JP2015229518A - Packing machine, gas supply device and packing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide packing machine, a gas supply device and a packing method capable of preventing reduction in quantity of the content of a bag or the occurrence of seal failure in a bag mouth of the bag, by restraining a filling material such as powder filled inside the bag from flying up, when substituting gas in the bag by supplying the gas to the inside of the bag filled with the filling material such as the powder.SOLUTION: A gas supply device 11 comprises a head 16 provided with a plurality of micro-pores and a gas supply part for supplying gas to the head 16. The gas supply device 11 also comprises a head support part for movably supporting the head 16 between an advance position being a position advanced to the inside of the bag and a retreat position being a position retreated from the inside of the bag, and when supplying the gas to the inside of the bag by the gas supply device 11, the head 16 moves to the advance position.

Description

  The present invention replaces the gas in the bag by supplying a gas made of an inert gas such as carbon dioxide or nitrogen into the bag filled with an object to be filled such as powder, and then the bag bag. The present invention relates to a packaging machine that seals a mouth, a gas supply device provided in such a packaging machine, and a packaging method using such a packaging machine.

  In a packaging machine used in the field of film packaging, the bag is filled with powder (for example, green tea, flour, fried powder, etc.), and then the bag is made of an inert gas such as carbon dioxide or nitrogen. It is known to replace the gas in the bag by supplying gas and then seal the bag mouth of the bag. Specifically, a plurality of holding parts for holding the bag in the packaging machine are provided at equal intervals along the circumferential direction on the outer peripheral edge of the rotary table, and the rotary table is held in a state where the bag is held by the holding part. By intermittently rotating the bag, the opening of the bag held by the holding unit, the operation of supplying the filling material into the bag held by the holding unit, and the dioxide inside the bag held by the holding unit. An operation of supplying a gas composed of an inert gas such as carbon or nitrogen and an operation of sealing the bag mouth of the bag held by the holding unit are sequentially performed. In a packaging machine in which a plurality of holding units are provided on such a rotary table, one of the two packaging methods as described below is mainly used.

  As a first packaging method, a gas blowing nozzle is disposed above the position of the bag held by the holding portion when the rotary table is stopped, and when the bag is positioned directly below the nozzle, the nozzle There is a method of supplying gas into the bag by blowing out a gas composed of an inert gas such as carbon dioxide or nitrogen downward. Such a gas supply method is disclosed in Patent Document 1, for example.

  Further, as a second packaging method, a nozzle for blowing gas is arranged in a holding part provided on the outer peripheral edge of the rotary table, and when the holding part is moved by the rotating operation of the rotary table, There is a method of supplying a gas made of an inert gas such as carbon dioxide or nitrogen to the inside of the held bag by the nozzle. That is, in this method, the gas blowing nozzle moves integrally with the holding portion. Such gas supply methods are disclosed in Patent Documents 2 to 4, for example.

Japanese Patent Laid-Open No. 2005-1765 JP 2007-126208 A JP 2004-67224 A JP 2005-35610 A

  In a conventional packaging machine, when replacing the gas in the bag by supplying a gas composed of an inert gas such as carbon dioxide or nitrogen into the bag filled with an object to be filled such as powder, If the flow rate of the gas blown from the nozzle is increased in order to improve the gas substitution rate, the filling material such as powder filled in the bag will rise, and the amount of the bag contents There has been a problem that when the bag mouth of the bag is reduced or a powder is caught in the seal portion of the bag mouth, sealing failure may occur.

  The present invention has been made in consideration of such points, and when replacing the gas in the bag by supplying gas into the bag filled with an object to be filled such as powder, Suppresses the rising of the filling material such as powder filled inside the bag, which reduces the amount of bag contents and causes a sealing failure at the bag mouth of the bag. It is an object to provide a packaging machine, a gas supply device, and a packaging method that can be prevented.

  The packaging machine of the present invention includes a holding unit that holds a bag, a filling material supply unit that fills a filling material inside the bag held by the holding unit, and a filling material that is filled by the filling material supply unit. A gas supply device that replaces the gas in the bag by supplying gas to the inside of the supplied bag, the gas supply device including a head provided with a plurality of fine holes, and a gas in the head And a gas supply unit for supplying the gas.

  According to such a packaging machine, since the gas supplied from the gas supply unit to the head is dispersed and blown out from the head, the gas is supplied to the inside of the bag filled with the filling material such as powder. When the gas in the bag is replaced by this, it is possible to prevent the filling material such as the powder filled in the bag from rising, thereby reducing the amount of the contents of the bag. Further, it is possible to prevent a sealing failure from occurring at the bag mouth of the bag.

  In the packaging machine of the present invention, the holding unit is moved along an annular path, and the gas supply device is configured to move the bag held by the holding unit moving along the path. Gas may be supplied to the inside.

  In this case, the gas supply device may be attached to the holding unit.

  In the packaging machine of this invention, the said gas supply apparatus supports the said head movably between the advance position which is the position which advanced the inside of a bag, and the retracted position which is the position retracted from the inside of a bag It has a support part, and when the gas is supplied to the inside of the bag by the gas supply device, the head may move to the advance position.

  In this case, when the head moves to the advanced position, the head may be positioned below a predetermined position in the bag height direction.

  The head support part may include a cylinder for moving the head forward and backward, and the cylinder may move the head downward from a predetermined position in the bag height direction.

  The packaging machine of the present invention includes a holding unit that holds a bag, a filling material supply unit that fills a filling material inside the bag held by the holding unit, and a filling material that is filled by the filling material supply unit. A gas supply device that has a head for supplying gas to the inside of the supplied bag, and replaces the gas in the bag by supplying gas to the inside of the bag by the head. The apparatus includes a head support portion that supports the head movably between an advanced position where the head is advanced into the bag and a retracted position where the head is retracted from the bag. When the gas is supplied into the bag by the apparatus, the head moves to the advanced position.

  According to such a packaging machine, by moving the head to the advanced position, which is the position advanced into the bag, the gas is supplied to the inside of the bag filled with an object to be filled such as powder. When replacing the gas in the bag, the filling material such as powder filled in the bag is prevented from rising, which reduces the amount of the bag contents, It is possible to prevent a sealing failure from occurring at the mouth.

  In the packaging machine of this invention, when the said head moves to the said advance position, the said head may be located below rather than the predetermined position in the height direction of a bag.

  In this case, the head support part may include a cylinder for moving the head forward and backward, and the cylinder may be moved below a predetermined position in the height direction of the bag by the cylinder.

  In the packaging machine of the present invention, the holding unit is moved along an annular path, and the gas supply device is configured to move the bag held by the holding unit moving along the path. Gas may be supplied to the inside.

  In this case, the gas supply device may be attached to the holding unit.

  A gas supply device according to the present invention is a gas supply device for supplying gas into a bag, and includes a head provided with a plurality of fine holes, and a gas supply unit for supplying gas to the head. The gas is supplied from the gas supply unit to the head, so that the gas is blown out from the fine hole of the head.

  According to such a gas supply device, since the gas supplied from the gas supply unit to the head is dispersed and blown out from the head, the gas is supplied into the bag filled with the filling material such as powder. When replacing the gas in the bag by supplying, it suppresses that the filling material such as the powder filled in the bag soars, and this reduces the amount of the contents of the bag. It is possible to prevent a sealing failure from occurring at the bag mouth of the bag.

  The gas supply device of the present invention is a gas supply device for supplying gas to the inside of a bag, a head for supplying gas to the inside of the bag, a gas supply unit for supplying gas to the head, and the head A head support portion that supports the movable portion between an advanced position that is a position advanced into the inside of the bag and a retracted position that is a position retracted from the inside of the bag, and is provided inside the bag by the gas supply device. When the gas is supplied, the head moves to the advanced position.

  According to such a gas supply device, by moving the head to the advanced position which is the position advanced into the bag, gas is supplied into the bag filled with the filling material such as powder. When substituting the gas in the bag, it suppresses that the filling material such as the powder filled in the bag soars, thereby reducing the amount of the bag contents, It is possible to prevent a sealing failure from occurring at the bag mouth.

  The packaging method of the present invention includes a step of holding a bag by a holding unit, a step of filling the bag into the bag held by the holding unit, and a head provided with a plurality of fine holes. And a step of replacing the gas in the bag by supplying the gas to the inside of the bag.

  According to such a packaging method, since the gas is dispersed and blown out from the head, the gas in the bag is replaced by supplying the gas into the bag filled with the filling material such as powder. In doing so, it suppresses the filling material such as the powder filled in the bag from rising, which reduces the amount of the bag contents and causes a sealing failure at the bag mouth of the bag. Can be prevented.

  The packaging method of the present invention includes a step of holding a bag by a holding unit, a step of filling an object to be filled in the bag held by the holding unit, and a head for supplying gas into the bag. And a step of replacing the gas in the bag by supplying gas to the inside of the bag to which the filling material is supplied by the head moved to the advanced position. And.

  According to such a packaging method, by moving the head to the advanced position, which is the position advanced into the bag, the gas is supplied to the inside of the bag filled with an object to be filled such as powder. When replacing the gas in the bag, the filling material such as powder filled in the bag is prevented from rising, which reduces the amount of the bag contents, It is possible to prevent a sealing failure from occurring at the mouth.

  According to the packaging machine, the gas supply device, and the packaging method of the present invention, when replacing the gas in the bag by supplying the gas into the bag filled with the filling material such as powder, Suppresses the rising of the filling material such as the powder filled inside, thereby preventing the amount of the bag contents from decreasing or causing a sealing failure at the bag mouth of the bag. be able to.

It is a perspective view which shows typically the whole structure of the packaging machine by embodiment of this invention. It is a side view which shows the structure of the gas supply apparatus provided in the packaging machine shown in FIG. 1, Comprising: It is a figure which shows a state when a head exists in the evacuation position which is a position evacuated from the inside of a bag. It is a side view which shows the structure of the gas supply apparatus provided in the packaging machine shown in FIG. 1, Comprising: It is a figure which shows the state in the middle of moving the head from the retracted position to the inside of a bag. It is a side view which shows the structure of the gas supply apparatus provided in the packaging machine shown in FIG. 1, Comprising: It is a figure which shows a state when a head exists in the advance position which is the position which advanced to the inside of a bag. It is a perspective view which shows typically the whole structure of the packaging machine which concerns on a modification.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are diagrams showing a packaging machine according to the present embodiment and a gas supply device provided in the packaging machine. Among these, FIG. 1 is a perspective view schematically showing the overall configuration of the packaging machine according to the present embodiment, and FIGS. 2 to 4 show the configuration of the gas supply device provided in the packaging machine shown in FIG. FIG.

  The packaging machine 10 according to the present embodiment fills the inside of a bag (indicated by reference symbol W in FIGS. 1 to 4) with powders (indicated by reference symbol S in FIG. 1) such as green tea, flour, and deep-fried flour. Then, by supplying a gas made of an inert gas such as carbon dioxide or nitrogen to the inside of the bag, the gas in the bag is replaced, and then the bag mouth of the bag is sealed. As shown in FIG. 1, the packaging machine 10 of the present embodiment includes a rotary table 20 provided with a plurality of holding units 12 for holding a bag, and the bag is held by the holding unit 12. By rotating the rotary table 20 intermittently, the operation of opening the bag held by the holding unit 12, the operation of supplying an object to be filled into the bag held by the holding unit 12, and the holding unit 12 hold the bag. The operation of supplying gas to the inside of the bag and the operation of sealing the bag mouth of the bag held by the holding unit 12 are sequentially performed.

  Details of each component of the packaging machine 10 will be described below.

  As shown in FIG. 1, a plurality of holding portions 12 are provided at equal intervals along the circumferential direction of the turntable 20 on the outer peripheral edge of the turntable 20. Each holding portion 12 has a pair of holding members 12a for holding the side edge portions of the bag, and the pair of holding members 12a holds a portion near the bag mouth at the side edge portion of the bag. Thus, the bag is held by the holding portion 12.

  In the vicinity of the packaging machine 10, a conveyor-type bag supply device 40 for supplying empty bags to the packaging machine 10 is provided. It is designed to be supplied one by one. More specifically, the empty bag supplied to the packaging machine 10 by the bag feeder 40 is held by the holding unit 12 of the packaging machine 10 at the position A in FIG. The bag held by the holding unit 12 is moved to each process position from position B to position I in FIG. 1 by rotating the rotary table 20 intermittently counterclockwise in FIG. Each position will temporarily stop.

  A printing device 22 for printing on the bag surface of the bag held by the holding unit 12 is provided at a location corresponding to the bag position B in FIG. Further, an opening device 24 for opening a bag mouth of the bag held by the holding unit 12 is provided at a location corresponding to the position C of the bag in FIG. The opening device 24 has a pair of suction cups, and the bag mouth of the bag is opened by suctioning both side surfaces of the bag by these suction cups. In addition, at a portion corresponding to the position D of the bag in FIG. 1, a filling material supply device 26 for filling the filling material such as powder into the bag held by the holding unit 12 is provided. . The filling material supply device 26 is composed of, for example, a hopper, and the filling material (indicated by reference numeral S in FIG. 1) charged into the upper opening of the hopper is supplied into the bag at the position D by the hopper. become.

  1 is provided with a tapping device 28 for tapping the bottom of the bag held by the holding unit 12 at locations corresponding to the positions E to G of the bag. 1 is provided with a pair of heat plates 30 for heat-sealing the bag mouth of the bag held by the holding portion 12, and corresponding to the position H of the bag in FIG. When the bag mouth of the bag is sandwiched between the plates 30, the bag mouth is heated and sealed. 1 is provided with a pair of cooling plates 32 for cooling the bag mouths of the bags heated by the pair of hot plates 30. 1 is provided with a discharge chute 50 for discharging the bag whose bag mouth has been cooled by the pair of cooling plates 32. When the bag filled with is released from the holding unit 12, the bag is discharged from the packaging machine 10 by the discharge chute 50. The bag discharged by the discharge chute 50 is indicated by reference symbol W ′ in FIG.

  Moreover, in this Embodiment, as shown in FIG. 2 thru | or FIG. 4, by supplying the gas which consists of inert gas, such as a carbon dioxide and nitrogen, into the inside of the bag with which the to-be-filled material was filled, A gas supply device 11 for replacing gas is attached to the holding member 12 a of each holding unit 12. Here, when the bag is moving between position E to position G in FIG. 1, gas is supplied into the bag by the gas supply device 11 as shown in FIGS. 2 to 4. Yes. In FIG. 1, the illustration of the head 16 and the air cylinder 14 of the gas supply device 11 attached to the holding member 12a of each holding unit 12 is omitted to make the overall configuration of the packaging machine 10 easier to see.

  As shown in FIGS. 2 to 4, the gas supply device 11 of the present embodiment includes a columnar head 16 provided with a plurality of fine holes, a rod-like member 15 having the head 16 attached to the tip thereof, It has an air cylinder 14 for moving the rod-shaped member 15 forward and backward, and an L-shaped support arm 13 for supporting the air cylinder 14, and the base end portion of the support arm 13 has a shaft member 13a with respect to the holding member 12a. It is attached so that it can rotate as a center. The gas supply device 11 according to the present embodiment is provided with a drive motor 18 for rotating the support arm 13 around the shaft member 13a. Here, in this embodiment, when the air cylinder 14 moves the rod-shaped member 15 forward and backward, or the drive motor 18 rotates the support arm 13, the head 16 is a position where the head 16 has advanced into the bag. And a retracted position that is a position retracted from the inside of the bag. Here, FIG. 2 is a diagram showing a state when the head 16 is in the retracted position, which is a position retracted from the inside of the bag, and FIG. 3 shows the head 16 moving from the retracted position to the inside of the bag. FIG. 4 is a diagram showing a state in the middle, and FIG. 4 is a diagram showing a state when the head 16 is in the advanced position, which is the position advanced into the bag.

  As described above, the head 16 is formed of a cylindrical shape provided with a plurality of fine holes. Specifically, the head 16 is made of, for example, a resin sintered body or a metal sintered body, and many fine holes are randomly provided in the resin sintered body or the metal sintered body. Further, a supply pipe (not shown) for supplying gas to the head 16 is provided inside the rod-shaped member 15, and a gas supply pipe 66 described later is passed through a supply pipe inside the rod-shaped member 15. When gas is supplied to the head 16, the gas is blown out from the fine holes of the head 16. Thus, since the head 16 is formed of a cylindrical shape provided with a plurality of fine holes, gas is dispersed and blown out from the head 16, and the bag is filled with an object to be filled such as powder. Even in this case, when a gas is supplied to the inside of the bag by the head 16, it is possible to suppress the filling material such as powder from rising from the bag.

  The air cylinder 14 moves the rod-like member 15 with the head 16 attached to the tip between a position as shown in FIG. 3 and a position as shown in FIG. The air cylinder 14 is supported by an L-shaped support arm 13, and a base end portion of the support arm 13 is attached to the holding member 12a so as to be rotatable about the shaft member 13a. Then, when the drive motor 18 rotates the support arm 13, the air cylinder 14 is retracted from above the bag opening as shown in FIG. 2, and above the bag opening as shown in FIG. To move between. Here, when the air cylinder 14 is positioned above the bag mouth as shown in FIG. 3, the air cylinder 14 extends the rod-shaped member 15 downward, so that the head attached to the tip of the rod-shaped member 15. 16 also moves downward in the bag, and the head 16 is positioned below the predetermined position in the height direction of the bag (specifically, the center position in the height direction of the bag) inside the bag. Become.

  In the present embodiment, the support arm 13, the drive motor 18, the air cylinder 14, the rod-like member 15 and the like retract the head 16 from the advance position (see FIG. 4), which is the position where the head 16 has advanced into the bag. The head support portion is configured to be movably supported with respect to the retracted position (see FIG. 2), and when the gas is supplied into the bag by the gas supply device 11, the head 16 is shown in FIG. It moves to the advance position as shown. More specifically, the head 16 moves to the advanced position as shown in FIG. 4 until the bag moves from the position E to the position G in FIG. 1, and gas is supplied into the bag by the head 16. It is like that.

  As shown in FIG. 1, a rotary member 64 to which a gas supply pipe 66 for supplying gas to the head 16 of each gas supply device 11 is attached is provided at the center position of the turntable 20 of the packaging machine 10. In synchronization with the rotation of the turntable 20, the rotating member 64 is also rotated in the counterclockwise direction in FIG. The rotating member 64 is provided with a gas supply pipe 62 that communicates with each gas supply pipe 66, and a gas supply source 60 is provided at the base end of the gas supply pipe 62. Then, gas is sent from the gas supply source 60 to each gas supply pipe 66 through the gas supply pipe 62 so that the gas is supplied from these gas supply pipes 66 to the head 16 of each gas supply device 11. Become. In the present embodiment, the gas supply source 60, the gas supply pipe 62, the gas supply pipe 66, etc. constitute a gas supply unit for supplying gas to the head 16.

  Next, operation | movement of the packaging machine 10 which consists of such a structure is demonstrated.

  First, empty bags are supplied one by one to the packaging machine 10 by the conveyor-type bag supply device 40, and the empty bags are held by the holding unit 12 of the packaging machine 10 at position A in FIG. The bag held by the holding unit 12 is moved to each process position from position B to position I in FIG. 1 by rotating the rotary table 20 intermittently counterclockwise in FIG. Stop temporarily at each position.

  The bag stopped at the position B in FIG. 1 is printed on the bag surface by the printing device 22. When the bag stops at the position C in FIG. 1, the bag mouth of the bag is opened by the opening device 24 including a pair of suction cups. When the bag stops at a position D in FIG. 1, the filling material supply device 26 including a hopper fills the bag with a filling material such as powder. In addition, while the bag moves at the positions A to D, the head 16 of the gas supply device 11 is maintained at the retracted position retracted from the inside of the bag as shown in FIG.

  Then, when the bag moves to position E in FIG. 1, the head 16 of the gas supply device 11 advances from the retracted position as shown in FIG. 2 into the bag as shown in FIG. Move to. Specifically, first, the drive motor 18 rotates the support arm 13 around the shaft member 13a, so that the head 16 enters the upper position inside the bag as shown in FIG. The air cylinder 14 extends the rod-like member 15 downward to move the head 16 downward. The head 16 moves inside the bag at a predetermined position in the height direction of the bag (specifically, the height of the bag). (The center position in the direction). Then, gas is supplied from the gas supply pipe 66 to the gas supply pipe 66 through the gas supply pipe 62 until the bag moves from position E to position G in FIG. Gas is supplied to the head 16 of the apparatus 11, and gas is blown out from the head 16 inside the bag, so that the gas inside the bag is replaced. When the bag moves to the position G in FIG. 1, the head 16 of the gas supply device 11 moves from the advanced position where the gas supply device 11 has advanced into the bag as shown in FIG. 4 to the retreat position where it has been retracted from the inside of the bag as shown in FIG. As a result, the upper space of the bag mouth is opened.

  In addition, the tapping device 28 performs tapping on the bottom of the bag until the bag moves from position E to position G. When the bag stops at the position H in FIG. 1, the bag mouth of the bag is heated and sealed by the pair of hot plates 30. Thereafter, when the bag stops at the position I in FIG. 1, the bag mouth of the bag heated by the pair of hot plates 30 is cooled by the pair of cooling plates 32. The bag whose mouth is cooled by the pair of cooling plates 32 is discharged from the packaging machine 10 through the discharge chute 50 by being released from the holding unit 12. In this way, a bag filled with an object to be filled such as powder is shipped as a final product.

  According to the packaging machine 10 of the present embodiment configured as described above and the gas supply device 11 provided in such a packaging machine 10, the head 16 provided with a plurality of fine holes is attached to the gas supply device 11. As a result, the gas supplied to the head 16 from the gas supply unit including the gas supply source 60 and the gas supply pipe 66 is dispersed and blown out from the head 16, and the bag is filled with powder or the like. Even when an object is filled, when a gas is supplied to the inside of the bag by the head 16, the object to be filled such as powder is prevented from rising from the bag.

  Moreover, in the packaging machine 10 of this Embodiment, the holding | maintenance part 12 comes to move along a cyclic | annular path | route (specifically outer periphery of the turntable 20) with rotation operation of the turntable 20. FIG. The gas supply device 11 is a bag held by a holding unit 12 that moves along this path (specifically, a holding unit 12 that moves from position E to position G in FIG. 1). Gas is supplied to the inside of the machine. According to such a method, when the gas blowing nozzle is disposed above the position of the bag held by the holding unit 12 when the rotary table 20 is stopped, and the bag is positioned directly below the nozzle. Compared with the method of supplying the gas into the bag by blowing the gas downward by the nozzle, the time during which the gas is supplied into the bag by the gas supply device 11 can be made relatively long. The internal gas can be replaced more reliably and stably. Moreover, in the packaging machine 10 of this Embodiment, as mentioned above, the head 16 of the gas supply apparatus 11, the air cylinder 14, etc. are attached to each holding member 12a of the holding part 12. FIG. As a result, the head 16 and the air cylinder 14 of the gas supply device 11 can be moved integrally with the holding unit 12.

  Moreover, in the packaging machine 10 of this Embodiment and the gas supply apparatus 11 provided in this packaging machine 10, they are the advance position which is the position which advanced the head 16 inside the bag, and the position which retracted from the inside of the bag. A head support portion (specifically, a support arm 13, a drive motor 18, an air cylinder 14, a rod-like member 15 and the like) is provided that is movably supported with respect to the retracted position. When the gas is supplied to the inside, the head 16 moves to the advanced position. In such a packaging machine 10 and the gas supply device 11 provided in the packaging machine 10, the head 16 is moved to the advanced position, which is the position advanced into the bag, so that the bag is filled with powder or the like. Even when the gas is filled, when the gas is supplied to the inside of the bag by the head 16, the material to be filled such as powder is prevented from rising from the bag.

  Moreover, in the packaging machine 10 of this Embodiment, when the head 16 moves to the advance position which is the position which advanced to the inside of a bag, the said head 16 is a predetermined position in the height direction of a bag (specifically, It is located below the central position in the height direction of the bag. In this case, since the head 16 is located at the lower position inside the bag, it is easy to expel the air in the gap between the objects to be filled and the air inside the bag when replacing the gas inside the bag. The gas replacement rate inside the bag can be further improved. Moreover, in the packaging machine 10 of this Embodiment, as mentioned above, the head 16 is moved below the predetermined position in the bag height direction by the air cylinder 14.

  In addition, the packaging machine by this Embodiment and the gas supply apparatus provided in this packaging machine are not limited to an aspect as mentioned above, A various change can be added.

  For example, in the above-described embodiment, the support arm 13 is rotated about the shaft member 13 a by the drive motor 18 in the gas supply device 11, but the support arm 13 is in contact with each holding member 12 a of the holding unit 12. It may be attached so as not to rotate. In this case, when the air cylinder 14 is retracting the rod-shaped member 15 upward, the head 16 attached to the tip of the rod-shaped member 15 is retracted above the bag mouth of the bag, It is necessary not to get in the way of bag movement. Even in such a gas supply device, the same operational effects as those of the above-described embodiment can be obtained. In the aspect in which the support arm 13 is rotated about the shaft member 13a by the drive motor 18, the head 16 is not in the bag when the head 16 is in the retracted position retracted from the inside of the bag as shown in FIG. Since it is not located in the upper space of the bag mouth, it becomes easy to perform an operation of supplying an object to be filled such as powder into the inside of the bag by the object supply device 26.

  Further, it is not necessary to provide two heads 16 of the gas supply device 11 for each holding unit 12 (that is, for a bag held by the holding unit 12). Only one head 16 of the gas supply device 11 may be provided for each holding portion 12, or three or more heads 16 of the gas supply device 11 may be provided for each holding portion 12. Also good.

  Further, the head 16 is not limited to a cylindrical shape. As long as a plurality of fine holes are provided and the gas to be blown can be dispersed, the shape of the head 16 can be various shapes other than the columnar shape.

  In the above-described embodiment, the example in which the head 16 of the gas supply device 11, the air cylinder 14, and the like are attached to each holding member 12 a of the holding unit 12 is described, but the present invention is not limited to such an example. . The structure of the packaging machine 10a which concerns on a modification is demonstrated using FIG. In the packaging machine 10a according to the modification as shown in FIG. 5, the gas supply device 71 for supplying gas to the inside of the bag is not attached to each holding member 12a of the holding unit 12, but instead in FIG. It is provided at a location corresponding to the position E of the bag.

  In the packaging machine 10a according to the modification shown in FIG. 5, the gas supply device 71 includes a pair of columnar heads 76 provided with a plurality of fine holes, and a pair of heads 76 each attached to the tip thereof. It has a rod-shaped member 75, a pair of air cylinders 74 for moving the rod-shaped members 75 back and forth, and a pair of support members 72 for supporting the air cylinders 74. Each support member 72 has a bag position E in FIG. It is provided at a position corresponding to the fixed position.

  Here, the head 76 is made of, for example, a resin sintered body or a metal sintered body in the same manner as the head 16 of the gas supply device 11 shown in FIGS. 2 to 4, and there are many such resin sintered bodies and metal sintered bodies. The micropores are randomly provided. Further, a supply pipe (not shown) for supplying gas to the head 76 is provided inside the rod-like member 75, and the head 76 is connected from the gas supply pipe 82 via the supply pipe inside the rod-like member 75. The gas is blown out from the micro holes of the head 76 by supplying the gas.

  The air cylinder 74 moves between a position where the head 76 is advanced into the bag by moving the rod-like member 75 attached to the tip of the head 76 in the vertical direction and a position where the head 76 is retracted upward from the inside of the bag. It is designed to move. Specifically, when the air cylinder 74 extends the rod-like member 75 downward, the head 76 attached to the tip of the rod-like member 75 also moves downward within the bag, and the head 76 is located inside the bag within the bag. It comes to be located below a predetermined position in the height direction (specifically, a central position in the height direction of the bag). Thus, the air cylinder 74 moves the head 76 downward, so that the head 76 is positioned at a lower position inside the bag.

  As shown in FIG. 5, a gas supply source 80 is provided at the base end of the gas supply pipe 82, and inert gas such as carbon dioxide and nitrogen is supplied by the gas supply source 80 through the gas supply pipe 82. A gas composed of a gas is supplied to the head 76.

  In the packaging machine 10a according to such a modified example, after the bag is filled with an object to be filled such as powder at the position D in FIG. 5, when the bag stops at the position E in FIG. By moving the rod-shaped member 75 downward, the head 76 attached to the tip of the rod-shaped member 75 moves to the advanced position where it has advanced into the bag. At this time, the head 76 is positioned at a lower position inside the bag. Then, gas is supplied to the inside of the bag by the head 76 moved to the lower position inside the bag, so that the gas inside the bag is replaced. Then, the air cylinder 74 retracts the rod-shaped member 75 upward, so that the head 76 attached to the tip of the rod-shaped member 75 moves from the inside of the bag to the retracted position, and then from the position E in FIG. The bag moves to position F.

  Even in the packaging machine 10a according to the modification shown in FIG. 5 and the gas supply device 71 provided in the packaging machine 10a, the packaging machine 10 as shown in FIGS. 1 to 4 and the gas provided in the packaging machine 10 are used. Similarly to the supply device 11, the head 76 having a plurality of fine holes is provided in the gas supply device 71, so that the head 76 is supplied from a gas supply unit including a gas supply source 80 and a gas supply pipe 82. Even if the bag is filled with an object to be filled such as powder, the gas is covered with the powder when the head 76 supplies the gas to the inside of the bag. The filling material is prevented from rising from the bag.

  Moreover, in the packaging machine 10a which concerns on the modification as shown in FIG. 5, and the gas supply apparatus 71 provided in this packaging machine 10a, it is provided in the packaging machine 10 as shown in FIG. Similarly to the gas supply device 11, a head support portion (specifically, a head support unit that movably supports the head 76 between an advanced position where the head 76 is advanced into the bag and a retracted position where the head 76 is retracted from the bag) Are provided with a support member 72, an air cylinder 74, a rod-like member 75, etc., and when the gas is supplied into the bag by the gas supply device 71, the head 76 moves to the advanced position. Yes. In the packaging machine 10a according to such a modification and the gas supply device 71 provided in the packaging machine 10a, the head 76 is moved to the advanced position which is the position advanced into the bag, so that the powder or the like is transferred to the bag. Even when the filling material is filled, when the gas is supplied to the inside of the bag by the head 76, the filling material such as powder is suppressed from rising from the bag.

  Further, in a packaging machine (not shown) according to a further modification, after the gas inside the bag is replaced by the gas supply device, the bag mouth of the bag is sandwiched between a pair of rollers that contact each other and temporarily sealed. It may be like this. Specifically, for example, a plurality of pairs of rollers that come into contact with the movement path of the bag mouth of the bag between the position G and the position H in FIG. 1 are provided, and the bag is positioned while being held by the holding unit 12. By passing between these rollers when moving from G to position H, the bag mouth of the bag is sandwiched between a pair of rollers and temporarily sealed. Thereafter, the bag mouth of the bag is heated and sealed by a pair of hot plates 30 at a position H in FIG.

DESCRIPTION OF SYMBOLS 10, 10a Packaging machine 11 Gas supply device 12 Holding part 12a Holding member 13 Support arm 13a Shaft member 14 Air cylinder 15 Rod-like member 16 Head 18 Drive motor 20 Rotary table 22 Printing device 24 Opening device 26 Filling material supply device 28 Tapping device 30 Hot plate 32 Cooling plate 40 Bag supply device 50 Discharge chute 60 Gas supply source 62 Gas supply tube 64 Rotating member 66 Gas supply tube 71 Gas supply device 72 Support member 74 Air cylinder 75 Bar member 76 Head 80 Gas supply source 82 Gas supply tube

Claims (15)

A holding part for holding the bag;
A to-be-filled material supply unit for filling a to-be-filled material inside the bag held by the holding unit;
A gas supply device for substituting the gas in the bag by supplying gas to the inside of the bag to which the filling material is supplied by the filling material supply unit;
With
The said gas supply apparatus is a packaging machine which has the head provided with the several fine hole, and the gas supply part which supplies gas to the said head. The holding part is adapted to move along an annular path,
The packaging machine according to claim 1, wherein the gas supply device is configured to supply gas into the bag held by the holding unit moving along the path.   The packaging machine according to claim 2, wherein the gas supply device is attached to the holding portion. The gas supply device has a head support portion that supports the head movably between an advanced position that is a position where the head has advanced into the bag and a retracted position that is a position where the head is retracted from the inside of the bag,
The packaging machine according to any one of claims 1 to 3, wherein when the gas is supplied into the bag by the gas supply device, the head moves to the advance position.   The packaging machine according to claim 4, wherein when the head moves to the advance position, the head is positioned below a predetermined position in the height direction of the bag.   The packaging machine according to claim 5, wherein the head support portion includes a cylinder that moves the head forward and backward, and the cylinder moves the head downward from a predetermined position in the height direction of the bag. . A holding part for holding the bag;
A to-be-filled material supply unit for filling a to-be-filled material inside the bag held by the holding unit;
It has a head which supplies gas to the inside of the bag to which the filling material is supplied by the filling material supply unit, and the gas in the bag is replaced by supplying gas to the inside of the bag by the head. A gas supply device;
With
The gas supply device has a head support portion that supports the head movably between an advanced position that is a position where the head has advanced into the bag and a retracted position that is a position where the head is retracted from the inside of the bag,
The packaging machine is configured to move the head to the advanced position when gas is supplied into the bag by the gas supply device.   The packaging machine according to claim 7, wherein when the head moves to the advance position, the head is positioned below a predetermined position in the height direction of the bag.   The packaging machine according to claim 8, wherein the head support part includes a cylinder that moves the head forward and backward, and the cylinder moves the head downward from a predetermined position in the height direction of the bag. . The holding part is adapted to move along an annular path,
The packaging according to any one of claims 7 to 9, wherein the gas supply device is configured to supply a gas to the inside of a bag held by the holding unit moving along the path. Machine.   The packaging machine according to claim 10, wherein the gas supply device is attached to the holding unit. A gas supply device for supplying gas into the bag,
A head provided with a plurality of fine holes;
A gas supply unit for supplying gas to the head;
With
A gas supply device in which gas is blown from the fine holes of the head by supplying gas from the gas supply unit to the head. A gas supply device for supplying gas into the bag,
A head for supplying gas into the bag;
A gas supply unit for supplying gas to the head;
A head support portion that supports the head movably between an advance position that is a position where the head has advanced into the bag and a retract position that is a position retracted from the inside of the bag;
With
The gas supply device, wherein when the gas is supplied into the bag by the gas supply device, the head moves to the advanced position. A step of holding the bag by the holding unit;
Filling the object to be filled into the bag held by the holding unit;
A step of replacing the gas in the bag by supplying the gas to the inside of the bag to which the filling material is supplied by a head provided with a plurality of fine holes;
A packaging method comprising: A step of holding the bag by the holding unit;
Filling the object to be filled into the bag held by the holding unit;
Moving the head for supplying gas to the inside of the bag to the advanced position, which is the position advanced to the inside of the bag;
A step of replacing the gas in the bag by supplying the gas to the inside of the bag supplied with the filling material by the head moved to the advance position;
A packaging method comprising:

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