JP2002019714A - Method for packaging triangular-prism-formed object to be packaged - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for packaging a triangular-prism-formed object to be packaged wherein a material film roll can be used, high-speed automatic packaging can be done by a packaging film sheet cut into a required octagonal form, and tight packaging can be realized. SOLUTION: After the packaging film sheet S1 of a required octagonal form is folded into a channel shape so that a folded form covering the longest first rectangular surface W1 and triangular surfaces W2 and W3 on both sides of the triangular-prism-formed object W is interposed between a pair of side face film pressing plates 25 and 26, one of film peripheries S11 and the other periphery S12 are used to doubly cover the second rectangular surface W2 and the third rectangular surface W3 and laterally feed toward the triangular surface W3 covered by the other film periphery S12. The film peripheries S11 and S12 are pressed not to open by a pair of film pressing guides 27a and 27b, and heat seals 12a and 12b are applied on an end rim of the outer film periphery S12 to the inner film periphery S11. In addition, heat seals 13a, 13b and 13c are applied to the vicinity of the object W of respective fins 9, 10 and 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a packaging film sheet obtained by cutting a continuous film fed from a raw film roll into required octagons, and bending the packaging film sheet into a channel shape. Then, cover the longest first rectangular surface and the triangular surfaces on both sides of the triangular prism-shaped packaged object, fold over the second and third rectangles of the packaged object with one film peripheral portion, and then traverse. , The second and third rectangular surfaces of the object to be packaged can be double-folded by the peripheral portion of the film on the other side, thereby enabling extremely high-speed automatic packaging and realizing tight packaging.
The present invention relates to a method for packing a triangular prism-shaped article to be packed such as a sandwich.

[0002]

2. Description of the Related Art Conventionally, a package (such as a sandwich or pancake) having a half-body shape (triangular prism shape) obtained by cutting a rectangular parallelepiped in a plane passing through its diagonal side is disclosed in, for example, Japanese Patent Application Laid-Open No. 07-195.
A flat-shaped sandwich packaging bag as shown in the drawing of 834 is widely used, the package W is accommodated in the sandwich packaging bag, the edges of the opening are folded from all sides, and closed with an adhesive tape. So far, most of the packaging has been hand-packed so far, and the edges of the opening are folded from all sides and closed with adhesive tape, so the sealing is strictly incomplete and tight packaging is not possible . On the other hand, there has been proposed a bag-feeding and packaging machine in which a sandwich packaging bag is opened to accommodate a packaged object, an edge of an opening is folded from all sides, and closed with an adhesive tape, but has not been put to practical use.

On the other hand, there is a demand for packaging a sandwich from a packaging film sheet. Examples of such inventions include JP-A-5-221459, JP-A-6-345047, JP-A-7-277362, and JP-A-7-277362. -291348, JP-A-8-091332, and JP-A-10-236524.

[0004] Japanese Patent Application Laid-Open Nos. 5-221459 and 7-277362 are for packaging a sandwich so as to form a sandwich packaging bag. The edges of the opening are folded from all sides and closed with an adhesive tape. , Tight packaging is not possible. Japanese Patent Application Laid-Open No. 7-277362 discloses that a continuous film is unwound from a material roll and cut into a sheet to form a sandwich packaging bag. The packaged object is accommodated, the edge of the opening is folded from all sides, and an adhesive tape is used. A bag making and packaging machine that closes is proposed, but the back plate is closely attached to the inclined surface of the sandwich, then the film peripheral parts on both sides are folded at the center of the width, heat sealed and the back plate is pulled out, so the back plate is sandwiched It is not hygienic that it adheres tightly, and because it is a thing that pulls out the back plate, it can not be tightly packaged, and in addition, the number of processes is large and packaging takes too much time , Not practical.
Japanese Patent Application Laid-Open No. H08-091332 is substantially the same technology as Japanese Patent Application Laid-Open No. H7-277362. In JP-A-6-345047 and JP-A-7-291348, the surplus portion is folded after being wrapped around the body, and the surplus portion of the film is too large.

[0005]

SUMMARY OF THE INVENTION Japanese Patent Application Laid-Open No. 10-236524 discloses
This is a packaging form that is not particular about creating the form of a sandwich packaging bag as described in the above-mentioned JP-A-5-221459 and JP-A-7-277362, and is the packaging form closest to the packaging film sheet of the present invention. However, this packaging form has the following disadvantages. 1 and 2 of JP-A-10-236524
Indicates an incorrect packaging form (a drawing based on incorrect recognition of the invention). When drawn correctly, the fins
Since two small triangles are arranged side by side, the dimensions that can be heat-sealed to the valleys of the two small triangles cannot be sufficiently obtained, resulting in incomplete sealing. Specifically, in the sealing order in which the first seal portions 12, 13, 14 are provided, and then the fins 10, 11 are folded to provide the second seal portions 15, 16,
The second seal portion 15 cannot be stably provided, and may be opened. The second seal portion 16 heat seals the four film stacks, and there is a high probability that the heat seal will be incomplete. The peripheral portions of the film on both sides covering the two rectangular inclined surfaces of the packaged object are overlapped by the heat sealing width at the center of the width of the inclined surface and the entire length is heat-sealed, but the width of the packaged object W is large. In some cases, the overlapping margin of the heat seal width cannot be secured, and the sealed packaging cannot be realized.
Also, when the width of the packaged object is small, the overlap of the heat seal width is too large, and the edge of the film overlapping on the outside is pierced, and the packaging looks coarse. Further, the film peripheral portions on both sides of the packaged object W which cover the two rectangular inclined surfaces may be point-sealed at the center of the width of the inclined surface by the heat sealing width and spaced apart from each other. Is
This is contrary to the object of the invention to ensure sufficient hermeticity, and the packaging looks coarse. Further, FIG.
The extra hexagons on both sides shown in Fig. 2 are necessary to form the fins, which reduces the edge length of the fins. There is a problem that it is too uneconomical and difficult to remove. In addition, since there is no surplus portion, even if the packaged object is slightly displaced with respect to the packaging film sheet, the packaging may be incomplete. Furthermore, when performing automatic packaging at a high speed by a machine, the peripheral portions of the film on both sides covering the two rectangular inclined surfaces of the packaged object are short, and the peripheral portions of the film on both sides are heat-sealed at the center of the width of the inclined surface. In this configuration, the entire length is heat-sealed, so that it is necessary to press the sheet seal bar between the folded plates in the separated butted state, which requires a long operation time mechanically. or,
It is impossible to fold the two peripheral surfaces of the film on the two rectangular inclined surfaces so as to cover the peripheral portion of the film on one side and to move the film in the same direction as it is.

According to the present invention, a packaging film sheet obtained by cutting a continuous film fed from a raw film roll into a required octagon can be employed, and the packaging film sheet is bent into a channel shape to form a triangular prism. Covering the longest first rectangular surface and the triangular surfaces on both sides of the packaged object W,
When the wrapping is performed to cover the second and third rectangles of the packaged object by one of the film peripheral portions and then traversed, the second and third rectangular surfaces of the packaged object are doubled by the other film peripheral portion. It is an object of the present invention to provide a method of packaging a triangular prism-shaped article to be packaged such as a sandwich, which can be folded and covered at a very high speed and can perform extremely high-speed automatic packaging and realize tight packaging.

[0007]

The above objects can be achieved by the following inventions. The first invention of the present application is a folding form in which a required octagonal packaging film sheet S1 is bent into a channel shape to cover the longest first rectangular surface W1 and the triangular surfaces W2, W3 on both sides of the triangular prism-shaped packaged object W. After being sandwiched between the pair of side film holding plates 25 and 26, the packaged object is provided on the side of the one side film holding plate 25 and passes through the opening 25a provided in the one side film holding plate 25. The first folding plate 34 that can move so as to slide on the second rectangular surface W2 and the third rectangular surface W3 of the W
Is moved so as to cover the one triangular surface W2 and extend to the one film peripheral portion S11 extending outward to cover halfway of the second rectangular surface W2 and the third rectangular surface W3. Accordingly, the one film peripheral portion S11 covers the second rectangular surface W2 and the third rectangular surface W3 and extends outward from three ridge lines connecting the vertices of the triangular surfaces W2 and W3 on both sides of the packaged object W. The three fin halves 9a, 10a and 11a are formed, and then the wrapping object W is provided on the side of the other side film holding plate 26 through the opening 26b provided on the other side film holding plate 26. A second foldable plate 36a, 36b that can move so as to slide on the second rectangular surface W2 and the third rectangular surface W3 is covered with the other triangular surface W3 of the packaged object W and the other film extending outward. The second rectangular surface W2 and the third rectangular surface protruding into the peripheral portion S12 3 so that one film peripheral portion S11 overlaps the other film peripheral portion S12 and the three vertices of the triangular surfaces W2 and W3 on both sides of the packaged object W are connected. Three fin halves 9b, 10b, 11b extending outward from the ridge line, respectively, are formed. Then, the transverse feed plate 35 provided on the side of the one side film holding plate 25 is attached to the one side film holding plate 25. It moves through the opening 25a provided, pushes the one triangular surface W2 of the packaged object W, and pushes the packaged object W until it slides under the second folding plates 36a and 36b and passes therethrough. After that, the film peripheral portion S that double covers the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W.
11, S12 is held by a pair of film holding guides 27a, 27b so as not to be opened, and a heat sealer is attached to the edge of the outer film peripheral portion S12 which covers the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W. 28a, 28b are pressed to apply heat seals 12a, 12b to the edge of the outer film peripheral portion S12 with respect to the inner film peripheral portion S11.
It is intended to provide a method for packing triangular prism-shaped objects to be packaged, wherein heat seals 13a, 13b, and 13c are provided in the vicinity of the objects W to be packaged. The second invention of the present application is a folding form in which the required octagonal packaging film sheet S1 is bent into a channel shape to cover the longest first rectangular surface W1 and the triangular surfaces W2 and W3 on both sides of the triangular prism-shaped packaged object W. After being sandwiched between the pair of side film holding plates 25 and 26, the packaged object is provided on the side of the one side film holding plate 25 and passes through the opening 25a provided in the one side film holding plate 25. The first folding plate 34 that can move so as to slide on the second rectangular surface W2 and the third rectangular surface W3 of the W
2 is moved so as to cover halfway or almost the entire surface of the second rectangular surface W2 and the third rectangular surface W3 by protruding into the one film peripheral portion S11 extending outward and covering the second rectangular surface W2. Three fin halves covering the second rectangular surface W2 and the third rectangular surface W3 with the film peripheral portion S11 and extending outward from three ridge lines connecting the vertices of the triangular surfaces W2 and W3 on both sides of the packaged object W. 9a, 10a, and 11a are formed, and then the traverse plate 35 provided on the side of the one side film holding plate 25 is moved through the opening 25a provided on the one side film holding plate 25 of the packaged object W. To be packaged W
Pressing the one triangular surface W2, the to-be-packaged object W passes through the fold hole 26a provided in the other side film pressing plate 26 so that the one film peripheral portion S11 overlaps the other film peripheral portion S12. , To be packaged
Three fin halves 9b, 10b, 11 extending outward from three ridges connecting the vertices of the triangular faces W2, W3 on both sides of the fins 9b, 10b, 11 respectively.
b, and after passing, the film peripheral portions S11 and S12 which double cover the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W are held by a pair of film holding guides 27a and 27b so as not to be opened. The heat sealers 28a and 28b are pressed against the edges of the outer film peripheral portion S12 covering the first rectangular surface W1 and the second rectangular surface of the packaged object W, and the outer film peripheral portion S12 is pressed.
Heat seals 12a, 12b are applied to the inner peripheral portion S11 of the film, and heat seals 13a, 13b, 13c are applied to the fins 9, 10, 11 in the vicinity of the object W to be packaged. The present invention provides a method for packaging a triangular prism-shaped article to be packed. The third invention of the present application relates to a longest first rectangular surface W1 and triangular surfaces W2, W3 on both sides of a triangular prism-shaped packaged object W by bending a required octagonal packaging film sheet S1 into a channel shape.
, And then one film peripheral portion S
11 and the other film peripheral portion S12 are laterally fed to the side of the triangular surface W3 covered by the other film peripheral portion S12 by overlapping the second rectangular surface W2 and the third rectangular surface W3 doubly. The portions S11 and S12 are pressed by a pair of film pressing guides 27a and 27b so as not to be opened, and the edges of the outer film peripheral portion S12 are heat-sealed to the inner film peripheral portion S11. Heat seals 13a, 13b, 13
The present invention provides a method for packaging a triangular prism-shaped article to be packaged, wherein c is applied.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A method for packing a triangular prism-shaped article to be packaged according to the first invention of the present application will be described with reference to FIGS. The method for packaging a triangular prism-shaped article to be packaged according to the present invention uses a substantially octagonal packaging film sheet S1 shown in FIG. Packaging film sheet is to ensure easy opening after packaging
It is sufficient that a notch for starting the tearing is provided, but the packaging film sheet S1 of the triangular prism-shaped object to be packaged such as a sandwich shown in FIGS. 1 and 4 (a) is a single film or a laminated film of a biaxially stretched film. A packaging film sheet F1 having an octagonal overall planar shape, two cut tapes T1 and T2 stuck and welded to the packaging film sheet F1, and two cut tapes provided on the packaging film sheet F1. The tapes T1 and T2 are provided with notches 8, 8 for tearing the packaging film sheet F1, which is the starting point of tearing and tearing the ends of the tapes T1 and T2, to unwrap the packaging. The octagonal sheet film F1 has a center on which the first rectangular surface W1 which is a rectangular surface corresponding to the longest side of the triangular surface of the packaged object W such as a triangular sandwich is occupied so as to occupy the center of the sheet. The rectangular portion 1 is secured and connected to the long sides of the central rectangular portion 1 on both sides of the film on both sides of the two straight lines passing through the long sides of the central rectangular portion 1 on both sides of the packaged object W. And a pair of triangular surface covering portions 2, 3 for covering the triangular surfaces W2, W3 on both sides of the packaged object W, and the triangular surface covering portions 2, 3, respectively. The second rectangular surface W4 and the third rectangular surface W5 connected to two sides apart from the central rectangular portion 1 and correspond to the remaining two sides except the longest side of the triangular surface of the packaged object W, respectively. A rectangular surface covering portion 4a having a substantially corresponding shape,
4b, 5a, 5b, and triangular surplus portions 6a, 6 extending between the two rectangular surface covering portions facing the respective triangular surface covering portions.
b is secured, and a trapezoidal surplus portion 7a connected to one short side of the central rectangular portion 1 and extending between the rectangular surface covering portions 4a, 5a on both sides of the short side is secured, A trapezoidal surplus portion 7b connected to the other short side of the central rectangular portion 1 and extending between the rectangular surface covering portions 4b and 5b on both sides of the short side is secured. The two cut tapes T1 and T2 are close to each other at the center of the edge of the surplus portion 7a of one trapezoid, are widely separated from one another by the full width in the central rectangular portion 1, and are at the center of the edge of the surplus portion 7b of the other trapezoid. They are welded in a curved shape close to each other. The cuts 8, 8 are provided in the trapezoidal surplus portion 7a with the ends of the two cut tapes T1, T2 sandwiched therebetween. The packaging film sheet S1 is a single film or a laminated film of a biaxially stretched film, and has a thickness of 20
Both surfaces of about μ25 μm have heat sealing properties. As the cut tapes T1 and T2, a uniaxially stretched film having a thickness of about 25 to 40 μm is used. The relational dimensions in FIG. 1 are as follows: A2 is equal to the thickness of the article W to be packaged; B2 is A2- (1 to 5 mm);
2 is B2 × 0.7.

[0009] With regard to the packaging film sheet S1 of a triangular prism-shaped article to be packaged such as a sandwich shown in Fig. 1 and Fig. 4 (a), in practice, two continuous cut tapes are pasted in a continuous film in a meandering manner. And then cut into octagons with a die cut roll or the like. The cut mark m to be printed on the continuous film is preferably provided in the middle of the cut length of the packaging film sheet S1. This is because, when the cutting is performed with the cut mark m and the cutting position coincident with each other, the continuous film is removed at the cut portions of the isosceles triangles on both side edges of the continuous film, and the subsequent positioning of the packaging film sheet S1 is performed. This is because the cut mark m cannot be used any more. However, the cut mark m may or may not be present.

A brief description will be given of a method of sticking and welding two continuous cut tapes in a continuous biaxially stretched film by periodically meandering and welding. A continuous biaxially stretched film and two continuous cut tapes for identifying the shape to tear the film after packaging are brought into close contact with each other and guided to be welded by a heat seal roll. It is wound around a floating roller for the cut tape guide arranged, and a cylindrical cam having an endless cam groove corresponding to a unit meandering curve for periodically meandering and inserting the cut tape is rotated to move each of the cut tape guides. By reciprocating the roll in the axial direction (the above configuration is not shown), as shown in FIG. 1, two continuous cut tapes T1 and T2 are cut into front and rear cut marks m printed on a continuous film. , m, it is stuck so as to be close to the center of the film width, and at the position corresponding to each cut mark m, the long side of the central rectangular portion 1 Paste so that it is almost the same as

Next, a method for packaging a triangular prism-shaped article to be packaged according to an embodiment common to the first invention and the second invention of the present application will be described with reference to FIG. The case of using and packaging will be described with reference to FIGS. 2, 3, 4 (a) to 4 (d) and FIGS. 5, 6 (a) to 6 (c). Briefly, the film F is intermittently fed out from the raw film roll R, cut by the die roll cut roll 38, intermittently conveyed by the belt conveyor 39, and the triangular prism-shaped articles to be packaged W are placed thereon. Subsequently, the packaging film sheet S on which the article W to be packaged is placed by the belt conveyor 39.
1 is sucked, intermittently conveyed, and the film peripheral portions S11 and S12 on both sides of the packaging film sheet S1 are folded in a channel shape at a position one step before the packaging portion by the side film holding plates 25, 26a and 26b facing each other. At the position moved to the position, the first folding plates 34, 34 are pushed into the one film peripheral portion S11 which extends outward so as to cover the one triangular surface W2 of the article W to be packaged. The second rectangular surface W at the film peripheral portion S11
2 and the third rectangular surface W3, and then the second folding plate
36a and 36b are inserted into the other film peripheral portion S12 which extends outward so as to cover the other triangular surface W3 of the packaged object W, so that the other film peripheral portion S12 double overlaps. Then, the transverse feed plate 35 is moved to push the one triangular surface W2 of the packaged object W, and the packaged object W is moved to the second folding plate 36.
a, 36b is pushed until it slides underneath, and after passing, a pair of film peripheral portions S11 and S12 that double cover the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W are paired. Pressing the film holding guides 27a and 27b so that they do not open,
The heat sealers 28a and 28b are pressed against the edges of the outer film peripheral portion S12 covering the second rectangular surface W2 and the third rectangular surface W3 so that the edge of the outer film peripheral portion S12 becomes the inner film peripheral portion S11. Heat seals 12a and 12b are applied to the fins 9, 10 and 11, and heat seals 13a, 13b and 13c are applied near the object W to be packaged. , 11 are bent and point seals 14a, 14b are provided so as not to open as they are, and the packaging of the article to be packaged, such as a sandwich, is completed.

The details will be described below. As shown in FIG. 2, a film F in which two continuous cut tapes are wound in a meandering manner from a raw film roll R is fed out by intermittent rotation of a film feeding roll 37, and the film F fed out at an intermittent stop. Is cut by a die roll cut roll 38 to obtain a required octagonal packaging film sheet S1 shown in FIG. Next, the required octagonal packaging film sheet S1 shown in FIG. 1 is transferred to the belt conveyor 3 having a suction function by suction boxes 39b and 39c on the lower side of the belt 39a.
9 and intermittently convey it, and as shown in FIG. 3 and FIG.
Place on the center rectangular part of 1. The suction box 39b is configured to always perform suction, and the suction box 39c is configured to stop the temporary suction during the horizontal feeding. Subsequently, the packaging film sheet S1 on which the article to be packaged W is placed is sucked by the belt conveyor 39 and is intermittently conveyed. Then, FIGS. 2, 3, and 4
(b), As shown in FIGS. 5 and 6 (a), a pair of side film pressing plates 25 and 26 rising between the belt conveyor 39 and the apron tails 40a and 40b on both sides, one step before the packaging unit. At the position, the film peripheral portions S11 and S12 on both sides of the packaging film sheet S1 are bent into a channel shape to cover the longest first rectangular surface W1 and the triangular surfaces W2 and W3 on both sides of the triangular prism-shaped packaged object W. Then, the channel-shaped fold is completed at the position moved to the packaging portion, and is positioned between the side film holding plates 25 and 26. Next, as shown in FIGS. 3, 4 (c), 5 and 6 (b), the first folding plates 34, 34
Into the one film peripheral portion S11 that extends outward covering the one triangular surface W2 of the article to be packaged W and covers the second rectangular surface W2 and the third rectangular surface W3 halfway. The one film peripheral portion S
The three fin halves 9 which cover the second rectangular surface W2 and the third rectangular surface W3 at 11 and extend outward from three ridges connecting the vertices of the triangular surfaces W2 and W3 on both sides of the packaged object W respectively.
a, 10a, 11a, and then provided on the side of the other side film holding plate 26, the other side film holding plate
The second folding plates 36a and 36b that can move so as to slide on the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W through the opening 26a provided in the The other film peripheral portion S1 extending outward covering the surface W3
2 and a second rectangular surface W2 and a third rectangular surface W3.
By moving so as to cover halfway, the one film peripheral portion S11 overlaps the other film peripheral portion S12. Next, as shown in FIGS. 4 (d) and 6 (c), the triangular transverse feed plate 35 which stands by in the triangular opening 25a opened in the one side film pressing plate 25 is horizontally moved to be packaged. After pushing the one triangular surface W2 of the article W, the article to be packaged W slides under the second folding plates 36a and 36b, and is further pushed until passing through the relay guides 41a and 41b. Presses the film peripheral portions S11 and S12, which cover the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W, so as not to be opened by the pair of film pressing guides 27a and 27b, and The heat sealers 28a and 28b are pressed against the edges of the outer film peripheral portion S12 covering the second rectangular surface W2 and the third rectangular surface W3, and the edges of the outer film peripheral portion S12 are pressed against the inner film peripheral portion S11. Heat seal 12
a, 12b (see FIG. 4 (d)) and each fin 9, 10, 11
The heat sealers 29a, 29b, 30, 31 are pressed against the object W to be heat-sealed 13a, 13b, 13c, and the fins 9, 11 are successively moved by the fin bending guides 32, 42 as shown in FIG. The heat sealers 43 and 44 are pressed against the rectangular surface covering portion 5b by bending the fins 9 and 11 so that the fins 9 and 11 are not opened as they are, and the point seals 14a and 14b are applied (see FIG. 4 (e)).
This completes the packaging of the article to be packaged, such as a sandwich. The package P is transported by the conveyor 45.

Next, a method for packaging a triangular prism-shaped packaged object according to an embodiment common to the first invention and the third invention of the present application will be described with reference to the required octagonal packaging film sheet S1 having the above configuration shown in FIG. Fig. 4 (a) ~
(e), FIG. 7 and FIGS. 8 (a) to 8 (d). Briefly, as shown in FIGS. 4 (a) and 7, a triangular prism-shaped article W is placed on a required octagonal packaging film sheet S1.
Next, as shown in FIGS. 4 (b) and 8 (b), the packaging film sheet S1 is lowered so as to be sandwiched between the pair of side film pressing plates 25 and 26, and the packaging film sheet S1 is bent into a channel shape to form a triangular prism-shaped cover. The longest first rectangular surface W1 of the package W and the triangular surfaces W2 and W3 on both sides are folded so as to cover the package W. Then, FIGS.
As shown in the figure, the first folding plate 34 is connected to one of the film peripheral portions S.
11 and overlaps the second rectangular surface W2 and the third rectangular surface W3 at the one film peripheral portion S11, and the first folding plate 34 (not separated left and right in this embodiment). The triangular surface W2 of the packaged object W is traversed by the traversing plate 35 at a speed synchronized with the accompanying movement from the midway between the side film pressing plates 25 and 26 to the stop movement to approach the side film pressing plate 26 and stopped. As shown in FIG. 8 (d), it passed through the fold hole 26b provided in the side film pressing plate 26 and was overlapped with the second rectangular surface W2 and the third rectangular surface W3 as shown in FIG. 4 (d). One film peripheral portion S11 overlaps the other film peripheral portion S12, and after passing, as shown in FIG. 8 (d), the film peripheral portions S11, S12
Of the film holding guides 27a and 27b (reference numeral 27b is
(See FIG. 2), the edges of the outer film peripheral portion S12 are heat-sealed 12a and 12b to the inner film peripheral portion S11.
Heat seals 13a, 13b, and 13c are provided in the vicinity of the articles W to be packaged 10 and 11, and the fins 9 and 11 are bent into the rectangular surface covering portion 5b so that the fins 9 and 11 are folded so that the point seals 14a and 14b are not opened as they are. To complete the packaging of the article to be packaged, such as a sandwich.

The details will be described below. As shown in FIGS. 4 (a), 7 and 8 (a), the raising and lowering plate 21 is stopped so as to be flush with the center of the table 20 so as to be flush with the center of the table 20. The wrapping film sheet S1 is placed at a fixed position by a wrapping film sheet feeding means (not shown), and the wrapping film sheet S1 is weakly sucked by a vacuum box 22 attached to the lower surface of the table 20.
Is positioned so as not to fly by the wind, and the center rectangular portion 1 of the packaging film sheet S1 is made to correspond to the center gap of the table 20, and the triangular surfaces on both sides of the packaged object W conveyed to the predetermined position by the conveyor 23. The angled plate 24a forming the holding hand 24 holding the W2 and W3 is brought into close contact with the second rectangular surface W4 and the third rectangular surface W5, and then held by the holding plates 24b and 24b forming the holding hand 24. And then transport it, as shown in FIG.
As shown in (1), the first rectangular surface W1 of the packaged object W is placed on the central rectangular portion 1 of the packaging film sheet S1, and then the sandwiching of the packaged object W is released. Next, as shown in FIG. 2 (b), the elevating plate 21 and the angled plate 24a are integrally moved down the triangular surfaces W2, W3 on both sides of the packaged object W between the side film pressing plates 25, 26 to lower the lower table. 33, the height of the lifting plate 21 is adjusted to a stop, and the angle plate 24a is immediately lifted and returned. In this operation process, as shown in FIG. 4 (b), both sides of the central rectangular portion 1 of the packaging film sheet S1 are removed. From the two straight lines passing through the long sides, it is folded up at right angles to the peripheral portions of the film on both sides, and the packaged object W is formed by the triangular surface covering portions 2 and 3 of the packaging film sheet S1 shown in FIG.
Cover the triangular planes W2 and W3 on both sides of. That is, the required octagonal packaging film sheet S1 is bent into a channel shape to cover the longest first rectangular surface W1 and the triangular surfaces W2 and W3 on both sides of the triangular prism-shaped packaged object W. It is made to be sandwiched between the plates 25 and 26. Then
As shown in FIGS. 4 (c), 7 and 8 (c), the first folding plate 34 having a mountain-shaped cross section is connected to the second and third rectangular surfaces W4,
A film peripheral portion S11 which is horizontally moved closely along W5 and folded up so as to cover the triangular surface W2 of the packaged object W.
Is horizontally folded along the second and third rectangular surfaces W4, W5 of the packaged object W, and the packaged product W is formed by the rectangular surface covering portions 4a, 4b of the packaging film sheet S1 shown in FIG. The second and third rectangular surfaces W4 and W5 are folded so as to overlap each other, and the film surplus portions 6a, 7a, 7a, 7a, extending outward from three ridge lines connecting the vertices of the triangles on both sides of the packaged object W, respectively. Three fin halves 9a, 10 consisting of 7b
a and 11a are formed respectively. Next, FIG. 4 (d) and FIG.
As shown in (d), the triangular traversing plate 35 positioned in the triangular opening 25a opened in the side film holding plate 25 is horizontally moved to push the triangular surface W2 of the packaged object W to form the package. The object W is transferred from the elevating plate 21 onto the lower table 33 and passed through a substantially triangular fold hole 26b formed in the side film holding plate 26, and further, the film holding guide 2
7a, 27b, the second and third rectangular surfaces W4, W
5 is pushed back to the position where it is pressed, and the triangular transverse feed plate 35 is returned and moved, whereby the folding hole 26b produces a folding action, and is folded up so as to cover the triangular surface W3 of the packaged object W. As shown in FIG. 4 (d), the peripheral portion S12 is horizontally folded along the second and third rectangular surfaces W4 and W5 of the article to be packaged W, thereby forming the packaging film sheet shown in FIG. 2 (a). The article W to be packaged is covered by the rectangular surface covering portions 5a and 5b of S1.
The second and third rectangular surfaces W4 and W5 are folded in a double overlapping state, and the film surplus portions 6b extending outward from three ridge lines connecting the vertices of the triangles on both sides of the packaged object W, respectively. Fin halves 9b, 10b, 11b, consisting of fins 7a, 7b, respectively. The above-mentioned lateral feeding is performed in a state where the outer rectangular surface covering portions 5a and 5b overlapping the second and third rectangular surfaces W4 and W5 of the packaged object W are in close contact with the inner rectangular surface covering portions 4a and 4b. Therefore, even if the first folding plate 34 relatively moves and returns, the inner rectangular surface covering portions 4a and 4b do not shift and return. When the triangular lateral feed plate 35 is horizontally moved through the triangular opening 25a to push the triangular surface W2 of the packaged object W, the packaged object W is formed in a substantially triangular shape provided on the side film pressing plate 26. When the horizontal movement of the triangular transverse feed plate 35 is temporarily stopped at the time of insertion into the folding hole 26a, the rectangular surface covering portions 5a and 5b of the packaging film sheet S1 have already Since the three rectangular surfaces W4 and W5 are double covered, the portions of the rectangular surface covering portions 5a and 5b from the bending lines are heat-sealed to the rectangular surface covering portions 4a and 4b of the packaging film sheet S1. Subsequently, the triangular transverse feed plate 35 is horizontally moved to move the triangular surface W2 of the packaged object W.
To push. In this way, when the angled folding plate 34 is relatively returned from the second and third rectangular surfaces W4 and W5 of the packaged object W, the rectangular surface covering portions 4a and 4b are dragged together. This is preferable because there is no deviation from the rectangular planes W4 and W5. The rectangular surface covering portions 4a, 4b, 5a, 5b of the packaging film sheet S1 that have passed through the folding holes 26b are pressed by a pair of film pressing guides 27a, 27b, as shown in FIG.
As shown in FIG. 3 and FIG.
a, 28b (see FIG. 5) move toward the second and third rectangular surfaces W4, W5 of the packaged object W, and the ends of the rectangular surface covering portions 5a, 5b overlapping on the outside shown in FIG. Heat sealing 12a, 12b is applied to the one rectangular surface covering portions 4a, 4b whose edges overlap inside. When the above-described packaging process is repeated, the package in the packaging form shown in FIG. 4D previously packaged by the film holding guides 27a and 27b is packaged in the packaging form shown in FIG. Is guided in a state where it is pushed by. In the process of moving the package in the package form shown in FIG. 4D while being pressed by the film pressing guides 27a and 27b, FIG.
As shown in FIG. 5, heat sealers 29a, 29b, 30, 31
4), heat seals 13a, 13b, and 13c are applied near the ridges connecting the vertices of the triangular surfaces W2 and W3 on both sides of the packaged object W as shown in FIG. By folding the fins 9 and 11 on the rectangular surface covering portion 5b and applying the point seals 14a and 14b so that the fins 9 and 11 do not open as they are (see FIG. 5), the packaging of the article to be packaged such as a sandwich is completed. The package P is transported by the conveyor 45 (see FIG. 6C).

The packaging film sheet of the article to be packaged such as a sandwich according to the present invention comprises: (1) a film is unwound from an original film roll of a biaxially stretched film, and two continuous cut tapes T1 and T2 are formed in a predetermined pattern. A raw film roll formed by bending, sticking, welding, and winding into a packaging machine, cutting it into an octagon immediately before packaging, and providing cuts 8, 8 to supply to a packaging position; (2) The film is unwound from a raw film roll of a biaxially stretched film, and two continuous cut tapes T1 and T2 are bent and adhered in a predetermined pattern, welded, and cut into an octagon without winding. In addition, in the case where the cuts 8, 8 are provided and laminated, and this is stored in the sheet stocker of the packaging machine, any of the above methods may be used.

The packaging form shown in FIG. 9A uses the packaging film sheet S1 of the article to be packaged such as the sandwich shown in FIG. 1 and is packaged by the packaging method according to the second or third invention. Shows the completed packaging form. The first rectangular surface W1 of the article to be packaged W such as a sandwich covered with the central rectangular portion 1 of the sandwich packaging film sheet S1 is arranged on the display shelf so as to have a forward inclined surface, and is covered with the rectangular surface covering portion 5b. The third rectangular surface W3 of the packaged object W on which the fins 9, 11 are folded is arranged on the display shelf so as to be the bottom surface.
FIG. 9 (b) shows a state in which the packaging is released from the packaging form. In the packaged form, the cuts 8, 8 are located at the fins 10, and the ends of the cut tapes T1, T2 between the cuts 8, 8 serve as tear-starting knobs. The packaging film sheet S1 is gradually cut open along the taped shape of the tapes T1 and T2, and the entire width of the first rectangular surface W1 of the article to be packaged W is exposed at the center of the central rectangular portion 1. It has an easy open function that allows the article to be packaged W to be easily taken out without being caught in the package.

Next, a packaging film sheet of a second embodiment used in the packaging method according to the present invention will be described with reference to FIG. The package W to be packaged with the packaging film sheet S2 has the same size of the triangular surface and a thickness of about 1.5 times as large as that of the package W shown in FIG. 1 (A3ＡA2).
× 15). That is, this embodiment shows a change in the shape of the packaging film sheet S2 when the thickness of the article to be packaged W changes, and also shows that there is no difference in the packaging form and the easy-open function. This packaging film sheet S2 is similar to the packaging film sheet S1 of FIG.
A packaging film sheet F2 having a octagonal overall plane shape composed of a single film or a laminated film of a biaxially stretched film.
And two cut tapes T1 and T2 that are attached and welded to the packaging film sheet F2, and a starting point provided on the packaging film sheet F2 to pinch and tear the ends of the two cut tapes T1 and T2. A notch for tearing the packaging film sheet F2 to release the packaging,
Consists of eight. The packaging film sheet F2 has a central rectangular portion 1, triangular surface covering portions 2, 3, and rectangular surface covering portions 4a, 4b,
5a, 5b, triangular surplus parts 6a, 6b, and trapezoidal surplus part 7
a and 7b. The two cut tapes T1 and T2 are close to each other at the center of the edge of the surplus portion 7a of one trapezoid, are widely separated from one another by the full width in the central rectangular portion 1, and are at the center of the edge of the surplus portion 7b of the other trapezoid. They are welded in a curved shape close to each other. The difference between the packaging film sheet S2 and the packaging film sheet S1 in FIG.
The only difference is that the related dimensions are different due to the shape capable of packaging the article to be packaged W whose thickness is about 1.5 times larger. In the figure, A3 is 1.5 times the size of A2 in FIG. 1, and the size of B3 is A3- (1 to 5 mm). Since the size of A3 is 1.5 times the size of A2 in FIG. 1, the separation distance between the cut tapes T1 and T2 is also separated by the full width of the central rectangular portion 1. As the dimension of B3 increases, the relation dimension C3 of the trapezoidal surplus parts 7a and 7b and the triangular surplus parts 6a and 6b becomes about 1.5 times larger than the dimension of C2 in FIG. Therefore, the overhang dimensions of the three fins 9, 10, 11 shown in FIG. However, even when the thickness of the packaged object W increases, the size of the triangle when cutting the four corners by attaching the cut tapes T1 and T2 to the continuous film does not change. As shown in FIG. 4, the packaging film sheet S2 double covers the second and third rectangular surfaces W4 and W5 of the article W to be packaged by the rectangular surface covering portions 4a, 4b, 5a and 5b during packaging. The configuration is the same as the packaging film sheet S1 in FIG. Accordingly, the packaging process, the packaging form, and the easy-open function of the packaging object W by the packaging film sheet S12 are the same as those of the packaging film sheet S1 of FIG. 1 described above. Therefore, as a packaging machine, the dimension of A3 is 1.5 times the dimension of A2 in FIG.
The distance between the pair of side film pressing plates 25 and 26 can be adjusted, and the stroke of the first folding plate 34, the stroke of the second folding plates 36a and 36b, the stroke of the lateral feed plate 35, etc. It is good to make it versatile so that it can be changed and can correspond to various sizes. The present invention is also applicable to packaging with a packaging sheet not having the easy-open function.

According to the present invention, the required octagonal packaging film sheet S1 is bent into a channel shape so as to cover the longest first rectangular surface W1 and the triangular surfaces W2 and W3 on both sides of the triangular prism-shaped packaged object W. Any method may be used for the folding until the insertion. In the present invention, it is not necessary to fold the fins 9 and 11 on the rectangular surface covering portion 5b and apply the point seals 14a and 14b so that the fins 9 and 11 are not opened as they are (see FIG. 5). The present invention is not limited to the packaging of a packaged object whose triangular surface is an isosceles right triangle. In the present invention, the packaged object whose triangle surface is an isosceles right triangle is turned upside down, a required octagonal packaging film sheet is supplied on the upper side thereof, the packaged object is pushed up, folded into a channel shape, and folded from the side. Opposing folding plates 34, 36a, 3
6b (provided upside down) is included, and then the horizontal feed is included.

[0019]

According to the present invention, the method for packaging a triangular prism-shaped article to be packaged can employ a packaging film sheet obtained by cutting a continuous film fed from a raw film roll into a required octagon. The wrapping film sheet is bent into a channel shape to cover the longest first rectangular surface W1 and the triangular surfaces W2 and W3 of the triangular prism-shaped wrapped object W, and the second peripheral portion S11 of the wrapped object W is covered by one film peripheral portion S11. When the wrapping covering the third rectangle is performed and then fed laterally, the wrapping covering the second and third rectangular surfaces of the article to be packaged W can be doubled by the peripheral portion of the film on the other side. And tight packaging can be realized. The method for packing the triangular prism-shaped object to be packed according to the present invention is simple in that the number of steps for folding the package is small and the tight and hygienic packaging without excessive portion of the film is too large, especially after folding. The heat sealing and the bending of the fins and the sealing can be performed after the transverse feeding, and high-speed automatic packaging by a machine can be realized for the first time. On the other hand, Japanese Patent Application Laid-Open Nos. Hei 5-21459, Hei 7-277362 and Hei 8-09133
No. 2 cannot perform tight packaging, cannot perform high-speed packaging, is not hygienic, and has not been put to practical use. JP-A-6-3450
47, JP-A-7-291348 discloses that the surplus portion of the film is too large,
High-speed packaging is not possible, and this has not been put to practical use. JP
10-236524 states that it has the effect of tight packaging, but does not specify or suggest an automatic packaging machine that can be realized. In other words, it is a mere paper plan, as shown in the drawing, and there is no prospect that tight packaging can be realized. Specifically, Japanese Patent Application Laid-Open No. Hei 10-236524 discloses a heat sealing method in which only the sealing width between the edges of the film is secured at the center of the width of the two rectangular surfaces inclined to both sides which are the upper surface of the packaged object W. It can be seen that the packaging can be performed in the same manner as the folding of the present invention, however, since there is no excess overlap of the film, as in the present invention, the packaging film sheet is formed into a channel shape. The two rectangular surfaces which are bent and closely cover the front surface (maximum rectangular surface) of the triangular prism-shaped packaged object W such as a sandwich and the triangular surfaces W2 and W3 on both sides, and then tilt to both sides to be the upper surface of the packaged product W Cannot be traversed after folding is performed to cover the film with one film peripheral portion S11 of the packaging film sheet, so that high-speed automatic packaging cannot be realized. The reason why the horizontal feeding cannot be performed is that one of the film peripheral portions S11 of the packaging film sheet that first covers the two rectangular surfaces inclined to both sides, which are the upper surface of the packaged object W, has the film peripheral portion S11 that covers the two rectangular surfaces later. Since it is not pressed by the other film peripheral portion S12 (the overlap is only the seal margin portion), if the sheet is laterally fed, one film peripheral portion S11 of the packaging film sheet covering the two rectangular surfaces first opens. is there.

[Brief description of the drawings]

FIG. 1 is a development view of a packaging film sheet according to a second embodiment used in the method for packaging a triangular prism-shaped article to be packaged according to the present invention.

FIG. 2 is a schematic overall front view showing a packaging device for carrying out a method for packaging a triangular prism-shaped article to be packaged according to the second invention of the present application.

FIG. 3 is a perspective view of a main part of the apparatus shown in FIG. 2;

FIG. 4 is a perspective view showing a step of folding a packaging film sheet in the method for packaging a triangular prism-shaped article to be packaged according to the present invention.

FIG. 5 is a plan view of a main part of the apparatus of FIG. 2;

FIG. 6 is a schematic cross-sectional view showing a packaging step of a main part of the apparatus in FIG. 2;

FIG. 7 is a perspective view showing a main part of a packaging device for carrying out a method for packaging a triangular prism-shaped article to be packaged according to the third invention of the present application.

FIG. 8 is a schematic cross-sectional view showing a packaging step of a packaging section, which is a main part of a packaging apparatus for implementing the method for packaging a triangular prism-shaped article to be packaged according to the third invention of the present application.

FIG. 9 (a) is a diagram illustrating a packaging object W such as a sandwich by the packaging film sheet according to the first embodiment of the present invention.
FIG. 3B is a perspective view showing a packaging form in which is packaged, and FIG. 4B is a perspective view showing a state in which the packaging is unwrapped.

FIG. 10 is a development view of a packaging film sheet of a second embodiment used in the packaging method according to the present invention.

[Explanation of symbols]

S1: packaging sheet, S11, S12: peripheral part of film, F1: sheet-like film, 1: central rectangular part, 2, 3 ... triangular surface covering part, 4a, 4b, 5a, 5b ...
Rectangular surface covering part, 6a, 6b ... surplus part of triangle, 7a, 7b
... Excessive portion of trapezoid, T1, T2 ... Cut tape, 8,
8 ... notches, 9,10,11 ... fins, 9a, 9b, 1
0a, 10b, 11a, 11b: Half fin, 12a, 12b: Heat seal, 13a, 13b, 13c: Heat seal, 14a, 14b
..Point seals, W ... Triangular prism-shaped objects to be packaged, W
1 ... first rectangular surface, W2, W3 ... triangular surface, W4 ...
・ Second rectangular surface, W5: Third rectangular surface, 20: Table, 21: Lifting plate, 22: Vacuum box, 24: Nipping hand, 24a: Angle plate , 24b, 24b
..Holding plates, 25 ... side folding plates, 25a ... triangle holes, 2
6 ... side folding plate, 26a ... opening, 26b ... triangular folding hole, 27a, 27b ... film holding guide, 28a, 28b ... heat sealer, 29a, 29b, 30, 31・ ・
・ Heat sealer, 32,42 ・ ・ ・ Fin bending guide, 33 ・ ・ ・ Lower table, 34 ・ ・ ・ First folding plate, 35
... a triangular transverse feed plate, 36a, 36b ... second folding plate, 37 ... film feeding roll, 38 ... die roll cut roll, 39 ... belt conveyor, 39a
..Conveyor belts, 39b, 39c ... suction boxes, 40
a, 40b: Apron tail, 43, 44: Heat sealer, 45: Belt conveyor, R: Raw film roll, F: Film, S2: Packaging sheet, F2
... Packaging film sheets,

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 11, 2000 (2007.1.
1)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 7

[Correction method] Change

[Correction contents]

FIG. 7

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E051 AA03 AB05 BA05 CA08 CB03 DA08 EA03 FB01 FC01 HA02 HA08 HE01 JA02 JA08 KA02 KA03 KA07 KA09 KA10 KB01 LA02 LA03 LA04 LA07 LB03 3E096 AA05 BA28 BB07 CA11 EA02X FA29

Claims (3)

[Claims] 1. A required octagonal packaging film sheet S1 is bent into a channel shape to cover the longest first rectangular surface W1 of a triangular prism-shaped packaged object W and triangular surfaces W2 and W3 on both sides. After being sandwiched between the side film holding plates 25 and 26, the packaged material W is provided on the side of the one side film holding plate 25 and passes through the opening 25a provided in the one side film holding plate 25. First folding plate 3 that can move so as to slide on second rectangular surface W2 and third rectangular surface W3
4 is inserted into one of the film peripheral portions S11 extending outward to cover the one triangular surface W2 of the article to be packaged W and reach the middle of the second rectangular surface W2 and the third rectangular surface W3. By moving so as to cover, the one film peripheral portion S
The three fin halves 9 which cover the second rectangular surface W2 and the third rectangular surface W3 at 11 and extend outward from three ridges connecting the vertices of the triangular surfaces W2 and W3 on both sides of the packaged object W respectively.
a, 10a, 11a, and then provided on the side of the other side film holding plate 26, the other side film holding plate
The second folding plates 36a and 36b that can move so as to slide on the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W through the opening 26b provided in the The other film peripheral portion S1 extending outward covering the surface W3
2 and a second rectangular surface W2 and a third rectangular surface W3.
By moving so as to cover halfway, the one film peripheral portion S11 overlaps the other film peripheral portion S12, and three ridge lines connecting the vertices of the triangular surfaces W2, W3 on both sides of the packaged object W. Three fin halves 9b, 10b, 11b each extending further outward are formed, and then a transverse feed plate 35 provided on the side of the one side film pressing plate 25 is provided on the one side film pressing plate 25. Moving through the opening 25a, and pressing the one triangular surface W2 of the packaged object W, the packaged object W is moved to the second folding plates 36a, 36b.
Is pressed until it slides under the lower side, and after passing, a pair of film holding guides is used to guide the film peripheral portions S11 and S12 which double cover the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W. 27
The heat sealers 28a and 28b are pressed against the edges of the outer film peripheral portion S12 which covers the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W by pressing the heat sealers 28a and 28b so as not to open the outer film. Applying heat seals 12a and 12b to the edge of the peripheral portion S12 with respect to the inner film peripheral portion S11 and applying heat seals 13a, 13b and 13c to the fins 9, 10, and 11 in the vicinity of the object W to be packaged. A method of packaging a triangular prism-shaped article to be packaged, characterized by the following. 2. A foldable form in which a required octagonal packaging film sheet S1 is bent into a channel shape to cover the longest first rectangular surface W1 and triangular surfaces W2, W3 on both sides of a triangular prism-shaped packaged object W is formed as a pair. After being sandwiched between the side film holding plates 25 and 26, the packaged material W is provided on the side of the one side film holding plate 25 and passes through the opening 25a provided in the one side film holding plate 25. First folding plate 3 that can move so as to slide on second rectangular surface W2 and third rectangular surface W3
4 is inserted into the one film peripheral portion S11 extending outward to cover the one triangular surface W2, and
By moving so as to cover halfway or almost the entire surface of the second and third rectangular surfaces W3, the second rectangular surface W2 and the third rectangular surface W3 are covered with one film peripheral portion S11 and both sides of the packaged object W are covered. Three fin halves 9a, 10 extending outward from three ridges connecting the vertices of the triangular surfaces W2, W3, respectively.
a, 11a, and then one side film holding plate 2
5 is moved through the opening 25a provided in the one side film pressing plate 25 of the packaged object W to push the one triangular surface W2 of the packaged product W to be packaged. The object W passes through the folding hole 26a provided in the other side film holding plate 26, and the one film peripheral portion S11
And three fin halves 9b, 10b, 11b extending outward from three ridges connecting the vertices of the triangular surfaces W2, W3 on both sides of the packaged object W, respectively. After being formed and passed, the film peripheral portions S11 and S12 which double cover the second rectangular surface W2 and the third rectangular surface W3 of the packaged object W are paired with a pair of film holding guides 27a and 27b.
Outer peripheral portion S1 covering the first rectangular surface W1 and the second rectangular surface of the article to be packaged W by pressing so as not to open.
The heat sealers 28a, 28b are pressed against the edges of the second film, and the edges of the outer film peripheral portion S12 are heat-sealed to the inner film peripheral portion S11. Heat seals 13a, 13b, 13 near the package W
c. A method for packaging a triangular prism-shaped article to be packaged, wherein c is applied. 3. The required octagonal packaging film sheet S1 is bent into a channel shape and folded into a form that covers the longest first rectangular surface W1 and the triangular surfaces W2 and W3 on both sides of the triangular prism-shaped packaged object W, The one film peripheral portion S11 and the other film peripheral portion S12 overlap the second rectangular surface W2 and the third rectangular surface W3 doubly, and the other film peripheral portion S11
The film is laterally fed to the side of the triangular surface W3 covered with 12, and the film peripheral portions S11 and S12 are pressed by a pair of film pressing guides 27a and 27b so as not to be opened, and the outer film peripheral portion S12 is held.
Heat seals 12a, 12b are applied to the inner peripheral portion S11 of the film, and heat seals 13a, 13b, 13c are applied to the fins 9, 10, 11 in the vicinity of the object W to be packaged. The method of packaging triangular prism-shaped items to be packed.