JPH10310110A - Deaeration port of vacuum packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deaeration port or a vacuum packaging device which has a favorable ventilation function and such a structure that a bag-form packaging article can be arranged in the vacuum chamber without hindrance. SOLUTION: The external plate of a deaeration port 70 of a vacuum chamber is formed to shape a nearly triangular section by the back board 75 vertically erected against an arrangement base 6 and an inclined board 82 slanting down forward from the back board 75. A fixing plate 91 provided with vertical plates at a specified distance parallelly to the back board 75, is arranged in the inside of the external plate of the deaeration port 70. And a filter 88 is contained in the space formed between the back board 75 and the vertical plate of the fixing plate 91 and an air intake 77 is formed on the back board and an air- connection hole 95 is formed on the vertical plate. In this way, the ventilation function of the filter does not deteriorate and the air intake 77 is not easily blocked and a liquid does not penetrate in the deaeration circuit even when one has spilt the liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deaeration of a vacuum packaging apparatus in which an object to be packaged such as food is placed in a heat-adhesive bag-like package, and the package is hermetically sealed by heat-sealing. Regarding port structure.

[0002]

2. Description of the Related Art A so-called vacuum package in which an article to be packaged such as food is placed in a heat-adhesive bag-like package, and the inside of the bag-like package is degassed, decompressed, and then heat-sealed to seal the package. The apparatus has conventionally been generally configured as follows. That is, a vacuum chamber is formed between the upper surface of the main body as a mounting table and a lid that opens and closes the mounting table, and a degassing port provided in the vacuum chamber and a pipe provided in the main body are provided. Through this, the vacuum chamber is connected to a vacuum pump and a line for opening to the atmosphere, so that the vacuum chamber can be depressurized or opened to the atmosphere. Then, a bag-like package having a one-sided opening containing a food or the like to be packaged is disposed in the vacuum chamber, and at this time, the opening to be closed of the bag-like package is positioned at a predetermined position of the impulse-type heat sealing mechanism. After that, the lid of the vacuum chamber is closed (mounting step). The vacuum pump is operated in conjunction with the closing operation of the lid to reduce the pressure in the vacuum chamber. The negative pressure keeps the lid closed and deaerates the inside of the bag-shaped package (deaeration step). A pressure sensor detects that the pressure in the vacuum chamber has reached a predetermined pressure, and this deaeration step is completed. Then, a seal bar and a lid provided with a heat-sealing heater wire of an impulse-type heat sealing mechanism are provided. The opening of the bag-like package is sandwiched by a heat ray receiving portion (silicon plate) attached to the lower surface of the body. Then, the heater wire attached to the seal bar is heated to heat and seal the opening of the bag-shaped package by heat welding (heat sealing step). When the heat sealing process is completed, the air release valve of the air release line is opened to communicate the inside of the vacuum chamber with the atmosphere, and the inside of the vacuum chamber is raised to atmospheric pressure (atmosphere release process), and the lid is kept closed. Then, the lid is automatically opened by the lid opening / closing mechanism using the elastic force of the elastic body. Further, by this opening, the sandwiching of the bag-like package by the seal bar and the heat ray receiving portion is released, and the sealed bag-like package can be taken out to complete the vacuum packaging.

[0003] In the above-described vacuum packaging apparatus, a degassing port 101 for connecting a vacuum chamber to a vacuum pump or an open-to-atmosphere line has been configured, for example, as shown in FIG. In FIG. 6, the deaeration port 101 is
3 is a rectangular parallelepiped shape projecting into the vacuum chamber 102 from the upper surface, and the casing 104 is configured by stacking a box-shaped upper casing 104a having a lower surface opening and a box-shaped lower casing 104b having an upper surface opening. Yes,
Inside the casing 104, a filter fixing plate 106 having a mountain-shaped cross section with an inclined upper surface is disposed, and the inclined upper surface 106a of the filter fixing plate 106 and the upper casing 104 are arranged.
The flat filter 110 was housed in a triangular space defined between the filter 110 and the filter 110. An air intake 107 having a plurality of holes is provided on the upper surface of the upper casing 104a.
An air communication hole 108 composed of a plurality of holes is formed in 6a, and an air pipe connection port 109 for connecting an air pipe is provided on the bottom surface of the lower casing 104b. It was connected to a vacuum pump mounted inside and an open line to the atmosphere. Therefore, in the vacuum packaging apparatus having the deaeration port 101 having the above configuration, in the deaeration step, the vacuum chamber 10 is used.
The air in the air inlet 2 of the deaeration port 101 is
7, dust such as dust is removed by the filter 110, and is sucked into the vacuum pump through the air communication hole 108 and the air pipe connection port 109. Further, in the above-described step of opening to the atmosphere, the vacuum chamber 102 was opened to the atmosphere via the degassing port 101.

[0004]

In the structure of the deaeration port 101 in the above-mentioned conventional vacuum packaging apparatus, the filter fixing plate 106 disposed inside the upper and lower casings 104a and 104b has a triangular cross section. Therefore, the filter fixing plate 106 itself is formed by one bending, and has an advantage that the structure is simple and the manufacturing is easy. However, since half of the flat filter 110 is compressed and crushed, The air permeability of a part of the filter 110 was deteriorated. Further, since the air intake 107 is opened on the upper surface of the upper casing 104a, when a large bag-like package is used, there is a possibility that the air intake 107 is covered and covered by a part of the bag-like package. was there. In addition, there is a defect that dust accumulates in the air intake port 107 and the filter 110 inside the air intake port 107, which easily causes clogging. Further, when the object to be packaged is a liquid substance, the liquid substance spills from above the air intake port 107 and enters the deaeration port 101 from the air intake port 107 or into piping connected to a vacuum pump. There was a risk of stagnation. Incidentally, when the vacuum pump is operated while the liquid material remains, there is a risk that the vacuum pump is damaged.

The present invention has been made by paying attention to such problems existing in the prior art. The purpose is a vacuum with a venting port that has good ventilation, does not hinder the placement of bag-like packages, and does not allow liquid to enter. An object of the present invention is to provide a packaging device.

[0006]

In order to achieve the above object, according to the present invention, a vacuum chamber is formed between a mounting table and a lid for opening and closing the mounting table. In a vacuum packaging apparatus provided with a deaeration port of a vacuum chamber containing a filter on a placement table, an outer plate of the deaeration port is provided with a back plate vertically suspended from the placement table and an upper end of the back plate. An inclined plate that is inclined forward and downward, and a bottom plate disposed between the lower end of the inclined plate and the lower end of the back plate are formed to have a substantially triangular cross section. A fixed plate having a vertical plate parallel to the back plate at a predetermined interval is provided, and a filter is housed in a space defined between the back plate and the vertical plate of the fixed plate, The plate has an air intake, the vertical plate has an air communication hole, The serial bottom plate is provided with a air piping connections to contact the vacuum pump downstream of the filter, respectively.

Therefore, the first aspect of the present invention is configured as described above.
In the vacuum packaging apparatus described above, air in the vacuum chamber is sucked in from the air intake port provided on the back plate of the deaeration port, and is evacuated through the filter, the air communication hole of the fixed plate, and the air pipe connection port. Inhaled into pump and open line. At this time, the filter stored in the deaeration port
Since it is housed in the rectangular parallelepiped space defined by the back plate and the vertical plate of the fixed plate, there is no partial compression unlike the related art, and the air permeability does not decrease. Also, since the deaeration port has a triangular outer cross section and the air intake port is provided on the vertical back plate, it may be an obstacle when arranging a large bag-shaped package on this placement table. Is reduced. Also, dust and the like do not accumulate in the air intake. Furthermore, even if a liquid substance such as a packaged object is spilled above the degassing port, there is no fear that the liquid substance enters the degassing port or a pipe communicating with the vacuum pump.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail with reference to FIGS. FIG.
Is a longitudinal sectional view of the vacuum packaging device according to the first embodiment of the present invention as viewed from the side. In the following description, regarding the position or direction of each part, the left side when viewed in FIG. “Front” and the right side are “rear”, and the direction perpendicular to the paper is the left-right direction. The dotted line in the figure shows a state where the lid of the vacuum packaging device is closed.

In FIG. 1, a vacuum packaging apparatus 5 includes a main body 7.
And a lid 9 that can be opened and closed to open and close the upper surface of the main body as the placement table 6. The main body 7 is box-shaped, and has a vacuum pump 11, a vacuum valve 12 which may be an electromagnetically driven solenoid valve, an atmosphere release valve 13, and a manually opened and closed always in use. An open ball valve 14, a seal valve 15, a seal cylinder assembly 17, a vacuum gauge 18, and the like are provided.

Further, as shown in the air piping system diagram of FIG. 2, the deaeration port 70 is disposed so as to protrude from the upper surface of the main body 7, that is, the placement table 6, although the detailed structure will be described later. The vacuum pump 11 is connected via a pipe d, a pipe c provided with a vacuum valve 12 and a pipe a. Therefore, when the lid 9 is closed and a vacuum is drawn, the gas in the vacuum chamber (vacuum packaging chamber) 21 is sucked from the degas port 70. The deaeration port 70 is connected to an atmosphere release line formed by pipes d and e, and is configured to allow the vacuum chamber 21 to communicate with the atmosphere through the atmosphere release line. The pipe e is provided with an atmosphere release valve 13 and a ball valve 14. A vacuum gauge 18 is connected to the middle of the pipe d via a pipe f.
The seal valve 15 is a three-way switching valve having an atmosphere opening port 15a, and the vacuum pump 11
5 is connected to a pressure reducing chamber 31 of the seal cylinder assembly 17 by a pipe b.

The lid 9 is a housing having an open bottom, and as shown by a dotted line in FIG.
When the lid 9 is closed so as to come into contact with the main body 7 as the placement table 6 by the sealing function of the packing 9b,
That is, the above-described vacuum chamber 21 is defined inside the lid 9. On the other hand, when the lid 9 is opened from the state shown by the dotted line to the state shown by the solid line as shown in FIG. 1, the vacuum chamber 21 is communicated with the outside through the opening 9 a of the lid 9. On the inner surface of the upper part of the lid 9, a heat ray receiving portion 50 for sealing and bonding is provided.
Are provided so as to protrude downward.

On both left and right sides of the rear portion of the lid 9, there are provided pivots 23 extending in the horizontal direction perpendicular to the plane of the drawing, and the lid 9 rotates around the pivot 23 including a rotating shaft. Move. Further, an arm portion 25 extending downward from the shaft support portion 23 is provided at the rear portion of the lid 9 so as to be rotatable integrally with the lid 9. An elastic body 27 for urging the lid 9 to rotate in the opening direction, a leading damper (buffer mechanism) 29 that generates resistance only to the rotation of the lid 9 in the opening direction, and the like are attached to the arm portion 25. I have.

The impulse heat sealing mechanism comprises a seal cylinder assembly 17 and the sealing adhesive heat ray receiving portion 50. The seal cylinder assembly 17 includes a cylinder 32, a decompression chamber 31, a seal bar 60, a piston 35,
It comprises a spring 37 and the like. The decompression chamber 31 is defined by the inner surface of the cylinder 32 and the piston 35, and the seal bar 60 is connected to the piston 35 by a piston rod.
When the lid 9 is closed, the seal bar 60
And is mounted so as to protrude from the upper surface of the main body 7, that is, from the mounting table 6. A sheet-like heater wire (not shown) is attached to the upper surface of the seal bar 60, and the heater wire is configured to generate heat when energized. The spring 37 is disposed in the decompression chamber 31 and applies an elastic force to the piston 35 so as to urge the seal bar 60 and the piston 35 downward. Further, as described above, the distal end of the pipe b communicates with the decompression chamber 31. The impulse heat sealing mechanism is configured as described above. The opening of the bag-like package 8 is sandwiched between the heat ray receiving portion 50 and the seal bar 60, and the heater wire is heated to generate the bag-like package 8 (see FIG. 2) is heat-sealed.

Next, the structure of the deaeration port 70 will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 3 is a cross-sectional view of the deaeration port. The deaeration port 70 includes a casing including an upper casing 81 and a lower casing 72, a fixing plate 91,
It is composed of a filter 88. Lower casing 72
3 to 5, a rectangular bottom plate 73 as a bottom plate constituting an outer plate of the deaeration port 70, a trapezoidal side plate 74 bent from both ends of the bottom plate 73, and a rear end of the bottom plate 73 And a short inclined piece 76 bent from the front end of the bottom plate 73. The back plate 75
It constitutes a back plate as an outer plate of the deaeration port 70,
This back plate 75 has a plurality (in this case, 14 in total in upper and lower two rows)
Is provided with an air inlet 77 composed of a round hole.
One screw hole 78 is provided in each of the side plates 74, and an air pipe connection port 79 is provided in the center of the bottom plate 73.

As shown in FIGS. 3 to 5, the upper casing 81 includes an inclined plate 82 as an inclined plate forming an outer plate of the deaeration port 70, and a triangular side plate 83 bent from both ends of the inclined plate 82. A short vertical piece 8 with the upper end of the inclined plate bent
And the two side plates 83 have screw holes 8 for screws.
5 are provided. And this upper casing 81
Is assembled so as to cover the lower casing 72 from above, and after a fixing plate 91 and a filter 88 described later are disposed inside, the screws are fixed on both sides by screws 86. The fixing plate 91 is
As described above, it is disposed inside the casing 71, and as shown in FIGS. 3 and 4, the inclined plate 92 along the inclined plate 82 of the upper casing 81 and the front end of the inclined plate 92 are folded. The rear vertical plate 94 includes a bent front vertical plate 93 and a rear vertical plate 94 bent from the rear end of the inclined plate 92. The rear vertical plate 94 has a plurality of round holes for air communication. A hole 95 is provided. Although the whole of the air communication hole 95 is not shown in the drawing, the back plate 7 is not shown.
5 in the same way as the air intake 77 in the upper and lower two rows.
Four round holes are provided. Further, by disposing this fixing plate 91 inside the casing 71,
A substantially rectangular parallelepiped space is defined between the rear vertical plate 94 of the fixing plate 91 and the back plate 75 of the lower casing 72,
The filter 88 is accommodated in this space without being partially compressed.

Next, the operation of the vacuum packaging apparatus 5 of the present embodiment will be described. First, in a state where the lid 9 is fully opened (during standby), the arm portion 25 is pulled forward by the elastic body 27, and the lid 9 is fully opened as shown by a solid line in FIG. The user places the opening of the bag-like package 8 containing the article to be packaged 10 (see FIG. 2) on the distal end of the seal bar 60 in the heat sealing mechanism with the lid 9 opened in this manner. . At this time, the deaeration port 70
Since the upper casing 81 is inclined forward and the air intake port 77 is provided not on the upper surface but on the back plate 75, the handling space for the bag-like package 8 is increased, and
There is no fear that the air intake 77 is blocked by the bag-like package 8. Further, even if a liquid material as a packaged object is spilled from above the degassing port 70, there is no fear that the liquid material stays in the degassing port 70 or the pipes d and c connected to the vacuum pump 11. Then, after the bag-like package 8 to be heat-sealed is put into the vacuum chamber 21 and the lid 9 is closed, a switch linked to the lid 9 is turned on and the vacuum pump 1 is turned on.
1 is activated, and evacuation is performed.

When the vacuum pump 11 operates, as shown in FIG. 2, gas and the like in the vacuum chamber 21 are sucked by the vacuum pump 11 through the deaeration port 70, the pipe d, the pipe c, and the pipe a. It is evacuated (deaeration step). When the inside of the vacuum chamber 21 becomes a negative pressure, the lid 9 overcomes the elastic force of the elastic body 27 and is kept in a closed state by the negative pressure. In the deaeration port 70, gas in the vacuum chamber 21 is sucked from the air intake 77 of the back plate 75, and is sucked into the vacuum pump 11 through the filter 88, the air communication hole 95, and the air pipe connection port 79. Since the filter 88 is not partially compressed, the air flow resistance does not become unnecessarily large.

When the inside of the vacuum chamber 21 is depressurized to a predetermined pressure or less, the vacuum valve 12 is closed,
When the deaeration step is completed, the seal valve 15 is switched, and the seal cylinder mechanism 17 is connected to the vacuum pump 11 via the pipes b and a. Then, when the seal cylinder mechanism 17 is connected to the vacuum pump 11 and the vacuum pump 11 is operated, as is understood from FIGS. 1 and 2, the gas in the decompression chamber 31 of the seal cylinder assembly 17 is supplied to the pipe b.
And aspirated through a. As a result, the pressure in the decompression chamber 31 decreases, the piston 35 moves upward against the elastic force of the spring 37, and the seal bar 60 connected to the piston 35 also moves upward. The opening of the package 8 placed on the seal bar 60 is also moved upward together with the seal bar 60, and is sandwiched between the seal bar 60 and the heat ray receiving unit 50. At this time, in the seal bar 60, the heater wire is energized to generate heat, and the opening of the bag-like package 8 sandwiched between the seal bar 60 and the heat ray receiving portion 50 is heat sealed (heat sealing step).

After a lapse of a predetermined time, the heater wire is turned off, the atmosphere release valve 13 is opened, and the vacuum chamber 21 is opened.
When the inside is opened to the atmosphere, the pressure in the vacuum chamber 21 rises to the atmospheric pressure, the bag-like package 8 is brought into close contact with the packaged object 10, and the open-to-atmosphere step ends. In addition, due to this rise, the closing force acting on the lid 9 during the deaeration step and the sealing step is reduced, and the lid 9 in the state shown by the dotted line in FIG. It is gradually opened by the elastic force of 27 (opening operation of the lid 9). When the lid 9 is opened, the heat ray receiving portion 5 formed to protrude downward on the upper inner surface of the lid 9.
0 is lifted upward, and the heat ray receiver 50
The pinching of the opening of the bag-shaped package formed by the seal bar and the seal bar 60 is released (the pinching is released), and the bag-shaped package 8 can be taken out. Also, seal valve 1
5 is switched, the inside of the pressure reducing chamber 31 of the seal cylinder assembly 17 is communicated with the atmosphere through the atmosphere opening port 15a of the seal valve 15, and the pressure in the pressure reducing chamber 31 rises to the atmospheric pressure.
The piston 35 moves downward by the elastic force of the spring 37,
The seal bar 60 also moves downward and returns to the initial standby state.

[0020]

According to the present invention, as described above, the filter accommodated in the deaeration port is provided in the space defined between the back plate of the deaeration port and the vertical plate of the fixed plate. Since it is stored without being partially compressed, the air permeability does not decrease. In addition, since the deaeration port has a triangular outer cross-section and an air intake port is provided on the back surface perpendicular to the placement table, it is a hindrance when arranging a large bag-like package on the placement table. It is difficult to handle and is convenient for handling large bag-like packages. Also, there is no possibility that dust or the like accumulates in the air intake and causes clogging. Further, even if the liquid is spilled above the degassing port, the liquid does not enter the degassing port or the piping connected to the vacuum pump.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a vacuum packaging apparatus according to an embodiment of the present invention.

FIG. 2 is an air piping system diagram according to the vacuum packaging apparatus of FIG.

FIG. 3 is a sectional view of a degassing port according to the vacuum packaging apparatus of FIG.

FIG. 4 is an exploded perspective view of the deaeration port shown in FIG.

FIG. 5 is a perspective view of the deaeration port shown in FIG. 3;

FIG. 6 is a sectional view of a conventional deaeration port.

[Explanation of symbols]

5: vacuum packaging device, 6: placement table, 7: main body, 8: bag-shaped package, 9: lid, 10: packaged product, 70: deaeration port,
72: Lower casing, 73: Bottom plate (bottom plate as outer plate of deaeration port), 74: Side plate, 75 ... Back plate (back plate as outer plate of deaeration port), 76: Inclined piece, 77: Air intake Port, 78: screw hole, 79: air pipe connection port, 81:
Upper casing, 82: inclined plate (inclined plate as outer plate of deaeration port), 83: side plate, 84: vertical piece, 85: screw hole, 86: screw, 88: filter, 91: fixing plate, 92 ... an inclined plate, 93 ... a front vertical plate, 94 ... a rear vertical plate, 95 ... an air communication hole.

Claims (1)

[Claims] 1. A vacuum packaging apparatus, comprising: a vacuum chamber formed between a mounting table and a lid for opening and closing the mounting table; and a degassing port for a vacuum chamber containing a filter on the mounting table. An outer plate of the deaeration port, a back plate vertically provided with respect to a placement table, an inclined plate inclined forward and downward from an upper end of the back plate, a lower end of the inclined plate and a lower end of the back plate. A bottom plate disposed between the outer plate and a fixed plate having a vertical plate parallel to the back plate at a predetermined interval is disposed inside the outer plate.
A filter is accommodated in a space defined between the back plate and the vertical plate of the fixed plate, an air intake port is provided in the back plate, an air communication hole is provided in the vertical plate, and the bottom plate is provided in the bottom plate. A deaeration port of a vacuum packaging device, wherein air pipe connection ports for connecting a downstream side of the filter to a vacuum pump are provided.