JP3383746B2 - Label sticking device and plastic container - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label sticking device and a plastic container, and more particularly to a label sticking device capable of sticking a label on a plastic container with extremely high flatness without any wrinkles or irregularities, and such a container. Plastic container with a label The present invention relates to a plastic container with a label.

[0002]

2. Description of the Related Art Conventionally, the material of a label that is wrapped around a plastic container such as mineral water and attached is paper. Paper labels have a relatively high rigidity, so-called stiffness, and become wavy after absorbing water. Therefore, the paper label is wrapped around a prismatic plastic container with high flatness and attached. You can't find anything you can find in the market. On the other hand, a shrink label is known as a technique for attaching a plastic label to a plastic container. This requires a step of covering the plastic container with the label material before shrinking and a step of uniformly heating the whole, so when the shrink label is continuously attached to the filling process in the filling factory, the label material is covered. Since the process and the like are performed intermittently, the operating rate is reduced. In addition, when the label material is covered, there is a possibility that the label may be misaligned, and the label may not be accurately labeled on the appropriate portion of the plastic container. Further, when the shrink label is attached to the plastic container in the plastic container manufacturing plant, a heat-resistant plastic container must be used, which increases the material cost of the plastic container.

[0003]

The paper label has a big problem that it is apt to be wavy as described above, and is a poor-looking label. Further, the paper label is weak against water and is likely to be damaged by dew condensation after cooling. On the other hand, although the shrink label looks good, there is a problem that the manufacturing cost is high. In addition, when a shrink label is attached to a plastic container at a manufacturing plant, if a problem occurs in filling, the plastic container with a shrink label, which is higher than the manufacturing cost of the plastic container alone, is discarded, which is a great waste. . Furthermore, the shrink label attached to the plastic container is
There is a problem in that the edge of the shrink label is relatively difficult to remove for reuse of the plastic container because the edge of the plastic container is inserted into the recess of the plastic container.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems associated with conventional labels for plastic containers, and is a label on which a plastic label that is good-looking, water-resistant, and inexpensive to manufacture can be applied. It is intended to provide a sticking device. It is another object of the present invention to provide a label sticking device that can stick a plastic label that can be discarded with a relatively small amount of waste even when a filling failure occurs. It is another object of the present invention to provide a label sticking device which is good in appearance and can stick a convenient plastic label for material separation for reuse of a plastic container.

A further object of the present invention is to provide a plastic container having a plastic label attached as described above.

[0006]

A first aspect of the present invention is a label sticking device for sticking a plastic label to a rounded prismatic plastic container by rotating the container and applying heat to a front end portion and a rear end portion. Stick the front end of the plastic label coated with the fusible adhesive to the rounded corner of the plastic container, wrap the plastic label around the plastic container while rotating the plastic container, and then rotate the plastic container. The label sticking device sticks the plastic label on the front end of the plastic label while sucking the rear end of the plastic label by a stationary fixed suction device. A second invention is a rounded prismatic plastic container, wherein the front end of a plastic label having a front end portion and a rear end portion coated with a heat-melting adhesive is attached to the rounded corner portion of the plastic container. Then, while rotating the plastic container, the plastic label is wrapped around the plastic container, the rear end of the plastic label is attached on the front end of the plastic label, and the roundness of the portion of the plastic container to which the plastic label is attached is rounded. The radius of curvature of the corner portion having a radius of 10 to 30% of the maximum outer diameter is a plastic container.

A third aspect of the present invention is a rounded prismatic plastic container, wherein the front end of a plastic label having a front end portion and a rear end portion coated with a heat-melting adhesive is the rounded corner of the plastic container. A plastic label is wrapped around the plastic bottle while rotating the plastic container, and then the plastic container is rotated to adsorb the rear end of the plastic label by a stationary adsorbing device while the front end of the plastic label is adsorbed. It is a plastic container with a plastic label attached thereto.

An embodiment of the third aspect of the invention is characterized in that the radius of curvature of the rounded corner portion of the plastic container to which the plastic label is attached is 20% to 30% of the maximum outer diameter. In the above embodiment, when the plastic label adsorbed on the vacuum drum is attached to the plastic container, in the cylindrical container, the plastic label is attached while the cylindrical container and the vacuum drum are always in contact with each other. The rounded corner portion is pressed to the vacuum drum, that is, the portion of the plastic label to which the heat-melting adhesive is applied, and the area to be attached becomes small, making high-speed plastic label attachment impossible. Therefore, when a plastic label is attached to a corner of a plastic container having a radius of curvature smaller than 10% at a high speed, there is a possibility that the plastic label may be attached from a predetermined position, or the plastic label may be wrinkled. .

On the other hand, in the locator for holding the plastic container and rotating it about the vertical axis, the plastic container is held with some clearance in order to insert and remove the plastic container at high speed and efficiently. Therefore, when the radius of curvature of the rounded corner portion of the plastic container where the plastic label is attached is larger than 30% of the maximum outer diameter, the plastic container is held displaced from the predetermined position / direction of the locator. There is a possibility that the corners of the plastic container may come into contact with the plastic label with a little delay or sooner than the locator, and the plastic label may not be attached at a predetermined position of the plastic container.

[0010]

EXAMPLE A label sticking apparatus according to an example of the present invention will be described with reference to the drawings. The label for the 500 ml capacity plastic container used here is a stretched plastic label with a total length of 210 mm, and the front and rear ends of the back surface each have 15
The heat welding adhesive is applied in a width of mm. As shown in FIG. 1, the label sticking device 1 has an auto-splicer 14 that continuously supplies a label strip 10 on which labels L are continuously formed from a roll 12. Auto splicer 1
The label strip 10 supplied from No. 4 is the feed roll 20.
The feeding speed is controlled by the delivery roll 2, which is cut into a predetermined size by the cutter 24 and is rotated.
Adsorbed on 2. The cut label L is transferred from the delivery roll 22 to the vacuum drum 30 and is adsorbed with the back surface facing outside. The adhesive applied to the label L adsorbed on the vacuum drum 30 held at a predetermined temperature is
Hot air is blown from the hot air blower 36 and melted.

As shown in FIGS. 2 and 3, the plastic container B has a capacity of 500 ml, a maximum outer diameter of a portion to which the label L is attached is about 65 mm, and a corner radius of curvature is 16.5 mm. is there. The plastic containers B are sequentially supplied on the supply conveyor 50, and are individually supplied to predetermined positions of the labeler main body 54 by the inlet star wheel 52. In the labeler main body 54, the plastic container B held by the locator 58 is transferred in the circumferential direction while being rotated around its vertical axis, and the corner portion at the outermost position is attracted to the vacuum drum 30. The leading end of the label L is brought into contact with the leading end of the back surface of the label L and adhered to the corner. After that, the plastic container B is transferred in the circumferential direction while being rotated about its vertical axis. Immediately after the labeler body 54 separates from the vacuum drum 30, the stationary label adsorber 60 is arranged to weakly adsorb the label L separated from the vacuum drum 30. The label L is pulled by the plastic container B that is being transported in the circumferential direction while rotating on its axis, is weakly adsorbed on the stationary label adsorber 60, and slides while maintaining the horizontal position.

The label L goes around the circumference of the plastic container B, and the rear end portion of the back surface of the label L separated from the stationary label suction device 60 reaches the above-mentioned corner portion to which the front end portion of the back surface of the label L is attached. The rear end is attached near the front end of L. The width of the adhesive applied to the rear end of the label L is determined so that the width extends over both the front end of the label L and the surface of the plastic container B. Both are securely attached to the plastic container B. A plurality of brushes 66 are arranged around the labeler main body 54, and the label L attached to the plastic container B is pressed while sliding. A CCD image pickup device 80 is arranged near the discharge end of the labeler body 54, and a label inspection for detecting a positional deviation between the front end and the rear end of the label L attached to the plastic container B by the output of the CCD image pickup device 80. Device (not shown).

The plastic container B to which the label L is attached in the labeler body 54 is transferred to the outlet star wheel 82. A label defect eliminating device 84 that operates by the output of a label inspecting device (not shown) is arranged on the outlet star wheel 82, and the plastic container B with the label L attached at a predetermined position is sent to a non-defective product conveyor 86.
The plastic container B in which the label L is not attached at a predetermined position is sent to the defective product conveyor 88.

[Brief description of drawings]

FIG. 1 is a plan view of a label sticking apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the plastic container of the embodiment of the present invention.

FIG. 3 is a plan view of the plastic container of the embodiment of the present invention.

[Explanation of symbols]

L label B plastic container 1 Labeling device 10 label strips 12 rolls 14 Auto splicer 20 feed rolls 22 Delivery Roll 24 cutter 30 vacuum drums 36 Hot air blower 50 supply conveyor 52 entrance star wheel 54 Labeler body 58 locator 60 static label adsorber 66 brushes 80 CCD imager 82 exit star wheel 84 Label defect elimination device 86 Good product conveyor 88 defective product conveyor

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shingo Hirano 1-5-7 Mikitei-cho, Higashiosaka-shi, Osaka House Food Co., Ltd. (56) Reference JP-A-8-104312 (JP, A) JP Flat 7-84524 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65C 3/12 B65D 25/20 B65D 23/00 B65D 1/02

Claims (4)

(57) [Claims] 1. A label sticking device for sticking a plastic label to a rounded prismatic plastic container by rotating the container, the plastic label having a front end portion and a rear end portion coated with a heat-melting adhesive material. Affix the front end of the to the rounded corner of the plastic container, and wrap the plastic label around the plastic container while rotating the plastic container,
A label sticking device which sticks on the front end of a plastic label while continuously rotating the plastic container to suck the rear end of the plastic label by a stationary fixed suction device. 2. A prismatic plastic container having a roundness, wherein the front end of a plastic label having a front end portion and a rear end portion coated with a heat-melting adhesive is attached to the rounded corner portion of the plastic container. And wrap the plastic container around the plastic container while rotating the plastic container,
The rear end of the plastic label is pasted on the front end of the plastic label, and the radius of curvature of the rounded corner of the plastic label of the plastic container is 10% to 30% of the maximum outer diameter. A plastic container characterized by being. 3. A round prismatic plastic container having a rounded corner portion of the plastic container, the front end portion of a plastic label having a front end portion and a rear end portion coated with a heat-melting adhesive material. Then, while the plastic container is being rotated, the plastic label is wrapped around the plastic bottle, and while the plastic container is being rotated, the rear end of the plastic label is adsorbed by the stationary adsorbing device which is stationary, while being placed on the front end of the plastic label. A plastic container with a plastic label, which is affixed. 4. The radius of curvature of the rounded corner portion of the plastic container where the plastic label is attached is:
The plastic container according to claim 3, wherein the maximum outer diameter is 10% to 30%.