JP2003335303A - Degassing method and apparatus for packaging bag in which rice is mainly filled and sealed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exactly completely discharge residual gas in a tightly sealed bag to the outside via permeable perforations formed in at least one of upper and lower edges of the tightly sealed bag by making a pair of belt conveyors of the degassing apparatus close to each other, compressing the bag from upper and lower surfaces and finely vibrating it. <P>SOLUTION: The pair of clamping type belt conveyors 11 and 12 are arranged close to each other to narrow a space between packaged bag transporting areas 13 and 14 to the extent that the tightly sealed bag is not broken by starting an electric motor 22 and sliding other edge of each of links 20 and 21 in long holes 18 and 19 respectively to make the links 20 and 21 fall down, and then the fine vibration transportation table 16 is started. The tightly sealed bag B is rapidly exactly degassed by a synergetic effect by the compression of the pair of the clamping type belt conveyors 11 and 12 and fine vibration by the fine vibration transportation table 16. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for degassing a packaging bag in which an object to be packaged is filled and sealed.

[0001]

2. Description of the Related Art Conventionally, since grains such as rice are filled in a plastic bag and air is mixed in the hermetically sealed bag, an external pressure is applied to the hermetically sealed bag to remove air from the packaging bag. Qi means device is made.

[0002]

SUMMARY OF THE INVENTION In the above-mentioned conventional one,
Since the air is evacuated from this sealed bag only by the external pressure, it is difficult to evacuate the air effectively and quickly. If the sealed bag becomes larger than 30 kilograms, the air can be easily evacuated. I can't. SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to reliably and easily perform air bleeding of a sealed packaging bag by applying a slight vibration together with an external pressure.

[0003]

In order to solve the above-mentioned problems, the specified invention supplies a sealed bag mainly formed by hermetically sealing a rice grain package to a deaerator equipped with a pair of belt conveyors. The pair of belt conveyors in the deaeration device are brought close to each other, and the hermetically-sealed bag is compressed from the upper and lower surfaces, and microvibration is applied to form an exhaustable perforated line formed on the upper edge of the hermetically-sealed bag. The air in the hermetically sealed bag is evacuated to the outside through a seal portion.
The gist of the present invention is a method and apparatus for degassing a packaging bag.

Of the pair of belt conveyors, at least one of the belt conveyors is preferably degassed from the hermetically-sealed bag by vibrating the bag-conveying zone at a frequency of 50 Hz at 3000 times per minute.

To seal the packaging bag, a seal portion is formed on the upper edge of the packaging bag, and the air in the sealing bag formed in the packaging bag can be discharged during the compression. Is efficient.

The related invention is a device which is arranged on the downstream side of a carrying-in device for carrying in a hermetically-sealed bag mainly composed of rice grains and which vents air from the hermetically-sealed bag.
It is provided with a pair of belt conveyors arranged so that they can move toward and away from each other, and these belt conveyors have mutually parallel bag-conveying areas, and a parallel movement mechanism for adjusting the distance between these belt conveyors moves close to and away from each other. Of the pair of belt conveyors, a micro-vibration transfer table is disposed in the packaging transfer area of at least one of the pair of belt conveyors, and a vibration-damping rubber that absorbs vibration during this vibration is The degassing device for a packaging bag is characterized in that it is provided on the back surface of the vibrating transfer table.

The parallel movement mechanism is provided with a long hole provided in a machine frame parallel to the wrapping bag conveyance area of each belt conveyor and a link of the same length intersecting at the center, and one end of each link is the belt. It is structurally simple that the other end of each link is pivotally attached to the machine frame of the conveyer, and the other end of each link is composed of a drive source for spacing adjustment. This drive source is one of an electric motor, a fluid pressure cylinder device, or a manual drive.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION
1 is a representative embodiment of the described apparatus invention. 1, FIG. 2 and FIG. 3, 10 is arranged on the downstream side of the inclined carrying-in device A for carrying in the sealed packaging bag B formed by sealing the rice grains of the packaged object, and removing the air from the sealed packaging bag B. The deaeration device to care is shown. The degassing device 10 is arranged such that the carry-in side is lower than the carry-out side and is tilted upward, and the tilt angle is about 10 degrees in elevation. The degassing device 10 is provided with a pair of pinching type belt conveyors 11 and 12 that are arranged so that they can be adjusted toward and away from each other. These belt conveyors 11 and 12 have mutually parallel bag transporting areas 13 and 14, and a parallel movement mechanism 15 for adjusting the distance for moving these belt conveyors 13 and 14 toward and away from each other is a machine of the belt conveyors 11 and 12. It is arranged across the frames. That is, the machine frame of the lower belt conveyor 12 is fixed to the frame 10a of the degassing device 10, and the machine frame of the upper belt conveyor 11 is the degassing device by the action of the parallel movement mechanism 15. Lower belt conveyor 1 fixed to a pedestal 10a of 10
It is deployed so that it can approach and separate from the machine frame in 2. Of these belt conveyors 11 and 12, the packaging bag conveying area 13 on the upper belt conveyor 11 supports the receiving roller whose axis is horizontal and supports the back surface of the endless conveyor belt at intervals along the conveying direction of the belt conveyor 11. The endless conveyor belt is a packaging bag transport area 1
3, the receiving rollers are supported from the back side thereof. Further, in the direction in which the lower belt conveyer 12 conveys a bag, unlike the upper belt conveyer 11, the receiving rollers are not arranged in the entire area, but are arranged at the carry-in and carry-out end portions, and the middle thereof is not provided. In the section, a micro-vibration transfer table 16 described below is arranged on the back side of the endless conveyor belt. A vibrator V that slightly vibrates the table 16 is arranged in the machine frame of the lower belt conveyor 12.

The micro-vibration transfer table 16 is arranged in the packaging transfer area 14 of the lower belt conveyor 12.
An anti-vibration rubber 17 that absorbs the vibration during this vibration is provided on the back surface of the micro-vibration transport table 16. The endless conveyor belt in each of the belt conveyors 11 and 12 is engaged with the receiving roller and the drive roller of the drive motors 17 and 17,
By driving the motors 17 and 17, the drive rollers are continuously rotated in one direction, and the endless conveyor belts of the belt conveyors 11 and 12 are continuously moved from the carry-in direction to the carry-out direction.

The parallel movement mechanism 15 includes elongated holes 18 and 19 provided in a machine frame parallel to the wrapping and conveying areas 13 and 14 of the belt conveyors 11 and 12, and a link 20 having the same length and intersecting at the center. 21 and one end of each link 20, 21 is pivotally attached to the machine frame of each belt conveyor 11, 12, and the other end of each link 20, 21 is slidably mounted in the elongated holes 18, 19. , The other end of the one link 21 is provided with the long hole 19
And an electric motor 22 which is a kind of drive source for adjusting the distance. If necessary, an adjusting device 23 for arranging the entire upper belt conveyor 11, that is, the machine frame in the vertical direction to move and adjust within a predetermined dimension and to roughly adjust the interval between the upper and lower belt conveyors 11 and 12 is arranged. There is. The adjusting device 23 is screwed to at least two screw rods 5 and these screw rods 25, which are provided vertically to the pedestal 10a of the degassing device 10 so as to be rotatable about the axis by the operation of the manual handle 24. It comprises a screw portion 26 formed on the machine frame of the upper belt conveyor 11 that can move up and down along with the rotation of the screw rod 25 (see FIG. 3).

The operation of the apparatus of this embodiment will be described with reference to a typical embodiment. First, the electric motor 22 is driven, and the other ends of the links 20 and 21 are slid in the elongated holes 18 and 19, so that the links 20 and 21 are started up, and the pair of nipping type belt conveyors 11 and 12 are driven. Are separated from each other, and the distance between the packaging bag conveying areas 13 and 14 is widened to the thickness of the sealed packaging bag B, and then the electric motor 22 is stopped, and an object to be packaged, for example, rice grains is filled. The vinyl sealed bag B is ready to be received. At this time, the hermetically-sealed bag B to be used is one in which a perforated seal portion capable of exhausting is formed near the upper edge of the hermetically-sealed bag B. Specifically, at least two parallel perforated seal portions C1 and C2 are the upper edges of the sealing bag B,
Alternatively, one or both of the lower edges is formed along the both edges, and a vent hole C3 through which air can be ventilated is formed in the gap between the seal portions C1 and C2 (see FIG. 2).

Then, by the carrying-in device A, the packaging bag B filled with the rice grains is supplied between the packaging bag transport areas 13 and 14, and the motors 17 in the belt conveyors 11 and 12,
By the drive of 17, the drive roller is continuously rotated in one direction,
By continuously moving the endless conveyor belts in each of the belt conveyors 11 and 12 from the carry-in direction to the carry-out direction, the sealed packaging bag B is continuously transferred to the carry-out side.

In this state, the electric motor 22 is restarted, and the other ends of the links 20 and 21 are slid in the slots 18 and 19 to the opposite side to the previous one, and the links 20 and 21 are turned down. The pair of pinching type belt conveyors 11, 1
2 are brought close to each other, the space between the packaging bag conveying areas 13 and 14 is narrowed so that the sealed packaging bag B does not burst, and the supplied packaging bag B is compressed from the upper and lower surfaces and The vibration transfer table 16 is started, and the air is expelled quickly and reliably from the sealed packaging bag B by the synergistic effect of the pressing by the pair of sandwich type belt conveyors 11 and 12 and the slight vibration of the slight vibration transfer table 16. it can. At this time, the air in the sealed envelope B filled with the rice grains is degassed from the air hole seal portion edge of the sealed envelope B through the zigzag air release gap C3 formed by the seals C1 and C2. Let

Further, when the thickness of the sealed bag B is changed or fluctuated due to its capacity, the electric motor 22 is started in accordance with the changed or changed thickness of the sealed bag B, The distance between the pair of sandwich type belt conveyors 11 and 12 is adjusted via the links 20 and 21. In addition,
If necessary, the adjusting device 23 may be used to change the interval largely.

The micro-vibration transfer table 16 is vibrated by driving the vibrator B, and the packaging transfer area 14 of the lower belt conveyor 12 is vibrated 3000 times per minute at a frequency of 50 Hz. Note that this vibration example is a preferable example obtained by the applicant through repeated tests of several orders for rice grains, but the frequencies for other grains are not limited thereto. The vibration during this vibration is absorbed by the vibration isolating rubber 17 and is not transmitted to the machine frame. In this way, while air is being degassed from the hermetically-sealed bag B, the hermetically-sealed bag B is carried out of the degassing device 10 from the carrying-out side by the operation of the pair of belt conveyors 11 and 12, for example, an auto stacker device. Carry it in (not shown), stack and store.

[0016]

According to the invention of claim 1, the pair of belt conveyors in the deaeration device are brought close to each other,
Air remaining in the hermetically-sealed bag can be completely externalized through the exhaust and flowable perforated seals formed on at least one of the upper and lower edges of the hermetically-sealed bag. Can be deflated.

In the invention according to claim 2, the synergistic effect of vibrating the packaging conveyance area of at least one of the pair of belt conveyors at a frequency of 50 Hz at a frequency of 50 Hz makes the effect more effective. It can be remarkably demonstrated.

The item to be packaged is mainly rice grains, and even if the volume thereof is large, air can be reliably and easily vented from the sealed packaging bag to the outside.

By applying the compression and the slight vibration,
The air in the sealed packaging bag can be efficiently exhausted from the upper and lower edges of the packaging bag to the outside through the ventilation part of the seal portion formed in the packaging bag.

As described in detail above, the degassing device of the present invention is
Equipped with a pair of sandwich type belt conveyors arranged so that they can be moved toward and away from each other, these belt conveyors have mutually parallel parcel-conveying areas, and a parallel movement mechanism for adjusting the distance to move these belt conveyors toward and away from each other is provided. Disposed between machine frames of these belt conveyors, a micro-vibration transfer table is arranged in the packaging transfer area of at least one of the pair of belt conveyors, and is a vibration proof that absorbs vibration during this vibration. Since the rubber is provided on the back surface of the micro-vibration transfer table, these belt conveyors are brought close to each other, and the micro-vibration of the micro-vibration transfer table is applied to the sealed packaging bag while compressing the bag from the front and back sides. Air can be quickly removed from the sealed bag. In addition, even if the thickness of the sealed bag changes, it can be handled by adjusting the interval between these belt conveyors according to the change in the thickness of the sealed bag. You can handle a bag. Further, the parallel movement mechanism includes a long hole provided in a machine frame parallel to the bag-carrying and conveying area of each belt conveyor and a link of the same length intersecting at the center, and one end of each link is the belt conveyor. Suitable for being connected to the frame of the vehicle, the other end of each link being slidably mounted in the slot, and a drive source for adjusting the distance for moving the other end of the link along the slot. In addition, the effect is remarkable as a deaeration device having a function of allowing the pair of belt conveyors to approach and separate from each other.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an entire embodiment.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a schematic side view of a deaeration device portion in FIG.

FIG. 4 is a plan view showing a sealed portion of the sealed packaging bag.

[Explanation of symbols]

10 Degassing device 11, 12 Belt conveyor

Claims (4)

[Claims] 1. A deaeration means for supplying a packaging bag mainly filled with rice grains to a conveying device facing a pair of upper and lower belt conveyors, and discharging air in the sealed packaging bag during conveyance. While compressing the pair of belt conveyors from the upper and lower sides, the air inside the packaging bag can be evacuated through the air dischargeable seal part that seals the packaging bag by the synergistic effect of applying slight vibration to the packaging bag. A method and an apparatus for degassing a packaging bag mainly filled with rice grains and sealed. 2. The air in the hermetically sealed bag is evacuated by vibrating the baggage conveying area of at least one of the pair of belt conveyors at a frequency of 50 Hz for 3000 times per minute. The degassing method of the packaging bag according to claim 1. 3. The sealed packaging bag according to claim 1 or 2 is arranged on the downstream side of the carry-in device, and the degassing device for degassing the air in the sealed packaging bag is arranged so as to approach and separate from each other. Equipped with a pair of upper and lower belt conveyors, these belt conveyors have mutually parallel wrapping and conveying areas, and a parallel movement mechanism for adjusting the distance to move these belt conveyors away from each other is between the machine frames of these belt conveyors. A micro-vibration transfer table is arranged in the packaging transfer area of at least one of the pair of belt conveyors, and a vibration-damping rubber that absorbs vibration during this vibration is provided on the back surface of the micro-vibration transfer table. A deaeration device for a packaging bag mainly filled and sealed with rice grains, which is provided. 4. The parallel movement mechanism according to claim 3 is provided with a long hole provided in a machine frame parallel to the envelope conveying area of each belt conveyor and a link of the same length intersecting at the center. One end is pivotally attached to the machine frame of each belt conveyor, the other end of each link is slidably mounted in the elongated hole, and the drive source for spacing adjustment is arranged to move the other end of one link along the elongated hole. A deaeration device for a packaging bag mainly filled and sealed with rice grains, which comprises: