JP2015224073A - Vacuum packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum packaging device which detects with good accuracy that an expansion amount of a packaging bag has reached a predetermined amount, and which has little risk of damaging the packaging bag.SOLUTION: A vacuum packaging device 1 includes: a chamber 2 for accommodating a packaging bag M in which an object to be packaged is accommodated; a deaeration part 3 for decompressing inside the chamber 2; a bag mouth opening/closing part 4 provided inside the chamber 2 and for opening/closing the mouth of the packaging bag M; and a sealing part 5 for sealing the mouth of the packaging bag M in a closed state. It also includes an optical sensor part 6 for detecting expansion of the packaging bag M inside the chamber 2. The chamber 2 has: a placing table 21 where the packaging bag M is placed; and an openable/closable lid 22 for covering the packaging bag M placed on the placing table 21. The optical sensor part 6 has: a light emitter 611; a reflector 612 for reflecting the light emitted from the light emitter 611; and a light receiver 613 for receiving the light reflected by the reflector 612.

Description

  The present invention relates to a vacuum packaging apparatus that performs deaeration in a packaging bag that accommodates an object to be packaged and vacuum-packages the object to be packaged.

  Conventionally, vacuum packaging is known as one of packaging methods for packaging an object to be packaged such as food. In vacuum packaging, a packaging bag in which an object to be packaged is accommodated is accommodated in a chamber of a vacuum packaging apparatus. This is done by sealing.

  In this vacuum packaging, the package to be vacuum packaged contains liquids that are hotter than room temperature, for example, soup, curry, boiled foods containing boiled juice, foods soaked in heated oil, etc. If the dish is warm and hot, if the pressure inside the chamber is sufficiently reduced to degas so that no air bubbles remain in the packaging bag after vacuum packaging, the liquid will boil and open the packaging bag. There is a risk that the inside of the chamber will be soiled.

  For this purpose, the inside of the chamber is depressurized by evacuation, and the gas degassed from the liquid in the package due to the depressurization and the pressure in the bag are vaporized when the pressure in the packaged liquid falls below the boiling pressure. When the packaging bag is inflated to a predetermined amount by the gas, vacuuming is stopped and the gas in the packaging bag is released into the chamber. It is known (see, for example, Patent Document 1).

JP2013-203402A

In the vacuum packaging apparatus described in Patent Document 1, the amount of expansion of the packaging bag is detected by the following method.
A flat bag contact portion that contacts the upper side of the packaging bag placed sideways in the chamber is provided, and one end of the bag contact portion is pivotally supported. As the packaging bag expands, the free end of the other end of the bag contact portion moves up and down, and the amount of expansion of the packaging bag is detected based on the position of the free end.

  However, in the vacuum packaging apparatus described in Patent Document 1, when the amount of expansion of the packaging bag to be detected is small, that is, when the difference in the size of the packaging bag before and after expansion is small, the amount of expansion of the packaging bag However, there is a problem that the accuracy of detecting that the predetermined amount has been reached decreases. In particular, it is difficult to detect when the packaging bag is small. Furthermore, since the pressure for expanding the packaging bag must be larger than the weight of the bag contact portion, when the pressure for expanding the packaging bag is small, it is detected that the amount of expansion of the packaging bag has reached a predetermined amount. There is a problem that accuracy decreases. Further, if dirt or the like adheres to the shaft support portion, the bag contact portion does not rotate smoothly, and the accuracy of detecting that the amount of expansion of the packaging bag has reached a predetermined amount may be reduced. In addition, since the bag contact portion comes into contact with the packaging bag, the packaging bag may be soiled or damaged such as opening a hole in the packaging bag.

  The present invention has been made to solve the above-mentioned problems of the prior art, accurately detecting that the expansion amount of the packaging bag has reached a predetermined amount, and damaging the packaging bag. An object of the present invention is to provide a vacuum packaging device that is less likely to be given.

  According to a first aspect of the present invention, there is provided a chamber for storing a packaging bag containing an article to be packaged, a deaeration part for depressurizing the inside of the chamber, and opening and closing of a bag mouth provided in the chamber for opening and closing the mouth of the packaging bag. Part and a sealing part for sealing the mouth of the packaging bag in the closed state, comprising a photosensor part for detecting expansion of the packaging bag in the chamber, A mounting table on which the packaging bag is mounted; and an openable / closable lid that covers the packaging bag mounted on the mounting table. The light sensor unit includes a light emitter and light emitted from the light emitter. The present invention relates to a vacuum packaging apparatus comprising: a reflector that reflects light; and a light receiver that receives light reflected by the reflector.

  The invention according to claim 2 relates to the vacuum packaging apparatus according to claim 1, wherein the light emitter and the light receiver are provided on the mounting table, and the reflector is provided on the lid.

  A third aspect of the present invention relates to the vacuum packaging apparatus according to the first or second aspect, comprising the two optical sensor units having different detection heights.

According to the vacuum packaging apparatus of the invention according to claim 1, since the optical sensor unit detects that the packaging bag has expanded to a predetermined position in the chamber, the expansion amount of the packaging bag has reached a predetermined amount. It can be detected with high accuracy. Further, since the detection is performed by the optical sensor unit, it is possible to accurately detect that the expansion amount of the packaging bag has reached a predetermined amount even if the pressure at which the packaging bag expands is small.
Further, since the optical sensor unit detects expansion without coming into contact with the packaging bag, there is little risk of damaging the packaging bag or opening a hole in the packaging bag.
Further, when the liquid of the packaged object leaks into the chamber from pinholes or scratches on the packaging bag, the leaked liquid vapor fills the chamber when evacuated, and the optical path of the optical sensor unit is blocked. Therefore, it is possible to detect leakage of liquid from the packaging bag by monitoring the interruption of the optical path of the optical sensor unit.
In addition, the optical sensor unit may include a set of light emitters, reflectors, and light receivers, or may include a plurality of sets of light emitters, reflectors, and light receivers. When there are multiple sets of light emitters, reflectors, and light receivers, any one of the multiple sets of light emitters, reflectors, or light receivers detected the expansion of the packaging bag. Sometimes, the optical sensor unit may detect the expansion of the packaging bag, or when all of the plural sets of light emitters, reflectors, and light receivers detect the expansion of the packaging bag, the light The sensor unit may detect the expansion of the packaging bag.

  According to the vacuum packaging device of the invention according to claim 2, the reflector is provided on the lid. Therefore, the position of the reflector when the lid is open is different from the position where the light from the light emitter is reflected to the light receiver. Therefore, if the condition at the start of operation of the vacuum packaging device is that light from the light emitter is incident on the light receiver, it is possible to prevent an error in starting operation with the lid open without closing.

According to the vacuum packaging apparatus of the invention which concerns on Claim 3, two optical sensor parts from which detection height differs are provided. For this reason, two levels of expansion of the packaging bag to be detected can be provided. By this, for example, when the expansion amount of the packaging bag due to vacuuming in the chamber with the mouth of the packaging bag closed is one of the two levels, the vacuuming is stopped, and thereafter When the opening of the packaging bag is opened and the expansion amount of the packaging bag reaches the other of the two levels, a method of closing the opening of the packaging bag again and restarting evacuation can be performed. Thereby, deaeration in a packaging bag can be performed efficiently. As described above, since the two optical sensor units having different detection heights are provided, the vacuum packaging apparatus can be operated by various methods. Therefore, it is expected that the degassing in the packaging bag can be efficiently performed. .
One optical sensor unit may be provided. The cost of the vacuum packaging device can be reduced. Moreover, it is good also as three or more optical sensor parts. By increasing the number of photosensors, the degassing operation method can be diversified, so degassing can be expected to be performed accurately and efficiently.

It is the schematic of the vacuum packaging apparatus which concerns on embodiment of this invention, (a) is a front view, (b) is a top view. It is a figure explaining the deaeration method by the vacuum packaging apparatus which concerns on embodiment of this invention. It is a figure explaining the deaeration method by the vacuum packaging apparatus which concerns on embodiment of this invention. It is a figure explaining the deaeration method by the vacuum packaging apparatus which concerns on embodiment of this invention. It is a figure explaining the deaeration method by the vacuum packaging apparatus which concerns on embodiment of this invention. It is a figure explaining the deaeration method by the vacuum packaging apparatus which concerns on embodiment of this invention. It is a figure explaining the deaeration method by the vacuum packaging apparatus which concerns on embodiment of this invention. It is a top view of the other form of the vacuum packaging apparatus which concerns on embodiment of this invention.

Hereinafter, preferred embodiments of the vacuum packaging device 1 according to the present invention will be described with reference to the drawings.
The vacuum packaging apparatus 1 includes a chamber 2 that accommodates a packaging bag M that contains an object to be packaged containing a liquid, a deaeration unit 3 that evacuates the chamber 2, and the packaging bag provided in the chamber 2. A bag mouth opening / closing part 4 for opening and closing the mouth of M, a sealing part 5 for sealing the mouth of the packaging bag M in a closed state, and an optical sensor part 6 for detecting the expansion of the packaging bag M in the chamber 2 (See FIG. 1). The optical sensor unit 6 detects that the expansion amount of the packaging bag M has reached a predetermined amount by detecting that the packaging bag has expanded to a predetermined position in the chamber 2. Moreover, the vacuum packaging apparatus 1 is provided with the control part 7 which controls operation | movement of each part.
In addition, in FIG. 1 and the following FIGS. 2-8, the optical path of the optical sensor part 6 is shown with the broken-line arrow L. FIG.

The chamber 2 includes a mounting table 21 on which the packaging bag M is mounted, and an openable / closable lid 22 that covers the packaging bag M mounted on the mounting table 21.
The lid 22 is pivotally supported at one end side by a shaft 22a and opens and closes by rotating in the vertical direction.
The lid 22 has a sealing material at a contact portion with the mounting table 21, and maintains the airtightness in the chamber 2 when closed.
The material of the lid 22 is not particularly limited, but it is preferable to use a transparent material (for example, AS resin) so that the state in the chamber 2 can be visually observed.
The deaeration unit 3 includes a vacuum pump 31 that sucks the gas in the chamber 2 and decompresses the chamber 2, and an electromagnetic valve (not shown) that releases the decompressed state in the chamber 2.

The bag opening / closing part 4 has a receiving base 41 having a rectangular upper surface provided on the mounting table 21, and a lower surface provided above the receiving table 41 so as to face the upper surface of the receiving base 41. And a holding block 42. The holding block 42 is attached to the lid 22. The cradle 41 is moved up and down by a command signal from the control unit 7 so as to sandwich the mouth of the packaging bag M with the holding block 42. Hereinafter, the state in which the cradle 41 is on the lower side is referred to as the open state of the bag mouth opening / closing unit 4, and the state in which the cradle 41 is on the upper side is referred to as the closed state of the bag mouth opening / closing unit 4. In addition, a motor, an air cylinder, etc. can be used for the vertical movement of the cradle 41.
The sealing part 5 has a heater built in the upper surface side of the cradle 41 and seals the opening of the packaging bag M by thermocompression bonding. A heat-resistant material (for example, a fluororesin sheet or the like) is affixed to the upper surface of the cradle 41 and the lower surface of the holding block 42 so that the packaging bag M does not adhere.

The optical sensor unit 6 includes a first optical sensor unit 61 and a second optical sensor unit 62 having different detection heights. The first optical sensor unit 61 detects an expansion upper limit A (described later) of the packaging bag M, and the second optical sensor unit 62 detects an expansion upper limit B (described later) of the packaging bag M. Since the expansion upper limit A is higher than the expansion upper limit B, the detection height of the first optical sensor unit 61 is higher than the detection height of the second optical sensor unit 62.
The first optical sensor unit 61 includes a light emitter 611 that emits light, a reflector 612 that reflects light emitted from the light emitter 611, and a light receiver 613 that receives light reflected by the reflector 612. Similar to the first optical sensor unit 61, the second optical sensor unit 62 includes a light emitter 621, a reflector 622, and a light receiver 623.
In addition, the detection height of each of the first optical sensor unit 61 and the second optical sensor unit 62 is set according to the size of the packaging bag M, the type and temperature of the article to be packaged, and the like.

The light emitters 611 and 621 are attached to a sensor mounting base 211 provided on the mounting table 21, and the light emitter 611 is attached above the light emitter 621.
The reflectors 612 and 622 are attached inside the block 42, and the reflector 612 is attached above the reflector 622.
The light receiver 613 is attached to the sensor mount 211 adjacent to the light emitter 611, and the light receiver 623 is attached to the sensor mount 211 adjacent to the light emitter 621. The light receiver 613 is attached above the light receiver 623.
Each position is adjusted so that light emitted from the light emitter 611 is received by the light receiver 613 after being reflected by the reflector 612. Further, the light emitter 621, the reflector 622, and the light receiver 623 are similarly adjusted.
As the light emitters 611 and 621, for example, light emitting diodes can be used. As the light receivers 613 and 623, photodiodes can be used. It is preferable to use a retroreflective photoelectric sensor in which a light emitter and a light receiver are integrated. If a retroreflective photoelectric sensor is used, the amount of expansion of the packaging bag M can be stably detected by the built-in polarizing filter.
The light emitters 611 and 621 and the light receivers 613 and 623 are housed in a transparent container 63 together with the sensor mounting base 211. The inside of the container 63 does not communicate with the chamber 2 and is maintained at atmospheric pressure even when the chamber 2 is evacuated. This eliminates the possibility of malfunctions caused by exposure of the light emitters 611 and 621 and the light receivers 613 and 623 and the electrical components provided in association therewith to a vacuum state. As a material of the container 63, for example, an AS resin may be used.

Next, a method for degassing the inside of the packaging bag M by the vacuum packaging device 1 will be described. Deaeration is performed by the following steps, for example.
(Step 1) The lid 22 is opened, and the packaging bag M containing the packaged material containing the liquid is set on the mounting table 21. At this time, the cradle 41 is lowered to open the bag opening / closing part 4 (see FIG. 2).
(Step 2) The lid 22 is closed, the cradle 41 is raised to close the bag mouth opening / closing part 4, and the mouth of the packaging bag M is sandwiched between the cradle 41 and the holding block 42 (see FIG. 3). .
At this time, the packaging bag M is in a state lower than the expansion upper limit B, and the optical paths of the first optical sensor unit 61 and the second optical sensor unit 62 are not blocked.
(Step 3) The chamber 2 is evacuated by the vacuum pump 31. The controller 7 operates the vacuum pump 31 so that the inside of the chamber 2 has a predetermined degree of vacuum. At this time, if the control unit 7 is set so that the vacuum pump 31 does not operate when light from the light emitter 611 and the light emitter 621 is not incident on the light receiver 613 and the light receiver 623, respectively. Forgetting to close the lid 22 and operating the vacuum pump 31 can be lost.
Note that. The predetermined degree of vacuum is set to a degree of vacuum in which the expansion amount of the packaging bag M due to the degree of vacuum exceeds the expansion upper limit A.
(Step 4) The packaging bag M expands as the pressure in the chamber 2 decreases due to evacuation by the vacuum pump 31. Even if the expansion amount of the packaging bag M exceeds the expansion upper limit B and the packaging bag M blocks the optical path of the second optical sensor unit 62, the control unit 7 continues the evacuation by the vacuum pump 31 as it is (see FIG. 4). .
(Step 5) Further, when the evacuation is continued, the expansion amount of the packaging bag M increases to exceed the expansion upper limit A, and the packaging bag M blocks the optical path of the first optical sensor unit 61, the control unit 7 controls the vacuum pump 31. Is stopped (see FIG. 5). Then, the control unit 7 lowers the cradle 41 to open the bag opening / closing unit 4 to release the opening of the packaging bag M, so that the pressure in the packaging bag M is the same as that in the chamber 2 (FIG. 6). reference).
As a result, the packaging bag M is deflated, and the gas generated in the packaging bag M (the gas degassed from the liquid in the package and the gas vaporized from the liquid in the package) enters the chamber 2 from the package bag M. To be released.
(Step 6) When the packaging bag M is deflated and the optical path of the second optical sensor unit 62 is not blocked, the control unit 7 closes the bag opening / closing unit 4 again to close the mouth of the packaging bag M (see FIG. 7). ).
Then, the control unit 7 repeats the operations from (Step 2) to (Step 6) a predetermined number of times.
(Step 7) The control unit 7 repeats the operations from (Step 2) to (Step 6) a predetermined number of times, and then seals the opening of the packaging bag M by thermocompression with the sealing unit 5.
(Step 8) Subsequently, the control unit 7 opens the electromagnetic valve of the deaeration unit 3 to make the pressure in the chamber 2 the same as the ambient pressure, and ends the deaeration operation.

  According to the vacuum packaging apparatus 1 of the present embodiment, since the optical sensor unit 6 detects that the packaging bag M has expanded to a predetermined position in the chamber 2, the expansion amount of the packaging bag M is a predetermined amount. It can be accurately detected that the upper limit A or the expansion upper limit B has been reached. In particular, even when the packaging bag M is small, it is possible to accurately detect that the expansion upper limit A or the expansion upper limit B set for the small packaging bag M has been reached. In addition, since the optical sensor unit 6 detects expansion without contacting the packaging bag M, there is little risk of damaging the packaging bag M or opening a hole in the packaging bag M.

  In addition, two standards, an expansion upper limit A, which is a reference for stopping the evacuation and releasing the opening of the packaging bag M, and an expansion upper limit B, which is a reference for closing the packaging bag M and restarting the evacuation, are provided. Since it is used and deaerated, it can be deaerated efficiently.

  When the light from the light emitter is directly received by the light receiver, the light emitter and the light receiver must be installed at a distance from each other, so that the wiring cost between the light emitter and the light receiver is increased. However, when the light from the light emitter reflected by the reflector is received by the light receiver as in this embodiment, the light emitter and the light receiver can be provided close to each other. As a result, the cost of wiring can be reduced.

Moreover, in the vacuum packaging apparatus 1 of this embodiment, when the liquid of the to-be-packaged material leaks into the chamber 2 from the pinhole or the crack of the packaging bag M, the vapor | steam of the leaked liquid is filled in the chamber 2 at the time of vacuuming, Since the optical path of the optical sensor unit 6 is interrupted, in step 5 described above, the control unit 7 determines that the packaging bag M has interrupted the optical path of the first optical sensor unit 61 and the second optical sensor unit 62 and performs evacuation. Stop. However, even if the control unit 7 opens the bag opening / closing unit 4 to release the opening of the packaging bag M, the state where the vapor is filled in the chamber 2 continues, and the first light sensor unit 61 and the second light sensor The optical path of the part 62 remains blocked.
Accordingly, in step 5, after the optical path of the first optical sensor unit 61 and the second optical sensor unit 62 is interrupted and the evacuation is stopped, the first optical sensor unit 61 and the second optical sensor even if a predetermined time elapses. By setting the control unit 7 so as to determine that an abnormal situation has occurred when the optical path of the unit 62 continues to be blocked, it is possible to cope with liquid leakage from the packaging bag M.
In addition, if the light from the light emitter 611 and the light emitter 621 is incident on the light receiver 613 and the light receiver 623 as a condition at the start of operation, the first light sensor unit 61 and the second light sensor unit 62 are provided. Since the operation cannot be performed if the first optical sensor unit 61 and the second optical sensor unit 62 are contaminated, it is possible to prevent malfunction.

In the present embodiment, each light emitter and light receiver is provided so that the optical paths of the first light sensor unit 61 and the second light sensor unit 62 are parallel to the longitudinal direction of the vacuum packaging device 1. The position of the light receiver is not limited to this position. For example, as shown in FIG. 8, a light emitter and a light receiver may be provided so that the optical paths of the first optical sensor unit 61 and the second optical sensor unit 62 connect the diagonal directions of the four corners of the chamber 2.
In the case of the packaging bag M having a shape where the expansion of the portion other than the center of the packaging bag M is the largest when the packaging bag M is expanded, the optical paths of the first light sensor unit 61 and the second light sensor unit 62 are the same. What is necessary is just to set so that an optical path may pass through the location where expansion | swelling becomes the largest, without passing through the center of the packaging bag M. FIG.

In the present embodiment, each of the first optical sensor unit 61 and the second optical sensor unit 62 includes a pair of a light emitter, a reflector, and a light receiver, but the first optical sensor unit 61 and the second optical sensor. The unit 62 may include a plurality of sets of light emitters, reflectors, and light receivers.
That is, in this embodiment, it was detected by a set of light emitters, reflectors, and light receivers that the expansion amount of the packaging bag M reached the expansion upper limit A or the expansion upper limit B. It may be detected by a reflector or a light receiver.

In this case, for example, when any one of the plurality of sets of light emitters, reflectors, and light receivers detects the expansion amount of the packaging bag M, the light sensor portion is wrapped. The amount of expansion of the bag M may be detected, or when all of the plurality of sets of light emitters, reflectors, and light receivers detect the amount of expansion of the packaging bag M, the optical sensor portion is the packaging bag. The amount of expansion of M may be detected.
That is, for example, when the first light sensor unit 61 has three sets of light emitters, reflectors, and light receivers, when the chamber 2 is evacuated, the three light emitters, reflectors, light receivers When the optical path of any one of the light emitters, reflectors, and light receivers is interrupted, the control unit 7 determines that the expansion amount of the packaging bag M has increased to exceed the expansion upper limit A, and stops vacuuming. It may be. In addition, when all the light paths of the three sets of light emitters, reflectors, and light receivers are blocked, the control unit 7 determines that the expansion amount of the packaging bag M has increased to exceed the expansion upper limit A, and vacuuming is performed. You may make it stop.
When the first light sensor unit 61 or the second light sensor unit 62 includes a plurality of sets of light emitters, reflectors, and light receivers, the accuracy of detecting the expansion amount of the packaging bag M can be increased. .

In the present embodiment, the number of optical sensor units is two, but the number of optical sensor units may be one. In that case, for example, the optical sensor unit is configured to detect the expansion upper limit A. Then, the chamber 2 is evacuated to increase the expansion amount of the packaging bag M to exceed the expansion upper limit A. When the packaging bag M blocks the optical path of the optical sensor unit, the vacuuming is stopped and the bag mouth opening / closing unit 4 is opened. Put it in a state. Then, after opening the bag mouth opening / closing part 4, the bag mouth opening / closing part 4 may be closed after a predetermined time has elapsed to resume the vacuuming. Since there is one optical sensor unit, the cost of the vacuum packaging device 1 can be reduced.
Moreover, it is good also as three or more optical sensor parts. For example, the number of optical sensor units is three, and an expansion upper limit C between the expansion upper limit A and the expansion upper limit B is further provided for the expansion upper limit A and the expansion upper limit B. Then, after evacuation in the chamber 2 is started, the evacuation speed is slowed when the expansion amount of the packaging bag M exceeds the expansion upper limit C, and the evacuation is stopped when the expansion amount exceeds the expansion upper limit A thereafter. It may be.
By increasing the number of photosensors, the degassing operation method can be diversified, so degassing can be expected to be performed accurately and efficiently.

  In this embodiment, in step 2-5, the chamber 2 is evacuated with the mouth of the packaging bag M closed. However, the evacuation may be performed with the mouth of the packaging bag M opened. The chamber 2 is depressurized by evacuation, the gas degassed from the liquid in the package by the depressurization, and the gas vaporized when the pressure in the bag falls below the pressure at which the liquid in the package boils Since the packaging bag M is inflated, it can be deaerated even if evacuation is performed with the mouth of the packaging bag M opened. In addition, when evacuation is performed with the opening of the packaging bag M opened, it is preferable to gradually reduce the pressure so that the liquid of the object to be packaged does not blow out and blow out from the opening of the packaging bag M.

  In the present embodiment, the control unit 7 controls the operation of each unit, but may be controlled by human intervention.

The present invention is suitably used in a vacuum packaging apparatus for vacuum packaging food such as soup and curry.
In addition, when vacuum packaging is performed with a high degree of vacuum, the pressure difference between the inside and outside of the packaging bag in the chamber does not increase even if the package is degassed depending on the type of package and the deaeration conditions. The amount of expansion of the packaging bag may be small. However, the vacuum packaging apparatus of the present invention can accurately detect that the expansion amount of the packaging bag has reached a predetermined amount as compared with the conventional case, so that solids and mechanism parts containing a lot of moisture such as boiled foods. It is suitably used in a vacuum packaging apparatus that performs vacuum packaging of a product that requires a high degree of vacuum such as a solid material that does not contain moisture.

DESCRIPTION OF SYMBOLS 1 Vacuum packaging apparatus 2 Chamber 21 Mounting stand 22 Lid 3 Deaeration part 4 Bag opening / closing part 5 Sealing part 6 Optical sensor part 611,621 Light emitter 612,622 Reflector 613,623 Light receiver 63 Container M Packaging bag

Claims (3)

A chamber for storing a packaging bag containing an article to be packaged, a deaeration unit for depressurizing the inside of the chamber, a bag mouth opening / closing unit provided in the chamber for opening and closing the mouth of the packaging bag, and the packaging in a closed state A vacuum packaging device comprising a sealing part for sealing the mouth of the bag,
An optical sensor unit for detecting expansion of the packaging bag in the chamber;
The chamber has a mounting table on which the packaging bag is mounted, and an openable / closable lid that covers the packaging bag mounted on the mounting table.
The vacuum packaging device, wherein the optical sensor unit includes a light emitter, a reflector that reflects light emitted from the light emitter, and a light receiver that receives light reflected by the reflector.   The vacuum packaging apparatus according to claim 1, wherein the light emitter and the light receiver are provided on the mounting table, and the reflector is provided on the lid.   The vacuum packaging apparatus according to claim 1, further comprising two optical sensor units having different detection heights.

Images