Walkie electric truck

Abstract

The present invention provides a walk-around electric pallet truck. The walk-around electric pallet truck can prevent the battery from being damaged due to collision with goods and from being continuously used for a long time. A battery (7) is housed in a battery case (3) in a box shape, the battery case (3) is detachably attached to a vehicle body main part (2), and the battery case (3) holds the battery (7) in a manner that spaces (S2, S3) are provided inside an upper portion and a front portion of the battery case (3) so as to be separated from an upper surface and a front surface of the battery (7), respectively.

Description

Technical Field

[0001] This invention relates to a pedestrian-operated electric transport vehicle that moves a trolley by means of an operator. Background Technology

[0002] In factories, warehouses, logistics centers, and other similar locations, workers typically move cage-like trolleys loaded with parts or products to the desired location by pushing them. In recent years, with the miniaturization and lower cost of high-capacity batteries, devices that can assist manual operations with electric drive units have become rapidly popular, and electric transport vehicles capable of towing or pushing cage-like trolleys have emerged in fields such as logistics (e.g., Patent Document 1).

[0003] Patent Document 1 shows an electric pallet truck, which is a walk-through electric pallet truck. This walk-through electric pallet truck includes: a main body with a drive unit capable of driving wheels using electricity; an upright section that rises from the main body and has a handle at its upper end for workers to grip; and a battery that provides power to the drive unit. When the worker engages the cage-like trolley with the engaging part on the main body, they operate the throttle on the handle. This allows the worker to move the cage-like trolley simply by moving the walk-through electric pallet truck itself, thereby significantly reducing the manual labor required for material handling.

[0004] While differing in field and application, walking-type management machines exist for use in agricultural operations, having a similar structure to walking electric transport vehicles (e.g., Patent Document 2). This walking-type management mechanism allows for easy loading and unloading of the battery pack relative to the main body of the vehicle. By removing a battery pack with less remaining capacity and replacing it with one with more remaining capacity, the walking-type management machine can be used continuously for extended periods. Both walking electric transport vehicles and walking-type management machines, which are operated by workers while walking, share the following common structure: to avoid obstructing movement, an upright section is erected diagonally rearward from the main body of the vehicle, and the battery is supported at the front of the upright section.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-23288 (page 4) Figure 2 )

[0006] Patent Document 2: Japanese Patent Application Publication No. 2005-348617 (page 4) Figure 5 )

[0007] Although not specifically described in Patent Document 1, most walk-behind electric transport vehicles employ a structure where the battery is fixed to the main body of the vehicle. When the battery capacity is low, each walk-behind electric transport vehicle needs to be pre-positioned at the charging station, resulting in short continuous operating time. Therefore, a technology like that in Patent Document 2, which allows for easy battery assembly and disassembly, is preferred. However, since walk-behind electric transport vehicles are used in environments where goods may tip over due to the movement of heavy objects, there is a possibility that the goods may collide with the battery supported at the front of the upright section, causing damage. Summary of the Invention

[0008] This invention was made in view of the problem that the purpose is to provide a walk-through electric pallet truck that can prevent battery damage caused by collisions with goods and can be used continuously for a long time.

[0009] To address the aforementioned issues, the present invention provides a walk-through electric transport vehicle having a handle for operators to hold and a drive unit capable of electrically driving the wheels. This walk-through electric transport vehicle can be connected to a cargo-carrying trolley for electrically traction or retraction. The walk-through electric transport vehicle comprises: a main body having the drive unit and the wheels; an upright portion extending upwards from the main body, having the handle at its upper end; and a battery supplying power to the drive unit. The battery is characterized in that it is housed within a box-shaped battery casing, which is detachably mounted to the main body. The battery casing has space to hold the battery by separating its upper and front portions from the upper and front surfaces of the battery, respectively.

[0010] Based on this feature, the battery casing housing the battery can be easily installed and removed from the main body of the vehicle. This allows for easy replacement of the battery due to depletion or deterioration over time. For example, a battery casing housing a small amount of remaining battery capacity can be removed and replaced with one housing a larger amount, enabling continuous use of the walk-behind electric pallet truck for extended periods. Furthermore, in the event of a cargo collapse, although there is a possibility of serious accidents such as fires caused by damage from cargo collisions, the battery is held in place by the space provided by the separate upper and front surfaces inside the battery casing. This improves the impact resistance against cargo collisions and effectively prevents breakage.

[0011] The vehicle body is characterized in that it has: a housing that houses the drive unit; and a surrounding portion that surrounds the housing in a manner separate from the housing, wherein the battery casing is supported by the surrounding portion.

[0012] Based on this feature, in the event of a collision with cargo, the load applied to the battery casing is mitigated by the elastic deformation of the surrounding portion, which can further prevent the battery casing itself from breaking.

[0013] The feature is that a mounting plate is installed above the surrounding portion, the mounting plate having a shape that follows the lower part of the battery casing, and the battery casing is supported in a state of interlocking with the mounting plate.

[0014] Based on this feature, the relative movement of the battery casing and the mounting plate in the horizontal direction is restricted, which can prevent the battery casing from falling off and can keep the battery casing always installed in a fixed position on the main body of the vehicle.

[0015] The feature is that a guide ridge is formed on the back side of the battery casing in a left-right separation manner, and the guide ridge extends across the raised portion of the main body of the vehicle body from left to right.

[0016] Based on this feature, it is possible to prevent the battery casing from swinging in the left and right directions relative to the main body of the vehicle, and during installation, the guide ridge is guided to the upright part, thereby guiding the battery casing to a fixed position on the main body of the vehicle.

[0017] The battery casing is characterized in that it has space to hold the battery by separating its internal two sides from the two sides of the battery.

[0018] Based on this characteristic, regardless of the direction of the external force applied to the battery casing, the impact on the battery can be reduced, and the impact resistance can be improved.

[0019] The battery casing is characterized in that it is box-shaped, consisting of a front plate, a rear plate, and an annular cylindrical body sandwiched between the front plate and the rear plate.

[0020] Based on this characteristic, the cylindrical body can achieve high strength to withstand loads in the front-to-back direction.

[0021] The feature is that the upper part of the front surface of the front panel of the battery casing has a curved groove, which is convex downward from the center in the left-right direction.

[0022] Based on this feature, in the event of a collision with cargo, the load applied to the battery casing is mitigated by the elastic deformation of the front plate starting from the groove, which can further prevent the battery casing itself from breaking.

[0023] The characteristic feature is that the cylindrical body is wavy.

[0024] Based on this feature, the contact area between the front panel and the cylindrical body can be increased, making it easier to transfer the external force applied to the front panel to the cylindrical body and improving the impact resistance of the battery casing. Attached Figure Description

[0025] Figure 1 This is a perspective view of a pedestrian electric transport vehicle according to an embodiment of the present invention.

[0026] Figure 2 This is a side view of a pedestrian-operated electric transport vehicle.

[0027] Figure 3 This is a 3D view of a walk-through electric transport vehicle, with the battery casing represented by double-dotted lines.

[0028] Figure 4 This is a side view of a pedestrian-operated electric transport vehicle, omitting the battery casing and the wheels near the front.

[0029] Figure 5 This is an exploded 3D view of the battery casing.

[0030] Figure 6 This is a front view of the battery casing, omitting the front panel shown in the illustration.

[0031] Figure 7 This is a front view showing the relationship between the battery casing and the mounting plate.

[0032] Figure 8 It is a perspective view showing the relationship between the battery casing and the mounting plate.

[0033] Figure 9 This is a perspective view showing the back side of the battery casing.

[0034] Figure 10 This is a side view showing how the thumb screw of the upright part engages with the hook of the battery casing.

[0035] Label Explanation

[0036] 1: Walk-through electric transport vehicle; 2: Main body; 3: Battery casing; 4: Erecting part; 5: Loading plate; 5a: Protrusion; 7: Battery; 10: Cage trolley; 14: Connecting device; 21: Housing; 22: Surrounding part; 32: Drive wheel; 33: Caster; 34: Front plate; 35: Rear plate; 36: Cylindrical body; 37: Base component; 38b: Hook; 38d: Lower surface part; 38: Strength component; 39: Plate; 42: Protective component; 43: Groove; 44: Feet; 45: Guide protrusion; S1~S3: Space. Detailed Implementation

[0037] Hereinafter, a method for implementing the pedestrian electric transport vehicle of the present invention will be described based on an embodiment.

[0038]

Example

[0039] Reference Figures 1 to 10The pedestrian-operated electric pallet truck of the embodiment will be described below. Figure 2 The right side of the paper is designated as the front side of the pedestrian electric transport vehicle. Figure 2 The left side of the paper is set as the rear side of the pedestrian electric transport vehicle for explanation.

[0040] like Figure 1 As shown, a pedestrian-operated electric pallet truck (hereinafter referred to as "pallet truck") 1 travels on the ground in factories, warehouses, logistics centers, etc., for transporting cage-type trolleys 10 (trolleys). The cage-type trolley 10 of this embodiment has: a rectangular base plate 11 in top view, which can be used to load items; a grid-shaped panel 12, which is erected along three sides of the base plate 11; and casters 13, which are respectively provided at the front and rear ends of the lower end. The cage-type trolley 10 can take out and put in loaded items from the side where the panel 12 is not erected.

[0041] The transport vehicle 1 is used in conjunction with the cage trolley 10 using a connecting device 14. The connecting device 14 includes: a connecting rod 15 extending towards the front surface of the main body 2 of the transport vehicle 1; a connecting shaft 15a erected upwards at the front end of the connecting rod 15; and arms 16, 16, one end of which is rotatably supported on the connecting shaft 15a, and hooks at the other ends of the arms 16, 16 engaging with the cage trolley 10 in the direction of travel, thereby connecting the transport vehicle 1 to the cage trolley 10. Furthermore, in Figure 2 The diagrams in the following figures omit the connection device 14.

[0042] like Figure 2 As shown, the transport vehicle 1 mainly includes: a main body 2 that can travel on the ground; an erection 4 that extends diagonally rearward from the main body 2; and a battery casing 3 that is disposed above the main body 2 and in front of the erection 4.

[0043] Regarding the main body 2, two drive wheels 32 are provided on the left and right sides at the front of the main body 2, and two casters 33 are provided on the left and right sides at the rear of the main body 2.

[0044] like Figure 3 and Figure 4 As shown, the main body 2 of the vehicle body includes: a metal box-shaped shell 21; a surrounding portion 22, which is formed by bending a metal plate to surround the shell 21 in the longitudinal direction; and a flat plate portion 23, which extends rearward from the shell 21. The flat plate portion 23 is integrally formed with the surrounding portion 22 by means of a metal plate. In addition, although not shown here, the shell 21 houses a drive motor, a shaft, and a control board, which serve as a drive unit for driving the drive wheels 32.

[0045] The lower end of the upright section 4 is welded and fixed to the flat plate section 23, and a handle section 41 is provided at the upper end of the upright section 4. While holding the handle section 41, the operator operates the drive wheel 32 by operating the throttle valve (not described in detail here) located on the handle section 41, thus moving the cage trolley 10 with minimal force in conjunction with the movement of the transport vehicle 1. Additionally, a finger screw 6 (described later) is screwed into the upper part of the upright section 4.

[0046] like Figure 4 As shown, the surrounding part 22 is fused and fixed to the upright part 4, and the surrounding part 22 is provided to surround the housing 21 in a manner that is separate from the upper part, lower part and front part of the housing 21 respectively. Furthermore, the upper surface part 22a of the surrounding part 22 is perpendicular to the upright part 4, and the mounting plate 5, which will be described later, is fixed on the upper surface part 22a.

[0047] like Figure 5 As shown, the battery 7, which supplies power to the drive motor, is housed within a box-shaped battery casing 3. The battery casing 3 is box-shaped, consisting of a front panel 34, a rear panel 35, and an annular cylindrical body 36 sandwiched between the front panel 34 and the rear panel 35. The front panel 34, the rear panel 35, and the cylindrical body 36 are formed of an elastic synthetic resin.

[0048] A through hole 35b is formed on the back side 35a of the rear panel 35 of the battery casing 3. A connector 40b of a power cable extending from the main body 2 of the vehicle body on the outside of the battery casing 3 is inserted through the through hole 35b and connected to the connector (not shown) of the battery 7 inside the battery casing 3 (see reference). Figure 9 ).

[0049] like Figure 5 and Figure 6 As shown, the battery casing 3 has a left-right width at its central portion in the vertical direction, with the left-right widths at the top and bottom being smaller than those at the central portion. The cylindrical body 36 has inwardly recessed portions 36a formed at the top and bottom of its left and right sides, respectively, and the cylindrical body 36 is generally wavy. The upper and lower surfaces of the recesses 36a are formed parallel to each other, and a U-shaped base component 37 is fixed to the upper and lower surfaces of the recesses 36a.

[0050] The base component 37 is fixed to the front and rear ends of all the recesses 36a respectively, and the base component 37 has a through hole. The front plate 34 and the rear plate 35 have holes at positions corresponding to these holes, and the front plate 34, the rear plate 35 and the cylindrical body 36 are fixed together by tightening screws 50 from the front and rear direction.

[0051] The upper and lower inner sides of the cylindrical body 36 are respectively fixed with the upper and lower outer sides of the U-shaped reinforcement members 38. The outer surface of the back part 38a of the reinforcement member 38 abuts against the inner surface of the rear plate 35. Multiple rubber pads (not shown) are installed on the inner surface of the back part 38a to prevent the battery 7 located inside the cylindrical body 36 from shaking, so that the vibration of the transport vehicle 1 during travel is less likely to act on the battery 7 which is tilted against the reinforcement member 38.

[0052] In addition, such as Figure 5 and Figure 6 As shown, a display 40 capable of being visually confirmed from the outside is mounted on the upper surface 36b of the cylindrical body 36. An electronic device 46, which displays status information such as the remaining battery level and charging time of the battery 7, is disposed inside the cylindrical body 36. More specifically, the electronic device 46 is disposed in the space between the plate 39, which is fixed to the upper side of the inner side of the cylindrical body 36, and the upper surface 36b of the cylindrical body 36.

[0053] As described above, the battery casing 3, which houses the battery 7, is detachably installed on the main body 2 of the vehicle body. Therefore, it is easy to replace the battery 7 due to battery depletion or deterioration over the years. For example, the battery casing 3, which houses a small amount of battery 7, can be removed and replaced with a battery casing 3 that houses a large amount of battery 7, thereby enabling the transport vehicle 1 to be used continuously for a long time.

[0054] Furthermore, the inner sides 36c of the upper and lower recesses 36a of the battery casing 3 are aligned vertically, and the battery 7 is positioned between the recesses 36a of the cylindrical body 36, thus restricting the lateral movement of the battery 7. In other words, the parts of the cylindrical body 36 other than the recesses 36a are separated from the left and right sides of the battery 7, forming a space S1 between them. Therefore, in the event of a collision between the cargo and the battery casing 3 caused by the collapse of cargo, the external force does not directly act on the battery 7, resulting in excellent impact resistance.

[0055] Furthermore, protective members 42 are respectively installed between the left and right recesses 36a on the front inner side of the cylindrical body 36, restricting the forward and backward movement of the battery 7 between the reinforcing member 38 and the protective members 42. The front plate 34 constituting the front surface of the battery casing 3 is bulging forward, and the front surface of the battery 7 is held by the protective member 42 and separated from the front plate 34, forming a space S3 between them (see reference). Figure 2 Therefore, in the event of a collision with cargo, the external force does not directly act on the battery 7, resulting in excellent impact resistance.

[0056] Additionally, the plate 39 above the interior of the cylindrical body 36, the lower surface 36d of the cylindrical body 36, and the lower surface 38d of the strength member 38 (see reference) Figure 5Between the plate 39 and the upper surface 36b of the cylindrical body 36, the vertical movement of the battery 7 is restricted. In other words, the upper part of the battery 7 is separated from the upper surface 36b of the cylindrical body 36, and a space S2 exists between the plate 39 and the upper surface 36b of the cylindrical body 36 (see reference). Figure 2 and Figure 6 Therefore, in the event of a collision with cargo, the external force does not directly act on the battery 7, resulting in excellent impact resistance.

[0057] Furthermore, a groove 43 is formed on the upper part of the outer surface 34a of the front panel 34 of the battery casing 3. This groove 43 is curved downward from the center in the left-right direction, allowing the upper and lower parts of the front panel 34 to easily deform elastically through the groove 43. Therefore, the upper front part of the battery casing 3, which is highly likely to collide with cargo in the event of a cargo collapse, can elastically deform, thereby mitigating the impact and effectively preventing damage to the battery casing 3 and the internal battery 7.

[0058] like Figure 7 As shown in (b), the battery casing 3 is held on a mounting plate 5 of the vehicle body 2. The mounting plate 5 has a concave shape when viewed from above, with upwardly protruding protrusions 5a at the left and right ends. The lower end of the battery casing 3 has a narrow convex shape. The mounting plate 5 and the lower end of the battery casing 3 engage in a concave-convex fit, restricting the movement of the battery casing 3 in the left and right directions. Furthermore, the protrusions 5a at the left and right ends of the mounting plate 5 have tapered portions, and the lower surface portion 36d of the lower end of the battery casing 3, i.e., the cylindrical body 36, has corresponding inclined surfaces 36e on the left and right sides. Therefore, when a relatively heavy battery casing 3 is placed on the mounting plate 5, it can be guided to a relatively accurate position, resulting in excellent workability.

[0059] like Figure 8 As shown in (a), resin feet 44 are provided at the four corners of the lower end of the battery casing 3, i.e., the lower surface portion 36d of the cylindrical body 36. When the battery casing 3 is placed directly on the ground, these feet 44 contact the ground. Furthermore, holes 5b are provided on the mounting plate 5 for the feet 44 to engage from above. By engaging the feet 44 with the holes 5b, the movement of the battery casing 3 forward, backward, left, right, and upward is restricted.

[0060] In addition, such as Figure 9 As shown, on the back side 35a of the rear plate 35 of the battery casing 3, guide ridges 45 extending in the vertical direction are formed in a left-right separated manner. These guide ridges 45 are respectively arranged opposite to the left and right sides of the upright part 4, restricting the movement of the battery casing 3 relative to the upright part 4 in the left-right direction.

[0061] And, as Figure 5 and Figure 9As shown, a downward-facing hook 38b is provided on the back side of the strength member 38 in a left-right separation manner. The hook 38b protrudes from the slot 35c formed on the back plate 35 of the battery casing 3 to the outside of the battery casing 3.

[0062] like Figure 10 As shown, finger screws 6 are screwed onto the left and right sides of the upper part of the upright portion 4. When the battery casing 3 is placed on the mounting plate 5, hooks 38b engage with the screw body (not shown) of the finger screw 6 from above, thereby restricting the forward movement of the battery casing 3. Furthermore, the finger screw 6 has a stepped portion with a diameter larger than the screw body on the head side. By tightening the finger screw 6 with the hooks 38b engaged, the plate-shaped hooks 38b are clamped between the stepped portion of the finger screw 6 and the left and right sides of the upright portion 4, inhibiting the upward movement of the battery casing 3.

[0063] Furthermore, since the battery 7 and the vehicle body 2 are connected by a power cable, even if the battery casing 3 moves relative to the vehicle body 2 due to a collision with cargo, it is not easy for a broken wire to occur between the battery 7 and the vehicle body 2, which would cause a malfunction.

[0064] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the specific structure is not limited to these embodiments, and any changes and additions that do not depart from the spirit of the present invention are also included in the present invention.

[0065] For example, the trolley transported by the transport vehicle 1 is not limited to a cage trolley; for example, it can be any trolley with wheels, such as a flatbed trolley, a hand-pushed trolley, or a container.

[0066] Furthermore, in the above embodiments, the battery casing 3 mainly has a front panel 34, a rear panel 35, and a cylindrical body 36. The internal battery 7 can be accessed by removing the screws 50, which provides excellent maintainability. However, it is not limited to this and the battery casing can also be formed by an integral synthetic resin or metal box.

[0067] Furthermore, in the above embodiment, the following structure was described: the mounting plate 5 has a concave shape when viewed from above, with protrusions 5a protruding upwards at the left and right ends, and the lower end of the battery casing 3 has a narrow convex shape. The mounting plate 5 and the lower end of the battery casing 3 are engaged with each other in a concave-convex manner. However, it is not limited to this. The shape of the mounting plate side can also be set to a convex shape when viewed from above, and the lower end of the battery casing 3 can be set to a concave shape.

[0068] Furthermore, the cylindrical body 36 can also be formed by fixing multiple plates together to form a ring.

[0069] Furthermore, in the above embodiment, the structure is described as follows: the plate 39 above the interior of the cylindrical body 36, the lower surface portion 36d of the cylindrical body 36, and the lower surface portion 38d of the strength member 38 (see reference). Figure 5 Between the two, the vertical movement of the battery 7 is restricted, but not limited to this. For example, it can also be a structure in which a cap-shaped component protruding downwards is fixed above the cylindrical body 36 to replace the plate body 39, and the vertical movement is restricted by the cap-shaped component.

[0070] Furthermore, the space S3 in front of the battery 7, the space S2 above it, and the spaces S1 to the left and right inside the battery casing 3 are not limited to the structures described above. Any structure can be used to restrict the movement of the battery 7 forward, upward, and left and right by forming spaces S3, S2, and S1 on the inside of the battery casing 3. For example, protective components protruding towards the left and right inner surfaces can be installed on the left and right inner surfaces of the battery casing 3, thereby separating the left and right ends of the battery 7 from the left and right inner surfaces of the cylindrical body and forming a space S1 between them.

[0071] Furthermore, the structure for suppressing the upward movement of the battery casing 3 is not limited to the structure using a thumb screw 6 and a hook 38b as in the above embodiment. For example, it can also be a structure in which a recess is formed in the upper part of the battery casing 3 and a claw member that engages with the recess is provided in the upright part 4.

[0072] Furthermore, as a structure to suppress the upward movement of the battery casing 3, a so-called latch can be used, which has an upward-facing claw on the upright part 4 and a hook on the upper part of the battery casing 3 that engages with the claw, and the claw and the hook constitute the latch.

[0073] Furthermore, as a structure to suppress the upward movement of the battery casing 3, the following structure may be adopted: a recess is provided in the upright part 4, and a hook is provided on the upper part of the battery casing 3 to engage with the recess, and the hook is forcefully applied upward by a force-applying mechanism.

[0074] Furthermore, the structure for restricting the movement of the battery casing 3 relative to the upright portion 4 in the left-right direction is not limited to the structure described in the above embodiment, which forms upwardly protruding protrusions 5a at the left and right ends of the mounting plate 5 and engages the mounting plate 5 with the lower end of the battery casing 3. For example, by adopting a structure that restricts movement in the front-back direction in addition to the left-right direction, vertically extending grooves are formed on the left and right sides of the battery casing 3, and upwardly erecting rods are formed at the left and right ends of the mounting plate 5, so that the grooves engage with the rods from above.

[0075] Furthermore, by adopting the following structure, in addition to the left-right direction, movement in the front-back direction can also be restricted: a groove extending vertically is formed on the front side of the battery casing 3, and a protective part that rises upward is formed on the front side of the mounting plate 5, so that the groove engages with the protective part from above. Alternatively, the following structure can be adopted: in addition to forming a groove on the front side of the battery casing 3, a groove is also formed on the back side, and protective parts are formed on the front and back sides of the mounting plate 5, thereby clamping the battery casing 3 from the front and back. A ball plug can also be provided in the protective part, and a recess for the ball plug to engage can be provided on the groove side, thereby additionally suppressing the vertical movement of the battery casing 3.

[0076] Furthermore, by adopting the following structure, in addition to the left and right directions, movement in the front and back directions can also be restricted: a slit-shaped hole is formed at the bottom of the battery casing 3, and an upward-standing plate is formed on the mounting plate 5, so that the hole is inserted into the plate from above.

[0077] Furthermore, by employing a structure that allows the lower end of the battery casing 3 to magnetically adhere to the upper surface of the mounting plate 5, the function of suppressing vertical movement of the battery casing 3 can be added.

Claims

1. A walkaround electric truck having a handle portion to be held by an operator and a drive portion capable of driving wheels by electric power, the walkaround electric truck being capable of electrically towing or pushing a dolly on which goods are placed in connection with the dolly, the walkaround electric truck having: a truck body main portion having the drive portion and the wheels; an erected portion erected upward from the truck body main portion, the handle portion being provided at an upper end of the erected portion; and a storage battery that supplies electric power to the drive portion, characterized in that the storage battery is housed in a battery case that is box-shaped, the battery case being detachably attached to the truck body main portion, the battery case is box-shaped by a front plate, a rear plate, and a ring-shaped cylindrical body sandwiched by the front plate and the rear plate, the battery case holding the storage battery with spaces in an upper portion and a front portion of the inside of the battery case being separated from an upper surface and a front surface of the storage battery, respectively, the battery case having a curved groove portion in a front surface upper portion of the front plate, the groove portion being in a shape in which a central portion in a left-right direction protrudes downward.

2. The walkaround electric truck according to claim 1, characterized in that the truck body main portion has: a housing that houses the drive portion; and a surrounding portion provided so as to surround the housing in a manner separated from the housing, the battery case is supported by the surrounding portion.

3. The walkaround electric truck according to claim 2, characterized in that a placement plate is attached above the surrounding portion, the placement plate having a shape along a lower portion shape of the battery case, the battery case being supported in a state of being engaged with the placement plate in a concave-convex manner.

4. The walkaround electric truck according to claim 1, characterized in that a guide ridge is formed on a back surface side of the battery case in a manner separated in a left-right direction, the guide ridge spanning the erected portion of the truck body main portion in a left-right direction.

5. The walkaround electric truck according to claim 1, characterized in that the battery case holds the storage battery with spaces in both side portions of the inside of the battery case being separated from both side surfaces of the storage battery, respectively.

6. The walkaround electric truck according to claim 1, characterized in that the cylindrical body is in a wave shape.

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