JP3989426B2 - Box sealing defect inspection device - Google Patents

Description

  The present invention relates to a box sealing failure inspection apparatus.

  In a detergent paper box or the like, after a box is filled with contents, an adhesive such as hot melt is attached to the box in a sealing machine, and a lid is bonded to the box via this adhesive.

In order to ensure the adhesion of the lid to the box, Patent Document 1 discloses a technique for determining the adhesion quality of hot melt to the box based on the detection result of the sensor.
JP-A-6-263118

  The prior art determines the adhesion quality of hot melt to the box before the lid is bonded, and does not inspect the actual sealing failure of the lid bonded to the box. poor.

  An object of the present invention is to inspect 100% of the actual sealing failure of the lid bonded to the box with high productivity, high accuracy and high probability.

A first aspect of the present invention is a box sealing failure inspection device in which a lid is bonded to a box, and includes a box conveyance device that conveys the box and a lid adsorbing tool, and the lid adsorbing device is arranged in the box conveyance path. A lid, a lid adsorber moving device that circulates along a lid holding path that is separated from the box transport path following the lid adsorbing path, and a lift that the lid adsorber on the lid holding path exerts on the lid A lid detection sensor that detects the upper surface of the lid that is peeled off from the box body by force and a lid detection sensor along the box transport path, and that the box has reached the detection position by the lid detection sensor And a suction release sensor for releasing the suction of the lid by the lid suction tool.

  The sealing failure inspection device 10 of FIGS. 1 and 2 inspects the presence or absence of sealing failure in the box 1. The box 1 is a sealing machine 11 in which a lid 3 is bonded to a box body 2. For example, an adhesive such as hot melt or vinyl acetate glue in which a sealing piece 4 provided on the lid 3 is attached to the side surface of the box body 2. It adheres to. The box 1 may be one in which one side around the lid 3 is hinged to the box 2.

  The sealing failure inspection device 10 includes a box transport device 20, a lid suction tool moving device 30, a box body holding device 40, a lid detection sensor 50, and a suction release sensor 60.

  The box conveying device 20 is composed of, for example, a plurality of endless circular belt conveyors 21 connected in series connected to the outlet side of the sealing machine 11, and the boxes 1 sealed by the sealing machine 11 are sequentially, at a constant pitch P, and Conveys continuously at a constant conveying speed.

  The lid adsorbing tool moving device 30 includes an endless circular chain 32 (sprocket wheel 33) provided with a plurality of lid adsorbing tools 31 at a constant pitch (the conveying pitch P of the box 1 by the box conveying device 20). The lid adsorbing tool 31 is composed of, for example, a vacuum pad supplied with negative pressure, and makes it possible to adsorb the upper surface of the lid 3 in the box 1 on the conveyance path of the box conveyance device 20.

  The lid adsorber moving device 30 sets the lid adsorber 31 in a continuous adsorbing state with respect to the lid 3 of the box 1, while the lid adsorber 31 is placed in the lid adsorbing path La and the lid holding path following the lid adsorbing path La. It circulates in synchronization with the box transport device 20 along Lb. The lid adsorbing tool moving device 30 extends the chain 32 in which the lid adsorbing tool 31 is suspended in the lid adsorbing path La so as to be arranged in parallel above the box conveying path of the box conveying apparatus 20 (the upper surface of the belt conveyor 21). The lid suction tool 31 that is in a continuous suction state with respect to the lid 3 of the box 1 on the box transport path is moved in parallel to the box transport path. In the lid holding path Lb, the lid adsorbing tool moving device 30 wraps the chain 32 on which the lid adsorbing tool 31 is suspended around the sprocket wheel 33 and is still in the adsorbing state with respect to the lid 3 of the box 1 on the box conveyance path. The lid adsorbing tool 31 is gradually separated upward from the box conveyance path, and a lifting force is applied to the lid 3 of the box 1.

  In the process of transporting the box 1 by the box transport device 20, the box body holding device 40 moves the box body 2 on the transport surface of the box transport device 20 (belt) against the lifting force that the lid adsorbing tool 31 exerts on the lid 3 of the box 1. It is held on the upper surface of the conveyor 21 to prevent the box body 2 from rising. The box body holding device 40 of the present invention includes left and right side belt devices 41 and 41 that are arranged on both sides of the box transfer path of the box transfer device 20 and circulate in synchronization with the box transfer device 20. The side belt device 41 sandwiches both side portions of the box body 2 that is transported along the box transport path of the box transport device 20. The belt conveyor 21 of the box conveying device 20 may be a vacuum belt provided so that a large number of small holes are scattered so that the bottom surface of the box body 2 can be sucked and held, and the vacuum belt can be used as the box body holding device 40.

  The lid detection sensor 50 is provided on the exit side of the box conveyance device 20, and the lid suction tool 31 in the lid lifting path Lb of the lid suction tool moving device 30 is lifted by the lifting force exerted on the lid 3 of the box 1. 3, the upper surface of the lid 3 peeled off from the box 2 is detected because of poor adhesion to the box 2. The lid detection sensor 50 includes, for example, a pair of optical sensors 51 disposed so as to face both sides of the box conveyance path of the box conveyance device 20, and the optical sensor 51 is attached to the box 2 on the conveyance surface of the box conveyance device 20. It is disposed above the upper surface level of the lid 3 that is normally bonded. When the pair of optical sensors 51 are shielded from light by the lid 3, the lifting state of the lid 3 is detected.

  The suction release sensor 60 is installed on the outlet side of the lid detection sensor 50 of the box transport device 20, detects that the box 1 has reached the detection position by the lid detection sensor 50, and a lid suction tool based on the detection result. The suction of the lid 3 by the lid adsorbing tool 31 is released by shutting off the negative pressure supply to 31 and supplying the positive pressure. The suction release sensor 60 includes, for example, a pair of optical sensors 61 arranged so as to face both sides of the box transport path of the box transport device 20. Placed in the level. When the lid adsorbing tool 31 enters the lid adsorbing path La again, the continuous adsorbing state with respect to the lid 3 is resumed.

Therefore, the sealing failure inspection of the box 1 by the sealing failure inspection device 10 is performed as follows.
(1) In the process of transporting the box 1 with the lid 3 bonded to the box 2 by the sealing machine 11 through the box transport path of the box transport device 20, the lid suction tool 31 of the lid suction tool moving device 30 transports the box. The lid 3 is sucked in the lid suction path La parallel to the box transport path of the apparatus 20.

  (2) When the lid adsorber 31 of the lid adsorber moving device 30 enters the lid holding path Lb that follows the lid adsorption path La and rises, the lid 3 that is normally bonded to the box 2 is the lid adsorber. It departs from the adsorption force of 31 (FIG. 3). On the other hand, the lid 3 with poor adhesion is peeled off and lifted from the box 2 by the adsorption force of the lid adsorbing tool 31, and is detected by the lid detection sensor 50 (FIG. 4).

  (3) On the condition that the suction release sensor 60 detects that the box 1 has reached the detection position by the lid detection sensor 50 in the above (2), the lid suction tool 31 releases the suction to the lid 3. Thereby, the box 1 having the lid 3 in which the adhesion failure is detected in the above (2) is rejected by the box conveying device 20, and the box 1 having the normal lid 3 is shipped by the box conveying device 20.

According to the present embodiment, the following operational effects can be obtained.
(Claim 1)
a The lid adsorbing tool 31 that has adsorbed the lid 3 in the lid adsorbing path La of the lid adsorbing tool moving device 30 moves in the lid adsorbing path La in synchronization with the box conveying speed by the box conveying apparatus 20 and then enters the lid lifting path Lb. Rise. The lid 3 with poor adhesion is peeled off and lifted from the box 2 by the suction tool 31, detected by the lid detection sensor 50, and the box 1 of the lid 3 is rejected. The lid suction tool 31 is released from the suction of the lid 3 by the suction release sensor 60 and is circulated.

  It is intended to inspect the adhesive force itself of the lid 3 adhered to the box body 2 in synchronization with the conveyance speed of the box 1 on the conveyance path of the sealed box 1, and the productivity and reliability of the sealing inspection of the lid 3 Can be improved.

(Claim 2)
b Since the lid holding device 40 holds the box body 2 against the lifting force exerted on the lid 3 by the lid adsorbing tool 31, the lid adsorbing tool 31 lifts the entire box 1 even if it is a lightweight box 1. Thus, erroneous detection that the lid detection sensor 50 detects the lid 3 can be avoided.

(Claim 3)
c The box body holding device 40 can be simply configured by the left and right side belt devices 41 that sandwich both side portions of the box body 2.

FIG. 1 is a side view showing a sealing failure inspection apparatus. FIG. 2 is a plan view taken along line II-II in FIG. FIG. 3 is a side view showing a non-defective product inspection state by the sealing failure inspection device. FIG. 4 is a side view showing a defective product inspection state by the sealing failure inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box 2 Box 3 Lid 10 Sealing defect inspection apparatus 20 Box conveyance apparatus 30 Lid adsorber moving apparatus 31 Lid adsorber 40 Box body holding apparatus 41 Side belt apparatus 50 Lid detection sensor 60 Adsorption release sensor

Claims (3)

A box sealing defect inspection device with a lid bonded to a box body,
A box transport device for transporting the box;
A lid adsorber moving device that includes a lid adsorber and circulates and moves along a lid adsorbing path in which the lid adsorber is arranged in the box conveying path and a lid holding path that is separated from the box conveying path following the lid adsorbing path When,
A lid detection sensor for detecting the upper surface of the lid lifted off by peeling from the box body by the lifting force exerted on the lid by the lid adsorbing tool in the lid lifting path;
Of the box having a suction release sensor installed on the outlet side of the lid detection sensor along the box transport path, detecting that the box has reached the detection position by the lid detection sensor, and releasing the suction of the lid by the lid suction tool Sealing defect inspection device.   The box sealing failure inspection device according to claim 1, further comprising a box holding device that holds the box against a lifting force exerted on the lid by the lid adsorbing tool.   The box sealing failure inspection device according to claim 2, wherein the box holding device includes left and right side belt devices that sandwich both side portions of the box conveyed along the box conveyance path.

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