JP4291121B2 - Luggage loading / unloading device - Google Patents

Description

  The present invention relates to a baggage loading / unloading device for loading / unloading a baggage into / from a cargo bed, and is provided, for example, in a cargo vehicle cargo bed, and is used for loading / unloading cargo into / from the cargo bed.

  Conventionally, upper transfer means are provided in the front-rear direction along the ceiling of the cargo bed, and intermediate transfer means are provided in the front-rear direction of the middle stage of the load bed, and the pallet table is carried out between the upper transfer means and the middle transfer means. There is provided a baggage loading / unloading device for loading / unloading a baggage with respect to a middle transfer means while performing loading (for example, refer to Patent Document 1).

  Specifically, the upper transfer means is configured such that a plurality of pallet stands can be stored in a line in the front and rear, and the pallet stand located at the rear is transported to the rear end on the middle transfer means side and is placed on the pallet stand. Place the luggage. Subsequently, after moving the pallet stand on which the load is placed on the middle transfer means by one sheet forward, the pallet stand is similarly transported from the upper transfer means to the end of the middle transfer means to place the load. Put. By sequentially repeating this operation, the load is loaded onto the middle stage transfer means while being placed on the pallet.

Further, when unloading the load, the load on the pallet table at the end of the middle transfer means is unloaded and the pallet table is transported to the upper transfer means side. Thereafter, the next pallet stage is moved backward by one sheet in the middle stage transfer means and arranged at the rearmost position, the cargo on the pallet stage is unloaded, and the pallet stage is similarly transported to the upper stage transfer means side. . By sequentially repeating this operation, the load is unloaded from the middle transfer means.
Japanese Patent Laid-Open No. 2000-219078

  However, in the conventional baggage loading / unloading apparatus, the structure of the transport mechanism for transporting the pallet table between the upper transport unit and the middle transport unit is complicated, and in particular, the pallet table is transported from the upper transport unit to the middle transport unit. In this case, since it is necessary to move the entire pallet table on the upper transfer means side to the middle transfer means side, there is a problem that it takes time and the workability is poor.

  In addition, since the structure of the transport mechanism is complicated, this causes a failure, and the pallet base itself is deformed into a shape along the transfer path in order to smoothly transport the pallet base between them. The structure of the stand was also complicated.

  By the way, the operation control of the load carrying-in / out device is performed based on the detection results from the detection devices such as the limit switch and various sensors by the control device in accordance with the operation signal from the operation device. For this reason, when the detection device fails or when the wiring that electrically connects the detection device and the control device is cut, the operation control of the load / unload device by the control device is performed even if the operation is performed by the operation device. May not be possible.

  In this way, if the operation control of the baggage loading / unloading device becomes impossible, when the baggage is loaded on the middle transfer means, the baggage cannot be removed from the middle transfer means until the repair of the failure is completed. It will cause a big trouble.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to enable the loading / unloading of the luggage by a simple mechanism and the operation of the luggage loading / unloading apparatus due to a failure caused by the detection device. It is an object of the present invention to provide a load / unload apparatus capable of at least unloading even when control becomes impossible.

In order to achieve the above-described object, the cargo loading / unloading device according to the first aspect of the present invention is provided at the front and rear along the ceiling of the cargo bed, and stores a plurality of pallet stands, and these pallet stands in the front-rear direction An upper transfer means that can be transferred, and a middle transfer means that is provided at a substantially intermediate portion in the vertical direction of the loading platform, and on which the plurality of pallet stands are mounted, and in which these pallet stands can be transferred in the front-rear direction; A pallet table can be carried in and out of the upper transfer means or the intermediate transfer means through an elevator provided at the rear end of the loading platform and freely movable up and down between the upper transfer means and the intermediate transfer means. and a cargo loading and unloading device provided with a lifting means, with the lifting platform is in the lift of the lifting means prohibits the operation of the upper transport means and middle transfer means, the upper transport means and medium In under the control of the control unit during operation for prohibiting the operation of the lifting platform of the lift means transporting means, with the load on the middle stage transport means is loaded, the operation to unload the cargo from the middle stage transport means Equipped with emergency transport means that enables operation of the upper stage transfer means, middle stage transfer means and lift means to enable unloading operation from the middle stage transfer means when the unloading operation cannot be performed despite this. It is.

  According to the cargo loading / unloading device of the present invention, the loading / unloading of the cargo can be smoothly performed through the pallet table by a simple mechanism by loading / unloading the pallet table between the upper transfer means and the middle transfer means by the lift means. be able to.

  In addition, even if the detection device fails or the wiring that electrically connects the detection device and the control device is cut off, the operation of the upper transfer means, the intermediate transfer means, and the lift means can be performed by the emergency transfer means. As a result, it is possible to unload the baggage using the baggage loading / unloading device, so that a quick response can be made and the obstacles to work can be minimized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic configuration of a load carrying in / out apparatus according to the present invention.

  In FIG. 1, reference numeral 1 denotes a loading platform mounted on a vehicle or the like, and a loading / unloading device 2 is provided on the loading platform 1.

  The load / unload device 2 includes an upper transfer means 3, an intermediate transfer means 4, and a lift means 5.

  The upper transfer means 3 includes a pair of left and right upper guide rails 31 horizontally disposed in the front-rear direction from the front end to the rear end on both the left and right sides of the upper stage along the ceiling of the loading platform 1 and the upper guide rails 31 below the left and right sides. A pair of left and right upper drive chains 32 provided in the front-rear direction and a plurality of claw members 33 provided on the upper drive chains 32 are provided.

  The upper guide rail 31 is for guiding a plurality of guide rollers 61 provided on the left and right sides of each pallet table 6 described later, and each pallet table 6 extends along the upper guide rail 31 via the guide rollers 61. To move back and forth.

  As shown in FIG. 2, the pallet base 6 is formed in a rectangular shape in which the width of the main body 6a corresponds to the width of the cargo bed 1, and four guide rollers 61 are provided on each of the left and right sides. Thus, it can roll in the upper guide rail 31.

  The pallet table 6 is stored by arranging, for example, a total of seven sheets in a row along the front and rear of the upper guide rail 31 on the upper stage of the loading platform 1.

  The upper drive chain 32 includes a pair of left and right front sprockets 34 provided at the front end of the loading platform 1, and a pair of left and right rear sprockets 35 provided approximately one sheet before the pallet platform 6 from the rear end of the loading platform 1. The guide rollers 61 of the pallet table 6 are supported by the left and right upper drive chains 32.

  The left and right front sprockets 34 are integrally provided at both ends of a drive shaft (not shown) pivotally supported in the lateral width direction of the front end of the loading platform 1. The left and right rear sprockets 35 are individually supported by support shafts 36 provided on the left and right sides of the rear end portion of the loading platform 1, respectively.

  Accordingly, the drive motor 37 linked to the drive shaft is rotationally driven in the forward and reverse directions by the drive motor 37 so that the left and right upper drive chains 32 are circulated in the forward and reverse directions while being synchronized.

  The support shaft 36 is configured to be movable back and forth by adjusting means (not shown), and the tension of the upper drive chain 32 can be adjusted by moving the support shaft 36 back and forth.

  The claw member 33 abuts on the guide roller 61 of the pallet table 6 in accordance with the circulation drive of the upper drive chain 32 and moves the pallet table 6 in the front-rear direction. The upper drive chain 32 protrudes at predetermined intervals so as to be inserted between the rollers 61 from below.

  The spacing between the claw members 33 is such that each pallet table 6 can move smoothly in the front-rear direction and each pallet table 6 can be smoothly transferred to and from the lift means 5 described later. It is set corresponding to the interval between the rollers 61.

  The middle stage transfer means 4 includes a pair of left and right middle guide rails 41 horizontally disposed in the front-rear direction from the front end to the rear end on both the left and right sides of the middle stage in the vertical direction of the loading platform 1, and the middle stage guide rails 41 on both the left and right sides. A pair of left and right middle drive chains 42 provided in the front-rear direction and a plurality of claw members 43 provided in the middle drive chain 42 are provided, and basically configured in the same manner as the upper transfer means 3. Yes.

  Specifically, the middle stage guide rail 41 is configured such that the guide rollers 61 of the pallet bases 6 can roll, and the pallet bases 6 can be moved back and forth along the middle stage guide rails 41 via the guide rollers 61. Moving.

  When all the pallet tables 6 are arranged in the middle stage of the loading platform 1 as shown in FIG. 2 along the middle guide rail 41, these pallet platforms 6 are arranged in a line from the front end to the rear end portion of the loading platform 1. It arrange | positions and it is made to divide the inside of the loading platform 1 up and down.

  The middle stage drive chain 42 is connected to a pair of left and right front sprockets 44 provided at the front end of the loading platform 1 and a pair of left and right rear sprockets 45 provided approximately one piece before the pallet platform 6 from the rear end of the loading platform 1. Each is wound.

  As shown in FIG. 2, the left and right front sprockets 44 are integrally provided at both ends of a drive shaft 46 that is pivotally supported in the width direction of the front end of the loading platform 1. The left and right rear sprockets 45 are individually supported by support shafts 47 provided on the left and right sides of the rear end portion of the loading platform 1, respectively.

  The drive shaft 46 is rotationally driven by a drive motor 48 connected to the drive shaft 46, whereby the left and right middle drive chains 42 are circulated in the forward and reverse directions while being synchronized.

  The support shaft 47 is configured to be movable back and forth by adjusting means (not shown), and the tension of the intermediate drive chain 42 can be adjusted by moving the support shaft 47 back and forth.

  The claw member 43 abuts on the guide roller 61 of the pallet table 6 in accordance with the circulation drive of the middle drive chain 42 and moves the pallet table 6 in the front-rear direction. Similar to 33, the intermediate drive chain 42 protrudes from the guide roller 61 adjacent to the pallet base 6 at a predetermined interval so as to be inserted from above.

  The lift means 5 includes an elevating platform 52 disposed so as to be movable up and down along a support column 51 erected along both sides of the rear end of the loading platform 1, and a driving unit 53.

  The lifting platform 52 has an upper surface formed on the mounting surface 52 a on which the single pallet table 6 described above is mounted, and is disposed across the width direction of the loading platform 1. Sliders 54 are provided on both sides of the lifting platform 52, and the sliders 54 are provided so as to be movable up and down along the support columns 51. Also, the left and right sliders 54 are provided with a plurality of rollers 54 a that roll up and down in the column 51, and the lifting platform 52 can be smoothly moved up and down along the column 1 by these rollers 54 a. ing.

  The driving means 53 includes a pair of left and right lifting cylinders 55 and two left and right wires 56 disposed across the lifting cylinders 55 and the sliders 54. That is, the drive means 53 is provided in a pair on the left and right sides corresponding to the left and right sliders 54. Here, one drive means 53 will be described, and description of the other drive means 53 will be omitted.

  Specifically, the elevating cylinder 55 is arranged in the front-rear direction on the bottom surface of the rear end portion of the loading platform 1 with the rod end facing backward, and a pulley 55a is provided at the rod end.

  One end of the wire 56 is fixed to the slider 54, and the middle part is folded downward by a pulley 51 a provided at the upper end of the support column 51 and led to a pulley 51 b provided below the support column 51. It is guided forward by a pulley 51b, folded back by a pulley 55a of an elevating cylinder 55, and fixed to the loading platform 1 side.

  Accordingly, each telescopic cylinder 55 is retracted and each wire 56 is pulled toward the telescopic cylinder 55 to raise the lifting platform 52 along the column 51 via each slider 54, and conversely, each telescopic cylinder 55 is extended. Then, the lifting platform 52 can be lowered along the column 51 via each slider 54 by feeding each wire 56 from the telescopic cylinder 55 side to the column 1 side.

  The elevating platform 52 that performs the elevating operation in this way is the pallet platform between the upper position indicated by the solid line in FIG. 1 where the pallet platform 6 is carried in and out with the upper transport means 3 and the middle transport means 4. 6 is carried out at the middle position shown by a two-dot chain line in FIG. 1 and at the lower stage position shown by a one-dot chain line in FIG.

  Here, the positioning of the lifting platform 52 at each of the above positions is performed based on the amount of expansion / contraction of the lifting cylinder 55 as shown in FIG. Specifically, two detection devices 57 and 58 for detecting the expansion / contraction state of the lift cylinder 55 are provided on the lift cylinder 55 side. One detection device 57 detects that the elevating cylinder 55 has reached a predetermined retracted position, and stops the elevating operation of the elevating platform 52 by stopping the retracting operation of the elevating cylinder 55 based on the detection result. Stop and stop at the upper position. The other detection device 58 detects that the elevating cylinder 55 has reached a predetermined expansion / contraction position, and the elevating operation of the elevating platform 52 is stopped by stopping the elongating operation of the elevating cylinder 55 based on the detection result. Is stopped at the middle position. As the detection devices 57 and 58, limit switches, proximity sensors, and the like are used. The stop at the lower position is when the elevating cylinder 55 is most extended, and the elevating platform 52 is stopped at the lower position by the elongating operation of the elevating cylinder 55 itself.

Further, the lifting platform 52 is provided with lift-side transfer means (not shown) facing the mounting surface 52a. Lift side transfer means is intended for transferring the pallet stand 6 between the upper transport means 3 or the middle transfer means 4 described above, those not correspond to the guide rails, basically upper Similar to the transfer means 3, a drive chain that circulates and a claw member are provided. That is, the length of the drive chain has a length corresponding to the front-rear length of the mounting surface 52a, and the claw member smoothly moves the pallet base 6 in the front-rear direction similarly to the interval between the claw members 33, And it is set corresponding to the interval between the guide rollers 61 of the pallet table 6 so that the delivery of the pallet table 6 can be smoothly performed by the operation described later.

  Further, an appropriate bottom transfer means such as a belt conveyor or a roller conveyor may be provided on the bottom surface of the loading platform 1, or directly on the bottom surface of the loading platform 1 without providing such a bottom transfer device. You may make it load a load.

  Next, the operation of the baggage carry-in / out device configured as described above will be described.

  First, when loading a load onto the bottom surface of the loading platform 1 without using the loading / unloading device 2, each pallet table 6 is stored in a row in the front-rear direction on the ceiling of the loading platform 1 as an upper stage. .

  Next, the operation in the case of loading a package onto the pallet table 6 arranged in the middle stage by the package loading / unloading device 2 will be described.

  First, the upper drive chain 32 is driven to circulate in the direction of the arrow P, and a predetermined pawl member 33 is brought into contact with the guide roller 61 of the pallet table 6 stored in the upper stage, so that the entire plurality of pallet tables 6 are moved backward. The pallet table 6 located at the rearmost position is transported onto the placement surface 52 a of the lifting platform 52. At this time, the lift side transfer means of the lift 52 is also driven in synchronism with the upper transfer means 3 at a predetermined timing, and the pallet table 6 is pulled onto the placement surface 52a by the claw member. When the pallet table 6 is transported to a predetermined intermediate position on the lift 52, the upper transfer means 3 is stopped, and thereafter, the pallet table 6 is transferred by the lift-side transfer means of the lift 52, and the lift If it is arranged at a predetermined position on 52, the lift-side transfer means is stopped by detection by a detection device such as a limit switch (not shown). Thereby, the delivery of the pallet table 6 from the upper transfer means 3 to the lifting platform 52 is completed.

  Subsequently, the lifting cylinder 55 is extended to lower the lifting platform 52 along the support column 51 from the upper position to the lower position. At this time, the elevator 52 is temporarily stopped by the detection of the detection device 58 when it reaches the middle position, and is lowered to the lower position by performing the lowering operation again. In this state, the cargo is loaded by placing the cargo on the pallet table 6 using, for example, a forklift through the rear end opening of the cargo bed 1. In the case of using a forklift, since the pallet is generally lifted by a forklift while the load is placed on an existing pallet, the load is placed on the pallet table 6 via the existing pallet. Will be.

  When the load is placed on the pallet table 6 in this manner, the lifting cylinder 55 is retracted to place the lifting table 52 from the lower position to the middle position. As a result, the pallet table 6 on the lifting platform 52 is arranged at a height that matches the guide rail 41 of the intermediate transfer means 4.

  Next, the lift side transfer means of the lifting platform 52 is driven to convey the pallet table 6 along with the load to the intermediate transfer means 4 side, and the intermediate transfer means 4 is also synchronized with the lift side transfer means at a predetermined timing. By driving in the R direction, the claw member 43 is brought into contact with the guide roller 61 of the pallet table 6, and the pallet table 6 is transported from the lifting table 52 side to the rear end of the intermediate transfer means 4.

  If the pallet table 6 is transported together with the cargo to the rearmost part of the middle stage transfer means 4, the lift stage 52 is raised to the upper stage position, and the rearmost pallet stage 6 is lifted and lowered from the upper stage transfer means 3 in the same manner as described above. After being transported onto the table 52, the baggage is lowered again to the lower position and placed on the pallet table 6.

  Then, the lifting platform 52 is raised and placed again at the middle position, and the pallet table 6 is transported to the rear end of the middle transportation means 4 together with the load in the same manner as described above. That is, the middle stage transfer means 4 transfers the pallet table 6 forward one by one.

  By sequentially repeating such operations, the pallet table 6 stored in the upper stage is sequentially transferred in a state where the load is placed on the intermediate transfer means 4, and the load can be loaded on the entire intermediate transfer means 4.

  In addition, when all six pallets are arranged in the middle stage transfer means 4, the foremost pallet stage 6 is detected by a detection device such as a limit switch (not shown) provided at the front end of the middle stage transfer means 4. Thereafter, the conveyance of the pallet table 6 to the front by the middle stage transfer means 4 is stopped, thereby preventing damage to each device and burning of the drive motor.

  Next, when unloading the loaded cargo, the operation opposite to that described above may be performed. That is, the pallet table 6 arranged at the rearmost of the middle transfer means 4 is transported onto the lift table 52 with the lift table 52 placed at the middle position, and lowered to the lower position, and the pallet table 6 is lowered at this position. Take it down from the top.

  Then, the lifting platform 52 is raised to the upper position, and the empty pallet table 6 is transported from the lifting platform 52 to the end of the upper transport means 3. When the elevator 52 is raised from the lower position to the upper position, the elevator 52 is temporarily stopped by the detection of the detection device 58 when it reaches the middle position, and is raised again to the upper position. Will rise.

  By sequentially repeating this operation, the empty pallet table 6 can be sequentially stored in the upper transfer means 3 while the loads of the intermediate transfer means 4 are sequentially lowered.

  The operation of the luggage carry-in / out device described above is performed by a control device (not shown) based on an operation signal from an operation device (not shown) and a detection signal from each detection device.

  The claw members 33 and 43 of the upper transfer means 3 and the middle transfer means 4 are not arranged at appropriate positions, and the pallet table 6 is placed between the upper transfer means 3 and the middle transfer means 4 and the lifting platform 52. If the delivery is performed, all the pallet stands 6 may not be stored well in the upper transfer means 3 and the intermediate transfer means 4. As a countermeasure for avoiding this, markings are provided on the predetermined claw members 33 and 43 of the upper transfer means 3 and the middle transfer means 4, and the claw members 33 and 43 are aligned with the marks on the loading platform 1 while By performing the delivery, the pallet table 6 can be stored in a good state in the upper transfer means 3 and the intermediate transfer means 4.

  By the way, in the load / unload device 2 in which such an operation is performed, the control device prohibits the operation of the upper transfer means 3 and the intermediate transfer means 4 while the elevating platform 52 of the lift means 5 is moving up and down. During the operation of the transfer means 3 and the middle stage transfer means 4, a control for prohibiting the operation of the lifting platform 52 of the lift means 5 is performed.

  Specifically, as shown in FIG. 4, when the main switch for operating the load / unload device 2 is turned on in the operation device, the control device is moving the lifting platform 52 of the lift means 5 in the lifting operation in step S <b> 1. Determine if there is. This determination is made based on the detection signals from the detection devices 57 and 58 described above. That is, when neither of the detection devices 57 and 58 is detected, the lifting / lowering platform 52 of the lift means 5 is in a state of being lifted or stopped at the lower position or not at the upper position and the middle position. In step S2, the operation of the upper transfer means 3 and the middle transfer means 4 is prohibited. Therefore, in this case, even if an operation signal for operating the upper transfer means 3 and the middle transfer means 4 is input from the operating device to the control device, the control apparatus invalidates the operation signal and the upper transfer means 3 and the intermediate transfer. The operation of the means 4 is not performed.

  Next, when the lifting platform 52 of the lifting means 5 is not in the raising / lowering operation, the process proceeds to step S3, where it is determined whether or not the upper transfer means 3 is in operation. 5. Lifting operation of 5 is prohibited. If the upper transfer means 3 is not in operation, it is determined in step S5 whether or not the intermediate transfer means 4 is in operation. If it is in operation, the lifting operation of the lift means 5 is prohibited in step S6.

  That is, one of the detection devices 57 and 58 is detected, and the lifting platform 52 of the lift means 5 is in the upper stage position or the middle stage position, and the upper stage transfer means 3 or the middle stage transfer means 4 is activated by an operation signal from the operation device. When in operation, even if an operation signal for raising / lowering the lift means 5 is input from the operating device to the control device, the control device does not make the operation signal invalid and does not raise / lower the lift means 5. .

  In this way, by controlling each operation of the upper transfer means 3, the intermediate transfer means 4 and the lift means 5, the load and the pallet table 6 are dropped, the peripheral members are damaged due to the fall, and the operator is injured. Accidents such as can be reliably prevented, and high safety can be ensured.

  For example, if the lifting / lowering platform 52 of the lifting means 5 is not in the middle position, but the middle transporting means 4 is operated by an erroneous operation to transfer the pallet table 6 to the rear of the lifting means 5 side, Although the table 6 and the load are not transported to the lift means 5 and an accident such as dropping occurs, this can be surely prevented.

  Furthermore, the control device that controls the operation of the cargo carry-in / out device 2 as described above is also provided with an emergency transport means. The emergency transport means is for enabling unloading by the baggage loading / unloading device 2 even when the various detection devices fail or when the wiring electrically connecting the detection device and the control device is disconnected. It is.

  By performing the control for prohibiting the operations of the upper transfer means 3, the intermediate transfer means 4 and the lift means 5 as described above, for example, if the detection device 58 is out of order, the lift means 5 in the control device The operation of the intermediate transfer means 4 is disabled because it is determined that it is not located at the position. Therefore, in such a case, it is not possible to unload the load loaded on the intermediate transfer means 4 even if the operation is performed by the operation device.

  In view of this, by providing the emergency transport means, the load loaded on the intermediate transfer means 4 can be unloaded promptly even in such a case.

  Specifically, as shown in FIG. 5, the emergency switch is turned ON in step S11. Thus, the control device operates the upper transfer means 3, the intermediate transfer means 4, and the lift means 5 based on the operation signals from the operation devices, regardless of the detection signals input from the respective detection devices.

  That is, in step S12, it is determined whether or not a forward feed operation has been performed by the operating device. If the feed operation is performed, the upper transfer means 3 and the lift side transfer means of the lift means 5 are the same as described above in step S13. The pallet table 6 can be transferred to the upper transfer means 3 from the lifting table 52 side.

  Similarly, in step S14, it is determined whether or not a backward return operation has been performed by the operating device. If the return operation is performed, the intermediate transfer means 4 and the lift side transfer means of the lift means 5 are set in step S15. The pallet table 6 can be transferred together with the load from the intermediate transfer means 4 to the lift table 52 by operating in the same manner as described above.

  Further, similarly, in step S16, it is determined whether or not the lift operation has been performed by the operating device. If the lift operation is performed, the lift platform 52 of the lift means 5 is moved to the upper platform 52 in the same manner as described above in step S17. It is possible to move up and down between the position, middle position and lower position.

  Then, in step S18, it is determined whether or not the emergency switch is off. If it is not off but remains on, the process returns to step S12 and, as described above, the upper transfer means based on the operation signal from the operating device. 3. The middle stage transfer means 4 and the lift means 5 are actuated urgently to enable the unloading from the middle stage transfer means 4.

  In other words, by enabling each of the operations described above, the pallet table 6 disposed at the rear of the middle transfer means 4 is transported on the lift table 52 to the lower position with the lift table 52 disposed at the middle position. At this position, the load is lowered and the load is lowered from the pallet table 6 to the outside. Then, the lifting platform 52 is raised to the upper position, and the empty pallet table 6 is transported from the lifting platform 52 to the end of the upper transport means 3. By sequentially repeating this operation, the empty pallet table 6 is sequentially stored in the upper transfer means 3 while the loads of the intermediate transfer means 4 are sequentially lowered.

  When the emergency switch is turned off, the emergency operation control of the upper transfer means 3, the intermediate transfer means 4 and the lift means 5 is stopped.

  Thus, even when various detection devices fail, or when the wiring electrically connecting the detection device and the control device is cut off, the unloading device 2 unloads the baggage by the emergency transport means. Therefore, it is possible to respond quickly and minimize the trouble to the work.

  In addition, when the baggage loading / unloading device 2 is operated by the emergency transport means, it is performed by a manual operation of the worker, so that the worker fully recognizes that it is an emergency and avoids an inadvertent misoperation. However, it is necessary to unload carefully.

  The above-described operation control at the time of emergency by the emergency transport means is based on the premise that the drive system such as a drive motor for driving the upper transfer means 3, the intermediate transfer means 4 and the lift means 5 is normal. Needless to say.

It is a side view which shows the structure of a package carrying in / out apparatus. It is a top view which shows the state by which the pallet stand is arrange | positioned at the intermediate | middle stage transfer means. It is an enlarged side view which shows the peripheral part of a raising / lowering cylinder. It is a flowchart figure which shows a part of control content of a package carrying in / out apparatus. It is a flowchart figure which shows the control content of the load carrying in / out apparatus which makes the principal part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 2 Cargo carrying in / out apparatus 3 Upper stage transfer means 4 Middle stage transfer means 5 Lift means 52 Lifting stands 57 and 58 Detection apparatus 6 Pallet stand

Claims (1)

Along with the ceiling part of the loading platform, a plurality of pallet platforms are stored, and upper pallet means that are capable of transporting these pallet platforms in the front-rear direction, provided in a substantially middle part in the vertical direction of the loading platform, The plurality of pallet stands are mounted, and the pallet stands are transportable in the front-rear direction, provided at the rear end of the loading platform, and at least between the upper-stage transport means and the middle-stage transport means. in a cargo loading and unloading device provided with a lifting means for the pallet base between the upper transport means or the middle transfer means is made possible loading and unloading through the lifting table has been made vertically movably, the lifting platform of the lifting means The control device prohibits the operation of the upper transfer means and the middle transfer means during the lifting and prohibits the operation of the lifting platform of the lift means during the operation of the upper transfer means and the middle transfer means. That in the original control, when a state where the baggage on the middle stage transport means is loaded, even though the operation to unload the cargo from the middle stage transfer means unloading operation can not be performed, the upper transport means, A cargo loading / unloading apparatus comprising emergency transport means that enables operation of the intermediate transfer means and lift means to enable unloading operation from the intermediate transfer means.

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