JP4406216B2 - Powder filling and sealing method for powder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag filling and sealing method in which, for example, powders such as starch and wheat flour are filled in a packaging bag, and the filling port is heat-sealed at a sealing portion.
[0002]
[Prior art]
Conventionally, granular materials such as starch and wheat flour are pneumatically transported from a storage tank through piping and then packed into a packaging bag before shipment.
[0003]
As such a packaging bag, for example, as shown in FIG. 11, the packaging bag 10 has a substantially rectangular shape as a whole, and has a filling port 11 for inserting a supply nozzle for powder particles at one end edge, A heat sealable sealing part 12 is used so as to cover the filling port 11. In this example, the sealing portion 12 has a flap shape, and a hot melt adhesive is applied to the inner surface thereof. When the hot plate described later is pressed, the sealing portion 12 is adhered to the packaging bag 10 to seal the filling port 11. Stop.
[0004]
On the other hand, in Patent Document 1 below, a pusher plate that is provided on the first conveyor and inclines the posture so that the valve opening of the packaging bag is in the foremost position, and the packaging bag in the inclined posture come into contact with each other. A contact plate that stops the upper conveyance, a second conveyor that is disposed orthogonal to the first conveyor and stops at the contact plate, and that faces the valve opening of the packaging bag on the side of the second conveyor An air blower disposed at a position, a hot plate that melts and seals the adhesive of the valve opening of the packaging bag on the downstream side of the air blow device, and a position where the valve mouth of the packaging bag contacts the hot plate A packaging bag sealing device having a forced pressing device that rotates a packaging bag and presses it against a hot plate and a sealing method thereof are disclosed.
[0005]
According to the method disclosed in Patent Document 1, the posture of the packaging bag carried on the first conveyor is inclined by the pusher plate, and in this state, the center of the edge of the packaging bag hits the contact plate, The packaging bag is dented and deformed due to the inertia of the powder and the density of the powder inside the valve port increases, so that the hot plate effectively contacts when sealing the valve port. Yes.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-180620
[Problems to be solved by the invention]
However, since the supply of powder particles to the packaging bag is generally performed with the packaging bag upright with the filling port of the packaging bag up, when the packaging bag is laid on the conveyor, it is not near the filling port. In many cases, the granules are not filled to every corner of the bag, and a space is formed. For this reason, when a hot plate is pressed against the sealing part that covers the filling port, the inside of the vicinity of the filling port is a space, the pressing force does not act sufficiently, and the filling port cannot be sealed sufficiently. there were.
[0008]
Further, in the method described in Patent Document 1, the posture of the packaging bag moving on the first conveyor is inclined by the pusher plate, and the center of the edge of the packaging bag is made to collide with the contact plate, The powder particles inside the valve port are pressed and hardened. However, if the inside of the vicinity of the filling port is a space as described above, the space is crushed even if it collides with the contact plate. As a result, the powder particles cannot be effectively moved to the vicinity of the filling port, and there is a possibility that the sealing part is not sufficiently adhered by the hot plate.
[0009]
Therefore, the object of the present invention is to move the powder particles to the vicinity of the filling port of the packaging bag, and when the hot plate is pressed against the sealing portion arranged so as to cover the filling port, the sealing portion is good An object of the present invention is to provide a bag filling and sealing method for a granular material that is sealed to prevent leakage of the granular material.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses a packaging bag having a filling port into which a powder supply nozzle can be inserted and a heat-sealable sealing portion arranged to cover the filling port. In the method of filling and sealing powder, a supply step of powder is inserted into the filling port, a filling step of filling powder into the packaging bag, and a packaging bag filled with powder into the conveyor In the middle of transporting, the packaging bag is struck by hitting the packaging bag to move the powder body in the direction of the filling port, and the sealing part arranged so as to cover the filling port is pressed by a hot plate to seal parts adhered to the packaging bag look including a sealing step of sealing the filling port, the beat smb. up by ganging up on process, a packaging bag filled with granular material, the filling port is placed on a conveyor to face the traveling direction Rotate with one end supported by one side of the conveyor path of this conveyor The arm is swung down substantially perpendicular to the conveyor, so as to be substantially perpendicular to the moving direction of the packaging bag, and performs by applying to the packaging bag.
[0011]
According to the method of the present invention, in the bag hitting process, the powder bag is moved in the direction of the filling port by hitting the packaging bag. Since the portion is effectively closely attached to the packaging bag body and the filling port can be sealed without a gap, it is possible to prevent leakage of the granular material.
Further, the bag hitting step carries the packaging bag filled with the granular material on the conveyor so that the filling port faces in the advancing direction, and one end is supported on one side of the conveying path of the conveyor. The arm which moves and swings down substantially perpendicularly to the conveyor is applied to the packaging bag so as to be substantially perpendicular to the moving direction of the packaging bag. Therefore, when the arm is swung down and the bag is struck, the movement of the packaging bag stops for a moment, and the internal granular material tends to move forward by the inertial force. Also, since the arm dents the bag, the powder of that part is pushed away and moves to both sides of the arm. As a result, the granular material in the packaging bag can be moved to the vicinity of the filling port more effectively.
[0012]
In the present invention, the bag hitting step extends from the edge where the filling port is located to a quarter of the length of the packaging bag and from the edge to a half of the length of the packaging bag. This is preferably done by hitting the area. According to this aspect, when hitting the packaging bag and pushing away the powder of that portion to the surroundings, the powder can be moved more effectively in the vicinity of the filling port of the packaging bag.
[0014]
Furthermore, it is preferable that the arm used in the bag hitting step has a cylindrical roller attached to the outer periphery thereof. According to this aspect, the cylindrical roller on the outer periphery of the arm rotates even when the arm is swung down and applied to the packaging bag while the packaging bag is moving on the conveyor. A strong frictional force is not applied to the arm that does not move, and the packaging bag can be prevented from being damaged.
[0015]
Furthermore, it is preferable to perform a step of putting the packaging bag filled with the granular material on a vibrator and a pressing roller between the bag hitting step and the sealing step. According to this, after the granular material in the packaging bag is moved in the direction of the filling port by the bag hitting process, it is further applied to the vibrator and the pressing roller to fill the moved granular material to every corner in the packaging bag. Therefore, when the sealing portion is pressed by the hot plate, the sealing portion can be more effectively adhered to the packaging bag body.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, with reference to the drawings, an embodiment of a filling and sealing method of a granular material according to the present invention will be described. FIG. 1 is an explanatory view showing the action of the bag hitting process, FIG. 2 is an explanatory view showing the entire bag filling and sealing process, FIG. 3 is a perspective view showing a schematic structure of the filling device, and FIG. 4 is a schematic structure of the bag hitting apparatus. FIG. 5 is a perspective view showing a schematic structure of a vibrator, FIG. 6 is a perspective view showing a schematic structure of a checker and a sorter, FIG. 7 is a perspective view showing a schematic structure of a molding machine, and FIG. FIG. 9 is an explanatory view showing the operation of the sealing machine, and FIG. 10 is a perspective view showing the pressure bias roller.
[0017]
As shown in FIG. 2, a production line for carrying out the method for filling and sealing a granular material according to the present invention includes a filling device 20 called a packer, a bag tapping device 30, and a vibrator on a conveying line 100 such as a conveyor. 40, a checker 50, a sorter 60, a molding machine 70, a sealing machine 80, a pressure bias roller 90, and a palletizer 95 for stacking packaging bags filled with powder particles. .
[0018]
As shown in FIG. 3, the filling device 20 includes a powder supply nozzle 21 that is inserted into the filling port 11 (see FIG. 11) of the packaging bag 10, and a receiving portion 22 that supports the packaging bag 10 in an upright state. have. The powder supply nozzle 21 can be inserted into the filling port 11 of the packaging bag 10, and the powder can be ejected from the nozzle 21 together with the air flow to fill the packaging bag 10.
[0019]
As shown in FIG. 1A, the packaging bag 10 filled with the powder particles thus has a space S in which the powder particles P are not clogged. The packaging bag 10 is carried on the conveyor 101 with the filling port 11 facing forward in the traveling direction.
[0020]
In the present invention, as the packaging bag 10, various bags such as a paper bag, a laminate bag, and a PV bag can be used, and a paper bag made of laminated kraft paper is particularly preferably used. In addition, the powder P is not particularly limited as long as it is a powder that can be transferred by an air flow, but powders of food materials such as starch and wheat flour are particularly preferably employed.
[0021]
As shown in FIG. 4, the bag hitting device 30 includes a rotation actuator 31, an arm 32 that rotates by the rotation actuator 31, and a cylindrical roller 33 that is attached to the outer periphery of the arm 32. The arm 32 rotates as indicated by an arrow in the figure and is swung down substantially perpendicularly to the conveyor 101 (preferably within a range of ± 20 ° with respect to the vertical direction). The angle of the arm 32 is substantially perpendicular to the conveying direction of the conveyor 101 (preferably in a range of ± 20 ° with respect to the perpendicular direction). As the rotary actuator 31, for example, an automatic valve drive unit or the like can be used. As the cylindrical roller 33, for example, a roller of a free roller conveyor can be used.
[0022]
As shown in FIG. 1 (C), the hitting point by the arm 32 is set at a distance L from the leading end of the packaging bag 10 in the moving direction. This distance L is from 1/2 of the length of the packaging bag 10. Is shorter and is preferably set longer than ¼. The timing at which the arm 32 is swung down is adjusted by arranging a sensor (not shown) on the conveyor 101, detecting that the tip of the packaging bag 10 has passed, and setting a time corresponding to the moving speed of the conveyor 101. can do.
[0023]
The speed at which the arm 32 is swung down is preferably such that the peripheral speed of the arm 32 is about 4 to 5 m / second, and the mass of the arm 32 including the cylindrical roller 33 is 3 to 4 kg. preferable.
[0024]
The cylindrical roller 33 attached to the arm 32 imparts an appropriate mass to the arm 32 to increase the impact force on the packaging bag 10 and also when the cylindrical roller 33 comes into contact with the moving packaging bag 10 on the conveyor 101. Since 33 rotates and reduces frictional force, it serves to prevent the packaging bag 10 from being damaged.
[0025]
When the packaging bag 10 is hit with the arm 32 in this manner, the powder body P inside is pushed away and moves forward and backward of the arm 32. In this case, there is a space S ahead of the packaging bag 10 in the traveling direction, and when the arm 32 is struck, a momentary stopping force acts on the packaging bag 10 and the inertial force of the powder P acts. Therefore, the granular material P moves effectively so as to fill the space S.
[0026]
As shown in FIG. 5, the vibrator 40 includes a conveyor 102 having guides 42 and 43 on both sides, and a vibrator 41 disposed therein. When the packaging bag 10 that has passed through the bag hitting process is placed on the conveyor 102, the internal vibrator 41 is activated to apply vibration to the packaging bag 10, and the powder P moves to every corner of the packaging bag 10. To do.
[0027]
As shown in FIG. 6, the checker 50 has a mass meter installed therein, and the mass of the packaging bag 10 placed thereon is measured. Then, when the measured mass deviates from a predetermined range set in advance, it is determined that the granular material is poorly filled, and the subsequent sorter 60 removes the defective product. The sorter 60 includes a conveyor 103, pushers 61 disposed on the sides of the conveyor 103, and a chute 62 that collects the packaging bags extruded by the pushers 61.
[0028]
Accordingly, the mass of the packaging bag 10 filled with the powder P is measured by the checker 50, and when the mass does not fall within a predetermined range, the pusher 61 is activated in the sorter 60, and the defective product is removed. The defective product is collected by pushing in the direction of the chute 62.
[0029]
As shown in FIG. 7, the molding machine 70 has an introduction portion 71 for introducing the packaging bag 10, and a pressing roller (not shown) is disposed therein. And as shown in FIG.1 (D), the packaging bag 10 introduce | transduced into the molding machine 71 is pressed by the press roller 72, and the granular material P moves to every corner in the packaging bag 10, and FIG. It will be in the state with which the granular material P shown to 1 (E) was filled in the packaging bag 10. FIG.
[0030]
As shown in FIG. 8, the sealing machine 80 includes a guide bar 82 attached to a frame 81, a slider 83 that slides along the guide bar 82, and an air cylinder 84 that moves the slider 83. ing. An arm 85 that is rotated by a drive mechanism (not shown) is attached to the slider 83, and a hot plate 86 is attached to the tip of the arm 85.
[0031]
As the arm 85 rotates, the hot plate 86 rises as shown by an arrow B in FIGS. 8 and 9 and abuts against the sealing portion 12 of the packaging bag 11 as shown by an arrow C. To move. Further, when the slider 83 is moved as shown by an arrow A in the drawing by the action of the air cylinder 84, the hot plate 86 is moved in the free end direction of the flap-shaped sealing portion 12, and the sealing portion 12 is wrapped. It presses against the main body of the bag 10.
[0032]
By pressing the hot plate 86 in this way, the hot melt adhesive applied to the inner surface of the sealing portion 12 is welded and adhered to the main body of the packaging bag 10, and the filling port 11 is sealed without a gap. In this case, the bag hitting device 30, vibrator 40, and molding machine 70 move the powder particles in the packaging bag 10 to every corner of the bag, and the powder particles are also filled in the vicinity of the filling port 11. The pressing force of the plate 86 on the sealing portion 12 acts effectively, and the sealing portion 12 can be strongly pressed against the main body of the packaging bag 10 and firmly adhered.
[0033]
As shown in FIG. 10, the pressure biasing rollers 90 are rotatably installed on support columns 91 installed on both sides of the conveyor 101 via a support shaft 92. The pressure bias roller 90 includes a pair of discs 93 supported by the support shaft 92 and a plurality of cylindrical rollers 94 having both ends pivotally attached to the periphery of the discs 93.
[0034]
Then, the packaging bag 10 with the sealing portion 12 sealed is moved on the conveyor 101, and is passed between the pressure bias roller 90 and the conveyor 101, whereby the packaging bag 10 is pressed and the hot plate 86 is moved. By pressing, the granular material P moves to the recessed portion, and the packaging bag 10 is reshaped so as to have a constant thickness.
[0035]
The packaging bag 10 that has been filled and sealed in this manner is stacked on the palletizer 95 and temporarily stored, and then delivered on a truck or the like (not shown).
[0036]
【Example】
By the process shown in FIGS. 1-10, the packaging bag 10 which consists of laminated kraft paper was filled and sealed with starch, and the incidence rate of powder leakage was measured. For comparison, in the above process, the occurrence rate of powder leakage when the bag tapping process was not performed was also measured.
[0037]
As a result, when the bag hitting process was not performed, powder leakage occurred in 22 of 100 bags, and the defect rate was 22%.
[0038]
On the other hand, when filled and sealed by the method of the present invention in which the bag hitting process is performed, only two of the 110 bags leaked powder, and the defect rate can be reduced to 1.8%. It was.
[0039]
【The invention's effect】
As described above, according to the present invention, after filling the granular material through the filling port of the packaging bag, the packaging bag is struck in the middle of transporting the packaging bag by the conveyor, and the granular material is directed toward the filling port. By moving, when the sealing part is pressed by the hot plate, the sealing part effectively adheres to the packaging bag body, and the filling port can be sealed without any gaps. The generation of defective products due to leakage can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an operation of a bag tapping step in a bag filling and sealing method for granular materials according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing the whole bag filling and sealing process in the same embodiment;
FIG. 3 is a perspective view showing a schematic structure of a filling device.
FIG. 4 is a perspective view showing a schematic structure of a bag tapping device.
FIG. 5 is a perspective view showing a schematic structure of a vibrator.
FIG. 6 is a perspective view showing a schematic structure of a checker and a sorter.
FIG. 7 is a perspective view showing a schematic structure of a molding machine.
FIG. 8 is a perspective view showing a main part of the sealing machine.
FIG. 9 is an explanatory diagram showing the operation of the sealing machine.
FIG. 10 is a perspective view showing a pressure bias roller.
FIG. 11 is a perspective view showing an example of a packaging bag.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Packaging bag 11 Filling port 12 Sealing part 20 Filling device 21 Powder supply nozzle 30 Bag hitting device 31 Rotating actuator 32 Arm 33 Cylindrical roller 40 Vibrator 50 Checker 60 Sorter 70 Molding machine 80 Sealing machine 86 Hot plate 90 Pressure deviation Roller 100 Conveyance line 101 Conveyor P Granule S Space

Claims (4)

In a method of filling and sealing a granular material using a packaging bag having a filling port into which a powder supply nozzle can be inserted and a heat-sealable sealing portion arranged so as to cover the filling port,
Insert the powder supply nozzle into the filling port, tap the packaging bag in the middle of transporting the packing bag filled with the powder and the packing process filling the packaging bag with the conveyor A bag tapping step for moving the powder particles in the direction of the filling port, and a sealing portion disposed so as to cover the filling port is pressed by a hot plate to adhere the sealing portion to the packaging bag and look including a sealing step of sealing,
In the bag hitting step, the packaging bag filled with the granular material is carried on a conveyor so that the filling port faces in the traveling direction, and one end is supported on one side of the conveying path of the conveyor and is rotated. The powder bag filling , wherein the arm swung down substantially perpendicularly to the conveyor is applied to the packaging bag so as to be substantially perpendicular to the moving direction of the packaging bag. Sealing method. The arm, the bag filling sealing method of claim 1 wherein the particulate material in which a cylindrical roller is attached to the outer periphery. In the bag hitting step, a region from the edge where the filling port is located to a quarter of the length of the packaging bag to the half of the length of the packaging bag is hit from the edge. The bag filling method of the granular material of Claim 1 or 2 performed by. The bag filling method according to any one of claims 1 to 3, wherein a step of applying a packaging bag filled with a granular material to a vibrator and a pressing roller is performed between the bag hitting step and the sealing step.

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