Working bench

Abstract

To provide a working bench which enables assembly work and maintenance work of a marine propulsion machine to be performed with higher workability than in a conventional working bench.SOLUTION: A working bench includes: a dolly body 16 including a pair of side members 12, 14 extending in a front-back direction while forming a predetermined gap in a lateral direction; a lifting support part 30 which is provided at the dolly body 16 and supports a marine propulsion machine 100 in a manner that the marine propulsion machine 100 may be moved up or down; and a rotary support part 44 which is provided at the lifting support part 30 and supports the marine propulsion machine 100 in a manner that the marine propulsion machine 100 may rotate around an axis extending in the lateral direction. The lifting support part 30 and the rotary support part 44 are configured to move up or down and rotate the marine propulsion machine 100 so that the marine propulsion machine 100 may be introduced into a space 17 between the side members 12, 14.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a work platform, and more particularly to a work platform used for assembly and / or maintenance work on marine propulsion machines. [Background technology]

[0002] 2. Description of the Related Art A known work cart used in the assembly work of an outboard motor has a lifting device on the cart body, and an outboard motor is attached to the lifting device (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3484346 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, with the promotion of diversity in manufacturing sites, there is a demand for equipment that allows anyone to work uniformly, regardless of differences in physique, physical strength, gender, age, etc. In response to this demand, there is a demand for work platforms (line pallets) and drivable work platforms (work dollies) that allow assembly and maintenance work of marine propulsion equipment such as outboard motors to be carried out more easily than ever before.

[0005] In view of the above background, an object of the present invention is to provide a work platform or a mobile work platform that allows assembly and maintenance work for a marine propulsion device to be performed more easily than before. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention is a work platform (10) used for assembly and / or maintenance work of a marine propulsion unit (100), comprising a main body (16) including a pair of side members (12, 14) extending in a fore-aft direction at a predetermined interval in the left-right direction, a lifting support section (30) provided on the main body and supporting the marine propulsion unit so that it can be raised and lowered up and down, and a rotating support section (44) provided on the lifting support section and supporting the marine propulsion unit so that it can be rotated around an axis extending in the left-right direction, and the lifting support section and the rotating support section are configured so that the marine propulsion unit can be raised and lowered and rotated so that it can be introduced into a space (17) between the side members.

[0007] According to this aspect, the range of motion of the lifting support part and the rotating support part is increased within the range where the marine propulsion unit does not interfere with the work platform, and accordingly the lifting and rotating area of ​​the marine propulsion unit held on the work platform is expanded, making assembly and maintenance work of the marine propulsion unit easy to perform.

[0008] In the above aspect, the main body may have narrow portions (18) in which the spacing between the outer edges of the side members is narrow, and wide portions (20) in which the spacing between the outer edges is wide, at the front and rear.

[0009] According to this aspect, when working at the left and right side positions of the work platform, the worker can position himself / herself on the side corresponding to the narrow portion, thereby getting closer to the marine propulsion unit being worked on, thereby improving workability at the left and right side positions of the work platform.

[0010] In the above embodiment, the front end (18A) side of the narrow portion may be open.

[0011] According to this aspect, when the marine propulsion device rotates downward to enter the space between the side members, the main body does not become an obstacle.

[0012] In the above aspect, the lift support portion and / or the rotation support portion may be provided on the wide portion.

[0013] This aspect improves the lateral stability of the work platform.

[0014] In the above aspect, the main body may have a platform portion (45) provided on the side members rearward of the lift support portion and / or the rotation support portion to connect the side members to each other.

[0015] According to this aspect, the platform portion also serves as a cross member, thereby reducing the number of parts.

[0016] In the above aspect, the work platform may have an operation panel (54, 56) for the lifting support portion and / or the rotating support portion, which is arranged on the side of the platform portion.

[0017] According to this aspect, the operation panel is easy to operate.

[0018] In the above aspect, the work platform may have a drive unit (46) for the lift support and a power supply unit (48) in the wide portion.

[0019] This aspect improves the lateral stability of the work platform.

[0020] In the above aspect, the drive unit and / or the power supply unit may include a portion located below the side member.

[0021] According to this aspect, the center of gravity of the work platform is lowered, improving the stability of the work platform.

[0022] In the above aspect, the work platform may have a removable protection bar (94) extending horizontally in the left-right direction above the main body in front of the lifting support portion.

[0023] According to this aspect, the marine propulsion machine held on the work platform is prevented from falling to the upper surface of the main body.

[0024] In the above aspect, the protect bar may be provided below the rotation support portion.

[0025] According to this aspect, the marine propulsion unit attached to the rotation support portion is prevented from falling to the upper surface of the main body.

[0026] In the above aspect, the work platform may have a running portion provided on the main body.

[0027] According to this aspect, the main body is capable of traveling.

[0028] In the above aspect, grips (60) for pushing and pulling the work platform may be provided at the left and right positions of the rear part of the main body.

[0029] According to this aspect, the ease with which a worker can push and pull the work platform is improved.

[0030] In the above embodiment, the main body may have a travel stopping device (62) including a braking member (66) that can be pressed against a floor surface (F).

[0031] According to this aspect, the work platform can be stopped at any travel position on the floor surface.

[0032] In the above aspect, an operating member (76) for operating the braking member may be provided on one side of the rear portion of the main body.

[0033] According to this aspect, the operability of the braking member is improved.

[0034] In the above aspect, the work platform may have a rollover prevention member (80) that fits from below into an overhang member (78) provided on the floor surface.

[0035] According to this aspect, the work platform is prevented from tipping over.

[0036] In the above-mentioned aspect, the workbench may have a stopper member (82) attached to the main body and resiliently biased in an engagement direction to engage with the rear end (78C) or the front end (78D) of the overhang member, and an operating member (90) provided on the other side of the rear of the main body for releasing the stopper member from engagement with the overhang member.

[0037] According to this aspect, the stopping position of the work platform can be determined with good reproducibility. Effect of the Invention

[0038] According to the above-described aspect, assembly and maintenance work for a marine propulsion device can be performed more easily than in the past. [Brief description of the drawings]

[0039] [Figure 1] FIG. 1 is a side view showing one state of an embodiment in which the work platform according to the present invention is configured as a traversable work cart; [Diagram 2] FIG. 11 is a side view showing another state of the work platform of the present embodiment. [Diagram 3] FIG. 1 is a plan view of a work platform according to an embodiment of the present invention; [Figure 4] FIG. 2 is a rear view of the work platform of the present embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] Hereinafter, one embodiment in which a work platform according to the present invention is configured as a travellable work cart will be described with reference to Figs. 1 to 4.

[0041] 1 to 3, the work cart 10 has a cart body 16 including a pair of side members 12, 14 extending in the front-rear direction at a predetermined interval in the left-right direction. The work cart 10 is used for assembly and / or maintenance work of an outboard motor 100, which is a marine propulsion unit.

[0042] The side members 12, 14 each have a rectangular closed cross-sectional shape having the same width (dimension in the left-right direction) and height dimensions over the entirety. The side members 12, 14 each have a curved shape that is symmetrical in left-right view.

[0043] 3, due to the bent shape of the side members 12, 14, the bogie body 16 has a narrow portion 18 at the front where the distance A between the outer edges of the side members 12, 14 is narrow, and a wide portion 20 at the rear where the distance B between the outer edges is wider than that of the narrow portion 18. In other words, the bogie body 16 has, at the front and rear, the narrow portion 18 where the distance A between the outer edges of the left and right side members 12, 14 is narrow, and the wide portion 20 where the distance B between the outer edges is wider than that of the narrow portion 18.

[0044] The front end portions 18A of the narrow portions 18 of the side members 12 and 14 form free ends, and the front end portions 18A of the narrow portions 18 are open, as shown in Fig. 3. Shock absorbers 15 are affixed to the inner corners of the narrow portions 18 of the side members 12 and 14 to protect the outboard motor 100.

[0045] Left and right front running wheels 24 and left and right rear running wheels 26 forming running parts are attached by brackets 22 to the lower part of the cart body 16, more specifically, to the lower parts of the front and rear ends of each of the side members 12, 14. The front running wheels 24 are composed of swiveling casters. The rear running wheels 26 are attached to the side members 12, 14 so as not to be able to swivel. The wide parts 20 to which the rear running wheels 26 are attached contribute to increasing the lateral stability of the work cart 10.

[0046] 1 to 3, a lifting support device 30 (lifting support part) that supports the outboard motor 100 so that it can be raised and lowered in the vertical direction is attached to the wide portion 20 of the carriage body 16. The lifting support device 30 is of a hydraulic type and has a square cylindrical fixed member 32 including a cylinder bore 32A, and a square rod-shaped movable member 34 that fits into the cylinder bore 32A (see FIG. 3) so as to be slidable in the vertical direction and moves up and down relative to the fixed member 32.

[0047] The fixed-side member 32 is fixed to the side members 12, 14 at the wide portion 20 by left and right brackets 28, and also serves as a cross member connecting the side members 12, 14 to each other at the wide portion 20. The fixed-side member 32 is located in the space 21 (see FIG. 3) between the side members 12, 14 at the wide portion 20, and includes a lower portion 32B that passes through the space 21 in the vertical direction and extends below the side members 12 and 14 as shown in FIGS. 1 and 2, i.e., the lower portion 32B that is located under the floor of the cart body 16. This lowers the lowest position of the transom member 40, which will be described later, and also lowers the center of gravity of the work cart 10.

[0048] The movable member 34 includes an upper portion 34A extending upward from the upper end of the fixed member 32. An arm portion 38 extending forward from the front surface of the upper portion 34A is integrally provided with the upper portion 34A. A transom member 40 to which the outboard motor 100 can be attached is provided at the tip of the arm portion 38, which corresponds to a transom board that forms part of the hull to which the outboard motor 100 is attached.

[0049] The outboard motor 100 has a hull mounting portion 102 that is fixed to the transom member 40 , and an outboard motor main body 106 that is rotatable about the axis of a tilt shaft 104 that extends in the left-right direction relative to the hull mounting portion 102 .

[0050] As shown in FIGS. 1 and 2, the outboard motor 100 is equipped with an electric tilt-up device 108 that drives the outboard motor main body 106 to rotate about the axis of the tilt shaft 104 relative to the hull mounting part 102.

[0051] The transom member 40 and the tilt-up device 108 form a rotation support portion 44 that is provided on the lifting support device 30 and supports the outboard motor 100 rotatably about the axis of a tilt shaft 42 extending in the left-right direction.

[0052] Since the lifting support device 30 and the rotary support portion 44 are provided on the wide portion 20, the lateral stability of the work cart 10 is improved.

[0053] The lifting support device 30 and the rotating support part 44 are configured so that the outboard motor 100 attached to the rotating support part 44 can be raised, lowered and rotated so as to be able to be introduced into the space 21 between the side members 12, 14 in the wide portion 20 and the space 17 between the side members 12, 14 in the narrow portion 18 (see Figure 3).

[0054] This means that the outboard motor 100 does not interfere with the side members 12, 14 when the outboard motor 100 is lowered to its maximum and rotated forward to its maximum (maximum rotation clockwise around the tilt shaft 104 as viewed in Figures 1 and 2) by the lifting support device 30 and the rotating support part 44. The space 17 in the narrow portion 18 and the space 21 in the wide portion 20 are continuous with each other in the front-to-rear direction.

[0055] The maximum rearward rotation angle of the outboard motor 100 by the rotating support part 44 is set so that the outboard motor 100 does not interfere with the operation panels 54 and 56, which will be described later, during the maximum rearward rotation of the outboard motor 100 by the rotating support part 44 (counterclockwise rotation around the tilt shaft 104 as viewed in Figures 1 and 2).

[0056] As shown in Figs. 1 to 3, the cart body 16 has a flat platform portion 45 (footrest portion) provided to connect the side members 12, 14 to each other behind the lifting support device 30 of the side members 12, 14. The platform portion 45 also serves as a cross member that connects the side members 12, 14 to each other at the wide portion 20. Since the platform portion 45 also serves as a cross member, the number of parts can be reduced. An operator can stand on the platform portion 45.

[0057] A hydraulic drive unit 46 of the lifting support device 30 and a power supply unit 48 including a secondary battery are provided under the floor of the platform portion 45 provided in the wide portion 20. As a result, the drive unit 46 and the power supply unit 48 are disposed below the left and right side members 12, 14.

[0058] By positioning the heavy drive equipment unit 46 and power supply unit 48 below the left and right side members 12, 14, the center of gravity of the work cart 10 is lower than in the case where they are positioned above the side members 12, 14, and the stability of the work cart 10 is improved.

[0059] Rectangular electric equipment boxes 50 and 52 are provided on both the left and right sides of the platform portion 45. The electric equipment boxes 50 and 52 are electrically connected to the lifting support device 30, the rotary support portion 44, the drive device unit 46, and the power supply unit 48, and house electric equipment for controlling the lifting support device 30 and the rotary support portion 44.

[0060] Operation panels 54 and 56 for operating the lifting support device 30 and the rotary support part 44 are provided on the upper parts of the electric equipment boxes 50 and 52. The operation panels 54 and 56 are at a height that allows easy operation by an operator from the floor surface on the left and right outer sides of the electric equipment boxes 50 and 52, where the drive equipment unit 46 and the power supply unit 48 are located, and the operation panels 54 and 56 are located on both sides of the platform part 45, providing good operability. The operation panels 54 and 56 are located at positions separated from each other by the lateral dimension of the platform part 45, and therefore do not interfere with the outboard motor 100 supported by the rotary support part 44.

[0061] Since the driving equipment unit 46 and the power supply unit 48, which are heavy objects, are mounted on the wide portion 20, the lateral stability of the work cart 10 is improved. The driving equipment unit 46 and the power supply unit 48, the electric equipment boxes 50 and 52, and the operation panels 54 and 56 are located one above the other at the same front-rear and left-right positions. This simplifies the route of the wire harnesses electrically connecting the driving equipment unit 46 and the power supply unit 48, the electric equipment boxes 50 and 52, and the operation panels 54 and 56, and shortens the length of the wire harnesses. Furthermore, electrical maintenance work on these components can be easily performed.

[0062] 3 and 4, a front panel 58 is erected on the front of the platform portion 45. This defines a roughly box-shaped operator riding space on the platform portion 45, with the left and right outer sides bounded by the electrical equipment boxes 50 and 52 and the front side bounded by the front panel 58.

[0063] 1 to 3, grips 60 made of vertical bars for pushing and pulling the cart body 16 are provided at the left and right positions at the rear of the electric equipment boxes 50 and 52, in other words, at the left and right positions at the rear of the cart body 16. The presence of the grips 60 at the left and right positions at the rear of the cart body 16 provides good operability in pushing and pulling the work cart 10.

[0064] 4, a travel stop device 62 is provided at the left-right center of the rear of the cart body 16. The travel stop device 62 (floor lock device) has a cylindrical support 64 suspended from the left-right center of the rear of the cart body 16 toward the floor surface F, a mover 68 that is fitted into the cylindrical support 64 so as to be slidable in the vertical direction and includes a rectangular flat plate-shaped braking member 66 at its lower end that protrudes downward from the cylindrical support 64, and a compression coil spring 70 that is provided on the cylindrical support 64 and resiliently presses the braking member 66 toward the floor surface F.

[0065] The travel stopping device 62 presses the brake member 66 against the floor surface F by the spring force of the compression coil spring 70, thereby stopping the travel of the work cart 10 by friction with the floor surface F. This allows the work cart 10 to be stopped accurately at any travel position on the floor surface F.

[0066] A pole 72 is erected on one side (the right side) of the rear of the cart body 16. An unlocking lever 76 connected to the mover 68 by a linking cable 74 (Bowden cable) is attached to the pole 72 as an operating member for releasing the braking member 66. The unlocking lever 76 is provided at a position where it can be grasped by the right hand while the right hand is grasping the right grip 60.

[0067] When the unlock lever 76 is not operated (released state), the travel stop device 62 is in a braking state (travel stop state) in which the braking member 66 is pressed against the floor surface F by the spring force of the compression coil spring 70, and when the unlock lever 76 is operated, the braking member 66 is pulled up against the spring force of the compression coil spring 70, thereby releasing the braking state.

[0068] This allows the braking member 66 to be operated with good operability by the lock release lever 76. The work cart 10 can travel only when the lock release lever 76 is operated by an operator. The work cart 10 travels when the operator grasps the grip 60 from the rear of the work cart 10 and pushes the work cart 10 forward while operating the lock release lever 76.

[0069] The travel stop device 62 stops the work cart 10 at any position on the floor surface F. Since the travel stop device 62 is located at the rear of the cart body 16, it is easy for an operator to visually check the state of the travel stop device 62 when manually pushing the work cart 10 as described above. Since the braking member 66 is rectangular, it is easy for an operator to understand the direction of the work cart 10 by visually checking the braking member 66.

[0070] In an assembly line or the like, an overhang member 78 is fixed to the floor surface F of a work station where a work cart 10 stops. The overhang members 78 are rail-shaped having a predetermined length in the extending direction of the assembly line, and are provided close to both the left and right sides of the work cart 10. As shown in Fig. 4, each overhang member 78 has a horizontal piece 78B that extends from the upper end of a vertical piece 78A standing upright from the floor surface F so as to approach the work cart 10.

[0071] A rollover suppression member 80 is fixed to the lower part on both the left and right sides of the cart body 16. As shown in FIG. 4, each rollover suppression member 80 has a horizontal piece 80B that extends from the lower end of a vertical piece 80A hanging down from the cart body 16 so as to approach the corresponding overhang member 78. The horizontal piece 80B of each rollover suppression member 80 enters under the horizontal piece 78B of the corresponding overhang member 78 at the work station. When the work cart 10 tilts in the rollover direction, the horizontal piece 80B of the rollover suppression member 80 engages with the horizontal piece 78B of the overhang member 78. This suppresses rollover of the work cart 10 stopped at the work station, improving safety.

[0072] As shown in Figs. 1 and 2, claw-shaped stopper members 82 are rotatably attached to the lower portions of both the left and right sides of the carriage body 16. The stopper members 82 are biased by a torsion coil spring 84 in a direction in which they engage with the rear end 78C of the overhang member 78. When the stopper members 82 engage with the rear end 78C of the overhang member 78 by the spring force of the torsion coil spring 84, the work carriage 10 is prohibited from moving forward at the work station in addition to the travel stopping action by the travel stopping device 62. As a result, the work carriage 10 is stopped reliably at a predetermined position at the work station with good repeatability. This contributes to improving the repetitive workability at the work station.

[0073] 4, a pole 86 is erected on the other side (left side) of the rear of the dolly body 16. A stopper release lever 90 connected to the stopper member 82 by a linking cable 88 (Bowden cable) is attached to the pole 86 as an operating member for releasing the stopper member 82 from engagement with the overhang member 78. The stopper release lever 90 is provided at a position where it can be grasped by the left hand while the left grip 60 is being grasped by the left hand.

[0074] 1 to 3, the poles 72, 86, the lock release lever 76, and the stopper release lever 90 are omitted, and the grip 60 is omitted in FIG.

[0075] When the stopper release lever 90 is operated, the stopper member 82 is pulled up and disengaged from the rear end 78C of the overhang member 78. After disengagement, the work cart 10 moves forward a little, and when the stopper member 82 climbs up onto the horizontal piece 78B of the overhang member 78, the stopper release lever 90 may be released. When the work cart 10 moves forward further, the stopper member 82 slides on the horizontal piece 78B while being pressed against the horizontal piece 78B of the overhang member 78 by the spring force of the torsion coil spring 84, and climbs over the overhang member 78. This contributes to improving the operability of the work cart 10 when being pushed manually while traveling.

[0076] A pole 92 is provided upright in front of the lifting support device 30 of the side members 12 and 14. As shown in Fig. 2, when the outboard motor 100 is in a raised position by the lifting support device 30, a protection bar 94 extending horizontally in the left-right direction above the carriage body 16 is attached between the upper ends of the pole 92 of the side member 12 and the pole 92 of the side member 14. The protection bar 94 is located below the transom member 40 that forms part of the pivot support part 44, and abuts against the transom member 40 to limit the descent of the transom member 40.

[0077] By limiting the descent of the transom member 40, the outboard motor 100 attached to the transom member 40 is prevented from descending to a position where it would come into contact with the upper surface of the dolly body 16 or the floor surface F. This prevents the outboard motor 100 from being damaged by coming into contact with the upper surface of the dolly body 16 or the floor surface F.

[0078] As shown in FIG. 1, when the outboard motor 100 is lowered by the lifting support device 30, the protection bar 94 is removed from the pole 92 to avoid interference with the outboard motor 100.

[0079] The outboard motor 100 is attached to the work platform 10 by suspending the outboard motor 100 from the suspension hook 120 of a hoist suspended from the ceiling, as shown in FIG. 1, and attaching the hull mounting portion 102 of the outboard motor 100 to the transom member 40.

[0080] The outboard motor 100 attached to the transom member 40 is raised and lowered by the lifting support device 30 so that the height from the floor surface F is adjusted continuously so that the height is easy for an operator to perform depending on the type of work to be performed on the outboard motor 100. Also, the outboard motor 100 is rotated about the axis of the tilt shaft 42 by the rotating support part 44 so that the outboard motor 100 is in an inclined position that is easy for an operator to perform depending on the type of work to be performed on the outboard motor 100, and the inclined position is adjusted continuously.

[0081] 1 shows a state in which the outboard motor 100 has been lowered and rotated counterclockwise about the axis of the tilt shaft 42 and tilted backward. Note that FIG. 1 shows a state in which the outboard motor 100 (see FIG. 2) has been removed.

[0082] In this state, the ease of installation of parts in the middle and lower parts of the outboard motor 100 is improved.

[0083] 2 shows the outboard motor 100 in a raised and upright state due to rotation about the axis of the tilt shaft 42. In addition, in FIG. 2, the outer shell 114 of the outboard motor 100 is attached.

[0084] When the outboard motor 100 is in an upright position, the lower end members 110 of the side members 12 and 14 enter the space 17 between the side members 12 and 14 at the narrow portion 18. This prevents the lower end member 110 of the outboard motor 100 and the propeller 112 attached to the lower end member 110 from interfering with the side members 12 and 14. Because the front end portion 18A of the narrow portion 18 is open, the carriage body 16 does not obstruct the outboard motor 100 from entering the space 17 by rotating about the axis of the tilt shaft 42 in the clockwise direction as viewed in Figures 1 and 2.

[0085] In this state, the ease of installation of parts in the middle and upper parts of the outboard motor 100 is improved.

[0086] Because the outboard motor 100 can be introduced into the space 17 between the side members 12 and 14 of the narrow portion 18, the range of motion of the lifting support device 30 and the rotating support part 44 within the range where the outboard motor 100 does not interfere with the work cart 10 is expanded, and accordingly the area in which the outboard motor 100 can be lifted and rotated while held on the work cart 10 is expanded, making it possible to efficiently perform assembly and maintenance work on the outboard motor 100.

[0087] 3, work on the outboard motor 100 attached to the transom member 40 can be performed from a position (rear position) on the platform portion 45, a position in front of the work cart 10, or a position on either the left or right side of the work cart 10. Work from a position on the platform portion 45 is suitable for work at a high position.

[0088] When working at the left and right side positions of the work platform 10, as shown in Fig. 3, the worker positions himself / herself on the side corresponding to the narrow portion 18, so that the worker can get closer to the outboard motor 100 than the wide portion 20. This improves workability at the left and right side positions of the work platform 10.

[0089] As a result, various tasks can be performed efficiently in a natural posture regardless of the worker's physique, physical strength, sex, or age.

[0090] Although the specific embodiment has been described above, the present invention is not limited to the above embodiment and can be modified in a wide range of ways. For example, the pivot support 44 for tilting the outboard motor 100 up and down may be provided on the work platform 10 instead of the outboard motor 100. The lifting support device 30 or the pivot support 44 may be provided on the narrow width portion 18. The stopper member 82 may be structured to engage with the front end 78D of the overhang member 78 or the front end 78D and the rear end 78C. The traveling portion of the outboard motor 100 may be an endless track instead of the front traveling wheel 24 and the rear traveling wheel 26. Parts of the left and right poles 72, 86 may also serve as the grips 60.

[0091] The work cart 10 may be used for maintenance work on the outboard motor 100 in addition to assembly work on the outboard motor 100. The work cart 10 may be used for assembly and / or maintenance work on marine propulsion devices other than the outboard motor 100.

[0092] The present invention is not limited to the above-described work platform 10, and may be a work platform from which the running parts including the front running wheels 24 and the rear running wheels 26 are omitted. [Explanation of symbols]

[0093] 10: Work trolley 12: Side member 14: Side member 16: Cart body (main body) 17: Space 18: Narrow part 18A: Front end 20: Wide section 24: Front running wheel 26: Rear running wheel 30: Lifting support device 40: Transom member 44: Rotation support part 45: Platform section 46: Drive unit 48: Power supply unit 54:Operation panel 56:Operation panel 60: Grip 62: Travel stop device 76: Lock release lever 78: Overhanging member 78C: Rear end 78D: Front end 80: Rollover prevention member 82: Stopper member 90: Stopper release lever 94: Protect Bar 100: Outboard motor 102: Hull attachment part 104: Tilt axis 106: Outboard motor body 108: Tilt-up device F: Floor surface

Claims

1. A work platform used for assembly and / or maintenance of a marine propulsion device, a main body including a pair of side members extending in a front-rear direction at a predetermined interval in a left-right direction; a lift support portion provided on the main body and configured to support the marine vessel propulsion unit so that the marine vessel propulsion unit can be lifted and lowered vertically; a rotation support portion provided on the lift support portion and configured to support the marine vessel propulsion unit so as to be rotatable about an axis extending in the left-right direction; The lifting support portion and the rotating support portion are configured to be liftable and rotatable so that the marine propulsion unit can be introduced into the space between the side members.

2. 2. The workbench according to claim 1, wherein the main body has a narrow portion at the front and rear where the spacing between the outer edges of the side members is narrow, and a wide portion at the front and rear where the spacing between the outer edges of the side members is wide.

3. 3. The workbench according to claim 2, wherein the front end side of the narrow portion is open.

4. 4. The workbench according to claim 2, wherein the lift support portion and / or the rotation support portion is provided on the wide portion.

5. The workbench according to any one of claims 1 to 3, wherein the main body has a platform portion provided on the rear side of the lifting support portion and / or the rotating support portion of the side members to connect the side members to each other.

6. 6. The workbench according to claim 5, further comprising an operation panel for the lifting support section and / or the rotating support section, which is disposed on a side of the platform section.

7. 4. The workbench according to claim 2, wherein the wide section has a drive unit and a power supply unit for the lift support section.

8. The workbench according to claim 7 , wherein the drive unit and / or the power supply unit includes a portion located below the side member.

9. 4. The workbench according to claim 1, further comprising a removable protect bar extending horizontally in the left-right direction above the main body in front of the lift support portion.

10. 10. The workbench according to claim 9, wherein the protection bar is provided below the pivot support portion.

11. The workbench according to claim 1 , further comprising a running portion provided on the main body.

12. The workbench according to claim 11, wherein grips for pushing and pulling the main body are provided at the left and right sides of the rear of the main body.

13. The work platform according to claim 11, wherein the main body has a travel stopping device including a braking member capable of being pressed against a floor surface.

14. 14. The workbench according to claim 13, wherein an operating member for operating the braking member is provided on one side of the rear portion of the main body.

15. 4. The work platform according to claim 1, further comprising an overhang member provided on the floor surface, the overhang member being configured to extend from below the overhang member.

16. a stopper member attached to the main body and resiliently biased in an engagement direction to engage with the rear end or the front end of the overhang member; 16. The workbench according to claim 15, further comprising an operating member provided on the other side of the rear portion of the main body for releasing the stopper member from engagement with the overhang member.

Images