JPS5918250B2 - How to take out one bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of a new and improved taking-out means for automatically taking out packaging bags each having an opening on one side, starting from the lowest position of the stack. .

It is well known that packaging bags for charging various articles are generally quadrilateral in shape, and that one of the four sides is the opening and is used as a charging port. In addition, when loading articles into such a bag, or when there is a sealing tongue at the opening of such a bag, operations such as folding the tongue to seal it or applying adhesive can be automatically performed. It is also known to stack a large number of bags in a case or the like and automatically take out one bag at a time.

Conventionally, various methods have been used to take out the bag, such as suctioning the bag with a suction cup and carrying it out, or using a mechanical gripping device such as a clip or opening/closing claw to take out or pull out the bag. Conventional means have the following problems. In other words, this type of bag is often made of a thin film-like material such as a plastic film that is transparent, waterproof and moisture-proof, and when a large number of such thin and flexible materials are laminated, the bag becomes They tend to come into close contact with each other, and the suction means often malfunctions by sucking up two or more sheets at the same time, making it difficult to accurately take out one sheet at a time, making it difficult to speed up the unloading operation, and making it difficult to maintain the shape of the bag. In order to do this, suction at only one place is not sufficient, and the entire mechanism becomes larger and more complicated.Furthermore, mechanical gripping means or pinching means cannot accurately take out or pull out single sheets than suction means. This is difficult and has the drawback of damaging or deforming the bag, and a new means is required to accurately and quickly take out one bag from a group of multiple laminated bags. In response to such demands, the present invention uses air blowing or jetting means to enable accurate and quick removal of individual bags, and also to facilitate various processing and operations on the bag afterward. Its feature is that it automatically takes out one bag from a group of bags that are stacked vertically and one side of the approximately quadrilateral shape is the opening side. At this time, air is blown from the opening side of the first bag body into the inside of one side adjacent to the opening side, and the outer surface of the bag is peeled off by air injection, so that the bag body can be relatively movable along one surface of the laminated part. The point is that one sheet is taken out in an inverted manner from the bottom surface of the moving band through a taking-out gap formed between a pair of moving bands and moving along with the movement of the moving band.

The present invention will be described in detail with reference to the embodiments shown below. Figure 1 is a side view of an embodiment of the method of the present invention, Figure 2 is an exploded perspective view of the main part of the stacked bag storage, and Figure 3 is the main part of the moving belt. FIG. 4 is an explanatory view of the bag taking out state according to the present invention. In FIG. This shows an embodiment in which a single bag 1 is automatically taken out from the bottom of the group, and 2 is a stacked storage case for the bags 1, and 3 and 4 are arranged parallel to the bottom of the opening of the case 2. , and a pair of moving bands arranged so as to be relatively movable; 5 is a conveyor disposed in parallel below the moving bands 3 and 4; 6 and 7 are air injection pipes; these are the main components of the present invention. Its structure is as follows.

The bag 1 is quadrilateral in the illustrated example and is made of plastic film or other thin film material, and one side of the quadrilateral is the opening side 1a, and in the illustrated example, the opening side 1a is sealed. Although the one with the tongue piece 1b formed thereon is shown, the presence or absence of this tongue piece 1b does not matter. As is clear from FIG. 2, the laminated storage case 2 has a pair of case plates 8, 8 arranged in parallel and opposite each other, and partition claws 8a, 8a are provided at the lower ends of each of the plates 8, 8 to project inwardly from each other. , the bag body 1 is opened in the vertical direction and the front and rear direction parallel to the plate, and the bag body 1 is placed in the case 2 along its opening side 1a.
The bag body 1 at the lowest position is supported in a locking manner by partition claws 8a, 8a at the lower ends of the case plates 8, 8. will be done. At this time, a weight piece 9 is placed on the top surface of the stacked bag group 1 via a slide 11 loosely inserted into the guide 10 of the plate 8 so as to be able to move up and down, which may cause the bag group to swing. As the bags are stored in a stable manner and are taken out one by one from the lowest position, the weight piece 9 descends due to its own weight and presses and supports the group of bags to the end. A pair of moving bands 3 and 4 are disposed below the bottom surface of the opening provided with the partition claws 8a and 8a of this case 2, and as is clear from FIG.
One end of each is fixed to the fixing parts 12, 12 located at opposite positions, and the other end is fixed to one driving roll 13, 13, which is also located at opposite positions and can rotate in the forward and reverse directions. One moving band 3 is stretched via intermediate rolls 14, 15, the other moving band 4 is stretched via intermediate rolls 14, 15, and 16, and both moving bands 3, By arranging the intermediate rolls 14 and 15 of 4 at substantially the same level, the moving zone 3 between both rolls 14 and 15 is
, 4 are placed under the same level and in contact with the opening bottom surface of the case 2, and the intermediate roll 14 and the intermediate roll 1
6 is rotatably fixed at a predetermined position, while the intermediate roll 15
, 15, the drive rolls of the moving bands 3, 4 are rotatably supported by roll shaft ends on sliders 18, 18 which are slidably mounted on guide rails 17, 17, as shown in the third figure. The slider 18 on the guide rails 17, 17 as well as the feeding and winding by the forward and reverse rotations in the sliders 13, 13.
, 18, the intermediate rolls 15, 15 are moved together, and at this time, a take-out gap a is left between the intermediate rolls 15, 15 of both moving bands 3, 4 as shown in the figure. .

Therefore, by rotating the driving roll 13 on the moving band 3 side in the feeding direction and rotating the driving roll 13 on the moving band 4 side in the winding direction, the intermediate rolls 15, 15 by the sliders 18, 18 are rotated. By moving in the right direction as viewed in FIG. This rotation of the drive rolls 13, 13 in the opposite direction causes the moving bands 3, 4 to return to their old positions. In this way, the moving bands 3, 4 are placed below the pair of moving bands 3, 4 provided below the laminated storage case 2 of the bag 1.
A conveyor 5 is installed in parallel with the conveyor 5 so as to be able to circulate freely, and the conveyor 5 is stretched across a drive roll 19 and a driven roll 20 as shown in the first figure. A receiving plate 22 is installed below the conveying surface of these belts 21 to support them, and a suction pocket 23 is provided at a position corresponding to each belt 21 on this receiving plate 22. installed, suction pipe 2
4, the bag body 1 is conveyed over the belt 21 through each hole 21a of the perforated belt 21 while being suction-supported by the group of belts 21 (see FIG. 3, 1).
The air injection pipes 6 and 7 are members for peeling off and taking out the lowest bag 1 using air, and the air injection pipe 6 is connected to the above-mentioned moving band as shown in the third figure. 3,4
The slider 18 is provided on one side of the slider 18 that commonly supports the intermediate rolls 15, 15. This pipe 6 is located on one side of the opening side 1a of the lowest bag body 1 and is movable in and out of the opening side 1a, thereby blowing air into the inside of one side adjacent to the opening side 1a. For this purpose, the pipe 6 is supported by a holder 26 which is slidably attached to the bracket 18a of the slider 18 by means of a guide 25, and by a drive cylinder 27. According to the position of the pipe 6, it is located outside one side of the opening side 1a of the bag body 1, as shown in FIG. Make sure that air is blown into the sides. On the other hand, the other air injection pipe 7 has its injection port opened at the outer lower end of one case plate 8 at a position perpendicular to the pipe 6, and as shown in FIG. The air injection pipe 7 is provided so as to be able to inject air toward the outer surface of each side of the bag body 1 inflated by air blowing, and this air injection pipe 7 is provided with an appropriate holding member (not shown). It is held in a fixed state by. Although the illustrated example shows a plurality of pipes 7 arranged in a row, a single air injection pipe having a slit-shaped injection port opening over the entire length of one side may be used instead. Note that the driving means for forward and reverse rotation of the pair of moving bands 3 and 4 described above is free, but in the present invention, as an example, as shown in FIG. 3, a sprocket wheel and a chain are used. A driving means is used. That is, each sprocket wheel 28, 28 attached to each drive roll 13, 13 of the moving belts 3, 4.
, by arranging the first drive sprocket wheel 29 and the intermediate sprocket wheel 30 on the prime mover side as shown in the figure, and by stretching the chain 31 between these wheels 29, 28, 30, and 28, the drive sprocket wheel 29 Each sprocket wheel 28 of the drive rolls 13, 13
, 28 can be interlocked to move the pair of moving bands 3 and 4 relative to each other, but of course it is also possible to use other drive structures. Automatic removal of one bag 1 according to the present invention is performed as follows.

That is, Fig. 4A to 4A show their operating states, and as shown in Fig. 4A and 4B, a group of bags stacked vertically in the case 2 has a partition at the bottom end. Claw 8a,
8a, and a weight piece 9 is placed on the top end, but from this state, as shown in the figure, it is located outside the opening side 1a of the lowest bag body 1. Direct the air injection pipe 6 toward one side 1c of the bag body 1 adjacent to the opening side 1a,
By driving the cylinder 27 on the bracket 18a of the slider 18, the slider 26 is moved forward via the guide 25, and pressurized air is blown into the one side 1c.
As shown in Figure C, each side 1c expands. At this time, the lowest bag body 1 is suppressed downward by the weight of the upper bag group and the weight piece 9, so the expansion is performed downward, and one side of the expanded side 1c As shown in the figure, the intermediate rolls 15 of the pair of moving bands 3 and 4 are disengaged from the partition claws 8a and bulge out below the bottom surface of the opening.
, 15, and one side 1c of the lowest bag 1 is separated from the upper bag group. At the same time, pressurized air is injected from the other air injection pipe 7, and the pressurized air is showered over the entire length of the outer surface of one side 1c protruding into the gap a, as shown in FIG. 2. As such, one side 1c is bent in a U-shape toward the intermediate roll 15 side of one moving band 4 and takes an inverted posture. Air injection pipe 6 at this point
stops air injection and retreats to the old position, and thus, with the reverse bending of each side 1c by the pipe 7, the pair of moving bands 3 and 4 are moved from the position of FIG. 2 to the direction shown in FIG. simultaneously start their relative movement in the right direction. That is, the chain 31 sprocket foils 29, 28,
30, 28, etc., one of the moving bands 3 is fed out from its driving roll 13, and the other moving band 4 is wound around its driving roll 13, so that the moving band 3,
4 is fixed by fixing parts 12, 12 at each end, and each intermediate roll 15, 15 moves together via sliders 18, 18 and guide rails 17, 17, and passes under the open bottom surface of case 2. Become. Therefore, the take-out gap a between the intermediate rolls 15 and 15 of the moving bands 3 and 4 also moves together without changing, and as the one side 1c is reversed, the bag 1 is successively peeled off from the upper bag group. Removal gap a
The entire bag 1 is taken out in the same inverted manner through the bag 1, and the bag 1 is transported horizontally onto the lower conveyor 5 with the side 1c at the beginning. At this time, since the conveyor 5 relies on each perforated belt 21 and the suction box 23, the transferred bags 1 are held in an inverted horizontal position over the surface of each belt 21, and are transferred to the next process as the comparer 5 moves. Various processing operations and loading operations of articles are carried out or carried out on this conveyor 5. At this time, the figure shows the state in which the bag body 1 is being transported, but as shown in the figure, a push roll 33, an intermediate roll 34, etc. are arranged on a part of the conveyor 5,
Further, by installing a phototube or other detection member 35 at this position, when one side 1c of the bag 1 on the conveyor 5 reaches this position, the detection member 35 detects this and outputs a detection signal. The conveyor 5 is once stopped by
, 4 back to the starting position shown in Figure 2, and the lowest bag 1 is peeled off and reversed and taken out again as shown in Figures 1 to 2. , it is easily possible to automatically take out the sheets one by one from the lowest one. The present invention is as described above, and when taking out one bag 1 from a group of laminated bags, the air injection pipes 6 and 7 are connected from one side of the opening side 1a of the lowest bag 1 to the same side. By freely advancing and retracting toward one side 1c connected to the opening side 1a and directionally disposing the side 1c on the outer surface of the side 1c, one u side 1c is removed from the upper layer bag by blowing and spraying air. It is different from the conventional one in that it can be peeled off reliably from the surface, and it can be taken out in a horizontal position by being inverted onto a conveyor 5, for example, by a pair of moving bands 3 and 4 that move relative to each other located on the lower surface. It is extremely superior.

That is, by blowing pressurized air into one side 1c of the bag 1 to inflate it, the one side 1c inevitably expands downward due to the pressure exerted by the upper bag, thereby ensuring that the side 1c is inflated downward. The movable bands 3, 4 are separated by peeling, and pressurized air is injected toward the outer surface of the peeled side 1c.
This one side 1c is bent into a U-shape within the take-out gap a between the two and directed onto the conveyor 5 below, and at the same time, by relative movement of the moving bands 3 and 4, the bag body 1 is smoothed over its entire surface. Since there is no relative movement other than peeling between the bag 1 being removed and the moving bands 3 and 4, the bag 1 is handled in a stationary state, so to speak. Not only can stable removal be carried out smoothly without deformation or shifting, but also the movement of the movable belts 3 and 4 along the bottom of the opening of the case 2 prevents the following laminated bags from accompanying or swinging. This allows a stable stacked state to be maintained at all times without causing any problems.
In addition, since only the air current touches the bag 1, it does not cause any damage to the bag 1, even if the bag 1 is made of a film material that is extremely thin and flexible and easily adheres to each other when laminated.
Accurate and error-free separate and unloading of individual sheets can be easily achieved. In addition, when taking out the bag 1, the bag 1 can be smoothly transferred onto the conveyor 5 in an inverted horizontal position without any difficulty due to the movement of the take-out gap a and the sequential peeling of the bag 1 as a result. For example, handling of the bags 1 on the conveyor 5 is also facilitated, and automatic pick-up of single bags with accuracy and error-free performance, which cannot be achieved with conventional suction means or mechanical gripping means, is performed at high speed and with high efficiency. It can be done.

[Brief explanation of drawings]

Fig. 1 is an overall side view of an embodiment of the method of the present invention, Fig. 2 is an exploded slope view of the main part of the case, Fig. 3 is a slope and side sectional view of the main part for taking out the bag, and Fig. 4 is a side view of the main part of the case. It is an explanatory view of an operating state. 1...Bag body, 1a...Opening side, 1c.
...One side, 2...Laminated storage case, 3
, 4...Moving belt, 5...Transport conveyor, 6, 7...Air injection pipe, a...
・Ejection gap.

Claims (1)

[Claims] 1. When automatically taking out one bag from a group of bags stacked vertically and with one side of the substantially quadrilateral as the opening side, the opening side of the first bag is taken out. A moving band is formed between a pair of moving bands that are relatively movable along one surface of the laminated portion through separation by blowing air into the inside of one side adjacent to the opening side from the side and jetting air to the outer surface of the side. A method for taking out one bag at a time, characterized in that the bag is taken out one by one in an inverted manner onto the lower surface of the moving band using a takeout gap that moves along with the movement of the bag.