JPH0199938A - Heating equipment for heat-sensitive label - Google Patents

Abstract

PURPOSE:To make a quick adjustment of supplying heat quantity to a heat-sensitive label possible, by arranging a heat source which can move near to or move away from a thermal label, and constituting the movement of the heat source so that it can correspond with the supplying quantity for a container. CONSTITUTION:A label pasting drum 3 is located very close to a label suction drum 2, and the drum 3 pastes a label on a container 4. A movable heat source 5 is made to locate very close to the drum 3, and the movable heat source 5 is a composite device with a heater and a blower which are mounted on a truck 51 with wheels 52. On the heat source 5, a tube 54 is protruded in one direction; and from this tube 54, flame or heated air is discharged; and the opposite side of the heat source 5 is connected to a driving source such as a hydraulic jack 53, etc. Therefore, the heat source 5 is free to move quickly forward or backward by the function of the driving source. At a part of conveyor, a photoelectric tube is arranged to detect the interruption or reduction of the supply of container; and when a detecting signal is given to the driving source such as the hydraulic jack 53, etc., the hydraulic jack 53 detracts, and the heat source 5 moves away from the drum 3 corresponding with the reduction of the rotation of the drum 3 and moves near to the drum 3 corresponding with the increase of the rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a heating device for heat-sensitive labels in a labeling machine.

<Conventional technology> Some labels are called heat-sensitive labels.

This is a type of label in which the microcapsules rupture when heated, and the adhesive inside flows out.

A problem when using this type of label in a labeling machine is adjusting the container feed rate and heating time.

That is, there is no problem if the supply amount of containers to which labels are to be attached is constant, but in actual equipment, the supply amount of containers is constantly changing.

On the other hand, with thermal labels, it is necessary to apply enough heat to completely flow out the adhesive even at maximum speed, so if the supply volume decreases and the operating speed decreases, the label will be exposed to excess heat. is given.

As a result, a dangerous situation occurs in which the labels burn and emit smoke.

For this purpose, there is a mechanism that opens and closes a heater circuit installed inside the drum, but it is difficult to quickly adjust the amount of heat because the temperature of the drum does not drop quickly enough.

Moreover, once the temperature of the drum is lowered, the supply amount increases again, and when the speed increases, the heating cannot keep up, resulting in labels with insufficient adhesive strength.

OBJECTS OF THE INVENTION The present invention was made to improve the above-mentioned drawbacks, and an object of the present invention is to provide a heating device that can quickly adjust the amount of heat supplied to a heat-sensitive label.

<Configuration of the present invention> Next, one embodiment of the present invention will be described.

In the overall configuration diagram, 1 is a label holder, and a label suction drum 2 that sucks labels one by one from this holder 1 is located close to it.

Although a type that supplies already cut labels will be described, the structure of the present invention can of course also be used for a type of roll labeler that sequentially cuts and affixes uncut tapes one by one.

A labeling drum 3 is located close to the label suction drum 2, and this drum 3 is tangentially passing through a container 4.
Press the label to paste it.

A heater can also be placed inside this drum 3 to preheat the label.

For the above configuration, a publicly known configuration can be used.

Exit> Position the mobile heat source 5 close to the mobile heat source label pasting drum 3.

The mobile heat source 5 is a trolley 5 with wheels 52 as shown in FIG.
It is a combination of a heater and a blower installed in

The heat source 5 has a cylinder 54 protruding in one direction, from which fire and heated air are discharged.

On the opposite side of the truck 51 from the cylinder 54, there is a hydraulic jack 5.
3. Or connect it to a drive source such as a combination of a motor and gears or wires.

Therefore, the heat source 5 is free to move rapidly back and forth depending on the operation of the drive source.

kuha〉Movement signal When the supply of containers decreases or is interrupted, a normal labeling machine detects this condition early and gradually reduces the operating speed of the entire system (conveyor, various drums, etc.).

This operation can easily detect interruptions or decreases in the supply of containers by using known means such as installing a phototube in a part of the conveyor and emitting and receiving light a predetermined number of times.

This detection signal is input to the inverter motor used to drive the conveyor or drum to change the rotation speed.
A similar signal is given to a drive source such as the above-mentioned hydraulic jack 53.

Effect of the present invention> Then, the hydraulic jack 53 expands and contracts, and as the rotation of the labeling drum 3 decreases, the heat source 5 moves away from the drum 3.
As the rotation increases, it approaches the drum 3.

In other words, since the relationship between the two is proportional, the label that is moving at low speed is heated from a remote location.
As the speed increases, the label will be heated from nearby.

Effects of the Present Invention> Since the present invention is as described above, the following effects can be expected.

In theory, when adjusting the amount of heat, it can be easily done by changing the amount of heat from the heat source.

However, in order to apply it to an actual device, various thermoswitches and the like are required, making it complicated and expensive.

In addition, in the conventional configuration for adjusting the heating temperature of the drum, the drum has a large heat capacity, so it is not possible to quickly raise or lower the temperature in response to changes in the amount of labels supplied.

This is particularly difficult for devices that require a wide range of operational adjustment, that is, high-speed devices.

KUHA〉When moving at high speed, heat-sensitive labels require intense heating, such as spraying fire directly onto them.

Therefore, if the supply rate is not reduced as soon as the speed decreases, a dangerous situation will occur in which white smoke will be emitted.

The present invention achieves such adjustment with a simple and reliable device.

[Brief explanation of the drawing]

Claims (1)

[Claims] A heat-sensitive label heating device for pasting heat-sensitive labels on containers, which is equipped with a heat source that can approach or move away from the heat-sensitive label, and whose movement is configured to correspond to the supply amount of the container.