JPH072216U - Foldable cardboard box - Google Patents

Abstract

(57) [Abstract] [Purpose] It is easy to open and close the lid pieces that are connected to the upper edges of the four sides of the box through folds, and the durability is excellent. (EN) Provided is a folding corrugated cardboard box which does not require a gap for engaging a lid piece on the upper part. [Structure] Of each pair of opposing lid pieces that are folded over each other, one opposing lid piece has a total of four insertion cuts for inserting the upper edge corners of the other opposing lid piece that are closed. , Provided diagonally with respect to this fold line with the fold line as the starting end,
An engaging cut extending from the fold toward the upper edge of each opposing lid piece is provided at a predetermined distance from the inserting cut, and the lower end of the engaging cut and the starting end of the inserting cut are formed into the fold. And form a push piece surrounded by these three cuts, and insert the respective upper edge corners into the insertion cuts on the other opposing lid piece.
An engaged cut that is engaged with the engagement cut is provided in a state in which the pushing piece is pushed down.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is provided with four lid pieces connected to the upper edge of each side of the rectangular box through folds, and each lid piece has a plurality of lid pieces folded to fix the lid closed state. The present invention relates to a foldable corrugated cardboard box having a cut line.

[0002]

[Prior art]

 The present invention relates to an improvement of the "corrugated cardboard packaging box" filed by the applicant of the present application as "Practical application No. 53-123220 (Publication No. 58-34008)". As shown in FIG. 5, the invention of this prior application is one of four lid pieces forming a foldable lid, and the front and rear folding pieces (lid pieces) 2a, 2b which are opposed to each other are located near the left and right ends of the lid pieces, respectively. The substantially U-shaped engaging holes (cuts) 5 are provided at a total of 4 locations, and the insertion heads 4 are provided at a total of 4 locations on both sides of the upper edges of the left and right folding pieces (lid pieces) 3a and 3b facing each other. And a fold line Z that folds these lid pieces in two in the height direction. The action is that the front and rear folding pieces 2a and 2b are first bent at a right angle in a facing manner, and then the left and right folding pieces 3a and 3b are bent at a facing manner, and the folding lines Z are also bent downwards. By making it easy to insert 4 and inserting into the respective engaging holes 5 at the positions corresponding to the respective insertion heads 4, the lid is completely closed as shown in FIG. In this state, the engaging projections 7 provided on the edge of each engaging hole 5 and the engaging jaws 9 provided on both side ends of the left and right folding pieces 3a and 3b are engaged with each other, and The head 4 is prevented from coming off.

[0003]

[Problems to be solved by the device]

 In the above-mentioned “cardboard packaging box”, when inserting the insertion head 4 into the engagement hole 5, it is necessary to bend the insertion head 4 downward so that it can be easily inserted. In addition to the time-consuming closing operation, the lid of this box, which was made on the assumption that it will be used repeatedly, may have the part of the insertion head 4 torn off if it is kept open and closed roughly. Further, as shown in FIG. 7, since the insertion head 4 is inserted obliquely downward into the engagement hole 5, in order to facilitate this insertion, the insertion head 4 is placed in the upper part of the box containing the packaged items. It is necessary to leave some space between the boxes, which makes it difficult for the packed boxes to withstand stacking. Therefore, the object of the present invention is to open and close the lid more easily than the one of the above-mentioned prior application, and to have excellent durability, and to close the lid without providing a gap in the upper part of the box when the packaged goods are stored. This is to provide a folding cardboard box that can be used.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the folding corrugated cardboard box according to the present invention is a rectangular box in which lid pieces connected to the upper edges of the respective sides via folds are folded in a mutually facing manner to close the lid. In one of the pair of opposed lid pieces, one of the opposed lid pieces 6 and 7 is provided with the upper edge corner portion c of the other closed opposed lid pieces 8 and 9. A total of four insertion cuts 10 to be inserted are provided obliquely with respect to the fold line E with a predetermined position on the fold line E as a start end a, and a predetermined distance from the start line a, and from the fold line E to the above. A predetermined length of engaging cut 11 extending toward the upper edge of each facing lid piece is provided, and the lower end of the engaging cut 11 and the starting end a of the inserting cut 10 are cut along the fold line E. To form the pushing piece 13 surrounded by these cuts 10 to 12, The upper edge corner portions c of the lid pieces 8 and 9 are respectively inserted into the insertion cuts 10 and the pushed pieces 13 are pushed down to be engaged with the engagement cuts 11. The cut 15 is provided, and the refraction fold F parallel to the fold E is provided. Each of the insertion cuts 10 may be formed in a substantially 1/4 circular arc shape, and an auxiliary cut 14 may be provided at a terminal end b of the insertion cut 10 in a direction orthogonal to the fold E. .

[0005]

[Action]

 In order to close the lid of the cardboard box, first, one of the opposing lid pieces 6 and 7 is bent at a right angle so as to face each other, and then the other of the opposing lid pieces 8 and 9 is directed downward along the respective bending folds F. If the upper edge corners c are inserted into the insertion cuts 10 of the opposite lid pieces 6 and 7 in a sideways manner, the lid closing operation can be completed easily and quickly. It In this state, the engaged cuts 15 of the other facing lid pieces 8 and 9 are caught by the engaging cuts 11 of the one facing lid pieces 6 and 7, and are reliably prevented from coming off. To open the closed lid, place a hand on the center of the upper edge of the other opposing lid piece 8, 9 to exert a pulling force, and pull each upper edge corner c from each insertion cut 10. You can get out.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The folding corrugated cardboard box of the present invention, as shown in FIG. 1, is a rectangular corrugated cardboard 100 in which folds and cuts are provided at a plurality of predetermined places so that both side edges of the rectangular corrugated cardboard 100 are connected to each other to form a foldable corrugated box. It is made in a tubular shape. This rectangular corrugated cardboard 100 is provided with longitudinal folds A, B, and C at predetermined intervals from the left side end (in the figure) in the longitudinal direction, and four box side surfaces 1, 2, 3, 4 And a glue margin piece 5 to be joined to the left end of the box side surface 1 is connected to the right end of the box side surface 4 through a fold D. Then, on the upper edges of the box side surfaces 1 and 3, one opposing lid piece 6 and 7 is continuously provided via a fold line E, and on the upper edges of the box side surfaces 2 and 4, the other opposing lid piece 8 is provided. And 9 are connected to each other through a fold line E. The height dimensions of the opposed lid pieces 6 to 9 are the same.

On one of the opposing lid pieces 6 and 7, insertion slits 10, 10 each having a substantially 1/4 circular arc shape are formed at a position separated from each left and right ends by a predetermined distance, and a start end a of the insertion slit 10 is above the fold line E. The terminals b are located so that they are close to each other. A predetermined length of engaging cut 11 extending from the fold E toward the upper edge of each facing lid piece is provided between the left and right ends and the starting end a, and the lower end of the engaging cut 11 is further extended. And the start end a of the insertion cut 10 are connected by a connection cut 12 along the fold line E. As a result, the pressing piece 13 surrounded by these cuts 10 to 12 connected to each other is formed. Further, a linear auxiliary cut 14 having a predetermined length is connected to the end b of the cut 10 for insertion in a direction orthogonal to the fold E.

The other opposing lid pieces 8 and 9 are engaged with a total of four places which overlap with four engaging cuts 11 provided on the one of the opposite lid pieces 6 and 7 in a state where the box lid is closed. Engagement cuts 15 having substantially the same length as the cuts 11 are provided sideways.

Rectangular bottom pieces 16 to 19 having the same height are connected to the lower edges of the box side surfaces 1 to 4 via folds G, respectively.

Next, the operation of the above configuration will be described. The foldable corrugated cardboard box of the present invention, which is formed into a rectangular tube shape by joining both ends of one corrugated board 100 to each other and can be folded flat during storage, is expanded into a rectangular tube shape when used. First, each of the bottom pieces 16 to 19 is bent inward at a right angle along the fold line G, and this state is fixed by known means to form the bottom of the box.

Therefore, the article to be packed is placed in the box and the box lid is closed. To do this, first of all, one of the opposing lid pieces 6 and 7 is bent at a right angle inward along the fold line E, Subsequently, the other facing lid pieces 8 and 9 are folded along the fold line E to fold them on top of each other, and the upper edge corner portions c are inserted into the respective insertion cut lines 10. At that time, as shown in FIG. As shown in, when the birefringence folds F and F are bent downward, the other opposing lid pieces 8 and 9 are directed to the upper surfaces of the one opposing lid pieces 6 and 7 as parallel as possible. You can go. When each upper edge corner c is placed on each pressing piece 13 and a pressing force is exerted on the other opposing lid piece 6, 7, an auxiliary cut 14 is extended to the insertion cut 10. Therefore, the pressing piece 13 is pushed down by a relatively weak force by the thickness of the corrugated board, and each upper edge corner c is easily inserted under the circular arc surface surrounded by the insertion cut 10. Can be crowded. Thus, the lid closed state in which the four opposed lid pieces 6 to 9 are overlapped with each other is fixed.

In this lid-closed state, the engaged cuts 15 provided on the other opposing lid pieces 8 and 9 are provided on one of the opposing lid pieces 6 and 7 as shown in FIG. Further, since each engaging cut 11 is caught and prevented from coming off, there is almost no possibility that the lid closed state will be released by the external force acting during transportation. Therefore, at least the banding work for packing for the purpose of preventing the lid from coming off becomes unnecessary.

When the lid of the packaged cardboard box is opened, a hand is placed on the center of the upper edge of each of the other opposing lid pieces 8 and 9, and a pulling force is exerted on the engaging cut 11 and the engaged cut 15. Since the engagement with and is released, each upper edge corner c can be easily pulled out from each insertion cut 10. In the above structure, the insertion cut 10 is not limited to the shape of a 1/4 circular arc, and may be a simple diagonal cut or a V-shaped cut.

[0014]

[Effect of device]

 As is apparent from the above description, the folding corrugated cardboard box according to the present invention has the following practical advantages as compared with the above-mentioned prior invention by the applicant of the present application. (A) Since it is not necessary to have a crease at each of the upper edge corners of the other facing lid piece that is inserted into each insertion cut of the one facing lid piece, it is possible to insert it in a sideways sliding state. As in the case of the desired one, it is not necessary to provide a gap in the upper part of the box containing the packaged items so as not to obstruct the insertion head inserted at an angle. (B) Therefore, even if a large number of packed cardboard boxes are stacked, there is no risk of the cardboard boxes being crushed. (C) Since the other opposing lid piece does not need to have a crease in the portion to be inserted into the insertion slit, the lid opening / closing operation can be efficiently performed correspondingly. (D) In addition, unlike the prior application, which has the shape of a projecting piece that is easily broken, the above-mentioned insertion portion does not have an uneven shape, and therefore has excellent durability.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a plan view of a single processed rectangular corrugated board as a material for a corrugated board box.

FIG. 2 is a partial perspective view showing a state where the lid of the box is being closed.

FIG. 3 is a perspective view showing a state in which the lid is closed. 4 is a cross-sectional view taken along the line VV of FIG.

FIG. 5 shows a conventional example and is a perspective view of a state in which a lid is being closed.

FIG. 6 is a perspective view of the same with the lid closed.

FIG. 7 is a sectional view taken along line WW of FIG.

[Explanation of symbols]

 100 Rectangular cardboard 1 to 4 Box side surface 5 Paste margin piece 6,7 One opposing lid piece 8,9 The other opposing lid piece 10 Insertion cut 11 Engagement cut 12 Connection cut 13 Pushing piece 14 Auxiliary cut 15 Engagement Cuts 16 to 19 Bottom pieces A to G Folds a Start end b End c Top edge corner

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[Procedure amendment]

[Submission date] October 23, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a plan view of a single processed rectangular corrugated board as a material for a corrugated board box.

FIG. 2 is a partial perspective view showing a state where the lid of the box is being closed.

FIG. 3 is a perspective view showing a state in which the lid is closed.

4 is a cross-sectional view taken along the line VV of FIG.

FIG. 5 shows a conventional example and is a perspective view of a state in which a lid is being closed.

FIG. 6 is a perspective view of the same with the lid closed.

FIG. 7 is a sectional view taken along line WW of FIG.

[Explanation of Codes] 100 Rectangular Corrugated Cardboard 1 to 4 Box Side 5 Adhesive Piece 6,7 One Opposing Lid Piece 8,9 The Other Opposing Lid Piece 10 Insertion Cut 11 Engagement Cut 12 Coupling Cut 13 Pushing Piece 14 Auxiliary Break 15 Engaged break 16-19 Bottom piece A-G Fold a Start end b End c Top edge corner

Claims (2)

[Scope of utility model registration request] 1. A box in which lid pieces continuously connected to the upper edges of respective side faces of a rectangular box via folds are folded in a mutually opposing manner to close the lid, and each pair of lids is closed. Of the facing lid pieces, one of the facing lid pieces 6 and 7 has an upper edge corner portion c of the other facing lid piece 8 and 9 which is closed.
A total of four insertion cuts 10 for inserting are provided obliquely with respect to the fold line E with a predetermined position on the fold line E as a start end a, and are separated from the fold line E by a predetermined distance. An engaging cut 11 having a predetermined length that extends toward the upper edge of each facing lid piece is provided, and the lower end of the engaging cut 11 and the start end a of the insertion cut 10 are cut along the fold line E. The pressing piece 13 surrounded by these cuts 10 to 12 is formed, and the upper edge corner portions c of the opposite cover pieces 8 and 9 are inserted into the insertion cuts 10, respectively. A folding fold F which is provided with an engaged cut 15 to be engaged with the engagement cut 11 and a bending fold F parallel to the fold E in a state where the pushing piece 13 is pushed down. Cardboard box. 2. Each of the insertion cuts 10 is approximately 1 /
4. The folding corrugated cardboard box according to claim 1, which is formed in an arc shape and has an auxiliary cut 14 extending in a direction orthogonal to the fold E at the terminal end b of the insertion cut 10. .