JPH0958686A - Corner cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit a corner cap to a corner of a corrugated fiberboard box with one-touch control for reinforcement by using a plastic molded piece which is flat viewed in a plan with overhang regions which can be folded and engaged provided at both wings of a center region forming a multi-stage hinge structure. SOLUTION: A corner cap comprises a thin plastic molded piece which is flat viewed in a developed state. A left wing region 2L having an engaging member 4a and a left overhang region 3L having an engaging member 4b on its upper side is connected to a left side of a center region 1 of a multi-stage hinge structure with a plurality of grooves (g) formed in a longitudinal direction, while a right wing region and a right overhang region similarly having the engaging members 4a, 4b are respectively connected to a right side via grooves (g') so that they can be folded and engaged. When a corner cap is to be used, the left and right overhang regions 3L, 3R are folded along the grooves (g') while the center region 1 is curved at the grooves 9, and after the corner caps are put over four corners of a corrugated fiberboard box, the engaging members 4a, 4b are used for engaging them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when assembled from paper or plastic corrugated cardboard into a box, fits into the corners to reinforce the corners of the box and to facilitate stacking of the boxes. It's about corner caps. The invention also relates to a cardboard box fitted with the corner cap.

[0002]

2. Description of the Related Art When assembling boxes from corrugated cardboard, when the boxes are stacked, the corners of the boxes are weak, and the upper box cannot be placed accurately on the lower box, causing a load collapse. is there.

Therefore, it has been proposed or proposed to fit a cap-shaped reinforcing member in the corner of the box and a frame-shaped reinforcing member in the upper side of the box to reinforce the upper side. There is. A rectangular frame-shaped reinforcing member that simultaneously reinforces the corners and the upper side of the box is also known.

For example, Japanese Unexamined Patent Publication No. 5-294343 discloses an assembling type container using a member inserted into the upper side of the main body and a corner member inserted into a corner of the main body.

Japanese Utility Model Publication No. 62-21551 (Japanese Utility Model Publication No. 5)
7-186326) discloses a rectangular frame-shaped reinforcing member that simultaneously reinforces a corner and an upper side of a box.

Japanese Utility Model Publication No. 62-21549 (Japanese Utility Model Publication No. 5)
6-131325) and Jitsuko Sho 62-2155.
No. 0 (Japanese Utility Model Laid-Open No. 57-1123) discloses that the angle of corners at the time of assembly is completely maintained by the action of braces, and the braces are removed to bend each corner member inward or outward. The frame of the returnable box is shown.

Japanese Unexamined Patent Publication No. 2-266953 discloses a cardboard box made of paper corrugated card having a mouth frame for protecting the cut end at the upper end of the side wall and a corner holder for holding the mouth frame at each corner. ing.

[0008]

However, most of the conventionally used or proposed corner caps have little consideration for the foldability of the corrugated cardboard box, and those designed to be foldable are three-dimensional. There is a problem that the corner cap itself is bulky. in addition,
Since only emphasis is placed on reinforcement, there is room for improvement in terms of ease of mounting on the box and cost.

Under such a background, the present invention is not flat because it is a flat thin plate in a normal state, and it can be formed into a three-dimensional shape by one-touch and set in a corner of a cardboard box. The set can reinforce the corners of the cardboard boxes and facilitate the stacking of the boxes.Furthermore, the boxes can be folded with the corner caps attached, so they can be collected and reused. The purpose is to provide a corner cap that does not interfere.

[0010]

The corner cap of the present invention is a thin plate-shaped plastic molded piece which is flat in a developed view and is used by being fitted in the corner of the opening of a corrugated box (B). The central region (1), the left wing region (2L) connected to the left side of the central region (1) and the right wing region (2R) connected to the right side of the central region (1), and the left wing region
It consists of a left overhang area (3L) connected to the upper side of (2L) and a right overhang area (3R) connected to the upper side of the right wing area (2R), and the height of the central area (1) is , The left wing region (2L) and the right wing region (2R) are projected to be higher than the height of the right wing region (2R), and the central region (1) has a plurality of vertical grooves.
(g) is formed as a multi-stage hinge structure, the left overhanging region (3L) is formed so as to be foldable with respect to the left wing region (2L), and is formed in both regions that are the inner surface side at the time of folding. Are provided with engaging members (4a), (4b) that engage with each other, and similarly, the right overhang region (3R) is formed to be foldable with respect to the right wing region (2R), An engaging member that engages with each other in both areas that are the inner surface side when folded
It is characterized in that (4a) and (4b) are provided.

Hereinafter, the present invention will be described in detail.

The corner cap of the present invention is for use by being fitted into the corner of the opening of the corrugated box (B). As corrugated cardboard, in addition to paper corrugated cardboard, paper corrugated cardboard coated with resin film, plastic corrugated cardboard that uses plastics material instead of paper material (the cross-sectional shape has a corrugated core shape, a ladder shape, etc. Can also be used.

The corner cap of the present invention is formed of a thin plate-shaped plastic molded piece which is flat in a developed view. As a plastics material for molding, polypropylene is particularly desirable because it has excellent folding resistance of the thin film portion, good water resistance, is easy to mold, and is advantageous in terms of cost, but other materials can also be used. it can.

The corner cap of the present invention has a central region.
(1), left wing region (2L), right wing region (2R), left bulge region (3L) and right bulge region (3R). The arrangement relationship of these areas will be described in detail later, but the image in the developed view is as shown in Table 1 below. □ is each area, and △ is the overhang part of the central area (1).

[0015]

[Table 1] □ △ □ □ □ □ □

The left wing region (2L) is connected to the left side of the central region (1), and the right wing region (2R) is connected to the right side of the central region (1). The height of the central area (1) is projected upward so as to be higher than the height of the left wing area (2L) and the right wing area (2R).

The left overhang region (3L) is connected to the upper side of the left wing region (2L), and the right overhang region (3R) is connected to the upper side of the right wing region (2R). These connecting parts are the left and right overhang areas (3L),
(3R) cardboard box to facilitate folding
It has a hinge structure made up of two grooves (g '), (g') that are installed at intervals equal to or slightly wider than the thickness near the corner of the opening in (B). desirable. Each groove
(g ') is usually V-shaped, U-shaped, or a shape close to them in a sectional view.

The central region (1) has a multistage hinge structure in which a plurality of grooves (g) are formed in the vertical direction. Each groove (g)
Has a V-shape, a U-shape, or a shape close to those in a cross-sectional view. The number of grooves (g) is often about 4 to 12, but may be smaller or larger.

When the bottom area of the corrugated board box (B) is large, when one operator manually stacks the boxes, the upper box (B ) It is desirable to be able to fit the bottom easily. Therefore, in such a case, it is desirable to adopt at least one of the first device and the second device described below. With such a device,
When the cardboard boxes (B) are stacked, the upper box is smoothly guided, and the bottom of the upper box creates a central area.
(1) The trouble that the upper side of the (1) is crushed does not occur.

A first measure is to form the left and right shoulders of the upward projecting portion of the central area (1) in a slope (S) having a straight or tapered shape, a curved or rounded shape, a polygonal line shape, or the like. . The second idea is that the areas (R) near the left and right shoulders of the upper overhang of the central area (1) project slightly outward when set in the corrugated cardboard box (B). It is to have a twist structure.

Furthermore, in the above-mentioned left overhanging region (3L) and left wing region (2L), engagement is made between the left overhanging region (3L) and the inner surface of the left overhanging region (3L) when folded. Material (4a), (4b)
Is provided. Similarly, in the right bulge region (3R) and the right wing region (2R), the surface that is the inner surface side of the right bulge region (3R) at the time of folding, the engaging member that engages both regions ( Provide 4a) and (4b).

As the engaging members (4a), (4b), those having detachable male and female hooks are preferably used so that different kinds of materials can be separated and discarded at the final disposal stage. At this time, the male and female hooks can be correctly attached to the vertical and horizontal positions of the corner caps as shown in FIG. 1 described later, and can be made of a cardboard box (B).
In order to minimize the decrease in strength caused by making holes in the hole, it is desirable to use a two-position hook. The length of the hook is set in consideration of the presence of the opening of the box (B) between the hooks. However, if it can be permanently fixed, a welding type hook may be used.
The engaging members (4a) and (4b) are not limited to these hooks, and various types of engaging members that can be engaged are used.

When the corner cap of the present invention is used, two grooves are formed so that the left overhang region (3L) and the right overhang region (3R) are directed toward the left wing region (2L) and the right wing region (2R), respectively. While folding back at (g '), (g') and curving the central area (1) at the groove (g), cover each of the four corners of the corrugated box (B), Left overhang area (3
L) and the left wing region (2L), and the right overhang region (3R) and the right wing region (2R) need only be engaged with the corresponding engaging members (4a), (4b).

In this case, as shown in FIG. 5, which will be described later, the above-mentioned engaging member is provided near the corner of the cardboard box (B) in advance.
A through hole (h) for engaging (4a) and (4b) is provided. The through hole (h) is preferably a horizontally long hole in order to facilitate the engagement of the engaging members (4a) and (4b). As an example, when the engaging members (4a), (4b) are male and female hooks,
Assuming that the female hook has a diameter of d, the through hole (h) is an elliptical hole having a vertical width of approximately d and a horizontal width of approximately 2d. By doing so, it is possible to absorb the difference in outer circumference when the box (B) is folded.

[0025]

If the corner cap of the present invention is used, it can be formed into a three-dimensional shape by one-touch and can be set by being fitted into the corner. The set minimizes the strength of the cardboard box (B) and reduces the strength of the box (B).
The corners of the box (B) can be reinforced, and the boxes (B) can be easily stacked even when the bottom dimension of the box (B) is large. In addition, the box (B) with the corner cap attached can be folded as it is, so the box
It does not hinder the collection and reuse of (B). Further, since the corner cap of the present invention can be molded by a single mold by injection molding, the cost can be suppressed. Further, even in the case of final disposal, by removing the corner cap, it is possible to separate or dispose of either one.

[0026]

EXAMPLES The present invention will be further described with reference to examples.

FIG. 1 is a front view of a corner cap of the present invention in a developed state, FIG. 2 is a bottom view of the developed state, and FIG. 3 is a right side view of the developed state. FIG. 4 is a partial perspective view of a box equipped with a corner cap. Figure 5 shows a cardboard box
FIG. 7 is an enlarged view of a portion where a through hole (h) is formed in (B). FIG. 6 is a perspective view of a box equipped with a corner cap. FIG. 7 is a perspective view of a stack of the boxes of FIG.

The corner caps shown in FIGS. 1 to 3 were manufactured by injection molding polypropylene. The dimensions are listed in Figures 1-3.

This corner cap has a central area (1),
The left wing region (2L), the right wing region (2R), the left bulge region (3L) and the right bulge region (3R) are configured.

The left wing region (2L) is connected to the left side of the central region (1), and the right wing region (2R) is connected to the right side of the central region (1). The left overhang area (3L) is connected to the upper side of the left wing area (2L), and the right overhang area (3R) is connected to the upper side of the right wing area (2R). The height of the central region (1) is set to be higher than the height of the left wing region (2L) and the right wing region (2R).

The left wing region (2L) -left bulge region (3L) and the right wing region (2R) -right bulge region (3R) are continuously connected to each other at the connecting portions, which are two V-shaped grooves in cross section. (g ') and (g') are added to the thickness of corrugated board (for example 6.5mm) with an interval (for example 7mm) allowing for a margin of about 0.5mm. It has a structure.

On the inner surface side of the central region of the above-mentioned central region (1), six V-shaped grooves (g) are formed in the longitudinal direction in a sectional view, and this central region has a multistage hinge structure. It is designed to be. Further, the left and right regions opposite to the surface having the multistage hinge structure are formed in a vertical cross-shape in consideration of strength and aesthetics.

The left and right shoulders of the upper protruding portion of the central area (1) are formed in a linear slope (S). The area (R) near the slope (S) has a slightly twisted structure so that it slightly projects outward when set in the corrugated box (B).

In order to fold the left overhanging region (3L) and the right overhanging region (3R) into engagement with the left wing region (2L) and the right wing region (2R) respectively, the surface on the inner surface side of each is described below. The engaging members (4a), (4b) are provided so as to correspond to each other. In order to reinforce the part where the engaging members (4a) and (4b) are provided, in the area opposite to the surface where the engaging members (4a) and (4b) are provided, the diagonal direction A strip-shaped thick part (t) is formed facing toward.

-Left wing region (2L), right wing region (2R): Dual-type engaging member (4a) consisting of a female hook having a diameter of 8 mm-Left bulge region (3L), right bulge region (3R) : Dual-type engagement member (4b) consisting of male hook

The corner cap having the above structure is used by fitting it into four corners of a corrugated box (B) as shown in FIG. 4 or 6, and the boxes (B) are stacked as shown in FIG. You can In order to engage the engaging members (4a), (4b) consisting of male and female hooks, the corresponding through-holes (h) (the vertical width is shown in FIG. 8
oval hole with a width of 16 mm and a width of 16 mm) is formed.

[0037]

As described in the section of the operation, if the corner cap of the present invention is used, it can be formed into a three-dimensional shape by one-touch and can be set by being fitted into the corner. The set minimizes the decrease in strength of the corrugated board box (B) and reinforces the corners of the box (B), and even when the bottom dimension of the box (B) is large, the box (B) ) Can be easily stacked. In addition, since the box (B) with the corner cap attached can be folded as it is, it does not hinder the recovery and reuse of the box (B). Further, since the corner cap of the present invention can be molded by a single mold by injection molding, the cost can be suppressed. Further, even in the case of final disposal, by removing the corner cap, it is possible to separate or dispose of either one.

[Brief description of drawings]

FIG. 1 is a front view of a developed state of a corner cap of the present invention.

FIG. 2 is a bottom view of the corner cap of FIG. 1 in a developed state.

FIG. 3 is a right side view of the corner cap of FIG. 1 in a developed state.

FIG. 4 is a partial perspective view of a box equipped with a corner cap.

FIG. 5 is an enlarged view of a portion where a through hole (h) is formed in a cardboard box (B).

FIG. 6 is a perspective view of a box equipped with a corner cap.

FIG. 7 is a perspective view of a stack of the boxes of FIG.

[Explanation of symbols]

(1) ... central area, (S) ... slope, (R) ... areas near the left and right shoulders of the overhang, (2L) ... left wing area, (2R) ... right wing area, (3L) ... left overhang Area, (3R) ... Right overhang area, (4a), (4b)
... Engagement member, (g), (g ') ... Groove, (t) ... Thick part, (B) ...
Cardboard box, (h) ... through hole

Claims (5)

[Claims] 1. A flat plate-shaped plastic molded piece that is flat in a developed view and is used by being fitted in a corner of an opening of a corrugated cardboard box (B), the central region (1) and its center. The left wing area (2L) connected to the left side of the area (1), the right wing area (2R) connected to the right side of the central area (1), and the left overhang connected to the upper side of the left wing area (2L). The right wing region (2L), the right wing region ( 2R), and the central region (1) has a multistage hinge structure in which a plurality of grooves (g) are formed in the longitudinal direction, and the left protrusion The region (3L) is formed so as to be foldable with respect to the left wing region (2L), and engaging members (4a) that engage with each other on both inner side regions at the time of folding. , (4b) are provided, and similarly, the right overhang region (3R) is formed so as to be foldable with respect to the right wing region (2R), and is formed in both regions on the inner surface side at the time of folding. Are engaging members (4
A corner cap characterized by having a) and (4b). 2. The corner cap according to claim 1, wherein the engaging members (4a), (4b) are detachable male and female hooks. 3. The corner cap according to claim 2, wherein the male and female hooks are two-position hooks. 4. The left and right shoulders of the upper extension of the central area (1) are formed on slopes (S), or the areas (R) near the left and right shoulders of the upper extension of the central area (1). 3. The corner cap according to claim 1, wherein) has a twist structure that slightly protrudes outward when being set in the cardboard box (B). 5. A corrugated board box (B) is provided between the left wing region (2L) -left bulge region (3L) and the right wing region (2R) -right bulge region (3R). ) Grooves installed at a distance equal to or slightly wider than the thickness near the corner of the opening
The corner cap according to claim 1, which has a hinge structure made of (g ') and (g').