EP1946851B1 - Reciprocating screen machine - Google Patents

Abstract

The machine (1) has a housing (2), and screen decks (5-7) mounted on two sidewalls (3, 4). A screen lining (8) is retained on the screen decks, and a drive unit causes the screen decks to vibrate, where a bulk material is fed via a material feed. A fine-grain bulk material and a coarse-grain bulk material are respectively discharged via a fine-grain discharge and a coarse-grain discharge. Mounting points are provided on the sidewalls for mounting the screen decks and aligned with a defined grid.

Description

The present invention relates to a vibrating screening machine which is particularly suitable for classifying bulk materials, in particular solid materials such as e.g. Stones, and the like is suitable, and which has a housing with two side walls, to which at least one screen deck is attached.

In the prior art, such Schwingsieb- or Vibrationssiebmaschinen have become known, for example, are suitable for classification, for pre-separation, for deflagration, drainage and / or eg for Fremdkörperabsiebung. When classifying, there is generally a separation of the feed stream into two or more equivalent products, which are separated according to grain size. In the pre-separation, the goal is to separate material that is to be removed from the further processing process, with a screening machine. A typical example of this is the cup relief before the primary crusher in the quarry. Stones whose grain size falls below a predetermined level, should be passed to the primary crusher to relieve the crusher. Deflagration is the classifying process in which interfering fine particles are separated or emaciated from a product. Screening machines for foreign matter screening are used to sift out sporadically occurring foreign substances in the feed material.

All these vibrating screens are designed and built according to the application and requirements.

Vibrating screens for pre-separation of different power generally have the same working principle, but are dimensioned differently. The disadvantage is that each Schwingsiebmaschine practically represents a redesign, even if the same vibration principles are used and the machine is provided for the same Einsatzweg. Documents GB-A-2 182 866 . EP-A-1 719 560 and US-A-4,732,670 show for example some vibrating screens.

It is therefore the object of the present invention to provide a vibrating screening machine, the construction and construction of which allows better scalability, so that different screening machine sizes are easier to produce than the known prior art. One aspect of the object of preferred developments is to provide a vibrating screening machine which has a stiffer construction.

This object is achieved with a device having the features of claim 1. Preferred developments and refinements of the invention are the subject of the dependent claims.

The screening machine according to the invention is designed as a vibrating screen and is used for screening and in particular for classifying bulk materials, in particular solid materials and the like. The vibrating screening machine according to the invention has a housing and at least two side walls, on which at least one screening deck is fastened, on which a screen lining is held. At least one drive means is provided to vibrate the screen deck and assist in the screening process. At the vibrating screening machine according to the invention, at least one material feed is to be screened Provided bulk material and it is at least one fine grain removal for sieved fine-grained bulk material and at least one coarse grain removal provided for coarse-grained bulk material. The provided on the side walls attachment points for attaching at least one screen deck are aligned on a fixed grid.

The invention has many advantages. A significant advantage is the arrangement of the attachment points on a fixed grid, so that a simple scalability of the machine is achieved. If a larger screen deck is provided, further attachment points are determined on the side wall on the basis of the given grid, at which the screen deck is connected to the side wall. Optionally, the side wall is e.g. extended.

The invention allows a modular construction of such vibrating screening machines, since it is possible to construct differently sized vibrating screening machines with the same components. The fixed grid enables each attachment to be attached to all systems, regardless of the size of the system.

In the vibrating screening machine according to the invention, in particular, the drive brings not only the screening deck or the screen lining into vibration, but also the housing as a whole and thus all the intended swinging decks.

The fine-grained material can be sieved one or more times, while the coarse-grained material can be completely unsized or only slightly sieved.

In a preferred development of the invention, the vibrating screening machine according to the invention has two or more screening decks on, whose attachment points are aligned on the side walls at the predetermined grid. By this development, a particularly modular design is achieved.

In an advantageous development, the grid has grid points which are each aligned along an x-y coordinate system. The course of the axes of the x-coordinate and the course of the y-coordinate preferably include a system angle, which may also be different from 90 degrees. For linear vibrating machines, the system angle is 90 ° in particular. In particular, in other types of vibrating machines, the angle may be greater than 90 degrees, but is preferably less than 90 degrees, especially in a range between 45 and about 90 degrees, preferably in the range between about 60 and 80 degrees.

Preferably, in a proper construction, the screen deck is arranged at a screen tilt angle with respect to the horizontal in order to ensure further transport of the material to be screened during screening. Preferably, the screen tilt angle is between about 0 and 45 degrees, and more preferably between about 5 and 30 degrees. The screen tilt angle depends on the bulk material to be sifted off and its nature, as well as other factors such as e.g. the system performance, etc.

In the intended design, the y-coordinate is preferably oriented substantially perpendicular to a horizontal axis, so that the angle between the x-coordinate and the horizontal is equal to the screen tilt angle.

In preferred embodiments, the grid spacing of the grid in the x-coordinate direction may be different from the grid spacing in the y-coordinate direction. The ratio of the grid spacing in x-direction and y-direction can be integer or half-integer, but can also be completely independent of each other.

Basically, the distance between the individual grid points is arbitrary, but a reasonable handling of the grid should be given.

Preference is therefore given grid spacing in the x-direction or in the y-direction, which are between about 25.4 mm and 508 mm. In the y-direction, a grid spacing of about 50 mm to 150 mm is preferred and may be, for example, 100 mm. In the x-direction, the grid spacing can be greater and is preferably about 50 mm to 320 mm and can be, for example, 150 mm or 300 mm.

In all embodiments, the cross struts of the screen deck are preferably flanged to the side walls with flanges, wherein the attachment points are arranged on the side wall on the grid. The flanges are bolted for attachment to holes in the sidewall, e.g. are bored.

Screening machines are exposed to high loads, so that even formed by strong metal plates side walls can tear. Therefore, in the art in the field of drive or in the field of attachment points of the individual screen decks reinforcing plates were screwed or welded onto the side walls. These reinforcing plates, which are made of solid material, considerably increase the weight of such a screening machine and, despite the locally doubled weight, contribute only moderately to the stiffening of the side walls.

Compared to this prior art, it is an object to provide a screening machine, which is a clear has higher rigidity with only a relatively small amount of material.

This object is achieved by a Schwingsiebmaschine having a housing and at least two side walls and at least one screen deck attached thereto, on which a screen lining is held. Furthermore, the vibrating screen comprises drive means to vibrate the screen deck. To reinforce the side walls of such Schwingsiebmaschine at least one reinforcing unit is arranged on the side wall, which is connected to the side wall and in particular forms a closed hollow body.

For such a vibrating screening machine, the applicant reserves the right to claim separate protection.

In all embodiments and developments of vibrating screening machines described above, it is preferable to use such a reinforcing unit. Preferably, the reinforcement unit forms with the sidewall a hollow profile, e.g. in the form of a hollow box, which may in principle be arbitrarily shaped, but in particular approximately triangular, four-sided or pentagonal and particularly preferably approximately quadrangular.

In preferred developments, the reinforcing unit consists of a bent metal sheet, which forms three sides of the hollow profile, wherein the side wall leading surfaces on the side wall are outwardly bent and form there fitting on the side wall mounting webs, where the reinforcing plate attached to the side wall and in particular screwed.

Advantageously, at least some of the fastening points for fastening the reinforcing unit also serve for fastening the transverse struts.

Preferably, as fastening means for fastening the reinforcing unit to the side wall rivets or screws are used, wherein the attachment points are aligned in particular on the grid.

Preferably, vertical reinforcement units are provided on the side wall, which are aligned in a normal design of the vibrating screen substantially parallel to the y-coordinate and which may be substantially perpendicular to the horizontal.

Advantageously, longitudinal reinforcement units are provided, which are aligned in particular substantially parallel to the x-coordinate and are preferably arranged on the side wall.

Both the vertical reinforcement units and the longitudinal reinforcement units preferably have a hollow box shape, preferably of the same cross-section, so that these reinforcement panels for the reinforcement unit are modular and can be cut to size depending on the required length.

The reinforcement units serve as integrated vibration stiffening, which can significantly increase the life of the screening machine according to the invention.

In particularly advantageous developments of the vibrating screen at least two reinforcing units and at least two cross struts a frame, which contributes to the reinforcement of the housing. In each case, two reinforcing units and in each case a few transverse struts each form a frame. Such frames contribute significantly to the vibration of the Schwingsiebmaschine and therefore can also be referred to as a reinforcing frame.

Preferably, at least one frame or at least one transverse reinforcement frame is provided, which is formed by two vertical reinforcement units and some of the transverse struts.

In a further preferred development, at least one frame or at least one horizontal reinforcement frame is provided, which is formed by at least two longitudinal reinforcement units and some of the transverse struts.

Particularly preferably, at least one frame or at least one side frame is provided, which is formed by at least two vertical reinforcement units and by at least two longitudinal reinforcement units. In particular, some vertical reinforcement units and some longitudinal reinforcement units may also form a side frame. The side panel can be integrated in the side frames.

All previously described frame or reinforcing frame contribute with relatively little use of material in an advantageous manner to the vibration of the machine.

By one or more horizontal reinforcing frame, transverse reinforcement frame and side frame is a very significant three-dimensional vibration stiffening with low material usage which increases the life of the machine while reducing downtime.

The vibrating screening machine according to the invention is preferably designed as a circular vibrating screening machine, but can also be designed as an eccentric vibrating screen or linear vibrating screening machine.

Possible fields of application are gravel and grit classification as well as gravel and sand classification or the classification of fertilizers, rubble or limestone or other materials.

By the defined layout or grid, a systematic construction of the machines can be achieved with different assemblies, with a fixed grid for both the metric and for Anglo-Saxon measuring system is possible, so that can be constructed with a grid for both Maßsysteme.

In the x direction, the grid spacing can be adapted to common sizes of screen coverings.

The grid comprises halftone dots in the horizontal and vertical directions, each with a predetermined spacing in the x direction and in the y direction, with a predetermined offset being present for adaptation to the screen pitch. By the grid dimension defined Siebdeckabstände for the given storage groups are achieved. In order to adapt to different measuring systems, slots can be provided in each case, for example, allow the distance of 100 mm and the distance of four inches (101.6 mm).

By the horizontally and vertically provided folded sheet metal profiles which are screwed onto the side walls and give the reinforcing units, from the open sheet metal profiles closed reinforcement units, which result in a particularly stable frame construction of the screening machine according to the invention. It is achieved a high stiffness at a low weight.

The formation of reinforcement frame from the reinforcement units and the cross braces a particularly stable vibration structure is achieved.

There is a simple adaptation of other modules such. the storage, the spring brackets, the cross braces or trusses given by the grid or hole pattern. Furthermore, there is optimal accessibility to the clamping screws.

Further advantages and possible applications emerge from the exemplary embodiment which will be described below with reference to the enclosed figures:

Fig. 1

eine schematische perspektivische Ansicht einer erfindungsgemäßen Schwingmaschine;

Fig. 2

eine schematische Ansicht einer Seitenwand der Schwingsiebmaschine nach Fig. 1;

Fig. 3

eine schematische Seitenansicht der Seitenwand mit eingeblendetem Raster;

Fig. 4

eine teilweise geschnittene Seitenansicht der Schwingsiebmaschine nach Fig. 1;

Fig. 5

eine perspektivische Unteransicht eines Siebdecks bei weggelassener Seitenwand;

Fig. 6

eine Seitenansicht eines Befestigungsankers für die Längsstreben für eine Schwingsiebmaschine nach Fig. 1;

Fig. 7

einen stark schematischen vertikalen Querschnitt durch eine Querstrebe;

Fig. 8

einen weiteren schematischen Querschnitt durch eine Querstrebe mit sichtbarer Verstärkungseinheit;

Fig. 9

eine schematische perspektivische Aufsicht auf einen Teil der Maschine mit einer Querstrebe; und

Fig. 10

einen schematischen horizontalen Querschnitt durch eine Querstrebe.

Show:

Fig. 1

a schematic perspective view of a vibrating machine according to the invention;

Fig. 2

a schematic view of a side wall of the vibrating screen after Fig. 1 ;

Fig. 3

a schematic side view of the side wall with faded in grid;

Fig. 4

a partially sectioned side view of Schwingsiebmaschine after Fig. 1 ;

Fig. 5

a perspective bottom view of a screen deck with the side wall omitted;

Fig. 6

a side view of a fastening anchor for the longitudinal struts for a vibrating screen after Fig. 1 ;

Fig. 7

a highly schematic vertical cross section through a cross member;

Fig. 8

a further schematic cross section through a transverse strut with visible reinforcement unit;

Fig. 9

a schematic perspective view of a part of the machine with a cross strut; and

Fig. 10

a schematic horizontal cross section through a transverse strut.

With reference to the Fig. 1-10 Now, an embodiment of the present invention will be explained. In Fig. 1 an overall view of a screening machine 1 according to the invention is shown, which is designed as Schwingsiebmaschine.

The screening machine 1 is here in the embodiment, in particular for classifying bulk material such. Gravel, grit, gravel, sand, building rubble or limestone used, but can also be intended for screening or classification of other bulk materials or serve.

The screening machine 1 has a housing 2 with side walls 3 and 4, between which in this example three screening decks 5, 6 and 7 are arranged. The screen covering 8 of a screen deck can be used as a tensioned wire mesh or as a perforated plate with, for example, downwards conically enlarging holes or in particular as Rubber or plastic covering be executed, are provided in accordance with the classification specification corresponding holes.

At the in perspective view Fig. 1 Rear end of the screening machine 1, a material supply 10 is provided at which the bulk material to be classified is supplied to the screening machine. The classified bulk material passes depending on the fine grain on the screen decks 6 or 7 or falls all the way down or remains on the screen deck 5 until it is on the respective Feinkornabfuhr 12 or 13 or the coarse grain 11 is derived.

The sifting machine 1 is designed here as a circular free-standing sifter and has a drive 19 and four resilient support systems 47, on which the screening machine 1 is mounted relative to the ground.

On the side walls 3 and 4 horizontal and vertical reinforcing units 29 and 28 are provided, which are designed as bent sheet metal profiles.

The reinforcing units 28, 29, which are approximately rectangular in cross-section, are formed on three sides by the bent metal sheets and on one side by the side walls 3, 4 of the screening machine 1 and considerably increase the rigidity of the side walls, so that a complicated doubling of the side walls is loaded Areas can be omitted, which reduces the total weight of the screening machine and the cost of materials and still increases the reinforcing effect.

The reinforcing units 28, 29, together with the transverse struts and the side walls, form reinforcing frames, of which only some reinforcing frames 61 to 64 are shown in FIG Fig. 1 are shown by thick dotted lines.

The reinforcing frame 61 is formed by two vertical reinforcing units 28 and by the three horizontal transverse struts 23, which at this longitudinal position the three screening decks 5, 6 and 7 hold. The vertical reinforcing frame 61 and the other vertical reinforcing frames in the other vertical reinforcing units 28 result in a particularly vibration-resistant construction of the screening machine 1.

Longitudinal reinforcing frames 62 and 63 are formed by the horizontal and longitudinal reinforcing units 29 and the transverse strut 23 associated with the respective screening deck 5 and 7, respectively. Further longitudinal reinforcement frames are formed by the further longitudinal reinforcement units 29 and the associated transverse strut 23, so that a high rigidity is achieved in this plane as well.

In the third dimension, lateral reinforcing frames are formed, of which the lateral reinforcing frame 64 is shown by way of example with a thick dotted line.

The existing in all three dimensions reinforcing frame 61 to 64 lead to a tremendous increase in the vibration stiffness of the screening machine 1, the weight increases only moderately.

This also contributes to the fact that individual screw fastened at the same time the cross strut on the side wall and also a reinforcing unit on the side wall, so that an optimal connection is achieved.

In the intended construction, the screening machine has a screen inclination angle 18, which in the exemplary embodiment is between about 10 and 30 degrees.

All fastening points 14 on the side wall 3 and the side wall 4 are aligned along a grid 15, which has grid points 16.

The grid points are aligned along an xy-coordinate system, wherein the x-coordinate x is aligned here parallel to the lower or upper edge of the side wall 3 and 4 respectively. The grid spacing 21 between two grid points in the x-direction can be equal to the grid spacing 22 in the y-direction, but can also be independent of the grid spacing 22 in the x-direction.

The y-coordinate has to the x-coordinate system angle 17, which is here in the embodiment between about 60 and 80 degrees. Thus, there is no right-angled x, y coordinate system, but the angle is different between about 10 and 30 degrees of 90 degrees.

Here in the exemplary embodiment, all fastening points 14 are selected based on the grid points 16, it being noted that the grid points 16 may also be virtual points, so that not everyone in Fig. 3 shown grid point 16 must be visible on the side wall 3 or 4 of the screening machine.

In the screening machine 1, all attachment points 14 for attachment of the transverse struts 23 on the side walls 3, 4 are aligned with the grid, so that the axial distance of individual attachment points on a transverse strut 23 is equal to the multiple of the grid spacing.

Likewise, the distance in the x or y direction of an attachment point 14 of a transverse strut 23 to an attachment point 14 of another cross member 23 is equal to the multiple of the grid spacing, so that a modular and systematic design of the machine results, which allows a simple adaptation of other modules , because regardless of the size of the machine, the most diverse assemblies can be grown.

In Fig. 5 is a perspective bottom view of two transverse struts 23 at weggeschnittener side wall 3 is shown. The transverse struts 23 are fastened to the side wall 3 via flanges 32. At the transverse struts 23 25 fastening anchors 9 are provided in a respective lateral distance in order to connect the longitudinal struts 31 with the transverse struts 23 firmly, but releasably.

Due to the screwed connection between the longitudinal struts 31 and the cross braces 23 welding stresses are avoided, so that with a constant wall thickness of the cross braces 23 a higher reliability and durability can be achieved.

The attachment of a fastening anchor 9 to a cross member 23 is in Fig. 6 shown enlarged on average. Against the underside 23 a of the transverse strut 23, the counter-plate 37 is pressed by means of the clamping force of the screws 38. The screws 38 bear with their screw heads 39 on the underside of the counter-plate 37, while their threads extend upward, where they are performed through holes in the holding plate 34 and secured on top with nuts 46. Protective elements may be provided to protect the threaded ends and nuts 46 from damage due to falling classified material.

Attachment profiles 53 can be attached to the screws 38 in order to arrange wear protection elements thereon.

Between the connecting means designed as a fastening screw 38 and the lower edge of the holding plate 34, a clamping piece 40 is provided with clamping parts 41 and 42, which are each wedge-shaped, wherein the inclined surfaces slide on each other. Here in the exemplary embodiment, the clamping part 42 is formed integrally with the holding plate 34.

The fastening screw 38 extends through an axial hole in the clamping piece 40, so that when tightening the screw 38, the clamping member 41 moves axially in the direction of the holding plate 34, whereby the fastening part 41 is pressed against a side surface 23 b of the cross member 23. As a result, a double pressure is achieved, namely, on the one hand, the counter-plate 37 is pressed against the underside 23a of the cross member 23 and on the other hand, the clamping member 41 is pressed against the clamping part 42 of the holding plate 34 and against the side surface 23b of the cross member 23, so that a particularly reliable fit of the mounting anchor 9 at the cross strut 23 is achieved. In addition, a corresponding clamping piece 40 may also be provided on the other side of the transverse strut 23 in order to exert pressure on the transverse strut 23 also from the other side.

The respective flange 32 fixed to the two ends of the transverse strut 23 has holes 23 through which screws are passed to connect the flange 32 to one of the side walls 3, 4.

The longitudinal struts 31 are connected by screws 44 and 45 with the holding plate 34. Each longitudinal strut 31 is here designed as a C-profile and extends in the longitudinal direction in each case from one transverse strut 23 to the next cross strut 23. A significant advantage of the screening machine 1 is that each longitudinal strut at each end 31a via two screw 44, 46 and 45, respectively 46 is connected to a fastening anchor 9 or to a transverse strut 23. This allows a transmission of bending moments from one longitudinal strut 31 to the next longitudinal strut 31, as well as on the transverse struts 23, whereby the vibration stiffness is increased.

On each transverse strut 23 wear protection devices 51 are provided on the side surfaces 23b as wear protection plates, which are clamped to fastening profiles 53. The fastening profiles 53 are clipped onto the threaded areas of the screws 38 with clip areas 53a and serve on the one hand as wear protection for the threaded areas of the screws 38 and on the other as profiles on which other components and in particular lateral wear protection plates 51 can be clamped. For this purpose, the fastening profiles 53 mushroom-shaped lugs 53b on each side, to which the wear protection plates 51 can be clamped with mushroom-shaped grooves.

On the upper side 23c of the transverse struts 23, upper wear protection plates 52 protect the cross strut against impacts, impacts or the direct abrasive attack of the bulk material. On the long sides lateral protective strips 52a are provided on the upper wear protection plates 52 which protrude downwards and overlap the lateral wear protection plates 51 to securely prevent from above falling bulk material from the cavity 51b between lateral wear protection plates 51 and the transverse strut 23.

A slipping down of the only clamped side wear protection plates 51 is effectively prevented by widened paragraphs 37a on the backing plate 37, which support the side wear plates 51 optionally from below.

Both the lateral wear protection plates 51 and the upper lateral wear protection plates 52 are received on the mounting anchors, so that the fastening anchors 9 fulfill a double function in a very advantageous manner by supporting the screen covering on the longitudinal struts 31 and reliably protect the cross struts 23 from wear. In addition, the fact that each longitudinal strut is secured at each end 31a with two screws on the fastening anchor 9, a rigid connection of the longitudinal struts 31 with each other and with the cross struts 23 allows, which also contributes to the rigidity of the screening machine 1.

The screening machine shown in the embodiment allows a modular design and a modular expansion of the screening machine, with a variable screen width can be selected by the flexible attachment of the longitudinal struts 31 to the cross braces 23, which screen lining systems of different manufacturers can be used.

Claims (16)

1. A vibrating screening machine (1), in particular for grading bulk material and the like,
   comprising a housing (2) and at least two sidewalls (3, 4) on which at least one screen deck (5-7) is mounted, on which a screen lining (8) is retained,
   and a drive means (19) to cause the screen deck (5-7) to vibrate,
   wherein via at least one material feed (10), bulk material to be screened is fed and via at least one fine-grain discharge (12), fine-grain bulk material, and via at least one coarse-grain discharge (11), coarse-grain bulk material is discharged,
   characterized in
   that at least the mounting points (14) provided on the sidewalls (34) for mounting at least one screen deck are aligned with a defined grid (15).
2. The vibrating screening machine (1) according to claim 1, wherein two or more screen decks (11-13) are provided whose mounting points (14) on the sidewalls (34) are aligned with the grid (15).
3. The vibrating screening machine (1) according to claim 1 or 2, wherein the grid (15) comprises grid points (16) aligned with an x-y system of coordinates whose x-coordinate (x) and whose y-coordinate (y) define a system angle.
4. The vibrating screening machine (1) according to claim 3, wherein the system angle is different from 90°.
5. The vibrating screening machine according to any of the preceding claims, wherein at least one screen deck (5-7) is disposed at a screen angle of inclination (18) relative to the horizontal (20).
6. The vibrating screening machine according to any of the preceding claims, wherein the grid distance (21) in the direction of the x-coordinate is different from the grid distance (22) in the direction of the y-coordinate.
7. The vibrating screening machine according to any of the preceding claims, wherein the cross-members (23) of the screen deck (5-7) are flange-mounted on the sidewalls (34) and wherein the mounting points (14) are aligned with the grid (15).
8. The vibrating screening machine according to any of the preceding claims, wherein the sidewall (3, 4) has at least one reinforcing unit (24) disposed on it that is connected with the sidewall (3, 4) and in particular forms a hollow profile.
9. The vibrating screening machine according to the preceding claim, wherein the reinforcing unit (24) through mounting means (26) is mounted on the sidewall whose mounting points (27) are aligned with the grid (15).
10. The vibrating screening machine according to the preceding claim, wherein at least some of the mounting points (27) for mounting the reinforcing unit (24) also serve for mounting the cross-members (23).
11. The vibrating screening machine according to any of the preceding claims, wherein vertical reinforcing units (28) are provided on the sidewall (3, 4) and aligned in particular substantially parallel to the y-coordinate (y).
12. The vibrating screening machine according to the preceding claim, wherein two reinforcing units (28) each and some of the cross-members (23) form one vertical frame (61) each which contributes to reinforcing the housing.
13. The vibrating screening machine according to any of the preceding claims, wherein longitudinal reinforcing units (29) are provided on the sidewall (3, 4) which are aligned in particular substantially parallel to the x-coordinate (x).
14. The vibrating screening machine according to the preceding claim, wherein some longitudinal reinforcing units (28) and some of the cross-members (23) form one longitudinal frame (62, 63) each which contributes to reinforcing the housing.
15. The vibrating screening machine according to at least one of the preceding claims, wherein some vertical reinforcing units (28) and some longitudinal reinforcing units (28) form one side frame (64) which contributes to reinforcing the housing.
16. The vibrating screening machine according to the preceding claim, wherein the sidewall (4, 5) is incorporated in the side frame (64).

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