JP4353752B2 - Carton cleaning method and apparatus - Google Patents

Description

  The present invention relates to a carton cleaning method and apparatus, and more particularly to a carton cleaning method and apparatus capable of automatically cleaning the inner and outer surfaces of a plastic carton that is repeatedly used as, for example, a return box.

  Recently, plastic cartons have been used as packing boxes for packing and transporting products from factories to customers. The returned plastic carton is washed and reused each time in order to keep the product to be packed clean. Such plastic cartons are usually folded and returned flat by opening the flaps and pressing the body diagonally, but an apparatus for automatically or semi-automatically cleaning the returned plastic cartons has been proposed. People wipe the inside and outside surfaces with a cloth soaked in alcohol. As other methods, a method of washing a carton in a shower type using hot water or a method of blowing off jet air to remove dirt is employed. Since these methods are carried out manually and require heavy labor and work efficiency is poor, the method using warm water requires another dehydrator or dryer to remove the water remaining in the carton, There was a problem that the remaining moisture that could not be dried could cause the generation of bacteria. On the other hand, when it is removed by jet air, there are problems such as dust scattering and dirt that cannot be removed by air pressure.

On the other hand, the conventional plastic carton has a cylindrical shape with the body part connected endlessly, and in particular, it is difficult to clean the inner surface side, and automation of cleaning has not been realized, but in order to facilitate cleaning A method of making the body part of a plastic carton freely connectable, releasing the engagement of the joint part after use and developing it into a single panel shape, thereby facilitating cleaning of the inner and outer surfaces, and immersing and cleaning in a cleaning liquid ( Patent Document 1) has been proposed. Further, an automatic cleaning system for automatically cleaning a plastic carton developed in a sheet shape has also been proposed (see Patent Document 2). What is proposed in this document is that a carton developed in a sheet is conveyed between rolls, while a cleaning process is performed by spraying a cleaning agent from both sides, a water absorption process is performed by contact of a water absorption roll, and hot air is sprayed. It is an automatic washing and drying system that performs washing and drying through a drying process by the above.
JP 2003-112789 A Japanese Patent Laid-Open No. 2003-1555023

  The above-described conventionally proposed plastic carton cleaning device deploys and cleans the plastic carton on a single sheet, so the plastic carton has to be developed and assembled, and the conventional body is connected. There is a problem that it cannot be applied to the cleaning of ordinary plastic cartons. In addition, since washing is performed using washing water, as described above, another dehydrator or dryer is required to remove moisture remaining in the carton, or the possibility of generation of bacteria in the remaining moisture. There was a problem that there was. In addition to plastic cartons, even cartons made of paper or other materials, in the case of cartons that are used repeatedly, cleaning of the inner and outer surfaces is necessary. No internal or external surface cleaning device has been proposed.

  Therefore, the main object of the present invention is to provide a carton cleaning method and apparatus capable of automatically cleaning the inner and outer surfaces of a foldable carton to which the body part is connected, and is effective without using cleaning water. The present invention is to provide a carton cleaning method and apparatus that can be cleaned without any need for a dehydration / drying device, can be cleaned without the possibility of moisture remaining, and can automatically clean a dirty cleaning roll. Objective.

The carton cleaning method of the present invention that solves the above-mentioned problems is the outer surface cleaning roll in which the inner surface cleaning roll is impregnated with the inner surface cleaning roll and the inner surface cleaning roll impregnated with the cleaning agent. By rotating and driving the inner surface cleaning roll and the outer surface cleaning roll in a state where the carton is sandwiched between the inner and outer surfaces, the inner and outer surfaces of the carton are simultaneously cleaned while being fed endlessly between the inner surface cleaning roll and the outer surface cleaning roll. It has the simultaneous cleaning process and has the outer surface rough wiping process of roughly wiping the outer surface of the carton before the inner and outer surface simultaneous cleaning process by the rough wiping roll disposed on the upstream side of the outer surface cleaning roll. It is a feature.

In the carton cleaning apparatus of the present invention that solves the above-mentioned problems, the inner surface cleaning roll that can be rotationally driven and cantilevered so that the body portion can be inserted into an endless carton is disposed opposite to the inner surface cleaning roll. An outer surface cleaning roll, a driving device that rotationally drives the inner surface cleaning roll, a driving device that rotationally drives the outer surface cleaning roll, the inner surface cleaning roll and the outer surface cleaning roll each have a surface layer that can be impregnated with a cleaning agent, And a carton attachment / detachment position, and a carton cleaning position for cleaning while rotating and feeding the carton between the inner and outer surface cleaning rolls and the outer surface cleaning roll, and upstream of the outer surface cleaning roll. The most important feature is that a rough wiping roll is provided to contact the outer surface of the carton and wipe the outer surface of the carton .

  The carton cleaning method and apparatus of the present invention has the advantage that a normal carton connected to the body portion can be automatically and simultaneously cleaned without developing the carton. In addition, the use of a volatile cleaning agent has the advantage that it can be cleaned effectively without using cleaning water, no dehydration / drying device is required, and cleaning can be performed without the possibility of moisture remaining.

1 to 4 are conceptual diagrams showing an embodiment of the present invention, and FIG. 1 shows a state during a cleaning operation of a plastic carton.
In the carton cleaning apparatus of the present invention, the plastic carton 50 is fitted into the inner surface cleaning roll 1 with the upper and lower blanks expanded, and the inner surface cleaning roll 1 and the outer surface cleaning roll 2 containing the cleaning agent are used to The inner and outer surfaces are sandwiched between the inner and outer surfaces, and the inner and outer surfaces are simultaneously cleaned while being sandwiched and fed by the rotation of both rolls. As the cleaning agent, it is preferable to use a volatile cleaning agent such as a volatile alcohol preparation so that water does not remain in the plastic carton after cleaning, but neutral detergents, water, and the like can also be applied. Further, the inner surface cleaning roll and the outer surface cleaning roll are preferably a sponge roll having a sponge layer in which at least the outer peripheral surface can be impregnated with the cleaning agent, but is not limited thereto.

  Of the inner surface cleaning roll 1 and the outer surface cleaning roll 2, at least the inner surface cleaning roller 2 is cantilevered by supporting only one side of the driving side with a bearing, and either one or both of the rollers are used as a counterpart roller. It is configured to be relatively movable in the radial direction with respect to the inner cleaning roll 1 that is cantilevered with the gap between the rolls being relatively close to and separating from each other and the gap between the rolls being open. The plastic carton 50 can be positioned between a pair of rolls by inserting the cylindrical plastic carton 50 opened. Then, the plastic cartons 50 can be sandwiched between the inner and outer surfaces by a pair of cleaning rolls by bringing both rolls close to each other, and by rotating both rolls, as shown in FIG. While automatically rotating 50, dirt on the inner and outer surfaces can be wiped off by frictional contact with both rolls containing a cleaning agent. At that time, by providing a difference in speed between the pair of cleaning rolls, a speed difference is generated between the plastic carton surface and the roll surface, and the wiping effect can be further enhanced.

  Further, in order to slow down the dirt on the outer surface cleaning roll, which is more dirty than the inner surface cleaning roll, by providing a rough wiping roll 18 on the upstream side of the outer surface cleaning roll, the outer surface is cleaned before wiping with the outer surface cleaning roll 2. By wiping with a rough wiping roll and pre-cleaning, the degree of dirt progress of the outer surface roll was made to be substantially the same as that of the inner surface cleaning roll, and the cleaning intervals of both cleaning rolls themselves were adjusted. The preliminary cleaning step is not limited to the case where the rough wiping roll 18 composed of the sponge roll is arranged as described above. For example, the nonwoven fabric is set on a plate and the nonwoven fabric surface is rotated in front of the outer surface cleaning roll. It is also possible to roughly wipe the outer surface by pressing against the outer surface of the plastic carton. In that case, by setting the non-woven fabric to be fed by a predetermined length for each sheet of the plastic carton, the new part can always come into contact with the outer surface of the plastic carton and the wiping assist effect can be enhanced.

  The plastic carton 50 is fed endlessly with the flaps expanded, but it can be fed endlessly by bending from the creases at the four corners of the body, and the body between the bends and the straight part of the flap are in a straight state. Since the movement is maintained, the feed angle of the plastic carton 50 between the inner surface cleaning roll 1 and the outer surface cleaning roll 2 (incident angle with respect to both rolls) always varies as shown in FIG. Therefore, the rough wiping roll 18 must move back and forth following the movement of the plastic carton 50 as shown by broken lines and arrows in FIGS. In order to make this possible, in this embodiment, the rough wiping roll 18 is supported in a state of being urged toward the passing side of the plastic carton, and can be moved against the urging force by the pressing force generated by the rotation of the plastic carton 50. Thus, while allowing the passage of the plastic carton, the rough wiping roll 18 always rotates in contact with the plastic carton to enable rough wiping of the outer surface.

In the plastic carton 50, as shown in FIG. 3, the body 51 is continuous in a cylindrical shape.
Since the flap portion 52 is not continuous but is separated at the corner portion, the flap portion 52 has an end edge 53 with respect to the rotation direction, and the front end edge 54 is a right-angled edge. Therefore, when the plastic carton is fed by both cleaning rolls and rotated, as shown in FIG. 2 (a), the flap edge 53 cannot follow the feeding angle of the body part and is opened outward. There is a risk that the protruding angle increases with respect to the roll, and the surface of the rough wiping roll hits and scratches like a scratch. Therefore, in this embodiment, the protector plate 30 is provided on the upper side of the rough wiping roll 18 so as to move integrally with the rough roll. The protector plate 30 does not need to be provided over the entire length of the rough wiping roll 18, and may be provided only on both end sides where the flaps 52, 52 on both sides hit. By providing the protector plate, when the flap comes into contact with the rough wiping roll, as shown in FIG. 1 (c), the flap edge 53 hits the protector plate, and the protruding state of the edge 53 is corrected. A contact angle can be made small and it can be made to contact a rough wiping roll smoothly. When the rough wiping roll is provided on the upstream side of the outer surface cleaning roll as in this embodiment, it is possible to prevent the inner and outer surface cleaning rolls from being scratched only by providing the protector plate only on the rough wiping roll. When the wiping roll 18 is not provided or when the rough wiping roll is provided apart from the outer surface cleaning roll, the protector plate is similarly provided above the outer surface cleaning roll to prevent the outer surface cleaning roll from being damaged. be able to. Furthermore, by increasing the rotational speed of the outer surface roll and rough wiping roll faster than the inner surface cleaning roll, the wiping effect is increased as described above, and the edge of the flap becomes difficult to be caught, so that the surface of these rolls can be prevented from being damaged. There is also an effect.

  Since the inner surface cleaning roll, the outer surface cleaning roll, and the rough wiping roll are gradually soiled by cleaning a plurality of plastic cartons, it is necessary to clean these rolls themselves. Therefore, the present invention has a cleaning process and a cleaning means for cleaning these rolls themselves after cleaning a predetermined number of plastic cartons. The roll cleaning means of the inner surface cleaning roll and the outer surface cleaning roll has an inner and outer surface cleaning roll cleaning tank having an opening that can accommodate the inner surface cleaning roll and the outer surface cleaning roll in the apparatus main body, and the inner and outer surface cleaning roll cleaning tank is a roll It is configured to be slidable between a cleaning position and a retracted position and to be movable up and down toward the inner surface cleaning roll and the outer surface cleaning roll at the roll cleaning position. Cleaning the inner surface cleaning roll and the outer surface cleaning roll by the cleaning means moves the cleaning tank to the position of the inner surface cleaning roll and the outer surface cleaning roll in a state where the inner surface cleaning roll and the outer surface cleaning roll are close to each other, and raises the cleaning tank. The two cleaning rolls are rotated by being immersed in a cleaning solution of the cleaning tank in a state of about 1/2 to 1/3 in the radial direction. In that case, it can wash | clean more effectively by arrange | positioning a squeeze roll in a washing tank and wash | cleaning, pressing with a squeeze roll. Then, after cleaning, drain the cleaning liquid from the cleaning tank, and then continue to push both cleaning rolls against the squeeze roll and rotate to squeeze the cleaning liquid that has soaked into the cleaning roll, and set the cleaning roll impregnation degree to the appropriate value. Secure and prepare for the next plastic carton cleaning.

  The cleaning means for the rough wiping roll has a rough wiping roll cleaning tank having an opening capable of accommodating the rough wiping roll in the apparatus main body, and the rough wiping roll cleaning tank has the rough wiping roll in the rough wiping roll cleaning position. At this time, it is configured to be movable up and down with respect to the rough wiping roll. The cleaning of the rough wiping roll is performed by sliding the rough wiping roll up to the position above the position where the rough wiping roll cleaning tank is located, raising the rough wiping roll cleaning tank at that position, and cleaning the inner surface cleaning roll and the outer surface cleaning roll. Washing and impregnation with a washing solution are performed in the same manner as washing.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. This example embodies the embodiment shown in FIG. 1, and components corresponding to those in the embodiment are given the same reference numerals.
4 is a plan view showing the state before the start of cleaning in which the inner surface cleaning roll 1 and the outer surface cleaning roll 2 are separated and a plastic carton can be fitted to the inner surface cleaning roll, and FIG. 5 is an arrow AA in FIG. FIG. 6 is a BB arrow view of FIG. 5, and FIG. 7 is a right side schematic view. In the inner surface cleaning roll 1, a roll shaft is supported in a cantilever manner on a sliding frame 5 that can move left and right in FIG. 5 by a sliding cylinder 4 provided in the main body frame 3. An inner surface cleaning roll drive motor 6 is also fixedly supported on the sliding frame 5, and slides integrally with the inner surface cleaning roll as the sliding frame slides. Further, a support column 8 for supporting the auxiliary roll 7 is erected and fixed to the sliding frame 5. The auxiliary roll 7 is a free rotating roll for supporting and guiding the upper side of the plastic carton to be cleaned, and is rotatably supported by a bearing provided on the support column 8. The support 8 can be adjusted in height, so that the auxiliary roll can always be set at an appropriate position according to the size of the plastic carton to be cleaned. For cleaning various plastic cartons having different sizes. Convenient. In this way, the inner surface cleaning roll 1 and the auxiliary roll 7 are unitized so as to move horizontally in FIG. As shown in FIG. 5, the positional relationship between the inner surface cleaning roll 1 and the auxiliary roll 7 is such that the auxiliary roll is positioned slightly upstream and rearward in the rotational direction of the plastic carton of the inner surface cleaning roll. To smooth.

  The open side shaft ends of the inner surface cleaning roll 1 and the auxiliary roll 7 are connected so as to maintain a parallel state with each other by a connecting piece 10 (FIG. 4), and a metal fitting having a U-shaped female hole on the outer side of the connecting piece 10 When the inner surface cleaning roll 1 reaches the cleaning operation position where the outer surface cleaning roll 2 and the plastic carton are sandwiched and fed, the socket 11 is provided on the frame 12 on the outer surface cleaning roll side. The positioning plug 13 is engaged with the positioning plug 13 (FIG. 4) to prevent the vibration on the free shaft end sides of the inner surface cleaning roll 1 and the auxiliary roll 7 during the cleaning driving rotation. The positioning plug has, for example, a projection that fits into the female hole of the socket 11, and the positioning plug 13 and the socket 11 are fitted and positioned by rotating the plug with the rotary cylinder 14 (FIG. 6). However, the present invention is not limited to this configuration, and any configuration can be adopted as long as the inner surface cleaning roll 1 and the auxiliary roll 7 can be engaged when they reach the cleaning position.

  The outer surface cleaning roll 2 faces the inner surface cleaning roll 1 and is supported by a bracket 15 fixed to the main body frame 3, and is rotationally driven by an outer surface cleaning roll drive motor 16. The outer surface cleaning roll is also made of a sponge-like material whose outer peripheral surface can be impregnated with a cleaning agent. In this embodiment, a rough wiping roll 18 is provided above the outer surface cleaning roll, and the outer surface of the plastic carton is roughly wiped before wiping with the outer surface cleaning roll. The rough wiping roll 18 has a sliding frame 23 provided on a sliding frame 21 (FIG. 5) provided on the left and right sliding cylinder 20 installed on the main body frame 3 on one side and a sliding frame 23 provided on the rail 22 on the other side. (FIG. 7) and is arranged so that it can move left and right in FIG. 5 on the main body frame. The rough wiping roll 18 can be moved back and forth following the movement of the plastic carton fed endlessly while being bent by the creases at the four corners of the body part. By urging and supporting on the passing side and making it movable against the urging force by the pressing force caused by the rotation of the plastic carton, it is always possible to rotate in contact with the plastic carton while allowing the plastic carton to pass. . More specifically, as clearly shown in FIG. 7, a slide plate 24 is slidably provided on the slide frame 23, a rough wiping roll 18 is provided on the slide plate, and the slide plate 24 and the slide frame are provided. A spring 26 is stretched between the guide plate 25 and the guide plate 25 fixed to 23, and the rough wiping roll is always urged to abut against the plastic carton. In FIG. 7, for the sake of easy understanding of the configuration, the other configuration is omitted and only the sliding frame 23 on one side is shown, but a similar biasing mechanism is also provided on the sliding frame 21 on the opposite side.

  The rough wiping roll 18 is rotatably supported by bearings attached to both ends of a beam 27 having a cross-sectional shape shown in FIGS. 5 and 7 spanned between slide plates 24 and 28 on both sides. One slide plate 28 is provided with a rough wiping roll drive motor 29 so that it can slide integrally with the rough wiping roll. Further, at the position where the flaps 52, 52 (FIG. 3) are in contact with both ends of the beam 27 when the plastic carton is cleaned, the edge of the flap is prevented from hitting the rough wiping roll at an acute angle and damaging the roll. Further, a protector plate 30 having a flap contact surface for guiding the flap downward is provided as shown in the figure.

  Although the mechanism for cleaning the plastic carton is as described above, the apparatus of this embodiment is provided with a mechanism for automatically cleaning the inner surface cleaning roll, the outer surface cleaning roll, and the rough wiping roll itself, and an arbitrary number of plastics By washing these rolls every time the carton is washed, it is possible to maintain a good degree of washing of the plastic carton without frequently changing the washing rolls. In the present embodiment, two sets of cleaning devices are provided so that the inner surface cleaning roll 1 and the outer surface cleaning roll 2 are cleaned by the same cleaning device, and the rough wiping roll is cleaned by a separate cleaning device.

  As shown in FIG. 9, the inner and outer surface cleaning roll cleaning device for cleaning the inner surface cleaning roll 1 and the outer surface cleaning roll 2 enters near the lower half of both rolls with the inner surface cleaning roll 1 and the outer surface cleaning roll 2 approaching each other. The cleaning tank 36 has an inner / outer surface cleaning roll 36 having a size, and a cleaning liquid is filled in the cleaning tank and a pair of freely rotating squeeze rolls 37 are provided. As clearly shown in FIG. 6, a pair of elevating guide rods 41 protrudes and is fixed to the outer surface of the bottom wall of the cleaning tank 36, and the elevating guide rods 41 are attached to the movable portion 39 of the sliding cylinder 38. A pair of sliding bearings 42 provided on the fixed support plate 40 are fitted. Accordingly, the inner / outer surface cleaning roll cleaning tank 36 is supported by the support plate 40 so as to be movable up and down, and slides to the left and right in FIG. The cleaning tank 36 is normally located at the position shown in FIG. 4 and moves to a position below the outer surface cleaning roll during roll cleaning. As shown in FIG. 9, a pair of elevating cylinders 43 are provided in the main body frame below the cleaning position, and when the inner and outer surface cleaning roll cleaning tank 36 reaches this position during roll cleaning, the elevating cylinder 43 is activated. As a result, the upper part of the inner surface cleaning roll and the outer surface cleaning roll are soaked in the cleaning liquid in the cleaning tank, and the outer periphery of the lower end rises to the squeeze roll 37. In this state, both rolls are driven simultaneously by rotating both rolls.

The inner and outer surface cleaning roll cleaning tank 36 is connected to an external cleaning liquid tank, and a predetermined amount of cleaning liquid is supplied from the cleaning liquid tank only at the time of cleaning, and after cleaning is filtered through the filter, returned to the cleaning liquid tank for circulation use. It has come to be. The cleaning time can be arbitrarily set with a timer, for example, and at the time of cleaning, as shown in FIG. 9, the inner surface cleaning roll 1 is held at a position closest to the outer surface cleaning roll, and in this state, the cleaning tank 36 is in the state of these rolls. It moves to a lower position and rises so that a part of both rolls is located in the cleaning tank. In this state, the cleaning liquid is supplied to the inner / outer surface cleaning roll cleaning tank, and the roll is cleaned for a predetermined time. During cleaning, both rolls are driven to rotate and rotate while being pressed against the squeeze roll in the cleaning liquid, so that the dirt soaked into the sponge can be effectively removed. After the cleaning, the cleaning liquid is discharged in that state and rotated again, so that the cleaning liquid soaked into the cleaning roll is narrowed, and the amount of the cleaning liquid impregnated in the roll can be adjusted.

  On the other hand, the rough wiping roll cleaning device for cleaning the rough wiping roll 18 has substantially the same structure as the inner and outer surface cleaning roll cleaning device, but unlike the inner and outer surface cleaning roll cleaning device, do not slide in the horizontal direction. Only vertical movement is possible. That is, the bottom of the rough wiping roll cleaning tank 46 is fixed to the rod of the lift cylinder 47 and can be lifted and lowered at that position. Accordingly, the cleaning of the rough wiping roll 18 is performed by sliding the rough wiping roll to the upper position of the rough wiping roll cleaning tank, and when the rough wiping roll arrives, the lifting cylinder 47 is driven to lift the rough wiping roll cleaning tank 46. It is supposed to let you.

The plastic carton cleaning apparatus of the present invention is configured as described above and operates as follows.
When the plastic carton is spread out and inserted into the inner surface cleaning roll 1 and the auxiliary roll 7, and the operation is started, the inner surface cleaning roll 1 and the auxiliary roll 7 are moved together by the sliding cylinder 4, and the inner surface cleaning is performed as shown in FIG. When the plastic carton 50 is sandwiched between the roll 1 and the outer surface cleaning roll 2, and the inner surface cleaning roll driving motor, the outer surface cleaning roll driving motor, and the rough wiping roll driving motor are driven, the plastic carton rotates. At that time, by rotating the inner surface cleaning roll and the outer surface cleaning roll with a difference in peripheral speed, a speed difference between the outer peripheral surface of the roll and the plastic carton surface is generated, and the wiping effect is increased. The inner and outer surface cleaning rolls and the rough wiping roll are impregnated with a naturally evaporating alcohol solution, whereby the inner and outer surfaces of the plastic carton are simultaneously wiped off and disinfected. Further, the outer surface is preliminarily cleaned with a rough wiping roll before being cleaned with the outer surface cleaning roll. In this way, by rotating the plastic carton at least once or more, the entire inner and outer surfaces of the body and the flap can be cleaned in one step. When the cleaning for the set time is completed, the sliding cylinder 4 is actuated to return the sliding frame 5 to its original position, and the state shown in FIGS. The inner surface cleaning roll and the auxiliary roll are pulled out by the robot, and the cleaned cartons are stacked at predetermined positions. Therefore, according to this example, the entire inner and outer surfaces of the carton can be wiped off with a volatile cleaning agent of an alcohol preparation, and automatic cleaning can be performed in one step without the need for a drying step, etc. There is no risk of remaining.

  When a plurality of cartons are washed, each roll becomes dirty, and each roll is washed after a predetermined number of washings. When a roll cleaning command is given from the control panel by a push button or the like, the sliding cylinder 4 is activated, and the inner surface cleaning roll 1 moves to the same position as in the carton cleaning and stops. At the same time, the rough wiping roll 18 moves to a position where the rough wiping roll cleaning tank 46 is located. Next, the inner / outer surface cleaning roll cleaning tank 36 moves below the position where the inner / outer surface cleaning roll is located. When the inner / outer surface cleaning roll cleaning tank 36 reaches the position, the inner and outer surface cleaning roll cleaning tank 36 rises until both rolls come into contact with the squeeze roll in the tank. . Thereafter, the cleaning liquid is supplied to the predetermined position in the cleaning tank, and each roll is driven to rotate to start cleaning. Similarly, the rough wiping roll cleaning tank also rises and starts cleaning the rough wiping roll. The roll is washed while the roll is squeezed into a squeeze roll. After a predetermined time has elapsed, the cleaning liquid is discharged from the cleaning tank, and in this state, these rolls are rotated while being pressed against the squeeze roll, and the degree of impregnation of the cleaning liquid of each roll is adjusted, and the cleaning process and cleaning liquid of each cleaning roll are adjusted. The impregnation step is completed. By controlling the impregnation step with a timer, it is possible to always maintain an appropriate squeezed state. Thereafter, the inner and outer surface cleaning roll cleaning tank and the rough wiping roll cleaning tank are returned to their original positions, and the inner surface cleaning roll and the rough wiping roll are returned to their original positions to be used for cleaning the next plastic carton.

It is a schematic diagram which shows the main concepts of the washing | cleaning method of the plastic carton which concerns on embodiment of this invention. It is explanatory drawing which shows the flap incident state of the plastic carton with respect to a rough wiping roll, (a) has the case where there is no protector plate, (b) has shown the case where there is a protector plate. It is one form figure of a plastic carton to which the present invention is applied. It is a top view which shows before the cleaning start of the washing | cleaning apparatus of the plastic carton which concerns on the Example of this invention. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is the right side schematic. FIG. 5 is a view corresponding to FIG. 4 showing a state during plastic carton cleaning. It is the schematic which shows the cleaning state of an inner surface cleaning roll, an outer surface cleaning roll, and a rough wiping roll.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner surface cleaning roll 2 Outer surface cleaning roll 3 Main body frame 4, 20, 38 Sliding cylinder 5, 21, 23 Sliding frame 6 Inner surface cleaning roll drive motor 7 Auxiliary roll 13 Positioning flag 16 Outer surface cleaning roll drive motor 18 Rough wiping roll 22 Rail 24 Slide plate 25 Guide plate 26 Spring 29 Rough wiping roll drive motor 30 Protector plate 36, 46 Cleaning layer 37 Squeeze roll 40 Support plate 43, 47 Lift cylinder 50 Plastic carton 51 Body 52 Flap

Claims (6)

The inner surface cleaning roll and the outer surface cleaning roll with the carton sandwiched between the inner surface cleaning roll impregnated with the cleaning agent and the inner surface cleaning roll impregnated with the cleaning agent. The inner and outer surfaces of the carton are simultaneously cleaned while the carton is endlessly sandwiched and fed between the inner surface cleaning roll and the outer surface cleaning roll, and the upstream side of the outer surface cleaning roll. A carton cleaning method comprising: an outer surface rough wiping step of roughly wiping the outer surface of the carton before the inner and outer surface simultaneous cleaning step with a rough wiping roll disposed on the surface .   The inner surface cleaning roll and the outer surface cleaning roll are rotated with a difference in peripheral speed so that rubbing occurs between the carton inner surface and the inner surface cleaning roll and between the carton outer surface and the outer surface cleaning roll. Carton cleaning method. Cleaning roll cleaning step of impregnating a cleaning liquid to the cleaning roll with cleaning the soiled cleaning roll, according to claim 1 or 2 having a cleaning roll drawing step squeezing excess soaked into the washing liquid in the washing rolls after the cleaning roll cleaning step Carton cleaning method. An inner surface cleaning roll that can be rotationally driven and supported in a cantilevered manner so that the body portion can be inserted into an endless carton, an outer surface cleaning roll that is disposed opposite to the inner surface cleaning roll, and a driving device that rotationally drives the inner surface cleaning roll. A drive device for rotating the outer surface cleaning roll; the inner surface cleaning roller and the outer surface cleaning roller each have a surface layer that can be impregnated with a cleaning agent; and a carton attachment / detachment position, an inner surface cleaning roller, and an outer surface cleaning roller. A carton is disposed so as to be relatively movable to a carton cleaning position where the carton is sandwiched from the inner and outer surfaces and cleaned while being rotated, and the outer surface of the carton is roughly wiped by contacting the outer surface of the carton upstream of the outer surface cleaning roll. A carton cleaning device provided with a wiping roll . The inner surface cleaning roll is provided in a sliding frame that moves in the direction of the outer surface cleaning roll, and an auxiliary roll that is inserted into the carton and assists the rotation of the carton is provided in the sliding frame. The auxiliary roll is slidable integrally, and the rough wiping roll is provided so as to be slidable in a direction perpendicular to the rotation direction of the carton and follows the change in the position of the outer surface of the carton due to the rotation of the carton. And a protector plate for correcting the angle at which a carton flap hits the rough wiping roll is provided close to the rough wiping roll on the slide plate so as to slide. cleaning apparatus of the carton according to claim 4 being. Wherein the device body has a rough wiping roll cleaning tank having an interior surface cleaning roll and the inner and outer surface cleaning roll cleaning tank outer surface cleaning roll has an accommodating opening capable and the crude wipe roll can accommodate opening, the inner and outer cleaning roll cleaning tank slidable and the retracted position and the roll cleaning position, and the said inner surface cleaning roll a roll cleaning position toward the outer surface cleaning roll vertically movably provided, the rough wiping roll cleaning tank Can move up and down with respect to the rough wiping roll when the rough wiping roll is in the rough wiping roll cleaning position, and a squeeze roll is disposed inside the inner and outer surface cleaning roll cleaning tank and the rough wiping roll cleaning tank. carton cleaning apparatus according to claim 4 or 5 are.

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