JP2010030601A - Evacuation device of bag-filled package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for stopping steam ejection when an empty bag reaches in a device for evacuating a packaging bag through condensation of heated steam ejected in the packaging bag filled with object to be packaged. <P>SOLUTION: A suction cylinder 50 connected to a suction apparatus 52 is installed in a vicinity of the stopping position of the packaging bag 20, and a means for moving a nozzle 30 is provided between the stopping position of the packaging bag 20 and the suction cylinder 50. When a sensor 26 installed on a conveying track of the packaging bag 20 detects the empty bag, as the signal 54 transmitted from a controller 53 rotates a shaft 35 via a lever 41 by a first motor 40, the nozzle 30 is swung toward the suction cylinder 50 along an arrow mark 56 by the rotation of the shaft 35, and at the same time, heated steam to be fed to the nozzle 30 from a steam generator 37 is disposed and ejected toward the suction cylinder 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a rotary bag filling and packaging apparatus that blows heated steam into a packaged package to be transported and evacuates the inside of the bag by volume change due to condensation of the heated steam.

  In Patent Document 1 below, a plurality of sets of clamps on the periphery of the rotor are clamped and suspended, and each wrapped bag is transported along each circular bag by rotating the rotor while being wrapped. A rotary bag filling and packaging apparatus is disclosed that heats and seals the opening edge of each package bag with a pair of seal bars while injecting heated steam into the package bag. In this apparatus, since the heated steam sealed in the sachet condenses with time, food such as meatballs can be sealed in a vacuum.

  However, in the above-mentioned Patent Document 1, it is expected that the heating steam is jetted to the empty bag if the package is not filled with the package, and the opening edges of the empty bag are paired. At the same time, it is expected that the seal bar of this type will seal.

  However, in Patent Document 2 below, a sensor for detecting the presence or absence of an object to be packaged inside the package is arranged on the circular orbit of the package to be transported, and when the empty bag passes through the sensor installation position, Since the signal indicates that the sealing action on the empty bag is stopped and the empty bag is recycled as it is without being released from the clamp, it is transported to the package filling position. For example, in Patent Document 1, it is easy to stop the injection of the heating steam to the empty bag and the sealing of the empty bag opening edge.

  However, if the injection of the heating steam from the nozzle is stopped for the empty bag, the heating steam will condense in the nozzle during the stop time, and extra hot water will be supplied to the subsequent packing bag. The mixing ratio of the hot water to the food in the subsequent sachet increases, and the frequency with which the hot water condensed in the nozzle adheres to the subsequent bag mouth increases, which may cause a problem of reducing the sealing effect of the bag mouth.

Japanese Patent Laid-Open No. 9-95311 JP-A-1-124521

  Therefore, in order to eliminate the above problem, the present invention suspends both sides of the wrapping bag with clamp pairs provided on the periphery of the rotor, and intermittently conveys the wrapping bag along a circular track by the rotation of the rotor. On the other hand, in the vacuuming device for a rotary bag-filled package, the steam is injected into the sachet through the nozzle in the steam erection section, and the opening edge of the sachet is heated and sealed with a pair of seal bars in the seal section. The suction cylinder installed near the wrapping stop position of the section, a suction device that helps liquefy the heated steam sucked through the suction cylinder, and the nozzle is moved between the wrapping stop of the steam ejection section and the suction cylinder Switching means and a sensor for detecting an object to be packaged in the package that intermittently conveys the circular path are provided, and the empty bag detected by the sensor reaches the vapor ejection section. When only while displacing toward the suction tube to the nozzle with the signal from the sensor from the wrapper stop of the. The heated steam ejected from the nozzle is configured to be absorbed by the suction device through the suction cylinder.

  When an empty bag in which an object to be packaged that is intermittently transported on a circular track has not been detected reaches the vapor ejection section, the nozzle is directed from the stop of the packing to the suction cylinder by a signal from the sensor. This prevents the steam from being ejected into the empty bag that is displaced and hinders the reuse of the empty bag, while the heated steam ejected from the displaced nozzle is absorbed by the suction device through the suction cylinder and promotes liquefaction. In addition, there is an effect that it is possible to prevent an increase in the humidity of the workplace due to the jet of steam.

  As shown in FIG. 2 showing the plane and FIG. 3 showing the cross section, the rotary bagging and packaging apparatus supports the central shaft 11 of the circular rotor 10 on the bearing 13 of the machine base 12, and the rotor 10 has 2 on its periphery. 8 sets of crank arms 14, one set of books, are supported by pins 15. Each clamp arm is provided with a clamp 16 for holding a sachet at the tip, and a coil spring installed in a pipe clamp arm 14 holds the clamp 16 in a normally closed state. When compressed, the clamp 16 opens.

  When the power of the motor 18 is transmitted to the central shaft 11 via the intermittent rotating machine 19, the rotor 10 rotates intermittently at a pitch corresponding to the interval between the eight clamp arms 14. Therefore, by supplying the packaging bag 20 loaded in the bag feeding section (1) (circled number 1) toward each clamp 16, the packaging bags supported by these clamps are intermittent along the circular orbit by one pitch. Transported.

  Since the pair of pins 15 are connected via the pair of fan gears 21, the force of the tension spring 22 disposed between the arms 14 acts to press the lever 23 against the peripheral surface of the all-around cam 24. Each set of clamps 16 opens and closes in accordance with the shape of the circumferential cam 24 during movement and reaches the filling section (3) via section (2) (circled number 2). The package can be filled, and the sensor 26 installed in the detection section {circle around (4)} electrically detects the presence of the package in the package 20. If the package is not filled, the clamp 16 is recycled while holding the empty bag in section (8), and the package is refilled in the empty bag in the filling section (3).

  In the steam jetting section (5), as shown in FIG. Specifically, a rod 33 is slidably supported on a longitudinal sleeve 32 fixed via a frame 31, and the nozzle 30 is swung via a pin 35 at an end of a collar member 34 extending laterally from the rod 33. Supports freely. The upper end of the nozzle 30 is connected to a steam generator 37 via a flexible pipe 36, and the on / off valve 38 controls the steam ejection interval at the nozzle 30 in accordance with the arrival of the bag 20.

  As shown in FIG. 8, the flat nozzle 30 is configured such that the upper base portion 71 is hermetically inserted and fixed to the lower end of the pipe 70, and heated steam supplied from the joint 74 into the pipe 70 is supplied to the lower portion of the pipe 70. In this structure, the nozzle 30 is ejected from a hole 72 opened on the side surface. In this case, the water to be drained is removed from the bottom of the pipe 70 through the tube 73.

  When the rod 33 is pulled down and the nozzle 30 is inserted into the wrapping bag 20, as shown in FIG. 4, heating steam is sprayed from the nozzle 30 for a certain period of time while the pair of clamps 16 are separated to tension the bag mouth. 2, the bag mouth is sandwiched between a pair of seal bars 58 and 59 and placed in the seal section (7) in FIG. It is evacuated by condensing heated steam sealed together.

  A suction cylinder 50 having an open upper end is disposed near the stop position of the wrapping bag 20 in FIG. 1, and the suction cylinder 50 is connected to a suction device 52 via a hose 51. On the other hand, the first motor 40 that supports the lower end of the bracket 39 hanging down from the collar member 34 corresponds to a part of the position switching means of the nozzle 30. The first motor 40 is formed of a fluid cylinder, and the first motor is connected to a lever 41 fixed to the pin 35. If the first motor 50 is configured by an electric motor, the shaft of the electric motor directly rotates the pin 35.

  The sensor 26 connected to the controller 53 is the same as the sensor 26 in the detection section (4) already described in FIG. When the sensor 26 detects an empty bag, the signal 54 emitted from the controller 53 operates the switching valve 55, moves the lever 41 with the fluid supply to the first motor 40, and switches the nozzle 30 in the direction of the arrow 56. As a result, the heated steam that should originally be jetted into the sachet 20 is discarded and jetted into the suction cylinder 50.

  The reason why the heating steam is not sprayed from the nozzle 30 into the empty bag and is discarded is that if the steam is jetted into the empty bag, the water condensed in the recycling bag when the empty bag is recycled and refilled with food. This is to prevent the taste of food from being impaired.

  On the other hand, if the heated steam is simply continuously discarded and jetted to the work place, the humidification of the work place will be increased, so that the heated steam is sucked from the suction cylinder 50 by the suction device 52. The metal material constituting the suction device 52 such as a blower or a vacuum pump has a sufficient heat capacity to liquefy the heated steam that touches it, and the sucked heated steam is treated as water to prepare the work environment of the workplace. Become. The suction of heated steam by the intake cylinder 50 is also effective in reducing the amount of water droplets adhering to the inner surface of the bag mouth as will be described later.

  In FIG. 1, the first motor 40 shows an example in which the nozzle 30 is swung toward the suction cylinder 50, but FIG. 5 shows a nozzle at the tip of a saddle member 46 that is supported by a machine base 44 via a pivot shaft 45. 30, and the nozzle 30 is usually disposed on the stop point of the bag 20 supported by the pair of clamps 16. As described above, when the sensor detects an empty bag, the first motor 47 uses the detection signal to point the saddle material 46 toward the suction cylinder in order to switch the pivot 46 in the clockwise direction on the horizontal plane. It is illustrated as rotating (like a virtual line).

  In the cold season, dew is generated on the surface of the nozzle 30 through which the heated steam passes, and when this dew adheres to the bag mouth, it becomes a harmful effect when the bag mouth is welded and sealed. In an environment where heated steam is ejected from the nozzle 30, condensation tends to be promoted at the nozzle. Therefore, a pair of heating bars 61 and 62 are installed in the water droplet removal section (6) in FIG. As shown in FIG. 6, the heaters 63 are provided inside both the heating bars, and the screws 64 directed from the both ends of the heating bar 61 on one side to the heating bar 62 on the other side are required between the heating bars 61, 62. It is the limiting device 65 which regulates the approach of. That is, the screw 64 restricts the narrowing so that a ventilation gap 66 of 0.1 to 0.3 mm remains between the bag mouths of the sachet 20 supported by the clamp 14 as shown in FIG.

  4 is a front view in which the bag mouth is tensioned to both sides by the pair of clamps 16 in the section (5) of FIG. 2 and the heated steam is injected into the sachet 20, and then the nozzle 30 is moved upward. When pulled out, the bag mouth is not completely sealed because the bag mouth is loose. For this reason, when placed in the water drop removal section (6), the bag is narrowed by a pair of heating bars 61 and 62 so that a ventilation gap of 0.1 to 0.3 mm is formed in the bag mouth as shown in FIG. The ventilation gap is formed intermittently due to loosening of the mouth.

As shown in FIG. 7, the pair of heating bars 61 that narrow the bag mouth heat the water droplets in the bag mouth to evaporate. In this case, due to the condensation of the heating steam inside the sachet, air is sucked in from the outside of the sachet through the ventilation gap 66, and this movement of air contributes to evaporating water droplets attached to the bag mouth. On the other hand, the inflow of air from the outside of the sachet affects the evacuation inside the sachet. However, the condensation rate of the heated steam in the water droplet removal section {circle around (6)} is in the initial state of condensation, and the intermittent 0.1 to 0.3 millimeter ventilation gap 66 in the bag mouth is finally limited to the necessary limit. The amount of inflow air is limited so that a vacuum can be achieved.

Side view of main equipment Rotary packaging equipment top view Side view of previous figure Front view showing heated steam jetting into a sachet Different embodiment diagram Partial explanatory diagram of the heating bar Cross-sectional enlarged view of the previous figure Illustration of nozzle

Explanation of symbols

(3) Filling section (4) Detection section (5) Steam ejection section (6) Water drop removal section (7) Seal section 10 Circular rotor 16 Clamp 20 Pouch 26 Sensor 30 Nozzle 40, 47 ... 1st motor (switching means)
50 ... Suction cylinder 52 ... Suction equipment 58, 59 ... Seal bars 61, 62 ... Heating bar 65 ... Restriction device 66 ... Ventilation gap

Claims (2)

A pair of clamps provided on the periphery of the rotor suspends both sides of the wrapping bag and suspends it. Heating the wrapping bag through the nozzle in the steam ejection section while intermittently transporting the wrapping bag along the circular path by rotating the rotor. In a vacuuming device for a rotary bag-packed package in which steam is injected and the opening edge of the bag is heated and sealed with a pair of seal bars in the seal section,
Between the suction cylinder installed near the wrapping stop position of the steam ejection section, a suction device that helps liquefy the heated steam sucked through the suction cylinder, and between the wrapping stop of the steam ejection section and the suction cylinder A switching means for moving the nozzle, and a sensor for detecting an object to be packaged inside the package that intermittently conveys the circular path,
Only when the empty bag detected by the sensor reaches the vapor ejection section, the nozzle is displaced from the wrapping stop toward the suction cylinder by a signal from the sensor. A device that absorbs heated steam ejected from a nozzle through a suction cylinder by a suction device. A water drop removing section is disposed between the steam ejection section and the seal section in claim 1, and a pair of heating bars are installed in the water drop removing section, so that an extremely thin air gap is left between the bag mouths. 2. The apparatus according to claim 1, wherein a restriction device is provided to restrict the approach of the heating bar to 0.1 to 0.3 mm, and water droplets adhering to the inner surface of the bag mouth that is constrictively heated by the pair of heating bars are removed. Equipment.