JP3887471B2 - Parts mounting structure for plastic corrugated cardboard, box having plastic corrugated cardboard lid and plastic corrugated cardboard box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an attachment structure for attaching parts such as a handle part to a plastic corrugated cardboard, a box having a plastic corrugated cardboard lid to which a locking part for fixing a lid is attached, and the plastic corrugated cardboard. Regarding the box .
[0002]
[Prior art]
Conventionally, in order to attach a component such as a handle portion made of a synthetic resin to a plastic corrugated cardboard, a method of stopping with a metal hook or needle is generally used.
[0003]
[Problems to be solved by the invention]
However, the method of stopping a component by driving a metal coral or needle into a plastic corrugated cardboard has poor workability, and has the problem of extra labor and cost.
[0004]
[Means for Solving the Problems]
The present invention has been made in view of the above. For a plastic corrugated cardboard in which a large number of hollow portions partitioned by a central core are connected between two synthetic resin liners, the plastic corrugated cardboard is provided outside the end face of the plastic corrugated cardboard. the component mounting structure for mounting a separate part, the parts are butt main body in contact with the outer end face of the plastic cardboard, the trailing edge of the main body a can be inserted into the hollow portion of the plastic cardboard A mounting member made of a thermoplastic resin, and the main body of the component is brought into contact with the end surface of the plastic cardboard on the side where a large number of the hollow portions are arranged side by side, and the mounting of the component to the hollow portion of the plastic cardboard is further performed Provided is a component mounting structure on a plastic cardboard in which members are loaded and the mounting member and the plastic cardboard are thermally welded. According to this component mounting structure, various components can be mounted on the plastic cardboard via the mounting member.
[0005]
Further, as described in claim 2, also the cut of the folding grooves with bent to form a bent groove in the mounting member and a single liner of the plastic cardboard so as fit close thermal welding it can. Thus, when the cut end of the bent groove is heat-sealed and closed, the plastic cardboard liner and the mounting member are fused and cured, and the mounting member is refracted integrally with the plastic cardboard. Due to the synergistic action of refraction, the mounting member does not come off the plastic cardboard. Accordingly, the component is firmly attached to the plastic corrugated board via the attachment member.
[0006]
Also, as described in claim 3, the box body formed by upright side plates on the bottom plate, a combination of a plastic cardboard lid covering the upper surface of the box body, the locking the box body A box is provided in which a locking part for locking the lid that engages with the locking part is attached to the lid with the mounting structure. In this box, the locking part of the lid is engaged with the locking part of the box body so as not to open the lid. The locking part is attached to the plastic cardboard lid. Because it is attached in a structure, it has sufficient strength without using metal rivets and needles.
[0007]
According to a fourth aspect of the present invention, the box body formed by standing the side plate on the bottom plate is formed of plastic corrugated cardboard, and the handle part attached to the upper side surface of the side plate has the mounting structure according to the first or second aspect. An attached plastic cardboard box is provided.
[0008]
According to a fifth aspect of the present invention, there is provided the mounting structure according to the first or second aspect, wherein the molding body is attached to the end surface of the plastic corrugated board by forming a box body having a side plate upright on the bottom board. An attached plastic cardboard box is provided.
[0009]
Furthermore, as described in claim 6, an adapter part for attaching a molding member to which a box body formed by standing a side plate on a bottom plate is formed of plastic corrugated cardboard and fitted to an end surface of the plastic corrugated cardboard card. Alternatively, a plastic cardboard box is provided which is attached with the attachment structure described in 2.
[0010]
First Embodiment of the Invention
Embodiment 1 of the present invention will be described below for a box. 1 is a perspective view of the box, FIG. 2 is a sectional view of the box showing the main part, FIG. 3 is an exploded perspective view of the lid and the locking parts, and FIGS. 4A to 4C are mounting methods of the mounting parts. FIG. 5 is a cross-sectional view showing another embodiment of the locking portion of the box body.
[0011]
As shown in FIG. 1, the box 1 includes a square box body 2 and a lid 3 that covers the upper surface of the box body 2 so as to be freely opened and closed. The box body 2 is a foldable structure using a plastic corrugated cardboard 4, and side plates 6 a to 6 d constituting peripheral walls are arranged on four sides of a rectangular bottom plate 5, and two side plates 6 a and 6 c facing each other are centered on the upper edge thereof. The remaining two side plates 6b and 6d can be folded in a folding manner around the central folding line 7 and can be folded into a flat state by a combination of such side plates 6a to 6d.
[0012]
As is well known, the plastic corrugated board 4 is partitioned by a large number of cores between two liners 4a and 4a made of a synthetic resin (for example, polypropylene, polyethylene, etc.) having a thickness of about 0.4 mm, for example. The hollow portion 4b is continuously provided, and the entire thickness is about 5 mm. Each hinge portion (upper edge of the folding line 7 and the side plates 6a and 6c) of the side plates 6a to 6d is provided with a score line leaving only one liner 4a of the plastic corrugated cardboard 4, and the remaining one liner 4a. Is bent.
[0013]
Molded members 8a to 8d made of synthetic resin are fitted on the upper edges of the side plates 6a to 6d. The molding members 8a and 8c provided on the upper edges of the side plates 6a and 6c have a well-known structure with a U-shaped cross-section, and the side plates 6a and 6c are fitted in grooves that open downward. Further, 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 has a hook-like locking portion 9 protruding from the outer lower edge. The side plate 6b is fitted in a groove that opens downward. Furthermore, as shown in FIG. 2, the molding member 8d provided on the upper edge of the side plate 6d has a structure in which the sub-grooves 11 opened in the opposite direction (upward) are provided in parallel to the side grooves 10 for the side plate. Yes, the side plate 6d is fitted in the main groove 10.
[0014]
The molding members 8a to 8d are connected to each other by four corner members 12, 12. Each corner member 12 is an integrally molded product of synthetic resin, and is an L-shaped horizontal plate 12a, two pieces of clamp plates 12b and 12b that are hanged downward from both side edges of the horizontal plate 12a, and a horizontal plate It consists of a surrounding frame 12c projecting upward on the outer edge of 12a. The two pieces of clamp plates 12b and 12b have an interval and a height over the molding members 8a to 8d.
[0015]
On the other hand, the lid 3 is made of the same plastic corrugated cardboard 4 as the box body 2, and is fixed to the lid main plate 3a for closing the upper surface of the box body 2 and to the rear side edge of the lid main plate 3a via the hinge portion 3b. It consists of a piece 3c and a lid stopper piece 3d, which will be described later, provided on the front side edge of the lid main plate 3a. The fixed piece 3c is fitted in the sub-groove 11 of the molding member 8d and is attached to the box body 2 so that it can be opened and closed. The hinge portion 3b between the lid main plate 3a and the fixed piece 3c has a bent groove cut into a V shape, leaving one liner 4a of the plastic cardboard 4.
[0016]
As described above, the lid 3 is provided with the lid stopper piece 3d that bends downward at an angle of 90 degrees at the front edge of the lid main plate 3a. The lid stopper piece 3d has a hook-shaped locking part 13A attached to the tip, and the locking part 13A engages with the locking part 9 of the molding member 8b as shown in FIG. Lock 3 strongly. Therefore, even if the air bag is inserted into the box body 2 together with glass or ceramic items, and the air bag is inflated to prevent movement or damage of the items, the internal pressure of the air bag can be reduced. Thus, the lid 3 does not open. Note that engagement / release of the locking component 13A and the locking portion 9 can be performed by elastically deforming the lid stopper piece 3d.
[0017]
Next, a method for attaching the locking component 13A will be described. First, as shown in FIG. 3, rod-like attachment members 14 made of thermoplastic resin (for example, polypropylene, polyethylene, etc.) are protruded from the locking part 13 </ b> A at appropriate intervals as shown in FIG. 3. Each of the attachment members 14 has a thickness that fits into the hollow portion 4b of the plastic corrugated 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 the lid stopper piece 3d is bent.
[0018]
Next, as shown in FIG. 4A, all the attachment members 14 of the locking parts 13 </ b> A are loaded (inserted) into the hollow portion 4 b of the plastic cardboard 4. Then, the V-shaped blade 15 heated to about 250 ° C. to 300 ° C. is pressed against the folding line of the plastic corrugated cardboard 4 (see the imaginary line L in FIG. 3) as shown in FIG. A bent groove 16 having a depth that does not reach the depth is formed. Since the attachment member 14 passes under the folding line L, the V-shaped blade 15 also forms a bending groove 16 in the attachment member 14. Since the cut end of the bent groove 16 is melted by the heat of the V-shaped blade 15, the bent groove 16 is closed as shown in FIG. When the temperature is lowered 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 joined together. As a result, the lid stopper piece 3d is bent at 90 degrees with respect to the lid main plate 3a, and the locking component 13A is attached to the lid 3.
[0019]
In the first embodiment, the locking portion 9 of the box body 2 uses the lower end edge of the molding member 8b as shown in FIG. 5, or has a through-hole formed in the side plate 6b so as to be locked there. You may make it hook 13A.
[0020]
Second Embodiment of the Invention
FIG. 6 is a cross-sectional view showing the second embodiment. The component of the second embodiment is a handle component 13 </ b> B that is attached to the upper part of the side surface of the box body 2. In the handle part 13B, the mounting member 14 projects integrally 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 corrugated board 4 and the mounting member 14, and the two plastic corrugated boards 4 are stacked. Bend it so that In addition, you may make it reinforce the part of the point P in FIG. 6, for example by ultrasonic welding.
[0021]
Embodiment 3 of the Invention
FIG. 7 is a cross-sectional view showing the third embodiment. The component of the third embodiment is a molding component 13C attached to the bottom plate 5 side of the box body 2 of the first embodiment, and the mounting member 14 protrudes integrally from the main body of the molding component 13C. Then, similarly to the first embodiment, the V-shaped blade 15 is used to form a V-shaped bent groove 16 in the plastic corrugated cardboard 4 and the mounting member 14, and the end of the bottom plate 5 is bent at 90 degrees.
[0022]
As mentioned above, although this invention was demonstrated about Embodiment 1-3, this invention is naturally not limited to said each embodiment. For example, in the first to third embodiments, the plastic corrugated cardboard 4 and the mounting member 14 are provided with the bent groove 16 and thermally welded at the bent portion. However, as shown by the broken line in FIG. The ultrasonic welding machine 17 may be pressure-bonded to the outside of the two, and the two liners 4a and 4a and the attachment member 14 may be thermally welded by ultrasonic waves. Moreover, although Embodiment 1-3 demonstrated the box 1 using the plastic cardboard 4, the component attachment structure of this invention is applicable with respect to all the products which use the plastic cardboard 4. FIG. The plastic corrugated cardboard 4 may be manufactured by a known pasting and forming method in addition to the one manufactured by the integral extrusion method shown in the figure.
[0023]
Further, as shown in FIG. 8, the mounting member 14 may be projected from the adapter part 13D and attached to the plastic cardboard 4, and the molding member 8e or the like may be attached via the adapter part 13D.
[0024]
【The invention's effect】
As described above, the component mounting structure of the present invention can mount various components to the plastic cardboard via the mounting member. In particular, when all the metal ridges and needles are changed to the mounting structure of the present invention, it becomes possible to make the plastic corrugated cardboard product 100% synthetic resin. By doing so, when a used plastic corrugated cardboard product is recycled (for example, pulverized into oil), a high cost advantage is exhibited. By the way, when recycling plastic corrugated cardboard products using metal baskets and needles, it is necessary to remove them in advance, and the removal process is a factor that raises the recycling cost.
[0025]
Further, as in claim 2, if the cut end of the bent groove is welded and closed, the plastic cardboard and the mounting member are integrated, and various parts are attached to the plastic cardboard via the mounting member. In addition to joining by heat welding, the mounting member and the plastic corrugated board are integrally refracted, so that the mounting member cannot be removed and exhibits excellent joint strength.
[0026]
In addition, as described in claim 3, a box in which a locking part is attached to the plastic cardboard lid with the above-described attachment structure can be secured with sufficient strength without using a metal cage or needle. It can be locked and is low cost.
[Brief description of the drawings]
FIG. 1 is a perspective view of a box.
FIG. 2 is a cross-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 for explaining a mounting method of mounting parts.
FIG. 5 is a cross-sectional view showing another form of the locking portion of the box body.
FIG. 6 is a cross-sectional view showing the main part of the box body.
FIG. 7 is a cross-sectional view showing the main part of the box body.
FIG. 8 is a cross-sectional view showing the main part of the box body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Box 2 ... Box main body 3 ... Cover 4 ... Plastic cardboard 4a ... Liner 4b ... Hollow part 5 ... Bottom plate 6a-6d ... Side plate 8a-8d ... Mold member 9 ... Locking part 13A ... Locking part (component)
13B ... Handle parts (parts)
13C ... Mall parts (parts)
13D: Adapter parts (parts)
14 ... Mounting member 16 ... Bending groove

Claims (6)

Component mounting structure for mounting a separate component on the outside of the end face of a plastic corrugated cardboard, with a large number of hollow sections partitioned by a core between two synthetic resin liners. Because
The component comprises a main body that contacts the outside of the end face of the plastic cardboard, and a thermoplastic resin mounting member that can be inserted into the hollow portion of the plastic cardboard and protrudes from the rear edge of the main body.
The body of the component is brought into contact with the end surface of the plastic cardboard on the side where a large number of the hollow portions are arranged side by side, and the mounting member for the component is further loaded into the hollow portion of the plastic cardboard, and the mounting member and the plastic cardboard are heated. Parts mounting structure on plastic corrugated cardboard, characterized by welding. 2. The plastic corrugated board according to claim 1, wherein a bent groove is formed in one liner of the plastic corrugated board and the mounting member and bent, and the cut end of the bent groove is heat-sealed and closed. Part mounting structure.   A combination of a box main body in which a side plate is erected on a bottom plate and a plastic cardboard lid that covers the upper surface of the box main body. A box having a plastic corrugated cardboard lid, wherein a latching part for fitting the lid is attached to the lid by the mounting structure according to claim 1. 3. A plastic corrugated board made of plastic corrugated board, wherein a box body formed by standing a side board on a bottom board is formed of plastic corrugated board, and a handle part attached to the upper side of the side board is attached by the mounting structure according to claim 1 or 2. Box. 3. A plastic corrugated board made of plastic corrugated board, wherein a box body formed by standing side plates on a bottom board is formed of plastic corrugated board, and a molding part attached to the end face of the plastic corrugated board is attached with the mounting structure according to claim 1 or 2. Box. A box body formed by standing a side plate on a bottom plate is formed of plastic corrugated cardboard, and an adapter part for mounting a molding member to be fitted to an end surface of the plastic corrugated cardboard is attached by the mounting structure according to claim 1 or 2. Characteristic plastic cardboard box.

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