RU2672343C2 - Device for supplying blanks and method for supplying blanks therewith - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: device contains a line for transporting blanks one by one along the transport surface and a pair of rollers arranged for rotation on opposite sides of the transport surface and provided with pressure areas on the outer peripheral surfaces to feed the blank and simultaneously press the strip-like area of the blank corresponding to the straight edge of the box. One of the pair of rollers has a large number of blades in the pressure area of the roller, and when the blank passes between the rollers, the blades form a large number of cutting lines in the strip-like area of the blank to reduce its bending strength. Device also contains a device for regulating the gap between the rollers and controlling the position of rotation of one or the other roller. Invention is also another embodiment of the device and options for methods of supplying blanks, carried out by devices for feeding blanks.

EFFECT: group of inventions provides improved quality and performance.

28 cl, 24 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a preform supply device and a preform supply method using a preform supply device and, more particularly, to a preform supply device used to form packaging boxes, such as hinged-lid cigarettes, onto a packaging machine, and to a method for feeding preforms using a feeder.

State of the art

Patent Publication 1 proposes a device for producing packaging for printing on a web of material in accordance with a packaging design, cutting a blank from a web of material, and stamping and embossing on the blank.

Prior Art Document

Patent document

Patent Publication 1: Brochure of International Publication WO 2013/037463

SUMMARY OF THE INVENTION

Problems to be Solved by the Present Invention

Some packaging boxes are designed so that straight edges along the longitudinal direction of the boxes are formed as rounded edges. To make such a box, you need to create fold lines in the areas of the rounded edges of the workpiece used to form the box and perform pre-processing during formation.

Typically, the processing of the unfolded blank before folding is assigned to a printer that prints on the blank. In particular, the printer prints on a web of material before the web of material is divided into separate blanks and, for example, stamping based on a press using a press plate is performed. In this case, the folding lines described above are also formed in the form of lines for extruding the relief at the same time by embossing, and at the same time, the material web is cut into individual blanks.

Currently, packaging boxes require designs with various options, often requiring complex geometry for stamping sections and fold lines. When the geometry of the fold lines changes, it is necessary to prepare press plates for different geometries, which leads to an increase in manufacturing costs. In addition, in order to reliably form bending lines on the workpiece as compared to the case when only stamping sections are formed on the workpiece, slight adjustment of the pressing pressure on the press plate is necessary, and the entire press plate must be pressed evenly. If the pressing force of the press plate is insufficient or not uniform, the fold lines formed on the workpiece may be too shallow or too deep. Such a problem with fold lines also depends on the bulk and density of the web of material used for the workpiece.

If the folding lines formed on the workpiece are too small, the recoil force (elastic force) of the workpiece, which tends to return to a flat state before bending, increases, and thus, the rounded edges are difficult to form during folding of the box on the packaging machine. Consequently, the box may unintentionally swell, which ultimately leads to the adhesive sections being disconnected from each other due to expansion and damage to the box and thus the packaging.

On the other hand, when the fold lines formed on the workpiece are too deep, the press plate will cut excessively into the web of material, making it difficult to separate the press plate from the web of material. In addition, adjacent sections in the workpiece can be separated by a fold line, which can lead to damage to the workpiece.

In addition, during pre-preparation during the formation of the packaging box, in addition to creating fold lines on the workpiece, by pre-folding the workpiece, a pre-folding step can be performed to give the workpiece a folded geometry.

At this stage of pre-folding, the recoil force of the workpiece, which tends to return to a flat state before bending, is small, especially when a workpiece with a small paper thickness is used. Therefore, in the case of an internal valve, in which the bending location of the workpiece is on the inside of the box, the inside valve assumes a position where it is strongly inclined to the inside of the box. This causes the internal valve to be spaced apart from the external valve located outside the box during the formation of the box, which makes it impossible to overlap and correctly attach the opposite valves by gluing or the like, which can damage the box and thus the packaging.

The present invention is directed to solving this problem, and the aim of the invention is to provide a workpiece feed device and a workpiece feed method using a workpiece feed device, the device and method allowing to adjust the folding geometry of the workpiece, thereby reducing the change in the quality of the workpiece and easily increasing productivity and quality of the box and thus packaging.

Problem Solver

In order to achieve the above objective, one aspect of the present invention is directed to providing a preform feeding device for supplying a preform used to form a packaging box to a packaging machine, the feeding device comprises: a conveyance line for transporting preforms one at a time along a transport surface that extends over from the feed source to the packaging machine; and a pair of rollers arranged to rotate on opposite sides of the transport surface and provided with a clamping region on the outer peripheral surface for supplying the workpiece, while pressing the strip-like region of the workpiece corresponding to the straight edge of the box, one of the two rollers having a large number of blades in the clamping region, and when the workpiece passes between a pair of rollers, the blades form a large number of cut lines in the strip-like region of the workpiece to reduce bending strength olosoobraznoy area.

On the other hand, the method for feeding blanks of the present invention is a method for feeding a blank used to form a packaging box to a packaging machine, the method includes a cutting step in which a large number of cutting lines are formed in the strip-like region of the workpiece to reduce the flexural strength of the strip-like areas by transporting the blanks one at a time along the transport surface from the supply source of blanks to the packaging machine, while pressing the strip-like region be blank corresponding straight edge of the box.

Advantages of the Present Invention

According to the present invention, the workpiece feeding device and the workpiece feeding method using the workpiece feeding device make it possible to adjust the folding geometry of the workpiece and easily increase the productivity and quality of the workpiece, box, and thus packaging.

Brief Description of the Drawings

FIG. 1 is a side view of a packer with a hinged lid equipped with a workpiece feed device according to a first embodiment of the present invention.

Figure 2 shows a plan view of the machine for the manufacture of figure 1.

FIG. 3 is a perspective view showing a packaging box with a hinged lid of FIG. 1.

Figure 4 shows a plan view of the unfolded, unfolded workpiece used to form the box of figure 3, when viewed from the side of the rear surface, which should become the inner surface of the box.

Figure 5 shows a front view of the transport rollers of figure 1 when viewed from the side of the pre-bending station.

Figure 6 shows a plan view of the workpiece that has passed the transport rollers of figure 5, when viewed from the rear surface.

FIG. 7 shows an enlarged sectional view of a portion of the blank of FIG. 6 with cut lines formed in it.

On Fig shows a front view of the pre-bending station of figure 1 when viewed from the side of the bending turret.

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

10 is a front view illustrating an embodiment of the cutting roller of FIG. 5.

11 is a front view illustrating an embodiment of the guide roller of FIG. 5.

FIG. 12 shows a plan view of a workpiece that can be formed using the roller of FIG. 10 or 11.

13 is a front view illustrating another embodiment of the cutting roller of FIG. 5.

On Fig shows a plan view of the workpiece, which can be formed using the cutting roller of Fig.13.

FIG. 15 is a perspective view illustrating a box of the formed blank of FIG. 14.

16 is a front view illustrating another embodiment of the cutting roller of FIG. 5.

On Fig shows a plan view of the workpiece, which can be formed using the cutting roller of Fig.16.

Fig. 18 is a perspective view illustrating a box of the formed blank of Fig. 17.

19 is a perspective view illustrating a package with a hinged lid with an open lid.

FIG. 20 is a plan view of a pre-bending station provided on a workpiece feed device according to a second embodiment of the present invention.

On Fig shows a view in section of a box formed from a thin preform uniformly subjected to preliminary bending.

FIG. 22 is a sectional view of a box formed from a thin preform subjected to pre-folding at the pre-folding station of FIG. 20.

FIG. 23 is a plan view of a pre-folding station, which is one embodiment of FIG.

FIG. 24 is a plan view of a pre-folding station, which is another embodiment of FIG.

Descriptions of Embodiments of the Present Invention

Embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>

Figure 1 shows a side view of the machine 2 for the manufacture of a package 1 with a hinge cover (hereinafter referred to simply as the package 1), the machine 2 for manufacture is provided with a feeder for the blanks according to the first embodiment of the present invention, and figure 2 shows a view in plan machine 2 for manufacturing. The manufacturing machine 2 comprises a blank blanket 4 (supply source), an intake 6, a blank blanking device 8, a turret 12 (packaging machine) for blanks 10 and the like.

3 is a perspective view illustrating a box 14 of a package 1 of the present embodiment. Four straight edges 16 of the box 14 along the longitudinal direction of the box are formed as rounded edges, and in the present embodiment, each of the straight edges 16 is made of a series of gradually inclined planes.

FIG. 4 is a plan view of an unbent, unfolded blank 10 used to form the box 14 of FIG. 3, when viewed from the side of the rear surface 18, which should become the inner surface of the box 14.

The preform 10 mainly comprises a central section 20 in the center and two valve sections 22 formed on opposite sides of the central section 20. Each valve section 22 is made of a group of internal valves 22a located longitudinally in the center of the preform 10 and placed inside the box 14 in the formation time of the box 14, a group of external valves 22b located at opposite ends of the workpiece 10 in the longitudinal direction and positioned outside the box 13 during the formation of the box 14.

An adhesive surface 22a1 on which adhesive or the like is applied is formed on each inner valve 22a, as shown in FIG. 4, and the inner and outer valves 22a and 22b, which are opposed to each other, are glued together by adhesive surfaces 22a1 during formation boxes 14. In addition, the blank 10 is formed with strip-like regions 24 corresponding to the straight edges 16 of box 14. Strip-shaped regions 24 are formed in two places on top of the center section 20 and two sections 2 2 valves extending parallel to the longitudinal axis of the workpiece 10 along the conveyance line 26 (see FIGS. 1 and 2) provided on the supply device 8.

As shown in FIGS. 1 and 2, several individual blanks 10 shown in FIG. 4 are stacked in a stack of 4 blanks in a magazine. The blanks 10 are drawn in one from the bottom from the store 4 blanks by means of the intake 6 and are output sequentially to the device 8 feed.

The feed device 8 includes a conveyance line 26, conveyor rollers 28, 30 and 32, transfer discs 34 and 36, a pre-folding station 38 and the like.

Transport lines 26 extend from the blanket store 4 to the pre-folding station 38 and, ultimately, to the bending turret 12 and transfer blanks 10 one by one along the transport surface 40 of the transport lines 26 by means of transport rollers 28 and 30 and transfer discs 34 and 36. The transport rollers 28 and 30 and the transfer discs 34 and 36 are arranged at appropriate intervals so that they can transfer the workpiece 10, elongated from the store 4 blanks, to the transport line 26 and, ultimately, to the bending turret 12, one at a time.

The transport rollers 28 consist of two rollers 28a and 28b rotatably located on opposite sides of the transport surface 40. When the workpiece 10 passes between the rollers 28a and 28b, a pair of rollers 28a and 28b passes the workpiece 10 between them, while rotating on one and the same the same peripheral speed and transporting the workpiece 10, feeding them one at a time along the line 26 of transportation. The transport rollers 30 feed and transfer the workpiece 10 similarly to the transfer rollers 28.

The transfer discs 34 and 36 are rotatably disposed on the upper side of the transport surface 40, and as the workpiece 10 passes under the transfer disks 34 and 36, the transfer disks 34 and 36 transfer the workpiece 10 by pushing the workpiece 10 forward onto the conveyance line 26.

Figure 5 shows a front view of the transport rollers 30 when viewed from the side of the station 38 pre-bending. The transport rollers 30 are located directly in the process before the pre-bending station 38 and consist of a cutting roller 42 located on the upper side of the transport surface 40 and a guide roller 44 located under the transport surface 40.

The cutting roller 42 is provided with a drive shaft 42b designed to drive the rotation of the main body 42a of the roller in the direction of the arrow. On the main part 42a of the roller, i.e., the outer peripheral surface 42c of the cutting roller 42, strip-shaped pressing regions 46 are formed, respectively, in positions corresponding to the above-mentioned strip-like regions 24 of the workpiece 10. In the pressing regions 46, a large number of blades 48 are formed around the outer peripheral surface 42c. Each blade 48 has a tip 48a along the peripheral direction of the outer peripheral surface 42c, the tip 48a of the blade 48 is machined to be wedge-shaped, and the blades 48 have substantially the same length of the tips. In addition, the main part 42a of the roller and the drive shaft 42b are detachably connected to each other by a bolt 50.

On the other hand, the guide roller 44 is provided with a drive shaft 44b for rotating the main body 44a of the roller in an arrow direction. On the roller main body 44a, i.e., the outer peripheral surface 44c of the guide roller 44, the strip-like pressing regions 52 are formed flat, respectively, in positions corresponding to the regions 24 of the workpiece 10. Furthermore, the roller main body 44a and the drive shaft 44b are detachably connected to each other with a bolt 54.

Blades 48 formed in the pressing regions 46 on the outer peripheral surface 42c of the cutting roller 42 protrude to the pressing regions 52 on the outer peripheral surface 44c of the guide roller 44 with a predetermined clearance G provided therebetween. The drive shaft 42b of the cutting roller 42 and the drive shaft 44b of the guide roller 44 are connected to the clearance adjusting device 56. The clearance adjusting device 56 is for adjusting the clearance G between the cutting roller 42 and the guide roller 44 by moving the drive shafts 42b and 44b up and down.

6 shows a plan view of the workpiece 10 that has passed the transport rollers, viewed from the side of the rear surface 18. When the workpiece 10 passes between the pair of cutting roller 42 and the guide roller 44, the workpiece 10 is fed by pressing the strip-like areas 24 of the workpiece 10 to the pressure regions 46 of the cutting roller 42 and pressure regions 52 of the guide roller 44. In this case, the blades 48 cut into the rear surfaces 18 of the strip-like regions 24 to a predetermined depth along the thickness of the workpiece 10 and, thereby, form a large number of lines 58 the cut in the rear surfaces 18. The cut lines 58 extend parallel to the longitudinal axis of the workpiece 10, thereby reducing the thickness of the strip-like regions 24 of the workpiece 10 and thereby reducing the flexural strength of the strip-like regions 24. In addition, the gap G between the pair of cutting roller 42 and the guide roller 44 is set in accordance with the depth of the cut lines 58 of the desired workpiece 10.

Fig. 7 shows an enlarged sectional view of a portion of a workpiece 10 with cut lines 58 formed therein. The gap G between the pair of cutting roller 42 and the guide roller 44 is set in the range from, for example, 20 to 50% of the thickness T (for example, from 0.25 to 0.35 mm) of the workpiece 10. In this case, as shown in Fig.7 , a large number of cut lines 58 of a given depth D in the range from, for example, 50 to 80% of the thickness T of the workpiece 10 will be formed in the workpiece 10 and will have a shape, for example, resembling the shape of an acute-angled depression (in the form of a wedge).

As shown in FIGS. 1 and 2, the pre-folding station 38 is located in the pre-folding position on the conveyance line 26, the pre-folding position being set immediately along the method after the transport rollers 30, i.e., the pair of the cutting roller 42 and the guide roller 44 When the preform 10 is located in the pre-folding position, the pre-folding station 38 pre-bends the strip-like regions 24 of the preform 10 and sets them to a bend shape corresponding to rounded m the edges of the box 14 and, more specifically, the angles of pre-folding for the strip-like areas 24, as shown in figure 3.

Fig. 8 is a front view of the pre-folding station 38 seen from the side of the bending turret 12, and Fig. 9 is a top view of the pre-folding station 38. The pre-folding station 38 includes a pre-folding guide 60, a table 62, two bending roller devices 64A and 64B (bending elements), a lift 66 and the like.

The pre-bending guide 60 is located on the table 62 with the workpiece 10 embedded in it.

The pre-folding guide 60 is shaped to a plate that has side edges 68 near the opposite ends of the table 62. The side edges 68 extend along the transport lines 26, have an arched shape corresponding to the rounded edges of the box 14, and set the width of the transport surface 40 when they are opposite sides of the pre-bend guide 60. The lateral edges 68 are shaped so that they have a radius of curvature R (e.g., 2.5 mm) smaller than the radius of curvature (e.g., 4 mm) of the rounded edges.

When the preform 10 is folded under the pre-folding guide 60, the preform 10 is snug against the lower surface 60a of the pre-folding guide 60. On the lower surface 60a of the pre-folding guide 60, a portion 70 of a convex curved surface is formed in the center in the section of the pre-folding guide 60, protruding downward, i.e., protruding in a direction opposite to the bending direction of the valve sections 22.

In addition, portions 72 of the concave curved surface, up-pressed, i.e., depressed in the bending direction of the valve sections 22, are formed on the lower surface 60a of the pre-bending guide 60, which are respectively connected to the opposite ends of the convex curved surface portion 70 by smooth arcs. Through smooth arcs, sections 72 of a concave curved surface are respectively attached to side edges 68 located in close proximity.

The stage 62 forms a conveyance line 26, and when the preform 10 is folded under the pre-bending guide 60, the preform 10 is firmly adjacent to the upper part 62a of the stage 62, which serves as the transport surface 40 of the conveyance lines 26.

The upper part 62a of the table 62 is formed to form a concave curved surface portion 74 and a convex curved surface portions corresponding to, respectively, a convex curved surface portion 70 and a concave curved surface portions 72 formed on the lower surface 60a of the pre-folding guide 60. That is, the upper portion 62a of the table 62 has a geometry complementary to the lower surface 60a of the pre-folding guide 60. Further, in the pre-folding position, the central section 20 of the workpiece 10 is compressed when it is inserted between the convexly curved surface portion 70 and the pre-curved surface portions 72 of the concave curved surface and the pre-curved surface portion 74 and the curved surface portions 76 and the curved surface of the table 62.

The bending roller devices 64A and 64B are located near the opposite ends of the side edges 68 of the pre-bending guide 60 and are provided with respective shafts 65A and 65B extending along the side edges 68. For example, one first bending roller (first bending element or first bending roller) 67a and three second bending rollers (second bending elements or second bending rollers) 67b are rotatably held on each of the shafts 65A and 65B.

The first bending roller 67a sets the pre-bending angle of the inner valves 22a by bending the inner valves 22a, while, on the other hand, the second bending rollers 67b sets the pre-bending angle of the outer valves 22b by bending the outer valves 22b. On the respective outer peripheral surfaces, the first and second bending rollers 67a and 67b form the first and second pressing surfaces 67a1 and 67b1 pressed against the side edges 68 by means of strip-like regions 24.

According to the present embodiment, the first and second bending rollers 67a and 67b have a circular cross section of the same diameter, the first and second clamping surfaces 67a1 and 67b1 have the same radius of curvature, and when the pre-bending angle is reached, the distance between the first clamping surface 67a1 and the side edge 68 is equal to the distance between the second clamping surface 67b1 and the side edge 68.

The bending roller devices 64A and 64B are rotatably connected to the lever system of the lift 66, and when the lift 66 is turned on, the bending rollers 67a and 67b move along the paths 78 shown in FIG. 8, through a system of levers.

In particular, when the preform 10 is located in the pre-folding position, the first preform 10 located on the stage 62 is folded under the pre-folding guide 60, while at the same time the valve sections 22 containing the strip-like regions 24 of the preform 10 protrude from the side edges 68.

Further, as the elevator 66 acts, the bending rollers 67a and 67b move along the arcuate paths 78 around the outer sides of the side edges 68 located in the vicinity of the bending rollers 67a and 67b, and bend the valve sections 22 while pressing the strip-like regions 24 of the workpiece 10 along side edges 68. The path along which the bending rollers 67a and 67b move is represented by the contact angle α (for example, 160 degrees) of the bending roller 67a or 67b with respect to the side edge 68. Thus, the workpiece 10 with pre-cut lines 58 ritelno folded at the station 38 prefolding, the fold forming the strip areas 24 the workpiece 10.

As shown in figures 1 and 2, the billet 10 with bends is fed from the transport rollers 32, capable of transferring the billet 10 by holding the folds, and is transmitted to the bending turret 12. The bending turret 12 is located in the position of the main bend on the transport line 26, where the position of the main bend is set in the course of the method after the station 38 pre-bending. When the workpiece 10 is located in the position of the main folding, the bending turret 12 forms a box 14 by folding the workpiece 10 and forms the finished package 1.

In particular, the bending turret 12 is a turret-type packaging machine equipped with a turret 80 and rotates intermittently in the circumferential direction indicated by the arrow in FIG. 2. Several pockets 82 are formed at equal intervals in the outer peripheral portion of the turret 80. Simultaneously with the intermittent rotation of the turret 80, each pocket 82 moves from the inlet 80a of the turret 80, in which the end of the transfer line 26 is located, to the outlet 80b of the turret 80 from which the packages come out 1.

When one pocket 82 is located at the inlet 80a of the turret 80, the workpiece 10 is pushed into the pocket 82 by means of a pusher not shown. In this case, the valve sections 22 are partially bent to the central sections 20 along the cut lines 58 formed in the strip-like regions 24 of the workpiece 10. Further, in the method in which the pocket 82 located at the inlet 80a of the turret 80 moves intermittently to the outlet 80b of the turret heads 80, an inner pack containing cigarettes, and an inner frame are inserted into the blank 10 partially formed.

In addition, simultaneously with intermittent movement of the pocket 82, the workpiece 10 is bent. When the preform 10 exits the outlet 80b, glue is applied to part of the valve sections 22, and then the valve sections 22 are folded and glued to the central section 20. Then, finally, the cigarette pack 1 with a hinged lid is formed into a finished product.

Thus, in the present embodiment, since the cutting roller 42 of the transporting rollers 30 has a large number of blades 48 in the pressing regions 46 on the outer peripheral surface 42c of the cutting roller 42, a large number of cut lines 58 can be formed in the rear surfaces 18 of the strip-shaped regions 24 of the workpiece 10 corresponding to the straight edges 16 of the box 14. Since the workpiece 10, smaller in surface area than the canvas material, can be used as a processed product by forming of cutting lines 58 in individual preforms 10 during feeding of preform 10 before packaging 1, the thickness of the strip-like regions 24 of the preform 10 can be safely reduced, thereby effectively reducing the flexural strength of the strip-like regions 24.

In particular, the present embodiment can prevent swelling of the box 14 caused by excessively shallow or excessively deep fold lines formed on the workpiece 10, and thus prevent the adhesive sections of the workpiece 10 from being disconnected due to bloating and prevent the separation of adjacent sections into the workpiece 10 and, ultimately, to improve the quality, including the formability of the box 14 and, thus, the packaging 1. Thus, this embodiment allows you to reliably form the fold lines on the workpiece e 10 without affecting the properties of the material web and significantly improves the performance and quality of the workpiece 10, the box 14 and thus the package 1.

In addition, since the feed device 8 is provided with a clearance adjustment device 56 for adjusting the gap between the pair of cutting roller 42 and the guide roller 44, it is possible to simply adjust the depth of the cut lines 58 in the workpiece 10. This can further improve the performance and quality of the box 14, and thus packaging 1.

In addition, the radius of curvature R of the side edges 68 of the pre-bending guide 60 is smaller than the radius of curvature of the rounded edges of the box 14. Therefore, providing a restoring force to the rounded edges of the box 14, tending to return to a flat state when the box 14 is formed, the workpiece 10 can be bent into the direction opposite to the direction of the restoring force during the preliminary bending of the workpiece 10, which allows the workpiece 10 to exhibit a stronger bending tendency in this direction. Thus, the strip-like regions 24 of the workpiece 10 can be folded more firmly, allowing you to further improve the quality of the box 14 and, thus, the packaging 1.

In addition, the portion 70 of the convex curved surface 70 and the sections of the concave curved surface 72 are formed on the lower surface 60a of the pre-folding guide 60, and the workpiece 10 is folded between these parts and the corresponding portion 74 of the curved surface and the sections 76 of the curved surface of the table 62. This allows bend the workpiece 10 in the opposite direction to the aforementioned restoring force of the rounded edges of the box 14, allowing the workpiece 10 to exhibit a stronger tendency to bend atsya in this direction. Furthermore, smoothly rounded edges can be easily formed. Thus, the strip-like regions 24 of the workpiece 10 can be bent even more reliably, making it possible to further improve the quality of the box 14 and, thus, the packaging 1.

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

For example, in the present embodiment, in the pressing regions 46 on the outer peripheral surface 42c of the cutting roller 42, blades 48 are formed around the outer peripheral surface 42c along the circumferential direction of the outer peripheral surface 42c. However, this is not a limitation, and the blade 48 may be located partially along the peripheral direction on the pressing regions 46 of the outer peripheral surface 42c, for example, as shown in FIG. 10.

In addition, as shown in FIG. 11, concave portions 84 may be formed partially along the peripheral direction in the pressure regions 52 on the outer peripheral surface 44c of the guide roller 44. In FIGS. 11 and 12, when the workpiece 10 is conveyed by the conveyor rollers 30, by controlling the rotation position of the cutting roller 42 or the guide roller 44, broken lines 58 of the cut can be formed in the strip-like regions 24 of the workpiece 10.

In particular, as shown in FIG. 12, the box 14 and thus the package 1 can be formed, so that they are provided so that from the strip-like regions 24 of the workpiece 10, the cut lines 58 are not formed in the upper wall 86, formed on the lid of the box 14, and the bottom wall 88 formed on the main part of the box 14. This allows you to significantly expand the design options of the box 14 and, thus, the packaging 1.

In addition, the blades 48 can partially vary along the lengths of the tips in the direction along the periphery of the pressing regions 52. This allows the formation of cut lines 58 of different depths in the strip-like regions 24 of the workpiece 10. In this case, the bending strength of the strip-like regions 24 of the workpiece 10 can be controlled, thereby further increasing box quality 14 and thus packaging 1.

In addition, since the respective main parts 42a and 44a of the cutting roller 42 and the guide roller 44 can be detached by replacing the main parts 42a and 44a of the rollers, transport rollers 30 can be designed, the shape of which is shown in FIG. 10 and 11. In addition, it is easy to replace the blank 10 with the mold shown in FIG. 14 or 17, described later, and thus replace the box 14 with the mold shown in FIG. 15 or 18.

In particular, as shown in FIG. 13, the blades 48 of the cutting roller 42 provided in the pressing regions 46 may be shaped so that the tips 48b are inclined with respect to the circumferential direction of the outer peripheral surface 42c. In this case, as shown in FIG. 14, a large number of cut lines 90 inclined with respect to the longitudinal axis of the workpiece will be formed in the strip-like regions 24 of the workpiece 10. Further, by selecting the paper quality of the web of material, it is possible to form a box 14 thus constructed so that the slash pattern 92 can be seen by straight edges 16 that become rounded edges, as shown in FIG.

In addition, as shown in FIG. 16, blades 48 provided with the first tips 48c and second tips 48d can be formed, the first tips 48c are inclined with respect to the peripheral direction of the outer peripheral surface 42c, and the second tips 48d intersect with the first tips 48c . Such blades 48 may be formed by pressing regions 46 in the form of a mesh pattern by means of a notch or the like. In this case, as shown in FIG. 17, the cut lines 94 inclined with respect to the longitudinal axis of the workpiece 10 and the cut lines 96 intersecting the cut lines 94 are formed in large numbers in the strip-like regions 24 of the workpiece 10. Next, by selecting the quality paper web material, it is possible to form a box 14, designed so that the mesh pattern 98 can be seen through the straight edges 16, which become rounded edges, as shown in Fig. 18.

In addition, as shown in FIGS. 14 and 17, if cut lines 90, 94 and 96 are formed that are inclined with respect to the longitudinal axis of the workpiece 10, even if one blade 48 cuts in some way too deeply into the strip-like region 24 of the workpiece 10, completely divided between adjacent sections of the workpiece 10 along the cut lines 90, 94 and 96 can be avoided.

In addition, although in the present embodiment, the cut lines 58, 90, 94 and 96 are formed in the rear surfaces 18 of the strip-like regions 24 of the blank 10, the cut lines 58, 90, 94, and 96 can be formed in areas other than the strip-like regions 24 of the blank 10 or in the surface of the strip-like regions 24. Thus, by applying the present invention, various cut lines can be formed at various places in accordance with the design of the desired box 14.

Furthermore, although in the present embodiment, the preform 10 is transported with its longitudinal axis located along the conveyance line 26, the preform 10 can be transported with its longitudinal axis located in a direction perpendicular to the conveyance line 26. In this case, the cut lines 58 can be formed in a straight edge between the upper wall 86 formed in the lid of the box 14 and the main part of the box 14 or in the straight edge between the main part of the box 14 and the lower wall 88 of the main part, allowing you to further expand the design options of the box 14 and, therefore, packaging 1.

In addition, a large number of transport rollers 28, 30, and 32 and transfer disks 34 and 36 described in the present embodiment are not limited to the rollers and disks described in the present embodiment. For example, only the transport rollers 30 provided with the cutting roller 42 can be installed directly in the course of the method in front of the pre-bending station 38 without installing the transfer discs 34 and 36.

In addition, although in the example described in the present embodiment, cut lines 58 are formed in the blank 10 used to form the hinged lid package 1, the present invention can be applied to the blank 10 used to form various packages or inner frames in addition to Pack 1 with hinged lid.

19 is a perspective view illustrating a package 1 with a hinged lid with an open lid 100. The inner frame 102 is attached to a box 14 of the package 1 with a hinged lid. The blank 10 for the box 14 and the blank 10 for the inner frame 102 differ in the required printing state of the surface of the blank 10 with a difference in the product brand and have material properties that differ in the bulk of the fiber (for example, from 200 to 250 g / m ² ) and density.

For example, from 1 (a common value) to 2 allows the cover 100 to be easily held by the inner frame 102 by providing a concave portion (not shown) in the portion of the inner frame 102 and thereby ensure that the cover 100 is properly closed. In this case, to the concave portion I did not experience fatigue due to the increasing number of times the lid 100 was opened and closed, and in order to prevent the lid 100 from being closed incorrectly, the preform 10 made of a material with a relatively high fiber density (for example, from 0.8 to 1.0 / cm ³⁾ is used for the inner frame 102. The present invention is applicable to the workpiece 10 with material properties required of the inner frame 102 as well as from the box 14.

<Second Embodiment>

The pre-bending station provided on the workpiece feeder of the second embodiment will be described hereinafter with reference to FIGS. 20-24. Note that the main differences from the first embodiment will be described, and that a description of other components may be omitted by referring to components in the drawings with the same reference numbers as the corresponding components in the first embodiment.

As shown in FIG. 20, at the pre-bending station 104, the first pressing surface 67a1 of the first bending roller 67a and the second pressing surface 67b1 of the second bending roller 67b are formed with different radii of curvature. In particular, in the present embodiment, the first bending roller 67a has a circular cross section of a smaller diameter than the second bending roller 67b, the first pressing surface 67a1 is formed with a smaller radius of curvature than the second pressing surface 67b1, and the distance between the first pressing surface 67a1 and the side edge 68 greater than the distance between the second clamping surface 67b1 and the side edge 68 when it is given a pre-bending angle.

Thus, in the present embodiment, when a blank with a small thickness of paper is used, the restoring force of the blank, tending to return to a flat state before folding, is small. Therefore, for example, as in the case of the first embodiment, if the first and second clamping surfaces 67a1 and 67b1 are installed with the same radius of curvature by using the first and second bending rollers 67a and 67b of the same diameter, as shown in FIG. 21, the inner the valves 22a positioned inside the box 14 during the formation of the box 14 assume a position with too much inclination to the inside of the box 14, increasing the pre-bending angles of the internal valves 22a. Therefore, the inner valves 22a and the outer valves 22b become too wide apart during the formation of the box 14, which makes it impossible to overlap and correctly attach the opposite valves by gluing or the like, which can damage the box 14 and, thus, the package 1 with hinged lid .

In contrast, in the second embodiment, the first bending roller 67a is defined in a circular cross section of a smaller diameter than the second bending roller 67b, and the first pressing surface 67a1 is defined with a smaller radius of curvature than the second pressing surface 67b1, and therefore the distance between the first the pressing surface 67a1 and the side edge 68 are made larger than the distance between the second pressing surface 67b1 and the side edge 68 when the pre-bending angle is set. This allows you to reduce the angle of pre-bending of the internal valves 22a and, thereby, allows you to slightly bend the strip-like region 24 of the workpiece 10.

Thus, as shown in FIG. 22, the inner valves 22a can be positioned upright inside the box 14 during the formation of the box 14. Thus, by controlling the change in the shape of the fold between the inner valves 22a and the outer valves 22b in the pre-folding step of the workpiece 10 the degree of variability of the workpiece 10 can be reduced and the productivity and quality of the box 14 and, thus, the package 1 with a hinged lid can be easily improved, as in the case of the first embodiment.

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

For example, at the pre-folding station 106 shown in FIG. 23, although the first and second bending rollers 67a and 67b have the same diameter, the conveying surface 40 of the pre-folding guide 60 is formed so that from the side edge 68, the first side edge 68a is pressed the first bending roller 67a was smaller in width than the second side edge 68b pressed by the second bending roller 67b.

Even so, the distance between the first pressing surface 67a1 and the side edge 68 becomes larger than the distance between the second pressing surface 67b1 and the side edge 68 when the pre-bending angle is set. Thus, the pre-bending angle of the inner valve 22a is reduced, ultimately providing a slight bend of the strip-like regions 24 and, thereby, allowing the inner valves 22a to be placed in a vertical position inside the box 14 during the formation of the box 14.

You can also control the change in the shape of the bend between the inner valves 22a and the outer valves 22b by controlling the action of the elevator 66 and thereby changing the contact angle α with respect to the side edges 68 between the first and second bending rollers 67a and 67b. In particular, if the first bending roller 67a is installed smaller in contact angle α than the second bending roller 67b, the pre-bending angle of the inner valves 22a is reduced, ultimately allowing the banded region 24 to be slightly bent, and thereby allowing the inner valves 22a to be placed vertically position inside the box 14 during the formation of the box 14.

In addition, at the pre-bending station 108 shown in FIG. 24, two bending unit devices 108A and 108B are provided instead of two bending roller devices 67a and 67b. Each of the bending unit devices 108A and 108B is made, for example, from one first bending unit (first bending unit or bending unit) 110a and three second bending units (second bending elements or bending units) 110b.

The bending units 110a and 110b are extendably / retractably coupled to respective sliding devices not shown. The first bending unit 110a sets the pre-folding angle to the inner valves 22a by bending the internal valves 22a, while, on the other hand, the second bending units 110b sets the pre-bending angle to the outer valves 22b by folding the outer valves 22b.

In the first and second bending blocks 110a and 110b, the first and second pressing surfaces 110a1 and 110b1 for pressing against the side edges 68 by strip-like regions 24 are formed into a concave surface opposite to the side edges 68 of the pre-folding guide 60. The first pressing surface 110a1 is formed with a larger radius of curvature than the second pressing surface 110b1. This reduces the pre-bending angle of the inner valve 22a, ultimately allowing slightly bent strip-like regions, and thereby allowing the inner valves 22a to be upright inside the box 14 during the formation of the box 14.

Furthermore, if the distance by which the first bending unit 110a is shifted to the side edge 68 is less than the distance by which the second bending unit 110b is shifted to the side edge 68 by controlling the action of the sliding devices, the distance between the first pressing surface 110a1 and the side edge 68 less than the distance between the second pressing surface 110b1 and the side edge 68 is provided when the pre-bending angle is set. This reduces the pre-bending angle of the inner flaps 22a, ultimately allowing the strip-like regions 24 to be slightly bent, and thereby allowing the inner flaps 22a to be placed upright inside the box 14 during the formation of the box 14.

Finally, the present invention can be practiced not only by combining the first and second embodiments, but also by arranging only the second embodiment. That is, even if the cut lines 58 are not formed in the strip-like regions 24 of the workpiece 10 by the cutting roller 42, it is certainly possible to reduce the quality changes of the workpiece 10 based only on the bending force of the strip-like areas of the workpiece 10 at the pre-bending station described above, and it is easy to increase productivity and the quality of the box 14 and thus the package 1 with a hinged lid.

Explanation of Reference Positions

1 Packing with hinged lid (packing)

4 Shop blanks (source of supply)

8 Feeder

10 Procurement

12 Bending turret (packing machine)

14 Box

16 straight edge

18 Back surface

22 valve section

22a Internal valve

22b Outside valve

24 Stripy area

26 Transportation line

30 Transport roller (pair of rollers)

38 Pre-bending station

40 Transport surface

42 Cutting roller (one of the rollers)

42c Outer peripheral surface

44 Guide roller (the other of the rollers)

44c Outer peripheral surface

46 pressure area

48 blade

48a Tip along the peripheral direction of the outer peripheral surface

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

48c First tip inclined with respect to the peripheral direction of the outer peripheral surface

48d Second tip crossing the first tip

52 pressure area

56 Clearance adjustment device

58 Cut Line

60 Guide pre-bending

64A, 64B Bending roller device (bending element)

67a First bending roller (first bending element, bending roller)

67a1 first clamping surface

67b Second bending roller (second bending element, bending roller)

67b1 Second pressing surface

68 Side edge

70 plot convex curved surface

72 plot concave curved surface

78 trajectory

84 notch

90 Cut Line

94 Cut line

96 Cut Line

108A, 108B The device of the bending unit (bending element)

110a First bending unit (first bending element, bending unit)

110a1 first clamping surface

110b Second bending unit (second bending element, bending unit)

Claims (68)

1. The device for the supply of blanks, designed to feed the blanks used to form the packaging box, on a packaging machine containing: a transportation line for transporting the blanks one at a time along the transport surface by moving from the source of supply of the blank to the packaging machine; and a pair of rollers arranged to rotate on opposite sides of the conveying surface by each drive shaft and provided with a clamping region on the outer peripheral surface for feeding the blanks, while pressing the strip-like blank region corresponding to the straight edge of the box, and a clearance adjustment device for adjusting a clearance between a pair of rollers by moving up and down each of the drive shafts, wherein one of the pair of rollers has a large number of blades in the pressing region of the roller so that when the workpiece passes between the pair of rollers, the blades are able to form a large number of cut lines in the strip-like region of the workpiece to reduce the flexural strength of the strip-like region, and the rotation position of one or the other of the pair of rollers is controllable in the peripheral direction. 2. The workpiece feeding device according to claim 1, wherein the blades are partially provided in the peripheral direction of the pressing region, and broken lines of the cut are formed in strip-like regions by controlling the rotation position of one and the other of the pair of rollers in the peripheral direction. 3. The workpiece feeding device according to claim 1, wherein the other pair of rollers is partially provided with a concave portion in the peripheral direction of the pressure region of the roller, and discontinuous cut lines are formed in strip-like regions by controlling the rotation position of one and the other of the pair of rollers in the peripheral direction. 4. The workpiece feeding device according to claim 1, wherein the pair of rollers forms cut lines in the back surface of the strip-like region of the workpiece, in which the back surface becomes the inner surface of the box. 5. The workpiece feeding device according to claim 1, wherein one of the pair of rollers is located on the upper side of the transport surface. 6. The workpiece feeding device according to claim 1, wherein the blades are formed with tips in the pressing region, the tips continue along the peripheral direction of the outer peripheral surface. 7. The workpiece feeding device according to claim 1, wherein in the pressing region, the blades are formed with tips inclined with respect to the peripheral direction of the outer peripheral surface. 8. The workpiece feeding device according to claim 1, wherein in the pressing region, the blades are formed with first tips inclined with respect to the peripheral direction of the outer peripheral surface and second ends intersecting with the first ends. 9. The workpiece feeding device according to claim 6, in which the tips of the blades have a wedge-shaped shape with an acute angle. 10. The workpiece feeding device according to claim 9, wherein the blades partially vary along the length of the tips in the peripheral direction of the pressing region. 11. The workpiece feeding device according to claim 1, wherein the longitudinal axis of the workpiece continues along the conveyance line. 12. The preform bending device according to claim 1, further comprising a pre-bending station located in the pre-bending position, installed downstream of the pair of rollers and intended for pre-bending the strip-like region of the workpiece and setting the angle of pre-bending of the strip-like region when the workpiece is in the pre-bending position . 13. The workpiece feeder according to claim 12, wherein the pre-folding station comprises: a pre-folding guide located on the conveyance line and provided with a lateral edge extending along the conveyance line, moreover, when the workpiece is in the pre-folding position, the workpiece is folded under the pre-folding guide and the workpiece valve section protrudes from the side edge, while the valve section is provided with a strip-like region, and a bending element located close to the lateral edge of the pre-bending guide and provided with an axis extending along the lateral edge; and however, the bending element is configured to bend the valve section by pressing the strip-like region along the lateral edge and thereby setting the angle of the preliminary bending of the valve section with respect to the workpiece. 14. The workpiece feed device according to item 13, in which in the strip-like region of the workpiece, a straight edge is formed with a rounded edge; and the lateral edge has a radius of curvature less than the radius of curvature of the rounded edge. 15. The workpiece feeder of claim 14, wherein the pre-bending guide has a convexly curved surface portion protruding in a direction opposite to the bending direction of the valve section; and the workpiece is folded under a convexly curved surface in the pre-bending position. 16. The workpiece feeder of claim 15, wherein a pre-bending guide is attached to opposite ends of the convexly curved surface portion by means of smooth arcs, and the pre-bending guide further comprises a concave curved surface portion pressed into the bending direction of the valve section and attached to the side edge to form a smooth arc; and the workpiece is folded under the portion of the convex curved surface and the portion of the concave curved surface in the pre-bending position. 17. The workpiece feed device according to item 13, in which the valve section comprises an internal valve located inside the box during the formation of the box, and an external valve located outside the box during the formation of the box; the bending member comprises a first bending member for bending the inner valve and a second bending member for bending the outer valve; and the first and second bending elements define different angles of preliminary bending to the internal and external valves. 18. The workpiece feeder according to claim 17, wherein the first and second bending elements respectively comprise first and second clamping surfaces for setting pre-bending angles of the strip-like region by pressing the strip-like region along the side edge; and the distance between the first pressing surface and the side edge is greater than the distance between the second pressing surface and the side edge when the pre-bending angles are set. 19. The workpiece feed device according to claim 17, in which the lateral edge sets the width of the conveying surface by positioning the pre-folding guide on opposite sides; and the transport surface of the first side edge is formed such that in the pre-bending guide, the transport surface formed by the first side edge intended to press the first bending member is smaller in width than the transport surface formed by the second side edge intended to press the second bending element. 20. The workpiece feeding device according to claim 17, wherein the first and second bending elements are bending rollers designed to bend the inner and outer valves by moving along a path surrounding the outer side of the side edge and pressing a strip-like region along the side edge. 21. The workpiece feeding device according to claim 17, wherein the first and second bending elements are bending units for bending the internal and external valves by moving in the direction of the side edge and pressing the strip-like region to the side edge. 22. The workpiece feeder according to claim 1, wherein the package is a hinged package. 23. A blank feed device for feeding blanks used to form a packaging box onto a packaging machine, comprising: a transport line for transporting the blanks one at a time along the transport surface by moving from a blank feed source to the packaging machine; a pair of rollers arranged to rotate on opposite sides of the transport surface and provided with a clamping region on the outer peripheral surface for feeding the blanks, while pressing the strip-like blank region corresponding to the straight edge of the box; and a pre-bending station located in the pre-bending position, installed downstream of the pair of rollers and intended for pre-bending the strip-like region of the workpiece and setting the angle of pre-bending of the strip-like region when the workpiece is in the pre-bending position, Pre-bending station contains: a pre-folding guide located on the conveyance line and provided with a lateral edge extending along the conveyance line, moreover, when the workpiece is in the pre-folding position, the workpiece is folded under the pre-folding guide and the workpiece valve section protrudes from the side edge, while the valve section is provided with a strip-like region, and a bending element located close to the lateral edge of the pre-bending guide and provided with an axis extending along the lateral edge; wherein the bending element is configured to bend the valve section by pressing a strip-like region along the lateral edge and thereby setting the angle of pre-bending of the valve section with respect to the workpiece, the valve section comprises an internal valve located inside the box during the formation of the box, and an external valve located outside the box during the formation of the box; the bending member comprises a first bending member for bending the inner valve and a second bending member for bending the outer valve; and the first and second bending elements define different angles of preliminary bending to the internal and external valves. 24. A method for feeding blanks used to form a packaging box onto a packaging machine, the method includes a cutting step in which a large number of cut lines are formed in the strip-like region of the workpiece to reduce the flexural strength of the strip-like region by transferring the workpieces one at a time along the transport surface from the workpiece feed source to the packaging machine, while pressing the strip-like region of the workpiece corresponding to the straight edge of the box, the cutting step, the depth of the cut lines is adjustable in the strip-like region and the broken lines of the cut are formed in the strip-like region STI. 25. The method of supplying preforms according to paragraph 24, further comprising the step of pre-folding, which pre-bend the strip-like region of the workpiece and set the angle of pre-folding of the strip-like region when the workpiece is in the pre-bending position established during the execution of the method after the cutting step. 26. The workpiece feeding method according to claim 25, wherein in the pre-folding step, when the workpiece is in the pre-folding position, the workpiece is folded on the pre-folding guide, the workpiece valve section is forced to protrude from the side edge of the pre-folding guide, the valve section is provided with a strip-like region, and the section the valves are bent by pressing a strip-like region along the side edge by means of a bending element located in close proximity to the side Vågå edge guide prefolding. 27. The method of supplying blanks according to claim 26, in which: the valve section comprises an internal valve located inside the box during the formation of the box, and an external valve located outside the box during the formation of the box; the bending member comprises a first bending member for bending the inner valve and a second bending member for bending the outer valve; and at the stage of pre-bending, the first and second bending elements define different angles of pre-bending of the internal and external valves. 28. A method for feeding blanks used to form a packaging box onto a packaging machine, including the pre-folding step, in which the strip-like region of the preform is pre-bent and the angle of pre-folding of the strip-like region is set when the workpiece is in the pre-bending position by transporting the blanks one at a time along the transport surface from the supply source of blanks to the packaging machine for feeding blanks, while pressing the strip-like region of the blank corresponding to the straight edge of the box, and in the pre-folding step, when the workpiece is in the pre-folding position, the workpiece is folded on the pre-folding guide, the workpiece valve section is forced to protrude from the side edge of the pre-folding guide, the valve section is provided with a strip-like region, and the valve section is bent by pressing the strip-like region along the side edge by means of a bending element located in close proximity to the lateral edge of the guide bending the valve section comprises an internal valve located inside the box during the formation of the box, and an external valve located outside the box during the formation of the box, the bending member comprises a first bending member for bending the inner valve and a second bending member for bending the outer valve, and at the stage of pre-bending, the first and second bending elements define different angles of pre-bending of the internal and external valves.

Images