JP5462035B2 - Cooling tray - Google Patents

Description

  The present invention relates to a cooling tray that is stored and used in a freezer compartment of a refrigerator or a freezer, for example.

  Conventionally, a technology for accelerating food freezing in a freezing chamber by storing a cooling tray filled with a regenerator in a freezer compartment of a refrigerator or a freezer and placing food on the cooling tray is known ( For example, see Patent Document 1). The cooling tray of patent document 1 is comprised from the synthetic resin or metal cold storage agent container 100 with which the cold storage agent T was enclosed inside, and the metal plate M arrange | positioned on the cold storage agent container 100 ( (See FIG. 3 (a)). In a freezing room in which such a cooling tray is stored, when food is placed on the metal plate M of the cooling tray, the food is heated by the cold storage agent T in the cooling tray in addition to the cold air supplied to the freezing room. Is deprived of, so the temperature drops rapidly and becomes frozen.

Japanese Patent Laying-Open No. 2005-083629

  By the way, it is preferable to form the cool storage container 100 of the cooling tray from a synthetic resin rather than a metal from the viewpoint of ease of molding and cost. However, the synthetic resin cold storage agent container has a drawback that it is more easily deformed than the metal cold storage agent container, and the cold storage agent container 100 and the metal plate M are in close contact due to the deformation of the cold storage agent container 100. There was a problem that the performance decreased. Specifically, when the internal pressure of the cool storage agent container 100 increases during the freezing and expansion of the cool storage agent T, the cool storage agent container 100 expands and deforms so that the center portion expands outward (see FIG. 3B). At this time, peeling occurs between the peripheral edge portion of the metal plate M and the cool storage agent container 100, and the adhesion between the cool storage agent container 100 and the metal plate M decreases. And if the adhesiveness of the cool storage agent container 100 and the metal plate M falls, the heat | fever of the food mounted on the metal plate M cannot fully be transmitted to the cool storage agent T in the cool storage agent container 100, and cooling Reduces the cooling capacity of the tray.

  The present invention has been made in view of such conventional circumstances, and the object thereof is to suppress the deformation of the cold storage container made of synthetic resin caused by the freezing expansion of the cold storage agent, and to store the cold storage container and the metal It is providing the cooling tray which can ensure suitably adhesiveness with a board.

  In order to achieve the above object, the cooling tray according to claim 1 is a cooling tray in which a cool storage agent is enclosed in a synthetic resin cool storage agent container having a hollow box shape, A metal plate is embedded in the upper wall with a part of the upper surface exposed to the outside, and an upper surface support portion that covers a peripheral portion of the upper surface of the metal plate is provided on the upper wall.

  According to the said structure, the upper wall of the cool storage agent container formed with a synthetic resin is reinforced by embedding the metal plate conventionally arrange | positioned on the cool storage agent container in a cool storage agent container. As a result, even when a force for deforming the cool storage agent container is applied due to an increase in internal pressure during freezing and expansion of the cool storage agent, it is possible to suppress the deformation of the upper wall, and the adhesion between the upper wall and the metal plate Sex can be secured. Moreover, since the upper surface support part which covers the upper-surface periphery part of a metal plate is provided in the upper wall, peeling of the metal plate from a cool storage agent container can be prevented.

  A cooling tray according to a second aspect is the invention according to the first aspect, wherein in the cold storage agent container, a lower surface support portion that covers a lower surface of the metal plate is provided on the upper wall, and the lower surface support portion and the lower wall are provided. In between, there is provided a restricting portion having a distal end fixed to the lower surface support portion and a proximal end fixed to the lower wall.

  According to the said structure, a control part becomes a pillar which supports between the lower surface support part and lower wall of the upper wall of a cool storage agent container, and keeps the space | interval between the lower surface support part and lower wall of an upper wall constant. be able to. This suppresses deformation of the regenerator container such as deformation (expansion deformation) that increases the distance between the lower surface support portion and the lower wall of the upper wall and deformation (warping) that attempts to narrow the distance. Can do.

  The cooling tray according to a third aspect is the invention according to the second aspect, wherein the tip of the restricting portion is fixed to a portion located below the upper surface support portion in the lower surface support portion. It is characterized by.

  When the metal plate is embedded in the upper wall with a part of the upper surface exposed to the outside, the force to deform the upper wall generated when the cold storage agent freezes is supported from the upper surface support part to the lower surface support. There is a tendency to concentrate on the part surrounding the peripheral part of the metal plate reaching the peripheral part of the part. In the above configuration, the restriction portion is formed in the lower surface support portion located below the upper surface support portion, and the strength of the portion surrounding the peripheral portion of the metal plate is increased by integrating the same portion and the restriction portion. It is increasing. Thereby, the deformation | transformation of the cool storage agent container at the time of the freezing expansion | swelling of a cool storage agent can be suppressed more effectively. Moreover, the deformation | transformation of the site | part surrounding the peripheral part of the metal plate in an upper wall causes peeling of the metal plate from an upper wall. Therefore, according to the said structure, peeling of the metal plate from an upper wall can be prevented more effectively by suppressing the deformation | transformation of the site | part surrounding the peripheral part of the metal plate in an upper wall.

  A cooling tray according to a fourth aspect is the invention according to any one of the first to third aspects, wherein a lower surface support portion that covers the lower surface of the metal plate on the upper wall and an outer side of the lower surface support portion. In addition, a bulging portion that bulges upward from the lower surface support portion is provided.

  As a method for suppressing the deformation of the cool storage agent container at the time of freezing and expansion of the cool storage agent, a method of previously providing a space portion as an expansion allowance that allows an expansion during freezing expansion in the cool storage agent container, that is, a liquid for the cool storage agent container A method in which the filling rate of the cold storage agent in the state is less than 100% is conceivable. However, when such a method is adopted, a non-contact portion (space portion) is generated between the upper wall of the cool storage agent container and the cool storage agent when the cool storage agent is frozen, and the thermal conductivity between the upper wall and the cool storage agent is reduced. May decrease.

  On the other hand, in the said structure, the bulging part is formed in a part of upper wall. For this reason, it is possible to enclose the cold storage agent in a liquid state so that the liquid surface is positioned higher than the lower surface support portion while leaving a space portion as an expansion allowance in the bulging portion. When the cool storage agent is sealed in this way, when the cool storage agent is frozen, a non-contact portion (space portion) generated between the upper wall and the cool storage agent is formed in the bulging portion. The lower surface support part located below and the cool storage agent can be brought into full contact. Therefore, it is possible to suitably ensure the thermal conductivity between the metal plate, the lower surface support portion, and the cool storage agent while obtaining the deformation suppressing effect of the cool storage agent container by providing the expansion allowance in the cool storage agent container.

  The cooling tray according to claim 5 is the melt flow rate defined in (A) JISK6922-1 as a base material in the invention according to any one of claims 1 to 4. Is formed of a resin material that contains a high-density polyethylene resin that is 0.01 to 10.0 g / 10 min, and further contains (B) an ethylene-α-olefin copolymer and (C) a spherical filler. Features.

  The cooling tray according to claim 6 is the invention according to claim 5, wherein the resin material is 25-60 mass% of the (A) high-density polyethylene resin, and (B) ethylene-α-olefin copolymer. It contains 10 to 25% by mass of coalescence and 30 to 50% by mass of the (C) spherical filler.

  According to the structure of invention of Claim 5 and 6, the deformation | transformation of the cool storage agent container based on the shrinkage | contraction of a synthetic resin produced at the time of cooling after blow-molding a cool storage agent container can be suppressed.

  According to the cooling tray of the present invention, while the cool storage agent container is formed of a synthetic resin, the cool storage agent container is prevented from being deformed due to the freezing and expansion of the cool storage agent, and the close contact between the cool storage agent container and the metal plate is achieved. Property can be suitably secured.

(A) is a perspective view of a cooling tray, (b) is a fragmentary sectional view of a cooling tray. XX sectional drawing of Fig.1 (a). (A) is sectional drawing of the conventional cooling tray, (b) is sectional drawing of the cooling tray of an expansion deformation state.

Hereinafter, the cooling tray of this invention is demonstrated based on drawing.
As shown in FIG. 1A, the synthetic resin cold storage container 1 is formed in a hollow rectangular box shape having an upper wall 10, a lower wall 20, and four peripheral walls 30. And the accommodation space S for enclosing the cool storage agent T in the inside of the cool storage agent container 1 is formed.

  As shown in FIGS. 1 (a) and 1 (b), the upper wall 10 of the regenerator container 1 is provided with a flat portion 11 that forms a central portion and a frame-like bulging portion 12 that forms a peripheral portion. It has been. A metal plate M is embedded in the flat portion 11 with the central portion of the upper surface exposed to the outside. Specifically, the entire lower surface of the metal plate M is covered by the lower surface support portion 11 a of the flat surface portion 11, the peripheral portion of the upper surface is covered by the upper surface support portion 11 b of the flat surface portion 11, and the side edges of the flat surface portion 11 are further covered. The side edge is covered with the support portion 11c. And the upper surface support part 11b prevents peeling of the metal plate M from the lower surface support part 11a by supporting the metal plate M from the upper surface side.

  Further, the frame-like bulging portion 12 positioned around the flat portion 11 is formed to bulge upward from the flat portion 11. As shown in FIG. 2, an accommodation space S is also formed inside the bulging portion 12, and the accommodation space S in the bulging portion 12 is formed so as to reach above the lower surface support portion 11a. ing.

  As shown in FIGS. 1B and 2, the lower wall 20 of the cool storage agent container 1 is provided with a plurality of first frustoconical first restriction portions 21 that bulge toward the upper wall 10 side. . The first restricting portion 21 is formed integrally with the lower surface support portion 11a, with the tip surface 21a fused to the lower surface support portion 11a of the upper wall 10. In the present embodiment, the first restricting portions 21 are provided at a total of six locations on both the four corners of the lower surface support portion 11a and both sides of the central portion on the long side, and the tip surfaces 21a of the upper surface support portion 11b in the lower surface support portion 11a. It is provided so as to be fused to a portion located on the lower side. Here, it is assumed that at least a part of the front end surface 21a of the first restricting portion 21 is fused to a portion located below the upper surface support portion 11b in the lower surface support portion 11a.

  The 1st control part 21 suppresses deformation | transformation of the cool storage agent container 1, such as expansion deformation and curvature. In other words, the state in which the cool storage agent container 1 is expanded and deformed can be said to be a state in which the interval between the upper wall 10 and the lower wall 20 of the cool storage agent container 1 is partially or entirely expanded. Such expansion and deformation of the regenerator container 1 is caused, for example, by an increase in the internal pressure of the storage space S during the freezing and expansion of the regenerator T, and the action of expanding the upper wall 10 and the lower wall 20 to the outside. It is. Here, the first restricting portion 21 keeps the distance between the upper wall 10 and the lower wall 20 constant against the force of inflating the upper wall 10 and the lower wall 20 outward. 10 and the deformation | transformation of the lower wall 20 are controlled, and the expansion deformation of the cool storage agent container 1 is suppressed.

  Moreover, the state where the cool storage agent container 1 warps can be said to be a state where the interval between the upper wall 10 and the lower wall 20 of the cool storage agent container 1 is partially narrowed. Such warpage of the cool storage agent container 1 is caused by, for example, the action of a force that draws the upper wall 10 and the lower wall 20 inward by contraction of the synthetic resin when the cool storage agent container 1 is cooled after molding. In particular, when the metal plate M is embedded in the upper wall 10, a synthetic resin (synthetic resin located around the metal plate M) that is supported by the metal plate M to suppress shrinkage and a shrinkage located in other parts. A difference in the degree of shrinkage occurs between the resin and the synthetic resin that is not suppressed. The difference in the degree of shrinkage is a major factor that causes warping and distortion of the cool storage agent container 1. Here, the first restricting portion 21 keeps the distance between the upper wall 10 and the lower wall 20 constant against the force that pulls the upper wall 10 and the lower wall 20 inward, so that the upper wall 10 and the lower wall 20 are kept constant. The deformation of the wall 20 is restricted, and the warp of the cool storage agent container 1 is suppressed.

  As shown in FIGS. 1B and 2, the central portion of the lower wall 20 is provided with a ridge-shaped second restricting portion 22 that bulges toward the upper wall 10 and extends in the longitudinal direction. It has been. The second restricting portion 22 suppresses bending and twisting of the lower wall 20.

  As shown in FIG. 1, the peripheral wall 30 of the cool storage agent container 1 is provided with an inlet 31 for injecting the cool storage agent T into the accommodation space S. The injection port 31 is sealed after the cold storage agent T is injected into the accommodation space S. In addition, the cool storage agent container 1 is integrally formed with the metal plate M in a state where the metal plate M is embedded in the upper wall 10 by insert blow molding.

  As the synthetic resin forming the cool storage agent container 1 of the present embodiment, known materials generally used for cooling trays such as polyethylene and polypropylene can be used, and in particular, (A) high-density polyethylene resin as a base material. It is preferable to use a resin material containing (B) an ethylene-α-olefin copolymer and (C) a spherical filler. When the said resin material is used as a synthetic resin which forms the cool storage agent container 1, the deformation | transformation of the cool storage agent container 1 based on shrinkage | contraction of the synthetic resin after shaping | molding can be suppressed. Moreover, the heat conductivity of the cool storage agent container 1 and the durability against repeated freezing and thawing are improved. In addition, the high density polyethylene resin here means the high density polyethylene according to the classification | category of JISK6922-1.

  The (A) high-density polyethylene resin contained in the resin material has a melt flow rate: MFR (temperature 190 ° C., load 21.18 N) specified in JIS K6922-1 of 0.01 to 10.0 g / 10 min. It is preferably 0.03 to 1.0 g / 10 min, more preferably 0.03 to 0.3 g / 10 min. When the MFR of the high-density polyethylene resin is less than 0.01 g / 10 min, for example, when blow molding is performed, the load on the extruder becomes too large, making it difficult to form the parison, The wall thickness becomes too thick. On the other hand, if the MFR of the high-density polyethylene resin exceeds 10.0 g / 10 min, the viscosity is too low to form the parison itself. The content of the high-density polyethylene resin in the resin material is preferably 25 to 60% by mass. When the content of the high-density polyethylene resin is less than 25% by mass, breakage such as cracks is likely to occur due to repeated freezing and thawing when the product is used. Moreover, since shrinkage | contraction after blow molding will become large when content of a high density polyethylene resin exceeds 60 mass%, it will become easy to produce the excessive deformation | transformation after a shaping | molding, and peeling of a metal plate.

  Examples of the (B) ethylene-α-olefin copolymer contained in the resin material include an ethylene-propylene copolymer, an ethylene-butene copolymer, an ethylene-pentene copolymer, an ethylene-hexene copolymer, An ethylene-heptene copolymer and an ethylene-octene copolymer are mentioned. Only 1 type in these ethylene-alpha-olefin copolymers may be contained, and 2 or more types may be contained. The content of the ethylene-α-olefin copolymer in the resin material is preferably 10 to 25% by mass. When the content of the ethylene-α-olefin copolymer is less than 10% by mass, breakage such as cracks is likely to occur due to repeated freezing and thawing during use of the product. Moreover, when content of an ethylene-alpha-olefin copolymer exceeds 25 mass%, the rigidity of a product will fall and the deformation | transformation of the cool storage agent container 1 at the time of freezing will become large.

  Examples of the spherical filler (C) contained in the resin material include metal hydroxide, metal oxide, metal carbonate, metal powder, and graphite. Examples of the metal hydroxide include aluminum hydroxide and magnesium hydroxide. Examples of the metal oxide include calcium oxide, magnesium oxide, aluminum oxide, and zinc oxide. Examples of the metal carbonate include calcium carbonate, magnesium carbonate, barium carbonate, and zinc carbonate. Examples of the metal powder include zinc, magnesium, and aluminum. Only 1 type of these spherical fillers may be contained, and 2 or more types may be contained.

  The content of the spherical filler in the resin material is preferably 30 to 50% by mass. When the content of the spherical filler is less than 30% by mass, shrinkage after blow molding increases, and therefore excessive deformation after molding and peeling of the metal plate are likely to occur. On the other hand, when the content of the spherical filler exceeds 50% by mass, breakage such as cracks is likely to occur due to repeated freezing and thawing when the product is used. Here, the “spherical shape” of the spherical filler in the present specification does not mean only a true spherical shape, but generally means a substantially spherical shape.

  In addition, the resin material includes components other than the above components, for example, a plasticizer, within a range that does not impair the effect of suppressing deformation of the regenerator container 1 based on the shrinkage of the synthetic resin during cooling after insert blow molding. Antioxidants, hydrolysis inhibitors, ultraviolet absorbers, heat stabilizers, and flame retardants can be appropriately blended depending on the purpose. These components are blended in a predetermined amount according to a conventional method for each application.

  Moreover, as a material of the metal plate M embedded in the cool storage agent container 1, a well-known thing generally used for a cooling tray, for example, aluminum, copper, iron, and stainless steel, can be used. Of these, aluminum or copper is preferably used from the viewpoint of thermal conductivity.

  The cold storage agent T is injected into the cold storage agent container 1 configured as described above in a liquid state. At this time, as shown in FIG. 2, the regenerator T is filled in a liquid state so that an expansion allowance S <b> 1 during freezing is formed in the accommodation space S. And the liquid level T1 of the cool storage agent T in a liquid state is set to be positioned higher than the lower surface support portion 11a (the lower surface) while forming the expansion allowance S1. As the cool storage agent T, a known one generally used for a cooling tray (for example, a cool storage agent described in JP-A-4-23883) can be used.

Next, operational effects in the present embodiment will be described below.
(1) In the cooling tray of this embodiment, a metal plate is embedded in the upper wall 10 of the regenerator container 1 with a part of the upper surface exposed to the outside. As a result, even when a force for deforming the cold storage agent container 1 is applied during the freezing and expansion of the cold storage agent T, the deformation of the upper wall 10 is suppressed and the adhesion between the upper wall 10 and the metal plate M is improved. It can be suitably secured.

  Moreover, when the said structure is employ | adopted, compared with the conventional structure which merely adhere | attaches the metal plate M on the cool storage agent container 1, garbage becomes difficult to enter between the metal plate M and the cool storage agent container 1. FIG. The advantage is obtained. Furthermore, in the conventional structure which arrange | positions the metal plate M on the cool storage agent container 1, in order to improve safety, it was necessary to perform the edge part process which rounds the edge part of the metal plate M, but in this embodiment, Since the end of the metal plate M is covered with the upper wall 10, it is not necessary to perform the end processing of the metal plate M as in the conventional case. Moreover, when the said cool storage agent container 1 is shape | molded by insert blow molding, the parting part with the metal plate M and the upper wall 10 can be formed beautifully.

(2) The upper wall 10 is provided with an upper surface support portion 11b that covers a peripheral portion of the upper surface. Thereby, peeling of the metal plate M from the cool storage agent container 1 can be prevented.
(3) The upper wall 10 is provided with a lower surface support portion 11a that covers the entire lower surface of the metal plate M. The lower wall 20 is provided with a first restricting portion 21 that bulges toward the upper wall 10 side and whose front end surface 21a is fused to the lower surface support portion 11a. The first restricting portion 21 functions as a pillar that supports the space between the lower surface support portion 11a and the lower wall 20 of the upper wall 10 and keeps the distance between the lower surface support portion 11a and the lower wall 20 constant. To do. Thereby, the space | interval between the upper wall 10 and the lower wall 20 is kept constant, and the cold storage agent container of the deformation | transformation (expansion deformation | transformation) which tries to widen the space | interval, and the deformation | transformation (warpage) which tries to narrow the space | interval. 1 deformation can be suppressed.

  (4) The 1st control part 21 is formed so that the front end surface 21a may be melt | fused in the site | part located under the upper surface support part 11b in the lower surface support part 11a. When the metal plate M is embedded in the upper wall 10 with a part of the upper surface exposed to the outside, the force to deform the upper wall 10 generated during the freezing and expansion of the regenerator T is a metal There is a tendency to concentrate on the peripheral portion of the lower surface support portion 11a, the side edge support portion 11c, and the upper surface support portion 11b, which are portions surrounding the peripheral portion of the plate M. In the said structure, the 1st control part 21 is formed in the site | part located under the upper surface support part 11b in the lower surface support part 11a, By integrating the same part and the 1st control part 21, the metal plate M of FIG. The strength of the part surrounding the peripheral part is increased. Thereby, the deformation | transformation of the cool storage agent container 1 at the time of the freezing expansion | swelling of the cool storage agent T can be suppressed more effectively.

  Further, the deformation of the portion surrounding the peripheral portion of the metal plate M on the upper wall 10 causes peeling of the metal plate M from the upper wall 10. Therefore, according to the said structure, peeling of the metal plate M from the upper wall 10 can be prevented more effectively by suppressing the deformation | transformation of the site | part surrounding the peripheral part of the metal plate M in the upper wall 10. FIG. .

  (5) The upper wall 10 is formed with a bulging portion 12 that bulges upward from the lower surface support portion 11a. Therefore, the regenerator T in a liquid state is placed in the regenerator container 1 so that the liquid surface is located at a position higher than the lower surface support part 11a while leaving a space portion that becomes the expansion allowance S1 in the bulge part 12. It is possible to encapsulate. When the cool storage agent T is sealed in this way, a non-contact portion (space portion) generated between the upper wall 10 and the cool storage agent is formed in the bulging portion 12 when the cool storage agent T is frozen. Thus, the lower surface support portion 11a located on the lower side of the metal plate M and the cold storage agent T can be brought into full contact with each other. Therefore, while obtaining the deformation suppressing effect of the cool storage agent container 1 by providing the expansion allowance S1 in the cool storage agent container 1, the thermal conductivity among the metal plate M, the lower surface support portion 11a, and the cool storage agent T is suitably secured. can do.

  (6) The regenerator container 1 contains a high-density polyethylene resin having a melt flow rate of 0.01 to 10.0 g / 10 min as defined in (A) JIS K6922-1 as a base material, and (B) ethylene. It is formed of a resin material containing a -α-olefin copolymer and (C) a spherical filler. Preferably, the resin material is (A) 25 to 60% by mass of high-density polyethylene resin, (B) 10 to 25% by mass of ethylene-α-olefin copolymer, and (C) 30 to 50 of spherical filler. Contains by mass%.

  As one of the factors that cause the deformation of the cool storage agent container 1, there is a shrinkage of the synthetic resin that occurs during cooling after the cool storage agent container 1 is taken out of the mold. In particular, when the metal plate M is embedded in the upper wall 10, a synthetic resin (synthetic resin located around the metal plate M) that is supported by the metal plate M to suppress shrinkage and a shrinkage located in other parts. A difference in the degree of shrinkage occurs between the resin and the synthetic resin that is not suppressed. And the difference of this shrinkage | contraction degree becomes a big factor which causes the curvature and distortion of the cool storage agent container 1. FIG. Such a phenomenon becomes particularly remarkable when the cold storage agent container 1 in which the metal plate M having a large area that occupies most of the upper wall 10 is embedded in the upper wall 10 is formed by blow molding.

  By using the resin material, it is possible to suppress the shrinkage of the synthetic resin itself that occurs during cooling after being taken out from the mold. Further, since the resin material is excellent in thermal conductivity, the synthetic resin is quickly cooled, and particularly, the cooling of the synthetic resin inside the mold is promoted. Therefore, when the cooling time in the mold is the same, the cool storage agent container 1 made of the resin material is molded in a more cooled state (lower temperature) than the same container made of the conventional resin material. It will be taken out of the mold. Therefore, the shrinkage | contraction by cooling after taking out from the shaping | molding die which causes the deformation | transformation of the cool storage agent container 1 can be decreased. By these actions, deformation of the regenerator container 1 based on the shrinkage of the synthetic resin during cooling can be suppressed.

  Moreover, since the said resin material is excellent in thermal conductivity, the thermal conductivity of the cool storage agent container 1 can be improved. Thereby, while the freezing time of the cool storage agent T required before using a cooling tray becomes short, the cooling capacity of a cooling tray is improved. Furthermore, the cold storage container 1 is repeatedly used for freezing and thawing, but by using the resin material, durability against repeated freezing and thawing is also improved.

  In addition, the said embodiment can also be changed and actualized as follows. Moreover, it is also possible to change the said embodiment like the structure of the combination of the following modification example mutually.

-The upper surface support part 11b is not restricted to the structure which covers the whole upper surface peripheral part of the metal plate M, You may form so that a part of upper surface peripheral part of the metal plate M may be covered partially.
-At least a part of the upper surface of the metal plate M only needs to be exposed to the outside, and the center of the upper surface of the metal plate M may be partially covered by the upper surface support portion 11b. For example, in the embodiment described above, the upper surface support portion 11b is formed in a frame shape that covers only the peripheral portion of the metal plate M, but a crosspiece may be provided in the frame shape portion. In this case, the exposed portion of the metal plate M formed in the frame-shaped portion can be divided into a plurality of regions by the crosspiece.

  -A through-hole may be provided in the peripheral part of the metal plate M, and the connection part which connects the upper surface support part 11b and the lower surface support part 11a in this through-hole may be formed. When comprised in this way, position shift of the metal plate M with respect to the upper surface support part 11b and the lower surface support part 11a, and peeling of the metal plate M can be suppressed effectively. Moreover, when the said structure is employ | adopted, it is also possible to form the upper surface support part 11b in the shape of several islands scattered on the upper surface peripheral part of the metal plate M. FIG.

  -The shape of the 1st control part 21 is not specifically limited, For example, you may form in a truncated pyramid shape, and may form in the protrusion shape extended in the longitudinal direction of the lower wall 20, or a transversal direction. . Moreover, the 1st control part 21 is not restricted to the hollow shape opened below like the said embodiment, You may form in a solid shape. Furthermore, the first restricting portion 21 may not be formed as an integral member with the lower wall 20, and may be formed to be fixed to the upper wall 10 and the lower wall 20 while being configured as a separate body.

-The number which provides the 1st control part 21 is not specifically limited, Five or less may be sufficient and seven or more may be sufficient. Furthermore, you may abbreviate | omit the 1st control part 21. FIG.
-The position which provides the 1st control part 21 is not specifically limited like the said embodiment, The 1st control part 21 is provided in site | parts other than the site | part located under the upper surface support part 11b in the lower surface support part 11a. It may be provided.

-The enclosure state of the cool storage agent T is not specifically limited, For example, in the liquid state, you may enclose so that a liquid level may be located in a position lower than the lower surface of the lower surface support part 11a.
-The shape of the bulging part 12 and the formation position in the upper wall 10 are not specifically limited. For example, the shape of the bulging portion 12 may be formed in a U shape, an L shape, or an I shape in plan view and may be adjacent to the flat portion 11. Further, the bulging portion 12 may be omitted.

  When a synthetic resin other than the above resin material is used as the synthetic resin for forming the cold storage agent container 1, after cooling the synthetic resin in the mold during molding of the cold storage agent container 1 (for example, 20 The cool storage agent container 1 may be taken out from the mold after cooling to about 0C. Thereby, also when using synthetic resins other than the said resin material, a deformation | transformation of the cool storage agent container 1 based on the shrinkage | contraction of the synthetic resin at the time of cooling can be suppressed.

The cooling tray of the present embodiment may be used as a cold insulating material, for example, stored in a cold insulating container (for example, a cooler box) used for transporting or storing an article requiring cold storage.
In the above embodiment, the metal plate M is formed in a flat plate shape, but the end edge may be bent to form a bent portion. In the case of such a metal plate M, it is possible to embed only the bent portion in the upper wall 10 and install it in the regenerator container 1. For example, if the cross-sectional shape of the bent portion is an arc shape (a folded portion is formed), it is suitable for maintaining the embedded state in the upper wall 10.

Next, a technical idea that can be grasped from the above embodiment and another example will be described.
(A) The regulation part is a cooling tray characterized in that a lower wall of the cold storage agent container is expanded toward the upper wall side, and a tip is fused to the lower surface support part.

  (B) In the liquid state, the cool storage agent is sealed so that the liquid surface is positioned higher than the lower surface support portion while leaving a space portion as an expansion allowance in the bulging portion. And cooling tray.

  (C) A hollow box-shaped synthetic resin cold storage container used by enclosing a cold storage agent, with a metal plate embedded in the upper wall with a part of the upper surface exposed to the outside A regenerator container characterized in that an upper surface support portion covering the peripheral edge portion of the upper surface of the metal plate is provided on the upper wall.

  (D) a cooling tray in which a metal plate is placed on a synthetic resin cold storage agent container having a hollow box shape and a cold storage agent is sealed in the cold storage agent container, the metal plate having an edge thereof A bent portion formed by bending is provided, the bent portion is embedded in the upper wall of the cold storage container, and a support portion is provided on the upper wall for holding and supporting the bent portion of the metal plate. And cooling tray.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
Using the resin material having the composition shown in Table 1, a cool storage agent container having a metal plate embedded in the interior shown in FIG. 1 was molded by insert blow molding. Specifically, a blow molding die in which a metal plate is previously placed inside is closed so as to sandwich a cylindrical parison made of a molten resin obtained by melting the resin material, and the parison sandwiched between blow molding dies is enclosed. By blowing air, a hollow box-shaped regenerator container with a metal plate embedded therein was formed. The outer diameter of the cool storage agent container is about 300 mm in length, 200 mm in width, 25 mm in thickness, and about 2 mm in wall thickness. The metal plate used was an aluminum metal plate having a thickness of 2 mm.

  And after cooling the cool storage agent container in the mold for 60 seconds, the cool storage agent container is taken out from the mold, and the cool storage agent container of each example and comparative example is further cooled naturally at room temperature. Obtained. Here, when the temperature of each regenerator container immediately after taking out from the mold was measured, the temperature of the regenerator container of Comparative Example 1 was 80 ° C., whereas Examples 1 to 3 and Comparative Example 2 were used. The temperature of the cold storage agent container was lowered to about 30 ° C. Moreover, the temperature of the cool storage agent container of Comparative Example 3 was about 40 ° C. After cooling, the cooling trays of the respective examples and comparative examples were obtained by enclosing the cold storage agent in the cold storage agent containers of the examples and comparative examples. About the cooling trays of the obtained Examples and Comparative Examples, “deformability after molding”, “freezing property of cold storage agent”, “food cooling property”, “durability”, “deformation after freezing” according to the following methods Evaluation of “sex” was performed. In addition, a resin plate was separately molded using a resin material having the composition shown in Table 1, and “thermal conductivity”, “flexural modulus”, and “Charpy impact value” were measured for the resin plate.

[Evaluation of deformability after molding]
The molded cold storage agent container was taken out of the mold, and the degree of deformation of the cold storage agent container at the time when it was allowed to stand at room temperature for 24 hours was visually observed. Then, the deformability after molding was evaluated according to the following criteria.

A: Almost no deformation is observed.
○: Although some deformation is seen, it can be used without any problem.
X: It deform | transforms greatly and cannot be used as a cool storage agent container.

[Evaluation of freezing properties of cool storage agents]
The cooling tray of each example was placed in a freezer at −25 ° C., and the time until the encapsulated liquid state regenerator was frozen was measured.

[Evaluation of food cooling]
The cooling tray in a state where the regenerator was frozen was installed in the freezer compartment (−25 ° C.) of the freezer. And the foodstuff (a 130 mm long, 60 mm wide, 25 mm thick piece) was placed on the cooling tray, and the time until the food was frozen was measured.

[Evaluation of durability]
After repeating freezing and thawing (natural thawing at room temperature) of the cooling tray (cool storage agent) five times, visually check whether the cool storage agent container is damaged (such as peeling of the fused portion of the first regulating portion). And observed. And durability was evaluated according to the following criteria.

○: Damage could not be confirmed.
X: Damage was confirmed.
[Evaluation of deformability after freezing]
The deformation of the cold storage agent container after freezing of the cooling tray (cool storage agent) was visually observed. And the deformability after freezing was evaluated according to the following criteria.

○: Almost no deformation.
X: Remarkable deformation was confirmed.
[Thermal conductivity]
Using a resin material having the composition shown in Table 1, a resin plate having a length of 100 mm, a width of 100 mm, and a thickness of 2 mm was prepared. And about the heat conductivity of the resin board, it measured on the measurement conditions of thin film mode using the measuring device (QTM500, Kyoto Electronics Industry Co., Ltd. product) which measures heat conductivity using a heat ray method.

[Bending elastic modulus]
About the test piece created using the resin material of the composition shown in Table 1, the bending elastic modulus was measured based on JISK6922-2.

[Charpy impact value]
About the test piece created using the resin material of the composition shown in Table 1, Charpy impact value (with notch) was measured based on JISK7111-1.

  In Table 1, the notations (A) to (C) in the “component” column indicate substances corresponding to the respective components described in the claims of the present application, and the notations (a) and (c) The substance used as an alternative component of a component and C component is shown. Moreover, the numerical value in the column which shows each component in Table 1 shows content of the component of the said column, The unit is the mass%.

Each component of the resin material shown in Table 1 is as follows.
High-density polyethylene resin: Nisoron Hard 8600A (manufactured by Tosoh Corporation) (MFR defined by JISK6922-1 is 0.03)
Low density polyethylene resin: manufactured by Tosoh Corporation, Petrocene 173 (MFR defined by JISK6922-1 is 0.3)
Ethylene-propylene rubber: manufactured by Mitsui Chemicals, Toughmer A-0550S
Ethylene-octene rubber: Dow, Engage 8200
Calcium carbonate (spherical): Ryton S-4, manufactured by Tamnan Chemical Co., Ltd.
Magnesium oxide (spherical): manufactured by Kyowa Chemical Industry Co., Ltd., Pyroxuma 5301K
Talc (plate-shaped): Nihon Talc Co., Ltd., Microace K-1

表１に示すように、蓄冷剤容器を形成する合成樹脂として、母材として高密度ポリエチレン樹脂を含有し、さらにエチレン−α−オレフィン共重合体及び球状フィラーを含有する樹脂材料を用いた各実施例では、成形後の変形性、蓄冷剤の凍結性、食品冷却性、耐久性、及び凍結後の変形性の各評価が優れていた。一方、蓄冷剤容器を形成する合成樹脂として、高密度ポリエチレン樹脂のみを用いた比較例１では、成形後における蓄冷剤容器の変形が著しく、蓄冷剤容器として使用することができなかった。そのため、比較例１については、蓄冷剤の凍結性、食品冷却性、耐久性、及び凍結後の変形性の評価を行うことができなかった。

As shown in Table 1, each implementation using a resin material containing a high-density polyethylene resin as a base material and further containing an ethylene-α-olefin copolymer and a spherical filler as a synthetic resin forming a cool storage agent container In the example, each evaluation of the deformability after shaping | molding, the freezing property of a cool storage agent, food cooling property, durability, and the deformability after freezing was excellent. On the other hand, in Comparative Example 1 in which only the high-density polyethylene resin was used as the synthetic resin forming the cool storage agent container, the cool storage agent container was significantly deformed after molding, and could not be used as the cool storage agent container. Therefore, in Comparative Example 1, it was not possible to evaluate the freezing property, food cooling property, durability, and deformability after freezing of the regenerator.

  Moreover, in the comparative example 2 using the resin material which added the plate-shaped talc instead of the spherical filler, the fusion | bonding part of the 1st control part 21 and the upper wall 10 peeled by the volume expansion of the cool storage agent at the time of freezing. As a result, the durability evaluation was lower than in each example. Further, in Comparative Example 3 using a resin material containing a low density polyethylene resin as a base material and further containing only a spherical filler, the cold storage agent container is greatly swollen due to the volume expansion of the cold storage agent during freezing, and is poorly seated. Since it became a cooling tray (poor stability when mounted on a flat surface), the evaluation of deformability after freezing was lower than in each example.

M ... Metal plate, S ... Accommodating space, S1 ... Expansion allowance, T ... Cold storage agent, T1 ... Liquid surface of cold storage agent, 1 ... Cold storage agent container, 10 ... Upper wall, 11 ... Flat part, 11a ... Lower surface support part, 11b ... Upper surface support portion, 11c ... Side edge support portion, 12 ... Swelling portion, 20 ... Lower wall, 21 ... First restriction portion, 21a ... Upper surface of the first restriction portion, 22 ... Second restriction portion, 30 ... Peripheral wall 31 ... Inlet.

Claims (6)

A cooling tray in which a cold storage agent is enclosed in a cold storage container made of synthetic resin in a hollow box shape,
A metal plate is embedded in the upper wall of the cold storage agent container with a part of the upper surface exposed to the outside, and an upper surface support portion that covers the peripheral edge of the upper surface of the metal plate is provided on the upper wall. And cooling tray. In the cool storage agent container, a lower surface support portion that covers a lower surface of the metal plate is provided on the upper wall, and a distal end is fixed to the lower surface support portion and a base end is interposed between the lower surface support portion and the lower wall. The cooling tray according to claim 1, further comprising a restriction portion fixed to the lower wall. The cooling tray according to claim 2, wherein a tip of the restricting portion is fixed to a portion of the lower surface support portion that is located below the upper surface support portion. The lower wall supporting part which covers the lower surface of the metal plate on the upper wall, and a bulging part which bulges above the lower surface supporting part and outside the lower surface supporting part. The cooling tray according to any one of claims 1 to 3. The cold storage agent container contains, as a base material, (A) a high density polyethylene resin having a melt flow rate defined by JISK6922-1 of 0.01 to 10.0 g / 10 min, and (B) ethylene-α-. The cooling tray according to any one of claims 1 to 4, wherein the cooling tray is formed of a resin material containing an olefin copolymer and (C) a spherical filler. The resin material is 25-60 mass% of the (A) high-density polyethylene resin, 10-25 mass% of the (B) ethylene-α-olefin copolymer, and 30-50 mass of the (C) spherical filler. The cooling tray according to claim 5, wherein the cooling tray is contained.

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