JP2012062070A - Bagging and packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bagging and packaging device capable of preventing an article from being bit.SOLUTION: The bagging and packaging device includes: a former 120 with an opening 124 at its upper part for making a belt-like packaging material Fmc into a tubular shape; and a conveying portion for conveying the tubular packaging material Fmc. The bagging and packaging device repeats a packaging cycle of: sealing a lower end of the tubular packaging material Fmc; filling articles within the packaging material Fmc with its lower end sealed; and sealing an upper end of the tubular packaging material Fmc within which the articles have been filled. The bagging and packaging device includes: a suction unit 180 which sucks gas from the inside of the tubular packaging material Fmc with its lower end sealed; and a control unit for operating and stopping the gas sucking by the suction unit 180 during one packaging cycle.

Description

  The present invention relates to a bag making and packaging apparatus.

  2. Description of the Related Art Conventionally, a bag making and packaging apparatus is known in which an article such as potato chips is filled in a bag with a predetermined weight and packaged (see, for example, Patent Documents 1 and 2).

  Patent Document 1 is composed of an inner cylinder connected to a filling hopper, an outer cylinder having an intake duct, and a middle cylinder between them, the bottom between the middle cylinder and the inner cylinder is closed, and the upper part is a blower There is disclosed a bag-filling and packaging apparatus that is connected via an air supply port, and in which a plurality of air-jet ports are opened in communication with the inner cylinder.

  In Patent Document 2, a plurality of air escape grooves extending over the entire length in the axial direction of the cylindrical body are formed on the outer peripheral surface of the bag-making cylinder, and the upper exposed portion of the bag-making cylinder is covered with an annular member. The lower end of the member is inserted into the upper end opening of the tubular packaging film, and a ring groove communicating with all the air escape grooves is formed in the inner peripheral surface of the annular member, and an intake pipe for air intake is provided in the ring groove Is disclosed.

Japanese Utility Model Publication No. 4-118304 Japanese Utility Model Publication No.59-186201

However, in the bag-filling and packaging apparatus described in Patent Documents 1 and 2, when a bulky article such as potato chips is placed in the packaging material, the article is bitten when the upper end of the packaging material is sealed. There was a problem that a seal failure occurred.
In particular, when the amount of packaging material used is reduced and the content of the article is not changed, there is no room in the space for accommodating the article, and the occurrence of biting of the article becomes significant.

  Therefore, an object of the present invention is to provide a bag making and packaging apparatus capable of preventing an article from being bitten.

  A bag making and packaging apparatus according to the present invention includes a former having an opening at the top, and forming a strip-shaped packaging material into a cylindrical shape, and a transport unit that conveys the cylindrical packaging material. A bag making and packaging apparatus that repeats a packaging cycle in which a lower end of a material is sealed, an article is filled in a packaging material in which the lower end is sealed, and an upper end of a cylindrical packaging material filled with the article is sealed. An air intake portion that sucks in gas from the sealed cylindrical packaging material, and a control portion that operates and stops the gas intake operation by the air intake portion within one packaging cycle.

According to the above configuration, by operating the gas intake operation by the intake portion, the gas is sucked from the cylindrical packaging material, and the bag width of the cylindrical packaging material is reduced. Thereafter, by stopping the gas intake operation by the intake portion, the gas flows into the cylindrical packaging material due to the lower inertial movement of the upper gas, and the bag width of the cylindrical packaging material increases. In this way, the bag width of the cylindrical packaging material is changed. That is, the bag width of the non-contact cylindrical packaging material can be increased. Thus, by increasing the bag width in the cylindrical packaging material, the bulk of the article filled in the cylindrical packaging material can be reduced. As a result, when the upper end of the tubular packaging material is sealed, the biting of the article can be prevented.
In addition, by operating and stopping the intake operation within one packaging cycle, the bag width of the cylindrical packaging material is reduced and increased. That is, the cylindrical packaging material vibrates by the operation and stop of the intake operation. Thereby, the vibration propagates to the article filled in the cylindrical packaging material, and the bulk of the article is reduced. As a result, when the upper end of the tubular packaging material is sealed, the biting of the article can be prevented.

  In the bag making and packaging apparatus, the operation and stop of the intake operation are repeated a plurality of times within one packaging cycle.

According to the above configuration, when the intake operation is performed a plurality of times within one packaging cycle, the amount of gas in the cylindrical packaging material changes, and the packaging material vibrates. Thereby, the vibration propagates to the article in the cylindrical packaging material, and the volume of the article filled in the cylindrical packaging material can be further reduced.
Further, an article (a fine article (for example, a residue such as potato chips)) adhering to the inner peripheral surface of the cylindrical packaging material can be dropped downward by the vibration of the cylindrical packaging material. As a result, when the upper end of the cylindrical packaging material is sealed, the biting of the article can be reliably prevented.

  In the bag making and packaging apparatus, the operation time of the intake operation is longer than the stop time of the intake operation.

  According to the above configuration, by sucking the gas in the cylindrical packaging material for a long time, it is possible to impart sufficient vibration to the cylindrical packaging material. Thereby, the bulk of the article filled in the cylindrical packaging material can be further reduced.

  In the bag making and packaging apparatus, the air intake unit performs air intake before an article is put into a cylindrical packaging material whose lower end is sealed.

  According to the above configuration, even when the falling article forms a plug and increases the pressure in the cylindrical packaging material, the lower end is sealed before the article is put into the cylindrical packaging material. By inhaling gas from the inside of the cylindrical packaging material, an increase in pressure in the cylindrical packaging material can be suppressed. Thereby, since it can suppress that the fall speed of articles | goods falls, it becomes possible to implement | achieve the speed-up of a bag making operation | work.

  The bag making and packaging apparatus further includes a gas ejection portion that intermittently ejects gas at a lower portion of the former.

  According to the said structure, the bag width of a cylindrical packaging material can be expanded by ejecting gas intermittently in a cylindrical packaging material. Thus, by increasing the bag width in the cylindrical packaging material, the bulk of the article filled in the cylindrical packaging material can be reduced. As a result, when the upper end of the cylindrical packaging material is sealed, it is possible to further prevent the article from being bitten.

  The bag making and packaging apparatus further includes a gas supply unit that supplies an inert gas to the upper portion of the former after the article is dropped.

  According to the above configuration, the gas filled together with the article is replaced with the inert gas on the upstream side of the former. Thereby, since articles | goods are filled in the cylindrical packaging material with the said inert gas, it can suppress that the inert gas filling rate in a cylindrical packaging material falls.

It is the perspective view which showed the whole structure of the bag making packaging apparatus which concerns on 1st Embodiment of this invention. It is the perspective view which showed the detail of the former | foamer of the bag making packaging apparatus shown in FIG. 1, and its peripheral part. It is the model front view which showed the detail of the former | foamer of the bag making packaging apparatus shown in FIG. 1, and its peripheral part. It is sectional drawing which showed the internal structure of the tube of the bag making packaging apparatus shown in FIG. It is a control block diagram of the bag making packaging apparatus shown in FIG. It is the schematic diagram which showed the operation | movement and stop of the intake operation within the packaging cycle in the bag making packaging apparatus shown in FIG. It is a schematic diagram for demonstrating the effect in the bag making packaging apparatus shown in FIG. It is the schematic diagram which showed the intake operation | movement and the blowing operation | movement in the packaging cycle in the bag making packaging apparatus which concerns on 2nd Embodiment of this invention. It is the schematic diagram which showed the detail of the former | foamer of the bag making packaging apparatus which concerns on 3rd Embodiment of this invention, and its peripheral part. It is the schematic diagram which showed the detail of the former | foamer of the bag making packaging apparatus which concerns on 4th Embodiment of this invention, and its peripheral part. It is sectional drawing which showed the internal structure of the tube which concerns on the 1st modification of this invention, and a 2nd modification. It is a time chart of the air intake operation | movement and blowing operation | movement of the bag making packaging apparatus which concerns on the modification of this invention.

(First embodiment)
[Overall configuration of bag making and packaging equipment]
As shown in FIGS. 1 and 2, the bag making and packaging apparatus 100 according to the present embodiment continuously puts the product C into the bag by forming the belt-like film F into a bag shape and putting the article into the film and sealing it. This is a bag making and packaging device to be generated. The bag making and packaging apparatus 100 is, for example, a bag making and packaging apparatus that wraps food such as potato chips (hereinafter referred to as a packaged body B) with a predetermined weight in a film, and in the film, corrosion or In order to prevent oxidation, an inert gas such as nitrogen and argon gas is enclosed. The bag making and packaging apparatus 100 mainly transports the film supply unit 110 that supplies the film F, the former 120 that forms the film F that is sent in a strip shape into a cylindrical shape, and the film Fmc that is formed into a cylindrical shape downward. Pull-down belt mechanism 130, vertical seal mechanism 140 that vertically seals the overlapping portion of the tubular film Fmc, lateral seal mechanism 150 that horizontally seals the tubular film Fmc, and a bag shape filled with the package B A discharge chute 160 for discharging the product C to the downstream side, an intake portion 170 (see FIG. 3) for sucking gas from inside the tubular film Fmc, and a gas ejection portion 180 for supplying an inert gas into the tubular film Fmc. (See FIG. 3) and a control unit 190 (see FIG. 5) for controlling each actuator of the bag making and packaging apparatus 100.

  A combination weighing device 101 is provided above the bag making and packaging device 100 as shown in FIG. The combination weighing device 101 weighs the package body B by a predetermined weight in a plurality of hoppers, then combines and sequentially discharges these weighing values so as to have a predetermined total weight. As shown in FIG. 2, the package B that has reached the total weight passes through the chute 102 of the combination weighing device 101 and is dropped into the opening 124 of the former 120 disposed below.

[Film supply unit]
As shown in FIG. 1, the film supply unit 110 is provided to supply a strip-shaped film F to the former 120. A roll (not shown) around which the film F is wound is set in the film supply unit 110, and the film F is fed out from the roll. The film F is a heat-meltable film such as a synthetic resin.

[Former]
As shown in FIGS. 2 and 3, the former 120 is provided for forming the film F fed in a strip shape into a cylindrical shape and for introducing the packaged body B into the cylindrical film Fmc. . The former 120 includes a sailor 121 that forms the strip film F into a tubular film Fmc, and a tube 122 that wraps the tubular film Fmc around the outer periphery and hangs down.

  As shown in FIGS. 2 and 3, the sailor 121 is continuously provided on the tube 122. The shape of the sailor 121 is such that the strip-shaped film F sent from the film supply unit 110 is formed into a cylindrical shape when passing between the sailor 121 and the tube 122.

As shown in FIGS. 2 and 3, the tube 122 has a cylindrical shape, and is provided with openings 124 and 125 at the upper end and the lower end, respectively. The package body B weighed to a predetermined weight by the combination weighing device 101 is put into the opening 124 provided at the upper end of the tube 122. And the to-be-wrapped body B thrown in from the said opening part 124 passes through the inside of the cylindrical tube 122, is dropped from the opening part 125 provided in the lower end of the tube 122, and is filled in the cylindrical film Fmc. The In addition, a guide 123 is provided at the lower end of the tube 122 so as to be inserted into the tubular film Fmc and to introduce the package B into the tubular film Fmc.
And in this embodiment, as shown in FIG. 4, inside the tube 122, the channel | path L1 through which the to-be-packaged body B passes, the flow path L2 through which the air inhaled from the cylindrical film Fmc passes, and a cylindrical shape A flow path L3 through which an inert gas supplied into the film Fmc passes is formed.

[Pull-down belt mechanism]
As shown in FIG. 2, the pull-down belt mechanism 130 is a mechanism that sucks and conveys the tubular film Fmc wound around the outer periphery of the tube 122, and two pull-down belt mechanisms 130 are provided across the tube 122. The pull-down belt mechanism 130 mainly includes a driving roller 131, a driven roller 132, and a belt 133 having a suction function.

[Vertical seal mechanism]
As shown in FIG. 2, the vertical sealing mechanism 140 is a mechanism that seals the overlapping portion of the tubular film Fmc wound around the tube 122 in the vertical direction (arrow Z direction). Here, the “longitudinal direction” is a direction along the conveyance direction of the tubular film Fmc, and in the present embodiment, is a vertical direction (arrow Z direction). The vertical sealing mechanism 140 is provided on the side of the tube 122.

[Horizontal seal mechanism]
As shown in FIGS. 2 and 3, the horizontal sealing mechanism 150 is a mechanism that seals the tubular film Fmc in the horizontal direction (X direction) below the tube 122. Here, the “lateral direction” is a direction intersecting the transport direction of the tubular film Fmc, and in the present embodiment, is a horizontal direction (arrow X direction). The horizontal sealing mechanism 150 is disposed below the former 120, the pull-down belt mechanism 130, and the vertical sealing mechanism 140. The horizontal sealing mechanism 150 includes a pair of sealing jaws 151 and 152 that sandwich the tubular film Fmc. These sealing jaws 151 and 152 move symmetrically along a trajectory such as a substantially D-shape so as not to hinder continuous conveyance of the film Fmc, and are pressed together when sealing the tubular film Fmc in the lateral direction. The
Further, the horizontal seal mechanism 150 has a built-in cutter (not shown). This cutter separates from the subsequent (upper) tubular film Fmc at the center position of the portion sealed by the sealing jaws 151 and 152.

[Discharge chute]
As shown in FIG. 1, the discharge chute 160 is provided below the horizontal seal mechanism 150, and the product C separated by the cutter of the horizontal seal mechanism 150 is transferred to a transport device (for example, a belt conveyor) in a subsequent process. ) (Not shown). The discharge chute 160 is a slope formed of a metal plate or the like, and guides the product C to a transport device (not shown) using gravity.

[Intake section]
As shown in FIG. 3, the air intake unit 170 is provided to inhale gas from the inside of the tubular film Fmc with the lower end sealed. The intake portion 170 includes a blower 171 and an intake duct 172 provided inside the tube 122. As shown in FIG. 4, the intake duct 172 is formed by attaching a flat plate inside the tube 122. The blower 171 is driven based on a control signal transmitted from the control unit 190 described later, and sucks gas from the tubular film Fmc. The sucked gas passes through the intake duct 172 and is discharged to the outside of the tube 122.

[Gas outlet]
As shown in FIG. 3, the gas ejection part 180 is provided to supply an inert gas such as nitrogen gas and argon gas to the tubular film Fmc whose lower end is sealed. The gas ejection unit 180 includes a gas supply source 181 and a supply duct 182 provided inside the tube 122. As shown in FIG. 4, the supply duct 182 is formed by attaching a flat plate inside the tube 122. The gas supply source 181 is driven based on a control signal transmitted from a control unit 190 described later, and supplies an inert gas into the tubular film Fmc. This inert gas is blown out from the gas supply source 181 through the supply duct 182 and into the tubular film Fmc.

[Control unit]
As shown in FIG. 5, the control unit 190 is communicably connected to the film supply unit 110, the pull-down belt mechanism 130, the vertical sealing mechanism 140, the horizontal sealing mechanism 150, the operation switch 103, and the like. Control the behavior. Specifically, the control unit 190 adjusts the rotational speed of the seal jaws 151 and 152 of the lateral seal mechanism 150 and the cylinders of the seal jaws 151 and 152 in accordance with the feed speed of the tubular film Fmc downward by the pull-down belt mechanism 130. The pressing operation to the film Fmc is controlled. Further, the control unit 190 controls the operation of each actuator of the bag making and packaging apparatus 100 based on a signal related to the operation of the operation switch 103.

  The control unit 190 is communicably connected to the blower 171 and the gas supply source 181. By controlling these, the inert gas is supplied into the cylindrical film Fmc whose lower end is sealed, The gas in the tubular film Fmc is sucked. And in this embodiment, the control part 190 is the cycle (henceforth a "packaging cycle") after sealing jaw 151,152 seals the lower end of the cylindrical film Fmc until the upper end of the said cylindrical film Fmc is sealed. ) To control the blower 171 of the intake section 170 to start and stop the intake operation for sucking gas from the tubular film Fmc.

  Specifically, as shown in FIG. 6, the control unit 190 controls the blower 171 so as to suck in gas for about 150 msec from the moment when the sealing jaws 151 and 152 are separated from the tubular film Fmc. Thereafter, the blower 171 is controlled so as to stop the intake of gas for about 150 msec. That is, in this embodiment, the lower end of the tubular film Fmc is sealed, the packaged body B is filled in the tubular film Fmc with the lower end sealed, and the upper end of the tubular film Fmc filled with the packaged body B is filled. In one packaging cycle for sealing, the intake operation is activated for about 150 msec, and the intake operation is stopped for about 150 msec.

[Operation of bag making and packaging equipment]
The operation of the bag making and packaging apparatus will be described with reference to FIGS.
The belt-like film F sent from the film supply unit 110 to the former 120 is wound around the tube 122 from the sailor 121 and formed into a cylindrical shape, and is conveyed downward by the pull-down belt mechanism 130 as it is. The tubular film Fmc is in a state where both ends are overlapped on the peripheral surface in a state of being wound around the tube 122, and the overlapped portion is sealed in the vertical direction by the vertical seal mechanism 140.

  The cylindrical film Fmc that is sealed in the vertical direction and has a cylindrical shape passes through the tube 122 and descends to the horizontal sealing mechanism 150. And the lower end of the cylindrical film Fmc is sealed by the sealing jaws 151 and 152 in the horizontal direction.

  On the other hand, the package B is put into the opening 124 of the former 120 from the combination weighing device 101 and falls through the inside of the tube 122 (passage L1 (see FIG. 4)) simultaneously with the movement of the tubular film Fmc. Come. At this time, the inert gas is supplied to the inside of the tubular film Fmc through the flow path L3 of the supply duct 182.

  When the tubular film Fmc is filled with the package B and the inert gas, the upper ends of the tubular film Fmc are sealed in the lateral direction by the sealing jaws 151 and 152. Thereby, the cylindrical film Fmc is formed in a bag shape. At this time, the cutting process by the cutter incorporated in the seal jaws 151 and 152 is performed. Thereby, it isolate | separates as the product C from the subsequent cylindrical film Fmc. Thereafter, the above operation is repeated and bag making is performed continuously. The separated product C slides down the discharge chute 160 and is transported by a transport device (not shown), and is transported to a device such as a checker in a subsequent process.

[Operations related to intake operation]
When packaging a packaged body B such as potato chips, the bulk of the packaged body B such as potato chips is increased in the tubular film Fmc, and when the upper end of the tubular film Fmc is sealed, The body B may be bitten and seal failure may occur. Therefore, in the bag making and packaging apparatus 100 according to the present embodiment, the volume of the packaged body B in the tubular film Fmc is reduced by sucking gas from the tubular film Fmc. In addition, (a)-(f) which showed the cylindrical film Fmc of FIG. 6, seal jaws 151,152, etc. is the state at the time of the arrows (a)-(f) shown in the time chart of FIG. 6, respectively. Corresponds to the figure.

  First, as shown in FIG. 6A, when the lower end of the tubular film Fmc is sealed by the horizontal sealing mechanism 150 and the packaged body B is inserted, the packaged body B such as potato chips becomes bulky. It will be accommodated in the tubular film Fmc in a high state. Here, in the present embodiment, the cylindrical shape passes through the flow path L2 (see FIG. 4) of the intake duct 172 for about 150 msec from the moment when the sealing jaws 151 and 152 of the lateral sealing mechanism 150 are separated from the cylindrical film Fmc. Gas is sucked from the film Fmc. Thereby, as shown in FIG.6 (b), the side surface of the cylindrical film Fmc is drawn inside, and the said cylindrical film Fmc vibrates. As a result, the vibration of the tubular film Fmc is transmitted to the packaged body B in the tubular film Fmc, and the bulk of the packaged body B becomes low. Moreover, as shown in FIG.6 (b), when the side surface of the cylindrical film Fmc is drawn inside, the inner side surface of the said cylindrical film Fmc pushes the to-be-packaged body B, and the bulk of the to-be-packaged body B is low. Become.

  Then, as shown in FIG. 6C, when about 150 msec elapses from the moment when the seal jaws 151 and 152 are separated, the above-described intake operation is immediately stopped. In the present embodiment, the intake operation is stopped for about 150 msec after the operation of the intake operation is completed. Thereby, the gas which exists in the upper part of the former 120 flows in into the cylindrical film Fmc by the downward inertial movement of the upper gas, and the bag width of the cylindrical film Fmc increases. Thereby, the bulk of the package B is reduced. At this time, since the bag width of the tubular film Fmc whose bag width has decreased due to the operation of the intake operation increases, the side surface of the tubular film Fmc vibrates. As a result, the vibration of the tubular film Fmc is transmitted to the packaged body B in the tubular film Fmc, and the bulk of the packaged body B becomes low. When the intake operation is stopped, as shown in FIG. 6 (d), the sealing jaws 151 and 152 are close to each other in order to seal the tubular film Fmc, and as shown in FIG. 6 (e), The tubular film Fmc is sandwiched between the sealing jaws 151 and 152. During the sealing period of the tubular film Fmc by the seal jaws 151, 152, since tension is applied to the tubular film Fmc, the operation of the intake operation is stopped in this embodiment. Thereby, it can suppress that the seal part of cylindrical film Fmc becomes a wrinkle.

  Thereafter, as shown in FIG. 6 (f), the tubular film Fmc is cut by the sealing jaws 151 and 152, and the product C is dropped downward. At this time, the package B is loaded into the tubular film Fmc from the chute 102 at the top of the former 120. Then, the stop of the intake operation for about 150 msec is completed. Thereafter, similarly, the operation of the intake operation and the stop of the intake operation are repeated.

<Effect in this embodiment>
In the above-described embodiment, by operating the gas intake operation by the intake unit 170, the gas is sucked from the tubular film Fmc, and the bag width of the tubular film Fmc is reduced. Thereafter, by stopping the gas intake operation by the air intake unit 170, the gas flows into the tubular film Fmc due to the lower inertial movement of the upper gas, and the bag width of the tubular film Fmc increases. In this way, the bag width of the tubular film Fmc is changed. That is, the bag width of the tubular film Fmc can be increased without contact. Thus, by increasing the bag width of the tubular film Fmc, the volume of the packaged body B filled in the tubular film Fmc can be reduced. As a result, when the upper end of the tubular film Fmc is sealed, the packaged body B can be prevented from being bitten.

In particular, in the present embodiment, as shown in FIG. 7, immediately after the gas suction operation is switched from operation to stop, the flow of gas sucked from the intake duct 172 disappears. Therefore, a large downward flow is generated. Thereby, the bag width of the tubular film Fmc is increased, and the bulk of the packaged body B filled in the tubular film Fmc can be reduced.
Moreover, when the large downward flow described above is generated, the filling speed of the packaging body B into the tubular film Fmc is increased, and the speed of the bag making operation can be realized.

Moreover, in this embodiment, the bag width | variety of the cylindrical film Fmc reduces and increases by performing operation | movement and a stop of an air intake operation | movement within 1 packaging cycle. That is, the tubular film Fmc vibrates by the operation and stop of the intake operation. Thereby, the said vibration propagates also to the to-be-packaged body B with which the cylindrical film Fmc is filled, and the volume of the to-be-packaged body B becomes low. As a result, when the upper end of the tubular film Fmc is sealed, the packaged body B can be prevented from being bitten.
Further, since the packaged body B (a fine article (for example, a chip such as potato chips)) that adheres to the inside of the tubular film Fmc falls downward due to the vibration of the tubular film Fmc, the tubular film Fmc. When the upper end of the package is sealed, the packaged body B can be prevented from biting.

  In the present embodiment, sufficient vibration can be imparted to the tubular film Fmc by sucking the gas in the tubular film Fmc for a long time (about 150 msec). Thereby, it becomes possible to make the volume of the to-be-packaged body B in the cylindrical film Fmc low, and to prevent the to-be-packaged body B from being bitten.

  Further, in the present embodiment, even when the package B to be dropped forms a plug and increases the pressure in the tubular film Fmc, before the package B is put into the tubular film Fmc, By sucking in gas from the inside of the tubular film Fmc whose lower end is sealed, an increase in pressure in the tubular film Fmc can be suppressed. Thereby, since it can suppress that the fall speed of the to-be-packaged body B falls, it becomes possible to implement | achieve speed-up of a bag making operation | work.

<Correspondence between each component of claims and each part of the embodiment>
In the above embodiment, the bag making and packaging apparatus 100 corresponds to “bag making and packaging apparatus”, the belt-like film F corresponds to “band-like packaging material”, the former 120 corresponds to “former”, and the tubular film Fmc corresponds to “cylindrical packaging material”, the opening 124 corresponds to “opening”, the pull-down belt mechanism 130 corresponds to “conveyance unit”, and the packaged body B corresponds to “article”, The intake section 170 corresponds to an “intake section”, the control section 190 corresponds to a “control section”, and the gas ejection section 180 corresponds to a “gas ejection section”.

(Second Embodiment)
In the first embodiment, the example in which the operation and stop of the gas intake operation are performed only once in one packaging cycle has been described. However, in the second embodiment, the operation of the gas intake operation is performed in one packaging cycle. A bag making and packaging apparatus that performs a plurality of times of stopping and stopping will be described. The bag making and packaging apparatus according to the second embodiment has the same configuration as that of the bag making and packaging apparatus 100 according to the first embodiment. The operation and the blowing operation will be described in detail.

[Operations related to intake and blowout operations]
In the first embodiment, the example of controlling the operation and stop of the gas intake operation has been described. However, in the second embodiment, not only the operation and stop of the gas intake operation but also the operation of the gas blowing operation are performed. And stop at the same time. The operation and stop of the gas blowing operation are performed by a gas ejection unit 180 that is provided below the former 120 and ejects gas (inert gas) intermittently. Hereinafter, this will be described in detail with reference to FIG. In addition, (a)-(e) which showed the cylindrical film Fmc of FIG. 8, seal jaw 151,152 grade | etc., Is the state at the time of arrow (a)-(e) shown in the time chart of FIG. 8, respectively. Corresponds to the figure.

  First, as shown in FIG. 8A, when the lower end of the tubular film Fmc is sealed by the horizontal sealing mechanism 150 and the packaged body B is inserted, the packaged body B such as potato chips becomes bulky. It will be accommodated in the tubular film Fmc in a high state. Here, in this embodiment, the gas from the tubular film Fmc passes through the flow path L2 (see FIG. 4) of the intake duct 172 for about 100 msec from the moment when the seal jaws 151 and 152 are separated from the tubular film Fmc. Is inhaled. Thereby, as shown to Fig.8 (a), the side surface of the cylindrical film Fmc is drawn inside, and the said cylindrical film Fmc vibrates. As a result, the vibration of the tubular film Fmc is transmitted to the packaged body B in the tubular film Fmc, and the bulk of the packaged body B becomes low. Moreover, as shown to Fig.8 (a), when the side surface of the cylindrical film Fmc is drawn inside, the inner side surface of the said cylindrical film Fmc pushes the to-be-packaged body B, and the bulk of the to-be-packaged body B is low. Become.

  When the operation of the intake operation for 100 msec is finished, as shown in FIGS. 8B and 8C, the operation of the intake operation and the operation of the blowing operation, and the operation of the intake operation and the operation of the blowing operation are stopped. It is done continuously. Thereby, after the side surface of the tubular film Fmc bulges outward, the side surface of the tubular film Fmc is immediately drawn inward. As a result, vibration propagates to the tubular film Fmc, and further, the vibration propagates to the packaged body B in the tubular film Fmc. Thereby, the volume of the to-be-packaged body B accommodated in the state with the high volume in the cylindrical film Fmc becomes low. In the present embodiment, the stop of the intake operation and the operation of the blowing operation shown in FIG. 8B are performed for about 30 msec, and the operation of the intake operation and the stop of the discharge operation shown in FIG. 50 msec. That is, in this embodiment, the operation time of the intake operation (about 50 msec) is longer than the operation time of the blowout operation (about 30 msec).

  The above-described operation of the intake operation and the stop of the blowing operation, and the repetition of the stop of the intake operation and the operation of the blow-out operation are continued until the moment when the sealing jaws 151 and 152 sandwich the tubular film Fmc. When the tubular film Fmc is sandwiched between the sealing jaws 151 and 152, the operation of the gas intake operation and the operation of the gas blowing operation are both stopped as shown in FIG. During the sealing period of the tubular film Fmc by the seal jaws 151, 152, since tension is applied to the tubular film Fmc, in this embodiment, both the operation of the intake operation and the operation of the blow-out operation are stopped. Thereby, it can suppress that the seal part of cylindrical film Fmc becomes a wrinkle. The operation of the intake operation and the stop of the blow-out operation are continued for a sealing period until the sealing jaws 151 and 152 are separated from each other with the tubular film Fmc interposed therebetween.

  In addition, during the sealing period described above, as shown in FIG. 8E, immediately after the package B passes through the intake port 173 of the intake duct 172 and the supply port 183 of the supply duct 182, the intake operation is stopped for a moment. And the blowing operation is performed. As described above, when the intake operation is stopped for a moment, the package B to be dropped due to the inertia of the flow is accelerated, and the blowing operation is operated only for a moment, thereby causing the falling package B to be further accelerated. be able to.

<Effect in this embodiment>
In the said 2nd Embodiment, in addition to the effect of 1st Embodiment, there exist the following effects.

  In the second embodiment, the operation and stop of the intake operation are performed a plurality of times within one packaging cycle, whereby the amount of gas in the tubular film Fmc changes, and the operation and stop of the intake operation are performed only once. The cylindrical film Fmc vibrates more than when performing. Thereby, the vibration is also propagated to the packaged body B in the tubular film Fmc, and the volume of the packaged body B filled in the tubular film Fmc can be reduced.

  Moreover, in 2nd Embodiment, the to-be-packaged body B (fine articles (for example, wastes, such as potato chips)) adhering to the internal peripheral surface of this cylindrical film Fmc by the vibration to the cylindrical film Fmc below. Can be dropped. As a result, when the upper end of the tubular film Fmc is sealed, the packaged body B can be prevented from being bitten.

  In the second embodiment, the bag width of the tubular film Fmc can be increased by intermittently ejecting gas into the tubular film Fmc. Thereby, the volume of the to-be-packaged body B with which it fills in the cylindrical film Fmc can be made low. As a result, when the upper end of the tubular film Fmc is sealed, the packaged body B can be prevented from being bitten.

  Further, in the second embodiment, unlike the first embodiment in which only the gas intake operation is performed, the gas injection unit 180 performs the inert gas blowing operation. That is, in this 2nd Embodiment, the bag width of the cylindrical film Fmc can be expanded reliably by blowing inactive gas in the cylindrical film Fmc. As a result, the volume of the packaged body B in the tubular film Fmc is reduced, and when the upper end of the tubular film Fmc is sealed by the sealing jaws 151 and 152, the packaged body B can be prevented from being bitten. .

(Third embodiment)
In the first and second embodiments described above, no reference has been made to the whereabouts of the gas sucked from the tubular film Fmc, but in the third embodiment, the gas sucked from the tubular film Fmc is used as the former 120. Supply to the top of the. Details will be described below. Since the third embodiment is the same as the first embodiment except that the shape of the duct is different, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is appropriately described. Omit.

  As shown in FIG. 9, the air intake part 170b of the bag making and packaging apparatus according to the third embodiment includes a blower 171b, an air intake duct 172b, and a circulating duct 173b. One end of the circulating duct 173 b is connected to the intake duct 172 b and the other end is connected to the opening 124 of the tube 122. As a result, the gas sucked from the tubular film Fmc passes through the intake duct 172b, then passes through the circulating duct 173b, and is supplied to the opening 124 at the upper portion of the former 120. Since the gas supplied into the tubular film Fmc is an inert gas, the gas sucked from the tubular film Fmc is also an inert gas. Accordingly, the inert gas is supplied to the opening 124 at the upper portion of the former 120 from the circulating duct 172b. The intake part 170b of this embodiment corresponds to a “gas supply part”.

<Effect in this embodiment>
In the said 3rd Embodiment, the gas descend | falling with the to-be-packaged body B is substituted by the inert gas in the upstream of the former 120 (opening part 124 of the upper part of the former 120). Thereby, it can suppress that the inert gas filling rate in the cylindrical film Fmc falls.

  In the third embodiment, since the inert gas in the tubular film Fmc can be reused, the amount of inert gas used can be reduced.

(Fourth embodiment)
In the third embodiment described above, the example in which the other end of the circulating duct 173b is connected to the tube 122 has been described. However, in the fourth embodiment, the circulating duct 173c is connected to the chute 102 of the combination weighing device 101. Details will be described below. Since the fourth embodiment is the same as the first embodiment except that the shape of the duct is different, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is appropriately described. Omit.

  As shown in FIG. 10, the intake part 170c of the bag making and packaging apparatus according to the fourth embodiment includes a blower 171c, an intake duct 172c, and a circulating duct 173c. One end of the circulating duct 173 c is connected to the intake duct 172 c, and the other end is connected to the chute 102 disposed on the top of the former 120. As a result, the gas sucked from the tubular film Fmc passes through the intake duct 172c, then passes through the circulating duct 173c, and is introduced into the chute 102. Since the gas supplied into the tubular film Fmc is an inert gas, the gas sucked from the tubular film Fmc is also an inert gas. Therefore, the inert gas is supplied into the chute 102 from the circulating duct 173c. The intake part 170c of this embodiment corresponds to a “gas supply part”.

<Effect in this embodiment>
In the fourth embodiment, in the chute 102 on the upstream side of the former 120, the gas descending together with the packaged body B is replaced with an inert gas. Thereby, it can suppress that the inert gas filling rate in the cylindrical film Fmc falls.

  In the fourth embodiment, since the inert gas in the tubular film Fmc can be reused, the amount of inert gas used can be reduced.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is indicated not only by the above description of the embodiments but also by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first embodiment, as shown in FIG. 4, an example in which one intake duct 172 and one supply duct 182 are provided in the tube 122 has been described. However, the present invention is not limited to this, and FIG. As shown in the first modified example shown in a), four ducts 172d may be provided inside the tube 122d, and as shown in the second modified example shown in FIG. Three ducts 172e may be provided inside. All of the ducts 172d according to the first modification may be intake ducts, one may be an intake duct and the remaining three may be supply ducts, two may be intake ducts, and the remaining two may be Supply ducts may be used, three may be intake ducts, and the remaining one may be supply ducts. Similarly, all of the ducts 172e according to the second modification may be intake ducts, one may be an intake duct and the other two may be supply ducts, or two may be intake ducts and the remaining. One of these may be a supply duct. In the first modification and the second modification, the positional relationship between the intake duct and the supply duct is not limited. That is, the intake ducts may be disposed adjacent to each other or may be disposed to face each other. Further, the supply ducts may be disposed adjacent to each other or may be disposed to face each other.

  When there are a plurality of intake ducts and / or exhaust ducts, the gas in the tubular film may be sequentially sucked from the plurality of intake ducts, or the gases may be sequentially sucked into the tubular film from the plurality of exhaust ducts. You may exhaust. Further, the gas in the cylindrical film may be sucked simultaneously from a plurality of intake ducts, or the gas may be exhausted into the cylindrical film simultaneously from a plurality of exhaust ducts.

  In the first embodiment, the example in which the operation time of the suction operation is 150 msec and the stop time of the suction operation is 150 msec has been described. However, the present invention is not limited to this, and the operation of the suction operation is performed within one packaging cycle. If stop is performed, the operation time of the suction time and the stop time of the suction operation are not limited to the above time. For example, the operation time of the suction operation may be 100 msec and the stop time of the suction operation may be 30 msec. At this time, the intake time is shortened. However, by increasing the suction amount of the blower, the cylindrical film Fmc can be sufficiently vibrated even with a short suction time.

  In the second embodiment, the gas blowing operation is stopped when the gas suction operation is operated, and the gas suction operation is stopped when the gas blowing operation is operated. The operation of the intake operation and the stop of the gas blowing operation are not necessarily simultaneous, and the operation of the gas blowing operation and the stop of the gas intake operation are not necessarily simultaneous. That is, the gas blowing operation may be performed after a predetermined time has elapsed after the operation of the gas suction operation is completed, or the gas intake operation is performed after the predetermined time has elapsed after the operation of the gas blowing operation is completed. You may do it.

  Specifically, as shown in FIG. 12A, the operation of the blowing operation may be started after a predetermined time (for example, about 10 msec) has elapsed since the suction operation was stopped. Immediately after the suction operation is stopped, the inside of the cylindrical film Fmc is at a low pressure due to the suction operation, so that the gas flows into the cylindrical film Fmc due to the downward inertial movement of the upper gas. For this reason, even if it does not operate blowing operation, gas can be introduce | transduced in the cylindrical film Fmc. As a result, the operating time of the blowing operation can be shortened, so that the running cost can be reduced and the energy consumption can be reduced.

  Further, as shown in FIG. 12B, the start period of the intake operation and the end period of the blow operation may overlap for a predetermined period (for example, about 10 ms).

DESCRIPTION OF SYMBOLS 100 Bag making packaging apparatus 120 Former 124 Opening part 130 Pull-down belt mechanism 170,170b, 170c Intake part 180 Gas ejection part 190 Control part

Claims (6)

A former having an opening and forming a belt-like packaging material into a cylindrical shape and a transport unit for conveying the tubular packaging material, the lower end of the cylindrical packaging material is sealed, and the lower end is sealed A bag making and packaging apparatus that repeats a packaging cycle in which an article is filled in the wrapped packaging material and the upper end of the cylindrical packaging material filled with the article is sealed,
An intake section for sucking gas from inside the cylindrical packaging material with the lower end sealed;
A bag making and packaging apparatus comprising: a control unit that performs operation and stop of the gas intake operation by the intake unit in the one packaging cycle.   The bag making and packaging apparatus according to claim 1, wherein the operation and the stop of the intake operation are repeated a plurality of times within one packaging cycle.   The bag making and packaging apparatus according to claim 1, wherein an operation time of the intake operation is longer than a stop time of the intake operation.   The bag making according to any one of claims 1 to 3, wherein the intake portion performs the intake before an article is put into the cylindrical packaging material whose lower end is sealed. Packaging equipment.   The bag making and packaging apparatus according to any one of claims 1 to 4, further comprising a gas ejection portion that intermittently ejects gas at a lower portion of the former.   The bag making and packaging apparatus according to any one of claims 1 to 5, further comprising a gas supply unit that supplies an inert gas to an upper portion of the former.

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