JPS64199Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a thermos bottle, and in particular to a bottle bottom tightening structure for a thermos bottle containing a so-called side-tip type inner bottle in which a degassing tip remains at a position eccentric from the center of the bottle bottom. It is.

As shown in FIGS. 1 and 2, the bottom tightening structure of a thermos bottle includes an annular bottom plate 2 that is screwed to the lower end of the body 1, and a tightening mechanism that is screwed to the inner periphery of the bottom plate 2. The upper end of the tightening body 3 is pressed against the protective cover 5 at the bottom of the inner bottle 4, thereby tightening the bottom of the bottle. In a thermos bottle with such a closing structure, when using the above-mentioned side tip type inner bottle 4, the tip 6 is placed on the bottom body 2, so the annular tip is inserted into the protective cover 5. A recess 7 is formed. However, if such a recess 7 extends onto the bottom body 2, it is not possible to provide radial reinforcing ribs on the top surface of the bottom body 2, and therefore it is difficult to make the strength of the bottom body 2 sufficiently large. I can't. As a result, the bottom body 2 becomes easily deformed during tightening or due to changes over time, resulting in a decrease in tightening torque and poor sealing between the bottle opening and the shoulder body.

Furthermore, in the conventional structure, the annular tightening wall 8 protruding from the tightening body 3 contacts the bottom of the bottle at only one point along the circular line. In the case of Bottle 4, there was also a problem in which the bottom of the bottle shifted when vibration was applied.

Therefore, the purpose of this invention is to provide a thermos bottle that uses a side tip type inner bottle, which can be provided with reinforcing ribs on the bottom body, and which reliably prevents the inner bottle from shifting. It is.

In order to solve the above-mentioned problems and achieve the above objectives, this invention has two concentrically protruding internal and external clamping walls on the upper surface of the clamping body, and a chip between both clamping walls. An insertion groove is formed, and the heights of both clamping walls are such that the inner clamping wall is in contact with the bottle bottom and the outer clamping wall has a slight clearance with the bottle bottom. The above-mentioned clearance is eliminated by the tightening torque at the final stage, and both tightening walls are pressed into contact with the bottom of the bottle.

Next, an embodiment of this invention will be described based on FIGS. 3 to 5.

In the thermos bottle of this embodiment, an annular bottom body 11 is screwed to the lower end of the body 10, and a tightening body 12 is screwed to the inner periphery of the bottom body 11, as in the conventional one.

The tightening body 12 has double tightening walls 13 and 14 concentrically formed around the center of its upper surface, and a tip insertion groove 15 is formed between them. The outer tightening wall 14 is the bottom protective cover 1 of the bottle.
The diameter of the inner tightening wall 13 is determined so that it is located outside the tip insertion recess 17 of No. 6, and the diameter of the inner tightening wall 13 is determined so that it is located inside the tip insertion recess 17.

In addition, the height of the inner and outer closing walls 13 and 14 is determined by the height of the inner closing wall 1 along the bottom of the inner bottle 18.
3 is formed lower than the outer tightening wall 14, and until the final tightening torque is applied, only the inner tightening wall 13 contacts the bottle bottom as shown in FIG. The outer tightening wall 14 has a small clearance Δx between it and the bottom of the bottle. Therefore, the tightening torque in such a state is determined by the frictional resistance of the inner tightening wall 13 and its radius of rotation.

When the final tightening torque is applied to the tightening body 12 from the above state, the inner tightening wall 13 is slightly deformed, and as a result of this deformation, the outer tightening wall 14 is pushed to the bottom of the bottle. Contact. Therefore,
Applying tightening torque with both tightening walls 13 and 14 in contact with the bottle bottom at the same time is only at the final stage of the tightening work.

In addition, the upper surface of the bottom body 11 is provided with an appropriate number of reinforcing ribs 19.
are provided in the radial direction. Others, 20 in the figure
21 is a tip, 21 is a rotating ring, and 22 is an engagement recess for tightening operation.

As mentioned above, this invention is based on a thermos bottle with a side tip type inner bottle, by concentrically protruding double inner and outer tightening walls having a radius corresponding to the eccentricity of the tip on the tightening body. Since a chip insertion groove is formed between the tightening walls, there is no problem with the rotation of the tightening body, and it is also possible to provide radial reinforcing ribs on the bottom body, increasing the strength of the bottom body. I can do it.

In addition, the double tightening walls formed on the tightening body, both inside and outside, are not always in contact with the bottom of the bottle, but are formed at such a height that only the inner tightening wall touches the bottom of the bottle from the beginning of the tightening operation until just before the end. Since it has been
The tightening torque may be less than when both are in contact all the time. In addition, in the final stage, both are tightened so that they come into contact with the bottom of the bottle, so even if a medium bottle with a large diameter is used, stable tightening can be performed.

[Brief explanation of the drawing]

Figure 1 is a partially omitted perspective view of a conventional thermos bottle.
Figure 2 is a partially omitted sectional view of the same as above, and Figures 3 to 5 are
The figure is a partially omitted sectional view of the embodiment. 10...Body part, 11...Bottom body, 12...Tightening body, 13, 14...Tightening wall, 15...Tip insertion groove, 18...Inner bottle, 19...Reinforcement rib, 20
... Chip.

Claims (1)

[Scope of utility model registration request] In a thermos bottle that accommodates a side-tip type inner bottle with a tip located eccentrically from the center of the bottom of the bottle, and tightens the inner bottle with a tightening body screwed into the inner periphery of the bottom, the tip is attached to the top surface of the tightening body. Double inner and outer tightening walls with a radius corresponding to the eccentricity of With the raised wall in contact with the bottom of the bottle, the outer tightening wall is set in a height relationship with a slight clearance from the bottom of the bottle, and the tightening torque in the final stage eliminates the above clearance and tightens both sides. A thermos bottle characterized by a wall that is pressed against the bottom of the bottle.