JPS6456486U - - Google Patents
Info
- Publication number
- JPS6456486U JPS6456486U JP14929687U JP14929687U JPS6456486U JP S6456486 U JPS6456486 U JP S6456486U JP 14929687 U JP14929687 U JP 14929687U JP 14929687 U JP14929687 U JP 14929687U JP S6456486 U JPS6456486 U JP S6456486U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- proximal
- rope
- sheave
- fixed
- 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
- 230000008602 contraction Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Jib Cranes (AREA)
Description
第１〜７図は本考案の実施例を示し、第１図、
第２図はそれぞれ第４図−線断面正面図を示
し、第１図は収縮時、第２図は伸長時を示す。第
３図は第２図−線断面側面図、第４図は第２
図−線断面側面図、第５図は第２図のＡ部詳
細を示す第４図−線断面正面図、第６図は第
５図−線断面平面図、第７図は第２図−
線断面側面図、第８図は従来例の、第１図相当図
である。
１……シリンダ装置、２……ドラム、３……ロ
ープ、４……第１の止着部、５……第２の止着部
、６……第１ブーム、７……第２ブーム、８……
第３ブーム、９……ガイドローラ、１０……伸長
用シーブ、１１……収縮用シーブ、１２……収縮
用シーブ、１３……ピン、１４……収縮用シーブ
、１５……第１の止着部、１６……第２の止着部
、１７……伸長用ロープ、１８……収縮用ロープ
、１９……支承軸、２０……軸受、２１……ピン
、２２……噛合部材、２３……ボード、２４……
ボルト、２５……ナツト、２６……長孔、２７…
…長孔。
1 to 7 show embodiments of the present invention, and FIG.
FIG. 2 shows a cross-sectional front view taken along the line of FIG. 4, with FIG. 1 showing the state when contracted and FIG. 2 showing the state when being expanded. Figure 3 is a cross-sectional side view taken from Figure 2, and Figure 4 is a cross-sectional side view of Figure 2.
Figure 5 is a cross-sectional side view taken along the lines in Figure 2, Figure 4 is a front view taken along the lines showing details of section A in Figure 2, Figure 6 is a sectional plan view taken along the lines shown in Figure 5, and Figure 7 is a sectional view taken along the lines shown in Figure 2.
The line cross-sectional side view, FIG. 8, is a diagram corresponding to FIG. 1 of the conventional example. DESCRIPTION OF SYMBOLS 1... Cylinder device, 2... Drum, 3... Rope, 4... First fastening part, 5... Second fastening part, 6... First boom, 7... Second boom, 8...
3rd boom, 9... Guide roller, 10... Extension sheave, 11... Contraction sheave, 12... Contraction sheave, 13... Pin, 14... Contraction sheave, 15... First stop Fitting part, 16... Second fastening part, 17... Extension rope, 18... Contraction rope, 19... Support shaft, 20... Bearing, 21... Pin, 22... Engaging member, 23 ...Board, 24...
Bolt, 25... Nut, 26... Long hole, 27...
...Long hole.
Claims (1)
と中間ブームと先端側ブームとを備え、中間ブー
ムは基端側ブームとの間に設けたシリンダ装置に
より伸縮するようにした多段伸縮ブームにおいて
、前記中間ブームの先端側端部付近及び基端側端
部付近にそれぞれ配備された伸長用シーブ及び収
縮用シーブと、前記先端側ブームに該先端側ブー
ムに対し相対的に回転可能に保持されたロープ巻
付用部材と、該ロープ巻付用部材を前記先端側ブ
ームに対して相対的に固定する固定装置とを備え
、前記基端側ブームに対して相対的に固定した第
１の止着部に止着したロープを、前記伸長用シー
ブに掛け回した後、前記ロープ巻付用部材に巻き
付け、さらに前記収縮用シーブに掛け回し、前記
基端側ブームに対して相対的に固定した第２の止
着部に止着したことを特徴とする多段伸縮ブーム
。 The multistage telescopic boom includes a proximal boom, an intermediate boom, and a distal end boom that are combined to be extendable and retractable, and the intermediate boom is extendable and retractable by a cylinder device provided between the proximal boom and the proximal boom. An extension sheave and a contraction sheave are arranged near the distal end and proximal end of the intermediate boom, respectively, and a rope is held by the distal boom so as to be rotatable relative to the distal boom. a first fastening section that is provided with a wrapping member and a fixing device that fixes the rope wrapping member relatively to the distal end boom, and that is fixed relative to the proximal boom; A second rope fixed to the proximal boom is wound around the extension sheave, then around the rope winding member, and further around the contraction sheave, and is fixed relatively to the proximal boom. A multi-stage telescopic boom characterized by being fixed to the fastening part of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14929687U JPH041189Y2 (en) | 1987-10-01 | 1987-10-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14929687U JPH041189Y2 (en) | 1987-10-01 | 1987-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6456486U true JPS6456486U (en) | 1989-04-07 |
| JPH041189Y2 JPH041189Y2 (en) | 1992-01-16 |
Family
ID=31421397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14929687U Expired JPH041189Y2 (en) | 1987-10-01 | 1987-10-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH041189Y2 (en) |
-
1987
- 1987-10-01 JP JP14929687U patent/JPH041189Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH041189Y2 (en) | 1992-01-16 |
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