JP3486732B2 - Packaging box box making equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-making apparatus for forming a carton blank developed into a sheet into a box shape.

[0002]

2. Description of the Related Art Conventionally, as a box forming apparatus for forming a carton blank expanded into a sheet into a box shape, a mandrel reciprocating between an upper standby position and a lower bending position, and a plurality of guide members. And a bottom plate of the carton blank is pressed downward by a mandrel, and each side flap connected to the bottom plate is bent by a plurality of guide members, thereby forming a box-shaped device. There is.

[0003]

The mandrel and the guide are different due to the difference in the shape of each side flap connected to the bottom plate of the carton blank and the shape of each flap depending on the presence or absence of the upper surface flap connected to the side flap. There is a problem that the carton blank is misaligned during molding due to the difference in molding resistance from the member, resulting in defective molding. Further, when the mandrel is moved upward from the lower side of the molded packaging box to remove it, in order to prevent the box from rising along with the mandrel, the packaging box is slightly opened toward the upper opening. The mandrel was removed from the box to reduce the resistance of the mandrel, but it is pointed out that the molding accuracy is deteriorated in a packaging box having a depth, which makes molding difficult.

Further, the packaging box after molding is formed into a box shape by bending each side flap with a mandrel and a plurality of guide members based on the folding rules pre-applied to the expanded carton blank. Therefore, there is a problem that the bent base portions of the side flaps continuously provided on the bottom plate and the bottom plate are not reliably bent, resulting in a rounded finished shape.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in order to preferably solve the above-mentioned problems, and provides a box-making apparatus for a packaging box capable of forming a packaging box with good molding accuracy. With the goal.

[0006]

In order to solve the above problems and to achieve the initial object, a box manufacturing apparatus for a packaging box according to the present invention is a box forming apparatus for forming a carton blank expanded in a sheet shape into a box shape. In the box device, the auxiliary folding member that matches the crease position of each side flap continuously provided on the bottom plate of the carton blank and each side flap continuously provided on the bottom plate of the carton blank are A plurality of bending guide members that cooperate with the member to bend and form a box shape, and the side flaps that are connected to the bottom plate of the carton blank by the auxiliary bending member and the bending guide member are directed upward. when bending, that occasion bending the outer angle of the base portion is bent size <br/> rather folding than 90 degrees, the inner side of the side flaps該折bending base
It is characterized in that the bottom plate is configured to be attracted and held in a deformed state so as to be deformed upward .

In order to achieve the above-mentioned object, a packaging box box making apparatus according to another invention of the present application is a box making apparatus for forming a carton blank developed into a sheet into a box shape. The auxiliary bending member, which is set to the size corresponding to the bottom plate of the carton blank, is provided at a position corresponding to the crease position of each side flap continuously provided on the bottom plate. A mandrel that moves between an upper standby position and a lower bending position,
Inside each auxiliary bending member of the mandrel, suction means for sucking the upper surface of the bottom plate of the carton blank above the lower end position of the auxiliary bending member, and disposed below the molding position, the mandrel. When the descent from the standby position toward the bending position, each side flap continuous with the bottom plate of the carton blank, in cooperation with each auxiliary bending member, is bent to form a plurality of boxes. Inside the bending guide member and the mandrel,
It is arranged to be movable between a return position and an pushing position, and is composed of a pushing member that pushes the packaging box after bending from the mandrel by moving from the returning position to the pushing position. And

[0008]

In the box making apparatus according to the first aspect of the present invention, the auxiliary folding member supports the crease positions with the side flaps connected to the bottom plate of the carton blank at the lower end thereof,
Each side flap, which is continuously provided on the bottom plate of the carton blank in cooperation with the plurality of folding guide members, is bent and formed into a box shape. The Upon folding of each side flap, that occasion bent to the outside of the base portion is bent rather large folding than 90 degrees, the bottom plate of the carton blank is attracted to and held in a deformed state by the suction means. Therefore, a reliable folding habit is given to the bent base portion of the bottom plate and each side flap.

In the box-making apparatus according to the second aspect of the present invention, the carton blank positioned at the molding position is continuously moved to the bottom plate of the blank by lowering the mandrel facing the standby position above the carton blank. The lower end of the auxiliary folding member abuts at a position that matches the folding line position with the side flap. The bottom plate of the carton blank is suction-held by the suction means. When the mandrel descends to the bending position, each side flap continuously provided to the bottom plate is bent in cooperation with each auxiliary bending member and the corresponding bending guide member to be formed into a box shape. . At this time, since the bottom plate of the carton blank is held by the suction means, each side flap can be bent accurately without the blank being displaced. Then, the folding-molded packaging box is reliably extruded by operating the pushing member installed in the mandrel.

Further, with the lower end of each auxiliary bending member in the mandrel supporting the crease position with each side flap continuous with the bottom plate of the carton blank,
By suctioning the upper surface of the bottom plate by the suction means at a position above the lower end position of the auxiliary folding member, the bottom plate is held in a state in which the inside of the folding line position with each side flap is deformed upward. Therefore, the bending angle of the outer bottom plate and the side flaps during folding bending can size than 90 degrees Kusuru, reliable Orikuse is given.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a box-making apparatus for a packaging box according to the present invention will be described in detail below with reference to the accompanying drawings with reference to preferred embodiments. For convenience of description, the front and rear correspond to the transfer direction of the carton blank, the downstream side is referred to as the front, the upstream side is referred to as the rear, and the direction intersecting the transfer direction is referred to as the left and right when viewed from the upstream side. And

As shown in FIG. 1, a box making apparatus 1 according to an embodiment.
0 is a sheet hopper 13 for storing and transferring a plurality of carton blanks 12 developed in a sheet shape on the upper part of the machine frame 11, and a carton blank 12 from the front end side (downstream side in the transfer direction) of the carton blank group. A take-out device 14 for taking out the sheets one by one is provided. This take-out device 1
At the take-out position where the carton blank 12 is taken out by 4, the pair of guide rails 1 having an L-shaped cross section is formed.
Carton blank 12 in which 5 and 15 are arranged at a predetermined interval in the left-right direction and taken out by a take-out device 14.
Is placed between the vertical portions 15c, 15c of both guide rails 15, 15. Also, the pair of guide rails 15, 15 are
The carton blank 12 extends to a molding position, which will be described later, and is horizontally transported while being guided by the guide rails 15 and 15 from the take-out position to the molding position.

As shown in FIG. 7, the carton blank 12 stored in the sheet hopper 13 has a front side flap 12b and a rear side flap 12c which are connected to each other in front of and behind a bottom plate 12a through folding lines K and K. At the same time, folds K are formed on the left and right of the front side flap 12b and the rear side flap 12c.
The glue allowance flaps 12d and 12d are connected in series via K, respectively. In addition, the left and right side flaps 12e, 12e are continuously provided on the left and right sides of the bottom plate 12a via folding lines K, K,
An upper surface flap 12f is continuously provided on the rear edge of the rear side surface flap 12c through a crease K. Furthermore, the top flap 1
A folding flap 12g is continuously provided on the rear edge of 2f via a folding line K, and folding lines K are formed on the left and right sides of the upper surface flap 12f.
The left and right side flaps 12h, 12h are connected in series via K. Then, in the embodiment, the carton blank 12 is aligned and stored in the seat hopper 13 in a standing posture in which the front side flap 12b is on the lower side, and the carton blank 12 is stored by the take-out device 14 in the front side flap 12.
Both guide rails 1 with b facing forward (molding position side)
It is designed to be placed horizontally on 5,15. The horizontal portions 15a, 1 of both guide rails 15, 15
As shown in FIG. 3, the distance between the inner sides of the guide rails 5a is set to be larger than the length of the bottom plate 12a of the carton blank 12 in the left-right direction.
a, 15a, left and right side flaps 12e, 12e, 12h,
12h and the flaps 12d, 12d are placed, and the mandrel 19 described later is configured to allow the bottom plate 12a to move downward.

A pusher 16 for horizontally moving back and forth between both rails 15 and 15 is disposed on the side opposite to the molding position with the position where the guide rails 15 and 15 are disposed, and the pusher 16 is not shown. The carton blank 12 placed at the take-out position of both guide rails 15 and 15 is moved to the forming position by being moved forward by the driving means.

Between the take-out position and the forming position, the left and right side flaps 12e, 12 of the carton blank 12 transferred along the guide rails 15, 15 are conveyed.
The gluing device 17 is arranged at the upper position corresponding to e, respectively, and the gluing nozzle 17 is directed downward of the gluing device 17.
By a, glue such as hot melt is applied to the left and right side flaps 12e, 12e that are continuously provided on the bottom plate 12a. In the embodiment, the left and right side flaps 12
In order to be able to glue the glue margin flaps 12d, 12d that are connected to the front and rear side flaps 12b, 12c to the front and rear side flaps 12e, 12e, glue is applied to the left and right side flaps 12e, 12e spaced apart in the front-rear direction. Gluing device 17,1 to apply
7 is controlled to operate.

A holding member 18 attached to the machine frame 11 horizontally faces the molding position, and the guide rails 15 and 15 are fixed to the holding member 18. As shown in FIG. 3, the holding member 18 includes a bottom plate 12a, front and rear side flaps 12b, 1 of the carton blank 12.
2c, the left and right side flaps 12e, 12e and the glue flaps 12d, 12d are provided with an opening 18a which allows passage of a substantially rectangular sheet portion.
A mandrel 19, which will be described later, is configured to move up and down at a position facing between the guide rails 15 and 15 in 8a. In addition, as shown in FIG. 3, the horizontal portions 15a, 15a of the guide rails 15, 15 facing the forming position are longer than the front-rear dimensions of the left and right side flaps 12e, 12e continuously provided on the bottom plate 12a of the carton blank 12. Further, cutout portions 15b, 15b are formed such that approximately half of the glue flaps 12d, 12d that are continuously provided on the front and rear side flaps 12b, 12c are supported by the horizontal portions 15a, 15a.

A mandrel 19 is disposed above the molding position to press down the carton blank 12 that has reached the position and is positioned therein, and cooperates with a plurality of guide members to be described later to mold it into a box shape. . As shown in FIGS. 4 and 5, the mandrel 19 includes a rectangular support plate 20 and four auxiliary bending pieces arranged along the four sides of the support plate 20 and hanging downward by a predetermined length. It is formed as a suction box that opens downward from the member 21. Further, the outer dimensions of the mandrel 19 are set to a size corresponding to the bottom plate 12a of the carton blank 12, and the crease positions with the side surface flaps 12b, 12c, 12e, 12e that are connected to the bottom plate 12a.
Each auxiliary bending member 21 is adapted to match the (bending base).

A cylindrical support member 37 connected to an unillustrated suction source such as a blower or a vacuum generator is provided on the upper surface of the support plate 20, and the hollow portion of the support member 37 and the mandrel are separated from each other. , The support plate 20 is configured to communicate with each other through a suction port 22 formed therein. That is, with the lower end of each of the auxiliary bending members 21 (the lower end of the opening of the mandrel 19) in contact with the corresponding position of the bottom plate 12a of the carton blank 12, the blank 12 can be sucked and held by the negative pressure generated in the mandrel. Is configured. Thus, in the embodiment,
The mandrel 19 itself functions as a suction means for sucking the upper surface of the bottom plate 12a of the carton blank 12.
As shown in FIG. 5, the suction port 22 is provided in the support plate 20.
With respect to the position where a substantially rectangular air cylinder 26, which will be described later, is disposed, the air cylinder 26 extends outward from each surface and is not blocked even when the cylinder 26 is disposed on the support plate 20. It is formed in a shape that does not exist.

As shown in FIGS. 1 and 2, a rail 23 of a predetermined length is arranged on the machine frame 11 facing the side opposite to the take-out position with the molding position interposed therebetween so as to extend in the vertical direction. At the same time, a slider 24 is slidably arranged on the rail 23, and a swing lever 25 is connected to a driving means (not shown).
The slider 24 is configured to move in the vertical direction along the rail 23 with the swinging of the. In this slider 24,
The mandrel 19 is arranged via a supporting member 37, and the mandrel 19 is moved by the vertical movement of the slider 24.
Is a molding position at which the carton blank 12 is positioned
It moves up and down between a standby position (FIG. 6A) above the (holding member 18) and a bending position below.

Inside the mandrel 19, as shown in FIG. 4, an air cylinder 26 vertically provided on the lower surface of the support plate 20 faces, and a piston rod 26a directed downward of the air cylinder 26 is pushed and pushed. A member 27 is provided. In this pushing member 27, the pushing surface 27a that comes into contact with the bottom plate 12a of the carton blank 12 is biased in the forward and reverse directions of the air cylinder 26 so that each of the auxiliary bending members 21 is pushed.
Is configured to move between a return position above the lower end position and an extruding position below the lower end position. And
By holding the bottom plate 12a of the carton blank 12 on the mandrel 19 with the pushing member 27 facing the returning position, as shown in FIG.
In a state where the bottom plate 12a is in contact with the pushing surface 27a of 7, the bottom plate 12a and the side surface flaps 12b, 1 connected to the bottom plate 12a.
The insides of the folding bases (folding line positions) with 2c, 12e, 12e are held in a state of being deformed upward.

On the lower surface of the holding member 18, folding guide members 28 for gluing are vertically provided at positions corresponding to the four gluing flaps 12d facing the inside of the opening 18a (see FIG. 3). The carton blank 12 pushed down by the mandrel 19 has left and right side flaps 12e, 12
Prior to the bending of e, the four glue margin flaps 12d are configured to be bent inward by the four glue margin folding guide members 28, respectively. A mounting plate 30 is horizontally arranged below the holding member 18 via a plurality of stays 29, and the opening 1 of the holding member 18 is provided in the mounting plate 30.
An opening (not shown) corresponding to 8a is opened. A front bending guide member 31 and a rear bending guide member 32 are arranged on the upper surface of the mounting plate 30 at front and rear positions sandwiching the opening, and the left bending guide member 3 is arranged at the left and right positions.
3 and the right turn guide member 34 are arranged. That is, by lowering the mandrel 19 from the standby position to the bending position, the front and rear side flaps 12b, 12c, 12e, 12e of the carton blank 12 are
Bending guide member 3 corresponding to each of the auxiliary bending members 21
It is bent by cooperation with 1, 32, 33, 34. At this time, the left and right side flaps 12e, 12e that have been glued are overlapped with each other on the outer side of each of the glue allowance flaps 12d, and the carton blank 12 has the upper surface flap 12f.
The folding flap 12g and the folding flap 12g are formed in a box shape having an upper surface opening shape formed by extending upward from the rear side surface flap 12c.

Below the mounting plate 30, a box conveying conveyor 35 that travels in a direction intersecting the transfer direction of the carton blank 12 is disposed at a position spaced apart by a predetermined height, and the packaging box 36 after bending is formed. The conveyor 35 is configured to be transferred to the next boxing process. Mounting plate 3
0 is the upper surface flap 12 of the packaging box 36 after molding.
Notch that allows passage of f and folding flap 12g
(Not shown) is formed so as to communicate with the opening.

[0023]

Next, the operation of the packaging box box making apparatus according to the embodiment having the above-described structure will be described.

When the box making device 10 is operated, the carton blank 12 on the front end side in the carton blank group stored in the sheet hopper 13 is taken out by the take-out device 14.
And is placed at the take-out position on the pair of guide rails 15, 15. At this time, carton blank 1
2 is placed so that the front side flap 12b faces the front side. Next, the pusher 16 starts to move forward, and the carton blank 12 is horizontally transferred from the take-out position to the forming position. And carton blank 1
Left and right side flaps 12 connected to the second bottom plate 12a
The side flaps 12 corresponding to the glue from the glue applying nozzle 17a are activated when the glue applying devices 17 are activated at the timing when the glue applying devices 17 and 17e pass below the arranging positions of the glue applying devices 17 and 17.
It is applied to two places before and after e and 12e.

When the carton blank 12 arrives at the forming position, the left and right side flaps 12e, 12e which are continuously provided on the bottom plate 12a as shown in FIG.
When positioned so as to correspond to the notches 15b, 15b, the mandrel 19 facing the standby position starts to descend, and a suction source (not shown) and the mandrel 19 are communicated with each other to give a suction action to the mandrel 19. . Due to the lowering of the mandrel 19, the lower end of each of the auxiliary bending members 21 is brought to the upper surface that matches the crease position of the bottom plate 12a of the carton blank 12 and the side flaps 12b, 12c, 12e, 12e that are connected to the bottom plate 12a. By abutting, a negative pressure is generated in the mandrel 19, and the bottom plate 12a is suction-held.
At this time, since the pushing surface 27a of the pushing member 27 installed in the mandrel 19 faces the returning position above the lower end position of the auxiliary bending member 21, as shown in FIG. The side surface flaps 1 connected to the bottom plate 12a in a state where the substantially center thereof is in contact with the pushing surface 27a.
The insides of the bent base portions 2b, 12c, 12e, and 12e are held in a state of being deformed upward.

When the mandrel 19 is further lowered in this state, the glue allowance flaps 12d, 12d, 12d, 12d of the carton blank 12 correspond to the folding guide members 28, 28, 28, 28 for the glue allowance. And are bent inwardly. Further, the front and rear and left and right side flaps 12b, 12c, 12e, 12e are brought into contact with the front and rear and left and right folding guide members 31, 32, 33, 34 corresponding to the mounting plate 30. It can be bent inside, respectively. At this time, since the bottom plate 12a of the carton blank 12 is adsorbed and held by the mandrel 19,
Without the blank 12 is misaligned, each side flap 12b, 12c, 12e, 12e and the margin flap 1 2
Accurate folding of d is achieved. Further, since the bending bases of the bottom plate 12a and the side surface flaps 12b, 12c, 12e, 12e are held so as to be deformed upward inward of the mandrel 19, they are in contact with the lower ends of the auxiliary bending members 21. Side flaps 12 that can be bent upward
b, 12c, 12e, bent base of 12e, as shown in FIG. 6 (b), the outside bent much larger than the 90 degrees,
A certain habit is given.

When the mandrel 19 is lowered to the bending position, the left and right side flaps 12e, 12e which are continuously glued to the bottom plate 12a of the carton blank 12 are already bent. The flaps 12d and 12d are overlapped and attached to the outside,
The upper surface flap 12f and the folding flap 12g are formed in a box shape having an upper surface opening shape formed by extending upward from the rear side surface flap 12c.

Next, the communication state between the suction source and the mandrel 19 is cut off, the suction holding of the bottom plate 12a by the mandrel 19 is released, and the air cylinder 26 is urged to push the pushing member 27 to the return position. To the extrusion position. As a result, the packaging box 36 after folding and forming
Is pushed downward with the pushing surface 27a of the pushing member 27 in contact with the bottom plate 12a, and is pulled out from the mandrel 19 to be dropped and placed on the box conveyor 35.

In the box making apparatus 10 of the embodiment, the mandrel 1
Since the side flaps 12b, 12c, 12e, 12e and the glue flaps 12d are bent while the bottom plate 12a of the carton blank 12 is suction-held at 9, the blank 12
Can be suitably prevented from being misaligned to cause defective molding. Further, since the molded packaging box 36 is extruded by the pushing member 27 installed in the mandrel 19, even if the packaging box has a depth, it can be reliably extracted. That is, it is not necessary to mold the packaging box 36 so as to open outward toward the upper opening, and there is an advantage that the molding accuracy is improved.

In addition, the bottom plate 12 of the carton blank 12
folding the base portion of a and each side flap 12b, 12c, 12e, 12e, since the outside is bent rather large folding than 90 degrees, reliable Orikuse is given. That is, it is possible to prevent the bent base portions of the molded packaging box 36 from being rounded and bulging, and to have an angular finished shape.

[0031]

[Modification] In the embodiment, the mandrel itself is made to function as a suction means, but a carton blank is sucked by, for example, providing a suction means separately or by attaching a suction means such as a suction cup to a pushing member installed in the mandrel. Hold it on the fold base when you fold the flap
That if the bending angle of the outer sufficient that size than Kunar so 90 degrees, the same effects as Example.

[0032]

As described above, according to the packaging box box making apparatus according to the first aspect of the present invention, the side flaps connected to the bottom plate of the carton blank are provided with auxiliary folding members and a plurality of folding guides. upon bending under the cooperative action of the member, to be bent outwardly much larger than the 90 degrees that occasion bending base, since the bottom plate is configured to suction held by the deformed state by the suction means, the bottom plate and each It is possible to give a certain folding habit to the folding base portion with the side flap. Therefore, the bulge of the bent base of the packaging box after molding can be minimized, and the molding accuracy can be improved.

According to the packaging box box making apparatus of the second aspect of the present invention, since the mandrel is provided with the suction means, the carton blank is not affected by each flap shape or the presence or absence of the top flap, and the like. The carton blank can be held securely during molding, and molding defects due to misalignment can be reliably prevented. Further, since the mandrel is internally provided with the pushing member for pushing out the molded packaging box, the packaging box can be reliably and rapidly removed from the mandrel.

Further, the bottom plate of the carton blank and the side flaps are set so that the bottom plate is sucked and held by the suction means at a position higher than the lower end position of the auxiliary bending member of the mandrel that abuts and supports from the upper side. since the, at the time of molding of the carton blank it can be molded on the outside of the bending state of angle bent rather large folding than 90 degrees with each side flap continuously provided on the bottom plate and which on the basis of the Orikei, reliable Orikuse Can be given. Therefore, the bulge of the bent base portion of the packaging box after molding can be minimized.

When the mandrel also serves as the suction means as in the box making apparatus according to the third aspect of the invention, there is an advantage that the number of parts is reduced and the manufacturing cost is kept low.

[Brief description of drawings]

FIG. 1 is a front view showing a box manufacturing apparatus according to an embodiment.

FIG. 2 is a side view of the box manufacturing apparatus according to the embodiment.

FIG. 3 is a plan view showing a guide rail at a molding position in the box manufacturing apparatus according to the embodiment.

FIG. 4 is a vertical sectional front view showing a mandrel of the box manufacturing apparatus according to the embodiment.

FIG. 5 is a bottom view showing the mandrel of the box manufacturing apparatus according to the embodiment.

FIG. 6 is an explanatory view showing a carton blank forming process using the mandrel and the guide member according to the embodiment.

FIG. 7 is a plan view of a carton blank.

[Explanation of symbols]

12 carton blank 12a bottom plate 12b Front side flap 12c Rear side flap 12e Left and right side flaps 19 Mandrel (adsorption means) 21 Auxiliary bending member 27 Push member 27a Pushing surface 28 Bending guide member for glue substitution 31 Front bending guide member 32 Post-bending guide member 33 Left bending guide member 34 Right turn guide member

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-276518 (JP, A) Actual exploitation Sho 61-173330 (JP, U) Japanese Patent Sho 45-16632 (JP, B1) (58) Field (Int.Cl. ⁷ , DB name) B31B 1/00-17/74

Claims (3)

(57) [Claims] 1. A carton blank expanded into a sheet shape.
A box-making device for molding (12) into a box shape, which matches the crease position with each side flap (12b, 12c, 12e, 12e) continuously provided on the bottom plate (12a) of the carton blank (12). Auxiliary bending member (21), and each side flap (12b, 12c, 12e, 12e) continuously provided on the bottom plate (12a) of the carton blank (12), the auxiliary bending member
(21) a plurality of bending guide members (28, 31, 32, 33, 34) that are bent to form a box shape in cooperation with the auxiliary bending member (21) and the bending guide member (28 , 31,32,
33, 34) and the side flaps (12b, 12c, 12e, 12e) connected to the bottom plate (12a) of the carton blank (12) are directed upward.
When bending Te, than the outer angle of 90 degrees that occasion bending base
Bent rather large folding,該折bending the base of the side flaps (12b, 1
2c, 12e, 12e) Bottom plate (12a) so that the inside deforms upward
A box-making apparatus for a packaging box, comprising: a suction means (19) for suction-holding in a deformed state. 2. A carton blank expanded into a sheet shape.
A box-making device for forming (12) into a box shape, which is set to a size corresponding to the bottom plate (12a) of the carton blank (12), and each side flap (continuously provided on the bottom plate (12a) ( 12b, 12c, 12e, 12e) and a carton blank provided with an auxiliary bending member (21) provided at a position matching the crease position with (12b, 12c, 12e, 12e).
(12) a mandrel (19) that moves between a standby position above the molding position where the position is positioned and a bending position below, and inside each auxiliary bending member (21) in the mandrel (19), Adsorption means (19) for adsorbing the upper surface of the bottom plate (12a) of the carton blank (12) above the lower end position of the auxiliary bending member (21), and the mandrel disposed below the molding position. When the (19) descends from the standby position toward the bending position, each side flap (12b, 12c, 12e, 12e) continuously provided on the bottom plate (12a) of the carton blank (12), each of the auxiliary Bending member (21)
A plurality of bending guide members (28, 31, 32, 33, 34) that are bent in cooperation with each other to form a box shape, and inside the mandrel (19), between the return position and the pushing position. It is movably arranged, and is composed of a pushing member (27) for pushing the packaging box (36) after folding and forming from the mandrel (19) by moving from the return position to the pushing position. Box making equipment for packaging boxes. 3. The bottom plate (12a) of the carton blank (12) in the pushing member (27) which is built in the mandrel (19), wherein the mandrel (19) is configured as a suction box.
The return position of the pushing surface (27a) that comes into contact with is set above the lower end position of the auxiliary bending member (21), and the bottom plate (12a) of the carton blank (12) is attracted to the mandrel (19). When the bottom plate (12a) contacts the pushing surface (27a) of the pushing member (27), the inside of the crease position with each side flap (12b, 12c, 12e, 12e) is deformed upward. The box-making apparatus for a packaging box according to claim 2, which is held in a state where it is opened.