JP2002144450A - Apparatus for forming packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for forming a packaging box which can assemble the packaging box having corner columns at four inside corners automatically from a flat blank. SOLUTION: The first folding device 41 is installed in the first folding part 30a formed downstream from a feed part 1, and the fourth flaps formed at the four corners of the blank B are folded to positions arranged on the upper surface of the third flap and bonded. The second folding device 61, the third folding device 81, and a press device 91 are installed in the second folding part formed downstream from the first folding part 30a, and a pair of corner columns is formed in the upper surface both end parts of a pair of the side panels of the blank B by the actuation of each device. The blank B is pushed down by a push-down device 101 installed downstream from the second folding part 30b, and a pair of the side panels and a pair of end surface panels of the blank are erected by the contact between a pair of side flap folding guides 104 and a pair of end surface flap folding guides 105 which are installed below the blank B to form the packaging box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box forming apparatus for accommodating a soft synthetic resin inner bag filled with a liquid such as soy sauce or sake.

[0002]

2. Description of the Related Art Liquids such as soy sauce are usually filled and distributed in metal cans. However, such cans are expensive and heavy, making them difficult to handle and waste. There is an inconvenience that it takes time for the processing. Therefore, instead of such a can body, a paper-made liquid container called a bag-in-box using a paper container has been developed.
Is being used.

The above-mentioned bag-in-box has a packaging box made of a cardboard sheet as an exterior, and contains a soft synthetic resin bag (inner bag) filled with a liquid inside the packaging box. With an inner bag to enable liquid filling and packaging.

[0004] By the way, in the bag-in-boxes conventionally known, during storage in a stacked state, the side of the outer packaging box often buckles and collapses.

In addition, pressure acts on the body of the packaging box due to the internal pressure of the inner bag or vibration during transportation, and the pressure causes the body of the packaging box to bulge outward, or the inner bag forms the packaging box. Contact with the cut surface of the corrugated cardboard sheet may cause pinholes and cause liquid leakage.

In order to solve such inconvenience, the present applicant has proposed a packaging box A of a bag-in-box as shown in FIG. 20 (IV) in Japanese Patent Application No. 11-21083.

The packaging box A uses a blank B made of a corrugated cardboard sheet as shown in FIG. The blank B is continuously provided a pair of end faces the panel P ₂ via the folding lines to both ends of the bottom panel P _1, continuously provided the outer lid panel P ₃ via a fold line to the edge of each end face panel P ₂ are doing.

Further, continuously provided a pair of side panels P ₄ via the folding lines on both sides of the bottom panel P _1, the side panel P ₄
Both ends of which a first flap F ₁ to fourth flap F ₄ through the first folding lines a ₁ to fourth folding lines a ₄ provided continuously from the inside in order.

Furthermore, a pair of side panels P_FourEach of
Inner lid panel P through fold line on side edge _FiveAre connected.

The width between the fold lines a ₁ and a ₂ at both ends of the first flap F ₁ is not more than の of the width between both side edges of the end panel P ₂ .

When forming the packaging box A using the blank B, as shown in FIG. 20 (III), the first fold line a
_1, the third fold lines a ₃ to crease outward direction together with the second folding lines a ₂ and a 4 folding lines a ₄ to valley fold of the respective inward, the fourth flap F ₄ third flap F ₃
Adhered to, and a fourth flap F ₄ adhered to the side panels P _4, to form four corner posts C having a cavity of triangular top end portions of the side panels P _4.

After the formation of the corner support C, as shown in FIG. 20 (IV), the pair of side panels P ₄ and the pair of end panels P ₂ are each bent upward by 90 ° to form the corner support C.
It is to adhere to the inner surface of the end surface panel P ₂ a first flap F ₁ be formed.

[0013]

By the way, FIG.
In the case of forming the packaging box A shown in FIG. 20 (IV) from the flat blank B shown in FIG. 20 (I), the packaging box A is conventionally manually assembled, which is extremely inefficient and low in productivity. .

An object of the present invention is to provide an apparatus for forming a packaging box capable of automatically assembling a packaging box called a bag-in-box from a flat blank.

[0015]

In order to solve the above-mentioned problems, according to the present invention, a pair of end panels are connected to both ends of a bottom panel, and a pair of side panels connected to both sides of the bottom panel. A blank in which first to fourth flaps are sequentially provided at both ends of the panel via a fold line in order is used as a material for forming a packaging box, and a paper feed unit in which a large number of blanks are stacked; Bent portions forming corner posts at both ends of each side panel by bending the first to fourth flaps of the blank fed from the blank, and a pair of end face panels of the blank fed from the bent portion And a box forming portion that forms a rectangular packaging box by bending the pair of side panels upward by 90 °, wherein the bent portion overlaps the fourth flap with the upper surface of the third flap. A first folding means for bending and bonding the second flap to a second flap along a fold line formed between the first flap and a fourth flap after bending and bonding the fourth flap; And third folding means for bending the first flap upwardly by approximately 90 ° along a fold line formed between the first flap and the side panel after folding the second flap; The third flap is guided along a fold line formed between the fourth flap and the third flap by guiding a bent portion between the fourth flap and the third flap, and a bent portion between the fourth flap and the third flap is provided. And a pressing means for pressing down the third flap after the first flap is bent and bonding the fourth flap to the side panel.

In the forming apparatus having the above configuration, when the blank is fed from the sheet feeding section to the bending section, the first bending means is operated to bend the fourth flap to a position overlapping the upper surface of the third flap. And bonded to the third flap.

After bending and bonding the fourth flap, the second bending means and the third bending means are operated in order. By the operation of the second bending means, the second flap is bent upward along a fold line formed between the second flap and the first flap.

The third folding means bends the first flap upward by 90 ° along a fold line formed between the first flap and the side panel. When the first flap is bent, a bent portion between the third flap and the fourth flap is guided by a bending guide, and the bent portion contacts the upper surface of the side panel by the guide, and the third flap is moved. 4th
It is bent along the fold line formed between the flap and the flap.

After bending the first flap and the third flap, the third flap is pushed down by the operation of the pressing means, and the fourth flap is pressed against and adhered to the side panel. Corner bonding is formed at both ends of the upper surface of the side panel by the bonding.

The blank on which the corner posts are formed is fed into the box forming section, where the pair of side panels and the pair of side panels are bent upward by 90 °, and the first flap and the end face of the corner posts are formed. The bonding of the panels forms a rectangular packaging box.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2,
The packaging box forming apparatus according to the present invention includes a paper feeding unit 1, a bent portion 30 provided on the downstream side thereof,
And a box forming portion 100 provided on the downstream side of the box.

The sheet feeding section 1 has a table lifter 2, and a large number of blanks B shown in FIG. 20 are stacked on a lifting table 3 of the table lifter 2.

The blank B is placed on the lifting table 3 the lid panel P ₅ inner pair thereof is positioned on the upper and downstream side. Downstream of the stacked blanks B, a front guide 4 for positioning one side edge of the blanks B is provided, and a pair of edge aligning devices 5 is provided at both ends.

The edge aligning device 5 includes a pressing plate 6 and a cylinder 7
To press the edge of the blank B when the pressing plate 6 advances by the operation of the cylinder 7.

On the table lifter 2, there is provided a supply device 10 for supplying a large number of the stacked blanks B one by one from above to the bent portion 30 on the downstream side.

As shown in FIG. 3 and FIG.
0 is the top blank B of the stacked blanks B
And a pair of rail members 12 supporting both ends of the lower surface of the blank B sucked and transported to the upper position, and the blank B supported by the pair of rail members 12 on the downstream side. And a kicker device 13 for extruding the bent portion 30 toward the bent portion 30.

The suction transfer mechanism 11 has four suction cups 16 attached to a suction cup support 15 which is moved up and down by a cylinder 14, and a pair of end panels P ₂ of the blank B are moved by the four suction cups 16 when the suction cup support 15 is lowered. and adsorbing a pair of side panels P _4, the sucker support 15 in its attracted state
And the blank B is conveyed upward by suction.

Each of the pair of rail members 12 has an L-shape in which guide positions 12b for guiding both ends of the blank B are provided on the outer edge of a support plate 12a for supporting the lower surface of the blank B. The pair of rail members 12 are connected to the guide plate 12b.
Is supported so as to be swingable about a shaft 17 provided at the upper part of the shaft. A lever 18 is attached to the shaft 17, and a cylinder 19 is connected to a tip of the lever 18.

The pair of rail members 12 comprises a cylinder 19
Opens and closes around the shaft 17 by the operation of. In the open state, the support plate portion 12a of the rail member 12 is retracted to a position where the lifting movement of the blank B conveyed upward by the suction conveyance mechanism 11 is not hindered. Further, in the closed state, as shown by the solid line in FIG.
"a" are vertically opposed.

The kicker device 13 includes a pair of rail members 1.
2. A kicker 20 is provided on the upstream side edge of the blank B supported by
The upper end of the kicker 20 is swingably supported about a shaft 21, and a cylinder 23 is connected to the tip of a lever 22 connected to the shaft 21 to operate the cylinder 23. As a result, the kicker 20 is swung about the shaft 21 so that the kicker 20 is fed toward the bent portion 30 on the downstream side along the pair of rail members 12.

In the sheet feeding section 1 having the above configuration,
In a state where the pair of rail members 12 are opened as shown by a chain line in FIG.
Is lowered by the operation of the cylinder 14, and the suction cup 16 is lowered to a position where the suction cup 16 comes into contact with the uppermost blank B stacked. Then, when the suction cup 16 sucks the uppermost blank B, the suction cup support 15 is raised, and when the blank B is transported to the upper limit position, the pair of rail members 12 is closed. The suction of the blank B is released, and the falling blank B is received by the support plate portion 12a of the rail member 12.

The blank B is a pair of rail members 12
, The kicker 20 of the kicker device 13 is swung toward the downstream side by the operation of the cylinder 23, and the upstream side edge of the blank B supported by the pair of rail members 12 is pressed by the kicker 20. Then, the blank B is moved along the pair of rail members 12 toward the bent portion 30 on the downstream side.

In order to stably move the blank B moved along the pair of rail members 12 toward the bent portion 30, as shown in FIG. Is provided on the guide plate 4a.

A pair of upper and lower feed rollers 24 are provided on the moving path of the blank B from the paper feeding section 1 to the bending section 30 at intervals in the direction in which the blank B is transferred.

Lower roller 24a of a pair of feed rollers 24
Is rotated in the direction of the arrow, while the upper roller 24b is supported so as to be able to move up and down, and is pressed against the lower roller 24a by the elastic force of the spring 25. For this reason, the blank B from the paper feeding unit 1 is sent to the downstream bending unit 30 by the pair of upper and lower feed rollers 24.

As shown in FIG. 2, a moving path of the blank B from the sheet feeding section 1 to the folding section 30 is provided with a pair of coating devices 26.
Is provided. When the blank B is conveyed to the downstream side by the pair of feed rollers 24, the pair of coating devices 26 are provided with four third flaps F provided on the blank B.
_An adhesive is applied to the upper surface of each of the _three . B ₁ shown in FIG. 20 (I) shows its adhesive.

As shown in FIG. 1 and FIG.
Consists of a first bent portion 30a and a second bent portion 30b provided on the downstream side thereof.

FIGS. 5 to 9 show details of the first bent portion 30a. The first bent portion 30 a has a fourth flap F ₄ of the blank B fed by the pair of feed rollers 24.
The first flap support rails 31a and a second flap supporting rails 31b for supporting is spaced corresponding to dimension between both side edges of the end face panel P ₂ provided on the blank B to.

The first flap support rail 31a and the second flap support rail 31a
The flap support rail 31b is supported by a pair of left and right side edge guides 32 shown in FIG. Here, the pair of left and right side edge guides 32 has a length from the sheet feeding section 1 to the box forming section 100 as shown in FIG. The pair of side edge guides 32 extend from the first bent portion 30 a to the box forming portion 1.
00 when the blank B is fed, so as to guide the movement of the edge of the outer lid panel P ₃ provided on the blank B.

As shown in FIG. 6, a rib 33 is provided on the upper surface of the first flap support rail 31a. The rib 33 extends in the longitudinal direction of the first flap support rail 31a, and the upstream end thereof reaches the paper feed unit 1 and the paper feed unit 1
When the blank B is fed into the first bent portion 30a from, so as to guide the edges of the outer lid panel P ₃ of the blank B. Such a rib 33 is also provided on the upper surface of the second flap support rail 31b, but is omitted in the drawing.

As shown in FIG. 5, a positioning device 34 for positioning the blank B is provided between the downstream ends of the pair of second flap support rails 31b. The positioning device 34 is provided with a positioning piece 34b which is moved forward and backward by a cylinder 34a so as to be able to protrude and retract in the vertical direction with respect to the transport path of the blank B, and makes the positioning piece 34b protrude above the transport path of the blank B. Blank B
And so as to position the blank B is abutted against the third side edge of the flap F ₃ provided on the downstream side in the conveying direction of. In the positioning state of the blank B, the outer lid panel P
Reference numeral ₃ is arranged between the opposite ends of the first flap support rail 31a and the second flap support rail 31b.

At a position downstream of the pair of feed rollers 24,
The blank B conveyed and stopped by the pair of feed rollers 24 is positioned on the positioning piece 34b of the positioning device 34.
There is provided a moving device 35 that presses and moves to a position where it comes into contact with.

The moving device 35 is provided with a long rotating shaft 36 in a direction intersecting the conveying direction of the blank B on the conveying path of the blank B to rotatably support the rotating shaft 3.
6, a pair of arms 37 is attached, and the rear end of the L-shaped pressing rod 38 is attached to each arm 37. Also, the rotating shaft 3
A cylinder 40 is connected to the tip of a lever 39 attached to the cylinder 6, and the operation of the cylinder 40 causes the rotating shaft 36 to rotate in the forward and reverse directions of the set angle to swing the pressing rod 38 in the direction in which the blank B is conveyed. when the swing of the pressing lever 38, so that to push the third side edge of the flap F ₃ positioned on the upstream side in the conveying direction of the blank B.

Above the blank B positioned by the positioning device 34, each of the four fourth flaps F ₄ provided on the blank B overlaps the upper surface of each of the four third flaps F _3. Bend to the position,
A first bending device 41 for bonding to the upper surface of the third flap is provided.

As shown in FIGS. 7 and 8, the first folding device 41 pushes down the four third flaps F ₃ formed on the blank B, and moves the fourth flap F ₄ to the first position.
A pressing device 41a to erect upwardly bent substantially 90 ° fold by contact with the flap support rails 31a and second flap support rail 31b, a pair of outer surfaces of the fourth flap F ₄ upright state aligned in the transport direction of the blank B consisting of a flap folding device 41b to slightly tilt the press to the fourth flap F ₄ inwardly simultaneously.

The pressing unit 41a so that the pressing plate 42 provided above each of the third flap F ₃ is moved up and down by the cylinder 43, pushing down the third flap F ₃ during descent.

The flap bending device 41b is provided with a rotating shaft 44 extending in the transport direction of the blank B above both ends of the blank B positioned by the positioning device 34, rotatably supported, and stands on the rotating shaft 44. State fourth
It is attached to two sets of the pair of pressing arms 45 for pushing the flap F _4. A lever 46 is attached to the center of the rotation shaft 44 in the longitudinal direction, and the rotation shaft 44 is rotated in the forward and reverse directions by a set angle by the operation of a cylinder 47 connected to the lever 46 so that each pressing arm 45 is moved to the width of the blank B. is swung in the direction, so as to press the fourth outer surface of the flap F ₄ upright state when the swing in the width direction inwardly of the blank B of the pressing arm 45.

The first flap support rail 31a and the second flap support rail 31a
Below the blank B positioned on the flap support rail 31b, a center rail 48 and a pair of side rails 49 supporting the blank B pushed down by the pressing device 41a, and a blank B supported by each rail 48, 49 are provided. And a transfer device 50 for transferring the sheet from the second bent portion 30b to the box forming portion 100.

The center rail 48 has the first bent portion 30
a from the blank supply end to the blank discharge end of the second bent portion 30b.
Reference numeral 9 denotes a length from the blank supply end to the blank discharge end of the first bent portion 30a.

The conveying device 50 is composed of two chain conveyors provided between the center rail 48 and the pair of side rails 49, and the pressing claws 52 for pressing the upstream side edge of the blank B on the chains 51 of each chain conveyor. Is installed.

Now, the blank B
Is fed into the first bent portion 30a and stops, the pressing rod 38 of the moving device 35 swings from the chain line position to the solid line position in FIG. The rear edge in the transport direction is pressed.

At this time, the positioning piece 34b of the positioning device 34 faces the conveying path of the blank B, and the blank B is stopped by being pressed by the pressing rod 38 when the moving piece abuts on the positioning piece 34b and is positioned. .

[0053] When the blank B is positioned, pushing down the third flap F ₃ of the blank B the pressing plate 42 of the pressing device 41a is lowered by the actuation of the cylinder 43. Due to the depression, the fourth flap F ₄ is raised upward by contact with the first flap support rail 31a and the second flap support rail 31b.

[0054] As the blank B by pressing the pressing plate 42 is shown in FIG. 7, when lowered to a position supported by the center rail 48 and a pair of side rails 49, the fourth flap F ₄ is upwardly bent substantially 90 ° fold It is brought upright.

The pressing plate 42 rises immediately after the third flap F ₃ is pushed down, and when the pressing plate 42 rises to the upper limit position, the cylinder 47 of the flap bending device 41b operates to move the rotating shaft 44 in FIG. Rotate in the direction of the arrow. The pressing arm 45 swings inward in the width direction of the blank B by the rotation of the rotating shaft 44 in the direction of the arrow, and the fourth flap F ₄ in the upright state is pressed by the pressing arm, and as shown in FIG. And fall into the inclined state.

When the fourth flap F ₄ is held in an inclined state by the pressing of the pressing arm 45, the pressing plate 42 of the pressing device 41 a is moved up and down again by the operation of the cylinder 43, and the fourth flap in the inclined state is moved. F ₄ is pressed by the pressing plate 42 descending movement as shown in FIG. 9, it is bent to a position overlapping the third top flap F _3.

[0057] At this time, since the third top flap F ₃ which the adhesive b ₁ as shown in FIG. 20 (I) is applied, a fourth flap F ₄ is bonded to the third flap F ₃ .

The pressing arm 45 for holding the fourth flap F ₄ in an inclined state is provided by the fourth flap F ₄
Then, the cylinder 47 is returned to the standby position shown in FIG.

The fourth flap F ₄ is the third flap F ₄ .
₃ and the chain 51 of the transfer device 50 is
Then, the blank B is pressed by the push claws 52 and transported to the position of the second bent portion 30b.

From the first bent portion 30a to the second bent portion 30
b, as shown in FIG.
An adhesive application device 53 is provided. The coating device 53 in the fourth flap F ₄ of the blank B passes thereunder, so as to apply the adhesive to the upper surface of the fourth flap F _4. B ₂ shown in FIG. 20 (II) shows its adhesive.

FIGS. 10 to 14 show the second bent portion 30b.
The details are shown below. A blank pressing member 60 is provided above the center rail 48 in the second bent portion 30b.
The blank pressing member 60 has a rectangular cross section and has a length from the blank supply end to the blank discharge end of the second bent portion 30b.

In the second bent portion 30b, each of the four second flaps F ₂ of the blank B supported by the center rail 48 is formed by the second fold formed between the _first and second flaps F _1. a second folding device 61 along the eyes a ₂ put habit bend bent more than 90 ° upwards, when bending the second folding flap F _2, a pressing device 71 for pressing the first upper surface of the flap F _1, after bending the second folding flap F _2, a third folding device 81 for folding upwardly 90 ° along a first flap F ₁ to crease line a ₁ formed between the side panels P ₄ is provided .

Further, the first folding device 81 makes the first folding device.
Wrap F₁Is folded, the fourth flap F_FourAnd the second
3 flap F_ThreeGuide the bend between
F _ThreeTo the second flap F_TwoFold line a provided between
_ThreeArc-shaped bending guide 90 is provided to bend along
Have been. This arc-shaped bending guide 90 is
It is attached to both ends of the link holding member 60.

Further, a third flap F ₃ bent by the bending guide 90 is provided at the second bent portion 30b.
, And a pressing device 91 for pressing the fourth flap F ₄ bonded to the third flap F ₃ against the upper surface of the side panel P ₄ is provided.

As shown in FIGS. 10 and 11, the second bending device 61 is provided at a position corresponding to the lower surface of each of the four second flaps F ₂ of the blank B stopped at the second bent portion 30b. Have been. This second bending device 6
Reference numeral 1 denotes a rotatable shaft 62 which is provided below the blank B and rotatably supported in a direction in which the blank B is conveyed.
Are mounted with a pair of L-shaped arms 63. A cylinder 6 is attached to the tip of a lever 64 attached to the rotating shaft 62.
5 and the rotation of the rotating shaft 62
Setting angle forward or reverse direction to rotate to swing the L-arm 63 in the vertical direction, so that push up the second flap F ₂ during swinging of the upper direction of the L-arm 63.

[0066] holding device 71, a holding plate 72 provided on each top surface and corresponding positions of the first flap F ₁ of four formed blank B, a pair of links 73a which are arranged parallel to each holding plate 72 , 73b are rotatably connected to each other, the upper end of one link 73a is swingably supported about a pin 74, and the upper end of the other link 73b is rotatably supported. It is connected to a rotating shaft 75. Further, a pair of levers 76 are attached to both ends of the rotating shaft 75, and the rotating shaft 75 is rotated in the forward and reverse directions of the set angle by the operation of the cylinder 77 connected to the tip of each lever 76, so that the holding plate 72 the keeping the horizontal state is swung in the conveying direction of the blank B, the holding plate 72 so as to prevent the first lifting of the flap F ₁ at the stop position facing the upper surface of the first flap F _1.

Here, the pressing plate 72 is connected to the first flap F
In the stop position facing the _first top surface and the outer edge of the holding plate 72 faces the folding lines a ₂ between the first flap F ₁ and the second flap F _2, the second flap F ₂ is bent second folding Apparatus 61
When folded, the second flap F ₂ is bent using the outer edge of the holding plate 72 as a ruler.

The third bending device 81 includes the second bending device 6
1, a cylinder 82 rotatable around each of the rotation shafts 62 is provided, and a pressing arm 83 is connected to the cylinder 82. Further, a lever 84 is attached to the cylindrical body 82, and the cylinder 82 is rotated in the forward and reverse directions by a set angle by the operation of a cylinder 85 connected to the tip of the lever 84, so that the pressing arm 83 is raised to a substantially horizontal state. swung between the state of the time of swinging in a direction standing, so that upward bending approximately 90 ° by pressing the first flap F _1.

In the press device 91, four rods 94 are attached to the four corners of an elevating plate 93 which is moved up and down by a cylinder 92 so as to penetrate the elevating plate 93, and each rod 94 is supported so as to be able to move up and down. At the same time, the pressing bar 95 is fixed between the lower ends of the two rods 94 arranged in the front and rear direction of the blank B, and the pressing bar 95 is moved up and down by the operation of the cylinder 92. so that pushing down the F _3.

Now, when the blank B is sent from the first bent portion 30a to the second bent portion 30b by the pressing of the push claw 52 of the transporting device 50 and the blank B stops, FIG.
The rotation shaft 75 by the operation of the cylinder 77 of the pressing apparatus 71 shown in rotated, the presser plate 72 is swung toward the first upper surface of the flap F ₁ of the blank B while maintaining a horizontal state.

The holding plate 72 is made of the first flap F of the blank B.
Stopping as shown in FIG. 11 swings to a position opposed _first top surface and the rotating shaft 62 is rotated by the operation of the cylinder 65 of the second folding device 61, L-shaped arm 63 upward Rocked. The swing of the L-shaped arm 63 causes the second flap F ₂ of the blank B to move to the L-shaped arm 6.
3 and the pressing plate 72 of the pressing device 71 is used as a ruler.
Bent approximately 90 ° folding upwards along the second folding lines a ₂ provided between the first flap F _1.

As shown in FIG. 12 (I), when the second flap F _{2 is} bent by approximately 90 °, the holding plate 72 of the holding device 71 is actuated by the cylinder 77 to move the second flap F _2.
Swings away from the upper surface of the.

After the holding plate 72 is released, the second bending device 61
The L-shaped arm 63 further swings in the same direction, and the swing causes the second flap F ₂ to move as shown in FIG.
It is bent by 0 ° or more, and a portion corresponding to the fold line a ₂ between the second flap F ₂ and the first flap F ₁ is bent.

The L-shaped arm 63 is connected to the second flap F ₂ in FIG.
When bent at a predetermined angle as shown in FIG. 2 (II), the cylinder 65 is returned to the standby position shown in FIG.

When the L-shaped arm 63 returns to the standby position, the third arm
Pressure arm 83 of folding device 81 is swung upward by the operation of the cylinder 85, the swing of the pressing arm 83 first flap F ₁ is pressed, the side panel P
₄ along the first folding lines a ₁ provided between the 13
It is bent upward as shown in (I).

At this time, the bent portion of the continuous portion of the third flap F ₃ and the fourth flap F ₄ moves while being guided by the bending guide 90, and the bent portion contacts the side surface of the blank pressing member 60. When the third flap F ₃ starts to move, FIG. 13 (II)
As shown, the third folding lines a with bent along _three, third flap F ₃ and the fourth bent portion side panel P ₄ between the flaps F ₄ which is formed between the second flap F ₂
Abuts the upper surface of the

The first flap F ₁ is bent upward by the swing of the pressing arm 83, and when the first flap F ₁ is bent by approximately 90 ° as shown in FIG. 14, the pressing bar 95 of the pressing device 91 is turned on. presses the third top flap F ₃ is lowered by the actuation of the cylinder 92, presses the fourth flap F ₄ on the upper surface of the side panels P _4.

At this time, the fourth flap F ₄ is
Since the adhesive b ₂ as shown in (II) is previously applied, the fourth flap F ₄ is adhered to the side panels P _4, by the adhesive, as shown in FIG. 20 (III), the side panel P _Four corner pillars C having triangular cavities are formed at both ends of the upper surface of ₄ .

After forming the corner support C, the third bending device 8
By the operation of the cylinder 85, the first pressing arm 83 swings in the falling direction to return to a substantially horizontal state, and the pressing bar 95 of the press device 91 rises.

When the pressing bar 95 rises to the upper limit position and stops, the pressing claws 52 of the transfer device 50 move to transfer the blank B toward the box forming section 100.

As shown in FIG. 2, a coating device 96 is provided on the transport path of the blank B from the second bent portion 30b to the box forming portion 100. The application device 96 is adapted to apply an adhesive to the surface of the first flap F ₁ forming the corner support C. B ₃ shown in FIG. 20 (III) shows its adhesive.

FIGS. 15 to 19 show details of the box forming section 100. FIG. Above the blank B to be stopped sent to the box forming section 100, device 101 depressed depressing the blank B is provided to press the bottom panel P ₁ of the blank B. Depressing device 101, a core 102 formed in accordance with the internal dimension of the packaging box is elevated by the cylinder 103, and to press the bottom panel P ₁ of the blank B in the core 103 during descent.

[0083] Below the blank B to be stopped in the box-defining portion 100, the position corresponding to the pair of side panels bent guide 104 at positions corresponding to the pair of side panels P _4, a pair of end faces the panel P ₂ Are provided with a pair of end panel bending guides 105.

[0084] a pair of side panels folding guide 104 has a generally horizontal support surface 104a for supporting the pair of side panels P ₄ of the blank B at the top, to form an inclined surface 104b to the inner end of the support surface 102a A vertical surface 104c is formed at the lower end of the inclined surface 104b.

The pair of side panel bending guides 104
When the blank B is depressed, and upwardly so bent approximately 90 ° a pair of side panels P _4.

On the other hand, a pair of end panel bending guides 10
5 has a substantially horizontal support surface 105a,
05a is provided with an inclined surface 105b at the inner end thereof.
A vertical surface 105c is formed at the lower end of 5b. The support surfaces 105a of the pair of end panel bending guides 105 are lower than the support surfaces 104a of the pair of side panel bending guides 104.

The pair of end panel bending guides 105 are moved forward and backward by the cylinder 106, and at the retreat stop position, the pair of end panel P ₂ of the blank B to be pushed down.
Is bent upward. Further, the pair of end face panel bending guides 105 presses the end face panel P ₂ bent upward when moving forward, and brings the end face panel P ₂ into a substantially vertical standing state.

The pair of side panel bending guides 104
On each of the left and right sides, there is provided a panel pressing device 110 which presses a pair of side panels P ₄ which are in an upright state to prevent the side panels P ₄ from falling outward.
The panel pressing device 110 moves the pressing plate 112 forward and backward by a cylinder 111.

As shown in FIGS. 15 and 16, the blank B which is pushed down to the lower limit position by the pushing-down device 101 is supported by the upper table 121 of the lifting table 120 provided below. Lifting platform 120 is moved up and down by the cylinder 122, is adapted to support the bottom panel P ₁ of the blank B in the raised rest position.

The elevating table 120 has a box shape, and has a plurality of suction pads 123 provided therein. The suction pad 123 is moved up and down by a cylinder 124. When the suction pad 123 rises, it faces a hole 125 provided in the table 121, and the bottom panel P _{1 of the} blank B supported by the table 121.
Is to be adsorbed.

At the left and right sides of the elevating platform 120 at the lowering position, a discharge rail 130 for receiving the lowering packaging box A supported by the elevating platform 120 during the lowering, and a packaging rail A received by the discharging rail 130 are disposed at the discharging rail 130. And a discharge conveyor 131 that is moved along.

Now, when the blank B on which the corner support C is formed is sent from the second bent portion 30b to the box forming portion 100 by the operation of the transfer device 50 and stopped, the core 102 of the pushing-down device 101 operates the cylinder 103. lowered by pushing down the bottom panel P ₁ of the blank B.

At this time, the end surface panel bending guide 105
Is in the retracted position. The table 121 is stopped at the upper limit position.

The pair of side panels P ₄ of the blank B pressed down by the pressing of the core 102 are bent upward by contact with the pair of side panel bending guides 104, and the pair of end panels P ₂ are slightly delayed. It is bent upward by contact with a pair of end face panel bending guides 105.

When the blank B is lowered to a position supported by the upper surface of the table 121, as shown in FIG.
A pair of side panels P ₄ is bent approximately 90 ° fold becomes vertical state, whereas, a pair of end faces the panel P ₂ is an inclined state to fall slightly outwardly from the vertical state.

[0096] When the blank B is lowered to the lower limit position is supported by the table 121, the pressing plate 112 of the panel pressing device 110 presses the pair of side panels P ₄ and advanced by actuation of the cylinder 111, falling outwardly To prevent

[0097] After forward stop of the pressing plate 112, a pair of end faces panel folding guide 105 is advanced, the pair of end faces the panel P ₂ is pressed by the advancement as shown in FIG. 19, a pair of side panels P ₄ Are pressed against a pair of corner posts C provided at both ends of the base.

[0098] At this time, since the pre-adhesive b ₃ is coated on the first flap F ₁ of a pair of corner posts C, a pair of end faces the panel P ₂ is adhered to the corner posts C, FIG. 21
Is formed.

[0099] After the formation of the packaging box A, and suction pad 123 is raised by the operation of the cylinder 124, the bottom panel P ₁ of the packing box A adsorbed, that after the adsorption, the core 102 of the depressing device 101 is increased. Further, the pressing plate 112 of the panel pressing device 110 retreats, and the pair of end panel bending guides 105 retreats by the operation of the cylinder 106.

Here, the core 102 of the pressing device 101
There upon increases, the bottom panel P ₁ of the package box A is adsorbed by the suction pad 123, package box A is prevented from rising with the core 102.

After the pair of end panel bending guides 105 retreat, the elevator 120 is lowered by the operation of the cylinder 122. When the elevator 120 descends near the lower limit position,
The packaging box A is supported by the discharge rail 130. At this time,
The suction pad 123 releases the suction of the packaging box A and is held at the lowered position.
The delivery of the packaging box A is performed smoothly.

The packaging box A supported by the discharge rail 130 is discharged by the discharge conveyor 131.

In the discharged packaging box A, contents such as bags filled with liquid are stored in the next step, and then the inner lid panel P ₅ and the outer lid panel P ₃ are folded in.
The upper surface is sealed appropriately.

[0104]

As described above, according to the present invention, by transporting a flat blank from the paper feeding section to the downstream side, a packaging box having corner pillars at four inner corners can be automatically and efficiently assembled. This has a great effect on labor saving and labor saving.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a packaging box forming apparatus according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a front view showing an upper part of a paper feeding unit of the packaging box forming apparatus shown in FIG. 1;

FIG. 4 is a right side view of FIG.

5 is a partially cutaway front view showing a first bent portion of the packaging box forming apparatus shown in FIG.

FIG. 6 is a longitudinal sectional side view of FIG. 5;

FIG. 7 is a cross-sectional view showing a state where the fourth flap of the blank is being bent.

FIG. 8 is a sectional view showing a state where the fourth flap shown in FIG. 7 is further bent;

9 is a sectional view showing a state in which the fourth flap shown in FIG. 7 is completely bent and adhered to the third flap.

10 is a partially cutaway front view showing a second bent portion of the packaging box forming apparatus shown in FIG.

11 is a longitudinal sectional side view of FIG.

12 (I) and (II) are cross-sectional views showing stepwise formation states of a corner support.

13 (I) and (II) are cross-sectional views showing stepwise formation states of corner posts.

FIG. 14 is a cross-sectional view showing a state in which a corner support is completely formed.

FIG. 15 is a vertical sectional front view showing a box forming part of the packaging box forming apparatus shown in FIG. 1;

16 is a longitudinal sectional side view of FIG.

FIG. 17 is a plan view of FIG.

FIG. 18 is a longitudinal sectional front view showing a process of forming a packaging box;

FIG. 19 is a plan view showing a state where a packaging box is formed.

FIGS. 20 (I) to (IV) are perspective views showing steps of forming a packaging box.

FIG. 21 is a partially cutaway perspective view of a packaging box.

[Explanation of symbols]

P ₁ bottom panel P ₂ end face panel P ₃ outer lid panel P ₄ side panel F ₁ first flap F ₂ second flap F ₃ third flap F ₄ fourth flap a ₁ ~a ₄ fold line C corner post 1 paper feed Part 30a First bending part 30b Second bending part 41 First bending device 61 Second bending device 81 Third bending device 90 Bending guide 91 Press device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E075 BA07 CA01 DA03 DA04 DA05 DA15 DA23 DA32 DC18 DC28 DC44 DD02 DD32 DD43 GA01 GA03 GA04

Claims (1)

[Claims] 1. A pair of end panels are connected to both ends of a bottom panel, and first to fourth flaps are provided at both ends of the pair of side panels connected to both sides of the bottom panel via fold lines. Blanks that are successively provided are used as a material for forming a packaging box, and the blank is fed by stacking a large number of blanks and bending the first to fourth flaps of the blanks fed from the paper feeding unit. A bent portion forming a corner support at both ends of each side panel, and a pair of end surface panels and a pair of side panels of the blank sent from the bent portion are bent upward by 90 ° to form a rectangular packaging box. A box forming part to be formed, wherein the bent part bends and bonds the fourth flap to a position overlapping the upper surface of the third flap;
Second bending means for bending the second flap upward along a fold line formed between the second flap and the first flap after bending and bonding the flap; and bending the first flap to the side after bending the second flap. Third bending means for bending upward by approximately 90 ° along a fold line formed between the panel and the panel, and guiding a bent portion between the fourth flap and the third flap when bending the first flap. A bending guide for bending the third flap along a fold line formed between the third flap and the second flap, and for bringing a bent portion between the fourth flap and the third flap into contact with the side panel; and a first flap. Press means for pressing down the third flap after the bending of the third flap to bond the fourth flap to the side panel.