Abstract:
A connecting mechanism and a foldable container comprising the same. The foldable container comprises a top cover and a chassis. Top corner pieces ( 121 ) are disposed on four corners of the top cover. The top corner pieces are connected to a top cover corner column ( 122 ). Bottom corner pieces ( 111 ) are disposed on four corners of the chassis. The bottom corner pieces are connected to a chassis corner column ( 112 ). The connecting mechanism comprises a lifting lug ( 23 ) disposed on one of the top cover corner column ( 122 ) and the chassis corner column ( 112 ) and a locking plate ( 21 ) rotatably disposed on an outer end surface of the other one of the top cover corner column ( 122 ) and the chassis corner column ( 112 ). The locking plate ( 21 ) is provided with a hook portion fitted to the lifting lug. By means of the connecting mechanism, the top cover and the chassis can be automatically connected when the container is folded; and when the container is assembled, the operation efficiency is high and the inner size of the container is not affected.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is the National Stage of International PCT Application No. PCT/CN2015/083396 filed on Jul. 6, 2015, which claims the benefit of priority to Chinese Patent Application No. 201410640576.4, filed with the State Intellectual Property Office of China on Nov. 13, 2014, each of which is herein incorporated by reference in its entirety. 
     
    
     BACKGROUND 
       [0002]    The present invention relates to the field of container, and especially relates to a connecting mechanism and a collapsible container comprising the same. 
         [0003]    The dry cargo container is a large-scale vessel among the containers that is most widely used and has gotten the largest usage, in which the containers of 20 feet, 40 feet and 40 feet in height obtain the most common application, and the corresponding transport vehicles, ships and handling equipments all have been standardized. The conventional dry cargo container is of a fixed type in its structure, which provides many advantages, such as simple structure, low cost, light weight, high strength, good rigidity, easy maintenance, easy loading and unloading, however, there are also obvious drawbacks. The dry cargo containers often needs to be stacked and temporarily stored in an empty state after its goods is unloaded, but due to the conventional dry cargo container of a fixed structure has a bulky volume, it will take up a lot of storage space, causing a greater storage cost. When transporting goods from one location to another one, there is frequently the transfer of the empty containers, since the conventional dry cargo container of a fixed structure is bulky in its volume, although the weight of an empty container is not large, the truck or container ship has the same loading capacity when transporting the empty container as that when transporting the loaded container, and the loading capacity can not be increased due to the light weight of the empty containers. This makes the transportation cost irreducible, causing a huge wastage. 
         [0004]    As the conventional dry cargo container has the above drawbacks, there exits a high need for the arrangement capable of overcoming the problem of empty container transportation, its leading driving force is to significantly reduce the transportation and storage cost, and its secondary driving force is the environmental issues and the tendency of low-carbon expanding economy. The collapsible container can significantly reduce the empty container transportation expenses and empty container storage cost, thus it has gotten widespread concern around the world and the continued development of many professional corporations. After several decades of endeavors, many forms of collapsible containers have been developed, and a large number of patents have been applied for correspondingly, but so far, there isn&#39;t yet one of them that has been applied in large quantities. The main reason is that the problems brought by the folding functionality of the collapsible container have not been finely solved, primarily: its structural stability, sealability, operability and the like. Therefore, it is necessary to continue the research and development to propose an acceptable solution. 
         [0005]    The mechanized folding and assembling of the containers could save considerable manpower, and also could enormously promote the folding and assembling efficiency, satisfies actual demands when the container is in use, this makes the collapsible container practical, and the customers are more receptive to such a new mode of collapsible containers. However, in prior art, there are still problems in the mechanized folding and assembling aspects of the collapsible container, which needs to propose a new solution. 
       SUMMARY 
       [0006]    In this SUMMARY section, a series of simplified concepts are introduced which will get a further detailed description in the DETAILED DESCRIPTION section. The SUMMARY section of the present invention does not intend to define the critical features and the essential technical features of the claimed technical solution, nor intend to determine the protection reach of the claimed technical solution. 
         [0007]    To overcome the above problems, the present invention discloses a connection mechanism for a collapsible container, the collapsible container comprises a top cover and a chassis, the four corners of the top cover is provided with a top corner piece which is connected with a top cover corner pillar, and the four corners of the chassis is provided with a bottom corner piece which is connected with a chassis corner pillar, characterized in that the connecting mechanism comprises: 
         [0008]    A crook lug located at one of the top cover corner pillar and the chassis corner pillar; and 
         [0009]    A crook locking plate rotatablely provided at the outer end face of the other of the top cover corner pillar and the chassis corner pillar, the first end of the crook locking plate is provided with a crook part cooperating with the crook lug. 
         [0010]    Alternatively, the crook lug extends and protrudes from the outer end face of the one of the top cover corner pillar and the chassis corner pillar. 
         [0011]    Alternatively, the connecting mechanism further comprises a crook locking plate shaft by means of which the crook locking plate is hinged with the other of the top cover corner pillar and the chassis corner pillar. 
         [0012]    Alternatively, the connecting mechanism further comprises an elastic element, one end of which abuts against the outer end face of the other of the top cover corner pillar and the chassis corner pillar and the other end of which abuts against the crook locking plate. 
         [0013]    Alternatively, the crook locking plate is provided with a groove for receiving the elastic element, and the elastic element abuts against the bottom surface of the groove. 
         [0014]    Alternatively, the connecting mechanism further comprises a stopper mechanism detachably connected with the crook locking plate. 
         [0015]    Alternatively, the stopper mechanism is provided at the outer end face of the other of the top cover corner pillar and the chassis corner pillar. 
         [0016]    Alternatively, the stopper mechanism comprises a first stopper and a first stopper shaft, the first end of the first stopper is provided with a hole through which the first stopper shaft passes to be hinged with the other of the top cover corner pillar and the chassis corner pillar, the second end of the first stopper is provided with a stopper crook cooperating with the second end of the crook locking plate. 
         [0017]    Alternatively, at least one of the second end of the crook locking plate and the second end of the first stopper is provided with a first guiding inclined plane. 
         [0018]    Alternatively, the stopper mechanism is provided at the outer end face of the one of the top cover corner pillar and the chassis corner pillar. 
         [0019]    Alternatively, the stopper mechanism comprises a second stopper and a second stopper shaft, the first end of the second stopper is provided with a hole through which the second stopper shaft passes to be hinged with the one of the top cover corner pillar and the chassis corner pillar, the second stopper cooperates with the crook locking plate. 
         [0020]    Alternatively, the connecting mechanism further comprises stop block for restraining the second stopper, and the stop block is provided at the one of the top cover corner pillar and the chassis corner pillar. 
         [0021]    Alternatively, the second end of the second stopper is provided with a handle. 
         [0022]    Alternatively, at least one of the first end of the crook locking plate and the crook lug is provided with a second guiding inclined plane. 
         [0023]    Alternatively, the first end of the crook locking plate is provided with an operating panel laterally protruding from the crook locking plate. 
         [0024]    Alternatively, the first end of the crook locking plate is provided with an operating panel laterally protruding from the crook locking plate, and the operating panel cooperates with the second stopper. 
         [0025]    Alternatively, the crook locking plate is provided at a location in contact with the unlock piece on the hoist bracket of the collapsible container, and when the collapsible container is in a folded state, the unlock piece on the hoist bracket contacts with the crook locking plate to disengage the crook locking plate from the crook lug. 
         [0026]    The present invention also discloses a collapsible container comprising the above connection mechanism. 
         [0027]    The connection mechanism of the present invention is convenient, fast and reliable to operate, and does not occupy the useful space of the container, does not affect the folding and sealing of the container and does not exceed the external dimensions of the container, and has no parts separated from the container, such a connection mechanism is especially suitable for the mechanized folding and assembling operations of the collapsible container. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0028]    In the following, a detailed description will be made about the advantages and features of the present invention in conjunction with the drawings. The drawings of the present invention listed below are used as a part of the present invention herein for the understanding of the present invention. The drawings illustrate the embodiments of the present invention and its description, so as to explain the principle of the present invention. In which, 
           [0029]      FIG. 1  is a view showing the door of the collapsible container of the present invention; 
           [0030]      FIG. 2  is an end view of the collapsible container of the present invention; 
           [0031]      FIG. 3  is an end view of the collapsible container of the present invention after being folded; 
           [0032]      FIG. 4  is a structural schematic view of the connection mechanism of the first embodiment of the present invention; 
           [0033]      FIG. 5  is a enlarged schematic view of the connection mechanism of the first embodiment of the present invention; 
           [0034]      FIG. 6  is a perspective view of  FIG. 5 ; 
           [0035]      FIG. 7  is a perspective view of the crook locking plate of the first embodiment of the present invention 
           [0036]      FIG. 8  is a perspective view of the first stopper of the first embodiment of the present invention; 
           [0037]      FIG. 9  is a schematic view showing the folding process of the collapsible container of the first embodiment of the present invention; 
           [0038]      FIG. 10  is another schematic view showing the folding process of the collapsible container of the first embodiment of the present invention; 
           [0039]      FIG. 11  is a schematic view showing the assembling process of the collapsible container of the first embodiment of the present invention; 
           [0040]      FIG. 12  is a enlarged schematic view of the connection mechanism of the second embodiment of the present invention; 
           [0041]      FIG. 13  is a perspective view of  FIG. 12 ; 
           [0042]      FIG. 14  is a perspective view of the crook locking plate of the second embodiment of the present invention 
           [0043]      FIG. 15  is a perspective view of the second stopper of the second embodiment of the present invention; 
           [0044]      FIG. 16  is a schematic view showing the assembling process of the collapsible container of the second embodiment of the present invention; 
           [0045]      FIG. 17  is another schematic view showing the assembling process of the collapsible container of the second embodiment of the present invention; 
           [0046]      FIG. 18  is still another schematic view showing the assembling process of the collapsible container of the second embodiment of the present invention; 
           [0047]      FIG. 19  is a schematic view showing the process of connecting a crook locking plate with a hoist bracket comprising a sliding part of the present invention; 
           [0048]      FIG. 20  is another schematic view showing the process of connecting a crook locking plate with a hoist bracket comprising a sliding part of the present invention; 
           [0049]      FIG. 21  is a schematic view showing the process of disconnecting a crook locking plate from a hoist bracket comprising a sliding part of the present invention; 
           [0050]      FIG. 22  is a schematic view showing the process of connecting a crook locking plate with a hoist bracket comprising another kind of sliding part of the present invention; 
           [0051]      FIG. 23  is a schematic view showing the process of disconnecting a crook locking plate from a hoist bracket comprising another sliding part of the present invention; 
           [0052]      FIG. 24  is a schematic view showing the process of connecting a crook locking plate with a hoist bracket comprising a swingable part of the present invention; and 
           [0053]      FIG. 25  is a schematic view showing the process of disconnecting a crook locking plate from a hoist bracket comprising a swingable part of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0054]    The description hereinafter gives a large quantity of specific details so as to provide a thorough understanding of the present invention. However, as obvious to the skilled in this art, the present invention may be implemented without one or more of these details. Some of the technical features well-know in this art are not described in other examples so as not to confuse with the embodiment of present invention. 
         [0055]    A detailed structure would be proposed in the following description for the purpose of thorough understanding the embodiment of present invention. Apparently, the implementation of the embodiment of present invention is not limited to special details known by the skilled in this art. The preferred embodiments of the present invention are described in detail as follows, however, the present invention can also comprise other embodiments besides these detailed description. 
         [0056]    As shown in  FIGS. 1 to 3 , the present invention discloses a connection mechanism for connecting the folded collapsible container, and specifically, the collapsible container comprises one chassis  11 , one top cover  12 , a rear end wall  13 , a front end wall  14  and two side walls. The upper ends of the rear end wall  13  and the front end wall  14  are hinged at the top cover  12 , and when being folded, overturn toward the inside of the container, and abut against and are secured onto the container inner face of the top cover  12 . Each of the side wall comprises a upper side wall  15  and a lower side wall  16 , the topside of the upper side wall  15  is hinged with the side of the top cover  12 , and the bottom side of the lower side wall  16  is hinged with the side of the chassis  11 , the bottom side of the upper side wall  15  is hinged with the topside of the lower side wall  16 . After the folding of the end walls, the side walls  15  and  16  are folded in a direction of the inside of the container, and at the same time, the top cover  12  falls down, thus completing the folding of the container, and the assembling process is reversed. 
         [0057]    As shown in  FIGS. 3 and 4 , the four corners of the top cover  12  are provided with a corner piece  121 , a top cover corner pillar  122  is provided below the corner piece  121 , and the four corners of the chassis  11  is provided with a bottom corner piece  111 , a chassis corner pillar  112  is provided above the bottom corner piece  111 . 
         [0058]    The connection mechanism of the present invention comprises a crook lug  23  and a crook locking plate  21 . The present invention will be explained hereinafter in the case that the crook locking plate  21  is located on the top cover corner pillar  122  and the crook lug  23  is located on the chassis corner pillar  112 . Absolutely, the crook locking plate  21  may also be provided on the chassis corner pillar  112  while the crook lug  23  is provided on the top cover corner pillar  122 . 
         [0059]    As shown in  FIGS. 5 and 6 , the crook lug  23  is provided on the chassis corner pillar  112 , and the crook locking plate  21  is rotatablely provided at the outer end face of the top cover corner pillar  122 . To be specified, herein and hereafter, the term “outer end face” refers to the outer end face of the pillar (the top cover corner pillar  122  and the chassis corner pillar  112 ) in the longitudinal direction of the collapsible container, for example, the outer end face of the top cover corner pillar  122  means the outer end face of the top cover corner pillar  122  in the longitudinal direction of the collapsible container. 
         [0060]    As shown in  FIG. 7 , the crook locking plate  21  is provided with a crook part  211  cooperating with the crook lug  23 , and alternatively, the crook lug  23  extends to protrude from the outer end face of the chassis corner pillar  112 . 
         [0061]    The connection mechanism of the present invention could realize the automatic connection of the top cover  12  with the chassis  11  when the container is folded, and when assembling the container, only a simple or even no manual operation is needed, its operational efficiency is high. Due to the fact that the installation location of the connection mechanism is the existing space outside of the container of a general container (the space of a general container for assembling the door hinge, the structure of the collapsible container of the present invention makes this space unusable, and this space can be utilized by the connection mechanism of the present invention), therefore the connection mechanism does not affect the internal dimensions of the container. The present connection mechanism has a large strength, and can satisfy the suspended ceiling shipment for one unit formed by stacking four or more folded containers. 
         [0062]    The connection mechanism of the present invention is convenient, fast and reliable to operate, and does not occupy the useful space of the container, does not affect the folding and sealing of the container and does not exceed the external dimensions of the container, and has no parts separated from the container, such a connection mechanism is especially suitable for the mechanized folding and assembling operations of the collapsible container. 
         [0063]    Specifically, as shown in  FIGS. 5 and 6 , the crook locking plate  21  could be hinged with the top cover corner pillar  122  by means of the crook locking plate shaft  22 . 
         [0064]    Referring to  FIGS. 5 and 6  again, optionally, the connection mechanism further comprises an elastic element  24 , the first end of the elastic element  24  abuts against the outer end face of the top cover corner pillar  122 , and the second end of the elastic element  24  abuts against the crook locking plate  21 . Further optionally, as shown in  FIG. 7 , the crook locking plate  21  is provided with a groove  213  for receiving the elastic element  24 , the elastic element  24  abuts against the bottom surface  212  of the groove. 
         [0065]    As shown in  FIGS. 9 and 11 , to secure the crook locking plate  21 , a stopper mechanism  25  can also be provided to be detachably connected with the crook locking plate  21 . 
         [0066]    As shown in  FIG. 7 , to enable the crook locking plate  21  to even more smoothly connect with the crook lug  23 , at least one of the first end of the crook locking plate  21  and the crook lug  23  could be provided with a second guiding inclined plane, and in the crook locking plate  21  shown in  FIG. 7 , the second guiding inclined plane  214  is provided at the first end of the crook locking plate  21 . 
         [0067]    Referring to  FIGS. 5 to 11 , the first embodiment of the present invention is illustrated. In the illustrated embodiment, the second end of the crook locking plate  21  is provided with an elastic element  24  which abuts between the top cover corner pillar  122  and the crook locking plate  21 . The crook lug  23  is provided at the outer end face of the chassis corner pillar  112 . The stopper mechanism  25  is provided at the outer end face of the top cover corner pillar  122 . 
         [0068]    As shown in  FIGS. 5 and 8 , when attaching the stopper mechanism  25  onto the top cover corner pillar  122 , the stopper mechanism  25  may comprise a first stopper  251  and a first stopper shaft  252 . The first end of the first stopper  251  is provided with a hole  2511 , through which the first stopper shaft  252  passes to be hinged with the top cover corner pillar  122  in a manner as shown in the illustrated embodiment that the outer end face of the top cover corner pillar  122  is further provided with a base and the first stopper shaft  252  is hinged with this base; it is also possible to provide a groove at the outer end face of the top cover corner pillar  122 , thus the first stopper shaft is hinged with the top cover corner pillar  122 . 
         [0069]    The second end of the first stopper  251  has a stopper crook  2512 , and in the present embodiment, the first stopper  251  is located above the crook locking plate shaft  22 . The stopper crook  2512  may be connected with the second end of the crook locking plate  21  so as to reach the purpose of restricting the crook locking plate  21 . Alternatively, at least one of the second end of the crook locking plate  21  and the first stopper  251  may be provided with a first guiding inclined plane, as shown in  FIG. 8 , the first stopper  251  is provided with a first guiding inclined plane  2513  thereon. As a result, the second end of the crook locking plate  21  is caused to contact with the first stopper  251  even more smoothly. 
         [0070]    As shown in  FIGS. 9 and 10 , when folding the collapsible container, the crook locking plate  21  is lowered together with the top cover  12 , when the crook locking plate  21  contacts with the crook lug  23 , the first end of the crook locking plate  21  is supported apart under the action of the second guiding inclined plane  214 , and the second end of the crook locking plate  21  compresses the elastic element  24  so that the elastic element  24  is compressed and deforms, when the first end of the crook locking plate  21  has its crook part  211  pass over the crook lug  23 , the restoring force of the elastic element  24  causes the crook locking plate  21  to rotate back into its initial position, and by this time, the crook part  211  of the crook locking plate  21  is hooked with the crook lug  23 , and the top cover corner pillar  122  exactly rests onto the chassis corner pillar  112 . The elastic element  24  enables the top cover  12  keep connection with the chassis  11  all the time in the process of handling and transporting the collapsible container. 
         [0071]    As shown in  FIG. 11 , when assembling the container, the crook locking plate  21  is firstly rotated outward, hence the elastic element  24  is compressed, when the stopper mechanism  25  is mounted onto the top cover corner pillar  122  as shown in the drawings, the second end of the crook locking plate  21  contacts with the first stopper  251 , and under the action of the first guiding inclined plane  2513 , the first stopper  251  is supported apart, when the second end of the crook locking plate  21  passes over the stopper crook  2512  of the first stopper  251 , the first stopper  251  rotates back into its initial position under the dead weight of the first stopper  251  or under the action of an stop elastic element, such as the spring provided inside of the first stopper  251 . By this time, the first stopper  251  and the crook locking plate  21  are hooked together, but the crook locking plate  21  is disengaged from the crook lug  23 , so that the collapsible container can be assembled. 
         [0072]    After the assembling of the collapsible container, the first stopper  251  can be manually disengaged from the crook locking plate  21 , and under the action of the elastic element  24 , the crook locking plate  21  rotates to its initial position. 
         [0073]    As shown in the second embodiment illustrated in  FIGS. 12-13 and 15 , the second embodiment differs from the first embodiment in that the stopper mechanism  25  may be provided on the chassis corner pillar  112 . In the illustrated embodiment, the stopper mechanism  25  comprises a second stopper  253  and a second stopper shaft  254 , the first end of the second stopper  253  is provided with a hole  2531 . The second stopper  253  is hinged with the chassis corner pillar  112  by means of the second stopper shaft  254  passing through the hole  2531 , in the illustrated embodiment, the second stopper  253  is located below the crook locking plate shaft  22 . Naturally, the second stopper shaft  254  may also be a portion of the chassis corner pillar  112  protruding outward. 
         [0074]    As shown in  FIGS. 15 and 16 , in an optional embodiment, alternatively, the second end of the second stopper  253  away from the hole (the first end) is provided with a handle  2532 . Optionally, the connection mechanism further comprises a stop block  1121  for restricting the second stopper  253 , and the stop block  1121  may be provided at the chassis corner pillar  112 . 
         [0075]    Before assembling the container, the crook locking plate  21  is manually rotated outward, then the handle  2532  is operated to rotate the second stopper  253  upwardly by an upward angle so as to abut against the stop block  1121 , the second end of the second stopper  253  away from the second stopper shaft  254  rests against the crook locking plate  21 . As shown in  FIG. 14 , optionally, the first end of the crook locking plate  21  is provided with an operating panel  216  laterally protruding from the crook locking plate  21 . 
         [0076]    By this time, the operating panel  216  of the crook locking plate  21  is required to be longer so as to in contact with the second stopper  253 , so that the crook locking plate  21  is supported by the second stopper  253 . By this time, the crook locking plate  21  disengages from the crook lug  23 , thus the collapsible container may be assembled. As shown in  FIG. 17 , in the process of assembling the collapsible container, the crook locking plate  21  ascends together with the top cover  12 , due to the action of the elastic element  24 , the crook locking plate  21  presses against the second stopper  253  all the time so that the crook locking plate  21  is kept in a state of being supported apart all the time. As shown in  FIG. 18 , when the crook locking plate  21  disengages from the second stopper  253 , the crook locking plate  21  is rotated into its initial position under the action of the elastic element  24 . Under the dead weight of the second stopper  253  or under the action of a stop elastic element, such as the spring provided on the second stopper  253 , the second stopper  253  rotates back into its initial position. When folding the collapsible container, the connecting action and its principle of the connection mechanism between the top cover and the chassis are the same to that of the first embodiment. 
         [0077]    Alternatively, the crook locking plate  21  is provided at a location in contact with the unlock piece on the hoist bracket of the collapsible container, and when the collapsible container is in a folded state, the unlock piece on the hoist bracket contacts with the crook locking plate to disengage the crook locking plate  21  from the crook lug  23 . The unlock piece is movable with respect to the hoist bracket. 
         [0078]    As shown in  FIG. 19 , the unlock piece is a kind of sliding part, when the collapsible container is in its folded state and begins to be assembled, after the hoist bracket, such as the one located at the dock, descends to connect with the top cover of the collapsible container, the sliding part  3  provided on the hoist bracket moves downward and contacts firstly with the second end of the crook locking plate  21 , similarly, the crook locking plate  21  or the sliding part  3  may be provided with an inclined face thereon. As shown in  FIG. 20 , after the sliding part  3  moves downward, it presses upon the second end of the crook locking plate  21 , as a result, the crook locking plate  21  is released from the crook lug  23 . As shown in  FIG. 21 , the hoist bracket lifts the top cover  12  of the collapsible container so that the crook locking plate  21  is separated from the crook lug  23  and then the sliding part  3  is moved upward from the crook locking plate  21 , thus the crook locking plate  21  is returned to its original state. As the hoist bracket is lifting and shipping the collapsible container in its folded state, the unlock piece has no action. Undoubtedly, the provision of the sliding part  3  is not limited to the manner as shown in the illustrated embodiments, the cooperation of the sliding part  3  and the crook locking plate  21  may also be other cooperation with the crook locking plate  21  by means of electrically-controlled members, for example. 
         [0079]    Now turn to  FIGS. 22 and 23 ,  FIG. 22  illustrates another kind of sliding part  3 ′, which, similar to the sliding part  3  in the embodiment shown in  FIG. 19 , may be provided on the hoist bracket. However, the sliding part  3 ′ of the present embodiment is inclined to the vertical direction, in this way, the sliding part  3 ′ may keep away from the corner piece  121 . When the sliding part  3 ′ acts, it will firstly contact with the second end of the crook locking plate  21  so that the crook locking plate  21  is released from the crook lug  23 . As shown in  FIG. 23 , now the hoist bracket lifts the top cover  12  of the collapsible container, and the sliding part  3 ′ may move away from the crook locking plate  21 , as a result, the crook locking plate  21  is caused to return to its original state. 
         [0080]    Undoubtedly, the sliding part  3 ′ may move together with the hoist bracket so as to contact or move away from the crook locking plate  21 . The sliding part  3 ′ may also be configured to have its separate power supply, for example an air cylinder or an oil cylinder, so as to operate the crook locking plate  21  independent of the hoist bracket. 
         [0081]      FIGS. 24 and 25  are schematic views showing the cooperation of the hoist bracket, comprising another kind of unlock piece, with the crook locking plate  21 . Unlike the above two embodiments, the unlock piece of the present embodiment is a swingable part  4  which may be provided on the hoist bracket by means of a member, such as a pivot shaft, and which is rotatable around the pivot shaft (the pivot shaft). 
         [0082]    The swingable part  4  may swing from the location shown in  FIG. 24  to the location shown in  FIG. 25  where it is possible to contact with the second end of the crook locking plate  21 , applies a force to the second end of the crook locking plate  21 , thus the crook locking plate  21  is caused to disengage from the crook lug  23 . The swingable part  4  may be configured to have a bend so that the contact with the crook locking plate  21  is further facilitated. In addition, the swing of the swingable part  4  may escape from the corner piece  121  so that the swingable part  4  is unlikely to occur undesirable interference with the corner piece  121 . As shown in  FIG. 25 , now the hoist bracket lifts the top cover  12  of the collapsible container, and the swingable part  4  may move away from the crook locking plate  21 , as a result, the crook locking plate  21  is caused to return to its original state. 
         [0083]    As shown in  FIGS. 1 to 4 , the present invention also discloses a collapsible container comprising the above connection mechanism. 
         [0084]    The present invention has been described with the above embodiments thereof, however, it should be appreciated that the above embodiments are used only for the purpose of illustration and explanation, rather than limiting the present invention within the scope of the described embodiments. Furthermore, the skilled in this art would understand that the present invention is not restricted to the above embodiments; the teaching according to the present invention can also be altered and modified in various ways, all of which fall into the protective scope claimed by the present invention.