JPS6236836U - - Google Patents
Info
- Publication number
- JPS6236836U JPS6236836U JP12761685U JP12761685U JPS6236836U JP S6236836 U JPS6236836 U JP S6236836U JP 12761685 U JP12761685 U JP 12761685U JP 12761685 U JP12761685 U JP 12761685U JP S6236836 U JPS6236836 U JP S6236836U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- balance piston
- valve rod
- spring
- loading platform
- 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
- 230000003028 elevating effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
図面は本考案の一実施例を示すものであり、第
１図は要部縦断側面図、第２図は油圧制御回路図
、第３図は第１図の部拡大図、第４図は第３図
の左側面図、第５図は流路全開時のブレーキ弁の
拡大縦断面図、第６図は流路全閉時のブレーキ弁
の拡大縦断面図である。
１…車体、２…ブラケツト、３…荷受台、４…
平行リンク機構、５…油圧シリンダ、１９…油圧
ポンプ、２３…ブレーキ弁、２８…弁函、２９…
バランスピストン、３０…弁杆、３１…第１ばね
、３２…第２ばね、３８…第１流通口、４３…第
２流通口、５４…押圧部材としてのボルト。
The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view of the main part, FIG. 2 is a hydraulic control circuit diagram, FIG. 3 is an enlarged view of a portion of FIG. 1, and FIG. 3 is a left side view, FIG. 5 is an enlarged longitudinal sectional view of the brake valve when the flow path is fully open, and FIG. 6 is an enlarged longitudinal sectional view of the brake valve when the flow path is fully closed. 1... Vehicle body, 2... Bracket, 3... Loading platform, 4...
Parallel link mechanism, 5... Hydraulic cylinder, 19... Hydraulic pump, 23... Brake valve, 28... Valve box, 29...
Balance piston, 30... Valve lever, 31... First spring, 32... Second spring, 38... First flow port, 43... Second flow port, 54... Bolt as a pressing member.
Claims (1)
行リンク機構を介して連結され、該平行リンク機
構には、油圧ポンプに接続された油圧シリンダが
連結される荷役車両の荷受台昇降装置において、
前記油圧ポンプおよび油圧シリンダ間には、油圧
ポンプに連なる第１流通口および油圧シリンダに
連なる第２流通口を備える弁函と、第１および第
２流通口間を結ぶ流路の開口面積を制御すべく前
記弁函内に摺動自在に嵌挿されるバランスピスト
ンと、該バランスピストンと軸方向相対移動可能
にして弁函に一端を挿入される弁杆と、弁杆およ
びバランスピストン間に縮設される第１ばねと、
該第１ばねよりもばね定数を小にしてバランスピ
ストンおよび弁函間に縮設される第２ばねとから
成るブレーキ弁が介装され、前記平行リンク機構
には、荷受台が最上方付近にあるときに弁杆に当
接して前記流路の開口面積が小となる方向に押圧
すべく、弁杆に当接可能な押圧部材が設けられる
ことを特徴とする荷役車両の荷受台昇降装置。 A loading platform elevating device for a cargo handling vehicle in which a bracket fixed to a vehicle body and a loading platform are connected via a parallel link mechanism, and a hydraulic cylinder connected to a hydraulic pump is connected to the parallel link mechanism.
A valve box is provided between the hydraulic pump and the hydraulic cylinder and includes a first flow port connected to the hydraulic pump and a second flow port connected to the hydraulic cylinder, and an opening area of a flow path connecting the first and second flow ports is controlled. a balance piston that is slidably inserted into the valve case; a valve rod that is movable relative to the balance piston in the axial direction and whose one end is inserted into the valve case; and a valve rod that is compressed between the valve rod and the balance piston. a first spring that is
A brake valve is interposed between the balance piston and a second spring, which has a spring constant smaller than that of the first spring, and is compressed between the balance piston and the valve case. A loading platform elevating device for a cargo handling vehicle, characterized in that a pressing member that can come into contact with a valve rod is provided so as to press the valve rod in a direction that reduces the opening area of the flow path at a certain time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985127616U JPH0225696Y2 (en) | 1985-08-21 | 1985-08-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985127616U JPH0225696Y2 (en) | 1985-08-21 | 1985-08-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6236836U true JPS6236836U (en) | 1987-03-04 |
| JPH0225696Y2 JPH0225696Y2 (en) | 1990-07-13 |
Family
ID=31022537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985127616U Expired JPH0225696Y2 (en) | 1985-08-21 | 1985-08-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0225696Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011111773A1 (en) * | 2010-03-10 | 2011-09-15 | カヤバ工業株式会社 | Damping valve |
| JP2011185391A (en) * | 2010-03-10 | 2011-09-22 | Kyb Co Ltd | Damping valve |
| JP2011185390A (en) * | 2010-03-10 | 2011-09-22 | Kyb Co Ltd | Damping valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51102107U (en) * | 1975-02-15 | 1976-08-17 | ||
| JPS5351451U (en) * | 1976-10-05 | 1978-05-01 |
-
1985
- 1985-08-21 JP JP1985127616U patent/JPH0225696Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51102107U (en) * | 1975-02-15 | 1976-08-17 | ||
| JPS5351451U (en) * | 1976-10-05 | 1978-05-01 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011111773A1 (en) * | 2010-03-10 | 2011-09-15 | カヤバ工業株式会社 | Damping valve |
| JP2011185391A (en) * | 2010-03-10 | 2011-09-22 | Kyb Co Ltd | Damping valve |
| JP2011185390A (en) * | 2010-03-10 | 2011-09-22 | Kyb Co Ltd | Damping valve |
| US8944222B2 (en) | 2010-03-10 | 2015-02-03 | Kayaba Industry Co., Ltd. | Damping valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0225696Y2 (en) | 1990-07-13 |