JP2001130511A - Vacuum packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum packaging device. SOLUTION: When an independent seal machine 40 is set on a surface plate 20 installed at a lower box 11 and an upper box 13 is placed to cover the lower box 11 to form a vacuum chamber, a packcaged item can be vacuum packaged within a packaging bag. That is, a batch type vacuum packaging machine can be formed. The packaged item placed on a lower film is mounted on the surface plate under a state in which the seal machine 40 is removed from a chamber while being different from the foregoing, and at the same time, an upper film is held between the upper box and the lower box, air in the chamber is sucked while the upper film is being heated and softened by a heater plate 35, thereafter the packaged item is held with atmospheric pressure acting to the chamber to melt and adhere the upper and lower films, resulting in that the packaged item can be vacuum packaged between the two films. In other words, this is a skin packaging. When the seal machine 40 is set to the surface plate 20, a knock pin 47 may act against a switch 54, resulting in that a valve 23 for operating a cylinder 21 is changed over and additionally a valve 59 for operating a seal bar at the seal machine 40 is changed over, thereby both skin packaging machine and the batch packaging machine can be operated together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging apparatus in which a skin packaging machine for vacuum-packaging an object to be packaged between two upper and lower films can be used as a batch-type packaging machine for vacuum-packaging an object to be packaged in a bag. About.

[0002]

As disclosed in, for example, Japanese Patent Application Laid-Open No. 56-151629, a skin wrapping machine arranges an object to be wrapped on a lower film in a lower box of a top opening type. While heating the upper film with the hot plate in the upper box to cover the lower box and removing the air in the pressure-resistant chamber formed by the two boxes by suction, the atmospheric pressure is applied to the upper surface of the upper film and This is a configuration in which an object to be packaged is vacuum-packed between sheets of film. On the other hand, as disclosed in, for example, Japanese Utility Model Laid-Open No. 4-27767, a batch-type packaging machine arranges a bag containing an article to be packaged in a pressure-resistant chamber, and then removes air in the chamber by suction.
With a configuration in which the opening edge of the bag is heat-sealed by being squeezed by a seal bar, these two packaging machines differ in the shape of the packaging material,
The configuration of the sealing device is fundamentally different. Therefore, it is not possible to carry out the above-mentioned packing operation with any one of the packing machines. However, if it becomes possible, the economic effect will be great for micro, small and medium-sized users.

[0003]

According to the present invention, for the purpose of obtaining the above-mentioned economic effects, a lower box having an upper surface opening type in which a surface plate for mounting a lower film is provided, and a hot plate for heating the upper film are provided. A pressure-resistant chamber is formed by a lower-opening upper box provided inside, and a skin packaging machine configured by connecting vacuum control means to the pressure-resistant chamber, and a movable seal bar on a pedestal via an airbag. A sealing machine formed by disposing a fixed seal bar above the movable seal bar while being fixed to the pedestal, wherein the sealing machine is detachably engaged with the surface plate. Stopping means,
A detachable ventilation pipe having one end connected to the airbag and the other end connected to a vacuum port on the inner surface of the lower box, and a detachable connector for connecting a heater of at least one seal bar to a terminal installed in the lower box. It comprises a flexible cable, operating means for opening a normally closed on-off valve in a vacuum line connected to the vacuum port by an engagement pressure of the sealing machine with respect to the surface plate, and an atmosphere release valve interposed in the vacuum line. .

Normally, after packages are arranged on a lower film on a surface plate, the upper film pulled out of the package is sandwiched between a lower box having an upper opening and an upper box having a lower opening. At the same time, while the upper film is heated and softened with a hot plate, the inside of the pressure-resistant chamber is changed from the vacuum environment to atmospheric pressure again by the vacuum control means to change the thermoplastic structure of the upper film to the thermoplastic structure of the lower film. Functions as a skin wrapping machine for welding to On the other hand, a sealing machine that supports the movable seal bar on the pedestal via an airbag and arranges a fixed seal bar above the movable seal bar in a state of being fixed to the pedestal is provided with locking means When the air bag and the vacuum port on the inner surface of the lower box are connected to each other by a ventilation pipe while being engaged on the surface plate, the normally-closed on-off valve in the vacuum line is activated by the engagement pressure of the sealing machine on the surface plate. When opened, the sealing machine becomes operable by vacuum pressure and switches to a batch packaging machine.

[0005]

The embodiment shown in FIG. 2 illustrates the relationship between a lower box 11 fixed to the upper surface of a main body 10 and an upper box 13 connected to the main body via a swingable parallel link 12. The airtight pressure-resistant chamber is constructed by placing the upper box 13 on the lower box 11. As shown in FIG. 3, between the brackets 25 on both sides protruding from the lower box 11,
A shaft 27 for rotatably supporting the roll film 26, an idle bar roll 28, a rotary bar 29 for holding the film on the bar roll are provided, and a heating wire 30 for fusing the film is provided at the edge of the lower box.

In FIG. 2, a main valve 16 is interposed in a hose 15 connecting the vacuum pump 14 and the upper box 13 inside the main body, and as shown in FIG. Formed by the one-way switching valve 16 and the lower box 11
When the switch 17 is closed by the pressure applied to the upper box 13 and the switch 17 is closed, the valve 16 opens the vacuum line to the pressure-resistant chamber. Close the vacuum line as in the condition of.

In FIG. 1, a platen 20 provided in the lower box 11 is connected to a piston rod 22 of an air cylinder 21 on the lower surface of the lower box.
And a two-position, four-port solenoid valve 23
The platen 20 is normally held at the lowered position by its own weight. Therefore, as shown in FIG. 2, the packaged object 32 placed on the lower film 31 is placed on the surface plate 20, while the upper film 26 is pulled out onto the lower box 11, and the upper box 13 is placed on the lower box 11. , Switch 1 in FIG.
By closing 7, the valve 16 of the vacuum line is switched, and the air in the pressure-resistant chamber is sucked by the pump 14. In this case, the bypass port 33 of the lower box 11 shown in FIG. 3 is connected to the hole 34 of the upper box 13 as shown in FIG. 4, and simultaneously sucks the air in the lower box. Moreover, the upper film 26 is pressed against the hot plate 35 in the upper box 13 and softened by heating due to the air resistance in the bypass port 33.
After that, the valve 16 in FIG. 1 is switched by the timer 18, and the atmospheric pressure acts in the pressure-resistant chamber by the action, so that the upper and lower films 26, 31 are welded through the package 32 as shown in FIG. So-called skin packaging.

As shown in FIGS. 3 and 5, two poles 37 are provided on both sides of the platen 20, respectively. When the heating temperature of the upper film 26 reaches an appropriate temperature during the skin packaging process, the valve 23 in FIG. 1 is switched by the timer 38, and the platen 20 is pushed up by the vacuum pressure acting on the upper chamber of the cylinder 21. In this case, the pole 37 is moved along the guide 39 hanging from the ceiling surface of the upper box 13 along with the hot plate 35.
To bring the packaged object into contact with the upper film 26.

A sealing machine 40 shown in the air as shown in FIG.
FIG. 3 is an imaginary view of a process of switching a skin wrapping machine to a batch wrapping machine. That is, as shown in FIGS. 7 and 8, in the sealing machine 40, a flexible bag or airbag 42 is arranged on a lower pedestal 41, and a movable seal bar 43 is provided thereon, A seal bar 45 on the other side is fixed to the upper end of a column member 44 erected at both ends of the pedestal 41, and two insertion pins 46 and knock pins 47 are provided on the lower surface of the pedestal. Also, as shown in FIG. 9, the inclined plate 48 for laying the packaging bag 50 on the base 41 is engaged with the pedestal 41, and both ends of the fixed sealing bar 45 are rotatably supported at both ends of the bag holding bar 49.

Two holes 51 on both sides of the platen 20 shown in FIG.
Is a means for locking the sealing machine 40 represented by an imaginary line. The two pins 46 on both sides of the pedestal in FIG. 7 are inserted into the holes 51 in FIG. 3 to set the sealing machine. In the drawing, the setting position of the sealing machine can be arbitrarily changed because two upper and lower stages are provided in parallel.

FIG. 10 shows a state in which the sealing machine 40 is attached to the surface plate 20. At this time, a nozzle 56 at the other end of a passage 55 is formed in the base 41 and has one end connected to the airbag 42.
Faces the insertion port 57 installed on the inner surface of the lower box 11. When the nozzle 56 and the insertion port 57 are connected to each other using a ventilation tube (not shown) such as a rubber tube, the airbag 42 is connected to the vacuum line 58 in FIG. When locking, dowel pin 4
7 penetrates the hole 52 and contacts the switch 54 through the slide pin 53, so that the normally closed on-off valve 59
Is opened, and at the same time, the heater power supply in the heating plate 35 in the upper box 13 is cut off. On the other hand, as shown in FIG.
Since terminals 59 are installed at different cross-sectional positions, the detachable cable 60 is used, and the heater wire of the movable seal bar 43 in the sealing machine 40 is connected to a power source, so that the function as a batch packaging machine is achieved. Be maintained.

Therefore, as shown in FIG. 1, the bag 50 containing the article to be packaged is set on the sealing machine 40, and the upper box 13 is connected to the lower box 11.
When the switch 17 is closed, the valve 16 is switched by closing the switch 17, and a vacuum acts in the pressure-resistant chamber. At the same time, the air release valve 61 of the vacuum line 58 is closed to suck the air in the airbag 42. When the adjustment time of the timer 63 is reached, the atmospheric pressure acts on the airbag 42 by opening the valve 61, and the mouth of the bag pinched by the upper and lower seal bars is sealed by receiving a heat seal, as shown in FIG. The article to be packaged can be vacuum packaged in the bag 50. In this case, when the sealing machine is mounted on the surface plate, the knock pin 47
4, the electric circuit for operating the cylinder operating valve 23 is cut in advance, so that the platen 20 does not move up and down.

The normally closed on-off valve 59 provided on the vacuum line 58 in FIG. 1 is of an electromagnetic switching type. However, as a separate embodiment, it is possible to use a structure in which the valve is configured to be a mechanical switching type and the valve is directly switched by the pressing force of the knock pin 47 of the sealing machine 40.

[Brief description of the drawings]

FIG. 1 is a front sectional view of the apparatus.

FIG. 2 is a side view of the previous figure.

FIG. 3 is a plan view taken along line III-III in the preceding figure.

FIG. 4 is a partial sectional view of the preceding figure.

FIG. 5 is a partial sectional view of FIG. 3;

FIG. 6 is an explanatory view of a packaged product.

FIG. 7 is a front view of the sealing machine.

FIG. 8 is a side view of the sealing machine.

FIG. 9 is a plan view of a sealing machine.

FIG. 10 is a partial sectional view of a lower box.

FIG. 11 is a partial sectional view of a lower box.

FIG. 12 is an explanatory view of a packaged product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Lower box 13 ... Upper box 14 ... Vacuum pump 16 ... Vacuum control means-main valve 20 ... Surface plate 26 ... Upper film 31 ... Lower film 32 ... Packaged object 35 ... Hot plate 40 ... Sealing machine 41 ... Base 42 ... Air bag 43 ... Movable seal bar 45 ... Fixed seal bar 46 ... Engaging means-insertion pin 47 ... Knock pin 50 ... Bag 51 ... Engaging means-hole 56 ... Nozzle 57 ... Connection port 59 ... Terminal 60 ... Cable

Claims (7)

[Claims] A pressure-resistant chamber is formed by an upper surface-opening lower box in which a surface plate for mounting a lower film is provided, and a lower surface-opening type upper box in which a heating plate for heating the upper film is provided. A skin packaging machine formed by connecting vacuum control means to the pressure-resistant chamber; and a movable seal bar supported on the pedestal via an airbag and fixed to the pedestal. A sealing machine formed by arranging a fixed seal bar in an upper region, a locking means for detachably engaging the sealing machine with the surface plate, and one end of the airbag with the inner surface of the lower box. A detachable ventilation pipe that can connect the other end to the vacuum port of
A detachable cable for connecting a heater of at least one side of a seal bar to a terminal installed in the lower box, and a normally closed opening and closing in a vacuum line connected to the vacuum port by an engagement pressure of the sealing machine with respect to the surface plate. An apparatus comprising operating means for opening a valve and an atmosphere opening valve provided on the vacuum line. 2. A locking means for detachably engaging a sealing machine with a surface plate includes a plurality of holes formed in an upper surface of the surface plate, and a pedestal on a lower side of the sealing machine for insertion into the holes. The device of claim 1, comprising a plurality of depending insertion pins. 3. The apparatus according to claim 2, wherein holes of a platen for inserting a plurality of insertion pins hanging from a base on a lower side of the sealing machine are formed in a plurality of parallel stages. 4. An operating means for opening a normally closed on / off valve of a vacuum line connected to a vacuum port by an engagement pressure of a sealing machine with respect to a surface plate, wherein the on / off valve opening / closing structure is formed in a mechanical form and the seal is provided. The apparatus according to claim 1, wherein the mechanical on-off valve is switched by pressing a knock pin protruding below the pedestal of the machine. 5. An operating means for opening a normally closed on-off valve of a vacuum line connected to a vacuum port by an engagement pressure of a sealing machine with respect to a surface plate, wherein the on-off structure of the on-off valve is formed in an electromagnetic switching type. 2. The device according to claim 1, wherein a knock pin protruding below the pedestal of the sealing machine touches an electric switch connected to an electromagnetic part of the solenoid on-off valve. 6. The apparatus according to claim 1, further comprising means for cutting off a power supply of the hot plate when setting the sealing machine on the surface plate. 7. The apparatus according to claim 6, wherein the means for powering down the hotplate is associated with a touch action of an electric switch by a dowel pin projecting below the pedestal of the sealing machine.