JPH0644803Y2 - Vacuum packaging equipment - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a vacuum packaging device for reducing and packaging items such as bedding, apparel products, clothes, etc. in a packaging bag made of resin film, More specifically, the present invention relates to a vacuum packaging device that seals an opening of a packaging bag after the inside of a pressure-resistant container having a packaging bag containing the article to be packaged therein is made negative pressure, and in particular, the packaging bag accommodated in the packaging bag is packaged. The present invention relates to a structure for pressing an object in the pressure vessel in the thickness direction.

(Prior Art) An example of a conventional vacuum packaging device will be described with reference to FIG.

The pressure-resistant container 1 includes a lower container body 2 having an open upper surface, and an upper container body 3 for opening and closing the upper surface opening of the lower container body 2.
It consists of An air supply / exhaust port 4 is formed in the lower container body 2, and the air supply / exhaust port 4 is connected via a hose 5 to a deaerator, for example, a vacuum pump (not shown). Then, in the pressure-resistant container 1, a packaging bag 8 accommodating an article 7 to be packaged such as a blanket is placed and accommodated via a placing table 6 having an appropriate thickness. Further, on the right side of the pressure-resistant container 1 in the drawing, a sealing device 9 for heating and sealing the opening 8a of the packaging bag 8 is provided. The sealing device 9 includes a heating wire 13 fixed to a vertically moving shaft 11 of a cylinder device 10 fixed to the lower container body 2 via a heating wire fixing tool 12 and a receiving body fixing tool to the upper container body 3. The opening 8a of the packaging bag 8 is sandwiched between the heat ray receiving member 15 made of rubber and fixed via 14.

Then, the vacuum packaging method using the above vacuum packaging device,
With the upper container body 3 open, the packaging bag 8 containing the article 7 to be packaged is mounted in the lower container body 2 and then the upper container body 3 is joined to the lower container body 2 (mounting step). The inside of the pressure-resistant container 1 is depressurized by a vacuum pump to deaerate the inside of the packaging bag 8 (deaerating step), and then the opening 8a of the packaging bag 8 is sealed by the sealing device 9 (sealing step). ), Then, the inside of the pressure resistant container 1 is returned to atmospheric pressure (vacuum breaking step), and the packaging is completed.

By the way, in the deaeration step, if the pressure inside the pressure-resistant container 1 is negatively pressured, the inside of the packaging bag 8 is also negatively pressured, but deaeration is performed from the narrow opening 8a of the packaging bag 8. As a result, there is a time difference between the negative pressure inside the pressure-resistant container 1 and the negative pressure inside the packaging bag 8. However, since the packaging bag 8 is only placed on the stand 6, the packaging bag 8 is subjected to a negative pressure in the pressure resistant container 1 until the inside of the packaging bag 8 and the pressure resistant container 1 are saturated.
Phenomenon occurs. Then, this phenomenon causes wrinkles in the packaging bag 8 and disorder of the shape of the object to be packaged 7, and causes a shift in the opening 8a of the packaging bag 8 located in the sealing device 9. If the opening 8a is sealed in this state, wrinkles may occur in the sealing portion, or the opening 8a
In some cases, a defect may occur in which the whole is not completely sealed.

In the vacuum breaking step, the pressure-resistant container 1 is returned to the atmospheric pressure state, but the packaging bag 8 is in a negative pressure state, so that the packaging bag 8 rapidly contracts and contracts. When the article 7 to be packaged is a flexible article such as clothing or blanket, shrinkage or adhesion causes wrinkles, changes in shape, and irregularity.
The commercial value is lost.

Therefore, conventionally, a method of preventing shrinkage deformation by disposing a gas filling device in a pressure resistant container, injecting an inert gas into the packaging bag, and bringing the inside of the packaging bag under negative pressure into an atmospheric pressure state, is prevented. However, in this method, since the gas is enclosed, the cost is increased, the time required for the packaging work is increased, and the effect of reducing the volume of the packaged object cannot be obtained.

In addition, as described in Japanese Utility Model Laid-Open No. 61-123005, a pressure plate is arranged in a pressure resistant container through a flexible body to partition and form an air action chamber and a package storage chamber, A vacuum packaging device has been proposed in which an air working chamber is connected to the atmosphere via a valve. In this device, during the degassing process, even if the pressure inside the object-to-be-packaged chamber is made negative, the pressure plate presses the object-to-be-packaged in the thickness direction by keeping the air action chamber at atmospheric pressure, The expansion and deformation of the packaging bag are prevented, the shape of the object to be packaged is adjusted, and the air action chamber is kept at atmospheric pressure even during the vacuum breaking process in which the atmosphere is introduced into the chamber for containing the object to be packaged. As a result, the pressure plate presses the article to be packaged, so that the occurrence of wrinkles and the disorder of the shape due to the contraction deformation of the packaging bag and the article to be packaged are prevented.

However, in the device described in the above publication, the pressure applied to the pressure plate is determined by the difference between the pressure in the air action chamber and the pressure in the packaged object storage chamber, so that the pressure is applied especially in the first half of the deaeration process and the second half of the vacuum breaking process. The pressure is insufficient, and it is not possible to sufficiently prevent the generation of wrinkles in the packaging bag and the disorder of the shape of the packaged object. Especially during the vacuum breaking process, the pressure plate cannot follow the speed of atmospheric pressure and the extreme shrinkage of the packaging bag and the package. Further, it is difficult to maintain the airtightness between the air action chamber and the object-to-be-packaged storage chamber, but if the airtightness is not sufficient, the pressing force of the pressure plate becomes further insufficient.

(Problems to be Solved by the Invention) As described above, in the conventional vacuum packaging method and apparatus in which the object to be packaged is not pressed in a certain direction, the packaging bag is wrinkled during the deaeration process and the vacuum breaking process, There is a problem that the shape of the object to be packaged is disturbed, and a pressure plate is arranged in the pressure resistant container to partition and form the air action chamber and the object to be packaged chamber, and the thickness of the object to be packaged by the pressure plate. Even in a vacuum packaging device that presses in one direction, the pressure plate operates due to the pressure difference between the air action chamber and the packaged object storage chamber, so the pressure force of the pressure plate is insufficient and wrinkles or shape irregularities are sufficiently prevented. There was a problem I couldn't do.

The present invention is intended to solve the above problems, and reliably prevents the occurrence of wrinkles and the disorder of the shape of the packaging bag and the packaged article regardless of the thickness and the configuration of the packaged article. It is an object of the present invention to provide a vacuum packaging device capable of performing the above.

[Constitution of device]

(Means for Solving Problems) A vacuum packaging device according to the present invention comprises a pair of container bodies in which a packaging bag accommodating an article to be packaged, such as bedding, is attached and detachably joined. A pressure-resistant container, a deaeration device connected to the air supply / exhaust port of the pressure-resistant container for depressurizing the inside of the pressure-resistant container to deaerate the inside of the packaging bag, and an opening of the packaging bag provided in the pressure-resistant container. And a movable pressure plate that presses the object to be packaged stored in the packaging bag in the thickness direction inside the pressure-resistant container. A pressure cylinder device, which operates independently of the pressure inside the pressure vessel and is operated by air pressure and is connected to the pressure plate and drives the pressure plate, is provided outside one container body. The container body is opposed to the pressure plate, and the package is formed by the pressure plate. A pressure receiving plate sandwiching an object to be packaged contained in a bag is supported by a plurality of springs.

(Operation) In the vacuum packaging device of the present invention, in the mounting step, a packaging bag accommodating an article to be packaged such as bedding is mounted in, for example, one container body of a pressure resistant container, and one container body and the other container body are joined. Then, in the deaeration process, the deaeration device is driven to reduce the pressure inside the pressure-resistant container to deaerate the inside of the packaging bag, and then in the sealing process, the sealing device is driven to form the packaging bag. The opening of the is sealed, and then the pressure inside the pressure-resistant container is brought to atmospheric pressure in the vacuum breaking process.
By driving a pressure cylinder device provided in one container body and operated independently of the pressure in the pressure container and by pneumatic pressure, a pressure plate connected to this pressure cylinder device and a plurality of springs in the other container body are driven. By pressing in the thickness direction by sandwiching the object to be packaged contained in the packaging bag with the pressure receiving plate supported by, the degassing in the packaging bag is promoted in the degassing step, and the packaging bag is expanded. To prevent wrinkles and shifts in the opening of this packaging bag,
Compress the packaged object in the thickness direction to adjust its shape, and
In the vacuum breaking step, generation of wrinkles and disorder in shape of the packaging bag and the packaged article due to shrinkage deformation of the packaging bag and the packaged article are prevented. At this time, since the pressure receiving plate is supported by the plurality of springs as described above, even if the stroke of the pressure plate is constant, it does not depend on the thickness of the packaged object and the thickness of the packaged object. Is different in front, back, left and right, and further, even if the object to be packaged contracts during the vacuum breaking step, the object to be packaged is pressed with an appropriate force. Further, when the binding force between both container bodies is weakened due to the increase in atmospheric pressure in the pressure-resistant container, the spring supporting the pressure receiving plate absorbs the shock generated by the pressing of the pressure plate.

(Embodiment) The construction of one embodiment of the vacuum packaging apparatus of the present invention will be described below with reference to FIGS. 1 to 4.

Reference numeral 21 denotes a pressure-resistant container. The pressure-resistant container 21 has a lower container body 22 formed and fixed in a box shape having an open upper surface, and a flat plate-shaped container which is detachably mounted on the upper surface opening of the lower container body 22. The upper container body that is closed to open and close this upper opening
A seal packing 24, which is in air-tight contact with the upper surface peripheral portion of the lower container body 22, is fixed to the lower surface peripheral portion of the upper container body 23. A supply / exhaust port 25 is formed on the rear side (right side in the figure) of the lower surface of the lower container body 22, and a hose 26 is connected to the supply / exhaust port 25. Although not shown, the other end of the hose 26 is connected to, for example, a vacuum pump as a deaerator via a switching electromagnetic valve.

Further, a plurality of pressure cylinder devices 31 are provided, for example, in the front, rear, left and right outside the lower container body 22 outside. Next, the pressure cylinder device 31 will be described.

A cylinder body 32 is fixedly coupled to the lower surface of the lower container body 22, and the lower container body 22 and the cylinder body 32 are joined together.
The airtightness of the joint portion with and is maintained by the joint portion O-ring 33. Further, the cylinder bottom plate 34 fixed to the lower surface opening of the cylinder body 32 has a flow port 35 formed therein. A piston 36 is vertically slidably fitted in the cylinder body 32, and the piston 36 is constantly urged downward by a cylinder spring 37. The piston O-ring 38 fixed to the outer peripheral surface of the piston 36.
Is airtightly and slidably pressed against the inner peripheral surface of the cylinder body 32. A cylinder shaft 39 fixed to the piston 36 penetrates the lower surface of the lower container body 22 in a vertically slidable manner and projects into the lower container body 22. The seal O-ring 40, which is in pressure contact with the lower container body 22 and the cylinder body 32 and slidably in contact with the cylinder shaft 39, ensures the airtightness between the lower container body 22 and the cylinder body 32. Is held.

Further, a cylinder control switching solenoid valve 46 communicates with a connection port 41 formed in the cylinder body 32 above the sliding range of the piston 36 via pressure resistant joints 42, 43 and connection pipes 44, 45. It is connected. The switching solenoid valve 46 is a three-way switching valve, and switches and connects the connection port 41 to either the negative pressure side opening or the atmospheric pressure side opening. The negative pressure side opening is connected to the vacuum pump so that the atmospheric pressure side opening is open to the atmosphere.

Further, bosses 51 are fitted from above into the cylinder shafts 39 of the respective pressurizing cylinder devices 31 located inside the lower container body 22, and one plate-like member is mounted on these boss bodies 51. The pressure plate supporting rigid body 52 is horizontally fixed. Then, a support metal fitting 53 erected at the center of the support rigid body 52.
A bearing metal fitting 56, which is vertically provided at the center of a pressure plate 55, is rotatably supported by a horizontal support shaft 54 supported by. That is, the pressure plate 55 is supported so as to be vertically swingable about the support shaft 54 as a fulcrum. On the other hand, a pressure receiving plate 58 facing the pressure plate 55 is supported on the lower surface of the upper container body 23 through a plurality of pressure receiving springs 57.

A sealing device is provided on the front side (left side in the drawing) of the pressure-resistant container 21.
61 is provided. Next, the sealing device 61 will be described.

The cylinder body 63 of the heat ray actuated cylinder device 62 is fixed to the front side of the lower surface of the lower container body 22. The heat ray operating cylinder device 62 has the same structure as the pressurizing cylinder device 31, and via another switching solenoid valve (not shown) that operates independently of the switching solenoid valve 46,
It is connected to a vacuum pump. A heat wire fixture 65 is fitted from above onto a vertically movable cylinder shaft 64 protruding into the lower container body 22 of the heat wire operation cylinder device 62, and a heat wire 66 is mounted on the heat wire fixture 65. It is fixed. On the other hand, on the lower surface front side of the upper container body 23,
A heat wire receiver 68 made of silicon rubber is fixed via a receiver fixture 67 to the heat wire 66 from above so that the heat wire 66 comes into contact with and separates from the heat wire 66.

Further, in the lower container body 22, an opening holding device 71 is provided near the front of the sealing device 61. Next, the opening holding device 71 will be described.

A fixing bracket 72 having a substantially U-shaped side surface is fixed to the bottom surface of the lower container body 22, and a rail groove 73 extending in the left-right direction is formed on the upper surface of the fixing bracket 72. A pair of left and right first sliders 74 are slidably supported in the rail grooves 73, and the first sliders 74 can be fixed to arbitrary positions in the rail grooves 73 by screws 75. There is. In addition, in the rail groove 73, a pair of left and right second sliders are located between the first sliders 74.
Sliders 76 are supported so that they can slide left and right,
On these second sliders 76, insertion pins 77 each having a substantially inverted L-shaped side surface and having a front end protruding rearward are provided in a protruding manner. A bag tension spring 78 is stretched between the adjacent first slider 74 and second slider 76.

Next, a vacuum packaging method using the above vacuum packaging device will be described.

The first step is a mounting step in which a packaging bag 82 containing a packaged object 81 such as a folded blanket is mounted in the pressure resistant container 21. The packaging bag 82 is formed of a heat-welding material such as a polyethylene resin film.

In the mounting step, with the upper container body 23 opened, the object to be packaged 81 is put into the packaging bag 82 through its opening 82a, the object to be packaged 81 is placed on the pressure plate 55, and the opening of the packaging bag 82 is placed. The 82a is placed on the heating wire 13, and the pair of left and right insertion pins 77 of the opening holding device 71 is inserted into both sides of the opening 82a of the packaging bag 82. In addition, when the bag tension spring 78 has a natural length, the distance between both insertion pins 77 is 5 mm or less than the length of the opening 82a of the packaging bag 82.
Slide both first sliders 74 to a position where they become larger by about cm, and tighten screws 75 to fix them. Therefore, both insertion pins 77
In the state that the
The openings 82a of the packaging bag 82 are urged by the 78 in the respective separating directions and are stretched by applying tension in the left-right direction, so that the opening is opened by a width equal to the diameter of the insertion pin 77 and held in a wrinkle-free state. It

Since the second slider 76 provided with the insertion pin 77 and the first slider 74 having the bag tension spring 78 stretched between the second slider 76 and the second slider 76 are respectively slidable, the packaging bag 82 can be inserted into the insertion pin 77. The opening 82a can be easily attached, and by attaching the opening 82a to the insertion pin 77 in this manner, even if the shape of the object to be packaged 81 is complicated, the opening 82a can be easily attached to the heating wire 66. I can do it. Further, by adjusting the position of the first slider 74 and adjusting the movable range of the insertion pin 77 of the second slider 76, the movement of which is suppressed by the bag tension spring 78, it is possible to reduce the size of the packaging bag 82. Can be easily dealt with, and the urging force of the bag tension spring 78 can be moderate.

Then, the upper container body 23 is placed on the lower container body 22. In this state, the vacuum chamber 21a is formed in the pressure-resistant container 21 composed of both container bodies 22 and 23.

In the mounting process, the connection port 41 of the pressurizing cylinder device 31 is kept in communication with the atmosphere by the switching solenoid valve 46. In this state, as shown in FIG. 1, the piston 36 and the cylinder shaft 39 are located below due to the urging force of the cylinder spring 37, and therefore, the pressure plate 55.
Is also located below.

Next, a deaeration process is performed.

In the deaeration process, the vacuum pump is driven to exhaust air from the air supply / exhaust port 25, the inside of the vacuum chamber 21a is made negative pressure, and the inside of the packaging bag 82 is deaerated. And the vacuum chamber 21
The connection between the upper container body 23 and the lower container body 22 becomes stronger as the negative pressure in the a is reduced. Further, as described above, since the opening 82a of the packaging bag 82 is held in the opened state by the opening holding device 71, air smoothly flows out from the inside of the packaging bag 82.

Further, in the initial stage of the deaeration process, the switching solenoid valve 46 is operated to connect the connection port 41 of the pressurizing cylinder device 31 to the vacuum pump. Then, the space above the piston 36 in the cylinder body 32 rapidly approaches a vacuum state, and as shown in FIG. 2, the piston 36 and the cylinder shaft 39
Is pushed up by atmospheric pressure. Further, the support rigid body 52 is lifted by each shaft 39 of the plurality of pressure cylinder devices 31, and the pressure plate 55 connected to the central portion of the support rigid body 52 by the support shaft 54 is lifted. The thickness (height) of the pressure plate 55 and the pressure receiving plate 58 supported via the pressure receiving spring 57 sandwiching the object 81 to be packaged contained in the packaging bag 82.
Press in the direction. As a result, deaeration in the packaging bag 82 is promoted, expansion deformation of the packaging bag 82 is prevented, and wrinkles are prevented from occurring in the packaging bag 82. Further, the object to be packaged 81 is compressed in the thickness direction and its shape is adjusted.

Moreover, since the pressure plate 55 is driven by the pressure cylinder device 31 that operates independently of the pressure in the vacuum chamber 21a, it is possible to press the object to be packaged 81 with sufficient force from the initial stage of the degassing step. Therefore, the generation of wrinkles and the disorder of the shape are surely prevented.

Further, since the pressure receiving plate 58 sandwiching the package 81 with the pressure plate 55 is supported by the plurality of springs 57, the shape and thickness of the package 81 are constant even if the stroke of the pressure plate 55 is constant. As each spring 57 expands and contracts according to the
While the 58 is surely brought into close contact with the upper surface of the article 81 to be packaged, the article 81 to be packaged is pressed with an appropriate force. For example, even if the object 81 to be packaged has a large thickness, excessive force is applied to the object to be packaged.
It will not be destroyed by joining 81,
Even if the object to be packed 81 is thin, the pressure is insufficient and the packing bag 82
There are no wrinkles.

By the way, it is difficult to make all operations of the front, rear, left and right pressurizing cylinder devices 31 completely the same,
Usually, there is some time difference in the operation. Therefore, if a plurality of cylinder shafts 39 are directly connected to the pressure plate 55 that directly presses the object to be packaged 81, the pressure plates 55 do not operate evenly, and if one of the pressure cylinder devices 31 fails, The pressure plate 55 may not operate. However, in the above-described embodiment, the lifting force of the plurality of cylinder shafts 39 causes the support shaft of the central portion of the support rigid body 52 to move.
Since it is concentrated on 54 and is transmitted to the pressure plate 55 via this support shaft 54, the transmission of the lifting force to the pressure plate 55 becomes uniform,
The article to be packaged 81 is also pressed uniformly.

Further, assuming that the pressure plate 55 and the pressure receiving plate 58 cannot be in a state other than the horizontal state, when the shape of the object to be packaged 81 is different in the front, back, left and right, the thin portion of the object to be packaged 81 is under-pressed. On the contrary, the thick part may be over-pressurized. However, the pressure receiving plate 58 supported by the plurality of springs 57 is tilted at the upper side to cope with the difference in thickness between the front, rear, left, and right of the packaged object 81, and the support shaft is also supported at the lower side. The pressing plate 55, which is supported so as to be able to swing up and down, tilts and corresponds to the 54, and the entire packaged object 81 is pressed uniformly.

Then, after the vacuum chamber 21a and the inside of the packaging bag 82 are substantially evacuated, the sealing step is performed.

In the sealing step, the switching solenoid valve is actuated to connect the connection port of the heat ray operating cylinder device 62 to the vacuum pump,
The cylinder shaft 64 rises, and the heat ray 13 is pressed against the heat ray receiver 68 across the opening 82a of the packaging bag 82. At the same time, the heating wire 66 is energized, and the opening 82a of the packaging bag 82 is heat-welded and sealed. At this time, in the deaeration process, the pressure plate 55 prevents the packaging bag 82 from expanding and deforming, and
Since the opening 82a of the packaging bag 82 is held by the opening holding device 71 and the occurrence of shift and wrinkles at the opening 82a of the packaging bag 82 is prevented, the sealing in the wrinkled state is sure. Therefore, the opening 82a is reliably sealed.

Next, a vacuum breaking step is performed.

In the vacuum breaking step, the supply / exhaust port 25 of the pressure resistant container 21 is communicated with the atmosphere, and the inside of the vacuum chamber 21a is brought to atmospheric pressure. At this time, since the inside of the sealed packaging bag 82 is in a vacuum state, the packaging bag 82 and the article to be packaged 81 contract and come into close contact, but the article to be packaged 81 is pressed by the pressure plate 55. Therefore, it is possible to prevent wrinkles and disorder of the shape due to storage deformation.

Moreover, as described above, the pressure plate 55 is installed in the vacuum chamber 21.
Since the object 81 to be packaged is pressed by a force independent of the pressure in a,
The packaged object 81 can be pressed with sufficient force until the end of the vacuum breaking step. Therefore, even in the vacuum breaking step, generation of wrinkles and disorder of the shape are surely prevented.

Further, even if the object to be packaged 81 contracts, since the pressure receiving plate 58 that sandwiches the object to be packaged 81 with the pressure plate 55 is supported by the spring 57, a sufficient pressure force is applied to the object to be packaged 81. To be done.

Furthermore, when the inside of the vacuum chamber 21a is brought to atmospheric pressure, the upper container body 2
The binding force between the 3 and the lower container body 22 is weakened, and at this time, if the pressure cylinder device 31 applies a pressure to the pressure plate 55, the upper container body 23 is opened with impact, but A shock is applied to the spring between the upper container body 23 and the pressure receiving plate 58.
57 absorbs.

Next, the upper container body 23 is opened, the packaging bag 82 containing the article to be packaged 81 is taken out, and the packaging work is completed.

According to the above configuration, the packaging bag 82 accommodating the article 81 to be packaged can be easily attached, and the upper container body 23 and the lower container body 22 are separated by the vacuum chamber 21.
Since the negative pressure inside a is combined, the negative pressure inside the pressure-resistant container 21 and the packaging bag 82 and the pressing of the object 81 to be packed by the pressing plate 55 are automatically performed, so that the packing is completed efficiently and in a short time. Can be carried out. Then, it is possible to obtain a package having a small thickness, a small volume, and a wrinkle-free appearance over the entire surface including the sealing portion.

Further, since the pressure plate 55 that presses the object to be packaged 81 is driven by the pressure cylinder device 31 that operates by air pressure, this pressure cylinder device 31 can be operated by a vacuum pump that makes the inside of the vacuum chamber 21a a negative pressure. Is possible.

In the above embodiment, the pressure plate 55 driven by the pressure cylinder device 31 is positioned below the object 81 to be packaged, and the spring
Although the pressure receiving plate 58 supported by 57 was positioned on the upper side,
The pressure plate 55 may be located on the upper side and the pressure receiving plate 58 may be located on the lower side.

[Effect of device]

According to the present invention, the object to be packaged in the packaging bag is moved in the thickness direction with a force independent of the pressure in the pressure resistant container by the pressure plate driven by the pressure cylinder device provided in one container body. By pressing, the object to be packaged can be pressed with sufficient force even in the initial stage of the degassing process and the final stage of the vacuum breaking process. It is possible to surely prevent wrinkles from occurring and shift of the opening portion, and to compress the object to be packaged so that its shape can be surely adjusted. Therefore, even in the sealing step, the opening portion of the packaging bag is prevented. Wrinkles can be reliably sealed without wrinkles, and wrinkles and irregularities in the shape due to shrinkage deformation of the packaging bag and the packaged product can be reliably prevented in the vacuum breaking process, and it can be applied to the other container body. With pressure plate Therefore, since the pressure receiving plates sandwiching the packaged object are supported by the plurality of springs, the vacuum break is further prevented regardless of the thickness of the packaged object and even if the thickness of the packaged object is different, for example, in the front, back, left and right. Even if the packaged object shrinks during the process, the packaged object can be pressed with an appropriate force, the volume can be reduced, and a tightly sealed package with good appearance can be obtained. The spring can also absorb the impact generated by the pressing of the pressure plate when the coupling force between the two container bodies is weakened due to the pressure increase.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the vacuum packaging device of the present invention, FIG. 2 is a vertical sectional side view showing a state in which an object to be packaged is pressed by a pressure plate, and FIG. 4 is a plan view excluding the upper container body, FIG. 4 is a cross-sectional front view of the vicinity of the opening holding device, and FIG. 5 is a vertical sectional side view showing an example of a conventional vacuum packaging device. 21 …… pressure resistant container, 22 …… container body, 23 …… container body, 25 ……
Air supply / exhaust port, 31 ... Pressure cylinder device, 55 ... Pressure plate,
57 …… Spring, 58 …… Pressure receiving plate, 61 …… Sealing device, 81 ……
Items to be packaged, 82 ... Packaging bag, 82a ... Opening.

Claims (1)

[Scope of utility model registration request] 1. A pressure-resistant container having a supply / exhaust port, which comprises a pair of container bodies in which a packaging bag accommodating an object to be packaged is attached and joined so as to be detachable, and is connected to the supply / exhaust port of the pressure-resistant container. A vacuum packaging device comprising: a deaeration device for degassing the inside of the pressure-resistant container by depressurizing the inside of the pressure-resistant container; and a sealing device provided in the pressure-resistant container for sealing the opening of the packaging bag. A movable pressure plate that presses the packaged object stored in the packaging bag in the thickness direction is provided inside the pressure resistant container, and the pressure inside the pressure resistant container is provided outside one container body of the pressure resistant container. And a pressure cylinder device which is operated independently and pneumatically and is connected to the pressure plate to drive the pressure plate. The pressure cylinder device is provided on the other container body of the pressure resistant container so as to face the pressure plate. A plurality of pressure receiving plates for sandwiching the article to be packaged stored in the packaging bag are provided. A vacuum packaging device characterized by being supported by a spring.