JP2010013184A5 - - Google Patents

Description

Packaging bag mouth sealing method and packaging device

The present invention is primarily the wrapper containing the foodstuff, to remove the water solution adhering to the bag mouth inner surface, a method and apparatus for sealing the later bag opening accordingly, more specifically, their respective multiple sets of support packaged with carrying supports the wrapper, such as when filling the object to be packaged in the wrapper in their delivery track, a water solution adhering to the bag mouth, to pre-heated evaporation prior to sealing the bag mouth by The present invention relates to a bag mouth sealing method and a packaging apparatus therefor .

In Japanese Patent Application Laid-Open No. 59-12522 of Patent Document 1 below, a first set provided on this transport track is supported by each of a large number of sets of clampers, and each packer is transported by movement of each clamper. Discloses a packaging apparatus that fills the wrapping bag with solid matter such as meat or vegetables. In such a packaging device, it is highly likely that the water solution attached to the surface of the filling device will be transferred to the inner surface of the bag mouth, and as a pre-process for sealing the bag mouth, the bag mouth with the water solution attached to the inside is a pair of heat bars. Discloses a technique in which a liquid is thermally expanded between both heat bars and ejected from the inside of the bag mouth.

Further, in Japanese Patent Laid-Open No. 2001-301717 of Patent Document 2 , the bag mouth is clamped and line-sealed by a pair of narrow first seal bars to eliminate the containment of water, and the upper and lower widths are further increased. A means for sealing the bag mouth by pinching with a second seal bar having a gap is disclosed.

JP 59-12522 A JP 2001-301717 A

However, in Patent Document 1, it is difficult to evaporate the moisture trapped by the heat pressure of the bag mouth from both sides with heat bars from the bag mouth in a short time with the heat of the heat bar, and the bag mouth is sealed in the subsequent process. In this case, there is a problem that unvaporized water remains in the form of white mist between the bag mouths, and in the case of a colorless and transparent wrapping bag, the white stain pattern of the steam remaining in the seal portion reduces the commercial value.

Moreover, in the said patent document 2, when performing a line seal by a 1st seal bar, the groove | channel of a V-shaped cross section is formed in the bag mouth along the both sides of a line seal, and these grooves function as a pot which stores water. Therefore, after all, there is a drawback that the water stored in the groove is sealed in the bag mouth by the seal by the seal bar.

In order to solve the above-mentioned problem, the present invention transports a wrapping bag suspended by a support tool along a transport track integrally with the support tool, and wraps it in the wrapping bag at a filling station of the transport track. after filling an object, in sheet Lumpur station, in the sealing process of the bag mouth of the packaging bag to form a seal package bag mouth heat sealed to a pair of seal bars, and the said filling station, sealing station and the The bag mouth is narrowed by restricting the proximity of the pair of heat bars arranged at the heating station, and a narrow air gap is formed in the bag mouth to allow narrow air flow. Evaporate the attached water.

Further, in order to solve the above-mentioned problem, the present invention arranges a filling station and a sealing station along a transport path of a packaging bag supported by a support, and a packaged article is sent to the packaging bag sent to the filling station. In the packaging apparatus configured to heat-weld the bag mouth of the wrapping bag with a seal bar in the sealing station, a heating station is disposed between the filling station and the sealing station, and a pair of the heating station A heat bar is installed, and the pair of heat bars restricts access to more than the necessary amount so that the bag mouth of the sachet is narrowed and a stenosis gap that allows ventilation is left between the bag mouths. Includes a heater that heats and evaporates the water liquid adhering to the inner surface of the bag mouth.

Water droplet removal by heating a pair of heat bars at the heating station is performed by constricting the bag mouth with the heat bars. Gas flow is free without resistance in the narrow gap formed in the bag mouth in this way, and even if water liquid adheres to the wall surface of this narrow gap, the liquid can evaporate without resistance with the heat of the heat bars on both sides. Can do.

In addition, since the weight of the packed object is acting on the wrapping bag, when the wrapping bag is intermittently transferred, the wrapping bag shakes due to the inertia corresponding to the weight of the food, and the wrapping bag is also caused by the transport centrifugal force. As a result, the volume changes in the head pace inside the sachet, and a breathing phenomenon occurs through the stenosis gap. That this breathing behavior means the occurrence of air flow in the constriction gap, receives heat heat bar at the wall of the constriction gap to promote vaporization of the water solution, facilitate evaporation of water solution.

In the present invention, the bag mouth is constricted with the heat bar and heated, and the water liquid previously attached to the bag mouth is removed from the narrowing gap, so that the water liquid is sealed in the seal portion of the bag mouth by the seal bar. And the transparency of the seal mark at the bag mouth is improved.

Explanatory drawing of the heat bar in the heating station Partial view of the lower part of the previous figure Development view of the packing bag trajectory Cross section of the device that operates the heat bar Top perspective view of packaging equipment Explanatory drawing of the device that operates the suction nozzle Partial enlarged explanatory drawing of the previous figure Top view of the bag mouth Front view of suction nozzle Illustration of horizontal nozzle Block diagram explaining the sealing device Explanatory drawing of means for forming narrowing gap in heat bar

The embodiment shown in FIG. 5 shows a packaging device for carrying out the method invention. Disc 11 places the 8 pairs of support 10 in its periphery at equal intervals, each set of the support 10 is formed by a pair of arms 12 provided on the tip of the clamp 13, respectively. Shaft 14 is intermittently rotating the disc 11 in the direction of arrow 15, the support 10 is intermittently moved with pauses at each station ▲ 1 ▼ ~ ▲ 8 ▼ indicated by circled letters. When one of the packaging bags 20 loaded on the bag feeding station (1) is delivered to the support device 10, the support device 10 sandwiches the bag mouth of the packaging bag 20 and the lower side edges, and It is the structure which conveys along a circular conveyance track | orbit in the suspended state.

FIG. 2 shows a state in which a part of the disk 11 is viewed obliquely from below, and the two arms 12 are supported by the disk 11 via pins 16 respectively. As a result of engaging both arms 12 via a pair of sector gears 17, the arms 12 are interlocked about the pin 16 as an axis. A bracket 18 fixed to the lower surface of the disk 11 pivotally supports a lever 19 with a pin 21 so as to be swingable. The lever 19 is connected to an end of one arm 12 via a connecting rod 22. Therefore, the force of the pulling spring 23 that attracts both the arms 12 presses the pulley 24 provided on the lever 19 against the upper surface of the annular cam 25. Accordingly, when the disk 11 rotates in the direction of the arrow 15, the pulley 24 rolls on the upper flat surface 26 of the annular cam 25, so that the distance between the pair of clamps 13 is maintained constant.

Upper flat surface 26 of the annular cam 25 is partially lowered, there is a height difference, when the lower flat surface pulley 24 passes, attracting force of the tension spring 23 reduce the width of each clamper 13, in FIG. 5 At stations {circle around (3)} to {circle around (4)}, the bag mouth of the wrapping bag 20 is pushed wide by the approach of both clamps. That is, these regions (3) to (4) are sections in which the package 20 is filled with an edible seasoning liquid and solid food. In short, as shown in FIG. 3, in the station (3), the seasoning liquid 28 is filled into the bag 20 through the tube 27, and in the station (4), the food 30 is filled into the bag 20 through the hopper 29. Eventually, the operations in these processes are factors that cause the liquid to adhere to the inner surface of the bag mouth.

Further, in order to form a vacuum package, a spatula nozzle 35 is disposed at the station (5), and the bag mouth 36 into which the spatula nozzle 35 is inserted is tensioned by separating the pair of clamps 13, and heated steam is emitted from the spatula nozzle 35. There is a case where it is injected into the sachet 20. Although it is generally known that a vacuum acts in the sachet by cooling and condensing the heated steam in the sealed sachet 20, this process is also a cause of water liquid adhesion to the bag mouth inner surface. It has become.

To remove water liquid adhering to the bag mouth, and place the pair of heat bars 31 to the heating station ▲ 6 ▼ in FIG. 5, FIG. 4 is a device for operating a heat bar 31 of the. In this apparatus, a casing 41 is installed on the upper part of a machine base via legs 40, and a sleeve 42 attached in the casing 41 supports a pair of rods 43 each having a heat bar 31 at the tip in parallel. These rods 43 are connected to both ends of the bell crank 45 via links 44, respectively, and one end of the bell crank 45 is operated by the power of the fluid cylinder 46 via the piston rod 47. That is, the pair of heat bars 31 approach and separate from each other by forward and reverse rotation of the bell crank 45 around the pivot shaft 48, but the bolt 49 provided on the casing 41 serves as a variable stopper, and the momentum of the bell crank 45 in the clockwise direction. And functions as an element 50 that prevents the heat bars 31 from approaching more than necessary.

The element 50 shown in FIG. 4 is removed and the fluid cylinder 46 has a servo function. The servo control of the fluid cylinder 46 restricts the rotational momentum of the bell crank 45 and restricts the relative approach amount of the pair of heat bars 31. It is possible. Aruiwama was, the element 50 removed, the tip of the screw 57 provided in the heat bar 31 of one side of a part in FIG. 12, to face the surface of the heat bar 31 of the other side, limiting the access of both heat bar 31 Then, a narrow gap 56 as set can be formed at the bag mouth of the wrapping bag 20, and the position of the screw 57 can be fixed by tightening a pair of double nuts 58.

When the packaging bag 20 suspended by the support 10 reaches the arrangement position of the pair of heat bars 31 shown in FIG. 1, the heat bar 31 approaches from both sides to narrow the bag mouth 36 . Desirably, the constriction gap 56 of 0.1 mm to 2.0 mm is formed in the bag mouth 36 by the proximity of the heat bars 31, and the heat bar 31 heated to a surface temperature of 100 ° C. to 200 ° C. by the heater 51 has the bag mouth 36 from both sides. Heat. In this case, the closer the pair of heat bars 31 are, the greater the facing radiant heat acts to enhance the evaporation effect of the water. Therefore, it is desirable that the value of the constriction gap 56 is selected within a range where a high evaporation effect is exhibited.

Each time the wrapping bag 20 suspended and supported by the support 10 is intermittently stopped at each station, the inertia of the stored food 30 acts on the wrapping bag 20 to shake the suspended wrapping bag 20. Thus, the volume of the internal head space 52 is changed to form an air flow in the constriction gap 56 . This air flow enhances the evaporation effect of the water liquid adhering to the inner surface of the bag mouth. In this case, the air flow in the constriction gap 56 becomes more positive by moving the pair of urethane movable members 53 arranged in the lower regions of the heat bars 31 closer to or away from each other and assisting the volume change of the head space 52. It can also be more efficient drying of the water solution.

Wrapper 20 from the heating station ▲ 6 ▼ in FIG 5, is carried between a pair of seal bars 54 in the sealing station ▲ 7 ▼ the rear region, these sealing bars 54, bag mouth have been removed water solution 36 Weld with pressure. Since the water liquid in the bag mouth 36 is removed in advance, the water liquid is not sealed in the sealed portion of the bag mouth 36 by the seal bar 54, and the transparency of the seal mark at the bag mouth 36 is improved. Further, the pair of cooling bars 55 disposed in the cooling station {circle around (8)} in the rear region function to take heat from the bag mouth 36 and harden the seal portion.

As shown in FIG. 8, the liquid 61 tends to concentrate in the folding grooves 60 on both inner sides of the bag mouth 20, and the evaporation rate is poor even when heated by the heat bar 31 from the outside. There is a high possibility of containing the liquid 61 . Therefore, a horizontal guide 64 is installed between the pair of brackets 63 as shown in FIG. 6 at the station (5) in FIG. 5, and the pair of upright columns 65 are supported on the guide 64. A pivot shaft 67 of the lever 66 is supported on each of the upper ends of the upright columns 65 , and a spatula suction nozzle 68 is supported on each pivot shaft 67. Various widths of the wrapping bag 20 are used depending on the objects to be packed, but the bag width to be used is limited due to the configuration of the apparatus. Based on such conditions, the distance between the standing column members 65 can be changed along the guide 64. The piston rod 70 in the cylinder 69 is connected to a pair of levers 66 via a bifurcated link 71, and the end of the suction nozzle 68 can be rotated along an arrow 72 by the power of the cylinder 69. When the wrapping bag 20 supported by the supports 10 at both ends reaches the illustrated station, the pair of suction nozzles 68 are rotated so as to be inserted into the bag mouth 36 .

As shown in FIG. 9, the suction nozzle 68 has a vertically long and narrow gap 73 on the outer surface, and is connected to the vacuum pump 76 via the on-off valve 74 and the drain reservoir 75 as shown in FIG. A vacuum suction force acts on the gap 73. In some cases, a compressor may be installed in place of the vacuum pump 76 and the drain reservoir 75, and air may be ejected from the gap 73. In this way, the aqueous liquid 61 accumulated in the folding grooves 60 on both inner sides of the bag mouth 20 in FIG. 8 can be removed by the suction nozzle 68, and then the heating station {circle around (6)} in the rear area of FIG. It is possible to improve the water-liquid elimination at the heat bar 31 in ▼.

In some cases, the heating station {circle around (6)} in which the heat bar 31 is installed is provided with a thin nozzle 80 that is longer than the lateral width of the bag mouth 36 of the packaging bag 20 shown in FIG. . The wrapping bag 20 supported and transported by the support tool 10 stops at the station, and at the same time as the heat bar 31 narrows the bag mouth 36 , the elastic packing 81 is pressed against the valley surface 90 between the two heat bars 31. The nozzle 80 is lowered as described above, and the suction force by the vacuum pump 82 or the compressed air pressure from the compressor 83 is applied to the narrow gap 56 of the bag mouth 36 through the nozzle 80 that keeps airtightness. The aqueous solution can be removed by a synergistic effect, and the drying efficiency can be improved.

In FIG. 5, the stop time of the wrapping bag 20 at each station is set based on the filling time of the package into the wrapping bag 20 or the sealing time of the bag mouth 36 by the seal bar 54 . About 5 seconds is common. Step S1 in FIG. 11 formed on the basis of the reference time, the heating of the bag mouth 36 by a heat bar 31, step S2 represents the heating of the bag mouth 36 by seal bars 54. If however no Ki out to perform a water solution removed by heating the bag mouth 36 by a heat bar 31 corresponding to step S1, with in a heat bar 31 provided to each of the plurality of heating stations as the steps S3, S4 to exclude water solution Is desirable. In this case, the sealing action by the seal bar 54 in step S5 is further performed at a station in the rear zone. Note added over thermal twice into the bag mouth 36 in step S3, S4, if the bag mouth is over-heated state by further application of heat in step S5, the sealed heating is bypassed in step S5, in step S6 the bag mouth 36 may seal to Rukoto at a clamping pressure effect of the bag mouth 36 by the cooling bar 55.

The support 10 shown in FIG. 5 has a structure in which both side edges of the bag 20 are sandwiched between a pair of clamps 13. However, since it is known that the front and rear surfaces of the sachet 20 are adsorbed and supported by a pair of vacuum suction type bars, the support 10 described in the claims includes such a vacuum suction type. Further, the folding grooves 60 on both sides of the wrapping bag in FIG. 8 are names of portions where the wrapping material is folded. However, the side edge of the wrapping bag 20 formed by laminating and pasting two wrapping materials is not bent, and strictly speaking, there is no folding groove. However, this portion does not change but becomes a reservoir of the aqueous liquid 61 , and in the claim, the side edge of the packaging material is also called a folding groove.

The present invention can be applied to, for example, a packaging device that removes water and liquid attached to the inner surface of a bag mouth of a bag containing food and then seals the bag mouth.

▲ 3 ▼ (circled number) ... Filling station ▲ 6 ▼ (circled number) ... Heating station ▲ 7 ▼ (circled number) ... Sealing station 10 ... Supporting tool 20 ... Packaging bag 31 ... Heat bar
56 ... Narrow gap 52 ... Head space 53 ... Movable material 54 ... Seal bar
50 ... Element 60 ... Folding groove 68 ... Suction nozzle 73 ... Clearance hole 80 ... Nozzle 81 ... Elastic packing

Claims (6)

The hanging was wrapper in support, the transported along a support and conveyor track together, after filled with articles to be packaged in the wrapper in the filling station of the conveyor track, in sheet Lumpur station, a pair In the method of sealing the bag mouth of the sachet in which the bag mouth is heated and sealed with a seal bar to form a sealed package,
The bag mouth is narrowed by restricting the approach of the pair of heat bars arranged at the heating station between the filling station and the sealing station, and a narrow gap through which narrow air can flow is formed in the bag mouth. A method for sealing a bag mouth of a sachet in which the water liquid adhering to the bag mouth is evaporated by the heating energy of the heat bar . The pair of movable members disposed on both sides of the bag mouth in the lower area of the heat bar, wherein the bag mouth is pushed in from both sides to change the volume of the head space in the bag mouth so that an air flow is generated in the bag mouth. How to seal the bag mouth. A filling station and a sealing station are arranged along the transport path of the packaging bag supported by the support, and after filling the packaging bag sent to the filling station with the object to be packaged, the bag mouth of the packaging bag is opened at the sealing station. In the packaging device configured to heat-weld with a seal bar,
A heating station is arranged between the filling station and the sealing station, and a pair of heat bars are installed in the heating station, and the pair of heat bars can narrow the bag mouth of the wrapping bag and allow ventilation between the bag mouths. The packaging apparatus is characterized in that the heat bar is provided with a heater that heats and evaporates the water liquid adhering to the inner surface of the bag mouth, while restricting approaching more than a necessary amount so that a narrow constriction gap remains. . A drainage station is formed between the filling station and the heating station of the transfer track, and a pair of vertically long nozzles are installed in the drainage station, and a pair of vertically long nozzles are arranged in accordance with the arrival of the packing bag to the drainage station. Is inserted and approached toward the folding grooves on both inner sides of the bag mouth, and vacuum suction force or compressed air is applied to the folding grooves from the gap holes formed on the side surfaces of the two nozzles, and collected in the folding grooves. The packaging apparatus according to claim 3, further comprising means for removing the aqueous liquid. In the heating station, in the upper region of the bag mouth constricted by a pair of heat bars, a thin flat nozzle is arranged in the lateral direction protected by elastic packing, and the elastic packing is attached in accordance with the narrowing action of the bag mouth by the heat bar. The packaging apparatus according to claim 3, further comprising means for applying a vacuum suction force or a compressed air force to the narrowing gap of the bag mouth through a thin nozzle and pressed against the upper boundary portion of both heat bars. The pair of heat bars are provided at the tips of a pair of rods supported by sleeves, and these rods are connected to both ends of the bell crank via links, respectively, and the bell crank is rotated forward and backward to bring the pair of heat bars closer to and away from each other. It is equipped with a fluid cylinder to be operated, and the element that prevents the two heat bars from approaching more than necessary, or a servo function to the fluid cylinder so that the bag mouth of the sachet is narrowed and a narrowing gap that can be ventilated remains between the bag mouths The packaging apparatus according to claim 3, further comprising: