JPH07329933A - Label shrinking device - Google Patents

Abstract

PURPOSE:To easily adjust a heating steam nozzle position from the external in a short time in accordance with the change of a bottle on which a label should be shrunk. CONSTITUTION:A title device is provided with a conveyor 3 transporting a bottle 2 with a label mounted thereon and a shrinking tunnel 4 permitting the conveyor 3 to be passed through. Heating seam nozzles 5 are provided in the shrinking tunnel 4. The heating steam nozzles 5 can be positionally adjusted from the external so as to correspond to the shape of a bottle and the position of attaching the label.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label shrinking device for heating and shrinking a bottle provided with a label made of a heat shrinkable plastic film so that the label is heated and shrunk while being transported.

[0002]

2. Description of the Related Art A conventional label shrinking device is provided with a conveyor for carrying a bottle having a label made of a heat shrinkable plastic film, and a shrinking tunnel through which the conveyor passes. It is widely used that a heating steam nozzle is placed inside the tunnel, but since the heating steam nozzle is a fixed type, it is possible to shrink the film only at a specific bottle shape and label mounting position. Instead, if it is necessary to respond to changes in bottle shape and label mounting position, it is necessary to stop operation, dismantle the device, change the position of the heating steam nozzle and adjust it, so production in a short time It was difficult to change the breed.

[0003]

DISCLOSURE OF THE INVENTION The present invention has found a shrinking device for a label capable of solving the above-mentioned problems, and its gist is a conveyor for carrying bottles with labels attached, and shrinkage through which the conveyor passes. A tunnel is provided, and a steam nozzle for heating is arranged inside the contraction tunnel.
The heating steam nozzle relates to a label shrinking device characterized in that its position can be adjusted from the outside so as to correspond to the shape of the bottle and the label mounting position. The present invention will be described in detail below with reference to the drawings. Explained.

FIG. 1 is a schematic front view showing an example of a label shrinking device of the present invention, and FIG. 2 is a side view of an enlarged partial cross section of FIG.

The device of the present invention, as shown in FIGS.
Conveyor 3 for transporting bottle 2 with label 1 attached
And a contraction tunnel 4 through which the conveyor 3 passes,
A heating steam nozzle 5 is arranged inside the shrinking tunnel 4, and the position of the heating steam nozzle 5 can be adjusted from the outside so as to correspond to the shape of the bottle and the label mounting position. It is a shrinking device for a label.

In the present invention, the label 1 may be a heat-shrinkable plastic film which is appropriately printed and formed into a tubular shape. Examples of the heat-shrinkable plastic film include polyvinyl chloride, polystyrene and polyethylene terephthalate. It is preferable that the plastic film (1) is stretched at an orientation temperature of not less than the glass transition point and not more than the melting point.

The label shrinking device of the present invention is suitable for shrink-coating the label 1 on a plastic bottle such as a polyethylene terephthalate stretched bottle because the bottle 2 is not heated excessively because it is heated by steam. .

In the present invention, the conveyor 3 may be an ordinary belt conveyor if it is heat resistant and water resistant.
A roller conveyor can be used.

In the present invention, the shrink tunnel 4 may have a length sufficient to heat the shrink coating,
Further, in order to block the influence of the external temperature, it is preferable to use a heat insulating structure made of stainless steel covered with a heat insulating layer.

In the present invention, the heating steam nozzle 5 is, for example, as shown in FIG. 2, one in which a plurality of small-diameter holes 53 are formed in a tubular body 52 which is horizontally mounted vertically in a plurality of stages in a frame 51. Can be used. An external steam pipe is connected to the heating steam nozzle 5 via a steam flow rate adjusting valve 6 as shown in FIG. 1, so that the temperature of the contraction tunnel 4 can be adjusted.

The frame 51 to which the heating steam nozzle 5 is attached has a moving column 71 which is moved in the width direction by a screw or the like by rotating the width direction opening adjustment handle 7 as shown in FIG. 2, for example. Is attached to the worm gear by rotating the height adjustment handle 8 on the other side,
It is attached to a moving body 81 that moves in the vertical direction by a screw or the like, and the width direction and the height can be adjusted.

When changing the diameter, height, shape, or mounting position of the label 1 of the bottle 2 to which the label 1 should be shrunk, first, the height adjusting handle 8 is operated and set using a positioning gauge or the like. Steam nozzle 5 for heating to match the height
Adjust.

Similarly, with respect to the opening in the width direction, the handle 7 for adjusting the opening in the width direction is operated to adjust it to a predetermined position according to the diameter of the bottle 2. Even if the bottle 2 is changed by these operations, it is possible to easily adjust the position of the heating steam nozzle 5 suitable for the change from the outside in a short time.

Another feature of the present invention is the contraction tunnel 4
A plurality of zones 41, 42, 43 in the transport direction of the bottle 2.
By dividing into 4 zones in the shrink tunnel,
42 and 43 can be set independently.

The four temperatures in the shrink tunnel are set to the four zones.
1, 42, 43 can be independently set, as shown in FIG. 1, a plurality of heating steam nozzles 5 are provided in each zone 41, 42, 43 along the bottle 2 flow direction. A steam flow rate adjusting valve 6 that is arranged in a row and that can adjust the flow rate of each steam jet is provided.

By adjusting these vapor flow rate adjusting valves 6, the temperature conditions of the zones 41, 42, 43 of the shrink tunnel 4 can be freely set with respect to the temperature distribution in the conveying flow direction of the bottle 2, and the shrinkage characteristics It is possible to satisfactorily shrink the label 1 made of various different films to the bottle 2.

Next, the above-mentioned heating steam nozzles 5 are horizontally arranged in a plurality of stages in the vertical direction, and a steam flow rate adjusting valve 6 capable of adjusting the flow rate of each steam jet is provided so that the temperature distribution in the vertical direction in the contraction tunnel is increased. However, it is desirable to be able to adjust the shape of the label 1 and the bottle 2 according to the change in shape thereof in order to obtain a good contracted appearance.

[0018]

Industrial Applicability The present invention comprises a conveyor for carrying bottles with labels and a contraction tunnel through which the conveyor passes, and a steam nozzle for heating is arranged inside the contraction tunnel. The label shrinking device is characterized in that the position of the bottle can be adjusted from the outside so as to correspond to the shape of the bottle and the label mounting position. It is possible to easily adjust the position of the steam nozzle for heating, which can be easily adjusted from the outside, in a short time, and divide the shrinking tunnel into multiple zones in the bottle transport direction,
By allowing the temperature inside the shrink tunnel to be set independently for each zone, the temperature conditions in each zone of the shrink tunnel can be set freely, and labels made of various films with different shrink characteristics can shrink well on the bottle. It has an excellent effect that it is possible.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an example of a label shrinking device of the present invention.

FIG. 2 is a side view of the enlarged partial cross section of FIG.

[Explanation of symbols]

 1 Label 2 Bottle 3 Conveyor 4 Shrinkage tunnel 41, 42, 43 Zone 5 Steam nozzle for heating

Claims (2)

[Claims] 1. A conveyor for carrying bottles with labels attached, and a shrink tunnel through which the conveyor passes, wherein a steam nozzle for heating is arranged inside the shrink tunnel, and the steam nozzle for heating comprises A label shrinking device characterized in that the position can be adjusted from the outside so as to correspond to the shape and the label mounting position. 2. The label according to claim 1, wherein the contraction tunnel is divided into a plurality of zones in the bottle conveying direction so that the temperature inside the contraction tunnel can be set independently in each zone. Shrink device.