JP5378100B2 - Resin molded product to be a container or lid - Google Patents

Description

 The present invention relates to a resin molded product molded using a synthetic resin as a material, and more particularly to a resin molded product serving as a container for storing an article or a lid covering the stored article.

 In recent years, when selling various articles, they are housed in a prepared container and wrapped, or the articles in the container are covered with a lid. If the article is protected by such a container or lid, it is convenient for the purchaser to take the article home, and if the article is food, it is hygienic.

Considering such a container or lid, for example, a large number of articles to be sold in a backyard of a supermarket are packed in a large case after so-called “packing” using the container or the lid, respectively. In many cases, it is more efficient when these containers and lids are based on a square or circular shape when they are placed side by side, or when this “packed” is stacked on a display shelf. In other words, this type of container or lid is convenient in all storage, display, and transportation situations when the “square” is the basic shape, and the back when the “circular” is the basic shape. It is often convenient for handling in the yard and taking home.

However, a container or lid based on a rectangular shape, in particular, has a square “corner”. This corner is easily deformed when it comes into contact with or hits another object, and if the deformation does not return immediately, there is a possibility that the article at that part may be deformed or discolored. . In particular, when this type of container or lid is formed by sheet molding using a thin synthetic resin sheet as a material, the deformation of the “corner” is inevitable, and in some cases, the discolored portion is discolored ( If the container or the lid is made of a transparent resin material, the actual situation is that the portion becomes cloudy white, so-called “white turbidity phenomenon” occurs. Of course, even in a container or lid based on a circular shape, the above-mentioned “corner” is formed between the bottom or top plate and the side wall.

Therefore, in Patent Document 1, “a thin plastic sheet (including a film, the same shall apply hereinafter) can be stacked with a container using a transparent lid, and transported (conveyed) in a closed state. In the exhibition, etc., the lid is stably attached, and the upper edge of the side of the main body is lowered, and conversely, the height of the side of the lid of the corresponding part is increased, thereby giving the container a volume feeling, A “transparent food container” has been proposed, which can enhance the display effect at the time of sale.

Japanese Patent No. 2967865, paragraphs 0004, 0005, 0008

 As shown in FIG. 11, “Paper Container with Transparent Lid” of the above-mentioned Patent Document 1 “forms an uneven rib strip of an appropriate length from the upper surface of the lid to the outside of the corner near the corner of the lid”. (Paragraph 0005), and as described in paragraph 0008, “an appropriate length of ribbed ribs from the top surface of the lid to the outside of the corner is formed in the vicinity of the corner of the lid. , More reliably preventing the corner from being pulled inwardly of the lid upper surface, and further improving the adhesion stability of the lid, which is located along the inner side of the corner upper edge. It is also possible to adopt a configuration in which a concave surface having an appropriate width that is slightly lower than the upper surface portion of the lid is formed.

However, the “concave rib” of Patent Document 1 is “formed in an appropriate length from the top surface of the lid to the outside of the corner near the corner of the lid” (paragraph 0005). It can only be further improved in stability, and does not fulfill the “proactive deformation prevention function” or “restoration function” at the corner near the corner.

Therefore, the present inventors have performed a "proactive deformation prevention function" and a "restoration function" in the vicinity of the corner of the container for storing and protecting articles and the lid of this type of container. As a result of various studies on what should be done, the present invention has been completed.

That is, an object of the present invention is to provide a container or a lid that can sufficiently perform a restoring function of positively deforming the vicinity of a corner and immediately returning to the original state, with a simple configuration. .

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
“A resin molded product 10 formed of a synthetic resin and serving as a container 10a or a lid 10b,
Between the side wall 12a connected to the flange 11 of the opening and the bottom surface 13a surrounded by the side wall 12a, or between the rising wall 12b connected to the flange 11 and the top plate surface 13b surrounded by the rising wall 12b. In addition, a groove portion 15 is formed, and a groove portion 15 having an outer surface 15a and an inner surface 15b having a slope that is looser than the inclination of the outer surface 15a is formed in the vicinity of all or part of the corner portion 14, and the groove portion. Resin molded product 10 characterized in that residual portion 16 is formed outside 15 ”
It is.

That is, the resin molded product 10 according to claim 1 is formed by various resin molding methods using synthetic resin as a material, such as injection molding, blow molding, or sheet molding, as shown in FIG. If it is used, the lid 10b is fitted into the opening of the container (not shown). If it is used upside down as shown in FIG. It becomes the container 10a. Hereinafter, the case where the resin molded product 10 according to the present invention is a lid 10b fitted to a container (not shown) will be mainly described.

Now, as shown in FIG. 1B, the resin molded product 10 according to claim 1 has a top plate surface 13b on the upper side of the flange 11 fitted to a container (not shown) via a rising wall 12b. As shown in FIG. 1A, the flange 11 has a rectangular shape in plan view. Accordingly, a total of four grooves 15 are present on the top plate surface 13b of the rectangular resin molded product 10, but the resin molded product 10 is circular in plan view as shown in FIG. In the case of the above, the number of grooves 15 (three in FIG. 7) can be determined as appropriate.

 In each corner near each corner 14, a groove that intersects a center line 14 a (shown only in the upper right corner in FIG. 1A) toward the approximate center of the resin molded product 10. 15 is formed. As shown in FIGS. 3 and 8, the groove portion 15 has a substantially V-shape when viewed in cross section by an outer surface 15 a and an inner surface 15 b connected at the lower end, and the outer surface 15 a ( The right side surface when viewed in FIG. 3 is steeper than the inner side surface 15b (right side surface when viewed in FIG. 3). When the groove 15 is formed in all or part of each corner 14, a part of the top plate surface 12 b remains as the remaining part 16. In the case of the example shown in FIG. 1, the remaining portion 16 has a triangular shape in plan view, but in the case of the example shown in FIG. 7, the residual portion 16 has a semicircular shape. Various shapes can be obtained depending on the shape.

In addition, since the outer side surface 15a and the inner side surface 15b constituting the groove portion 15 are connected to each other at an acute angle, they are substantially V-shaped when viewed in cross section. When connected in a curved manner at the lower end, it is substantially U-shaped when viewed in cross section.

Thereby, as shown in FIG. 1, in each corner portion 14 of the resin molded product 10, there are the groove portion 15 and the remaining portion 16, and each corner portion 14 is formed by these, the side wall 12a and the rising side wall 12b. The vicinity of is easily deformed.

When the resin molded product 10 as described above, that is, the lid 10b is fitted to a container (not shown) containing the contents and the container is moved with the lid 10b, it is held by hand, or this lid When a plurality of containers fitted with 10b are stacked, a force is applied to the top plate surface 13b of each lid 10b as shown on the right side of the black bidirectional arrow in FIG. As a result, the inner side surface 15b is expanded with respect to the outer side surface 15a along with the top plate surface 13b connected to the inner side surface 15b, and the left side portion of the inner side surface 15b is lowered, but the inner side surface 15b is slower than the outer side surface 15a. Since it is a slightly inclined surface, there is no deformation beyond the elastic deformation range.

 On the other hand, the outer side surface 15a is continuous with the remaining portion 16 of the corner portion 14 and has a steeper inclined surface than the inner side surface 15b. Therefore, the outer side surface 15a is connected to the inner side surface 15b continuous with the top plate surface 13b. If it compares, the rigidity with respect to the vertical direction in the direction of the white arrow of FIG. 8, ie, the corner | angular part 14 vicinity of the top-plate surface 13b, is high. For this reason, the outer surface 15a is connected to the rising wall 12b although there is a deformation that is pulled by the top plate surface 13b as shown on the right side of the black bidirectional arrow in FIG. There is no deformation beyond the elastic deformation range in view of the rigidity of the corner 14 itself. Of course, since the deformation is within the range of elastic deformation, discoloration generally called “white turbidity” does not occur in each deformed portion.

More importantly, the outer surface 15a and the inner surface 15b constituting the groove portion 15 were not deformed beyond the elastic deformation range when the pressing force on the top plate surface 13b disappeared. Therefore, as shown on the left side of the black bidirectional arrow in FIG.

 Therefore, even if the resin molded product 10 according to the first aspect is deformed at the corner portion 14, the resin molded product 10 can sufficiently perform the restoring function to immediately return to the original state.

Further, the means taken by the invention according to claim 2 is about the resin molded product 10 according to claim 1,
“Residual portion 16 is made to continue to incline with respect to side wall 12a or rising wall 12b”
It is.

That is, the resin molded product 10 according to claim 2 has a remaining portion left outside the groove portion 15 formed in all or a part of each corner portion 14 as shown on the left side of the black bidirectional arrow in FIG. 16, when the resin molded product 10 is the lid 10b, the resin molded product 10 is continuous while being inclined with respect to the rising wall 12b.

In this case, as shown on the right side of the black bidirectional arrow in FIG. 9, when a pressing force is applied to the top plate surface 13 b, the groove portion 15 and the remaining portion 16 are deformed, and the top plate The surface 13b is allowed to fall. Of course, since the residual portion 16 is originally inclined, it is easier to deform than the rising wall 12b, and the groove portion 15 is also configured as described above. Therefore, the deformation of the groove portion 15 and the residual portion 16 is as follows. The deformation is within the elastic deformation range of the synthetic resin constituting the lid 10b. Of course, since the deformation is within the range of elastic deformation, discoloration generally called “white turbidity” does not occur in each deformed portion.

And when the pressing force to the top plate surface 13b disappears, the groove portion 15 and the remaining portion 16 were not deformed so as to exceed the elastic deformation range, so on the left side of the black bidirectional arrow in FIG. As shown, it is elastically restored to its original state.

 Therefore, the resin molded product 10 according to claim 2 can also prevent deformation in the vicinity of the corner portion 14 and can sufficiently perform a restoring function to immediately return to the original state even if it is deformed. It is a thing.

Furthermore, the means taken by the invention according to claim 3 is about the resin molded product 10 according to claim 1 or claim 2,
“Reinforcement ribs 17 intersecting the groove portions 15 are formed on the remaining portion 16 or the outer surface 15a”
It is.

That is, as shown in FIGS. 1 and 10, the resin molded product 10 according to claim 3 includes a reinforcing rib 17 that intersects the corner portion 14 on the remaining portion 16 or the outer surface 15 a that remains at the corner of the corner portion 14. Is formed. Each reinforcing rib 17 literally reinforces the remaining portion 16, and the black bi-directional of FIG. 10 is generated by the force received from the top plate surface 13b that receives the pressing force or the rising wall 12b that is in contact with something. As shown on the right side of the arrow, the reinforcing rib 17 itself is deformed to deform the remaining portion 16 or the corner portion 14, and all of these deformations are within the range of elastic deformation of the synthetic resin as the material.

Each deformation of the corner portions 14 in the resin molded product 10, the groove portions 15 formed in all or a part of the corner portions 15, and the residual portion 16 outside the groove portions 15 forms the resin molded product 10. Within the range of the elastic deformation of the synthetic resin, reinforcing ribs 17 are formed in the remaining portion 16, grooves 15 are formed in the corner portions 14, and the corner portions 14 are raised walls. It is because it continues to 12b. In particular, the remaining portion 16 located in the outer portion of each corner portion 14 is a portion that easily contacts other objects, but the remaining portion 16 is formed with reinforcing ribs 17 and is reinforced. Because.

On the contrary, if the force applied to the top plate surface 13b and the corner portion 14 disappears, each corner portion 14, the groove portion 15, and the remaining portion 16 are restored to their original state by their own elasticity. It is. Of course, since the deformation is within the range of elastic deformation, discoloration generally called “white turbidity” does not occur in each deformed portion.

 Therefore, the resin molded product 10 according to the third aspect exhibits the same function as that of the first or second aspect, and each residual portion 16 is reinforced by the reinforcing ribs 17. Is sufficiently contained within the range of elastic deformation, and the pressed portion can be restored to its original shape without causing cloudiness.

As described above, in the present invention,
“A resin molded product 10 formed of a synthetic resin and serving as a container 10a or a lid 10b,
Between the side wall 12a connected to the flange 11 of the opening and the bottom surface 13a surrounded by the side wall 12a, or between the rising wall 12b connected to the flange 11 and the top plate surface 13b surrounded by the rising wall 12b. In addition, a groove portion 15 is formed, and a groove portion 15 having an outer surface 15a and an inner surface 15b having a slope that is looser than the inclination of the outer surface 15a is formed in the vicinity of all or part of the corner portion 14, and the groove portion. And forming a remaining portion 16 that is outside of 15 ”
The container 10a or the lid 10b can sufficiently perform a restoring function that positively deforms the vicinity of the corner 14 and immediately returns to the original state.
Thus, the resin molded product 10 can be provided with a simple configuration.

 In particular, the resin molded product 10 according to the present invention can deform only the vicinity of each corner 14 when a force is applied thereto, and does not deform the flange 11 of the opening. When the lid is fitted using this, the lid can be stably fitted. Further, a plurality of the resin molded products 10 according to the present invention fitted with such a lid can be stacked without causing cloudiness or deformation.

The resin molded product 10 when the present invention is applied to the lid body 10b is shown. (A) is a plan view, (b) is a front view of the left half along line 1-1 in (a). It is the seen longitudinal cross-sectional view. It is the longitudinal cross-sectional view seen along the 2-2 line in Fig.1 (a) which made the left half the front view. 2 is a plan view of a part of the resin molded product 10 and a longitudinal section of a part of the plan view. FIG. 4 is a partial longitudinal sectional view of the anti-blocking protrusion 19 of FIG. 3 as a center. It is a fragmentary sectional view when a plurality of the resin molded products 10 are stacked. It is the longitudinal cross-sectional view of the main body by which the same resin molded product 10 was applied and made the right half into the front view. It is a top view at the time of applying the resin molded product 10 to the circular thing of planar view. It is the fragmentary sectional view which showed simultaneously the case where the force is not applied to the right and left of the black bidirectional arrow of the resin molded product 10 which concerns on Claim 1, and the case where it is applied. It is the fragmentary sectional view which showed simultaneously the case where the force is not applied to the right and left of the black bidirectional arrow of the resin molded product 10 which concerns on Claim 2, and the case where it is applied. It is the fragmentary sectional view which showed simultaneously the case where the force is not applied to the right and left of the black bidirectional arrow of the resin molded product 10 which concerns on Claim 3, and the case where it is applied. It is an exploded view which shows the technique of patent document 1. FIG.

 The invention according to each claim configured as described above will be described based on the embodiment shown in the drawings. FIG. 1 shows a case where the resin molded product 10 according to the present invention is applied to a lid 10b. Is shown. This resin molded product 10 is obtained by vacuum or pressure molding, that is, sheet molding, of a synthetic resin sheet made of a thermoplastic synthetic resin such as polyethylene terephthalate, polypropylene, polystyrene, or polylactic acid. In this case, as the synthetic resin sheet, a sheet having a thickness of 0.15 mm to 0.8 mm was adopted, and among them, a sheet having a thickness of 0.35 mm to 0.40 mm was optimal. FIG. 6 shows a case where the resin molded product 10 according to the present invention is applied to the main body 10a.

As described above, the resin molded product 10 according to this embodiment is applied to the lid body 10b fitted to a container (not shown), but can also be applied to the container 10a. When this resin molded product 10 is applied to the container 10a, the configuration of each part is just upside down from the case of the lid 10b, and the function or effect of each part is exactly the same as that of the lid 10b. In the drawings showing the embodiment, the reference numeral “a” is “a” is given in parentheses or shown in FIG. 7, and the description of the resin molded product 10 applied to the container 10a is omitted.

Now, as shown in FIG. 1 (a), the lid body 10b, which is a resin molded product 10, has a substantially rectangular flange 11 and a rising wall 12b connected to the flange 11 from the outside of the figure. The top plate surface 13b supported by the rising wall 12b is provided, and the four corners of the top plate surface 13b are corner portions 14. A fitting portion 11a is formed at each corner of the flange 11 as shown in FIGS. 1B, 2 and 4, and a flange of a container (not shown) is formed by these fitting portions 11a. Locking is performed when fitted to the.

In addition, the anti-blocking protrusion 19 is formed in the boundary part of the flange 11 and the raising wall 12b mentioned above, as shown to (a) and FIG. 5 of FIG. As shown in FIG. 5, blocking (a phenomenon in which the lids 10b are fitted into each other and are difficult to take out) is prevented when a plurality of the lids 10b are stacked.

 As shown in FIGS. 1 and 3, each corner 14 has a center line 14 a that is directed to the approximate center of the resin molded article 10 (only the upper right corner 14 is shown in FIG. 1A). Grooves 15 intersecting with each other are formed. As shown in FIGS. 3 and 8, the groove portion 15 is constituted by an outer surface 15 a and an inner surface 15 b connected at the lower end when viewed in cross section, whereby the groove portion 15 is substantially in cross section. It is V-shaped.

In addition, when the said resin molded product 10 is a square shape (planar view square shape), since a corner | angular part deform | transforms easily and becomes cloudy, the "groove part 15" defined in this specification is each "corner part 14". It becomes more effective if it is provided in the vicinity.

 The outer side surface 15a (right side surface as viewed in FIG. 3) constituting each groove portion 15 is steeper than the inner side surface 15b (right side surface as viewed in FIG. 3). When a pressing force is applied to the plate surface 13b, first, the inner side surface 15b is deformed as the top plate surface 13b is lowered.

When the groove 15 is formed in the vicinity of each corner 14, a part of the top plate surface 12 b remains as the remaining portion 16, and thereby the reinforcing rib 17 is formed on the remaining remaining portion 16. The remaining portion 16 itself can be formed to be connected to the upper end of the rising wall 12b in an inclined state. The remaining portion 16 according to the embodiment is inclined or curved as shown in FIGS. 3 and 9.

 As shown in FIGS. 1A and 10, each reinforcing rib 17 is formed in the remaining portion 16 so as to intersect the groove portion 15. The reinforcement of the formed corner | angular part 14 is performed literally.

When a pressing force is applied to the vicinity of the top plate surface 13b and each corner portion 14 of the resin molded product 10 as described above on the right side of the black two-way arrow in FIGS. Although the part 16 and the reinforcing rib 17 are deformed, these deformations do not exceed the elastic deformation range of the synthetic resin because each part is configured as described above.

On the other hand, when the pressing force to the top plate surface 13b and the corner portion 14 disappears, the groove portion 15, the remaining portion 16, and the reinforcing rib 17 were not deformed beyond the elastic deformation range. As shown on the left side of the black double arrow in FIGS.

DESCRIPTION OF SYMBOLS 10 Resin molded product 10a Container 10b Cover body 11 Flange 11a Fitting part 12a Side wall 12b Standing wall 13a Bottom surface 13b Top plate surface 14 Corner part 15 Groove part 15a Outer side face 15b Inner side face 16 Residual part 17 Reinforcement rib 18 Notch part 19 Blocking prevention Protrusion

Claims (3)

A resin molded product that is formed of a synthetic resin and serves as a container or a lid,
A corner is formed between the side wall connected to the flange of the opening and the bottom surface surrounded by the side wall, or between the rising wall connected to the flange and the top plate surface surrounded by the rising wall. In addition, a groove portion having an outer surface, an inner surface having a slope that is gentler than the inclination of the outer surface, and a residual portion that is outside the groove portion are formed in the vicinity of all or part of the corner portion. Resin molded product.  2. The resin molded product according to claim 1, wherein the residual portion is made to continue while being inclined with respect to the side wall or the rising wall.  The resin molded product according to claim 1, wherein a reinforcing rib that intersects the groove is formed on the remaining portion or the outer surface.

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