JPS6245621Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a bottom device for a pot such as a thermos flask.

A thermos flask in which a female screw ring for pushing up an inner container and a male screw is attached to the bottom of an outer case is known, for example, from Japanese Utility Model Application Publication No. 55-159031. According to this thermos flask, a female thread ring having a diameter approximately equal to the barrel diameter is attached to the inner periphery of the lower end of the barrel at an opening at the lower end of the barrel close to the barrel diameter, and the attachment portion is located at the lower end of the thermos main body.

However, in the conventional example described above, in order to attach the female thread ring, it is necessary to provide a separate member on the inner periphery of the lower end of the body, which not only increases the number of parts, but also increases the number of parts.
Two types of parts, a body part and a bottom plate (femally threaded ring body), appear on the side circumferential surface, and the design lacks simplicity. Another disadvantage is that if the internally threaded ring comes off during the assembly process or during use, there is a risk that the inner container may fall out from the opening at the lower end of the body, which has a size close to the diameter of the body.

Therefore, in the present invention, the bottom of the metal body of the outer case is wrapped around inside the body diameter of the inner container to form a bottom opening of the metal body, and the internally threaded ring body is directly fitted into this bottom opening. Therefore, it is an object of the present invention to provide a bottom device for a pot such as a thermos flask, which can eliminate the drawbacks of the conventional example.

This invention will be explained below based on embodiments shown in the drawings.

The metal body of the outer case 2 of the thermos flask 1 is composed of a side part 2A and a bottom part 2B, and the side part 2A2A
An inner edge 3 is formed at the upper end, and a notch 4 for escaping the spout 6 of the lower spout member 5 is formed. In the body portion 2A, a lower spout member 5 having a spout 6 connects an outer edge 7 of its upper end to an inner edge 3.
The spout 6 is fitted in the notch 4 so as to be in contact with the notch 4.

A top plate 9 having an opening 8 in the center is fixed to the upper end of the lower mouth member 5, and the top plate 9 has a spout 6.
A plurality of rectifier plates 10 are installed in the portion facing the bottom of the
is integrally molded. A nut 12 is screwed into the cylindrical male threaded portion 11 at the lower part of the lower mouth member 5, and the nut 12 allows the upper end of the annular reinforcing member 13 fitted to the lower mouth member 5 to be pushed inward. Press the reinforcing member 13 against the lower surface of the edge 3 and attach the reinforcing member 13 to the inner edge 3 and the nut 1.
A tension state is established between the reinforcing member 1 and the other reinforcing member 1.
3 in such a state, a downward force is applied to the lower mouth member 5, and its outer edge 7 is pressed against the inner edge 3. A female thread 1 is provided on the inner surface of the hanging wall 14 of the lower mouth member 5, which is open at the part leading to the spout 6.
5 is formed, and a male thread 17 formed on a plug 16 having a gasket 53 for closing the opening of the lower mouth member 5 is screwed into the female thread 15.
6 is an upwardly open shell-like body 1 having a male thread 17;
8, and a top plate 19 fitted to the upper part of the main body 18.
and a heat insulating core material 21 housed within the main body 18 and pressed by a projection 20 formed on the top plate 19.

A modified U-shaped handle 22 is attached to the side portion 2A of the exterior case 2 in the following manner.
That is, through-holes 23 are formed in the upper and lower parts of the side part 2A, the upper and lower horizontal ends of the handle 22 are applied to these through-holes 23, and the screws 25 are inserted into the screw holes 24 formed at the ends of the through-holes 23. They are screwed together through.

The upper end of the handle 22 is the upper part of the side part 2A, more specifically, the inner edge 3, the lower mouth member 5, and the reinforcing member 1.
Since the nut 12 is attached to the upper end portion of the side portion 2A reinforced by the cooperation of the
This makes it possible to increase the attachment strength of the handle 22 compared to conventional thermos flasks in which the upper end of the handle 22 is attached to a slightly lower portion of the side portion 2A that is not reinforced. A female threaded ring 27 is fitted into the lower end of the side portion 2A, and the female threaded ring 27 is held by an inwardly upwardly directed edge 26 formed by bending the lower end of the side portion 2A inward.

A stepped portion 28 for receiving the lower end of the side portion 2A is formed at the upper part of the bottom portion 2B that forms the exterior case 2 together with the side portion 2A, and a male thread is formed rising from the inner end of the stepped portion 28. A portion 29 is screwed into the female threaded ring 27 and integrated with the side portion 2A.

A required number of through holes 32 are drilled in the lower part of the side portion 2A and the female threaded ring 27 fitted therein, and the male threaded portion 29 is formed so as to face the through holes 32.
has a through hole 3 with a size corresponding to the inner diameter of the screw 34.
3 is formed, by forcibly screwing the screw 34 into the through hole 33 through the through hole 32 in the same manner as using a tapping screw, the male threaded portion 29
In other words, the bottom portion 2B is prevented from coming off from the side portion 2A. Note that the side portion 2A and the bottom portion 2B may be formed as one piece. The bottom portion 2B has a curved surface that curves smoothly inward, and the lowermost surface portion 3
6 to the inner side of the body diameter of the inner container 47 to form a bottom opening of the outer case 2. A female threaded ring body 38 for screwing into the male threaded body 43 for pushing up the medium container is elastically fitted into this bottom opening. The female threaded ring body 38 has a female thread 39 on its inner periphery that engages with the male thread 44 of the male threaded body 43, and an annular leg 40 for attachment to the lowermost surface portion 36 on its outer periphery.
A contact flange 41 that contacts the lower surface of the lowermost surface portion 36 is formed at the lower end of the outer periphery of the annular leg 40, and an engagement ridge 42 is formed above the flange 41 on the outer periphery of the annular leg 40. The flange 41 is elastically engaged from below with a bent edge 50 that is bent upward and slightly inwardly on the inner periphery of the portion 36.
is elastically fitted to the bottom portion 2B in a state where it is pressed to the lower surface of the lowermost surface portion 36.

The flange 41 has anti-rotation protrusions 30 that engage with small holes 51 that are formed at equidistant positions in the circumferential direction of the lowermost surface part 36 on the upper surface that is crimped onto the lowermost surface part 36.
Furthermore, protruding legs 31 are formed on the lower surface of the bottom portion 2B, respectively, so as to protrude downward from the lower surface of the bottom portion 2B. This protrusion 3
0 prevents the bottom portion 2B and the internally threaded ring body 38 that is directly elastically fitted thereto from rotating, and the protruding legs 31 prevent the metal bottom portion 2B from coming into contact with the ground, thereby preventing scratches or the like from being caused by contact with the ground.

The male threaded body 43 for pushing up the medium container is screwed into the female threaded ring body 38 from above, is rotated from the outside from below through the operation recess 45 on the lower end surface, and is pushed up from the bottom of the medium container 47 by the upper end latch opening 46. is pushed up, and the inner container 47 is elastically clamped and held between the bottom end of the hanging wall 14 and the lower end of the hanging wall 14 via the packing 48. 49
52 is a heat insulating material, and 52 is a protrusion that prevents the female threaded ring body 38 from coming off downward.

The engagement protrusion 42 does not have to be continuous in an annular shape as shown in the figure, and can be a mere partial protrusion. Further, although the mere inner circumference of the lowermost surface portion 36 may be elastically engaged with the engagement protrusion 42, by forming the bent edge 50 as shown in the figure, the protrusion 4
The elasticity in engagement with 2 is increased to improve the workability of fitting. The workability can be further improved by forming one or several cuts from the inner periphery of the bent edge 50.

In the case shown in FIGS. 3 to 5, an upright peripheral wall 61 is formed on the inner periphery of the lowermost surface portion 36 of the metal bottom portion 2B, and an engaging protrusion 62 is provided on the inner periphery of the upper end portion of the peripheral wall 61.
On the other hand, the outer periphery of the female threaded ring body 38 includes an abutment flange 63 that abuts the upper end of the peripheral wall 61;
An engaging protrusion 64 located below is formed. As a result, the female threaded ring body 38
4 is elastically engaged with the protrusion 62 of the upright peripheral wall 61 from above, and the flange 63 is fitted into the bottom part 2B with the flange 63 pressed against the upper end of the peripheral wall 61. flange 63
The surface that is crimped onto the upper end of the peripheral wall 61 has a rotation preventing protrusion 66 that engages with the notch 65 at the upper end of the peripheral wall 61, thereby preventing the bottom portion 2B and the internally threaded ring body 38 from rotating. 67 is an annular leg formed on the lowermost surface portion 36.

6 and 7 show an elastic projection located above the lower end abutting flange 41 and engaged with the inner periphery of the lowermost surface portion 36 of the annular leg 40 as shown in FIG. The piece 71 is formed by a gate-shaped cutout 72, so that the internally threaded ring body 38 can be elastically fitted without requiring elasticity on the inner peripheral side of the lowermost surface portion 36. Although a short upright peripheral wall 73 is formed on the inner periphery of the lowermost surface portion 36 to engage with the projecting piece 71, this is not particularly necessary.

The one in FIGS. 8 to 10 is a female threaded ring body 38.
Abutment flange 8 on the outer periphery of the lowermost surface portion 36
1 and an engagement piece 83 that forms an inner flange engagement gap 82 between the abutting surface of the flange 81 and the lowermost surface portion 36.
After the engagement piece 83 is engaged from the flange contact surface side of the lowermost surface section 36 to the non-contact surface side through the notch 84 formed on the inner periphery of the lowermost surface section 36, by rotation. The engagement piece 83 elastically overcomes and engages the engagement protrusion 84 on the non-contact surface side of the inner flange 36, and with the flange 81 crimped to the lowermost surface 36, the female threaded ring body 38 is attached to the bottom. It is elastically fitted to 2B.

This elastic fitting is achieved by movement of the internally threaded ring body 38 in two directions, and the holding performance of the fitting is improved accordingly. Further, a rotation restricting protrusion 85 for the engagement piece 83 is also formed on the non-contact surface of the lowermost surface portion 36, and includes the engagement protrusion 84 and prevents rotation between the bottom portion 2B and the female threaded ring body 38. It is used for both purposes. The flange 81 and the engaging piece 83 may be arranged upside down, in which case each of the protrusions 84 and 85 also aligns with the lowermost surface portion 36.
form on the opposite side.

The bottom of the metal body of the outer case is wrapped around inside the body diameter of the middle container to form a bottom opening of the metal body, and the female threaded ring body for pushing up the middle container and attaching the male thread is directly inserted into this bottom opening. Since it is fitted, it is possible to form the metal bottom of the body all the way to the lowest surface, and the internally threaded ring body can be directly fitted onto it, making the structure simple without the need for separate members. Since the (bottom plate) is not visible on the side surface, the appearance of the thermos can be simplified.

In addition, the bottom opening is formed smaller than the body diameter of the inner container, so even if the female thread ring should come off,
The inner container will not fall out, ensuring safety during the assembly process and during use.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a thermos bottle showing one embodiment, Fig. 2 is an exploded perspective view of the main parts, Fig. 3 is a sectional view of the main parts of another embodiment, Fig. 4 is a partially enlarged sectional view, 5 is a partially enlarged front view, FIG. 6 is a cross-sectional view of a main part of another embodiment, FIG. 7 is a partial front view, FIG. 8 is a cross-sectional view of a main part of another embodiment, and FIG. The figure is a partially plan view, and FIG. 10 is a partially enlarged longitudinal sectional front view. 1...Thermos flask, 2...Exterior case, {2A...
Side part, 2B...bottom} (metal body), 38...female threaded ring body, 41...abutment flange, 42...engaging protrusion, 43...middle container push-up male threaded body, 47...
...middle container, 30... anti-rotation protrusion, 51... small hole, 50... bent edge, 61... upright peripheral wall, 62...
...Engaging protrusion, 63...Abutting flange, 64...Engaging protrusion, 65...Notch, 66...Stopping protrusion, 71...Elastic protrusion, 73...Upright peripheral wall, 81
...Abutting flange, 82...Inner flange engagement gap, 83
... Engaging piece, 84 ... Notch, 85 ... Rotation regulating protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The bottom of the metal body of the outer case is wrapped around inside the body diameter of the inner container to form a bottom opening of the metal body, and in this bottom opening, A bottom device for a pot such as a thermos flask, characterized in that a female threaded ring for a male threaded screw for pushing up an inner container inside an outer case is directly fitted therein. (2) The bottom device of a pot such as a thermos flask as set forth in claim 1 of the utility model registration claim, wherein the female thread ring is made of synthetic resin. (3) The internally threaded ring body has a flange that contacts the lower surface of the inner flange formed at the lower end of the lowermost surface of the metal body, and an engagement protrusion located above the abutment flange. A pot such as a thermos flask according to claim 2 of the utility model registration claim, wherein the engaging protrusion is elastically engaged with the inner periphery from below, and the abutting flange is held in a state in contact with the lower surface of the inner flange. Bottom device. (4) The inner periphery of the lowermost surface of the metal body that engages with the engagement protrusion is a bent edge that faces upward and slopes slightly inward.Claim 3 of Utility Model Registration
The bottom device for pots such as thermos flasks as described in section. (5) The bottom device of a pot such as a thermos flask as set forth in claim 4 of the utility model registration claim, wherein the folded edge is formed with cuts from the inner periphery at one or several places. (6) The internally threaded ring body has an abutment flange formed on the lower end of the lowermost surface of the metal barrel and an engagement protrusion located below the abutment flange, and the inner flange Utility model registration claim 2, in which the engagement protrusion is elastically engaged with the inner periphery from above and the abutment flange is held in a state of contact with the inner flange.
The bottom device for pots such as thermos flasks as described in section. (7) The bottom of a pot such as a thermos flask as set forth in claim 6 of the utility model registration claim, wherein the engaging portion of the inner flange with the engaging protrusion is an engaging ridge formed on the inner cylindrical portion of the inner flange. Device. (8) The bottom device for a pot such as a thermos flask as set forth in any one of claims 1 to 7 of the scope of the utility model registration claim, wherein a rotation preventing means is provided between the bottom and the female thread ring. (9) The internally threaded ring body has an inner flange formed at the lower end of the lowermost surface of the metal body between the flange that abuts the upper or lower surface of the inner flange and the surface of the flange that abuts the inner flange. It has an engagement piece that forms an engagement gap, and engages from the engagement piece and a notch formed on the inner periphery of the inner flange from the contact surface side with the contact flange of the inner flange to the non-contact surface side. After the engagement piece is rotated, the engaging piece elastically overcomes the engaging protrusion on the non-contact surface side and engages the inner flange, and the abutting flange is held in contact with the inner flange. A bottom device for a pot such as a thermos flask according to claim 1 of the utility model registration claim.