JPH0240918Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a metal thermos flask in which a synthetic resin member such as a synthetic resin shoulder member is attached to a metal vacuum double container formed by joining a plurality of container constituent members by welding or the like.

Conventionally, this type of thermos flask has been manufactured by attaching synthetic resin members such as shoulder members to a metal vacuum double container, as is known from Japanese Utility Model Application Publication No. 143038/1983. Fix the mounting bracket and screw it to the synthetic resin member, or connect it by engagement.
Either the rotation is prevented, or the joint part of the metal vacuum double container is made into a flange shape, and this is used as the engagement edge with the ring body for attaching the synthetic resin member. For this reason, special fittings must be installed or used to attach synthetic resin components.
Installation work is troublesome and expensive.

In order to solve such problems, this idea was developed by attaching synthetic resin members such as synthetic resin shoulder members to a metal vacuum double container made by joining multiple container components together by welding etc. In the metal thermos flask, one of the annular joint edges of the vacuum double container
one joint edge is provided with an extension extending outward from the joint;
It is characterized in that the extension part is bent inward and forcefully fitted into the synthetic resin member.

With this configuration, the extension extending outward from the joint formed on one of the plurality of joint edges of the annular joint is
It is individually bent inward to form a joint, join,
Since it is forcibly fitted with a synthetic resin member that does not affect the maintenance of the joint, it works as a solid joint that can be joined without requiring any special members.

In particular, since the extension part is bent inward, when forcibly fitting the synthetic resin member, the bent part acts as a guide, allowing forcible fitting to occur easily and without difficulty, and once fitted. The bent edge of the extension portion engages with the synthetic resin member, and the elasticity of the bent edge in the engagement direction has the effect of reliably preventing disengagement.

In the first embodiment of the present invention shown in FIGS. 1 and 2, a vacuum double container 1 is constructed from three container components, namely, an inner container 2, an outer cylinder 3a, and a bottom plate 3b. These container components 2, 3a, and 3b are made of metal such as stainless steel. The outer cylinder 3a and the bottom plate 3b are joined by welding to form the outer container 3, as will be described later. The inner container 2 and the outer cylinder 3a are located at the top end (left end in FIG. 1) 4 of the vacuum double container 1.
The outer cylinder 3a and the bottom plate 3b are joined by welding at the bottom end (right end in FIG. 1) 5 of the vacuum double container 1 (they may also be joined by brazing). A space 6 formed between the inner and outer containers 2 and 3 is evacuated by exhaust through a tip tube 7 connected to the center of the bottom plate 3b. Inner container 2
consists of a body part 8 and a bottle mouth part 9, and a boundary part 10 between the body part 8 and bottle mouth part 9 is narrowed to the minimum diameter. On the other hand, the outer cylinder 3a is formed into a substantially cylindrical shape, and the joining edges 11a and 11b located at both ends thereof are formed to have a slightly smaller diameter than the other parts. The joining edge 12a located at the top end 4 of the inner container 2 is in close contact with the inner surface of the joining edge 11a at the top end of the outer cylinder 3a, and these joining edges 12a, 11a are joined by welding.
Furthermore, the joint edge 12a on the inner container 2 side has a curled extension 13a that bends inward.

The bottom plate 3b is formed into a substantially cup shape, and the joining edge 12b located at the bottom end 5 of the bottom plate 3b is in close contact with the inner surface of the joining edge 11b at the bottom end of the outer cylinder 3a, and these joining edges 12b, 11b are welded. are joined by. Also, the joint edge 12b on the bottom plate 3b side has a curled extension part 13b that bends inward, like the joint edge 12a on the inner container 2 side.

A shoulder member 14a made of synthetic resin and a ring 15a made of synthetic resin are attached to the top end 4 of the vacuum double container 1. The shoulder member 14a includes a small-diameter stopper support portion 16, a flap opening 17, and a reinforcing cylinder portion 18 formed on the back surface of the flap opening 17. A recess 20a that fits into the curled extension 13a is provided at the base end of the reinforcing cylindrical portion 18, and an inclined surface is provided on the right adjacent portion of the recess 20a to facilitate forcible fitting of the extension 13. A guide protrusion 21a having a diameter of 55 is provided.

The ring 15a has a hole 19a that locks one end of a shoulder strap (not shown), and the outer container 3
(It is possible to select whether the shoulder member 14a is fitted in a rotatable or non-rotatable state.) On the other hand, the shoulder member 14a is fitted on the reinforcing cylinder portion 18
The curled extension part 13a is in the recessed part 20a.
It is attached to the joint edge 12a on the inner container 2 side by forcibly fitting the two. Note that the joint edges 12a, 11b of the inner container 2 and the outer cylinder 3a are inserted into the gap formed between the ring 15a and the reinforcing cylinder part 18, but both the joint edges 12a, 1
Since the outward movement in the radial direction of 1b is restrained by the ring 15a, after the curled extension 13a passes over the guide protrusion 21a and engages with the recess 20a due to the forcible fitting, This fitting does not easily come off, and as a result, the shoulder member 14a is reliably held by both joining edges 12a, 11b. In FIG. 2, reference numerals 22 and 23 are stepped portions that are provided on the shoulder member 14a and the ring 15a, respectively, and that fit together.

A female thread 24 is provided on the inner periphery of the stopper support portion 16 of the shoulder member 14a, and a male thread 26 of the stopper 25 is screwed into the female thread 24, so that the stopper 25 can be detachably attached to the shoulder member 1.
It is attached to 4a. The tip end 27 of the stopper 25 is inserted into the bottle opening 9 of the inner container 2 to close it.
28 is a gasket attached to the base of the stopper tip 27;
29 is attached to the tip of the stopper tip 27 and the boundary portion 1
0 is an O-ring configured to be in close contact with 0, 30 is a heat insulating material, and 31 is a packing.

A synthetic resin bottom member 14b and a synthetic resin ring 15b are attached to the bottom end 5 of the vacuum double container 1. The bottom member 14b consists of a central part 32 formed in a cup shape so as to cover the tip tube 7, a cylindrical part 33 located on the outer periphery of the central part 32, and an outward flange part 34 on the edge of the cylindrical part 33. is forming. This cylindrical portion 33 is formed with a recess 20b and a guide protrusion 21b similar to those formed in the shoulder member 14a. On the other hand, the fitting edges 11a and 12b of the outer cylinder 3a and the bottom plate 3b are connected to the cylindrical portion 33 of the bottom member 14b.
and the ring 15b, and the bottom plate 3b
The curled extension 13b of the side joining edge 12b fits into the recess 20b. In the same way that the shoulder member 14a is held by the joint edges 12a, 11a on the top end 4 side, the bottom member 14b is held by the joint edges 12a, 11a on the side of the top end 4.
a and 11b are held. The ring 15b is provided with a hole 19b for locking one end of the shoulder strap.

A female thread 3 is provided on the inner peripheral surface of the cylindrical portion 33 of the bottom member 14b.
5 is provided, and the female screw 37 provided on the outer tip 36 is screwed into this female screw 35, and the outer tip 3 is removably attached.
6 is attached to the bottom member 14b. Matagata Kotup 3
An inner tip 38 is housed inside the 6. Nao 3
9 is a rib that prevents the outer tip 36 from wobbling.

In this embodiment, joint edges 12a, 11a, 12 are attached to two places on the top end 4 and bottom end 5 of the vacuum double container 1
b, 11b are provided, and a curled extension part 13a, 1 is integrally formed at the joint formed by these parts.
3b, and the shoulder member 14a and the bottom member 14b are held by these.
However, the joint part is formed only at one end of the vacuum double container 1, and the shoulder member 14 is formed by the extension part.
A or the bottom member 14b may be held.

The second embodiment of the present invention shown in FIGS. 3 and 4 has a joint edge 12b of the bottom plate 3b (even if it is a joint edge 11b of the outer cylinder 3a) in place of the curled extension 13b of the first embodiment. ) (which corresponds to the joint of the present invention) has a plurality of bent strip-like extensions 13 integrated therein.
c, 13c... are formed, and these are forcibly fitted into the fitting recess 41 of the bottom member 14b made of synthetic resin to hold the bottom member 14b.

The shoulder member 14a may be held in a similar configuration.

The present invention can be configured in various ways other than those shown in the above embodiments. For example, in the above example,
Although the metal vacuum double container 1 includes three container components: the inner container 2, the outer cylinder 3a, and the bottom portion 3b, the present invention is not limited thereto. Further, in the above embodiment, there is an extension part 13 integrally extending outward at the joint formed at the ends 4 and 5 of the metal vacuum double container 1.
a, 13b, . The case is not limited, and the synthetic resin members other than the shoulder member 14a and the bottom member 14b may be forcibly fitted by bending the extension portions inward.

Since the present invention has the above configuration, the following effects can be achieved.

There is no need to attach or use a special attachment member to attach the synthetic resin member, and it can be done easily and inexpensively.

The extension of one joint edge among the plurality of joint edges is
When bent individually, forming joints and joining work,
Since it is forcibly fitted with a synthetic resin member that does not affect the maintenance of the bonded state, it acts as a solid bond that can be bonded without the special member described above, so it may make the formation of the bonded part or the bonding work difficult, or it may adversely affect the bonded condition. This prevents the vacuum level of the metal vacuum double container from being compromised or the attachment of synthetic resin parts to come loose.

In particular, since the extension part is bent inward, when forcibly fitting the synthetic resin member, the bent part acts as a guide, allowing forcible fitting to occur easily and without difficulty, and once fitted. The bent edge of the extension part engages with the synthetic resin member, and the elasticity of the bent edge in the engagement direction has the effect of reliably preventing disengagement.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view of the position of the first embodiment of the present invention, Fig. 2 is an enlarged longitudinal sectional front view of the main part thereof, Fig. 3 is a longitudinal sectional front view of the main part of the second embodiment of the invention, Fourth
The figure is a perspective view of the main parts. 1... Vacuum double container, 11a, 11b, 12
a, 12b...Joint portion, 13a, 13b...Extension portion, 14a, 14b...Synthetic resin member.

Claims (1)

[Scope of utility model registration request] In a metal thermos flask in which a synthetic resin member such as a synthetic resin shoulder member is attached to a metal vacuum double container formed by joining a plurality of container constituent members by welding or the like, the annular joint of the vacuum double container A metal thermos flask, characterized in that one of the plurality of joint edges is provided with an extension extending outward from the joint, and the extension is bent inward and forcibly fitted to a synthetic resin member.