Title:
STRAIN GAUGE TYPE LOAD SENSOR
Document Type and Number:
Japanese Patent JP3855780
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a strain gauge type load sensor capable of realizing a dual range with a single load receiving plate and capable of protecting the load sensor with a simple structure when measurement is beyond an allowable load.
SOLUTION: When an object to be weighed is placed on a weighing of plate 1, a load acts on movable columns 34, 24 of load detection sections 3, 2, and the columns displace parallel to stationary columns 33, 23. Amounts of their displacement are detected by strain gauges S31-S34 and S21-S24 respectively, and a weight value of the object to be weighed can be measured. If the weight W of the weighed object placed on the weighing plate 1 is beyond allowable weighing of the load detection section 3 for smaller allowable weighing, a lower end of the movable column 34 abuts against a displacement stop 4, and the movable column 3 does not displace any more. At this time, a Roberval mechanism of the load detection section 2 for larger allowable weighing continuously deforms. An amount of its deformation is detected by the respective strain gauges S21-S24, and the weight of the weighed object can be measured.
More Like This:
| WO/2007/129718 | LOAD MEASURING MECHANISM FOR ELECTRONIC BALANCE,AND METHOD FOR ASSEMBLING THE SAME MECHANISM |
| JP3570373 | ELECTRONIC BALANCE |
| JPS61283835 | WEIGHT DETECTION MECHANISM |
Inventors:
Nobuyuki Yoshikuwa
Application Number:
JP2002019319A
Publication Date:
December 13, 2006
Filing Date:
January 29, 2002
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
G01G21/16; G01G3/14; G01G21/24; G01G23/02; G01L1/22; G01L1/26; (IPC1-7): G01G21/16; G01G3/14; G01G23/02; G01L1/22
Domestic Patent References:
| JP6090067B2 | ||||
| JP54163966U |
Attorney, Agent or Firm:
Toshifumi Kita
Hiroyuki Eguchi
Hiroyuki Eguchi