JP6116141B2 - Liquid container - Google Patents

Description

  The present invention relates to a configuration of a liquid container such as a stainless bottle provided with a container body having a double wall structure constituted by an inner cylinder and an outer cylinder.

  Such a double-walled liquid container is generally composed of a container body, a drinking mouth provided at the upper end opening of the container body, and a plug body detachably screwed to the drinking mouth. The container body is composed of an inner cylinder into which a liquid enters and an outer cylinder that accommodates an inner cylinder provided on the outer peripheral side of the inner cylinder via a space.

  As conventional examples of this type of liquid container, there are those disclosed in, for example, Japanese Patent Application Laid-Open No. 2011-206408 (Patent Document 1) and Japanese Patent Application Laid-Open No. 10-272068 (Patent Document 2).

  The structure of the above-described Patent Document 1 will be described as a representative example. As shown in FIG. 8, for example, a metal main cylinder 2 and an outer cylinder 3 form a double-walled container body, respectively. ing.

  The inner cylinder 2 has a container shape having a body portion 21 and a bottom portion 22, and an outer diameter D <b> 2 of an upper end portion 2 a of the inner cylinder 2 is reduced from an outer diameter D <b> 1 of the body portion 21. The outer cylinder 3 is a cylindrical body having both ends open, and the inner diameter of the upper end 3a of the outer cylinder 3 is reduced to be the same as the outer diameter D2 of the upper end 2a of the inner cylinder 2. On the other hand, the lower end portion 3b of the outer cylinder 3 is opened with the inner diameter D3 of the body portion 31 remaining.

  Further, the bottom member 4 has a container shape in which an annular rising portion 4b is integrally formed on the outer peripheral edge of the bottom surface portion 4a, and the lower end portion 3b of the outer cylinder 3 is fitted on the upper portion of the rising portion 4b. A reduced diameter step portion 4c to be combined is provided.

  Then, the inner cylinder 2, the outer cylinder 3, and the bottom member 4 are integrally assembled as follows.

  That is, first, before assembling the bottom member 4 to the lower end portion 3b of the outer cylinder 3, the upper side of the inner cylinder 2 is inserted upward from the opening on the lower end portion 3b side of the outer cylinder 3, In a state where the outer surface of the upper end 2a is joined to the inner surface of the upper end 3a of the outer cylinder 3, the upper ends 2a and 3a are welded (welded portion H1).

  Subsequently, the rising portion 4b of the bottom member 4 is inserted into the opening of the lower end portion 3b of the outer cylinder 3 from below (the end surface of the outer cylinder lower end portion 3b is placed on the reduced diameter step portion 4c of the bottom member rising portion 4b. ), The outer cylinder lower end portion 3b and the bottom member rising portion 4b (reduced diameter step portion 4c) are welded (welded portion H2) to be assembled into a bottle body having an inner / outer double structure.

  And after assembling in this way, the container main body of a double wall structure is completed by vacuum-processing between the inner and outer double walls.

  By the way, in the conventional configuration, as illustrated in FIG. 8, the diameter is reduced until the inner diameter (dimension D2) of the upper end portion 3a of the outer cylinder 3 is smaller than the outer diameter (dimension D1) of the trunk portion 21 of the inner cylinder 2. Therefore, when the inner cylinder 2 and the outer cylinder 3 are assembled, it is necessary to insert the inner cylinder 2 into the outer cylinder 3 from below. And the upper end part 2a of the inner cylinder 2 and the upper end part 3a of the outer cylinder 3 are welded (welding part H1) in the state joined by the upward attitude | position, respectively.

  On the other hand, in order to insert the inner cylinder 2 into the outer cylinder 3 from below, the opening of the lower end portion 3b of the outer cylinder 3 is made larger than the maximum outer diameter of the inner cylinder 2 (the outer diameter D1 of the body portion 21). (In the example of FIG. 8, the inner diameter of the lower end portion 3b of the outer cylinder 3 is a large opening diameter that is the same as the inner diameter D3 of the barrel 31 of the outer cylinder 3).

  When the inner diameter of the lower end portion 3b of the outer cylinder 3 is increased in this way, the opening end portion of the lower end portion 3b of the outer cylinder 3 remains open straight downward, and the opening portion of the outer cylinder lower end portion 3b is opened. In order to close the end face, it is necessary to provide the bottom member 4 at the lower part of the outer cylinder lower end part 3b and to connect the rising part 4b (the reduced diameter step part 4c) at the upper part.

  For this reason, in the configuration of FIG. 8, the lower end 3b of the outer cylinder 3 and the bottom member are raised when the lower end 3b of the outer cylinder 3 is placed on the reduced diameter step 4c of the rising part 4b of the bottom member 4. The reduced diameter step portion 4c of the portion 4b is welded (welded portion H2) over the entire circumference.

  As a result, an annular welding mark H2 appears at a position near the lower part of the side surface of the container body.

  The double-wall bottle of Patent Document 2 is also welded in a state where the upper end of the inner cylinder and the upper end of the outer cylinder are joined in an upward posture, and the bottom member is continuous below the lower end of the outer cylinder. In this way, an annular weld mark also appears at a position near the lower part of the side surface of the bottle.

JP 2011-206408 A JP-A-10-272068

  As described above, in a conventional liquid container (such as the one shown in FIG. 8), the joint portion between the lower end portion 3b of the outer cylinder 3 and the bottom member 4 appears as an annular weld mark H2 near the lower portion of the bottle side surface. This does not disappear completely even after cutting after welding, and it remains uncomfortable after painting. In particular, the side surface of the container body can be seen well, and if there is a welding mark H2 on the side surface of the bottle, it is not preferable in terms of design.

  Therefore, in the liquid container of FIG. 8, in order to prevent the welding trace H2 from appearing on the side surface of the main body, for example, the bottom member 4 attached to the lower end portion 3b of the outer cylinder 3 is welded to the inner surface portion of the outer cylinder lower end portion 3b. However, in this case, the end surface of the outer cylinder lower end 3b is exposed as it is on the bottom surface of the bottle. Thus, when the end surface of the outer cylinder lower end 3b is exposed as it is on the bottom surface of the main body, it looks bad when looking at the bottom surface of the main body. ) And the corner (edge) may damage the table surface or the like.

  Accordingly, the present invention has been made to improve the above-described conventional problems, and in a liquid container having a double wall structure with an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are connected to the shoulder of the container body. An object of the present invention is to provide a liquid container in which welding marks between the outer cylinder and the bottom member do not appear on the side surface of the container main body by being joined via a drinking mouth part in the vicinity of the part.

  In order to achieve the above object, the present invention is configured with the following problem solving means.

That is, the problem-solving means of the present invention includes a body part and a mouth part having a smaller diameter than the body part, and a bottle-shaped inner cylinder into which a liquid is placed and the body part of the inner cylinder through a heat insulating space. a container body consisting of an outer cylinder of the cylindrical body shape as a whole, which contains Te, bent into a curved shape matching the inner peripheral surface side downwardly and the outer circumferential surface below both of the upper portion to the upper portion of the container body A mouth part having a bent portion, the mouth part being integrated with the upper end side body part of the inner cylinder or separately from the upper end side body part of the inner cylinder via a mouth opening forming member In the liquid container provided, the upper end portion of the outer cylinder is opened with an opening diameter larger than the maximum diameter of the body portion of the inner cylinder at a position where the shoulder portion of the container body is formed, end of the bent portion of the outer circumferential surface below the spout portion is bent horizontally outward, the They are joined integrally to the outer diameter of the bent end portion bent in a flat outwardly against the upper end opening end portion of the outer tube in a manner equal to the outer diameter of the upper opening end portion of the outer tube It is characterized by that.

Thus, in the problem solving means of the present invention, the body portion and the mouth portion having a smaller diameter than that of the body portion, the bottle-shaped inner cylinder into which the liquid is put and the body portion of the inner cylinder are provided with a heat insulating space. bent into a curved shape and the container body consisting of an outer cylinder of the cylindrical body shape as a whole, which contains, in the upper portion of the container body on the inner peripheral surface side downwardly and the outer circumferential surface below both of the upper end via A drinking mouth portion having a bent portion, the drinking mouth portion being integrated with the upper end side mouth portion of the inner cylinder or separately from the upper end side mouth portion of the inner cylinder via a drinking mouth forming member. Te liquid container odor obtained by the so that provided in the upper end of the outer tube is open at a large opening diameter than the maximum diameter of the body portion of the inner tube at a position which forms a shoulder of the container body on the other hand, the end portion of the bent portion of the outer circumferential surface below the drinking spout is folded horizontally outwardly Under is, the outer diameter of the bent end portion bent in the horizontal direction outwardly against the upper end opening end portion of the outer tube in a manner equal to the outer diameter of the upper opening end portion of the outer tube junction It is mono-conjugated.

As a result, the barrel portion and the mouth portion having a smaller diameter than that of the barrel portion, a bottle-shaped inner cylinder into which liquid is put, and the barrel portion of the inner cylinder as a whole are accommodated via a heat insulating space. The outer cylinder of the shape was joined and integrated with each other at the shoulder forming position of the container main body, the upper end portion had a curved drinking mouth portion, and the shoulder portion had a reduced diameter step portion for fitting a plug body A container body is formed.

With the configuration like this, it is possible to increase as much as possible in the range capable of securing the diameter adiabatic space required for the body portion of the inner cylinder of the bottle shape to be housed in the outer cylinder, the inner cylinder barrel The volume of the part can be increased as much as possible. And even in such a case , the outer cylinder has a cylindrical shape as a whole, and the upper end of the outer cylinder is opened with an opening diameter larger than the maximum diameter of the trunk of the inner cylinder. It makes it possible to insert the barrel of the upper or al the cylinder, as in the prior art eliminates the need for bonding the bottom portion of the outer tube at the lower side surface of the outer tube, there is no welding marks below the outer cylinder, the design It becomes a clean state.

Moreover, the inner cylinder is formed by a body part and a mouth part having a smaller diameter than the body part, and the drinking part joining the inner cylinder and the outer cylinder is a mouth part having a smaller diameter than the body part on the upper end side of the inner cylinder. Provided in the department. Then, in the same mouth body, bent to the outer peripheral surface below the spout portion to have a bent portion which is bent to the inner peripheral surface side downwardly and the outer peripheral surface, respectively the lower curved in the same mouth body upper end end parts are further bent horizontally outwards, the upper end opening of the outer cylinder in a manner to equalize the outer diameter of the bent end portion of the horizontal outward to the outer diameter of the upper opening end portion of the outer tube that has become so that joined integrally butt end. Therefore, as described above, the diameter of the mouth part of the inner cylinder having the drinking mouth part is smaller than that of the trunk part, and the opening diameter of the upper end part of the outer cylinder for storing the inner cylinder is larger than the maximum diameter of the trunk part of the inner cylinder. also can respond sufficiently to the case is large, the inner tube joint after insertion into the barrel to more is easy.

The end portion of the outer circumferential surface (outer tube side) bent portion of the spout portion having a music-sectional shape which is bent to the inner peripheral surface side both directions below the inner snout body is bent horizontally outward , so that integrally joined against the upper opening end portion of the outer tube in a manner to equalize the outer diameter of the bent end portion bent in the horizontal direction outwardly to the outer diameter of the upper opening end portion of the outer tube since going on, the lever to adjust contact against substantially right angles joining end portions of the both can be easily formed a shoulder of the sharp edge shape without rounded surface.

As a result, according to the present invention, the following effects are obtained.
(1) There is no weld mark on the side of the container body, and the appearance, design and quality are improved.
(2) The bottom member can be formed into a flat plate shape, and the manufacturing cost can be reduced.
(3) Welding is simplified.

It is a longitudinal cross-sectional view of the liquid container which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the decomposition | disassembly state of each structural member in the container main body used for the liquid container of FIG. FIG. 2 is an enlarged vertical sectional view of the upper part of the liquid container in FIG. 1. FIG. 2 is an enlarged vertical sectional view of a lower part of the liquid container in FIG. 1. FIG. 2 is an enlarged longitudinal sectional view of a drinking part of a container body used in the liquid container of FIG. 1. FIG. 6 is an enlarged cross-sectional view of a drinking part showing a first modified example of the joint structure of the shoulder in the container body of FIG. 5. It is a drinking mouth part expanded sectional view which shows the 2nd modification of the joining structure of the shoulder part in the container main body of FIG. It is a longitudinal cross-sectional view of a well-known (patent document 1) liquid container.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 5 show the configuration of the liquid container according to the embodiment of the present invention, and FIGS. 6 and 7 show the configurations of the modified example of FIG. 5 (first modified example and second modified example), respectively. Example configuration).

<Configuration of the entire container>
The liquid container shown in FIG. 1 is made of metal (in this embodiment, made of stainless steel) and has a vacuum double-walled container body 1 (the heat insulating structure is limited to vacuum heat insulation). (Not a thing), it is comprised with the plug body 6 screwed together by the drinking part 12 of this container main body 1. FIG.

  In this embodiment, for example, as shown in an exploded view in FIG. 2, the container body 1 includes an inner cylinder 2 into which a stainless steel liquid is placed, an outer cylinder 3 that houses the inner cylinder 2, Assembling it into a vacuum double-walled bottle structure using four components consisting of a bottom member 4 that closes the bottom of the outer cylinder 3 and a drinking mouth forming member 5 that forms a drinking mouth portion 12 of the container body 1. Yes.

  The inner cylinder 2 is formed in a bottle shape by joining a shallow container-shaped bottom portion 22 to the upper barrel portion 21 and a lower end portion of the barrel portion 21 by welding (refer to a circumferential weld H3). The inner cylinder 2 has various vertical sizes and diameters.

  The outer diameter of the barrel 21 portion of the inner cylinder 2 (the dimension D4 in FIG. 2 indicates the maximum outer diameter of the barrel 21 portion of the inner cylinder 2) is the barrel 31 portion of the outer cylinder 3 as will be described later. 2 (dimension D5 in FIG. 2 indicates the inner diameter of the upper end 33 portion of the outer cylinder 3), and a vacuum insulation space having a necessary and sufficient width is secured between the body portions 21 and 31. It is set in the range to get.

  At the upper part of the inner cylinder 2, a constricted part (heat-keep neck part) 23 whose diameter is reduced inward and a mouth part 24 continuous with the upper part of the constricted part 23 are integrally formed. The constricted portion 23 serves as an abutment seat for a packing 66 of the plug body 6 described later, and can reduce the inward diameter (decrease the heat radiation area), thereby improving the heat retaining properties of the contents (liquid). It has a heat keep function.

  A female screw portion 25 for screwing the plug body 6 is formed on the inner peripheral surface side of the mouth portion 24 of the inner cylinder 2.

  On the other hand, the outer cylinder 3 has a simple cylindrical shape as a whole, but a flange-shaped inner bent portion 32 that is bent inward over the entire circumference is formed at the lower end portion of the body portion 31. . The inward bending portion 32 is bent inward by a predetermined width (dimension L). An opening 35 for joining the bottom member 4 having a predetermined diameter (dimension D6) is formed inside the inner end portion 32a of the inner bent portion 32. In the configuration of this embodiment, when the inner cylinder 2 is housed in the outer cylinder 3, the inner cylinder 2 is connected to the outer cylinder 3 with respect to the outer cylinder 3, as will be described later. 31 so that the inner end portion 32a of the inner bent portion 32 has a diameter (dimension D6) outside the barrel portion 21 of the inner cylinder 2. There is no problem even if it is smaller than the diameter D4.

  As will be described later, the outer end portion 41 of the bottom member 4 is joined to the inner end portion 32a of the inner bent portion 32 from the lower surface side. In order to prevent the bottom member 4 from coming into direct contact with the table surface, the inner end 32a of the inner bent portion 32 is stepped up by a predetermined height.

  The upper end portion 33 of the body portion 31 of the outer cylinder 3 is opened upward with substantially the same diameter without being particularly reduced in diameter from the body portion diameter (tube diameter). That is, the opening diameter D5 of the opening 34 of the upper end portion 33 is an opening diameter larger than the maximum outer diameter D4 of the body portion 21 of the inner cylinder 2 described above by a predetermined dimension. Thus, when the inner cylinder 2 is assembled into the outer cylinder 3, the body portion 21 of the inner cylinder 2 can be inserted from the opening 34 side of the body upper end portion 33 of the outer cylinder 3. Yes.

  In the configuration of this embodiment, the body portion 31 portion of the outer cylinder 3 is formed such that the lower half portion 31a portion is slightly smaller in diameter than the upper half portion 31b portion. When the lower half 31a portion of the body 31 is slightly smaller in diameter than the upper half 31b, the liquid container is removed from the hand when the lower half 31a portion of the body 3 is gripped. It becomes difficult to slip off. Further, the appearance shape can be changed in design.

  The bottom member 4 is superposed and joined to the inner end portion 32a of the inner bent portion 32 of the outer cylinder 3 from below. The bottom member 4 has a disk shape with an outer diameter that allows the outer end portion 41 to overlap the lower surface of the stepped portion of the inner end portion 32a of the inner bent portion 32 of the outer cylinder 3 by a predetermined width. doing. In the bottom member 4, after the components shown in FIG. 2 are assembled in the double wall structure as shown in FIG. 1, the exhaust holes 42 for evacuating the spaces V 1 and V 2 between the double walls. And a getter material 44 for adsorbing the gas generated in the vacuum spaces V1 and V2 is attached on the upper surface side.

<Composition of the mouthpiece>
Next, in this embodiment, a drinking mouth is formed between the upper end portion 26 (upper end portion of the mouth portion 24) of the inner cylinder 2 and the upper end portion 33 (upper end portion of the body portion 31) of the outer cylinder 3. The member 5 is interposed. This drinking mouth forming member 5 is located between the upper end portion 26 of the mouth portion 24 of the inner cylinder 2 and the upper end portion 33 of the trunk portion 31 of the outer cylinder 3 as shown in FIGS. As shown in detail in FIG. 5, a cylindrical shape in which both upper and lower ends are joined, a vacuum heat insulating space V2 having a predetermined width is formed inside, and a drinking mouth portion 12 having an inverted U-shaped cross section having a predetermined curvature is formed. The body is adopted.

  That is, the drinking mouth forming member 5 is configured by a cylindrical body having a bent portion with a predetermined curvature bent in both the inner and outer directions at the upper end portion thereof, and the upper end portion side of the cylindrical body is inward ( The inner bent portion 51 is bent in a curved shape (on the inner cylinder side), while the outer horizontal portion 52 is bent in an outward horizontal posture at the outer cylinder side lower end portion of the cylindrical body. And this drinking mouth formation member 5 superposes the outer peripheral surface of the front end portion (downward portion) of the inner bent portion 51 on the upper inner cylinder side to the inner peripheral surface (mating surface) of the upper end portion 26 of the inner cylinder 2. While joining by welding, the tip outer diameter of the outward horizontal portion 52 on the lower outer cylinder side is abutted up and down so as to be the same as the outer diameter of the upper end portion 33 of the outer cylinder 3, and is joined and integrated by welding. ing.

  That is, in the same configuration, the drinking mouth forming member 5 forming the drinking mouth portion 12 is separate from the inner cylinder 2 and the outer cylinder 3, and the shape can be freely processed. Therefore, for example, as shown in FIG. 5, the shape of the upper end portion 12 a of the drinking mouth portion 12 that directly attaches a mouth when drinking can be formed into a rounded shape with a large curvature as desired, and the inner tube 2 and the outer tube 3 Different materials (hollow coating members, etc.) can be used, and the degree of freedom in processing and material selection is increased.

  As a result, it is possible to form a mouthpiece with a soft mouthfeel and material.

<Assembly method of each component>
And each said member (4 members of the inner cylinder 2, the outer cylinder 3, the bottom member 4, and the drinking mouth formation member 5) which comprises the container main body 1 is assembled | attached as follows.

  First, the inner cylinder 2 and the mouthpiece forming member 5 are joined and integrated by welding. In this case, the inner tube 2 and the inner mouth surface of the upper end portion 26 of the inner cylinder 2 are swallowed from the separated state of FIG. In a state in which the outer peripheral surface of the front end portion (portion extending downward) of the inner bending portion 51 of the mouth forming member 5 is superposed, the superposed portion is welded over the entire circumference (the welded portion in FIGS. 1, 3, and 5). H4).

  Next, the inner cylinder 2 in which the drinking mouth forming member 5 is integrated in this way is inserted downward from the bottom 22 side through the opening 34 of the upper end portion 33 of the outer cylinder 3 to form the drinking mouth. The outer peripheral end portion of the outward horizontal portion 52 of the member 5 is placed on the upper end portion 33 of the outer cylinder 3. At this time, the outer diameter of the outer peripheral end portion of the outward horizontal portion 52 and the outer diameter of the outer cylinder upper end portion 33 are concentrically matched with each other so that the outer peripheral end portion of the outer horizontal portion 52 is the upper end of the outer tube 3. The outer peripheral end portion of the outward horizontal portion 52 and the outer cylinder upper end portion 33 are uniformly welded over the entire circumference while being placed on the portion 33 (see the welded portion H5 in FIGS. 1, 3 and 5). )

  Next, the outer peripheral end 41 of the bottom member 4 is applied from the lower side to the inner end 32a portion of the inner bent portion 32 on the lower surface of the body 31 of the outer cylinder 3, and at this time, for example, the outer cylinder 3 is moved up and down. If it stands upside down, the bottom member 4 can be easily placed on the inner end portion 32 a of the inner bending portion 32. Then, the outer peripheral end 41 of the bottom member 4 and the inner end of the inner bent portion 32 of the outer cylinder 3 in a state where the outer peripheral end 41 of the bottom member 4 is overlapped with the inner end 32 a of the inner bent portion 32 of the outer cylinder 3. The part 32a is welded over the entire circumference (see the welded part H6 in FIGS. 1, 3, and 5).

  By carrying out each of the above operations, a double-walled container body 1 (container body before evacuation) in which the inner cylinder 2, the outer cylinder 3, the bottom member 4, and the drinking mouth forming member 5 are integrated is formed. After that, when the vacuum between the double walls is evacuated from the exhaust hole 42 in the vacuum heating chamber and the exhaust hole 42 is sealed with the sealing material 43, the vacuum having the vacuum heat insulating spaces V1 and V2 as shown in FIG. The double-walled container body 1 is completed.

  In manufacturing the container body 1, in the above operation, the bottom member 4 is assembled to the bottom of the outer cylinder 3 (the inner end 32a of the inner bending part 32). After assembling the mouth forming member 5), the bottom member 4 is assembled to the bottom portion of the outer cylinder 3 (inner end portion 32 a of the inner bending portion 32). 4 may be welded to the bottom of the outer cylinder 3 first, and then the outward horizontal portion 52 of the drinking mouth forming member 5 assembled to the inner cylinder 2 and the outer cylinder 33 may be welded.

  In the container body 1 manufactured in this manner, unlike the conventional welding, the space between the inner cylinder 2 and the outer cylinder 3 (and the mouthpiece forming member 5) is also a vacuum heat insulating space V2. It has a high thermal insulation function. Further, in the container body 1, a drinking mouth is provided on the upper part of the body body 11 of the container body 1 (a body part formed by the body part 21 of the inner cylinder 2 and the body part 31 of the outer cylinder 3) via a shoulder part 13. A portion 12 (portion comprising the mouthpiece forming member 5 and the mouth portion 24 of the inner cylinder 2) is formed, and the stopper body 6 is screwed into the mouthpiece portion 12.

  The plug body 6 used in this embodiment covers a plug body 61 formed of a synthetic resin material, an upper plate 62 assembled on the upper portion of the plug body 61, and an upper portion of the upper plate 62. And an upper cover 64.

  On the outer peripheral surface of the plug body 61, a male screw portion 65 is formed that is screwed into the female screw portion 25 formed on the inner peripheral surface of the mouth portion 24 of the inner cylinder 2. A sealing packing (packing made of silicon rubber or the like) 66 that is in contact with the constricted portion 23 of the inner cylinder 2 described above is attached to the lower outer periphery of the plug body 61.

  An annular skirt portion 63 that covers the outer peripheral surface of the mouthpiece portion 12 of the container body 1 is integrally formed on the outer peripheral portion of the upper plate 62. The skirt 63 serves as a gripping knob when the plug body 6 is rotated.

  And this plug body 6 abuts the packing 66 on the upper surface of the constricted portion 23 by screwing (tightening) the male screw portion 65 into the female screw portion 25 on the container main body 1 side. The inside of the main body 1 (inner cylinder 2) is hermetically kept warm.

  By the way, in the liquid container of this embodiment, as described above, the outer cylinder 3 itself of the container body 1 also serves as an outer case and is exposed to the outside as it is. Therefore, like the liquid container of the conventional example (FIG. 8) already described, if there is a weld mark H2 on the side surface of the bare container body, the weld mark H2 can be seen from the outside, so the appearance is poor and the design is also good. It is not preferable.

  Therefore, in the liquid container of this embodiment, welding marks do not appear on the side surface of the container body 1 by the following configuration.

  That is, in this liquid container 1, since the opening diameter D 5 of the upper end portion 33 of the outer cylinder 3 is larger than the outer diameter D 4 of the body portion 21 of the inner cylinder 2, the inner cylinder 2 is assembled into the outer cylinder 3. In addition, the bottom side of the inner cylinder 2 can be inserted from the opening 34 side of the upper end of the outer cylinder 3. Therefore, since it is not necessary to insert the inner cylinder 2 from the opening 35 side on the lower end side of the outer cylinder 3, the inner diameter D6 of the opening 35 on the lower end side of the outer cylinder 3 is the outer diameter of the body portion 21 of the inner cylinder 2. There is no problem even if it becomes smaller than D4.

And, thereby, the liquid container of this embodiment, the lower end of the outer tube 3 by bending a predetermined width inwardly over the entire circumference, the bottom to the inner end portion 32a of the bending portion 32 thereof The outer peripheral end 41 of the material 4 is joined, and the joint between the outer cylinder 3 and the bottom member 4 does not exist on the side surface portion of the container body 1. Therefore, the side surface of the liquid container 1 can be refreshed in design and the appearance can be improved.

  Of course, the joint portion H6 between the outer cylinder 3 and the bottom member 4 appears on the lower surface side of the container body 1, but the lower surface portion of the container body 1 is not visible from the outside at normal times (in the upright state of the liquid container). The joint portion H6 portion on the lower surface of the container body 1 does not become obstructive.

  In addition, in a liquid container having this type of vacuum double wall structure, the outer diameter of the inner cylinder 2 is within the range in which a vacuum heat insulating space V1 having a required width can be secured between the inner diameter and the outer cylinder 3. It is desirable to increase the capacity as much as possible to increase the capacity.

  Therefore, in the liquid container 1 of this embodiment, the upper end portion 33 of the outer cylinder 3 has an opening diameter D5 that is substantially the same as the inner diameter of the body portion 31 of the outer cylinder 3 without being reduced inwardly at all. .

  Accordingly, the entire upper side of the outer cylinder 3 has substantially the same diameter as that of the body portion 31, and the molding process of the outer cylinder 3 is simplified. As a result, costs are also reduced.

  Further, since the opening diameter D5 of the upper end portion 33 of the outer cylinder 3 is substantially the same as the inner diameter of the barrel 31 of the outer cylinder 3, the outer diameter of the barrel 21 of the inner cylinder 2 inserted into the outer cylinder 3 is increased. The diameter D4 can be made as close as possible to the opening diameter D5 of the outer cylinder upper end portion 33, and the volume of the inner cylinder 2 can be increased accordingly.

  The liquid container 1 of this embodiment has the following operational effects in addition to the operational effects described above.

  For example, the upper end portion 33 of the outer cylinder 3 and the outward horizontal portion 52 of the drinking mouth forming member 5 are joined at a substantially right angle, and sharpened by the outward horizontal portion 52 to the shoulder 13 of the container body 1. An edge shoulder is formed.

  Then, as shown in an enlarged view in FIG. 3, the lower end 63a of the skirt portion 63 of the plug body 6 is brought as close as possible to the upper surface 52a of the shoulder portion (outward horizontal portion 52), thereby lowering the lower end portion 63a of the shoulder portion. And the horizontal shelf upper surface 52a can be made as small as possible. Therefore, it looks better.

  Further, in the liquid container 1 of this embodiment, if the stopper 6 is removed, the person's mouth can be directly attached to the drinking mouth part 12 of the container main body 1 to drink the liquid inside. Since the upper end portion 12a of the drinking mouth forming member 5 has a curved surface (a rounded surface shape) having a sufficiently large curvature due to the internal bending of the drinking mouth forming member 5, the mouth feel when the mouth is attached to the upper end portion 12a of the drinking mouth portion 12 , Soft and good.

  As a result, in the liquid container according to this embodiment, the vacuum heat insulating space V2 is formed by the mouth portion 24 of the inner cylinder 2 and the mouth portion forming member 5 up to the upper end portion 12a of the mouth portion 12 of the container body 1. Therefore, for example, as in the conventional example, there is an effect that the heat retaining power in the drinking mouth portion 12 is improved as compared with the case where the upper end portions of the inner cylinder 2 and the outer cylinder 3 are joined and joined.

<Modification>
Next, FIG. 6 and FIG. 7 show configurations of modified examples 1 and 2 of the butting structure of the upper end portion 33 of the outer cylinder 3 and the outward horizontal portion 52 of the drinking mouth forming member 5 described above.

  First, in the configuration of the embodiment of FIG. 5 described above, the end portion of the outward horizontal portion 52 of the drinking mouth forming member 5 is put on the upper surface of the upper end portion 33 of the outer cylinder 3 and is abutted against it. In the configuration of Modification 1 in FIG. 6, the peripheral end portion of the outward horizontal portion 52 is abutted against the inner surface side of the outer cylinder upper end portion 33, and in the configuration of Modification 2 in FIG. 7, the outward horizontal portion The front end portion of 52 and the outer cylinder upper end portion 33 are butted in a tapered surface state at an angle of 45 °. In any of these cases, similar objectives can be achieved.

  Furthermore, in the said embodiment, although the drinking mouth formation member 5 which consists of another member is interposed between the upper end part 26 of the inner cylinder 2, and the upper end part 33 of the outer cylinder 3, in other examples, Instead of using a separate member, the drinking mouth forming member 5 may be formed integrally and continuously from the upper end portion 26 of the inner cylinder 2.

  DESCRIPTION OF SYMBOLS 1 is a container main body, 2 is an inner cylinder, 3 is an outer cylinder, 4 is a bottom member, 5 is a drinking mouth formation member, 6 is a stopper, 11 is a trunk | drum of a container main body, 12 is a drinking mouth part, 13 is a shoulder part , 21 is a body part of the inner cylinder 2, 31 is a body part of the outer cylinder 3, 32 is an inner bending part, 33 is an upper end part of the outer cylinder 3, 51 is an inner bending part of a drinking mouth forming member, and 52 is a drinking mouth formation. It is an outward horizontal part of a member.

Claims (1)

Barrel and has a mouth body of smaller diameter than the body portion, the outer cylindrical body shape said barrel portion of the inner cylinder and inner cylinder of a bottle-shaped liquid is placed as a whole accommodating through insulation space comprising a container body composed of a cylinder, and a drinking spout having a container inner peripheral surface side downwardly and the outer peripheral surface side bent portion bent into a curved shape downward directions which are in the upper part the upper part of the body The liquid mouth part is a liquid container provided integrally with the upper end side body part of the inner cylinder or separately from the upper end side mouth part of the inner cylinder through a drinking mouth forming member, one upper end of the outer cylinder which is open at larger opening diameter than the maximum diameter of the body portion of the inner tube at a position which forms a shoulder of the container body, the outer circumferential surface below the drinking spout end of the bent portion is bent horizontally outward, folding bent in the horizontal direction outwardly songs Liquid container, characterized in that the outer diameter of the end portion are joined integrally against the upper end opening end portion of the outer tube in a manner equal to the outer diameter of the upper opening end portion of the outer tube.

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