JP2002114210A - Cushion-less packing, and machine and method for fitting film for the packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushion-less packing in which restriction of an article to be packaged is sufficient due to heat shrinkage of a shrink film. SOLUTION: The shrink film 22 in which a large number of pin points are provided or adhesive 17 is applied at a predetermined position of a back side in a dotted or spiral manner is inserted from an opening part 16 in a packaging box 10 with a top flat in an unsealed condition, and adhered to an inner bottom surface 12 of the packaging box and/or a part of an inner surface 14 of a side wall, and the article 18 placed on the non-adhesive surface side of the film adhered to the inside of the box is integrally restricted in the packaging box by heat shrinkage of the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material without cushioning material, and more particularly to a film mounting machine and a film bonding method for bonding a shrink film to a predetermined position on the inner surface of a packaging box in order to make a packaging material without cushioning material. About.

[0002]

2. Description of the Related Art In order to prevent breakage of articles to be packaged during operations such as sorting, transportation and storage after article packaging, as a cushioning material to be filled in a packaging container, a plastic foam molded body represented by polystyrene is used. It is used in large quantities because of its light weight, low price and excellent cushioning. However, they are discarded after being removed after they are taken out.However, from the viewpoint of protecting the global environment by using recyclable resources, replace them with other biodegradable materials that can be harmlessly incinerated, such as pulp molded products. Is recommended. But,
The problems of complicated and time-consuming filling of the cushioning material, bulkiness, and waste of volume ratio are still not improved. For this reason, Japanese Unexamined Patent Application Publication No. 11-70600 proposes a so-called cushioning-less packaging method that does not use a cushioning material.
This method detects the dimensions of the cardboard boxes while sequentially transporting the cardboard boxes of different dimensions on the horizontal conveyor, and sets the position of the adhesive spray gun, the descending stroke, etc. accordingly, and sets them accordingly. An adhesive is applied to the inner bottom surface of the cardboard box from the spray gun moved to the position, and a fixed length of shrink film is dripped into the cardboard box and bonded. Next, the packaged product or packaged product is stored on the non-adhesive surface side of the film, the film is lightly covered and sent to a shrink tunnel, and the packaged product is integrally restrained in a cardboard box by heat shrinkage of the film, and a cushioning material is provided. Less packaging.

[0003]

The manufacturing method of the cushioning-less package described above is based on a method in which an adhesive is applied to a predetermined position on the inner bottom surface according to the size of a cardboard box transferred by a horizontal conveyor, and then the inside of the cardboard box is removed. Since a certain length of shrink film is dropped and pushed in and bonded, the film can be mounted in cardboard boxes of various sizes, but the entire apparatus becomes large, and the operation becomes complicated and expensive. Moreover,
Since the shrink film is mounted on the entire inner surface of the cardboard box, even if the film is thermally shrunk, the packaged product is not sufficiently restrained, and thus has poor cushioning properties, and easily moves into the box and is easily damaged. The present invention provides a buffer-less package in which the package is sufficiently restrained by heat shrinkage of the film, and has an effect on the ability to mount the film on cardboard boxes of various sizes by a relatively small device. It is another object of the present invention to provide an apparatus and a method capable of efficiently mounting a film without using the apparatus.

[0004]

In order to achieve the above object, the present invention is to efficiently mount a film by pushing a film coated with an adhesive into a packaging box. That is, claim 1 inserts a shrink film in which a large number of pinpoints or dotted lines or spirals are applied to a predetermined position on the back surface from the opening of the packaging box in the open state of the top plate flap, and inserts the shrink film. And / or a cushion-less material in which an article to be packaged which is adhered to a part of the inner surface of the side wall and stored on the non-adhesive surface side of the film adhered in the box is integrally restrained in the packaging box by heat shrinkage of the film. It is a package.

[0005] A second aspect of the present invention is to provide a roll-shaped shrink film supported so as to be able to be unwound, and a packaging box in a state where a top plate flap is opened is tilted in a vertical plane perpendicular to a running direction from the roll-shaped shrink film. A supply conveyor for transferring the extracted film to the mounting position and then sending the film out of the machine; and a film provided at the film mounting position and covering the opening portion of the packaging box with a film corresponding to substantially the cross-sectional length of the inclined packaging box. A film withdrawing mechanism for drawing out; a pinpoint, dotted line, or spiral adhesive or elastic adhesive at a position on the back surface of the shrink film being drawn, which is to be an adhesive portion to the inner bottom surface and / or the inner surface of the side wall. Means for applying adhesive or means for intermittently applying an adhesive tape having a buffer function; Pressing means for pressing the adhesive-applied portion on the back surface of the film to the inner bottom surface and / or the inner surface of the side wall of the packaging box by pushing the film into the packaging box with a baffle plate; And a film cutter for cutting.
According to a third aspect of the present invention, when inserting the shrink film into the packaging box in the opened state of the top plate flap, the shrink film advances inside from the upper edge of the opened top plate, and the adhesive application portion of the shrink film is placed on the inner surface of the packaging box. It is provided with a guide roller for holding it so as not to be rubbed.

According to a fourth aspect of the present invention, the packaging box in the opened state of the top plate flap is transferred into the shrink film mounting machine in a state where the packaging box is inclined to a vertical plane perpendicular to the running direction; after the positioning of the packaging box is stopped at the film mounting position. Applying an adhesive in the form of a pinpoint, a line, or a spiral to the back surface of the packaging box while covering the opening of the packaging box in an inclined state and pulling out a shrink film corresponding to a substantially sectional length of the packaging box; The middle portion of the drawn film is pushed into the packaging box with a push plate, so that the adhesive applied portion on the back surface of the film is adhered to a part of the inner bottom surface and / or the inner surface of the side wall of the packaging box; Cut the upstream end of the drawn film and carry it out of the film mounting machine. After loading the packaged product or the packaged product on the non-adhesive surface of the adhered film, lightly wrap it. Crowded sent to the heat-shrink unit, etc. in a buffer material-less packing-body film bonding method characterized by constraining together the packaging box in a packaged article by heat shrinking the film. In the case where the size of the packaging box in the opened state of the top plate flap is different, the width of the packaging box is determined by means such as an air cylinder or a motor or a ball screw.
After adjusting each of the height and length elements, the packaging box is set at a predetermined position and a shrink film is inserted.

As described above, the packaged article or group of articles to be packaged is stored on the non-adhesive surface of the film adhered to the inner bottom surface and / or the inner side wall of the packaging box with the top plate flap opened. After the film ends are overlapped to the top and side surfaces, the film is sent to a heat shrink unit, etc., and the film is thermally shrunk to constrain the packaged product or packaged products in a packaging box, and then the top plate flap is sealed. And a cushion-less package.

[0008]

FIG. 1 is a sectional view of a packaging form (package body 19) of the present invention, and FIG. 2 is a perspective view showing a state in which a film as a packaging material is pushed into a packaging box. As shown in FIG. 1, the package 19 of the present invention is obtained by opening a shrink film 22 having a large number of pinpoints, dotted lines, or spirals (swirl) applied to a predetermined position on the back surface in a top plate flap opened state. Of the packaging box 10 and bonded to a part of the inner bottom surface 12 and / or the side wall inner surface 14 of the packaging box (FIG. 2). Film 22 adhered in the packaging box
After the packaged product or packaged product group 18 is stored on the non-adhesive surface side of the package and the film ends overlap the top and side surfaces of the packaged product or packaged product group, the packaging box 10 is shrunk by the heat shrinkage of the film 22. Restrain in one. Next, the top plate flaps 15 and 15 are abutted to each other with a gum tape or stapler. In the figure, 11 is a bottom plate of the packaging box, and 13 is a side plate. Although a cardboard box, a carton box, or the like can be used as the packaging box 10, an example using a cardboard box will be described below. [Cardboard box] Model: Type A Medium size: 319W x 471L x 385H (body height h225) mm Small size: 320W x 350L x 290H (body height h130) mm [Packaging material] Material: Heat shrinkable PE Film (flat roll) Dimensions: inner diameter 76mm, outer diameter 240mm, width 500-400mm

FIG. 3 is a side view of the film loading machine, and FIG. 4 omits the illustration of the unwinding section 27, the tension roller 53, the film guide roll 29, the film pull-out mechanism 35 and the pushing means 40 of FIG. It is a top view. The film mounting machine 20 includes a roll-shaped shrink film 22a that is supported so as to be able to be unwound, a film unwinding unit 27, a supply conveyor 23 that sends out the packaging box 10 with the top plate flap unsealed, and a top surface of the opening of the packaging box. A film withdrawing mechanism 35 that stretches the film toward, a means 30 for applying the adhesive 17 to the back surface of the film being withdrawn, a pushing means 40 for pushing the adhesive-coated film into the packaging box and bonding the same, A film cutter 33 for cutting the upstream end of the film drawn in the packaging box;
34 as a main part. FIG.
Reference numeral 55 denotes an operation panel.

In this mounting machine, a film is drawn out from the roll-shaped shrink film 22a set on the overlaid unwinding free rollers 25, 25 in a twin system.
As shown in FIG. 3, the film unwound by the film unwinding unit 27 passes through a drive roller 28, a tension roller 53, and a film guide roll 29, and is placed on the supply conveyor 23 in a packaging box (cardboard box) in an opened state on the top surface. ) 1
0 so as to cover the upper surface of the opening 16. The supply conveyor 23 is installed diagonally (for example, at an inclination of 30 °) in a vertical plane perpendicular to the traveling path, and a guide conveyor 24 having a traveling surface perpendicular to the inclination is provided, and both conveyors position the oblique corners of the cardboard box. At the same time, the width of the entire unit is reduced at a slant. Between the rollers at predetermined positions of the supply conveyor 23, there are a loading positioning stopper 26 capable of adjusting the stop position and a plate 48 for adjusting the width position. Further, the guide conveyor 2
A plate 46 for height adjustment is provided between the rollers at the predetermined position 4. The supply conveyor 23 and the guide conveyor 24 in the illustrated example are provided with a counter shaft extending in a direction perpendicular to the rollers below a number of rollers, and a round belt is wound between each roller and the counter shaft. Although a belt driven roller conveyor has been shown, other types of conveyors may be substituted.

The film withdrawing mechanism 35 is for withdrawing the film 22 corresponding to the length covering the opening 16 of the packaging box 10 in an inclined state (substantially the cross-sectional length of the box in the top opened state). As shown in FIG. 3, more specifically, as shown in FIGS. 13 to 15, a pair of right and left timing belts are arranged at a position approaching the opening of the packaging box 10 and near the width end of the twin type film. 36, a timing belt driving device 37, several fixed nippers 38 fixed to the frame 21,
It is composed of a bar 39a passed between them, and several movable nippers 39 fixed to the bar 39a. The fixed nipper 38 and the movable nipper 39 in the illustrated example are for turning on and off the upper and lower plates, claw pieces, and the like facing each other by an air drive type, an electromagnetic drive type, or a vacuum suction type. It may be replaced with one having an adhesive function.

The adhesive applying means 30 is provided on the back surface of the shrink film being pulled out at a position to be bonded to the inner bottom surface and / or the inner surface of the side wall of the packaging box. As shown in FIG. 3, a hose 31 from a hot melt applicator and a nozzle head (spray gun) 32 for applying an adhesive to the back surface of the film guided by the film guide roll 29, as shown in FIG. It consists of The adhesive is sprayed in a predetermined pattern such as a pinpoint or dotted line pattern based on a spray command to a predetermined position by count management of an encoder (not shown) attached to the timing belt driving device 37. In the illustrated example, a hot melt adhesive is used, but another adhesive may be used. For example, an elastic adhesive having a high elasticity and a buffering property among silicone, polysulfide, polyurethane, and the like can be used in addition to a reactive hot melt and an adhesive hot melt instead of a solvent-based adhesive. If a PE film is used as a shrink film to be inserted into a cardboard box and non-polluting hot-melt adhesive or elastic adhesive is used, no harmful substances will be generated even if incinerated as waste. In place of the adhesive applying means, a double-sided adhesive tape having a buffering function on the tape itself by foam, sponge material, or the like is intermittently attached to provide a film attaching surface with a buffering function (shown in the figure). (Omitted) may be used.

The film pushing means 40 pushes an intermediate portion on the front surface side of the film 22 drawn over the opening 16 of the cardboard box with a pushing plate 42, thereby causing the adhesive applied portion 17 on the back surface of the film to be inserted into the cardboard box. It adheres to the inner bottom surface and / or the inner surface of the side wall. This pushing means essentially includes a pushing air cylinder 41 installed at the same inclination angle as the box and a pushing plate 42 provided on the piston rod of the air cylinder 41. As shown in FIG. 3, two side wall push plates 43, side push links (toggle links) 44 and side push springs 45 are provided to face the side plates of the box. Since the push plate 42 pushes the film 22 toward the inner bottom surface 12 of the box, the push plate 42 is a rectangular plate smaller than the inner bottom surface of the box, and an air pad is attached to the push plate 42 and the side wall push plate 43 to push and adhere the film. Can be further improved. A height adjusting plate 46 is provided between the rollers of the guide conveyor 24 so as to face the push plate 42, and the height of the cardboard box at the film mounting position is adjusted by the adjusting cylinder 47. Further, a film cutter 33 and a receiving plate 34 are provided on a frame near the fixed nipper 38 in order to cut an upstream end of the film 22 mounted in the packaging box. The capacity of this film loading unit is 10-12 boxes or more per minute in a two-head system.

Next, a mounting method will be described. The cardboard boxes 10 with the top plate flap unsealed sent from a box making machine (not shown) are placed on the supply conveyor 23 in a state of being inclined two by two, and are automatically inserted into the film mounting machine 20 at predetermined intervals. Transfer. Tilt of a cardboard box at a normal supply speed can be sufficiently handled by hand, but for high-speed supply of large cardboard, a tilting device with a pusher is arranged upstream of the film loading machine. If this is done, the tilting work can be performed more efficiently.

The cardboard box carried in by the supply conveyor is stopped at the film mounting position. On the other hand, from the roll-shaped shrink film 22a set on the top-up type unwinding free rollers 25,
Pull out. While being pulled out so as to cover a predetermined length of the film 22 on the upper surface of the opening of the inclined cardboard box 10 stopped at the film mounting position, the back surface serves as an adhesive portion to the inner bottom surface and / or the inner surface of the side wall of the packaging box. Two rows of hot melt adhesives 17 are applied to the positions in a pinpoint, dotted line or spiral shape (see FIG. 2). As described above, the adhesive is applied by driving the injection gun 32 based on the injection command to a predetermined position by the count management of the encoder (not shown) attached to the timing belt driving unit 37, and the pinpoint, dotted line, etc. Inject into the pattern.

FIG. 5 is an enlarged side view showing a state in which the movable nipper 39 of the film unwinding mechanism in FIG. 3 is at the home position. The pushing plate 42 is at the rising end and a cardboard box is supplied to the film mounting position. The tip of the film 22 slightly protruding from the fixed nipper 38 is
Is gripped by FIG. 6 shows that the cardboard box 10 is supplied to the film mounting position, and at the same time, the shrink film 22 is pulled out by the movement of the movable nipper 39 gripping the end of the shrink film while the fixed nipper 38 is turned off. It is a side view in which a melt adhesive is sprayed for a predetermined length. FIG. 7 shows the completion of film withdrawal.
While raising the guide roller 49, the guide plate 49 is brought close to the opening top plate flap side of the cardboard 10, and
It is a side view of the state which pressed down the cardboard box with 4. When inserting the shrink film 22 into the packaging box 10 in the opened state of the top plate flap, the guide roller 49 advances inside from the upper edge of the opened top plate flap, and the adhesive application portion of the shrink film is placed in the packaging box 10. Hold so as not to rub against the inner surface. FIG. 8 is a diagram showing a state in which the cardboard box 10 is pushed from the holding by the holding plate 54 to drive the cylinder 41, the pushing plate 42 is pushed into the cardboard box 10, and the film 22 is adhered in the cardboard box. The film is stretched by a guide roller 49. FIG. 9 is a side view showing a state where the upstream end of the film withdrawal is cut by the cutter 33 after the film nip is released. FIG. 10 shows a state in which the film is completely mounted,
After raising the push plate 42 to the standby position by retreating and returning to the push cylinder, the film spray cylinder 51 advances the film spray pipe 50 and blows air to the upper film hanging outside the top plate flap to blow the cardboard. FIG. 4 is a side view of a state in which a film is attached to the upper surface of the box 10.

If the size of the packaging box in the opened state of the top plate flap is different, the width, height, and length of the packaging box are adjusted by means of an air cylinder, a motor, a ball screw, or the like. Thereafter, the packaging box is set at a predetermined position, and a shrink film is inserted. 11 and 12 show a corrugated cardboard 1 having a small outer dimension (longitudinal dimension).
0a is supplied along the supply conveyor 23 and the guide conveyor 24. When each conveyor stops at the stopper 26, the height adjustment cylinder 47 and the height adjustment plate 46 are supplied. And the cardboard box 10a by the width adjusting cylinder 52 and the width adjusting plate 48.
Is lifted to a predetermined position, and thereafter, after the film is inserted and compressed in the same steps as in FIGS. 6 to 10, the cardboard box 10 a is returned to each conveyor again, and is carried out of the machine by driving each conveyor. You.

FIGS. 13 to 15 show patterns of adhesive application. FIG. 13 is a plan view showing the positional relationship between the fixed and movable nippers before the start of film drawing. FIG. 14 is hot melt bonding at the same time as the film drawing starts. FIG. 15 is a plan view showing a state in which the hot-melt adhesive is continuously ejected while drawing out the film from FIG.

As described above, a hot melt adhesive is sprayed onto a predetermined portion of the back surface of the film in the middle of being pulled out, the film is pushed into the cardboard box, and the film is bonded to a part of the inner bottom surface and / or the inner surface of the side wall. Is a fixed nipper 38
Is turned on to cut, the stopper 26 of the conveyor is released, and the packaging box is carried out of the film mounting machine. Next, the packaged product or packaged product group 1 is placed on the non-bonded surface of the bonded film.
The package 8 is housed, overlapped to the side thereof, lightly wrapped and sent to the heat shrink unit 60, where the film is thermally shrunk to constrain the article to be packaged integrally in the packaging box.
After this, the top plate flap is abutted and sealed to form the cushioning-less package 19.

The heat shrinkage of the film can be performed manually, for example, by blowing hot air on each film. However, if a shrink tunnel is used, the film can be efficiently blocked in a short time. FIG. 16 is a side view showing an example of the heat shrink unit. The heat shrink unit 60 has a heat-resistant belt conveyor 62 running along the longitudinal direction of the base 61, and a shrink tunnel portion 65 is provided on an upper portion thereof. Shrink tunnel part 6
A number of heaters 66 and a fan motor 66 are attached to the center of the group of heaters on the upper plate 5, and a belt driving unit 63 is arranged on one side of the base 61, and an operation panel 64 is arranged at the lower center.

FIG. 17 is a cross-sectional view of the packaging box of FIG. 2 in a state of being filled with the article to be packaged. FIG. 18 is a cross-sectional view showing a state in which the film is covered over the entire packaged article with the film end portions overlapping. FIGS. 19A and 19B show another embodiment of the film fixed in the packaging box. FIG. 19A shows a state in which the film is adhered at a position shifted to one side of the inner bottom surface and at several places on the side wall on the shifted side to cause heat shrinkage. (B) is a cross-sectional view of a state where the film is bonded and heat shrunk at several places on the inner bottom surface, and (c).
FIG. 3 is a cross-sectional view showing a state where a film is bonded and heat-shrinked at several places on opposing side walls.

According to the film mounting mode of the present invention, the film is adhered to the inner bottom surface / side wall inner surface of the packaging box in a face or dot shape (for example, bottom face: imposition, side face: spotting). Since the side wall inner surface (both sides / one side) or only the side surface can be adhered, the film may be misaligned when stored according to the shape / weight, storage quantity, storage method, etc. of the storage item (packaged product) 18. Easy to store without. In addition, when the storage items are different, for example, when the storage amount is small and light, a part of the side wall adhesive portion or a selected backing portion is peeled off after storage to stabilize the storage items, and then the film edge and the side surface are removed. Overlap and shrink. On the other hand, when the storage items are heavy, large, or large in number, the end portions of the film are overlapped while leaving the side wall adhesive portions.

The above embodiment has the following advantages. 1) Instead of hot-melting the packaging box, apply a hot-melt adhesive to the back surface of the film (film reversal surface) when drawing out the film. This makes the machine compact with space saving for hot melt. An oil pan can be installed to prevent hot melt from dripping. 2) The pulling of the film is started according to the presence or absence of the box on the upstream side (one or two), and the film is pushed into the box. As a result, the "package box" is immediately bonded without leaving the "package box" in the hot melt spray applied state. 3) The packaging box is transported in an inclined state in a plane perpendicular to the traveling direction, and the film is bonded into the packaging box by pressing a push plate from an obliquely upper side, so that the positioning of the box relative to the size of the box and the film length are performed. Is easy to adjust and the machine is compact and easy to maintain. 4) It has a high-quality buffer function even if the storage ratio of the product in the packaging box is somewhat low. That is, by bonding a belt-like polyethylene film to the bottom surface inside the box (after storing the product in it and covering the edges of the film), heat is applied,
The product is fixed so that it wraps around the product from below. Therefore, as compared with the conventional packing method using the cushioning material, the work of packing the cushioning material, removing the cushioning material, and treating the waste material after opening is not required, and labor and labor can be saved, and material costs can be reduced.

[0024] The present invention relates to damage to shipments at distribution centers in the wholesale and mail order businesses of cosmetics, pharmaceuticals, daily necessities, stationery, apparel, etc., and at distribution centers for printed materials such as corporate catalogs, pamphlets and computer books. For prevention, it can be dealt with by blocking the film instead of using a cushioning material such as polystyrene, and can be used in packing at the time of distribution to prevent damage to small articles from perforated booklets. Further, as compared with the conventional film mounting machine, the cushioning performance is higher in quality (the shape of the stored products, the weight varies, and the number of stored products varies), and the cost is lower and the appearance is better. In addition, the stored products can be moved within the cardboard box without being affected by the number of stored products (packaged products), storage method (standing the products vertically or distributing them, etc.), shape and weight. And produce a film packaging form that is not damaged.

[0025]

As described above, in the cushioning-less package according to the present invention, the film coated with an adhesive at a predetermined position on the back surface is adhered to the bottom surface and the inner surface of the side wall of the packaging box, and the surface to which the film is adhered in the packaging box. After the packaged product is stored, the product (packaged product) is constrained collectively by the blocking phenomenon of the film due to heating. Therefore, it is affected by the number, storage method, shape, and weight of the product. The product can be firmly fixed without using a buffer material such as polystyrene, and a good buffer effect can be obtained. The film mounting machine and the mounting method include a part for supplying a cardboard box to a predetermined position for a predetermined time, a part for setting a roll-shaped film, a part for drawing out a film, a device for applying an adhesive, and a part for cutting a film. It consists of a part where the film is pressed against the bottom surface of the cardboard box and the inner surface of the side wall, etc., so that the application range of the machine for the size of the cardboard box is wide, low cost, excellent in aesthetics, high capacity and compact. , Thin film (0.04
mm or less). In particular, since the packaging box is transported in an inclined state in a plane perpendicular to the traveling direction and the film is adhered to the inside of the packaging box by pressing the push plate from the obliquely upper side, the positioning of the box relative to the size of the box and the film length. Adjustment is easy, the machine is compact and maintenance is easy. Furthermore, since the shrink film inserted into the cardboard box is made of PE film and non-polluting glue is used as the hot melt adhesive, even if the cardboard box after taking out the packaged goods is incinerated as waste, harmful substances This is an environmentally friendly method that does not cause any problems.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a packaging form (package) of the present invention.

FIG. 2 is a perspective view showing a state where a film is pushed into a packaging box.

FIG. 3 is a side view of the film mounting machine.

FIG. 4 is a plan view of the film mounting machine.

FIG. 5 is an enlarged side view showing a state in which a movable nipper of the film pull-out mechanism in FIG. 3 is at an origin position, and a tip of a film slightly protruding from a fixed nipper is gripped by the movable nipper.

FIG. 6 is a side view showing a state in which the movable nipper is driven to draw out the film by a predetermined length. At the same time as the cardboard box is supplied to the film mounting position, the shrink film end is gripped while the fixed nipper is turned off. The shrink film is pulled out by the movement of the movable nipper, and the hot melt adhesive is sprayed on the film for a predetermined length.

FIG. 7 is a diagram showing a state after completion of film drawing from the state of FIG. 6;
FIG. 10 is a side view of a state in which the guide roller is moved closer to the opening top plate side of the cardboard box while the cardboard box is pressed by the pressing plate.

FIG. 8 is a side view showing a state in which the cardboard box is pressed by the holding plate as shown in FIG. 7, and then the pushing cylinder is driven, the pushing plate is pushed into the cardboard box, and the film is adhered in the cardboard box.

FIG. 9 is a side view showing a state in which the film nip on the leading end side of the drawer is released and the upstream end of the film withdrawal is cut by a cutter after completion of the film mounting by pushing the push plate.

FIG. 10 shows a state in which after the upstream end of the film drawer is cut, the push plate is raised to the standby position, and the upper film hanging outside the top plate flap is attached to the upper surface of the cardboard box by blowing air from the film blowing pipe. FIG.

FIG. 11 is a side view of a state where a packaging box having a small outer dimension is supplied.

12 is a view showing a state where the packaging box is lifted up to a predetermined position in the height and width directions in the state of FIG. 11;

FIG. 13 is a plan view showing a positional relationship between a fixed and a movable nipper before the start of film drawing.

FIG. 14 is a plan view showing a state in which a hot melt adhesive is sprayed at the same time as the start of film drawing.

FIG. 15 is a plan view showing a state in which hot-melt-adhesive spraying is continued while the film is further pulled out from FIG. 14;

FIG. 16 is a side view showing an example of a heat shrink unit.

17 is a cross-sectional view showing a state in which an article to be packaged is filled in the packaging box of FIG. 2;

FIG. 18 is a cross-sectional view showing a state in which the film is covered over the entire packaged article with the film end portions overlapping.

FIGS. 19A and 19B show another embodiment of the film fixed in the packaging box. FIG. 19A shows a state in which the film is adhered at a position shifted to one side of the inner bottom surface and at several places on the side wall closer to the shifted side to cause heat shrinkage. (B) is a cross-sectional view of a state where the film is bonded and thermally shrunk at several locations on the inner bottom surface, and (c) is a cross-sectional view of a state where the film is bonded and thermally shrunk at several locations on the opposite side wall. is there.

[Description of Signs] 10 Packaging box (cardboard box) 11 Bottom plate of packaging box 12 Inner bottom surface of bottom plate 13 Side plate of packaging box 14 Inner surface of sidewall of packaging box 15 Top flap of packaging box 16 Opening 17 Adhesive 18 Packaged product DESCRIPTION OF SYMBOLS 19 Package body 20 Film mounting unit 21 Frame 22 Film 22a Film roll 23 Supply conveyor (Round belt drive type roller conveyor) 24 Guide conveyor 26 Loading positioning stopper 27 Unwinding part 28 Drive roller 29 Film guide roll 30 Adhesive application means ( Hot melt applicator)
31 Hose 32 Nozzle head (spray gun) 33 Cutter
34 Receiving Plate 35 Film Pull-Out Mechanism 36 Timing Belt 37 Timing Belt Drive 38 Fixed Nipper 39 Movable Nipper 39a Movable Nipper Support Bar 40 Pushing Means 41 Pushing Cylinder 42 Pushing Plate (with Air Pad) 43 Sidewall Pushing Plate 44 Lateral Pushing Link (Toggle) Link) 45 Spring / cylinder for side pushing 46 Height adjusting plate 47 Height adjusting cylinder 48 Width adjusting plate 49 Gad roller 50 Film spraying pipe 51 Film spraying cylinder 52 Width adjusting cylinder 53 Tension roller 54 Holding plate 55 Operation panel 60 Heat shrink unit 61 Base 62 Heat-resistant belt conveyor 63 Belt drive unit 64 Operation panel 65 Shrink tunnel unit 66 Heater 67 Fan motor

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akira Niwa 107 Fukizen, Makijima-cho, Uji-city, Kyoto F-term in Nissan Kikko Co., Ltd. (Reference) 3E075 BA22 BB12 CA02 CA10 DA03 DA04 DA14 DA15 DD02 DD08 DD24 DD32 GA01 GA04

Claims (5)

[Claims] 1. A shrink film having a large number of pin points or dotted lines or a spirally coated adhesive applied to a predetermined position on a back surface thereof is inserted through an opening of a packaging box in a state where a top plate flap is opened, and a bottom surface inside the packaging box and / or Alternatively, a package without a cushioning material, in which a packaged product adhered to a part of the side wall inner surface and stored on the non-adhesive surface side of the film adhered in the box is integrally restrained in the packaging box by heat shrinkage of the film. . 2. A roll-shaped shrink film supported so as to be able to be unwound, and a packaging box with a top plate flap opened,
After being transferred to the mounting position of the film drawn from the roll-shaped shrink film in a state inclined in a vertical plane perpendicular to the running direction, a supply conveyor for sending out the machine, and provided at the film mounting position, A film pull-out mechanism that pulls out a film corresponding to a substantially cross-sectional length of the packaging box so as to cover the opening of the packaging box, and a bonding portion of the back surface of the shrink film being pulled out to the inner bottom surface and / or the side wall inner surface of the packaging box. At the position, an adhesive applying means for applying an adhesive or an elastic adhesive in a pinpoint or dotted line or spiral shape, or a means for intermittently applying an adhesive tape having a buffer function, and pressing an intermediate portion of the drawn film. The adhesive-coated part on the back of the film is brought into contact with the inner bottom surface and / or the inner surface of the side wall of the packaging box by pushing the film into the packaging box with a plate. And pushing means for a film cutter for cutting the lead upstream end of the mounted film into the packaging box, the film loading device comprising a. 3. When the shrink film is inserted into the packaging box in the opened state of the top plate flap, the shrink film advances from the upper edge of the opened top plate and the adhesive applied portion of the shrink film rubs against the inner surface of the packaging box. 3. The film mounting apparatus according to claim 2, further comprising a guide roller for holding the film mounting member. 4. The packaging box with the top plate flap opened is transferred into a shrink film mounting machine in a state where the packaging box is tilted to a vertical plane perpendicular to the running direction, and after positioning of the packaging box is stopped at the film mounting position,
While pulling out the shrink film that covers the opening portion of the packaging box in the inclined state and that corresponds to approximately the cross-sectional length of the packaging box, apply an adhesive in a pinpoint shape, a linear shape, or a spiral shape on the back surface of the film, and pull out the film. By pressing the intermediate portion of the film into the packaging box with a push plate, the adhesive-applied portion on the back surface of the film is bonded to a part of the inner bottom surface and / or the inner surface of the side wall of the packaging box, and is mounted in the packaging box. Cut the upstream end of the drawn film and carry it out of the film mounting machine, after loading the packaged product or the packaged product on the non-adhered surface of the bonded film, wrap it lightly and send it to the heat shrink unit,
A film bonding method for a cushion-less package, wherein the film is thermally shrunk to constrain an article to be packaged integrally in a packaging box. 5. When the size of the packaging box in the opened state of the top plate flap is different, the width, height, and length of the packaging box are adjusted by means of an air cylinder, a motor, a ball screw, or the like. 5. The film bonding method according to claim 4, wherein the shrink film is inserted after setting the packaging box at a predetermined position.