JP2015215279A - Tackiness agent omission inspection equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment capable of inspect tackiness agent omission of a foil-like tackiness agent in a state with a label such as a double-sided tape, a seal, a label etc. adhered on a sheet.SOLUTION: A tackiness agent omission inspection equipment 1 includes: a transmitter 10 configured to transmit ultrasonic waves; a receiver 11 configured to receive the ultrasonic waves transmitted from the transmitter 10; and a controller 12 configured to determine that tackiness agent omission has occurred in an adhesive label 3 if intensity of the ultrasonic waves received at the receiver 11 is below a normal range, when a foil-like tackiness agent 31 existing on a rear face of the adhesive label 3 adhered on a sheet 2 passes between the transmitter 10 and the receiver 11.

Description

  The present invention relates to a technique for inspecting adhesive loss in an adhesive label after being attached to paper.

  When manufacturing a product such as a form by applying an adhesive to paper such as continuous paper or a single sheet, it is necessary to inspect the adhesive that has been applied to the paper for missing adhesive. As a technique for inspecting the adhesive missing of the adhesive applied to the paper, as described in “Problems to be solved by the invention” in Patent Document 1, the adhesive is colored and inspected for the presence of the adhesive. In general, however, there are other methods for detecting the fluorescent dye added to the adhesive (for example, Patent Document 2) and methods for measuring the thickness of the adhesive applied to the paper (for example, Patent Document 3). ) Is disclosed.

  However, in products where adhesive labels such as double-sided tape, seals, and labels are attached to paper, it is necessary to inspect the adhesive layer on the back side of the adhesive label for missing adhesive with the adhesive label attached to the paper. However, the conventional technology is a technique for inspecting the adhesive that has been applied to the paper for missing adhesive, and it is not possible to inspect the adhesive layer for missing adhesive with the adhesive label attached to the paper. It was.

Japanese Patent No. 3041826 JP 2002-239448 A Japanese Patent Laid-Open No. 2005-224779

  Accordingly, the present invention provides an apparatus capable of inspecting for adhesive omission in an adhesive layer present on at least one surface of an adhesive label in a state in which an adhesive label such as a double-sided tape, a seal and a label is attached to a sheet. With the goal.

  The adhesive missing inspection device according to the present embodiment includes a transmitter that transmits ultrasonic waves, a receiver that receives ultrasonic waves transmitted by the transmitter, and an adhesive layer that exists on at least one surface of the adhesive label. When passing between the transmitter and the receiver, the apparatus includes a controller that determines that the adhesive label has an adhesive missing when the intensity of the ultrasonic wave received by the receiver falls below a normal range.

  Since the intensity of the ultrasonic wave received by the receiver is significantly attenuated at the place where the adhesive is lost, if the apparatus is configured as in the present invention described above, an adhesive label such as a tape or a label such as a double-sided tape is used. With the sticking on the paper, it is possible to inspect the pressure-sensitive adhesive layer on at least one surface of the pressure-sensitive adhesive label for lack of pressure-sensitive adhesive.

The figure explaining the structure of an adhesive missing inspection apparatus. The figure explaining the intensity | strength of an ultrasonic wave when there exists adhesive removal. The figure explaining the installation state of a transmitter and a receiver.

  From here, preferred embodiments of the present invention will be described. The following description is not intended to limit the scope of the present invention, but is provided to aid understanding.

  FIG. 1 is a diagram for explaining the configuration of the adhesive missing inspection device 1, FIG. 2 is a diagram for explaining the intensity of ultrasonic waves when there is an adhesive missing, and FIG. 3 is a transmitter 10 and a receiver 11. It is a figure explaining the installation state of.

  As shown in FIG. 1, the adhesive missing inspection device 1 according to this embodiment includes a transmitter 10 that transmits ultrasonic waves, a receiver 11 that receives ultrasonic waves transmitted by the transmitter 10, and a sheet 2. When the adhesive layer 31 present on at least one surface of the adhesive label 3 is pasted between the transmitter 10 and the receiver 11, the intensity of the ultrasonic wave received by the receiver 11 is below the normal range. And a controller 12 that determines that the adhesive label 3 has an adhesive missing.

  In the present embodiment, the adhesive label 3 means an adhesive layer 31 provided on at least one surface (here, the back surface) of the base material 30 so that it can be attached to the paper 2. FIG. Then, although the adhesive label 3 is a double-sided tape, as another form of the adhesive label 3, a seal | sticker, a label, etc. can be assumed. In addition, the paper 2 to which the adhesive label 3 is attached means a paper-like medium. In FIG. 1, the paper 2 is a sheet material, but the paper 2 to which the adhesive label 3 is attached may be a continuous paper.

  FIG. 2 is a diagram for explaining the intensity of ultrasonic waves when there is a missing adhesive. The ultrasonic wave transmitted from the transmitter 10 is attenuated when passing through the paper 2 between the transmitter 10 and the receiver 11, and the amount of attenuation of the ultrasonic wave depends on the state of the location where the ultrasonic wave is transmitted. To do. If the adhesive label 3 has a portion 31a where the adhesive is missing, the adhesive label 3 is exposed to the adhesive label 3 via the air between the base material 30 (here, a double-sided tape release paper) and the paper 2. Since the ultrasonic wave transmitted toward the base material 30 is transmitted to the paper 2, the attenuation amount of the intensity of the ultrasonic wave received by the receiver 11 is increased.

  Therefore, the pressure-sensitive adhesive layer existing on the back surface of the pressure-sensitive adhesive label 3 affixed to the paper 2 is determined based on the intensity of the ultrasonic wave at a place where the pressure-sensitive adhesive is not removed. 31 is passed between the transmitter 10 and the receiver 11, and the controller 12 compares the intensity of the ultrasonic wave received by the receiver 11 with the normal range.

  When the adhesive label 3 is pasted on a part of the paper 2 as in the present embodiment, a timing signal (for example, an encoder signal) obtained from a mechanism that transports the paper 2 is input to the controller 12, and the controller 12 , Generates a gate signal indicating the timing when the adhesive label 3 passes through the location where the transmitter 10 transmits ultrasonic waves, and inspects for adhesive loss using the intensity of the ultrasonic waves when the gate signal is ON. Good.

  FIG. 3 is a diagram for explaining an installation state of the transmitter 10 and the receiver 11. In the present embodiment, in order to reduce the influence of the reflected wave from the surface of the adhesive label 3 or the like, the transmitter 10 and the receiver 11 are inclined by an angle θ with respect to the paper 2 to which the adhesive label 3 is attached. It is installed in.

  Actually, as the transmitter 10 and the receiver 11, a transmission type ultrasonic sensor (model: US-DC) manufactured by Takenaka Electronics Co., Ltd. is used, the distance d between the transmitter 10 and the receiver 11 is 45 mm, and the transmitter 10 is used. The angle θ of tilting the receiver 11 is set to 15 to 35 °, and a double-sided tape (here, the thickness of the release paper is 50 μm and the thickness of the adhesive layer is 30 μm) to be the adhesive label 3 is the paper 2 (thickness is 100 μm). It is confirmed that the adhesive loss can be detected normally using the two-sheet detection function of the transmission ultrasonic sensor (model: US-DC) manufactured by Takenaka Electronics Co., Ltd. did it.

  In the present invention, the principle that the adhesive missing inspection device 1 inspects the adhesive missing is the same as the detection of two sheets using ultrasonic waves as disclosed in, for example, Japanese Utility Model Laid-Open No. 2-129352. However, the problem that it was difficult to inspect the adhesive label 3 for missing adhesive with the adhesive label 3 attached to the paper 2 was solved by the same principle as the two-sheet detection using ultrasonic waves. Therefore, the present invention is considered useful.

DESCRIPTION OF SYMBOLS 1 Adhesive missing inspection apparatus 10 Transmitter 11 Receiver 12 Controller 2 Paper 3 Adhesive label 30 Base material 31 Adhesive

Claims (1)

A transmitter for transmitting ultrasonic waves, a receiver for receiving ultrasonic waves transmitted by the transmitter, and an adhesive layer present on at least one surface of the adhesive label passed between the transmitter and the receiver. In this case, the adhesive missing inspection device is provided with a controller that determines that the adhesive label is missing the adhesive when the intensity of the ultrasonic wave received by the receiver falls below a normal range.

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