JPH01125259U - - Google Patents
Info
- Publication number
- JPH01125259U JPH01125259U JP2159188U JP2159188U JPH01125259U JP H01125259 U JPH01125259 U JP H01125259U JP 2159188 U JP2159188 U JP 2159188U JP 2159188 U JP2159188 U JP 2159188U JP H01125259 U JPH01125259 U JP H01125259U
- Authority
- JP
- Japan
- Prior art keywords
- check valve
- pressure
- door
- forward direction
- hydraulic pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
Landscapes
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Description
第１図〜第５図はこの考案の第１実施例を示す
もので、第１図は鉄道車両用扉の気密保持装置の
全体構成を示すと共に該装置により扉の気密保持
作用が行われている状態を示す縦断面図、第２図
は第１逆止弁と第２逆止弁との構成及び作用を示
す要部拡大縦断面図、第３図は同じく構成及び作
用を示す要部拡大縦断面図、第４図は鉄道車両用
扉の気密保持装置の全体構成を示すと共に該装置
による扉の気密保持が解除された状態を示す縦断
面図、第５図は第１逆止弁と第２逆止弁との構成
及び作用を示す要部拡大縦断面図である。第６図
、第７図、第８図は夫々、この考案の第２実施例
に係る第１逆止弁と第２逆止弁との構成及び作用
を示す要部拡大縦断面図である。
１…気密保持装置、７…液圧シリンダ、２４…
パイロツトピストン、３１…第１逆止弁、３２…
第２逆止弁、３４…弾性部材（制御スプリング）
、３６…液圧給排管路、３７…押し付けシリンダ
、４２…扉、５３，６０…バイパス通路。
Figures 1 to 5 show a first embodiment of this invention, and Figure 1 shows the overall structure of a device for keeping airtightness for a door for a railway vehicle, and also shows how the door is kept airtight by the device. Fig. 2 is an enlarged vertical sectional view of the main parts showing the configuration and operation of the first check valve and the second check valve, and Fig. 3 is an enlarged longitudinal sectional view of the main parts showing the structure and operation of the first check valve and the second check valve. FIG. 4 is a longitudinal sectional view showing the overall configuration of the airtight maintenance device for a door for a railway vehicle, and a vertical sectional view showing a state in which the airtightness of the door by the device is released. FIG. 5 is a longitudinal sectional view showing the first check valve and FIG. 7 is an enlarged vertical cross-sectional view of a main part showing the structure and function of the second check valve. FIG. 6, FIG. 7, and FIG. 8 are enlarged vertical sectional views of essential parts showing the structure and operation of a first check valve and a second check valve according to a second embodiment of the invention, respectively. 1... Airtight maintenance device, 7... Hydraulic cylinder, 24...
Pilot piston, 31...first check valve, 32...
Second check valve, 34...elastic member (control spring)
, 36... Hydraulic pressure supply/drainage pipe line, 37... Pressing cylinder, 42... Door, 53, 60... Bypass passage.
Claims (1)
路と液圧源との間に、前記押し付けシリンダ方向
を順方向とする第１逆止弁と、この第１逆止弁を
液圧源の圧力降下時に開弁させるパイロツトピス
トンと、前記第１逆止弁をバイパスするバイパス
通路と、このバイパス通路に設置されて前記液圧
源方向を順方向とする第２逆止弁と、この第２逆
止弁を逆方向に付勢すると共に該第２逆止弁の順
方向に作用する液圧が第１設定圧以上で且つ第２
設定圧以下の所定圧を超えた時に該第２逆止弁を
開弁させる弾性部材とを具備してなることを特徴
とする鉄道車両用扉の気密保持装置。 A first check valve whose forward direction is in the direction of the pressing cylinder is provided between the hydraulic pressure supply/drain line of the pressing cylinder for keeping the door airtight and the hydraulic pressure source; a pilot piston that opens when the pressure drops; a bypass passage that bypasses the first check valve; a second check valve that is installed in the bypass passage and whose forward direction is the direction of the fluid pressure source; The hydraulic pressure that biases the check valve in the reverse direction and acts on the second check valve in the forward direction is equal to or higher than the first set pressure, and
1. An airtight maintenance device for a door for a railway vehicle, comprising an elastic member that opens the second check valve when a predetermined pressure below a set pressure is exceeded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988021591U JPH0732308Y2 (en) | 1988-02-19 | 1988-02-19 | Airtight holding device for railroad vehicle doors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988021591U JPH0732308Y2 (en) | 1988-02-19 | 1988-02-19 | Airtight holding device for railroad vehicle doors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01125259U true JPH01125259U (en) | 1989-08-25 |
| JPH0732308Y2 JPH0732308Y2 (en) | 1995-07-26 |
Family
ID=31238964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988021591U Expired - Lifetime JPH0732308Y2 (en) | 1988-02-19 | 1988-02-19 | Airtight holding device for railroad vehicle doors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732308Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01168648U (en) * | 1988-05-11 | 1989-11-28 |
-
1988
- 1988-02-19 JP JP1988021591U patent/JPH0732308Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01168648U (en) * | 1988-05-11 | 1989-11-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0732308Y2 (en) | 1995-07-26 |
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