JP6532243B2 - Vacuum packing machine - Google Patents

Description

  The present invention relates to a vacuum packaging machine for degassing the inside of a chamber with a vacuum pump and producing a negative pressure, and vacuum-packing the inside of the packaging bag in a degassed state. The present invention relates to a vacuum packaging machine capable of vacuum packaging.

The following Patent Documents 1 and 2 disclose a vacuum packing machine for vacuum-packing a packing bag containing a package such as a food or a food. The vacuum packaging machine, food, a chamber for accommodating a packaging bag that houses the packaged articles of food such as closed to clamp the opening portion of the packaging bag from the upper and lower at the front of the chamber and below the block body And a heater provided on the upper and lower block members for heat welding the periphery of the opening of the packaging bag, and an oil rotary vacuum pump for degassing the chamber to make it under negative pressure.

  The vacuum packaging machine of Patent Document 1 is mainly intended for vacuum packaging a package at normal temperature or less in a packaging bag, and various control devices for controlling the operation of the vacuum packaging machine are used. A number (for example, 10) of packaging programs for vacuum packaging the packaging bags are stored. An operation panel is provided on the front of the housing of the vacuum packaging machine, and the operation panel has an operation key for executing the above-mentioned packaging program, and a display panel for displaying the degree of vacuum in the chamber and various packaging programs selected. It is provided.

  In addition, when a liquid packaged material containing oil such as soup or stew is uniformly contained (dispensed) in a plurality of packaging bags, the components are higher than ordinary temperature at which the oil is not coagulated. It is necessary to divide and store a plurality of packaging bags with keeping the temperature (warm). The vacuum packaging machine of Patent Document 1 mainly for vacuum-packing a package at a temperature lower than normal temperature into a packaging bag, when vacuum-packing a packaging bag containing a package-level at a temperature higher than normal temperature There is a problem that the liquid in the bag is easily boiled and spilled into the chamber. For this reason, the vacuum packaging machine of Patent Document 2 makes it possible to vacuum-pack a packaging bag that accommodates a package at a temperature higher than normal temperature, and Patent Document 2 discloses that the normal temperature of this vacuum packaging machine. A packaging program is described for vacuum packaging high temperature packages into packaging bags.

JP, 2015-009823, A JP, 2013-203402, A

  Although there is a point which is not explained in full detail about the operating panel of a vacuum packing machine in patent documents 1, various operating keys for performing various packing programs are provided in the operating panel, and a part of these operation keys First to fourth direct operation keys are provided to automatically select a frequently used packaging program. In addition, a number (for example, 10) of the packaging programs are numbered, for example, 1 to 10. For example, the frequently used 1 to 4 packaging programs are assigned to the first to fourth direct operation keys. ing. The number of the selected packaging program is displayed on the display panel. For example, when the first direct operation key is pressed, “1” is displayed on the display panel, and the second direct operation key is displayed. When pressed, "2" is displayed on the display panel. When executing a less frequently used packaging program, press one of the 1st to 4th direct operation keys and use the "∧" operation key or "∨" to advance and retract the number while looking at the number displayed on the display panel The operation key is pressed to select the desired packaging program number. When a packaging program for vacuum-packing a package at a temperature higher than normal temperature in a packaging bag like the vacuum packaging machine of Patent Document 2 is added to the vacuum packaging machine of Patent Document 1, the package at normal temperature or less is Next to the numbers 1 to 10, which are numbered in the packaging program for vacuum packaging, a packaging program higher than normal temperature will be added. In this case, when executing a packaging program for vacuum-packing a packaged object having a temperature higher than normal temperature in the packaging bag, one of the first to fourth direct operation keys is pressed and displayed on the display panel. You need to select a packaging program that vacuum-packs a package at a temperature higher than normal temperature in a packaging bag by pressing the "∧" operation key or "∨" operation key while looking at the number. There was a problem that was not easy to use. The present invention is a vacuum packaging machine comprising a plurality of packaging programs suitable when the package is at a normal temperature or lower and a plurality of packaging programs suitable when the package is at a temperature higher than the normal temperature. Make it easy to select a packaging program for

In order to solve the above problems, according to the present invention, at least one of the upper and lower portions is supported so as to move up and down in the chamber which accommodates the packaging bag containing the package, and the opening peripheral edge of the packaging bag is vertically the block body and close vertically sandwiching from a heater for heat welding the periphery of the opening of the packaging bag provided on at least one of the upper and lower block body, and a vacuum pump for negative pressure by evacuating the interior of the chamber, The gas in the packaging bag contained in the chamber is discharged by making the pressure in the chamber negative by the operation of the vacuum pump, and then the periphery of the opening of the packaging bag is pinched and closed by the upper and lower block members to operate the heater Sealing the opening periphery of the packaging bag by heating and welding, the plurality of packaging programs of the first mode suitable when the package is at a normal temperature or less, and the operation of the vacuum pump. The inside of the bag is made negative pressure, and by moving the upper and lower blocks up and down the peripheral edge of the opening of the packaging bag in the negative pressure chamber, the closed state is opened and the gas in the packaging bag is discharged. bag after performing exhaust control one or more times, close to clamp the opening portion of the packaging bag by the upper and lower block body, sealed by heat welding the periphery of the opening of the packaging bag by the operation of the heater, to be packaged is What is claimed is: 1. A vacuum packaging machine comprising a control device storing a plurality of packaging programs of a second mode suitable when the temperature is higher than normal temperature, the plurality of packaging programs of the first mode and the plurality of second modes. an operation panel having an operation key for selecting the press operation a single packaging program from among the packaging program, the operation keys directly by pressing operation of one of a plurality of packaging programs in the first mode A first operation key-option, there is provided a vacuum packaging machine, characterized in that a second operation key for selecting directly by pressing operation of one of a plurality of packaging programs in the second mode.

In the vacuum packaging machine configured as described above, an operation having an operation key for selecting one packaging program from the plurality of packaging programs in the first mode and the plurality of packaging programs in the second mode by pushing operation. A panel is provided, and the operation key is a first operation key that directly selects one of a plurality of packaging programs in a first mode by a pressing operation, and one of a plurality of packaging programs in a second mode is directly selected by a pressing operation second since an operation key, one of the first or second mode of packaging program can be selected directly by a single press operation and better operability.

In the vacuum packaging machine configured as described above, the operation panel can select other packaging program according to the first mode by pressing the operation of the first mode of packaging program selected by the press operation of the first operation key Or a third operation key that enables selection of the packaging program in the second mode selected by the pressing operation of the second operation key to another packaging program in the second mode by the pressing operation, and the third operation When the pressing operation is performed by the key, the packaging program of the first mode selected by the first operation key is selected, and the packaging program of the second mode is selected, and only the other packaging program of the first mode is selected so as to allow, together with is stored in the control device a plurality of packaging programs in the first mode, when the pressing operation by the third operation key, selected by the second operation key Control a plurality of packaging programs in the second mode so that only the other packaging programs in the second mode can be selected without the packaging program in the second mode being selected It is preferable to store in the device, and one of the plurality of packaging programs in the first mode or one of the plurality of packaging programs in the second mode can be selected with as few operations as possible.

It is a perspective view showing the vacuum packing machine of the present invention by the state where a chamber cover was opened. It is the schematic which shows the various components of the vacuum packaging machine of this invention. It is a figure which shows an operation panel. It is a block diagram showing a control device. It is a flowchart of the packaging program of 1st mode. It is a flow chart of a packaging program with a fixed number of times of in-bag evacuation control in a second mode. It is a flowchart of a packaging program with variable number of times of in-bag evacuation control in a second mode.

  Hereinafter, an embodiment of a vacuum packaging machine of the present invention will be described with reference to the attached drawings. The vacuum packaging machine according to the present invention vacuum-packs packaged materials such as foodstuffs and food products in a packaging bag, and may vacuum-pack a packaging material having a temperature (warm or hot) higher than normal temperature in the packaging bag. It is possible.

  As shown in FIGS. 1 and 2, the vacuum packaging machine 10 includes a chamber 12 containing the packaging bag in the upper part of the housing 11 and a heat seal for sealing the periphery of the opening of the packaging bag at the front in the chamber 12. A stopper 20 and a vacuum pump 30 for degassing the inside of the chamber 12 at the lower part of the housing 11 to make it underpressure.

  As shown in FIG. 1, the chamber 12 is composed of a shallow dish-shaped chamber base 13 having an open upper surface, and a chamber cover 14 formed of a pressure-resistant acrylic plate that opens and closes the upper surface opening of the chamber base 13. Pressure-tight sealed container. The rear end portion of the chamber cover 14 is rotatably supported at the rear end portion of the housing 11 about a horizontal axis, and the front end side of the chamber cover 14 is vertically movable above the chamber base 13. Also, a spring member (not shown) is provided at the rear of the housing 11, and the chamber cover 14 is biased by the spring member so that the front end moves upward (so that the chamber cover 14 is opened). . A rubber packing 15 is provided as a sealing member around the lower surface of the chamber cover 14, and the packing 15 airtightly seals between the chamber base 13 and the chamber cover 14. A hook 16 is provided at the front of the housing 11 to keep the chamber cover 14 closed, and the hook 16 temporarily holds the chamber cover 14 so as not to open. The hooks 16 are used so that the chamber cover 14 does not open the chamber base 13 when the vacuum packaging machine 10 is not used.

  A proximity switch 17 such as a reed switch is provided on the rear upper side of the housing 11 on the rear side of the chamber base 13, and a magnet 18 serving as a detected member of the proximity switch 17 is provided on the rear of the chamber cover 14 There is. When the chamber cover 14 closes and closes the top opening of the chamber base 13, the proximity switch 17 outputs an on signal when the magnet 18 approaches and when the chamber cover 14 opens, the proximity switch 17 separates the magnet 18 The off signal is output by doing.

As shown in FIGS. 1 and 2, a heat sealing device 20 is provided at the front of the chamber 12. The heat sealing device 20 heats and seals the periphery of the tip opening of the heat sealable packaging bag housed in the chamber 12. In addition, the packaging bag uses a thermoplastic resin film of a two-layer structure in which a material having a low melting point is used inside. Heating the sealing device 20 is provided with a lower and upper blocks 21, 22 have an elongated shape and holds the clamping tip opening portion of the packaging bag (clamped), the lower and upper blocks 21, 22 are It extends in the lateral direction at the front of the chamber 12. The lower block body 21 is made of a square pipe member made of aluminum and is provided on the front of the chamber base 13 so as to be removable and vertically movable. A band plate heater 23 made of nichrome material is provided on the upper surface of the lower block body 21. The upper block body 22 is made of elastically deformable silicon, and is provided at the front of the lower surface of the chamber cover 14 at a position facing the upper side of the lower block body 21. Although the heater 23 is provided on the lower block 21, the present invention is not limited to this, and the heater 23 may be provided on the upper block 22 or the upper and lower blocks 21, 22. Good.

  As shown in FIG. 2, at the front of the chamber base 13, a pair of left and right lifting mechanisms 24 (only one is shown in FIG. 2) for moving the lower block body 21 up and down is provided. The lifting mechanism 24 includes a pair of left and right support shafts 25 penetrating the bottom wall of the front of the chamber base 13. The support shafts 25 support the lower block body 21 vertically movably at the front of the chamber base 13. The tip of the support shaft 25 is inserted into the lower portion of the lower block 21, and the support shaft 25 is vertically moved by a pair of elevating cylinders 26 provided at the front of the lower surface of the chamber base 13 at the middle in the vertical direction. It is movably supported. A collar 26a is provided in the elevating cylinder 26 at an intermediate portion of the support shaft 25, and the collar 26a airtightly divides the inside of the elevating cylinder 26 into an upper space 26b and a lower space 26c. A spring 26d is interposed on the outer periphery of the support shaft 25 in the upper space 26b of the elevating cylinder 26, and the spring 26d biases the support shaft 25 downward via the collar 26a.

  As shown in FIG. 2, a suction pipe (suction path) 31 connecting the vacuum pump 30 and the chamber 12 is provided in the housing 11. The vacuum pump 30 is an oil circulation type vacuum pump (oil rotary vacuum pump), and is a positive displacement phase type vacuum pump for reducing the airtightness and ineffective space between components such as a rotor, a stator, and a vane by oil. The suction pipe 31 is provided with a vacuum valve 32. By opening the vacuum valve 32, gas in the chamber 12 can pass to the vacuum pump 30. An external air introduction pipe 33 for introducing external air is connected between the chamber 12 and the vacuum valve 32 to the suction pipe 31. The outside air introduction pipe 33 is composed of a first pipe portion 33a and a second pipe portion 33b branched from the first pipe portion 33a, and the first and second pipe portions 33a, 33b are opened and closed by the first and second pipe portions 33a, 33b. Outside air introduction valves 34, 35 are provided. The first outside air introduction valve 34 is formed to have a larger diameter than the second outside air introduction valve 35, and when the first outside air introduction valve 34 is opened, outside air is introduced quickly into the chamber 12, and the second outside air introduction valve 35 When opened, ambient air is slowly introduced into the chamber 12.

  The pressure detection pipe 36 is connected to the suction pipe 31 via the first pipe portion 33a of the outside air introduction pipe 33, and the pressure detection pipe 36 is provided with a vacuum gauge 37 for detecting the pressure of the chamber 12. When the inside of the chamber 12 is not degassed by the vacuum pump 30, the pressure in the chamber 12 detected by the vacuum gauge 37 is 101 kPa (abs), which is the same as the atmospheric pressure, and the degree of vacuum at this time is 0%. The inside of the chamber 12 is degassed by the vacuum pump 30 to make it underpressure, and when the pressure in the chamber detected by the vacuum gauge 37 is 0 kPa (abs), the degree of vacuum is 100%. Although it is the pressure in the chamber 12 that is directly detected by the vacuum gauge 37, in the following description, the pressure detected by the vacuum gauge 37 is replaced with the degree of vacuum P in the chamber 12 for explanation.

  In the suction pipe 31, a cylinder pipe 38 branched from between the vacuum pump 30 and the vacuum valve 32 is connected to the upper space 26 b of the elevating cylinder 26, and a three-way valve 39 is provided in the cylinder pipe 38. The two ports of the three-way valve 39 are connected to the vacuum pump 30 side of the cylinder tube 38 and the raising and lowering cylinder 26 side, and the remaining one port of the three-way valve 39 is open to the outside air side. Further, a warming up pipe 40 is connected to the suction pipe 31 via a cylinder pipe 38 branched from between the vacuum pump 30 and the vacuum valve 32, and the warming up pipe 40 is opened and closed. A valve 41 is interposed.

  As shown in FIGS. 1 and 2, the vacuum packaging machine 10 is provided with inflation detection means 42 for detecting the inflation of the packaging bag housed in the chamber 12. The bulge detection means 42 is provided with a detection plate (detection member) 43 rotatably supported about a horizontal axis on the lower surface front of the chamber cover 14, and the detection plate 43 In the shape of a strip extending in the The detection plate 43 is disposed on the upper side of the packaging bag housed in the chamber 12 at the rear side of the block members 21 and 22 so that the rear end of the detection plate 43 can move up and down. Is supported on the lower surface of the chamber cover 14. A magnet 44 is provided at the rear end portion at the left end portion which is an end portion in the longitudinal direction of the detection plate 43, and the magnet 44 aims to detect the vertical position of the rear end portion of the detection plate 43 It is a thing. When the packaging bag housed in the chamber 12 is not inflated, the magnet 44 at the rear end of the detection plate 43 is located at the lower portion in the vertical direction in the chamber 12 and after the sensing plate 43 when the packaging bag is inflated. An end magnet 44 is located at the top in the chamber 12.

  On the left side of the housing 11, a position detection sensor 45 comprising a proximity switch such as a reed switch for detecting the vertical position of (the magnet 44 at the rear end of) the detection plate 43 is provided. By detecting the position of the detection plate 43 in the vertical direction, the expansion of the packaging bag is detected. The position detection sensor 45 has a first position detection sensor 45a and a second position detection sensor 45b. The first position detection sensor 45a is located at the lower part outside the chamber 12 at the left side of the housing 11, and is provided at a position opposite to the position when the magnet 44 at the rear end of the detection plate 43 is located at the lowermost position There is. The second position detection sensor 45 b is located on the left side of the housing 11 and at the middle in the vertical direction outside the chamber 12, and the magnet 44 at the rear end of the detection plate 43 rises upward to move the chamber 12 vertically. It is provided at a position opposite to the position slightly above the middle part.

  When the packaging bag in the chamber 12 is not expanded, the magnet 44 at the rear end of the detection plate 43 is located at the lower part in the chamber 12 to face the first position detection sensor 45a (hereinafter simply referred to as the detection plate 43). Is also described in the lower position), and it is possible to detect that the packaging bag is not inflated by the output of the ON signal by the first position detection sensor 45a. In a state where the packaging bag in the chamber 12 is expanded, the magnet 44 at the rear end of the detection plate 43 is at a position facing the second position detection sensor 45b at the middle in the vertical direction in the chamber 12 (hereinafter, The detection plate 43 is also described as being in the middle position), and it is possible to detect that the packaging bag has been inflated by the output of the off signal from the first position detection sensor 45a. When the packaging bag in the chamber 12 is further expanded, the magnet 44 at the rear end of the detection plate 43 is at a position not facing the first and second position detection sensors 45a and 45b at the top in the chamber 12 (hereinafter, It is possible to detect that the packaging bag has further expanded by simply outputting the OFF signals of the first and second position detection sensors 45a and 45b (also described simply as the detection plate 43 is in the upper position).

  As shown in FIG. 3, an operation panel 50 is provided on the front surface of the housing 11, and various operation keys 51 (51 a to 51 d) and display panels 52 (52 a to 52 c) are provided on the operation panel 50. It is done. The "drive" operation key 51a is for making it possible to operate various operation keys 51b to 51d described later. When the "drive" operation key 51a is pressed, the various operation keys 51b to 51d become operable.

  The direct operation keys 51b (51b1 to 51b4) directly select various packaging programs stored in the ROM (storage unit) of the control device 60, which will be described later. Four (multiple) direct operation keys 51b are provided. In this embodiment, the direct operation key (second operation key) 51b1 to which the "hot pack" is attached has a packaging program (packaging program of the second mode) suitable for vacuum-packing an object to be packaged higher than normal temperature. A packaging program (first mode) suitable for vacuum-packing an article to be packaged at ordinary temperature or less on the direct operation keys (first operation keys) 51b2 to 51b4 assigned and having "1" to "3" Packaging program) is assigned.

  The change operation key (third operation key) 51c is used to select the packaging program selected by the direct operation key 51b as another packaging program. In this embodiment, the operation panel 50 is provided with two change operation keys 51c with “∧” and “∨”, and the change operation key 51c with “∧” or “∨” is pressed. When operated, the packaging program stored in order in the ROM (storage unit) of the control device 60 can be changed to forward feed or reverse feed.

  The cancel operation key 51 d is for confirming that the chamber 12 is kept airtight. When the packaging program of the first mode is being executed and the pressing operation of the stop operation key 51d is performed for 3 seconds or longer as an example, the vacuum valve 32 is closed to stop the degassing in the chamber 12 and to execute it. The packaging program in the first mode is temporarily interrupted so that the airtightness in the chamber 12 can be confirmed. The water removal operation key 51 e is an operation key for causing the vacuum pump 30 to drain. When the water removal operation is performed, the vacuum pump 30 is operated so as to degas the inside of the chamber 12. In this water removal operation, it is determined based on the degree of vacuum of the chamber 12 detected by the vacuum gauge 37 whether water mixed in the oil of the vacuum pump 30 has been removed.

  The display panel 52 has a program display unit 52a for displaying the packaging program selected by the direct operation key 51b and the change operation key 51c, and a vacuum degree display unit 52b for displaying the degree of vacuum in the chamber 12 detected by the vacuum gauge 37. And a time display unit 52c for displaying the remaining time until the end of the packaging program. When the packaging program of the first mode is displayed on the program display unit 52a, the program numbers are displayed for "1" to "10" to which the packaging programs of various first modes having different control conditions are assigned, and the program display unit 52a When the two-mode packaging program is displayed, program numbers “H1” to “H2” to which packaging programs of various second modes having different control conditions are assigned are displayed.

  The vacuum packaging machine 10 is provided with a control device 60, and as shown in FIG. 4, this control device 60 includes a proximity switch 17, a heater 23, a vacuum pump 30, a vacuum valve 32, and first and second The external air introduction valves 34 and 35, the vacuum gauge 37, the three-way valve 39, the warming-up valve 41, the first and second position detection sensors 45a and 45b, and the operation panel 50 are connected. The control device 60 includes a microcomputer (not shown), and the microcomputer includes a CPU, a RAM, a ROM, and a timer (all not shown) connected to one another via a bus. The control device 60 is provided with various packaging programs for vacuum-packing the package in the chamber 12 in the ROM, and when the operation panel 50 provided on the front surface of the housing 11 is operated to execute the various packaging programs , Operation of the heater 23, the vacuum pump 30, the vacuum valve 32, the first and second outside air introduction valves 34, 35, and the three-way valve 39 based on the detection of the vacuum gauge 37 and the position detection sensors 45a, 45b, etc. And vacuum package the material in the chamber 12.

  The packaging program stored in the ROM of the control device 60 is the 10 (plural) packaging program of the first mode suitable for the case where the package is at or below normal temperature, and the temperature of the package is higher than the normal temperature When equipped with two (two or more) packaging programs in a second mode suitable. The packaging program of the first mode has 10 types of packaging programs in which the degree of vacuum, the manner of opening the first and second outside air introduction valves 34, 35, and the like are changed in accordance with the material to be packaged. In the second mode of the packaging program, the packaging program for fixing the number of times of in-bag evacuation control is fixed by setting the number of times of in-bag evacuation control for evacuating the air in the packaging bag to one or more predetermined times. And a packaging program capable of controlling the number of times of in-bag evacuation control, wherein the number of times of execution of in-bag evacuation control is variable based on detection of completion of degassing in the packaging bag by a detection program (in-bag degassing detection means).

  The packaging programs of the 10 types (plural types) of the first mode stored in the ROM of the control device 60 are given program numbers of “1” to “10”. When one of the packaging programs in the first mode is selected by the direct operation keys 51b2 to 51b4 and the change operation key 51c is operated, the packaging program in the second mode is selected as the packaging program in the selected first mode The package program of the first mode is stored in the ROM of the control device 60 so that only the other package programs of the first mode can be selected without being locked.

  Specifically, when the packaging program of the first mode with the program number of "1" is selected by the direct operation key 51b2, when the change operation key 51c with the "∨" is operated, "2" A packaging program of the first mode with a program number of “” is selected. Subsequently, when the two change operation keys 51c with “∨” are pressed a plurality of times, “3”, “4”... “10”, “1”, “2”. Only the mode's packaging program is to be selected. Similarly, when the packaging program in the first mode with the program number of "1" is selected by the direct operation key 51b2, pressing the change operation key 51c with "c" a plurality of times, "10 “9”, “8”... “2”, “1”, “10”, “9”... And only the packaging program in the first mode is selected.

  Further, the two types of packaging programs of the second mode stored in the ROM of the control device 60 are given program numbers “H1” to “H2” and one of the packaging programs of the second mode is made by the direct operation key 51b1. When one is selected and the change operation key 51c is operated, the selected second mode packaging program is selected, and only the second mode other packaging program is selected without the first mode packaging program being selected. The second mode of the packaging program is stored in the ROM of the controller 60, as will be possible.

  Specifically, when the packaging program in the second mode with the program number of “H1” is selected by the direct operation key 51b1, when the change operation key 51c with the “∨” is operated, “H2 The second mode packaging program is selected with a program number of "." Subsequently, when the two change operation keys 51c with “∨” are pressed a plurality of times, only the packaging program of the second mode such as “H1”, “H2”, etc. is selected. . Similarly, when the packaging program in the second mode with the program number of "H1" is selected by the direct operation key 51b1, pressing the change operation key 51c with "∧" a plurality of times, "H2 “H1”... And only the second mode packaging program is selected.

  The packaging program of the first and second modes of the vacuum packaging machine 10 will be described with reference to the flowcharts shown in FIGS. As described above, the packaging program of the first mode is a packaging program suitable when the packaged object stored in the packaging bag is at a normal temperature or lower, and the degree of vacuum etc. according to the packaged object stored in the packaging bag The various conditions of have 10 different packaging programs. The 10 types of packaging programs in the first mode generally have only slightly different conditions such as the degree of vacuum, so an example will be described from among the 10 types of packaging programs in the first mode.

  Before executing the packaging program, the vacuum valve 32, the second outside air introduction valve 35, and the warming-up valve 41 are in the closed state, and the three-way valve 39 communicates the elevating cylinder 26 side with the outside air side (vacuum pump 30 Side is closed). Packaged materials such as foodstuffs and food are stored in the packaging bag, and the packaging bag is housed in the chamber 12 so that the opening periphery of the packaging bag is placed on the upper side of the lower block 21. Program display by pressing one of the direct operation keys 51b2 to 51b4 of the operation panel 50 shown in FIG. 3 or operating one of the direct operation keys 51b2 to 51b4 and pressing the change operation key 51c The part 52a is called up with the packaging program of the first mode under the condition suitable for vacuum packaging of the package, and waits for the execution of the packaging program of the first mode.

  As shown in FIG. 5, in step 101, the control device 60 determines whether the on signal is input from the proximity switch 17 and determines whether the chamber cover 14 is closed. When the chamber cover 14 is not closed, the proximity switch 17 outputs the off signal to the controller 60 because the magnet 18 is not close to the proximity switch 17, and the controller 60 determines “NO” in step 101. Execute repeatedly and wait. When the chamber cover 14 is closed and the magnet 18 approaches the proximity switch 17, the proximity switch 17 outputs an ON signal to the controller 60, and the controller 60 determines “YES” in step 101 and proceeds to step 102. . When the controller 60 operates the vacuum pump 30 to open the vacuum valve 32 and close the first outside air introduction valve 34 in step 102, the inside of the chamber 12 is deaerated by the vacuum pump 30 to generate negative pressure. .

  In step 103, the control device 60 repeatedly determines whether or not the degree of vacuum P in the chamber 12 detected by the vacuum gauge 37 is equal to or higher than the degree of vacuum Px specified by the selected first mode packaging program. When the pressure in the chamber 12 gradually decreases and the degree of vacuum P in the chamber 12 detected by the vacuum gauge 37 becomes equal to or higher than the degree of vacuum Px specified by the selected first mode packaging program, the control device 60 At 103, it is determined as “YES”, and the process proceeds to Step 104. In step 104, the controller 60 closes the vacuum valve 32 to stop degassing in the chamber 12 and proceeds to step 105.

In step 105, the control device 60 converts the three-way valve 39 into communication with the elevating cylinder 26 side and the vacuum pump 30 side (closes the outside air side) to make the upper space 26b of the elevating cylinder 26 negative pressure to support the support shaft 25. was elevated to be pressed against the upper block 22 is raised the lower block body 21, clamping causes the opening peripheral edge of the packaging bag and a lower block body 21 and the upper block 22. When the control device 60 causes the heater 23 to generate current by energizing the heater 23 in step 106 where sealing control is performed, the periphery of the opening of the packaging bag is closed by heat welding, and the packaging bag is sealed in a vacuum state.

  In step 107, the control device 60 stops the operation of the vacuum pump 30, and opens the first outside air introduction valve 34, so that the three-way valve 39 communicates with the elevating cylinder 26 side and the outside air side (closes the vacuum pump 30 side). State). The inside of the chamber 12 is not degassed by the vacuum pump 30 and returned to the atmospheric pressure by the outside air introduced from the first outside air introduction valve 34, and the chamber cover 14 is released by the biasing force of the spring member without being evacuated. . Further, external air is introduced into the upper space 26b of the lifting cylinder 26 by bringing the three-way valve 39 into communication with the lifting cylinder 26 side and the outside air side, and the negative pressure state is released, and the support shaft 25 is biased by the spring 26d. The lower block body 21 is separated from the upper block body 22 and the (closed) opening edge of the packaging bag is released from the pinched state from the upper and lower block bodies 21 and 22. The first and second external air introduction valves 34 may be opened and then the first external air introduction valve 34 may be opened according to the control of the 10 (plural) first mode packaging programs. The release of degassing in the chamber 12 may be controlled by controlling the opening of the external air introduction valves 34 and 35. Further, in the following description, the description for raising or lowering the lower block body 21 is the same as the operation of the three-way valve 39 and the elevating cylinder 26 in the steps 105 and 107, so the detailed description is omitted. There is also a case.

  Next, a second mode of packaging program will be described which is suitable when the material to be packaged stored in the packaging bag is higher than normal temperature. As described above, the second mode of the packaging program is a packaging program for fixing the number of times of in-bag evacuation control which fixes the in-bag evacuation control for evacuating air in the packaging bag And a packaging program capable of varying the number of times of in-bag evacuation control, wherein the number of times of execution of the in-bag evacuation control is variable based on detection of completion of degassing in the packaging bag by the detection means). A packaging program with a fixed number of times for controlling the number of times of in-bag evacuation control in the second mode is a packaging program suitable for being executed when a material to be packaged which can reliably discharge the gas from inside the packaging bag is stored in the packaging bag It is a packaging program suitable for vacuum-packing a package with a small amount of liquid, such as hamburger meat, roast beef or boiled with a small amount of juice as an example of the package. The packaging program with variable number of times of in-bag evacuation control in the second mode is a packaging program suitable for being executed when a package to which it is difficult to know how much gas is contained is stored in a packaging bag. It is a packaging program suitable for vacuum-packing a package with a large amount of liquid such as stew or soup as an example of the product.

  First, the packaging program for fixing the number of times of in-bag evacuation control in the second mode will be described. Before executing the second mode packaging program, the vacuum valve 32, the second outside air introduction valve 35, and the warming-up valve 41 are in the closed state as in the first mode packaging program. The three-way valve 39 is in a state of communication between the elevating cylinder 26 side and the outside air side (the vacuum pump 30 side is closed). Packaged materials such as foodstuffs and food are stored in the packaging bag, and the packaging bag is housed in the chamber 12 so that the opening periphery of the packaging bag is placed on the upper side of the lower block 21. Pressing the direct operation key 51b1 of the operation panel 50 shown in FIG. 3 calls the packaging display program with the fixed number of in-bag evacuation control times in the second mode to the program display unit 52a, and the number of times of in-bag evacuation control in the second mode fixed Wait for the execution of the packaging program.

  As shown in FIG. 6, in step 201, the control device 60 determines whether or not the on signal is input from the proximity switch 17, and determines whether or not the chamber cover 14 is closed. When the chamber cover 14 is not closed, the proximity switch 17 outputs the off signal to the controller 60 because the magnet 18 is not close to the proximity switch 17, and the controller 60 repeats “NO” in step 201. judge. When the chamber cover 14 is closed and the magnet 18 approaches the proximity switch 17 while the controller 60 repeatedly executes the process of step 201, the proximity switch 17 outputs an ON signal to the controller 60, and the controller In step 201, it is determined “YES” in step 201, and the process proceeds to step 202.

  If an excessive amount of material is contained in the packaging bag contained in the chamber 12, the detection plate 43 is at the middle position and the upper position before the inside of the chamber 12 is degassed and negative pressured. May be located. When the detection plate 43 is positioned at the middle position or the upper position, the expansion detection means 42 may not be able to detect the expansion of the packaging bag when the inside of the chamber 12 is deaerated and negative pressure is generated. Therefore, in step 202, the control device 60 determines whether the detection plate 43 is at the lower position by determining whether the on signal is input from the first position detection sensor 45a. If the ON signal is not input from the first position detection sensor 45a, the control device 60 determines "NO" in step 202, and an error is generated in the program display unit 52a or the time display unit 52c of the display panel 52 in step 203. Is displayed and the process returns to step 201. The control device 60 may notify of an error by a sound such as a buzzer instead of the display of the error in step 203. On the other hand, when the appropriate amount of the package is stored in the packaging bag (the excess amount of the package is not stored in the packaging bag), the ON signal is output from the first position detection sensor 45a. As a result, the controller 60 determines “YES” in step 202 and proceeds to step 204. In step 204, the control device 60 sets the number of times of execution of in-bag evacuation control R described later to 0, and advances to in-chamber deaeration control starting from step 205.

In step 205, the control device 60 operates the vacuum pump 30, opens the vacuum valve 32, closes the first outside air introduction valve 34, and at the same time, the three-way valve 39 on the elevating cylinder 26 side and the vacuum pump 30 side. Are in the communication state (the outside air side is in the closed state). The inside of the chamber 12 is deaerated by the vacuum pump 30 to be negative pressure. Further, the upper space 26b of the elevating cylinder 26 is also made negative pressure, the support shaft 25 is raised, the lower block 21 is raised and pressed against the upper block 22, and the peripheral edge of the opening of the packaging bag is the lower block The opening of the packaging bag is temporarily closed by being pinched by the upper block body 21 and the upper block body 22.

  When the opening of the packaging bag in the chamber 12 is temporarily closed by the process of step 205, the inside of the chamber 12 is deaerated and negatively pressurized, and the controller 60 sets the first position in step 206 to a first position. The detection plate 43 is at the middle position or the upper position based on the presence or absence of the input of the off signal from the detection sensor 45a or the input of the off signal from the first and second position detection sensors 45a and 45b, ie, the packaging bag is It is determined whether it has expanded. The controller 60 repeatedly executes the determination of “NO” in step 206 until the packaging bag is expanded until the detection plate 43 is pushed up to the middle position or the upper position. The packaging bag pushes up the detection plate 43 to the middle position or the upper position by the negative pressure in the chamber 12, and the controller 60 receives an off signal from the first position detection sensor 45a, or the first and second position detection sensors. When an off signal is input from 45a and 45b, the control device 60 determines “YES” in step 206 and proceeds to step 207.

  In step 207, the controller 60 closes the vacuum valve 32 to temporarily interrupt degassing in the chamber 12, and stores the degree of vacuum P detected by the vacuum gauge 37 in the RAM. Next, in step 208, the control device 60 determines whether the in-bag evacuation control to be described below has been executed five times or more. If the in-bag evacuation control has not been performed five times or more, the control device 60 determines “NO” to execute the in-bag evacuation control starting from step 209.

  In step 209, the control device 60 lowers the lower block body 21 by bringing the three-way valve 39 into communication with the elevating cylinder 26 side and the outside air side (vacuum pump 30 side closed). By lowering the lower block body 21, the opening of the packaging bag is opened, and the gas filled in the packaging bag is discharged into the chamber 12. The controller 60 opens the vacuum valve 32 for an additional time in step 210, further discharges the internal gas from the opening of the packaging bag, and waits for 5 seconds in step 211. The opening at the additional time of the vacuum valve 32 in this step 210 can be set to 0 seconds, that is, even when the vacuum valve 32 is not opened, the degassing time suitable for the package can be set. That is, if the material to be packaged contains a large amount of liquid liable to be blown out of the packaging bag, it is preferable to set the opening time of the vacuum valve 32 for an additional time to a very short time of about 0 seconds or 1 to 2 seconds, If the material to be packaged is a liquid which is less likely to be spilled out of the packaging bag, it is preferable to set the open time of the vacuum valve 32 for an additional time to a short time of about 3 to 5 seconds. Next, in step 212, the control device 60 adds 1 to the number of executions R as the number of executions of in-bag evacuation control R = R + 1, and proceeds to step 213.

  The controller 60 executes in-chamber intake control so as to temporarily intake air into the chamber 12 at step 213. The in-chamber intake control is intended to prevent the inability to detect the expansion of the packaging bag in the subsequent processing if the packaged material is in a boiling state in the packaging bag, and the chamber 12 External air is introduced inside to reduce the degree of vacuum. The control device 60 performs this in-chamber intake control at step 213. The predetermined first degree of vacuum lower than the degree of vacuum P detected at step 207 is 10% from the degree of vacuum P (10% is an example, The second outside air introduction valve 35 is opened to a reduced value (not limited to this) to introduce outside air into the chamber 12.

  When the first vacuum degree is lower than the lower limit (for example, 30%) in step 213 of performing in-chamber intake control, the second outside air introduction valve 35 is opened to the lower limit to introduce outside air into the chamber 12. Control to do so. The lower limit value is set to the first degree of vacuum, for example, in order to prevent the chamber cover 14 from being opened without being suctioned negative pressure while the packaging program is being executed.

  In step 214, the controller 60 opens the vacuum valve 32, degassing the inside of the chamber 12 to the degree of vacuum P detected and stored in the RAM at the timing of step 207. Since the degree of vacuum P detected at the timing of step 207 is the degree of vacuum until the packaged material in the packaging bag is inflated to such an extent that the material in the packaging bag will not be blown out, detection is made in step 207 with the packaging bag opened. Even if the inside of the chamber 12 is degassed to the vacuum degree P, the material in the packaging bag will not be blown out. Although the inside of the chamber 12 is deaerated until the degree of vacuum P detected and stored in the RAM at the timing of the step 207 in the step 214, the invention is not limited thereto. The inside of the chamber 12 may be degassed to a degree of vacuum P-5% obtained by subtracting a degree of vacuum of, for example, 5% as a predetermined value from the degree of vacuum P stored therein. In this case, since the inside of the chamber 12 is decompressed only to a vacuum degree P-5% lower than the vacuum degree P described above, it is possible to ensure that a sudden boil over of the material in the packaging bag does not occur. .

After the processing of step 214, the control device 60 returns to step 205 and lifts the lower block 21 and presses it against the upper block 22 so that the periphery of the opening of the packaging bag is the lower block 21 and the upper block 22. It is not an opening of the packaging bag again temporarily closed sandwiched between. After the processing of step 214, the vacuum pump 30 is in operation, the vacuum valve 32 is opened, and the first outside air introduction valve 34 is closed. Continuously operating, the vacuum valve 32 is opened and the first outside air introduction valve 34 remains closed. After returning from step 214 to step 205, the control device 60 repeatedly executes the processing of steps 205 to 215 so that the number of times of execution of the in-bag evacuation control of steps 210 to 215 is five or more.

When the in-bag evacuation control has been performed five times, the control device 60 determines “YES” in step 208 and proceeds to step 215. The controller 60 lowers the lower block body 21 in step 215 as the final in-bag evacuation control, and waits for 5 seconds in step 216 to discharge the gas remaining in the packaging bag. In step 217, the control device 60 raises the lower block body 21 until it is pressed against the upper block body 22, and the peripheral edge of the opening of the packaging bag is sandwiched by the lower block body 21 and the upper block body 22 Close the opening of. At step 218 where sealing control is performed, the control device 60 energizes the heater 23 to seal the periphery of the opening of the packaging bag by heat welding to seal the packaging bag. In step 219, the control device 60 stops the operation of the vacuum pump 30, and releases the negative pressure state in the chamber 12 by opening the first outside air introduction valve 34, and lowers the lower block body 21. Then, the packaging program with the number of times of in-bag evacuation control fixed in the second mode is fixed.

  Next, the packaging program with variable number of times of in-bag evacuation control in the second mode will be described. Before executing the second mode packaging program, the vacuum valve 32, the second outside air introduction valve 35, and the warming-up valve 41 are in the closed state as in the first mode packaging program. The three-way valve 39 is in a state of communication between the elevating cylinder 26 side and the outside air side (the vacuum pump 30 side is closed). Packaged materials such as foodstuffs and food are stored in the packaging bag, and the packaging bag is housed in the chamber 12 so that the opening periphery of the packaging bag is placed on the upper side of the lower block 21. Pressing the direct operation key 51b1 and the change operation key 51c of the operation panel 50 shown in FIG. 3 to call the packaging program with variable number of times of in-bag evacuation control in the second mode to the program display unit 52a The execution of the packaging program with variable number of times of in-bag evacuation control is put on standby.

  In step 301, the controller 60 determines whether the on signal is input from the proximity switch 17, and determines whether the chamber cover 14 is closed. When the chamber cover 14 is not closed, the proximity switch 17 outputs the off signal to the controller 60 because the magnet 18 is not close to the proximity switch 17, and the controller 60 repeats “NO” in step 301. judge. When the chamber cover 14 is closed and the magnet 18 approaches the proximity switch 17 while the controller 60 repeatedly executes the process of step 301, the proximity switch 17 outputs an ON signal to the controller 60, and the controller At step 301, it is judged as "YES" at step 301, and the process proceeds to step 302.

  If an excessive amount of material is contained in the packaging bag contained in the chamber 12, the detection plate 43 is at the middle position and the upper position before the inside of the chamber 12 is degassed and negative pressured. May be located. When the detection plate 43 is positioned at the middle position or the upper position, the expansion detection means 42 may not be able to detect the expansion of the packaging bag when the inside of the chamber 12 is deaerated and negative pressure is generated. Therefore, in step 302, the control device 60 determines whether the detection plate 43 is at the lower position by determining whether the on signal is input from the first position detection sensor 45a. If the ON signal is not input from the first position detection sensor 45a, the control device 60 determines “NO” in step 302, and an error is generated in the program display unit 52a or the time display unit 52c of the display panel 52 in step 303. Make the display of. After the processing of step 303, the control device 60 returns to step 301. The control device 60 may notify of an error by a sound such as a buzzer instead of the display of the error in step 303. On the other hand, when the appropriate amount of the package is stored in the packaging bag (the excess amount of the package is not stored in the packaging bag), the ON signal is output from the first position detection sensor 45a. As it is input, the controller 60 determines “YES” in step 302 and proceeds to in-chamber deaeration control starting from step 304.

In step 304, the control device 60 operates the vacuum pump 30, opens the vacuum valve 32, closes the first outside air introduction valve 34, and at the same time, the three-way valve 39 on the elevating cylinder 26 side and the vacuum pump 30 side. Are in the communication state (the outside air side is in the closed state). The inside of the chamber 12 is deaerated by the vacuum pump 30 to be negative pressure. Further, the upper space 26b of the elevating cylinder 26 is also made negative pressure, the support shaft 25 is raised, the lower block 21 is raised and pressed against the upper block 22, and the peripheral edge of the opening of the packaging bag is the lower block The opening of the packaging bag is temporarily closed by being pinched by the upper block body 21 and the upper block body 22.

  When the processing of step 304 temporarily degasses the inside of the chamber 12 with negative pressure while the opening of the packaging bag in the chamber 12 is temporarily closed, in step 305, the control device 60 performs the first position. Based on the presence / absence of the input of the off signal from the detection sensor 45a, it is determined whether the detection plate 43 is in the middle position, that is, whether the packaging bag has expanded. The control device 60 repeatedly executes “NO” determination in step 305 until the packaging bag is expanded until the detection plate 43 is pushed up to the middle position. When the packaging bag pushes up the detection plate 43 to the middle position due to the negative pressure in the chamber 12 and the control device 60 receives an off signal from the first position detection sensor 45 a, the control device 60 sets “Step 305” The determination is “YES”, and the process proceeds to step 306.

  In step 306, the controller 60 closes the vacuum valve 32 to temporarily interrupt degassing in the chamber 12, and stores the degree of vacuum P detected by the vacuum gauge 37 in the RAM.

  Next, in step 307, the control device 60 determines whether or not degassing of the packaging bag has been completed by the in-bag degassing detection program (in-bag degassing detection means). The control device 60 sets the detection plate 43 in the lower position (the packaging bag is in the first state) to the middle position (the packaging bag is in the second state) in the step 305 as the degassing detection means in the step 307. Degassing in the packaging bag is completed by determining whether or not the detection plate 43 has reached the upper position (the packaging bag is in the third state) within 0.5 seconds as the predetermined time after closing the vacuum valve 32. It is determined whether or not it has. When the inside of the packaging bag is not sufficiently degassed, the closed packaging bag is expanded by the expansion of the internal gas with the negative pressure of the chamber 12, and the packaging bag is in such a degree that the detection plate 43 is at the middle position. If the degassing in the chamber 12 is interrupted when the pressure in the chamber 12 is inflated, the pressure in the chamber 12 is kept constant, so that the packaging bag can no longer inflate and the detection plate 43 can not be pushed up to the upper position. On the other hand, when the inside of the packaging bag is sufficiently degassed, the closed packaging bag is expanded by negative pressure in the chamber 12 and water vapor contained in the package is evaporated, and the detection plate 43 is Even if the degassing in the chamber 12 is interrupted when the packaging bag is inflated to an intermediate position, the evaporation of the water contained in the package does not immediately settle, and the detection bag 43 continues to expand the packaging bag. Push up to the upper position.

  If the inside of the packaging bag can not be sufficiently deaerated, the detection plate 43 is in the middle position in step 305 and the vacuum valve 32 is closed in step 306 after the detection plate 43 is within 0.5 seconds as the predetermined time. Since the second position detection sensor 45b continues to input an ON signal to the control device 60, the control device 60 determines “NO” in step 307 and proceeds to step In-bag evacuation control starting at 308 is performed. It should be noted that it is determined that "YES" is determined in step 307 by erroneously detecting that the detection plate 43 is pushed up to the upper position within 0.5 seconds without executing the in-bag evacuation control even once. In order to prevent this, before or after the process of step 307, it may be determined whether the in-bag evacuation control has been performed once (or twice) or more.

  In step 308, the control device 60 lowers the lower block body 21 by bringing the three-way valve 39 into communication with the elevating cylinder 26 side and the outside air side (vacuum pump 30 side closed). By lowering the lower block body 21, the opening of the packaging bag is opened, and the gas filled in the packaging bag is discharged into the chamber 12. The controller 60 opens the vacuum valve 32 for an additional time in step 309, further discharges the internal gas from the opening of the packaging bag, and waits for 5 seconds in step 310. The opening at the additional time of the vacuum valve 32 in this step 309 is 0 seconds, that is, even when the vacuum valve 32 is not opened, the degassing time suitable for the package can be set. That is, if the material to be packaged contains a large amount of liquid liable to be blown out of the packaging bag, it is preferable to set the opening time of the vacuum valve 32 for an additional time to a very short time of about 0 seconds or 1 to 2 seconds, If the package has less liquid which is difficult to spill out of the packaging bag, it is preferable to set the opening time of the additional time of the vacuum valve 32 to a short time of about 3 to 5 seconds.

  The controller 60 executes in-chamber intake control so as to temporarily intake air into the chamber 12 at step 311. The in-chamber intake control is intended to prevent the inability to detect the expansion of the packaging bag in the subsequent processing if the packaged material is in a boiling state in the packaging bag, and the chamber 12 External air is introduced inside to reduce the degree of vacuum. The controller 60 executes step S311 for performing in-chamber intake control, and the predetermined degree of vacuum lower than the degree of vacuum P detected in step 306 is 10% from the degree of vacuum P (10% is an example, The second outside air introduction valve 35 is opened to a reduced value (not limited to this) to introduce outside air into the chamber 12.

  When the first vacuum degree is equal to or less than the lower limit (for example, 30%) in step 311 for performing in-chamber intake control, the second outside air introduction valve 35 is opened to the lower limit to introduce outside air into the chamber 12. Control to do so. The lower limit value is set to the first degree of vacuum, for example, in order to prevent the chamber cover 14 from being opened without being suctioned negative pressure while the packaging program is being executed.

  In step 312, the controller 60 opens the vacuum valve 32, degassing the inside of the chamber 12 to the degree of vacuum P detected and stored in the RAM at the timing of step 306. Since the degree of vacuum P detected at the timing of step 306 is the degree of vacuum until the package in the packaging bag is inflated to the extent that the material in the packaging bag is not blown out, the detection is made in step 306 with the packaging bag open. Even if the inside of the chamber 12 is degassed to the vacuum degree P, the material in the packaging bag will not be blown out. Although the inside of the chamber 12 is deaerated to the degree of vacuum P detected and stored in the RAM at the timing of the step 306 in the step 312, the present invention is not limited to this. The inside of the chamber 12 may be deaerated to a degree of vacuum P-5% obtained by subtracting a degree of vacuum of, for example, 5% as a predetermined value from the degree of vacuum P stored. In this case, since the inside of the chamber 12 is decompressed only to a vacuum degree P-5% lower than the vacuum degree P described above, it is possible to ensure that a sudden boil over of the material in the packaging bag does not occur. .

After the processing of step 312, the control device 60 returns to step 304, lifts the lower block 21 and presses it against the upper block 22, and the peripheral edge of the opening of the packaging bag is the lower block 21 and the upper block 22. It is not an opening of the packaging bag again temporarily closed sandwiched between. Since the vacuum pump 30 is in operation after the processing of step 312, the vacuum valve 32 is opened, and the first outside air introduction valve 34 is closed, the vacuum pump 30 is also returned when returning to step 304. Continuously operating, the vacuum valve 32 is opened and the first outside air introduction valve 34 remains closed. After returning from step 312 to step 304, the control device 60 determines in step 307 whether or not degassing of the packaging bag by the degassing detection program in the bag is completed, and degassing of the packaging bag is completed. If not, the in-bag evacuation control of steps 308 to 312 is executed.

  If the inside of the packaging bag can be sufficiently degassed while performing the processing of steps 304 to 312, the detection plate 43 detects the middle position at step 305 and immediately (within 0.5 seconds) the upper position. It will be pushed up. At this time, the on signal input from the second position detection sensor 45b is changed to the off signal of the first and second position detection sensors 45a and 45b within 0.5 seconds and is input to the control device 60. The controller 60 determines “YES” in step 307 and proceeds to step 313.

The controller 60 lowers the lower block body 21 in step 313 as the final in-bag evacuation control, and waits for 5 seconds in step 314 to discharge the gas remaining in the packaging bag. In step 315, the control device 60 raises the lower block body 21 until it is pressed against the upper block body 22, and the peripheral edge of the opening of the packaging bag is sandwiched by the lower block body 21 and the upper block body 22 Close the opening of. In step 316 where sealing control is performed, the control device 60 energizes the heater 23 to seal the periphery of the opening of the packaging bag by heat welding to seal the packaging bag. In step 317, the controller 60 stops the operation of the vacuum pump 30, and releases the negative pressure state in the chamber 12 by opening the first outside air introduction valve 34, and lowers the lower block body 21. Then, the packaging program with variable number of times of in-bag evacuation control in the second mode is ended.

  In the vacuum packaging machine 10 configured as described above, one packaging program is selected and operated from the plurality of (10) packaging programs in the first mode and the plurality (2) packaging programs in the second mode. The operation panel 50 having the operation key 51 is provided, and the operation key 51 includes direct operation keys (first operation keys) 51b2 to 51b4 for directly selecting one of the plurality of packaging programs in the first mode, and a plurality of second modes And a direct operation key (second operation key) 51b1 for directly selecting one of the programs. As a result, the packaging program in the first or second mode can be selected by one operation, and the operability when selecting and executing the packaging program in the vacuum packaging machine 10 is improved.

  In addition, in the operation panel 50, the packaging program of the first mode selected by the direct operation keys (first operation keys) 51b2 to 51b4 can be selected as another packaging program of the first mode, or the direct operation keys (second Operation key) A change operation key (third operation key) 51c is provided, which allows the packaging program in the second mode selected by the operation 51b1 to be selectable to another packaging program in the second mode. When the change operation key 51c is operated, the first mode packaging program selected by the direct operation keys (first operation keys) 51b2 to 51b4 is selected without the second mode packaging program being selected. A plurality of packaging programs of the first mode are stored in the ROM of the control device 60 so that only other packaging programs of the mode can be selected. Also, it is possible to select only the other packaging program of the second mode without selecting the packaging program of the first mode, with the packaging program of the second mode selected by the direct operation key (second operation key) 51b1. As a result, the plurality of packaging programs in the second mode are stored in the control device 60. Thus, after one of the packaging programs in the first mode is selected by the direct operation keys (first operation keys) 51b2 to 51b4, the change operation key (third operation key) 51c is pressed and operated many times. There is no need to select the packaging program in the second mode, and it is possible to select one of the packaging programs in the first mode or one of the packaging programs in the second mode with as few operations as possible.

In the vacuum packaging machine 10 configured as described above, by raising the lower block body 21 to a position pressing the upper block body 22, the peripheral edge of the opening of the packaging bag is moved to the lower and upper block bodies 21. Although was held between 22, the present invention is not limited thereto, by lowering the upper block body 22 to a position to press the lower side of the block body 21, the lower the opening portion of the packaging bag It may be pinched by the side and the upper block bodies 21 and 22, or by raising the lower block body 21 and lowering the upper block body 22, the peripheral edge of the opening of the packaging bag is on the lower side and the upper side and the block body 21, 22 may be sandwiched by.

  In the vacuum packaging machine 10 configured as described above, a detection plate 43 supported in the chamber 12 on the lower surface of the chamber cover 14 so as to be rotatable about a horizontal axis is provided as expansion detection means for detecting expansion of the packaging bag. The expansion of the packaging bag is detected by detecting the magnet 44 at the rear end of the detection plate 43 which is raised by the expansion of the packaging bag by the position detection sensor 45. The present invention is not limited to this, and a detection bar formed of a rod-like member supported on the lower surface of the chamber cover 14 so as to move up and down on the upper side of the packaging bag is provided in the chamber 12. The swelling of the packaging bag may be detected by detecting a magnet provided at the end of the bar with a position detection sensor. In addition, as another swelling detection means, a light emitting unit that emits light passing through a position blocked by the expanded packaging bag above the expanded packaging bag in the chamber 12 and a light receiving unit that receives the light of the light emitting section An optical sensor may be provided, and the expansion of the packaging bag may be detected based on the detection result of the optical sensor.

 DESCRIPTION OF SYMBOLS 10 ... Vacuum packaging machine, 12 ... Chamber, 21, 22 ... Block body, 23 ... Heater, 30 ... Vacuum pump, 50 ... Operation panel, 51 ... Operation key, 51b1-51b3 ... 1st operation key (direct operation key), 51b4 ... 2nd operation key (direct operation key), 51c ... 3rd operation key (change operation key), 60 ... control device.

Claims (2)

A chamber for containing a packaging bag containing articles to be packaged;
At least one of the upper and lower sides is supported so as to be movable up and down in the chamber, and an upper and lower block body is closed by clamping the peripheral edge of the opening of the packaging bag from the upper and lower sides;
A heater provided on at least one of the upper and lower block bodies for heating and welding the peripheral edge of the opening of the packaging bag;
A vacuum pump for degassing the chamber and producing a negative pressure;
After drained gas in said packaging bag accommodated in said chamber by negative pressure of the chamber by the operation of the vacuum pump, the opening portion of the packaging bag is sandwiched by the upper and lower block member And closing the periphery of the opening of the packaging bag by heating and welding by actuation of the heater; a plurality of packaging programs of a first mode suitable when the package is at a normal temperature or less; and actuation of the vacuum pump The interior of the chamber is made negative pressure by this, and the peripheral edge of the opening of the packaging bag in the negative pressure state is moved from the closed state by moving the upper and lower block members up and down to open the packaging bag the gas bag in the exhaust control for discharging the inner after executing one or more times to close the opening portion of the packaging bag by sandwiching by the upper and lower block body, depending on the operation of the heater Vacuum packing machine having a control device for sealing the periphery of the opening of the packaging bag by heating and welding, and storing a plurality of packaging programs of a second mode suitable when the temperature of the package is higher than normal temperature And
It has an operation panel having an operation key for selecting one of the plurality of packaging programs in the first mode and the plurality of packaging programs in the second mode by a pressing operation, the operation key being the a first operation key for selecting directly by 1 mode of the pressing operation of one of a plurality of packaging programs, and a second operation key for selecting directly by pressing operation of one of said second mode a plurality of packaging programs The vacuum packaging machine characterized by having. In the vacuum packaging machine according to claim 1,
Wherein the operation panel can select other packaging program of the first mode by pressing the operation of the packaging program of the first mode selected by pushing manipulation of the first operation key or said second operation key and a third operation key that can be selected in addition to the packaging program of the second mode of the selected second mode of packaging a program by pressing operation by the pressing operation of,
The packaging program of the first mode selected by the first operation key when the pressing operation is performed by the third operation key, the packaging program of the second mode is not selected, and the first mode is selected. Storing the plurality of packaging programs in the first mode in the control device so that only the other packaging programs can be selected.
The packaging program of the second mode selected by the second operation key when the pressing operation is performed by the third operation key is the second mode without the packaging program of the first mode being selected A plurality of packaging programs of the second mode are stored in the control device so that only other packaging programs can be selected.

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