JP2003128045A - Corrugated cardboard with folding lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain an easy-assemble corrugated cardboard in a folded state and flatly. SOLUTION: The corrugated cardboard is easily assembled from the folded state by providing each pair of side face boards 1 and end face boards 2 and adhering bottom side boards 5 which are extended from the lower edge of the side face boards 1 to bottom side boards 6 which are extended from the lower edge of the end face boards 2 with adhesive pieces 8 having oblique creases 7 as the base ends. In the cardboard, a lock piece 13 and a lock hole 14 which can be engaged with each other in the folded state are provided in the opposed part in the vicinity of the top face. The elasticity of the crease in the folded state is suppressed by engaging them.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box of a simple assembly type used as a returnable box or the like. 2. Description of the Related Art Conventionally, as a cardboard box of this kind,
The one shown in FIG. 4 is used. In this cardboard box, a pair of side plates 1 and end plates 2 are connected in series, and a lid side plate 3 and a lid end plate 4 extend from an upper edge thereof, and a bottom side plate 5 and a bottom end plate 6 extend from a lower edge thereof. Have been. The bottom end plate 6 is provided with a sticking piece 8 having a diagonal line 7 as a base end, and the bottom side plate 5 and the bottom end plate 6 are stuck together through the sticking piece 8 to form a cardboard box. Can be easily assembled from the folded state as shown. [0004] However, in the above-mentioned cardboard box, since the fold at the bottom portion rebounds strongly in the folded state, the flat state is maintained unless binding is performed. There was a problem that could not be done. Accordingly, an object of the present invention is to provide a cardboard box of a simple assembly type which can be held flat in a folded state. [0006] In order to solve the above-mentioned problems, a simple assembling type corrugated cardboard box according to the present invention is provided with a locking means at an opposing portion near the top surface, and the locking means is used to fold the cardboard box. The rebound of the fold in the tatami state was suppressed. An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the blank of the corrugated cardboard box shown in FIG. 1, a pair of side plates 1 and end plates 2 are provided alternately and successively, and a lid side plate 3 and a lid end plate 4 are formed from an upper edge thereof, and a bottom side plate is formed from a lower edge thereof. 5
And the bottom end plate 6 are respectively extended. One bottom plate 5 extends so as to cover substantially the entire bottom surface of the box, and each bottom end plate 6 is provided with a sticking piece 8 having a diagonal line 7 as a base end. Further, on the outer edge of the one side plate 1, a passage piece 9 is provided. [0010] In addition, a tongue piece 10 protrudes from the distal end edge of one of the lid side plates 3. The lid side plate 3 has a mountain fold line 11 extending straight to the center of the tongue piece 10, and a tongue piece from its base end. 1
A valley fold line 12 extending to both ends of 0 is formed. The lid side plate 3 is tapered toward the ridge with the side plate 1 and has a tapered lock piece 13 having a step at the base end.
Are formed by cutting, and a lock hole 14 is formed by cutting at the base of the other lid side plate 3. In order to assemble and use such a blank, as shown in FIG. 2, each of the pair of side plates 1 and the end plates 2 is bent and connected by a joint piece 9, and the bottom side plate 5 and the bottom end plate 6 are connected. Are bonded together via a bonding piece 8. In order to seal the cardboard box after storing the articles, one of the lid side plates 3 having the tongue pieces 10 is bent, and both the lid end plates 4 are stacked on the lid side plate 3. Is bent, and the tongue piece 10 is released and engaged with the lid side plate 3. With this sealing, the cardboard can be opened simply by pushing the tongue piece 10 in, and unlike the sealing with an adhesive tape or a staple, the cardboard is not damaged at the time of opening.
This cardboard box can be used over and over again. After the articles are taken out, in order to fold the cardboard box, as shown in FIG. 3, each pair of side plates 1 and end plates 2 are crushed. Accordingly, the bottom side plate 5 and the bottom end plate 6 are bent upward, and the sticking pieces 8 are
Is folded along. In such a folded state, the lock piece 1
When the lock piece 3 is pushed into the lock hole 14, the step at the base end of the lock piece 13 engages with the side edge of the lock hole 14, the rebound of the fold at the bottom portion is suppressed, and the cardboard box is kept flat. . Therefore, the cardboard box can be transported and stored in a bulky state without stringing or the like, and when used as a returnable box, the efficiency of distribution can be improved. In addition, since the outer shape of the blank is the same as that of the conventional simple assembling box, the cardboard box can be manufactured at low cost without greatly changing the process. As described above, the cardboard box according to the present invention is provided with the lock means at the opposed portion near the top surface, and the lock means suppresses the rebound of the fold in the folded state. Therefore, it can be transported and stored in a flat, unfolded, bulky state, which is suitable for a returnable box.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a blank of a cardboard box with a fold lock according to the present invention. FIG. 2 is a perspective view showing an assembled state of the same. FIG. 3 shows a fold locked state of the same. FIG. 4 is a perspective view showing a folded state of a conventional cardboard box. [Description of References] 1 Side plate 2 End plate 3 Cover side plate 4 Cover end plate 5 Bottom plate 6 Bottom plate 7 Bottom plate 7 Oblique line 8 13 Lock piece 14 Lock hole

Claims (1)

Claims 1. A pair of side plates 1 and an end plate 2 are provided in series, and a bottom plate 5 extending from a lower edge of the side plate 1 and an end plate 2 are provided.
The bottom end plate 6 extending from the lower edge of the cardboard box is bonded via a sticking piece 8 having the inclined line 7 as a base end, so that the cardboard box can be easily assembled from the folded state. A cardboard box with a foldable lock, wherein a lock means for engaging in a folded state is provided in an opposing portion near the surface.