JPS581447Y2 - vacuum packaging machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vacuum packaging machine that deaerates and packages the packaged items between two upper and lower films in a pair of upper and lower boxes, and the welding of the upper and lower films is effective even in a cold environment. It is characterized in that it seems to improve the

Conventionally, as shown in FIG. 3, an upper box 1 is moved up and down using a pin 3 as a fulcrum to open and close the insides of the upper box 1 and lower box 2, and the packaged items 4 are placed inside these upper and lower boxes. While being sandwiched between the upper and lower films 5 and 6, the insides of the boxes 1 and 2 are deaerated via pipes 7.8 connected to the boxes 1 and 2, and the article 4 to be packaged is sandwiched between the films 5 and 6. Vacuum packaging equipment for degassing and packaging has been provided.

In addition, this spit packaging machine heats and softens the upper film 5 by using a heater outside the upper box or a heater 9 provided inside the upper box 1 as shown in the figure, so that it follows the shape of the packaged object 4, and the lower film 6 Considerations have been made to improve the welding effect on the

However, when trying to increase packaging efficiency, the upper and lower boxes 1 and 2
While packaging is being carried out through a complicated process of closing the box, degassing and pressurizing, a large number of items to be packaged are arranged on a predetermined panel outside the box via the lower film. As soon as the box 1.2 is opened, it is necessary to quickly replace the panel with the panel inside the box.

In other words, the panel 10 shown in FIG. 3 is simply placed on the table 11 and can be easily replaced, so it does not have any heating function for the lower film 6.

Therefore, especially in packaging operations carried out in cold regions or in low-temperature sterile rooms, the temperature of the panel 10 is low and the lower film 6 is cooled accordingly, resulting in a disadvantage that the weldability of the films 5.6 is low.

In view of the above points, the present invention is designed to improve packaging efficiency by forming the panel on which the packaged item is placed using a foam material to prevent the temperature of the panel from decreasing in a cold environment.

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

The vacuum packaging machine shown in FIG. 1 consists of a vacuum packaging device consisting of upper and lower boxes 15 and 16 and a pressure control section 17, and a panel 18 that can be inserted into and taken out of both boxes.

The upper box 15, which can move up and down using a pin 19 as a fulcrum, has a heater 20 inside, while the lower box 16 has a table 22 inside via legs 21. The connected lines 23 and 24 are connected to the vacuum line 26 and the pressurizing line 21 via a three-board type switching valve 25 in the pressure control section 11.

On the other hand, the panel 18 is constructed by filling a reinforcing tray 29 made of a light alloy plate with a foamed material 30 such as foamed Suburol, as shown in FIG. It is formed by applying a coating 31.

The present invention is constructed as described above, and its operation will be explained below.

After placing the panel 18 with the lower film F2 and the packaged material A supplied on the table 22 outside the box 16, the shaft 3
2 and pull out the upper film F1 onto the object to be packaged A, further move the upper box 15 down, and then connect the lines 23 and 24 to the vacuum line 26 using the switching valve 25, and the upper film F1 will be pulled out onto the packaged object A. Since the inside of the upper box 15 and the inside of the lower box 16 which are separated from each other become a vacuum, when the atmosphere or pressurized air is introduced from the pressurizing line 27 by operating the switching valve 25, the upper and lower films F1.
F2 closely contacts the packaged item A so as to pinch it.

Thereupon, the upper and lower boxes 15, 160 are opened, replaced with another panel, and the above-mentioned packaging operation is repeated and continued.

Although the foamed material 30 was described as being made of synthetic resin in the above embodiment, it is of course possible to use foamed metal, for example.Also, a large number of the panels 18 may be connected by an endless chain, and these panels may be conveyed by conveyor. Alternatively, the material may be transported sequentially and intermittently into the upper and lower boxes 15 and 16.

Like the above, the present invention has a pair of upper and lower boxes that are displaced in the vertical direction to open and close the inside, each connected to a vacuum line and a pressure line via a switching valve, and objects to be packaged in these upper and lower boxes. A vacuum packaging device for vacuum packaging between upper and lower films, and a panel formed of a foam material for placing the items to be packaged through the lower film and sequentially supplying the items into the lower box. Since the foamed material 30 has heat retaining properties that are not greatly affected by room temperature, the temperature of the panel will not become extremely low even if packaging work is performed in a cold region or in a low-temperature sterile room.

Therefore, the temperature change of the lower film is smaller than that of conventional metal panels, which have a large temperature change, so the weldability of the upper and lower films is good.

Therefore, the time required to heat the lower film in the box can be saved.
While the packaging efficiency is improved, in particular the panels are made of foam material 3
0 is placed in a reinforcing tray 29 made of a hard material, and a coating 31 with good releasability is applied to the top surface of the foam material, so that when the inside of the vacuum box is depressurized, the foam material expands. It also prevents the air in the foaming chamber from leaking into the vacuum box, without affecting the quick attainment of vacuum inside the box, and furthermore, the coating 31 prevents the film F2 from leaking into the foaming material 30. Since it prevents welding, it has the effect of being lightweight and improving workability.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main parts of the previous example, and FIG. 3 is an explanatory diagram of a conventional example. 15... Upper box, 16... Lower box, 18... Panel,
20... Heater, 26... Vacuum line, 27...
Pressure line, 29... Reinforcement plate, 30... Foaming material, 3
1... Film, A... Item to be packaged, Fl... Upper film, F2... Lower film.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower boxes that are displaced vertically to open and close the interior are connected to a vacuum line and a pressure line through switching valves, respectively, and items to be packaged are vacuum-packed between upper and lower films in these upper and lower boxes. In order to place the items to be packaged and sequentially supply them into the lower box through the lower film, a reinforcing tray made of a hard material is filled with foam material. A vacuum packaging machine consisting of a panel formed by applying a film with good releasability on the top surface.