CN110446663B

CN110446663B - Plastic container

Info

Publication number: CN110446663B
Application number: CN201880019003.6A
Authority: CN
Inventors: 野口裕雄; 森田浩幸; 泷正美; 仲宗根启太; 小垣美津子; 藤原普夫
Original assignee: Toppan Printing Co Ltd
Current assignee: Toppan Inc
Priority date: 2017-03-23
Filing date: 2018-03-22
Publication date: 2021-10-26
Anticipated expiration: 2038-03-22
Also published as: WO2018174165A1; CN110446663A; JP7065826B2; KR20190133149A; JPWO2018174165A1

Abstract

A plastic container (1) is provided with an upper container (10) and a lower container (20). The upper container (10) has a substantially rectangular upper wall (11) and a pair of upper short-side outer walls (12) extending downward in a substantially vertical direction from the vicinity of both ends of the upper wall (11). The lower container (20) has a substantially rectangular bottom wall (21) and a pair of lower short-side outer walls (22) extending upward in a substantially vertical direction from the vicinity of both ends of the bottom wall (21). The upper short-side outer wall (12) is provided with wedge-shaped projections (16) located at positions corresponding to the four corners of the rectangle, and the lower short-side outer wall (22) is provided with recesses (26) located at positions corresponding to the four corners of the rectangle and into which the wedge-shaped projections (16) are fitted. The wedge-shaped protrusions (16) are fitted into the recesses (26), so that the upper container (10) and the lower container (20) are mounted in the plastic container (1) so as not to be removable.

Description

Plastic container

Technical Field

The present invention relates to a plastic container.

Background

Patent document 1 discloses 1 example of a plastic container including an upper container and a lower container.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 2013-079090

Disclosure of Invention

Problems to be solved by the invention

In some cases, the plastic container is formed by simply fitting the upper container and the lower container on the side surfaces thereof, and the upper container and the lower container may be fitted to and removed from each other by dropping the container. In order to prevent the engagement and disengagement of the containers, a plurality of pins protruding toward one of the upper container and the lower container are provided in the other container, a plurality of cylindrical portions into which the pins are inserted are provided in the other container, and both the pins and the cylindrical portions are engaged with each other in the container, thereby firmly engaging the upper container and the lower container. However, when the upper container and the lower container are manufactured by injection molding or the like, if the pin and the tube portion are provided on the surface (back surface) inside the container, the shape of the outer surface (front surface) of the container may be disturbed by sink marks or the like at the time of injection molding, and the appearance thereof may be impaired. Particularly in the present day times when the requirements for the appearance (aesthetic appearance) of packaging containers are becoming stringent, the requirements are becoming more stringent and further improvements are desired.

The invention aims to provide a plastic container which enables an upper container and a lower container to be firmly embedded and does not damage the appearance of the container.

Means for solving the problems

The present invention, as one aspect thereof, relates to a plastic container. The plastic container includes an upper container and a lower container. The upper container has a substantially rectangular upper wall and a pair of upper short-side outer walls extending from the vicinity of both ends of the upper wall in a substantially vertical direction. The lower container has a substantially rectangular bottom wall and a pair of lower short-side outer walls extending in a substantially vertical direction from the vicinity of both ends of the bottom wall. One outer wall of the upper short-side outer wall and the lower short-side outer wall is provided with wedge-shaped protrusions located at positions corresponding to the four corners of the rectangle and protruding toward the other outer wall, and the other outer wall of the upper short-side outer wall and the lower short-side outer wall is provided with recesses located at positions corresponding to the four corners of the rectangle and into which the wedge-shaped protrusions are fitted. The upper container and the lower container are mounted so as not to be able to be pulled out by the engagement of the wedge-shaped protrusion and the recess.

In this plastic container, wedge-shaped projections are provided on one outer wall at positions corresponding to the substantially rectangular four corners, and recesses are provided on the other outer wall at positions corresponding to the substantially rectangular four corners, into which the wedge-shaped projections are fitted. The upper container and the lower container are mounted so as not to be able to be pulled out by the wedge-shaped projections and the recesses being fitted at four corners. Therefore, the upper container and the lower container can be firmly fitted to each other. Further, since the wedge-shaped projection and the recess are provided on the outer wall, it is not necessary to provide a fitting portion on the upper wall or the like, and the appearance of the container, particularly the surface of the container, can be prevented from being impaired.

In the above plastic container, preferably, the outer surface of the upper short-side outer wall is provided with a wedge-shaped protrusion, and the inner surface of the lower short-side outer wall is provided with a recess. In this case, it is possible to provide a plastic container that can securely fit the upper container and the lower container and does not impair the aesthetic appearance of the container.

In the above plastic container, preferably, the wedge-shaped projection is provided at a lower end of the upper short-side outer wall, and the recess is provided at a lower end of the lower short-side outer wall. In this case, it is possible to provide a plastic container that can securely fit the upper container and the lower container and does not impair the aesthetic appearance of the container.

In the above plastic container, it is preferable that a guide recess for guiding the wedge-shaped protrusion to the recess is provided at an upper end of the lower short-side outer wall. In this case, it is possible to provide a plastic container that can securely fit the upper container and the lower container and does not impair the aesthetic appearance of the container. Further, since the guide recess is provided, the work for fitting the upper container to the lower container can be performed more reliably.

In the above plastic container, it is preferable that the outer surface of the upper short-side outer wall is provided with a groove portion extending in the lateral direction, and the inner surface of the lower short-side outer wall is provided with a linear protrusion extending in the lateral direction. Preferably, the upper container and the lower container are temporarily fixable when the linear protrusion engages with the groove portion before fitting. In this case, it is possible to provide a plastic container that can securely fit the upper container and the lower container and does not impair the aesthetic appearance of the container. Further, since the groove portion of the upper short-side outer wall and the linear projection of the lower short-side outer wall are used, when the linear projection is engaged with the groove portion before fitting, the upper container and the lower container can be temporarily fixed, and therefore, positioning of both can be performed, and the work for fitting the upper container to the lower container can be performed more reliably.

In the above plastic container, preferably, the lower container has a pair of lower short-side inner walls extending in a substantially vertical direction from a portion of the bottom wall inside the lower short-side outer wall, and the lower short-side inner walls are lower in height than the lower short-side outer walls. Preferably, the upper container and the lower container are mounted so as not to be able to be pulled out by the upper short-side outer wall being located between the lower short-side outer wall and the lower short-side inner wall and the wedge-shaped projection being fitted in the recess. In this case, it is possible to provide a plastic container that can securely fit the upper container and the lower container and does not impair the aesthetic appearance of the container. Further, since the inner wall is also used, the upper container and the lower container can be further firmly fitted to each other. The lower container may have a reinforcing rib between the lower short-side outer wall and the lower short-side inner wall. In this case, the lower short-side outer wall or the lower short-side inner wall can be prevented from being deflected inward by shrinkage during molding, and the outer walls can be maintained in an upright state. This prevents a problem when the upper container is mounted to the lower container with the upper short-side outer wall positioned between the lower short-side outer wall and the lower short-side inner wall.

In the above plastic container, it is preferable that the upper container has a pair of upper long-side outer walls extending in a substantially vertical direction from the vicinity of both sides of the upper wall, and a pair of upper long-side inner walls extending in a substantially vertical direction from portions of the upper wall inside the upper long-side outer walls. Preferably, the lower container has a pair of lower long-side outer walls extending in a substantially vertical direction from the vicinity of both sides of the bottom wall, and a pair of lower long-side inner walls extending in a substantially vertical direction from portions of the bottom wall inside the lower long-side outer walls. Preferably, the upper long-side outer wall and the lower long-side outer wall are provided with linear protrusions protruding toward each other, respectively, and the upper container and the lower container are attached so as not to be removable by the lower long-side outer wall being positioned between the upper long-side outer wall and the upper long-side inner wall and the linear protrusions of the upper long-side outer wall being fitted with the linear protrusions of the lower long-side outer wall. In this case, the fitting between the upper container and the lower container can be further stabilized by fitting the long-side inner wall and the long-side outer wall as well as the short-side inner wall. In addition, a plastic container that does not impair the aesthetic appearance of the container can be provided.

In the above plastic container, it is preferable that the bottom wall is provided with a take-out structure including a take-out port for taking out the stored material, and a lid body which covers the take-out port and is openable and closable. Preferably, the lid has a fixing portion for fixing the lid to the outlet structure of the bottom wall, a push-down portion for pushing down, and a lid portion for covering the outlet, the fixing portion is provided on one side of the push-down portion via a first hinge, the lid portion is provided on the other side of the push-down portion via a second hinge, and the lid portion is rotatable from the closed position to the open position about the second hinge as an axis when the push-down portion is pushed down. With this configuration, the stored material stored in the plastic container, for example, food such as chewing gum or candy, can be easily taken out. Further, a projection or the like may be provided on the back surface side of the depressed portion of the lid body, a hole portion into which the projection is engaged may be provided on the inner surface of the lower container, and when the lid body is changed from the closed position to the open position, the projection may be engaged with the hole portion to maintain the open position of the lid body. In this case, the stored material stored in the plastic container can be more easily taken out.

In addition, as another aspect, the present invention relates to a plastic container. The plastic container includes an upper container and a lower container. The upper container has a substantially rectangular upper wall and a pair of upper short-side outer walls extending from the vicinity of both ends of the upper wall in a substantially vertical direction. The lower container has a substantially rectangular bottom wall and a pair of lower short-side outer walls extending in a substantially vertical direction from the vicinity of both ends of the bottom wall. The bottom wall is provided with a take-out structure including a take-out port through which the stored material is taken out, and a lid body that covers the take-out port and can be opened and closed. The lid body has a fixing portion for fixing the lid body to the outlet structure of the bottom wall, a push-down portion for pushing down, and a lid portion for covering the outlet. A fixing portion is connected to one side of the pressing portion via a first hinge, and a lid portion is provided to the other side of the pressing portion via a second hinge. In this plastic container, when the push-down portion is pushed down, the lid body can be rotated from the closed position to the open position about the second hinge as an axis.

In this plastic container, a dispensing opening structure and a lid are provided in a bottom wall, and the lid has a fixing portion for fixing to the bottom wall, a pushing portion for pushing operation, and a lid portion for covering the dispensing opening. The fixing portion is connected to one side of the pressing portion via a first hinge, the lid portion is provided to the other side of the pressing portion via a second hinge, and the lid portion is rotatable from the closed position to the open position about the second hinge when the pressing portion is pressed. This makes it possible to easily take out the contents stored in the plastic container, for example, food such as chewing gum or candy. Further, since the outlet is provided on the bottom wall side, the design of the plastic container on the front surface side can be freely selected, and a beautiful appearance shape can be formed.

In the above plastic container, it is preferable that an engaging projection is provided on an inner surface side of the push-down portion, and an engaging hole with which the engaging projection engages is provided in the outlet structure. Preferably, when the lid is in the open state, the engaging projection engages with the engaging hole to fix the movement of the lid in the open position. This makes it easier to take out the container contents.

In the above plastic container, it is preferable that the outlet structure is provided with a rib for defining an opening angle of the lid. This prevents the lid from moving when the lid is in the open state, and therefore, the container can be more easily taken out of the container.

In the above plastic container, it is preferable that the outlet structure is provided with a rib for suppressing the lid from floating when the lid is in the closed position. Thus, the movement of the lid portion can be prevented when the lid portion is in the closed state, and therefore, the storage material can be prevented from accidentally coming out of the container. In addition, an extension wall portion may be provided in the outlet structure, and the extension wall portion may be configured to prevent the contents of the plastic container from entering a cavity provided on the inner side of the lower container and on the side opposite to the outlet. In this case, the stored material stored in the plastic container can be prevented from being caught in a place other than the outlet of the outlet structure. Further, it is possible to prevent the stored material from being chipped or broken due to the impact when the plastic container is dropped.

Effects of the invention

The invention provides a plastic container which can firmly embed an upper container and a lower container and does not damage the appearance of the container.

Drawings

Fig. 1 is a perspective view showing an entire plastic container according to an embodiment of the present invention.

Fig. 2 is a plan view showing the bottom wall of the plastic container shown in fig. 1.

Fig. 3 (a) is an exploded perspective view showing a part (end portion of the plastic container) of the plastic container shown in fig. 1 in an exploded state. FIG. 3 (b) is a cross-sectional view of the outer wall of the upper short side taken along line IIIb-IIIb in FIG. 3 (a). Fig. 3 (c) is a perspective view of the lower container shown in fig. 3 (a) viewed from a different direction. FIG. 3 (d) is a cross-sectional view of the outer wall of the lower long side taken along line IIId-IIId in FIG. 3 (a).

Fig. 4 (a) is a perspective view of the outlet structure on the bottom wall side of the plastic container shown in fig. 1, as viewed from the bottom surface, and fig. 4 (b) is a plan view thereof (bottom surface view).

Fig. 5 is a sectional view showing an opened state of a lid body of the plastic container shown in fig. 1.

Fig. 6 is a perspective view showing an upper container of a plastic container according to a modification.

Fig. 7 is a perspective view showing a lower container of a plastic container according to a modification.

Fig. 8 (a) and (b) are another perspective view showing a lower container of a plastic container according to a modification.

Fig. 9 is a plan view of a lower container of a plastic container according to another modification, as viewed from above.

Fig. 10 is a perspective view of the upper container attached to the lower container shown in fig. 9.

Detailed Description

Hereinafter, the plastic container of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same functions, and redundant description may be omitted.

Fig. 1 is a perspective view showing an entire plastic container according to an embodiment of the present invention. Fig. 2 is a plan view showing the bottom wall of the plastic container shown in fig. 1. As shown in fig. 1 and 2, the plastic container 1 is a container which includes an upper container 10 and a lower container 20 and has a space in which a predetermined storage material (for example, food such as chewing gum or candy) can be stored. A take-out structure 30 (see fig. 4) is provided on the back surface side (bottom wall side) of the lower container 20, and the take-out structure 31 is attached so as to be covered with a lid 40. The upper container 10 and the lower container 20 are formed in a predetermined shape by injection molding of ABS resin, for example. The lid 40 can be formed of, for example, polypropylene (PP) resin.

The upper container 10 includes a substantially rectangular upper wall 11, a pair of upper short-side outer walls 12 (see fig. 3) extending downward in the substantially vertical direction from the vicinity of both ends 11a (positions slightly inside) of the upper wall 11, a pair of upper long-side outer walls 13 extending downward in the substantially vertical direction from the vicinity of both sides 11b of the upper wall 11, and a pair of upper long-side inner walls 14 (see fig. 6) extending downward in the substantially vertical direction from the portions of the upper wall 11 inside the upper long-side outer walls 13. The upper long-side outer wall 13 is higher than the upper long-side inner wall 14, and the lower short-side outer wall 22 is separated from the upper long-side inner wall 14 by a predetermined distance. The upper long-side outer wall 13 and the upper long-side inner wall 14 are formed to extend in substantially parallel directions. In the upper container 10, a space for housing is defined by the upper wall 11, the upper short-side outer wall 12, and the upper long-side inner wall 14. Further, on the inner surface of the upper wall 11 of the upper container 10, other projections and the like are not formed except for the gate portion by injection molding (see fig. 6), and the surface thereof is formed flat. In the example shown in the figure, the outer surfaces of the upper wall 11 and the upper long-side outer wall 13 have an R-shaped (rounded) edge, but may have a right-angled edge. Further, a decorative pattern may be formed on the outer surface (upper wall 11) of the upper container 10, for example, a metallic pattern may be formed on a PET film by aluminum deposition. In this case as well, since the upper container 10 is configured to have no projection or the like on the inner surface of the upper wall 11, the surface pattern can be made beautiful.

The lower container 20 includes a substantially rectangular bottom wall 21, a pair of lower short-side outer walls 22 extending upward in the substantially vertical direction from the vicinity of both ends 21a of the bottom wall 21, a pair of lower short-side inner walls 23 extending upward in the substantially vertical direction from the vicinity of both sides 21b of the bottom wall 21 toward the inside of the lower short-side outer walls 22 (see fig. 3 c), a pair of lower long-side outer walls 24 extending upward in the substantially vertical direction from the vicinity of both sides 21b of the bottom wall 21 (see fig. 3 a and c), and a pair of lower long-side inner walls 25 extending upward in the substantially vertical direction from the vicinity of the inside of the lower long-side outer walls 24 of the bottom wall 21 (see fig. 3 a and c). The height of the lower short-side outer wall 22 is higher than the height of the lower short-side inner wall 23, and the lower short-side outer wall 22 is separated from the lower short-side inner wall 23 by a predetermined distance. The height of the lower long-side outer wall 24 is lower than the height of the lower long-side inner wall 25, and the lower long-side outer wall 24 is separated from the lower long-side inner wall 25 by a predetermined distance.

When upper container 10 and lower container 20 are fitted to each other as described later, upper short-side outer wall 12 is positioned between lower short-side outer wall 22 and lower short-side inner wall 23. The upper long-side inner wall 14 is disposed between the lower long-side outer wall 24 and the lower long-side inner wall 25.

Next, the structure for fitting upper container 10 and lower container 20 will be described in more detail with reference to (a) to (d) of fig. 3. Fig. 3 (a) is an exploded perspective view showing a part (left end portion) of the plastic container shown in fig. 1 in an exploded state. Fig. 3 (b) is a partial sectional view taken along line IIIb-IIIb in fig. 3 (a). Fig. 3 (c) is a partial perspective view of the lower container shown in fig. 3 (a) viewed from a different direction. Fig. 3 (d) is a partial sectional view taken along line IIId-IIId in fig. 3 (a).

As shown in fig. 3 (a), in the

upper container

10, 2 wedge-shaped projections 16 are provided below both ends of the outer surface of the upper short-side outer wall 12, and a total of 4 wedge-shaped projections 16 are provided on the 2 upper short-side outer walls 12. The wedge-shaped projection 16 has, for example, a flat upper surface (see fig. 3 (a) and (b)). In fig. 3 (a), only one upper short-side outer wall 12 is shown, but the other upper short-side outer wall also has the same wedge-shaped projections, and these wedge-shaped projections 16 are provided at positions corresponding to the substantially rectangular four corners of the upper wall 11. Further, 2 linear protrusions 17 are provided on the outer surface of the upper short-side outer wall 12 of the upper container 10 above the wedge-shaped protrusion 16 (see fig. 3 (a) and (b)). Fig. 3 (b) shows a cross section of the upper short-side outer wall 12, the wedge-shaped projection 16, and the linear projection 17. The linear protrusion 17 extends in the direction facing the upper long-side outer wall 13.

On the other hand, in the

lower container

20, 2 recessed portions 26 (hole portions) for fitting into the wedge-shaped protrusions 16 of the upper container 10 are provided below both ends of the inner surface of the lower short-side outer wall 22, and a total of 4 recessed portions 26 are provided in the 2 lower short-side outer walls 22. In fig. 3 (a) and (c), only one lower short-side outer wall 22 is shown, but the other lower short-side outer wall also has the same concave portions, and these concave portions 26 are provided at portions corresponding to the substantially rectangular four corners of the bottom wall 21 (see fig. 3 (c)). Further, 2 linear protrusions 27 are provided on the inner surface of the lower short-side outer wall 22 of the lower container 20 above the concave portion 26. The linear protrusions 27 extend in the opposing direction of the lower long-side outer wall 24. Fig. 3 (c) is a partial perspective view of the lower short-side outer wall 22 as viewed from the inside.

In the plastic container 1 having such a fitting structure, when the upper container 10 and the lower container 20 are attached, the upper short-side outer wall 12 of the upper container 10 is positioned between the lower short-side outer wall 22 and the lower short-side inner wall 23 of the lower container 20, the wedge-shaped protrusion 16 of the upper short-side outer wall 12 is fitted into the recess 26 of the lower short-side outer wall 22, and the linear protrusion 17 of the upper short-side outer wall 12 is fitted into the linear protrusion 27 of the inner surface of the lower short-side outer wall 22. At this time, the linear protrusion 27 is located above the linear protrusion 17 so as to be in contact therewith, and the lower short-side outer wall 22 pushes the upper short-side outer wall 12 downward. As a result, the four corners of the rectangular shape in plan view are firmly fixed, and the upper container 10 and the lower container 20 are firmly fitted to each other, so that they cannot be pulled out. At this time, the lower short-side inner wall 23 biases the upper short-side outer wall 12 toward the lower short-side outer wall 22, so that the fitting described above becomes more stable. In the plastic container 1, the lower short-side outer wall 22 of the lower container 20 is disposed outside by this fitting, and the lower short-side outer wall 22 constitutes an end face of the plastic container 1.

Further, the upper container 10 is provided with 5 linear projections 18 (see fig. 6) in the longitudinal direction below the inner surface of the upper long-side outer wall 13 in this order, and a total of 10 linear projections 18 are provided on 2 upper long-side outer walls 13. On the other hand, in the lower container 20, as shown in fig. 3 c, 5 linear protrusions 28 (1 of them is shown in fig. 3 c) are provided in this order in the substantially central portion of the outer surface of the lower long-side outer wall 24, and a total of 10 linear protrusions 28 are provided in 2 lower long-side outer walls 24.

In the plastic container 1 having such a fitting structure, when the upper container 10 and the lower container 20 are attached, the lower long-side outer wall 24 is positioned between the upper long-side outer wall 13 and the upper long-side inner wall 14, and the linear protrusion 18 of the upper long-side outer wall 13 is fitted to the linear protrusion 28 of the lower long-side outer wall 24. At this time, the linear protrusion 28 is located above the linear protrusion 18 so as to be in contact therewith, and the lower long-side outer wall 24 pushes the upper long-side outer wall 13 downward. In this way, the upper container 10 and the lower container 20 are attached to each other so as not to be able to be removed by the fitting in the longitudinal direction, in addition to the fitting in the short-side direction.

Next, a structure for taking out the stored material from the plastic container 1 will be described with reference to fig. 4 and 5. Fig. 4 (a) is a perspective view of the outlet structure 30 on the bottom wall 21 side of the plastic container 1 as viewed from below, and fig. 4 (b) is a plan view thereof as viewed from below. Fig. 5 is a sectional view showing an opened state of the lid body 40 of the plastic container 1.

In addition to the upper container 10 and the lower container 20, the plastic container 1 is provided with a take-out structure 30 including a take-out port 31 for taking out the stored material and a lid 40 covering the take-out port 31 and being openable and closable at the bottom wall 21. The outlet structure 30 includes an outlet 31 as an opening, a rib 32, a fixing portion 33, an engagement hole 34, a space 35, and a rib 36.

The lid 40 has a substantially rectangular shape that is laterally long as a whole, and includes a fixing portion 41 for fixing the lid 40 to the outlet structure 30 of the bottom wall 21 via a fixing portion 33, a pressing portion 42 for pressing, and a lid portion 43 (see fig. 2 and 5) for covering the outlet 31. As shown in fig. 5, when the push-down portion 42 is pushed down inside the container (downward in the drawing, inside the space 35), the lid portion 43 pivots from the closed position to the open position about the second hinge 45. In fig. 5, the top and bottom are reversed from fig. 1 in order to explain the opening and closing of the outlet structure when the stored material is taken out from the outlet.

At this time, the engaging projection 46 provided on the inner surface side of the push-down portion 42 is configured to engage with the engaging hole 34 provided in the outlet structure 30, and maintain the open state (the state of fig. 5) of the lid body 40. That is, the operation of the lid portion 43 in the open position is fixed. As described above, the outlet structure 30 is provided with the rib 32, and the opening angle of the lid 43 is defined by the rib 32 formed obliquely. On the other hand, when the lid 40 is in the closed state, the rib 36 provided in the vicinity of the outlet 31 of the outlet structure 30 suppresses the floating of the lid 40, and the stored material does not protrude outside accidentally.

As described above, in the plastic container 1 of the present embodiment, the wedge-shaped projections 16 are provided on one outer wall at positions corresponding to the substantially rectangular four corners, and the concave portions 26 are provided on the other outer wall at positions corresponding to the substantially rectangular four corners and into which the wedge-shaped projections 16 are fitted. The upper container 10 and the lower container 20 are mounted so as not to be able to be pulled out by the wedge-shaped projections 16 and the recesses 26 being fitted at four corners. Therefore, the upper container 10 and the lower container 20 can be firmly fitted to each other. Further, since the wedge-shaped protrusion 16 and the recess 26 are provided on the outer wall, it is not necessary to provide a fitting portion on the upper wall or the like, and the container, particularly the container surface, can be configured so as not to impair the appearance of the container.

The outer surface of the upper short-side outer wall 12 is provided with a wedge-shaped protrusion 16, and the inner surface of the lower short-side outer wall 22 is provided with a recess 26. Therefore, it is possible to provide a plastic container that can firmly fit the upper container 10 and the lower container 20 and does not impair the aesthetic appearance of the container.

The wedge-shaped protrusion 16 is provided at the lower end of the upper short-side outer wall 12, and the recess 26 is provided at the lower end of the lower short-side outer wall 22. Therefore, it is possible to provide a plastic container that can firmly fit the upper container 10 and the lower container 20 and does not impair the aesthetic appearance of the container.

The lower container 20 has a pair of lower short-side inner walls 23 extending in a substantially vertical direction from a portion of the bottom wall 21 on the inner side of the lower short-side outer wall 22, the lower short-side inner walls 23 having a height lower than that of the lower short-side outer walls 22, the upper short-side outer wall 12 being positioned between the lower short-side outer walls 22 and the lower short-side inner walls 23, and the wedge-shaped projections 16 and the recesses 26 being fitted to each other, so that the upper container 10 and the lower container 20 are mounted so as not to be removable. In this case, it is possible to provide a plastic container that can firmly fit the upper container 10 and the lower container 20 and does not impair the aesthetic appearance of the container. Further, since the lower short-side inner wall 23 is also used, the upper container 10 and the lower container 20 can be more firmly fitted to each other.

The upper container 10 includes a pair of upper long-side outer walls 13 extending in a substantially vertical direction from the vicinity of both sides of the upper wall, and a pair of upper long-side inner walls 14 extending in a substantially vertical direction from the portions of the upper wall 11 inside the upper long-side outer walls 13, and the lower container 20 includes a pair of lower long-side outer walls 24 extending in a substantially vertical direction from the vicinity of both sides of the bottom wall 21, and a pair of lower long-side inner walls 25 extending in a substantially vertical direction from the portions of the bottom wall 21 inside the lower long-side outer walls 24.

Linear projections

18, 28 protruding toward each other are provided on the upper long-side outer wall 13 and the lower long-side outer wall 24, respectively, the lower long-side outer wall 24 is located between the upper long-side outer wall 13 and the upper long-side inner wall 14, and the linear projection 18 of the upper long-side outer wall 13 is fitted with the linear projection 28 of the lower long-side outer wall 24, so that the upper container 10 and the lower container 20 are mounted so as to be further unable to be pulled out. In this case, since the fitting is performed using not only the short-side inner wall but also the long-side inner wall and the long-side outer wall, the fitting of the upper container 10 and the lower container 20 can be stabilized, and a plastic container that does not impair the aesthetic appearance of the container can be provided.

The bottom wall 21 is provided with a take-out port structure 30 including a take-out port 31 for taking out the stored material, and a lid 40 covering the take-out port 31 and being openable and closable, and the lid 40 includes a fixing portion 41 for fixing the lid 40 to the take-out port structure 30 of the bottom wall 21, a pressing portion 42 for pressing down, and a lid portion 43 covering the take-out port 31. The fixing portion 41 is provided on one side of the pressing portion 42 via a first hinge 44, and the lid portion 43 is provided on the other side of the pressing portion 42 via a second hinge 45. When the push-down portion 42 is pushed down, the lid 40 can be rotated from the closed position to the open position about the second hinge 45. With this configuration, the stored material stored in the plastic container 1, for example, food (stored material) such as chewing gum or candy, can be easily taken out. Further, a projection or the like may be provided on the back surface side of the push-down portion 42 of the lid body 40, an engagement hole 34 into which the projection is engaged may be provided in the lower container 20, and when the lid body 40 is changed from the closed position to the open position, the projection may be engaged with the engagement hole 34 to maintain the open position of the lid body 40. In this case, the stored material stored in the plastic container 1 can be more easily taken out.

Next, a modified example of the present invention will be described with reference to fig. 6 to 8. Fig. 6 is a perspective view showing an upper container of a plastic container according to a modification. Fig. 7 is a perspective view showing a lower container of a plastic container according to a modification. Fig. 8 (a) and (b) are another perspective view showing a lower container of a plastic container according to a modification.

As shown in fig. 6 to 8, the plastic container 1a of the modified example is the same as the plastic container 1 except that the engaging structure on the short side is slightly different from the plastic container 1, and the description thereof will be omitted. The plastic container 1a includes, on the outer surface of the upper short-side outer wall 12, a groove portion 18a and an inclined portion 19a extending in the lateral direction below the linear protrusion 17. Since the plastic container 1a has the groove portion 18a, when the upper container 10a and the lower container 20a are fitted to each other, the linear protrusion 27 (fig. 7 and fig. 8) of the lower container 20a is temporarily engaged with the groove portion 18a, and the upper container 10a and the lower container 20a can be temporarily fixed to each other. In this way, since the groove portion 18a of the upper short-side outer wall 12 and the linear protrusion 27 of the lower short-side outer wall 22 can temporarily fix the upper container 10a and the lower container 20a before fitting, the upper container 10a can be fitted to the lower container 20a after positioning of the both, and the work can be performed more reliably. The inclined portion 19a is a surface inclined inward in the downward direction, and functions to facilitate sliding when the upper container 10a is fitted to the lower container 20 a.

In the plastic container 1a of the modification, as shown in fig. 7 and (a) and (b) of fig. 8, guide recesses 26a for guiding the wedge-shaped protrusion 16 to the recess 26 are provided at both ends of the upper end of the lower short-side outer wall 22. When the upper container 10a and the lower container 20a are fitted to each other, the wedge-shaped projection 16 is temporarily positioned in the guide recess 26a, and both containers can be fitted to each other after the positioning of both containers, so that the work for fitting the upper container 10a to the lower container 20a can be performed more reliably and accurately.

The plastic container 1a is provided with an extended wall 39 for preventing the stored material from entering the cavity of the outlet structure 30 on the side opposite to the outlet 31. This can prevent the plastic container from being damaged by the contents entering the cavity, or prevent the contents from being fitted into the plastic container.

Further, a modification of the plastic container may have the structure shown in fig. 9 and 10. In the modification shown in fig. 9 and 10, a pair of reinforcing ribs 29 are further provided between the lower short-side outer wall 22 and the lower short-side inner wall 23 of the lower container 20 b. The reinforcing rib 29 can prevent the lower short-side outer wall 22 or the lower short-side inner wall 23 from being bent inward due to shrinkage during molding of the lower container 20b, and can maintain the outer walls in an upright state. This prevents a problem when the upper container 10b is mounted to the lower container 20b with the upper short-side outer wall 12 positioned between the lower short-side outer wall 22 and the lower short-side inner wall 23. In this modification, in order to avoid interference with the reinforcing rib 29, the notch 19b may be provided in the upper short-side outer wall 12 of the upper container 10b as shown in fig. 10. In this modification, the extension wall 39a of the outlet structure 30 extends to the lower long-side inner wall 25. Therefore, the accommodated matter can be prevented from entering or being caught in the space formed inside the container of the fixing portion 33. In addition, the plastic container can be further prevented from being damaged or broken by the impact when dropped.

The plastic container of the present embodiment has been described above, but the plastic container of the present invention is not limited to the above-described embodiment, and various modifications can be applied. For example, in the above embodiment, the wedge-shaped projection 16 is provided on the

upper container

10, 10a, 10b side, and the recess 26 to be fitted thereto is provided on the

lower container

20, 20a, 20b side, but the wedge-shaped projection 16 may be provided on the

lower container

20, 20a, 20b side, and the recess 26 to be fitted thereto may be provided on the

upper container

10, 10a, 10b side.

Industrial applicability of the invention

The present invention can be applied to a plastic container that can store a content such as chewing gum or candy.

Description of the reference numerals

1. 1a … plastic container, 10a, 10b … upper container, 11 … upper wall, 11a … ends, 11b … sides, 12 … upper short side outer wall, 13 … upper long side outer wall, 14 … upper long side inner wall, 16 … wedge-shaped protrusion, 17 … linear protrusion, 18 … linear protrusion, 20, 20a, 20b … lower container, 21 … bottom wall, 22 … lower short side outer wall, 23 … lower short side inner wall, 24 … lower long side outer wall, 25 … lower long side inner wall, 26 … concave portion, 27 … linear projection, 28 … linear projection, 29 … reinforcing rib, 30 … take-out opening structure, 31 … take-out opening, 32 … rib, 33 … fixing portion, 34 … engaging hole, 35 … space, 36 … rib, 39a … extending wall portion, 40 … cover, 41 … fixing portion, 42 … pressing portion, 43 … cover portion, 44 … first hinge, 45 … second hinge, 46 … engaging projection.

Claims

1. A plastic container is provided with:

an upper container having a substantially rectangular upper wall and a pair of upper short-side outer walls extending from the vicinity of both ends of the upper wall in a substantially vertical direction, respectively; and

a lower container having a substantially rectangular bottom wall and a pair of lower short-side outer walls extending from the vicinities of both ends of the bottom wall in a substantially vertical direction,

a wedge-shaped protrusion that is located at a position corresponding to four substantially rectangular corners and protrudes toward the other outer wall is provided on one outer wall of the upper short-side outer wall and the lower short-side outer wall, a recess that is located at a position corresponding to four substantially rectangular corners and into which the wedge-shaped protrusion is fitted is provided on the other outer wall of the upper short-side outer wall and the lower short-side outer wall,

the outer surface of the outer wall of the upper short edge is provided with the wedge-shaped protrusion, the inner surface of the outer wall of the lower short edge is provided with the concave part,

the wedge-shaped protrusion is engaged with the recess, so that the upper container and the lower container are installed not to be pulled out,

the outer surface of the upper short-side outer wall is provided with a groove portion extending in the transverse direction, and the inner surface of the lower short-side outer wall is provided with a linear protrusion extending in the transverse direction, so that the upper container and the lower container can be temporarily fixed when the linear protrusion is engaged with the groove portion before fitting.

2. The plastic container of claim 1,

the wedge-shaped protrusion is arranged at the lower end of the outer wall of the short edge of the upper part, and the concave part is arranged at the lower end of the outer wall of the short edge of the lower part.

3. The plastic container according to claim 1 or 2,

a guide recess for guiding the wedge-shaped protrusion to the recess is provided at an upper end of the lower short-side outer wall.

4. The plastic container according to claim 1 or 2,

the lower container has a pair of lower short-side inner walls extending in a substantially vertical direction from a portion of the bottom wall inside the lower short-side outer wall,

the height of the lower short-side inner wall is lower than that of the lower short-side outer wall, and the upper container and the lower container are mounted so as not to be pulled out by the upper short-side outer wall being located between the lower short-side outer wall and the lower short-side inner wall and the wedge-shaped protrusion being fitted in the recess.

5. The plastic container of claim 4,

the lower container has a reinforcing rib located between the lower short-side outer wall and the lower short-side inner wall.

6. The plastic container according to claim 1 or 2,

the upper container has a pair of upper long-side outer walls extending in a substantially vertical direction from the vicinity of both sides of the upper wall, and a pair of upper long-side inner walls extending in a substantially vertical direction from portions of the upper wall that are located inward of the upper long-side outer walls,

the lower container has a pair of lower long-side outer walls extending in a substantially vertical direction from the vicinity of both sides of the bottom wall, and a pair of lower long-side inner walls extending in a substantially vertical direction from a portion of the bottom wall inside the lower long-side outer walls,

linear protrusions protruding toward each other are provided on the upper long side outer wall and the lower long side outer wall, respectively, and the upper container and the lower container are mounted so as not to be pulled out by the lower long side outer wall being positioned between the upper long side outer wall and the upper long side inner wall and the linear protrusions of the upper long side outer wall being fitted with the linear protrusions of the lower long side outer wall.

7. The plastic container according to claim 1 or 2,

the bottom wall is provided with a take-out structure including a take-out port for taking out the stored material, and a lid body covering the take-out port and capable of being opened and closed,

the lid body has a fixing portion for fixing the lid body to the outlet structure of the bottom wall, a pressing portion for pressing operation, and a lid portion for covering the outlet, the fixing portion is provided on one side of the pressing portion via a first hinge, the lid portion is provided on the other side of the pressing portion via a second hinge, and the lid body is rotatable from a closed position to an open position with the second hinge as an axis when the pressing portion is pressed.

8. A plastic container is provided with:

9. The plastic container of claim 8,

the outer surface of the outer wall of the short edge of the upper part is provided with the wedge-shaped protrusion, and the inner surface of the outer wall of the short edge of the lower part is provided with the concave part.

10. The plastic container of claim 9,

11. The plastic container according to claim 9 or 10,

12. The plastic container according to any one of claims 8 to 10,

13. The plastic container of claim 12,

14. The plastic container according to claim 8 or 9,

15. A plastic container is provided with:

the lid body has a fixing portion for fixing the lid body to the outlet structure of the bottom wall, a pressing portion for pressing operation, and a lid portion for covering the outlet, the fixing portion is provided on one side of the pressing portion via a first hinge, the lid portion is provided on the other side of the pressing portion via a second hinge, and the lid body is rotatable from a closed position to an open position with the second hinge as an axis when the pressing portion is pressed,

an engaging projection is provided on an inner surface side of the push-down portion, and an engaging hole with which the engaging projection is engaged is provided in the ejection port structure,

when the lid is in the open state, the engaging projection engages with the engaging hole to fix the movement of the lid in the open position.

16. The plastic container of claim 15,

the ejection opening structure is provided with a rib for defining an opening angle of the lid portion.

17. The plastic container of claim 15 or 16,

the ejection opening structure is provided with a rib for suppressing the lid from floating when the lid is in the closed position.

18. The plastic container of claim 15 or 16,

the outlet structure is provided with an extended wall portion configured to prevent the contents of the plastic container from entering a cavity provided on the inner side of the lower container and on the opposite side of the outlet.