JP6103665B1 - Gas replacement packaging machine - Google Patents

Abstract

An object of the present invention is to provide a gas replacement packaging machine in which an inert gas is filled by repeating an operation of filling an inert gas while sucking air in the packaging bag to leave the inert gas in the packaging bag. A gas filling nozzle 6 advances in the direction of the bag mouth of the packaging bag 28 by the advancement of the swing plate 14, and the suction nozzle 9 and the left and right gas injection nozzles 10 and 11 are inserted into the bag mouth of the packaging bag 28. . The left and right gas injection nozzles 10 and 11 are expanded left and right, and the bag mouth of the packaging bag 28 is expanded. Further, the bag mouth pressing member 7 seals the packaging bag 28 by pressing the gas filling nozzle 6 and the bag mouth from above and below. In this sealed state, the inert gas is ejected from the gas injection nozzles 10 and 11 into the packaging bag 28 and the leaf spring member 22 of the suction nozzle 9 widens the edge of the packaging bag 28 up and down. Then, air is sucked from the packaging bag 28 to perform gas replacement. [Selection] Figure 2

Description

  The present invention relates to a gas replacement packaging machine that can be filled with an inert gas while discharging air in a packaging bag.

2. Description of the Related Art Conventionally, there is known a nozzle type gas filling and packaging machine in which a suction nozzle that sucks gas in a bag is provided around a jet nozzle that jets a gas such as nitrogen gas (see Patent Document 1).
In this known technique, when the switching valve connected to the suction pump is switched and the suction nozzle is connected to the air pressure source, the compressed air is supplied to the suction nozzle through the vacuum ejector, and the vacuum ejector removes the cleaning liquid from the tank. Since suction is performed, the cleaning liquid is ejected from the suction nozzle together with the compressed air, and the dust accumulated in the suction nozzle is cleaned.

  The nozzle-type gas-filling packaging machine has a suction nozzle for sucking air, and even if debris of a packaged item or dust attached to the package accumulates, the cleaning liquid is jetted from the suction nozzle together with the compressed air, Although it is effective in that the suction nozzle can be cleaned, it is effective to replace the gas in the bag because a suction nozzle that sucks the gas in the bag is provided around the jet nozzle that ejects a gas such as nitrogen gas. There was a fear of not being done.

Further, there is known a bag body vacuum sealing device that can accurately position a bag body corresponding to bags of various sizes (see Patent Document 2).
This known technique is designed to prevent dust, moisture, and various germs sucked together with the intake air from being mixed into the replacement gas, but in the vicinity of the replacement gas loading device for loading the replacement gas, Therefore, there is a possibility that gas replacement in the bag body is not effectively performed.
Therefore, the present applicant separates the suction nozzle for sucking air from the jet nozzle for jetting nitrogen gas or the like, and does not adversely affect the replacement of air suction and nitrogen gas filling. We have developed a gas replacement packaging machine that ensures air suction by devising measures to prevent the bag mouth from sticking.

Japanese Utility Model Publication No. 6-20203 JP 2000-247308 A

  It is an object of the present invention to provide a gas replacement packaging machine that performs gas replacement by repeatedly filling an inert gas while sucking air in the packaging bag to leave the inert gas in the packaging bag.

The gas replacement packaging machine of the present invention is a gas filling nozzle comprising a unit of a central suction nozzle and gas injection nozzles arranged on both sides of the suction nozzle.
The gas injection nozzles on the right side of each unit are placed on one plate. Similarly, the gas injection nozzles on the left side of each unit are placed on one plate, and each of the plates moves back and forth. The guide rail of the moving plate is attached and fixed to a guide base that slides left and right, the suction nozzle is also fixed to the swing plate, the central suction nozzle is fixed, and the left and right gas injection nozzles are the suction It has a structure that is expanded to the left and right around the nozzle.
The suction nozzle supports a flat cylindrical nozzle body, two leaf spring members pivoted by pins on the upper and lower sides of the nozzle body, bent upward and downward from the tip, and the nozzle body And a connecting pipe connected to a suction pump at the end of the nozzle body.
The gas injection nozzle includes a nozzle body having a flat cylindrical tip, a support that supports the nozzle body, and a connecting pipe connected to a gas cylinder of an inert gas at the end of the nozzle body.

The gas replacement packaging machine of the present invention separates the suction nozzle for sucking air and the gas injection nozzle for jetting inert gas, and repeats the operation of filling the inert gas while sucking the air in the packaging bag. Since the gas is replaced and the inert gas remains in the packaging bag, the gas replacement between the air suction and the filling of the inert gas is not adversely affected.
Further, since the leaf spring member for preventing the bag mouth from sticking to the suction nozzle is provided, air can be reliably sucked.

It is a front view of the gas substitution packaging machine of the present invention. It is principal part explanatory drawing of the gas replacement packaging machine of this invention. It is (a) top view, (b) right side view, (c) front view of a suction nozzle. It is (a) top view, (b) right side view, and (c) front view of a gas injection nozzle. It is a schematic perspective view which shows operation | movement of the gas replacement packaging machine of this invention.

An embodiment of the gas replacement packaging machine of the present invention will be described below with reference to the accompanying drawings.
As shown in the front view of FIG. 1, the gas replacement packaging machine of the present invention has a rectangular parallelepiped machine frame 1, casters 2 arranged at the lower corners of the machine frame 1, and a support frame in front of the machine frame 1. 3, a belt conveyor mechanism 4 installed via 3, a motor 5 for driving the belt conveyor mechanism 4, a gas filling nozzle 6 disposed at a gas replacement packaging position of the belt conveyor mechanism 4, and the gas filling nozzle 6 And a seal member disposed on the back side of the bag mouth pressing member 7 (shown because it is located on the back side of the bag mouth pressing member 7). And a control device 8 arranged on the upper part of the machine casing 1.

2, the gas filling nozzle 6 disposed at the gas replacement packaging position includes a central suction nozzle 9 and gas injection nozzles 10 and 11 disposed on both sides of the suction nozzle 9. Of units.
The right gas injection nozzles 10 of each unit are placed on one right plate 12, and the left gas injection nozzles 11 of each unit are also placed on one left plate 13.
Each of the plates 12 and 13 is fixedly attached to a guide base 16 that slides left and right on a guide rail 15 of a swing plate 14 that moves back and forth, and the suction nozzle 9 is also fixed to the swing plate 14.
The guide table 16 is fixed to the pusher head 18 via a turnbuckle 17, and the reciprocating motion of the cylinder 19 is transmitted to the guide table 16 that slides left and right via the turnbuckle 17 whose length can be adjusted.
The gas injection nozzles 10 and 11 of the gas filling nozzle 6 are simultaneously slid left and right, and the suction nozzle 9 at the center is in a fixed state and is widened to the left and right around the suction nozzle 9.
In this embodiment, there are two sets of gas filling nozzles 6, but the present invention is not limited to this.

  As shown in FIG. 3A, FIG. 3B, a right side view, and FIG. 3C, a front view, the suction nozzle 10 has a flat cylindrical nozzle body 20 and pins up and down inside the nozzle body 20. Two leaf spring members 22 pivoted at 21 and bent upward and downward from the tip, a support member 23 for supporting the nozzle body, and a connecting pipe 24 connected to the end of the nozzle body 20 It consists of. The connecting pipe 24 is connected to a suction pump (not shown).

  The gas injection nozzles 10 and 11 are, as shown in FIG. 4 (a) plan view, (b) right side view, and (c) front view, a nozzle body 25 having a flat cylindrical tip, and the nozzle body 25. And a connecting pipe 27 connected to the end of the nozzle body 25. The connecting pipe 27 is connected to a gas cylinder of an inert gas such as nitrogen gas (not shown).

The operation of the gas replacement packaging machine of the present invention will be described below with reference to the accompanying drawings.
A packaging bag 28 containing an article to be packaged is placed on the belt of the belt conveyor mechanism 4 shown in FIG. 1, and the motor 5 of the belt conveyor mechanism 4 is driven to move the packaging bag 28 toward the gas filling nozzle 6.
At the position of the gas filling nozzle 6, the gas filling nozzle 6 shown in FIG. 2 advances in the direction of the bag opening of the packaging bag 28 by the advancement of the swing plate 14, and the suction nozzle 9 and the left and right gas injection nozzles 10, 11 are the packaging bag. It is inserted into 28 bag mouths.

Then, as shown in the schematic perspective view of FIG. 5, the left and right gas injection nozzles 10, 11 are expanded left and right, and the bag mouth of the packaging bag 28 is expanded.
Further, the bag mouth pressing member 7 (not shown) presses the gas filling nozzle 6 and the bag mouth from above and below to seal the packaging bag 28.
In this sealed state, an inert gas is ejected from the gas injection nozzles 10 and 11 into the packaging bag 28 and air is sucked from the packaging bag 28 by the suction nozzle 9 to perform gas replacement.
Gas injection from the gas injection nozzles 10 and 11 is stopped, only the suction operation from the suction nozzle 9 is performed, and the inside of the packaging bag 28 is evacuated.
At that time, since the upward and downward bent portions of the leaf spring member 22 of the suction nozzle 9 widen the lip of the packaging bag 28, the air is quickly released, and finally the suction which is not shown in the drawing. The portions bent upward and downward by the suction action of the pump are closed, and the inside of the packaging bag 28 is evacuated.

  The inert gas is again ejected from the gas injection nozzles 10 and 11 into the packaging bag 28, and the portions bent upward and downward of the leaf spring member 22 are opened, and the suction nozzle 9 sucks the inert gas from the packaging bag 28. Thereafter, the gas injection from the gas injection nozzles 10 and 11 is stopped, only the suction operation from the suction nozzle 9 is performed, the gas is replaced, and the leaf spring member 22 is moved upward and downward by the suction action of the suction pump (not shown). The bent portion is closed and the inside of the packaging bag 28 is evacuated.

Then, the suction nozzle 9 is stopped, a small amount of inert gas is injected from the gas injection nozzles 10 and 11, the gas filling nozzle 6 is pulled out from the packaging bag 28, and the bag opening of the packaging bag 28 is closed. The bag mouth is sealed by the vertical movement of the seal member.
When the sealing is completed, the bag mouth pressing member 7 is raised, and the belt conveyor mechanism 4 is again driven to convey the packaging bag 28 that has been subjected to gas replacement packaging to the downstream side.

In this manner, the suction nozzle 9 for sucking air and the gas injection nozzles 10 and 11 for jetting inert gas are separated, and the inert gas is filled while sucking the air in the packaging bag 28. Since the gas replacement is repeated and the inert gas remains in the packaging bag 28, the gas replacement between the air suction and the inert gas filling is not adversely affected.
Further, since the leaf spring member 22 for preventing the bag mouth from sticking to the suction nozzle 9 is provided, air can be reliably sucked.

DESCRIPTION OF SYMBOLS 1 Machine frame 2 Caster 3 Support frame 4 Belt conveyor mechanism 5 Motor 6 Gas filling nozzle 7 Bag mouth pressing member 8 Control device 9 Suction nozzle 10 Right gas injection nozzle 11 Left gas injection nozzle 12 Right plate 13 Left plate 14 Swing plate 15 Guide rail 16 Guide base 17 Turn buckle 18 Pusher head 19 Cylinder 20 Nozzle body 21 Pin 22 Leaf spring member 23 Support member 24 Connection pipe 25 Nozzle body 26 Support body 27 Connection pipe 28 Packaging bag

Claims (3)

In a gas filling nozzle comprising a unit of a central suction nozzle and gas injection nozzles arranged on both sides of the suction nozzle,
The gas injection nozzles on the right side of each unit are placed on one plate. Similarly, the gas injection nozzles on the left side of each unit are placed on one plate, and each of the plates moves back and forth. The guide rail of the moving plate is attached and fixed to a guide base that slides left and right, the suction nozzle is also fixed to the swing plate, the central suction nozzle is fixed, and the left and right gas injection nozzles are the suction A gas replacement packaging machine characterized by having a structure that is expanded to the left and right around a nozzle.   The suction nozzle supports a flat cylindrical nozzle body, two leaf spring members pivoted by pins on the upper and lower sides of the nozzle body, bent upward and downward from the tip, and the nozzle body The gas replacement packaging machine according to claim 1, comprising: a supporting member configured to connect; and a connecting pipe connected to a suction pump at an end of the nozzle body.   The gas injection nozzle comprises a nozzle body having a flat cylindrical tip, a support body that supports the nozzle body, and a connection pipe connected to a gas cylinder of an inert gas at an end of the nozzle body. The gas replacement packaging machine according to claim 1.

Images