JPH06312721A - Taking-out device of carton blank - Google Patents

Abstract

PURPOSE:To prevent a carton blank from reversely folding, by sucking the upper face of a carton blank in a carton magazine by a main suction means and sucking a part of the lower face side projecting more outward than the upper face of the carton blank by an auxiliary sucking means and taking out the carton blank. CONSTITUTION:A main sucker 52 sucking the upper face 58a of a folded carton blank 58 and an auxiliary sucker 54 sucking the flap 58i projected from the upper face 58 on the lower face side of the carton blank 58 are respectively arranged in a taking-out device of carton blank. The main sucker 52 and the auxiliary sucker 5 which are lowered by a lifting cylinder 8 sucks the upper face of a carton blank 58 and also the flap 58i by compressing a coil spring 56 respectively. When these suckers 52, 54 are raised, the auxiliary sucker 54 is pushed down to project downward by a coil spring 56 and the gap between the upper face and the lower face of the carton blank 58 is widened so as to be of a half-assembled box. In this way, a carton blank 58 is prevented from reversely folding and shaped to form a box.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton blank unloading device, and more particularly to a carton blank unloading a carton blank housed in a vertical carton magazine by adsorbing the carton blank from above by a suction means in a substantially vertical direction. The present invention relates to a take-out device.

[0002]

2. Description of the Related Art A number of flatly folded carton blanks are stacked and held in a vertical carton magazine, and a suction means (sucker) arranged above is moved up and down to adsorb the carton blanks and lifted up. A device for taking out carton blanks for taking out one by one has been conventionally known (JP-A-4-31220).

In the carton blank take-out device described in the above publication, a plurality of suction cups 22 mounted on a mounting plate 24 are supported by a lifting cylinder 8 so that they can be lifted and lowered.
Further, the lifting cylinder 8 is attached to the horizontally moving cylinder 4 so as to be movable in the horizontal direction, and a small cylinder 28 for inclining the mounting plate 24 of the suction cup 22.
First, the suction cup 22 is lowered from above the carton hopper (carton magazine) 38 by the lifting cylinder 8 to adsorb the upper surface of the carton blank 36, and then the suction cup 22 is lifted to remove it from the carton magazine 38. The carton blanks 36 are taken out, then horizontally moved by the horizontal moving cylinder 4 in the direction of the carry-out conveyor 46, and during the horizontal movement, the small cylinder 28 moves the front end of the carton blank 36 downward. And the tip of the carton blank 36 is brought into contact with the stopper 44 to open the carton blank 36.

[0004]

In the conventional carton blank take-out device having the above-mentioned structure, the suction surface of the carton blank 36 is sucked up by the suction cup 22 to move the carton blank 36 to a predetermined position. In the case of a large carton blank 36, the upper surface is picked up and opened while moving up, that is, when only the upper surface is sucked and lifted, the lower surface hangs down and opens in a rectangular tube shape. In doing so, there is a risk that the carton blanks 36 stacked in the carton magazine 38 may interfere with each other and the carton blanks 36 may be displaced. In order to avoid such a situation, there has been a problem that it is necessary to lengthen the stroke of the sucker lifting / lowering cylinder, or to reduce the number of cartons stacked in the carton magazine. Also, if the upper and lower surfaces of the carton blank adsorbed by the suction cups are in close contact with each other and the inside is in a vacuum state, the upper and lower surfaces do not open and bend in the same direction, so-called reverse bending. There was a risk that it would be.

The present invention has been made in order to eliminate the above-mentioned drawbacks. After taking out the carton blank from the carton magazine, the carton blank is not completely opened until it is moved to the semi-opened state. SUMMARY OF THE INVENTION It is an object of the present invention to provide a carton take-out device that does not interfere with other carton blanks in a carton magazine and can always be opened without being folded backward.

[0006]

A carton blank take-out device according to the present invention comprises a vertical carton magazine for stacking and holding flatly folded carton blanks, and a main suction means arranged above the carton magazine. An elevating means for elevating and lowering the main adsorbing means, and an auxiliary adsorbing means for elevating and lowering together with the main adsorbing means by the elevating and lowering means,
The auxiliary suction means is supported, and the auxiliary suction means is provided with a telescopic means for urging the auxiliary suction means downward in a free state, and the main suction means and the auxiliary suction means are lowered by the operation of the elevating means. Then, the main adsorption means adsorbs the upper surface of the carton blank in the carton magazine, and the auxiliary adsorption means adsorbs a part of the lower surface side of the carton blank, which is exposed to the outside of the upper surface of the carton blank. The carton blank is taken out by raising.

[0007]

In the above-mentioned carton blank take-out device, when the carton blank is adsorbed by the main adsorbing means and the auxiliary adsorbing means, the expanding and contracting means supporting the auxiliary adsorbing means is compressed to have a height substantially the same as that of the main adsorbing means. Then the carton blank is adsorbed. After that, when these suction means are raised, the expansion and contraction means supporting the auxiliary suction means are stretched, and the lower surface of the carton blank that has been sucked by the auxiliary suction means is pushed downward with respect to the upper surface. Put it in a half-opened state.

[0008]

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a front view of a main part of a carton blank unloading apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of the entire carton blank unloading apparatus. A pair of horizontal movement cylinders 4 are fixed between the front and rear (right and left in FIG. 2) frames 2,
An elevating cylinder 8 is vertically mounted on the horizontal moving cylinder 4 via a mounting plate 6. A suction mechanism (generally indicated by reference numeral 12) is connected to the tip of the operating rod 8a of the lifting cylinder 8 via a horizontal fixed plate 10 and is lifted by the operation of the lifting cylinder 8. Two guide rods 14 are upright and fixed on a horizontal fixing plate 10, and
It is slidably supported through the upper slide bush 16 and guides the lifting and lowering of the suction mechanism 12.

A cylinder 18 is swingably attached via a pin 20 to the central portion of the lower surface of the fixed plate 10.
The operating plate 18a of the cylinder 18 has an inclined plate 22
Are rotatably connected to each other via a pin 24. A connecting member 26 is provided on one end (right side of FIG. 1) of the inclined plate 22.
Is fixed and is connected to a bracket 28 fixed to the lower surface of the fixed plate 10 via a fulcrum pin 30, and the inclined plate 22 is inclined around the fulcrum pin 30 by the operation of the cylinder 18. A vertical positioning rod 32 is fixed to the lower surface of the fixed plate 10 at the position opposite to the bracket 28 (left side in FIG. 1), and a stopper member 34 is attached to the tip of the vertical positioning rod 32. The inclined plate 22 is positioned so as to be horizontal by hitting the upper surface of the inclined plate 22 when being raised by 18.

A pair of downward brackets 36 are fixed to the lower surface of the inclined plate 22, and the suction cup mounting body 4 is attached to these brackets 36 via a fulcrum pin 38 and a connecting member 40.
2 are rotatably connected. Two tilting cylinders 44 for tilting the suction cup mounting body 42 are connected between the tilting plate 22 and the suction cup mounting body 42, and the suction cup mounting body 42 is operated by the operation of the tilting cylinders 44.
Are inclined around the fulcrum pin 38 of the downward bracket 36.

A positioning cylinder 46 is vertically fixed between two tilting cylinders 44 connected to the lower surface of the tilting plate 22, and a stopper member 48 is attached to the tip of an operating rod 46a thereof. On the other hand, the sucker mount 42
On the upper surface of the stopper member 4 of the positioning cylinder 46.
8, a stopper pin 50 is fixed at a position facing the position 8, and the stopper member 48 of the positioning cylinder 46 is fixed.
The inclination angle of the suction cup attachment body 42 is regulated by hitting the tip of the.

A plurality of suction cups 52 and 54 are attached to the lower surface of the suction cup attachment body 42. In this embodiment, twelve main suction cups 52 as main suction means are arranged in three columns (see FIG. 3), four rows in each row, and twelve main suction cups 52 as auxiliary suction means 54. One is provided outside. The main suction cup 52 and the auxiliary suction cup 54 are connected to a vacuum source (not shown), and the carton blank 58 is sucked by applying a vacuum,
Also, the vacuum is shut off and the carton blank 58
Is designed to be released. The auxiliary suction cup 54 is supported by the suction cup attachment body 42 via a coil spring 56,
In a free state where the coil spring 56 does not come into contact with the carton blank 58, the coil spring 56 extends, and the suction surface 54a thereof projects below the suction surface 52a of each of the main suction cups 52. 56 is compressed, and its suction surface 54a is relatively raised to the height of the suction surface 52a of each main suction cup 52.

The lifting cylinder 8 is moved to the position shown by the solid line in FIG. 2 (left side in the drawing) by the operation of the horizontal moving cylinder 4.
To a position indicated by a chain double-dashed line (on the right side of the figure), and below the retracted position indicated by a solid line, a carton magazine 60 for stacking and holding a plurality of carton blanks 58 folded in a sheet shape. Is provided.
In the present embodiment, the carton magazine 60 uses the downstream end of the inclined conveyor 62 that advances intermittently, although the detailed description is omitted, and the carton blank 58 uses the inclined conveyor 62. It is pushed by a pressing member attached to and is moved forward, and when stopped at the illustrated position, it is sucked by the main suction cup 52 and the auxiliary suction cup 54 and taken out one by one.

A guide member 64 against which the front end of the carton blank 58 adsorbed by the suction cup 52 and advancing collides slightly below the forward position of the elevating cylinder 8 (shown by the two-dot chain line on the right side of FIG. 2). Are arranged. Further, below that, a carry-out conveyor (not shown) is arranged. The carry-out conveyor holds a carton blank 58, which is erected in a rectangular tube shape, between front and rear holding claws and conveys it while maintaining the erected state.

Next, the operation of the carton blank take-out device having the above construction will be described. First, the shape of the carton blank 58 taken out from the carton magazine 60 and opened by this device will be described with reference to FIGS. 5 and 6. The upper surface 5 in a state (FIG. 5) in which the portion 58a which is the upper surface in the opened state (FIG. 6) and the portion 58b which is one side surface (referred to as the first side surface) are folded
8X, and the portion 58c that is the lower surface in the opened state and the portion 58d that is the other side surface (second side surface) become the lower surface 58Y in the folded state. Also, the lower surface 58
On both sides of c, lids 58e, 58 for sealing the opening later are provided.
f are continuously provided, and flaps 58g, 58h, 58i, 58j are provided on both sides of the both side surfaces 58b, 58d, respectively, and in the folded state, the first side surface 5 is formed.
The flaps 58g and 58h on both sides of 8b are the lower lid 58.
The flaps 58i and 58j of the second side surface 58d overlap with the top surface 58a of the second side surface 58d, and the flaps 58i and 58j of the second side surface 58d overlap with the upper surface 58a.

As a state at the time of starting the operation, first, at a position where the whole including the lifting cylinder 8 is retracted above the carton magazine 60 by the horizontal moving cylinder 4, and
The suction mechanism 12 is raised by the lifting cylinder 8. At this position, as shown in FIG. 3, the positioning cylinder 46 raises the stopper member 48,
The stopper member 48 and the lower stopper pin 50 are separated from each other, and the two tilting cylinders 44 are contracted so that the front side (right side in FIG. 3) of the suction cup mounting body 42 is tilted upward. This inclination substantially matches the inclination of the carton magazine 60.

Next, the lifting cylinder 8 is operated to lower the entire suction mechanism 12, and the main suction cup 52 and the auxiliary suction cup 5 are moved.
4, the top carton blank 58 in the carton magazine 60 is adsorbed. Of these suckers 52, 54,
The main suction cup 52 is the folded carton blank 58.
(See FIG. 5) Adsorbs the upper surface 58a, and the auxiliary suction cup 54
One of the flaps 58i of the second side surface 58d overlapping the lower side of the upper surface 58a is adsorbed. The auxiliary suction cup 54 is supported by the coil spring 56, and when it rises and is in a free state, it projects downward from the main suction cup 52, but when it descends and comes into contact with the carton blank 58, the coil spring 56 is released. It is bent and pushed up to almost the same height as the main suction cup 52 to adsorb the flap 58i. A sensor (not shown) is provided in the vacuum passage that connects the suction cups 52, 54 and the vacuum source, and the lifting cylinder 8 is turned on and off by a signal from the sensor. That is, the suction cups 52 and 54 descend and come into contact with the carton blank 58, and when the vacuum acts, this sensor detects and stops the lifting cylinder 8.

Subsequently, the entire suction mechanism 12 is lifted by the lifting cylinder 8 to take out the carton blank 58 from the carton magazine 60. At this time, since the main suction cup 52 is fixed to the suction cup attachment body 42,
Although the relative position with respect to 2 rises without change, since the auxiliary suction cup 54 is attached via the coil spring 56,
When the downward pressing force is removed, the coil spring 56 repels the main suction cup 52 to lower it. As a result, in the carton blank 58, as shown in FIG. 7, the flap 58i adsorbed by the auxiliary suction cup 54 and the lower surface 58Y integrated with the flap 58i are the upper surface 58X.
It is pushed downward with respect to and opens to be in a semi-opened state. At this point, the suction cup attachment body 42 is held in an inclined state as shown in FIG. In this way, the spring force forces the semi-opened state, so the carton blank 5
There is no fear that the upper surface 58X and the lower surface 58Y of 8 will fold downward together, so-called reverse fold.

Next, the elevation cylinder 8 and the suction mechanism 12 are moved forward by the horizontal movement cylinder 4.
In the process of moving, the vacuum of the auxiliary suction cup 54 is cut off and the flap 58i adsorbed by the auxiliary suction cup 54 is released. Since the carton blank 58 is in the half-opened state when it is taken out as described above, when the auxiliary suction cup 54 separates,
It will open further due to its own weight and it will be in a substantially open state. In this way, the carton magazine 6 is almost opened.
Since the carton blanks 58 have been moved from above 0, the opened carton blanks 58 do not interfere with other carton blanks 58 stacked in the carton magazine 60, and the carton blanks 58 are displaced. There is no. Further, even when the carton blank 58 is large, it is not necessary to lengthen the stroke of the lifting cylinder 8, and the carton blank 58 can be stacked high in the carton magazine 60.

A sensor (not shown) is provided at an intermediate portion of the horizontal movement cylinder 4, and when the sensor is reached, the tilting cylinder 44 and the positioning cylinder 46 are provided.
Is extended and the suction cup mounting body 42 is swung, and the tip of the suction cup mounting body 42 is directed downward, contrary to the time of taking out the suction cup mounting body 42.
The elevating cylinder 8 and the suction mechanism 12 are advanced as they are, the tip of the carton blank 58 facing downward is collided with the guide member 64, and the box is completely opened.

When the sensor detects that the lifting cylinder 8 has reached the front moving end, the tilting cylinder 44 swings the tip of the return suction cup mounting body 42 upward. At this time, since the positioning cylinder 46 is in an expanded state, the stopper pin 50 comes into contact with the stopper member 48 at the tip of the positioning cylinder 46 and stops, and the suction cup mounting body 42 becomes horizontal (state in FIG. 4). Then, the suction cup mounting body 42 is lowered by the lifting cylinder 8 and the carton blank 58 opened in the shape of a rectangular tube is delivered to the unloading conveyor below. After that, the suction mechanism 12 is moved up by the lifting cylinder 8 and is retracted (to the left side in FIG. 2) by the horizontal moving cylinder 4 to return to the position of FIG. 2 and the above operation is repeated.

In the above embodiment, the main suction cup 52 is set to 12
Although one piece and one auxiliary suction cup 54 are provided, the number is not limited to this and can be appropriately set according to the size and shape of the carton blank 58. In addition, the cylinder 18 is provided between the upper lifting cylinder 8 and the lower suction mechanism 12.
Although the tilting plate 22 and the like are provided so that the entire suction mechanism 12 is rotatable, this structure can be omitted.

[0023]

As described above, according to the present invention, the main adsorbing means and the auxiliary adsorbing means that move up and down integrally are provided, and the auxiliary adsorbing means is supported by the expanding and contracting means. Since the suction means is made to project below the main suction means, the main suction means sucks the upper surface of the carton blank in the carton magazine, and the auxiliary suction means causes the upper side of the carton blank to protrude outward. When a part of the lower surface side that is adsorbed is adsorbed and both of these adsorbing means are raised, the lower surface side adsorbed by the auxiliary adsorbing means is pushed downward, resulting in a semi-opening state. By moving in this state, the stroke of the elevating means can be shortened, and the overall height of the device can be reduced. Further, even in the case of a large and large carton blank, the number of carton magazines that can be accommodated can be increased. Further, it is possible to prevent reverse folding of the carton blank.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a carton blank removing device according to an embodiment of the present invention.

FIG. 2 is a side view showing the entire carton blank take-out device.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a perspective view showing a folded state of the carton blank.

FIG. 6 is a perspective view showing a state where the carton blank is opened.

FIG. 7 is a diagram illustrating a state in which a carton blank is taken out from a carton magazine.

[Explanation of symbols]

 8 Elevating means (elevating cylinder) 52 Main suction means (main suction cup) 54 Auxiliary suction means (auxiliary suction cup) 56 Expansion and contraction means (coil spring) 58 Carton blank 58a Upper surface of carton blank 58i Part of lower surface side of carton blank 60 carton magazine

Claims (1)

[Claims] 1. A vertical carton magazine for stacking and holding flatly folded carton blanks, a main suction means arranged above the carton magazine, an elevating means for elevating and lowering the main suction means, and an elevating and lowering thereof. Means for lifting and lowering together with the main suction means by means, and expansion and contraction means for supporting the auxiliary suction means and urging the auxiliary suction means downwardly below the main suction means. Operation, the main suction means and the auxiliary suction means are lowered, the main suction means sucks the upper surface of the carton blank in the carton magazine, and the auxiliary suction means causes the upper side of the carton blank to go outside. A carton characterized in that a carton blank is taken out by adsorbing a part of the lower surface side and raising both of these adsorbing means. Blank take-out device.