JPH0939940A - Web corner carton - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web corner carton for which side walls of a tray with its webs at four corners folded up are less liable to fall, and being available for satisfactory filling of contents. SOLUTION: Insert pieces 8 are provided at both side ends of each of turn-up flaps 9 extending, with creases interposed in between, from side walls on the right and the left of a carton blank having webs at its four corners. The turn-up flaps 9 are turned up at an angle of 180 deg. so that folding pieces 6 and 7 folded up at the exterior of the right and the left side walls can be partially covered therewith while the insert pieces 8 only are inserted to the underside of the folding pieces 6 and 7, and thereby four corners of the carton are fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for assembling a direct filling web corner carton having a liquid leakage preventing function.

[0002]

2. Description of the Related Art Conventionally, cooked foods with freshly fried chicken, chicken nuggets, sauce, gravy, sauces, etc.
For cartons of frozen foods, etc., to prevent leakage of oil, seasonings, gravy, etc. from the four corners, the four corners of the carton blank are folded into the four corners as shown in FIG. Cartons are used. On the other hand, as a normal carton without liquid leakage prevention, a carton having notches up to the four corners of the bottom plate is often used as shown in FIG. Generally, a web corner carton is molded with a box former, and then immediately filled and closed with a lid, or a carton that is pasted with a sack pasting machine or a box former is once folded flat to a predetermined place, for example, fast. There is a case where the carton is raised again to be molded after being transported to a food store or the like, and the filling of the contents and the closing of the lid are all manually performed. Fig. 5 shows a conventional carton for liquid leakage prevention. If you fold the flat carton by hand after pasting the glue margin shown by the halftone dot,
It can be molded into the state of (b).

[0003]

However, the web corner carton which has been used in the past and which is pre-glued and used by raising it at the store, has its side walls all fall outward as shown in FIG. I cannot keep the tray shape. Although it is possible to maintain a uniform shape by gluing all the corner folds, it is no longer possible to fold the entire carton flat this time, and the carton has to be carried in the molded state, so it is extremely distributed. This will reduce efficiency. Further, in a general carton, there is a so-called crease due to the carton being flatly folded as shown in FIG. If the shape of the tray formed as described above remains unstable, there is a problem that it is difficult to carry out the work of packing the content products and closing the lid. In particular, when a plurality of items are packed on the entire surface of the carton, the work efficiency is lowered. There is also a problem that such a shape collapses even when the package is opened, and the appearance of the container is impaired. The present invention has been made in view of the above problems, and an object of the present invention is to provide a web corner carton for over-the-counter molding, in which the side wall does not collapse and the tray shape can be firmly maintained.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In the present invention, the front and rear side walls of a rectangular base plate are connected to the front and rear side ends thereof via folding lines, and the left and right side ends of the bottom plate are connected to each other. The left and right sidewalls are connected to each other through folding lines, and the left and right sidewalls are connected to each other, and the top plate is connected to the extension of the rear side wall through the folding lines. In the carton blank in which the folding pieces connected to each other at both end edges via folding lines are connected via perforations extending radially outward from the four corners of the bottom plate, the adjacent folding pieces face each other. To keep the folded state on the front and back or left and right side walls
A gist of a web corner carton is that a locking means is provided. (First Locking Means) Insertion pieces are provided at both side ends of the folding flap formed on the left and right side walls via folding lines.
The folding flap is folded back 180 ° so as to cover a part of the folding piece folded on the outer surface of the left and right side walls, and only the inserting piece is inserted below the folding piece. (Second Locking Means) Slits are provided at both ends of a folding flap formed by extending the front side wall through a folding line, and projecting pieces are provided on outer edges of two sets of the folding pieces adjacent to the front side wall and the left and right side walls. After the folding pieces are folded on the outer surfaces of the left and right side walls, the folding piece is folded back by 90 ° and the projection piece is fitted in the slit. (Third Locking Means) Folding pieces are connected to each other through both ends of the left and right side walls via a folding line having a notch formed in the outer edge of the folding piece connected to the outer edges of the folding piece. Protruding pieces are provided on the outer edges of the folding pieces that are connected to each other via a folding line, and after the folding pieces are folded inside the left and right sidewalls, the folding pieces are placed inside the left and right sidewalls so that the protruding pieces face each other and overlap each other. ° To consist of folding.

[0005]

The present invention will be described in more detail with reference to the drawings. FIG. 1 is a blank rear surface development view of a web corner carton by the first locking means according to the present invention. As shown in FIG. 1 (a), this carton is provided with left and right side walls 3 and front and rear side walls 2 on the front and rear and right and left sides of a bottom plate 1 through folding lines, and folding pieces 6 and 7 are connected to both side ends of each side wall so as to be adjacent. Folding flaps 9 having inserts 8 at both ends are extended to the left and right side walls 3 of the carton blank in which the top plate 4 is connected to the rear side wall through the folding lines. It consists of a structure. In FIG. 1, halftone dots at each corner indicate an adhesive portion, dark halftone dots mean that they are provided on the front surface of the carton blank, and light halftone dots mean that they are provided on the back surface. Adjacent adhesive parts are adhered so as to face each other, but glue may be applied to either. The carton tray centered on the bottom plate 1 is folded along the folding lines a at the left and right edges of the bottom plate 1, and then the front side wall and the rear side wall with the lid are folded inside at the folding lines b at the front and rear edges of the bottom plate 1. It is possible to fold it flat while the adhesive portion is adhered. It is preferable to use a hot melt adhesive having good initial tackiness as the adhesive. Note that the lid is the same as the conventional one and is not the subject of the present invention, so the description thereof is omitted. Now, the above flat folded carton is manually raised at the store to be shaped into a tray, and the folding flaps 9 extending to the left and right side walls are folded back 180 ° outside the left and right side walls of the shaped tray. When,
It covers the upper portions of the overlapping folding pieces 6 and 7, and only the inserting pieces 8 at both ends of the folding flap 9 are inserted below the folding pieces 6 and 7, so that the four corners are shown in FIG.
It is fixed as shown in (b) to obtain a web corner carton 10 '.

FIG. 2 is a blank rear surface development view of the web corner carton by the second locking means according to the present invention.
As shown in FIG. 2 (a), the base portion subjected to the web corner processing has the same structure as described above, but slits 13 are provided at both ends of the folding flap 12 extending the front side wall 2 through the folding line. On the other hand, protrusion pieces 11 and 11 'are provided on the outer edges of the folding pieces 6 provided on both side ends of the front side wall 2 and the front folding pieces 7 of the left and right side walls 3. Gluing the web corners as described above, raising the folded folding carton, folding the upright folding flap 12 inward by 90 °, and in the slits 13 provided at both ends thereof,
When the projection pieces 11 and 11 'are fitted together in an overlapping state, a web corner carton 20' having a fixed front portion of the tray portion is obtained as shown in FIG. 2 (b).

FIG. 3 is a blank development rear view of a web corner carton according to the third locking means of the present invention.
As shown in FIG. 3 (a), the base portion subjected to the web corner processing has the same structure as that described above, but the margins at the four corners are provided on the back surface. Therefore, the folding pieces 6 and 7 are folded on the left and right side walls inside the carton. On the outer edge of the folding piece 7 connected to both ends of the left and right side walls 3 via the folding line, folding pieces 15 are provided via a folding line c having a notch forming a projection piece 14 in the middle, while one end of the front side wall 2 is provided. When the protruding piece 14 'is provided on the outer edge of the folding piece 6 connected to each other via the folding line and the folding pieces 6 and 7 are folded inside the left and right side walls, the protruding piece 14' is in a state of protruding upward. Finally, the folding piece 15 that also protrudes upward is inward 180 °
When folded, the protrusion 14 at the center of the fold line c projects upward, but if it is positioned so as to overlap the protrusion 14 'that has already protruded upwards, the locking action will work and the four corners as shown in FIG. Fixed web corner carton 30 '
Is obtained.

The range of paperboard used in the web corner carton according to the present invention is wide, and most paperboards such as coated balls, craft balls, and Manila balls can be used. Basis weight varies depending on carton size, 300-450g
/ M ² is preferred. Further, depending on the contents, it is effective to use oil-resistant paper due to resin impregnation, or polyethylene-coated paper that blocks exudates from aqueous contents. Generally, the surface of the carton is printed,
Any known method such as offset, gravure or flexographic printing may be used. Further, post processing such as overcoating, polishing, and embossing can be freely performed. However, it is preferable that the adhesive portions 6 and 7 and the adhesive portion of the lid portion have no overcoat layer or the like.

Perforations are radially provided at the four corners of the web corner carton according to the present invention. This is to reduce the folding resistance of the blank corner folding pieces 6 and 7 to facilitate folding, but It is necessary to avoid perforations in the near area as much as possible in order to prevent liquid leakage.

[0010]

Example: A special plate having a basis weight of 370 g / m ² (Ultra H, manufactured by Daishowa Paper Co., Ltd.) is used as a paper base material, and a bottom plate size 2 is used.
The web corner carton containing 10 fried chicken of 70 × 225 mm and side plate height of 80 mm is used for the above first to third items.
It was prototyped using the means. The height of the folding piece 9 in the first means was 70 mm, the height of the folding flap 12 in the second means was 69.5 mm in the slit portion, and the other portions were approximately half. A web corner carton blank having the above size was prototyped according to FIGS. 1 to 3 and was folded flat while adhering the corners. A strong adhesive type of acrylic resin was used as the hot melt adhesive.

[0011]

According to the web corner carton according to the present invention, a firm tray shape can be maintained by the locking means provided at the two corners or four corners of the web corner type carton for over-the-counter molding. Will also be excellent. As a result, the workability of packing products and closing the lid is improved, and a carton with a good appearance that is not strange as tableware can be obtained.

[Brief description of drawings]

FIG. 1 is a blank rear surface development view and an assembly view of a web corner carton with a first locking means.

FIG. 2 is a blank rear surface development view and an assembly view of a web corner carton with a second locking means.

FIG. 3 is a blank rear surface development view and an assembly view of the web corner carton by the third locking means.

FIG. 4 is a blank rear surface development view and assembly view of a conventional general carton.

FIG. 5: Backside development view and assembly view of a conventional web corner carton

[Explanation of symbols]

 1 Bottom plate 2 Front and rear side walls 3 Left and right side walls 4 Top plate 5 Perforations 6 Folding pieces 7 Folding pieces 8 Inserting pieces 9 Folding flaps 10 Carton blanks by the first locking means 10 'Cartons by the first locking means 11 Projecting pieces 11' Projections Piece 12 Folding flap 13 Slit 14 Projecting piece 14 'Projecting piece 15 Folding piece 20 Carton blank by the second locking means 20' Carton by the second locking means 30 Carton blank by the third locking means 30 'Third locking means By carton a fold line b fold line c fold line with a notch in the middle

Claims (4)

[Claims] 1. An extension of the rear side wall, wherein front and rear side walls of the rectangular bottom plate are connected to each other through folding lines, and left and right side walls of the bottom plate are connected to each other via folding lines. The top plate is connected to the portion via a fold line, and the folding pieces connected to both side edges of the front and rear side walls via folding lines and the folding pieces connected to both side edges of the left and right side walls via folding lines are described above. In a carton blank that is connected through perforations that radially extend outward from the four corners of the bottom plate, it is necessary to keep the folded pieces on the front and rear or left and right side walls so that the adjacent folding pieces face each other. A web corner carton characterized by having a stop. 2. The interlocking means is provided with insert pieces at both ends of a folding flap formed by extending the right and left side walls through folding lines, and the folding flap is folded on the outer surface of the left and right side walls. 180 to cover a part of the piece
The web corner carton according to claim 1, wherein the webbing corner carton is folded back and only the insert piece is inserted under the insert piece. 3. The locking means is provided with slits at both ends of a folding flap formed by extending the front side wall through a folding line, and outer edges of two sets of the folding pieces adjacent to the front side wall and the left and right side walls. A web is characterized in that a projection piece is provided in the web, the folding pieces are folded on the outer surfaces of the left and right side walls, the folding piece is folded back by 90 °, and the projection piece is fitted in the slit. Corner carton. 4. The locking means connects the folding piece with a folding line having a notch formed in the middle of the outer edge of the folding piece connected to both ends of the left and right side walls with the folding line, and the one front Protruding pieces are provided on the outer edges of the folding pieces that are connected to each other at both ends of the side wall via folding lines, and after the folding pieces are folded inside the left and right sidewalls, the folding pieces are placed on the left and right sides so that the protruding pieces face each other and overlap each other. A web corner carton characterized by being folded 180 ° inside the side wall.