JP2019094094A - Wraparound caser - Google Patents

Abstract

To provide a wraparound caser capable of preventing an article group in a wraparound case in which packaging failure occurs, from coming apart.SOLUTION: A wraparound caser 10 folds a wraparound sheet R on whose bottom surface an article group G is mounted, and packages the article group G into a box-shape. The wraparound caser detects occurrence of molding abnormality of the wraparound sheet R into a box-shape by first to fifth sensors 27, 38, 46, 47, 48, and a control part performs error processing based on a detection result of the sensors. On each of both side parts of a transport path of a wraparound sheet transport conveyor 16, a temporary fastening device 40, 50 for sticking a temporary fastening seal from a side to the wraparound sheet R is provided. In the error processing, after the temporary fastening seal is stuck to the wraparound sheet R on the wraparound sheet transport conveyor 16, the wraparound sheet R is discharged by a pusher 51 for reject on a downstream side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wrap round case for folding a group of articles placed on a bottom flap into a box shape by folding the wrap round sheet.

  In the wrap round case, a plurality of containers (container groups) are placed upright and in close contact on the bottom flaps of the wrap round sheet, and in that state, each flap is folded along a folding line to package the container groups in a box shape Do. At this time, the flaps are adhered to each other by the adhesive applied to the flaps, whereby the box shape of the wrap round sheet is maintained and the packaging of the container group is completed. However, in the flap bending operation, if the flap is not bent in the proper direction, for example, it is bent in the reverse direction, packaging of the container group is not properly performed, resulting in packaging failure. In response to such problems, the sensor detects that the flap has been bent beyond the specified angle, stops the packaging process, reports an error occurrence, notifies the upper controller of the error occurrence, and concerns the error occurrence. An apparatus has been proposed which performs error processing such as specifying a case (box material) and attaching a mark to the case (see Patent Document 1).

Patent No. 4515965 gazette

  By the way, in the defective packaging, the periphery of the container group is not firmly held by the side flaps. Therefore, when the packaging defective product is discharged as it is, the container group in the container is scattered and the collection becomes difficult. In the conventional configuration including the patent document 1, when an error is detected, the packaging operation in the lap round caser is stopped, and it is necessary for the operator to manually remove the case in which the packaging defect has occurred together with the container group. Waste time and increase operating costs.

  An object of the present invention is to provide a wrap-round case that can prevent the articles in the wrap-round case in which the packaging failure has occurred from falling apart.

  According to a first aspect of the present invention, there is provided a wrap-round case comprising an article supply means for supplying a group of articles on the bottom surface of a wrap-round sheet, and a front side surface and a rear side surface continuously connected to the bottom surface. A wrap round sheet transport conveyor for transporting the wrap round sheet in a state of being erected so as to face each other, and provided on both sides of a transport path of the wrap round sheet transport conveyor and continuously provided on the front side surface A front side flap folded inward and a side guide connected to the rear side and engaged with the rear side flap folded inward, a front side flap and a rear side flap, or a top surface Adhesive supply means for supplying adhesive to top side flaps connected in series and bottom side flaps connected in series to the bottom And said adhesion means for adhering said bottom side flaps and said front and rear side flaps by said adhesive by bending said bottom side flaps and pressing said front and rear side flaps, said plate being expanded in a planar shape In a wrap round case for forming a wrap round sheet into a box shape and wrapping an article group placed on the bottom surface, a sensor for detecting the occurrence of abnormal molding of the wrap round sheet into a box shape, and the sensor Control means for performing error processing on the basis of the detection results of the above, and seal member sticking means disposed on both sides of the transport path of the wrap round sheet transport conveyor and sticking a seal member from the side toward the wrap round sheet In the error processing, a lap round sheet conveyance conveyor is provided. The wrap around sheet is characterized in that it is discharged from the downstream side from the affixing said seal member to wrap around the seat.

  According to the present invention, it is possible to provide a wrap-round case capable of preventing the articles in the wrap-round case in which the packaging failure has occurred from coming apart.

It is a perspective view showing an outline of a lap round case which is one embodiment of the present invention. It is a side view of the lap | wrap round sheet | seat conveyer used for the lap | wrap round caser of FIG. It is an expanded view of the wrap round sheet | seat used with the wrap round caser of this embodiment. It is a top view of the temporary fastening apparatus of this embodiment. It is the side view which stuck the temporary fastening seal to the case where packaging defect generate | occur | produced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the outline of a wrap round case according to an embodiment of the present invention, and FIG. 2 is a side view of a wrap round sheet conveying conveyor. Moreover, FIG. 3 is a top view in the unfolded state of the wrap round sheet | seat used with the wrap round caser of this embodiment.

  The wrap round case 10 of the present embodiment is an apparatus for packaging an article group in which a plurality of articles are gathered together in a box shape with one wrap round sheet R. An article is, for example, a bottle-shaped container V, and is supplied by an article supply conveyor (article supply means) 12 as an article group G in units of a predetermined number of containers V. In the illustrated example, 12 containers V constitute an article group G aligned in four vertical rows and three horizontal rows in an upright and close state. The group of articles G is pushed forward on the transport surface by a flight bar 12F which is bridged by endless chains 12C installed on both sides of the article supply conveyor 12 at a predetermined interval.

  On the downstream side of the article supply conveyor 12, the wrap round sheet conveyance conveyor 16 is disposed with the sheet delivery unit 14 receiving the wrap round sheet R from the sheet supply unit, and the sheet delivery unit 14 includes an upstream fixed plate 14F and A downstream slide plate 14P is provided. The slide plate 14P is at a first position where the upstream end thereof slides down below the fixed plate 14F in a slightly inclined state, and the downstream end of the slide plate 14P is upstream of the wrap round sheet transport conveyor 16 in a horizontal state. It is reciprocally movable between a second position adjacent to the end.

  The wrap round sheet R is supplied in a state of being bent in an L shape from the side of the sheet delivery unit 14 with the slide plate 14P being disposed at the first position. The slide plate 14P moves the slide plate 14P from the first position to the second position in synchronization with the container group G transported to the downstream end of the fixed plate 14F by the flight bar 12F, thereby the flight bar The container group G on the fixed plate 14F pushed out by 12F is transferred to the upper surface of the slide plate 14P.

  The slide plate 14P changes the posture from the inclined state at the first position to the horizontal state gradually as it goes to the second position, and the upper surface of the bottom surface of the wrap round sheet R supplied to the sheet delivery unit 14 Moved to When the slide plate 14P reaches the second position, the slide plate 14P is positioned above the bottom surface of the wrap round sheet R supplied to the sheet delivery unit 14 in a horizontal state.

  Thereafter, the slide plate 14P starts to move to the first position, and the container group G on the slide plate 14P is continuously pushed out in the transport direction by the flight bar 12F and sequentially transferred to the bottom of the wrap round sheet R. Be done. The wrap round sheet R to which the article group G is transferred in synchronization with this is a wrap on the downstream side in a state where the front row of the article group G abuts on the upright portion of the wrap round sheet R bent in an L shape. It is delivered to the round sheet transport conveyor 16. As will be described later, in the wrap round sheet conveying conveyor 16, the wrap round sheet R on which the article group G is placed is further bent around the article group G, and the side flaps are glued to each other. An article group G is packaged in a box shape.

  The wrap round sheet R corresponds to, for example, a development of a rectangular solid, and in the present embodiment, takes on the shape shown in the development view of FIG. 3. In FIG. 3, the wrap round sheet R is divided into a rectangular top surface P1, a front side surface P2, a bottom surface P3 and a rear side surface P4 connected by three parallel ruled lines (folding lines) L1 to L3. Paired top surface side flaps F1 are provided on opposite sides of the top surface P1, and front side flaps F2 forming a pair are provided on opposite sides of the front side surface P2, the bottom surface P3 and the rear side surface P4. A bottom side flap F3 and a rear side flap F4 are provided. A seam flap F5 is provided on a side opposite to the bottom surface P3 in the rear side surface P4 via a ruled line L4 parallel to the ruled line L3.

  The wrap round sheet R supplied to the sheet delivery unit 14 is bent at a right angle along a crease L2 defining the boundary between the front side surface P2 and the bottom surface P3 to be L-shaped, and a surface including the top surface P1 and the front side surface P2 In the upright state, the sheet is supplied to the sheet delivery unit 14 in a posture in which the same surface is located on the downstream side in the transport direction. The group of articles G is transferred onto the wrap round sheet R supplied to the sheet delivery unit 14 according to the above-described procedure, and the container V in the front row is in contact with the front side surface P2 to the wrap round sheet transport conveyor 16 It is delivered.

  When the wrap round sheet R on which the group of articles G is loaded is delivered to the wrap round sheet transport conveyor 16, the top surface P1 is set by the top folding guide 18 (see FIG. 2) disposed above the wrap round sheet transport conveyor 16. The top surface P1 is folded so as to cover the group of articles G along the crease L1 that delimits the front side P2. In addition, below the downstream side portion of the top folding guide 18, the top pressing pusher 18P that pushes the top P1 downward from above so that the top of the top P1 is positioned lower than the top of the seam flap F5. Is placed.

  Further, as shown in FIG. 2, the wrap round sheet transport conveyor 16 includes a pair of parallel endless chains 20 disposed along the transport direction, and on the outer periphery of the endless chain 20, a large number of fingers are spaced at a predetermined interval. 20F is provided. The finger 20F contacts the rear side surface P4 of the wrap round sheet R from the lower surface side, and bends the rear side surface P4 with respect to the bottom surface P3 so as to stand up along the crease L3. Further, the finger 20F pushes the rear side P4 which is erected from the rear side, and sequentially transports each wrap round sheet R on which the article group G is loaded to the downstream side at a constant interval.

  On both sides of the upstream end of the wrap-round sheet conveying conveyor 16, reciprocally rotatable flap folded pieces (rear flap raising means) 22 are provided (see FIG. 1). The flap folding pieces 22 engage from behind with the rear side flaps F4 extending outward from both sides of the rear side P4 erected by the fingers 20F, and move them forward (downstream in the transport direction), that is, inside the case Bend it in.

  Furthermore, side guides 24 are disposed on both sides of the transport path of the wrap round sheet transport conveyor 16 (see FIG. 1). The side guide 24 can be reciprocated in the transport direction and the width direction by the side guide drive mechanism 24M. Each of the side guides 24 is positioned outside the front side surface P4 in the width direction, and the front side flaps F2 extending outward from both sides of the upright front side surface P4 are side guides by the conveyance of the wrap round sheet R. By being pressed against the tip of 24, it is bent backward (upstream in the transport direction), that is, in the case.

  Thereafter, the side guide 24 is moved by a side guide drive mechanism 24M in the transport direction at a speed higher than that of the wrap round sheet R by a predetermined distance, and is separated by a predetermined interval. Parallel to this, the rear side flap F4 is bent forward (downstream side in the transport direction) by the flap bending piece 22. The rear side flap F4 folded forward by the flap folding piece 22 is inserted inside the side guides 24 spaced apart by a predetermined distance, and the rear side flap F2 folded backward and the rear side flap folded already forward The side guide 24 moves in the transport direction while sandwiching F4 from the side. That is, in a state where the front / rear side flaps F2, F4 are bent, the wrap round sheet R is fed between the fixed guides 25 on the wake side. Thereafter, the side guides 24 are returned from the separated state to their original intervals, move to the upstream side, and repeat the same processing. Only the side guide 24 and the side guide drive mechanism 24M on one side are illustrated in FIG.

  Through the above steps, as shown in FIG. 2, the front side P2 and the rear side P4 are erected (are erected so as to face each other across the article group G), and the top surface P1 covers the article group G. The front side flap F2 and the rear side flap F4 are bent while being covered. In this state, the top surface P1 is pushed down by the top surface pushing pusher 18P, and an adhesive is sprayed from the seam flap glue injection nozzle 26 on the rear surface of the seam flap F5 extending upward from the rear side surface P4.

  A pair of first sensors 27 is disposed on both sides of the transport path of the wrap round sheet transport conveyor 16 and downstream of the seam flap glue injection nozzle 26. The first sensor 27 determines whether the bent state of the front side flap F2 and the rear side flap F4 can properly bond the top side flap F1 and the bottom side flap F3 to the front side flap F2 and the rear side flap F4. Is a sensor for monitoring That is, it is detected whether any one of the front / rear side flaps F2 and F4 is folded in the opposite direction and opened outward, for example. For the first sensor 27, for example, a sensor that detects light from a light projection sensor in a light receiving sensor is used.

  A seam flap folding member 28 is provided at the same position as the first sensor 27 in the transport direction, and that is reciprocally rotatable in the front-rear direction (transport direction) above it. The seam flap folding member 28 engages with the seam flap F5 from the rear by rocking in the front-rear direction, and folds the seam flap F5 coated with the adhesive under the top surface P1. Before the seam flap F5 is folded below the top surface P1 by the seam flap folding member 28, the top surface P1 is moved to a position above the seam flap F5 by a guide (not shown), and the top surface P1 and the seam flap F5 Interference is prevented.

  On the downstream side of the seam flap interfolding member 28, an endless chain 30 having a plurality of front top guides 30A and a plurality of back top guides 30B alternately arranged along the transport surface is disposed above the wrap round sheet transport conveyor 16. Ru. The front top guide 30A and the rear top guide 30B move while holding the front edge and the rear edge of the top surface P1 with the seam flap F5 folded in from the front and rear. Under the endless chain 30, a top surface pressing roller 32 is disposed for pressing a roller against the top surface P1 of the wrapped round sheet R to be conveyed, and pressing the top surface P1 to the seam flap F5.

  In the section where the endless chain 30 provided with the front / rear top guides 30A and 30B is disposed, the top side flaps F1 are engaged on both sides of the wrap round sheet transport conveyor 16 to make them face downward A folding top surface side flap folding guide 34A is disposed along the top surface P1 of the wrap round sheet R. Further, a bottom side flap folding guide 34B engaging with the bottom side flaps F3 and bending them upward is disposed below the top side flap folding guides 34A along the bottom surface P3 of the wrap round sheet R. . The top and bottom side flaps F1 and F3 are bent while being conveyed in this section, and the wrap round sheet R is formed into a substantially box-like wrap round case.

  Side flap adhesive spray nozzles (adhesive supply means) 36 are provided in sections where top / bottom side flap folding guides 34A and 34B are provided on both sides of the transport path of the wrap round sheet transport conveyor 16. The side flap glue injection nozzle 36 sprays an adhesive toward the wrap round sheet R conveyed on the wrap round sheet conveyance conveyor 16 and applies the adhesive to the folded forward / backward side flaps F2, F4.

  In the section where the top / bottom side flap folding guides 34A and 34B are provided, the second sensor 38 is disposed on both sides of the conveyance path of the wrap round sheet conveyance conveyor 16 immediately downstream of the side flap glue injection nozzle 36 Be done. The second sensor 38 is a sensor that detects whether the adhesive is properly applied to the front and rear side flaps F2 and F4. The second sensor 38 is constituted by, for example, a radiation thermometer, and detects the temperature of the adhesive application area of the front / rear side flaps F2 and F4, and based on this, a heated and melted adhesive is applied to the side flaps Whether or not to detect.

  Furthermore, in the section where the top / bottom side flap folding guides 34A and 34B are provided, first temporary fixing described later on both sides of the transport path of the wrap round sheet transport conveyor 16 immediately downstream of the second sensor 38. An apparatus (sealing member attaching means) 40 is disposed. The first temporary fixing device 40 is driven based on the signals of the first and second sensors 27 and 38, and sideways toward the lap round sheet R carrying the article group G, for example, at the time of error processing described later. Attach a temporary seal at a position half the height of the top surface P1 or lower than that.

  Top and bottom side flaps The top and bottom side flaps F1 and bottom side flaps that are folded on both sides of the conveyance path of the wrap round sheet conveyance conveyor 16 are on the downstream side of the section provided with the folding guides 34A and 34B. A side pressure roller (adhesion means) 42 is disposed which presses the front side flap F2 and the rear side flap F4 to which the adhesive is applied. The side flaps F1 to F4 are glued by the side pressure roller (adhesive means) 42, whereby the box-type packaging of the group of articles G by the wrap round sheet R is completed. In the present embodiment, the top surface pressure contact roller 32 is disposed above the section where the side surface contact pressure roller 42 is disposed.

  On the downstream side of the side pressure roller 42, on both sides of the conveyance path of the wrap round sheet conveyance conveyor 16, side flaps F1 to F4 of the wrap round sheet R formed in a box shape are supported from both sides until the adhesive dries. A crimping plate 44 is provided, and on the downstream side, third to fifth sensors 46, 47, 48 for final check of the packaging defect of the wrap round sheet R are provided (see FIG. 1).

  The third sensor 46 is, for example, a reflected light receiving type sensor, and is disposed at the upper central portion of the wrap round sheet transport conveyor 16, and detects the protrusion of the seam flap F5 based on the presence or absence of the reflected light. The fourth sensor 47 is disposed to the side of the wrap round sheet conveyance conveyor 16 and is a sensor for checking the shape of the box-shaped wrap round sheet R, and sees the light shielding time according to the conveyance timing. Then, it is detected whether the folded wrap round sheet R is formed into a proper box shape. The fifth sensor 48 is a sensor for checking whether adhesion between the side flaps is properly performed and the top surface side flap F1 and the bottom surface side flap F3 on the left and right sides are properly folded, for example, a pair of reflection light receiving type It consists of sensors. The fifth sensor 48 is disposed above the lap round sheet transport conveyor 16 and is disposed outward in the width direction of the top surface P1. When either the top / bottom side flaps F1 or F3 is open, reflected light is detected. Ru. The light emitting / receiving sensor may be used as the third to fifth sensors 46, 47, 48.

  A second temporary fixing device (seal member attaching means) 50 is disposed downstream of the third to fifth sensors 46, 47, 48 and on both sides of the conveyance path of the wrap round sheet conveyance conveyor 16. As described later, the second temporary fixing device 50 has the same configuration as the first temporary fixing device 40, and based on the signals of the third to fifth sensors 46, 47, 48, substantially the same as the first temporary fixing device 40. Stick a temporary seal on the same place. The wrap round sheet R subjected to temporary fixing by the first or second temporary fixing device 40, 50, that is, the defective case is a wrap round sheet conveying conveyor by the reject pusher 51 located downstream of the second temporary fixing device 50. It is pushed out sideways from the 16 conveyance paths and discharged. The series of operations are controlled by a control unit (control means) 54 connected to each sensor and drive unit.

  FIG. 4 is a plan view showing the configuration of the first and second temporary fixing devices 40 and 50. As shown in FIG. The first and second temporary fixing devices 40 and 50, for example, include a base 52 for supplying a temporary fixing seal (seal member) S, and a linear actuator 55 for advancing and retracting the base 52 in the width direction of the wrap round sheet conveying conveyor 16. Prepare. The base 52 includes a base paper roll 52A in which a backing sheet M to which a temporary fixing seal S is attached is wound in a roll shape, a folding roller 52B which folds the backing sheet M into an acute angle and peels the temporary fixing seal S from the backing sheet M; A winding roll 52C for winding the backing sheet M from which the seal S has been peeled off, a motor 52M for rotating the winding roll 52C, and a temporary seal S peeled off by the folding roller 52B against the wrap round sheet R And a pressing roller 52R.

  The driving of the first tacking device 40 is based on the signals of the first and second sensors 27, 38, and the driving of the second tacking device 50 is based on the signals of the third to fifth sensors 46, 47, 48. To be done. That is, the linear actuator 55 is driven in synchronization with the conveyance of the defective case (lap round sheet R) detected by the sensor, and the base 52 is pushed out to the side surface of the defective case and the pressing roller 52R is on the side surface of the defective case. It is pushed. Further, the base sheet M is fed out from the base paper roll 52A by driving the motor 52M, and the temporary fixing seal S is peeled off from the base sheet M by the folding roller 52B and is stuck to the side of the defective case by the pressing roller 52R. The temporary seal S may be a tack seal which is a single sheet as shown in FIG. 5, but may be configured to cut out with a suitable length after feeding out a continuous tape.

  FIG. 5 is a side view in which the temporary fixing seal S is attached to the wrap round seal R (defective case) in which the packaging defect occurs. In FIG. 5A, the front side flap F2 and the rear side flap F4 are properly bent, but the top surface side flap F1 and the bottom side flap F3 are not properly bent. Indicates the attached condition. In FIG. 5 (b), although the front side flap F2 is properly bent, the temporary fastening seal S when the rear side flap F3, the top surface side flap F1, and the bottom side flap F3 are not properly bent. Indicates the paste status of

  In FIG. 5 (a), the temporary seal S is attached across the front side flap F2 and the rear side flap F4, and in FIG. 5 (b), only the front side flap F2 is properly bent, and the rear side flap F4 is Is open to the outside, the temporary seal S is stuck across the side of the container V from the front side flap F2.

  Next, the details of the error processing operation in the present embodiment will be described. The error processing is executed in the control unit 54 when an abnormality is detected based on the signals from the first to fifth sensors 27, 38, 46, 47, 48.

  First, when an abnormality is detected in the first and second sensors 27 and 38, the operation of the wrap round caser 10 including the wrap round sheet transport conveyor 16 is stopped. When the operator removes the clog due to the bending abnormality of the side flap and the like and the recovery button is pressed, the lap round sheet conveying conveyor 16 is reactivated, and the temporary tacking seal S is detected by the first tacking device 40. It is pasted in a bad case and temporary fastening is performed. Then, the defective case for which temporary fixing has been performed or a predetermined number of cases including the defective case (the number of cases remaining on the wrap round sheet conveying conveyor 16 at the time of abnormality detection) are lapped downstream by the pusher 51 for reject The sheet is discharged from the round sheet transport conveyor 16. The number of cases is counted by a third sensor disposed in front of the reject pusher 51. When the discharge of the case is completed, the error handling is completed, and the driving of the wrap round case 10 including the wrap round sheet conveying conveyor 16 returns to the normal operation.

  Next, when an abnormality is detected in the third to fifth sensors 46, 47, 48, the operation of the wrap round caser 10 including the wrap round sheet conveying conveyor 16 is stopped. When the operator removes the abnormality in the seam flap folding member 28 and the abnormality in the top side flap folding guide 34A and the like, and the recovery button is pressed, the lap round sheet transport conveyor 16 is reactivated and the second temporary fixing device The temporary fixing seal S is attached to the defective case in which the abnormality is detected by 50, and temporary fixing is performed. Then, the defective case for which temporary fixing has been performed or a predetermined number of cases including the defective case (the number of cases remaining on the wrap round sheet conveying conveyor 16 at the time of abnormality detection) are lapped downstream by the pusher 51 for reject The sheet is discharged from the round sheet transport conveyor 16. When the discharge of the case is completed, the error handling is completed, and the driving of the wrap round case 10 including the wrap round sheet conveying conveyor 16 returns to the normal operation.

  As described above, according to the wrap round case of the present embodiment, by temporarily fixing and discharging the wrap round case in which the packaging failure occurs, the group of articles is prevented from being separated at the time of discharge of the failure case. Be done. This makes it possible to automatically perform the discharge of the defective case using a device such as a pusher without human intervention.

  In the present embodiment, the packaging defect is detected using the first and second sensors disposed upstream and the third to fifth sensors disposed downstream, but the sensor is only downstream. May be Further, in the wrap round case according to the present embodiment, the group of articles is placed from the rear on the bottom surface of the wrap round sheet bent in an L shape. However, the present embodiment is also applied to a wrap-round case having a configuration in which a group of articles is placed from the lateral direction on the bottom of a wrap-round sheet bent U-shaped (with the rear side and the front side upright). It is possible.

10 wrap round case 12 article supply conveyor (article supply means)
14 sheet delivery part 16 lap round sheet conveyance conveyor 24 side guide 24M side guide drive mechanism 25 fixed guide 27 first sensor 36 side flap glue jet nozzle (adhesive supply means)
38 Second sensor 40, 50 Temporary fastening device 42 Side pressure roller (adhesion means)
46 third sensor 47 fourth sensor 48 fifth sensor 51 pusher for reject 54 control unit (control means)
F1 Top side flap F2 Front side flap F3 Bottom side flap F4 Rear side flap G Article group P1 Top side P2 Front side P3 Bottom side P4 Rear side R Wrap round seat S Temporary seal (seal member)
V container (article)

Claims (1)

Article supply means for supplying a group of articles onto the bottom of the wrap round sheet;
A wrap-round sheet transport conveyor configured to transport the wrap-round sheet in a state in which the front side surface and the rear side surface connected to the bottom surface are erected so as to face each other across the group of articles;
The front side flaps provided on both sides of the conveyance path of the wrap round sheet conveyance conveyor and continuously provided on the front side and bent inwardly are continuously provided on the rear side and bent inwardly Side guides that engage the rear side flaps,
Front side flaps and rear side flaps, or top side flaps connected to the top surface, and adhesive supply means for supplying an adhesive to the bottom side flaps connected to the bottom;
The lap spread in a flat form comprising an adhesive means for adhering the bottom side flaps and the front and rear side flaps by the adhesive by bending the bottom side flaps and pressing against the front and rear side flaps. In a wrap round case for forming a round sheet into a box shape and wrapping a group of articles placed on the bottom surface,
A sensor for detecting the occurrence of forming abnormality in the box shape of the wrap round sheet;
Control means for performing error processing based on the detection result of the sensor;
Seal member attaching means disposed on both sides of the conveyance path of the wrap round sheet conveyance conveyor, and sticking a seal member from the side toward the wrap round sheet;
In the error processing, the seal member is attached to a wrap round sheet on a wrap round sheet conveyance conveyor, and then the wrap round sheet is discharged from the downstream side.

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