JP2003212215A - Apparatus for detecting swollen out glue in box fabricating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance an operation efficiency by automatically detecting that a box having sticking glue is fabricated so as to release an operator from a visual inspection. <P>SOLUTION: A light-emitting device arranged in such a manner that light can pass through glue injected from a glue nozzle of a box fabricating machine, a photoreceptor which is located so that light passed through the glue can be received, and a controller which judges it 'good' if light received by the photoreceptor is less than a predetermined light volume and judges it 'bad' if it is more than the predetermined light volume, are provided. When the glue is injected in a wider spreading, the density of the glue injected becomes lower and light volume passed through the glue is increased. Then the fact that the glue is coated in a wider spreading is automatically judged from the light volume. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box making machine for assembling a corrugated cardboard box, spraying glue (glue) from a glue nozzle to the stacking margin of the box to apply the glue, and adhering the stacking margin. The present invention relates to a novel glue sticking-out detection device which is installed and prevents the glue from sticking out inside a box and contaminating a packaged product.

[0002]

2. Description of the Related Art FIG. 1 shows an example of a box assembled by a box making machine. The box 10 is stored in a state in which the body portion 10a is formed in a rectangular tube shape in advance, the bottom pieces 11 and 12 are not bent, and the body portion is crushed so that the entire body has a plate shape. When the box 10 is used, the body portion 10a is unfolded so as to have a rectangular tube shape and set at the entrance of the conveying means of the box making machine. While the box making machine conveys the box 10 by the conveying means, first, the bottom pieces 11, 11 are bent in the first section as shown in FIG. Next, it is conveyed to the second section and the glue 13 is sprayed on the inside of the bottom pieces 12, 12. In the second section, a pair of glue nozzles for ejecting glue are usually installed in the left and right directions below the conveying means. Next, the bottom piece 1 is transported to the third section.
Bends 2 and 12 as shown by the arrows, and the bottom piece 11 and the bottom piece 12 are joined and adhered to each other to complete the assembly of the box.

[0003]

Since the glue is easily hardened, the hardened glue may be clogged at the tip of the glue nozzle. When the glue is ejected in this state, the glue is diffused and ejected, and the glue adheres to a wide area, and when the box is assembled as it is, the glue will protrude to the bottom surface of the box. Then, when the product is packed in the box, there is a problem that the product adheres to the product and becomes dirty.
Conventionally, in order to prevent such problems, it has been necessary to visually inspect the assembled boxes and eliminate defective boxes before packing the goods.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems described above by automatically detecting that the box with the glue protruding is assembled, freeing the operator from visual inspection, and improving the work efficiency. is there.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a light emitter arranged so that light passes through a glue ejected from a glue nozzle of a box making machine, and a light emitter arranged to receive light passing through the glue. And a controller for determining that the light received by the light receiver is less than a predetermined amount of light and that the light is defective if more than a predetermined amount of light.

When the glue is diffused and ejected from the glue nozzle, the density of the ejected glue becomes low, and when there is light passing through the glue, the amount of the light transmitted increases. Therefore, the light emitter is arranged so that the light passes through the glue ejected from the glue nozzle, the light receiver is arranged so as to receive the light passing through the glue nozzle, and the transmitted light amount of the light passing through the glue is measured, It is possible to automatically detect that the glue is diffused and ejected by determining that the quantity of light is good if the quantity of light is less than a predetermined quantity of light and bad if the quantity of light is larger than a predetermined quantity of light. Further, when it is determined to be defective, it is easy to stop the operation of the box making machine, sound an alarm, and automatically take appropriate measures.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings related to the embodiments. FIG. 2 is a front explanatory view of the glue protrusion detecting device of the embodiment. 3 and 4 are plan explanatory views,
FIG. 5 is an explanatory diagram showing the flow of signals. 2 to 4
The main body of the box making machine excluding the glue nozzle is omitted in FIG.

This embodiment comprises a light emitter 1, a light receiver 2, a mirror 3 and a controller. In this case, the light emitting device 1 and the light receiving device 2 are integrated into a laser sensor head. This head is set toward the glue ejected from the glue nozzle 4. A mirror 3 is set on the opposite side of the ejected glue. As shown in FIG. 2, since a pair of glue nozzles is provided to the left and right, a light emitter, a light receiver, and a mirror are also provided for each glue nozzle. The laser light emitted from the light emitter 1 passes through the ejected glue 13 and then is reflected by the mirror 3 and again passes through the glue 13 and is received by the light receiver 2. As shown in FIG. 3, when the glue 13 is ejected normally, the glue is not diffused and has a high density, so that the amount of laser light that is transmitted is small. As shown in FIG. 4, when the glue 13 is diffused and ejected, the density of the glue becomes thin, and the amount of laser light that passes through increases. The light emitter, the light receiver, and the mirror can be set freely by holding them in an appropriate frame of the box making machine, or by separately making a dedicated frame from the floor and holding it.

The control unit is a microcomputer or a sequencer, and as shown in FIG. 5, a light amount signal is input from the light receiver 2 and an origin position signal and a glue injection signal are input from the box making machine. When the control unit receives a glue jetting signal (a signal indicating the glue jetting timing) from the box making machine, the control unit reads the respective light amount signals from the two light receivers 2. Then, the amount of light received by each light receiver is compared with a predetermined threshold value, and when the amount of light is less than the threshold value, it is determined to be good, and when it is greater than the threshold value, it is determined to be defective. If it is determined to be defective,
The control unit sends the origin position signal from the box making machine (operation of the box making machine 1
Waiting for (the signal indicating the beginning of the cycle) to send a stop signal to the box making machine to stop the box making machine at the origin position.

In this embodiment, the light emitter and the light receiver are provided on the same side and the mirror is provided on the opposite side with respect to the ejected glue, but the light emitter and the light receiver are not provided on the opposite side. Can also be provided.

[0011]

As described above, according to the present invention, it is possible to automatically detect that the box with the glue protruding is assembled by detecting that the glue is diffused and jetted, so that the operator can be freed from visual inspection. However, it is possible to improve work efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a box assembled by a box making machine.

FIG. 2 is a front explanatory view of the glue protrusion detection device according to the embodiment.

FIG. 3 is an explanatory plan view of a glue protrusion detecting device according to the embodiment.

FIG. 4 is an explanatory plan view of a glue protrusion detecting device according to an embodiment.

FIG. 5 is an explanatory diagram showing a signal flow in the glue protrusion detection device according to the embodiment.

[Explanation of symbols]

1 light emitter 2 light receiver 3 mirror 4 glue nozzle 10 boxes 10a body 11 bottom piece 12 bottom piece 13 glue

Claims (2)

[Claims] 1. A light emitter arranged to allow light to pass through a glue ejected from a glue nozzle of a box making machine, and a light receiver arranged to receive light passing through the glue.
A glue protrusion detection device for a box making machine, comprising: a control unit that determines that the light received by the light receiver is good if the amount of light is less than a predetermined amount, and is defective if the amount of light is large. 2. The detection device according to claim 1, wherein the operation of the box making machine is stopped when the controller determines that the glue is protruding.