JPH0353990U - - Google Patents
Info
- Publication number
- JPH0353990U JPH0353990U JP11557489U JP11557489U JPH0353990U JP H0353990 U JPH0353990 U JP H0353990U JP 11557489 U JP11557489 U JP 11557489U JP 11557489 U JP11557489 U JP 11557489U JP H0353990 U JPH0353990 U JP H0353990U
- Authority
- JP
- Japan
- Prior art keywords
- jib
- boom
- tilt angle
- base end
- hydraulic cylinder
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Jib Cranes (AREA)
Description
第１図は本考案の実施例にかかる誤作動防止装
置を備えたジブ付きブームの側面図、第２図は第
１図の一部平面図、第３図は第１図の部拡大図
、第４図は第３図の−矢視図、第５図は第３
図の一部分解斜視図、第６図は第１図の誤作動防
止装置の油圧回路及び電気回路図、第７図は第１
図の部拡大図、第８図は第７図の−矢視図
、第９図は第１図の−断面図、第１０図は公
知のジブ付きブームの一部側面図である。
１……ブーム（伸縮ブーム）、２……ジブ、３
……テンシヨン装置、３ａ……テンシヨン装置基
端部、４……ジブ非使用状態検出手段（リミツト
スイツチ）、５……油圧シリンダ制御手段、１１
……基端ブーム、１４……ブーム先端部、２１…
…ジブ本体、２１ａ……ジブ本体基端部、３１…
…テンシヨン部材、３６……油圧シリンダ、３７
……油圧ホース。
FIG. 1 is a side view of a boom with a jib equipped with a malfunction prevention device according to an embodiment of the present invention, FIG. 2 is a partial plan view of FIG. 1, and FIG. 3 is an enlarged view of a portion of FIG. Figure 4 is a - arrow view of Figure 3, Figure 5 is a view of the 3rd figure.
Fig. 6 is a hydraulic circuit and electric circuit diagram of the malfunction prevention device shown in Fig. 1, and Fig. 7 is a partially exploded perspective view of Fig. 1.
FIG. 8 is an enlarged view of the part shown in FIG. 7, FIG. 9 is a sectional view taken from FIG. 1, and FIG. 10 is a partial side view of a known boom with a jib. 1...Boom (telescopic boom), 2...Jib, 3
... Tension device, 3a ... Tension device base end, 4 ... Jib non-use state detection means (limit switch), 5 ... Hydraulic cylinder control means, 11
...Base end boom, 14...Boom tip, 21...
...Jib body, 21a...Jib main body base end, 31...
...Tension member, 36...Hydraulic cylinder, 37
...Hydraulic hose.
Claims (1)
部２１ａを該ジブ本体２１が起伏自在なる如くし
て枢支し、且つ前記ブーム先端部１４の上部と前
記ジブ本体２１の先端寄り適所との間にチルト角
調節用の油圧シリンダ３６を有するテンシヨン装
置３を介設してなるジブチルト角可変形のジブ付
きブームにおいて、ブーム１あるいはジブ２の適
所に設けられていてジブ２が非使用状態であるこ
とを検出するジブ非使用状態検出手段４と、該ジ
ブ非使用状態検出検出手段４からの信号で前記テ
ンシヨン装置３の油圧シリンダ３６がテンシヨン
装置３の基端部３ａを少なくともジブ基端側に移
動させる方向に作動するのを禁止する油圧シリン
ダ制御手段５とを備えていることを特徴とするジ
ブチルト角可変形のジブ付きブームにおける誤作
動防止装置。 The base end 21a of the jib body 21 is pivoted to the lower part of the boom tip 14 so that the jib body 21 can rise and fall freely, and the upper part of the boom tip 14 and the appropriate position near the tip of the jib body 21 are connected. In a jib-equipped boom with a variable tilt angle, in which a tension device 3 having a hydraulic cylinder 36 for adjusting the tilt angle is interposed, the jib is installed at an appropriate position on the boom 1 or the jib 2, and when the jib 2 is not in use. A jib non-use state detection means 4 detects that the jib is not in use, and a signal from the jib non-use state detection means 4 causes the hydraulic cylinder 36 of the tension device 3 to move the base end 3a of the tension device 3 at least to the jib base end side. 1. A malfunction prevention device for a jib-equipped boom with a variable jib tilt angle, characterized in that it is equipped with a hydraulic cylinder control means 5 that prohibits the boom from operating in a direction in which the jib tilt angle is variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11557489U JPH0754231Y2 (en) | 1989-09-29 | 1989-09-29 | Malfunction prevention device for jib boom with variable dibutylt angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11557489U JPH0754231Y2 (en) | 1989-09-29 | 1989-09-29 | Malfunction prevention device for jib boom with variable dibutylt angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0353990U true JPH0353990U (en) | 1991-05-24 |
| JPH0754231Y2 JPH0754231Y2 (en) | 1995-12-13 |
Family
ID=31663902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11557489U Expired - Fee Related JPH0754231Y2 (en) | 1989-09-29 | 1989-09-29 | Malfunction prevention device for jib boom with variable dibutylt angle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754231Y2 (en) |
-
1989
- 1989-09-29 JP JP11557489U patent/JPH0754231Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754231Y2 (en) | 1995-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |