JP2000233457A - Adhesive excess/deficiency signal generator for box original body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly exclude a defective article due to the excess/deficiency of an adhesive without employing a full-time worker. SOLUTION: The quantity of the adhesive bonded to the flap 14 of a corrugated cardboard sheet 1 by the glue gun 15 of a folder gluer 3 is detected by an inspection device 16 and marking is applied to the corrugated cardboard sheet 1 of which the adhesive quantity is detected by a marking gun 17 and the marking region of a fed box original body 2 is monitored by the sensor 20 arranged in the vicinity of the terminal of a discharge conveyor 5. When the marked box original body 2 is detected, the alarm lamp arranged at the position of a piling device 7 is allowed to light to report the generation of a defective caused by the excess/deficiency of an adhesive of the box original body 2. By this constitution, the defective box original body 2 can be certainly excluded without a full-time worker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for generating a signal indicating an excess or deficiency of an adhesive on a box body in a line for manufacturing an annular box body folded from a sheet.

[0002]

2. Description of the Related Art When manufacturing a folded annular box original shape before being assembled into a box from a sheet of a cardboard or the like provided with a folding ruled line or a glue allowance, for example, in the embodiment of the present invention, As shown in FIG. 1, a folder gluer 3 for processing a supplied cardboard sheet 1 into a box prototype 2.
And box original 2 folded and glued with folder gluer 3
Hopper 4 as a means for correcting the rectangularity of
Conveyor 5 for discharging the box prototype 2 from the stack, a stacking device 7 for stacking the box prototype 2 conveyed by the discharge conveyor 5 on a predetermined number of piles 6, and a box prototype 2 discharged from the stacking device 7. A production line is used in which a delivery conveyor 8 for delivering the hills 6 to a binding device (not shown) is arranged in order.

As shown in FIG. 2, the folder gluer 3 includes an upper conveyor belt 9 extending over the entire length and a corrugated cardboard sheet 1.
, A folding rod 12 for bending the corrugated cardboard sheet 1 guided by the rail 10 downward along the ruled line 11 while being conveyed, and a folded corrugated cardboard sheet 1 discharged from the rail 10 to the upper conveyer. It is basically composed of a lower conveyor belt 13 that is sandwiched and folded between the belts 9 to form the box original form 2 and a glue gun 15 that attaches an adhesive to the glue margin 14 of the cardboard sheet 1. The folder gluer 3 includes a type in which the cardboard sheet 1 is bent upward and a type in which an adhesive is applied by a roller.

[0004]

In the above-described box prototype manufacturing line, the amount of the adhesive applied to the glue allowance of the corrugated cardboard sheet by the adhesive applying device of the folder gluer may be excessive or insufficient. If the amount of the adhesive is too small, the glue margin of the original box is peeled off, and if it is too large, the adhesive protrudes from the glue margin and is bonded to an extra portion around the glue margin. Any of the box prototypes in which the amount of the adhesive is excessive or inadequate is a defective product.

Conventionally, checking for defective products caused by excess or deficiency of the above-mentioned adhesive has been performed by a sampling inspection by a person. This type of reject is rare,
No dedicated worker for this inspection is arranged, and another worker is also performing sampling inspection. Therefore, there is a problem that these defective products cannot be eliminated without being overlooked in the production line.

An object of the present invention is to provide a device for generating an adhesive excess / deficiency signal for an original box, which can reliably remove defective products due to excess or deficiency of adhesive without a dedicated worker.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an adhesive excess / deficiency signal generating apparatus according to the present invention comprises a sheet provided with a folding ruled line and a glue allowance while conveying the sheet. It is bent in a ring along the ruled line, adhesive is applied to the glue margin with an adhesive gluing device, and both ends of the annularly folded sheet are glued with this glue margin, and processed into a flat folded box original form Folder gluer, a correcting means for correcting the rectangularity of the box body discharged from the folder gluer, a discharge conveyor for discharging the box body from the correcting means, and a box body conveyed by the discharge conveyor. In a box prototype manufacturing line in which a stacking device for stacking piles of sheets and a delivery conveyor for sending out piles of box prototypes discharged from the stacking device are sequentially arranged, the connection of the folder gluer is performed. Downstream from the agent adhering device, an inspection device that detects excess or deficiency of the adhesive attached to the glue margin is provided, and a sheet on which the inspection device detects excess or deficiency of the adhesive is provided downstream of the inspection device. A marking device for performing marking on the sheet is provided, and a detection device for detecting the marking applied to the sheet is provided at a predetermined position downstream of the correcting means, and the detection device is used to mark the original box. Is detected, a means for generating a signal for notifying the excess or deficiency of the adhesive to the original box body is provided.

As means for generating a signal for notifying the excess or deficiency of the adhesive, an alarm signal for notifying a person by sound or light, or an electric signal generating device for operating a defective product removing device such as a robot may be employed. Can be.

The reason why the installation position of the marking detecting device is located downstream of the correcting means is that it is difficult to remove a sheet having an insufficient amount of adhesive before the correcting means. Since the box prototypes are transported one by one on the discharge conveyor downstream of the straightening means, if the presence of the box prototype with insufficient or insufficient adhesive is detected, this is removed by a defective product such as a human or robot. Can be easily eliminated. In the stacking device and the sending-out conveyor, since the box prototypes are in a piled state, if it is known in which pile the box prototype with insufficient adhesive is located, a box with insufficient adhesive is provided with sufficient time. Intact forms can be eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a cardboard box prototype production line provided with the adhesive excess / deficiency signal generator of the present invention. This production line includes a folder gluer 3 for processing a corrugated cardboard sheet 1 provided with a folding rule and a margin for glue supplied from a sheet processing machine (not shown) into a box original form 2, and folding and bonding with the folder gluer 3. Hopper 4 as means for correcting the rectangularity of the box prototype 2
A discharge conveyor 5 for discharging the box prototype 2 from the bottom of the hopper 4; a stacking device 7 for stacking the box prototype 2 conveyed by the discharge conveyor 5 on a predetermined number of piles 6; And a delivery conveyor 8 for delivering the peaks 6 of the box prototype 2 to a binding device (not shown).

As shown in FIG. 2, the folder gluer 3 includes an upper conveyor belt 9 extending over the entire length and a corrugated cardboard sheet 1.
, A bending rod 12 for bending the corrugated cardboard sheet 1 guided by the rail 10 downward along the ruled line 11 during conveyance, and a folded corrugated cardboard sheet 1 discharged from the rail 10. , Folded between the upper transport belt 9 and the box
And a glue gun 15 that attaches an adhesive to a margin 14 of the cardboard sheet 1.
Immediately downstream of the glue gun 15, an inspection device 16 that detects the amount of the adhesive in the margin 14 is provided. Further, a marking gun 17 that sprays ink on the bent edge of the corrugated cardboard sheet 1 where the excess or deficiency of the adhesive is detected is provided downstream of the inspection device 16. The ink used for the marking gun 17 may be of a type that loses its color over time.

As shown in FIG. 3, below the glue gun 15, a leaf spring 18 for adjusting the gap between the tip of the glue gun 15 and the glue margin 14 is arranged. Inspection device 1
6 has electrodes 19 arranged above and below a pass line through which a horizontal glue margin 14 before bending passes, detects the amount of adhesive by a change in capacitance between the electrodes 19, and determines whether the amount of adhesive is excessive or insufficient. It is to judge. The upper and lower limits of the amount of the adhesive are set in the inspection device 16 in advance. When the detected amount of the adhesive is out of the range of the upper and lower limits, an operation signal is output to the marking gun 17. I do. This operation signal is output in consideration of the transfer time of the cardboard sheet 1 from the inspection device 16 to the marking gun 17.

As shown in FIG. 4, the folder gluer 3
The box prototype 2 which is circularly adhered and folded by the hopper 4
And the rectangularity is corrected along the periphery of the side wall of the hopper 4. Box prototype 2 stacked in hopper 4
Is discharged from the bottom of the hopper 4 by the discharge conveyor 5,
It is transported to the pile device 7. Near the end of the discharge conveyor 5, an optical monitoring sensor 20 for monitoring the bent edge of the box prototype 2 on the side where the marking gun 17 is installed is installed from the side. The monitoring sensor 20 is connected to an alarm lamp 21 installed at the position of the stacking device 7 described later, and when the marking 22 applied by the marking gun 17 is detected on the bent edge of the box prototype 2, the alarm lamp 21 is activated. Light up to inform the operator. In addition, the installation place of the alarm lamp 21 can be suitably selected, and may be installed in a cab or the like of a production line.

The stacking device 7 includes a feed belt 23 for feeding the box prototype 2 from the discharge conveyor 5 below the crest 6 of the box prototype 2, a stopper 24 for the box prototype 2 fed by the feed belt 23, and A lifter 25 that lifts a predetermined number of the peaks 6 of the box prototype 2, and a pusher 26 that repeats the operation of pushing the lifted peaks 6 onto the delivery conveyor 8 and then returning to the original position. ing. The peaks 6 of the box prototype 2 extruded onto the delivery conveyor 8 are slowly conveyed toward the binding device. The worker notified of the presence of the box prototype 2 with the excess or insufficient adhesive by the alarm lamp 21 removes the box prototype 2 with the marking 22 present on the mountain 6 pushed out by the pusher 26, as shown in FIG. After confirmation, this box prototype 2 is removed from the pile 6 extruded on the conveyor 8.

In the above-described embodiment, the presence of the original box in which the marking is detected by the monitoring sensor is notified to the worker by the alarm lamp. (Rejection device) and the operation of removing the original box can be automated. In addition, the installation position of the monitoring sensor can be selected at an arbitrary position downstream of the straightening means according to the form of the production line.

[0016]

As described above, the apparatus for generating an excess / deficiency signal of the adhesive on the box body according to the present invention detects the excess / deficiency of the adhesive attached to the glue margin with the inspection device, and detects the excess / deficiency of the adhesive. Marking is performed on the corrugated cardboard sheet in which excess or deficiency has been detected, and this marking is monitored at a predetermined position downstream of the correcting means, and when an original box with the marking is detected, an adhesive excess or deficiency signal is generated. As a result, a defective box prototype due to excess or deficiency of the adhesive can be reliably eliminated without a dedicated worker.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a production line provided with an adhesive excess / deficiency signal generator according to an embodiment.

2 is a partially cutaway perspective view showing the folder gluer of FIG. 1;

FIG. 3 is an enlarged front view of a main part of the folder gluer of FIG. 1;

FIG. 4 is an enlarged front view of a portion excluding a folder gluer in FIG. 1;

FIG. 5 is a front view showing an operation state of the pile device of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated cardboard sheet 2 Box prototype 3 Folder gluer 4 Hopper 5 Conveyor 6 Mountain 7 Stacking device 8 Conveyor 9 Conveyor belt 10 Rail 11 Ruled line 12 Folding rod 13 Conveyor belt 14 Glue 15 Glue gun 16 Inspection device 17 Marking gun 18 Plate spring 19 Electrode Reference Signs List 20 sensor 21 alarm lamp 22 marking 23 feed belt 24 stopper 25 lifter 26 pusher

Continuation of the front page (72) Inventor Hideo Nishio 2-5-2-5 Umeda, Kita-ku, Osaka Rengo F-term in the head office (reference) 3E075 AA09 AA17 BA02 CA01 DA04 DA05 DA15 DC15 DC44 DD02 DD10 DD32 DD45 DE23 FA06 FA12 GA04

Claims (1)

[Claims] 1. A sheet provided with a folding ruled line or a glue margin provided is folded in an annular shape along the ruled line while being conveyed, and an adhesive is attached to the glue margin by an adhesive attaching device to form a ring. A folder gluer for bonding both ends of the folded sheet with this glue margin and processing it into a flat folded box original form, and a correcting means for correcting the rectangularity of the box original form discharged from this folder glue, A discharge conveyor for discharging the box prototypes from the straightening means, a stacking device for stacking the box prototypes conveyed by the discharge conveyor on a predetermined number of piles, and a delivery conveyor for sending out the piles of the box prototypes discharged from the stacking device In the box prototype manufacturing line in which are sequentially arranged, an inspection device that detects excess or deficiency of the adhesive attached to the glue margin is provided downstream of the adhesive attaching device of the folder gluer. On the downstream side of this inspection device,
A marking device that performs marking on a sheet in which the amount of adhesive is detected by the inspection device is provided, and a detection device that detects a marking applied to the sheet is provided at a predetermined position downstream of the correcting unit. When the detecting device detects the marked box prototype, a means for generating a signal indicating the excess or deficiency of the adhesive to the box prototype is provided. Adhesive over / under signal generator.