JP3203215U - Easy opening cardboard box - Google Patents

Abstract

An easy-to-open cardboard box that can be opened very easily regardless of the thickness of the cardboard sheet for producing the cardboard box. A wrap-around cardboard box 10 having outer sealing flaps 11a and 11b coupled in at least three directions of a top plate 11 and sealed at the front end of the top plate 11 is provided. The stop outer flap 11a has a thin portion Q that forms a gap with the side plate 14. [Selection] Figure 1

Description

  The present invention relates to a cardboard box that can be easily opened.

Conventionally, a rectangular parallelepiped box is generally used as a cardboard box used for packaging, transportation, and storage of various products. As one type of such a rectangular parallelepiped cardboard box, a wrap-around type cardboard box is widely used in which a sealing outer flap coupled to a top plate is attached to the outside of a side plate and packed.
However, the wrap-around type corrugated cardboard box has a problem that it is difficult to peel off the sealing outer flap from the side plate because the sealing outer flap and the side plate are firmly attached with an adhesive. was there.

In order to solve this problem, if the outer flap for sealing and the side plate are point-bonded, and the upper part of the side plate is lightly pushed inward when opened, a gap is widened between the central area of the outer flap for sealing and the side plate Therefore, a technique for peeling the outer flap for sealing from the side plate by inserting a finger into the gap and pulling it up has already been reported (for example, see Patent Document 1).
However, when packing a relatively large heavy load, a thick cardboard sheet is used. Depending on the above technique, even if the upper part of the side plate is lightly pushed inward at the time of opening, as shown in FIG. Since it is difficult to form a gap between the outer flap and the side plate, it has been difficult to peel off the sealing outer flap from the side plate for opening.

Moreover, in order to make it easy to peel off and open the outer flap for sealing, there is also reported one in which an upper flap and a lower flap formed with a protruding knob are partially polymerized (for example, Patent Document 2). reference).
However, since this technique requires that the corrugated cardboard sheet be punched into a partially protruding shape, it is inevitable that the manufacturing cost will be high, and it is accompanied by the occurrence of a step in the overlapping portion of the upper flap and the lower flap. The situation was that flap gluing was difficult.

Japanese Utility Model Publication No. 4-68818 JP-A-9-207931

  The present invention has been made in view of the conventional problems and circumstances as described above, and can be opened very easily by general die cutting and gluing regardless of the thickness of the corrugated cardboard sheet for producing the corrugated cardboard box. It is an object to provide a cardboard box that can perform a demonstration work.

  As a result of intensive studies to solve the above problems, the inventor has provided a thin portion in a part of the outer flap for sealing of the wraparound cardboard box, and the thin portion and the side plate We found that a gap was always formed between the two and completed the present invention.

  That is, the present invention is a wrap-around type corrugated cardboard box having a sealing outer flap coupled to at least three directions of the top plate, and is connected to the front end of the top plate. In addition, the above-mentioned problems are solved by an easy-open cardboard box characterized by having a thin portion that forms a gap with the side plate.

According to the present invention, due to the difference in thickness between the thick part and the thin part in the outer flap for sealing, regardless of the thickness of the corrugated cardboard sheet used between the outer flap for sealing and the side plate, it is always Since the gap is formed, by inserting a finger into the gap and pulling it up, the entire top plate can be opened while the sealing outer flap is peeled off from the side plate very easily.
In addition, the present invention forms a finger insertion gap as described above without providing a special knob, so that the cardboard sheet can be cut and glued and assembled in the same manner as before to efficiently and inexpensively. An easy-to-open cardboard box can be manufactured and provided.

The perspective explanatory view of the easy-to-open cardboard box of the present invention according to the first embodiment. Explanatory drawing of expansion | deployment of this invention easy-opening cardboard box which concerns on 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged cross-sectional explanatory view of a main part of an easy-to-open cardboard box of the present invention according to a first embodiment. The perspective explanatory view of this invention easy-opening cardboard box concerning a 2nd embodiment. Explanatory drawing of expansion | deployment of this invention easy-opening cardboard box which concerns on 1st Embodiment. The principal part expanded sectional explanatory drawing of the conventional cardboard box.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 show a first embodiment of the present invention, wherein 10 is a wrap-around cardboard box, 11 is its top plate, and 12 is coupled to the top plate 11 via a folding line L. The side plate 13 is a bottom plate coupled to the side plate 12 via the folding line L, and 14 is a side plate coupled to the bottom plate 13 via the folding line L. In addition, sealing top flaps 11a, 11b, and 11c are coupled to the top plate 11 via a fold line L. Further, the side plates 12 are coupled with sealing inner flaps 12 a and 12 b via a folding line L. In addition, sealing bottom flaps 13a and 13b are coupled to the bottom plate 13 via a folding line L. Further, inner side flaps 14 a and 14 b are coupled to the side plate 14 via a folding line L.

As shown in FIG. 3, a thin portion Q that forms a gap P with the side plate 14 is formed on the sealing outer flap 11 a that is coupled to the front end portion of the top plate 11. As a specific forming portion of the thin portion Q, the central region of the longitudinal end edge of the sealing outer flap 11a is particularly advantageous in terms of efficient opening operation with a finger. Further, the specific size and shape of the thin portion Q is not particularly limited, but is semicircular with a radius of about 0.5 to 25 mm, or a depth of about 0.5 to 25 mm, and a width of 0.5 to 120 mm. Those having a bathtub cross-sectional shape of a certain degree are particularly advantageous in terms of finger insertion.
In addition, the thin part Q is constituted by a press processing part of a corrugated cardboard sheet used for assembling a wrap-around type corrugated cardboard box, and the thin part can be formed by using corrugated cardboard crease pressing. This is particularly advantageous in terms of efficiency.

  Further, the edge of the thin portion Q has a semicircular shape with a radius of 0.3 to 15 mm, or a bathtub cross-sectional shape with a depth of about 0.3 to 15 mm and a width of about 0.5 to 100 mm. Forming the finger locking cutout R is particularly advantageous in terms of finger locking.

  At the boundary between the top plate 11 and the sealing outer flaps 11b and 11c coupled to both sides of the top plate 11, as shown in FIG. 15 is formed.

  In order to obtain an easier peeling action, it is advantageous that the outer flap 11a for sealing is point-bonded to the side plate 14 in both end regions excluding the thin portion Q.

  According to the first embodiment, as shown in FIG. 3, the gap P between the thin plate Q and the thick plate in the other region is separated from the side plate 14 by the difference in thickness between the thin plate Q and the thick plate in the other region. Therefore, if the outer flap 11a for sealing is pulled upward while the finger is inserted into the gap P and the finger pad is locked to the excision R, the outer flap 11a for sealing is removed from the side plate 14. Is peeled off, and then the top plate breaking line 15 is cut off, so that the top plate 11 can be fully opened.

  FIGS. 4 and 5 show a second embodiment of the present invention, and are for sealing that are coupled to both sides of the top plate 11 of the wrap-around type cardboard box 10 in the first embodiment. The outer flaps 11b and 11c also have thin portions Q similar to those of the first embodiment, in which gaps P are formed between the sealing inner flaps 12a and 14a and the sealing inner flaps 12b and 14b, respectively. In addition, a finger-removing cutout portion R similar to that of the first embodiment is formed on the edge portion of the thin portion Q. The sealing outer flaps 11b and 11c are also point-bonded to the sealing inner flaps 12a and 14a and 12b and 14b, respectively, as in the first embodiment. In this embodiment, the top panel break line 15 in the first embodiment is not particularly required.

  According to the second embodiment, any of the three sealing outer flaps 11a, 11b, and 11c of the top plate 11 can be easily peeled off, so that the top plate 11 can be exhibited very easily. Can do.

10: Wrap-around type cardboard box 11: Top plate 11a, 11b, 11c: Outer flap for sealing 12: Side plate 12a, 12b: Inner flap for sealing 13: Bottom plate 13a, 13b: Outer flap for sealing 14: Side plate 14a 14b: Inner flap for sealing 15: Breaking line for opening the top plate P: Gap Q: Thin portion R: Cut portion for finger locking L: Folding line

Claims (9)

  A wrap-around type corrugated cardboard box provided with sealing outer flaps coupled to at least three directions of the top plate, between the side flaps and the sealing outer flap coupled to the front end of the top plate An easy-to-open cardboard box, characterized in that it has a thin portion that forms a gap.   2. The easy-open cardboard box according to claim 1, wherein the outer flap for sealing coupled to both sides of the top plate also has a thin portion that forms a gap with the inner flap for sealing.   The easy-open cardboard box according to claim 1 or 2, wherein the thin portion is formed in a central region of the longitudinal end edge of the outer flap for sealing.   The thin portion has a semicircular shape having a radius of 0.5 to 25 mm, or a bathtub cross-sectional shape having a depth of 0.5 to 25 mm and a width of 0.5 to 120 mm. The easy-opening cardboard box according to any one of the preceding claims.   The easy-to-open cardboard box according to any one of claims 1 to 4, wherein the thin portion has a finger locking cutout portion at an end edge portion thereof.   The finger locking excision part has a semicircular shape with a radius of 0.3 to 15 mm, or a bathtub cross-sectional shape with a depth of 0.3 to 15 mm and a width of 0.5 to 100 mm. The easy-open cardboard box according to any one of 1 to 5.   The easy-to-open cardboard box according to any one of claims 1 to 6, wherein the thin portion comprises a cardboard sheet press processing section.   The easy outer sealing flap according to any one of claims 1 to 7, wherein the outer flap for sealing is point-bonded to the side plate or the side plate and the inner flap for sealing in both end regions excluding the thin portion. Open cardboard box.   2. The easy-open cardboard box according to claim 1, further comprising a break line for opening the top plate at a boundary portion between the top plate and the sealing outer flap formed on both sides of the top plate.

Images