Caps for paper containers

Abstract

To provide a cap for a paper container that can ensure sealability without hindering taking out of a content.SOLUTION: A cap for a paper container including an end portion provided with a discharge spout and one or more surfaces standing along an edge of the end portion includes: a plate-shaped main portion that covers the end portion when the cap is attached to the paper container; an opening portion that is provided on the main portion and overlaps the discharge spout when the cap is attached to the paper container; a cylindrical side portion standing along an edge of the main portion; a strap in contact with a tip end of the side portion and extending from an outer periphery surface of the side surface; and a lid portion for closing the opening portion provided on the strap. The strap is located outside the outer periphery surface in a free state, and a center of the main portion, the opening portion, and the strap are disposed in order along a predetermined direction when viewed from a standing direction of the side portion.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a cap for a paper container. [Background technology]

[0002] Conventionally, for example, plastic containers or paper containers (paper containers) have been used as packaging materials for food, various industrial products, and the like. As an example of the former, for example, Patent Document 1 below discloses a food storage container in which a funnel-shaped lid is provided on the upper edge of a synthetic resin container body. As an example of the latter, for example, Patent Document 2 below discloses a cylindrical spaghetti packaging box formed by assembling paper. The packaging box is provided with an opening for removing a fixed amount of contents on one side end face in the longitudinal direction. The opening can be opened and closed freely by two door pieces and an opening / closing operation piece that are part of the packaging box. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-147768 [Patent Document 2] Japanese Utility Model Application Publication No. 61-99569 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, from the viewpoint of environmental considerations, etc., an increase in demand for the above-mentioned paper containers is predicted. However, when the lid of the opening and closing opening is formed from paper as in the above Patent Document 2, the lid is easily deformed with use, and the sealing performance is easily deteriorated. For this reason, paper containers have problems such as the opening opening opening opening easily opening, causing the contents to spill out unintentionally. In addition, the opening opening opening may not be opened sufficiently due to the deformation of the lid, making it difficult to remove the contents.

[0005] An object of one aspect of the present invention is to provide a cap for a paper container that can ensure airtightness without preventing the contents from being removed. [Means for solving the problem]

[0006] A cap according to one aspect of the present invention is a cap for a paper container having an end where an outlet is provided and one or more surfaces extending along the edge of the end, and comprises a plate-shaped main portion that covers the end when the cap is attached to the paper container, an opening provided in the main portion that overlaps with the outlet when the cap is attached to the paper container, a cylindrical side portion extending along the edge of the main portion, a strap that contacts the tip of the side portion and extends from the outer peripheral surface of the side portion, and a lid portion for closing the opening that is provided on the strap, wherein the strap is positioned outside the outer peripheral surface in a free state, and when viewed from the direction in which the side portion extends, the center of the main portion, the opening, and the strap are arranged in order along a predetermined direction.

[0007] According to this cap, the main part that covers the end of the paper container when the cap is attached to the paper container having the outlet is provided with an opening that overlaps the outlet. As a result, even when the cap is attached to the paper container, the contents of the paper container can be easily taken out through the outlet and the opening. The cap is also provided with a strap that contacts the tip of the side part and extends from the outer circumferential surface of the side part and is located outside the outer circumferential surface in a free state, and a lid part for closing the opening that is connected to the strap, and the center of the main part, the opening, and the strap are arranged in order along a predetermined direction when viewed from the erecting direction of the side part. As a result, when the paper container is tilted to have the outlet and the opening facing down to take out the contents, the lid part hangs down so as to be separated greatly from the opening part. Therefore, the lid part is less likely to interfere when taking out the contents. Therefore, even when the cap is attached to the paper container, the contents of the paper container can be easily taken out while preventing obstruction by the lid part. In addition, by using the lid part, the hermeticity of the paper container can be ensured during resealing, etc. Therefore, by using the above-mentioned cap, it is possible to ensure airtightness without preventing the contents from being removed.

[0008] The side portion may have a first portion connected to the strap and a second portion that comes into close contact with the paper container when the cap is attached to the paper container, and the second portion may have a first protruding portion that protrudes away from the main portion along the erection direction. In this case, the first protruding portion included in the second portion exerts a function of preventing the cap from falling off the paper container. In addition, by using the first protruding portion as a knob, the cap can be easily removed from the paper container while preventing damage to the main portion of the cap, such as the lid portion.

[0009] When the cap is attached to the paper container, the opening may be almost completely overlapped with the outlet when viewed from the vertical direction. In this case, problems with the removal of the contents by the cap are unlikely to occur. In addition, for example, if the outlet has a measuring function, the opening can effectively inherit the measuring function.

[0010] The main part may have a frame-shaped part that protrudes along the edge of the opening, and the lid part may have a second protruding part that can be fitted into the frame-shaped part. In this case, the sealability of the paper container can be ensured well.

[0011] When the lid is closing the opening, the strap may be curved so as to protrude outward in a predetermined direction. In this case, it is possible to limit the arrangement method of the paper containers to which the cap is attached.

[0012] The strap has a base end portion connected to the side portion and a main portion extending from the base end portion to the lid portion, and the width and thickness of the base end portion may be greater than the width and thickness of the main portion. In this case, damage at the boundary between the side portion and the strap can be suppressed. In addition, the provision of the base end portion makes it difficult for the entire lid portion to sag. As a result, even when the paper container with the cap attached is turned upside down to remove the contents, the lid portion is less likely to interfere with the removal of the contents.

[0013] The main portion, side portions, strap, and lid portion may be integrally molded from resin, which allows the cap to be manufactured more cheaply than, for example, a case in which the lid portion is provided on the main portion. Effect of the Invention

[0014] Advantageous Effects of Invention According to one aspect of the present invention, it is possible to provide a cap for a paper container that can ensure airtightness without preventing removal of the contents. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1(a) is a schematic diagram showing a paper container to which a cap according to this embodiment is attached, and FIG. 1(b) is a schematic enlarged view of a main part of the paper container. [Diagram 2] 2(a) and (b) are schematic perspective views of the cap according to this embodiment. [Diagram 3] 3(a) and (b) are schematic side views of the cap according to this embodiment. [Figure 4] FIG. 4 is a schematic perspective view of the cap according to the present embodiment as viewed from the bottom side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a preferred embodiment of one aspect of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same elements or elements having the same functions will be denoted by the same reference numerals, and duplicated descriptions will be omitted.

[0017] <Paper container> The paper container described below is a molded product for containing various solid contents (e.g., food and drink, medicine, cosmetics, chemicals, electronic devices, tools, stationery, etc.). In this embodiment, dried spaghetti, a type of dried noodles, is contained as the content. The dried spaghetti is, for example, a rod-shaped or tubular molded product having a thickness of 2.5 mm or less. The paper container is, for example, a container to which an identification mark for paper container packaging is attached based on the Resource Effective Utilization Promotion Law of Japan. That is, the main component of the paper container according to this embodiment is paper, and, for example, the mass of paper is 51% or more of the total mass of the paper container. The paper container can have required performance (e.g., gas barrier property, light blocking property, water resistance, temperature and humidity resistance, mechanical strength, printability, printability, ease of decoration, etc.). Gas barrier property means the performance of preventing or suppressing the permeation of gases such as oxygen and water vapor. Water resistance is evaluated by the strength reduction rate when the paper container gets wet. Printability is evaluated based on the number of pinholes, insect holes, etc. in the printed portion. For example, the higher the printability, the fewer the number of pinholes, etc. in the printed portion, and therefore the color development of that portion tends to be high.

[0018] With reference to Figs. 1(a) and (b), the shape of a paper container to which a cap according to this embodiment is attached will be briefly described. Fig. 1(a) is a schematic diagram showing a paper container to which a cap according to this embodiment is attached. Fig. 1(b) is a schematic enlarged diagram of a main part of the paper container. As shown in Figs. 1(a) and (b), a paper container 100 to which a cap 1 is attached is a molded product having a substantially rectangular parallelepiped shape. The paper container 100 is formed by folding a paper of a predetermined shape, for example, using an adhesive or the like. The paper container 100 has a first end 101, a plurality of faces 102 to 105, and a second end 106 that is point-symmetrical with respect to the first end 101 through the center of the paper container 100. In the following description, the direction in which the first end 101 and the second end 106 face each other is defined as a first direction X, the direction perpendicular to the first direction X is defined as a second direction Y, and the direction perpendicular to the first direction X and the second direction Y is defined as a third direction Z. Furthermore, the direction toward the first end 101 in the first direction X may be referred to as the upward direction, and the direction toward the second end 106 in the first direction X may be referred to as the downward direction.

[0019] The first end 101 is a portion that is completely covered when the cap 1 is attached to the paper container 100. In this embodiment, the first end 101 is a surface having a substantially rectangular shape and is composed of one or more pieces of paper. The longitudinal direction of the first end 101 corresponds to the second direction Y, and the lateral direction of the first end 101 corresponds to the third direction Z. The first end 101 is provided with a discharge port 110 that is substantially rectangular when viewed from the first direction X. The discharge port 110 is a through hole formed by removing a part of the first end 101. In this embodiment, the discharge port 110 is adjusted to a size that allows a predetermined amount of dried spaghetti, which is the content, to be taken out at one time. In other words, the discharge port 110 has a measuring function for the content. The discharge port 110 is provided by removing a part 101e of the first end 101. In the first end 101, a fragile part 101f such as a perforation is provided at the boundary between the part 101e and the other part. Therefore, a user of the paper container 100 can easily separate the part 101e of the first end 101 from the other parts along the fragile part 101f by pressing the part 101e of the first end 101 with, for example, a finger. Note that in this specification, even when the discharge outlet 110 is blocked by the part 101e of the first end 101, the first end 101 is considered to have the discharge outlet 110.

[0020] Each of the faces 102 to 105 is a side surface that connects the first end 101 and the second end 106 of the paper container 100, and has a substantially rectangular shape. A part of each of the faces 102 to 105 is covered when the cap 1 is attached to the paper container 100. The face 102 stands downward along the edge 101a of the first end 101, the face 103 stands downward along the edge 101b of the first end 101, the face 104 stands downward along the edge 101c of the first end 101, and the face 105 stands downward along the edge 101d of the first end 101. Each of the faces 102 to 105 stands along the first direction X. Therefore, the first direction X corresponds to the standing direction of the faces 102 to 105. A part of each of the faces 102 to 105 may be formed to be removable. In this case, the removed portion is removed with the inside sealed with, for example, a film. For example, when the central portion of the surface 103 is removed, the inside of the central portion is sealed with a transparent plastic film. This allows the contents to be easily viewed without destroying the paper container 100 while maintaining the shape and airtightness of the paper container 100.

[0021] The second end 106 is a back surface that is exposed when the cap 1 is attached to the paper container 100, and has a substantially rectangular shape. Similar to the first end 101, the second end 106 is made up of one or more pieces of paper.

[0022] <Cap> 2(a) and (b) are schematic perspective views of the cap according to the present embodiment. FIG. 3(a) and (b) are schematic side views of the cap according to the present embodiment. FIG. 4 is a schematic perspective view of the cap according to the present embodiment as viewed from the bottom side. The cap 1 shown in FIG. 2 to FIG. 4 is a component that prevents the contents contained in the paper container 100 from unintentionally leaking out, and is, for example, a resin molded product having elasticity and flexibility. The cap 1 is formed, for example, by a press molding device, an injection molding device, a 3D printer, or the like. The resin constituting the cap 1 includes, for example, silicone resin, elastomer resin, urethane resin, and the like. In terms of water repellency, heat resistance, cold resistance, weather resistance, and the like, in this embodiment, silicone resin is used as the resin. The Shore A hardness of the resin measured according to the contents of JIS K 6253-3:2012 (or ISO 48) is, for example, 30° or more and 80° or less. In this case, the cap 1 is easily attached to the paper container 100, and the cap 1 is less likely to fall off the paper container 100. From the viewpoint of effectively preventing the cap 1 from falling off the paper container 100, the Shore A hardness of the resin is preferably 60° or more and 70° or less.

[0023] The cap 1 includes a main portion 3, a cylindrical side portion 2, a strap 4, and a lid portion 5. In this embodiment, the main portion 3, the side portion 2, the strap 4, and the lid portion 5 are integrally molded with each other using resin. Note that Figs. 2(a) and 3(a) show a state in which the lid portion 5 is closed, and Figs. 2(b), 3(b), and 4 show a state in which the lid portion 5 is open.

[0024] The main portion 3 is a plate-like portion that covers the first end portion 101 when the cap 1 is attached to the paper container 100, and has a substantially rectangular parallelepiped shape. Below, each component of the cap 1 will be described assuming that the longitudinal direction of the main portion 3 corresponds to the second direction Y, the lateral direction of the main portion 3 corresponds to the third direction Z, and the thickness direction of the main portion 3 corresponds to the first direction X. The main portion 3 has an opening 11 extending in the first direction X, and a frame-like portion 12 protruding along the edge of the opening 11.

[0025] The opening 11 is a portion that overlaps with the discharge outlet 110 when the cap 1 is attached to the paper container 100, and is a through hole that extends along the first direction X. The opening 11 is a portion that is closed by the lid portion 5. In this embodiment, when the cap 1 is attached to the paper container 100, the opening 11 has a substantially rectangular shape that almost completely overlaps with the discharge outlet 110 when viewed from the first direction X. The frame-shaped portion 12 is a portion that reinforces the edge of the opening 11, and has a substantially rectangular frame shape. The frame-shaped portion 12 protrudes outward from the main portion 3 along the first direction X. The inner peripheral surface of the opening 11 and the inner peripheral surface of the frame-shaped portion 12 are aligned with each other, but are not limited to this.

[0026] The side portion 2 is a cylindrical portion that covers a part of each of the surfaces 102 to 105 when the cap 1 is attached to the paper container 100. The side portion 2 has a square cylindrical shape that stands downward along the edge 3a of the main portion 3. The side portion 2 stands along the first direction X. Therefore, the first direction X corresponds to the standing direction of the side portion 2. The side portion 2 has a pair of first portions 21 and 22 that face each other along the second direction Y, and a pair of second portions 23 and 24 that face each other along the third direction Z. When the cap 1 is attached to the paper container 100, the first portion 21 faces the surface 102, the first portion 22 faces the surface 104, the second portion 23 faces the surface 103, and the second portion 24 faces the surface 105.

[0027] When the cap 1 is attached to the paper container 100, at least a part of each of the first parts 21 and 22 and at least a part of each of the second parts 23 and 24 are in close contact with the paper container 100. This makes it difficult for the cap 1 and the paper container 100 to be easily separated. The tensile strength of the cap 1 and the paper container 100 along the first direction X is, for example, 5 N or more. In this case, when the paper container 100 to which the cap 1 is attached is placed so that the first end 101 is located downward (i.e., when the paper container 100 to which the cap 1 is attached is turned upside down), the cap 1 is unlikely to slip off the paper container 100 due to its own weight. The tensile strength may be 10 N or more. In this case, even when the paper container 100 to which the cap 1 is attached is turned upside down and the paper container 100 is vibrated, the cap 1 is unlikely to slip off the paper container 100 due to its own weight. Note that the first portions 21, 22 and the second portions 23, 24 do not necessarily have to be in constant contact with the paper container 100. For example, when the paper container 100 is deformed due to a decrease in the contents or the like, either the first portions 21, 22 or the second portions 23, 24 may be separated from each other. From the viewpoint of improving the contact between the cap 1 and the paper container 100, for example, a roughening treatment may be performed on the inner peripheral surface of the side portion 2.

[0028] The second portion 23 has a protruding portion 25 (first protruding portion) that protrudes away from the main portion 3 (i.e., downward) along the first direction X. The protruding portion 25 is a portion that comes into close contact with the paper container 100 when the cap 1 is attached to the paper container 100, and has at least one of elasticity and flexibility. The protruding portion 25 is located, for example, in the central region of the second portion 23 in the second direction Y, and constitutes a part of the tip 23a of the second portion 23. The protruding portion 25 has, for example, an arc shape when viewed from the third direction Z. The protruding amount of the protruding portion 25 along the first direction X is, for example, 2% to 30% of the dimension of the second portion 23 along the first direction X, and is at least 1 mm. In addition, the dimension of the protruding portion 25 along the second direction Y is, for example, 10% to 80% of the dimension of the second portion 23 along the second direction Y. In this case, the protruding portion 25 can be formed into a shape that is easy to pick up while ensuring the strength of the protruding portion 25. The protruding portion 25 may be located in a region different from the central region of the second portion 23 in the second direction Y. The shape of the protruding portion 25 is not limited to an arc shape as long as it can be bent to a degree that allows a finger to be placed on it. In this embodiment, the second portion 24 has a protruding portion 26 similar to the second portion 23.

[0029] The strap 4 is a band-shaped connection part that connects the side part 2 and the lid part 5, and is flexible. The strap 4 contacts the tip 21a of the first part 21 of the side part 2 and extends from the outer circumferential surface of the side part 2 (the surface of the first part 21). When the lid part 5 covers the opening 11, the strap 4 connected to the lid part 5 is supported by the main part 3. In the following, the state of the strap 4 when the lid part 5 covers the opening 11 and is supported by the main part 3 is referred to as a fixed state. On the other hand, the state of the strap 4 when the lid part 5 does not cover the opening 11 and is not supported by the main part 3 or the like is referred to as a free state.

[0030] In this embodiment, the strap 4 is located outside the outer circumferential surface of the side portion 2 in a free state. More specifically, the strap 4 in a free state is located outside the first portion 21 in the second direction Y. Therefore, in this embodiment, as shown in Figs. 2(a) and (b), the center C of the main portion 3, the opening 11, and the strap 4 are arranged in order along the second direction Y (predetermined direction) as viewed from the first direction X. In other words, the strap 4 is located outside the center C and the opening 11 in the second direction Y. The length of the strap 4 from the tip 21a to the lid portion 5 is greater than the sum of the length L1 from the edge 3a of the main portion 3 to the tip 21a as viewed from the second direction Y and the length L2 from the edge 3a to the opening 11 as viewed from the first direction X. For example, the length of the strap 4 is 1.5 times or more and 5.0 times or less than the sum of the lengths L1 and L2. As a result, when the lid portion 5 covers the opening 11, a part of the strap 4 is in a bent state. Furthermore, even if the paper container 100 with the cap 1 attached is turned upside down with the opening 11 closed by the lid portion 5, the weight of the strap 4 and the lid portion 5 makes it difficult for the lid portion 5 to unintentionally fall off from the opening 11. The length of the strap 4 is preferably 1.5 to 3.5 times the sum of the lengths L1 and L2. In this embodiment, when the lid portion 5 closes the opening 11, the strap 4 is curved so as to protrude outward in the second direction Y, and forms an arc when viewed from the third direction Z.

[0031] The strap 4 has a base end portion 41 connected to the first portion 21 of the side portion 2, and a main body portion 42 extending from the base end portion 41 to the lid portion 5. The base end portion 41 is a portion that connects the side portion 2 and the main body portion 42, and supports the main body portion 42 and the lid portion 5 when the cap 1 is placed so that the main portion 3 faces downward, for example. The main body portion 42 is a strip-shaped portion that represents most of the strap 4. The length of the base end portion 41 along the first direction X (hereinafter, the thickness of the base end portion 41) is greater than the length of the main body portion 42 along the first direction X (hereinafter, the thickness of the main body portion 42). In addition, the length of the base end portion 41 along the third direction Z (hereinafter, the width of the base end portion 41) is greater than the length of the main body portion 42 along the third direction Z (hereinafter, the width of the main body portion 42). Therefore, the base end portion 41 is less likely to deform than the main body portion 42. In addition, the tip 21a of the first portion 21 included in the side portion 2, the lower surface of the base portion 41, and the lower surface of the main body portion 42 form a smooth surface that is continuous with each other. On the other hand, the upper surface of the base portion 41 is gradually positioned upward as it approaches the side portion 2 from the main body portion 42. Also, as viewed from the first direction X, the base portion 41 gradually widens as it approaches the side portion 2 from the main body portion 42. Therefore, the width and thickness of the base portion 41 are larger closer to the side portion 2. As a result, as shown in FIG. 4, for example, the strap 4 is less likely to hang down as a whole, and the strap 4 hangs down so that the main body portion 42 and the lid portion 5 do not overlap the opening 11 in the first direction X. As a specific example, the main body portion 42 of the strap 4 is curved so that the lid portion 5 is away from the main portion 3 and the side portion 2 in the first direction X and the second direction Y.

[0032] The lid portion 5 is a portion for blocking the opening 11 from the outside (lid portion for blocking the opening), and is detachable from the opening 11. When the cap 1 is attached to the paper container 100, the lid portion 5 blocks the opening 11, thereby ensuring the hermeticity of the cap 1 with respect to the paper container 100. In addition, by removing the lid portion 5 from the opening 11, the contents can be removed while the cap 1 is still attached to the paper container 100. As described above, the lid portion 5 is integrally molded with the side portion 2 and the strap 4. That is, the lid portion 5, the side portion 2, and the strap 4 are integrated with each other. Therefore, when the lid portion 5 is removed from the opening 11, the lid portion 5 does not separate from the side portion 2 via the strap 4, and therefore, the loss of the lid portion 5 can be effectively prevented.

[0033] The lid portion 5 has a main body portion 51 that covers the opening 11, a protruding portion 52 (second protruding portion) that protrudes from the main body portion 51, and a grip portion 53. The main body portion 51 is a portion that covers the opening 11 and the frame-shaped portion 12 of the main portion 3 when the lid portion 5 closes the opening 11, and has a substantially rectangular plate shape. The protruding portion 52 is a portion that is inserted into the opening 11 when the lid portion 5 closes the opening 11. The protruding portion 52 has a substantially rectangular frame shape that can be fitted into at least the frame-shaped portion 12. In this embodiment, the protruding portion 52 can be fitted into not only the frame-shaped portion 12 but also the opening 11. Therefore, when the lid portion 5 closes the opening 11, the protruding portion 52 is in close contact with both the inner peripheral surface of the frame-shaped portion 12 and the inner peripheral surface of the opening 11. This makes it difficult for the lid portion 5 to unintentionally fall off the opening 11 even if the paper container 100 to which the cap 1 is attached is turned upside down. When the lid part 5 closes the opening 11, the tip of the protruding part 52 is flush with the bottom surface of the main part 3. The grip part 53 is used when removing the lid part 5 from the opening 11, and is located on the opposite side of the strap 4 with the main part 51 interposed therebetween.

[0034] According to the cap 1 for the paper container 100 according to the present embodiment described above, the main part 3 that covers the first end 101 of the paper container 100 when attached to the paper container 100 provided with the discharge port 110 has an opening 11 that overlaps with the discharge port 110. This allows the contents of the paper container 100 to be easily taken out through the discharge port and the opening even when the cap 1 is attached to the paper container 100. The cap 1 is also provided with a strap 4 that contacts the tip of the side part 2, extends from the outer circumferential surface of the side part 2, and is located outside the outer circumferential surface in a free state, and a lid part 5 for closing the opening 11, and the center C of the main part 3, the opening 11, and the strap 4 are arranged in this order along the second direction Y as viewed from the first direction X. This allows the lid part 5 to hang down so as to be separated significantly from the opening 11 when the paper container 100 is tilted to take out the contents with the discharge port 110 and the opening 11 facing downward. This makes it less likely that the lid part 5 will interfere when taking out the contents. Therefore, even when the cap 1 is attached to the paper container 100, the contents of the paper container 100 can be easily removed while preventing obstruction by the lid part 5. Furthermore, by using the lid part 5, the airtightness of the paper container 100 can be ensured when resealing, etc. Therefore, by using the cap 1 according to this embodiment, it is possible to ensure airtightness without obstructing removal of the contents.

[0035] In this embodiment, the side portion 2 has a first portion 21 that connects to the strap 4 and a second portion 23 that comes into close contact with the paper container 100 when the cap 1 is attached to the paper container 100, and the second portion 23 has a protruding portion 25 that protrudes away from the main portion 3 along the first direction X. Therefore, the protruding portion 25 included in the second portion 23 exerts a function of preventing the cap 1 from falling off from the paper container 100. In addition, by using the protruding portion 25 as a knob, the cap 1 can be easily removed from the paper container 100 while preventing damage to main parts of the cap 1, such as the lid portion 5.

[0036] In this embodiment, when the cap 1 is attached to the paper container 100, the opening 11 almost completely overlaps with the discharge outlet 110 when viewed from the first direction X. This effectively prevents problems with dispensing the contents using the cap 1. In addition, in this embodiment, the discharge outlet 110 is adjusted to a size that allows a predetermined amount of the contents, i.e., dried spaghetti, to be dispensed at one time. This allows the opening 11 to effectively take over the measuring function of the discharge outlet 110.

[0037] In this embodiment, the main part 3 has a frame-shaped part 12 that protrudes along the edge of the opening 11, and the lid part 5 has a protruding part 52 that can fit into the frame-shaped part 12. This makes it possible to ensure good airtightness of the paper container 100.

[0038] In this embodiment, when the lid portion 5 covers the opening 11, the strap 4 curves so as to protrude outward in the second direction Y. This makes it possible to limit the arrangement method of the paper containers 100 to which the cap 1 is attached. Alternatively, for example, if the paper container 100 to which the cap 1 is attached is arranged so that the strap 4 is located at the top, it becomes difficult to arrange another paper container or the like on the paper container 100. Therefore, by attaching the cap 1, it becomes easier for the user to consider the arrangement of the paper container 100, which contributes to the efficiency of the storage space.

[0039] In this embodiment, the strap 4 has a base end portion 41 that connects to the side portion 2 and a main body portion 42 that extends from the base end portion 41 to the lid portion 5, and the width and thickness of the base end portion 41 are greater than the width and thickness of the main body portion 42. This makes it possible to suppress damage at the boundary between the side portion 2 and the strap 4. In addition, the provision of the base end portion 41 makes it difficult for the entire lid portion 5 to sag. As a result, even when the paper container 100 with the cap 1 attached is turned upside down to remove the contents, the lid portion 5 is less likely to interfere when removing the contents.

[0040] In this embodiment, the main portion 3, the side portion 2, the strap 4, and the lid portion 5 are integrally molded with resin. Therefore, the cap 1 can be manufactured more inexpensively than, for example, a case in which the lid portion 5 is provided on the main portion 3.

[0041] The cap for a paper container according to one aspect of the present invention is not limited to the above embodiment. For example, in the above embodiment, the paper container has a substantially rectangular parallelepiped shape, but is not limited thereto. For example, the paper container may be a polygonal prism shape, a cylindrical shape, or an elliptical cylindrical shape. When the paper container is a cylindrical shape, an elliptical cylindrical shape, or the like, the surface erected along the edge of the first end portion is one. In addition, the main part of the cap and the like are appropriately modified according to the shape of the paper container.

[0042] In the above embodiment, the solid content is a rod-shaped or tubular molded object, but is not limited thereto. For example, the content may be a powder or a piece. In these cases, the outlet of the paper container does not need to have a measuring function for the content.

[0043] In the above embodiment, the outlet of the paper container has a measuring function for the contents, but is not limited thereto. For example, the opening of the cap may have a measuring function for a specific content. In this case, the measuring function is achieved by completely overlapping the opening of the cap with the outlet of the paper container. Also, when the opening of the cap has the measuring function, the opening does not have to almost completely overlap with the outlet. When removing the contents from the paper container with the cap attached, the entire surface of the paper container facing the main part of the cap may be removed in advance. In this case, the first end is formed by the edge of the surface located on the opposite side of the second end in the first direction, for example.

[0044] In the above embodiment, the outlet is provided by removing a part of the first end, but this is not limited thereto. For example, the outlet may be provided by removing a part of the surface portion in addition to the part of the first end. In this case, for example, a fragile part or the like may be provided in the part of the surface portion.

[0045] In the above embodiment, when the lid closes the opening, the tip of the protruding portion is aligned with the bottom surface of the main portion, but this is not limited thereto. When the lid closes the opening, the tip of the protruding portion may be located closer to the second end than the first end, or may be located inside the opening. Also, in the above embodiment, when the lid closes the opening, the protruding portion of the lid is inserted into the opening, but this is not limited thereto. For example, the protruding portion does not have to be inserted into the opening. In this case, the protruding portion may be in close contact with the outer peripheral surface of a frame-shaped portion provided on the edge of the opening. At this time, the protruding portion may be hooked onto the outer peripheral surface. [Explanation of symbols]

[0046] 1... Cap, 2... Side part, 3... Main part, 3a... Edge, 4... Strap, 5... Lid, 11... Opening, 12... Frame-shaped part, 21, 22... First part, 21a, 23a... Tip, 23, 24... Second part, 25, 26... Protruding part (first protruding part), 41... Base end part, 42... Main body part, 51... Main body part, 52... Projecting part (second projecting part), 53... Knob part, 100... Paper container, 101... First end (end), 102 to 105... Surface, 106... Second end, 110... Outlet, C... Center.

Claims

1. A cap for a paper container having an end portion at which a discharge port is provided and one or more surfaces extending along an edge of the end portion, a plate-shaped main portion that covers the end portion when the cap is attached to the paper container; an opening provided in the main portion and overlapping with the outlet when the cap is attached to the paper container; A cylindrical side portion standing along an edge of the main portion; a strap contacting a tip of the side portion and extending from an outer circumferential surface of the side portion; A lid portion for closing the opening portion provided on the strap; Equipped with The strap is located outside the outer circumferential surface in a free state, When viewed from the standing direction of the side portion, the center of the main portion, the opening, and the strap are arranged in order along the longitudinal direction of the main portion. cap.

2. A cap for a paper container having an end portion at which a discharge port is provided and one or more surfaces erected along an edge of the end portion, a plate-shaped main portion that covers the end portion when the cap is attached to the paper container; an opening provided in the main portion and overlapping with the outlet when the cap is attached to the paper container; A cylindrical side portion standing along an edge of the main portion; a strap contacting a tip of the side portion and extending from an outer circumferential surface of the side portion; A lid portion for closing the opening portion provided on the strap; Equipped with The strap is located outside the outer circumferential surface in a free state, When viewed from the standing direction of the side portion, the center of the main portion, the opening, and the strap are arranged in order along a predetermined direction, The side portion has a first portion that connects to the strap and a second portion that comes into close contact with the paper container when the cap is attached to the paper container, The second portion has a first protruding portion protruding away from the main portion along the erection direction.

3. The cap according to claim 1 or 2, wherein when the cap is attached to the paper container, the opening portion substantially completely overlaps with the discharge port when viewed from the upright direction.

4. The main portion has a frame-shaped portion protruding along an edge of the opening, The cap according to any one of claims 1 to 3, wherein the lid portion has a second protruding portion that can be fitted into the frame-shaped portion.

5. The cap according to claim 1 or claim 3 or claim 4 depending on claim 1, wherein the strap is curved so as to protrude outward relative to the longitudinal direction when the lid portion is covering the opening.

6. The strap has a base portion connected to the side portion and a main portion extending from the base portion to the lid portion, The cap of any one of claims 1 to 5, wherein the width and thickness of the base portion are greater than the width and thickness of the body portion.

7. The cap according to any one of claims 1 to 6, wherein the main portion, the side portions, the strap, and the lid portion are integrally formed with each other from resin.

8. The side portion has a first portion connected to the strap and a second portion that fits closely to the paper container when the cap is attached to the paper container, A cap as described in claim 1 or any one of claims 3 to 7 dependent on claim 1, wherein the second portion has a first protruding portion that protrudes away from the main portion along the erection direction.

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