JPH06122419A - Method for shaping vacuum packaging bag - Google Patents

Abstract

PURPOSE:To shape a vacuum packaging bag in which a powder/granular object is vacuum-packaged to be a shape which is suitable for bag packing or pallet handling. CONSTITUTION:After mounting an appropriate number of packaged powder/ granular objects A on the upper surface of a packaged powder/granular object supporting plate 9, a lid body 15 is closed, and then, by operating a vacuum pump, air in a space which is formed by the lid body 15 and a lower container 7 is discharged, and at the same time, the packaged powder/granular objects A are pressed by lowering a pressing plate. In addition, the packaged powder/ granular object supporting plate 9 is vibrated under this condition by a vibration device to shape the packaged powder/granular objects A so as to have a specified thickness, and after the shaping is completed, the air pressure in the space is returned to the atmospheric pressure, and the packaged powder/granular objects A are kept under the shaped condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing powder granule obtained by filling cereals, beans and the powder thereof in a breathable packing bag with a predetermined weight of 10 kg, 20 kg or the like after degassing. The present invention relates to a method of shaping a vacuum packaging bag for shaping to be suitable for handling pallets and the like.

[0002]

2. Description of the Related Art Conventionally, grains, beans, etc. are filled in an air-impermeable packaging bag and sealed, and the air in the bag is removed as much as possible to improve the preservation condition of the grains as the contents. Has been done. However, when the air in the bag is removed by vacuum deaeration, the contents of the package are solidified and do not spread to every corner of the bag, and the thickness is not constant. For this reason, there has been a problem that it is difficult to pack the vacuum degassed packaging bag as it is. A method for solving this problem is disclosed in JP-A-54-54790. In the "method for shaping packed grains suitable for pallet handling" of this publication, an air-impermeable packaging bag in which grains and the like are filled and packed is supplied between a vibrating conveyor device and a shaping belt located above it. After shaping the grains in the packaging bag to a certain packaging thickness, while moving this packaging bag with a conveyor device, it is pierced by the needle of the suction cup with a needle that is placed above it and moves at the same speed as the packaging bag. In this way, most of the residual air in the packaging bag is degassed. The method disclosed in the above publication does not shape the vacuum degassed packaging bag but degass the packaging powder granules after shaping.

[0003]

SUMMARY OF THE INVENTION As described above, conventionally,
After shaping the packaging powder granules, it is possible to deaerate by removing the air inside, but there is a problem that the packaging powder granules cannot be shaped after degassing.

In view of the above, it is an object of the present invention to provide a method for shaping a vacuum packaging bag which enables shaping of the packaging powder granules after vacuum deaeration.

[0005]

In order to achieve the above object, the following method for shaping a vacuum packaging bag was created. That is, according to the present invention, after a vacuum packaging bag in which a desired amount of powdery or granular material is vacuum packaged is housed in an airtight container, the atmospheric pressure in the container is lowered so as to be substantially equal to the internal pressure of the vacuum packaging bag. Then, the vacuum packaging bag is oscillated from the outside while being pressed and shaped, and when shaping is completed, the atmospheric pressure in the container is returned to atmospheric pressure and the vacuum packaging bag is maintained in a shaped state. .

[0006]

According to the above-mentioned vacuum packaging bag shaping method, when the atmospheric pressure in the container becomes substantially equal to the internal pressure of the vacuum packaging bag, the powdery or granular material is changed from the solidified state under the atmospheric pressure to the flowable state. Change. In this state, the vacuum packaging bag to which vibration and pressure are applied is easily deformed to have a predetermined thickness. After that, when the atmospheric pressure in the container is returned to the atmospheric pressure, the vacuum packaging bag remains in the shaped shape and is solidified by the atmospheric pressure.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. 1 to 5, reference numeral 1 denotes a machine base of a decompressing and shaping device for packed powder and granular materials after deaeration.
There is a pair of stanchions 2, 2 having a predetermined height. Both columns 2 and 2 are arranged in parallel at a predetermined interval,
The lower part and the upper part have the same length, and a pair of lower arms 3 and 3 protruding forward from the columns 2 and 2 and upper arms 4 and 4 are fixed to each other. The front and rear ends of the lower arms 3 and 3 are connected by front and rear lower connecting bars 5 and 5, which are longer than the lower arm 3. The front ends of the upper arms 4 and 4 are connected by an upper connecting bar 6 having the same length as the lower connecting bar 5.

A lower container 7 having a lateral length longer than the front-rear direction and having an open upper portion is attached to the upper portion of the machine base 1. The lower container 7 has a predetermined depth, and a flange 8 projecting outward is formed on the upper four circumferences thereof. Inside the lower container 7, the side wall 7 of this container 7
a rectangular packing powder granule support plate 9 having a predetermined gap with a
(Hereinafter referred to as a support plate), the support plate 9 is a lower container 7
Are arranged along the front and rear portions of the bottom plate 7b, and are horizontally supported by an appropriate number of coil springs 10 positioned by respective stoppers 11 fixed to the bottom plate 7b. A vibrating device 12 which is operated by a signal output from a control box 46 described later is attached to a central portion of a lower surface of the support plate 9, and a lower portion of the vibrating device 12 is located below a bottom plate 7b from a hole 13 formed in the bottom plate 7b. Overhangs.

In the central portion of the lower surface of the bottom plate 7b of the lower container 7,
The second bottom portion 14 is airtightly fixed. This second bottom 1
4 has a predetermined depth (see FIG. 3), and its bottom plate 14 a is located below the vibration device 12. The lid 15 that covers the upper surface of the lower container 7 has a side wall 15 a higher in height than the side wall of the lower container 7, and the flange 16 formed at the lower end thereof has the same shape as the flange 8 of the lower container 7. And
A rubber seal 17 is adhered to the lower surface of the flange 16. A circular hole 2 is formed in the center of the upper plate 15b of the lid body 15.
1 is opened, and with the round hole 21 being covered, the bottomed cylindrical cylinder cover 18 hermetically seals the lower flange portion 18a to the upper plate 15b with an appropriate number of bolts (not shown). It is installed.

Inside the cylinder cover 18, there is a first
A cylinder 19 is provided, and a tip of a rod 20 thereof penetrates a round hole 21 of the upper plate 15b and projects into the lid body 15. The support plate 9 is attached to the tip of the rod 20.
A pressure plate 22 having the same shape as that of is attached. A lower rubber plate 23 and an upper rubber plate 24 made of hard rubber are bonded to the upper surface of the support plate 9 and the lower surface of the pressure plate 22, respectively. Since a pair of hinges 25, 25 are attached to the rear portions of the lid 15 and the lower container 7, the lid 15 can be opened and closed with respect to the lower container 7.

A second cylinder 26 for opening and closing the lid 15.
Is attached to a U-shaped bracket 49 fixed to the rear center of the second bottom portion 14 by a pair of bolts 50 so as to be swingable. The rod 27 of the second cylinder 26 extends upward, and the tip of the second cylinder 26 has a U-shaped joint fitting 2
9 is attached. This joint fitting 29
It is connected with a connecting fitting 30 formed in the center of the rear part of the lid 15 and a bolt 31. Therefore, the second cylinder 2
When 6 operates, the lid 15 is opened and closed.

First and second switching valves 32 and 33 are attached to the lateral plate 28 at the side of the second cylinder 26 (to the left in FIG. 2) (see FIG. 4). The first and second switching valves 32 and 33 are the oil filter 34 and the hydraulic hose 3.
5 is connected to a hydraulic pump (not shown) via
The first switching valve 32 is made up of the upper tube 36 and the lower tube 37 into the first cylinder 19, and the second switching valve 33 is made up of the upper tube 38 and the lower tube 39 in the second cylinder 2.
6 are connected respectively.

The three-way switching valve 40 is attached to the right end of the horizontal plate 28. The three-way switching valve 40 is connected to a vacuum pump 42 whose degree of vacuum can be adjusted by a first air hose 41, and is also connected to a second bottom portion 14 via an air filter 43 and a second air hose 44. An intake pipe 45 is further attached to the three-way switching valve 40.

The control box 46 is attached to the outside of the column 2 on the side where the three-way switching valve 40 is fixed. The control box 46 is provided with a device (not shown) for instructing switching of the first and second switching valves 32, 33 and the three-way switching valve 40. The vacuum gauge 47 is attached to the cylinder cover 18 to measure the degree of vacuum in the space S formed by the lower container 7 and the lid 15, and the casters 48 are provided below the four corners of the machine base 1. Each is installed.

Next, the operation of this embodiment will be described. First, the lid 15 is opened, and the upper rubber plate 24 of the support plate 9 is opened.
An appropriate number of the packaging powder granules A are placed in parallel on the upper surface of the, as shown by the chain double-dashed line in FIG. Here, the packaging powder granules A are obtained by filling the packaging granules C with the powder granules C and then removing air from the bag B.

Then, the vacuum degree of the vacuum pump 42 is adjusted to be the same as the pressure inside the packaging powder A, and a starting switch (not shown) in the control box 46 is turned on to turn the vacuum pump 42 on. While operating, the oil sent from the hydraulic hose 35 flows into the second cylinder 26 via the second switching valve 33 and the lower tube 39. As a result, the second cylinder 26 operates and its rod 27 pushes up the joint fitting 29, so that the lid body 15 closes and the upper surface of the lower container 7 is sealed. When the lid 15 is closed, the first cylinder 19 operates to lower the pressing plate 22, so that the lower rubber plate 23 below the pressing plate 22 is packed powder granules A.
Press. At the same time, the three-way switching valve 40 is switched, and the first air hose 41 connected to the vacuum pump 42 is connected.
To the second air hose 44 connected to the second bottom portion 14. By this communication, the air in the space S formed by the lid 15 and the lower container 7 is discharged by the vacuum pump 42, so that the atmospheric pressure thereof decreases and becomes substantially the same as the atmospheric pressure in the packaging powder and granular material A. For this reason, since the packaging powder / granular substance A loses the pressure of the atmosphere to the powder / granular substance C in the packaging bag B, the powder / granular substance C becomes in a fluid state. Lid 15
As the air pressure in the lower container 7 decreases, the vibrating device 12 operates for a short time to vibrate the support plate 9 in the vertical and lateral directions, so that the granular material C is pressed by the pressure plate 22 and vibrating device 12. At the same time, the packing bag B is filled with the vibration due to the packing, so that the packing bag B has a constant thickness.

When the shaping of the packaging powder granules A is completed as described above, the three-way switching valve 40 is switched to connect the second air hose 44 to the intake pipe 45. As a result, the space S formed by the lower container 7 and the lid 15 communicates with the outside air via the second air hose 44 and becomes atmospheric pressure. At the same time, the first switching valve 32 and the second switching valve 33
And the oil is pressed into the first cylinder 19 and the second cylinder 26 from the lower tube 37 and the upper tube 38 of each switching valve, and each cylinder 19 and 2
The oil in 6 is the upper tube 36 and the lower tube 3
It is discharged via 9 through the outside. As a result, the pressing plate 22 rises and the lid 15 opens, so that an appropriate number of the packaging powder granules A on the support plate 9 are taken out from the lower container 7.
In this way, the packaging powder granules A are successively shaped in appropriate numbers.

The first and second switching valves 3 in the above description
Switching of 2, 33 and 3-way switching valve 40 and vibration device 1
The start and stop of No. 2 are performed by a microcomputer (not shown) provided in the control box 46.

As described above, in the present embodiment, after the deaerating of the packaging powder granules A obtained by filling and sealing the air-impermeable packaging bag with the powder granules, a pressure substantially the same as the internal pressure thereof is generated. Since it was decided to vibrate while pressing in the decompression shaping device, the powder and granules in the packaging bag will be in a flowable state as before deaeration, and the powder and granules will be pressed and vibrated from the outside of the bag. Is filled into every corner of the bag and shaped into a uniform thickness.

[0020]

As described above, according to the present invention, the vacuum packaging bag is shaped into a certain thickness in the vacuum packaged state and maintains its shape even when returned to atmospheric pressure. Therefore, there is an effect that subsequent bag packing and pallet cargo handling become extremely easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a shaping device according to an embodiment.

FIG. 2 is a rear view of the shaping device according to the embodiment.

FIG. 3 is a cross-sectional view of a main part of the shaping device according to the embodiment.

FIG. 4 is an enlarged view of a switching valve unit of the shaping device according to the embodiment.

FIG. 5 is an enlarged view of a three-way switching valve portion of the shaping device of the embodiment.

[Explanation of symbols]

 1 Machine Stand 7 Lower Container 9 Packing Powder Granular Material Support Plate (Support Plate) 12 Vibration Device 15 Lid 19 First Cylinder (Actuator) 22 Pressurizing Plate 26 Second Cylinder 41 First Air Hose 42 Vacuum Pump 44 Second Air Hose A Packing powder granules after degassing S Space

Claims (1)

[Claims] 1. A vacuum packaging bag in which a desired amount of powdery or granular material is vacuum-packaged is housed in an airtight container, and then the atmospheric pressure in the container is lowered so as to be substantially equal to the internal pressure of the vacuum packaging bag. A vacuum characterized in that the vacuum packaging bag is pressed while being vibrated from the outside to be shaped, and when shaping is completed, the atmospheric pressure in the container is returned to atmospheric pressure and the vacuum packaging bag is maintained in a shaped state. How to shape a packaging bag.