JPH0454444Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a measuring jig used for measuring gas permeability of a container in a gas permeability measuring device.

2. Description of the Related Art In plastic containers, etc., it is important to measure the amount of oxygen permeation through the container wall, and measuring instruments for this purpose are known. As shown in FIG. 2, the conventional measuring device has a measuring device main body 1 and a measuring jig 4 that can be attached to and detached from the measuring device main body 1, and the measuring device main body 1 has a carrier gas supply port 2 and an intake port 3. . The measuring jig 4 is fixed to a container mounting plate 6 for mounting the container 5 through the container mounting plate 6, and has one end removably connected to the supply port 2 and intake port 3 of the measuring instrument body 1, respectively. two pipes 7 that serve as attachment parts,
It has 8. When measuring oxygen permeation in a container, as shown in FIG.
The container 5 is connected to the container mounting plate 6 so that the pipes 7 and 8 are connected to the intake port 3 and the pipes 7 and 8 are inserted into the container 5.
Fixed to. In this state, a carrier gas such as nitrogen gas is supplied into the container through the supply port 2 and the pipe 7, and the oxygen that has permeated into the container is sent together with the carrier gas into the measuring instrument body 1 through the pipe 8 and the intake port 3. Measure the oxygen concentration in the gas.

Problems to be Solved by the Invention However, in the conventional measuring jig 4 mentioned above, the portions where the pipes 7 and 8 rise from the mounting portions were not flexible, so the distance between the mounting portions of both pipes was not accurate. The distance between the supply port 2 and the intake port 3 of the measuring device body 1 had to match. Otherwise, the mounting part will not fit perfectly into the supply port and intake port, and air will get mixed in from the surroundings, making accurate measurement impossible. Furthermore, the occurrence of deformation of the attachment portion due to repeated attachment and detachment is unavoidable. This also causes measurement errors, and in severe cases, the jig may be damaged.

The object of the present invention is to provide a measuring jig that eliminates the drawbacks of conventional jigs as described above.

Means for Solving the Problems The present invention solves the above-mentioned conventional problems by imparting flexibility to the portions rising from the mounting portions of each pipe. More specifically, a spiral portion is formed between the mounting portion of each pipe and the container mounting plate to provide flexibility.

Function and Effects of the Invention If a jig in which flexibility is imparted by forming a spiral portion between the mounting part of each pipe and the container mounting plate is used as in the present invention, the lower end of each pipe of the jig can be Even after repeated use, the mounting part and the supply port and intake port of the measuring instrument body always fit perfectly, enabling accurate measurements. Therefore, the reproducibility of measured values is improved compared to conventional jigs. In addition, the jig of this invention has flexibility in the part that rises from the mounting part, so
It can absorb the strain caused by repeated attachment and detachment. Therefore, durability is significantly improved compared to conventional jigs.

Embodiment Hereinafter, a preferred embodiment of the present invention shown in FIG. 1 will be described.

The measurement jig 4 includes a container mounting plate 6 on which the container 5 is attached.
and metal pipes 7 and 8 for supplying carrier gas to the container and taking it out. Container mounting plate 6
Although it is preferable to use an acrylic resin plate from the viewpoint of workability, the plate is not limited to this, and may be made of metal, for example.

The lower ends 7A and 8A of the metal pipes 7 and 8 are connected to the carrier gas supply port and intake port (second
(see figure), and above it there are straight parts 7B, 8B and spiral parts 7C,
8C is formed. The straight parts 7B and 8B need only be long enough to attach a mounting bracket (for example, a swage lock), but preferably 25 mm or more. This is because metal pipes can be reused.
Copper is preferred for its flexibility, but is not limited to this.

The joints between the container mounting plate 6 and the metal pipes 7 and 8 (the area shown by the shaded area 11 in Figure 1) must be completely caulked with epoxy resin, etc., and sufficient care must be taken to prevent air from entering the container. Must be.

In the jig 4 having the above configuration, each of the pipes 7 and 8 has a spiral portion, so it is flexible and can be mounted by accurately fitting the mounting portion at the lower end of the pipe into the supply port and intake port of the measuring instrument body. Moreover, even after repeated use, the accuracy of fitting does not decrease much, and good gas permeability can be measured.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a preferred embodiment of the present invention;
FIG. 2 is a perspective view showing a state in which a conventional measuring jig is attached to a measuring instrument body. 1... Measuring instrument body, 2... Supply port, 3... Intake port, 4... Measurement jig, 5... Container, 6... Container mounting plate, 7, 8... Pipe, 7A, 8A... ...Mounting part, 7B, 8B... Straight part, 7C, 8C... Spiral part, 9, 10... Mounting bracket.

Claims (1)

[Scope of utility model registration request] A tool for measuring gas permeability of a container, consisting of a container mounting plate, and two pipes that are fixed through the container mounting plate and serve as attachment parts with one end removably connected to the main body of the gas permeability meter. A jig for measuring gas permeability of a container, characterized in that the pipe has a spiral portion between the mounting portion and the container mounting plate.