EP3124194B1 - Mixing machine, in particular construction mixing machine for mixing mixing material, in particular for mixing mortars, plasters, screeds or concrete and process using such machine - Google Patents

Mixing machine, in particular construction mixing machine for mixing mixing material, in particular for mixing mortars, plasters, screeds or concrete and process using such machine Download PDF

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Publication number
EP3124194B1
EP3124194B1 EP15002282.0A EP15002282A EP3124194B1 EP 3124194 B1 EP3124194 B1 EP 3124194B1 EP 15002282 A EP15002282 A EP 15002282A EP 3124194 B1 EP3124194 B1 EP 3124194B1
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EP
European Patent Office
Prior art keywords
discharge chute
mixing
outlet opening
closure
closure element
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.)
Active
Application number
EP15002282.0A
Other languages
German (de)
French (fr)
Other versions
EP3124194A1 (en
Inventor
Alexander Essing
Herbert Buchberger
Michael Schmidt
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.)
Collomix GmbH
Original Assignee
Collomix GmbH
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 Collomix GmbH filed Critical Collomix GmbH
Priority to DK15002282.0T priority Critical patent/DK3124194T3/en
Priority to EP15002282.0A priority patent/EP3124194B1/en
Publication of EP3124194A1 publication Critical patent/EP3124194A1/en
Application granted granted Critical
Publication of EP3124194B1 publication Critical patent/EP3124194B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0806—Details; Accessories
    • B28C5/0818—Charging or discharging gates or chutes; Sealing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0893—Mobile mixing devices, e.g. hanging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
    • B28C5/163—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis in annularly-shaped containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/751—Discharging by opening a gate, e.g. using discharge paddles

Definitions

  • the invention relates to a mixing machine, in particular a construction mixer, for mixing mixes, in particular for mixing mortar, plaster, screed or concrete, according to the preamble of claim 1, and a method for operating or actuating a mixer for mixing mixes according to the preamble of claim 16.
  • Such mixing machines are generally known, for example from DE 10 2004 014 326 A1 which has a mixing machine with a mixing vessel called a mixing vessel and a drive motor for a mixer arranged in the mixing vessel, the mixing vessel having an upper, closable filling opening for the material to be mixed. Furthermore, a safety device is provided to secure the filling opening against reaching into it while the mixer is running, wherein the safety device can be secured and unlocked with a key element necessary for the operation of the drive motor. Unlocking the filling opening with the key element is therefore only possible when the drive motor is switched off. This means that the key element can either only be used to influence the drive motor, that is to say to switch it on or off, or to influence the safety device. Simultaneous use of the key element on the drive motor and at the security device is excluded. This should reliably avoid reaching into the mixing container while the mixer is running.
  • outlet opening of a mixing container which can regularly be closed by means of a closure element, also forms a further potential risk, in particular when the closure element is in an outlet position that releases the outlet opening.
  • the WO 2013/054308 A2 shows a closure element in the form of a protective cover. When this protective cover is in the open outlet position, the outlet opening is not closed and access to the interior of the container is therefore possible.
  • the U.S. 5,419,633 shows, in connection with a pivotable closure element, a cover by means of a protective grille.
  • the DE 1 280 116 A discloses a mixing machine for mixing mixed material, according to the preamble of claim 1, as well as a method for operating or actuating a mixing machine for mixing mixed material, according to the preamble of claim 16.
  • a further object of the invention is to provide a suitable method for operating or actuating the mixing machine.
  • a mixing machine in particular a construction mixer, for mixing mixed material, in particular for mixing mortar, plaster, screed or concrete, which has a mixing container with a mixing tool that can be received or received therein, which is in a container wall, preferably in a container bottom wall, having at least one outlet opening, which can be closed by means of at least one closure element, through which the mixed material can be discharged from the mixing container after the mixing process.
  • the at least one closure element (for example a swivel plate, to name just one example) can be displaced between a closure and / or mixed position that closes the at least one outlet opening and an outlet position that releases the at least one outlet opening.
  • a safety device which blocks a displacement of the closure element from the closed and / or mixed position into the outlet position if a safety device, which has an ejection chute assigned to the outlet opening that can be displaced between different positions or is formed by such, is not in one located for engaging the mixing container through the at least one outlet opening through screening position.
  • the discharge chute is also designed as a displaceable unit which can be displaced between different positions for Example is displaceable between a use position and a cleaning position. This possibility of displacing the discharge chute ensures that it can be transferred or moved into a cleaning position in which the discharge chute can be cleaned accordingly.
  • the discharge chute adjoins the outlet opening in its use position, so that when the closure element is in the outlet position, the mixed material can be discharged from the mixing container via the outlet opening and introduced into the discharge chute.
  • Such an ejection chute is technically simple and can also be manufactured inexpensively in terms of production technology, the ejection chute preferably having such a length and / or being dimensioned in this way (for example kinks, angles, constrictions, etc.) and / or with, for example, at least one safety element (for example protective grille) is equipped so that when a closure element is displaced into the outlet position, no access to the mixing container through the discharge chute or the at least one outlet opening is possible. This can be done in a simple manner.
  • the safety device further has at least one safety element or at least one safety element is assigned to the safety device, by means of which the safety device or at least one component of the safety device is not displaced into the outlet opening when a closure element is in the outlet position shielding position, preferably the displacement of the discharge chute from the basic position to the cleaning position, and by means of the closure element in the closed and / or mixed position, the displacement of the safety device or at least one component of the safety device into which the outlet opening cannot shielding position, preferably the displacement of the discharge chute between the basic and the cleaning position, can be released and / or the displacement of the closure element into the outlet position can be blocked.
  • Such a specific structure ensures in a simple manner that it is always ensured in the most varied of positions of the safety device, preferably an ejection chute as a safety device or as a component of the safety device, and regardless of the position of the closure element (in particular when the closure element is open) that no Intervention can take place from the outside through the outlet opening into the interior of the mixing container.
  • the safety device has a plurality of safety elements which are formed on the discharge chute and on the closure element and / or assigned to them and can be brought into different operative connections or are in different operative connections in the different positions of the closure element and / or in the different positions of the discharge chute on.
  • a closure element-side security element is provided, for example, that in the outlet position of the closure element interacts with a first ejection chute-side security element in such a way that displacement of the ejection chute is blocked.
  • the security element on the closure element In the closed and / or mixed position of the closure element, the security element on the closure element also interacts with a second security element on the ejection chute in such a way that a displacement of the ejection chute is enabled. And finally, in the closed and / or mixed position of the closure element, the security element on the closure element interacts with a third security element on the discharge chute in such a way that a Displacement of the closure element is blocked.
  • a blockage or release of the displacement of both the ejection chute and the closure element can be achieved in a functionally reliable manner in a manner that is less complex in terms of components and more favorable in terms of production technology.
  • the security element on the locking side can be formed by a raised locking element formed on the locking element, for example by a locking bolt protruding from the locking element.
  • a raised locking element in particular in the form of a protruding locking bolt, is easy to manufacture and, with appropriate dimensions, has a long service life even in rough construction site operations.
  • the first ejection chute-side safety element is then preferably formed by a first ejection chute-side stop element on which the locking element rests in the outlet position of the closure element in such a way that a displacement of the ejection chute between its use and cleaning position is blocked.
  • the second safety element on the ejector chute is preferably formed by a recess on the ejector chute, through which the locking element can be passed unhindered when the ejector chute is displaced between the use and cleaning position and a closure element in the closed and / or mixed position.
  • the third safety element on the ejector chute is formed by a second stop element on the ejector chute, on which the locking element rests in the closed and / or mixed position of the closure element in such a way that a displacement of the closure element into its outlet position is blocked.
  • the safety element configurations on the ejection chute are also to be designed in a structurally simple manner and thus produce an overall effect compact and functionally reliable structure of the safety device.
  • the closure element can in principle be designed in the most varied of ways.
  • an embodiment is particularly preferred in which the closure element, preferably formed by a closure plate or plate-shaped, is mounted pivotable about a pivot axis in the area of the outlet opening, preferably formed at the edge in the bottom wall of the mixing container.
  • a pivotable mounting of the closure element By means of such a pivotable mounting of the closure element, a particularly functionally reliable and easy-to-use release or closure of the outlet opening can be achieved by a simple pivoting movement.
  • a pivot bearing of this type is also particularly advantageous in particular for rough construction site operation and is characterized by a long service life when appropriately dimensioned.
  • the preferably box-shaped and / or tubular discharge chute is alternatively or additionally extendable in the manner of a drawer in the area of the outlet opening, which is preferably formed at the edge in the bottom wall of the mixing container.
  • a drawer-like extension of the discharge chute can be implemented in a simple manner using, for example, telescopic rails.
  • Such a drawer-like pull-out option for the discharge chute is also particularly suitable for rough construction site operations because it is stable and functionally reliable in the Handling is.
  • such an ejection chute which can be pulled out like a drawer with a linear adjustment device, for example, can be moved easily and quickly between the different positions.
  • latching lugs or locking elements that can be pushed over can be arranged, which release the displacement of the discharge chute from the use position to the cleaning position only after overcoming a certain holding force predetermined by the locking elements which in turn also has the effect that the discharge chute cannot wander out of the position of use in an undesired manner.
  • the locking element is arranged on the underside of the closure element assigned to the discharge chute, preferably in such a way that the locking element in the pivoted position corresponding to the closed and / or mixed position is assigned to the discharge chute-side recess, which is located in an upper recess facing the outlet opening Edge area of the discharge chute wall is formed, and furthermore such that the locking element rests in the pivot position corresponding to the outlet position on the upper edge area of the discharge chute facing the outlet opening and forming the first discharge chute-side stop element.
  • a specific structure is particularly preferred in which the outlet opening and / or the upper edge region of the discharge chute wall forming the discharge chute-side recess and the first discharge chute-side stop element one of the circular pivoting movement or the pivoting radius of the locking element when the Closure element between the closed and / or mixed position and the outlet position has adapted and / or substantially corresponding curvature or radius.
  • the locking element which is preferably arranged in a corner and / or edge-side area of the closure element, is pivoted, starting from the closed and / or mixed position completely closing the outlet opening, from the area having the discharge chute-side recess of the upper edge area of the discharge chute, can be brought into contact with the adjoining area of the upper edge area of the discharge chute that forms the first stop element and / or with the outlet opening edge area. It can thereby be ensured that in the course of the pivoting of the closure element into an outlet position that releases the outlet opening more and more, a guided, sliding abutment takes place, which contributes significantly to increasing the overall functional reliability.
  • the outlet opening of the discharge chute assigned to the outlet opening and thus at least one upper edge area of the discharge chute wall assigned to the outlet opening and / or the preferably plate-shaped closure element also preferably has a geometry that essentially corresponds to the geometry of the outlet opening, for example a crescent-like geometry. This ensures that the outlet opening is reliably closed at all times.
  • the second discharge chute-side stop element preferably protrudes from the outer wall of the discharge chute in such a way that the locking element-side locking element, with a closing element in the closed and / or mixed position and a transition of the discharge chute from the use position to the cleaning position, is in a contact blocking the displacement, preferably the pivoting of the closure element, reaches at least the second stop element on the discharge chute.
  • a second discharge chute-side stop element designed in this way can be arranged in the simplest possible manner on the outer wall of the discharge chute, preferably in the form of a plate-like and / or fin-like and / or rib-like component.
  • the closure element rests in a sliding manner on an outlet opening edge region that delimits the outlet opening at least in some areas.
  • the outlet opening edge area is assigned to the second discharge chute-side stop element when the discharge chute passes from the use position to the cleaning position in such a way that both elements together can block the displacement, in particular the pivoting of the locking element, in a particularly reliable manner.
  • the pivot axis of the preferably pivotable closure element is preferably aligned in the vertical axis direction and is formed in an area of a container side wall adjoining the container bottom wall, preferably substantially vertically upward, which is directly associated with the outlet opening on the bottom wall.
  • this or this is preferably provided with an actuation element, for example with a handle as an actuation element.
  • a particularly advantageous protective function is also achieved when a protective grille is arranged in the discharge chute, preferably in an opening area of the discharge chute facing away from the outlet opening. With regard to its mesh size, this protective grille is then preferably dimensioned in such a way that it cannot be reached with the hand.
  • a rotating mixing tool that can be driven by means of a drive arranged on the mixing machine, preferably on the mixing container, can be received and arranged in the mixing container.
  • the upwardly open mixing container can be closed by means of an openable cover, preferably by means of an openable cover which is hinged to the mixing container and provided with a protective grille.
  • the protective grille can preferably again have a mesh size that does not allow the hand or, if necessary, individual fingers to reach into the mixing container from above.
  • the mixing container can also be carried, for example, by a frame, preferably provided with wheels.
  • FIG. 1 is shown schematically and in perspective an exemplary embodiment of a mixer 1 according to the invention, which can serve as a construction mixer for mixing mortar, plaster, screed or concrete.
  • the mixing machine 1 has a mixing container 3 mounted or supported on a frame 2.
  • the frame 2 has a plurality of frame feet 4 spaced apart from one another on the circumference, with the two in the plane of the drawing Fig. 1 rear frame feet 4 a transverse or wheel axle 5 together with wheels 6 rotatably mounted thereon is supported.
  • the mixing container 3 has a cylindrical side wall 8 and a bottom wall 7 which closes the mixing container 3 at the bottom.
  • a motor and gear unit 9 which drives a mixing tool 10 received in the interior of the mixing container 3 in a rotating manner.
  • the upwardly open mixing container 3 is closed by means of a cover 11 which is preferably pivotably mounted on the side wall 8 and which is provided with a protective grille 12 which has a mesh size such that it is not possible to reach through with one hand.
  • this protective grille 12 is arranged so far above the mixing tool 10 that there is no danger to the fingers from the rotating mixing tool 10 even if the fingers are pushed through.
  • a transport handle 13 is arranged in the rear region of the side wall 8, by means of which the tilted structure standing on the wheels 6 can be easily handled during the process.
  • control or electrical unit 14 which is used to control the motor and gear unit 9, is arranged here, for example, in the front area of the bottom wall 7.
  • an outlet opening 15, here semicircular or crescent-shaped is formed in an edge-side bottom wall area, which can be closed by means of a preferably plate-shaped closure element 17, preferably a swivel plate, which can be swiveled about a vertically aligned swivel axis 16 (see FIG Fig. 2a ).
  • the pivot axis 16 (see also Fig. 1 ) is thus oriented in the direction of the vertical axis and is formed in an area of the side wall 8 that adjoins vertically upwards there directly associated with the outlet opening 15 on the bottom wall.
  • a handle 18 is furthermore arranged, which, as shown in particular from FIG Fig. 2a and the Figure 2c which each show the closure element 17 in a closure and / or mixing position 19 that completely covers the outlet opening 15, here for example in a central area, is bent so that the handle end 20 to be gripped by hand is in this closure and / or
  • the mixing position of the closure element 17 is at a distance from the side wall 8 of the mixing container 3 and can thus be easily grasped from behind or grasped by an operator.
  • the material to be mixed is to be discharged from the mixing container 3, an operator can remove the closure element 17 by means of the handle 18 from the Fig. 2a Closure and / or mixing position 19 shown in the Figure 2b Pivot shown outlet position 21, in which the outlet opening 15 is at least partially released.
  • the mixed material can then flow out of the mixing container 3 or be discharged via the outlet opening 15.
  • the outlet opening 15 adjoins the outlet opening 15 downwards, away from the bottom wall 7, essentially immediately an ejection chute 22, here merely exemplary in the form of a box or tube, which at least in the area of its mouth opening assigned to the outlet opening 15, here as a whole as an example, has a semicircular or crescent cross-sectional geometry that corresponds to the outlet opening 15 and is therefore exemplary here.
  • This discharge chute 22 thus extends the outlet opening 15 in the, in the Figure 2b and Figure 3b outlet position 21 of the closure element 17 shown downwards in such a way that the mixed material flowing or discharged from the mixing container 3 can be introduced via the outlet opening 15 into the discharge chute 22 and from there, for example, into a container placed under the lower mouth opening of the discharge chute 22.
  • a protective grille 23 is arranged in the area of the lower mouth opening of the discharge chute, the mesh size of which is again selected here so that reaching with the hand to the outlet opening 15 in the bottom wall 7 and thus into the interior of the mixing container 3 is prevented is.
  • Such a protective grille 23 is particularly advantageous when the discharge chute 22, as only exemplified in FIG Fig. 1 shown, has a relatively short overall length, so that there is possibly the risk that the hand could reach into the area of the outlet opening 15 from below through the discharge chute 22.
  • the discharge chute could also have such a length and / or be dimensioned such that such an engagement from below through the discharge chute 22 to the outlet opening 15 and from there into the mixing container 3 is not possible.
  • the discharge chute is suspended or held displaceably on the underside of the bottom wall 7 in the manner of a drawer by means of a linear adjustment device, for example a linear adjustment device formed here merely by way of example by two telescopic rails 24, so that the discharge chute 22 by means of this here by way of example the telescopic rails 24 formed linear adjustment of its in the Figures 3a and 3b Use position 25 shown and thus away from the outlet opening 15 into the position shown in FIG Figure 3c shown cleaning position 26 can be moved or pulled out.
  • a linear adjustment device for example a linear adjustment device formed here merely by way of example by two telescopic rails 24, so that the discharge chute 22 by means of this here by way of example the telescopic rails 24 formed linear adjustment of its in the Figures 3a and 3b Use position 25 shown and thus away from the outlet opening 15 into the position shown in FIG Figure 3c shown cleaning position 26 can be moved or pulled out.
  • a safety device which, in addition to the discharge chute 22, also includes, among other things, a locking element 27, which is designed here as an example and preferably as a locking bolt on an underside of the plate-like closure element 17 assigned to the discharge chute 22.
  • This locking element 27 protrudes from the underside 28 of the closure element 17 and is arranged there in a corner and edge area, in particular in a corner and edge transition area between the two long sides of the closure element 17.
  • the locking element 27 is assigned to an ejection chute-side recess 29 formed in an upper edge region 32 of the ejection chute wall, through which the locking element 27 when the ejection chute 22 is displaced from the one shown in FIG Fig. 3a
  • Use position 25 shown in the Figure 3c shown cleaning position 26 (and back) can be passed through unhindered.
  • the closure element 17 can be transferred from the closed and / or mixed position 19 shown there into the outlet position 21, a plate-like or rib-like stop element 30 protrudes further away from the outer wall of the discharge chute.
  • the locking element 27 in the closed and / or mixed position 19 of the closure element 17 is assigned to this stop element 30 in such a way that the stop element 30 blocks or prevents pivoting of the closure element 17 about the pivot axis 16 into the outlet position 21.
  • the closure element 17 rests, for example, in a sliding manner on an outlet opening edge region 31 which delimits the outlet opening 15 at the edge and which here in turn can only optionally or, for example, also interact with the stop element 30 in such a way that both elements together facilitate the displacement of the locking element 27 and thus block or prevent the pivoting of the closure element 17.
  • this stop element 30 protruding from the outer wall of the ejection chute 22 no longer blocks the locking element 27 in the inserted use position 25 of the ejection chute 22, in which the ejection chute 22 adjoins the outlet opening 15, so that this locking element 27 is no longer blocked when the closure element is pivoted 17 around the pivot axis 16 from the first corner or edge-side area 33 of the discharge chute 22 assigned to the recess 29, here by way of example by about 180 °, along the outlet opening edge area 31 or along the upper edge area 32 of the discharge chute wall (and thus also away from the discharge chute-side recess 29) in the Figure 3c shown opposite second corner or edge-side area 34 of the discharge chute 22 is displaced.
  • the locking element 27 then rests directly on the upper edge region 32 of the discharge chute wall, so that the locking element 27 blocks the pulling out of the discharge chute 22. This also ensures that, due to the lack of the possibility of displacement of the discharge chute 22 as a component of the safety device from the outlet opening 15, no access can take place via the outlet opening 15 into the mixing container 3.
  • the pivoting radius of the locking element 27 and thus also the curvature of the upper edge region 32 of the discharge chute 22 is hereby given by the distance between the locking element 27 and the pivot axis 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Description

Die Erfindung betrifft eine Mischmaschine, insbesondere eine Baumischmaschine, zum Mischen von Mischgut, insbesondere zum Mischen von Mörteln, Putzen, Estrichen oder Beton, nach dem Oberbegriff des Anspruchs 1 , sowie ein Verfahren zur Bedienung oder Betätigung einer Mischmaschine zum Mischen von Mischgut nach dem Oberbegriff des Anspruchs 16.The invention relates to a mixing machine, in particular a construction mixer, for mixing mixes, in particular for mixing mortar, plaster, screed or concrete, according to the preamble of claim 1, and a method for operating or actuating a mixer for mixing mixes according to the preamble of claim 16.

Derartige Mischmaschinen sind allgemein bekannt, zum Beispiel aus der DE 10 2004 014 326 A1 , die eine Mischmaschine mit einem als Mischkessel bezeichneten Mischbehälter und einem Antriebsmotor für ein in dem Mischbehälter angeordnetes Mischwerk aufweist, wobei der Mischbehälter eine obere verschließbare Einfüllöffnung für das Mischgut aufweist. Ferner ist eine Sicherungseinrichtung vorgesehen, um die Einfüllöffnung gegen ein Hineingreifen bei laufendem Mischwerk zu sichern, wobei die Sicherungseinrichtung mit einem für den Betrieb des Antriebsmotors notwendigen Schlüsselelement gesichert und entsichert werden kann. Eine Entsicherung der Einfüllöffnung mit dem Schlüsselelement ist somit nur dann möglich, wenn der Antriebsmotor ausgeschaltet ist. Das heißt, es kann mit dem Schlüsselelement entweder nur eine Einflussnahme auf den Antriebsmotor, das heißt ein Ein- oder Ausschalten vorgenommen werden oder aber eine Einflussnahme auf die Sicherungseinrichtung vorgenommen werden. Eine gleichzeitige Verwendung des Schlüsselelements am Antriebsmotor und an der Sicherungseinrichtung ist ausgeschlossen. Dadurch soll ein Hineingreifen in den Mischbehälter bei laufendem Mischwerk zuverlässig vermeidbar sein.Such mixing machines are generally known, for example from DE 10 2004 014 326 A1 which has a mixing machine with a mixing vessel called a mixing vessel and a drive motor for a mixer arranged in the mixing vessel, the mixing vessel having an upper, closable filling opening for the material to be mixed. Furthermore, a safety device is provided to secure the filling opening against reaching into it while the mixer is running, wherein the safety device can be secured and unlocked with a key element necessary for the operation of the drive motor. Unlocking the filling opening with the key element is therefore only possible when the drive motor is switched off. This means that the key element can either only be used to influence the drive motor, that is to say to switch it on or off, or to influence the safety device. Simultaneous use of the key element on the drive motor and at the security device is excluded. This should reliably avoid reaching into the mixing container while the mixer is running.

Ein weiteres Gefahrenpotential bildet jedoch auch die regelmäßig mittels eines Verschlusselementes verschließbare Auslassöffnung eines Mischbehälters, insbesondere dann, wenn sich das Verschlusselement in einer die Auslassöffnung freigebenden Auslassstellung befindet.However, the outlet opening of a mixing container, which can regularly be closed by means of a closure element, also forms a further potential risk, in particular when the closure element is in an outlet position that releases the outlet opening.

Die WO 2013/054308 A2 zeigt ein Verschlusselement in Form einer Schutzabdeckung. Wenn sich diese Schutzabdeckung in der geöffneten Auslassstellung befindet, ist die Auslassöffnung nicht verschlossen und somit ein Eingriff in das Innere des Behälters möglich.The WO 2013/054308 A2 shows a closure element in the form of a protective cover. When this protective cover is in the open outlet position, the outlet opening is not closed and access to the interior of the container is therefore possible.

Die US 5,419,633 zeigt in Verbindung mit einem verschwenkbaren Verschlusselement eine Abdeckung mittels eines Schutzgitters. Die DE 1 280 116 A offenbart eine Mischmaschine zum Mischen von Mischgut, gemäß dem Oberbegriff des Anspruchs 1, sowie ein Verfahren zur Bedienung oder Betätigung einer Mischmaschine zum Mischen von Mischgut, gemäß dem Oberbegriff des Anspruchs 16.The U.S. 5,419,633 shows, in connection with a pivotable closure element, a cover by means of a protective grille. The DE 1 280 116 A discloses a mixing machine for mixing mixed material, according to the preamble of claim 1, as well as a method for operating or actuating a mixing machine for mixing mixed material, according to the preamble of claim 16.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Mischmaschine, insbesondere eine Baumischmaschine, zum Mischen von Mischgut, insbesondere zum Mischen von Mörteln, Putzen, Estrichen oder Beton, bereitzustellen, mittels der die Gefahr eines Eingriffs in den Mischbehälter durch eine Mischgut-Auslassöffnung hindurch auf einfache Weise funktionssicher vermieden bzw. wesentlich verringert werden kann. Des Weiteren ist es Aufgabe der Erfindung ein geeignetes Verfahren zum Bedienen bzw. Betätigen der Mischmaschine zur Verfügung zu stellen.It is therefore the object of the present invention to provide a mixing machine, in particular a construction mixer, for mixing mixes, in particular for mixing mortar, plaster, screed or concrete, by means of which there is the risk of reaching into the mixing container through a mix outlet opening can be avoided or significantly reduced in a simple manner in a functionally reliable manner. A further object of the invention is to provide a suitable method for operating or actuating the mixing machine.

Diese Aufgabe wird gelöst mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen sind Gegenstand der darauf rückbezogenen Unteransprüche.This object is achieved with the features of claim 1. Advantageous refinements are the subject of the dependent claims which refer back to them.

Gemäß Anspruch 1 wird eine Mischmaschine, insbesondere eine Baumischmaschine, zum Mischen von Mischgut, insbesondere zum Mischen von Mörteln, Putzen, Estrichen oder Beton, vorgeschlagen, die einen Mischbehälter mit einem darin aufnehmbaren bzw. aufgenommenen Mischwerkzeug aufweist, der in einer Behälterwand, vorzugsweise in einer Behälterbodenwand, wenigstens eine, mittels wenigstens eines Verschlusselementes verschließbare Auslassöffnung aufweist, durch die das Mischgut nach dem Mischvorgang aus dem Mischbehälter ausgebracht werden kann. Das wenigstens eine Verschlusselement (zum Beispiel eine Schwenkplatte, um nur ein Beispiel zu nennen) ist zwischen einer die wenigstens eine Auslassöffnung verschließenden Verschluss- und/oder Mischstellung und einer die wenigstens eine Auslassöffnung freigebenden Auslassstellung verlagerbar. Erfindungsgemäß ist eine Sicherungseinrichtung vorgesehen, die eine Verlagerung des Verschlusselementes von der Verschluss- und/oder Mischstellung in die Auslassstellung blockiert, wenn sich eine Sicherheitseinrichtung, die einen der Auslassöffnung zugeordneten, zwischen unterschiedlichen Positionen verlagerbaren Auswurfschacht aufweist oder durch einen solchen ausgebildet ist, nicht in einer, die Auslassöffnung für einen Eingriff in den Mischbehälter durch die wenigstens eine Auslassöffnung hindurch abschirmenden Position befindet.According to claim 1, a mixing machine, in particular a construction mixer, for mixing mixed material, in particular for mixing mortar, plaster, screed or concrete, is proposed, which has a mixing container with a mixing tool that can be received or received therein, which is in a container wall, preferably in a container bottom wall, having at least one outlet opening, which can be closed by means of at least one closure element, through which the mixed material can be discharged from the mixing container after the mixing process. The at least one closure element (for example a swivel plate, to name just one example) can be displaced between a closure and / or mixed position that closes the at least one outlet opening and an outlet position that releases the at least one outlet opening. According to the invention, a safety device is provided which blocks a displacement of the closure element from the closed and / or mixed position into the outlet position if a safety device, which has an ejection chute assigned to the outlet opening that can be displaced between different positions or is formed by such, is not in one located for engaging the mixing container through the at least one outlet opening through screening position.

Mit einer derartigen erfindungsgemäßen Sicherungseinrichtung wird auf einfache und funktionssichere Weise sichergestellt, dass kein Eingriff mit der Hand durch die wenigstens eine Auslassöffnung des Mischbehälters von außerhalb des Mischbehälters her in den Mischbehälterinnenraum möglich ist. Dadurch kann die Arbeits- und Betriebssicherheit der erfindungsgemäßen Mischmaschine auf einfache Weise erhöht werden.With such a safety device according to the invention it is ensured in a simple and functionally reliable manner that no hand intervention is possible through the at least one outlet opening of the mixing container from outside the mixing container into the interior of the mixing container. As a result, the work and operational safety of the mixer according to the invention can be increased in a simple manner.

Der Auswurfschacht ist weiter erfindungsgemäß als verlagerbare Einheit ausgebildet, die zwischen unterschiedlichen Positionen verlagerbar ist, zum Beispiel zwischen einer Gebrauchsposition und einer Reinigungsposition verlagerbar ist. Durch diese Verlagerungsmöglichkeit des Auswurfschachtes ist sichergestellt, dass dieser in eine Reinigungsposition überführt bzw. verlagert werden kann, in der der Auswurfschacht entsprechend gereinigt werden kann.According to the invention, the discharge chute is also designed as a displaceable unit which can be displaced between different positions for Example is displaceable between a use position and a cleaning position. This possibility of displacing the discharge chute ensures that it can be transferred or moved into a cleaning position in which the discharge chute can be cleaned accordingly.

Weiter ist erfindungsgemäß vorgesehen, dass sich der Auswurfschacht in seiner Gebrauchsposition an die Auslassöffnung anschließt, so dass das Mischgut bei sich in der Auslassstellung befindlichem Verschlusselement über die Auslassöffnung aus dem Mischbehälter ausbringbar und in den Auswurfschacht einbringbar ist. Ein derartiger Auswurfschacht ist technisch einfach aufgebaut und zudem auch fertigungstechnisch preiswert herstellbar, wobei der Auswurfschacht bevorzugt eine solche Länge aufweist und/oder so dimensioniert (zum Beispiel Knicke, Winkel, Einschnürung etc.) ist und/oder so mit zum Beispiel wenigstens einem Sicherheitselement (zum Beispiel Schutzgitter) ausgestattet ist, dass bei einem sich in die Auslassstellung verlagerten Verschlusselement kein Eingriff in den Mischbehälter durch den Auswurfschacht bzw. die wenigstens eine Auslassöffnung hindurch möglich ist. Dies lässt sich auf einfache Weise bewerkstelligen.It is further provided according to the invention that the discharge chute adjoins the outlet opening in its use position, so that when the closure element is in the outlet position, the mixed material can be discharged from the mixing container via the outlet opening and introduced into the discharge chute. Such an ejection chute is technically simple and can also be manufactured inexpensively in terms of production technology, the ejection chute preferably having such a length and / or being dimensioned in this way (for example kinks, angles, constrictions, etc.) and / or with, for example, at least one safety element ( for example protective grille) is equipped so that when a closure element is displaced into the outlet position, no access to the mixing container through the discharge chute or the at least one outlet opening is possible. This can be done in a simple manner.

Gemäß einer besonders bevorzugten konkreten Ausgestaltung weist die Sicherungseinrichtung weiter wenigstens ein Sicherungselement auf bzw. ist der Sicherungseinrichtung wenigstens ein Sicherungselement zugeordnet, mittels dem bei einem sich in der Auslassstellung befindlichem Verschlusselement die Verlagerung der Sicherheitseinrichtung bzw. zumindest eines Bestandteils der Sicherheitseinrichtung in die die Auslassöffnung nicht abschirmende Position, vorzugsweise die Verlagerung des Auswurfschachtes von der Grundposition in die Reinigungsposition, blockierbar ist und mittels dem bei sich in der Verschluss- und/oder Mischstellung befindlichem Verschlusselement die Verlagerung der Sicherheitseinrichtung bzw. zumindest eines Bestandteils der Sicherheitseinrichtung in die die Auslassöffnung nicht abschirmende Position, vorzugsweise die Verlagerung des Auswurfschachtes zwischen der Grund- und der Reinigungsposition, freigebbar und/oder die Verlagerung des Verschlusselementes in die Auslassstellung blockierbar ist. Mit einem derartigen konkreten Aufbau wird auf einfache Weise sichergestellt, dass in den unterschiedlichsten Positionen der Sicherheitseinrichtung, vorzugsweise eines Auswurfschachtes als Sicherheitseinrichtung bzw. als Bestandteil der Sicherheitseinrichtung, sowie unabhängig von der Position des Verschlusselementes (insbesondere bei geöffnetem Verschlusselement) stets sichergestellt ist, dass kein Eingriff von außen her durch die Auslassöffnung hindurch in den Innenraum des Mischbehälters erfolgen kann.According to a particularly preferred specific embodiment, the safety device further has at least one safety element or at least one safety element is assigned to the safety device, by means of which the safety device or at least one component of the safety device is not displaced into the outlet opening when a closure element is in the outlet position shielding position, preferably the displacement of the discharge chute from the basic position to the cleaning position, and by means of the closure element in the closed and / or mixed position, the displacement of the safety device or at least one component of the safety device into which the outlet opening cannot shielding position, preferably the displacement of the discharge chute between the basic and the cleaning position, can be released and / or the displacement of the closure element into the outlet position can be blocked. Such a specific structure ensures in a simple manner that it is always ensured in the most varied of positions of the safety device, preferably an ejection chute as a safety device or as a component of the safety device, and regardless of the position of the closure element (in particular when the closure element is open) that no Intervention can take place from the outside through the outlet opening into the interior of the mixing container.

Gemäß einer hierzu besonders bevorzugten konkreten Ausgestaltung weist die Sicherungseinrichtung mehrere, an dem Auswurfschacht und an dem Verschlusselement ausgebildete und/oder diesen zugeordnete sowie in den unterschiedlichen Stellungen des Verschlusselementes und/oder in den unterschiedlichen Positionen des Auswurfschachtes miteinander in unterschiedliche Wirkverbindungen bringbare bzw. stehende Sicherheitselemente auf. Gemäß einer besonders bevorzugten konkreten Ausgestaltung ist beispielsweise ein verschlusselementseitiges Sicherheitselement vorgesehen, dass in der Auslassstellung des Verschlusselementes mit einem ersten auswurfschachtseitigen Sicherheitselement dergestalt zusammenwirkt, dass eine Verlagerung des Auswurfschachtes blockiert ist. Das verschlusselementseitige Sicherheitselement wirkt weiter in der Verschluss- und/oder Mischstellung des Verschlusselementes mit einem zweiten auswurfschachtseitigen Sicherheitselement dergestalt zusammen, dass eine Verlagerung des Auswurfschachtes freigegeben ist. Und schließlich wirkt das verschlusselementseitige Sicherheitselement in der Verschluss- und/oder Mischstellung des Verschlusselementes mit einem dritten auswurfschachtseitigen Sicherheitselement dergestalt zusammen, dass eine Verlagerung des Verschlusselementes blockiert ist. Hier kann somit mit einem einzigen verschlusselementseitigen Sicherheitselement in bauteiltechnisch wenig aufwändiger und herstellungstechnisch günstiger Weise eine Blockade bzw. Freigabe der Verlagerung von sowohl dem Auswurfschacht als auch dem Verschlusselement in funktionssicherer Weise erzielt werden.According to a specific embodiment particularly preferred for this purpose, the safety device has a plurality of safety elements which are formed on the discharge chute and on the closure element and / or assigned to them and can be brought into different operative connections or are in different operative connections in the different positions of the closure element and / or in the different positions of the discharge chute on. According to a particularly preferred specific embodiment, a closure element-side security element is provided, for example, that in the outlet position of the closure element interacts with a first ejection chute-side security element in such a way that displacement of the ejection chute is blocked. In the closed and / or mixed position of the closure element, the security element on the closure element also interacts with a second security element on the ejection chute in such a way that a displacement of the ejection chute is enabled. And finally, in the closed and / or mixed position of the closure element, the security element on the closure element interacts with a third security element on the discharge chute in such a way that a Displacement of the closure element is blocked. Here, with a single security element on the closure element side, a blockage or release of the displacement of both the ejection chute and the closure element can be achieved in a functionally reliable manner in a manner that is less complex in terms of components and more favorable in terms of production technology.

Gemäß einer besonders bevorzugten konkreten Bauweise kann hierbei das verschlussseitige Sicherheitselement durch ein am Verschlusselement ausgebildetes, erhabenes Arretierelement, zum Beispiel durch einen vom Verschlusselement abstehenden Arretierbolzen, gebildet sein. Ein derartiges erhabenes Arretierelement, insbesondere in Form eines abstehenden Arretierbolzens, ist einfach herzustellen und weist bei einer entsprechenden Dimensionierung auch im rauen Baustellenbetrieb eine hohe Lebensdauer auf. Das erste auswurfschachtseitige Sicherheitselement ist dann bevorzugt durch ein erstes auswurfschachtseitiges Anschlagelement gebildet, an dem das Arretierelement in der Auslassstellung des Verschlusselementes dergestalt anliegt, dass eine Verlagerung des Auswurfschachtes zwischen dessen Gebrauchs- und Reinigungsposition blockiert ist. Weiter ist das zweite auswurfschachtseitige Sicherheitselement bevorzugt durch eine auswurfschachtseitige Ausnehmung gebildet, durch die das Arretierelement bei einer Verlagerung des Auswurfschachtes zwischen der Gebrauchs- und der Reinigungsposition und einem sich in der Verschluss- und/oder Mischstellung befindlichen Verschlusselement ungehindert hindurchgeführt werden kann. Und schließlich ist bevorzugt vorgesehen, dass das dritte auswurfschachtseitige Sicherheitselement durch ein zweites auswurfschachtseitiges Anschlagelement gebildet ist, an dem das Arretierelement in der Verschluss- und/oder Mischstellung des Verschlusselementes dergestalt anliegt, dass eine Verlagerung des Verschlusselementes in dessen Auslassstellung blockiert ist. Auch die auswurfschachtseitigen Sicherheitselementausgestaltungen sind auf baulich einfache Weise auszubilden und bewirken damit einen insgesamt kompakten und funktionssicheren Aufbau der Sicherheitseinrichtung. Ausdrücklich sollen auch äquivalente Maßnahmen bzw. kinematische Umkehrungen hierzu vom Schutzumfang erfasst sein, das heißt, dass zum Beispiel erhabene Elemente Ausnehmungen sein können und dass Ausnehmungen erhabene Elemente sein können, um nur ein Beispiel zu nennen. Dies gilt selbstverständlich auch für die nachfolgend noch weiter erläuterten, bevorzugten optionalen Ausgestaltungen hierzu.According to a particularly preferred specific construction, the security element on the locking side can be formed by a raised locking element formed on the locking element, for example by a locking bolt protruding from the locking element. Such a raised locking element, in particular in the form of a protruding locking bolt, is easy to manufacture and, with appropriate dimensions, has a long service life even in rough construction site operations. The first ejection chute-side safety element is then preferably formed by a first ejection chute-side stop element on which the locking element rests in the outlet position of the closure element in such a way that a displacement of the ejection chute between its use and cleaning position is blocked. Furthermore, the second safety element on the ejector chute is preferably formed by a recess on the ejector chute, through which the locking element can be passed unhindered when the ejector chute is displaced between the use and cleaning position and a closure element in the closed and / or mixed position. Finally, it is preferably provided that the third safety element on the ejector chute is formed by a second stop element on the ejector chute, on which the locking element rests in the closed and / or mixed position of the closure element in such a way that a displacement of the closure element into its outlet position is blocked. The safety element configurations on the ejection chute are also to be designed in a structurally simple manner and thus produce an overall effect compact and functionally reliable structure of the safety device. Equivalent measures or kinematic reversals are also expressly intended to be covered by the scope of protection, that is to say that, for example, raised elements can be recesses and that recesses can be raised elements, to name just one example. Of course, this also applies to the preferred optional configurations for this purpose, which are explained in more detail below.

Das Verschlusselement kann grundsätzlich auf verschiedenste Art und Weise ausgebildet sein. Besonders bevorzugt ist jedoch eine Ausgestaltung, bei der das, vorzugsweise durch eine Verschlussplatte bzw. plattenförmig ausgebildete, Verschlusselement um eine Schwenkachse verschwenkbar im Bereich der, vorzugsweise randseitig in der Bodenwand des Mischbehälters ausgebildeten, Auslassöffnung gelagert ist. Mittels einer derartigen schwenkbaren Lagerung des Verschlusselementes kann eine besonders funktionssichere und einfach handzuhabene Freigabe bzw. Schließen der Auslassöffnung durch eine einfache Schwenkbewegung erzielt werden. Zudem ist eine derartige Schwenklagerung auch insbesondere für den rauen Baustellenbetrieb besonders vorteilhaft und zeichnet sich bei einer entsprechenden Dimensionierung durch eine hohe Lebensdauer aus.The closure element can in principle be designed in the most varied of ways. However, an embodiment is particularly preferred in which the closure element, preferably formed by a closure plate or plate-shaped, is mounted pivotable about a pivot axis in the area of the outlet opening, preferably formed at the edge in the bottom wall of the mixing container. By means of such a pivotable mounting of the closure element, a particularly functionally reliable and easy-to-use release or closure of the outlet opening can be achieved by a simple pivoting movement. In addition, a pivot bearing of this type is also particularly advantageous in particular for rough construction site operation and is characterized by a long service life when appropriately dimensioned.

Gemäß einer weiteren besonders bevorzugten Ausführungsform ist der, vorzugsweise kasten- und/oder röhrenförmig ausgebildete, Auswurfschacht alternativ oder zusätzlich schubladenartig ausziehbar im Bereich der, vorzugsweise randseitig in der Bodenwand des Mischbehälters ausgebildeten, Auslassöffnung gelagert. Ein derartiges schubladenartiges Ausziehen des Auswurfschachtes kann auf einfache Weise über zum Beispiel Teleskopschienen realisiert werden. Auch eine derartige schubladenartige Ausziehmöglichkeit des Auswurfschachtes eignet sich besonders gut für den rauen Baustellenbetrieb, weil diese stabil und funktionssicher in der Handhabung ist. Zudem kann ein derartiger zum Beispiel mit einer Linearverstelleinrichtung schubladenartig ausziehbarer Auswurfschacht einfach und schnell zwischen den unterschiedlichen Positionen verlagert werden. Dabei können im Bereich der zum Beispiel Teleskopschienen, an denen der Auswurfschacht aufgehängt bzw. gelagert ist, überdrückbare Rastnasen bzw. Rastelemente angeordnet sein, die die Verlagerung des Auswurfschachts von der Gebrauchsposition in die Reinigungsposition erst nach Überwinden einer bestimmten, durch die Rastelemente vorgegebenen Haltekraft freigeben, was wiederum auch bewirkt, dass der Auswurfschacht nicht in unerwünschter Weise aus der Gebrauchsposition herauswandern kann. Es versteht sich, dass selbstverständlich auch nur ein einziges Rastelement vorgesehen sein kann; der Plural in Verbindung mit den Rastelementen ist hier nur als Gattungsbegriff zu verstehen.According to a further particularly preferred embodiment, the preferably box-shaped and / or tubular discharge chute is alternatively or additionally extendable in the manner of a drawer in the area of the outlet opening, which is preferably formed at the edge in the bottom wall of the mixing container. Such a drawer-like extension of the discharge chute can be implemented in a simple manner using, for example, telescopic rails. Such a drawer-like pull-out option for the discharge chute is also particularly suitable for rough construction site operations because it is stable and functionally reliable in the Handling is. In addition, such an ejection chute, which can be pulled out like a drawer with a linear adjustment device, for example, can be moved easily and quickly between the different positions. In this case, in the area of the telescopic rails, for example, on which the discharge chute is suspended or supported, latching lugs or locking elements that can be pushed over can be arranged, which release the displacement of the discharge chute from the use position to the cleaning position only after overcoming a certain holding force predetermined by the locking elements which in turn also has the effect that the discharge chute cannot wander out of the position of use in an undesired manner. It goes without saying that only a single latching element can of course also be provided; the plural in connection with the locking elements is to be understood here only as a generic term.

Gemäß einer weiteren konkreten Ausgestaltung ist das Arretierelement an der dem Auswurfschacht zugeordneten Unterseite des Verschlusselementes angeordnet, und zwar bevorzugt dergestalt, dass das Arretierelement in der der Verschluss- und/oder Mischstellung entsprechenden Schwenkstellung der auswurfschachtseitigen Ausnehmung zugeordnet ist, die in einem der Auslassöffnung zugewandten oberen Randbereich der Auswurfschachtwand ausgebildet ist, und zudem weiter dergestalt, dass das Arretierelement in der der Auslassstellung entsprechenden Schwenkstellung an dem der Auslassöffnung zugewandten und das erste auswurfschachtseitige Anschlagelement ausbildenden oberen Randbereich der Auswurfschacht anliegt. Ganz besonders bevorzugt ist in Verbindung mit einer derartigen Ausführungsform ein konkreter Aufbau, bei dem die Auslassöffnung und/oder der, die auswurfschachtseitige Ausnehmung und das erste auswurfschachtseitige Anschlagelement ausbildende, obere Randbereich der Auswurfschachtwand eine der kreisförmigen Schwenkbewegung bzw. dem Schwenkradius des Arretierelements bei Verlagerung des Verschlusselementes zwischen der Verschluss- und/oder Mischstellung und der Auslassstellung angepasste und/oder im Wesentlichen entsprechende Krümmung bzw. Radius aufweist. Dadurch wird auf einfache Weise sichergestellt, dass das, vorzugsweise in einem eck- und/oder randseitigen Bereich des Verschlusselementes angeordnete, Arretierelement bei einer Verschwenkung, ausgehend von der die Auslassöffnung vollständig verschließenden Verschluss- und/oder Mischstellung, von dem die auswurfschachtseitige Ausnehmung aufweisenden Bereich des oberen Randbereiches des Auswurfschachtes weg, in Anlage an den sich daran anschließenden und das erste Anschlagelement ausbildenden Bereich des oberen Randbereichs des Auswurfschachtes und/oder in Anlage an den Auslassöffnungsrandbereich gebracht werden kann. Dadurch kann sichergestellt werden, dass im Verlauf der Verschwenkung des Verschlusselementes in eine die Auslassöffnung immer mehr freigebende Auslassstellung eine geführte, gleitende Anlage erfolgt, was wesentlich dazu beiträgt, die Funktionssicherheit insgesamt zu erhöhen.According to a further specific embodiment, the locking element is arranged on the underside of the closure element assigned to the discharge chute, preferably in such a way that the locking element in the pivoted position corresponding to the closed and / or mixed position is assigned to the discharge chute-side recess, which is located in an upper recess facing the outlet opening Edge area of the discharge chute wall is formed, and furthermore such that the locking element rests in the pivot position corresponding to the outlet position on the upper edge area of the discharge chute facing the outlet opening and forming the first discharge chute-side stop element. In connection with such an embodiment, a specific structure is particularly preferred in which the outlet opening and / or the upper edge region of the discharge chute wall forming the discharge chute-side recess and the first discharge chute-side stop element one of the circular pivoting movement or the pivoting radius of the locking element when the Closure element between the closed and / or mixed position and the outlet position has adapted and / or substantially corresponding curvature or radius. This ensures in a simple manner that the locking element, which is preferably arranged in a corner and / or edge-side area of the closure element, is pivoted, starting from the closed and / or mixed position completely closing the outlet opening, from the area having the discharge chute-side recess of the upper edge area of the discharge chute, can be brought into contact with the adjoining area of the upper edge area of the discharge chute that forms the first stop element and / or with the outlet opening edge area. It can thereby be ensured that in the course of the pivoting of the closure element into an outlet position that releases the outlet opening more and more, a guided, sliding abutment takes place, which contributes significantly to increasing the overall functional reliability.

Die der Auslassöffnung zugeordnete Mündungsöffnung des Auswurfschachtes und damit wenigstens ein der Auslassöffnung zugeordneter oberer Randbereich der Auswurfschachtwand und/oder das, vorzugsweise plattenförmige, Verschlusselement weist zudem bevorzugt eine im Wesentlichen der Geometrie der Auslassöffnung entsprechende Geometrie, zum Beispiel eine halbmondartige Geometrie, auf. Dadurch wird ein sicherer Verschluss der Auslassöffnung zu jedem Zeitpunkt gewährleistet.The outlet opening of the discharge chute assigned to the outlet opening and thus at least one upper edge area of the discharge chute wall assigned to the outlet opening and / or the preferably plate-shaped closure element also preferably has a geometry that essentially corresponds to the geometry of the outlet opening, for example a crescent-like geometry. This ensures that the outlet opening is reliably closed at all times.

Das zweite auswurfschachtseitige Anschlagelement ragt von der Außenwand des Auswurfschachtes bevorzugt dergestalt ab, dass das verschlusselementseitige Arretierelement, bei einem sich in der Verschlussund/oder Mischstellung befindlichen Verschlusselement und einem Übergang des Auswurfschachtes von der Gebrauchsposition in die Reinigungsposition, in eine die Verlagerung, vorzugsweise die Verschwenkung des Verschlusselementes blockierende Anlage an wenigstens dem zweiten auswurfschachtseitigen Anschlagelement gelangt. Ein derartig ausgebildetes zweites auswurfschachtseitiges Anschlagelement kann einfachst an der Außenwand des Auswurfschachtes angeordnet werden, vorzugsweise in Form eines plattenartigen und/oder flossenartigen und/oder rippenartigen Bauteils.The second discharge chute-side stop element preferably protrudes from the outer wall of the discharge chute in such a way that the locking element-side locking element, with a closing element in the closed and / or mixed position and a transition of the discharge chute from the use position to the cleaning position, is in a contact blocking the displacement, preferably the pivoting of the closure element, reaches at least the second stop element on the discharge chute. A second discharge chute-side stop element designed in this way can be arranged in the simplest possible manner on the outer wall of the discharge chute, preferably in the form of a plate-like and / or fin-like and / or rib-like component.

Für eine besonders funktionssichere und abstützende Verlagerung des Verschlusselementes ist gemäß einer weiteren besonders bevorzugten Ausgestaltung vorgesehen, dass das Verschlusselement gleitend auf einem die Auslassöffnung wenigstens bereichsweise randseitig begrenzenden Auslassöffnungsrandbereich aufliegt. In Verbindung mit einer derartigen Ausgestaltung kann dann bevorzugt vorgesehen werden, dass der Auslassöffnungsrandbereich dem zweiten auswurfschachtseitigen Anschlagelement beim Übergang des Auswurfschachtes von der Gebrauchsposition in die Reinigungsposition so zugeordnet ist, dass beide Elemente zusammen die Verlagerung, insbesondere das Verschwenken des Arretierelementes besonders funktionssicher blockieren können.For a particularly functionally reliable and supporting displacement of the closure element, it is provided according to a further particularly preferred embodiment that the closure element rests in a sliding manner on an outlet opening edge region that delimits the outlet opening at least in some areas. In connection with such a configuration, it can then preferably be provided that the outlet opening edge area is assigned to the second discharge chute-side stop element when the discharge chute passes from the use position to the cleaning position in such a way that both elements together can block the displacement, in particular the pivoting of the locking element, in a particularly reliable manner.

Die Schwenkachse des bevorzugt verschwenkbaren Verschlusselementes ist vorzugsweise in Hochachsenrichtung ausgerichtet und in einem der bodenwandseitigen Auslassöffnung unmittelbar zugeordneten Bereich einer an die Behälterbodenwand anschließenden, vorzugsweise im Wesentlichen vertikal nach oben abragenden, Behälterseitenwand ausgebildet. Eine derartige Schwenkachsenausrichtung in Verbindung mit einer bodenwandseitigen Auslassöffnung bewirkt eine einfache und funktionssichere Betätigung des Verschlusselementes.The pivot axis of the preferably pivotable closure element is preferably aligned in the vertical axis direction and is formed in an area of a container side wall adjoining the container bottom wall, preferably substantially vertically upward, which is directly associated with the outlet opening on the bottom wall. Such a pivot axis alignment in connection with an outlet opening on the bottom wall results in a simple and functionally reliable actuation of the closure element.

Für die Betätigung des Verschlusselementes und/oder des Auswurfschachtes ist dieses bzw. dieser vorzugsweise mit einem Betätigungselement, zum Beispiel mit einem Handgriff als Betätigungselement, versehen.For the actuation of the closure element and / or the ejection chute, this or this is preferably provided with an actuation element, for example with a handle as an actuation element.

Eine besonders vorteilhafte Schutzfunktion wird auch dann erreicht, wenn im Auswurfschacht, vorzugsweise in einem der Auslassöffnung abgewandten Mündungsbereich des Auswurfschachtes, ein Schutzgitter angeordnet ist. Dieses Schutzgitter ist bezüglich seiner Maschenweite dann bevorzugt so bemessen, dass nicht mit der Hand durchgegriffen werden kann.A particularly advantageous protective function is also achieved when a protective grille is arranged in the discharge chute, preferably in an opening area of the discharge chute facing away from the outlet opening. With regard to its mesh size, this protective grille is then preferably dimensioned in such a way that it cannot be reached with the hand.

In üblicher Weise kann in dem Mischbehälter ein rotierendes und mittels eines an der Mischmaschine, vorzugsweise am Mischbehälter, angeordneten Antriebs antreibbares Mischwerkzeug aufgenommen und angeordnet sein.In the usual way, a rotating mixing tool that can be driven by means of a drive arranged on the mixing machine, preferably on the mixing container, can be received and arranged in the mixing container.

Des Weiteren kann der nach oben offene Mischbehälter mittels eines öffenbaren Deckels, vorzugsweise mittels eines schwenkbar am Mischbehälter angelenkten und mit einem Schutzgitter versehenen öffenbaren Deckels, verschließbar sein. Auch hier kann das Schutzgitter bevorzugt wiederum eine Maschenweite aufweisen, die keinen Durchgriff mit der Hand bzw. gegebenenfalls auch mit einzelnen Fingern von oben her in den Mischbehälter ermöglicht.Furthermore, the upwardly open mixing container can be closed by means of an openable cover, preferably by means of an openable cover which is hinged to the mixing container and provided with a protective grille. Here, too, the protective grille can preferably again have a mesh size that does not allow the hand or, if necessary, individual fingers to reach into the mixing container from above.

Zudem kann der Mischbehälter auch zum Beispiel von einem, vorzugsweise mit Rädern versehenen, Gestell getragen sein.In addition, the mixing container can also be carried, for example, by a frame, preferably provided with wheels.

Die Aufgabe wird bezüglich des Verfahrens ferner gelöst mit den Merkmalen des Anspruchs 16. Die sich hierdurch ergebenden Vorteile sind identisch mit den bereits vorstehend ausführlich gewürdigten Vorteilen der Mischmaschine. Insofern wird, auch bezüglich der optionalen Weiterbildungen, auf die zuvor gemachten Ausführungen verwiesen.The object is also achieved with regard to the method with the features of claim 16. The advantages resulting from this are identical to the advantages of the mixing machine that have already been extensively recognized above. In this respect, reference is made to the statements made above, also with regard to the optional further developments.

Die Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert.The invention is explained in more detail below with reference to a drawing.

Es zeigen:

Fig. 1
schematisch eine perspektivische Darstellung einer erfindungsgemäßen Mischmaschine,
Fig. 2a bis 2c
schematisch eine Draufsicht auf die mittels eines Verschlusselementes verschließbare behälterbodenwandseitige Auslassöffnung in Verbindung mit unterschiedlichen Stellungen des Verschlusselementes bzw. in Verbindung mit unterschiedlichen Positionen des Auswurfschachtes, und
Fig. 3a bis 3c
die den Fig. 2a bis 2c entsprechend zugeordneten Unteransichten auf die behälterbodenwandseitige Auslassöffnung.
Show it:
Fig. 1
schematically a perspective representation of a mixing machine according to the invention,
Figures 2a to 2c
schematically a top view of the outlet opening on the container bottom wall side, which can be closed by means of a closure element, in connection with different positions of the closure element or in connection with different positions of the discharge chute, and
Figures 3a to 3c
the the Figures 2a to 2c correspondingly assigned bottom views of the outlet opening on the container bottom wall.

In der Fig. 1 ist schematisch und perspektivisch eine beispielhafte Ausführungsform einer erfindungsgemäßen Mischmaschine 1 gezeigt, die als Baumischmaschine zum Mischen von Mörteln, Putzen, Estrichen oder Beton dienen kann. Die Mischmaschine 1 weist einen auf einem Gestell 2 gelagerten bzw. abgestützten Mischbehälter 3 auf.In the Fig. 1 is shown schematically and in perspective an exemplary embodiment of a mixer 1 according to the invention, which can serve as a construction mixer for mixing mortar, plaster, screed or concrete. The mixing machine 1 has a mixing container 3 mounted or supported on a frame 2.

Das Gestell 2 weist mehrere voneinander umfangsseitig beabstandete Gestellfüße 4 auf, wobei an den beiden in der Bildebene der Fig. 1 hinteren Gestellfüßen 4 eine Quer- bzw. Radachse 5 mitsamt daran drehbar gelagerten Rädern 6 gehaltert ist.The frame 2 has a plurality of frame feet 4 spaced apart from one another on the circumference, with the two in the plane of the drawing Fig. 1 rear frame feet 4 a transverse or wheel axle 5 together with wheels 6 rotatably mounted thereon is supported.

Der Mischbehälter 3 weist eine zylindrische Seitenwand 8 und eine den Mischbehälter 3 nach unten verschließende Bodenwand 7 auf. An der Unterseite der Bodenwand 7 befindet sich eine Motor- und Getriebeeinheit 9, die ein im Inneren des Mischbehälters 3 aufgenommenes Mischwerkzeug 10 rotierend antreibt. Der nach oben offene Mischbehälter 3 ist mittels eines vorzugsweise schwenkbar an der Seitenwand 8 gelagerten Deckels 11 verschlossen, der mit einem Schutzgitter 12 versehen ist, das eine solche Maschenweite aufweist, dass kein Durchgriff mit einer Hand möglich ist. Zudem ist dieses Schutzgitter 12 so weit oberhalb des Mischwerkzeugs 10 angeordnet, dass selbst bei hindurchgesteckten Fingern keine Gefahr für dieselben durch das rotierende Mischwerkzeug 10 besteht.The mixing container 3 has a cylindrical side wall 8 and a bottom wall 7 which closes the mixing container 3 at the bottom. On the underside of the bottom wall 7 there is a motor and gear unit 9 which drives a mixing tool 10 received in the interior of the mixing container 3 in a rotating manner. The upwardly open mixing container 3 is closed by means of a cover 11 which is preferably pivotably mounted on the side wall 8 and which is provided with a protective grille 12 which has a mesh size such that it is not possible to reach through with one hand. In addition, this protective grille 12 is arranged so far above the mixing tool 10 that there is no danger to the fingers from the rotating mixing tool 10 even if the fingers are pushed through.

An einem in der Bildebene der Fig. 1 hinteren Bereich der Seitenwand 8 ist ein Transporthandgriff 13 angeordnet, mittels dem der gekippte und auf den Rädern 6 stehende Aufbau beim Verfahren einfach gehandhabt werden kann.At one in the image plane of the Fig. 1 A transport handle 13 is arranged in the rear region of the side wall 8, by means of which the tilted structure standing on the wheels 6 can be easily handled during the process.

Des Weiteren ist hier beispielhaft im vorderen Bereich der Bodenwand 7 eine Steuer- bzw. Elektroeinheit 14 angeordnet, die zur Ansteuerung der Motor- und Getriebeeinheit 9 dient.Furthermore, a control or electrical unit 14, which is used to control the motor and gear unit 9, is arranged here, for example, in the front area of the bottom wall 7.

Des Weiteren ist, was insbesondere aus der Zusammenschau der Figuren 2a bis 2c ersichtlich ist, in einem randseitigen Bodenwandbereich eine hier halbkreis- bzw. halbmondförmige Auslassöffnung 15 ausgebildet, die mittels eines, um eine vertikal ausgerichtete Schwenkachse 16 verschwenkbaren, bevorzugt plattenförmigen Verschlusselementes 17, bevorzugt einer Schwenkplatte, verschließbar ist (siehe Fig. 2a). Die Schwenkachse 16 (siehe auch Fig. 1) ist somit in Hochachsenrichtung ausgerichtet und in einem der bodenwandseitigen Auslassöffnung 15 unmittelbar zugeordneten Bereich der dort vertikal nach oben anschließenden Seitenwand 8 ausgebildet.Furthermore, what is particularly evident from the synopsis of the Figures 2a to 2c As can be seen, an outlet opening 15, here semicircular or crescent-shaped, is formed in an edge-side bottom wall area, which can be closed by means of a preferably plate-shaped closure element 17, preferably a swivel plate, which can be swiveled about a vertically aligned swivel axis 16 (see FIG Fig. 2a ). The pivot axis 16 (see also Fig. 1 ) is thus oriented in the direction of the vertical axis and is formed in an area of the side wall 8 that adjoins vertically upwards there directly associated with the outlet opening 15 on the bottom wall.

An dem Verschlusselement 17, das eine der Auslassöffnung 15 entsprechende halbkreisförmige bzw. halbmondförmige Geometrie aufweist, ist ferner ein Handgriff 18 angeordnet, der, wie dies insbesondere aus der Fig. 2a und der Fig. 2c ersichtlich ist, die jeweils das Verschlusselement 17 in einer die Auslassöffnung 15 vollständig abdeckenden Verschluss- und/oder Mischstellung 19 zeigen, hier beispielhaft in einem mittleren Bereich, abgekröpft ist, sodass das mit der Hand zu greifende Griffende 20 in dieser Verschluss- und/oder Mischstellung des Verschlusselementes 17 beabstandet von der Seitenwand 8 des Mischbehälters 3 ist und somit von einer Bedienperson einfach hintergriffen bzw. umgriffen werden kann.On the closure element 17, which has a semicircular or crescent-shaped geometry corresponding to the outlet opening 15, a handle 18 is furthermore arranged, which, as shown in particular from FIG Fig. 2a and the Figure 2c which each show the closure element 17 in a closure and / or mixing position 19 that completely covers the outlet opening 15, here for example in a central area, is bent so that the handle end 20 to be gripped by hand is in this closure and / or The mixing position of the closure element 17 is at a distance from the side wall 8 of the mixing container 3 and can thus be easily grasped from behind or grasped by an operator.

Soll nun zum Beispiel am Ende eines Mischvorgangs das Mischgut aus dem Mischbehälter 3 ausgebracht werden, kann eine Bedienperson das Verschlusselement 17 mittels des Handgriffs 18 aus der in der Fig. 2a gezeigten Verschluss- und/oder Mischstellung 19 in die in der Fig. 2b gezeigte Auslassstellung 21 verschwenken, in der die Auslassöffnung 15 wenigstens bereichsweise freigegeben ist. Das Mischgut kann dann über die Auslassöffnung 15 aus dem Mischbehälter 3 ausströmen bzw. ausgebracht werden.If, for example, at the end of a mixing process, the material to be mixed is to be discharged from the mixing container 3, an operator can remove the closure element 17 by means of the handle 18 from the Fig. 2a Closure and / or mixing position 19 shown in the Figure 2b Pivot shown outlet position 21, in which the outlet opening 15 is at least partially released. The mixed material can then flow out of the mixing container 3 or be discharged via the outlet opening 15.

Wie dies insbesondere aus der die jeweiligen Unteransichten zu den Fig. 2a bis 2c zeigenden Fig. 3a bis 3b sehr gut ersichtlich ist, schließt sich an die Auslassöffnung 15 nach unten, von der Bodenwand 7 weg im Wesentlichen unmittelbar ein hier lediglich beispielhaft kasten- bzw. röhrenförmiger Auswurfschacht 22 an, der wenigstens im Bereich seiner der Auslassöffnung 15 zugeordneten Mündungsöffnung, hier beispielhaft insgesamt, eine der Auslassöffnung 15 entsprechende und damit hier beispielhafte Halbkreis- bzw. Halbmondquerschnittsgeometrie aufweist.As in particular from the respective sub-views to the Figures 2a to 2c pointing Figures 3a to 3b As can be seen very clearly, the outlet opening 15 adjoins the outlet opening 15 downwards, away from the bottom wall 7, essentially immediately an ejection chute 22, here merely exemplary in the form of a box or tube, which at least in the area of its mouth opening assigned to the outlet opening 15, here as a whole as an example, has a semicircular or crescent cross-sectional geometry that corresponds to the outlet opening 15 and is therefore exemplary here.

Dieser Auswurfschacht 22 verlängert somit die Auslassöffnung 15 in der, in den Fig. 2b und Fig. 3b gezeigten Auslassstellung 21 des Verschlusselementes 17 dergestalt nach unten, dass das aus dem Mischbehälter 3 ausströmende bzw. ausgebrachte Mischgut über die Auslassöffnung 15 in den Auswurfschacht 22 und von dort zum Beispiel in ein unter die untere Mündungsöffnung des Auswurfschachtes 22 gestelltes Behältnis eingebracht werden kann.This discharge chute 22 thus extends the outlet opening 15 in the, in the Figure 2b and Figure 3b outlet position 21 of the closure element 17 shown downwards in such a way that the mixed material flowing or discharged from the mixing container 3 can be introduced via the outlet opening 15 into the discharge chute 22 and from there, for example, into a container placed under the lower mouth opening of the discharge chute 22.

Wie dies weiter aus den Fig. 3a bis 3c entnommen werden kann, ist im Bereich der unteren Mündungsöffnung des Auswurfschachtes ein Schutzgitter 23 angeordnet, dessen Maschenweite hier ebenfalls wiederum so gewählt ist, dass ein Durchgriff mit der Hand zu der Auslassöffnung 15 in der Bodenwand 7 und damit in das Innere des Mischbehälters 3 hinein unterbunden ist.How this continues from the Figures 3a to 3c can be removed, a protective grille 23 is arranged in the area of the lower mouth opening of the discharge chute, the mesh size of which is again selected here so that reaching with the hand to the outlet opening 15 in the bottom wall 7 and thus into the interior of the mixing container 3 is prevented is.

Ein derartiges Schutzgitter 23 ist insbesondere dann von Vorteil, wenn der Auswurfschacht 22, wie lediglich beispielhaft in der Fig. 1 dargestellt, eine relativ kurze Baulänge aufweist, sodass gegebenenfalls die Gefahr besteht, dass von unten mit der Hand durch den Auswurfschacht 22 hindurch in den Bereich der Auslassöffnung 15 hineingegriffen werden könnte. Alternativ könnte der Auswurfschacht jedoch auch eine solche Länge aufweisen und/oder so dimensioniert sein, dass ein derartiger Eingriff von unten durch den Auswurfschacht 22 hindurch zur Auslassöffnung 15 und von dort aus in den Mischbehälter 3 hinein nicht möglich ist.Such a protective grille 23 is particularly advantageous when the discharge chute 22, as only exemplified in FIG Fig. 1 shown, has a relatively short overall length, so that there is possibly the risk that the hand could reach into the area of the outlet opening 15 from below through the discharge chute 22. Alternatively, however, the discharge chute could also have such a length and / or be dimensioned such that such an engagement from below through the discharge chute 22 to the outlet opening 15 and from there into the mixing container 3 is not possible.

Wie dies weiter aus den Fig. 3a bis 3b ersichtlich ist, ist der Auswurfschacht hier mittels einer Linearverstelleinrichtung, zum Beispiel einer hier lediglich beispielhaft durch zwei Teleskopschienen 24 gebildeten Linearverstelleinrichtung, in der Art eines Schubladens verlagerbar an der Unterseite der Bodenwand 7 aufgehängt bzw. gehaltert, sodass der Auswurfschacht 22 mittels dieser hier beispielhaft durch die Teleskopschienen 24 gebildeten Linearverstelleinrichtung von seiner in den Fig. 3a und 3b gezeigten Gebrauchsposition 25 und damit von der Auslassöffnung 15 weg in die in der Fig. 3c gezeigte Reinigungsposition 26 verlagert bzw. ausgezogen werden kann.How this continues from the Figures 3a to 3b As can be seen, the discharge chute is suspended or held displaceably on the underside of the bottom wall 7 in the manner of a drawer by means of a linear adjustment device, for example a linear adjustment device formed here merely by way of example by two telescopic rails 24, so that the discharge chute 22 by means of this here by way of example the telescopic rails 24 formed linear adjustment of its in the Figures 3a and 3b Use position 25 shown and thus away from the outlet opening 15 into the position shown in FIG Figure 3c shown cleaning position 26 can be moved or pulled out.

Um zu verhindern, dass der Auswurfschacht 22 bei dem sich in der Auslassstellung 21 befindlichen Verschlusselement 17 (Fig. 3b) in die Reinigungsposition 26 überführt bzw. ausgezogen werden kann sowie um zu vermeiden, dass das Verschlusselement 17 in der in der Fig. 3c gezeigten Reinigungsposition 26 des Verschlusselementes 17 von der dort gezeigten Verschluss- und/oder Mischstellung 19 in die Auslassstellung 21 überführt werden kann, ist eine Sicherheitseinrichtung vorgesehen, die neben dem Auswurfschacht 22 weiter unter anderem auch noch ein hier beispielhaft und bevorzugt als Arretierbolzen ausgebildetes Arretierelement 27 an einer dem Auswurfschacht 22 zugeordneten Unterseite des plattenartigen Verschlusselementes 17 aufweist. Dieses Arretierelement 27 ragt hier beispielhaft erhaben von der Unterseite 28 des Verschlusselementes 17 ab und ist dort in einem eck- und randseitigen Bereich, insbesondere in einem eck- und randseitigen Übergangsbereich zwischen den beiden langen Seiten des Verschlusselementes 17, angeordnet.In order to prevent the discharge chute 22 from being damaged when the closure element 17 is in the outlet position 21 ( Figure 3b ) can be transferred or pulled out into the cleaning position 26 and to avoid that the closure element 17 is in the in the Figure 3c The shown cleaning position 26 of the closure element 17 can be transferred from the closure and / or mixing position 19 shown there into the outlet position 21, a safety device is provided which, in addition to the discharge chute 22, also includes, among other things, a locking element 27, which is designed here as an example and preferably as a locking bolt on an underside of the plate-like closure element 17 assigned to the discharge chute 22. This locking element 27 protrudes from the underside 28 of the closure element 17 and is arranged there in a corner and edge area, in particular in a corner and edge transition area between the two long sides of the closure element 17.

In der in der Fig. 3a gezeigten Verschluss- und/oder Mischstellung 19 des Verschlusselements 17 ist das Arretierelement 27 einer, in einem oberen Randbereich 32 der Auswurfschachtwand ausgebildeten auswurfschachtseitigen Ausnehmung 29 zugeordnet, durch die das Arretierelement 27 bei einer Verlagerung des Auswurfschachtes 22 von der in der Fig. 3a gezeigten Gebrauchsposition 25 in die in der Fig. 3c gezeigte Reinigungsposition 26 (und zurück) ungehindert hindurchführbar ist.In the in the Fig. 3a The locking and / or mixed position 19 of the locking element 17 shown, the locking element 27 is assigned to an ejection chute-side recess 29 formed in an upper edge region 32 of the ejection chute wall, through which the locking element 27 when the ejection chute 22 is displaced from the one shown in FIG Fig. 3a Use position 25 shown in the Figure 3c shown cleaning position 26 (and back) can be passed through unhindered.

Um zu vermeiden, dass in der in der Fig. 3c gezeigten Reinigungsposition 26 des Auswurfschachtes 22 das Verschlusselement 17 von der dort gezeigten Verschluss- und/oder Mischstellung 19 in die Auslassstellung 21 überführt werden kann, ragt von der Außenwand des Auswurfschachtes weiter ein hier lediglich beispielhaft plattenartiges bzw. rippenartiges Anschlagelement 30 weg. Diesem Anschlagelement 30 ist das Arretierelement 27 in der Verschlus-und/oder Mischstellung 19 des Verschlusselementes 17 so zugeordnet, dass das Anschlagelement 30 ein Verschwenken des Verschlusselementes 17 um die Schwenkachse 16 in die Auslassstellung 21 blockiert bzw. verhindert.To avoid being in the in the Figure 3c shown cleaning position 26 of the discharge chute 22, the closure element 17 can be transferred from the closed and / or mixed position 19 shown there into the outlet position 21, a plate-like or rib-like stop element 30 protrudes further away from the outer wall of the discharge chute. The locking element 27 in the closed and / or mixed position 19 of the closure element 17 is assigned to this stop element 30 in such a way that the stop element 30 blocks or prevents pivoting of the closure element 17 about the pivot axis 16 into the outlet position 21.

Wie in der Fig. 3c lediglich beispielhaft dargestellt, liegt das Verschlusselement 17 beispielsweise gleitend auf einem die Auslassöffnung 15 randseitig begrenzenden Auslassöffnungsrandbereich 31 auf, der zudem hier wiederum lediglich optional bzw. beispielhaft gegebenenfalls auch so mit dem Anschlagelement 30 zusammenwirken kann, dass beide Elemente zusammen die Verlagerung des Arretierelementes 27 und damit das Verschwenken des Verschlusselementes 17 blockieren bzw. verhindern.Like in the Figure 3c Shown merely by way of example, the closure element 17 rests, for example, in a sliding manner on an outlet opening edge region 31 which delimits the outlet opening 15 at the edge and which here in turn can only optionally or, for example, also interact with the stop element 30 in such a way that both elements together facilitate the displacement of the locking element 27 and thus block or prevent the pivoting of the closure element 17.

Wie dies weiter insbesondere aus der Fig. 3b ersichtlich ist, blockiert dieses an der Außenwand des Auswurfschachtes 22 abragende Anschlagelement 30 in der eingeschobenen Gebrauchsposition 25 des Auswurfschachtes 22, in der sich der Auswurfschacht 22 an die Auslassöffnung 15 anschließt, das Arretierelement 27 nicht mehr, sodass dieses Arretierelement 27 bei einem Verschwenken des Verschlusselementes 17 um die Schwenkachse 16 von dem der Ausnehmung 29 zugeordneten ersten eck- bzw. randseitigen Bereich 33 des Auswurfschachtes 22, hier beispielhaft um etwa 180°, entlang des Auslassöffnungsrandbereichs 31 bzw. entlang des oberen Randbereichs 32 der Auswurfschachtwand (und damit auch weg von der auswurfschachtseitigen Ausnehmung 29) in den in der Fig. 3c gezeigten gegenüberliegenden zweiten eck- bzw. randseitigen Bereich 34 des Auswurfschachtes 22 verlagert wird.As this continues in particular from the Figure 3b As can be seen, this stop element 30 protruding from the outer wall of the ejection chute 22 no longer blocks the locking element 27 in the inserted use position 25 of the ejection chute 22, in which the ejection chute 22 adjoins the outlet opening 15, so that this locking element 27 is no longer blocked when the closure element is pivoted 17 around the pivot axis 16 from the first corner or edge-side area 33 of the discharge chute 22 assigned to the recess 29, here by way of example by about 180 °, along the outlet opening edge area 31 or along the upper edge area 32 of the discharge chute wall (and thus also away from the discharge chute-side recess 29) in the Figure 3c shown opposite second corner or edge-side area 34 of the discharge chute 22 is displaced.

Hier liegt das Arretierelement 27 dann unmittelbar am oberen Randbereich 32 der Auswurfschachtwand an, sodass das Arretierelement 27 das Herausziehen des Auswurfschachtes 22 blockiert. Auch dadurch ist sichergestellt, dass durch die fehlende Wegverlagerungsmöglichkeit des Auswurfschachtes 22 als Bestandteil der Sicherheitseinrichtung von der Auslassöffnung 15 kein Eingriff über die Auslassöffnung 15 in den Mischbehälter 3 hinein erfolgen kann. Wie weiter aus den figürlichen Darstelllungen sehr gut ersichtlich ist, ist der Schwenkradius des Arretierelementes 27 und damit auch der Krümmungsverlauf des oberen Randbereichs 32 des Auswurfschachtes 22 hier somit durch den Abstand des Arretierelementes 27 von der Schwenkachse 16 vorgegeben.Here, the locking element 27 then rests directly on the upper edge region 32 of the discharge chute wall, so that the locking element 27 blocks the pulling out of the discharge chute 22. This also ensures that, due to the lack of the possibility of displacement of the discharge chute 22 as a component of the safety device from the outlet opening 15, no access can take place via the outlet opening 15 into the mixing container 3. As can also be seen very clearly from the figurative representations, the pivoting radius of the locking element 27 and thus also the curvature of the upper edge region 32 of the discharge chute 22 is hereby given by the distance between the locking element 27 and the pivot axis 16.

Erst wenn das Verschlusselement 17 wieder in die in der Fig. 3a gezeigte Verschluss- und/oder Mischstellung 19 (zurück) verlagert worden ist, in der das Arretierelement 27 der Ausnehmung 29 des Auswurfschachtes 22 zugeordnet ist, kann der Auswurfschacht 22 ausgezogen werden. In diesem Fall ist aber dann, wie zuvor dargestellt, das Verschwenken des Verschlusselementes 17 durch das Zusammenwirken des Arretierelementes 27 mit dem Anschlagelement 30 bzw. dem Auslassöffnungsrandbereich 31 blockiert.Only when the closure element 17 is back in the Fig. 3a The shown closed and / or mixed position 19 has been moved (back), in which the locking element 27 is assigned to the recess 29 of the discharge chute 22, the discharge chute 22 can be pulled out. In this case, however, as shown above, the pivoting of the closure element 17 is blocked by the interaction of the locking element 27 with the stop element 30 or the outlet opening edge region 31.

Claims (16)

  1. Mixing machine (1) for the mixing of mixing material, having a mixing container (3) in which a mixing tool is or can be arranged, wherein the mixing container (3) has, in a container wall, at least one outlet opening (15) which can be closed by means of at least one closure element (17), and wherein the at least one closure element (17) is displaceable between a closure and/or mixing position (19), in which it closes the at least one outlet opening (15), and an outlet position (21), in which it frees the at least one outlet opening (15), wherein a safety device is provided which has, or is formed by, a discharge chute (22) which is assigned to the outlet opening (15) and is displaceable between different positions, wherein the discharge chute (22) adjoins the outlet opening (15) in its use position such that, with the closure element (17) in the outlet position (21), the mixing material can be discharged from the mixing container (3) via the outlet opening (15) and introduced into the discharge chute (22), characterized in that a securing device is provided which blocks a displacement of the closure element (17) from the closure and/or mixing position (19) into the outlet position (21) if the discharge chute (22) is not in a position in which it shields the outlet opening (15) for access into the mixing container (3) through the at least one outlet opening (15).
  2. Mixing machine according to Claim 1, characterized in that the discharge chute (22) has such a length and/or is dimensioned and/or equipped in such a way that, with a closure element (17) displaced into the outlet position (21), no access into the mixing container (3) through the discharge chute (22) or through the at least one outlet opening (15) is possible.
  3. Mixing machine according to Claim 1 or 2, characterized in that the securing device further has at least one securing element, or the securing device is assigned at least one securing element, by means of which, with a closure element (17) in the outlet position (21), the displacement of the safety device into the position in which it does not shield the outlet opening (15), preferably the displacement of the discharge chute (22) from the use position (25) into the cleaning position (26), can be blocked, and by means of which, with a closure element (17) in the closure and/or mixing position (19), the displacement of the safety device into the position in which it does not shield the outlet opening (15), preferably the displacement of the discharge chute (22) between the use and the cleaning position, can be enabled and/or the displacement of the closure element (17) into the outlet position (21) can be blocked.
  4. Mixing machine according to Claim 3, characterized in that the securing device has a plurality of safety elements which are formed on and/or assigned to the discharge chute (22) and the closure element (17) and can be brought into different operative connections with one another in the different positions of the closure element (17) and/or in the different positions of the discharge chute (22).
  5. Mixing machine according to Claim 3 or 4, characterized
    in that a closure element-side safety element is provided which interacts with a first discharge chute-side safety element in the outlet position (21) of the closure element (17) in such a way that a displacement of the discharge chute (22) is blocked,
    in that the closure element-side safety element interacts with a second discharge chute-side safety element in the closure and/or mixing position (19) of the closure element (17) in such a way that a displacement of the discharge chute (22) is enabled, and
    in that the closure element-side safety element interacts with a third discharge chute-side safety element in the closure and/or mixing position (19) of the closure element (17) in such a way that a displacement of the closure element (17) is blocked.
  6. Mixing machine according to Claim 5, characterized
    in that the closure element-side safety element is formed by a projecting arresting element (27) formed on the closure element (17), preferably by an arresting bolt protruding from the closure element,
    in that the first discharge chute-side safety element is formed by a first discharge chute-side stop element against which the arresting element (27) bears in the outlet position (21) of the closure element (17) in such a way that a displacement of the discharge chute (22) between its use and cleaning position is blocked,
    in that the second discharge chute-side safety element is formed by a discharge chute-side cutout (29) through which the arresting element (27) can be guided unimpeded during a displacement of the discharge chute (22) between the use and the cleaning position and with a closure element (17) in the closure and/or mixing position (19), and
    in that the third discharge chute-side safety element is formed by a second discharge chute-side stop element (30) against which the arresting element (27) bears in the closure and/or mixing position (19) of the closure element (17) in such a way that a displacement of the closure element (17) in its outlet position (21) is blocked.
  7. Mixing machine according to one of the preceding claims, characterized in that the closure element (17), which is preferably formed by a closure plate, is mounted in the region of the outlet opening (15), which is preferably formed on the edge side in the bottom wall (7) of the mixing container (3), so as to be pivotable about a pivot axis (16), and/or in that the discharge chute (22), which preferably has a box-shaped and/or tubular design, is mounted in the region of the outlet opening (15), which is preferably formed on the edge side in the bottom wall (7) of the mixing container (3), such that it can be pulled out in the manner of a drawer, preferably by means of a linear adjustment device.
  8. Mixing machine according to Claims 6 and 7, characterized in that the arresting element (27) is arranged on the underside (28), which is assigned to the discharge chute (22), of the closure element (17) in such a way that, in the pivoting position corresponding to the closure and/or mixing position (19), the arresting element (27) is assigned to the discharge chute-side cutout (29), which is formed in an upper edge region (32), which faces the outlet opening (15), of the discharge chute wall, and in that, in the pivoting position corresponding to the outlet position (21), the arresting element (27) bears against the upper edge region (32) of the discharge chute wall, said upper edge region facing the outlet opening (15) and forming the first discharge chute-side stop element.
  9. Mixing machine according to Claim 8, characterized in that the outlet opening (15) and/or the upper edge region (32) of the discharge chute wall, said upper edge region forming the discharge chute-side cutout (29) and the first discharge chute-side stop element, has a curvature or radius adapted to, and/or substantially corresponding to, the pivoting movement or the pivoting radius of the arresting element (27) during displacement of the closure element (17) between the closure and/or mixing position (19) and the outlet position (21), preferably in such a way that, during a pivoting movement, starting from the closure and/or mixing position (19) completely closing the outlet opening (15), away from the region, which has the discharge chute-side cutout (29), of the upper edge region (32) of the discharge chute, the arresting element (27), which is preferably arranged in a corner-side and/or edge-side region of the closure element (17), comes into contact with the adjoining region, which forms the first stop element, of the upper edge region (32) of the discharge chute and/or into contact with the outlet opening edge region (31), preferably sliding along there in a sliding contact connection, in the course of the pivoting movement of the closure element (17), into an outlet position (21) increasingly freeing the outlet opening (15).
  10. Mixing machine according to one of the preceding claims, characterized in that the mouth opening, which is assigned to the outlet opening (15), of the discharge chute (22) and hence at least one upper edge region (32) of the discharge chute wall that is assigned to the outlet opening (15) and/or the, preferably plate-shaped, closure element (17) have or has a geometry substantially corresponding to the geometry of the outlet opening (15), preferably a semicircular and/or half-moon-like geometry.
  11. Mixing machine according to one of Claims 5 to 10, characterized in that the second discharge chute-side stop element (30) projects from the outer wall of the discharge chute (22), preferably in the manner of a plate and/or fin and/or rib, in such a way that the closure element-side arresting element (27), with a closure element (17) in the closure and/or mixing position (19) and during a transfer of the discharge chute (22) from the use position (25) into the cleaning position (26), comes into contact with at least the second discharge chute-side stop element (30), with the contact blocking the displacement, preferably the pivoting movement, of the closure element (17).
  12. Mixing machine according to one of the preceding claims, characterized in that the closure element (17) bears slidingly on an outlet opening edge region (31) which marginally delimits the outlet opening (15) at least in certain regions.
  13. Mixing machine according to Claim 11 and Claim 12, characterized in that, during the transfer of the discharge chute (22) from the use position (25) into the cleaning position (26), the outlet opening edge region (31) is assigned to the second discharge chute-side stop element (30) in such a way that both elements together block the displacement, in particular the pivoting movement, of the arresting element (27).
  14. Mixing machine according to one of Claims 7 to 13, characterized in that the pivot axis (16) of the closure element (17) is oriented in the vertical axis direction and is formed in a region, which is directly assigned to the bottom wall-side outlet opening (15), of a container side wall (8) which adjoins the container bottom wall (7) and preferably projects substantially vertically upwards.
  15. Mixing machine according to one of the preceding claims, characterized in that a protective grating (23) is arranged in the discharge chute (22), preferably in a mouth region of the discharge chute (22) that faces away from the outlet opening (15).
  16. Method for operating or actuating a mixing machine (1) for the mixing of mixing material, having a mixing container (3) in which a mixing tool is or can be arranged, wherein the mixing container (3) has, in a container wall, at least one outlet opening (15) which can be closed by means of at least one closure element (17), and wherein the at least one closure element (17) is displaceable between a closure and/or mixing position (19), in which it closes the at least one outlet opening (15), and an outlet position (21), in which it frees the at least one outlet opening (15), wherein a safety device is provided which has, or is formed by, a discharge chute (22) which is assigned to the outlet opening (15) and is displaceable between different positions, wherein the discharge chute (22) adjoins the outlet opening (15) in its use position such that, with the closure element (17) in the outlet position (21), the mixing material can be discharged from the mixing container (3) via the outlet opening (15) and introduced into the discharge chute (22), characterized in that a securing device is provided which blocks a displacement of the closure element (17) from the closure and/or mixing position (19) into the outlet position (21) if the discharge chute (22) is not in a position in which it shields the outlet opening (15) for access into the mixing container (3) through the at least one outlet opening (15).
EP15002282.0A 2015-07-31 2015-07-31 Mixing machine, in particular construction mixing machine for mixing mixing material, in particular for mixing mortars, plasters, screeds or concrete and process using such machine Active EP3124194B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK15002282.0T DK3124194T3 (en) 2015-07-31 2015-07-31 Mixer, in particular construction mixer, for mixing mortars, plaster, cement or concrete, and method of operating such a mixer
EP15002282.0A EP3124194B1 (en) 2015-07-31 2015-07-31 Mixing machine, in particular construction mixing machine for mixing mixing material, in particular for mixing mortars, plasters, screeds or concrete and process using such machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15002282.0A EP3124194B1 (en) 2015-07-31 2015-07-31 Mixing machine, in particular construction mixing machine for mixing mixing material, in particular for mixing mortars, plasters, screeds or concrete and process using such machine

Publications (2)

Publication Number Publication Date
EP3124194A1 EP3124194A1 (en) 2017-02-01
EP3124194B1 true EP3124194B1 (en) 2021-05-05

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EP15002282.0A Active EP3124194B1 (en) 2015-07-31 2015-07-31 Mixing machine, in particular construction mixing machine for mixing mixing material, in particular for mixing mortars, plasters, screeds or concrete and process using such machine

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DK (1) DK3124194T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107233841B (en) * 2017-06-16 2023-09-05 江苏正昌粮机股份有限公司 Door opening mechanism of mixer
DE102018106192A1 (en) 2018-03-16 2019-09-19 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Mixing device with two-part cap
DE202018005417U1 (en) 2018-11-23 2018-12-10 Collomix Gmbh Discharge chute for mixing machines, in particular for construction machines, for mixing mixes such as mortars, plasters, screeds or concrete

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1280116B (en) * 1965-04-23 1968-10-10 Schmid Kg Leonhard Pan mixer for building materials
IT1269092B (en) * 1994-04-14 1997-03-21 Imer Int Spa PERFECTED BLADES MIXER, ESPECIALLY FOR BUILDING
DE102004014326A1 (en) 2004-03-22 2005-10-06 Bms Bau-Maschinen-Service Ag Mixing machine for mixing mortar, flooring material or concrete comprises a securing unit to secure the filling opening of a mixing vessel
EP2673581B1 (en) * 2011-10-14 2015-09-23 Telme S.P.A. Multipurpose professional kitchen machine, in particular for gastronomy/catering processes, but also for confectionary, ice-cream making and chocolate making processes

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DK3124194T3 (en) 2021-07-26
EP3124194A1 (en) 2017-02-01

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