JPS637164Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vacuum double bottle used as an inner bottle for magic bottles, particularly portable magic bottles.

FIG. 1 shows a vacuum double bottle used for a conventional portable magic bottle, and the vacuum double bottle A consists of an inner bottle 1 and an outer bottle 2.
The upper ends of the outer bottle 2 and the outer bottle 2 are connected to each other at a connecting part 3, and a tip tube 4 is formed at the bottom of the outer bottle 2.

An asbestos mat 5 as a support member is interposed between the bottoms of the inner bottle 1 and the outer bottle 2, and the asbestos mat 5 maintains a constant distance between the inner bottle 1 and the outer bottle 2, and Bottle 1 and outer bottle 2
They support each other so that they do not move.

However, in the conventional magic bottle, the asbestos mat 5 is interposed between the bottoms of the inner bottle 1 and the outer bottle 2, and mainly supports both in the vertical direction. Therefore, its reinforcing effect is small,
Vacuum double bottle A often broke.

That is, in the vacuum double bottle A, a temperature difference often occurs between the inner bottle 1 and the outer bottle 2 during the manufacturing process or during use. For example, during the process of manufacturing vacuum double bottle A, in the process of creating a vacuum between inner bottle 1 and outer bottle 2 and melting tip tube 4, the double bottle is heated to about 250°C and suction is applied. It is then melted and then left to cool in the air.
When left to cool, the outer bottle cools rapidly, but the cooling rate of the inner bottle is slow, and there is a temporary gap between the outer bottle and the inner bottle.
A temperature difference of about 250℃ occurs. Further, when hot water is used in a vacuum double bottle, a temperature difference of 80 to 100° C. occurs between the inner bottle 1 and the outer bottle 2.

The thermal expansion coefficient of glass used for vacuum double bottles is approximately 5.5×10 ^-6 , but if the length of the vacuum double bottle is 25 cm and the temperature difference is 250°C, the inner bottle 1 and outer bottle The length expansion/contraction with 2 is 0.34mm
As a result, a large concentrated stress is applied to the portion of the outer bottle 2 in contact with the asbestos mat 5, which is broken through by the asbestos mat 5 and breaks the vacuum double bottle.

Also, the vacuum double bottle is supported against the exterior body inside the magic bottle, but all of that support is supported by the outer bottle 2, and the inner bottle 1 is supported by the outer bottle 2.
It is merely supported by the connecting portion 3 and the asbestos mat 5. However, the asbestos mat 5 is bonded to the inner bottle 1 and housed in the outer bottle 2 during the manufacturing process of the vacuum double bottle, but due to manufacturing reasons, there is a gap between the asbestos mat 5 and the outer bottle 2. It is unavoidable that a gap of about 0.1 mm will occur. Therefore, in the product, the inner bottle 1 is supported by the outer bottle 2 only at the connection part 3, and in fact, the inner bottle 1
is suspended within the outer bottle 2 by the connecting portion 3.

Therefore, if the magic bottle is tipped over when it is full of water, or if it is swung like a pendulum by the hanging string and hit against a wall, etc., the inner bottle 1 will be supported by the connecting part 3 inside the outer bottle 2. It will swing like a pendulum. Therefore, concentrated stress acts on the connecting portion 3, causing the connecting portion 3 to crack and the vacuum double bottle to be damaged. Even if the asbestos mat 5 is interposed between the inner bottle 1 and the outer bottle 2, there is a slight gap between the asbestos mat 5 and the outer bottle 2 as described above, and the pendulum movement of the inner bottle 1 is prevented. There is almost no resistance to this.

The present invention has been developed in consideration of the above circumstances, and is designed to prevent damage due to the temperature difference between the inner bottle 1 and the outer bottle 2, and to prevent the magic bottle from falling over or being hit in a pendulum shape. The purpose of this invention is to provide a new vacuum double bottle with high strength.

Therefore, the present invention forms conical surfaces parallel to each other and having an angle of 15 to 45 degrees with respect to the central axis of the bottle at the bottom of each of the inner and outer bottles, and provides support between the conical surfaces. It is characterized by interposing a member.

FIG. 3 shows the structure of the bottom of an embodiment of the vacuum double bottle of the present invention. In this embodiment, conical surfaces 6 and 7 that are parallel to each other are formed on the outer peripheral portions of the bottoms of the inner bottle 1 and the outer bottle 2.
The conical surfaces 6 and 7 in this embodiment are formed at an angle of 30 degrees with respect to the central axis of the vacuum double bottle. Asbestos pine 5 is interposed.

The angle of the conical surfaces 6 and 7 is not limited to the above-mentioned 30 degrees, but may be in the range of 15 to 45 degrees. The most suitable angle is between 25 and 35 degrees. Further, the most appropriate position for forming the conical surfaces 6, 7 in the inner bottle 1 and the outer bottle 2 is at the outer circumferential portion of the bottom as in the embodiment, but it may be located closer to the center.

According to the present invention, when a temperature difference occurs between the inner bottle 1 and the outer bottle 2, the direction of expansion and contraction of the inner bottle 1 with respect to the outer bottle 2 and the asbestos mat 5
Since the angle formed between the asbestos mat 5 and the conical surface 7 of the outer bottle 2 is small, slippage occurs between the front surface of the asbestos mat 5 and the conical surface 7 of the outer bottle 2, allowing the bottle to expand and contract. Therefore, due to thermal expansion and contraction due to the temperature difference between the inner bottle 1 and the outer bottle 2, the asbestos mat 5 is
Since there is no strong pressure between the two, the vacuum double bottle will not be damaged.

In addition, if the magic bottle falls over or is hit in a pendulum shape while using the magic bottle, please check the direction of vibration of the inner bottle 1 in the vacuum double bottle and the top of the asbestos mat 5. Since the angle between the asbestos mat 5 and the conical surface 7 of the outer bottle 2 is large, there will be no slippage between the asbestos mat 5 and the conical surface 7 of the outer bottle 2, and the asbestos mat 5 will effectively support the vibrations of the inner bottle 1, preventing excessive damage to the connection part 3. This prevents the application of concentrated stress.

Therefore, the vacuum double bottle of the present invention has high strength and will not break during its manufacturing process and during use as a bottle, has a high product yield, is highly durable, and can be used for a long period of time. It can be used across the board.

In order to confirm the effectiveness of the vacuum double bottle of this invention,
Various comparative tests were conducted on the vacuum double bottle of the present invention and the conventional vacuum double bottle. The angle of conical surfaces 6 and 7 in the vacuum double bottle of the present invention was 30 degrees.

Insert the heater into the vacuum double bottle and open the inner bottle 1.
When we investigated the resistance of the vacuum double bottle to temperature differences by heating only
Many bottles cracked at 300°C, but the vacuum double bottle of the present invention did not break even at 300°C.

In a test in which a vacuum bottle is filled with water and turned in any direction to check for damage to the vacuum double layer bottle, many conventional vacuum double layer bottles broke after being turned over 20 to 30 times. However, in a test of 10 products of the vacuum double layer bottle of this invention, not a single one broke even after being turned over 40 times.

In a test to check whether a vacuum double bottle is damaged or not, a magic bottle filled with water is hung on a string, tilted at a predetermined angle, then swung like a pendulum and hit against a wall. Many of the bottles broke when shaken at an angle of 30 to 50 degrees, but the vacuum double bottle of the present invention was able to withstand angles of 50 to 70 degrees.

In a test to check whether the vacuum double bottle is damaged by placing the magic bottle on an inclined table and sliding it from a predetermined height and hitting the bottom, it was found that when a conventional vacuum double bottle was used. In many cases, vacuum double bottles broke when slid from a height of 2 m, but when using the vacuum double bottle of the present invention, it broke when slid from a height of 2.5 m. But it wasn't damaged.

In addition, in a test in which a gift bottle supported vertically was dropped from a predetermined height onto the floor, the gift value of a gift bottle using a conventional vacuum double bottle was 0.8~
It was damaged when dropped from a height of 1.0m, but
The magic bottle using the vacuum double bottle of the present invention did not break even when dropped from a height of 1.0 to 1.2 m.

In addition, in the conventional vacuum double bottle, as shown by the chain line in FIG. However, when the asbestos mat 5 is bonded to the bottom of the inner bottle 1 in the vacuum double bottle manufacturing process, the asbestos mat 5 protrudes from the outer periphery of the inner bottle 1. This is not preferable since it becomes difficult to cover the outer bottle 2 afterwards.

In addition, since the curvature of the bottom of the inner bottle 1 and the outer bottle 2 is relatively large, it is difficult for the asbestos mat 5 having a flat surface to adhere closely to the area. Therefore,
On the contrary, stress may be concentrated, which is not preferable.

[Brief explanation of drawings]

FIG. 1 is a central vertical cross-sectional view of a conventional vacuum double bottle, and FIG. 2 is an enlarged central vertical cross-sectional view of its lower part. FIG. 3 is an enlarged central vertical cross-sectional view of the lower part of the vacuum double bottle of the present invention. 1... Inner bottle, 2... Outer bottle, 5... Asbestos mat (supporting member), 6... Conical part of inner bottle,
7... Conical part of the outer bottle.

Claims (1)

[Scope of utility model claims] A conical surface parallel to each other having an angle of 15 to 45 degrees with respect to the central axis of the bottle is formed at the bottom of each of the inner and outer bottles, and a support member is interposed between the conical surfaces. Features: Vacuum double bottle.