JPS56105031A - Alarm device for dangerous work - Google Patents
Alarm device for dangerous workInfo
- Publication number
- JPS56105031A JPS56105031A JP616280A JP616280A JPS56105031A JP S56105031 A JPS56105031 A JP S56105031A JP 616280 A JP616280 A JP 616280A JP 616280 A JP616280 A JP 616280A JP S56105031 A JPS56105031 A JP S56105031A
- Authority
- JP
- Japan
- Prior art keywords
- detector
- rise
- bucket
- oil pressure
- load
- 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
- 239000012212 insulator Substances 0.000 abstract 1
Landscapes
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
PURPOSE: To prevent the upset of a car body previously by a mechanism wherein a load detector and a rise detector are mounted and an alarm device is actuated when the both detectors detect.
CONSTITUTION: When load is loaded into a bucket 17 and exceeds a fixed quantity, the oil pressure of an oil pressure hose 20 rises, a piston 24 of a load detector 21 is pushed by the oil pressure and moved to the cap 25 side, and the detector 21 is at ON. When the bucket 17 previously falls at that time, an operation lever 33 does not push a working piece 32a of a rise detector 32, and a movable contact 41 is located at the positions of insulators 37, 38. Thus, an alarm buzzer 44 and an alarm lamp 45 also do not function. When a lifting arm 16 is upward oscillated by the extending action of a cylinder 18 for rise and fall and the bucket 17 is lifted, the operation lever 33 is turned, and the working piece 32a of the rise detector 32 is pushed. Thus, the movable contact 41 switches the rise detector 32 ON, and the alarm lamp 45 flickers.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP616280A JPS56105031A (en) | 1980-01-21 | 1980-01-21 | Alarm device for dangerous work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP616280A JPS56105031A (en) | 1980-01-21 | 1980-01-21 | Alarm device for dangerous work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56105031A true JPS56105031A (en) | 1981-08-21 |
| JPS621052B2 JPS621052B2 (en) | 1987-01-10 |
Family
ID=11630826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP616280A Granted JPS56105031A (en) | 1980-01-21 | 1980-01-21 | Alarm device for dangerous work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56105031A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153269U (en) * | 1982-04-08 | 1983-10-13 | 北越工業株式会社 | Safety device for construction machinery equipped with earth removal plate |
| CN101572858B (en) | 2009-06-23 | 2012-09-05 | 杭州华三通信技术有限公司 | Security detection method of network equipment and device thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5221556U (en) * | 1975-08-01 | 1977-02-16 | ||
| JPS5228106A (en) * | 1975-08-29 | 1977-03-02 | Kubota Ltd | Device for preventing shovel loader from turning down |
-
1980
- 1980-01-21 JP JP616280A patent/JPS56105031A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5221556U (en) * | 1975-08-01 | 1977-02-16 | ||
| JPS5228106A (en) * | 1975-08-29 | 1977-03-02 | Kubota Ltd | Device for preventing shovel loader from turning down |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153269U (en) * | 1982-04-08 | 1983-10-13 | 北越工業株式会社 | Safety device for construction machinery equipped with earth removal plate |
| CN101572858B (en) | 2009-06-23 | 2012-09-05 | 杭州华三通信技术有限公司 | Security detection method of network equipment and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS621052B2 (en) | 1987-01-10 |
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