JPH0456939U - - Google Patents

Description

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

第１図は本考案の一実施例の構成を示す断面図
、第２図はバツクドアに装備されたガススプリン
グの動作の説明図、第３図は本考案ならびに従来
のガススプリングによるバツクドアの開扉速度に
かかわる特性曲線図である。 １……シリンダ（チユーブ）、１Ａ……ストツ
パ部、２……ピストン、３……ロツドガイド、４
……ピストンロツド、４Ａ……細径部、４Ｂ……
大径部、５……ピストン、６……封入オイル、７
……第１室、８……第２室、９……連通孔、１０
……中間ガイド部材、１２……オイル室、１３…
…連通孔、１６……弁板、２０……（加圧）ガス
。 Figure 1 is a sectional view showing the configuration of an embodiment of the present invention, Figure 2 is an explanatory diagram of the operation of the gas spring installed in the back door, and Figure 3 is the opening of the back door using the gas spring of the present invention and the conventional gas spring. FIG. 3 is a characteristic curve diagram related to speed. 1... Cylinder (tube), 1A... Stopper part, 2... Piston, 3... Rod guide, 4
...Piston rod, 4A...Small diameter part, 4B...
Large diameter part, 5... Piston, 6... Enclosed oil, 7
...First chamber, 8...Second chamber, 9...Communication hole, 10
...Intermediate guide member, 12...Oil chamber, 13...
... Communication hole, 16 ... Valve plate, 20 ... (pressurized) gas.

Claims (1)

【実用新案登録請求の範囲】 加圧ガスと共に潤滑油が封入されたシリンダ内
を摺動自在なピストンによりその頂部側の第１室
とピストンロツド側の第２室とに連通可能に画成
し、前記ピストンロツドを気液密に突出させるシ
リンダ端部のロツドガイドと前記ピストンロツド
を貫通させる貫通孔を有する中間ガイド部材との
間に前記潤滑油を収容するオイル室が形成された
ガススプリングにおいて、 前記中間ガイド部材に前記オイル室と前記第２
室との間を連通させる連通孔と、前記第２室の圧
縮時にのみ前記連通孔を閉塞可能な弁部材とを設
けると共に、前記ピストンロツドに前記第２室の
最圧縮状態で前記中間ガイド部材の貫通孔との間
に隙間を形成する細径部を設けたことを特徴とす
るガススプリング。[Claims for Utility Model Registration] A cylinder filled with pressurized gas and lubricating oil is defined by a slidable piston so as to be able to communicate with a first chamber on the top side and a second chamber on the piston rod side, In the gas spring, an oil chamber for storing the lubricating oil is formed between a rod guide at the end of the cylinder through which the piston rod protrudes in a gas-liquid tight manner and an intermediate guide member having a through hole through which the piston rod passes. The member includes the oil chamber and the second
A communication hole communicating with the chamber and a valve member capable of closing the communication hole only when the second chamber is compressed are provided, and the intermediate guide member is provided in the piston rod when the second chamber is in the most compressed state. A gas spring characterized by having a narrow diameter portion that forms a gap between the gas spring and the through hole.