JPH10236429A - Forming method and device of vacuum packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unify the distribution of the contents of a bag hermetically sealed and packaged in a state that the contents A is deviated to the bottom side. SOLUTION: A touch member 9 is attached at a slant to the cover 3 of a vacuum chamber and a receive base 4 of a vacuum packaging bag W is installed at the lower side thereof. The receive base 4 is made vertically movable between the horizontal position (solid line) and the inclined position (imaginary line) by the actuation of a cylinder 8. And when it is positioned at the inclined position, the receive base 4 is set to be parallel to the touch member 9. The direction of the vacuum packaging bag W on the receive base 4 is set so that the bottom of bag is turned upward when the receive base 4 is inclined. The contents A are shifted to the bag opening side (lower side) and the vacuum packaging bag W is made flat to uniformly distribute the contents in the bag by vertically moving the receive base 4 and lightly hitting and/or pushing repeatedly the bag W onto the touch member 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaping method and apparatus for uniformly distributing the contents of a vacuum-sealed package in a bag with the contents being biased to one side of the bag.

[0002]

2. Description of the Related Art For example, in a vertical vacuum packaging machine described in Japanese Patent Application Laid-Open No. 5-162716, a packaging bag filled with contents is suspended vertically in a vacuum chamber, and the interior of the chamber is evacuated to vacuum. The inside of the bag is evacuated, the mouth of the bag is hermetically sealed, and then the inside of the chamber is returned to the atmosphere and opened.
The sealed packaging bag is discharged. The vacuum packaging bag is sealed in a vertically suspended state and taken out to the atmosphere as it is. Unless the contents are liquid or contain a lot of liquid, the contents (solids) are naturally placed under the bag. It is in a state of being biased toward.

[0003] In order to improve this deviation as much as possible, it is necessary to provide a shaping plate for holding the packaging bag from the side in a vertical vacuum chamber, hold the packaging bag flat with this shaping plate, and vacuum seal in this state. It is known (for example, Japanese Utility Model Laid-Open No. 60-118603). However, not only the contents that can be flattened just by holding down with a shaping plate, but even if the shaping can be performed, only the portion below the gripping portion of the bag can be shaped. Therefore, even if a certain degree of uniform distribution can be obtained from the bag bottom to the grip portion, the content does not exist between the grip portion and the bag mouth seal portion. Is not fully resolved.

In a horizontal vacuum packaging machine described in, for example, Japanese Patent Application Laid-Open No. 58-82823, a packaging bag is laid in a vacuum chamber, so that it is not generally shifted as badly as a vertical vacuum packaging machine. Nevertheless, there must be no contents in the vicinity of the seal portion, so that the contents are offset to the bag bottom when viewed from the entire bag.

[0005] As a method of eliminating this biased state,
2. Description of the Related Art There is known a method in which a sealed packaging bag is pressed while being conveyed by sandwiching it between, for example, two conveyors (press conveyors) to spread the contents evenly in the bag. However, if the contents are vacuum packaging bags that do not contain or contain very little liquid, such as dried beans, hijiki, and kimpara, the bag will be tightly adhered to the contents (solids) at atmospheric pressure. Because of this, this biased state cannot be eliminated even by the press conveyor, and the contents may be crushed or the bag may be broken if excessive force is applied. And, the vacuum packaging bag in which the contents are skewed and wrapped in a lump does not look good because it swells in a lump, and when sterilizing, there is a difference in the thickness of the bag and the sterilizing effect does not increase,
In addition, it becomes difficult to properly pack a certain number of boxes.

[0006] Further, as means for eliminating the bias of the contents of the sealed vacuum packaging bag, for example, Japanese Utility Model Publication No. 8-89.
No. 67, Japanese Patent Publication No. Hei 7-59418 or Japanese Patent Application Laid-Open No. 63-317430 disclose that a vacuum packaging bag is placed horizontally on a bed in a vacuum chamber, and the bed is pressed from above with a pressure plate while applying vibration. An apparatus for pressing and shaping is described. In these means, since the contents and the bag are tightly adhered under the atmospheric pressure, the vacuum packaging bag is again placed in vacuum to release the adherence by the atmospheric pressure, and the contents are shaken and pressurized in that state. The objects are distributed evenly in the bag and the bag is flattened. But, for example, dried beans,
In the case of a vacuum packaging bag containing no liquid or having a very small amount of liquid, such as hijiki and kinpira, the contents did not move well and the effect of homogenization was not sufficient.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has been made in consideration of the above-mentioned problems. It is an object of the present invention to provide a method and an apparatus for effectively distributing the distribution of the particles in a bag.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for shaping a vacuum packaging bag, comprising the steps of: loading a vacuum-sealed bag in a vacuum chamber with the contents leaning toward one side of the bag (usually the bag bottom side); And placed on a pedestal, driving the pedestal up and down and striking and / or pressing against a contact member installed above in a state where the one side is inclined upward, and this is repeated. It is characterized in that the distribution of contents is made uniform within the bag. When pressing and / or hitting the bag on the receiving member against the contact member, if the receiving member is set so as to be substantially parallel to the contact member, it is possible to obtain a packaging bag whose both sides are shaped substantially parallel. .

The vacuum packaging bag shaping device according to the present invention is a vacuum packaging device for uniforming the distribution of contents in a vacuum-sealed package in a state in which the contents are offset to one side of the bag. A bag shaping device, in which a contact member is installed in a vacuum chamber at an angle and a receiving stand for a vacuum packaging bag is installed below the receiving member, and the receiving stand is placed in a horizontal position and substantially parallel to the contact member. And a drive means for swinging the cradle. As a more specific form, the vacuum chamber is a horizontal vacuum chamber, which includes a chamber body and a chamber lid, a contact member is attached to the chamber lid, and a cradle is installed in the chamber body. The driving means of the cradle preferably has a driving source in the vacuum chamber, particularly in the chamber main body, but the driving source can be provided outside the vacuum chamber.

As a preferred specific example of the shaping apparatus, a plurality of vacuum chambers provided with the abutment member and the receiving table are arranged at equal intervals on a rotor which rotates horizontally, and a plurality of vacuum chambers are provided while each vacuum chamber rotates. Another example is a rotary shaping device that sequentially performs cycles such as supply of a vacuum packaging bag, deaeration of a chamber, and shaping of a bag.
Note that in the method or apparatus of the present invention, the term “inclination” means that it is inclined with respect to a horizontal plane.

In the present invention, a vacuum packaging bag is placed on a receiving table in a vacuum chamber, the inside of the vacuum chamber is evacuated, and then the receiving table is swung up and down so that the vacuum packaging bag is set up. Repeatedly tap and / or press on the member. And, at that time, the side where the contents of the vacuum packaging bag are biased is up, so
When the bag hits the contact member, the contents are simultaneously moved by gravity to the opposite side (downward), so that uniform distribution of the contents is efficiently achieved. In addition, the interval between the case where the receiving table swings and tilts and becomes parallel to the contact member is substantially equal to the thickness of the vacuum packaging bag after shaping, and is set in advance in consideration of this point.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to FIGS. Shown here is a continuous drive rotary type vacuum shaping device, in which a rotor has a plurality of horizontal vacuum chambers horizontally arranged at equal intervals, and a bag mouth vacuum seal is placed on a receiving table in each rotating horizontal vacuum chamber. The received packaging bags W are received, and cycles such as degassing and shaping are sequentially performed in each chamber (see FIG. 4). Further, a supply conveyor for supplying the vacuum packaging bags W to the horizontal vacuum chamber and a discharge conveyor for carrying out the shaped vacuum packaging bags are additionally provided.

The horizontal vacuum chamber 1 comprises a chamber body 2 and a chamber lid 3 as shown in FIGS. In the chamber main body 2, a plate-shaped receiving base 4 on which a vacuum packaging bag W containing the filling material A is placed is installed rotatably around a support shaft 5, and a tip of a cylinder rod 6 is provided at an end thereof. The horizontal shaft 7 attached to the support shaft 5 is engaged, and can be vertically swung about the support shaft 5 between the solid line position (horizontal position) and the imaginary line position (inclination position) in FIG. ing. On the other hand, a plate-shaped contact member 9 is installed on the chamber lid 3 so as to face the cradle 4, and the inclination is
When the cradle 4 comes to the inclined position, it is set so as to be substantially parallel to the contact member 9. Further, the chamber main body 2 is inclined outwardly of the rotor in a discharging step described later, and the chamber lid 3 is in close contact with the chamber main body 2 or can be freely opened upward, and a hose connection port for vacuum suction is provided. 10 are provided.

Next, the operation process of this vacuum shaping apparatus will be described. As shown in FIG.
(Chamber lid 3 is not shown) is installed horizontally and at equal intervals on the rotor and rotates continuously. During one rotation, supply and degassing, shaping, etc. of the packaging bag described below are performed. Steps (1) to (7) are performed.

(1) Supply / Loading Step of Filling / Packaging Bag With the chamber lid 3 opened upward, the contents A are stored by the supply conveyor 11 and the vacuum-sealed vacuum packaging bag W is received in the chamber main body 2. It is supplied onto the table 4 from the tangent T direction. The supply conveyor 11 is set at a transport speed corresponding to the moving speed of the horizontal vacuum chamber (in other words, the moving speed of the receiving table 4), and the vacuum packing bag W is set with the bag bottom side forward and the bag mouth side backward. The top is carried in synchronization with the movement of the cradle 4 and is supplied and placed on the cradle 4. In the vacuum packaging bag W at this time, the contents A are stored so as to be offset toward the bag bottom side.

(2) Lid Tightening Step The chamber lid 3 is lowered by a cam guide provided in the rotor, and the chamber body 2 is closed by the seal ring 12.
And it becomes a closed state. (3) Deaeration Step The inside of the chamber 1 is communicated with the vacuum pump side by the switching valve, vacuum suction is started, and the inside of the chamber 1 is depressurized.
Before the decompression, the vacuum packaging bag W is in a state where the bag is in close contact with the contents A, but when the pressure is reduced, the residual air in the bag expands and a small gap is formed between the bags and the contents A (see FIG. 1). .

(4) Bag shaping process When the deaeration is completed, the cylinder 8 is operated, and
Is repeatedly rocked up and down. As a result, the vacuum packaging bag W is struck lightly on the contact member 9 with a feeling of a pom-pom, and the contents A are about to spread due to the vibration, and at that time, the empty side is inclined downward with the gravitational force. By the action, it moves to the bag mouth side and spreads. Furthermore, when being struck, the vacuum packaging bag W may be sandwiched in parallel by the receiving table 4 and the contact member 9, so that the vacuum packaging bag W is leveled and the contents A are evenly distributed in the bag (see FIG. 3). In addition, if the contents A are relatively easy to spread in the bag, even if the cradle 4 is operated with a feeling of pressing rather than hitting, the distribution can be evenly distributed. Can also be used in combination.

(5) Air Return Step in the Chamber The switching valve is switched to reduce the inside of the chamber to the atmosphere. (6) Chamber lid raising step (7) Packaging bag discharging step The chamber main body 2 is inclined outward and the vacuum packaging bag W is slid from the receiving table 4 onto the discharge conveyor 13 and carried out.

The above-described vacuum shaping apparatus shows one embodiment, and it goes without saying that various modifications can be made. As an example, the contact member and / or the pedestal is not a plate but has a similar function, for example, a structure in which a plurality of rod-shaped members are arranged. The contact member is attached to the chamber lid via a spring, and the chamber lid itself. Inclining the inner surface of the to use as a contact member,
A vibration device for changing the inclination angle of the contact member and the receiving member, changing the number of swings of the contact member, and vibrating one or both of the contact member and the receiving member is installed. Vibration is applied in a state where the packaging bag is pressed against the contact member. A cam installed around the rotor and a cam guide that follows the cam are used as driving means (this is the same mechanism as the opening and closing of the chamber lid). The upper end of the cam guide is inserted into the chamber, and the pedestal is driven by the vertical movement. And the like.

[0020]

According to the present invention, the distribution of contents in a vacuum-sealed bag with the contents being offset to one side of the bag is efficiently uniformized in the bag, and the bag is flattened. Can be leveled. Therefore, it is possible to obtain a vacuum packaging bag which has good appearance, has a high sterilizing effect when sterilized, and can be properly packed in a box.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vacuum chamber according to the present invention;
It shows a state before the shaping operation of the bag after the pressure in the chamber is reduced.

FIG. 2 is a side sectional view thereof.

FIG. 3 shows a state during or after the shaping operation of the bag.

FIG. 4 is an overall explanatory view of a rotary vacuum shaping apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal vacuum chamber 2 Chamber main body 3 Chamber lid 4 Cradle 8 Cylinder 9 Contact member

Claims (4)

[Claims] 1. A vacuum-sealed and wrapped bag is loaded into a vacuum chamber and placed on a pedestal with the contents leaning to one side of the sack, and the pedestal is driven up and down to move the one of the bags. A method for shaping a vacuum packaging bag, characterized in that the device is hit and / or pressed against an abutting member installed above while being inclined with its side up, and this is repeated to make the distribution of contents uniform in the bag. . 2. The vacuum packaging bag according to claim 1, wherein when the bag on the receiving stand is pressed and / or hit against the contact member, the receiving stand is substantially parallel to the contact member. Shaping method. 3. A vacuum packaging bag shaping apparatus for equalizing the distribution of contents in a vacuum-sealed package in a state in which the contents are shifted to one side of the bag. The contact member is installed at an angle and a receiving stand for the vacuum packaging bag is installed below the contact member, and the receiving table is swung up and down between a horizontal position and an inclined position raised so as to be substantially parallel to the contact member. An apparatus for shaping a vacuum packaging bag, wherein the shaping apparatus is free and further comprises a driving means for swinging the receiving table. 4. A plurality of vacuum chambers arranged at equal intervals on a horizontally rotating rotor, and supply of vacuum packaging bags, degassing of chambers, shaping of bags, etc. while each vacuum chamber rotates. A vacuum-packing bag rotary type shaping device for making the distribution of the contents of the vacuum-sealed package uniform in the bag in a state where the contents are shifted to one side of the bag. A contact member is installed in a vacuum chamber at an angle, and a cradle for a vacuum packaging bag is provided below the cradle, and the pedestal is moved between a horizontal position and an inclined position raised so as to be substantially parallel to the abutment member. A rotary shaping device for vacuum packaging bags, characterized in that the device is capable of swinging up and down and further provided with a driving means for swinging the receiving table.