JP2619794B2 - Nozzle descent detecting device in inert gas filling device of packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for filling an inert gas by inserting a conductive gas filling nozzle downward into a packaging bag gripped by a plurality of pairs of gripping arms in the radial direction of a packaging machine. A device that can detect the presence or absence of insertion based on the presence or absence of a contact signal between the first and / or second contact lines and the gas filling nozzle. In such a case, for example, it is possible to perform a measure to stop the heat sealing of the corresponding packaging bag.

[0002]

2. Description of the Related Art An apparatus for filling an inert gas by downwardly inserting a gas filling nozzle into a packaging bag gripped by a plurality of pairs of gripping arms in a radial direction of a packaging machine is disclosed in Japanese Patent Publication No. 58-52890. Known as disclosed. However, when the gas filling nozzle is exposed to the outside of the packaging bag and descends, there is no device for confirming the state.

[0003]

SUMMARY OF THE INVENTION The present invention detects that a gas filling nozzle is exposed to the outside of a packaging bag and descends during an intermittent rotation of the packaging machine at a position where there is no support for the rotation of the packaging machine. It is intended to be able to do so.

[0004]

SUMMARY OF THE INVENTION A nozzle descent detecting device in an inert gas filling device of a packaging machine according to the present invention meets the above-mentioned object and is grasped by several pairs of grasping arms in the radial direction of the packaging machine. An apparatus for filling an inert gas by downwardly inserting an electrically conductive gas filling nozzle into a packaging bag, wherein a first support rod corresponding to one side of a packaging bag bag opening is provided on a column erected near a gas filling station. A second support rod corresponding to the other side is provided, and a first contact line made of a spring wire having no chance of contacting one of the first support rod and the second support rod due to a vertical position difference, and a second support rod. Each coil part of the contact wire is fitted, and normally, the opening direction of the packaging bag when viewed from above intersects as a release port so as to keep substantially no contact. The filling nozzle comes off and descends to the first
When passing between the intersections of the contact line and the second contact line, one or both of the first contact line and the second contact line transmit a contact signal with the conductive gas filling nozzle. It is.

[0005]

According to the present invention, the first support rod 7 corresponding to one side of the packaging bag bag opening b of the packaging machine and the first support rod 7 corresponding to the other side thereof are provided on the column 4 erected near the gas filling station of the machine base 1. The second support rod 8 is set up, and the first support rod 7 and the second support rod 8 are each coiled by a first contact line 11 and a second contact line 12 made of a spring wire having no chance of contacting each other due to a vertical position difference. 13 is inserted, and usually the direction of entry of the packaging bag a crosses as the release port 14 when viewed from above, and is kept substantially in a non-contact state. The gas filling nozzle G comes off and descends, and the first contact line 11 and the second
When passing between the intersections of the contact lines 12, both or one of the first contact line 11 and the second contact line 12 detects a change in the capacitance of the conductive gas filling nozzle G by the touch sensor 5 and makes contact. A signal is transmitted, and a measure such as stopping an operation necessary for heat sealing can be taken by this signal.

[0006]

1 is a schematic plan view, and FIG. 2 is a plan view of gripping arms 2a, 3a. FIG. 3 is a back front view of the support 4, the insulating arm 6, the first support rod 7, the second support rod 8, the first contact line 11, the second contact line 12, etc., FIG. 4 is the same plan view, and FIG. FIG. 6 is a plan view showing a state where only the gas filling nozzle G is detected without the bag a. FIG.
7 is an explanatory view of a state in which the nozzle is detached from the packaging bag by the first contact line 11, and FIG. 8 is a diagram illustrating that the nozzle is detached from the packaging bag. FIG. 4 is an explanatory diagram of a state where detection is performed using two contact lines 12.

FIG. 1 is a schematic view of the present embodiment, in which 1 denotes a machine base, the right side of the figure is a first packaging machine 2 having a conventionally known configuration, and the left side is a conventional packaging machine having an inert gas. The second packing machine 3 is provided with a gas filling nozzle G required for filling and a device required for gas supply. The first wrapping machine 2 and the second wrapping machine 3 are provided with known gripping arms 2a and 3a (FIG. 2) corresponding to the number and spacing of the respective stations described below. These gripping arms 2a and 3a have a slightly upper and lower positional difference in the gripping position of the packaging bag a in a delivery station vii and a receiving station I, which will be described later, so that they can pass horizontally without abutment with each other. The first configuration is
Delivery of the packaging bag a from the packaging machine 2 to the second packaging machine 3 becomes possible. This configuration is described in Japanese Patent Publication No. 58-52890 and is obvious in the present invention.

The first packaging machine 2 comprises eight stations, such as a packaging bag supply station i, an envelope filling station iii, an envelope pressing station iv to v, a delivery station vii, and the like. The second packaging machine 3 comprises twelve stations, and includes a receiving station I, gas filling stations II to VIII, a bag mouth sealing station IX, a cooling station X, a discharging station XI, and the like.

[0009] The nozzle insertion detecting device of the present embodiment is disposed in the gas filling station II of the second packaging machine 3. This position is a position immediately before the packing bag a is received by the gripping arm 3a with the receiving station I and the gas filling nozzle G is inserted into the bag mouth b to start the inert gas filling, and just before the gas filling.

As shown in FIG. 3, a column 4 lower than the packaging bag a which is intermittently transported by being gripped by the gripping arm 3a is set up on the machine base 1 as shown in FIG. A touch switch 5 is provided. Further, an insulating arm 6 extending at both ends is fixed on the inner and outer surfaces of the passage of the packaging bag a on the support 4, and a first support rod 7 and a second support rod 8 made of metal screw rods are provided at both ends. And set the touch switch 5
Is connected to both support rods 7 and 8.

The first and second support rods 7 and 8 have arms 9 and 1 respectively.
0 is screwed in and fixed, and a first wire made of a spring wire having a coil portion 13 formed between one end and the other end as illustrated in FIG.
The contact wire 11 and the coil portions 13 of the second contact wire 12 are fitted, one end is fixed to the arms 9 and 10, and the other end is a two-dot chain line in FIG. So that they intersect. However, as shown in FIG. 3, the first contact line 11 and the second contact line 12 are configured such that there is no opportunity to contact each other by generating a positional difference between the lower end and the upper end of the other end. Only when viewed from the top, substantially no contact is maintained. Note that the upper ends of the first and second contact lines 11 and 12 are slightly lower than the gripping arms 2a and 3a.

[0012]

According to the present invention, the first contact line and the second contact line are always viewed from only the upper surface due to the vertical position difference, as described in the configuration and operation described in the embodiment. When it intersects, it has a peculiar structure that does not substantially contact, it is exposed between the intersection of the two lines in the packaging bag a and the bag opening b of the packaging bag a or outside. Even if the descending gas filling nozzle G enters, the gas filling nozzle G is passed without any trouble, and there is a special effect that the descending gas filling nozzle G can be detected during the intermittent rotation or stop of the packaging machine.

[Brief description of the drawings]

 The attached drawings show this embodiment,

FIG. 1 is a schematic plan view,

FIG. 2 is a plan view of gripping arms 2a, 3a.

FIG. 3 is a rear elevational view of a support column 4, an insulating arm 6, a first support rod, a second support rod, a first contact line, a second contact line, and the like;

FIG. 4 is a plan view of the same;

FIG. 5 is a plan view showing a state in which the packaging bag a is missing and only the gas filling nozzle G is detected.

FIG. 6 is a perspective view of the first and second contact lines 11 or 12,

FIG. 7 is an explanatory diagram of a state in which the first contact line 11 detects that the gas filling nozzle G is detached from the packaging bag,

FIG. 8 is an explanatory diagram of a state in which the gas contact nozzle G is removed from the packaging bag by the second contact line 12,

[Explanation of symbols]

G → Gas filling nozzle 1 → Machine base 2 → First wrapping machine 2a → Gripping arm 3 → Second wrapping machine 3a → Gripping arm i → Packaging bag supply station iii → Packaging filling station iv ~ v → Package pressing Station vii → Delivery station I → Receiving station II to VIII → Gas filling station IX → Sealing station X → Cooling station XI → Discharge station 4 → Post 5 → Capacitive touch switch 6 → Insulating arm 7 → First support rod 8 → second support rod 9, 10 → arm 11
→ 1st contact line 12 → 2nd contact line 13 → coil part 14 → release port

Claims (1)

(57) [Claims] An apparatus for filling an inert gas by inserting a conductive gas filling nozzle downward into a packaging bag gripped by several pairs of gripping arms in a radial direction of a packaging machine. A first supporting rod corresponding to one side of the packaging bag opening and a second supporting rod corresponding to the other side are provided on the upright supporting column.
The coil portions of the first contact line and the second contact line made of a spring wire having no chance of contacting each other due to a vertical position difference are fitted to either the support rod or the second support rod, and are usually packaged when viewed from above. The direction of entry of the bag is used as a release port so as to intersect and keep substantially no contact, the packaging bag is missing or the conductive gas filling nozzle comes off from the packaging bag and descends to lower the first contact line with the first contact line. Inertness of a packaging machine characterized in that when passing between the intersections of two contact lines, one or both of the first contact line and the second contact line transmit a contact signal with the conductive gas filling nozzle. Nozzle descent detecting device in gas filling device.