JPS6450299U - - Google Patents
Info
- Publication number
- JPS6450299U JPS6450299U JP14386887U JP14386887U JPS6450299U JP S6450299 U JPS6450299 U JP S6450299U JP 14386887 U JP14386887 U JP 14386887U JP 14386887 U JP14386887 U JP 14386887U JP S6450299 U JPS6450299 U JP S6450299U
- Authority
- JP
- Japan
- Prior art keywords
- tail cylinder
- cargo handling
- handling device
- control circuit
- flow rate
- 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.)
- Pending
Links
- 239000003921 oil Substances 0.000 claims 2
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
第１図は本考案の一実施例に係る産業車両の荷
役装置のテイルトシリンダの速度制御回路を示す
油圧回路図、第２図は第１図の回路の流量調整弁
の一例を示す半縦断正面図、第３図は第１図の荷
役装置が適用されたフオークリフトの概略正面図
、第４図は第１図の流量調整弁の流量特性を示す
グラフ、第５図は第１図の流量調整弁の他の流量
特性を示すグラフ、第６図は従来の産業車両の荷
役装置のテイルトシリンダの速度制御回路図、第
７図は第６図のテイルトシリンダの負荷とロツド
側の第２室の内圧との関係を示すグラフ、第８図
は第７図の内圧状態で前傾操作した場合の内圧の
変化を示すグラフである。
符号の説明、１…荷役装置本体、２…車両、６
…テイルトシリンダ、１０…油圧ポンプ（油圧源
）、１８…油溜め、１９…バイパス路、２０…流
量調整弁、３０…固定オリフイス（ブリードオフ
制御用絞り）、Ｓ１，Ｓ２…第１、第２室。
Fig. 1 is a hydraulic circuit diagram showing a speed control circuit for a tail cylinder of a cargo handling device for an industrial vehicle according to an embodiment of the present invention, and Fig. 2 is a semi-longitudinal diagram showing an example of a flow rate regulating valve of the circuit shown in Fig. 1. 3 is a schematic front view of a forklift to which the cargo handling device shown in FIG. 1 is applied, FIG. 4 is a graph showing the flow rate characteristics of the flow rate regulating valve shown in FIG. Graphs showing other flow rate characteristics of the flow rate regulating valve. Figure 6 is a speed control circuit diagram of the tail cylinder of a conventional industrial vehicle cargo handling device. Figure 7 is a graph showing the load of the tail cylinder and rod side of Figure 6. FIG. 8 is a graph showing the relationship with the internal pressure of the second chamber, and FIG. 8 is a graph showing changes in the internal pressure when the forward tilting operation is performed in the internal pressure state of FIG. 7. Explanation of symbols, 1...Main body of cargo handling device, 2...Vehicle, 6
... tail cylinder, 10 ... hydraulic pump (hydraulic source), 18 ... oil reservoir, 19 ... bypass path, 20 ... flow rate adjustment valve, 30 ... fixed orifice (throttle for bleed-off control), S 1 , S 2 ... first , second chamber.
Claims (1)
ンダを有し、該テイルトシリンダの作動速度を制
御する速度制御回路を備えた産業車両の荷役装置
において、 前記速度制御回路には、油圧源と前記テイルト
シリンダとを接続する油路に流量調整弁を有し、
一方油圧源から送られる作動油をテイルトシリン
ダをバイパスして油溜めに戻すバイパス路を設け
、該バイパス路にブリードオフ制御用の絞り部を
形成して成ることを特徴とする産業車両の荷役装
置。[Claims for Utility Model Registration] A cargo handling device for an industrial vehicle, which has a tail cylinder that tilts a cargo handling device body back and forth, and is equipped with a speed control circuit that controls the operating speed of the tail cylinder, comprising: the speed control circuit. has a flow rate adjustment valve in an oil path connecting the hydraulic source and the tail cylinder,
A cargo handling system for an industrial vehicle characterized in that a bypass path is provided in which hydraulic oil sent from a hydraulic source bypasses a tail cylinder and returns to an oil reservoir, and a constriction part for bleed-off control is formed in the bypass path. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14386887U JPS6450299U (en) | 1987-09-22 | 1987-09-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14386887U JPS6450299U (en) | 1987-09-22 | 1987-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6450299U true JPS6450299U (en) | 1989-03-28 |
Family
ID=31411075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14386887U Pending JPS6450299U (en) | 1987-09-22 | 1987-09-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6450299U (en) |
-
1987
- 1987-09-22 JP JP14386887U patent/JPS6450299U/ja active Pending
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