JP2000006924A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stable and clean packaging of assembled products such as plate-like materials that are packaged with difficulty. SOLUTION: There are provided a pair of long films 17, 18 wound in a roll form. There are provided chain or belt mechanism 22, 23 in which longitudinal edges of the pair of films 17, 18 are overlapped to each other and held and then a pair of films 17, 18 are fed out in a longitudinal direction of each of the films 17, 18. There are provided two pairs of chain or belt mechanisms 22, 23, correspondingly positioned at each of both longitudinal edges of a pair of films 17, 18, the products are packaged with four sides of a pair of films 17, 18 being sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device for wrapping a product with a film and sealing the periphery thereof.

[0002]

2. Description of the Related Art Conventionally, as a packaging device for wrapping a product with a film and sealing the four sides thereof, for example, placing the product on a belt conveyor, transporting the product by a pusher, and pressing the product against the film. And a packaging device for sealing and packaging the four sides of the film with a sealing device. Further, for example, Japanese Patent Application Laid-Open No. 4-253605
As disclosed in Japanese Unexamined Patent Application Publication No. 2000-163, a packaging device provided with a device having a swinging mechanism for pulling out an end of a film without pulling the film out of a product has been proposed.

[0003]

In the former case of the prior art, for example, if the product is not self-sustaining by a set of trays or various kinds of fitting lids or is light, the product is pushed. When the film was pulled out, the arrangement of the products was lost, and the package could not be packed neatly.
Furthermore, if the product is light and tall, unless the pusher is located near the center of gravity of the product, the tension of the film will push the top of the product, causing the product to roll backwards or collapse. there were.

In the latter case of the above-mentioned prior art, since the mechanism for pulling out the film between the films swings, the apparatus is complicated, cannot be operated at high speed, and is inefficient.

[0005] The present invention has been made in view of the above-mentioned problems of the related art, and has as its object to provide a packaging device capable of stably and neatly packaging a product that is difficult to package.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a pair of long films wound in a roll are fed, a product is positioned therebetween, and the product is packaged by sealing the four sides of the pair of films. And a chain or belt mechanism for sandwiching the side edges of the pair of films in the longitudinal direction together and feeding the pair of films in the longitudinal direction of the film. The chain or belt mechanism is provided in two pairs, and is positioned corresponding to each of the longitudinal side edges of the pair of films, and closes the pair of films to each of the chains or belts in close proximity to the two pairs of chain or belt mechanisms. When the product is disposed between the pair of films and sealed, the film is pulled out by the chain or belt mechanism, and the product is pulled out at a predetermined position of the sealing device when the film is drawn out. This is a packaging device that is sent to

A horizontal sealing device for welding the pair of films along the feed direction of each chain or belt mechanism, and a base end side of the chain or belt mechanism in the feed direction orthogonal to the longitudinal direction of the pair of films. And a vertical sealing device for sealing the pair of films by fusing and welding.

The film guide urges the distal end of the pair of films sealed by the vertical sealing device. Further, the film guide is a pair of rods that press the leading ends of the pair of films or a nozzle that urges the leading ends of the pair of films by blowing air.

A film sensor for detecting whether or not the pair of films is held between the pair of chains or belt mechanisms is provided near the pair of chains or belt mechanisms. The chain or belt mechanism includes a chain or belt control device that drives the pair of films to be pulled out by the two pairs of chain or belt mechanisms after the pair of films are sandwiched.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 7 show an embodiment of the present invention. As shown in FIGS. 1 to 3, a packaging device 10 according to this embodiment includes a transport unit 14 for transporting a product 12 to be packaged, And a packaging unit 20 for packaging the same. The transport unit 14 is provided with a rotatable roller 16 and a pusher 15 for feeding the product 12 on the roller 16 to the packaging unit 20. Pusher 15
Has an extruded plate 13 of the product 12, is provided on the upper part of the L-shaped frame 11 provided in the transport unit 14, and is arranged so as to be able to reciprocate toward the packaging unit 20 by a driving device (not shown). .

Roll films 17 and 18 are provided on the lower and upper portions of the transport section 14, respectively. The pair of roll films 17 and 18 are respectively fed out to the packaging section via the guide roller mechanism 19.

The packaging section 20 is provided with two pairs of chain mechanisms 22 and 23 for pulling out a pair of films. The pair of chain mechanisms 22 and 23 are driven by the chains of the chain mechanisms 22 and 23 facing each other and contacting each other. The pair of films 17 and 18 are aligned with each other and sandwich the side edges. Therefore, a pair of chain mechanisms 2
The reference numerals 2 and 23 are arranged on both longitudinal side edges of the pair of films 17 and 18, respectively.

A pair of horizontal sealing devices 24 for welding a pair of films 17 and 18 are provided along the feed direction of the chain mechanisms 22 and 23, respectively. Each horizontal sealing device 24 is provided so as to be vertically movable by an air cylinder 25, and includes a well-known welding blade 24a and a seal receiver 24b.

A pair of films 17 and 18 are disposed on the base end side in the feed direction of the chain mechanisms 22 and 23 so as to be orthogonal to the longitudinal direction of the pair of films 17 and 18. A vertical sealing device 26 is provided.
A fusing welding blade (not shown) is provided to be vertically movable.

The transport unit 14 includes two pairs of chain mechanisms 2.
A pair of films 1 so as to be able to approach each of the base ends 2 and 23;
Film guides 30 and 31 for holding the chain members 7 and 18 between the chain mechanisms 22 and 23 are provided. The film guides 30, 31 urge the leading ends of the pair of films 17, 18 sealed by the vertical sealing device 26 toward the pair of chain mechanisms 22, 23, respectively. For example, the film guides 30 and 31 are provided with a pair of rods or a pair of films 1 for pressing the tip portions of the pair of films 17 and 18.
Air is blown to the tips of 7, 18 to make the chain mechanism 2
These nozzles urge the pair of films 17 and 18 toward the sides 2 and 23.

Further, a film sensor 32 for detecting whether or not the pair of films 17 and 18 is held between the pair of films 17 and 18 is provided near the base end of each of the pair of chains 22 and 23. Have been. Film sensor 3
2 includes a light receiving element and a light emitting element, has a reflecting member 33 below the film passing space, reflects light from the light emitting element by the reflecting member 33 and makes the light incident on the light receiving element, and there is a film between them. The presence or absence of the film is detected by the difference in the intensity of the light incident on the light receiving element between when there is no film and when there is no film. The film sensor 32 may be an optical sensor, another proximity sensor, or a contact sensor.

The output of the film sensor is input to a chain controller (not shown) that drives the two pairs of chain mechanisms 22 and 23 independently of each other. The chain control device includes a pair of films 17 and 18 on both sides.
After each of the two chain mechanisms 2 and 23 are clamped,
2 and 23 are actuated and driven to pull out the pair of films 17 and 18. Specifically, two pairs of chain mechanisms 2
The pair of chain mechanisms 2 and 23 are always driven, and are provided so that both paired chain mechanisms 22 and 23 stop when only one of the chain mechanisms sandwiches the film.

The operation of the packaging apparatus 10 of this embodiment is as follows. First, as shown in FIG.
Put 2 on. At this time, the tips of the films 17 and 18 are fused and welded to each other by the vertical sealing device 26. Then, the product 12 is pushed by the pusher 15 in the direction of the film transport chain mechanisms 22 and 23, and at the same time, the film guides 30 and 31 also move toward the engagement portions of the pair of chain mechanisms 22 and 23. The film guides 30 and 31
In the vicinity of films 17 and 18, product 12 is film 1
Before abutting on the first and second films 7 and 18, the film guides 30 and 31 couple the pair of films 17 and 18 to the chain mechanisms 22 and 2.
Cut into 3. This operation is performed by the film guide 30,
31 directly presses the films 17 and 18 or blows air to urge the films 17 and 18 toward the chain mechanisms 22 and 23. Each of the pair of chain mechanisms 22 and 23 has the film 1
When the grippers 7 and 18 are held, the chains 22 and 23 are driven as they are, and the films 17 and 18 are pulled out. Also,
When one of the chain mechanisms 22 and 23 does not hold the films 17 and 18, the absence of the films 17 and 18 is detected by the film sensor 32, and the two pairs of chain mechanisms 2 and 23 are used.
The pair of chain mechanisms 22 and 23 that hold the film are stopped, and the pair of chain mechanisms 22 and 23 that do not hold the film continue to rotate. Then, when it is detected that both the chain mechanisms 22 and 23 hold the film, the pair of chain driving devices 22 and 23 are similarly driven as shown in FIG.

Then, as shown in FIG. 7, the films 17 and 18 are pulled out for a predetermined distance, and the product 12 is separated from the films 17 and 18.
After being sandwiched between the films 18, first, the vertical sealing device 26 is operated to perform fusing and welding of the films 17, 18. Next, the horizontal sealing device 24 is operated to perform welding in parallel with the traveling direction of the films 17 and 18. In this way, as shown in FIG. 4, the product 12 is wrapped with the products 17 and 18 and formed into a predetermined shape.

According to the packaging apparatus 10 of this embodiment, the films 17, 18 are utilized by using the film guides 30, 31.
Is reliably pulled out by the chain mechanisms 22 and 23 and is not drawn out by the product 12. Therefore, as shown in FIG. 20. Moreover, the drawing out of the films 17 and 18 has a simple structure using two pairs of chain mechanisms 22 and 23.

Further, since the chain mechanisms 22 and 23 also discharge the product 12 after welding is completed, the product 12 can be easily discharged to the outside of the packaging section 20 as it is.

The front and rear seals in the transport direction by the vertical sealing device 26 are wrapped in a sleeve shape.
When sealing together 7 and 18, it is difficult for tack to enter.
Since the films 17 and 18 are gripped by the chain mechanisms 22 and 23, tack does not enter the films 17 and 18 and the appearance of the packaging is good.

Incidentally, the packaging apparatus of the present invention is not limited to the above-described embodiment. For example, a chain for pulling out and conveying a film may be a belt instead of a chain. Further, the shape of the pusher, the sensor, the film mounting portion, and the like can be appropriately changed.

[0024]

According to the packaging apparatus of the present invention, the film can be reliably pulled out and transported irrespective of the product, and the product can be stably and automatically packaged without any collapse of the product.

[Brief description of the drawings]

FIG. 1 is a front view of a packaging device according to an embodiment of the present invention.

FIG. 2 is a plan view of the packaging device according to the embodiment of the present invention.

FIG. 3 is a schematic view showing two pairs of chain mechanisms and a peripheral portion thereof in the packaging apparatus according to the embodiment of the present invention.

FIG. 4 is a perspective view showing packaging by the packaging device according to the embodiment of the present invention.

FIG. 5 is a schematic diagram showing a state before packaging in a packaging process of the packaging device according to the embodiment of the present invention.

FIG. 6 is a schematic diagram showing a state in which a film is held by a chain mechanism immediately before packaging in a packaging process of the packaging apparatus according to the embodiment of the present invention.

FIG. 7 is a schematic diagram showing a state at the end of packaging in a packaging process of the packaging device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Packaging device 12 Product 14 Conveyance part 17,18 Film 20 Packaging part 22,23 Chain mechanism 24 Horizontal sealing device 30,31 Pusher

Claims (5)

[Claims] 1. A packaging apparatus for unwinding a pair of long films wound in a roll shape, positioning a product therebetween, sealing the four sides of the pair of films, and packaging the product. With a chain or belt mechanism to send out the pair of films in the longitudinal direction of the film, sandwiching the longitudinal side edges of the film together,
The chain or belt mechanism is provided in two pairs, and is located corresponding to each of both longitudinal edges of the pair of films,
A film guide for holding the pair of films in close proximity to the two pairs of chain or belt mechanisms with each of the chains or belt mechanisms is provided.When the product is disposed between the pair of films and sealed, the chain or A packaging device, wherein the film is drawn out by a belt mechanism, and the product is sent to a predetermined position of a sealing device together with the drawing out of the film. 2. A horizontal sealing device for welding the pair of films along the feed direction of each chain or belt mechanism, and a longitudinal direction of the pair of films at a base end side in the feed direction of the chain or belt mechanism. The packaging device according to claim 1, further comprising: a vertical sealing device that is disposed so as to be orthogonal to the pair of films and that seals the pair of films by fusing and welding. 3. The packaging device according to claim 1, wherein the film guide urges a tip portion of the pair of films sealed by the vertical sealing device. 4. The packaging apparatus according to claim 3, wherein the film guide is a pair of rods that press the front end portions of the pair of films or a nozzle that urges the front end portions of the pair of films by blowing air. . 5. A film sensor for detecting whether or not the pair of films is sandwiched between the pair of chains or the belt mechanisms is provided near the pair of chains or the belt mechanisms. 2. A chain or belt control device which drives the chain or belt mechanism to pull out the pair of films with the two pairs of chain or belt mechanisms after sandwiching the pair of films.
5. The packaging device according to 2 or 4.