Patent Publication Number: US-2022234511-A1

Title: Vehicle rear roof carrier device

Description:
TECHNICAL FIELD 
     The present invention relates to a carrier device installed on the roof of a vehicle and, more specifically, to a vehicle rear roof carrier device including roof supports fixed on two opposite sides of the roof of a vehicle in the length direction thereof, hollow roof fixing rails individually connected and fixed to the side surfaces of the roof supports, moving rails provided to the roof fixing rails and connected and installed up to the trunk, a moving cart slid along the roof fixing rails, and a carrier box detachable from the moving cart and receiving and storing articles, in which the moving rails are connected and installed up to a rear portion of the trunk, and the moving cart is moved down along the moving rails to load the carrier box with an article, so that it is possible to conveniently move down or up the carrier box to/from the roof of the vehicle to load or unload an article. 
     BACKGROUND ART 
     In general, a roof carrier device is installed on the roof of a vehicle to load and carry articles or things. 
     The conventional roof carrier for a vehicle has roof carrier bars installed on two opposite sides on the roof of the vehicle and an article storage box installed on a roof carrier support connecting the roof carrier bars. 
     The conventional roof carrier box is one installed to load luggage or skis on the roof of a vehicle. The roof carrier box is installed on multiple support rods crossing two roof racks installed in the length direction of the vehicle on the roof of the vehicle. 
     Such vehicle roof carrier and box are cargo loading means installed on the roof panel of a vehicle to load bulky and relatively light loads, such as skis, bicycles, leisure boxes, and other items and provide convenience for various uses, e.g., leisure and travel, and are equipped primarily in recreational vehicles. 
     However, the conventional roof carrier for automobiles requires a lot of force to load and unload cargo on/from the roof carrier support installed between the roof carrier bars because the roof carrier bars (racks) are fixed to the roof panel. Further, loading and unloading cargo on/from a roof carrier (or box) installed on a high vehicle, e.g., a van, requires use of a ladder which is very cumbersome. 
     Conventional vans, RVs, or SUVs have an auxiliary carrier on the rear in addition to the roof carrier (or carrier box) to carry more items. 
     According to the conventional art, the carrier box installed on the roof carrier (rails) on the roof of a vehicle are slid down along the rear auxiliary carrier (rails) to load or unload an article at the rear of the vehicle. However, the roof carrier is spaced apart from the auxiliary carrier by a certain distance (separated section). Thus, in the separated section, the carrier box may not seamlessly be slid down or may even escape off the separated section. 
     PRIOR TECHNICAL DOCUMENTS 
     Patent Documents 
     
         
         (Patent Document 1) KR 10-1709147 registered on Feb. 16, 2017. 
         (Patent Document 2) KR 20-1998-0039092 published on Sep. 15, 1998. 
         (Patent Document 3) KR 20-1999-0024979 published on Jul. 5, 1999. 
       
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Technical Problems 
     The present invention has been conceived to address the foregoing issues and aims to provide a vehicle rear roof carrier device including roof supports fixed on two opposite sides of the roof of a vehicle, roof fixing rails, moving rails slid along the insides of the roof fixing rails to extend or contract, a moving cart slid along the roof fixing rails, and a carrier box detachable from the moving cart and receiving and storing articles, in which the moving rails are extended and supported on the rear side of the trunk, and the moving cart is moved down to the ground along the roof fixing rails and the moving rails to load the carrier box with an article, so that it is possible to conveniently load and unload an article as the carrier box is moved from the roof of the vehicle to the rear of the vehicle. 
     Another object of the present invention is to conveniently move down the moving cart to the ground. To that end, the moving rails extendably or contractably drawn in or out the insides of the roof fixing rails provided on the roof of the vehicle include flexible bending sections in the middle portions thereof, and the user may extend the moving rails from the roof fixing rails and easily bend and support the moving rails to the outer surface of the trunk of the vehicle by applying force. 
     Another operation of the present invention is to increase the efficiency of cargo loading or unloading through a carrier box by allowing the carrier box to quickly be attached or detached to/from the moving cart. 
     Means to Address the Problems 
     To achieve the foregoing objectives, the present invention comprises a pair of roof supports  110  installed on two opposite sides in a length direction of a vehicle roof on an upper surface of the vehicle roof, hollow roof fixing rails  120  connected and fixed to the roof supports  110 , moving rails  130  installed on the roof fixing rails  120  and extending up to a rear surface of a vehicle trunk, a moving cart  140  installed on the roof fixing rails  120  and slid along outer surfaces of the roof fixing rails  120  and outer surfaces of the moving rails  130 , and a carrier box  150  installed on an upper surface of the moving cart  140  to receive and store an article. 
     Further, according to the present invention, the moving rails  130  are drawn out from insides of the roof fixing rails  120  and ends of the moving rails  130  are supported on the rear surface of the vehicle trunk. 
     Further, according to the present invention, the moving rails  130  are installed in pair on two opposite sides on the vehicle roof to face each other. A connection bracket  131  is provided at respective ends of the moving rails  130  to connect the moving rails  130 . An operating handle  132  is installed on the connection bracket  131  to draw the moving rails  130  in or out of the roof fixing rails  120 . 
     Further, according to the present invention, bending parts  133  are provided in middle portions of the moving rails  130 , each bending part  133  formed of a flexible connecting rod  133   a  over which a plurality of rigid rings  133   b  spaced apart from each other are fitted. 
     Further, according to the present invention, the moving cart  140  includes a plate-shaped body plate  141  on which the carrier box  150  is mounted, roller units  142  having first sides fixed and installed on a lower surface of the body plate  141  and second sides mounted and rollable on the roof fixing rails  120  and provided with rotation rollers  142 R, and a locking bracket  143  provided on a rear lower surface of the body plate  141  and where the operating handle  132  is locked or unlocked to/from the moving rails  130  while being supported. 
     Further, according to the present invention, a cylinder device  160  including front cylinders  161  and rear cylinders  162  extendable or contractable forward or rearward is installed on the lower surface of the moving cart  140 . First ends of the front cylinders  161  are connected to a lower front side of the body plate  141 , and second ends of the front cylinders  161  are connected to rear roller units  142   b  of the roller units  142 , and first ends of the rear cylinders  162  are connected to a lower rear side of the body plate  141 , and second ends of the rear cylinders  162  are connected to front roller units  142   a  of the roller units  142 , so that the moving cart  140  ascends or descends as the front cylinders  161  and the rear cylinders  162  extend or contract. 
     Further, according to the present invention, the operating handle  132  includes a body part  132   a  provided in the middle portion of the connection bracket  131  and having a recess portion  132   ab  at an upper end thereof, which is supported to the locking bracket  143  provided on the lower surface of the moving cart  140 , a handle part  132   b  provided at a lower end of the body part  132   a , an operation part  132   c  provided in the handle part  132   b , and a locking structure  132   d  provided on a side of an upper portion of the body part  132   a  and pivoted by the operation part  132   c  to be locked or unlocked to/from the locking bracket  143 . 
     Further, according to the present invention, the moving rails  130  are connected from the roof fixing rails  120  to the vehicle trunk. Second bending parts  230  are provided in connection portions between the roof fixing rails  120  and the moving rails  130  and are bent outward of the vehicle trunk. 
     Further, according to the present invention, the second bending parts  230  are bendable in a form of a chain with a plurality of joint structures  231  connected consecutively. Each of the plurality of joint structures  231  includes an upper plate  231   a  forming an upper surface thereof and a pair of side plates  231   b  formed downward from two opposite surfaces of the upper plate  231   a.    
     Further, according to the present invention, a first side portion of each of the side plates  131   b  includes a rounded protruding portion  231   c  having a first pivot pin hole h 1  through which a pivot pin  231   p  is inserted, and a second side portion thereof includes a recess portion  231   d  having a second pivot pin hole h 2  through which a pivot pin  231   p  is inserted. A rounded protruding portion  231   c  is rotatably fitted into the recess portion  231   d.    
     Further, according to the present invention, an upper jaw  231   e  formed by a front end of the upper plate  231   a  is provided on an upper surface of the rounded protruding portion  231   c , and a lower jaw  231   f  is provided on a lower surface of the rounded protruding portion  231   c . An upper distance L 1  from a rear surface of the upper plate  231   a  to the upper jaw  231   e  is larger than a lower distance L 2  from a rear lower end of the side plate  231   b  to the lower jaw  231   f.    
     Further, according to the present invention, a fixing pin  133   c  penetrating the connecting rod  133   a  is fixed to each of the rings  133   b.    
     Further, according to the present invention, an interval between lower sides of the rings  133   b  is equal to or larger than an interval between upper sides of the rings  133   b.    
     Further, according to the present invention, upper rails  144  are provided in the length direction on an upper surface of the moving cart  140 , and lower rails  151  are provided on a lower surface of the carrier box  150  to slide along the upper rails  144 . The carrier box  150  is slid down along the upper rails  144  and is then detached from the moving cart  140 . 
     Further, according to the present invention, upper rails  144  are provided in the length direction on an upper surface of the moving cart  140 , and lower rails  151  are provided on a lower surface of the carrier box  150  to be coupled with the upper rails  144 . The upper rails  144  have pivotable links. The carrier box  150  is moved down by rotation of the links and is then detached from the moving cart  140 . 
     Effects of the Invention 
     According to the present invention, in the vehicle rear roof carrier device, the moving rails inserted to the roof rails provided on two opposite sides of the roof of a vehicle are extended to be supported on the rear of the trunk. The moving cart is moved down to the ground along the roof fixing rails and the moving rails so as to load the carrier box with a cargo. As the carrier box is moved from the roof of the vehicle to the rear of the vehicle, it is possible to conveniently load or unload a cargo. 
     Further, according to the present invention, the moving rails extendably or contractably drawn in or out the insides of the roof fixing rails provided on the roof of the vehicle include flexible bending sections in the middle portions thereof, and the user may extend the moving rails from the roof fixing rails and easily bend and support the moving rails to the outer surface of the trunk of the vehicle by applying force. Thus, it is possible to quickly move down the moving cart to the ground and provide work convenience. 
     Further, according to the present invention, it is possible to increase the efficiency of cargo loading or unloading through a carrier box by allowing the carrier box to quickly be attached or detached to/from the moving cart. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view schematically illustrating a vehicle rear roof carrier device mounted on the roof of a vehicle according to the present invention; 
         FIG. 2  is a cross-sectional view schematically illustrating a vehicle rear roof carrier device mounted on the roof of a vehicle according to the present invention; 
         FIG. 3  is an exploded perspective view illustrating a vehicle rear roof carrier device according to the present invention; 
         FIG. 4  is a view illustrating a state in which operation rails of a vehicle rear roof carrier device are stretched along fixing rails and are bent to a trunk according to the present invention; 
         FIG. 5  illustrates a major parts and operation state of a cart of a vehicle rear roof carrier device according to the present invention; 
         FIG. 6  illustrates a state in which a cart of a vehicle rear roof carrier device is expanded to the rear of the trunk and the ground along roof fixing rails and operation rails according to the present invention; 
         FIG. 7  illustrates a state in which a cart of a vehicle rear roof carrier device is expanded at the rear of the trunk and a carrier box is then lowered to a lower surface through a link according to the present invention; and 
         FIG. 8  schematically illustrates operation rails of a vehicle rear roof carrier device according to another embodiment of the present invention. 
     
    
    
     BEST MODE TO PRACTICE THE INVENTION 
     Hereinafter, preferred embodiments of the present invention are described with reference to the accompanying drawings to be easily practiced by one of ordinary skill in the art. 
     Referring to  FIGS. 1 to 8 , according to the present invention, a vehicle rear roof carrier device  100  includes 
     a pair of roof supports  110  installed on two opposite sides in a length direction of a vehicle roof R on the vehicle roof (also referred to as a ‘roof’ or ‘roof panel’), 
     hollow roof fixing rails  120  connected and fixed to the roof supports  110 , 
     moving rails  130  installed to be drawn in or out of the roof fixing rails  120 , 
     a moving cart  140  installed on the roof fixing rails  120  and slid along outer surfaces of the roof fixing rails  120  from the vehicle roof panel to a rear surface of a trunk at the rear of the vehicle, and 
     a carrier box  150  installed on the moving cart  140  to receive and store things or articles. 
     A typical vehicle roof carrier and box is cargo loading means installed on the roof of a vehicle (including a general passenger car, a SUV, or an RV) to load bulky and relatively light loads, such as skis, bicycles, leisure boxes, and other items and provide convenience for various uses, e.g., leisure and travel, and are equipped primarily in recreational vehicles. 
     According to the present invention configured as above, the moving rails  130  are drawn out (extracted) from the roof fixing rails  120  installed on the roof panel of the vehicle and are slid down the rear of the vehicle. Then, the moving cart  140  is moved along the moving rails  130  from the roof fixing rails  120 . Then, the articles received in the carrier box  150  on the moving cart  140  are unloaded. Or, after loaded with articles, the carrier box  150  is slid up and fixed to the roof supports  110  and thus effectively carries articles or things which cannot be loaded inside the vehicle. 
     In this case, if the weight of the carrier box  150  is light, the moving rails  130  may be drawn out and transported together with the moving cart  140 . The carrier box  150  and the moving cart  140  may be coupled or decoupled depending on whether they are locked together. 
     Bases  111  may be installed on the vehicle roof panel to fix the roof supports  110 , with the roof supports  110  spaced apart from the upper surface of the roof by a predetermined height. Alternatively, without the bases  111 , the roof supports  110  may be tightly installed on the roof panel. 
     The roof supports  110  are fixed and installed on the vehicle roof panel on two opposite sides in parallel in the length direction of the vehicle roof panel. 
     The roof fixing rails  120  are fixed to the respective sides surfaces of the roof supports  110  and each of the roof fixing rails  120  is formed in a hollow rectangular bar shape. Alternatively, the roof fixing rails  120  may be installed on the respective upper surfaces of the roof supports  110 . 
     The moving rails  130  are installed to be slidably drawn in or out of the insides of the roof fixing rails  120 . 
     The moving rails  130  may be extended from the roof fixing rails  120  up to the rear of the trunk. If the moving rails  130  are one-stage moving rails  130 , the roof fixing rails  120  need to be sufficiently long to allow the moving rails  130  to extend up to the rear of the trunk. As necessary, the moving rails  130  may be formed in a multi-stage structure to be stretchable and contractable. 
     The moving rails  130  are installed on two opposite sides on the vehicle roof to face each other. A connection bracket  131  is provided at the respective first ends of the moving rails  130  to connect the moving rails  130 . An operating handle  132  is installed on the connection bracket  131  to draw the moving rails  130  in or out of the roof fixing rails  120 . 
     Thus, the moving rails  130  may be drawn in or out of the roof fixing rails  120  by pushing in or pulling out the operating handle  132 . 
     Further, bending parts  133  which are bendable are formed in the respective middle portions of the moving rails  130 . Each bending part  133  includes a connecting rod  133   a  formed of a flexible material and fitting media  133   b  fitted over the connecting rod  133   a  and spaced apart from each other. 
     In other words, the bending part  133  includes the connecting rod  133   a  formed of a flexible material that is bent when pressurized, and a plurality of rigid rings  133   b  spaced apart from each other are fitted over the connecting rod  133   a . The rings may be formed in a circular or rectangular shape. When the bending part  133  is pressurized and bent, the respective lower ends of the rings come in contact with each other, thus preventing further bending, while the opposite ends (outer sides) thereof are further spaced apart from each other than when the bending part  133  is not bent. A fixing pin  133   c  may be installed in the center of each ring  133   b  to pass through the connecting rod  133   a  to prevent the ring from moving from the connecting rod  133   a . Such fixing pins  133   c  support each other without moving from the connecting rod although the bending part  133  is warped so that the lower ends of the rings are pushed to come in contact with each other. These multiple rings may be regarded as forming multiple joints. Although the bending part  133  is bent, the moving cart  140  may be moved without sagging through the rigid joints. The bending part  133  may be changed into various shapes. For example, as shown in  FIG. 9 , the bending part  133  may be bent as rotation rings are continuously connected. 
     Meanwhile, as shown in  FIG. 9 , the bending part  133  is applicable even when installed on the rear of the vehicle, rather than expanding. In this case, if the trunk of the vehicle is opened, the bending part  133  is warped upward as shown in (b) of  FIG. 9 . At this time, the lower surfaces of the rings  133   b  come in contact with each other while pushing each other, bending the connecting rod  133   a . The upper and lower ends of the rings  133   b  may have the same interval and, when the trunk is open, the interval between the lower ends may be longer than the interval between the upper ends. 
     In the moving rails  130  configured as described above, if the operating handle  132  is pulled out, the moving rails  130  are drawn out (stretched) from the roof fixing rails  120  and, in this state, if the operating handle  132  is bent downwards, the bending part  133  is bent and the moving rails  130  are supported on the trunk of the housing. 
     Here, a rear supporting bracket  134  may be further installed on the trunk of the vehicle so that the ends of the moving rails  130  may be stably supported on the trunk. 
     Meanwhile, the moving cart  140  includes a plate-shaped body plate  141  on which the carrier box  150  is mounted, U-shaped roller units  142  having first sides fixed and installed on the lower surface of the body plate  141  and second sides mounted and rollable on the roof fixing rails  120  and provided with upper, lower, and side rotation rollers  142 R, and a locking bracket  143  provided on a rear lower side of the body plate  141  and where the operating handle  132  is locked or unlocked while being supported. 
     The body plate  141  has a flat plate shape, and the carrier box  150  is mounted and stably supported on the upper surface of the body plate  141 . 
     Further, the roller units  142  include a pair of front roller units  142   a  on the front lower surface of the body plate  141  and a pair of rear roller units  142   b  on the rear lower surface of the body plate  141 . The roller units  142  are stuck to the roof fixing rails  120  and the moving rails  130  and are thus prevented from escaping off even when the moving cart  140  is on the move. 
     In the so-configured moving cart  140 , the rotation rollers of the roller units  142  provided under the body plate  141  may roll and move forward or backward on the roof fixing rails  120 . 
     Further, when the moving rails  130  are extended from the roof fixing rails  120  and bent up to the lower end of the vehicle trunk and supported, the moving cart  140  is moved through the roof fixing rails  120  up to the ends of the moving rails  130 . 
     In this case, as the operating handle  132  is seated and locked to the locking bracket  143  provided under the body plate  141 , the moving cart  140  is fixed and supported. 
     Further, a cylinder device  160  that extends and contracts forward or backward so as to stably slide along the bending part  133  is installed on the lower surface of the moving cart  140 . 
     The cylinder device  160  includes a pair of front cylinders  161  and a pair of rear cylinders  162 . The respective first ends of the front cylinders  161  are pivotally connected to a front lower portion of the body plate  141 , and the respective second ends of the front cylinders  161  are pivotally connected to the rear roller units  142   b  so as to be extended or contracted. The respective first ends of the rear cylinders  162  are pivotally connected to a rear lower portion of the body plate  141 , and the respective second ends of the rear cylinders  162  are pivotally connected to the front roller units  142   a  so as to be extended or contracted. 
     Therefore, when the moving cart  140  slides through the bending part  133  section, the front cylinders  161  and the rear cylinders  162  are extended from each other so that the moving cart  140  may be further away from the moving rails  130  and be stably bent and slid. 
     In other words, the moving rails  130  are extended through the bending parts  133  and are then bent to the rear of the vehicle trunk and supported. In the state, the moving cart  140  is slid forward on the roof fixing rails  120  and, while sliding along the moving rails  130 , the moving cart  140  may be abruptly turned down along the sharply curved bending part  133  section. At this time, the front cylinders  161  are contracted while the rear cylinders  162  are extended, so that the moving cart  140  may stably slide downward. Conversely, when the moving cart  140  slides up along the moving rails  130 , the moving cart  140  is abruptly turned along the sharply curved bending part  133  section. At this time, the front cylinders  161  are extended while the rear cylinders  162  are contracted, so that the moving cart  140  may stably slide up onto the roof fixing rails  120 . 
     Meanwhile, the operating handle  132  includes a body part  132   a  provided in the middle portion of the connection bracket  131  and having a recess portion  132   ab  at an upper end thereof, which is supported to the locking bracket  143  provided on the lower surface of the moving cart  140 , a handle part  132   b  provided at a lower end of the body part  132   a , an operation part  132   c  provided in the handle part  132   b , and a locking structure  132   d  provided on a side of an upper portion of the body part  132   a  and pivoted by the operation part  132   c  to be locked or unlocked to/from the locking bracket  143 . The locking bracket  143  fastens or separates the moving cart  140  and the moving rails  130  to allow the moving rails  130  alone to be drawn out or allow the moving rails  130  to be drawn out in a coupled state of the moving rails  130  and the moving cart  140 . 
     In the configuration in which the locking structure  132   d  is rotated by the operation part  132   c  to be locked to or unlocked from the locking bracket  143 , a connection line, e.g., a cable, together with a tensioning means (not shown), is installed in the body part  132   a  so that if the operation part  132   c  is pressed, the locking structure  132   d  is rotated to be unlocked from the locking bracket  143 . This configuration may be easily implemented by one of ordinary skill in the art from known art, and thus, no detailed description thereof is given. Meanwhile, no description is present of a separate locking unit for locking or unlocking to draw out the moving rails  130  from the roof fixing rails  120 . 
     Further, upper rails  144  are provided on two opposite sides along the length direction thereof on the moving cart  140  to attach or detach the carrier box  150 . Lower rails  151  are provided on two opposite sides along the length d reception thereof on the lower surface of the carrier box  150  to be inserted to the upper rails  144  to slide up or down therealong. 
     If the upper rails  144  and the lower rails  151  are coupled, the carrier box  150  may be rendered to slidably move up or down on the upper surface of the moving cart  140 . 
     Further, a damper (not shown) and a handle  151   a  may further be installed on the lower ends of the lower rails  151  and the upper rails  144  to prevent the carrier box  150  from abruptly descending. If the handle  151   a  is pulled out, the upper rails  144  and the lower rails  151  are fastened so that the moving cart  140  and the carrier box  150  are moved together. 
     Further, a carrier handle  152  is provided on an upper surface of the carrier box  150 , and a detaching lever  153  for detaching the carrier box  150  is provided on the carrier handle  152 . 
     The configuration in which the carrier box  150  is detachable from the moving cart  140  by the detaching lever  153  may be easily implemented by one of ordinary skill in the art from known art, and no detailed description thereof is thus given. 
     According to the present invention configured as above, after the moving cart  140  is slid to the ends of the moving rails  130 , with the carrier box  150  fixed to the moving cart  140 , if the carrier box  150  is unlocked, the lower rails  151  descend along the upper rails  144  so that the carrier box  150  is landed on the ground. In this case, the carrier box  150  is safely landed on the ground by the damper provided on the lower ends of the lower rails  151  and the upper rails  144 . In this state, the detaching lever  153  is pressed, detaching the carrier box  150 . Then, a cargo is received in the carrier box  150 . 
     The carrier box  150  of the present invention may be configured as another embodiment as shown in  FIG. 7 . 
     In other words, the upper rails  144  installed on the upper surface of the moving cart  140  are configured to be pivoted by upper links  144   a  and lower links  144   b  pivotally installed on the upper surface of the moving cart  140 . 
     According to the present invention configured as such, after the moving cart  140  is slid up to the ends of the moving rails  130 , with the carrier box  150  fixed to the moving cart  140 , locking (the locking configuration is implemented by known art) of the upper links  144   a  and the lower links  144   b  are unlocked and then rotated. Subsequently, the lower rails  151  are slid down along the upper rails  144 , so that the carrier box  150  is landed on the ground. In this state, the detaching lever  153  is pressed, detaching the carrier box  150 . Then, a cargo is received in the carrier box  150 . 
     According to the present invention configured as above, after the moving rails  130  are moved down to the rear of the trunk of the vehicle, the moving cart  140  and the carrier box  150  may be moved, or the moving rails  130  may be slid while the moving cart  140  and the carrier box  150  are moved. 
     Further, according to the present invention, as shown in  FIG. 8 , the moving rails  130  may be formed in various configurations. In other words, as shown in (a) of  FIG. 8 , the moving rails  130  may be inserted in the roof fixing rails  120  to be able to be drawn in or out, and elastic springs  135  may be elastically connected to internal ends thereof. By such configuration, if the moving rails  130  are extended, the elastic springs  135  are slid and, when reaching the stoppers, are extended upwards. At this time, the moving rails  130  are pivoted by the pivot pins  136  provided at the ends of the roof fixing rails  120  so that the ends of the moving rails  130  are positioned to the rear of the trunk. Then, the carrier box  150  is moved to the ground to load or unload the cargo. As shown in (b) of  FIG. 8 , extension/contraction cylinders  137  may be configured instead of the elastic springs  135 . 
     According to an embodiment of the present invention, as described above, the moving rails  130  are installed to be slidably drawn in or out of the insides of the roof fixing rails  120 . 
     However, as shown in  FIGS. 9 and 10 , according to the present invention, the moving rails  130  may be connected to the ends of the roof fixing rails  120  to extend up to the external panel of the rear trunk T of the vehicle and to be fixedly installed. 
     In other words, according to another embodiment of the present invention, a second bending part  230  is provided at the connection portion between the roof fixing rail  120  and the moving rail  130  to be bent in one direction (upwards, direction indicated by arrow B, or direction outward of the trunk). 
     Thus, the moving cart  140 , which is installed to slide along the roof fixing rails  120 , may be slid from the roof fixing rails  120  through the second bending parts  230  to the ends (the rear lower ends of the trunk) of the moving rails  130 . 
     The second bending part  230  is formed to be bendable in the form of a chain with multiple joint structures  231  continuously connected. The joint structure  231  includes an upper plate  231   a  forming an upper surface and a pair of side plates  231   b  provided downward from two opposite sides of the upper plate  231   a . The side plate  231   b  includes a rounded protruding portion  231   c , which has a first pivot pin hole h 1  through which the pivot pin  231   p  is inserted, at one side portion (the front end) and a recess portion  231   d , which has a second pivot pin hole h 2  through which the pivot pin  231   p  is inserted, and to which the rounded protruding portion  231   c  is rotatably fitted, at the opposite side portion (the rear end). 
     An upper jaw  231   e  formed by the upper plate  231   a  is provided on the upper surface of the rounded protruding portions  231   c , and a lower jaw  231   f  is provided on the lower surface of the rounded protruding portions  231   c.    
     The upper length L 1  from the rear surface of the upper plate  231   a  to the upper jaw  231   e  is larger than the lower distance L 2  from the lower rear end of the side plate  231   b  to the lower jaw  231   f.    
     In the second pending part  230 , if the rounded protruding portions  231   c  are fitted to the recess portions  231   d  through the pivot pin  231   p , the joint structures  231  are pivotally connected to each other. If multiple joint structures  231  are assembled in such a manner to have a required length, the second bending part  230  is completed. In this case, two opposite ends of the second bending part  230  are connected by a separate connecting member (not shown). 
     Further, the second bending part  230  includes multiple left connection parts  230   a , which are connected so that the rounded protruding portion  231   c  of the joint structure  231  faces to the right (as viewed in the drawings), multiple right connection parts  230   b , which are connected so that the rounded protruding portion  231   c  of the joint structure  231  faces to the left (as viewed in the drawings) to face the left connection parts  230   a , and intermediate media  232  connecting the left connection part  230   a  and the right connection part  230   b.    
     In other words, the left connection part  230   a  and the right connection part  230   b  are provided to face each other with the intermediate medium  232  interposed therebetween. 
     The intermediate medium  232  includes an upper surface  232   a , a lower surface  232   b , and side surfaces  232   c  on two opposite sides. An upper surface distance L 3  of the upper surface  232   a  is larger than a lower surface distance L 4  of the lower surface  232   b . Medium recess portions  232   d  are formed at the front and rear in the two opposite side surfaces  232   c  to allow the rounded protruding portions  231   c  to be pinned with the pivot pins  231   p  and pivoted. 
     Thus, since the second bending part  230  with multiple connected joint structures  231  is installed so that the upper surface is longer than the lower surface, they may be connected while being bent to form a rounded shape. 
     In other words, as shown in  FIGS. 9 and 10 , the upper jaw  231   e  formed on the front surface of the upper plate  231   a  comes in tight contact with the rear surface of the consecutive neighboring upper plate  231   a , and the lower jaw  231   f  formed on the lower front surfaces of the side plates  231   b  forms a predetermined gap (hereinafter, referred to as a lower gap d 1 ) from the lower rear surfaces of the consecutive neighboring side plates  231   b.    
     As shown in (b) of  FIG. 9 , when the trunk T of the vehicle is open (lifted), the second bending part  230  is lifted in direction B while being forced on two opposite sides in directions A. At this time, as the joint structure  231  is pivoted about the pivot pin  231   p , the lower gap d 1  formed on the lower surface of the second bending part  230  is minimized, and the rear surface of the upper plate  231   a  and the upper jaw  231   e  in tight contact thereto are spread, forming an upper gap d 2 . 
     Therefore, when the trunk T of the vehicle is open, the second bending part  230  is lifted in direction A, preventing any issue with opening the trunk T (e.g., failure in opening the trunk when the second bending part  230  is curved in the direction opposite to the direction B). Further, in this case, the overall length of the upper surface of the second bending part  230  is increased due to the upper gap d 2  whereas the overall length of the lower surface of the second bending part  230  is reduced as the lower gap d 1  is minimized. When the trunk T is closed, the overall length of the lower surface of the second bending part  230  is increased while the overall length of the upper surface is reduced back to the original length. 
     As such, as the second bending part  230  is connected and fixed in a rounded shape on the roof fixing rails  120 , the moving cart  140  may be easily slid down (descend) from the roof fixing rails  120  to the ends of the moving rails  130 . 
     The second bending part  230  has been described as fixed to the rear of the vehicle, rather than extended. However, without being limited thereto, the shape of the bending part  130  is also possible. 
     As described above, according to the present invention, a vehicle rear roof carrier device includes roof supports fixed on two opposite sides of the roof of a vehicle in the length direction thereof, hollow roof fixing rails individually connected and fixed to the side surfaces of the roof supports, moving rails provided to the roof fixing rails and connected and installed up to the trunk, a moving cart slid along the roof fixing rails, and a carrier box detachable from the moving cart and receiving and storing articles. The moving rails are connected and installed up to a rear portion of the trunk, and the moving cart is moved down along the moving rails to load the carrier box with an article, so that it is possible to conveniently move down or up the carrier box to/from the roof of the vehicle to load or unload an article. 
     
       
         
           
               
             
               
                   
               
               
                 Legend of symbols 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
            
               
                 100: vehicle rear roof carrier device 
               
               
                 110: roof support 111: base 
               
               
                 120: roof fixing rail 
               
               
                 130: moving rail 
               
               
                 131: connection bracket 132: operating handle 132a: body part 132ab: recess portion 
               
               
                 132b: handle part 132c: operation part 132d: locking structure 133: bending part 
               
               
                 134: rear supporting bracket 135: elastic spring 136: pivot pin 137: extension/contraction cylinder 
               
               
                 140: moving cart 
               
               
                 141: body plate 142: roller unit 142a: front roller unit 142b: rear roller unit 
               
               
                 142R: rotation roller 143: locking bracket 144: upper rail 144a: upper link 
               
               
                 144b: lower link 
               
               
                 150: carrier box 
               
               
                 151: lower rail 151a: handle 152: carrier handle 153; detaching lever 
               
               
                 160: cylinder device 
               
               
                 161: front cylinder 162: rear cylinder 
               
               
                 230: second bending part 230a: left connection part 230b: right connection part 
               
               
                 231: joint 231a: upper plate 231b: side plate 
               
               
                 231c: rounded protruding portion 231d: recess portion 231e: upper jaw 231f: lower jaw 
               
               
                 231p: pivot pin h1: first pivot pin hole h2: second pivot pin hole 
               
               
                 d1: lower gap d2: upper gap L1: upper distance L2: lower distance 
               
               
                 L3: upper surface distance L4: lower surface distance 
               
               
                 232: intermediate medium 
               
               
                 232a: upper surface 232b: lower surface 232c: side surface 232d: medium recess portion