JP5266446B2 - Packaging method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the packaging process capable of performing non-hole packaging without having small holes and a ventilation section, preventing foreign matters such as insects from being entrained, and preventing a packaging bag from being damaged and preventing a cargo pile from being collapsed when they are flatly displayed. <P>SOLUTION: Packaged materials are filled in a packaging bag a that is hung and supported with the opening of the bag upwardly positioned with a grip pair g that are intermittently travelled in a plurality of processes, a packaging machine P configured such that heat seal is performed on the opening of the bag after the air in the packaging bag a is removed with a degassing nozzle 10 is employed, and in the forming process (6), a pressure-applying means 15 where a pair of pressure-applying means 21, 27 on which a vibrator 22 is mounted is approachable and separable by the action of the pneumatic cylinder 31 is provided, the packaging bag a in which the packaging materials are packed is vibrated with the vibrator 22 while pressure-applying the same bag with the pressure-applying means 21, 27 from both sides and the front and the rear to stretch the packaged materials in the elevating direction to form the same with a certain thickness and simultaneously remove the air in the same packaging bag with the degassing nozzle 10, thereby performing heat seal thereon. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a packaging method in which packaging bags such as rice, sugar, and salt are filled and sealed.

  In a packaging machine, a packaging bag that is supported in a suspended form with the bag mouth facing upward is filled with an article to be packaged such as rice, sugar, salt, etc., and the bag mouth is heat sealed. However, when the packaging bag is sealed with air remaining, the packaging bag may be damaged by the compressed residual air when the packaging bags are stacked, or the cargo may collapse during transportation. .

  For this reason, a packaging bag filled with an article to be packaged is shaped to a substantially constant thickness on a shaping conveyor attached to the packaging machine, and then a small hole is opened with a needle to remove residual air. A method is disclosed in Patent Document 1. Also, a packaging method is implemented in which residual air in the packaging bag is removed by heat sealing with a pattern in which a maze is formed so as to have air permeability, or by providing a heat seal according to the pattern and an air permeability filter in combination. Has been.

  However, if there are small holes or ventilation portions in the packaging bag, it cannot be prevented that foreign matters such as insects are mixed in from there. For this reason, in the method described in Document 1, the label is attached to the small hole after the residual air in the packaging bag is removed.

Since the packaging bag is supported in a suspended form simply by removing the air in the packaging bag when filling the packaged item in the packaging machine, It becomes difficult to shape to a substantially constant thickness. In addition, even if the packaging bag is supported in a suspended form and is simply subjected to a pressing action on the article to be swelled, the article to be packaged is stretched up and down to a certain thickness. It is difficult to shape.
Japanese Examined Patent Publication No. 56-12530

  An object of the present invention is to provide a packaging method that enables non-porous packaging without a small hole or ventilation portion, prevents contamination by foreign substances such as insects, and contributes to the prevention of damage and collapse of packaging bags during flat stacking. It is to provide.

In order to achieve the above object, according to the first aspect of the present invention, a moving body provided with one or a plurality of grip pairs is intermittently moved for each of a plurality of steps, and the bag mouth is suspended by each grip pair. Using a packaging machine configured to fill the packaging bag supported in a shape, remove the air in the packaging bag with a degassing nozzle, and then heat seal the bag mouth,
In the shaping process, there is provided a pressing means that allows a pair of pressing members, at least one of which is attached with a vibrator, to be moved toward and away from each other by actuation of an actuator, and a packaging bag filled with an article to be packed is pressed by the pressing members from both the front and rear sides. However, by applying vibration by the vibrator, the article to be packaged is stretched in the vertical direction and shaped to a certain thickness, and at the same time, the air in the packaging bag is removed by the deaeration nozzle to remove the heat seal. It is characterized by being applied.

  In order to achieve the same object, the invention described in claim 2 is the packaging method according to claim 1, wherein the bag mouth is temporarily attached in the shaping step, and the top seal step in the subsequent step is performed. This is characterized in that the main seal of the bag mouth is applied.

  In order to achieve the same object, the invention described in claim 3 is the packaging method according to claim 1 or 2, wherein the bottom portion of the packaging bag filled with the article to be packaged is pushed up by the pushing-up means. The heat sealing is performed.

(Invention of Claim 1)
According to this packaging method, an object to be packaged is stretched in the vertical direction and shaped to a certain thickness by pressing the packaging bag while applying vibration by a vibrator while removing air in the packaging bag. In addition, since it is not necessary to provide small holes or ventilation parts in the packaging bag, so-called non-porous packaging is possible, preventing contamination of foreign matters such as insects, and the packaging bag during stacking caused by residual air. Damage and collapse can be prevented. In addition, it is not necessary to install a shaping conveyor device separately from the packaging machine, which contributes to a reduction in equipment costs.

(Invention of Claim 2)
By making the seal of the bag mouth twice as the temporary seal and the main seal, a good seal can be given and the packaging efficiency can be improved.

(Invention of Claim 3)
For example, in the case of a packaging bag filled with a heavy package such as 10 kg and 15 kg, heat sealing is performed in a state where the bottom of the bag is supported by the lifting means. Thereby, it can suppress that the upper part of a packaging bag extends, and can give a favorable seal | sticker.

  Embodiments of the method of the present invention will be described below with reference to the drawings. 1 is a front view of a gas filling and packaging machine to which the method of the present invention is applied, FIG. 2 is a plan view of the same, FIG. 3 is a front view of a pressing means, and FIG. 4 is a plan view of the pressing means.

  The packaging method of the present invention is applied to the rotary type gas filling and packaging machine P shown in FIGS. 1 and 2, and a packaging bag having a capacity of about 1 kg to 15 kg is filled with an article to be packaged such as rice, sugar or salt. Perform the packaging to be sealed. The packaging machine P includes a bag feeding process (10), a bag chuck opening process (1), a bag opening process (2), a package filling process (3), gas replacement processes (3) to (6), It consists of 10 steps of a shaping / degassing / temporary sealing step (6), a top sealing step (7), a cooling step (8) of the seal portion, and a product removal step (9).

  In FIG. 1, a stand 2 is provided on a machine base 1 of the packaging machine P so as to freely support a longitudinal intermittent rotating shaft 3, and a disk-shaped rotating body 4 attached to the intermittent rotating shaft 3 includes Ten grip pairs g (the same number as the number of steps) for gripping or releasing the packaging bag a are provided so as to protrude radially at equal angular intervals. The bag feeding device 6 arranged in the bag feeding step (10) separates the packaging bags a stacked on the supply table 7 one by one from above by suction means having a suction cup (not shown). It is a known structure that is supplied to the grip pair g in a state of being suspended with the bag mouth facing upward.

  Reference numeral 9 denotes a filling funnel which is arranged corresponding to each grip pair g and is controlled to be moved up and down by a driving mechanism (not shown). Each filling funnel 9 is provided with a deaeration nozzle 10 and a gas replacement nozzle (not shown).

In this embodiment, the method of the present invention is applied to a rotary type packaging machine P. However, the present invention can also be applied to a linear movement type packaging machine.
Incidentally, the linear movement type packaging machine is provided with a plurality of grip pairs that can be converted into an upright posture and a horizontal posture on a movable body that horizontally moves in an annular passage composed of a straight portion and semicircular portions at both ends thereof, The packaging bag supplied in the above is supported by each pair of grips, and the packaging bag is intermittently stopped at each step such as the opening step, filling step, top sealing step, etc. to pack the packaged items. Say things.

  In the shaping / degassing / temporary sealing step (6), a pressing means 15 is provided for shaping the article to be packaged filled in the packaging bag a to a substantially constant thickness. 3 and 4, reference numeral 16 denotes a base of the pressing means 15 attached on the machine base 1 via a plurality of vibration isolating rubbers 17. A pair of left and right side plates 18 is erected on the base 16, and a flat plate-like pressing member 21 is fixed vertically with a vibration isolating rubber 20 on the front side of the support members 19, 19 that are interposed between the side plates 18. Has been. Reference numeral 22 denotes an electric vibrator fixed to the back surface of the pressing member 21.

  A pair of bearings 24 fixed to the base 16 support a rotating shaft 25 in the horizontal direction, and a swing member 26 is fixed to the rotating shaft 25 in a vertical direction. A flat plate-shaped pressing member 27 is fixed to the swinging member 26 in the vertical direction. The pressing member 21 and the pressing member 27 are provided in a pair of front and rear so that the inner surfaces face each other. A pair of bearings 29 fixed to the base 16 support a rotating shaft 30 in the horizontal direction, and a head portion of a pneumatic cylinder 31 serving as an actuator is attached to the rotating shaft 30. And the front-end | tip part of the rod 31a of the pneumatic cylinder 31 is attached to the back surface of the rocking | swiveling member 26 so that rotation is possible. Reference numeral 34 denotes a guide member attached to a bracket 33 fixed to the side plate 18 on the previous process side.

  Reference numeral 36 denotes a push-up means for pushing up the bottom portion of the packaging bag in an auxiliary manner when performing post-installation heat sealing. Reference numeral 38 denotes a movable shaft that can be moved up and down by a bearing member 37 fixed to the base 16. A horizontally long receiving member 40 is fixed to the tip of the arm 39 fixed to the movable shaft 38.

  Thereby, the pressing means 15 which makes the pressing member 27 approachable and separable by the action | operation of the pneumatic cylinder 31 with respect to the pressing member 21 to which the vibrator 22 was attached is comprised.

  45 is a known temporary sealing means disposed above the pressing means 15. Reference numeral 46 denotes a pair of seal bars provided so as to be close to and separated from each other by a drive mechanism (not shown).

Since the packaging method of the present invention is characterized by the packaging operation in the shaping / degassing / temporary sealing step (6) of the gas filling packaging machine P, the operation of the pressing means 15 installed in this step will be mainly described. .
(A) In the filling step (3) of the package object, a predetermined amount of the package object such as rice is filled in the packaging bag a supported by the grip pair g. Further, as the filling funnel 9 is lowered, the gas replacement nozzle and the tip of the deaeration nozzle 10 are inserted into the packaging bag a. Then, a gas replacement operation by the gas replacement nozzle and a residual air removal operation by the deaeration nozzle 10 are started.
(B) In the shaping / degassing / temporary sealing step (6), when the packaging bag a is stopped between the pressing member 21 and the pressing member 27 where the pressing means 15 is opened, the receiving member 40 of the lifting means 36 is raised. Then, the bottom of the packaging bag a is pushed up a little. Next, the swinging member 26 stands by the operation of the pneumatic cylinder 31, and the packaging bag a is pressed from both the front and rear sides by the pressing member 21 and the pressing member 27 while being vibrated by the vibrator 22. As a result, the article to be packaged is stretched in the vertical direction and shaped to a certain thickness.
(C) When the above shaping is completed, the gas replacement nozzle and the deaeration nozzle 10 are raised to escape from the bag mouth of the packaging bag a, the gas replacement operation and the residual air removal operation are stopped, and the temporary sealing means 45 Thus, the bag mouth is temporarily sealed.
(D) The top seal is applied in the top seal step (7), and the portion where the top seal is applied in the cooling step (8) of the seal portion is cooled. Subsequently, the packaging bag a is discharged onto the conveyor 50 in the product removal step (9).

Front view of a gas filling packaging machine to which the method of the present invention is applied Same as above, top view Front view of pressing means Plan view of pressing means

Explanation of symbols

P ... Gas filling and packaging machine 4 ... Rotating body (moving body)
g ... Grip pair 10 ... Deaeration nozzle a ... Packaging bag 15 ... Pressing means 21, 27 ... Pressing member 22 ... Vibrator 31 ... Pneumatic cylinder (actuator)
36 ... Pushing means

Claims (3)

A movable body provided with one or a plurality of grip pairs is intermittently moved for each of a plurality of steps, and each grip pair fills a packaging bag supported in a suspended manner with the bag mouth facing upward, Use a packaging machine configured to remove the air inside with a degassing nozzle and then heat seal the bag mouth,
In the shaping process, there is provided a pressing means that allows a pair of pressing members, at least one of which is attached with a vibrator, to be moved toward and away from each other by actuation of an actuator, and a packaging bag filled with an article to be packed is pressed by the pressing members from both the front and rear sides. However, by applying vibration by the vibrator, the article to be packaged is stretched in the vertical direction and shaped to a certain thickness, and at the same time, the air in the packaging bag is removed by the deaeration nozzle to remove the heat seal. A packaging method characterized by being applied.   The packaging method according to claim 1, wherein a temporary seal of the bag mouth is applied in the shaping step, and a main seal of the bag mouth is applied in a top seal step of a subsequent step.   The packaging method according to claim 1 or 2, wherein the heat sealing is performed in a state in which a bottom portion of the packaging bag filled with the article to be packaged is pushed up by a pushing-up means.

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