Abstract:
A modular article dispensing unit for an automatic vending machine includes an article compartment for accommodating articles with a rotatably mounted rotary body at the dispensing opening of the article compartment for the removal and discharge of individual articles from the article compartment. The rotary body has at least one recess which in a removal position is filled with an article from the article compartment and delivers the article after a predetermined rotary movement in a dispensing position. Arranged in the interior of the article compartment is at least one motion member which is set in motion prior to and/or during each rotary movement of the rotary body.

Description:
The invention concerns a modular article dispensing unit for an automatic vending machine, with an article compartment for accommodating articles, with a rotatably mounted rotary body at the dispensing opening of the article compartment for removing and dispensing individual articles from the article compartment, wherein the rotary body has at least one recess, in a removal position removes an article from the article compartment and after a predetermined rotary movement in a dispensing position delivers the article. 
     BACKGROUND OF THE ART 
     An article dispensing unit of that kind is known for example from DE 21 39 955 A1, in which articles are fed separately from an article compartment to a rotary body and are delivered after a predetermined rotary movement into a dispensing position. Disposed in front of the rotary body is a separating section which leads out of the article compartment and which feeds the articles separately and in isolation successively to the rotary body at the end of the separating section. The preceding operation of separating the articles into separate items means that the article dispensing unit is of a relatively large structural volume. Direct removal of the article from the article compartment is not possible. 
     DE 154 711 also discloses a modular article dispensing unit in which articles are removed from the article compartment directly by the rotary body, wherein after a predetermined rotary movement a part of the article is pushed sideways out of the article wrapping or article packaging and the article wrapping is then discharged into a collecting container, after a further rotary movement of the rotary body. Arranged in the interior of the article component above the rotary body is a fixed deflection projection which is intended to ensure that the articles pass separately to the periphery of the rotary body. For that purpose, the deflection projection is intended to prevent a plurality of mutually superposed articles blocking the recess in the rotary body and impeding entry of individual articles into the recesses in the rotary body. It has been found however that in the region of the fixed deflection projection the articles form so-called bridges and therefore become wedged tight against each other and thereby prevent the flow of articles to the rotary body. 
     SUMMARY OF THE INVENTION 
     Therefore the object of the invention is to develop a modular dispensing unit of the kind set forth in the opening part of this specification, in such a way that the formation of bridges of articles upstream of the rotary body is reliably prevented, and therefore the feed flow of the articles to the recess or recesses in the rotary body is always reliably guaranteed. 
     That object is attained by a modular article dispensing unit for an automatic vending machine, with an article compartment for accommodating articles, with a rotatably mounted rotary body at the dispensing opening of the article compartment for removing and dispensing individual articles from the article compartment, wherein the rotary body has at least one recess, in a removal position removes an article from the article compartment and after a predetermined rotary movement in a dispensing position delivers the article characterized by at least one motion member in the interior of the article compartment, which is set in motion prior to and/or during each rotary movement of the rotary body. 
     The advantages of the invention are in particular that the motion member in the interior of the article compartment is set in motion prior to and/or during each rotary movement of the rotary body, whereby the articles are also moved in the region of the motion member. That makes it possible to prevent the articles from becoming wedged or jammed, that is to say it prevents them from forming bridges, while the action of the motion member on the articles is particularly advantageous in the region in which the articles are intended individually to pass into the recess in the rotary body. 
     In a particularly preferred feature the motion member or members is or are driven in operative relationship with the rotary body and is or are set in motion directly or indirectly by the rotary body. Preferably the motion member is supported pivotably about an axis which extends parallel to the axis of the rotary body. The motion member is preferably arranged in the interior of the article compartment in such a way that it is in direct mechanical contact with the rotary body and upon rotation of the rotary body performs a pivotal movement which has the result that articles disposed above the motion member are lifted, thereby reliably eliminating the onset of article bridge formation. 
     In accordance with a preferred embodiment of the invention the motion member has an upper engagement portion which is directed towards the articles in the article compartment and a lower engagement portion which upon rotation of the rotary member during predetermined time intervals comes into engagement with the rotary member. In that case the motion member is for example in the form of a segment of a wedge or circular surface, which is mounted pivotably in the region of its tip. Alternatively, the motion member may be in the form of a doublearmed angle lever whose upper arm forms the upper engagement portion and whose lower arm forms the lower engagement portion which is deflected by the rotary body, wherein the lower arm and the upper arm extend at an angle which is preferably &lt;180°, preferably even less than 90°. 
     It is possible to provide on the rotary body control projections or cams which in the rotary movement of the rotary body come into engagement with the motion member and deflect the motion member prior to or during each rotary movement of the rotary body and in that way lift the articles disposed thereabove in order to prevent the articles from forming bridges. 
     In accordance with a preferred embodiment of the invention there is provided a first electrical drive device for driving the rotary body. The first electrical drive device can also be used for driving the motion member which then for example is displaced with a pivotal movement by way of a transmission and an additional control means during suitable periods of time of the overall rotary movement of the rotary body. Alternatively, it is also possible to provide a second electrical drive which only drives the motion members synchronously with the rotary body. 
     Preferably a plurality of recesses are provided at the periphery of the rotary body so that to remove and dispense an article only a predetermined rotary angle which is less than or equal to 180° has to be covered. The rotary body is for example in the form of a rotationally symmetrical cylinder in which the recesses are grooves which extend parallel to the axis of rotation and which extend over the entire width of the rotary body. The recesses are preferably matched to the shape of the articles which are to be dispensed in the article dispensing unit. If for example the articles are in the form of drinks cans, then the recesses are of a circular cross-section which is suitably open at the periphery of the rotary body. 
     The article compartment has two spaced parallel side walls, a rear wall, a front wall and a bottom. The bottom preferably extends inclinedly downwardly and forwardly and the dispensing opening of the article compartment is preferably in the corner region between the bottom and the front wall. 
     Preferably the rotary body is arranged in the dispensing opening in such a position that the articles run or roll down directly into a recess under their own weight on the inclined bottom of the article compartment, when the rotary body is at a stop. In a preferred embodiment of the invention, the motion member can then also be moved mechanically in synchronous relationship with the movement which then occurs, of the rotary body. 
     The rotary body forms between the recesses so-called lobes or vanes which are spaced uniformly in the peripheral direction and directed radially outwardly and which with their free end represent part of the cylindrical peripheral contour of the rotary body. When the rotary body rotates in the clockwise direction, a respective vane passes from below into the interior of the article compartment and a respective vane passes forwardly out of the article compartment. For example there are three recesses in the rotary body, which are each separated from each other by a respective vane. For the purposes of separating and discharging the article, the rotary body is rotated stepwise through 180° in each case. During the rotary movement of the rotary body the next article in the article compartment rolls into the next recess and is picked up by the rotary body and entrained into a viewing position of being readily visible from the front. In a second rotary movement through 120° the vane further entrains that article and then discharges that article into a dispensing compartment in the dispensing position. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     Advantageous developments of the invention are characterized by the features of the appendant claims. An embodiment of the invention is described in greater detail here in after with reference to the drawing in which: 
     FIG. 1 is a perspective view of an article dispensing unit for drinks cans, 
     FIG. 2 is a view in section of the article dispensing unit shown in FIG. 1, 
     FIG. 3 is a side view on an enlarged scale of the dispensing mechanism of the article dispensing unit shown in FIG. 1 or FIG. 2 upon removal and dispensing of an article, wherein the articles in a bridge configuration block access to the dispensing mechanism, and is 
     FIG. 4 is a view corresponding to FIG. 3, illustrating elimination of the article bridge configuration. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The article dispensing unit shown in FIGS. 1 and 2 has an article compartment  1  which is provided for accommodating drinks cans  4  or beverage containers. The width of the article compartment  1  approximately corresponds to the length of the drinks can  4 . The drinks cans  4  can be disposed in the article compartment  1  horizontally with their longitudinal axis at a right angle to the side walls  12  of the article compartment  1  or the intermediate walls  2 . The depth of the article compartment  1  between the front wall  3  and the rear wall  13  is such that a plurality of drinks cans  4  can be disposed one behind the other. The height of the article compartment  1  is such that a plurality of layers of drinks cans  4  can be arranged in mutually superposed relationship. In that respect precise positioning of each drinks can  4  in the article compartment  1  is not an important consideration. 
     The front wall  3  of the article compartment  1  is transparent so that it is possible to see into the article compartment  1  from the front. A dispensing opening  15  is provided in each shaft section  11  of the article compartment  1  in the portion where the front wall  3  or front plate and the bottom  14  of the article compartment  1  come together. The bottom  14  of the article compartment  1  is arranged in the form of an inclined plane in the article compartment  1  in such a way that the inclined plane slopes with a fall in the direction of the dispensing opening  15  or the front wall  3  of the article compartment  1 . 
     A rotary body  6  of a substantially cylindrical shape is supported horizontally rotatably about an axis  7  in the dispensing opening  15 , as a separating and dispensing means. In the illustrated embodiment each rotary body  6  of a shaft section  11  has in the peripheral direction three recesses  16  which are spaced uniformly from each other, more specifically through an angle of 1200. The recesses  16  are in the form of grooves which extend parallel to the axis  7  so that a drinks can  4  can be supported therein, with its longitudinal axis parallel to the axis of rotation  7  of the rotary body  6 . The shape of the recesses  16  corresponds to the shape of the article. Provided between the recesses  16  are the lobes or vanes  17  of the rotary body  6 , the free ends of which form a part of the cylindrical peripheral contour of the rotary body  6 . 
     The rotary body  6  associated with a respective shaft section  11  of the article compartment  1  is provided with a drive device  60  which includes a geared motor  62  which for example by way of a toothed belt drives the rotary body  6  stepwise in the clockwise direction so that the vanes  17  pass in the clockwise direction from below into the article compartment  1  through the dispensing opening  15 , receive an article and together with the article issue from the article compartment  1  through the dispensing opening  15  in the front wall  3 . 
     The drive device is controlled in such a way that a peripheral portion of the rotary body  6  successively passes through a removal position, a holding position and a dispensing position when the rotary body  6  is rotated, as is described in greater detail hereinafter. Alternatively a plurality of holding positions are possible, between the removal position and the dispensing position. 
     FIGS. 3 and 4 show the dispensing mechanism of the article dispensing unit of FIGS. 1 and 2 on an enlarged scale. In this respect a major consideration is that, as shown in FIG. 3, the articles  4  have a tendency to form in front of the dispensing mechanism a so-called bridge in which the articles  4  are jammed or wedged tight in the region of the dispensing mechanism in such a fashion that the articles  4  which are adjacent to the rotary body  6  cannot move any further, under their own weight. The consequence of this is that the articles  4  no longer pass into the recesses  16  in the rotary member  6  so that, in a regular dispensing procedure—that is to say in spite of correct payment being made for the article—no article can pass into the rotary body and thus be dispensed. The stack of articles disposed above the bridge configuration additionally stabilizes the bridge configuration and thus additionally increases the wedging and jamming effect. 
     To avoid the bridge configuration which is formed by the articles in the article shaft section, provided in the interior  2  of the article compartment  1 , more specifically in the illustrated embodiment at the inside at the front wall  3  of the article compartment  1 , is a motion member  40 . In the illustrated embodiment the motion member  40  is in the form of an angle lever and is supported pivotably about an axis  50  which extends parallel to the axis  7  of the rotary body  6  at a predetermined spacing over the width of the article compartment  1  or over the width of a plurality of article compartments. In this arrangement, the spacing of the axis  15  from the axis of rotation  7  of the rotary body  6  is such that, upon rotation of the rotary body  6 , the motion member  40  passes into direct mechanical contact with the rotary body  6 , more specifically with the free ends of the vanes, and is forced to perform a pivotal movement upon contact with the rotary body  6  by the vanes  17 . 
     In the illustrated embodiment, the motion member  40  is in the form of a two-armed angle lever whose lower arm  41  has a lower engagement portion  42  and whose upper arm  43  has an upper engagement portion  44 . Upon a rotary movement of the rotary body  6  the lower engagement portion  42  comes into mechanical engagement contact with the external contour  18  of the vanes  17  and is pivoted thereby so that the upper engagement portion  44  presses against the periphery of an article  4  and urges said article  4  upwardly in order in that way to remove the jamming effect of the bridge configuration. In that way the articles—in the illustrated embodiment being drinks cans—can fall towards the rotary body under their own weight, and one of the articles passes into the recess  16  of the rotary body, which is still free, and in the next dispensing operation that article in question is then dispensed. 
     The two arms  41 ,  43  of the motion member  40  which is in the form of an angle lifting member form relative to each other an angle a of 180°, preferably between 60° and 120°. The two arms  41 ,  43  of the angle lever are directed with their free ends towards the front wall  3  and the dispensing opening  15  respectively of the article compartment. In the illustrated embodiment arranged at the periphery  18  of the vanes  17  of the rotary body  6  are control projections or cams  18   a,    18   b  which are directed radially outwardly and which impart a respective additional motion pulse to the motion member  40  when the lower arm  41  slides over the control cams  18   a,    18   b.  The motion member can also be in the form of a segment of a circular disk which is mounted pivotably at its tip at the axis  50 , but alternatively it is also possible to envisage various other peripheral configurations for the motion member  40 . 
     Alternatively, it is also possible for the motion member  40 —or for each article compartment  1  a plurality of motion members  40  which are arranged in parallel mutually juxtaposed relationship—to be driven by way of a drive which is derived from the first drive  60 , or by way of its or their own second electrical drive (not shown). The important consideration is that each motion member  40  is set in motion prior to and/or during each dispensing procedure, that is to say during each motion step of the rotary body  6 , so that the bridge configuration of the articles is reliably destroyed prior to each removal/dispensing procedure, so that the removal of an article is guaranteed in each dispensing operation.