EP0418981A1 - Rollensiebeinheit - Google Patents

Rollensiebeinheit Download PDF

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Publication number
EP0418981A1
EP0418981A1 EP90202494A EP90202494A EP0418981A1 EP 0418981 A1 EP0418981 A1 EP 0418981A1 EP 90202494 A EP90202494 A EP 90202494A EP 90202494 A EP90202494 A EP 90202494A EP 0418981 A1 EP0418981 A1 EP 0418981A1
Authority
EP
European Patent Office
Prior art keywords
roller
screen unit
roller screen
rollers
unit according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90202494A
Other languages
English (en)
French (fr)
Inventor
Hendrik Pastoor
Jan Middel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zijlstra and Bolhuis BV
Original Assignee
Zijlstra and Bolhuis BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zijlstra and Bolhuis BV filed Critical Zijlstra and Bolhuis BV
Publication of EP0418981A1 publication Critical patent/EP0418981A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4636—Regulation of screen apertures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens

Definitions

  • the present invention relates to a roller screen unit for agricultural products comprising a plurality of elongated rollers rotatably mounted between supporting arms at mutual intervals and parallel to each other.
  • roller screen units are used, e.g., in bulk bins for potatoes.
  • a bulk bin for agricultural products provided with a roller screen is known from European patent 0 101 637.
  • This prior bulk bin comprises a bottom slanting upwardly and capable of conveying agricultural products, such as potatoes, upwards to a substantially horizontal roller screen.
  • the rollers of the roller screen extend transversely to the direction of transport and are mounted between supporting arms.
  • the supporting arms are preferably of such construction that the distance between successive rollers can be varied.
  • the supporting arms may be of (semi-)lazy tongs construction, as also described in European patent 0 101 637.
  • a drawback of the prior roller screen units sometimes felt in practice resides in that replacement of the rollers is not easy. Sometimes, for instance, it is necessary to replace a damaged roller or it is advisable to replace the rollers by rollers of another type, such as spiral rollers, sorting rollers or star rollers. In the case of the prior roller screen units it is then often necessary to largely disassemble and subsequently reassemble the roller screen unit, e.g., when the rollers are carried in parts of the supporting arms by means of journals etc. formed at the roller ends.
  • roller screen unit of the above type is characterized in that the rollers are separable rollers each comprising two end portions, which are each carried in a supporting arm section, and at least one central portion detachably mounted between the end portions.
  • the bulk bin diagrammatically shown in Fig. 1 in side-­elevational view comprises a frame 1, which is mobile owing to the provision of wheels 2 and a drawbar 3.
  • the bulk bin proper is formed by upright sidewalls 4,4′, between which is disposed an endless conveyor bottom having an elevation path slanting upwards and a lower return part designated by 5.
  • the conveyor bottom is driven by a drive unit 6 arranged adjacent to the upper end of the elevation path.
  • a roller screen unit Disposed beyond the upper end of the elevation path is a roller screen unit, diagrammatically shown at 7.
  • a transverse conveyor 8 Disposed underneath the roller screen unit is a transverse conveyor 8 for discharging material passed through the roller screen unit.
  • the rollers of the roller screen unit are driven in such a manner that the products are transported by the rollers to a second transverse conveyor 9 capable of transporting the products further.
  • Fig. 2 shows a diagrammatic exploded view of an example of a roller screen unit.
  • the roller screen unit shown comprises a plurality of rollers 10 each provided with a sprocket 11 capable of cooperating with a drive chain, not shown, arranged to rotate the rollers.
  • the shafts of the rollers are secured at both ends to the free ends of strips 12 through 16 of various lengths, which, together with a connecting strip 17, form a composite mechanism 18, (semi-)parallelogram mechanism or an arm of (semi-)lazy tongs construction.
  • One end 19 of the connecting strip is fixedly, but pivotally connected to a fixed frame member 20. In the embodiment shown, this end 19 is adjacent to the roller located closest to the conveyor bottom (on the right-hand side in Fig. 2).
  • the adjustment of the mutual spacing between the rollers is effected by moving the shaft of one of the other rollers, preferably the shaft of the roller located closest to the product conveyor 9 (on the left-hand side in Fig. 2), transversely to its longitudinal direction. Owing to the operation of the above composite mechanism 18 the other rollers will then be moved as well, and the interspace is changed.
  • Fig. 3 diagrammatically shows, in top view, an example of a roller screen unit according to the present invention.
  • the unit shown comprises seven rollers 30 through 36 mounted between two supporting arms 36 and 37.
  • the supporting arms are preferably of (semi-)lazy tongs construction or telescoping arms or the like, so that the interspace between successive rollers is adjustable.
  • operating means not shown in Fig. 3, are present, which, if required, may also comprise means for continuously varying the spacing between the rollers during operation, as described in European patent 0 101 637.
  • Rollers 30 through 36 are carried in supporting arms 37, 38 by means of journals 40.
  • Fig. 3 diagrammatically shows a drive motor 39 driving roller 32.
  • the two journals of roller 32 are provided with sprockets 41, 42 or pulleys located outside the supporting arms and designed for plain or toothed belts or ropes.
  • the driven sprockets 41, 42 drive, by means of chains or the like, idler sprockets and sprockets mounted on the journals of the other rollers.
  • Fig. 3 clearly shows that replacement of the rollers is possible only if at least one of the supporting arms is detached completely, which is very time-consuming in a practical situation.
  • separable rollers comprising two end portions, which show the two journals, and at least one central portion detachably mounted between the end portions.
  • the separation between the central portion and the end portions may be effected in different places, e.g., in the roller proper, as indicated in roller 30 by broken lines 43, or in the journals, as indicated at 44 for roller 31, yet in a practical embodiment the separation can advantageously be effected at the junction between the journals and the roller body proper.
  • FIG. 4 An example of a practical embodiment is diagrammatically shown in Fig. 4 in vertical section.
  • Fig. 4 shows a bearing bush 50, in which are disposed one or more bearings 51.
  • a journal 52 of a roller 53 extends through the bearings.
  • the bearing bush comprises a chamber containing bearing 51 and closed in this example by a spring washer 54 or the like.
  • the spring washer also engages in a groove in journal 52 and thus determines the position of the journal in the axial direction.
  • the bearing bush further has a portion having a smaller diameter 55 on the side away from the roller.
  • a bush 56 which may be made of, e.g., a suitable plastics material, the portion having a smaller diameter is carried in sections 57, 58 of a supporting arm, e.g., of a lazy tongs construction.
  • a sprocket 60 is mounted by means of a key 59.
  • the bearing bush further carries strips 61 capable of being coupled to an operating means, e.g., a telescopic tube, for varying the distance between the rollers.
  • an operating means e.g., a telescopic tube
  • journal 52 is provided at the end facing roller 53 with a concentric ring 62 fixedly secured to the journal.
  • Ring 62 is provided with a plurality of bores 63, so that by means of bolts 64 and corresponding threaded bores 65 the ring can be held against the end face 66 of roller 53.
  • roller 53 is a hollow roller with inserted end portions 67 containing the threaded bores 65.
  • the rollers may also be massive.
  • rings 62 can be welded to the journals, as shown in Fig. 4. In principle, it is sufficient to secure the rings against rotation about the journals. Consequently, the rings may also be axially slidable on the journals by means of one or more keys or keyways.
  • central portion may be provided with journal ends extending, in mounted arrangement, through the bores in rings 62.
  • the rollers may be of any type, such as massive or hollow rollers, plain rollers, spiral rollers, presorting rollers having a profiled shape, such as the so-called diabolo rollers, steel rollers, plastics rollers etc.

Landscapes

  • Rollers For Roller Conveyors For Transfer (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP90202494A 1989-09-21 1990-09-20 Rollensiebeinheit Withdrawn EP0418981A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902363 1989-09-21
NL8902363A NL8902363A (nl) 1989-09-21 1989-09-21 Rollenzeefinrichting.

Publications (1)

Publication Number Publication Date
EP0418981A1 true EP0418981A1 (de) 1991-03-27

Family

ID=19855340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202494A Withdrawn EP0418981A1 (de) 1989-09-21 1990-09-20 Rollensiebeinheit

Country Status (2)

Country Link
EP (1) EP0418981A1 (de)
NL (1) NL8902363A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995001846A1 (en) * 1993-07-05 1995-01-19 Luossavaara-Kiirunavaara Ab Roll screen with variable aperture
NL1020255C2 (nl) * 2002-03-26 2003-09-29 Bollegraaf Beheer Appingedam B Scheidingsinrichting.
CN101596485B (zh) * 2009-06-29 2011-07-06 中冶长天国际工程有限责任公司 一种杂物分离装置及杂物分离方法
CN113751302A (zh) * 2021-09-16 2021-12-07 图布新 一种机械加工用便于维修和更换的辊筛连接固定装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1651622A (en) * 1926-10-18 1927-12-06 Joseph T Norman Separator roller and bearing therefor
US4034837A (en) * 1975-11-07 1977-07-12 Hi-Hard Rolls, Inc. Conveyor roller structure
US4311242A (en) * 1981-01-29 1982-01-19 Taconite Engineering & Manufacturing Co. Bearing cartridge supports for roll screens and the like
EP0101637A2 (de) * 1982-08-18 1984-02-29 Zijlstra & Bolhuis B.V. Schüttgutbunker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1651622A (en) * 1926-10-18 1927-12-06 Joseph T Norman Separator roller and bearing therefor
US4034837A (en) * 1975-11-07 1977-07-12 Hi-Hard Rolls, Inc. Conveyor roller structure
US4311242A (en) * 1981-01-29 1982-01-19 Taconite Engineering & Manufacturing Co. Bearing cartridge supports for roll screens and the like
EP0101637A2 (de) * 1982-08-18 1984-02-29 Zijlstra & Bolhuis B.V. Schüttgutbunker

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995001846A1 (en) * 1993-07-05 1995-01-19 Luossavaara-Kiirunavaara Ab Roll screen with variable aperture
AT405027B (de) * 1993-07-05 1999-04-26 Luossavaara Kiirunavaara Ab Rollsieb mitveränderbarer sieböffnung
DE4494936C2 (de) * 1993-07-05 2002-07-11 Luossavaara Kiirunavaara Ab Ki Walzensieb mit variabler Öffnung
NL1020255C2 (nl) * 2002-03-26 2003-09-29 Bollegraaf Beheer Appingedam B Scheidingsinrichting.
EP1348491A1 (de) * 2002-03-26 2003-10-01 Bollegraaf Beheer Appingedam B.V. Trennvorrichtung
CN101596485B (zh) * 2009-06-29 2011-07-06 中冶长天国际工程有限责任公司 一种杂物分离装置及杂物分离方法
CN113751302A (zh) * 2021-09-16 2021-12-07 图布新 一种机械加工用便于维修和更换的辊筛连接固定装置

Also Published As

Publication number Publication date
NL8902363A (nl) 1991-04-16

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