Abstract:
A locking apparatus for locking a magazine configured to receive a printed circuit board (PCB) may include an actuator, a rotating block, and a locking member. The actuator may be installed on the magazine. The rotating block may be connected to the actuator. The rotating block may be rotated about a vertical axis. The locking member may be rotatably connected to the magazine about the vertical axis. The locking member may be selectively combined with the rotating block to block a front face of the magazine, thereby preventing breakaway of the PCB from the magazine.

Description:
[0001]    CROSS-RELATED APPLICATION 
         [0002]    This application claims priority under 35 USC §119 to Korean Patent Application No. 2009-77064, filed on Aug. 20, 2009 in the Korean Intellectual Property Office (KIPO), the contents of which are herein incorporated by reference in their entirety. 
       BACKGROUND 
       [0003]    1. Field of the Invention 
         [0004]    Exemplary embodiments of the invention are directed to an apparatus for locking a magazine. More particularly, exemplary embodiments of the invention are directed to an apparatus for preventing a printed circuit board (PCB) in a magazine from breaking away. 
         [0005]    2. Description of the Related Art 
         [0006]    In general, various kinds of semiconductor packages may be mounted on a printed circuit board (PCB). Thus, during manufacture, the PCBs may need to be transported to various unit processes. The PCBs may be transported using a magazine. 
         [0007]    A conventional magazine may include a rectangular magazine body, a plurality of supporting members formed at inner surfaces of the magazine body to support the PCBs, and an apparatus for locking the PCBs to prevent breakaway of the PCBs from the supporting members while the magazine body is being transported. 
         [0008]    The conventional locking apparatus may include a locking bar rotatably connected to the magazine body about a vertical axis. A worker may manually rotate the locking bar to lock the PCBs. 
         [0009]    However, if a worker fails to rotate the locking bar due to carelessness while transporting the PCBs, the PCBs may fall off from the magazine, possibibly damaging the expensive PCBs. 
         [0010]    In contrast, when unloading the PCBs from the magazine without releasing the locking bar, the PCBs may collide with the locking bar, also possibly damaging the expensive PCBs. 
         [0011]    Further, if the magazine is impacted while waiting to be processed when the locking bar is unlocked, the PCBs may collide witht the locking bar. 
       SUMMARY OF THE INVENTION 
       [0012]    Exemplary embodiments provide an apparatus for locking a magazine that may be capable of preventing damages of a PCB. 
         [0013]    According to some exemplary embodiments, there is provided an apparatus for locking a magazine. The locking apparatus may include an actuator, a rotating block, and a locking member. The actuator may be installed on the magazine. The magazine is configured to receive a printed circuit board (PCB). The rotating block may be connected to the actuator. The rotating block may be rotated about a vertical axis. The locking member may be rotatably connected to the magazine about the vertical axis. The locking member may be selectively combined with the rotating block to block a front face of the magazine, thereby preventing breakaway of the PCB from the magazine. 
         [0014]    In some exemplary embodiments, the actuator may include a rotating cylinder installed on the magazine, a rack connected to the rotating cylinder and linearly movable along a horizontal axis, and a pinion meshed with the rack and connected to the locking member to transmit a rotational movement about the vertical axis to the locking member from the linear movement of the rack. 
         [0015]    In some exemplary embodiments, the rotating block may have a receiving groove configured to receive an upper end of the locking member. 
         [0016]    In some exemplary embodiments, the locking apparatus may further include a sensor for sensing the presence of a PCB in the magazine, to control operations of the actuator. 
         [0017]    In some exemplary embodiments, the locking apparatus may further include a lifting unit installed on the magazine to lift the actuator along the vertical axis. 
         [0018]    In some exemplary embodiments, the lifting unit may include a lifting cylinder mounted on the magazine along the vertical axis, and a lifting block between the lifting cylinder and the actuator. 
         [0019]    In some exemplary embodiments, the lifting block may have one or more adjusting grooves, each configured to receive an adjusting screw to adjust positions of the actuator. 
         [0020]    In some exemplary embodiments, the locking apparatus may further include an absorbing spring installed around the locking block to absorb a contact impact between the magazine and the rotating block. 
         [0021]    According to some exemplary embodiments, there is provided an apparatus for locking a magazine configured to receive a printed circuit board (PCB). The locking apparatus may include an actuator having a pair of rotating cylinders, a pair of rotating blocks, and a pair of locking members. The rotating cylinders may be arranged at both sides of the magazine along a horizontal axis. The rotating blocks may be connected to the rotating cylinders. The rotating blocks may be rotated about a vertical axis. The locking members may be rotatably connected to the magazine about the vertical axis. Each of the locking members may be selectively combined with one of the rotating blocks to block a front face of the magazine, thereby preventing breakaway of the PCB from the magazine. 
         [0022]    In some exemplary embodiments, the locking apparatus may further include a lifting unit installed on the magazine and connected to the actuator. The lifting unit may lift the actuator along the vertical axis 
         [0023]    In some exemplary embodiments, the locking apparatus may further include a pair of sensors. Each sensor is attached to one of the rotating blocks. The sensors may detect the presence of a PCB in the magazine. 
         [0024]    In some exemplary embodiments, the locking apparatus may further include a pair of absorbing springs. Each absorbing spring is disposed around one of the rotating blocks to absorb a contact impact between the magazine and the rotating block. 
         [0025]    According to some exemplary embodiments, there is provided an apparatus for locking a magazine, the magazine being adapted for receiving a plurality of substrates. The apparatus may include a locking member, a rotating block, and a sensor. The locking member is rotatably connected to the magazine with respect to a vertical axis. The rotating block is rotatable about a vertical axis and has a receiving groove configured to receive an upper end of the locking member. The sensor is attached to the rotating block to detect a substrate in the magazine. The locking member may selectively block the front face of the magazine in response to a detection signal of the sensor. Thus, the PCB may be prevented from breaking away and colliding with the locking member. 
         [0026]    In some exemplary embodiments, the locking apparatus includes an actuator connected to the rotating block, and a lifting unit installed on the magazine to lift the actuator along the vertical axis. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]      FIG. 1  is a front view illustrating an apparatus for locking a magazine in accordance with an exemplary embodiment of the invention. 
           [0028]      FIG. 2  is a plan view illustrating the locking apparatus in  FIG. 1 . 
           [0029]      FIG. 3  is a plan view illustrating a left actuator of the locking apparatus in  FIG. 1 . 
           [0030]      FIG. 4  is a plan view illustrating a right actuator of the locking apparatus in  FIG. 1 . 
           [0031]      FIG. 5  is a cross-sectional view illustrating a rotating block and a locking member of the locking apparatus in  FIG. 1 . 
           [0032]      FIGS. 6 and 7  are front views illustrating locking operations of the locking apparatus in  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0033]    Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the example embodiments set forth herein. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. 
         [0034]    It will be understood that when an element or layer is referred to as being “on,” “connected to” or “coupled to” another element or layer, it can be directly on, connected or coupled to the other element or layer or intervening elements or layers may be present. Like numerals refer to like elements throughout. 
         [0035]    Hereinafter, exemplary embodiments will be explained in detail with reference to the accompanying drawings. 
         [0036]      FIG. 1  is a front view illustrating an apparatus for locking a magazine in accordance with an exemplary embodiment of the invention,  FIG. 2  is a plan view illustrating the locking apparatus in  FIG. 1 ,  FIG. 3  is a plan view illustrating a left actuator of the locking apparatus in  FIG. 1 ,  FIG. 4  is a plan view illustrating a right actuator of the locking apparatus in  FIG. 1 ,  FIG. 5  is a cross-sectional view illustrating a rotating block and a locking member of the locking apparatus in  FIG. 1 , and  FIGS. 6 and 7  are front views illustrating locking operations of the locking apparatus in  FIG. 1 . 
         [0037]    Referring to  FIGS. 1 and 2 , a locking apparatus  100  of this exemplary embodiment may include a lifting unit  110 , a pair of actuators  120 , a rotating block  130  and a locking member  140 . 
         [0038]    The lifting unit  110  may be mounted on an upper central surface of a magazine M. In some exemplary embodiments, the magazine M may be configured to receive a plurality of substrates such as PCBs. A plurality of supporting members may be horizontally formed on both inner surfaces of the magazine M. Thus, the substrates may be horizontally inserted into between the supporting members. 
         [0039]    In some exemplary embodiments, the lifting unit  110  may include a lifting cylinder  112  and a lifting block  114 . The lifting cylinder  112  may be installed on the upper central surface of the magazine M along a vertical axis. The lifting block  114  may be connected to the lifting cylinder  112 . Thus, the lifting cylinder  112  may lift the lifting block  114 . The lifting block  114  may extend to both ends of the magazine M along the horizontal direction. 
         [0040]    First adjusting grooves  116  may be formed on the lifting block  114  along a first horizontal direction. Second adjusting grooves  117  may be formed on the lifting block  114  along a second horizontal direction substantially perpendicular to the first horizontal direction. Adjusting screws  118  may be threadedly inserted into the first adjusting grooves  116  and the second adjusting grooves  117  to connect the lifting block  114  with the actuator  120 . Thus, positions of the actuators  120  along the first horizontal direction and the second horizontal direction may be adjusted to the sizes of the magazine M by the insert positions of the adjusting screws  118 . 
         [0041]    The actuators  120  may be connected to the lifting block  114  via the adjusting screws  118 . The actuators  120  may include a left driving unit (not shown) and a right driving unit (not shown). The left driving unit may have a structure substantially the same as that of the right driving unit. 
         [0042]    Referring to  FIGS. 3 and 4 , each of the actuators  120  may include a rotating cylinder  122 , a rack  124  and a pinion  126 . 
         [0043]    The rotating cylinder  122  may be fixed to the lifting block  114  via the adjusting screws  118 . The rotating cylinder  122  may be arranged along the horizontal axis of the actuators  120 . The rotating cylinder  122  may have a rod  123  extending toward an outside of the magazine M. 
         [0044]    The rack  124  may be connected to the rod  123  of the rotating cylinder  122 . The rack  124  may move linearly along the horizontal direction. The pinion  126  may mesh with the rack  124 . Thus, linear movement of the rack  124  may be converted into a rotational movement of the pinion  126  about the vertical axis. 
         [0045]    The rotating block  130  may be connected to the pinion  126 . Therefore, the rotating block  130  may rotate together with the pinion  126  about the vertical axis. In some exemplary embodiments, the rotating block  130  may have a long cylindrical shape. 
         [0046]    Referring to  FIG. 5 , the rotating block  130  may have a receiving groove  132  configured to receive an upper end of the locking member  140 . In some exemplary embodiments, the receiving groove  132  may be formed at a lower surface of the rotating block  130 . Because the upper end of the locking member  140  may have a long bar shape, the receiving groove  132  may also have a shape corresponding to the long bar shape. That is, the shape of the receive groove  132  may vary in accordance with the shape of the upper end of the locking member  140 . 
         [0047]    Referring again to  FIGS. 1 and 2 , the locking member  140  may be rotatably connected to both sides of the magazine M. The locking member  140  may be selectively inserted into the receiving groove  132  of the rotating block  130 . Thus, the locking member  140  may rotate together with the rotating block  130  to selectively block a front face of the magazine M through which the substrates may otherwise be loaded and unloaded. 
         [0048]    A sensor  150  may be attached to the rotating block  130 . The sensor  150  may detect a substrate to control operations of the lifting unit  110  and the actuator  120 . Alternatively, the sensor  150  may be attached to the magazine M. 
         [0049]    In addition, when the rotating block  130  descends to be combined with the locking member  140 , the rotating block  130  may make contact with the upper surface of the magazine M. To buffer a contact impact between the rotating block  130  and the magazine M, an absorbing spring  160  may be installed around the rotating block  130 . 
         [0050]    Here, the locking apparatus  100  of this exemplary embodiment may include the lifting unit  110 . However, when the rotating block  130  is permanently fixed to the locking member  140 , the above-mentioned structure is not needed to affect the locking operations of the locking apparatus  100 . Thus, the locking apparatus  100  may exclude the lifting unit  110 . 
         [0051]    Hereinafter, the locking operations of the locking apparatus  100  may be illustrated in detail with reference to  FIGS. 1 ,  6  and  7 . 
         [0052]    Referring to  FIG. 1 , when the magazine M is empty, the locking member  140  may be rotated toward the outside of the magazine M, to open the front face of the magazine M. Further, the lifting unit  110  may lift the actuator  120 . Thus, the rotating block  130  may be separated from the locking member  140 . 
         [0053]    Referring to  FIG. 6 , when substrates are loaded into the magazine M, the sensor  150  detects the substrates in the magazine M and transmits a detection signal to the lifting unit  110 . The lifting unit  110  may lower the lifting block  114 . The actuator  120  descends together with the lifting block  114 . Thus, the rotating block  130  may be combined with the locking member  140 . That is, the upper end of the locking member  140  may be received in the receiving groove  132  of the rotating block  130 . Here, while the rotating block  130  makes contact with the upper surface of the magazine M, the absorbing spring  160  may absorb the contact impact between the rotating block  130  and the magazine M. 
         [0054]    The rotating cylinder  122  may linearly move the rack  124  along the horizontal direction. The pinion  126  may rotate about the vertical axis, to rotate the rotating block  130 . As a result, the locking member  140  combined with the rotating block  130  rotate together with the rotating block  130 , so that the locking member  140  blocks the front face of the magazine M. Therefore, the substrates are prevented from being broken away from the magazine M. 
         [0055]    In contrast, when the substrates are to be unloaded from the magazine M, the rotating cylinder  122  inversely rotates the rack  124 , to inversely rotate the pinion  126 . Thus, the rotating block  130  and the locking member  140  rotate toward the outside of the magazine M, to open the front face of the magazine M. 
         [0056]    The lifting cylinder  112  lifts the lifting block  114  and the actuator  120 , to release the locking member  140  from the receiving groove  132  of the rotating block  130 . 
         [0057]    According to these exemplary embodiments, the locking member may selectively block the front face of the magazine in accordance with a detection signal of the sensor. Thus, the PCBs are prevented from being broken away. Further, the PCBs are prevented from colliding with the locking member. As a result, the locking apparatus may contribute to an automatic distribution system. 
         [0058]    The foregoing is illustrative of various exemplary embodiments and is not to be construed as limiting thereof to the specific exemplary embodiments disclosed. Although a few exemplary embodiments have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings of the embodiments of the present invention. Accordingly, all such modifications are intended to be included within the scope of the embodiments of the present invention as defined in the appended claims.