JPS61164482U

JPS61164482U -

Info

Publication number: JPS61164482U
Application number: JP4777985U
Authority: JP
Priority date: 1985-03-30
Filing date: 1985-03-30
Publication date: 1986-10-13

Description

[Brief explanation of drawings]

第１図は本考案に係るエア供給切換装置の一実
施例を示す要部断面図。第２図は動作状態を示す
要部断面図。第３図は従来例を示し、同図イは正
面要部断面図、同図ロは側面要部断面図。５，５ａ…ポンプヘツド、６，６ａ…ダイアフ
ラム、７…ポンプ軸、８…中間室、９…供給路、
１０，１０ａ…吸気口、１１，１１ａ…空気室、
１２…排気路、１７，１７ａ…係合用凹部、１８
…弁体、２０…ボール、２２…スプリング、２６
，２６ａ…スプリング。 FIG. 1 is a sectional view of essential parts showing an embodiment of an air supply switching device according to the present invention. FIG. 2 is a sectional view of main parts showing the operating state. FIG. 3 shows a conventional example, in which A is a sectional view of the main part from the front, and B is a sectional view of the main part from the side. 5, 5a... Pump head, 6, 6a... Diaphragm, 7... Pump shaft, 8... Intermediate chamber, 9... Supply path,
10, 10a...Intake port, 11, 11a...Air chamber,
12...Exhaust path, 17, 17a...Engagement recess, 18
...Valve body, 20...Ball, 22...Spring, 26
, 26a... Spring.

Claims

[Claims for Utility Model Registration] 1. Intake air communicated with air chambers 11, 11a of pump heads 7, 7a, each of which has diaphragms 6, 6a attached to both ends of a reciprocating pump shaft 7, respectively. The ports 10, 10a are provided to open into the intermediate chamber 8 which communicates the compressed air supply path 9 and the exhaust path 12, respectively.
A valve body 18 is provided in the intermediate chamber 8 so as to be able to reciprocate in the same direction as the pump shaft 7, for switching the supply direction of compressed air by alternately communicating the compressed air supply path 9 and the exhaust path 12, respectively. In an air supply switching device for an air-driven diaphragm pump, an engaging recess is provided on either the outer surface of the valve body 18 or the side of the intermediate chamber 8 in a direction along the reciprocating direction of the valve body 18. 17 and 17a are arranged in parallel, and the engaging member 20 is pressed by the elastic member 22 to fix the valve body 18 at the predetermined both end stop positions of the reciprocating movement of the valve body 18 on the other side. Engagement recess 17
, 17a so as to be freely engageable and detachable from the valve body 18.
is compressed on both sides of the pump shaft 7 during reciprocating motion to release the engagement between the engaging recesses 17, 17a and the engaging member 20, and urge the valve body 18 in the same direction as the operating direction of the pump shaft 7. An air supply switching device for an air-driven diaphragm pump, characterized in that it is provided with elastic members 26, 26a for pushing and pushing. 2. The air supply switching device for an air-driven diaphragm pump according to claim 1, wherein the engaging recesses 17, 17a are inverted conical holes formed on the outer surface of the valve body 18. 3. The air conditioner according to claim 1, wherein the engaging member 20 is a ball pressed by a spring housed in a hole 21 formed in the housing 19 forming the intermediate chamber 8. Air supply switching device for driven diaphragm pumps. 4. The air supply switching device for an air-driven diaphragm pump according to claim 1, wherein the elastic members 26, 26a are springs fitted onto the pump shaft 7.