JP7143072B2 - Bottom support for packaging box used in box making machine, box making machine provided with bottom support, and method for making packaging box using bottom support - Google Patents

Description

The present invention provides a bottom support for a packaging box used in a box-making machine that automatically assembles packaging boxes folded into a flat plate into a box shape, a box-making machine provided with the bottom support, and the bottom support. It relates to a box-making method for assembling a packaging box using

Corrugated cardboard boxes are widely used as packaging boxes for containing, storing, and transporting a plurality of contents. Among them, the 0201 format is the most widely used and represents the cardboard box (for example, see Patent Document 1). As shown in FIG. 18, this 0201 type corrugated box has four faces 101 to 104, eight flaps 105 to 112 and one seam separated by two horizontal ruled lines 114 and four vertical ruled lines 115. It is formed by a blank sheet with margins 113 . The four surfaces 101 to 104 are composed of a pair of left and right side surface portions 101 and 102 of the same size and shape and a pair of front and rear end surface portions 103 and 104 of the same size and shape, and the eight flaps 105 to 112 are , a pair of left and right lid side outer flaps 105 and 106 and a pair of left and right bottom side outer flaps 107 and 108 of the same size and shape, and a pair of front and rear lid side inner flaps 109 and 110 of the same size and shape and a pair of front and rear flaps. It is composed of bottom side inner flaps 111 and 112 .

To assemble a 0201 type corrugated cardboard box, first, the joint margin 113 is joined to, for example, the inner peripheral surface of the end face portion 104 so that the side face portion 101, the end face portion 103, the side face portion 102, and the end face portion 104 form a peripheral wall in this order. Form into a rectangular tube. Then, after folding the two lid-side inner flaps 109, 110 and the two bottom-side inner flaps 111, 112 inwardly by 90 degrees, the two lid-side outer flaps 105, 106 and the two bottom-side outer flaps 107, 108 are folded. The corrugated cardboard box 100 is folded 90 degrees inward, and the tip edges of the two lid-side outer flaps 105 and 106 and the tip edges of the two bottom-side outer flaps 107 and 108 are brought into contact with each other at approximately the center position in the width direction of the corrugated cardboard box 100 . As a result, the bottom is assembled and sealed, and the corrugated cardboard box 100 shown in FIG. 19 is assembled.

A corrugated cardboard box is usually stored in a state of being folded into a flat plate before being packed with contents, and is assembled by opening the corrugated cardboard box at the time of use for packing the contents. Conventionally, a box making machine (caser) has been known as a device for automatically assembling cardboard boxes at the time of use.

Box making machines are mainly classified into horizontal assembly type and vertical assembly type. In the vertical assembly type box making machine, as shown in FIG. Then, the flat cardboard boxes 100 are taken out one by one from the top and opened into the above-described rectangular tube shape. After folding the two bottom side inner flaps 111 and 112, the two bottom side outer flaps 107 and 108 are gradually folded to assemble the corrugated cardboard box 100.例文帳に追加

In the process of folding the two bottom outer flaps 107, 108 of the corrugated cardboard box 100 in the box making machine, for example, a pair of left and right outer flap folding tools 120, 121 as shown in FIG. 21 are used. The two outer flap folding tools 120 and 121 are formed of rod-shaped members extending in the front-rear direction, and the rear side is inclined lower than the front side in side view, and the rear side is wider left and right than the front side in plan view. It is arranged so as to open in the shape of a letter. The cardboard box 100 in the shape of a rectangular tube is conveyed from the rear side to the front side on both the outer flap folding devices 120 and 121, and the two hanging bottom side outer flaps 107 and 108 are conveyed. It hits the flap folding device 120, 121 and slides over it. As a result, the two bottom outer flaps 107, 108 are progressively folded by respective outer flap folding tools 120, 121 and finally folded inward at 90 degrees.

A bottom support 122 is provided between the two outer flap folding devices 120,121. The bottom support 122 supports the cardboard box 100 from below as the cardboard box 100 is conveyed over the outer flap folding devices 120 and 121 . The bottom support 122 has a support plate 123 that extends in the transport direction of the cardboard box 100 and supports the bottom of the cardboard box 100 that is transported. The support plate 123 is positioned in the center of the width direction of the cardboard box 100 being conveyed, and even if the two bottom side flaps 107 and 108 of the cardboard box 100 are folded, the two bottom side flaps 107 and 108 are It is folded without interfering with the support plate 123. - 特許庁

JP 2013-141992 A

In the box making machine with the above configuration, the two bottom side outer flaps are rectangular and bilaterally symmetrical, and the two bottom side outer flaps can be used without any problem for corrugated cardboard boxes in which the tip edges are butted against each other at approximately the center position in the width direction. The flap can be folded in and assembled on the bottom. However, for corrugated cardboard boxes in which the two bottom outer flaps are not rectangular but left-right asymmetrical and the leading edges are not butted at approximately the center position in the width direction, the two bottom outer flaps are each folded by an outer flap folding tool. During folding, the bottom support interferes with the leading edges of the two bottom outer flaps. Therefore, there is a problem that the two bottom side outer flaps cannot be properly folded, and the bottom assembly cannot be performed.

The present invention has been made in view of the above-described problems, and a bottom support that enables the bottom assembly of a packaging box such as a corrugated cardboard box having left-right asymmetric bottom-side outer flaps to be satisfactorily assembled by a box-making machine. intended to provide Another object of the present invention is to provide a box making machine provided with the bottom support, and a method for making packaging boxes using the bottom support.

The bottom support of the present invention, which can solve the above problems, supports the conveyed packaging box when the bottom is assembled by folding the pair of left and right bottom side outer flaps while conveying the packaging box in a box making machine. The device is characterized by comprising a support plate extending along the transport direction of the packaging box, the support plate having a notch cut from a front edge to a lower edge.

A preferred embodiment of the bottom support of the present invention further comprises a receiver located forward of the support plate.

A preferred embodiment of the bottom support of the present invention further comprises a base for supporting the support plate, and the receiver is attachable to and detachable from the base.

The box making machine of the present invention, which can solve the above problems, is a device for assembling packaging boxes, comprising a conveying means for conveying the packaging boxes and a pair of left and right bottom side outer flaps of the conveyed packaging boxes. It is characterized by comprising at least a pair of left and right outer flap folding tools for folding and the bottom support having the above configuration.

The box-making method of the present invention that can solve the above problems is a method for assembling a packaging box having a pair of left and right bottom side outer flaps that are asymmetrical and have a wider width at the other end than at one end. and an outer flap folding step of carrying the packaging box while supporting it with a bottom support and assembling the bottom by folding two bottom side outer flaps, wherein the bottom support is notched from the front end edge to the lower end edge. In the outer flap folding step, the wide end of one bottom side outer flap enters the notch of the support plate so that it can be folded, and the packaging box is conveyed. It is characterized in that the wide end portion of the other bottom side outer flap is inserted into the notch portion of the support plate as it is folded, so that it can be folded.

In a preferred embodiment of the box-making method of the present invention, the packaging box that has passed through the support plate is supported by a receiver located in front of the support plate of the bottom support.

According to the present invention, the two bottom-side outer flaps of the packaging box are not bilaterally symmetrical rectangular shapes, but bilaterally asymmetrical odd shapes in which one end in the length direction is wider than the other end. However, the two bottom side outer flaps can be folded in without interfering with the support plate. Specifically, the support plate has a notch so that as the packaging box is transported, the wide ends of each of the two bottom outer flaps successively enter the notch. As a result, the two bottom outer flaps are folded without interfering with the support plate, and the tip edges are butted against each other. Therefore, the bottom of the packaging box can be assembled satisfactorily.

Fig. 3 is a perspective view of the bottom support; Fig. 3 is a side view of the bottom support; Fig. 3 is an exploded perspective view of the bottom support; It is an expanded view of a cardboard box. 1 is a perspective view of a cardboard box; FIG. It is a bottom view of a cardboard box. It is a top view of the open state of the cardboard box. FIG. 11 is a bottom view of another example of a cardboard box; It is a top view which shows schematic structure of a box making machine. FIG. 4 is a plan view showing a schematic configuration of a box making machine in a take-out process; FIG. 5 is a schematic cross-sectional view for explaining the operation of the inner flap folding means in the inner flap folding step; FIG. 3 is a plan view showing a schematic configuration of a box making machine in a conveying process; FIG. 10 is a perspective view for explaining the folding operation of the bottom side outer flap in the outer flap folding step; FIG. 14 is a perspective view for explaining the folding operation of the bottom side outer flap in the outer flap folding step following FIG. 13 ; FIG. 15 is a perspective view for explaining the folding operation of the bottom side outer flap in the outer flap folding step following FIG. 14 ; FIG. 16 is a perspective view for explaining the folding operation of the bottom side outer flap in the outer flap folding step following FIG. 15; FIG. 5 is a schematic cross-sectional view for explaining the operation of the crimping means in the crimping step; 1 is an exploded view of a 0201 type corrugated cardboard box; FIG. 1 is a perspective view of a 0201 type cardboard box; FIG. This is a vertical assembly type cardboard box assembly method. Tool used to tuck the two bottom outer flaps of a 0201 style corrugated box.

Hereinafter, a bottom support for a packaging box, a box making machine and a method for making a packaging box according to the present embodiment will be described with reference to the accompanying drawings. In the following description, a cardboard box is used as an example of a packaging box, but the packaging box is not necessarily limited to a cardboard box.

1 to 3 show the bottom support 1 of this embodiment. The bottom support 1, which will be described later in detail, is used in a box making machine that automatically assembles packaging boxes such as corrugated cardboard boxes. Specifically, as shown in FIGS. 13 to 16, in the process of assembling the bottom of the corrugated cardboard box 5 in the box making machine (outer flap folding process described later), while conveying the corrugated board 5, a pair of left and right bottom sides It supports the corrugated cardboard box 5 from below when the outer flaps 58 and 59 are gradually folded by the pair of left and right outer flap folding tools 12A and 12B.

The bottom support 1 includes a support plate 2 , a base 3 supporting the support plate 2 , and a receiver 4 located forward of the support plate 2 . The cardboard box 5 is conveyed on the bottom support 1 in the X direction in FIG. Therefore, in the bottom support 1, the X direction in FIG. The T direction is defined as "down". The same applies to FIGS. 9, 10 and 12 as well.

The support plate 2 is a plate-like body that extends along the transport direction (front-rear direction) of the cardboard box 5 and has a predetermined thickness. are integrated. When the corrugated cardboard box 5 passes over the support plate 2, the pair of left and right bottom side outer flaps 58 and 59 are gradually folded to be bottom-assembled. The support plate 2 slidably supports the bottom of the cardboard box 5 passing thereon, and guides the cardboard box 5 to be conveyed straight.

The support plate 2 has a notch 20 that is cut from the front edge to the bottom edge. The cutout portion 20 is formed of, for example, a semi-U-shaped groove when viewed from the side. It is formed by notching up to the bottom edge as drawn. Note that the shape of the notch 20 when viewed from the side does not necessarily have to be a half-U shape. Various shapes such as a rectangular shape that is notched from the front edge to the lower edge in an L shape can be used.

The base 3 is a plate-like body that extends along the transport direction (front-rear direction) of the cardboard box 5 and has a thickness greater than that of the support plate 2. It is fixed inside the box making machine. One or more through holes 30 are formed in the base 3 . This through hole 30 is for fixing the base 3 to the mounting portion in the box making machine using fixing means such as bolts and nuts. The through hole 30 is formed as an elongated hole elongated in the vertical direction in this embodiment.

The base 3 is integrally provided with a mounting portion 31 for mounting the receiving tool 4 on the front end side. The mounting portion 31 has a pair of left and right connecting plates 32 projecting left and right from the plate surface of the base 3 , and a pair of left and right cylindrical bodies 33 provided at the leading edge of each connecting plate 32 .

The receiver 4 supports the cardboard box 5 being conveyed from below in front of the support plate 2 . The corrugated cardboard box 5 that has passed through the support plate 2 and has been bottom-assembled is transferred to a transport path 16 (shown in FIG. 9 and the like) to the next process in the box making machine. It is arranged at a predetermined distance from the front end of the support plate 2 so as to assist the transfer of the box 5. - 特許庁

The receiver 4 has a rod-shaped body 40 that is curved upwardly. The tip of the rod-shaped body 40 is positioned at a height H substantially equal to the upper edge of the support plate 2 . The rod-shaped body 40 is positioned in front of the support plate 2 and slidably supports the bottom surface of the cardboard box 5 after passing through the support plate 2 so that the posture of the cardboard box 5 being transported is kept upright without tilting forward. Hold. As a result, the cardboard box 5 can be satisfactorily transferred to the conveying path 16 located in front of the bar 40 .

In this embodiment, the receiving tool 4 is detachable from the base 3 and has a connecting portion 41 for attaching the rod-shaped body 40 to the base 3 . The connecting portion 41 includes a horizontal rod-shaped base portion 42 in which the rod-shaped body 40 protrudes upward from the outer peripheral surface, and a pair of left and right rod-shaped leg portions 43 that protrude downward from the outer peripheral surface of the base portion 42 . By inserting each leg part 43 of the connection part 41 into each cylindrical body 33 of the attachment part 31 of the base 3, the receiving tool 4 can attach the rod-like body 40 to the base 3 as needed. The rod-shaped body 40 can be removed from the base 3 by pulling out the legs 43 of the connecting part 41 from the tubular bodies 33 of the mounting part 31 of the base 3 .

Next, a corrugated cardboard box 5 that can be preferably assembled by a box making machine using the bottom support 1 described above will be described. 4 is a development view (blank sheet) of the cardboard box 5, FIGS. 5 and 6 are a perspective view and a bottom view of the cardboard box 5, and FIG. 7 is a plan view of the cardboard box 5 with the lid open. be.

As shown in FIG. 4, the corrugated cardboard box 5 shown in this embodiment has two side surface portions 50 and 51 of the same size and shape, two end surface portions 52 and 53 of the same size and shape, and two lid side outer flaps 54, 55 of the same size and shape, two lid side inner flaps 56, 57 of the same size and shape, two bottom side outer flaps 58, 59 of the same size and shape, and two It has bottom inner flaps 60 and 61 of the same size and shape and one seam allowance 62 . The two side surface portions 50, 51 and the two end surface portions 52, 53 are alternately and continuously provided. Bottom side outer flaps 58 and 59 are provided on the side edges, respectively, lid side inner flaps 56 and 57 are provided on one side edge of the two end faces 52 and 53, and bottom side inner flap 60 is provided on the other side edge. , 61 are provided respectively. The leading edges of the two lid-side outer flaps 54 and 55 and the leading edges of the two lid-side inner flaps 56 and 57 are positioned on the same straight line, and the leading edges of the two bottom-side outer flaps 58 and 59 The tip edges of the two bottom inner flaps 60, 61 are located on the same straight line.

The cardboard box 5 shown in this embodiment differs from the conventional 0201 type cardboard box 100 (shown in FIGS. 18 and 19) in the shape of the bottom side outer flaps 58 and 59 and the bottom side inner flaps 60 and 61, It is the same as the 0201 type corrugated cardboard box 100 except that the size is different. In other words, the corrugated cardboard box 5 shown in this embodiment has the joint margin 62 joined to, for example, the inner peripheral surface of the end face portion 53 so that the side face portion 50, the end face portion 52, the side face portion 51, and the end face portion 53 form a peripheral wall in this order. After forming into a rectangular tubular shape, the lid-side inner flaps 56, 57 and the bottom-side inner flaps 60, 61 are bent inwardly by 90 degrees, and the lid-side outer flaps 54, 55 and the bottom-side outer flaps 58, 59 are folded. are folded inward 90 degrees and the leading edges of the two lid-side outer flaps 54 and 55 and the leading edges of the two bottom-side outer flaps 58 and 59 are butted against each other, thereby sealing the lid side and the bottom side of the box. , a cardboard box 5 is assembled.

Here, in the corrugated cardboard box 5 shown in this embodiment, first, as shown in FIG. , 51 (the length of the box) l, which is about half (slightly smaller than half). As a result, as shown in FIG. 7, when the corrugated cardboard box 5 is assembled at the bottom, the tip edges of the bottom inner flaps 60 and 61 are opposed to each other at substantially the center position in the longitudinal direction of the corrugated cardboard box 5 and butted against each other. . Note that the tip edges of the bottom-side inner flaps 60 and 61 do not necessarily have to contact each other, and there may be some gap therebetween.

As shown in FIG. 18, in the conventional 0201 type corrugated cardboard box 100, the widths of the flaps 105 to 112 are all the same size, and even if the width d of the two bottom inner flaps 111 and 112 is added, It is significantly shorter than the length of the side portions 101 and 102 (the length of the box) l. Therefore, when the corrugated cardboard box 100 is assembled at the bottom, there is a gap between the leading edges of the bottom inner flaps 111 and 112, and this gap creates a step on the inner surface of the bottom of the box. If there is a step on the inner surface of the bottom portion of the box, the bottle, bottle, or the like stored in the corrugated cardboard box 100 may rattle and tilt due to the step. Therefore, in the conventional 0201 type corrugated cardboard box 100, a filler board is attached to the bottom of the box in order to eliminate this step. Manual labor is required to assemble 100, which reduces productivity.

On the other hand, in the corrugated cardboard box 5 shown in this embodiment, the tip edges of the two bottom inner flaps 60 and 61 are butted against each other at approximately the center position in the longitudinal direction of the corrugated cardboard box 5, so that there is a gap between them. There is almost no level difference on the inner surface of the bottom part of the box. Therefore, unlike the conventional 0201 type corrugated cardboard box 100, there is no need to attach a filler board to the bottom of the box, and the number of workers can be reduced accordingly, thereby improving productivity.

In addition, in the cardboard box 5 shown in this embodiment, as shown in FIGS. 4 to 6, the two bottom-side outer flaps 58 and 59 have an irregular shape different from a rectangular shape, and are bilaterally symmetrical when the bottom is assembled. The configuration is also different from the 0201 type cardboard box 100 in that it is not. Specifically, when the two bottom side outer flaps 58 and 59 are assembled, the tip edges face each other and butt against each other. The bottom-side outer flap 58 has a wide end portion 58A on the one end face portion 53 side and a narrow end portion 58B on the other end face portion 52 side. The width of the end portion 59A on the side is wide, and the width of the end portion 59B on the one end surface portion 53 side is narrow. 4, the width of the wide ends 58A, 59A of the two bottom outer flaps 58, 59 is the same as the width d1 of each of the bottom inner flaps 60, 61; The tip edges of the bottom-side outer flaps 58 and 59 extend beyond the central position in the width direction of the cardboard box 5 when the cardboard box 5 is assembled at the bottom, as shown in FIG. On the other hand, the narrow ends 58B, 59B of the two bottom-side outer flaps 58, 59 do not reach the center position in the width direction of the cardboard box 5, and the wide ends 58A, 59A The intermediate portion between the is obliquely slanted at the leading edge so that the width gradually decreases along the length.

The two bottom outer flaps 58, 59 of the corrugated cardboard box 5 shown in this embodiment have a predetermined length at the leading edges of both the wide ends 58A, 59A and the narrow ends 58B, 59B. 8, the tip edges of the bottom side outer flaps 58 and 59 are stepped as a whole, but as shown in FIG. may be

Next, a box-making method and a box-making machine for assembling the cardboard box 5 described above will be described. The box making method is similar to the vertical assembly type assembly method described with reference to FIG. An inner flap folding step of folding the two bottom inner flaps 60 and 61 of the corrugated cardboard box 5 opened into a square tubular shape, and gradually folding the two bottom outer flaps 58 and 59 while conveying the corrugated cardboard box 5. and an outer flap folding step of folding and assembling the bottom. Further, the box-making method includes a coating step of applying an adhesive to the two folded bottom-side inner flaps 60 and 61 of the cardboard box 5 to be conveyed between the inner flap folding step and the outer flap folding step; After the outer flap folding step, a crimping step of crimping the two folded bottom inner flaps 60, 61 of the corrugated cardboard box 5 to the two bottom outer flaps 58, 59 from above to bond them together is further provided.

The box making machine 10, as shown in FIG. 9, is provided with processing means for carrying out each of the steps described above. In this embodiment, a magazine stock section 6 for vertically stacking a plurality of flat cardboard boxes 5, a take-out means 7 for taking out the flat cardboard boxes 5 one by one from the magazine stock section 6, and a A pair of front and rear inner flap folding means 8A, 8B for folding the two bottom inner flaps 60, 61 of the corrugated cardboard box 5, and a conveying means 9 for conveying the corrugated cardboard box 5 with the two bottom inner flaps 60, 61 folded. , one or more application nozzles 11 for applying adhesive to the two folded bottom inner flaps 60, 61 of the conveyed corrugated cardboard box 5, and the two bottom outer flaps 58 of the conveyed corrugated cardboard box 5, A pair of left and right outer flap folding tools 12A and 12B for gradually folding the corrugated cardboard box 59, a bottom supporting member 1 for supporting the conveyed corrugated cardboard box 5 from below, and two bottom inner flaps 60 and 61 in which the corrugated cardboard box 5 is folded. A pair of front and rear crimping means 13A, 13B are provided to crimp the two bottom side outer flaps 58, 59 from above.

The magazine stock section 6 is formed by folding a plurality of cardboard boxes 5 into a flat plate shape by folding the joining margins 62 to, for example, the inner peripheral surface of the end surface portion 53, and erecting them vertically so that the plate surfaces are in contact with each other. Stock up in a row.

As shown in FIG. 10, the plate-like cardboard boxes 5 stocked in the magazine stock section 6 are taken out one by one by the take-out means 7 and opened into a square tube shape (take-out step).

The takeout means 7 has a holding member 71 having one or more suction pads 70 and a slider 72 supporting the holding member 71 . The suction pad 70 is connected to suction means such as a vacuum pump (not shown). The slider 72 reciprocates in the left-right direction (the VW direction in FIG. 10) while being guided by two horizontal guides 73 horizontally mounted in the box making machine 10 . Although not shown, the slider 72 can be reciprocated by a known reciprocating drive mechanism such as a motor, cylinder, or linear actuator. The take-out means 7 moves the slider 72 along the horizontal guide 73 while sucking and holding the top one of the plurality of flat cardboard boxes 5 stocked in the magazine stock section 6 with the suction pad 70 of the holding member 71 . It is taken out from the magazine stock section 6 by sliding. At this time, the flat cardboard box 5 is automatically opened to form a rectangular tube-like cardboard box 5 whose top and bottom are open. This square tubular corrugated cardboard box 5 has lid-side outer flaps 54, 55 and lid-side inner flaps 56, 57 standing up, and bottom-side outer flaps 58, 59 and bottom-side inner flaps 60, 61 hanging down. is doing. At this time, a stopper 14 provided on one of the side guides 15 rotates inwardly by 90 degrees to abut on the front end face of the cardboard box 5 to hold the cardboard box 5 at a predetermined position.

Next, as shown in FIG. 11, the two bottom inner flaps 60, 61 of the corrugated cardboard box 5 opened into a rectangular tubular shape are folded by a pair of front and rear inner flap folding means 8A, 8B (inner flap folding step).

The inner flap folding means 8A, 8B have a rotary shaft 80 rotatably supported in the box making machine 10 and a folding member 81 that rotates integrally with the rotary shaft 80 . The folding member 81 is made of a plate material having an L-shaped cross section, and normally the long side 81A hangs down, but when it rotates together with the rotating shaft 80 and the long side 81A faces horizontally, the two bottom sides can be folded. The inner flaps 60, 61 are folded inwardly by 90 degrees. Although not shown, the rotating shaft 80 is rotatable by a known rotary drive mechanism. When the two bottom-side inner flaps 60 and 61 are folded by the inner flap folding means 8A and 8B, the cardboard box 5 is released from the sucking and holding of the cardboard box 5 by the suction pad 70, and the stopper 14 rotates outward by 90 degrees. To enable transportation of a cardboard box 5. - 特許庁

Next, as shown in FIG. 12, the cardboard box 5 in which the two bottom inner flaps 60 and 61 have been folded is directed forward, that is, toward the pair of left and right outer flap folding tools 12A and 12B by the conveying means 9. transport it.

The conveying means 9 has an extrusion member 90 that can reciprocate in the box making machine 10 in the front-rear direction (the XY directions in FIG. 12). An arm 91 is rotatably supported by the push-out member 90 , and contacts the rear end surface of the cardboard box 5 by rotating the arm 91 inward by 90 degrees. Although not shown, the pushing member 90 can reciprocate along a predetermined transport path 92 by a known reciprocating drive mechanism such as a motor, cylinder, linear actuator, or the like. The conveying means 9 presses the corrugated cardboard box 5 with an arm 91, and pushes the corrugated cardboard box 5 forward along the conveying path 92, thereby pushing the corrugated cardboard box 5 into the two outer flap folding tools 12A and 12B positioned forward. transport towards. A pair of left and right side guides 15 are provided in the box making machine 10 . Both side guides 15 guide the cardboard box 5 to be conveyed straight by sandwiching the cardboard box 5 therebetween.

Next, while the corrugated cardboard box 5 in which the two bottom inner flaps 60 and 61 are folded is being conveyed, the application nozzle 11 is used to adhere, for example, a hot-melt adhesive to each of the bottom inner flaps 60 and 61 of the corrugated cardboard box 5. Apply the agent (application step). The application nozzle 11 is connected to adhesive supply means (not shown), and applies adhesive to the outer surfaces of the bottom inner flaps 60 and 61 when the corrugated cardboard box 5 passes above.

Further, while the cardboard box 5 is being transported, as shown in FIGS. 13 to 16, the pair of left and right outer flap folding tools 12A and 12B are used to gradually fold the two bottom outer flaps 58 and 59 to assemble the bottom (outer flaps). flap folding process).

The outer flap folding tools 12A and 12B are formed of rod-shaped members extending in the front-rear direction, and are horizontally widened so that the rear side is inclined lower than the front side in side view and the rear side is wider than the front side in plan view. It is arranged so as to open in the shape of a letter.

Between the two outer flap folding devices 12A, 12B, the bottom support 1 having the configuration described above is provided, and when the corrugated cardboard box 5 is conveyed over the two outer flap folding devices 12A, 12B, the corrugated cardboard is supported. By supporting the box 5 from below, the cardboard box 5 is guided to be conveyed straight.

While the cardboard box 5 is conveyed from the rear side to the front side on the two outer flap folding devices 12A and 12B as indicated by the arrows in FIG. It hits the corresponding outer flap folding device 12A, 12B and then slides over each outer flap folding device 12A, 12B. As a result, the two bottom outer flaps 58, 59 are folded by the respective outer flap folding tools 12A, 12B and finally folded 90 degrees inward.

Here, in this embodiment, the two bottom outer flaps 58 and 59 of the corrugated cardboard box 5 are not rectangular but left-right asymmetrical. It is wider than the portion 58B and the other bottom outer flap 59 has a forward end 59A wider than a rearward end 59B. As a result, the wide rear end 58A of one of the bottom-side outer flaps 58 hits the outer flap folding tool 12A and is folded in. However, since the wide rear end 58A is wide, the initial folding is as shown in FIG. 2, it abuts against the support plate 2 of the bottom support 1 and is prevented from bending. On the other hand, the wide front end 59A of the other bottom side outer flap 59 hits the outer flap folding device 12B and is folded. Since there is a notch 20 cut out from the bottom edge to the bottom edge, it enters the notch 20 of the support plate 2 when the bottom side outer flap 59 is bent, while the rear narrow end 59B is Since the width is small and does not reach the support plate 2 , the bottom outer flap 59 is folded without interfering with the support plate 2 .

As the corrugated cardboard box 5 moves forward as it is conveyed, as shown in FIG. The wide end portion 58A of the support plate 2 is inserted into the notch portion 20 of the support plate 2, so that the support plate 2 is folded without interfering with the support plate 2.例文帳に追加As a result, as shown in FIG. 16, the corrugated cardboard box 5 is bottom-assembled with the two bottom-side outer flaps 58 and 59 folded inward at an angle of 90 degrees. The bottom-assembled cardboard box 5 is transferred from the outer flap folding tools 12A and 12B and the receiver 4 of the bottom support 1 to the conveying path 16 (shown in FIG. 9, etc.) to the next crimping process.

Next, as shown in FIG. 17, the two bottom inner flaps 60 and 61 are attached to the two bottom outer flaps 58 by a pair of front and rear crimping means 13A and 13B for the corrugated cardboard box 5 assembled to the bottom. , 59 (crimping step).

The crimping means 13A, 13B have pushers 130 that contact the inner surfaces of the corresponding bottom-side inner flaps 60, 61, and cylinders 131 that reciprocate the pushers 130 in the vertical direction. As the cylinder 131 is driven, the pusher 130 moves downward and presses the bottom inner flaps 60 and 61 downward, respectively, so that the two bottom inner flaps 60 and 61 move toward the two bottom outer flaps 58 and 59. crimped to.

After that, the cardboard box 5 with the bottom assembled is placed on a transfer means 17 such as a roller conveyor, and the contents are inserted into the cardboard box 5. Two lid side inner flaps 56, 57 and two lid side The outer flaps 54 and 55 are successively folded and sent to a sealing step.

As described above, when the corrugated cardboard box 5 is assembled using the bottom support 1 configured as described above, the two bottom outer flaps 58 and 59 are formed in a symmetrical rectangular shape because the support plate 2 has the notch 20. Instead, even if one end 58A, 59A has a left-right asymmetric shape with a width larger than the other end 58B, 59B, the two bottom side outer flaps 58, 59 interfere with the support plate 2. can be folded by the outer flap folding tools 12A and 12B, respectively, and the tip edges can be butted against each other. Therefore, the corrugated cardboard box 5 can be satisfactorily assembled.

In addition, since the receiver 4 is arranged in front of the support plate 2 and supports the cardboard box 5 that has passed through the support plate 2 from below, the posture of the cardboard box 5 after passing the support plate 2 can be adjusted. It can be held upright without leaning forward. As a result, the corrugated cardboard box 5 can be satisfactorily transferred to the conveying path 16 for the next process after the bottom assembly.

It should be noted that the bottom supporting member 1 can be transferred to the transport path 16 for the next process without any problems even without the receptacle 4 due to the difference in size of the corrugated cardboard box 5 to be assembled. , the receiver 4 may be removed from the base 3 for use.

An embodiment of a bottom support, a corrugated cardboard box-making machine and a method of making a carton box has been described above, but the present invention is not limited to the above-described embodiments, and is not limited to the scope of the present invention. Various changes are possible in

For example, in the above-described embodiment, the receiver 4 of the bottom support 1 is detachable from the base 3 , but only the rod-shaped body 40 may be provided integrally with the base 3 .

In the above embodiment, the bottom support 1 is used to assemble the corrugated cardboard box 5 in which the two bottom outer flaps 58 and 59 are symmetrical and not rectangular. can also be assembled using the bottom support 1.

Further, the box making machine 10 is not limited to that of the above-described embodiment. Various forms are included in the present invention as long as they support the corrugated cardboard box 5 which is held in place.

REFERENCE SIGNS LIST 1 bottom support 2 support plate 3 base 4 receptacle 5 corrugated cardboard box 9 conveying means 10 box making machine 12A, 12B outer flap folding device 20 notch 58, 59 bottom outer flap 58A, 59A wide end

Claims (6)

A bottom supporting tool used for bottom assembly by folding a pair of left and right bottom side outer flaps of the packaging box with a pair of left and right outer flap folding tools while conveying the packaging box in a box making machine,
Equipped with a support plate that extends along the transport direction of the packaging box and supports the transported packaging box from below,
The support plate includes a notch portion formed by notching the front edge of the support plate from a position spaced a predetermined distance from the upper edge of the support plate to the lower edge of the support plate; and a plate-like portion located at the rear ,
The support plate is configured such that when a packaging box having a pair of left and right bottom side outer flaps, which is asymmetrical in left and right and has a larger width at the other end than at the other end, is conveyed on the support plate, the notch is provided with the The wide end of one of the bottom side outer flaps of the pair of left and right bottom side flaps folded by the pair of left and right outer flap folding tools can be inserted into the plate-shaped plate behind the notch. The wide end of the other bottom side outer flap of the pair of left and right bottom side outer flaps folded by the pair of left and right outer flap folding tools can abut against the wide end of the other bottom side outer flap. support. 2. The bottom support of claim 1, further comprising a receiver located forward of said support plate. Further comprising a base supporting the support plate,
3. The bottom support of Claim 2, wherein the receiver is removable from the base. A box making machine for assembling packaging boxes,
a conveying means for conveying the packaging box;
a pair of left and right outer flap folding tools for folding the pair of left and right bottom side outer flaps of the transported packaging box;
A box making machine comprising at least a bottom support according to any one of claims 1 to 3. A box-making method for assembling a packaging box comprising a pair of left and right bottom-side outer flaps that are asymmetrical and have a wider width at the other end than at one end, comprising:
An outer flap folding step of transporting the packaging box while supporting it with a bottom support, and folding the pair of left and right bottom side outer flaps by a pair of left and right outer flap folding tools to assemble the bottom,
The bottom support includes a support plate that extends along the transport direction of the packaging box and supports the transported packaging box from below,
In the outer flap folding step, the wide end of one of the pair of left and right bottom side outer flaps folded by the pair of left and right outer flap folding tools is positioned at the front edge of the support plate . The pair of left and right outer flap folding tools can be folded by entering the notch formed by notching from the upper edge to the lower edge of the support plate. The wide end portion of the other bottom side outer flap of the pair of left and right bottom side outer flaps folded in by abuts against the plate-like portion located behind the notch portion of the support plate, and the packaging box is conveyed. As the wide end portion of the other bottom side outer flap enters the notch portion of the support plate, it becomes possible to fold it. 6. The box-making method according to claim 5, wherein the packaging box that has passed through the support plate is supported by a receiver positioned in front of the support plate of the bottom support.

Images