JPH0891476A - Liquid container - Google Patents

Abstract

PURPOSE: To provide a liquid container light in weight yet high in strength and free from contamination with rust, etc. CONSTITUTION: A liquid container 80 has it outer periphery enclosed with the reinforcing structural member 82 consisting of a reaction injection-molded resin. The reinforcing structural member 82 is at least partially provided with resin- covered core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container, and more particularly to a liquid container which is excellent in mechanical strength and lightweight and which is unlikely to pollute the surroundings by rust or the like.

[0002]

2. Description of the Related Art As a liquid container, for example, a resin blow-molded container or a metal welded container is used so as not to leak liquid.

[0003]

However, a container formed of a material such as resin that does not leak and is easy to form often has insufficient strength, and if a large amount of liquid is injected, it may be caused by a load, or It has a drawback that it is easily damaged by an external shock during transportation.

On the other hand, a container made of a material having excellent strength such as metal is heavy and difficult to use for transportation, and the metal material rusts, and the rust becomes dust or dust. In some specific fields handling foods and beverages, it is sometimes not preferable to use a metal material as a container. In that case, it may be possible to prevent rust by coating the surface of the metal material, but there is a problem that the coated surface peels off and becomes dust and dirt. It took time to repair.

Further, since the container made of a metal material is heavy in weight, it requires a large amount of energy for transportation and is difficult to stack. Although containers are usually transported by trucks, the allowable loading weight of trucks is legally defined, and in order to transport as much liquid as possible, it is desirable to reduce the weight of the container itself. It is rare.

A container in which a vinyl chloride tank is reinforced with a metal plate has also been developed, but since it uses a metal plate as a reinforcement, it has a heavy weight and has the same problem as a container made of a metal material. There is. The present invention has been made in view of such circumstances, has a sufficient strength while being lightweight,
Moreover, it is an object of the present invention to provide a liquid container that is free from contamination such as rust.

[0007]

As a result of intensive research on a liquid container, the inventors of the present invention have found that a resin molded by reaction injection molding can be used as a reinforced structural member having sufficient strength while being lightweight. It has been found that the defects peculiar to metal materials such as rust are eliminated, and the present invention has been completed.

According to the present invention, there is provided a liquid container whose outer periphery is covered with a reinforcing structural member, wherein the reinforcing structural member is made of resin molded by reaction injection molding. It As a preferred embodiment of the present invention, the following liquid container is provided.

(1) The liquid container as described above, wherein at least a part of the reinforcing structural member is a core material coated with a resin. (2) The liquid container according to the above or (1), which has three or more columns that are reinforcing structural members in which a core material is coated with a resin.

(3) The column is a rod-shaped core material coated with resin from the upper end portion to the lower end portion of the liquid container except for the coating layers formed by reaction injection molding on both ends (2). ) The liquid container described. (4) The liquid container according to (2) or (3), in which 50% or more of the total load is supported by the columns.

(5) The liquid container according to (4), wherein 80% or more of the total load is supported by the columns. (6) The liquid container according to (4), wherein 90% or more of the total load is supported by the columns.

(7) The core of the column is 80 ° with respect to the horizontal plane.
The liquid container according to any one of (2) to (6) above. (8) The liquid container according to (7), wherein the core material of the column is 85 ° or more with respect to the horizontal plane.

(9) The core material of the column is 88 ° with respect to the horizontal plane.
The liquid container as described above in (8). (10) The core of the column is perpendicular to the horizontal plane (9)
The described liquid container.

(11) At least a part of the core material is
(A) A resin pipe, (B) A liquid pipe according to any one of (1) to (10), which is made of a metal pipe arranged on the outer periphery of the resin pipe and locked to the resin pipe. container. (12) The liquid container according to (11), in which the outer periphery of the core material is covered with resin so as to be fused with a part of the resin pipe to shield the metal pipe from the outside air and not to block the through hole of the resin pipe.

(13) The above, or (1) to (12), wherein a part of the integrally formed reinforcing structural member serves as a tank.
The liquid container described in any one of 1. (14) The liquid container according to any one of the above or (1) to (12), wherein a separately molded tank is housed in the integrally formed reinforcing structure member.

(15) The liquid container according to any one of the above or (1) to (12), wherein a part of the reinforcing structure member obtained by assembling the reinforcing structure member is a tank. (16) In the reinforced structural member assembled from the reinforced structural member,
The above or (1)-
The liquid container according to any one of (12).

(17) The resin molded by reaction injection molding is a norbornene resin, or (1)
The liquid container according to any one of to (16). (Core Material) In the present invention, it is preferable to use a core material for manufacturing the reinforcing structural member. The core material is preferably made of a metal such as iron or an iron alloy from the viewpoint of strength, and particularly preferably has a hollow structure inside from the viewpoint of light weight. Specific examples of the core material that has both strength and lightness include a corrugated metal plate having a rib structure and a metal pipe with both ends sealed.

(Composite core material) In particular, in order to allow the claw portion of a forklift to pass therethrough or to facilitate fixing to a pallet with a rope or the like, when the container of the present invention has a through hole, the following composite core material is used. You can use it.

An example of the composite core material is a composite core material 1 having a structure shown in FIG. 1 and composed of a resin pipe 2 and a metal pipe 4. The resin pipe 2 constituting the composite core material 1 is made of a resin having a good fusion property with the resin coating the composite core material. For example, in the case of coating with a norbornene-based resin by reaction injection molding, polyethylene is used. In addition to polyolefin resins such as polypropylene, resins formed of resins such as polystyrene and ethylene-vinyl acetate copolymer can be used.

The metal pipe 4 constituting the composite core material 1 used in the present invention is not particularly limited, and for example, iron-carbon steel,
Examples include iron and its alloys such as manganese steel, chrome steel, stainless steel and cast iron; copper and copper alloys; aluminum, nickel, lead, titanium and their alloys; and the like.

As shown in FIG. 1, the composite core material 1 used in the present invention has a combination structure in which a metal pipe 4 is arranged on the outer periphery of a resin pipe 2 and is locked to the resin pipe 2. It is preferable that a hollow portion 12 sealed from the outside is formed between the outer circumference of the resin pipe 2 and the inner circumference of the metal pipe 4. In this case, blind plates 8 are attached to both ends of the metal pipe 4.
Are joined by welding or the like, and the blind plate 8 may be utilized to engage with the outer periphery of the resin pipe 2. Further, in the gap between the blind plate 8 and the resin pipe 2, a sealing compound,
It is preferable to seal a sealing material such as foam or adhesive tape.

The composite core material 1 has sufficient strength because it has the metal pipe 4, and has light weight because it has the hollow portion 12, and further has the through hole 10 as described above.
Is preferable because it can be used. (Combined Structure of Core Materials) When these core materials are used in combination, for example, they are welded, bundled with a wire, or an adhesive agent is used to fix the core materials to each other as necessary.

(Reaction Injection Molding) In the present invention, the reinforcing structural member is obtained by reaction injection molding. When a core material or a combination structure thereof is used, these are covered with a resin to obtain a reinforced structural member.

The resin is not particularly limited as long as it is a resin obtained by reaction injection molding, and examples thereof include norbornene resins, urethane resins, urea resins and the like.
Among these, norbornene-based resins are preferable, and norbornene-based resins to which an elastomer is added are particularly preferable.

The norbornene-based monomer used to obtain the norbornene-based resin is dicyclopentadiene,
It is a cycloolefin having a norbornene ring such as dihydrodicyclopentadiene, tetracyclododecene, and tricyclopentadiene. A metathesis catalyst and an activator are used for bulk polymerization of these monomers by reaction injection molding.

The metathesis catalyst used in the present invention is a metathesis catalyst known as a catalyst for bulk polymerization of norbornene-based monomers such as ammonium salts of organic molybdates such as tungsten hexachloride, tridodecyl ammonium molybdate and tri (tridecyl) ammonium molybdate. There is no particular limitation as long as it is an organic molybdic acid ammonium salt.

The amount of the metathesis catalyst used is usually 0.01 mmol or more and 50 mmol or less with respect to 1 mol of the monomer used. If the amount of metathesis catalyst used is too small, the polymerization activity will be too low and production efficiency will be poor.If the amount used is too large, the reaction will be too violent and the catalyst will be prone to precipitate, making it difficult to store the reaction stock solution homogeneously. become. The metathesis catalyst is usually used by dissolving it in a monomer.

Examples of the activator used in the present invention include alkyl aluminum halides such as ethyl aluminum dichloride and diethyl aluminum chloride, alkoxyalkyl aluminum halides thereof, and organic tin compounds. The amount of activator used is not particularly limited, but is usually 1 to 10 mol per 1 mol of the metathesis catalyst used. If the amount of activator used is too small, the production efficiency will be poor, and if the amount used is too large, the reaction will be too violent. The activator is also used by dissolving it in the monomer.

In order to modify the norbornene resin with an elastomer, bulk polymerization may be performed in the presence of the elastomer. Examples of the elastomer used for modification include polybutadiene, styrene-butadiene copolymer (SBR), styrene-butadiene-styrene block copolymer (SBS), polyisoprene, styrene-isopre-styrene block copolymer (SIS). ), Ethylene-propylene-diene terpolymer (EPT) and the like.

The blending ratio of the elastomer is 1 to 20 parts by weight with respect to 100 parts by weight of the norbornene-based monomer. When the blending ratio of the elastomer is low, the flexibility decreases. On the contrary, if the blending ratio of the elastomer is too large, the glass transition temperature is lowered and the strength is lowered.

As a pre-preparation for reaction injection molding, a reaction injection molding material containing a norbornene-based monomer, a metathesis catalyst and an activator as main materials is a liquid containing a norbornene-based monomer and a metathesis catalyst, a norbornene-based monomer and an activator. Separately into two stable liquids, and place in another container. The two liquids are mixed and injected into a mold to perform bulk polymerization.

The mold used for the reaction injection molding is not limited to the metal mold, but a resin mold or a simple mold can be used. It is preferable that the mold is sealed with an inert gas, and the components used for the polymerization reaction are stored and operated in an atmosphere of an inert gas such as nitrogen gas.

The mold temperature is preferably 10 to 150.
C., more preferably 30 to 120.degree. If the mold temperature is too low, the efficiency is poor, and if it is too high, the resin may be carbonized. Mold pressure is usually 0.1-100 kg / cm
^It is usually done in the range of ² . The polymerization end time can be appropriately selected by adjusting the type and concentration of each component of the reaction stock solution, and can be appropriately selected.
30 seconds to 20 minutes. If a reaction solution having a polymerization termination time that is too short is used, the reaction solution is not filled in every corner of the mold, resulting in poor moldability. If a reaction solution that is too long is used, time efficiency is poor.

When the core material is used in the present invention, the core material can be fixed in the mold during the reaction injection molding, and the periphery of the reinforcing structural member can be covered with resin. In particular,
When using a core material made of metal or having a metal part, in order to prevent contamination of the surroundings by rust etc., the whole surface of the metal part is made of resin by reaction injection molding so that the metal part is not exposed on the surface. Is preferably coated.

(Tank) The material of the tank used in the present invention is not particularly limited. For example, a material that does not easily leak liquid, for example, a resin formed of polyethylene, vinyl chloride, or the like or glass, a material formed of a reinforcing structural member, or the like is exemplified. Among these, those in which the reinforcing structure member is integrally molded by the reaction injection molding method, and is itself a reinforcing structure part, and a part of the reinforcing structure member can be used as a tank (tank integrated body described later). -The structure of the liquid container that can be obtained as an integrally molded type is simple and easy to manufacture, which is preferable. Also, in the case of a prefabricated tank that is fixed as an insert in the mold and integrally molded with the reinforcing structure member (tank storage / integral molding type described below), it is In the case of coating with a resin having good fusion properties, for example, a nobornene resin by reaction injection molding, in addition to polyolefin resins such as polyethylene and polypropylene,
A tank formed of polystyrene, ethylene-vinyl acetate copolymer or the like is preferable.

Although the shape of the tank is not particularly limited, the tank is excellent in strength, the storage efficiency of the liquid container itself is excellent, and when the reinforcing structural member itself is not the tank, the tank portion can be easily stored in the reinforcing structural member, A columnar body such as a cylinder or a rectangular parallelepiped, particularly a rectangular parallelepiped is preferable, because the space of the tank storage portion can be effectively used.

This tank has a liquid inlet and a liquid outlet, and usually has an air hole for facilitating the injection and the outflow. It is preferable that the inlet and the air hole are provided on the upper surface of the tank to prevent liquid leakage from occurring. It is preferable that the outlet is located on the lower part of the side surface, and that the bottom of the tank is inclined so that the stored liquid can efficiently flow out to the end without using a pump or the like. Generally, the inlet, outlet, air hole, etc. of the tank are provided at the time of molding the tank, but they may be provided after the molding, or may be provided after being covered with the reinforcing structural member. Good.

In general, the inlet may be a simple mouth with a lid. The air holes need only be able to adjust the internal air pressure, and are usually a mechanism having a check valve, and air is allowed to flow in only from the outside to the inside, which enables efficient outflow of the liquid. On the other hand, the outlet has a mechanism such as a faucet and a valve, and is usually structured so that the outlet can be opened and closed and the outflow amount can be adjusted. Further, it is general that the liquid injection, the outflow, and the air inflow can be adjusted from the outside of the reinforcing structure member.

(Reinforcement Structure Member) In the present invention, the liquid container has a structure in which the tank and the reinforcement structure member are integrated, that is, the tank itself is composed of the reinforcement structure member (hereinafter, referred to as tank 1). Body type) and a structure in which the tank is housed in the reinforcing structure member, that is, a tank manufactured separately from the reinforcing structure member and the tank is housed in the reinforcing structure member (hereinafter referred to as tank storage type). There is.

When the tank is a rectangular parallelepiped, for example, the reinforcing structural member has a total of 5 side surfaces and a bottom surface of the rectangular parallelepiped.
It is composed of a sheet-like reinforcing structure member and a rod-like reinforcing structure member which is a support for these members and which is at least four corners of the bottom surface, that is, four columns located at boundaries between side surfaces. The upper part may not have a reinforcing structure, but another plate-like reinforcing structural member on the upper surface, or a reinforcing material other than the reinforcing structural member of the present invention, for example, a resin or a metal coated with a resin. And the like. The four sides of the bottom surface and the upper surface may be further reinforced by using a rod-shaped reinforcing structure member. The plate-shaped reinforcing structural member is usually a flat plate, but in the case of a tank-accommodating reinforcing structural member, it may be in a lattice shape or the like.
Further, the reinforcing structural member, which is a column, has a core material, and may be present in addition to the four located at the four corners of the bottom surface.

The method of constructing a reinforcing structural member using these reinforcing structural members is not particularly limited. It may be integrally molded by reaction injection molding (hereinafter referred to as an integral mold) or may be assembled by separately fixing reinforcing structural members to each other (hereinafter referred to as an assembled mold).

The integral molding die is one in which the reinforcing structural member is integrally molded. For tank storage / integral molding type,
The tank and the core material of the column are fixed in the mold, reaction injection molding is performed, and the outer periphery of the tank and the core material are covered with resin to obtain a reinforced structural member. In the case of the tank integrated / integral molding die, after fixing the core material and the core that can be taken out after molding in the part that will be the tank in the mold, after performing reaction injection molding and coating the core material Then, the core is taken out to obtain a reinforcing structural member. Further, the lid member having the injection port formed is separately formed by reaction injection molding or the like. In any case, a liquid container is constructed by attaching a cap to the inlet of the tank of the obtained reinforcing structural member, a valve to the air hole, and a faucet or valve to the outlet. From the viewpoints of simple structure and easy manufacturing, a liquid container made of an integrally-molded reinforcing structure member is preferable, and a liquid container made of a tank-integral-molded reinforcing structure member is particularly preferable.

In the case of the assembly type, the method of fixing the reinforcing structural members to each other is not particularly limited, and for example, there is a method of making holes for bolts and fixing them to the frame using bolts and nuts. In the tank-integrated / assembled type, there may be a case where only the part forming the tank is integrally formed, and a part forming the tank is also formed by assembling the reinforcing structural material. In the latter case, there is a gap just by assembling the reinforcing structural member,
The liquid usually leaks, and in order to avoid it, it is common to work to fill the gap. The method of filling the gap is not particularly limited. For example, when assembling, a packing such as a rubber material is sandwiched between the reinforcing structural members to eliminate the gap, or after assembling, a high-viscosity solution having a viscosity such as Teflon resin or thermoplastic norbornene resin is applied inside. There are methods such as preventing gaps and sufficiently removing the solvent. Also in this case, a liquid container is constructed by attaching a cap to the inlet of the tank of the obtained reinforcing structure member, a valve to the air hole, and a faucet or valve to the outlet.

In the case of the tank storage / assembly type, a tank manufactured separately is stored in the reinforcing structure member obtained by assembling the reinforcing structure member. The storage part has a shape and size according to the shape and size of the tank so that the tank does not vibrate in the tank storage part of the reinforced structural member and is not damaged by an external impact. It is preferable that the side surfaces and the bottom surface of the portion are in contact with each other or that only a very narrow gap is opened. Also, the inside of the storage part absorbs external shocks,
It may have a damping structure for suppressing movement and vibration of the tank, for example, a layer made of a resin foam or an elastic body. For example,
When the reinforcing structural member is made of norbornene-based resin, the damping structure is molded as a layer of a foamed resin that has excellent fusion-bonding properties with the norbornene-based resin such as polyethylene, and the damping structure is molded with a mold when molding the reinforcing structural member. It is also possible to fix it inside and integrally form the reinforcing structure member and the damping structure. In addition, in the case of tank storage type / assembly type, inlet, air hole,
Portions such as the outlet may not be covered by the reinforcing structural member depending on the necessity of operation. (Liquid Container) The liquid container of the present invention is a liquid container whose outer periphery is covered with a reinforcing structural member made of a resin molded by reaction injection molding. If necessary,
The outer peripheral surface may be painted, but it is preferable not to paint because there is a problem such as dust when the paint peels off.

Generally, in terms of strength, the liquid container is preferably a columnar body such as a cylinder or a rectangular parallelepiped. A rectangular parallelepiped is particularly preferable so that a large amount of liquid can be stored in a limited space during transportation and storage. Further, it is preferable to have three or more columns which are a part of the reinforcing structural member, or leg portions including such columns. Although these struts may simply have thick rod-shaped reinforcing structural members, it is preferable that they are coated with a core material, and these struts and legs should have strength against impact from below. Further, these columns provide strength against impact from the side. The support column is not necessarily a rod-shaped reinforcing structural member,
It may be integrated with other reinforcing structural members. In the case of a pillar covered with a core material, a part of the planar reinforcing structure member spreading in the vertical direction may be a pillar. From the upper end to the lower end of the liquid container, except for the coating layers formed by reaction injection molding on both ends, if substantially reinforced with one rod-shaped core material, the rod-shaped part around the core material is a pillar. And at least part of the load of the liquid container is supported by the stanchions, the core material being substantially covered. In particular, in the case of having a pillar reinforced by a core material, it is preferable that half or more, preferably 80% or more, and more preferably 90% or more of the total load is supported by the pillar. Further, it is preferable that the core material is erected substantially perpendicular to the horizontal plane. This is because it is easy to support the load and is less likely to be damaged as a whole.

[0046]

The liquid container according to the present invention is reinforced with a resin obtained by the reaction injection molding method.
Since it has sufficient mechanical strength and impact resistance, it is unlikely to be cracked or cracked by external force such as load,
It is even lighter. In a preferred embodiment, an external force such as a load can be received by the core material, so that the core material has sufficient mechanical strength to withstand the intended use. In particular, when a metal member is used as the core material, a metal pipe having excellent mechanical strength and a relatively light weight can be obtained by using as the core material a metal pipe having a hollow portion in its internal structure.

As a part of the reinforcing structural member, three or more support columns having sufficient strength by coating a core material,
Or if you have legs that include such columns, you can stack the liquid containers even if they are full of liquid by stacking them so that the columns overlap.
It is possible to stack three or more stages, more preferably four or more stages.

Even when the metal member is used as the core material, the metal member is not exposed to the outside. Therefore, there is no possibility that the metal member rusts and causes dust or dirt.

[0049]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid container of the present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 (A) is a longitudinal sectional view of a composite core material composed of a resin pipe and a metal pipe used in a liquid container according to an embodiment of the present invention, and FIG. 1 (B).
Is a sectional view taken along the line BB in FIG. 2A, and FIG. 2 is a perspective view of a liquid container according to still another embodiment of the present invention.
3 is a perspective view of a liquid container according to still another embodiment of the present invention, and FIG. 4 is a partial cross-sectional exploded side view of the container shown in FIG.

First, the reinforcing structure member 1a shown in FIG. 1 will be described. As shown in FIGS. 1A and 1B, the reinforcing structural member 1 used in the liquid container of this embodiment has a rod shape as a whole, and is a composite core material composed of a resin pipe 2 and a metal pipe 4. 5 is used as a core material and covered with a coating layer 6.

The polyethylene resin pipe 2 has a through hole 10 inside the composite core material 5. The cross-sectional shape of the resin pipe 2 is rectangular in this embodiment, but is not particularly limited. The length and wall thickness of the resin pipe 2 are the same as those of the reinforcing structural member 1.
Can be freely designed according to the size of the liquid container used, the required strength, and the like.

A metal pipe 4 made of iron is arranged on the outer periphery of the resin pipe 2. The metal pipe 4 has an inner circumference larger than the outer circumference of the resin pipe 2 and a length shorter than the resin pipe 2. The wall thickness of the metal pipe 4 can be freely designed according to the application in which the reinforcing structural member 1 is used. The cross-sectional shape of this metal pipe is rectangular in this embodiment, but is not particularly limited. A predetermined hollow portion 12 is formed between the resin pipe 2 and the outer periphery thereof.

At both ends of the metal pipe 4, a blind plate 8 made of iron is provided.
Are joined together. This joining is performed by welding. Blind plate 8
The inner end of the is locked to the outer periphery of the resin pipe 2 near both ends of the resin pipe 2. When molding the coating layer 6 by reaction injection molding, in order to prevent the molding resin from flowing into the hollow portion 12 side from the gap between the inner end of the blind plate 8 and the outer periphery of the resin pipe 2, these gaps are It is sealed in advance using silicone rubber as a sealing material.

The coating layer 6 is composed of a norbornene resin obtained by a reaction injection molding method. At the time of reaction injection molding, so-called insert molding is performed in which the composite core material 5 as the core material is placed in the mold and then the reaction stock solution is injected. In this reaction injection molding, the coating layer 6 obtained by the reaction injection molding covers the outer circumferences of the metal pipe 4 and the resin pipe 2 and is fused with both ends of the resin pipe 2, and the metal pipe 4 is shielded from the outside air. And so that the through hole 10 of the resin pipe 2 is not blocked. A hollow portion 12 is formed between the resin pipe 2 and the metal pipe 4.

The layer thickness of the coating layer 6 can be freely designed according to the size of the liquid container, the required strength and the like. The cross-sectional shape of the coating layer 6 is rectangular in this embodiment, but is not particularly limited, and may be circular, elliptical, polygonal,
It can be freely changed according to other uses.

The norbornene-based resin forming the coating layer 6 is composed of a ring-opening polymer of an elastomer-modified norbornene-based monomer having three or more ring members, and the heat distortion temperature of the polymer is 100 ° C. or more. Elongation at break 10-100
% Is preferable. Since the metal pipe 4 can receive an external force such as a load, the reinforced structural member 1 has sufficient mechanical strength to withstand the intended use. Further, the coating layer 6 formed on the outer periphery of the metal pipe 4 is composed of a norbornene-based resin obtained by a reaction injection molding method, and the norbornene-based resin has sufficient mechanical strength and impact resistance. Therefore, cracks or cracks do not occur against external force such as load. Furthermore, with the metal pipe 4,
By combining with the norbornene-based resin coating layer 6, mechanical strength is improved as compared with a metal pipe alone. Moreover, since the hollow portion 12 sealed from the outside is formed, the weight can be further reduced.

In the reinforced structural member 1, the outer periphery and the end of the metal pipe 4 are covered with the coating layer 6, and the inner periphery of the metal pipe 4 is
Since it is covered with the resin pipe 2 through the hollow portion 12, the metal pipe 4 is not exposed to the outside. Therefore,
The metal pipe 4 is hard to rust, and even if it rusts, it does not cause dust or dust.

Further, as the resin pipe 2, by using a resin pipe having a good fusion property with the norbornene resin,
When the coating layer 6 is molded by the reaction injection molding of norbornene resin, the coating layer 6 is well fused to both ends of the resin pipe 2. The through hole 10 of the resin pipe 2 remains in the reinforcing structural member 1 as it is. When the covered reinforcing structure member 1 is fixed to another member to assemble the reinforcing structure member, it can be fixed by hooking the claws of the fixing tool or the like into the through hole 10, and also the support pillar of the reinforcing structure member. When used as, the position of the reinforcing structure member can be fixed by providing a protrusion on the floor surface on which the reinforcing structure member is installed and installing the protrusion into the through hole 10. It can be used for multiple purposes.

A part of the outer circumference of the resin pipe 2 is attached to the metal pipe 4
When the liquid container of the present invention is lifted by passing the claw portion of the forklift through the through hole 10, the load applied to the resin pipe 2 is used so that the load contacts the inner circumference of the liquid pipe. The direct transmission to the metal pipe 4 in contact therewith has an advantage that the load on the resin pipe 2 is lightened.

The reinforcing structural member 1 may be drilled so that it can be fixed to other reinforcing structural members by using bolts and nuts. At that time, it is preferable that the metal pipe remains completely covered. FIG. 2 shows a liquid container 20 which is an embodiment of the present invention.
Indicates. This liquid container is of a tank storage and assembly type.

In the liquid container 20 of this embodiment, the four columns arranged in the square of the vinyl chloride tank 22 and the beams arranged at the four sides of the top and bottom sides are sealed metal pipes as core materials. The reinforcing structure member 1a (corresponding to the reinforcing structure member 1 of FIG. 1) is formed, and the four side surfaces and the bottom surface of the tank 22 are formed of a reinforcing structure member having a core material in which sealing metal pipes are arranged in parallel. ing. These reinforcing structural members 1a,
1c and 1d are assembled using bolts and nuts.

At the center of the upper portion of the tank portion 22, the cap 2
3 has a filling port that can be screwed to the tank part 2
An air hole 26 having a check valve is attached around the upper part of 2 so as not to flow out from the inside to the outside. In addition, an outlet 25 having a faucet mechanism near the bottom of the side surface of the tank portion 22.
Is attached. The reinforcing structural member 1d that reinforces the side surface on which the outlet 25 is located has a notch formed in a portion corresponding to the outlet 25, so that the outlet can be opened and closed and the flow rate can be adjusted from the outside. The liquid can be taken out.

3 and 4 show a liquid container 60 according to another embodiment of the present invention. The liquid container 80 is of a tank-integrally-molded type, and the reinforcing structural member also serves as a tank. The liquid container 80 of this embodiment includes a container-shaped reinforcing structure member 82 and a lid member 84 that closes the upper opening thereof. The container-shaped reinforcing structure member 82 is shown in FIG.
The core material 5 and the sealed metal pipe shown in (1) are combined, and a coating layer is formed around these core materials by reaction injection molding. Specifically, the container-shaped reinforcing structural member 82 uses a sealed metal pipe, which is arranged as twelve columns on the outer periphery, and the two composite members shown in FIG. It is manufactured by arranging the core material 5 on the bottom surface side, fixing these with a wire or the like, fixing them in a mold, performing reaction injection molding, and forming a coating layer.

In this embodiment, at the same time as forming the coating layer covering the core material, as shown in FIG. 4, the side wall 89 (side wall of the tank) and the bottom wall 90 (side of the tank) of the container-like reinforcing structural member 82 are formed. The bottom wall) and the bottom reinforcing rib 91 are formed by reaction injection molding. As shown in FIG. 4, the bottom wall 90 is formed to be inclined so as to have the maximum depth in the substantially central portion, and the outlet 100 is provided at the position of the bottom wall 90 having the maximum depth. The faucet 102 is attached there.

3 and 4, the through hole 10 formed at the bottom of the container 80 is the through hole 10 formed as a result of using the composite core material 5, and the claws of a forklift can be inserted therein. ing. The lid member 84 is separately formed by reaction injection molding so as to be attached to the upper end opening of the container-shaped reinforcing structure member. In the present embodiment, the lid member 84 includes
No core material is used. An injection port is formed in the central portion of the lid member 84, and an air hole 93 (see FIG. 3) is formed separately from the injection port. The air hole 93 may be provided with a check valve for preventing inflow from the inside to the outside.
Further, the lid member 84 is formed with a drain groove portion 94 so that the spilled substance does not collect and easily flows when the liquid is injected. The lid member 84 is fixed to the opening of the container-shaped reinforcing member 82 by adhesion or other means.

A cap 96 is openably and closably attached to the inlet of the lid member 84. The cap 96 is formed by reaction injection molding separately from the lid member 84. Cap 96
Is attached to the lid member 84 via a shaft 97 (see FIG. 3) attached to the protrusion of the lid member 84, and is rotatable about the shaft 97.

Further, in the container 80 of this embodiment, as shown in FIG.
As shown in FIG. 3, a pair of recesses 98 are formed in the bottom of the container 80 separately from the through holes 10 so as to be substantially orthogonal to these. The recess 98 is formed by the shape of the inner surface of the mold at the time of reaction injection molding, and a claw portion of a forklift or the like can be inserted therein. A plate member 99 separately molded is attached to the bottom of the recess 98.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention. Next, the present invention will be described based on a more specific embodiment. Example 1 Dicyclopentadiene (DCP) 85 under nitrogen atmosphere
15 parts by weight of an asymmetric cyclopentadiene trimer were mixed, and 5 parts by weight of a styrene-isoprene-styrene block copolymer (Kreton 1170, manufactured by Shell Co.) was mixed.
2 parts by weight of Irganox 1010 (manufactured by Ciba Geigy), which is a phenolic antioxidant, and 2 parts by weight of the solution are divided into two containers, one of which is 40 parts of diethylaluminum chloride (DEAC) with respect to the monomer. A millimolar concentration, n-propanol were added at a concentration of 44 millimolar, and silicon tetrachloride was added at a concentration of 20 millimolar (solution A). On the other hand, tri (tridecyl) ammonium molybdate was added to the monomer so as to have a concentration of 10 mmol (Liquid B).

Liquids A and B were respectively sent to a power mixer by a gear pump so as to have a volume ratio of 1: 1. Then, the assembled core material was fixed in a mold, and the mold temperature was adjusted. 70 ° C. and injection pressure 2.0 kg / cm ²
The following injection was performed, and the reaction was performed in the mold for 3 minutes to manufacture the container-shaped structural member 82 of the liquid container 80 shown in FIG.
Further, the lid member 84 and the cap 96 of the container 80 shown in FIG. 3 were molded by reaction injection molding in the same manner except that the core material was not used and the shape of the cavity of the mold was changed.

The height of this liquid container 80 is 1400.
mm, width 1100 mm, depth 1100 mm, volume about 1000 liters, weight 130 kg. Prepare four of these liquid containers 80 and put water 10 in each.
00 liters of each were placed and stacked in four stages, but no damage due to load was observed.

[0071]

In the liquid container of the present invention, an external force such as a load can be received by a resin-made reinforcing structural member formed by reaction injection molding, and such resin has mechanical strength and impact resistance. Therefore, the container of the present invention has sufficient mechanical strength to withstand the intended use. Further, the container of the present invention can be made lighter than a container having a reinforcing structural member made of only metal, and problems such as contamination due to rust do not occur. Further, since the container of the present invention has the columns composed of the core material that supports most of the loads, the columns for liquid can be stacked and transported and stored if the columns are overlapped with each other.

[Brief description of drawings]

FIG. 1 (A) is a vertical cross-sectional view of a composite core material composed of a resin pipe and a metal pipe used in a liquid container according to an embodiment of the present invention, and FIG. 1 (B) is a sectional view of FIG. It is sectional drawing which follows the BB line.

FIG. 2 is a perspective view of a liquid container according to an embodiment of the present invention.

FIG. 3 is a perspective view of a liquid container according to another embodiment of the present invention.

4 is a partial cross-sectional exploded side view of the container shown in FIG.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d …… Reinforcing structural member 2 …………………… Resin pipe 4 …… Metal pipe 5 ……………… Composite core material 6 …… Covering layer 8 …… Blind plate 10 ………… Through hole 12 …… Hollow part 20,80 …… Liquid container 22 ………………………… Tank 23,96… Cap 82 ……………… Container-like reinforcing member 84 ……………… Lid member

Claims (4)

[Claims] 1. A liquid container having an outer periphery covered with a reinforcing structure member, wherein the reinforcing structure member is made of resin molded by reaction injection molding. 2. The liquid container according to claim 1, wherein at least a part of the reinforcing structural member is obtained by coating a core material with a resin. 3. The liquid container according to claim 1, which has three or more columns, which are reinforcing structural members in which a core material is coated with a resin. 4. The liquid container according to claim 1, wherein the resin molded by reaction injection molding is a norbornene-based resin.