Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01G—WEIGHING
  • G01G21/00—Details of weighing apparatus
  • G01G21/02—Arrangements of bearings
  • G01G21/10—Floating suspensions; Arrangements of shock absorbers
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01G—WEIGHING
  • G01G21/00—Details of weighing apparatus
  • G01G21/24—Guides or linkages for ensuring parallel motion of the weigh-pans

Definitions

• the invention is based on a holding device for a load carrier of a balance which cooperates with a load cell and is guided in parallel, the holding device on the other hand being attachable to a supporting frame by means of two resilient handlebar pairs arranged horizontally one above the other.
• a holding device of the type mentioned above for a filling scale is described, for example, in DE-A-32 21 062. It essentially consists of several angle iron pieces, one of which is attached to the load carrier, for example in the form of a load, and the other to the frame or chassis of the scale. The angle iron pieces are then connected to one another by means of an upper and a lower pair of links made of spring metal, so that the load carrier is suspended in parallel on the frame or chassis.
• An electromagnetic force sensor which interacts with the load carrier serves to determine the desired filling quantity in the load vessel. Such force sensors have long been used in filling, bagging and dosing technology.
• the object of the invention is therefore to provide a holding device of the type mentioned in the introduction, which enables a quick, reproducible and readjustable adjustment of the load carrier on the frame carrying it and which at least minimizes the disturbing influences occurring during weighing.
• the holding device mentioned at the beginning has a device for inclining at least one pair of links that can be connected to it in the vertical direction.
• a preferred embodiment of the holding device according to the invention is that the latter has a coherent body and means for its contraction and / or distraction, which are incorporated into the body in such a way that they shorten or lengthen the body in its vertical direction, causing an inclination of at least one of the horizontal handlebar pairs.
• the holding device can have at least two arms extending essentially in its longitudinal plane, a contraction / distraction unit being provided in each arm.
• Each of these units consists, for example, of an opening in the relevant arm of the aforementioned body to form arm regions which can be changed in length, and of a screw body which crosses the arm region which can be changed in length and the opening.
• This solution enables a simple and quick adjustment of the parallel load carrier of a balance, the adjustment being reproducible and thus also able to be carried out or repeated afterwards if an adjustment or inaccuracy of the load carrier has been determined. It is only necessary to use a wrench to turn the respective adjusting screw in the elastically deformable arm region (s) of the holding device in order to elastically deform the arm region in question, so that this arm region lengthens or shortens. Length changes in the tenths of a millimeter range are achieved, but these represent a considerable adjustment range. Due to the special inclination of one pair of handlebars, e.g. of the lower pair compared to the upper pair of links, it is also achieved that the pouring error, that is to say the distribution error, of the bulk material introduced into the bulk container does not, or no longer, has a false effect on the sensitive electromagnetic force sensor.
• FIG. 1 shows a side view of the exemplary embodiment
• FIG. 2 shows a greatly enlarged detail of the exemplary embodiment according to FIG. 1 in a side view
• FIG. 3 shows a front view of the exemplary embodiment
• FIG. 4 shows an enlarged view of the detail X in FIG. 3.
• a load carrier 1, e.g. a load vessel is suspended from a conventional frame 3 or chassis by means of a holding device 2.
• the device 2 comprises a holding body 4 and an upper, conventional pair of links 5 and a lower, conventional pair of links 6.
• the paired link arrangement can be seen more clearly in FIG.
• the device 2 also comprises holding means 7, which can be of any design, but can also largely be constructed as described in connection with the holding body 4 to which the load carrier 1 is fastened. In the case shown here, the holding means 7 largely coincide with the holding body 4.
• the handlebar pairs 5 and 6 consist in the usual way of leaf spring elements 8, which are connected by means of screw connections 9 in each case above and below to the holding body 4 and the holding means 7. -
• stiffening they can be provided with stiffening pieces 10 in the usual way.
• the stiffening pieces can also be omitted;
• the spring elements 8 are made very short, so that there is a relatively short distance between the holding body 4 and the holding means 7, which is only so large that only one electromagnetic force sensor 11 can be accommodated between the parts 4 and 7.
• This sensor is actuated in the usual way via an arm or the like of the holding body 4.
• the holding body 4 is provided, for example, in its upper region with a device 13 for inclining at least one pair of links 5 or 6 in the vertical direction.
• This device 13, which is only symbolically indicated in FIG. 1, consists of means for contraction or distraction of the connected body 4.
• Device 13 is a shortening or lengthening of the body 4 in the vertical direction, so that thereby at least one pair of links is inclined.
• FIG. 2 shows that the lower pair of links 6 is at an angle .alpha
• Adjustment is inclined downwards.
• the body 4 is lengthened or shortened essentially in the tenth of a millimeter range, so that the schematically indicated angle o is likewise correspondingly small.
• the connected body 4 which has a plurality of threaded bores 14 for fastening the load carrier 1, consists of a central part 15, from which two arms 16 each extend upwards and downwards, at the ends of which the leaf spring elements 8 are clamped. At least two arms 16 are each provided with a contraction / distraction unit 13, as shown in FIG. 3. In this case it is the upper arms 16; if desired, alternatively or additionally, the lower arms 16 can also be equipped with corresponding units 13.
• FIG. 4 One of the aforementioned units 13 is shown in detail in FIG. 4. It can be seen that an opening 17 of approximately rectangular shape is provided in the arm 16, in order thereby to form a length-adjustable arm region 18 with the sections 18a and 18b. These sections in turn each have two and preferably obliquely running deformation points 20.
• This arm area and the opening 17 are by a screw device 19, for example, a screw body in the form of a head screw made of steel, which is in threaded engagement with a remote section 18a of the area 18 via a threaded pitch 18c, as shown in FIG. 4.
• the opening 17 is rounded in its corner regions so that the deformation points 20 with a small cross section are formed in the arm region 18.
• Handlebar pair 6 is achieved down.
• a nut can alternatively also be provided on the corresponding thread of the screw body 19.
• the head end of the screw body can be in this
• Case can be designed as desired, but so that twisting of the screw body is prevented when tightening the nut.
• a through hole is also provided here.
• two screws can also be provided (not shown).
• the through hole 18d opposite in the line of alignment in the arm section 18b is also designed as a threaded hole 18e.
• Each of the two Arm sections contain a screw body, such as a cap screw. While the heads of these screws are located laterally outside the sections 18a, 18b, the other ends of the screws abut against one another within the opening 17. By correspondingly tightening the cap screws they press against each other, whereby the sections 18a, 18b are moved according to the arrows 21, so that the arm region 18 is elongated in the direction of the arrows 22.
• the arms 16 concerned can be shortened or lengthened compared to their initial length, according to the other two embodiments, the arms 16 can only be shortened to the extent that these arms have been lengthened.
• the holding device 2 can be adjusted in a simple, quick and reproducible manner by corresponding actuation of the screw body or screws 19. Good results have been achieved if the width and height dimensions of the interconnected body 4 correspond approximately to the same dimensions of the load carrier 1 on the side that is connected to the body 4.
• a particularly simple and cost-effective production of the coherent body consists if it consists of a single piece of a cast metal body. This is preferred
• the holding means 7 mentioned further above have no contraction / distraction units.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optical Measuring Cells (AREA)
• Clamps And Clips (AREA)
• Measurement Of Force In General (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6457287

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (2)

Citations (4)

Family Cites Families (2)

• 1992
  • 1992-04-23 DE DE19924213308 patent/DE4213308A1/de not_active Ceased
• 1993
  • 1993-04-21 MX MX9302306A patent/MX9302306A/es unknown
  • 1993-04-22 WO PCT/DE1993/000358 patent/WO1993022635A1/de active Application Filing

Patent Citations (4)

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