JP3217601U - Packaging box - Google Patents

Abstract

An assembly box body made of corrugated cardboard is formed by bending up a side plate and an end plate that are continuous with a bottom plate to form an outer wall and opening upward, and the box extends from the upper edge of the end plate continuously to the end plate. Equipped with a reinforcing part that consists of an upper edge plate that bends inward, a side reinforcement plate that is folded along both sides of the upper edge plate along the side plate, and is connected to the lower edge of the side plate. Provided is a packaging box that is easy and does not easily come off the connection point. The connecting structure between the lower edge of the side plate and the side reinforcing plate corresponds to a connecting projection formed by projecting from the lower side of the side reinforcing plate and the connecting projection bent to the bottom plate side. And a connection receiving portion 7 formed on the bottom plate. The connection receiving portion includes an insertion hole 71 provided on the side plate side of the bottom plate and a holding flap 72 formed by providing a cut in the width of the insertion hole, and the connection protrusion 6 is disposed on the upper surface of the holding flap 72. It is installed. [Selection] Figure 4

Description

  The present invention relates to a packaging box assembled from a development board of cardboard paper.

  Corrugated cardboard packaging boxes that mainly store and transport fruits and vegetables are assembly boxes that have an outer wall on the four sides of the bottom plate and open at the top, and are reinforced especially on the end face side that constitutes the outer wall to increase durability The thing which has provided the part is known.

  The reinforcing part is connected to the upper edge plate that is bent inward of the box from the upper edge of the end face plate continuously with the end face plate, is folded along the side plate on both sides of the upper edge plate, and is connected at the lower edge of the side plate. It is comprised by the side reinforcement board (patent documents 1, 2).

Japanese Utility Model Publication No. 2-33255. Japanese Patent Laid-Open No. 2005-1509.

  The connection between the side reinforcing plate and the side plate lower edge portion in the packaging box provided with the reinforcing portion constituted by the upper edge plate and the side reinforcing plate continuous with the end face plate is in the insertion slot provided in the side plate lower edge, It is connected by inserting an insertion protrusion provided at the tip of the side reinforcing plate, but if the insertion protrusion is reduced and the insertion groove hole is enlarged, the insertion operation is easy, but it can be removed immediately. Therefore, the insertion protrusion is formed in a bulging engagement shape (the neck portion is made to coincide with the width of the insertion groove hole, and a locking bulging portion is provided) so that it is difficult to come off. For this reason, a strong insertion force is required, and the connecting operation (box assembly operation) becomes cumbersome.

  In view of this, the present invention proposes a packaging box having a novel structure in which the connecting operation of the reinforcing side plates is easy and the connecting portion is difficult to come off.

  A packaging box according to claim 1 of the present invention is a corrugated cardboard assembly box body which is formed by bending up a side plate and an end plate that are continuous with a bottom plate to form an outer wall and opening upward. A reinforcing portion comprising: an upper edge plate that is continuously bent from the upper edge of the end face plate to the inside of the box; and a side reinforcing plate that is folded on both sides of the upper edge plate along the side plate and connected to the lower edge of the side plate. In the packaging box provided with a connecting projection between the lower edge of the side plate and the side reinforcing plate, the connecting projection protruding from the lower side of the side reinforcing plate, and when the connecting projection is bent toward the bottom plate The corresponding bottom plate is composed of an insertion hole provided on the side plate side and a connection receiving portion made of a holding flap formed by providing a cut in the width of the insertion hole, and the connection protrusion is held on the upper surface of the flap. It is characterized by being arranged.

  Thus, the connection between the side reinforcing plate and the side plate lower edge portion that enhances the stacking durability is not pushed in the lateral direction of the side plate into the insertion hole, but is pushed up from the bottom of the bottom plate toward the connection receiving portion. Then, the connecting projection is positioned above the restraining flap, the joining projection and the restraining flap are integrated in a stacked state, and the connection is made by a simple operation.

  In the packaging box according to claim 2 of the present invention, in particular, the connecting projection protrudes from a broken line that has moved upward by the thickness of the corrugated cardboard from the lower edge of the side reinforcing plate matched with the height of the side plate, The width is appropriately formed in the protruding direction from the broken line, and the width is made to coincide with the connection receiving portion, and the protruding tip is formed wider than the width of the connection receiving portion.

  Therefore, the folded surface of the connecting projection (when connected) matches the design of the bottom plate (restraining flap) and the stack of the connecting projection and the retaining flap is in close contact, and the wide portion of the connecting projection (engagement) Since the stop portion protrudes beyond the width position of the insertion hole and the holding flap, the connection protrusion and the connection receiving portion are firmly integrated.

  According to a third aspect of the present invention, there is provided a packaging box having an inner folding flap on both sides of a side plate to form an outer wall, and an upper protruding side at a corner of the side plate and the inner folding flap. The corner portion of the sheet is cut out by the thickness of the paper and fitted inside the protruding side, and the side plate (upward protruding side) is sandwiched between the cut end surface of the upper edge plate and the side reinforcing plate. This increases the fastness of the entire box.

  The packaging box according to claim 4 of the present invention is provided with a holding part protruding above the upper edge of the box on the side plate, and an end edge of the holding part extending up to the upper edge plate. A latching groove is formed at a position corresponding to the front edge on both sides of the upper edge plate, and the front edge on both sides of the upper edge plate is fitted into the latching groove. When the edge plate is bent forward, the front edge of both sides is engaged with the retaining groove, so that the bent state of the upper edge plate is maintained and the side reinforcement plate is bent without holding the upper edge plate. In addition, the connecting operation of the connecting protrusion and the connecting receiving portion can be performed with both hands. Of course, the overall fastness of the box is also increased.

  The packaging box according to claim 4 of the present invention is formed by folding an intermediate portion of the upper edge plate inward of the box and providing an end face reinforcing plate reaching the bottom plate, and the end face portion is formed on a double wall. The lamination strength is increased.

  As described above, the structure of the present invention comprises a connection structure at the lower edge portion of the side reinforcing plate and the side plate, with a connection protrusion made up of a connection protrusion and an insertion hole and a holding flap provided in the bottom plate, The connecting protrusions are connected by pushing up, and the assembly work of the packaging box is facilitated.

1 is an overall perspective view of a first embodiment of the present invention. The principal part perspective view (corner part inward view). The figure (upper corner view). Explanatory drawing in the middle of the assembly. The same development view. The whole perspective view of the second embodiment. FIG. The same development view.

  Next, an embodiment of the present invention will be described. The first embodiment shown in FIGS. 1 to 5 is a packaging box formed by assembling a single development board of corrugated cardboard, and a side plate 2 and an end plate 3 that are continuous with the bottom plate 1 are bent upright to form an outer wall. The upper edge plate 4 that is formed and bent inward of the box from the upper edge of the end face plate 3 is formed continuously with the end face plate 3, and both sides of the upper edge plate 4 are folded along the side face plate 2. A side reinforcing plate 5 connected at an edge portion is provided.

  The side surface plate 2 is connected to the bottom surface plate 1 via a fold line 2a, and includes a holding portion protruding above the side surface upper edge 21 that matches the height of the box (the upper box when the assembly boxes are stacked). 22), and inner folding flaps 23 that are folded inwardly of the end face plate 3 via folding lines 2b are provided on both sides of the side plate 2 so as to be provided between the side plate 2 and the inner folding flap 23. An upper protruding side 24 protruding from the upper side edge 21 by the paper thickness is provided in an appropriate range (a corner portion of the box) straddling the broken line 3b.

  Furthermore, both end portions of the holding portion 22 extend to above the front end portions on both sides of the upper edge plate 4 when the upper edge plate 4 is bent inward of the box. A latching groove 25 is formed at a position corresponding to the front ends of both sides.

  The end face plate 3 is connected to the bottom plate 1 through a broken line 3a, the upper edge plate 4 is connected to the upper edge (via the bent line 3b) with an appropriate width, and a handle hole 31 is formed in the center portion. It becomes.

  The side reinforcing plate 5 is provided on the left and right sides of the upper edge plate 4 via a folding line 4a according to the height of the assembly box, and is provided with a connecting projection 6 on the lower edge when folded.

  Further, at the corners of the fold lines 3b, 4a of the upper edge plate 4, a cut portion 41 having a paper thickness in a range corresponding to the upper protruding side 24 is provided.

  The connecting protrusion 6 is formed so as to protrude from the lower side of the side reinforcing plate 5, and particularly protrudes from a fold line 6 a that moves upward by the paper thickness from the lower edge of the side reinforcing plate that matches the height of the side plate 2. A locking portion 61 is provided in the protruding direction from the broken line 6a so as to coincide with the connecting receiving portion 7 described below, and the protruding tip is wider than the width of the connecting receiving portion 7.

  The connection receiving portion 7 is provided on the bottom surface plate 1 (partial side surface plate 2) when the connection protrusion 6 is bent downward from the bottom surface plate 1, and is composed of an insertion hole 71 and a holding flap 72. Is done. The insertion hole 71 corresponds to the width of the connecting projection 6 (the width excluding the locking portion 61), enters the side plate 2 by the paper thickness from the fold line 2 a, and the bottom plate 1 in the range of about half of the connecting projection 6. The holding flap 72 is formed by a notch 73 cut into the bottom of the bottom plate 1 with the width of the insertion hole 71, and the protrusion length of the connecting protrusion 6 together with the insertion hole 71. It is made to correspond.

  The assembly process of the packaging box from the unfolded plate shown in FIG. 5 will be described. Like the conventional packaging box, the side plate 2 is raised, the inner folding flap 23 is bent, and the end face plate 3 is further raised (FIG. 5). 4) The upper edge plate 4 is bent inward of the box, and the cut portions 41 of the upper edge plate 4 are fitted inside the upper projecting side 24, and at the same time, the front edge on both sides of the upper edge plate 4 is hooked into the recessed groove 25. To fit. As a result of the above-mentioned fitting, a box body having outer walls (side plate 2 and end plate 3) around the bottom plate 1 and an upper edge plate 4 laid between the side plates 2 is once formed.

  Thereafter, the side reinforcing plate 5 is bent along the side plate 2, and the connecting projection 6 and the connection receiving portion 7 are connected.

  The connection protrusion 6 and the connection receiving part 7 are connected by bending the connection protrusion 6 from the fold line 6 a toward the bottom of the bottom plate 1, pushing up the holding flap 72 of the connection receiving part 7, and holding down the connecting protrusion 6. It is performed by being located above, and a packaging box is assembled by this.

  In particular, the heights of the connecting projection 6 and the holding flap 72 coincide with each other in design, so that in the assembled state, the stacked layers of the connecting projection 6 and the holding flap 72 are in close contact, and the locking portion 61 protrudes from the holding flap 72. Therefore, the connection protrusion 6 and the connection receiving part 7 are firmly integrated without the connection protrusion 6 pressing down the flap 72 by pushing down and separating from the connection reception part 7.

  6 to 7 show a second embodiment of the present invention, which is an example in which the upper edge plate 4 of the first embodiment is changed.

  The upper edge plate 4A of the second embodiment is formed in a triangular shape (or a quarter circle shape) only at the corner portions, and the upper end surface portion 8 is flush with the left and right upper edge plates 4A. The end face reinforcing plate 9 is bent from the upper end face portion 8 to the inside of the box.

  The end face reinforcing plate 9 is bent to form a double wall structure with the end face plate 3, and the bent lower edge abuts against the bottom plate 1 and latches into the mounting hole 11 provided in the bottom plate 1. A protrusion 91 is provided.

  Further, a gripping portion for a handle (which is a through-hole in the development plate) 81 is formed on the upper edges of the end face plate 3, the upper end face portion 8 and the end face reinforcing plate 9.

  Thus, the packaging box is assembled in the same manner as in the first embodiment, and the end surface portion is formed in a double wall, so that the lamination strength can be increased.

DESCRIPTION OF SYMBOLS 1 Bottom plate 11 Mounting hole 2 Side plate 21 Side upper edge 22 Holding part 23 Inner folding flap 24 Upper protrusion side 25 Stopping groove 3 End face plate 31 Handle hole 4, 4A Upper edge board 41 Cut part 5 Side reinforcement board 6 Connecting projection 61 Locking portion 7 Connection receiving portion 71 Insertion hole 72 Holding flap 73 Notch 8 Upper end surface portion 81 Hand grip portion 9 End surface reinforcing plate 91 Locking projection portion

Claims (5)

  A side wall plate and an end surface plate that are continuous with the bottom surface plate are bent upright to form an outer wall, and the upper side is an assembly box made of corrugated cardboard, and is continuous with the end surface plate from the upper edge of the end surface plate to the inside of the box In a packaging box having a reinforcing portion comprising a bent upper edge plate, and both sides of the upper edge plate are folded along the side plate and connected to the lower edge of the side plate, the lower edge of the side plate The difference between the side projection plate and the side reinforcement plate on the side plate is connected to the connection projection that protrudes from the lower side of the side reinforcement plate and the bottom plate that corresponds to the connection projection when the connection projection is bent to the bottom plate side. A packaging box comprising: a receiving hole made of a holding flap formed by providing a cut in the width of the insertion hole and the insertion hole, and the connecting protrusion is arranged on the upper surface of the flap.   The connecting protrusion protrudes from a broken line moved upward by the thickness of the corrugated cardboard from the lower edge of the side reinforcing plate matched with the height of the side plate, and is appropriately aligned with the connecting receiving part in the protruding direction from the bent line. The packaging box according to claim 1, wherein the packaging box is formed to have a width, and the protruding tip is formed wider than the width of the connection receiving portion.   An inner folding flap is provided on both sides of the side plate to form an outer wall, an upper protruding side is provided at a corner portion of the side plate and the inner folding flap, and a corner portion of the upper edge plate is cut by a thickness of the paper to The packaging box of Claim 1 or 2 formed by fitting inside.   The side plate is provided with a holding portion that protrudes upward from the upper edge of the box, and the edge of the holding portion extends to the upper edge plate, and is hooked at a position corresponding to the front ends on both sides of the upper edge plate of the extended portion. The packaging box according to any one of claims 1 to 3, wherein a retaining groove is formed, and both front ends of the upper edge plate are fitted into the retaining groove.   The packaging box according to any one of claims 1 to 4, wherein an end face reinforcing plate reaching the bottom plate is provided by folding an intermediate portion of the upper edge plate inward of the box.