JP2013203418A - Container - Google Patents

Abstract

The present invention provides a container that can reliably prevent the lid from coming off from the container main body even during physical transportation.
A container body and a lid body made of an expandable synthetic resin are provided, and the container body and the lid body are detachable by a fitting portion and a fitted portion that are detachably fitted to each other in the height direction of the side wall. One of the fitting part and the fitted part is the fitting convex part 5 and the other is the fitting concave part 6, and one of the fitting part and the fitted part is in the height direction of the side wall. It is formed over the entire circumference of the end, and the other of the fitting part and the fitted part corresponds to one of the fitted part and the fitted part on the side wall at the outer peripheral edge on the back side of the lid. The fitting convex portion 5 is formed at a position, and includes a large portion disposed in the middle in the height direction and a small width portion disposed on both sides in the height direction with respect to the large portion, and the fitting concave portion 6. Is formed in a shape relative to the cross section of the fitting convex portion 5 so as to be fitted to the large portion and each small width portion. Container.
[Selection] Figure 4

Description

  The present invention relates to a container composed of a container main body and a lid formed of a foamable synthetic resin.

  As this type of container, the container of Patent Document 1 below has been proposed. This container is formed of a foamable synthetic resin, and includes a container main body having an opening at the upper end and a lid that is detachably attached to the opening of the container main body.

  The container main body includes a bottom wall formed in a substantially rectangular shape in plan view, and a main body side wall raised upward from the outer peripheral edge of the bottom wall. On the upper end of the main body side wall, a rectangular frame-like fitting ridge that protrudes upward over the entire circumference is formed.

  The lid includes a top wall having a substantially rectangular shape in plan view and a lid side wall extending downward from the outer peripheral edge of the top wall. And the fitting groove | channel which fits with the protrusion for fitting is formed in the thickness (width) direction middle part of the cover body side wall.

  The side surfaces on both sides of the upper part of the fitting ridge are each formed as a curved surface that bulges outward in the thickness direction, and the side surfaces on both sides of the lower part are bound inward in the thickness direction as compared to the upper side surface. The fitting groove includes a portion that fits with the upper portion of the fitting ridge and a portion that fits with the lower portion, and the cross section is formed in a relative shape to the cross section of the fitting ridge. And in this container, a cover body is mounted | worn with a container main body by making the groove | channel for a fitting fit to the convex protrusion for a container main body.

JP-A-8-58846

  In the above conventional container, the side surfaces on both sides bulge outward in the thickness direction at the upper part of the fitting ridge, and the side surfaces on both sides are constricted in the thickness direction in comparison with the upper side surface at the lower part, Since the cross section is formed in a relative shape with the cross section of the fitting ridge, the fitting force at the time of fitting both is improved accordingly.

  However, when a transported object (for example, fish) is accommodated inside a container and transported in a physical distribution, depending on the weight of the transported object to be accommodated or the handling of the container (hand roughness), the lid may be May fall off.

  Therefore, an object of the present invention is to provide a container that can reliably prevent the lid from coming off from the container main body even during physical conveyance.

  The container of the present invention includes a container body made of a foamable synthetic resin and a lid, and the container body is erected on the polygonal bottom wall and the outer peripheral edge on the front side of the bottom wall. A frame-like side wall serving as an opening of the main body, and the container main body and the lid are detachable by a fitting portion and a fitted portion that are detachably fitted to each other in the height direction of the side wall, One of the fitting portion and the fitted portion is a fitting convex portion and the other is a fitting concave portion, and one of the fitting portion and the fitted portion is the entire height direction end of the side wall. It is formed over the circumference, and the other of the fitting part and the fitted part is formed at a position corresponding to one of the fitted part and the fitted part on the side wall on the rear outer peripheral edge of the lid. The fitting convex portion is arranged at a middle portion in the height direction, and the height direction with respect to the large portion. The fitting recess is formed in a shape relative to the cross-section of the fitting protrusion so as to be fitted to the large portion and each of the narrow portions. Yes.

  In the above configuration, the lid is attached to the container main body by fitting the fitting portion and the fitting portion, and the fitting convex portion is the large portion and the fitting portion in the fitting between the fitting portion and the fitting portion. Since it has a narrow portion on both sides in the height direction, and the concave portion for fitting is in a shape relative to the cross-section of the convex portion for fitting, the small width portion arranged on the front end side in the height direction among the narrow portions, and for fitting Since the fitting force between the fitting convex portion and the fitting concave portion is increased by fitting the portion corresponding to the small width portion on the front end side in the height direction in the concave portion, even if an external force is applied to the container at the time of logistics transportation The lid body is difficult to come off from the container body, and the sealing degree between the fitting convex part and the fitting concave part is high.

  In the container of the present invention, a configuration in which a fitting convex portion is formed on the end surface in the height direction of the side wall and a fitting concave portion is formed on the lid can be employed. By forming the fitting recess in the lid, it is difficult for water or the like to enter the fitting recess.

  In the container of the present invention, in the state in which the fitting convex portion and the fitting concave portion are fitted, the widened portion and the constricted portions arranged on both sides of the widened portion are fitted with the fitting concave portion. The fitting force between the portion and the fitting recess is high, and therefore it is possible to reliably prevent the lid from being detached from the container body even during physical distribution.

It is a perspective view of the state where a lid was removed from a container main part of a container showing one embodiment of the present invention. It is a side view of the state which attached the lid to the container main part. It is a longitudinal cross-sectional view in the left-right direction center part of the state which removed the cover body from the container main body. It is an expanded sectional view showing the fitting state of the convex protrusion for fitting formed in the container main body side, and the groove for fitting formed in the cover body side.

  Hereinafter, an embodiment of a container according to the present invention will be described with reference to FIGS. 1 to 4. The container 1 of this embodiment is formed in a box shape that can store fish (for example, salmon, salmon, etc.) that are transported objects together with ice water.

  As shown in FIGS. 1 and 2, the container 1 includes a container body 3 made of a foamable synthetic resin having an opening 2 at the upper end, and the container body 3 is substantially sealed by closing the opening 2 of the container body 3. And a lid 4 made of an expandable synthetic resin for making the state. The foaming synthetic resin is not particularly limited, and various foaming synthetic resins such as foamed polystyrene, foamed polyethylene, and foamed polypropylene can be used. In the following description, the short side direction of the container 1 is the left-right direction (in FIG. 1, the left direction is L and the right direction is R), and the long side direction of the container 1 is the front-rear direction ( In FIG. 1, the front direction is indicated by F, and the rear direction is indicated by B).

  As shown in FIGS. 1 and 3, the container body 3 includes a bottom wall 30 and a body side wall 31. Hereinafter, in the bottom wall 30, the upper surface is referred to as the front surface, and the lower surface is referred to as the back surface. The bottom wall 30 is formed in a flat plate shape that is substantially rectangular in plan view. The surface 30c of the bottom wall 30 corresponds to the bottom surface of the container body 3 and is a surface that supports the object to be conveyed. The surface 30c of the bottom wall 30 is a flat surface. Further, the back surface 30d of the bottom wall 30 is a flat surface parallel to the front surface 30c. Therefore, in the back surface 30d of the bottom wall 30, the outer peripheral region 30a is a flat surface. An inner portion surrounded by the outer peripheral region 30 a is a protruding portion 30 b that protrudes downward from the back surface 30 d of the bottom wall 30. The protruding portion 30 b is formed integrally with the back surface 30 d of the bottom wall 30. Further, the lower surface 300b of the protruding portion 30b is formed on a flat surface.

  The container 1 of the present embodiment is used so that the lower surface 300b of the projecting portion 30b is directly placed on the floor surface, or the lower surface 300b is placed on the surface 40a of the top wall 40 of the lid 4 of the other container 1. It can be used.

  The main body side wall 31 is formed in a rectangular frame shape by being raised upward from the outer peripheral edge portion of the surface 30 c of the bottom wall 30. The main body side wall 31 includes left and right side walls 310 and 310 and front and rear side walls 320 and 320. The left and right side walls 310, 310 are raised upward from left and right edges that are a pair of long sides of the bottom wall 30, and face each other in the left-right direction. The front and rear side walls 320, 320 are raised upward from the front and rear edges, which are a pair of short sides of the bottom wall 30, and face each other in the front-rear direction. The main body side wall 31 is integrally formed from a thick portion 300 that is directly continuous with the bottom wall 30 and a thin portion that is disposed at a front end portion in the height direction of the thick portion 300 and is a fitting convex portion 5 described later. Is formed.

  Holding grips 321 and 321 for holding the container 1 with a finger are formed at the center in the left-right direction of the outer surface in the thickness direction of the front and rear side walls 320 and 320 (hereinafter simply referred to as the outer surface). The holding recesses 321 and 321 extend upward from the outer peripheral region 30a on the back surface 30d, which is the lower surface of the bottom wall 30, to the middle in the vertical direction (height direction) of the front and rear side walls 320 and 320. In the front and rear side walls 320, 320, the region corresponding to the gripping recesses 321, 321 is formed in the center of the container body 3 in order to avoid a reduction in thickness (width) by forming the gripping recesses 321, 321. It protrudes inward, which is the side.

  The outer surfaces of the left and right side walls 310, 310 are formed as inclined surfaces that are inward as the lower side (closer to the surface 30 c side of the bottom wall 30). In addition, inner surfaces in the thickness direction (hereinafter simply referred to as inner surfaces) of the left and right side walls 310, 310 are formed as inclined surfaces that are inward as the lower side. Such an inclined surface is obtained by the draft of the production mold, and is formed by being inclined by the production mold in order to ensure the releasability of the container body 3 with respect to the production mold. In addition, since the inclination angle of the inclined surface is set to 1 °, it is difficult to grasp on the drawing.

  Opening recesses 322 are formed at four corners of the rectangular side wall 31 of the rectangular frame shape. The recess 322 for opening the lid is used to lift the lid 4 against the container body 3 by placing a finger on the back surface of the corner of the lid side wall 41 of the lid 4 attached to the container body 3.

  The main body side wall 31 (the left and right side walls 310 and 310 and the front and rear side walls 320 and 320) includes the fitting convex portion 5 (hereinafter referred to as the fitting convex strip 5). The fitting ridge 5 is arranged at the upper end, which is the front end of the thick portion 300 of the main body side wall 31, over the entire circumference of the inner edge of the main body side wall 31 and is formed along the vertical direction. Has been.

  As shown in FIG. 4, the fitting protrusion 5 includes a widened portion 50 corresponding to a large portion and a constricted portion corresponding to a small width portion. The widened portion 50 occupies the middle portion of the fitting ridge 5 in the vertical direction. The constricted portion is a portion that is formed integrally with the lower portion of the widened portion 50 and the upper portion of the widened portion 50 and is constricted inward in the thickness direction so that the thickness is reduced with respect to the widened portion 50.

  The widened portion 50 will be described in detail. The widened portion 50 is a curved surface that protrudes so that both side surfaces (inner surface and outer surface) in the thickness direction of the fitting protrusion 5 are widened outward in the thickness direction, which is a direction away from each other. An example of a protruding surface). The inner surface of the widened portion 50 is formed by an inner curved surface 50a and an inner flat surface 50b continuous with the upper end portion of the inner curved surface 50a. The inner curved surface 50a is a curved surface with the middle part in the vertical direction protruding inward. The inner flat surface 50b is a horizontal plane along the thickness direction of the fitting protrusion 5.

  The outer surface of the widened portion 50 is formed of an outer curved surface 50c and an outer flat surface 50d continuous with the upper end portion of the outer curved surface 50c. The outer curved surface 50c is a curved surface with the middle part in the vertical direction protruding outward. The outer flat surface 50d is a horizontal plane along the horizontal direction. The lower end position 50e of the outer curved surface 50c is set to a position lower than the lower end position 50f of the inner curved surface 50a. For this reason, the widened portion 50 is asymmetric with respect to the center in the thickness direction. The inner flat surface 50b and the outer flat surface 50d are set at an equal height from the upper end surface 300a of the thick portion 300 of the main body side wall 31.

  The constricted portion includes a lower constricted portion 51 located below the widened portion 50 and an upper constricted portion 52 located above the widened portion 50. The lower constricted portion 51 is formed to have the same width in the circumferential direction, and the lower inner surface 51a and the lower outer surface 51b of the lower constricted portion 51 are vertical surfaces along the vertical direction, respectively.

  The upper constricted portion 52 is formed to have the same width in the circumferential direction, and the upper inner surface 52a and the upper outer surface 52b of the upper constricted portion 52 are inclined surfaces closer to the center in the thickness direction of the fitting protrusion 5 toward the upper side. Has been. Specifically, the upper inner surface 52a of the upper constricted portion 52 is an inclined surface whose upper side is inclined outward, and the upper outer surface 52b is an inclined surface whose upper side is inclined inward.

  The separation distance in the thickness direction between the lower ends of the upper inner surface 52a and the upper outer surface 52b in the upper constricted portion 52 is smaller than the separation distance in the thickness direction of the lower inner surface 51a and the lower outer surface 51b in the lower constricted portion 51. Is set.

  The proportion of the height of the upper constricted portion 52 in the fitting ridge 5 is set smaller than the proportion of the height of the lower constricted portion 51. In other words, the height of the upper constricted portion 52 is set lower than the height of the lower constricted portion 51. The upper end position of the upper inner surface 52 a and the upper end position of the upper outer surface 52 b in the upper constricted portion 52 are set to substantially the same height from the upper end surface 300 a of the thick portion 300 of the main body side wall 31. The upper end surface (upper end surface of the fitting protrusion 5) 5a of the upper constricted portion 52 is a flat surface along the horizontal direction.

  The lid 4 includes a top wall 40 and a lid side wall 41. Hereinafter, in the top wall 40, the upper surface is referred to as the front surface, and the lower surface is referred to as the back surface. The top wall 40 is formed in a substantially rectangular shape (an example of a polygonal shape) in plan view, and the surface 40a is a flat surface. The back surface 40b of the top wall 40 is a flat surface parallel to the front surface 40a.

  The lid side wall 41 is formed integrally with the back surface 40 b of the top wall 40 so as to extend downward from the outer peripheral edge of the back surface 40 b of the top wall 40 of the lid body 4. A fitting recess that is recessed upward and detachably fitted to the fitting protrusion 5 of the container body 3 is formed in the central portion in the thickness direction of the lid side wall 41. That is, the lid side wall 41 includes a fitting recess, a rectangular frame-shaped protruding strip portion arranged outside the fitting recess, and a rectangular frame-shaped protruding strip portion arranged inside the fitting recess. With.

  Hereinafter, in the lid side wall 41, the fitting recess 6 is referred to as a fitting groove 6, and the rectangular frame-shaped protruding portion outside the fitting groove 6 is referred to as an outer wall portion 42. On the other hand, the protruding portion of the rectangular frame shape on the inner side is referred to as an inner wall portion 43. In the lid side wall 41, the distance from the back surface 40b of the top wall 40 to the lower surface 42a of the outer wall portion 42, that is, the height of the outer wall portion 42 is the distance from the back surface 40b to the lower surface 43a of the inner wall portion 43, That is, it is set slightly lower than the height of the inner wall portion 43.

  The outer wall portion is composed of left and right outer wall portions 410 and 410 and front and rear outer wall portions 411 and 411. The left and right outer wall portions 410, 410 are formed to extend downward from the left and right edge portions of the back surface 40 b of the top wall 40, and the front and rear outer wall portions 411, 411 are formed before and after the back surface 40 b of the top wall 40. It is formed so as to extend downward from the edge. The lower end surfaces of the left and right outer wall portions 410, 410 and the front and rear outer wall portions 411, 411 are flush with each other, and the height of the outer wall portion is set to the same height from the back surface 40 b of the top wall 40.

  The inner wall portion is formed on the back surface 40b of the top wall 40 by a predetermined distance (a distance corresponding to the width of the fitting groove 6) from the outer wall portion and along the outer wall portion. The inner wall portion is composed of front and rear inner wall portions 420 and 420 facing in the front-rear direction and left and right inner wall portions 430 and 430 facing in the left-right direction. That is, the inner wall portion is formed in a rectangular frame shape that protrudes downward from the back surface 40 b of the top wall 40.

  The fitting groove 6 is a recess that is detachably fitted to the fitting protrusion 5 of the container body 3. The fitting groove 6 is formed along the entire circumference of the lid side wall 41. By fitting the fitting ridge 5 and the fitting groove 6, the fitting ridge 5 and the fitting groove 6 are sealed (the container body 3 and the lid 4 are sealed), and the container The opening 2 of the main body 3 is covered with a lid 4.

  That is, the cross-sectional shape of the fitting groove 6 is formed in a relative shape to the cross-sectional shape of the fitting ridge 5. In other words, the fitting groove 6 is formed by a facing surface that faces the outer surface of the fitting protrusion 5 in the fitting state between the fitting protrusion 5 and the fitting groove 6.

  The fitting groove 6 is relative to the lower constricted recess 60 having a cross-sectional shape relative to the lower constricted portion 51, the widened concave portion 61 having a cross-sectional shape relative to the widened portion 50, and the upper constricted portion 52. The upper constricted recess 62 has a cross-sectional shape.

  The lower constricted recess 60 includes a lower opposing inner surface 60a that faces the lower inner surface 51a of the lower constricted portion 51 and contacts the lower constricted portion 51 in the fitted state between the fitting ridge 5 and the fitting groove 6. 51 has a lower opposing outer surface 60b that faces and contacts the lower outer surface 51b.

  The widening recess 61 faces and contacts the inner curved surface 50a, the inner flat surface 50b, the outer curved surface 50c, and the outer flat surface 50d of the widened portion 50 in the fitted state between the fitting ridge 5 and the fitting groove 6. An inner facing curved surface 61a, an inner facing flat surface 61b, an outer facing curved surface 61c, and an outer facing flat surface 61d.

  The upper constricted recess 62 includes an upper facing inner surface 62a that faces the upper inner surface 52a of the upper constricted portion 52 in contact with the fitting convex strip 5 and the fitting groove 6, and an upper outer surface 52b of the upper constricted portion 52. And an upper facing outer surface 62b that contacts and faces the surface.

  The opposed upper end surface 6a, which is the upper end surface of the upper constricted recess 62, is a surface in which the upper opposed inner surface 62a and the upper opposed outer surface 62b are continuous at the upper end position, and the fitting state between the fitting ridge 5 and the fitting groove 6 is 2 is a surface facing the upper end surface 5a of the fitting ridge 5.

  As shown in FIG. 1, a reinforcing convex portion 401 for reinforcing a lid body is provided on the outer edge portion of the surface 40 a of the top wall 40 so as to be spaced apart at a predetermined interval in the circumferential direction of the top wall 40 and to protrude upward from the surface 40 a. Are integrally formed. In the present embodiment, the reinforcing convex portions 401 are arranged at the four corners of the surface 40 a of the top wall 40.

  The reinforcing convex portions 401 are separated from each other at the center portion of the front and rear outer edges of the surface 40a of the top wall 40 and the center portion of both the left and right outer edges of the surface 40a. The region where the reinforcing convex portions 401 are separated from each other on the outer edge of the surface 40a is for hanging a band (not shown) for integrating the container body 3 and the lid body 4 in the longitudinal direction and the lateral direction of the container 1. The band hanging portion 402 is used.

  In the container 1 having the above-described configuration, the object to be transported (for example, fish such as sharks and sharks indicated by reference numeral G in FIG. 3) is received by the operator or the like from the opening 2 of the container body 3, and then the container body 3 is covered. By attaching the body 4, the opening 2 is closed (the inside of the container body 3 is almost sealed with respect to the outside), and the container 1 is transported in this state.

  To attach the lid 4 to the container body 3, the fitting groove 5 formed on the container body 3 side is aligned with the fitting groove 6 formed on the lid body 4 side from above. The fitting ridge 5 and the fitting groove 6 are fitted.

  In this embodiment, the cross sections of the fitting ridge 5 and the fitting groove 6 are formed in a relative shape. Further, the separation distance in the thickness direction between the lower ends of the upper inner surface 52a and the upper outer surface 52b in the upper constricted portion 52 is compared with the separation distance in the thickness direction of the lower inner surface 51a and the lower outer surface 51b in the lower constricted portion 51. Is set to be small. That is, the separation distance in the thickness direction between the lower ends of the upper inner surface 52a and the upper outer surface 52b in the upper constricted portion 52 is larger than the separation distance between the lower facing inner surface 60a and the lower facing outer surface 60b of the lower constricted recess 60. small. However, the upper inner surface 52a and the upper outer surface 52b are inclined so as to approach each other upward. For this reason, the upper constricted portion 52 can be smoothly inserted into the lower constricted concave portion 60 without hindrance at the start of fitting between the fitting convex strip 5 and the fitting groove 6.

  When the upper constricted portion 52 is inserted into the lower constricted concave portion 60, the lid body 4 is further pressed downward. In the present embodiment, the width of the widened portion 50 is larger than the distance between the lower facing inner surface 60a and the lower facing outer surface 60b. Therefore, after the upper constricted portion 52 is inserted into the lower constricted concave portion 60, when the lid body 4 is further pressed downward, the inner flat surface 50b and the outer flat surface 50d of the widened portion 50 become the inner wall portion 43 and the outer wall, respectively. It contacts the lower surfaces 43a, 42a of the portion 42 from below.

  However, the container main body 3 (fitting ridge 5) and the lid 4 (lid side wall 41) are made of foaming synthetic resin and can be elastically deformed. Therefore, by further pressing the lid 4 downward, the inner flat surface 50b, the outer flat surface 50d, the inner curved surface 50a, and the outer curved surface 50c narrow the width of the widened portion 50 in the fitting ridge 5. In the lid 4, the inner wall portion 43 and the outer wall portion 42 are elastically deformed so as to increase the distance between the lower facing inner surface 60 a and the lower facing outer surface 60 b. For this reason, the widened portion 50 is inserted into the lower constricted recess 60 without difficulty.

  When the lid 4 is further pressed downward and the widened portion 50 reaches the widened recess 61, the narrowed widened portion 50 is elastically restored, and the inner curved surface 50a and the outer curved surface 50c of the widened portion 50 are expanded into the widened concave portion. The inner flat surface 50b and the outer flat surface 50d of the widened portion 50 are in contact with the inner counter flat surface 61b and the outer counter flat surface 61d of the widened recess 61, respectively. Abut.

  Further, the upper constricted portion 52 is inserted into the upper constricted concave portion 62, and the upper inner surface 52a and the upper outer surface 52b of the upper constricted portion 52 abut against the upper opposed inner surface 62a and the upper opposed outer surface 62b of the upper constricted concave portion 62, respectively. Further, the upper end surface 5 a of the upper constricted portion 52 contacts the opposed upper end surface 6 a of the upper constricted concave portion 62. Further, the lower inner surface 51a and the lower outer surface 51b of the lower constricted portion 51 abut against the lower opposing inner surface 60a and the lower opposing outer surface 60b of the lower constricted recess 60, respectively.

  And in this embodiment, the container main body 3 and the cover body 4 are a fitting groove and a fitting groove on the cover body 4 side as a fitting section and a fitted section to be detachably fitted. 6, the fitting ridge 5 includes a widened portion 50, an upper constricted portion 51 on the upper side, and a lower constricted portion 51 on the lower side, and the fitting groove 6 has an enlarged concave portion 61 and an upper side constricted on the upper side. The concave portion 62 is provided with a lower constricted concave portion 60 on the lower side, and the cross section is formed in a relative shape with the fitting ridge 5. For this reason, in the state in which the fitting ridge 5 and the fitting groove 6 are fitted, it is difficult for air to enter between the outer surface of the fitting ridge 5 and the inner surface of the fitting groove 6.

  In other words, the fitting ridge 5 and the fitting groove 6 are surfaces along the vertical direction (the lower inner surface 51a and the lower outer surface 51b, the lower opposing inner surface 60a and the lower opposing outer surface 60b), outward in the thickness direction. Surfaces (inner curved surface 50a and outer curved surface 50c, inner opposed curved surface 61a and outer opposed curved surface 61c), surfaces along the left and right and front and rear directions (inner flat surface 50b and outer flat surface 50d, inner facing) The flat surface 61b and the outer opposing flat surface 61d) are in contact with the surfaces that are inclined with respect to the vertical direction (the upper inner surface 52a and the upper outer surface 52b, the upper opposing inner surface 62a and the upper opposing outer surface 62b). For this reason, the fitting force (sealing force) between the surface that forms the fitting ridge 5 and the surface that forms the fitting groove 6 is high. Therefore, even if the operator tries to remove the fitting between the fitting ridge 5 and the fitting groove 6 in order to remove the lid 4 from the container body 3, a state in which the operator does not come off very easily does not occur.

  Thus, since the fitting force between the fitting ridge 5 and the fitting groove 6 is high, the container 1 is carried in the state where the object to be conveyed is accommodated in the container body 3 and the lid body 4 is mounted on the container body 3. Even if an external force is applied to the container 1, the lid 4 is difficult to come off from the container body 3. Furthermore, the fitting force (sealing force) between the fitting ridges 5 and the fitting grooves 6 is high, and therefore the degree of sealing inside the container body 3 by the lid 4 is high, and therefore the storage stability of the conveyed object is also excellent. .

  In particular, the lower end position of the outer curved surface 50c (outer facing curved surface 61c) is set lower than the lower end position of the inner curved surface 50a (inner facing curved surface 61a), and the widened portion 50 is in the thickness direction. The shape is asymmetric with respect to the center. Thus, in the fitting state of the fitting ridge 5 and the fitting groove 6, a curved surface that is long in the vertical direction with respect to the inner side is arranged on the outer side where outside air easily enters. For this reason, the fitting force of the surface which forms the convex protrusion 5 for fitting, and the surface which forms the groove | channel 6 for fitting becomes still higher, and the function which external air tries to approach into the container 1 by that much is suppressed. be able to.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. The same applies to the specific configuration of each part. In the said embodiment, the container main body 3 and the cover body 4 are the fitting part 5 and the fitting groove | channel 6 on the cover body 4 side as a fitting part and a to-be-fitted part which are detachably fitted. It was explained in the case of having. However, it is also possible to arrange the fitting groove 6 on the container body 3 side and arrange the fitting projection 5 on the lid 4 side. In this case, the fitting groove 6 is formed to extend downward in the middle of the main body side wall 31 in the thickness direction of the upper end surface of the main body side wall 31, and the fitting ridge 5 is formed on the lid side wall of the lid body 4. 41 is disposed at a position corresponding to the fitting groove 6.

  In the above embodiment, the upper end surface 5a of the widened portion 50 and the opposed upper end surface 6a of the fitting groove 6 are flat surfaces along the front-rear and left-right directions. However, the upper end surface 5a may be a curved surface that protrudes upward, and the opposed upper end surface 6a may be curved so as to correspond thereto. In this case, since the contact area between the two is further increased as compared with the case where the flat surface extends in the front-rear / left-right direction, the fitting force between the fitting ridge 5 and the fitting groove 6 is increased.

  In the above embodiment, the upper inner surface 52a and the upper outer surface 52b of the fitting ridge 5 are inclined surfaces. The inclination angle is not particularly limited, and the upper inner surface 52a and the upper outer surface 52b may be inclined toward the center in the thickness direction. Further, the upper inner surface 52a and the upper outer surface 52b may be surfaces along the vertical direction without being inclined. In this case, the upper facing inner surface 62a and the upper facing outer surface 62b are also configured to be in contact with each other in the fitted state of the fitting ridge 5 and the fitting groove 6 as surfaces along the vertical direction.

  In the above embodiment, one upper constricted portion 52 is provided on the upper side with respect to the widened portion 50. However, a constricted portion that is further constricted (becomes thin) with respect to the upper constricted portion 52 may be formed further above the upper constricted portion 52. In this case, the fitting groove is formed in a relative shape with the fitting protrusion. By forming the fitting ridges and the fitting grooves in this way, the fitting force between them is further increased, and the sealing performance is also improved.

  In the said embodiment, it demonstrated by the example which used the protrusion surface of the wide part as the curved surface. However, the widened portion may be formed in a rectangular cross section, and the protruding surface may be a plane along the vertical direction.

  DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Opening part, 3 ... Container main body, 4 ... Cover body, 5 ... Fitting protrusion (fitting protrusion), 6 ... Fitting groove (fitting recessed part), 30 ... Bottom wall, 31 ... Main body side wall, 40 ... Ceiling wall, 41 ... Lid side wall, 42 ... Outer wall portion, 43 ... Inner wall portion, 50 ... Widened portion, 51 ... Lower side constricted portion, 52 ... Upper constricted portion, 60 ... Lower constricted concave portion 61 ... Widening recess, 62 ... Upper constriction recess

Claims (2)

A container body made of a foamable synthetic resin and a lid body are provided. The container body is erected on a polygonal bottom wall and a front outer peripheral edge of the bottom wall, and an end in the height direction is used as an opening of the container body. A frame-shaped side wall,
The container body and the lid are detachable by a fitting portion and a fitted portion that are detachably fitted to each other in the height direction of the side wall, and one of the fitting portion and the fitted portion is The fitting convex portion and the other are fitting concave portions, and one of the fitting portion and the fitted portion is formed over the entire circumference of the side wall in the height direction, and the fitting portion and the fitted portion The other of the parts is formed at a position corresponding to one of the fitting part and the fitted part on the side wall at the outer peripheral edge on the back side of the lid,
The fitting convex portion includes a large portion disposed in the middle in the height direction, and a small width portion disposed on both sides in the height direction with respect to the large portion,
The container, wherein the fitting recess is formed in a shape relative to a cross section of the fitting protrusion so as to be fitted to the large portion and each narrow portion.   The container according to claim 1, wherein a fitting convex portion is formed on an end surface in the height direction of the side wall, and a fitting concave portion is formed on the lid.

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