JP5814656B2 - Foamed resin container - Google Patents

Description

  The present invention relates to a container made of foamed resin mainly used for transporting fish such as squid in the cold state.

  In recent years, a container made of foamed resin consisting of a container body and a lid as a container such as a fish box for storing fish immediately after landing with ice at a port or on a ship and transporting them to the market or from the market to a store. However, it is widely used because of its moderate strength, light weight, and heat insulation (Patent Document 1).

  Such a container is composed of a container main body and a lid body that is attachable to the container main body, so that the lid body does not come off on its own when handling fish. It is desired that the lid body can be held in an attached state. Usually, the lid body is attached to the opening end portion of the container body, and the opening end portion of the container body and the lower surface of the peripheral edge portion of the lid body corresponding thereto In addition, a convex edge and a concave groove that are fitted to each other are provided so that the lid can be attached in a fitted state. In particular, when the attached state of the lid may become unstable, the butted portion of the lid and the container body is stopped with an adhesive tape.

  However, when the fish to be accommodated is a squid, it is required to be relatively quick and easy to open and close, so the lid can be attached to the container body without using adhesive tape. In order to prevent the protrusion from being easily detached, an engagement means using an undercut convex portion and a concave portion is often provided at the fitting portion between the convex edge and the concave groove.

  For example, in the case of Patent Document 1, in the fitting structure in which the convex edge provided at the opening end portion of the container body and the concave groove provided in the lower surface of the peripheral edge portion of the lid body are engaged, it is engaged in the removal direction. An inverted taper bulging portion is provided over the entire circumference in the container circumferential direction of the fitting portion formed by the convex edge and the concave groove.

  By the way, when it is used as a squid box, it is common in the market to remove the lid and hang it on the “seri” while looking at the contents. It is often transported up to Even during transportation, the lid may be opened to confirm the contents. In this way, in the use as a fish box such as squid, it is necessary to open and close the lid several times. In the case of a structure that fits firmly so as not to be disengaged, the opening / closing operation is not easy, and the lid body may be broken or damaged particularly during the opening operation, and the subsequent use may not be possible.

  For example, the convex edge of the container body and the side wall portions inside and outside the concave groove of the lid body are more rigid at the corner portion than the side portion and are less likely to be elastically deformed. The engagement by the engagement means provided in the fitting part by the convex edge and the concave groove is difficult to disengage, and a handle part for opening the lid is provided at a place other than the corner part. If the lid is lifted upward at the handle portion for the lid opening operation, a strong force acts locally, and the lid may be broken or broken. Further, when the lid is lifted upward from the position of the handle portion provided in the vicinity of the corner portion, the lid may be deformed so as to warp upward, and there is a possibility that cracks or the like may eventually occur.

Japanese Patent Laid-Open No. 11-100069

  The present invention has been made in view of the above, and as a container made of foamed resin having a structure in which a lid is attached to an opening end of a container body by a fitting structure, the container is elastically fitted to a fitting part. By providing the engaging means for engaging, the lid attached state can be stably maintained, and the lid body can be easily opened and closed with respect to the container body. To provide a container made of foamed resin that can be used as it is without being damaged, and can be used as a squid box or other fish box that can be repeatedly opened and closed. It is.

  The present invention that solves the above problems comprises a flat rectangular container body that opens upward, and a lid that can be attached to the container body, and an opening end of the container body and a peripheral edge of the lid. In addition, a fitting portion including a convex edge and a concave groove that are continuously fitted over the entire circumference is provided, and a lid cover is provided on a side surface of the convex edge and a side surface of the concave groove corresponding to the side surface. A foamed resin container provided with an undercut-shaped engaging means that elastically fits and engages in the removal direction when worn, wherein the engaging means is formed by the convex edge and the concave groove. It is characterized in that it is provided on the side part except at least the corner part of the container among the fitting parts.

  According to this container, since the fitting strength is increased by the engagement of the undercut-shaped engaging means of the fitting portion between the convex edge and the concave groove, the lid body can be removed without permission in handling such as transportation. The lid attached state can be maintained with good stability. In addition, since the above-mentioned engaging means is excluded at the corner portion that is difficult to be elastically deformed, the fitting between the convex edge and the concave groove is not excessively strong at the corner portion, and the lid is opened during the opening operation. By lifting the body, it is possible to disengage the engagement means without requiring a strong force starting from the corner, and to release the convex edge and the concave groove from the fitted state, making it easy to open the lid. it can.

Further, in the container made of foamed resin, a handle for opening operation is provided on at least one of the opening end portion of one or both opposite side walls of the container main body and the side portion of the lid corresponding thereto. parts are provided, the engaging means, without intermittent shape at intervals in the circumferential direction, it shall become disposed except a portion corresponding to the working portion.

  That is, since the locking means is provided in an intermittent manner, the fitting operation at the time of closing and the fitting at the time of opening are compared with the case where the engaging means is provided over the entire circumference including the corner portion. Since the joining / removing operation is easy and there is no engaging means at the portion corresponding to the handle portion, the lid body is lifted from the position of the handle portion during the lid opening operation. With the portion corresponding to the handle portion as a starting point, the engaging means can be easily disengaged from the engaging end portion of the peripheral hook, and the lid can be easily opened.

  In particular, when the handle portion is provided in the vicinity of the corner portion of the container, and the engaging means is provided so as to continuously remove portions corresponding to the corner portion and the handle portion, By the opening operation, the engagement by the engagement means can be easily released and the fitting can be released.

  As described above, when the engagement means is provided except for the handle portion, it is preferable that the displacement amount of the engagement means from the handle portion is within 50 mm. That is, when the lid is opened by lifting the lid from the position of the handle portion, the corner portion or the handle portion having no engagement means has a smaller separation resistance from the fitted state, while the engagement Since the separation resistance is large in the portion having the means, the lid body lifted from the handle portion is deformed so as to warp upward, and the deformation becomes larger as the displacement amount increases, so the displacement amount as described above. Is preferably set to 50 mm or less.

  The engaging means is a concave portion and a convex portion provided so as to be fitted and engaged with each other on the outer side surface of the convex edge and the inner side surface of the outer wall portion of the concave groove.

  In the foamed resin container, the inner wall portion of the concave groove of the lid protrudes downward longer than the outer wall portion, and a position corresponding to the lower end surface of the outer wall portion on the groove inner surface of the inner wall portion Are provided with circumferential ridges that are fitted to the ridges when the ridges are fitted into the concave grooves at corresponding positions on the inner surface of the ridges. Those are preferred. That is, when the lid is attached to the container body, the lower end portion of the inner wall portion of the concave groove is fitted to the inside of the convex edge up to the position of the convex strip and held in a horizontal posture, and then the convex strip is By pushing the lid downward so as to be elastically deformed, the concave groove can be fitted to the convex edge, the engaging means can be engaged, and the lid closing operation can be easily performed. In this state, the cover adherence state is stably maintained by fitting the ridges with the ridges.

  In the above-mentioned foamed resin container, a container used for a fish box, wherein the upper surface of the bottom part is inclined from the central part in the longitudinal direction toward both end parts, and drainage holes are provided at the four corners. can do. In this case, as a container for squid or the like that spouts black ink, the side surface is less likely to get dirty and can be suitably used.

  According to the container made of foamed resin of the present invention, when the lid is attached to the container main body by fitting the convex edge of the opening end of the container main body and the concave groove on the lower surface of the peripheral edge of the lid, the convex edge By providing the engagement means that elastically engages the groove and the concave groove, not only can the lid attached state be stably maintained, but in particular, the engagement means excludes a corner portion that is difficult to elastically deform. Therefore, the fitting between the convex edge and the groove does not become excessively strong at the corner, and the lid is lifted during the lid opening operation, so that the corner can be removed without applying a strong force. The engagement means can be disengaged as a starting point, and therefore, the fitting of the convex edge and the concave groove can be removed without causing excessive warp deformation or the like in the lid, and the lid can be easily opened. it can.

  Since the container of the present invention does not cause excessive warping deformation in the lid as described above, the lid can be prevented from cracking or breaking during the opening / closing operation, and can be used without problems after that. it can. In particular, in the case where a handle for opening the lid is provided, the above-described effect becomes more remarkable by providing the engagement means except for a portion corresponding to the handle.

  Therefore, the container of the present invention can be suitably used as a fish box such as a squid box that can be repeatedly opened and closed.

It is the perspective view of the state which isolate | separated the container main body and cover body of the container made from foamed resin concerning this invention, and the cover body was turned over. It is a perspective view of the upper surface side of the cover body of a container same as the above. It is the top view (a) and bottom view (b) of the container main body of a container same as the above. It is the top view (a) and bottom view (b) of a cover body. It is a half vertical front view before fitting and attaching a cover to the container main body of a container same as the above. It is sectional drawing in the L1-L1 line | wire of FIG. 3 of the state which fitted and attached the cover body to the container main body of a container same as the above. It is sectional drawing in the L2-L2 line | wire of FIG. 3 of the state which fitted and attached the cover body to the container main body of a container same as the above. It is a partial enlarged plan view of the container main body (a) and the lid lower surface side (b) of the same container. It is an expanded sectional view before a part fitting of a container same as the above. It is an expanded sectional view after a fitting same as the above.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  The container of this embodiment is a container molded from a foamed resin such as expanded polystyrene, and is a flat rectangular container body 10 that opens upward, and a lid 30 that can be attached to the container body 10. It becomes more.

  In the said container, the convex edge 12 and the ditch | groove 32 which mutually fit continuously over the perimeter to the opening end part 11 by the side wall upper end part of the container main body 10, and the lower surface of the peripheral part 31 of the said cover body 30 are provided. Is provided. Specifically, as shown in the figure, the outer half of the opening end 11 of the container body 10 is cut out over the entire circumference to form a cutout step portion 13. About half is formed as the convex edge 12. Further, a concave groove 32 is formed on the lower surface of the peripheral edge portion 31 of the lid body 30 so as to be fitted in the convex edge 12 in the cover body attached state in the circumferential direction. A wall portion 33 is fitted into the cutout step portion 13, and an inner wall portion 34 of the concave groove 32 is fitted into the convex edge 12. In the case of the figure, the inner wall 34 of the groove 32 is formed to protrude downward longer than the outer wall 33, and when the lid 30 is attached to the container body 10, the inner wall 34 of the groove 32 is formed. The concave groove 32 can be easily fitted to the convex edge 12 by pushing the lid 30 downward after the lower end portion is fitted inside the convex edge 12 and positioned. In the figure, reference numeral 14a denotes a side wall facing the long side of the container body 10, and reference numeral 14b denotes a side wall on the short side.

  Then, the elastic deformation of the foamed resin material is applied to the side surface of the convex edge 12, for example, the outer side surface 12a, and the side surface of the concave groove 32 corresponding to the side surface, for example, the inner side surface 33a of the outer wall 33 when the lid is attached. There are provided undercut-shaped engaging means 15 and 35 which are elastically engaged and engaged in the removal direction. In particular, in the case of the present invention, the engaging means 15 and 35 are provided on the side portions except for at least a portion corresponding to the corner portion of the container among the fitting portions formed by the convex edges 12 and the concave grooves 32. .

  For example, as shown in FIGS. 8 and 9 in an enlarged manner, the outer surface 12a of the convex edge 12 is inclined inward from the tip of the convex edge 12 toward the base side as the engaging means 15. The reverse tapered recess 15a is formed on the groove inner side surface 33a formed by the outer wall 33 of the concave groove 32, and is inclined so as to gradually protrude inward toward the lower end of the outer wall 33. The portions 35a are provided intermittently at predetermined positions in the side portions excluding the corner portions, mainly at predetermined intervals in the circumferential direction, and when the convex edges 12 and the concave grooves 32 are fitted, the concave portions 15a are provided. The convex portion 35a can be fitted using the elasticity of the material and engaged in the removal direction. Contrary to the above, a convex portion can be provided on the outer surface of the convex edge 12, and a concave portion can be provided on the inner surface of the groove 32. In any case, it is preferable that the end of the concave portion 15a and the corner of the tip end of the convex portion 35a are slightly rounded to facilitate elastic deformation during fitting. Needless to say, it is possible to implement with an undercut-shaped engaging irregularity other than the concave portion 15a and the convex portion 35a.

  In the case of the illustrated embodiment, one or both side walls of the container main body 10, that is, the opening end 11 of the long side wall 14 a and / or 14 b, and the side of the lid 30 corresponding thereto. A handle 16 for opening the lid is provided at the opening end 11 of the container body 10 at least one of the two. The engaging means 15 and 35 are intermittently spaced apart from each other in the circumferential direction, and are provided except for a portion corresponding to the handle portion 16. By lifting the lid body 30 from above, the engagement of the engagement means 15 and 35 can be easily removed from the engagement end portion in the circumferential direction.

  As shown in the figure, the handle 16 is often provided near the corner of the container. In this case, the engaging means 15 and 35 are connected to the container according to the arrangement of the handle 16. It is preferable that the portions corresponding to the corner portion and the handle portion 16 are continuously removed so as to be intermittently provided on the side portion, whereby the engagement means 15 and 35 can be more easily engaged and disengaged. It will be.

  In the case where the engaging means 15 and 35 are provided except for the portion corresponding to the handle 16 as described above, the shift amount a of the engagement means 15 and 35 from the handle 16 is set to 50 mm or less. And That is, when the lid 30 is lifted up by lifting the lid 30 from the position of the handle 16, the detachment resistance from the fitted state at the corner portion or the portion of the handle 16 that does not have the engaging means 15, 35. On the other hand, since the detachment resistance is large in the portion having the engaging means 15 and 35, the lid body 30 lifted from the handle portion 16 is deformed so as to warp upward, and the deformation is the amount of deviation described above. Therefore, the shift amount a is preferably set to 50 mm or less, more preferably 30 mm or less, as described above.

  In the illustrated embodiment, the groove inner side surface 34a of the inner wall portion 34 is formed to protrude downward longer than the outer wall portion 33 of the concave groove 32 at a height position corresponding to the lower end of the outer wall portion 23. In addition, a circumferential ridge 37 having an arcuate cross section is provided, and a corresponding position when the inner surface of the convex edge 12 of the container body 10 is fitted, that is, when the convex edge 12 and the concave groove 32 are fitted. At a position corresponding to the ridge 37, a circumferential recess 17 having a circular arc shape in section is provided to which the ridge 37 is elastically fitted. Accordingly, when the lid 30 is attached to the container body 10, the lower end portion of the inner wall portion 34 of the concave groove 32 is fitted inside the convex edge 12 to the position of the convex strip 37 and held in a horizontal posture. After that, by pushing the lid 30 downward so as to elastically deform the ridges 37, the concave grooves 32 can be fitted to the convex edges 12, and the engaging means 15, 35 can be engaged. The lid closing operation can be easily performed.

  In the case of the container of the embodiment, a convex portion 19 extending in the longitudinal direction is provided on the upper surface 18a of the bottom portion 18 of the container body 10 so that it can be suitably used as a fish box such as a squid box, particularly a squid box. The upper surface of the bottom portion 18 and the upper surface of the convex portion 19 are formed as inclined surfaces that are slightly inclined from the central portion in the longitudinal direction toward both end portions, and further, the bottom portion. Drain holes 20 are provided in the four corners of the upper surface 18a of the 18 so as to communicate with the outside of the container.

  The drainage hole 20 communicates with a vertical hole 22 penetrating in a vertical direction provided at a corner portion of the container body 10 from a recess 21 dropped from the upper surface 18 a of the bottom portion 18. It can be drained. In particular, vertical corners 42 in the vertical direction communicating with the longitudinal holes 22 when the lid is attached are provided at the four corners of the lid 30 attached to the container body 10, and a plurality of lids are attached. When the containers are stacked, the water discharged from each container can be continuously drained to the bottom of the lowermost container. Thereby, even as a container for squid or the like that spouts black ink, the side surface is less likely to get dirty and can be suitably used.

  On the upper surface of the peripheral edge portion 31 of the lid body 30, a stacking protrusion 44 is provided that fits with the notch 24 on the lower surface peripheral edge portion of the bottom 18 of the container body 10 during stacking. In addition, a recess 45 is provided on the inside of the fitting projection 44 at the four corners to guide water overflowing on the lid to the vertical hole 42. Reference numeral 25 in the figure denotes a recess for handling when the container is carried.

  Examples of the foamed resin that is a constituent material of the container body 10 and the lid 20 include styrene-modified polyolefin resin, polystyrene, high impact polystyrene, styrene-ethylene copolymer, styrene-maleic anhydride copolymer, and styrene-acrylonitrile. Polystyrene resins such as copolymers, polyolefin resins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymers, and foams of various synthetic resins such as polyester resins such as polyethylene terephthalate can be used. Especially, the molded object by the bead foam of a styrene modified polyolefin resin is used suitably. The styrene-modified polyolefin resin is obtained by impregnating and polymerizing a polyolefin resin particle with a styrene monomer. Among the styrene-modified polyolefin resins, a styrene-modified polyethylene resin is preferable, for example, a styrene component The ratio is 40 to 90% by weight, preferably 50 to 85% by weight, more preferably 55 to 75% by weight. The foaming ratio of the foam is preferably 10 to 70 times.

  The molded product of the styrene-modified polyolefin resin bead foam is stronger than the molded product of the polypropylene resin beads having the same expansion ratio, and the shrinkage rate when a container having a depth exceeding 500 mm is molded. Low dimensional accuracy. Furthermore, there is an advantage that powder due to rubbing is less likely to be produced as compared with foamed molded products of styrene resin beads.

  According to the container made of the foamed resin of the above-described embodiment, by fitting the convex edge 12 at the opening end portion 11 of the container body 10 and the concave groove 22 at the lower surface side of the peripheral edge portion 31 of the lid body 30, When the lid 30 is attached to the container body 10, the lower end portion of the inner wall portion 34 of the concave groove 32 is fitted inside the convex edge 12 to the position of the convex strip 37, as shown by a chain line in FIG. 9. After positioning and holding in a horizontal posture, the concave groove 32 can be easily fitted to the convex edge 12 by pushing the lid 30 downward so as to elastically deform the ridge 37, and this fitting The engagement means 15 and 35 having an undercut shape at the joint can be easily and reliably engaged (FIG. 10), and the lid closing operation can be easily performed.

  And, in the attached state of the lid 30, the fitting strength is enhanced by the engagement of the undercut engagement means 15, 35 of the fitting portion between the convex edge 12 and the concave groove 32. In handling such as transportation, the lid 30 does not come off without permission, and the lid attached state can be stably maintained. In addition, since the engaging means 15 and 35 are excluded at the corner portion that is not easily elastically deformed, the fitting between the convex edge 12 and the concave groove 32 is not excessively strong at the corner portion, and the lid is opened. For example, by lifting the lid 30 from the position of the handle 16 at the time of operation, the engaging means 15 and 35 are further attached to the corresponding portions of the handle 16 starting from a corner portion that does not have the engaging means 15 and 35. If not, the engagement means 15 and 35 are disengaged from the position of the handle portion 16 without requiring a strong force, and the convex edge 12 and the concave groove 32 are disengaged from the fitted state. Therefore, the lid 30 can be easily opened without subjecting the lid 30 to large warp deformation.

  Therefore, it is possible to prevent the lid body 30 from being broken or damaged during the opening and closing operation, and can be used without any problems as it is, and it is particularly suitable for use as a fish box such as a squid box that can be repeatedly opened and closed. can do.

  DESCRIPTION OF SYMBOLS 10 ... Container main body, 11 ... Opening edge part, 12 ... Convex edge, 12a ... Outer side surface, 12b ... Inner side surface, 13 ... Notch step part, 14a ... Side wall on the long side, 14b ... Side wall on the short side, 15 ... Engaging means, 15a ... concave portion, 16 ... handle portion, 17 ... concave line, 18 ... bottom portion, 18a ... top surface, 19 ... convex portion, 20 ... drainage hole, 21 ... concave portion, 22 ... vertical hole, 24 ... notch portion, 25 .. Concave portion for covering, 30... Lid, 31 .. peripheral edge portion, 32 .. concave groove, 33 .. outer wall portion, 33 a .. inner side surface of groove, 34. 37 ... convex line, 42 ... vertical hole, 44 ... fitting convex part, 45 ... concave part.

Claims (7)

It consists of a flat rectangular container body that opens upward, and a lid that can be attached to the container body, and is fitted to the opening end of the container body and the peripheral edge of the lid continuously over the entire circumference. A fitting portion is formed by a convex edge and a concave groove to be joined, and is elastically fitted to and removed from the side surface of the convex edge and the side surface of the concave groove corresponding to the side surface when the lid is attached. A container made of foamed resin provided with an undercut-shaped engaging means that engages in a direction,
Said engaging means, Ri Na provided on a side portion except for a corner portion of at least the container of the fitting portion by said tongue and groove,
The engaging means for opening operation is provided on at least one of the opening end of one or both opposing side walls of the container body and the side of the lid corresponding thereto, and the engaging means However, the container is made of a foamed resin, which is provided in an intermittent manner with intervals in the circumferential direction, except for a portion corresponding to the handle portion. 2. The foamed resin according to claim 1 , wherein the handle is provided in the vicinity of a corner portion of the container, and the engaging means is provided so as to continuously remove portions corresponding to the corner portion and the handle. Made of containers. The foamed resin container according to claim 1 or 2 , wherein a displacement amount of the engaging means from the handle portion is within 50 mm. Said engaging means, said in a groove side surface of the outer wall portion of the outer surface and the concave grooves of the convex edge of claims 1 to 3 as a recess and a protrusion provided so as to fit to engage with one another The foamed resin container according to any one of the above items. The inner wall portion of the concave groove of the lid body projects downward longer than the outer wall portion, and a circumferential ridge is provided at a position corresponding to the lower end surface of the outer wall portion on the groove inner surface of the inner wall portion. with a corresponding position on the inner surface of the convex edge, one tongue of the ridge and mating circumferential direction of the concave becomes is provided according to claim 1-4 when fitted into the groove 1 The container made of foamed resin according to the item. A container for use in fish boxes, the upper surface of the bottom portion is inclined toward both ends from the central portion in the longitudinal direction, in any one of claims 1 to 5, the water drain hole at the four corners thus provided The container made of foamed resin as described. It is a container used for squid boxes, The container made from foamed resin of any one of Claims 1-6 .

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