JP5183352B2 - Label sticking device - Google Patents

Description

  The present invention relates to a label sticking device for supplying and sticking a member to be stuck (for example, a label) to the surface of a container such as a PET bottle.

2. Description of the Related Art Conventionally, there has been proposed a label sticking apparatus that supplies a label to a container such as a PET bottle and sticks the label to the surface of the container with a heat-sensitive adhesive (for example, see Patent Document 1).
Japanese Patent No. 3036724

  FIG. 9 is a schematic configuration diagram showing a conventional label sticking apparatus.

  In this label sticking apparatus 100, a long label substrate S (a resin material having a heat-sensitive adhesive layer laminated on one side) is supplied from a supply reel 101 to a cut unit 104 via a plurality of feed rollers 102 and an air dancer 103. Supplied and cut into labels of a predetermined size. The cut label is sucked by the suction drum 105 and is stuck to the container B at a predetermined sticking position (position where the side surface of the container B is pressed against the peripheral surface of the suction drum 105. In FIG. To the position where the peripheral surface of the belt conveyor device 110 faces.

  The adsorption drum 105 is heated by the heating device 106. When the label is adsorbed from the cut unit 104 to the adsorption drum 105, the heat-sensitive adhesive of the label is activated, and in that state, the label is transferred to the sticking position. The The heat-sensitive adhesive is activated by heating and can be adhered to the container B of the label. However, the heat-sensitive adhesive decreases in tackiness when it is not heated, and loses its tackiness after it is not heated. It has a property of having a time until it is removed (hereinafter referred to as “adhesion duration”).

  On the other hand, a large number of containers B are sent to the star wheel 108 one by one by the screw shaft 107 and are transferred to the sticking position by the star wheel 108 and the guide plate 109. At this time, the container B is conveyed in the direction opposite to the rotation direction of the suction drum 105 while being pressed against the suction drum 105 by the belt 111 of the belt conveyor device 110.

  Accordingly, the label adsorbed on the adsorbing drum 105 is adhered to the side surface of the container B with the activated heat-sensitive adhesive when the tip reaches the adsorbing position, and the surface is adhered to the side surface of the container B by the rotation of the container B. Bonded sequentially. The container B to which the label is attached is transferred to the next process position by the discharge device 112.

  Although not shown in FIG. 9, a suction surface is provided at a predetermined position on the outer peripheral surface of the suction drum 105, and a plurality of suction holes for sucking labels are arranged in a lattice pattern on the suction surface. Has been drilled. The plurality of suction holes are sucked with a constant suction force by a suction device (not shown). The label cut out by the cut unit 104 is received by the suction surface of the suction drum 105 and transferred to the sticking position while being sucked by a plurality of suction holes.

  FIG. 10 is a cross-sectional view showing a state in which the label 113 is attracted to the suction surface 105A of the suction drum 105. In FIG. 11, for the sake of convenience of explanation, the suction surface 105A of the suction drum 105 is shown substantially horizontally.

  As shown in the drawing, the suction hole 105B formed in the suction surface 105A is sucked upward, whereby the label 113 is sucked on the suction surface 105A. In this case, a region of the suction surface 105 </ b> A where the plurality of suction holes 105 </ b> B are formed in a lattice shape is a rectangular shape that is slightly smaller than the size of the label 113. Therefore, as shown in FIG. 10, the front end portion 114 (see the rightmost crossing line portion) and the rear end portion 115 (see the leftmost crossing line portion) of the label 113 in the moving direction of the suction drum 105 (see the arrow S in FIG. 10). ) Is a portion that is not sucked by the suction hole 105B.

  On the other hand, in the conventional label apparatus 100, as shown in FIG. 9, the container B is linearly transferred from the right side below the suction drum 105 that rotates counterclockwise, and the container B is sucked at the suction position. Since the label 113 is adhered to the container B by being brought into pressure contact with the container B, the peripheral speed of the container B (speed at which the side surface rotates) is the peripheral speed of the suction drum 105 (rotation of the peripheral surface). Speed).

  As a result, in the conventional label apparatus 100, as shown in FIG. 11, the container B is pressed against the suction drum 105 that rotates counterclockwise at the peripheral speed v at the sticking position, whereby the container B is rotated at the peripheral speed. Since it is configured to rotate clockwise with v, as shown in FIGS. 4A to 4C, the upper surface of the label 113 sucked on the suction surface 105A of the stationary suction drum 105 is equivalently shown. Then, the container B is rotated so that the label 113 is wound around the container B so as to be stuck.

  In the conventional label apparatus 100, as described above, the label 113 is formed by rolling the container B on the surface of the label 113 adsorbed on the adsorption surface 105A of the adsorption drum 105 on the surface to which the heat-sensitive adhesive is applied. Affixed to the container B.

  When the operation of attaching the label 113 to the container B is started (see FIG. 11A), the tip portion 114 of the label 113 is pressed against the container B at the attaching position. It is stuck and wound around the container B with an adhesive (see FIG. 11B).

  However, before the sticking operation of the label 113 is completed, the rear end portion 115 of the label 113 is not sucked by the suction hole 105B of the suction drum 105 as shown in FIG. Float up. In this state, when the container B is rotated at the same peripheral speed as the suction drum 105 and the adhesive duration of the heat-sensitive adhesive has elapsed, the heat-sensitive adhesive at the rear end 115 of the label 113 is in an inactive state. turn into. Therefore, the rear end portion 115 of the label 113 is not properly attached to the container B, and there is a problem that wrinkles occur at the rear end portion 115 of the label 113.

  The present invention has been conceived under the circumstances described above, and it is an object of the present invention to provide a label attaching apparatus capable of appropriately attaching a rear end portion of a label to a container. .

  In order to solve the above problems, the present invention takes the following technical means.

The label sticking apparatus according to the present invention has a suction surface on which a plurality of suction holes are arranged , and sucks the surface of the label coated with a heat-sensitive adhesive on the back surface with the plurality of suction holes. A label holding unit that heats the label and activates the heat-sensitive adhesive, and a label transfer unit that transfers the label through the path by moving the label holding unit along a predetermined path. A container holding means for rotatably holding the container, and the container holding means is moved along a path different from the label holding means, and the side surface of the container is held by the label holding means at a predetermined sticking position on the path. and container transfer means for pressing a back surface of the label that is, when the side surface of the container is pressed against the label, the contents so that the side surfaces are moved at the same speed in the label in the same direction In the label sticking apparatus having a container rotating means for rotating at a first speed, wherein the label is wound on the vessel by rotation of the container, the label is the last in the label moving direction of the suction surface It comprises a container rotational speed control means for switching the second speed that is higher than said first speed peripheral speed of the container at a timing in a state of being attracted to the suction surface by the suction holes of the column, the said container first The portion remaining on the suction surface side of the label by rotating at a speed of 2 is slid on the suction surface and wound on the container in a state in which the portion is activated ( Claim 1).

The said label sticking apparatus WHEREIN: The said many suction holes are arrange | positioned in the said adsorption | suction surface at the grid | lattice form or zigzag form, and the said heat sensitive adhesive is good to be formed with the ethylene-type copolymer (Claim 2). ).

  3. The label sticking apparatus according to claim 1, wherein the label holding unit is rotatably supported, and is provided in a cylindrical drum having the suction surface formed on a part of an outer peripheral surface thereof. And a drum driving unit configured to rotate the drum at a predetermined rotational speed. The suction unit sucks a plurality of suction holes formed in the suction surface, and the heating unit heats the drum. The container transporting means is rotatably supported, and a rotation base provided with a support portion for rotatably supporting the container at the tip, and a rotation for rotating the rotation base in a direction opposite to the drum. The container transfer means is configured to drive the drum with the sticking position as a position where the outer peripheral surface of the drum intersects a line connecting the rotation center of the drum and the rotation center of the turntable. At the timing when the label adsorbed on the adsorption surface of the drum by the step is transferred to the adhering position, the container supported at the tip of the turntable is transferred to the adhering position, and the side surface of the container is used as the label. It is good to press-contact (Claim 3).

According to this configuration, the label is sucked by the label holding means, and the label holding means is moved to the sticking position by a predetermined path, while the container is held by the container holding means, and the container holding means is the label holding means. Is moved to a sticking position through a different route, and is wound while the side surface of the container is pressed against the label at the sticking position. When the label sticking operation is started, the rotation speed of the container is set to a first speed at which the movement speed of the side surface of the container is substantially the same as the movement speed of the label. The peripheral speed of the container is switched to a second speed higher than the first speed at a timing when the label is attracted to the suction surface by the suction hole of the last row in the label moving direction of the suction surface. . Thus, state portion remaining in the adsorption surface side of the label is pulled by rotation of the container, so slide on the suction surface, the heat-sensitive adhesive of the part before the lapse of the adhesive duration, was active activatable Thus, it can be adhered to the side surface of the container, and the generation of wrinkles at the rear end of the label can be suppressed.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic configuration diagram showing a label sticking apparatus according to the present invention. In addition, the arrow in a figure has shown the rotation direction of the rotation member. FIG. 2 is a block diagram showing an electrical configuration of the label sticking apparatus. In FIG. 2, the same members as those shown in FIG.

  The label sticking apparatus 1 sticks a label representing the name of a beverage, a detergent, or the like injected into the container such as a PET bottle. While this label sticking apparatus 1 moves a label along a predetermined transfer path, it transfers the container to a predetermined sticking position on the label transfer path, presses the container against the label at the predetermined position, and The container is stuck in such a manner that the label is wound around the side surface of the container by rotating the container in the same direction as the label transfer direction.

  As shown in FIG. 1, the label sticking apparatus 1 feeds out a long label base material S and cuts out the label base material S to generate a substantially rectangular label L (see FIG. 3). The device 2 and the label L generated by the label generating device 2 are sucked to a predetermined sticking position P (the peripheral surface of the suction drum 3 is the rotation center O ′ of the suction drum 3 and the rotation center of the turntable 521a described later) The adsorbing drum 3 to be transferred to a position near the line connecting O), the heating device 4 for heating the adsorbing drum 3, and the container B supplied from the outside are transferred to the adhering position P, and the adhering After sticking the label L at the position P, it is roughly constituted by the container transfer device 5 for carrying it out to the outside.

  In the label sticking apparatus 1, the label L and the container B are respectively transferred to the sticking position P and the label L is stuck to the container B. However, in the label sticking apparatus 1 according to the present embodiment, the label is attached. At a predetermined timing before L is stuck to the container B and the sticking operation is finished, the peripheral speed of the container B is made faster than the peripheral speed of the suction drum 3, thereby wrinkling at the end of the label L. It is characterized in that it is configured so as not to cause the problem. Details will be described below.

  The label base material S used in the present embodiment is a transparent or translucent long base material in which a heat-sensitive adhesive is applied to one surface of a polyester film, for example. This polyester film is formed from, for example, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate or the like, which has a characteristic that does not shrink due to a heating temperature such as retort sterilization.

  The heat-sensitive adhesive is a hot-melt adhesive that is activated by heating at a predetermined temperature of, for example, 100 ° C. or less and exhibits adhesive properties. For example, an ethylene acrylate copolymer and an ethylene methacrylate copolymer It is formed by an ethylene-based copolymer such as The heat-sensitive adhesive in this embodiment has a sticking duration (in this embodiment, the time from when the label L is no longer heated until the heat-sensitive adhesive becomes inactive), for example, about 0.5 seconds. Things are used. In addition, the structure of the label base material S is not limited to the said polyester film and the said heat sensitive adhesive.

  As shown in FIG. 3, the label generating apparatus 2 feeds the label base material S from a supply reel 201 around which a long label base material S is wound in advance, and has a predetermined shape (for example, a rectangular shape). Etc.) to generate a label L.

  The label generating apparatus 2 includes the above-described supply reel 201, a plurality of guide rollers 202 for transferring the label base material S, and a label base material feed for feeding out the label base material S wound around the supply reel 201. A part 203, a label cut part 204 for cutting out the label base material S into a label L of a predetermined size (size attached to the container B), and a label L generated by cutting out the label base material S A label delivery drum 205 for transferring to the drum 3 and a remaining take-up reel 206 for taking up the unnecessary portion left after the label base material S is cut out by the label cut unit 204 are roughly constituted.

  The label base material feed unit 203 includes a label feed roller 203a, an auxiliary roller 203b, a label feed motor 701 (see FIG. 2) that rotationally drives the label feed roller 203a, and a servo amplifier 702 that controls the label feed motor 701 (see FIG. 2). 2). As shown in FIG. 2, the servo amplifier 702 is connected to a control device 6 that comprehensively controls the entire apparatus, and the label feed motor 701 is driven to rotate by the control device 6 via the servo amplifier 702. .

  Here, the electrical configuration of FIG. 2 will be briefly described. The control device 6 has a microcomputer (not shown), and based on an operation program stored in advance, the label transfer generation device 1 and the suction drum 3. And each operation | movement of the container transfer apparatus 5 grade | etc., Is controlled. The control device 6 includes a memory (not shown) for storing various data.

  A label feed roller 203a in the label generating device, a cut blade roller 204a, a label delivery drum 205, a remaining take-up reel 206, a suction drum 3, a star wheel 511 in the container transfer device 5, a turntable 521a, a star wheel 531, etc. The rotating member is connected to the control device 6 via the drive unit 7. The drive unit 7 is provided with a motor that generates a rotational force corresponding to each of the rotating members, and a servo amplifier and an inverter that control the rotational operation of the motor. The control device 6 performs control so that the rotation operations of the respective rotation members are linked via the drive unit 7.

  The control device 6 is connected to a heating device 4, a suction device 8 for a label delivery drum, which will be described later, and a suction device 9 for a suction drum, and an operation display device 10. The control device 6 is connected to the heating device 4. The heating operation and the suction operations of the suction devices 8 and 9 are also controlled.

  The operation display device 10 is a device for an operator to perform various settings relating to a label sticking operation and to display an operation state of label sticking as display data. For example, when an operator performs a predetermined operation through the operation display device 10, an operation signal corresponding to the operation is output to the control device 6. Further, display data from the control device 6 is input to the operation display device 10, and display contents corresponding to the display data are displayed.

  Returning to FIG. 1, the label base material S wound around the supply reel 201 is guided by a plurality of guide rollers 202 in an initial setting, and between the label feed roller 203a and the auxiliary roller 203b, and the cutting blade roller 204a. And the auxiliary roller 204b so as to be wound around the remaining take-up reel 206 after being drawn. Accordingly, when a control signal is output from the controller 6 to the servo amplifier 702, the label feed roller 203a is rotated by the label feed motor 701, and the label base material S is fed out from the supply reel 201.

  The label cutting unit 204 includes a cutting blade roller 204a provided with a cutter blade (not shown) for cutting out the label base material S on the outer peripheral surface, an auxiliary roller 204b, and a cutter motor 703 that rotationally drives the cutting blade roller 204a ( 2) and a servo amplifier 704 (see FIG. 2) for controlling the cutter motor 703. As shown in FIG. 2, the servo amplifier 704 is also connected to the control device 6, and the cutter motor 703 is rotated by the control device 6 via the servo amplifier 704. Accordingly, when a control signal is output from the control device 6 to the servo amplifier 704, the cutting blade roller 204a is rotated by the label feeding motor 703, and the label base material S supplied from the label feeding portion 203 is cut by the cutter of the cutting blade roller 204a. Cut out by blade.

  A label delivery drum 205 is in contact with an appropriate place on the peripheral surface of the cutting blade roller 204a, and the label L cut out by the cutting blade roller 204a is delivered to the label delivery drum 205 at the contact position. In FIG. 1, a heat-sensitive adhesive is applied to the surface of the label base material S that contacts the cutting blade roller 204a. However, since the heat-sensitive adhesive is not activated, it is transferred to the label transfer drum 205. The label L is not adhered to the label delivery drum 205.

  On the other hand, the remaining take-up reel 206 is disposed on the downstream side of the label cut portion 204, and an unnecessary portion of the label base material S that has not become the label L is guided from the auxiliary roller 204b to the remaining take-up reel 206, and the remaining residue. It is taken up on a take-up reel 206. As shown in FIG. 2, the remaining take-up reel 206 is rotated by a take-up reel motor 707, and the rotation control of the take-up reel motor 707 is performed by a servo amplifier 708 and the control device 6.

  The control device 6 synchronously outputs control signals for the rollers of the label feed roller 203a, the cutting blade roller 204a, and the remaining take-up reel 206 in the label base material feed unit 203, and rotates these rollers in synchronization. Accordingly, as shown in FIG. 3, a plurality of labels L are sequentially turned by the cutter blades of the cutting blade roller 204a from the label base material S which is fed out from the supply reel 201 at a constant speed and taken up by the remaining take-up reel 206. And is supplied to the label delivery drum 205.

  The label transfer drum 205 is formed in a substantially cylindrical shape, and an appropriate position on the outer peripheral surface on the opposite side of the cutting blade roller 204a (Q point on the right peripheral surface of the label transfer drum 205 in FIG. 1) is in contact with the suction drum 3. Yes. As shown in FIG. 2, the label delivery drum 205 is rotated in a predetermined direction (clockwise in FIG. 1) by a label delivery drum motor 705 at a constant rotational speed, and the rotation control of the label delivery drum motor 705 is controlled by a servo. This is performed by the amplifier 706 and the control device 6.

  A large number of suction holes (not shown) are formed on the outer peripheral surface of the label delivery drum 205. When the label delivery drum 205 rotates, these suction holes are sucked by a suction device 8 (see FIG. 2) such as a compressor. It is configured to be. Accordingly, the label L cut out by the label cutting unit 204 and conveyed along the peripheral surface of the cutting blade roller 204 a is transferred to the label transfer drum 205 by being attracted to the outer peripheral surface of the label transfer drum 205.

  The control device 6 uses control signals for the label delivery drum 205 and the suction device 8 as control signals for the label feed roller 203a, the cutting blade roller 204a, and the remaining take-up reel 206 in the label base material feed unit 203. Synchronously output, the label transfer drum 205 is rotated in synchronization with these rollers, and the suction operation of the suction device 8 is performed. Accordingly, the plurality of labels L continuously supplied from the cutting blade roller 204 a are sequentially received by the label delivery drum 205 and delivered to the suction drum 3 by the label delivery drum 205.

  The suction drum 3 has a substantially cylindrical shape like the label delivery drum 205, and the outer peripheral surface is covered with a rubber member. The reason why the outer peripheral surface is covered with the rubber member is to absorb the pressure because the side surface of the container B is pressed against the outer peripheral surface of the suction drum 3 when the label L is attached to the container B. The elastic member is not limited to the rubber member.

  As shown in FIG. 4, a suction surface 301 for sucking the label L is provided at a predetermined position on the outer peripheral surface of the suction drum 3, and the suction surface 301 has a plurality of suction holes arranged in a lattice pattern. 302 is formed. The diameter of the suction holes 302 is about 0.5 mm, and the distance between the suction holes 302 is, for example, a vertical distance h of about 10 mm and a horizontal distance d of about 12 mm. The area where the plurality of suction holes 302 are formed in the suction surface 301 of the suction drum 3 has a rectangular shape that is slightly smaller than the size of the label L, as shown in FIG. Note that the arrangement of the suction holes 302 on the suction surface 301 is not limited to the lattice shape, and can be appropriately changed to, for example, a staggered arrangement.

  A suction device 9 (see FIG. 2) such as a compressor is connected to the back surface (the inside of the suction drum 3) of the suction surface 301, and the suction hole 302 is sucked by the suction device 9 so that the label delivery drum 205 The delivered label L is adsorbed on the adsorption surface 301.

  The diameter of the suction drum 3 is set larger than the diameter of the label delivery drum 205. As shown in FIG. 2, the suction drum 3 is rotated in a predetermined direction (counterclockwise in FIG. 1) by a suction drum motor 709 at a constant rotational speed, and the rotation control of the suction drum motor 709 is controlled by a servo amplifier 710. And the control device 6. The rotation speed of the suction drum 3 is a speed at which the peripheral speed of the suction drum 3 and the peripheral speed of the label delivery drum 205 are the same.

  A heating device 4 is provided at an appropriate location upstream of the label delivery drum 205 of the suction drum 3. The heating device 4 heats and activates the heat-sensitive adhesive applied to the surface of the label L adsorbed on the adsorption surface 301 of the adsorption drum 3 by heating the adsorption drum 3. The heating control of the heating device 4 is performed by the control device 6, and the control device 6 causes the heating device 4 to perform the heating operation in synchronization with the rotation operation of the suction drum 3.

  Accordingly, when the label sticking apparatus 1 is operating, the suction drum 3 is rotated at a constant speed in a heated state, so that the label L is received by the suction surface 301 of the suction drum 3 from the label delivery drum 205 at the delivery position Q. When passed, the heat-sensitive adhesive of the label L (applied to the surface not contacting the suction surface 301 of the suction drum 3) is heated and activated by the suction drum 3, and the heat-sensitive adhesive of label L is activated. In this state, the suction drum 3 is moved to the sticking position P by the rotation of the suction drum 3.

  The container transfer device 5 receives a container B to which a label L supplied from the outside is not attached, and transfers the container B to a rotary device 52 (described later) and the container B from the container supply unit 51 to a predetermined size. The rotary device 52 that transports the circular orbit as a transfer path, and the container unloading unit 53 that receives the container B with the label L attached at the attaching position P from the rotary device 52 and carries it out to the outside.

  The container transfer device 5 is disposed on the right side of the suction drum 3 in FIG. Specifically, the rotary device 52 is disposed so as to be positioned between the suction drum 3 and the container supply unit 51 and the container carry-out unit 53, and on the transfer path (circular orbit) of the container B in the rotary device 52. The receiving position R of the container B from the container supply part 51, the sticking position P, and the delivery position T of the container B to the container discharging part 53 are arranged.

  In FIG. 1, the sticking position P is disposed at the left end of the circular orbit of the container B in the rotary device 52, the receiving position R is disposed slightly below the right end of the circular orbit, and the delivery position T is the same circle. Located slightly above the right end of the track. Accordingly, the container B is supplied from the lower right side of the label sticking device 1 from the outside and transferred in a circular path so as to pass through the sticking position P, and then from the upper right side of the label sticking device 1 to the outside. Discharged.

  The container supply unit 51 includes a star wheel 511 for transferring the container B, a guide member 512 for guiding the container B, a star wheel motor 715 for rotating the star wheel 511 (see FIG. 2), And an inverter 716 (see FIG. 2) for controlling the wheel motor 715. As shown in FIG. 2, the inverter 716 is connected to the control device 6, and the star wheel motor 715 is rotationally driven by the control device 6 via the inverter 716.

  The star wheel 511 is formed with a recess 511a for holding the container B. The container supply unit 51 receives the container B to which the label L supplied from the outside is not attached by the recess 511 a of the star wheel 511, and transfers the container B to the rotary device 52 by the rotation of the star wheel 511.

  The container carry-out section 53 basically guides the container B and the star wheel 531 for transporting the container B, just like the container supply section 51, only the transfer direction of the container B is opposite to the container supply section 51. And a star wheel motor 717 for rotating the star wheel 531 (see FIG. 2) and an inverter 718 for controlling the star wheel motor 717 (see FIG. 2). The inverter 718 is also connected to the control device 6, and the rotational drive of the star wheel motor 717 is performed by the control device 6 via the inverter 718.

  The star wheel 531 is formed with a recess 531a for holding the container B, and the container carry-out unit 53 removes the container B to which the label L transferred by the rotary device 52 is attached to the recess 531a of the star wheel 531. And is carried out to the outside (next process) by the rotation of the star wheel 531.

  The rotary device 52 transfers the container B supplied by the container supply unit 51 to the sticking position P, presses the container B against the suction drum 3 at the sticking position P, and sticks the label L to the label B. The container B to which L is attached is transferred to the container carry-out unit 53. The rotary device 52 includes a turntable 521a that rotates around a center O, an extended portion 521b that extends from the turntable 521a and is provided with a container rotating device 522, and a turntable that rotates the turntable 521a. The rotating mechanism 521 includes a motor 711 (see FIG. 2) and an inverter 712 (see FIG. 2) that controls the rotating table motor 711.

  As shown in FIG. 2, the inverter 712 is connected to the control device 6, and the rotation of the rotary table motor 711 is performed by the control device 6 via the inverter 712. The turntable 521a is rotated in a predetermined direction (clockwise in FIG. 1) at a constant rotation speed by the turntable motor 711. The rotation speed of the turntable 521a is the same as the rotation speed of the suction drum 3.

  The rotation operation of the turntable 521a is performed in synchronization with the rotation operation of the suction drum 3 by the control device 6, and when the suction surface 301 of the suction drum 3 passes the sticking position P, the turntable 521a. The extending portion 521b is controlled so that the tip (portion holding the container B) passes through the sticking position P.

  The container rotating device 522 includes a container rotating unit 523 (see FIG. 5) that rotatably holds the container B at the tip of the extending portion 521b. In FIG. 1, the container rotating unit 523 rotatably holds the container B at the receiving position R of the container B transferred from the container supply unit 51 and supplies the container B to which the label L is attached to the container discharging unit 53. The container B is opened at the delivery position T.

  The extending portion 521b further includes a container rotation motor 713 that generates the rotation force of the container B, and a plurality of gears that transmit the rotation force of the container rotation motor 713 to the container rotation portion 523 and rotate the container B. A transmission mechanism (not shown) is provided. The container rotation motor 713 is connected to the control device 6 via a servo amplifier 714 (see FIG. 2), and the rotation operation of the container rotation unit 523 is performed by the servo amplifier 714 and the control device 6. The rotational force of the container rotation motor 713 may be transmitted to the container B by another container rotating unit 524 (see FIG. 5) that holds the container B rotatably from above. Or you may transmit to the container B by both the container rotation parts 523,524.

  As shown in FIG. 6, when the container B is transferred to the sticking position P by the rotation of the turntable 521 a, the container rotating device 522 transmits the rotational force of the container rotating motor 713 by the transmission mechanism when the container B is transferred to the attaching position P. And the container B is rotated in a predetermined direction (clockwise in FIG. 6) at a predetermined rotational speed.

Specifically, when the container B is transferred to the sticking position P and the peripheral speed of the suction drum 3 is v ₁ [mm / s], the container rotating device 522, as shown in FIG. The container B is rotated at the same peripheral speed as the peripheral speed v _{1 of} 3. Further, the container rotating device 522 rotates the container B by switching to a peripheral speed v ₂ larger than the peripheral speed v ₁ of the suction drum 3 at a predetermined timing when the sticking operation of the label L to the container B is completed. The relationship between the circumferential velocity v ₂ of the peripheral speed v ₁ and the container B the suction drum 3, will be described later. In FIG. 6, the suction hole 302 of the suction drum 3 is schematically shown.

  Next, the sticking operation of the label sticking apparatus 1 will be described.

  Referring to FIG. 1, the long label substrate S wound around the supply reel 201 is fed out of the supply reel 201 when the label feed roller 203 a of the label feed device 203 is driven to rotate. The fed-out label base material S is cut out when the cutting blade roller 204a of the cutter device 204 is rotationally driven, and is separated into a portion that becomes a label L and an unnecessary portion. The cut-out label L is adsorbed on the surface of the label delivery drum 205 sucked by the suction device 8 and transferred by the rotation of the label delivery drum 205. On the other hand, the unnecessary portion is taken up by the remaining take-up reel 206 when the remaining take-up reel 206 is driven to rotate.

  The label L transferred by the label transfer drum 205 is transferred to the suction drum 3 at a predetermined transfer position Q on the label transfer drum 205. The delivered label L is sucked by the suction surface 301 of the suction drum 3 sucked by the suction device 9, heated by the heating device 4, and transferred to the sticking position P by the rotation of the suction drum 3.

On the other hand, containers B to which a large number of labels L supplied from the outside are not attached are separated one by one by the recesses 511a of the star wheel 511 of the container supply unit 51 and transferred to the rotary device 52 side at the receiving position R. It is received by the container rotating part 523 provided in the extending part 521b of the rotating mechanism 521. The container B received by the container rotating part 523 is transferred to the sticking position P as the turntable part 521a rotates. At this time, the container B is rotated at substantially the same peripheral speed as the peripheral speed v ₁ of the suction drum 3 by rotating the container rotating part 523 by the container rotating motor 713.

  When the container B is transferred to the sticking position P while being rotated by the container rotating unit 523, the container B is connected to the rotation center O of the rotary device 52 and the rotation center O ′ of the suction drum 3 as shown in FIG. As shown in FIG. 5, the side surface of the container B is pressed against the outer peripheral surface of the suction drum 3.

  FIG. 7 is a diagram illustrating a process in which the label L is attached to the container B. Moreover, FIG. 8 is a figure which shows the change of the circumferential speed of the container B at the time of sticking operation | movement.

FIG. 7A shows the time when the tip of the label L is transferred to the sticking position P, the container B is transferred to the sticking position P, and the label L starts to stick to the container B. The front end is not bonded to the container B. The state of FIG. 7A is a state at time t ₁ when the label L starts to be attached to the container B as shown in FIG. 8. In this state, the peripheral speed of the container B (the moving speed of the side surface of the container B) ) Is set to the same speed as the circumferential speed v ₁ of the suction drum 3 (the moving speed of the label L), and both the suction drum 3 and the container B rotate at the circumferential speed v ₁ . Since the control device 6 controls each rotation operation of the suction drum 3 and the container rotating unit 523, the control device 6 recognizes the time t ₁ when the label L is attached to the container B.

FIG. 7B shows a state in which the label L is wound around the side surface of the container B. In this state, since the label L is transferred to the sticking position P in a state where the heat-sensitive adhesive 11 is activated by the suction drum 3, the side surface of the container B is pressed against the heat-sensitive adhesive 11 of the label L, As a result, the label L is stuck while being wound around the side surface of the container B. Even in the state of FIG. 7B, the suction drum 3 and the container B are rotated at a circumferential speed v ₁ of substantially the same speed.

  FIG.7 (c) has shown the state before the sticking operation | movement with respect to the container B of the label L is complete | finished. This state is a state when the suction holes 302 in the last row in the moving direction of the label L reach the sticking position P among the suction holes 302 arranged in a lattice pattern on the suction surface 301 of the suction drum 3. In this state, the label L is sucked onto the suction surface 301 only by the suction holes 302 in the last row.

In timing in this state, the control device 6, the peripheral speed of the container B, as shown at time t ₂ in FIG. 8, switching to higher circumferential velocity v ₂ than the circumferential velocity v ₁ of the suction drum 3. As the peripheral speed of the container B increases to v ₂ , as shown in FIG. 7D, the label L is pulled by the rotation of the container B, and the rear end portion La (see FIG. 7C) of the label L is pulled. ) Slides on the suction surface 301 of the suction drum 3 by a distance D (see FIG. 7C).

  That is, before the sticking operation of the label L to the container B is completed, the rear end portion La of the label L is not sucked by the suction hole 302 as shown in FIG. It will rise from 301. For this reason, heat is not transmitted to the rear end portion La of the label L via the suction drum 3, and the rear end portion La of the label L becomes inactive when the sticking duration of the heat-sensitive adhesive 11 has elapsed. It becomes a state. Therefore, the rear end portion La of the label L does not adhere to the container B, and the portion is wrinkled.

However, in the label sticking apparatus 1 according to the present embodiment, when the sticking of the label L to the container B is started as described above, the peripheral speed of the container B is equal to the peripheral speed v ₁ of the suction drum 3. At the timing when the suction holes 302 in the last row in the moving direction of the label L reach the sticking position P, the peripheral speed of the container B is set to a peripheral speed v ₂ that is faster than the peripheral speed v ₁ of the suction drum 3. Be raised. Therefore, when the moving speed of the label L increases from the peripheral speed v ₁ of the suction drum 3 to v ₂ , the rear end portion La of the label L is relatively fast relative to the peripheral surface of the suction drum 3 by the container B ( v ₂ −v ₁ ).

  As a result, as shown in FIG. 7D, the rear end portion La of the label L slides forward (right side in FIG. 7D) before the adhesion duration time elapses. Therefore, the heat of the suction drum 3 transmitted to the rear end portion La of the label L of the heat-sensitive adhesive 11 is maintained, and the rear end portion La of the label L is stuck to the container B in an activated state. become. Therefore, wrinkles can be prevented from occurring at the rear end portion La of the label L.

Thereafter, the control device 6 returns the circumferential speed of the container B from v ₂ to v ₁ at time t ₃ (see FIG. 8) when the label L finishes sticking to the container B, and the container B is moved to the circumferential speed of the suction drum 3. v ₂ and rotate at the same speed.

Since the suction drum 3 rotates at the peripheral speed v ₁ and the container B moves on the circular orbit by the rotation mechanism 521, the same figure is strictly shown by the time difference between (c) and (d) in FIG. In (d), the suction drum 3 and the container B are both moved to the right side, but the time difference is so small that in FIGS. 7 (c) and 7 (d), the suction drum 3 and the container B are not moved. Yes.

In the above description, the peripheral speed of the container B is substantially the same as the peripheral speed v ₁ of the suction drum 3 until it is transferred to the sticking position P. However, the container B is received from the container supply unit 51. until transferred to sticking position P may be rotated at a peripheral speed v ₁ allowed to stop, when you start adhered simultaneously.

The peripheral speed of the container B is set to a peripheral speed v ₂ faster than the peripheral speed v ₁ of the suction drum 3 because the label L is pulled by the container B before the sticking duration of the heat-sensitive adhesive 11 ends, and the wrinkle is reduced. Therefore, the peripheral speed v ₂ is determined by the distance from the suction hole 302 in the last row to the end of the label L, and the relative speed with respect to the suction drum 3 ( Based on v ₂ −v ₁ ), it may be set to an appropriate value that can achieve the purpose.

In this case, in this embodiment, since the diameter of the circular orbit for transferring the container B by the turntable 521a is relatively large with respect to the diameter of the suction drum 3, the moving speed of the container B on the circular orbit at the sticking position P. The moving speed of the label L adsorbed on the adsorbing drum 3 is larger than that, and the container B is stopped with respect to the label L in a very short time for adhering the label L, and rotates at the peripheral speed v ₂ . Can be considered. Accordingly, the setting of the peripheral speed v _2, it is possible to ignore the movement speed of the circular orbit of the container B.

  Of course, the scope of the present invention is not limited to the embodiment described above. For example, the configuration of the label sticking device in which the label is stuck to the container shown in the above embodiment is an example, and the configuration according to the above embodiment is not limited as long as it has the same function.

  Moreover, in the said embodiment, although the timing (refer FIG.7 (c)) when the suction hole 302 of the last row in the moving direction of the label L reached the sticking position P was recognized by the control apparatus 6, this is recognized. Instead, a position detection device that detects that the suction hole 302 in the last row in the moving direction of the label L has reached the sticking position P is provided at an appropriate position on the suction drum 3, and the timing is determined by the output of the position detection device. May be recognized.

  In the above embodiment, the label L is attracted to the suction surface 301 of the cylindrical suction drum 3 and transferred to the sticking position P, and the container B is also transferred to the sticking position P by the rotating mechanism 521 that draws a circular orbit. Therefore, the transfer path of the label L and the container B is circular, but the transfer path of the label L and the container B is not limited to a circle. In the present invention, as shown in FIG. 7, the label L and the container B are pressed in contact with the label L while rotating the container B in the moving direction of the label L at the sticking position P while moving the label L and the container B in the same direction. If it has the structure which sticks L to the container B, it can apply to arbitrary moving paths.

It is a schematic block diagram which shows the label sticking apparatus which concerns on this invention. It is a block diagram which shows the electric constitution of a label sticking apparatus. It is a figure which shows the production | generation method of the label in a label production | generation apparatus. It is a figure which shows the suction hole formed in the outer peripheral surface of a suction drum, and the label attracted | sucked by the suction hole. It is a side view which shows a mode that a label is stuck to a container in the sticking position. It is a top view which shows a mode that a label is stuck to a container in the sticking position. It is a figure which shows the process in which a label is affixed on a container from an adsorption drum. It is a figure which shows the change of the circumferential speed of a container. It is a schematic block diagram which shows the conventional label sticking apparatus. It is a figure which shows a state when the conventional label is stuck on a container. It is a figure for demonstrating the sticking operation | movement to the container of the label in the conventional label sticking apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Label sticking apparatus 2 Label production | generation apparatus 201 Supply reel 202 Guide roller 203 Label base material feed part 204 Label cut part 205 Label delivery drum 206 Remaining take-up reel 3 Adsorption drum 301 Adsorption surface 302 Suction hole 4 Heating apparatus 5 Container transfer apparatus DESCRIPTION OF SYMBOLS 51 Container supply part 52 Rotary apparatus 53 Container unloading part 6 Control apparatus 7 Drive part 8,9 Suction apparatus 10 Operation display apparatus 11 Heat sensitive adhesive B Container L Label S Label base material

Claims (3)

Holding the label by sucking the surface of the label having a suction surface in which a large number of suction holes are arranged and the heat-sensitive adhesive is applied to the back surface by the suction holes, and heating the label Label holding means for activating the heat-sensitive adhesive;
Label transfer means for transferring the label along the path by moving the label holding means along a predetermined path;
Container holding means for holding the container rotatably;
Container transporting means for moving the container holding means along a path different from the label holding means, and pressing the side surface of the container against the back surface of the label held by the label holding means at a predetermined sticking position on the path When,
Container rotating means for rotating the container at a first speed such that when the side surface of the container is pressed against the label, the side surface moves at the same speed in the same direction as the label;
In the label sticking apparatus provided with
The label is the wound in the vessel by rotation of the container, the peripheral speed of the container at a timing when the label is in a state of being attracted to the suction surface by the suction holes of the last column in the label moving direction of the suction surface A container rotation speed control means for switching to a second speed higher than the first speed ,
By rotating the container at the second speed, the portion remaining on the suction surface side of the label is slid on the suction surface, and the portion is wound on the container in an activated state. A label sticking device. The plurality of suction holes are arranged in a lattice or zigzag pattern on the suction surface,
The label sticking apparatus according to claim 1, wherein the heat-sensitive adhesive is formed of an ethylene-based copolymer . The label holding means is rotatably supported and includes a cylindrical drum having the suction surface formed on a part of an outer peripheral surface thereof, and a plurality of suction holes provided in the drum and formed on the suction surface. A suction means for sucking, and a heating means for heating the drum;
The label transfer means is composed of drum driving means for rotating the drum at a predetermined rotational speed,
The container transfer means includes a turntable that is rotatably supported and provided with a support portion that rotatably supports the container, and a turntable drive means that rotates the turntable in a direction opposite to the drum. Configured,
The container transfer means is configured such that the drum driving means causes the drum's suction surface to be a surface where the outer peripheral surface of the drum intersects a line connecting the rotation center of the drum and the rotation center of the turntable. The container supported by the front-end | tip of the said turntable is transferred to the said sticking position at the timing which the adsorbed label is transferred to the said sticking position, The side surface of the said container is press-contacted to the said label. The label applicator described in 1.

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