JP3227758U - Resin cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate-shaped resin cover to be attached to an opening of a box-shaped container, which is excellent in heat insulating property and light-shielding property, has high durability, and is easy to handle.
SOLUTION: A resin cover 1 is composed of a pair of plate members 2 divided into two in a plan view. The plate member 2 has a base material made of foamed resin and a resin sheet that covers the base material. The plate member has a thick portion that is fitted into the opening of the container and a flange portion that is formed in a stepped manner from the thick portion and placed on the peripheral edge of the container. The plate member also has overlapping pieces 25, one of which overlaps the other.
[Selection diagram] Fig. 1

Description

The present invention relates to a plate-shaped resin cover attached to the opening of a box-shaped transport container having an open side.

Conventionally, a transport container made of foamed resin, which is lightweight and has high heat insulating properties, has been used for transporting live fish (see, for example, Patent Document 1). However, when transporting live fish, it is necessary to fill the container with a large amount of water together with the live fish, so when transporting large fish or a large number of fish in a live state, it is generally better than foamed resin. Also, a highly rigid plastic transport container is used (see, for example, Patent Document 2).

This type of plastic container has a box-shaped container body with an open top surface and a plate-shaped cover attached to the opening of the container body. The rigidity of the container body is reinforced by a large number of ribs provided so as to be orthogonal to the surface forming the side surface of the container, and the cover is also provided with the same reinforcing ribs. By providing these reinforcing ribs, it is possible to suppress an increase in the thickness of the surface itself forming the container or the cover, and it is possible to obtain rigidity that can withstand a load when a large amount of water is filled.

JP-A-2007-244347 Jikkenhei 6-44750

However, the cover used for the plastic container has a thin cover itself except for the rib portion and has low heat insulating property. In addition, since the cover is thin, light such as sunlight is slightly transmitted. When the inside of the container becomes bright, the movement of live fish becomes active, and there is a risk of damage during transportation. On the other hand, if the thickness of the cover is increased, the weight of the cover is increased. When transporting a large fish or a large number of fish, one side of the container is 1000 mm or more, and the size of the cover is correspondingly large. Therefore, if the weight of the cover is increased, it becomes difficult to handle the cover. Moreover, the plastic material cannot be expected to improve the heat insulating property.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a resin cover which is excellent in heat insulating property and light shielding property, has high durability, and is easy to handle.

In order to solve the above problems, the present invention is a plate-shaped resin cover attached to the opening of a box-shaped container having one side open, and is composed of a pair of plate members divided into two in a plan view. The plate member is characterized by having a base material made of foamed resin and a resin sheet that covers the base material.

In the resin cover, the plate member preferably has a thick portion fitted into the opening of the container and a flange portion formed in a stepped manner from the thick portion and placed on the peripheral edge of the container.

In the resin cover, the plate member preferably has overlapping pieces, one of which overlaps the other.

In the resin cover, the pair of plate members preferably have the same shape as each other.

According to the resin cover according to the present invention, since it is composed of a pair of plate members, the size and weight of the plate member alone are halved as compared with the one-piece cover, and the operator can easily handle the cover. .. Further, since the resin sheet is coated on the base material made of foamed resin, excellent surface strength and high durability can be realized as compared with the one in which the foamed resin is exposed.

(A) A perspective view mainly of the front surface and a flat surface of the resin cover according to the embodiment of the present invention, (b) is an exploded perspective view of (a), and (c) is a back surface and a bottom surface of the resin cover. Main perspective views, (d) is an exploded perspective view of (c). (A) is a perspective view mainly of the front surface and a flat surface of the plate member constituting the resin cover, and (b) is a perspective view mainly of the back surface and the bottom surface of the plate member. (A) is a plan view of the plate member, (b) is a plan view, (c) is a bottom view, (d) is a right side view, and (e) is a left side view. FIGS. (A) to (F) are diagrams for explaining a process of vacuum-integrating a resin sheet on the plate member. (A) A perspective view mainly of the front surface and a flat surface of the resin cover according to the deformability of the above embodiment, (b) is an exploded perspective view of (a), and (c) is a back surface and a bottom surface of the resin cover. Main perspective views, (d) is an exploded perspective view of (c). (A) is a perspective view mainly of the front surface and a flat surface of one of the plate members constituting the resin cover, and (b) is a perspective view mainly of the back surface and the bottom surface of the plate member. (A) is a perspective view mainly of the front surface and a flat surface of the other plate member constituting the resin cover, and (b) is a perspective view mainly of the back surface and the bottom surface of the plate member.

The resin cover according to the embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1A and 1C, the resin cover 1 of the present embodiment is a plate-shaped structural member attached to the opening of a box-shaped container having an open side, and is on the front and back sides. The sides are rectangular in plan view, which are longer than the sides on both sides.

Further, as shown in FIGS. 1B and 1D, the resin cover 1 is composed of a pair of plate members 2 divided into two in a plan view, and these can be connected and separated. In the plate member 2 alone, the sides forming the front surface and the back surface of the resin cover 1 are shorter than the sides forming both side surfaces, and are rectangular in a plan view.

The plate member 2 will be described with reference to FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) to 3 (e). In FIGS. 2 and 3, the connecting surface of the plate member 2 shown in FIG. 2 is the front side, and the side forming the side surface of the resin cover 1 is the back side. The plate member 2 has a base material 3 made of foamed resin molded into a predetermined shape and a resin sheet 4 that covers the base material 3 (see FIG. 4 described later).

In the plate member 2, the outer layer portion 21 forming the outer surface of the resin cover 1 and the inner layer portion 22 forming the inner surface of the resin cover 1 are integrally molded, and the outer layer portion 21 is more than the inner layer portion 22. It is large and extends in a brim shape with respect to the inner layer portion 22. While the inner layer portion 22 is substantially rectangular (see FIG. 3 (c)), the outer layer portion 21 has an irregular shape in which half of the connecting surface is cut out (FIG. 3 (a)). ). When the inner layer portion 22 is attached to the opening of the container, the inner layer portion 22 is fitted into the opening, and the bottom surface side of the flange-shaped extending portion of the outer layer portion 21 (hereinafter referred to as the collar portion 23) is placed on the peripheral edge of the container. Will be done. The width of the collar portion 23 is defined according to the size of the peripheral edge of the container to which it is applied, and is preferably 60 to 80 mm, for example.

In the present embodiment, the thicknesses of the outer layer portion 21 and the inner layer portion 22 are substantially the same, and the portion where the outer layer portion 21 and the inner layer portion 22 overlap (hereinafter, the wall thickness portion 24) is twice as thick as the collar portion 23. Become. The thickness of the outer layer portion 21 and the inner layer portion 22 is preferably 15 to 45 mm, respectively, and the thickness of the wall thickness portion 24 is preferably 45 to 75 mm. As described above, the resin cover 1 is mainly composed of the foamed resin base material 3, and the thick portion 24 fits into the opening of the container, so that excellent heat insulation and light shielding properties can be realized. Can be done.

The thicknesses of the outer layer portion 21 and the inner layer portion 22 may be different from each other. However, if the outer layer portion 21 is too thick, the height on the container becomes too high, and if it is too thin, the strength of the collar portion 23 decreases. Further, if the inner layer portion 22 is too thick, it will press the internal space of the container. Therefore, the thickness of the outer layer portion 21 and the inner layer portion 22 is 25 to 35 mm, respectively, and the thickness of the wall thickness portion 24 is most preferably 55 to 65 mm.

The plate member 2 has overlapping pieces 25, one of which overlaps the other. The overlapping piece 25 has an outer layer portion 21 extended on the connecting surface side with the other plate member 2, similar to the collar portion 23. In the present embodiment, the overlapping piece 25 is provided on one half of the connecting surface. A piece receiving portion 26 on which the overlapping piece 25 is covered is provided on one half of the connecting surface on which the overlapping piece 25 is not provided. The one-sided receiving portion 26 is a portion where the upper surface of the inner layer portion 22 is exposed from the cutout portion of the outer layer portion 21. If the extending length of the overlapping piece 25 is too short, the light-shielding property may be deteriorated, and if the extending length of the overlapping piece 25 is too long, the overlapping piece 25 is connected when the pair of plate members 2 are connected. It becomes difficult to insert the 25 into the one-sided receiving portion 26, and there is a risk that workability deteriorates. Therefore, the extending length of the overlapping piece 25 is preferably 40 to 60 mm.

In the resin cover 1 of the present embodiment, the overlapping piece 25 of one plate member 2 covers the piece receiving portion 26 of the other plate member 2, and the overlapping piece 25 of the other plate member 2 is one plate member 2. It covers the one-sided receiving portion 26 of. Therefore, there is no gap in the vertical direction on the connecting surfaces of the pair of plate members 2, and high light-shielding property can be obtained.

Further, in the present embodiment, since the resin cover 1 is composed of a pair of plate members 2, the size and weight of the plate member 2 alone are halved as compared with the one-piece cover. Therefore, the work of attaching the resin cover 1 to the container and the work of removing it need only carry a small and light plate member 2, and the operator can easily handle the resin cover. Further, the pair of plate members 2 have the same shape as each other. Therefore, when molding the base material 3 of the plate member 2, one mold may be used, and the manufacturing cost can be suppressed.

The material constituting the base material 3 is, for example, a foamed synthetic resin such as a polyolefin resin such as polystyrene, polyethylene, or polypropylene, and in this embodiment, expanded polystyrene (EPS (expanded polystyrene)) is used.

The material constituting the resin sheet 4 may be mainly composed of the same material as the base material 3, and a material having a density and hardness different from that of the base material 3 may be used. Examples of the material constituting the resin sheet 4 include polystyrene (PS), polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), and ethylene-vinyl acetate copolymer resin (EVA). , Polyethylene (PU), ABS resin, impact resistant polystyrene (HIPS) and the like.

Next, the step of vacuum-integrating the resin sheet 4 on the base material 3 will be described with reference to FIGS. 4A to 4F. As shown in FIG. 4A, a set table 103 is laid on the table 102 of the vacuum forming machine 101, and the base material 3 is arranged on the set table 103. Next, the resin sheet 4 is arranged between the lower chamber 104A and the upper chamber 104B. Next, as shown in FIG. 4B, the upper drive device 105A is driven to lower the upper chamber 104B. As a result, the resin sheet 4 is sandwiched between the lower chamber 104A and the upper chamber 104B. At this time, the inside of the chamber is sealed under atmospheric pressure.

Then, as shown in FIG. 4C, the vacuum tank 106 is driven to create a vacuum inside the chamber, and the heater 107 is turned on to heat the resin sheet 4. Next, as shown in FIG. 4D, the lower drive device 105B is driven to raise the table 102 in the lower chamber 104A. As a result, the resin sheet 4 is pressed against one surface of the base material 3.

Next, as shown in FIG. 4 (e), the compressed air tank 108 is operated to bring the inside of the chamber into an atmospheric pressure state (or a pressurized state) so that the resin sheet 4 covers the base material 3 without gaps ( Overlay). Then, with the inside of the chamber in an atmospheric pressure state, as shown in FIG. 4 (f), the upper chamber 104B is raised, and the plate member 2 in which the resin sheet 4 is vacuum-integrated with the base material 3 is taken out. As a result, the resin sheet 4 is coated on one surface of the base material 3. The above procedure is also performed on the other surface of the base material 3, and both of the base material 3 are coated with the resin sheet 4.

As described above, in the resin cover 1 of the present embodiment, since the resin sheet 4 is coated on the foamed resin base material 3, the surface strength and the durability are higher than those in which the foamed resin is exposed. Can be realized.

The resin cover according to the modified example of the above embodiment will be described with reference to FIGS. 5 to 7. As shown in FIGS. 5A to 5D, the resin cover 1 of this modified example is composed of a pair of plate members 2A and 2B divided into two in a plan view. Unlike the above embodiment, the plate members 2A and 2B have different shapes. The plate members 2A and 2B are integrally molded with the outer layer portion 21 forming the outer surface of the resin cover 1 and the inner layer portion 22 forming the inner surface of the resin cover 1, and the flange portion 23 and the wall thickness. The point of having the part 24 is the same as the above-described embodiment.

In this modification, as shown in FIGS. 6A and 6B, the overlapping piece 25 is provided only on one plate member 2A. Further, as shown in FIGS. 7A and 7B, the one-side receiving portion 26 is provided only on the other plate member 2B. In the above embodiment, the overlapping pieces 25 are connected so as to mesh with each other, but in this modification, the overlapping pieces 25 of one plate member 2A are mounted on the one-side receiving portion 26 of the other plate member 2B. Only.

In this modification, the sizes of the outer layer portions 21A and 21B of the plate members 2A and 2B are different in the state where the plate members 2A and 2B are connected. Therefore, for example, when the arrangement direction at the time of transportation is determined. Has an advantage that the direction of the resin cover 1 can be easily identified. Further, in the above embodiment, for example, when one plate member 2 is to be lifted, an overlapping piece of the other plate member 2 is placed on the one-side receiving portion 26 of the plate member 2, so that the other plate member 2 is placed. Will be lifted slightly. On the other hand, in this modification, since the overlapping piece 25 of one plate member 2A is only placed on the one-side receiving portion 26 of the other plate member 2B, simply lifting one plate member 2A is the other. Plate member 2B does not lift. Therefore, it is convenient when the resin cover 1 is to be opened slightly in order to check the contents.

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without changing the purpose of the invention. In the above embodiment, the plate member 2 has a two-layer structure of an outer layer portion 21 and an inner layer portion 22, but for example, the plate member 2 may have three or more layers and can be applied to containers having different inner dimensions. It may be. Further, although not shown in the above-described embodiment or modification, the resin cover 1 may be provided with a hole for passing a tube or a nozzle for sending air into the container.

1 Resin cover 2 Plate member 3 Base material 4 Resin sheet 23 Brim part 24 Thick part 25 Overlapping pieces

Claims (4)

A plate-shaped resin cover that is attached to the opening of a box-shaped container with one side open.
It consists of a pair of plate members divided into two in a plan view.
The plate member is a resin cover having a base material made of foamed resin and a resin sheet covering the base material. The plate member according to claim 1, wherein the plate member has a thick portion fitted into the opening of the container and a flange portion formed in a stepped manner from the thick portion and placed on the peripheral edge of the container. Resin cover. The resin cover according to claim 1 or 2, wherein the plate member has overlapping pieces on which one overlaps with the other. The resin cover according to any one of claims 1 to 3, wherein the pair of plate members have the same shape as each other.

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