JP2012025474A - Caser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caser wherein the corner surface of a corner cut carton can be formed in an appropriate shape even when the folding line cutting of a flap is weak.SOLUTION: In the caser 10, four corners of each of a top plate 2b and a bottom plate 2a are cut and chamfered sections 2d are formed, and an inner flap 3 is folded in two stages along the chamfered section 2d and a corner surface 5 is provided at each of corners. While a corner cut carton 1 having such a structure is being formed, a canned beverage C is housed and packaged in a carton. The caser includes: a molding roller 16 removable between a projecting position at which the roller projects to a conveyance area for conveying the carton 1 so that it may be brought into contact with the corner surface 5 of the carton 1 on a conveyor 11 and a retreating position at which the roller is retreated to the side of the conveyor 11 in a manner to retreat the outside of the conveyance area; and a corner surface formation mechanism 15 provided with a spring 23 for urging the molding roller 16 to the projecting position.

Description

  The present invention relates to a caser that wraps an object to be packed by accommodating an object to be packed such as a container in a carton in the middle of formation while forming a corner cut carton having a shape in which four corners of a rectangular parallelepiped are obliquely chamfered.

  A corner cut carton having a shape in which four corners of a rectangular parallelepiped are obliquely chamfered is known as a carton used for packaging an object to be packed such as a container (see, for example, Patent Document 1). The chamfered portion of the corner cut carton cuts four corners of the bottom plate and top plate of the carton at an angle, and each of four flaps (sometimes called inner flaps) connected to both ends of the side plate of the carton. It is formed by folding in two stages along the cut portions of the top plate and the bottom plate. As a result, a corner surface is formed at the chamfered portion.

Japanese Patent No. 3780249

  Each flap of the corner cut carton is provided with a crease line as a crease line so that it bends along the cut part of the top plate and the bottom plate. However, if the crease line is weak or the humidity is high, depending on the production lot of the carton The flap may not bend along the cut part and the corner surface may bulge outward. In this case, the corner surface greatly protrudes from the top surface and the bottom surface, so that the appearance is deteriorated.

  Therefore, an object of the present invention is to provide a caser capable of forming a corner surface of a corner cut carton into an appropriate shape even if the fold line of the flap is weak.

  The caser of the present invention is formed of a top plate (2b), a bottom plate (2a), and a side plate (2c) connecting them, and a trunk portion (2) having a pair of side surfaces facing each other, A flap (3) provided continuously to the side plate and bent so as to close an open side surface of the body portion, and the four corners of the top plate and the bottom plate are cut to form a chamfered portion (2d). ), And the flap is bent in two stages along the chamfered portion to form a corner cut carton (1) in which corner surfaces (5) are provided at the respective corners, while the corner cut carton is being formed. In a caser (10) that accommodates an article to be packed (C) and packages the article to be packed, a conveyor (11) that conveys the corner-cut carton with the side plate facing forward in the conveying direction; A protruding position that protrudes into the conveyance area where the carton is conveyed so as to contact the corner surface of the corner cut carton on the conveyor, and a retreat that retracts to the side of the conveyor so as to retreat outside the conveyance area A molding means (15) comprising: a molding member (16) movable between positions; and spring means (23) for biasing the molding member so that the molding member moves to the protruding position; By providing the above, the above-described problems are solved.

  According to the caser of the present invention, when the corner cut carton is conveyed by the conveyor, the molding member comes into contact with the corner surface of the carton, so that the flap can be pushed into the carton. Further, since the molded member moves to the retracted position according to the movement of the carton, the flap can be appropriately bent along the chamfered portion. Therefore, even if the carton having the corner surface bulging outward due to factors such as weak crease lines in the flap is conveyed, the corner surface can be formed into an appropriate shape by the forming member.

  In one embodiment of the caser of the present invention, the molding means may be provided on both sides of the conveyor so that the molding members face each other with the conveyor interposed therebetween. In this case, the corner surfaces on both sides of the carton can be simultaneously formed while preventing the carton from moving to one side of the conveyor.

  In one embodiment of the caser of the present invention, the molding member is attached to a shaft member (18) provided to extend in a direction perpendicular to the conveying surface of the conveyor, and is coaxially and rotatably attached to the shaft member. A cylindrical roller (19) in contact with the corner surface at the protruding position, and the spring means may urge the shaft member to move the forming member to the protruding position. In this case, since the roller forms the corner surface while rolling on the corner surface, it is possible to suppress the corner surface from being scratched by the molded member.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, according to the caser of the present invention, the flap can be pushed into the corner cut carton by the molded member. Further, the flap can be appropriately folded along the chamfered portion by the molded member. Therefore, the corner surface can be formed into an appropriate shape even in a corner cut carton where the fold line of the flap is weak.

The figure which shows a part of caser concerning one form of this invention roughly. The perspective view which shows an example of a corner cut carton. The perspective view which shows the corner cut carton in the middle of shaping | molding. The figure which expands and shows a guide. The figure which shows the side roller mechanism seen from the arrow V direction of FIG. The figure which shows the corner surface shaping | molding mechanism seen from the arrow VI direction of FIG. The perspective view which looked at the corner surface shaping | molding mechanism from the conveyance direction downstream. The figure which shows an example of the corner cut carton where the corner surface swelled.

  FIG. 1 schematically shows a part of a caser according to an embodiment of the present invention. The caser 10 supplies a predetermined number of canned beverages C as packaged items onto a carton 1 in the middle of molding while molding a corner cut carton (hereinafter sometimes abbreviated as a carton) 1 shown in FIG. This is a device that completes the molding of the carton 1 and thereby completes the canned beverage C package. As shown in this figure, the carton 1 is bonded so that a plurality of (for example, 24) canned beverages C are accommodated in a state in which they are arranged vertically and horizontally, and both ends of the trunk 2 are closed. An inner flap 3 and an outer flap 4 that are bonded to each other by an agent are provided. In this figure, the inner flap 3 is folded and the outer flap 4 is not yet folded.

  FIG. 3 shows a state in which one side plate 2c of the body portion 2 and the top plate 2b connected thereto are bent so as to stand upright with respect to the bottom plate 2a. As is apparent from these figures, the body 2 is disposed between the bottom plate 2a and the top plate 2b that cover the bottom side and the top side of the can beverage C, respectively, and the bottom plate 2a and the top plate 2b. And a pair of side plates 2c to be connected. The inner flap 3 is connected to both ends of the side plate 2c, and the outer flap 4 is connected to both ends of the bottom plate 2a and the top plate 2b. The four corners of the bottom plate 2a and the top plate 2b are cut obliquely to form a chamfered portion 2d. Each inner flap 3 is folded in two steps along the chamfered portion 2d with two ruled lines (crease lines) 3a and 3b as bending axes. Therefore, by bonding the inner flap 3 and the outer flap 4, the carton 1 is configured as a packing container having a shape in which corner surfaces 5 are formed at four corners of a rectangular parallelepiped. The ruled line 3a located at the boundary with the side plate 2c corresponds to the first fold line, and the ruled line 3b located closer to the tip of the inner flap 3 than the ruled line 3a corresponds to the second fold line. Hereinafter, the ruled line 3a may be referred to as an A ruled line 3a, and the ruled line 3b may be referred to as a B ruled line 3b.

  As shown in FIG. 1, the caser 10 includes a conveyor 11 that conveys the carton 1 linearly. The carton 1 folded up to the stage shown in FIG. 3 is carried into the conveyor 11. At this time, the carton 1 is loaded onto the conveyor 11 such that the right side plate 2c in FIG. 3 faces forward (downstream) in the transport direction. The conveyor 11 sequentially conveys the cartons 1 one by one from the left side to the right side in the drawing as indicated by the arrow A. In the caser 10, the can beverage C is supplied onto the carton 1 in a region upstream of the portion shown in FIG. Thereafter, each inner flap 3 is folded along the A ruled line 3 a by a flap folding device (not shown), and then the outer flap 4 is folded and bonded to the inner flap 3. At this time, since the can beverage C is taken on the carton 1, each inner flap 3 is folded not only along the A ruled line 3a but also along the B ruled line 3b by the pushing force through the outer flap 4. Thereby, the four corners of the carton 1 are formed. Further, the top plate 2b is folded and bonded to the adhesive margin 2e of the side plate 2c on the rear side in the transport direction. In addition, for example, a hot melt adhesive is used for bonding each part.

  The carton 1 molded to this state is sent to the portion shown in FIG. At this portion, the outer flap 4 is pressed from the side and the top plate 2b is pressed from above to hold the portions so that they do not peel off until the adhesive is hardened. That is, in this portion, the molding is completed, but the carton 1 before the adhesive is hardened is conveyed. As shown in the figure, a side roller mechanism 12 for pressing the outer flap 4 from the side and bringing it into intimate contact with the inner flap 3 is provided on the side of the conveyor 11. The side roller mechanism 12 is provided on both sides of the conveyor 11 so as to face each other with the conveyor 11 in between. Although not shown, a plurality of rollers are provided above the conveyor 11 to hold the top plate 2b downward.

  FIG. 4 is an enlarged view of the side roller mechanism 12 provided on the lower side of FIG. As shown in this figure, the side roller mechanism 12 includes a base 13 fixed to the conveyor 11 and a plurality of (six in FIG. 4) pressing rollers 14 rotatably supported by the base 13. . FIG. 5 is a view of the side roller mechanism 12 as seen from the direction of the arrow V in FIG. As shown in this figure, each pressing roller 14 has a columnar shape, and is supported by the base 13 so that the rotation axis Ax1 extends in a direction perpendicular to the transport surface 11a of the conveyor 11. The plurality of pressing rollers 14 are supported by the base 13 so as to be arranged at predetermined intervals along the transport path of the carton 1. The base 13 is fixed to the conveyor 11 so that each pressing roller 14 contacts the outer flap 4 when the carton 1 passes in front of the side roller mechanism 12.

  The side roller mechanism 12 is provided with a corner surface forming mechanism 15 as a forming means. As shown in this figure, the corner surface forming mechanism 15 is disposed on the upstream side of the plurality of pressing rollers 14. The corner surface forming mechanism 15 includes a forming roller 16 as a forming member, and a support portion 17 that supports the forming roller 16 so as to be movable in the width direction (vertical direction in the drawing) of the conveyor 11. 6 is a view of the corner surface forming mechanism 15 as seen from the direction of the arrow VI in FIG. As shown in this figure, the support portion 17 includes a base plate 17a, an upper end plate 17b that extends laterally from the upper end of the base plate 17a, and a lower end plate 17c that extends laterally from the lower end of the base plate 17. The base plate 17a is fixed to the base 13. The upper end plate 17b and the lower end plate 17c have the same shape and extend in the same direction.

  As shown in FIG. 4, the upper end plate 17b and the lower end plate 17c are provided with long holes 17d extending in a direction orthogonal to the conveying direction of the carton 1. The forming roller 16 includes a support shaft 18 as a shaft member, and a columnar roller 19 that is supported on the support shaft 18 so as to be coaxial and rotatable about the rotation axis Ax2. The diameter of the roller 19 is the same as the diameter of the pressing roller 14. The support shaft 18 is inserted into the long holes 17d of the upper end plate 17b and the lower end plate 17c. Thereby, the molding roller 16 is supported so as to be movable in the width direction of the conveyor 11. The size of the long hole 17d is such that the forming roller 16 protrudes into the conveyance area where the carton 1 is conveyed so as to come into contact with the corner surface 5 of the carton 1 on the conveyor 11, and retreats outside the conveyance area. Thus, it is set so as to be movable between the retracted position retracting to the side of the conveyor 11. As the retreat position, a position where the roller 19 is aligned with the plurality of pressing rollers 14 along the conveying direction of the carton 1 is set. Moreover, as a protrusion position, the position which moved the distance L to the conveyor 11 side with respect to the retreat position is set, for example. As the distance L, for example, about 10 mm is set. The distance L may be set as appropriate according to the size of the corner surface 5 of the carton 1.

  As shown in FIG. 6, fasteners 20 are provided at the upper and lower ends of the support shaft 18 so that the support shaft 18 does not come out of the support portion 17. These fasteners 20 include a rod 21 that extends in a direction orthogonal to the support shaft 18. These rods 21 extend in the same direction and are inserted into the through holes 22 a of the wall plate 22 fixed to the base 13. The inner diameter of the through hole 22 a is set slightly larger than the outer diameter of the rod 21. On the outer periphery of each rod 21, springs 23 are provided as spring means. The spring 23 is attached in a compressed state between the fastener 20 and the wall plate 22. For this reason, when the pressing force in the right direction in this figure is not applied to the forming roller 16, the forming roller 16 is moved to the protruding position by the spring 23. A male screw 21 a is cut at the tip of each rod 21. The male screw 21a is provided for screwing a nut (not shown) so that the position of the forming roller 16 is maintained at the retracted position.

  In addition, the upper side roller mechanism 12 in FIG. 1 is configured to be symmetrical with the lower side roller mechanism 12 and the conveyor 11 in between. Therefore, detailed description is omitted.

  In this caser 10, when the carton 1 is conveyed by the conveyor 11 as shown in FIG. 7, the forming roller 16 first comes into contact with the corner surface 5. At this time, when the corner surface 5 is expanded outward as shown in FIG. 8, the roller 19 pushes the inner flap 3 into the outer flap 4 while rotating clockwise (in the direction of arrow R in the figure). Further, as the carton 1 moves in the direction of arrow A, the forming roller 16 is pushed in the direction of arrow B by the inner flap 3, so that the roller 19 gradually moves to the retracted position while rotating along the corner surface 5. As the forming roller 16 moves in this manner, the inner flap 3 is appropriately bent at the ruled lines 3a and 3b, so that the corner surface 5 is formed into an appropriate shape. As shown in FIG. 1, the side roller mechanism 12 is disposed so as to face both sides of the conveyor 11. Therefore, when the carton 1 passes through this portion, the corner surfaces 5 on both sides are formed by the respective forming rollers 16. Further, by simultaneously forming the corner surfaces 5 on both sides in this manner, the carton 1 is prevented from moving to either one side. After the carton 1 passes, the forming roller 16 is returned to the protruding position by the spring 23. Thereafter, the corner surface 5 of the carton 1 is repeatedly formed in the same manner.

  As described above, according to the caser 10 of the present invention, even if the corner surface 5 bulges outward during molding due to factors such as weak entry of the ruled lines 3a and 3b of the inner flap 3, the molding roller 16 The inner flap 3 can be pushed inside the outer flap 4. Further, the inner flap 3 can be bent along the chamfered portion 2d by moving the roller 19 to the retracted position while rotating. Therefore, the corner surface 5 can be formed into an appropriate shape. Thereby, while improving the external appearance of the carton 1, the clearance gap between the top plate 2b and the bottom plate 2a, and the corner surface 5 can be made small. Since the roller 19 of the molding roller 16 is rotatably provided, it is possible to suppress the corner surface 5 from being damaged during molding. Since the side roller mechanism 12 is disposed so as to face both sides of the conveyor 11, the corner surfaces 5 on both sides of the carton 1 are simultaneously molded while preventing the carton 1 from moving to either side. be able to.

  The molding roller 16 can hold its position in the retracted position by screwing a nut into the male threaded portion 21 a of the rod 21. Therefore, when it is not necessary to form the corner surface 5 by the forming roller 16, it is possible to prevent unnecessary force from acting on the carton 1 by holding the forming roller 16 in the retracted position.

  The present invention may be implemented in various forms without being limited to the form described above. For example, in the embodiment described above, the corner surface is formed by a rotatable roller. However, the forming member used for forming the corner surface may not be rotatable or may not be cylindrical. For example, a columnar member having a semicircular cross section or a sector shape may be used as the molded member. Moreover, you may use a prism etc. as a shaping | molding member.

  The corner surface forming mechanism may not be provided on both sides of the conveyor so as to face each other. For example, a corner surface forming mechanism is provided only on one side of the conveyor, and a rail that holds the position on the other side so that the carton does not move to the other side when the forming roller is forming the corner surface, etc. A holding member may be provided. Further, when the weight of the packaged item accommodated in the carton is sufficiently heavy and the carton does not move as long as it is pushed by the forming roller, a holding member such as a rail may not be provided.

1 corner cut carton 2 body 2a bottom plate 2b top plate 2c side plate 2d chamfered portion 3 inner flap 5 corner surface 10 caser 11 conveyor 15 corner surface forming mechanism (forming means)
16 Forming roller (Forming member)
18 Support shaft (shaft member)
19 Roller 23 Spring (spring means)
C Canned beverage (packaged item)

Claims (3)

Formed by a top plate, a bottom plate, and a side plate that connects them, a pair of side surfaces facing each other is opened, and a side portion that is provided in a row with the side plate and is closed is closed. Each of the top plate and the bottom plate is cut to provide a chamfered portion, and the flap is bent in two steps along the chamfered portion at each corner portion. In a caser that wraps the packaged article by accommodating the packaged article in the corner cut carton in the middle of formation while forming the corner cut carton provided with the corner surface,
A conveyor that conveys the corner cut carton so that the side plate faces forward in the conveying direction;
A protruding position that protrudes into the conveyance area where the carton is conveyed so as to contact the corner surface of the corner cut carton on the conveyor, and a retreat that retracts to the side of the conveyor so as to retreat outside the conveyance area Forming means having a forming member movable between positions, and a spring means for biasing the forming member so that the forming member moves to the projecting position. Caser.   The caser according to claim 1, wherein the forming unit is provided on both sides of the conveyor so that the forming members face each other with the conveyor interposed therebetween. The molding member has a shaft member provided so as to extend in a direction perpendicular to the conveying surface of the conveyor, and a columnar shape that is coaxially and rotatably attached to the shaft member and is in contact with the corner surface at the protruding position. A roller, and
The caser according to claim 1, wherein the spring means moves the molding member to the protruding position by urging the shaft member.

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