JP2006248281A - Electric carrying vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric carrying vehicle which is convenient for baggage fall prevention during being carried, and loading and unloading of a wheelchair or heavy load. <P>SOLUTION: The electric carrying vehicle is composed of a low-center of gravity undercarriage wherein front wheels 5 and rear wheels 6 are disposed at the fore-and-aft position of both right and left sides, a loading platform is disposed at the front side, a driver's stand is disposed at the rear side, and a guard preventing the baggage from falling from the loading platform is provided. The guard is turnably supported on an undercarriage frame 2A in a state where the top surface is made to be approximately flat shape, and rises upward to prevent the baggage from falling, and a slope state inclined downward to the front of the undercarriage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric transport vehicle that a driver gets on and operates, and more particularly to an electric transport vehicle that is convenient for loading and unloading wheelchairs and other luggage.

A large drive wheel that is rotated by a mechanical power transmission system (small gear, large gear, belt between both) connected to an electric motor that uses a storage battery as a power source is arranged at the lower front part of the electric vehicle body, and the electric vehicle A small wheel of the caster is arranged at the lower rear part of the main body, an operation handle is provided at the upper end via a direction changing mechanism and a rod-shaped connecting mechanism above the caster, and an electric system operator is provided at the upper rear end of the electric vehicle main body. There is an electric vehicle in which a driver boarding floor is formed between an operation handle and an electric operation element, and a front side is a loading platform from the operation handle. (For example, refer to Patent Document 1).
JP-A-8-72560

  The thing of this patent document 1 is that the front wheel is a large drive wheel driven by an electric motor, the rear wheel is composed of a small carrier operated by a handle, and the storage battery 4 is placed on the lower surface of the cargo bed 14 at the rear upper position of the large diameter front wheel. The rear wheel direction changing mechanism 16 is disposed in a space below the driver boarding floor 15. For this reason, the loading platform 14 and the driver boarding floor 15 are arranged at a position far higher than the front wheels having a large diameter, and it is very inconvenient to load and unload luggage on the loading platform 14, When a wheelchair is loaded and unloaded, it cannot be rolled and loaded using the rotation of its wheels. Moreover, since the center of gravity is at a high position, it is not preferable in terms of stability when a load is loaded. Further, since the electric system operator is arranged behind the driver boarding floor 15, the electric operator is operated in a state of standing on the driver boarding floor 15 as a posture in which the driver operates the operation handle 10. It is hard to say that it was configured as such.

  In view of such a point, the present invention provides an electric transport vehicle that is convenient for preventing a load being dropped from being transported and for loading and unloading a wheelchair or a heavy object. In this case, it is configured such that a convenient slope can be formed for loading and unloading wheelchairs and heavy objects by a guard that prevents the cargo being transported from falling from the loading platform.

  In addition, when loading and unloading a wheelchair, a low bed surface is formed so that it can be rolled and unloaded using the rotation of its wheels, thereby obtaining a low center of gravity and loading wheelchairs and other loads. Provided is an electric transport vehicle that can ensure stability in an open state. Furthermore, the present invention provides an electric transport vehicle having a low center of gravity that enables stable transport even when a person is in a wheelchair.

  According to a first aspect of the present invention, front wheels and rear wheels are disposed in front and rear positions on both left and right sides of a chassis in which a loading platform is disposed on the front side and a cab is disposed on the rear side, and on the front side of the cab on the rear side of the loading platform. A handle for left / right rotation operation of the front wheel is disposed, and the left and right rear wheels are supported by output shafts of respective DC motor devices attached to the left and right side portions of the chassis and are driven to rotate by the DC motor device, A guard is provided at the front end of the cargo bed to prevent the cargo on the cargo bed from falling. The guard has a substantially flat upper surface and rises upward to prevent the cargo on the cargo bed from falling. It is characterized in that it is pivotally supported by the chassis frame so as to be able to rotate in a slope state that is inclined to the front of the vehicle.

  According to a second aspect of the present invention, front wheels and rear wheels are disposed at front and rear positions on both left and right sides of a chassis in which a loading platform is disposed on the front side and a cab is disposed on the rear side. A handle for left / right rotation operation of the front wheel is disposed, and the left and right rear wheels are supported by output shafts of respective DC motor devices attached to the left and right side portions of the chassis and are driven to rotate by the DC motor device, The front wheel and the rear wheel are configured with wheels having substantially the same diameter, and the level of the chassis that forms the floor of the cargo bed is arranged at a position that is approximately the same height as the axle level of the front wheel and the rear wheel, A guard is provided at the front end of the cargo bed to prevent the cargo on the cargo bed from falling. The guard has a substantially flat upper surface and rises upward to prevent the cargo on the cargo bed from falling. The slanted slope Characterized in that it is axially supported rotatably chassis frame and-loop state.

  According to a third invention, in the first or second invention, the guard is composed of a guard frame surrounding the periphery and a guard plate disposed on the upper surface of the guard frame, and the base of the guard frame is the It is the structure supported by the chassis frame so that rotation was possible by the shaft support part.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the guard is integrated with a bumper provided at a front end portion of the chassis frame and can be rotated by a shaft support portion on the chassis frame. It is the structure supported by.

  In the first invention, the guard can provide an electric transport vehicle that is convenient for preventing the falling of a load being transported and for loading and unloading a wheelchair or a heavy object. In this case, it is possible to form a convenient slope for loading and unloading wheelchairs and heavy objects by the guard that prevents the cargo being transported from falling from the loading platform. Effective for both loading and unloading of slope boards, it is effective.

  In the second invention, since the front wheel and the rear wheel are composed of wheels having substantially the same diameter, it is easy to form a substantially horizontal low load surface, and a low center of gravity is obtained, and loading and unloading of luggage and wheelchairs is performed. It becomes an easy form and becomes an electric conveyance vehicle which can ensure the stable conveyance in the state which loaded the wheelchair and other loads. In addition, a guard that prevents the cargo being transported from falling from the loading platform can form a slope that is convenient for loading and unloading of wheelchairs and heavy objects. It can be used effectively for both slope board which is convenient for loading and unloading. The low center of gravity is suitable for a wheelchair that can be rolled and unloaded using the rotation of its wheels. In particular, it is possible even when a person is on the wheelchair.

  In the third aspect of the invention, in addition to the effects of the first aspect of the invention or the second aspect of the invention, the guard is composed of a guard frame that goes around the periphery and a guard plate disposed on the upper surface of the guard frame. Since the guard plate can be held stably and the guard plate forms a substantially flat slope, it becomes a convenient slope plate for loading and unloading of wheelchairs and heavy objects, and the guard plate prevents falling of small items loaded on the loading platform Is also effective.

  In the fourth aspect of the invention, in addition to the effects of the first to third aspects of the invention, the guard and the bumper are integrated so that the both can be rotated at the front end portion of the chassis frame by the shaft support portion. Thus, the lower part of the guard is reinforced by the bumper, and the attachment of the guard and the bumper to the chassis frame is simplified.

  In the present invention, a front wheel and a rear wheel are disposed at front and rear positions on both left and right sides of a chassis in which a loading platform is disposed on the front side and a cab is disposed on the rear side, and the front wheel is disposed on the front side of the cab on the rear side of the loading platform. The left and right rear wheels are supported on the output shafts of the DC motor devices attached to the left and right sides of the chassis, and are driven to rotate by the DC motor devices. A guard is provided at the front end of the cargo bed to prevent the cargo on the cargo bed from falling. The guard has a substantially flat upper surface and rises upward to prevent the cargo on the cargo bed from falling. In the following, an embodiment of the present invention will be described.

  An embodiment of the present invention will be described with reference to the drawings. Each figure shows an embodiment of an electric transport vehicle according to the present invention, FIG. 1 is a rear perspective view showing a basic form including a chassis structure of the electric transport vehicle according to the present invention, and FIG. 2 is an electric drive according to the present invention. FIG. 3 is a front perspective view showing a basic configuration including a chassis structure of a transport vehicle, FIG. 3 is a left side view showing a basic configuration including a chassis structure of an electric transport vehicle according to the present invention, and FIG. 4 is a front view of the electric transport vehicle according to the present invention. FIG. 5 is a rear perspective view of the electric transport vehicle according to the present invention, FIG. 6 is a perspective view showing the arrangement of the electric system control unit of the control tower provided with the handle of the electric transport vehicle according to the present invention, and FIG. FIG. 8 is a perspective view showing a configuration of a lower end portion of a handle shaft of an electric conveyance vehicle according to the present invention, and FIG. 9 is a diagram according to the present invention. FIG. 10 is a perspective view showing the configuration of the front wheel rotation mechanism of the electric transport vehicle. FIG. 10 is a front wheel rotation mechanism. FIG. 11 is a diagram showing the configuration of the front wheel support portion with respect to the chassis frame, FIG. 12 is a bottom view showing the relationship of the front wheel support member with respect to the chassis frame, FIG. 13 is a perspective view of the rear wheel drive portion, and FIG. FIG. 15 is a partial enlarged view of the rear wheel drive unit, and FIG. 15 is an electric circuit diagram.

  1 is an electric transport vehicle according to the present invention, in which a loading platform 3 is disposed on the front side and a cab 4 is disposed on the rear side, side walls 1A are disposed on the left and right sides so as to gradually increase from the front to the rear, A front wheel 5 and a rear wheel 6 are disposed at the front and rear positions, and a control tower 9 having a handle 7 and an electric system control unit 8 for turning the front wheel 5 in the left-right direction is disposed on the front side of the cab 4. The chassis 2 of the electric transport vehicle 1 includes a loading platform 3, a cab 4, a control tower 9 having a handle 7 provided at a rear side of the cab 4 on the rear side of the loading platform 3, a front wheel 5 that is operated by a handle, The rear wheel 6 driven by the electric motor and the storage battery 11 for supplying electric power to the electric motor are provided, and the vehicle body frame 2A serving as a base and an exterior member covering the vehicle body frame 2A are configured. The height of the handle 7 from the floor of the cab 4 is a height at which the driver can easily drive with the driver standing on the cab 4.

  The chassis frame 2A forms a floor portion 3A of the loading platform 3 and a floor portion 4A of the cab 4 and is configured such that side wall portions 2C serving as base members of the sidewall 1A are formed on both the left and right sides. The floor portion 4A of the cab 4 is formed in a substantially horizontal state by the chassis frame 2A. The exterior member that covers the chassis frame 2A is, as will be described later, a flooring 3B fixed on the floor 3A of the cargo bed 3 with screws N1, and a screw N2 on the floor 4A of the cab 4 The floor frame 4A that is stopped, the outer wall 2C1 that is fixed to the side wall 2C with screws N3 so as to cover the outer side of the side wall 2C of the chassis frame 2A, and the left and right inner surfaces of the loading platform 3 are formed. The inner wall 3C1 fixed to the side wall 2C of the vehicle body 2C by the screw N4, the inner wall 3C2 fixed to the side wall 2C of the chassis frame 2A by the screw N6 so as to form the inner wall of the loading platform 3, and the left and right sides of the cab 4 An inner wall 4C1 fixed to the side wall 2C of the chassis frame 2A with a screw N5 so as to form an inner surface, and an inner wall 4C2 fixed to the chassis frame 2A with a screw N7 so as to form a back wall of the cab 4 It has.

  The front wheel 5 and the rear wheel 6 are arranged at the front and rear positions on both the left and right sides of the chassis 2, and the left and right sides of the chassis 2 are positioned so that the handle 7 for turning the front wheel 5 between the left and right is positioned between the loading platform 3 and the cab 4. Is arranged on the rear side of the loading platform 3 and on the front side of the cab 4 in the central portion. The handle 7 is disposed on the front side of the cab 4 on the rear side of the load platform 3 in the left and right central portions of the chassis 2 so as to be positioned between the load platform 3 and the cab 4. On both the left and right sides of the chassis 2, driving DC motor devices 10 are attached to mounting portions provided on the chassis frame 2 A by appropriate fixing means such as screws N 8, and the rotational output shafts of the respective driving DC motor devices 10. The axle 6A of the left and right rear wheels 6 is attached to 10B. A storage battery 11 for supplying power to the DC motor 10A of each driving DC motor device 10 is attached to the left and right side portions of the chassis 2 between the front wheel 5 and the rear wheel 6, whereby the storage battery 11 is located behind the cargo bed 3. Correspondingly arranged on the left and right sides of the part.

  As a result, the front wheels 5 are arranged on the left and right sides of the loading platform 3 at positions closer to the front side of the loading platform 3, while the left and right rear wheels 6 are arranged corresponding to the left and right sides of the cab 4. Each DC motor device 10 for driving is arranged corresponding to both the left and right sides of the front of the cab 4 at a slightly forward position of the axle 6A of the rear wheel 6 due to the connection relationship between the rotation output shaft 10B and the axle 6A of the rear wheel 6. It is the state that was done. With this configuration, the rear wheel 6 is a driving wheel and the front wheel 5 is a steering wheel, so that the weight of the driver who rides on the cab 4 is received mainly by the rear wheel 6, Even when the vehicle is not mounted, stable driving can be obtained by sufficient resistance that the weight of the driver receives the weight of the driver and the rear wheel 6 contacts the floor or the ground.

  The storage battery 11 is arranged on the inner side of the line connecting the outer surface of the front wheel 5 and the rear wheel 6 facing in the straight direction, so that the storage battery 11 is kept in a state of not protruding outward from the outer surface of the front wheel 5 and the rear wheel 6. ing. For this reason, the storage battery 11 is less likely to collide with other objects appearing on the side surface of the electric transport vehicle 1 due to the travel of the electric transport vehicle 1, and it becomes easy to drive. The level of the chassis 2 that forms the floor 3A of the cargo bed 3 is a low center of gravity structure that is disposed at a position that is approximately the same height as the levels of the axles 5A and 6A of the front wheels 5 and the rear wheels 6. For this reason, it will be in the state which is easy to carry out the loading and unloading work of the wheelchair and other things to the loading platform 3. And, if the level of the chassis 2 is too low, the bottom of the chassis 2 collides with the uneven part of the road surface during traveling, and it becomes an obstacle to traveling, and there is also a danger due to sudden braking due to the collision, In the present invention, since the bottom of the chassis 2 can be kept at a moderate distance from the road surface, such a problem is also solved.

  Similarly to the loading platform 3, the level of the chassis 2 that forms the floor of the cab 4 is arranged at a position that is approximately the same level as the levels of the axles 5 </ b> A and 6 </ b> A of the front wheels 5 and the rear wheels 6. A low center of gravity structure can be obtained. In order to achieve this, the illustrated chassis frame 2A includes a vertical frame member 2A1 extending in the front-rear direction, a horizontal frame member 2A2 that intersects the frame frame 2A, and a peripheral frame member 2A3 that forms a peripheral portion. 3A and the floor 4A of the cab 4 are formed as a series of planes in the front-rear direction. In this way, the floor portions of both the loading platform 3 and the cab 4 formed on the chassis 2 are formed in a substantially identical plane by the series of chassis frames 2A. And the floor part of the loading platform 3 and the cab 4 is formed in this chassis frame 2A at the substantially same height as the level which connects the axles 5A and 6A of the left and right front wheels 5 and the rear wheels 6. As a result, the configuration of the chassis frame 2A is simplified, and the chassis frame 2A has a strong structure, so that stable travel can be achieved together with stable loading of heavy objects.

  The front wheel 5 and the rear wheel 6 are wheels in which rubber tires that keep swelling with air are attached to the outer periphery of a metal wheel, and the front wheel 5 and the rear wheel 6 are configured by wheels having substantially the same diameter, Thus, considering the stability of loading and unloading of luggage on the loading platform 3 and traveling stability, the level of the floor of the loading platform 3 and the cab 4 is substantially the same as the level connecting the axles 5A and 6A of the front wheels 5 and the rear wheels 6. Is formed. As an example of achieving this object, the centers of the axles 5A and 6A of the front wheel 5 and the rear wheel 6 having substantially the same diameter have a low center of gravity so that the height from the ground is 150 mm to 160 mm. Accordingly, the floor portions of the loading platform 3 and the cab 4 are approximately 150 mm to 160 mm from the ground, and have a low center of gravity configuration.

  With this low center of gravity configuration, the wheelchair can be loaded from the front of the loading platform 3 by rolling the left and right wheels. When the wheelchair is placed on the loading platform 3 (see FIG. 18), it is provided on the floor of the loading platform 3 or the like. What is necessary is just to comprise so that the wheelchair may be fixed with the appropriate wheelchair fixing tool. If the lateral width of the loading platform 3 is slightly wider than the lateral width of the wheelchair, the left and right sidewalls of the loading platform 3 will be effective as the left and right movement restriction walls of the loaded wheelchair. It is effective as the transport vehicle 1. Moreover, if the hollow which fits both right and left wheels of a wheelchair is formed in the floor of the loading platform 3, and it fixes with the said wheelchair fixing tool in the state which both the left and right wheels of the wheelchair were fitted in this hollow, the movement of the wheel of a wheelchair will move back and forth by this hollow. It is limited and can maintain a more stable loading state. In addition, what is necessary is just to cover this hollow with a flat plate, when loading a general load.

  Each driving DC motor device 10 includes a DC motor 10A, a gear device 10C that is combined with the rotating shaft of the DC motor 10A and rotates the output shaft 10B, and a gear (not shown) attached to the rotating shaft of the DC motor 10A. 1) and a clutch device 10D for attaching and detaching the meshing of the gear (not shown) of the gear device 10C. Clutch device 10D detaches and engages a gear (not shown) attached to the rotating shaft of DC motor 10A and a gear (not shown) of gear device 10C by external operation of clutch lever 10D1. Note that a switch 10E for turning on and off the electric circuit by the clutch lever 10D1 is provided, and the clutch lever 10D1 is in a state in which the clutch device 10D is inserted (the gear attached to the rotating shaft of the DC motor 10A and the gear of the gear device 10C). Switch 10E is turned on and the clutch lever 10D1 is disengaged (the gear attached to the rotating shaft of the DC motor 10A is disengaged from the gear of the gear device 10C). ), The switch 10E is turned off.

  The handle 7 is provided at the upper end portion of the handle shaft 9B, and the handle shaft 9B rotates left and right as the handle 7 rotates left and right. The handle shaft 9B is rotatably supported by a column 9A attached to the chassis frame 2A. Specifically, the lower part of the cylindrical column 9A is supported by an oblique support member 2E fixed to the two vertical frame members 2A1 of the chassis frame 2A by welding or screws, respectively. It has been. The upper part of the cylindrical column 9A is attached to a support bar 2D across the left and right side walls 2C of the chassis frame 2A by welding or screws. The handle shaft 9B includes a lower handle shaft portion 9B1 supported by a bearing in a cylindrical column 9A so as to be rotatable left and right, and a connecting portion 9D at an upper position of the lower handle shaft portion 9B1 at a position above the support bar 2D. The upper handle shaft portion 9B2 is connected, and the handle 7 is provided at the upper end of the upper handle shaft portion 9B2. For this reason, the upper handle shaft portion 9B2 and the lower handle shaft portion 9B1 rotate to the left and right as the handle 7 is turned to the left and right, and the front wheel 5 changes its direction to the left and right as will be described later.

  The periphery of the upper handle shaft portion 9B2 is covered with a decorative cover 9C, and an electric system control unit 8 is disposed on the upper part of the decorative cover 9C. The handle 7, the electric system control unit 8, and the decorative cover 9C are included. As a whole, a control tower 9 is configured to rotate left and right simultaneously with the handle 7. For this reason, as described above, the control tower 9 including the handle 7 is placed at the rear side of the loading platform 3 at the front side position of the cab 4. For this reason, the handle shaft 9B is rotated left and right by rotating the handle 7 to the left and right. In the cover 9C, lead wires connected to the electric system controller 8 are arranged.

  A headlight 14 and a taillight 15 are respectively attached to the front end portion and the rear end portion of the left and right side wall portions 2C of the chassis frame 2A, and necessary wiring for the storage battery 11 is provided. The control tower 9 is provided with a switch 16 for turning on and off the headlight 14 and taillight 15 by the driver, and a charging terminal 11A of the storage battery 11.

  The arrangement of the cab 4 and each driving DC motor device 10 is such that the load of each driving DC motor device 10 and the weight of the driver riding on the cab 4 are mainly applied to the rear wheels 6 rather than the front wheels 5. It is composed. The storage battery 11 is attached to the left and right side portions of the chassis 2 between the front wheel 5 and the rear wheel 6, and the load of the storage battery 11 is close to the rear wheel 6 as described above, but the front wheel 5 and the rear wheel 6. This is a low center of gravity configuration. As a result, when the driver rides on the driver's cab 4, the load can be balanced in both the state where no load is loaded on the load platform 3 and the state where the load is loaded. I can run.

  Below the handle 7, that is, below the control tower 9, an electrical box 17 is mounted on the chassis frame 2A. This attachment is attached to the support member 2E fixed to the chassis frame 2A by welding or screws so as to support the support column 9A. The electric system control unit 8, each DC motor 10A, the switch 10E of the clutch device 10D, the charging terminal 11A of the storage battery 11, the forward / backward switching device 12, the power switch 13, the headlight 14, the taillight 15, the switch 16, etc. It is connected to the storage battery 11 via the switchboard of the box 17.

  By operating the handle 7, the handle shaft 9B is rotated to the left and right, whereby the front wheel 5 is rotated to the left and right. Hereinafter, this mechanism will be described. A rotating body 18 protruding left and right is fixed to the lower end portion of the columnar handle shaft 9B protruding downward from the cylindrical support column 9A by welding or screws. One end of each of the front and rear operation rods 19 is rotatably coupled to the shaft support portion 24. The front wheel 5 has an axle 5A rotatably supported by a horizontal shaft 22A of an axle member 22, and the axle member 22 is provided on a support member 20 disposed close to the lower side of the lateral frame member 2A2 of the chassis frame 2A. The shaft is supported on the vertical longitudinal axis portion 21 so as to be rotatable left and right. One end of a left / right actuating rod 23 is rotatably coupled to an arm portion 22B extending rearward from the axle member 22 by a shaft support portion 25. The other end of each front / rear actuating rod 19 is coupled to the left and right portions of a rotating body 27 that is pivotally coupled to the lateral frame member 2A2 of the chassis frame 2A by a shaft support 26 by a shaft support 28. Has been. The rotating body 27 is disposed at a central portion between the left and right front wheels 5, 5, and in this state, the front / rear operation rod 19 extends in a substantially parallel state in the front / rear direction at the left / right central portion of the chassis 2. The other end of the left and right actuating rod 23 is coupled to a rotating body 27 by a shaft support portion 29 so as to be rotatable.

  In this configuration, if the handle 7 is rotated to the left, the left front / rear operation rod 19 is retracted, and the right front / rear operation rod 19 is advanced to rotate the rotation body 27 to the left. 23 is pulled rightward, and the right and left operating rods 23 are pushed rightward. By this operation, the left and right front wheels 5 are rotated leftward about the vertical axis portion 21. In this state, the electric transport vehicle 1 traveling forward turns to the left. Further, if the handle 7 is rotated to the right, the front wheel 5 is rotated to the right about the vertical axis 21 by the reverse operation to the above, and the electric guided vehicle 1 traveling forward turns to the right. Will be.

  The support member 20 to which the axle member 22 is rotatably attached has a center portion of the support member 20 supported by a shaft support portion 31 rotatably on a front and rear support portion 30 suspended from the horizontal frame member 2A2. Thus, the support member 20 is disposed close to the lower side frame member 2A2 of the chassis frame 2A while maintaining the gap G. For this reason, the left and right sides of the support member 20 can move up and down with respect to the chassis frame 2A around the shaft support portion 31. A rubber cushion material 32 is attached to the lower surface of the horizontal frame member 2A2 at equal left and right positions. When the support member 20 is in a horizontal state with respect to the horizontal chassis frame 2A, the support member 20 and the cushion material are disposed. A slight gap 33 is formed between the first and second members 32. When the unevenness of the road surface is small, the width of the vertical movement of the front wheel 5 is small, and the support member 20 moves up and down within the gap 33 around the shaft support portion 31 as the front wheel 5 moves up and down. Do not push 2A upward. For this reason, when the front wheel 5 moves up and down due to road surface unevenness, the gap 33 serves as a working space that absorbs the road surface unevenness with respect to the chassis frame 2A.

  The rear wheel 6 moves up and down according to the unevenness of the road surface, whereby the rear part of the chassis frame 2A moves up and down, but the gap 33 on the side of the front wheel 5 exerts its absorbing effect on some unevenness of the road surface. Therefore, the shaking of the entire electric transport vehicle 1 is mitigated. When the road surface is uneven, the width of the vertical movement of the front wheel 5 increases, the support member 20 collides with the cushion material 32, the support member 20 pushes the lateral frame member 2A2 upward, and the chassis frame 2A moves upward. Although pushed, when the road surface has little unevenness, the shaking of the chassis frame 2A becomes small, and the electric transport vehicle 1 can travel stably.

  Note that the pair of left and right adjustment rods 34 screwed to one of the front and rear support portions 30 restricts the back and forth movement of the support member 20, so that the support member 20 can stably move up and down around the shaft support 31. Can do.

  As described above, the chassis frame 2 </ b> A has a configuration in which the floor 3 </ b> A of the loading platform 3 and the floor 4 </ b> A of the cab 4 are formed, and the side walls 2 </ b> C are formed on both the left and right sides. A substantially flat flooring 3B is fixed to the chassis frame 2A with screws N1 on the upper surface of the floor 3A of the loading platform 3, and a substantially flat flooring 4B is secured to the chassis frame 2A on the upper surface of the floor 4A of the cab 4. 2A is fixed with screws N2 to form respective floor surfaces. Further, the outer wall 2C1 is fixed to the side wall 2C with screws N3 so as to cover the outer side of the side wall 2C, and the inner wall 3C1 is fixed to the side walls 2C with screws N4 so as to form the left and right inner walls of the cargo bed 3. The inner wall 3C2 is fixed to the support bar 2D across the left and right side wall portions 2C with screws N6 so as to form the inner wall of the loading platform 3. In this way, the side wall 1A is formed. Then, the inner wall 4C1 is fixed to the left and right side walls 2C with screws N5 so as to form the left and right inner walls of the cab 4, and the support rail 2D extending over the left and right side walls 2C so as to form the inner wall of the cab 4. The inner wall 4C2 is fixed with a screw N7. With this configuration, a partition wall between the loading platform 3 and the cab 4 is configured by the inner wall 3C2 and the inner wall 4C2 attached to the support rail 2D, and the control tower 9 protrudes above the partition wall. .

  In the illustrated form, the inner side wall 4C1 that forms the left and right inner side walls of the cab 4 is constituted by the inner side wall 3C1 that forms the left and right inner side walls of the loading platform 3 and a series of substantially flat plates. The structure is reduced and installation is simplified. Further, the outer wall 2C1 that covers the outside of the side wall 2C integrally forms the front and rear fender portions 41 and 42 that cover the front and rear wheels 5 and 6, and the storage battery 11 at the intermediate portion between the front and rear fender portions 41 and 42. Covering. The flooring 3B is preferably made of metal in terms of strength for loading luggage, and the flooring 4B is also preferably made of metal in terms of strength because the driver stands and operates. Further, the outer wall 2C1 can be made of metal, but considering the appearance design including the fender portions 41 and 42, FRP (glass fiber reinforced) considering the synthetic resin injection molded product or strength. Synthetic resin) is preferable. The inner side wall 3C1, the inner side wall 3C2, the inner side wall 4C1, and the inner side wall 4C2 may be made of metal, but are made of a synthetic resin injection molded product or FRP (glass fiber reinforced synthetic resin) in consideration of strength. You can also

  An electric system control unit 8 is provided in the upper part of the control tower 9. This electric system control unit 8 is disposed in the upper part of the control tower 9 and adjusts the applied voltage or current to each DC motor 10A, and a speed setting device 39 which is arranged in the vicinity of the handle 7 and is operated by the driver. The switch device 12 that operates with the levers 12A and 12B, the switch button 43 that sounds on the horn in the ON state, and the display unit 44 that displays the charging state of the storage battery 11, which are arranged on the upper panel of the control tower 9, The operation knob 40 of the speed setting device 39 and the display section 38 related thereto, the switch 16 for simultaneously turning on and off the headlight 14 and the taillight 15, and the charging of the storage battery 11 disposed on the upper rear side of the control tower 9. A charging terminal 11A for connecting the cable 11B, a power switch 13 and the like are included. The charging terminal 11 </ b> A of the storage battery 11 has a configuration in which a nut member provided at an end of the charging cable 11 </ b> B connected to the commercial power supply is screwed.

  Each DC motor 10A is configured to be in an operating state of rotating when all of the power switch 13, the changeover switch device 12, and the switch 10E of the clutch device 10D are turned on (ON). As a result, the check for starting the driving of the rear wheel 6 can be performed in three stages. That is, since it is possible to confirm whether these three switches are ON or OFF, it is excellent in ensuring safety when starting traveling forward or backward. This specific electric circuit is shown in FIG. 15. When the movable piece of the forward / backward changeover switch device 12 is connected to the contact a, each DC motor 10A rotates in the forward direction and the rear wheel 6 rotates in the forward direction. Then, the electric transport vehicle 1 moves forward. When the movable piece of the forward / backward changeover switch device 12 is connected to the contact b, each DC motor 10A rotates in the reverse direction, the rear wheel 6 rotates in the reverse direction, and the electric transport vehicle 1 moves backward. .

  Thus, the electric transport vehicle 1 can move forward or backward when each DC motor 10A is in an operating state, but each DC motor 10A includes a power switch 13, a changeover switch device 12, and a clutch device 10D. When all the switches (that is, the switch 10E of the clutch device 10D) are turned on, the driving state in which the rear wheel 6 rotates is set. When the driver turns on the power switch 13, turns on the clutch device 10D (switch 10E is turned on), and the driver holds the right lever 12A with the hand holding the right handle 7, the changeover switch device Since the 12 movable pieces are turned on at the contact a and each DC motor 10A rotates in the forward direction, the electric transport vehicle 1 moves forward at a predetermined speed.

  This speed can be set to the speed of the memory by turning the knob 40 of the speed setting device 39 provided on the upper panel of the control tower 9 and adjusting it to an arbitrary position in the memory of the speed display section 38. The speed setting device 39 turns the knob 40 to increase or decrease the current or voltage supplied to each DC motor 10A, and this speed can be controlled in the range of 2 to 15 km / h. If the lever 12A of the changeover switch device 12 is removed, the electric transport vehicle 1 has an internal resistance of each DC motor device 10 for driving, that is, an electric working between the rotor and the stator of the DC motor 10A. It stops by resistance and mechanical resistance by gear apparatus 10C etc. In addition, in order to stop suddenly, a brake device that can be operated by the driver can be provided.

  The electric carriage 1 moves backward when the driver turns on the power switch 13, turns on the clutch device 10D (switch 10E is turned on), and the driver holds the left lever 12B with the hand holding the left handle 7. By gripping, the movable piece of the changeover switch device 12 is turned on at the contact point b, and each DC motor 10A rotates in the reverse direction, so that the electric transport vehicle 1 moves backward at a predetermined speed set by the knob 40. . If the lever 12B of the change-over switch device 12 is removed, the electric transport vehicle 1 has an internal resistance of each DC motor device 10 for driving, that is, an electric working between the rotor and the stator of the DC motor 10A. It stops by resistance and mechanical resistance by gear apparatus 10C etc.

  At the front end of the chassis 2, a bumper 35 having a left and right length across the width of the electric transport vehicle 1 is provided. The bumper 35 is configured by a bumper member 35A that extends horizontally to the front end portion of the chassis frame 2A and a cushion material 35B that covers the bumper member 35A. The cushion material 35B is resinous like urethane rubber. A substantially flat guard 36 that opens and closes the front side of the loading platform 3 is provided at the front end portion of the loading platform 3 so that the luggage does not fall forward from the loading platform 3. The guard 36 has a substantially flat plate shape, and includes a guard frame 36A that goes around the periphery and a guard plate 36B that is fixed to the upper surface of the guard frame 36A by welding or screwing. The guard 36 is rotated between a state where it rises upward as shown by a solid line in FIGS. 1 to 4 to prevent the load on the loading platform 3 from dropping and a slope state that is inclined downward as indicated by a two-dot chain line in FIG. The chassis frame 2A is movably supported by the shaft 37 of the shaft support portion 37A. For this reason, in the state of loading and transporting the load on the loading platform 3, it is held in a state of rising upward as shown by the solid line in FIGS. 1 to 4, and when loading and unloading the load, as shown by the two-dot chain line in FIG. It can be pivoted so that it can be tilted forward.

  The guard frame 36A is configured to be pivotable in the front-rear direction by the shaft support portion 37A with respect to the chassis frame 2A. In the illustrated configuration, the base portion of the bumper member 35A is supported by the shaft 37 so as to be pivotable in the front-rear direction with respect to the left and right support portions 90 provided on the peripheral frame member 2A3 that is the front member of the chassis frame 2A. The base of the guard frame 36A is integrated with the bumper member 35A by welding. Therefore, the guard 36 is strengthened by reinforcing the lower part of the guard frame 36A by the bumper member 35A, and the attachment of the guard 36 and the bumper 35 to the chassis frame is simplified. As a result, the guard 36 can be rotated forward about the shaft 37 of the shaft support portion 37 </ b> A, and the bumper 35 also rotates as the guard 36 rotates.

  In a state where a load is loaded on the loading platform 3, the guard 36 is in a state where the front end portion of the loading platform 3 is guarded as shown in FIG. When loading or unloading luggage onto the loading platform 3, the guard 36 is rotated forward from this state, and the front end of the guard 36 is tilted toward the ground or floor surface in front of the loading platform 3. As a result, a slope in a state of being lowered from the loading platform 3 is formed by the guard 36, and the front end portion of the loading platform 3 is released. For this reason, it becomes easy to load and unload luggage on the loading platform 3. In this state, the bumper member 35 is in a state of floating from the ground or floor surface in front of the loading platform 3.

  In this manner, by tilting the guard 36 to the forwardly inclined state, the wheelchair wheel can be rolled up and down on the guard plate 36B along the slope. Also, loading and unloading of heavy objects can be performed by sliding on the guard plate 36B along the slope, which makes it easy to load and unload luggage. In a state where the guard plate 36B rises upward in a substantially vertical state, the guard plate 36B is useful for preventing the drop-off of small items on the loading platform 3.

  A holding device for holding the guard 36 in an upright state is provided on the shaft support portion 37 </ b> A in order to prevent the load from slipping off when the load is loaded on the loading platform 3. This holding device can be constituted by, for example, a coupling member such as a chain or a belt that detachably couples the guard 36 and the chassis frame 2A. The holding device may have other configurations.

  Further, the bumper member 35 is not integrated with the guard 36 but is fixed to the chassis frame 2A apart from the guard 36, and the guard 36 is supported by the chassis frame 2A by the shaft support portion 37A so as to be rotatable. It may be a thing.

  16 and 17 show a second embodiment of the electric transport vehicle 1 according to the present invention. FIG. 16 is a front perspective view of the electric transport vehicle 1 according to the present invention in a state where a load is loaded, and FIG. It is a side view of the electric conveyance vehicle 1 which concerns on this invention of the state which loaded. The electric carrier 1 of the second embodiment has side walls on both the left and right sides of the cargo bed 3 so that the load M can be easily loaded and unloaded from the left and right sides of the cargo bed 3 as compared with the electric carriage 1 of the first embodiment. Although 1A is made low and the exterior differs from the electric conveyance vehicle 1 of Example 1, it is a low center-of-gravity configuration similarly to the electric conveyance vehicle 1 of Example 1, and about the structure of each part about the electric conveyance of Example 1 Since it is the same as that of the transport vehicle 1, the description thereof is omitted, but the same functional components as those of the first embodiment shown in the figure are denoted by the same reference numerals as those of the first embodiment.

  As in the first embodiment, a substantially flat guard 36 that opens and closes the front side of the cargo bed 3 is provided at the front end of the cargo bed 3 so that the cargo does not fall forward from the cargo bed 3. The guard 36 has a substantially flat plate shape, and is composed of a guard frame 36A that goes around the periphery and a guard plate 36B disposed on the upper surface of the guard frame 36A. The guard 36 can be tilted forward when loading and unloading luggage. A shaft is rotatably supported by the chassis frame 2A. The guard 36 according to the second embodiment is held in an inclined state after being slightly tilted in the direction of the loading platform 3 in the state of loading and transporting the cargo on the loading platform 3.

  The side wall 1A is formed with side wall portions 2C on the left and right sides of the chassis frame 2A in the same manner as the electric transport vehicle 1 of the first embodiment, and the front and rear wheels 5 and 6 are attached to the outer wall 2C1 covering the outside of the side wall portion 2C. The front and rear fender portions 41 and 42 are integrally formed. Since the side walls 1A on both the left and right sides of the loading platform 3 are lowered, the right and left sides of the control tower 9 and the cab 4 are arranged to prevent the tall luggage M from falling over and falling from the left and right sides of the loading platform 3. A part 2C11 of the outer wall 2C1 formed so as to cover both the left and right sides is provided with left and right side guards 45 extending rearward above the side walls 1A in parallel with the left and right side walls 1A. It is provided so as to be rotatable upward about the portion 45A. Loading and unloading of luggage from the left and right sides of the loading platform 3 can be performed in a state where the left and right guards 45 are rotated approximately 90 degrees upward.

  Further, in order to prevent the driver H standing on the cab 4 from falling to the rear of the cab 4, it passes from one side of the cover 9 </ b> C of the control tower 9 to one side of the cab 4 to the rear. A driver's guard 46 is provided that extends laterally toward the other side of the cab 4 so as to cross the rear portion of the cab 4. The driver guard 46 is covered with a cushion cover and is substantially horizontal at a position corresponding to the lower part of the back of the driver H who stands on the driver's cab 4. By entering between the handle 7 and the driver's guard 46 from one side of the left and right, it is possible to get into the cab 4. In the illustrated form, the control tower 9 is configured to be slightly inclined forward in consideration of ease of operation.

  FIG. 18 shows a third embodiment of the electric transport vehicle 1 according to the present invention, and FIG. 18 is a front perspective view of a state in which the wheelchair K on which the person H1 is on the electric transport vehicle 1 according to the present invention is loaded on the loading platform 3. It is. The electric transport vehicle 1 of the third embodiment is different from the electric transport vehicle 1 of the first embodiment in appearance including the shapes of the left and right side walls 1A of the loading platform 3, but the electric transport vehicle 1 of the first embodiment is different from the electric transport vehicle 1 of the first embodiment. Similarly, it has a low center of gravity, and since the configuration of each part is the same as that of the electric transport vehicle 1 of the first embodiment, the description thereof is omitted, but the same functional components as those of the first embodiment shown in FIG. Are denoted by the same reference numerals as those in the first embodiment. The wheelchair K is fixed at a predetermined position of the loading platform 3 by a wheelchair fixing tool provided on the flooring 3 </ b> B of the loading platform 3. In this case, the structure which attaches a commercially available wheelchair fixing tool to the flooring 3B of the loading platform 3 is convenient.

  As shown in FIG. 18, the height of the guard 36 is substantially the height of the seat of the wheelchair K or slightly higher than that, so the front of the person H1 riding on the wheelchair K is covered with the guard plate 36B. Thus, it is possible to give a sense of security to the person H1 riding in the wheelchair K. Since the height of the person H1 riding in the wheelchair K is sufficiently low to be able to look forward, there is an effect that does not disturb the view of the person H1 riding in the wheelchair K.

  In any of the first embodiment and the second embodiment, as in the third embodiment, the height of the floor of the loading platform 3 is set so that the wheelchair K on which the person H1 is on the electric transport vehicle 1 can be loaded on the loading platform 3. Is set.

  Within the scope of the technical idea of the present invention, the present invention is not limited to the above-described embodiment, and can be applied to the electric conveyance vehicles of various embodiments.

It is a back perspective view showing the basic form containing the chassis structure of the electric conveyance vehicle concerning the present invention. Example 1 It is a front perspective view which shows the basic form containing the chassis structure of the electrically-driven conveyance vehicle which concerns on this invention. Example 1 It is a left view which shows the basic form containing the chassis structure of the electric conveyance vehicle which concerns on this invention. Example 1 It is a front perspective view of the electric conveyance vehicle concerning the present invention. Example 1 It is a back perspective view of the electric conveyance vehicle concerning the present invention. Example 1 It is a perspective view which shows arrangement | positioning of the electric system control part of the control tower provided with the handle | steering-wheel of the electric conveyance vehicle which concerns on this invention. Example 1 It is an upper perspective view which shows the relationship between the chassis frame and exterior member of the electric conveyance vehicle which concerns on this invention. Example 1 It is a perspective view which shows the structure of the handle shaft lower end part of the electric conveyance vehicle which concerns on this invention. Example 1 It is a perspective view which shows the structure of the front-wheel rotation mechanism part of the electric conveyance vehicle which concerns on this invention. Example 1 It is a perspective view which shows the rotation mechanism part of the front wheel of the electric conveyance vehicle which concerns on this invention. Example 1 It is a figure which shows the structure of the front-wheel support part with respect to the chassis frame of the electrically-driven conveyance vehicle which concerns on this invention. Example 1 It is a bottom view which shows the relationship of the supporting member of the front wheel with respect to the chassis frame of the electrically-driven conveyance vehicle which concerns on this invention. Example 1 It is a perspective view of the rear-wheel drive part of the electric conveyance vehicle which concerns on this invention. Example 1 It is a partial enlarged view of the rear-wheel drive part of the electric conveyance vehicle which concerns on this invention. Example 1 It is an electric circuit diagram of the electric conveyance vehicle concerning the present invention. Example 1 It is a front perspective view of the electric conveyance vehicle concerning the present invention in the state where the load was loaded. (Example 2) It is a side view of the electric conveyance vehicle concerning the present invention in the state where a load was loaded. (Example 2) It is a front perspective view of the state where the wheelchair which the person got on the electric conveyance vehicle concerning the present invention was loaded on the loading platform. Example 3

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 .... Electric conveyance vehicle 1A ... Side wall 2 .... Chassis 2A ... Chassis frame 2C ... Side wall part of chassis frame 2C1, ... Outer wall 3 .... Loading platform 3A ... Loading platform Floor part 3B ... Floor material of the loading platform 3C1 ... Inner side wall of the loading platform 3C2 ... Inner side wall of the loading platform 4 .... Driver's cab 4A ... Floor of the cab 4B ... Floor material of the cab 4C1 .. Inner side wall of cab 4C2 .. Inner side wall of cab 5 ... Front wheel 5A ... Front wheel axle 6 ... Rear wheel 6A ... Rear wheel axle 7 ... Handle 8 .... Electric system control unit 9 .... Control tower 10 ... DC motor device for driving 10A ... DC motor 10B ... Output shaft of driving DC motor device 10C ... Gear device 10D ... Clutch Device 10D1 ··· Clutch lever 10E · · Switch of clutch device 11 · · · Power storage DESCRIPTION OF SYMBOLS 12 ... Forward / backward switch device 13 ... Power switch 14 ... Head lamp 15 ... Tail lamp 16 ... Switch 17 ... Electrical box 18 ... Rotating body 19 ... Front / rear operation rod DESCRIPTION OF SYMBOLS 20 ... Support member 21 ... Vertical axis part 22 ... Axle member 23 ... Left-right operation rod 27 ... Rotating body 32 ... Cushion material 33 ... Crevice 35 ... Bumper 36. ··· Guard 36A · · Guard frame 36B · · Guard plate 37 · · · shaft 37A · · · shaft support portion 38 · · · speed display portion 39 · · · speed setting device 40 · · · knob of the speed setting device 41, 42 ... Fender part 43 ... Button for horn 44 ... Display part of storage battery 45 ... Left / right side guard 46 ... Guard for driver

Claims (4)

  A front wheel and a rear wheel are arranged in front and rear positions on both left and right sides of a chassis with a loading platform disposed on the front side and a cab on the rear side, and the front wheels are pivoted left and right on the front side of the cab on the rear side of the loading platform. An operating handle is disposed, and the left and right rear wheels are supported by the output shafts of the respective DC motor devices attached to the left and right sides of the chassis, and are rotated by the DC motor devices. Is provided with a guard that prevents the cargo of the cargo bed from falling, and the guard has a substantially flat upper surface and rises upward to prevent the cargo of the cargo bed from falling, and the guard is inclined low toward the front of the cargo bed. An electric conveyance vehicle characterized in that it is axially supported by a chassis frame so as to be rotatable in a slope state.   A front wheel and a rear wheel are arranged in front and rear positions on both left and right sides of a chassis with a loading platform disposed on the front side and a cab on the rear side, and the front wheels are pivoted left and right on the front side of the cab on the rear side of the loading platform. An operating handle is disposed, and the left and right rear wheels are supported by output shafts of respective DC motor devices attached to the left and right side portions of the chassis, and are driven to rotate by the DC motor devices. The front wheels and the rear wheels Is configured with wheels having substantially the same diameter, and the level of the chassis that forms the floor of the cargo bed is arranged at a position that is approximately the same height as the axle level of the front wheels and the rear wheels, and is arranged at the front end of the cargo bed. Is provided with a guard that prevents the cargo of the cargo bed from falling, and the guard has a substantially flat upper surface and rises upward to prevent the cargo of the cargo bed from falling, and the guard is inclined low toward the front of the cargo bed. In the slope state Rotatably the electric transporting vehicle, characterized in that it is axially supported on the chassis frame.   The guard is composed of a guard frame that goes around the periphery and a guard plate disposed on the upper surface of the guard frame, and a base portion of the guard frame is rotatably supported on the chassis frame by a shaft support portion. The electric conveyance vehicle of Claim 1 or Claim 2.   The said guard is the structure integrated with the bumper provided in the front-end part of the said chassis frame, and is the structure supported by the said chassis frame so that rotation was possible by the axis | shaft support part. Electric transport vehicle.

Images