JP2008162644A - Folding-back piece engaging structures at peripheral wall ends for foldable packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide folding-back piece engaging structures at peripheral wall ends for a foldable packaging box enabling their engagements to be carried out without using any adhesive agent. <P>SOLUTION: A packaging box of this invention is constructed in such a way that some foldable peripheral walls 3a, 3b, 4a and 4b are cooperatively arranged at each of the sides of a rectangular top plate or a rectangular bottom plate 2 and connecting pieces 7a, 7b folded along adjoining sides of the other peripheral wall and overlapping on the inner surface of the other peripheral wall are cooperatively arranged at one of the adjoining sides of the adjoining peripheral walls. Flap-like folding-back pieces 17, 22 folded-back along the inner surfaces of the peripheral walls are cooperatively arranged at each of the upper ends of the adjoining peripheral walls and at the same time the engaging portions for engaging and fixing adjoining ends 21, 23 of each of the folding-back pieces are arranged with the folding-back pieces folded back inside. The folding-back pieces are constituted by the engaging side folding-back piece 22 and the engaged side folding-back piece 17, and a floating auxiliary piece 26 for floating the end parts of the folding-back pieces forming a space 24 among the folding-back pieces and the inner surfaces of the peripheral walls 4a, 4b above the inner surfaces of the peripheral walls is installed at the folding-back piece 22 when the folding-back piece is folded back inside. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a folded piece locking structure for a peripheral wall end for a folding packaging box that accommodates an item such as a cake.

As a conventional foldable packaging box, front and rear, left and right peripheral walls 3, 4 are connected to a square or rectangular bottom plate 2 so as to be able to bend up and down, and a crease in a mountain line provided at an intermediate portion between adjacent peripheral walls 3, 4 A pleat-shaped connecting piece 7 that connects adjacent walls via 6 is connected in a foldable manner. The connecting piece 7 is composed of a fixed portion 8 that is bonded and fixed to the inner surfaces of the peripheral walls 3 and 4 adjacent to one side of the fold 6 and a movable portion 9 that can be bent and rotated via the fold 6. And the auxiliary | assistant fold 12 of the trough line which forms the movable pleat 11 which spreads toward the peripheral part of the surrounding walls 3 and 4 is formed on the fixed part 8 side of the connecting piece 7 formed by the fold line 6 of the mountain line. As shown in Patent Document 1, a foldable packaging box that can be assembled with a one-touch box formed by bending or bending in a chevron shape on the 6 side is known.
Utility Model Registration No. 099820

However, since the above-mentioned foldable packaging box is shipped in a plate-like folded state with a predetermined bonding point bonded in advance, the box can be assembled with one touch only by opening the side wall upper end at the shop floor or the like. However, after the upper end of the connecting piece is folded and stowed in an upright state by the presser piece that is foldably connected to the upper end of the front and rear peripheral wall on the inner surface side of the front and rear peripheral walls, the inner side of the presser piece and the connecting piece are Although it had to be bonded and fixed, the folded and pinched state of the connecting piece could not be maintained only by bonding and fixing. In addition, in order to facilitate box assembly at the storefront, it is shipped with an adhesive attached in advance, but if it is stored at the store for a long period of time, the adhesive will dry out in cold seasons such as winter or cold areas. There was a problem that it could not be bonded and fixed.
The present invention solves or improves these problems and provides a locking structure for a folded piece of a peripheral edge of a folding packaging box that can be locked without using an adhesive.

  In order to solve the above-mentioned problems, first of all, the present invention has a first aspect in which peripheral walls 3a, 3b, 4a, 4b that can be folded up and down are connected to each side of a square or rectangular top plate or bottom plate 2, and adjacent peripheral walls 3a. , 4a, 3b, 4b, a connecting piece 7a that is bent along the adjacent side of the other peripheral wall 3a, 4a, 3b, 4b and overlaps the inner surface of the other peripheral wall 3a, 4a, 3b, 4b. 7b, and flap-shaped folded pieces 17 and 22 folded along the inner surfaces of the peripheral walls 3a, 4a, 3b and 4b are connected to the upper ends of the adjacent peripheral walls 3a, 4a, 3b and 4b, respectively. At the same time, the upper ends of the connecting pieces 7a and 7b are held upright by the one folded piece 17, and the adjacent ends 21 and 23 of the folded pieces 17 and 22 are in a state where the folded pieces 17 and 22 are folded inward. The locking part for locking and fixing the adjacent In the folding packaging boxes provided in 21 and 23, when the folding pieces 17 and 22 are constituted by the locking side folding pieces 22 and the closing side folding pieces 17, and when the locking side folding pieces 22 are folded inside. Further, a floating assisting piece 26 that floats the end of the locking side folded piece 22 from the inner surfaces of the peripheral walls 4a and 4b so as to form a space 24 between the locking side folded piece 22 and the inner surfaces of the peripheral walls 4a and 4b. It is characterized by being provided on the locking side folded piece 22.

  Secondly, the levitation assisting piece 26 is composed of a tongue-like protrusion 28 projecting from the adjacent end 23 of the locking side folded piece 22, and the adjacent peripheral walls 3 a, 4 a, 3 b, 4 b are raised and locked. When the side folded piece 22 is folded inward, the tip of the protrusion 26 comes into contact with the inner surface side of the adjacent peripheral walls 3a, 3b and is locked by bending in a floating state from the corners of the peripheral walls 3a, 4a, 3b, 4b. The structure is characterized in that the end portion of the side folded piece 22 floats from the inner surfaces of the peripheral walls 4a and 4b.

  Third, when the peripheral walls 3a, 4a, 3b, 4b with which the levitation assisting pieces 26 are adjacent to each other are erected and the locking side folding pieces 22 are turned inside, at the adjacent ends 23 of the locking side folding pieces 22 The hook-side folded piece 22 is formed by a claw-like protruding portion 36 that is bent at a substantially right angle with respect to the locking-side folded piece 22 so that the end of the locking-side folded piece 22 floats from the inner surfaces of the peripheral walls 4a and 4b.

  Fourth, the levitating assisting piece 26 is formed of a folding flap 37 continuously connected to the tip of the locking side folding piece 22, and the adjacent peripheral walls 3 a, 4 a, 3 b, 4 b are erected to lock the locking side. It is characterized in that the end of the latching side folded piece 22 is floated from the inner surfaces of the peripheral walls 4a and 4b by further folding back to the inner surface side of the latching side folded piece 22 with the folded piece 22 folded inward.

According to the folding piece locking structure of the peripheral wall end for a folding packaging box of the present invention, it is possible to assemble a box without necessarily using an adhesive, and in this case, a part of the box assemble process can be omitted, so that the manufacturing cost In addition, the box can be assembled efficiently at the shop floor.
In addition, the front end of the protruding portion protruding from the adjacent end on the lower end side of the folded piece comes into contact with the adjacent peripheral wall in the standing state, and thereby the locking side folded piece folded back to the inner surface side of the peripheral wall; Since a space portion is formed between the two, a locking portion including a notch portion and a protruding portion provided at an adjacent end of the folded piece can be easily locked, and the locking state can be confirmed by sound. .
Further, there is an advantage that the folded pleated connecting piece can be suppressed by the protruding portion protruding from the adjacent end.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view after assembling the box, FIG. 2 is a perspective view showing the middle of the box assembly, and FIG.

  In the packaging box 1, front and rear walls 3a and 3b and left and right side walls 4a and 4b are connected to the bottom plate 2 so as to be foldable. Between the adjacent front and rear walls 3a and 3b and the left and right side walls 4a and 4b, intermediate ridges 6a and 6b are provided, and the adjacent front and rear walls 3a and 3b and the left and right side walls 4a and 4b are connected to each other. The fold-like connecting pieces 7a and 7b to be connected are connected so as to be bendable.

  The connecting pieces 7a and 7b are fixed portions 8a and 8b which are bonded and fixed in advance to the inner surfaces of the front and rear walls 3a and 3b via ridges 6a and 6b, and left and right side walls 4a and 4b via folds 6a and 6b. And movable parts 9a and 9b that are coupled so as to be able to be bent and rotated. A fixed portion 8a is formed on the front and rear walls 3a and 3b via a fold 6a on the connecting piece 7a connected to the left side wall 4a, and a movable pleat 11 extending toward the left side wall 4a is formed on the fixed portion 8a. Auxiliary folds 12 are formed, and the auxiliary folds 12 are curved in a mountain shape toward the movable portion 9a. A key-shaped cut 13 is formed in the direction of the bottom plate 2 below the movable fold 11, and a band protruding in the direction of the left side wall 4a on the inner surface development view of FIG. A portion 14 is formed.

  The connecting piece 7b that is connected to the right side wall 4b is bent to the right side wall 4b and a fixing part 8b that is bonded and fixed to the inner surfaces of the front and rear walls 3a and 3b in advance via a fold line 6b in the middle part. It is comprised with the movable part 9b connected so that rotation is possible. In the movable portion 9b, when the right side wall 4b in the folded state is erected and rotated, a fold line 16 is formed in the inner surface development view of FIG. 3 that assists the erection.

  Folding pieces 17 are connected to the upper ends of the front and rear walls 3a, 3b, and the upper ends of the connecting pieces 7a, 7b are folded and held in a standing upright state. It is comprised by the left-right movable part 19a, 19b provided in the upper end of the fixing | fixed part 18 so that bending was possible.

  Folding pieces 22 are continuously provided at the upper ends of the left and right side walls 4a and 4b in the standing state, and the adjacent ends 21 and 23 of the folding pieces 17 and 22 are in a state in which the folded pieces 17 and the folded pieces 22 are folded inward. A locking portion for locking and fixing is provided. The locking portion includes a protruding portion 21 a formed at the adjacent end 21 of each folded piece 17 and a notch portion 23 a formed at the adjacent end 23 of the folded piece 22.

  As will be described later, a floating auxiliary piece 26 is provided at the adjacent end 23 of the folded piece 22 so as to form a space 24 between the folded piece 22 and the left and right side walls 4a and 4b. ing. The levitation assisting piece 26 is a tongue-like protruding portion 27 projecting on the free end side of the adjacent end 23 of the turned-up piece 22 (lower end side when turned up to the inner surface of the peripheral wall in the standing state). In addition, a notch 27 a that assists the formation of the space portion 24 and serves as a rotation starting point of the protrusion 27 is formed at the base end of the protrusion 27. In addition, a fold 28 is formed slightly inward from the adjacent end 23 of the folded piece 22, and the fold 28 indicates the adhesion range of the adhesive as will be described later, and assists the formation of the space 24 by the protrusion 27. can do.

  Next, a procedure for assembling the packaging box 1 will be described with reference to FIGS. The main packaging box 1 having the above-described configuration is shipped in a flat state bonded in advance (see FIG. 4). The fixing portions 8a and 8b of the connecting pieces 7a and 7b are fixed to the inner surfaces of the front and rear walls 3a and 3b in advance by adhering 31b to the bonding margin 31a, and the folded pieces 17 from above the adhering and fixing connecting pieces 7a and 7b. The fixing portion 18 is folded inward, the fixing portions 8a and 8b of the connecting pieces 7a and 7b and the band portion 14 are pressed and clamped, and 32b is bonded and fixed to the bonding margin 32a. Simultaneously with the above operation, the folded piece 22 is also folded inward, and the bonding margin 33b on the inner surfaces of the left and right side walls 4a, 4b is bonded and fixed to the bonding margin 33a. At this time, care must be taken so that the adhesive does not exceed the fold 28 of the folded piece 22.

  As shown in the arrow of FIG. 4, the assembly work of the present packaging box 1 at the shop floor or the like pulls up the left side wall 4a in the upper left outer direction and simultaneously turns the right side wall 4b upright in the upper right outer direction. Since the front and rear walls 3a and 3b are connected to the left and right side walls 4a and 4b via connecting pieces 7a and 7b, the front and rear walls 3a and 3b can be raised at the same time as the right and left side walls 4a and 4b are raised. Moreover, since the fold 16 which assists standing is formed in the movable part 9b of the connection piece 7b, the right side wall 4b can be easily turned upright.

  At the same time that the left and right side walls 4a and 4b are opened to the outside, the left and right movable parts 19a and 19b of the folded piece 17 are kept upright on the peripheral side, and the movable parts 9a and 9b of the connecting pieces 7a and 7b are folded. The left and right movable portions 19a and 19b of the folded piece 17 are rotated to the inner surfaces on the front and rear walls 3a and 3b side.

  The connecting pieces 7a and 7b are folded and housed in an upright state by the left and right movable parts 9a and 9b of the folded piece 17, and the protruding portion 21a formed at the adjacent end 21 of the folded piece 17 and the adjacent end 23 of the folded piece 22 are provided. The box assembly is completed by being locked and fixed by a locking portion constituted by the notch portion 23a formed in the above. By using this locking structure, the peripheral wall can be easily erected and can be quickly assembled without using an adhesive at the shop floor or the like.

  Next, a method for forming the space 24 will be described with reference to FIG. In the flat plate state shipped as described above, the left side wall 4a and the connecting piece 7a and the folded piece 22 are in contact with each other (see FIG. 5A), and with the standing of the left side wall 4a from the flat plate state. Thus, the movable portion 9a of the connecting piece 7b bends in a direction perpendicular to the left side wall 4a.

  Then, the tip of the protrusion 27 of the levitation assisting piece 26 comes into contact with the inner surface of the movable part 9a of the connecting piece 7a bent in the direction perpendicular to the left side wall 4a, and the protruding part 27 is connected to the left side wall 4a and the connecting piece 7a. A space 24 is formed between the folded piece 22 and the inner surface of the left side wall 4a by bending in a floating state from a corner portion constituted by the movable portion 9a.

  Therefore, the space 24 is formed between the folded piece 22 and the inner surfaces of the left side walls 4a and 4b, so that a protruding portion 21a formed at the adjacent end 21 of the folded piece 17 is formed at the adjacent end 23 of the folded piece 22. It has the structure which can be latched to the notch 23a with one touch. Further, by using this locking structure to lock, the connecting pieces 7a and 7b in the folded upright state can be pressed and held without using an adhesive, and the standing of the peripheral wall can be easily held. Further, since the space portion 24 is provided, there is an advantage that the protruding portion 21a of the adjacent end 21 of the folded piece 17 inserted and locked at one end cannot be easily released.

  FIG. 6 is a perspective view showing a locking process of the locking portions provided at the adjacent ends 21 and 23 of the folded pieces 17 and 22 of the packaging box. The folded pieces 17 and 22 are respectively movable portions 19a of the folded pieces 17. Is constituted by a locking-side folded piece 22 and a locked-side folded piece 17 that latch the elastic return of the elastically upward. As shown in the figure, when the adjacent left side wall 4a and rear wall 3b are erected, the protruding portion 27 of the folded piece 22 comes into contact with the movable portion 9a of the folded connecting piece 7a, and is adjacent to the lower end side of the folded piece 22 A space 24 is formed between the end 23 and the left side wall 4a.

  Then, as shown by the arrow, the movable portion 19a of the folded piece 17 is folded back toward the rear wall 3b, and the protruding portion 21a formed to protrude from the adjacent end 21 is inserted into the notched portion 23a formed at the adjacent end 23 to be locked and fixed. To do. At this time, since it floats by the space portion 24 in which the adjacent end 23 on the lower end side of the folded piece 22 is formed, it can be easily locked and at the time of locking it can be confirmed by sound.

  7A to 7D show other examples of the floating assisting piece 26 for forming the space 24 between the left and right side walls 4a and 4b and the folded piece 22, and FIGS. In B) and (C), a flap 34 is connected to an adjacent end 23 on the lower end side of the folded piece 22 so as to be able to be folded, and the continuous base end portion of the flap 34 is folded at a substantially right angle with respect to the folded piece 22. Thus, claw-like projecting portions 36 projecting toward the inner surfaces of the left and right side walls 4a and 4b are formed uncut. (D) is a folded flap 37 continuously provided at the tip of the folded piece 22 as a floating auxiliary piece 26 so as to be foldable.

  In each example shown in FIGS. 7A to 7D, as shown in FIGS. 8A, 8B, and 8C, the flap 34 is bent at a substantially right angle with respect to the folded piece 22. The tip of the claw-like protrusion 36 is in contact with the inner surface of the left side wall 4a, and a space 24 corresponding to the protrusion height of the protrusion 36 is formed between the left side wall 4a and the folded piece 22. The claw-like protrusions 36 are formed at the upper end position (A), (B) center position, and (C) lower end position of the flap 34, respectively. In (D), the left side wall 4a is erected, and the folded piece 22 is folded back to the inner side of the folded piece 22 in a state where the folded piece 22 is folded inward. From the inner surface of 4a, a gap corresponding to the thickness of the flap 38 is formed and floated.

  The folding piece locking structure of the peripheral wall end for the folding packaging box of the present invention configured as described above has been described as a box body, but is not limited to the above-described aspect, and can be used as a lid body. May be a connecting piece that holds the peripheral wall upright, and may be a connecting flap that is foldably connected to an adjacent side of an adjacent peripheral wall. Also, other modes can be used as long as the floating assisting piece is a structure that floats the folded piece from the inner surfaces of the left and right side walls. Furthermore, since this packaging box is a symmetrical figure, it mainly demonstrated the left side wall and the rear wall, but the same applies to the right side wall and the front wall.

It is a perspective view which shows the box assembly completion state of this packaging box. It is a perspective view which shows the middle of the assembly of this packaging box. It is an inner surface expanded view of this packaging box. It is a top view which shows the folding state of this packaging box. (A) is a plane sectional view showing the formation state of the space portion in the folded piece locking structure of the packaging box, and (B) is a side sectional view. (A), (B) is a perspective view which shows the latching process of the latching | locking part provided in the adjacent end of the folding piece of this packaging box. (A)-(D) are inner surface expanded views which show the other example of the floating assistance piece of this packaging box. (A)-(D) are side surface sectional views which show the formation state of the space part by each levitation | floating auxiliary | assistance piece shown to FIG. 7 (A)-(D) of this packaging box.

Explanation of symbols

1 Packaging box 2 Bottom plate 3a Front wall (peripheral wall)
3b Rear wall (surrounding wall)
4a Left side wall (surrounding wall)
4b Right side wall (surrounding wall)
7a Connection piece 7b Connection piece 17 Folding piece 21 Adjacent end 22 Folding piece 23 Adjacent end 24 Space part 26 Lifting auxiliary piece 28 Projection part 36 Projection part 37 Flap flap

Claims (4)

  Peripheral walls (3a), (3b), (4a), (4b) that can be folded up and down on each side of a square or rectangular top plate or bottom plate (2), and adjacent peripheral walls (3a), (4a) , (3b), (4b) is bent along the adjacent side of the other peripheral wall (3a), (4a), (3b), (4b) to one of the adjacent sides of the other peripheral wall (3a) , (4a), (3b), (4b) connecting pieces (7a), (7b) that overlap with the inner surface, and adjacent peripheral walls (3a), (4a), (3b), (4b) Flap-shaped folded pieces (17), (22) folded along the inner surfaces of the peripheral walls (3a), (4a), (3b), (4b) are connected to the upper end, respectively, and the one folded piece In (17), the upper ends of the connecting pieces (7a), (7b) are held upright, and the folded pieces (17), (22) Folding provided with locking portions at the adjacent ends (21) and (23) for locking and fixing the adjacent ends (21) and (23) of the folded pieces (17) and (22) in a state of being folded inward. In the type packaging box, the folded pieces (17), (22) are constituted by a locking side folded piece (22) and a locking side folded piece (17), and the locking side folded piece (22) is arranged on the inner side. When folded, the end of the latching side folded piece (22) is formed so as to form a space (24) between the latching side folded piece (22) and the inner surfaces of the peripheral walls (4a), (4b). Folding piece locking structure of the peripheral wall end for a folding packaging box, in which a floating auxiliary piece (26) that floats from the inner surface of the peripheral walls (4a) and (4b) is provided on the locking side folding piece (22).   The levitation assisting piece (26) consists of a tongue-like protrusion (28) protruding from the adjacent end (23) of the locking side folded piece (22), and the adjacent peripheral walls (3a), (4a), ( 3b), when (4b) is erected and the locking side folded piece (22) is folded inward, the tip of the projection (26) abuts the adjacent peripheral wall (3a), (3b) on the inner surface side, The peripheral wall (3a), (4a), (3b), (4b) the end of the locking side folded piece (22) is levitated from the inner surface of the peripheral wall (4a), (4b) by bending in a floating state from the corner portion. 2. The folded piece locking structure of the peripheral wall end for a folding packaging box according to claim 1, which is a structure.   When the peripheral wall (3a), (4a), (3b), (4b) with which the levitation assisting piece (26) adjoins is raised and the locking side folded piece (22) is turned inward, the locking side At the adjacent end (23) of the folded piece (22), the end of the latched side folded piece (22) is bent at a substantially right angle with respect to the latched side folded piece (22) so that the end portions of the latched side folded piece (22) are peripheral walls (4a), (4b) The folded piece locking structure of the peripheral wall end for a folding packaging box according to claim 1, comprising a claw-like protrusion (36) that floats from the inner surface.   The levitation assisting piece (26) is composed of a folding flap (37) continuously connected to the tip of the locking side folding piece (22), and the adjacent peripheral walls (3a), (4a), (3b), (4b) is raised, and the latching side folded piece (22) is folded back to the inner side of the latching side folded piece (22) with the end of the latching side folded piece (22). The folding piece locking structure of the peripheral wall end for folding-type packaging boxes of Claim 1 which is a structure which floats a part from the inner surface of a surrounding wall (4a), (4b).

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