JPH01130084U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の実施例の弁装置の部分破断側
面図、第２図は第１図に於ける―線方向断面
図、第３図、第４図、第５図及び第６図は同実施
例の弁装置の作用を説明するための要部の側断面
図であり、第７図は従来例の弁装置を用いた排気
装置の概略側面図である。 なお図において、２５，４４……シリンダ装置
、３９……第１弁体、４６……第２弁体。 FIG. 1 is a partially cutaway side view of a valve device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view along the line in FIG. 1, and FIGS. 3, 4, 5, and 6 are FIG. 7 is a side sectional view of a main part for explaining the operation of the valve device of the same embodiment, and FIG. 7 is a schematic side view of an exhaust device using the conventional valve device. In the figure, 25, 44... cylinder device, 39... first valve body, 46... second valve body.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 排気系に連通する第１開口及び被減圧室に連通
する第２開口を有するケーシングと、前記第１開
口端部、又は第２開口端部に形成された第１弁座
と、該第１弁座に着座可能な第１弁体と、該第１
弁体に形成され常時、前記排気系及び被減圧室の
一方に連通する通孔と、前記第１弁体の前記通孔
の前記第１弁座とは反対側の開口端部に形成され
る第２弁座と、該第２弁座に着座可能な第２弁体
と、前記第１弁体を前記第１弁座に着座させる第
１位置及び前記第１弁座から離座させる第２位置
に、該第１弁体を駆動可能な第１駆動機構と、前
記第２弁体を前記第２弁座に着座させる第３位置
及び前記第２弁座から離座させる第４位置に、該
第２弁体を駆動可能な第２駆動機構と、から成り
、前記第１、第２弁体を前記第１、第２弁座にそ
れぞれ着座させた状態では前記第１開口と第２開
口との連通を遮断し、前記第１弁体を前記第１弁
座に着座させたまゝで前記第２駆動機構を作動さ
せ、前記第２弁体を前記第４位置に駆動したとき
には、前記通孔を介して前記第１開口と第２開口
とを連通させる小さな流路断面積を得るようにし
、前記第１駆動機構により更に前記第１弁体を第
２の位置に駆動したときには前記第１開口と第２
開口とを連通させる大きな流路断面積を得るよう
にしたことを特徴とする弁装置。 a casing having a first opening communicating with an exhaust system and a second opening communicating with a depressurized chamber; a first valve seat formed at the first opening end or the second opening end; and the first valve. a first valve body that can be seated on a seat;
a through hole formed in the valve body and always communicating with one of the exhaust system and the depressurized chamber; and a through hole formed in the opening end of the through hole of the first valve body on the opposite side from the first valve seat. a second valve seat, a second valve body that can be seated on the second valve seat, a first position where the first valve body is seated on the first valve seat, and a second position where the first valve body is seated off the first valve seat. a first drive mechanism capable of driving the first valve body; a third position where the second valve body is seated on the second valve seat; and a fourth position where the second valve body is seated off the second valve seat; a second drive mechanism capable of driving the second valve body, and when the first and second valve bodies are seated on the first and second valve seats, respectively, the first opening and the second opening When the second drive mechanism is operated with the first valve body seated on the first valve seat and the second valve body is driven to the fourth position, the communication with A small flow passage cross-sectional area is obtained to communicate the first opening and the second opening through the hole, and when the first driving mechanism further drives the first valve body to the second position, the first valve body is moved to the second position. opening and second
A valve device characterized by having a large flow passage cross-sectional area communicating with an opening.