JPS58125425A - Vacuum packer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum packaging apparatus suitable for vacuum packaging products such as fish cakes, hams, and other foods with synthetic resin films.

As a conventional vacuum packaging apparatus, one shown in FIG. 1, for example, is known. That is, an upper chamber 1 and a lower chamber 2 are combined into a pair of upper and lower chambers so as to be freely openable and closable.
A flat heating plate 4 is mounted inside the lower chamber 2 so that it can be lowered and returned to the upper position by a pressure cylinder 3, and a table 6 that can be raised and lowered by a pressure cylinder 5 is also mounted inside the lower chamber 2. This table 6 places a lower film 7 and an article to be packaged 8, and an upper film 9 is placed on the upper and lower chambers 1. y
) It is designed to be held between the peripheral edges 1m and 2a. The insides of the upper and lower chambers 1 and 2 are connected to a vacuum pump (not shown) through hoses 1.0 and 11 so that the interior can be evacuated and the atmosphere can also be introduced. 12 is the heater 4 of the heating plate 4
a This is the space used for the wiring section. For vacuum packaging, first, the packaged product 8 is placed on the table 6 together with the lower film 7, and the upper film 9 is held between the peripheral edges 1m and 2m of the upper and lower chambers 1 and 2, and the inside of the upper and lower chambers 1 and 2 is opened. Each of them is hermetically sealed, and while the upper chamber 1 is vacuum degassed, the flat heating plate 4 is lowered to approach the upper film 9, and the upper film 9 is brought into close contact with the heating plate 4 to be heated and softened.
The inside of the lower chamber 2 is vacuum degassed after a short delay, and when the vacuum is completed, the heating plate 4 is returned and raised, and then the table 6 on which the products to be packaged 8 are placed is raised toward the lower surface of the upper film 9, and the upper film is removed. 9 is pushed up, the packaged product 8 is positioned in the upper chamber 1, and the atmosphere is introduced into the upper chamber 1 to bring the softened upper film 9 into close contact with the packaged product 8, as well as the lower film 7t. After sealing, the atmosphere is introduced into the lower chamber 2 to complete the vacuum packaging process.

However, in such a conventional vacuum packaging device 9, the heating plate 4 that is lowered, returned and raised within the upper chamber 1 is essential, and the space 12 for the wiring part of the heater 41, the space for lowering and raising, etc. This tends to make the volume of the upper chamber 1 relatively large, and a driving device for lowering and raising the heating plate 4 is also required, which complicates the overall structure of the upper chamber 1. Furthermore, the volume of the upper chamber 1 tends to be relatively large, and the structure of the entire upper chamber 1 becomes complicated. There was a problem in that it was necessary to take into account the time required for the plate 4 to descend and rise.

This invention was made by focusing on these conventional problems, and it is a vacuum packaging device that has improved the structure of the heating plate, simplified the overall structure of the upper chamber, and shortened the processing time for vacuum packaging. We aim to provide the following. Specifically, the vacuum packaging apparatus according to the present invention integrates a heating plate with a built-in heater on the lower surface side of the pace having a communication path for suction and air introduction to form an upper chamber, and the lower surface of this heating plate is A recess for heating and softening the upper film is formed by leaving a peripheral edge for sealing, and this recess is provided with a tapered side surface and a ceiling surface that is electrically connected to the communication path through a plurality of small holes, In addition, the entire upper chamber is rotatably or vertically movable with respect to the lower chamber, so that it can be opened and closed. It has a concave lower chamber main body that can be introduced freely, and a height-adjustable table for placing an article to be packaged inside the lower chamber main body.

The details of the invention will be explained below with reference to the illustrated embodiments. FIGS. 2 to 5C) show a first embodiment of the present invention. Vacuum packaging apparatus 20 shown in this first embodiment
The upper chamber 2 is rotatable via the hinge 21f.
2 and a lower chamber 24 on a pedestal 23. The upper chamber 22 is mainly formed of a pace 25 and a heating plate 26, and the pace 25 includes a communication passage 27 for suction and atmospheric introduction on its lower surface side, and is connected to a vacuum pump (not shown) via a flexible hose 28. ing. The heating plate 26 is combined with the lower surface side of this pace 25 and is integrated with the pace 25. The heating plate 2 mainly includes a recess 29, a peripheral edge 30 for sealing, and a heater 31.

The depression 29 has an e-shaped side surface 32 and a flat ceiling surface 33.
and is recessed in the lower surface of the heating plate 26. Numeral 34 is a small hole, one end of which is opened in the upper side of the heating plate 26, and the other end is opened in the ceiling surface 33 of the recess 29. The plurality of small holes 34 connect the recess 29 to the communication path 27. It is said to be in a connected state. The sealing peripheral portion 30 is provided on the lower surface of the heating plate 26 and surrounds the recess 29, and the sealing peripheral portion 30
It is equipped with The heater 31 is housed in the heating plate 26 and by energizing the heating plate 26, a tapered side surface 32 of the recess 29 and a flat ceiling surface 33 are formed in the entire heating plate 26.
This is done so that the upper film 36 made of synthetic resin, which will be described later, can be easily heated and softened. Note that 37 is a cover integrated, and 38 is a handle.

The lower chamber 24 includes a lower chamber main body 39 and a table 4.
Consists of 0. The lower chamber main body 39H1 has a lower peripheral edge 41 that can freely come into close contact with the peripheral edge 30, and is entirely concave. Then, connect the opening 42 with a vacuum pump (
(not shown) By connecting it to other devices, suction and atmospheric air can be freely introduced into the interior. It is for placing the packaged product 44 placed on the lower film 43 of the table 40i, is connected to and supported by the rod P side of the pneumatic cylinder 45, and is located inside the lower chamber main body 39 and can be moved up and down. It should be height adjustable.

In addition, 46 in the figure is a film holder that supports the roll-shaped upper film 36 and extends between the upper and lower chambers 22.2A with a length slightly longer than the length t between the upper and lower chambers 22.2A via a guide roll 47. The upper @ film 36 can be supplied freely.

Next, the action will be explained.

At the starting point, the table 4o is above the position shown in FIG. 3, and the upper chamber 22 is open via the hinge 21.

First, an underlayment film 43 is placed on an underlayment (not shown), and the product number 4 to be packaged is placed on top of the underlayment film 43, which is then set on the table 40. The lower film 43 is cut in advance to approximately correspond to the size of the butterfly table 40. Next, the packaged product 44
The table 40 is mounted on a pneumatic cylinder 45 so that its upper surface is at the same height as the lower peripheral edge 41 of the lower chamber body 39.
lower it through. At this point, grasp the end of the upper film 36 by hand and pull it to the left in FIGS. 2 to 4 to cover the lower chamber body 39. This upper film 3
Lower peripheral edge portion 4 corresponding to the peripheral edge of the 6Fi lower chamber body 39
1, and is fed from the film holder 46 via the guide roll 47 by winding the roll somewhat longer than the length L. and handle 3
8 to manually rotate the entire upper chamber 22 downward via the hinge 21. Then, the sealing peripheral edge 30 provided on the lower surface and the lower peripheral edge 41 come into close contact with each other, and the upper stretched film 36 is held between the upper and lower chambers 22.
．． The inside of 24 is made airtight. At this time, the seal 35 provided on the peripheral edge 30 functions to achieve even more reliable airtightness. Next, the inside of the upper chamber 22 is evacuated. That is, a vacuum pump (not shown) is operated to open the communication passage 27 and the large number of small holes 34.
If the inside of the recess 29 is vacuum-suctioned through the upper film 3
6 is in a state where the pressure difference 32 in both the upper and lower chambers 22 and 24 and the flat ceiling surface 33)tc are followed. At this time, meter 3
1 is energized and the heating plate 26, that is, the entire depression 29 is heated to an appropriate temperature, so the upper film 36 placed along the depression 29 is immediately heated and softened. Note that the upper film 36 and the e-shaped circumferential surface 32 form a smooth surface K111 along the entire surface 29. Then, when setting the upper film 3
Even if there are "wrinkles" left on 6, they will be absorbed.

Then, the inside of the lower chamber main body 39 is evacuated with a slight delay in time.

Furthermore, after waiting for the degree of vacuum in both the upper and lower chambers 22 and 24 to be reached and for the upper film 22 to be heated and softened appropriately, the table 40 is raised to fH, and the upper surface of the packaged product 44 is heated and softened along the depression 29. the lower surface of the upper film 36.

When the atmosphere is introduced into the upper chamber 22, the heated flexible article 44
While being stretched, it comes into contact with and closely adheres to the upper surface +4a and the side surface 44bK, and at the same time adheres and seals the exposed portion of the lower film 43. [Figure 5 (a)]
.

Next, if the atmosphere is introduced into the lower chamber main body 39 with a slight delay, the packaging will be completed. Finally, the upper chamber 22 is rotated upward in the opposite direction to open it and remove the vacuum-packed items. Above all,
The upper film 36 is fused to length t when the upper and lower chambers 22,24 are closed.

If the height of the packaged product 44 is still close to the initially set height,
The height position of the table 40 is adjusted so that the upper surface 44g of the packaged product 44 approaches the lower surface of the upper film 36 which has been softened by heating as shown in FIG. When the height is lower than the set height, the height of the table 40 can be lowered a little as shown in Fig. 5 (p) and adjusted to the lower position by a distance d corresponding to the depth d of the recess 29! time, the depth dIK of the upper film 36
The commensurate growth is distance d! It is fully absorbed and the so-called "wrinkles"
This can be done to ensure that no residue remains.

FIG. 6 shows an M2 embodiment of the invention. This second embodiment is similar to the first embodiment except that the upper chamber 5o is vertically movable via a guide ball 51 to open and close with the lower chamber 52. Since the contents are substantially the same as those in Example I, common parts in the drawings are indicated by common reference numerals, and redundant explanation will be omitted.

FIG. 7 shows a third embodiment of the invention. In both the first and second embodiments, the upper chambers 22, 50 were provided with one recess 29, but in this third embodiment, the upper chamber 5
3Kf13 depressions 54 are provided. These depressions 5
4 is provided with a tapered side surface 32 and a flat ceiling surface 33 as in the previous embodiment, but it is also possible to adopt the side surface 32 and ceiling surface 33 according to the size and shape of the packaged product 44. good. Since this embodiment is substantially similar to the embodiment of the other company's optical system in which a plurality of depressions 54 are provided, the same parts are indicated by the same reference numerals in the drawings, and redundant explanation will be omitted.

Since the vacuum packaging apparatus according to the present invention has the content described above, there is no need for a heating plate that descends and rises inside the upper chamber, and the wiring part of the heater can be brought outside the upper chamber, reducing the volume of the entire upper chamber. The structure of the finishing chamber can be simplified because it does not require a device to drive the heating plate, and the time for lowering and raising the heating plate can be omitted.Moreover, by reducing the volume, the amount of air to be vacuumed can be reduced accordingly. This has the advantage of reducing vacuum packaging and making it easier to vacuum. Overall, this has the effect of shortening the vacuum packaging processing time. Furthermore, in addition to these effects, a recess is formed in the heating plate of the upper chamber, a table is arranged inside the lower chamber body which is entirely concave, and the height position of the table can be adjusted with respect to the recess. It is possible to sufficiently vacuum package products of various sizes, including products that are relatively tall considering the depth of the container, thereby increasing versatility.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing a conventional example of a light vacuum packaging device; Fig. 2 is an overall side view showing an embodiment of the present invention; Fig. 3 is a diagram showing a state in which the upper chamber is rotated and opened. Figure 4: Cutout side view of the main part, Figure 4: Cutout side view of the main part showing the state where the upper chamber is rotated and closed, Figure 5 (A), C opening) is the height position of the table relative to the recess. 6 is a schematic cross-sectional view showing the adjusted state of the invention, FIG. 6 is a cutaway side view of main parts showing another embodiment of the invention, and FIG. 7 is a sectional view of the upper chamber showing still another embodiment of the invention. be. 1.22, 50, 53°...° Upper chamber 2.24
．． 52...Downstream chamber 4.26...
・・・・・・・・・・・・・・・Heating plate 4m, 31
River・・・・・・・・・・・・Heater 6.40
・・・River・・・・・・・・・Table 7.43
・・・・・・・・・・・・・・・・・・Lower film 8.44 ・・・・・・・・・・・・・・・・・・Product to be packaged 9.36 ・・・・・・・・・・・・・・Nakagami 117 (Rum 21 ・・・・・・・・・Self・・・・・・・)
・・・・・・Hinge 29.54 ・・・・・・・・・
...... Depression 39, -0. -----11.6.
, , , , , -, - Lower Champa body 111 Figure 12m1 Figure 3 Figure 4 Figure 15 Figure 6 Figure 7 Procedural amendment (self-motivated) February 15, 1982 Threatening Agency Director Haruki Tomi Shimada 1 , Indication of the case 1981 Patent application gzazt No. 2 Name of the invention Vacuum envelope iI & device λ correction Sound neck case Relationship to the case Name of applicant Name 1Frall Iron Works Co., Ltd. 4, Agent
Person 〒1t15 1jli Specification "Invention Ops Explanation" Barrel 6, @ Positive contents (υ Specification No. 9 member 5g 7th line [Meter 31J stop 7. Correct as "Hee! 31".,, 7" i, ,,'
,,,effectf Q 1 1゜,ha,L,ll

Claims (1)

[Claims] A heating plate with a built-in heater is integrated with the lower surface of the pace having a communication path for suction and atmospheric introduction to form an upper chamber, and a peripheral edge for sealing is left on the lower surface of the heating plate. A recess for heating and softening the upper film is formed, and this recess is provided with a tenose-shaped side surface and a ceiling surface that is electrically connected to the communication path through a plurality of small holes, and the entire upper chamber is connected to the lower chamber. The lower chamber has a concave lower chamber which has a lower periphery that can be brought into contact with and sealed with the periphery and can freely introduce suction and air into the interior. 1. A vacuum packaging device comprising a main body and a lower chamber main body provided with a height-adjustable table for placing an article to be packaged.