JP2014122041A - Foamed resin container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamed resin container in which accidental slide of a small lid is prevented.SOLUTION: A lid main body 2 is provided with a top wall 31 arranged on the upper side of an opening part 21 when it is attached to a container main body so as to close the opening part 21. A vent hole part 33 is provided on the top wall so as to vertically penetrate the top wall. A small lid 4 is provided in a manner where the bottom surface side of the small lid 4 is slidably in contact with the upper surface side of the top wall. A downward projection projecting downward is provided on the bottom surface side of the small lid. An upward projection projecting upward is provided on the upper surface side of the top wall. The downward projection is provided at a position where the downward projection is in contact with the upward projection on the top wall while the small lid is sliding in a sliding operation of small lid for opening and closing the vent hole part. The downward projection is provided at a height at which the downward projection may continue sliding and climb over the contacted upward projection.

Description

  The present invention relates to a foamed resin container.

2. Description of the Related Art Conventionally, foamed resin containers are used as containers for storing objects such as fruits and vegetables (asparagus, etc.), cooling them with a refrigerator, etc., and lowering the temperature of the objects to be stored.
As this container, for example, a container main body having an opening at the upper end, a lid main body that closes the opening of the container main body, and a slidable so as to be able to open and close the vent opening. A foamed resin container having a small lid is known (for example, Patent Document 1).

JP 2006-182391 A

Since such a foamed resin container has a vent portion, an object (asparagus etc.) is accommodated in the foamed resin container, and a small lid is slid to open the vent portion. By placing the foamed resin container in the refrigerator, cold air can be taken into the foamed resin container to cool the object.
And after this cooling, when transporting the object to be stored together with the foam resin container, by sliding the small lid and closing the vent part, it becomes difficult for outside air to enter the foam resin container, High cold insulation can be maintained.

  However, such a foamed resin container has such a problem that the small lid slides carelessly during transportation and the outside air enters the foamed resin container.

  In view of the above problems, an object of the present invention is to provide a foamed resin container in which a small lid is prevented from sliding carelessly.

  That is, the present invention is formed so as to be slidable so that the container main body having an opening at the upper end, a vent opening, a lid main body that closes the opening of the container main body, and the vent opening can be opened and closed. A small lid, and the lid body is provided with a top wall positioned above the opening when the lid body is attached to the container body so as to close the opening. The small lid is formed so as to be slidable with its lower surface side slidably contacting the upper surface side of the top wall, and the lower surface side of the small lid. Is provided with a downward projection that protrudes downward, and the top wall is provided with an upward projection that protrudes upward on the upper surface side. When the small lid is slid to open and close the vent, It is provided at a position where it comes into contact with the upward projection of the ceiling wall, and is formed at a height capable of getting over the upward projection abutted to continue the slide. In the container.

  According to the present invention, since the protrusions are formed on the lower surface side of the small lid and the upper surface side of the top wall, which are slidably contacted when the small lid slides, the tip of the protrusion is used as a counterpart material. It can be hooked and locked, and inadvertent sliding of the small lid can be suppressed. Further, according to the present invention, when the small lid is slid, the projections are temporarily brought into contact with each other in the middle of the slide, and then the slide is continued over the projections. At the time of contact, the frictional force between the lower surface of the small lid and the upper surface of the top wall becomes particularly high, and the small lid is more reliably prevented from sliding carelessly.

The perspective view of the container made from a foaming resin concerning one embodiment is shown. The right view of a container main body is shown. The top view of a container main body is shown. The top view of a lid body is shown. The bottom view of a lid body is shown. The principal part sectional drawing which shows the engagement state of the convex part of the right surface of a small lid and the recessed part of the right surface of the recessed part of a ceiling wall is shown. The bottom view of a small lid is shown. The figure which shows the state which the vent hole part of the recessed part of the top wall closed was shown. The figure which shows the state which the vent-portion part of the recessed part of a top wall opened.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the foamed resin container 1 according to the present embodiment is formed in a box shape that can accommodate an object such as fruits and vegetables (for example, asparagus).
More specifically, the foamed resin container 1 according to the present embodiment has a generally rectangular parallelepiped shape as a whole, and has a vertical rectangular parallelepiped shape in which the dimension in the height direction is larger than the dimension in the width direction or the depth direction. have.
Moreover, the foamed resin container 1 according to the present embodiment is formed so that the shape in plan view is a rectangle.
In the following description, the long side direction in plan view of the container 1 is also referred to as the left-right direction (in FIG. 1, the left direction is indicated by L and the right direction is indicated by R), and the short side direction of the container 1 Is also referred to as 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 FIG. 1, the foamed resin container 1 includes a container body 2 having an opening 21 at an upper end, and a lid body 3 that closes the opening 21 of the container body 2. The lid body 3 has a vent portion 33, and the foamed resin container 1 of the present embodiment is further provided with a small lid 4 formed so as to be slidable so that the vent portion 33 can be opened and closed.

The container body 2, the lid body 3, and the small lid 4 are formed by thermally fusing foamed resin beads.
The foamed resin beads used for forming the container body 2, the lid body 3, and the small lid 4 may have the same material or different particle sizes.

  Examples of the material of the foamed resin beads include polystyrene resins such as polystyrene, and polyolefin resins such as polyethylene and polypropylene. As the material of the beads, a styrene resin is preferable in that it is more excellent in moldability.

  The polystyrene resin is obtained by polymerizing a styrene monomer. Examples of the polystyrene resin include general-purpose polystyrene resins such as styrene, methylstyrene, ethylstyrene, isopropylstyrene, dimethylstyrene, paramethylstyrene, chlorostyrene, bromostyrene, vinyltoluene, and vinylxylene. One type of monomer homopolymer or a copolymer of a plurality of these styrenic monomers can be mentioned. Moreover, a styrene-butadiene copolymer etc. are illustrated.

  As shown in FIGS. 1-3, the said container main body 2 is formed in a housing | casing shape, and is rectangular shape in planar view. In addition, the container body 2 has a sufficient accommodation space formed therein so that an object can be accommodated therein. Further, the container body 2 is formed so that an object can be taken in and out through the opening 21.

  The container body 2 includes a rectangular bottom wall 22 in a plan view and a rectangular tubular body side wall 23 erected along the outer periphery of the bottom wall 22.

  The bottom wall 22 has an upper surface and a lower surface. The upper surface of the bottom wall 22 corresponds to the bottom surface of the container body 2 and is a surface that supports an object to be accommodated (such as asparagus). The upper surface of the bottom wall 22 is a flat surface. As shown in FIG. 2, the bottom wall 22 has a convex portion 22a protruding downward at the center of the back surface. The convex portion 22a has a lower surface, and the lower surface is formed as a flat surface.

  As will be described later, the convex portion 22a is a fitting convex portion 22a formed so as to be fitted to the lid body 3 of another foamed resin container 1.

  Although the thickness of the center part of the said bottom wall 22 is not specifically limited, Usually, 5 mm-50 mm, Preferably they are 8 mm-30 mm.

As shown in FIGS. 2 and 3, the main body side wall 23 is formed in a rectangular frame shape by being raised upward from the outer peripheral edge portion of the upper surface of the bottom wall 22. Further, the main body side wall 23 is formed so that the shape of the outer contour line in a plan view is substantially the same rectangle as the bottom wall 22.
Further, as shown in FIG. 3, the main body side wall 23 includes a right side wall 23a, a left side wall 23b, a front side wall 23c, and a rear side wall 23d. The right side wall 23a and the left side wall 23b are raised upward from the left and right edges corresponding to the short side of the bottom wall 22 that is rectangular in plan view, and face each other in the left-right direction. The front side wall 23c and the rear side wall 23d are raised upward from front and rear edges corresponding to the long side of the bottom wall 22 and face each other in the front-rear direction.
Further, the main body side wall 23 is formed such that the height of the front side wall 23c from the bottom wall 22 is lower than the rear side wall 23d.
In the right side wall 23a and the left side wall 23b, a certain section (hereinafter also referred to as “front side portion”) from the front side wall 23c to the rear side wall 23d has substantially the same height as the front side wall 23c, and A fixed section (hereinafter also referred to as “rear part”) toward the side wall 23c is formed so as to be substantially the same height as the rear side wall 23d, and a section between the rear part and the front part (hereinafter referred to as “rear part”). (Also referred to as “intermediate part”) is formed to be a section in which the height is linearly changed.
That is, the main body side wall 23 has an overall shape in which the front side is recessed toward the bottom wall 22.

  Boundaries between the left and right side walls 23a and 23b and the front and rear side walls 23c and 23d are rounded. That is, the shape of the main body side wall 23 in plan view is strictly a rectangular shape with rounded corners.

  As shown in FIGS. 1 and 2, a finger hooking recess 23 e for holding the container 1 by hooking a finger is formed at the center in the front-rear direction at the lower ends of the left and right side walls 23 a and 23 b. The finger hook recess 23e is formed by recessing the left and right side walls 23a and 23b inward from the thickness direction outer surface (hereinafter simply referred to as an outer surface), and the lower end side is the lower surface of the bottom wall 22. It is extended to the back side.

  Although the thickness of the center part of the said main body side wall 23 is not specifically limited, Usually, 5 mm-50 mm, Preferably they are 8 mm-30 mm.

As shown in FIGS. 1 to 3, the main body side wall 23 has a height difference between the outer peripheral side and the inner peripheral side, and a step is formed at the upper end thereof, and the inner side of the container main body 2 is the container main body 2. It is formed one step higher than the outside.
Accordingly, when the lower portion on the outer peripheral side is viewed as a reference, the main body side wall 23 has a protrusion 23f (hereinafter referred to as “first protrusion) that circulates along the inner periphery of the upper end, as shown in FIGS. 23f ") is formed.
Incidentally, T ₀ the thickness of the central portion of the body sidewall 23, when the thickness of the first projections 23f was T _1, the first projections 23f are _{typically, (T 0/3) ≦} T 1 ≦ It is formed in a thickness satisfying (2T _0/3) relationship.
Moreover, the height (H ₀ ) of the first ridges 23f is usually 10 mm or less.

The container body 2 is preferably formed so as to draw an arc in a cross section without making the boundary between the upper surface of the bottom wall 22 and the inner surface of the body side wall 23 a right angle.
That is, the thickness of the main body side wall 23 increases as it approaches the upper surface of the bottom wall 22 near the bottom wall 22, and the rate of increase in thickness increases with increasing proximity to the upper surface of the bottom wall 22. It is formed to become.
With such a configuration, since the strength at the boundary portion between the bottom wall 22 and the main body side wall 23 becomes more excellent, the boundary portion between the bottom wall 22 and the main body side wall 23 due to a force generated when the container body 2 is lifted or the like It is possible to further suppress the occurrence of destruction in

  The lid body 3 is a lid body for closing the opening 21 to make the container body 2 substantially sealed.

As shown in FIGS. 1 and 4, the lid body 3 is positioned above the opening 21 when attached to the container body 2 so as to close the opening 21, and is a ceiling portion of the foamed resin container 1. The top wall 31 is formed. The top wall 31 is formed in a rectangular shape substantially the same as the outer contour shape of the main body side wall 23 in plan view. The top wall 31 has an upper surface and a lower surface, and a through-hole penetrating from the upper surface to the lower surface is formed. The through hole penetrating the ceiling wall 31 in the vertical direction is formed in the ceiling wall 31 so as to function as the vent portion 33 of the lid body 3. Furthermore, the top wall 31 has a recessed portion 32 that is recessed downward on the upper surface side, and the through hole used as the vent portion 33 is formed in the recessed portion 32.
The lid body 3 includes a rectangular tube-like lid side wall 34 that extends downward from the outer peripheral edge of the lower surface of the top wall 31.

As shown in FIG. 1, the lid side wall 34 extends downward from the outer peripheral edge of the top wall 31 and is integrally formed on the lower surface of the top wall 31.
Further, the lid side wall 34 has a front side that extends longer downward than the rear side, and has a protruding shape corresponding to the recessed shape of the main body side wall 23.
Accordingly, the foamed resin container 1 is formed so that the overall shape is a rectangular parallelepiped when the container body 2 is closed with the lid body 3. The foamed resin container 1 is formed such that the lid body 3 and the container body 2 are substantially flush with each other at the side surface of the rectangular parallelepiped.

The lid body side wall 34 has a level difference corresponding to the main body side wall 23 of the container main body 2, and protrudes downward longer on the inner side than on the outer side.
As a result, as shown in FIG. 5, the lid side wall 34 is provided with second ridges 34a that can be engaged with the first ridges 23f from the outside.
That is, the container 1 made of foamed resin is formed so that the container main body 2 and the lid main body 3 are fitted by engaging the first ridges 23f and the second ridges 34a.

As shown in FIG. 4, the top wall 31 includes a fitting recess 31 a formed on the surface side so as to be fitted to the fitting convex portion 22 a of the container body 2. The fitting recess 31 a is formed by forming protrusions 31 b at the four corners of the surface of the top wall 31.
In addition, this convex part 31b is formed in the shape bent in L shape along each corner | angular part of the outer periphery of the top wall surface.
And the said convex part 22a for fitting of the container main body 2 in this embodiment has the outer edge shape which provides a slight clearance inside the four convex parts 31b formed in this L-shape, and can be inserted. .
In other words, the foamed resin container 1 is one foamed resin container 1 when the container body 2 with its opening portion closed by the lid body 3 is stacked up and down to form a laminate. By fitting the fitting convex portion 22a of the container body 2 into the fitting concave portion 31a of the lid body 3 of the other foamed resin container 1, the stacked state of the laminate can be stably maintained. it can.

The top wall 31 includes the recess 32 at the center of the fitting recess 31a, and the recess 32 is a rectangle whose shape in plan view extends long in the left-right direction.
The recessed portion 32 of the top wall 31 is provided with the through hole on the front side, which serves as the vent portion 33 for communicating the inside and outside of the foamed resin container 1. That is, the top wall 31 has a through hole on the front side of the recessed portion 32, while the rear surface forms the bottom surface of the recessed portion 32 by the upper surface thereof.

As shown in FIG. 6, the side wall surface that defines the recessed portion 32 together with the bottom surface has a substantially flat surface on the front side and the rear side, while the intermediate portion in the depth direction of the recessed portion 32 is circular on the left and right. The shape is recessed in an arc.
More specifically, the top wall 31 has groove-like recesses 32 b extending in the front-rear direction on the left and right side wall portions of the recess 32.
The recess 32b in the present embodiment is formed in a semicircular cross section, and is used for engagement with a small lid 4 described later.
Hereinafter, the recess 32b is also referred to as an engagement recess 32b.

As shown in FIG. 4, the top surface of the top wall 31 has a plurality of convex portions 32 a that are circular in plan view at locations where the bottom surfaces of the concave portions 32 are formed. The circular protrusion 32a is formed by an upward protrusion 32a1 protruding upward, and specifically, is formed by a plurality of linear protrusions extending along the left and right directions. The height of the convex portion 32a (upward projection 32a1) is preferably 0.01 to 1.5 mm, more preferably 0.01 to 1.0 mm.
The size of the convex portion 32a is preferably 5 mm to 15 mm in diameter, and one convex portion 32a has 5 to 20 linear protrusions, preferably 8 to 15 linear protrusions. Is preferably provided.

  The small lid 4 is for closing the vent hole 33 of the recessed portion 32 of the top wall 31 so that the inside of the container body 2 is almost sealed.

As shown in FIGS. 1 and 7, the small lid 4 is formed in a rectangular shape in a plan view in which the left and right dimensions are substantially equal to the recessed portion 32 and the front and rear dimensions are smaller than the recessed portion 32. It is a plate-like body having a thickness substantially equal to the recessed depth of the insertion portion 32, and has an upper and lower surface, a front and rear surface, and a right and left surface.
The small lid 4 can be fitted into the recessed portion 32 of the ceiling wall 31 so that the vent portion 33 can be opened and closed, and is slidable in the longitudinal direction within the recessed portion 32. .

As shown in FIG. 6, the right and left surfaces of the small lid 4 each have a convex portion 41. The convex portion 41 protrudes with a cross-sectional shape substantially the same as the cross-sectional shape of the concave portion 32 b for engagement of the concave portion 32 of the top wall 31, and when the small lid 4 is fitted into the concave portion 32, the convex portion 41 is engaged. It can be engaged with the recess 32b.
The small lid 4 is formed so that the convex portion 41 (hereinafter also referred to as “engaging convex portion 41”) can be elastically deformed by the protruding height when fitted into the concave portion 32 of the lid main body 3. After being fitted into the recess 32, the engagement recess 32b and the engagement protrusion 41 are engaged with each other so as not to fall off from the lid body 3.
Since the engaging concave portion 32b and the engaging convex portion 41 extend in the front-rear direction, the small lid 4 can slide back and forth within the recessed portion 32 while being prevented from falling off from the lid main body 3. ing.
By sliding the small lid 4 forward, the foamed resin container 1 can close the vent portion 33 of the recessed portion 32 of the top wall 31 with the small lid 4 as shown in FIG. It is configured. Moreover, the said foamed resin container 1 can open the vent-portion 33 of the said recessed part 32 of the said top wall 31 with the small lid 4 by sliding the small lid 4 back, as shown in FIG. It is configured to be possible.

  As shown in FIG. 7, the lower surface of the small lid 4 is formed by a downward protrusion 42 a that protrudes downward so as to face the convex portion 32 a formed in the concave portion 32 of the top wall 31, and the ceiling Similar to the convex portion 32 a of the wall 31, the convex portion 42 having a circular shape in plan view formed by a plurality of downward projections 42 a is provided. Similarly to the convex portion 32a of the top wall 31, the convex portion 42 is also formed by extending a linear projection as a downward projection 42a in the left-right direction, and a direction intersecting the sliding direction of the small lid 4 It is formed by the linear protrusion extended to. The height of the convex portion 42 (downward projection 42a) is preferably 0.01 to 1.5 mm, more preferably 0.01 to 1.0 mm.

  Although the thickness of the center part of the said small lid 4 is not specifically limited, Usually, 3 mm-40 mm, Preferably it is 5 mm-20 mm.

When the small lid 4 slides, the foamed resin container 1 is in sliding contact with the bottom surface of the recessed portion 32 of the top wall 31 and the bottom surface of the small lid 4, and the bottom surface of the small lid 4. The convex portion 42 is configured to engage with the convex portion 32 a on the upper surface of the concave portion 32 of the ceiling wall 31 and to get over the convex portion 32 a on the upper surface of the concave portion 32 of the ceiling wall 31.
That is, the linear protrusions, which are the downward protrusions 42a provided on the small lid 4, cause the upward movement of the top wall 31 in the middle of the sliding when the small lid 4 is slid to open and close the vent portion 33. The protrusion 32a1 is provided at a position where it abuts with the linear protrusion, and is formed at a height that allows it to get over the upward protrusion 32a1 abutted to continue the slide.
The small lid 4 in the present embodiment is provided on the lower surface side when the small lid 4 is slid forward from the most rearward position in the recessed portion 32 until reaching the most front side. After bringing any one of the plurality of convex portions 42 into contact with any one of the plurality of convex portions 32 a provided on the upper surface side of the top wall 31, the same convex portion 42 or another convex portion 42 is It is formed so as to be in contact with the convex portion 32 a of the top wall 31.
In other words, the lid body 3 and the small lid 4 in the present embodiment are formed so that the projections can come into contact with each other multiple times in the slide.
In the present embodiment, the convex portion is formed by a plurality of linear protrusions in order to more surely prevent the small lid 4 from being inadvertently opened and closed, but the upward protrusion 32a1 and the downward protrusion 42a are It is not necessary to use a linear protrusion, and a fine conical shape or a polygonal pyramid shape may be used.

The foamed resin container 1 can be manufactured by a general method.
Specifically, the container main body 2, the lid main body 3, and the small lid 4 can be manufactured by employing, for example, an in-mold foam molding method using a mold.

In the in-mold foam molding method using a mold, raw material beads (preliminary foam beads) are filled in a molding die, and the raw material beads can be heated by steam to expand the raw material beads. By expanding the raw material beads in a molding die whose space volume is limited to a predetermined amount, the gaps between the foamed beads can be filled and the beads can be fused and integrated. Then, after cooling, the mold can be removed and finally a container body of a predetermined shape can be manufactured.
In addition, as a raw material bead, what is marketed can be used. Examples of the material of the raw material beads include those described above as the material of the foam beads.

  Since the foamed resin container 1 of the present embodiment is configured as described above, it has the following advantages.

That is, the foamed resin container 1 of the present embodiment includes a container body 2 having an opening 21 at the upper end, a vent hole 33, and a lid body 3 that closes the opening 21 of the container body 2; The small lid 4 is formed so as to be slidable so that the vent hole 33 can be opened and closed. The lid body 3 is provided with a ceiling wall 31 that is positioned above the opening 21 when the lid body 3 is attached to the container body 2 so as to close the opening 21 and penetrates the ceiling wall 31 vertically. The vent portion 33 is formed. The small lid 4 is formed so as to be slidable with its lower surface side in sliding contact with the upper surface side of the top wall 32. The small lid 4 is provided with a downward protrusion 42a protruding downward on the lower surface side, and the ceiling wall 31 is provided with an upward protrusion 32a1 protruding upward on the upper surface side. Yes. The downward protrusion 42a is provided at a position where the downward protrusion 42a contacts the upward protrusion 32a1 of the top wall 31 in the middle of the sliding when the small lid 4 is slid to open and close the vent 33. It is formed so as to be able to get over the upward projection 32a1 abutted to continue the slide.
According to the foamed resin container 1, since the protrusions are formed on the lower surface side of the small lid 4 and the upper surface side of the top wall 31 that are slidably contacted when the small lid 4 slides, The tip of the protrusion can be hooked and locked on the mating member, and inadvertent sliding of the small lid 4 can be suppressed. In addition, since the foamed resin container 1 is configured so that, when the small lid 4 is slid, the protrusions are once brought into contact with each other during the sliding, and then the sliding is continued over the protrusions. When the projections are in contact with each other, the frictional force between the lower surface of the small lid 4 and the upper surface of the top wall 31 is particularly high, and the small lid 4 is more reliably prevented from sliding carelessly. .

Further, in the foamed resin container 1 of the present embodiment, the downward projection 42 a and the upward projection 32 a 1 extend in a direction that intersects the sliding direction of the small lid 4. It is a protrusion.
According to such a foamed resin container 1, due to the linear protrusion, the frictional force between the lower surface of the small lid 4 and the upper surface of the top wall 31 is further increased when the protrusions are in contact with each other. Inadvertent sliding of the small lid 4 is further reliably suppressed.

In addition, although the foamed resin container 1 of this embodiment is as the said illustration, this invention is not limited to the foamed resin container of the said illustration.
Moreover, the various aspects generally used in a foamed resin container can be employed as long as the effects of the present invention are not impaired.

1: foamed resin container, 2: container body, 3: lid body, 4: small lid,
21: Opening part, 22: Bottom wall, 22a: Convex part (convex part for fitting),
23: Body side wall, 23a: Right side wall, 23b: Left side wall, 23c: Front side wall, 23d: Rear side wall, 23e: Recess for finger hooking, 23f: First protrusion
31: Ceiling wall, 31a: concave portion for fitting, 31b: convex portion, 32: concave portion, 32a: convex portion, 32a1: upward projection, 32b: concave portion (concave concave portion), 33: vent portion, 34: lid Body side wall, 34a: second ridge,
41: convex part (engaging convex part), 42: convex part, 42a: downward projection

Claims (2)

A container body having an opening at the upper end;
A lid body having a vent and closing the opening of the container body;
A small lid formed to be slidable so as to open and close the vent part,
The lid body is provided with a ceiling wall that is positioned above the opening when attached to the container body so as to close the opening, and the ventilation formed by vertically penetrating the ceiling wall It has a mouth,
The small lid is formed to be slidable by sliding the lower surface side to the upper surface side of the top wall,
The lower surface side of the small lid is provided with a downward projection that protrudes downward, and the top wall is provided with an upward projection that protrudes upward on the upper surface side,
The downward projection is provided at a position where it comes into contact with the upward projection of the top wall in the middle of the sliding when the small lid is slid to open and close the vent portion, and to continue the sliding A foamed resin container characterized in that it is formed at a height that allows it to climb over the contacted upward projection.   The foamed resin container according to claim 1, wherein the downward protrusion and the upward protrusion are linear protrusions extending along a direction intersecting a sliding direction of the small lid.

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