JP2021084661A - Resin made container - Google Patents

Abstract

To Provide is a resin made container capable of suppressing impaired screwing feeling.SOLUTION: The resin made container includes a container body having a cylindrical opening and a screw type outer lid having an inner peripheral surface that is screwed with the outer peripheral surface of the opening. The outer peripheral surface of the container body is provided with a first protrusion group 31 consisting of a first front protrusion 32 protruding toward the screw type outer lid and a first rear protrusion 33. The inner peripheral surface of the screw type outer lid is provided with a lid side protrusion 58 protruding toward the outer peripheral surface of the container body. The first front stage protrusion 32 and the first rear stage protrusion 33 are arranged in the circumferential direction of the container body so that the distance between the first protrusion group 31 and the lid side protrusion 58 becomes smaller in a screwing direction RD. The lid side protrusion 58 is configured to pass through the first protrusion group 31 before the completion of screwing, and to come into contact with the first front stage protrusion 32 or the first rear stage protrusion 33 to get over the protrusion.SELECTED DRAWING: Figure 5

Description

The present invention relates to a resin container that closes the container body by screwing the container body and the outer lid.

In a resin container in which a container body and an outer lid are screwed together, a resin container in which the container body has two engaging portions and the outer lid has one engaged portion is known (for example, a patent). See Document 1). In such a resin container, the outer lid rotates with respect to the container body in the screwing direction, so that the engaged portion enters between the two engaging portions, whereby the outer lid and the container body are screwed together. Complete.

Japanese Unexamined Patent Publication No. 2013-199296

In this way, when moving the outer lid in the screwing direction, the engaged portion is inserted between the engaging portion in the front stage and the engaging portion in the rear stage, and the outer lid and the container body are screwed together. Complete. When the engaged portion gets over the engaging portion in the previous stage, it provides the user with a feeling of screwing due to sound, vibration, or the like. The user who is provided with the feeling of screwing recognizes that the container body and the outer lid are properly screwed. In order to provide such a feeling of screwing, the screwing gap, which is the distance between the outer peripheral surface of the container body and the inner peripheral surface of the outer lid, is required to have a size such that the engaged portion gets over the engaging portion in the previous stage. ..

On the other hand, in a resin container in which the contents are heated by a microwave oven, heat shrinkage occurs each time the contents are heated, and heat shrinkage accumulates due to repeated heating. For example, when only the container body is heated, or when the shrinkage amount differs between the container body and the outer lid, such as when only the lid body is heated, in the closed resin container, Changes occur in the screw gap. Then, the increase in the screwing gap or the reduction in the screwing gap makes it impossible to overcome the above-mentioned problem and lowers the feeling of screwing.

An object of the present invention is to provide a resin container capable of suppressing a decrease in the feeling of screwing.

A resin container that solves the above problems includes a container body having a tubular opening and a screw-type outer lid having an inner peripheral surface that is screwed with the outer peripheral surface of the opening. Either one of the outer peripheral surface and the inner peripheral surface is the first part. Of the outer peripheral surface and the inner peripheral surface, the portion other than the first portion is the second portion. The first part includes a plurality of first protrusions protruding toward the second part, and the second part includes a second protrusion protruding toward the first part. The direction in which the second protrusion advances when the screw type outer lid is screwed is the screwing direction. The plurality of first protrusions are arranged in the circumferential direction of the first part so that the distance between each of the first protrusions and the second part becomes smaller in the screwing direction. The second protrusion is configured to pass through the plurality of first protrusions before the completion of the screwing, come into contact with at least one of the first protrusions, and get over the first protrusion.

According to the above configuration, when the heat shrinkage amount of the container body is larger than the heat shrinkage amount of the screw type outer lid, the distance between the first part and the second part becomes large. On the contrary, when the heat shrinkage amount of the container body is smaller than the heat shrinkage amount of the screw type outer lid, the distance between the first part and the second part becomes smaller. Then, even when the screwing between the container body and the screw type outer lid is completed, the distance between the first protrusion and the second portion changes according to the amount of heat shrinkage of each member.

Here, in the above-described configuration, in the screwing of the screw type outer lid, the second protrusion passes through the plurality of first protrusions, and as the screwing progresses, one of the first protrusions and the second protrusion come into contact with each other. It will be easier. Then, a plurality of first protrusions are arranged so that the second protrusion gets over at least one first protrusion. As a result, when the second protrusion gets over any of the first protrusions, whether the distance between the first part and the second part is small or the distance between the first part and the second part is large, A feeling of screwing is provided.

In the resin container, the first part may be the outer peripheral surface of the opening, and the second part may be the inner peripheral surface of the screw type outer lid. According to this configuration, the second protrusion gets over any of the first protrusions regardless of whether the distance between the opening and the screw type outer lid is small or the distance between the opening and the screw type outer lid is large. Occasionally, a sense of screwing is provided.

In the resin container, the second protrusion may be longer than the first protrusion in the vertical direction.
As the screwing of the screw type outer lid progresses, the second protrusion located on the screw type outer lid also displaces downward while being displaced in the circumferential direction. In this regard, if the length of the second protrusion in the vertical direction is larger than that of the first protrusion, the second protrusion, which is long in the vertical direction, is displaced downward as the screw-type outer lid is screwed. As a result, the second protrusion passes through the plurality of first protrusions before the completion of the screwing, and at least one first protrusion and the second protrusion, as compared with the configuration in which the length of the second protrusion in the vertical direction is short. It becomes easy to satisfy that the protrusions come into contact with each other and get over the first protrusions.

In the resin container, the plurality of first protrusions are a group of first protrusions, the first part includes a plurality of groups of the first protrusions equally arranged in the circumferential direction, and the second part is a group of the first protrusions. , A plurality of the second protrusions which are equally arranged in the circumferential direction and have the same number as the first protrusion group may be provided.

According to the above configuration, it is possible to match the timing at which the second protrusion gets over the first protrusion, that is, the timing at which the feeling of screwing is provided, at the plurality of second protrusions. As a result, it is possible to superimpose and strengthen the feeling of screwing caused by each second protrusion overcoming the first protrusion.

In the resin container, the first part includes a plurality of first screw threads evenly arranged in the circumferential direction, and the second part is equally arranged in the circumferential direction and has the same number as the first screw threads. The first protrusion group may be located on each first screw thread, and the second protrusion may be located on each second screw thread. ..

According to the above configuration, the screwing of the container body and the screw type outer lid is completed by completing the screwing of the first screw thread and the second screw thread. Then, since the first protrusion group is located on each first screw thread and the second protrusion is located on each second screw thread, the timing at which each second protrusion gets over the first protrusion and each It is easy to match the timing before the screwing of the second screw thread and the first screw thread is completed. That is, it is easy to match the timing of providing the feeling of screwing with the progress of screwing so that the timing of providing the feeling of screwing is before the completion of the screwing.

In the resin container, the distance between the first protrusions adjacent to each other in the circumferential direction may be such that the second protrusions located at the distance can be moved in the circumferential direction.
The temperature at which the container body and the screw-type outer lid are heated varies depending on the usage environment of the resin container. The amount of heat shrinkage of the container body and the amount of heat shrinkage of the screw type outer lid are also different. As a result, when the screwing between the container body and the screw type outer lid is completed, the relative positions of the first protrusion group and the second protrusion are different depending on the usage environment of the resin container. Here, as described in the conventional example described above, the engaged portion is inserted between the engaging portion of the front stage and the engaging portion of the rear stage, thereby screwing the container body and the screw type outer lid. In the configuration that completes the fitting, the screwing between the container body and the screw type outer lid is forcibly stopped even though the screwing between the container body and the screw type outer lid is not actually completed. .. In this regard, according to the resin container, since the second protrusions can be moved in the circumferential direction at intervals of the first protrusions adjacent to each other in the circumferential direction, the screwing that should be originally advanced can be stopped in the middle of the movement. It is suppressed.

The exploded perspective view which shows the perspective structure in one Embodiment of a resin container. The cross-sectional view which shows the cross-sectional structure in one Embodiment of a resin container. The bottom view which shows the bottom structure of the container body in one Embodiment of a resin container. Partially enlarged cross-sectional view in a state where the first protrusion group and the lid side protrusion are in contact with each other. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. The operation diagram which shows the operation in one Embodiment of a resin container. An enlarged cross-sectional view showing the structure of the first protrusion group and the lid side protrusion in the first modification. An enlarged cross-sectional view showing the structure of the first protrusion group and the lid side protrusion in the second modification. FIG. 3 is an enlarged cross-sectional view showing the structure of the first protrusion group and the lid side protrusion in the third modification. FIG. 5 is an enlarged cross-sectional view showing the structure of the first protrusion group and the lid side protrusion in the fourth modification.

[Resin container]
An embodiment of the resin container will be described with reference to FIGS. 1 to 12.
First, the configuration of the resin container will be described with reference to FIGS. 1 to 3. Next, with reference to FIGS. 4 to 8, the screwing when the heat shrinkage amount of the container body is larger than the heat shrinkage amount of the screw type outer lid will be described. Then, with reference to FIGS. 9 to 10, the screwing when the heat shrinkage amount of the screw type outer lid and the heat shrinkage amount of the container body are substantially equal will be described, and with reference to FIGS. 11 to 12, the screw The screwing when the heat shrinkage amount of the outer lid is larger than the heat shrinkage amount of the container body will be described.

As shown in FIG. 1, the resin container 10 includes a container body 20 having a bottomed tubular shape and a screw-type outer lid 50 having a covered tubular shape. The container body 20 includes a container screw portion 25. The screw type outer lid 50 is configured to be screwable with the container screw portion 25.

The material constituting the resin container 10 is a resin that undergoes heat shrinkage by heating, and is, for example, a crystalline resin or a non-crystalline resin. The crystalline resin is, for example, any one selected from the group consisting of polyethylene, polypropylene, and polyethylene terephthalate. The non-crystalline resin is, for example, polystyrene. The material constituting the container body 20 and the material constituting the screw type outer lid 50 may be equal to each other or different from each other.

The resin container 10 has, for example, a heat resistant temperature of 140 ° C. or lower, and is configured such that the contents can be heated by a microwave oven. The resin container 10 causes heat shrinkage each time it is heated by repeating heating in a microwave oven, and heat shrinkage is accumulated by repeating heating. From the viewpoint of obtaining the flexibility of the resin container 10, the material constituting the resin container 10 is preferably a crystalline resin.

In the resin container 10, the heat shrinkage amount of the container body 20 and the heat shrinkage amount of the screw type outer lid 50 are different from each other, so that the outer peripheral surface of the container body 20 and the inner peripheral surface of the screw type outer lid 50 are separated from each other. The screw gap HA, which is the distance, changes. For example, when the heat shrinkage amount of the container body 20 is larger than the heat shrinkage amount of the screw type outer lid 50, the screwing gap HA is large, and the heat shrinkage amount of the container body 20 and the heat shrinkage amount of the screw type outer lid 50 are large. If they are equal to each other, the screw gap HA is small. Further, when the heat shrinkage amount of the screw type outer lid 50 is larger than the heat shrinkage amount of the container body 20, the screw gap HA is further smaller.

[Container body]
The container body 20 includes a peripheral wall portion 22 having a cylindrical shape and a container bottom wall portion 40 having a polygonal flat plate shape. The peripheral wall portion 22 and the container bottom wall portion 40 partition the accommodating portion 21 having a concave shape. The storage unit 21 stores contents such as food. In the resin container 10, the side of the screw type outer lid 50 with respect to the container body 20 is also referred to as the upper side, and the side of the container body 20 with respect to the screw type outer lid 50 is also referred to as the lower side.

The peripheral wall portion 22 includes an opening 23 which is a wall having a cylindrical shape, and the container screw portion 25 is located on the outer peripheral surface of the opening 23. The opening 23 includes a top surface 24, which is an upper end surface of the container body 20. The container screw portion 25 includes one container-side screw peripheral wall 26 having a cylindrical shape, and six container screw threads 27, which is an example of the first screw thread. Each container screw thread 27 is a ridge protruding outward in the radial direction of the container-side screw peripheral wall 26 on the outer peripheral surface of the container-side screw peripheral wall 26. The six container screw threads 27 are evenly arranged along the circumferential direction so that the ends of the container screw threads 27 adjacent to each other overlap each other in the vertical direction in the circumferential direction of the container-side screw peripheral wall 26.

The number of the container screw threads 27 is not limited to six, and may be one or more. When the screwing of the container body 20 and the screw type outer lid 50 is completed, the larger the number of the container screw threads 27, the smaller the rotation angle of the screw type outer lid 50. For example, if the number of the container screw threads 27 is two, the rotation angle of the screw type outer lid 50 is about 180 ° in order to complete the screwing of the container body 20 and the screw type outer lid 50. On the other hand, if the number of the container screw threads 27 is 6, the rotation angle of the screw type outer lid 50 is sufficient to complete the screwing of the container body 20 and the screw type outer lid 50. .. However, if the number of the container screw threads 27 is excessively large, the strength of the screwing between the container body 20 and the screw type outer lid 50 is weakened. Therefore, the number of the container screw threads 27 is appropriately selected from the viewpoint of convenience at the time of screwing and screw strength described above.

The peripheral wall portion 22 includes a flange portion 30 having an annular plate shape. The flange portion 30 is a part of the opening 23 and is located at the lower end of the opening 23. The flange portion 30 projects radially outward in the opening 23 over the entire circumferential direction of the opening 23. The flange portion 30 increases the mechanical strength of the container body 20 in the radial direction of the opening 23. The flange portion 30 further includes a first protrusion group 31 on the outer peripheral surface of the flange portion 30. The first protrusion group 31 is evenly arranged at intervals along the circumferential direction of the flange portion 30. There is one first protrusion group 31 for each container screw thread 27. The outer peripheral surface of the flange portion 30 is an example of the first portion.

The first protrusion group 31 includes a first front-stage protrusion 32, which is an example of the first protrusion, and a first rear-stage protrusion 33. The first front-stage protrusion 32 and the first rear-stage protrusion 33 project from the outer peripheral surface of the flange portion 30 toward the inner peripheral surface of the screw-type outer lid 50 in the closed resin container 10. When the resin container 10 is closed, one direction in which the screw-type outer lid 50 rotates with respect to the container body 20 is the screwing direction RD, that is, the second screw-type outer lid 50 is screwed. This is the direction in which the protrusion advances. The first rear projection 33 is located in the screwing direction RD with respect to the first front projection 32. The first front-stage protrusion 32 and the first rear-stage protrusion 33 are separated from each other in the screwing direction RD.

In the radial direction of the flange portion 30, the size of the first front-stage protrusion 32 protruding is smaller than the size of the first rear-stage protrusion 33 protruding in the radial direction. In other words, in the closed resin container 10, the distance between the inner peripheral surface of the screw-type outer lid 50 and the first front-stage protrusion 32 is the distance between the inner peripheral surface of the screw-type outer lid 50 and the first rear-stage protrusion 33. Greater than the distance. That is, the first front-stage protrusion 32 and the first rear-stage protrusion 33 are lined up so that the distance between the inner peripheral surface of the screw-type outer lid 50 and the first protrusion group 31 becomes smaller in the screwing direction RD.

The peripheral wall portion 22 has an upper corrugated wall 48 at the lower end of the flange portion 30 over the entire circumferential direction of the flange portion 30. The upper wavy wall 48 has a wavy shape that protrudes downward. The upper end of the upper wavy wall 48 is connected to the flange portion 30, and the lower end of the upper wavy wall 48 is connected to the lower wavy wall 46. The lower wavy wall 46 has a wavy shape protruding upward, and the inner diameter of the lower end of the lower wavy wall 46 is reduced downward. The upper end of the lower wavy wall 46 is connected to the upper wavy wall 48, and the lower end of the lower wavy wall 46 is a flat wall portion 45 and a corner with respect to one wavy shape of the lower wavy wall 46. One is connected to each part 44.

As shown in FIG. 3, the flat wall portion 45 and the corner portion 44 are alternately arranged along the circumferential direction of the flange portion 30. The flat wall portion 45 has a rectangular flat plate shape having an inclination toward the lower inward side of the flange portion 30. The corner portion 44 is located between the flat wall portions 45 adjacent to each other, and has a triangular plate shape having an inclination toward the lower inward side of the flange portion 30. The corner portion 44 has a shape in which the boundary portion between the plane wall portions 45 is chamfered. The flat wall portion 45 and the corner portion 44 have a polygonal tubular shape whose diameter is reduced downward. The lower end of the flat wall portion 45 is connected to the bottom curved portion 43, and the lower end of the corner portion 44 is connected to the bottom curved corner portion 47. The bottom curved portion 43 and the bottom curved corner portion 47 are arranged alternately along the circumferential direction of the flange portion 30, and the lower end of the bottom curved portion 43 and the lower end of the bottom curved corner portion 47 are connected to the container bottom wall portion 40. It is set up.

The lower surface of the container bottom wall portion 40 includes four bottom support portions 41. The gate mark 42 is located at the center of the lower surface of the container bottom wall portion 40. Each bottom support portion 41 is a ridge having an arc shape located on a circle centered on the gate mark 42. Each bottom support portion 41 is in contact with a mounting surface on which the resin container 10 is mounted. Each bottom support portion 41 forms a gap between the lower surface of the container bottom wall portion 40 and the mounting surface, and promotes heat dissipation when the resin container 10 is heated.

[Screw type outer lid]
Returning to FIG. 1, the screw type outer lid 50 includes a lid plate portion 60 having a disk shape and a lid peripheral wall 51 having a cylindrical shape.

The lid peripheral wall 51 includes a plurality of non-slip portions 52 scattered along the circumferential direction of the lid peripheral wall 51. The non-slip portion 52 has small irregularities in a semicircular region protruding downward. The non-slip portion 52 is formed by, for example, sandblasting. The non-slip portion 52 prevents the hand from slipping on the screw-type outer lid 50 when the screw-type outer lid 50 is screwed into the container body 20. The boundary portion between the lid peripheral wall 51 and the lid plate portion 60 is an outer peripheral step portion 57. The outer peripheral step portion 57 is continuously provided on the outer edge of the lid plate portion 60, and the lid peripheral wall 51 projects from the lower end of the outer peripheral step portion 57 toward the outer lower side. The outer peripheral step portion 57 has a lid peripheral wall 51 arranged outside the outer edge of the lid plate portion 60.

The lid plate portion 60 includes a lid outer peripheral portion 61 located on the outermost circumference of the lid plate portion 60, a lid intermediate portion 62, and a lid inner peripheral portion 63 located on the innermost circumference of the lid plate portion 60. A gate mark 64 is located at the center of the inner peripheral portion 63 of the lid. The lid outer peripheral portion 61 and the lid intermediate portion 62 have an annular plate shape that is concentric with each other centering on the gate mark 64. The boundary portion between the lid outer peripheral portion 61 and the lid intermediate portion 62 and the boundary portion between the lid intermediate portion 62 and the lid inner peripheral portion 63 have a downward step. The lid plate portion 60 is gradually recessed downward by a step at each boundary portion from the outer peripheral portion of the lid plate portion 60 toward the gate mark 64.

As shown in FIG. 2, the lid peripheral wall 51 includes a lid-side screw portion 53, a thin-walled portion 56, and an outer ring 72. The lid-side screw portion 53 is composed of a lid-side screw peripheral wall 54 and a lid screw thread 55, which is an example of a second screw thread. The lid-side screw peripheral wall 54 is located outside the outer ring 72. Six lid screw ridges 55 are located on the lid-side screw peripheral wall 54 over the entire circumferential direction. The six lid screw ridges 55 are arranged along the circumferential direction so that the ends of the lid screw ridges 55 adjacent to each other overlap each other in the circumferential direction in the circumferential direction of the lid side screw peripheral wall 54. That is, each lid screw thread 55 is configured to be screwable with a separate container screw thread 27. The thin-walled portion 56 is located at the lower end of the lid-side screw portion 53 and is thinner than the lid-side screw peripheral wall 54.

As shown in FIG. 3, the inner peripheral surface of the thin-walled portion 56 is an example of the second portion, and includes a plurality of lid-side protrusions 58 extending in the vertical direction. The plurality of lid side protrusions 58 are an example of the second protrusion, and are six protrusions extending in the vertical direction located on the inner peripheral surface of the screw type outer lid 50. The lid-side protrusion 58 projects from the inner peripheral surface of the screw-type outer lid 50 to the outer peripheral surface of the container body 20 in the radial direction of the screw-type outer lid 50. The lid-side protrusion 58 is located on the entire surface from the lower end of the thin-walled portion 56 to the lower end of the lid-side screw portion 53 in the vertical direction. When the container screw portion 25 and the lid side screw portion 53 are screwed together, the lid side protrusion 58 gets over the first front stage protrusion 32 or the first rear stage protrusion 33 in the screwing direction RD before the screwing is completed. This provides the user with a sense of screwing.

The six lid-side protrusions 58 are evenly arranged at intervals along the circumferential direction of the thin-walled portion 56. Further, the six first projection groups 31 are also arranged at equal intervals along the outer peripheral surface of the flange portion 30. That is, the combination of the lid side protrusion 58 and the first protrusion group 31 is one set for each container screw portion 25 and one set for each lid side screw portion 53. When the container screw portion 25 and the lid side screw portion 53 are screwed together, each lid side protrusion 58 gets over the separate first protrusion group 31 at the same time. Then, all the combinations of the lid side protrusion 58 and the first protrusion group 31 contribute to providing a feeling of screwing.

The outer peripheral portion on the lower surface of the lid outer peripheral portion 61 includes a container insertion portion 70 which is a U-shaped groove which opens downward. The container insertion portion 70 is an annular protrusion centered on the gate mark 64 of the lid plate portion 60. The container insertion portion 70 includes an outer ring 72, a groove bottom wall 73, and an inner ring 71 in this order from the outer peripheral wall.

The inner ring 71 is an annular ridge along the circumferential direction of the lid plate portion 60, and is located inside the groove bottom wall 73 in the radial direction. The inner ring 71 projects from the lower surface of the lid plate portion 60 toward the inside of the opening 23 over the entire circumferential direction of the opening 23. The outer ring 72 and the inner ring 71 form a groove side wall of the U-shaped groove.

The top surface 24 of the opening 23 of the container body 20 is inserted into the container insertion portion 70 in the closed resin container 10. The top surface 24 of the opening 23 inserted into the container insertion portion 70 is in close contact with the bottom surface of the container insertion portion 70, thereby closing the resin container 10, that is, the container body 20 and the screw type outer lid 50. The screwing is completed.

[Protrusion]
FIG. 4 shows a state in which the first rear-stage projection 33 and the lid-side projection 58 are in contact with each other, and the lid-side projection 58 gets over the first rear-stage projection 33 from the back side of the paper surface toward the front side of the paper surface.

As shown in FIG. 4, the lid-side protrusion 58 is located on the back side of the paper surface with respect to the first rear-stage protrusion 33, and is indicated by a broken line. The lid-side protrusion 58 has a semi-cylindrical shape extending in the vertical direction, and is located on the inner surface of the thin-walled portion 56 over the entire vertical direction of the thin-walled portion 56. The length of the lid side protrusion 58 in the vertical direction is equal to the length of the thin wall portion 56 in the vertical direction. The distance from the boundary between the thin-walled portion 56 and the lid-side screw peripheral wall 54 to the lower end of the thin-walled portion 56 is the second protrusion height FT. The length of the lid side protrusion 58 in the vertical direction is equal to the height of the second protrusion FT.

The first front-stage protrusion 32 and the first rear-stage protrusion 33 have a semi-cylindrical shape extending in the vertical direction. The first protrusion group 31 is located on the outer peripheral surface of the flange portion 30 over the vertical direction of the flange portion 30. The length of the first rear projection 33 in the vertical direction is equal to the length of the flange portion 30 in the vertical direction. The distance from the upper end to the lower end of the flange portion 30 is the first protrusion height YT. The first protrusion height YT is shorter than the second protrusion height FT.

The position of the lid side protrusion 58 advances in the screwing direction RD toward the first rear stage protrusion 33 and is displaced downward toward the first rear stage protrusion 33 by the time the screwing of the screw type outer lid 50 is completed. To do. The position of the first rear projection 33 in the screwing direction RD and the circumferential direction of the first posterior protrusion 33 so that the lid-side projection 58 and the first rear projection 33 that are displaced in this way come into contact with each other before the screwing is completed. And the height of the second protrusion FT are set. Further, the position of the first rear projection 33 in the screwing direction RD and the circumferential direction of the first posterior protrusion 33 so that the lid side projection 58 and the first rear projection 33 get over each other before the completion of the screwing. The position is set.

For example, in the pair of the container screw thread 27 and the lid screw thread 55 that are screwed to each other, the lid side protrusion 58 corresponding to the container screw thread 27 is located near the tip of the container screw thread 27 in the screwing direction RD. Further, the first rear projection 33 corresponding to the lid screw thread 55 is located near the tip of the lid screw thread 55 in the screwing direction RD. As a result, before the screwing between the tip of the container screw thread 27 and the tip of the lid screw thread 55 is completed, the lid side protrusion 58 corresponding to these and the first rear stage protrusion 33 come into contact with each other and get over each other.

The radial length between the outer peripheral wall and the inner peripheral surface of the lid-side screw peripheral wall 54 is the female screw thickness NA. The length in the radial direction between the outer peripheral surface and the inner peripheral surface of the thin wall portion 56 is the thin wall thickness UA. The female screw thickness NA is larger than the thin wall thickness UA. When the female screw thickness NA is larger than the thin wall thickness UA, the mechanical strength of the lid side screw peripheral wall 54 is increased, and the deformation of the screw type outer lid 50 is suppressed. The fact that the thin-walled thickness UA is smaller than the female screw thickness NA means that a gap is secured between the flange portion 30 and the thin-walled portion 56 so that the first rear-stage protrusion 33 and the lid-side protrusion 58 get over each other. Make it easier.

The distance in the radial direction between the inner peripheral surface of the lid-side screw peripheral wall 54 and the central axis CA of the resin container 10 is the first lid inner diameter NW. The distance in the radial direction between the inner peripheral surface of the thin portion 56 and the central axis CA of the resin container 10 is the inner diameter KW of the second lid. The first lid inner diameter NW is shorter than the second lid inner diameter KW, and the inner peripheral surface of the lid-side screw peripheral wall 54 is located inside the lid-side protrusion 58 in the radial direction. The fact that the lid-side screw peripheral wall 54 is located inside the lid-side protrusion 58 in the radial direction makes it easy to pull out the mold located inside the screw-type outer lid 50 downward during die-cutting in injection molding. ..

[Action]
With reference to FIGS. 5 to 8, the provision of a feeling of screwing when the amount of heat shrinkage of the container body 20 is larger than the amount of heat shrinkage of the screw type outer lid 50 will be described. FIG. 5 shows that the lid side protrusion 58 is located in front of the first protrusion group 31 with respect to the screwing direction RD. Further, FIG. 5 shows the position of the outer peripheral surface 3S of the flange portion 30 by a chain double-dashed line when the amount of heat shrinkage of the screw type outer lid 50 and the amount of heat shrinkage of the container body 20 are substantially equal.

As shown in FIG. 5, the lid side protrusion 58, the first front stage protrusion 32, and the first rear stage protrusion 33 are located in this order in the screwing direction RD. The size of the lid-side protrusion 58 protruding from the inner peripheral surface 5S of the lid peripheral wall 51 is the lid-side protrusion amount H0. The size of the first front-stage protrusion 32 protruding from the outer peripheral surface 3S of the flange portion 30 is the first front-stage protrusion amount HS. The size of the first rear-stage protrusion 33 protruding from the outer peripheral surface 3S of the flange portion 30 is the first rear-stage protrusion amount HH. The distance in the circumferential direction between the first front-stage protrusion 32 and the first rear-stage protrusion 33 is the separation distance BW. The separation distance BW is sufficiently larger than the circumferential distance of the lid-side protrusion 58, and allows the lid-side protrusion 58 to move between the first front-stage protrusion 32 and the first rear-stage protrusion 33. The distance between the inner peripheral surface 5S of the lid peripheral wall 51 and the outer peripheral surface 3S of the flange portion 30 is the screwing gap HA.

For example, when the heat shrinkage amount of the container body 20 is larger than the heat shrinkage amount of the screw type outer lid 50, such as when only the container body 20 is heated, in the resin container whose lid has been started to be closed, The first front-stage protrusion 32 and the first rear-stage protrusion 33 are displaced inward with respect to the lid-side protrusion 58, and the screwing gap HA is widened.

Here, when the heat shrinkage amount of the container body 20 is larger than the heat shrinkage amount of the screw type outer lid 50, the total of the lid side protrusion amount H0 and the first front stage protrusion amount HS is smaller than the screw gap HA. The first front-stage protrusion 32, the first rear-stage protrusion 33, and the lid-side protrusion 58 are arranged so as to be. As a result, as shown in FIG. 6, when the lid side protrusion 58 advancing in the screwing direction RD passes through the first protrusion group 31, the first front protrusion 32 does not come into contact with the first front protrusion 32. Toward the first rear projection 33.

On the other hand, when the heat shrinkage amount of the container body 20 is larger than the heat shrinkage amount of the screw type outer lid 50, the total of the lid side protrusion amount H0 and the first rear stage protrusion amount HH is larger than the screw gap HA. .. Therefore, as shown in FIG. 7, the lid-side protrusion 58 that has passed through the first front-stage protrusion 32 comes into contact with the first rear-stage protrusion 33, and temporarily stops the progress of the lid-side protrusion 58. Then, a feeling of resistance due to the contact between the lid-side protrusion 58 and the first rear-stage protrusion 33 is provided as a feeling of screwing.

Next, when the lid-side protrusion 58 receives stress in the screwing direction RD, the lid-side protrusion 58 gets over the first rear-stage protrusion 33 as shown in FIG. When the lid-side protrusion 58 gets over the first rear-stage protrusion 33, the lid-side protrusion 58 is elastically deformed or the first rear-stage protrusion 33 is elastically deformed, and the sound or vibration generated by the elastic deformation is provided as a feeling of screwing. Then, when the lid side protrusion 58 further advances in the screwing direction RD, as the screwing progresses, the bottom surface of the container insertion portion 70 and the top surface 24 of the opening 23 come into close contact with each other, whereby the resin container 10 The closing of the lid, that is, the screwing of the container body 20 and the screw type outer lid 50 is completed.

Next, with reference to FIG. 9, the provision of a feeling of screwing when the amount of heat shrinkage of the screw type outer lid 50 and the amount of heat shrinkage of the container body 20 are substantially equal will be described. FIG. 9 shows that the lid side protrusion 58 is located in front of the first protrusion group 31 with respect to the screwing direction RD.

For example, when the heat shrinkage amount of the container body 20 and the heat shrinkage amount of the screw type outer lid 50 are substantially equal, such as when the resin container is not heated after shipment, the resin whose lid has been closed has been started. In the container making, the first front stage protrusion 32 and the first rear stage protrusion 33 are closer to the lid side protrusion 58 than in the state shown in FIG.

Here, when the heat shrinkage amount of the container body 20 and the heat shrinkage amount of the screw type outer lid 50 are substantially equal, the total of the lid side protrusion amount H0 and the first front stage protrusion amount HS is larger than the screw gap HA. The first front-stage protrusion 32, the first rear-stage protrusion 33, and the lid-side protrusion 58 are arranged so as to be. As a result, as shown in FIG. 9, the lid-side projection 58 advancing in the screwing direction RD abuts on the first projection group 31 and temporarily stops the progress of the lid-side projection 58. Then, a feeling of resistance due to the contact between the lid-side protrusion 58 and the first front-stage protrusion 32 is provided as a feeling of screwing.

Next, when the lid side protrusion 58 receives stress in the screwing direction RD, the lid side protrusion 58 gets over the first front stage protrusion 32 as shown in FIG. When the lid-side protrusion 58 gets over the first front-stage protrusion 32, the lid-side protrusion 58 is elastically deformed or the first front-stage protrusion 32 is elastically deformed, and the sound or vibration generated by the elastic deformation is provided as a feeling of screwing. Then, when the lid side protrusion 58 further advances in the screwing direction RD, the lid side protrusion 58 moves between the first front stage protrusion 32 and the first rear stage protrusion 33, and the lid side protrusion 58 moves to the first rear stage. It comes into contact with the protrusion 33 and also gets over the first rear-stage protrusion 33.
As a result, the closing of the resin container 10, that is, the screwing of the container body 20 and the screw type outer lid 50 is completed. Alternatively, the lid-side protrusion 58 abuts on the first rear-stage protrusion 33 and stops, thereby completing the closing of the resin container 10, that is, the screwing of the container body 20 and the screw-type outer lid 50.

Next, with reference to FIGS. 11 and 12, the provision of a feeling of screwing when the amount of heat shrinkage of the screw type outer lid 50 is larger than the amount of heat shrinkage of the container body 20 will be described. A case where the lid side protrusion 58 at the time of completion of screwing is located in front of the first front stage protrusion 32 will be described with reference to FIG. Next, with reference to FIG. 12, a case where the lid side protrusion 58 at the time of completion of screwing is located between the first front stage protrusion 32 and the first rear stage protrusion 33 will be described. In addition, in FIG. 11 and FIG. 12, the position of the inner peripheral surface 5S of the lid peripheral wall 51 when the heat shrinkage amount of the screw type outer lid 50 and the heat shrinkage amount of the container body 20 are substantially equal is shown by a two-dot chain line.

As shown in FIG. 11, the heat shrinkage amount of the screw type outer lid 50 is the heat shrinkage amount of the container body 20, as in the case where the container body 20 is an unheated product and the screw type outer lid 50 is a heated product. In the case of a larger size, in the resin container for which the lid has been closed, the first front-stage protrusion 32 and the first rear-stage protrusion 33 are closer to the lid-side protrusion 58 than in the state shown in FIG. In other words, the screwing gap is further narrowed.

Then, when the lid side protrusion 58 is further screwed from the state where it is located in front of the first front stage protrusion 32, the lid side protrusion 58 comes into contact with the first front stage protrusion 32 and gets over the first front stage protrusion 32. At this time, the feeling of resistance due to the contact between the lid-side protrusion 58 and the first front-stage protrusion 32, and the sound and vibration when the lid-side protrusion 58 gets over the first front-stage protrusion 32 are provided as a feeling of screwing. ..

As shown in FIG. 12, when the lid side protrusion 58 is further subjected to stress in the screwing direction RD, the lid side protrusion 58 abuts on the first rear stage protrusion 33, but the screwing gap HA is narrowed. As a result, the first rear-stage protrusion 33 cannot be overcome, whereby the screwing is completed. Alternatively, the lid-side protrusion 58 does not reach the first rear-stage protrusion 33 due to the narrowing of the screw gap HA, and stops in contact with the inner peripheral surface 5S of the lid peripheral wall 51, whereby the screwing is completed. To do.

As described above, according to the above embodiment, the following effects can be obtained.
(1) The first protrusion group 31 includes a first rear-stage protrusion 33 over which the lid-side protrusion 58 gets over when the screw gap HA is large, and further, a first first protrusion 58 over which the lid-side protrusion 58 gets over when the screw gap HA is small. The front stage protrusion 32 is provided. Therefore, even if the screw gap HA changes due to heat shrinkage, it is possible to provide a feeling of screwing.

(2) As the screwing of the screw type outer lid 50 progresses, the lid side protrusion 58 located on the screw type outer lid 50 is also displaced downward while being displaced in the circumferential direction. At this time, if the length of the lid side protrusion 58 in the vertical direction is larger than the length of the first protrusion group 31 in the vertical direction, the screw type outer lid 50 is screwed in the vertical direction as the screw type outer lid 50 is screwed. The long lid side protrusion 58 is displaced downward. This makes it possible to increase the accuracy with which the lid side protrusion 58 is crossed by the first protrusion group 31.

As a result, it becomes easier for the lid-side projection 58 to pass through the first projection group 31 before the screwing is completed, as compared with the configuration in which the length of the lid-side projection 58 in the vertical direction is short. Further, the first front stage protrusion 32 and the lid side protrusion 58 come into contact with each other so that the lid side protrusion 58 gets over the first front stage protrusion 32, or the first rear stage protrusion 33 and the lid side protrusion 58 come into contact with each other and the lid side protrusion 58 comes into contact with each other. It becomes easy to satisfy that 58 gets over the first rear projection 33.

(3) The outer peripheral surface of the flange portion 30 includes a plurality of first protrusion groups 31 evenly arranged in the circumferential direction, and the inner peripheral surface of the thin-walled portion 56 is equally arranged in the circumferential direction with the first protrusion group 31. A plurality of lid side protrusions 58 having the same number are provided. As a result, the timing at which the lid-side projection 58 gets over the first front-stage projection 32 and the first rear-stage projection 33, that is, the timing at which the feeling of screwing is provided, can be matched in the plurality of lid-side projections 58. .. As a result, it is possible to superimpose and strengthen the feeling of screwing caused by each lid-side protrusion 58 overcoming the first protrusion group 31.

(4) Since the first protrusion group 31 is located on each container screw thread 27 and the lid side protrusion 58 is located on each lid screw thread 55, each lid side protrusion 58 is located on the first protrusion group 31. It is easy to match the timing of overcoming the above with the timing of completing the screwing of each lid screw thread 55 and the container screw thread 27. That is, it is easy to match the timing of providing the feeling of screwing with the progress of screwing so that the timing of providing the feeling of screwing is before the completion of the screwing.

(5) The temperature at which the container body 20 and the screw type outer lid 50 are heated varies depending on the usage environment of the resin container 10. The amount of heat shrinkage of the container body 20 and the amount of heat shrinkage of the screw type outer lid 50 are also different. As a result, when the screwing of the container body 20 and the screw type outer lid 50 is completed, the relative positions of the first protrusion group 31 and the lid side protrusion 58 are different depending on the usage environment of the resin container 10. It becomes.

Here, in a configuration in which the lid side protrusion 58 is inserted between the first front stage protrusion 32 and the first rear stage protrusion 33, thereby completing the screwing of the container body 20 and the screw type outer lid 50, the container is used. Although the screwing between the main body 20 and the screw type outer lid 50 is not actually completed, the screwing between the container main body 20 and the screw type outer lid 50 is forcibly stopped. For example, the lid-side protrusion 58 needs to rotate by a predetermined screwing distance along the circumferential direction of the flange portion 30 from the start of screwing to the completion of screwing. Here, when the container body 20 is heat-shrinked without the screw-type outer lid 50 being heat-shrinked, the position of the flange portion 30 facing the lid-side protrusion 58 at the start of screwing and the position at the start of screwing The distance of the screwing direction RD from the first protrusion group 31 in the above is shorter than the screwing distance by the amount of heat shrinkage of the container body 20. As a result, the lid-side protrusion 58 is inserted between the first front-stage protrusion 32 and the first rear-stage protrusion 33, so that the bottom surface of the container insertion portion 70 and the top surface 24 of the opening 23 are in close contact with each other, that is, the container body 20. It precedes the completion of the screwing between the screw type outer lid 50 and the screw type outer lid 50.

In this regard, according to the resin container 10, the lid-side protrusion 58 can be moved in the circumferential direction at the distance between the first front-stage protrusion 32 and the first rear-stage protrusion 33, so that the screwing that should be originally advanced is in the middle of the process. It is suppressed that it is stopped by.

(6) The outer peripheral surface of the flange portion 30 is the outermost surface of the container body 20, which is a portion of the resin container 10 that is relatively easy to clean, and is also inside the resin container 10. It is a part that is relatively easy to process. In this respect, since the first projection group 31 composed of the first front projection 32 and the first rear projection 33 is located on the outer peripheral surface of the flange portion 30, the effect according to the above (1) to (5) can be obtained. In order to obtain the resin container 10, it is possible to suppress the deterioration of the cleanability of the resin container 10 and the difficulty in manufacturing the resin container 10.

The above embodiment can be modified as follows.
[Change example 1: Intermediate protrusion]
As shown in FIG. 13, the first projection group 31 having a plurality of engaging portions may further include an intermediate projection 34 between the first front projection 32 and the first rear projection 33. The protrusion amount CH, which is the size at which the intermediate protrusion 34 protrudes, is larger than the size at which the first front-stage protrusion 32 protrudes, and is smaller than the size at which the first rear-stage protrusion 33 protrudes. In the screwing direction RD, the intermediate protrusion 34 is located between the first front stage protrusion 32 and the first rear stage protrusion 33. The distance BWA in the screwing direction RD between the first front protrusion 32 and the intermediate protrusion 34 may be equal to or different from the distance BWB in the screwing direction RD between the intermediate protrusion 34 and the first rear protrusion 33. You may.

If the configuration includes the intermediate protrusion 34, it is possible to provide a more appropriate screwing feeling or to widen the temperature range in which the screwing feeling can be obtained.
For example, when the separation distance BW between the first front-stage protrusion 32 and the first rear-stage protrusion 33 is the same as that of the above-described embodiment, the protrusion that provides a more suitable screwing feeling in the first protrusion group 31 It is possible to selectively bring the lid side protrusion 58 into contact with the first protrusion group 31. Further, for example, when the separation distance BW between the first front stage protrusion 32 and the first rear stage protrusion 33 is larger than that of the above-described embodiment, it is possible to provide a feeling of screwing even with a larger heat shrinkage difference.

[Change example 2: Third protrusion]
As shown in FIG. 14, a third protrusion 35 may be provided in the screwing direction RD of the first rear stage protrusion 33. The protrusion amount HT of the third protrusion 35 is higher than the protrusion amount HH of the first rear stage. The distance TW between the first rear projection 33 and the third projection 35 in the circumferential direction is sufficiently smaller than the separation distance BW, and is substantially equal to, for example, the distance of the lid side projection 58 in the circumferential direction. The size is such that the lid side protrusion 58 can be locked between the three protrusions 35.

According to this configuration, the lid-side protrusion 58 that has passed over the first rear-stage protrusion 33 is locked between the first rear-stage protrusion 33 and the third protrusion 35. Therefore, it is possible to prevent the lid side protrusion 58 from advancing in the direction opposite to the screwing direction RD, that is, the screwing between the container body 20 and the screw type outer lid 50 from loosening.

[Change example 3: Combined protrusion]
As shown in FIG. 15, the first front-stage protrusion 32 and the first rear-stage protrusion 33 may be one protrusion having a shape in which the two protrusions are united. For example, a protrusion connecting portion 36 for connecting the first front-stage protrusion 32 and the first rear-stage protrusion 33 may be provided between the first front-stage protrusion 32 and the first rear-stage protrusion 33.

According to this configuration, the lid-side protrusion 58 that has passed over the first front-stage protrusion 32 is connected to the protrusion connecting portion 36 between the first front-stage protrusion 32 and the first rear-stage protrusion 33 by the amount that the protrusion connecting portion 36 protrudes. Can abut. Therefore, it is possible to prevent the lid-side protrusion 58 that has passed over the first front-stage protrusion 32 from advancing in the direction opposite to the screwing direction RD, that is, the screwing between the container body 20 and the screw-type outer lid 50 from loosening. ..

[Change example 4: Quantity of protrusions]
As shown in FIG. 16, the screw type outer lid 50 may be provided with two lid side protrusions 80, 81, and the container body 20 has two first front stage protrusions 32, 37 and two first. Post-stage protrusions 33 and 38 may be provided. At this time, the distance between the two lid side protrusions 80 and 81 in the circumferential direction is the same as the distance between the two first front protrusions 32 and 37 in the circumferential direction and the distance between the two first rear protrusions 33 and 38 in the circumferential direction. equal.

In such a configuration, when the container body 20 and the screw type outer lid 50 are screwed together, the lid side protrusions 80 and 81 do not come into contact with the first front stage protrusions 32 and 37, and the first front stage protrusions 32, It passes through 37 in the screwing direction RD. Subsequently, the lid-side protrusion 81 that has passed through the first front-stage protrusions 32 and 37 comes into contact with the first rear-stage protrusion 33, and after passing over the first rear-stage protrusion 33, comes into contact with the first rear-stage protrusion 38. At this time, the lid-side protrusion 81 that has passed through the first front-stage protrusions 32 and 37 comes into contact with the first rear-stage protrusion 33. Then, when the container body 20 and the screw type outer lid 50 are screwed together, the two lid side protrusions 80 and 81 get over the separate first rear stage protrusions 33 and 38 at the same timing. This makes it possible to provide a stronger feeling of screwing.

-The combination of the first protrusion group 31 and the lid side protrusion 58 is not limited to one set for each screw thread, and may be one set for each of two screw threads, for example, two sets for each screw thread. It may be.
-The container body 20 may include a plurality of first protrusion groups 31 arranged in the vertical direction. At this time, the screw type outer lid 50 may be provided with a plurality of lid side protrusions 58 so as to engage with the first protrusion group 31 through the screwing between the container body 20 and the screw type outer lid 50.

The position of the first protrusion group 31 is not limited to the flange portion 30, but can be changed to the opening portion 23. At this time, the container body 20 may have a configuration in which the flange portion 30 is omitted. In short, the first protrusion group 31 may be configured to be located on the container body 20 so as to engage with the lid side protrusion 58 through the screwing between the container body 20 and the screw type outer lid 50.

10 ... Resin container 20 ... Container body 23 ... Opening 30 ... Flange part 31 ... First protrusion group 50 ... Screw type outer lid 56 ... Thin-walled part 58 ... Lid side protrusion 60 ... Lid plate part RD ... Screwing direction

Claims (6)

A container body with a tubular opening and
A screw-type outer lid having an inner peripheral surface that is screwed with the outer peripheral surface of the opening is provided.
Either one of the outer peripheral surface and the inner peripheral surface is the first part.
Of the outer peripheral surface and the inner peripheral surface, other than the first part is the second part.
The first part comprises a plurality of first protrusions protruding toward the second part.
The second part comprises a second protrusion protruding toward the first part.
When the screw type outer lid is screwed, the direction in which the second protrusion advances is the screwing direction.
The plurality of first protrusions are arranged in the circumferential direction of the first part so that the distance between each of the first protrusions and the second part becomes smaller in the screwing direction.
A resin container configured such that the second protrusion passes through the plurality of first protrusions before the completion of the screwing, comes into contact with at least one of the first protrusions, and gets over the first protrusion. The first part is an outer peripheral surface of the opening, and is
The resin container according to claim 1, wherein the second part is an inner peripheral surface of the screw type outer lid. The resin container according to claim 1 or 2, wherein the second protrusion is longer than the first protrusion in the vertical direction. The plurality of first protrusions are a group of first protrusions.
The first part includes a plurality of the first protrusion groups evenly distributed in the circumferential direction.
The resin container according to any one of claims 1 to 3, wherein the second part is provided with a plurality of the second protrusions equally arranged in the circumferential direction and having the same number as the first protrusion group. The first part includes a plurality of first screw threads evenly distributed in the circumferential direction.
The second part includes a plurality of second screw threads that are equally arranged in the circumferential direction and have the same number as the first screw threads.
The first protrusion group is located one on each first screw thread.
The resin container according to claim 4, wherein the second protrusion is located one on each second screw thread. The distance between the first protrusions adjacent to each other in the circumferential direction is the size that allows the second protrusions located at the distance to move in the circumferential direction, according to any one of claims 1 to 5. Resin container.

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