JP5941834B2 - container - Google Patents

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JP5941834B2
JP5941834B2 JP2012265035A JP2012265035A JP5941834B2 JP 5941834 B2 JP5941834 B2 JP 5941834B2 JP 2012265035 A JP2012265035 A JP 2012265035A JP 2012265035 A JP2012265035 A JP 2012265035A JP 5941834 B2 JP5941834 B2 JP 5941834B2
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rib
bottom wall
container
circumferential direction
convex
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JP2014108820A (en
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卓 西岡
卓 西岡
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Sekisui Kasei Co Ltd
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Sekisui Kasei Co Ltd
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Description

本発明は、熱可塑性樹脂シートが熱成形されてなる容器（例えば、豆腐用容器）に関する。   The present invention relates to a container (for example, a container for tofu) obtained by thermoforming a thermoplastic resin sheet.

従来、この種の容器としては、熱可塑性樹脂シートが熱成形されてなり、上面が開口する収容凹部を備える容器であって、被収容物（例えば、豆腐と水）を収容凹部に収容して開口を樹脂フィルムで閉塞することにより密封される容器が知られている（例えば、特許文献１）。かかる容器の収容凹部は、被収容物を載置するための表面を有する底壁と、該底壁の外周縁から立設された枠状の側壁とで構成されている。   Conventionally, as this type of container, a thermoplastic resin sheet is thermoformed, and the container is provided with an accommodation recess having an upper surface that is open, and contains objects (for example, tofu and water) in the accommodation recess. A container that is sealed by closing the opening with a resin film is known (for example, Patent Document 1). The housing recess of the container is composed of a bottom wall having a surface for placing an object to be accommodated, and a frame-like side wall erected from the outer peripheral edge of the bottom wall.

このような容器には、材料コストなどの関係から、従来、薄肉化が求められており、薄肉でありながら必要な強度を発揮させるために底壁や側壁に容器内側に突出する断面逆Ｕ字状のリブを形成させたものが採用されている。   Such containers have conventionally been required to be thin due to the material cost, etc., and in order to exert the necessary strength while being thin, the cross-section inverted U-shape that protrudes to the inside of the container on the bottom wall and side wall What formed the shape-like rib is employ | adopted.

例えば、底壁表面の中央部領域から外周縁側に亘って凸設される長尺な第一リブであって、前記底壁の周方向に離間して複数配置される第一リブと、底壁表面の中央部領域と外周縁との間の位置で、全ての第一リブの長手方向途中位置同士を連結するように前記周方向に沿って環状（枠状）に凸設される環状リブとを備えてなる容器が広く用いられている。   For example, a long first rib that protrudes from the center region of the bottom wall surface to the outer peripheral edge side, and a plurality of first ribs that are spaced apart in the circumferential direction of the bottom wall, and the bottom wall An annular rib projecting in an annular shape (frame shape) along the circumferential direction so as to connect intermediate positions in the longitudinal direction of all the first ribs at a position between the central region of the surface and the outer peripheral edge; The container provided with is widely used.

ここで、第一リブは、被収容物の重力など底壁にかかる外力に対して、底壁を第一リブの長手方向に沿って表面から裏面側又はその逆向きに撓み難くするように補強するものである。しかし、この第一リブだけでは、底壁が第一リブの長手方向と交わる周方向に沿って撓み易い。そこで、かかる容器では、第一リブの長手方向と交わる周方向に沿って環状リブを設けることで、底壁を周方向に沿って表面から裏面側又はその逆向きに撓み難くするように補強している。   Here, the first rib is reinforced so as to make it difficult to bend the bottom wall from the front surface to the back surface side or vice versa along the longitudinal direction of the first rib against the external force applied to the bottom wall such as the gravity of the object. To do. However, with only the first rib, the bottom wall is easily bent along the circumferential direction intersecting the longitudinal direction of the first rib. Therefore, in such a container, by providing an annular rib along the circumferential direction intersecting the longitudinal direction of the first rib, the bottom wall is reinforced so that it is difficult to bend along the circumferential direction from the front surface to the back surface side or vice versa. ing.

ところが、上記従来の容器にあっては、環状リブを設けたことで、底壁が環状リブの径方向（即ち第一リブの長手方向）に沿って撓み易くなってしまい、被収容物の重力などの外力が底壁にかかった際に底壁が変形し易い。このように容器の強度の点で、改善の余地があった。   However, in the above-described conventional container, by providing the annular rib, the bottom wall is easily bent along the radial direction of the annular rib (that is, the longitudinal direction of the first rib), and the gravitational force of the object to be accommodated. When an external force such as is applied to the bottom wall, the bottom wall is easily deformed. Thus, there was room for improvement in terms of the strength of the container.

特開２００７−１２５００８号公報JP 2007-125008 A

そこで、本発明は、上記問題に鑑みてなされたもので、被収容物の重力など底壁にかかる外力に対して変形し難い容器を提供することを課題とする。   Then, this invention is made | formed in view of the said problem, and makes it a subject to provide a container which cannot change easily with respect to the external force concerning a bottom wall, such as the gravity of a to-be-contained object.

本発明の容器は、熱可塑性樹脂シートが熱成形された容器であって、被収容物を載置するための表面及び該表面の反対側の面である裏面を有する底壁と、該底壁の外周縁から立設された枠状の側壁と、前記底壁の何れか一方の面の中央部領域から外周縁側に亘って凸設される長尺な第一リブであって、前記底壁の周方向に離間して複数配置される第一リブと、該第一リブが設けられる前記一方の面の中央部領域と外周縁との間の位置で、中央部領域を囲うように前記周方向に沿って凸設される第二リブとを備え、前記第二リブは、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブに交わっていることを特徴とする。 The container of the present invention is a container thermoplastic resin sheet is thermoformed, and a bottom wall having a back surface which is a surface opposite to the surface and the surface for placing the contained object, the bottom wall A frame-like side wall erected from the outer peripheral edge of the base plate, and a long first rib projecting from the central region of any one surface of the bottom wall to the outer peripheral edge side, the bottom wall A plurality of first ribs spaced apart from each other in the circumferential direction and a position between the central region and the outer peripheral edge of the one surface on which the first rib is provided so as to surround the central region. A second rib projecting along the direction, and each of the second ribs includes a plurality of convex projections that are long in the circumferential direction and spaced apart from each other in the circumferential direction. Crosses the first rib.

かかる構成からなる容器によれば、第一リブと第二リブとを底壁の同じ面に備え、第二リブは、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブに交わっているため、第一リブによって、底壁を第一リブの長手方向に沿って表面から裏面側又はその逆向きに撓み難くするように補強できると共に、第二リブによって、底壁を第一リブの長手方向と交わる周方向に沿って表面から裏面側又はその逆向きに撓み難くするように補強できるので、被収容物の重力など底壁にかかる外力に対して容器を変形し難くすることができる。   According to the container having such a configuration, the first rib and the second rib are provided on the same surface of the bottom wall, and the second rib has a convex portion that is long in the circumferential direction and spaced apart in the circumferential direction. Since the plurality of protrusions are arranged and each convex portion intersects the first rib, the first rib makes it difficult for the bottom wall to bend from the front surface to the back surface side or vice versa along the longitudinal direction of the first rib. In addition, the second rib can reinforce the bottom wall so that it is difficult to bend along the circumferential direction intersecting the longitudinal direction of the first rib from the front surface to the back surface side or vice versa. The container can be made difficult to be deformed by an external force applied to the bottom wall.

また、本発明の容器では、各凸部は、少なくとも２つの第一リブの長手方向途中位置同士を周方向に連結するように設けられており、各凸部の周方向の長さは、凸部同士の周方向の間隔よりも長くなるように構成することも可能である。   In the container of the present invention, each convex portion is provided so as to connect the midway positions in the longitudinal direction of at least two first ribs in the circumferential direction, and the circumferential length of each convex portion is convex. It can also be configured to be longer than the interval in the circumferential direction between the parts.

かかる構成からなる容器によれば、第二リブによって、底壁を第一リブの長手方向と交わる周方向に沿って表面から裏面側又はその逆向きに極めて撓み難くするように補強できるので、被収容物の重力など底壁にかかる外力に対して容器を変形し難くすることができる。   According to the container having such a configuration, the second rib can reinforce the bottom wall so that it is very difficult to bend from the front surface to the back surface side or vice versa along the circumferential direction intersecting the longitudinal direction of the first rib. The container can be made difficult to be deformed by an external force applied to the bottom wall such as the gravity of the contents.

本発明の容器では、第一リブと第二リブとを底壁の同じ面に備え、第二リブは、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブに交わっているため、第一リブによって、底壁を第一リブの長手方向に沿って表面から裏面側又はその逆向きに撓み難くするように補強できると共に、第二リブによって、底壁を第一リブの長手方向と交わる周方向に沿って表面から裏面側又はその逆向きに撓み難くするように補強できるので、被収容物の重力など底壁にかかる外力に対して容器を変形し難くすることができる。   In the container of the present invention, the first rib and the second rib are provided on the same surface of the bottom wall, and the second rib has a plurality of convex protrusions that are long in the circumferential direction and spaced apart in the circumferential direction. Since each convex part intersects the first rib, the bottom wall is reinforced by the first rib so that it is difficult to bend along the longitudinal direction of the first rib from the front surface to the back surface side or vice versa. In addition, the second rib can reinforce the bottom wall so that it is difficult to bend along the circumferential direction intersecting the longitudinal direction of the first rib from the front surface to the back surface side or vice versa. It is possible to make it difficult for the container to be deformed by an external force applied to the container.

本実施形態に係る容器の斜視図を示す。The perspective view of the container concerning this embodiment is shown. 同容器の平面図を示す。The top view of the container is shown. 同容器の底面図を示す。The bottom view of the container is shown. 同容器の一側面図を示す。One side view of the container is shown.

以下、本発明に係る容器の一実施形態について、豆腐用容器を例にして図１ないし図４を参照しつつ説明する。   Hereinafter, an embodiment of a container according to the present invention will be described with reference to FIGS. 1 to 4 by taking a tofu container as an example.

本実施形態の容器１は、熱可塑性樹脂シートに真空成形や圧空成形といった熱成形が施されて立体的な形状が付与されたものである。具体的には、容器１は、上部に矩形開口を有する収容凹部１０を有し、該収容凹部１０が、被収容物として水とともに豆腐を収容させた状態で樹脂フィルムによって密封されるものである。   The container 1 of the present embodiment is obtained by applying a three-dimensional shape to a thermoplastic resin sheet by thermoforming such as vacuum forming or pressure forming. Specifically, the container 1 has an accommodation recess 10 having a rectangular opening at the top, and the accommodation recess 10 is sealed with a resin film in a state where tofu is accommodated together with water as an object to be accommodated. .

本実施形態の容器１は、図１，２に示すように、前記豆腐の収容スペースを構成している収容凹部１０と、該収容凹部１０の開口縁１０ａから外向きに略水平に延びるフランジ部２０とを有している。   As shown in FIGS. 1 and 2, the container 1 of the present embodiment includes an accommodation recess 10 that constitutes the tofu accommodation space, and a flange portion that extends substantially horizontally outward from the opening edge 10 a of the accommodation recess 10. 20.

収容凹部１０は、上面開口の凹形状をなしており、豆腐の平面視における輪郭形状よりも一回り大きな平面視矩形の底壁１１と、該底壁１１の外周縁から僅かに外向き傾斜した状態で立ち上がる矩形枠状の側壁１２とを有している。   The accommodating recess 10 has a concave shape with an opening on the top surface, and is slightly outwardly inclined from the bottom wall 11 having a rectangular shape in plan view that is slightly larger than the contour shape in plan view of tofu and the outer peripheral edge of the bottom wall 11. It has a rectangular frame-shaped side wall 12 rising in the state.

底壁１１は、被収容物（豆腐と水）を載置するための表面１１Ｕ及び該表面１１Ｕの反対側の面である裏面１１Ｌを有する。この底壁１１の表面１１Ｕには、図２に示すように、中央部領域（中央部とその近傍を含む領域）から外周縁側に亘って長尺な第一リブ１３が複数凸設されており、中央部領域と外周縁との間の位置で、中央部領域を囲うように底壁１１の周方向に沿って第二リブ１４が凸設されている。尚、容器１は、熱可塑性樹脂シートが熱成形されてなるため、底壁１１の表面側における凸設は、裏面側における凹設を意味しており、即ち表面１１Ｕと裏面１１Ｌとは、凹設と凸設とに関して互いに逆をなす面である（図２，３参照）。   The bottom wall 11 has a front surface 11U on which the objects to be stored (tofu and water) are placed, and a back surface 11L that is a surface opposite to the front surface 11U. On the surface 11U of the bottom wall 11, as shown in FIG. 2, a plurality of long first ribs 13 are provided so as to extend from the central region (region including the central portion and its vicinity) to the outer peripheral edge. The second rib 14 is provided so as to protrude along the circumferential direction of the bottom wall 11 so as to surround the central region at a position between the central region and the outer peripheral edge. In addition, since the container 1 is formed by thermoforming a thermoplastic resin sheet, the protrusion on the front surface side of the bottom wall 11 means the recess on the back surface side, that is, the front surface 11U and the back surface 11L are concave. It is a surface which makes mutually opposite about installation and convex arrangement (refer to Drawings 2 and 3).

複数の第一リブ１３は、中央部領域から矩形の外周縁の各辺に亘って設けられている。各第一リブ１３は、平面視で直線状をなし、断面逆Ｕ字形状で表面１１Ｕ側に凸状をなす。各第一リブ１３は、表面１１Ｕ側においては凸入して凸形状をなし、裏面１１Ｌ側においては凹入して凹形状をなしている。また、各第一リブ１３は、長手方向と交差する周方向（又は短手方向）に互いに所定間隔をあけて（本実施形態では、等間隔で）離間するように配置されている。尚、第一リブ１３同士が離間する領域は、溝になっている。つまり、この溝は、表面１１Ｕ側においては凹入して凹形状をなし、裏面１１Ｌ側においては凸入して凸形状をなしている。   The plurality of first ribs 13 are provided from the central region to each side of the rectangular outer peripheral edge. Each of the first ribs 13 has a linear shape in a plan view, and has a convex U shape on the surface 11U side in an inverted U-shaped cross section. Each of the first ribs 13 protrudes into a convex shape on the front surface 11U side and is recessed into a concave shape on the back surface 11L side. The first ribs 13 are arranged so as to be spaced apart from each other at a predetermined interval (in the present embodiment, at equal intervals) in a circumferential direction (or a short direction) intersecting the longitudinal direction. A region where the first ribs 13 are separated from each other is a groove. That is, the groove is recessed to form a concave shape on the front surface 11U side, and is convex to form a convex shape on the back surface 11L side.

第二リブ１４は、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブ１３（第一リブ１３の長手方向途中位置）に交わっている。また、各凸部は、少なくとも２つの第一リブ１３の長手方向途中位置同士を周方向に連結するように設けられており、各凸部の周方向の長さは、凸部同士の周方向の間隔よりも長くなるように構成されている。かかる第二リブ１４は、全て又は一部の第一リブ１３の長手方向途中位置に交わるように構成されることができ、本実施形態の第二リブ１４は、全ての第一リブ１３の長手方向途中位置に交わっている（図２参照）。   The second rib 14 is formed by arranging a plurality of convex protrusions that are long in the circumferential direction so as to be spaced apart in the circumferential direction, and each convex part is the first rib 13 (in the longitudinal direction of the first rib 13). Position). Moreover, each convex part is provided so that the longitudinal direction middle positions of the at least 2 1st rib 13 may be connected to the circumferential direction, and the circumferential direction length of each convex part is the circumferential direction of convex parts. It is comprised so that it may become longer than this space | interval. Such second ribs 14 can be configured to cross all or part of the first ribs 13 in the longitudinal direction, and the second ribs 14 of the present embodiment can be configured such that the lengths of all the first ribs 13 are the same. Crosses in the middle of the direction (see FIG. 2).

本実施形態の各凸部は、矩形の外周縁よりも中央部側寄りの位置で、外周縁（又は周方向）に沿って互いに離間して配置されている。詳細には、各凸部は、外周縁の形状よりも小さい矩形における４つの隅部と４つの辺中央部とに各々設けられており、各凸部は、互いに周方向に離間している。前記４つの隅部に対応して設けられている凸部１４ａは、平面視で略Ｌ形状をなしており、１０個の第一リブ１３の長手方向途中位置同士を周方向に連結するように設けられている（図２参照）。また、前記４つの辺中央部に対応して設けられている凸部１４ｂは、平面視で直線状をなしており、５つの第一リブ１３の長手方向途中位置同士を周方向に連結するように設けられている（図２参照）。また、凸部同士の離間幅（距離）は、第一リブ１３同士の周方向の離間幅（又は２つの第一リブ間の溝幅）と同一又は略同一であり、各凸部の周方向の長さに比べて短い。また、各凸部は、表面１１Ｕ側においては凸入して凸形状をなし、裏面１１Ｌ側においては凹入して凹形状をなしている。この各凸部の表面１１Ｕ側に凸入する高さは、第一リブ１３の表面１１Ｕ側に凸入する高さよりも高くなっている。   Each convex part of this embodiment is spaced apart from each other along the outer peripheral edge (or circumferential direction) at a position closer to the center side than the rectangular outer peripheral edge. Specifically, each convex portion is provided at each of four corners and four side center portions of a rectangle smaller than the shape of the outer peripheral edge, and the respective convex portions are spaced apart from each other in the circumferential direction. The convex portions 14a provided corresponding to the four corner portions have a substantially L shape in plan view, and connect the midway positions in the longitudinal direction of the ten first ribs 13 in the circumferential direction. Provided (see FIG. 2). Moreover, the convex part 14b provided corresponding to the said 4 side center part has comprised the linear form by planar view, and connects the longitudinal direction middle positions of the five 1st ribs 13 to the circumferential direction. (See FIG. 2). Further, the spacing width (distance) between the convex portions is the same as or substantially the same as the circumferential spacing width between the first ribs 13 (or the groove width between the two first ribs), and the circumferential direction of each convex portion. Short compared to the length of. Further, each convex portion is convex to form a convex shape on the front surface 11U side, and is concave to form a concave shape on the rear surface 11L side. The height of each convex portion that protrudes into the surface 11U side is higher than the height that protrudes into the surface 11U side of the first rib 13.

かかる底壁１１の第一リブ１３は、外周縁を超えて側壁１２に延在している。この側壁１２における第一リブ１３は、開口縁１０ａよりも内側に向けて突出した状態で、側壁１２の高さ方向に沿って延在しており、周方向に所定の間隔（等間隔）を設けて複数配置されている（図１，４参照）。   The first rib 13 of the bottom wall 11 extends to the side wall 12 beyond the outer peripheral edge. The first rib 13 on the side wall 12 extends along the height direction of the side wall 12 in a state of projecting inward from the opening edge 10a, and has a predetermined interval (equal interval) in the circumferential direction. A plurality of them are provided (see FIGS. 1 and 4).

上記構成の容器１では、収容凹部１０に水とともに豆腐を収容する。収容後、フランジ部２０の上面側に沿って収容凹部１０を包囲するように前記樹脂フィルムを接着させて、収容凹部１０の上面開口を閉塞することで、豆腐を密封している。   In the container 1 having the above configuration, the tofu is accommodated together with water in the accommodating recess 10. After the accommodation, the tofu is sealed by adhering the resin film so as to surround the accommodation recess 10 along the upper surface side of the flange portion 20 and closing the upper surface opening of the accommodation recess 10.

ここで、収容凹部１０に水とともに豆腐を収容した際には、底壁１１に豆腐と水とによる重力がかかる。底壁１１には、複数の第一リブ１３と第二リブ１４とが設けられており、複数の第一リブ１３は、底壁１１を第一リブ１３の長手方向に沿って表面１１Ｕから裏面１１Ｌ側又はその逆向きに撓み難くするように補強し、第二リブ１４は、底壁１１を第一リブ１３の長手方向と交わる周方向に沿って表面１１Ｕから裏面１１Ｌ側又はその逆向きに撓み難くするように補強している。よって、かかる容器１は、底壁１１に豆腐と水とによる重力がかかった状態において変形し難くなっている。   Here, when the tofu is accommodated together with water in the accommodating recess 10, the bottom wall 11 is subjected to gravity due to the tofu and water. A plurality of first ribs 13 and second ribs 14 are provided on the bottom wall 11, and the plurality of first ribs 13 are provided on the bottom wall 11 along the longitudinal direction of the first rib 13 from the front surface 11 </ b> U to the back surface. The second rib 14 is reinforced to make it difficult to bend on the 11L side or the opposite direction, and the second rib 14 extends from the front surface 11U to the back surface 11L side or the opposite direction along the circumferential direction intersecting the longitudinal direction of the first rib 13. Reinforced to make it difficult to bend. Therefore, the container 1 is difficult to be deformed in a state where the bottom wall 11 is subjected to gravity due to tofu and water.

以上、本実施形態に係る容器１によれば、熱可塑性樹脂シートが熱成形されてなる容器１であって、被収容物を載置するための表面１１Ｕ及び該表面１１Ｕの反対側の面である裏面１１Ｌを有する底壁１１と、該底壁１１の外周縁から立設された枠状の側壁１２と、前記底壁１１の表面１１Ｕの中央部領域から外周縁側に亘って凸設される長尺な第一リブ１３であって、前記底壁１１の周方向に離間して複数配置される第一リブ１３と、該第一リブ１３が設けられる表面１１Ｕの中央部領域と外周縁との間の位置で、中央部領域を囲うように前記周方向に沿って凸設される第二リブ１４とを備え、前記第二リブ１４は、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブ１３に交わっていることを特徴とする。   As mentioned above, according to the container 1 which concerns on this embodiment, it is the container 1 by which a thermoplastic resin sheet is thermoformed, Comprising: On the surface 11U for mounting a to-be-contained object, and the surface on the opposite side of this surface 11U A bottom wall 11 having a certain back surface 11L, a frame-like side wall 12 standing from the outer peripheral edge of the bottom wall 11, and a central region of the surface 11U of the bottom wall 11 projecting from the outer peripheral edge side. A long first rib 13, a plurality of first ribs 13 spaced apart in the circumferential direction of the bottom wall 11, a central region of the surface 11 </ b> U on which the first rib 13 is provided, and an outer peripheral edge And a second rib 14 that protrudes along the circumferential direction so as to surround the central region, and the second rib 14 has a convex portion that is long in the circumferential direction. A plurality of the first ribs 13 intersect with each other in a circumferentially spaced manner. And features.

かかる構成からなる容器１によれば、第一リブ１３と第二リブ１４とを底壁１１の同じ表面１１Ｕに備え、第二リブ１４は、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブ１３に交わっているため、第一リブ１３によって、底壁１１を第一リブ１３の長手方向に沿って表面１１Ｕから裏面１１Ｌ側又はその逆向きに撓み難くするように補強できると共に、第二リブ１４によって、底壁１１を第一リブ１３の長手方向と交わる周方向に沿って表面１１Ｕから裏面１１Ｌ側又はその逆向きに撓み難くするように補強できるので、被収容物の重力など底壁１１にかかる外力に対して容器１を変形し難くすることができる。   According to the container 1 having such a configuration, the first rib 13 and the second rib 14 are provided on the same surface 11U of the bottom wall 11, and the second rib 14 has a convex portion that is long in the circumferential direction. Since a plurality of protrusions are arranged apart from each other in the circumferential direction, and each convex portion intersects the first rib 13, the first rib 13 causes the bottom wall 11 to extend along the longitudinal direction of the first rib 13 to the surface 11U. From the front surface 11U to the back surface 11L side along the circumferential direction intersecting the longitudinal direction of the first rib 13 by the second rib 14 or from the back surface 11L side or the reverse direction thereof. Since it can be reinforced to make it difficult to bend in the opposite direction, the container 1 can be made difficult to be deformed by an external force applied to the bottom wall 11 such as the gravity of the object.

また、本実施形態に係る容器１では、各凸部は、少なくとも２つの第一リブ１３の長手方向途中位置同士を周方向に連結するように設けられており、各凸部の周方向の長さは、凸部同士の周方向の間隔よりも長くなるように構成されている。   Moreover, in the container 1 which concerns on this embodiment, each convex part is provided so that the longitudinal direction middle positions of the at least 2 1st rib 13 may be connected to the circumferential direction, and the length of the circumferential direction of each convex part is provided. The length is configured to be longer than the interval between the convex portions in the circumferential direction.

かかる構成からなる容器１によれば、第二リブ１４によって、底壁１１を第一リブ１３の長手方向と交わる周方向に沿って表面１１Ｕから裏面１１Ｌ側又はその逆向きに極めて撓み難くするように補強できるので、被収容物の重力など底壁１１にかかる外力に対して容器１を変形し難くすることができる。   According to the container 1 having such a configuration, the second rib 14 makes the bottom wall 11 very difficult to bend along the circumferential direction intersecting with the longitudinal direction of the first rib 13 from the front surface 11U to the back surface 11L side or vice versa. Therefore, it is possible to make it difficult for the container 1 to be deformed by an external force applied to the bottom wall 11 such as the gravity of the object.

尚、本発明は、前記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。   In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

本実施形態の容器１は、豆腐用容器として構成される場合について説明したが、これに限らず、容器１は、こんにゃくなどその他食品用の容器として構成されることも可能である。   Although the container 1 of this embodiment demonstrated the case where it was comprised as a container for tofu, it is not restricted to this, The container 1 can also be comprised as containers for other foodstuffs, such as konjac.

また、本実施形態の容器１を形成する熱可塑性樹脂シートや、該容器の密封に用いられる樹脂フィルムとしては特に限定されず、形状保持性に優れた白色や黒色の熱可塑性樹脂シート、及び、内部のカット豆腐が視認可能な透明性を有する樹脂フィルムを採用することができる。   Further, the thermoplastic resin sheet forming the container 1 of the present embodiment and the resin film used for sealing the container are not particularly limited, and white and black thermoplastic resin sheets excellent in shape retention, and It is possible to employ a transparent resin film in which the internal cut tofu is visible.

例えば、本実施形態の容器１を形成させるための前記熱可塑性樹脂シートとしては、ポリエチレンテレフタレート樹脂シート、ポリブチレンテレフタレートシート、ポリ乳酸樹脂シートなどのポリエステル系樹脂シート；ポリエチレン樹脂シート、ポリプロピレン樹脂シート、エチレン−酢酸ビニル共重合体樹脂シートなどのポリオレフィン系樹脂シート；ポリスチレン樹脂シート、ハイインパクトポリスチレン樹脂シートなどのポリスチレン系樹脂シート、ＰＡ６（ε−カプロラクタム開環重合体）シート、ＰＡ６６（アジピン酸とヘキサメチレンジアミンとの共縮重合体）シート、芳香族ポリアミド樹脂シートなどのポリアミド系樹脂シート、ポリ塩化ビニル樹脂シート、ポリカーボネート樹脂シートなどの樹脂シートや２種類以上の樹脂シートが積層された積層シート、前記樹脂シートと不織布などの樹脂シート以外のシートと樹脂シートとが積層された積層シートなどが採用可能である。   For example, as the thermoplastic resin sheet for forming the container 1 of the present embodiment, a polyester resin sheet such as a polyethylene terephthalate resin sheet, a polybutylene terephthalate sheet, a polylactic acid resin sheet; a polyethylene resin sheet, a polypropylene resin sheet, Polyolefin resin sheets such as ethylene-vinyl acetate copolymer resin sheets; polystyrene resin sheets such as polystyrene resin sheets and high impact polystyrene resin sheets; PA6 (ε-caprolactam ring-opening polymer) sheets; PA66 (adipic acid and hexa Copolycondensation polymer with methylenediamine) sheet, polyamide resin sheet such as aromatic polyamide resin sheet, resin sheet such as polyvinyl chloride resin sheet, polycarbonate resin sheet and two or more kinds of resin Laminated sheet the sheet is stacked, such as the resin sheet and the laminated sheet and the sheet and the resin sheet other than the resin sheet such as a nonwoven fabric are stacked can be employed.

尚、容器１の形成に用いる熱可塑性樹脂シートとしては、ポリオレフィン系樹脂シートが好適であり、なかでもポリプロピレン樹脂シートが特に好ましい。   In addition, as a thermoplastic resin sheet used for formation of the container 1, a polyolefin resin sheet is suitable, and a polypropylene resin sheet is particularly preferable.

また、本実施形態では、底壁１１は、平面視矩形をなす場合について説明したが、これに限らず、底壁１１は、平面視で円形や多角形（矩形を除く）をなして構成されることも可能である。   Further, in the present embodiment, the case where the bottom wall 11 has a rectangular shape in plan view has been described. However, the present invention is not limited thereto, and the bottom wall 11 is configured to have a circular shape or a polygonal shape (excluding a rectangular shape) in plan view. It is also possible.

また、本実施形態では、複数の第一リブ１３と第二リブ１４とは、底壁１１の表面１１Ｕに凸設される場合について説明したが、これに限らず、複数の第一リブ１３と第二リブ１４とは、底壁１１の裏面１１Ｌに凸設されることも可能である。   Moreover, although this embodiment demonstrated the case where the some 1st rib 13 and the 2nd rib 14 were protrudingly provided by the surface 11U of the bottom wall 11, not only this but the some 1st rib 13 and The second ribs 14 can be projected on the back surface 11 </ b> L of the bottom wall 11.

また、本実施形態では、第二リブ１４の各凸部は、平面視で略Ｌ形状や直線状をなす場合について説明したが、これに限らず、各凸部は、平面視で円弧状をなし、第二リブ１４は、平面視で円形状となるように複数の凸部が周方向に離間して配置されて構成されることも可能である。   In the present embodiment, each convex portion of the second rib 14 has been described as having a substantially L shape or a linear shape in plan view. However, the present invention is not limited thereto, and each convex portion has an arc shape in plan view. None, the second rib 14 may be configured such that a plurality of convex portions are spaced apart in the circumferential direction so as to be circular in plan view.

また、本実施形態では、第二リブ１４の各凸部は、５つ又は１０個の第一リブの長手方向途中位置同士を周方向に連結するように設けられる場合について説明したが、これに限らず、第二リブ１４の各凸部は、１つの第一リブ１３の長手方向途中位置を周方向に交わる（又は横断する）ように設けられたり、２つ以上（５つ又は１０個を除く）の第一リブ１３の長手方向途中位置同士を周方向に連結するように設けられることも可能である。   Moreover, although this embodiment demonstrated each convex part of the 2nd rib 14 provided so that the longitudinal direction middle positions of five or 10 1st ribs might be connected in the circumferential direction, Not only, but each convex part of the 2nd rib 14 is provided so that the middle direction of the longitudinal direction of one 1st rib 13 may intersect (or cross) in the peripheral direction, or two or more (5 or 10 pieces). It is also possible to provide the intermediate positions in the longitudinal direction of the first ribs 13 in the circumferential direction.

１・・・容器、１０・・・収容凹部、１０ａ・・・開口縁、１１・・・底壁、１１Ｌ・・・裏面、１１Ｕ・・・表面、１２・・・側壁、１３・・・第一リブ、１４・・・第二リブ、１４ａ，１４ｂ・・・第二リブの凸部、２０・・・フランジ部   DESCRIPTION OF SYMBOLS 1 ... Container, 10 ... Housing recessed part, 10a ... Opening edge, 11 ... Bottom wall, 11L ... Back surface, 11U ... Front surface, 12 ... Side wall, 13 ... No. One rib, 14 ... second rib, 14a, 14b ... convex portion of the second rib, 20 ... flange portion

Claims (2)

熱可塑性樹脂シートが熱成形された容器であって、
被収容物を載置するための表面及び該表面の反対側の面である裏面を有する底壁と、
該底壁の外周縁から立設された枠状の側壁と、
前記底壁の何れか一方の面の中央部領域から外周縁側に亘って凸設される長尺な第一リブであって、前記底壁の周方向に離間して複数配置される第一リブと、
該第一リブが設けられる前記一方の面の中央部領域と外周縁との間の位置で、中央部領域を囲うように前記周方向に沿って凸設される第二リブとを備え、
前記第二リブは、周方向に長尺な凸状の凸部が該周方向に離間して複数配置されて構成され、各凸部が前記第一リブに交わっていることを特徴とする容器。 A container in which a thermoplastic resin sheet is thermoformed,
A bottom wall having a front surface for placing an object to be accommodated and a back surface opposite to the surface;
A frame-like side wall erected from the outer peripheral edge of the bottom wall;
A long first rib projecting from the central region of any one surface of the bottom wall to the outer peripheral edge side, and a plurality of first ribs spaced apart in the circumferential direction of the bottom wall When,
A second rib projecting along the circumferential direction so as to surround the central region at a position between the central region and the outer peripheral edge of the one surface on which the first rib is provided;
The second rib includes a plurality of convex protrusions that are long in the circumferential direction and are spaced apart from each other in the circumferential direction, and each convex section intersects the first rib. . 各凸部は、少なくとも２つの第一リブの長手方向途中位置同士を周方向に連結するように設けられており、各凸部の周方向の長さは、凸部同士の周方向の間隔よりも長いことを特徴とする請求項１記載の容器。   Each convex portion is provided so as to connect the midway positions in the longitudinal direction of at least two first ribs in the circumferential direction, and the circumferential length of each convex portion is larger than the circumferential interval between the convex portions. 2. The container according to claim 1, wherein the container is long.
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