JP2010070193A - Labeler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a labeler capable of easily peeling a label 12 affixed to a container 18. <P>SOLUTION: A plurality of holding units 12 each for sucking and holding a label 2A are provided on an outer peripheral surface of a transfer drum 10 to be rotated by a rotating means. The label 2A held by the holding units 12 and rotated and transferred is coated with a glue from a glue coating means 14, and the label 2A is affixed to the container 18. Six dispensing ports 60a1, 60a2, 60a3, 60a4, 60a5 and 60a6 are provided in the vertical direction on a hot melt coating head 60 of the glue coating means 14, and the feed of the glue is controlled by a set of two dispensing ports. When coating the glue on a rear end part 2Ab side of the label 2A, the dispensing of the glue is started by the two upper dispensing ports 60a1 and 60a2 at a slightly early timing compared with other dispensing ports, and ended earlier. A part 2Ad which is not coated with the glue is formed between a part 72a with the glue being coated and a rear end edge 2Ac of the label 2A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a labeler for attaching a label to an outer peripheral surface of a container, and more particularly to a labeler having a configuration in which glue is applied to a front end portion and a rear end portion of a label and wound around and attached to the periphery of the container. .

  2. Description of the Related Art A labeler having a configuration in which when a film label is affixed to a container such as a PET bottle, a paste is applied to the front end portion and the rear end portion of the label and wound around and adhered to the periphery of the container has been widely known. Moreover, in order to recycle the container to which such a label is attached, various labelers that have been devised to make it easier to remove the label from the container have been proposed (for example, see Patent Document 1 or Patent Document 2).

In the configuration of the invention described in Patent Document 1, a portion without an adhesive layer is formed at the end of the label, and the shape of the portion without the adhesive layer is crossed across the end of the label in the width direction. Disclosed are those in which a pressure-sensitive adhesive is not applied over the entire width of the label, and those formed in a triangular or circular shape at the end portion or the central portion in the width direction of the label. Further, Patent Document 2 has a first strong adhesion region and a first weak adhesion or non-adhesion region at the front end of the back surface of the label, and a second strong adhesion at the rear end of the label. A configuration having a region and a second weakly bonded or non-bonded region is described.
Japanese Patent Laying-Open No. 2003-29640 (page 2-3, FIG. 3) Japanese Patent No. 4017153 (page 4-5, FIG. 7)

  In each of the above-mentioned patent documents, in order to make it easy to peel off the label affixed to the peripheral surface of the container, a “part without an adhesive layer” or a “weakly bonded or non-adhesive region” is formed at the end of the label. However, there is no description about what apparatus is used for which process to form.

  The present invention has been made to solve such problems, and in order to secure a clue (peeling opening) when peeling off a label that is wound around and adhered to a container, a paste is applied to the label. The object of the present invention is to provide a labeler whose position to be adjusted is adjustable.

  The present invention provides a transfer drum for holding a label, a rotating means for rotating the transfer drum, a glue applying means for applying glue to the front end portion and the rear end portion of the label held on the transfer drum, and the glue applying method. Control means for controlling the cloth means, and the glue applying means has a plurality of outlets for discharging glue in the vertical direction, and each of these outlets can be controlled independently or as a set. The timing at which glue is discharged from at least one or one set of discharge ports is earlier than the other discharge ports in the case of the rear end portion of the label, and is delayed in the case of the front end portion, The distance from the label edge of the glue application portion discharged from this discharge port and applied to the label is longer than the distance from the label edge of the glue application portion by the other discharge ports, and the front end portion of the label Small rear end And also characterized in applying the other.

  According to the second aspect of the present invention, the transfer drum for holding the label, the rotating means for rotating the transfer drum, and the paste are applied to the front end portion and the rear end portion of the label held on the transfer drum. A glue application means and a control means for controlling the glue application means, wherein the glue application means has a plurality of discharge ports for discharging glue in the vertical direction, and one or a plurality of these discharge ports as a set; It is configured so that the ejection can be controlled independently, and when applying glue to the rear end of the label, the ejection end time of glue from at least one or one set of ejection ports is set to the ejection from other ejection ports. When applying the glue to the front end of the label earlier than the end time, the glue discharge start time from at least one or one set of discharge ports is later than the discharge start time from other discharge ports. This discharge by The distance from the label edge of the glue application part that is discharged from the label and applied to the label is longer than the distance from the label edge of the glue application part by the other outlets, so that the front and rear ends of the label At least one of the above is applied.

  The labeler of the present invention is provided with a plurality of discharge ports for discharging glue in the vertical direction, and the discharge ports are configured as one or a plurality of sets so that glue can be discharged independently. By shifting the discharge timing of glue from one or a set from the other discharge ports, or by changing the discharge time, the distance from the edge of the label where the glue is applied can be changed from the other discharge ports. Since it is longer than the paste application part, a clue when peeling the label can be formed, and the label can be easily peeled off from the container.

  A transfer drum for holding a label; a rotating means for rotating the transfer drum; a glue applying means for discharging and applying glue to a label held on the transfer drum; and a control means for controlling the operation of the applying means. The glue applying means is provided with a plurality of discharge ports for discharging glue in the vertical direction. The plurality of discharge ports are configured so that the glue can be discharged independently, one by one, or one by one, and the front end of the label that is held by the transfer drum and rotated and conveyed Glue is discharged and applied from the discharge port of the glue application means to the head and rear end, but when applying glue to the rear end, glue from any one or one set of discharge ports The discharge timing is set earlier than the other discharge ports, and the paste application portion is formed by shifting from the other discharge ports toward the tip of the label with respect to the paste application portion applied to the label. In addition, when discharging glue to the front end, the discharge timing of glue from any one or one set of discharge ports is set later than the other discharge ports. The distance from the rear edge or front edge of the label is longer than the distance from the label rear edge or front edge of the glue application part applied by discharging from other outlets. Since the portion to which the glue is not applied is wide, it serves as a clue when the label is peeled off from the container, and the object of enabling the label to be easily peeled off from the container is achieved.

  Further, in a labeler having the same configuration, when applying glue to the rear end portion of the label, the discharge end time of glue from at least one or one set of discharge ports is set as the discharge end time from other discharge ports. The discharge time is shortened by making it faster, or when applying the glue to the front end of the label, the discharge start time of the glue from at least one or one set of discharge ports is set from the other discharge ports. The discharge time is shortened by delaying the discharge start time. Even in such a control, by shortening the discharge time from the discharge port, the distance from the rear edge or front edge of the label of the paste application portion of the formed label is discharged from the other discharge ports and applied. The glue-applied part is longer than the distance from the rear edge or the front edge of the label, and the part where the glue is not applied is wide, so it is a clue when removing the label from the container, and the label is easily removed from the container. Achieve the goal of being able to

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a plan view schematically showing the entire structure of a labeler according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing a label transfer drum and glue applying means provided on the labeler, and FIG. FIG. 4 is a perspective view of a hot melt coating head provided in the glue applying means. FIG. 4 is a plan view showing a state in which the main parts of the label transfer drum and the glue applying means are in operation.

  The overall configuration of the labeler will be briefly described with reference to FIG. A strip-shaped label 2 having a predetermined width is wound in a roll shape and supported by a roll stand (not shown). The strip-shaped label 2 is pulled out and sent to a cutter 6 through a plurality of rollers 4. A label 2A (see FIG. 3) cut to a predetermined length by a cutter 6 including a pair of rotating bodies 6A and 6B is delivered to a label transfer drum 10 via a delivery drum 8. The label transfer drum 10 is provided with a plurality of (four locations in this embodiment) label holding portions 12 at equal intervals in the circumferential direction on the outer peripheral surface, and each label holding portion 12 holds a label 2A one by one. Hold and rotate and transport. A glue applying means 14 is installed outside the label transport path on the downstream side of the label transfer position A from the transfer drum 8 of the label transfer drum 10. The glue discharged from the glue applying means 14 is applied to the back side of the label 2A held by the label holding part 12 of the label transfer drum 10. The label 2A to which the glue is applied is attached to the outer peripheral surface of the container 18 that has been conveyed by the container conveying device 16 at the label attaching position B.

  On the other hand, the container 18 to which the label 2 </ b> A is affixed is conveyed by the supply conveyor 20, separated at a predetermined interval by the infeed screw 22, and delivered to the inlet star wheel 24. The inlet star wheel 24 rotates and conveys the received container 18 and supplies the container 18 to the rotary container conveying device 16. The rotating body 26 of the container transport device 16 is provided with a large number of container bases 26a on the outer periphery thereof at equal intervals in the circumferential direction, and the container 18 placed on the container base 26a is provided by a container holding means (not shown). It is held and rotated and conveyed. The container transport device 16 is operated in synchronization with the label transfer drum 10, and each container 18 being transported receives the label 2 </ b> A held on each label holding portion 12 of the transfer drum 10 at the label attaching position B. It is pasted. The container 18 with the label 2A attached is rotated and conveyed by the container conveying device 16, delivered to the outlet star wheel 28, discharged onto the discharge conveyor 30, and sent to the next step.

  Next, the configuration of the label transfer drum 10 and the glue applying means 14 for applying glue to the label 2A held on the label transfer drum 10 will be described. The label transfer drum 10 is rotatably installed on the base plate 32. A support cylinder 34 is fixed through the base plate 32 in the vertical direction, and an upright rotating shaft 40 is rotatably supported via upper and lower ball bearings 36 and 38 held in the support cylinder 34. A cylindrical member 42 is fitted to the upper outer peripheral surface of the rotating shaft 40 extending above the support cylinder 34. The cylindrical member 42 is connected to the outer surface of the rotating shaft 40 by connecting means such as a key, and rotates integrally with the rotating shaft 40 and can be moved up and down relatively to adjust the height. Yes. Further, a cylindrical cover 44 is fixed to the outer periphery of the cylindrical member 42 and rotates integrally with the rotary shaft 40 and the cylindrical member 42.

  A circular plate 46 (hereinafter referred to as a fixed plate) that is horizontally fixed via a support column (not shown) is disposed at substantially the same height as the lower end portion of the cylindrical member 42. A ball bearing 48 is disposed between the outer periphery of the lower end of the cylindrical member 42 and the inner peripheral surface of the fixed plate 46, and supports the rotation of the cylindrical member 42 that rotates together with the rotary shaft 40. An annular sliding member 50 is fixed to the outer peripheral portion of the upper surface of the fixed plate 46. The fixed plate 46 and the sliding member 50 are formed with a fixed-side vacuum passage which will be described later.

  A flange 44a is formed at the lower end of the cylindrical cover 44 fixed to the upper outer periphery of the rotating shaft 40, and a circular rotating plate 52 is fixed to the lower surface of the flange 44a. The rotating plate 52 slides on the upper surface of the annular sliding member 50 when rotating. A label transfer drum 10 that holds and rotates the label 2A is attached to the outer peripheral portion of the rotary plate 52. When the rotary plate 52 is rotated by the rotation of the rotary shaft 40, the label transfer drum 10 is moved to the rotary plate 52. And rotate together. The rotating shaft 40 is connected to rotating means (not shown) below the base plate 32 and is driven to rotate.

  The label transfer drum 10 has an annular bottom surface 10a and a cylindrical wall surface (cylindrical portion) 10b raised on the outer periphery of the bottom surface 10a. A plurality of label holding portions 12 are formed on the outer surface of the cylindrical portion 10 b of the label transfer drum 10. In this embodiment, four label holding portions 12 are formed on the outer peripheral surface of the cylindrical portion 10b at equal intervals in the circumferential direction (see FIG. 1). Each label holding unit 12 sucks and holds two places in the front and rear directions in the conveyance direction of the label 2A, and has two protruding portions 12a and 12b, respectively. The protrusion 12a shown on the left side of the transfer drum 10 in FIG. 3 is a protrusion on the front side in the rotational direction of the drum 10 of the one holding part 12 that holds the single label 2A by suction. The protrusion 12b shown is a protrusion on the rear side of the holding part 12 in the drum rotation direction. Note that FIG. 3 shows a protruding portion 12b on the rear side of one label holding portion 12 and a protruding portion 12a on the front side of another label holding portion 12 positioned on the rear side in the rotational direction.

  The front side protruding portion 12a of the label holding portion 12 has a substantially trapezoidal shape when viewed from above. That is, the length of the upper surface side of the portion protruding from the outer peripheral surface of the label transfer drum 10 is shorter than the bottom surface side (the outer peripheral surface side of the transfer drum 10), and both side surfaces connecting the bottom surface and the upper surface are inclined surfaces. It has become. The top surface has an arc shape concentric with the bottom arc (which coincides with the outer peripheral surface of the label transfer drum 10). On the other hand, the rear-side protruding portion 12b has a top surface shorter than the bottom surface, and the side surface on the front side in the rotational direction is inclined, but the rear side surface is substantially linear. The bottom surface and the top surface of the projecting portion 12b have an arc shape similar to that of the projecting portion 12a on the front side. These front and rear protrusions 12a and 12b are each made of an elastic body such as rubber, and are recessed when pressurized from the upper surface side.

  An arc-shaped groove 46a is formed in a portion of the upper surface of the fixed plate 46 where the sliding member 50 is fixed, and vacuum is introduced through a pipe 54 connected to the lower surface side. . In the annular sliding member 50 fixed on the fixed plate 46 so as to cover the arc-shaped groove 46 a, a range in which the hole 50 a penetrating vertically overlaps the arc-shaped groove 46 a of the fixed plate 46. Are formed in large numbers. The arc-shaped groove 46a and the through hole 50a are labels held by the label holding unit 12 from a position slightly upstream of the delivery position A (see FIG. 1) where the label transfer drum 10 receives the label 2A from the delivery drum 8. 2A is formed over the pasting position B where the container 18 is pasted.

  On the other hand, the front and rear protrusions 12a and 12b of the label holding part 12 have a plurality of suction ports 12c (three in the protrusions 12a and 12b and six in the horizontal direction in this embodiment) that open to the outer surface. Is formed. These suction ports 12c are formed in a longitudinal passage 10c formed in the cylindrical portion 10b of the label transfer drum 10, a radial passage 10d formed in the bottom 10a, and a passage 52a in the rotary plate 52 connected to the passage 10d. Or the like, and is connected to a vacuum inlet 52b that opens to the lower surface of the rotary plate 52. As shown in FIG. 3, the suction port 12 c on the front side of the front protrusion 12 a is formed across the upper surface and the front inclined surface. When the label transfer drum 10 rotates along with the rotation of the rotating shaft 40, a vacuum introducing port 52 b of the rotating plate 52 communicating with the suction port 12 c of each label holding unit 12 is formed in the fixed sliding member 50. In the portion overlapping with the through hole 50a, the vacuum acts on the suction port 12c and the label 2A can be adsorbed. Further, when the vacuum introduction port 52b rotates and reaches the label attaching position B, the vacuum is disconnected from the through hole 50a of the sliding member 50 and the arc-shaped groove 46a of the fixing plate 46, and the vacuum is cut off and held. The label 2A is released. In this embodiment, immediately after the vacuum of the suction port 12c of the label holding unit 12 is shut off, air is blown out from the suction port 12c for a short time so that the label 2A is reliably delivered to the container 18. Yes.

  On the outer side of the cylindrical portion 10 b of the label transfer drum 10, glue applying means 14 is provided so as to face the label transfer drum 10. The glue applying means 14 is affixed with a label for attaching the label 2A to the container 18 from the label holding portion 12 of the label transfer drum 10 on the downstream side of the label transfer position A from the transfer drum 8 to the label transfer drum 10. It is arranged upstream of the position B. The glue applying means 14 is mounted on a mounting base 56 via an air cylinder 58 and can be moved forward and backward in the direction of the label transfer drum 10 by the operation of the air cylinder 58.

  The glue applying means 14 includes a hot melt coating head 60 in which a plurality of discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 for discharging glue (hot melt) are formed on the side facing the transfer drum 10. (See FIG. 4). In this embodiment, six discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 are provided in a vertical direction and aligned in a straight line, and the discharge port located at the lowermost position from the upper end of the uppermost discharge port 60a1. The vertical length to the lower end of 60a6 is slightly shorter than the width of the label 2A (the vertical length when the label is held by the label holding portion 12 of the label transfer drum 10). These discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 are glue storage portions provided in the main body portion of the paste applying means 14 via a passage 60b (see FIG. 3) inside the hot melt coating head 60. 14a. Further, the glue storage section 14a is connected to glue supply means 64 (consisting of a glue storage tank and a pump) controlled by a control device 62 (see FIG. 5 described later) (see FIG. 2). .

  FIG. 5 is a diagram showing an example of a circuit for supplying glue to the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 of the hot melt coating head 60. In this embodiment, there are six discharge ports 60a1 and 60a2. , 60a3, 60a4, 60a5, 60a6, each having a set of two, one supply passage 66a, 66b, one for each discharge port (60a1 and 60a2, 60a3 and 60a4, 60a5 and 60a6), The glue is supplied from 66c. The three supply passages 66a, 66b, 66c are connected to the pump 68 of the glue supply means 64, and by the operation of the supply pump 68, each set of discharge ports (60a1) from a storage tank (not shown). 60a2, 60a3 and 60a4, 60a5 and 60a6). The supply passages 66a, 66b, and 66c are provided with solenoid valves 68a, 68b, and 68c, respectively, and the control device 62 controls the timing of discharging glue, the discharge time, and the like. In this embodiment, the paste discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 are each composed of six openings arranged in a straight line in the vertical direction, but the number of the discharge ports 60a is six. The number is not limited to the number, and other numbers may be used. In addition, the present invention is not limited to the configuration in which the adhesive is supplied with two discharge ports as a set, and other configurations such as controlling one by one independently, or controlling by setting three by three. Also good. Further, when the label 2A is changed and the length, width, or position of the portion to which the paste is applied is changed, the label 2A is replaced with a hot melt coating head 60 having a discharge port of a corresponding shape.

  As shown in FIGS. 3 and 4, the hot melt coating head 60 has a narrow flat surface 60c that is closest to the label transfer drum 10 side. Discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 are formed. One side 60d (the label 2A held by the label holding part 12 of the label transfer drum 10 approaches the front side in the rotation direction of the flat surface 60c on which the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 are formed. The side portion of the incoming side is an arc-shaped surface that is continuous with the flat surface 60c. Further, the other side portion corresponding to the rear side in the rotation direction is formed by two inclined surfaces 60e and 60f that are retreated in a direction away from the outer surface of the transfer drum 10. In particular, the inclination angle of the inclined surface 60e that continues from the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 is abruptly prevented from adhering to this portion. As shown in FIG. 3, the arc-shaped side portion 60d of the hot melt coating head 60 can contact the label 2A in the vicinity of the connection portion with the flat surface 60c, but the opposite side portions 60e and 60f are labeled 2A. There is no contact at all.

  The operation of the labeler according to the above configuration will be described. A long label 2 fed out from a roll label held on a label stand (not shown) is sent to a cutter 6 having a pair of rotating bodies 6A and 6B via a plurality of rollers 4 and is supplied to a container 18. It is cut into a predetermined length according to the size. The cut label 2A is delivered to the label transfer drum 10 via the delivery drum 8. The label transfer drum 10 is provided with four label holding portions 12 including a pair of protrusions 12a and 12b provided at the front and rear in the rotation direction at equal intervals, and the leading end side of the cut label 2A is rotated. In the state of being placed on the protruding portion 12a on the front side in the direction, it is adsorbed by the vacuum acting on the suction port 12c, while the rear end side of the label 2A is sucked in the state of being placed on the protruding portion 12b on the rear side in the rotational direction It is adsorbed by a vacuum acting on the mouth 12c. An intermediate portion other than the front end portion 2Aa and the rear end portion 2Ab of the label 2A adsorbed by the front and rear protrusions 12a and 12b of the label holding portion 12 is held in close contact with the outer peripheral surface of the cylindrical portion 10b of the label transfer drum 10. Is done.

  When the labeler is not in operation, the glue applying means 14 is retracted by the air cylinder 58 so that the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 of the hot melt coating head 60 come into contact with the label transfer drum 10 side. Do not do it. During operation, the glue applying means 14 is advanced to the transfer drum 10 side, and the flat surface 60c on which the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 of the hot melt coating head 60 are formed is labeled. The label 2A held on the protrusions 12a and 12b of the holding part 12 is brought into contact with the label 2A.

  When the label 2A held on the label holding part 12 of the label transfer drum 10 rotates and reaches the front surface of the glue applying means 14, the label 2A is adsorbed on the upper surface of the front protruding part 12a of the label holding part 12. Since the most distal portion of the held portion (front end portion 2Aa) is slightly on the inclined surface on the front side in the rotation direction, the label 2A on the protruding portion 12a of the rotating label transfer drum 10 and the hot melt coating head The contact starts smoothly without interference with the flat surface 60c.

  When the flat surface 60c of the hot melt coating head 60 starts to contact the label 2A, glue is discharged from the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 and applied to the label 2A. During operation, the pump 68 is driven, and when the glue is not being discharged, the solenoid valves 68a, 68b, 68c provided in the three supply passages 66a, 66b, 66c, respectively, according to the command of the control device 62. The adhesive is not supplied to the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6. However, as described above, when the flat surface 60c of the head 60 starts to contact the label 2A, the control device 62 In response to the signal, the solenoid valves 68a, 68b, 68c provided in the supply passages 66a, 66b, 66c are opened, the paste is supplied from the paste supply means 64 to the paste application means 14, and the hot melt coating head 60 discharges. It is discharged from the outlets 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 and applied to the label 2A.

  The timing for starting the discharge of glue is determined by the position signal (encoder pulse signal) of the transfer drum 10, and the front side holding portion holding the front end portion 2Aa (see FIG. 6) of the label 2A. When it is detected that 12a has reached a predetermined position, the discharge of glue is started, and thereafter, measurement is performed by a timer, and the discharge of glue is stopped after a predetermined time has elapsed. When the length of applying the glue to the label 2A (the length in the rotation direction of the label 2A) is large, the glue is discharged for a long time accordingly. In this embodiment, the paste is not discharged for a time required for application to the set length (the length in the rotation direction), and is stopped for a time slightly shorter than that time. The remaining part of the required application length is applied by wiping off the glue remaining at the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 with the label 2A. As described above, when the paste is discharged from the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 of the hot melt coating head 60, the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 and the label holding unit 12 are used. The held label 2A is in contact, that is, the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 are closed by the label 2A. As a result, the label holding portion 12 made of an elastic body is retracted, and a gap is generated between the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 and the label 2A, and the glue overflows therefrom. ing.

  As shown in FIG. 6, after applying a predetermined length of glue on the front side (front end 2Aa) in the rotational direction of the label 2A held by the label holding part 12, the glue application part on the front side is denoted by reference numeral 70. The portion of the intermediate portion of the label 2A supported by the outer peripheral surface of the label transfer drum 10 passes through the front surface of the glue applying means 14, but this portion recedes inward in the radial direction with respect to the protruding portion 12a. Therefore, the hot melt coating head 60 is not contacted, and during this time, the electromagnetic valves 68a, 68b, 68c are closed to stop the supply of glue. Thereafter, when the portion (rear end portion 2Ab) of the label 2A held by the rearward protruding portion 12b reaches the position of the hot melt coating head 60, the label 2A and the hot melt coating head 60 come into contact again. The glue is applied to the rear end 2Ab of the label 2A in the same manner as the front end 2Aa of the label 2A.

In this embodiment, when applying glue to the rear end 2Ab of the label 2A, the discharge timing of glue from the upper set of discharge ports 60a1, 60a2 is set to the other two sets of discharge ports 60a3, 60a4, 60a5. , Earlier than 60a6. The electromagnetic valve 68a provided in the supply passage 66a for supplying the paste to the two discharge ports 60a1 and 60a2 in the first set is opened slightly earlier, and then the other two sets of discharges in the central portion and the lower portion are subsequently performed. The solenoid valves 68b and 68c of the outlets 60a3, 60a4, 60a5 and 60a6 are opened. Then, after a predetermined time has elapsed, closing the electromagnetic valve 68a of the first set of discharge ports 60A1,60a2, Later, the other two sets of solenoid valves 68b after the same time, closing the 68c. In this way, the part to which the glue discharged from the first pair of two outlets 60a1, 60a2 is applied by shifting the timing of discharging the glue from the outlets 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 72a is positioned slightly closer to the front end portion 2Aa than the portion 72b to which the glue discharged from the other two sets of discharge ports 60a3, 60a4, 60a5, 60a6 is applied. Therefore, a portion 2Ad to which no glue is applied is formed between the rear edge 2Ac of the label 2A and the portion 72a to which the paste is applied. Note that the width of each protrusion 12a, 12b of the label holding unit 12 (the width in the rotational direction) is larger than the length of the glue applied to the label 2A, and the length of glue required for the label 2A is larger. Even after the application is completed, the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 come into contact with the label 2A held by the label holding unit 12 and become the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6. The action of scraping off the remaining glue is performed.

  On the other hand, the container 18 to which the label 2A is adhered is transported by the supply conveyor 20, separated at a predetermined interval by the infeed screw 22, and delivered to the inlet star wheel 24. The inlet star wheel 24 rotates and conveys the received container 18 and delivers it to the container conveying device 16. The container transport device 16 rotationally transports the container 18 to the label attaching position B. The container 18 thus supplied to the container transport device 16 and to which the label 2A is attached is detected by a sensor (not shown), and when the container 18 is detected, the label 2A corresponding to the container 18 is supplied. . In this embodiment, when the container 18 is detected, the label 2A attached to the container 18 is cut by the cutter 6 and transferred to the transfer drum 10 to apply glue. When the container 18 is not detected, the supply of the label 2A to the transfer drum 10 is stopped. Further, before the label holding portion 12 that should hold the label 2A reaches the position of the glue applying means 14, the hot melt coating head 60 is moved backward by the air cylinder 58 and the label 2A is not held. Glue is prevented from adhering to the label holding unit 12.

  When the container 18 conveyed by the container conveying means 16 reaches the label attaching position B, the label 2A held by the label holding unit 12 is pressed and attached. The label 2A is pressed against the outer surface of the container 18 from the front end 2Aa side, and the glue application portion 70 on the front end 2Aa side is attached. Thereafter, the portion where the glue is not applied is wound around the outer surface of the container 18, and finally the glue application portions 72a and 72b of the rear end 2Ab are pasted. The container 18 to which the label 2 </ b> A is attached is rotated and conveyed by the rotation of the rotating body 26 of the container conveying device 16, and is discharged onto the discharge conveyor 30 by the outlet star wheel 28. In addition, the paste can be uniformly applied to necessary portions. The rear end 2Ab of the label 2A affixed to the container 18 is formed with a part 2Ad that is not partially coated with glue. When the label 2A is peeled off after the container 18 is used, this part 2Ad It can be easily peeled off as a clue. In this embodiment, the paste application portions 72a and 72b on the rear end side 2Ab of the label 2A are displaced in the front-rear direction (left-right direction in FIG. 6) of the label 2A, but have the same length. Sufficient adhesive strength can be ensured even at the portion where the peeling port is provided.

  In the above embodiment, the adhesive application portion 72a is slightly shifted to the front side on the upper side of the rear end portion 2Ab of the label 2A to form the portion 2Ad to which the adhesive is not applied most near the rear end portion. The upper portion is not necessarily limited to the upper portion, and a portion where no paste is applied may be formed in the central portion or the lower portion. In addition, the discharge timing of glue was controlled with two discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 as one set, but separate supply to each of the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6. The glue discharge timing may be individually controlled by supplying the glue from the passage. Conversely, it is also possible to control by setting three discharge ports as one set (60a1, 60a2, and 60a3 are one set, and 60a4, 60a5, and 60a6 are one set). Alternatively, the number of ejection ports in each group may be controlled to be different from each other (for example, one, two, two, three, two, one). In this embodiment, the hot melt coating head 60 is brought into contact with the label 2A to apply the paste, but the present invention is not limited to the contact type, and is also applicable to a type of labeler that injects hot melt in a non-contact manner. Is possible.

  When a single label 2A is wrapped around and attached to the periphery of the container 18, the rear end 2Ab of the label 2A is usually attached to the front end 2Aa. Can also be formed on the side of the front end 2Aa of the label 2A where no glue is applied as a clue to peel off the label 2A. For example, in the case where a portion where no glue is applied is formed on the upper side of the front end portion 2Aa of the label 2A, the electromagnetic valve 68a of the supply passage 66a for supplying the paste to the first and second discharge ports 60a1 and 60a2 The opening / closing timing is slightly delayed from the other solenoid valves 68b and 68c. In this case, after the label 2A is attached to the container 18, it can be easily peeled off from the part attached as the front end 2Aa side of the label 2A.

  FIG. 7 is a diagram showing an example in which different control is performed with respect to the timing at which the paste is discharged from the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, and 60a6 of the hot melt coating head 60. In this case, in order to apply glue to the rear end portion 2Ab of the label 2A, the start point when the glue is discharged from the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 is three sets of six The discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 are simultaneous, and the end point is advanced by the upper set of discharge ports 60a1, 60a2. Therefore, the portion 172a to which the glue discharged from the two discharge ports 60a1 and 60a2 on the upper side is applied is the portion to which the paste discharged from the other two sets of discharge ports 60a3, 60a4, 60a5 and 60a6 is applied. The length in the rotational direction is shorter than 72b. Also in this case, when the attached label 2A is peeled off from the container 18, there is a portion 2Ad to which no glue is applied on the rear end portion 2Ab side of the label 2A, so that the portion 2Ad can be easily peeled off as a clue. it can. Note that the front end portion 2Ab side of the label 2A performs the same control as that shown in FIG. 6 to form the glue application portion 70 having the same length. As described above, even in the control for shortening the discharge time of the glue, the peeling opening for the label 2A can be provided at the front end 2Aa of the label 2A. Further, in the case where the label peeling opening is provided on the front end 2Aa side, the discharge start times from the two upper discharge openings 60a1, 60a2 are set to the discharge start times from the other discharge openings 60a3, 60a4, 60a5, 60a6. The discharge end time may be set at the same time. In the case where a peeling port is provided at the label rear end 2Ab, all the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 start discharging at the same time, and the end times of the upper discharge ports 60a1, 60a2 are set. When the front end 2Aa is provided with a peeling port, the discharge start time from the upper discharge ports 60a1, 60a2 is delayed and all the discharge ports 60a1, 60a2, 60a3, 60a4, 60a5, 60a6 are provided. However, it is not always necessary to start at the same time or end at the same time, and the respective times can be shifted.

It is a top view which simplifies and shows the whole structure of a labeler. (Example 1) It is a longitudinal cross-sectional view of the transfer drum and glue application means provided in the labeler. It is a top view which expands and shows the principal part of a transfer drum and a paste application means. It is a perspective view of a hot-melt coating head. It is a figure which simplifies and shows the circuit which supplies paste to a hot-melt coating head. It is a figure explaining the process of affixing the label which apply | coated the paste to a container. It is a figure explaining the process of affixing the label which apply | coated glue by the other control to a container.

Explanation of symbols

2A label 2Aa label front end 2Ab label rear end 2Ac label edge (label rear edge)
DESCRIPTION OF SYMBOLS 10 Transfer drum 14 Paste application means 62 Control means 60a1 Discharge port 60a2 Discharge port 60a3 Discharge port 60a4 Discharge port 60a5 Discharge port 60a6 Discharge port

Claims (2)

A transfer drum for holding the label, a rotating means for rotating the transfer drum, a glue applying means for applying glue to the front and rear ends of the label held on the transfer drum, and controlling the glue applying means Control means for
The paste applying means has a plurality of discharge ports for discharging glue in the vertical direction, and has a configuration in which discharge control can be independently performed with one or a plurality of these discharge ports as a set,
The timing at which glue is discharged from at least one or a set of discharge ports is set to be earlier than the other discharge ports in the case of the rear end portion of the label and later in the case of the front end portion. Make the distance from the label edge of the glue application part that is discharged and applied to the label longer than the distance from the label edge of the glue application part by the other outlets. A labeler characterized by applying at least one. A transfer drum for holding a label, a rotating means for rotating the transfer drum, a glue applying means for applying glue to the front and rear ends of the label held on the transfer drum, and controlling the glue applying means Control means for
The paste applying means has a plurality of discharge ports for discharging glue in the vertical direction, and has a configuration in which discharge control can be independently performed with one or a plurality of these discharge ports as a set,
When applying glue to the rear end of the label, the discharge end time of the glue from at least one or one set of discharge ports is made earlier than the discharge end time from the other discharge ports, and the front end of the label When applying paste to the discharge port, the discharge start time of glue from at least one or one set of discharge ports is set to be later than the discharge start time from other discharge ports. Make the distance from the label edge of the glue application part applied to the label longer than the distance from the label edge of the glue application part by the other outlets, so that at least one of the front and rear edges of the label Labeler characterized by being applied.

Images