JP3198517U - Paste residue remover - Google Patents

Abstract

[PROBLEMS] To reliably and efficiently scrape paste residue and dust adhering to the surface of a corrugated cardboard with a simple structure at the time of the manufacture of the corrugated cardboard, and to prevent the surface of the corrugated cardboard from being damaged by the paste residue and the like. An apparatus for removing glue residue that can stably produce corrugated cardboard with high product value is provided. SOLUTION: Two left and right brushes which are arranged to be inclined from a central portion in the width direction on the upstream side of the corrugated board 20 transferred after the gluing step toward both outer side portions in the width direction on the downstream side and are in sliding contact with the upper surface side of the corrugated board 20. The universal joint 10 that connects the ends of the rotary shafts 8 of the two brush rolls at the center in the width direction of the corrugated cardboard 20 and the rolls 7a and 7b; The brush drive unit 12 is connected to the end of the rotary shaft 8 and rotates the two brush rolls 7a and 7b in the direction opposite to the transfer direction of the cardboard 20 with one motor 13. [Selection] Figure 1

Description

  The present invention relates to a glue residue removing apparatus for removing glue residue and dust adhering to the surface of a corrugated board.

When the paste used in the gluing process protrudes from both ends when manufacturing corrugated cardboard, etc., it gradually dries and solidifies, adheres to the surface of the corrugated cardboard, etc., and scratches the surface of the corrugated cardboard, There was a problem of lowering the product value.
In order to prevent the occurrence of this problem, there has been proposed a glue residue removing device for removing glue residue adhering to the surface of a cardboard or the like.
For example, (Patent Document 1) discloses a double facer paste residue removing device that is provided on a hot plate side of a double facer and is provided with a paste residue removing means that is in sliding contact with the lower surface side of a cardboard sheet that runs on the hot plate. Yes.

JP 2004-181744 A

However, the above conventional technique has the following problems.
(1) A removal roll that slides in contact with the surface of a corrugated cardboard sheet and rotates in a direction opposite to the transfer direction is disclosed as a means for removing glue residue in (Patent Document 1).
The removal roll generates a force to scrape off the glue residue, but when the removal roll is made of a hard material such as a metal pipe, the glue residue is pressed against the corrugated sheet side, and the surface of the cardboard May be damaged.
(2) Moreover, when the removal roll is formed of an elastic material such as urethane, there is a problem that the surface of the removal roll is deformed and the glue residue cannot be scraped off sufficiently.
(3) Further, the glue residue removed from the surface of the corrugated cardboard sheet remains attached to the surface of the removing roll due to adhesive force or frictional force. There is also a risk of re-adhering to the surface.
(4) (Patent Document 1) also describes providing a scraping portion for removing glue residue adhering to the surface of the removal roll, but simply engaging the scraping piece with the removal roll. Therefore, it is difficult to remove the glue residue reliably, and there is a problem that the reliability and reliability of the glue residue removal are lacking.
(5) In addition, by having both the removal roll and the scraping part, the number of parts increases, the structure becomes complicated, and cleaning and maintenance of each part is required, and handling and maintenance are lacking. It has a problem.

  The present invention solves the above-mentioned problems, and it is possible to reliably and efficiently scrape off glue residue and dust adhering to the surface of the cardboard with a simple structure, and to drop it on both outer sides in the width direction of the cardboard. Adhesive residue removal with excellent efficiency, certainty, and reliability for removing adhesive residue that can stably produce high quality and high product value corrugated cardboard without damaging the surface of the subsequent corrugated substrate. The purpose is to provide a device.

Means for solving the problems, and actions and effects obtained thereby

In order to solve the above problems, the glue residue removing apparatus of the present invention has the following configuration.
The glue residue removing apparatus according to claim 1 of the present invention is an adhesive residue removing apparatus for removing glue residue adhering to the surface of the corrugated board during the production of the corrugated board, and upstream of the corrugated board transferred after the pasting process. Left and right brush rolls that are arranged to be inclined toward the widthwise outer sides on the downstream side of the corrugated board from the widthwise central part of the cardboard, and two at the widthwise central part of the cardboard A universal joint for connecting the ends of the rotating shafts of the brush rolls, and one motor connected to the end of the rotating shaft of one of the brush rolls at the outer side in the width direction of the cardboard. And a brush driving unit that rotates the brush roll of the book in a direction opposite to the cardboard transfer direction.
This configuration has the following operations and effects.
(1) Two left and right brush rolls that are arranged to be inclined toward the widthwise outer sides on the downstream side of the cardboard from the upstream side in the widthwise direction of the cardboard transferred after the gluing step. And a universal joint that connects the ends of the two brush roll rotating shafts at the center in the width direction of the cardboard, and an end of the corrugated cardboard in the width direction connected to the end of one of the brush rolls. It is equipped with a brush drive unit that rotates two brush rolls in the direction opposite to the cardboard transfer direction with a single motor, so it adheres to the top surface of the cardboard by rotating two brush rolls with one motor. The scraped scraps can be reliably scraped off by each brush roll, and the scraped scraps can be removed from the widthwise center of the corrugated board along the longitudinal direction of each brush roll. It can be moved and dropped to the side, and no glue residue adheres to the surface of the corrugated cardboard after production or the surface of the corrugated cardboard is not damaged by the glue residue. It can be manufactured stably and has excellent efficiency, reliability and reliability in removing glue residue.
(2) The two left and right brush rolls that are in sliding contact with the upper surface side of the cardboard are inclined from the central portion in the width direction on the upstream side of the cardboard toward the outer sides in the width direction on the downstream side of the cardboard. The scraped glue residue automatically moves to the outside in the width direction of the corrugated board and falls outside the corrugated board, eliminating the need for a separate mechanism for removing the glue residue from the brush roll and a mechanism for collecting the glue residue. The number of parts can be reduced, the structure can be simplified and the size can be reduced, and the transportability, mass productivity, and detachability to existing corrugated board manufacturing equipment are excellent.
(3) By providing a universal joint that connects the ends of the rotation shafts of the two brush rolls at the center in the width direction of the cardboard, the two brushes can be simultaneously rotated by one motor. As a result, the space can be saved and driving power can be reduced, resulting in excellent energy saving.

Here, although the material of the bristle material of a brush roll can be selected suitably, synthetic resins, such as polyester and a polypropylene, are used suitably.
Since the width of the corrugated cardboard is standardized, by arranging the brush roll in the range from the outer sides of at least the smallest corrugated cardboard to the outermost sides of the corrugated cardboard, the corrugated cardboard The glue residue generated from both ends in the width direction can be reliably removed, and the versatility is excellent.
A universal joint is a shaft joint used when two axes meet at a certain angle, and is also called a universal joint or a universal coupling. Rotation can be transmitted without being constrained by the intersection angle of the two axes connected, and the angular velocity ratio of the two axes changes depending on the intersection angle of the two axes.

The number of universal joints that connect the ends of the rotating shafts of the two brush rolls may be one or two. When two universal joints are used, the inclination angle of the brush roll can be increased without increasing the load on the universal joint, and the operation stability is excellent. Further, since the central connecting portion connecting the universal joints can be supported by the bearing, each brush roll can be reliably supported at both ends and kept horizontal, and the surface of the corrugated board is The rotation axes of the brush rolls of the book are parallel, the entire brush can be reliably brought into contact with the surface of the corrugated cardboard, and the operation of scraping and discharging the glue residue is excellent in stability and reliability.
The optimum inclination angle of the brush roll can be selected as appropriate according to the transfer speed of the corrugated cardboard, the rotation speed of the brush roll, etc., but the crossing angle of the two axes in one universal joint is preferably 5 degrees to 20 degrees. As the crossing angle of the two axes becomes smaller than 5 degrees, it becomes difficult for the glue residue to move to the outside of the corrugated board, and the waste of the glue residue tends to be lowered, and as it becomes larger than 20 degrees, to the universal joint or motor The load on the brush roll is likely to become unstable, the glue residue is not easily discharged smoothly, the resistance between the surface of the cardboard and the brush roll is increased, and the load on the motor is increased. Therefore, the driving efficiency tends to decrease, which is not preferable.
The motor of the brush drive unit may be connected to the rotation shaft of either the left or right brush roll.

The glue residue removing apparatus according to claim 2 of the present invention is an adhesive residue removing apparatus that removes glue residue adhering to the surface of the corrugated cardboard during manufacture of the corrugated cardboard, and is upstream of the corrugated cardboard transferred after the gluing process. Each of the two left and right brush rolls that are arranged to be inclined from the center in the width direction toward the outer sides in the width direction on the downstream side of the cardboard, and are in sliding contact with the upper surface side of the cardboard. A shaft support portion that rotatably supports one end portion of the rotating shaft, and a motor connected to the other end portion of the rotating shaft of each of the two brush rolls, each brush roll is reverse to the cardboard transfer direction. And a brush drive unit that rotates in the direction.
With this configuration, the following functions and effects are obtained in addition to the functions and effects similar to (2) of claim 1.
(1) Two left and right brush rolls that are arranged to be inclined toward the widthwise outer sides on the downstream side of the cardboard from the upstream side in the widthwise direction of the cardboard transferred after the gluing step. Each brush roll with a shaft supporting part rotatably supporting one end part of each rotating shaft of the two brush rolls, and a motor connected to the other end part of each rotating shaft of the two brush rolls. Since the brush drive unit that rotates in the direction opposite to the cardboard transfer direction is provided, each brush roll is rotated by the two motors of the brush drive unit, whereby the glue residue adhering to the upper surface of the cardboard is transferred to each brush roll. The scraped glue residue is moved along the longitudinal direction of each brush roll from the center side in the width direction of the cardboard toward the outside in the width direction of the cardboard, and dropped. It is possible to stably produce high quality and high product value corrugated cardboard without sticking the glue residue on the surface of the corrugated cardboard or scratching the cardboard surface with glue residue. Excellent efficiency, reliability and reliability in removing glue residue.
(2) A shaft supporting part that rotatably supports one end of each of the rotating shafts of the two brush rolls, and two motors connected to the other end of each of the rotating shafts of the two brush rolls. By providing a brush drive unit that rotates the brush roll in the direction opposite to the cardboard transfer direction, each brush roll can be individually rotated by a separate motor, and extra load is applied to the rotating shaft of the motor and brush roll. It can be rotated smoothly without putting on and has excellent operational stability.

Here, since the optimal inclination angle of the brush roll is the same as that of Claim 1, description is abbreviate | omitted.
When two left and right brush rolls are rotated separately by two motors, either end of the rotation axis of each brush roll is rotatably supported by a shaft support, and the motor is connected to the other end. However, by supporting the end of the two rotating shafts on the center side of the device in a freely rotatable manner by the shaft support portions and attaching the motor to the outer end of the device of each rotating shaft, And other parts do not interfere with each other, and the size of the apparatus can be prevented from being increased.

The invention according to claim 3 is the paste residue removing apparatus according to claim 1 or 2, wherein the two brush rolls on the left and right sides are filiform material planted spirally on the outer periphery of the rotating shaft. And a spiral groove for guiding the glue scraps scraped off by the pili from the center side in the width direction of the cardboard toward the outside in the width direction of the cardboard.
With this configuration, the following functions and effects are provided in addition to the functions and effects of the first or second aspect.
(1) The two brush rolls on the right and left are arranged in a spiral manner on the outer periphery of the rotating shaft, and the glue scraps scraped off by the filiform material from the center side in the width direction of the cardboard to the outer side in the width direction of the cardboard. By providing a spiral groove that guides toward the cardboard, the glue residue scraped off by the ciliate material can be reliably and smoothly moved to both sides in the width direction of the cardboard and discharged, and the glue residue adheres to the cardboard again. In this way, the efficiency and reliability of removing glue residue can be improved.

  Here, in the brush roll that rotates to the right when viewed from the center side in the width direction of the corrugated cardboard, the twisting direction of the filiform material and the spiral groove is left-twisted. And by setting the twist direction of the spiral groove to the right twist, the glue scraps scraped with the rotation of the brush roll are removed from the center side in the width direction of the cardboard along the spiral filaments and the spiral groove. It can move toward both outer sides in the width direction.

Plane schematic diagram of paste residue removing apparatus of Embodiment 1 Schematic front view of the glue residue removing apparatus of the first embodiment Side surface schematic diagram of the glue residue removal apparatus of Embodiment 1. FIG. Schematic front view of the glue residue removing apparatus of the second embodiment

The glue residue removing apparatus of the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiments described below.
(Embodiment 1)
1 is a schematic plan view of the glue residue removing apparatus of the first embodiment, FIG. 2 is a schematic front view of the glue residue removing apparatus of the first embodiment, and FIG. 3 is a glue residue removing apparatus of the first embodiment. FIG.
1 and 2, reference numeral 1 denotes a glue residue removing apparatus according to the first embodiment, 2 denotes a frame of the glue residue removing apparatus 1 disposed in parallel with the width direction of the cardboard 20 to be manufactured, and 3 denotes a longitudinal direction of the frame 2. Brackets 4 of the glue residue removing device 1 disposed at both ends in the direction, 4 is a brush support shaft of the glue residue removing device 1 provided in parallel with the frame 2 between the left and right brackets 3, and 5 is a brush support shaft. 4 is an end brush support portion of the glue residue removing device 1 disposed at both ends of the brush 4, and 6 is a central brush support portion of the glue residue removing device 1 disposed at the center portion of the brush support shaft 4, 7a and 7b. Both end portions are rotatably supported by the end brush support portion 5 and the central brush support portion 6, respectively, and are inclined from the center portion in the width direction on the upstream side of the cardboard 20 toward both outer portions in the width direction on the downstream side of the cardboard 20. Glue paste that is arranged in sliding contact with the upper surface of the cardboard 20 The left and right brush rolls of the leaving device 1, 8 is a rotating shaft of the brush roll 7, 9 is a polyester filiform of the brush roll 7 planted in a spiral shape on the outer periphery of the rotating shaft 8, and 9 a is a filiform material 9, spiral grooves of the brush rolls 7a and 7b for guiding the glue scraps scraped off from the center in the width direction of the corrugated board 20 toward the outer side in the width direction of the corrugated board 20, and one end of each of the spiral grooves 10 on the outer sides of the glue scrap removing device 1 Left and right side universal joints that are connected to the ends of the rotating shafts 8 of the brush rolls 7a and 7b and whose other ends are rotatably held by the left and right end brush support portions 5, respectively, and 11 is one of the left and right brush rolls. 7a and 7b are connected to the end portions of the rotary shaft 8, the other ends are connected to each other at the center portion in the width direction of the glue residue removing device 1, and the connecting portion 11a is rotatably held by the center brush support portion 2. One central universal joint, 12 is glue debris removal equipment Brush driving of the glue residue removing apparatus 1 in which the brush rolls 7a and 7b are rotated in the direction opposite to the transfer direction of the corrugated cardboard 20 by one motor 13 connected to the side universal joint 10 at the left end brush support portion 5 of 1. Part.
In FIG. 3, reference numeral 14 denotes a brush swing mechanism using an air cylinder or the like that is disposed outside the left and right brackets 3 and swings the brush rolls 7 a and 7 b in the vertical direction around the brush support shaft 4.

Although the ends of the rotating shafts 8 of the two brush rolls 7a and 7b can be directly connected by one universal joint, the universal joint 11 can be obtained by using two universal joints 11 as in the present embodiment. The inclination angle of the brush rolls 7a and 7b can be increased without increasing the load on the head, and the operation stability is excellent. Further, since both end portions of the rotating shaft 8 of each of the brush rolls 7a and 7b are rotatably supported by the end brush support portion 5 and the central brush support portion 6 via the universal joints 10 and 11, each brush The rolls 7a and 7b can be kept horizontal. As a result, as shown in FIG. 2, the surface of the cardboard 20 and the rotating shafts 8 of the two brush rolls 7a and 7b are parallel to each other as viewed from the front, and the entire brush can be reliably brought into contact with the surface of the cardboard 20. It is excellent in stability and certainty of scraping and discharging operations such as glue residue.
In addition, the intersection angle of the two axes in each of the universal joints 10 and 11 was set to 5 degrees to 20 degrees. As the crossing angle of the two axes becomes smaller than 5 degrees, it becomes difficult for the glue residue etc. to move to the outside of the corrugated cardboard 20, and the dischargeability of the glue residue etc. tends to decrease, and as it becomes larger than 20 degrees, the universal joint 10 and 11 and the motor 13 are increased in load, the rotation of the brush rolls 7a and 7b is likely to be unstable, and the glue residue is not easily discharged, and the surface of the corrugated cardboard 20 and the brush rolls 7a and 7b. This is because it has been found that there is a tendency that the resistance between the motor and the motor 13 increases, the load on the motor 13 increases, and the driving efficiency tends to decrease.
The motor 13 of the brush drive unit 12 may be connected to the rotating shaft 8 of either the left or right brush roll 7a, 7b.

The operation of the paste residue removing apparatus of the first embodiment configured as described above will be described.
1 and 3, the corrugated board 20 after the gluing process manufactured by the corrugated board manufacturing apparatus is transferred in the direction of arrow a. When the transfer of the cardboard 20 is started, the brush rolls 7a and 7b are lowered in the direction of the arrow b as shown in FIG. Then, by driving the motor 13 (see FIGS. 1 and 2) of the brush drive unit 12, as shown in FIG. 3, the brush rolls 7a and 7b are moved in an arrow c opposite to the cardboard 20 transfer direction (arrow a). Rotate in the direction of.
At this time, the twisted direction of the bristle material 8 and the spiral groove 9 of the brush rolls 7a and 7b when viewed from the center side in the width direction of the corrugated cardboard 20 is opposite to the rotation direction of the brush rolls 7a and 7b. The glue residue and the like scraped with the rotation of the rolls 7a and 7b travels from the center in the width direction of the cardboard 20 toward the outer sides in the width direction of the cardboard 20 along the spiral ciliary material 9 and the spiral groove 9a. It moves smoothly and is discharged to both outer sides of the cardboard 20.
In the case where clogging of the corrugated cardboard 20 occurs, the corrugated cardboard 20 can be easily removed by lifting the brush rolls 7a and 7b upward by the brush swing mechanism 14, and the maintenance is excellent.

The glue residue removing apparatus of the first embodiment configured as described above has the following operation.
(1) Two left and right brush rolls that are arranged to be inclined toward the widthwise outer sides on the downstream side of the cardboard from the upstream side in the widthwise direction of the cardboard transferred after the gluing step. And a universal joint that connects the ends of the two brush roll rotating shafts at the center in the width direction of the cardboard, and an end of the corrugated cardboard in the width direction connected to the end of one of the brush rolls. It is equipped with a brush drive unit that rotates two brush rolls in the direction opposite to the cardboard transfer direction with a single motor, so it adheres to the top surface of the cardboard by rotating two brush rolls with one motor. The scraped scraps can be reliably scraped off by each brush roll, and the scraped scraps can be removed from the widthwise center of the corrugated board along the longitudinal direction of each brush roll. It can be moved and dropped to the side, and no glue residue adheres to the surface of the corrugated cardboard after production or the surface of the corrugated cardboard is not damaged by the glue residue. It can be manufactured stably and has excellent efficiency, reliability and reliability in removing glue residue.
(2) The two left and right brush rolls that are in sliding contact with the upper surface side of the cardboard are inclined from the central portion in the width direction on the upstream side of the cardboard toward the outer sides in the width direction on the downstream side of the cardboard. The scraped glue residue automatically moves to the outside in the width direction of the corrugated board and falls outside the corrugated board, eliminating the need for a separate mechanism for removing the glue residue from the brush roll and a mechanism for collecting the glue residue. The number of parts can be reduced, the structure can be simplified and the size can be reduced, and the transportability, mass productivity, and detachability to existing corrugated board manufacturing equipment are excellent.
(3) By providing a universal joint that connects the ends of the rotation shafts of the two brush rolls at the center in the width direction of the cardboard, the two brushes can be simultaneously rotated by one motor. As a result, the space can be saved and driving power can be reduced, resulting in excellent energy saving.
(4) The two brush rolls on the right and left are arranged in a spiral manner on the outer periphery of the rotating shaft, and the glue scraps scraped off by the filiform material from the center side in the width direction of the cardboard to the outer side in the width direction of the cardboard. By providing a spiral groove that guides toward the cardboard, the glue residue scraped off by the ciliate material can be reliably and smoothly moved to both sides in the width direction of the cardboard and discharged, and the glue residue adheres to the cardboard again. In this way, the efficiency and reliability of removing glue residue can be improved.

(Embodiment 2)
FIG. 4 is a schematic front view of the glue residue removing apparatus of the second embodiment. In addition, the thing similar to Embodiment 1 attaches | subjects the same code | symbol, and abbreviate | omits description.
In FIG. 4, the glue residue removing apparatus 1a of the second embodiment is different from that of the first embodiment in that it is connected to the ends of the rotating shafts 8 of the two brush rolls 7a and 7b at the center in the width direction of the cardboard 20. The central universal joints 11 are not connected to each other by a connecting part 11a, but are separately supported by a shaft support part 11b provided with a bearing so as to be freely rotatable. The motor 13 is connected.
As a result, the left and right brush rolls 7 a and 7 b arranged to be inclined at a predetermined angle can be separately rotated by the two motors 13.
The central universal joint 11 is not necessarily provided, and the end of each rotary shaft 8 can be rotatably supported by a shaft support (bearing). However, as shown in FIG. By connecting the central universal joint 11 to the end, the two shaft support parts 11a can be arranged in parallel, the structure of the central brush support part 6 can be simplified, mass productivity, assembly work Excellent in properties.

  Since the operation of the glue residue removing apparatus 1a of the second embodiment configured as described above is the same as that of the first embodiment except that the left and right brush rolls 7a and 7b are separately rotated by the two motors 13, the description will be given. Omitted.

The glue residue removing apparatus of the second embodiment configured as described above has the following actions in addition to the actions similar to (2) and (4) of the first embodiment.
(1) Two left and right brush rolls that are arranged to be inclined toward the widthwise outer sides on the downstream side of the cardboard from the upstream side in the widthwise direction of the cardboard transferred after the gluing step. Each brush roll with a shaft supporting part rotatably supporting one end part of each rotating shaft of the two brush rolls, and a motor connected to the other end part of each rotating shaft of the two brush rolls. Since the brush drive unit that rotates in the direction opposite to the cardboard transfer direction is provided, each brush roll is rotated by the two motors of the brush drive unit, whereby the glue residue adhering to the upper surface of the cardboard is transferred to each brush roll. The scraped glue residue is moved along the longitudinal direction of each brush roll from the center side in the width direction of the cardboard toward the outside in the width direction of the cardboard, and dropped. It is possible to stably produce high quality and high product value corrugated cardboard without sticking the glue residue on the surface of the corrugated cardboard or scratching the cardboard surface with glue residue. Excellent efficiency, reliability and reliability in removing glue residue.
(2) A shaft supporting part that rotatably supports one end of each of the rotating shafts of the two brush rolls, and two motors connected to the other end of each of the rotating shafts of the two brush rolls. By providing a brush drive unit that rotates the brush roll in the direction opposite to the cardboard transfer direction, each brush roll can be individually rotated by a separate motor, and extra load is applied to the rotating shaft of the motor and brush roll. It can be rotated smoothly without putting on and has excellent operational stability.

  With the present invention, it is possible to reliably and efficiently scrape glue residue and dust adhering to the surface of the corrugated board with a simple structure, and to drop it on both sides in the width direction of the corrugated board. We can provide glue scrap removal equipment with excellent efficiency, certainty and reliability for removing glue scraps that will not be damaged by scraps, etc., and can be attached to existing corrugated board manufacturing equipment to improve the quality and stable production of corrugated board Can contribute.

DESCRIPTION OF SYMBOLS 1 Paste waste removal apparatus 2 Frame 3 Bracket 4 Brush support shaft 5 End brush support portion 6 Central portion brush support portions 7a, 7b Brush roll 8 Rotating shaft 9 Wire bristle material 9a Spiral groove 10 Side universal joint 11 Central universal joint 11a connecting portion 11b shaft support portion 12 brush drive portion 13 motor 14 brush swing mechanism 20 corrugated cardboard

Claims (3)

A paste residue removing apparatus for removing adhesive residue adhering to the surface of the corrugated cardboard during the production of the corrugated cardboard,
Two left and right brush rolls that are arranged to be inclined toward the widthwise outer side on the downstream side of the cardboard from the widthwise center on the upstream side of the cardboard transferred after the gluing step A universal joint that connects the ends of the two rotating shafts of the brush roll at the center in the width direction of the cardboard, and the rotating shaft of one of the brush rolls at the outer side in the width direction of the cardboard. An apparatus for removing glue residue, comprising: a brush driving unit that rotates two brush rolls in a direction opposite to a direction in which the cardboard is transferred by one motor connected to an end. A paste residue removing apparatus for removing adhesive residue adhering to the surface of the corrugated cardboard during the production of the corrugated cardboard,
Two left and right brush rolls that are arranged to be inclined toward the widthwise outer side on the downstream side of the cardboard from the widthwise center on the upstream side of the cardboard transferred after the gluing step And a shaft support portion that rotatably supports one end portion of each of the rotation shafts of the two brush rolls, and a motor connected to the other end portion of the rotation shaft of each of the two brush rolls. A paste residue removing apparatus, comprising: a brush driving unit that rotates the brush roll in a direction opposite to a direction in which the cardboard is transferred. The two brush rolls on the left and right sides are arranged in a width direction of the corrugated cardboard from the central side in the width direction of the corrugated cardboard. The glue residue removing device according to claim 1, further comprising: a spiral groove that guides outward.

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