JPH0820366B2 - Adhesion detection method and device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gluing detection for inspecting the presence or absence of a gluing defect in the gluing process of an apparatus such as a collation processing machine, a box making machine, a bookbinding machine, or the like. A method and apparatus.

(Technical background and problems to be solved) In the past, in the pasting process of devices such as collation processing machines, box making machines, bookbinding machines, etc., in order to detect defective pasting or degree of pasting, application was performed using optical sensors. The glue is irradiated with light, the reflected light or the transmitted light of the light is received by the light receiving device, and the amount of glue or the presence or absence of the glue is determined by the change in the light receiving signal output from the light receiving device. However, in this method, the presence or absence of glue is detected by the intensity of received light of reflected light or transmitted light, so that the distance and angle between the detected object and the optical sensor can be kept constant while the object is detected. It must be illuminated with intensity. Furthermore, the color and material of the object to be detected or the comparative object must be constant, but in the case of a collation processing machine, for example, glue is often applied with a width of about 1 mm, and light of a certain intensity can be applied to a small glue. It requires very delicate setting conditions to irradiate. Therefore, the above detection method has a drawback that the operability is extremely poor. Further, there is also a problem that the paper or film to which the glue is applied has already been printed, and the color change is inevitably present.

Therefore, a method of focusing on the water content in the glue component and using a capacitance sensor to detect the difference in capacitance due to the difference in water content of the paper or film and determining the amount of glue or the presence or absence of glue is considered. ing. However, the capacitance sensor cannot measure when there is a metal near the detector, and in order to measure a minute difference in capacitance, it is necessary to make a slight alignment of the detection unit. In addition, since there is a weak point that the vibration of the object to be detected is very weak, there is a drawback that the operability is poor and the production is significantly hindered.

As described above, with the current detection method, there is almost nothing that can be practically used, so in reality, an operator visually or inspects a sample, or another operator inspects all products in a separate process, and it is possible to check for defective gluing. The reality is what we are discovering.
However, it is physically impossible to completely eliminate defects by the operator's visual inspection or sample inspection, and no matter how the capability of the device is improved, the operator cannot be completely released from the inspection work. There wasn't. Further, even when another worker inspects all the products in another process, the worker has to perform a simple work for a long time, and in this case, there is a problem that the production efficiency is remarkably reduced. It was

(Object of the Invention) The present invention has been made under the circumstances as described above, and an object of the present invention is to automatically apply glue to sheets such as continuous paper, film or sheet, and perform predetermined processing work. (EN) Provided are a gluing detection method and a gluing detection method, which detect a defective gluing or the amount of gluing that occurs in a device to be performed, based on the amount of light emission of a fluorescent agent added to the gluing to improve the automation of the inspection process and the production efficiency. Especially.

(Means for Solving Problems) The present invention relates to a gluing detection method, and an object of the present invention is an apparatus for automatically applying gluing to conveyed sheets and performing a predetermined working operation. In the above, when a fluorescent agent is added to the paste in advance, and the sheet is coated with the fluorescent agent-added adhesive, the adhesive is irradiated with ultraviolet rays to detect the amount of light emission, This can be achieved by determining the presence or absence or the degree of defective attachment.
Further, another invention relates to a gluing detection device of a device for automatically applying a gluing agent to conveyed sheets and adding a fluorescent agent to the gluing agent in advance to perform a predetermined processing operation. An object of the present invention is to provide a light source means for irradiating the glue with ultraviolet rays when the glue is applied to the conveyed sheets, and a detecting means for detecting the light emission amount of the glue emitted by the light source means. This is achieved by providing a determination means for determining the presence or absence of a gluing failure by the detection signal from the detection means and for warning the occurrence of the failure in a predetermined case.

(Effect of the Invention) The present invention is a continuous paper that is fed with a fluorescent agent added in advance to the glue used for the work in the gluing process of a device such as a collation processing machine, a box making machine, a bookbinding machine. By applying glue with fluorescent agent added to sheets such as film or sheet, the glue is irradiated with ultraviolet rays from an ultraviolet source such as black light, and the amount of light emission is detected as the amount of glue. The presence or absence of gluing failure and the amount of glue are automatically determined.

(Embodiment of the Invention) FIG. 1 shows a state in which a gluing detection device for realizing the method of the present invention is used in a collating machine. The gluing failure detection device includes an ultraviolet source 1, a detection unit 2, an analog signal amplifier 3, and an apparatus body 10 which are attached to a supporting member 25 of a collating machine.
The continuous paper 21A, 21B to be conveyed, which is composed of
It is designed to detect defective gluing and the amount of glue. On the front panel of the device body 10, a power switch 16, a reset switch 17, a lamp 18 that lights when the gluing condition is good, a lamp 19 that lights when the gluing condition is bad, and a display 100 that displays the amount of glue are provided. An alarm buzzer 15 is provided on the side panel of the apparatus body 10 to issue an alarm when the gluing condition is poor.

FIG. 2 shows the positional relationship between the collation processing machine, the ultraviolet light source 1 and the detection section 2. The continuous paper 21 is provided below the collation processing machine.
Rolls 20A and 20B in which A and 21B are wound are provided, and continuous paper 21A and 21B fed from the rolls 20A and 20B in the arrow direction.
Is conveyed in the direction of arrow E via pin wheels 24A, 24B provided above. In the vicinity of the pin wheel 24A,
A glue application device 22 for applying glue to the conveyed continuous paper 21A is provided, and a bevel wheel 23 for pressing and joining the conveyed continuous papers 21A and 21B is provided above the pin wheel 24A. ing. Here, the detection unit 2 is the glue applying device 22.
The UV light source 1 irradiates the glue 30 with the ultraviolet ray BL at the stage where the glue 30 is applied to the continuous paper 21A that is located above the continuous paper 21A and is further above this and is fed in the direction of the arrow E via the pin wheel 24A. In addition, the detection unit 2 is configured to efficiently detect the light emission KL from the glue 30.

FIG. 3 shows the circuit system of the gluing detection device in a block configuration, which will be described in detail below.

1) Ultraviolet light source 1; A fluorescent lamp type black light or the like is used as the ultraviolet light source 1, so that the glue 30 (having a fluorescent agent added in advance) applied to the continuous paper 21A being conveyed is irradiated with the ultraviolet light BL. It has become. Then, while keeping the intensity of the ultraviolet light to be irradiated constant over time and using a high frequency power (about 20 KHz) to stabilize the light emission of the glue 30, the fluorescent light type black light is turned on at a high frequency. By arranging the light receiving surface of 2 and the ultraviolet light source 1 at 45 °, the incidence efficiency of the ultraviolet light BL emitted from the ultraviolet light source 1 directly entering the light receiving surface of the detection unit is reduced, and the S / N ratio is improved. I am letting you.

2) Detection unit 2; The detection unit 2 uses a photodiode having a measurement wavelength for visible light, and the light emission KL of the glue emitted by the ultraviolet light source 1.
Is received, and photoelectric conversion is performed, and a photodiode having a wide measurement field of view is used, and the measurement field of view can be easily set by the shape of the light receiving part or the lens system. Further, a filter FL is attached to the front surface of the light-receiving element in order to select only the light emission KL of the glue 30 to receive the light and eliminate the influence on the signal of the external light.
Also, two detection units 2 can be used to clarify the distinction between paper and glue.

3) Analog signal amplifier 3; analog signal amplifier 3 is a MOS type input operational amplifier or the like.
It is composed of two operational amplifiers, and it is easier to distinguish the detection signal KS1 received by the detection unit 2 and photoelectrically converted, and S
The / N ratio is improved and output to the subsequent circuit.

4) Device body 10; a) Judgment unit A / D conversion unit 11 A / D conversion unit 11 is composed of a timing pulse control circuit, a clock generation circuit, a sample hold circuit, an A / D conversion circuit, etc. Detection signal KS from amplifier 3
2 is sampled, converted into a digital signal, and input to the control one-board computer 12.
The timing pulse control circuit uses a clock pulse of a fixed cycle generated from a clock generation circuit for controlling the operation timing of the sample hold circuit and the A / D conversion circuit according to the control pulse sent from the control one-board computer 12, The time required for A / D conversion is determined by inputting a clock to the D conversion circuit. The sample-and-hold circuit samples the analog voltage during A / D conversion to eliminate the conversion error during A / D conversion, and fixes it at the data value at that time.
Sampling is performed at a degree. The A / D conversion circuit uses a commercially available 8-bit successive conversion type A / D conversion IC, the input side is bipolar input, the range of the input signal is wide to simplify the whole circuit, and the output side has each A buffer is incorporated for each bit to prevent noise.

Control computer 12: The control computer 12 is a one-board computer, and includes a central processing unit (CPU), storage device (RAM, EPROM), input / output interface (PPI), decoder, timer, etc. (PP
It is composed of I), and it is uncertain from the two values of the signal strength input from the preceding circuit via the input / output interface when the glue is completely attached and the signal strength when no glue is attached. The signal strength that makes a non-defective product is calculated, and that value is stored in the storage device as a determination value. After that, the central processing unit compares the input signal value read from the sequential input / output interface with the determination value stored in the storage device to determine the presence or extent of the gluing failure, and determine that the gluing failure has occurred. The central processing unit calculates the determination signal HS via the input / output interface and inputs it to the alarm device 13. In addition, a value (digital value) corresponding to the amount of glue is stored in the storage device in advance, and the input signal read as described above is judged,
It is designed to be displayed on the display 100.

Alarm device 13; The alarm device 13 is composed of a relay sequence or the like, and outputs a control signal PS1 for operating the alarm buzzer 15 or the like by the judgment signal HS from the control computer 12 or a control signal PS2 for causing the lamp 19 to emit light. Is input to the operation unit 14.

b) Operating unit 14; The operating unit 14 is composed of a power switch 16, a reset switch 17, and lamps 18 and 19, and an operator activates the gluing detection device and confirms the gluing condition, and gluing failure occurs. At this time, the device body 10 is reset to return to a state where it can be detected again. When using the detection device, the operator pushes the power switch 16 and then pushes the reset switch 17 after the adhesive failure occurs and the countermeasure is completed.

The operation of the gluing detection device used in the collating machine in such a configuration will be described.

First, set the gluing failure detection device on the collating machine as shown in FIG. 1, and glue the gluing device 22 with the fluorescing agent in advance.
Put 30 in it. Then, the operator turns on the power switch 16 provided in the apparatus main body 10 when the collating machine is operating,
Operate the glue detection device. The glue 30 is applied to the continuous paper 21A sent from the roll 20A by the glue applying device 22, and the light emission KL of the glue 30 excited by the ultraviolet light source 1 is detected by the detection unit 2 and is transmitted via the analog signal amplifier 3 to the device. Input to the main body 10, A / D converter 11, control computer 12, alarm device 13
And the lamp 18 of the operation unit 14 is turned on to display that the gluing condition is good. Here, continuous paper 21A
If a problem occurs in the gluing of the, the detection unit 2 detects, a sound is emitted from the alarm buzzer 15 provided in the apparatus body 10, the lamp 19 of the operation unit 14 is turned on,
A warning is issued to the operator. The operator checks the continuous paper 21A, 21B for gluing defects by stopping the collating machine, and then presses the reset switch 17 on the operation unit to
10 is reset and the collating machine is operated again. Further, since the amount of glue is displayed on the display 100 in this glue detection device, the operator can control the quality of glue by checking the amount of glue.

Next, an example in which the gluing detection device is used in the gluing device of a box making machine will be described.

FIG. 4 shows a state in which the gluing detection device is used in the gluing device of a box making machine. The same members as those in FIG. 1 are designated by the same reference numerals. The gluing failure detection device has an ultraviolet source 1, a detection unit 2, and an analog amplifier 3 attached to a supporting member 45 of the gluing device, and each unit is connected to the device main body 10 by a signal cord 4 and a power cord 6. The gluing failure or the degree of the unfolding sheet 50 conveyed from the box machine is detected.

FIG. 5 shows the positional relationship between the gluing device, the ultraviolet light source 1 and the detector 2, which will be described with reference to FIG. Conveyor belts 43A and 43B for conveying the development sheet 50 are provided in the gluing device.
Is provided, and the development sheet 50 on the roller 46 is conveyed in the direction of arrow F. A glue wheel 42 is provided above the roller 46, and is rotated in the direction of arrow G by a glue wheel driving gear 43. The glue wheel 42 rotates while the roller 46 is rotating.
A glue is applied to the upper development sheet 50. To the right of the glue wheel 42, a glue boat 41 that applies glue to the glue wheel 42, and this glue boat
A glue tank 40 for supplying glue to 41 is provided. Here, the ultraviolet light source 1 and the detection unit 2 are attached to the left side of the glue wheel at the positions shown in the figure, and the development sheet 50 coated with the glue by the ultraviolet light source 1 is irradiated with the ultraviolet light BL, and the detection unit 2 emits glue KL. Is detected. Here, unlike the case of the collating machine described above, since the inspection target is not the continuous paper but the expansion sheet 50, it is determined whether the work of the expansion sheet 50 to be inspected is within the field of view of the detection unit 2. You have to determine. Therefore, a photoelectric switch is provided at a fixed position in front of the detection unit 2, a rotary encoder is provided in the drive unit of the conveyor belts 43A and 43B to detect the speed in real time, and after the photoelectric switch is turned on from the data of,
The detector 2 is repeatedly turned on and off with a delay time.

The operation of the gluing detection device having such a configuration will be described.

First, the gluing detection device is set in the gluing device of the box making machine as shown in FIG. 4, and the gluing tank 40 is filled with the gluing agent to which the fluorescent agent is added in advance. Then, the worker turns on the power switch 16 of the apparatus main body 10 before the operation of the box making machine, operates the box making machine, and the printed development sheet 50 is conveyed on the rollers 46 by the conveyance belts 43A and 43B. Then, the detecting unit 2 is turned on and off as described above, and the fluorescent agent contained in the glue is excited to detect the luminescence KL as described above. The lamp 18 is turned on and it is displayed that the gluing situation is good. Here, if a failure occurs in the gluing of the unfolding sheet 50, the warning buzzer 15 and the lamp 19 are turned on to warn the operator of the gluing failure, so that the unfolding sheet or the like can be stopped by stopping the box making machine. To check. After that, the reset switch 17 is pressed to reset the device body 10 and continue the work again. Further, as in the case described above, the quality control of gluing can be performed by the display 100.

Next, an example in which the above-described gluing detection device is used in the gluing device of a bookbinding machine will be described.

FIG. 6 shows a state in which the gluing detection device is used in the gluing device of a bookbinding machine, and the same members as those in FIG. 1 are designated by the same reference numerals. The gluing detection device has an ultraviolet source 1, a detection unit 2, and an analog amplifier 3 attached to a support member 64 of the gluing device 61, and each unit is connected to the device body 10 by signal cords 4 and 5 and a power cord 6. It is designed to detect the gluing failure or the degree of the book 70 being manufactured which is conveyed from the bookbinding machine.

FIG. 7 shows the positional relationship between the bookbinding machine, the ultraviolet light source 1 and the detector 2, which will be described with reference to FIG. The binding machine is provided with a gluing device 61, and glue is supplied from a gluing tank 65 from a glue supply pipe 63 provided at the lower part and stored in the gluing device 61. Rail for
When the book 70 being manufactured is conveyed in the direction of arrow k by 60, glue is applied to the end surface of the book 70 by rotation of the gluing rolls 62A and 62B provided in the gluing device 61. . Here, the ultraviolet light source 1 and the detection unit 2 are glue devices.
It is attached to the left part of 61 at the position shown in the figure, and the end face of the book 70 coated with the glue is irradiated with the ultraviolet ray BL by the ultraviolet ray source 1, and the light emission KL of the glue is detected by the detecting section 2. .
Further, here, the detection unit 2 is turned on / off by a photoelectric switch and a rotary encoder as in the case of the box making machine described above.

The operation of the gluing detection device having such a configuration will be described. First, the gluing detection device is set in the gluing device 61 of the bookbinding machine as shown in FIG. 6, and the gluing device 61 is supplied with the gluing agent previously added with the fluorescent agent from the gluing tank 65 as described above. Then, the operator turns on the power switch 16 of the apparatus main body 10 during the operation of the bookbinding machine. The book 70 is carried by the carrying rail 60, glue is applied to the end surface of the book 70 by the rolls 62A and 62B with glue, and the ultraviolet light source 1 excites the fluorescent agent contained in the glue to emit light. KL uses the detection unit 2 as described above.
Is detected, the lamp 18 of the operation unit 14 is turned on, and it is displayed that the gluing situation is good. Here, if a problem occurs with the gluing of the book 70, the alarm buzzer 15 and the lamp 19 are turned on to warn the operator of the problem. Therefore, the bookbinding machine is stopped or the book 70 or the like is checked. Further, as in the case described above, the quality control of gluing can be performed by the display 100. After that, the reset switch 17 is pushed to reset the device body 10, and the work is continued again.

The amount of the fluorescent agent contained in the paste is 1% to
A 5% aqueous solution should be contained in a ratio of 0.3% to 10%, and a 4% aqueous solution was contained in a ratio of 1% in the examples.
Further, in the above-described embodiment, the one-board computer is used as the control computer 12 in the apparatus main body 10, but a personal computer may be used. Alarm buzzer 15,
Although the alarm is issued to the worker using the lamps 18 and 19, the machine may be stopped directly by the output signal from the alarm device 13. Further, in the case where a plurality of detection units 2 are determined by one determination unit, a multiplexer circuit may be incorporated in the determination unit and the detection signals may be sequentially compared.

(Effects of the Invention) According to the present invention, it is possible to automatically inspect all the products for defective gluing or the amount of gluing at the same time as the processing work. Therefore, it is possible to eliminate defects while maintaining high quality of the products and improve productivity. it can. In addition, since the device performs the inspections that were conventionally performed by humans instead, the operator is freed from the inspection work, and it is not necessary to inspect all products in a separate process, which saves labor.
This has the effect of significantly promoting labor saving.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a gluing failure detecting device for realizing the method of the present invention is used in a collating machine, FIG. 2 is a diagram showing a positional relationship between an ultraviolet source and a detecting portion, and FIG. 3 is FIG. 4 is a diagram showing a block configuration of a circuit system of the gluing defect detection device, FIG. 4 is a diagram showing a state of using the gluing defect detection device in a gluing device of a box making machine, and FIG. FIG. 6 is a diagram showing the positional relationship between the ultraviolet ray source and the detecting section, and FIG. 6 is a diagram showing a state in which the defective gluing detection device is used in the gluing device of a bookbinding machine. 1 ... Ultraviolet source, 2 ... Detection unit, 3 ... Analog signal amplifier, 10 ... Device main body, 11 ... A / D conversion unit, 12 ... Control computer, 13 ... Alarm device, 14 ... Operating part, 15 ...
… Alarm buzzer, 16 …… Power switch, 17 …… Reset switch, 18,19 …… Lamp, 20A, 20B …… Roll, 21A, 22
B …… Continuous paper, 23 …… Pin wheel, 24A, 24B …… Spring wheel.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-6638 (JP, A) JP-A-60-127137 (JP, A)

Claims (2)

[Claims] 1. A device for automatically applying glue to conveyed sheets and performing a predetermined processing operation, adding a fluorescent agent to the adhesive in advance, and adding the fluorescent agent to the sheets. At the stage of applying the applied glue, the glue detection method is characterized by irradiating the glue with ultraviolet rays and detecting the amount of emitted light to determine the presence or degree of the glue failure. 2. An apparatus for automatically applying glue to conveyed sheets and adding a fluorescent agent to the paste in advance so as to perform a predetermined processing operation on the conveyed sheets. When the adhesive is applied, a light source means for irradiating the glue with ultraviolet rays, a detection means for detecting the amount of light emitted from the glue emitted by the light source means, and a presence or absence of a gluing defect based on a detection signal from the detection means While determining the degree,
A gluing detection device, characterized in that it is provided with a judging means for warning the occurrence of a defect in a predetermined case.