JPS6125320Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention particularly relates to improvements in repeater casings used in communication lines. When communication lines, especially when the line length becomes long, repeaters are housed in housings and installed at appropriate intervals in order to compensate for attenuation of the communication level transmitted, and are installed mainly in underground manholes. In this case, the casing is constructed so that it can be opened and closed for security checks as well as during installation, but it is also required to be sealed at a pressure higher than the outside pressure in order to maintain the functionality of the internal repeater. According to the specifications of Nippon Telegraph and Telephone Public Corporation, the voltage inside the communication cable is set at 1.65.

In order to meet this requirement, conventional repeater casings are formed into a predetermined shape by welding sturdy iron materials, and the attachment of the tightening fittings necessary for opening and closing the cover plate, as well as eye bolts for lifting and hanging, etc., are also welded. It was done through work.

However, this conventional casing is heavy and inconvenient to handle, and the manufacturing cost is also relatively high.

Instead of forming the casing by welding iron materials, welding stainless steel materials would be suitable for mass production and would be lighter, but due to the nature of stainless steel materials, welding work (carbon is easily precipitated and corroded) is required. This makes it difficult to install the tightening fittings necessary for opening and closing.

The purpose of the present invention is to solve this problem, and the object is to consist of two stainless steel aperture parts whose opposing peripheral ends are L-shaped flanges in cross-section, with approximately L-shaped sections formed in the flange at the four corners. The letter-shaped presser metal fitting is fixed, and the upper and lower parts of the metal fitting are connected to the presser plate and L.
This can be achieved by creating a structure in which the metal parts are tightened.

The gist of the present invention will be explained below with reference to the illustrated embodiments.

Fig. 1 shows each part of the casing according to the present invention in an exploded perspective view for ease of understanding. It is shown with a partial cross section.

In the figure, 1 and 2 are stainless steel plates (e.g.
The upper and lower casing portions have substantially the same shape, and are formed by a embossment process with a thickness of 2.5 mm), and opposing peripheral ends are formed into flanges 3 and 4 having an L-shaped cross section. Approximately L-shaped presser fittings 5, 5' are housed in the four corners of this flange, and are fixed, for example, with screws 6, 6' from the outer surface of the flange. The upper and lower parts 1 and 2 are made of synthetic rubber, such as nitrile rubber, and are adjacent to each other by narrowing gaskets 7, and upper and lower L-shaped metal fittings 8 of metal fittings 5 and 5' at the four corners are arranged.
and the end of the presser plate 10 attached to the end of the hardware 8 by the screw 9, and are tightly integrated by tightening the screw 9 while compressing the gasket 7.

At this time, if you fix the lower angle 5' to the flange 4 with the screw 6' and also fix it to the tip of the L-shaped metal fitting 8 with the screw 11, loosen the screw 9, rotate the holding plate laterally, and remove the upper housing. There is no fear that both the presser plate 10 and the L-shaped hardware 8 will fall off when it is removed, and it is convenient when tightening it again. In addition, the screw hole 1 of the L-shaped metal fitting provided for the tightening screw 9 of the holding plate 10 is
By making 2 a through screw hole, if necessary, a required number of eye bolts 13 can be attached to the hole and used for hanging (with the casing placed horizontally). The circular holes 14 on the bottom surface of the lower casing 2 are cable receiving holes (two on the left and right), and the cables drawn into these holes are also hermetically accommodated by another means.

As explained above, the repeater casing according to the present invention does not use any welding process, even when molded with stainless steel pattern, which is inexpensive and mass-produced.
It is possible to form a sealed structure that can be easily opened and closed, and its practical effects are remarkable in combination with economical effects.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of various parts of the casing according to the present invention, and FIG. 2 is a partially sectional side view of the four corner sealing parts. In the figure, 1 and 2 are the upper and lower casings, 3 and 4 are flanges around the end face, 5 and 5' are holding metal fittings, 7 is a gasket, 8 is an L-shaped metal fitting, and 9 is a screw for tightening the holding plate 10. .

Claims (1)

[Scope of utility model registration request] It consists of two stainless steel aperture parts whose peripheral ends facing each other are L-shaped flanges in cross section, and approximately L-shaped presser metal fittings are fixed or inserted into the flanges at the four corners, and the upper and lower sides of the metal fittings are fixed or inserted into the flanges. A repeater casing used especially for communication lines, characterized by being tightened with a holding plate and L-shaped metal fittings.