Duanboer box lid retainer

Abstract

To provide a cardboard box lid opening holder that is unlikely to slip off even when attached to the corner of the cardboard box for a long period of time. [Solution] A lid-opening holder 1 for cardboard boxes keeps the lid open by folding the top lid piece of the cardboard box outward and clamping it together with the side panels at the corners of the cardboard box, and is equipped with a pair of side walls 2, 3 that are erected opposite each other in a roughly L-shape when viewed from above, and a top wall 4 that connects the upper edges of the pair of side walls, and a thin ridge 5 that extends vertically on the inner surface of at least one of the pair of side walls, with the upper and lower edges of the thin ridge 5 connected so as to smoothly continue onto the inner surface.

Description

[Technical Field]

[0001] This invention relates to a cardboard box lid holder that folds the top lid of a cardboard box outward and holds it together with the side panels at the corners of the cardboard box to keep the lid open. [Background technology]

[0002] With a typical cardboard box, even if you try to fold the top lid piece outward and hold it in place along the side panel, the thickness and tension of the cardboard material act as a restoring force on the top lid piece, so unless you apply a force from outside to counter this, the top lid piece cannot be held in place along the side panel.

[0003] To solve this problem, Japanese Utility Model Laid-Open Publication No. 64-9126 proposes a corner clipper for corrugated cardboard box lids, which consists of two clamping bodies with a roughly U-shaped cross section connected together at a right angle in plan view. According to this device, the corner clipper is inserted from above into the corner of a corrugated cardboard box where the top lid piece is folded outward and aligned with the side panel, thereby clamping the top lid piece together with the side panel, thereby holding the top lid piece aligned with the side panel.

[0004] However, this device is constructed by connecting the inner pieces of two clamping bodies, each of which has an approximately C-shaped cross section and consists of an inner piece, an outer piece, and a connecting piece, with a connecting piece, and the outer pieces are not connected to each other and are independent of each other, so there is a problem that the resistance to the restoring force of the folded top cover is weak.

[0005] In this regard, Japanese Utility Model Application Laid-Open Publication No. 1-176027 proposes a device for a lid holder for a box-shaped container, in which the outer pieces of a pair of bifurcated holders (corresponding to the "two clamping bodies" in the device relating to the above-mentioned Japanese Utility Model Application Laid-Open Publication No. 64-9126) are connected with a connecting part that is L-shaped in plan view. According to this device, because the outer pieces of the pair of bifurcated holders are connected with each other, when the restoring force of the top lid is applied to the outer piece of one bifurcated holder, that restoring force is transmitted to the outer piece of the other bifurcated holder, and can cooperate with the other bifurcated holder to resist the restoring force of the top lid acting on the outer piece of one bifurcated holder, and the resistance to the restoring force of the folded-back top lid is increased to a certain extent.

[0006] However, the pair of forked holding parts are constantly subjected to the restoring force of the top cover piece, and because the surface of the cardboard material is slippery, over time the position of the pair of forked holding parts that clamp the side panel and top cover piece gradually shifts and moves upward, eventually causing them to come off the corner of the cardboard box. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Utility Model Application Publication No. 64-9126

[0008] [Patent Document 2] Japanese Utility Model Application Publication No. 1-176027 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0009] The object of this invention is to provide a cardboard box lid opening holder that is unlikely to slip off even when attached to the corner of the cardboard box for a long period of time while clamping the top lid piece folded outward together with the side panel. [Means for solving the problem]

[0010] The cardboard box lid opening holder of this invention is a cardboard box lid opening holder that holds the lid open by folding the top lid piece of the cardboard box outward and clamping it together with the side panels at the corners of the cardboard box, and is equipped with a pair of side walls that are erected opposite each other in a roughly L-shape when viewed from above, and a top wall that connects the upper edges of the pair of side walls, and a thin ridge that extends vertically on the inner surface of at least one of the pair of side walls, with the upper and lower edges of the thin ridge connected so as to smoothly continue onto the inner surface.

[0011] The thin ridges may be formed on the inner surface of at least one of the pair of side walls, but may also be formed on the inner surface of each of the side walls. When the thin ridges are formed on the inner surface of each of the pair of side walls, it is preferable that the thin ridges are formed so as to face each other (claim 2).

[0012] The thin ridges can also be formed at a predetermined distance from the lower edge of the inner surface of the side wall on which the thin ridges are formed (claim 3). [Effects of the Invention]

[0013] According to this device, a cardboard box opener retainer holds a cardboard box in an open position by folding the top flap of the cardboard box outward and clamping it together with the side panels at the corners of the cardboard box. The device includes a pair of side walls that are erected facing each other in a generally L-shape in a plan view, and a top wall connecting the upper edges of the pair of side walls. At least one of the pair of side walls has a vertically extending thin ridge on its inner surface. When the top flap is attached to the corner of the cardboard box in an outwardly folded state and clamped together with the side panels to hold the cardboard box open, the thin ridge acts as a non-slip surface, even on slippery surfaces like cardboard, preventing the top flap from gradually shifting out of position due to the restoring force of the top flap. Furthermore, because the thin ridge extends vertically, the side walls have a shape similar to a vertical rib, which strengthens the resistance to the restoring force of the top flap that acts in a direction that pushes the pair of side walls outward. Therefore, the effect is obtained that the top cover piece folded outward is unlikely to come off even when it is attached to the corner of the cardboard box for a long period of time while being sandwiched together with the side panel.

[0014] Furthermore, the upper and lower edges of the thin ridges are connected to the inner surface so as to be smoothly continuous, so that when attaching or detaching to or from the corner of the cardboard, there is no risk of the cardboard getting caught on the upper or lower edges of the thin ridges formed on the inner surface of the side wall, and it can be attached or detached smoothly.

[0015] According to the invention of claim 2, thin protrusions are formed facing each other on the inner surface of each of the pair of side walls, so that the upper cover piece and the side plate are tightly sandwiched between the facing thin protrusions, further enhancing the anti-slip effect of the thin protrusions.

[0016] According to the invention of claim 3, a thin protrusion is formed at a predetermined distance from the lower edge of the inner surface of the side wall, so that when attaching to the corner of the cardboard, the thin protrusion formed on the inner surface of the side wall does not get in the way and can be attached smoothly. [Brief explanation of the drawings]

[0017] [Figure 1] A perspective view showing the outline of the invention. [Figure 2]Also front view [Figure 3] Also bottom view [Figure 4] A diagram showing the same state of use DETAILED DESCRIPTION OF THE INVENTION

[0018] 1 to 4 are diagrams showing an outline of an embodiment of the cardboard box lid opening holder of the present invention.

[0019] The cardboard box lid-opening holder 1 is made of elastic synthetic resin and has a generally inverted U-shaped vertical cross section that opens downwards, with a top wall 4 spanning the upper edges of an outer wall 2 and an inner wall 3 that are erected opposite each other and form a generally L-shape in plan view. The inner surface 21 of the outer wall 2 and the inner surface 31 of the inner wall 3 face each other with a gap large enough to allow the insertion of two sheets of corrugated cardboard, the material used for general cardboard boxes.

[0020] This cardboard box lid-opening holder 1 is made up of two regions bounded by a corner that is roughly L-shaped in plan view, and in each region, thin ridges 5 are formed facing each other near the approximate horizontal center of the inner surface 21 of the outer wall 2 and the inner surface 31 of the inner wall 3, extending vertically at a predetermined interval from the lower edges of the inner surfaces 21, 31. These thin ridges 5 are tapered so that the upper and lower edges are smoothly connected to the inner surfaces 21, 31, respectively.

[0021] 4 is a diagram showing the use of the cardboard box lid-opening holder 1 of this invention. The cardboard box lid-opening holder 1 can be attached to the cardboard box B by fitting the corners of the cardboard box lid-opening holder 1 to the corners of the cardboard box B, which has its top lid folded outward and aligned with the side panel, and fitting it in from above.

[0022] When the cardboard box lid-opening holder 1 is attached to the cardboard box B, the thin ridges 5, 5 formed facing the outer wall inner surface 21 and the inner wall inner surface 31 bite into the top lid piece and side panel of the overlapping cardboard box B, thereby holding them together, and the thin ridges 5, 5 function as anti-slip. Furthermore, because the thin ridges 5, 5 are formed as ridges extending vertically, they also function as vertical ribs that reinforce the outer wall 2 and inner wall 3 of the cardboard box lid-opening holder 1. This function of the thin ridges 5, 5 makes it possible to prevent the attached position of the cardboard box lid-opening holder 1 from gradually shifting due to the restoring force of the top lid piece.

[0023] Furthermore, since the thin protrusions 5, 5 are formed at a predetermined interval from the lower edges of the outer wall inner surface 21 and the inner wall inner surface 31, when the corners of the cardboard box lid opening holder 1 are aligned with the corners of the cardboard box B with the upper lid piece folded outward and aligned with the side panel and fitted from above, the thin protrusions 5, 5 do not get in the way and the fitting can be done smoothly.

[0024] Furthermore, the upper and lower edges of the thin ridges 5, 5 are formed so as to be smoothly and continuously connected to the outer wall inner surface 21 and the inner wall inner surface 31, respectively, so that there is no risk of the cardboard box lid opening holder 1 getting caught on the upper and lower edges of the thin ridges 5, 5 when attaching or detaching it to or from the corner of the cardboard box B in a state where the upper lid piece is folded outward and aligned with the side panel.

[0025] In this embodiment, the thin protrusions 5, 5 are formed facing each other on the outer wall inner surface 21 and the inner wall inner surface 31, but they may be provided in positions that are shifted so that they do not face each other, or they may be provided on only one of the outer wall inner surface 21 and the inner wall inner surface 31. Also, in this embodiment, one pair of thin protrusions 5 is formed in each of two regions bounded by a corner that is approximately L-shaped in plan view, but two or more pairs may be formed. [Industrial Applicability]

[0026] This invention relates to a cardboard box lid opening holder that folds the top lid piece of a cardboard box outward and clamps it together with the side panel at the corner of the cardboard box to keep the lid open, and has industrial applicability. [Explanation of symbols]

[0027] 1 Lid holder for cardboard boxes 2 Outer wall 21 Inner surface of outer wall 3. Inner wall 31 Inner wall inner surface 4 Ceiling wall 5 Thin-walled convex strips

Claims

1. A cardboard box lid opening holder that holds the lid open by folding the top lid piece of the cardboard box outward and clamping it together with the side panel at the corner of the cardboard box, The storage unit includes a pair of side walls that are erected facing each other in a generally L-shape in plan view, and a top wall that connects upper edges of the pair of side walls, a thin protrusion extending in a vertical direction is formed on an inner surface of at least one of the pair of side walls; The upper and lower edges of the thin-walled ridges are connected to the inner surface so as to be smoothly continuous. Lid holder for cardboard boxes.

2. The thin protrusions are formed on the inner surfaces of the pair of side walls, facing each other. The cardboard box lid opening holder according to claim 1.

3. The thin-walled protrusion is formed at a predetermined interval from the lower edge of the inner surface of the side wall. The cardboard box lid opening holder according to claim 1 or 2.

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