WO2010146997A1 - Container with lid - Google Patents

Abstract

Provided is a container with a lid, capable of providing a high sealing efficiency when the lid is closed. An upper opening (21) of a container body (20) is provided with a container inner side wall portion (22) and a container side skirt portion (24) which extends downward from an upper end of the container inner side wall portion (22). The lid (10) is provided with a lid inner side wall portion (12) and a lid side skirt portion (14) which extends downward from an upper end of the lid inner side wall portion (12). The lid side skirt portion (14) is provided with two or more projections (15) which project inwardly. When the lid is closed, a sealed portion which is liquid-tight in the entire circumference direction is formed between the container inner side wall portion (22) and the lid inner side wall portion (12). First guide surfaces (30) are formed on the container side skirt portion (24) to guide the projections (15) in the downward direction when the lid (10) is attached. When the lid is closed, the projections (15) are caused to move downwardly, and consequently, the lid (10) is caused to move toward the container body (20). Thus, the sealed portion formed between the container inner side wall portion (22) and the lid inner side wall portion (12) is brought into a press-contact state to provide a high sealing efficiency.

Description

Container with lid

The present invention relates to a container with a lid.

Containers with lids molded from synthetic resins are manufactured and consumed in large quantities as supermarkets, convenience stores, etc. for storing lunch boxes, prepared dishes, preserved foods, and the like. Many of these lidded containers are manufactured considering only one use. However, some foods cannot be used at once (for example, plum dried, rakkyo, caviar, salmon roe, fruit, dried fruit, salad, etc.), and there is a desire to use a container with a lid multiple times.

In this case, what is important is the sealing performance of the lid. For this purpose, in a lidded container constituted by a container body having an upper opening and a lid that is detachably attached to the upper opening of the container body, when the lid is attached to the container body, A container with a lid in which a simple seal portion in the circumferential direction is formed between the peripheral edge portion and the upper opening of the container main body is described in Patent Document 1, Patent Document 2, and the like.

JP 2007-099288 A JP-A-8-295356

The lidded container of Patent Document 1 uses screw bonding, and a body-side screw step portion and a fitting portion are formed in a skirt portion on the container body side that is a sheet molded product, and the lid is also a sheet molded product. By forming a lid side screw step part and a fitting part of the same shape as the main body side screw step part in the skirt part formed at a position facing the skirt part of the container main body on the body side, The lid is detachably attached. Then, by screwing the screw step portion of the container body with the screw step portion of the lid body, and further engaging or fitting the fitting portion on the container body side and the fitting portion on the lid side, It is said that a seal part is formed and the sealing property can be secured. Furthermore, when the fitting portions are engaged with each other, the skirt portions of the container main body and the lid body come into close contact with each other, and higher sealing performance can be secured.

However, in Patent Document 1, the fitting portion on the container body side formed by sheet molding is formed on the outer skirt portion of the container body. Therefore, the lid fitting portion for engaging with the lid is also provided in the lid outer skirt portion. Thus, in the container main body and the lid formed by sheet molding, the outer skirt portion is weak in strength and easily deforms. Therefore, in the configuration in which the outer skirt portion is fitted, sufficient sealing performance cannot be exhibited. Further, even if screw step portions are provided on the outer skirt portion of the container body and the outer skirt portion of the lid body, and these screw step portions are engaged with each other, sufficient sealing cannot be obtained for the same reason as described above. Further, even when both the fitting portion and the screw step portion are combined, the container body formed by sheet molding and the outer skirt portion of the lid body are easily deformable parts, so that sufficient sealing is achieved. Sex cannot be obtained.

In addition, it is not easy to form a screw step portion of the same shape so that it can be screw-engaged with each other to the skirt portion of the container main body and the lid body formed by sheet molding. Also in this case, sufficient sealing performance cannot be obtained.

In the container with a lid of Patent Document 2, a projecting body for sealing is formed on the entire horizontal flange of either the container body or the lid, and the projecting body is fitted to the other when the lid is closed. It is characterized in that a groove for sealing is formed over the entire circumference. Furthermore, when removing a cover part from a container main-body part, this protrusion is guided upwards, and the protrusion-shaped body guide part for guide | inducing in the direction which removes a cover part is provided.

However, the container body and the lid cannot be strongly pressed only by the protrusions and grooves having the above structure, and high sealing performance cannot be ensured. Because the projecting body guide provided in the container described in Patent Document 2 can guide the projecting body upward and guide the projecting body in the direction of removing the lid, This is because the body cannot be pressed against the main body, and the force that presses the flange portion formed on the lid downward, that is, the force that presses the flange portion against the surface of the flange portion formed on the container main body does not act.

The present invention has been made in view of the above-described circumstances. For example, even a lidded container formed with a sheet is easy to mold, and has a sufficient sealing property when the lid is closed. An object of the present invention is to provide a lidded container that can be reliably secured and can be easily attached and detached.

In order to solve the above problems, the present inventors have conducted many experiments, and when the inner wall portion of the container body is pressed against the inner wall portion of the container body, the inner wall portion of the container body is deformed. It was difficult to obtain high sealing performance. Further, by forming a guide surface on the outer skirt of the container body and moving the protrusion formed on the lid along the guide surface, a high pressure contact state can be stably formed between the container body and the lid body. I found out. The present invention is based on the above findings.

That is, the container with a lid according to the present invention includes a container body having a circular upper opening, and a lid that is detachably attached to the upper opening of the container body, and the lid is attached to the container body. A lidded container in which a circumferential liquid-tight seal is formed between the peripheral edge of the lid and the upper opening of the container body, the upper opening of the container body being The container includes at least a container inner wall part continuous with the side wall and a container side skirt part extending downward from the upper end of the container inner wall part, and the peripheral part of the lid body has the lid body attached to the container body. And at least a lid inner wall portion having a region that can contact the inner wall portion of the container over the entire circumference, and a lid side skirt portion extending downward from the upper end of the lid inner wall portion, Further, the lid side skirt portion has Two or more protrusions projecting toward the side are formed, and the container-side skirt portion of the container body is provided with the protrusion 15 formed on the lid-side skirt portion downward when the cover body is attached. A first guide surface that can be guided toward the first side is formed. When the lid is closed, the projection is guided downward by the first guide surface, so that the lid is directed downward. Accordingly, the seal portion formed between the inner wall portion of the container and the inner wall portion of the lid is brought into a pressure contact state, and high sealing performance is ensured in the seal portion. .

In the above-mentioned container with a lid, when the lid is closed, the projection formed on the lid is guided downward by the first guide surface formed on the container-side skirt, so that the lid is directed downward. Be drawn. And the area | region which can contact | abut the above-mentioned container inner wall part in the lid inner wall part over the perimeter and the container inner wall part will be in the state which press-contacted mutually by the drawing-in. For this purpose, a circumferential liquid-tight seal portion having high sealing performance is formed between the container inner wall portion and the lid inner wall portion.

In addition, the operation of closing the lid is configured such that the protrusion formed on the lid is guided downward by the first guide surface formed on the container-side skirt, and thus the lid is simply rotated in the tightening direction. It is only necessary to move, and when the rotation is finished, the above-described circumferential liquid-tight seal portion having high sealing performance is formed.

Furthermore, in the container with a lid according to the present invention, the liquid-tight seal portion in the circumferential direction is formed not on the skirt portion but on the inner wall portion of the container continuous with the side wall of the container body as described above. The portion of the inner wall of the container that is continuous with the side wall of the container main body is a region that is less likely to be deformed by an external force than the skirt formed from the upper end of the container main body toward the lower outside, and has a lid. Later, breakage of the liquid-tight seal portion can be prevented with high probability.

There is no limitation on the specific mode for forming the circumferential liquid-tight seal portion, but as an example, the inner wall portion of the container and the inner wall surface of the lid are cylindrical surfaces or conical surfaces that expand upward. (A) The radius of the upper end of the inner wall of the lid is r1, the radius of the upper edge of the inner wall of the vessel is r3, the inclination angle of the inner wall of the vessel with respect to the vertical center line is θ1, and the inclination angle of the inner wall of the lid 12 , Where r1 ≧ r3 and 0 ° ≦ θ1 <θ2, (B) an embodiment where r1 ≦ r3 and θ1> θ2 ≧ 0 °, and (C) r1> r3 Thus, there is an embodiment in which θ1 = θ2 and not 0 °.

In one aspect of the container with a lid according to the present invention, the container includes a first flange portion extending in a horizontal direction at an upper end of the inner wall portion of the container, and a container-side skirt portion extends from an outer end thereof. A second flange portion extending in the horizontal direction is provided at the upper end of the inner wall portion of the lid, and the lid side skirt portion extends from the outer end thereof. In this aspect, by providing the first and second flange portions, the upper opening portion of the container body and the peripheral edge portion of the lid body can be made difficult to be deformed by an external force. It is possible to prevent the seal portion from being broken with a higher probability.

In the aspect including the flange portion, when the lid is closed by the first guide surface when the lid is closed, the first flange portion is drawn when the lid is drawn downward. And the second flange portion can be brought into a pressure contact state. When the two flange portions are in a pressure contact state, a liquid-tight seal portion in the circumferential direction is also formed in the region as the second seal portion, and a container with a lid with higher sealing performance is obtained.

In one aspect of the container with a lid according to the present invention, when the lid attached to the container body is removed from the container-side skirt, the protrusion is guided upward in a posture in which the lower edge side of the protrusion is in contact. The 2nd guide surface 40 which can be formed is formed. In this form, the operation for removing the lid is very easy. In addition, the second guide surface can be used as a guide surface on the lower edge side of the protrusion when the lid is closed, and the operation of closing the lid becomes easier.

Preferably, the second guide surface partially has a horizontal region substantially parallel to the upper end of the inner wall of the container, and the first guide surface does not exist at least above the horizontal region. To be. In this embodiment, the upper side of the horizontal region is open upward due to the absence of the first guide surface, and when the lid is closed, the lower edge side of the protruding portion is positioned above the horizontal region. Can be easily mounted. And a protrusion can be easily guided to the position of the said 1st guide surface by rotating a cover body in the clamping direction from the state.

In the lidded container according to the present invention, a plurality of longitudinal reinforcing ribs may be formed on the lid side skirt portion of the lid. In this embodiment, the strength of the lid side skirt portion of the lid can be increased, thereby preventing deformation of the lid and making it difficult to slide during the attachment / detachment operation of the lid.

In the lidded container according to the present invention, the container body and the lid are both sheet molded products from a synthetic resin sheet. As described above, in the container with a lid according to the present invention, the container side skirt portion on the container body side is provided with the first guide surface for guiding the protrusion formed on the lid body, and the container body and the lid body are both sheets. Even in the case of a shape that is easily deformed by an external force, such as a molded product, the lid fastening operation can be performed stably and reliably.

According to the present invention, high sealing performance can be imparted to a lidded container formed with a thin sheet of synthetic resin. Furthermore, it is possible to obtain a lidded container which can be easily and repeatedly attached and detached and which can be easily molded as compared with conventional containers.

FIG. 1 is a perspective view showing an embodiment of a container with a lid according to the present invention in a state where a container body and a lid are separated. FIG. 2 is a side view of FIG. FIG. 3 is a view showing a container with a lid in a state where a lid is placed. FIG. 4 is a cross-sectional view showing a main part of a lidded container according to the present invention. FIG. 5 is an enlarged view showing a main part of the lidded container shown in FIG. 1. FIG. 6: is an enlarged view which shows the principal part of the container with a lid | cover of the further another form by this invention.

Hereinafter, some embodiments of the present invention will be described with reference to the drawings. The lidded container 1 includes a lid body 10 and a container body 20 to which the lid body 10 is attached so as to cover the upper opening 21. Although not limited, in this example, the lid 10 and the container body 20 are sheet molded products obtained by thermoforming a thin 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. The peripheral edge portion 11 includes a lid inner wall portion 12 rising from the outer edge of the lid top surface portion 10a, an annular second flange portion 13 having a width a2 extending in the horizontal direction from the upper end of the lid inner wall portion 12, and a second It is comprised with the cover body side skirt part 14 extended toward the downward direction from the outer side end of the flange part 13. As shown in FIG. Further, in the vicinity of the lower end of the lid-side skirt portion 14, two or more (four in the illustrated example) projecting portions 15 are formed at an equal distance in the circumferential direction. Although not essential, the lid body side skirt portion 14 is also formed with a large number of ribs 16 in the vertical direction, and exhibits an effect of preventing slipping when the lid is attached and detached in addition to the reinforcing effect. In the illustrated example, the second flange portion 13 has a flat plate shape, but may have a non-flat shape such as an arc shape. Moreover, the 2nd flange part 13 is abbreviate | omitted and the cover body side skirt part 14 may be formed directly toward the downward direction from the upper end of the lid inner side wall part 12. FIG.

The container main body 20 has a bottomed cylindrical shape with a predetermined depth, and the upper opening described above is continuous with the upper edge of the container main body side wall 20a formed upward from the peripheral edge of the bottom surface of the container main body 20. 21 is provided. The upper opening 21 includes a container inner side wall 22 that is continuous with the upper edge of the container main body side wall 20a, and an annular first flange portion that has a width a1 (<a2) extending horizontally from the upper end of the container inner wall 22. 23 and a container-side skirt portion 24 extending downward from the outer end of the first flange portion 23. The container-side skirt portion 24 is formed with guide surfaces 30 and 40, which will be described later, for guiding the protrusion 15 formed on the lid 10. Preferably, the width (depth) toward the inside of the protrusion 15 formed on the lid 10 is the difference P between the width a2 of the second flange portion 13 and the width a1 of the first flange portion 23. Nearly equal or somewhat smaller.

In the illustrated example, the first flange portion 23 has a flat plate shape. However, when the second flange portion 13 has a non-flat plate shape such as an arc shape, When the second flange portion 13 is omitted, the container side skirt portion 24 is also formed directly downward from the upper end of the container inner wall portion 22 in the container body 20.

When the container is closed, the container inner wall portion 22 is a region where the lid inner wall portion 12 formed on the lid body 10 faces. The lid inner wall portion 12 has an area that can contact the inner wall portion 22 of the container over the entire circumference when the lid body 10 is attached to the container main body 20. A liquid-tight seal portion in the circumferential direction is formed between the wall portion 22 and the lid inner wall portion 12. With reference to FIG. 4, some of the specific modes in which the liquid-tight seal portion in the circumferential direction is formed will be described.

In the embodiment of FIG. 4A, the container inner wall portion 22 and the lid inner wall portion 12 are conical surfaces that expand upward, the upper end radius of the lid inner wall portion 12 is r1, and the lower end radius is r2. When the radius of the upper end of the container inner wall part 22 is r3, r1 ≧ r3> r2, and the inclination angle of the container inner wall part 22 with respect to the vertical center line O is θ1 and the lid inner wall part When the inclination angle of 12 is θ2, 0 ° <θ1 <θ2. In this aspect, when the lid is closed, the circular upper end of the container inner wall portion 22 comes into contact with the conical surface forming the lid inner wall portion 12 over the entire circumference. Part is formed.

FIG. 4B is different from that shown in FIG. 4A in that θ1 is 0 °, that is, the container inner wall portion 22 is a cylindrical surface. Also in this aspect, when the lid is closed, the circular upper end portion of the container inner wall portion 22 comes into contact with the conical surface forming the lid inner wall portion 12 over the entire circumference, and the circumferential seal is provided by the corresponding contact portion. Part is formed.

4C, θ2 is 0 °, that is, the lid inner wall portion 12 is a cylindrical surface, and therefore r1 = r2. r3 is greater than r1, and θ1 is greater than 0 °. In this embodiment, when the lid is closed, the lower end portion forming the cylindrical surface of the lid inner wall portion 12 comes into contact with the conical surface forming the container inner wall portion 22 over the entire circumference. A seal portion is formed. Although not shown, if the relationship of θ1> θ2 is satisfied, a similar seal portion is formed even if the lid inner wall portion 12 is a conical surface.

4D is an aspect in the case of r1> r3 and θ1 = θ2 ≠ 0 °. In this embodiment, when the lid is closed, the conical surface forming the container inner wall portion 22 and the conical surface forming the lid inner wall portion 12 are in surface contact with each other to form a circumferential seal portion. .

Next, the guide surfaces 30 and 40 will be described with reference to FIG. First, the first guide surface 30 will be described. The first guide surface 30 is a surface that protrudes radially outward from the container-side skirt portion 24, and has an inclined portion 35 that is inclined obliquely downward from the first flange portion 23 that is the upper end of the container-side skirt portion 24. ing. In this example, the lower end portion 26 of the inclined portion 35 forms a horizontal portion 32 projecting radially in a posture parallel to the first flange portion 23 that is the upper end surface of the container-side skirt portion 24.

The projecting amount of the first guide surface 30 to the outside in the radial direction is small at the portion 25 in contact with the first flange portion 23, gradually increases as it goes downward, and is maximum at the horizontal portion 32 which is the lower end portion 26. The amount of protrusion at the maximum portion is substantially equal to the difference P between the width a2 of the second flange portion 13 and the width a1 of the first flange portion 23 described above. Further, a rising wall 31 is formed to rise upward from the protruding outer edge of the inclined portion 35 and the horizontal portion 32 of the first guide surface 30.

The rising wall 31 extends concentrically with the container-side skirt portion 24 of the upper opening 21 beyond the horizontal portion 32 and further to the rear (leftward in the figure). As described above, the amount of protrusion at the horizontal portion 32 is substantially equal to the difference P between the width a2 of the second flange portion 13 and the width a1 of the first flange portion 23, so that the rising wall 31 has the concentric shape. The distance between the radial position of the extending portion 31a and the container inner wall portion 22 of the upper opening 21 of the container body 20 is substantially equal to the width a2 of the second flange portion 13 in the lid body 10. Therefore, when the lid is closed, the inner surface of the lid-side skirt portion 14 of the lid 10 and the portion 31a of the rising wall 31 extending in the concentric shape can be in a substantially contacted state. A portion 31a extending concentrically in the rising wall 31 constitutes a rising wall portion in the second guide surface 40 described later.

In the above, the distance h from the upper end portion of the horizontal portion 32 to the first flange portion 23 and the distance H (see FIG. 5) between the upper surface of the protrusion 15 and the second flange portion 13 in the lid body 10. The relationship is H <h, but this is not an essential configuration. As will be described later, when the lid body 10 is closed, the protrusion 15 is guided downward by the first guide surface 30, so that the lid body 10 is pulled downward, and the inner wall of the lid is pulled by the pull-in. The relationship between the distance H and the distance h is that the region of the portion 12 that can contact the inner wall portion 22 of the container over the entire circumference and the inner wall portion 22 of the container can be in pressure contact with each other. It may be arbitrary.

In addition, the number of the first guide surfaces 30 described above is the same as the number of the protrusions 15 formed on the lid body 10, that is, four in this example. Preferably, the length of the first guide surface 30 in the circumferential direction is about ８ of the circumference of the upper opening 21 of the container body 20.

In the vicinity of the end portion of the horizontal portion 32, ridges 33a and 33b that protrude slightly in the radial direction from the surface of the container-side skirt portion 24 are formed. As a result, a recess 34 is formed between the bumps 33a and 33b.

Next, the second guide surface 40 will be described. The second guide surface 40 is also a surface projecting radially outward from the container-side skirt portion 24, and as shown in the drawing, the front side in the circumferential direction with respect to the horizontal portion 32 of the first guide surface 30 (in the drawing). Right direction), and the lower edge level position of the recess 34 is gradually inclined upward from the starting point. The upper end of the second guide surface 40 is the upper end surface of the container-side skirt 24. A certain first flange portion 23 is reached. In this example, the second guide surface 40 includes a first inclined region 41, a horizontal region 42 that is parallel to the upper end surface of the container-side skirt portion 24, and a second inclined region 43 that follows the first region. Has been.

In the example shown in the drawing, the first inclined region 41 and the horizontal region 42 following the first inclined region 41 have a shape that is bent inward in the horizontal direction at an appropriate position of the concentrically extending portion 31a of the rising wall 31 described above, Further, a part of the horizontal region 42 and the second inclined region 43 have a shape obtained by bending an appropriate portion of the rising wall 31 in the horizontal direction. The first guide surface 30 does not exist above the horizontal region 42 and the second inclined region 43 in the second guide surface 40. The horizontal region 42 can be omitted, and the first inclined region 41 and the second inclined region 43 may be continuous. In that case, it is desirable to design so that the first guide surface 30 does not exist above the second inclined region 43.

Further, the distance between the first guide surface 30 and the second guide surface 40 in the region where the first guide surface 30 exists above the second guide surface 40 is the projection 15 formed on the lid 10. Is a distance that can be passed in a horizontal posture.

Next, the operation when attaching the lid 10 to the container body 20 will be described. The operation of covering is performed by placing the peripheral edge 12 of the lid 10 on the upper opening 21 of the container body 20 and pressing it slightly downward. Thereby, except when the four protrusions 15 of the lid 10 are in contact with the portion 25 (the protruding portion at the upper end of the first guide surface 30) of the first flange 23, the lid 10 is Then, the inner surface of the protrusion 15 sinks downward in a posture in contact with the container-side skirt portion 24 of the container body 20. If it is in contact, rotate slightly.

Due to the sinking of the lid body 10, the lower edge side of the protrusion 15 comes into contact with any position of the second guide surface 40. In this state, the lid 10 is rotated clockwise in the figure. In the process, the upper edge portion on the front side in the rotational direction of each protrusion 15 comes into contact with each first guide surface 30. Further, by continuing the rotation, each of the protrusions 15 passes through a concave groove formed by the first guide surface 30, the second guide surface 40, and the container-side skirt portion 24. The protrusions 15 are guided along the inclination of the first guide surface 30 and in contact with the first guide surface 30, and are gradually drawn downward. In other words, the entire lid 10 is drawn downward, that is, toward the container body 20 side. And each protrusion 15 gets over the said bulge 33 and enters the said hollow part 34, Then, the attachment operation of a lid | cover is complete | finished.

In the process in which the entire lid 10 is drawn toward the container body 20 side, the lid inner wall portion 12 is gradually brought into pressure contact with the container inner wall portion 22, and as a result, based on FIG. The above-described “circumferential seal portion” is in a pressurized state. As a result, a liquid-tight seal portion having a higher liquid-tightness is formed between the lid inner wall portion 12 and the container inner wall portion 22 as compared with a case where the lid is merely in contact. In the form shown in FIG. 4C, it is desirable that θ1 = θ2. However, since slight deformation occurs in both sides due to the pressure contact, even if θ1 and θ2 are slightly different, The purpose of the period can be achieved.

As described above, the container inner side wall portion 22 is a portion that is continuous with the upper edge of the container body side wall 20a of the container body 20, and is less likely to be deformed by an external force than the skirt portion. For this reason, even if external force from other directions is applied to the lidded container after closing the lid, there is a very low probability of creating a gap in the "circumferential seal part", and the internal liquid leaks high. Can be blocked with probability.

In the illustrated example, as described above, the distance h from the upper end portion of the horizontal portion 32 following the first guide surface 30 to the first flange portion 23, and the upper surface of the protrusion 15 in the lid body 10. Since the relationship between the distance H to the second flange portion 13 is H <h, when the lid attachment operation is finished, the lid body 10 has a relationship with respect to the first flange portion 23 of the container body 20. The 2nd flange part 13 will be in the state press-contacted as needed. Therefore, the airtightness between the container body 20 and the lid body 10 is further ensured.

In this example, the amount of the first guide surface 30 projecting outward in the radial direction is small at the portion 25 of the first flange portion 23 and gradually increases as it goes downward. The rising wall 31 is formed so as to follow it. Therefore, even when each projection 15 is placed on the portion 25 of the first flange portion 23, the projection 15 is dropped to the second guide surface 40 by slightly rotating the lid 10 in the front-rear direction. The lid can be attached more easily. The first guide surface 30 may be a surface slightly inclined upward in the radial direction, and the upper surface side of the protrusion 15 may be a surface inclined in the radial direction, thereby facilitating the tightening operation. Both the property and the ease of molding can be satisfied.

When removing the lid 20, the lid 10 is rotated counterclockwise. Each of the protrusions 15 of the lid body 10 rotates along the first guide surface 30, the second guide surface 40, and the container side skirt portion while the lower edge portion on the front side in the rotational direction moves along the second guide surface 40. 24, and moves out of the groove formed by 24. After detachment, the lid body 10 can be removed by lifting the lid body 10 at an appropriate position.

FIG. 6 is a view corresponding to FIG. 5 and showing another embodiment of the container with a lid according to the present invention. This embodiment is different from the above-described container 1 with a lid in that the second guide surface 40 is not provided. Moreover, in FIG. 6, 31b is a terminal part of the part 31a extended concentrically of the above-mentioned standing wall 31, and is provided in an appropriate position. Other configurations are the same as those of the lid-equipped container 1 of the first embodiment, and the same reference numerals are given to the same members.

Also in this aspect, when the lid body 10 is submerged to the required extent, the lid body 10 is rotated clockwise in the drawing, whereby each projection 15 has its upper edge on the front side in the rotational direction of each first guide. By being in contact with the surface 30, it is guided along the inclination of the first guide surface 30 and in contact with the first guide surface 30, and gradually drawn downward. Then, at the time when the lid mounting operation is completed as described above, the second flange portion 13 on the lid body 10 side is in a required pressure contact state with the first flange portion 23 of the container body 20, Airtightness between the container body 20 and the lid 10 is ensured.

Although not shown, the number of protrusions formed on the lid 10 is four in the figure, but the number is arbitrary as long as it is two or more. Naturally, the number of first guide surfaces 30 corresponding to the number of protrusions and, if necessary, the second guide surfaces 40 are formed on the container body 20. The protrusions are preferably arranged at equal intervals in the circumferential direction.

1 ... Container with lid,
10 ... lid,
10a ... lid top surface 11 ... peripheral edge of the lid,
12 ... the inner wall of the lid,
13 ... 2nd flange part,
14 ... the lid side skirt,
15 ... projection,
16 ... ribs,
20 ... the container body,
20a ... Container body side wall 21 ... Upper opening,
22 ... inner container wall part 23 ... first flange part,
24 ... the container side skirt,
26 ... the lower end of the first guide surface,
30. First guide surface,
31 ... Rising wall,
31a ... Concentrically extending portion of the rising wall,
32 ... Horizontal part,
33 ... Uplift,
34 ... depression,
40. Second guide surface,
41 ... 1st inclination area | region of a 2nd guide surface,
42 ... horizontal region of the second guide surface,
43 ... the second inclined area of the second guide surface,
r1 ... radius of the upper end of the inner wall of the lid,
r2 ... radius of the lower end of the inner wall of the lid,
r3: radius of the upper end of the inner wall of the container,
θ1 ... the inclination angle of the inner wall of the container with respect to the vertical center line,
θ2 is an inclination angle of the inner wall portion of the lid with respect to the vertical center line.

Claims (6)

A container body having a substantially circular upper opening, and a lid that is detachably attached to the upper opening of the container body. When the lid is attached to the container body, the peripheral edge of the lid and the container body A lidded container in which a liquid-tight seal portion in the circumferential direction is formed between the upper opening and
The upper opening of the container body includes at least a container inner wall part continuous with the side wall of the container body and a container side skirt part extending downward from the upper end of the container inner wall part,
When the lid is attached to the container main body, the peripheral edge of the lid is formed from an inner wall of the lid having a region that can contact the inner wall of the container over the entire circumference, and an upper end of the inner wall of the lid. At least a lid-side skirt portion extending downward, and the lid-side skirt portion is formed with two or more projections projecting inward,
The container side skirt portion of the container body is formed with a first guide surface capable of guiding the protrusion formed on the lid side skirt portion downward when attaching the lid,
When the lid is closed, the protrusion is guided downward by the first guide surface, whereby the lid is pulled downward, whereby the inner wall portion of the container and the inner wall portion of the lid A container with a lid, wherein the seal portion formed between the two is in pressure contact with the seal portion to ensure high sealing performance. The container with a lid according to claim 1, wherein the inner wall portion of the container and the inner wall portion of the lid are a cylindrical surface or a conical surface that expands upward, and a radius of an upper end of the inner wall portion of the lid is set. When r1, the radius of the upper end of the inner wall of the container is r3, the inclination angle of the inner wall of the container with respect to a vertical center line is θ1, and the inclination angle of the inner wall of the lid is θ2, r1 ≧ r3 is 0 It is either θ ≦ θ1 <θ2, or r1 ≦ r3 and θ1> θ2 ≧ 0 °, or r1> r3 and approximately θ1 = θ2 and not 0 °. A container with a lid. The container with a lid 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 an outer end thereof. A lidded container comprising a second flange portion extending in the horizontal direction at an upper end of the inner wall portion of the lid, and a lid-side skirt portion extending from an outer end thereof. The lidded container according to claim 3, wherein when the lid is closed, the protrusion is guided downward by the first guide surface, so that the lid is pulled downward, and the pull-in is performed. Thus, the container with a lid is characterized in that the first flange portion and the second flange portion are also in pressure contact. 2. The lidded container according to claim 1, wherein when the lid attached to the container body is removed from the container side skirt portion, the protrusion is directed upward in a posture in which the lower edge side of the protrusion is in contact. And a second guide surface that can be guided. 6. The lidded container according to claim 5, wherein the second guide surface has a horizontal region partially parallel to an upper end of the inner wall portion of the container, and at least above the horizontal region. Is a container with a lid, wherein the first guide surface does not exist.

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