JP2000227274A - Structure using rotary-molded component and assembling method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a member having a heat insulating structure, simply and in a short time. SOLUTION: A sleeve 20 is constituted of a heat insulating member 24 and four exterior members 26 and 27 fitted to the outside of the heat insulating member 24. The member 24 is a rotationally molded component and a plurality of ribs 30 are formed integrally on the topside thereof. The exterior members 26 and 27 are formed respectively by bending a sheet metal of a required thickness in the shape of a letter U in section, and engagement holes 32 are made in first bent parts 26a and 27a on the lower side of the members, at positions corresponding respectively to the ribs 30 formed on the heat insulating member 24. In a state wherein the ribs 30 are fitted in and engaged with the engagement holes 32 respectively, second bent parts 26b and 27b on the lower side of the exterior members 26 and 27 are brought into contact with the bottom side of the heat insulating member 24 and fixed thereto by a plurality of screws.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure using a rotationally molded part and a method for assembling the same.

[0002]

[Prior Art] Fresh food such as vegetables and fruits, meat and fish
Refrigerators that store (storage items) in a refrigerator for long-term storage, and ice machines that store ice blocks (storage items) manufactured in the ice making section inside the machine, etc., have insulation to store or store the storage items. Warehouse,
Alternatively, a sleeve or the like for connecting the ice making unit and the heat insulating storage has a heat insulating structure.

For example, as shown in FIG. 12, a sleeve used for an ice making machine has an interior 10 formed of a resin material in a rectangular tube shape.
A heat insulating material 14 made of urethane foam or the like is provided between the interior 10 and the exterior 12 in a state where the exteriors 12 formed in a U-shape by a sheet metal material are attached to the outside of the four surfaces while maintaining required gaps. Is injected and foamed to produce a heat insulating structure filled with the heat insulating material 14.

[0004]

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 the mating surface. As shown in FIG.
6 is pasted. Therefore, it is pointed out that the number of parts increases and the number of assembling steps also increases. Moreover, even when the tape 16 is attached, the heat insulating material 14 leaks from the mating surface to the outside due to the foaming pressure of the heat insulating material 14,
There was a disadvantage that the quality was impaired. When the heat insulating material 14 is injected between the interior 10 and the exterior 12 and foamed, the foaming pressure may deform the interior 10 or the exterior 12. Positioning and fixing were required, and workability was poor.

[0005]

SUMMARY 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 in order to preferably solve the problem. It is an object of the present invention to provide a structure using a rotomolded part which can be manufactured by the above method and a method for assembling the same.

[0006]

[Means for solving the problems] To overcome the above-mentioned problems,
In order to appropriately achieve the intended purpose, the structure using the rotational molded part according to the present invention is a structure using the rotational molded part, and the rotational molded part having a rib formed on the outer surface thereof. An exterior member having an engagement hole into which the rib can be inserted is provided on an outer side under an engagement action between the rib and the engagement hole.

[0007] In order to overcome the above-mentioned problems and appropriately achieve the intended object, a method for assembling a structure using a rotationally molded part according to the present invention is a method for assembling a structure using a rotationally molded part. A first bent portion formed integrally with a rib on an outer surface of one end of the rotomolded part, and formed so as to face one end and the other end of the rotomolded part where the rib is formed; A second bent portion is formed of a rotary molded part while an exterior member made of a sheet metal material having a second bent portion is fitted and engaged with the rib in an engagement hole formed in the first bent portion. It is characterized by being brought into contact with the other end and fixed by fixing means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a structure using a rotationally molded component according to the present invention and a method for assembling the same will be described below with reference to the accompanying drawings by way of preferred embodiments.
In the embodiment, as an example of the structure, a sleeve used in an ice 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 general members are used. It can be used for

As shown in FIG. 1, a sleeve 20 as a preferred embodiment of a structure using a rotomolded component is a heat insulating member made of a resin and formed in a rectangular cylindrical shape containing a foamed heat insulating material 22.
(Rotation molded part) 24 and four exterior members 26, 26, 27, 27 attached outside the heat insulating member 24. The heat insulating member 24 is a rotary molded part manufactured by charging a foamable material (foamed heat insulating material 22) together with powdered plastic in a mold and heating the mold while rotating the mold. As shown in FIG. 7, a powdered plastic forms a skin 28, and a layer of a foamed heat insulating material 22 in which a foamable material is foamed and expanded is formed therein. In addition, on the upper surface (the outer surface at one end) of the heat insulating member 24, FIG.
As shown in the figure, a plurality of ribs 30 rising at a required height are integrally formed at predetermined intervals. By the way, in the example,
As shown in FIGS. 1 and 2, five ribs 30 are formed on the long side and three ribs 30 are formed on the short side of the upper surface of the heat insulating member 24.

As shown in FIG. 1, each of the first exterior members 26 arranged corresponding to the short sides of the heat insulating member 24 is formed by bending a sheet metal having a required thickness into a U-shaped cross section. So,
The length dimension is set to be substantially the same as the short side of the heat insulating member 24. The first bent portion 2 on the upper side of the first exterior member 26
In 6a, engagement holes 32 are formed at positions corresponding to the three ribs 30 formed on the short side of the heat insulating member 24, respectively. Then, in a state where the rib 30 is inserted and engaged in each engagement hole 32, the lower second bent portion 26 b of the first exterior member 26 abuts on the lower surface (the other end) of the heat insulating member 24, and both , 24
Is fixed by a plurality of screws 34 as fixing means (see FIG. 5).

Further, as shown in FIG. 1, each second exterior member 27 disposed corresponding to the long side of the heat insulating member 24 has
It is formed by bending a sheet metal having a required thickness into a U-shaped cross section, and its length is set to be substantially the same as the long side of the heat insulating member 24. In addition, the first bent portion 27a on the upper side of the second exterior member 27 has a 5
An engagement hole 32 is formed at a position corresponding to each of the ribs 30. Then, in a state where the rib 30 is inserted and engaged in each of the engagement holes 32, the second bent portion 2 on the lower side of the second exterior member 27 is formed.
7b contacts the lower surface (the other end) of the heat insulating member 24,
b, 24 are configured to be fixed by a plurality of screws 34 as fixing means. In addition, at both ends in the longitudinal direction of the first bent portion 27a and the second bent portion 27b of the second exterior member 27 corresponding to the long side of the heat insulating member 24, the first exterior member 26 of the short side is provided. Notches 38 are respectively formed so as not to vertically overlap the first bent portion 26a and the second bent portion 26b.

A heat insulating plate 36 having a required thickness and flexibility as a cushioning material is adhered to the inner surfaces of the main bodies 26c and 27c facing the outer surfaces of the heat insulating members 24 of the exterior members 26 and 27. The heat insulating plate 36 is configured to prevent a gap from being generated between the exterior members 26 and 27 due to variations in the dimensions of the member 24 (see FIG. 5). As the heat insulating plate 36, for example, polyethylene foam having a high expansion ratio is suitably used.

[0013]

Next, the actual operation of the method for assembling the sleeve having the above-described structure will be described. With respect to the heat-insulating member 24 having the ribs 30 formed on the upper surface, the corresponding short-side or long-side ribs 30 are respectively bent into the first bent portions 26a, 2a.
The outer member 26,
27 are attached respectively. Next, with the second bent portions 26b, 27b of the exterior members 26, 27 in contact with the lower surface of the heat insulating member 24, the second bent portions 26b, 27b are screwed to the lower surface of the heat insulating member 24. (See FIG. 5).
As a result, the sleeve 20 having the heat insulating structure in which the outside (the outer side surface, the upper surface, and the lower surface) of the heat insulating member 24 is covered with the exterior members 26 and 27 is assembled.

Here, as described above, the heat insulating member 24, which is a rotary molded part manufactured by charging a foamable material together with the powdered plastic into the mold and heating the mold while rotating the mold, has a dimension of the same. The accuracy is low, and the dimensions vary depending on the product. On the other hand, the exterior members 26 and 27 formed of a sheet metal material can be accurately formed to required dimensions. Therefore, the first bent portions 26a, 27a and the second bent portions 26b, 27b of the exterior members 26, 27 are separated and bent in accordance with the maximum allowable height dimension of the heat insulating member 24, for example. By doing so, it is possible to cope with variations in the dimensions of the heat insulating member 24.

That is, if the height dimension of the heat insulating member 24 is the minimum allowable value, as shown in FIG.
The upper surface of the heat insulating member 24 whose lower surface is in contact with the second bent portions 26b, 27b of 7 is separated downward from the first bent portions 26a, 27a. However, even in this case, the rib 3
0 is engaged with the engagement hole 32, so that
The heat insulating member 24 and the exterior members 26 and 27 are assembled in a state where they are securely positioned under the engagement operation of No. 2. Further, if the height dimension of the heat insulating member 24 is the maximum allowable value, as shown in FIG.
The upper surface of the heat insulating member 24 whose lower surface abuts against the first bent portions 26a and 27a and the rib 30
2 and the heat insulating member 24 and the exterior members 26 and 27 are securely assembled in a positioned state. Further, the variation in the thickness direction of the heat insulating member 24 is absorbed by the deformation of the heat insulating plate 36, and the sleeve 20 having a small gap between the heat insulating member 24 and the exterior members 26 and 27.
Is obtained. When a gap is formed between the upper surface of the heat insulating member 24 and the first bent portions 26a, 27a of the exterior members 26, 27 as shown in FIG. 5, the first bent portion is filled to fill the gap. A cushion material may be provided on the lower surfaces of the portions 26a and 27a.

Since the sleeve 20 is constructed by assembling the exterior members 26 and 27 to the outside of the heat insulating member 24 made of a rotationally molded component as described above, it is not necessary to inject a heat insulating material into the sleeve 20 when assembling the sleeve 20 and foam it. There is no need to attach a sealing tape or use a foaming jig, so that the number of parts can be reduced, work efficiency can be improved, and the device can be manufactured at low cost. Moreover, in the configuration of the embodiment, even if the heat insulating member 24 has a dimensional variation, the heat insulating member
6, 27 can be securely fixed. Furthermore, in the heat insulating member 24 made of a rotationally molded component, since there is no small gap in the skin 28, water or the like does not enter inside, and it is possible that the foam heat insulating material 22 is deteriorated and the heat insulating effect is reduced. Absent.

Here, the sleeve 2 according to the above-described embodiment is used.
0 is an ice storage 40 and an ice making mechanism 42 as shown in FIG.
And an ice making unit 46 having a freezing mechanism 44, and is used to increase the amount of ice stored in the ice blocks. In this case, when the rib 30 protrudes upward from the respective engagement holes 32 of the first bent portions 26a and 27a on the upper surface of the sleeve 20, which is the installation surface of the ice making unit 46, as shown in FIG. Irregularities are formed on the installation surface, and a gap is generated 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 unit 46, the gap can be closed to some extent but is insufficient.

If a gap is formed between the sleeve 20 and the ice making section 46, the following problem occurs. When the cool air inside the ice storage 40 leaks from the gap and the surrounding environment is high in temperature, the internal temperature of the ice storage 40 rises, the ice blocks are easily melted, and the ice making capability of the ice making mechanism 42 also decreases. When the location of the ice storage 40 is hot and humid as in a kitchen or the like, dew condensation generated on the exterior members 26 and 27 around the gaps is dripped on the floor and wets the floor. Becomes slippery. The inside of the ice storage 40 through the gap, bacteria, dust,
Insects are likely to enter and become unsanitary. When the ice making unit 46 is placed on the sleeve 20 via the plate, the load of the ice making unit 46 is applied only to the portion of the plate corresponding to the rib 30, so that the plate is easily broken, and the ice making unit 46 is placed on the sleeve 20. In the work of placing the ice making unit 46 in the fixed position, the worker must work the ice making unit 46 without dragging the upper surface of the sleeve 20, and the workability is inferior. If there is a projection such as a screw head on the bottom surface of the ice making unit 46, the plate may be hooked and broken. When reattaching a torn plate, it is easy to break because the plate is made of foam, and the
Adhesive (double-sided tape etc.) for bonding to the sleeve 20
It remains on the upper surface of the device, and requires a troublesome work of removing it.

Therefore, in a sleeve 48 according to still another embodiment shown in FIGS. 8 to 11, four insulation boards 50 as gap members are provided on the upper surfaces of the exterior members 26 and 27 attached to the heat insulating member 24. , 50, 52, and 52 are attached to solve the various problems described above. Note that the other configuration of the sleeve 48 according to still another embodiment is the same as that of the sleeve 20 according to the above-described embodiment, and thus only different portions will be described.

That is, each first insulation board 50 adhered to the short side of the heat insulating member 24.
As shown in FIG. 8, is formed in a rectangular shape having a required thickness using, for example, polyethylene foam as a material, and is set to a size capable of substantially covering the short side of the heat insulating member 24. In the first insulation board 50, fitting holes 54 are vertically formed as fitting portions at positions corresponding to the three ribs 30 formed on the short side of the heat insulating member 24, respectively. ing. Then, each rib 30 protruding from the first bent portion 26a of the first exterior member 26 is fitted to the corresponding fitting hole 54.
In this state, the lower surface of the board 50 is attached to the upper surface of the first bent portion 26a via a double-sided tape or the like. Note that the thickness of the first insulation board 50 is set to be greater than the protrusion dimension of the rib 30 from the upper surface of the heat insulating member 24, and as shown in FIG.
Even when the rib 30 projecting to the maximum from the bent portion 26a is inserted into the fitting hole 54, the rib 30 is
So that it does not protrude from the upper surface.

On the entire upper surface of the first insulation board 50, as shown in FIG.
6 is stuck. As the protective tape 56, for example, a PET (polyethylene terephthalate) film, which is sufficiently strong even if it is thin, is hard to tear and is slippery, is preferably used. The protective tape 56 can be deformed according to slight irregularities.

Each of the second insulation boards 52 attached to the long side of the heat insulating member 24 has basically the same configuration as the first insulation board 50 attached to the short side. And a fitting hole 54 as a fitting portion.
However, the only difference is that they are formed at positions corresponding to the five ribs 30 formed on the long sides of the heat insulating member 24, respectively.

The insulation board 5
For example, 0.52 is manufactured by punching a sheet-like polyethylene foam with a mold, cutting with a cutting tool, or extruding. In addition, polyethylene foam is a material that conforms to the Food Sanitation Law because it contains a large number of closed cells and thus hardly contains water, and is suitable as a material for the insulation boards 50 and 52.

As described above, by attaching the insulation boards 50 and 52 to the upper surfaces of the exterior members 26 and 27, the following operation and effect can be obtained. Each fitting hole 54 of the insulation boards 50 and 52
Since the ribs 30 protruding from the first bent portions 26a, 27a of the exterior members 26, 27 are inserted into the upper surfaces of the sleeves 48, as shown in FIG.
52), and the sleeve 48 has no ice making part 4
No gap is generated even if 6 is placed. Therefore, the ice storage 40
To prevent the cooling air from leaking out, prevent the melting of ice blocks and prevent the performance of the ice making mechanism 42 from deteriorating.
It is possible to suppress the dew condensation of 6,27 and prevent the installation floor surface from getting wet and becoming unsanitary. Furthermore, dust and insects do not enter the interior of the ice storage 40, and can be kept hygienic at all times. Fitting holes 54 of insulation boards 50 and 52
Is covered with the protective tape 56, so that the sleeve 48
Even if there is a fitting hole 54 that is not hidden even when the ice making part 46 is placed on the inside, no dew condensation water, dust and the like accumulate inside the hole 54. Further, the exterior member 2 communicated through the fitting hole 54
It is possible to prevent dew condensation water, dust, and the like from entering the backside of 6, 27. 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 specific portions of the insulation boards 50 and 52, and the protective tape 56 has a required strength and is torn. Since it is difficult and slippery, when the ice making part 46 is placed on the sleeve 48, even if the ice making part 46 is slid on the insulation boards 50 and 52, the ice making part 46 is hardly broken and the workability is improved. That is,
Since the ice making unit 46 can be moved to an appropriate position by slightly sliding the ice making unit 46 on a part of the sleeve 48, the installation work becomes easy. In particular, this is advantageous in a case where the ice making unit 46 cannot be supported by a large number of people in the installation work of the ice making unit 46 in a narrow space. Since the protective tape 56 is hard to tear,
There is little chance that the insulation boards 50 and 52 will be torn and need to be re-applied.
The troublesome work of removing (double-sided tape or the like) can be avoided. The insulation boards 50, 52 are attached to the exterior members 26, 27 with reference to the fitting holes 54 fitted in the ribs 30.
Can be easily attached to the boards 50 and 52. 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 unit 46, the protective tape 56 is deformed in accordance with the protrusion and no gap is generated between the protection tape 56 and the ice making unit 46. 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 to the upper surfaces, so that dirt hardly accumulates and can be used hygienically. Since the fitting holes 54 are simply removed from the sheet-like insulation boards 50 and 52 with a mold and the protective tape 56 is stuck on the upper surface, the production can be performed at low cost.

In this embodiment, the structure having a heat insulating structure has been described. However, the structure may not have the heat insulating structure. The fixing means for fixing the heat insulating member and the exterior member is not limited to a screw, and other members such as rivets and bolts and nuts can be used. In the gap member attached to the upper surface of the exterior member, the fitting portion into which the rib is inserted may not be a hole penetrating vertically, but may be a concave portion opened only on the lower surface side. Furthermore, the gap member is a rotationally molded part.
The heat-insulating member is not limited to being divided so as to correspond to the short side and the long side, and may be a rectangular frame-shaped integral body corresponding to the upper surface shape of the rotomolded part.

[0026]

As described above, according to the structure using the rotomolded part and the method for assembling the same according to the present invention,
It is possible to reliably assemble the rotationally molded part and the exterior member having variations in dimensions. In addition, the use of the heat insulating member, which is a rotationally molded component, has the advantage that a heat insulator or a sleeve for a refrigerator or an ice maker requiring heat insulating properties can be manufactured simply and in a short time with a small number of components.

[0027] By attaching a gap member having a fitting portion into which a rib formed on the upper surface of the roto-molded part can be inserted and fitted, to the upper surface of the exterior member attached to the roto-molded component, Irregularities due to ribs were prevented from being formed on the upper surface of the component. Accordingly, when the ice making part or the like is placed on the upper surface of the rotary molded part, no gap is generated between the two, and various problems caused by the gap can be prevented. In addition, since the protective tape is stuck on the upper surface of the gap member, the work of installing the ice making section and the like becomes easy, and the 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 the embodiment.

FIG. 3 is a side view of the sleeve according to the embodiment.

FIG. 4 is a vertical sectional side view of a heat insulating member in the sleeve according to the embodiment.

FIG. 5 is a vertical sectional side view of a main part of the sleeve according to the embodiment.

FIG. 6 is a vertical sectional side view of a main part of a sleeve according to another embodiment.

FIG. 7 is a partially cutaway front view showing the ice making machine using the sleeve according to the 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 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 sleeve according to the related art.

FIG. 13 is a vertical sectional side view of a main part of a sleeve according to a conventional technique.

[Explanation of symbols]

22 foam insulation material, 24 heat insulation member (rotation molded part), 26
First exterior member 26a First bent portion, 26b Second bent portion, 27 Second exterior member 27a First bent portion, 27b Second bent portion, 30 rib, 32 engagement hole 34 Screw (fixing means) , 50 1st insulation board (gap member) 52 2nd insulation board (gap member), 54
Fitting hole (fitting part) 56 Protective tape

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29K 101: 00 105: 04 B29L 9:00 (72) Inventor Hiroki Ito 3rd of Sakaemachi Minamikan, Toyoake City, Aichi Prefecture 16 Inside Hoshizaki Electric Co., Ltd. (72) Inventor Shinzo Kozuka 3-16, Hoshizaki Electric Co., Ltd., Aichi Pref., Japan

Claims (5)

[Claims] 1. A structure using a rotomolded component (24), wherein the rib (30) is inserted and inserted outside the rotomolded component (24) having a rib (30) formed on an outer surface. An exterior member (26, 27) in which a possible engagement hole (32) is drilled is assembled under an engagement action between the rib (30) and the engagement hole (32). Structure using rotationally molded parts. 2. The structure according to claim 1, wherein the rotomolded component is a resin heat insulating member (24) including a foamed heat insulating material (22). 3. The rib (30) is formed on the upper surface of the rotomolded part (24), and the rib (30) is attached to a gap member (50, 52) set to have a thickness larger than the projecting dimension of the rib (30). Fitting part that can be inserted
(54) is formed, and the gap member (50, 52) is attached to the upper surface of the exterior member (26, 27) in a state where the rib (30) is inserted into the fitting portion (54). A structure using the rotary molded part according to 1 or 2. 4. A structure using a rotationally molded component according to claim 3, wherein a protective tape (56) that is resistant to tearing and slippery is adhered to an upper surface of said gap member (50, 52). 5. A method of assembling a structure using a rotomolded part (24), wherein a rib (30) is provided on an outer surface of one end of the rotomolded part (24).
And a first bent portion (2) formed by bending so as to face one end and the other end of the rotomolded part (24) where the rib (30) is formed.
6a, 27a) and an exterior member (26, 27) made of a sheet metal material having a second bent portion (26b, 27b) is engaged with an engagement hole (32) formed in the first bent portion (26a, 27a). ), The second bent portion (26b, 27b) is brought into contact with the other end of the rotomolded part (24) in a state where the rib (30) is inserted and engaged with the rib (30), and is fixed by the fixing means (34). A method for assembling a structure using a rotomolded part.