WO2023021835A1

WO2023021835A1 - Remaining material recovery device

Info

Publication number: WO2023021835A1
Application number: PCT/JP2022/024391
Authority: WO
Inventors: 正人廣安; 聡一寺内
Original assignee: 株式会社瑞光
Priority date: 2021-08-19
Filing date: 2022-06-17
Publication date: 2023-02-23
Also published as: JPWO2023021835A1

Abstract

Provided is a remaining material recovery device capable of separating and recovering a web from a used master roll remaining in a web feeder.　This remaining material recovery device comprises: (a) a suction device (10, 10a, 10b) that is disposed in a web feeder (50, 50a, 50b) and suctions the remaining material of a web (81) that is to be separated from the core material of a master roll (80) among the web (81) of the used master roll (80) in the web feeder (50, 50a, 50b); (b) a conveyance duct (25; 30a, 32a; 30b, 32b) that conveys the remaining material that has been sucked by the suction device (10, 10a, 10b) and separated from the core material; and (c) a recovery box (20, 20a, 20b) that recovers the remaining material conveyed by the conveyance duct (25; 30a, 32a; 30b, 32b).

Description

Remaining material recovery device

The present invention relates to a residual material recovery device, and more particularly to a residual material recovery device that recovers residual materials from a used original roll in a web supply device.

As a device for collecting residual materials that are not used as a product, for example, Patent Document 1 discloses a web supply device that cuts off and collects the leading end of the web before unwinding and supplying the web from a raw roll. there is Further, Patent Document 2 discloses that in a paper machine, the tail is air-flow-conveyed as it is to a collection place.

Japanese Patent No. 3293566 Japanese Patent No. 3718699

Various web supply devices are known that are configured to continuously supply webs by splicing webs of different original rolls.

With such a web supply device, it is necessary to collect used original rolls after the webs of the original rolls have been spliced together.

When a used original roll with a web wound around a core material such as a paper tube contains a web made of a different material than the core material, separate and collect the remaining web materials from the used original roll. There is a need.

In view of this situation, the problem to be solved by the present invention is to provide a residual material recovery device capable of separating and recovering residual web materials from a used original roll in a web supply device.

In order to solve the above problems, the present invention provides a residual material recovery device configured as follows.

The residual material recovery device (a) is disposed in the web supply device and sucks the residual material of the web to be separated from the core material of the original roll used in the web supply device. (b) a conveying duct for conveying the residual material sucked by the suction device and separated from the core material; and (c) a collection box for collecting the residual material conveyed by the conveying duct. Prepare.

According to the above configuration, the remaining material of the web separated from the core material of the used original roll by the web supply device can be collected in the collection box. To separate and recover the remaining web materials more easily and efficiently than in the case of separating and recovering the remaining web materials after removing the used original roll from the web supply device.

Preferably, the suction device has (a) an opening arranged to face the remaining material and sucking the remaining material, and a connecting portion connected to the conveying duct, wherein the opening and the connecting portion and (b) a guide member positioned adjacent to the opening.

In this case, it is possible to ensure that the remaining material on the web is sucked into the opening.

Preferably, the collection box (a) is formed with a plurality of through holes, and the interior space of the collection box is divided into a first space including a bottom surface of the interior space and a second space including a top surface of the interior space. (b) a first connecting portion communicating with the first space and connected to the conveying duct; and (c) communicating with the second space and connected to the blower. (d) a door for opening and closing the bottom surface of the internal space;

In this case, the remaining materials are collected in the lower first space, and the collected remaining materials can be discharged by opening the bottom surface of the collection box.

Preferably, each of the plurality of web supply devices is provided with a plurality of suction devices for sucking the remaining material, and at least one recovery box. Each of the suction ducts has (a) a combined duct having one end connected to the collection box, and (b) each connected at one end to a different one of the suction devices and connected at the other end to the combined duct. and (c) a plurality of on-off valves provided in at least one of the suction device and the tributary duct that are connected to each other.

In this case, by opening the on-off valve as necessary, the remaining web materials can be collected from the multiple web supply devices.

In addition, the present invention provides a heterogeneous residual material recovery device.

The heterogeneous residual material recovery device includes (a) any one of the above residual material recovery devices, wherein the suction device is arranged in the web supply device that supplies one type of the web, and (b) another any one of the above residual material collecting devices, wherein the suction device is arranged on the web feeding device for feeding one type of the web.

In this case, the remaining web materials of different types can be collected separately.

According to the present invention, the web can be separated and collected from the used original roll in the web supply device.

FIG. 1 is a schematic diagram of a web feeder. (Example 1) FIG. 2 is an enlarged view of a main part of FIG. (Example 1) FIG. 3 is an enlarged view of the essential part seen along line AA of FIG. (Example 1) FIG. 4 is a schematic representation of a collection box. (Example 1) FIG. 5 is a schematic view taken along line BB of FIG. (Example 1) FIG. 6 is a flow chart of the remaining material collection procedure. (Example 1) FIG. 7 is an enlarged view of the main part similar to FIG. (Example 1) FIG. 8 is a flow chart of the remaining material collection procedure. (Example 1) FIG. 9 is a flow chart of the operation of the recovery device. (Example 1) FIG. 10(a) is a schematic plan view of the production line, and FIG. 10(b) is a schematic side view of the production line taken along line CC of FIG. 10(a). (Example 2) FIG. 11(a) is a schematic plan view of the production line, and FIG. 11(b) is a schematic side view of the production line taken along line DD of FIG. 11(a). (Example 2)

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1> The remaining material recovery location of Embodiment 1 will be described with reference to FIGS. 1 to 9. FIG.

FIG. 1 is a schematic diagram of a web feeder 50. FIG. FIG. 2 is an enlarged view of a main part seen along line AA in FIG. FIG. 3 is an enlarged view of the essential part seen along line AA of FIG. FIG. 4 is a schematic diagram of the recovery box 20 of the residual material recovery device of the first embodiment. FIG. 5 is a schematic view taken along line BB of FIG.

As shown in FIGS. 1 to 5, in the residual material recovery system of the first embodiment, the suction device 10 is arranged in the web supply device 50, and the suction device 10 passes through the conveying duct 25 (see FIGS. 3 and 4). It is connected to the collection box 20 .

As shown in FIG. 1, the web supply device 50 has two original roll supports 70, 72 to which

original rolls

80, 82 are attached. The web supply device 50 is attached to one of the original fabric roll support parts 70 and is attached to the other original fabric roll support part 72 to wait for the web 81 unwound from one of the original fabric rolls 80 in use. The web of the other unused original roll 82 is joined together, and the web 81 of the one original roll 80 is positioned closer to the one original roll 80 than the joining portion with the web of the other original roll 82. to cut. As a result, the web supply device 50 stops supplying the web 81 from one original roll 80 and starts supplying the web from the other original roll 82 .

Specifically, the web feeder 50 includes a splice unit 56 that moves and splices the web as needed. The splice unit 56 includes a pressure roller 56a, a cutter roller 56b and a guide roller 56c. The pressing roller 56a moves so as to press the web 81 being conveyed against the rotating raw fabric roll 82 when splicing the web. Cutter roller 56b moves and rotates to cut web 81 . The guide rollers 56 c define the conveying path of the web 81 .

The raw fabric

roll support parts

70 and 72 are provided at both ends of the swivel arm 60 that rotates around the central axis 54 .

Auxiliary arms

62 and 64 are fixed to the swivel arm 60, and

guide rollers

74 and 76 are rotatably supported at the distal ends of the

auxiliary arms

62 and 64 to define the web transport path. When the swivel arm 60 rotates by 180°, the positions of the original fabric

roll support portions

70 and 72 are exchanged. The used original fabric roll 80 attached to one of the original fabric roll support parts 70 is replaced with an unused original fabric roll. , 72 are interchanged, and the webs are spliced together in the same manner. By repeating this, the web supply device 50 can continue to supply the web in the direction indicated by the arrow 50x.

As shown in FIGS. 1 and 2, the suction device 10 approaches and faces the other roll 82 of the web 81 of one roll 80 when the web feeding device 50 splices the webs together. It is arranged so as to be adjacent to the intermediate portion between the portion to be held and one of the original fabric rolls 80 , that is, the remaining material to be separated from the core material of the original fabric roll 80 .

As shown in FIGS. 1 to 3, the suction device 10 has a base end of the arm 12 rotatably supported by a first fixed shaft 57 provided in the main body 52 of the web feeding device 50. A suction member 16 and a guide member 18 are fixed to the tip.

Auxiliary shaft 13 is fixed at an intermediate position of arm 12 . The auxiliary shaft 13 is engaged with an engaging member 15x provided at the tip of the piston rod 15 of the air cylinder 14. As shown in FIG. A base end of the air cylinder 14 is engaged with a second fixed shaft 58 provided on the main body 52 of the web feeder 50 . The arm 12 rotates around the first fixed shaft 57 as the piston rod 15 of the air cylinder 14 expands and contracts, and the suction device 10 moves between the home position indicated by the dashed line and the upright position indicated by the solid line. Moving. FIG. 3 illustrates when the arm 12 is vertical between the home position and the standing position.

The suction member 16 is arranged so as to face the web 81 (residual material) when in the upright position indicated by the solid line, and the opening 16a for sucking the web 81 (residual material) is connected to one end 25a of the transport duct 25. It is a hollow member having a connecting portion 16b and communicating between the opening 16a and the connecting portion 16b.

The guide member 18 is arranged adjacent to the opening 16 a of the suction member 16 . The guide member 18 can be configured appropriately, and extends parallel to the opening 16a of the suction member 16, for example. In addition to or instead of such a guide member 18, as shown by broken lines in FIGS. Extending rod-shaped guide members 19 may be arranged on both sides of the web 81 in the width direction. The

guide members

18 and 19 restrict movement of the web 81 around the opening 16a of the suction member 16 so that the web 81 is reliably sucked into the opening 16a.

As shown in FIGS. 4 and 5, the collection box 20 is arranged on the support frame 22. As shown in FIG. A leftover material disposal basket 28 is positioned below the recovery box 20 within the support frame 22 . The remaining material disposal basket 28 is moved in and out of the support frame 22 by the transport device 40 .

The recovery box 20 is configured, for example, in a box shape so as to form an internal space 24 . The internal space 24 is partitioned into a first space 24a including the bottom surface of the internal space 24 and a second space 24b including the top surface of the internal space 24 by a plate member 26 having a plurality of through holes. there is The recovery box 20 has, on its side surface, a first connection portion 24p communicating with the first space 24a and a second connection portion 24q communicating with the second space 24b. The other end 25b of the transport duct 25 is connected to the first connection portion 24p, and the suction device 10 and the collection box 20 are connected to each other via the transport duct 25. As shown in FIG. The second connection portion 24q is connected to a blower (not shown). Air is sucked by the blower toward the opening 16a of the suction member 16 of the suction device 10 as indicated by the arrow 16x, and the air sucked from the opening 16a flows through the conveying duct 25 and the collection box 20 to the blower. . The blower is always operated, and the opening 16a of the suction member 16 of the suction device 10 always sucks.

The recovery box 20 rotates from the state where the bottom surface of the internal space 24 is closed to the position indicated by the chain lines in the directions indicated by arrows 24i and 24j in FIG. It has

doors

24s and 24t that switch to open the bottom surface of the internal space 24 as a result.

Next, the procedure for collecting the remaining materials will be explained with reference to the flowchart in FIG.

As shown in FIG. 6, first, in the web supply device 50, the webs are spliced together by waiting for the swivel arm 60 to stop at the splicing position shown in FIG. 1 (N in S10). When the swivel arm 60 stops at the joint position (Y in S10), the suction device 10 moves to the upright position indicated by the solid line in FIG. 3 (S12). When the suction device 10 moves to the standing position, the web 81 being conveyed by the web supply device 50 faces the opening 16a of the suction member 16 of the suction device 10 and is sucked.

When the upright position of the suction device 10 is detected by a sensor (not shown) (Y in S14), a splicing command signal is sent to the web supply device 50 (S16). In response to the splicing command signal, the web supply device 50 opens a cylinder damper (not shown), operates the splice unit 56 to splice the webs together, and switches the original web roll to supply the web. At this time, the web 81 being conveyed is cut, and the used web 81 on the original fabric roll 80 side is sucked into the opening 16 a of the suction member 16 of the suction device 10 and drawn into the suction member 16 .

The used raw fabric roll 80 continues to rotate in the unwinding direction even after the web 81 is cut (S18). At this time, the rotation speed of the used original fabric roll 80 may be changed so that the web 81 is sucked under tension.

When all the web 81 has been unwound from the used original roll 80 and the exposure of the paper core of the used original roll 80 is detected by the sensor 71 (see FIG. 1) (Y in S20), the used original is The rotation of the anti-roll 80 in the unwinding direction is terminated (S22). The sensor 71 is, for example, a color sensor, and is provided at an appropriate position on the main body of the web feeding device 50, the suction member 16 of the suction device 10, or the like.

When all the web 81 is unwound from the raw roll 80, the paper tube of the raw roll 80 and the web 81 may or may not separate.

For example, the terminal end of the nonwoven fabric web 81 is only in contact with the paper tube, or is temporarily fixed with a weak adhesive force. When separating from the paper tube, the web 81 separated from the paper tube, that is, the remaining material is sucked into the opening 16a of the suction member 16 of the suction device 10, is conveyed through the conveying duct 25 to the collection box 20, and is used Only the paper tube of the raw fabric roll 80 remains.

In this case, the suction member 16 of the suction device 10 then returns to the home position indicated by the dashed line in FIGS. 1 and 2 (S24). Next, a robot (not shown) is instructed to collect the used original roll 80 remaining in the web supply device 50 (S26).

On the other hand, for example, when the end portion of the web 81 of the resin film is joined or adhered to the paper tube and the entire web 81 is unwound from the raw fabric roll 80, the end portion of the web 81 is not separated from the paper tube. appropriately cuts the web 81 remaining between the paper tube and the opening 16 a of the suction member 16 of the suction device 10 .

For example, FIG. 7 is an enlarged view of the main part similar to FIG. 2, and a cutter 11 is added as shown in FIG. The cutter 11 is provided at a position adjacent to the opening 16a of the suction member 16 of the suction device 10, and is retracted by using an air cylinder (not shown).

FIG. 8 is a flowchart when the web 81 does not separate from the paper tube. As shown in FIG. 8, all the web 81 is unwound from the used original fabric roll 80 to expose the paper core of the used original fabric roll 80 in the same manner as when the web 81 is separated from the paper tube. When detected by the sensor 71 (Y in S20), the rotation of the used original fabric roll 80 in the unwinding direction is terminated (S22).

Then, the cutter 11 protrudes in the direction indicated by the arrow 11p in FIG. 7 (S30).

Next, the suction device 10 rotates in the direction indicated by the arrow 10x in FIG. 7 and returns to the home position indicated by the dashed line (S32). At this time, as the suction device 10 rotates, the cutting edge of the cutter 11 is pressed against the web 81 remaining between the paper tube and the opening 16a of the suction member 16 of the suction device 10, and the web 81 is cut. be. Of the cut web 81, the portion opposite to the paper tube, that is, the remaining material is sucked into the opening 16a of the suction member 16 of the suction device 10 and conveyed to the collection box 20 through the conveying duct 25. . The paper tube side of the web 81 cut by the cutter 11 remains as the used raw fabric roll 80 while being joined or adhered to the paper tube.

Next, the cutter 11 retreats in the direction indicated by the arrow 11q in FIG. 7 (S34), and commands a robot (not shown) to collect the used original roll 80 remaining in the web supply device 50 (S36).

FIG. 9 is a flowchart for collecting residual materials from the collection box 20 of the residual material collection device.

As shown in FIG. 9, it is determined whether or not the remaining time until the web feeder 50 next starts splicing the webs is equal to or longer than a certain amount (S50), and the collection box 20 has a predetermined number of remaining materials (for example, It is determined whether or not there are more than one) (S52), and whether or not the remaining material disposal basket 28 is arranged under the recovery box 20 (S54). Since the number of remaining materials in the collection box 20 matches the number of times the web supply device 50 spliced the webs together after discharging the remaining materials from the collection box 20, the operations of the web supply device 50 and the remaining material collection device can be determined by monitoring Whether or not the remaining material disposal basket 28 is placed under the recovery box 20 can be determined by monitoring the operation of the transport device 40 .

When the remaining time is equal to or longer than a certain amount (Y at S50), the number of remaining materials in the recovery box 20 is equal to or greater than a predetermined number (Y at S52), and the remaining material disposal basket 28 exists under the recovery box 20 (S54 at Y), a butterfly valve (not shown) provided between the recovery box 20 and the blower is closed (S56). As a result, the remaining materials whose movement is blocked by the plate member 26 in the collection box 20 fall to the bottom surface of the internal space 24 .

Next, the

air cylinders

24m and 24n are operated to open the

doors

24s and 24t of the collection box 20 (S58). As a result, the remaining materials in the recovery box 20 are discharged into the remaining material disposal basket 28 .

After a predetermined time has passed (Y in S60), the

air cylinders

24m and 24n are activated to close the

doors

24s and 24t of the collection box 20 (S62). Next, the butterfly valve is opened (S64), the recovery box 20 is ready to recover the remaining materials, and the process returns to determination (S50).

As described above, the suction device 10 sucks the remaining material of the web 81 to be separated from the core material of the original roll 80 out of the web 81 of the used original roll 80 in the web supply device 50 . . The conveying duct 25 conveys the remaining material that has been sucked by the suction device 10 and separated from the core material. The collection box 20 collects the remaining materials transported by the transport duct 25 .

The remaining materials are prevented from moving within the internal space 24 of the collection box 20 by the plate member 26 and are collected in the first space 24a. When the

doors

24 s and 24 t of the recovery box 20 are opened while the suction is stopped, the remaining materials are discharged into the remaining material disposal basket 28 arranged below the recovery box 20 . The remaining material disposal basket 28 is conveyed by the conveying device 40, and the remaining materials are collected.

Therefore, the residual material recovery device of Example 1 can separate and recover the web 81 from the used original fabric roll 80 remaining in the web supply device 50 . In addition, the web 81 can be separated and collected more easily and efficiently than when the web 81 is separated and collected after the used original roll 80 is removed from the web supply device 50 .

<Embodiment 2> A heterogeneous residual material recovery apparatus according to Embodiment 2, which includes a plurality of residual material recovery apparatuses, will be described with reference to FIGS. 10 and 11. FIG. 10(a) and 11(a) are schematic plan views of the production line including the heterogeneous residual material recovery device, and FIGS. 10(b) and 11(b) are side views of the production line including the heterogeneous residual material recovery device. It is a schematic. FIG. 10(b) is a schematic side view taken along line CC of FIG. 10(a). FIG. 11(b) is a schematic side view taken along line DD of FIG. 11(a).

As shown in FIG. 10, there are a plurality of first web supply devices 50a that supply webs made of nonwoven fabric, and a plurality of (two in FIG. 10) second web supply devices 50b that supply webs made of resin films. are arranged in a row to supply the web to a processing machine line (not shown). Although not shown, a conveying device is arranged with a gap between it and the row of

web feeding devices

50a and 50b, and a robot moves between the

web feeding devices

50a and 50b and the conveying device. The conveying device conveys unused original rolls and used original rolls. The robot attaches unused material rolls on the transport device to the

web supply devices

50a and 50b, and removes used material rolls from the

web supply devices

50a and 50b and places them on the transport device.

The heterogeneous residual material recovery device of the second embodiment includes a first residual material recovery device that recovers nonwoven fabric residue materials from the first web supply device 50a, and recovers resin film residue materials from the second web supply device 50b. and a second residual material recovery device.

As shown in FIGS. 10 and 11, the first residual material recovery device has a plurality of suction devices 10a arranged in each of the first web supply devices 50a and one recovery box 20a. The second residual material recovery device has a plurality of suction devices 10b arranged in each of the second web supply devices 50b and one recovery box 20b. The first and/or second residual material collection device may have multiple collection boxes.

The

suction devices

10a and 10b are configured in the same manner as the suction device 10 of the first embodiment.

As shown in FIG. 11, the

collection boxes

20a and 20b are arranged on

support frames

22a and 22b, like the collection box 20 of the first embodiment.

Collection boxes

20a and 20b are connected to blowers (not shown) through

ducts

34a and 34b, and air flows in directions indicated by

arrows

36a and 36b. Leftover

material disposal baskets

28a, 28b are arranged below the

collection boxes

20a, 20b in the support frames 22a, 22b. The remaining

material disposal baskets

28a, 28b are moved in and out of the support frame 22a by

transport devices

40a, 40b.

As shown in FIG. 10, unlike the residual material recovery apparatus of the first embodiment, the first residual material recovery apparatus has a confluence duct 30a and a plurality of branch ducts 32a between the recovery box 20a and the plurality of suction devices 10a. are connected to each other through One end of the confluence duct 30a is connected to the recovery box 20a. One end of the branch duct 32a is connected to a different one of the suction devices 10a, and the other end is connected to the confluence duct 30a.

In order to control the suction of each suction device 10a, each branch duct 32a is provided with an on-off valve 33a. The on-off valve 33a may be provided in the suction device 10a instead of the branch duct 32a. Also, the on-off valve 33a may be provided in both the suction device 10a and the branch duct 32a. That is, the on-off valve 33a is provided in at least one of the mutually connected suction device 10a and the branch duct 32a.

The opening/closing of the opening/closing valve 33a is controlled by a control device (not shown) and is normally closed. The control device is connected to the on-off valve 33a corresponding to the web supply device 50a (that is, the suction device 10a arranged in the web supply device 50a) when a used material roll is generated in the web supply device 50a. The on-off valve 33a) provided in the tributary duct 32a is opened to suck the remaining material from the suction device 10a arranged in the web supply device 50a so that it can be collected in the collection box 20a.

Similar to the first residual material recovery apparatus, the second residual material recovery apparatus has one end connected to a confluence duct 30b connected to the recovery box 20b and one end connected to a different one of the suction device 10b. and a plurality of branch ducts 32b having the other end connected to the confluence duct 30b, and a plurality of on-off valves 33b provided in at least one of the mutually connected suction device 10b and the branch duct 32b.

The heterogeneous residual material recovery device of the second embodiment can separate and recover the residual nonwoven fabric material and the residual resin film material by the first and second residual material recovery devices. In addition, the remaining materials can be separated and collected more easily and efficiently than in the case where the web is separated and collected after the used original roll is removed from the web supply device.

<Modification 1> Only one of the first and second residual material recovery devices of the second embodiment may be provided.

<Modification 2> The number of the first and/or second

web supply devices

50a and 50b of the second embodiment may be one. In that case, the first and/or second residual material recovery device in which one web supply device 50a and/or 50b is provided with one suction device 10a and/or 10b is similar to the residual material recovery device of the first embodiment. can be configured in the same way as

<Summary> As described above, by using the residual material recovery device, the residual materials can be separated and recovered from the original rolls that have been used by the

web supply devices

50, 50a, and 50b.

It should be noted that the present invention is not limited to the above embodiments, and can be implemented with various modifications.

For example, the web supply device can appropriately select a type that connects webs together. For example, the web supply device may be of a type that connects the webs of the original rolls that are rotating, or of a type that connects the webs of the original rolls that are stopped.

10, 10a, 10b suction device 16 suction member 16a opening

16b connecting portion

18, 19

guide member

20, 20a, 20b collection box 24 internal space 24a first space 24b second space 24p first connecting portion 24q second Connecting

portion

24s, 24t Door 25 Conveying duct 26

Plate member

30a,

30b Merging duct

32a,

32b Branch duct

33a, 33b Open/

close valve

50, 50a, 50b Web supply device

Claims

a suction device arranged in a web supply device for sucking the remaining material of the web to be separated from the core material of the original roll from the web of the used original roll in the web supply device;
a conveying duct that conveys the remaining material that has been sucked by the suction device and separated from the core material;
a recovery box for recovering the remaining materials transported by the transport duct;
A residual material recovery device with a
The suction device is
a suction member having an opening arranged to face the residual material and sucking the residual material, and a connecting portion connected to the conveying duct, wherein the opening and the connecting portion communicate with each other; ,
a guide member disposed adjacent to the opening;
The residual material recovery device according to claim 1, comprising:
The collection box is
a plate member having a plurality of through-holes and partitioning the interior space of the recovery box into a first space including the bottom surface of the interior space and a second space including the top surface of the interior space;
a first connecting portion communicating with the first space and connected to the transport duct;
a second connection portion communicating with the second space and connected to a blower;
a door that opens and closes the bottom surface of the internal space;
The residual material recovery device according to claim 1 or 2, comprising:
a plurality of suction devices arranged in each of a plurality of web supply devices for sucking the remaining material;
at least one collection box;
with
The suction duct is
a confluence duct having one end connected to the recovery box;
a plurality of tributary ducts each having one end connected to a different one of the suction devices and the other end connected to the confluence duct;
a plurality of on-off valves provided in at least one of the suction device and the tributary duct that are connected to each other;
The residual material recovery device according to claim 1, comprising:
5. One residual material recovery device according to any one of claims 1 to 4, wherein the suction device is arranged in the web supply device that supplies one type of the web;
5. Another residual material recovery device according to any one of claims 1 to 4, wherein the suction device is arranged in the web supply device that supplies another kind of the web;
Heterogeneous residual material recovery device.