DE2145630C - Weighing bridge on electro-mechanical or electronic belt scales with three resilient rods running parallel to the conveying direction - Google Patents

Description

On the basis of FIG. 1 and 2 of the drawing, the invention is explained in more detail below.

It shows

1 shows a weighing bridge designed according to the invention in perspective and

FIG. 2 shows the weighing bridge according to FIG. 1 in a side view on average.

The weighing bridge is denoted generally by 1. The weighing bridge I consists essentially of a stationary frame 2, a traverse 3 fastened to the frame 2, a movable traverse 4, resilient rods 5, 6 and 7 and a load cell 8 with a coupling member 9. With the cross member 3 are supports 10 and 11 rigidly connected, at the ends of which one ends of the rods 5 and 6 are attached. The others Ends of the rods 5 and 6 are attached to supports which are rigidly connected to the traverse 4 and from which only one, labeled 12 support is shown is. The rod 7, which essentially absorbs the vertically directed forces, is at one end in » a bearing Ϊ3 firmly clamped, which is rigidly connected to the traverse 3. The other end of the The rod 7 is firmly clamped in a bearing 14 which is rigidly connected to the cross member 4.

Bars S and 6 never consist of a profile with eii? Äigeni cross section. On, the middle parts 50 and 60 of bars 5 and 6, respectively, close sides 51 and 52 or 61 and 62. The side parts 51, 52 and 6 !, 62 lie in approximately vertical planes.

In the area of the clamping points 15, 16 and I Πgrasen the sides 51, 52 and 61, 62 of the rods 5 and 6 respectively on opposite sides to the longitudinal axis of the rods Make cuts UT or 19 on d.e Separate the soaps up to the middle part 50 or 60 of the profile of the bars 5 and 6, respectively. Opposite each other Incisions create bending lines for the middle parts the bars. The imaginary flexures are »n FiH I of the drawing indicated by dash-dotted lines.

In order to allow a certain rotation of the spring system or the weighing bridge system, the sides 52 and 61 of the rod 5 and 6 each have a small incision 20 and 21 a-.f, the one in the vicinity d, fixed clamping points 15 or 16 provided, ν This ensures that even in the event of twisting of the weighing bridge system, this Vcrdn t mi takes place in a predetermined manner and that the clamping points have no or almost germ-r influence on this.

1 sheet of drawings

Claims (2)

of the third bar in the vertical direction by a large number of times * is greater than that in f ^ jf ^ f ^? "; the moments of resistance of the other two bars. 1. Wiegebrikkc an electromechanical or such a weighing bridge is in the German Auselektronische Belt scales with three parallel 5 legeschrift 1 549 161 bescnrierjeu. Resilient rods running to the conveying direction The well-known Wieg bridge has against, earlier ones are provided, which at one end with an embodiment of W.egebrucken have the advantage of extending perpendicular to the conveying direction that during the adjustment essentially only the art-resistant cross member or. The like. And at the other end a third rod needs to be taken into account with regard to a movable spring constant from the load in vertical io ner spring constants and its temperature response. Direction deflected, the conveyor belt Abstüt- With a view to the inclusion of vertically directed Zenden frame or the like. are firmly connected, the forces are the effect of the other two, in an operative connection with a stationary load cell to the conveyor belt parallel running fcbenc, and of which two rods symmetrical to the ordered rods are not significant, essentially serve the middle of the conveyor belt in one to the conveyor belt 15 these two rods are arranged only to twist em parallel running.-nd the plane of the WiegebrlkU :: ν H-ms by not mtttig am · ™, while the third rod about the middle of the fende forces, u \ cr! i ,: utern h / w. to reduce to a small N Λ conveyor belt running in a further level I:; ■ m: 'this weighing bridge / u rc;
is arranged, whereby the in a / to convey- du / baren MvUtV.imssen / u must get 0 band parallel running plane arranged 20 clamping points d..v Sui »e extremely carefully and ν, i-rods in the vertical direction a little and transversely come gleiv.liar ··. ' be unguided. This creates difficulties for this direction as well as for the conveying direction! Im with relatively h. «.,, Have a high section modulus, and at a cost ve. · Dogs. of the section modulus of the third rod in The present invention is the object. vertical direction is many times larger a ₅ reasons, the mentioned difficulties with the Λ .. than the extension of the tensioning points for the bars in this direction. Moments of inertia 1 of the other two bars, d a - den. characterized by da3 the two According to the invention, this object is achieved * - .. • the first mentioned bars (5 and 6) from a profile that the first two bars from a Pn H with an approximately U-shaped cross-section, des- consist of an approximately U-shaped cross-section, de · .- '"-, sen sides (51, 52 or 61, 62) are approximately vertical sides in approximately vertical planes and weklie Levels are and which bars are in the area of the bars in the area of the clamping points at transverse / ur Clamping points (15, 16, 17) at transversely to the longitudinal longitudinal axis of the rods opposite one another axis of the rods have incisions opposite each other, which the sides up to / around Places have incisions (18 or 19) that separate the middle part of the profile. A-jf reason of the gi- the sides up to the middle part (50 or 60) of the selected profile are initially vertical cut the fils. Direction a very high resistance or inertia 2. Weighing bridge according to Claim 1, characterized in that the moment is reached with regard to bending loads indicates that one rope (52 or 61) each of the entire spring system. As a result of in the area Rod (5 or 6) a further incision (20 40 of the clamping points lying, a predetermined or 21), which in the vicinity of the incision in the area spaced from one another The clamping sides of the profile of the rods lying on the stationary traverse (3) become defined bending points (15 or 16) is provided. nien created for the bars, so that the quality or Embodiment of the clamping points for the rods 45 no longer have any influence on the measurement results can. The manufacturing costs for such a weighing bridge are below those of the known weighing bridge, because making the incisions in the The invention relates to a weighing bridge. The sides of the bars are much easier to carry out on electromechanical or electronic belts than the exact and similar formation of the initial weights, in which three bracing points parallel to the conveying direction in the known weighing bridge,
running resilient rods are provided, which at the known weighing bridge hardly occurs one end with a twisting of the spring system that is worthy of note perpendicular to the conveying direction, as well extending stationary traverse od. Like. And long the forces emanating from the conveyor belt at the other end with a movable one, of which 55 is too eccentric on the spring system or on the weighing load deflected in the vertical direction attack the conveyor bridge system. However, so must the bars tape supporting frame or the like firmly connected that they are a twisting of the weighing, which enable in operative connection with a stationary bridge system, because otherwise uncon-measuring cell and of which two bars can be symmetrized compressive and tensile stresses in and on trisch to the center of the conveyor belt in a to the conveying 60 the rods occur due to the warping of the the band extending plane are arranged, while cross-sections of the rods. To with the invention the third rod roughly under the middle of the conveyor weighing bridge a twisting of the weighing bridge belt to enable arranging systems or spring systems running in a further level is shown in is net, with the in a parallel to the conveyor belt advantageous development of the idea of the preceding Plane arranged rods in vertical 65 lying invention proposed that each one side Direction a small and transversely to this direction each rod has a further incision, the sov-e to the conveying direction a high resistance mo- tor in the vicinity of that in the area of the fixed traverse have ment, and at which the moment of resistance lying clamping point is provided.