JP2006289223A - Device for peeling off label of case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely peeling off a label at the side face of a case even if the label is stuck onto any face by effectively acting the spray pressure of liquid. <P>SOLUTION: The case 1 is carried onto an carrying passage TR in a treating part from a carrying-in part IN with its bottom 1A faced upward, then converted to be carried in the diagonal direction from a front-oriented attitude in a stage before reaching a spray region SF, and is diagonally carried by a traction rod 19. The case 1 in a diagonally carrying state is guided with side part restricting plates 22a, 22b and, being pressed by pressing plates 24 from an upper side, is subjected to spray of high pressure liquid toward side faces 1B, 1C of the case 1 from spray nozzles 30 disposed in multiple stages in the vertical direction and in multiple rows in the longitudinal direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a case label peeling apparatus for peeling a label attached to a side surface portion of a box-shaped case such as a synthetic resin made of a cube and containing a predetermined number of desired articles therein. .

For example, when an article such as a beverage container is transported or stored, a predetermined number of containers are accommodated in the case. In this case, for example, for convenience of product management and organization, a label that describes data such as the type and number of containers accommodated in the case, the date of manufacture, the manufacturing factory, and the destination is affixed to the outer surface of the case. . Then, this type of case is recycled after use and filled with articles again. When the case is reused in this way, a new label is attached. For this purpose, the returned case is washed and the label attached thereto is peeled off. Therefore, for example, Patent Document 1 proposes a label peeling device that automatically peels off a label attached to a case so that a high-pressure liquid is jetted from a jet nozzle to the case.
JP 11-197620 A

  The label peeling device disclosed in Patent Document 1 described above is disposed on one side of a case in which a case having a rectangular box shape is installed on the conveying means and is conveyed by the conveying means. The liquid is ejected from the ejection nozzle. That is, in the case shown in Patent Document 1, the case is transported by the transport means by moving the short side straight to the left and right along the conveyor and spraying toward the side of the case transported by the conveyor. High pressure water is jetted from the nozzle. In this case, it is supposed that the spray nozzle can be swung so as to incline about 5 to 45 degrees in order to peel the label more reliably.

  However, the label peeling apparatus of Patent Document 1 described above has various drawbacks. First, the case has a configuration in which the short side of the surrounding wall is arranged on the left and right in the transport direction, the long side is positioned in the front and back in the transport direction, and the liquid is ejected from the side by the spray nozzle. The liquid is ejected from the ejection nozzle only on the side surface on the short side, and high-pressure water cannot be applied to the side surface on the long side. Therefore, in Patent Document 1, the peelable label is at least one of the left and right sides in the conveyance direction by the conveyance means. Even if the injection nozzles are provided on both the left and right sides, The label cannot be peeled by acting. In addition, when high-pressure water is supplied in a direction perpendicular to the case with respect to the spray nozzle, the pressure or flow of the liquid may not act in the direction in which the label peels off due to rebound from the case. The label may not be peeled off. Therefore, the case where the label is not peeled is included in the case where the processing is completed. For this reason, there is also a problem that the case where the label is not peeled must be peeled off again. If the spray nozzle is inclined, the label peeling efficiency is improved. In this case, however, the spray liquid is greatly scattered around, and the surroundings are greatly soiled. Furthermore, when high-pressure water is sprayed onto the case by the spray nozzle, there is no mechanism to hold the case so that the case is not displaced by the reaction force, so that the pressure is attenuated by the movement of the case during the hydraulic action. As a result, a sufficient force in the direction of peeling the label may not be obtained.

  The present invention has been made in view of the above points, and the object of the present invention is to effectively cause the liquid jet pressure to act on any side of the case on which side the label is attached. It is to ensure that the label can be peeled off.

  In order to achieve the above-described object, the present invention has a rectangular bottom surface portion and side surface portions provided on four surfaces around the bottom surface portion, and any side surface portion of a box-shaped case having an open top. An apparatus for peeling off a label attached to a case, wherein the case is transported in a diagonal direction with its bottom surface facing upward, and a transport direction of the case by the transport means A posture holding means for restricting movement other than that and a label disposed toward the side of the case while the case is being transported to the case transport path by the oblique transport means. It is characterized by comprising a jetting means for jetting a high-pressure liquid for peeling.

  Here, the box-shaped case has a cubic shape and includes a rectangular parallelepiped. The material of the case is generally made of synthetic resin, but is not limited to this, and any material such as metal or wood may be used. Further, the label may be attached to any surface as long as it is a side surface outside the case.

  In order to convey the case in the diagonal direction, for example, a structure including traction means for pulling the inner corners of the case is provided, and the traction means can be configured to move along the case conveyance path. As a result, the case is transported in the diagonal direction. In this case, the case conveyance path can be provided with conveyance means for driving the case in synchronization with the traction means, such as a conveyance chain or a conveyance belt, and a guide plate for guiding the case, a roller way, etc. Can also be provided.

  The case is transported by the transport means, but the loader unit and the unloader unit that are carried into and out of the label peeling stage are generally directed straight in the carrying direction. Further, label peeling may be performed by a single stage configuration, but other processing stages, for example, a case cleaning stage and a label peeling stage can be combined.

  For convenience of processing, the case is transported diagonally from the state where the case is transported straight before being carried into the label peeling stage, and the case is transported obliquely when it is unloaded from the label peeling stage (hereinafter referred to as “the case”). , Referred to as oblique transport) to a state of transporting straightly (hereinafter referred to as forward transport). As described above, in order to change the conveyance direction, the side regulating member for changing the direction in the oblique direction is provided on either the left or right side of the case. Then, on the carry-in side to the label peeling stage, in order to make the inclination direction always constant, after turning around one corner of the case, it is guided by the side regulating member. On the other hand, in order to change the direction of the case from the oblique direction to the straight direction, the case can be constituted by only the regulating member.

  The injection means can be composed of one or a plurality of injection nozzles arranged on the left and right sides of the case conveyance path. The spray nozzle is configured to spray a liquid such as water at a high pressure toward the entire height of the case. The liquid is sprayed over the entire height of the case. If it is going to cover the full length of a case with one jet nozzle each, the pressure at the time of colliding with a case may vary with a position. Therefore, in order to supply liquid with an equal pressure, it is desirable to provide a plurality of injection nozzles at least in the height direction. Further, a plurality of rows of spray nozzles can be arranged in the case conveyance direction. Each spray nozzle may spray liquid in a direction perpendicular to the traveling direction of the case, but in the traveling direction of the case, the spray nozzle disposed on the upstream side is in front of the traveling direction of the case. The spray nozzles disposed on the downstream side and the downstream side may have a predetermined angle toward the rear in the traveling direction of the case. In addition, the spray nozzles at each stage can be inclined slightly downward.

  Thus, the label is peeled off at the pressure by spraying the high-pressure spray from the spray nozzle onto the side surface of the case. For this reason, the injection pressure acts on the case, but since the injection is performed from both the left and right sides in the conveyance path, the injection pressure from one side is offset by the injection pressure from the other side. The force in the pushing direction hardly acts. In order to hold the case more stably during the label peeling operation, the posture holding means is provided. This posture holding means can be configured by disposing a side regulating member in the vicinity of the contact portion of the case with the conveyance surface in order to prevent the case from swinging in the left-right direction. However, the position of the side regulating member is limited to the vicinity of the conveyance surface in the case conveyance path so as not to reach the portion where the label may be attached. In addition, the case is stably held so as not to float or bounce. For this purpose, the case is conveyed while being pressed from above by a pressing member. The pressing member can be configured by a belt or the like, and can be moved in the conveying direction. However, the pressing member is configured by a pressing plate fixed in the conveying direction, and the bottom surface of the case is faced downward by biasing means such as a spring. To make the part press.

  By comprising as mentioned above, the label affixed on the side surface of the case can be peeled smoothly and reliably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows the configuration of case 1 processed by the label peeling apparatus. The case 1 is formed by connecting long side surfaces 1B and 1B and short side surfaces 1C and 1C around the bottom surface 1A, and an upper end thereof is open. A label 2 is attached to the outer surface of the side surface of the case 1. In the illustrated example, the label 2 is affixed to the long side surface 1B and the short side surface 1C, but the label 2 is affixed to one or more sides. Yes. Therefore, the label peeling apparatus 10 peels the label 2 from the case 1.

  The label peeling apparatus 10 is roughly constituted by a liquid ejecting means and a case 1 conveying means. As shown in FIG. 2, while the case 1 is transported along the in-treatment transport path TR constituting the label peeling stage, the label 2 affixed to the case 1 is caused by the action of the liquid ejecting means. It is peeled off. A carry-in part IN that functions as a loader part is provided on the upstream side of the processing-part conveyance path TR, and the case 1 to which the label 2 is attached is carried from the carry-in part IN. Then, the case 1 from which the label 2 has been peeled off while being transported along the transport path TR in the processing section is unloaded from the unloading section EX functioning as an unloader section, and is loaded into the next process, for example, a cleaning process. In the transport path of the case 1, the case 1 is transported with its bottom surface portion 1 </ b> A facing up, that is, with the case 1 turned down. Here, in the carry-in part IN and the carry-out part EX, the conveyance direction of the case 1 is straight with the long side surface part 1B facing the conveyance direction, that is, forward conveyance is performed. For this purpose, a carry-in side conveyance means 10 and a carry-out side conveyance means 11 each comprising a conveyance belt, a roll conveyance and the like are provided, and the case 1 is facing forward on both the left and right sides of these conveyance means 10 and 11. Straight guide plates 12 and 13 are provided for guiding so as to go straight.

  As described above, in the carry-in portion IN and the carry-out portion EX, the case 1 is conveyed straight forward with the long side surface portion 1B (or the short side surface portion 1C) in the conveyance direction, and the conveyance path TR in the processing unit. Then, the case 1 is conveyed obliquely in the diagonal direction. In order to obliquely convey the case 1 through the in-processing-unit conveyance path TR, an oblique conveyance means for the case 1 is provided. In this oblique conveying means, a chain 18 is wound around the sprockets 16 and 17 attached to the rotary shafts 14 and 15 provided at the starting end and the terminal end of the processing-unit transfer path TR. Any one of 15, for example, the rotary shaft 15 located on the carry-out part EX side is driven to rotate by a motor (not shown). A traction rod 19 is attached to the traction chain 18 with a predetermined pitch interval. The pitch interval of the traction rods 19 is equal to or longer than the diagonal length of the case 1, and the case 1 is conveyed one by one by rotating the rotary shaft 15 thereby. Further, sprockets 20 a and 20 b are mounted on the rotary shafts 14 and 15, and a transport chain 20 is wound between the sprockets 20 a and 20 b, and the transport chain 20 contacts the case 1. ing. Further, one or a plurality of guide members 21 are provided in parallel with the pulling chain 18 and the transport chain 20. As described above, the driving means including the pulling chain 18 provided with the pulling rod 19 and the transport chain 20 and the guide member 21 constitute an oblique transport means for transporting the case 1.

  FIG. 3 shows the movement trajectory of the case 1 in the transport path of the case 1 in the processing unit transport path TR. As is clear from this figure, in the carry-in section IN, the direction is changed so that the case 1 is transported obliquely when the case 1 is transferred from the state in which the case 1 is transported forward to the transport path TR in the processing section. In order to change the direction, direction change side restricting plates 22a and 22b are provided on both the left and right sides of the case 1 at the transition portion from the carry-in portion IN to the in-treatment portion transport path TR. The side restricting plates 22a and 22b are separated from the rectilinear guide plate 12 on the carry-in portion IN side by a predetermined distance. In addition, the start end portion of the oblique transport means including the pulling chain 18 and the transport chain 20 overlaps with the front end portion of the transport section of the carry-in side transport means 10. Of the left and right side restricting plates 22a and 22b, one side restricting plate 22a is not in a direction parallel to the conveying path, and up to a predetermined position as indicated by reference numeral 22aT1 in FIG. It is arrange | positioned diagonally so that it may face.

  The tow rod 19 provided on the tow chain 18 gets into the inside of the case 1 which is raised and turned down by the rotation of the sprocket 16, and when the tow chain 18 advances, the tow rod 19 moves to the case 1. It is designed to push the inner surface. When the case 1 is pushed by the tow rod 19, the case 1 turns and the tow rod 19 comes into contact with the corner of the inner surface of the case 1, and the case 1 is pulled by being pulled in this state. It becomes an oblique conveyance state. Moreover, in order to control the case 1 to turn in the direction indicated by the arrow P in FIG. 3 during this direction change, as shown in FIG. 4, the position inside the side portion restricting plate 22a is A leaf spring 23 for turning is provided to press the upper portion of the case 1, that is, the bottom portion 1A. Since the case 1 is pushed forward by the traction rod 19 while being pressed by the turning plate spring 23, the case 1 is reliably turned in the direction of the arrow P. When the pulling rod 19 is positioned at the corner of the inner surface of the case 1, the pulling rod 19 does not turn any further, and the case 1 starts moving in the diagonal direction. Therefore, at this time, it is detached from the turning leaf spring 23.

  As described above, the case 1 is stably and obliquely conveyed by the action of the traction rod 19 in the in-processing-unit conveyance path TR, and reaches the injection region SF (FIG. 2) in which the injection means is disposed, and one of the outer sides thereof. The label 2 attached to the side surface is peeled off. Before entering the injection area SF, the case 1 stably holds a position other than the traveling direction, and swings in the left-right direction, rises up from the transport surface, or causes vibrations, bounces, etc. in the up-down direction. Do not.

  The lateral deflection and vibration of the case 1 in the injection region SF are suppressed by the side regulating plates 22a and 22b. Accordingly, the distance between the side regulating plates 22a and 22b is set to be slightly wider than the diagonal of the case 1 at least in the injection region SF. As a result, the corner of the case 1 is engaged with the pulling rod 19 and the other two corners are regulated by the side regulating plates 22a and 22b. Can be regulated. And the side part control plates 22a and 22b face the lower end part of the case 1 and a slight height in the vicinity thereof, and most parts on the side face of the case 1 are open.

  Further, in order to suppress the movement of the case 1 in the vertical direction, as shown in FIGS. 5 and 6, a presser plate 24 is provided in the injection region SF. The presser plate 24 is provided with a plurality of support rods 26 on the mounting member 25 so that the position of the support rods 26 can be adjusted in the vertical direction, and is connected to the lower part of the support rods 26. A stopper member 27 is attached to the support rod 26, and the presser plate 24 is held at a predetermined height position by the stopper member 27. In this state, the presser plate 24 is held at a height position lower than the bottom surface portion 1 </ b> A that is the upper surface of the case 1 that is transported along the transport surface L of the processing unit transport path TR. A spring 28 as an urging means is interposed between the attachment member 25 and the presser plate 24. When the case 1 pulled by the traction rod 19 advances to the injection region SF, the spring 28 is attached. The presser plate 24 is pushed up against the force. For this purpose, the presser plate 24 is provided with a calling portion 24a. As a result, the case 1 is pressed against the conveyance path by the urging force of the spring 28 to prevent the vertical swing or the like from occurring. Here, if the case 1 is pressed too strongly, the movement in the conveyance direction is hindered. Therefore, in order to smoothly convey the case 1 while restricting the movement in the vertical direction, the pressing force by the spring 28 is compared. Weak.

  As described above, the side portion restricting plates 22a and 22b and the holding plate 24 constitute the posture holding means of the case 1, and the posture holding means regulates the movement of the case 1 and stably conveys it to the injection region SF. However, in this injection region SF, a plurality of injection nozzles 30 as the injection means are disposed on the left and right sides in the conveyance direction of the case 1. As shown in FIGS. 7 and 8, the injection nozzles 30 are provided in a plurality of stages in the vertical direction and in a plurality of rows in the front-rear direction. The number of stages and the number of rows of injection nozzles may be set as desired, but in the present embodiment, four rows and two rows on each of the left and right sides, a total of eight injection nozzles 30 are arranged in an oblique direction for each row. . Each of these spray nozzles 30 may spray the liquid in a direction orthogonal to the conveyance path of the case 1, but sprays at a predetermined angle from obliquely above. Further, among the spray nozzles 30 in each row, as is apparent from FIG. 7, the spray nozzles 30 in the row in the transport direction indicated by the arrows are directed forward in the transport direction of the case 1 and in the rear rows. The spray nozzles 30 are each inclined at a predetermined angle toward the rear in the transport direction of the case 1. However, since the case 1 is transported in the diagonal direction, even if the liquid is ejected from the ejection nozzle 30 in a direction orthogonal to the transport direction, the case 1 is directed diagonally forward or rearward with respect to the outer surface of the case 1. Therefore, it is not always necessary to tilt the injection nozzle 30, and even if it is tilted, it is not necessary to tilt the spray nozzle 30 so much.

  In this way, the liquid 2 is ejected from the ejection nozzle 30 toward the long side and short side surfaces 1B and 1C of the case 1 at a high pressure, so that the label 2 is attached to any of the side surfaces. The label 2 is surely peeled off by the action of the high-pressure jet liquid. That is, since the high-pressure spray injected toward the side surface of the case 1 collides with any side surface in an oblique direction, the high-pressure spray rebounds from the side surface of the case 1. Instead, a high-speed flow along the side surface is formed. Therefore, the high-pressure jet liquid not only has an impact on the label 2, but also forms a high-speed flow that tends to lift the label 2 from the side surface of the case 1. The label 2 can be peeled off.

  And the high-pressure jet liquid from the injection nozzle 30 which impacts the side part of the case 1 in this way and forms a high-speed flow along the side part is the four side parts 1B, In this case 1, the injection region SF can be determined regardless of which side surface portion the label 2 is affixed to, or all the side surface portions. While passing, it can be reliably peeled off. In addition, since an equal amount of high-pressure liquid is ejected from the left and right ejection nozzles 30, a substantially uniform ejection pressure acts on the case 1 from both sides. Accordingly, the case 1 can be stably held at the time of liquid ejection, and the pressure of the liquid acts to the maximum in the direction in which the label 2 is peeled off.

  After the case 1 passes through the injection region SF in which the injection nozzle 30 is disposed, the case 1 goes to the transition portion to the carry-out portion EX. And in the transition part to this carry-out part EX, the case 1 is turned from the oblique conveyance state to the forward conveyance state. Therefore, the position of the side regulating plate 22b immediately after passing through the injection region SF is inclined toward the conveyance path as indicated by reference numeral 22bT2 in FIG. On the other hand, in this portion, the side regulating plate 22a is removed. Therefore, the case 1 moves while rotating in this direction in the direction of the arrow Q. Further, the side regulating plate 22b in an inclined state is a part after the linearly proceeding state so as to be continuous with the rectilinear guide plate 13, and the other side regulating plate 22a is denoted by reference numeral 22aT3 in FIG. It arrange | positions so that it may incline in the direction, and, thereby, direction of the case 1 is changed so that the long side surface part 1B may face the conveyance direction. And if it transfers to the carrying-out part EX from the conveyance path TR in a process part, it will be in a forward conveyance state and will be carried in to the next process.

It is an external appearance perspective view which shows an example of the case where label peeling is performed by the label peeling apparatus of this invention. It is composition explanatory drawing of the label peeling apparatus which shows one Embodiment of this invention. It is explanatory drawing which shows the conveyance state of case 1 in the conveyance path in a process part. It is sectional drawing which shows the structure of the conversion means in the conveyance direction of a case. It is sectional drawing which shows the structure of the attitude | position holding means of a case. It is XX sectional drawing of FIG. 5 which shows the state holding the attitude | position of a case. It is a principal part top view which shows the structure of an injection area | region. FIG. 8 is a front view of FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1A Bottom face part 1B Long side surface part 1C Short side surface part 14, 15 Rotating shaft 16, 17 Sprocket 18 Tow chain 19 Tow rod 20 Transport chain 21 Guide member 22a, 22b Side part restricting plate 23 Turning plate Spring 24 Presser plate 30 Injection nozzle IN Carry-in part EX Carry-out part TR Transport path in process part SF Injection area

Claims (6)

In an apparatus for peeling a label affixed to any side part of a box-shaped case having a rectangular bottom face part and four side faces provided around the bottom face part and having an open top ,
Oblique transport means for transporting the case in the diagonal direction with its bottom surface portion facing upward;
Posture holding means for restricting movement of the case other than the conveying direction by the conveying means;
An ejection unit that is disposed on both right and left sides of the conveyance unit and that injects a high-pressure liquid for label peeling toward a side surface of the case while the case is conveyed to the case conveyance path by the oblique conveyance unit; A label peeling device for a case, characterized by comprising Before and after the oblique conveying means, a carrying-in conveying means and a carrying-out conveying means are provided, and these carrying-in and carrying-out conveying means convey the case straightly, and each carrying on the carrying-in side and carrying-out side is carried out. 2. The label peeling apparatus for a case according to claim 1, wherein a conversion means for changing the conveyance direction of the case is provided between the means and the oblique conveyance means. 3. The case according to claim 1, wherein the oblique conveying means is constituted by a pulling means for pulling a corner portion on the inner surface side of the case, and a transfer member provided in parallel with the pulling means. Label peeling device. The posture holding means is provided at a side portion restricting member that guides a lower position in the vicinity of the case conveying path, and an upper position of the conveying path by the conveying means, and a pressing plate that presses the bottom surface portion of the case by the urging means The case label peeling apparatus according to claim 1, comprising: 2. The case according to claim 1, wherein the spraying means is configured to dispose a plurality of spray nozzle groups in a plurality of stages in the vertical direction on both left and right sides of the case conveyance path, and to provide a plurality of rows of the spray nozzle groups. Label peeling device. Of the plurality of rows of spray nozzles, one or a plurality of rows of spray nozzles positioned on the front side in the transport direction of the case is directed toward the front in the transport direction of the case, and one or a plurality of rows of spray nozzles positioned on the rear side. 6. The case label peeling apparatus according to claim 5, wherein the nozzle is inclined at a predetermined angle toward the rear in the carrying direction of the case.

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