JPH0228846Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention consists of an inner container and an outer container, and the space formed between the two containers is evacuated through a chip tube to create a vacuum. This invention relates to a chip tube protection cover for protecting a chip tube in a vacuum double container.

(Prior Art) A metal vacuum double container has been put into practical use with a structure in which the vacuum is evacuated through a copper tip tube, and then the tip of the tip tube is pressed and sealed. In this type of metal vacuum double container, even a slight external force applied to the tip of the tip tube can cause the joint to break, or the tip can be corroded by moisture, causing vacuum leaks. The problem was that it was easy to occur. For this reason, in conventional vacuum double containers, the tip tube is covered with a rubber cover or cushion packing.

(Problem that the invention aims to solve) However, although rubber covers and cushion pads can prevent corrosion due to moisture, they cannot sufficiently protect the chip tube from external forces, and vacuum After forming the double container and before completing the assembly as a product, there was a problem in that vacuum leakage occurred from the joint at the tip of the tip tube even if the product was subjected to even a slight external force.

(Means for Solving the Problem) As a means for solving the problem, the present invention uses a hard material as the material of the chip tube protection cover 10 for vacuum double container, as shown in the figure, and The protective cover 10 is formed into a bottomed cylindrical shape having a flange portion on the open end side, and extends from the cylindrical inner wall surface toward its center line, so that its inner end portion is fixed when attached to a chip tube. , a plurality of positioning ribs are provided that come into contact with parts other than the tip of the tip tube.

In an embodiment of the present invention, the plurality of positioning ribs are formed such that their inner ends face each other, and the distance between the opposing ribs is formed to be slightly larger than the diameter of the tip tube. In this case, it is preferable that the ribs be formed so that they are gradually extended from the middle so that the distance between the inner ends of the opposing ribs on the bottom side is approximately the same as or slightly smaller than the diameter of the tip tube. Therefore, regardless of whether the number of positioning ribs is even or odd, the diameter of the circle touching the upper side of the inner end of each rib is approximately the same as or slightly larger than the diameter of the tip tube. Needless to say.

(Function) The chip-to-chip protective cover for a vacuum double container according to the present invention can be used when attaching the protective cover to the vacuum double container.
The plurality of positioning ribs contact the cylindrical part and bent part of the tip tube, which are stronger than the tip, and automatically position the two, and at the same time, the inner wall surface and ribs of the protective cover It also prevents the inner wall surface of the protective cover from coming into contact with the tip of the tip tube even if an external force is applied to the protective cover after it is attached to the bottom of the vacuum double container. This serves to prevent external force from being applied to the tip of the tip tube. Furthermore, by forming the protective cover into a cylindrical shape with a bottom, the tip tube is isolated from the outside air and corrosion of the tip by moisture is prevented.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Example) Fig. 1 shows an example in which the chip tube protection cover for a vacuum double container according to the present invention is applied to a launcher. It is composed of a vacuum insulated double container 2, an exterior body body 3 that houses the double container 2, and a shoulder body 4 that is forcibly fitted to the outer periphery of the open end side of the body 3. 5 is detachably attached.

The vacuum double container 2 is composed of an inner container 6 and an outer container 7, and the space 9 formed between the two containers is vacuum evacuated via a copper tip tube 8 brazed to the bottom of the outer container 7. The chip tube 8 is surrounded by a chip tube protective cover 10.
is being worn.

The chip tube protection cover 10 according to the present invention is made of a hard material, for example, a transparent synthetic resin, and has a bottomed cylindrical shape, and has an adhesive flange 11 formed on the open end side, and a cylindrical side wall. Four positioning ribs 12 are formed facing each other on the inner surface of 13 and extend toward the center line thereof. These positioning ribs 12 center and position the tip tube protective cover 10 with respect to the tip tube. The tip tube protection cover 10 has a depth slightly larger than the length of the tip tube 8 and a bottom portion 14.
is formed to have an inner diameter larger than the size of the tip end 8a of the tip tube, while the free ends of the opposing ribs 12,
In other words, the inner end is free from the middle so that the gap between the open ends is slightly larger than the diameter of the tip tube 8, and the gap between the bottom sides is approximately the same as or slightly smaller than the diameter of the tip tube 8. The end side is formed so as to gradually bulge inward, and even if the protective cover 10 is subjected to an external force, the inner end of the rib will come into contact with the relatively strong cylindrical part and bent part of the tip tube, and the protective cover The inner wall of the tip 8a of the tip tube 8 is
It is designed so that it does not come into contact with the

If the tip tube protection cover 10 is made of a transparent material, the inside can be seen through, so that it is possible to prevent the tip tube protection cover from coming into contact with the tip end 8a of the tip tube during installation.

When installing the tip tube protection cover 10 according to this invention, adhesive is applied to the flange portion 11, and the tip portion 8a of the tip tube is positioned between adjacent ribs 12, and the protective cover 10 is attached to the tip tube. 8 and adhere it to the bottom wall of the vacuum double container 2. In this case, when the tip tube protective cover 10 is placed so that the tip end 8a of the tip tube is located between the adjacent ribs 12 and is placed over the tip tube 8, the center line of the tip tube 8 and the protective cover 10 are aligned. Even if the center line is slightly deviated from the center line, the inner end of the rib 12 contacts the bent part 8b of the tip tube and the cylindrical part connecting the tip part 8a of the tip tube and its cylindrical part, and is guided by them. Since it slides along the cylindrical portion of the tip tube 8, the centering and positioning of the protective cover 10 with respect to the tip tube 8 is automatically performed, and the distance between the tip end 8a of the tip tube and the inner wall surface of the protective cover 10 is automatically performed. The interval is maintained appropriately, and the protective cover 10 is installed at a predetermined position without coming into contact with the tip 8a of the tip tube 8 during installation. Furthermore, even when a force is applied to the protective cover 10 to rotate around the tip tube, the bent portion 8b of the tip tube protrudes outward from the cylindrical portion and is thicker than the distal end portion 8a. Therefore, the protective cover 10 is prevented from rotating and its ribs 12 are also prevented from coming into contact with the tip 8a of the tip.

In addition, even if the flange part of the protective cover is not glued to the bottom of the vacuum double container after it is attached to the bottom of the vacuum double container, the external force acting on the protective cover will be transferred to the strong chip tube through the ribs. The protective cover 10 is prevented from hitting the tip 8a of the tip tube, and therefore, external force is prevented from being applied to the tip of the tip tube. Moreover, since the protective cover 10 completely surrounds the tip tube 8 and its flange is bonded to the bottom of the double container with adhesive, the tip tube 8 is confined in a closed space and moisture does not adhere to it. Nor.

(Effects of the invention) As is clear from the above explanation, according to the invention, the chip tube is surrounded by a bottomed cylindrical tip tube protection cover made of a hard material, so that the tip tube is protected from external force. It is possible to prevent damage caused by direct contact with the tip, and at the same time, it is possible to prevent corrosion due to moisture at the tip of the tip tube. In addition, the cylindrical inner wall surface of the protective cover is provided with a plurality of positioning ribs that extend radially from the inner wall surface toward the center line and that can come into contact with parts other than the tip of the tip tube. When attaching the protective cover to the vacuum double container, simply place the protective cover so that the tip of the tip tube is located between the ribs of the protective cover, and the ribs will help center and position the protective cover with respect to the tip tube. This is done automatically, and when the tip tube is slid along the protective cover, the distance between the two is also guaranteed by the rib that abuts against the cylindrical part of the tip tube, and after the protective cover is attached, the protective cover Even if an external force is applied to the tip, the ribs contact the cylindrical part and the bent part of the tip and prevent the protective cover from coming into contact with the tip of the tip, so the tip of the tip will not be damaged by external force. Excellent effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of a launcher to which the tip tube protection cover according to the present invention is applied, and Fig. 2 is a partially exploded perspective view showing the relationship between the tip tube and the tip tube protection cover in the launcher of Fig. 1. It is. 1...Container body, 2...Vacuum insulation double container, 3
...Exterior body body, 4...Shoulder body, 5...Lid, 6...
Inner container, 7...Outer container, 8...Tip tube, 8
a... Tip portion of the tip tube, 8b... Bent portion of the tip tube, 10... Chip tube protective cover, 11... Flange portion, 12... Positioning rib, 14... Bottom portion.

Claims (1)

[Claims for Utility Model Registration] (1) It is made of a hard material, has a bottomed cylindrical shape with a flange on the open end side, and extends from the inner wall surface of the cylindrical shape toward its center line. 1. A chip tube protective cover for a vacuum double container, wherein the inner end portion has a plurality of positioning ribs that come into contact with a portion other than the tip of the tip tube when the tip tube is attached to the tip tube. (2) The plurality of positioning ribs are formed such that their inner ends face each other, and the distance between the opposing ribs is formed to be slightly larger than the diameter of the tip tube. Chip tube protection cover for vacuum double container as described. (3) The tip tube protective cover for a vacuum double container according to claim 2, wherein the distance between the opposing ribs on the bottom side is approximately equal to or slightly smaller than the diameter of the tip tube.