JPS59221236A - Method of labelling corrugated cardboard sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying labels to corrugated cardboard sheets.

Single-faced corrugated sheets and composite double-sided corrugated sheets manufactured using single facers and other double facers on a series of corrugator lines are cut into a predetermined length, and after being subjected to various processing such as printing and folding in the box manufacturing process, the products are made into products. The IC is now shipped to users. The above-mentioned box manufacturing process generally involves fully automatic processing of printing → lining → slot 1 processing (or punching with a die cutter) → gluing → folding, for example, by flexo folder gluer bag stamping. However,
Most of the printing in the box manufacturing process is done by flexographic printing in order to avoid a decrease in the compressive strength of the corrugated board sheet 1- caused by printing pressure. This flexographic printing has the advantage that since the printing pressure is small, there is no decrease in the compressive strength of the corrugated board sheet 1~, and that quick-drying ink can be used, so productivity can be improved. However, on the other hand, gravure printing and off-sera 1~
The drawback is that it is not possible to produce beautiful, complex, high-precision printing like printing.

However, as there has recently been an increasing trend to make corrugated cardboard sheet packages fashionable and to use the packages themselves as advertising media, there has been an increasing demand for decorative printing on corrugated cardboard sheets. In order to meet these diverse user needs, a generally known labeling method is to apply decorative printing to a label in advance using an offset printing machine or the like, and then glue and adhere the label to a cardboard sheet. ing. Please note that this labeling is
It should be noted that the label is not a complete replacement for the above-mentioned flexographic printing on the corrugated cardboard sheet 1-, but the above-mentioned label is attached to the necessary margins of the corrugated cardboard sheet 1- which has been flexographically printed in the conventional manner. Should.

By the way, the conventional method of pasting labels is to feed a label with decorative printing on the top surface to a rotating drum during a box manufacturing process in which a corrugated cardboard sheet is subjected to a series of processes such as printing, adding lines, slotting, and folding. The tip of the label is captured by a claw provided on the rotary drum and wound around the circumferential surface of the drum, and then the label is attached to the lower surface of the corrugated board sheet 1-. However, with this label pasting method, it is difficult to adjust the timing at which the tip of the label is captured by the claws provided on the drum, and furthermore, the drum is fed from the upstream side in parallel with the timing at which the label is captured. Since it is also necessary to set the appropriate timing for attaching the label to the cardboard sheet 1-, the difficulty is doubled. For this reason, in continuous labeling work, the occurrence of defective products due to label capture errors has become a problem. In addition, the conventional mechanism often causes an accident in which the label glued on the drum is stuck to the circumferential surface of the drum, making it impossible to adhere the label to the corrugated cardboard sheet.

The present invention has been devised in view of the above-mentioned drawbacks inherent in the prior art method of attaching labels to cardboard sheets I-, and has been devised to overcome these drawbacks, including the difficulty in adjusting the timing of label capture. The purpose of gluing is to avoid the inconvenience of a later label being stuck to the circumferential surface of the drum, and to contribute to improving the efficiency of labeling work.

Therefore, in order to achieve the above object, the method of attaching labels to corrugated cardboard sheets according to the present invention involves stacking and storing a large number of labels with decorative printing on the downstream side of the printing unit, and from this storage location, the labels are printed on the printed surface. The label is printed on a rotary cylinder that is rotatably disposed in a corrugated sheet supply path located on the downstream side of the printing unit and that is configured to perform vacuum suction from the outer peripheral surface of the cylinder. After the label is suction-wound on the surface side and glued on the back side of the label suction-wound on the rotary cylinder, the label is transferred onto an endless belt wound between the rotary cylinder and the idler roll. The pasting is performed by transporting the corrugated paperboard sheet with its surface facing upward along the supply path, and placing the label at a predetermined position on the corrugated paperboard sheet that arrives along the supply path after printing in the printing unit 1- is completed. It is characterized by being glued.

Next, the method for attaching labels to corrugated cardboard sheets according to the present invention will be described in detail below with reference to the accompanying drawings, illustrating an example of an apparatus suitably used to carry out this method. . FIG. 1 schematically shows a device preferably used for carrying out the labeling method according to the present invention, arranged downstream of a flexographic printing device equipped with a corrugated sheet feeding mechanism. A label pasting device 20 is disposed downstream of a flexo printing device 24 equipped with a corrugated sheet supply mechanism 22. That is, a parallel rail 28 is laid horizontally on a concrete floor surface 26'' in a factory, etc., and a
A feeding mechanism 22 . A flexographic printing device 24 and a device 20 for carrying out the labeling method according to the invention are arranged one after the other. Note that both the corrugated sheet supply mechanism 22 and the flexo printing device 24 have known configurations, and in the former mechanism 22, the corrugated sheets 1 to 34 stacked on the table 32 are placed in a stacked manner on the table 32. ) is sent out one by one from the bottom layer.

The paper is horizontally supplied to the flexo printing apparatus 24 on the downstream side via a pair of upper and lower paper feed belts 36 that are rotatably arranged. The flexo printing device 24 includes a plate cylinder 38 having a printing plate attached to its circumferential surface, and an impression cylinder 40 facing the plate cylinder 38 with a slight gap therebetween. and anilox roll 46, and a certain amount of ink is squeezed between the plate cylinder 3
8 to the printing plate (not shown), and the cardboard sheet 3
4 is now flexo printed.

The illustrated flexo printing apparatus 24 employs a so-called bottom surface printing method in which the plate cylinder 38 is located below the impression cylinder 40 and prints on the lower side of the corrugated board sheets 1 to 1. Further, although the configuration is shown as a configuration intended for monochrome printing by one printing unit 1-, a plurality of printing units may be arranged in series to perform multicolor printing.

A label pasting device 20 disposed downstream of the flexographic printing device 24 is configured to print labels 4 on which decorative printing has been applied in advance.
It is roughly divided into a label adhering mechanism section 50 for pasting the labels 48 onto the corrugated cardboard sheet 1-34, and a supply mechanism section 52 for feeding the labels 48 one by one. A rotating cylinder 54 having a diameter equal to the diameter of the plate cylinder 38 of the flexo printing apparatus is rotatably disposed in the label bonding machine groove 50. The position is set so that a supply path FP for printed corrugated cardboard sheets 1-34 horizontally sent out from the printing device 24 passes through. The rotating cylinder 54
As shown in FIG. 2, the vacuum chamber 56 is rotatably and airtightly connected to a conduit system 58 via a -r10-tally seal (not shown), and furthermore, this conduit system 58 is communicatively connected to a vacuum source 62 via a switching valve 60. Further, on the circumferential surface of the rotating cylinder 54, a plurality of annular grooves 64 having a predetermined width are provided at appropriate intervals in the axial direction of the cylinder. A large number of suction holes 65 communicating with the vacuum chamber 56 are provided in an appropriate pattern. An endless belt 68 is stretched between the rotating cylinder 54 and an idler roll 66, which will be described later, and the endless belt 68 is fitted into the annular groove 64. The width of the annular groove 64 is determined by the width of the endless belt 68.
The width is set to be the same as or slightly larger than the width of the Further, the depth of the groove is set to match the thickness of the endless belt 68, so that when the endless belt 68 is wound around the rotating cylinder 54, the belt surface will match the circumferential surface of the cylinder.

An idler roll 6 is provided on the downstream side of the double-sided corrugated cardboard sheet 1 and the supply path FP where the upper circumferential surface of the rotary cylinder 54 faces.
6 is rotatably disposed, and the upper circumferential surface of the idler roll 66 is positioned so as to face the double-sided corrugated paperboard sheet supply path FP. As described above, as shown in FIG. 2, a plurality of endless belts 68 are stretched in parallel over the rotating cylinder 54 and the idler roll 66 at a predetermined distance apart from each other in the axial direction. Accordingly, the group of bells 1 68 also rotate in the same direction. The endless belt 68 carries the glued label 48 on the belt surface and transports it in the running direction, as will be described later, and also assists in attaching the label to the double-sided corrugated sheet 34, so the friction coefficient It is recommended to use a synthetic resin material such as polyurethane, which has a large elasticity and is highly flexible.

Also, sandwiching the supply path FP of the double-sided corrugated pole sheet,
A press roll 70 is rotatably disposed opposite to the rotating cylinder 54, and the press roll 70 and the rotating cylinder 5
When the double-sided corrugated cardboard sheet I-34 passes between the two-sided corrugated cardboard sheets 1-34 and 4, a slight pressing force is applied to the double-sided corrugated cardboard sheet 1-34 by the press roll 7°. Furthermore, as shown in FIG. 1, diagonally below the rotating cylinder 54,
A crew pan 72 for storing liquid glue is provided, and a glue roll 7/I and a glue cutter roll 76 are rotatably housed in the group pan 72.

As described later, the gluing is done by a roll 74.

The adhesive is uniformly applied to the label 48.

Next, the label supply #i mechanism section 52 moves an elevator 78. Feed roll 80. It basically consists of an endless conveyor belt 82 and a label introduction guide 84. That is, on the left side of FIG. 1, a bit is formed below the concrete 1 floor 26, and four pillars 86 are arranged upright at each vertex of a rectangle on the bottom of the pit. Elevator 78 between
are arranged so that they can be raised and lowered horizontally. The elevator 78
The descending driving force is provided from a power motor 92 connected to the reducer 88 via bells 1 to 90. That is, the sprockets 1 to 96 are fixed to the output shaft 94 of the reducer 88, and the sprockets 98 are rotatably connected to each support column 86, and the chino 10 wound around these sprockets is
0 is driven forward and backward by the motor 92 to horizontally drive the elevator 78 up and down. elevator 7
A vacuum cup 102 for taking out labels is disposed above 8, and this vacuum cup 102 performs a so-called block motion by a drive mechanism (not shown), and sucks each label one by one from a group of stacked labels. It is designed to be supplied to a feed roll 80 which will be described later.

The feed roll 80 is composed of a pair of upper and lower rubber rolls, and two rollers 104. ]
04, and an endless conveyor belt 82 is wound around this roller 104.104. As shown in FIG. 1, the endless conveyor belt 1-82 is attached with a hook 106 for catching the rear end of the label 48, and the conveyor belt 82 is fastened at a speed lower than the label feeding speed of the feed roll 8o. is also driven at a high speed. Further, a pair of upper and lower feed rolls 106 are rotatably disposed in front of the endless conveyor belt 82 in the label sending direction, and in front of the foot rolls 106 and close to the lower surface of the rotary cylinder 54, A label introduction guide 84 is arranged. In FIG. 1, a pair of upper and lower endless belts 108, 108 disposed downstream of the idler roll 66 and along the double-sided corrugated paperboard sheet supply path FP transports the double-sided corrugated paperboard sheet 34 on which label binding has been completed to the outside. This is a sandwich conveyor for serving.

Next, the procedure and effects of implementing the method for applying labels to corrugated cardboard sheets according to the present invention using the apparatus configured as described above will be explained.

A large number of double-sided cardboard sheets 1-34 are stacked and stored on the table 32, and in the elevator 78 of the label supply mechanism, a large number of labels 48 with predetermined decorative printing on both sides are stacked. shall be taken as a thing. The double-sided corrugated cardboard sheets 34 are edged one by one from the bottom by a kicker (not shown), flexographic printing is applied to the lower surface in the flexo printing device 24, and the sheets are sent out horizontally along the corrugated sheet supply path FP and downstream. Side labeling is directed to the device 20. Further, in the label supply mechanism section 52, the uppermost labels 48 among the group of labels placed on the elevator 78 are taken out one by one by the vacuum cup 102, and are supplied to the endless conveyor bell 1-82 via the feed roll 80. be done. As mentioned above, since the running speed of the conveyor belt 1-82 is set to be higher than the delivery speed of the feed roll 8o, the labels 48 transferred onto the conveyor belt 82 by the feed roll 80 are , the rear end of the label is inevitably captured by the hook 106, and the label is sent out to the introduction guide 84 and comes into contact with the circumferential surface of the rotating cylinder 54. At this time, the rotating cylinder 54 is connected to the vacuum source, and a high vacuum state is formed in the vacuum chamber 5G. Therefore, the label 48 is wound around the circumferential surface of the cylinder 54 through the suction hole 65 while being reliably held by vacuum suction.

Then, as the cylinder 54 rotates, the glue roll 7
4, the underside of the label 48 is uniformly coated with adhesive. Next, the tip of the label 48 that has been sucked and glued onto the circumferential surface of the cylinder 54 is attached to the double-sided corrugated cardboard sheets 1 to 34 that are sent out from the flexo printing device 24.
The required pasting has arrived at the location and pasting (J-marking) is started.

At this time, an appropriate pressing force by the press roll 70 is applied to the double-sided corrugated cardboard sheet 1-34 and the label 48, making the attachment even more reliable. Further, the label 48 is
Guided by the endless bells 1 to 6 stretched between the idler roll 66 and the cylinder 54, 1iIG is reliably removed from the circumferential surface of the cylinder 54, and the bonded state with the double-sided corrugated cardboard seal 1-34 is maintained. The corrugated pole sea 1 is fed out horizontally along the supply route FP, and carried out while being held between the conveyors 108 and 108.

As described above, according to the method of the present invention, by vacuum suctioning the label through the suction hole provided in the rotary cylinder, the capture of the label in the cylinder is ensured, which is not inherent in the conventional labeling method. It is possible to eliminate the trouble and complicated mechanism of adjusting the label capture timing in an orderly manner. Furthermore, when the label wrapped around the cylinder is transferred to the double-sided corrugated sheet, it is guided by an endless belt and reliably detaches from the circumferential surface of the cylinder. It is also possible to avoid problems such as the finished label being rolled up into a cylinder as it is, resulting in failure in pasting onto the double-sided corrugated cardboard sheet. Therefore,
This significantly contributes to improving the efficiency of label binding work that is operated continuously.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a labeling device in relation to a flexo printing device, and FIG. This is a partially cutaway perspective view showing a state in which a belt is stretched between a rotating cylinder and an idler roll used in the device shown in FIG. Mr. Kazuo Wakasugi, Commissioner of the Japanese Patent Office +')
-:”Indication of fly 9 incident 1982 Patent Application No. 248835 2, Title of the invention Labeling on cardboard sheets is method 3, Relationship with the case of the person making the amendment Patent applicant address Hotoku-cho, Kita-ku, Nagoya City Address 18 Name: Isoe Iron Works Co., Ltd. Representative: Iso Eiji - 4, Agent: 〒460 (1) Official drawing 6, content of amendments (2) Attachment attached (no change in content)

Claims (1)

[Claims] A large number of labels ff1WI with decorative printing are stored on the downstream side of the printing unit, and the labels are supplied upstream one by one with the printed side facing up from this storage location, and the labels are placed on the downstream side of the printing unit 1. The printing surface side of the label is suction-wound around a rotary cylinder that is rotatably arranged in a corrugated sheet supply path and configured to perform vacuum suction from the outer peripheral surface of the cylinder, and the back side of the label suction-wrapped around the rotary cylinder is After gluing, the label is transferred onto an endless belt wound between the rotary cylinder and the idler roll, and the label is transported along the corrugated sheet supply path with the gluing surface facing upward. A method for applying a label to a corrugated sheet, characterized in that the label is adhered to a predetermined position of a corrugated sheet arriving along the supply path after printing in the printing unit 1- is completed.