Patent Publication Number: US-2021170935-A1

Title: Vehicle

Description:
This is a continuation application of U.S. patent application Ser. No. 16/170,697, filed Oct. 25, 2018, which is based on Japanese Patent Application No. 2017-209355 filed on Oct. 30, 2017 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference. 
    
    
     BACKGROUND 
     Field 
     The present disclosure relates to a vehicle. 
     Description of the Background Art 
     A van-type vehicle described in Japanese Patent Laying-Open No. 2002-206838 includes a driver&#39;s seat, a general baggage loading compartment, and a vehicle-mounted refrigerator. The general baggage loading compartment is disposed on the rear side of the driver&#39;s seat. 
     SUMMARY 
     The inventors of the present application have discussed a delivery system configured to deliver a delivery item to a cooling box mounted on a vehicle. 
     As for the vehicle used in the above-described delivery system, it is necessary to prevent another person from freely opening the cooling box and to allow a prescribed deliverer to open the cooling box. In this case, it is necessary to take into consideration the convenience when the deliverer puts the delivery item into the cooling box. 
     The present disclosure has been made in view of the above-described problem, and an object of the present disclosure is to provide a vehicle including a cooling box that can accommodate a delivery item, with improved convenience of a deliverer. 
     A vehicle according to the present disclosure includes: a vehicle main body having a passenger compartment and a rear compartment located more rearward than the passenger compartment; a rear hatch provided on the vehicle main body and configured to open and close the rear compartment; a cooling box disposed in the rear compartment; a first communication device configured to communicate with an external server; a second communication device having a communication distance shorter than that of the first communication device; a locking device configured to lock the rear hatch; and a processor. The processor is configured to receive information about an opening signal from the server through the first communication device, and to open the rear hatch when the processor receives the opening signal through the second communication device. 
     According to the above-described vehicle, a deliverer or the like can transmit the opening signal near the vehicle, thereby opening the rear hatch. When the vehicle is parked forward, the deliverer or the like can easily put a delivery item into the cooling box. 
     The cooling box is disposed closer to the rear hatch than the passenger compartment. According to the above-described vehicle, the deliverer, the user or the like can easily put the object into the cooling box. 
     The vehicle further includes a front-row seat and a rear-row seat disposed more rearward than the front-row seat. The front-row seat and the rear-row seat are disposed in the passenger compartment. The passenger compartment and the rear compartment are separated by the rear-row seat. By deforming at least a part of the rear-row seat, an object contained in the cooling box can be taken out from the passenger compartment. 
     According to the above-described vehicle, by deforming the rear-row seat, an object contained in the cooling box can be taken out from the passenger compartment. 
     The vehicle further includes: a first side surface and a second side surface arranged in a width direction; a first rear wheel disposed more rearward than a center in a front-back direction of the vehicle main body and on the first side surface side; and a second rear wheel disposed more rearward than the center and on the second side surface side. The cooling box is disposed between the first rear wheel and the second rear wheel. According to the above-described vehicle, even when the vehicle receives side collision, the cooling box can be protected. 
     The cooling box is disposed at a center in the width direction of the vehicle main body. According to the above-described vehicle, even when an object to be contained is put into the cooling box, disturbance of the balance of the vehicle in the right and left direction can be suppressed. 
     The cooling box is provided so as to be movable in the front-back direction of the vehicle main body within the rear compartment. According to the above-described vehicle, when an object to be contained is put into the cooling box, the cooling box is moved to the vehicle rear side, and thus, the object to be contained can be easily put into the cooling box. Furthermore, the cooling box is moved frontward, and thus, an object contained in the cooling box can be taken out from the passenger compartment. 
     The foregoing and other objects, features, aspects and advantages of the present disclosure will become more apparent from the following detailed description of the present disclosure when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram schematically showing a delivery system  1 . 
         FIG. 2  is a block diagram schematically showing a configuration of a deliverer terminal  3 . 
         FIG. 3  is a block diagram schematically showing a configuration of a user terminal  4 . 
         FIG. 4  is a block diagram schematically showing a configuration of a server  5 . 
         FIG. 5  is a side view showing a configuration of a vehicle  2 . 
         FIG. 6  is a schematic diagram schematically showing vehicle  2 . 
         FIG. 7  is a plan view showing a configuration of vehicle  2  on the rear side. 
         FIG. 8  is a plan view when a rear hatch  52  is omitted from the state shown in  FIG. 7 . 
         FIG. 9  is a perspective view showing the rear surface side of vehicle  2 , with rear hatch  52  being open. 
         FIG. 10  is a perspective view schematically showing a cooling box  53 . 
         FIG. 11  is a plan view showing a cooling circuit  55  and the like. 
         FIG. 12  is a sequence diagram of delivery system  1 . 
         FIG. 13  is a schematic diagram showing, in a plan view, a state in which a deliverer  7  has come very close to vehicle  2 . 
         FIG. 14  is a schematic diagram showing a state in which deliverer  7  has come close to rear hatch  52 . 
         FIG. 15  is a plan view showing a part of a vehicle  2 A according to a second embodiment. 
         FIG. 16  is a perspective view of vehicle  2 A, with rear hatch  52  being open. 
         FIG. 17  is a front view showing a rear-row seat  51 . 
         FIG. 18  is a front view of rear-row seat  51 , with an arm rest  93  being rotated and disposed on seat cushions  96  and  99 . 
         FIG. 19  is a plan view showing the rear side of a vehicle  2 B. 
         FIG. 20  is a perspective view showing a configuration of a cooling box  53 B and its surroundings. 
         FIG. 21  is a perspective view showing a state in which cooling box  53 B is disposed on the rear surface  72  side. 
         FIG. 22  is a perspective view showing a state in which cooling box  53 B is disposed on the rear-row seat  51  side. 
         FIG. 23  is a plan view showing an example in which cooling box  53  is disposed on the right side surface  70  side. 
         FIG. 24  is a plan view showing an example in which cooling box  53  is disposed on the left side surface  71  side. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     First Embodiment 
     A delivery system and a vehicle according to the present embodiment will be described with reference to  FIGS. 1 to 24 . The same or substantially the same components, of the components shown in  FIGS. 1 to 24 , are denoted by the same reference characters, and redundant description will not be repeated. 
       FIG. 1  is a schematic diagram schematically showing a delivery system  1 . Delivery system  1  includes a vehicle  2 , a deliverer terminal  3 , a user terminal  4 , a server  5 , and the Internet (registered trademark)  6 . 
     Vehicle  2 , deliverer terminal  3 , user terminal  4 , and server  5  are configured to communicate with one another through the Internet  6 . 
     Vehicle  2  is, for example, a vehicle owned by a user  9 . Vehicle  2  is, for example, configured to transmit position information of vehicle  2  to server  5  through the Internet  6 . 
     Deliverer terminal  3  is carried by a deliverer  7 . Deliverer terminal  3  obtains various types of information from server  5  through the Internet  6 . Deliverer  7  uses a delivery vehicle  8  to deliver a delivery item W to a prescribed delivery destination. 
     User terminal  4  is used by user  9 . Examples of user terminal  4  include a smartphone, a mobile phone, a personal computer and the like. 
     By operating user terminal  4 , user  9  can purchase a commodity and perform a delivery procedure. 
       FIG. 2  is a block diagram schematically showing a configuration of deliverer terminal  3 . Deliverer terminal  3  includes a processor  10 , a storage  11 , a display  12 , and a communication device  13 . 
     Processor  10  executes processing operation using information stored in storage  11 , information obtained from communication device  13 , and the like. The processing operation in processor  10  is executed by software, hardware such as an electric circuit, or the like. 
     Prestored information, information obtained through communication device  13 , and the like are stored in storage  11 . Display  12  is a touch panel-type screen on which various types of information are displayed. Therefore, by operating display  12 , deliverer  7  can input various types of information. Communication device  13  obtains various types of information from server  5  and the like through the Internet  6 . 
     For example, communication device  13  obtains information such as a delivery destination of delivery item W from server  5  through the Internet  6 . 
       FIG. 3  is a block diagram schematically showing a configuration of user terminal  4 . User terminal  4  includes a processor  20 , a storage  21 , a display  22 , and a communication device  23 . Processor  20  is configured to execute processing operation using information stored in storage  21  and information obtained through communication device  23 . Prestored information and information obtained through communication device  23  are stored in storage  21 . 
     Display  22  is configured to display various types of information. Display  22  is, for example, a touch panel-type liquid crystal display. Communication device  23  is configured to receive and transmit information to and from server  5  and the like through the Internet  6  and the like. 
     By operating display  22 , user  9  can, for example, purchase a commodity and specify a delivery destination through the Internet  6 . Processor  20  can transmit request information input through display  22  to server  5  through communication device  23  and the Internet  6 . The request information includes, for example, information specifying a purchased commodity, and delivery request information. The delivery request information includes, for example, information indicating the delivery time and information indicating a delivery destination. 
       FIG. 4  is a block diagram schematically showing a configuration of server  5 . Server  5  includes a processor  30 , a storage  31  and a communication device  33 . Processor  30  executes processing operation using information stored in storage  31  and information obtained through communication device  33 . The processing operation in processor  30  is executed by software or hardware such as an electric circuit. 
     Various types of information are prestored in storage  31 , and information obtained through communication device  33  is also stored in storage  31 . A homepage information database  34 , a commodity information database  35 , a registered vehicle database  36 , and a deliverer information database  37  are, for example, stored in storage  31 . 
     Information about a homepage that can be accessed by user  9  through user terminal  4  is stored in homepage information database  34 . 
     Commodity information about each commodity put on a homepage is stored in commodity information database  35 . Information about a vehicle that can be specified as a delivery destination is stored in registered vehicle database  36 . For example, information such as a communication ID, a vehicle type and a color of each vehicle is stored. A communication ID of deliverer terminal  3  and the like are stored in deliverer information database  37 . 
     Communication device  33  exchanges various types of information with vehicle  2 , deliverer terminal  3  and user terminal  4  through the Internet  6 . 
       FIG. 5  is a side view showing a configuration of vehicle  2 . Vehicle  2  includes a vehicle main body  40 , a front wheel  41 , a rear wheel  42 , a battery  44 , a PCU  45 , and a motor  46 . 
     Battery  44  is a secondary battery that can charge and discharge electric power. Front wheel  41  is disposed more frontward than a center in a front-back direction of vehicle main body  40 . Rear wheel  42  is disposed more rearward than the center in the front-back direction of vehicle main body  40 . 
     PCU (Power Control Unit)  45  converts DC power from battery  44  to AC power and supplies the AC power to motor  46 . Using the supplied AC power, motor  46  is driven to rotate rear wheel  42 . As described above, vehicle  2  according to the first embodiment is typically an electric vehicle. Vehicle  2  may be a hybrid vehicle and the like. 
     A passenger compartment  47 , a front accommodation compartment  48  and a rear accommodation compartment  49  are formed in vehicle main body  40 . Front accommodation compartment  48  is formed more frontward of vehicle  2  than passenger compartment  47 . Rear accommodation compartment  49  is formed more rearward of vehicle  2  than passenger compartment  47 . 
     Vehicle main body  40  includes a floor panel  43 , a front-row seat  50 , a rear-row seat  51 , a rear hatch  52 , a front hatch  56 , a front door  57 , and a rear door  58 . 
     Floor panel  43  forms a bottom surface of vehicle  2 . Floor panel  43  includes a center floor panel  66 , a rear floor panel  67  and a partition wall  68 . 
     Center floor panel  66  forms a lower surface of passenger compartment  47 . Rear floor panel  67  forms a lower surface of rear accommodation compartment  49 . Passenger compartment  47  and front accommodation compartment  48  are separated by partition wall  68 . 
     Front-row seat  50  and rear-row seat  51  are provided in passenger compartment  47 . Rear-row seat  51  is disposed more rearward than front-row seat  50 . 
     Front door  57  and rear door  58  are provided on vehicle main body  40  so as to be openable and closable. By opening front door  57  and rear door  58 , a passenger can get in and out of passenger compartment  47 . 
     Rear-row seat  51  divides a space in vehicle  2  into passenger compartment  47  and rear accommodation compartment  49 . Rear hatch  52  is provided so as to be pivotable with respect to vehicle main body  40 . By opening rear hatch  52 , rear accommodation compartment  49  can be opened. Front hatch  56  is provided so as to be pivotable with respect to vehicle main body  40 . By opening front hatch  56 , front accommodation compartment  48  can be opened. 
     Vehicle  2  includes a cooling box  53 , a cooling circuit  54  and a cooling circuit  55 . Cooling circuit  54  is provided in a lower part of front accommodation compartment  48 . Cooling circuit  54  cools the air in passenger compartment  47 . 
       FIG. 6  is a schematic diagram schematically showing vehicle  2 . Cooling circuit  55  is disposed on the lower surface side of rear floor panel  67 , and cooling box  53  is disposed in rear accommodation compartment  49 . 
     Cooling circuit  55  cools the air in passenger compartment  47  and cools the air in cooling box  53 . 
     Vehicle  2  includes an ECU  60 , a communication device  61 , a position information acquisition device  62 , a storage  63 , a communication device  64 , and a locking device  65 . 
     Communication device  61  is configured to communicate with server  5  and the like through the Internet  6 . Communication device  61  transmits the obtained information to ECU  60 . Locking device  65  locks rear hatch  52  in a closed state, and releases a locked state of rear hatch  52 . 
     Communication device  64  is configured to communicate with deliverer terminal  3  located outside, a key of user  9  and the like. A communication distance of communication device  64  is, for example, approximately 1 meter and is shorter than a communication distance of communication device  61 . Communication device  64  is configured to receive an authentication signal sent from the key of user  9  and to receive an opening code and the like sent from deliverer terminal  3 . Communication device  64  transmits the received information to ECU  60 . 
     Storage  63  is a nonvolatile memory having various types of information stored therein. Position information acquisition device  62  is configured to obtain position information of vehicle  2 , and transmits the obtained position information to ECU  60 . ECU  60  executes processing operation using various types of information stored in storage  63 , the information obtained by communication device  61 , the position information obtained by position information acquisition device  62 , and the like, and controls driving of PCU  45  and the like. 
       FIG. 7  is a plan view showing a configuration of vehicle  2  on the rear side. Vehicle  2  includes a right side surface  70 , a left side surface  71  and a rear surface  72 . Rear hatch  52  is formed so as to extend from the rear surface  72  side toward the front of vehicle  2 . 
       FIG. 8  is a plan view when rear hatch  52  is omitted from the state shown in  FIG. 7 . Cooling box  53  is disposed at a center in a width direction of vehicle  2 . In  FIG. 8 , “O 1 ” represents a center line passing through the center in the width direction of vehicle  2  and extending in the front-back direction of vehicle  2 . In the example shown in  FIG. 8 , when vehicle  2  is viewed in a plan view, cooling box  53  overlaps with center line O 1 . 
     Vehicle  2  includes a right rear wheel  42 R provided on the right side surface  70  side, and a left rear wheel  42 L provided on the left side surface  71  side. Right rear wheel  42 R and left rear wheel  42 L are arranged in the width direction of vehicle  2 .  FIG. 9  is a perspective view showing the rear surface side of vehicle  2 , with rear hatch  52  being open. As is clear from  FIGS. 8 and 9 , cooling box  53  is located closer to rear surface  72  than passenger compartment  47 . 
       FIG. 10  is a perspective view schematically showing cooling box  53 . Cooling box  53  includes a main body  75  and lids  76  and  77 . A refrigerating compartment  78  and a freezing compartment  79  are formed in main body  75 . 
     Lids  76  and  77  are provided on an upper surface of main body  75 . Lid  76  is provided on main body  75  such that lid  76  can open and close an opening formed in an upper part of freezing compartment  79 . Lid  77  is provided on main body  75  such that lid  77  can open and close an opening formed in an upper part of refrigerating compartment  78 . 
       FIG. 11  is a plan view showing cooling circuit  55  and the like. When cooling circuit  55  and vehicle  2  are viewed in a plan view, cooling circuit  55  is located in rear accommodation compartment  49 . 
     Cooling circuit  55  includes a condenser  80 , a gas-liquid separator  81 , an expansion valve  82 , an evaporator  83 , a blower  84 , an evaporator  85 , a blower  86 , a compressor  87 , a refrigerant pipe  88 , and a refrigerant C. 
     Condenser  80  cools refrigerant C using the outdoor air. Gas-liquid separator  81  separates refrigerant C in a gas state from refrigerant C flowing through refrigerant pipe  88 , and supplies refrigerant C in a liquid state to expansion valve  82 . Expansion valve  82  adiabatically expands refrigerant C and supplies refrigerant C in a mist state to evaporators  83  and  85 . 
     Blower  84  blows the air in passenger compartment  47  on evaporator  83  to thereby cool the air in passenger compartment  47 . The cooled air is returned to passenger compartment  47 . 
     Blower  86  blows the air in cooling box  53  on evaporator  85 . As a result, the air in cooling box  53  is excellently cooled. The cooled air is returned to cooling box  53 . 
     As described above, cooling circuit  55  cools the air in passenger compartment  47  and cools the air in cooling box  53 . When vehicle  2  is viewed in a plan view, cooling circuit  55  is located in rear accommodation compartment  49 . Therefore, a distance between cooling box  53  and cooling circuit  55  is short, and thus, cooling circuit  55  can efficiently cool the air in cooling box  53 . 
     Delivery system  1  configured as mentioned above will be described. 
       FIG. 12  is a sequence diagram of delivery system  1 . User  9  operates user terminal  4  and specifies a commodity to be purchased and a delivery destination of the purchased commodity on a homepage. At this time, vehicle  2  is specified as the delivery destination of the purchased commodity. 
     Using user terminal  4 , user  9  can access a homepage, and purchase a commodity put on the homepage and specify a delivery destination of the purchased commodity. 
     User terminal  4  transmits request information including information about the commodity purchased by user  9  and delivery information to server  5  (Step  10 ). When server  5  obtains the request information, server  5  creates an opening code (Step  14 ). When server  5  creates the opening code, server  5  transmits the opening code to vehicle  2  (Step  16 ). When vehicle  2  receives the opening code (Yes in Step  20 ), vehicle  2  transmits position information to server  5  (Step  22 ). 
     When server  5  obtains the position information from vehicle  2 , server  5  transmits registered vehicle information of vehicle  2 , the delivery information and the opening code to deliverer terminal  3  (Step  28 ). 
     When deliverer terminal  3  receives the registered vehicle information, the delivery information and the opening code from server  5 , deliverer terminal  3  notifies deliverer  7  that these pieces of information have been received (Step  30 ). 
     The registered vehicle information includes, for example, information about a type, a color and the like of vehicle  2 . The delivery information includes the information about the commodity purchased by user  9 , the position information of vehicle  2  as the delivery destination, and the delivery time. The opening code is an opening signal for unlocking locking device  65  of vehicle  2 . 
     Deliverer  7  moves close to vehicle  2 , based on the position information of vehicle  2 . Then, deliverer  7  can come very close to vehicle  2  with reference to the type, the color and the like of the vehicle included in the vehicle information. 
       FIG. 13  is a schematic diagram showing, in a plan view, a state in which deliverer  7  has come very close to vehicle  2 . In the example shown in  FIG. 13 , vehicle  2  is parked forward. For example, in Europe, the United States and the like, forward parking is common when parking a vehicle. Therefore, deliverer  7  can easily come close to rear hatch  52 .  FIG. 14  is a schematic diagram showing a state in which deliverer  7  has come close to rear hatch  52 . Referring to  FIGS. 14 and 12 , deliverer  7  operates deliverer terminal  3  and transmits the opening code from communication device  13  to communication device  64 . A distance that allows communication between communication device  64  and communication device  13  is, for example, approximately 1 meter. 
     When communication device  64  receives the opening code, communication device  64  transmits the received opening code to ECU  60 . ECU  60  determines whether or not the opening code matches with the opening code received in Step  20  (Step  40 ). When ECU  60  determines that the opening code matches with the opening code received in Step  20  (Yes in Step  40 ), ECU  60  releases the locked state by locking device  65  (Step  50 ). As a result, deliverer  7  can put delivery item W into cooling box  53 . 
     As shown in  FIGS. 8 and 9 , cooling box  53  is located closer to rear surface  72  of vehicle  2  than passenger compartment  47 . Therefore, deliverer  7  can easily put delivery item W into cooling box  53 . 
     Furthermore, cooling box  53  is disposed at the center in the width direction of vehicle  2 . Therefore, even when delivery item W is put into cooling box  53 , disturbance of the weight balance of vehicle  2  in the width direction can be suppressed. In addition, lids  76  and  77  of cooling box  53  are provided on the upper surface side of cooling box  53 . Therefore, deliverer  7  can easily put delivery item W into refrigerating compartment  78  or freezing compartment  79 . 
     Although the case of forward parking of vehicle  2  has been described in the example shown in  FIG. 13 , the case of reverse parking of vehicle  2  is also conceivable. In such a case, it is possible to reduce the possibility that cooling box  53  is visible to other surrounding people when delivery item W is put into cooling box  53 . As a result, the privacy of user  9  is easily protected. 
     Second Embodiment 
     A vehicle  2 A according to a second embodiment will be described with reference to  FIG. 15  and the like. Similarly to vehicle  2  according to the first embodiment, vehicle  2 A according to the second embodiment can also be specified as a delivery destination of delivery item W in delivery system  1 . 
       FIG. 15  is a plan view showing a part of vehicle  2 A according to the second embodiment.  FIG. 16  is a perspective view of vehicle  2 A, with rear hatch  52  being open. 
     Vehicle  2 A includes a cooling box  53 A. Cooling box  53 A is accommodated in rear accommodation compartment  49  and is located closer to rear-row seat  51  (passenger compartment  47 ) than rear surface  72 . A rear surface of rear-row seat  51  is provided with a take-out door  90 . 
       FIG. 17  is a front view showing rear-row seat  51 . Rear-row seat  51  includes a rear side seat  91 , a rear side seat  92 , an arm rest  93 , and a head rest  100 . 
     Rear-row seat  51  includes a head rest  94 , a seat back  95  and a seat cushion  96 . Rear side seat  92  includes a head rest  97 , a seat back  98  and a seat cushion  99 . Head rest  100  is disposed above arm rest  93 . 
       FIG. 18  is a front view of rear-row seat  51 , with arm rest  93  being rotated down and disposed on seat cushions  96  and  99 . 
     When arm rest  93  is moved down, take-out door  90  is exposed to the passenger compartment  47  side. By opening take-out door  90 , the passenger can reach cooling box  53 A and take out a contained object from cooling box  53 A. 
     According to vehicle  2 A, the passenger can take out delivered delivery item W inside vehicle  2 A, and thus, the passenger&#39;s convenience is improved. 
     Furthermore, cooling box  53 A is disposed between right rear wheel  42 R and left rear wheel  42 L. Therefore, even when vehicle  2 A receives side collision, damage of cooling box  53 A can be suppressed. 
     A vehicle  2 B which is a modification of the vehicle according to the second embodiment will be described with reference to  FIGS. 19 to 22 . 
       FIG. 19  is a plan view showing the rear side of vehicle  2 B.  FIG. 20  is a perspective view showing a configuration of a cooling box  53 B and its surroundings. 
     Vehicle  2 B includes cooling box  53 B and rails  110  and  111 . Rails  110  and  111  are disposed on a bottom surface of rear accommodation compartment  49  of vehicle  2 B. Rails  110  and  111  are provided so as to extend in the front-back direction of vehicle  2 B. 
     Cooling box  53 B rests on rails  110  and  111  and is provided so as to be movable in a direction of extension of rails  110  and  111 . 
       FIG. 21  is a perspective view showing a state in which cooling box  53 B is disposed on the rear surface  72  side.  FIG. 22  is a perspective view showing a state in which cooling box  53 B is disposed on the rear-row seat  51  side. 
     In this way, cooling box  53 B is provided so as to be movable between the rear surface  72  side and the rear-row seat  51  (passenger compartment  47 ) side of vehicle  2 B. 
     Therefore, for example, when user  9  requests deliverer  7  to deliver delivery item W, user  9  disposes cooling box  53 B on the rear surface  72  side as shown in  FIG. 21 . Thus, deliverer  7  can easily put delivery item W into cooling box  53 B. 
     For example, when user  9  gets in vehicle  2 B and drives vehicle  2 B, user  9  moves cooling box  53 B to the rear-row seat  51  side as shown in  FIG. 22 . Thus, user  9  can open take-out door  90  and take out the object contained in cooling box  53 B from the passenger compartment  47  side. 
     Although the case of disposing cooling box  53  at the center in the width direction of the vehicle has been described in the first and second embodiments above, cooling box  53  may be disposed on one side surface side.  FIG. 23  is a plan view showing an example in which cooling box  53  is disposed on the right side surface  70  side.  FIG. 24  is a plan view showing an example in which cooling box  53  is disposed on the left side surface  71  side. 
     While the embodiments of the present disclosure have been described, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present disclosure is defined by the terms of the claims and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.