JP2022010298A - Packaging bag, manufacturing method for packaging bag and packaging method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag that allows the packaging bag to be detached from an easy-to-cut part such as perforations without leaving a film fragment, a manufacturing method for the packaging bag, and a packaging method using the same.

SOLUTION: A packaging bag 10 has a bag body part 11 and an overhanging body 13 projecting from one side of a bag opening 12 of the bag body part 11. By providing an easy-to-cut processing part 15 that crosses the overhanging body along the opening of the bag, the overhanging body 13 is divided into an overhanging part 13a on the bag body side and an ear part 13b attached to a packaging machine. The overhanging part 13a is provided with a melt-processing part 16 along the easy-to-cut processing part 15. The melt-processing part may be formed by melting with a heater.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a packaging bag for packaging fruits and vegetables, a method for manufacturing the packaging bag, and a packaging method using the same. More specifically, it has a bag main body portion and an overhanging body overhanging from one side of the bag opening of the bag main body portion, and is provided with an easy-cutting processing portion that crosses the overhanging body along the bag opening. The present invention relates to a packaging bag in which the overhanging body is divided into an overhanging portion on the bag main body side and an ear portion attached to a packaging machine, a method for manufacturing the packaging bag, and a packaging method using the same.

As the packaging device for fruits and vegetables using the packaging bag as described above, the ones described in the following Patent Documents 1 and 2 are known. According to the apparatus of the same document 1, as shown in FIGS. 4 and 9, the locking hole 305 of the holding portion 303 is penetrated through one pin to support the packaging bag. Then, wind is sent from the opening 302 to inflate the bag, and fruits and vegetables are put into the packaging bag through the opening 302, and the packaging bag is torn at the perforation 304 to complete the encapsulation. The number of pins shown in FIGS. 2, 4 and 5 of Patent Document 2 is the same, though the number of pins is two. Further, in the case shown in FIGS. 7 to 9 of Patent Document 2, a wide packaging bag is arranged sideways and a wind is blown into the bag.

By the way, although a comparative example is shown in FIG. 5B, when only the perforation 15 is provided, the film is torn from the perforation 15 portion, and the film fragment as shown by the sign 13ax is irregularly formed. It may appear (see photos 9 to 10). In such a case, the film fragment 13ax has the inconvenience that the wind B does not reach the bag opening 12 and the packaging bag does not open. Further, even when the mouth of the bag is opened by hand and fruits and vegetables are inserted, if a film fragment is generated, the opening of the bag may be blocked and the work efficiency may be lowered.

Japanese Unexamined Patent Publication No. 2011-168280 Japanese Unexamined Patent Publication No. 2016-88615

In view of such conventional circumstances, an object of the present invention is a packaging bag, a method for manufacturing a packaging bag, and a method for manufacturing the packaging bag, which allows the packaging bag to be detached without leaving a film fragment from an easily cut portion such as a perforation. The purpose is to provide the packaging method used.

In order to achieve the above object, the characteristic configuration of the packaging bag according to the present invention has a bag main body portion and an overhanging body overhanging from one side of the bag opening of the bag main body portion, and the overhanging body is provided. By providing an easy-to-cut portion that crosses along the bag opening, the overhanging body is divided into an overhanging portion on the bag main body side and an ear portion attached to the packaging machine. The overhanging portion is provided with a melt-processed portion along the easy-cutting-processed portion.

According to the same configuration, by providing the melt-processed portion as shown in FIG. 5 (a), even if tearing occurs from an easily cut portion such as a perforation, the tearing is stopped by the melt-processed portion. .. As a result, as shown in FIGS. 5 (b) and 9, no film fragment remains in the selvage. Therefore, the wind is blown from the opening of the bag, and the packaging bag is inflated more reliably. Further, even when the bag opening is widened by hand and the contents are inserted, the film fragment does not interfere.

In the above configuration, the easy-to-cut portion may be formed by perforations. Further, by making the melt-processed portion melted by a heater, the processing can be easily performed. In this packaging bag, wind is blown into the bag opening to expand the bag body, or the bag opening is manually expanded to insert the contents into the bag body.

On the other hand, a feature of the method for manufacturing a packaging bag for achieving the above object is that the first film and the second film are staggered and stacked so that the upper part overhangs to form a bag main body continuous with the overhanging body. A method in which the overhanging body is divided into an overhanging portion on the bag main body side and an ear portion attached to a packaging machine by providing an easily cut processing portion that crosses the overhanging body along the bag opening. The present invention is to provide a melt-processed portion along the easy-cutting-processed portion in the overhanging portion.

In the same manufacturing method, the easily cut portion may be formed as a perforation by a perforation cutter. Further, in the same manufacturing method, it is preferable to form the melt-processed portion by bringing the heater into contact with the overhanging portion and melting it. In the packaging bag used in this manufacturing method, wind is blown into the bag opening to expand the bag body, and the contents are inserted into the bag body.

Further, the feature of the packaging method using the above-mentioned packaging bag is that the packaging device and the packaging bag are provided, and the packaging bag includes the bag main body and the overhanging body protruding from one side of the bag opening of the bag main body. By providing an easily cut processing portion that crosses the overhanging body along the bag opening, the overhanging body can be attached to the overhanging portion on the bag main body side and the ear portion attached to the packaging machine. In this method, a melt-processed portion is provided along the easy-cutting-processed portion in the overhanging portion, and wind is blown into the bag opening to expand the bag body, or the bag body is expanded. , The opening of the bag is expanded by hand, the contents are put into the bag body, and the bag body in which the contents are inserted along the easy-cutting portion is cut and detached together with the overhanging portion. be.

According to the above-mentioned feature of the present invention, a wrapping bag capable of detaching the wrapping bag without leaving a film fragment from an easily cut portion such as a perforation, a method for manufacturing the wrapping bag, and a wrapping method using the same. It came to be possible to provide.

Other objects, configurations and effects of the invention will be apparent from the embodiments of the invention below.

It is an exploded perspective view of the fruit and vegetable packaging apparatus which concerns on 1st Embodiment of this invention. It is a side view of FIG. It is a figure which shows the packaging bag to be attached to the fruit and vegetable packaging apparatus of FIG. It is a figure corresponding to (b) in a state where is opened. It is a perspective view of the fruit and vegetable packaging apparatus of FIG. 1, in which (a) shows a state in which a packaging bag is hooked on a hopper, and (b) shows a state in which a packaging bag is pressed by a support and air is supplied. It is a vertical cross-sectional view in the vicinity of the ventilation notch of the hopper, (a) is a case where a melt-processed portion is provided, and (b) is a case where a melt-processed portion is not provided. It is a figure which shows the manufacturing process of the packaging bag which concerns on this invention. FIG. 6 is a vertical cross-sectional view of the processing heater device of the melting processing section in the direction orthogonal to the paper surface. It is a photograph which shows the cutting state of the packaging bag when the melt processing part is provided. It is a photograph of the vicinity of the selvage portion showing a state in which a film fragment is generated when the melt-processed portion is not provided. It is another photograph near the selvage part which shows the state which the film fragment was generated when the melt processing part was not provided. It is a figure which shows the other embodiment of the packaging bag provided with the melt processing part.

Next, an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 10.
As shown in FIGS. It is provided with a blower unit 3 for sending wind (air flow, air) as a gas toward the air. The air blowing unit 3 communicates with the device main body 4 internally, and the air taken in from the intake port 6 is supplied and blown by the air blowing means 5 built in the device main body 4. Further, below the blower portion 3, a support tool 40 for pressing the packaging bag 10 toward the hopper 2 near the lower end of the hopper 2 is provided.

In the present embodiment, examples of the fruits and vegetables V to be introduced include long fruits and vegetables such as garlic chives, green onions and white onions, and leaves such as spinach and bok choy. In such a case, the fruit and vegetable packaging device 1 is installed at a predetermined height by, for example, a tripod 100A or the like, and is attached to a table or the like by using a fixing plate 7.

As shown in FIG. 3, the packaging bag 10 is formed by welding the overhanging body 13 protruding from the bag opening 12 and the strip-shaped first film 17 and the second film 18 at the peripheral portions thereof in the present embodiment. It is formed in a bag shape. Further, by forming the first film 17 longer than the second film 18, the overhanging body 13 protruding from the bag opening 12 is integrally formed with the first film 17. The overhanging body 13 is formed with a pair of through holes 14 to penetrate through the mounting pin 25 of the hopper 2 and a perforation 15 as an easy-to-cut portion in the vicinity of the bag opening 12. The materials of the first and second films 17 and 18 are not particularly limited, but in the present embodiment, for example, a biaxially stretched polypropylene film is used.

A plurality of each packaging bag 10 is fused at the selvage portion 13b of the overhanging body 13 to form a packaging bag bundle 10x. In the bag bundle 10x, when the bag is torn off at the perforation 15, the selvage portion 13b of the overhanging body 13 remains laminated. A melt processing portion 16 described later is provided between the perforation (easy cutting processing portion) 15 and the bag opening portion 12. The melt-processed portion 16 stops the tearing starting from the perforation 15, and the overhanging portion 13a separates from the selvage portion 13b without tearing. Therefore, in order to prevent continuous tearing from the perforation 15 as a base point, it is desired that the melt-processed portion 16 is closer to the perforation 15 than the bag opening 12.

Here, the structure and process of the bag making machine 100 will be described with reference to FIGS. 6 and 3. In the structure of the bag making machine 100, first, the first and second films 17 and 18 are supplied in a roll form and are associated with each other by the roller R1. The above-mentioned overhanging body 13 portion is formed by shifting only the first film to, for example, the front side of FIG. The first and second films 17 and 18 are joined to the rear end seal cutting machine 101, and both the first and second films 17 and 18 are fused to continuously form the lower end of the packaging bag. The perforation forming machine 102 includes a cutter whose blade is intermittently formed on the circumferential portion and a backup roller at the lower portion, and continuously forms perforations (easy cutting processing portions) 15 on the overhanging body 13. Subsequently, a pair of through holes 14 are formed by the punching press 103.

Then, the above-mentioned melting processing portion 16 is formed between the perforation (easy cutting processing portion) 15 and the bag opening 12 by the melting processing machine 104. After that, the butted bodies of the first and second films 17 and 18 are melted by the side seal cutting machine 105, and the side seals are made to form the packaging bag 10, which is carried to the stacker 107 by the conveyor 106 and laminated. To. The bundles of the laminated packaging bags 10 are appropriately bonded to each other at the selvage portion 13b described above. Although individual packaging bags may be set in the packaging device without forming a bundle of packaging bags 10, the bundles are easier to replace the packaging bags 10.

FIG. 7 is a cross-sectional view of the melting machine 104. The melting machine 104 includes a heater portion 110 that is intermittently moved up and down by a cylinder, and a receiving portion 120. The heater portion 110 has a wedge-shaped melting portion 112 attached to the lower end of the block 111, and a heater 113 such as a sheath heater is inserted into a long hole formed through the block 111 in front of and behind the paper surface. The temperature of the heater 113 is controlled by the thermocouple 114 fixed by the bolt 115, and the first film 17 is melted without being melted so that the melt-processed portion 16 that stops the tearing of the film can be formed.

The heater portion 110 of the melting processing machine 104 can be continuously processed by using a roller-shaped heater or an ultrasonic sealing machine. However, in order to disperse the pressure in the width direction and melt the above-mentioned functions, the melting machine 104 that moves up and down of the heater unit 110 that moves up and down is excellent.

In the bag making machine 100, the rear end seal cutting machine 101, the perforation forming machine 102, the punching press machine 103, and the melting processing machine 104 may be provided back and forth as appropriate. However, by arranging the melting machine 104 after the rear end seal cutting machine 101 and the perforation forming machine 102, there is an advantage that it becomes easy to make fine adjustments so that the melting machine 16 is closer to the perforation 15. be.

As shown in FIGS. 1 and 2, the blower portion 3 takes in air from the intake port 6 and discharges the air B from the discharge port 31 toward the lower part by the blower 5a of the blower means 5, and the discharge port 31 and the device main body portion. A communication unit 32 for communicating with 4 is provided. The regulator 5b of the blower means 5 is a variable resistor connected to the motor or the like of the blower 5a, and the resistance value is changed by rotating the knob 5b1 to adjust the blower amount of the blower 5a. A screw hole 33 for screwing the fixing means 24a, which will be described later, is formed on the side surface 32a of the communication portion 32. Further, the blower portion 3 is provided with a plate-shaped hanging portion 34 that hangs down along the vertical direction Z.

As shown in FIGS. 2 and 3, the hopper 2 has a cylindrical shape that gradually narrows from the upper portion 21 to the lower portion 22. A substantially rectangular notch 23 in which the upper opening 21a and a part of the outer peripheral surface 20 are notched is formed in the upper portion 21, and a pair of plate-shaped mounting portions 24 are provided on both sides in the width direction thereof. .. The attachment portion 24 is attached to the side surface 32a of the blower portion 3 by, for example, a fixing means 24a such as a screw or a bolt, and the wind B blown from the blower portion 3 is supplied to the packaging bag 10 through the notch portion 23. Further, a pair of mounting pins 25 for mounting the packaging bag 10 are erected on the outer peripheral surface 20 of the hopper 2.

As the hopper 2, those having different diameters are appropriately selected and used by attachment / detachment replacement. Long fruits and vegetables are used for the small-diameter hopper 2 shown in FIG. 1 and the like, and leaves and the like are used for the large-diameter hopper (not shown), and the size of the bag is changed according to the diameter.

The blower side portion 22a of the lower portion of the hopper 2 is inclined toward the side closer to the worker side portion 22b than the worker side portion 22b of the lower part of the hopper, and receives the wind from the blower portion 3. A ventilation notch 28 is provided at the lower end of the blower side portion 22a. Further, the outer surface on the same side has two mounting pins for penetrating and supporting the selvage portion of the bag bundle. Then, the selvage portion 13b is attached along the curve of the blower portion side portion 22a and pressed by a support tool described later.

The ventilation passage W that guides the wind B from the discharge port 31 of the ventilation means 5 to the ventilation notch 28 ahead is composed of the ventilation portion side portion 20a of the hopper 2 and the hanging portions 34a and 34b. The wide hanging lower portion 34a forms a tubular ventilation path jointly with the ventilation portion side portion 20a of the hopper 2, and further includes a wide hanging lower portion 34b in the vicinity of the ventilation notch 28. A lateral opening 34c is formed between the narrowed lower portion 34b and the ventilation portion side portion 20a of the hopper 2. The lateral opening 34c supplies the wind downward and at the same time supplies the wind in the lateral direction, and supplies the wind B to the entire hopper. Since the lateral wind by the narrow lower portion 34b is wound near the ventilation notch 28, the wind sufficiently reaches the ventilation notch 28.

As shown in FIGS. 1 to 4, the support 40 is provided with an upper support 41 and a lower support 42 on a rod-shaped portion 43 whose one end is rotationally fixed to the device main body 4 via an elastic member or the like. Become. The upper support 41 bypasses the outer peripheral surface 20 of the hopper 2 and has pressing portions 41a and 41a at the bent corners of the bifurcated tips. Then, the two pressing portions 41a and 41a press the two locations P and P near the lateral end of the selvage portion 13b in the vicinity of the perforation 15 to realize the close contact of the selvage portion 13b. .. The tip of the lower support 42 is also provided with a pressing portion 42a so as to follow the inclination direction of the packaging bag 10, and the pressing portion 42a lightly presses the outside of the arc of the packaging bag 10 to bring the tip of the ear portion 13b into close contact. Assist.

The mounting means that makes the hopper removable and replaceable is screwed into a notch 24b formed in at least two upper and lower positions in each of the pair of mounting portions 24, and screw holes 33 provided in four locations near the blower portion. It has fixing means 24a such as screws and bolts. The notch 24b is composed of an elongated hole 24b1 along the top and bottom and a horizontal notch 24b2 leading to the lower portion thereof.

Each hopper 2 has one large flap 71 and two small flaps 72 for guiding the fruits and vegetables V from the hopper 2 to the packaging bag 10. One first slit 26 and two second slits 27 are formed in the hopper 2, and a large flap 71 and a small flap 72 are inserted into the slits 26 and 27, respectively. The large flap 71 has a neck 71c with a step between the main body 71a and the weight 71b. Further, the small flap 72 has a notch 72c partially constricted between the main body 72a and the weight 72b. Both the main bodies 71a and 72a are constantly lifted by the weights 71b and 72b, but when they come into contact with the fruits and vegetables V, they swing down and become a bridge between them and the bag. Both the neck 71c and the notch 72c prevent the flaps 71 and 72 from falling out of the slits 26 and 27.

Here, the packaging process of fruits and vegetables V will be described with reference to FIGS. 1 to 5.
First, as shown in FIG. 4A, with the support 40 separated from the hopper 2, a plurality of packaging bag bundles 10x are placed through the through holes 14 of the overhanging body 13 and the mounting pins 25 of the hopper 2 are inserted. Attach to each of them by hanging them. At this time, the packaging bag 10 is suspended in the vertical direction Z by the first film 17, and the bag opening 12 is located directly below the lower opening of the hopper 2. Here, the packaging bag 10 is tilted so as to be in close contact with the blower portion side portion 22a of the outer peripheral surface 20 of the hopper 2, and the support 40 is rocked toward the hopper 2 as shown in FIG. 4 (b). Move. As a result, the upper support 41 holds the portions P and P near the end of the selvage portion 13b of the packaging bag bundle 10x at the lower portion 22 of the hopper 2 by pressing the previous pressing portions 41a and 41a against the blower portion side portion 22a. do. A pressing portion may be further provided inside between P and P.

Next, the power of the fruit and vegetable packaging device 1 is turned on, the wind B is supplied to the blower portion 3 by the blower 5a of the blower means 5, and is discharged from the discharge port 31 toward the lower portion 22 of the hopper 2. The relationship between the lower portion 22 of the hopper, the selvage portion 13b, the bag opening portion 12, and the perforation portion 15 is as shown in FIGS. A ventilation notch 28 is provided, and the ventilation passage is continuous from the discharge port 31 of the air blower 3 to the wide hanging lower portion 34a which forms a tubular space jointly with a part of the hopper, and is continuous below the vicinity of the ventilation notch 28. Since the width narrowing lower portion 34b is provided and the lateral opening portion 34c is formed between the width narrowing lower portion 34b and the hopper 2, the wind B is the bag opening portion 12 as shown in FIG. 5 (a). The packaging bag 10 is slanted and inflated.

Then, as shown in FIGS. 2 and 4, when the worker throws (falls) the fruit and vegetable V from the upper portion 21 of the hopper 2, the fruit and vegetable V is guided in the vertical direction Z by the hopper 2. Immediately below the lower portion 22 of the hopper 2, the bag opening 12 is opened by the wind B and is guided by both flaps 71 and 72, so that the fruit and vegetable V can be smoothly filled in the packaging bag 10. Then, the packaging bag 10 is cut at the perforation 15 due to the weight of the fruits and vegetables V, and the next packaging bag 10 is opened by the wind B. In this way, if the worker throws the fruits and vegetables V from the upper portion 21 of the hopper 2, the put fruits and vegetables V are almost automatically put into the packaging bag 10 and the packaging is completed.

Next, the possibility of other embodiments of the present invention will be referred to.
In the above embodiment, two first and second films 17 and 18 are overlapped and used, but one film may be bent to form a bag. The easy-cutting portion 15 is formed as a perforation by the perforation forming machine 102, but for example, even if the easy-cutting processing is performed by using ultrasonic waves or the easy-cutting processing is performed by a device similar to the melting processing machine 104. good. In addition, various modifications of the elements of the present invention can be made without departing from the spirit of the present invention.

FIG. 11 is a packaging bag 10 for packaging leaves such as spinach and bok choy. The entire bag extends toward the bag opening 12 side, and a perforation 15 and a melt processing portion 16 are provided. As described above, the shape of the packaging bag 10 and the number and positions of the through holes 14 can be freely changed. Further, the bundle of the packaging bag 10 may be fixed to the packaging device only with a clip without providing the through hole 14.

INDUSTRIAL APPLICABILITY The present invention can be used not only for packaging bags for fruits and vegetables, but also for packaging long objects other than fruits and vegetables, leafy substances, lumpy substances, and the like. In addition to the packaging device that blows wind, it can also be applied to a packaging device (jig) that widens the opening of the bag without blowing wind.

1,1': Fruit and vegetable packaging device, 2: Hopper, 2A: Small diameter hopper, 2B: Large diameter hopper, 3: Blower, 4: Device body, 5: Blower means, 5a: Blower, 5b: Adjuster, 5b1: Knob, 6: Intake port, 7: Fixing plate, 10,10': Packaging bag, 10x: Packaging bag bundle, 10b: Inner surface, 11: Bag body, 12: Bag opening, 13: Overhang, 13a: Overhanging part, 13b: Ear part, 13bx: Ear bundle, 14: Through hole, 15: Perforation (easy cutting processing part), 16: Melting processing part, 17: First film, 18: Second film, 20: Outer peripheral surface, 21: Upper part, 21a: Upper opening, 22: Lower part, 22a: Blower side part, 22b: Worker side part, 23: Notch part, 24: Mounting part, 24a: Fixing means (screw, Bolt), 24b: Notch, 25: Mounting pin, 26: First slit, 27: Second slit, 28: Ventilation notch, 31: Discharge port, 32: Communication part, 32a: Side surface, 33: Screw hole, 34 : Hanging lower part, 34a: Wide hanging lower part, 34b: Narrow hanging lower part, 34c: Lateral opening, 34': Protruding part, 40: Support tool, 41: Upper support, 41a: Pressing part, 42: Lower support 42a: Pressing part, 43: Rod-shaped part, 50: Bag holding member, 51: Mounting part, 51a: Protruding part, 51b: Notch part, 51z: Straight side part, 52: Holding part, 52a: Notch part, 52b : Mounting part, 52c: Fixing means, 52z: Straight side part, 53: Connecting part, 60: Dispersing member, 60a: Opening, 61: Main body part, 62: Bent part, 63: Slope, 64: Gap, 71: Large flap, 71a: Main body, 71b: Weight, 71c: Neck, 72: Small flap, 72a: Main body, 72b: Weight, 72c: Cut, 100: Bag making machine, 101: Rear end seal cutting machine, 102: Sewing machine Eye forming machine, 103: punching press machine, 104: melting machine, 105: side seal cutting machine, 106: conveyor, 107: stacker, 110: heater part, 111: block, 112: melting part, 113: heater, 114 : Thermoelectric pair, 120: Receiving part, 121: Welding prevention sheet, 122: Receiving block, B: Wind (air flow), V: Fruits and vegetables, W: Ventilation path, X: Horizontal direction, Z: Vertical direction

Claims (1)

By having a bag main body portion and an overhanging body overhanging from one side of the bag opening of the bag main body portion, and providing an easy-cutting processing portion that crosses the overhanging body along the bag opening portion. A packaging bag in which the overhanging body is divided into an overhanging portion on the bag body side and an ear portion attached to the packaging machine.
The strip-shaped first film and second film are welded at the periphery thereof to form a bag shape.
The first film is formed longer than the second film, and is formed.
The material of the first film and the second film is a packaging bag made of biaxially stretched polypropylene film.

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