JPH0534218B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a vacuum sealing device for vacuum packaging by removing air remaining inside a packaging bag containing granular grains such as rice, and pasting a sealing material. .

[Conventional technology]

Conventionally, rice and the like are packaged in bags with air trapped in them, resulting in quality deterioration of the rice.To prevent this, rice and the like are sometimes vacuum-packed in plastic bags or the like.

The conventional vacuum packaging process for rice will be explained with reference to FIG.

(1) Weigh the rice and pack it into packaging bags.

(2) To prevent the rice from spilling from the bag opening 21, the packaging bag 20 is held down by the rod-shaped member 22 and laid down on a horizontal table. Pack them in layers so that they can be stored and transported.

(3) Air vent pipe 2 of the vacuum pump from the bag opening of the packaging bag
3 into the bag and remove the air remaining in the bag to create a vacuum.

(4) The mouth of the evacuated bag is fused using a sealing device using high frequency, etc. to close it and package it.

[Problem to be solved by the invention]

In the vacuum packaging, the vacuum is applied while the packaging bag is in an upright position, so the bag is fixed in a distorted state and cannot be flattened afterwards. Therefore, it was inconvenient for stacking the bags.

Conventionally, the packaging bag filled with rice is laid down horizontally to form a flat shape as described above, but when the bag is laid down horizontally, the rice spills out of the opening of the bag, so the opening of the bag is held down with a rod-shaped member. It must be laid down horizontally,
In addition, it is difficult and time consuming to remove air from the bag opening and close the bag opening while the bag is held horizontally.
Therefore, the work of flattening the bag body, removing air, and sealing the bag mouth takes time to match the work speed of rice bagging, making it impossible to match the work speed, resulting in poor work efficiency. An air suction device and a sealing device that fuses and seals the bag opening using high frequency waves must be installed in the same place, and the structures of the air suction device and sealing device are complicated and expensive, making it difficult to vacuum package rice. is not widespread.

The present invention is provided with an air vent cylinder having an opening in the front part thereof for evacuating air from an air vent hole of the bag body, which is in close contact with the side surface of a packaging bag in which granular grains such as rice are sealed. It is an object of the present invention to provide a vacuum sealing device having a simple structure and having a built-in means for immediately sealing the air vent hole with a sealing material.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a vacuum sealing device for a packaging bag in which granular grains such as rice are sealed and air vent holes smaller in diameter than the grains of rice or the like are bored on the surface, comprising: an air vent cylinder having an opening in its front part for evacuating from the air vent hole in close contact with the air vent hole, and an air vent cylinder having a vacuum exhaust path connected to a vacuum pump in its rear part; and an inner surface of the air vent cylinder. The sealing material is provided so as to be movable along the air vent cylinder, has an exhaust passage on the outer periphery that communicates the front and rear vacuum exhaust passages of the air vent cylinder, and is attached using a pressure difference between the vacuum exhausts. a piston-shaped sealing material holding member having a vacuum suction hole near its center for holding the air venting cylinder; a shaft that is airtightly guided by the sealing member; a pressing member that urges the shaft to which the sealing material holding member is fixed forward and pressurizes the sealing material to be applied to the air vent hole of the packaging bag; A technical means of a vacuum sealing device is provided, which is equipped with a pull-back lever that pulls back the shaft against the elastic body.

[Effect]

The opening of the air vent tube of the vacuum sealing device is brought into close contact with the packaging bag in which granular grains such as rice are sealed, and the vacuum inside the bag is completed through the air vent hole of the bag, and at the same time, Vacuum sealing is achieved by attaching the sealing material to the air vent hole while maintaining the vacuum.

〔Example〕

The present invention will be explained below based on embodiments shown in the drawings.

In Figures 1 to 3, 1 is a vinyl packaging bag filled with granular grains such as rice A, etc. and sealed by gluing the bag opening while air is still inside, and 2 is a plastic packaging bag that is sealed with air still inside. A punching tool 4 with one or more air vent holes and one or more needles, etc. at the tip.
As shown in FIGS. 3 and 6, holes can be made in a predetermined range on the surface of the packaging bag. It is preferable to provide several air vent holes 2 at one location so that air can be quickly vented. By laying the packaging bag 1 on its side as shown in FIGS. 2 and 3 and providing air vent holes 2, the packaging bag 1 can be easily shaped into a flat shape.

A vacuum sealing device 8 for removing air from the packaging bag to create a vacuum and applying the adhesive sealing material 3 under pressure will be described based on an embodiment shown in FIGS. 9 and 10.

Reference numeral 5 denotes an air vent cylinder, which has an opening (left end in FIG. 9) for evacuating air from the air vent hole 2 in close contact with the packaging bag 1 at its front part, and is connected to a vacuum pump P at its rear part. A vacuum exhaust path is formed. The front opening of the air venting cylinder 5 has a diameter that can surround the plurality of air venting holes 2, and a grip 9 is provided at the rear, to which a vacuum pump P is detachably connected. Reference numeral 7 denotes a piston-shaped sealing material holding member movably provided along the inner surface of the air vent cylinder 5, and vacuum exhaust passages are provided at the front and rear parts of the air vent cylinder 5 on the outer periphery of the piston-shaped disc. A plurality of passages 6a for evacuation are provided to communicate with each other, and a plurality of vacuum suction holes 6b for holding the adhesive sealing material 3 by the differential pressure of evacuation are provided near the center thereof.

Note that a passage 6 may be provided between the sealing material holding member 7 and the air vent cylinder 5 as a passage for exhaust air.

The adhesive sealing material 3 has an outer diameter that can close the plurality of air vent holes 2, and if the rice bag is a plastic bag, a thin vinyl sealing material is used, and one side thereof is used as the adhesive surface 3a to the bag. There is.

As a structure for advancing and retracting the sealing material holding member 7, a resilient body 10 such as a spring is provided between the air vent cylinder 5 and the sealing material holding member 7.
The shaft 11 is fixed to the back surface of the sealing material holding member 7 by always forcing the sealing material holding member 7 forward (to the left) by interposing the sealing material holding member 7 . The shaft 11, which is movable in parallel with the axial direction of the air vent cylinder 5, projects outward from the rear part of the cylinder 5 while keeping the cylinder 5 airtight. A stop member 12 is screwed onto the rear end of the shaft 11, and the upper part of a lever-type retraction lever 14, which is pivotally supported on the grip portion 9 by a shaft 13, faces in front of the stop member 12. When the lower part is pressed, the stop member 12 is moved backward against the spring 10 at the upper part, and conversely, by releasing the pressure on the lower part of the pull-back lever 14, the elastic force of the spring 10 moves the shaft 11 and the sealing material holding member 7 forward. Apply sealing material 3 to the air vent hole 2 of the packaging bag.
Perform pressure bonding. Reference numeral 15 denotes a seal ring provided at the opening at the tip of the air vent cylinder 5 so as to be able to fit closely around the air vent hole 2 of the packaging bag 1. Reference numeral 16 is a shaft bearing, and reference numeral 17 is an operation button for opening and closing an on-off valve provided in an air passage in the grip.

Next, the process of vacuuming the packaging bag containing rice will be explained.

The first step is to fill a plastic packaging bag with the measured amount of rice as shown in Figure 1, close the bag to seal it while keeping air in, and then turn the packaging bag 1 sideways as shown in Figure 2. Place the bag on a horizontal stand and insert the punching tool 4 into the surface of the bag.
to make one or more air vent holes 2 (see Figures 3 and 6). The bags are shaped flat so that they can be stacked.

In the second step, the on-off valve is opened with the operation button 17 of the grip part 9, and a suction action is performed by the vacuum pump, and the sealing material 3 to be pasted is applied to the front surface of the sealing material holding member 7 under the differential pressure of the evacuation of the vacuum suction hole 6b. The lower part of the pull-back lever 14 is pushed and the upper part is rotated rearward to move the stop member 12 back against the spring 10, with the shaft 11 and sealing material holding member 7 in the retreat position, and the air vent cylinder is moved. Create a space in the front of body 3,
The seal ring 15 at the tip is tightly pressed around the air vent hole 2 of the packaging bag body 1, and the air inside the bag is removed by the suction action of the vacuum pump from the air vent hole 2 to the front space of the air vent cylinder 5. Seal material holding member 7
The spring 10 is evacuated through the passage 6a around it and the rear vacuum exhaust passage to evacuate the bag (see Fig. 4), and the spring 10 is released by releasing the pressing force of the pull-back lever 14 while maintaining the vacuum inside the air vent cylinder. The sealing material holding member 7 is advanced forward by the elastic force of , and the sealing material 3 for sticking held on the front side of the sealing material holding member is pressure bonded and stuck to cover the air vent hole 2 of the packaging bag 1 for vacuum packaging.

Note that when advancing the sealing material holding member 7,
The adhesive sealing material 3 is made to be able to advance to a position that is flush with or slightly protrudes from the surface of the front opening of the cylindrical body 5. Further, although the seal type vacuum packaging apparatus of the embodiment is portable and can be held in hand for vacuum packaging work, the present invention is not limited to this.

〔Effect of the invention〕

According to the vacuum sealing device of the present invention, one or more air vent holes drilled in the packaging bag are surrounded, the opening of the air vent cylinder is tightly closed, and the air remaining inside the bag is suctioned and evacuated using a vacuum pump to create a vacuum. By simply pushing out the sealing material using the sealing material holding member while maintaining the vacuum inside the air venting cylinder, and sticking it to the air venting hole to close it, vacuum packaging can be done reliably, thereby preventing quality deterioration of rice, etc. can be prevented and the work efficiency of vacuum packaging can be improved. In addition, when applying the sealant, the air vent cylinder and the packaging bag are in a vacuum state and there is almost no pressure difference, so the surface to which the bag is applied becomes flat without any unevenness, and the sealant is pressed onto it. There is no risk of air entering from the area where the sealant is pasted.

Furthermore, since the packaging bag is placed upright and filled with rice, etc., and the bag is sealed with air inside, it is then laid down on its side, so the rice does not spill out, and air vent holes can be made in the horizontal bag. can be easily shaped into a flat shape. In addition, the air vent holes made in the bag body have a diameter smaller than the size of rice grains, etc., so only the air can be sucked out without rice etc. flowing out when suctioned by a vacuum pump.If the number of air vent holes is increased, the air can be Suction can be performed quickly.

The vacuum sealing device according to the present invention is small and portable as in the embodiments, so it is easy to move and easy to use, and it has a simpler structure than conventional devices, so it can be provided at a lower cost.

[Brief explanation of drawings]

Figures 1 to 5 show the vacuum packaging work process using the vacuum sealing device of the present invention.
The figure is a cross-sectional view of the state in which rice, etc. is packed into the bag, Figure 2 is a cross-sectional view of the packaging bag filled with rice, etc. laid down on its side, Figure 3 is a cross-sectional view showing the process of punching air vent holes, Figure 4 is a sectional view of the air venting process, Figure 5 is a sectional view of the process of pasting the sealing material to the air venting hole, Figure 6 is a plan view of the air venting hole of the packaging bag, and Figure 7 is the air venting hole. FIG. 8 is a perspective view of the adhesive sealing material, FIG. 9 is a partially cutaway front view showing an embodiment of the vacuum sealing device according to the present invention, and FIG. 10 is the seal. FIG. 11 is a side view of the same, and FIG. 12 is a partially cutaway front view showing a conventional vacuum packaging process. DESCRIPTION OF SYMBOLS 1...Packaging bag body, 2...Air vent hole, 3...Sealing material for pasting, 4...Punching tool, 5...Air vent cylinder, 6...Passage, 7...Sealing material holding member, 8...
...Vacuum sealing device, 10...Spring, 12...Stopping member, 14...Operation lever, A...Rice.

Claims (1)

[Scope of Claims] 1. A vacuum sealing device for a packaging bag in which granular grains such as rice are sealed and air vent holes smaller in diameter than the grains of rice or the like are perforated on the surface, the vacuum sealing device being in close contact with the packaging bag. The air vent tube has an opening for evacuation from the air vent hole in its front part, and the rear part thereof is movable along the inner surface of the air vent cylinder, which has an evacuation passage connected to a vacuum pump. and has an exhaust passage on the outer periphery that communicates the front and rear vacuum exhaust passages of the air vent cylinder, and is used to hold the sealing material for attachment by the differential pressure of the vacuum exhaust. a piston-shaped sealing material holding member having a vacuum suction hole near its center; and a piston-shaped sealing material holding member fixed to the sealing material holding member, movable in parallel to the axial direction of the air venting cylinder, and airtightly guided by the air venting cylinder. a shaft to which the sealing material holding member is fixed; a pressure body that urges the shaft to which the sealing material holding member is fixed forward and pressure-bonds the sealing material to be applied to the air vent hole of the packaging bag body; Vacuum sealing device with a pull-back lever that pulls back against the body.