CN107074382B

CN107074382B - Blank supply device and blank supply method using same

Info

Publication number: CN107074382B
Application number: CN201580055859.5A
Authority: CN
Inventors: 丹保仁; 隅大辅; 铃木慎也
Original assignee: Japan Tobacco Inc
Current assignee: Japan Tobacco Inc
Priority date: 2014-08-28
Filing date: 2015-08-28
Publication date: 2020-03-03
Anticipated expiration: 2035-08-28
Also published as: RU2672343C2; EP3176097A4; WO2016031010A1; EP3753854A1; RU2017109963A; KR101979129B1; JP6295336B2; JPWO2016031984A1; KR20170047350A; EP3176097A1; CN107074382A; WO2016031984A1

Abstract

The invention provides a supply device (8) for supplying a blank (10) forming an outer box (14) of a packing box to a packing machine (12), comprising: a conveying path (26) for conveying the blanks one by one along a conveying surface (40); a pair of rollers (30) are rotatably arranged by separating the conveying surface, and have pressing areas (46, 52) on the outer peripheral surfaces (42c, 44c), the pressing areas (46, 52) press the belt-shaped area (24) of the blank corresponding to the corner edge (16) of the outer box and send out the blank, one (42) of the pair of rollers has a plurality of blades (48) in the pressing area, when the blank passes between the pair of rollers, the blades form a plurality of cut-in lines (58, 90, 94, 96) for reducing the bending strength of the belt-shaped area in the belt-shaped area of the blank.

Description

Blank supply device and blank supply method using same

Technical Field

The present invention relates to a blank supply device and a blank supply method using the same, and more particularly to a blank supply device for supplying a blank for forming a packing outer box such as a hinge-lid pack for cigarettes to a packing machine and a blank supply method using the same.

Background

Patent document 1 discloses a package box manufacturing apparatus that prints a raw material web according to the design of a package box, cuts a blank from the raw material web, and performs punching and embossing on the blank.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2013/037463

Disclosure of Invention

Problems to be solved by the invention

Some of the outer cases of the packing box have rounded edges (rounded) along the corner edges in the longitudinal direction thereof. In order to manufacture such an outer box, it is necessary to form a folding line in a circular edge region of a blank for forming the outer box, and to perform a preliminary treatment at the time of forming.

Currently, the processing of an unfolded blank before folding is requested to a printer who performs printing of the blank. Specifically, the printer prints the raw material web before separating into the individual blanks, and performs punching by an imprint method using a platen or the like. In this case, the folding lines are also formed collectively as a pressing line by embossing, and the raw material web is cut to form each blank.

Recently, since the outer box of the packing box is required to have a widely varied design, a punched portion or a folding line of a blank is often required to have a complicated shape. In the case where the shape of the folding line is different, a platen corresponding to the shape needs to be prepared, resulting in a high manufacturing cost. In order to reliably form the folding line in the blank, the pressing force of the pressing platen needs to be finely adjusted as compared with the case where only the punched portion is formed in the blank, and the entire pressing platen needs to be uniformly pressed. When the pressing force of the pressing plate is not appropriate or the pressing force is not uniform in the pressing plate, the folding line formed in the blank may be too shallow or too deep. The failure of such fold lines also depends on the grammage and density of the stock web used as the blank.

If the folding line formed in the blank is too shallow, the resistance (restoring force) of the blank to return to the flat state before folding becomes large, and therefore, in the packaging machine of the packing box, it is difficult to form a round edge in the process of folding the outer box. Therefore, undesired bulging of the outer box occurs and separation of the bonded portions of the blank due to the occurrence of bulging occurs, and the outer box and the packing box may become defective.

On the other hand, if the folding line formed in the blank is too deep, the platen is pressed too far into the raw material web, and separation of the platen and the raw material web becomes difficult. Further, since the portion of the folding line adjacent to the blank may be cut, the blank may be defective.

In addition, in the preliminary treatment for forming the outer box of the packing box, a preliminary folding step of previously folding the blank to give a folded shape to the blank may be performed in addition to the processing of the folding line to the blank.

In such a preliminary folding step, particularly in the case of using a blank having a small paper thickness, the blank has a small resistance to return to a flat state before folding. Therefore, when the folded portion of the blank is an inner flap located inside the outer box, the inner flap is in a posture of being excessively inclined toward the inside of the outer box. In this case, the inner side flaps are separated from the outer side flaps located outside the outer box when the outer box is formed, and the opposing flaps cannot be overlapped with each other and properly joined by paste or the like, and the box or the packaging box may become defective.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a blank supply device and a blank supply method using the same, which can suppress the deviation of the blank quality and easily improve the productivity and quality of an outer box and a packing box by controlling the folded shape of the blank.

Means for solving the problems

In order to achieve the above object, the present invention provides a blank supplying apparatus for supplying a blank forming an outer box of a packing box to a packing machine, the blank supplying apparatus including: a conveying path extending from a supply source of the blanks to the packaging machine, the conveying path conveying the blanks one by one along a conveying surface; and a pair of rollers rotatably disposed with the conveying surface therebetween, and having a pressing area on an outer peripheral surface thereof for feeding out the blank while pressing a strip-shaped area of the blank corresponding to a corner edge of the outer box, wherein one of the pair of rollers has a plurality of blades in the pressing area thereof, and when the blank passes between the pair of rollers, the blades form a plurality of cut-in lines in the strip-shaped area of the blank which reduce a bending strength of the strip-shaped area.

In another aspect, the present invention provides a blank supplying method for supplying a blank forming an outer box of a packing box to a packing machine, wherein the supplying method includes a cutting step of conveying the blank one by one along a conveying surface from a blank supply source to the packing machine, and forming a plurality of cut lines for reducing a bending strength of a strip-shaped region of the blank in the strip-shaped region while pressing the strip-shaped region of the blank corresponding to a corner edge of the outer box.

Effects of the invention

According to the blank supply device and the blank supply method using the same of the present invention, the blank, the outer box, and the packing box can be easily produced and quality can be improved by controlling the folded shape of the blank.

Drawings

Fig. 1 is a side view of a hinge-lid pack manufacturing machine including a blank supply device according to a first embodiment of the present invention;

FIG. 2 is a top view of the manufacturing machine of FIG. 1;

FIG. 3 is a perspective view showing an outer box of the hinge-lid pack of FIG. 1;

fig. 4 is a plan view of an unfolded blank for forming the outer box of fig. 3, as viewed from the rear side, which becomes the inner surface of the outer box;

fig. 5 is a front view of the conveying roller of fig. 1 as viewed from the side of the pre-folding table;

fig. 6 is a plan view of the blank passing through the feed rollers in fig. 5 as viewed from the back side;

fig. 7 is an enlarged cross-sectional view of a portion of the blank having the cut-in line of fig. 6 formed therein;

FIG. 8 is a front view of the pre-folding stage of FIG. 1 as viewed from the side of the folding turret;

FIG. 9 is a top view of the pre-folding station of FIG. 8;

fig. 10 is a front view showing a modification of the cutting roller of fig. 5;

FIG. 11 is a front view showing a modification of the receiving roller of FIG. 5;

FIG. 12 is a plan view of a blank that may be formed using the rollers of FIG. 10 or FIG. 11;

fig. 13 is a front view showing another modification of the cutting roller of fig. 5;

FIG. 14 is a plan view of a blank that may be formed using the cutting rolls of FIG. 13;

FIG. 15 is a perspective view showing an outer box formed from the blank of FIG. 14;

fig. 16 is a front view showing another modification of the cutting roller of fig. 5;

FIG. 17 is a plan view of a blank that may be formed using the cutting rolls of FIG. 16;

FIG. 18 is a perspective view showing an outer box formed from the blank of FIG. 17;

fig. 19 is a perspective view showing a state where a lid of the hinge-lid pack is opened;

fig. 20 is a plan view of a preliminary folding table provided in a blank feeding device according to a second embodiment of the present invention;

FIG. 21 is a cross-sectional view of an outer box formed by folding a thin blank in the same manner;

FIG. 22 is a cross-sectional view of an outer box formed by pre-folding the thin blank at the pre-folding station of FIG. 20;

fig. 23 is a plan view of a preliminary folding stage which becomes a modification of fig. 20;

fig. 24 is a front view of a folding table serving as another modification of fig. 20.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

< first embodiment >

Fig. 1 is a side view of a manufacturing machine 2 of a hinge-lid pack 1 (hereinafter, also referred to simply as a pack 1) including a blank supply device according to a first embodiment of the present invention, and fig. 2 is a plan view of the manufacturing machine 2. The manufacturing machine 2 includes: a blank magazine (supply source) 4, an adsorption part 6, a blank supply device 8, a blank 10 folding turntable (packing machine) 12, and the like.

Fig. 3 is a perspective view showing the outer box 14 of the package box 1 according to the present embodiment. In the outer case 14, 4 corner edges 16 along the longitudinal direction thereof are formed as rounded edges (circles), and in the case of the present embodiment, the corner edges 16 are formed by connecting planes inclined in a single step.

Fig. 4 is a plan view of the unfolded spread blank 10 for forming the outer box 14 of fig. 3, as viewed from the back side 18 which becomes the inner surface of the outer box 14.

The blank 10 is substantially composed of a central portion 20 and a pair of flap portions 22 formed at both ends with the central portion 20 interposed therebetween. Each flap portion 22 is composed of a pair of inner flaps 22a disposed at the center in the longitudinal direction of the blank 10 and positioned inside the outer box 14 when the outer box 14 is formed, and a pair of outer flaps 22b disposed at both ends in the longitudinal direction of the blank 10 and positioned outside the outer box 13 when the outer box 14 is formed.

An adhesive surface 22a1 such as paste shown in fig. 4 is formed on each inner side flap 22a, and the inner and

outer side flaps

22a, 22b facing each other when the outer box 14 is formed are adhered to each other by the adhesive surface 22a 1. The blank 10 is formed to have a band-shaped region 24 corresponding to the corner edge 16 of the outer box 14. The belt-like region 24 extends parallel to the longitudinal axis of the blank 10 along a conveyance path 26 (see fig. 1 and 2) provided in the supply device 8, and is formed at two locations across the center portion 20 and the pair of flap portions 22.

As shown in fig. 1 and 2, a plurality of blanks 10 shown in fig. 4 are stacked on the blank case 4. The blanks 10 are sucked one by the suction unit 6 from the bottom of the blank case 4 and continuously drawn out to the supply device 8.

The supply device 8 includes: a conveyance path 26,

conveyance rollers

28, 30, 32,

conveyance trays

34, 36, a pre-folding table 38, and the like.

The transport path 26 extends from the blank case 4 to the pre-folding table 38 and further to the folding turret 12, and the blanks 10 are transported one by one along the transport surface 40 of the transport path 26 by the

transport rollers

28 and 30 and the

transport trays

34 and 36. The

conveyance rollers

28 and 30 and the

conveyance trays

34 and 36 are disposed at appropriate intervals so that the blanks 10 drawn out from the blank cassette 4 to the conveyance path 26 can be conveyed to the pre-folding table 38 and further to the folding turn table 12 one by one.

The feed roller 28 is composed of a pair of

rollers

28a and 28b rotatable with a feed surface 40 interposed therebetween. The blanks 10 pass between the

rollers

28a, 28b, and thus the pair of

rollers

28a, 28b pinch the blanks 10 while rotating at the same peripheral speed, and feed and convey the blanks one by one along the conveying path 26. The feed roller 30 also feeds out and feeds the blank 10 like the feed roller 28.

The

conveyance trays

34 and 36 are rotatably disposed above the conveyance surface 40, and the

conveyance trays

34 and 36 convey the material 10 to push the material 10 forward in the conveyance path 26 by passing the material 10 under the

conveyance trays

34 and 36.

Fig. 5 is a front view of the conveying roller 30 viewed from the side of the pre-folding table 38. The conveying roller 30 is disposed only upstream of the pre-folding table 38, and is composed of a cutting roller 42 disposed above the conveying surface 40 and a receiving roller 44 disposed below the conveying surface 40.

The cutting roller 42 includes a drive shaft 42b for driving the roller body 42a to rotate in the direction of the arrow. In the roller main body 42a, that is, in the outer peripheral surface 42c of the cutting roller 42, belt-shaped pressing regions 46 are formed at positions corresponding to the respective belt-shaped regions 24 of the material 10. In the pressing region 46, a plurality of blades 48 are formed over the entire circumference of the outer circumferential surface 42 c. Each blade 48 has a tip 48a along the circumferential direction of the outer peripheral surface 42c, the tip 48a of the blade 48 is formed into a V shape having an acute angle, and the tip lengths of the blades 48 are substantially the same. The roller body 42a and the drive shaft 42b are detachable by bolts 50.

On the other hand, the receiving roller 44 also includes a drive shaft 44b that rotationally drives the roller main body 44a in the arrow direction. In the roller main body 44a, that is, in the outer peripheral surface 44c of the receiving roller 44, strip-shaped pressing regions 52 are formed flatly at positions corresponding to the respective strip-shaped regions 24 of the material 10. The roller body 44a and the drive shaft 44b are detachable by bolts 54.

The blade portions 48 formed in the pressing regions 46 on the outer peripheral surface 42c of the cutting roller 42 protrude toward the pressing regions 52 on the outer peripheral surface 44c of the receiving roller 44 with a predetermined gap G therebetween. The drive shaft 42b of the cutting roller 42 and the drive shaft 44b of the receiving roller 44 are connected to a gap adjusting device 56. The gap adjusting device 56 can adjust the gap G between the cutting roller 42 and the receiving roller 44 by moving the

drive shafts

42b and 44b up and down.

Fig. 6 is a plan view of the blank 10 passing through the conveying roller 30 as viewed from the back surface 18. When the material 10 passes between the pair of cutting rollers 42 and the receiving roller 44, the material 10 is fed out while the

pressing regions

46 and 52 of the cutting rollers 42 and the receiving roller 44 press the respective belt regions 24 of the material 10. At this time, the blade portion 48 cuts the back surface 18 of each band-shaped region 24 of the blank 10 at a predetermined depth with respect to the thickness of the blank 10, and a plurality of cut lines 58 are formed on the back surface 18. The cut-in line 58 extends parallel to the longitudinal axis of the blank 10, and reduces the bending strength of the band-shaped region 24 by thinning the band-shaped region 24 of the blank 10. In addition, the gap G between the pair of cutting rollers 42 and the receiving roller 44 is determined according to the required depth of the cutting line 58 of the blank 10.

Fig. 7 is an enlarged cross-sectional view of a part of the blank 10 on which the cut-in line 58 is formed. The gap G between the cutting roller 42 and the receiving roller 44 is set to a range of 20% to 50% of the thickness T (for example, 0.25mm to 0.35mm) of the blank 10, for example. In this case, as shown in fig. 7, a plurality of cut lines 58 having a certain depth D in the range of, for example, 50% to 80% of the thickness T of the blank 10 are formed in the blank 10 so as to form, for example, acute valley shapes (V-shapes).

As shown in fig. 1 and 2, the pre-folding table 38 is disposed at a pre-folding position on the conveyance path 26 set in the vicinity of the downstream of the conveyance roller 30 (i.e., the pair of cutting rollers 42 and the receiving roller 44). When the blank 10 is positioned at the pre-folding position, the pre-folding stage 38 pre-folds the strip-shaped region 24 of the blank 10, and as shown in fig. 3, gives the strip-shaped region 24 a folded shape corresponding to the circular edge of the outer box 14, specifically, a pre-folding angle.

Fig. 8 is a front view of the pre-folding table 38 as viewed from the folding turn table 12 side, and fig. 9 is a plan view of the pre-folding table 38. The pre-folding table 38 includes: a folding guide 60, a mounting table 62, two folding roller arrays (folding members) 64A and 64B, and a lifting device 66.

The folding guide 60 is disposed on the table 62, and overlaps the blank 10 with the table 62.

The pre-folding guide 60 is formed in a plate shape having outer edges 68 near both ends of the table 62. The outer edge 68 extends along the conveying path 26, is formed in an arc shape corresponding to the circular edge of the outer box 14, is disposed on both sides of the pre-folding guide 60, and defines the width of the conveying surface 40. The outer edge 68 forms a radius of curvature R (e.g., 2.5mm) that is less than the radius of curvature of a rounded edge (e.g., 4 mm).

When the blank 10 is overlapped with the preliminary folding guide 60, the lower surface 60a of the preliminary folding guide 60 abuts against the blank 10. A convex portion that is downward, that is, a convex curved surface portion 70 that is convex toward the opposite side to the folding direction of the flap portion 22 is formed at the center of the cross section of the pre-folding guide 60 on the lower surface 60a of the pre-folding guide 60.

Further, concave curved surface portions 72 are formed on the lower surface 60a of the pre-folding guide 60, and the concave curved surface portions 72 are connected to both ends of the convex curved surface portion 70 by smooth arcs and are recessed upward (i.e., in the folding direction of the flap portion 22). Each concavely curved surface portion 72 is connected in a smooth arc to the respective adjacent outer side edge 68.

The table 62 forms the conveyance path 26, and when the blank 10 is overlapped with the pre-folding guide 60, the blank 10 abuts against an upper surface 62a of the table 62 which becomes the conveyance surface 40 of the conveyance path 26.

The upper surface 62a of the mounting table 62 is formed to have a concave curved surface portion 74 and convex curved surface portions 76 corresponding to the convex curved surface portion 70 and the concave curved surface portions 72 formed on the lower surface 60a of the pre-folding guide 60, respectively. That is, the upper surface 62a of the table 62 and the lower surface 60a of the pre-folding guide 60 are formed in complementary shapes. At the preliminary folding position, the central portion 20 of the blank 10 is sandwiched and pressed between the convex curved surface portion 70 and each concave curved surface portion 72 of the preliminary folding guide 60, and the concave curved surface portion 74 and each convex curved surface portion 76 of the table 62.

The

folding roller arrays

64A and 64B are disposed near both ends of an outer edge 68 of the preliminary folding guide 60, and have

shafts

65A and 65B extending along the outer edge 68, respectively. For example, one first folding roller (first folding member, folding roller) 67a and 3 second folding rollers (second folding member, folding roller) 67B are rotatably supported by the

shafts

65A and 65B, respectively.

The first folding roller 67a gives a preliminary folding angle to the inner flap 22a by folding the inner flap 22a, while the second folding roller 67b gives a preliminary folding angle to the outer flap 22b by folding the outer flap 22 b. The first and

second folding rollers

67a and 67b have first and second pressing surfaces 67a1 and 67b1 formed on the outer peripheral surfaces thereof, respectively, and press the outer edge 68 via the belt-shaped region 24.

In the case of the present embodiment, the first and

second folding rollers

67a and 67b have circular cross sections with the same diameter, the first and second pressing surfaces 67a1 and 67b1 have the same radius of curvature, and the distance between the first pressing surface 67a1 and the outer edge 68 when the pre-folding angle is given is equal to the distance between the second pressing surface 67b1 and the outer edge 68.

The

folding roller arrays

64A and 64B are rotatably coupled to a link mechanism of the lifting device 66, and the folding rollers 67a and 67B are moved along a rail 78 indicated by an arrow in fig. 8 via the link mechanism by the operation of the lifting device 66.

Specifically, when the blank 10 is positioned at the preliminary folding position, first, the blank 10 placed on the placement table 62 is overlapped with the preliminary folding guide 60, and the flap portion 22 including the band-shaped region 24 of the blank 10 protrudes from the outer edge 68.

Next, by operating the lifting device 66, the

folding rollers

67a, 67b move along the circular arc rail 78 surrounding the outer side of the outer edge 68 located in the vicinity thereof, and fold the flap portion 22 while pressing the strip-shaped region 24 of the blank 10 along the outer edge 68, the rail 78 along which the

folding rollers

67a, 67b move is indicated by the winding angle α (e.g., 160 °) of the

folding rollers

67a, 67b with respect to the outer edge 68, and thus the blank 10 having the cut-in line 58 is folded in advance at the preliminary folding stage 38, and the strip-shaped region 24 of the blank 10 is hemmed.

As shown in fig. 1 and 2, the blank 10 having the folded edge is fed out from a feed roller 32 capable of feeding the blank 10 while keeping the folded edge, and is moved to the folding turret 12. The folding turn table 12 is disposed at a final folding position on the conveyance path 26 set downstream of the pre-folding table 38. With blank 10 positioned in the folded position, folding turret 12 folds blank 10 to form outer carton 14, forming the finished package 1.

Specifically, the folding turret 12 is a turret type packaging machine including a turret 80, and intermittently rotates in a circumferential direction indicated by an arrow in fig. 2. A plurality of receiving portions 82 are formed at equal intervals on the outer periphery of the turntable 80. With the intermittent rotation of the turntable 80, each storage portion 82 moves from the entrance 80a of the turntable 80 where the end of the conveying path 26 is located to the exit 80b of the turntable 80 from which the package 1 is fed out.

When one of the storage portions 82 is positioned at the entrance 80a of the turntable 80, the billet 10 is pressed into the storage portion 82 by a push rod, not shown. At this time, the flap portion 22 is partially folded toward the center portion 20 at the cut line 58 formed in the band-shaped region 24 of the blank 10. Then, while the storage section 82 positioned at the entrance 80a of the turntable 80 intermittently moves toward the exit 80b of the turntable 80, the partially formed blank 10 is loaded with an inner package and an inner frame in which cigarettes are placed.

Further, the folding of the blank 10 is performed together with the intermittent movement of the storage section 82. To the blank 10 from the exit 80b, paste is applied to a part of the inside of the flap section 22, and then the flap section 22 is folded and bonded to the central section 20. Thus, the hinge-lid pack 1 of cigarettes as a finished product is finally formed.

As described above, in the present embodiment, the cutting roller 42 constituting the conveying roller 30 has the plurality of blade portions 48 in the pressing region 46 of the outer peripheral surface 42c thereof, and thus, the plurality of cutting lines 58 can be formed on the back side surface 18 of the strip-shaped region 24 of the material 10 corresponding to the corner edge 16 of the outer box 14. In the process of supplying the blank 10 before the packaging of the package 1, since the cut-in line 58 is formed in each blank 10, the blank 10 having a smaller surface area than the raw material web can be processed, and therefore, the band-shaped region 24 of the blank 10 can be reliably thinned, and the bending strength of the band-shaped region 24 can be effectively reduced.

Specifically, it is possible to prevent the outer box 14 from bulging due to the excessively shallow or deep folding lines formed in the blank 10, the separation of the bonded portions of the blank 10 due to the bulging, and the breakage of the adjacent portions of the blank 10, and to improve the quality of the formability including the outer box 14 and the package box 1. Therefore, the folding line of the blank 10 can be reliably formed to a desired depth without depending on the characteristics of the raw material web, and the productivity and quality of the blank 10, the outer box 14, and the package 1 can be easily improved.

Further, the feeding device 8 includes a gap adjusting device 56 for adjusting a gap between the pair of cutting rollers 42 and the receiving roller 44, and thus the depth of the cutting line 58 with respect to the material 10 can be easily adjusted. This can further improve the productivity and quality of the outer box 14 and the package 1.

In addition, the outer side edge 68 of the pre-folding guide 60 has a radius of curvature R that is smaller than the radius of curvature of the rounded edge of the outer box 14. Thus, in the preliminary folding of the blank 10, when the outer box 14 is formed, the blank 10 can be folded in the direction opposite to the direction of the restoring force in consideration of the restoring force to restore the round edge of the outer box 14 to a flat shape. Therefore, the band-shaped region 24 of the blank 10 can be folded more firmly, and the quality of the outer box 14 and the package box 1 can be further improved.

The lower surface 60a of the folding guide 60 is formed with a convex curved surface portion 70 and concave curved surface portions 72, and the blank 10 is superimposed on the corresponding concave curved surface portion 74 and convex curved surface portions 76 on the table 62. This allows the blank 10 to be folded in the direction opposite to the direction of the restoring force of the rounded edge of the outer box 14 without being folded. Further, a smooth rounded edge can be easily formed. Therefore, the band-shaped region 24 of the blank 10 can be folded more firmly, and the quality of the outer box 14 and the package box 1 can be further improved.

The present invention is not limited to the first embodiment described above, and various modifications are possible.

For example, in the present embodiment, the blade 48 is formed in the entire outer peripheral surface 42c along the circumferential direction of the outer peripheral surface 42c in the pressing region 46 of the outer peripheral surface 42c of the cutting roller 42. However, the present invention is not limited to this, and the blade portions 48 may be partially arranged along the circumferential direction of the pressing region 46 of the outer peripheral surface 42c, as shown in fig. 10, for example.

As shown in fig. 11, the concave portion 84 may be partially formed along the circumferential direction of the pressing region 52 of the outer circumferential surface 44c of the receiving roller 44. In the case of fig. 11 and 12, when the material 10 is fed out by the feed roller 30, the intermittent cutting lines 58 can be formed in the band-like region 24 of the material 10 by controlling the rotational position of the cutting roller 42 or the receiving roller 44.

Specifically, as shown in fig. 12, the outer box 14 and the packing box 1 may be formed such that the cut-in line 58 is not formed in the top wall 86 of the lid formed in the outer box 14 and the bottom wall 88 formed in the outer box 14 itself in the band-shaped region 24 of the blank 10. Therefore, the variety of designs of the outer box 14 and the packing box 1 can be greatly increased.

Further, the lengths of the tips of the blades 48 may be partially different in the circumferential direction of the pressing region 52. In this case, the cut lines 58 having different depths may be formed in the band-shaped region 24 of the blank 10. In this case, the strength of the fold in the band-shaped region 24 of the blank 10 can be controlled, and the quality of the outer box 14 and the package 1 can be further improved.

Further, since the cutting roller 42 and the receiving roller 44 are respectively detachable from the roller

main bodies

42a and 44a, the conveying roller 30 in the embodiment shown in fig. 10 and 11 can be easily configured by exchanging the roller

main bodies

42a and 44 a. Further, the blank 10 of fig. 14 and 17 and the outer box 14 of fig. 15 and 18 can be easily changed to those described later.

Specifically, as shown in fig. 13, the blade portion 48 of the cutting roller 42 may have a shape having a tip 48b inclined with respect to the circumferential direction of the outer peripheral surface 42c in the pressing region 46. In this case, as shown in fig. 14, a plurality of cut lines 90 inclined with respect to the longitudinal axis of the blank are formed in the band-shaped region 24 of the blank 10. By selecting the paper quality of the raw material web, as shown in fig. 15, the outer box 14 having a design in which the diagonal pattern 92 is seen through the corner edge 16 which is a round edge can be formed.

As shown in fig. 16, the blade portion 48 may be formed to have a first tip 48c inclined with respect to the circumferential direction of the outer peripheral surface 42c and a second tip 48d intersecting the first tip 48 c. Such a blade portion 48 can be formed by processing the pressing region 46 into a mesh shape by knurling or the like. In this case, as shown in fig. 17, a plurality of cut lines 94 inclined with respect to the longitudinal axis of the blank 10 and a plurality of cut lines 96 intersecting the cut lines 94 are formed in the strip-shaped region 24 of the blank 10. By selecting the paper quality of the raw material web, as shown in fig. 18, the outer box 14 having a design that allows the corner edge 16, which is a rounded edge, to be seen through the mesh pattern 98 can be formed.

Further, as shown in fig. 14 and 15, by forming the cut lines 90, 94, and 96 inclined with respect to the longitudinal axis of the blank 10, even if one blade portion 48 is pressed too deeply into the band-shaped region 24 of the blank 10 for some reason, it is possible to avoid completely cutting at least the portions of the cut lines 90, 94, and 96 adjacent to the blank 10.

In the present embodiment, the cut lines 58, 90, 94, and 96 are formed on the back surface 18 of the band-shaped region 24 of the blank 10, but the cut lines 58, 90, 94, and 96 may be formed in a region other than the band-shaped region 24 of the blank 10 or on the outer surface of the band-shaped region 24. Thus, by applying the present invention, various cut lines can be formed at each portion according to the design required for the outer box 14.

In the present embodiment, the material 10 is arranged and conveyed in the direction in which the longitudinal axis thereof is along the conveyance path 26, but the material 10 may be arranged and conveyed in the direction in which the longitudinal axis is orthogonal to the conveyance path 26. In this case, the cut-in line 58 may be formed at the corner edge between the top wall 86 formed by the lid and the main body of the outer box 14, or the cut-in line 58 may be formed at the corner edge between the main body of the outer box 14 and the bottom wall 88 thereof, which can further increase the design diversity of the outer box 14 and the packing box 1.

The number of the conveying

rollers

28, 30, and 32 and the conveying

trays

34 and 36 described in the present embodiment is not limited to the present embodiment. For example, instead of the

feed trays

34 and 36, only the feed roller 30 having the cutting roller 42 may be disposed in the vicinity of the upstream of the pre-folding table 38.

In the present embodiment, the cut line 58 is formed in the blank 10 for forming the hinge-lid pack 1, but the present invention is not limited to the hinge-lid pack 1, and can be applied to a blank 10 for forming various packs or inner frames of packs.

Fig. 19 is a perspective view showing a state where the lid 100 of the hinge-lid pack 1 is opened. An inner frame 102 is bonded to the outer box 14 of the hinge-lid pack 1. The blank 10 of each of the outer box 14 and the inner frame 102 has different printing states required for the surface of the blank 10 depending on product brands, and the fiber grammage (e.g., 200 to 250g/m2) or the density of the blank 10 has different material characteristics.

For example, in general, a convex portion (not shown) is provided in a part of the inner frame 102, whereby the lid 100 is easily locked to the inner frame 102 and the closing property of the lid 100 is improved. In this case, in order to prevent the lid 100 from being deteriorated in closing property due to the decrease in the convex portion caused by the increase in the number of times of opening and closing the lid 100, the inner frame member 102 may be formed of a high fiber density (for example, 0.8 to 1.0 g/cm)³) A blank 10 of the material of (a). The present invention is applicable not only to the outer box 14 but also to the blank 10 having various material characteristics required for the inner frame 102.

< second embodiment >

The preliminary folding stage provided in the blank supplying apparatus according to the second embodiment will be described below with reference to fig. 20 to 24. Note that, the description is mainly given of the differences from the first embodiment, and the same reference numerals are given to the other elements in the drawings, and the description thereof may be omitted.

As shown in fig. 20, in the pre-folding station 104, the first pressing surface 67a1 of the first folding roller 67a and the second pressing surface 67b1 of the second folding roller 67b have different radii of curvature. Specifically, in the case of the present embodiment, the first folding roller 67a has a circular cross section with a smaller diameter than the second folding roller 67b, and the radius of curvature of the first pressing surface 67a1 is smaller than that of the second pressing surface 67b1, so that the distance between the first pressing surface 67a1 and the outer edge 68 when the pre-folding angle is given is larger than the distance between the second pressing surface 67b1 and the outer edge 68.

In the present embodiment described above, when a blank having a small paper thickness is used, the blank has a small resistance to return to a flat state before folding. Therefore, when the radii of curvature of the first and second pressing surfaces 67a1, 67b1 are made the same by the first and

second folding rollers

67a, 67b having the same diameter as in the first embodiment, as shown in fig. 21, the inner flap 22a located inside the outer box 14 is in a posture of falling too far to the inside of the outer box 14 when the outer box 14 is formed, and the pre-folding angle of the inner flap 22a is too large. In this case, when the outer box 14 is formed, the inner side flap 22a and the outer side flap 22b are separated, and the opposing

flaps

22a and 22b cannot be overlapped and properly joined by paste or the like, and there is a possibility that the outer box 14 and the hinge-lid pack 1 will be defective.

In contrast, in the case of the second embodiment, the first folding roller 67a is formed to have a circular cross section with a smaller diameter than the second folding roller 67b, and the radius of curvature of the first pressing surface 67a1 is reduced as compared with the second pressing surface 67b1, whereby the distance between the first pressing surface 67a1 and the outer edge 68 when the pre-folding angle is given is made larger than the distance between the second pressing surface 67b1 and the outer edge 68. This can reduce the angle of folding in advance with respect to the inner flap 22a, and further reduce the folding of the band-shaped region 24.

Therefore, as shown in fig. 22, when the outer box 14 is formed, the inner flap 22a can be set in an upright posture inside the outer box 14. In this way, in the preliminary folding step of the blank 10, by controlling the inner flap 22a and the outer flap 22b to be different in folding shape, as in the case of the first embodiment, variations in quality of the blank 10 can be suppressed, and productivity and quality of the outer box 14 and the hinge-lid type packing box 1 can be easily improved.

The present invention is not limited to the second embodiment described above, and various modifications are possible.

For example, in the preliminary folding stage 106 shown in fig. 23, the first and

second folding rollers

67a, 67b have the same diameter, but the conveying surface 40 of the preliminary folding guide 60 may be formed such that the width of the outer edge 68 that presses the first outer edge 68a of the first folding roller 67a is smaller than the width of the outer edge 68 that presses the second outer edge 68b of the second folding roller 67 b.

In this case, the distance between the first pressing surface 67a1 and the outer edge 68 when the pre-folding angle is applied is also made larger than the distance between the second pressing surface 67b1 and the outer edge 68. Therefore, the preliminary folding angle of the inner flap 22a is reduced, and the folding edge to the belt-shaped region 24 is weakened, whereby the inner flap 22a can be set in an upright posture inside the outer box 14 when the outer box 14 is formed.

Specifically, the winding angle α of the first folding roller 67a is made smaller than the winding angle α of the second folding roller 67b, so that the preliminary folding angle of the inner flap 22a is made smaller and the folding edge of the band-shaped region 24 is made weaker, whereby the inner flap 22a can be set in an upright posture inside the outer box 14 when the outer box 14 is formed.

In the pre-folding stage 108 shown in fig. 24, two

folding block rows

108A and 108B are provided instead of the two folding roller rows 67a and 67B. Each of the

folding block rows

108A and 108B is composed of, for example, one first folding block (first folding member, folding block) 110a and 3 second folding blocks (second folding member, folding block) 110B.

Each of the

folding blocks

110a and 110b is coupled to a slide mechanism, not shown, so as to be able to advance and retreat. The first folding block 110a is formed by folding the inner flap 22a to give a pre-folding angle to the inner flap 22a, while the second folding block 110b is formed by folding the outer flap 22b to give a pre-folding angle to the outer flap 22 b.

The first and

second folding blocks

110a and 110b have first and second pressing surfaces 110a1 and 110b1 formed on concave surfaces facing the outer edge 68 of the pre-folding guide 60 and pressed against the outer edge 68 via the belt-shaped region 24. The radius of curvature of the first pressing surface 110a1 is larger than that of the second pressing surface 110b 1. Therefore, the preliminary folding angle of the inner flap 22a is reduced, and the folding edge to the belt-shaped region 24 is weakened, whereby the inner flap 22a can be set in an upright posture inside the outer box 14 when the outer box 14 is formed.

By controlling the operation of the slide mechanism, the distance that the first folding block 110a slides toward the outer edge 68 is made smaller than the distance that the second folding block 110b slides toward the outer edge 68, and thus the distance between the first pressing surface 110a1 and the outer edge 68 when the pre-folding angle is applied is made larger than the distance between the second pressing surface 110b1 and the outer edge 68. Therefore, the preliminary folding angle of the inner flap 22a is reduced, and the folding edge to the belt-shaped region 24 is weakened, whereby the inner flap 22a can be set in an upright posture inside the outer box 14 when the outer box 14 is formed.

Finally, the present invention may be established not only by the combination of the first and second embodiments described above but also by the structure of the second embodiment alone. That is, the cut-in line 58 is not formed in the band-shaped region 24 of the blank 10 by the cut-in roller 42, but only by the strength of the folding edge applied to the blank 10 in the above-described preliminary folding stage, variation in quality of the blank 10 can be suppressed, and productivity and quality of the outer box 14 and the hinge-lid pack 1 can be easily improved.

Description of the symbols

1 hinge cover type packing box (packing box)

4 blank box (supply source)

8 supply device

10 blank

12 folding rotary table (packer)

14 outer case

16 corner edge

18 inner side

22 flap portion

22a inner side flap

22b outer side flap

24 band-shaped area

26 conveying path

30 conveying roller (a pair of rollers)

38 pre-folding table

40 conveying surface

42 cutting roller (one side of roller)

42c outer peripheral surface

44 receiving roller (the other side of the roller)

44c outer peripheral surface

46 area of pressure

48 blade

48a along the circumferential end of the outer peripheral surface

48b inclined with respect to the circumferential direction of the outer peripheral surface

48c is inclined with respect to the circumferential direction of the outer peripheral surface

48d second front end crossing the first front end

52 pressing area

56 clearance adjusting device

58 cut-in line

60 Pre-fold guide

64A, 64B folding roller array (folding component)

67a first folding roller (first folding member, folding roller)

67a1 first pressing surface

67b second folding roller (second folding member, folding roller)

67b1 second pressing surface

68 outer edge

70 convex curved surface part

72 concave curved surface portion

78 track

84 recess

90 cut line

94 incision line

96 cut line

108A, 108B folding block column (folding member)

110a first folding block (first folding part, folding block)

110a1 first pressing surface

110b second folding block (second folding part, folding block)

Claims

1. A blank supplying device for supplying a blank forming an outer box of a packing box to a packing machine,

the supply device is provided with:

a conveying path extending from a supply of the blanks to the packaging machine, conveying the blanks one by one along a conveying plane;

a pair of rollers rotatably disposed with the conveying surface therebetween and configured to feed out the billet;

a pre-folding stage which is disposed at a pre-folding position set downstream of the pair of rollers, and which pre-folds a strip-shaped region of the blank corresponding to a corner edge of the outer box when the blank is positioned at the pre-folding position, thereby giving the strip-shaped region an angle of pre-folding without return;

the pre-folding station comprises:

a pre-folding guide which is disposed on the conveyance path, has an outer edge extending along the conveyance path, and overlaps the blank when the blank is positioned at the pre-folding position, and from which a flap portion of the blank including the belt-like region protrudes;

a folding member disposed near the outer side edge of the pre-folding guide, having an axis extending along the outer side edge,

said folding member folding said flap portion while pressing said band-shaped area along said outer side edge, thereby defining said pre-fold angle of said flap portion with respect to said blank,

the flap part includes an inner flap located inside the outer box when the outer box is formed and an outer flap located outside the outer box when the outer box is formed,

said folding member comprising a first folding means to fold said inner side flap and a second folding means to fold said outer side flap,

the first folding member and the second folding member provide the inner flap and the outer flap with different pre-folding angles,

the first folding member and the second folding member have a first pressing surface and a second pressing surface, respectively, which apply the pre-folding angle to the band-shaped region while pressing the band-shaped region along the outer edge,

the distance between the first pressing surface and the outer side edge when the pre-folding angle is given is larger than the distance between the second pressing surface and the outer side edge.

2. The blank supplying apparatus according to claim 1,

the strip-like regions of the blank form rounded edges at the corner edges,

the outer edge has a radius of curvature that is less than a radius of curvature of the rounded edge.

3. The blank supplying apparatus according to claim 2,

the pre-folding guide has a convex curved surface portion projecting toward the opposite side of the folding direction of the flap portion,

in the pre-folded position, the blank is overlapped by the convexly curved face portion.

4. The blank supply apparatus according to claim 3,

the pre-folding guide further includes a concave curved surface portion that is connected to both ends of the convex curved surface portion by a smooth circular arc and is concave in the folding direction of the flap portion, the concave curved surface portion being connected to the outer edge by a smooth circular arc,

in the pre-folded position, the blank is overlapped by the convex curved surface portion and the concave curved surface portion.

5. The blank supplying apparatus according to claim 1,

the outer edges are arranged on both sides of the pre-folding guide to define the width of the conveying surface,

in the pre-folding guide, the conveying surface is formed such that a width of pressing the first outer side edge of the first folding member is smaller than a width of pressing the second outer side edge of the second folding member.

6. The blank supplying apparatus according to claim 1,

the first folding member and the second folding member are folding rollers that move along a rail that surrounds the outside of the outer edge and fold the inner flap and the outer flap while pressing the belt-shaped region along the outer edge.

7. The blank supplying apparatus according to claim 1,

the first folding member and the second folding member are folding blocks that move in a direction that coincides with the outer edge and fold the inner flap and the outer flap while pressing the band-shaped region against the outer edge.

8. The blank supplying apparatus according to claim 1,

a gap adjusting device for adjusting the gap between the pair of rollers to 20-50% of the thickness of the blank,

the pair of rollers has, on the outer peripheral surface thereof, a pressing region for feeding out the blank while pressing a strip region of the blank corresponding to a corner edge of the outer box, and the pressing region has a plurality of blades having a V-shape with acute-angled tips along the circumferential direction, and when the blank passes between the pair of rollers, the blades form a plurality of cut-in lines in the strip region of the blank that reduce the bending strength of the strip region.

9. The blank supply apparatus according to claim 8,

the blade part is locally arranged in the circumferential direction of the pressing area.

10. The blank supply apparatus according to claim 8,

the other of the pair of rollers is provided with a recess locally along the circumferential direction of the pressing region.

11. The billet supply apparatus according to any one of claims 8 to 10,

the pair of rollers forms the cut-in line on the back side of the belt-shaped region of the blank that becomes the inner surface of the outer box.

12. The billet supply apparatus according to any one of claims 8 to 10,

one of the pair of rollers is disposed above the conveying surface.

13. The billet supply apparatus according to any one of claims 8 to 10,

the blade portion is formed to have a leading end in a circumferential direction of the outer peripheral surface in the pressing region.

14. The billet supply apparatus according to any one of claims 8 to 10,

the blade portion is formed to have a leading end inclined with respect to a circumferential direction of the outer peripheral surface in the pressing region.

15. The billet supply apparatus according to any one of claims 8 to 10,

the blade portion is formed to have a first leading end inclined with respect to a circumferential direction of the outer peripheral surface and a second leading end intersecting the first leading end in the pressing region.

16. The blank supply apparatus according to claim 8,

the length of the front end of the blade portion is locally different in the circumferential direction of the pressing region.

17. The billet supply apparatus according to any one of claims 8 to 10,

the long axis of the blank is along the conveying path.

18. The blank supplying apparatus according to claim 1 or 8,

the packing box is a hinge cover type packing box.

19. A method of feeding a sheet material to a packaging machine by using the sheet material feeding apparatus according to any one of claims 1 to 18, wherein the sheet material forming the outer box of the packaging box is fed to the packaging machine,

the feeding method comprises a cutting step of cutting,

conveying the blanks one by one along a conveying surface from a supply source of the blanks to the packaging machine, while pressing a strip-shaped region of the blanks corresponding to a corner edge of the outer box with a roller having a plurality of blade portions with V-shaped edges having acute tip ends in a circumferential direction on an outer circumferential surface, forming a plurality of cut-in lines in the strip-shaped region of the blanks to reduce bending strength of the strip-shaped region,

in the cutting step, the cutting line in the band-shaped region may be adjusted to have a valley shape having an acute angle of a depth in a range of 50% to 80% of the thickness of the material.

20. The blank supplying method according to claim 19,

the feeding method further comprises a pre-folding step of,

when the blank is positioned at a pre-folding position set downstream of the cutting step, the strip-shaped region of the blank is pre-folded, and a pre-folding angle is provided to the strip-shaped region.

21. A method of feeding a blank material to a packaging machine by using the blank material feeding apparatus according to any one of claims 1 to 18, wherein the blank material forming the outer box of the packaging box is fed to the packaging machine,

the feeding method comprises a pre-folding step of,

the blanks are conveyed one by one along a conveying surface from a supply source of the blanks to the packaging machine, and when the blanks are positioned at a pre-folding position, a strip-shaped area of the blanks corresponding to a corner edge of the outer box is pre-folded, and a pre-folding angle is not applied to the strip-shaped area.

22. The blank supplying method according to claim 20 or 21,

in the pre-folding step, when the blank is positioned at the pre-folding position, the blank is overlapped with a pre-folding guide, and a flap portion of the blank including the strip-shaped region is projected from an outer edge of the pre-folding guide, and the flap portion is folded while pressing the strip-shaped region along the outer edge by a folding member disposed in the vicinity of the outer edge of the pre-folding guide.

23. The blank supplying method according to claim 22,

in the pre-folding step, the first folding member and the second folding member provide different pre-folding angles to the inner flap and the outer flap.