JP2008285202A - Deaeration carrying device of packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the deaeration carrying device of a packaging bag which carries the packaging bag by surely evacuating air in the packaging bag filled with the content. <P>SOLUTION: The deaeration carrying device includes a pair of carrying belts 4 which carries the packaging bag by sandwiching the bag mouth part of the packaging bag, a conveyer which carries the packaging bag by supporting the bottom of the packaging bag, a pair of band plates 7 contactably and separably installed below the carrying belts 4, and supporting the packaging bag by sandwiching the bag mouth part of the packaging bag, and a pair of deaeration rollers 8 installed below the pair of the band plates 7 and capable of moving vertically and moving near to and away from each other and moving vertically in the state of moving near to each other and sandwiching the bag mouth part of the packaging bag when the pair of the band plates 7 support the bag mouth part of the packaging bag. An air vent recess 10 is formed at the surface of the band plate 7 in contact with the packaging bag. Above the band plate 7 the tracks of the surface of the carrying belt 4 in contact with the packaging bag are mutually set apart and an air vent hole 26 which vertically passes between them is formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a degassing / conveying device for a packaging bag filled with powder, granules and the like.

When packing with powder or granules in a packaging bag, sealing the bag mouth with air in it will not only cause the packaging bag to rupture, but the shape of the packaging bag will become indefinite. It is easy to cause cargo collapse.
Therefore, conventionally, a polyethylene bag into which a filler is inserted is placed on a conveyor and conveyed, and the upper part of the polyethylene bag is held by a holding member, and is relatively below the holding member so as to narrow the interval in the direction of travel of the polyethylene bag. There has been proposed a deaeration device provided with a deaeration bar that is directed and inclined so that the front end in the traveling direction is lowered by its own weight (see Patent Document 1).

The deaeration vibration device includes a deaeration vibration device directly below the conveyance belt for carrying and transporting the bag body, and includes a sandwiching belt for nipping and holding the upper opening of the bag body and conveying the upper portion of the conveyance belt. A deaeration conveyance device for a bagging machine is known in which the conveyance belt and the sandwiching band are relatively inclined so as to approach each other in the traveling direction (see Patent Document 2).
However, since these conventional degassing devices carry the upper part of the packaging bag while sandwiching and supporting it from both sides, it is difficult for the air in the bag to escape, and there is a risk that the bag will be sealed while the air remains.

Japanese Utility Model Publication No. 53-20284 Japanese Utility Model Publication No. 61-28721

  The problem to be solved by the present invention is to provide a degassing / conveying device for a packaging bag that reliably removes and conveys the air in the packaging bag filled with contents.

  A degassing and conveying apparatus for a packaging bag according to the present invention includes a pair of conveying belts that convey a bag mouth portion of a packaging bag filled with contents from both sides, and a conveyor that supports and conveys the bottom of the packaging bag. A pair of strips which are installed below the conveyor belt so as to be able to contact with and separate from each other, and sandwich and support the bag mouth portion of the packaging bag from both sides; A pair of deaeration rollers which are installed so as to be movable up and down and move up and down in close proximity to each other with the bag mouth portion of the packaging bag sandwiched between the bag mouth portion of the packaging bag, An air vent is formed on the surface in contact with the packaging bag, and an air vent hole penetrating up and down is formed above the band plate by separating the tracks on the surface of the transport belt in contact with the packaging bag from each other. is there.

The band plate and the deaeration roller are installed during the conveyance of the packaging bag by the conveyance belt and the conveyor, and the conveyance belt and the conveyor stop when the packaging bag reaches above the band plate and the deaeration roller. Sometimes.
In this case, it is preferable to provide a vibration device that applies vertical vibration to the conveyor below the belt plate and the deaeration roller.
A plurality of deaeration parts including the strip plate, the deaeration roller, and the vibration device can be provided along the conveyance path of the packaging bag.
The deaeration rollers may be lowered with a slight gap when close to each other.
It is preferable to install a presser plate that projects outward from directly under the deaeration roller so as to move close and away and move up and down in conjunction with the deaeration roller.

According to the invention which concerns on Claim 1 and 2, when raising the deaeration roller which adjoined and pushing out the air in a packaging bag, the air vent formed between the air vent recessed part formed in the strip and the conveyance belt It is surely discharged through the hole, and air does not easily accumulate in the packaging bag.
Further, since the bag mouth portion of the packaging bag is held by the belt plate, there is no fear that the packaging bag slides down or rises even when the deaeration roller is raised or lowered.
Furthermore, since the rotating deaeration roller is raised and lowered with respect to the packaging bag, the surface of the packaging bag is hardly damaged.

According to the invention which concerns on Claim 3, a vibration is given to the content in a packaging bag, the air mixed with the content can be moved to the upper part of a packaging bag, and it can deaerate more reliably.
According to the invention which concerns on Claim 4, the residual of the air in a packaging bag can be reduced further by performing deaeration twice.
According to the invention according to claim 5, since pressure is applied to the air in the packaging bag while lowering the deaeration roller, there is no fear that the filled contents are pushed upward and escape from the packaging bag, The air in the packaging bag can be extracted through a slight gap between the deaeration rollers.
According to the invention which concerns on Claim 6, the air which accumulated on the upper part of the packaging bag is strongly pressed with a pressing board, it extrudes from a packaging bag, and the lowering pressing board presses the contents and arranges a shape.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, a degassing / conveying device 1 for a packaging bag according to the present invention is incorporated in a packaging machine that fills and packs powder or granules in a packaging bag, and fills the contents in the packaging bag. It is provided between the filling device 2 and the blocking device 3 that blocks the bag mouth of the packaging bag.
Since the structures of the filling device 2 and the sealing device 3 are not different from the conventional ones, detailed description thereof is omitted.

As shown in FIGS. 1 and 2, the deaeration conveyance device 1 includes a pair of conveyance belts 4 that convey the bag mouth portion of the packaging bag A filled with the contents in the filling device 2 from both sides, and the packaging bag. A conveyor 5 that supports and conveys the bottom of A, and two deaeration units 6 provided on the upstream side and the downstream side of the conveyance path of the packaging bag A by the conveyance belt 4 and the conveyor 5, respectively.
The conveyor belt 4 and the conveyor 5 are intermittently operated, and stop when the packaging bag A reaches the deaeration unit 6.

As shown in FIGS. 2 to 4, the deaeration unit 6 includes a pair of band plates 7 disposed so as to be opposed to each other with the packaging bag A sandwiched below the transport belt 4, and the packaging bag A below the band plate 7. A pair of deaeration rollers 8 disposed so as to face each other, and a vibration device 9 that applies up and down vibrations to the conveyor 5 below the belt plate 7 and the deaeration rollers 8.
The strip 7 is longer than the width of the packaging bag A and is disposed in parallel with the transport direction of the packaging bag A. Further, as shown in FIG. 5, the strips 7 are attached to the inner end portions of the pair of first air cylinders 10 that face each other across the transport path of the packaging bag A and are orthogonal to the transport direction.

The pair of belt plates 7 are configured to advance and retract in the horizontal direction in opposite directions by driving the first air cylinder 10, and when close to each other, the bag mouth portion of the packaging bag A is disposed on both sides. Support from across.
Further, air vents 11 are formed on both sides of the surface of the strip 7 in contact with the packaging bag A, respectively. Therefore, even if the pair of strips 7 are in contact with each other, a cavity penetrating vertically is formed between the strips 7 in the portion where the air vent recess 11 is formed.
Further, a guide plate 12 that is inclined so as to gradually move away from the transport path of the packaging bag A toward the upstream side is attached to the upstream end of the strip 7 in the transport direction, and the bag mouth portion of the packaging bag A is connected to the strip plate. 7 is introduced.

2 and 3, the deaeration roller 8 is supported so as to freely rotate around a central axis that is longer than the width of the packaging bag A and parallel to the conveyance direction of the packaging bag A. Each deaeration roller 8 is attached to the inner ends of the pair of second air cylinders 13 that are opposed to each other across the conveyance path of the packaging bag A and orthogonal to the conveyance direction.
By driving the second air cylinder 13, the pair of deaeration rollers 8 advance and retreat in the opposite directions in the horizontal direction to approach and separate from each other, and there is a slight gap between the deaeration rollers 8 when they are closest. It's getting ready.

The second air cylinders 13 are respectively attached to the lower ends of a pair of third air cylinders 14 that are suspended vertically at positions facing each other across the conveyance path of the packaging bag A. The pair of third air cylinders 14 extend and retract in conjunction with each other, and when the third air cylinder 14 is driven, the pair of second air cylinders 13 and the deaeration roller 8 attached thereto simultaneously move up and down. ing.
A vertical plate 15 is erected above the deaeration roller 8, and a pressing plate 16 is provided below the deaeration roller 8 so as to project obliquely from directly below to the lower outside. The vertical plate 15 and the presser plate 16 move close and away and move up and down in conjunction with the deaeration roller 8. When the pair of vertical plates 15 are closest to each other, a slight gap is formed between them.
The inclination angle of the presser plate 16 can be adjusted.

The vibration device 9 includes a vibration table 17 disposed so as to contact the packaging bag support surface of the conveyor 5 and vibration generators 18 attached to both sides of the vibration table 17.
The central portions on both sides of the lower surface of the vibration table 17 are supported so as to be swingable through a link mechanism 19, and the four corners of the lower surface of the vibration table 17 are supported by vibration-proof rubber 20.
The vibration generator 18 is a conventionally known one, and as shown in FIG. 6, the eccentric weights 21 and 21 ′ are respectively fixed, and the two excitation shafts 22 and 22 ′ that rotate independently, From two motors 23 and 23 'that are coupled to the excitation shafts 22 and 22', respectively, and reversely rotate the excitation shafts 22 and 22 ', and a single casing 24 that houses the excitation shafts 22 and 22'. The casing 24 is attached to the vibration table 17.

The eccentric weights 21 and 21 ′ attached to the two excitation shafts 22 and 22 ′ reach the top and bottom at the same time while rotating in reverse and move to the left and right sides, thereby causing vibration in the vertical direction. It is supposed to occur.
Further, the vibration generators 18 on both sides generate the same amount of vibration in the same direction, vibrate the vibration table 17, and give vertical vibrations to the packaging bag support surface of the conveyor 5 in contact with the vibration table 17.

As shown in FIG. 4, the pair of conveying belts 4 are guided by a plurality of guide rollers 25, arranged side by side in a horizontal direction so that adjacent surfaces come into contact with each other, and are rotated in reverse to each other. And the conveyance belt 4 clamps the bag opening part of the packaging bag A with the surface which contacted, and conveys the packaging bag A with which the content part was filled.
Moreover, the track | orbit of the surface which contact | connects the packaging bag A of the conveyance belt 4 is mutually spaced apart immediately on the air bleeding recessed part 11 of the strip | belt board 7, and the air vent hole 26 penetrated up and down is formed in this part.

The deaeration conveyance device 1 of the present invention performs deaeration as follows.
The packaging bag A filled with contents in the filling device 2 is supported at the bottom by the conveyor 5 and sandwiched by the conveyor belt 4 at the bottom of the bag, and the upstream deaeration unit by the conveyor 5 and the conveyor belt 4. It is conveyed to 6.
At this time, as shown in FIG. 7, in the deaeration unit 6, the first air cylinder 10 is moved backward to separate the strip 7, and the second air cylinder 13 is moved backward to separate the deaeration roller 8. At the same time, the third air cylinder 14 is retracted to raise the deaeration roller 8. Further, the vertical plate 15 and the presser plate 16 interlocked with the deaeration roller 8 are both separated from each other and are in the raised position.

When the packaging bag A reaches the deaeration unit 6, the conveyor belt 4 and the conveyor 5 are stopped.
Next, the first air cylinder 10 moves forward and the band plate 7 approaches to hold the bag mouth of the packaging bag A from both sides. At the same time, the second air cylinder 13 moves forward so that the deaeration roller 8, the vertical plate 15, and the presser plate 16 approach each other.
Even if it is closest, a slight gap is formed between the deaeration roller 8, the vertical plate 15, and the presser plate 16 facing each other, and the bag mouth of the packaging bag A passes through this gap.

Next, while operating the vibration device 9, as shown in FIG. 8, the third air cylinder 14 is extended to lower the deaeration roller 8, the vertical plate 15, and the presser plate 16.
When the packaging bag A is vibrated up and down by the vibration device 9, the filled contents are clogged downward, and the air mixed with the contents accumulates in the upper part of the packaging bag A.
Further, the presser plate 16 presses the air accumulated in the upper part of the packaging bag A while descending, and the air in the packaging bag A is pushed from both sides when passing through the gap between the deaeration roller 8 and the vertical plate 15. Try to escape upwards.

Above the deaeration roller 8 and the vertical plate 15, a vertically penetrating cavity is formed between the belt plates 7 that hold the bag mouth portion of the packaging bag A, and an air vent hole 26 is formed between the conveying belts 4. Therefore, the pressurized air is discharged from the upper end opening of the packaging bag A through the cavity and the air vent hole 26.
When the deaeration roller 8, the vertical plate 15, and the presser plate 16 are lowered to the lowest position and the presser plate 16 presses down the contents, the vibration device 9 is stopped and the first air cylinder 13 and the second air cylinder 14 are stopped. Retreats, and the belt plate 7, the deaeration roller 8, the vertical plate 15 and the presser plate 16 are separated from each other.

Further, the third air cylinder is retracted, the deaeration roller 8, the vertical plate 15 and the press plate 16 are raised again, and the conveyance belt 4 moves to resume conveyance of the packaging bag A.
When the packaging bag A reaches the deaeration unit 6 on the downstream side, the transport belt 4 stops, and the packaging bag A is degassed in the same manner as the upstream deaeration unit 6. At this time, in the upstream deaeration unit 6, the subsequent packaging bag A is deaerated.
The packaging bag A that has been degassed twice is transferred toward the sealing device 3 downstream.
Depending on the type of contents, three or more deaeration parts 6 can be provided along the transport path of the packaging bag A, or only one.

The side view of the packaging machine which concerns on the Example of this invention. The side view of a deaeration part. The front view of a deaeration part. The top view of a deaeration part. The top view of a strip. Schematic of a vibration generator. The principal part front view of the deaeration part in the state which the strip and the deaeration roller separated. The principal part front view of the deaeration part in the state which the strip and the deaeration roller approached and descended.

Explanation of symbols

DESCRIPTION OF SYMBOLS A Packaging bag 1 Deaeration conveyance apparatus 2 Filling apparatus 3 Sealing apparatus 4 Conveyor belt 5 Conveyor 6 Deaeration part 7 Band plate 8 Deaeration roller 9 Vibration apparatus 10 1st air cylinder 11 Air extraction recessed part 12 Guide plate 13 2nd air cylinder 14 Third Air Cylinder 15 Vertical Plate 16 Presser Plate 17 Vibration Table 18 Vibration Generator 19 Link Mechanism 20 Anti-Vibration Rubber 21, 21 ′ Eccentric Weight 22, 22 ′ Excitation Shaft 23, 23 ′ Motor 24 Casing 25 Guide Roller 26 Air Hole

Claims (6)

  A pair of conveyor belts that convey the bag mouth portion of the packaging bag filled with contents from both sides, a conveyor that supports and conveys the bottom of the packaging bag, and can be brought into and out of contact with each other below the conveyor belt. A pair of belt plates installed and supported by sandwiching the bag mouth portion of the packaging bag from both sides, and installed below the belt plate so as to be close to and away from each other and movable up and down. A pair of deaeration rollers that move up and down in close proximity to the bag mouth portion of the packaging bag when the bag mouth portion of the bag is supported, and form an air vent recess on the surface of the strip that contacts the packaging bag The packaging bag is deaerated and transported above and below the belt plate by separating the tracks on the surface of the transport belt in contact with the packaging bag from each other and forming an air vent hole penetrating vertically. apparatus.   The band plate and the deaeration roller are installed during the conveyance of the packaging bag by the conveyance belt and the conveyor, and the conveyance belt and the conveyor stop when the packaging bag reaches above the band plate and the deaeration roller. The deaeration conveyance apparatus of the packaging bag described in Claim 1.   The deaeration conveyance apparatus of the packaging bag described in Claim 2 which provided the vibration apparatus which gives an up-and-down vibration to the said conveyor under the said strip and deaeration roller.   The deaeration conveyance apparatus of the packaging bag described in Claim 3 which provided the deaeration part which consists of the said strip | belt board, a deaeration roller, and a vibration apparatus along the conveyance path | route of the said packaging bag.   The said deaeration roller is a deaeration apparatus of the packaging bag described in any one of Claims 1-4 which descend | falls in the state which had the clearance gap slightly when mutually approaching.   6. The deaeration conveyance apparatus for a packaging bag according to claim 5, wherein a presser plate extending outwardly from directly under the deaeration roller is installed so as to move close to, away from, and move up and down in conjunction with the deaeration roller.

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