JPH0699961A - Labeler with device for taking out label - Google Patents

Abstract

PURPOSE:To automatically perform a sampling inspection and removal of defective label without damage to the label. CONSTITUTION:There are provided a label feed means, a vacuum drum 18 provided with a sucking pad 16, and a pasting means 20 for applying paste to a label 2a. Vacuum is applied to the pad 16 to hold the label when the pad receives the label from the label feed means to affix it to a container B. In a position P where the label is affixed to the container, vacuum is broken and pressure air is blown out to separate the label from the pad 16. At the affixing position, the pad is connected through a solenoid valve to an air pressure source and a vacuum source so as to be changed over to either one of the sources.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is a labeler (labeling machine).
In particular, it is equipped with a sampling inspection to confirm the imprinted state on the label, glued state or label cut state in the case of roll labeler, and a label takeout device to take out if there is a defective label during labeling work. It is about a lavera.

[0002]

2. Description of the Related Art Generally, a labeler supplies a label supply means for supplying labels one by one, a vacuum drum for adsorbing and holding the labels by a vacuum and transferring the labels, and an adhesive (adhesive) on the back surface of the label held by the vacuum drum. It is equipped with a gumming unit for applying the agent), and the label held by the vacuum drum is pressed and attached to the container that has been conveyed by a conveyer such as a conveyor or a rotary table. .
Further, the labeler is usually provided with a marking device for printing the date, manufacturing number and the like on the front surface, the back surface or both surfaces of the label. Further, as the label supply means, in addition to a type in which a large number of labels are housed in a label magazine and picked up one by one by a picker, a strip-shaped label material on which labels are continuously printed is wound in a roll shape. There is also used a type in which each roll label is cut and supplied by a cutter.

In the labeler having the above-mentioned structure, it is necessary to perform a sampling inspection to check the coating state of glue on the label, the printing state by the marking device, the cutting state of the roll label, etc. At the attaching position where the label is attached to the container on the conveying means, the label is manually taken out and inspected.

[0004]

However, the manual sampling inspection has a problem that the workability is poor and the operator is in danger.

Further, when a defective label such as a defective marking or a deviation of the cutting position appears during the normal labeling operation,
A defective label removing device capable of automatically taking out this defective label is already known (Japanese Patent Publication No. 3-4981).
No. 0). The labeling machine described in this publication is equipped with a sticking drum that sucks and transfers a label by negative pressure and sticks it to a container on a conveyor. An annular groove is provided on the peripheral surface of the drum, and the drum is also provided. A removal comb is provided around the. In this device, when a defective label is detected by the sensor, a removal comb is inserted into the annular groove to forcibly remove the defective label. As described above, it is not preferable to forcibly peel off the adsorbed label due to the negative pressure, because the label is damaged, and it is impossible to apply it to the sampling inspection.

The present invention has been made in order to eliminate the above-mentioned problems, and it is possible to take out a label and perform an inspection automatically at the time of sampling and without adding damage or the like.
Another object of the present invention is to provide a labeler equipped with a label take-out device that does not damage the label even when the defective label is removed.

[0007]

A labeler equipped with a label take-out device according to the present invention comprises a label supply means for supplying a label, a vacuum drum for adsorbing and holding the label and adhering it to the container, and a container carrying means for carrying the container. And means. The vacuum drum is provided with a label suction pad that sucks and holds a label. The label suction pad is connected to a vacuum source to actuate the vacuum from the delivery position where the label is supplied by the label supply means to the application position where the label is applied to the container. Further, at the pasting position, it is possible to switch between a state in which the vacuum is cut off and a state in which the vacuum acts.

[0008]

With the labeler equipped with the above-mentioned label take-out means, at the time of normal labeling, a vacuum is applied to the label adsorption pad to adsorb and transfer the label, and the vacuum is cut off at the label attaching position to deliver the label to the container side. Stick it. At the time of sampling or removal of a defective label, vacuum is applied to the label suction pad even at the sticking position, and the label is sucked and transferred to the downstream side to be taken out.

[0009]

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a plan view of a rotary roll labeler equipped with a label extracting device according to an embodiment of the present invention. A roll label (not shown) in which the strip-shaped label material 2 is wound
Is wound around a large number of guide rollers 4 and sent to the feed roller 6. The strip-shaped label 2 is sandwiched between the feed roller 6 and the pressure roller 8 and sent to the rotary cutter 10. A mark sensor 9 is provided on the side of the feed roller 6, and the position of the mark on the label material 2 is detected to feed the label material 2 by the feed roller 6 so that the label is cut at an accurate position. Control the amount. The labels 2a cut one by one by the rotary cutter 10 are suction-held on the outer peripheral surface of the delivery roller 12 equipped with a vacuum suction mechanism, and are rotationally transferred. During the transfer by the delivery roller 12, the marking device 14 prints the date, manufacturing number, and the like. The feed roller 6, the rotary cutter 10, the delivery roller 12 and the like constitute a label supply means. In this embodiment, the label 2a cut by the rotary cutter 10 is supplied to the vacuum drum 18 via the delivery roller 12, but the present invention is not limited to this, and the label 2a is supplied to the vacuum drum 18 directly from the cutter or via other means. A label may be supplied.

Further, in each label 2a, in the delivery position U, a label suction pad 16 (see FIG. 2) connected to a vacuum suction mechanism which will be described later is provided at a vacuum drum (sticking drum). ) 1
Delivered to 8. Label 2a is the vacuum drum 18
While being sucked and held by the label sucking pad 16 and transferred, glue (adhesive) is applied to the back surface of the label sucking pad 16 by the gumming roller 20 provided adjacent to the vacuum drum 18. On the other hand, the container B is placed on the container table of the rotary table 22 and rotatably conveyed, and at the sticking position P, the label 2a is stuck by the vacuum drum 18. The configuration in which the back surface of the label 2a is glued is not limited to the one using the above-mentioned gaming roller 20,
For example, gluing may be performed by gluing the surface of a picker (label take-out means) and adhering the label with this picker to take it out. Alternatively, an adhesive that exerts an adhesive force by the action of heat may be pre-labeled. It may be a heat-sensitive labeler or the like applied to the back surface of the.

A marking checker 26 is provided on the outer side of the delivery roller 12 downstream of the marking device 14 to confirm whether printing is performed clearly and at an accurate position. Further, outside the vacuum drum 18, a label sensor 28 is provided on the downstream side of the delivery position U where the delivery roller 12 delivers to the vacuum drum 18, and whether the label cutting position is accurate or not is determined. In addition to the detection, the label on the joint of the strip-shaped label 2 is detected. Further, a fork 24 is provided at the label take-out position T on the vacuum drum 18 downstream of the pasting position P.
Is fixedly placed.

Next, the structure of the vacuum drum 18 will be described with reference to FIG. Holes 30 formed in the base 30
A cylindrical body 34 is inserted into the inside of a and is vertically fixed via a support plate 32 on the base 30. A rotary shaft 40 is rotatably supported in the cylindrical body 34 via bearings 36 and 38 arranged vertically. At the lower end of the rotating shaft 40 protruding below the cylindrical body 34, a mounting member 42 is attached.
The gear 44 is fixed via the gear 44, and the gear 44 meshes with a drive gear (not shown) to rotate the rotary shaft 40.

A fixed valve member 46, which will be described in detail later, and two plates, which are partition members 48, are fixed to the outer periphery of the upper end portion of the cylindrical body 34 by stacking them vertically. A cylindrical member 50 is disposed between the partition member 48 and the support plate 32 on the base 30 so as to surround the cylindrical body 34.
The upper partition member 48, the lower support plate 32, the inner cylindrical body 34, and the outer cylindrical member 50 form a vacuum chamber 52. In the vacuum chamber 52, a vacuum pipe 55 connected to the vacuum source V is installed.
Is open.

A rotating body 56 is fixed to the outer periphery of the upper end portion of the rotating shaft 40 projecting upward from the cylindrical body 34, and is integrally rotated by the rotation of the gear 44. The rotating body 56 includes an inner peripheral tubular portion 56a fitted and fixed to the outer periphery of the upper end portion of the rotary shaft 40, a horizontal disc portion 56b provided on the outer periphery of the lower portion of the inner peripheral tubular portion 56a, and a horizontal disc portion 56b. An outer peripheral cylindrical portion 56c formed upward is provided on the outer peripheral edge of the. A plurality of (six in this embodiment) label suction pads 16 for suction-holding the label 2a are arranged outside the outer peripheral cylinder portion 56c at equal intervals in the circumferential direction. These label suction pads 16 are supported by columns 60 fixed on the horizontal disk portion 56b and can be moved forward and backward in the radial direction.

A structure for moving the label suction pad 16 forward and backward will be described with reference to FIGS. A support block 62 is fixed on the column 60. The label suction pad 16 is connected to a moving body 66 located on the inner peripheral side of the support column 60 by two guide pins 64 slidably supported inside the support block 62. Mobile unit 6
6 is urged toward the center of the rotating body 56 by a spring 68 arranged between the hole 62a formed in the support block 62 and the front surface (surface on the outer peripheral side) of the moving body 66, Normally, the attachment member 58 on the back side of the label suction pad 16 comes into contact with the front surface of the support block 62 and is stopped. A cam follower 70 is attached to the inner peripheral side of the moving body 66 and engages with a cam plate 72 arranged around the inner peripheral cylindrical portion 56a of the rotating body 56. The cam plate 72 has the shape shown in FIG. That is, the vicinity 72a of the delivery position U where the label suction pad 16 receives the label 2a from the delivery roller 12 described above.
Has a large diameter over a predetermined angle, and the vicinity 72b of the sticking position P where the label 2a is stuck on the container B has a large diameter over α degrees shown in FIG. In the large diameter ranges 72a and 72b, the label suction pad 16 is pushed out toward the outer peripheral side of the rotating body 56 via the cam followers 70.

The label suction pad 16 is provided with a plurality of pores 16a and 16b which are open on the front surface thereof. In this embodiment, three label suction pads 16 are provided in the front side in the rotation direction (shown on the right side in FIG. 2) and three pieces are provided in the back side in the rotation direction (shown on the left side in the same figure) vertically. There is. Inside each label suction pad 16, there are longitudinal passages 16c, 16 on the front side and the rear side in the rotation direction.
d is formed, and the pores 16a and 16b of each set communicate with each other. The longitudinal passage 16c on the front side in the rotation direction is connected via a tube 73 to a vertical hole 56d formed in the horizontal disc portion 56b of the rotating body 56. Further, the vertical passage 16d on the rear side in the rotational direction communicates with the radial passage 56e formed in the horizontal disc portion 56b. Further, on the surface of the label suction pad 16, two horizontal grooves 16e which are parallel to each other and are vertically displaced from the pores 16a and 16b are provided. These horizontal grooves 16e match the heights of the two claws of the fork 24, and when the label suction pad 16 is pushed out by the cam plate 72,
The claw of the fork 24 is inserted into the horizontal groove 16e.

A rotary valve member 74 having substantially the same diameter as that of the fixed valve member 46 is fixed to the lower surface of the horizontal disk portion 56b of the rotary body 56 and integrally rotates. A rotary valve 76 is constituted by the rotary valve member 74 and the fixed valve member 46, and by switching the rotary valve 76, the vacuum is applied to the label suction pad 16 or the vacuum is shut off to apply the pressurized air. It has become. The upper rotary valve member 74 is
As shown in FIG. 4, circular holes 74a and 74b vertically penetrating the valve member 74 are formed at equal intervals on a small-diameter circle near the inner circumference and a large-diameter circumference near the outer circumference. ing. The circular hole 74b on the circumference close to the outer circumference corresponds to the position of the vertical hole 56d of the horizontal disk portion 56b, and is located on the front side in the rotation direction of the label suction pad 16 via the tube 73 and the vertical passage 16c. It communicates with the pores 16a. On the other hand, the circular hole 74a near the inner circumference communicates with the small hole 16b on the rear side in the rotational direction of the label suction pad 16 via the radial passage 56e of the horizontal disk portion 56b. The hole 74c shown on the innermost side in FIG. 3 is a bolt hole for fixing the rotary valve member 74 to the horizontal disc portion 56b of the rotary body 56.

As shown in FIG. 5, the lower fixed valve member 46 has various passages formed on its inner and outer circumferences. These two circles coincide with the two circles inside and outside of the rotary valve member 74 in which the circular holes 74a and 74b are formed. On the two circumferences of the fixed valve member 46,
A large number of small-diameter holes 46a, 46b are vertically formed at short intervals over about three quarters. This small diameter hole 4
The start ends (slightly right side of the upper part of the figure) of 6a, 46b correspond to the delivery position U where the label suction pad 16 of the vacuum drum 18 receives the label 2a from the delivery drum 12, and the end of the small diameter holes 46a, 46b (the figure). (Left side of the) corresponds substantially to the sticking position P where the label 2a is stuck to the container B on the rotary table 22. Further, in this end portion, the outer peripheral side small diameter holes 46b are provided more than in the inner peripheral side.
The distance between a and the pore 16b on the rear side is substantially matched. These small-diameter holes 46 a and 46 b are used as the through holes 4 of the partition member 48 fixed to the lower surface of the fixed valve member 46.
It communicates with the vacuum chamber 52 through 8a and a recess 48b on the upper surface.

Near the attachment position P of the fixed valve member 46, large diameter holes 46c and 46d are formed on the inner and outer circumferences, following the end portions of the small diameter holes 46a and 46b. The inner and outer large-diameter holes 46c and 46d are provided with a predetermined angle offset so as to match the distance between the front side pore 16a and the rear side pore 16b of the label adsorption pad 16, and the inside thereof is provided. The end is fixed valve member 46
Introduction hole 46e formed obliquely with respect to a line passing through the center of
Is in communication with. Also, these two large diameter holes 46c, 4
In 6d, the opening on the surface in contact with the rotary valve member 74 is enlarged in the circumferential direction. As shown in FIG. 2, the introduction hole 46e is connected to a pressure air supply source A and a vacuum source V via an electromagnetic valve 78 so that vacuum or pressure air can be switched and introduced.

An arcuate groove 46f is formed on the circumference of the fixed valve member 46 near the outer circumference thereof, downstream of the large diameter holes 46c and 46d. The downstream end of the arc-shaped groove 46f is opened to the outer peripheral surface of the fixed valve member 46 by a vertical hole 46g and a radial introduction hole 46h (see FIG. 6). Vacuum is always introduced in 46f. In this embodiment, the arcuate groove 46f and the large-diameter hole 46d near the attachment position P are blocked.

Further, a large-diameter hole 46i is formed on the circumference of the fixed valve member 46 near the outer periphery of the fixed valve member 46 on the downstream side of the arc-shaped groove 46f, and the fixed valve member 46 is provided with a radial introduction hole 46j. It communicates with the outer peripheral surface (see FIG. 7). The opening of the large diameter hole 46i is enlarged in the circumferential direction like the large diameter holes 46c and 46d near the attachment position P.

Next, the operation of the labeler having the above structure will be described. During the normal labeling operation, the strip-shaped labels 2 sent to the feed roller 6 via the guide roller 4 are separated by the rotary cutter 10 one by one.
It is cut into a. The mark sensor 9 controls the feed amount of the label 2 by the feed roller 6 so that each label 2a is cut at an accurate position. Labels 2a cut one by one by the rotary cutter 10
Are attracted to the delivery roller 12 and are rotatably transferred.
During transfer by the delivery roller 12, the marking device 14
The date, serial number, etc. are printed by. Thereafter, the marking checker 26 checks the marking state.

Then, the label 2a is transferred to the delivery position U.
When it reaches the position, it is delivered to the label suction pad 16 of the vacuum drum 18 which is pushed outward in the radial direction by the cam plate 72 from a slightly upstream side of the delivery position U and rotationally moves. The pores 16a and 16b in the front and rear of the label adsorption pad 16 respectively pass through the vertical passage 16c, the tube 73, and the vertical hole 56d of the horizontal disc portion 56b,
Further, through the vertical passage 16d and the radial passage 56e, the rotary valve member 74 communicates with the outer peripheral side circular hole 74b and the inner peripheral side circular hole 74a.
When 74b overlaps the small diameter holes 46a and 46b of the fixed valve member 46, the vacuum acts on the label suction pad 16 to suck the label 2a.

The vacuum drum 18 rotates, and the label 2a adsorbed on the label adsorption pad 16 becomes the label sensor 2.
When it reaches the front of 8, the sensor 28 checks whether the cutting position is correct or not a seam label. After that, the label 2a is applied with glue on the back surface by the gumming roller 20, and the sticking position P
At, it is attached to the container B conveyed by the rotary table 22. The label suction pad 16 is attached to the cam plate 72 from the slightly upstream side of the sticking position P.
The label 2a is pressed outward against the outer surface of the container B. Further, in the large diameter holes 46c and 46d near the attachment position P of the fixed valve member 46,
It is connected to the air pressure supply source A by a solenoid valve 78, and the label 2a reaching this position is blown with air to be released from the label suction pad 16 and passed to the container B side.

Marking checker 26 and label sensor 28
The label 2a is checked by means of, and if the label 2a is a non-defective product, labeling is performed by the above process, and the container B is discharged from the rotary table 22 onto a conveyor (not shown) and sent to the next process. Also,
When a marking defect is detected by the marking checker 26 or a seam label or a mark shift label is detected by the label sensor 28, a signal from the marking checker 26 or the label sensor 28 causes the defective label to reach the end of the gamming roller. 20 is retracted so that the label 2a is not glued. further,
When the label 2a reaches the sticking position P, the solenoid valve 78 is switched to apply a vacuum to the large diameter holes 46c and 46d located near the sticking position P of the fixed valve member 46. Then, the label 2a is adsorbed on the label adsorption pad 16 as it is, and the label is attached at the attachment position P.
And is rotatably transferred to the downstream side. The arcuate groove 4 on the downstream side of the large diameter holes 46c and 46d of the fixed valve member 46.
Vacuum is constantly acting on 6f, and the label 2a reaches the position of the fork 24 while being attracted to the label adsorption pad 16. Since the large diameter hole 46i is formed at this position of the fixed valve member 46 and is always open to the atmosphere, the label 2a is separated from the label suction pad 16 and the horizontal groove formed on the surface of the label suction pad 16. It is peeled off by a fork 24 having a claw at its tip inserted in 16e and accumulated.

In the labeler having the above-mentioned structure, sampling inspection is carried out regularly or irregularly with respect to the cutting state of the label 2a, the marking state, the gluing state and the like. In this case, the solenoid valve 78 is operated by operating the select switch, and the large diameter holes 46c and 46d formed in the vicinity of the attachment position P of the fixed valve member 46 are connected to the vacuum source V.
Connect to. In this state, only the strip-shaped label material 2 is sent without flowing the container. The label material 2 is the feed roller 6
It is sent to the rotary cutter 10 via the sheet, cut into the labels 2a one by one, and sucked and held by the delivery roller 12. Subsequently, at the delivery position U, the label is adsorbed to the label suction pad 16 of the vacuum drum 18 and glued by the gumming roller 20. At the attachment position P, the large diameter hole 46 of the fixed valve member 46
Since the vacuum is acting on c and 46d, label 2
"a" is adsorbed to the label adsorption pad 16 as it is, and is further sent to the take-out position T by the arcuate groove 46f in which the vacuum is constantly acting. At the take-out position T, the pores 16a and 16b of the label suction pad 16 are opened to the atmosphere, and the fork 24 is inserted into the horizontal groove 16e of the label suction pad 16 that has moved forward in the radial direction. Are taken out and accumulated. As described above, in the apparatus of this embodiment, sampling is performed automatically and stably. Also, when removing a defective label, the vacuum acting on the label suction pad 16 is released and the label 2a is peeled off. Therefore, the label 2a can be removed easily and without damage.

In the above embodiment, the fixed valve member 4
The inner and outer large-diameter holes 46c and 46d formed near the attachment position P of No. 6 are connected to the vacuum source V via the solenoid valve 78.
, And the pressure air supply source A can be switched and connected. However, the connection with the vacuum source V can be turned on and off to switch between the state in which the vacuum acts and the state in which the vacuum is open to the atmosphere. . Further, although the large diameter hole 46i provided in the label take-out position T is always open to the atmosphere, the large diameter hole 46i may be connected to the pressure air supply source A to blow out the air. In some cases, the fork 24 may be omitted. Further, in the above embodiment, the label take-out position T is provided on the downstream side of the sticking position P, but on the upstream side of the sticking position P, the label suction pad 16 can be switched and connected to vacuum and pressure air. A take-out position T can also be provided.

[0028]

As described above, according to the present invention, the label received from the label supply means is sucked by the vacuum and conveyed, and the vacuum is attached to the label suction pad for sticking to the container at the label sticking position. It is configured so that it can be switched between a working state and a vacuum cut-off state.The vacuum is cut off during normal labeling, and when the label is taken out without sticking it to the container as in sampling, the label can be placed at the label sticking position. Vacuum is applied to the suction pad to transfer the label to the downstream side and take it out.
It can be done automatically and reliably.

[Brief description of drawings]

FIG. 1 is a plan view of a labeler equipped with a label extracting device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the vacuum drum of the labeler.

FIG. 3 is a plan view showing a cross section of a part of the vacuum drum.

FIG. 4 is a plan view of a rotary valve member.

FIG. 5 is a plan view of a fixed valve member.

6 is a view in the direction of arrow VI in FIG.

7 is a cross-sectional view taken along the line VII-VII of FIG.

[Explanation of symbols]

 P Sticking position 12 Label supply means (delivery roller) 16 Label suction pad 18 Vacuum drum 20 Gluing means (gaming roller) 22 Container transport means (rotary table)

Claims (3)

[Claims] 1. A label suction device, comprising: a vacuum drum having a label suction pad for sucking and holding a label; label supply means for supplying a label to the vacuum drum; and container transport means for transporting a container to which a label is attached. The label is sucked and transferred by applying a vacuum to the pad, and the vacuum is shut off near the sticking position to stick the label pasted on the back side to the container. The label take-out device is characterized in that it can be switched between a state in which the label is activated and a state in which the vacuum is cut off, and the label can be transferred to the downstream side of the sticking position in the state where the vacuum is activated. Labeler. 2. The label take-out according to claim 1, wherein the label can be taken out from the label adsorbing pad by blocking the vacuum acting on the label adsorbing pad at the downstream side of the attaching position. Labeler equipped with a device. 3. A label suction device, comprising: a vacuum drum having a label suction pad for sucking and holding a label; a label supplying device for supplying a label to the vacuum drum; and a container carrying device for carrying a container to which the label is attached. A vacuum is applied to the pad to transfer the label, and the vacuum is shut off near the sticking position, and the label pasted on the back side is stuck to the container. The label suction pad on the drum is configured so that it can be switched between a state in which a vacuum is applied and a state in which it is shut off, and the vacuum is shut off before reaching the pasting position to enable the removal of the label. Labeler equipped with a device.