CN2301707Y

CN2301707Y - Two-face scale additional weight steelyard

Info

Publication number: CN2301707Y
Application number: CN 96223667
Authority: CN
Inventors: 方强
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-09-16
Filing date: 1996-09-16
Publication date: 1998-12-23
Anticipated expiration: 2006-09-16

Abstract

The utility model relates to a weighing device for measuring quantity, the configuration is similar to existing steelyards, comprising a steelyard beam, two lift buttons, a steelyard hook (or a steelyard disc), a movable weight and an added weight. The surface of the steelyard beam is provided with the same scale to buyers and sellers for simultaneous reading, the graduation of the scale is shared by a zero point button and a maximum capacity button, and the reading of the zero point button and the maximum capacity button are respectively scaled at the top and the bottom of the scale. The added weight is hung on the end of the steelyard beam for enlarging measurement range, so the utility model can overcome the disadvantages of easy cheat and low precision of the existing steelyards and can reach the requirement of International Organization of Legal Metrology (OIML) to commercial steelyards.

Description

Two-sided scale increases the thallium steelyard

The utility model is that two-sided scale increases the thallium steelyard, belongs to measurement instrument, is the lever class weighing apparatus that claims quality.

Existing steelyard knob at zero point and maximum weighing knob respectively have a scale, only for seller's reading, the illegal retailer who has then utilizes the buyer to can't see scale and practises fraud, and this does not meet the regulation of OIML (OIML) at " international recommendation " No. 28 " technical regulation of non-automatic weighing apparatus " 1-2-1 joint: " weighing apparatus must not have the characteristics of doing the duplicity use easily ". ^*

No. 3 " non-automatic weighing apparatus metrological regulation " chapter 2 4-4 joint of OIML (OIML) " international recommendation " provides the weighing apparatus of () level accuracy, and it examines and determine number of scale division

N=is maximum, and weighing/calibrating scale divisions value (weighing of adjacent scale correspondence is poor) (1) n must be more than or equal to 500. ^*For existing steelyard, as steelyard common on the market, zero point knob the about 2500g of maximum weighing, the weighing difference of adjacent scale correspondence is half two (25g), then n=2500g/25g=100 is far smaller than 500.In view of the above, 1994 No. 16 " using the notice of steelyard about restriction in public's trade " regulations of State Bureau of Technical Supervision, before the end of the year 97 fixedly the stand stop using steelyard, the steelyard that huckster in the country fair beyond on-fixed stand and the country fair uses, must accept the compulsory verification of local standard metrological service, guarantee that weighing is accurate.

The purpose of this utility model is in order to overcome the shortcoming of existing steelyard, make it satisfy the requirement of OIML (OIML) to commercial scale, and make carry easy, easy to use, cheap, verification is simple and the steelyard of suitable China's actual conditions can be developed, and becomes the basic weighing apparatus of legal use.It at first is the steelyard that replaces on-fixed stand and huckster use with the utility model.

The two-sided scale that the new shape of this practicality proposes increases the thallium steelyard, and its profile is similar with existing steelyard on the market, shown in figure (1), by the arm beam of steelyard 1, zero point knob 2, maximum weighing knob 3, steelyard hook (or scale pan) 4, trip thallium 5, increase thallium 6 and form." the two-sided scale " that the utility model proposes, at first be with zero point knob be combined into one (spacing is identical and reading divides two rows) with two scales of maximum weighing knob, shown in figure (2), among the figure, the arm beam of steelyard replaces with graduated scale, reading when scale top numeral supplies knob at zero point (O is the knob at zero point), reading when numeral is for maximum weighing knob (O is maximum weighing knob) below the scale.Among the figure this scale is for seller's reading, the another side of the arm beam of steelyard and this scale over against position (not drawing among the figure), a duplicate scale is arranged, for buyer's reading.The implication that Here it is " two-sided ".Here, zero point knob and the shared same spacing of maximum weighing knob scale, need to satisfy AO be positive integer than AO in the design.

" the increasing thallium " that the utility model proposes as figure (1) 6 shown in, be used for increasing calibrating number of scale division n.Existing steelyard is only with trip thallium 5, when trip thallium 5 is positioned at the terminal L of arm beam of steelyard place, the maximum weighing that can obtain knob at zero point (or maximum weighing knob) is Max, will increase rudder 6 (establish increase thallium and the trip thallium is identical in quality) and be hung on arm beam of steelyard end L, also move on to the L place with upstream thallium and trip thallium again, then can obtain maximum weighing is 2Max.By (1) formula as can be known, the constant molecule of denominator increases then n value increase.Common steelyard on the market, the maximum weighing of its knob at zero point is about 2500g, as increasing thallium with one, then maximum weighing expands 5000g to, four increase thallium will be 12500g corresponding to maximum weighing, when calibrating scale divisions value constant (25g), n=15000g/25g=500 has reached () level standard of accruacy.(be designed to 5g as calibrating scale divisions value, as long as one increases thallium, n can reach 500.)

As embodiment, shown in figure (1), AL=600mm, AO=20mm, AO=100mm, as making the trip thallium that counterweight produces and increasing thallium, quality is 250g, and the quality that the arm beam of steelyard, steelyard hook, the scale pan and two carry knob is that 500g and barycenter are at the O place.Adopt typography, make minimum scale on the scale be 2mm (corresponding to zero point knob be 5g, be 25g corresponding to maximum weighing knob), maximum weighing was 125g when then zero point, knob was only with the trip thallium, the maximum weighing is 2500g when adding a trip thallium.The minimum weighing of maximum weighing knob during only with the trip thallium is 2000g, and maximum weighing is 9250g, and adding one, to swim the then maximum weighing of thallium be 1650g.Corresponding to the scale of weighing also shown in figure (2) (arm beam of steelyard is replaced by scale among the figure, and scale is in the face of the seller among the figure, and the scale of facing the buyer is just covered fails to draw).

^*" lever scale " Liu, Li Hongling, Zhang Jungao write, China Measuring Press's in Dec, 90 first published

Claims

1. be a kind of weighing apparatus that has two-sided scale and increase the title quality of thallium, profile is similar with existing steelyard, there are the arm beam of steelyard, two to carry knob, steelyard hook (or scale pan), swim thallium and increase thallium, it is characterized in that arm beam of steelyard surface respectively has an identical scale in the face of the buyer with the seller, the scale of scale be zero point knob and maximum weighing knob shared, zero point, the reading of knob and maximum weighing knob was marked in the upper and lower of scale respectively; Increase thallium 6 and be the end that is hung on the arm beam of steelyard.