JPS628851Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a metal thermos flask in which an exhaust tip tube is provided at the bottom of a metal vacuum double container.

In this type of thermos flask, the tip tube is attached to the bottom of the vacuum double container by brazing, but this joint is weak compared to other metal parts.
There is a problem in that it is easily damaged or deformed by external impact.

In order to solve this problem, an exhaust chip pipe is installed in a recess formed on the back side of the bottom of a metal vacuum double container, and an exterior member is attached to the bottom, as disclosed in Japanese Utility Model Application Publication No. 56-19137. It is being

However, the so-called end plate that covers the concave part of the exterior member is a flat plate that cannot receive support from the inside, so if it is placed on or hits a slightly protruding part, it receives concentrated external force in the center. There is a dislike that it is easily damaged. If the exterior member is damaged, the external force is likely to be applied to the tip tube located just inside the exterior member, causing damage.

In order to solve such problems, the present invention provides a metal thermos flask in which an exhaust tip pipe is provided in a recess formed on the back side of the bottom of a metal vacuum double container, and an exterior member is attached to the bottom. In the bottom part, an inner cover is provided on the inside of the exterior member and has a substantially U-shaped cross section with an appropriate buffer gap for the tip tube part, and the upper end of the U-shaped cross section of the inner cover is connected to the bottom part. It is characterized by forming an abutment part that abuts at an appropriate position around the tip tube protrusion.

Due to this structure, the inner cover prevents external force from directly reaching the tip tube when the exterior member is damaged.
In particular, the inner cover has an abutting part that is supported around the tip tube protrusion at the bottom of the container to ensure a good buffer gap between the tip tube and the tip tube, and the part that covers the tip tube is approximately U-shaped. It is a part with a highly rigid mechanical structure and reliably protects the tip tube from the action of external forces.

The present invention will be specifically explained below based on embodiments shown in the drawings.

The embodiment shown in FIG. 1 relates to a portable metal thermos flask. A vacuum double container 3 consisting of an inner container part 1 and an outer container part 2 is made of metal such as stainless steel. The inner container part 1 and the outer container part 2 are welded and integrated at their upper edges (not shown). The outer container portion 2 has a cylindrical outer tube portion 4 and an inverted bottom plate portion 5 with respective lower edges 6a, 6.
At b, the parts are welded and integrated. A chip tube 7 is brazed to the center of the bottom plate portion 5,
After the air between the inner and outer container parts 1 and 2 is discharged through the tip tube 7, the tip tube 7 is closed to make the space 8 between the inner and outer container parts 1 and 2 a vacuum.

The lower end of the side wall 9 of the bottom plate portion 5 reaches below the lower end of the tip tube 7, forming a recess c for accommodating the tip tube 7. Further, the lower part 10 of the outer cylindrical portion 4 is located outside the side circumferential wall 9, and as described above, the lower edge 6b of the side circumferential wall 9 and the lower edge 6a of the outer cylindrical portion 4 are welded together. It is joined.

A curled edge 11 that bends inward is formed on the lower end edge 6b of the side peripheral wall 9, and a bottom member inner cover 12 made of synthetic resin is force-fitted and coupled using this curled edge 11. As shown in FIG. 1, this bottom member 12 consists of a side peripheral wall part 13 and a top plate part 14. An outward flange 15 is provided at the lower end of the side peripheral wall part 13, and the tip tube 7 is provided in the center of the top plate part 14. A recessed part 16 is formed to surround the recessed part 16 with a buffer gap A and a substantially U-shaped cross section. A contact portion B is formed. Thereby, the concave portion 16 reliably prevents external force from being applied to the tip tube 7 even if the outer tip 23 as an exterior member is damaged. a lower end of the outer periphery of the side peripheral wall portion 13;
That is, a fitting groove 17 that fits into the curled edge 11 is provided around the connecting portion with the outward flange 15, and a guide protrusion 18 is provided above the fitting groove 17. Thus, the bottom member 12
When pushed into the bottom plate part 5 of the outer container part 2, the curled edge 11 is guided by the guide protrusion 18 and then fitted into the fitting groove 17, and the bottom member 12 is pushed into the bottom plate part 5 and the vacuum It is force-fitted and coupled to the double container 3.

The lower end edge 6a of the outer cylinder part 4 of the outer container part 2 is formed to have a smaller diameter than other parts, and a step part 19 is formed between it and the upper part. A string ring 20 made of synthetic resin is fitted below the stepped portion 19, that is, on the outer periphery of the lower edge 6a. This string ring 20
is restrained from vertical movement by the stepped portion 19 and the outward flange 15, and is rotatably arranged. The strap ring 20 is fitted around the outer periphery of the lower edge 6a before the bottom member 12 is force-fitted into the vacuum double container 3, and is restrained and supported in the position at the same time as the force-fitting is completed. However, on the other hand, the lower edges 6a, 6 of the vacuum double container 3
It functions to restrict outward expansion of b during forced fitting. Reference numeral 21 denotes a string locking hole provided in the string hanging ring 20, which locks one end of a shoulder strap (not shown).

A female thread 22 is provided on the inner surface of the side peripheral wall portion 13 of the bottom member 12, and a male thread 24 provided on the outer surface of the outer tip exterior member 23 is screwed into this female thread 22, thereby attaching the outer tip 23. Removable bottom member 1
It is installed on 2. Moreover, an inner tip 25 is housed inside the outer tip 23.

In FIG. 1, 26 is the string hanging ring 21.
This is a string hanging ring which has a string locking hole 27 and is rotatably supported at the upper end of the vacuum double container 3. This string hanging ring 26 is restrained from moving in the vertical direction by a step 28 formed near the upper end of the double vacuum container 3 and a shoulder member 29 attached to the upper end of the double vacuum container 3. . Further, in FIG. 1, reference numeral 30 denotes a stopper for closing the bottle opening (not shown) of the vacuum double container 3.

As described above, this embodiment is a metal thermos flask in which the exhaust tip tube 7 is provided at the bottom part (corresponding to the bottom plate part) 5 of the metal vacuum double container 3. The outer peripheral edge of the bottom part of the pipe is extended so as to be able to surround the tip tube 7, and this hanging extension part (the lower part and the side peripheral wall correspond to this) 1
0 and 9, the chip tube 7 is protected. In this embodiment, the hanging extensions 9 and 10 have a double wall structure, but they can also have a single wall structure, an example of which is shown in FIGS. 2 and 3.

In the embodiment shown in FIG. 2, only the lower part 10 of the outer cylinder part 4 of the outer container part 2 is extended to hang down, and this is used as a hanging extension part for protecting the tip tube 7. On the other hand, in the embodiment shown in FIG.
Only the side circumferential wall 9 of the tip tube 7 is extended downwardly to form a downwardly extending portion that protects the tip tube 7. In both of these embodiments, the abutment part B of the bottom member 12 is attached and supported by the support fittings 31 and bolts 32 spot-welded to the bottom plate part 5, and the tip tube 7 is secured by the recessed part 16. This further strengthens the protection of 33 in Figure 2 and 34 in Figure 3
is a rib provided on the bottom member 12 to prevent rattling between the bottom member 12 and the hanging extensions 10 and 9. Furthermore, in FIG. 3, the outer peripheral wall 35 of the bottom member 12 allows the bottom plate portion 5 to
It covers the side peripheral wall 9 of , giving it a beautiful appearance.

According to the present invention, an inner cover is provided inside the exterior member at the bottom of the container and has a buffer gap for the tip tube, so even if the exterior member is damaged, the inner cover will prevent external force from acting on the tip tube. You can prevent it from happening. In particular, the tip tube cover part of the inner cover has a highly rigid mechanical shape with a substantially U-shaped cross section with a buffer gap between it and the tip tube, and moreover, the upper end of the U-shaped cross section is connected to the tip tube at the bottom of the container. Since the abutting portion is abutted at a proper place around the protruding portion, the tip tube is securely protected.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIGS. 2 and 3 are longitudinal sectional front views of main parts showing other embodiments of the present invention. 3... Vacuum double container, 5... Bottom, 7... Tip tube, 12... Bottom member (inner cover), 23... Outer tip (exterior member), 16... Recessed part (U-shaped cross section) , A...buffer gap, B...contact part, C...
recess.

Claims (1)

[Scope of Claim for Utility Model Registration] A metal thermos flask in which an exhaust tip tube is provided in a recess formed on the back surface of the bottom of a metal vacuum double container, and an exterior member is attached to the bottom, wherein the exterior is attached to the bottom. An inner cover having a substantially U-shaped cross section with an appropriate buffer gap for the tip tube portion is provided inside the member, and the upper end of the U-shaped cross section of the inner cover is placed at an appropriate place around the tip tube protrusion at the bottom. A metal thermos flask characterized by having a contact portion that comes into contact with.