FR2580393A1 - WEIGHING DEVICE, IN PARTICULAR FOR A PONDERAL CALIBRATION SYSTEM OF OBJECTS SUCH AS FRUIT, VEGETABLES AND THE LIKE - Google Patents

Abstract

WEIGHING DEVICE, ESPECIALLY FOR A WEIGHT CALIBRATION SYSTEM FOR OBJECTS OF VARIABLE SHAPES AND WHOSE CENTER OF GRAVITY CANNOT BE MOVED WITH PRECISION ACCORDING TO A GIVEN AXIS, IN PARTICULAR FOR WEIGHING FRUITS AND VEGETABLES, BY PERFORMING A REAL WEIGHT MEASUREMENT , CHARACTERIZED IN THAT IT INCLUDES: -A PLURALITY OF MOBILE BUCKETS 10, CARRYING THE OBJECTS TO BE WEIGHED, EACH BUCKET CONSISTING OF A CUP 12 MOUNTED AT ARTICULATION ON A TRACTION BRACKET 14 SO TO BE FITTED AT THREE POINTS X, Y , Z WHEN IT PASSES OVER THE WEIGHING PLAN, TWO OF SAID POINTS Y, Z BEING COMMON TO THE CALIPER AND TO THE CUP; - MEANS FOR MOVING THE BUCKETS 10, SO AS TO MAKE EACH BUCKET GO SUCCESSIVELY OVER THE WEIGHING PLAN, AND; A WEIGHING MECHANISM ON WHICH EACH BUCKET SLIDES SUCCESSIVELY, AND WHICH INCLUDES FOUR BUCKET P, P, P, P RECEIVING THE BUCKET SUSPENTING EFFORT, THE BUCKET BEING FIXED TOGETHER BY A LINK PLATE 32, A A 34 FORCE SENSOR THAT ANALYZES THE FORCE WHEN THE BUCKET PASSES.

Description

(i) FRENCH REPUBLIC (Publication No. 2,580,393)

  for the NATIONAL INSTITUTE orders the RECIPROCEMENT OF INDUSTRIAL PROPERTY (N) national registration. 85 02301 PARIS

i) nt C14: G 01 G 15/00, 17/00.

_. APPLICATION FOR PATENT OF INVENTION A1

  ) Date of deposit: February 18, 1985. Applicant (s): WHITE Philipe. -EN.

3 Priority:

(inventor (s): Philippe Blanc.

    Date of the public availability of the

  application: BOPI "Patents A No. 42 of 17 October 1986.

  (References to other national documents

: Holder (s)

    Attorney (s): Cabinet Armengaud Ainé.

  (Weighing device, in particular for weight calibration system of objects such as fruits, vegetables and the like.

  (5) Weighing device. in particular for a weighted calibration system for objects of variable shapes and whose center of gravity can not be moved accurately according to

  a given axis, in particular to weigh fruits and vegetables

  vegetables. performing a real weight measurement, characterized in that it comprises: x r x - a plurality of movable buckets 10. carrying the objects to be weighed, each bucket being constituted by a cup 12; mounted to articulation on a traction stirrup 14 so as to "rest at three points X, Y. Z during its passage on the plane i

  weighing, two of said points Y, Z being common to the stirrup X =.

  I and the cup: means for moving the buckets 10, so as to pass successively each bucket on the weighing plane, and:

  - a weighing mechanism on which slides successively

  Each bucket comprises four flails P1, P2, P3, P4 receiving the bucket lift force, the flails being secured together by means of a connecting plate 32 to a force sensor 34 which analyzes the effort during the passage of the <d scoop LD Sale of the fascicles to the NATIONAL IMPRIMERIE, 27. rue de la Convention -75732 PARIS CEDEX 15! i 2580393 The Ridtent Inven "is a device k péée pow 1-t ' Part I A weight calibration system for objects of viable form and whose cezr3e: ravis can not be moved with precision from a given axis.This intention applies more particularly, without there being any weighing of fruits, vegetables and similar objects.These devices of this type are currently used to measure

  torque caused by the object to be weighed and its position relative to the axis of traction.

  The device object of this invention does not use this technique, and it consists in measuring. the actual weight of the object, regardless of the location of the center of

gravity of the objects to be weighed.

  Accordingly, this invention relates to a weighing device,

  for a weighted calibration system for objects of variable shapes whose center of gravity can not be precisely moved along a given axis, in particular for weighing fruits and vegetables, by a real weight measurement, characterized in that it comprises: a - a plurality of mobile buckets carrying the objects to be weighed, each bucket being constituted by a cup mounted to pivot on a traction stirrup, so that it rests in three points during its passage on the plane; weighing, two of said points being common to the cup and the stirrup b - means for moving the buckets so as to bring each bucket successively on the weighing plane; and c - a weighing mechanism on which each bucket slides successively, and which comprises four flails receiving the lifting force of said bucket,

  these flails being fixed together by means of a connecting plate, to a cap-

  force meter which analyzes the force during the passage of said bucket.

  According to a feature of this invention, the lengths of the flails are

  calculated so that the passage time of each bucket is approximately

  the same as that during which the plagues receive no effort, from

  in order to allow a reset of the measuring car.

  Other features and advantages of this invention will be apparent from

  the description given hereinafter with reference to the accompanying drawings, which illustrate

  an exemplary embodiment devoid of any limiting character. On the drawings

  - Figure 1 is a perspective view of a bucket consisting of a cou-

shovel and its traction stirrup

25.80393

  FIG. 2 is a view of the door according to FIG. 1. FIG. 3 is a fifth part, which shows the position of the peel device showing the position of a bucket during of his pasSage On the weighing plan, and,

  Figure 4 is a plan view of Figure 3.

  As stated above, the weighing device according to this invention consists essentially of two parts: 1 - a plurality of buckets carrying the objects to be weighed, and which move in

  continuously in a horizontal path so as to move successively

  on a weighing plan; and, 2 - a weighing mechanism ensuring the measurement of the actual weight of the objects when

  the passage of each bucket on the weighing plane.

  A bucket will first be described with reference to Figures 1 and 2.

  Each bucket, designated as a whole by reference numeral 10, comprises

  two distinct elements: a cup 12 and a traction stirrup 14. The

  shovel 12 is in the form of a tray provided with a pressed receptacle 12 'receiving the objects to be weighed, this plate having tabs 16, 16' and

articulation points 18.

  Each traction yoke comprises two arms 20, 20 ', connected by a rigid rod 22 of axis XX and by a profile 24. Each arm 20, 20' has, at one of its ends, a circular opening 26, 26 'Engaging on a drawbar of AA' axis (to simplify the drawing, the drawbar was not shown). The cup 12 is mounted on the traction yoke 14 in the manner illustrated in FIG. 2, the hinge points 18 of the cup resting on the rod 22, and the lugs 16, 16 'being engaged on the profile. 24 of the stirrup. The arrangement is such that the cup 12 is articulated at X on the yoke 14, so that it rests at three points on the weighing plane: - a point on the X axis, and two points Y and Z , in order to be able to measure

  the actual weight of the objects positioned in the receptacle 12 'of the cup.

  The weighing mechanism (FIGS. 3 and 4) comprises a series of guides 28, 28 ', 30, 30', ensuring a leveling of the friction parts of the buckets

  when they move continuously, according to the arrow F, to pass suc-

  terminally at the weighing station. The weighing mechanism further comprises four weighing beams P1, P2, and P3, P4. The weighing flails P1 and P2 receive the loading force of the X axis, it being understood that most of them are located on only one point of this X axis in X or X), and in In the case of 6Smps, the weighing lines P and P receive the points Y and Z. On oh ih-ika * mi two possible support triangles: X YZ, or X YZ,

  in the weighing plan, which has no influence on the weighing result.

  Indeed: the traction stirrup 14 transmitting only an almost horizontal force, equal to the friction, the advancement of the bucket 10 on the weighing system, only part of the mass of the caliper applies a considerable effort on the X axis, which should be subtracted from the weighing result (as well as the tare represented by the cup), in order to obtain the actual weight of the objects placed on the cup. that is the position of the center of gravity of the whole bucket 10 + object which it contains, inside the triangle of levitation X1YZ

  or X2YZ, one can always establish a measure representative of the weight of the ob-

  jet. According to the invention, the arrangement of the guides 28, 28 'and 30, 30' is such that the passage of the buckets 10 on the weighing beams P1 to P is effected with the following elements.

  vertical dynamic effects as low as possible.

  The four beams P1 to P4 are fixed together, by means of a connecting plate 32, on a force sensor (of the strain gauge type, for example) which analyzes the force during the passage of a bucket 10. on the weighing plan. The lengths of the plagues are calculated so that the passage time of each

  bucket 10 is substantially the same as the time during which the plagues

  This last period is put to use by the processing system to align the measuring system with a floating zero, of the type known as "automatic zeroing". As we see on the

  drawing, this characteristic results in an offset arrangement of the flails.

  It remains understood that this invention is not limited to the example

  embodiment described and shown, but encompasses all variants.

1r 2580393

Claims (4)

claims   1 - Weighing device, in particular for a weighted calibration Syssnme   for objects of variable shapes whose center of gravity can not be de-   placed precisely along a given axis, especially for weighing fruits and vegetables   vegetables, by carrying out a measurement of real weight, characterized in that   takes - a plurality of movable cups (10), carrying the objects to be weighed, each cup being constituted by a cup (12) hingedly mounted on a traction stirrup (14) so as to rest at three points (X, Y, Z) during its passage on the weighing plane, two of said points (Y, Z) being FI common to the stirrup and the cup;   means for moving the buckets (10) so as to pass succes-   endlessly each bucket on the weighing plane; and, / - a weighing mechanism on which each bucket slides successively,   and which comprises four flails (Pl1, P2, P3, P4) receiving the effort of sus-   temptation of the bucket, the flails being fixed together, using a plate   link (32). a force sensor (34) which analyzes the force during the step wise of the bucket.   2 - weighing device according to claim 1, characterized in that the lengths of said flails (P1, P2, P3, P) are determined so that the passage time of each bucket (10) is approximately the same as the time during which these plagues receive no effort, so as to allow   a reset of the measurement chain.   3 - weighing device according to one of claims 1 or 2, characterized   in that the weighing mechanism comprises guiding means (28, 28 ', 30, 30') ensuring a leveling of the friction parts of the buckets (10), so that the passage on the weighing beams is carried out with dynamic efforts   verticals as low as possible.   4 - weighing device according to any one of the preceding claims   dentes, characterized in that the force sensor (34) is a strain gauge. 0393 1'2 14o. i G.2 ri r. / 1 - 24 --- 22X 20   IX, f * "'coo J-0z tz AGZdAxS; g18 N. E s / \, W ,,> w 1 // u | 2, Z'