass through.

(Regarding the Sheet Braking Device) Further, a braking device 3 that brakes and stops the running of the sheet 25B is disposed downstream of the guide roll 26 and at a position facing above the single-sided corrugated cardboard sheet 25B. As this braking device 3, a vacuum type braking device that applies braking to the single-sided corrugated sheet 25B by vacuum suction is preferably used, but devices with other structures can also be adopted as appropriate. . The braking device 3 applies a predetermined braking force to the single-sided corrugated cardboard sheet 25B during running and supply to the double facer 20, and
It functions to adjust the tension of B.

(Regarding the sheet feeding device) On the downstream side of the braking device 3 in the support stands 2, 2, when connecting the single-sided corrugated sheets, which will be described later, the single-sided corrugated sheets 25A, 25B, which are on standby, are provided with necessary commands. A sheet feeding device 4 is disposed for moving the sheet toward the downstream side. As shown in FIG. 1, this sheet feeding device 4 consists of a pair of rolls 4a and 4b that face each other vertically with a single-sided corrugated sheet 25B in between, and both rolls 4a and 4b are connected to a drive source (not shown). , are configured to be rotated in mutually opposite directions. The traveling speed of the single-sided corrugated cardboard sheet 25A that starts traveling by the sheet feeding device 4 is as follows:
The speed is set to be synchronized with the running speed of the single-sided corrugated cardboard sheet 25B that is running and being supplied toward the double facer 20.

Upper roll 4 in the sheet feeding device 4
a is configured to be able to freely move toward and away from the lower roll 4b, and while the single-sided corrugated sheet 25B is being supplied to the double facer 20, the upper roll 4a is separated from the lower roll 4b and moves toward and away from the single-sided corrugated sheet 25B. (See Figure 4a). When the single-sided corrugated paperboard sheet 25A that is waiting to be connected is run, the upper roll 4a approaches the lower roll 4b to sandwich the single-sided corrugated paperboard sheet 25A, as shown in FIG. 4b, and the sheet 2
It is designed to be able to run 5A.

(About Sheet Cutting Device) As shown in FIGS. 1 and 2, a cutting device 5 for cutting the single-sided corrugated sheet 25B along the width direction is provided further downstream of the sheet feeding device 4. . That is, the support stand 2,
An anvil cylinder 58 is rotatably supported between the two, and this anvil cylinder 58 faces the lower side of the travel path of the single-sided corrugated sheet 25B. This anvil cylinder 58 and one-sided corrugated sheet 2
A knife cylinder 57 is rotatably supported above sandwiching 5B, and the knife cylinder 57 has a knife 57a that protrudes in the radial direction and extends in the axial direction (the width direction of the single-sided corrugated sheet 25B). Further, the outer peripheral surface of the anvil cylinder 58 is wrapped with a cushion material (not shown) made of polyurethane or the like. The distance between the axes of the knife cylinder 57 and anvil cylinder 58 is adjusted such that the cutting edge of the knife 57a slightly bites into the cushion material. In addition, knife 57
Of course, the length of a is set longer than the width of the single-sided corrugated cardboard sheet 25B.

A piston cylinder 5 is mounted on the support stand 2.
1 is vertically disposed, and a rack 52 is disposed on a piston rod 51a pointing upward of the cylinder 51. The rack 52 meshes with a pinion 56 disposed at the shaft end of the knife cylinder 57. Therefore, by biasing the piston cylinder 51 in the forward and reverse directions, the knife cylinder 57 is moved under the meshing action between the rack 52 and the pinion 56.
rotates, and the knife 57a of the cylinder 57 can bite into the surface of the anvil cylinder 58. As a result, the single-sided corrugated sheet 25B located between the cylinders 57 and 58 is cut in the width direction. In addition, when there is no need to cut the single-sided corrugated sheet 25B, the knife cylinder 5
As shown in FIG. 2, the knife 57a of No. 7 waits at a position separated from the anvil cylinder 58, and is configured to allow the single-sided corrugated sheet 25B to pass between the two cylinders 57, 58.

The rack 52 is configured to be linearly movable via a guide member (not shown), and
The movement stroke of the rack 52 is adjustable by a stopper bolt 53 and a lock nut 55 screwed into a block 54 fixed to the support stand 2.

(Regarding the guide member) As shown in FIG. 2, on the downstream side of the cutting device 5,
A guide member 8 for guiding the single-sided corrugated sheet 25B downward is provided, and the single-sided corrugated sheet 25B that has passed through the cutting device 5 is guided to a pressing device 7, which will be described later, via this guide member 8. .

(Regarding the tape attachment device) Further, on the downstream side of the lower cutting device 5, a double-sided tape 67 having adhesive portions on both sides is attached to the leading or trailing end of the single-sided corrugated sheet 25B passing below the sheet connecting portion 24. A tape adhesive device 6 for pasting is arranged. That is, a tape roll 64 in which a long band 68 is wound with a predetermined diameter is rotatably disposed above the guide member 8.
A tape 67 having adhesive portions formed on both sides is removably attached to the tape 8 at predetermined intervals. This double-sided tape 67 is set to a size that allows it to be attached over substantially the entire length in the width direction of the single-sided corrugated cardboard sheet 25B.

In addition, the band 6 pulled out from the tape roll 64
8 is adapted to be wound onto a winding roll 66 via a plurality of guide rolls 65. The band 68 is guided by the guide roll 65.
In the middle of the drawer, the guide member 8
It is positioned so that it extends substantially parallel to the top of the screen. Moreover, at this time, the double-sided tape 67 attached to the band 68 is set so as to face the side facing the guide member 8 (see FIG. 2).

At a position where the band member 68 faces above the guide member 8, a pair of arms 62, which sandwich the single-sided corrugated sheet 25B in the width direction above the band member 68,
62 (only one of which is shown) is rotatably supported. The arm 62 is formed into an inverted L shape as shown in FIG.
A first arm portion 62 extending horizontally in
A press roll 63 is rotatably installed at the tip of the belt 62a and faces above the band 68.
Further, a piston rod 61a of the piston cylinder 61 is connected to the tip of a second arm portion 62b of one arm 62 that extends upward.
Therefore, by biasing the piston cylinder 61 in the direction in which its piston rod 61a extends, the arms 62, 62 rotate, and the pressing roll 63 presses the strip 68 against the single-sided corrugated sheet 25B. (The state shown by the two-dot chain line in FIG. 2). At this time, the double-sided tape 67 attached to the band 68 is attached to the liner side of the single-sided corrugated sheet 25B.

(Regarding the sheet pressing device) The single-sided corrugated cardboard sheets 25B, 25A guided downward through the guide members 8, 8 are placed at a position facing the travel path, and then cut by the cutting device 5 and then directed toward the double facer 20. Single-sided corrugated sheet 25B or 25A running
A pressing device 7 is provided which presses the single-sided corrugated paperboard sheet 25A or 25B, which has started running from a stopped standby state, while in the running state.

That is, a fixed roll 74 extending in the width direction of the single-sided corrugated cardboard sheet 25B, which is guided by the guide member 8 and hangs downward, is placed close to the travel path of the single-sided corrugated cardboard sheet 25B, which is attached to a machine frame (not shown) in the corrugator line. It is rotatably supported. Further, a press roll 73 is disposed at a position facing the fixed roll 74 with the single-sided corrugated sheet 25B in between, so as to be movable toward and away from the fixed roll 74.

A pair of arms 72, 72 (only one shown) is rotatably disposed at a position close to the fixed roll 74 at a predetermined distance in the width direction of the single-sided corrugated sheet 25B. . As shown in FIG. 2, this arm 72 is formed into a shape, and the press roll 73 is rotatably mounted at the tip of first arm portions 72a, 72a extending in the horizontal direction in the paired arms 72, 72. It will be erected in

Further, a piston rod 71a of a piston cylinder 71 disposed on the machine frame is connected to the tip of a second arm portion 72b of one arm 72 that hangs downward. Therefore, the piston cylinder 71
is urged in the direction in which the piston rod 71a extends, the arms 72, 72 rotate, and the two single-sided corrugated sheets 25A, 25B to be connected are connected to the fixed roll 74 by the press roll 73. (See Figure 4d). At this time, both seats 25A and 25B
are connected via double-sided tape 67. Note that even when the rolls 73 and 74 are close to each other, the two single-sided corrugated cardboard sheets 25A and 25B, which are pinched by the rolls 73 and 74, are allowed to run.

(Regarding other incidental structures) Furthermore, above the pressing device 7, as shown in FIG.
A guide member 27 that guides the rollers between the rolls 73 and 74 of the pressing device 7 extends in the vertical direction. Further, another guide member 28 is provided below the pressing device 7 to guide the single-sided corrugated sheets 25B and 25A to a pillar heater section 9, which will be described later (see FIG. 1).

On the downstream side of the connecting device 23, as shown in FIG. 1, a preheater section 9 constituting an independent unit is provided, and the preheater section 9 includes three preheater drums 10a, 10b in a vertical relationship. ,1
0c is arranged. Then, the connection device 2 is connected to each preheater drum 10a, 10b, 10c.
Single-sided corrugated sheets 25A and 25B that have passed through 3
A liner L fed out from a mill roll stand (not shown) is wound around the sheets 25A, 25B and the liner L to preheat and control humidity. Note that the uppermost preheater drum 10a is used only when producing double-sided corrugated cardboard sheets.

Furthermore, a gluing device 11 constituting an independent unit is installed downstream of the preheater section 9, and this gluing device 11 includes a first gluing means 12 for the A stage,
B-stage gluing means 13 are arranged in a vertical relationship,
The structure is such that gluing is applied to the corrugated corrugated top portions of the core paper of the single-sided corrugated cardboard sheets 25A and 25B that have been preheated by the preheater section 9. Further, a second gluing means 14 for the A tier is disposed downstream of the gluing means 13 for the B tier, and the gluing means 13 for the B tier and the second gluing means 14 for the A tier are one-sided, which will be described later. It is configured so that it can be selected and used depending on the change in the type of corrugation of the corrugated board sheet. Note that the first gluing means 12 for tier A is used only when manufacturing double-sided corrugated cardboard sheets.

(Regarding the double facer) Further downstream of the gluing device 11, as shown in FIG.
A and the liner L are pressure-bonded and heat-dried on a heating plate 75 provided on the double facer 20, and the final double-sided corrugated board sheet 22 is formed.

(About another embodiment) FIG. 6 is an explanatory diagram showing a case where the arrangement position of the connection device according to the embodiment is changed, and the connection device 23 is a one-sided corrugated sheet 25A manufactured by a single facer. , 25B are disposed in the middle of the bridge 1, which is conveyed in a retained state. This connecting device 23 includes the cutting device 5 and the tape bonding device 6.
and a pressing device 7, which connects the single-sided corrugated sheet 25A supplied to the upper side of the sheet connecting portion 24 and the single-sided corrugated cardboard sheet 25B supplied to the lower side, and supplies the single-sided corrugated sheet 25A or 25B to the double facer 20. can be carried out without stopping. In this case, bridge 1
Since the single-sided corrugated paperboard sheet 25A or 25B conveyed thereon moves very slowly, it has the advantage that the connection work can be carried out with plenty of time.

Effects of the Embodiment (Regarding the First Connection Procedure) Next, the first sheet connection procedure shown in FIGS. 3a to 3d will be described below in relation to the operation of the apparatus for suitably carrying out this procedure.

In the corrugator line, as shown in FIG. 3a, the sheet connecting portion 24 in the connecting device 23
Single-sided corrugated cardboard sheet 25 of tier A passing above the
It is assumed that A is supplied to the double facer 20 via the preheater section 9 and the gluing device 11, and a double-sided corrugated cardboard sheet 22 of A stage is manufactured. Further, at this time, a single-sided corrugated cardboard sheet 25B of tier B is waiting under the sheet connecting portion 24 with its leading end facing below the tape bonding device 6. For convenience of explanation, the single-sided corrugated cardboard sheet 25A of tier A supplied to the upper side of the sheet connecting part 24 will be referred to as the upper single-sided corrugated cardboard sheet 25A, and the single-sided corrugated cardboard sheet 25B of tier B supplied to the lower side of the sheet connecting part 24 will be referred to as the upper single-sided corrugated cardboard sheet 25A. is referred to as the lower single-sided corrugated cardboard sheet 25B.

In addition, in the tape bonding device 6, the double-sided tape 67 stuck to the band 68 faces above the lower single-sided corrugated sheet 25B, and the pressure roll 63
is spaced apart from the band 68. Furthermore, the pressing device 7
The pressure roll 73 is spaced apart from the fixed roll 74 to allow the upper single-sided corrugated sheet 25A to pass through.

In this state, in response to a command to change the type of single-sided corrugated cardboard sheet 22, from the upper single-sided corrugated cardboard sheet 25A currently being supplied to the lower single-sided corrugated cardboard sheet 2
5B, the piston cylinder 61 of the tape bonding device 6 is urged in a predetermined direction. As a result, as shown by the two-dot chain line in FIG.
The double-sided tape 67 affixed to is affixed to the tip of the lower single-sided corrugated cardboard sheet 25B. Then,
The piston cylinder 51 of the upper cutting device 5 in the sheet connecting portion 24 is urged in a predetermined direction to cut the upper single-sided corrugated cardboard sheet 25A that is being fed and running, as shown in FIG. 3b. Further, the lower single-sided corrugated cardboard sheet 25B that is on standby is caused to travel downstream by the lower sheet feeding device 4. In addition, at this time, the upper single-sided corrugated sheet 2 related to the traveling supply
The running speed of the sheet 5A is synchronized with the running speed of the lower single-sided corrugated cardboard sheet 25B which has started running.

The tip of the lower single-sided corrugated sheet 25B is
As shown in Figure 3c, the upper single-sided corrugated sheet 2
Pressing roll 73 in pressing device 7 via 5A
and the fixed roll 74. and,
At the timing when the rear end of the upper single-sided corrugated sheet 25A and the tip of the lower single-sided corrugated sheet 25B to which the double-sided tape 67 is attached are supplied to the pressing device 7, the piston cylinder 71 of the pressing device 7 moves in a predetermined direction. is energized by The arms 72, 72 are tilted by the bias of the piston cylinder 71, and the press roll 73 moves close to the fixed roll 74, as shown by the two-dot chain line in FIG. 2, and is supplied between the two rolls 73, 74. The upper single-sided corrugated cardboard sheet 25A and the lower single-sided corrugated cardboard sheet 25B are pressed together. As a result, both single-sided corrugated sheets 25A and 25B are connected via the double-sided tape 67.

Next, the piston cylinder 7 of the pressing device 7
1 is reversely biased to separate the pressure roll 73 from the fixed roll 74, as shown in FIG. 3d. Also,
The upper roll 4a of the lower sheet feeding device 4 in the sheet connecting portion 24 is replaced with the lower roll 4.
By separating from b, the connection work is completed. Therefore, the remaining upper single-sided corrugated sheet 25
After the A is consumed, the lower single-sided corrugated sheet 25B is then sent to the preheater section 9 and the gluing device 1.
1 and is supplied to the double facer 20.
The band 68 of the tape bonding device 6 is wound up by a predetermined length by a take-up roll 66, and the next double-sided tape 67 affixed to the band 68 is brought under the pressure roll 63. and waits for the next seat connection.

(Regarding the second connection procedure) Next, the second sheet connection procedure shown in FIGS. 4a to 4d will be described below in relation to the operation of the sheet connection device.

In the corrugator line, as shown in FIG. 4a, the sheet connecting portion 24 in the connecting device 23
Lower single-sided corrugated sheet 25B passing under the
is supplied to the double facer 20 via the preheater section 9 and the gluing device 11, and a B-tier double-sided corrugated board sheet 22 is manufactured. Further, at this time, the upper single-sided corrugated cardboard sheet 25A is stopped and waiting above the sheet connecting portion 24. In the tape bonding device 6, the double-sided tape 67 stuck to the band 68 faces above the lower single-sided corrugated cardboard sheet 25B, and the pressure roll 63 is spaced apart from the band 68. Furthermore, the pressing roll 73 in the pressing device 7 is the fixed roll 7
Separated from 4, the lower single-sided cardboard sheet 25B
is allowed to pass through.

In this state, in response to a command to change the type of double-sided corrugated sheet 22, the lower single-sided corrugated sheet 25B currently being supplied is changed to the upper single-sided corrugated sheet 25B.
5A, first remove the piston cylinder 51 of the lower cutting device 5 in the seat connection portion 24.
is urged in a predetermined direction to cut the lower single-sided corrugated cardboard sheet 25B that is being fed and running, as shown in FIG. 4b. In addition, the upper single-sided cardboard sheet 25 on standby
A is caused to travel downstream by the upper sheet feeding device 4. Note that the running speed of the lower single-sided corrugated paperboard sheet 25B cut at this time is synchronized with the running speed of the upper single-sided corrugated paperboard sheet 25A that has started running. Next, the rear end of the lower single-sided corrugated cardboard sheet 25B is attached to the tape bonding device 6.
At the timing when the position reaches below , the piston cylinder 61 of the device 6 is urged in a predetermined direction. As a result, as shown by the two-dot chain line in FIG. (see Figure 4c).

The tip of the upper single-sided corrugated sheet 25A is
The pressing device 7 is inserted through the guide member 27 shown in FIG.
It is guided between a pressure roll 73 and a fixed roll 74 at. Then, at the timing when the rear end of the lower single-sided corrugated sheet 25B to which the double-sided tape 67 is attached and the tip of the upper single-sided corrugated sheet 25A are supplied to the pressing device 7, the piston cylinder 71 of the pressing device 7 is pressed. Forced in a predetermined direction.
Due to the bias of the piston cylinder 71, the arm 72,
72 tilts, as shown by the two-dot chain line in Figure 2.
The pressure roll 73 moves close to the fixed roll 74,
Upper single-sided corrugated sheet 25A and lower single-sided corrugated sheet 2 supplied between both rolls 73 and 74
5B. As a result, both single-sided corrugated cardboard sheets 25A and 25B are connected via the double-sided tape 67 (see FIG. 4d).

Next, the piston cylinder 7 of the pressing device 7
1 is reversely biased to move the pressure roll 73 to the fixed roll 7.
Separate from 4. Further, the sheet connecting portion 24
The connection work is completed by separating the upper roll 4a of the upper sheet feeding device 4 from the lower roll 4b. Therefore, after the remaining lower single-sided corrugated paperboard sheet 25B is consumed, the upper single-sided corrugated paperboard sheet 25A is subsequently supplied to the double facer 20 through the preheater section 9 and the gluing device 11. The band 68 of the tape bonding device 6 is wound up by a predetermined length by a take-up roll 66, and the next double-sided tape 67 affixed to the band 68 is brought under the pressure roll 63. and waits for the next sheet connection.

Effects of the Invention As described above, according to the connecting device for single-sided corrugated cardboard sheets of different corrugation types according to the present invention, when changing the corrugation type of double-sided corrugated cardboard sheets (or double-sided corrugated cardboard sheets) manufactured by double facers,
The front end of a different single-sided corrugated cardboard sheet can be attached to the rear end of the single-sided corrugated cardboard sheet being fed to the double facer while being moved. Therefore, there is no need to stop the supply of single-sided corrugated cardboard sheets to the double facer, and there is no need to stop the operation of the corrugator line, so that sheet production efficiency can be greatly improved. Further, since the connecting work of single-sided corrugated cardboard sheets can be performed by actuation, there is a great advantage that the operator can be relieved from the dangerous connecting work.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing the main parts of a corrugator line that employs a sheet connecting device according to the present invention;
FIG. 2 is a schematic configuration diagram showing the main parts of the sheet connecting device, FIGS. Figures a to d are schematic process diagrams showing over time the state in which single-sided corrugated sheets are connected by the second connection procedure; Figure 5 is a schematic configuration diagram showing a portion of the corrugator line including the double facer; Figure 6; FIG. 2 is a schematic configuration diagram showing the sheet connecting device shown in FIG. 1 arranged at another location on a corrugator line. 4... Sheet feeding device, 5... Cutting device, 6...
... Tape adhesion device, 7 ... Pressing device, 20 ... Double facer, 22 ... Double-sided corrugated sheet, 2
4... Seat connection part, 25A... Upper side (A stage)
Single-sided cardboard sheet, 25B...lower side (B tier)
Single-sided cardboard sheet, 67...Double-sided tape, 73
...Press roll, 74...Fixed roll, L...Liner.

Claims (1)

[Scope of Claims] 1. When manufacturing a double-sided corrugated sheet 22 by laminating a single-sided corrugated sheet 25A or 25B and a liner L using a double facer 20, the single-sided corrugated sheet 25A or 25B being fed to the double facer 20 is different A device for continuously connecting single-sided corrugated cardboard sheets 25B or 25A of a corrugated type, in which a single-sided corrugated cardboard sheet 25A and a single-sided corrugated cardboard sheet 25B of a different corrugated type are run in a vertical relationship on the upstream side of the double facer 20. A sheet connecting portion 24 that can be stopped freely is provided, and a sheet feeding device 4 that selectively runs and stops one single-sided corrugated cardboard sheet 25A is provided above the sheet connecting portion 24, and the sheet 25A is placed at an arbitrary location. A cutting device 5 for cutting the sheet 25B is disposed in series, and a sheet feeding device 4 for selectively running and stopping the other single-sided corrugated sheet 25B and the sheet 25B are installed below the sheet connecting portion 24. Cutting devices 5 that cut at points are arranged in series, and at the sheet connecting portion 24, the sheet 2
A tape attaching device 6 capable of selectively adhering a tape 67 having adhesive portions on both sides to the leading end or trailing end of the lower single-sided corrugated sheet 25B is disposed downstream of the cutting device 5 of the lower single-sided corrugated sheet 25B, and the sheet connection A sheet located directly downstream of the section 24 and on a sheet travel path common to both the upper single-sided corrugated sheet 25A and the lower single-sided corrugated sheet 25B, is cut by the cutting device 5 and then travels toward the double facer 20. Upper or lower single-sided corrugated sheet 25A or 25B
and the lower or upper single-sided corrugated sheet 25B or 25A, which has started running from the stop standby state, are provided with a pressing device 7 that pinches the lower or upper single-sided corrugated sheet 25B or 25A at a required timing while in the running state, and presses the tip of the lower single-sided corrugated sheet 25B or A single-sided corrugated cardboard sheet of different corrugated types, characterized in that its rear end is adhered to the rear end or tip of the upper single-sided corrugated sheet 25A via a double-sided adhesive tape 67 adhered by the tape adhesive device 6. Connection device.