JP4132500B2 - Structures using rotational molded parts - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure using the rotary molded parts.
[0002]
[Prior art]
Refrigerator for storing vegetables, fruits and other fresh food (stored items) such as meat and fish in the cabinet and storing them for a long time, ice making machine for storing ice blocks (stored items) produced in the ice making unit in the machine, etc. Then, the heat insulation which accommodates or stores a to-be-stored object, or the sleeve for connecting an ice-making part and a heat insulation has a heat insulation structure.
[0003]
For example, as shown in FIG. 12, a sleeve used for an ice making machine has an exterior 12 formed in a U-shape with a sheet metal material on the outer side of the four surfaces of the interior 10 formed in a rectangular tube shape with a resin material. In a state of holding and assembling, a heat insulating material 14 made of urethane foam or the like is injected between the interior 10 and the exterior 12 and foamed to produce a heat insulating structure filled with the heat insulating material 14. Is done.
[0004]
[Problems to be solved by the invention]
In the sleeve, when the heat insulating material 14 is injected between the interior 10 and the exterior 12 and foamed, the heat insulating material 14 is prevented from leaking from its mating surface as shown in FIG. The tape 16 is affixed. For this reason, the number of parts increases and the fault that an assembly man-hour increases is pointed out. Moreover, even if the tape 16 is applied, the heat insulating material 14 leaks from the mating surface to the outside due to the foaming pressure of the heat insulating material 14, and there is a problem that the quality is impaired. Further, when the heat insulating material 14 is injected between the interior 10 and the exterior 12 and foamed, the interior 10 or the exterior 12 may be deformed by the foaming pressure. It was necessary to fix the positioning, and workability was inferior.
[0005]
OBJECT OF THE INVENTION
The present invention has been proposed in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed to suitably solve this problem. For example, a member having a heat insulating structure can be manufactured easily and in a short time. An object of the present invention is to provide a structure using the rotational molded part.
[0006]
[Means for Solving the Problems]
In order to overcome the above-described problems and achieve the desired purpose suitably, the structure using the rotationally molded part according to the present invention is:
A structure using rotationally molded parts,
A rectangular tube-shaped rotationally molded part with ribs protruding from the upper surface ;
The first bent portion and the second bent portion are bent in the same direction at the upper and lower ends of the main body facing each outer surface of the rotationally molded part, and the engagement holes formed in the first bent portion are formed. And four exterior members that are fitted and engaged with the ribs and fixed by the fixing means in a state where the second bent portion is in contact with the lower surface of the rotary molded part,
The first bent portion and the second bent portion of the exterior member are set so as to be separated from each other at a maximum allowable value allowed for a height dimension from the lower surface to the upper surface of the rotationally molded part. .
[0007]
To overcome the problems described above, in order to suitably achieve the expected object, structure using the rotary molded part according to another aspect of the present Application is
A structure using a rotationally-molded part disposed between the lower ice storage and the upper ice making unit,
A rectangular tube-shaped rotationally molded part in which a rib protrudes from the upper surface facing the ice making part;
The first bent portion and the second bent portion are bent in the same direction at the upper and lower ends of the main body facing each outer surface of the rotationally molded part, and the engagement holes formed in the first bent portion are formed. Four exterior members that are fitted and engaged with the ribs and fixed by the fixing means in a state in which the second bent portion is in contact with the lower surface of the rotary molded part;
The exterior member is set to a thickness larger than the protruding dimension of the rib from the upper surface of the rotationally molded part, and a fitting portion into which the rib can be fitted is formed, and the rib is fitted into the fitting portion. A gap member adhered to the upper surface of the first bent portion,
The ice making unit is placed on the gap member .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Then, per structure using the rotational molding part according to the present invention, by way of preferred embodiments will be described below with reference to the accompanying drawings. In the embodiment, as an example of the structure, a sleeve used in an ice making machine will be described as an example. However, the structure of the present invention is not limited to this, and a heat insulating cabinet and other members in general. Can be used.
[0009]
As shown in FIG. 1, a sleeve 20 as a preferred embodiment of a structure using a rotationally molded part includes a resin heat insulating member (rotary molded part) 24 formed in a rectangular tube shape including a foam heat insulating material 22. The four exterior members 26, 26, 27, and 27 assembled outside the heat insulating member 24 are basically configured. The heat insulating member 24 is a rotary molded part manufactured by inserting a foamable material (foam heat insulating material 22) together with powdered plastic into a mold and heating the mold while rotating. As shown in FIG. 5, the powder plastic forms the skin 28, and the foamed heat insulating material 22 layer in which the foamable material is expanded is formed. Further, as shown in FIG. 3, a plurality of ribs 30 rising at a required height are integrally formed on the upper surface (one outer surface) of the heat insulating member 24 at a predetermined interval. Incidentally, in the embodiment, as shown in FIGS. 1 and 2, five ribs 30 are formed on the long side and three on the short side on the upper surface of the heat insulating member 24, respectively.
[0010]
Each first exterior member 26 disposed corresponding to the short side of the heat insulating member 24 is formed by bending a sheet metal material having a required thickness into a U-shaped cross section, as shown in FIG. The length dimension is set to be approximately the same as the short side of the heat insulating member 24. The first bent portion 26 a on the upper side of the first exterior member 26 is provided with engagement holes 32 at positions corresponding to the three ribs 30 formed on the short side of the heat insulating member 24. . Then, in a state where the ribs 30 are fitted and engaged in the respective engagement holes 32, the second bent portion 26b on the lower side of the first exterior member 26 is brought into contact with the lower surface (the other end) of the heat insulating member 24, and both 26b 24 are fixed by a plurality of screws 34 as fixing means (see FIG. 5).
[0011]
Each of the second exterior members 27 disposed corresponding to the long side of the heat insulating member 24 is formed by bending a sheet metal material having a required thickness into a U-shaped cross section as shown in FIG. The length dimension is set to be approximately the same as the long side of the heat insulating member 24. Further, the first bent portion 27 a on the upper side of the second exterior member 27 is provided with engagement holes 32 at positions corresponding to the five ribs 30 formed on the long side of the heat insulating member 24. . Then, in a state where the ribs 30 are fitted and engaged in the respective engagement holes 32, the second bent portion 27b on the lower side of the second exterior member 27 is brought into contact with the lower surface (the other end) of the heat insulating member 24, and both 27b , 24 are fixed by a plurality of screws 34 as fixing means. It should be noted that the first folding member 27a and the second folding portion 27b of the second exterior member 27 corresponding to the long side of the heat insulating member 24 are provided with the first exterior member 26 on the short side at both ends in the longitudinal direction. Cutouts 38 are formed so as not to overlap the first bent portion 26a and the second bent portion 26b, respectively.
[0012]
In addition, a heat insulating plate 36 having a required thickness as a cushioning material is attached to the inner surfaces of the main bodies 26 c and 27 c facing the outer surface of the heat insulating member 24 in the exterior members 26 and 27. A gap between the exterior members 26 and 27 due to variation in dimensions is prevented by deformation of the heat insulating plate 36 (see FIG. 5). As the heat insulating plate 36, for example, a polyethylene foam having a high expansion ratio is preferably used.
[0013]
[Effect of the embodiment]
Next, the actual method of assembling the sleeve according to the above-described configuration will be described. The corresponding short-side or long-side ribs 30 are fitted into and engaged with the engaging holes 32 of the first bent portions 26a and 27a with respect to the heat insulating member 24 having the ribs 30 formed on the upper surface. Thus, the exterior members 26 and 27 are respectively attached. Next, with the second bent portions 26 b and 27 b of the exterior members 26 and 27 in contact with the lower surface of the heat insulating member 24, the second bent portions 26 b and 27 b are attached to the lower surface of the heat insulating member 24 with screws 34. (See FIG. 5). Thereby, the sleeve 20 having a heat insulating structure in which the outer side (outer side surface, upper surface, and lower surface) of the heat insulating member 24 is covered with the exterior members 26 and 27 is assembled.
[0014]
Here, as described above, the heat insulating member 24, which is a rotationally molded part manufactured by inserting a foamable material together with powdered plastic into a mold and heating the mold while rotating, has a low dimensional accuracy. There are variations in dimensions depending on the product. On the other hand, the exterior members 26 and 27 formed of sheet metal can be accurately molded to the required dimensions. Therefore, for example, the first bent portions 26a and 27a and the second bent portions 26b and 27b of the exterior members 26 and 27 are separated and formed in accordance with the maximum allowable height dimension of the heat insulating member 24. By doing so, it is possible to deal with variations in dimensions of the heat insulating member 24.
[0015]
That is, if the height dimension of the heat insulating member 24 is the minimum allowable value, the upper surface of the heat insulating member 24 whose lower surface is in contact with the second bent portions 26b and 27b of the exterior members 26 and 27 is as shown in FIG. The first bent portions 26a and 27a are spaced apart downward. However, even in this case, since the rib 30 is fitted and engaged with the engaging hole 32, the heat insulating member 24 and the exterior members 26 and 27 are reliably positioned under the engaging action of both the members 30 and 32. Assembled in the assembled state. If the height dimension of the heat insulating member 24 is the maximum allowable value, as shown in FIG. 6, the upper surface of the heat insulating member 24 with the lower surface in contact with the second bent portions 26b, 27b of the exterior members 26, 27 is The ribs 30 are fitted and engaged with the engagement holes 32 while being in contact with the first bent portions 26a and 27a, and the heat insulating member 24 and the exterior members 26 and 27 are reliably assembled in a positioned state. Further, the variation in the dimension of the heat insulating member 24 in the thickness direction is absorbed by the heat insulating plate 36 being deformed, and the sleeve 20 having a small gap between the heat insulating member 24 and the exterior members 26 and 27 is obtained. As shown in FIG. 5, when a gap is formed between the upper surface of the heat insulating member 24 and the first bent portions 26a and 27a of the exterior members 26 and 27, the first bent is used to fill the gap. A cushion material may be disposed on the lower surfaces of the portions 26a and 27a.
[0016]
As described above, since the sleeve 20 is configured by assembling the exterior members 26 and 27 outside the heat insulating member 24 made of a rotationally molded part, the heat insulating material is not injected and foamed when the sleeve 20 is assembled. It is not necessary to affix a tape for stopping or use a foaming jig, and the number of parts can be reduced, the work efficiency can be improved, and it can be manufactured at low cost. Moreover, in the configuration of the embodiment, even if the heat insulating member 24 has a variation in dimensions, the heat insulating member 24 can be reliably fixed to the exterior members 26 and 27. Furthermore, in the heat insulating member 24 made of a rotationally molded part, there is no small gap in the skin 28, so that water or the like does not enter inside, and the foam heat insulating material 22 deteriorates and the heat insulating effect is reduced. Absent.
[0017]
Here, as shown in FIG. 7, the sleeve 20 according to the above-described embodiment is disposed between the ice storage 40 and the ice making unit 46 including the ice making mechanism 42 and the freezing mechanism 44, and reduces the ice storage amount of ice blocks. Used to increase. In this case, when the ribs 30 protrude upward from the respective engagement holes 32 of the first bent portions 26a and 27a on the upper surface of the sleeve 20 as the installation surface of the ice making portion 46, as shown in FIG. The installation surface is uneven, and a gap is created between the sleeve 20 and the ice making unit 46. In addition, by interposing a plate material made of a flexible foam between the sleeve 20 and the ice making part 46, the gap can be closed to some extent, but it is insufficient.
[0018]
If a gap is formed between the sleeve 20 and the ice making unit 46, the following problems are caused.
{Circle around (1)} When the internal cold air of the ice storage 40 leaks from the gap and the surrounding environment is high, the internal temperature of the ice storage 40 rises, the ice blocks easily melt, and the ice making capability of the ice making mechanism 42 also decreases.
(2) When the storage location of the ice storage 40 is hot and humid, such as in a kitchen, condensation on the exterior members 26 and 27 around the gap drops on the floor and wets the floor, which is likely to be unsanitary. Also, the floor becomes slippery.
(3) Miscellaneous bacteria, dust, insects and the like enter the ice storage 40 through the gap, and are easily unsanitary.
(4) When the ice making portion 46 is placed on the sleeve 20 via the plate material, the load of the ice making portion 46 is applied only to the portion corresponding to the rib 30 of the plate material, so that the plate material is easily broken and the ice making portion 46 When the work is placed on the sleeve 20 at a fixed position, the operator must work the ice making part 46 without dragging the upper surface of the sleeve 20, and the workability is inferior. Further, if there is a protrusion such as a screw head on the bottom surface of the ice making portion 46, the plate material may be caught and broken.
(6) When a torn plate material is reapplied, the plate material is easily broken because it is made of foam, and an adhesive (such as a double-sided tape) for bonding the plate material to the sleeve 20 remains on the upper surface of the sleeve 20. Therefore, the troublesome work of removing this is required.
[0019]
Therefore, in the sleeve 48 according to still another embodiment shown in FIGS. 8 to 11, four insulation boards 50, 50, as gap members are provided on the upper surfaces of the exterior members 26, 27 assembled to the heat insulating member 24. By sticking 52,52, it is comprised so that the various problems mentioned above may be solved. In addition, since the other structure of the sleeve 48 which concerns on another Example is the same as the sleeve 20 which concerns on the Example mentioned above, only a different part is demonstrated.
[0020]
That is, each first insulation board 50 attached corresponding to the short side of the heat insulating member 24 is formed in a rectangular shape having a required thickness using, for example, polyethylene foam as a material, as shown in FIG. Thus, it is set to a dimension that can substantially cover the short side of the heat insulating member 24. The first insulation board 50 is provided with fitting holes 54 penetrating vertically as fitting portions at positions corresponding to the three ribs 30 formed on the short side of the heat insulating member 24. ing. And in the state which inserted each rib 30 which protrudes from the 1st bending part 26a of the 1st exterior member 26 in the corresponding fitting hole 54, the lower surface of this board 50 is made into the upper surface of the 1st bending part 26a. It is configured to be attached via a double-sided tape or the like. The thickness of the first insulation board 50 is set to be larger than the protruding dimension of the rib 30 from the upper surface of the heat insulating member 24, and protrudes to the maximum from the first bent portion 26a, as shown in FIG. Even when the rib 30 is inserted into the fitting hole 54, the rib 30 does not protrude from the upper surface of the board 50.
[0021]
Further, as shown in FIG. 10, a thin protective tape 56 is attached to the entire top surface of the first insulation board 50. As the protective tape 56, for example, a PET (polyethylene terephthalate) film, which is thin but has sufficient strength, is not easily torn and slips, is preferably used. The protective tape 56 can be deformed according to slight unevenness.
[0022]
Each second insulation board 52 attached corresponding to the long side of the heat insulating member 24 is basically the same configuration as the first insulation board 50 attached to the short side, The only difference is that the fitting hole 54 as a fitting portion is formed at a position corresponding to each of the five ribs 30 formed on the long side of the heat insulating member 24.
[0023]
The insulation boards 50 and 52 are produced, for example, by punching out a sheet-like polyethylene foam with a mold, cutting with a blade, or by extrusion. The polyethylene foam contains a large number of closed cells and thus hardly contains water, and is a material that complies with the Food Sanitation Law and is suitable as a material for the insulation boards 50 and 52.
[0024]
As described above, by sticking the insulation boards 50 and 52 to the upper surfaces of the exterior members 26 and 27, the following operational effects can be obtained.
(1) Since the ribs 30 projecting from the first bent portions 26a, 27a of the exterior members 26, 27 are fitted into the respective fitting holes 54 of the insulation boards 50, 52, the sleeve 48 as shown in FIG. There is no unevenness on the upper surface (the upper surfaces of the insulation boards 50, 52), and no gap is generated even when the ice making part 46 is placed on the sleeve 48. Accordingly, it is possible to prevent the cold air from leaking from the ice storage 40, prevent melting of ice blocks and the ability of the ice making mechanism 42 from being reduced, and suppress the condensation of the exterior members 26 and 27 to wet the installation floor and make it unsanitary. Can be prevented. Further, dust and insects do not enter the ice storage 40 and can always be kept hygienic.
(2) Since the fitting holes 54 of the insulation boards 50 and 52 are closed with the protective tape 56, even if the fitting holes 54 are not hidden even when the ice making part 46 is placed on the sleeve 48. In the hole 54, condensed water, dust, etc. do not accumulate. Further, it is possible to prevent dew condensation water, dust and the like from entering the back sides of the exterior members 26 and 27 communicating with each other through the fitting hole 54.
(3) Since there is no unevenness on the upper surface of the sleeve 48, the load of the ice making part 46 is not partially applied to a specific part of the insulation boards 50 and 52, and the protective tape 56 has a required strength. Therefore, when the ice making part 46 is placed on the sleeve 48, the ice making part 46 is not easily torn even if the ice making part 46 is slid on the insulation boards 50 and 52, thereby improving workability. That is, since the ice making part 46 is slightly placed on a part of the sleeve 48 and can be slid and moved to an appropriate position, the installation work becomes easy. In particular, it is advantageous when the ice making part 46 cannot be supported by a large number of people in the installation work of the ice making part 46 in a narrow space. Since the protective tape 56 is not easily torn, there are few opportunities for the insulation boards 50 and 52 to be broken and need to be reattached, and the troublesome work of removing the adhesive (double-sided tape or the like) remaining on the sleeve 48 can be avoided.
(4) Since the insulation boards 50 and 52 can be attached to the exterior members 26 and 27 with reference to the fitting holes 54 inserted into the ribs 30, positioning of the attachment positions of the boards 50 and 52 is Easy.
(5) The protective tape 56 is thin, and even if there is a protrusion such as a screw head on the bottom surface of the ice making part 46, it is deformed according to the protrusion and a gap is generated between the ice making part 46 and the ice making part 46. Absent. Further, even if the upper surfaces of the insulation boards 50 and 52 are not smooth due to air bubbles, the smooth protective tape 56 is stuck on the upper surfaces, so that dirt does not accumulate easily and can be used hygienically.
{Circle around (6)} Since the fitting holes 54 are simply removed from the sheet-like insulation boards 50 and 52 and the protective tape 56 is attached to the upper surface, the sheet can be manufactured at low cost.
[0025]
In the present embodiment, the structure has a heat insulating structure, but the structure may not have a heat insulating structure. The fixing means for fixing the heat insulating member and the exterior member is not limited to screws, and other members such as rivets and bolt-nuts can be used. Further, in the gap member attached to the upper surface of the exterior member, the fitting portion into which the rib is inserted may be a concave portion opened only on the lower surface side instead of the hole penetrating vertically. Furthermore, the gap member is not limited to one that is divided so as to correspond to the short side and the long side of the rotationally molded part (heat insulating member), but is a rectangular frame-shaped integral corresponding to the top surface shape of the rotationally molded part. Also good.
[0026]
【The invention's effect】
As described above , according to the structure using the rotationally molded part according to the present invention, the rotationally molded part and the exterior member having variations in dimensions can be reliably assembled. Further, by using a heat insulating member that is a rotationally molded part, there is an advantage that a heat insulating box or a sleeve of a refrigerator or ice making machine that requires heat insulation can be manufactured easily and in a short time with a small number of parts. Further, the first bent portion and the second bent portion of the exterior member disposed on the outer side of the rotary molded part are separated from each other by the maximum allowable value allowed for the height dimension from the lower surface to the upper surface of the rotary molded part. By setting so that the exterior member can be reliably positioned and assembled in a state where the engagement holes are fitted and engaged with the ribs with respect to the rotationally molded parts having variations in dimensions, the rotationally molded parts can be assembled. The dimensional accuracy of the structure used can be improved.
[0027]
By attaching a gap member formed with a fitting portion into which a rib formed on the upper surface of the rotationally molded part can be inserted to the upper surface of an exterior member assembled to the rotationally molded part, the upper surface of the part The ribs were not made uneven. Thereby, when placing the ice making part on the upper surface of the rotationally molded part, no gap is generated between them, and various problems caused by the gap can be prevented in advance. In addition, since the protective tape is attached to the upper surface of the gap member, the installation work of the ice making unit and the like becomes easy and workability is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a sleeve according to a preferred embodiment of the present invention.
FIG. 2 is a plan view of a sleeve according to an embodiment.
FIG. 3 is a side view of a sleeve according to an embodiment.
FIG. 4 is a longitudinal side view of a heat insulating member in a sleeve according to an embodiment.
FIG. 5 is a longitudinal sectional side view of a main part of a sleeve according to an embodiment.
FIG. 6 is a longitudinal sectional side view of a main part of a sleeve according to another embodiment.
FIG. 7 is a partially cutaway front view showing an ice making machine using a sleeve according to an embodiment.
FIG. 8 is an exploded perspective view of a sleeve according to still another embodiment.
FIG. 9 is a longitudinal sectional side view of a main part of a sleeve according to still another embodiment.
FIG. 10 is a cross-sectional view showing an insulation board used for a sleeve according to still another embodiment.
FIG. 11 is a partially cutaway front view showing an ice making machine using a sleeve according to still another embodiment.
FIG. 12 is an exploded perspective view of a conventional sleeve.
FIG. 13 is a longitudinal sectional side view of a main part of a sleeve according to a conventional technique.
[Explanation of symbols]
22 heat insulating material, 24 heat insulating member (rotary molded part), 26 first exterior member 26a first bent portion, 26b second bent portion, 26c Main body 27 second exterior member, 27a first bent portion, 27b second bent portion
27c Main body , 30 ribs, 32 engagement holes, 34 screws (fixing means)
40 Ice storage, 46 Ice making part , 50 1st insulation board (gap member)
52 Second insulation board (gap member), 54 Fitting hole (fitting part)
56 protective tape

Claims (5)

A structure using a rotationally molded part (24),
A rectangular tube-shaped rotationally molded part (24) in which a rib (30) protrudes from the upper surface ,
The first bent portion (26a, 27a) and the second bent portion (26b, 27b) are folded in the same direction at the upper and lower ends of the main body (26c, 27c) facing each outer surface of the rotationally molded part (24). The engagement hole (32) formed in the bent portion and formed in the first bent portion (26a, 27a ) is fitted and engaged with the rib (30) , and the second bent portion (26b, 27b) is rotated. Four exterior members (26, 27) fixed by the fixing means (34) in a state of being in contact with the lower surface of the molded part (24) ,
The first bent portion (26a, 27a) and the second bent portion of the exterior member (26, 27) at the maximum allowable value allowed for the height dimension from the lower surface to the upper surface of the rotationally molded part (24). (26b, 27b) is a structure using a rotationally molded part, wherein the structure is set so as to be separated from each other . A structure using a rotationally molded part (24) disposed between the lower ice storage (40) and the upper ice making part (46) ,
A rectangular tube-shaped rotationally molded part (24) having a rib (30) projectingly formed on an upper surface thereof facing the ice making part (46) side ,
The first bent portion (26a, 27a) and the second bent portion (26b, 27b) are folded in the same direction at the upper and lower ends of the main body (26c, 27c) facing each outer surface of the rotationally molded part (24). The engagement hole (32) formed in the bent portion and formed in the first bent portion (26a, 27a ) is fitted and engaged with the rib (30) , and the second bent portion (26b, 27b) is rotated. Four exterior members (26, 27) fixed by fixing means (34) in contact with the lower surface of the molded part (24) ;
The thickness is set larger than the protruding dimension of the rib (30) from the upper surface of the rotationally molded part (24) , and a fitting portion (54) into which the rib (30) can be inserted is formed, and the fitting wherein a first bent portion of the exterior member (26, 27) (26a, 27a) gap member (50, 52) which is stuck on the upper surface in a state in which fitted the parts (54) ribs (30) ,
The ice making part (46) is placed on the gap member (50, 52).
A structure using a rotationally molded part characterized by the above . The first bent portion (26a, 27a) and the second bent portion of the exterior member (26, 27) at the maximum allowable value allowed for the height dimension from the lower surface to the upper surface of the rotationally molded part (24). 3. A structure using a rotationally molded part according to claim 2, wherein the structure is set so as to be separated from (26b, 27b) . The structure using a rotationally molded part according to claim 2 or 3, wherein a protective tape (56) that is not easily torn and slips is adhered to the upper surface of the gap member (50, 52). The structure using the rotationally molded part according to any one of claims 1 to 4, wherein the rotationally molded part is a resin heat insulating member (24) including a foam heat insulating material (22).

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