JP4666929B2 - Aerial work platform - Google Patents

Description

  The present invention relates to a platform for an aerial work vehicle that is used for work at a high place such as loading, maintenance, inspection, and cleaning of luggage on an aircraft or a ship.

  Such an aerial work vehicle, for example, when carrying in-flight meals, fixtures and baggage in an aircraft, brings the chassis close to the aircraft, and then uses the link mechanism provided on the chassis to establish the aircraft at a high location. An in-flight meal or the like is mounted through a platform extending from the workbench close to the loading port (see, for example, Patent Document 1).

No. 4-8156

  However, since the conventional platform has a square shape with two right-angled corners, if the loading port of the fuselage is adjacent to the upper side of the main wing, if the vehicle is too close to the main wing, the platform will be Since it may be difficult to raise, the operator must always pay attention to the positional relationship between the main wing and the tip of the platform, and there is room for improvement in workability when raising and lowering the platform.

  The problem to be solved by the present invention has been made in view of these facts, and when raising and lowering the platform in high-altitude work, the tip corner of this platform becomes an obstacle, reducing the burden on the operator. It is to improve workability when raising and lowering the platform.

The present invention, in an aerial work vehicle comprising a self-propelled vehicle body having a driver's cab in front, a work table that can be raised and lowered relative to the vehicle wheel, and a platform that projects from the front surface of the work table, The platform is a flat plate having a square shape with two corners at the tip, and at least one of the corners is cut obliquely to provide a defective portion. In this case, the platform is provided with an auxiliary platform that can be pulled forward from the lacking portion of the platform. In this case, the auxiliary platform can be stored and pulled out between the auxiliary platform and the platform. It is preferable to provide the actuator.

Further, in the present invention, the platform is a flat main platform having a square shape with two corners at the tip, and a square shape having two corners at the tip that is housed so as to be able to be drawn forward with respect to the main platform. And at least one of the portions forming the front end corner as the platform is obliquely cut to provide a defect portion or the book. In the present invention, the platform has a square main platform having a square shape with two corners at the tip, and a square shape having two corners at the tip, which is housed so as to be able to be drawn forward with respect to the main platform. A flat first auxiliary platform and the main platform And a flat second sub-platform having a square shape with two corners at the tip, and at least when the sub-platform is stowed, the tip corner as the platform is formed. At least one of the portions is cut obliquely to provide a defect portion.

That is, when the platform is composed of at least one pair of a main platform and a sub-platform, and the sub-platform protrudes from the main platform when the sub-platform is stored, and a corner thereof forms a tip corner as a platform, at least It is only necessary to provide an oblique defect in the secondary platform. Similarly, if the main platform protrudes from the secondary platform when the secondary platform is stored, and the corner is a portion that forms the tip corner as the platform, at least the main platform. What is necessary is just to provide a diagonal defect | deletion part in a platform. Further, in the case where an oblique defect portion is provided on each of the main platform and the sub platform, the tips of these defect portions may be aligned with each other. Also, the shape of the missing portion may be a shape that does not interfere with the tip end corner of the platform, such as a shape obtained by cutting the tip corner of the main platform or the sub platform in a straight line or a curved shape.

Then, wherein the secondary platform, an auxiliary platform can be pulled out forwardly from the defect of the secondary platform.

  Alternatively, in the case of providing an auxiliary platform, the auxiliary platform includes a biasing force generating element that urges the auxiliary platform forward and pushes the auxiliary platform forward from the auxiliary platform. In the meantime, an interlocking storage means for storing the auxiliary platform in the secondary platform in conjunction with the storage operation of the secondary platform may be provided.

According to the present invention, at least one of the front end corners of the platform is cut obliquely to provide a defect portion, so that the platform can be compared with a conventional platform in which the front end of the platform is a square having two corners. The burden on the operator caused by the work performed when moving up and down, for example, the positioning between the main wing and the tip of the platform and the fine adjustment when the platform is raised and lowered is reduced. For this reason, according to this invention, workability | operativity at the time of raising / lowering a platform can be improved.

  Furthermore, in the present invention, if an auxiliary platform that can be pulled forward from the missing portion of the platform is provided, a wider space can be secured when the platform is lifted.

  In addition, when the auxiliary platform is provided, if the actuator is provided between the auxiliary platform and the platform so that the auxiliary platform can be stored and pulled out, the auxiliary platform can be easily inserted and removed. Can be improved.

On the other hand, in the present invention, the platform has a flat plate-shaped main platform having a tip with two corners, and is housed so as to be able to be drawn forward with respect to the main platform, and has two corners at the tip. A flat plate-shaped sub-platform having a square shape, and at least one of the portions forming the tip corner as the platform at the time of storing the sub-platform is obliquely cut to provide a defect portion. If so, in addition to improving workability when raising and lowering the platform, it is possible to secure a wide space for working by raising the platform by the amount corresponding to the sub platform. In addition, according to such a configuration, when the corner of the secondary platform is stored so as to overlap the corner of the main platform, the maximum width of the secondary platform can be ensured relative to the width of the main platform. As a result, the work space as a secondary platform can be secured to the maximum.

Alternatively, in the present invention, the platform includes a flat main platform having a square shape with two corners at the tip, and a square shape having two corners at the tip which is housed so as to be able to be drawn forward with respect to the main platform. A flat plate-like first sub-platform, and a flat plate-like second sub-platform that is housed so as to be able to be pulled out forward with respect to the main platform and has a square shape with two corners at the tip. Yes, even when at least one of the portions forming the tip corner as the platform is obliquely cut and provided with a missing portion when the sub-platform is stored, the workability when raising and lowering the platform is improved. In addition, the space when working with the platform raised by the amount of the secondary platform. It is possible to secure a wide. In addition, in this case, since the two sub-platforms can be taken in and out separately from the main platform, for example, even if the machine door is open, the interference between the tip of the sub-platform and the machine door can be prevented.

  Furthermore, in the present invention, if an auxiliary platform that can be pulled forward from the missing portion of the sub-platform is provided, a wider space can be secured when the platform is lifted.

  In addition, when the auxiliary platform is provided, if the actuator is provided between the auxiliary platform and the sub-platform so that the auxiliary platform can be stored and pulled out, the auxiliary platform can be easily put in and out. Workability can be improved.

  Alternatively, when the auxiliary platform is provided, an urging force generating element such as a gas damper is provided between the auxiliary platform and the auxiliary platform to urge the auxiliary platform forward and push out from the auxiliary platform. If interlock storage means for storing the auxiliary platform is provided in the sub platform in conjunction with the storage operation of the sub platform between the main platform and the sub platform is pushed out of the main platform when the platform is formed, The auxiliary platform can be automatically pushed out of the sub-platform in conjunction with the pull-out movement of the sub-platform by the force generating element to complete the platform. If the platform is stored in the main platform, the interlocking storage means can automatically store the auxiliary platform in the auxiliary platform in conjunction with the storage operation of the auxiliary platform. Can be improved.

  The interlocking storage means includes a link mechanism and a cam mechanism provided between the auxiliary platform and the main platform. In particular, as the cam mechanism, one of the auxiliary platform and the main platform swings. If an auxiliary platform is used that is provided on the other platform and includes a guide portion that slides the distal end of the follower in a direction in which the auxiliary platform is accommodated in the auxiliary platform when the auxiliary platform is accommodated. The structure for moving the platform in and out is a simple structure of the urging force generating element and the cam mechanism, so that the manufacturing cost can be reduced, and the operation for moving the auxiliary platform in and out requires no external energy supply. Friendly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the direction in which the cab is located is defined as the front, and the vertical and horizontal directions are defined as directions viewed from the driver.

  FIG. 1 is a side view showing a lift truck 100 which is an embodiment of the present invention and has a box-type cargo bed which is used in an airport or the like and mounts an in-flight meal or the like in an aircraft.

  The lift truck 100 includes a self-propelled chassis 120 having a driver's cab 110 in front, a pantograph-type link mechanism 130 provided on a chassis frame 121 mounted on the chassis 120, and A box-type loading platform (work platform) 140 that moves up and down. Stabilizing hydraulic jacks 122 are provided at four positions on the front, rear, left and right of the chassis frame 121 in order to ensure stability against the wind pressure when the box-type cargo bed 140 is raised.

  The link mechanism 130 is attached between the two side links 131 arranged in parallel with the left and right, the two outside links 132 arranged in parallel with the left and right, the link shaft 133 that rotatably supports the side links 131 and 132, and the side links 131 and 132. And a hydraulic lift cylinder 134.

  The inside links 131 are integrally connected to each other in the vicinity of their upper ends by a front shaft 151, and their lower ends are supported so as to be movable along the chassis frame 121. The outside links 132 are also integrally connected to each other in the vicinity of their upper ends by a rear shaft 152, and the lower ends thereof are fixedly held on the chassis frame 121 by a fixed shaft 150 so as to be rotatable. Each of the front shaft 151 and the rear shaft 152 is spanned in a rectangular cargo bed frame 160 that holds the box-type cargo bed 140, so that the link mechanism 130 is box-shaped by expansion and contraction of the hydraulic lift cylinder 134. The loading platform 140 is moved up and down while maintaining a state parallel to the road surface with respect to the chassis 120. In this embodiment, a linear motion mechanism including rollers and rails is provided between the box-type carrier 140 and the carrier frame 160, and the carrier frame 160 moves along the beam 160a on the box-type carrier 140. I support it as possible.

  Further, in this embodiment, the box-type loading platform 140 has a platform 200 that is extendable in the forward direction of the vehicle in order to load food and luggage on the aircraft. In a normal state such as when the vehicle is running, the platform 200 is supported in contact with a gantry 123 fixed to a chassis frame 121 as shown in a region A of FIG. Placed in the upper position.

  Also, in this embodiment, a left and right open / close door 143 having a double door structure having two doors on the left and right is provided on the front surface of the box-type loading platform 140, and these doors 143 can be pivoted to the inner wall of the box-type loading platform 140 via hinges, respectively. It is attached to. The open / close door 143 includes a plurality of doors 143a, 143b, and 143c. When the floor surface height of the box-type cargo bed 140 coincides with the floor surface height of the main platform 210 and then opens toward the platform 200, it is shown in a region B. As described above, the platform protection wall is formed by sliding along the platform 200.

  The roof of the box-type loading platform 140 has a canopy 144 for preventing rain that is stored in the roof during driving and taken out when necessary. Improve the working environment. Reference numeral 145 denotes a handrail provided so as to be foldable with respect to the platform 200 as a safety measure for the operator.

  Next, a first embodiment of the platform 200 according to the present invention will be described with reference to FIG. 2 (a) to 2 (c) show the state in which the platform 200 is placed on the gantry 123 and is in a neutral position in which each platform is stored, and the main platform 210 (described later) moves forward from the sub platform 220 (described later). 3A and 3B are top views showing a state in which a later-described auxiliary platform 230 is pulled out from the secondary platform 220 and FIGS. 3A and 3B are views of the main platform 210 and the secondary platform 220, respectively. It is a principal part top view explaining a front-end | tip structure.

  The platform 200 is one independent unit as shown in FIG. 2, and includes a main platform 210, a sub platform 220, and two auxiliary platforms 230, each of which operates independently.

  The main platform 210 is originally a flat plate shape having a tip 211 having two right-angled corners 211e as shown by a solid line in FIG. 3A, and both side surfaces thereof are shown in FIG. As described above, the bracket 213 is integrally provided. Each of the brackets 213 is provided with two rollers 214 in the vertical direction, and these rollers 213 are further attached to two guide rails 142 extending upward from both front side surfaces of the box-type loading platform 140. As a result, the guide rail 142 moves relative to the main platform 210 when the box-type loading platform 140 begins to rise, so that the platform-type loading platform 140 is maintained while maintaining the platform 200 in the position shown in the region A of FIG. However, when the height of the floor surface of the box-type carrier 140 matches the floor surface height of the main platform, the main platform 210 comes into contact with the lower end of the guide rail 142 and is fixedly held on the box-type carrier 140. Therefore, the platform 200 rises together with the box-type carrier 140.

  The sub-platform 220 is also essentially similar to the main platform 210 indicated by the alternate long and short dash line, as shown by the one-dot chain line in FIG. 3A, and the tip 221 of the sub platform 220 is accommodated so as to overlap the corner 211e of the main platform 210. The square having two right-angled corners 221e is a flat plate, and can be moved back and forth with respect to the main platform 210 by known means such as a roller.

  On the other hand, in this embodiment, as shown in FIG. 3B, both the corner 211e of the main platform 210 and the portion S where the corner 221e of the sub-platform 220 overlaps are obliquely cut so that the main platform 210 and The sub-platform 220 is provided with missing portions 212 and 222 indicated by broken lines, respectively. As a result, as shown in FIG. 2A, when the secondary platform 220 is stored in the main platform 210, the tip 221 and the missing portion 222 are also stored overlapping the tip 211 and the missing portion 212 of the main platform. The missing portions 212 and 222 may be provided in at least one of the two portions S depending on the application.

  Further, in this embodiment, when the secondary platform 220 is stored, the portion S that forms the tip corner as the platform 200 is cut and the tips of the defective portions 221 and 222 are aligned with each other. When the sub platform 220 protrudes from the main platform 210 and its corner 221e forms a tip corner as the platform 200, it is sufficient that at least the sub platform 220 is provided with the missing portion 222. Similarly, the sub platform 220 When the main platform 210 protrudes from the sub-platform 220 and the corner 211e forms a tip corner as the platform 200 during storage, at least the missing portion 212 may be provided in the main platform 210. In other words, in the present invention, at least two corners forming the tip corners of the platform 200 when the secondary platform 220 is stored, that is, the two corners 211e of the main platform 210 and the two corners of the secondary platform 220 are provided. What is necessary is just to cut | disconnect the part 221e or at least one of the two corners which consist of the corners 211e and 221e by superimposing the main platform 210 and the subplatform 220, and let it be a defect | deletion part.

  Further, a protector rubber 223 that is a tubular buffer member is provided at the distal end 221 of the sub platform 220, and a hydraulic or electric actuator 240 is provided between the main platform 210 and the protector rubber 223. As a result, the sub-platform 220 moves the main platform 210 in the front-rear direction by the expansion and contraction of the actuator 240, and allows the sub-platform 220 to be pulled out and stored from the tip 211.

As shown in FIG. 2C, the auxiliary platform 230 is a substantially flat plate-like platform that can be pulled forward from the missing portion 222 of the sub-platform 220. In this embodiment, the auxiliary platform 230 has the missing portion 222 of the sub-platform 220. The front end 231 is stored so as to overlap and can be pulled out from the defect 222 in the forward direction. Specifically, the auxiliary platform 230 has a protector rubber 232 that is a tubular buffer member at a tip 231 thereof, and is pivotally supported with respect to the sub platform 220 so as to be rotatable and arranged between the sub platform 220 and the actuator 250. It is possible to pull out and store from the defect 222 by expanding and contracting.

  Next, the specific operation of this embodiment will be described with reference to FIGS. FIG. 4 is a top view of the main part showing a state where the lift truck 100 is stopped near the body 10. FIG. 5 is a side view showing the lift truck 100 together with the airframe 10 and the main wing 11, and FIG. 6 is a top view of a main part showing a working state in which a platform 200 is extended from the lift truck 100 and loads are loaded.

  As shown in FIG. 4, the lift truck 100 normally needs to stop substantially perpendicularly to the airframe 10, but as shown in this figure, the loading port (airframe door) 12 of the airframe 10 is adjacent to the upper side of the main wing 11. In the conventional platform, when the platform is moved up and down, the corner of the tip becomes an obstacle, so the operator must always pay attention to the positional relationship between the main wing 11 and the tip of the platform 200. In other words, there was room for improvement in workability when raising and lowering the platform.

  Therefore, in the lift truck 100 according to the present invention, a path that is joined to the airframe 10 substantially perpendicularly is formed between the box-type loading platform 140 and the mounting port 12 by the following procedure.

  In this embodiment, first, as shown in FIG. 4, after approaching the position of the loading port 12 of the airframe 10 and stopping near, the hydraulic jack 122 is lowered to stabilize the truck 100. Next, the box-type cargo bed 140 is raised by the link mechanism 130 until the floor surface height matches the floor surface height of the mounting port 12. In this case, the leading end of the platform 200 is obtained by obliquely cutting the overlapping portions S of the corners 211e and 221e of the main platform 210 and the sub platform 220 to provide the missing portions 212 and 222 in the main platform 210 and the sub platform 220, respectively. Since the clearance C2 between the corner and the main wing 11 is ensured, the tip corner of the platform 200 does not get in the way even when the box-type carrier 140 is moved up and down. As a result, compared to a conventional platform where the tip of the platform has a square shape with two right-angled corners, the work caused by operations such as positioning between the main wing 11 and the tip of the platform 200 and fine adjustment when the platform is raised and lowered Burden on the person is reduced. For this reason, according to this structure, workability | operativity at the time of raising / lowering the platform 200 can be improved. In addition, in this case, the lift truck 100 can be made to approach the mounting opening 12 as much as the front end corner of the platform 200 does not get in the way, and as a result, the extension amount of the sub platform 220 can be minimized. .

  Next, when the floor surface height of the box-type carrier 140 is raised by the link mechanism 130 until it matches the floor surface height of the loading port 12, the link mechanism 130 is stopped, and then the box-type carrier 140 as shown in FIG. Is slid forward along the carrier frame 160. Then, as shown in FIG. 2B, the actuator 240 is extended and the sub-platform 220 is pulled out from the front end 211 of the main platform 210 in the forward direction. In this case, by providing the sub-platform 220 on the main platform 210, the platform 200 can be set to the target position even in a place where the target position is deep, such as the loading port 12 on the main wing of the aircraft, A space for working by raising the platform 200 can be secured by the amount corresponding to the sub platform 220. In addition, according to such a configuration, as shown in FIG. 3, when the corner 221 e of the sub platform 220 is stored so as to overlap the corner 211 e of the main platform 210, As a result, the lateral width W2 of the secondary platform 220 can be secured to the maximum, so that the working space as the secondary platform 220 can also be secured to the maximum.

  When the secondary platform 220 is pushed out of the main platform 210 to a position where it does not come into contact with the airframe 10 due to the extension of the actuator 240, the actuators 250 are extended respectively from the missing portion 222 of the secondary platform 220 as shown in FIG. Push the auxiliary platform 230 forward toward the fuselage 10. In this case, by providing the auxiliary platform 230, it is possible to further secure a space for working by raising the platform 200.

  Further, in this embodiment, when the auxiliary platform 230 is provided, the actuator 250 that allows the auxiliary platform 230 to be stored and pulled out is provided between the auxiliary platform 230 and the sub platform 220 instead of manually. Since the auxiliary platform 230 can be easily taken in and out, workability at the time of platform formation can be improved.

  By the way, in addition to using the actuator, the configuration as described below can be adopted to put in and out the auxiliary platform 230. FIGS. 7 (a) and 7 (b) are other forms for taking in and out the auxiliary platform 230, respectively, in a state where the platform 200 is placed on the mount 123 and is in a neutral position in which each platform is stored; FIG. 4 is a top view showing a state in which an auxiliary platform 230 is further pulled forward from a sub platform 220 pulled forward from a main platform 210.

  In the present embodiment, the auxiliary platform 230 includes a biasing force generating element 260 for automatically pulling out the auxiliary platform 230 from the secondary platform 220 between the auxiliary platform 230. The urging force generation element 260 is a gas damper that is pivotally supported with respect to the auxiliary platform 230 and the sub platform 220 and urges the auxiliary platform 230 in the forward direction to push out from the defect 222 of the sub platform 220. A metal spring or the like may be used. The auxiliary platform 230 includes interlocking storage means 270 that stores the auxiliary platform 230 in the sub-platform 220 in conjunction with the storage operation of the sub-platform 220 between the auxiliary platform 230 and the main platform 210. This interlocking storage means 270 includes a link mechanism and a cam mechanism that connect two link members in a swingable manner, and connect their respective end portions to the auxiliary platform 230 and the main platform 210. In this embodiment, A cam mechanism is adopted.

  The cam mechanism 270 includes a follower 271 including a lever that swings on the auxiliary platform 230, a cam roller 272 provided at the tip of the lever 271, and a lever platform 271 that is provided on the main platform 210 along with the storing operation of the sub platform 220. The guide roller 273 is configured to slide the cam roller 272 in a direction in which the auxiliary platform 230 is accommodated in the sub platform 220. The guide portion 273 is a block having a linear cam surface, but may be a rail or the like. In the cam mechanism 270, the lever 271 may be provided on the main platform 210, and the guide portion 273 may be provided on the auxiliary platform 230.

  According to such a configuration, when the sub platform 220 is pushed out of the main platform 210 by the extension of the actuator 240 when the platform 200 is formed, the auxiliary platform 230 is automatically moved from the sub platform 220 by the gas damper 260 in conjunction with the pulling operation of the sub platform 220. The platform 200 can be completed by being pushed out and the secondary platform 220 is accommodated in the primary platform 210 by contraction of the actuator 240, so that the cam roller 272 of the lever 271 can accommodate the auxiliary platform 230 in the secondary platform 220. The auxiliary platform 230 can be automatically stored in the sub-platform 220 in conjunction with the storage operation of the sub-platform 220 by sliding the block 273 to improve workability when forming the platform. It can be. In addition, in this case, since the structure for inserting and removing the auxiliary platform 230 is a simple structure of the gas damper 260 and the cam mechanism 270, the manufacturing cost can be reduced, and the operation for inserting and removing the auxiliary platform 230 is also an energy supply from the outside. Because it is unnecessary, it is environmentally friendly.

  Next, the platform 300 according to the second embodiment of the present invention will be described. In the following embodiments, the same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIGS. 8A and 8B are a state in which the platform 300 is placed on the gantry 123 and is in a neutral position in which each platform is stored, and a side view thereof. FIG. 10 is a top view of the main part showing a state in which the main platform 320 is slid to the left side, and FIG. 10 shows a state in which sub platforms 330 and 340 and an auxiliary platform 350 (to be described later) are pulled forward from the main platform 320 slid to the left side. It is a principal part top view shown.

  The platform 300 is an independent unit as shown in FIG. 8, and includes a fixed platform 310, a main platform 320, two sub platforms 330 and 340, and an auxiliary platform 350, each operating independently. .

  The fixed platform 310 is a flat plate having a square shape, and includes a slit 311 having a wide width that opens toward both sides of the front surface of the fixed platform 310, and each side surface has a bracket similar to the first embodiment. 312 is provided integrally. Each of these brackets 312 is also attached with two rollers 313 in the vertical direction, and these rollers 313 are further attached to two guide rails 142 extending upward from both front side surfaces of the box-type cargo bed 140, respectively. As a result, when the box-type loading platform 140 starts to rise, the guide rail 142 raises the box-type loading platform 140 while maintaining the platform 300 in the position shown in the region A of FIG. When the height of the platform 300 coincides with the floor height of the main platform, the platform 300 rises together with the box-type carrier 140.

  In addition, the fixed platform 310 includes a protruding portion 314 protruding forward at the lower front portion of the slit 311. The overhang portion 314 includes a roller 315 at the tip 314t, and the roller 315 supports a main portion 321 of a main platform 320 described later. Note that the overhang portion 314 may have a structure with only a skeleton because of the weight reduction of the fixed platform 310. In addition, a guide rail 316 is provided inside the slit 311, and the guide rail 316 supports a roller 324 provided on a protruding portion 322 of the main platform 320 described later. As a result, the fixed platform 310 supports the main platform 320 slidably along the slit 311.

  As shown in FIG. 8, the main platform 320 has a main portion 321 having a width W2 wider than the width W1 of the fixed platform 310, and a width smaller than the width Ws of the slit 311 of the fixed platform 310 connected to the rear portion of the main portion 321. It has a protrusion 322 having W3 and inserted into the slit 311. Further, a step 323 is formed between the main portion 321 and the protruding portion 322, and the floor 321f of the main platform 320 (main portion 321) is formed by the step 323 as shown in FIG. A flat floor surface is formed so as to coincide with the floor surface 310 f of the fixed platform 310.

  Further, a hydraulic or electric actuator 360 is provided between the fixed platform 310 and the projecting portion 322 of the main platform 320, as shown in FIG. Slide along the width direction of the fixed platform 310.

  Further, as shown in FIGS. 8, 9, and 10, the main platform 320 includes two passages opened in the front surface 320t and having different lateral widths, and an inclined portion 320I having a gentle inclination is formed near the tip. Accordingly, when the first sub platform 330 and the second sub platform 340 are inserted into each passage, the floor surface 321f of the main platform 320 is connected to the floor surface 330f of the sub platform 330 through the inclined portion 320I without a step. At the same time, it is connected to the floor surface 340f of the sub platform 340 through the inclined portion 320I without a step.

  As shown by the broken line in FIG. 10, the sub-platform 330 is a substantially rectangular flat plate projecting from the rear, and includes a protector rubber 331 that is a tubular buffer member on the front surface, and rollers 332 on both side surfaces thereof. In addition, a hydraulic or electric actuator 370 is provided between the main platform 320 and the main platform 320. As a result, the sub platform 330 moves the main platform 320 in the front-rear direction by the expansion and contraction of the actuator 370, and allows the sub platform 330 to be pulled out and stored from the tip 320t. Similarly, as shown by the broken line in FIG. 10, the sub-platform 340 is also a substantially rectangular flat plate with a rear portion protruding, and is provided with a protector rubber 341 that is a tubular buffer member on the front surface, and on both side surfaces thereof. A hydraulic or electric actuator 380 is provided between the roller 342 and the main platform 320. Accordingly, the sub platform 340 also allows the main platform 320 to be moved in the front-rear direction by the expansion and contraction of the actuator 380, and can be pulled out and stored from the tip 320t.

  In this embodiment, the sub platforms 330 and 340 are both moved back and forth only by the rollers 332 and 342, but means such as providing a guide rail that is slidably supported via the rollers 332 and 342 in each of the passages, etc. It may be used. In this embodiment, as shown in FIG. 10, the lateral width W4 of the secondary platform 330 is narrower than the lateral width W5 of the secondary platform 340 (W5> W4), but these lateral widths W4 and W5 may be equal to each other.

  In this embodiment, the main platform 320 is originally a flat plate having a tip 320t having a rectangular shape having two right-angled corners 320e, and the sub-platform 330 has its tip 330t overlapping the corner 320e of the main platform 320. A rectangular shape having a right-angled corner portion 330e to be housed is a flat plate shape. On the other hand, the sub-platform 340 is originally a flat plate having a square shape with a right-angled corner where the tip 340t of the sub-platform 340t is overlapped and housed in the corner of the main platform 320. The portions where the left corner of 320 and the left corner of the sub-platform 340 overlap are cut obliquely to provide the missing portions 325 and 343 in the main platform 320 and the sub-platform 340, respectively. As a result, as shown in FIG. 8A, when the sub platform 340 is stored in the main platform 320, the tip 340t and the missing portion 343 are also stored overlapping the tip 320t and the missing portion 325 of the main platform.

  Also, in this embodiment, when the sub-platform 340 is stored, the portion S forming the tip corner as the platform 300 is cut and the tips of the defective portions 325 and 343 are aligned with each other. In the case where the platform 340 protrudes from the main platform 320 and the corner thereof becomes a portion that forms the tip corner as the platform 300, it is only necessary to provide the defective portion 343 in at least the secondary platform 340. In some cases, when the main platform 320 protrudes from the sub-platform 340 and the corner thereof becomes a portion that forms the tip corner of the platform 300, at least the main platform 320 may be provided with the missing portion 325. In other words, in the present invention, at least when the secondary platform 340 is stored, the corner that forms the tip corner as the platform 300, that is, the left corner of the main platform 320, the left corner of the secondary platform 340, or the main corner. What is necessary is just to cut | disconnect the left side corner part which consists of a corner by the overlap of the platform 320 and the subplatform 340, and let it be a defect | deletion part. It should be noted that the defect portion may be provided only between the right corner portion 320e of the main platform 320 and the right corner portion 330e of the sub platform 330 or together with the defect portions 325 and 343, in this case. , At least when the secondary platform 340 is stored, a corner that forms the tip corner of the platform 300, that is, the right corner 320e of the main platform 320, the right corner 330e of the secondary platform 330, or the main platform 320 and the secondary platform 330. It is also possible to cut the left corner formed by the corners 320e and 330e resulting from the superposition of the above and form a defective portion.

  As shown in FIG. 10, the auxiliary platform 350 has a substantially fan-shaped flat plate shape as in the first embodiment, and has a tip 350 t that is stored so as to overlap with the missing portion 343 of the sub platform 340. Can be pulled forward. In this case, the auxiliary platform 350 also has a protector rubber 351, which is a tubular buffer member, at the tip 350t thereof, as shown in FIG. 2, by expansion / contraction of an actuator disposed between the sub platform 340 and the auxiliary platform 350, or The gas damper disposed between the auxiliary platform 340 and the auxiliary platform 350 and the cam mechanism disposed between the main platform 320 and the auxiliary platform 350 allow the drawing and storage from the defect 343.

  Next, the specific operation of this embodiment will be described with reference to FIGS.

  FIG. 11 is a top view of relevant parts showing a state where the lift truck 100 is stopped near the fuselage 10. 12 is a top view of the main part showing a state where the auxiliary platforms 330 and 340 and the auxiliary platform 350 are bridged over the loading port 12, and FIG. 13 shows the platform 300 extended from the lift truck 100 to load luggage and the like. It is a principal part top view which shows a working state.

When the loading port 12 of the fuselage 10 is at the upper part of the main wing 11 and the door 13 is opened outwardly to the left, as shown in FIG. 11, when the lift truck 100 is stopped, the clearance with the engine 14 is removed. C1 is 1.1 meters, and the horizontal distance C2 between the left tip corner of the platform 300 and the main wing 11 must be 1 meter or more. In this case, since the other vehicle 400 is stopped on the right side of the vehicle, the lift truck 100 needs to stop substantially perpendicularly to the airframe 10 as shown in FIG.

  Therefore, the lift truck 100 according to the present invention forms a passage that is joined to the airframe 10 substantially vertically between the box-type cargo bed 140 and the mounting port 12 by following the following procedure.

  In this embodiment, first, as shown in FIG. 11, after approaching the position of the loading port 12 of the airframe 10 to the vicinity and stopping, the hydraulic jack 122 is lowered to stabilize the truck 100. Next, the box-type cargo bed 140 is raised by the link mechanism 130 until the floor surface height matches the floor surface height of the mounting port 12. In this case, by providing the missing portions 325 and 343 in the main platform 320 and the sub platform 340, respectively, as in the first embodiment, the tip of the platform is a square shape having two right-angled corners. Thus, the burden on the worker caused by operations such as positioning between the main wing 11 and the tip of the platform 300 and fine adjustment during platform lifting is reduced. For this reason, according to such a configuration, workability when raising and lowering the platform 300 can be improved, and the extension amount of the sub platforms 330 and 340 can be minimized.

  Next, when the floor surface height of the box-type carrier 140 is raised by the link mechanism 130 until it matches the floor surface height of the loading port 12, the link mechanism 130 is stopped and the box-type carrier 140 is moved along the carrier frame 160. And slide it forward (see FIG. 5). Then, as shown in FIG. 9, the actuator 360 is extended to slide the main platform 320 to the left (upward in the drawing) with respect to the fixed platform 310. In this case, a slit 311 opened toward the both side surfaces is provided on the front surface of the fixed platform 310, and a protrusion 322 of the main platform 320 having a narrower width than the slit 311 is inserted, and the remaining portion of the main platform (main part) 321) is supported by a flat plate-like overhanging portion 314 provided at the lower part of the front surface of the fixed platform 310, the width W2 of the floor surface 321f of the main platform 320 is secured to be equal to or wider than the width W1 of the fixed platform 310. However, the main platform 320 can be slid with respect to the fixed platform 310. In this case, a wide work space can be secured while maintaining the function of sliding the main platform 320 with respect to the fixed platform 310. In addition, according to this configuration, since the lateral width W3 of the protrusion 322 of the main platform 320 is narrower than the lateral width Ws of the slit 311 of the fixed platform 310, as a result, the sliding amount of the main platform 320 increases. Even when the lateral width W2 of the floor surface 321f is secured to be equal to or wider than the lateral width W1 of the fixed platform 310, the required sliding amount of the main platform 320 can be secured.

  Thereafter, as shown in FIG. 10, the actuators 370 and 380 are extended to push the sub platforms 330 and 340 forward (right side in the drawing) from the main platform 320 toward the body 10. In this case, as shown in FIG. 12, the sub platform 340 is positioned at a position where the protector rubber 341 does not come into contact with the body 10 using the actuator 380, and the auxiliary platform 350 is pushed out from the defect portion 343. The sub-platform 330 is positioned at a position where the protector rubber 331 does not wrap with the body door 13 using the actuator 370 because the body door 13 opens the mounting opening 12 to the left.

  In this case, by providing the sub-platforms 330 and 340 on the main platform 320, the platform 300 can be set to the target position even in a place where the target position is deep, such as the loading port 12 on the main wing of the aircraft. As a result, the work space can be further secured by the amount of the sub platforms 330 and 340. In addition, according to such a configuration, it is possible to minimize the sliding operation of the main platform 320 for preventing the interference between the tip of the sub platform 330 and the fuselage door 13, so that loading of luggage or the like at a high place is possible. Work efficiency such as maintenance and maintenance is shortened and work efficiency is improved. In addition, in this case, since the two sub platforms 330 and 340 can be taken in and out separately from the main platform 320, interference between the tip of the sub platform 330 and the body door 13 or the like can be prevented.

  In this embodiment, as shown in FIG. 13, a removable auxiliary plate 390 is bridged between the sub platform 340 and the mounting port 12, but the work is performed without using the auxiliary plate 390. Also good.

  By the way, in this embodiment, in order to bridge the platform 300 to the mounting port 12, the central axis O1 of the sub platform 340 substantially coincides with the central axis O of the mounting port 12 by the actuator 360 as shown in FIG. Position to the position where you want to. Thus, if the sub platform 340 is arranged on the side where the main platform 320 is difficult to slide due to the presence of the main wing 11, the center axis O 1 of the sub platform 340 is at the shortest position from the center axis O of the mounting port 12. . Therefore, when the lateral width W5 of the secondary platform 340 is narrower than the lateral width W4 of the secondary platform 330, the central axis O1 of the secondary platform 240 is slid in the direction of the central axis O of the mounting port 12 even when the main platform 320 is difficult to slide. As a result, the amount of sliding of the main platform 320 can be minimized, so that the work time for loading and maintenance of luggage or the like at a high place is shortened and the work efficiency is improved.

  FIG. 14 is a main part top view showing a state where the sub platforms 330 and 340 and the auxiliary platform 350 are bridged over the loading port 15 where there is no obstacle such as the main wing 11. In this case, since the door 16 of the loading port 15 is opened to the right, the main platform 320 may be slid to the left and the sub platform 340 may be aligned with the loading port 15. According to this, the following operations are performed so that the work space becomes as uniform as possible.

  First, when working using a lift truck, it is easy to mount the platform 300 on the mounting port 15 when the axle Ov is moved along the central axis O of the mounting port 15, but the width of the sub platform 330 is smaller than that of the sub platform 340. If it is wider, the center axis O2 of the sub-platform 330 is located at the shortest position from the center axis O of the mounting port 15 when the axle Ov is made to approach the center axis O of the mounting port 15. Therefore, when the lateral width W5 of the secondary platform 340 is narrower than the lateral width W4 of the secondary platform 330, the central axis O2 of the secondary platform 330 is set to the central axis O of the mounting port 15 even in a state where the main platform 320 can be freely slid. As a result, the amount of sliding of the main platform 320 can be minimized, so that the work time for loading and maintenance of luggage etc. at a high place is shortened and the work efficiency is improved.

  As a modification of the second embodiment, the main platform 320 may be slidably supported along the lateral width only by the overhanging portion 314 without providing the slit 311 in the fixed platform 310.

  FIG. 15 is a third embodiment that embodies the above idea, in which the main platform 320 is slid to the left with respect to the fixed platform 310 and the sub platforms 330 and 340 and the auxiliary platform 350 are pulled forward from the main platform 320. It is a principal part top view which shows the state. In addition, in this embodiment, the same part as FIGS. 1-14 has the same code | symbol, and abbreviate | omits the description.

In this embodiment, a guide rail 316 is provided on the front surface 310t of the fixed platform 310 in place of the slit 211 , and a plurality of rollers are provided on the rear surface of the main portion 321 without providing the protruding portion 322 on the rear surface of the main platform 320. 324 is provided directly. That is, in this embodiment, the fixed platform 310 supports the main portion 321 of the main platform 320 with the roller 315 provided at the tip 314t of the overhang portion 314, and is provided on the main portion 321 of the main platform 320 with the guide rail 316. The roller 324 is supported. Thereby, the fixed platform 310 supports the main platform 320 so as to be slidable along the lateral width thereof.

  Also in this case, the platforms 310 and 320 are connected to each other by the actuator 360 disposed on the overhanging portion 314, and the overhanging portion 314 is provided below the front surface 310t of the fixed platform 310. In order to support the main platform 320 having the floor surface 321f that coincides with the floor surface 310f of the fixed platform 310, even if the floor surface 321f of the main platform 320 is secured equal to or wider than the lateral width of the fixed platform 310, The main platform 320 can be slid. Therefore, also in this embodiment, a wide work space can be secured while maintaining the function of sliding the main platform 320 relative to the fixed platform 310. The guide rail 316 and the roller 324 may be provided with a roller on the front surface 310t of the fixed platform and a guide rail that supports the roller on the rear surface of the main part of the main platform 320.

The above description is merely an example of the present invention, and various modifications can be made. For example, in the above-described embodiment, the work table is a box-type cargo bed on which the in- flight meal is mounted, but it may be a flat work table used for maintenance of the airframe.

  In addition, the platform is not limited to one in which a plurality of platforms slide with respect to each other as in the above-described form, and the platform slides directly with respect to the box-type cargo bed 140 or does not slide directly fixed to the box-type cargo bed 140. Also good. In such a case as well, as in each of the above embodiments, it is only necessary to cut at least one of the portions forming the tip corner as a platform to provide a defective portion, and the defective platform may be provided with an auxiliary platform. The auxiliary platform is not limited to being manually pulled out and stowed in the same manner as in the above embodiments, and may be pulled out and stowed by an actuator provided between the auxiliary platform and the platform. Further, the shape of the defect portion is not limited to the linear shape obtained by obliquely cutting the tip corner portion of the platform as in the above-described embodiment, and may be a curved shape as long as the tip corner portion does not get in the way.

1 is a side view showing a lift truck that is a form of the present invention and has a box-type cargo bed that is used in an airport or the like and carries an in-flight meal or the like in an aircraft. (A) to (c) are states in which the platform is placed on a gantry and is in a neutral position in which each platform is stored, a state in which a sub platform described below is pulled forward from a main platform described below, and a sub platform It is a top view which shows the state which pulled out the below-mentioned auxiliary platform from the front. (A), (b) is a principal part top view explaining the front-end | tip structure of a main platform and a subplatform, respectively. In the same form, it is a principal part top view which shows the state which stopped the lift truck near the body. In the same form, it is a side view which shows a lift truck with a body and a main wing. In the same form, it is a principal part top view which shows the operation | work state which extends a platform from a lift truck and mounts a load etc. (A) and (b) are other forms for taking in and out the auxiliary platform, respectively, in a state where the platform is placed on a gantry and is in a neutral position in which each platform is stored, and forward from the main platform. FIG. 6 is a top view showing a state in which the auxiliary platform 230 is further pulled forward from the sub-platform pulled out to the front. (A), (b) is the state which is in the neutral position in which the platform which is the 2nd form of this invention was mounted in the mount frame, respectively, and each platform was accommodated, and its side view. In the same form, it is a principal part top view which shows the state which slid the main platform to the left side with respect to the fixed platform. In the same form, it is a principal part top view which shows the state which pulled out the subplatform and the auxiliary | assistant platform ahead from the main platform slid to the left side. In the same form, it is a principal part top view which shows the state which stopped the lift truck near the body. In the same form, it is a principal part top view which shows the state which spanned the subplatform and the auxiliary | assistant platform in the mounting opening. In the same form, it is a principal part top view which shows the operation | work state which extends a platform from a lift truck and mounts a load etc. In the same form, it is a principal part top view which shows the state which spanned the subplatform and the auxiliary | assistant platform in the mounting port without obstructions, such as a main wing. FIG. 10 is a top view of the main part of the third embodiment of the present invention showing a state in which the main platform is slid to the left with respect to the fixed platform and the sub-platform and the auxiliary platform are pulled forward from the main platform 320

Explanation of symbols

10 Airframe
11 Wings
12 Loading port
13 Door
14 engine
100 lift truck
110 cab
120 chassis
121 chassis frame
130 Pantograph type link mechanism
131 Outer side link
132 Inside Link
140 Box type carrier
160 carrier frame
200 platforms
210 Main platform
211 Tip
212 missing part
220 Secondary platform
221 Tip
222 missing part
230 Auxiliary platform
250 Actuator
260 Gas damper
270 Cam mechanism
271 Lever (follower)
272 Cam Roller
273 blocks (guide section)

Claims (6)

In an aerial work platform comprising a self-propelled chassis having a driver's cab in front, a work platform that can be raised and lowered with respect to the vehicle platform, and a platform that projects from the front of the work platform,
Tip the platform is a flat plate which forms a square with two corners at the tip, together with at least one of these corners is a defect is cut obliquely, are housed overlap on the defect A platform for an aerial work vehicle, characterized in that a flat auxiliary platform having a flat plate is provided on the platform so that the platform can be pulled out and stored along the platform from a defect . The platform for an aerial work vehicle according to claim 1 , wherein an actuator that enables storage and withdrawal of the auxiliary platform is provided between the auxiliary platform and the platform. In an aerial work platform comprising a self-propelled chassis having a driver's cab in front, a work platform that can be raised and lowered with respect to the vehicle platform, and a platform that projects from the front of the work platform,
The platform has a flat main platform having a square shape with two corners at the tip, and a flat plate shape having a square shape with two corners at the tip, which is housed so that the main platform can be pulled out forward. A sub-platform, and at the time of storing the sub-platform, at least one of the two corners forming the tip corner as the platform is cut obliquely to form a defective portion, and is overlapped and stored in the defective portion. A platform platform for an aerial work platform , characterized in that a flat auxiliary platform having a distal end is provided on the sub-platform so that the sub-platform can be pulled out and stored along the sub- platform. In an aerial work platform comprising a self-propelled chassis having a driver's cab in front, a work platform that can be raised and lowered with respect to the vehicle platform, and a platform that projects from the front of the work platform,
The platform has a flat main platform having a square shape with two corners at the tip, and a flat plate shape having a square shape with two corners at the tip, which is housed so that the main platform can be pulled out forward. A first sub-platform, and a flat second sub-platform that is housed so as to be able to be pulled out forward with respect to the main platform and has two corners at the tip, and at least when the sub-platform is stored In this case, at least one of the two corners forming the tip corner as the platform is cut obliquely to form a defective portion , and a flat auxiliary platform having a tip that overlaps and is stored in the defective portion is lost. Provided on the secondary platform where the part is provided Aerial platform, characterized in that to enable Tsu pulled out and housed. Said auxiliary platform and said therebetween in the sub platform, aerial platform according to claim 3 or 4, characterized in that formed by providing an actuator that permits storage and withdrawal of the auxiliary platform. The auxiliary platform includes an urging force generating element that urges the auxiliary platform forward and pushes the auxiliary platform from the auxiliary platform between the auxiliary platform and the auxiliary platform.
The aerial work according to claim 3 or 4 , further comprising interlocking storage means for storing the auxiliary platform in the secondary platform in conjunction with the storage operation of the secondary platform between the main platform and the main platform. Car platform.

Images