JP2598230Y2 - Degassing packaging equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, a band-shaped film is rolled into a cylindrical shape sequentially from the end around a packaged object, and the air in the cylindrical film is removed by suction of a nozzle and sealed. The present invention relates to a deaeration packaging device for bagging.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 57-63002 discloses FIG.
As shown in FIG. 1, a large number of products 2 are conveyed along an elongated pipe nozzle 1, while a band-shaped film 3 is conveyed to each of the products 2.
While transporting the film 3 at the same speed as the above, the film 3 is rolled into a cylinder around the product, the seams on both sides of the cylindrical film are welded in an airtight manner, and the air in the film is sucked and deaerated by the nozzle 1. A packaging device adapted to do so is disclosed.

[0003]

However, in the above-described packaging apparatus, the film inside the film is shrunk by suction of the air in the film, so that the film shrinks between the preceding and following objects to be packaged. The interval 5 between the degassed portions is reduced. As a result, the film is wrinkled, and the wrinkled portion is thermally welded, so that the airtightness is poor and the commercial value is reduced. Therefore, the present invention provides a packaging device that does not shrink the film.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a mechanism for feeding a large number of packages to a film cylinder at equal intervals, and feeding a band-like film into the cylinder. A mechanism for forming the film into a tube so as to be wound around the object to be packaged in the cylindrical device, a cross-sealing mechanism for thermally welding the cylindrical film between the wrapped objects to be packaged, and a cylindrical film. In a packaging machine comprising an intake nozzle having a front end opened near the cross seal mechanism through the inside, an electromagnetic opening / closing valve 34 is provided at a suction source of the intake nozzle, and a power supply circuit of the electromagnetic opening / closing valve is provided with a switch 36 through a switch. On the other hand, a conveyor 19 for loading goods, which rotates at the same speed as the film, is provided immediately below and behind the cross-seal mechanism in the direction of transport of the film. While the product holding belt 20 formed by the material is installed, the intermittent motor 29 which rotates at a slightly higher speed than the film and the holding belt 20 are connected by a one-way clutch 41 having a structure in which the holding belt 20 idles by input from the holding belt side. In addition, the power supply circuit of the intermittent motor 29 further includes a second switch 4 that opens and closes in synchronization with the switch 36.
3 is provided.

[0005]

A large number of items to be packaged are supplied to a film cylinder at equal intervals, and the items to be packaged are arranged in a film formed by the cylinder. On the other hand, the cross-seal mechanism heat-welds the tubular film between the respective packages.
However, since the intake nozzle is opened near the cross seal mechanism to suck the air in the film,
Air inside the tubular film is evacuated to the outside before sealing. In such a packaging machine, an electromagnetic opening / closing valve 34 is provided in the intake nozzle, and a switch 36 is provided in a power supply circuit of the electromagnetic opening / closing valve.
Is operated so that the degassing operation is performed only for a time immediately before the cross-seal mechanism welds the film. On the other hand, a conveyor 19 for loading goods which rotates at the same speed as the film is provided immediately below and below the cross seal mechanism in the film transport direction, and a pressing belt 20 made of a high friction material is provided above the conveyor. And the pressing belt, the packaged object is nipped and transported. The presser belt 20 is intermittently driven by an intermittent motor 2 via a one-way clutch 41 having a structure in which the presser belt 20 idles by an input from the presser belt side.
9, the conveyor belt 19 rotates the presser belt 20 so that the presser belt 20 idles and conveys the articles to be packaged. As a result, the holding belt 20 with high friction moves the article to be packaged at a high speed, and applies tension to the film. In this case, since the second switch 43 provided in the power supply circuit of the intermittent motor 29 is configured to open and close in synchronism with the switch 36 for operating the electromagnetic on-off valve, when the nozzle degass the air in the film, the presser is pressed. The belt 20 also rotates at a high speed to apply tension to the film, and the cross seal mechanism applies heat to the film in such a state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a mechanism 10 feeds a large number of articles to be packaged 11 at equal intervals toward a cylinder-making machine 12 by a conveyor. A pair of upper and lower belts 13 and 1 provided at the rear of the cylinder making device
4 pulls the belt-like film 15 through the cylinder-making device 12 by the rotational force to turn the belt-like film into a tube 16. As a result, a large number of packages 11 can be arranged and transported at equal intervals in the cylindrical film 16. A pair of cross-seal mechanisms 17 and 18 are provided behind the belts 13 and 14, and a belt conveyor 19 that rotates at the same speed as the film is provided below the back of the cross-seal mechanisms. Pulleys 21 and 22
Are supported and arranged respectively. As shown in FIG. 2, the pair of cross-seal mechanisms 17, 18 perform a contact / separation action along long holes 24, 25 formed in the gate-shaped frame 23, and the bracket 2 fixed to the frame 23.
The movable frame 28 is engaged with the handle screw bar 27 engaged with the movable frame 6, and the presser belt 20 is rotatably supported on the movable frame, and the pulley shaft of the presser belt 20 is interposed via the intermittent motor 29 and the chain 30. Connected.

On the other hand, an intake nozzle 32 connected to a vacuum pump 31 at one end is arranged in the cylinder 12, and a tip 33 of the intake nozzle is opened near the cross seal mechanisms 17, 18. A switch 36 is provided in the power supply circuit 35 of the electromagnetic switch valve 34 provided on the way. Further, as shown in FIG. 3, a one-way clutch 41 in which a claw 38 provided on a core shaft 37 is engaged with a gear 40 inside an outer ring 39 is provided in the middle of a power transmission system connecting the intermittent motor 29 and the presser belt 20. And the intermittent motor 29
A second switch 43 is provided in the electric circuit 42 of the third embodiment so that the switch 36 of the electromagnetic switch valve and the second switch 43 operate in synchronism.

When the switch 36 is closed immediately before the film is pressed by the pair of cross-seal mechanisms 17 and 18 in FIG. 1, the suction force of the vacuum pump 31 acts on the film via the nozzle 32, and the inside of the tube film is removed. Of air is eliminated. The switch 36 and the second switch 43 act in synchronism to drive the intermittent motor 29. Since the rotation speed of the intermittent motor 29 is set slightly higher than the film moving speed, the rotation of the intermittent motor 29 is controlled. The power is transmitted to the presser belt 20 via the one-way clutch 41, and the presser belt 20 formed of a high friction material pulls the film to apply tension. As a result, the cross-seal mechanisms 17 and 18 press and weld the stretched film.
The operation time of both switches 36 and 42 is very short, and the vacuum suction force and the rotation of the intermittent motor 29 are normally stopped. In this case, the one-way clutch 41 idles by the input from the presser belt 20. Therefore, the conveyor 19 transfers the packaged object without applying tension to the film.

[0009]

[Effect] According to the present invention, the tension can be applied to the film by rotating the presser belt at the same time as the vacuum suction by the suction nozzle, and the film can be cross-sealed in such a state. However, there is an effect that the film can be heat-sealed without forming wrinkles.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a partial explanatory view of the previous figure.

FIG. 3 is an operation explanatory view of the preceding figure.

FIG. 4 is an explanatory view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... supply mechanism, 12 ... cylinder machine, 17, 18 ... cross seal mechanism, 20 blue belt, 29 ... intermittent motor, 32 ... intake nozzle, 36 switch, 43 ... second switch.

Claims (1)

(57) [Scope of request for utility model registration] A mechanism for feeding a large number of packages to a film cylinder at equal intervals, and a belt-like film fed to the cylinder and wound around the package in the cylinder. A mechanism for making the film cylindrical, a cross-seal mechanism for thermally welding the cylindrical film between the wrapped objects to be packaged, and an intake nozzle whose tip is opened near the cross-seal mechanism through the inside of the cylindrical film. In the packaging machine, an electromagnetic opening / closing valve 34 is provided at a suction source of the suction nozzle, and a switch 36 is provided in a power supply circuit of the electromagnetic opening / closing valve, while the cross-seal mechanism is arranged in a direction in which the film is transported. A conveyor 19 for mounting a product which rotates at the same speed as the film is provided immediately below the rear of the vehicle, and a product holding belt 20 formed of a high friction material is installed above the conveyor. The intermittent motor 29, which rotates at a slightly higher speed than the film, and the presser belt 20 are connected via a one-way clutch 41 having a structure in which the intermittent motor 29 idles by the input from the presser belt side. Second switch 4 that opens and closes in synchronization with switch 36
3 is a deaeration packaging device.