JP6502448B2 - Dish container - Google Patents

Description

  The present invention relates to a dish-shaped container formed by sheet molding of a synthetic resin sheet.

  Since so-called "sheet-forming" containers are inexpensive and hygienic, a wide variety of containers have been proposed in recent years as packaging for various types of food. However, this type of sheet-formed container is different from injection-molded one, and the material is a synthetic resin “sheet”, so how to secure the rigidity as the container is always It is a problem point.

  As a device for enhancing the rigidity of a sheet molded product, for example, there is a "food container" proposed in Patent Document 1.

Patent No. 3513644 publication, paragraphs 0007 to 0010

The "food container" proposed in the above-mentioned Patent Document 1 is
"A flat, substantially polygonal container which is integrally molded from a synthetic resin foam sheet and has a flange-like edge having a substantially concave-shaped cross section which protrudes outward at the upper end of a side wall continuous to the bottom The side wall portion is inclined outward, and both side wall portions adjacent to each other at each corner of the container are bent and rounded by a curved surface, and the bent continuous portion is rib-shaped gradually larger gradually toward the upper end side At the upper end, the upper end is made continuous with the flanged edge and the inner edge of the flanged edge at each corner is recessed toward the outer edge of the corner. And the recessed portion is substantially tapered toward the outer edge of the corner "
It is considered that “stiffness can be secured” based on a very complicated shape as described in paragraphs “0008” to “0010” of Patent Document 1 above.

  However, it is a well-known fact that a container for forming a sheet of this type can realize a certain degree of rigidity by providing a large number of ribs and forming a complicated shape. Rather, forming a large number of ribs and forming a complex shape is a well-known fact that causes the contents to be difficult to see from the outside, and it is disposable only by packaging contents such as food. Containers that are often carried out are techniques that we want to avoid as much as possible.

  In particular, in the case where the target container is a shallow and flat container, that is, a "dish container", securing of rigidity is extremely difficult because it is close to the shape of a synthetic resin sheet which is a material. Is the actual situation.

  Therefore, the present inventors have made various studies on how to secure rigidity with an extremely simple structure with respect to a "dish-like container" made of a synthetic resin sheet as a result of the present invention. It is completed.

  That is, the object of the present invention is to show the whole of the stored food etc., to be of a simple design, and further to provide a simple dish-like container which can ensure sufficient rigidity as the container. To provide by.

In order to solve the above problems, first, means taken by the invention according to claim 1 will be described with reference to the reference numerals used in the description of the best mode to be described later,
“A side surface 12 continuous with each side 11 a of the polygonal upper opening 11 and continuing at a boundary line 12 a with the corner 11 b of the upper opening 11 as the upper end point 12 b, and a bottom surface 13 whose outer periphery is continuous with the lower edge of the side 12 And a dished container 10 formed by sheet molding of a non-foamed synthetic resin sheet,
A rib-shaped contact leg 14 which is formed on the outer peripheral portion of the bottom surface 13 and is continuous with an equal width and which is recessed outward is formed on the boundary line 12 a portion. A continuous rising rib 15 having the same width is formed, and the rising rib 15 extends in a long shape at the boundary line portion and is continuous with the contact leg portion 14 and is a sheet of the synthetic resin sheet The plate-like container 10 made of a synthetic resin characterized in that the thickness is 0.20 to 1.00 mm.
It is.

  The first premise of the plate-like container 10 according to the present invention is that the upper opening 11 is a polygon, and the upper opening 11 consists of a plurality of sides 11 a. In other words, the dished container 10 according to the present invention assumes only the case where each side 11a is a straight line, and the upper opening 11 does not include a "curve" represented by a circle or an ellipse. .

  The upper opening 11 of the dished container 10 needs to be polygonal because if the upper opening 11 has a curvilinear portion, the force applied to the dished container 10 does not occur in the curvilinear portion. Dispersed in the container 10, and bending or twisting occurs in an unexpected portion of the dish 10. On the other hand, if the upper opening 11 is a polygon, when lifting the plate-like container 10, a person will put a hand on the side 11a which is a straight line, and the lid 20 is put on the plate-like container 10 concerned. In the case, a force will be applied to the corner 11b where each side 11a intersects. In any case, a person can operate naturally because the upper opening 11 is polygonal, so that the plate-like container 10 is not bent, broken or twisted as compared with the container including the curved portion. It is natural to handle it.

  The second premise of the dished container 10 according to the present invention is that the dished container 10 is connected to each side 11a of the upper opening 11 at a boundary line 12a where the corner 11b of the upper opening 11 is the upper end point 12b. A continuous side surface 12 and a bottom surface 13 whose outer periphery is continuous to the lower edge of the side surface 12 are provided. In other words, in the dished container 10, the bottom surface 13 of the plane is continuous with the side surface 12 which is a plane at the peripheral edge, the side surfaces 12 are continuous with each other at the boundary 12a, and the upper end side of each side 12 Is a side 11a, and sheet forming using a synthetic resin sheet can be easily performed.

  Then, the dished container 10 according to the first aspect is formed on the outer peripheral portion of the bottom surface 13 and is continuous at an equal width, and a rib-shaped abutting leg portion 14 concaved outward and the side surface 12 It forms in the boundary line 12a part of the corner 11b, and forms the standing | rising rib 15 continuous in the equivalent width | variety in the contact | abutting leg part 14. As shown in FIG.

  The contact leg 14 formed on the outer peripheral portion of the bottom surface 13 has a rib shape recessed outward (surface side of the desk or shelf) as shown in FIGS. 3 and 6. As shown in FIG. 4 and FIG. In other words, the contact leg portion 14 is a portion where the synthetic resin sheet of the material is doubly overlapped, and moreover, is continuous with an equal width, so that the pipe is harder to bend than the plate. And the rigidity is uniform over the entire area (length) of the abutment leg 14.

  On the other hand, the rising rib 15 is also formed on the boundary line 12 a of the corner 11 b in each side surface 12 and continues to the contact leg 14 with the same width as that of the contact leg 14. Similarly, the rigidity is high and the rigidity is uniform over the entire length (length) of each rising rib 15.

  As described above, since the contact legs 14 and the rising ribs 15 have high rigidity, when a force is applied to the plate-like container 10, concentration is achieved via the side surfaces 12 and the bottom surface 13 which are surfaces. Even if hung, the dish-like container 10 will hardly deform.

  In particular, since the contact leg 14 as a whole is in contact with the surface of the desk or shelf, when the contents are stored in the plate-like container 10 and placed on the desk or shelf, the plate-like container 10 The force such as gravity applied to the plate is dispersed to the desk or the shelf side, and the dished container 10 is not deformed. On the other hand, with respect to each rising rib 15 having high rigidity, it serves as a “support” when the lid 20 shown by the phantom line in FIGS. 3 and 5 is fitted to the plate-like container 10. Therefore, each rising rib 15 ensures that the lid 20 can be fitted without causing the dish 10 to deform.

  More importantly, in the dished container 10 according to the present invention, no unevenness or rib is formed at all on the side surface 12 and the bottom surface 13 thereof, and only the outer peripheral portion of the bottom surface 13 is thin. A highly rigid abutment leg 14 and each rising rib 15 continuous with the same width are formed. Thus, the plate-like container 10 has a simple design as a whole.

  Therefore, the plate-like container 10 according to the first aspect is of a "dish-like shape" and can of course show the whole stored food etc., as a matter of course, has a simple design, and as a container Sufficient rigidity is also secured.

The means adopted by the invention according to claim 3 relates to the plate-like container 10 made of synthetic resin according to the above-mentioned claim 1,
“The lower end of each rising rib 15 should be a support portion having the same lower surface as the contact leg 14”
It is.

In the dished container 10 according to the first aspect, the contact leg portion 14 abuts on the surface of the desk or shelf as a whole, so that the force such as gravity applied to the dished container 10 can be used for the desk or shelf When the lower end of each rising rib 15 is a support portion having the same lower surface as the contact leg portion 14 as in the dished container 10 according to the third aspect , The “posts” by the rising ribs 15 play a role of a “sticky rod” to disperse the force such as gravity applied to the dish 10 on the desk or shelf side, and the dish 10 as a whole is not buckled. ing.

Therefore, the plate-like container 10 according to the third aspect exhibits the same function as that of the first aspect, and further secures the rigidity as a container when placed on a desk or a shelf. -ing

Further, in order to solve the above-mentioned problems, means adopted by the invention according to claim 4 relates to the plate-like container 10 made of synthetic resin according to the above-mentioned claim 1,
“The base portion 16 is formed in the vicinity of the lower end point 12c of the boundary line 12a and surrounded by the end of each abutting leg 14 adjacent thereto and having the same lower surface as these abutting legs 14 "
It is.

That is, in the dish-like container 10 according to the fourth aspect, as shown in (b) and 4 of Figure 1, in the vicinity of the lower end point 12c of the boundary line 12a, having an equivalent Se'ashi portion 14 and the same lower surface " The pedestal portion 16 to be the support portion is positively formed, and a flat portion having, for example, a substantially triangular shape is formed integrally with the end portion of each adjacent contact leg portion 14.

  For example, as shown in FIG. 7, each pedestal portion 16 comes into contact with the surface of the desk or shelf with a certain area, so that the force such as gravity applied to the dish 10 is The plate-like container 10 as a whole is not buckled as it is dispersed on the desk or shelf side together with the end portions of the contact legs 14 surrounding the portion 16.

Therefore, the plate-like container 10 according to the fourth aspect performs the same function as that of the first aspect, and can disperse the force when placed on a desk or a shelf through the pedestal portions 16. It is a thing.

The means adopted by the present invention relates to the above-mentioned dish-shaped container 10 made of synthetic resin,
"The lower end point 12c of the boundary line 12a is at the same position as the lower surface of each abutting leg portion 14, and a part of each abutting leg portion 14 located in the vicinity of the lower end point 12c has an arc shape. The lower end portions of the contact legs 14 and the rising ribs 15 are smoothly continued in the vicinity of the point 12 c.
It is.

  As in the embodiment shown in FIG. 1, when each abutting leg 14 located in the vicinity of the lower end point 12c is made linear, an intersection with each linear rising rib 15 is made, and stress is generated at this intersection. It becomes easy to concentrate. If there is a portion where stress concentrates, deformation tends to occur in this portion, but in the dish container 10 according to the present invention, as shown in FIG. 4, each abutment leg located near the lower end point 12c By forming a part of the portion 14 in an arc shape, the formation of a stress concentration portion is prevented.

  Although it is a part that makes each abutment leg 14 arc-shaped, this part is a part located near the lower end point 12c, for example, the part shown in FIG. The remaining portion excluding the left and right parts of the contact leg 14 may be straight.

  Further, in the dished container 10 according to the present invention, the lower end point 12c of each boundary line 12a is located at the same position as the lower surface of each abutting leg portion 14, but this corresponds to each abutting leg in the vicinity of the lower end point 12c. This is for the lower ends of the portion 14 and the rising rib 15 to be smoothly continued. As described above, when the rising ribs 15 and the abutting legs 14 are smoothly continued, the generation of the above-described stress concentration portion is suppressed also by this.

  Therefore, the dish-like container 10 according to the present invention exerts the same function as that of the above-mentioned dish-like container 10 made of synthetic resin, and can suppress the occurrence of stress concentration parts, further securing the rigidity as the container. It is something that can be done.

Furthermore, in order to solve the above problems, means taken by the invention according to claim 5 relates to the synthetic resin dish-like container 10 according to any one of the above-mentioned claims 1 to 4 ;
“The cross-sectional shape of the side surface 12 is an arc that is convex outward at the central portion, and is smoothly continuous so as to be a straight line at the boundary line 12 a.”
It is.

In the dished container 10 according to the fifth aspect, as shown in FIG. 6, the cross-sectional shape of the side surface 12 is a convex arc shape convex outward at the central portion and is smooth so as to be straight at the boundary 12a. It is made to be continuous. By making the cross-sectional shape of the central portion of each side surface 12 into an outwardly convex arc shape, the rigidity of the side surface 12 is enhanced. Of course, the reason why the line is smoothly continued so as to be straight at each boundary 12 a of the side surface 12 is to make it smoothly continue with the rising rib 15 located here.

Therefore, the dish-like container 10 according to the fifth aspect exhibits the same function as that of the first to fourth aspects, and further, the rigidity as the container at the side surface 12 can be further secured. .

The means adopted by the invention according to claim 6 relates to the plate-like container 10 made of a synthetic resin according to any one of the above-mentioned claims 1 to 5 ,
“The angle θ between the lower surface and the upper surface of the side surface 12 and the extension surface of the bottom surface 13 is 10 ° to 45 °”
It is.

The angle θ in the dished container 10 according to claim 6 can be defined as shown in FIGS. 3 and 6, but the necessity for the angle θ to be 10 ° to 45 ° is as follows.

  When this angle θ is smaller than 10 °, the rising ribs 15 almost lie down, and the force received from the upper end of each rising rib 15 is applied as in the case of fitting the lid 20, for example. It is because it disperse | distributes or transmits to the side 12 side before transmitting to the leg part 14, and the side 12 is often deformed. On the other hand, if the angle θ is larger than 45 °, the dish-like container 10 will not be substantially “dish-like” and the intended container can not be obtained. Preferably, this angle θ is between 20 ° and 30 °.

Therefore, the dish-like container 10 according to the sixth aspect exhibits functions similar to those of the first to fifth aspects, and can also make the goods or the contents largely visible.

Then, in order to annihilate the problem, means of adopting the invention according to claim 7, for dish-shaped container 10 made of a synthetic resin according to any one of claims 1 to 6,
“A flat portion 17 for positioning the lid 20 covering the upper opening 11 of the plate-like container 10 is formed at the upper end of the rising rib 15”
It is.

Dish-shaped container 10 according to the claim 7, as shown in FIGS. 4 and 7 is obtained by forming a flat portion 17 at the upper end of each rising ribs 15, the flat portion 17, the dish-shaped container 10 The lid 20 is used to fit the lid 20 and is used to position the lid 20.

  In general, when the lid 20 can be fitted to the dished container 10, the lid 20 is formed with a portion for stopping or locking the lid 20 at an appropriate position relative to the dished container 10. If the portion at the side of the lid 20 abuts on the upper end of the high rigidity rising rib 15, accurate positioning is achieved.

Therefore, the plate-like container 10 according to the seventh aspect exhibits the same function as that of the first to sixth aspects, and a flat portion as an important support or positioning member when the lid 20 is fitted. By having 17, the lid 20 can be stably fitted.

As described above, the present invention is
“A side surface 12 continuous with each side 11 a of the polygonal upper opening 11 and continuing at a boundary line 12 a with the corner 11 b of the upper opening 11 as the upper end point 12 b, and a bottom surface 13 whose outer periphery is continuous with the lower edge of the side 12 And a dished container 10 formed by sheet molding of a non-foamed synthetic resin sheet,
A rib-shaped contact leg 14 which is formed on the outer peripheral portion of the bottom surface 13 and is continuous with an equal width and which is recessed outward is formed on the boundary line 12 a portion. A continuous rising rib 15 is formed with the same width, and the rising rib 15 extends in a long shape at the boundary line portion and is continuous with the contact leg portion 14, and the synthetic resin sheet Sheet thickness should be 0.20 to 1.00 mm "
It is possible to show the whole of the stored food etc. by this, to be a thing of a simple design, and also to ensure sufficient rigidity as a container. The dish 10 can be provided by a simple construction.

The dish-shaped container 10 which concerns on 1st Example of this invention is shown, (a) is a top view corresponding to the claim of Claim 1, (b) is a top view at the time of having the base part 16. FIG. It is a front view which shows the plate-shaped container 10 which concerns on the 1st Example. It is the longitudinal cross-sectional view seen along line 1-1 in FIG. 1 which shows the plate-shaped container 10 which concerns on the 1st Example. It is a top view which shows the plate-shaped container 10 which concerns on 2nd Example of this invention. It is a front view which shows the plate-shaped container 10 which concerns on the 2nd Example. It is the longitudinal cross-sectional view seen along line 2-2 in FIG. 4 which shows the dish-shaped container 10 which concerns on the 2nd Example. It is the longitudinal cross-sectional view seen along line 4-4 in FIG. 4 which shows the plate-like container 10 of the same. It is the elements on larger scale sectional view seen along line 5-5 in FIG. FIG. 2 is a bottom view of the plate-like container 10; It is the longitudinal cross-sectional view seen along line 6-6 in FIG. 5 which shows the plate-like container 10 of the same.

  Next, although the invention concerning each claim constituted as mentioned above is explained about plate-like container 10 which is an embodiment shown in a drawing, plate-like container 10 of this embodiment is shown in FIGS. There are the first embodiment shown in FIG. 1 and the second embodiment shown in the other drawings, and therefore, these will be separately described below.

  Moreover, any dished container 10 is formed by a sheet forming method using a synthetic resin sheet as a material. Although A-PET was adopted as a synthetic resin sheet in this case, a non-foamed sheet of polypropylene, polystyrene or polylactic acid can also be adopted. Moreover, the sheet thickness of the synthetic resin sheet was 0.20 to 1.00 mm.

About the contact | abutting leg part 14 mentioned later by employ | adopting the above synthetic resin sheet,
Width: about 1 mm
Depth: about 3 mm
In the case of a general 150 mm square container, it is possible to design the effective thinness and the depth to increase the rigidity.

  The dished container 10 according to the present invention may be used alone, but as indicated by the phantom lines in FIGS. 3 and 5, a lid covering the upper opening 11 of the dished container 10 It may be used by fitting 20. As the lid 20, one that can be fitted outside the inside of the upper opening 11 of the plate-like container 10 or one that can be fitted inside is adopted, but the fitting place is performed around the corner 11b of the top opening 11. Are common.

(First embodiment)
1 to 3 show a plate-like container 10 according to a first embodiment of the present invention, but the plate-like container 10 shown in (a) of FIG. 1 corresponds to the contents of claim 1 The upper opening 11 is rectangular. And the dish-like container 10 which concerns on this embodiment continues in each side 11a of the polygon upper opening 11 as shown also in (a) of FIG. And a bottom surface 13 whose outer periphery is continuous with the lower edge of the side surface 12.

  The dish-like container 10 according to the present invention is "dish-like" as the name suggests, so the upper opening 11 of the polygon is shown in FIG. 1 (the first embodiment) and FIG. 4 (the second embodiment described later). As shown in), it is widely spread from the outer periphery of the bottom surface 13, and is a group of a plurality of sides 11a. Each side 11a is linear, and the intersection of these sides 11a is a corner 11b, and this corner 11b coincides with the upper end point 12b forming the boundary 12a of the side surface 12.

  The side surface 12 is divided into a plurality of boundaries 12a extending from the corner 11b of the upper opening 11 as shown in FIG. 1, and each boundary 12a is on the top as shown in FIG. It is defined by the end point 12b and the lower end point 12c. The boundary line 12a coincides with the rising rib 15 described later, and the angle between the lower end and the upper end of the side surface 12 and the extension surface of the bottom surface 13 is as shown in FIG. , Θ.

  The bottom surface 13 may be similar to the upper opening 11 as shown in FIG. 1, but may be different in shape from the upper opening 11 as shown in FIG. In any case, there is nothing to be formed on the bottom surface 13 other than the contact legs 14 on the outer periphery, and it is completely flat.

  As shown in FIGS. 1 to 3, the contact leg portion 14 is formed on the outer peripheral portion of the bottom surface 13 and has a rib shape which is continuous with an equal width and is recessed outward. When the abutment leg 14 is concaved outward, the abutment leg 14 has a convex shape and protrudes outward when the plate-like container 10 is viewed from the bottom side. Means That is, when the plate-like container 10 is placed on a desk or a shelf, the abutment leg 14 abuts on the entire convex tip thereof.

  As shown in FIGS. 1 and 2, the rising rib 15 is formed on the border line 12a of the corner 11b on the side surface 12, and has a width equal to that of the abutting leg 14, which is about 3 mm in this embodiment. It is continuous in width. In the rising rib 15 of the embodiment, the width of the upper end portion is 0 mm and disappears, but the entire rising rib 15 may have a depth of 3 mm.

  In the dished container 10 according to the first embodiment, as shown in (b) of FIG. 1, each abutment leg 14 adjacent to the lower end point 12 c of the boundary line 12 a comes close to it. The pedestal portion 16 having the same lower surface as the contact legs 14 is formed by being surrounded by the end portion of the lower end portion, and for example, a substantially triangular flat surface is integrally formed.

Second Embodiment
4 to 10 show a plate-like container 10 according to a second embodiment of the present invention, but the upper opening 11 of the plate-like container 10 is a square. Further, in the dish-like container 10 of the second embodiment, the members described in the first embodiment are often adopted as they are in many cases. The same reference numerals are given to FIGS. 4 to 10 and the description is omitted.

  The greatest feature of the plate-like container 10 according to the second embodiment is, as shown in FIG. 4, that the lower end point 12c of the boundary line 12a is in the same position as the lower surface of each abutment leg 14 and the lower end point 12c. By making a part of each contact leg 14 located in the vicinity of a circular arc, each lower end portion of each contact leg 14 and the rising rib 15 is smoothly continued in the vicinity of the lower end point 12c. .

  In this manner, a part of each contact leg 14 located near the lower end point 12c is formed into an arc shape, and the lower ends of each contact leg 14 and rising rib 15 are smoothly continued in the vicinity of the lower end point 12c. Then, the plate-like container 10 can be given a smooth or soft impression. Furthermore, the cross-sectional shape of the side surface 12 can be easily made to be smoothly continuous so as to be an outwardly convex arc shape at the central portion and to be straight at the boundary line 12a. Can also be good.

  In the dished container 10 according to the second embodiment, as shown in FIGS. 4, 7 and 8, a lid covering the upper opening 11 of the dished container 10 at the upper end of the rising rib 15. A plane portion 17 for positioning 20 is formed.

  The flat portion 17 is an important support or positioning member when the lid 20 is fitted, and the lid 20 is stably fitted.

DESCRIPTION OF REFERENCE NUMERALS 10 dished container 11 upper opening 11 a side 11 b corner 12 side surface 12 a boundary line 12 b upper end point 12 c lower end point 13 bottom surface 14 contact leg 15 rising rib 16 pedestal portion 17 flat portion 20 lid

Claims (7)

A non-foamed synthetic resin having a side surface continuous with each side of the upper opening of the polygon and continuing at a boundary line having the upper opening corner as an upper end point, and a bottom surface having a continuous outer periphery at the lower edge of the side surface In a dish-like container formed by sheet forming of a sheet,
A rib-shaped abutment leg which is formed on an outer peripheral portion of the bottom surface and is continuous with an equal width and is recessed outward, and is formed in the boundary line portion, and is equivalent to the abutment leg Form a continuous rising rib with a width of
The rising rib extends in a long shape at the boundary line portion and is continuous with the contact leg portion,
The sheet thickness of the synthetic resin sheet is 0.20 to 1.00 mm, and the plate-like container made of synthetic resin is characterized.   The plate-shaped container made of synthetic resin according to claim 1, wherein only the contact leg and the rising rib are provided on the bottom surface and the side surface, and the other asperities and ribs are not provided. . The synthetic resin dish container according to claim 1 or 2 , wherein the lower end of each rising rib is a supporting portion having the same lower surface as the contact leg portion. In the vicinity of the lower end point of the boundary line, a pedestal portion having the same lower surface as the contact legs is formed so as to be surrounded by the ends of the contact legs adjacent thereto. The plate-shaped container made of a synthetic resin according to any one of claims 1 to 3 . Claim 1 the cross-sectional shape of the side surface, the central portion of each side of the upper opening is a convex arc-shaped outwardly, characterized in that smoothly made continuous so that a straight line in the boundary line plastic dish-shaped container according to any one of 1 to claim 4. The angle θ of the line connecting the lower end and the upper end of the side surface to the extension surface of the bottom surface is 10 ° to 45 °, the composition according to any one of claims 1 to 5 Resin dish container. The synthetic resin according to any one of claims 1 to 6 , wherein a flat portion for positioning a lid covering the upper opening of the dish-like container is formed at an upper end of the rising rib. Plate-like container.

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