JP3326393B2 - Method for manufacturing container lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a lightweight and high-strength container lid.

[0002]

2. Description of the Related Art Conventional containers used for packing articles are mostly boxes made of mesh such as wire mesh, wooden or veneer boxes, or iron boxes. Most of the materials are assembled by combining members made of wood, metal, and plastic materials, and these are mounted on a pallet for use.

[0003] Containers using the above-described composite materials are made robust in order to ensure strength against a required load.

[0004] Therefore, when disposing, recycling or recycling, it is troublesome to disassemble, and at the same time, it requires a high degree of separation at the time of dismantling. In particular, plastics made of inexpensive PVC resin are used. Therefore, dioxin may be generated during incineration, and there has been a major problem in separation, disposal, and recycling in this technical field.

[0005] On the other hand, by using PP (polypropylene, hereinafter abbreviated as PP) as the resin instead of the above-mentioned PVC, the generation of dioxin can be prevented. It is effective for recycling and resource saving.

[0006] However, when integrally molded by injection molding in order to make PP, a sufficient thickness is secured to obtain the required strength, the amount of resin used is large, the weight is heavy, and the material is also low. The manufacturing cost has been extremely high.

[0007] The same applies to a lid for a container. In order to support the entire load in a stacked state, it is necessary to secure a wall thickness and to design a reinforcing rib.

Further, there are various sizes of containers, but if various types of molds are designed in accordance therewith, the cost of the molds becomes high, and it is difficult to produce various kinds in small quantities according to user requirements. It was not possible and was limited to those of standard dimensions.

[0009]

By the way, the applicant of the present invention has previously developed a panel made of PP called trade name "Damplate". This panel is a hollow core consisting of a number of parallel ribs and upper and lower liners, and is a lightweight and high-strength panel material.A container in which this hollow core panel is assembled in a box shape is lightweight, high-strength and inexpensive It has the advantage of using less resin, and is a container material suitable as a measure against dioxin.

In addition, the present applicant first cuts the above-mentioned material as a bottom plate and a side plate into required vertical and horizontal dimensions, and combines a frame edge and upper and lower corner materials around the cut material to obtain various types according to an order. We have developed a container assembly system that can obtain large, lightweight and high-strength containers.

The present invention relates to the above-mentioned lightweight container, and manufactures a lightweight and high-strength container lid suitable for the lightweight container.
It provides a method .

[0012]

In order to achieve the above object, the present invention provides a flat lid made of a polypropylene hollow core panel comprising upper and lower liners integrally formed on both sides of a rib. Material is the vertical and horizontal dimensions of the container
And reinforce the outer periphery of the lid material
According to the vertical and horizontal dimensions of the lid material
Cut, insert and fix the frame edge around the lid material,
The four corners of the cover material are injection-molded with polypropylene along with the frame
It is characterized in that it is fitted and fixed by a corner material composed of a shape .

According to the above arrangement, the lid having the vertical and horizontal dimensions conforming to the container dimensions can be immediately formed simply by cutting the lid into the vertical and horizontal dimensions of the container opening and attaching the corner material. Since it is all PP, there is no problem of recycling or separation at the time of recycling, and there is no danger of generating dangerous dioxin even during incineration.

Further, a frame edge for inserting and fixing the lid material is provided around the lid material, and four corners of the lid material are fitted and fixed together with the frame edge by the corner material, so that the peripheral reinforcement and the cosmetics can also be used. .

Further, a support block for supporting the bottom of the container stacked on the corner material is integrally formed on the upper part of the corner material, so that the upper load can be supported by the corner material, and the weight can be reduced. In addition, the required load strength can be sufficiently secured.

[0016]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Figure 1
FIG. 5 shows a first embodiment of a method for manufacturing a container lid according to the present invention.

The lid 4 shown in FIG. 1 includes a lid member 1, a frame edge 2 fixed to four sides of the lid member 1, and four corners of the lid member 1.
And a corner material 3 fitted and fixed.

As shown in FIG. 2, the lid member 1 is integrally melt-extruded into a cross-sectional shape having a rib and a liner, which was previously developed by the present applicant, and is hollowed out by cooling and solidifying the same. Panel (trade name: Ube Nitto Kasei Co., Ltd .: preferably a dam plate), or PP foam plate material having relatively low expansion ratio and rigidity (for example, trade name: Mitsui Toatsu Platec: Paronia Super is used. ) Is a lightweight and high-strength panel material having a predetermined thickness, such as a vertical and horizontal dimension corresponding to the vertical and horizontal dimensions of the target container.

As shown in FIG. 3, the frame edge 2 is made of an extruded product made of PP or aluminum, and is extruded into a substantially F-shaped cross section. By attaching the outer cover to the outer peripheral portion, the outer cover is used for both appearance and reinforcement, and is formed of four members cut according to the vertical and horizontal dimensions of the lid member.

The corner member 3 is made of an injection-molded product made of PP. As shown in FIG. 4, an L-shaped fitting portion 3a for fitting a corner of the lid 1 and a fitting portion 3a And a support block 3c formed integrally with the upper part of the fitting part 3a to form an L-shape and integrally formed with a large number of triangular reinforcing ribs inside. The skirt portion 3d extends in an L-shape below the fitting portion 3a and surrounds the outside of the corner of the container described later.

As a means for connecting the above members, although not shown, a plurality of resin clips or rivets made of PP are attached through the fitting portion 3a, the lid member 1, and the upper and lower sides of the frame, and are attached as shown in FIG. As shown, each part is integrated, and a lightweight lid 4 according to the lightweight of the lid material 1 is assembled.

FIG. 5 shows a state in which the containers 5 with the above-mentioned lids 4 attached are stacked, and the target container 5 is a hollow panel developed by the present applicant as a bottom plate and side plates. A PP-integrated composite container in which the frame edge is fitted to the edge and the corners are reinforced with upper and lower corner materials, etc. is recommended, but an integrated container made of synthetic resin injection molding or other materials Can be adapted to configured containers. The PP-integrated composite container will be described in the following embodiment.

In this stacked state, the four bottom corners of the upper container 5 are seated on the support block 3c of the corner material 3,
Even if the load on the upper container 5 is considerably large, the support block 3c supports the load on the upper container 5 according to the strength of the corner member 3.

In the above lid 4, the lid 1 is cut in accordance with the vertical and horizontal dimensions of the container, and the frame edge is cut into two long sides and two short sides. Thus, it can be assembled together with the corner material 3 and can be immediately adapted to orders according to various dimensions.

FIGS. 6 to 8 show a second embodiment in which the manufacturing method of the present invention is applied to the aforementioned PP-integrated composite container.

In the figure, a container 10 comprises a lower corner material 11 and an upper corner material 12 made of a PP injection molded body,
A vertical frame 13 connected between these corner members 11 and 12 and a bottom plate 14 made of the same hollow core panel as described above.
And a side plate 15 and upper and lower horizontal frames 16 as reinforcing frame edges fitted to the upper edge and the side edge of the side plate 15.

Of the above members, the upper corner material 12 is formed by the PP frame 17 and the side frame 1
5 and a supporting frame 12a for stacking is integrally protruded from the outer periphery of the corner portion to improve the stability when the same container is stacked in multiple stages as shown in FIG. I'm trying.

The lid 18 for closing the upper opening of the container 10 has a lid member 19 made of the same hollow core panel cut into the inner dimension of the upper opening of the container 10 and four corners of the lid member 19. It is composed of a corner member 20 to be fitted, and a frame edge 21 fixed to four sides of the lid member 19.

The corner member 20 has a substantially L-shape in plan view and has an R surface and is made of an injection-molded product made of PP. As shown in FIG. 6, a corner of the cover member 19 is fitted inside the corner member 20. A fitting portion 20a for fitting the frame edge 21 is formed at the lower portion on the outside, and the corner material 12 is formed on the outer peripheral portion.
A notch 20c is formed to avoid interference with the support frame 12a.

Further, on both sides of the notch 20c, as shown in FIG. 7, a locking claw which is resiliently fitted to the corner member 20 while being fitted to the corner member 20 and locks the lid 18 in a closed state. 22 are formed on the outer periphery of the corner member 12 on the container 10 side corresponding to the locking claws 22, respectively.
2b is formed so as to protrude, and the lid 18 is placed at the opening of the container 10, and by strongly pressing the four corners, the locking claw 22 rides over the locking part lock 12b with a click sound of snapping, and the lid is closed. It locks, thereby preventing the lid 18 from falling out of the container. When the cover is opened, the lock can be easily released simply by pulling up the cover 18 with a slightly strong force.

Accordingly, the above-mentioned lid 18 cuts the lid material 19 vertically and horizontally according to the inner dimensions of the opening of the container 10,
The frame material 21 is fitted around the four circumferences, and corner materials 20 are provided at the four corners.
Can be completed simply by fitting them, so that the structure can be further simplified. In addition, when assembling and connecting each member,
As shown, the same PP resin clip 17 or rivet as the container 10 is recommended.

[0032]

As is apparent from the above description, the method for manufacturing a container lid according to the present invention has the following advantages.

A hollow core panel made of PP is used as a main lid material, and even if the container itself is out of the standard, the lid can be adapted only by cutting to the dimensions, so that it is highly responsive to orders.

Since it is made of all-PP in combination with the composite container made of PP, there is no need for separation at the time of disposal and recycling, and there is no possibility of generating dioxin during incineration.

While having sufficient strength and rigidity, the advantage of the panel material itself is light weight, the amount of resin used is small, it can be manufactured at low cost, and the corners and the like have sufficient strength, and the overall strength in the assembled state is high. .

[Brief description of the drawings]

Is a plan view and a side cross-sectional view of the container <br/> Na lid which Ri produced by the first embodiment of the invention; FIG

FIG. 2 is a perspective view showing a partially enlarged portion of a hollow core panel used for the lid.

FIG. 3 is a three side view of a frame edge used for the lid.

FIG. 4 is a perspective view of a corner material used for the lid.

FIG. 5 is a perspective view showing a relationship between the lid and a container.

6 is a partial perspective view showing the relationship between I Ri manufactured lid and container to a second embodiment of the present invention.

FIG. 7 is a partial perspective view when the lid and the container are viewed from the outside.

FIG. 8 is an exploded perspective view showing a relationship between containers and lids stacked in the same stage.

[Explanation of symbols]

 1,19 Lid (hollow core panel) 2 Frame edge 3,20 Corner 3c Support block 5,10 Container 4,18 Lid 22 Locking pawl

Continuation of front page (56) References JP-A-2-80222 (JP, A) JP-A-10-114319 (JP, A) JP-A-62-174031 (JP, U) US Patent 5,265,797 (US, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 43/00-43/26 B65D 21/02-21/06 WPI / L (QUESTEL)

Claims (2)

(57) [Claims] 1. A container in which a flat lid member made of a polypropylene hollow core panel made of upper and lower liners integrally formed on both sides of a large number of ribs with a plurality of ribs interposed therebetween is arranged in the vertical and horizontal dimensions of the container.
And reinforce the outer periphery of the lid material
According to the vertical and horizontal dimensions of the lid material
Cut, insert and fix the frame edge around the lid material, and inject polypropylene at the four corners of the lid material with the frame edge.
A method for manufacturing a container lid , wherein the lid is fitted and fixed by a corner material formed of a molded body . 2. A locking claw projecting around the corner material.
The lid for containers according to claim 1 which engages resiliently engaged around the container, characterized in the lock to Turkey the closed state
Manufacturing method .