JP2014184983A - Container for cut tofu - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container for cut tofu in which the container is hard to cause a large difference in deformation resistance when a side pressure is applied to one of opposite two pairs of side wall part and when the side pressure is applied to the other, and a relatively high distortion resistance can be exhibited even when the side pressure is applied to any direction.SOLUTION: A container 1 for cut tofu is thermoformed of a thermoplastic resin sheet, and has a bottom wall 11 with an outer circumferential edge being rectangular in a plan view, rectangular frame-like peripheral side walls 12 rising up from the outer circumferential edge, and a flange 20 extending outward from the top part of the peripheral side wall. The bottom wall is formed of orthogonal ribs extending inward from each of four sides of the outer circumferential edge and extending along a substantially perpendicular direction to the circumferential direction of the outer circumferential edge. The orthogonal ribs are formed by several ribs at intervals in the circumferential direction at each side of four sides. The bottom wall is further provided with skew ribs extended along the direction from the corner of the outer circumferential edge to the central part of the bottom wall, and extended to the skewed direction to the four sides.

Description

  The present invention relates to a tofu container in which a thermoplastic resin sheet is thermoformed, and more particularly to a cut tofu container for accommodating cut tofu.

Conventionally, when distributing tofu manufactured in a food factory or the like to the market, it has been widely practiced to form a tofu pack in which a thermoplastic resin sheet is thermoformed and accommodated in a container and sealed with a resin film. Yes.
As a container for tofu used for forming this tofu pack, an accommodation recess opened at the top is formed by a bottom wall and a peripheral side wall rising from the outer peripheral edge of the bottom wall, and an accommodation recess defined by the top of the peripheral side wall In addition, a flange further extending outwardly from the opening edge of the housing is widely used, and the housing recess is made to contain tofu and heat sealed between the flange and the resin film. The type that seals tofu is widely used.

  The tofu that is housed in such a container for tofu and marketed in the form of a tofu pack is roughly divided into two types according to its production method, and cut tofu that has been formed in a standard size such as 1 or half A soy milk solution containing soy milk and a coagulant is quantitatively filled in a tofu container, sealed with a resin film, etc., and then heated with steam, etc. Things are known.

As a container for filled tofu for accommodating this filled tofu, since it is used in the above-mentioned manufacturing method, the degree of freedom in the shape of the accommodating recess is relatively high, and has a characteristic shape such as a hemispherical shape or a heart shape. It has been adopted.
On the other hand, the container for cut tofu for accommodating cut tofu is generally formed in a rectangular parallelepiped shape since the cut tofu is usually formed in a rectangular parallelepiped shape.
That is, a container for cut tofu usually has a bottom wall whose outer peripheral edge is rectangular in plan view and a rectangular frame-shaped peripheral side wall that rises from the outer peripheral edge of the bottom wall, and is slightly larger than cut tofu inside. A rectangular parallelepiped housing space is formed.

Such cut tofu containers have conventionally been required to be thin due to material cost, etc., in order to demonstrate the necessary strength while being thin, the inside of the container on the bottom wall and the peripheral side wall, or What formed the rib which protrudes on the container outer side is employ | adopted (refer the following patent document 1).
More specifically, the rectangular frame-shaped peripheral side wall has a rib extending along the depth direction (vertical direction) of the accommodation recess of the cut tofu container (hereinafter also referred to as “side wall rib”). Are formed at predetermined intervals in the circumferential direction of the peripheral side wall, and a rib continuous to the side wall rib is formed on the bottom wall so as to be applied to the cut tofu container from the vertical direction or from the side. Conventionally, the strength against compressive force (side pressure) is imparted.
Normally, a plurality of ribs are also formed on the bottom wall at predetermined intervals in the circumferential direction of the outer peripheral edge of the bottom wall, similarly to the side wall ribs.

The rib formed on the bottom wall extends inward from each of the four sides of the outer peripheral edge of the bottom wall, and is generally in a direction substantially orthogonal to the circumferential direction of the outer peripheral edge of the bottom wall. It is formed so that it may become an orthogonal rib extended along.
Regarding such a cut tofu container, for example, in Patent Document 1 below, a plurality of orthogonal ribs extending from one side adjacent to each other via a corner portion of the outer peripheral edge and a plurality of orthogonal ribs extending from the other side are provided. It is described that a container having a shape intersecting at the center of the bottom wall can be used as a container for tofu.

By the way, cut tofu containers are supplied to consumers from container manufacturers by forming a laminated structure called a “container stack” by laminating a plurality of containers, and when used, the cut tofu is the lowest in the container stack. The operation of taking out the containers for use in order is performed.
As a specific operation at this time, among the four side walls forming the peripheral side wall, the two side walls facing each other are sandwiched by a jig from the outside, and the lowest cut tofu container is placed. A method of gripping and removing the cut tofu container from the container stack is widely used.
However, if a container that easily deforms with respect to the side pressure is used as this cut tofu container, two lower cut tofu containers and upper cut tofu containers are simultaneously taken out from the container stack. There is a risk of it.

Accordingly, the cut tofu container is required to exhibit a certain level of resistance when the side wall is subjected to pressure from the outside.
When holding the cut tofu container with a jig or the like from the outside, for example, in a cut tofu container having a rectangular bottom wall in plan view, it is cut by applying force in the direction in which the side wall portion on the short side is approached. Two options are usually conceivable: to grip the tofu container or to apply a force in the direction of approaching the side wall on the long side.
At this time, it is not preferable that the direction in which the jig is sandwiched is limited, so the deformation resistance exerted in the long side direction is not extremely low compared to the short side direction or vice versa. Therefore, there is a demand for containers for cut tofu.
However, the conventional cut tofu container has a problem that it is difficult to satisfy such a demand.

JP 2000-25736 A

  An object of the present invention is to solve such a problem, and it is possible to reduce deformation resistance when a side pressure is applied to one of two opposing side wall portions and when a side pressure is applied to the other. It is an object of the present invention to provide a cut tofu container that hardly causes a large difference and that can exhibit a relatively high deformation resistance even when a lateral pressure is applied in any direction.

  As a result of intensive studies by the inventor to solve the above-mentioned problems, when a side pressure is applied to the opposing side wall, a mechanism for diffusing a force in a direction different from the direction in which the side pressure is applied is Applying to the wall is effective in obtaining a container for cut tofu that hardly causes a large difference in deformation resistance depending on the direction in which the lateral pressure is applied, and in addition to which direction such a mechanism is applied to the bottom wall. It was found that even when a side pressure is applied to the container, it is effective to cause the container for cut tofu to exhibit a relatively high deformation resistance.

  That is, the present invention relating to a cut tofu container for solving the above problems is used to contain cut tofu, a thermoplastic resin sheet is thermoformed, and the outer peripheral edge is rectangular in plan view, A rectangular frame-shaped peripheral side wall that rises from the outer peripheral edge of the bottom wall, and a flange that extends outward from the top of the peripheral side wall, each of the four sides of the outer peripheral edge having a rectangular shape in plan view on the bottom wall An orthogonal rib extending inward and extending along a direction substantially orthogonal to the circumferential direction of the outer peripheral edge is formed, and the orthogonal rib is spaced apart in the circumferential direction on each of the four sides. A plurality of cut tofu containers are formed, each extending along a direction from a corner portion of the outer peripheral edge toward a center portion of the bottom wall on the bottom wall, with respect to the four sides Further provided with skew ribs extending in the direction of inclination. It is characterized in that.

In the cut tofu container according to the present invention, orthogonal ribs extending inward from the four sides of the outer peripheral edge of the bottom wall having a rectangular shape in plan view are formed.
Further, the bottom wall of the cut tofu container according to the present invention extends along the direction from the corner of the outer peripheral edge toward the center of the bottom wall, and is inclined with respect to the four sides of the outer peripheral edge. In addition, skew ribs extending in the direction to be further provided.
Therefore, when the stress is applied so that the two side wall portions that are in the opposite positional relationship among the four side wall portions that form the peripheral side wall are close to each other, the deformation that occurs in the cut tofu container by the orthogonal ribs. Can be suppressed.
Further, the stress received by the orthogonal rib at this time is transmitted to the skewed rib and can be converted in the extending direction of the skewed rib.
That is, the container for cut tofu according to the present invention can diffuse the applied force in a direction different from the direction in which the force is applied.

Moreover, such an effect | action can be exhibited also when stress is applied in the direction which makes the side wall part different from the said side wall part approach.
That is, according to the present invention, it is difficult to cause a large difference in deformation resistance when a side pressure is applied to one of two opposing side wall portions and when a side pressure is applied to the other, and It is possible to provide a cut tofu container that can exhibit a relatively high deformation resistance even when a side pressure is applied in any direction.

The schematic perspective view showing the tofu pack in which the container for cut tofu concerning one embodiment of the present invention is used. The schematic perspective view showing the container for cut tofu which concerns on one Embodiment. The schematic sectional drawing showing the cross-sectional shape of the surrounding side wall shown by the AA line in FIG. The bottom view which showed the mode of the bottom wall of the container for cut tofu roughly. The bottom view which showed roughly the distribution situation of force. The schematic bottom view showing the rib shape of the bottom wall of the container for cut tofu which concerns on other embodiment. The schematic bottom view showing the rib shape of the bottom wall of the conventional container for cut tofu.

  Embodiments of the present invention will be described below with reference to the drawings, taking a cut tofu container as an example.

The cut tofu container of the present embodiment (hereinafter, also simply referred to as “tofu container”) is a thermoplastic resin sheet that has been subjected to thermoforming such as vacuum forming or pressure forming to give a three-dimensional shape, FIG. 1 is a schematic perspective view of a tofu pack in which cut tofu is sealed together with water in the cut tofu container of this embodiment, and FIG. 2 is a schematic perspective view of the cut tofu container.
In this specification, the direction related to the container depth indicated by the arrow H in FIGS. 1 and 2 is referred to as the vertical direction or the depth direction, and the direction indicated by the arrow D is the inside and outside. May be referred to as a direction or radial direction.
In the present specification, the direction indicated by the arrow R in FIGS.

  As shown in these drawings, the cut tofu container 1 (tofu container 1) of the present embodiment has an accommodation recess 10 having a rectangular opening at the top, and the accommodation recess 10 is cut together with water. The tofu 80 is sealed by the resin film 90 in a state where the tofu 80 is accommodated, and is used for forming the tofu pack 100.

  The container 1 for tofu of this embodiment has the accommodation recessed part 10 which comprises the accommodation space of the said cut tofu 80, and the flange 20 extended substantially horizontally outward from the opening edge 10e of this accommodation recessed part 10. As shown in FIG. Then, the resin film 90 is bonded to the upper surface side of the flange 20, and the bonding is performed so as to surround the opening edge 10 e of the receiving recess 10 along the flange 20 from the outside, thereby forming the annular seal portion 70. By so doing, the cut tofu 80 can be sealed.

The housing recess 10 is formed by a rectangular bottom wall 11 whose top surface is a mounting surface of the cut tofu 80 and a rectangular frame-shaped peripheral side wall 12 rising from the outer peripheral edge 11e of the bottom wall 11. The flange 20 is provided in the cut tofu container 1 so as to extend outward from the top of the peripheral side wall 12.
In the present embodiment, the bottom wall 11 has a rectangular shape in which the shape of the outer peripheral edge 11e in plan view is slightly smaller than the opening edge 10e of the housing recess 10 defined by the top of the peripheral side wall 12. It is almost square.
The contour shape of the tofu container 1 defined by the outer peripheral edge of the flange 20 in a plan view is also substantially square, and the shape of the opening edge 10e is also substantially square in plan view.
The peripheral side wall 12 is provided in the cut tofu container 1 in a state where the peripheral side wall 12 is slightly outwardly inclined with respect to a virtual plane that stands vertically along the outer peripheral edge 11 e of the bottom wall 11.

The peripheral side wall 12 is configured to have a rectangular frame shape (rectangular tube shape) by side wall portions 12a which are four plate-like portions respectively rising from each side of the outer peripheral edge of the substantially square bottom wall 11. As shown by reference numerals 12a1 to 12a4 in FIG. 2, the first side wall portion 12a1, the second side wall portion 12a2, the third side wall portion 12a3, and the fourth side wall portion 12 are sequentially arranged in the circumferential direction. It may be called the side wall part 12a4.
Further, in the following, among the four sides defining the outer peripheral edge 11e of the bottom wall 11, the first side that becomes the rising base end of the first side wall portion 12a1 is denoted by the reference numeral 11e1. It may be distinguished from other sides by referring to the first side or simply the first side.
Furthermore, the outer peripheral edge second side 11e2 (second side 11e2), respectively, also for the remaining three sides that are the rising base ends of the second side wall part 12a2, the third side wall part 12a3, and the fourth side wall part 12a4, The outer peripheral third side 11e3 (third side 11e3) and the outer peripheral fourth side 11e4 (fourth side 11e4) may be referred to.

Each side wall part 12a constituting the peripheral side wall 12 is provided with a plurality of ribs 12r (side wall ribs 12r) extending along the container depth direction, and the side wall ribs 120 in the present embodiment are: It is formed so that the cross-sectional shape in the horizontal plane becomes a substantially semicircular shape and projects outward.
That is, the side wall rib 12r in the present embodiment is formed in a shape protruding on the outer surface 12o side of the peripheral side wall 12, and has a recessed shape corresponding to the protruding shape (semicircular shape) on the outer surface side. It is formed on the inner surface 12 i side of the peripheral side wall 12.

In the present embodiment, the boundary between the first sidewall portion 12a1 and the second sidewall portion 12a2, the boundary between the second sidewall portion 12a2 and the third sidewall portion 12a3, the third sidewall portion 12a3 and the fourth sidewall portion 12a4, Side wall ribs 12r are also formed along the boundary at the corners 12ac of the peripheral side wall 12 serving as the boundary between the fourth side wall part 12a4 and the first side wall part 12a1.
In the present embodiment, the side wall portions from the first side wall portion 12a1 to the fourth side wall portion 12a4 share the formation status of the side wall ribs 12r and the like, and have the same shape in side view.

The bottom wall 11 has a substantially square shape in plan view as described above, and extends inwardly from the first side 11e1 to the fourth side 11e4 of the outer peripheral edge 11e of the square, and the outer peripheral edge 11e. An orthogonal rib 11r1 extending in a direction substantially orthogonal to the circumferential direction D is formed.
As shown in the figure, the cut tofu container 1 of the present embodiment has the orthogonal ribs 11r1 inward from the four sides from the first side 11e1 to the fourth side 11e4. A plurality of pieces are formed so as to extend.
In other words, a plurality of the orthogonal ribs 11r1 are formed at intervals in the circumferential direction D on each of the four sides.

In the present embodiment, the orthogonal rib 11r1 is formed to be continuous with the side wall rib 12r, and is connected to the lower end of the side wall rib 12r at the outer peripheral edge 11e of the bottom wall 11.
And as for the said orthogonal rib 11r1, the said cross-sectional shape is substantially common with the side wall rib 12r so that the cross-sectional shape may be shown in FIG. 3, and the bottom wall 11 used as the ground surface of the cut tofu container 1 of this embodiment. Is formed so as to protrude in a semicircular cross section on the lower surface 11o side.

In addition, as FIG. 4 which showed a mode that the bottom wall 11 was seen from the lower surface side was shown, the container 1 for cut tofu of this embodiment is directed to four corner | angular parts from the center part of the bottom wall 11. As shown in FIG. Further, four oblique ribs 11r2 arranged to be radial are further provided.
In other words, the skew rib 11r2 extends in a direction inclined with respect to the four sides of the bottom outer peripheral edge, and extends along the direction from the four corners of the outer peripheral edge 11e toward the center of the bottom wall 11. Has been extended.
The shape or the like of the skew rib 11r2 is not particularly limited. For example, the skew rib 11r2 can have the same shape as the orthogonal rib 11r1 and the side wall rib 12r.
More specifically, the width of these ribs can usually be 1 mm or more and 8 mm or less, and preferably 2 mm or more and 5 mm or less.
Moreover, the height of these ribs can be normally 1 mm or more and 8 mm or less, Preferably it is 2 mm or more and 5 mm or less.
Furthermore, the interval between the ribs in the orthogonal ribs 11r1 and the side wall ribs 12r can usually be 0.5 to 2.0 times the width of the ribs themselves.

In the present embodiment, the orthogonal ribs 11r1 at positions closest to the corners of the bottom wall 11 are connected to form L-shaped ribs at the corners.
The skew rib 11r2 of the present embodiment is in a state of being divided by a connecting portion 11ra between the orthogonal ribs 11r1 that are the bends of the L-shaped rib.
That is, among the plurality of orthogonal ribs 11r1 extending inward from the square first side 11e1 forming the outer peripheral edge 11 of the bottom wall 11, the orthogonal rib 11r1 extending from the position closest to the second side 11e2 is the second side 11e2. The orthogonal ribs 11r extending from the position closest to the first side 11e1 among the plurality of orthogonal ribs 11r1 extending inwardly from the inner side are connected on the diagonal line of the square, and the diagonal line at the connection point 11ra. The oblique rib 11r2 extending along the line is divided.
Similarly, between the second side 11e2 and the third side 11e3, between the third side 11e3 and the fourth side 11e4, and between the fourth side 11e4 and the first side 11e1, the orthogonal ribs 11r1 are also connected. Are connected to each other, and the oblique rib 11r2 is divided.
Therefore, when the skewed ribs 11r2 divided into two are counted as one each, strictly speaking, a total of eight skewed ribs 11r2 are formed in the cut tofu container 1 of the present embodiment. Will be.

The orthogonal ribs 11r1 other than the orthogonal ribs connected as described above are formed with a length less than the length from the outer peripheral edge 11e to the oblique rib 11r2 so as not to intersect the oblique rib 11r2. Yes.
More specifically, in the cut tofu container 1 of the present embodiment, the length of the orthogonal rib extending from the central part of each of the four sides is formed to be the longest, and the length of the orthogonal rib is increased from there toward both ends of the side. The orthogonal rib 11r1 is formed such that a line segment connecting the ends of the orthogonal ribs on the center side of the container has a mountain shape (key shape).
In the present embodiment, the shape and arrangement of the ribs on the bottom wall 11 are provided with four-fold rotational symmetry, and the shape in plan view changes substantially even after being rotated by 1/4 (90 degrees). An orthogonal rib 11r1 and a skewed rib 11r2 are formed on the bottom wall 11 so as not to occur.

Here, the functions of the orthogonal rib 11r1 and the oblique rib 11r2 will be described with reference to FIG.
In addition, here, a case where a side pressure is applied in a direction in which the second side wall portion 12a2 and the fourth side wall portion 12a4 are brought close to each other will be illustrated and schematically described.
The rib provided in a straight line usually does not substantially deform with respect to a force applied in the length direction, and effectively acts to exert deformation resistance on the container.
Therefore, when a stress of a magnitude “F” is applied to the orthogonal rib 11r1 of the fourth side wall portion 12a4 by the lateral pressure, the orthogonal rib 11r1 is hardly deformed, and the extension line and the oblique rib 11r2 intersect. The stress of the magnitude (F) as applied at the point is applied.
At this time, stress F is applied from the direction inclined with respect to the direction in which the skew rib 11r2 extends, so that the stress is applied to the stress (F1) in the direction in which the skew rib 11r2 extends and the direction. The vector acts on the stress (F2) in the width direction of the oblique rib 11r2 orthogonal to each other.
Further, the stress (F2) in the width direction of the skew rib 11r2 acts on the orthogonal rib 11r1 extending from the third side 11e3 serving as the base end of the third side wall portion 12a3 in a form of divided vectors. Become.

As described above, the rib has a high ability to prevent deformation with respect to the force applied in the length direction, but relatively deforms when force is applied in the direction of expanding and contracting the width. Easy to make.
Therefore, if the skew rib 11r2 is not provided, the stress of the size F acts directly as a deforming force that narrows the width of the orthogonal rib 11r1 extending from the third side 11e3, and thus acts directly on the cut tofu container. However, by providing the skewed rib 11r2 as described above, the deformation force acting on the orthogonal rib 11r1 extending from the third side 11e3 can be reduced to the magnitude F21.

Here, for the stress indicated by F1 in FIG. 5, another skewed rib (fourth side 11e4 and the fourth side 11e4) is located on the extension line of the skewed rib shown in FIG. 5 by the side pressure applied to the second side wall portion 12a2. Since the shape is opposed to the second stress generated in the skew rib extending from the corner with the first side 11e1, the second stress is offset and the deformation of the container is hardly involved. .
Note that the stress acting in the width direction of the skew rib 11r2 indicated by F2 in FIG. 5 functions in the direction of narrowing the width of the skew rib.
Therefore, it is preferable that the skew rib 11r2 is not easily deformed by such stress.
Note that the deformation of the rib due to the stress acting in the width direction is generally larger as the rib formation width is wider if the other conditions are the same. In this embodiment, the formation width of the skew rib 11r2 is increased. It is preferable to form it narrower than the formation width of the orthogonal rib.

In the above, in addition to the cut tofu container 1 by changing the direction of stress received by the orthogonal ribs by the oblique ribs extending along the direction from the corner of the outer peripheral edge of the bottom wall toward the center of the bottom wall 11 The mechanism for diffusing the force in a direction different from the direction of the applied force is an example in which a side pressure is applied in the direction in which the second side wall portion 12a2 and the fourth side wall portion 12a4 approach each other. Since the bottom wall 11 has four-fold rotational symmetry, the cut tofu container 1 has the same function as described above even when a side pressure is applied in the direction in which the first side wall 12a1 and the third side wall 12a3 are brought closer to each other. It can be demonstrated.
That is, it is difficult to cause a large difference in deformation resistance when a side pressure is applied to one of two opposing side wall portions and when a side pressure is applied to the other, and the side pressure is applied in any direction. Even when added, a relatively high deformation resistance can be exhibited.

  Such an effect is achieved by a conventional tofu container 1x (see FIG. 7) having a shape in which a plurality of orthogonal ribs 11rx extending from each side of the outer peripheral edge of the bottom wall 11x intersect at the center of the bottom wall. This is an effect unique to the present invention that is difficult to expect.

Even if the shape of the bottom wall 11 in plan view is not substantially square and has four-fold rotational symmetry, the effect of the present invention is not limited to the outer peripheral edge of the bottom wall 11 ′ as shown in FIG. The cut tofu container 1 ′ having the shape of 11e ′ having a substantially rectangular shape in plan view is also exhibited in the same manner.
As the cut tofu container, when the bottom wall 11 ′ has a substantially rectangular shape in plan view, it passes through the corners of the rectangle, and the short side 11a1 ′ and the long side 11a2 ′ of the rectangle. In order to diffuse the stress applied along the orthogonal ribs 11r1 ′, the oblique ribs 11r2 ′ are extended along imaginary lines passing through the corners so that the angles formed by Is preferred.
That is, it is preferable that the skew rib 11r2 ′ extends so as to form an angle of about 45 degrees with respect to the short side 11a1 ′ and the long side 11a2 ′.

In such a cut tofu container 1 ′ having a rectangular shape in plan view, the stress diffusion effect by the oblique rib 11 r 2 ′ is exhibited, so that a side pressure is applied so as to make the long side approach, and the short side is made to approach. It can be suppressed that a large difference in deformation resistance occurs when a side pressure is applied.
Therefore, when the container stack is formed in the same manner as the cut tofu container 1 having a square shape as shown in FIG. 2, the operation of taking out the container from the lowest cut tofu container can be easily performed.

  In addition, it does not specifically limit as the thermoplastic resin sheet which forms the container 1 for tofu of this embodiment, and the resin film 90 used for sealing of this container for tofu, In the shape retainability utilized for the conventional tofu pack An excellent white or black thermoplastic resin sheet and a transparent resin film in which the cut tofu inside can be visually recognized can be employed.

For example, as the thermoplastic resin sheet for forming the tofu container 1 of the present embodiment, polyester resin sheets such as polyethylene terephthalate resin sheet, polybutylene terephthalate sheet, polylactic acid resin sheet; polyethylene resin sheet, polypropylene resin Sheet, polyolefin resin sheet such as ethylene-vinyl acetate copolymer resin sheet; polystyrene resin sheet, polystyrene resin sheet such as high impact polystyrene resin sheet, PA6 (ε-caprolactam ring-opening polymer) sheet, PA66 (adipic acid And hexamethylenediamine copolycondensation polymer) sheet, polyamide resin sheet such as aromatic polyamide resin sheet, resin sheet such as polyvinyl chloride resin sheet and polycarbonate resin sheet Laminated sheet resin sheet are laminated, and 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.
In addition, as a thermoplastic resin sheet used for formation of the container 1 for tofu, a polyolefin-type resin sheet is suitable, and a polypropylene resin sheet is especially preferable especially.

  Further, as the resin film 90, a transparent resin film to which heat sealability is imparted by forming at least the surface with a polypropylene resin or a polyethylene resin can be suitably employed.

  Further, the method for producing the tofu container 1 and the tofu pack 100 by these is not particularly limited, and a conventional thermoforming method such as vacuum forming, pressure forming, or vacuum / pressure forming can be employed.

The tofu container of the present invention is not limited to the above examples. For example, in the above, when a lateral pressure is applied, the direction in which the force is applied is diffused and the cut tofu container has excellent deformation. The case where the oblique rib is formed on the bottom wall in an independent state without intersecting the oblique rib and the orthogonal rib in order to exert the effect of imparting resistance more significantly is exemplified. Some of them may be connected to the skew ribs.
Further, the oblique ribs may be connected to each other. For example, instead of the embodiment shown in FIGS. 2 and 4 in which 4 (8) oblique ribs are provided in an independent state, they intersect at the center of the bottom wall. Skew ribs connected in a cross shape may be formed.
Furthermore, the present invention can be implemented by adding various modifications to the above-described exemplary embodiments within a range where the effects of the present invention are not significantly impaired based on conventionally known technical matters.

DESCRIPTION OF SYMBOLS 1 Cut tofu container 10 Containing recessed part 10e Open edge 11 Bottom wall 11r1 Orthogonal rib 11r2 Skew rib 12 Peripheral side wall 12r Side wall rib 20 Flange 80 Cut tofu 90 Resin film 100 Tofu pack

Claims (6)

A bottom wall whose outer peripheral edge is rectangular in plan view, a rectangular frame-shaped peripheral side wall that rises from the outer peripheral edge of the bottom wall, and is used to contain cut tofu, is formed by thermoforming a thermoplastic resin sheet, A flange extending outward from the top of the side wall, and extending inward from each of the four sides of the outer peripheral edge of the rectangular plan view on the bottom wall, and a direction substantially orthogonal to the circumferential direction of the outer peripheral edge The orthogonal ribs extending along the four sides are formed, and the orthogonal ribs are formed in a plurality of pieces at intervals in the circumferential direction on each of the four sides,
The bottom wall further includes a skewed rib extending along a direction from a corner portion of the outer peripheral edge toward a central portion of the bottom wall and extending in a direction inclined with respect to the four sides. A container for cut tofu.   The cut tofu container according to claim 1, wherein the skew rib is formed to have a narrower width than the orthogonal rib.   The cut tofu container according to claim 1 or 2, wherein a part or all of the orthogonal rib is formed to have a length less than a length from the outer peripheral edge to the skewed rib so as not to intersect the skewed rib. .   The container for cut tofu according to any one of claims 1 to 3, wherein the orthogonal rib and the oblique rib are formed so as to protrude to a lower surface side of the bottom wall.   The shape of the outer periphery of the said bottom wall is planar view substantially square shape, The said skew rib is formed in the direction along the diagonal of this square, For cut tofu of any one of Claims 1 thru | or 4 container.   The shape of the outer peripheral edge of the bottom wall is a substantially rectangular shape in plan view, passes through the corners of the rectangle, and further passes through the corners so that the angles formed by the short and long sides of the rectangle are substantially equal. The container for cut tofu according to any one of claims 1 to 4, wherein the skew rib is extended along a line.

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