JP6039255B2 - Vacuum double container portable thermos and method for producing the same - Google Patents

Description

The present invention relates to a portable thermos for a vacuum double container and a method for manufacturing the same.

  Conventionally, as a portable thermos, a substantially bottomed cylindrical metal inner container and an outer container are arranged with an open space, and the mouth part of the inner container and the mouth part of the outer container are fitted, A vacuum double container is known in which the tip of the mouth and the tip of the mouth of the outer container are fixed by welding. In this vacuum double container, vacuum suction is applied to the space between the inner container and the outer container to exhaust, and a vacuum heat insulating layer is provided between the inner container and the outer container (see Patent Documents 1 to 4). .

  Also, there is a type in which a resin inner plug member, which is a separate member, is attached to the mouth portion of the vacuum double container, and a drinking port is provided on the inner plug member (see Patent Document 4).

JP 59-103633 A JP 2000-333848 A JP 2011-206408 A JP 2003-212258 A

  By the way, the vacuum double container of the portable thermos bottle has the mouth tip of the inner container and the mouth tip of the outer container being welded and welded. Is where the drinker hits. For this reason, depending on the person who drinks at this worship weld, there is a possibility that a feeling of edge will be felt and good drinking comfort may not be obtained. Further, it is not preferable from the viewpoint of safety that the welded portion is located at the place where the person's mouth hits.

  In addition, in the case of a type in which a resin inner stopper member is provided in the container mouth portion as in the container of Patent Document 4, the resin inner stopper member hits the mouth of the person who drinks. Although it is possible to obtain comfort, the installation of a separate plug member increases the complexity of the container structure, the manufacturing process, increases the manufacturing cost, increases the number of parts by adding another member, and the container. Another problem arises: increased weight.

The present invention is proposed in view of the above-mentioned problems, and it is possible to surely obtain a good drinking comfort for a drinker without providing a resin inner plug member or the like separately in the mouth portion. It is possible to improve safety, and further, it is possible to obtain advantages such as simplicity of the structure of the container, high efficiency of the manufacturing process, low manufacturing cost, increase in the number of parts and prevention of increase in the weight of the container. An object of the present invention is to provide a portable thermos for a heavy container and a method for manufacturing the same.

The vacuum double container portable thermos of the present invention is provided with a vacuum heat insulating layer provided between a substantially bottomed cylindrical metal container and a substantially bottomed cylindrical metal outer container. A folded portion bent inward is formed at the tip of the mouth portion, and the folded portion of the outer container and the mouth portion of the inner container are fixed by welding inside the mouth portion of the outer container. Features.
According to this configuration, the folded portion of the outer container and the mouth portion of the inner container are fixed by welding inside the mouth portion of the outer container. Never hit my mouth. Therefore, without providing a resin inner plug member or the like separately in the mouth, the drinker can surely obtain a good drinking comfort, and the safety of the drinker can be further enhanced. Furthermore, since there is no need to provide a resin inner plug member or the like separately at the mouth, the simplicity of the container structure, high efficiency of the manufacturing process, low manufacturing costs, an increase in the number of parts and an increase in the weight of the container The advantage of prevention can be obtained.

The vacuum double container portable thermos of the present invention is such that the enlarged diameter portion is formed near the tip of the mouth portion of the inner container, and the tip of the folded portion of the outer container is substantially in contact with the root of the enlarged diameter portion. The folded portion of the outer container is fitted inside the enlarged diameter portion, and the tip of the folded portion of the outer container is fixed by welding to the inner surface of the mouth portion of the inner container.
According to this configuration, the outer container and the inner container can be easily positioned at an accurate position by fitting the folded portion of the outer container until the tip substantially comes into contact with the inside of the enlarged diameter portion of the inner container. . In addition, the inner surface of the folded portion of the outer container and the inner surface closer to the bottom than the enlarged diameter portion of the inner container can be substantially flush, and the step generated on these inner surfaces can be suppressed and fixed. The smooth fluidity of the beverage that comes out of the container can be ensured.

The vacuum double container portable thermos manufacturing method of the present invention is a vacuum in which a vacuum heat insulating layer is provided between a substantially bottomed cylindrical metal inner container and a substantially bottomed cylindrical metal outer container. A method of manufacturing a double-container portable thermos , the first step of forming a folded portion by bending the tip of a cylindrical body constituting the outer container inward to form a mouth portion constituting the outer container And inserting the inner container or its component inside the mouth of the outer container, and connecting the folded portion of the mouth of the outer container and the mouth of the inner container or its component to the mouth of the outer container And a second step of welding and fixing inside.
According to this configuration, when drinking beverage directly from the container, such as by welding and fixing the folded portion of the mouth of the outer container and the mouth of the inner container inside the mouth of the outer container, You can get a container that won't hit the drinker's mouth. Therefore, it is possible to obtain a container that can surely provide a good drinking comfort for the drinker and can further enhance the safety of the drinker without providing a resin plug member or the like in the mouth. Can do. Furthermore, since there is no need to provide a resin inner plug member or the like separately at the mouth, the simplicity of the container structure, high efficiency of the manufacturing process, low manufacturing costs, an increase in the number of parts and an increase in the weight of the container The advantage of prevention can be obtained.

The method for manufacturing a portable thermos for a vacuum double container according to the present invention is characterized in that, in the second step, the outer container is provided at the base of the enlarged diameter part formed near the tip of the mouth of the inner container or its constituent member. The folded portion of the mouth portion of the outer container is fitted inside the enlarged diameter portion until the tip of the folded portion of the mouth portion substantially contacts, and the tip of the folded portion of the mouth portion of the outer container is connected to the inner container or It is characterized by being welded and fixed to the inner surface of the mouth of the component.
According to this configuration, the mouth portion and the inner container constituting the outer container are accurately connected by fitting the folded portion of the mouth portion of the outer container until the tip substantially contacts the inside of the enlarged diameter portion of the inner container. It can be easily positioned. In addition, the inner surface of the folded portion of the mouth portion of the outer container and the inner surface closer to the bottom than the enlarged diameter portion of the inner container can be substantially flushed, and the step generated on these inner surfaces can be suppressed and fixed. The improvement and ensuring of the smooth fluidity of the beverage that comes out of the container can be achieved.

The method for producing a portable thermos for a vacuum double container according to the present invention is characterized in that the welding is performed by laser welding.
According to this configuration, the outer container or its cylindrical body and the inner container can be welded and fixed precisely with low distortion, and the residual stress of the vacuum double container can be reduced and deformation during welding can be prevented.

In the first method, the manufacturing method of the vacuum double container portable thermos of the present invention forms a basic folded part by bending the tip of the cylindrical body constituting the outer container inward, The folded portion is formed by cutting the vicinity of the tip.
According to this configuration, the base folded portion is once formed, the vicinity of the tip is cut, and the folded portion is formed, whereby a folded portion having a thin and stable diameter can be formed without wrinkles.

  According to the present invention, it is possible to obtain a vacuum double container in which the welded portion does not hit the drinker's mouth when drinking the drink directly from the container, and a resin inner plug member or the like is separately provided in the mouth. At the same time, the drinker can surely obtain a good drinking comfort and can further improve the safety of the drinker. Furthermore, since there is no need to provide a resin inner plug member or the like separately at the mouth, the simplicity of the container structure, high efficiency of the manufacturing process, low manufacturing costs, an increase in the number of parts and an increase in the weight of the container The advantage of prevention can be obtained.

The longitudinal cross-sectional view of the vacuum double container of embodiment by this invention. The elements on larger scale of the A section of FIG. (A)-(f) is sectional explanatory drawing explaining the process of the cylinder opening part which comprises an outer container. (A)-(c) is the elements on larger scale of the B section of FIG. 3, C section, and D section. Explanatory drawing explaining the process which fits the cylindrical opening part which comprises an outer container, and an inner container, and is welded with a laser. The elements on larger scale of the E section of FIG.

[Vacuum Double Container of Embodiment and Manufacturing Method Thereof]
The vacuum double container 1 of the present embodiment is a portable thermos bottle, and as shown in FIG. 1, a substantially bottomed cylindrical metal container 2 and a substantially bottomed cylindrical metal outer container 3 A space is provided between the inner container 2 and the outer container 3, and this space is a vacuum heat insulating layer 4 that is evacuated by vacuum suction.

  As shown in FIGS. 1 and 2, the inner container 2 has a substantially bottomed cylindrical main body 21, and an opening 23 is provided at the end of the main body 21 on the opening side via a constricted portion 22. Yes. A spiral groove 231 into which a lid member (not shown) is screwed is formed in the mouth portion 23, and a diameter-enlarged portion 232 is formed in the vicinity of the tip on the opening side.

  The outer container 3 has a substantially bottomed cylindrical main body 31, and a mouth portion 32 is provided at the end of the main body 31 on the opening side. The main body 31 includes a substantially cylindrical body 311 and a bottom 312 that closes the end of the body 311, and the bottom 312 is evacuated from the space between the inner container 2 and the outer container 3 by vacuum suction. In addition, a suction hole 313 that is used in the process is provided, and a getter 314 that absorbs gas in the space between the inner container 2 and the outer container 3 after the suction hole 313 is sealed is provided on the inner surface side of the bottom 312. It has been.

  A folded portion 321 bent inward is formed at the tip of the mouth portion 32 of the outer container 3. The folded portion 321 is fixed by welding at a position inside the mouth portion 23 of the inner container 2 and the mouth portion 32 of the outer container 3. In this embodiment, the tip of the folded portion 321 is the root of the enlarged diameter portion 232. The tip of the folded portion 321 is fixed to the inner surface of the mouth portion 23 of the inner container 2 by welding by laser welding. By this welding, a welded portion 5 is formed along the circumferential direction at a location where the tip of the folded portion 321 substantially contacts the base of the enlarged diameter portion 232.

  The vacuum heat insulating layer 4 is a vacuum or decompressed space formed between the inner container 2 and the outer container 3. The vacuum heat insulating layer 4 may be provided with a vacuum heat insulating material, for example, by applying a metal foil such as copper or aluminum to the outer surface of the inner container 2 or the inner surface of the outer container 3.

  When manufacturing the vacuum double container 1, the cylindrical body constituting the outer container 3, in this embodiment, the cylindrical body 32 a constituting the mouth portion 32 of the outer container 3 is subjected to necessary processing, and the tip is directed inward. The folded portion 321 is formed by bending, and the mouth portion 32 of the outer container 3 is formed. In the processing on the cylindrical body 32a, for example, as shown in FIGS. 3A to 3C, one end portion of the cylindrical body 32a constituting the mouth portion 32 is flared to form a skirt portion 322. It should be noted that the tip of the skirt 322 is fixed by welding a member constituting the body 311 and the bottom 312 of the outer container 3 or a member constituting the body 311 of the outer container 3 in a later step. Are fixed by welding, and the outer container 3 is formed by welding and fixing a member constituting the bottom 312 to the rear end.

  Further, as shown in FIGS. 3D and 3E and FIGS. 4A and 4B, the other end corresponding to the tip side of the cylindrical body 32a is bent inward to curl. The base folding | returning part 323 bent so that it may curve inside is formed. Thereafter, as shown in FIGS. 3 (f) and 4 (c), by cutting the vicinity of the tip of the base folding portion 323, a folding portion 321 that curves inward is formed, and the mouth portion 32 of the outer container 3 is made to be Form.

  Next, the inner container 2 or its constituent member is inserted inside the mouth part 32 of the outer container 3, and the folded part 321 of the mouth part 32 and the mouth part 23 of the inner container 2 or the mouth part of its constituent member are connected to the outer container 3. The inside of the mouth part 32 is welded and fixed. In the present embodiment, as shown in FIGS. 5 and 6, the inner container 2 or a component thereof is inserted inside the mouth portion 32, and the mouth portion 23 of the inner container 2 or the tip of the mouth of the component member is near the tip. The folded portion 321 of the mouth portion 32 is fitted inside the enlarged diameter portion 232 or the like until the tip of the folded portion 321 of the mouth portion 32 substantially contacts the root of the formed enlarged diameter portion 232 or the like. In FIG. 5, reference numerals 61, 62, and 63 denote jigs for holding the cylindrical body 32a, the inner container 2, or its constituent members.

  Further, in this fitted state, the tip of the folded portion 321 of the mouth portion 32 is fixed to the mouth portion 23 of the inner container 2 or the inner surface of the mouth portion of the constituent member by laser welding. In FIG. 5, reference numeral 71 denotes a laser head of a laser welding machine. A laser beam L is irradiated obliquely to a portion where the tip of the folded portion 321 substantially contacts and its periphery, and a welded portion 5 by laser welding is formed along the circumferential direction (see FIGS. 1 and 2).

  After that, the vacuum double container 1 is formed by performing necessary processes such as welding of the members constituting the body 311 and the bottom 312 of the outer container 3 and vacuum suction / evacuation of the space between the inner container 2 and the outer container 3. Is done.

According to the vacuum double container 1 which is a portable thermos of this embodiment or a method for manufacturing the same, the folded part 321 of the outer container 3 and the mouth part 23 of the inner container 2 are welded inside the mouth part 32 of the outer container 3. Therefore, when drinking a drink directly from the vacuum double container 1, the welded part does not hit the drinker's mouth. Therefore, without providing a resin inner plug member or the like separately in the mouth, the drinker can surely obtain a good drinking comfort, and the safety of the drinker can be further enhanced. Furthermore, since there is no need to provide a resin inner plug member or the like separately at the mouth, the simplicity of the container structure, high efficiency of the manufacturing process, low manufacturing costs, an increase in the number of parts and an increase in the weight of the container The advantage of prevention can be obtained.

  In addition, the outer container 3 and the inner container 2 can be easily positioned at an accurate position by fitting the folded portion 321 of the outer container 3 to the inside of the enlarged-diameter part 232 of the inner container 2 until the tip substantially contacts. Can do. In addition, the inner surface of the folded portion 321 of the outer container 3 and the inner surface closer to the bottom than the enlarged diameter portion 232 of the inner container 2 can be substantially flush, for example, to suppress and fix the level difference generated on these inner surfaces, It is possible to improve the aesthetics and ensure the smooth fluidity of the beverage that comes out of the container.

  Further, by forming the welded part 5 by welding by laser welding, the outer container 3 or its cylinder 32a and the inner container 2 can be welded and fixed precisely with low distortion, and the residual stress of the vacuum double container 1 can be reduced. Reduction and deformation prevention at the time of welding can be aimed at. Further, by forming the base folded portion 323 once and cutting the vicinity of the tip and forming the folded portion 321, the folded portion 321 having a thin and stable diameter can be formed without wrinkles.

[Modifications of Embodiment, etc.]
In addition to the configurations of the inventions and embodiments, the invention disclosed in the present specification is specified by changing these partial configurations to other configurations disclosed in the present specification within the applicable range, or these To which the other configurations disclosed in the present specification are added or specified, or those partial configurations are deleted and specified to the extent that partial effects can be obtained. The following modifications are also included.

  For example, the configurations of the inner container 2 and the outer container 3 are appropriate within the scope of the present invention. For example, the mouth portion 32 and the body portion 311 of the outer container 3 are formed from one plate material. The member constituting the outer container 3 consisting of 32 and the body part 311 and the mouth 23 of the inner container 2 are fitted and welded, or the member constituting a part of the inner container 2 is the mouth 32 of the outer container 3. It is possible to adopt a configuration in which they are fitted and welded to each other, or a combination thereof.

  Further, the present invention includes the folded portion 321 of the outer container 3 and the mouth portion 23 of the inner container 2 by being welded and fixed inside the mouth portion 32 of the outer container 3. An enlarged diameter portion is formed in the vicinity of the distal end of the portion 321, the distal end of the mouth portion 23 of the inner container 2 in which the enlarged diameter portion 232 is not formed is fitted inside the enlarged diameter portion, and the root of the enlarged diameter portion is It is also possible to adopt a configuration in which the welded portion 5 is formed by welding a portion where the tip of the mouth portion 23 of the inner container 2 substantially contacts or its periphery by laser welding.

The present invention can be used for a portable thermos and its manufacture.

DESCRIPTION OF SYMBOLS 1 ... Vacuum double container 2 ... Inner container 21 ... Main body 22 ... Constriction part 23 ... Mouth part 231 ... Spiral groove 232 ... Expanded diameter part 3 ... Outer container 31 ... Main part 311 ... Trunk part 312 ... Bottom part 313 ... Suction hole 314 ... Getter 32 ... Mouth part 32a ... Cylindrical body 321 ... Folded part 322 ... Bottom part 323 ... Basic folded part 4 ... Vacuum heat insulating layer 5 ... Welded parts 61, 62, 63 ... Jig 71 ... Laser head L ... Laser light

Claims (6)

A vacuum heat insulating layer is provided between the substantially bottomed cylindrical metal container and the substantially bottomed cylindrical metal outer container,
A folded portion bent inward is formed at the tip of the mouth of the outer container,
A vacuum double container portable thermos characterized in that the folded part of the outer container and the mouth part of the inner container are fixed by welding inside the mouth part of the outer container. An enlarged diameter portion is formed near the tip of the mouth portion of the inner container,
The folded portion of the outer container is fitted inside the enlarged diameter portion until the tip of the folded portion of the outer container is substantially in contact with the base of the enlarged diameter portion,
The portable thermos according to claim 1, wherein a tip of the folded portion of the outer container is fixed by welding to an inner surface of a mouth portion of the inner container. A method for producing a portable thermos of a vacuum double container in which a vacuum heat insulating layer is provided between a substantially bottomed cylindrical metal inner container and a substantially bottomed cylindrical metal outer container,
A first step of forming a folded portion by bending the tip of the cylindrical body constituting the outer container inward, and forming a mouth portion constituting the outer container;
The inner container or its constituent member is inserted inside the mouth portion of the outer container, and the folded portion of the mouth portion of the outer container and the mouth portion of the inner container or its constituent member are placed inside the mouth portion of the outer container. A second step of welding and fixing with,
The manufacturing method of the portable thermos characterized by providing. In the second step,
The outer container inside the enlarged diameter portion until the tip of the folded portion of the mouth portion of the outer container substantially contacts the base of the enlarged diameter portion formed in the vicinity of the distal end of the mouth portion of the inner container or its constituent member. 4. The folded portion of the mouth portion of the outer container is fitted, and the tip of the folded portion of the mouth portion of the outer container is welded and fixed to the inner surface of the mouth portion of the inner container or its constituent member. Manufacturing method for portable thermos . 5. The method for manufacturing a portable thermos according to claim 3, wherein the welding is performed by laser welding. In the first step,
The bent portion is formed by bending the tip of the cylindrical body constituting the outer container inward to form a base folded portion and cutting the vicinity of the tip of the basic folded portion. 6. A method for producing a portable thermos as set forth in any one of 5 above.

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