JPH08224806A - Box manufacturing machine for packaging box reinforced with octagonal inner cylinder - Google Patents

Abstract

PURPOSE: To form an inner cylinder integrally while forming an outer box by forming an octagonal inner cylinder inside the outer box while folding given flap sections positioned on the four corners of a blank by folding sections and also forming the octagonal inner cylinder inside the outer box while a square box is formed jointly with a bottom face panel at the same time when a side face panel is stood up by a forming component. CONSTITUTION: Blanks S retained integrally in a magazine are fed into folding sections successively, and paste (g) is applied to the given positions of a bottom face panel and flaps on four corners by hot metal guns 21... at that time. Then one blank is lowered by a suction unit by one stage, and given flap sections on the four corners of the blank are folded facing upward by 90 by a first folding means 32, and further folded into the L-shape by an L-shape folding means 33. Then the flap sections are folded facing upward by 90 by a second folding means 37, and the ends are bonded with side face panel inner faces of the blank by a lower section pressure fixing unit 38. After that, the flap sections are fed to a forming section, and a box C is formed by standing up the face panel of the blank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box making machine, and in particular, a large number of blanks (corresponding to a flat panel punched out in a shape of a predetermined box punched out) made of corrugated board or cardboard, which are sequentially folded horizontally at a folding portion. After being supplied, the predetermined flap portions located at the four corners of the blank are bent, and after the bending process is completed, the blank is advanced to the forming portion, and the four side panels and the bottom panel of the blank form a quadrangular shape. The present invention relates to a box making machine for a packaging box in which an inner box having an octagonal shape is integrally formed inside the outer box while the outer box is completed, and the inner tube reinforces the outer box from the inside.

The present invention also relates to a box making machine for a packaging box for a bag-in-box for packaging fluid articles such as liquids, powders, viscous materials (such as Anko).

[0003]

2. Description of the Related Art Metal cans (so-called tin cans) are still in the mainstream as large-sized containers for containing liquids. However, the metal can has a heavy container weight and is not easy to dispose of. Therefore, a so-called “bag-in-box” liquid container made of paper, which uses a paper container, has been developed and used. This "bag-in-box" uses a paper container such as a corrugated cardboard box as the exterior and has a soft plastic bag installed inside it, so that the defects of the paper container, which is weak against water, can be compensated with a plastic bag, and direct filling of liquid is possible. It is the one.

Due to this characteristic, the bag-in-box is
Demand is spreading as a liquid container for transportation, storage, trading, or use in the food field such as liquor, oil, drinking water, and industrial chemical fields such as adhesives, developers, and battery liquids. However, there is a drawback, and the improvement is required.
That is, in the bag-in-box, the side surface of the outer box (outer box) is buckled during stacking storage, and the overturned load is likely to collapse. In addition, the internal pressure (including liquid oscillation due to vibration during transportation) generated by the liquid filled in the bag (inner bag) as the interior acts on the wall surface of the exterior and the wall surface bulges outward (bulging), the bag Could rub against the corners or steps of the outer box, resulting in pinholes and liquid leakage.

Therefore, the applicant first solved the above-mentioned problems, and the four sides of the outer box did not cause blistering, tipping, or collapse of the load during stacking storage, and the bag was kept in the box. For the purpose of preventing scratches, scratches, and pinholes at corners or steps, a quadrilateral cylindrical outer box C made of a cardboard or other cardboard is formed, and the outer box is formed. A bag-in-box (FIG. 20 (A)) in which an inner bag B made of soft plastic is installed inside C is proposed (Japanese Patent Application No. 6-
1996172). The features of this application are:
Centering on a square or rectangular bottom panel, two sets of corresponding side panels are extended around the four sides, and on either side of either one of the two corresponding side panels, By extending four inner-cylinder forming flaps and stacking the inner-cylinder forming flaps on the inner surface of the side panel forming the outer box, and integrally fixing the inner-cylinder forming flaps via ruled lines provided between the inner-cylinder forming flaps. , A substantially octagonal inner cylinder is formed inside the outer box (see FIG. 20 (B)), and inside the inner cylinder, as shown in FIG. 20 (A), larger than the diameter of the inner cylinder. An inner bag B made of soft plastic is arranged.

In the above bag-in-box, a box used as an exterior is formed by punching a thick and hard paper such as a piece of cardboard or paperboard into a predetermined shape.
Hereafter, this is called blank. Here, the specific plan shape of the blank S used in the present invention is shown in FIG. Centering on the rectangular bottom panel 1, two sets of side panels 2, 2, 3, 3 corresponding to the four sides of the bottom panel
And the inner lids 4 and 4 and the outer lids 5 and 5 are connected to each other on the extension of each of these two sets of side panels. On the left and right extensions of the pair of side panels 3 and 3, parallel fold lines a to
The outer flap 8 and the inner flaps 9, 10, 11 are successively connected via c. These flaps 8 to 11 form an inner cylinder of an octagonal cylinder and are joined to the inside of the side panel using a hot melt adhesive at the time of assembly. The length T of the flap as a whole is substantially the total length of the side panel 2 and the inner lid 4. The length of the outer flap 8 is formed to be about half the width L of the side panel. Reference numeral 6 is a hand hole used for dismantling, and reference numeral 7 is an outlet for pouring liquid from the inner bag.

[0007] The blank S has a one-piece structure in which an outer box and an inner cylinder are integrally formed.
Mechanical assembly (automatic box making) was difficult because it was necessary to assemble a rectangular inner cylinder and bond it to the inner surface of the outer box. Therefore, the flap for forming the inner cylinder is joined to the inner surface of the side panel by a manual procedure (manual assembly) while bending it in a predetermined procedure, and the side panel is raised in a rectangular tube shape to form an octagonal inner tube. And joined together.

[0008]

In assembling the outer box from one flat panel as described above, the predetermined flap portion of the blank is manually bent, and after the bending process is completed,
Forming an octagonal inner cylinder integrally with the four side panels and the bottom panel of the blank while forming a quadrangular outer box is difficult to assemble and reduces productivity. In addition, the cost is high, and it is difficult to automate and line the process of inserting the inner bag into the inner cylinder and the process of filling and packaging liquid products.

According to the present invention, the process from the blank state to the assembling of the outer box and the inner cylindrical portion can be automatically performed without manual work. That is, a large number of blanks stacked and held in a magazine are sequentially fed horizontally to the folding section, and predetermined flap sections located at the four corners of the blank are bent at the folding section, and after the bending process, the blank is finished. While advancing to the molding section, while forming the side panel of the blank in the molding section and forming the quadrangular outer box in cooperation with the bottom panel, the octagonal inner cylinder is formed inside the outer box,
An object of the present invention is to provide a box making machine for a packaging box in which an inner cylinder in the box reinforces the outer box from the inside when the assembly is completed.

[0010]

In order to achieve the above object, the box making machine of the present invention comprises a blank folding part, a blank molding part, a means for advancing the blank to the folding part and the molding part, and a blank predetermined position. And a means for discharging the molded product from the molding section. The folding part is capable of (A) receiving a blank and being lowered by two steps arranged so that a predetermined position on the lower surface of the blank can be sucked and held. A unit; and (B) an outer position of the suction unit, which is attached to a frame provided around the folding portion and is disposed so as to oppose to a lowering center line of the blank that is suction-held through the suction unit. When the first stage of the blank descends,
Two pairs of front and rear first bending means for guiding the flaps located at the four corners of the blank and bending them upward by 90 degrees; (C) provided on the frame at a position adjacent to the first bending means; Two sets of front and rear L-bending means for further bending the bent flap part into an L-shape; (D) being provided inside the first bending means and the L-bending means, and provided on the frame; First
During the L-bending process by the L-bending means from the time of step descent, in order to prevent the flap part that is erected upward from falling inward, the front and rear parts are suspended above and above the flap part of the blank so as to be lifted and lowered. Two sets of holding means; (E) two sets of front and rear folding habit applying means for applying outward fold habit to the tip of the flap portion that is hung adjacent to the holding means and erected upward; (F) Under the first bending means, attached to the frame, and when the blank is lowered by the second step, L
Two sets of front and rear second bending means for bending the bent flap portion further upward by 90 degrees; (G) After the end of the 90 degree bending by the second bending means, the tip of the flap portion having a crease Has a pair of lower crimping units suspended from the frame of the folding section so as to be vertically movable so as to be joined to the inner surfaces of the left and right side panels of the blank.

The means for applying the glue is such that when the blank is supplied to the folding section, the blank is glued to a predetermined position on the upper surface thereof.
And a second gluing means for gluing to a predetermined position on the outer surface of the flap portion which has been erected upward after the 90 degree bending by the second bending means is completed.

After the gluing by the second gluing means is completed, the molding section has a molding mechanism for joining the flap section to the inner surfaces of the front and rear side panels while raising the side panel of the blank upward. The forming mechanism includes a homing die and a mandrel descending from above the homing die. The mandrel pushes the blank into the homing die to form the blank into a box shape.

The suction unit is supported by a two-stage lifter attached to the frame of the folding section.

The first bending means is formed by a pair of parallel bar-like members which are hook-shaped bent downward. This is arranged around the descent center line of the blank so as to project from the outside toward the blank, and abuts and guides the lower surface of the flap portion of the blank at the time of the first descent of the blank so as to guide the blank at a predetermined position. Bend 90 degrees upward.

The second bending means is formed by a pair of parallel bar-like members which are hook-shaped bent upward. This is arranged around the descending center line of the blank so as to project from the outside toward the blank, and contacts the lower surface of the L-bent flap portion of the blank to guide it when descending the second stage of the blank. Bend the flap up 90 degrees.

The L-bending means is a box-shaped member having an open upper surface arranged between a pair of parallel bar-shaped members constituting the first bending means, and supports the box-shaped member and raises and lowers it at a predetermined angle. And a drive mechanism for driving.

The lower crimping unit has side crimping means for the flap portion, which is bent at 90 degrees, at two locations inside the head portion.

The holding means and the crease imparting means are supported by the frame of the folding section so as to be able to move up and down through a cylinder, and when the blank is loaded into the folding section, the blank is retracted above the loading position and the blank is the first. When descending to the step level, it moves to near the blank support level.

The holding means is formed of a plate which is upright so as to be orthogonal to the bottom panel of the blank, and the folding-giving means is composed of a pusher which moves up and down outside the plate.

In the blank, centering on the bottom panel 1, two sets of side panels 2, 2, 3, 3 corresponding to the four sides of the bottom panel are extended, and the two side panels are extended. , The inner lids 4, 4 and the outer lids 5, 5 are connected to each other, and on the left and right extensions of the pair of side panels 3, 3, the outer flap 8, the inner flap 9, through parallel folding lines a to c. 10,
11 are sequentially connected. These flaps 8-11
Is an inner cylinder of an octagonal cylinder that is joined to the inside of the side panel using a hot melt adhesive during assembly.

[0021]

According to the present invention, as shown in the operation flow chart of FIG. 1, the blanks S accumulated and held in the magazine are first fed horizontally, for example, from the top to the folding section 27 of the machine. . At the time of supply, glue g of hot melt adhesive or the like is placed at predetermined positions on the bottom panel of the blank and the flaps at the four corners.
Is applied in a streak pattern. A predetermined position on the lower surface of the blank is suction-held at the receiving position. Next, with a suction unit that can be lowered by two stages, while the blank is lowered by two stages, when the first stage is lowered,
The predetermined flap portions located at the four corners of the blank are bent 90 degrees upward by the first bending means 32. Next, the flap portion bent at 90 degrees is further bent into an L shape by an L bending means. Next, when the second stage descends, the L-bent flap portion is further bent upward by 90 degrees by the second bending means 37, and the tip end of the flap bent by 90 degrees is joined to the inner surface of the side panel of the blank by the lower crimping unit 38. . Then, after the 90-degree bending by the second bending means 37 is completed, it is horizontally fed from the folding section 27 to the next forming section 50. At that time, the glue g is applied in a streak-like manner at a predetermined position on the outer surface of the flap portion which is erected upward. Finally, the blank is pushed into the homing die by the mandrel by the forming mechanism including the homing die and the mandrel descending from the top of the homing die, and the side panel of the blank is raised to be formed into a box shape. FIG. 20 (b) is a perspective view of the product (packaging box) C after completion of molding.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. 2 and 3 show an outline of a box making machine according to the present invention. FIG. 2 is a schematic front view and FIG. 3 is a schematic plan view.

[Overall Structure] 20 is a magazine part, and flat plate blanks S punched into a predetermined shape are accumulated and held on a table lifter 21. 22 is a vacuum pad that picks up the blanks from the magazine one by one from the top, 23 is a kicker that feeds the adsorbed blanks toward the feed roll 24, 26 is a hot melt gun, and the blanks are inserted into the folding section 27. During the horizontal introduction process, the hot-melt adhesive is applied in a streak-like manner at predetermined positions on the upper surface of the blank. Reference numerals 30a to 30c denote three sets of suction units arranged at the folding portions. These three sets of suction units are provided at the center and front and rear of the folding part, respectively, and suck and hold predetermined positions on the lower surface of the side panel part and the flap part of the blank to bend them to predetermined flap parts located at four corners of the blank. After processing, the blank can be supported horizontally until the bending process is completed. 31 is a suction unit 2
It is a two-stage lifter that moves up and down in stages. 50 is a molding part. When the blank is supplied from the folding section 27 to the molding section 50, the adhesive is applied to the flap of the blank by the second hot melt gun 49. The forming unit has a forming mechanism that joins the flaps to the front and rear side panel inner surfaces while raising the side panel of the blank upward. The forming mechanism includes a homing die 51 and a mandrel 52 that descends from above the homing die. The mandrel 52 pushes the blank into the homing die 51 to form the blank into a box shape. Reference numeral 60 denotes a discharge unit, which has a conveyor 61 that is taken out from the lower portion of the homing die and carried out.

[Magazine Unit] As shown in FIGS. 4 and 5, the magazine unit 20 is installed on the table lifter 21 for horizontally holding and holding a large number of flat plate-shaped blanks S and on the upper part of the table lifter. A vacuum pad 22 that sucks and takes out the blanks one by one, a kicker 23 that sends the sucked blanks toward a feed roll 24, a blank end receiver 25 that cooperates with the kicker, and a blank that is horizontal at the folding portion 27. Feeding roll 24 to be introduced into
When the blank is horizontally introduced into the folding portion 27, glue such as hot melt adhesive is applied in a streak shape at predetermined positions on the bottom panel portion and the flap portion on the upper surface of the blank (g portion in FIG. 1).
It consists of three hot melt guns 26 and a feed conveyor 28. The feed conveyor 28 sequentially supplies the blanks horizontally to the folding section 27 (see FIG. 6).

[Folding portion] The folding portion 27 sequentially bends the predetermined flap portions located at the four corners of the blank S while lowering the blank S in two steps as described later. As shown in FIGS. 2, 6, 18, and 19, three sets of suction units 30a to 30c supported by a two-stage lifter 31 so as to be able to move up and down are provided at the folding portion into which the blank is fed.

In each of the drawings described below, each member (mechanism) forming a "set", which is disposed so as to face each other around the descending center line of the blank, shows only one and the other is not shown. There is.

The suction units 30a to 30c (see FIG. 18)
(Refer to FIG. 8) are respectively provided in the central portion and the front and rear of the folding portion 27, and suck and hold predetermined positions on the lower surface of the side panel portion and the flap portion of the blank S (the portions marked with a circle in FIG. 8). These suction units are connected to a vacuum generator (not shown) via suction lines (A) and (B), respectively, and suck the blank S at a predetermined timing via a controller (not shown) provided separately. The action can be exerted or the suction action can be stopped. FIG. 18 shows the timing of suction and suction stop (suction release) of the suction units 30a to 30c when the blank is lowered. That is, these three sets of suction units are the first by the two-stage lifter 31.
At the time of step lowering, a predetermined position on the lower surface of the side panel and the flap of the blank is suction-held. When the second-stage lifter 31 lowers the second stage, the two suction units 30a, 3
The suction of 0b is stopped (no suction), and a predetermined position on the lower surface of the side panel is suction-held by only the central suction unit 30c. The suction unit 30c stops suction (no suction) when the lower crimping unit moves up, as described later.

Blank S lowered by the two-stage lifter 31
Around the descending center line of the
Bending means 32 is provided. The first bending means 32 is
As shown in FIG. 7, it is formed by a pair of hook-shaped parallel bar-shaped members that are bent downward, and is attached to the frame F of the folding part outside the suction unit. This member contacts the lower surface of the flap 9 of the blank S and guides the flap 9 to bend the predetermined position a upward by 90 degrees when the blank is lowered by the first stage. Then, the inner flaps 9, 10, 11 located at the four corners of the blank S are bent upward by 90 degrees along the folding line a, as shown in FIG. 8B.

Further, adjacent to the first bending means 32,
Two sets of L-bending means 33 are provided before and after the flap portion bent at 90 degrees is further bent into an L-shape. This L
The bending means 33 is attached to the frame F as shown in each of FIGS. 7, 9, 10 and 11 and is arranged between a pair of parallel rod-shaped members constituting the first bending means 32. ing.

The L-bending means 33 is composed of a box-shaped member 34 having an open upper surface, a lever 35 for supporting the box-shaped member 34 and raising and lowering the box-shaped member 34 by a predetermined angle, and a drive mechanism 36. The box-shaped member 34 is normally in the stand-by standby position as shown in FIG. 7. As mentioned above, the inner flaps 9, 10, 1
When 1 is bent 90 degrees upward along the fold line a, the rod of the drive mechanism (cylinder) 36 attached to the lever 35 provided at the fulcrum of the box-shaped member 34 contracts,
As shown by the solid line in FIG. 9, the flaps 9, 10, 11 of the blank are further tilted around a fulcrum to be further bent into an L shape.

Further, from the time of the first stage descending of the blank, the L
During the L-bending process by the bending means 33, in order to prevent the flap portion of the blank which is raised upward from falling inward, two sets of front and rear holding means 41 and the tip of the flap portion which is raised upward are attached to the outside. Two sets of front and rear crease imparting means 42 for imparting a crease in the direction are provided (FIG. 9).
These means 41 and 42 are inside the first bending means 32 and the L bending means 33, and are suspended above and above the flap portion of the blank in a frame F of the folding portion so as to be able to move up and down. . Further, the means 42 is suspended adjacent to the hold means 41.

As shown in FIGS. 9, 10 and 11, the holding means 41 and the crease imparting means 42 are supported by a cylinder 43 fixed to the frame F so as to be able to move up and down. These means retreat above the carry-in position when the blank is carried into the folding section 27, and when the blank descends from the original position to the first stage level, the rod of the cylinder 43 is extended to near the support level of the blank. To prevent the blank flaps from falling inward. The holding means 41 of this embodiment is formed by an upright plate that is orthogonal to the bottom panel of the blank. The crease imparting means 42 comprises a pusher bar 45 driven by a mini cylinder 44 attached below the cylinder 43.

Below the first bending means 31, two pairs of front and rear second bending means 37 are provided so as to face each other. As shown in FIGS. 6, 7, and 12, the second bending means 37 is formed by a pair of parallel bar-shaped members that are bent upward and have a hook shape. This second bending means 37
Like the first bending means 32, is attached to the frame F of the folding portion so as to project from the outside toward the blank S around the descending center line of the blank. This means 37 contacts the lower surface of the flap 8 of the blank when the blank S is lowered by the second step, and further bends upward by 90 degrees along the boundary line between the L-bent flap portion of the blank and the side panel. .

As shown in FIGS. 6, 12 and 13, above the side panel 2 of the blank into which the folding section 27 is introduced, a pair of lower crimping units 38 which can be raised and lowered from the frame F of the folding section are provided. It is hanging. The lower crimping unit 38 is provided with a box-shaped head 40 having an inverted trapezoidal shape in the lower part of a cylinder 39, and a rod of the cylinder 39 extends from the top of the blank so that the tip end 11 of the flap portion is located on the left and right sides of the blank. After being pressure-bonded to the inner surface of the side panel 2, the cylinder rod contracts and ascends and retracts.
Inside the head 40, side crimping means 70 of a flap portion bent by 90 degrees is provided at two locations having a positional relationship facing the second bending means 37. This side crimping means is composed of a side crimping cylinder driven by pushing and pulling, and as shown in FIGS. 12 and 13, cooperates with the second bending means 37 to clamp the flaps 8 and 9.

As shown in FIG. 6, a means 73 for forcibly separating the blank from the suction unit is provided between the suction units 30a to 30c. This means 73 is provided with a roller 71 and a cylinder 72 for pushing up the roller. This means 73 performs an operation of pushing up the roller 71 by the push-up cylinder 72 when the lower crimping unit 38 rises and forcibly cutting off the blank from the suction unit.

[Means for Conveying from Folding Section to Forming Section] When the bending processing of the predetermined flap sections located at the four corners of the blank is completed, all suction of the suction unit is stopped, and then the blank is formed into the forming section 50. Be delivered to. The conveying means to the forming unit includes a kicker 81 that horizontally sends the blank toward the forming unit 50 at a predetermined timing, a guide 82 that horizontally supports the blank, a conveyance guide 84, and the like.

As shown in FIGS. 14 and 15, when the blank S is horizontally introduced into the molding section 50 by a kicker,
Above the guide 82, a pair of front and rear hot melt guns 83 that apply glue such as a hot melt adhesive in a streak shape to a predetermined position of the flap portion that is erected upward are provided.

[Molding Section] The molding section 50 has a molding mechanism that joins the flaps to the inner surfaces of the front and rear side panels while raising the four side panel of the blank upward with the bottom panel as the center. This molding mechanism is shown in FIGS.
As shown in FIG. 7, it comprises a homing die 51 and a mandrel 52 descending from the top of the homing die. The mandrel 52 pushes the blank into the homing die 51 to form the blank into a box shape. The blank formed in the box is taken out from the lower part of the homing die 51 and carried out by the carry-out conveyor 61.

[0039]

According to the present invention, a large number of blanks are sequentially fed horizontally to the folding portion, the predetermined flap portions located at the four corners of the blank are sequentially bent, and the blank is formed after the bending process is completed. And a side panel and a bottom panel of the blank to form a quadrangular outer box,
It is possible to obtain a box making machine for a packaging box in which a rectangular inner cylinder is integrally formed with an outer box, and when completed, the inner cylinder in the box reinforces the box from the inside. Therefore, the present invention is
Since the process from the blank state to the assembling of the octagonal inner cylinder and outer box can be performed continuously by a machine rather than by hand, the cost of box making and packaging work is low, and the inner bag is inserted and liquid It has a new industrial effect in that it can easily achieve the automation of product filling and packaging process and the shipment and shipping of the product.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an operation flow of a box making machine of the present invention.

FIG. 2 is a schematic front view showing an outline of a box making machine of the present invention.

FIG. 3 is a schematic plan view similar to FIG.

FIG. 4 is an elevational view of a magazine unit.

FIG. 5 is a plan view of the same.

FIG. 6 is a schematic front view of a folding part.

FIG. 7 shows a positional relationship between the suction unit, the first bending means, the second bending means, and the L bending means in the folding section, and a state when the blank is bent 90 degrees by the first bending means when the blank is lowered by the first step. 2 is a schematic side view shown.

FIG. 8 (A) is a perspective view showing the suction position of the same blank, and FIG. 8 (B) is an enlarged perspective view showing a state when the blank is bent 90 degrees by the first bending means.

FIG. 9 is a schematic side view showing a positional relationship between the suction unit, the holding means and the L bending means in the folding section, and a state when the blank flap bent at 90 degrees is L bent.

FIG. 10 is a schematic side view showing the state after the same L-bending.

FIG. 11 is an enlarged perspective view showing a state in which the above blank is L-bent.

FIG. 12 is a view showing the positional relationship between the suction unit and the lower crimping unit in the folding section, and when the front end of the flap section of the blank is joined to the inner surface of the left and right side panels after the blank is bent by 90 degrees by the second bending unit. It is the side view which showed the state.

FIG. 13 is an enlarged perspective view showing a state in which the same blank is joined to the inner surface of the side panel by the lower crimping unit.

FIG. 14 is a schematic side view of a kicker means for conveying a blank from a folding section to a molding section.

FIG. 15 is a schematic front view of the same.

FIG. 16 is a schematic side view showing a positional relationship between a homing die, a mandrel, and a product carry-out conveyor.

FIG. 17 is a schematic front view of the same.

FIG. 18 is an explanatory diagram showing the suction position of the suction unit with respect to the blank and the timing of suction and suction stop (suction release) when the blank is lowered.

FIG. 19 is an explanatory diagram showing a relationship between a two-stage lifter and a suction unit.

20A is a perspective view of a bag-in-box in which an inner bag B made of a soft plastic is installed inside an outer box C, FIG.
(B) is a perspective view showing only the outer box with the inner bag removed.

FIG. 21 is a plan view of a blank used in the box making machine of the present invention.

[Explanation of symbols]

 A blank B inner bag C outer box F frame 20 magazine part 21 table lifter 22 vacuum pad 23 kicker 24 feed roll 25 blank receiver 26 hot melt gun 27 folding part 28 feed conveyor 30a suction unit 31 two-stage lifter 32 first bending means 33 L bending means 34 Box-shaped member 35 Lever mechanism 36 Drive mechanism 37 Second bending means 38 Lower crimping unit 39 Cylinder 40 Head 41 Holding means 42 Folding imparting means 43 Cylinder 44 Mini-cylinder 45 Pusher 49 Hot melt gun 50 Forming section 51 Homing Die 52 Mandrel 60 Ejection section 61 Carry-out conveyor 70 Side crimping means

Claims (11)

[Claims] 1. A large number of blanks made of corrugated cardboard or paperboard accumulated and held in a magazine are sequentially fed horizontally to a folding portion, and predetermined flap portions located at four corners of the blank are bent, and after bending processing is completed. A box making machine for advancing a blank to a forming part to integrally form an octagonal inner cylinder on the inside while forming a quadrangular outer box by a side panel and a bottom panel of the blank. A blank folding part, a blank molding part, a means for advancing the blank to the folding part and the molding part, a means for applying glue to a predetermined position of the blank, and a means for discharging the molded product from the molding part; The folding part is (A) capable of receiving a blank and descending in two stages arranged so as to adsorb and hold a predetermined position on the lower surface of the blank. (B) a descending center line of the blank which is attached to a frame provided around the folding portion and is suction-held via the suction unit at an outer position of the suction unit. Are arranged around each other, and when the first stage of the blank descends,
Two pairs of front and rear first bending means for guiding the flaps located at the four corners of the blank and bending them upward by 90 degrees; (C) provided on the frame at a position adjacent to the first bending means; Two sets of front and rear L bending means for further bending the bent flap portion into an L shape; (D) Inside the first bending means and the L bending means, provided on the frame, and First
During the L-bending process by the L-bending means from the time of step descent, in order to prevent the flap part that is erected upward from falling inward, the front and rear parts are suspended above and above the flap part of the blank so as to be lifted and lowered. Two sets of holding means; (E) two sets of front and rear folding habit applying means for applying outward fold habit to the tip of the flap portion that is hung adjacent to the holding means and erected upward; (F) Under the first bending means, attached to the frame, and when the blank is lowered by the second step, L
Two sets of front and rear second bending means for bending the bent flap portion further upward by 90 degrees; (G) After the end of the 90 degree bending by the second bending means, the tip of the flap portion having a crease A pair of lower crimping units suspended from the frame of the folding section so as to be vertically movable so as to be joined to the inner surfaces of the left and right side panels of the blank; Box-making machine for reinforced packaging boxes. 2. The means for applying the glue is a first glue means for gluing the blank at a predetermined position on the upper surface when the blank is supplied to the folding section, and an upward direction after the 90 degree bending by the second bending means. The box making machine for a packaging box reinforced with an octagonal inner cylinder according to claim 1, further comprising a second gluing means for gluing the flap portion to a predetermined position on the outer surface of the flap portion. 3. The molding unit comprises a molding mechanism for joining the flaps to the front and rear side panel inner surfaces while raising the four side panels of the blank upward after the gluing by the second gluing means is completed. The claim 8 having
Box-making machine for packaging boxes reinforced with a rectangular inner cylinder. 4. The box making machine for a packaging box reinforced by an octagonal inner cylinder according to claim 1, wherein the suction unit is supported by a two-stage lifter attached to a frame of a folding portion. 5. The first bending means is arranged around the descending center line of the blank so as to project from the outside toward the blank, and contacts the lower surface of the flap portion of the blank when descending the first stage of the blank. 2. The packaging box reinforced with an octagonal inner cylinder according to claim 1, wherein the flap is formed by a pair of parallel bar-shaped members that are bent downward and are bent 90 degrees upward at a predetermined position. Box making machine. 6. The second bending means is arranged so as to project from the outer side toward the blank around the descending center line of the blank, and when the second stage of the blank descends, the L of the blank is lowered.
The octagonal inner cylinder according to claim 1, wherein the octagonal inner cylinder is formed by a pair of parallel bar-shaped members that are bent upward and are in contact with the lower surface of the bent flap portion and bend the flap portion upward by 90 degrees. Box-making machine for packaging boxes reinforced with. 7. The L-bending means is a box-shaped member having an open upper surface arranged between a pair of parallel rod-shaped members forming the first bending means, and the box-shaped member supporting the box-shaped member at a predetermined angle. The drive mechanism for tilting the mechanism 8 up and down according to claim 1,
Box-making machine for packaging boxes reinforced with a rectangular inner cylinder. 8. The packaging box reinforced with an octagonal inner cylinder according to claim 1, wherein the lower crimping unit has side crimping means of flaps that are bent 90 degrees at two locations inside the head section. Box making machine. 9. The holding means and the crease imparting means,
When loading a blank into the folding frame via the cylinder, the blank is retracted above the loading position, and is supported so that it can move up and down to move to the vicinity of the blank support level when the blank descends to the first level. 2. The octagonal inner cylinder according to claim 1, wherein the holding means is formed by a plate that is upright so as to be orthogonal to the bottom plate of the blank, and the crease imparting means includes a pusher that moves up and down outside the plate. Box-making machine for reinforced packaging boxes. 10. The molding mechanism comprises a homing die and a mandrel descending from the top of the homing die, and the mandrel presses the blank into the homing die to mold the blank into a box shape. Box making machine for packaging boxes reinforced with an octagonal inner cylinder. 11. The blank has two sets of side panels 2, 2, 3, 3 corresponding to four sides of the bottom panel extending from the bottom panel 1 as an center, and the two sets of side panels are extended. Inner lids 4 and 4 and outer lids 5 and 5 are connected to each other, and on the left and right extensions of the pair of side panels 3 and 3, the outer flap 8 and the inner flap are provided through parallel folding lines a to c. 9, 10,
The box-making machine for a packaging box according to claim 1, which has a configuration in which 11 are sequentially connected.