Patent Publication Number: US-2022237968-A1

Title: Dock shelter module provided with dual gate and air curtain

Description:
TECHNICAL FIELD 
     The present disclosure relates to a dock shelter module having a dual gate and an air curtain and, more particularly, to a dock shelter module having a dual gate composed of a first gate and a second gate. According to the present disclosure, when a sensor senses opening of a gate, the inside of a warehouse and a channel communicate with each other and an air curtain is formed, and when the sensor senses closing of the gate, the outside of the warehouse and the channel communicate with each other and an air curtain is formed, whereby it is possible to prevent leakage of the cold air in the warehouse and to prevent contaminants from entering the warehouse from the outside. 
     BACKGROUND ART 
     Description of this section only provides the background information of the present disclosure without configuring the related art. 
     A dock shell or a dock shelter maintains temperature by preventing transfer of cold air or hot air of the inside of a warehouse by sealing the space between a vehicle and a building when a vehicle is connected to the warehouse for loading and unloading. Further, the dock shell or a dock shelter prevents external contaminants from entering the building and the vehicle. 
     In general, freight that needs to be kept cold is not unloaded from a transport vehicle and directly carried into a cold storage warehouse. To this end, the dock seal or dock gate is installed on a wall of the dock. 
       FIG. 1  is a view showing a dock system having a sealing structure of the related art. 
     As shown in  FIG. 1 , a dock system of the related art is configured to effectively seal a front space and a side space using a front sealing part and side sealing parts. 
     The dock system of the related art also has the problem that air freely flows inside and outside a warehouse from the process of loading freight to the process of opening and closing a door. Further, the dock system has a single sealing unit, so there is a problem that the sealing ability is insufficient and appropriate sealing according to the sizes of vehicles is impossible. Prior Art Document: Korean Patent NO. 10-1950696 
     DISCLOSURE 
     Technical Problem 
     The present disclosure has been made in an effort to solve the problems of the related art and an objective of the present disclosure is to provide a dock shelter module of which the sealing ability is improved by forming a loading-unloading space with a top frame, side frames, and a bottom frame and disposing a dual gate at the front and rear, that can prevent air from flowing inside and outside a warehouse in loading and unloading by having an air curtain generator, and that forms an appropriate sealing structure regardless of the sizes of transport vehicle. 
     The objectives of the present disclosure are not limited to the objects described above and other objects will be clearly understood by those skilled in the art from the following description. 
     Technical Solution 
     In order to solve the problems described above, a dock shelter module according to the preset disclosure may include: a top frame; a pair of side frames coupled to both sides of the top frame and longitudinally extending; a bottom frame coupled to the lower ends of the side frames and having a dock leveler seated thereon; a first gate opening and closing the outside of the warehouse and a loading-unloading space; a second gate opening and closing the inside of the warehouse and the loading-unloading space; and an air curtain generator installed on the bottom of the top frame and forming an air curtain in the loading-unloading space. 
     The top frame may include a top channel and a top valve selectively controlling the flow of air, in which the top channel may include a first top channel of which an end is connected with the inside of the warehouse and the other end is connected to the top valve, a second top channel of which an end is connected with the outside of the warehouse and the other end is connected to the top valve, and a third top channel of which an end is connected to the air curtain generator and the other end is connected to the top valve. 
     The bottom frame may include a bottom channel communicating with the bottom frame and the inside and outside of the warehouse, and a bottom valve selectively controlling the flow of bottom air. 
     The dock shell module further includes an opening-closing sensor that senses whether the first gate and the second gate are opened and closed, and a controller that controls the top valve and the bottom valve and controls operation of the air curtain generator so that an air curtain is formed in accordance with whether the gates are opened and closed. 
     The side frames may have guides for guiding up-down movement of the first gate and the second gate, and the top frame may have a winder that winds and keeps the first gate and the second gate at the lower end of the top frame. 
     The dock shelter module may further include a security module that requires input of pre-stored user information to open the first gate and the second gate, in which the user information and information about opening and closing may be transmitted and stored in a server. 
     The closing speed of the first gate is set faster than the closing speed of the second gate when the first gate and the second gate are closed. 
     The dock shell module may further include a sealing device that is disposed in the top frame, the side frames, and the bottom frame, and seals gaps by moving when a transport vehicle “is connected to the warehouse, and the sealing device may have air spray nozzles for spraying air. 
     The bottom frame may further include a drying device and a drying spray nozzle for drying and sterilizing the loading-unloading space after loading/unloading is finished. 
     The second gate may have a reflective plate on a first surface thereof that faces the inside of the warehouse, and may have an air-pocket insulator on a second surface thereof that faces the loading-unloading space, thereby having a dual structure. 
     A bumper attenuating shock may be further disposed at the top frame, the side frames, and the bottom frame, and the bumper may include a sensor that recognizes approach when a transport vehicle approaches, and sends out a signal alarm when the transport vehicle approaches within a predetermined distance. 
     The first gate may be made of a transparent material, and the dock shelter module may further include a video device that outputs a video on the front surface of the first gate such that a commercial video can be seen with the first gate closed. 
     Advantageous Effects 
     The effects of the present invention having the configuration described above are as follows. 
     First, a dual gate is provided ahead of and behind a loading-unloading space, it is possible to effectively isolate the inside and outside of a warehouse not only during loading/unloading, but in normal time. 
     Second since an air curtain generator is disposed on the bottom of a top frame and an air curtain is formed during loading/unloading, it is possible to cold air in a warehouse from flowing outside and prevent contaminants from entering the warehouse from the outside. 
     Third, since a security module is provided, it is possible to enhance security by storing opening and using history of gates. 
     Fourth, channels and valves are disposed in a top frame and a bottom frame, so it is possible to enable air to smoothly circulate when an air curtain is formed. Further, a controller that automatically performs control in accordance with whether gates are opened and closed, so it is possible to effectively seal a loading-unloading space. 
     Fifth, since a sealing device that seals the gaps between the freight compartment of a transport vehicle and frames, and air spray nozzle are included, there is an advantage that it is possible to effectively seal a loading-unloading space during loading/unloading. 
     The effects of the present disclosure are not limited to those described above and other effects not stated herein may be made apparent to those skilled in the art from claims. 
    
    
     
       DESCRIPTION OF DRAWINGS 
       Not only the following detailed description of preferred embodiments of the present disclosure, but the summary described above will be understood well when they are read with the accompanying drawings. Preferred embodiments are shown in the drawings to exemplifying the present disclosure. However, it should be understood that the present disclosure is not limited by the accurate disposition and means in the drawings. 
         FIG. 1  is a view showing a dock system of the related art; 
         FIG. 2  is a perspective view showing the state in which a gate of a dock shelter module according to a first embodiment of the present disclosure is closed; 
         FIG. 3  is a perspective view showing the state in which the gate of the dock shelter module according to the first embodiment of the present disclosure is open; 
         FIG. 4  is a view showing flow of air when an air curtain generator of the dock shelter module according to the first embodiment of the present disclosure is in operation; 
         FIG. 5  is a side cross-sectional view showing the dock shelter module according to the first embodiment of the present disclosure; 
         FIG. 6  is a block diagram schematically showing operation of the dock shelter module according to the first embodiment of the present disclosure; 
         FIG. 7  is a view showing the state in which the dock shelter module according to the first embodiment of the present disclosure is installed at a warehouse; 
         FIG. 8  is a view showing the state in which a dock shelter module according to a second embodiment of the present disclosure is equipped with a sealing device; 
         FIG. 9  is a view showing the state in which the sealing device of the dock shelter module according to the second embodiment of the present disclosure is connected to a freight compartment of a transport vehicle; 
         FIG. 10  is a view showing the state in which a dock shelter module according to a third embodiment of the present disclosure is equipped with a dryer and drying spray nozzles; 
         FIG. 11  is a view showing the state in which a dock shelter module according to a fourth embodiment of the present disclosure is equipped with a winder; and 
         FIG. 12  is a cross-sectional view showing the state in which a commercial video is sent out on a first gate of a dock shelter module according to a fifth embodiment of the present disclosure. 
     
    
    
     BEST MODE 
     Hereafter, embodiments of the present disclosure are described in detail with reference to the accompanying drawings. However, the accompanying drawings are provided only for more easily describing the present disclosure and it would be apparent to those skilled in the art that the scope of the present disclosure is not limited to the accompanying drawings. 
     Further, it should be noted that when embodiments of the present disclosure are described, components having the same functions are only given the same names and reference numbers and are not substantially completely the same as components of the related art. 
     Terms used in the present specification are used only to describe specific exemplary embodiments rather than limiting the present disclosure. Singular forms are intended to include plural forms unless the context clearly indicates otherwise. It will be further understood that the term “comprises” or “have” used in this specification, specify the presence of stated features, steps, operations, components, parts, or a combination thereof, but do not preclude the presence or addition of one or more other features, numerals, steps, operations, components, parts, or a combination thereof. 
       FIG. 7  is a view showing the state in which a dock shelter module according to a first embodiment of the present disclosure is installed at a warehouse. 
     In general, a dock shell or a dock shelter is installed by boring a hole through a wall when a distribution warehouse is constructed. However, the dock shelter according to the present disclosure is modularized, so it can be separately manufactured, transported, and installed. 
       FIG. 2  is a perspective view showing the state in which a gate of a dock shelter module according to a first embodiment of the present disclosure is closed, and  FIG. 3  is a perspective view showing the state in which the gate of the dock shelter module according to the first embodiment of the present disclosure is open. 
     As shown in  FIGS. 2 and 3 , a dock shelter module  10  according to the first embodiment of the present disclosure is disposed at a side of a warehouse, thereby becoming a passage connecting the inside and outside of the warehouse. Accordingly, when freight is loaded on and unloaded from the freight compartment of a transport vehicle  20 , the dock shelter becomes a connection passage through which freight is directly carried into the warehouse. 
     The dock shelter module  10  according to the first embodiment of the present disclosure, in order to maintain the internal temperature of a warehouse by preventing cold air or heat in the distribution warehouse to flowing outside in loading and unloading and in order to contaminants from entering the warehouse from the outside of the warehouse, may include a top frame  110 , side frames  130 , a bottom frame  150 , a first gate  210 , a second gate  220 , and an air curtain generator  300 . 
     A loading-unloading space may be formed between the warehouse and the freight compartment of a transport vehicle by the top frame  110 , the side frames  130 , and the bottom frame  150 . The side frames  130  are coupled to both sides of the top frame  110  and longitudinally extend, and the bottom frame  150  is coupled to the lower ends of the side frames  130 . That is, a side of the side frame  130  is coupled to the top frame  110  and the other side is coupled to the bottom frame  150 . The dock shelter module  10  according to the first embodiment of the present disclosure may have a loading-unloading space through which freight is moved, by the top frame  110 , the side frames  130 , and the bottom frame  150 . 
     The top frame  110 , the side frames  130 , and the bottom frame  150  may further include a bumper (not shown) that attenuate shock. The bumper can prevent damage by absorbing shock when the transport vehicle approaches and collides with the frames. The bumper may further include a sensor (not shown) that recognizes approach when the transport vehicle  20  approaches, and sends out a signal alarm when the transport vehicle  20  approaches within a predetermined distance. 
     In the present disclosure, the outside of a warehouse is defined as the front of a loading-unloading space and the inside of the warehouse is defined as a rear of the loading-unloading space. The first gate  210  and the second gate  220  are coupled to the top frame  110 , thereby being able to open and close the loading-unloading space. The first gate  210  is disposed at the front of the loading-unloading space, thereby being able to open and close the outside of the warehouse and the loading-unloading space. The second gate  220  is disposed at the rear of the loading-unloading space, thereby being able to open and close the loading-unloading space and the inside of the warehouse. 
     The air curtain generator  300 , which is a device that forms an air curtain by spraying air to the loading-unloading space, may be installed between the first gate  210  and the second gate  220  on the bottom of the top plate  110 . 
     The gate is open during loading-unloading, so there is a problem that cold air in the warehouse flows to the outside and external contaminants enters the warehouse. Since the air curtain generator  300  for an air curtain, it is possible to prevent the cold air in the warehouse from flowing outside and contaminants outside the warehouse from entering the warehouse. 
     The dock shelter module  10  according to the first embodiment of the present disclosure may further include a security module  400  that requires input of pre-stored user information to open the first gate  210  and the second gate  220 . When a user inputs user information, information of the date and time of opening and closing the first gate  210  and the second gate  220  can be transmitted and stored to a separate server together with the user information. To this end, a separate management server connected with the security module  400  through wireless communication may be provided, which is not described in detail as the related art. 
     The security module  400  includes a fingerprint sensor or an iris sensor, thereby enabling a user to input and store fingerprint information or iris information in advance and to input corresponding information to open the first gate  210  and the second gate  220 . Since the security module  400  is provided, security is enhanced and the loading-unloading work history is stored, whereby it is possible to effectively manage stocks. 
     When loading/unloading is finished and the first and second gates  210  and  220  are closed to close the loading-unloading space, the closing speed of the first gate  210  may be set faster than the closing speed of the second gate  220 . This is because since the second gate  220  opens and closes the inside of the warehouse and the loading-unloading space, it is required to quickly close the second gate after loading/unloading is finished in order to prevent the cold air in the warehouse from flowing outside. On the contrary, since the first gate  210  opens and closes the loading-unloading space and the outside of the warehouse, the humidity in the loading-unloading space should be sufficiently discharged out of the warehouse, so the closing speed of the first gate  210  may be set slower than the closing speed of the second gate  220 . 
     Since the second date  220  is in contact with the inside of the warehouse filled with cold air, vapor may condensate into waterdrops due to the temperature difference between the loading-unloading space and the inside of the warehouse. When water exists in the loading-unloading space, the loading-unloading space may be contaminated or a safety accident may occur due to a slip in loading-unloading. Accordingly, the second gate  220  may need to be made of a heat insulator. To this end, the second gate  220  has a reflective plate on the surface facing the inside of the warehouse and an air-pocket insulator on the surface facing the loading-unloading space, so it can be configured in a dual structure. 
       FIG. 4  is a view showing flow of air when an air curtain generator of the dock shelter module according to the first embodiment of the present disclosure is in operation. 
     Referring to  FIG. 4 , an air curtain may be formed in the loading-unloading space by the air curtain generator  300 . Air is sprayed toward the bottom frame  150  from the air curtain generator  300  installed at the top frame  110 , whereby it is possible to prevent the cold air in the warehouse from flowing outside and contaminants outside the warehouse from entering the warehouse. The sprayed air can flow into bottom frame  150  and then can continuously circulate in the loading-unloading space through the side frames  130 . A duct (not shown) that communicates with the frame assembly or the loading-unloading space and through which air can flow may be provided in the bottom frame  150  and the side frames  130  for air circulation. 
       FIG. 5  is a side cross-sectional view showing the dock shelter module according to the first embodiment of the present disclosure. 
     A top channel  320  that communicates with the air curtain generator  300  of the warehouse and the inside and outside of the warehouse may be formed in the top frame  110 . A top valve  310  for selectively controlling inflow of air, if necessary, as a passage through which air to be supplied to the air curtain flows inside may be disposed at the top channel  320 . 
     The dock shelter module  10  according to the first embodiment of the present disclosure may be configured such that cold air is sprayed to maintain the temperature in the warehouse during loading/unloading and such that hot air is sprayed to dry the loading-unloading space after loading/unloading is finished. To this end, the top channel  320  may be composed of a first top channel  321 , a second top channel  322 , and a third top channel  323 . 
     In the top channel  320 , an end of the first top channel  321  is connected with the inside of the warehouse and the other end is connected with the top valve  310 ; an end of the second top channel  322  is connected with the outside of the warehouse and the other end is connected to the top valve  310 ; and an end of the third top channel  323  is connected to the air curtain generator  300  and the other end is connected to the top valve  310 . 
     This configuration is described in detail with reference to  FIG. 5 . When the first gate  210  and the second gate  220  start to open for loading/unloading, the air curtain generator  300  is operated and an air curtain is formed. In this case, cold air may be sprayed from the air curtain generator  300  by the cold air in the warehouse. When the top valve  310  is set to communicate with the third top channel  323 , the cold air in the warehouse can flow to the air curtain generator  300  through the third top channel  323  after flowing in the first top channel  321 . Since the cold air in the warehouse flows into the air curtain generator  300  during loading/unloading with the first gate  210  and the second gate  220  open, cold air is sprayed and an air curtain is formed. Accordingly, it is possible to prevent a loss of the cold air in the warehouse and there is no need for a separate compressor, etc. for producing cold air, so there is an effect of a simple structure and a low cost. 
     When loading/unloading is finished and the first gate  210  and the second gate  220  start to close, the air that flows into the air curtain generator  300  is switched with the air outside the warehouse. To this end, the top valve  310  is configured such that the second channel having an end connected with the outside of the warehouse is connected with the third channel. When the air outside the warehouse flows into the second top channel  322  and flows to the air curtain generator  300  through the third top channel  323 , hot air can be sprayed from the air curtain generator  300 . Though not shown in the figures, a separate heater may be disposed at the top frame  110  so that air that flows inside can be sprayed with the temperature increased. 
     When cold air is sprayed and the loading-unloading space is closed during loading/unloading, the cold air in the loading-unloading space condensates, so dew condensation may occur. Accordingly, the loading-unloading space may be contaminated, or a safety accident may occur in the following loading/unloading. Therefore, it is possible to dry the loading-unloading space by spraying hot air. 
     Further, as shown in  FIG. 5 , a bottom channel  340  may also be formed in the bottom frame  150 . The bottom channel  340  passes air such that the air sprayed from the air curtain generator  300  can flow inside and circulate. A bottom valve  330  that selectively controls the flow of air may be disposed at the bottom channel  340 . 
     The bottom channel  340  may be composed of a first bottom channel  341  of which an end is connected with the inside of the warehouse and the other end is connected to the bottom valve  330 , a second bottom channel  342  of which an end is connected with the outside of the warehouse and the other end is connected to the bottom valve  330 , and a third bottom channel  343  of which an end is connected to the bottom of the bottom frame  150  and the other end is connected to the bottom valve  330 . 
     When cold air is sprayed from the air curtain generator  300  during loading/unloading, the cold air flows to the bottom frame  150  and flows into the third bottom channel  343  connected to the bottom frame  150 . The air flowing in the third bottom channel  343  flows to the bottom valve  330 . The bottom valve  330  is set such that the third bottom channel  343  and the first bottom channel  341  communicate with each other with the first gate  210  and the second gate  220  open. Accordingly, the air flowing inside can flow to the first bottom channel  341  and can be discharged back into the warehouse. 
     When loading/unloading is finished, hot air is sprayed from the air curtain generator  300  and flows into the third bottom channel  343 . In this case, the bottom valve  330  is set such that the third bottom channel  343  and the second bottom channel  342  communicate with each other. Accordingly, the air flowing inside flows to the second bottom channel  342  and is discharged out of the warehouse. 
     Since the bottom channel  340  is formed, the air sprayed from the air curtain generator  300  smoothly circulates, so an excellent effect of preventing the cold air in the warehouse from flowing outside and external contaminants from flowing inside is achieved. 
     Though not shown in the figures, a fan that make the flow of air smooth may be further disposed in the top channel  320  and the bottom channel  340 , whereby air is enabled to smoothly flow inside and outside. 
       FIG. 6  is a block diagram schematically showing operation of the dock shelter module according to the first embodiment of the present disclosure. 
     Referring to  FIG. 6 , the dock shelter module  10  according to the first embodiment of the present disclosure may further include: an opening-closing sensor  800  that senses whether the first gate  210  and the second gate  220  open or close; and a controller  900  that controls the top valve  310  and the bottom valve  330  and operation of the air curtain generator  300 . 
     When the opening-closing sensor  800  senses opening of the first gate  210  and the second gate  220 , the controller  900  can output an operation signal of the air curtain generator  300  and can control the top valve  310  such that the first top channel  321  and the third top channel  323  communicate with each other. 
     When the opening-closing sensor  800  senses opening of the first gate  210  and the second gate  220 , the controller  900  can control the bottom valve  330  such that the first bottom channel  341  and the third bottom channel  343  communicate with each other. 
     Accordingly, when the first gate  210  and the second gate  220  are opened for loading/unloading, the air curtain generator  300  can automatically form an air curtain using the cold air in the warehouse. The air sprayed from the air curtain generator  300  can be continuously circulated in the warehouse by the bottom channel  340 , it is possible to effectively prevent the air in the warehouse from flowing outside and contaminants from flowing inside from the outside of the warehouse. 
     When closing of the first gate  210  and the second gate  220  is sensed, the controller  900  can control the top valve  310  such that the second top channel  322  and the third top channel  323  communicate with each other. In this case, when a separate heater for increasing the temperature of external air is provided, the controller  900  may control operation of the heater. The controller  900  may output an operation stop signal of the air curtain generator  300  after a predetermined time passes. 
     When closing of the first gate  210  and the second gate  220  is sensed, the controller  900  can control the bottom valve  330  such that the second bottom channel  342  and the third bottom channel  343  communicate with each other. Accordingly, when the first gate  210  and the second gate are closed, external air flows into the air curtain generator  300  and sprayed. The sprayed air is discharged outside through the bottom channel  340 , whereby air can be circulated. 
       FIG. 8  is a view showing the state in which a dock shelter module according to a second embodiment of the present disclosure is equipped with a sealing device and  FIG. 9  is a view showing the state in which the sealing device of the dock shelter module according to the second embodiment of the present disclosure is connected to a freight compartment of a transport vehicle. 
     Referring to  FIG. 8 , a dock shelter module  10  according to the second embodiment of the present disclosure may further include a sealing device  500 . When a transport vehicle is connected to the warehouse for loading/unloading, the sealing device  500  can seal the gaps between the freight compartment, the top frame, the side frames, and the bottom frame. 
     To this end, the sealing device  500  is composed of four rectangular frames of top, bottom, left, and right frames, and may be disposed in the top frame  110 , the side frames  130 , and the bottom frame  150 , respectively. Accordingly, the sealing device is maintained in the frames when loading/unloading is not performed. When the transport vehicle  20  is connected to the warehouse for loading/unloading, the four frames of the sealing device  500  are moved to protrude out of the frame toward the transport vehicle  20  and brought in close contact with the freight compartment, thereby being able to seal the gaps. The protrusion length of the sealing device  500  from the frames is maximally within 30 cmm, and preferably, within 15 cm and 30 cm. The length means the distance that the sealing device  500  can move toward the freight compartment of the transport device  20  from the top frame  110 , the side frames  130 , and the bottom frame  150 . 
     The entire sealing device  500  or the portion thereof that is in contact with the transport vehicle  20  may be made of an electromagnet. When the sealing device is in close contact with the freight compartment of the transport vehicle  20 , a current flows, so magnetism is generated. Accordingly, they are strongly connected by the magnetic force, whereby the gaps can be effectively sealed. Further, after loading/unloading is finished, the current is removed, and the sealing device can be easily separated from the freight compartment. 
     Air spray nozzles  510  that spray air to the surface that is connected to a freight compartment may be disposed at the rectangular frames of the sealing device  500 . 
     Referring to  FIG. 9 , air can be sprayed forward from the air spray nozzles  510 . The freight compartment of the transport vehicle  20  is uneven, so it is difficult to completely come in close contact with the sealing device  500 . Accordingly, it is possible to prevent dust, insects, etc. from entering the gap between the frames and the freight compartment by spraying air through the air spray nozzles  510 . 
       FIG. 10  is a view showing the state in which a dock shelter module according to a third embodiment of the present disclosure is equipped with a dryer and drying spray nozzles. 
     As shown in  FIG. 10 , a drying device  600  may be installed at the bottom frame  150 . The drying device  600  may include one or more spray nozzles  610  that spray a drying substance to the bottom frame  150 . The drying device  600  may be a steam device that is a device of liquid, etc. treated with water or a chemical into high-temperature and high-pressure steam, or may be a microwave device. The drying spray nozzles  610  are installed at the drying device  600  and can spray high-temperature and high-pressure steam or microwaves to the loading-unloading space. 
     Since contaminants, humidity, etc. may remain in the loading-unloading space after loading/unloading, there is an advantage that it is possible to manage the loading-unloading space by washing out contaminants and removing humidity by supplying steam or microwaves. 
     It is shown in  FIG. 10  that the drying device  600  and the drying spray nozzles  610  are installed at the bottom frame  150 , but the drying device  600  and the drying spray nozzles  610  may be installed at the top frame  110  or the side frames  130  to dry the loading-unloading space. 
       FIG. 11  is a view showing the state in which a dock shelter module according to a fourth embodiment of the present disclosure is equipped with a winder. 
     Referring to  FIG. 3 , the side frames  130  may include guides  211  and  212 , in which the first gate  210  and the second gate  220  are inserted to be guided up and down, on a surface on which the loading-unloading space is formed by the side frames  130 . Referring to  FIG. 11 , a winder  700  that winds the upper portions of the first gate  210  and the second gate  220  under the top frame  110  when the first gate  210  and the second gate  220  are opened may be disposed at the top frame  110 . When the first gate  210  and the second gate  220  are opened for loading/unloading, the first gate  210  and the second gate  220  can be lifted along the guides  211  and  221  and wound and kept on the winder  700 . 
       FIG. 12  is a cross-sectional view showing the state in which a commercial video is sent out on a first gate of a dock shelter module according to a fifth embodiment of the present disclosure. 
     As shown in  FIG. 12 , in the present disclosure, the first gate  210  may be made of a transparent material and a video device (not shown) that outputs a video to the first gate  210  may be further included. The video device outputs a video to the front surface of the first gate  210 , whereby the output video image can be displayed on the first gate. In this case, when a commercial video is produced and output, it is possible to see the commercial video displayed on the first gate  210  from the outside of the warehouse, so an advertisement and information effect can be achieved. 
     The dock shelter modules according to the second to fifth embodiments are the same as in the other configuration except for the additional configuration separately described above, as compared with the dock shelter module according to the first embodiment. Accordingly, the configuration not specifically described can be applied to the second to fifth embodiments in the same way, and accordingly, repeated description is omitted. 
     Although preferred embodiments of the present disclose were described above, it would be apparent to those skilled in the art that the present disclosure may be achieved in other specific types without departing from the scope or spirit other than the embodiments described above. Accordingly, the embodiments describe above should be considered as being exemplifying rather than limiting, so the present disclosure may be changed within the range of the claims and the equivalent range without being limited to the above description.