Patent Publication Number: US-2012031734-A1

Title: Sorter

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Japanese Patent Application No. 2010-176907 filed on Aug. 6, 2010 and Japanese Patent Application No. 2011-140735 filed on Jun. 24, 2011. The entire disclosures of Japanese Patent Application Nos. 2010-176907 and 2011-140735 are hereby incorporated herein by reference. 
     TECHNICAL FIELD 
     The present invention relates to a sorter arranged at a certain point during conveyance of articles. 
     BACKGROUND ART 
     Conventionally, sorters have been used to change the conveyance route of articles according to the result of inspection of the articles. This type of sorter has been daily studied and developed in various ways. 
     For example JP-UM-A-H06-10230 discloses a small multi-direction sorter/conveyor apparatus capable of sorting and conveying at a low cost and in an effective manner. 
     The multi-direction sorter/conveyor apparatus described in JP-UM-A-H06-10230 includes: a loop conveyor belt mechanism configured to form a wide flat conveyance surface having a function of endlessly rotating and driving a loop conveyor belt extended in a loop shape between two rotation shafts disposed parallel to each other at both ends so as to convey articles to an upper portion of the loop conveyor belt in a single direction, from one side of the two rotation shafts to the other side; a single supply conveyor arranged to connect the flat conveyance surface to an upstream portion of the wide flat conveyance surface; a plurality of exhaust conveyors arranged to connect the flat conveyance surface to a downstream portion of the wide flat conveyance surface; a pair of parallel ultrathin band plates that are supported in such a slidable manner that one end is fixed to an exit of the single supply conveyor and the other end is connectable to each entrance of the plurality of exhaust conveyors, and that are arranged for guiding an article introduced from the supply conveyor and conveyed on the flat conveyance surface to one of the plurality of exhaust conveyors; and a control mechanism that controls the slidably supported ends of the pair of parallel ultrathin band plates so as to connect to one of the plurality of exhaust conveyors corresponding to a control signal. 
     JP-A-S59-36031 discloses a distribution feeding conveyor apparatus that distributes and feeds an article from one supply source to article supply positions distributed in planar fashion along one straight line. The distribution conveyor apparatus described in JP-A-S59-36031 includes: a belt conveyor; a support device which can move laterally along a predetermined horizontal straight line so that a traveling-direction distal end of the belt conveyor traverses the traveling-direction end, of which the base end rotates following the lateral movement at an approximately constant position, and which supports the conveyor belt to permit a small displacement in a direction along the traveling direction; and a second drive portion that reciprocally drives the belt conveyor in a lateral direction within the permitted range of the support device. 
     JP-A-S54-131257 discloses an article classifier. The article classifier described in JP-A-S54-131257 includes: a plurality of article conveyance plates each of which has a protruded rod extending from its bottom surface and which are arranged slidably in the width direction of an endless conveyor; a selection device to slide the article conveyance plates to a predetermined position in the width direction by selectively engaging to the protruded rod; and a guide rail that guides the article conveyance plates to a desired position of the exit of the endless conveyor by working with the protruded rod of the article conveyance plates, each of which has been slid to the desired position. 
     SUMMARY 
     However, in the small multi-direction sorter/conveyor apparatus described in the Patent Literature 1, the ultrathin band plates in an upright position are driven on the top surface of the flat conveyor belt driven along the horizontal surface. In this case, the article is conveyed by the flat conveyor in a single direction, guided by the ultrathin plates, and as a result, the article receives a force perpendicular to the conveyance direction. Consequently, there arises a problem that the article is sandwiched in a gap between the flat conveyor and the ultrathin plates. Another problem is that when the gap is decreased, the durability of the conveyor rapidly decreases due to friction between the flat conveyor and the ultrathin plates. 
     In a sorting chute in the distribution conveyor apparatus described in the JP-A-S59-36031, a position of the end of the belt conveyor moves in a manner to depict an arc, as illustrated in  FIG. 2 . Therefore, when the belt conveyor is arranged downstream of the horizontal surface of the apparatus, a gap is formed, and this leads to a problem that an article drops from the gap. 
     Furthermore, the article classifier described in Patent Literature 3 includes a plurality of article conveyance plates, and thus, maintenance frequency increases and costs become expensive. 
     Moreover, with regard to the orientation in which an article is conveyed, in general it is desired that the article is conveyed stably. For example, packing, etc., are performed at the downstream, and thus, if the article is conveyed in a uniform orientation, then reliable packing is possible. 
     Therefore, when types of article are changed, i.e., even when the size of the article is changed, it is desirable that the conveyance orientation not be changed. 
     An objective of the present invention is to provide a sorter capable of stably sorting multiple types of articles from one line into multiple lines at a low cost. 
     (1) The sorter according to one aspect is a sorter that sorts articles conveyed as one line at an entrance, into a plurality of lines of articles at an exit, relative to the width direction of the conveyance direction of the articles, and includes: an elastic continuous conveyance body that supports the bottom surface of the article; an entrance rotation roller over which the continuous conveyance body is provided at the entrance; an exit rotation roller over which the continuous conveyance body is provided at the exit, and a drive device that slides the exit rotation roller in a direction orthogonal to the conveyance direction. 
     In the sorter, the continuous conveyance body is provided over the entrance rotation roller and the exit rotation roller. Then, the exit rotation roller is slid and moved by the drive device. 
     In this case, when an elastic continuous conveyance body is used, it is possible to reliably hold the bottom surface of the article from the entrance to the exit. That is, when a member that does not have elasticity is used, then as the exit moves in an arc, a gap or a transfer portion is generated with respect to the downstream belt conveyor. In the sorter according to the present aspect, an elastic continuous conveyance body is used, and thus, the gap and the transfer portion are not generated. Moreover, it is possible to form the sorter by using several drive locations, and thus, it is possible to decrease the drive cost in sorting. Further, it is possible to sort the articles over a relatively short distance. 
     (2) In the sorter according to a second aspect, a plurality of continuous conveyance bodies, which are narrow in width, are arranged in the conveyance direction. 
     In this case, it is possible to keep the elastic force of the continuous conveyance bodies low, and it is possible to simplify the structure of the slide mechanism of the exit rotation roller. Moreover, when a plurality of continuous conveyance bodies are arranged, it is possible to convey the article while maintaining the article conveyance orientation. Furthermore, the continuous conveyance body may be formed to have an arbitrary shape in cross section such as a circular round belt, a star shape, other polygonal shapes, an ellipsoidal shape, etc., and a shape having a protrusion, having an asperity, and a shape having a large frictional resistance. 
     (3) The sorter according to the third aspect further comprises a guide portion that sorts the articles in the width direction of the conveyance direction, wherein one end side of the guide portion is fixed to the entrance rotation roller, and the other end side of the guide portion moves in synchronization with the exit rotation roller. 
     In this case, it is possible to reliably sort the articles in the width direction even in the case of a high-speed conveyance. Moreover, the guide portion moves in synchronization with the continuous conveyance body, and making it possible to prevent the articles from being damaged due to friction. 
     (4) The sorter according to the fourth aspect is formed by a curvable plate. 
     In this case, an article conveyance route can be smoothly arranged, and thus, it is possible to convey the article smoothly. Consequently, it is possible to reduce the force by which the article contacts the guide portion, and it is possible to perform high-speed article conveyance and article sorting while maintaining the conveyance orientation of the article. 
     (5) The sorter according to the fifth aspect comprises: an orientation stabilizing rotation roller arranged downstream of the exit rotation roller; an orientation conveyance body, provided over the exit rotation roller and the orientation stabilizing rotation roller, which supports the article; and an orientation drive device that slides the orientation stabilizing rotation roller in a direction orthogonal to the conveyance direction in synchronization with the exit rotation roller. 
     In this case, an elastic orientation conveyance body is arranged also between the exit rotation roller and the orientation stabilizing rotation roller, and thus, it is possible to stabilize the article conveyance orientation between the exit rotation roller and the orientation stabilizing rotation roller. Consequently, it is possible to keep the orientation of the article constant. 
     (6) In the sorter according to the sixth aspect, space is created below the plurality of continuous conveyance bodies. 
     In this case, it is possible to downwardly drop an object other than the article, such as dust, from between the continuous conveyance bodies. In particular, it is possible to arrange a dust collection plate member below the predetermined space. 
     According to the sorter based on the present invention, it is possible to stably sort multiple types of articles from one line into multiple lines. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic plan view illustrating one example of a sorter according to a first embodiment. 
         FIG. 2  is a schematic side view of the sorter illustrated in  FIG. 1 . 
         FIG. 3  is a schematic top view of the sorter illustrated in  FIG. 1  and  FIG. 2 . 
         FIG. 4  is an explanatory diagram explaining an operation of the sorter according to the first embodiment. 
         FIG. 5  is an explanatory diagram explaining an operation of the sorter according to the first embodiment. 
         FIG. 6  is a schematic plan view illustrating one example of a sorter according to a second embodiment. 
         FIG. 7  is a schematic side view illustrating one example of the sorter according to the second embodiment. 
         FIG. 8  is a schematic explanatory diagram explaining an operation of the sorter according to the second embodiment. 
         FIG. 9  is a schematic explanatory diagram explaining an operation of the sorter according to the second embodiment. 
         FIG. 10  is a schematic diagram explaining a cross section taken along A-A line of a guide plate of  FIG. 8 . 
         FIG. 11  is a schematic diagram explaining one example of a guide plate according to a third embodiment. 
         FIG. 12  is a schematic diagram explaining one example of a guide plate according to a fourth embodiment. 
         FIG. 13  is a schematic plan view illustrating another example of a sorter according to a fifth embodiment. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     First Embodiment 
     With reference to drawings, a sorter  100  according to a first embodiment will be explained, below. 
       FIG. 1  is a schematic plan view illustrating one example of the sorter  100  according to the first embodiment,  FIG. 2  is a schematic side view of the sorter  100  illustrated in  FIG. 1 , and  FIG. 3  is a schematic top view of the sorter  100  illustrated in  FIG. 1  and  FIG. 2 . 
     As illustrated in  FIG. 1 ,  FIG. 2 , and  FIG. 3 , the sorter  100  sorts an article conveyed in the direction of arrow X, as illustrated, by moving the article in the direction of arrow ±Y at the exit side. 
     The sorter  100  is provided mainly with an entrance rotation roller  200 , a rubber conveyance member  300 , and an exit rotation roller  400 , a motor HM that drives the entrance rotation roller  200 , and a motor SM that slides and drives the exit rotation roller  400 . 
     Entrance Rotation Roller 
     The entrance rotation roller  200  is formed by a roller shaft  210 , and a roller  220 , and a pulley  230 . The roller  220  is cylindrically formed. The pulley  230  is arranged to form a pair with a pulley  231  described later, and a belt B 2  is wound around the pulleys  230  and  231 . In the roller  220 , a plurality of slits  221  along the circumference are formed at a predetermined interval. The depth of the slit  221  is formed to be larger than the thickness of the cross section of the rubber conveyance member  300  described later. In the first embodiment, the slits  221  are arranged at eight locations. 
     Exit Rotation Roller 
     The exit rotation roller  400  is formed by a roller shaft  410 , a roller  420 , a fixed member  440 , a belt fixed member  441 , and a slide rail  460 . The roller  420  is cylindrically formed. In the roller  420 , a plurality of slits  421  along the circumference are formed at a predetermined interval. The depth of the slit  421  is formed to be larger than the thickness of the cross section of the rubber conveyance member  300  described later. In the first embodiment, the slits  421  are arranged at eight locations so that the slits  421  and  221  are equal in number. 
     The fixed member  440  axially supports the roller shaft  410 . The fixed member  440 , to which the belt fixing member  441  is arranged, is fixed to a belt B 4  described later. Below (in the direction of arrow −Z) the fixed member  440 , there is formed a slide rail  460  (see  FIG. 2  and  FIG. 3 ) that holds the exit rotation roller  400  to enable sliding in the direction of arrow ±Y. 
     Rubber Conveyance Member 
     In the first embodiment, the rubber conveyance member  300  is an endless rubber belt of which the cross section is circular. The rubber conveyance member  300  is made from elastic rubber. As illustrated from  FIG. 1  to  FIG. 3 , the rubber conveyance member  300  is provided over the slit  221  of the entrance rotation roller  200  and the slit  421  of the exit rotation roller  400 . 
     Motor That Drives Entrance Rotation Roller 
     In the motor HM, the pulley  231  is arranged on a motor shaft HMC. As described above, the belt B 2  is wound around the pulley  231 . Therefore, the drive force of the motor HM is transmitted to the entrance rotation roller  200  via the motor shaft HMC, the pulley  231 , the belt B 2 , and the pulley  230 . 
     Motor That Slides and Moves Exit Rotation Roller 
     In the motor SM, the pulley  431  is arranged on a motor shaft SMC. A shaft  452  is arranged separately from the motor shaft SMC. To the shaft  452 , the pulley  432  is attached. The belt B 4  is wound around a pair of pulleys  431  and  432 . Therefore, the drive force of the motor SM is transmitted to the motor shaft SMC, the pulley  431 , the belt B 4 , and the belt fixing member  441 , and as a result, the exit rotation roller  400  is slid and moved in the direction of arrow Y. 
     Explanation of Operation 
     Subsequently, the operation of the sorter  100  according to the first embodiment will be explained.  FIG. 4  and  FIG. 5  are explanatory diagrams explaining the operation of the sorter  100  in the first embodiment. 
     First, as illustrated in  FIG. 4 , the sorter  100  is arranged between an upstream conveyance belt  910  and a downstream conveyance belt  920 . 
     Then, as illustrated in  FIG. 4 , the motor HM is driven. Subsequently, by the drive force of the motor HM, the entrance rotation roller  200  is rotated in the direction of arrow R. The drive force is then transmitted to the rubber conveyance member  300 , and the exit rotation roller  400  is driven for rotation in the direction of arrow R. 
     In this case, as illustrated in  FIG. 4 , the article conveyed from the upstream conveyance belt  910  is handed over by way of the sorter  100  to a region  920 A side of the downstream conveyance belt  920 . 
     Next, the motor SM is driven. Then, by way of the belt B 4  by the drive force of the motor SM, the exit rotation roller  400  is slid and moved in the direction of arrow Y. As a result, as illustrated in  FIG. 5 , the exit rotation roller  400  is slid and moved. 
     In this case, as illustrated in  FIG. 5 , the article conveyed from the upstream conveyance belt  910  is handed over by way of the sorter  100  to a region  920 B side of the downstream conveyance belt  920 . This operation is repeated so that the articles are sorted. 
     Effect Provided in First Embodiment 
     As described above, in the sorter  100  according to the first embodiment, the rubber conveyance member  300  that is elastic and has a high friction resistance is used, and thereby, the bottom surface of the article can be reliably held from the entrance to the exit. That is, when a member that does not have elasticity is used, the exit moves in an arch, and thus, a gap or a transfer portion is generated with respect to the downstream conveyance belt  920 . 
     In the sorter  100  according to the present invention, the elastic rubber conveyance member  300  is used, and thus, the gap and the transfer portion are not generated. Moreover, it is possible to form the sorter  100  by using the motor SM and the motor HM only, and thus, it is also possible to decrease the drive cost in sorting. 
     The cross section of the rubber conveyance member  300  is rounded, and thus, it is possible to keep the elastic force of the rubber conveyance member  300  low and it is possible to simplify the structure of the slide mechanism of the exit rotation roller  400 . Moreover, when a plurality of rubber conveyance members  300  are arranged, it is possible to convey the article while maintaining the article conveyance orientation. 
     The rubber conveyance member  300  is provided over with a predetermined gap, and thus, it is possible to downwardly drop an object other than the article, such as dust, from between the rubber conveyance members  300 . 
     Second Embodiment 
     With reference to drawings, a sorter  100   a  according to a second embodiment will be explained, below.  FIG. 6  is a schematic plan view illustrating one example of the sorter  100   a  according to the second embodiment, and  FIG. 7  is a schematic side view illustrating one example of the sorter  100   a  according to the second embodiment. 
     As illustrated in  FIG. 6  and  FIG. 7 , the sorter  100   a  is obtained by further providing a guide device  500  to the sorter  100  illustrated in  FIG. 1  and  FIG. 2 . 
     The guide device  500  is formed by guide members  520 ,  521 , and  540 , and a guide plate  510 . 
     The guide members  520  and  521  are integrated with the entrance rotation roller  200 , and the guide member  540  is integrated with the exit rotation roller  400 . 
     The guide plate  510  is formed by a pair of bendable plate members, and is arranged at either exterior side (Y-side and −Y-side in the figure) of the rubber conveyance member  300 . 
     Explanation of Operation of Guide Plate  510   
       FIG. 8  and  FIG. 9  are schematic explanatory diagrams explaining the operation of the sorter  100   a  according to the second embodiment. 
     As illustrated in  FIG. 4  and  FIG. 5 , the exit rotation roller  400  slides and moves in the direction of arrow Y or in the direction of arrow −Y. As a result, in this embodiment also, as illustrated in  FIG. 8  and  FIG. 9 , the guide plate  510  curves according to the movement of the exit rotation roller  400 . 
     In this case, a region  512  and a region  514  of the guide plate  510  are each held by the guide members  520 ,  521 , and  540 , and thus, the guide plate  510  maintains linearity along the conveyance direction; however, the guide plate  510  is not held in a region  510   s,  and therefore, the guide plate  510  curves according to the slide movement of the exit rotation roller  400 . 
       FIG. 10  is a schematic diagram explaining a cross section taken along A-A line of the guide plate  510  of  FIG. 8 . 
     As illustrated in  FIG. 10 , the guide plate  510  is inwardly inclined at an angle of θ degrees each. That is, the guide plate  510  is arranged to be inclined at an angle of θ degrees from the vertical direction. 
     Effect Provided in Second Embodiment 
     Thus, the sorter  100   a  according to the second embodiment is obtained by further providing the guide device  500  to the sorter  100  according to the first embodiment, and thus, it is possible to sort articles even in the case of high-speed conveyance. 
     Further, the guide plate  510  of the guide device  500  slides and moves together with the rubber conveyance member  300  or conveyance surface, and thus, it is possible to prevent an article from being damaged due to friction. Further, the guide plate  510  of the guide device  500  is arranged at an angle of θ degrees, and thus, it is possible to perform a high-speed article conveyance and an article sorting while maintaining the conveyance orientation of the article. 
     THIRD EMBODIMENT 
       FIG. 11  is a schematic diagram explaining one example of the guide plate  510  according to a third embodiment. 
     As illustrated in  FIG. 11 , in the third embodiment, a guide plate  510   b  is provided instead of the guide plate  510  in the second embodiment. 
     The guide plate  510   b  is formed by a curved plate so as to wrap around an article conveyed on the rubber conveyance member  300 . 
     Effect Provided in Third Embodiment 
     Thus, the sorter  100   b  according to the third embodiment is provided with the curved guide plate  510   b  instead of the guide plate  510  of the sorter  100   a  according to the second embodiment, and thus, similarly to the sorter  100   a  according to the second embodiment, it is possible to sort an article even in the case of high-speed conveyance. 
     Further, the guide plate  510  slides and moves together with the rubber conveyance member  300 , which is a conveyance surface, and thus, it is possible to prevent an article from being damaged due to friction. Further, the guide plate  510   b  of the guide device  500  is arranged in curved fashion, and thus, it is possible to perform high-speed article conveyance and article sorting while maintaining the conveyance orientation of the article. 
     Fourth Embodiment 
       FIG. 12  is a schematic diagram explaining one example of the guide plate  510  according to a fourth embodiment. 
     In the fourth embodiment, in addition to the guide plate  510  in the second embodiment, rubber conveyance members  301  to  304  are provided. 
     In the sorter  100   c,  a rubber conveyance member  301  having a small cross section diameter is arranged at a central part of conveying an article; rubber conveyance members  302  and  303  having a cross section diameter, that gradually becomes larger when moving closer to the guide plate  510 , are arranged; and a rubber conveyance member  304  having a large cross section diameter is arranged at the outermost area. 
     This configuration forms a curved line LN, relative to the bottom surface of the article. The result is that it is possible to reduce the force by which the article contacts the guide device  500 , and it is possible to perform high-speed article conveyance and article sorting while maintaining the conveyance orientation of the article. 
     Fifth Embodiment 
     With reference to drawings, a sorter  100 d according to a fifth embodiment will be explained, below.  FIG. 13  is a schematic plan view illustrating one example of the sorter  100   d  according to the fifth embodiment. 
     As illustrated in  FIG. 13 , the sorter  100   d  according to the fifth embodiment includes an exit rotation roller  400   d  instead of the exit rotation roller  400  according to the first embodiment, and further includes an orientation stabilizing roller  600  and a rubber conveyance member  700 . 
     Exit Rotation Roller 
     As illustrated in  FIG. 13 , the exit rotation roller  400   d  is formed by the roller shaft  410 , the roller  420 , a fixed member  440   d,  the belt fixing member  441 , and the slide rail  460 . The roller  420  is cylindrically formed. In the roller  420 , a plurality of slits  421  along the circumference are formed at a predetermined interval. 
     Moreover, between the slits  421  of the rollers  420 , slits  422  along the circumference are respectively arranged. The depth of the slits  421  and  422  is formed to be larger than the thickness of the cross section of rubber conveyance members  300  and  700  described later. In the fifth embodiment also, slits  421  are arranged at eight locations so that the slits  421  and  221  are equal in number, and the slits  422  are arranged at seven locations. 
     Orientation Stabilizing Roller 
     As illustrated in  FIG. 13 , the orientation stabilizing roller  600  is arranged in the fixed member  440   d  of the exit rotation roller  400   d.  The orientation stabilizing roller  600  is arranged in parallel to the exit rotation roller  400   d.    
     The orientation stabilizing roller  600  is formed by a roller shaft  610  and a roller  620 . The roller  620  is cylindrically formed. In the roller  620 , a plurality of slits  621  along the circumference are formed at a predetermined interval. The depth of the slit  621  is formed to be larger than the thickness of the cross section of the rubber conveyance member  700  described later. In the fifth embodiment, the slits  621  are arranged at seven locations so that the slits  621  and  422  are equal in number. 
     The orientation stabilizing roller  600 , which is arranged in the fixed member  440 d of the exit rotation roller  400   d,  is arranged in a manner to enable sliding in the direction of arrow ±Y in synchronization with the exit rotation roller  400   d.    
     Rubber Conveyance Member 
     As illustrated in  FIG. 13 , the rubber conveyance member  700  is an endless rubber belt having a circular cross section. The rubber conveyance member  700  is made from elastic rubber. The rubber conveyance member  700  is provided over the slit  422  of the exit rotation roller  400   d  and the slit  621  of the orientation stabilizing roller  600 . 
     Explanation of Operation 
     Subsequently, the operation of the sorter  100   d  according to the fifth embodiment will be explained. First, the motor HM is driven. Then, by the drive force of the motor HM, the entrance rotation roller  200  is rotated. The drive force is then transmitted to the rubber conveyance member  300 , and the exit rotation roller  400   d  is driven for rotation. The rotation of the exit rotation roller  400   d  causes the orientation stabilizing roller  600  to rotate. 
     In this case, the article conveyed from the upstream conveyance belt  910  (see  FIG. 4 ) is handed over by way of the sorter  100   d  to a region  920 A side of the downstream conveyance belt  920  (see  FIG. 4 ). In this case, the article is conveyed in the direction of arrow X between the exit rotation roller  400   d  and the orientation stabilizing roller  600 , and thus, it is possible to hand over the article to the downstream while reliably stabilizing the orientation of the article. 
     Next, the motor SM is driven. Then, by way of the belt B 4  by the drive force of the motor SM, the exit rotation roller  400   d  and the orientation stabilizing roller  600  are slid and moved in the direction of arrow Y. 
     In this case, the article conveyed from the upstream conveyance belt  910  is handed over by way of the sorter  100   d  to a region  920 B side of the downstream conveyance belt  920 . 
     Effect Provided in Fifth Embodiment 
     Thus, in the sorter  100   d  according to the fifth embodiment, the elastic rubber conveyance member  700  is arranged also between the exit rotation roller  400   d  and the orientation stabilizing roller  600 . As a result, it is possible to stabilize the article conveyance orientation between the exit rotation roller  400   d  and the orientation stabilizing roller  600 . Consequently, it is possible to keep the orientation of the article constant. That is, it is possible to further stabilize the conveyance orientation because the article is conveyed in the direction of arrow X while the bottom surface of the article is held. 
     In the above-described embodiments, the direction of arrow X corresponds to an article conveyance direction, the direction of arrow Y corresponds to the width direction of the article conveyance direction, the sorters  100 ,  100   a,    100   b,    100   c,  and  100   d  correspond to a sorter, and the rubber conveyance members  300 ,  301 ,  302 ,  303 , and  304  correspond to an elastic continuous conveyance body. The entrance rotation roller  200  corresponds to an entrance rotation roller, the guide plate  510  corresponds to a guide portion, the exit rotation rollers  400  and  400   d  correspond to an exit rotation roller, the motor SM corresponds to a drive device, and the orientation stabilizing roller  600  corresponds to an orientation stabilization rotation roller. The rubber conveyance member  700  corresponds to an elastic orientation conveyance body, and the fixed member  440   d  of the motor SM and the exit rotation roller  400   d  correspond to an orientation drive device. 
     Modification 
     It is noted that in the above-described embodiments, the rubber conveyance members  300 ,  301 ,  302 ,  303 , and  304  are used; however, the present invention is not limited thereto, and another elastic member may be used, and further, the cross sectional shape may be another arbitrary shape. 
     In the embodiments, one line of articles is conveyed at the entrance side and then the articles are sorted into two lines at the exit side; however, the present invention is not limited thereto, and the articles may be sorted into an arbitrary number of lines such as three lines. It may be also possible that the articles are conveyed in a plurality of lines at the entrance side and then, at the exit side, the articles are sorted into one line or a plurality of lines lesser than those at the entrance side. 
     It may be further possible that the exit rotation roller  400  is moved not only within the horizontal surface but also moved parallel in an orthogonal direction (direction of arrow Z) so that the articles are sorted in orthogonally up and down directions. As a result, it is possible to sort the articles not only on the horizontal surface but also in the orthogonal direction. Needless to say, it may be possible to sort the articles in the horizontal direction and the orthogonal direction in a combined manner. This results in multiple sorting in a small space. 
     In the embodiments, the exit rotation roller  400  is driven for rotation following the rotation of the entrance rotation roller  200 ; however, the present invention is not limited thereto, and a drive device that rotates the exit rotation roller  400  may be separately arranged. 
     In the embodiments, the slits  221 ,  421 , and  422  are formed larger in depth than the cross sectional thickness of the rubber conveyance member  300  so that the rubber conveyance member  300  is not removed due to the slide movement of the exit rotation roller  400 ; however, the present invention is not limited thereto, and when the slide movement amount of the exit rotation roller  400  is small, the slits  221 ,  421 , and  422  may be formed smaller in depth than the cross sectional thickness of the rubber conveyance member  300 . 
     Moreover, preferred embodiments of the present invention are thus described, and the present invention, however, is not limited thereto. It is to be understood that other various embodiments may be possible without departing from the spirit and scope of the present invention. Moreover, in the embodiments, the operation and effect achieved by the configuration of the present invention are described, and the operation and effect, however, are mere exemplary and do not limit the present invention. 
     REFERENCE SIGNS LIST 
       100 : Sorter;  100   a:  Sorter;  200 : Entrance rotation roller;  210 : Roller shaft;  220 : Roller;  221 : Slit;  230 : Pulley;  231 : Pulley;  300 : Rubber conveyance member;  400 : Exit rotation roller;  400   a:  Exit rotation roller;  410 : Roller shaft;  420 : Roller;  421 : Slit;  422 : Slit; 431 : Pulley;  432 : Pulley;  440 : Fixing member;  440   a:  Fixing member;  441 : Belt fixing member;  452 : Shaft;  460 : Slide rail;  600 : Orientation stabilizing roller;  610 : Roller shaft;  620 : Roller;  621 : Slit;  700 : Rubber conveyance member;  910 : Upstream conveyance belt;  920 : Downstream conveyance belt;  920 A: Region;  920 B: Region; HMC: Motor shaft; SMC: Motor shaft; B 2 : Belt; B 4 : Belt; HM: Motor; and SM: Motor.