TWI422515B - Covered container - Google Patents

Description

Covered container

The present invention relates to a covered container.

The lidded container formed by the synthetic resin has been mass-produced and consumed as a container for placing convenience, cooked food, and preserved food in supermarkets, convenience stores, and the like. Most of these covered containers are manufactured by considering only one use. However, since there are incomplete use (such as dried plum, wild clam, caviar, salted cod roe, fruit, dried fruit, salad, etc.) depending on the food, there is a desire to use a lidded container in plural times.

In this case, it is important that the lid is sealed. For this reason, Patent Document 1 and Patent Document 2 and the like disclose a container having a lid body having an upper opening and a lid that is detachably attached to an upper opening of the container body, and When the lid body is attached to the container body, a simple sealing portion in the circumferential direction is formed between the peripheral edge portion of the lid body and the upper opening portion of the container body.

Prior technical literature Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-099288

Patent Document 2: Japanese Laid-Open Patent Publication No. Hei 8-295356

In the case of the lid container of the patent document 1, the body part side spiral step part and the fitting part are formed by the skirt part of the sheet main body side of the sheet molded product, and the said container is the same as the cover body side of the sheet-forms. The skirt portion formed at the position opposite to the body skirt portion has a lid-side spiral step portion and a fitting portion having the same shape as the body-side spiral step portion, and the lid body is detachably attached to the container body. Further, by screwing the spiral step of the container body and the spiral step of the lid body, the fitting portion on the container body side and the fitting portion on the lid side are engaged or fitted, and can be A seal is formed to ensure hermeticity. Further, by fitting the fitting portion to each other, the skirt portions of the container body and the lid body are in close contact with each other, and the high airtightness can be further ensured.

However, in Patent Document 1, the fitting portion on the container main body side formed by sheet forming is formed on the outer side skirt portion of the container body. Therefore, the fitting portion for engaging the lid body is also provided on the outer skirt portion of the lid body. In the container body and the lid body formed by the sheet forming as described above, since the outer skirt portion is weak and easily deformed, the outer skirt portion is fitted to each other, and sufficient sealing property cannot be exhibited. Further, in the case where the outer skirt portion of the container body and the skirt portion on the outer side of the lid body are provided with the spiral step portions, even if the spiral step portions are engaged with each other, sufficient sealing property cannot be obtained for the same reason as described above. Further, even if both the fitting portion and the spiral step portion are combined, the container body formed by the sheet forming and the skirt portion on the outer side of the lid body are easily deformed, so that sufficient sealing property cannot be obtained.

Further, it is not easy to form the spiral step of the same shape so that the container body and the cover body formed by the sheet forming can be screwed to each other. If the shape cannot be formed into the same shape, the case cannot be sufficiently sealed. Sex.

The lidded container of the patent document 2 is characterized in that the horizontal flange portion of either one of the container main body portion or the lid portion is formed with a closed protruding body over the entire circumference, and the other is formed when the other end is formed with a closed lid. A groove for sealing the projection. Further, the protrusion body guiding portion for guiding the protruding body upward when the cover portion is removed from the container body portion and inducing the lid portion in the removal direction is provided.

However, the projection body and the groove of the above-described structure cannot strongly press the container body and the lid portion, and high airtightness cannot be ensured. This is because the projection guiding portion of the container described in Patent Document 2 can induce the projection in the removal direction even when the projection is guided upward, but the lid cannot be crimped when the lid is closed. The configuration of the container body is such that the flange portion formed on the lid body is pressed downward, that is, the force at which the flange portion is pressed against the surface of the flange portion of the container body does not act.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a container having a lid, for example, even if it is a lidded container in which a sheet is formed, in addition to being easily formed, it is easy and sure to ensure sufficient sealing property when the lid is closed, and Easy to handle the buckle.

In order to solve the above problems, the inventors of the present invention have found that when a part of the lid body is crimped to the inner side wall portion of the container body, the inner side wall portion of the container body is not easily deformed, so that high can be obtained. Sealing. Further, it is known that the side surface of the container body forms a guide surface, and the projection formed on the lid body moves along the guide surface, whereby a high pressure connection state can be stably formed between the container body and the lid body. The present invention is based on the above-mentioned insights.

In other words, the container according to the present invention includes a container body having a circular upper opening portion and a lid body that is detachably attached to the upper opening portion of the container body, and the lid body is attached to the container body. Forming a circumferential liquid-tight sealing portion between the peripheral portion of the lid body and the upper opening portion of the container body; the upper opening portion of the container body at least includes: a container inner side wall portion continuous with the side wall of the container body, and the container a container side skirt portion having an upper end portion of the inner side wall portion extending downward; and a peripheral portion of the lid body having at least a lid inner side wall portion which is connectable to the entire circumference of the inner wall portion of the container when the lid body is attached to the container body And a cover side skirt extending downward from an upper end of the inner side wall portion of the cover; further, two or more protrusions protruding inward are formed on the cover side skirt portion; and the container of the container body The side skirt portion is formed with a first guiding surface that can guide the protrusion formed on the lid side skirt portion downward when the lid body is attached, and the first guiding surface when the lid body is closed The protrusion is guided downward, and the lid body is pulled downward, whereby the sealing portion formed between the inner wall portion of the container and the inner wall portion of the lid is crimped to ensure a high seal of the sealing portion. Sex.

In the above-described lidded container, the protrusion formed on the lid body when the lid is closed is guided downward by the first guide surface formed on the container side skirt portion, and the lid body is pulled downward. Further, by pulling it, the inner side wall portion of the lid can be in a state of being pressed against the inner side wall portion of the inner side wall portion of the container. Therefore, a liquid-tight sealing portion having a circumferential direction having high sealing property is formed between the inner wall portion of the container and the inner wall portion of the lid.

Further, since the operation of closing the lid is configured such that the projection formed on the lid body is guided downward by the first guide surface formed on the side skirt portion of the container, the lid body can be rotated only in the fastening direction, and the rotation is completed. In this case, the liquid-tight sealing portion having the circumferential direction with high sealing property is formed.

Further, in the lidded container of the present invention, the liquid-tight sealing portion in the circumferential direction is formed not in the skirt but in the inner wall portion of the container which is continuous with the side wall of the container body. The portion of the inner wall portion of the container continuous to the side wall of the container body is smaller than the skirt portion formed from the upper end of the container body toward the outer side, and is not easily deformed by external force, and can block the liquid at a high probability after closing the lid. The seal is a breaker.

The specific aspect of the liquid-tight sealing portion for forming the circumferential direction is not limited, and examples thereof include a cylindrical surface of the inner side wall portion of the container and a inner side wall portion of the lid, or a conical surface extending upward, wherein (A) a cover is provided. The radius of the upper end of the inner side wall portion is r1, the radius of the upper end portion of the inner side wall portion of the container is r3, the inclination angle of the inner side wall portion of the container with respect to the vertical center line is θ1, and the inclination angle of the inner side wall portion 12 of the cover is θ2, R1≧r3 and 0°≦θ1<θ2, or (B)r1≦r3 and θ1>θ2≧0°, or (C)r1>r3 and roughly θ1=θ2 and not 0° The situation and so on.

In one aspect of the lidded container of the present invention, the first flange portion extending in the horizontal direction is provided at the upper end of the inner wall portion of the container, and the container side skirt portion extends from the outer end portion thereof; The upper end has a second flange portion extending in the horizontal direction, and a cover side skirt portion extends from the outer end. In this aspect, by providing the first and second flange portions, the upper opening portion of the container body and the peripheral portion of the lid body can be prevented from being deformed by an external force, and the above-mentioned one can be prevented with a higher probability. The liquid-tight seal produces a destroyer.

In the aspect of the flange portion described above, when the lid body is closed, the protrusion is guided downward by the first guide surface, and when the lid body is pulled downward, the first flange portion and the second flange may be used. The state of the crimping. The two flange portions are in a state of being pressure-bonded, and a liquid-tight sealing portion as a circumferential direction of the second sealing portion can be formed in the region, and a lidded container having a higher sealing property can be obtained.

In one aspect of the lidded container of the present invention, when the lid body attached to the container body is removed from the container side skirt portion, the second portion of the projection portion can be guided upwardly to the lower edge side of the projection portion. Guide surface 40. In this form, the operation when the cover is removed becomes extremely easy. Further, when the lid is closed, the second guide surface can be used as a guide surface on the lower edge side of the projection, and the operation of closing the lid can be made easier.

Preferably, the second guiding surface has a horizontal portion substantially parallel to the upper end of the inner wall portion of the container, and the first guiding surface is not present at least above the horizontal portion. In this aspect, the first guide surface is not present above the horizontal region, and is opened upward. When the lid is closed, the lower edge side of the projection can be easily mounted on the horizontal region. Further, by rotating the lid body in the fastening direction from the state, the projection can be easily guided to the position of the first guide surface.

In the lidded container of the present invention, a plurality of longitudinal reinforcing ribs may be formed on the side skirt portion of the cover body. In this form, the strength of the cover side skirt portion of the lid body can be increased, whereby the deformation of the lid body can be prevented, and the lid body can be prevented from slipping during the buckle-off operation.

The lidded container of the present invention is a sheet molded article in which both the container body and the lid are formed of a synthetic resin sheet. As described above, in the lidded container of the present invention, the container-side skirt portion on the container body side is provided with the first guide surface for guiding the projection formed on the lid body, and the container body and the lid body are both formed as a sheet molded article. The outer force is easily deformed, and the lid snapping operation can be performed stably and surely.

According to the present invention, the lidded container of the thin-walled sheet of the formed synthetic resin can be imparted with high airtightness. Further, the reverse buckle operation can be easily performed, and a lidded container which is easy to form can be obtained as compared with the prior container.

Hereinafter, some embodiments of the present invention will be described with reference to the drawings. The lidded container 1 is configured by a lid body 10 and a container body 20 to which the lid body 10 is attached so as to cover the upper opening portion 21. Although not limited, in this example, the lid body 10 and the container body 20 are formed by thermoforming a thin-walled synthetic resin sheet having a thickness of about 0.2 to 1.0 mm.

In this embodiment, the lid body 10 is circular or substantially circular, and includes a lid top surface portion 10a and a peripheral edge portion 11 continuous with the lid top surface portion 10a. Further, the peripheral edge portion 11 is an annular inner flange portion 12 that rises from the outer edge of the lid top surface portion 10a, and an annular second flange portion 13 that has a width a2 extending from the upper end of the lid inner side wall portion 12 in the horizontal direction, and The cover side skirt portion 14 extending downward from the outer side end of the second flange portion 13 is formed. Further, in the vicinity of the lower end of the lid side skirt portion 14, the projections 15 which are equally spaced apart in the circumferential direction and which protrude from the inside (four in the illustrated example) are formed at the same distance. Although it is not essential, a plurality of ribs 16 are formed in the longitudinal direction of the cover side skirt portion 14 in addition to the reinforcing effect, and the effect of preventing slipping when the cover is buckled can be exerted. Further, in the figure, the second flange portion 13 is formed in a flat plate shape, but may be in the form of an arc-shaped non-flat plate. Moreover, the second flange portion 13 may be omitted, and the lid side skirt portion 14 may be formed directly downward from the upper end of the lid inner side wall portion 12.

The container body 20 has a bottomed cylindrical shape having a specific depth, and includes the above-described upper opening portion 21 so as to continuously extend from the upper edge of the container body side wall 20a formed upward from the peripheral edge of the bottom surface of the container body 20. The upper opening portion 21 has an inner circumferential side wall portion 22 continuous with the upper edge of the container body side wall 20a, and an annular first flange portion 23 having a width a1 (<a2) extending from the upper end of the container inner side wall portion 22 in the horizontal direction. And a container side skirt portion 24 that extends downward from the outer side end of the first flange portion 23. Further, the container side skirt portion 24 is formed with guide surfaces 30, 40 and the like for guiding the subsequent formation of the protrusion 15 formed in the lid body 10. Further, it is preferable that the difference between the width (depth) of the inside of the protrusion 15 formed on the lid body 10 and the width a2 of the second flange portion 13 and the width a1 of the first flange portion 23 P is roughly the same or slightly smaller.

Further, in the above-described example, the first flange portion 23 is formed in a flat plate shape. However, in the case where the second flange portion 13 is in the form of an arc-shaped non-flat plate, the shape is corresponding to the shape of the second flange portion 13 In the case where the second flange portion 13 is omitted, the container body 20 also forms the container side skirt portion 24 directly downward from the upper end of the inner wall portion 22 of the container.

The container inner wall portion 22 is formed in a region where the cover inner side wall portion 12 of the lid body 10 faces when the lid is closed. Further, the inner wall portion 12 of the lid has a region that can abut against the entire circumference of the inner wall portion 22 of the container when the lid body 10 is attached to the container body 20, thereby forming a space between the inner wall portion 22 of the container and the inner wall portion 12 of the lid. The liquid tight seal of the circumferential direction. Referring to Fig. 4, a number of specific aspects of forming the liquid-tight sealing portion in the circumferential direction will be described.

In the aspect of Fig. 4(a), the inner wall portion 22 and the inner wall portion 12 of the lid are conical surfaces that expand upward, so that the radius of the upper end of the inner wall portion 12 of the lid is r1, and the radius of the lower end is r2. When the radius of the upper end of the side wall portion 22 is r3, r1≧r3>r2, and the inclination angle of the inner wall portion 22 of the container with respect to the vertical center line O is θ1 and the inclination angle of the inner wall portion 12 of the cover is θ2. , is 0° < θ1 < θ2. In this aspect, when the lid is closed, the circular upper end portion of the inner wall portion 22 of the container abuts against the entire circumference of the conical surface forming the inner wall portion 12 of the lid, and the abutting portion forms a circumferential sealing portion.

Fig. 4(b) shows that θ1 is 0°, that is, the point at which the inner wall portion 22 of the container is a cylindrical surface is different from that shown in Fig. 4(a). In this aspect, when the lid is closed, the circular upper end portion of the inner wall portion 22 of the container abuts against the entire circumference of the conical surface forming the inner wall portion 12 of the lid, and the abutting portion forms a circumferential sealing portion.

In the aspect of Fig. 4(c), θ2 is 0°, that is, the inner wall portion 12 of the cover is a cylindrical surface, so that r1 = r2. R3 is larger than r1, and θ1 is larger than 0°. In this aspect, when the lid is closed, the cylindrical lower end portion of the lid inner side wall portion 12 abuts against the entire conical surface forming the container inner side wall portion 22, and the abutting portion forms a circumferential sealing portion. Further, although not shown, if the relationship between θ1 and θ2 is satisfied, even if the inner wall portion 12 of the lid has a conical surface, the same sealing portion can be formed.

The aspect of Fig. 4(d) is a case where r1>r3 and θ1=θ2≠0°. In this aspect, the conical surface forming the inner wall portion 22 of the container when the lid is closed is brought into surface contact with the conical surface forming the inner wall portion 12 of the lid to form a circumferential sealing portion.

Next, referring to Fig. 5, the above-described guide faces 30, 40 and the like will be described. First, the first guiding surface 30 will be described. The first guide surface 30 protrudes from the container-side skirt portion 24 on the radially outer surface, and has an inclined portion 35 that is inclined downward from the first flange portion 23 at the upper end of the container-side skirt portion 24. Further, in this example, the lower end portion 26 of the inclined portion 35 is formed with a horizontal portion 32 that protrudes in the radial direction in a posture parallel to the first flange portion 23 of the upper end surface of the container-side skirt portion 24.

The amount of protrusion of the first guide surface 30 toward the radially outer side is smaller than the portion 25 of the first flange portion 23, and gradually increases toward the lower side, and the horizontal portion 32 of the lower end portion 26 is the largest. The amount of protrusion of the largest portion is substantially the same as the difference P between the width a2 of the second flange portion 13 and the width a1 of the first flange portion 23. Further, a rising wall 31 rising upward is formed from the protruding outer edge of the inclined portion 35 and the horizontal portion 32 of the first guiding surface 30.

The rising wall 31 and the container side skirt portion 24 of the upper opening portion 21 extend concentrically beyond the horizontal portion 32 and further to the rear (left side in the drawing). As described above, since the difference P between the amount of protrusion of the horizontal portion 32 and the width a2 of the second flange portion 13 and the width a1 of the first flange portion 23 is almost the same, the aforementioned concentric circles of the rising wall 31 are formed. The distance between the radially extending portion 31a and the container inner side wall portion 22 of the upper opening portion 21 of the container body 20 is substantially the same as the width a2 of the second flange portion 13 of the lid body 10. Therefore, when the lid is closed, the inner surface of the lid side skirt portion 14 of the lid body 10 and the aforementioned concentrically extending portion 31a of the rising wall 31 can be brought into a substantially contact state. Further, the concentrically extending portion 31a of the rising wall 31 constitutes a rising wall portion of the second guiding surface 40 to be described later.

In the above, the distance h from the upper end portion of the horizontal portion 32 to the first flange portion 23 is the distance H from the upper surface of the protrusion portion 15 of the lid body 10 to the second flange portion 13 (see FIG. 5). The relationship is H < h, but these are not necessary components. As will be described later, when the lid body 10 is closed, the protrusion 15 is guided downward by the first guide surface 30, whereby the lid body 10 is pulled downward, and the inner side wall portion 12 of the lid can be connected to the inside of the container by pulling it. The region where the side wall portion 22 abuts on the entire circumference and the inner wall portion 22 of the container may be in a state of being pressed against each other, and the relationship between the distance H and the distance h may be arbitrary.

Further, the number of the first guide faces 30 described above and the projections 15 formed in the lid body 10 are the same, and four are formed in this example. It is preferable that the length of the first guide surface 30 in the circumferential direction is about 1/8 of the circumference of the upper opening portion 21 of the container body 20.

In the vicinity of the end portion of the horizontal portion 32, ridges 33a and 33b which are slightly bulged in the radial direction from the surface of the container-side skirt portion 24 are formed. Thereby, the depressed portion 34 is formed between the aforementioned ridges 33a and 33b.

Next, the second guiding surface 40 will be described. The second guide surface 40 is also a surface that protrudes outward in the radial direction from the container side skirt portion 24, and is horizontally closer to the horizontal portion 32 than the first guide surface 30 (right side in the drawing) as shown in the drawing. The lower edge position of the recessed portion 34 is gradually formed obliquely upward as a starting point, and the upper end of the second guiding surface 40 reaches the first flange portion 23 to the upper end surface of the container side skirt portion 24. In this example, the second guiding surface 40 is composed of a first inclined region 41, a horizontal region 42 of the continuous first inclined region 41 which is parallel to the upper end surface of the container-side skirt portion 24, and a second inclined region of the continuous horizontal region 42. 43 constitutes.

In the illustrated example, the first inclined region 41 and the continuous horizontal region 42 have a shape in which the appropriate position of the concentrically extending portion 31a of the rising wall 31 is bent inward in the horizontal direction, and One of the horizontal regions 42 and the second inclined region 43 have a shape in which the appropriate positions of the above-mentioned rising walls 31 are bent in the horizontal direction. Further, the first guiding surface 30 is not present above the horizontal region 42 and the second inclined region 43 of the second guiding surface 40. Further, the horizontal region 42 may be omitted, and the first inclined region 41 and the second inclined region 43 may have a continuous shape. In this case, it is preferable that the first guide surface 30 is not present above the second inclined region 43.

Further, the distance between the first guiding surface 30 and the second guiding surface 40 in the region of the first guiding surface 30 above the second guiding surface 40 is such that the projection 15 formed in the lid body 10 can pass in a horizontal posture. The distance.

Next, an operation when the lid body 10 is attached to the container body 20 will be described. The operation of closing the lid is first formed on the upper opening portion 21 of the container body 20, covers the state of the peripheral edge portion 12 of the lid body 10, and is slightly pressed downward. Thereby, the cover body 10 is protruded except when the four projections 15 of the lid body 10 abut against the aforementioned portion 25 of the first flange portion 23 (the protruding portion at the upper end of the first guide surface 30). The inner side of the portion 15 is attached to the container-side skirt portion 24 of the container body 20 so as to settle downward. In the case of abutment, make it slightly rotate.

By the sinking of the lid body 10, the lower edge side of the projection 15 abuts on any position of the second guide surface 40. In this state, the cover 10 is rotated in the clockwise direction in the drawing. In the process, the upper edge portion on the front side in the rotation direction of each of the projections 15 is in contact with each of the first guide faces 30. Further, by continuing the rotation, the protrusions 15 pass through the grooves formed by the first guiding surface 30, the second guiding surface 40, and the container side skirt portion 24, and in the process, the projections 15 follow the The guide surface 30 is inclined, and is in contact with the first guide surface 30 and guided while being gradually pulled downward. In other words, the entire body 10 is pulled downward, that is, toward the container body 20 side. Further, each of the projections 15 passes over the aforementioned ridges 33 and enters the recessed portion 34, thereby completing the mounting operation of the cover.

In the process in which the entire cover 10 is pulled toward the container body 20 side, The inner wall portion 12 of the lid is gradually pressed against the inner wall portion 22 of the container. As a result, the "circumferential sealing portion" described above with reference to Fig. 4 is pressurized. Thereby, a liquid-tight seal portion having a higher liquid-tightness is formed between the inner wall portion 12 of the lid and the inner wall portion 22 of the container as compared with the case of simply abutting. Further, in the form shown in Fig. 4(d), θ1 = θ2 is preferable, but the two sides are slightly deformed by being pressed, whereby the conical surface of the inner side wall portion 22 of the container is formed and the inner side wall of the cover is formed. Since the conical surface of the portion 12 is in contact with each other to form a circumferential sealing portion, even if θ1 and θ2 are slightly different, a desired object can be achieved.

As described above, the inner wall portion 22 of the container is continuous over the upper edge of the side wall 20a of the container body 20, and is less likely to be deformed by an external force than the skirt. Therefore, after the lid is closed, even if an external force is applied from the other direction to the lidded container, the probability of creating a gap in the "circumferential sealing portion" is extremely low, and the internal liquid can be prevented from leaking out at a high probability.

In the illustrated example, as described above, the distance from the upper end portion of the horizontal portion 32 of the first guide surface 30 to the first flange portion 23 is the same as the protrusion 15 of the cover body 10. Since the relationship H of the distance H from the upper surface to the second flange portion 13 is H < h, the second flange portion 13 of the lid body 10 is the first flange portion 23 of the container body 20 when the lid mounting operation is completed. Need to be crimped. Therefore, the airtightness of the container body 20 and the lid body 10 can be further ensured well.

In this example, the amount of protrusion of the first guide surface 30 in the radial outer side is smaller than the portion 25 of the first flange portion 23, and gradually increases as it goes downward. Further, the aforementioned rising wall 31 is formed along the same. Therefore, even if each protrusion 15 is mounted In the case of the portion 25 of the first flange portion 23, only the lid body 10 is slightly rotated in the front-rear direction, and the projection portion 15 can be dropped into the second guide surface 40, thereby facilitating the attachment operation of the lid. The first guide surface 30 is formed to be slightly inclined upward in the radial direction, and the upper surface side of the projection 15 may be formed to be inclined in the radial direction, thereby making it easy to perform the fastening operation. Both sex and ease of formation.

When the cover 20 is removed, the cover 10 is rotated counterclockwise. With the rotation, the projections 15 of the lid body 10 move along the second guide surface 40 while the lower edge portion on the front side in the direction of the rotation moves on the first guide surface 30 and the second guide surface 40 and the side skirt of the container. The groove formed by the portion 24 is detached therefrom. After the detachment, the cover 10 is lifted at a suitable position, whereby the cover 10 can be removed.

Fig. 6 is a view showing another embodiment of the lidded container of the present invention, which corresponds to Fig. 5; This aspect is different from the lidded container 1 of the first aspect described above in that the second guide surface 40 is not provided. Further, in Fig. 6, 31b is a terminal portion of the concentrically extending portion 31a of the above-mentioned rising wall 31, and is provided at an appropriate position. The other configurations are the same as those of the lidded container 1 of the first embodiment, and the same members are denoted by the same reference numerals.

Even in this state, the lid body 10 can be rotated in the clockwise direction in the state in which the lid body 10 is required to be sunk, so that the upper edge portion of the front side of the respective projections 15 in the rotation direction is connected to the upper edge portion. Each of the first guide surfaces 30 is inclined along the first guide surface 30, and is guided while being in contact with the first guide surface 30, and is gradually pulled downward. As described above, when the lid attachment operation is completed, the second flange portion 13 on the lid body 10 side is pressed against the first flange portion 23 of the container body 20, and the container body 20 is secured. Closed with the cover 10, Although not shown in the drawings, the projections formed in the lid body 10 are four in the drawing, but if they are two or more, the number may be arbitrary. Of course, the container body 20 is formed with the first guide surface 30 corresponding to the number of projections and, if necessary, the second guide surface 40. It is preferable that the projections are arranged at equal intervals in the circumferential direction.

1‧‧‧ covered containers

10‧‧‧ cover

10a‧‧‧Top face

11‧‧‧The peripheral part of the cover

12‧‧‧ inside the cover

13‧‧‧2nd flange

14‧‧‧ Cover side skirt

15‧‧‧ protrusion

16‧‧‧ Ribs

20‧‧‧ container body

20a‧‧‧Container body side wall

twenty one. . . Upper opening

twenty two. . . Inside wall of container

twenty three. . . First flange

twenty four. . . Container side skirt

26. . . Lower end of the first guiding surface

30. . . First guiding surface

31. . . Stand up

31a. . . a portion of the concentric circle extending from the wall

32. . . Horizontal department

33. . . Uplift

34. . . Depression

40. . . Second guiding surface

41. . . The first inclined area of the second guiding surface

42. . . Horizontal area of the second guiding surface

43. . . Second inclined area of the second guiding surface

R1. . . Radius of the upper end of the inner side wall of the cover

R2. . . Radius of the lower end of the inner side wall of the cover

R3. . . Radius of the upper end of the inner side wall of the container

Θ1. . . Inclination angle of the inner side wall portion of the container with respect to the vertical center line

Θ2. . . The angle of inclination of the inner side wall portion of the cover relative to the vertical center line

Fig. 1 is a perspective view showing a state in which a container of the present invention is separated by a container body and a lid; Fig. 2 is a side view of Fig. 1; and Fig. 3 is a view showing a lidded container in a state in which a lid is fastened; 4(a)-(d) are cross-sectional views showing essential parts of the covered container of the present invention; Fig. 5 is an enlarged view showing the essential part of the covered container shown in Fig. 1; and Fig. 6 is a view showing further parts of the present invention. An enlarged view of a main part of a covered container of another form.

10. . . Cover

13. . . Second flange

14. . . Cover side skirt

15. . . Projection

16. . . rib

20. . . Container body

twenty one. . . Upper opening

twenty three. . . First flange

twenty four. . . Container side skirt

25. . . Part of the first flange portion

26. . . Lower end of the first guiding surface

30. . . First guiding surface

31. . . Stand up

31a. . . a portion of the concentric circle extending from the wall

32. . . Horizontal department

33a, 33b. . . Uplift

34. . . Depression

35. . . Inclined portion

40. . . Second guiding surface

41. . . The first inclined area of the second guiding surface

42. . . Horizontal area of the second guiding surface

43. . . Second inclined area of the second guiding surface

Claims (6)

A container having a lid, comprising: a container body having a substantially circular upper opening portion; and a lid body detachably attached to the upper opening portion of the container body, wherein the lid body is attached to the container body Forming a circumferential liquid-tight sealing portion between the peripheral portion of the lid body and the upper opening portion of the container body; the upper opening portion of the container body having at least a container inner side wall portion continuous to the side wall of the container body, and the container a container side skirt portion having an upper end portion of the inner side wall portion extending downward; and a peripheral portion of the lid body having at least a lid inner side wall portion which is connectable to the entire circumference of the inner wall portion of the container when the lid body is attached to the container body And a cover side skirt extending downward from an upper end of the inner side wall portion of the cover; and two or more protrusions protruding inwardly on the cover side skirt portion; and the container side skirt of the container body The first guide surface that guides the protrusion formed on the cover side skirt portion downward can be formed when the cover body is attached, and the first guide surface is used when the cover body is closed. The protrusion is guided downward, and the lid body is pulled downward, so that the sealing portion formed between the inner wall portion of the container and the inner wall portion of the lid is crimped to ensure high sealing of the sealing portion. The lidded container is a sheet-formed product obtained by thermoforming a thin-walled synthetic resin sheet having a thickness of 0.2 to 1.0 mm; the first guiding surface has a slope from an upper end of the side skirt side of the container The inclined portion and the horizontal portion. The lidded container of claim 1, wherein the inner side wall portion of the container and the inner side wall portion of the lid are a cylindrical surface or a conical surface that expands upward, and the radius of the upper end of the inner side wall portion of the lid is r1, and the inner side wall portion of the container The radius of the upper end is r3, the inclination angle of the inner side wall portion of the container with respect to the vertical center line is θ1, and the inclination angle of the inner side wall portion of the cover is θ2, r1≧r3 and 0°≦θ1<θ2, or r1≦ R3 and θ1>θ2≧0°, or r1>r3 and approximately θ1=θ2 and not any of 0°. A lidded container according to claim 1, wherein a first flange portion extending in a horizontal direction is provided at an upper end of the inner wall portion of the container, and a container side skirt portion extends from the outer end portion thereof, and the upper end portion of the inner wall portion of the lid is provided The second flange portion extending in the horizontal direction has a lid side skirt extending from the outer end. The lidded container according to claim 3, wherein the lid is guided downward by the first guide surface when the lid is closed, thereby pulling the lid downward, and the first flange portion and the second portion are pulled by the pulling The flange portion also becomes in a state of being crimped. The lidded container according to claim 1, wherein the container side skirt portion is formed with a cover member that is attached to the container body when the lid body is attached to the container body, and is capable of guiding the protrusion portion upward in a posture contacting the lower edge side of the protrusion portion 2 guiding surfaces. The lidded container according to claim 5, wherein the second guiding surface has a horizontal portion substantially parallel to an upper end of the inner wall portion of the container, and the first guiding surface is not present at least above the horizontal portion.