KR100191771B1 - Refrigerating container - Google Patents

Abstract

The present invention relates to a refrigerated container (Reefer Container), to reduce the weight of the container itself, fatigue does not accumulate in the load generated during operation, to provide a refrigerated container made of a material that does not corrode by sea water, etc. There is a purpose.

In the present invention, the panel, the rail, the frame and the door assembly, the composite material alone forms a multi-layer structure, the multilayer material composite and steel laminates, the composite material and the foam of a multi-layer laminated structure It is composed of any one structure selected from the form, the composite material is characterized in that the two or more selected from the woven glass fiber, roving glass fiber, woven carbon fiber, roving carbon fiber to form a multi-layer structure. .

Description

Refrigerated containers

The present invention relates to a freezing container (Reefer container), and in particular to a lightweight container using a composite material consisting of a multi-layer structure, but to a durable refrigeration container that does not accumulate fatigue fatigue load does not easily occur.

In general refrigeration container structure, the frame is basically supported in front and rear, between the frame edge between the rail in the longitudinal direction of the container, the side panel is coupled between the rails on both sides, the roof panel is coupled to the top, At the bottom, a subfloor panel and a T-floor for forming a refrigerator airflow space on the base assembly are coupled in layers, and a rear door assembly composed of two pairs is hinged to the frame so as to be opened and closed by a door.

That is, when the members constituting one refrigerated container are divided into panels, rails, and frames when largely divided, this will be described with reference to an exploded perspective view of FIG. 1.

As described above, the panel includes a side panel 1 (1 '), a roof panel 2, and a sub floor panel 3.

Said rails are side top rails which are coupled to the upper end of the side panels 1 and 1 'in the longitudinal direction, thereby joining the roof panel 2 and the side panels 1 and 1' and the frame. (4) (4 '); Side bottom rails (5) for coupling the base assembly 10, the side panel (1) (1 ') and the frame by being fitted in the longitudinal direction at the bottom of the side panel (1) (1') (5 '); And, Tunnel bolster (6) which is integrally coupled between the tunnel bolster 6 and the tunnel (6a) in the lower sub-floor panel (3); A T-floor 7 attached to support the cargo while forming a refrigerator flow space on the bottom sub-floor panel 3; An outrigger 8 coupled to both sides of the tunnel 6a under the subfloor panel 3 at the bottom; And a cross member 9 configured to form a part of the base assembly 10 supporting the subfloor panel 3 and the T floor 7 below the subfloor panel 3 at the bottom.

The frame includes: rear corner posts (14, 14 ') forming posts at the rear edges of the rear (rear) frames; A door seal 15 coupled to the lower portion of the rear frame in a horizontal direction; A door header 16 coupled to the upper portion of the rear frame in a horizontal direction; And front corner posts 17 and 17 'forming posts at the front edges of the front (front) frame; A front top frame 18; And a front bottom rail 19; Etc. Here, reference numeral 11 denotes a front frame assembly, 12 a rear frame assembly, and 13 a door assembly.

The rails, frames, panels, and the like constituting the refrigeration container have been composed of aluminum extrudates, steels, and the like.

That is, among the rails, the side top rail, the side bottom rail, the T floor, and the cross member are made of aluminum extrudates, and the bolster and the outrigger are made of steel extrudates, and the frames include all castings. It was made of steel.

In the above panel, the side panels 1, 1 'and the roof panel 2 form an outer surface by laminating several sheets of aluminum skin, and the rivets are stringers between the plates and the plates. It is connected by the casting, and the inside of the several stainless steel plate is welded to form an inner surface.

And, between the outer surface made of the aluminum plate and the inner surface made of the stainless steel plate is to form a sandwich panel by filling the polyurethane foam as a post-foaming method.

In addition, the sub-floor panel, the outer surface is made of a stainless steel plate, a plurality of guarantee wood is mounted on the upper surface at predetermined intervals, and an aluminum T floor is placed on the upper surface thereof, Between the outer surface and the T floor is formed a polyurethane foam is filled in a post-foaming manner.

However, since such a conventional refrigeration container uses aluminum extrudates or steels as the main materials, the container itself weighs too much, is easily corroded by contact with seawater, and fatigue due to the load generated during operation. Has accumulated and has shown a significant problem of greatly reducing durability.

In other words, in the conventional refrigeration container, the panels are heavy because the surface plate is made of steel, and many parts of the surface plate must be assembled by riveting or welding. It is a problem that breakage frequently occurs, and surface plates made of aluminum or stainless steel and polyurethane foams that are insulated from each other can be maintained in close contact with each other or exhibit heterogeneity that cannot be bonded for a long time. The peeling phenomenon was progressed due to temperature difference, external heat, load and external impact, and the strength was significantly lowered, and the thermal insulation effect was also significantly reduced.

In addition, since the material of the surface plate is made of steel or aluminum, which has a relatively high thermal conductivity, it is easily corroded when exposed to seawater, with a closed end that greatly reduces refrigeration efficiency, resulting in local damage due to external impact or corrosion. Even if it is, even if the partial repair is not possible, the economical problem that is forced to replace the entire panel is occurring.

These problems are widespread in rails as well as panels. In particular, in the case of the side bottom rail which joins a sub floor panel, a side panel, and a frame, as an aluminum extrudate Because of its cross-sectional structure, it is difficult to support all of the container's own weight, which causes deformation or damage in case of severe damage due to vibration or load generated during operation of the vehicle. In addition, since the side bottom rail is located at the bottom of the container, since it is easily exposed to seawater, corrosion occurs intensively, thereby causing a problem that acts as a major threat to the stability of the container despite local damage.

In addition, in the above frames made of steel as the members constituting the frame assemblies 11 and 12, the front corner post and the rear corner post, which are the pillars of the frame assembly, are thick as the main members responsible for the load of the container. Since steel is welded to form a structure, it acts as a significant cause to increase the weight of the container itself, and these members are also deformed and corroded by being exposed to harsh environments such as high temperature and cryogenic seawater. This intensive vulnerability has been shown.

The present invention has been made to solve the above problems, significantly reducing the weight of the container itself to reduce the weight, to suppress the accumulation of fatigue against the load generated during operation, and also to eliminate the corrosion factors caused by seawater, etc. The main purpose is to provide a high-strength refrigerated container using a composite material with a markedly improved life.

Another object of the present invention is to provide a refrigerated container having increased stability that does not cause rupture of the side bottom rail even when subjected to vibration and load due to its own weight during container movement.

Another object of the present invention is maintenance, which does not cause delamination due to external heat, load or impact, and has a relatively low thermal conductivity, and selectively repairs and replaces only the broken part when local damage occurs. An extremely easy refrigeration container is provided.

1 is an exploded perspective view of a refrigerated container to which the present invention is applied.

2 is a cross-sectional view of the rear corner post of the present invention, taken along the line II-II of FIG.

3 is a side cross-sectional view of the panel of the present invention, taken along line III-III of FIG.

4 is a cross-sectional view of the side brace rail of the present invention, taken along the line IV-IV of FIG.

FIG. 5 is a cross-sectional view of the front corner post of the present invention, taken along the line VV of FIG. 1; FIG.

The present invention, in order to achieve the above object, the present invention is a panel, rails, frames and door assembly, the composite material alone form a multi-layer structure, or the multi-layered composite material and steel, laminated form, multilayer composite The panel is made of any one member selected from a laminated form of a material and a foam, and the panels are sewn in a fiber thread in a state where a single layer of fabric fibers are wrapped on both sides of the slice foam, and the outer surface of the glass fiber and fabric of the roving shape The glass fibers cross each other and are repeatedly laminated to form a layer to form a laminated material of a composite material and a foam; The rails are arranged to form a layer by arranging each of the fabric glass fibers and roving glass fibers wound on the bobbin to repeat each other, but a plurality of layers of fabric carbon fibers and roving carbon fibers are laminated on the core part under load. Impregnated with the thermosetting resin to form a composite material alone; The frame is composed of a laminated form of a composite material and steel by curing in a state of wrapping a plurality of glass fibers and a carbon fiber constituting the core on the outer surface of the steel, and a plurality of glass fibers stacked on it in turn. It is characterized by.

The woven, glass fibers and woven carbon fibers include those that are positioned in the form of woven fabrics, nonwoven fabrics, and bundles. In the case of a nonwoven mat, it is more advantageous to have an even tensile force in various directions such as a cross direction and a diagonal direction than a woven mat having directivity when a tension force is applied.

According to the present invention, each part of the freezing container is formed by the stitching method alone, or integrally with the composite material forming a multi-layer structure, or integrally with steels, foams, or the like, or by the autoclaving method or the pulverization method. Since the specific gravity is lowered, the weight is greatly reduced, the durability is significantly increased without corrosion, and the desired elasticity is retained. Thus, it is possible to provide a freezing container having excellent physical properties without accumulation of fatigue.

In the present invention, the panel suppresses the surface heat absorption and the thermal conductivity is very low, so that the refrigerating efficiency is remarkably increased, and even if the external surface is composed of a composite material, even if local breakage or damage occurs The parts can be easily repaired by a method such as heat treatment after resin coating, and there is no welding process after the molding process, so that assembly and partial replacement can be made very easily.

As the bonding structure of the fibers used in the composite material according to the present invention, fibers of a fabric and fibers of a roving are used. The fabric structure is a structure in which each fiber is intersected and bonded regularly, and exhibits uniform properties in all directions such as tension and strength. The roving structure is a structure in which main fibers are arranged in one direction and has a strong tension and strength in the direction of the main fiber. However, in the direction perpendicular to the main fiber, the tensile and strength properties are very weak. Therefore, the composite material according to the present invention, it is preferable to configure so that the roving-like fibers and the fabric-like fibers are intersected with each other and laminated to form a layer, so as to be closely bonded to each other and to improve the overall strength.

The fibers constituting the composite material are used in woven, bundled and nonwoven fabrics. The woven state refers to using a plurality of fiber yarns in a straight state in a bundle, the bundle state refers to using a bundle of a plurality of fiber yarns in a bundle, the non-woven state is disorderly entangled without being organized It refers to the use of compressed fibers with a certain thickness.

The non-woven fiber is simple to manufacture, but the strength and appearance is bad, the fiber in the bundle state has a good strength, but the appearance is bad, the fiber in the woven state is smooth and beautiful appearance but the fiber in the bundle state It has a disadvantage in that the strength is inferior.

Therefore, when manufacturing the composite material of the present invention, it is desirable that the inner surface to have the highest strength using the fiber in the bundle state, the outermost surface to have a beautiful appearance using the fiber yarn in the woven state. will be.

Hereinafter, with reference to the accompanying drawings with respect to a preferred embodiment of the present invention, the overall structure of the refrigeration container is referred to FIG.

In the freezing container structure of the present invention, the frames are molded by an autoclave method by laminating composite materials on the outer surface of steel.

The autoclave method, using a mat made from a certain condition by impregnating a glass fiber or carbon fiber made of fabric into a resin, the mat is a semi-finished product hardened so that the resin does not flow down in multiple layers Lay it and put it in a heated cooker in a major state and apply it at a pressure of about 1.5kg / ㎠ and a temperature of about 130 ℃ for a certain time (for example, 150 minutes) to get the finished product.

The main frame portion in the front frame assembly and the rear frame assembly, which are the frames, forms a structure in which four corner castings and a steel frame are integrally welded, and then a composite material is bonded to the outer surface of the steel frame in a multi-layer. At this time, the composite material, the structure is completed by curing in a state of wrapping a plurality of glass fibers, a plurality of carbon fibers and a plurality of glass fibers in turn on the outer surface of the steel frame.

FIG. 2 is a view for explaining the lamination form of a structure composed of a composite material, which is a partial enlargement of the rear corner posts 14 and 14 ', which is a cross-section of the II-II line of FIG. It is shown in 1 specifically.

In the figure, P01 and P02 are woven glass cloth, P02, P04, P06, P15 and P19 are woven glass roving cloth, and P03, P05, P16 and P18 are roving Glass UD-roving, P07, P09, P12 and P14 are roving carbon fiber, and P08, P10, P11 and P13 are woven carbon cloth. It is shown. In the above, UD means unidirection, and the enlarged part of the drawing omits a cross section of the steel S in order to show the configuration of the composite material in detail.

And, in the embodiments of the present invention, the glass fiber on the fabric is 0.45mm thick, the roving glass fiber is 0.8mm thick, the carbon fiber on the fabric is 0.14mm thick, and the roving carbon fiber is 0.2 mm thick ones were used.

That is, the rear corner posts 14 and 14 'are laminated with multilayer composite materials P20 to P01 on the outer surface of the steel S, and then hardened by the autoclave method. Multi-layered glass fibers (P20 to P15) are sequentially laminated on the outer surface of (S), and multi-layered carbon fibers (P14 to P07) are sequentially stacked thereon to form the core of the composite material, and the multi-layered glass fibers (P06) thereon. P01) are sequentially stacked to form the outermost surface.

Glass fibers (P20a to P15a) and carbon fibers (P14a to P11a) on the upper open side of the enlarged portion are laminated after being laminated using a separate mold.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 1 to show the configuration of the front corner posts 17 and 17 'forming the struts in the front frame assembly 11, and shows the outer surface of the steel structure 105. FIG. It is composed of a structure wrapped around the composite material 106 made of a multi-layer fiber. Even in this case, the composite material 106 is hardened by an autoclave method in a state in which multilayer glass fibers, multilayer carbon fibers, and multilayer glass fibers are sequentially stacked on the steel structure 105 to be integrally formed to form a second layer. It is configured to form the same layer.

The carbon fiber is laminated to the core of the composite material as described above. The carbon fiber is superior in strength and rigidity to glass fiber, but the price is high, so it is used only in a part of the core material responsible for the main load.

Then, the structure of each component member using the composite material as a preferred embodiment for achieving the object of the present invention will be described in detail.

The construction of the frame assembly;

Four corner castings and 6 mm thick steel were welded integrally, laminated on the outer surface of each steel in multiple layers of composite material, and then hardened by autoclave to complete the frame assembly.

Example 1

20 layers of glass fibers were laminated on the steel surface, and the composite material having a thickness of 12.5 mm was formed by repeatedly arranging the glass fibers on the fabric and the glass fibers on the roving. The frame produced by Example 1 exhibited the physical properties as shown in Table 2 when compared with the conventional steel frame.

Example 2

6 layers of glass fibers, 8 layers of carbon fibers, and 6 layers of glass fibers were sequentially stacked on the surface of the steel, and a composite material having a thickness of 8.86 mm was formed by repeatedly arranging the fabric fibers and the roving fibers. The frame produced by Example 2 exhibited physical properties as shown in Table 2 when compared with the conventional steel frame.

Example 3

On the surface of the steel, 8 layers of glass fibers, 4 layers of carbon fibers, and 8 layers of glass fibers were sequentially stacked, and a composite material having a thickness of 10.68 mm was formed by repeatedly arranging the fibers of the fabric and the fibers of the roving. The frame produced by Example 3 exhibited physical properties as shown in Table 2 when compared with the conventional steel frame.

As can be seen through the above embodiments, in order to have improved strength than the steel monolith constituting the conventional frame assembly, it is confirmed that at least 8 or more carbon fibers are laminated at the core of the composite material laminated in 20 layers. When observing this in the volume ratio, it was desirable to maintain 15% of the thickness of the entire composite material.

Frames made of such composites were playing a dominant role in significantly reducing the weight of the entire refrigerated container, and it was confirmed that the frames exhibited much improved effects in corrosion resistance, vibration damping and sound insulation.

Composition of panels for refrigerated containers;

Panels of the refrigeration container according to the present invention, each of the outer surface of the slice foam is sewn in a fiber yarn in the state of embedding one layer of fabric fibers (glass fiber), respectively, laminated on the outer surface of both sides of a plurality of glass fibers, then One sandwich panel integrally molded by the autoclave method is preferably used.

As the slice foam, it is preferable to use a polyurethane foam having excellent heat insulating property, and a so-called stitching method is used in which both sides of the fabric are stitched in a zigzag with a fiber thread in a state where fabric glass fibers are layered one by one.

The reason why the panel is molded by the autoclave method is to simplify the manufacturing process of a panel having a wide width and a long length by manufacturing a sandwich panel integrally molded into one sheet.

3 is a side cross-sectional view taken along line III-III of FIG. 1 to show the configuration of the panel using the composite material according to an embodiment of the present invention, one sheet of glass fiber (on each side of the slice foam 102) 112 is sewn in place with fibers 101 to fix the shape of the slice foam 102, and laminated the composite material (C) on the outer surface of each glass fiber 112 on both sides, and then hardened by the autoclave method It is shown to be molded integrally.

Since the panel of the refrigeration container according to the present invention does not receive a large load, the composite material (C) is sufficient to be laminated only with glass fiber, and the composite material (C) is a roving glass fiber. Of course, the glass fibers on the fabric is configured to cross and laminated.

In addition, the outermost surface of the composite material (C) forming the surface of the panel can be composed of a film (surface veil) of the same material as the glass fiber, using a separate crossing member for the end portion Strength may be reinforced.

Panels applied to the refrigeration container of the present invention is sewn into a fiber thread in a state in which a piece of 0.45 mm thick glass fiber is placed on both outer surfaces of the slice foam having a thickness of 60 mm, and each layer is a multi-layer composite material on the outer surface of each glass fiber. After stacking several layers, it is hardened by autoclave method and completed.

Example 4

Two layers of glass fibers were respectively laminated on both sides of each glass fiber sewn on both sides of the slice foam, and a panel having a total thickness of 63.4 mm was prepared by arranging the glass fibers on the fabric and the glass fibers on the roving. Panels produced by Example 4 exhibited the physical properties as shown in Table 3 when compared with the conventional panels.

Example 5

Three layers of glass fibers were respectively laminated on both outer surfaces of the glass fibers sewn on both sides of the slice foam, and a panel having a total thickness of 65 mm was prepared by arranging the glass fibers on the fabric and the glass fibers on the roving. Panels produced in Example 5 exhibited the physical properties as shown in Table 3 when compared with the conventional panels.

Example 6

Four layers of glass fibers were laminated on both sides of each glass fiber sewn on both sides of the slice foam, and a panel having a total thickness of 65.9 mm was prepared by arranging the glass fibers on the fabric and the glass fibers on the roving. The panels produced by Example 6 at all times exhibited the same physical properties as in Table 3 when compared with the conventional panels.

Referring to the above embodiments, it was found that in order to maintain the strength not less than that of the conventional aluminum / steel combination, it is sufficient to stack three or more layers of glass fibers on both outer surfaces of the slice foam.

That is, compared with the conventional panels made of aluminum / steel combinations, the composite material bonded as in Examples 5 and 6 can significantly reduce the weight of the entire container while maintaining sufficient strength. It was excellent in weatherability and corrosion resistance adapted to the seasons and the environment, and improved heat insulation performance by low heat transfer rate.

In addition, the panels made of the composite material can be prevented from being peeled off due to the strong adhesion between the surface and the polyurethane foam being integrally formed, and the broken part in case of local breakage during operation of the container. The local breakage could be easily repaired by removing the area around and then curing the area with polyurethane foam and composites, and it was found that it had no significant effect on durability or other physical properties. .

The configuration of rails for refrigerated containers;

The rails are formed of a composite material alone, and since most of the rails have a long shape with the same cross section, they are produced by a pulsation process similar to a kind of drawing.

The pultrusion method is used in the production of long products having the same cross section in the longitudinal direction, and includes: fiberglass fibers, mats of carbon fibers, rovings, and rovings The carbon fiber is transferred into a heating mold while impregnated with a thermosetting resin. The thermosetting resin includes an epoxy resin, a fluoropolyethylene, a vinyl ester, and a curing agent.

At this time, the glass fiber and the carbon fiber is heated in an equal distribution state in the mold, and hardening takes place while cooling and exiting the mold to be commercialized. On the other hand, when each of the fibers are guided into the mold has a shape and structure required by going through the guide of several stages.

Among the above-mentioned lays, the side top rail is formed so that the woven glass fibers and the roving glass fibers are formed in multiple layers. This is because the side top rail is assembled between the roof panel and the side panel and is relatively loaded, so that carbon fiber is not used. It is not.

Among the rails, the side bottom rail, the bolster, the outrigger, and the cross member are formed to have a multi-layered fabric carbon fiber and a roving carbon fiber in a core portion, each of which is loaded at the bottom side. In order to reinforce its strength, carbon fiber having a higher strength than glass fiber is laminated to the core of the composite material.

Meanwhile, among the rails, the T floor is attached to the upper surface of the sub floor panel with an adhesive, and the T floor and the sub floor panel form one floor assembly on the base assembly.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1 to show the configuration of the side bottom rails 5 and 5 'obtained by the pulverization method. As shown in FIG. 107, which has a structure in which carbon fibers 104 are laminated in a multi-layered structure, and is formed to form a U-shaped insertion portion 103 into which a side panel can be fitted, so that the side panel can be stably supported. Is produced.

Using the composite material according to the present invention to produce the rails as follows, to complete the rails using the pulverization method as a multi-layer composite material alone.

Example 7

After arranging the glass fibers on the fabric and the roving phases to cross the glass fibers repeatedly, a 5 mm thick composite material was formed through the mold. The rails produced in Example 7 exhibited the physical properties as shown in Table 4 as compared with the conventional rails.

Example 8

After arranging the glass fibers on the fabric and the glass fibers on the roving to cross repeatedly, a 7 mm thick composite material was formed by passing through a mold. Rails produced in Example 8 exhibited the physical properties as shown in Table 4 when compared with the conventional rails.

Example 9

Carbon fiber on the core and glass fibers on both sides are laminated, but the fabric fibers and roving fibers are arranged so that they cross repeatedly, and then passed through a mold. 6mm thick carbon fibers on the core and 3mm on both sides A total thickness of 12mm thick composite material was made by stacking glass fibers. Rails manufactured according to Example 9 exhibited physical properties as shown in Table 4 when compared with conventional rails.

Example 10

The carbon fiber is laminated on the core and the glass fiber is laminated on both outer surfaces, but the fabric fibers and the roving fibers are arranged so as to cross repeatedly, and then passed through a mold. The carbon fibers are 4mm thick on the core and 4mm on both sides. A total thickness of 12mm thick composite material was made by stacking glass fibers. Rails manufactured according to Example 9 exhibited physical properties as shown in Table 4 when compared with conventional rails.

Referring to the above embodiments, in order to maintain the improved strength compared to the side bottom rail made of a conventional aluminum extrusion, it can be seen that at least 6mm thick carbon fiber should be stacked in the center of the total thickness of 12mm, which is the volume ratio In case of converting to, it was found that it corresponds to more than 50% of the thickness of the entire composite material. It can be seen that the material can be applied.

In addition, it was found that in the case of the side top rails subjected to a relatively low load, sufficient rigidity can be maintained only by glass fibers laminated to a thickness of 7 mm.

In other words, the rails made of the composite material not only reduce the weight of the refrigeration container itself, but also sufficiently absorb vibrations and loads generated during operation of the container due to the excellent energy absorption of the composite material. It is possible to prevent deformation or breakage of the fastening part. In addition, it is possible to prevent corrosion by seawater due to the characteristics of the composite material excellent in corrosion resistance.

The configuration of the door assembly for the refrigerated container;

The door assembly of the container, as in the embodiment for the side bottom rail, the door beam and the door rod beam, which is a reinforcement structure by the pulverization method, is integrally formed with the door panel by the autoclaving method, which is also described above. You can expect the same effect.

The door beam is located vertically at the corner of the center of the rear inner surface of the door, the door rod beam of the bracket for rotatably holding the rod installed in the vertical direction when operating the lock handle from the rear of the door It is located inside the rear panel of the door for fixing.

As described above, as the composite material according to the present invention, the container constitutes panels, frames, and rails, thereby remarkably reducing the weight of the container itself and effectively preventing corrosion due to seawater. It is possible to further increase the durability life by preventing the accumulation of fatigue with respect to the applied load.

In particular, the refrigeration container according to the present invention, in the case of the side bottom rail connecting the sub-floor panel, the side panel and the frame can fully support the weight of the container itself, thereby preventing deformation or damage caused by vibration during movement and load of the cargo. There is an effect that can be, and the coupling portion of the surface of each panel and the heat insulator is prevented from peeling phenomenon due to heat, load and impact, it is possible to prevent the generation of noise.

In addition, the refrigerating container of the present invention is also made of a material with a relatively low thermal conductivity to increase the refrigeration efficiency, and in case of partial or local breakage, replacement of parts to the part, coating and heat treatment of the resin, etc. As the local repair is made easier, the scope of recycling can be extended to contribute to cost reduction.

Claims (10)

In a refrigerated container consisting of panels, rails, frames, and door assemblies, the panels are sewn into a fiber thread in a state in which a single layer of woven glass fibers are wrapped on both sides of the slice foam, and roving glass fibers on the outer surface thereof. Refrigerating container, characterized in that to form a laminated form of the composite material and the foam by forming a layer repeatedly and cross the fiberglass on the fabric. The freezing container according to claim 1, wherein the roving glass fibers and the woven glass fibers stacked on the outer surface of the slice foam are made of glass fibers intersecting in three or more layers. A refrigerated container comprising panels, rails, frames, and door assemblies, wherein the rails include side top rails, side bottom rails, bolsters, outriggers, and cross members, except for side top rails. Bottom rails, bolsters, outriggers, and cross members are laminated to form a layer by repeating intersecting each of the fiberglass fibers and roving glass fibers wound on the bobbin. A refrigerated container comprising a plurality of layers of carbon fibers on top, and impregnated with a thermosetting resin to form a composite material alone. In a refrigerated container consisting of a panel, a rail, a frame and a door assembly, the frames are arranged so as to cross the fabric glass fibers and the roving glass fibers on the outer surface of the steel repeatedly, and the fabric carbon fibers Laminating and roving carbon fibers to form a core, and the outer side of the glass fibers of the crop and the roving glass fibers are arranged so as to cross each other repeatedly, and then cured to form a laminated material of composite materials and steels Refrigerating container, characterized in that. The freezing container according to claim 1, wherein the door assembly is formed such that the door beam and the door rod beam are integral with the door panel. The freezing container according to claim 3, wherein the woven glass fibers and the woven carbon fibers include a woven fabric and a nonwoven fabric. The freezing container according to claim 3, wherein the side top rail is made of a glass fiber in which the entire composite material is made of a plurality of layers of woven glass fibers and roving glass fibers. 4. The freezing container according to claim 3, wherein the carbon fiber layer laminated in multiple layers on the core portion under load maintains a thickness layer corresponding to 50% of the total composite material. The freezing container according to claim 3, wherein the side bottom rail is formed with an U-shaped insert portion into which a side panel can be fitted. The freezing container according to claim 4, wherein the carbon fiber layer forming the core portion is configured to maintain a thickness layer of 15% or more with respect to the entire composite material.