JP2835475B2 - Vacuum packaging bag shaping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum packaging bag shaping apparatus for automatically flattening vacuum-packaged packaging bags containing, for example, cooked foods.

[0002]

2. Description of the Related Art When vacuum-packing an object to be packed, the object to be packed is filled by holding the opening of the packaging bag facing upward, and then the air in the bag is evacuated in a vacuum chamber. It is common to pull out and seal the opening.

[0003] Therefore, the shape of a vacuum-packed packaging bag is as follows:
As shown in FIG. 6, the packaged object Q is shifted to the bottom of the packaging bag P, which is not only unfavorable in appearance but also hinders the subsequent exterior, storage, and distribution stages. Become.

[0004] Therefore, a shaping operation for flattening the packaging bag P after vacuum packing is required. This shaping operation requires handling when the article to be packaged Q is a soft substance such as boiled beans. It is troublesome and difficult to automate.

[0005] Automating the shaping operation of vacuum-packaged packaging bags has been conventionally known in the field of handling hard articles such as rice grains and coffee beans. For example, Japanese Patent Application Laid-Open No. Sho 63-317430 discloses the technique. JP-A-1-124518
And JP-A-1-182218.

[0006] These conventional systems flatten the package by pressing it with a flat plate while applying vibration to the package under vacuum packaging. This method is applicable when the object to be packaged is a hard article, but it is soft and soft. Not applicable for viscous articles. The reason is that there is a 90 ° shift between the direction of pressing with a flat plate and the direction of movement of the packaged object in the packaging bag, and the movement is permitted in most of the four directions. This is because the object to be packaged is difficult to move in the bag, and if the member dares to move, the soft material is crushed or broken, or the outer skin peels off, losing the commercial value. Therefore, conventionally, in the case where the article to be packaged is a soft and viscous article, the flattening work is exclusively performed manually.

[0007]

As described above, in the conventional example, when the vacuum-packaged packaged material is a soft and viscous substance, the work of flattening and shaping the packaging bag is performed only manually. In addition to this, the efficiency is low and the cost is high, and it is also an obstacle to automation of subsequent outer packaging and automatic stacking packaging.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum packaging apparatus capable of automatically and efficiently performing a flattening and shaping operation after vacuum packaging without deteriorating the quality even if the article to be packaged is soft and viscous. A bag shaping device is provided.

[0009]

A vacuum packaging bag shaping apparatus according to the present invention for achieving the above object has a vacuum chamber constituted by a receiving plate and a lid provided to be able to move up and down with respect to the receiving plate. After carrying the packaging bag on the receiving plate, the lid is moved down to seal the inside of the vacuum chamber, and the inside of the vacuum chamber is evacuated to create a micro-pressure space in the packaging bag. A vacuum packaging bag shaping apparatus for flattening by moving the object to be packaged within the packaging bag by pressing and moving a press roller provided in a vacuum chamber to the packaging bag, wherein the lid is formed. A holding sheet stretched on the inner wall of the body via a spring is arranged so that at least a part thereof is in contact with the upper surface of the packaging bag on the receiving plate when the lid is lowered, and presses the press roller with the holding member. From above the sheet By horizontally moving the stretched direction by the ring, characterized in that shaping the articles to be packaged.

[0010]

In the vacuum packaging bag shaping apparatus having the above-described structure, the air bubbles slightly remaining in the vacuum-packaged packaging bag are inflated in the vacuum chamber to form a micro-pressure space in the packaging bag, and the packaging bag is formed to a predetermined pressure. At the position, it is gradually and gently pressed with directionality to move the article to be packaged in the packaging bag almost uniformly and flatten the entire packaging bag. The holding sheet is provided so that the lower surface of the holding sheet is in contact with the upper surface of the packing bag when the lid moves down. Sandwich.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS.

FIG. 1 shows an embodiment of a vacuum packaging bag shaping apparatus according to the present invention, in which a receiving plate 2 is arranged below a conveyor belt 1 for transporting a vacuum-packaged packaging bag P, and an upper side of the receiving plate 2. The cover 3 is installed so as to be able to move up and down with the conveyor belt 1 interposed therebetween. In addition, the conveyor belt 1 is provided with a hole as appropriate to prevent floating during evacuation.
The lid 3 is raised and lowered by a lid lifting / lowering drive mechanism 4 using a fluid cylinder or the like, and an airtight packing 5 is provided around the entire periphery of the lid 3. An air hose 6 and a switching valve 7 are provided inside the lid 3. The vacuum pump 8 is used to evacuate the air.

In the lid 3, a pressing sheet 9 which comes into contact with the packaging bag P and a press roller 10 which presses the pressing sheet 9 are provided as gradual pressing means for gradually pressing the packaging bag P from one end. Is provided. As shown in FIG. 2, the holding sheet 9 is arranged obliquely so as to gradually narrow the interval with respect to the receiving plate 2, and both ends thereof are attached to the inner wall of the lid 3 via springs 11. On the other hand, the press roller 10 is configured to be able to reciprocate by a driving mechanism (not shown) in parallel with the traveling direction of the conveyor belt 1 while rotating or not rotating, and is stretched diagonally as shown in FIG. The pressing sheet 9 is pressed from the lower side to the upper side so as to be substantially parallel to the upper surface of the receiving plate 2 as shown in FIG. 1 to gradually press the packaging bag P from one end. .

The vacuum-packaged packaging bag P is placed on the conveyor belt 1 such that the side to which the packaged object Q is biased, that is, the bottom side of the packaging bag P, is forward. At the time of the ascending state, the packaging bag P is transported from the position A to the position B in FIG. 1 and stopped.

Next, the lid 3 is moved downward by the lid lifting / lowering drive mechanism 4, and the inside of the lid 3 is closed, that is, the vacuum chamber is closed by the lid 3, the packing 5, the conveyor belt 1, and the receiving plate 2. In this state, as shown in FIG.
Is located on the front side in the lid 3, and the pressing sheet 9 lightly presses only a part of the packaging bag P to prevent the packaging bag P from being displaced. Then, when the inside of the lid 3, that is, the inside of the vacuum chamber is evacuated by the vacuum pump 8, the minute air bubbles remaining in the packaging bag P gradually approach the surrounding pressure, and the packaging bag P is caused by a slight differential pressure. As a result, a large pressure space S is formed in the rear part of the packaging bag P as shown in FIG. In this state, the article to be packaged Q that has been biased toward the front of the packaging bag P can easily move to the micro-pressure space S.

When the conveyor roller 1 is moved in the direction opposite to the direction in which the conveyor belt 1 is fed as shown in FIG. The pressing sheet 9 stretched diagonally by the press roller 10 from the side where
The object Q to be packaged, which is gradually gently pressed through the front side of the packaging bag P and is biased toward the front portion of the packaging bag P, is smoothly moved to the micro-pressure space S formed behind, and the packaging bag P is shown in FIG. Is flattened as follows. When the movement of the press roller 10 is completed, the switching valve 7 is switched to bring the pressure in the lid 3 to atmospheric pressure.

As described above, the holding sheet 9 is stretched by the spring 11 and the lower surface of the holding sheet 9 is provided so that the lower surface of the holding sheet 9 contacts the upper surface of the packaging bag P when the lid 3 moves down, so that shaping is performed. Prior to this, the holding sheet 9 gently presses a part of the packing bag and the packing bag P is sandwiched between the conveyor belt 1, so that the packing bag P is securely positioned in the vacuum chamber, and during shaping, No misalignment occurs. That is, with the lateral movement of the press roller 10, the packaging bag P slides on the conveyor belt 1 in the horizontal direction, and as a result, the shaping operation ends without being able to perform the shaping sufficiently, thereby causing a shaping defect. Can be reliably prevented.

When the inside of the lid 3 becomes atmospheric pressure, the slight air that has formed the large micro-pressure space S in the packaging bag P returns to the original fine bubbles, so that the packaging bag P is flattened. Is stabilized. Thereafter, the cover 3 is raised by the cover lifting drive mechanism 4 to open the vacuum chamber and press the roller 1.
0 is returned to the original position, then the conveyor belt 1 is driven to discharge the flattened packaging bag P, and the next packaging bag P at the position A in FIG. Will be repeated.

In this embodiment, one press roller 10
5 is used, but as illustrated in FIG. 5, two or more press rollers 10
Roller 10 so that the pressing force gradually increases every
The distance between the plate and the receiving plate 2 may be changed as appropriate.

Further, springs may be interposed at both ends of the press roller 10 so as to reduce the pressure applied to the packaging bag P from being applied more than necessary. Further, the springs 11 interposed at the ends of the holding sheet 9 are not always attached to both ends of the holding sheet 9, and there is no problem even if only one side is provided.

The drawing shows the case where the packaging bags P are processed one by one. However, in order to improve the efficiency, the packaging bags P at the positions A and B are arranged in a plurality of rows, respectively, Or a combination of these methods. Further, it is preferable that the height of the press roller 10 can be arbitrarily set from the outside in order to adjust the pressing thickness of the package Q.

[0022]

As described above, the vacuum packaging bag shaping apparatus according to the present invention gradually and gradually presses the objects to be packaged in the vacuum-packaged packaging bag with the press roller via the holding sheet, thereby forming the package. Since the package can be easily moved to the micro-pressure space side, even if the package is a soft and viscous substance, it can be easily flattened without adversely affecting the quality, and Since the pressing is performed by the press roller via the pressing sheet, the occurrence of wrinkles or the like on the packaging bag is also minimized. In addition, the shaping operation, which conventionally took a long time by hand, can be automated and performed efficiently and reliably, which can greatly contribute to automation of external packaging and automatic stacking packaging in a post-process.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is a sectional view showing a state before vacuum in a vacuum chamber.

FIG. 3 is a cross-sectional view of the vacuum chamber in a vacuum state.

FIG. 4 is an explanatory diagram for flattening a packaging bag.

FIG. 5 is a sectional view of another embodiment.

FIG. 6 is a sectional view of an original packaging bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor belt 2 Receiving plate 3 Lid 4 Lid lifting / lowering drive mechanism 8 Vacuum pump 9 Holding sheet 10 Press roller 11 Spring P Packaging bag Q Packaged material

Claims (1)

(57) [Claims] 1. A vacuum chamber comprising a receiving plate and a lid provided to be movable up and down with respect to the receiving plate,
After loading the packaging bag on the top, move the lid down to
The inside of the vacuum chamber is sealed and the vacuum chamber is
The inside is evacuated to form a micro-pressure space in the packaging bag,
Pressing a press roller provided in an empty chamber against the packaging bag
By moving, the article to be packaged is moved within the packaging bag.
A vacuum packaging bag shaping device for moving and flattening,
Pressing sheet stretched on the inner wall of the lid via a spring
At least a part of which is received when the lid is lowered.
Placed in contact with the top surface of the packaging bag on the board,
Press the less roller from above the holding sheet with the spring
Horizontal movement in the stretching direction by the
Vacuum packaging bag shaping device for shaping objects .