container

Abstract

To provide a container capable of completing engagement of a container body with a sleeve, only by bringing down the container body toward the sleeve while being placed onto the sleeve on a work table.SOLUTION: The container comprises a plastic container body 1, and a sleeve 2 made of paper, that is outwardly engaged with a trunk part 13 of the container body 1. A container lower end portion 111 of the plastic container body 1 is made to be at a position higher than a sleeve lower end portion 232 of the sleeve 2 made of paper, that is outwardly engaged with the trunk part 13 of the container body 1.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a container having a plastic container body and a paper sleeve. [Background technology]

[0002] Hot liquids such as hot coffee are sometimes poured into containers to be served. Instant foods such as instant noodles or soups can be made edible by pouring boiling water into the containers. The contents of the container can also be heated in a microwave oven. When food or drink in a container is heated, the heat of the food or drink is transferred to the eater's hands through the container, making it difficult to hold the container.

[0003] Therefore, a paper sleeve is sometimes attached to the container body. The paper sleeve has a high insulating effect. By holding the container body through this highly insulating sleeve, heat is not directly transferred to the hand. In order to increase the insulating effect of the sleeve, it is important to create an air layer between the container body and the sleeve. Therefore, the sleeve creates an air layer between the container body and the sleeve by using cardboard, embossed paper, or other shapes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-168345 A [Patent Document 2] Patent No. 5320347 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] In recent years, the use of plastics, which are chemically stable and therefore difficult to biodegrade, has become an environmental issue, and there is a demand for a reduction in the amount of plastic used in the container body. Therefore, it is conceivable to make the container body thinner and reduce the amount of plastic by fitting a paper sleeve around the container body to supplement the strength of the container body. In this case, the food and drink contained in the container body is not limited to heated food and drink.

[0006] However, paper is more expensive than plastic, and the overall cost of the container is high. This prevents the widespread use of containers with a paper sleeve fitted around the container body. In other words, if the cost can be reduced by mass-producing containers, containers with a paper sleeve fitted around the container body will be more widely used, and the plastic problem can be addressed.

[0007] One methodology for achieving mass production is the simplification of the work. For example, a method can be considered in which a sleeve that is opened into a ring shape is placed on a workbench, and the container body is lowered from above and fitted into the workbench. This method is a simple work because the sleeve is immovable, and only the container body is lowered. In addition, when it is necessary to align the orientation of the sleeve and the container body, the sleeve is at least immovable, so there is less risk of the sleeve and the container body becoming misaligned, and in many cases it is not necessary to position the sleeve and the container body, making the work even simpler.

[0008] However, in the general appearance of the container, the sleeve is fitted onto the middle area of ​​the container body, and the upper and lower parts of the container body are exposed from the sleeve. In this case, the container body can only be inserted into the sleeve until it lands on the workbench and the lower ends of the container body and the sleeve are flush with each other, and the sleeve cannot be raised to a height where it can be in close contact with the container body. Therefore, although this method is simple, it cannot be adopted.

[0009] A method can be considered in which the container is placed upside down on the workbench and a sleeve that opens annularly from above is lowered. With this method, the sleeve can be fitted until it is in close contact with the container body. However, until the step of putting food or drink in the container and sealing it with a film, the container is upright. At the stage of attaching the sleeve, the container body must be turned upside down, and an extra operation or device for inverting the container body is required. Furthermore, due to the inversion of the container body, the orientation of the container body and the sleeve may be misaligned, and there are many cases where alignment is required. Therefore, although this method itself is simple, other methods must be added to make this simple method work, and as a whole, it does not become a simple operation.

[0010] The present invention has been proposed to solve the problems of the prior art as described above, and its object is to provide a container in which the fitting of the container body and the sleeve can be completed only by lowering the container body toward the sleeve while the sleeve is placed on the workbench.

Means for Solving the Problems

[0011] To achieve the above object, a container according to an embodiment of the present invention includes a plastic container body and a paper sleeve externally fitted to the body of the container, and the lower end of the container of the container body is at a position higher than the lower end of the sleeve of the sleeve externally fitted to the body of the container body.

[0012] Based on the same circumferential length portion of the container body and the sleeve, the height direction distance from the same circumferential length portion of the sleeve to the lower end of the sleeve may be made longer than the height direction distance from the same circumferential length portion of the container body to the lower end of the container.

[0013] The container body is arranged at circumferentially equal positions along the circumferential direction of the body portion, has a plurality of protrusions protruding outward from the body portion, the sleeve has a plurality of holes opening at the same interval as the arrangement interval of the protrusions, and the protrusions may enter into the holes.

[0014] A height direction distance from a lower edge of the hole to a lower end of the sleeve may be longer than a height direction distance from the protrusion to the lower end of the container.

[0015] The container body may have a truncated pyramidal tubular portion in the trunk portion with container side vertical ridges aligned along the circumference, the sleeve may form a truncated pyramidal tubular ring having the same number of sleeve side vertical ridges as the container side vertical ridges, and the hole portion may extend across two of the sleeve side vertical ridges and have a slit portion formed by expanding the hole portion in the height direction at a position corresponding to the crossed sleeve side vertical ridges.

[0016] The hole of the sleeve may be configured so that the slit portion is engaged with the container-side vertical ridge line and the upper edge of the hole is abutted against the protrusion.

[0017] The container body may have an enlarged diameter step in the barrel portion that is connected to the upper side of the truncated pyramidal tubular portion and is enlarged in diameter more than the upper end of the truncated pyramidal tubular portion, the enlarged diameter step being enlarged in diameter more than the length from the axial center of the container body to the protrusion, and the sleeve may have an inclination angle that narrows downward from the lower end of the outer circumferential surface of the enlarged diameter step toward the protrusion, with the upper end of the sleeve fitting into and tightly fitting into the enlarged diameter step.

[0018] The height direction distance from the protrusion to the enlarged diameter step may be such that the circumference of the sleeve at a position above the upper edge of the hole of the sleeve is the same as the circumference of the enlarged diameter step.

[0019] The container body may have an annular protrusion extending endlessly around the body in a circumferential direction and protruding outward from the body, the annular protrusion stretching and expanding the sleeve from the inside.

[0020] The container body may have an annular protrusion extending endlessly around the body in a circumferential direction and protruding outward from the body, the protrusion protruding from a peripheral surface of the annular protrusion. Effect of the Invention

[0021] According to the present invention, the sleeve can be mechanically fitted onto the container body simply by placing the sleeve on a workbench and then lowering and pushing the container body into place, enabling inexpensive mass production. [Brief description of the drawings]

[0022] [Figure 1] FIG. [Diagram 2] 1 is a cross-sectional view taken along a direction in which the diameter of the container body increases. [Diagram 3] FIG. [Figure 4] 11 is a cross-sectional view taken along a direction in which the diameter of the sleeve expands. FIG. [Diagram 5] FIG. 4 is a cross-sectional view showing the dimensions of the container body and the sleeve. [Figure 6] FIG. 2 is a schematic diagram showing one process of manufacturing a container. [Figure 7] 4 is a schematic diagram showing a state in which a sleeve is fitted onto a container body. FIG. [Figure 8] FIG. [Figure 9] 13 is an enlarged view of the state in which the lower edge of the hole of the container and the protrusion are in contact with each other. FIG. [Figure 10] 13 is an enlarged view of the state in which the upper edge of the hole of the container and the protrusion are in contact with each other. FIG. [Figure 11] FIG. 13 is a schematic diagram showing the difference between the presence and absence of a slit portion. [Figure 12] FIG. 11 is a side view of a container body according to a modified example. [Figure 13] 13 is a cross-sectional view taken along a direction in which the diameter of a container body of a modified example increases. FIG. [Figure 14] 1 is a cross-sectional view of a container body and a sleeve cut in the vertical direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The container according to the embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, thickness, dimensions, positional relationship, ratio, shape, etc. may be emphasized for ease of understanding, but the present invention is not limited to such emphasis. Hereinafter, the bottom side of the container body will be referred to as the lower side or the lower side, and the opening side will be referred to as the upper side or the upper side.

[0024] (Container body) 1 is a side view of a container body 1. The container body 1 is manufactured by sheet molding using plastic as the material. This container body 1 has a bottomed cylindrical shape that gradually expands in diameter toward an opening 17 at the upper end. This container body 1 includes a bottom 11 that has a container lower end 111 and closes the bottom, a body 13 that has an opening 17, and a rim 12 formed around the opening 17.

[0025] The bottom 11 has a shallow circular dish shape. The container lower end 111 is the endmost position of the container body 1 on the bottom 11 side, and is the point that comes into contact with the placement surface when the container body 1 is placed. The body 13 extends endlessly along the dish edge of the bottom 11 and rises from the dish edge of the bottom 11. The body 13 gradually expands in diameter overall toward the opening 17. The rim 12 extends endlessly along the upper peripheral edge of the body 13 and expands radially outward in the radial direction of the container body 1 to form an annular shape.

[0026] This container body 1 contains food and drink in an internal space defined by bottom 11 and body 13. After food and drink are poured into opening 17, a film (not shown) is attached to rim 12 by thermal adhesion or the like to prevent foreign matter such as dust or paper powder from entering container body 1 and to prevent food and drink from spilling out. When eating or drinking, the film is peeled off rim 12, and the eater takes out the food and drink from opening 17.

[0027] The body 13 mainly comprises a truncated pyramidal tubular section 14. The body 13 further comprises an expanded diameter step 15. The expanded diameter step 15 is formed directly above the truncated pyramidal tubular section 14, continuing from the upper end 143 of the truncated pyramidal tubular section 14. The truncated pyramidal tubular section 14 and the expanded diameter step 15 have a cylindrical or annular shape with openings on both ends, and are seamlessly connected by sheet molding, so that the container body 1 forms a single storage space that penetrates from the opening 17 to the bottom 11.

[0028] The truncated pyramidal tubular portion 14 is a region of the body 13 having a polygonal ring-shaped cross section. The truncated pyramidal tubular portion 14 expands linearly from the bottom 11 toward the opening 17, and expands at the same inclination angle around the entire circumference. The truncated pyramidal tubular portion 14 is formed by a plurality of container-side vertical ridgelines 142 and a plurality of trapezoidal side surfaces 141. The container-side vertical ridgeline 142 runs vertically, connecting the upper end 143 and the lower end 144 in a straight line. The container-side vertical ridgeline 142 is disposed at equal intervals along the circumference of the body 13. The imaginary extension lines of the container-side vertical ridgeline 142 intersect at the center directly below the truncated pyramidal tubular portion 14. The trapezoidal side surface 141 expands in width along the circumferential direction from the bottom 11 toward the opening 17. The trapezoidal side surface 141 is connected with each container-side vertical ridge line 142 as a common side, and continues around the circumference of the truncated pyramidal cylindrical portion 14 .

[0029] The container side vertical ridge 142 is the hypotenuse of the truncated pyramidal tubular portion 14. The trapezoidal side surface 141 is the pyramidal surface of the truncated pyramidal tubular portion 14. For example, the truncated pyramidal tubular portion 14 has a regular dodecagonal pyramid shape. The twelve container side vertical ridges 142 are arranged at intervals of a central angle of 30°, and the twelve trapezoidal side surfaces 141 have isosceles trapezoid shapes and are joined together at an interior angle of 150° to form a ring. Each trapezoidal side surface 141 has a slight bend that convexly protrudes radially inward of the container body 1, and is formed as a gentle arc surface.

[0030] The enlarged diameter step 15 is directly connected to the upper end 143 of the truncated pyramidal tubular portion 14. The enlarged diameter step 15 is a region that is enlarged so as to rise one step larger than the upper end 143, which is the maximum diameter part of the truncated pyramidal tubular portion 14. The enlarged diameter step 15 is located at the top of the body portion 13, and the upper end of the enlarged diameter step 15 becomes an opening 17, and a rim 12 is formed at the upper end of the enlarged diameter step 15. The enlarged diameter step 15 has a shape in which a cylindrical portion 151 and a truncated cone portion 152 are stacked. The diameter of the cylindrical portion 151 does not change depending on the height. The diameter of the truncated cone portion 152 gradually decreases toward the opening 17. The diameter of the cylindrical portion 151 and the diameter of the lower end of the truncated cone portion 152 are the same, and the cylindrical portion 151 and the truncated cone portion 152 are smoothly connected without any steps.

[0031] A plurality of protrusions 16 are formed at the lower end 144 of the truncated pyramidal cylindrical portion 14, i.e., at the boundary with the bottom portion 11. FIG. 2 is a cross-sectional view taken along the direction in which the diameter increases, directly above the protrusions 16. As shown in FIGS. 1 and 2, the multiple protrusions 16 are lined up at equally spaced positions around the circumference of the body portion 13. The protrusions 16 are lined up at the same height. The protrusions 16 protrude radially outward from the container body 1.

[0032] Moreover, this protrusion 16 is long along the circumferential direction of the container body 1. However, it is contained within the trapezoidal side surface 141 and does not reach the container-side vertical ridge line 142. From the viewpoint of the strength of the sleeve 2 described later, the protrusions 16 are not arranged continuously on the adjacent trapezoidal side surfaces 141. In other words, the protrusions 16 are not formed on the trapezoidal side surfaces 141 on both sides of the trapezoidal side surface 141 on which the protrusions 16 are formed. For example, in the truncated pyramidal tubular portion 14 having a regular dodecagonal truncated pyramid shape, the protrusions 16 are arranged on every other trapezoidal side surface 141, and the four protrusions 16 are arranged at 90-degree intervals.

[0033] (sleeve) 3 is a side view of the sleeve 2. The sleeve 2 is manufactured by folding paper. The sleeve 2 is made of double-sided corrugated cardboard with a liner sheet attached to both sides of a corrugated sheet, or a single-sided corrugated cardboard with a liner sheet attached to one side of a corrugated sheet. The sleeve 2 is a ring in the shape of a truncated pyramid cylinder with both ends open, and the diameter of the sleeve 2 expands linearly from the sleeve lower end 232 to the sleeve upper end 231.

[0034] The sleeve lower end 232 is the end position of the narrowed side of the sleeve 2, and is the part that comes into contact with the placement surface when the sleeve 2 is placed with the narrowed side facing down. The sleeve upper end 231 is the end position of the widened side of the sleeve 2, and is the part that comes into contact with the placement surface when the sleeve 2 is placed upside down. The edge that forms the sleeve upper end 231 extends on the same plane perpendicular to the axis of the sleeve 2 over one circumference. The edge that forms the sleeve lower end 232 also extends on the same plane perpendicular to the axis of the sleeve 2 over one circumference. In other words, the sleeve lower end 232 and the sleeve upper end 231 are flat over one circumference, and have no recesses or bulges.

[0035] The sleeve 2 is formed by a plurality of sleeve-side vertical ridges 22 and a plurality of trapezoidal side surfaces 21. The sleeve-side vertical ridges 22 run vertically in a straight line connecting the sleeve lower end 232 and the sleeve upper end 231. The sleeve-side vertical ridges 22 are disposed at equal intervals along the circumference of the sleeve 2. Imaginary extensions of the sleeve-side vertical ridges 22 intersect at the center directly below the pyramidal tubular portion 14. The width of each trapezoidal side surface 21 along the circumferential direction increases from the sleeve lower end 232 toward the sleeve upper end 231. The trapezoidal side surfaces 21 are connected to each other with the sleeve-side vertical ridges 22 as a common side, and continue around the circumference of the sleeve 2.

[0036] The sleeve-side vertical ridges 22 are the hypotenuses of the sleeve 2. The trapezoidal side surfaces 21 are the pyramidal surfaces of the sleeve 2. The number of sleeve-side vertical ridges 22 is the same as the container-side vertical ridges 142 of the container body 1. The number of trapezoidal side surfaces 21 of the sleeve 2 is the same as the trapezoidal side surfaces 141 of the container body 1. For example, when the truncated pyramidal tubular portion 14 has a regular truncated dodecagonal pyramid shape, the sleeve 2 has a regular truncated dodecagonal pyramid shape. The 12 line segments of the sleeve-side vertical ridges 22 are arranged at intervals of a central angle of 30°, and the 12 trapezoidal side surfaces 21 having an isosceles trapezoid shape are butted together at an interior angle of 150° to form a ring.

[0037] A plurality of holes 25 are formed in the peripheral surface of the sleeve 2. Fig. 4 is a cross-sectional view taken along the direction in which the diameter of the sleeve 2 expands at the position of each hole 25. As shown in Figs. 3 and 4, the holes 25 are long along the peripheral direction of the sleeve 2. The holes 25 are arranged at equal circumferential positions at the same height along the circumference of the sleeve 2.

[0038] The hole 25 is formed on the trapezoidal side surface 21. However, the hole 25 does not fit into one of the trapezoidal side surfaces 21, but extends across two sleeve-side vertical ridges 22 that sandwich the trapezoidal side surface 21 in which the hole 25 is formed. From the viewpoint of the strength of the sleeve 2, the hole 25 is not continuously arranged on the adjacent trapezoidal side surfaces 21. In other words, the hole 25 is not formed on the trapezoidal side surfaces 21 on both sides of the trapezoidal side surface 21 on which the hole 25 is formed, except for the portions that cross the sleeve-side vertical ridges 22.

[0039] As shown in FIG. 3, the hole 25 has a slit 26 at a position where the hole 25 intersects with the sleeve-side vertical ridge 22. Here, the upper and lower edges that define the hole 25 and extend in the circumferential direction are referred to as an upper edge 251 and a lower edge 252. The slit 26 is cut out upward at both ends of the upper edge 251 and at a position where it intersects with the sleeve-side vertical ridge 22. The slit 26 is a triangular cutout that narrows upward and has one of its vertices located on the sleeve-side vertical ridge 22. Due to the slit 26, both ends of the upper edge 251 are not connected to the sleeve-side vertical ridge 22, are discontinuous with the sleeve-side vertical ridge 22, and are interrupted from the sleeve-side vertical ridge 22.

[0040] (size) The number of holes 25 is the same as the number of protrusions 16 of the container body 1. The spacing between holes 25 is the same as the spacing between protrusions 16 of the container body 1. The circumferential length of holes 25 is equal to or greater than the length of protrusions 16 formed on the container body 1. An upper edge 251 and a lower edge 252 that define the top and bottom of hole 25 extend in the circumferential direction in accordance with the extension of protrusions 16. The distance between the upper edge 251 and the lower edge 252 is equal to or greater than the thickness of protrusions 16 in the height direction. However, when the upper edge 251 of hole 25 and the upper edge 161 of protrusion 16 are aligned, the gap between the lower edge 162 of protrusion 16 and the lower edge 252 of hole 25 is slight, about 1 mm or less.

[0041] 5(a) is a partial cross-sectional view of the container body 1, and Fig. 5(b) is a partial cross-sectional view of the sleeve 2. The edge distance R251 from the central axis of the sleeve 2 to the upper edge 251 of the hole 25 is equal to or greater than the edge distance R161S from the central axis of the container body 1 to the protruding root of the upper edge 161 of the protrusion 16, and is equal to or less than the edge distance R161E from the central axis of the container body 1 to the protruding end of the upper edge 161 of the protrusion 16. Therefore, the protrusion 16 and the upper edge 251 of the hole 25 prevent the sleeve 2 from falling off the container body 1.

[0042] Furthermore, the cylindrical portion 151 of the diameter expansion step 15 is located at a height distance D15 from the upper edge 161 of the protrusion 16. The radial distance from the central axis of the container body 1 to the cylindrical portion 151 is defined as radial distance R151. At this time, at a position that is the height distance D15 above the upper edge 251 of the hole 25 of the sleeve 2, the distance from the central axis of the sleeve 2 to the circumferential surface is radial distance R151.

[0043] That is, the container body 1 and the sleeve 2 have the same circumferential point. A position that is the same distance up from the upper edge 251 of the hole 25 as the height direction distance from the upper edge 161 of the projection 16 to the cylindrical portion 151 is the sleeve-side same circumferential point 27, which has the same circumferential length as the cylindrical portion 151 of the enlarged diameter step 15. In other words, the cylindrical portion 151 of the enlarged diameter step 15 is the container-side same circumferential point 18, which has the same circumferential length as the sleeve-side same circumferential point 27.

[0044] In addition, the height direction distance D27 from the sleeve-side same circumferential point 27 with the cylindrical portion 151 in the sleeve 2 to the sleeve lower end 232 of the sleeve 2 is longer than the height direction distance D111 from the container-side same circumferential point 18, which is the cylindrical portion 151, to the container lower end 111 of the container body 1 over the entire circumference. Therefore, when the sleeve 2 is fitted onto the container body 1 so that the sleeve-side same circumferential point 27 and the container-side same circumferential point 18 are in close contact with each other, the container lower end 111 is located higher than the sleeve lower end 232 over the entire circumference, and a space remains between the container lower end 111 and the sleeve lower end 232.

[0045] Moreover, the side-center distance R252 from the central axis of the sleeve 2 to the lower edge 252 of the hole 25 is equal to or greater than the side-center distance R162S from the central axis of the container body 1 to the protruding root of the lower edge 162 of the protrusion 16, and is equal to or less than the side-center distance R16E from the central axis of the container body 1 to the protruding end of the lower edge 162 of the protrusion 16. Furthermore, the height direction distance D252 from the lower edge 252 of the hole 25 to the sleeve lower end 232 is longer than the height direction distance D162 from the lower edge 162 of the protrusion 16 to the container lower end 111. Therefore, the protrusion 16 and the lower edge 252 of the hole 25 prevent the container body 1 from being inserted too deeply from above the sleeve 2, which would cause the sleeve 2 to be destroyed.

[0046] Furthermore, the height direction distance D2 from the sleeve upper end 231 to the sleeve lower end 232 of the sleeve 2, i.e., the total height of the sleeve 2, is longer than the height direction distance D12 from the rim 12 to the container lower end 111. Therefore, when the sleeve 2 is fitted onto the rim 12 so as to be hooked onto it, the container lower end 111 is located higher than the sleeve lower end 232, and a space remains between the container lower end 111 and the sleeve lower end 232.

[0047] The diameter expansion step 15 is a region that is expanded so as to rise up one step. Therefore, the inclination angle of the sleeve 2 is steeper than the container side vertical ridge 142, and approaches the protrusion 16 at a large angle while decreasing in diameter.

[0048] (Assembly) As shown in Fig. 6, the sleeve 2 is placed on the workbench 3 with the lower end 232 of the sleeve facing downwards. The workbench 3 is the flat stage or the upper surface of the conveyor inside the factory. The container body 1 is arranged above the sleeve 2, with the lower end 111 of the container body facing the sleeve 2, and the container body 1 is lowered into the ring of the sleeve 2. Then, the container body 1 is inserted into the sleeve 2 from the side of the lower end 111 of the container body through the upper end 231 of the sleeve.

[0049] As shown in Fig. 7, when the body part 13 passes through the sleeve 2, the protrusion 16 of the container body 1 temporarily expands the upper region above the upper edge 251 of the hole 25 from the inside and enters the hole 25. The position that is D15 higher in the height direction from the upper edge 251 of the hole 5 to the cylindrical part 151 of the protrusion 16 is the same-circumference part 27 on the sleeve side with the same circumference as the cylindrical part 151 of the diameter-expanding step part 15. Therefore, when the protrusion 16 enters the hole 25, the cylindrical part 151 of the diameter-expanding step part 15 starts to contact the inner peripheral surface of the sleeve 2. Then, as the container body 1 further progresses inside the sleeve 2, the inner peripheral surface of the same-circumference part 27 on the sleeve side deforms to approach a circular shape following the cylindrical part 151 and adheres closely to the diameter-expanding step part 15. Furthermore, the restoring force attempting to return from the deformation of the same-circumference part 27 on the sleeve side tightens the diameter-expanding step part 15, and the sleeve 2 and the container body 1 adhere strongly.

[0050] When the protrusion 16 enters the hole 25 and the same-circumference part 27 on the sleeve side of the sleeve 2 adheres closely to the diameter-expanding step part 15, which is the same-circumference part 18 on the container side, the fitting of the container body 1 and the sleeve 2 is completed. At this time, the height-direction distance D27 from the same-circumference part 27 on the sleeve side to the lower end 232 of the sleeve is longer than the height-direction distance D111 from the diameter-expanding step part 15, which is the same-circumference part 27 on the sleeve side, to the lower end 111 of the container. Therefore, as shown in Fig. 8, the lower end 111 of the container is at a higher position than the lower end 232 of the sleeve and stops further progress. A space remains from the lower end 111 of the container to the lower end 232 of the sleeve.

[0051] The sleeve-side uniform circumferential portion 27 deforms to fit the enlarged diameter step 15 and adheres to it, providing resistance to the progress of the container body 1 in the sleeve 2. However, the magnitude of this resistance varies from one container to another. Therefore, as shown in FIG. 9, if the container body 1 is pushed too far into the sleeve 2, the lower edge 252 of the hole 25 hits the protrusion 16, preventing the container body 1 from progressing further in the sleeve 2. The height direction distance D252 from the lower edge 252 to the sleeve lower end 232 is longer than the height direction distance D162 from the lower edge 162 of the protrusion 16 to the container lower end 111. Therefore, as shown in FIG. 9, the container lower end 111 stops progressing further at a position higher than the sleeve lower end 232. A space remains between the container lower end 111 and the sleeve lower end 232.

[0052] That is, even if the sleeve 2 is placed and the container body 1 is pushed in from above, the engagement between the container body 1 and the sleeve 2 is completed before the container lower end 111 of the container body 1 reaches the work table 3. Therefore, the worker or the device only needs to hold the container body 1 and push in the sleeve 2 on the work table 3 while keeping it stationary. Also, the sleeve 2 side is stationary during this engagement operation, and there are many cases where it is not necessary to position the container side vertical ridge 142 of the container body 1 and the sleeve side vertical ridge 22 of the sleeve 2, compared to the case where the worker or the device holds both the container body 1 and the sleeve 2. In this way, the container formed of this container body 1 and sleeve 2 allows the engagement between the container body 1 and the sleeve 2 to be a simple operation, and mass production of containers is possible.

[0053] In addition, the abutment between the lower edge 252 of the hole 25 and the protrusion 16 reduces the risk of the container body 1 destroying the sleeve 2 and progressing, improving yields and increasing production efficiency, enabling further mass production of containers.

[0054] The height direction distance D12 from the rim 12 to the container lower end 111 is shorter than the height direction distance D2 which is the total height of the sleeve 2 from the sleeve upper end 231 to the sleeve lower end 232. Therefore, even if the sleeve 2 is placed and the container body 1 is pushed in from above, the engagement between the container body 1 and the sleeve 2 is completed before the container lower end 111 of the container body 1 reaches the workbench 3. Therefore, the sleeve 2 may be fitted onto the container body 1 by abutting the sleeve upper end 231 of the sleeve 2 against the rim 12 of the container body 1.

[0055] When the sleeve 2 is fitted onto the container body 1, the protrusion 16 enters the hole 25. Therefore, as shown in Fig. 10, even if the sleeve 2 tries to fall off, the upper edge 251 of the hole 25 is caught by the protrusion 16, and the sleeve 2 cannot fall off from the container body 1.

[0056] Here, Fig. 11(a) is a schematic diagram showing a case where a sleeve 2 without a slit portion 26 is fitted into a container body 1. As shown in Fig. 11(a), since the sleeve 2 is made of paper, the radius of curvature of the sleeve-side vertical ridge 22 is larger than that of the container-side vertical ridge 142 of the container body 1. In addition, since the upper region of the upper edge 251 of the hole 25 has been expanded once by the protrusion 16, the radius of curvature of the sleeve-side vertical ridge 22 is likely to become even larger. In other words, the sleeve 2 has a bulge 221 centered on the sleeve-side vertical ridge 22.

[0057] If there is no slit portion 26, this bulge 221 reaches the upper edge 251 of the hole 25. Therefore, the upper edge 251 of the hole 25 bulges outward in the radial direction of the sleeve 2. If the bulge 221 is excessively large, most of the side of the upper edge 251 will come off the protrusion 16, and the sleeve 2 will easily fall off the container body 1.

[0058] On the other hand, (b) of Fig. 11 is a schematic diagram showing a case where the sleeve 2 of this embodiment having a slit portion 26 is fitted into the container body 1. As shown in (b) of Fig. 11, this sleeve 2 has a slit portion 26 on the sleeve-side vertical ridge 22. The slit portion 26 is cut out with the sleeve-side vertical ridge 22 as its center. In other words, the portion cut out by the slit portion 26 is the source of a bulge 221 centered on the sleeve-side vertical ridge 22. In addition, the slit portion 26 disconnects the sleeve-side vertical ridge 22, which is the center of the bulge 221, from the upper edge 251 of the hole portion 25.

[0059] Therefore, the bulge 221 centered on the sleeve-side vertical ridge line 22 does not reach the upper edge 251 of the hole 25, and the upper edge 251 of the hole 25 is prevented from expanding radially outward. Therefore, the upper edge 251 of the hole 25 is caught by the protrusion 16.

[0060] Furthermore, the inclination angle of the sleeve 2 is steeper than that of the container-side vertical ridge 142. Therefore, the slit portion 26 bites into the container-side vertical ridge 142, and the upper edge 251 of the hole 25 is caught near the base of the protrusion 16 while being in close contact with the trapezoidal side surface 141. Even if the bulge centered on the sleeve-side vertical ridge 22 extends to the upper edge 251 of the hole 25 to some extent, the upper edge 251 of the hole 25 is contained within the range of the protrusion 16.

[0061] Moreover, each trapezoidal side surface 141 of the truncated pyramidal tubular portion 14 has a slight curvature that convexly extends radially inward of the container body 1, and is formed as a gentle arc surface. That is, the depth of the protrusion 16 is increased. Therefore, even if the bulge centered on the sleeve-side vertical ridge line 22 extends to the lower end side portion 242 to some extent, the upper edge 251 of the hole 25 is still contained within the range of the protrusion 16.

[0062] (Action and effect) As described above, this container comprises a plastic container body 1 and a paper sleeve 2 fitted onto the body 13 of the container body 1. The container lower end 111 of the container body 1 is located higher than the sleeve lower end 232 of the sleeve 2 fitted onto the body 13 of the container body 1. This makes it possible to fit the sleeve 2 onto the body 13 of the container body 1 by the simple task of placing the sleeve 2 on the workbench 3 and inserting the container body 1 from above, thereby improving the production efficiency of the container and reducing production costs.

[0063] In order to position the container bottom end 111 higher than the sleeve bottom end 232, the dimensions may be designed based on the container-side same circumferential point 18 of the container body 1 and the sleeve-side same circumferential point 27 of the sleeve 2 so that the height direction distance D27 from the sleeve-side same circumferential point 27 to the sleeve bottom end 232 is longer than the height direction distance D111 from the container-side same circumferential point 18 to the container bottom end 111. The container-side same circumferential point 18 and the sleeve-side same circumferential point 27 are an example of points that face each other when the sleeve 2 is fitted onto the trunk portion 13 of the container body 1.

[0064] For example, when the rim 12 and the upper end 231 of the sleeve are butted against each other, the height direction distance D2 of the sleeve 2 may be longer than the height direction distance D12 of the container body 1. In this way, the lengths to the lower ends of both may be designed based on the points that face each other when the external fitting is completed.

[0065] Furthermore, the container body 1 has a plurality of protrusions 16 arranged at equal circumferential positions along the circumferential direction of the body 13 and protruding outward from the body 13, and the sleeve 2 has a plurality of holes 25 that open at the same intervals as the protrusions 16 are arranged, and the protrusions 16 are inserted into the holes 25. As a result, the upper edges 251 of the holes 25 are caught by the protrusions 16, preventing the sleeve 2 from falling off the container body 1.

[0066] Furthermore, the height direction distance D252 from the lower edge 252 of the hole 25 to the sleeve lower end 232 is longer than the height direction distance D162 from the protrusion 16 to the container lower end 111. This prevents the container body 1 from landing on the workbench 3 before the lower edge 252 of the hole 25 is caught by the protrusion 16. This allows for a simple operation of placing the sleeve 2 on the workbench 3 and inserting the container body 1 from above, improving the production efficiency of the container. In addition, the lower edge 252 of the hole 25 is caught by the protrusion 16, preventing the container body 1 from proceeding any further inside the sleeve 2, reducing the risk of damaging the sleeve 2 by inserting the container body 1 from above.

[0067] The container body 1 has a truncated pyramidal tubular portion 14 in the trunk portion 13, with container-side vertical ridgelines 142 aligned along the circumference, and the sleeve 2 forms a ring in the shape of a truncated pyramidal tubular portion having the same number of sleeve-side vertical ridgelines 22 as the container-side vertical ridgelines 142. The hole portion 25 extends across the two sleeve-side vertical ridgelines 22, and has a slit portion 26 formed by expanding the hole portion 25 in the height direction at a position corresponding to the crossed sleeve-side vertical ridgelines 22.

[0068] As a result, the sleeve-side vertical ridge 22, which is the center of the bulge 221, is cut out by the slit portion 26, and the sleeve-side vertical ridge 22, which is the center of the bulge 221, is disconnected from the upper edge 251 of the hole 25. Therefore, the bulge 221 centered on the sleeve-side vertical ridge 22 does not reach the upper edge 251 of the hole 25, and the upper edge 251 of the hole 25 is prevented from expanding radially outward. Therefore, the upper edge 251 of the hole 25 is caught by the protrusion 16, and the sleeve 2 is less likely to fall off the container body 1 due to the catch between the protrusion 16 and the hole 25.

[0069] The container body 1 is also provided with an enlarged diameter step 15 in the body 13, which is connected to the upper side of the truncated pyramidal tubular portion 14 and has a larger diameter than the upper end 143 of the truncated pyramidal tubular portion 14. The enlarged diameter step 15 is larger in diameter than the protrusion 16. The sleeve 2 has an inclination angle that reduces in diameter downward from the lower end of the outer circumferential surface of the enlarged diameter step 15 toward the protrusion 16. This makes the inclination angle of the sleeve 2 steeper than the container-side vertical ridge 142. Therefore, the slit portion 26 bites into the container-side vertical ridge 142, and the upper edge 251 of the hole portion 25 is seated in close contact with the base of the protrusion 16. Therefore, even if the bulge 221 centered on the sleeve-side vertical ridge 22 extends to the upper edge 251 to some extent, the risk of falling off is reduced.

[0070] In order to seat the upper edge 251 of the hole 25 on the protrusion 16, the slit 26 is not limited to a triangular shape. For example, the slit 26 may be an inverted triangular shape, a rectangular shape, or an arc shape such as a semicircle or a semiellipse.

[0071] (Modification) Fig. 12 is a side view of the container body 1 of the modified example, and Fig. 13 is a cross-sectional view along the direction in which the diameter of the container body 1 of the modified example increases. As shown in Figs. 12 and 13, the body 13 of the container body 1 may have a truncated cone tubular portion 14a that gradually increases in diameter from an upper end 143 to a lower end 144, instead of the truncated pyramidal tubular portion 14. Also, the protrusion 16 that fits into the hole 25 may not be provided, and if the protrusion 16 is not provided, the hole 25 is not necessary for the sleeve 2. The lower end 144 of the truncated cone tubular portion 14a, i.e., the boundary with the bottom 11, is provided with an annular protrusion 19 instead of the protrusion 16.

[0072] The annular protrusion 19 extends endlessly around the body portion 13 for one full circle. The annular protrusion 19 extends while maintaining the same height. The annular protrusion 19 bulges outward in the radial direction from the outer surface of the body portion 13 with the same length for one full circle. Also, the annular protrusion 19 has the same thickness in the vertical direction for one full circle. And the outer peripheral length of the annular protrusion 19 is longer than the circumference of the inscribed circle that inscribes the sleeve 2 at the position facing the annular protrusion 19 when the sleeve 2 is externally fitted to the container body 1, and is the same as or slightly shorter than the circumference of the sleeve 2 at the position facing the annular protrusion 19.

[0073] FIG. 14 is a cross-sectional view of the container body 1 having the frustum-shaped cylindrical portion 14a with the sleeve 2 fitted thereto, cut along the vertical direction of the container body 1 and the sleeve 2. As shown in FIG. 14, the sleeve 2 is expanded by the annular protrusion 19 and clamps the annular protrusion 19 by the restoring force that tries to return to its original shape. Therefore, the sleeve 2 and the annular protrusion 19 are in strong close contact. When the restoring force of the sleeve 2 is strong, the annular protrusion 19 bites into the sleeve 2. By this close contact between the sleeve 2 and the annular protrusion 19 or the biting of the annular protrusion 19 into the sleeve 2, it is possible to prevent the sleeve 2 from falling off the container body 1.

[0074] In addition, small protrusions may be intermittently arranged along the circumferential direction on the outer peripheral surface of the annular protrusion 19. The small protrusions are likely to bite into the sleeve 2, and it is possible to prevent the sleeve 2 from falling off the container body 1. The shape of the small protrusions may bulge in any shape such as a hemispherical shape or a pyramid shape, or may extend in any shape such as an elliptical shape or a rounded rectangular shape in the circumferential direction, or there may be a plurality of types of shapes, extension lengths, and protrusion lengths.

[0075] Furthermore, a protrusion 16 that fits into a hole 25 of the sleeve 2 may be formed on the circumferential surface of the annular protrusion 19. This reduces the risk of the sleeve 2 being damaged due to the protrusion 16 getting caught in the hole 25, and further prevents the sleeve 2 from falling off the container body 1 due to the protrusion 16 getting caught in the hole 25 and the close contact between the sleeve 2 and the annular protrusion 19, or the annular protrusion 19 biting into the sleeve 2. [Explanation of symbols]

[0076] 1 Container body 11 Bottom 111 Lower end of container 12 Mouth rim 13 Torso 14 Pyramid-shaped tubular section 14a Cone-shaped cylindrical section 141 Trapezoidal side 142 Container side vertical ridge 143 Top 144 Bottom end 15 Expanded diameter step 151 Cylinder 152 Cone truncated part 16 Protrusion 161 Upper edge 162 Lower edge 17 Aperture 18 Container side, same circumference 19 Annular protrusion 2 Sleeve 21 Trapezoidal side 22 Sleeve side vertical ridge 221 Bulge 231 Sleeve upper end 232 Sleeve bottom end 25 Hole 251 Upper edge 252 Lower edge 26 Slit section 27 Sleeve side same circumference location 3 Workbench

Claims

1. A plastic container body; A paper sleeve fitted onto the body of the container body; Equipped with a lower end of the container body is located higher than a lower end of the sleeve that is fitted onto the barrel of the container body; The container body has a plurality of protrusions that are disposed at equally spaced positions along the circumferential direction of the body portion and protrude outward from the body portion, the sleeve has a plurality of holes that open at the same intervals as the arrangement intervals of the protrusions, the protrusion is inserted into the hole; A container characterized by:

2. Based on a circumferential point of the container body and the sleeve, the height direction distance from the circumferential point of the sleeve to the lower end of the sleeve is longer than the height direction distance from the circumferential point of the container body to the lower end of the container; 2. The container according to claim 1,

3. A height direction distance from a lower edge of the hole to a lower end of the sleeve is longer than a height direction distance from the protrusion to a lower end of the container; 3. The container according to claim 1 or 2,

4. The container body has a truncated pyramidal cylindrical portion in the body portion, the truncated pyramidal cylindrical portion having a container-side vertical ridge line aligned along a circumference, The sleeve forms a ring having a truncated pyramidal cylindrical shape having the same number of sleeve-side vertical ridges as the container-side vertical ridges, The hole portion is Extending across the two sleeve-side longitudinal ridges, a slit portion formed by expanding the hole portion in a height direction at a position corresponding to the crossed longitudinal ridge line on the sleeve side; 4. A container according to any one of claims 1 to 3, characterized in that

5. the hole of the sleeve is configured such that the slit portion is engaged with the container-side vertical ridge line and an upper edge of the hole is brought into contact with the protrusion portion; 5. The container according to claim 4,

6. The container body includes: The body portion has an enlarged diameter step portion that is connected to the upper side of the truncated pyramidal cylindrical portion and has a larger diameter than the upper end of the truncated pyramidal cylindrical portion, The diameter of the expanded step portion is expanded beyond the length from the axial center of the container body to the protrusion portion, The sleeve is The upper end of the sleeve fits into the enlarged diameter step portion and is in close contact with the enlarged diameter step portion. The enlarged diameter step has an inclination angle that narrows downward from the lower end of the outer circumferential surface of the enlarged diameter step toward the protrusion.

6. The container according to claim 4 or 5,

7. The height direction distance from the protrusion to the enlarged diameter step is the same as the circumferential length of the sleeve at a position above the upper edge of the hole of the sleeve, and the circumferential length of the enlarged diameter step is the same as the circumferential length of the enlarged diameter step; 7. The container according to claim 6,

8. The container body has an annular protrusion that extends endlessly around the body in a circumferential direction and protrudes outward from the body, The annular protrusion stretches and expands the sleeve from the inside, 3. The container according to claim 1 or 2,

9. The container body has an annular protrusion that extends endlessly around the body in a circumferential direction and protrudes outward from the body, The protrusion protrudes from a peripheral surface of the annular protrusion.

8. A container according to any one of claims 1 to 7, characterized in that

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