JPS62119856U - - Google Patents

Description

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

第１図は本考案においてプランジヤが下降した
状態を示す縦断面図、第２図は同プランジヤが上
昇した状態を示す縦断面図である。 １…油タンク、２，２ａ，４ｂ，１０…油路、
３…シリンダ、３ａ，８ｃ…通孔、４…プランジ
ヤ、４ａ…突部、５…ベース、５ｂ，１５ａ…円
孔、８…バルブ、８ａ…ねじ部、１１…ピストン
弁、１１ａ…突軸部、１２…押圧コイルばね、１
３…二次油タンク、１４…孔あき段付きナツト、
１４ａ…段部、１５…弁体。 FIG. 1 is a vertical sectional view showing the plunger in a lowered state in the present invention, and FIG. 2 is a longitudinal sectional view showing the plunger in a raised state. 1... Oil tank, 2, 2a, 4b, 10... Oil path,
3...Cylinder, 3a, 8c...Through hole, 4...Plunger, 4a...Protrusion, 5...Base, 5b, 15a...Circular hole, 8...Valve, 8a...Threaded part, 11...Piston valve, 11a...Protruding shaft part , 12...pressing coil spring, 1
3...Secondary oil tank, 14...Perforated stepped nut,
14a...Step part, 15...Valve body.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 油タンク１と油路２を介して連通する通孔３ａ
を側壁に穿設したシリンダ３に、下面に突部４ａ
を垂設し且つ軸方向に上方で〓形に屈曲する油路
４ｂを貫設したプランジヤ４を昇降自在に嵌挿し
てプランジヤ４が下降したとき油路４ｂと通孔３
ａを連通させ、断面凸形の通孔８ｃを軸方向に貫
設し且つ上部外周を縮経して凸形のねじ部８ａを
形成したバルブ８をシリンダ３の下位に設けたベ
ース５の円孔５ｂに緩挿してバルブ８の外壁と円
孔５ｂの間に形成される空間を油路１０とし、該
ねじ部８ａに孔あき段付きナツト１４を螺嵌する
と共にシリンダ３の下端面に接離自在に当接し且
つ孔あき段付きナツト１４の孔を開閉し更にプラ
ンジヤ４の突部４ａが緩入する円孔１５ａを設け
たドーナツ形の弁体１５をバルブ８の上端面と孔
あき段付きナツト１４の段部１４ａ及びシリンダ
３の下端面の間に形成される空間に介在させ、バ
ルブ８の通孔８ｃに緩入する突軸部１１ａを設け
た凸形のピストン弁１１を通孔８ｃに開閉自在に
圧接すると共にピストン弁１１を囲む空所を二次
油タンク１３とし且つ、ピストン弁１１が下動し
たとき突軸部１１ａとバルブ８の通孔８ｃの間に
形成される空隙を介してプランジヤ４の油路４ｂ
と二次油タンク１３を連通させるように形成し、
油圧送側の油路２ａを前記油路１０に連通させて
成る理美容椅子の油圧昇降装置。 A through hole 3a that communicates with the oil tank 1 via the oil passage 2
The cylinder 3 has a protrusion 4a on the lower surface.
When the plunger 4 is inserted vertically and has an oil passage 4b penetrating it in an axially upwardly curved shape so that it can be raised and lowered, and the plunger 4 is lowered, the oil passage 4b and the through hole 3
The circle of the base 5 is provided below the cylinder 3 with a valve 8 which has a through hole 8c having a convex cross section extending through it in the axial direction, and has a convex threaded portion 8a formed by contracting the upper outer periphery. The space formed between the outer wall of the valve 8 and the circular hole 5b by loosely inserting it into the hole 5b is used as an oil passage 10, and a step nut 14 with a hole is screwed into the threaded part 8a and is in contact with the lower end surface of the cylinder 3. A donut-shaped valve body 15 is connected to the upper end surface of the valve 8 and has a circular hole 15a into which the protrusion 4a of the plunger 4 is loosely inserted. A convex piston valve 11 is provided with a protruding shaft portion 11a that is interposed in the space formed between the stepped portion 14a of the bolt 14 and the lower end surface of the cylinder 3 and loosely inserted into the through hole 8c of the valve 8. 8c, the space surrounding the piston valve 11 is used as the secondary oil tank 13, and the space formed between the protruding shaft portion 11a and the through hole 8c of the valve 8 when the piston valve 11 moves downward. Oil passage 4b of plunger 4 via
and the secondary oil tank 13 are formed to communicate with each other,
A hydraulic lifting device for a hairdressing chair, in which an oil passage 2a on the hydraulic feeding side is communicated with the oil passage 10.