JP2000351464A - Package blank feeding method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably deliver and feed package blanks to be fed to a packing machine, from a hopper one by one. SOLUTION: This feeding device for performing a feeding method for package blanks is provided with suction cups 12 and a conveying unit 16 arranged below a hopper 2, the suction cups 12 are elevated to suck and deliver package blanks B one by one from the hopper 2, and the delivered package blank B is delivered to a conveying unit 16 and conveyed toward a packing machine. When the delivering and conveying operation is repeated, a compressive force in the hopper outlet direction is applied to a laminated body of the package blanks B housed in the hopper 2 by a roller 34 to be rotated while being brought into slide-contact with the side surface, and the laminate height is uniformly held. Accordingly, even if deformation such as. warping is generated on individual package blanks B, delivering by the suction cups 12 can be reliably performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package blank which is to be formed as a packaging box and is accommodated in a hopper in a stacked state.
The present invention relates to a method and an apparatus for supplying a package blank which is fed out one by one and supplied to a packaging machine.

[0002]

2. Related Background Art The supply of package blanks of this type is performed one by one in synchronization with the operation cycle of the packaging machine. A continuous feed method disclosed in a gazette is known. In this known continuous feeding method, package blanks are stored in a hopper in a stacked state, and the lowermost package blanks are sucked out from the outlet of the hopper by suction pads and fed out one by one. The blank is delivered to the next transport roller and transported. Here, the suction pad reciprocates between the hopper outlet and the transport roller to enable continuous feeding of the package blank, and the transport roller receives the package blank at regular intervals on its outer peripheral surface. In this way, the continuous conveyance is realized.

[0003]

However, in this type of package blank, for example, a fold line or a flap portion for subsequent fold forming is formed, or only one side is subjected to laminate printing. Sometimes. Therefore, due to its structure, it is difficult for the package blank to keep its shape completely flat against changes in atmosphere such as temperature and humidity.

[0004] For this reason, for example, a rectangular package blank used for packaging (hard box) for cigarette products is liable to be deformed particularly in the longitudinal direction due to a change in temperature or humidity during storage. On the other hand, such package blanks are usually stored in a state in which a certain number of sheets are stacked and banded around the waist, and the deformation of the banded portion is restricted, but the end protruding from the banded portion is not sealed. Since deformation is allowed, this end may be greatly warped upward (curl) during storage.

[0005] Such end warpage occurs uniformly for all of the package blanks stacked in the hopper, so that the end of the lowermost package blank separates significantly upward from the hopper outlet. . In such a situation, when the package blank is fed by the suction pad, the suction pad cannot be completely adhered to the end. In this case, continuous suction of the package blank is hindered by poor suction of the suction pad,
The operation of the entire system from the package blank feeder to the packaging machine is stopped, thereby reducing the operation rate of the entire system.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to make sure that a suction operation is performed by a suction pad regardless of whether or not a package blank is deformed. It is an object of the present invention to provide a method and a device for supplying a package blank which enables continuous supply.

[0007]

According to the method and the apparatus for supplying a package blank of the present invention, the package blanks are vertically stacked and housed in a hopper having a downward hopper outlet. Then, by applying a compressive force in the direction of the hopper outlet to the stack of package blanks, the stacking height from the hopper outlet is kept uniform near the hopper outlet. The package blanks are sucked out one by one from the hopper outlet by the suction pads and fed out, and supplied to the packaging machine through a predetermined transport path.

In the case of the supply device (claim 2), the suction pad is provided below the hopper outlet, and the suction surface thereof is opposed to the hopper outlet. Further, the suction pad is reciprocated between the hopper outlet and the transport path by the pad driving means, and is provided with the suction force at the hopper outlet, while the suction force is released on the transport path. The above-described transport path extends from below the hopper outlet toward the packaging machine, and the package blank is transported through this transport path.

According to the above-described supply method and supply apparatus,
By keeping the stack height of the package blank uniform, the suction pad can completely adhere to the lowermost package blank at the hopper outlet, and the suction force ensures that the package is removed from the hopper outlet. A blank can be paid out. Note that the fed package blank is released from the suction pad and is delivered to the transport path, and thereafter, is transported to the packaging machine.Therefore, by repeatedly feeding the package blank and transporting the same, the package blank is removed. Blanks are continuously supplied to the packaging machine.

In the case of the supply device, a compressing means for applying a compressive force to the laminate in the direction of the outlet of the hopper can be realized by a roller. The roller has a rotation axis along the width direction of the laminate, In addition, the outer peripheral surface slides on the side surface of the laminated body and rotates (claim 3). Such rotation of the roller can apply a compressive force to the laminate without hindering the lowering of the laminate in the hopper due to continuous feeding of the package blank, and the roller can be used to apply the package into the hopper. It does not hinder the blank filling operation.

Further, by changing the rotation speed of the roller (claim 4), the above-mentioned compression force can be adjusted,
Appropriate compression force can be set according to the deformation state of the package blank and the operation speed of the supply device. Preferably, the outer peripheral surface of the roller is knurled (claim 5), and the coefficient of friction between the outer peripheral surface and the side surface of the laminate is appropriately increased.

Further, the above-mentioned roller can be provided with a preferable arrangement according to the shape of the package blank. Specifically, when the packaging box to be molded from the package blank is a hinge lid type pack including a pack body and a box-shaped lid with a self-hinge, an inner front flap portion is particularly included in a portion forming the lid. The outer peripheral surface of the roller is disposed so as to be in contact with the side surface of the laminated body composed of both side edges of the roller. In this case, since the inner front flap portion is located at one end when viewed in the longitudinal direction of the package blank,
The deformation amount is the largest from the relationship with the banding position, and if a compressive force is applied to the laminate at this inner front flap portion, the suction pad can be completely adhered over the entire area in the longitudinal direction of the package blank. it can.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a package blank supply apparatus according to one embodiment is schematically shown. This supply device includes a hopper 2, which has a pair of left and right guide columns 4, 6 as seen in FIG. As is apparent from FIG. 2, the guide columns 4 and 6 are arranged at intervals in the longitudinal direction of the hopper 2, and form a hopper passage inside the hopper 2 in the vertical direction. The hopper 2 has a rectangular support frame 7 at its base.
The guide columns 4 and 6 described above are erected on the support frame 7. The support frame 7 has its lower surface open to form a hopper outlet of the hopper 2 downward,
A plurality of support nails 8, 9, 10 are arranged on the opening edge.

The package blanks B are accommodated in the hopper 2 in a vertically stacked manner, and the lowermost package blank B is supported by the above-mentioned support nails 8, 9, and 10 at the periphery thereof. A pair of left and right remaining detection sensors 11 are attached to the hopper 2, and these sensors 11 can detect that the stack height of the package blank B in the hopper 2 has become below a certain level. it can.

Below the hopper outlet, a plurality of suction cups (suction pads) 12 are arranged upward. As shown in FIG. 2, the suction cups 12 form a line in the front-rear direction of the hopper 2, and each suction cup 12 is attached to a cup holder 14. Further, the transport unit 1 is located below the hopper 2.
The transport unit 16 extends from below the hopper outlet to a packaging machine (not shown). More specifically, the transport unit 16 includes a drive gear pulley 18 and a driven gear pulley 20 at both ends when viewed in the longitudinal direction. These drive and driven gear pulleys 18 and 20 are coaxially separated from each other in the width direction of the transport unit 16. They are arranged in pairs. In addition, endless timing belts 22 with endless teeth are wound around the drive and driven gear pulleys 18 and 20 that are paired with each other in the transport direction. The drive gear pulley 18 is attached to a drive shaft 23, and the drive shaft 23 is connected to a servo motor (not shown).

A number of pushers 24 are mounted on the timing belt 22 around its circumference. The pushers 24 are arranged at regular intervals, and extend between both timing belts 22. I have. Notches (not shown) are formed in the drive and driven gear pulleys 18 and 20 at intervals of the arrangement of the pushers 24 so as to form a clearance.

The transport unit 16 has a transport surface 25 in the same plane as the upper surface of the timing belt 22, and the transport surface 25 extends from below the hopper 2 toward the packaging machine (FIG. 1). 2). The transport unit 16 described above
Can drive the timing belt 22 in the direction of the arrow in the figure by driving the servomotor, and along with the travel, the pusher 24 can be moved along the transport surface 25 in the direction of the packaging machine.

Each of the cup holders 14 is connected to a drive mechanism (pad drive means) (not shown), so that each suction cup 12 can be vertically reciprocated by this drive mechanism. More specifically, the suction cup 12 protrudes into the hopper 2 and is reciprocated between a position where the suction surface is brought into contact with the lower surface of the package blank B at the hopper outlet and a position where the suction cup 12 is drawn below the conveyance surface 25. You. At this retracted position, one suction cup 12 is immersed in the transport unit 16.

Further, each cup holder 14 has a suction passage 26 therein, one end of which is open to the suction surface of each suction cup 12, and the other end of which is a collective suction passage 28 and an electromagnetic control valve 30. Is connected to a negative pressure source (not shown). The electromagnetic control valve 30 controls the supply of suction pressure to each suction cup 12, and can selectively supply either suction pressure or atmospheric pressure to these suction cups 12.

The hopper 2 has a compression unit 32 on the support frame 7 which is located on one guide column 4 side.
The compression unit 32 has a pair of rollers 34 disposed on both sides of the left and right guide columns 4. Referring to FIGS. 3 and 4,
The compression unit 32 is shown in more detail. The compression unit 32 includes a main body bracket 36, which extends on the support frame 7 in the width direction of the hopper 2. The main body bracket 36 has its bottom plate 37 fixed to the support frame 7 via bolts 38.
A front wall 39 extends vertically from one end of the bottom plate 37 along the front surface of the hopper 2.

Each of the above-mentioned rollers 34 is attached to a projecting end of a shaft 40 projecting into the hopper 2 from the front wall 39, and these shafts 40 extend horizontally and parallel to each other through the front wall 39. . More specifically, the front wall 39 has a bearing flange 42 corresponding to each shaft 40.
These bearing flanges 42 are inserted through the front wall 39 with their boss portions facing the hopper 2. Each shaft 40 is rotatably supported by a corresponding bearing flange 42, and driven gears 44, 45 are attached to the other end, respectively.

The compression unit 32 includes an electric motor 46.
The electric motor 46 is attached to the main body bracket 36 via an angled motor bracket 48. The motor bracket 48 is fixed on the bottom plate 37 of the main body bracket 36. A drive gear 52 is attached to the output shaft 50 of the electric motor 46, and the drive gear 52 directly meshes with one of the driven gears 44. The drive gear 52 includes an idle gear 5
The idle gear 54 is meshed with the other driven gear 45. The idle gear 54 is supported by the main body bracket 36 via a bearing bracket 56, and the base end of the bearing bracket 56 is attached to the front wall 39.

The above-described drive gear 52 and idle gear 54
The gear train consisting of the driven gears 44 and 45 is in the same vertical plane, and the driven gears 44 and 45 have a rotation axis in the same horizontal plane as each other. The electric motor 4
The rotation of the drive gear 52 (clockwise direction in FIG. 3) by driving the drive gear 6 causes the driven gear 44 that directly meshes to rotate in the opposite direction, and the other driven gear 45 through the idle gear 54 to the same direction. And the driven gears 4
4, 45 are rotated in opposite directions.

Further, as shown in FIG.
Reference numeral 6 is connected to a speed control unit 58, and its rotation speed can be arbitrarily changed by adjusting a volume not shown. Further, a changeover switch 60 is incorporated in the control system of the electric motor 46, and the rotation of the electric motor 46 can be switched to either automatic or manual (free) by the switching operation.

Here, the package blank B accommodated in the hopper 2 is to be folded and formed, for example, as a hinge lid type pack P for cigarette packaging shown in FIG. 5, and its details are shown in FIG. Have been.
As is well known, the pack P of FIG. 5 has a pack body D capable of accommodating, for example, 20 cigarette products, and the upper end thereof is opened as an outlet for taking out cigarette products. Also,
A lid R is integrally connected to the pack main body D via a self-hinge H at a rear opening edge thereof, and the lid R closes an upper end opening of the pack main body D by rotating around the self-hinge H. be able to. An inner frame F is attached to the inner surface of the pack body D in such a manner that the inner frame F overlaps the inner frame F. When the lid R is closed from the position shown in the figure, the inner frame F, Part.

In the pack P described above, the pack body D and the lid R except for the inner frame F can be formed from the package blank B shown in FIG. Or cut line C
Is attached. The package blank B is, for example, laminated printed with a cigarette brand or the like on one side of the drawing, and is stacked in the hopper 2 with the printed surface facing upward.

The package blank B shown in FIG. 6 has a portion (lid portion) at one end side of which the lid R is to be formed when viewed in the longitudinal direction, and the end portion is formed as an inner front flap IF. I have. When the inner front flap IF is folded as the pack P in FIG. 5, the inner front flap IF is a part that is connected to the front surface of the lid R and is folded inside to form a front opening edge of the lid R. The package blank B is accommodated in the hopper 2 of the supply device such that the edge of the inner front flap IF is guided by the guide column 4.

As shown in FIG. 4, a pair of rollers 34 of the compression unit 32
Is stored in the hopper 2, the outer peripheral surface thereof is in contact with both side edges of the inner front flap IF portion. The rotation axes of these rollers 34 are parallel and horizontal to each other, and are arranged in the same direction as the longitudinal direction of the package blank B in the hopper 2.

FIG. 7 shows the positional relationship between the stacked body of the package blank B and the rollers 34 more specifically. When the electric motor 46 is driven in this state, the pair of rollers 34 As a result of the rotation in the opposite direction, each of the rollers 34 rotates while sliding on the side surface of the stacked body of the package blank B. At this time, the pair of rollers 34
Rotate in a direction to move the outer peripheral surfaces facing each other downward, that is, in a direction to move in the direction of the hopper outlet. Energize. On the other hand, since the lowermost package blank B in the hopper 2 is supported by the above-described support nails 8, 9, and 10, the lowermost package blank B is moved from the contact area with the roller 34.
A compressive force in the direction of the hopper outlet is applied to the laminated body at the position of the inner front flap IF as shown in the figure (compressing means).

If the outer peripheral surface of the roller 34 is subjected to, for example, knurling, the friction coefficient between the roller and the laminated body can be appropriately increased, and the above-described compressive force can be satisfactorily applied. Next, a method of supplying a package blank by the above-described supply device will be described with reference to FIGS. In addition, the following description also clarifies the operation timing of the driving mechanism and the transport unit 16 described above.

As shown in FIG. 8, the package blank B for the hinge-lid type pack is usually stored in a state of being stacked up and down with its waist bound by a band seal T. When the package blank B is used, the above-mentioned inner front flap is particularly used. Deformation (curl) often occurs in a state where the IF portion is largely warped upward. When the package blank B thus deformed is stored in the hopper 2 as it is, as shown in FIG. 9, the support nail 8 is held in a state where the inner front flap IF portion is uniformly warped up.
Therefore, the lowermost package blank B is partially peeled off from the hopper outlet of the hopper 2.

As shown in FIG. 9, the suction cup 12 is on standby at a retracted position below the transfer surface 25 of the transfer unit 16, and the transfer unit 16 also stops operating. In such a state, when the electric motor 46 of the compression unit 32 is driven to rotate the pair of rollers 34, the stacked body of the package blank B applies a compressive force to the inner front flap IF as described above. . At this time, the lower package blank B from the contact area with the roller 34 is kept flat in its shape, so that the laminate is uniformly kept at the lamination height h from the hopper outlet as shown in FIG. You.
Note that the stack height h, the region package blank B during storage has been bundling, that is, the height h ₀ substantially the same laminate at that deformation hardly seen region (see FIG. 7). Further, as is apparent from FIG. 10, at this time, the peeling of the lowermost package blank B from the hopper outlet is eliminated.

In this state, the above-described drive mechanism moves the suction cup 12 to its raised position and drives the electromagnetic control valve 30 to supply suction pressure into the collective suction passage 28 (see FIG. 10). Thus, each suction cup 12 is provided with a suction force, and suctions the lowermost package blank B on its suction surface. At this time, since the lowermost package blank B is held in a flat shape, all the suction cups 12 can be completely adhered to the lower surface thereof, and the suction force can be sufficiently exerted.

With the package blanks B sucked as described above, the drive mechanism lowers the suction cup 12 as shown in FIG. 11 and draws out the lowermost package blank B from the hopper outlet. Further, when the package blank B delivered by the lowering of the suction cup 12 reaches the conveying surface 25, the drive mechanism operates the electromagnetic control valve 3.
By switching 0, the collective suction passage 28 is communicated with the atmosphere, and the supply of the suction pressure is released.

At this time, the sucked-out package blank B is released from suction by the suction cup 12 and delivered to the transport surface 25. At this time, the transport unit 16 has stopped moving the pusher 24 and receives the package blank B between the pushers 24 adjacent to each other with the hopper 2 interposed therebetween. In addition, the above-described pusher 24
The interval between them has a span enough to receive the package blank B in the width direction, and the transport unit 16
Stops the pusher 24 so as to position the hopper outlet between the pushers 24.

Thereafter, as shown in FIG. 12, the suction cup 12 descends to its retracted position and waits for the next ascending timing. On the other hand, when the package blank B is delivered on the transport surface 25 as described above, the transport unit 16 moves the pusher 24 by one span, and transports the received package blank B toward the packaging machine.

Thereafter, the pair of rollers 34, the driving mechanism, and the transport unit 16 repeat the above-described operation, whereby the package blanks B are repeatedly fed out one by one from the hopper 2, and the fed package blanks B are fed out. Are supplied to the packaging machine one by one by the transport unit 16 (see FIG. 1). In the method for supplying a package blank using the supply device of the above-described embodiment, when the suction cup 12 is brought into close contact with the package blank B, there is no fear of poor suction due to warpage (curling) of the package blank B. That is, as shown in FIG. 9, when the suction cup 12 is lifted as it is in a state where the lowermost package blank B is partially peeled off from the hopper outlet, the lower surface of the package blank B and its inner front flap IF portion A gap is formed between the suction surface of the corresponding one suction cup 12 and the secondary air is introduced into the collective suction passage 28 through the gap. For this reason, even if the suction surface can be completely fitted with another suction cup 12, the suction force is reduced, resulting in poor suction.

Further, when the remaining amount of the package blank B in the hopper 2 becomes small, the pushing force of the package blank B against the laminate by the rising operation of the suction cup 12 becomes relatively large, and this pushing force is increased. May overcome overall body load. In this case, the package blank B is pushed up (fluttered) into the hopper 2 by the suction cup 12, and this pushing up may cause a suction failure.

On the other hand, the compression unit 32 of this embodiment
Is applied, and a compressive force is applied to the stacked body of the package blank B by the pair of rollers 34, the gap described above is eliminated, and the package blank B is removed from the suction cup 1
2, the suction operation can be completely performed, and the feeding operation can be ensured. Further, even if the remaining amount of the package blank B is relatively small, the stacked body is not covered with the roller 3.
4, the lowermost package blank B can be reliably sucked without being pushed up from the suction cup 12 without being pushed up by the suction cup 12.

Therefore, in any case, the fed package blank B is continuously and stably supplied to the packaging machine.
Significantly improve the operation rate of the entire system from the supply device to the packaging machine. According to the test results by the inventors of the present invention, in the supply of the package blank using the supply device of the above-described embodiment, the number of times the statistical system was stopped was reduced to one third or less of the conventional system It has been confirmed that it can be drastically reduced to the level of.

In the supply apparatus of the embodiment, the compression force of the roller 34 can be adjusted by varying the rotation speed of the electric motor 46 by the speed control unit 58 described above.
The size can be adjusted as appropriate according to the deformation state of. When the hopper 2 is filled with the package blank B, the changeover switch 60 described above
By switching the rotation of 4 to manual, the filling operation can be easily performed.

On the other hand, the package blank B in the hopper 2
If a compressive force is applied to the stacked body by the rollers 34 sliding on the side surfaces thereof, the rotation of the rollers 34 prevents the stacked body from lowering due to the feeding of the package blank B and prevents the hopper 2 from being refilled. And never. The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, instead of the transport unit 16 in the embodiment, a belt conveyor type or roller type transport unit may be used.

In addition, the portion for applying the compressive force to the laminated body of the package blank B is not only the inner front flap IF portion, but also other portions of the warped region shown in FIG. Or other protruding regions or banding regions. In addition, it goes without saying that the present invention can be applied not only to package blanks for hinge lid type packs but also to supply various package blanks.

[0044]

As described above, the method and the apparatus for supplying a package blank according to the present invention.
According to 2), when the lowermost package blank is sucked and fed from the hopper outlet, suction failure due to the suction pad does not occur, and reliable feeding and supply can be performed.

Further, since the supply device applies a compressive force to the laminate by the rotation of the roller (claim 3), the continuous feeding and supply operation of the package blank can be easily realized, and the operability of the device is greatly improved. improves. Furthermore, if the rotation speed of the roller is variable (claim 4), it can cope with a wide range of operating conditions, and its practicality is enhanced. Further, the roller whose outer peripheral surface is knurled (claim 5) can apply a compressive force to the laminated body stably.

Further, with regard to the package blank of the hinge lid type pack, it is possible to easily achieve reliable feeding and supply of the package blank by arranging the roller particularly at the portion where the deformation is large.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a package blank supply device.

FIG. 2 is a left side view showing a schematic configuration of a package blank supply device.

FIG. 3 is a front view showing a compression unit partially broken away.

FIG. 4 is a cross-sectional view of the compression unit taken along the line IV-IV in FIG.

FIG. 5 is a perspective view of a hinge lid type pack formed from a package blank.

FIG. 6 is a plan view showing a package blank in detail.

FIG. 7 is a perspective view showing an arrangement of rollers on a stacked body of package blanks.

FIG. 8 is a perspective view for explaining a storage state of a package blank.

FIG. 9 is a schematic diagram showing a state when a package blank is stored in a hopper.

FIG. 10 is a view showing a state where the roller is rotated from the state of FIG. 9 and the lowermost package blank is sucked by the suction cup;

FIG. 11 is a view showing a state in which a package blank is fed out by a suction cup.

FIG. 12 is a diagram illustrating a state in which the fed-out package blank is delivered on a transport surface.

[Explanation of symbols]

 2 Hopper 7 Support frame 8, 9, 10 Support nail 12 Suction cup (suction pad) 16 Transport unit (transport means) 25 Transport surface (transport path) 26, 28 Suction passage 30 Electromagnetic control valve 32 Compression unit (compression means) 34 Roller 46 Electric motor 58 Speed control unit (variable means) B Package blank P Hinge lid type pack D Pack body R Lid IF Inner front flap

Claims (6)

[Claims] 1. A package blank processed to be folded and formed as a packaging box is vertically stacked and accommodated in a hopper having a downward hopper outlet, and one package blank is received from the hopper outlet. In a method of supplying a package blank to be supplied to a packaging machine through a predetermined supply path while being sucked and fed out by a suction pad at a time, the stack of package blanks housed in the hopper is provided with a hopper near a hopper outlet. A method for supplying a package blank, comprising applying a compressive force in the direction of the hopper outlet so as to maintain a uniform stacking height from the outlet. 2. An apparatus for supplying a package blank processed to be folded and formed as a packaging box to a packaging machine, comprising: a hopper outlet having a downward opening, wherein the package blanks are vertically stacked. A hopper for accommodating the body in a state supported by an edge of the hopper outlet, and a conveying means extending from below the hopper outlet toward the packaging machine, and conveying the package blank through the conveying path. And a suction pad arranged below the hopper outlet and having a suction surface facing the hopper outlet, and reciprocating the suction pad between the hopper outlet and the transport path, and A pad driving means for applying a suction force to the suction pad to release the suction force in the transport path; Compression means for applying a compressive force in the direction of the hopper outlet in order to keep the stacking height from the hopper outlet uniform in the vicinity of the hopper outlet, to the stacked body of the package blanks thus obtained. Package blank supply device. 3. The compacting device according to claim 1, wherein the compressing means includes a roller having a rotation axis along a width direction of the stacked body of the package blank, and having an outer peripheral surface rotating in sliding contact with a side surface of the stacked body. The apparatus for supplying a package blank according to claim 2. 4. The apparatus according to claim 3, wherein said compression means further includes a variable means for varying a rotation speed of said roller.
A package blank supply device according to claim 1. 5. The apparatus according to claim 3, wherein the outer peripheral surface of the roller is knurled. 6. The package box to be molded from the package blank, the pack body having one end opened, and the pack body being rotatably connected to a rear opening edge of the pack body via a self-hinge. And a box-shaped lid that covers the open end of the package body and closes the pack body.The side of the stacked body that is in contact with the outer peripheral surface of the roller is such that the package blank serves as the hinge-lid pack. 4. The molded product according to claim 3, wherein the inner front flap portion is formed at both sides of an inner front flap portion which, when formed, is continuous with the front surface of the lid and is turned back inside the lid so as to form a front opening edge of the lid. 6. The apparatus for supplying a package blank according to any one of claims 1 to 5.