WO2018042667A1

WO2018042667A1 - Packaging machine

Info

Publication number: WO2018042667A1
Application number: PCT/JP2016/076028
Authority: WO
Inventors: 武雄林; 真樹藤川; 仁丹保; 大輔隅
Original assignee: 日本たばこ産業株式会社
Priority date: 2016-09-05
Filing date: 2016-09-05
Publication date: 2018-03-08
Also published as: EP3492397B1; EP3492397A4; JPWO2018042667A1; JP6868628B2; EP3492397A1

Abstract

A packaging machine (1) includes a conveyance path (26) for forming a box (30) by folding a blank around the periphery of a plurality of smoking articles, and for conveying the box (30) to a subsequent processing stage. The box (30) includes a longitudinal axis line (32) and a pair of lateral walls (30e) extending along the longitudinal axis line (32) and having inner and outer lateral wall parts (34a and 34b) bonded to each other. In the conveyance path (26), the pair of lateral walls (30e) are positioned to extend in a direction crossing the conveyance path (26). The conveyance path (26) is provided with a conveyor (28) including a pair of conveyance walls (28a) between which the box (30) is held at the pair of lateral walls (30e), the conveyor (28) conveying the box (30) being held between the conveyance walls (28a). The pair of conveyance walls (28a) include respective pressing wall surfaces (28d) that substantially press the lateral walls (30e). At least one of the pressing wall surfaces (28d) has means (56, 58, 60) for making a total effective length (L) of the pressing wall surfaces (28d) along the longitudinal axis line (32) smaller than an entire length (La) of the lateral walls (30e).

Description

Packaging machine

The present invention relates to a packaging machine, and in particular, relates to a packaging machine including a conveyance path for folding a blank around a plurality of smoking articles to form a box, and thereafter conveying the box toward a subsequent processing stage. .

A conveyance path of this type of packaging machine is known that has a pair of conveyance walls and a conveyor that conveys a box while sandwiching a box between the conveyance walls. For example, the box body is sandwiched between transport walls by a pair of side walls extending along the longitudinal axis thereof, and the pair of side walls includes an inner and outer side wall parts bonded to each other. The side wall is transported while taking a posture extending in a direction crossing the transport path.

And Patent Document 1 discloses an apparatus including a conveyor for discharging cigarettes from a packaging machine. In this apparatus, a pair of belts that form a pair of conveyor walls of a conveyor to obtain a high-quality final product by appropriately drying without separating the bonded portion of the box that is a package containing cigarettes It is described that the pair of side walls of the box must be held tightly in between.

Specifically, during the transport of the box in the transport path, the pair of side walls of the box are pressed by the pressing wall surfaces of the belt forming the pair of transport walls of the conveyor. Thereby, these side wall parts will be mutually adhere | attached with the glue (adhesive) apply | coated to the glue application area | region of the side wall part which comprises a pair of side wall.

JP-T-2004-502608

However, when pressing the side wall of the box with the pressing wall of the belt in the transport path, the box body has a relatively high rigidity depending on the shape and type of the box, the shape of the contents to be stored in the box, and the like. On the other hand, while the pressing force acts intensively on the part, the reaction force of the side wall against the pressing force becomes small at the portion where the rigidity of the box is low, and it becomes easy to dent at the time of pressing.

In this way, when the pressing force applied from the pressing wall surface is concentrated at an unintended location, or when the pressing force escapes due to the dent, the size of the pressing force that is originally applied to the side wall is too small, or It may become uneven. In this case, it is impossible to reliably apply an appropriate amount of pressing force to the glue application area to favor the adhesion of the side wall portion constituting the side wall, resulting in poor adhesion of the box, and thus peeling of the glue application area. There is a possibility of incurring a defective molding of the box body.

The present invention has been made in view of such problems, and the object of the present invention is to apply the paste on the side wall of the box according to the shape and type of the box, the shape of the contents to be stored in the box, and the like. An object of the present invention is to provide a packaging machine that can suppress poor adhesion of a box and thus poor molding by reliably applying an appropriate pressing force to the cloth area.

In order to achieve the above object, the packaging machine of the present invention includes a conveyance path for folding a blank around a plurality of smoking articles to form a box, and thereafter conveying the box toward a subsequent processing stage. The box includes a longitudinal axis and a pair of side walls extending along the longitudinal axis and having inner and outer side wall portions bonded to each other. The transport path has a pair of transport walls that sandwich the box body with a pair of side walls, and includes a conveyor that transports the box body while sandwiching the box body between the transport walls. The pair of transport walls includes a pressing wall surface that substantially presses the side wall, and at least one of the pressing wall surfaces reduces the total effective length of the pressing wall surface along the longitudinal axis from the total length of the side wall. Have means.

According to the packaging machine of the present invention, by appropriately applying an appropriate pressing force to the paste application area on the side wall of the box according to the shape and type of the box, the shape of the container accommodated in the box, and the like. In addition, it is possible to suppress poor adhesion of the box, and thus molding defects.

It is the schematic of the packaging machine which concerns on one Embodiment of this invention. It is a perspective view of the cigarette package (box body) shape | molded with the packaging machine of FIG. It is the top view which looked at the main blank for forming the box of FIG. 2 from the back surface. It is the top view which looked at the sub blank for forming the box of FIG. 2 from the back surface. FIG. 2 is a partial cross-sectional view of the conveyor according to the first embodiment of the present invention as viewed from the direction of the arrow of the AA cross section of FIG. It is a partial cross section figure of the conveyor which concerns on 2nd Embodiment of this invention. It is a partial cross section figure of the conveyor which concerns on 3rd Embodiment of this invention. It is a partial cross section figure of the conveyor which concerns on 4th Embodiment of this invention. It is a partial sectional view showing the case where a long box is conveyed with the conveyor concerning a 5th embodiment of the present invention. It is a partial sectional view showing the case where a short box is conveyed with the conveyor concerning a 5th embodiment of the present invention.

Hereinafter, a packaging machine according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the packaging machine 1 of the present embodiment includes a hopper device 2. The hopper device 2 includes three

hoppers

2a, 2b, and 2c, and a large number of filter cigarettes are stored in these hoppers 2a to 2c. A plurality of accumulation pockets 4 are sequentially transferred to the lower part of the hoppers 2a to 2c. The hoppers 2a to 2c are arranged adjacent to the collecting pocket 4 in the transfer direction.

Each accumulation pocket 4 receives a predetermined number of filter cigarettes from each hopper 2a to 2c when passing through the lower part of the hopper 2a to 2c. As a result, when the accumulation pocket 4 has passed through all the three hoppers 2a to 2c, a cigarette bundle having a block shape is accommodated in the accumulation pocket 4. The cigarette bundle has 20 filter cigarettes, and these filter cigarettes are arranged in the accumulation pocket 4 in an upper, middle, and lower stacked state. For example, the upper and lower stages have seven filter cigarettes, and the middle stage has six cigarettes.

Thereafter, the accumulation pocket 4 is transferred along the transfer line to the first wheel 6 indicated by a one-dot chain line. As the first wheel 6 rotates, it receives the cigarette bundle from the accumulation pocket 4 and transfers the received cigarette bundle toward the second wheel 8 indicated by a one-dot chain line. The first and second wheels 6 and 8 are arranged in a vertical posture.

The second wheel 8 has a plurality of folding pockets 10, and these folding pockets 10 are arranged at equal intervals in the circumferential direction of the second wheel 8. As the second wheel 8 rotates, the folding pocket 10 receives the cigarette bundle from the first wheel 6 and also receives the sheet-like inner packaging material IW. The inner packaging material IW is supplied between the first and second wheels 6 and 8 from the inner packaging material supply device 12 and is pushed into the folding pocket 10 of the second wheel 8 together with the cigarette bundle. At this time, the inner packaging material IW is wound in a U shape around the cigarette bundle in the folding pocket 10.

As the second wheel 8 rotates, the cigarette bundle in the folding pocket 10 is transferred in the circumferential direction of the second wheel 8. In this transfer process, the end flap of the inner packaging material IW for closing the end surface of the cigarette bundle is folded into the inner packaging material IW wound around the cigarette bundle. Then, folding of the side flaps of the inner packaging material IW for closing both side surfaces of the cigarette bundle is also sequentially performed, whereby the inner pack IP is formed.

The third wheel 14 is adjacent to the second wheel 8, and the third wheel 14 and the first wheel 6 are separated from each other in the diameter direction of the second wheel 8. The third wheel 14 has a plurality of transfer pockets, and each transfer pocket sequentially receives the inner pack IP from the second wheel 8 as the third wheel 14 rotates. Thereafter, the inner pack IP is transferred in the circumferential direction of the third wheel 14 together with the transfer pocket.

Further, a fourth wheel 16 is adjacent to the third wheel 14, and the fourth wheel 16 is arranged in a horizontal posture in the same manner as the third wheel 14. The fourth wheel 16 has a plurality of transfer pockets and is positioned below the third wheel 14, and the third and

fourth wheels

14, 16 partially overlap each other in the vertical direction. . When the inner pack IP on the third wheel 14 reaches the fourth wheel 16, it transfers from the third wheel 14 into the transfer pocket of the fourth wheel 16, and thereafter, as the fourth wheel 16 rotates, its inner circumference Transported in the direction.

On the other hand, the fourth wheel 16 is connected to the sub-blank supply device 18, and the sub-blank supply device 18 supplies the sub-blank SB to the transfer pocket before the transfer pocket of the fourth wheel 16 receives the inner pack IP. To do. The sub-blank supply device 18 includes a web roll RS, and the web roll RS sends out the web WS along the supply path PSB.

In this supply path PSB, although not shown, a notch / cutter roller, a feed unit, and a cutting unit are sequentially arranged from the roll RS side. The feed unit supplies the web WS intermittently. In this supply process, the notch / cutter roller forms a pair of side fold lines on the web WS, and the cutting unit feeds the web WS every predetermined length. Cut and form the sub-blank SB.

When the transfer pocket of the fourth wheel 16 reaches the third wheel 14 after receiving the sub blank SB, the inner pack IP of the third wheel 14 is pushed into the transfer pocket together with the sub blank SB. At this time, the sub-blank SB is folded from the side folding line to form an inner frame, and this inner frame is bonded to the inner pack IP. Thereafter, the inner pack IP provided with the inner frame is transferred as the fourth wheel 16 rotates.

Further, a main blank supply device 20 is connected between the fourth wheel 16 and the fifth wheel 24, and the main blank supply device 20 is a main blank that is an outer packaging material on the inner pack IP on the fourth wheel 16. Supply MB. As shown in FIG. 1, the main blank supply device 20 includes a hopper 22 that stores the main blank MB. The main blank MB is transferred one by one from the hopper 22 along the supply path PMB to the fourth wheel 16 and supplied to the inner pack IP positioned at the supply position of the fourth wheel 16. The main blank MB is placed on the inner pack IP so as to sandwich the inner pack IP with the inner frame described above. At this time, the paste has already been applied to the

paste application areas

48, 50, and 51, which will be described later, on the main blank MB by a glue application device not shown.

The fifth wheel 24 is arranged in a vertical posture immediately above the supply position of the fourth wheel 16. The fifth wheel 24 has a plurality of folding pockets, and each folding pocket receives an inner pack IP including an inner frame and a main blank MB from the fourth wheel 16 as the fifth wheel 24 rotates. At this time, the pair of side flaps of the main blank MB are folded.

Thereafter, the received inner pack IP is transferred in the circumferential direction of the fifth wheel 24. In this transfer process, the remaining folding process for the main blank MB is sequentially performed, and as a result, the cigarette package SP is formed. . The packaging machine 1 includes a conveyance path 26, and the conveyance path 26 conveys the formed cigarette package SP toward a film packaging section that is a subsequent processing stage. In the film packaging section, the cigarette package SP is packaged by a film sheet, thereby forming the final product of the cigarette package SP.

Here, a conveyor 28 is provided in the transport path 26. The conveyor 28 includes a pair of endless belts (conveying walls) 28a and a plurality of rollers 28b around which the belt 28a is wound and guides the belt 28a along the conveying path 26 by rotation. By rotating and driving the rollers 28b, the conveyor 28 can sequentially convey a large number of cigarette packages SP to the film packaging section while sandwiching the cigarette packages SP between the pair of belts 28a.

As shown in FIG. 2, the cigarette package SP before being wrapped with a film sheet is formed as a box 30 in which a main blank MB and a sub-blank SB are folded around a cigarette bundle that is a plurality of smoking articles.
The box 30 has a rectangular parallelepiped shape, and includes a front wall 30a, a rear wall 30b, a top wall 30c, a bottom wall 30d, and a pair of side walls 30e.

Each side wall 30e extends along the longitudinal axis 32 of the box 30 and includes an inner side wall portion 34a in which the inner side flap of the main blank MB is folded, and an outer side wall portion 34b in which the outer side flap of the main blank MB is folded. Are bonded together.
The box body 30 of the present embodiment is formed with four round corners 36 that connect the front wall 30a and the side wall 30e and the rear wall 30b and the side wall 30e, respectively.

The box 30 forms a cigarette package SP that is a so-called hinge lid / round corner box having an outer body 30A and a lid 30C connected to the outer body 30A via a hinge 30B. The inner side wall portion 34a, the outer side wall portion 34b, and the round corner 36 described above are similarly formed on the lid 30C.

As shown in FIG. 3, the main blank MB includes a front panel 40a that forms the front wall 30a, a rear panel 40b that forms the rear wall 30b, a top panel 40c that forms the top wall 30c, and a bottom panel 40d that forms the bottom wall 30d. Inner and outer side flaps 40e and 40f for forming the inner and outer

side wall portions

34a and 34b, respectively, and a lid front panel 40g for forming the lid 30C, a lid flap 40h, and an outer side flap 40i. At the four corners of the top and

bottom panels

40 c and 40 d, arc-shaped round portions 42 are respectively provided, and the round portions 42 are positioned along the round corner 36 when the box body 30 is formed.

In order from the top in FIG. 3, the lid front panel 40g and the top panel 40c, the rear panel 40b and the top panel 40c, the rear panel 40b and the bottom panel 40d, and the front panel 40a and the bottom panel 40d are respectively formed when the box 30 is formed. They are connected via a folding line 44 to be folded. The fold lines 44 are reduced in length as compared with a square box that does not have the round corners 36 due to the incision associated with the formation of the round portion 42.
The round corner 36 is formed by cutting or pressing a plurality of linear fold lines 46 along the longitudinal axis 32 on the back surface of the main blank MB.

On the back surface of the outer side flap 40f of the main blank MB, a paste application region 48 is formed in a region along the outer contour of the outer side flap 40f. In the paste application area 48, glue as an adhesive is applied in a linear or dot shape. When the box 30 is formed, the inner and outer side flaps 40e and 40f are bonded to each other in the paste application region 48, thereby forming a pair of side walls 30e to which the inner and outer

side wall portions

34a and 34b are bonded.

Further, a glue application area 50 which is smaller than the glue application area 48 is formed in the upper part of the back surface of the inner side flap 40e of the main blank MB as seen in FIG. Further, a paste application area 51 is also formed in the outer side flap 40i of the lid C.
As shown in FIG. 4, the sub-blank SB includes a front panel 52a and side flaps 52b located on both sides of the front panel 52a. A plurality of folding lines 54 similar to the folding lines 46 that form a part of the round corner 36 are formed on the back surface of the sub-blank SB.

The surface of the side flap 52b of the sub-blank SB is bonded to the glue application area 50 on the back surface of the inner side flap 40e when the box 30 is molded, and the inner pack IP including the inner frame and consequently the inner frame and the main blank MB is formed. Molded.

<First Embodiment>
As shown in FIG. 5, the box 30 is disposed in the conveyance path 26 so that the pair of side walls 30 e extend in a direction (the width direction of the belt 28 a) across the conveyance path 26. The belt 28a is sandwiched between a pair of side walls 30e. Here, a guide (not shown) is provided between the fifth wheel 24 and the conveyor 28. The guide positions the longitudinal axis 32 of the box 30 in the width direction of the belt 28a when the box 30 is conveyed from the fifth wheel 24 to the conveyor 28.

Further, this guide is provided, for example, on the bottom wall 30d side of the box 30 and positions the conveyance reference position with respect to the belt 28a of the box 30 on the longitudinal axis 32 with reference to the bottom wall 30d. Two guides may be provided on both the bottom wall 30d side and the top wall 30c side of the box body 30, and the box body 30 may be positioned with respect to the belt 28a with reference to the bottom wall 30d and the top wall 30c.

The belt 28a is formed by, for example, laminating an outer base sheet (not shown) and an inner felt sheet as seen from the conveyance path 26. The roller 28b comes into contact with the rubber sheet, and the rotational driving force of the roller 28b is transmitted to the belt 28a by friction, for example. The roller 28b of the present embodiment is a so-called flat roller having substantially the same diameter over the longitudinal axis 32, and the center of the longitudinal axis 32 of the roller body is substantially positioned at the center in the width direction of the belt 28a. .

On the pair of belts 28a facing each other in the transport path 26, a pressing wall surface 28d that presses the side wall 30e when the box body 30 is transported is formed on the transport path 26 side (felt sheet side). When the roller 28b is driven to rotate and guides the belt 28a along the conveyance path 26, a predetermined tension acts on the belt 28a. Due to the tension of the belt 28a and the elastic force based on the rubber sheet, the pair of pressing wall surfaces 28d facing each other in the transport path 26 is a predetermined pair of side walls 30e indicated by arrows during transport of the box 30 in the transport path 26. Are pressed substantially by the pressing force F, and the box 30 is clamped.

And in this embodiment, the notch part 56 which becomes non-contact with the edge part of the side wall 30e in the edge part of the press wall surface 28d facing the edge part of the side wall 30e during conveyance of the box 30 in the conveyance path 26 is provided. Is formed. The notch 56 is formed by notching the surface of both end portions of the pressing wall surface 28d until reaching the edge of the belt 28a, and scraping the thickness t (for example, 2 mm) of the belt 28a by a predetermined reduction width (for example, 1 mm). It is formed by giving. Thus, the notch 56 reduces the total effective length L of the pressing wall surface 28d that substantially presses the side wall 30e to less than the total length La of the side wall 30e (means).

As described above, in the present embodiment, the notched portions 56 are provided at both ends of the pressing wall surface 28d, so that the pressing wall surface 28d avoids the vicinity of the top wall 30c and the bottom wall 30d of the box 30 and the side wall 30e. Press.
Here, conventionally, the top wall 30c and the bottom wall 30d of the box body 30 function as a support wall for the box body 30 when the side wall 30e is pressed by the pressing wall surface 28d, and the box body 30 has a relatively high rigidity. It becomes. For this reason, a pressing force F larger than the pressing force F acting on the side wall 30e is concentrated on the top wall 30c and the bottom wall 30d based on the law of action and reaction of force.

On the other hand, as described above, the folding lines 44 formed between the rear and

top panels

40b and 40c and between the front and

bottom panels

40a and 40d are formed in the case of a square box due to the notches accompanying the formation of the round portion 42. Shorter than Due to the shortening of the folding line 44, the rigidity of both ends of the pair of side walls 30e is reduced, the reaction force against the pressing force F is reduced, and the side walls 30e are easily depressed when pressed by the pressing wall surface 28d.

Thus, conventionally, in the vicinity of both end portions of the side wall 30e, there are both a portion where the pressing force F acts intensively and a portion where the pressing force F is easily recessed. For this reason, the pressing force F having an appropriate size cannot be applied to the

paste application areas

48 and 50 formed on the side wall 30e, and the box body 30 accompanying the adhesion failure of the box body 30 and the peeling of the

paste application areas

48 and 50 is not achieved. There was a risk of causing molding defects.

However, in this embodiment, the pressing wall surface 28d presses the side wall 30e while avoiding the vicinity of both end portions of the side wall 30e including the top wall 30c and the bottom wall 30d of the box 30. Accordingly, it is possible to reliably apply a pressing force F having an appropriate size to the

paste application areas

48 and 50, and to form a uniform pressure distribution in the

paste application areas

48 and 50. It is possible to effectively suppress the adhesion failure and thus the molding failure.

Second Embodiment
Hereinafter, with reference to FIG. 6, the conveyor 28 of the packaging machine 1 which concerns on 2nd Embodiment of this invention is demonstrated. In addition, about description of each subsequent embodiment, the content different from 1st Embodiment is mainly demonstrated, About another content, description may be abbreviate | omitted by attaching | subjecting the same code | symbol etc. in drawing.

As shown in FIG. 6, the pressing wall surface 28 d of the present embodiment has a width W that extends in a direction crossing the transport path 26. This width W is set shorter than the overall length La of the side wall 30e. Thereby, the total effective length L of the pressing wall surface 28d that substantially presses the side wall 30e is inevitably reduced from the total length La of the side wall 30e (means). For this reason, as in the case of the first embodiment, the pressing wall surface 28d can press the side wall 30e while avoiding the vicinity of both end portions of the side wall 30e. Therefore, also in this embodiment, it is possible to reliably apply an appropriate pressing force F to the

paste application areas

48 and 50, and to effectively suppress poor adhesion of the box body 30 and poor molding.

<Third Embodiment>
As shown in FIG. 7, the pressing wall surface 28 d of the present embodiment has a recess 58 that is not in contact with the side wall 30 e during the transport of the box 30 in the transport path 26. The concave portions 58 are provided at both ends of the pressing wall surface 28d, and the total effective length L of the pressing wall surface 28d that substantially presses the side wall 30e is made smaller than the total length La of the side wall 30e (means). For this reason, as in the case of the first embodiment, the pressing wall surface 28d can press the side wall 30e while avoiding the vicinity of both end portions of the side wall 30e. Therefore, also in this embodiment, it is possible to reliably apply an appropriate pressing force F to the

paste application areas

<Fourth embodiment>
As shown in FIG. 8, the curved part 60 is formed in the edge part of the press wall surface 28d of this embodiment. The curved portion 60 has an arc shape that is separated from the side wall 30e during conveyance of the box body 30 in the conveyance path 26, and the total effective length L of the pressing wall surface 28d that substantially presses the side wall 30e is the side wall. The total length La is less than 30e (means). For this reason, as in the case of the first embodiment, the pressing wall surface 28d can press the side wall 30e while avoiding the vicinity of both end portions of the side wall 30e. Therefore, also in this embodiment, it is possible to reliably apply an appropriate pressing force F to the

paste application areas

<Fifth Embodiment>
As shown in FIG. 9, the conveyor 28 of this embodiment uses a crown roller 62 in place of the roller 28b which is a flat roller. The crown roller 62 has a central diameter in the direction of the longitudinal axis 32 of the roller main body that is larger than the diameter of the end portion, while bringing the belt 28a into contact with the side wall 30e substantially evenly while suppressing the deflection of the roller main body, The belt 28a has a function of suppressing meandering.

Further, the box 30L shown in FIG. 9 is a long box in which the length of the longitudinal axis 32 is longer than that of the box 30, and the width W of the pressing wall surface 28d corresponds to the box 30L, which is the first embodiment. It is set longer than in the case of. Moreover, the notch part 56 is formed in the both ends of the pressing wall surface 28d.

On the other hand, the box 30S shown in FIG. 10 is a short box having a length of the longitudinal axis 32 shorter than that of the box 30, and the width W of the pressing wall surface 28d is set to the same length as in FIG. Has been. Moreover, the notch part 56 is formed in the both ends of the pressing wall surface 28d. However, the cutout portion 56 located on the top wall 30c side of the pressing wall surface 28d has a long range on the longitudinal axis 32 up to a range where the end portion of the side wall 30e of the box 30S is not in contact with the case shown in FIG. It is formed over.

As described above, in the present embodiment, by using the crown roller 62 for the conveyor 28, the belt 28a can be brought into substantially uniform contact with the side wall 30e, and meandering of the belt 28a can be suppressed. Accordingly, even when the long size box 30L or the short size 30S is transported, the total effective length of the pressing wall surface 28d that substantially presses the side wall 30e due to the pressing wall surface 28d having the notch 56. L is reduced from the overall length La of the side wall 30e (means). Therefore, it is possible to press the side wall 30e while avoiding the vicinity of both end portions of the side wall 30e, and it is possible to suppress poor adhesion of the

boxes

30L and 30S, and thus molding defects.

Moreover, even when the box body 30L, which is a long box, and the box body 30S, which is a short box, are transported, the position of a guide provided between the fifth wheel 24 and the conveyor 28 is adjusted in advance. Without changing the transport reference position of the

bodies

30L and 30S, and without changing the crown roller 62, simply changing the width W of the pressing wall surface 28d and the formation range of the notch 56 to the belt 28a, It is possible to effectively suppress poor adhesion of the

boxes

30L and 30S and thus molding defects.

Although the description of the embodiments of the present invention has been completed above, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the present invention.
For example, there may be a space in the

box

30, 30 </ b> L, 30 </ b> S (hereinafter collectively referred to as the box 30) in which no container such as a smoking article exists. Alternatively, there may be a case where a member such as a spacer for filling the space or partitioning the contents is accommodated in the box 30.

In these cases, when the side wall 30e is pressed by the pressing wall surface 28d, there are various places where the pressing force F acts intensively and where the pressing force F is easily depressed, in addition to both ends of the side wall 30e. It will be. Therefore, in the present invention, the position of each means described above that is not in contact with the end of the side wall 30e during the transport of the box 30 in the transport path 26 is not limited to the above embodiments. Moreover, the side wall 30e is substantially formed in order to reliably apply an appropriate pressing force F to the

paste application areas

48 and 50 of the side wall 30e according to the shape and type of the box 30 and the shape of the contents to be stored in the box. Various means that allow the total effective length L of the pressing wall surface 28d to be pressed to be smaller than the total length La of the side wall 30e are allowed.

Specifically, in each of the embodiments described above, each means is provided on both of the pair of pressing wall surfaces 28d so as not to contact the end of the side wall 30e during the transport of the box body 30 in the transport path 26. . However, the present invention is not limited to this, and the means may be provided only on one of the pair of pressing wall surfaces 28d.
In each of the above embodiments, the means is formed at both end portions of the pressing wall surface 28d facing both end portions of the side wall 30e. However, the above means may be provided in a spot manner at a portion other than both end portions of the pressing wall surface 28d.

Further, the above means may be provided not only at both end portions of the pressing wall surface 28d but also at one end portion of the pressing wall surface 28d.
Moreover, you may form the convex part which is not shown in figure which increases the pressing force F with respect to the side wall 30e during conveyance of the box 30 in the conveyance path 26 in at least one of a pair of press wall surface 28d. By forming the convex portion of the pressing wall surface 28d corresponding to the location where the side wall 30e is easily peeled according to the arrangement of the space and the spacer described above, poor adhesion and thus poor molding of various shapes and types of boxes. Can be effectively suppressed.

Further, although the fifth embodiment has been described on the assumption of the case of the first embodiment, it can also be applied to the cases of the second to fourth embodiments.
Moreover, in each embodiment, it demonstrated on the assumption that the box 30 was the cigarette package SP used as a hinge lid round corner box. However, the present invention is not limited to this, and the present invention can also be applied to forming a square box having no round corner 36, a cigarette package SP other than a hinge lid, and a box 30 for uses other than the cigarette package SP.

Here, when the box body 30 is a round corner box, it has a folding line 46 for forming the round corner 36, and therefore, the preliminary folding of the inner and

outer side flaps

40e, 40f is weaker than that of the square box. To be applied. For this reason, the round corner box tends to have a greater restoring force against the preliminary folding of the inner and outer side flaps 40e and 40f than the square box. Therefore, when the box body 30 is a round corner box, due to the restoring force, poor adhesion of the box body 30 and thus poor molding are more likely to occur than in the case of a square box.

On the other hand, when the box body 30 is a square box, the folding line 44 is not shortened due to the formation of the round portion 42, so that the rigidity of at least both end portions of the side wall 30 e does not decrease. There is no easy part in the box 30. This is also one of the factors in which the box 30 is more likely to cause poor adhesion and thus poor molding than the square box when the box 30 is a round corner box.

As described above, due to the above-described structural difference between the round corner box and the square box, when the present invention is applied to the round corner box, it is possible to more effectively suppress the adhesion failure of the box body 30 and the molding failure. it can.
Moreover, if the packaging machine 1 is provided with the conveyor 28 which has the means mentioned above, it will not be limited to the structure mentioned above, A various form can be assumed. For example, a heater (not shown) may be provided in the transport path 26 and adhesion of the box body 30 may be promoted by drying.

1 Packaging Machine 26 Conveyance Route 28 Conveyor 28a Belt (Conveying Wall)
28d Pressure wall 30 Box (cigarette pack)

30a Front wall

30b Rear wall

30c Top wall

30d Bottom wall

30e Side wall

30A Outer body 30B Hinge 30C Lid 30L Box (cigarette pack, long box)
30S box (cigarette pack, short box)
32 Longitudinal axis 34a Inner side wall portion 34b Outer side wall portion 36 Round corner 56 Notch (means)
58 Recess (Means)
60 Curved part (means)
62 Crown Roller MB Main Blank (Blank)
SB sub blank (blank)
F Pressing force W width

Claims

A packaging machine including a conveyance path for folding a blank around a plurality of smoking articles to form a box, and then conveying the box toward a subsequent processing stage,
The box includes a longitudinal axis and a pair of side walls extending along the longitudinal axis and having inner and outer side wall portions bonded to each other, and the pair of side walls are within the transport path. Take a posture that extends in a direction that crosses
The transport path includes a pair of transport walls that sandwich the box body between the pair of side walls, and includes a conveyor that transports the box body while sandwiching the box body between the transport walls,
Each of the pair of transport walls includes a pressing wall surface that substantially presses the side wall,
At least one of the pressing wall surfaces has a means for reducing the total effective length of the pressing wall surfaces along the longitudinal axis from the total length of the side walls.
The box has a rectangular parallelepiped shape, and further includes a front wall, a rear wall, a top wall, and a bottom wall,
The packaging machine according to claim 1, wherein the means is formed on a portion of the pressing wall surface facing at least one end of the side wall.
The pressing wall surface has a notch that is in non-contact with the end of the side wall during transport of the box in the transport path,
The packaging machine according to claim 2, wherein the notch forms the means.
The wrapping machine according to claim 2, wherein the pressing wall surface has a width extending in a direction crossing the conveyance path, and the width is shorter than an entire length of the side wall to realize the means.
The pressing wall surface has a recess that is not in contact with the side wall during the transport of the box in the transport path,
The packaging machine according to claim 1 or 2, wherein the recess forms the means.
The means is formed as a curved portion in the portion of the pressing wall surface,
The packaging machine according to claim 2, wherein the curved portion has an arc shape that is separated from the side wall during conveyance of the box body in the conveyance path.
The conveyor includes a pair of belts forming the pair of conveying walls;
The packaging machine according to any one of claims 1 to 6, further comprising a plurality of crown rollers that guide the belt along the conveyance path.
The packaging according to any one of claims 1 to 7, wherein at least one of the pressing wall surfaces has a convex portion that increases a pressing force against the side wall during transport of the box in the transport path. Machine.
The packaging machine according to any one of claims 1 to 8, wherein the box includes four round corners that connect between the front wall and the side wall and between the rear wall and the side wall.
The packaging machine according to any one of claims 1 to 9, wherein the box includes an outer body and a lid connected to the outer body via a hinge.