JPH04201875A - packing case - Google Patents

Abstract

PURPOSE:To prevent dislocation of a cushioning material by utilizing flaps at the bottom or the top in such a manner as to form at each of the four corners of the bottom a mortise as a means of holding one tenon projecting from the bottom of a cushioning material in order not to allow the cushioning material to be vertically dislocated and as a means of holding another tenon in order not to allow the cushioning material to be horizontally dislocated. CONSTITUTION:At the bottom of a case 11, an inner-side flap 11a in which a mortise 25 is opened is laid upon an outer-side flap 11b in which a mortise 26 is opened; the mortise 25 is formed to a larger breadth at a part 25a and to a smaller breadth at the remaining part 25b and the mortise 26 corresponds in position to the mortise 25. A cushioning material 12 is formed as a corner pad composed of a base part 12e and a rising part 12f and having a tenon 28 and a cylindrical tenon 30 both projecting from the underside. The tenon 28 is composed integrally of a projection part 28a and a projection part 28b which fit respectively into the mortises 26, 25. The cylindrical tenon 30 fits into a mortise 11e: after fitting the projection part 28a into the back of the mortise 26, sliding of the cushioning material 12 toward the corner of the case simultaneously puts the cylindrical tenon 30 into the mortise 11e.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a packaging case composed of a box such as a cardboard box and a cushioning material such as styrofoam.

[Prior Art] Conventional prior art of this type of packaging case includes, for example, a packaging device disclosed in Japanese Utility Model Application Publication No. 110274/1980, a packaging device disclosed in Japanese Utility Model Application Publication No. 185268/1987, etc. There is. These packaging cases have a cushioning material arranged inside opposing both side walls of the box, and the cushioning material is shaped to extend from corner to corner inside the box.

However, if the cushioning material is shaped to extend between the corners on the inside of the box, the cushioning material will be larger than necessary, resulting in high costs, and there is also the disadvantage that it is difficult to arrange the cushioning material inside the box.

As a prior art technique for solving such drawbacks, there is a packaging device disclosed in, for example, Japanese Utility Model Application Publication No. 105623/1983. This device uses so-called corner pad-shaped cushioning material that is installed independently at each corner of the box.

10 and 11 are diagrams showing the configuration of the above-mentioned prior art. In each figure, (1) is a box such as a cardboard box, (2)
) indicates a corner pad-like cushioning material, (3) indicates an item to be packed, and the bottom surface of the cushioning material (2) has a protrusion (2a
) is formed, and the bottom of the box (1) is provided with a through hole (1b) in which the protrusion (2a) engages, and each cushion material (2) is arranged at the corner of the bottom of the box (1). Then, the cushioning material (2) is fixed to the bottom of the box (1) by engaging the projections (2a) with the through holes (1b), and after positioning, place the item to be packed on the cushioning material (2). (3) will be installed.

Then, the cushioning material (2) is also arranged on the upper side of the object to be packed (3), the flap (1a) is closed, and the packing is completed.

[Problems to be Solved by the Invention] Since the conventional packaging case as described above is configured as described above, the cushioning material (2) is not fixed in the vertical direction, and the bottom surface of the box (1) Even if the cushioning material (2) is placed at the corner of the box, if the box (1) shakes during the packing process, the position of the cushioning material (2) will shift, and as shown in Figure 11, each cushioning material ( 2) is smaller than the width dimension A of the item to be packed (3),
) can no longer be stored in box (1), and the cushion material (
2) had to be rearranged.

The present invention was made to solve this problem, and an object of the present invention is to provide a packaging case that uses corner pad-like cushioning material but does not cause displacement of the cushioning material.

[Means for Solving the Problems] The packaging case according to the present invention has at least two or more flaps formed at each of the four corners of the bottom of the packaging box using an upper flap and a lower flap that form the bottom surface of the packaging box. In addition to providing an engagement hole, two or more protrusions are formed on the bottom surface of the cushioning material, and the engagement between one protrusion and the engagement hole restricts the vertical movement of the cushioning material, and the other one The horizontal movement of the cushion material is restricted by engagement between the three or more protrusions and the engagement hole.

[Function] In the packing case of the present invention, the vertical movement of the cushioning material can also be restricted, so it is possible to prevent the cushioning material from shifting while using the cushioning material in the form of a corner pad.

[Example] An example of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged perspective view of a part of the packaging case according to an embodiment of the present invention, and FIGS. 2 and 3 are for explaining the operation of fixing the cushioning material to the bottom of the packaging box in this embodiment. Figure 4 is a vertical sectional view of the packaging case according to this embodiment, Figure 5 is a cross sectional view showing the packaging case according to this embodiment with the cushioning material removed, and Figure 6 is a vertical sectional view of the packaging case according to this embodiment. Fig. 5 is a sectional view showing the bottom surface of the packaging case taken along the line FIG. 9 is a sectional view showing the cushion material shown in FIG. 8 taken along line WW.

As shown in Figure 4, at the bottom corner of the box (11),
Cushioning materials (12) in the form of corner pads made of styrofoam or the like are arranged, and the objects to be packed (3) are placed on these cushioning materials (12).

Further, a cushioning material (22) is placed above the object to be packed (3), and in this state, the flap (lla) is closed to complete the packing.

In addition, as shown in Figures 1, 5, and 6, a box (11
) has an inner flap (lla) and an outer flap (
llb) are overlapped, and engagement holes (25) and (26) are formed in the overlapped portions, respectively.

The engagement hole (25) consists of a wide part (25a) and a narrow part (25b), and its opening has a convex shape. Further, a circular engagement hole (lie) is formed in the inner flap (lla) at a position a predetermined distance apart from this engagement hole (25).
is positioned on an extension of the center line of the engagement hole (25).

An engagement hole (26) is formed in the outer flap (llb) at a position corresponding to the engagement hole (25), and this engagement hole (26)
has the same width as the wide portion (25a) of the engagement hole (25).

As shown in FIGS. 7 to 9, the cushioning material (12) has a square flat base (12e) and a base (12e).
) and a raised part (12f) integrally formed, and has a so-called corner pad shape, and a protruding part (28) is formed on the lower surface thereof. Furthermore, this protrusion (28
), the wide first convex part (28a) and the narrow second convex part (28b) are integrated, and each engages with the engagement hole (25).
), (26).

Further, an engagement hole (11) is provided on the lower surface of the cushion material (12).
A cylindrical protrusion (30) is formed at a position that engages with e).

Note that the protrusion (28) may extend from within the hole (12c) formed on the lower surface of the cushioning material (12), as shown in FIG. ), but the protrusion (28) may be formed directly on the lower surface of the tension member (12) without providing the hole (12c).

Next, the cushioning material (12) is installed on the bottom of the box (11).

The fixing operation will be explained. As shown in Fig. 2, insert the protrusion (28) into the engagement hole (25), place the cushioning material (1-2) on the bottom of the box (11), and press the cushioning material (12) to make the first The convex portion (28a) is engaged with the rear portion of the engagement hole (26). Then, in this state, slide the cushioning material (12) to the corner of the box (1), completely fit the first protrusion (28a) into the engagement hole (26), and at the same time engage the protrusion (30). Fit it into the hole (lie).

By fixing the cushioning material (12) to the bottom of the box (1) in this way, the upper surface of the first convex portion (28a) comes into contact with the lower surface of the inner flap (lla), and the cushioning material (12) Prevents movement in the vertical direction.

Further, the periphery of the protrusion (30) contacts the inner circumferential surface of the engagement hole (lie), restricts horizontal movement of the cushion material (12), and prevents sliding of the first protrusion (28a). The cushioning material (12) is firmly fixed at the installation position, and even if the box (11) shakes during packing work, it will not shift from the installation position.

[Effects of the Invention] As explained above, the present invention has a simple structure and can restrict the vertical movement of the cushioning material, so it is possible to provide a packing case that allows easy packing work while using the cushioning material in the form of corner pads. There is an effect that can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged perspective view of a packaging case according to an embodiment of the present invention, Figs. 2 and 3 are diagrams for explaining the operation of fixing the cushion to the box, and Fig. 4 is this embodiment. FIG. 5 is a cross-sectional view showing the packing case according to this embodiment with the cushioning material removed, and FIG. 6 shows the bottom surface of the packing case shown in FIG. 5. FIG. 7 is a side view showing the structure of the cushioning material according to this embodiment; FIG.
The figure is a plan view, FIG. 9 is a sectional view showing the cushioning material shown in FIG. 8 taken along line W-W, FIG.
FIG. 1 is a diagram showing the configuration of a conventional packaging case. In the figure, (11) is a box, (12) is a cushion, (
11e), (25), (26> are engagement holes, (28
>, (30) indicates a protrusion. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A packaging case in which independent cushioning materials are arranged at each of the four corners of the bottom of the packaging box, and items to be packed are fixed in the packaging box with these cushioning materials, means for providing at least two or more engagement holes in each of the four corners of the packaging box by using an upper flap and a lower flap that form the bottom surface of the packaging box located at the four corners; One of the upper flaps is used to form a convex opening, and the lower flap is used to form a hole inside that is wider than the convex opening, and an engagement hole with a double structure in the vertical direction is formed. means for forming two or more protrusions on the bottom surface of each of the independent cushioning materials to engage with the two or more engagement holes; one of the protrusions has a vertically convex shape; means for regulating vertical movement of the cushioning material using the double structure by inserting the protrusion into the convex opening and sliding it horizontally to engage; A packaging case comprising: means for regulating horizontal movement of the cushioning material by engaging another one of the engagement holes with another one of the protrusions.