JP2019108156A - Vacuum packaging machine - Google Patents

Abstract

To prevent oil contained in the exhaust of a rotary vacuum pump from adhering to other machine part inside the casing of a vacuum packaging machine and from scattering outside of the casing.SOLUTION: A vacuum packaging machine 10 includes a chamber 20 in an upper part of a casing 11, a sealing device 30 provided in the chamber 20, and an oil circulation type oil rotary vacuum pump 40 provided under the casing 11 for degassing the chamber 20 to make it under negative pressure, the lower part of the casing 11 has an exhaust passage 60a for passing the exhaust released from the exhaust port 40a of the oil rotary vacuum pump 40, and an oil catch duct 60 for collecting oil by causing oil contained in the exhaust passing through the exhaust passage 60a to adhere to the inner wall surface was provided.SELECTED DRAWING: Figure 2

Description

  In the present invention, the inside of the packaging bag is degassed by degassing the inside of the chamber with an oil rotary vacuum pump to make it under negative pressure, and sealing the periphery of the opening of the packaging bag housed in the chamber with a sealing device. The present invention relates to a vacuum packaging machine that seals in a state.

  Patent Document 1 listed below discloses a vacuum packaging machine for vacuum-packing a packaging bag in which articles to be packaged such as food and food are stored. The vacuum packaging machine comprises: a chamber formed of a chamber base and a chamber cover at the top of the casing; a heat sealing device provided in the chamber to seal the opening periphery of the packaging bag by heat welding; And an oil-circulating oil rotary vacuum pump for degassing the chamber to make it under negative pressure. In this vacuum packaging machine, the inside of the packaging bag is evacuated by degassing the inside of the chamber with an oil rotary vacuum pump to make it under negative pressure, and sealing the periphery of the opening of the packaging bag housed in the chamber by the heat sealing device. Is sealed in a deaerated condition.

Japanese Patent Application Laid-Open No. 2002-019723

  In the vacuum packaging machine as described above, when the inside of the chamber is deaerated and made negative by the oil rotary vacuum pump, the exhaust is released from the exhaust port of the oil rotary vacuum pump into the casing. Since the discharged exhaust contains oil in the form of mist, oil contained in the exhaust may adhere to other mechanical parts in the casing, and a vacuum packing machine to be outside the casing is installed. There is a risk of scattering in the kitchen etc. An object of the present invention is to make it difficult for oil contained in the exhaust of the oil rotary vacuum pump to adhere to other mechanical parts inside the casing of the vacuum packaging machine and to make the oil hard to scatter outside the casing.

  In order to solve the above-mentioned problems, the present invention is provided in the upper part of the casing, in a chamber for accommodating the packaging bag containing the package, and in the chamber for sealing the periphery of the opening of the packaging bag Sealing device for sealing the packaging bag, and an oil-circulating oil rotary vacuum pump provided at the lower part of the casing to degas the chamber to make it underpressure, and the chamber is evacuated by the oil rotary vacuum pump A vacuum packing machine for sealing the inside of the packaging bag in a deaerated state by sealing the periphery of the opening of the packaging bag housed in the chamber with a sealing device, comprising: The lower part has an exhaust passage that passes the exhaust released from the exhaust port of the oil rotary vacuum pump, and an oil catch duct that collects oil contained in the exhaust passing through the exhaust passage by adhering it to the inner wall surface. Provided There is provided a vacuum packaging machine according to claim.

  In the vacuum packaging machine configured as described above, the lower part of the casing has an exhaust passage for passing the exhaust released from the exhaust port of the oil rotary vacuum pump, and the oil contained in the exhaust passing through the exhaust passage is Since an oil catch duct is provided to collect by adhering to the wall surface of the oil, the oil contained in the exhaust gas discharged from the oil rotary vacuum pump adheres to the inner wall surface of the oil catch duct and the inside of the casing It has not been released.

  In the vacuum packaging machine configured as described above, it is preferable to provide an oil reservoir for storing the collected oil at the bottom of the oil catch duct. In this case, the oil collected in the oil catch duct is accumulated in the oil storage portion, and the oil collected by the oil catch duct is less likely to leak to the outside. Further, in the vacuum packaging machine configured as described above, it is preferable that an oil outlet be provided at the lower part of the oil reservoir, and an oil plug be removably attached to the oil outlet. In this case, the oil can be discharged from the oil outlet by removing the oil drain plug, and the maintenance workability can be enhanced.

  In the vacuum packaging machine configured as described above, it is preferable to provide a partition plate for lengthening the exhaust passage by partitioning the internal space in the oil catch duct. In this case, the exhaust passage in the oil catch duct can be lengthened, and the collection efficiency of oil contained in the exhaust passing through the exhaust passage can be increased. In the vacuum packaging machine configured as described above, it is preferable to arrange the partition plate so as to extend up and down above the storage section. In this case, the oil adhering to the partition plate flows down to the oil reservoir, making it difficult for the oil to leak from the oil catch duct. Furthermore, in the vacuum packaging machine configured as described above, it is preferable to project the central portion in the width direction of the partition plate downward. In this case, since the oil flowing down the partition plate gathers and drops at the central portion in the width direction, the oil flowing down the partition plate can be easily recovered by the oil reservoir.

  In another embodiment of the vacuum packaging machine, at least one side wall of the oil catch duct is disposed to extend vertically above the oil reservoir, and the lower end of the at least one side wall is directed obliquely upward. It is also possible to provide an inclined portion that inclines to. In this case, the oil flowing down at least one side wall of the oil catch duct can be easily dropped onto the oil reservoir, and the oil collected by the oil catch duct can be easily recovered by the oil reservoir.

  Moreover, in still another embodiment of the vacuum packaging machine, it is preferable to incline the bottom wall of the oil catch duct obliquely upward from the position where the exhaust port is formed. In this case, the oil collected in the oil catch duct flows through the bottom wall and returns from the exhaust port to the oil rotary vacuum pump, so that it is not necessary to recover the oil from the oil catch duct.

  In still another embodiment of the vacuum packaging machine, the exhaust port of the oil rotary vacuum pump is disposed to open upward, and a box-shaped oil catch duct having a connection port at the bottom wall is connected to the exhaust port. The air outlet may be formed on the side wall of the box-shaped oil catch duct. In the vacuum packaging machine configured as described above, it is preferable to incline the bottom wall of the box-shaped oil catch duct so that the connection port becomes lower. In this case, the oil accumulated on the bottom wall of the box-shaped oil catch duct flows from the connection port into the exhaust port of the oil rotary vacuum pump and returns.

  Further, in the vacuum packaging machine configured as described above, it is preferable to detachably attach the oil catch duct to the casing or the oil rotary vacuum pump. In this case, the oil catch duct can be removed to recover the oil collected inside, and the inside of the oil catch duct can be easily cleaned.

  Moreover, in the vacuum packaging machine comprised as mentioned above, it is preferable to arrange the filter which collects oil in the inside of an oil catch duct. In this case, the oil collection efficiency of the oil catch duct can be further enhanced.

It is a perspective view showing an embodiment of a vacuum packing machine of the present invention. It is the longitudinal direction sectional view which looked at the vacuum packing machine from the diagonal back which cut the right-hand side part along the direction of the front and back except machine parts. It is the schematic of a vacuum packaging machine. It is the perspective view seen from diagonally back when the oil catch duct is attached to the rear surface of an oil rotary vacuum pump. It is the disassembled perspective view seen from diagonally back which shows the oil catch duct of the vacuum packaging machine of 2nd Embodiment. It is a vacuum packaging machine of a 2nd embodiment, and is a longitudinal direction sectional view which met in the direction of order of a state where an oil storage plug was attached to an oil storage part of an oil catch duct. The vacuum packaging machine of 2nd Embodiment WHEREIN: It is a longitudinal direction sectional view along the left-right direction when the left-right-both-sides wall of an oil catch duct is arrange | positioned above the oil storage part. It is the disassembled perspective view seen from diagonally back which shows the oil catch duct of the vacuum packaging machine of 3rd Embodiment. FIG. 9 is a longitudinal cross-sectional view along the front-rear direction of FIG. 8; It is a disassembled perspective view corresponded in FIG. 8 when the center part of the width direction of a partition plate is made to protrude below. It is a longitudinal cross-sectional view along the front-back direction which shows the oil catch duct of the vacuum packaging machine of 4th Embodiment. It is a perspective view showing the oil catch duct of a vacuum packaging machine of a 5th embodiment omitting a top wall.

  Hereinafter, an embodiment of a vacuum packaging machine of the present invention will be described with reference to the attached drawings. As shown in FIGS. 1 to 3, the vacuum packaging machine 10 according to the first embodiment is provided on the upper part of the casing 11 and includes a chamber 20 for accommodating a packaging bag containing articles to be packaged such as food, and a chamber 20. A heat sealing device (sealing device) 30 for sealing the periphery of the opening of the packaging bag inside, and an oil circulating oil for degassing the inside of the chamber 20 into the machine chamber 14 at the lower part of the casing 11 A rotary vacuum pump 40 is provided.

  As shown in FIG. 2, the casing 11 includes a base plate 12 constituting a bottom wall, and a peripheral wall 13 constituting front, rear and left and right side walls. The lower part of the casing 11 is a machine room 14 in which the oil rotary vacuum pump 40 and the like are disposed on the upper side of the base plate 12, and the upper side of the base plate 12 is closed by the chamber 20.

  The chamber 20 is a pressure-resistant container composed of a shallow dish-shaped chamber base 21 whose upper surface is open, and a chamber cover 22 which is made of a pressure-resistant acrylic plate which closes the upper surface opening of the chamber base 21 openably and closably. A rear end portion of the chamber cover 22 is supported by a rear end portion of the casing 11 so as to be rotatable about a horizontal axis so that the front side can move up and down. A packing 23 made of rubber is provided as a sealing member around the lower surface of the chamber cover 22, and the packing 23 seals the chamber cover 22 airtightly to the chamber base 21.

  As shown in FIGS. 1 to 3, the heat sealing device 30 is provided at the front of the chamber 20. The heat sealing device 30 seals the periphery of the opening of the heat sealable packaging bag housed in the chamber 20. 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. The heat sealing device 30 includes lower and upper blocks 31 and 32 for narrowing and holding the periphery of the tip opening of the packaging bag. The lower block 31 is made of a square pipe member made of aluminum, and is provided on the front of the chamber base 21 so as to be removable and vertically movable. A band plate heater 33 made of nichrome material is provided on the upper surface of the lower block 31. The upper block 32 is a block made of elastically deformable silicon, and is provided at the front of the lower surface of the chamber cover 22 at a position facing the upper side of the lower block 31.

  As shown in FIGS. 2 and 3, a pair of left and right lifting mechanisms 34 for raising and lowering the lower block 31 up and down is provided at the front of the chamber base 21. The lifting mechanism 34 includes a pair of left and right support shafts 34a penetrating the bottom wall of the front of the chamber base 21 and a lifting cylinder 34b for moving the support shafts 34a up and down. The lifting cylinders 34b vertically move the pair of left and right support shafts 34a. The lower block 31 is moved up and down in the chamber 20 by moving it.

  As shown in FIG. 2 and FIG. 3, an oil circulation type oil rotary vacuum pump 40 is provided at the lower part in the casing 11, and the oil rotary vacuum pump 40 is a component such as a rotor, stator and vanes by oil. Phase-phase vacuum pump aiming to reduce air tightness and void space between Specifically, a rotor that is rotated by an electric motor in a cylindrical stator filled with oil, and an inner peripheral surface of the stator that is radially movably incorporated in each rotor groove provided radially to the rotor The rotor is rotated to change its volume, with air being sealed in a state where the spaces formed by the rotor and the vanes in the cylindrical stator are made air-tight by having a plurality of vanes in contact with the It suck | inhales from a suction port and discharges | emits from the exhaust port 40a. The exhaust port 40a is formed in the upper portion of the rear wall of the oil rotary vacuum pump 40, and the exhaust gas discharged from the exhaust port 40a contains oil in the form of mist.

  Further, as shown in FIG. 3, the oil rotary vacuum pump 40 is connected to the chamber 20 by the suction pipe assembly 50, and the suction pipe assembly 50 comprises a suction pipe 51 made of a pressure resistant pipe member and a suction pipe 51. A pressure-resistant suction hose (not shown) connected to the chamber is provided. The suction pipe 51 is provided with a vacuum valve 52, and air in the chamber 20 can be sucked by the oil rotary vacuum pump 40 by opening the vacuum valve 52. An outside air introducing pipe 51a for introducing the outside air into the chamber 20 is branched to the suction pipe 51, and the outside air introducing pipe 51a is further branched from a first pipe 51a1 and a second pipe 51a2. The first and second pipe portions 51a1 and 51a2 are provided with first and second outside air introduction valves 53 and 54 for opening and closing them. The first and second outside air introduction valves 53 and 54 are for introducing outside air into the chamber 20, and the first outside air introduction valve 53 is formed to have a larger diameter than the second outside air introduction valve 54. When the introduction valve 53 is opened, the outside air is rapidly introduced into the chamber 20, and when the second outside air introduction valve 54 is opened, the outside air is slowly introduced into the chamber 20.

  In the suction pipe 51, a warming-up pipe 51b branched from between the oil rotary vacuum pump 40 and the vacuum valve 52 is branched, and a warming-up valve 55 is provided in the warming-up pipe 51b. . When the oil rotary vacuum pump 40 is warmed up, open air is introduced to the oil rotary vacuum pump 40 by opening the warm-up valve 55. In the suction pipe 51, a pressure detection pipe 51c is branched via the outside air introduction pipe 51a, and a vacuum gauge 56 for detecting the pressure of the chamber 20 is provided in the pressure detection pipe 51c. When the inside of the chamber 20 is not degassed by the oil rotary vacuum pump 40, the pressure in the chamber 20 detected by the vacuum gauge 56 is 101 kPa (abs) which is the same as the atmospheric pressure, and the degree of vacuum at this time is 0%. is there. The inside of the chamber 20 is deaerated by an oil rotary vacuum pump 40 to make it underpressure, and when the pressure in the chamber detected by the vacuum gauge 56 reaches 0 kPa (abs), the degree of vacuum is 100%.

  An oil catch duct 60 for recovering oil contained in the exhaust discharged from the exhaust port 40 a of the oil rotary vacuum pump 40 is detachably mounted on the base plate 12 of the casing 11 in the machine room 14 at the lower part of the casing 11. The oil catch duct 60 is a box having a substantially rectangular parallelepiped shape and is disposed on the rear side of the exhaust port 40a. The inside of the oil catch duct 60 has an exhaust passage 60a for passing the exhaust gas discharged from the exhaust port 40a of the oil rotary vacuum pump 40, and the oil catch duct 60 contains oil contained in the exhaust gas passing through the exhaust passage 60a. The oil is collected by being attached to the inner wall surface of the oil catch duct 60. Further, an air discharge port 60b is formed at the middle portion in the vertical direction of the rear wall of the oil catch duct 60, and the exhaust gas discharged from the exhaust port 40a of the oil rotary vacuum pump 40 passes through the internal exhaust passage 60a. It is discharged from the discharge port 60 b into the machine room 14 at the lower part of the casing 11.

  In the vacuum packaging machine 10 configured as described above, the periphery of the opening of the packaging bag is placed on the upper side of the lower block 31 in the chamber 20, and the oil rotary vacuum pump 40 has a predetermined degree of vacuum in the chamber 20 After the pressure is reduced until the vacuum valve 52 is closed and the support shaft 34a is raised by the lift cylinder 34b, the lower block 31 is raised to a position where it is pressed against the upper block 32 by the support shaft 34a. At this time, the periphery of the opening of the packaging bag placed on the upper side of the lower block 31 is held in a closed state by being compressed by the lower and upper blocks 31 and 32, and the periphery of the opening of the packaging bag is the heater 33 It is heat-welded, sealed, and sealed by heating by means of After the packaging bag is sealed, by opening the first outside air introduction valve 53 and / or the second outside air introduction valve 54, the inside of the chamber 20 is returned to atmospheric pressure by the outside air introduced from the suction pipe 51, and the chamber The cover 22 opens the chamber base 21 from the closed state. In the vacuum packaging machine 10, not only a so-called hot-pack vacuum packaging program for vacuum-packaging a packaging bag containing a package having a temperature higher than normal temperature like soup but also from a dried package or normal temperature Even after executing a normal vacuum packaging program for vacuum packaging a packaging bag containing a low temperature package, the oil rotary vacuum pump 40 is closed with the vacuum valve 52 closed and the warm-up valve 55 opened. It is controlled to warm up.

  In the vacuum packaging machine 10 configured as described above, the machine chamber 14 at the lower part of the casing 11 has the exhaust passage 60a for passing the exhaust gas discharged from the exhaust port 40a of the oil rotary vacuum pump 40, and the exhaust passage 60a An oil catch duct 60 is provided for collecting the oil by adhering the oil contained in the exhaust passing through to the inner wall surface. When the vacuum packaging program packaging bag of the vacuum packaging machine 10 is executed, the air in the chamber 20 is sucked into the oil rotary vacuum pump 40 through the suction pipe 51, and the sucked air is discharged from the exhaust port 40a. Released to the outside of 40. Although oil is contained in the form of mist in the exhaust gas to be discharged, the oil contained in the exhaust gas to be discharged adheres to the inner wall surface of the oil catch duct 60 so that the machine chamber 14 in the casing 11 and It did not discharge | release to the kitchen etc. which installed the vacuum packaging machine 10 in the outer side of the casing 11. FIG. Although the oil catch duct 60 of the first embodiment is detachably attached to the bottom of the casing 11, the oil catch duct 60 is attached to the rear surface of the oil rotary vacuum pump 40 as shown in FIG. It may be attached as possible.

  Another embodiment of the oil catch duct 60 of the vacuum packaging machine 10 configured as described above will be described. The oil catch duct 60 of the first embodiment shown in FIG. 2 has a box shape having a substantially rectangular parallelepiped shape, but in the vacuum packaging machine 10 of the second embodiment shown in FIG. A shallow box-shaped oil reservoir 61 having a front wall 61a extending along the rear wall of the oil rotary vacuum pump 40 and having an open upper surface for storing oil at the bottom of the front wall 61a; A duct cover 62 is provided to cover the upper side and form an exhaust passage 60a inside. The front cover and the lower surface of the duct cover 62 are opened to cover the side surface and the upper surface of the oil reservoir 61, and the duct cover 62 is detachably attached to the base plate 13 of the casing 11. The above-described air discharge port 60b is formed at the middle portion in the vertical direction of the rear wall of the duct cover 62, and the exhaust gas discharged from the exhaust port 40a of the oil rotary vacuum pump 40 passes through the internal exhaust passage 60a. It is discharged from the discharge port 60 b into the machine room 14 at the lower part of the casing 11.

  In the vacuum packaging machine 10 according to the second embodiment, the oil collected in the oil catch duct 60 is accumulated in the oil reservoir 61, and the oil collected from the oil catch duct 60 is less likely to leak. Furthermore, in the case where the oil storage portion 61 is provided in the oil catch duct 60 as in the second embodiment, as shown in FIG. 6, the oil outlet 61 b is provided in the lower portion of the oil storage portion 61 The oil plug 63 may be detachably attached to the port 61b. In this case, the oil can be discharged from the oil outlet 61b by removing the oil plug 63, and the maintenance workability can be enhanced.

  In the vacuum packaging machine 10 according to the second embodiment, as shown in FIG. 7, the left and right side walls of the duct cover 62 are arranged to extend vertically above the oil reservoir 61, and the lower end portions of both side walls The oil can be made easy to drip oil falling on each side wall of the duct cover 62 to the oil storage portion 61 when the inclined portion 62a is provided to incline obliquely upward to the outside. The collected oil can be easily collected by the oil reservoir 61.

  In the vacuum packaging machine 10 according to the third embodiment shown in FIGS. 8 and 9, the oil catch duct 60 is provided with a partition plate 64 which extends the exhaust passage 60a by partitioning the internal space. The partition plate 64 divides the internal space of the oil catch duct 60 back and forth in a state where the lower part of the oil catch duct 60 communicates back and forth, and the length of the exhaust passage 60a is the oil catch duct according to the first and second embodiments. It is approximately double of 60. Thus, by providing the partition plate 64 for lengthening the exhaust passage 60a in the oil catch duct 60, the exhaust passage 60a can be lengthened, and the oil catch duct 60 is oil contained in the exhaust passing through the exhaust passage 60a. Could increase the collection efficiency of

  Further, since the partition plate 64 is arranged to extend vertically above the oil storage portion 61, the oil attached to the partition plate 64 easily flows down to the oil storage portion 61, and oil leaks from the oil catch duct 60. It is difficult. In the case where the oil catch duct 60 is provided with the partition plate 64 as in the third embodiment, as shown in FIG. 10, the central portion 64 a is obtained by notching the both sides in the width direction of the partition plate 64 diagonally. When the oil is made to project downward, the oil flowing down from the partition plate 64 gathers at the central portion in the width direction and drops onto the oil storage portion 61, so the oil flowing down from the partition plate 64 can be easily recovered by the oil storage portion 61 . In the third embodiment, the exhaust passage 60a is elongated by dividing the oil catch duct 60 into two by the partition plate 64, but the present invention is not limited to this, and the partition plate 64 is not limited thereto. The exhaust passage 60a may be elongated by dividing the left and right of the oil catch duct 60 into two. In addition, by using the plurality of partition plates 64, the oil catch duct 60 may be divided into two or more in the front and rear and / or the left and right to make the exhaust passage 60a longer.

  In the vacuum packaging machine 10 of the fourth embodiment shown in FIG. 11, the bottom wall of the oil catch duct 60 is inclined obliquely upward from the position where the exhaust port 40a of the oil rotary vacuum pump 40 is formed. Specifically, the oil catch duct 60 has a cylindrical shape inclining obliquely upward from the exhaust port 40a60 of the oil rotary vacuum pump 40 and bent so that the air discharge port 60b at the tip end opens upward. The internal space of the cylindrical oil catch duct 60 is an exhaust passage 60a. In the vacuum packaging machine 10 of the fourth embodiment, the oil collected in the oil catch duct 60 flows through the bottom wall and returns from the exhaust port 40 a to the oil rotary vacuum pump 40, and the oil catch duct 60 There is no need to collect it.

  In the vacuum packaging machine 10 of the first to fourth embodiments, the exhaust port 40a of the oil rotary vacuum pump 40 is disposed on the rear side surface (one side surface) of the oil rotary vacuum pump, but it is shown in FIG. In the vacuum packaging machine 10 of the fifth embodiment, the oil catch duct 60 is applied to one in which the exhaust port 40a of the oil rotary vacuum pump 40 is disposed to open upward at the upper surface. In the vacuum packaging machine 10 of the fifth embodiment, a box-shaped oil catch duct 60 having a connection port 60c on the bottom wall is connected to the exhaust port 40a opened upward, and the side wall of the box-shaped oil catch duct 60 And the air outlet 60b. Further, a partition 60d is provided in the box-shaped oil catch duct 60 so that the air flowing in from the connection port 60c passes through the whole of the oil catch duct 60 as much as possible. 60a has become longer. Further, the bottom wall of the box-shaped oil catch duct 60 is inclined so that the position where the connection port 60c is formed is low, and the connection port is formed with oil accumulated on the bottom wall in the box-shaped oil catch duct 60. From 60c, it will flow in and return to the exhaust port 40a of the oil rotary vacuum pump 40.

  It is preferable that the oil catch duct 60 of each of the above-described embodiments be detachably attached to the casing 11 or the oil rotary vacuum pump 40. In this case, the oil catch duct 60 can be removed to recover the oil collected inside, and the inside of the oil catch duct 60 can be easily cleaned.

  Moreover, it is preferable to arrange the filter which collects oil inside the oil catch duct 60 of said each embodiment. In this case, the oil collection efficiency in the oil catch duct 60 can be further enhanced.

 DESCRIPTION OF SYMBOLS 10 ... Vacuum packaging machine, 11 ... Casing, 20 ... Chamber, 30 ... Sealing apparatus (heat sealing apparatus), 40 ... Oil rotary vacuum pump, 40a ... Exhaust port, 60 ... Oil catch duct, 60a ... Exhaust passage, 60b ... discharge port, 61 ... oil reservoir portion, 61b ... oil drain port, 63 ... oil drain plug, 64 ... partition plate, 64a ... central portion.

Claims (12)

A chamber provided at an upper portion of the casing for containing a packaging bag containing the objects to be packaged;
A sealing device provided in the chamber for sealing the periphery of the opening of the packaging bag and sealing the packaging bag;
An oil circulating type oil rotary vacuum pump provided at a lower portion of the casing and degassing the chamber to make it under negative pressure;
The inside of the packaging bag is removed by degassing the inside of the chamber with the oil rotary vacuum pump to make it under negative pressure, and sealing the periphery of the opening of the packaging bag housed in the chamber by the sealing device. It is a vacuum packaging machine that seals in a disturbed state,
The lower part of the casing has an exhaust passage for passing the exhaust released from the exhaust port of the oil rotary vacuum pump, and oil contained in the exhaust passing through the exhaust passage is adhered to the inner wall surface. A vacuum packaging machine characterized in that an oil catch duct is provided. In the vacuum packaging machine according to claim 1,
An oil storage portion for storing collected oil is provided at the bottom of the oil catch duct. In the vacuum packaging machine according to claim 2,
An oil drain port is provided at a lower portion of the oil storage portion, and an oil drain plug is detachably attached to the oil drain port. In the vacuum packaging machine according to any one of claims 1 to 3,
A vacuum packaging machine characterized in that a partition plate is provided in the oil catch duct to lengthen the exhaust passage by partitioning an internal space. In the vacuum packaging machine according to claim 4,
The vacuum packing machine characterized in that the partition plate is arranged to extend vertically above the oil reservoir. In the vacuum packaging machine according to claim 5,
The vacuum packing machine characterized in that the central part in the width direction of the partition plate is protruded downward. In the vacuum packaging machine according to claim 2 or 3,
At least one side wall of the oil catch duct is disposed to extend vertically above the oil storage portion, and a lower end portion of the at least one side wall is provided with an inclined portion inclined obliquely upward toward the outside. Vacuum packing machine characterized by In the vacuum packaging machine according to claim 1,
A vacuum packaging machine characterized in that a bottom wall of the oil catch duct is inclined obliquely upward from a position where the exhaust port is formed. In the vacuum packaging machine according to claim 1,
The exhaust port of the oil rotary vacuum pump is disposed to open upward,
A box-shaped oil catch duct having a connection port on the bottom wall is connected to the exhaust port;
A vacuum packing machine characterized in that an air outlet is formed on a side wall of the box-shaped oil catch duct. In the vacuum packaging machine according to claim 9,
A vacuum packing machine characterized in that a bottom wall of the box-shaped oil catch duct is inclined so as to lower the connection port. The vacuum packaging machine according to any one of claims 1 to 10.
A vacuum packing machine characterized in that the oil catch duct is removably attached to the casing or the oil rotary vacuum pump. The vacuum packaging machine according to any one of claims 1 to 11.
A filter for collecting oil is disposed inside the oil catch duct.

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