JPS601211B2 - vacuum packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for filling a bag with a liquid-containing item to be packaged and vacuum packaging the bag.

For example, when supplying pickles such as Fukujinzuke to the market, it is necessary to package them together with a large amount of seasoning liquid so that the taste does not change. are generally vacuum packed.

A machine in which pickles, for example, are placed in a bag, a seasoning liquid is supplied, and vacuum packaging is performed in a series is commonly referred to as a bagging vacuum packaging machine. This type of rotary vacuum packaging machine generally uses a pair of chucks to hold the opening of the bag containing the items to be packaged, and performs packaging operations while transporting the bag in a suspended state to prevent liquid from overflowing. However, due to the nature of the packaged items, a considerable amount of weight is added to the bag, which inevitably causes distortion at the bag opening. For this reason, when the bag opening is melt-sealed, small wrinkles are formed, which tends to impair the airtightness of the bag. In view of the above points, the present invention provides a seat plate to support the bottom of the bag at the lower front of a board provided with a pair of chucks for suspending the bag, and a seat board for supporting the bottom of the bag, and a seat board for automatically removing the bag from the board. The seat plate is configured to rotate around a shaft, and a latch, which is usually interposed between the board and the seat plate and is used to keep the seat board horizontal, is fixed to the shaft. An element is provided for applying an external force to a lever provided at one end of the lever to rotate the blade, thereby tilting the seat plate or returning it to its original horizontal state.

The seat plate is operated using rotational power of the motor, and while the support of the seat plate prevents the bag from becoming distorted, the sealed bag can be automatically ejected from the machine. This is how it was done. Embodiments of the present invention will be described below based on the drawings. The rotor 1, which is octagonal in plan view as shown in FIG. 1, is supported on a pedestal 3 via a ball bearing 2 as shown in FIG. In response to an input, the rotor is caused to rotate intermittently by one-eighth angle on the pedestal 3. The rotor is provided with plates 7, 7, . . . each having a pair of chucks 676 on eight surfaces around the rotor. Specifically, as shown in FIG. 3, the chucks 6, 6 are fixed to the upper ends of the arms 8, 8, respectively, and the lower ends of these arms are connected to the plate. It is pivotally supported via shafts 9, 9. As shown in FIG. 6, the respective shafts 9, 9 pass through the back side of the board 7, and sector gears IQ are respectively fixed to these shafts;
They're comparing IQ's to each other. In addition, an oscillator 11 and a tortoise are fixed to the two oscillators 9, 9, respectively, and coil spring wings 13 are installed between these oscillators 11 and the pins 12, 12 on the back side of the board. Furthermore, a wheel turtle 5 is rotatably supported at the tip of a lever 14 fixed to a shaft on one side.As shown in detail in FIG. The rotor 6c is composed of a rotor 6c rotatably provided via a rotor 6b, and a spring 6d provided between the stator and the rotor, and the rotor 6c is compressed by applying mechanical force in a direction to compress the spring 6d. The board 7 has an open structure.
A seat plate 7 for supporting the bag is rotatably supported on the front surface of the bag and can be fixed in a substantially horizontal state using a locking mechanism. The relevant drawings of such a mechanism are shown in FIGS. 3-6. In other words, the seat plate 17, which has an L-shaped side surface, is connected to the pin 16, and the bearing 18 is fixed to the front surface of the panel
The operating pin 20 is rotatably supported by a pair of bearing pieces 19, 19 protruding from the back surface of the seat plate 17, and the lever 21 is fixed to the pin. A spring 24 is provided between the piece 22 fixed to the shaft 20 and the pin 23 on the side surface of the bearing 18, and the operating pin 2
An operating lever 25 is provided at one end of the 0. On the other hand, as shown in FIG. 2, a bearing 27 is installed inside the cylindrical shaft 4 at the center of the rotor blade.
An arm 29 fixed to the upper end of the core shaft 28 projects in the circumferential direction of the rotor as shown in FIG. Two bars 30, 30 are supported in parallel and their rotation is limited by torsion coil springs 31, 31, and a flexible bag expansion plate 32 is attached to each of these bars.
, 32 are provided downward.

Further, a rotatable and bendable joint 33 is interposed near the lower end of the core shaft 28', and the lower end of the core shaft 28 is engaged with a cam 35 via a lever 34. Further, in the upper part of the joint 33, the core ball 28' connects the fixed crank arm 36 and the swinging member 37 via a link 39 having a flexible pin 38 as shown in FIG. 37 are connected to a cushion cylinder 40 and a tension spring 41, respectively. As shown in Figure 8
The following eight types of mechanisms are provided around the square rotor.

In other words, ``a bag supply mechanism A is provided on the left side of the drawing, and from this mechanism in a clockwise direction, a bag expansion mechanism and a packaged material filling mechanism C are installed.
A pushing mechanism D, a liquid replenishing mechanism E, a first vacuum mechanism F, a second vacuum mechanism G, and a sealing mechanism are provided respectively.The bag feeding mechanism A is equipped with a large number of thermoplastic bags Z. The bags are stacked one on top of the other, and these bags are mechanically inserted into a pair of chucks 6,
6, and the chuck clamps both side edges of the bag. Next, in the bag expansion mechanism B, the pipes 44, 4 are moved to the vacuum suction cup 4 at the tip by the reversing action of the bell crank 43.
5 and 45 enlarge the mouth of the bush release bag Z symmetrically. A hopper 46 is installed in the package supply layer C. As shown in FIG. 7, an arm 47 for fixing the hopper 46 is supported by a rod 48', and the rod is connected to a lever 49.
The cam 581 is engaged via the cam 581. . The pushing mechanism D has a piston 51 provided at the other end of the arm 47. The liquid replenishment mechanism E has a nozzle 53 connected to a tank 52. Both the first vacuum mechanism F and the second vacuum mechanism G are provided with an operation box 56956. In particular, the operation box 56 in the second vacuum mechanism is provided with a pair of rotary heating sealers 57, 57 inside, and these sealers can be operated from the outside by an air cylinder 68. Furthermore, a pair of rotary heated sealers 60, 60 are provided which are operated by the sealing mechanism regulating bar 59. The illustrated embodiment is constructed as described above, and its operation will be explained below.

When the chucks 6, 6 are supplied with the bag Z in the bag supply mechanism A in FIG. , 45.

Immediately after that, as shown in Figure 2, the suction cups 45 adsorbed on both sides of the bag Z
, 45 are displaced in opposite directions to enlarge the mouth of the bag Z. Immediately thereafter, the minimum protrusion of the constantly rotating cam 35 and the bar 34 come to oppose each other, and the tensile force of the spring 62 causes the arm 29 to descend from the position of the imaginary line 29a to the position of the solid line, and the pair of expanded The bag plates 32, 32 are inserted into the mouth of the bag Z, and at the same time, the arm 29 overlaps the front surface of the attack panel 63 fixed to the upper surface of the rotor. Immediately after that, the suction action is stopped and the bag Z is released from the suction cups 45, 45. Next, Rotor 1 makes another 1/8th turn.

In this case, the attack panel 63 pushes the arm 29, but since there is a rotatable joint 33 at the lower end of the core shaft 28 as shown in FIG. The bag is moved together with the bag to below the hopper 46 while being inserted into Z. (In other words, refer to the state of arrow K in Fig. 1.) Immediately after that, as shown in Fig. 7, the cam 5 constantly rotates.
When the smallest diameter portion of 0 faces the lever 49, the rod 48 is pulled down by the spring 64 and the hopper 4
6 as shown in the imaginary line. As a result, the opening of the bag 46 is inserted into the bag Z while expanding the pair of bag expansion plates 32, 32, thereby facilitating the supply of the packaged items to the bag. The hopper 46 is then moved upward again by the cam 501.
Immediately after that, the core shaft 28 is pushed up by the action of the cam 35 shown in FIG.
is returned to the bag expansion mechanism B together with the arm 29 by the reaction force of the spring 41. More specifically, as shown in FIG. 8, when the arm 29 for supporting the bag expansion plate rotates in the direction of the arrow K as described above, the crank arm 36 stretches the spring 41 via the link 39. In this case, the piston of the cushion cylinder 40 is pushed into the cylinder 40 as indicated by the arrow KI in FIG. 9, but no resistance is applied because the air is discharged through the check valve 65 in a free flow. Next, the arm 29 is moved by the arrow L due to the reaction force of the spring 41.
When the arm 29 returns to its original position as shown in FIG. do. Next, the bag supplied with the article in the packaged article supply mechanism C is sent to the pushing mechanism D.

The piston 51 is connected to the hopper 46 via an arm 47 and works together with the hopper to push the articles to be packaged in the bag Z towards the bottom of the bag. In response to such a pushing action, since the bag Z is supported in advance on the seat plate 17 as shown in FIG. 4, the bag will not come off from the chuck 6. Next is bag Z
is sent to the liquid replenishment mechanism E, and replenishes the seasoning liquid into the bag through the nozzle 53.

Next, when the bag Z is sent to the first vacuum mechanism F, the operation box 55
The bag is placed in the airtight chamber in close contact with the board 7. Immediately after that,
The inside of the airtight chamber is evacuated via the hose 67. In this case, a vacuum pump with a smaller suction capacity is used for the first operation box 55 compared to the suction capacity of the vacuum pump used for the second operation box 56, and the upper limit of the vacuum value in the airtight chamber is about 70 HG. When it reaches this point, the suction action of the pump is stopped. In other words, if the degree of vacuum is rapidly increased to a vacuum value higher than that, the liquid inside the bag will boil due to the sudden generation of air bubbles and overflow out of the bag.
If the bag stop time in the first vacuum mechanism F is set to 3 seconds, the vacuum value will reach 700 HG in the first 2 seconds, and then the vacuum value will be maintained at that vacuum value for the remaining 1 second. . By doing this, air bubbles in the bag, such as between leaves of pickled vegetables or between fiber layers, are exhausted to the extent that boiling does not occur. When the operating box 55 of the first vacuum mechanism F is separated from the panel 7 and the airtight state is released, the rotor moves the bag Z to the second vacuum mechanism G.

At this point, the operating box 56 contacts the panel 7 to secure the bag in the airtight chamber, and at the same time a vacuum is applied via the hose 68.
In this case, the suction capacity of the pump is relatively large, and the pressure inside the airtight chamber rapidly drops to 760 HC. However, the applicant believes that the boiling phenomenon does not occur. This is because the amount of air bubbles in the pickles has been considerably reduced by the primary vacuum effect, and the air bubbles that have been suppressed from rising in the relatively upper part of the pickles are at atmospheric pressure when the first operating box 55 is opened. is thrown out of the bag by the impact. Although the inside of the bag is exposed to air while the bag Z is being transported from the first vacuum mechanism F to the second vacuum mechanism G, there is no chance for air to sneak into the pickles within about 0.5 seconds. Therefore, we believe that the amount of bubbles in the bag when it reaches the second vacuum mechanism G is not large enough to cause the liquid to overflow outside the bag even if the degree of vacuum is rapidly lowered. As described above, when the air bubbles in the bag are removed in the second operating box 56, mechanical force is applied from below to the lever 14 in FIG. Tense your mouth and then heat sealer 57,5
Step 7: Apply heat to the bag for a relatively short period of time to melt and seal the bag opening. This sealing is not complete in terms of time, but is only just barely there.However, when the second operating box 56 is opened, the bag opening is affected by atmospheric pressure from outside, so no impact beyond a certain level is applied. Air cannot enter the bag unless the bag is closed.The bag is then transported to a port sealing machine where heat is applied to the bag opening for a sufficient period of time to melt and seal the bag opening.

At the point 701 shown between the melt sealing mechanism and the bag feeding mechanism A in FIG. 1, a climbing impact rail 70a is provided as shown in FIG. It is starting to ride up. As a result, as shown in FIG. 5, the operating lever 25 rotates from the imaginary line to the solid line position as shown by the arrow EOM while stretching the spring 23, which has a relatively small spring force. The rotation of the lever 25 simultaneously rotates the blade 21 via the operation pin 20. As shown in FIG. 4, normally the latch 21 is stretched between the board 7 and the wall of the seat plate 17 to maintain the horizontal state of the seat plate 17, but when the latch 21 rotates as shown in FIG. 17 tilts around the pin 16, so the bags on the seat plate fall downward. Note that there is also a point 7 between the bag expansion mechanism B and the packaged material supply mechanism C in FIG.
1, and at this point, an impact rail is installed that pushes down the operating lever 25 in the direction opposite to the arrow M as shown in Figure 5, so the seat plate 17 returns to the horizontal state and maintains that state. The bellows 21 functions as a locking mechanism.

Although the rotor 1 shown in FIG. 1 has an octahedral shape, the pushing mechanism D may not be provided depending on the type of the packaged object, so the rotor is configured to have at least a heptahedral shape.

As described above, the present invention supports an inverted L-shaped seat plate IT on the front side of the board 7 via a pin 16, and also supports an operating pin 20 supported by a bearing piece 19 on the back side of the seat plate and a tortoise 9. Fix the blade 21 and use the tension of the spring 24 to move the blade 2 to the board 7 seat plate 1.
7 to hold the seat plate 17 horizontally, while the two types of impact elements provided along the rotational trajectory of the rotor push the operating pin 20 into the operating lever 2.
5, the seat plate 17 can be automatically held horizontally or tilted, and the bottom of the bag Z can be supported by the seat plate 17. Since the bag Z can be prevented from slipping from the chucks 6, 6, there is no problem in handling heavy objects containing liquid, for example.Furthermore, since the weight of the objects to be packaged is not added to the bag, the opening of the bag may become distorted. Therefore, when the bag opening is sealed, a wrinkle-free seal can be achieved and the product's airtightness can be maintained.Furthermore, the seat plate 17 can be operated using the rotary power of the rotor without using a special motor. The bag after packaging can be easily dropped from the seat plate 17.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the row 0 line of the previous figure, Fig. 3 is a view taken along the mm line of the turtle figure, and Fig. 4 is a plan view showing an embodiment of the present invention.
The figure is a vertical cross-sectional view of the previous figure, FIG. Cross-sectional view "Figure 8 is a perspective view of the plate in Figure 2, and Figure 9 is a partial schematic diagram of the previous figure. 1... Rotor, 6... Chuck, 7... Board, 17... …
・Seat plate, 18...Bearing, 19...Bearing piece,
20... operation pin, 21... bellow, 25.
...Operation lever, 28... Core shaft, 29...
...Arm, 32... ...Gallside plate, 36...Crank arm, 37...Rocking member, 40...Cushion cylinder, 41...Tension spring, 45...Sucker, 46... Hopper, 53...Nozzle, 5
5... Operating box, 56... Operating box, 57
...Heating sealer, 60...Heating sealer, 70a
...Impact rail, A...Bag feeding mechanism, B...
...Bag expansion mechanism, C...Packaged article supply mechanism,
D...Pushing mechanism, E...Liquid replenishment mechanism, F...
...First vacuum mechanism, G...Second vacuum mechanism, H...
...melting mechanism, Z...bag. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. A large number of plates 7, 7... are vertically fixed around the rotor 1 which is arranged to rotate intermittently, and the bag Z is suspended by a pair of chucks 6, 6 provided on each plate. In the packaging device, the bag is supported, and after the rotor is rotating and the packaged items are supplied to the bag, a vacuum is applied to the bag, and the opening of the bag is further melt-sealed. An inverted L-shaped seat plate 17 for supporting the bag is pivotally supported on a bearing 18 via a horizontal pin 16, and an operating pin 20 supported horizontally on bearing pieces 19 on the back side of the seat plate. The propeller 21 is fixed, and the propeller 21 is pushed between the board 7 and the seat plate 17 by the tensile force of the spring 24 provided between the piece 22 provided on the operating pin and the pin 23 fixed on the bearing. While the seat plate 17 is held in a horizontal state by being taut, an impact is applied to the operating lever 25 provided at the end of the operating pin 20 at locations 70 and 71 along the rotational trajectory of the rotor 1. An impact element 70a that rotates the propeller 21 clockwise to eliminate the tensioning action on the seat plate and another impact element that rotates the propeller 21 counterclockwise and returns the propeller to its original state are provided. Vacuum packaging equipment.