JP4554945B2 - Aerial work platform - Google Patents

Description

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

  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. In-flight meals are loaded from the workbench close to the loading port.

  However, if the chassis cannot be stopped accurately with respect to the position of the aircraft loading port, a shift occurs between the loading port of the aircraft and the work table, making it difficult to mount in-flight meals and the like. For this reason, conventionally, the work table is held by a work table frame attached to a link mechanism, the work table frame is lifted up to the height of the mounting opening of the machine body, and the entire work table is moved left and right with respect to this work table frame. Thus, the positional deviation between the mounting port and the work table is adjusted (for example, see Patent Document 1).

No. 4-8156

  However, in the above-described conventional technology, for example, when there is even an obstacle on the side of the lifted workbench, if the entire workbench cannot be slid, the positional deviation between the loading port and the workbench is finely adjusted. There was an inconvenience that it was not possible. Even if there is a slight misalignment between the loading port and the workbench, it is necessary to finely adjust the misalignment between the loading port and the workbench by sliding the entire workbench. There was room.

  The problem to be solved by the present invention has been made in view of these facts, and when adjusting the deviation between the target position and the work table in a limited work space at a high place, the small turn is effective and the operability is excellent. It is to provide an aerial work platform.

According to one aspect of the present invention, a self-propelled capable chassis having a cab forward, and a second arm the first arm and the two parallel that two parallel provided on the chassis at the front and rear undercarriage In an aerial work platform including a link mechanism arranged so as to cross and a work table that moves up and down on the chassis by each arm of the link mechanism, the link mechanism penetrates each of the first arms so as to be movable. It has a first shaft that integrally connects the arms and a second shaft that integrally connects the second arms, and the work table has two beams spanning the first and second shafts. while retaining at the platform frame, in the workbench frame, and the bearing portion which swingably fixed held between the beam facing the one end of the first shaft and one end thereof, and the other end to the other end of the first shaft a guide portion for movably supported along the beam for the beam facing A guide portion movably supported along the beam against one end of the second shaft to the beam facing the one end, movable along the beam for the beam facing the other end of the second shaft and the other end The first arm is provided with a first actuator that moves the first axis relative to the first arm and pivots the work table together with the work table frame with respect to the link mechanism. It is characterized by.

  According to a second aspect of the present invention, in the aerial work vehicle according to the first aspect, the link mechanism has a second shaft movably penetrating each of the second arms, and the second arm includes A second actuator is provided for moving the second axis with respect to the second arm and turning the work table with respect to the link mechanism together with the work table frame.

  According to a third aspect of the present invention, in the aerial work vehicle according to the first or second aspect, the other end of the first shaft and the both end portions of the second shaft can each be pivoted with respect to the beam. A support portion that is fixedly held is provided.

  According to a fourth aspect of the present invention, in the aerial work vehicle according to any one of the first to third aspects, at least the other end of the first shaft among the other end of the first shaft and both ends of the second shaft. Is a friction element that slides on the guide portion.

  According to a fifth aspect of the present invention, in the aerial work vehicle according to any one of the first to fourth aspects, the work table is disposed along the beam of the work table frame between the work table and the work table frame. A linear motion mechanism that is movably supported is provided.

According to a sixth aspect of the present invention, in the aerial work vehicle according to any one of the first to fifth aspects, a platform that is movable along the beam is provided on the work platform frame.
Further, according to a seventh aspect of the present invention, in the aerial work vehicle according to any one of the first to sixth aspects, the link mechanism is spanned between two first arms. A pipe member integrally connecting the upper ends of the arms, and the first shaft movably passes through each of the first arms through the pipe member, and is spanned between two second arms. A pipe member integrally connecting the upper ends of the two arms, and the second shaft movably penetrates each of the second arms through the pipe member.

  According to the present invention, when the first axis is moved in the direction in which the worktable is to be turned using the first actuator, the first axis is pushed in the direction in which the worktable frame is to be turned with respect to the link mechanism. The one end of the first shaft is swung with respect to one beam of the work table frame by the support portion, and the other end moves along the guide portion provided on the other beam. And in the 2nd axis | shaft, the both ends move along the guide part provided in the beam facing the edge part. For this reason, the work frame holding the work table can turn with respect to the link mechanism, that is, the chassis, without applying an extra load to the first shaft and the second shaft. In addition, according to the present invention, since one end of the first shaft is fixedly held by the support portion so as to be swingable with respect to the work table frame, the work table is compared with a case where both ends of the first shaft are made free. Positioning of the swivel angle becomes easy.

  Therefore, the present invention makes a small turn when adjusting the deviation between the work table and the target position where the work table is aligned in a limited work space in a high place, such as when there is even an obstacle on the side of the lifted work table. Because it is effective and has excellent operability, the work efficiency of loading and maintenance of luggage etc. at a high place is shortened and work efficiency is improved. In addition, according to the present invention, by synchronizing the expansion and contraction directions of the first and second actuators, the work table can be slid to the left and right with respect to the chassis as in the conventional case.

In the present invention, the link mechanism may be configured such that the second shaft penetrates each of the second arms so that the second arm can move, and the second arm moves the second shaft with respect to the second arm. It is preferable that a second actuator for rotating the work table with respect to the link mechanism together with the frame is provided. In this case, the second shaft pushes the work table frame in the direction in which it wishes to pivot with respect to the link mechanism, but one end of the first shaft is further swung with respect to one beam of the work table frame by the support portion, The other end further moves along the guide provided on the other beam. And also in the 2nd axis | shaft, the both ends move further along the guide part provided in the beam facing the edge part. Thereby, since the 2nd axis | shaft side of a work-table frame can also be made to turn with respect to a chassis, the turning angle required in order to adjust the shift | offset | difference of a target position and a work table can be ensured still more widely.

  In the present invention, it is preferable that a support portion is provided at each of the other end portion of the first shaft and the both end portions of the second shaft so as to fix and hold the end portions with respect to the beam. In this case, since the degree of freedom with respect to the workbench frame of the second axis is increased, a wide turning angle necessary for adjusting the deviation between the target position and the workbench can be secured.

  In the present invention, it is preferable that at least the other end of the first shaft among the other end of the first shaft and the second shaft is a friction element that slides on the guide portion. In this case, since at least the first shaft does not move excessively with respect to the work table frame due to friction with the guide portion, it is easy to position the turning angle of the work table, and the work efficiency is further improved.

  Moreover, in this invention, it is preferable to provide the linear motion mechanism which supports a work table so that a movement along the beam of a work table frame is possible between a work table and a work table frame. In this case, for example, even if the target position is deep and shifted from the work table such as a loading port on the main wing of the aircraft, the work table can be set to the target position.

  Furthermore, in the present invention, it is preferable to provide a platform that can move along the beam on the work table frame. In this case, for example, even if the target position is deeper and shifted from the work table, such as a loading port on the main wing of the aircraft, the work table can be set to the target position.

  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 that is a form of the present invention and has a box-type cargo bed that is used at an airport or the like and carries an in-flight meal or the like in an aircraft. FIG. FIG. 6 is a top view of a principal part showing a case where a mechanism 130 and a loading frame 160 are in a neutral position. 3 and 4 are a front view of the main part showing FIG. 2 from the A direction and a front view of the main part showing FIG. 2 from the B direction.

  As shown in FIG. 1, 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, A box-type cargo bed (work platform) 140 that moves up and down on the chassis 120 by a link mechanism 130 is provided. Stabilizing hydraulic jacks 122 are provided at four positions on the front and rear, left and right of the chassis frame 121 in order to ensure stability against wind pressure when the box-type cargo bed 140 is raised.

  2 to 4, the link mechanism 130 includes two left and right outside links (first arms) 131, two left and right inside links (second arms) 132, and side links 131 and 132. Is configured to include a link shaft 133 that rotatably supports the shaft and a hydraulic lift cylinder 134 (see FIG. 1) attached between the side links 131 and 132.

  As shown in FIGS. 2 and 3, the outside links 131 are integrally connected to each other in the vicinity of their respective ends by pipe members 135 that are open on the left and right sides, and the lower ends thereof are along the chassis frame 121 as shown in FIG. It is supported so that it can move. As shown in FIGS. 2 and 4, the inside link 132 is also integrally connected by a pipe member 136 whose left and right sides are open at the ends of each other, and its lower end is fixed to the chassis frame by a fixed shaft 150 as shown in FIG. 121 is fixed and held so as to be rotatable. If the outside links 131 and the inside links 132 are connected to each other by the pipe members 135 and 136, the rigidity of the entire link mechanism 130 is increased, so that the stability of the box-type bed 140 is improved.

  Inside the pipe member 135, as shown in FIG. 3B showing the XX cross section of FIG. 3A, the front shaft (first shaft) 151 is connected to the pipe member 135 via a cylindrical bearing member 137. A lever 151r provided on the front shaft 151 is exposed from an elongated hole 135n formed near the center of the pipe member 135. 2, the hydraulic actuator (first actuator) 138 that is fixed to the outside link 131 and moves the front shaft 151 along the pipe member 135 is connected to the lever 151r. Further, the pipe member 136 also has a rear shaft (second shaft) 152 along the pipe member 136 via a bearing member 137, as shown in FIG. 4 (b) showing the XX cross section of FIG. 4 (a). The lever 152r provided on the rear shaft 152 is exposed through an elongated hole 136n formed near the center of the pipe member 136. As shown in FIG. 2, a hydraulic actuator (second actuator) 139 that is fixed to the inside link 132 and moves the rear shaft 152 along the pipe member 136 is also connected to the lever 152r.

Further, the front shaft 151 and the rear shaft 152 are respectively spanned between two beams 160a and 160b of a loading platform frame (working platform frame) 160 that holds the box-type loading platform 140. The carrier frame 160 is shown in FIG.
As shown in FIG. 4, a U-shaped rail (guide portion) 161a is integrally provided on a beam 160a facing one end 151a of the front shaft 151 and one end 152a of the rear shaft 152, and the other end 151b of the front shaft 151 and the rear shaft 152 are provided. A U-shaped rail (guide portion) 161b is also integrally provided on the beam 160b facing the other end 152b of the frame. As a result, the load carrier frame 160 integrally connects the end 151a of the front shaft 151 to the rail 161a via the universal bearing (supporting portion) 170, and fixes and holds the end 151a with respect to the beam 160a. In addition, the other end 151b is supported to be movable along the beam 160b via the rail 161b, and the end portions 152a and 152b of the rear shaft 152 are supported to be movable along the beams 160a and 160b via the rails 161a and 161b, respectively. To do.

  In this embodiment, the front shaft 151 is provided with a roller 153 at its end portion 151b, and this roller 153 is fixed and held so as to be swingable via a universal bearing 170, and the rear shaft 152 also has its end portions 152a, 152a, Each of the rollers 152b is provided with rollers 153, and these rollers 153 are fixedly held via a universal bearing 170 so as to be swingable. As a result, the link mechanism 130 moves up and down with the expansion and contraction of the hydraulic lift cylinder 134 while maintaining the box-type cargo bed 140 in a state parallel to the road surface with respect to the chassis 120.

  Further, in this embodiment, as shown in FIG. 3, the cargo bed frame 160 is provided with the same U-shaped rails 162a and 162b in opposite directions to the rails 161a and 161b, and each of these rails 162a and 162b has a universal bearing. A roller 153 fixed and held so as to be swingable through 170 is provided. On the other hand, as shown in FIG. 4, the box-type loading platform 140 also has U-shaped rails 163 a and 163 b at positions facing the rails 162 a and 162 b, respectively. A roller 153 is provided that is movably fixed and held. The box-type carrier 140 and the carrier frame 160 support the respective rollers 153 with rails 162a, 163a and 162b, 163b facing each other, so that the box-type carrier 140 and the carrier frame 160 are between the box-type carrier 140 and the carrier frame 160. Is configured so as to be movable along the beams 160a and 160b of the loading frame 160. The presence or absence of the universal bearing 170 can be arbitrarily changed according to the specification conditions. In this embodiment, each roller 153 may be directly fixed and held by each of the rails 162a, 162b, 163a, and 163b.

  In this embodiment, as shown in FIG. 1, the box-type loading platform 140 has a platform 141 that is extendable in the forward direction of the vehicle in order to load food and luggage on the aircraft. The platform 141 is normally supported in a state of being in contact with a gantry 123 fixed to the chassis frame 121. The platform 141 expands and contracts in the front-rear direction of the vehicle and is supported so as to be able to turn left and right. A shock-absorbing member made of a resin such as rubber is provided at a tip portion 141a of the platform 141. The platform 141 is placed at a predetermined upper position of the cab 110 provided in the chassis 120 when the vehicle travels.

  The box-type loading platform 140 is integrally provided with a guide rail 142 that engages with the platform 141 on the front surface thereof. Since the guide rail 142 moves relative to the platform 141 when the box-type carrier 140 starts to rise, the box-type carrier 140 is raised while maintaining the platform 141 in the predetermined upper position. When the floor surface height of the loading platform 140 coincides with the floor surface height of the platform 141, the platform 141 comes into contact with the lower end portion of the guide rail 142, so that the box-shaped loading platform 140 rises integrally with the platform 141.

  In addition, the front of the box-type loading platform 140 is provided with a double door opening / closing door 143 having two doors on the left and right. These doors 143 are attached to the inner wall of the box-type loading platform 140 via hinges, respectively. It has been. 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 platform 141 and then opens toward the platform 141 on the outside, FIG. As shown in FIG. 3, the platform protection wall is formed by sliding along the platform 141.

  In addition, on the front roof of the box-type cargo bed 140, there is a canopy 144 for rain protection that is stored in the roof during traveling and taken out when necessary, and this canopy 144 is undulated and extended by a hydraulic cylinder (not shown), Improve the work environment in bad weather. Reference numeral 145 denotes a handrail detachably attached to the platform 141 for the safety measures of the worker.

  Next, with reference to FIGS. 5-11, the specific effect | action of this form is demonstrated.

  FIG. 5 is a top view of the main part showing a part of the fuselage 10 and the main wing 11. As shown in this figure, when the mounting port 13 of the fuselage is at the upper part of the main wing 11 and another vehicle 200 is stopped in the vicinity, the platform 141 is pulled out from the box-type carrier 140 in the conventional lift truck. However, it is difficult to join the platform 141 to the airframe 10 almost vertically without shifting from the left and right with respect to the mounting port 13.

On the other hand, 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 13 by following the following procedure.

  FIG. 6 is a side view showing the lift truck 100 of FIG. 5 together with a part of the airframe 10, and FIGS. 7 and 8 each show a case where the cargo bed frame 160 is slightly swung leftward with respect to the link mechanism 130. It is a principal part top view.

  In this embodiment, first, as shown in FIG. 5, after approaching the vicinity of the mounting port 13 of the body 10 and stopping, the hydraulic jack 122 is lowered to stabilize the truck 100. Next, as shown in FIG. 6, the box-type cargo bed 140 is raised by the link mechanism 130 until the floor height thereof coincides with the floor height of the loading port 13, and the platform 141 is moved from the box-type cargo bed 140 toward the body 10. Then, the door 143 is opened to form protective walls 143a to 143c on the platform 141.

  In this embodiment, as shown in FIG. 7, the hydraulic actuator 137 fixed to the outside link 131 is contracted leftward, and the front shaft 151 is moved leftward along the pipe member 135. In this case, the front shaft 151 pushes the loading platform frame 160 leftward with respect to the link mechanism 130, but one end 151a of the front shaft 151 is counterclockwise with respect to one beam 160a of the loading platform frame 160 by the universal bearing 170. While swinging, the other end 151b moves rearward along the rail 161b provided on the other beam 160b. In the rear shaft 152, one end 152a moves forward along the rail 161a provided on the beam 160a, and the other end 152b moves rearward along the rail 161b provided on the beam 160b. For this reason, the loading platform frame 160 slightly turns leftward with respect to the link mechanism 130 without applying an extra load to the front shaft 151 and the rear shaft 152.

  As a result, the box-type loading platform 140 held by the loading platform frame 160 slightly turns leftward toward the mounting port 13 with respect to the chassis 120 as shown in FIG. In the meantime, a passage joining substantially perpendicularly to the body 11 is formed. In addition, according to the present embodiment, since the one end 151a of the front shaft 151 is fixed and held so as to be swingable with respect to the cargo bed frame 160 by the universal bearing 170, both ends 151a and 151b of the front shaft 151 are respectively connected to the beams 160a and 151a. Positioning of the turning angle of the box-type cargo bed 140 is facilitated as compared with the case where the box-type cargo bed 140 is made free along 160b.

  Therefore, in this embodiment, the box type platform 140 (platform 141) and the platform 141 are combined with each other in a limited working space in a high place, such as when there is even a slight obstruction such as the main wing 12 on the side surface of the raised box type platform 140. When adjusting the displacement with the loading port 13, the small turn is effective and the operability is excellent, so that the loading work time of the luggage etc. at a high place is shortened and the work efficiency is improved.

  In this embodiment, as shown in FIG. 8, the hydraulic actuator 138 fixed to the inside link 132 may be extended, and the rear shaft 152 may be moved to the right along the pipe member 136. In this case, the rear shaft 152 pushes the cargo bed frame 160 rightward with respect to the link mechanism 130, but one end 151a of the front shaft 151 is further counterclockwise with respect to one beam 160a of the cargo bed frame 160 by the universal bearing 170. And the other end 151b moves further back along the rail 161b provided on the other beam 160b. In the rear shaft 152, one end 152a moves further forward along the rail 161a provided on the beam 160a, and the other end 152b moves further rearward along the rail 161b provided on the beam 160b. For this reason, as shown in FIG. 8, the loading platform frame 160 further turns slightly to the left with respect to the link mechanism 130 without applying an excessive load to the front shaft 151 and the rear shaft 152.

  As a result, the box-type carrier 140 held by the carrier frame 160 is slightly turned leftward toward the mounting port 13 with respect to the chassis 120, and the airframe is interposed between the box-type carrier 140 and the mounting port 13. A passage joining substantially perpendicular to 11 is formed. In this case, since the rear shaft 152 side of the cargo bed frame 160 can also be swung with respect to the chassis 120, a wider swivel angle necessary for adjusting the displacement between the mounting port 13 and the platform 141 can be secured. .

  Further, the roller 153 may be directly connected to the other end 151b of the front shaft 151 and the both ends 152a and 152b of the rear shaft 152. However, as in this embodiment, the other end 151b of the front shaft 151 and the rear shaft 152 It is preferable that a universal bearing 170 is provided and connected to each of both end portions 152a and 152b. In this case, since the degree of freedom of the rear shaft 152 with respect to the loading platform frame 160 is further increased, a wider swivel angle necessary for adjusting the displacement between the mounting port 13 and the platform 141 can be secured.

  9 is a main part front view showing the case where the hydraulic actuator 137 is extended in the right direction and the carrier frame 160 is slightly swung in the right direction with respect to the link mechanism 130 from the direction A in FIG. FIG. 10 is a main part front view showing the case where the hydraulic actuator 138 is contracted in the left direction and the loading platform frame 160 is slightly swung in the right direction with respect to the link mechanism 130 from the direction B in FIG. As shown in FIGS. 9 and 10, according to this embodiment, by using the hydraulic actuators 137 and 138, as in FIGS. 7 and 8, the box-type loading platform 140 is slightly turned to the right with respect to the chassis 120. Is also possible.

  Furthermore, according to this embodiment, by synchronizing the expansion and contraction directions of the hydraulic actuators 137 and 138, the box-type cargo bed 140 can be slid in the left-right direction with respect to the chassis 120 as in the conventional case. As an example, FIG. 11 shows a case where the hydraulic actuators 137 and 138 are synchronously contracted in the left direction and the cargo bed frame 160 is slid in the left direction with respect to the link mechanism 130. In this case, the box-type loading platform 140 can slide to the left with respect to the chassis 120, and conversely, the hydraulic actuators 137 and 138 are synchronously extended to the right to slide the loading platform frame 160 to the right with respect to the link mechanism 130. By doing so, it can slide to the right with respect to the chassis 120.

  Further, in the present embodiment, as a modification thereof, at least one end 151b of the front shaft 151 out of the one end 151b of the front shaft 151 and the both ends 152a and 152b of the rear shaft 152 is made of gunmetal or the like instead of the roller 153, and the rail 161b The friction element may be a square block or a round block sliding. In this case, at least the front shaft 151 does not move excessively with respect to the cargo bed frame 160 due to friction with the rail 161b, so that the turning angle of the box-type cargo bed 140 can be easily determined, and the work efficiency is further improved.

  Incidentally, in this embodiment, a linear motion mechanism is provided between the box-type carrier 140 and the carrier frame 160 so as to support the box-type carrier 140 movably along the beams 160a and 160b of the carrier frame 160. In this case, as shown in FIG. 5, even if the target position is deeper, such as the loading port 13 on the main wing 12 of the aircraft and the truck 100 is stopped, the box-type carrier 140 is not aligned. If the platform 141 is pulled out from the platform frame 160 and does not reach, the platform 141 can be further pulled out from the box-type platform 140 and set in the loading port 13.

  By the way, in the said form, although the work platform was made into the box-type loading platform which mounts an in-flight meal, it is good also as a flat work table used for maintenance of an airframe.

  FIG. 12 is a schematic diagram showing a case where a lift truck 200 according to another embodiment of the present invention is parked at the lower part of an aircraft engine for maintenance, and FIG. 13 is a schematic view showing FIG. 12 from the upper part. FIG. In the present embodiment, the same parts as those in FIGS.

  As shown in FIG. 12, the truck 200 is composed of a plurality of outside links 131 and inside links 132 in which a pantograph type link mechanism 130 is arranged in parallel on the left and right sides, and the bed frame 160 can be moved up and down by the construction as shown in FIGS. I support it. Therefore, the cargo bed frame 160 can be finely swung in the left-right direction with respect to the link mechanism 130 by the actuators 138 and 139. The work table 240 is held with respect to the cargo bed frame 160 so as to be movable along the frames 160a and 160b by a linear motion mechanism as described in FIGS. A notch 241 is formed.

According to such a configuration, when the work platform 240 lifted to a high place is pulled out from the loading platform frame 160 to the machine body 10 , the work table 240 is turned left and right using the actuators 138 and 139, so that the notch 141 is removed from the machine body. Accurate alignment with respect to 10 . Also in this case, the work time for maintenance at a high place is shortened and the work efficiency is improved.

The above description is only an example of the present invention, and various modifications can be made. For example, in this embodiment, the first arm, the first shaft, and the first actuator are defined as the inside link 132, the rear shaft 152, and the actuator 139, and the second arm, the second shaft, and the second actuator are defined as the outside link. 131, defined as the front shaft 151 and actuator 138, movable support along the other end 152b with swingably secured holds one end 152a of the rear shaft 152 in swivel 170 to the rail 161b, before lateral axis 151 The configurations of the front shaft 151 and the rear shaft 152 may be reversed, for example, by supporting both ends 151a and 151b along the rails 161a and 161b. The support 170 is not limited to a free bearing, and for example, if the front shaft 151 and the rear shaft 152 swing on a plane formed by the loading platform frame 160, the front shaft 151 and the rear shaft 152 are connected to pins or shafts, for example. It may be a structure that is pivotally supported.

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. In the same form, it is a principal part top view which shows the case where a link mechanism and a loading platform frame exist in a neutral position. (A), (b) is the principal part front view which shows FIG. 2 from A direction, respectively, and principal part sectional drawing which shows the XX cross section. (A), (b) is the principal part front view which shows FIG. 2 from the B direction, respectively, and principal part sectional drawing which shows the XX cross section. In the same form, it is a principal part top view which shows a part of airframe and a main wing. It is a side view which shows the lift truck of the same form with a part of airframe. In the same form, it is a principal part top view which shows the case where the front of a loading platform flame | frame is made to carry out a fine turning to the left with respect to a link mechanism. In the same form, it is a principal part top view which shows the case where the front and rear of a loading platform frame are slightly swiveled leftward with respect to the link mechanism. FIG. 3 is a front view of the main part showing from the direction A in FIG. 2 when the hydraulic actuator is extended in the right direction and the carrier frame is slightly swung in the right direction with respect to the link mechanism. FIG. 3 is a front view of the main part showing from the direction B of FIG. 2 when the hydraulic actuator is contracted leftward and the carrier frame is slightly turned rightward with respect to the link mechanism in the same form. In the same form, it is a principal part top view which shows the case where a hydraulic actuator is shrink | contracted synchronously in the left direction, and the loading platform frame is slid to the left with respect to a link mechanism. It is a schematic diagram which shows the case where the lift truck which is the other form of this invention stops at the engine lower part of an aircraft, and is maintained from the side of a truck. It is a principal part top view which shows FIG. 12 from the upper part.

Explanation of symbols

10 Airframe
11 Wings
13 Loading port
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
141 platform
143 door
144 Canopy
151 Front shaft
152 Rear shaft
160 carrier frame
160a, 160b beam
161a, 161b rail
162a, 162b rail
163a, 163b rail
170 Universal bearing
200 lift truck
240 workbench

Claims (7)

A self-propelled chassis having a driver's cab in front, and a link mechanism provided on the chassis and arranged so that two parallel first arms and two parallel second arms intersect at the front and rear of the chassis In an aerial work vehicle including a work table that moves up and down on the vehicle platform by each arm of the link mechanism,
The link mechanism has a first shaft that movably penetrates the first arms and integrally connects the arms, and a second shaft that integrally connects the second arms.
While holding the work table with a work table frame having two beams extending in the front-rear direction of the chassis and spanning the first axis and the second axis,
This workbench frame, one end of the first shaft and the bearing portion which swingably fixed held between the beam facing the one end, to the beam for the beam facing the other end of the first shaft and the other end facing a guide portion for movably supported along a guide portion for an end of the second shaft to the beam facing the one end movably supported along the beam, and the other end to the other end of the second shaft and a guide portion for movably supported along the beam provided for the beam,
The first arm is provided with a first actuator that moves the first axis with respect to the first arm to pivot the work table with respect to the link mechanism together with the work table frame. Work vehicle.   In the link mechanism, the second shaft penetrates each of the second arms so that the second arm can move, and the second arm moves to the second arm with respect to the second arm so that the work table and the work table frame are moved. The aerial work vehicle according to claim 1, further comprising a second actuator for turning the link mechanism.   The aerial work vehicle according to claim 1 or 2, wherein a support portion is provided at each of the other end of the first shaft and both ends of the second shaft so as to fix and hold the end portions with respect to the beam.   The aerial work vehicle according to any one of claims 1 to 3, wherein, of the other end of the first shaft and the both ends of the second shaft, at least the other end of the first shaft serves as a friction element that slides on the guide portion. .   The work at a high place according to any one of claims 1 to 4, wherein a linear motion mechanism is provided between the work table and the work table frame to support the work table so as to be movable along a beam of the work table frame. car.   The aerial work vehicle according to any one of claims 1 to 5, wherein a platform that is movable along the beam is provided on the work table frame. The link mechanism has a pipe member that is spanned between two first arms and integrally connects the upper ends of the first arms, and the first shaft moves through each of the first arms through the pipe member. While penetrating possible,
A pipe member that is spanned between two second arms and integrally connects the upper ends of the second arms, and the second shaft movably penetrates each of the second arms through the pipe member. Item 7. The aerial work vehicle according to any one of Items 1 to 6.

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