JP5470057B2 - Can lid reversal detection device - Google Patents

Description

  The present invention relates to a reversal detection device for can lids stacked and housed in a sleeve.

  Conventionally, a substantially disc-shaped can lid that is wound around a can body in a so-called two-piece can or the like has a plurality of sheets in the same direction in a cylindrical kraft paper bag (hereinafter referred to as a paper sleeve) closed at both ends. It is conveyed in a state of being stacked and stored, and supplied to the winding device. However, some can lids may be reversed in an automatic bagging process in which can lids are stacked and stored in a paper sleeve. In the wrapping device, the stacked can lids are automatically taken out from the paper sleeve and supplied, and then tightened, so if the can sleeve that is upside down is mixed in the paper sleeve, it cannot be tightened. Problems such as process stoppage occur.

  For this reason, conventionally, in order to prevent the can lid from being supplied to the winding process in an inverted state, whether there is an apparatus for removing the inverted can lid from the transfer path, or whether the can lid is inverted in the paper sleeve. Devices for detection have been devised. For example, Patent Document 1 discloses an apparatus for removing a can lid that is inverted in a stacked state before being put in a bag from the transfer path.

  In Patent Document 2, a light beam is irradiated to a can lid in a stacked state before being accommodated in a paper sleeve, and the amount of light passing through a gap between the can lids is measured, and is generated by the inverted can lid. An apparatus for detecting inversion based on a difference in light amount is disclosed.

  In Patent Document 3, an inspector is brought into contact with a can lid positioned at an end of a laminated state in a sleeve, and the inversion of the can lid is detected from the detection result of the inspector according to the unevenness of the can lid. An apparatus is disclosed.

  In Patent Document 4, a laminated can lid is sandwiched in a laminating direction from both ends in a paper sleeve, and the state of the can lid positioned at the end is detected by a non-contact sensor such as a magnetic sensor. An apparatus for detecting the presence or absence of inversion of the can lid of a part is disclosed.

Japanese Patent Laid-Open No. 7-17621 JP 2007-99350 A JP-A-6-122432 JP 2000-177719 A

  However, in the devices described in Patent Documents 1 and 2, since the inverted can lid is detected or removed before bagging, the can lid is inverted during subsequent transport or bagging. The paper sleeve containing the inverted can lid cannot be found or eliminated.

  On the other hand, in the apparatus described in Patent Document 3, the reversal lid in the paper sleeve is detected, but the paper sleeve may be torn due to contact of the inspector. The apparatus described in Patent Document 4 uses a non-contact sensor, so there is little risk of damaging the paper sleeve, but there is a problem that the detection accuracy is low when the paper sleeve is bent.

  In addition, since the apparatus described in Patent Documents 3 and 4 only inspects the front and back of the can lid positioned at the end of the stacked state, if the end of the can lid is not reversed, it is made of paper. The can lid that is inverted inside the sleeve cannot be detected. Furthermore, in the apparatuses described in Patent Documents 3 and 4, since the paper sleeve in which the can lid is stored must be transferred from the conveyance path to another apparatus and inspected, the apparatus becomes large-scale and inspection takes time. There is a problem in that the manufacturing efficiency is lowered due to the increase in the cost.

  The present invention has been made in view of such circumstances, and an object thereof is to reliably detect the presence or absence of inversion in a can lid accommodated in a laminated state in a sleeve without damaging the sleeve.

The present invention relates to a sleeve that is wound around a can body having a cylindrical can body, and is accommodated in a state where disk-like can lids having curl portions for tightening on the outer periphery are laminated in a unified manner. A can lid reversal detection device for detecting the can lid with its front and back reversed without contacting the sleeve, wherein the sleeve containing a plurality of can lids in a stacked state is disposed in the stacking direction of the can lids. And an infrared irradiation unit that irradiates infrared rays that pass through the sleeve and do not pass through the can lid in a direction that intersects the stacking direction toward the outer periphery of the sleeve that is conveyed on the conveyor. And an infrared detecting section that detects the infrared light that has passed through the sleeve through a gap formed between the curled portions of the can lids adjacent in the inverted state .

  In this detection device, utilizing the fact that the interval between the can lids that are normally stacked, and the interval between the can lid that is inverted and stacked and the can lid that is normally stacked are different at the position of the curled portion, By passing infrared rays through the space between the can lids, the inverted can lid can be detected. According to this detection device, since the inversion of the can lid is detected using infrared rays that pass through the paper sleeve, it is possible to detect the presence or absence of the inversion for the entire stacked can lids without contacting the paper sleeve. it can.

  According to the can lid inversion detection device of the present invention, the inversion of the laminated can lid accommodated in the sleeve can be reliably detected without being damaged even if the sleeve is made of paper.

It is a top view which shows the apparatus which includes the inversion detection apparatus which concerns on this invention, and performs from the bag packing of a can lid to palletizing. It is sectional drawing which shows the inversion detection of the can lid by the inversion detection apparatus shown in FIG. It is sectional drawing which shows the can lid inspected by the inversion detection apparatus.

  Hereinafter, an embodiment of a can lid inversion detection device according to the present invention will be described. The inversion detection device 100 of the present invention is a can lid in which a disk-shaped can lid 10 wound around a cylindrical can body is accommodated in a state where the front and back are stacked in a unified state. 10 is detected.

  As shown in FIG. 1, the inversion detection device 100 folds the both ends of the sleeve 20 in a state where the can lid 10 is accommodated by the bag filling device 70 that accommodates the can lid 10 in the cylindrical sleeve 20. And a palletizer 90 which packs a plurality of sleeves 20 whose openings are closed by the bag binding device 80 on a pallet.

  The inversion detection device 100 is provided between the bag binding device 80 and the palletizer 90. When the can lid 10 is sent from the bag binding device 80 to the palletizer 90 by the conveyor 30, the stacked can lids 10 are sleeved. The test is carried out in the state accommodated in 20.

  In the bag filling device 70, the can lids 10 stacked in a state where the front and back sides are matched are accommodated in the sleeve 20. However, since at least one end of the sleeve 20 is open until the both ends are closed by the bag binding device 80, the can lid 10 may be reversed in the sleeve 20 due to vibration or impact of conveyance. is there. For this reason, in order to perform an inspection in a state where both ends of the sleeve 20 are closed and the front and back states of the can lid 10 are fixed, the inversion detection device 100 is provided at the rear stage of the bag binding device 80.

  The inversion detection device 100 includes a conveyor 30 that conveys a sleeve 20 that accommodates a plurality of can lids 10 in a stacked state, and a stacking direction of the can lids 10 and a conveyance direction of the conveyor 30 for the sleeve 20 that is conveyed on the conveyor 30. Aligning means 40 for aligning them so as to match, an infrared irradiation unit 50 for irradiating infrared R crossing the stacking direction toward the sleeve 20 conveyed on the conveyor 30, and infrared R transmitted through the sleeve 20 are detected. An infrared detector 60.

  In this inversion detection device 100, the sleeve 20 containing the can lid 10 is conveyed by the conveyor 30 from the bag binding device 80 as shown in FIG. When the sleeve 20 placed on the conveyor 30 passes through the alignment means 40 provided in the middle of the conveyance path, the can lid 10 is arranged so that the stacking direction of the can lids 10 matches the conveyance direction of the conveyor 30. Are aligned in a substantially straight line.

  The infrared irradiation part 50 and the infrared detection part 60 are arrange | positioned so that the conveyor 30 may be pinched | interposed. As shown in FIG. 2, the infrared irradiation unit 50 irradiates the infrared ray R substantially orthogonal to the conveying direction of the conveyor 30 so as to pass through a position close to the conveyor 30 in a substantially horizontal direction. Since the infrared ray R passes through the sleeve 20 and does not pass through the can lid 10, the infrared detector 60 can detect the passage of the can lid 10 by detecting the infrared ray R.

  Here, the shape of the can lid 10 inspected in the inversion detection device 100 will be described. As shown in FIG. 3, the can lid 10 includes a flat disk-shaped panel portion 10a, and a groove-shaped counter sink 10b provided on the outer peripheral portion of the panel portion 10a so as to protrude toward the inner surface. The curl portion 10c provided on the outer peripheral portion of the counter sink 10b and protruding opposite to the counter sink 10b is formed in a disc shape. The can lid 10 is attached to the can body 11 by being wound with the curled portion 10c overlapped on the flange portion 11a of the can body 11 having a cylindrical can body.

  As shown in FIG. 2, when the can lids 10 are stacked in the sleeve 20 in a state where the front and back sides are matched, no large gap is formed between the adjacent can lids 10. However, when the can lid 10 whose front and back are reversed is mixed, the counter sinks 10b of the adjacent can lids 10 are in contact with each other in a reversed state, and a large gap is formed between the curled portions 10c.

  The inversion detection apparatus 100 detects the sleeve 20 mixed with the inverted can lid 10 by detecting the large gap formed between the curled portions 10 c on the outer peripheral portion of the can lid 10 in this way. That is, as shown in FIG. 2, the sleeve 20 in which the can lid 10 is accommodated is conveyed by the conveyor 30, and the infrared rays R are irradiated toward the lower side portion of the sideways sleeve 20. Therefore, the sleeve 20 in which the can lid 10 is accommodated moves while blocking the infrared ray R in a portion where the inverted can lid 10 does not exist. That is, since the infrared ray R1 blocked by the can lid 10 is not detected by the infrared ray detection unit 60, the detection of the infrared ray R by the infrared ray detection unit 60 is interrupted, so that the passage of the can lid 10 is detected. However, when the inverted can lid 10 is mixed in the sleeve 20, the infrared ray R2 passing through the gap between the curled portions 10c is not blocked as shown in FIG. . By detecting the infrared ray R in this way, the sleeve 20 mixed with the inverted can lid 10 can be detected.

  When a plurality of sleeves 20 containing the can lids 10 are continuously inspected, the infrared ray R2 that has passed through the gap between the inverted can lids 10 and the infrared ray R that has passed between the sleeves 20 that are continuously conveyed are used. In order to make a distinction, it is desirable that the conveying interval of the sleeve 20 be a certain size or more. Since the gap formed by the inverted can lid 10 has a certain size, the infrared rays that have passed through the gap due to the inverted can lid 10 are secured by changing the length of time for detecting the infrared ray R while ensuring the conveyance interval. It can be distinguished whether it is R2.

  As described above, according to the inversion detection device of the present invention, by using infrared rays, non-contact inspection can be performed and the paper sleeve is not damaged. Moreover, since the inversion detection device of the present invention has a simple configuration and can be provided in the middle of the can lid conveyance path, an increase in inspection cost can be suppressed. In addition, since inspection after bag binding is possible, there is no risk of reversal of the can lid after inspection, the can lid is reliably detected, and the sleeve in which the reversed can lid is mixed is sent to the subsequent process. Can be prevented.

DESCRIPTION OF SYMBOLS 10 Can lid 10a Panel part 10b Counter sink 10c Curl part 11 Can body 11a Flange part 20 Sleeve 30 Conveyor 40 Alignment means 50 Infrared irradiation part 60 Infrared detection part 70 Bag filling apparatus 80 Bag binding apparatus 90 Palletizer 100 Inversion detection apparatus R, R1 , R2 infrared

Claims (1)

In a sleeve that is wound around a can body having a cylindrical can body, and in which a disc-shaped can lid having a curled portion for tightening on the outer peripheral portion is stacked in a unified state, the front and the back A can lid reversal detection device for detecting the can lid reversed without contacting the sleeve,
A conveyor that conveys the sleeve containing the plurality of can lids in a stacked state along the stacking direction of the can lids;
An infrared irradiation unit that irradiates infrared rays that pass through the sleeve and do not pass through the can lid toward the outer peripheral portion of the sleeve that is conveyed on the conveyor in a direction that intersects the stacking direction;
An inversion detection of the can lid, comprising: an infrared detection unit that detects the infrared ray that has passed through the gap and formed through the gap formed between the curled portions of the adjacent can lids in the inverted state. apparatus.

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