JPH04367406A - Packaging method for article-to-be-packaged by film - Google Patents

Abstract

PURPOSE:To provide a packaging method for an article-to-be-packaged by a film, by which polystyrene foam products stacked in multi-layers can be packaged under a condition in which a plastic film is evenly joined to the outer surface of the products without generating wrinkles. CONSTITUTION:For the title packaging method, a process in which a film 4 without a seam, which is fed from one film roll 4a is put on four surfaces of articles-to-be-packaged 1 which is stacked in multi-layers in such a manner that the sealing allowance of the film 4 is located at one side bottom of the articles-to-be-packaged 1, and a process in which the sealing allowance of the film 4 is sealed under a condition in which the articles-to-be-packaged is slightly compressed in the height direction are performed. Then, a process in which the film 4 is joined to the articles by the recovery force in the height direction of the articles-to-be-packaged by releasing previously mentioned compressing is performed. Then, processes to put free ends of the film 4, which project from both sides of the articles-to-be-packaged along both side surfaces of the articles-to-be-packaged and to seal them are continuously performed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a method for packaging products using a film that can wrap plastic films in a state in which they are uniformly adhered to the outer surface of multi-tiered polystyrene foam products without the occurrence of wrinkles. It is related to.

0002

[Prior Art] For example, in a factory that produces styrofoam products for packaging electrical products, etc., a plurality of styrofoam products are lined up, and the whole product is automatically wrapped in a plastic film such as polyethylene and shipped. ing.

However, in this type of conventional automatic packaging, the plastic film is supplied from two film rolls placed one above the other, so the products to be packaged are stacked horizontally in a horizontally long state. It was necessary to bring it in. As a result, it is difficult to apply sufficient tension to the film between the two upper and lower films while wrapping the packaged product, which may cause wrinkles to appear on the surface of the film or the product to be packaged within the film after wrapping. There was a problem in that it moved and became difficult to handle. In addition, as a way to solve this problem, it may be possible to attach a film to the horizontally stacked packaged items in a horizontally compressed state and use the restoring force to create close contact between the packaged items and the film. However, since the feeding direction of the film and the compression direction of the packaged product do not match, it is not possible to apply sufficient tensile force to the film, making it impossible to reliably prevent the occurrence of wrinkles. There is a problem in that a special device is required for this purpose, making the packaging device complicated and large.

0004

Problems to be Solved by the Invention The present invention solves the above-mentioned conventional problems, and makes it possible to wrap products while applying sufficient tensile force to the film. The appearance of wrinkles can be reliably prevented,
Moreover, it is an object of the present invention to provide a method of packaging products using a film that adheres uniformly and makes it extremely easy to handle the packaged products after packaging, and does not make the packaging device complicated or large. It is complete.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the method of packaging products using a film of the present invention is designed to solve the above-mentioned problems. A seamless film supplied from a single film roll is applied to the four opposite sides of the package so that the sealing area is located below one side of the packaged product, and the packaged product is placed in the height direction. Seal the sealing margin of the film while compressing it slightly, and then
The above pressure is released and the restoring force in the height direction of the packaged product brings the film into close contact with the four sides, and then the free ends of the film extending from both sides of the packaged product are brought into contact with the packaged product. It is characterized by being sealed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained in detail based on the illustrated embodiments. The drawing shows an automatic packaging machine that covers and wraps a plurality of Styrofoam products stacked in multiple stacks with a plastic film such as polyethylene film. A carry-in conveyor for carrying the product 1 into the work station 3; 4 a film for wrapping the packaged product 1; 5;
1 is a finished product covered and packaged with a film 4, and 6 is a conveyor for carrying out the finished product 5 to the next process.

The direction of the film 4 is switched by a guide bar 7 from one film roll 4a disposed on the side of the apparatus, passes through the upper entrance of the workstation 3, and is pulled out to the film gripping member 8 at the lower part of the entrance. It is something that is checked. Then, as shown in FIG. 2, the packaged product 1 is pushed into the workstation 3 while keeping its front side against the film 4, and the packaged product 1 is pushed into the workstation 3 with its front surface and upper and lower surfaces.
The film 4 is applied to the surface, and then the extension part of the film 4 is pressed down by the seal bar 9 from above the back surface of the packaged product 1, and the film 4 is also applied to the back surface of the packaged product 1, thereby sealing the seam. The four surfaces of the upper and lower and front and rear surfaces are covered with a film 4 without any material. In this case, the sealing margin of the film 4 is adjusted so that it is located at the lower end of the back surface of the packaged product, which is the part where the seal bar 9 is pushed down.

Next, the packaged product 1 whose four sides are covered with a film is placed between the workbench 3a and the top surface of the packaged product 1 by a pressing member 10.
At the same time, the sealing margin is compressed by the film gripping member 8 and the sealing bar 9.
Heat welded between the two. At this time, since the products 1 to be packaged are stacked in multiple stages in the height direction, the pressing member 10
Due to the pressure, the gaps between the items constituting the packaged item are compressed and easily shortened in the height direction. Further, as shown in FIGS. 3 and 4, the pressing member 10 is provided with an air jet pipe 10a on the outer periphery of a pressing piece 10b, and the pressing piece 10b presses the packaged product 1 from above. At the same time, air is ejected from the air jet tube 10a toward both side surfaces of the packaged product 1, and the air is spread in the direction of both sides so as not to wrinkle the film covering the top surface of the packaged product.

At the same time, the free ends of the film extending from both sides of the packaged product 1 are supported by a film support mechanism 11 located at the same height as the packaged product 1, preventing the film from bending downward. This is intended to more reliably prevent the occurrence of wrinkles. This film support mechanism 11 consists of two support bars 1 whose width is adjusted to correspond to the width of the top surface of the packaged product 1, as shown in FIGS. 5 and 6.
1a and 11a, the support bar 1
1a is rotated by the operation of cylinder 11b, and maintains a horizontal position only when supporting the film, and in other cases, it is configured to rotate 90 degrees and point the tip downward so as not to get in the way.

Next, when the pressing member 10 rises and the pressed state of the packaged product 1 is released, the packaged product 1 stretches in the height direction due to the restoring force and is separated from the already sealed film. The four sides (top and bottom, front and back) are brought into perfect contact with each other. Thereafter, the support bar 11a of the film support mechanism 11 is lowered, and the free ends of the film that protrude from both sides of the packaged product are sealed on the left and right sides by another side sealing mechanism 12 for sealing the well-known free ends as shown in FIG. The sides are sealed along with the packaged product to form a finished product, and the product is transferred to the unloading conveyor 6.
will be transported towards. The product, which has been packaged with the film coated on the outer surface obtained in the above manner without any wrinkles and evenly adhered to it, is transferred to the next process, and at the same time, the next process is carried out in the workstation 3. Items to be packaged will be brought in and subjected to the same packaging process.

[0011]

[Effects of the Invention] As is clear from the above explanation, the present invention enables packaging of products with sufficient tensile force applied to the film, thereby reliably preventing wrinkles from forming on the surface of the film. In addition, it is possible to prevent this from occurring, and it is also possible to make the handling of the packaged products extremely easy after packaging by ensuring uniform adhesion, and it is possible to make the packaging device extremely simple without making it complicated and large. It is something. Therefore, the present invention greatly contributes to the development of industry as a method of packaging products using a film that eliminates the problems of the conventional methods.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an example of an automatic packaging machine implementing the present invention.

FIG. 2 is a partially cutaway perspective view showing essential parts of the embodiment.

FIG. 3 is a partially cutaway front view showing the pressing member.

FIG. 4 is a partially cutaway side view showing the pressing member.

FIG. 5 is a partially cutaway plan view showing the film support mechanism.

FIG. 6 is a partially cutaway side view showing the film support mechanism.

[Explanation of symbols]

3 Workstation 4 Film 4a Film roll 10 Pressing member 11 Film support mechanism 12 Side seal mechanism

Claims (3)

[Claims] Claim 1: Seamless film supplied from a single film roll is applied to four sides, the top and bottom surfaces and one opposing side surface of the multi-tiered packaged products being carried into a work station, with a sealing margin of The film is placed so as to be positioned below one side of the packaged product, and the packaged product is pressed in the height direction to shrink the film slightly, and the sealing margin of the film is sealed, and then the pressure is released. The film is brought into close contact with the four surfaces by the restoring force in the height direction of the packaged product, and then the free ends of the film extending from both sides of the packaged product are aligned with the packaged product and sealed. A method of packaging products using a film that uses 2. The method for packaging an item with a film according to claim 1, wherein the upper surface of the film is stretched by air jetted in the transverse direction while pressing the item. 3. The packaged product is packaged using the film according to claim 1 or 2, wherein the free end of the film extending from both sides of the packaged product is supported by a film support mechanism while pressing the packaged product. Packaging method.