EP0167999B1 - Screen bottom - Google Patents

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Publication number
EP0167999B1
EP0167999B1 EP85108325A EP85108325A EP0167999B1 EP 0167999 B1 EP0167999 B1 EP 0167999B1 EP 85108325 A EP85108325 A EP 85108325A EP 85108325 A EP85108325 A EP 85108325A EP 0167999 B1 EP0167999 B1 EP 0167999B1
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EP
European Patent Office
Prior art keywords
screen
bottom according
profiled member
screen bottom
profiled
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.)
Expired
Application number
EP85108325A
Other languages
German (de)
French (fr)
Other versions
EP0167999A2 (en
EP0167999B2 (en
EP0167999A3 (en
Inventor
Wolfgang Lehmann
Siegfried Schroeter
Christian Neukam
Horst Krüger
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.)
HEIN, LEHMANN TRENN- UND FOERDERTECHNIK GMBH
Original Assignee
Isenmann Siebe GmbH
Hein Lehmann AG
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Publication date
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Application filed by Isenmann Siebe GmbH, Hein Lehmann AG filed Critical Isenmann Siebe GmbH
Priority to AT85108325T priority Critical patent/ATE37149T1/en
Publication of EP0167999A2 publication Critical patent/EP0167999A2/en
Publication of EP0167999A3 publication Critical patent/EP0167999A3/en
Application granted granted Critical
Publication of EP0167999B1 publication Critical patent/EP0167999B1/en
Publication of EP0167999B2 publication Critical patent/EP0167999B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B07B1/4645—Screening surfaces built up of modular elements
    • 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
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/02—Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces

Definitions

  • the invention relates to a screen covering with screen elements arranged side by side, which are interchangeably fastened to a supporting substructure by additional plastic profiles, the profiles holding two lateral edges of adjacent screen elements and having projections on their underside which are latched to the substructure, the screen elements being Completely cover the profiles at the top.
  • Such a screen covering is known from WO-A-8 402 290.
  • This known construction leads to a large height of the sieve bottom and does not allow easy assembly and disassembly.
  • these profiles require protruding reinforcement parts of the sieve elements in order to be able to attach the sieve elements to the substructure through the profiles.
  • the object of the invention is to improve a screen covering of the type mentioned in such a way that, with a particularly secure hold, simple assembly and disassembly and with a low overall height of the screen bottom, the intermediate element - profile - is not exposed to wear and the screen elements during manufacture are simple.
  • this object is achieved in that the screen elements are fastened in a form-locking manner with a lower, recessed area of their end faces to the profiles.
  • Such a construction leads to a particularly secure hold, to simple assembly and disassembly and to a low overall height of the sieve plate.
  • the screen elements alone are exposed to the screenings.
  • the sieve elements are protective over the profiles that are used to attach the sieve elements to the substructure. The material of the profiles can thus be aligned solely with the holding function, so that a compromise between a material for an optimal holding function and optimally low wear need not be sought.
  • Profiles and sieve elements are particularly easy to assemble, especially since there is no need to ensure that they fit perfectly into individual openings in the substructure. Disassembly is also particularly easy to do.
  • the large contact surfaces of the profiles on the substructure and on the sieve elements reliably prevent longitudinal displacement of the sieve elements and the profiles.
  • fastening elements do not form any projections over the upper sieve surface, since in the area of the profiles the upper side of the sieve elements runs continuously without recesses and / or elevations.
  • the profile laterally have at least one projection, in particular at least one tooth, which lies in a correspondingly shaped recess on the end face of the screen elements.
  • the projections and recesses can be shaped such that a greater force can be transmitted to the profile in the pulling direction of the sieve element upwards than in the downward pressure direction. This creates a particularly secure hold, with assembly and disassembly being even easier.
  • the projections and recesses can be sawtooth-shaped, the steeper flanks of the projections of the profile facing the upper side of the sieve elements. It is also proposed that the projections and recesses run over the entire length of the profile and two side edges of the screen element.
  • a bar approximately horizontally on both sides, which covers the top of the substructure.
  • the free end of the bar can be angled downward in an approximately L-shaped manner and, with this area, protectively overlap the upper part of the side wall of the profile of the substructure to which the plastic profile is held.
  • the top of the bar can also protrude upwards on the outer edge Form a lip that rests tightly on the underside of the sieve element when the strip is under tension.
  • the profiles have two recesses on the top, in particular two grooves running along the profile, and that a recess or groove has a correspondingly shaped projection on the underside of a screen element and into the other recess or groove, a correspondingly shaped projection engages on the underside of the adjacent screen element.
  • the outer vertical side wall of the groove can be aligned with the free, angled down end of the strip.
  • the profile has two longitudinal parallel grooves on the underside into which two free legs of the substructure engage.
  • the profile is formed by a laterally protruding area of the adjacent sieve element, in particular a sieve element located at the edge of the sieve covering.
  • the profile can be formed from a laterally protruding area of a lateral edge part of the sieve plate, so that a secure and tight edge closure of the sieve plate is achieved.
  • a sieve tray 1 is composed of individual rectangular sieve elements 2, the length of which is at least twice as large as the width.
  • the sieve elements extend between the two vertical side walls 3 of a sieving machine and consist of plastic.
  • the end faces 4 of two adjacent screen elements lie close together in the upper region. In the area underneath, the end faces 4 jump back to form recesses 5.
  • the recessed areas 5 of two adjacent screen elements 2 form a space below the abutting end faces 4 in which the upper area of a plastic profile 6 lies.
  • the profile 6 extends over the entire length of the longer sides of the sieve elements 2 and forms projections or teeth 7 in the upper region, which engage in a form-fitting manner in correspondingly shaped recesses 8 in the recessed regions 5.
  • the upper area of the profile 6 corresponds in size to the space formed by the area 5 between two adjacent screen elements 2. Below this, the profile 6 forms two strips 10 projecting on both sides, which are arranged horizontally and with their upper side on the underside 11 of the screen elements 2 issue.
  • the longitudinal strips 10 lie with their underside on a U-shaped steel profile 12, the upwardly facing legs of which are bent inwards and thus form a gap-shaped opening 13 at the top, into which a strip-shaped projection 14 of the profile 6 extends. In order to allow the projection 14 to hold in place, in the inserted position at the height of the opening 13 it is approximately the width of the opening and below it has a larger cross section.
  • the profile 6 has no influence on the shape of the top 16 of the screen elements 2, so that the top 16 can be flat.
  • the openings in the sieve elements 2 for the material to be sieved are not shown.
  • the horizontal strips 10 can be bent downwards at right angles at their free ends and thus partially encompass the outer sides of the U-profiles 12.
  • the strips 10 are thus L-shaped in cross section.
  • the free ends of the strips 10 have upwardly directed lips 17 which extend along the profile 6 and press against the underside of the sieve elements 2.
  • the exemplary embodiment shown in FIG. 3 differs in that the upper region of the profile 6 does not have a plurality of longitudinally extending horizontal teeth as in FIG. 1, but only a single tooth-shaped projection 7a on each side, each of which is in a corresponding recess 8a the face of the screen element.
  • the profiles have two longitudinal grooves 18 on the upper side, into which strip-shaped projections 19 protrude, which are formed on the undersides 11 of the sieve elements 2.
  • lip-shaped profiles can also protrude further on the undersides 11, which surround the profile 6 on the outside.
  • the area of the profile 6 which remains between the two grooves 18 and which projects upwards lies, like the upper area of the profile 6 in the exemplary embodiment according to FIG. 1, in recessed areas 5 of the end faces of the screen elements.
  • the profile 6 according to FIG. 4 thus has parallel parallel grooves 20 on the underside 2 into which the two free legs of the U-profile 12 protrude.
  • the profile 6 can also be formed on the long side of a sieve element, so that sawtooth-shaped projections are only required on one side of the profile.
  • This embodiment is also particularly suitable for fastening sieve elements in the edge region of a sieve bottom. This is shown on the left in FIG. 1.
  • the free edge of the screen element 2a is clamped between a lower L-shaped profile 21 made of steel and an upper plastic strip 22.
  • a conventional sieve element 2 can also be attached to the edge of the sieve bottom, as is shown on the right-hand side of FIG. 1. For this purpose, half a profile 6 is pushed into a half profile 12 in a latching manner.
  • FIG. 6 A further alternative method of fastening the sieve elements in the edge region is shown in FIG. 6.
  • a side plastic profile 23 of greater height than width has in the lower region a half-molded profile 6 on which a conventional sieve element 2 is held in the same manner as in FIG. 1 is shown on the right. This reduces the number of parts to be assembled and reliably protects the side wall of the screening machine.

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  • Combined Means For Separation Of Solids (AREA)
  • Table Devices Or Equipment (AREA)
  • Stringed Musical Instruments (AREA)
  • Pyridine Compounds (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

1. Screen bottom with screen elements (2) positioned side-by-side which are secured replaceably to a supporting sub-frame (2) by additional profiled members (6) made of synthetic material, in which the profiled members (6) grip two side edges of adjacent screen elements and have on their under surface projections (14) which are positively secured to the sub-frame, the screen elements (2) completely convering the upper surfaces of the profiled members (6), characterized in that the screen elements (2) with lower, offset regions (5) in their faces are secured to the profiled members (6) so that they engage positively.

Description

Die Erfindung betrifft einen Siebbelag mit nebeneinander angeordneten Siebelementen, die an einer tragenden Unterkonstruktion durch zusätzliche Kunststoffprofile auswechselbar befestigt sind, wobei die Profile zwei seitliche Ränder benachbarter Siebelemente halten und an ihrer Unterseite Vorsprünge aufweisen, die an der Unterkonstruktion rastend befestigt sind, wobei die Siebelemente die Profile an der Oberseite vollständig überdecken.The invention relates to a screen covering with screen elements arranged side by side, which are interchangeably fastened to a supporting substructure by additional plastic profiles, the profiles holding two lateral edges of adjacent screen elements and having projections on their underside which are latched to the substructure, the screen elements being Completely cover the profiles at the top.

Ein solcher Siebbelag ist aus der WO-A-8 402 290 bekannt. Diese bekannte Konstruktion führt zu einer grossen Bauhöhe des Siebbodens und lässt eine einfache Montage und Demontage nicht zu. Ferner ist es aus der deutschen Auslegeschrift 27 36 662 bekannt, die die Siebelemente haltenden Kunststoffprofile mit ihrer Oberseite in Höhe der Oberseite der Siebelemente anzuordnen, so dass die Profile dem Siebgut ausgesetzt sind und damit der Kunststoff der Profile nicht nur für den Halt der Siebelemente sorgen muss, sondern auch für einen geringen Verschleiss gewählt sein muss. Darüber hinaus erfordern diese Profile vorspringende Bewehrungsteile der Siebelemente, um die Siebelemente durch die Profile an der Unterkonstruktion befestigen zu können.Such a screen covering is known from WO-A-8 402 290. This known construction leads to a large height of the sieve bottom and does not allow easy assembly and disassembly. Furthermore, it is known from the German design specification 27 36 662 to arrange the plastic profiles holding the sieve elements with their upper side at the level of the upper side of the sieve elements, so that the profiles are exposed to the material to be sieved and thus the plastic of the profiles not only ensure the retention of the sieve elements must, but must also be selected for low wear. In addition, these profiles require protruding reinforcement parts of the sieve elements in order to be able to attach the sieve elements to the substructure through the profiles.

Ferner ist es aus der deutschen Offenlegungsschrift 24 37 809 bekannt, an der Unterseite von Siebelementen Vorsprünge anzuformen, die in Öffnungen der Unterkonstruktion einrasten. Das Anformen solcher Vorsprünge ist aufwendig, da sie über die Unterseite der Siebelemente hinausragen müssen und damit die Bauhöhe der Siebelemente vergrössern.Furthermore, it is known from German Offenlegungsschrift 24 37 809 to form projections on the underside of sieve elements, which snap into openings in the substructure. The shaping of such projections is complex since they have to protrude beyond the underside of the screen elements and thus increase the overall height of the screen elements.

Aufgabe der Erfindung ist es, einen Siebbelag der eingangs genannten Art derart zu verbessern, dass bei einem besonders sicheren Halt, einfacher Montage und Demontage und bei einer geringen Bauhöhe des Siebbodens das Zwischenelement - Profil - einem Verschleiss nicht ausgesetzt ist und die Siebelemente in der Herstellung einfach sind.The object of the invention is to improve a screen covering of the type mentioned in such a way that, with a particularly secure hold, simple assembly and disassembly and with a low overall height of the screen bottom, the intermediate element - profile - is not exposed to wear and the screen elements during manufacture are simple.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Siebelemente mit einem unteren, rückspringenden Bereich ihrer Stirnseiten an den Profilen formschlüssig rastend befestigt sind.According to the invention, this object is achieved in that the screen elements are fastened in a form-locking manner with a lower, recessed area of their end faces to the profiles.

Eine solche Konstruktion führt zu einem besonders sicheren Halt, zu einfacher Montage und Demontage und zu einer geringen Bauhöhe des Siebbodens. Allein die Siebelemente sind dem Siebgut ausgesetz. Die Siebelemente liegen schützend über den Profilen, die der Befestigung der Siebelemente an der Unterkonstruktion dienen. Das Material der Profile kann damit allein auf die Haltefunktion ausgerichtet sein, so dass ein Kompromiss zwischen einem Material für eine optimale Haltefunktion und einem optimal geringen Verschleiss nicht gesucht werden muss.Such a construction leads to a particularly secure hold, to simple assembly and disassembly and to a low overall height of the sieve plate. The screen elements alone are exposed to the screenings. The sieve elements are protective over the profiles that are used to attach the sieve elements to the substructure. The material of the profiles can thus be aligned solely with the holding function, so that a compromise between a material for an optimal holding function and optimally low wear need not be sought.

Zwischen zwei Siebelementen liegt stets nur ein einziges Zwischenelement ein, so dass die Anzahl der Profile gering sein kann. Im Bereich der Profile bilden diese mit den Stirnseiten der Siebelemente mehrere Vor- und Rücksprünge, so dass ein Vielfach-Labyrinth von hoher Dichtheit entsteht. Die Profile sind besonders einfach herstellbar, dass sie durch Strangguss oder segmentweisen Spritzguss geschaffen werden können.There is always only a single intermediate element between two screen elements, so that the number of profiles can be small. In the area of the profiles, these form several projections and recesses with the end faces of the screen elements, so that a multiple labyrinth of high density is created. The profiles are particularly easy to manufacture so that they can be created by continuous casting or segmental injection molding.

Profile und Siebelemente sind besonders leicht zu montieren, insbesondere da auf einen passgenauen Sitz in einzelne Öffnungen der Unterkonstruktion nicht geachtet werden muss. Auch die Demontage ist besonders einfach zu bewerkstelligen. Durch die grossen Anlageflächen von den Profilen an der Unterkonstruktion als auch an den Siebelementen wird ein Längsverschub der Siebelemente als auch der Profile sicher verhindert.Profiles and sieve elements are particularly easy to assemble, especially since there is no need to ensure that they fit perfectly into individual openings in the substructure. Disassembly is also particularly easy to do. The large contact surfaces of the profiles on the substructure and on the sieve elements reliably prevent longitudinal displacement of the sieve elements and the profiles.

Besonders vorteilhaft ist es, dass die Befestigungselemente keine Vorsprünge über der oberen Siebfläche bilden, da im Bereich der Profile die Oberseite der Siebelemente ohne Ausnehmungen und/oder Erhebungen stetig durchläuft.It is particularly advantageous that the fastening elements do not form any projections over the upper sieve surface, since in the area of the profiles the upper side of the sieve elements runs continuously without recesses and / or elevations.

Die Tatsache, dass die Siebelemente mit einem unteren, rückspringenden Bereich der Stirnseiten an den Profilen formschlüssig rastend befestigt sind, führt nicht nur zu einem besonders sicheren Halt und einfacher Montage und Demontage, sondern auch zu einer geringen Bauhöhe des Siebbodens. Hierzu wird auch vorgeschlagen, dass das Profil seitlich mindestens einen Vorsprung, insbesondere mindestens einen Zahn aufweist, der in einer entsprechend geformten Ausnehmung der Stirnseite der Siebelemente einliegt.The fact that the screen elements with a lower, recessed area of the end faces are positively fastened to the profiles not only leads to a particularly secure hold and simple assembly and disassembly, but also to a low overall height of the screen base. For this purpose, it is also proposed that the profile laterally have at least one projection, in particular at least one tooth, which lies in a correspondingly shaped recess on the end face of the screen elements.

Ferner können die Vorsprünge und Ausnehmungen derart geformt sein, dass in Zugrichtung des Siebelementes nach oben eine grössere Kraft auf das Profil übertragbar ist als in Druckrichtung nach unten. Hierdurch wird ein besonders sicherer Halt geschaffen, wobei sich Montage und Demontage als noch einfacher darstellen. Dabei können die Vorsprünge und Ausnehmungen sägezahnförmig sein, wobei die zur Waagerechten steileren Flanken der Vorsprünge des Profils der Siebelementenoberseite zugewandt sind. Auch wird vorgeschlagen, dass die Vorsprünge und Ausnehmungen über die gesamte Länge des Profils und zweier Seitenränder des Siebelementes laufen.Furthermore, the projections and recesses can be shaped such that a greater force can be transmitted to the profile in the pulling direction of the sieve element upwards than in the downward pressure direction. This creates a particularly secure hold, with assembly and disassembly being even easier. The projections and recesses can be sawtooth-shaped, the steeper flanks of the projections of the profile facing the upper side of the sieve elements. It is also proposed that the projections and recesses run over the entire length of the profile and two side edges of the screen element.

Besonders vorteilhaft ist es, wenn oberhalb des Profils die stirnseitigen Ränder zweier benachbarter Siebelemente dicht aneinanderliegen.It is particularly advantageous if the front edges of two adjacent screen elements lie close together above the profile.

Um die Unterkonstruktion vor einem Verschleiss durch das Siebgut zu schützen, als auch um ein Eindringen von Siebgut zwischen dem Profil und dem Siebelement als auch zwischen Profil und Unterkonstruktion zu verhindern, wird vorgeschlagen, dass in einem Zwischenraum zwischen der Unterseite der Siebelemente und der Oberseite der Unterkonstruktion am Profil zu beiden Seiten eine Leiste (Lippe) etwa waagerecht vorspringt, die die Oberseite der Unterkonstruktion überdeckt. Ferner kann hierzu das freie Ende der Leiste etwa L-förmig nach unten abgewinkelt sein und mit diesem Bereich den oberen Teil der Seitenwand des Profils der Unterkonstruktion schützend übergreifen, an dem das Kunststoffprofil Halt findet. Auch kann die Oberseite der Leiste am äusseren Rand eine nach oben vorstehende Lippe bilden, die unter Spannung der Leiste an der Unterseite des Siebelementes dichtend anliegt.In order to protect the substructure from wear by the screenings, as well as to prevent ingress of screenings between the profile and the screen element and between the profile and the substructure, it is proposed that in an intermediate space between the underside of the screen elements and the top of the Substructure on the profile projects a bar (lip) approximately horizontally on both sides, which covers the top of the substructure. Furthermore, the free end of the bar can be angled downward in an approximately L-shaped manner and, with this area, protectively overlap the upper part of the side wall of the profile of the substructure to which the plastic profile is held. The top of the bar can also protrude upwards on the outer edge Form a lip that rests tightly on the underside of the sieve element when the strip is under tension.

Eine alternative Befestigungsweise zwischen Siebelementen und Zwischenelementen wird dann erreicht, wenn die Profile an der Oberseite zwei Ausnehmungen, insbesondere zwei längs des Profils laufende Nuten aufweisen, und dass in die eine Ausnehmung bzw. Nut ein entsprechend geformter Vorsprung an der Unterseite eines Siebelementes und in die andere Ausnehmung bzw. Nut ein entsprechend geformter Vorsprung an der Unterseite des benachbarten Siebelementes einrastet. Hierbei kann die äussere senkrechte Seitenwand der Nut mit dem freien, nach unten abgewinkelten Ende der Leiste fluchten. Auch wird vorgeschlagen, dass das Profil an der Unterseite zwei längsgerichtete parallele Nuten aufweist, in die zwei freie Schenkel der Unterkonstruktion einrasten.An alternative method of fastening between screen elements and intermediate elements is achieved if the profiles have two recesses on the top, in particular two grooves running along the profile, and that a recess or groove has a correspondingly shaped projection on the underside of a screen element and into the other recess or groove, a correspondingly shaped projection engages on the underside of the adjacent screen element. Here, the outer vertical side wall of the groove can be aligned with the free, angled down end of the strip. It is also proposed that the profile has two longitudinal parallel grooves on the underside into which two free legs of the substructure engage.

Eine weitere Vereinfachung der Konstruktion und eine Verringerung der Einzelteile wird dadurch erreicht, dass das Profil von einem seitlich vorstehenden angeformten Bereich des benachbarten Siebelementes, insbesondere eines am Rand des Siebbelages befindlichen Siebelementes gebildet ist. Hierbei kann das Profil von einem seitlich vorstehenden angeformten Bereich eines seitlichen Randteiles des Siebbodens gebildet sein, so dass ein sicherer und dichter Randabschluss des Siebbodens erreicht wird.A further simplification of the construction and a reduction of the individual parts is achieved in that the profile is formed by a laterally protruding area of the adjacent sieve element, in particular a sieve element located at the edge of the sieve covering. Here, the profile can be formed from a laterally protruding area of a lateral edge part of the sieve plate, so that a secure and tight edge closure of the sieve plate is achieved.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen in senkrechten Schnitten dargestellt und werden im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 einen Schnitt durch einen Siebboden mit sägezahnförmiger Befestigungsweise;
  • Fig. 2 einen Ausschnitt aus Fig. 1 mit angeformten Lippen an seitlich vorstehenden Leisten der Zwischenelemente;
  • Fig. 3 statt einer Befestigung mit mehreren Zähnen ein Zwischenelement bzw. eine Leiste mit nur einem vorspringenden Zahn;
  • Fig. 4 ein Zwischenelement bzw. Leiste mit jeweils zwei oberen und unteren Nuten;
  • Fig. 5 eine Leiste, die an ein Zwischenelement angeformt ist; und
  • Fig. 6 eine Leiste, die an ein senkrechtes Seitenelement angeformt ist.
Embodiments of the invention are shown in the drawings in vertical sections and are described in more detail below. Show it:
  • 1 shows a section through a sieve plate with a sawtooth-shaped fastening method.
  • FIG. 2 shows a detail from FIG. 1 with molded lips on laterally projecting strips of the intermediate elements;
  • 3 shows an intermediate element or a strip with only one projecting tooth instead of a fastening with several teeth;
  • 4 shows an intermediate element or bar, each with two upper and lower grooves;
  • 5 shows a strip which is molded onto an intermediate element; and
  • Fig. 6 is a bar which is molded onto a vertical side element.

Ein Siebboden 1 ist aus einzelnen rechteckförmigen Siebelementen 2 zusammengesetzt, deren Länge mindestens doppelt so gross ist wie deren Breite. Die Siebelemente erstrecken sich zwischen den beiden senkrechten Seitenwänden 3 einer Siebmaschine und bestehen aus Kunststoff.A sieve tray 1 is composed of individual rectangular sieve elements 2, the length of which is at least twice as large as the width. The sieve elements extend between the two vertical side walls 3 of a sieving machine and consist of plastic.

An den Längsseiten der Siebelemente 2 liegen im oberen Bereich die Stirnseiten 4 zweier benachbarter Siebelemente dicht aneinander. Im darunter befindlichen Bereich springen die Stirnseiten 4 zurück um Ausnehmungen 5 zu bilden. Die rückspringenden Bereiche 5 zweier benachbarter Siebelemente 2 bilden unterhalb der aneinanderliegenden Stirnseiten 4 einen Raum, in dem der obere Bereich eines Kunststoffprofils 6 einliegt. Das Profil 6 erstreckt sich über die gesamte Länge der längeren Seiten der Siebelemente 2 und bildet im oberen Bereich Vorsprünge bzw. Zähne 7, die formschlüssig in entsprechend geformte Ausnehmungen 8 der rückspringenden Bereiche 5 einliegen.On the long sides of the screen elements 2, the end faces 4 of two adjacent screen elements lie close together in the upper region. In the area underneath, the end faces 4 jump back to form recesses 5. The recessed areas 5 of two adjacent screen elements 2 form a space below the abutting end faces 4 in which the upper area of a plastic profile 6 lies. The profile 6 extends over the entire length of the longer sides of the sieve elements 2 and forms projections or teeth 7 in the upper region, which engage in a form-fitting manner in correspondingly shaped recesses 8 in the recessed regions 5.

Um die Siebelemente 2 leicht befestigen zu können, aber sicherzustellen, dass sie sich nach oben hin nicht leicht lösen können, sind die zur Waagerechten steileren Flanken 9 der Zähne 7 nach oben hin gewandt. Der obere Bereich des Profils 6 entspricht in Abmessungen dem von dem Bereich 5 gebildeten Zwischenraum zwischen zwei benachbarten Siebelementen 2. Darunter bildet das Profil 6 zwei zu beiden Seiten vorspringende Leisten 10, die waagerecht angeordnet sind und mit ihrer Oberseite an der Unterseite 11 der Siebelemente 2 anliegen. Die längs verlaufenden Leisten 10 liegen mit ihrer Unterseite auf einem U-förmigen Stahlprofil12, dessen nach oben gewandte Schenkel nach innen abgebogen sind und die damit eine spaltförmige Öffnung 13 oben bilden, in die ein leistenförmiger Vorsprung 14 des Profils 6 rastend hineinreicht. Um einen rastenden Halt des Vorsprungs 14 zu ermöglichen, ist dieser in der eingesetzten Stellung in der Höhe der Öffnung 13 etwa von der Breite der Öffnung und darunter von grösserem Querschnitt.In order to be able to fasten the sieve elements 2 easily, but to ensure that they cannot be loosened easily upwards, the flanks 9 of the teeth 7, which are steeper to the horizontal, face upwards. The upper area of the profile 6 corresponds in size to the space formed by the area 5 between two adjacent screen elements 2. Below this, the profile 6 forms two strips 10 projecting on both sides, which are arranged horizontally and with their upper side on the underside 11 of the screen elements 2 issue. The longitudinal strips 10 lie with their underside on a U-shaped steel profile 12, the upwardly facing legs of which are bent inwards and thus form a gap-shaped opening 13 at the top, into which a strip-shaped projection 14 of the profile 6 extends. In order to allow the projection 14 to hold in place, in the inserted position at the height of the opening 13 it is approximately the width of the opening and below it has a larger cross section.

Das Profil 6 hat auf die Form der Oberseite 16 der Siebelemente 2 keinen Einfluss, so dass die Oberseite 16 eben sein kann. Die in den Siebelementen 2 befindlichen Öffnungen für das Siebgut sind nicht dargestellt.The profile 6 has no influence on the shape of the top 16 of the screen elements 2, so that the top 16 can be flat. The openings in the sieve elements 2 for the material to be sieved are not shown.

Die waagerechten Leisten 10 können an deren freien Enden nach unten hin rechtwinklig abgebogen sein und damit die Aussenseiten der U-Profile 12 teilweise umgreifen. Die Leisten 10 sind damit im Querschnitt L-förmig. In einer in Fig. 2 dargestellten alternativen Ausführung weisen die freien Enden der Leisten 10 nach oben gerichtete Lippen 17 auf, die sich längs des Profils 6 erstrecken und gegen die Unterseite der Siebelemente 2 drücken.The horizontal strips 10 can be bent downwards at right angles at their free ends and thus partially encompass the outer sides of the U-profiles 12. The strips 10 are thus L-shaped in cross section. In an alternative embodiment shown in FIG. 2, the free ends of the strips 10 have upwardly directed lips 17 which extend along the profile 6 and press against the underside of the sieve elements 2.

Das in Fig. 3 dargestellte Ausführungsbeispiel unterscheidet sich dadurch, dass der obere Bereich des Profils 6 nicht wie in Fig. 1 mehrere längs verlaufende waagerechte Zähne sondern nur einen einzigen zahnförmigen Vorsprung 7a jeweils zu beiden Seiten aufweist, der jeweils in einer entsprechenden Ausnehmung 8a an der Stirnseite des Siebelementes einliegt. Im Ausführungsbeispiel nach Fig. 4 weisen die Profile an der Oberseite zwei längs verlaufende Nuten 18 auf, in die leistenförmige Vorsprünge 19 hineinragen, die an den Unterseiten 11 der Siebelemente 2 angeformt sind. Ferner können an den Unterseiten 11 weiter aussen jeweils noch lippenförmige Profile vorstehen, die das Profil 6 aussen umgreifen. Der zwischen den beiden Nuten 18 verbliebene und nach oben hin vorstehende Bereich des Profils 6 liegt, wie schon der obere Bereich des Profils 6 im Ausführungsbeispiel nach Fig. 1, in rückspringenden Bereichen 5 der Stirnseiten der Siebelemente ein. Das Profil 6 nach Fig. 4 weist somit an Unterseite 2 längs gerichtete parallele Nuten 20 auf, in die die zwei freien Schenkel des U-Profils 12 hineinragen.The exemplary embodiment shown in FIG. 3 differs in that the upper region of the profile 6 does not have a plurality of longitudinally extending horizontal teeth as in FIG. 1, but only a single tooth-shaped projection 7a on each side, each of which is in a corresponding recess 8a the face of the screen element. In the exemplary embodiment according to FIG. 4, the profiles have two longitudinal grooves 18 on the upper side, into which strip-shaped projections 19 protrude, which are formed on the undersides 11 of the sieve elements 2. Furthermore, lip-shaped profiles can also protrude further on the undersides 11, which surround the profile 6 on the outside. The area of the profile 6 which remains between the two grooves 18 and which projects upwards lies, like the upper area of the profile 6 in the exemplary embodiment according to FIG. 1, in recessed areas 5 of the end faces of the screen elements. The profile 6 according to FIG. 4 thus has parallel parallel grooves 20 on the underside 2 into which the two free legs of the U-profile 12 protrude.

Entsprechend der in Fig. 5 dargestellten Ausführung kann das Profil 6 auch an der Längsseite eines Siebelementes angeformt sein, so dass nur an einer Seite des Profils sägezahnförmige Vorsprünge erforderlich sind. Diese Ausführungsform eignet sich auch besonders zur Befestigung von Siebelementen im Randbereich eines Siebbodens. Dies ist in Fig. 1 auf der linken Seite dargestellt. Der freie Rand des Siebelementes 2a ist hierbei zwischen einem unteren L-förmigen Profil 21 aus Stahl und einer oberen Kunststoffleiste 22 eingespannt. Statt dessen kann aber auch ein übliches Siebelement 2 am Rand des Siebbodens befestigt werden, wie dies auf der rechten Seite der Fig. 1 dargestellt ist. Hierzu wird ein halbes Profil 6 in einem halben Profil 12 rastend eingeschoben.According to the embodiment shown in FIG. 5, the profile 6 can also be formed on the long side of a sieve element, so that sawtooth-shaped projections are only required on one side of the profile. This embodiment is also particularly suitable for fastening sieve elements in the edge region of a sieve bottom. This is shown on the left in FIG. 1. The free edge of the screen element 2a is clamped between a lower L-shaped profile 21 made of steel and an upper plastic strip 22. Instead, however, a conventional sieve element 2 can also be attached to the edge of the sieve bottom, as is shown on the right-hand side of FIG. 1. For this purpose, half a profile 6 is pushed into a half profile 12 in a latching manner.

Eine weitere alternative Befestigungsweise der Siebelemente im Randbereich zeigt Fig. 6. Ein seitliches Kunststoffprofil 23 grösserer Höhe als Breite besitzt im unteren Bereich ein halbes angeformtes Profil 6, an dem ein übliches Siebelement 2 in derselben Weise eingerastet gehalten ist, wie dies in Fig. 1 auf der rechten Seite dargestellt ist. Hierdurch wird die Zahl der zu montierenden Teile verringert und die Seitenwand der Siebmaschine sicher geschützt.A further alternative method of fastening the sieve elements in the edge region is shown in FIG. 6. A side plastic profile 23 of greater height than width has in the lower region a half-molded profile 6 on which a conventional sieve element 2 is held in the same manner as in FIG. 1 is shown on the right. This reduces the number of parts to be assembled and reliably protects the side wall of the screening machine.

Claims (15)

1. Screen bottom with screen elements (2) positioned side-by-side which are secured replaceably to a supporting sub-frame (2) by additional profiled members (6) made of synthetic material, in which the profiled members (6) grip two side edges of adjacent screen elements and have on their under surfaces projections (14) which are positively secured to the sub-frame, the screen elements (2) completely covering the upper surfaces of the profiled members (6), characterized in that the screen elements (2) with lower, offset regions (5) in their faces are secured to the profiled members (6) so that they engage positively.
2. Screen bottom according to Claim 1, characterized in that the upper surface (16) of the screen element (2) in the region of the profiled member (6) is uninterrupted, without recesses and/or protuberances.
3. Screen bottom according to Claims 1 or 2, characterized in that the profiled member (6) has laterally at least one projection (7), in particular at least one tooth, which is located in a correspondingly shaped recess (8) in the face of the screen element (2).
4. Screen bottom according to Claim 3, characterized in that the projections (7) and recesses (8) are shaped in such a way that a larger force can be transmitted to the profiled member (6) in the upward direction of pull of the screen element (2) than in the downward pressure direction.
5. Screen bottom according to Claim 4, characterized in that the projections (7) and recesses (8) are saw-tooth-shaped and the sides (9) of the projections (7) of the profiled member (6) which are more steeply inclined to the horizontal face towards the upper surface (16) of the screen element.
6. Screen bottom according to one of Claims 3 to 5, characterized in that the projections (7) and recesses (8) run along the entire length of the profiled member (6) and the two side edges of the screen element (2).
7. Screen bottom according to one of the preceding Claims, characterized in that the facing edges of two adjacent screen elements (2) are seated tightly against one another above the profiled member (6).
8. Screen bottom according to one of the preceding Claims, characterized in that in an interstitial space between the under surface (11) of the screen element (2) and the upper surface of the subframe (12), a strip (lip) (10) projects approximately horizontally on both sides at the profiled member (6) and covers the upper surface of the sub-frame (12).
9. Screen bottom according to Claim 8, characterized in that the free end of the strip (10) are bent down approximately in an L-shape and with this portion can enclose and protect the upper part of the side wall of the profiled member (12) of the sub-frame on which the profiled member (6) made of synthetic material grips.
10. Screen bottom according to Claims 8 or 8, characterized in that the upper surface of the strip (10) forms an upward projecting lip (17) at its outer edge which, when the strip (10) is under pressure, is seated against the under surface (11 ) of the screen element (2) so that it forms a seal.
11. Screen bottom according to one of the preceding Claims, characterized in that the profiled members (6) have two recesses (18) on their upper surfaces, in particular two slots running along the length of the profiled member, and in that an appropriately shaped projection (19) on the under surface of one screen element (2) engages in one recess (18) or slot and an appropriately shaped projection (19) on the underside of the adjacent screen element (2) engages in the other recess (18) or slot.
12. Screen bottom according Claims 11, characterized in that the outer vertical side (24) of the slot (18) can be aligned with the free end of the strip (10) which is bent downward.
13. Screen bottom according to one of Claims 9 to 12, characterized in that the profiled member (6) has in its under surface two lengthwise, parallel slots (20) which engage the two free arms of the sub-frame (12).
14. Screen bottom according to one of the preceding Claims, characterized in that the profiled member (6) is formed from a laterally projecting, formed, region of the adjacent screen element (2a), in particular a screen element (2a) at the edge of the screen bottom.
15. Screen bottom according to one of the preceding Claims, characterized in that the profiled member (6) is formed from a laterally projecting, formed, region of a side edge part (23) of the screen tray (1 ).
EP85108325A 1984-07-11 1985-07-05 Screen bottom Expired - Lifetime EP0167999B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108325T ATE37149T1 (en) 1984-07-11 1985-07-05 SCREEN COVERING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843425485 DE3425485A1 (en) 1984-07-11 1984-07-11 SCREENING
DE3425485 1984-07-11

Publications (4)

Publication Number Publication Date
EP0167999A2 EP0167999A2 (en) 1986-01-15
EP0167999A3 EP0167999A3 (en) 1986-06-25
EP0167999B1 true EP0167999B1 (en) 1988-09-14
EP0167999B2 EP0167999B2 (en) 1991-12-18

Family

ID=6240336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108325A Expired - Lifetime EP0167999B2 (en) 1984-07-11 1985-07-05 Screen bottom

Country Status (9)

Country Link
EP (1) EP0167999B2 (en)
JP (1) JPH0317976Y2 (en)
AT (1) ATE37149T1 (en)
AU (1) AU586172B2 (en)
DE (2) DE3425485A1 (en)
DK (1) DK314585A (en)
ES (1) ES287996Y (en)
NO (1) NO163517C (en)
ZA (1) ZA855136B (en)

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Also Published As

Publication number Publication date
ES287996U (en) 1986-01-01
ZA855136B (en) 1986-07-30
AU4481085A (en) 1986-01-16
AU586172B2 (en) 1989-07-06
DE3425485C2 (en) 1991-01-10
JPH0317976Y2 (en) 1991-04-16
DE3425485A1 (en) 1986-01-16
JPS6191376U (en) 1986-06-13
EP0167999A2 (en) 1986-01-15
DE3564912D1 (en) 1988-10-20
NO163517C (en) 1990-06-13
DK314585A (en) 1986-01-12
ES287996Y (en) 1986-08-01
EP0167999B2 (en) 1991-12-18
NO852768L (en) 1986-01-13
EP0167999A3 (en) 1986-06-25
DK314585D0 (en) 1985-07-10
NO163517B (en) 1990-03-05
ATE37149T1 (en) 1988-09-15

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