JPH0734802Y2 - Carton forming equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton forming apparatus, and in particular, a carton (box) is formed by bending and adhering an upper flap (lid) and a seam flap on a carton having an article on the bottom surface. The present invention relates to a carton forming apparatus.

[0002]

2. Description of the Related Art An article is placed on the bottom surface of a sheet-shaped carton blank, and the seam flaps and upper flaps (lids) connected to both sides of the bottom surface portion are placed upright from the side surfaces. A carton forming device for bending and adhering the flap and the upper flap is conventionally known (No. 60-150028, Shokai 61-26001).
issue).

[0003]

[Problems to be solved by the device] The former
When the contents are rectangular parallelepiped with a right angled part like (No. 8), the seam flap and the side part can be bent accurately using this contents as a guide, but the contents and the carton like a bottle can be bent. If there is a space between the seam flap and the seam flap, the side parts will be pushed and tilted when folded, so the guide will be placed inside the carton as in the latter device (No. 61-26001). It was necessary to arrange members, etc.

However, when the guide member or the like is placed inside the carton, there are drawbacks that the structure of the device becomes complicated and the cost becomes high.

The present invention has been made to eliminate the above-mentioned drawbacks, and provides a carton forming apparatus capable of accurately bending a side portion of a carton and a seam flap with a simple structure.

[0006]

A carton forming apparatus according to the present invention comprises a bottom portion on which an article is placed and two bottom portions which are continuously provided on both sides of the bottom portion and which are bent substantially at right angles to the bottom portion. A side part, an upper flap continuous to one side part, and a carton provided with a seam flap continuous to the other side part are extruded from the side part side having the seam flap by the extruding means to the other side part side, During the movement, the upper flap is bent while interfering with the upper flap folding means, and the seam flap folding means is moved back and forth toward the carton to bend the seam flap and the side surface portion at a substantially right angle. Yes , especially the above seam
Adsorb the side of the carton below the wrap folding means.
The provided Chakushudan, when folding the seam flap by the seam flap folding means, and by the suction means by suction side portion of the sheet <br/> Mufurappu side so that to prevent the side portion from falling It is a thing.

[0007]

In the carton forming apparatus according to the present invention, when the seam flap is pressed and bent, since the side surface portion is attracted by the suction means, the side surface portion is not likely to be deformed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.
FIG. 1 is a side view of a carton forming apparatus according to an embodiment of the present invention. A sheet-like carton blank 2 formed into a carton by this apparatus has an article 4 such as a bottle placed thereon as shown in FIG. Bottom surface 2a, side surfaces 2b and 2c on both sides thereof, an upper flap (lid) 2d continuous to one side surface (right side in FIG. 2), and another side surface (right side in FIG. 2) 2c. And a seam flap 2e that is continuous with the.

In FIG. 1, reference numeral 6 denotes a lifting table which vertically moves up and down. When the lifting table 6 is lifted up, the sheet-like carton blank 2 is supplied in a state of being glued to the end 2f of the upper flap 2d, and is placed on the bottom surface 2a. The article 4 is placed on. The carton blank 2 and the article 4 are sandwiched between a pusher (not shown) provided above and the lifting table 6 to descend, and during the descending, the bottom part 2
Side portions 2b and 2c on both sides of a are bending members (not shown).
It interferes with and is bent almost at a right angle.

A pair of horizontal rods 8 are provided with a fixed bearing 10 at a position slightly lower than the position where the lifting table 6 is most lowered.
It is reciprocally supported by. One end of each of these horizontal rods 8 (right side in FIG. 1) is connected to an arm 14 via a cylinder 12, and the arm 8 swings by the rotation of a cam 16 so that the rod 8 advances and retracts. Move.

A case pushing plate 18 for pushing the carton 2 forward (to the left in FIG. 1) in which the both side portions 2b and 2c are bent at a substantially right angle is provided at an intermediate portion of these horizontal rods 8. (See FIG. 3 and FIG. 4 showing enlarged main parts). The case pressing plate 18 is fixed to the front surface of a bracket 22 that is fixed to both horizontal rods 8 and is attached to a mounting block 20 that moves back and forth integrally.

At the upper end of the bracket 22 on the front portion 22a side, a side surface portion 2C of the carton 2 on the seam wrap 2e side is formed.
A suction cup 24 for adsorbing the is provided. The suction cup 24 is of a bellows type and normally protrudes forward from the front surface of the case pushing plate 18 and is pushed to the side face 2c of the carton when the case pushing plate 18 moves forward and contacts the side face 2c of the carton. Then, the case pushing plate 18 is retracted to the same plane as the front surface.

A cylinder 26 for folding the seam flap is fixed to the upper end of a rearwardly extending L-shaped portion 22b of the bracket 22. A seam flap folding member 28 is attached to the rod 26 a of the seam flap folding cylinder 26. The seam flap folding member 28 has an arc-shaped guide 2 extending upward.
And 8a, and this guide the lower end of the horizontal portion 28b and the right angle of which is formed by the support portion 28c of the horizontal portion is fixed folded portion 28d, in the support portion 28 c, and is swingably supported by a spring 28e And a claw 28f.

The height of the seam flap folding member 28 can be adjusted according to the size of the carton 2, and the corner of the folding portion 28d has a fold curve 2g (between the seam flap 2e and the side surface portion 2c). The height is adjusted so as to correspond to the position (see FIG. 2).

An arc-shaped upper flap folding guide 30 is provided above the moving direction of the carton 2 pushed by the case pushing plate 18 (see FIG. 3), and the carton 2 can be moved. Accordingly, the upright upper flap 2d is gradually bent. The carton 2 in FIG. 3 shows a state in which the upper flap 2d is bent.

As shown in FIG. 1, a slide unit 32 is fixed to the tips of the two horizontal rods 8 and is fitted to a fixed guide rod 34 below, and as the horizontal rods 8 move forward and backward. Move forward and backward. This slide unit 3
A pair of swingable push bars 36 are provided above the position 2. These push bars 36 are normally held in a slightly upward position as shown in FIG. 1, and can be swung to a horizontal position when pushed from the right side of the drawing.

Next, the operation of the carton forming apparatus will be described. First, the carton blank 2 is glued as shown in FIG. 2 and supplied to the lifting table 6 which is rising, and the article 4 such as a bottle is placed on the bottom surface 2a.
The non-glued portion 2h of the upper flap 2d end 2f is a space into which the claw 28f of the seam flap folding member 28 is inserted.

As described above, the side surfaces 2b and 2c are bent at a substantially right angle as the lifting table 6 descends and reach the position (A) shown in FIGS. 1 and 3.

Next, the horizontal rod 8 is caused by the rotation of the cam 16.
The case pushing plate 18 moves forward by pushing forward, pushing the carton 2 leftward in the drawing. This pushing plate 18
The vacuum acts almost simultaneously with the start of the forward movement of the suction cup 24
Adsorbs on the side surface 2c of the carton. Further, following the start of the forward movement of the pushing plate 18, the cylinder 26 operates to advance the seam flap folding member 28 to start the folding of the seam flap 2e. At the time of this folding, sucker 2
Since 4 is attached to the side surface portion 2c, the side surface portion 2c can be bent at an accurate right angle without falling inside the carton 2.

Even after the folding of the seam flap 2e is completed, the cylinder 26 remains in the operating state, and the seam flap folding member 28 holds the folded seam flap 2e and continues to advance together with the case pushing plate 18. Meanwhile, since the carton 2 is moving by the case pushing plate 18, the upper flap 2d is bent by the upper flap folding guide 30. Upper flap 2d
The cylinder 26 causes the seam flap folding member 28 to start retracting immediately before being bent and completely overlapped on the seam flap 2e. Seam flap folding member 2
After 8 is pulled out from between the upper flap 2d and the seam flap 2e, the upper flap 2d is pressed against the seam flap 2e and completely crimped.

The upper flap 2d of the carton 2 as described above
Is pressed against the seam flap 2e, the carton 2
Moves from position (A) to position (B) in FIG. After that, the horizontal rod 8 and the case pushing plate 18, which is integral with the horizontal rod 8, the seam flap folding member 28, the push bar 36, and the like retreat and return to the position shown in FIG. At this time, the swingable push bar 36 is laid down horizontally by the carton 2 in the (B) position and passes under the carton 2.

When the next carton 2 is lowered to the position (A) by the lifting table 6, the horizontal rod 8 and the parts integrated with the horizontal rod 8 again perform the same operation to move the carton 2 from the position (A). Move to (B).
Further, the carton 2 which has been carried to the position (B) by the previous operation is pushed by the push bar 36 and sent to the next step.

When folding the seam flap in this way,
Since the side surface portion 2c is sucked by the suction cup 24, even if there is a space inside the carton 2, the side surface portion 2c does not fall and the seam flap 2e can be accurately folded. The suction cup 24 does not necessarily have to be a bellows type, and may be any one that can be sucked and prevented from falling when the seam flap is folded. The member for bending the upper flap 2d is not limited to the fixed guide, but may be a rotating body such as a free roller.

[0024]

As described above, according to the present invention, the carton can be molded accurately regardless of the shape of the articles accommodated in the carton, and the strength and folding line of the carton itself can be achieved. Reliable molding is possible without being affected by variations in the strength.

[Brief description of drawings]

FIG. 1 is a side view of a carton forming apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a carton blank formed into a carton.

FIG. 3 is an enlarged view showing a main part of FIG.

FIG. 4 is a diagram showing the left half of the front surface of FIG. 3;

[Explanation of symbols]

 2 Carton 2a Carton bottom 2b Carton side 2c Carton side 2d Carton top flap 2e Carton seam flap 18 Extrusion means 24 Adsorption means 28 Seam flap folding means 30 Top flap folding means

Claims (1)

[Scope of utility model registration request] 1. A bottom portion on which an article is placed and a bottom portion which is continuously provided on both sides of the bottom portion and which is bent substantially at right angles to the bottom portion.
A side surface of the sheet and an upper flap continuous to one side surface,
A carton provided with a seam flap continuous to the other side surface part is extruded by the extruding means from the side surface part side having the seam flap to the other side surface part side, and the upper flap is interfered with the upper flap folding means during its movement. converting mechanism bending, in a carton forming apparatus bending substantially at a right angle between the seam flap and side portions by advancing and retreating the seam flap folding means towards the carton, the upper
Note the side of the carton below the seam flap folding means.
Adsorption means for adsorbing is provided, and when the seam flap is bent by the seam flap folding means, the suction means
Carton forming device comprising a Turkey to prevent the side portions to the suction side of the seam flap side fall by.