JP2007269440A - Cargo conveying vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cargo conveying vehicle capable of easily and quickly moving a guide rail in a direction crossing to a movement direction of the cargo and further adjusting the position of the guide rail at high accuracy. <P>SOLUTION: The cargo conveying vehicle 1 for conveying the cargo and performing conveying out/in of the cargo is provided with a self-travelable vehicle 2; platforms 6, 7 for moving the cargo; the guide rail 9 provided on the platforms 6, 7 and extending in the movement direction of the cargo; and an actuator for sliding the guide rail 9 in a direction crossing to the movement direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cargo transport vehicle for transporting cargo.

Today, freight transport vehicles are used mainly when air cargo is carried in and out between an aircraft and a cargo trailer.
A cargo transport vehicle generally includes a traveling vehicle and a platform for moving cargo. The platform is provided with a pair of guide rails for preventing the cargo from falling.

Here, the guide rail guides cargo moving on the platform, and aligns the cargo so as to move in a predetermined area on the platform. Therefore, it is necessary to adjust the distance between the guide rails according to the width of the air cargo (container, pallet) and the width of the carry-in / out entrance.
Therefore, according to the width of air cargo, etc., the guide rails are manually replaced with a plurality of sockets provided on the platform, and the distance between the guide rails is adjusted.
However, the current guide rail has a considerable weight and is often provided in plural, which is a heavy burden on the operator and takes time.

In view of this, there has been proposed an arm that includes an arm rotatable around an axis extending in the height direction of the traveling vehicle and a pair of guide rails attached to the tip of the arm (see, for example, Patent Document 1). ). Then, by rotating the arm, the guide rail moves in a direction in which the guide rails approach and separate from each other. Further, when the guide rail is fixed, a pin is inserted into a fixing hole provided in the platform.
JP 62-234799 A

  However, in the thing of patent document 1, since it is necessary to move a guide rail manually, there still exists a problem that a work burden becomes large. Furthermore, since the pin is inserted into the fixing hole, there is a problem that the guide rail cannot be finely positioned. Therefore, when the carry-in entrance is small and fine adjustment of the cargo position is necessary, the carry-in operation becomes difficult.

  The present invention has been devised in view of the above-described conventional circumstances, and the guide rail can be easily and quickly moved in a direction intersecting the cargo movement direction, and the position of the guide rail can be accurately determined. An object of the present invention is to provide a freight transport vehicle capable of positioning a cargo with high accuracy by well adjusting.

In order to solve the above problems, the present invention provides the following means.
A freight transport vehicle according to the present invention is a freight transport vehicle that transports freight and carries in and out the freight, and is a self-propelled vehicle, a platform that is provided in the vehicle and moves the freight, A guide rail provided on the platform and extending in the movement direction of the cargo, and an actuator for sliding the guide rail in a direction intersecting the movement direction.

  In the freight transport vehicle according to the present invention, the actuator is a cylinder.

  Moreover, the cargo transport vehicle according to the present invention is characterized in that the axis of the cylinder is directed in a direction intersecting the moving direction.

  In the freight transport vehicle according to the present invention, the cylinder is a hydraulic cylinder.

  In addition, the freight transport vehicle according to the present invention reduces the friction in a direction intersecting the moving direction between the surface of the platform and the cargo in a region of the platform where the guide rail slides. Means are provided.

  According to the present invention, since the guide rail is slid by the actuator in a direction intersecting the cargo movement direction, the guide rail can be easily and quickly moved, and the position of the guide rail can be adjusted with high accuracy. Thus, the cargo can be positioned with high accuracy.

(Embodiment)
Hereinafter, a freight transport vehicle according to an embodiment of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a freight transport vehicle.
The freight transport vehicle 1 includes a self-propelled vehicle 2 as a main body.
A rectangular plate-shaped front lifting platform (platform) 6 is provided at the front of the vehicle 2. The front lifting platform 6 serves as a conveyance path for moving cargo. The front lifting platform 6 is provided with a lift scissor link 17 that supports the front lifting platform 6. The lift scissor link 17 is connected to a lift cylinder. The front lifting platform 6 can be moved up and down (moved up and down) by the lift scissor link 17 and the lift cylinder.

Further, a pair of guide rails 9 are provided on the front lifting platform 6. The guide rail 9 is for preventing the cargo moving on the front lifting platform 6 from falling, and for guiding the cargo to move in a predetermined region of the front lifting platform 6. is there. These guide rails 9 are provided in the vicinity of both ends in the width direction W of the vehicle 2 as shown in FIG. Further, the guide rail 9 is extended in the depth direction D of the vehicle 2.
The depth direction D is a longitudinal direction of the front lifting platform 6 and is a moving direction in which cargo is moved on the front lifting platform 6. That is, the vehicle 2 moves forward and backward. The width direction W is a short direction of the front lifting platform 6 and is a direction perpendicular to the cargo movement direction.

  A roller 21 extending in the width direction W is provided on the upper surface of the front lifting platform 6. A plurality of rollers 21 are arranged in the depth direction D, and the cargo on the rollers 21 is moved in the depth direction D by rotating these rollers 21.

  The front elevator 6 is provided with a driver seat 5 for driving the vehicle 2. Further, as shown in FIG. 1, a ballast 13 for projecting and retracting the grounding portion 14 is provided at the front portion of the vehicle 2. It comes to support.

A rectangular plate-shaped cargo bed 12 is provided at the rear of the vehicle 2. A rectangular plate-shaped rear lifting platform (platform) 7 is provided on the top of the loading platform 12. The rear lifting platform 7, like the front lifting platform 6, serves as a transport path for moving cargo, and can be moved up and down by a lift scissor link 17 and a lift cylinder 18. ing.
The longitudinal dimension of the rear lifting platform 7 is set to be larger than the longitudinal dimension of the front lifting platform 6. Further, like the front lifting platform 6, the rear lifting platform 7 is provided with a plurality of rollers 21 extending in the width direction W and a pair of guide rails 9 extending in the depth direction D. .
A stabilizer 13 is also provided in the loading platform 12.

Further, as shown in FIG. 2, the front lifting platform 6 and the rear lifting platform 7 in the present embodiment are provided with a plurality of base shaft portions 28 extending in the direction orthogonal to the cargo movement direction, that is, over the entire length in the width direction W. It has been. The lower end portion of the guide rail 9 is engaged with these base shaft portions 28. Thus, the guide rail 9 is supported so as to be slidable in the width direction W.
Further, each guide rail 9 is connected to a hydraulic cylinder (cylinder, actuator) 22 as shown in FIG. The hydraulic cylinder 22 includes a connecting shaft 22a that can protrude and retract from a hollow main body. The connecting shaft 22a is directed in the width direction W. Each guide rail 9 is connected to the tip of each connecting shaft 22a.

A hydraulic pressure adjusting device 24 is connected to each hydraulic cylinder 22 via a pipe line 26. The hydraulic pressure adjusting device 24 can adjust the hydraulic pressure in the hydraulic cylinder 22 by flowing oil in and out.
Under such a configuration, when the hydraulic pressure adjusting device 24 is driven, the hydraulic pressure in the hydraulic cylinder 22 changes due to the inflow and outflow of oil, whereby the guide rails 9 approach each other via the connecting shaft 22a. It slides in the direction of separation (width direction W).

  Further, a plurality of cargo lifting devices (friction reducing means) 29 are provided between the rollers 21 in the depth direction D on the upper surface of the front lifting platform 6. The cargo lifting device 29 is provided in an area where the guide rail 9 slides, that is, between the pair of guide rails 9. Furthermore, a plurality of cargo lifting devices 29 are provided at equal intervals in the width direction W, and are arranged in two rows in the depth direction D. The cargo lifting device 29 is provided with a support portion that can be moved up and down extending in a columnar shape in the height direction of the vehicle 2 and a free roller provided at the upper end of the support portion. The support portion is arranged at a position where the free roller is immersed in the surface of the front lifting platform 6 at the bottom, and at a position where the free roller protrudes upward from the surface of the front lifting platform 6 at the top. It has come to be.

Next, the operation of the cargo transport vehicle 1 in this embodiment will be described.
Here, a case will be described in which an air cargo transported from a cargo trailer is carried into an aircraft. In addition, when carrying out an air cargo from an aircraft, since it is the procedure reverse to the following, the description is abbreviate | omitted. Further, the front lifting platform 6 and the rear lifting platform 7 are arranged at the lowermost part.

First, the vehicle 2 is stopped at a predetermined position of the aircraft that carries the cargo. Then, the ballast 13 is driven to bring the grounding portion 14 into close contact with the ground. Thereby, the vehicle 2 is stably fixed. At this time, the aircraft is stopped in front of the vehicle 2, that is, cargo is carried in toward the front of the vehicle 2.
Next, the front lifting platform 6 is raised so that the floor surface of the front lifting platform 6 is flush with the floor surface of the aircraft entrance / exit.

  Then, the cargo trailer carrying the cargo is stopped behind the vehicle 2 and the cargo is placed on the rear lifting platform 7. And after moving a cargo to the predetermined position of the rear lifting platform 7, the rear lifting platform 7 is raised, and the rear lifting platform 7 and the front lifting platform 6 are arranged flush with each other. Then, the roller 21 is rotated to move the cargo toward the front lifting platform 6. Then, the cargo is stopped above the cargo lifting device 29. As will be described later, the cargo lifting device 29 is driven and the guide rail 9 is moved in the width direction W to position the cargo at a predetermined position. Then, the roller 21 is rotated, and the cargo is carried in from the carry-in / out entrance of the aircraft.

Here, when the cargo is placed on the front lifting platform 6 and disposed above the cargo lifting device 29, the cargo is positioned as follows.
That is, the cargo lifting device 29 is driven to raise the support portion. At this time, since the cargo B (shown in FIG. 2) is arranged above the cargo lifting device 29, the cargo B is lifted through the free rollers. And if the raise of a support part is stopped in a predetermined position, the bottom face of the cargo B will be separated from the roller 21, and will be in the state which contacted only the free roller.

  Then, the hydraulic pressure adjusting device 24 is driven to move the guide rails 9 toward each other as shown in FIG. Then, one guide rail 9 contacts the cargo B at a certain timing. At this time, the cargo B is supported only by the free rollers, and the friction in the width direction W between the cargo B and the front lifting platform 6 is reduced. Move in the width direction W.

  When the cargo B is disposed up to a predetermined position in the width direction W, the hydraulic pressure adjusting device 24 is turned off and the movement of the guide rail 9 is stopped. As a result, the cargo B is positioned between the pair of guide rails 9 (the position of the cargo B in the width direction W) and is carried into the aircraft as described above.

As described above, according to the freight transport vehicle 1 in the present embodiment, the guide rail 9 is slid in the width direction W by the hydraulic cylinder 22, so that the guide rail 9 can be easily and quickly moved. The position of the rail 9 can be adjusted with high accuracy. For example, the position of the guide rail 9 can be easily adjusted in millimeters.
Further, since the cargo can be moved in the width direction W by sliding the guide rail 9, positioning of the cargo via the guide rail 9 is possible even when the carry-in / out entrance is small and the gap between the cargo is small. Can be carried out with high accuracy, and carry-in / out operations can be performed quickly and easily.
Further, since the connecting shaft 22a of the hydraulic cylinder 22 is oriented in the width direction W, energy loss can be suppressed when the guide rail 9 is moved in the width direction W, and the guide rail 9 is moved efficiently. be able to.

  Further, since the cargo lifting device 29 is provided between the guide rails 9, it is possible to reduce the friction in the width direction W between the cargo and the front lifting platform 6. By sliding, it is possible to easily and accurately position the cargo in the width direction W.

In the present embodiment, the hydraulic cylinder 22 is provided. However, the present invention is not limited to this, and the cylinder type can be changed as appropriate. For example, an air cylinder or an electric cylinder can be used.
Moreover, not only a cylinder but various actuators may be used. For example, a motor or a piezo (piezoelectric element) can be used.

The guide rails 9 may be slid independently of each other or may be slid in synchronization with each other.
A cargo lifting device 29 may be provided on the rear lifting platform 7. Thereby, positioning of cargo can be performed still more easily.
Further, the guide rail 9 of the rear lifting platform 7 may be fixed without being slid, or may be replaceable as in the past. However, it is needless to say that sliding is preferable.

Further, a drive function may be added to the cargo lifting device 29 so that cargo lifting and cargo movement are used in combination.
Furthermore, the cargo lifting device 29 may not be provided. This can save labor.
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 is a side view showing an embodiment of a cargo transport vehicle according to the present invention. It is a top view which shows the cargo conveyance vehicle of FIG. It is explanatory drawing which shows a mode that the guide rail of FIG. 1 is slid.

Explanation of symbols

1 Cargo Carrier 2 Vehicle 6 Front Lift Platform (Platform)
7 Rear lifting platform (platform)
9 Guide rail 22 Hydraulic cylinder (cylinder, actuator)
22a Connecting shaft (shaft)
29 Cargo lifting device (friction reduction means)

Claims (5)

A cargo transport vehicle that transports cargo and carries the cargo in and out,
A self-propelled vehicle,
A platform provided on the vehicle for moving the cargo;
A guide rail provided on the platform and extending in the direction of movement of the cargo;
An cargo transport vehicle comprising: an actuator that slides the guide rail in a direction intersecting the moving direction.   The cargo transport vehicle according to claim 1, wherein the actuator is a cylinder.   The freight transport vehicle according to claim 2, wherein an axis of the cylinder is directed in a direction crossing the moving direction.   4. The cargo transport vehicle according to claim 2, wherein the cylinder is a hydraulic cylinder. Friction reducing means for reducing friction in a direction intersecting the moving direction between the surface of the platform and the cargo is provided in an area of the platform where the guide rail slides. The freight transport vehicle according to claim 1.

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