JP4921232B2 - Insulated container and manufacturing method thereof - Google Patents

Description

  The present invention relates to a heat insulating container and a method for manufacturing the same.

  Conventionally, as a heat insulating container, it consists of an inner container and an outer container, and the internal space formed between the two is evacuated so that a heat insulating material is interposed between both end portions of the inner container and the outer container. Is known (see, for example, Patent Document 1).

Japanese Patent No. 3885566

  However, the conventional heat insulating container is merely provided with a heat insulating material so that the inner container and the outer container are not in direct contact with each other. For this reason, there is a problem that the heat insulating property is inferior compared to other reduced pressure spaces in the portion where the heat insulating material is in contact, even though the inner space is decompressed to enhance the heat insulating property. On the other hand, in order to increase the heat insulating property of the heat insulating material, it is necessary to increase the thickness, but there is a problem that the size increases in the radial direction of the body portion.

  In addition, when the conventional heat insulating container is used in an environment that is easily affected by vibration, the inner container and the outer container may be brought into contact with each other at the body portion to generate a sound, or may be deformed and contacted in some cases. . For this reason, the arrangement | positioning position of a heat insulating material is restrict | limited and either of the said problems is inevitable.

  Then, this invention makes it a subject to provide the heat insulation container which can suppress enlargement, and was excellent in vibration resistance, and its manufacturing method, maintaining desired heat insulation performance.

As a means for solving the above problems, the present invention provides:
An inner space formed between the inner container and the outer container, which is composed of a cylindrical inner container and an outer container, and at least one end side is joined with a mouth portion that communicates the inside of the inner container and the outside of the outer container. Is an insulated container formed by decompressing
A heat insulating material is accommodated in at least the other end side of the internal space,
At least one of an inner container and an outer container formed by deforming at least one of the inner space and the inner container; With a mouth part joined to the outer container, a support structure that supports the outer container so as not to directly contact other than the mouth part is configured ,
Of the inner container or the outer container, at least one of the one end side or the other end side is provided with a misregistration prevention unit configured by a plurality of annular ribs arranged on a concentric circle,
The misalignment prevention unit is configured to maintain the non-contact state with the body portion of the outer container by preventing the misalignment by deforming by reducing the internal space and contacting the heat insulating material. is there.

  With this configuration, no heat insulating material is interposed between the inner container and the outer container, and only the decompressed internal space is provided. Therefore, a desired heat insulation performance can be obtained without increasing the size of the body portion in the outer surface direction. Moreover, a heat insulating material is arrange | positioned at either one edge part or both ends of an inner container and an outer container, and the desired heat insulation performance can be acquired as a whole only by enlarging the thickness to these directions. Furthermore, since the occupied area of both end portions is usually smaller than that of the body portion, it is possible to suppress the amount of heat insulating material and the expansion range as a whole. And the deformation | transformation of the trunk | drum by vibration can be prevented by the support structure between the junction part of a clamping part and an opening | mouth part.

  At least one of the inner container and the outer container is provided with a space capable of accommodating a heat insulating material before being compressed by decompression at least one of the one end side and the other end side, and is deformed by decompression. Preferably, the heat insulating material is compressed to include a deforming portion that forms the clamping portion.

  With this configuration, the heat insulating material can be accommodated with high work efficiency, and the desired function as the support structure can be exhibited in the holding portion obtained after decompression.

  It is preferable to arrange the heat insulating materials at both ends of an internal space formed by the inner container and the outer container.

  With this configuration, the support structure of the inner container by the outer container can be further strengthened, and the contact between the inner container and the outer container at the trunk portion can be reliably prevented.

  It is preferable that the outer container has a cylindrical shape, and a plurality of annular ribs are arranged in parallel from one end side to the other end side.

  With this configuration, when the inner space is decompressed, the plurality of annular ribs can be prevented from being deformed toward the inner container, and can be easily deformed toward one end or the other end during decompression.

Further, the present invention provides a means for solving the above-described problems,
A cylindrical inner container and an outer container, at least one end of the mouth portion is joined to each other, a method for producing a heat-insulating container that depressurizes the formed internal space,
An assembly step of assembling in a state in which a heat insulating material is accommodated in at least the other end side of the internal space formed between the inner container and the outer container;
A depressurizing step for depressurizing the internal space;
Including
In the decompression step, of the inner container or the outer container, on at least one, form a displacement prevention portion which is composed of a plurality of annular ribs arranged concentrically, Ru deforming the displacement prevention portion it allows to prevent displacement Nde write sandwiched insulation between the part of the other of the outer container or the inner container remains, the該挟lifting unit, between the mouth portion, in the outer container, except the mouth portion It supports so as not to contact directly.

  According to the present invention, a space between the inner container and the outer container can be a reduced pressure space, and the dimension in the outer surface direction is not increased. In addition, since a strong support structure can be obtained with at least the mouth portion and the sandwiching portion, even when used in an environment where vibration is likely to act, the body portions come into contact with each other to generate sound or deform. The contact state is not maintained. In addition, it is usually possible to obtain a desired heat insulating performance only by increasing the thickness of the heat insulating material at the end portion having a smaller occupied area than the body portion, and the overall size is not increased.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings.

(First embodiment)
FIG. 1 shows a heat insulating container according to the first embodiment. This heat insulating container is composed of an inner container 1, an outer container 2, and a heat insulating material 3.

  The inner container 1 is made of stainless steel, and has a cylindrical inner body portion 4, a center hole 5 a formed therein, a first inner end portion 5 that closes one end side of the inner body portion 4, and the inner body portion 4. It is comprised by the 2nd inner end part 6 which closes an end side. A mouth portion 7 made of a cylindrical body is integrated into the center hole 5a by welding. On the outer peripheral edges of the first inner end portion 5 and the second inner end portion 6, welded portions 5A and 6A are formed by burring, respectively. The inner body portion 4, the first inner end portion 5 and the second inner end portion 6 are joined and integrated by welding the welded portions 5 </ b> A and 6 </ b> A of the respective end portions to the opening inner edge of the inner body portion 4. . As a result, the first concave portion 8 having a donut shape in plan view is formed on one end side of the inner container 1, and the second concave portion 9 having a circular shape in plan view is formed on the other end side.

  The outer container 2 has the same configuration as the inner container 1 and is made of stainless steel. The outer container 2 is formed with a cylindrical outer body portion 10 and a center hole 11a, and closes one end side of the outer body portion 10. It is comprised by the edge part 11 and the 2nd outer end part 12 which closes the other end side of the outer trunk | drum 10. A plurality of annular ribs 10 a are formed on the outer peripheral surface of the outer body portion 10 so as to have a cross-sectional waveform in the axial direction. The periphery of the central hole 11a of the first outer end portion 11 is a substantially conical protruding portion 11b that gradually protrudes toward the center side. Welded portions 11A and 12A are formed on the outer peripheral edges of the first outer end portion 11 and the second outer end portion 12 by burring, respectively, and are integrally joined to the inner edges of both ends of the outer body portion 10 by welding. .

  The heat insulating material 3 is made of glass wool, and has a donut-shaped first heat insulating portion 13 disposed in an internal space on one end side of the heat insulating container, that is, an internal space on the side where the mouth portion 7 is formed, and an internal space on the other end side. It is comprised with the disk-shaped 2nd heat insulation part 14 arrange | positioned. The first heat insulating portion 13 is disposed in the first concave portion 8 of the inner container 1, and the second heat insulating portion 14 of the inner container 1 is disposed in the second concave portion 9.

  Then, the assembly method of the said heat insulation container is demonstrated.

  First, the two ends of the inner body 4 are closed at the first inner end 5 and the second inner end 6, respectively, and the mouth portion 7 is joined to the center hole 5 a of the first inner end 5. A vessel 1 is formed. On the other hand, one end opening of the outer body 10 is closed by the first outer end 11.

  And the 1st heat insulation part 13 is accommodated in the inner space enclosed by the outer trunk | drum 10 and the 1st outer end part 11, and the inner container 1 is accommodated next. The inner container 1 inserts the mouth portion 7 from the center of the first heat insulating portion 13 into the center hole 11a of the first outer end portion 11, and joins the outer peripheral surface of the mouth portion 7 and the inner peripheral surface of the center hole 11a. At this time, the first heat insulating portion 13 is located in the first concave portion 8 formed by the inner body portion 4 and the first inner end portion 5.

  Subsequently, the second elastic portion is accommodated in a region surrounded by the outer body portion 10 and the second inner end portion 6 of the inner container 1. At this time, the second elastic portion is located in the second concave portion 9, and the displacement in the radial direction is prevented in the same manner as the first elastic portion. Thereafter, the remaining one opening of the outer body portion 10 is closed by the second outer end portion 12.

When the entire assembly is completed in this way, the internal space is depressurized through a tip tube (not shown) formed in the outer body portion 10. Here, the pressure is reduced until the degree of vacuum in the internal space becomes 10 ⁻⁵ Torr. When the internal space is decompressed to obtain a decompressed space, the first inner end portion 5 and the second inner end portion 6 are deformed outward, and the first outer end portion 11 and the second outer end portion 12 are deformed inward. However, since the outer body portion 10 is formed with a plurality of annular ribs 10a, it hardly deforms inward. Moreover, although a force acts in the radial direction in the inner body portion 4, it is hardly deformed in the radial direction because it is cylindrical.

  The first elastic portion and the second elastic portion are deformed between the first inner end portion 5 and the first outer end portion 11 and the second inner end portion 6 and the second outer end due to the deformation of each end portion. Clamping portions 15 are formed between both ends, respectively. The first elastic portion and the second elastic portion are positioned in the first concave portion 8 and the second concave portion 9, respectively, and are not displaced toward the outer diameter side. That is, the 1st recessed part and the 2nd recessed part 9 function as a position shift prevention part which prevents that the 1st heat insulation part 13 and the 2nd heat insulation part 14 shift in the radial direction. Therefore, in the formed clamping part 15, the 1st elastic part and the 2nd elastic part, and the outer trunk | drum 10 maintain a non-contact state. Thereby, the decompression space formed in an outer peripheral part can be extended to both end surfaces, and heat insulation is improved. Further, the inner body portion 4 and the outer body portion 10 are firmly positioned by the sandwiching portion 15, and a support structure that is not displaced and brought into contact by vibration or the like is provided.

  Next, the operation of the heat insulating container will be described.

  The outer container 2 is fixed at an installation location (for example, in a vehicle), a pipe is connected to the mouth portion 7, a fluid (mainly liquid) flows into the inside, is maintained in a heat insulating state, and flows out as necessary. And used elsewhere. Then, when vibration or the like acts on the outer container 2 after installation, the vibration or the like is transmitted to the inner container 1 via the clamping unit 15. The clamping part 15 provides the firm clamping state formed between each edge part and the heat insulating material 3 as mentioned above. Therefore, the positional relationship between the inner body portion 4 and the outer body portion 10 does not collapse, and therefore, both always maintain a predetermined gap.

(Second Embodiment)
FIG. 2 shows a heat insulating container according to the second embodiment. This heat insulating container is different from the heat insulating container according to the first embodiment only in the configuration of the second inner end portion 6 and the second outer end portion 12, and the others are the same. A description thereof will be omitted.

  The second inner end portion 6 is formed with a circular concave portion 16 at the center, and a plurality of annular ribs 17 are formed concentrically around the second inner end portion 6 to form a deformed portion having a corrugated cross section. And in the state which closed the one end opening part of the inner trunk | drum 4 before the said pressure reduction, this deformation | transformation part is dented in the substantially truncated cone shape toward the inner side, as shown with the dashed-two dotted line of FIG. Thereby, even if it is a case where the heat insulating material 3 before compression is arrange | positioned, it is closed at the 2nd outer end part 12, and it welds (TIG welding, seam welding, etc.), an extra jig etc. are not required. Can be done easily. That is, it is not necessary to weld the heat insulating material 3 while compressing it by the second outer end portion 12, and workability is good. A circular recess 12 a is formed at the center of the second outer end 12.

  Then, after the closure at the second outer end portion 12, if the internal space is decompressed, the deforming portion is deformed to the internal space side as shown by the solid line in FIG. In this case, since the plurality of annular ribs 17 are corrugated and easily deformed, only the second inner end portion 6 can be deformed without deforming the second outer end portion 12. Thus, in a state where the internal space is decompressed, the contained heat insulating material 3 is compressed by being sandwiched between the deformed second inner end portion 6 and the second outer end portion 12 to form the sandwiching portion 15. . In the sandwiching portion 15, the second heat insulating portion 14 is prevented from being displaced in the radial direction by the deformed portion of the second inner end portion 6 and the concave portion 12 a of the second outer end portion 12. Further, the heat insulating material 3 is also sandwiched between the first inner end portion 5 and the first outer end portion 11 to form a sandwiching portion 15. Therefore, even if it is the heat insulation container which concerns on 2nd Embodiment, even if a vibration etc. act like the heat insulation container which concerns on the said 1st Embodiment, the inner trunk | drum 4 and the outer trunk | drum 10 do not contact. The space between the two members can be reliably maintained in the reduced pressure space.

  In the above embodiment, the inner container 1 and the outer container 2 are cylindrical, but may be a polygonal cylinder such as a triangle or a quadrangle.

  Moreover, in the said embodiment, although glass wool was used for the heat insulating material 3, it can also be comprised with other heat insulation materials, such as urethane, and can also be comprised with the material excellent in heat resistance, such as ceramic wool. is there. The point is that when the heat insulating material 3 is sandwiched between the inner end portion and the outer end portion and the inner space formed by the inner container 1 and the outer container 2 is depressurized by the sandwiching portion 15, the inner space is deformed. It is only necessary to obtain a support structure that can secure a gap between the body portion 4 and the outer body portion 10.

  Moreover, in the said embodiment, although the opening part 7 was provided only in the one end side, as shown in FIG. 3, according to a use, a use place, and use conditions, the opening part 7 should be provided in both ends. It doesn't matter. In this case, since one of the mouth portions 7 can be the inflow side and the other mouth portion 7 can be the outflow side, the inner diameter of each mouth portion 7 can be suppressed.

  Furthermore, in the said embodiment, although the heat insulating material 3 was each accommodated in the both ends, sufficient support strength is achieved by the clamping part 15 obtained after pressure reduction, and the non-internal part of the inner trunk part 4 and the outer trunk part 10 is achieved. As long as the contact state is maintained, only one side may be used.

It is front sectional drawing of the heat insulation container which concerns on 1st Embodiment. It is front sectional drawing of the heat insulation container which concerns on 2nd Embodiment. It is front sectional drawing of the heat insulation container which concerns on other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Inner container 2 ... Outer container 3 ... Heat insulating material 4 ... Inner trunk | drum 5 ... 1st inner end part 5a ... Center hole 5A ... Welding part 6 ... 2nd inner end part 6A ... Welding part 7 ... Mouth part 8 ... 1st DESCRIPTION OF SYMBOLS 1 Recessed part 9 ... 2nd recessed part 10 ... Outer trunk | drum 10a ... Ring rib 11 ... 1st outer end part 11a ... Center hole 12 ... 2nd outer end part 12a ... Recessed part 13 ... 1st heat insulation part 14 ... 2nd heat insulation part 15 ... sandwiching part 16 ... circular recess 17 ... annular rib

Claims (5)

An inner space formed between the inner container and the outer container, which is composed of a cylindrical inner container and an outer container, and at least one end side is joined with a mouth portion that communicates the inside of the inner container and the outside of the outer container. Is an insulated container formed by decompressing
A heat insulating material is accommodated in at least the other end side of the internal space,
At least one of an inner container and an outer container formed by deforming at least one of the inner space and the inner container; With the mouth part joined to the outer container, a support structure that supports the outer container so as not to directly contact other than the mouth part is configured ,
Of the inner container or the outer container, at least one of the one end side or the other end side is provided with a misregistration prevention unit configured by a plurality of annular ribs arranged on a concentric circle,
The position shift prevention part is deformed by decompressing the internal space and contacting the heat insulating material to prevent position shift and maintain a non-contact state with the body part of the outer container. Insulated container.   At least one of the inner container and the outer container is provided with a space capable of accommodating a heat insulating material before being compressed by decompression at least one of the one end side and the other end side, and is deformed by decompression. The heat insulating container according to claim 1, further comprising a deformable portion that compresses the heat insulating material to form the sandwiching portion.   The heat insulating container according to claim 1, wherein the heat insulating material is disposed at both ends of an internal space formed by an inner container and an outer container.   The heat insulation container according to any one of claims 1 to 3, wherein the outer container is cylindrical, and a plurality of annular ribs are arranged in parallel from one end side to the other end side. A cylindrical inner container and an outer container, at least one end of the mouth portion is joined to each other, a method for producing a heat-insulating container that depressurizes the formed internal space,
An assembly step of assembling in a state in which a heat insulating material is accommodated in at least the other end side of the internal space formed between the inner container and the outer container;
A depressurizing step for depressurizing the internal space;
Including
In the decompression step, of the inner container or the outer container, on at least one, form a displacement prevention portion which is composed of a plurality of annular ribs arranged concentrically, Ru deforming the displacement prevention portion it allows to prevent displacement Nde write sandwiched insulation between the part of the other of the outer container or the inner container remains, the該挟lifting unit, between the mouth portion, in the outer container, except the mouth portion A method for producing a heat-insulating container, characterized in that it is supported so that it does not come into direct contact.

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