JPH0325559U

JPH0325559U -

Info

Publication number: JPH0325559U
Application number: JP8468789U
Authority: JP
Priority date: 1989-07-19
Filing date: 1989-07-19
Publication date: 1991-03-15

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す概略的な縦
断面図、第２図は第１図の要部の拡大斜視図、第
３図は第２図のＡ〜線に沿う断面図、第４図は作
用説明図、第５図は従来例の作用説明図である。１……ハウジング、４……シールブロツク、５
……デフレクタロール、６……シールロール、７
……シール壁、８……シール面、９……絞り片、
１０……膨張室、１１……排気口、１２……真空
ポンプ、１３……配管、１４……絞り弁。 FIG. 1 is a schematic vertical sectional view showing an embodiment of the invention, FIG. 2 is an enlarged perspective view of the main part of FIG. 1, and FIG. 3 is a sectional view taken along line A in FIG. 2. FIG. 4 is an explanatory diagram of the operation, and FIG. 5 is an explanatory diagram of the operation of a conventional example. 1...Housing, 4...Seal block, 5
... Deflector roll, 6 ... Seal roll, 7
... Seal wall, 8 ... Seal surface, 9 ... Aperture piece,
10... Expansion chamber, 11... Exhaust port, 12... Vacuum pump, 13... Piping, 14... Throttle valve.

Claims

[Claims for Utility Model Registration] (1) A seal block is disposed so as to face the deflector roll with a strip in between, and the outer peripheral surface of the deflector roll and the seal block wrapped around the seal block are provided on both sides of the seal block. A concave arc-shaped sealing surface when viewed from the side is formed in sliding contact with the strip, and the expansion chamber and the throttle piece that forms a minute gap between this sealing surface and the strip surface wrapped around the deflector roll are passed through the strip. A vacuum differential characterized in that the seal block is provided alternately and repeatedly so as to intersect at right angles to the direction, and an exhaust port opening at the bottom of each expansion chamber is formed in the seal block, and a vacuum pump is connected to the exhaust port. Pressure seal device. (2) The vacuum differential pressure sealing device according to claim (1), characterized in that the deflector roll is provided so as to be able to approach or separate from the seal block.