JPH11170412A - Part fitting structure for plastic corrugated fiberboard and box with lid made of plastic corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a part fitting structure for a plastic corrugated fiberboard by loading a fitting of thermoplastic resin which is integrally combined with a part such as a grip part into the hollow part of the plasic corrugated fiberboard and thermally welding the fitting member with the plastic corrugated fiberboard. SOLUTION: A fitting member 14 of thermoplastic resin which is integrally combined with a part 13A such as a fitting part, is loaded into one of continuously connected hollow parts 4b partitioned with center cores between two liners 4a of synthetic resin of a plastic corrugated fiberboard 4. Further, the fitting member 14 and the plastic corrugated fiberboard 4 are thermally welded together. Under this part fitting structure, it is possible to fit various kinds of the part 13A onto the plastic corrugated fiberboard 4 through the fitting member 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for attaching a part such as a handle part to a plastic cardboard, and a plastic cardboard lid provided with a locking part for fixing a lid with such a mounting structure. Related to a box having

[0002]

2. Description of the Related Art Conventionally, in order to attach a part such as a handle part made of a synthetic resin to a plastic cardboard, a method of fixing with a metal stud or a needle is generally used.

[0003]

However, the method of driving a metal card stud or a needle into a plastic cardboard to stop a part has a problem in that the workability is poor, and extra labor and cost are required.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above, and is directed to a plastic corrugated cardboard having a large number of hollow portions separated by a core between two synthetic resin liners. A mounting member made of a thermoplastic resin, which is integrated with a part such as a grip part, in the hollow portion, and the mounting member and the plastic cardboard are heat-welded to provide a component mounting structure for a plastic cardboard. I do.
According to this component mounting structure, various components can be mounted on the plastic cardboard via the mounting member.

According to a second aspect of the present invention, a bent groove is formed in one liner and a mounting member of the plastic corrugated cardboard and bent, and the cut ends of the bent grooves are welded and closed. You can also. When the cut ends of the bent grooves are heat-sealed and closed as described above, the plastic cardboard liner and the mounting member are melted and hardened to become integral with each other, and the mounting member is bent integrally with the plastic cardboard. The attachment member does not come off the plastic cardboard due to the synergistic action of refraction. Therefore, the component is firmly attached to the plastic cardboard via the attachment member.

Further, as described in claim 3,
A combination of a box body having a side plate erected on a bottom plate and a plastic cardboard lid for covering the upper surface of the box body, wherein the box body has a locking portion and is engaged with the locking portion. The present invention provides a box in which a locking part for fixing a lid is attached to a lid with the above-described mounting structure. In this box, the locking part of the lid is engaged with the locking part of the box body so as to prevent the lid from opening, but the locking part is attached to the plastic cardboard lid. Because it is attached with a structure,
It has sufficient strength without using metal studs or needles.

[0007]

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with respect to a box. 1 is a perspective view of a box, FIG. 2 is a cross-sectional view of the box showing a main part, FIG. 3 is an exploded perspective view of a lid and a locking part,
4 (a) to 4 (c) are cross-sectional views illustrating a method of mounting the mounting parts, and FIG. 5 is a cross-sectional view illustrating another embodiment of the locking portion of the box body.

As shown in FIG. 1, the box 1 comprises a rectangular box body 2 and a lid 3 for opening and closing the upper surface of the box body 2. The box main body 2 is a foldable structure using plastic cardboard 4 and has side plates 6a to 6d constituting peripheral walls on four sides of a square bottom plate 5, and the two side plates 6a and 6c facing each other are centered on the upper edges thereof. And the two side plates 6b and 6d are connected to the center folding curve 7
And folding the folding screen around the center, such side plates 6a ~
6d can be folded into a flat state.

As is well known, the plastic cardboard 4 has a large number of cores between two liners 4a made of a synthetic resin (eg, polypropylene, polyethylene, etc.) having a thickness of about 0.4 mm, for example. This is a form in which partitioned hollow portions 4b are continuously provided, and the entire thickness is about 5 mm. Each hinge portion of the side plates 6a to 6d (the upper edge of the fold curve 7 and the side plates 6a and 6c) is cut with a cut line except for one liner 4a of the plastic cardboard 4, and the remaining one liner 4a Is bent.

The upper edges of the side plates 6a to 6d are fitted with molding members 8a to 8d made of synthetic resin. Side plate 6a,
The molding members 8a, 8c provided on the upper edge of 6c have a known structure having a downward U-shaped cross section, and the side plates 6a, 6c are fitted in grooves that open downward. As shown in FIG. 2, the molding member 8b provided on the upper edge of the side plate 6b has a U-shaped cross-section and an eave-shaped locking portion 9 protrudes from the lower edge on the outside. The side plate 6b fits in a groove that opens downward. Furthermore, the molding member 8d provided on the upper edge of the side plate 6d has a structure in which, as shown in FIG. 2, a sub-groove 11 that opens in the opposite direction (upward) beside the main groove 10 for the side plate. The side plate 6 d is fitted in the main groove 10.

The molding members 8a to 8d are connected squarely by four corner members 12, 12,... Each corner member 12 is an integrally molded product of a synthetic resin,
L-shaped horizontal plate 12a and two pieces of clamp plates 12b, 12b vertically downwardly protruding from both side edges of the horizontal plate 12a.
And an enclosing frame 1 projecting upward from an outer edge of the horizontal plate 12a.
2c. The two pieces of clamp plates 12b, 12b
It has an interval and a height extending over the molding members 8a to 8d.

On the other hand, the lid 3 is made of the same plastic corrugated cardboard 4 as the box main body 2, and is connected to a lid main plate 3a for closing the upper surface of the box main body 2 via a hinge 3b at the rear edge of the lid main plate 3a. A fixing piece 3c is provided, and a lid stopper piece 3d, which will be described later, provided on the front side edge of the lid main plate 3a. The fixing piece 3c is fitted into the sub-groove 11 of the molding member 8d so that it can be opened and closed on the box body 2. Get on. The hinge portion 3b between the lid main plate 3a and the fixing piece 3c is connected to the liner 4a of the plastic cardboard 4.
The bent groove is cut into a V-shape except one.

As described above, the lid 3 is provided with the lid stopper piece 3d bent downward at an angle of 90 degrees at the front edge of the lid main plate 3a. This lid stopper piece 3d is provided with a hook-shaped locking part 13A attached to the tip thereof.
3A engages with the locking portion 9 of the molding member 8b as shown in FIG. 2 and locks the lid 3 strongly. Therefore, even if the airbag is used for a transportation method such as putting an airbag together with glass or ceramic articles in the box body 2 and inflating the airbag to prevent the articles from moving or being damaged, the internal pressure of the airbag may be reduced. The lid 3 does not open. The engagement / release of the engagement part 9 with the engagement part 13A is possible by elastically deforming the lid stopper piece 3d.

Next, a method of attaching the locking part 13A will be described. First, as shown in FIG. 3, a rod-shaped mounting member 14 made of a thermoplastic resin (for example, polypropylene, polyethylene, or the like) is provided on the locking component 13A at an appropriate interval at the rear edge of the main body. Each of the mounting members 14 is thick enough to enter the hollow portion 4b of the plastic cardboard 4 and is longer than the length of the lid stopper piece 3d. On the other hand, the lid 3 is in a flat state before bending the lid stopper 3d.

Next, as shown in FIG. 4A, all the mounting members 14 of the locking parts 13A are loaded (inserted) into the hollow portion 4b of the plastic cardboard 4. And 25
FIG. 4B shows a V-shaped blade 15 heated to about 0 ° C. to 300 ° C.
As described above, a bent groove 16 having a depth that does not reach the lower one liner 4a by being pressed against the fold curve (see the imaginary line L in FIG. 3) of the plastic cardboard 4 is formed. Since the mounting member 14 passes below the fold curve L, a bent groove 16 is formed in the mounting member 14 by the V-shaped blade 15. Since the cut end of the bent groove 16 is in a molten state due to the heat of the V-shaped blade 15, the bent groove 16 is closed as shown in FIG. When the temperature decreases in this state, the cuts of the plastic cardboard 4 and the cuts of the mounting member 14 and the plastic cardboard 4 and the mounting member 14 are integrally joined. As a result, the lid stopper piece 3d is 9
It is bent at 0 degree and the locking part 13A is attached to the lid 3.

In the first embodiment, the box body 2
The locking portion 9 may use the lower edge of the molding member 8b as shown in FIG. 5, or may form a through hole in the side plate 6b and hook the locking component 13A there.

[0017]

Second Embodiment FIG. 6 is a sectional view showing a second embodiment. The component of the second embodiment is a handle component 13B attached to the upper side of the box body 2. In the handle part 13B, the mounting member 14 is integrally protruded from the main body. Then, the V-shaped blade 15 described in the first embodiment is changed to a W-shaped blade (not shown), a W-shaped bent groove 16 is formed in the plastic cardboard 4 and the mounting member 14, and two plastic cardboards 4 are stacked. Fold so that it becomes. In FIG. 6, the point P may be reinforced by, for example, ultrasonic welding.

[0018]

Third Embodiment FIG. 7 is a sectional view showing a third embodiment. The component of the third embodiment is a molding component 13C attached to the bottom plate 5 side of the box main body 2 of the first embodiment, and the mounting member 14 projects integrally from the main body of the molding component 13C. Then, similarly to the first embodiment, a V-shaped bent groove 16 is formed in the plastic cardboard 4 and the mounting member 14 using the V-shaped blade 15, and the end of the bottom plate 5 is bent at 90 degrees.

Although the present invention has been described with reference to the first to third embodiments, the present invention is not limited to the above embodiments. For example, in the first to third embodiments, the bent groove 16 is provided in the plastic cardboard 4 and the mounting member 14 and heat welding is performed at the bent portion. However, as shown by a broken line in FIG. The ultrasonic welding machine 17 may be pressure-bonded to the outer side of the device, and the two liners 4a, 4a and the mounting member 14 may be thermally welded by ultrasonic waves. Although the first to third embodiments have described the box 1 using the plastic cardboard 4, the component mounting structure of the present invention is applicable to all products using the plastic cardboard 4. In addition, the plastic cardboard 4 may be manufactured by a known laminating method in addition to the one manufactured by the integral extrusion molding method shown in the figure.

As shown in FIG. 8, a mounting member 14 is protruded from the adapter part 13D to be mounted on the plastic cardboard 4, and the molding member 8e is inserted through the adapter part 13D.
You may make it attach.

[0021]

As described above, the component mounting structure of the present invention
Various components can be attached to the plastic cardboard via the attachment members. In particular, when all the metal studs and needles are changed to the mounting structure of the present invention, it becomes possible to make the plastic cardboard products 100% synthetic resin. By doing so, when the used plastic corrugated product is recycled (for example, crushed and turned into oil), it has a high cost advantage. Incidentally, when recycling plastic cardboard products using metal studs or needles, it is necessary to remove them in advance, and the removal process is a factor that increases the recycling cost.

Further, as in claim 2, the cuts of the bent grooves are heat-sealed and closed, whereby the plastic cardboard and the mounting member are integrated, and various parts are mounted on the plastic cardboard via the mounting member. According to this, in addition to the joining by the heat welding, the attaching member and the plastic cardboard are bent integrally, so that the attaching member does not come off and exhibits excellent joining strength.

Further, as described in the third aspect, the box in which the locking component is attached to the plastic cardboard lid by the above-described attachment structure has sufficient strength without using metal studs or needles. The lid can be locked with the, and the cost is low.

[Brief description of the drawings]

FIG. 1 is a perspective view of a box.

FIG. 2 is a sectional view of a box showing a main part.

FIG. 3 is an exploded perspective view of a lid and a locking part.

FIGS. 4A to 4C are cross-sectional views illustrating a method of mounting a mounting component.

FIG. 5 is a cross-sectional view showing another embodiment of the locking portion of the box body.

FIG. 6 is a sectional view showing a main part of the box body.

FIG. 7 is a sectional view showing a main part of the box body.

FIG. 8 is a sectional view showing a main part of the box body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Box 2 ... Box main body 3 ... Lid 4 ... Plastic cardboard 4a ... Liner 4b ... Hollow part 5 ... Bottom plate 6a-6d ... Side plate 9 ... Locking part 13A ... Locking part (parts) 13B ... Handle part (parts) 13C ... Mold parts (parts) 13D ... Adapter parts (parts) 14 ... Mounting members 16 ... Bend grooves

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 22:00 31:60

Claims (3)

[Claims] 1. A plastic corrugated cardboard having a large number of hollow portions partitioned by a core between two synthetic resin liners, the hollow portions being integrally formed with parts such as handle parts. A component mounting structure on a plastic cardboard, wherein a mounting member made of a thermoplastic resin is loaded, and the mounting member and the plastic cardboard are heat-welded. 2. The method according to claim 1, wherein a bent groove is formed in one liner and the mounting member of the plastic cardboard and bent, and the cut ends of the bent groove are closed by heat welding. Parts mounting structure to plastic cardboard. 3. A box body having a side plate erected on a bottom plate,
A combination of a plastic cardboard lid for covering the upper surface of the box body, wherein the box body is provided with a locking portion, and a locking part for locking the lid is engaged with the locking portion. 3. A box having a lid made of plastic cardboard, which is attached to the lid with the attachment structure according to 2.