JPH036042B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of covering at least the upper part of an article with a film.

For example, when packing a refrigerator or washing machine inside a cardboard box, Styrofoam is inserted as a cushioning material. In this case, if the foamed steel were brought into direct contact with the surface of a refrigerator or the like, it would have an adverse effect, such as causing scratches on the surface. Products such as refrigerators must also be dustproof and waterproof. To this end, as shown in FIG. 1, at least the upper part of the article 1 is covered with a film 2, and the polystyrene foam is brought into contact with the outer surface of the film 2, or the film 2 is used to provide dustproof and waterproof protection.

In the conventional coating method, as shown in FIG. 2, a film 2 fed by a roller 4 is placed over the top of an article 1 on a conveyor 3, and the film 2 is placed above the top surface of the article 1. A sealing device 5 seals and a cutting device 6 cuts. According to this conventional method, since the film 2 is supplied from above, the vertical height of the equipment becomes very high, which imposes restrictions on the installation location and makes maintenance and inspection difficult.
Further, as the film 2, a cylindrical one is used as shown in FIG. 3, and therefore, for example, when the article 1 becomes large in plan view, it is not possible to cover it with the film 2. In other words, one type of film 2 can cover almost only one type of article 1, and therefore articles 1 of various shapes can be coated.
This means that it cannot be adopted in lines where this flow occurs.

For example, a configuration shown in Japanese Patent Application Laid-open No. 112783/1983 has been proposed to accommodate articles of various shapes. In this conventional type, a supply roll is mounted transversely to the direction of load advancement and above the inlet member, which retains the shrinkable film such that the shrinkable film hangs on either side of the load at the delivery end of the inlet member. This shrinkable film is distributed as follows. and below the delivery end of the inlet member.
Cutting and welding equipment is provided for gluing and cutting the hanging sides of the film lave at the front of the load.

According to this conventional method, it is difficult to uniformly distribute the shrinkable film by the supply roll, and the amount of droop on one side tends to be longer or shorter than the amount of droop on the other side. As a result, it is not possible to provide a uniform coating over the entire circumference.

An object of the present invention is to provide a coating method that can reduce the height of the equipment, can be applied to articles of various shapes, and can always provide suitable coating.

In order to achieve the above object, the covering method of the present invention is a covering method of covering at least the upper part of an article with a film, which comprises folding both widthwise sides of a long film in the same direction to form a double shape;
A film having a cut along the entire length in the longitudinal direction formed by both side edges in the center of one surface is fed longitudinally along the article supply direction with the cut positioned downward, and the leading end of the film is Spread the sealed film so that both sides hang down from the other horizontal surface, then feed the article into the film so that the front side in the feeding direction contacts the sealed portion, and then At the side, the film is sealed and cut from the left and right directions.

According to the coating method of the present invention, since the film is fed horizontally, the height of the equipment can be made as low as just a little higher than the maximum height of the article. Further, when a film is fed in the longitudinal direction from a folded state, the lower side portions are automatically spread out so as to sag due to their own weight, and at this time, both side portions hang down evenly or almost evenly. Since the articles are supplied and sealed inside a long film that is spread out into a portal shape by hanging down, even if the articles have different shapes in plan view, the upper parts of these articles can be coated with the film. .

An embodiment of the present invention will be described below based on FIGS. 4 to 8. Reference numeral 10 denotes a long film, with both sides 10a, 10a in the width direction folded in the same direction to form a double film, and a cut 11 formed in the center of one side along the entire length in the longitudinal direction by both side edges. The film is previously wound into a roll with the cut 11 located on the outside. A roll-shaped film 10 is disposed on the side of a conveyor 13 that supports and conveys articles 12, and is guided above the conveyor 13 via a plurality of guide rollers 14, tension rollers 15, etc., and from there, With the cut 11 positioned downward, the material is fed along the conveyor 13 in its longitudinal direction and reaches a pair of upper and lower supply rollers 16 . A box frame-shaped guide frame 17 is disposed below these supply rollers 16, and the conveyor 13 passes through the lower part of this guide frame 17. A pin 18 is provided at the upper rear end of the guide frame 17.
Left and right levers 19A and 19B, which are attached so as to be able to swing left and right through A and 18B, extend rearward, and similar left and right levers 20A and 20B are attached to pins 21A and 21B at the lower rear end of the guide frame 17. It is installed through. Each left and right lever 19A, 19
The vertically opposing free ends of B, 20A, 20B are integrated by cylindrical connecting members 22A, 22B, thereby forming a pair of left and right swing frames 23A, 23B. Reference numeral 24 denotes a drive device for swinging the swing frames 23A and 23B towards each other and away from each other (swinging them open and close). It consists of a cylinder device 26 connected between the free ends of 25B. Said rocking 23A, 23
A stretching device 27 is provided between B to stretch the sealed portion of the film 10 in the vertical direction. That is, the expansion device 27 includes lifting levers 29A and 29B that are vertically swingably attached to the upper ends of the connecting members 22A and 22B via longitudinal pins 28A and 28B.
and a pulling body 31 attached to a connecting pin 30 connecting the inner ends of these lifting levers 29A, 29B.
It consists of. A seal/cut device is provided below the swing frames 23A, 23B. That is, the seal/cut device 32 has a cradle 33 provided on one side.
and a thermal blade 34 provided on the ground side.
3 and 34 are configured to be able to approach and separate from each other.

Both side parts 10a, 10a are folded into a double shape, and a cut 1 is made in the center of one side by both side edges.
1 is formed to have the full length in the longitudinal direction, and the film 10, which has been previously rolled into a roll with the cut 11 located on the outside, is guided by each roller 14, 15 while being pulled out, and then transferred to the conveyor 1.
3 and below its cut 11 , it is fed along the conveyor 13 in its longitudinal direction and reaches the feed roller 16 . This film 10
The film 10 is transported with its both sides 10a and 21a guided by the side surfaces of the guide frame 17.
From the position where it exits, both side portions 10a, 10a on one side are automatically expanded in a hanging shape by their own weight with respect to the other upper horizontal surface. Before carrying out the coating operation, the film 10 is coated as shown in FIG.
A seal portion A is formed at the tip end of the seal portion A, which was formed during the pre-forming process. Further, both swing frames 23A and 23B are opened by the operation of the drive device 24, and furthermore, both lifting levers 29A and 29B are stretched horizontally, and the pulling body 31 is in the lowering device. Therefore, the leading end of the film 10 is in a state where the front side in the feeding direction is closed so that the seal part A is located in the vertical direction at the center. In this state, the article 12 is conveyed by the conveyor 13, passes through the guide frame 17, passes between the two swing frames 23A and 23B, and comes into contact with the seal portion A side with its front side. Then, as the article 12 is further conveyed, the film 10 is pulled out in a hooked state.

As shown in solid lines in FIGS. 6-8, the conveyor 13 is stopped when the rear surface of the article 12 passes through the seal-cut device 32. Next, the drive device 24 is actuated to close the swing frames 23A, 23B so as to approach the connecting members 22A, 22B, as shown by the imaginary lines in FIGS. 6 and 7. As a result, both the lifting levers 29A, 29B move upward around the longitudinal pins 28A, 28B, and the lifting body 31 lifts the upper horizontal position of the film 33 as shown in the phantom lines in FIGS. 6 and 8. The center of the shaped part is pulled up, and the part corresponding to the seal/cut device 32 is expanded in the vertical direction. Next, the sealing/cutting device 32 is operated to seal and cut the above-mentioned expanded portion as shown by the imaginary line in FIG. This creates a new seal A. Sealing in the expanded state in this manner may provide a clean sealing surface and may enable a reliable seal. By the above operations, the film 10 can be coated on the top of the article 12, and the article 12 is conveyed rearward. After that, the cradle 33 and the hot blade 34
By separating them and opening both swing frames 23A and 23B, the state before the work shown in FIG. 5 is returned to.

In the embodiment (drawings), a transparent film 10 is used, but it may be semitransparent or opaque.

According to the coating method of the present invention having the above configuration,
You can expect the following effects. That is, since the film is fed horizontally, the height of the equipment can be made low, only slightly higher than the maximum height of the article, and the overall structure can be made compact. In addition, when a film is fed in the longitudinal direction from a folded state, the lower side parts are automatically unfolded in a sagging shape due to their own weight, and at that time, both sides are made to hang down evenly or almost evenly. This allows a suitable coating to be uniformly coated all around the circumference. Since the articles are supplied and sealed inside a long film that is expanded into a portal shape by hanging down, even if the articles have different shapes in plan view, it is possible to cover the upper part of these articles with the film. Therefore, it can also be employed in solutions in lines where articles of various shapes flow.

[Brief explanation of the drawing]

1 to 3 show conventional examples, FIG. 1 is a perspective view showing the article after coating, FIG. 2 is a schematic front view showing the coating method, FIG. 3 is a perspective view of the main part of the film used, 4 to 8 show an embodiment of the present invention,
4 is a perspective view of a main part of the film used, FIG. 5 is a perspective view, FIG. 6 is a front view, FIG. 7 is a plan view, and FIG. 8 is a partially cutaway side view. DESCRIPTION OF SYMBOLS 10... Film, 10a, 10a... Both sides, 11... Cut, 12... Article, 13... Conveyor, 16... Supply roller, 17... Guide frame, 23A, 23B... Rocking frame, 24 ... Drive device, 27 ... Expansion device, 31 ... Pulling body, 3
2...Seal/cut device, A...Seal portion.

Claims (1)

[Claims] 1. A covering method in which at least the upper part of an article is covered with a film, in which both sides of the long film in the width direction are folded in the same direction to form a double shape, and a cut is made in the center of one side along both side edges. A film formed to the full length in the longitudinal direction is fed in the longitudinal direction along the article supply direction with the cut at the bottom, and the film with the tip end sealed is placed against the other upper horizontal surface. A coating method in which the article is spread into the film so that both sides thereof hang down, and then the article is fed into the film so that the front side in the feeding direction is in contact with the sealing part side, and the film is sealed and cut from the left and right directions on the rear side of the article. .