JPH11301628A - Method for sensing adhesive amount, method for sticking label, adhesive amount sensor and label sticking apparatus. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sense whether an adhesive amount is appropriate at the time of sticking a label to an object. SOLUTION: Application rollers 13, 14 sequentially come into contact with a label 23 held on a label holding part 2 of a label transfer means 3, and adhesive is applied. Then a light emitting element 24 sheds light to an adhesive face 23a of the label 23, and its reflected light radiates as an incident beam to a light receiving element 25. Strength of light received by the light receiving element 25 is sensed, thereby making an attenuation amount at the time of passing through an adhesive layer known. The attenuation amount provides thickness of the adhesive layer and an adhesive amount. If the adhesive amount is appropriate, when the label 23 comes into contact with a beer bottle 17, suction of the label transfer means 3 is canceled whereby the label 23 is stuck to an outer periphery of the beer bottle 17 via the adhesive. If the adhesive amount is not appropriate, an alarm is issued and also sticking operation is suspended.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of detecting the amount of an adhesive for judging whether or not the amount of an adhesive for applying a label to a food or drink container is appropriate, and a method for attaching a label. The present invention relates to a method, an adhesive amount detection device, and a label sticking device.

[0002]

2. Description of the Related Art Usually, a label indicating the kind of contents, a trade name, a raw material, a name of a manufacturing company, and the like is attached to a container for food and drink, for example, a beer bottle with an adhesive. In the sticking step, unsticked labels that are sequentially conveyed are cut one by one, coated with an adhesive by a coating roller, and then bonded to a container.

[0003]

When the label is attached to the container, if the amount of the adhesive is too large, the excess adhesive may protrude from the label and stick to another adjacent container. Furthermore, in this case, when peeling off the attached containers, there is a possibility that the label already adhered may be peeled off or the container itself may be damaged. On the other hand, if the amount of the adhesive is too small, the adhesive strength of the label is low, so that the label may be easily peeled off when a slight external force or moisture is applied to the container. For example, if a beer bottle is immersed in cold water for cooling, the label may be peeled off.

Accordingly, an object of the present invention is to provide a method for securely and safely attaching a label to an object to be attached such as a container for food and drink.
An object of the present invention is to provide an adhesive detection method and apparatus for detecting whether the amount of an adhesive is appropriate, and to provide a label attaching method and apparatus using such an adhesive detection method and apparatus.

[0005]

A feature of the present invention is a method of detecting the amount of an adhesive when a label is adhered to an object to be adhered by using an adhesive. The step of applying the adhesive of a color different from the color of, and irradiating the sticking surface of the label coated with the adhesive with light to receive the reflected light, the attenuation amount of the reflected light Detecting the amount of the adhesive.

Another feature of the present invention is a label sticking method for sticking a label to an object to be stuck using an adhesive, wherein the label sticking surface has a color different from the color of the sticking surface. A step of applying an adhesive, irradiating the adhesive surface of the label with the adhesive with light to receive the reflected light, and detecting the amount of the adhesive by an attenuation amount of the reflected light. And a step of sequentially applying the label on which the adhesive has been applied to the adherend, and a step of detecting the amount of the adhesive, in the step of detecting the amount of the adhesive, the adhesive applied to the application surface of the label. Issuing a warning to the user if the amount is incorrect. In the step of detecting the amount of the adhesive, when the amount of the adhesive applied to the sticking surface of the label is an improper amount, the label is attached to the adherend. Controlling the sticking of the label to the object to be stuck so as to stop.

In a label sticking method for sticking a label to an object to be stuck using an adhesive, a step of applying the adhesive having a color different from the color of the sticking surface to the sticking surface of the label,
Irradiating the adhesive surface of the label with the adhesive applied with light to receive the reflected light, and obtaining a detection output in accordance with the adhesive application amount based on the amount of received light; and A step of presetting a detection output range obtained by performing the detection step when the amount of the adhesive applied to the sticking surface is within an appropriate range as comparison information, and the detection output and the comparison information. Comparing the detection output and the comparison information, and a step of obtaining the difference,
In the step of sequentially applying the label to which the adhesive has been applied, and in the comparing step, if the detection output is out of the range of the comparison information, the adhesive in the applying step based on the difference Adjusting the application amount so as to be within an appropriate range.

[0008] Still another feature of the present invention is an adhesive amount detection device for detecting the amount of adhesive when a label is adhered to an object to be adhered using an adhesive. Adhesive applying means for applying the adhesive of a color different from the color of the adhesive surface, and an optical sensor for irradiating the adhesive surface of the label with the adhesive with light and receiving the reflected light And control means for detecting the amount of the adhesive based on the output level of the reflected light sent from the optical sensor.

Still another feature of the present invention is a label sticking apparatus for sticking a label to an object to be stuck using an adhesive, wherein a color of the sticking surface is applied to the sticking surface of the label. Adhesive applying means for applying the adhesive of a different color from the optical sensor, an optical sensor for irradiating the adhesive surface of the label to which the adhesive is applied with light and receiving reflected light thereof, and On the kimono, a sticking section for sequentially sticking the label coated with the adhesive, and detecting the amount of the adhesive based on the output level of the reflected light sent from the optical sensor, the label of the label When the amount of the adhesive applied to the sticking surface is an inappropriate amount, a control means for issuing a warning to a user is provided. Further, the control unit detects the amount of the adhesive based on the output level of the reflected light sent from the optical sensor, and the amount of the adhesive applied to the sticking surface of the label is inappropriate. When the amount is the amount, the sticking of the label to the object may be stopped.

[0010] In a label sticking apparatus for sticking a label to an object to be stuck using an adhesive, an adhesive in which a color different from the color of the sticking surface is applied to the sticking surface of the label. Agent applying means, an optical sensor that irradiates light to the sticking surface of the label to which the adhesive has been applied and receives reflected light thereof, and the object to be adhered to which the adhesive has been applied. A sticking unit for successively sticking a label, and a detection output corresponding to the amount of the adhesive applied is obtained based on an amount of the reflected light received from the optical sensor, and the detection output is attached to the label. Compared with comparison information indicating the detection output range when the amount of the adhesive applied to the surface is within an appropriate range,
A difference between the detection output and the comparison information is obtained, and when the detection output is out of the range of the comparison information, the adhesive application amount in the application step is within an appropriate range based on the difference. And control means for adjusting the speed of the vehicle.

[0011] According to such a configuration, the amount of the adhesive can be detected in a non-contact manner, whereby the label can be easily and securely applied to the adherend with an appropriate amount of the adhesive. .

When the adhesive applying means has an applying roller and the adhesive is applied to the sticking surface of the label by the applying roller, the application of the adhesive is made uniform.

Further, if the color of the adhesive surface and the color of the adhesive have a large difference in the reflection characteristic with respect to the light irradiated to the adhesive, the accuracy of detecting the amount of the adhesive is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a main part of a label sticking apparatus according to the present invention. This label sticking apparatus includes a label supply unit 1, a cutting unit 29, a label conveying unit 3, an adhesive applying unit 4, an optical sensor 5, and an adhered object conveying unit 6.

The label supply means 1 includes rollers 7, 8, 9,
10 and the like, and stably supplies a label 23 which is connected to one sheet in an uncut state. The cutting means 29
The labels 23 supplied from the label supply means 1 are cut and separated one by one by a cutter (not shown),
The cut label 23 is placed on the label holding unit 2 described later. The label transporting means 3 has a plurality of label holding units 2 on the outer periphery, and can suck and hold the label 23 placed on each label holding unit 2 and can rotate.

The adhesive applying means 4 includes an adhesive tank 11 in which an adhesive 15 (see FIG. 2) is stored, an intermediate roller 12 to which the adhesive 15 in the adhesive tank 11 is attached to an outer peripheral portion, A pair of application rollers 1 for transferring the adhesive 15 on the outer periphery of the intermediate roller 12 to the label 23 on the label holding unit 2
3 and 14. FIG. 2 shows the cross-sectional shapes of the application rollers 13 and 14 and the adhesive 15 applied to the label 23 by the application rollers 13 and 14. FIG.
As shown in (a) and (b), grooves 13a and 14a for preventing the label 23 from sticking to the application rollers 13 and 14 are formed on the outer periphery of the application rollers 13 and 14. However, the groove portions 13a, 1 of both application rollers 13, 14
4a are formed at the same position, the two application rollers 1
Even when the adhesive 15 is applied to the label using the labels 3 and 14, there are portions where the adhesive 15 does not exist. Therefore, the positions of the groove portions 13a and 14a of both the application rollers 13 and 14 are slightly shifted. As a result, as shown in FIG. 2C, the adhesive 15 is applied to the entire surface of the label 23 by both application rollers 13 and 14. However, the label 23 has an adhesive 1
There are 5 irregularities, and there are a double-applied portion (shown by cross-hatching) and a once-applied portion (shown by normal hatching).

The adhered object transporting means 6 includes a rotating table 16.
A plurality of holding means (not shown) provided above respectively hold and fix the adherends (beer bottles in this embodiment) 17, and rotate the rotary table 16 to sequentially transfer the beer bottles 17 ( 1 in FIG. 1). The beer bottles 17 thus transferred are simultaneously supplied to the label transport means 3.
The label 23 is adhered to the beer bottle 17 so as to face the attaching surface 23a of the label 23 transferred by the above. In addition,
Since the beer bottle 17 is circular in plan, the label 23
It is necessary to rotate the beer bottle 17 itself in order to stick the beer, and a bottle rotating means (not shown) is built in the holding means. Although not shown, the beer bottle 17 on which the label 23 has been affixed is removed from the holding means on the rotary table 16 at a position away from the label transport means 3, and the beer bottle 17 on which the label 23 has not been affixed is removed from the rotary table 16. 16
It is placed on the upper holding means. The label transport means 3 and the adhered article transport means 6 are close to each other and the label 23 on the beer bottle 17 is provided.
Is a sticking portion 18.

The optical sensor 5 includes a light emitting diode (LE)
D) and a light receiving element 25. Further, as shown in FIG. 3, the light emitting element 24 and the light receiving element 25 are connected to the control means 26. The control means 26 includes a level detection section 27, a level setting section 19, an amplifier 20, a counter 21, a warning section 22, and a sticking operation stopping means 29. The light emitting element 24 irradiates light onto the sticking surface 23a of the label 23 after the adhesive 15 is applied, and the light receiving element 25 receives the reflected light from the label 23 and outputs an output corresponding to the light intensity. It is sent to the detection unit 27. The level detector 27 determines whether or not the output level of the light receiving element 25 is within an allowable range set in the level setting unit 19 in advance. Then, when the output level of the light receiving element 25 is out of the allowable range, the level detecting section 27 outputs a detection signal. This detection signal is amplified by the amplifier 20 and sent to the warning unit 22. This detection signal is sent to the sticking operation stopping means 28. The sticking operation stopping unit 28 stops the label supplying unit 1, the label conveying unit 3, and the adhered object conveying unit 6, and stops the label attaching operation thereafter.

Next, the operation of this embodiment will be described. First, the label supply unit 1 supplies the uncut tape-shaped label 23 to the cutting unit 29. Although not described in detail, the cutting unit 29 cuts the label 23 into predetermined lengths and places the cut label 23 on the label holding unit 2 of the label transport unit. Then, a suction mechanism (not shown) of the label transporting unit 3 is operated to suck and hold the label 23 placed on the label holding unit 2. At this time, the surface exposed to the outside is the sticking surface 23a, and the display surface on which the product name or the like is printed is the surface in contact with the label holding unit 2. Then, the label transport means 3 rotates counterclockwise. With the rotation of the label transport means 3, the label 23 on the label holding unit 2 is transported.

When the label 23 reaches a position facing the adhesive applying means 4, the label 23 comes into contact with the applying rollers 13 and 14 sequentially. When the label 23 being conveyed abuts, the application roller 13,
14 rotates. Then, the adhesive 15 on the outer periphery of the application rollers 13 and 14 is transferred to the sticking surface 23 a of the label 23. The color of the sticking surface 23a of the label 23 and the adhesive 1
The color of No. 5 is the bonding surface 23a for detecting the amount of the adhesive described later.
There is a large difference in the reflection characteristics with respect to the light applied to the light. That is, the adhesive surface 23a has a color that reflects the irradiated light without absorbing much, and the adhesive 15 has a color that absorbs the irradiated light well.

Subsequently, when the label 23 is conveyed and reaches a position facing the optical sensor 5, the light emitting element 24 irradiates the sticking surface 23a of the label 23 with light as shown in an enlarged view in FIG. Then, light reflected by the attaching surface 23a enters the light receiving element 25. In the present embodiment, the light emitting element 24 is a red LED (light emitting diode), the color of the sticking surface 23a of the label 23 is white, and the color of the adhesive 15 is blue or black. The red light radiated toward the label 23 passes through the layer of the blue or black adhesive 15, and the white sticking surface 2
The light is reflected at 3a, passes through the adhesive 15 again, and enters the light receiving element 25. When passing through the layer of the blue or black adhesive 15, the red light is partially absorbed, attenuated, and reaches the light receiving element 25. Since the degree of absorption and attenuation varies depending on the thickness of the adhesive 15, the light receiving element 2
By detecting the intensity of the light received at 5, the thickness of the adhesive 15 can be determined. Further, in the present embodiment, since the adhesive 15 is applied using the application rollers 13 and 14, the layer thickness and the amount of the adhesive 15 are proportional. Therefore, the amount of the adhesive 15 can be obtained from the intensity of the light received by the light receiving element 25. Specifically, as shown in Table 1, the relationship between the light receiving level and the amount of the adhesive 15 is checked in advance.

[0023]

[Table 1] Then, an allowable range of the output level from the light receiving element 25 is set according to the amount of the adhesive 15 suitable for sticking the label 23 to the beer bottle 17 and stored in the level setting unit 19. For example, when the amount of the adhesive 15 for performing proper bonding is 0.18 ± 0.02 g, it is necessary from Table 1 that the output level of the light receiving element 25 needs to be within the range of 1012 to 900. Recognize. Therefore, the light emitting element 24
To the label 23 and determine whether the output level when the reflected light is received by the light receiving element 25 is within the set allowable range (1012 to 900). If it is within this range, the label detection step at the subsequent stage is performed without the level detection unit 27 outputting the detection signal. In this embodiment, since two application rollers are provided, two optical sensors 5 each including a light emitting element 24 and a light receiving element 25 are also provided. The other optical sensor 5 is provided so as to detect the amount of adhesive in the portion where the adhesive 15 is applied by the application roller 14 and to detect the amount of adhesive in the portion where the adhesive 15 is applied.

When the light receiving level of the light receiving element 25 is within an appropriate range, it is determined that the amount of the adhesive 15 is appropriate. Then, the rotation of the label transport means 3 continues, and the label 23 on the label holder 2 is transported to a position facing the adhered article transport means 6. Then, when the label 23 comes into contact with the outer periphery of the beer bottle 17, the label conveying means 3 releases the label 23 from being attracted. Since the label conveying means 3 and the beer bottle 17 rotate with respect to each other, the label 23 is stuck by the adhesive 15 so as to wind around the outer periphery of the beer bottle 17 with the rotation. It should be noted that the rotation of the label transporting means 3 and the release of the suction and the rotation of the adhered article transporting means 6 are synchronized so that the label 23 is attached to an appropriate position of the beer bottle 17. Thus, the label 23 is attached to the beer bottle 17.

On the other hand, in the optical sensor 5, the light emitting element 2
4 is emitted toward the label 23 and the output level when the reflected light is received by the light receiving element 25 is determined to be outside the set allowable range (1012 to 900). 2 outputs a detection signal. This detection signal is amplified by the amplifier 20 and sent to the warning unit 22. When the warning unit 22 receives the amplified detection signal, the amount of the adhesive may be inappropriate for the user by an auditory means such as sounding a warning buzzer or a visual means such as turning on a warning lamp. Warning that there is. The detection signal transmitted from the level detection unit 24 is supplied to the counter 21. And the counter 21
Counts the number of occurrences of defects. In addition, amplifier 2
The detection signal amplified by 0 is applied to the sticking operation stopping means 28.
Sent to The sticking operation stopping means 28 includes the label supplying means 1, the label conveying means 3, and the adhered article conveying means 6.
Is stopped, and the subsequent label sticking operation is stopped.

In the control means 26 shown in FIG.
The level detector 27 has been described as having a function of determining whether or not the output level from the light receiving element 25 is within a preset allowable range, but is not limited to this type. For example, a type that outputs difference information of an output level (detection output) from the light receiving element 25 with a preset allowable range (comparison information indicating an appropriate detection output range) can be used. In this case, the control unit 26 can control the adhesive application unit 4 based on the difference information, and can automatically control the adhesive application amount to be within an allowable range.

In this embodiment, since two optical sensors 5 are provided, two control means 26 are provided independently for each optical sensor 5, and the warning of the warning section 22 is given by the application roller. 13 and 14 are distinguished depending on which of the adhesive application amounts is defective. In addition, the counter 21 determines the number of failures in the adhesive application amount of the application roller 13,
The number of failures in the amount of adhesive applied to the application roller 14 is counted separately. However, the present invention is not limited to such a configuration.
It is also possible to simplify the configuration by not distinguishing which adhesive application amount is defective.

The adhesive 15 is applied to the application rollers 13 and 14.
The adhesive 15 is appropriately replenished from the adhesive tank 11 to the outer peripheral portion of the intermediate roller 12 that supplies the adhesive.

The sticking operation stopping means 28 in the description of the abnormality is not limited to a structure specially provided for stopping the sticking operation. It may be one that only sends a signal for turning off the drive source (motor or the like) of the kimono transporting means 6.

As shown in Table 1, in the present embodiment, it seems that the amount of the adhesive is detected based on the output level of the light receiving element 25.
The amount of adhesive is detected based on the difference from the output level when 5 does not exist (when the amount of adhesive is 0.00 g), that is, the amount of attenuation due to the adhesive. In this embodiment,
To improve work efficiency, the process of calculating the amount of attenuation based on the output level is omitted by devising the calculation process and setting the reference level, but the original technical idea is that the light The purpose is to detect the amount of adhesive from the amount of attenuation.

[0031]

According to the present invention, by detecting the amount of the adhesive applied to the label, the amount of the adhesive is not appropriate, so that the label sticking is unreliable and easily peeled off, and the excess adhesive is protruded. Can be prevented from being adhered to other members or other objects to be adhered, and reliable labeling can be performed.

Further, since the amount of the adhesive is detected by an optical method, there is no direct contact with the adhesive or breakage of the label or the object to be adhered, so that the operation is simple and safe. It can be easily performed as a part of the label attaching step.

[Brief description of the drawings]

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

FIG. 2 is an explanatory view showing a state in which an adhesive is applied to a sticking surface of a label.

FIG. 3 is a block diagram showing control means of the label sticking apparatus shown in FIG.

FIG. 4 is an enlarged explanatory view showing a step of receiving light reflected by a label sticking surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Label supply means 2 Label holding part 3 Label conveyance means 4 Adhesive application means 5 Optical sensor 6 Adhered material conveyance means 7, 8, 9, 10 Roller 11 Adhesive tank 12 Intermediate rollers 13, 14 Application rollers 13a, 14a Groove part DESCRIPTION OF SYMBOLS 15 Adhesive 16 Rotary table 17 Beer bottle (adhered material) 18 Adhering part 19 Level setting part 20 Amplifier 21 Counter 22 Warning part 23 Label 23a Adhering surface 24 Light emitting element 25 Light receiving element 26 Control means 27 Level detecting part 28 Adhering Wearing operation stopping means 29 Cutting means

Claims (10)

[Claims] 1. A method for detecting an amount of an adhesive when a label is attached to an object to be attached using an adhesive, wherein the adhesive having a color different from the color of the attached surface is attached to the attached surface of the label. Applying an agent, and irradiating the adhesive surface of the label with the adhesive with light to receive the reflected light, and detecting the amount of the adhesive based on the amount of attenuation of the reflected light. And a method for detecting the amount of adhesive. 2. The method according to claim 1, further comprising a step of applying the adhesive to the sticking surface of the label by an application roller. 3. The color of the adhesive surface and the color of the adhesive,
The method for detecting an amount of an adhesive according to claim 1, wherein a difference in reflection characteristics with respect to light applied to the attachment surface is large. 4. A label sticking method for sticking a label to an object to be stuck using an adhesive, wherein the adhesive having a color different from the color of the sticking surface is applied to the sticking surface of the label. Irradiating the adhesive surface of the label to which the adhesive has been applied with light to receive the reflected light, and detecting the amount of the adhesive by the amount of attenuation of the reflected light; In the step of sequentially applying the label on which the adhesive has been applied to the adherend, and in the step of detecting the amount of the adhesive, the amount of the adhesive applied to the application surface of the label is inappropriate. Issuing a warning to the user if the amount is too large. 5. A label sticking method for sticking a label to an object to be stuck using an adhesive, wherein the adhesive having a color different from the color of the sticking surface is applied to the sticking surface of the label. Irradiating the adhesive surface of the label to which the adhesive has been applied with light to receive the reflected light, and detecting the amount of the adhesive by the amount of attenuation of the reflected light; In the step of sequentially applying the label on which the adhesive has been applied to the adherend, and in the step of detecting the amount of the adhesive, the amount of the adhesive applied to the application surface of the label is inappropriate. If the amount is an appropriate amount, so as to stop the sticking of the label to the adherend, a step of controlling the sticking of the label to the adherend, the step comprising: Sticking method. 6. A label sticking method for sticking a label to an object to be stuck using an adhesive, wherein the adhesive having a color different from the color of the sticking surface is applied to the sticking surface of the label. Irradiating the adhesive surface of the label to which the adhesive has been applied with light to receive the reflected light, and obtaining a detection output corresponding to the adhesive application amount based on the received light amount. A step of presetting a detection output range obtained by performing the detection step when the amount of the adhesive applied to the sticking surface of the label is within an appropriate range as comparison information; and A step of comparing the comparison information to obtain a difference between the detection output and the comparison information; a step of sequentially attaching the label on which the adhesive is applied to the adherend; and a step of comparing. The detection output is outside the range of the comparison information And adjusting the amount of the adhesive applied in the applying step based on the difference so as to be within an appropriate range. 7. An adhesive amount detecting device for detecting an amount of an adhesive when an adhesive is used to attach a label to an object to be adhered, wherein the label attaching surface has a color of the attaching surface. Adhesive applying means for applying the adhesive having a different color from the optical sensor, an optical sensor for irradiating the adhesive surface of the label on which the adhesive is applied with light and receiving reflected light thereof, and the optical sensor Control means for detecting the amount of the adhesive based on the output level of the reflected light sent from the apparatus. 8. A label sticking device for sticking a label to an object to be stuck using an adhesive, wherein the adhesive has a color different from the color of the sticking surface on the sticking surface of the label. An adhesive application unit that applies light, an optical sensor that irradiates light to the sticking surface of the label to which the adhesive is applied, and receives reflected light thereof, and the adhesive is attached to the adherend. A sticking portion for sequentially sticking the applied label, and detecting the amount of the adhesive based on an output level of the reflected light sent from the optical sensor, and applied to the sticking surface of the label. A control unit for issuing a warning to a user when the amount of the adhesive is an inappropriate amount. 9. A label sticking apparatus for sticking a label to an object to be stuck using an adhesive, wherein the adhesive has a color different from the color of the sticking surface on the sticking surface of the label. An adhesive application unit that applies light, an optical sensor that irradiates light to the sticking surface of the label to which the adhesive is applied, and receives reflected light thereof, and the adhesive is attached to the adherend. A sticking portion for sequentially sticking the applied label, and detecting the amount of the adhesive based on an output level of the reflected light sent from the optical sensor, and applied to the sticking surface of the label. A label attaching device comprising: control means for stopping the attachment of the label to the object when the amount of the adhesive is an inappropriate amount. 10. A label sticking device for sticking a label to an object to be stuck using an adhesive, wherein the adhesive has a different color from the color of the sticking surface on the sticking surface of the label. An adhesive application unit that applies light, an optical sensor that irradiates light to the sticking surface of the label to which the adhesive is applied, and receives reflected light thereof, and the adhesive is attached to the adherend. A sticking unit for sequentially sticking the applied labels, and a detection output corresponding to the adhesive application amount is obtained based on a received light amount of the reflected light sent from the optical sensor, and the detection output is used as the label. Comparing with the comparison information indicating the detection output range when the amount of the adhesive applied to the sticking surface is within an appropriate range, and determining the difference between the detection output and the comparison information, Is out of the range of the comparison information, Label sticking apparatus characterized by a control means for adhesive application amount in the coating process is adjusted to be within a proper range.