JPH07100964A - Gluing monitoring device in folding box machine - Google Patents

Abstract

PURPOSE:To correctly detect whether gluing to a blank sheet has been positively performed to prevent an occurrence of a failure in gluing. CONSTITUTION:A glue sensor 32 is provided for detecting a loading amount of a glue 22 on the peripheral surfaces of gluing pieces 24, 25. A sheet sensor 34 is provided for detecting the passing of a blank sheet 10. A controller 44 is provided for judging whether the glue 22 on the peripheral surfaces of the gluing pieces 26, 25 has been transferred to the blank sheet 10 after the blank sheet 10 passes through the gluing pieces 24, 25 in contact with the peripheral surfaces thereof by a signal transmitted from the glue sensor 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to gluing of a box-making machine for automatically gluing a blank sheet and assembling a packaging box to monitor whether or not gluing has been reliably applied at a predetermined gluing position. Regarding monitoring equipment.

[0002]

2. Description of the Related Art Generally, a box-making machine automatically feeds a blank sheet having creases formed on a belt conveyor, folds the blank sheets in sequence at predetermined crease lines, and glues them at predetermined gluing positions. It is to be glued and assembled. Here, as shown in FIG. 2 and FIG. 3, the gluing is performed by adhering the gluing on the peripheral surfaces of the gluing pieces 25, 25 provided on the side and the lower side of the gluing tanks 26, 27, and gluing the circumferential surfaces Is transferred to a predetermined position of the fed blank sheet to perform gluing.

[0003]

SUMMARY OF THE INVENTION In the conventional box making machine described above, when the position of the peripheral surface of the glue piece and the position of the glued portion of the blank sheet are misaligned, the glue on the peripheral surface of the glue piece becomes blank. There is a problem that the paste is not reliably transferred to a predetermined position on the sheet and the gluing is incomplete. In particular, if there is an incomplete glue part in a part of the plurality of glue parts, there is a problem that the incomplete part cannot be found even in the inspection at the time of completion of the glue. Further, the box making speed of the box making machine is extremely high, and it is impossible for a human to monitor the gluing state for each blank sheet at the gluing location.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to accurately detect whether or not the gluing to the blank sheet has been reliably performed, and the gluing failure does not occur. An object of the present invention is to provide a gluing monitoring device for a box machine.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a glue sensor for detecting the amount of glue adhering to the peripheral surface of a glue frame and a sheet sensor for detecting the passage of a blank sheet are provided. This is a pasting monitoring device for a box-making machine provided with a control device for determining whether or not the glue on the peripheral surface of the glue frame has been transferred to the blank sheet after passing in contact with the blank sheet.

[0006]

The adhesive monitoring device for a box making machine according to the present invention uses the adhesive sensor to determine whether the adhesive on the peripheral surface of the adhesive piece has been reliably transferred to the blank sheet side. It is determined by the amount of glue on the surface.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be described based on. As shown in FIGS. 1 to 3, the box making machine of this embodiment is attached to a box making machine 20 for sticking up a packaging box for containing a predetermined product. The belt conveyor 12 conveys the blank sheet 10 forming the box, and the gluing devices 14, 15 for gluing the blank sheet 10 at predetermined positions. Further, as shown in FIG. 2, a folding claw 16 provided above a predetermined portion of the belt conveyor 12 to fold the blank sheet 10 at a predetermined folding ruled line, and a blank pressing guide 18 for pressing the blank sheet 10 to the belt conveyor 12 side. It is provided.

The blank sheet 10 forms, for example, a rectangular parallelepiped box body as shown in FIG. 4, in which a bottom face forming piece 1, a side surface 2, an upper lid portion 3, and a side surface pasting piece 4 are formed. Further, a bottom surface gluing piece 5 formed by folding back a pair of bottom surface forming pieces 1 facing each other in an assembled state.
have.

The gluing device 14 has a pair of glue pieces 24 for applying the glue 22 to the back surface side of the bottom gluing piece 5 of the blank sheet 10, and the gluing device 15 has the gluing device 15.
The side surface gluing section 4 has a glue piece 25 for gluing. The gluing device 14 is provided with a pair of gluing tanks 26 to which the gluing 22 is attached to the peripheral surface of the gluing piece 24. Further, in the gluing device 15, a lower portion of the glue piece 25 is immersed, and a glue tank 27 for attaching the glue 22 to the peripheral surface thereof.
Is provided. Further, as shown in FIG. 2, presser guides 30 for pressing the folded bottom surface gluing pieces 5 of the blank sheet 10 to the folding position are provided on both sides of the glue piece 24 of the gluing device 14. Further, as shown in FIG. 3, the gluing device 15 is provided with a pressing roller 28 that presses the blank sheet 10 toward the gluing piece 25 side.

The gluing monitor of the box making machine of this embodiment is
As shown in FIG. 1, a displacement sensor 32, which is a glue sensor that detects the surface positions of the glue pieces 24 and 25, and a photoelectric switch 34, which is a sheet sensor that detects the passage of the blank sheet 10, are provided in the glue pieces 24 and 25. It is provided for each. In the displacement sensor 32, the glue pieces 24 and 25 are the blank sheets 10.
It is provided at a position where it can face the surface after rotating in contact with. Further, the photoelectric switch is provided at a position where the blank sheet after passing through the glue pieces 24 and 25 can be detected. The displacement sensor 32 applies the laser light emitted from the semiconductor laser to the surfaces of the glue pieces 24 and 25, and detects the surface height of the glue pieces 24 and 25 at the light receiving position of the reflected light. The photoelectric switch 34 is a combination of a light emitting diode and a phototransistor, and detects the presence or absence of an object based on the presence or absence of reflection of light emitted from the diode.

Each displacement sensor 32 is attached to the gluing monitoring control board 3
6, and the photoelectric switch 34 is connected to a sequencer 40 as a control device which is provided in the gluing monitoring control board 36 and performs a predetermined control. The sensor control unit 38 is also connected to the sequencer 40. Further, the sequencer 40 is connected to a display 42 for displaying the operating states of the glue pieces 24, 25, and a lamp 44 for indicating a glue abnormality is attached to the upper surface of the glue monitoring control board 36. .

In the operation of the box making machine of this embodiment, as shown in FIG. 2, when the blank sheet 10 is unfolded, the bottom forming piece 1 and the bottom gluing piece 5 are moved by the folding claw 16 and the blank pressing guide 18. After being folded back, the state shown in FIG. 4 is obtained. Then, the blank sheet 10 is attached to the gluing device 14
When passing through, the pair of glue pieces 24 roll on the surfaces of the pair of bottom glue pieces 5, and the glue 22 is transferred. further,
As shown in FIG. 3, the glue 22 is transferred to the side surface gluing piece 4 of the blank sheet 10 by the glue piece 25 of the gluing device 15. Thereafter, the blank sheet 10 is further folded by a guide or the like (not shown), and the packaging of the packaging box is completed.

The gluing monitoring apparatus of this embodiment monitors the position of the glue 22 on the surfaces of the glue pieces 24 and 25 by the displacement sensor 32, and normally the glue 22 is detected while the blank sheet 10 is detected by the photoelectric switch 34. Blank sheet 1
If it is transferred to 0, since the surface positions of the glue pieces 24 and 25 detected by the displacement sensor 32 are displaced toward the glue piece center side by the thickness of the glue piece 22, the glue pieces 24 and 25 are detected.
It can be seen that there is no glue 22 on the surface of 25. In addition, when the amount of the glue 22 on the glue pieces 24 and 25 is detected by a predetermined amount or more,
Since the transfer of the glue 22 has not been normally performed, it is determined to be abnormal, and the lamp 44 is turned on to stop the driving of the paper feeding device for the blank sheet 10. Even when the glue tanks 26 and 27 do not have the glue 22, the positions of the surfaces of the glue pieces 24 and 25 are displaced to the center side of the glue pieces and are detected in the same manner as described above. Similarly, an error is displayed and the driving of the paper feeding device is stopped.

According to the gluing monitoring apparatus of this embodiment, gluing on the blank sheet 10 is reliably detected by the displacement sensor 32, and the glue 22 is normally transferred from the glue pieces 24, 25 to a predetermined position on the blank sheet. If there is no such error, it is determined that there is an abnormality, and therefore the mistake in sticking the blank sheet 10 can be reliably eliminated. Also,
It is also possible to detect the absence of glue in the glue tanks 26 and 27, and it is possible to reliably prevent defective gluing.

The glue sensor and the sheet sensor of the present invention are not limited to the displacement sensor and the photoelectric switch, but may be those using a proximity sensor or another photoelectric element, and can reliably detect the presence or absence of the glue or the blank sheet. Any detection means can be used as long as it is possible.

[0016]

EFFECT OF THE INVENTION The pasting monitoring device for a box making machine according to the present invention is
Since the glue sensor detects whether or not the glue has been applied to the blank sheet, there is no gluing failure when assembling the blank sheet, and there is no increase in the number of steps. Simply attach to the existing box making machine and it is easy. In addition, it is possible to perform reliable gluing monitoring.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a first embodiment of a gluing monitoring device for a box making machine according to the present invention.

FIG. 2 is a perspective view showing a part of a box making machine to which the gluing monitoring device of this embodiment is attached.

FIG. 3 is a perspective view showing another part of the box making machine to which the gluing monitoring device of this embodiment is attached.

FIG. 4 is a development view in which a blank sheet used in this example is partially folded.

[Explanation of symbols]

 10 Blank Sheets 14 and 15 Gluing Device 22 Glue 24 and 25 Gluing Frame 32 Displacement Sensor 34 Photoelectric Switch 36 Gluing Control Panel 40 Sequencer

Claims (2)

[Claims] 1. A glue sensor for detecting the amount of glue adhering to the peripheral surface of the glue frame, and a sheet sensor for detecting the passage of a blank sheet are provided, and the blank frame is contacted with the peripheral surface of the glue frame and then passes through the glue frame. A gluing monitoring device for a box making machine, which is provided with a control device for judging whether or not the gluing on the surface has been transferred to the blank sheet by a signal from the gluing sensor. 2. The glue sensor is a displacement sensor comprising a light emitting element and a light receiving element capable of detecting the light receiving position of the reflected light of the light emitted from the light emitting element. The gluing monitoring device for a box making machine according to claim 1, wherein the surface position of the gluing is detected.