JPS5855053B2 - vacuum packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides vacuum packaging for bagged and packaged products, which comprises two conveying devices arranged in parallel and substantially two vacuum boxes separated from each of these conveying devices. It's about machines.

Conventionally, for example, as shown in Japanese Unexamined Patent Publication No. 51-80479, the packaged items are intermittently transported by a transport device such as a trolley, and while the transport device is stopped, they are placed in a vacuum box. There is provided a product in which the packaged product is vacuum packed in a bag.

However, unlike general bag-forming and packaging, vacuum packaging requires reducing the pressure inside the vacuum box, which consumes a lot of time, and therefore reduces work efficiency significantly compared to general packaging.

In particular, in the vacuum packaging method disclosed in the above-mentioned publication in which bags are transported by a transport device, relatively large bags are often used, and therefore it takes a long time to depressurize the vacuum box.
, the work efficiency is that bad.

Therefore, it is conceivable to use multiple packaging machines simultaneously for this type of packaging to improve packaging efficiency.

Logically, it goes without saying that if one worker can handle two packaging machines, efficiency will be doubled, but this is not necessarily the case because the machine equipment and power costs are uneconomical. It cannot be said that satisfactory results can be obtained.

In view of the above points, the present invention installs a central box with chambers on both sides separated by a wall in the middle between two transporting devices, and also installs a central box with chambers on both sides of several boxes separated by the transporting device. When two boxes are provided, and the box on the middle side and the box on one side outside are in close contact, the box on the other side is separated from the box on the middle side, and symmetrically, the box on the other side and the box on the middle side are separated from each other. When the boxes are in close contact with each other, the box on one side and the box in the middle are operated to separate from each other;
A switching control valve is provided to alternately connect the chambers on both sides of several boxes to the vacuum pump in response to the movement of the middle box, thereby improving economy and efficiency.

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 most clearly represents the outline of the embodiment of the present invention.

That is, in this embodiment, two transport devices 1.2 are installed in parallel.

These conveying devices 1.2 are equipped with a large number of tables 5a on endless chain wheels 4 stretched over chain wheels 3, 3, respectively.
.

5b... at equal intervals, and both chains 4
．． A total of 3 boxes in the 4th room and outside of both rooms 6.7,
8 was installed.

More specifically, as shown in FIG. 1, each of the Cheno wheels 3, 11, .
..., and a part of the link 4a of the chain wheels 4, 4 stretched over these chain wheels is extended, and the table 5 is fixed to the link.

Further, on the upper part of the base 10, an appropriate number of legs 12, 12...
A bed 13 is placed through the container, and the container boxes 6, 7, and 8 are placed on top of the bed 13 in a mounting manner.

As shown in FIG. 2, the bed 13 is installed so as to be located inside the loop of the chino 4.
The existence of this does not impede the movement of Cheno 4.

More specifically, two pinions 15.16 are rotatably supported on the upper surface of the bed 13, and three rack gears 17.18.1 are placed between these pinions 15.16.
9, and these rack gears 17, 18, 19 and the three boxes 6, 7, 8 are connected via supporting legs 20, 21, 22.

The rack and pinion mechanism described above consists of two sets as shown in FIG. The other ends are respectively connected to reel foils 25 and 26.

Among the three boxes, the middle box 6 forms chambers 29, 30 on both sides with a middle wall 28 in between.

Each of these chambers is open on its outer side, and within these compartments 29, 30 each seal receptacle 3 is provided on said wall.
1.32.

Furthermore, two holes 33 and 34 are formed in the wall 28, and these holes are opened individually into the two chambers 29 and 30, and are connected to both the pot holes 33 and 34 as shown in FIG. The flexible pipes 35 and 36 are connected to a vacuum pump 38 via a switching control valve 37.

The control valve is a three-position, four-port electromagnetic valve, and its two electromagnetic parts 37a and 37b are respectively connected to microswitches 41 and 42 fixed to the top surface of the box via wires 39 and 40.

The outer box 7 faces these microswitches.
, 8 have attachments 43, 44 fixed to them.

The two outer boxes 7, 8 each form chambers 45, 46 whose inner surfaces are open, and sealers 47 are connected to piston-type actuators 48 in these chambers 45, 46, respectively. It is placed.

Further, ports 49 and 50 formed in each of the chambers are connected to atmosphere release valves 51 and 52, respectively.

The illustrated embodiment is constructed as described above, and its operation will be explained below.

In FIG. 1, when the reel wheels 25 and 26 are rotated alternately in opposite directions, these reels and the cheno wheel 23
．． The rack gear 17 connected via the rack gear 24 reciprocates left and right on the upper surface of the bed 13.

In FIG. 3, when the middle rack gear 17 moves to the right as indicated by the arrow, the pinion 15 on one side rotates clockwise, the pinion 16 on the other side rotates counterclockwise, and the two outer rack gears rotate. 18 and 19 both move to the left as indicated by the arrows.

In contrast, when the middle rack gear 17 is moved to the left, both outer rack gears 18, 19 are moved to the right.

1 and 3 show a state in which the box 6 in the middle and the box 7 on the left side are in close contact with each other, and from this state, when the box 6 in the middle fixed to the rack gear 17 in the middle is moved to the right, , the box 8 on the right approaches proportionally to the box 6, and the box 7 on the left moves away symmetrically.

By displacing the middle box 6 from side to side in this way,
Several boxes 6 and left and right boxes 7 and 8 sandwich one of the two transport devices (1 or 2) to form a sealed chamber alternately.

Moreover, in the state shown in FIGS. 1 and 3, the microswitch 41 on one side is activated by the resistance of the attachment 43, and the electromagnetic part 37a on one side is energized to connect the sealed chamber to the vacuum pump 38. , the inside of bag A on table 5 and its surroundings are gradually evacuated.

Then, the timer is used to calculate the time when the vacuum is reached, and the timer relay supplies fluid pressure to the actuator 48 to operate the sealer 47. After welding the mouth of the bag A between the bar 47 and the seal receiver 31, the timer switch is activated. Atmosphere is introduced into the box by switching the atmosphere release valve 51 on one side.

When the atmosphere is introduced into the room on one side, the middle box 6 is then displaced to the opposite side, and the outer box 8 facing it is displaced.
Close contact with.

For this reason, the microswitch 42 on the other side is activated and the switching control valve 37 is switched, so a vacuum is created inside these boxes.
Packaging work begins.

FIG. 4 shows a state in which the bags carried on the table 5a of the transport device 1 on one side are vacuum packed.

In this case, the space between the boxes 6 and 8 separated by the transport device 2 on the other side is wide open.

Boxes 6 and 7 (Thus, while vacuum packaging is being carried out, the bags are loaded onto the table 5b of the transport device 2 on the other side, and the table 5b is moved between the boxes 6 and 8 until the boxes 6 and 7 are separated). By transporting and placing the bag on the table 5b, immediately after the vacuum work on the boxes 6 and 7 is completed, the vacuum work on the bag I on the table 5b can be continued.

When the boxes 6 and 7 are opened, the table 5a therein is carried out of the box and the following table 5c is moved to the front of the box.

Therefore, if the bag is placed on the table 5C and then carried into the box 6.7, the vacuum work can be continued as soon as the boxes 6 and 8 are opened.

In this way, one vacuum pump is used constantly for the vacuum work on one side of the conveying device and the preparation work for the other side's conveying device, and the bags carried by both conveying devices 1 and 2 are Items to be packaged inside can be vacuum packaged alternately and continuously.

In the illustrated embodiment, the mechanism for symmetrically moving the boxes 7 and 8 on the art materials side opposite to the middle box 6I is performed using three rack gears 17, 18, 19 and two pinions 15, 16. However, such movement can also be performed by, for example, a link mechanism, so the structure is not limited to the illustrated embodiment.

Although the switching control valve 37 in FIG. 3 is of an electromagnetic type, it is also possible to use a mechanical type as shown in FIG.

The switching valve 37 is located within the valve box 54 with a spring 55 in between.
A pair of bush-type spools 56 and 57 are installed, and of the three ports formed in the valve box, one port 58 is used for the vacuum pump, and the other two ports 59.6
0 to the holes 33, 34 in the middle box 6.

As shown above, the vacuum packaging machine of the present invention has a central box with chambers formed on both sides separated by a wall in the middle between two transport devices, and the transport devices are installed on both sides of several boxes. Two other boxes are set apart, and when the middle box and the box on one side outside are in close contact, the box on the other side is separated from the middle box, and symmetrically, the box on the other side is separated from the box on the other side. When the boxes on one side and the middle box are in close contact with each other, the boxes on one side and the middle box are separated from each other. This system is equipped with a switching control valve that alternately connects the vacuum pump to the vacuum pump, so while vacuum work is being performed on the bags supported on one transport device, packaging preparation work can be performed on the other transport device. On the other hand, when the box in the middle is separated from the box on one side, it can be brought into close contact with the box on the other side, so one vacuum pump can be used almost constantly, improving packaging efficiency. can.

This means that the machine equipment costs are lower compared to one worker handling two vacuum packaging machines, and in particular, one machine can cover the vacuum pump and its power machine, which have a high equipment cost ratio with this type of equipment. This has a great effect on this point, including the cost of power and fuel.

[Brief explanation of drawings]

FIG. 1 is a sectional view in front view showing an embodiment of the present invention;
2 is a view taken along the line ■--■ of the previous figure, FIG. 3 is a plan view, FIG. 4 is a schematic plan view, and FIG. 5 is a sectional view of the bulb. 1.2...Carrying device, 5...Chiefle, 6,78...L 13...Head, 15.16...Pinion , 17, 18.19
......Rack carrier, 23°24...Wire 29.30...Chamber, 38...Vacuum pump, 41,42...Micro switch ,
45, 46...Room.

Claims (1)

[Claims] 1. Two transport devices 1 and 2 that support bags containing products to be packaged at predetermined intervals and alternately and intermittently operate to supply the bags to a vacuum packaging work position, and both transport devices at the vacuum packaging work position. A middle box 6 is provided between the apparatuses 1 and 2, with chambers 29 and 30 on both sides separated by a wall in the middle, and the outer surfaces of each of these chambers are open. Chambers 45 and 46 are formed on both sides of the chambers 45 and 46, which are installed facing each other with the transport devices 1 and 2 separated from each other, and which have openings on the surfaces facing the box 6.
When the boxes 7 and 8 and the box 6 in the middle move in both directions, when the several boxes 6 and the box 7 on one side come into close contact with the transport device 1 on one side, When the box 8 on the other side is separated from the box 6 in the middle, and symmetrically, when the box 6 in the middle and the box 8 on the other side are in close contact with each other with the conveying device 2 on the other side in between, A control device moves the side boxes 7 away from the middle box 6, and a vacuum pump 3 moves the chambers 29 and 30 on both sides of several boxes in response to the movement of the middle box 6 in both directions.
A vacuum packaging machine comprising switching control valves 37 arranged to alternately communicate with 8 and 8.