GB1308581A - Crane safety device - Google Patents
Crane safety deviceInfo
- Publication number
- GB1308581A GB1308581A GB1552171A GB1552171A GB1308581A GB 1308581 A GB1308581 A GB 1308581A GB 1552171 A GB1552171 A GB 1552171A GB 1552171 A GB1552171 A GB 1552171A GB 1308581 A GB1308581 A GB 1308581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cam
- boom
- shaft
- follower
- crane
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
1308581 Crane safety devices KATO SEISAKUSHO KK 18 May 1971 [18 May 1970] 15521/71 Heading B8B A control device for a safety device of a crane having a boom 7 of variable length and inclination angle comprises a three-dimensional cam 1 mounted for sliding movement along a shaft 19 in response to the length of the boom 7 sensed by a wire 15 wound on a spring drum 14 and attached to the jib head. Rotation of the drum 14 sets the position of the cam 1 along the shaft 19 through gearing 22, 21, shaft 20 and yoke 23. The angular setting of the cam 1 about the shaft 19 is by a pendulum 27 operating through gears 28, 29 integral with 30, and 31 (which can slide along the gear 30). The control device is contained in a housing 13 mounted on the boom 7 by a plate 18, so that inclination of the boom 7 causes the angular movement of the cam 1. The shape of the cam 1 is so determined by actual measurement that the cross-sectional shape at which a cam-follower 2 contacts the cam 1 is such that, at the maximum allowable load the displacement of the cam-follower 2 and the strain in the base of the boom 7 sensed by a bellows (42), Fig. 1 (not shown), are in appropriate correspondence and actuate a microswitch (5), Fig. 4 (not shown), in the crane safety device control circuit (not shown) operating an automatic circuit breaker or alarm. A second cam-follower 2a co-operates with a part of the cam 1 corresponding to the use of an auxiliary jib boom (not shown) detachably mounted in the extremity of the main boom 7.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4162870A JPS5032498B1 (en) | 1970-05-18 | 1970-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1308581A true GB1308581A (en) | 1973-02-21 |
Family
ID=12613580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1552171A Expired GB1308581A (en) | 1970-05-18 | 1971-05-18 | Crane safety device |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5032498B1 (en) |
DE (1) | DE2124739C3 (en) |
FR (1) | FR2090102B1 (en) |
GB (1) | GB1308581A (en) |
SE (1) | SE375512B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6600753B2 (en) * | 2017-02-09 | 2019-10-30 | 株式会社前田製作所 | Mobile crane safety device |
CN111891930B (en) * | 2020-08-05 | 2022-08-19 | 河南斯派特机械设备有限公司 | Spider crane hoist wire rope integrated protection alarm device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1171828B (en) * | 1954-03-31 | 1964-06-04 | Siemens Ag | Bucket wheel excavator |
US3269560A (en) * | 1964-12-28 | 1966-08-30 | Drott Mfg Corp | Safety control for cranes |
GB993954A (en) * | 1966-07-07 | 1965-06-02 | Weighload Ltd | Safe load indicators in jib cranes |
-
1970
- 1970-05-18 JP JP4162870A patent/JPS5032498B1/ja active Pending
-
1971
- 1971-05-17 FR FR7117773A patent/FR2090102B1/fr not_active Expired
- 1971-05-17 SE SE637071A patent/SE375512B/xx unknown
- 1971-05-18 GB GB1552171A patent/GB1308581A/en not_active Expired
- 1971-05-18 DE DE19712124739 patent/DE2124739C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5032498B1 (en) | 1975-10-21 |
SE375512B (en) | 1975-04-21 |
FR2090102B1 (en) | 1976-07-09 |
DE2124739A1 (en) | 1971-12-02 |
DE2124739B2 (en) | 1977-12-01 |
FR2090102A1 (en) | 1972-01-14 |
DE2124739C3 (en) | 1978-07-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |