JP3092660U - Natto container - Google Patents

Abstract

(57) [Summary] (Problem corrected) [Problem] To provide a natto container in which a cross wind in a fermentation chamber enters the container from around the lid and natto dries and becomes hard and the bean color does not turn black. thing. A step width of a step portion of a container body is set to the container body.
Are formed wide at each of the corners 11a to 11d, the step width therebetween is made small, and the small width portion is formed with the small width portion 12-1.
Each of the corners 14a to 14c of the fitting protrusion 8 is configured so that the slope of the slope protrudes from one surface of the lid 5 so as to narrow the width of the inclined surface toward the opening side from 2d. 14d, the outside surface width is wide and the outside surface width between them is
It is formed narrower in proportion to the position from.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a natto container, and in particular, a gap generated between a container containing natto and a lid. With a simple structure, it is possible to ensure that the lateral ventilation generated in the fermentation chamber from the space enters the vessel. The present invention relates to a natto container having a structure that can be shut off.

[0002]

[Prior art]

  As is well known, in general, natto is a raw material soybean that is soaked and steamed, and then natto Fermentation chamber containing the inoculated seeds in a container with external dimensions of approximately 99 x 99 x 30 mm After putting it in the container for a certain period to ferment it, put the mustard and soy sauce containers in the container and package Ship.   The container is a container for accommodating natto by heat-pressing a foamed resin sheet member. The body and the container body are integrally connected via a hinge to close the opening of the container body. It is composed of a lid.   By blocking the aeration of natto stored in a container with such a configuration, the temperature load can be reduced. It is configured to effectively suppress the ammonia generated in the secondary fermentation of Bacillus natto. It was done. As an example, it is described in JP-A-2002-166990. Natto containers and the like having a known structure are known.

[0003]   This container comprises a container body having a substantially concave cross section and an upper end portion of the container body. It is composed of a double lid that is continuously formed on one side of the flange that extends horizontally outward from The natto is constructed so that the opening of the container body can be closed with the double lid. In the container, the inner peripheral surface of the upper part of the container body is inclined downward toward the inside of the container. A slanted surface is provided, and a hinge part for connecting the common lid and the container body is provided in the middle of this slanted surface. It is constructed so that the mating protrusions formed on the three sides or the entire circumference of the lid together with one side are joined However, each joint surface between the upper inner peripheral surface of the container body and the fitting protruding side of the common lid should be smooth. The joint surface between the inner peripheral surface of the upper part of the container body and the fitting projection of the common lid is in contact with each other. Is formed by one or more steps that can be fitted together, and a fitting protrusion of the lid together with the upper inner peripheral surface of the container body. Each joint surface with the side is formed by continuous irregularities along the circumferential direction, and these irregularities mesh with each other. In the vicinity of the shoulder step between the upper inner peripheral surface of the container body and the natto storage section, The mating ridges on the common lid are joined together to block the ventilation of natto after fermentation stored in the container. It is configured to cut off.

[0004]

[Problems to be solved by the device]

  However, the inner peripheral surface of the upper part of the container body is inclined toward the inside of the container and has a sloped surface, In the middle of this inclined surface, the fitting projection formed on the entire circumference of the lid is joined. The joint surfaces of the upper inner peripheral surface of the container body and the fitting protrusions of the common lid are both formed to be smooth. , The joint surfaces of the upper inner peripheral surface of the container body and the fitting protrusion of the common lid can be jointed together It is formed by one or more steps, and each of the inner peripheral surface of the upper portion of the container body and the fitting protrusion of the common lid is The joint surface should be formed with continuous irregularities along the circumferential direction so that these irregularities mesh with each other. Then, fit the joint lid around the shoulder step between the inner peripheral surface of the upper part of the container body and the natto storage part. Although the mating ridge is joined, the inclination angle of the inclined surface and the outer inclination of the fitting ridge are At the same angle, the dimension from the edge of the opening to the step is the same as the dimension of the fitting protrusion. Therefore, even if it comes in sliding contact and abutment, the constituent material of the container itself is processed from a thin plate of foamed resin. Since the joint lid is weak, the fitting force between the lid and the container body is weak. It is difficult to resist the elasticity that occurs and it is possible to avoid vibration due to vibrations etc. applied to the container during the process of loading into the fermentation chamber. A gap is created between the lid and the container body, and cross wind in the fermentation chamber easily enters the container. With such a configuration, there is no great expectation for the ventilation blocking effect.   Therefore, in the fermentation room, the placement of the natto stand and the orientation of the natto container should be fixed. Otherwise, even if the film from the side is covered with wind, the slope will be uneven and It is said that natto will dry because there is a gap between the surface and the periphery of the film film. There's a problem.

[0005]

[Means for Solving the Problems]

  In order to solve the above-mentioned problems, the present invention proposes a substantially rectangular container having a substantially concave cross section. Of the container main body 1 and the flange 3 extending horizontally outward from the opening end 2 of the container main body 1. It is composed of a lid body 5 connected to one side via a hinge 4, and the lid body 5 covers the flange 3 above. Is configured to cover the opening of the container body 1 including the inner peripheral surface 6a to 6d of the container body 1. The inclined surface 7 having a downward slope toward the inside of the container, the opening edge side of the inclined surface 7, the The outer peripheral surface 9 of the fitting protrusion 8 having a substantially V-shaped cross section formed over the entire circumference on one surface of the lid is The slanted inclined surface 7a to be joined and the underside of the inclined surface 7a extend to the inside of the container body. As described above, the natto container has the step portion 10 with which the leading end 21 of the fitting protrusion 8 abuts. Be careful

[0006]   The first point is that the step width of the stepped portion 10 of the container body 1 is If each of the corners 11a to 11d is configured to have a wide width and the step width between them is made to be a very small width, In addition, the narrow width portions 12a to 12d are closer to the opening side than the wide width portions 13a to 13d. Form so that it will be in a bid position so as to narrow the width of   The second point is that the protrusion height of the fitting protrusion 8 from one surface of the lid 5 is approximately The wide portions 13a to 13d are formed at the corners 14a to 14d of the fitting protrusion 8 having a shape. The width in the height direction of the outer peripheral surface is widened so that the leading end 21 of the fitting projection 8 comes into contact with the width. Wide portions 15a to 15d are formed, and the width of the outer peripheral surface therebetween is set to the narrow width portions 12a to 12d by the fitting protrusion. In proportion to the position from the opening end of the stepped portion 10 so that the leading portion 19 of the side 8 contacts It is formed so as to be narrowed to form narrow portions 16a to 16d, and the inclination of the container body 1 is also increased. Compared to the inclination angle of the surface 7, the inclination angle of the outer side surface 9 of the fitting protrusion 8 is set to be slightly obtuse. Done,   The third point is that the inclination drawn along the inclined surface 7a of the container body 1 Compared to the angle α at which the extension line 17 of the surface 7 a and the horizontal line 18 intersect, the outside of the fitting protrusion 8 The angle β at which the extension line 19 of the surface drawn along the peripheral surface 9 and the horizontal line 18 intersect is It is slightly obtuse and the intersection 20 of the extension lines 17 and 19 is slightly above the step 10. Is formed so as to be positioned, and the intersection point is formed between the inclined surface 7 and the outer peripheral surface 9 of the fitting protrusion 8. The area between 20 and the leading portion 21 of the fitting protrusion 8 is formed by utilizing the elasticity of the container material. Are configured so that they can be slidably engaged with each other,   Furthermore, the fourth point is that the flat bottom 23 of the container portion 22 of the container body 1 is One of the inclined surfaces 7b having the same inclination angle as that of the inclined surface 7 below the step portion 10, Increases the strength of the container in the lower part of the inclined surface 7b and the bottom part 23 which oppose each other. A coating film (corrugated film) 24 is formed to cover the natto (corrugated film). (Not shown) so that there is no gap between the peripheral edge (not shown) and the inclined surface 7b. In the fermentation chamber, it prevents lateral infiltration of natto stored in the container. It is configured to obtain.

[0007]

[Embodiment of device]

  The basic structure of the natto container of this invention is as shown in Fig. 1 to Fig. 3. Polyethylene terephthalate (PET), polypropylene (PP), expanded polystyrene Len (PS) thin plate material, paper, biopolymer, biodegradable polymer, etc. as natural materials The outer dimensions are approximately 99 x 99 x 30 mm, and the natto is stored by superheated press molding. The bottom cross-sectional area is smaller than the opening flat area. A container body 1 having an inverted ladder shape with a substantially rectangular cross section and four spherical bottom corners. One of the rectangular flanges 3 extending horizontally outward from the open end 2 of the container body 1. It is composed of a rectangular lid body 5 that is continuous with a side via a hinge 4, and the lid body 5 is used to It is configured to cover the opening of the container body 1 including the upper part of the container 3.

[0008]   Further, as shown in FIGS. 1 to 3, the inner peripheral surface 6a of the upper part (opening side) of the container body 1 6d is a sloping surface 7 with a downward slope toward the inside of the container, and on the opening edge side of this sloping surface 7 , Pushing from one side to multiple sides to compensate for the weakness due to the lid 5 being a thin plate The outer peripheral surface 9 of the fitting protrusion 8 whose cross-section formed around the entire circumference to form a V-shape The slanted surface 7a that joins with each other and water from the lower side of the slanted surface 7a to the inside of the container body 1 The outer peripheral surface 9 on the outer side abuts from the leading end 21 of the fitting protrusion 8 so as to project in the horizontal direction. And a step portion 10 to be formed.   As shown in FIGS. 1, 3 and 4, the flat bottom portion 23 of the container portion 22 of the container body 1 And one of the side wall surfaces 7b having the same inclination angle as the inclined surface 7 below the stepped portion 10. Or, the strength of the container is increased by the lower portion of the inclined surface 7b and the bottom portion 23 which are opposed to each other. A corrugated film for forming a corrugated (call gate) 24 and covering it on the natto (Fig. (Not shown) is configured so that no gap is created between the peripheral edge (not shown) and the inclined surface 7b. .   Aeration necessary for fermentation of natto is provided inside the area where the fitting protrusion 8 of the lid 5 is formed. A large number of small holes 25 for carrying out are regularly formed in the vertical and horizontal directions. This small hole 25 The diameter is so small that the stickiness and juice of natto cannot easily leak out of the container.

[0009]   The natto container 1 of the present invention has the above-mentioned basic structure as shown in FIGS. The step width of the step portion 10 of the container body 1 at each of the corners 11a to 11d of the container body 1 The width is made wide, and the step width between them is made a small width, and the small width portion 12 is made a wide portion 1. It is in a position where it is raised so as to narrow the width of the inclined surface 7a from the position 3 toward the opening end 2 side. And the protruding height of the fitting protrusion 8 from one surface of the lid 5 is a substantially rectangular fit. The fitting is performed on the wide portions 13a to 13d at the corners 14a to 14d of the joint side 8. The width of the outer peripheral surface in the height direction is widened so that the leading portion 21 of the protrusion 8 comes into contact with the wide portion. 15a to 15d, and the width of the outer peripheral surface between the narrow width portions 12a to 12d is set to the fitting protrusion 8 Of the stepped portion 10 is narrowed in proportion to the position from the opening end of the stepped portion 10 so that the leading portion 21 of the To form the narrow portions 16a to 16d, the four corners 1 of the container body 1 are formed. The wide portions 13a13d and 15a15d in 1a to 11d correspond to the four corners 11a. Sliding contact fit between the narrow width portions 12a to 12d and the narrow width portions 16a to 16d at locations other than 11d. Because of this, the confidentiality is improved.   The step width and the step position of the stepped portion 10 and the outer periphery of the fitting protruding side 8 are different places. During the interval, the width gradually changes from the narrow part to the wide part, and the position gradually changes from the low part to the high part. It has been transformed into a series.

[0010]   Further, as shown in FIGS. 5 to 8, the volume of ventilation from the lateral direction of the container into the container body 1 is reduced. In order to more reliably block the invasion into the container, the smooth inclined surface 7a of the container body 1 The angle α between the extension line 17 and the horizontal line 18 of the inclined surface 7a drawn along The extension line 19 of the surface 9 drawn along the outer peripheral surface 9 of the leading portion of the fitting protrusion 8 and The angle β at which the horizontal line 18 intersects is made slightly obtuse, and the intersection 20 between the two extension lines 17 and 19 is It is formed so as to intersect a little above the position of the stepped portion 10, and is fitted with the inclined surface 7a. From the intersection point 20 with the outer peripheral surface 9 of the leading portion of the protruding side 8, the leading portion 21 of the fitting protruding side 8 Between the outer peripheral surface 9 and the inclined surface 7a and the step portion 10 by utilizing the elasticity of the material Both sides are designed so that they can be slidably engaged with each other.

[0011]

【Example】

  The natto container of this invention has the configuration described above, and when using this natto container 2 as shown in FIGS. 2 and 3, attach the lid 5 to the same horizontal plate as the flange 3 of the container body 1. After opening the lid so that it becomes a bell, soak the raw material soybeans in the container body 1 and steam, and contact the natto bacteria. After adding 50 g of the seeds, cover the film on the natto and then cover 5 Close and place in the fermentation chamber to ferment.

[0012]   As shown in FIGS. 1 to 4, the container according to the present invention includes a step portion 10 of the container body 1. The step width is wide at each of the corners 11a to 11d of the container body 1, and the step between them is wide. The width is made to be a small width, and the narrow width portion 12 has the inclined surface on the opening side from the wide portion 13. The fitting protrusion 8 is formed so as to be in a bid position so as to narrow the width of 7a. Corners 14a to 14d of the fitting projection 8 having a substantially rectangular projection height from one surface of the lid body 5 of FIG. At the front of the fitting protrusion 8 so that the leading end 21 of the fitting protrusion 8 comes into contact with the wide portions 13a to 13d. The width of the outer peripheral surface in the height direction is widened to wide portions 15a to 15d, and the outer peripheral surface width between them is The step is formed so that the leading portion 21 of the fitting projection 8 comes into contact with the narrow width portions 12a to 12d. Formed so as to narrow in proportion to the position from the opening end of the portion 10 to form narrow portions 16a to 16d By doing so, the outer peripheral surface width is wide so that the leading portion 21 abuts, and the outer peripheral surface width therebetween is large. The head portion 19 of the fitting protrusion 8 is brought into contact with the narrow width portions 12a to 12d. It is formed to be narrow in proportion to the position from the opening end of the step portion 10, especially in a corner portion where a gap is likely to occur. Prevent the formation of gaps.

[0013]   The flat bottom 21 of the container portion 20 of the container body 1 and the tilt below the stepped portion 10 Of the side wall surfaces 7b having the same inclination angle as the slope surface 7, one or both of the opposing slope surfaces 7b Corrugations (call gates) 2 for increasing the strength of the container in the lower part and the bottom 23 4 is formed to cover the natto with the film, the rim and the inclined surface 7b Since it was configured so that the space between the two is in close contact and there is no gap between the two, Stored in a container that is configured to prevent lateral ventilation from entering the container I tried to eliminate the drying of natto after fermentation.

[0014]   Further, as shown in FIGS. 5 to 8, the drawing is performed along the inclined surface 7a of the container body 1. Compared to the angle α between the extension line 17 of the inclined surface 7a and the horizontal line 18, the fitting protrusion 8 is an extension line 19 of the surface 9 drawn along the outer peripheral surface 9 from the head portion 21 of The angle β at which the horizontal line 18 intersects is made slightly obtuse, and the intersection 20 between the two extension lines 17 and 19 is 7 to 9 because they are formed so as to intersect at a position slightly above the stepped portion 10. As shown in, the four corners 11a to 11d of the container body 1 and the other parts The wide portions 13a13d and 15a15d are other than the four corner portions 11a to 11d. Since the narrow width portions 12a to 12d and the narrow width portions 16a to 16d are slidably engaged with each other at The tightness is good, and also the outer circumference from the leading end 21 of the inclined surface 7a and the fitting protrusion 8 is The outer surface 9 from the intersection 20 to the leading portion 21 of the fitting projection 8 and the front surface Since the inclined surface 7a can be strongly slidably engaged with each other by utilizing the elasticity of the material, Very good airflow blocking property. Natto does not dry and become hard, and the bean color does not turn black. Yes.

[0015]   Even if the lid 5 is fitted to the container body 1 as described above, it is necessary for growing the Bacillus natto during fermentation. Aeration is taken into the container through the small holes 23, and the lid 5 is used during the fermentation period before shipment. Even if you take in the ventilation required for the above-mentioned growth from the gap created by slightly loosening good.   Usually, cover the natto with a film film before putting it in the fermentation chamber. It is not necessary because it has a good airflow blocking property. Cover the natto with a film film only to put a container containing oil, and then cover 5 By closing, the fitting protrusion 8 and the slope 7a of the container body 1 and the step portion 10 can be fitted well. The natto becomes dry and hard even after it has been tightly slid into contact and shipped to the market. Bean color does not turn black.   The commercialized natto containers are packaged in single or multiple units and shipped to the market.

[0016]

【effect】     The invention according to claim 1 is a container body 1 having a substantially rectangular cross-sectional shape, One side of the flange 3 that extends horizontally outward from the opening end 2 of the container body 1 has a hinge. And a lid body 5 continuous with a flange 4 between the flange body 3 and the lid body 5. It is configured to cover the opening of the container body 1, and the upper inner peripheral surface 6a of the container body 1 to   6d is an inclined surface 7a that descends downward toward the inside of the container, and the opening edge of this inclined surface On the side, a fitting protrusion whose cross-section formed on one surface of the lid 5 over the entire circumference is substantially V-shaped 8 is a smooth inclined surface 7a to which the outer peripheral surface 9 is joined, and the bottom of the inclined surface 7a Step portion 10 with which the outer peripheral surface 9 of the leading portion of the fitting projection 8 abuts so as to project inside 1 In the natto container configured with, the step width of the step part 10 of the container body 1 is The corners 11a to 11d of the container body 1 are configured to be wide, and the step width between them is set to be a small width. In addition, the width of the inclined surface is closer to the opening side than the width portions 12 to 12d. So as to be narrowed down so as to be in a bid position, The protrusion height from one surface is set to the front at each of the corners 14a to 14d of the fitting protrusion 8 having a substantially rectangular shape. The outer peripheral surface of the outer peripheral surface is set so that the leading portion 21 of the fitting projection 8 comes into contact with the wide portions 13a to 13d. The width in the height direction is widened to wide parts 15a to 15d, and the width of the outer peripheral surface between them is the above-mentioned small width. The stepped portion 10 is opened so that the leading portion 21 of the fitting projection 8 comes into contact with the portions 12a to 12d. By narrowing in proportion to the position from the mouth end to form narrow portions 16a to 16d , The outer peripheral surface width is wide so that the leading portion 21 abuts, and the outer peripheral surface width between them is very small. The stepped portion 10 of the stepped portion 10 is arranged so that the leading portion 21 of the fitting projection 8 comes into contact with the width portions 12a to 12d. By making it narrower in proportion to the position from the opening end, the natto stand can be placed in the fermentation chamber. It is not necessary to keep the direction of the container and natto uniform, and the cross wind generated in the fermentation chamber Can be prevented from entering the container from the four corners of the container and its intermediate parts, and even after shipping Has good airflow blocking properties, and natto does not become dry and hard and the bean color does not turn black. Has the effect of saying.

[0017]        In addition to the device according to claim 1, the device according to claim 2 includes the container body 1 In the above configuration, in comparison with the inclined surface angle of the inclined surface 7a of the container body 1, the fitting protrusion The outer peripheral surface 9 of 8 has a slightly obtuse inclination angle, so that the ventilation blocking property is further improved. Cross wind in the fermentation chamber enters the container from around the lid and the natto becomes dry and hard, and also bean color. Has the effect of not being blackened.

[0018]       In addition to the inventions of claims 1 and 2, the device according to claim 3 includes the container An extension line 17 and a horizontal line 18 of the inclined surface 7a drawn along the inclined surface 7a of the main body 1. The extension of the surface 9 drawn along the outer peripheral surface 9 of the fitting protrusion 8 as compared with the angle α at which The angle β at which the line 19 intersects with the horizontal line 18 is slightly obtuse and both extension lines 17, 19 The intersection point 20 is formed so as to intersect at a position slightly above the stepped portion 10, and From the intersection point 20 between the inclined surface 7a and the outer peripheral surface 9 of the leading portion of the fitting projection side 8, the fitting projection is formed. The wide portion 1 is provided between the outer peripheral surface 9 of the side 8 up to the leading portion 21 and the step portion 10 of the inclined surface 7a. 3a13d and 15a15d are provided at locations other than the four corners 11a to 11d. The narrow width portions 12a to 12d and the narrow width portions 16a to 16d are slidably engaged with each other, so that the ventilation is blocked. Even better, cross wind in the fermentation chamber enters the container from around the lid and the natto will not dry and become hard. It also has the effect that the bean color does not turn black.

[0019]   The invention according to claim 4 is such that the flat bottom portion 23 of the container portion 22 of the container body 1 and the step One or both of the side wall surfaces 7b having the same inclination angle as the inclined surface 7 below the portion 10. To increase the strength of the container on the lower part of the inclined surface 7b which opposes and the bottom 23. The corrugated (call gate) 24 is formed and the upper part of the inclined surface 7b is made smooth, There is a gap between the periphery of the film that can be overlaid on the beans and the inclined surface 7b, and there is a gap. Since there is little gap between the fermented natto and fermented natto after fermentation in the container, Ventilation can prevent entry into the container.

[Brief description of drawings]

FIG. 1 is a perspective view of a natto container showing an embodiment of the present invention in an open state.

FIG. 2 is a plan view showing a state in which the lid is also opened in a horizontal state.

FIG. 3 is a side view showing a state in which the lid is also opened in a horizontal state.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a sectional view taken along the line BB in FIG.

6 is a cross-sectional view taken along the line C-C in FIG.

FIG. 7 is a cross-sectional view showing a fitted state of the inclined surface and the fitting projected side when the lid is closed at the BB disconnection position in FIG.

FIG. 8 is a cross-sectional view showing a fitted state of the inclined surface and the fitting projected side when the lid is closed at the CC disconnection position in FIG.

FIG. 9 is a cross-sectional view of the container body with the lid body covered.

[Explanation of symbols]

1 container body 2 Open end 3 flange 4 hinges 5 Lid 6a-6d inner peripheral surface 7,7a, 7b inclined surface 8 Mating protrusion 9 outer peripheral surface 10 steps 11a to 11d corners 12a-12d Small width part 13a to 13d wide part 14a to 14d corners 15a to 15d wide part 16a to 16d narrow part 17,19 Extension line 18 horizon 20 intersections 21 beginning 22 Container part 23 bottom 24 wave type (call gate) 25 small holes

Claims (4)

[Scope of utility model registration request] 1. A container body 1 having a substantially rectangular cross-section and a flange 3 extending horizontally outward from an open end 2 of the container body 1 via a hinge 4. The lid 5 is connected to the lid 5, and the lid 5 covers the opening of the container body 1 including the flange 3. The upper inner peripheral surfaces 6a to 6d of the container body 1 face the inside of the container. And the outer peripheral surface 9 of the fitting protrusion 8 having a substantially V-shaped cross section formed over the entire circumference on one surface of the lid 5 is provided on the opening edge side of the inclined surface 7. In a natto container having a smooth inclined surface 7a to be joined and a step portion 10 with which the leading end portion 21 of the fitting protruding side 8 abuts so as to project from the lower side of the inclined surface 7a to the inside of the container body 1, The step width of the step portion 10 of the container body 1 is set to the container body 1
Each of the corners 11a to 11d has a wide width, and the step width between them is made to be a small width, and the small width portions 12a to 12d are also formed.
Is formed so as to be in a bid position so as to narrow the width of the inclined surface 7a on the opening side from the wide portions 13a to 13d,
The protrusion height of the fitting protrusion 8 from one surface of the lid 5 is substantially square. At the corners 14a to 14d of the fitting protrusion 8, the leading portions of the fitting protrusion 8 are located in the wide portions 13a to 13d. The width of the outer peripheral surface in the height direction is widened so that the abutting portion 21 abuts the wide portion 1.
5a to 15d, and the width of the outer peripheral surface between them is set to the narrow width portion 1
By forming the narrow portions 16a to 16d by narrowing in proportion to the position from the opening end of the stepped portion 10 so that the leading portion 19 of the fitting protruding side 8 comes into contact with 2a to 12d,
A natto container characterized in that it is constructed so as to block the ventilation that laterally enters the container. 2. The inclination angle of the outer peripheral surface 9 of the front portion of the fitting projection 8 is set to be slightly obtuse as compared with the inclination angle of the inclined surface 7a of the container body 1. Natto container. 3. Along the outer peripheral surface 9 of the fitting protrusion 8, as compared with the angle α at which the extension line 17 of the inclined surface 7a and the horizontal line 18 drawn along the inclined surface 7a of the container body 1 intersect. Angle β between the extension line 19 of the surface drawn above and the horizontal line 18
Is slightly obtuse and the intersection 20 of the two extension lines 17 and 19 is located slightly above the stepped portion 10, and is formed between the inclined surface 7a and the outer peripheral surface 9 of the fitting projection 8. Intersection 2
The outer peripheral surface from 0 to the leading portion 21 of the fitting protrusion 8 and the slanted surface 7a to the step portion 10 can be slidably meshed with each other by utilizing the elasticity of the material. The natto container according to claim 1 or 2. 4. A flat bottom portion 2 of a container portion 22 of the container body 1.
3 and the inclined surface 7b below the stepped portion 10, the inclined surface 7b having the same inclination as that of the inclined surface 7 and one or both of the inclined surfaces 7b facing each other.
A corrugated (colgate) 24 for increasing the strength of the container is formed in the lower portion of the base and the bottom portion 23 so that no gap is formed between the peripheral edge of the film that can be covered on the natto and the inclined surface 7b. The natto container according to any one of claims 1, 2 and 3, characterized in that