EP0937507B1 - Side rail for screens - Google Patents

Abstract

The bar (1) is located on one side of a sieve plate with sieve mats (2) and a machine side wall on the other side. The bar is clamped positively between the outer end face (14) of a sieve mat and the side wall. The mat end face and bar are positively connected especially via a tongue and groove, e.g. a horizontal groove (4) in the bar and a tongue (5) on the sieve mat side. A projecting deflector (7) is located on the side bar, which projects over the top of the sieve mat edge. The side bar comprises an elastomer material.

Description

The invention relates to a screening machine with plastic side strips as lateral termination of the screen area, the screen area being limited and the Connection between the screen mats and the side bar is detachable.

Sidebars serve as wear protection for screening machines Screen machine side walls, partly for fastening the screen coverings and further for sealing the screen surfaces. They are made of steel, wood or elastomer Fabrics (rubber / plastic) that are usually made of steel reinforcements which contain rigidity and fastening. It is fastened with wedges, Screw or plug.

The disadvantages of such fastenings are that when wedging the side rails Elastomers must be reinforced against deformation, wedges for fastening are necessary and abutments on the side walls of the screening machine Recording the wedges are needed. When fastened with screws the side strips made of elastomers must be reinforced against deformation. It are screws for mounting, mounting holes in the Screen side walls and mounting holes in the side rails necessary. The mounting holes in the sidebars must be for mounting the screw heads must be lowered, otherwise they are premature Exposed to wear. When replacing the screws are mostly stiff and rusted. When attaching by plugging special profiles to accommodate the side rails parallel to the Screen machine wall necessary.

From DE 79 18 167 U1 a wire screen is known, the edge of which is in a Screening device through a side bar in the form of an elastic profile is held. To create a secure hold between the screen edge and the profile, clamps, gluing or welding are proposed, so that there is an inseparable connection.

A sieve bottom made of plastic sieve elements is known from EP 167 999, at between the plastic screen elements and the machine side wall Sidebars made of plastic are lying in a U-shape with lower projections Steel profile are held to the side rails one to give sufficient support.

The object of the invention is to provide a side bar of the type mentioned improve that with simple construction and assembly and without additional fasteners provides a secure detachable hold.

This object is achieved in that the side bar non-positively between the outer face of the screen mat and the Side wall is clamped, and between the side bar and the There is a positive connection at the front of the screen mat, in which the Sidebar has a horizontal groove into which one on the front of the Screen mat arranged projection, in particular a spring engages.

The sidebar according to the invention is safe without additional fasteners between the side wall of the machine and the screen mats clamped and positively held. Assembly and disassembly are particularly easy and in the shortest possible time perform. The side clamping strips are preferred for screening systems (Change systems), especially in systems that are not selective, but have a linear attachment used - preferably in the so-called Transverse installation, where the system carriers and the screen mats crosswise to the conveyor be installed in a screening machine.

It is advantageous here if the side strips face the one facing the screen field Side has a protruding deflector that the edge of the screen mat on the Overhanging the top.

This also improves the hold and back pressure is ensured, if projections on the back, especially in the form of knobs as Project counter bearing. It is also an advantage if between the projections Free space for the discharge of liquids, especially a suspension are.

The weight of the sidebar is reduced by the fact that the sieve panel has cutouts facing away from the rear of the side bar. For the Press fit is suggested that the screen mats are longer than the clear Dimension between the sidebars.

It is advantageous if the screen mats through an adapter profile to under Siebfeld arranged cross members are held. This is a relief reached when the adapter profile reaches under the side bar.

It is particularly advantageous if the sidebar stabilizes the back Ribs. It is preferably proposed that the sidebar be made of an elastomer.

Fig. 1

Siebmatten, Seitenklemmleiste und Adapterprofil im auseinander genommenen Zustand,

Fig. 2

Siebmaschine mit Teilen nach Fig. 1 im senkrechten Schnitt,

Fig. 3

eine Ansicht nach Pfeil A in Fig. 1,

Fig. 4

eine Draufsicht auf die Siebmaschine und den Siebbelag von oben, und

Fig. 5

einen Schnitt nach B-B in Fig. 4.

An embodiment of the invention is shown in the drawings and will be described in more detail below. Show it

Fig. 1

Screen mats, side clamping strip and adapter profile in the disassembled state,

Fig. 2

Screening machine with parts according to FIG. 1 in vertical section,

Fig. 3

2 shows a view according to arrow A in FIG. 1,

Fig. 4

a plan view of the screening machine and the screening surface from above, and

Fig. 5

a section along BB in Fig. 4th

The screening machine has a screening field made up of individual screening mats 2 Elastomers preferably made of plastic, which are known side by side Fastening strips (adapter strips) 3 are attached to cross members 11, the extend between the two machine side walls 12. To the Sidewalls are inside sides (clamp) that are between the Pressed side walls and the outer end faces 14 of the screen mats 2 become. They are held there because the length of the screen mats is a bit is chosen larger than the clear dimension between the two side strips.

Protrusions 6 as a counter bearing on the back of the sidebar secure the corresponding back pressure. They are preferably designed as knobs 6. Between the counter-layers or knobs 6 there are free spaces 15 for the derivation of Liquids, especially a suspension, in the cavities has penetrated.

The sieve mats have on the end face 14 towards the sieve machine side wall 12 a spring 5 worked into the groove 4 of the side terminal block 1 intervenes and is thus securely fixed.

In order to prevent overloading of the connection between the carrier 11 and the adapter profile 3, an underlap 13 of the adapter profile is provided.

By incorporating cavities 9 and 15, the dead weight of the Side terminal block 1 minimized.

To simplify disassembly of the screen mat, it makes sense to split it into two parts 2a, 2b perform. To achieve a better sieve effect and an offset of the To achieve front-side screen joints 14, the screen mat lengths are alternating chosen differently.

The sidebar is made so that it is in the relaxed state in the upper Area of the machine wall (12) and in the lower area (counter bearing) protrudes from the machine side wall by a certain distance. At the Assemble the screen mat (2) by pressing the side bar Vertical sieve mat deformed until the counter bearing (6) on the Fitting the machine side wall. This creates a contact pressure of the upper one Area of the sidebar against the machine side wall and a Sealing achieved.

Claims (11)

1. Screen having plastics side rails (1) to act as a lateral closure for the screening field, the screening field (12) incorporating screening mats (2) and being delimited by a side wall of the screen, and the connection between the screening mats and the side rail being removable, characterised in that the side rail (1) is wedged non-positively between the external front face (14) of the screening mat (2) and the side wall (12), and between the side rail (1) and the screening mat's front face (14) there is an interlocking connection wherein the side rail (1) incorporates a horizontal slot (4) into which engages a projection on the front face (14) of the screening mat, more particularly a spring (5).
2. Screen according to claim 1, characterised in that on the side that is nearest to the screening field the side rail (1) incorporates a projecting deflector (7) which juts out over the top edge of the screening mat.
3. Screen according to either of the previous claims, characterised in that protruding from the rear of the side rail (1) are projections, more particularly in the form of burls (6), acting as back-rests which bear against the screen's side walls (12).
4. Screen according to claim 3, characterised in that between the projections (6) there are gaps (15) for carrying away liquids, more particularly a suspension.
5. Screen according to any of the preceding claims, characterised in that the reverse of the side rail (1) that is furthest from the screening field incorporates recesses.
6. Screen according to any of the preceding claims, characterised in that for a press-fit the screening mats (2) are longer than the clearance between the side rails.
7. Screen according to any of the preceding claims, characterised in that an adapter section (3) holds the screening mats (2) on cross-members (11) arranged beneath the screening field.
8. Screen according to claim 7, characterised in that the adapter profile (3) engages the underside of the side rail (1).
9. Screen according to any of the preceding claims, characterised in that it (1) incorporates ribs (8) which stabilise it at the back.
10. Screen according to any of the preceding claims, characterised in that the side rail (1) is made from an elastomer.
11. Screen according to any of the preceding claims, characterised in that the side rail has been manufactured in such a way that in the unstressed state its top portion is up against the screen wall (12) and its bottom portion (back-rest) juts out a certain way from the screen's side wall.

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