Abstract:
A bundling apparatus for sheet-type medium is used for stacking and bundling sheet-type medium. The bundling apparatus for sheet-type medium comprises a banknote delivery channel ( 11 ), a bundling mechanism ( 13 ) and a position switching mechanism ( 14 ), a banknote stacking position ( 61 ) formed at the end of the banknote delivery channel as well as a bundling position ( 62 ) formed corresponding to the bundling mechanism, the position switching mechanism ( 14 ) comprising a rotating power shaft ( 41 ) driven by an electric motor and at least two banknote stacking plates ( 51 ) installed evenly on the power shaft. When any banknote stacking plate is located in the banknote stacking position, a corresponding banknote stacking plate is located in the bundling position. The present invention achieves the transition between the motion of stacking and bundling the sheet-type medium, improves work efficiency and saves space.

Description:
[0001]    The present application claims the benefit of priority to Chinese Patent Application No. 201110116610.4, entitled “SHEET-TYPE MEDIUM BUNDLING DEVICE”, filed with the Chinese State Intellectual Property Office on May 6, 2011, the entire disclosure of which is incorporated herein by reference. 
       FIELD OF THE INVENTION 
       [0002]    The present application relates to a sheet-type medium bundling device, in particular, to a sheet-type medium bundling device which can achieve a cooperation of the stacking and the bundling operations of sheet-type mediums by position switching. 
       BACKGROUND OF THE INVENTION 
       [0003]    As sheet-type mediums, such as paper money, paper, bill or the like, are commonly used in our everyday life, various mechanical apparatus for sheet-type mediums are becoming available, such as a separating apparatus, a detecting apparatus, a bundling apparatus or the like. In the sheet-type medium bundling device, the sheet-type mediums need to suffer four successive processes, i.e., a stacking operation, an arranging operation, a bundling operation and a conveying operation. Therefore, the traditional sheet-type medium bundling device includes a conveying passage, an arranging mechanism, a clamping and conveying mechanism and a bundling mechanism. The clamping and conveying mechanism normally employ a mechanical pushing member. In operation, every single sheet of sheet-type medium is conveyed to a stacking plate at the arranging mechanism via the conveying passage. After a time period of T1, a stack of sheet-type mediums is formed. The arranging mechanism performs a long side arranging and a short side arranging to the stack of sheet-type mediums so as to form a sheet-type medium stack within a time period of T2. Then the clamping and conveying mechanism clamps and conveys the arranged sheet-type medium stack to the bundling mechanism, and it takes a time period of T3 for the bundling mechanism to perform the bundling operation. Next, it takes the clamping and conveying mechanism a time period of T4 to convey the bundled sheet-type medium stack out. That is, an operation cycle of a traditional sheet-type medium bundling device is a total time period of Tt (cycle time)=T1 (stacking time)+T2 (arranging time)+T3 (bundling time)+T4 (outputting time). Therefore this kind of sheet-type medium bundling device is time-consuming and thus has a low efficiency. 
         [0004]    In order to reduce the stacking time T1, those skilled in the art usually provide an additional stacking plate to realize a parallel operation solution by utilizing two stacking plates alternately for the stacking and the bundling. However, in this type of sheet-type medium bundling device, a mechanical pushing member is required for switching the stacking plates between two positions successively and repeatedly. Further, since the distance between the two positions is large, this type of sheet-type medium bundling device system is complicated and occupies too much space. 
         [0005]    Therefore, there is an urgent demand to provides a sheet-type medium bundling device which can solve the above problems while being less time consuming, high in efficiency and space saving. 
       SUMMARY OF THE INVENTION 
       [0006]    In view of this, an object of the present application is to provide a sheet-type medium bundling device which is less time consuming, high in efficiency and space saving. 
         [0007]    In order to achieve the above object, it is provided according to the present application a sheet-type medium bundling device for a cooperative operation of stacking and bundling of sheet-type mediums. The sheet-type medium bundling device includes: a conveying passage, a bundling mechanism, a position switching mechanism, a stacking position formed at an end of the conveying passage, and a bundling position formed corresponding to the bundling mechanism. Wherein the conveying passage, the bundling mechanism and the position switching mechanism are mounted on a frame. The position switching mechanism includes a power shaft driven by a motor and at least two stacking plates evenly provided on the power shaft, and when one of the stacking plates is located at the stacking position, another one of the stacking plates is located at the bundling position. 
         [0008]    Preferably, the power shaft is provided with a mounting shaft sleeve, on which the stacking plates are fixedly mounted. Each stacking plate is of a “U” shape or a “V” shape and is opened outwards. Each stacking plate includes a guiding surface located upstream of the power shaft and a stacking surface located downstream of the power shaft. An end of the guiding surface is bent towards an upstream direction of the power shaft, such that a guiding surface at the stacking position is contiguous with the end of the conveying passage, thereby guiding every single sheet of sheet-type medium out of the conveying passage to stack the sheet-type mediums on the stacking surface at the stacking position. The guiding surface, on one hand, is configured for guiding the sheet-type medium conveyed from the conveying passage, and on the other hand, is configured for blocking the sheet-type medium on the stacking surface, to prevent the sheet-type medium on the stacking surface from leaving the stacking surface in a position switching operation. 
         [0009]    Preferably, a code disc is mounted at an end of the power shaft, and the code disc is provided thereon with notches corresponding to the stacking plates. A sensor for sensing the information of the notches is mounted at a position corresponding to the code disc. By means of the code disc and the sensor, a specific location of each stacking plate on the position switching mechanism can be monitored in real time, thereby ensuring the accuracy of position switching of the position switching mechanism. 
         [0010]    Preferably, the number of the stacking plates is six, and the stacking position and the bundling position correspond to two adjacent stacking plates. Since the six stacking plates are evenly provided on the power shaft, and the stacking position and the bundling position correspond to two adjacent stacking plates, the angle between the stacking position and the bundling position is 60°, thereby the structure is compact, which effectively saves the space occupied by the sheet-type medium bundling device. 
         [0011]    A falling position is formed downstream of the bundling position, and a falling plate is obliquely mounted at a position corresponding to the falling position. Because of the inclined arrangement of the falling plate, the sheet-type medium stack on the stacking plate moved to the stacking position is blocked by the falling plate and slides freely along the falling plate, thereby completing the falling operation of the present application. 
         [0012]    Preferably, each stacking plate is provided with a groove, and one end of the falling plate extends towards a direction of the groove to form a blocking arm which blocks the sheet-type medium stack on the stacking plate, such that the sheet-type medium stack falls onto the falling plate, and the other end of the falling plate corresponds to a position of a container for storing a sheet-type medium stack to guide the sheet-type medium stack to fall into the container. When a stacking plate passes the falling position, the blocking arm of the falling plate passes through the groove in the stacking plate to block the sheet-type medium stack on the stacking plate such that the sheet-type medium stack slides automatically along the falling plate to the container to be stored therein. Therefore, it substantially takes no time for the falling operation of the present application, and the sheet-type medium bundling device according to the present application has a compact structure and occupies a small space. 
         [0013]    A long side arranging mechanism is mounted at a position corresponding to the stacking position, and a short side arranging mechanism is mounted at a position corresponding to the bundling position. The long side arranging mechanism and the short side arranging mechanism are configured for arranging the sides of the sheet-type mediums, to facilitate the clamping and conveying and the bundling of the sheet-type mediums. Therefore the sheet-type medium bundling device according to the present application has a compact structure and occupies a small space. 
         [0014]    A clamping and conveying mechanism is mounted at a position corresponding to the bundling position, and the clamping and conveying mechanism clamps and conveys the sheet-type medium stack at the bundling position to the bundling mechanism. 
         [0015]    Preferably, the clamping and conveying mechanism includes a motor, a synchronous belt, a slide shaft and a clamp assembly. Wherein, the slide shaft is parallel to a stacking plate at the stacking position, and one end of the slide shall is mounted on a mounting frame at a left side of the position switching mechanism, the other end of the slide shaft is mounted on a fixing frame at a right side of the position switching mechanism. The clamp assembly is slidably mounted on the slide shaft. The motor is connected to the synchronous belt to drive the synchronous belt to move. The synchronous belt is connected to the clamp assembly to drive the clamp assembly to slide along the slide shaft. And the clamp assembly is configured to clamp the sheet-type medium stack at the bundling position and convey the sheet-type medium stack to the bundling mechanism. 
         [0016]    Particularly, a sensor is mounted on the mounting frame for detecting an initial position of the clamp assembly. The sensor facilitates the control of the sheet-type medium bundling device according to the present application. 
         [0017]    Particularly, the clamp assembly includes: a sliding block slidably mounted on the slide shaft and fixedly connected to the synchronous belt; a clamping frame fixedly connected to the sliding block; an upper clamping plate and a lower clamping plate, each of which being elastically connected to the clamping frame and can rotate about a rotary shaft; and a guiding plate, one end of the guiding plate being fixedly mounted on the mounting frame, and the other end of the guiding plate being formed with a guiding head having a guiding inclined surface. Two limiting sliding blocks are correspondingly mounted on the opposite surfaces of the upper clamping plate and the lower clamping plate. The guiding plate guides, via the guiding head, the upper clamping plate and the lower clamping plate to open and is supported in an angle formed by the two limiting sliding blocks. During the clamping and conveying of the sheet-type medium stack, the synchronous belt drives the upper clamping plate and the lower clamping plate to move towards the bundling position through the sliding blocks. After a certain distance, the two limiting sliding blocks are disengaged from the guiding plate, such that the upper clamping plate and the lower clamping are rotated towards each other under the elastic forces, thereby clamping the sheet-type medium stack. When releasing the sheet-type medium stack, the synchronous belt drives the upper clamping plate and the lower clamping plate to move towards the mounting frame along the slide shaft, such that the two limiting sliding blocks slide along the guiding inclined surface of the guiding head, thereby the upper clamping plate and the lower clamping plate are gradually opened. 
         [0018]    Further, each stacking plate is provided with a groove, and the ends of the upper clamping plate and the lower clamping plate are bent towards directions of the grooves to form an upper clamping block and a lower clamping block opposite to each other. The groove is configured for providing a space for the clamp assembly to clamp or release the sheet-type mediums. 
         [0019]    Further, a supporting plate is provided perpendicularly between the upper clamping plate and the lower clamping plate, and the supporting plate can rotate about a rotary shaft and is elastically mounted on the upper clamping pate. A blocking plate is mounted at a position corresponding to the supporting plate, and the blocking plate can rotate about a rotary shaft and is elastically connected to the frame. When the clamp assembly is moved along the slide shaft, the supporting plate collides with the blocking plate until the supporting plate is rotated and is disengaged from the lower clamping plate. After the limiting sliding blocks on the upper clamping plate and the lower clamping plate are disengaged from the guiding plate, the upper clamping plate and the lower clamping plate are maintained in an open state by the supporting assembly. When the upper clamping plate and the lower clamping plate are moved to a position to performing the clamping operation, the supporting plate collides with the blocking plate, and is rotated and thus disengaged from the lower clamp plate under the blocking of the blocking plate. At this time, the upper clamping plate and the lower clamping plate lose the supporting of the supporting plate, thereby clamping the sheet-type medium stack instantly, to prevent the sheet-type mediums from being deformed by the upper clamping plate and the lower clamping plate. 
         [0020]    Further, the two limiting sliding blocks form a guiding angle cooperating with the guiding head. The guiding angle is designed to facilitate the opening of the upper clamping plate and the lower clamping plate when the clamp assembly is restored to its original position (that is, being located at a left side of the bundling position). 
         [0021]    Compared with the prior art, the sheet-type medium bundling device of the present application achieves a cooperative operation of stacking and bundling of the sheet-type mediums by utilizing the position switching mechanism, and connects the stacking position with the bundling position through rotations of the stacking plates of the position switching mechanism, thereby finishing the switching between the stacking and the bundling operations of the sheet-type medium and achieving a parallel performing of the operations, which not only reduces the total time required for processing a stack of the sheet-type mediums and increase the operation efficiency, but greatly saved the space occupied by the present application. On one hand, the stacking plates are evenly provided on the power shaft, and after each position switching, two of the stacking plates are respectively located at the stacking position and the bundling position, such that the stacking and the bundling operations of the sheet-type mediums can be performed simultaneously, thereby effectively increasing the operation efficiency of the sheet-type medium bundling device. On the other hand, after completing the collection of the sheet-type mediums by the stacking plate at the stacking position, the stacking plate having completed the collection can be switched to the bundling position as long as the power shaft is rotated, thereby can achieve a repeated circulation of the stacking plate between the stacking position and the bundling position, which can solve the problem that the system is complicated and occupies too much space due to the long distance between the stacking position and the bundling position in the prior art, and can save the space. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]      FIG. 1  is a perspective view of a sheet-type medium bundling device according to the present application; 
           [0023]      FIG. 2  is a top view of a sheet-type medium bundling device according to the present application; 
           [0024]      FIG. 3  is a perspective view of a sheet-type medium bundling device according to the present application with a left side plate being removed; 
           [0025]      FIG. 4  is a perspective view of a position switching mechanism according to the present application; 
           [0026]      FIG. 5  is a side view of a position switching mechanism according to the present application; 
           [0027]      FIG. 6  is a front view of a clamping and conveying mechanism according to the present application; 
           [0028]      FIG. 7  is a perspective view of a clamp assembly according to the present application; 
           [0029]      FIG. 8  is a sectional view of the clamp assembly taken along line A-A in  FIG. 7 ; and 
           [0030]      FIGS. 9   a - 9   h  are operation schematic diagrams of the sheet-type medium bundling device according to the present application. 
       
    
    
     DETAILED DESCRIPTION 
       [0031]    Hereinafter, the embodiments will be described in detail in conjunction with the drawings to describe the technical disclosure, the structural characteristics, and the effects and the object to be achieved. 
         [0032]    Referring to  FIG. 1  to  FIG. 5 , a sheet-type medium bundling device  100  according to the present application is configured for a cooperative operation of stacking and bundling of sheet-type mediums. The sheet-type medium bundling device  100  includes: a conveying passage  11 , a bundling mechanism  13 ; a stacking position  61  formed at an end of the conveying passage  11  and configured for the stacking of the sheet-type mediums, a bundling position  62  formed at a position corresponding to the bundling mechanism  13  for the bundling of the sheet-type mediums, and a position switching mechanism  14  which connects the stacking position  61  with the bundling position  62 . The position switching mechanism  14  includes a power shall  41  and at least two stacking plates mounted on the power shaft  41 . The power shaft  41  is connected to an output shaft of a motor and is driven, by the motor, to rotate. The at least two stacking plates are evenly provided on the power shaft  41 , and when one of the stacking plates is located at the stacking position  61 , another one of the stacking plates correspondingly is located at the bundling position  62 . In operating (it is preset that the stacking plate  51  is located at the stacking position  61 ), every single sheet of sheet-type medium is conveyed to the stacking plate  51  at the stacking position  61  by the conveying mechanism  11 , and is collected by the stacking plate  51 . When the amount of the sheet-type mediums to be stacked reaches to a limit value, the power shaft  41  drives the stacking plates to switch the positions of the stacking plates. After the position switching, the stacking plate  51  is switched to a downstream position, and a stacking plate, which is located upstream of the stacking plate  51 , is rotated to the stacking position  61  for the stacking operation. The stacking plate  51  or a stacking plate located downstream of the stacking plate  51  and carries a sheet-type medium stack  200  is moved to the bundling position  62  for the bundling operation and so on. Thereby finishing the switch between the stacking and the bundling of the sheet-type mediums, which achieves the parallel operation of stacking and bundling, increases the operation efficiency and saves the occupied space. 
         [0033]    Preferably, referring to  FIG. 4  and  FIG. 5 , the power shaft  41  is provided with a mounting shaft sleeve  42 , and the stacking plates are fixedly mounted on the mounting shaft sleeve  42 . Each stacking plate is of a “U” shape or a “V” shape and is opened towards outside. Each stacking plate includes a guiding surface  452  located upstream of the power shaft  41  and a stacking surface  451  located downstream of the power shaft  41 . An end of the guiding surface  452  is bent towards an upstream direction of the power shaft  41  such that the guiding surface  452  at the stacking position  61  is contiguous with the end of the conveying passage  11 , thereby guiding every sheet of sheet-type medium out of the conveying passage  11  to stack the sheet-type mediums on the stacking surface  451  at the stacking position  61 . During the position switching, the power shaft  41  is rotated, by the motor, in a direction of an arrow shown in the  FIG. 5 , the power shaft  41  in turn drives the mounting shaft sleeve  42  to rotate together, and the mounting shaft sleeve  42  rotates each stacking plate to a next position. 
         [0034]    Preferably, referring to  FIG. 4  and  FIG. 5 , a code disc  43  is mounted at an end of the power shaft  41 , and the code disc is provided thereon with notches  431  corresponding to the stacking plates. A sensor  44  for sensing the information of the notches  431  is mounted at a position corresponding to the code disc  43 . During the position switching, the code disc  43  rotates with the power shaft  41 , and the sensor  44  determines the specific state of the position switching by detecting the information of the notches  431 . 
         [0035]    Preferably, referring to  FIG. 4  and  FIG. 5 , in the present embodiment, six stacking plates are provided, and the six stacking plates  51 ,  52 ,  53 ,  54 ,  55  and  56  are evenly provided on the mounting shaft sleeve  42  in an axial direction of the power shaft  41 . The stacking position  61  and the bundling position  62  correspond to two adjacent stacking plates, respectively. Referring to in an initial state, the stacking plate  51  is located at the stacking position  61 , the stacking plate  52  is located at the bundling position, and a falling position  63  is located downstream of the stacking plate  52 . Although the number of the stacking plates may be two or more, preferably, four or more than four stacking plates are provided to ensure the stability of the conveying of the stack of sheet-type mediums  200  on the stacking plate. Further, in order to simplify the structure of the present application and facilitate the arrangement, it is proper that the number of the stacking plates is 4 to 8, and it is optimal that the number of the stacking plate is 6. 
         [0036]    Referring to  FIG. 3 , the falling position  63  for the output of the sheet-type mediums is formed downstream of the bundling position  62 , and a falling plate  16  is obliquely mounted at the falling position  63 . Furthermore, each stacking plate is provided with a groove  453 , and one end of the falling plate  16  extends towards a direction of the groove  453  to form a corresponding blocking arm  161 . The blocking arm  161  guides the sheet-type medium stack  200  on the stacking plate such that the sheet-type medium stack falls onto the falling plate  16 . The other end of the falling plate  16  corresponds to the position of a container  15  to guide the sheet-type medium stack  200  on the falling plate  16  to slide into the container  15  along the inclined plate surface. 
         [0037]    Referring to  FIG. 1  to  FIG. 3 , a long side arranging mechanism (not shown) is mounted at a position corresponding to the stacking position  61 , a short side arranging mechanism (not shown) is mounted at a position corresponding to the bundling position  62 , and a clamping and conveying mechanism  12  and the bundling mechanism  13  are mounted at positions corresponding to the bundling position  62 . 
         [0038]    Referring to  FIG. 1  to  FIG. 3 , the clamping and conveying mechanism  12  is mounted at the position corresponding to the bundling position  62 . The arranging mechanisms (not shown), the conveying passage  11 , the clamping and conveying mechanism  12 , the bundling mechanism  13 , the position switching mechanism  14 , the container  15  and the falling plate  16  are all mounted on a frame  101 . The conveying passage  11  is configured for conveying every single sheet of sheet-type medium to a stacking plate at the stacking position  61 . The long side arranging mechanism and the short side arranging mechanism are configured for arranging the long side and the short side of the sheet-type medium stack on the stacking plate. The clamping and conveying mechanism  12  is configured for clamping the arranged sheet-type medium stack  200  and conveying them to the bundling mechanism  13 . The bundling mechanism  13  is configured for the bundling of the sheet-type medium stack  200 . The falling plate  16  is configured for unloading the bundled sheet-type medium stack  200  from the stacking plate. The container  15  is configured for storing the bundled sheet-type medium stack  200 . And the position switching mechanism  14  is configured for circulating each stacking plate through the stacking position  61 , the bundling position  62  and the falling position  63  successively and repeatedly, thereby achieving the successive switching of four different operations, that is, the stacking, the arranging, the bundling and the falling operations, of the sheet-type mediums. 
         [0039]    Referring to  FIG. 1  and  FIG. 2 , the frame  101  includes a left side plate  102  and a right side plate  103  located at two sides of the position switching mechanism  14 , and a mounting frame  104  is mounted at an outer side of the left side plate  102 . 
         [0040]    Particularly, referring to  FIG. 1  to  FIG. 2  and  FIG. 6  to  FIG. 8 , the clamping and conveying mechanism  12  includes a motor (not shown), a synchronous belt  21 , a slide shaft  22  and a clamp assembly  23 . The slide shaft  22  is parallel to a stacking plate at the bundling position  62 , and one end of the slide shaft  22  is mounted on the mounting frame  104 , the other end of the slide shaft  22  passes through the lift side plate  102  and is mounted on a fixing frame at the right side of the position switching mechanism  14 . The clamp assembly  23  is slidably mounted on the slide shaft  22  and corresponds to the position of the bundling mechanism  13 . The mounting frame  104  is fit with a sensor  105  for detecting an initial position of the clamp assembly  23 . In operating, the motor is connected to the synchronous belt  21  and drives the synchronous belt  21  to move. The synchronous belt  21  is fixedly connected to the clamp assembly  23  and drives the clamp assembly  23  to slide at the bundling position  62  along the slide shaft  22 . The clamp assembly  23  clamps a sheet-type medium stack  200  on a stacking surface  451  at the bundling position  62 . The synchronous belt  21  conveys the clamped sheet-type medium stack  200  to the bundling mechanism  13  and conveys the bundled sheet-type medium stack  200  back to the position of the sheet-type medium stack  200  before being clamped. The bundling position  62  is in a horizontal state for facilitating the clamping and conveying and the bundling of the sheet-type medium. 
         [0041]    More particularly, referring to  FIG. 6  to  FIG. 8 , the clamp assembly  23  includes: a sliding block  31  slidably mounted on the slide shaft  22  and fixedly connected to the synchronous belt  21 , a clamping frame  32  fixedly connected to the sliding block  31 , an upper clamping plate  33  which can rotate about a rotary shaft and is elastically connected to the clamping frame  32  is an elastic element  35 , a lower clamping plate  34  which can rotate about a rotary shaft and is elastically connected to the clamping frame  32  via an elastic element  36 , and a guiding plate  37 . One end of the guiding plate  37  is fixedly mounted on the mounting frame  104 , and the other end of the guiding plate  37  is formed with a guiding head with a guiding inclined surface. Two limiting sliding blocks  38  are correspondingly mounted on the opposite surfaces of the upper clamping plate  33  and the lower clamping plate  34 . The guiding plate guides, via the guiding head, the upper clamping plate  33  and the lower clamping plate  34  to open and is supported by the two limiting sliding blocks  38  forming an angle. During the clamping and conveying of the sheet-type medium stack  200 , the synchronous belt  21  drives the clamping frame  32  of the clamp assembly  23  to slide rightwards along the slide shaft  22 , and the upper clamping plate  33  and the lower clamping plate  34  are driven to move towards the bundling position  62  together with the clamping frame. When the limiting sliding blocks  38  is disengaged from the guiding plate  37 , the upper clamping plate  33  and the lower clamping plate  34  rotate towards each other under the actions of the elastic elements  35  and  36 , such that the clamp assembly  23  clamps the sheet-type medium stack  200  (referring to  FIG. 9   e ). When releasing the sheet-type medium stack  200 , the synchronous belt  21  drives the upper clamping plate  33  and the lower clamping plate  34  to move towards the mounting frame  104  along the slide shaft  22 , and the two limiting sliding blocks  38  are driven to slide along the guiding inclined surface of the guiding head, such that the upper clamping plate  33  and the lower clamping plate  34  are gradually opened to release the sheet-type medium stack  200  (referring to  FIG. 9   g ). 
         [0042]    Preferably, ends of the upper clamping plate  33  and the lower clamping plate  34  are bent towards directions of the grooves  453 , to form an upper clamping block  331  and a lower clamping block  341  opposite to each other. 
         [0043]    Preferably, a guiding angle is formed between the two limiting sliding blocks  38 . The guiding angle is formed to cooperate with the guiding head and is opened towards the clamping frame  32 . When releasing the sheet-type medium stack  200 , two inclined surfaces of the guiding angle slide along the guiding inclined surface of the guiding head, such that the upper clamping plate  33  and the lower clamping plate  34  are gradually opened, thereby releasing the sheet-type medium stack  200 . 
         [0044]    Preferably, a supporting plate  24  is perpendicularly provided between the upper clamping plate  33  and the lower clamping plate  34 . The supporting plate  24  can rotate about a rotary shaft and is elastically mounted to the upper clamping plate  33  via an elastic element  25 . A blocking plate  26  is provided at a position corresponding to the supporting plate  24 . The blocking plate  26  can rotate about a rotary shaft and is elastically connected to the frame  101  via an elastic element  27 . When the clamp assembly  23  moves towards the bundling mechanism  13 , the limiting sliding blocks  38  are disengaged from the guiding plate  37 , and the upper clamping plate  33  and the lower clamping plate  34  are maintained in the open state under the action of the supporting plate  24 . When the upper clamping block  331  and the lower clamping block  341  at the ends of the upper clamping plate  33  and the lower clamping plate  34  enter the ranges of the grooves  453  of the stacking plates  51 ,  52 ,  53 ,  54 ,  55 ,  56 , the supporting plate  24  collides with the blocking plate  26 , such that the supporting pate  24  is rotated under the blocking action of the blocking plate  26  and is disengaged from the lower clamping plate  34 . At this time, the upper clamping plate  33  and the lower clamping plate  34  lose the supporting of the supporting pate  24 , thereby closely clamping the sheet-type mediums stack instantly under the actions of the elastic elements  35  and  36 , to prevent the sheet-type mediums from being deformed by the upper clamping plate  33  and the lower clamping plate  34 . When the clamp assembly  23  moves in a direction away from the bundling mechanism  13 , the blocking plate  26  rotates such that, with the opening of the upper clamping plate  33  and the lower clamping plate  34 , the supporting plate  24  is rotated under the restoring force of the elastic member  25  and thus supports the upper clamping plate  33  and the lower clamping plate  34 . 
         [0045]    Referring to  FIG. 9   a  to  FIG. 9   h , the operation processes of stacking, arranging, bundling, and outputting the sheet-type medium by the sheet-type medium bundling device  100  of the present application will be described in detail. Referring to  FIG. 9   a , in an initial state, the stacking plate  51  is located at the stacking position  61 , the stacking plate  52  is located at the bundling position  62 , and the falling position  63  is located downstream of the stacking plate  52 . The present application includes the following steps: 
         [0046]    Referring to  FIG. 9   a , every single sheet of sheet-type medium is conveyed by the conveying passage  11  to the stacking plate  51  at the stacking position  61  and is stacked on the stacking plate  51 . Meanwhile, the long side arranging mechanism is extended to the stacking position  61  to perform the flapping and arranging operation. When the amount of the sheet-type mediums to be stacked reaches to a limit value and forms a sheet-type medium stack  200 , a corresponding control system sends a signal such that the conveying passages stop conveying the sheet-type medium and the long side arranging mechanism returns to its original position. 
         [0047]    Referring to  FIG. 9   b , when the sheet-type medium stack  200  is stacked by the stacking plate  51  at the stacking position  61 , the position switching mechanism  14  is rotated clockwise to switch each stacking plate to a next position, such that the stacking plate  51  at the stacking position  61  is moved to the bundling position  62 , the stacking plate  56  is moved to the stacking position  61 , and the stacking plate  52  is moved to an original position of the stacking plate  53  after passing the blocking arm  161  of the falling plate  16 , thereby the position switching operation is completed. 
         [0048]    After the position switching operation is completed, the conveying passage  11  continues to convey the sheet-type mediums which are then collected by the stacking plate  56 . At the same time, referring to  FIG. 9   c  to  FIG. 9   g , the short side arranging mechanism is extended to flap and arrange the sheet-type medium stack  200 . Then the sheet-type mediums stack  200  is clamped by the clamp assembly  23  of the clamping and conveying mechanism  12  and is conveyed to the bundling mechanism  13  through the opening in the right side plate  103 . After being bundled, the sheet-type medium stack  200  is pulled back, by the clamp assembly  23  of the clamping and conveying mechanism  12 , to its original position before being clamped. Hereinafter, the operation process of the clamping and conveying mechanism  12  will be described in detail, including the following steps: 
         [0049]    (1) Referring to  FIG. 9   c , before receiving a signal indicating that the position switching has been completed from the sensor  44 , the clamp assembly  23  stays at the left side of the left side plate  102 . At this time, the limiting sliding blocks  38  and the supporting plate  24  cooperates to maintain the opening state of the upper clamping plate  33  and the lower clamping plate  34 . 
         [0050]    (2) Referring to  FIG. 9   d , after the sheet-type medium stack  200  has been flapped and arranged by the short side arranging mechanism, the control system sends a signal to activate the clamping and conveying mechanism  12 . Then the clamp assembly  23  is moved rightwards along the slide shaft  22 . When the limiting sliding blocks  38  is disengaged from the guiding plate  37 , the upper clamping plate  33  and the lower clamping plate  34  are supported by the supporting plate  24 , thus being maintained in the opening state. 
         [0051]    (3) Referring to  FIG. 9   e , when the upper clamping block  331  and the lower clamping block  341  enter the range of the groove  453  of the stacking plate  51 , the supporting plate  24  is blocked by the blocking plate  26  and is rotated clockwise, such that the upper clamping plate  33  and the lower clamping plate  34  lose the supporting of the supporting plate, thereby clamping the sheet-type medium stack  200  instantly. 
         [0052]    (4) Referring to  FIG. 9   f , the clamp assembly  23  continues to slide rightwards, the upper clamping plate  33  and the lower clamping plate  34  clamp the sheet-type medium stack  200  and convey the sheet-type medium stack  200  to the bundling mechanism  13  along the surface of the stacking plate  51 . 
         [0053]    (5) Referring to  FIG. 9   g , after the sheet-type medium stack  200  has been bundled, the clamping and conveying mechanism  12  receives an instruction from the control system to control the synchronous belt  21  to rotate reversely, such that the clamp assembly  23  pulls the sheet-type mediums stack  200  to move reversely. When the supporting plate  24  collides with the blocking plate  26 , the blocking plate  26  is rotated counterclockwise to make out of the way. When the upper clamping block  331  and the lower clamping block  341  enter the groove  453  of the stacking plate  51 , the limiting sliding blocks  38  slide along the inclined surface of the guiding head of the guiding plate  37 , such that the upper clamping plate  33  and the lower clamping plate  34  are gradually opened, the supporting plate  24  is restored under the action of the elastic element  25 , thereby supporting the upper clamping plate  33  and the lower clamping plate  34 . 
         [0054]    (6) When the upper clamping plate  33  and the lower clamping plate  34  are opened, the sheet-type medium stack  200  stays on the stacking plate  51  because of losing of the pulling force. The clamp assembly  23  continues to slide leftwards. When the clamp assembly  23  triggers the sensor  105 , the control system sends a signal to stop the synchronous belt  21  of the clamping and conveying mechanism  12 . At this time, the bundled sheet-type medium stack  200  stays on the stacking plate  51 , and sheet-type mediums are continuously stacked by the stacking plate  56 . 
         [0055]    Referring to  FIG. 9   h , when the amount of the sheet-type mediums collected by the stacking plate  56  reaches to the limit value and forms a sheet-type medium stack  200 , the position switching mechanism  14  is rotated clockwise again to perform the position switching, the sheet-type medium stack  200  on the stacking plate  51  is rotated together and contacts with the falling plate  16 . Under the action of the blocking arm  161  of the falling plate  16 , the sheet-type medium stack  200  falls onto the falling plate  16  and slides into the container  15  under the guiding of the falling plate  16 . Meanwhile, the sheet-type medium stack  200  on the stacking plate  56  is conveyed to the bundling position  62 , for the flapping and arranging operation by the short side arranging mechanism, the clamping and conveying, the bundling and the pulling back operations, and the stacking plate  55  is switched to the stacking position  61  to continue to collect the sheet-type mediums conveyed by the conveying passage  11 . 
         [0056]    The above-mentioned operations are repeated, thereby performing the stacking, the arranging, the bundling and the falling operations of the sheet-type mediums continuously. 
         [0057]    The conveying passage  11  is stopped only when the position switching mechanism  14  performs the position switching operation, which lasts about 0.5 s. When the position switching mechanism  14  begins the position switching, at least two of the stacking, the arranging and the bundling operation are performed synchronously. For example, in  FIG. 9   b , while the sheet-type medium stack  200  on the stacking plate  51  at the stacking position  61  is conveyed to the bundling position  62 , the stacking plate  56  is switched to the stacking position. After the position switching is completed, the stacking of the sheet-type mediums on the stacking plate  56  are performed together with the flapping and arranging, the clamping and conveying, the bundling and the pulling back operations of the stack of sheet-type mediums  200  on the stacking plate  51  synchronously. In  FIG. 9   h , the stack of sheet-type mediums  200  on the stacking plate  51  is conveyed into the container  15 . At the same time, the sheet-type medium stack  200  on the stacking plate  56  is conveyed to the bundling position  62  by the clamping and conveying mechanism  12 , and the stacking plate  55  is switched to the stacking position  61 . At this time, the stacking plate  55  is collecting the sheet-type mediums, and the flapping and arranging, the clamping and conveying, the bundling, and the pulling back of the sheet-type medium stack  200  on the stacking plate  56  are also being performed. Therefore, when the position switching mechanism  14  in the sheet-type medium bundling device  100  is performing or has completed the position switching operation, at least two of the of the stacking, the bundling, and the falling of the sheet-type mediums are performed synchronously, which increases the operation efficiency of the present application. The time required for processing a stack of sheet-type mediums is determined by the one of the three positions requiring the longest time. For example, the time required for collecting 100 pieces of sheet-type mediums is T1, the time required for the operation at the bundling position  62  is T3, and it takes no time at the container  105 , the sheet-type medium stack fall into the container when the position switching operation is completed. Thereby the total time period is the time for collecting the sheet-type mediums, that is, T1. 
         [0058]    To sum up, the sheet-type medium bundling device  100  according to the present application can achieve a repeated circulation of the stacking plates at the stacking position  61 , the bundling position  62  and the falling position  63  by virtue of the position switching of the position switching mechanism  14 , and thus can achieve the successively switching of the stacking, the arranging, the bundling and the falling operations of the sheet-type mediums, thereby achieving the parallel performing of the operations, which not only reduces the time required for processing the sheet-type mediums, but increases the operation efficiency, simplifies the structure, and saves the occupied space. 
         [0059]    The above embodiments are merely the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Accordingly, any equivalent variation made within the protection scope of the present application should be deemed to fall into the protection scope of the present application.