JP4794399B2 - Cargo handling vehicle - Google Patents

Description

  The present invention relates to a cargo handling vehicle that transports luggage.

FIG. 13 shows a process of stopping the transport carriage 102 in the vicinity of the furnace port 101 of the heat treatment furnace 100 and allowing the load 1 placed on the transport carriage 102 to enter the heat treatment furnace 100 from the furnace port 101. The luggage 1 has wheels 11, and a rail 3 for guiding the wheels 11 is provided inside the heat treatment furnace 100. Since the height of the rail 3 coincides with the upper surface of the transport carriage 102, when the operator pushes the load 1 in the direction indicated by the arrow A, the wheels 11 roll from the transport carriage 102 toward the rail 3, and the load 1 is heat treated. Move to the inside of the furnace 100. The patent document discloses an apparatus for extruding a load with a fork or an arm.
JP 62-126033 A JP-A-62-290618 JP-A 64-69408

  Since the opening 101 in the height direction of the furnace port 101 of the heat treatment furnace 100 is limited, when the luggage 1 is lifted from the transport carriage 102 by the fork of the cargo handling device, the luggage 1 is heated in the furnace of the heat treatment furnace 100. Cannot enter the mouth 101. For this reason, a fork as shown in Patent Document 1 cannot be used to push the luggage 1 out of the transport carriage 102.

When the apparatus disclosed in Patent Documents 2 and 3 is mounted on the transport carriage 102, the operation stroke required for the arm to push the load 1 from the transport carriage 102 must be ensured. For this reason, there arises a problem that the entire size of the transport carriage 102 is increased by the dimension obtained by adding the operation stroke to the length of the arm. In addition, when the operation of pushing the luggage 1 from the transport carriage 102 or the operation of picking up the luggage 1 placed in the vicinity of the transport carriage 102 to the transport carriage 102 is relied on manually, a large number of operators must be mobilized. since not, it is difficult to these of the work dispense Ku good cleanly.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a small cargo handling vehicle that can push or pull a load horizontally.

The present invention has been made in accordance with the cargo handling vehicles transported by placing the luggage having a side surface and a lower surface undercarriage, put the undercarriage or we push the luggage moving direction crossing the chassis in a horizontal, relative to the chassis Elevating means for elevating and lowering the base member, a middle slider supported by the base member so as to be slidable in the advancing / retreating direction, and being supported by the middle slider so as to be slidable in the advancing / retreating direction. and extruding the slider toward has a slide head which protrudes from the upper surface of the extruded sliders upwardly of the undercarriage to advance the slide head to one of the previous KiSusumu withdrawal direction, or the sliding said the forward and backward direction of the other wherein a first pushing means for retracting the head, the extruded sliders with advancing the middle slider to one of said forward and backward direction with respect to the base member Midorusu Is advanced into one of the forward and backward direction with respect to Ida, or retracting the extrusion slider with retracting into the other of the forward and backward direction said middle slider relative to said base member to said moving direction of the other with respect to the middle slider and a second extruding means for, in the undercarriage, said package is supported in a posture with its side surface thereof to the other of the forward and backward direction, the first extruding means, the said slide head from the side surface of the cargo retracting the advancing and retracting direction of the other, the lifting means, by raising the base member, prior Symbol slide head is raised higher than the bottom surface of the cargo, the first extruding means, the advancing and retracting the slide head In the process of advancing in one direction, the slide head is abutted against the side surface of the load, thereby causing the load to move on the side of the push slider. Extrusion to a position to advance to one of the moving direction than the end, the lifting means, by further increasing the base member, high raised lower surface of the pre-Symbol extruded sliders said package, said second extrusion The means further pushes the load in one of the advancing and retreating directions by advancing the pushing slider in one of the advancing and retracting directions and abutting an end of the extruding slider against a side surface of the load. And

Furthermore, in the cargo handling vehicle according to the present invention, the first pushing means is provided with two driven sprockets spaced apart from each other in the forward / backward direction on the push slider, and the slide head is fixed to the driven sprockets on the way. An endless chain is wound, and the endless chain is caused to travel between the two driven sprockets according to the rotation of the driving sprocket connected to the driving source, thereby moving the slide head forward and backward, and the second driving means includes: A pinion provided on the base member and rotated by a driving source; a rack attached to the middle slider and meshing with the pinion; a tension chain having one end fixed to the base member and the other end fixed to an extrusion slider; and the middle An idle sp that is provided on the slider and is wound around the tension chain. And a socket, the middle slider according the rotation of the pinion by the tension generated in the tension chain when advancing and retracting, and wherein the advancing and retracting the extrusion slider to the middle slider.

Further, in the cargo handling vehicle according to the present invention, the chassis includes a movable rail that guides the luggage in the advancing and retreating direction, and a horizontal posture in which the movable rail extends outward from the chassis, or an inward of the chassis. And a rail driving means that operates to be in a standing posture that moves backward. Furthermore, the cargo handling vehicle according to the present invention is characterized in that a winch for pulling the load is provided on the chassis.

  According to the cargo handling vehicle of the present invention, the first push-out means advances and retreats the slide head while the load is supported on the chassis with the side face directed to the other side of the forward / backward direction (opposite to the pushing direction). Move backward in the other direction. At this time, it is sufficient that the position of the slide head is slightly retracted to the other side in the advancing and retreating direction from the side surface of the luggage. For this reason, for example, even when the chassis is stopped in a narrow passage or when something is approaching the side of the load, there is even a space for the slide head to enter between the side wall of the passage or the load and the side of the load. For example, the operation of the first pushing means to retract the slide head is not hindered. Therefore, the cargo handling vehicle has an advantage that it is possible to carry out the pushing-out of the luggage described below even if there is no wide space on the other side in the forward and backward directions.

  The slide head retracted as described above is raised higher than the lower surface of the load by the lifting means. Subsequently, if the first push-out means advances the slide head in one of the forward and backward directions, the slide head hits the side surface of the load during this process, so that the load is pushed in one of the forward and backward directions as the slide head advances. The The slide head stops when the load is pushed out to a position where the side surface of the load advances to one side in the forward / backward direction slightly from the end of the push slider.

  Further, when the lifting means raises the extrusion slider of the first extrusion means higher than the lower surface of the load, and the second extrusion means advances the extrusion slider in one of the forward and backward directions, the end of the extrusion slider is moved in this process. Since it hits the side of the load, the load is pushed in one of the forward and backward directions as the push slider advances. As a result, the load is pushed further in one of the forward and backward directions than the position where it has already been pushed out by the slide head. For example, when there is a furnace port of the heat treatment furnace in one of the forward and backward directions with respect to the chassis, the load is removed from the furnace of the heat treatment furnace. Can be carried into the back of the mouth. At this time, since the cargo handling vehicle does not perform an operation of lifting the load from the chassis, the load can be made to enter the heat treatment furnace straight even if the opening size in the height direction of the furnace port of the heat treatment furnace is limited.

  Further, if a movable rail for guiding the load in the advancing and retreating direction is provided in the chassis, and the movable rail is in a horizontal posture in which the rail driving means extends outward from the chassis, the first pushing means and the second pushing means may It is possible to guide the load pushed out to the back of the furnace port of the heat treatment furnace. Further, when the cargo handling vehicle travels, the rail driving means erects the movable rail so that the movable rail can be retracted inward of the chassis.

  Moreover, when the winch which pulls a luggage | load is provided in the chassis, the luggage | bag placed in one side of the advancing / retreating direction with respect to a chassis can be picked up to a chassis using a winch. Thereby, the labor of the operator can be greatly reduced from the work of pushing the luggage from the chassis and the work of placing the luggage on the chassis.

  In FIG. 1, a load 1 is transported on a chassis 2, and the luggage 1 is pushed out from the chassis 2, so that the luggage 1 is supported on two rails 3 that can support the wheels 11 of the luggage 1 at the same height as the chassis 2. The cargo handling vehicle 4 which transfers is shown. An arrow A indicates one of the forward and backward directions described below, and an arrow B indicates the other of the forward and backward directions.

  The cargo handling vehicle 4 includes a first pushing means 6 for moving the slide head 5 back and forth in the advancing and retreating direction horizontally across the chassis 2, a second pushing means 8 for moving the pushing slider 7 supporting the first pushing means 6, and a first pushing means 6. Elevating means described later for elevating and lowering the pushing means 6 and the second pushing means 8 with respect to the load 1 is provided. Details will be described in Examples.

  A well-known technique shall be applied to the drive source or guide means described below, and illustration or detailed description of each is omitted. For example, an electric motor such as a motor or a hydraulic cylinder that extends and contracts a piston rod may be applied as a drive source. Further, as a guide means, a sliding treatment in which a slider joined to the slide head 5 or the extrusion slider 7 is engaged with a guide rail or a guide groove may be applied.

  As shown in FIG. 2, the chassis 2 of the cargo handling vehicle 4 has two rails 21 extending in the advancing and retreating directions fixed to the upper surface thereof, and a floor of an automatic warehouse or the like is provided by a plurality of traveling wheels 22 that respectively handle steering and driving. Can run. The interval between the two rails 21 is set equal to the interval between the two rails 3 shown in FIG. FIG. 3 shows a state in which the wheels 11 of the luggage 1 are respectively supported by the two rails 21.

  As shown in FIGS. 2 and 4, the first pushing means 6 moves the slide head 5 forward in one of the advance / retreat directions, or moves the slide head 5 backward in the other of the advance / retreat directions. The slide head 5 only needs to protrude above the chassis 2 from the upper surface of the extrusion slider 7, and the shape thereof is not limited. The second push-out means 8 moves the push-out slider 7 forward in one of the forward and backward directions, or moves the push-out slider 7 backward in the other of the forward and backward directions. The extrusion slider 7 is supported by the middle slider 9 so as to be slidable in the forward / backward direction with its one end 71 directed in one of the forward / backward directions, and the middle slider 9 is slidable in the forward / backward direction by the base member 10. It is supported.

Furthermore, the 1st extrusion means 6 is provided with the 1st drive means 72 accommodated in the extrusion slider 7, as shown in FIG. The first driving means 72 is provided with two driven sprockets 74 that are separated from each other in the vicinity of the one end 71 and the other end 72 of the extrusion slider 7, respectively, and the slide head 5 is placed in the middle of these driven sprockets 74. A fixed endless chain 75 is wound around. Endless chain 75 is wound et al also drive sprocket 76 connected to the drive source. When the endless chain 75 travels between the two driven sprockets 74 according to the rotation of the drive sprocket 76, the slide head 5 moves forward and backward. Reference numeral 77 in FIG. 4 indicates a guide means for guiding the slide head 5 in the forward / backward direction.

  As shown in FIG. 6A, the second pushing means 8 includes a second driving means 82 housed in the middle slider 9. In addition, for the convenience of explanation, only the functioning portions of the base member 10 and the lifting / lowering means 12 are illustrated.

  The second drive means 82 is provided with a pinion 83 that is rotated by a drive source on the base member 10, and a rack 84 that meshes with the pinion 83 is attached to the middle slider 9. Further, the second driving means 82 is arranged in the middle of one tension chain 85 in which one end a is fixed to the base member 10 and the other end b is fixed in the vicinity of the other end 72 of the extrusion slider 7. It is wound around one idle sprocket 86 arranged in the vicinity of 91. When the pinion 83 rotates clockwise in the drawing, the middle slider 9 moves forward in one of the forward and backward directions, and at the same time, tension is generated in one tension chain 85, so that the pushing slider 7 moves forward relative to the middle slider 9. Thereby, the 2nd extrusion means 8 expand | extends as shown in FIG.6 (b).

  Further, as shown in FIG. 7A, another tension chain 87 having one end a fixed to the base member 10 and the other end b fixed to the vicinity of the one end 71 of the extrusion slider 7 is in the middle of the middle slider 9. Is wound around another idle sprocket 88 disposed in the vicinity of the other end portion 92 of the other. When the pinion 83 rotates counterclockwise in the drawing, the middle slider 9 moves backward in the forward / backward direction, and at the same time, tension is generated in the other tension chain 87, so that the pushing slider 7 moves backward with respect to the middle slider 9. . Thereby, the 2nd extrusion means 8 shortens as shown in FIG.7 (b).

  The elevating means 12 includes a hydraulic cylinder 122 that extends and contracts the piston rod 121 in the vertical direction, and a hydraulic unit that is mounted on the chassis 2 and does not appear in the drawing. The hydraulic unit includes a hydraulic pump, a direction switching valve, a tank, a relief valve, and piping. When the flow of hydraulic oil supplied from the hydraulic pump of the hydraulic unit to the hydraulic cylinder 122 is switched by the direction switching valve, the piston rod 121 of the hydraulic cylinder 122 expands and contracts. For example, when the hydraulic cylinder 122 is attached to an appropriate position such as a frame of the chassis 2 and the base member 10 is moved up and down with respect to the chassis 2 according to the expansion and contraction of the piston rod 122, the slide head 5, the extrusion slider 7, And the middle slider 9 moves up and down. Further, guide means for guiding the base member 10 in the vertical direction is attached to an appropriate place such as a frame of the chassis 2.

  Next, the operation of the cargo handling vehicle 4 to transfer the load 1 will be described. FIG. 8A shows that the extrusion slider 7 is waiting at a position indicated by a virtual line in the drawing. The luggage 1 has its wheels 11 supported by rails 21. The first pushing means 6 first moves the slide head 5 back to the other end 72 of the pushing slider 7. At this point, the position of the slide head 5 only needs to be slightly retracted from the side surface of the luggage 1 to the other side in the forward / backward direction. Further, since the slide head 5 does not deviate greatly from the other end 72 of the extrusion slider 7 to the other in the forward / backward direction, for example, the chassis 2 stops in a narrow passage, or some article approaches the side surface of the luggage 1. Even if there is a space for the slide head 5 to enter between the side wall of the passageway or the article and the load 1, the operation of the first pushing means 6 to retract the slide head 5 is not hindered.

  Subsequently, based on the operation of the lifting and lowering means 12, the first pushing means 6 is raised until the slide head 5 becomes higher than the lower surface of the load 1. In this state, when the first push-out means 6 advances the slide head 5 in one of the forward and backward directions, the slide head 5 hits the side surface of the load 1 and the load 1 is moved to the slide head 5 as shown in FIG. Move as you move forward. As shown in FIG. 9A, the slide head 5 stops when the load 1 is moved until the side surface of the load 1 moves forward in one of the advancing and retreating directions slightly from the one end portion 71 of the extrusion slider 7.

As shown in FIG. 9B, the first pushing means 6 moves the slide head 5 backward from the one end portion 71 of the pushing slider 7 to the other end portion 72 again. Then, based on the operation of the lifting / lowering means 12, the second pushing means 8 is raised until the pushing slider 7 becomes higher than the lower surface of the load 1. In this state, the second push-out means 8 advances the push-out slider 7 in one of the forward and backward directions, so that one end 71 of the push-out slider 7 hits the side surface of the load 1 and the load 1 moves as the push-out slider 7 advances. .

  As a result, the load 1 is pushed further in one of the forward and backward directions than the position that has already been moved by the slide head 5. For example, when there is a furnace port of the heat treatment furnace in one of the forward and backward directions with respect to the chassis 2, the luggage 1 pushed out by the extrusion slider 7 is carried into the depth of the furnace port of the heat treatment furnace. Moreover, since the cargo handling vehicle 4 does not perform the operation | movement which lifts the luggage | load 1 from the chassis 2 at all, even if the opening dimension of the height direction of the furnace opening of said heat processing furnace is restricted, the luggage | load 1 is the upper edge of a furnace opening. The baggage 1 can enter the heat treatment furnace straightly.

  When the above operation is completed, as shown in FIG. 2, the second pushing means 8 moves the pushing slider 7 backward, and the cargo handling vehicle 4 can run to another place by driving the running wheels 22. Thereafter, a procedure for carrying the cargo 1 newly placed on the cargo handling vehicle 4 into the heat treatment furnace will be described. That is, when the load 1 ′ shown in FIG. 1 is already placed on the rail 3 as the first piece, when the second piece 1 is transferred to the rail 3, the extrusion shown in FIG. If one end 71 of the slider 7 pushes the second load 1 toward the load 1 ', the first load 1' is pushed by the second load 1 and moves to the back of the heat treatment furnace. . By repeating the procedure described here, the third and subsequent packages 1 can be carried into the heat treatment furnace in the same manner.

  In this way, considering that the plurality of loads 1 are pushed simultaneously by the pusher slider 7, the pusher slider 7 is configured to be driven strongly by the pinion 83 and the rack 84 shown in FIG. Further, the slide head 5 is configured to advance and retreat with the endless chain 75 shown in FIG. 5 because the operation stroke of the slide head 5 is the maximum range extending from one end 71 to the other end 72 of the pusher slider 7. It is for setting to.

  As shown in FIG. 2, the cargo handling vehicle 4 extends the front ends of the two rails 21 in one of the forward and backward directions, which may be an obstacle when the cargo handling vehicle 4 travels. Therefore, in this embodiment, as shown in FIGS. 10 and 11, the two movable rails 13 are respectively attached to the chassis 2 via the hinge pins 23 so that the individual movable rails 13 can turn around the hinge pins 23. . Further, the base end portion of the rail drive means 24 mainly composed of a hydraulic cylinder is pin-joined to a stay 25 raised on the chassis 2, and the tip of the piston rod 26 extending downward from the rail drive means 24 is connected to the movable rail. The joint piece 27 projecting from the side surface of 13 is pin-joined.

  The rail driving means 24 is connected to a hydraulic unit similar to the above. When the flow of hydraulic oil supplied from the hydraulic pump of the hydraulic unit to the rail drive means 24 is switched by the direction switching valve, the piston rod 26 of the rail drive means 24 expands and contracts. When the piston rod 26 extends, the movable rail 13 assumes a horizontal posture extending outward of the chassis 2 as represented by a solid line in FIG. In this state, the movable rail 13 can guide the wheels 11 to the outside of the chassis 2. Further, when the piston rod 26 is shortened, the movable rail 13 is in a standing posture as shown by the phantom line in the drawing and retracts inward of the chassis 2. In this state, the cargo handling vehicle 4 can travel without causing the movable rail 13 to protrude from the chassis 2.

  Further, as shown in FIG. 11, steps 28 and 29 are attached to the mutually facing side surfaces of the two movable rails 13 so that an operator who assists in transferring the load 1 places his / her feet on the steps 28 and 29. May be.

  In addition, as shown in FIG. 12, electric winches 14 and 15 may be provided on both sides of the chassis 2. In this case, the wire 16 drawn out from the electric winch 14 arranged close to the other side in the forward / backward direction is hooked to the luggage 1 placed in one side of the forward / backward direction with respect to the chassis 2. If the wire 16 is wound around the electric winch 14 in this state, the luggage 1 can be pulled to the other side in the forward / backward direction and pulled up to the chassis 2. Alternatively, the wire 17 drawn out from the electric winch 15 arranged close to one side in the forward / backward direction is hooked to the luggage 1 ′ placed on the other side in the forward / backward direction with respect to the chassis 2. If the wire 17 is wound around the electric winch 15 in this state, the load 1 ′ can be pulled in one of the forward and backward directions and pulled up to the chassis 2.

  It should be noted that the present invention can be implemented in variously modified, modified, or modified forms based on the knowledge of those skilled in the art without departing from the spirit of the present invention. For example, the wheel 11 and the rail 21 of the luggage 1 are not essential, and the luggage 1 may be slid on the upper surface of the chassis 2, and the luggage 1 may be slid on the rail 3 or the movable rail 13. Further, a roller or the like for slidably receiving the load 1 may be attached to the rails 3 and 21 or the movable rail 13.

  In the above description, an example in which the luggage 1 is pushed out from the chassis 2 in one of the advancing / retreating directions is shown, but the luggage 1 may be pushed out of the chassis 2 in the other of the advancing / retreating directions. In this case, after the first pushing means 6 advances the slide head 5 to the one end portion 71 of the pushing slider 7, the slide head 5 is moved to the load 1 in the process of moving the slide head 5 backward from this position toward the other side of the advance / retreat direction. By hitting 5, the load 1 is pushed out in the other direction. Further, when the lifting / lowering means 12 raises the extrusion slider 7 to a position higher than the lower surface of the luggage 1 and the second extrusion means 8 moves the extrusion slider 7 backward, the other end 72 of the extrusion slider 7 hits the luggage 1. The baggage 1 can be further pushed out in the other direction.

  The present invention is a technique useful for transporting all kinds of luggage on a chassis and transferring the luggage from the chassis to a predetermined place.

The perspective view which shows the usage example of the cargo handling vehicle which concerns on embodiment of this invention. The top view of the cargo handling vehicle which concerns on Example 1 of this invention. The side view of the cargo handling vehicle which concerns on Example 1 of this invention. The top view of the 1st extrusion means applied to the cargo handling vehicle which concerns on Example 1 of this invention, and a 2nd extrusion means. Schematic which shows the principle of the 1st extrusion means applied to the cargo handling vehicle which concerns on Example 1 of this invention. Schematic which shows the principle which the 2nd extrusion means applied to the cargo handling vehicle which concerns on Example 1 of this invention expands in order of (a), (b). Schematic which shows the principle which the 2nd extrusion means applied to the cargo handling vehicle which concerns on Example 1 of this invention shortens in order of (a), (b). (A) is the schematic which shows the 1st process of the operation | movement which the cargo handling vehicle which concerns on Example 1 of this invention pushes a load, (b) is the schematic which shows the 2nd process. (A) is the schematic which shows the 3rd process of the operation | movement which the cargo handling vehicle which concerns on Example 1 of this invention pushes a load, (b) is the schematic which shows the 4th process. The side view of the principal part of the cargo handling vehicle which concerns on Example 2 of this invention. The top view of the principal part of the cargo handling vehicle which concerns on Example 2 of this invention. The top view which shows the usage example of the cargo handling vehicle which concerns on Example 2 of this invention. The side view which shows the usage example of a conveyance trolley | bogie.

1: Baggage 2: Car chassis 4: Cargo handling vehicle 5: Slide head 6: First pushing means 7: Pushing slider 8: Second pushing means
9: Middle slider
10: Base member 12: Lifting means 13: Movable rail 14, 15: Electric winch 24: Rail driving means
74: driven sprocket
75: Endless chain
76: Drive sprocket
83: Pinion
84: Rack
85, 87: Tension chain
86, 88: Idle sprocket

Claims (4)

Transported put luggage having a side surface and a lower surface chassis, the load a cargo handling vehicle issuing the undercarriage or we push the moving direction crossing the chassis in a horizontal,
Elevating means for elevating the base member relative to the chassis;
A middle slider that is slidably supported by the base member in the advancing and retracting direction;
An extrusion slider supported by the middle slider so as to be slidable in the advancing and retracting direction and having an end directed to one of the advancing and retracting directions;
Has a slide head which protrudes from the upper surface of the extruded sliders upwardly of the undercarriage to advance the slide head to one of the previous KiSusumu withdrawal direction, or the first retracting the slide head said to advance and retreat direction of the other Extrusion means;
The middle slider is moved forward in one of the forward and backward directions with respect to the base member and the pusher slider is advanced in one of the forward and backward directions with respect to the middle slider, or the middle slider is moved with respect to the base member. and a second pushing means for retracting the other of the forward and backward direction said extrusion slider to the middle slider with retracts the forward and backward direction of the other,
The luggage is supported on the chassis in a posture in which a side surface thereof faces the other side in the forward / backward direction,
The first extruding means, than said slide head side of the cargo is retracted to the other of the forward and backward direction, the lifting means, by raising the base member, the pre-Symbol slide head lower surface of the cargo Also raised higher,
The first pushing means abuts the slide head against a side surface of the load in a process of moving the slide head forward in one of the forward and backward directions. Also extrude to a position to advance in one of the forward and backward directions,
The lifting means, wherein by causing the base member further increased, the pre-Symbol extruded slider is raised higher than the bottom surface of the cargo, the second extrusion means, to advance the extrusion slider to one of said forward and backward direction The cargo handling vehicle further pushes the load in one of the advancing and retreating directions by abutting an end of the push slider against a side surface of the load. The first pushing means is provided with two driven sprockets separated from each other in the advancing and retreating direction on the pushing slider, and an endless chain with the slide head fixed on the driven sprocket is wound around the driven sprocket. Is driven between the two driven sprockets according to the rotation of the drive sprocket connected to the drive source, and the slide head is advanced and retracted,
  The second driving means includes a pinion provided on the base member and rotated by a driving source, a rack attached to the middle slider and meshing with the pinion, one end fixed to the base member, and the other end fixed to the extrusion slider. A tension chain provided on the middle slider and an idle sprocket wound around the tension chain, and the tension generated in the tension chain when the middle slider advances and retreats according to the rotation of the pinion. The cargo handling vehicle according to claim 1, wherein the pushing slider is advanced and retracted relative to the middle slider. A movable rail for guiding the luggage in the advancing / retreating direction;
Rail drive means for operating the movable rail so as to be in a horizontal posture extending outward of the chassis or an upright posture retracting inward of the chassis;
The cargo handling vehicle according to claim 1, further comprising:   The cargo handling vehicle according to any one of claims 1 to 3, wherein a winch for towing the load is provided on the chassis.

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