JP4744838B2 - Operating range control device for operating device in container handling vehicle - Google Patents

Description

  The present invention relates to a container handling vehicle having a cargo handling device that loads and unloads a container between a vehicle body and the ground and tilts backward on the vehicle body, and specifically, the operation of the cargo handling device is performed by a wireless operation device. It relates to safety control when operating.

  Conventionally, the hook provided at the tip of the cargo handling device is engaged with the engagement pin of the container, the container is loaded onto the vehicle body from the ground by the operation of the cargo handling device, and the container is lowered from the vehicle body to the ground by the reverse operation. There is also provided a container handling vehicle in which the container is tilted rearward on the vehicle body by the operation of the cargo handling device.

By the way, the cargo handling device is operated in this way by an operator operating a wired operation device provided in a cab or the like (see, for example, Patent Document 1).
Utility Model Registration No. 2525461

  However, when the operating device is a wired type, there is a problem that the operable range is restricted even in the driver's cab, and the cord is entangled with other devices in the driver's cab and the like, resulting in poor usability.

  Therefore, a wireless operation device has been desired. However, if the operation device is wireless, it is necessary to pay attention to the following points.

  For example, when the hook of the cargo handling device is engaged with and disengaged from the engagement pin of the container, it is possible to correct the displacement of the hook with respect to the engagement pin by moving the vehicle without applying the parking brake (side brake). Since the work can be carried out smoothly, the parking brake is often not applied when the container is being unloaded by the cargo handling device.

  If the vehicle is about to run away during the loading and unloading operation without applying the parking brake in this way, with the conventional wired operation device, the operator is operating in the driver's cab and immediately There is no problem that you can quickly stop runaway by applying a service brake (foot brake) or parking brake (hereinafter referred to as “brake etc.”), but with a wireless operation device, the operator can operate away from the cab, so the brake There is a possibility that the vehicle cannot be applied immediately, and the vehicle may run out of control.

  Therefore, when the cargo handling device is operated by the wireless operation device, the operator can apply the brake etc. immediately even if the vehicle seems to run away because the parking brake is not applied. It was necessary to keep the operation in a constant state.

  The object of the present invention is to set the operation range by the operator in advance in the driver's cab or in order to be able to immediately apply a brake or the like even if the cargo handling device is operated by a wireless operation device. An object of the present invention is to provide an operation range regulating device for an operation device in a container handling vehicle that is safe and highly reliable by regulating the surrounding range.

In order to achieve the above object, an operation range restriction device for an operation device in a container handling vehicle according to the first aspect of the present invention includes an unloading operation for unloading a container between the vehicle body and the ground, and a container on the vehicle body. In a container handling vehicle configured such that the dumping operation for tilting backward is performed by the operation of a cargo handling device mounted on a vehicle body, the cargo handling device is operated by a control means from a wireless operation device. A storage box is provided that is controlled based on the signal and stores the operating device in the driver's cab, and is turned ON when the operating device is stored in the storage box, while the operating device is removed from the storage box. permission switch is OFF operation is provided in the case, are control means for a predetermined time only the operation device from OFF operation permission switch Operation restricting means to enable starting the operation by which those are provided.

The operation range regulating device of the operation device in the container handling vehicle of the invention according to claim 2 includes an unloading operation for unloading the container between the vehicle body and the ground, and a dumping operation for tilting the container backward on the vehicle body. , in the produced container handling vehicle as performed by the operation of the onboard cargo apparatus to the vehicle body, the handling apparatus, its operation is controlled based on the operation signal from the radio type operating device by the control means, the The control means allows the operation by the operation device to be started only while operating the permission means provided in the driver's cab, while only the predetermined time after the operation of the permission means provided in the driver's cab is completed. The operation by the operation device can be started, and when the operation by the operation device is performed within the predetermined time, the operation by the operation device is ended. After, in which the operation restricting means to enable starting the operation by the operating device again provided only for a predetermined time.

The billing operation range restricting device of the operating device in the container handling vehicle of the invention according to claim 3, wherein the enabling means comprises a first detecting means for detecting the operation of the foot brake, based on the detection of the first detection means The operation by the operation device can be started .

In the operation range restriction device for an operation device in a container handling device according to a fourth aspect of the invention, the permission means includes a second detection means for detecting an operation of a parking brake, and the detection means detects the second detection means based on the detection by the second detection means. The operation by the operation device can be started .

  According to the present invention, the operation range by the operator can be restricted to a predetermined range in or around the driver's cab, and when the container is loaded and unloaded without applying the parking brake, the vehicle is temporarily Even if the vehicle moves unexpectedly, the vehicle can be stopped immediately by applying a brake or the like. As a result, even when a wireless operation device is used, it is possible to prevent accidents caused by unexpected movement of the vehicle during work, and to ensure high safety.

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

  FIG. 1 shows a container handling vehicle equipped with a container.

  This container handling vehicle is provided with a cargo handling device 2 for loading and unloading the container C on the vehicle body 1 and discharging the load in the container C.

  The cargo handling device 2 includes an outer arm 21 that is horizontally disposed in a state in which the container C is mounted, and a telescopic arm 22 that is formed in an L shape as a whole, including a vertical portion 22b that is vertically disposed in the same state. It has.

  The rear end of the outer arm 21 is rotatably supported via a dump frame 2a that is rotatably supported at the rear portion of the vehicle body 1.

  The telescopic arm 22 is formed in a substantially L shape by a horizontal portion 22a inserted into the outer arm 21 and a vertical portion 22b erected from the front end portion of the horizontal portion 22a. The horizontal portion 22a is shown in the figure. The outer arm 21 can be extended and contracted in the longitudinal direction by a non-extending cylinder.

  The vertical portion 22b is provided with a hook 23 that can be freely engaged with and disengaged from an engagement pin C1 provided on the container C at the tip thereof.

  Further, a hoisting cylinder 24 (see FIGS. 3 to 5) is connected between the outer arm 21 and the vehicle body 1, and the cargo handling device 2 is centered on the rear end portion by the elongating and retracting operation of the hoisting cylinder 24. And is configured to be rotatable in the front-rear direction.

  As the container C, an open type whose upper surface is opened or a sealed type whose upper surface is also closed is used, and the rear wall can be opened and closed so that the load can be discharged. In addition, the engaging pin C1 is provided at the upper part of the front wall, the support leg C2 is provided at the bottom front part, and the support roller C3 is provided at the bottom rear part.

  Furthermore, a roller 11 for smoothly loading and unloading the container C between the vehicle body 1 and the ground is provided at the rear end portion of the vehicle body 1.

  The container C loading / unloading operation of the container handling vehicle is as follows. First, with the container C mounted as shown in FIG. 1, the horizontal portion 22a of the extendable arm 22 is moved by the extendable cylinder as shown in FIG. The container C on the vehicle body 1 is slid backward by a predetermined length. Thereafter, as shown in FIG. 3, the container C is tilted by rotating the outer arm 21 together with the telescopic arm 22 by the hoisting cylinder 24. As a result, the container C can be lowered from the top of the vehicle body 1 to the ground as shown in FIG. Further, the ground container C can be loaded on the vehicle body 1 by the reverse operation to that described above.

  On the other hand, in the dumping operation for discharging the load loaded in the container C, the outer arm 21 and the dump frame 2a are integrally fixed by a lashing device (not shown) in a state where the container C is loaded on the vehicle body 1. By tying and retracting the telescopic arm 22 with respect to the outer arm 21, the cargo handling device 2 is pivoted upward as shown in FIG. After opening, discharge from the wall to the outside.

  By the way, in this container handling vehicle, the operation of the above-described cargo handling device 2 is performed by the control unit 4 as a control means based on an operation signal from the wireless operation device 3 as shown in FIG.

  As the operating device 3, for example, a changeover switch 31, an upper switch 32, and a lower switch 33 are provided.

  The changeover switch 31 is a switch for switching between the above-described loading and unloading operation of the container C and the dumping operation.

  When the loading / unloading operation is selected by the switching operation of the changeover switch 31, the upper switch 32 pulls up and loads the container C onto the vehicle body 1 from the ground or when the dumping operation is selected by the switching operation of the changeover switch 31. Is a switch for tilting the container C upward.

  The lower switch 33 lowers the container C from the vehicle body 1 to the ground when selecting the loading / unloading operation by the switching operation of the switching switch 31 or the container when the dumping operation is selected by the switching operation of the switching switch 31. A switch that causes C to lie down.

  The operation signals of these switches 31 to 33 are transmitted to the reception circuit 41 by the transmission circuit 34 incorporated in the operation device 3 and input to the control unit 4 through the reception circuit 41.

  The control unit 4 performs the above-described loading and unloading operations and the dumping operation of the container C by switching the control valves 5 based on the input operation signals and controlling the expansion and contraction cylinders 24 to expand and contract.

  Specifically, as shown in Table 1, when the changeover switch 31 is OFF, the container C is pulled up from the ground onto the vehicle body 1 by operating the upper switch 32, and the container is operated by operating the lower switch 33. The loading / unloading (demounting) operation of the container C for lowering C from the vehicle body 1 to the ground is performed.

  On the other hand, when the changeover switch 31 is ON, the dumping operation of tilting the container C upward by operating the upper switch 32 and tilting the container C on the vehicle body 1 by operating the lower switch 33 is performed. Do.

この際、制御部４には、荷役装置２の伸縮アーム２２やアウタアーム２１の状態を検出するリミットスイッチなどのセンサ６から検出信号が入力されており、この検出信号に基づいてコンテナＣの積降ろし動作とダンプ動作を行っている。

At this time, a detection signal is input to the control unit 4 from a sensor 6 such as a limit switch that detects the states of the telescopic arm 22 and the outer arm 21 of the cargo handling device 2, and the container C is loaded and unloaded based on the detection signal. Operation and dump operation are performed.

  The upper switch 32 and the lower switch 33 are configured to perform the above-described operations through the control unit 4 by, for example, continuing to be pressed. That is, a switch is employed that turns on when pressed and automatically returns to off when released to stop each operation.

  Further, it is preferable in terms of operation that the change-over switch 31 is a switch that maintains ON when pressed and returns to OFF when pressed again. Note that the changeover of the changeover switch 31 may be reversed from the above to select the dump operation when OFF and select the unloading operation when ON.

  By operating the operation of the cargo handling device 2 through the control unit 4 by the wireless operation device 3 in this way, the operator can easily move to a place where it is easy to work such as the driver's cab or the surrounding area for operation. The operability can be improved.

  In addition, the number of switches can be reduced as much as possible to make the device compact and convenient to carry at low cost.

  Further, the control unit 4 is provided with an operation restriction circuit 42 as operation restriction means.

  The operation restriction circuit 42 allows the operation by the operation device 3 to be started only while the permission switch 43 as the permission means provided in the driver's cab is being turned on. Accordingly, the operator can perform wireless operation by the operating device 3 only within a range in which the permission switch 43 provided in the driver's cab can be turned ON, so that the operating range of the operating device 3 of the operator is effectively reduced. It is possible to regulate, and it is possible to prevent accidents caused by unexpected movement of the vehicle during work.

  Further, as shown in FIG. 7, the operation by the operation device 3 may be configured to be started only for a predetermined time after the permission switch 43 provided in the driver's cab is operated.

  Specifically, it is configured such that the wireless operation by the operation device 3 can be started only for a predetermined time by turning on the permission switch 43 provided in the cab. That is, when the predetermined time has elapsed without starting the wireless operation by the operation device 3, even if each operation switch 32, 33 is operated by the operation device 3, the control unit 4 invalidates the operation. Therefore, the cargo handling device 2 cannot be operated by the operation device 3.

  Accordingly, when the predetermined time has passed without the operator operating the operating device 3, the operator cannot operate the cargo handling device 2 unless the operator turns back to the operating room and turns on the permission switch 43 again. become. In addition, the predetermined time is set to a time in which even if the operator gets out of the operator's cab, he can only stay in the vicinity.

  As a result, the operation range by the operator can be restricted to a predetermined range in or around the driver's cab, and the vehicle moves unexpectedly if the container C is being unloaded without applying the parking brake. Even if it starts, the vehicle can be stopped immediately by applying a brake or the like, and an accident due to unexpected movement of the vehicle during work can be prevented.

  Furthermore, as shown in FIG. 7, when the operation by the controller device 3 is started within the predetermined time after the permission switch 43 is turned ON, the operation by the controller device 3 is performed only within the predetermined time after the operation is completed. You may comprise so that the operation by the operating device 3 can be updated the appropriate number of times by comprising so that it can start.

  Specifically, in the operation restriction circuit 42, first, when the permission switch 43 is turned ON, the wireless operation by the operation device 3 can be started from the operation timer only for a predetermined time (see FIG. 7X). If the operation device 3 is operated within the set period, the operation timer 3 starts the operation by the operation device only for a predetermined time so that the operation device 3 can perform wireless operation again after the operation is completed. It is configured as possible (see FIGS. 7Y and Z).

  Then, as shown in FIG. 7, if the operation by the controller device 3 is not started within a predetermined time set as a certain Z, the operation is performed unless the operator returns to the driver's cab and turns on the permission switch 43 again. The operation by the device 3 cannot be started.

  In this way, the operation device 3 is configured so that the operation can be started again for a predetermined time, and this can be updated an appropriate number of times, so that the operation range of the operation device 3 can be matched to the actual operation of the operator. Thus, the operability of the operation device 3 can be improved while ensuring safety when the parking brake as described above is not applied by regulating the vicinity of the cab.

  In addition, the permission switch 43 may be provided in a storage box for storing the operation device 3 so that the permission switch is operated in conjunction with the storage and removal operations of the operation device 3 in the storage box.

  Specifically, for example, as shown in FIG. 8, when the limit switch 43 ′ is provided on the bottom surface of the storage recess 51 of the storage box 5 that stores the operation device 3, the limit switch 43 ′ is stored when the operation device 3 is stored in the storage recess 51. The switch 43 'may be turned on, while the limit switch 43' may be turned off when the operating device 3 is taken out of the storage recess 51.

  With this configuration, when the operating device 3 is stored in the storage box 5, the limit switch 43 ′, which is a permission switch, is turned on, so that the operating device 3 is stored in the storage box 5. The wireless operation by the operation device 3 can be started at any time while the operation device 3 is in operation.

  On the other hand, when the operating device 3 is taken out of the storage box 5, the limit switch 43 ', which is a permission switch, is turned off, so that wireless operation by the operating device can be started only for a predetermined time thereafter. When the wireless operation by the operation device 3 is started within the predetermined time, the wireless operation by the operation device 3 can be started again only for the predetermined time after the operation is completed as described above. The

  Further, when the wireless operation by the operation device 3 is not started even after the predetermined time has elapsed, the subsequent operation by the operation device 3 becomes invalid, so that the worker stores the operation device 3 in the storage box 5 again. Otherwise, the wireless operation by the controller device 3 cannot be started.

  As described above, the operation range of the operation device 3 by the worker can be effectively regulated by interlocking the operation of the permission switch with the storage / removal operation of the operation device 3 in the storage box 5. Since the worker does not need to operate the permission switch one by one, the work efficiency can be improved. In the above description, the case where the limit switch 43 ′ is used as the permission switch has been described. However, the present invention is not limited to this, and the storage and removal operations of the operation device 3 in the storage box 5 such as a micro switch and a proximity sensor can be detected. If it is such, it can be used similarly.

  FIG. 9 shows another configuration of the permission means.

  The permission means includes first detection means 44 for detecting the operation of the foot brake, and the operation restriction circuit 42 can start the operation by the wireless operation device 3 as described above by the detection of the first detection means 44. Thus, the operation range of the controller device 3 is restricted.

  As the first detection means 44, when the operator steps on the foot brake, this is detected directly by a detection device such as a limit switch, or the tail lamp that is turned on when the foot brake is stepped on. May be detected indirectly by a relay.

  As described above, the operation range of the operator's operating device 3 can be effectively restricted by the simple operation of simply stepping on the foot brake in this way, and accidents due to unexpected movement of the vehicle during work can be prevented. can do. Moreover, since both hands can be used, operations other than the operation of the controller device 3 can be performed simultaneously, and operability is good.

  Further, in the case of detecting the lighting of the tail lamp, the tail lamp lights up in the middle of depressing the foot brake even when the foot brake is not fully depressed. Since the operation of the cargo handling device 2 can be performed, the workability is improved.

  FIG. 10 shows still another configuration of the permission means.

  The permission means includes first detection means 44 similar to that described above for detecting the operation of the foot brake, and second detection means 45 for detecting the operation of the parking brake, and these first detection means 44 and second detection means. When any of 45 is detected, the operation restriction circuit 42 can start the operation by the wireless operation device 3 as described above, thereby restricting the operation range of the operation device 3.

  As the 2nd detection means 45, when an operator pulls a parking brake, what detects this directly with detection devices, such as a limit switch, is used.

  In this way, when any one of the first detection means 44 and the second detection means 45 is detected, the operation by the operation device 3 can be started, so that the parking can be performed together with the effect of only the first detection means 44 described above. By pulling the brake, it is possible to perform operations by the operation device 3 while ensuring safety even outside the driver's seat, and a wide range of operations can be performed according to the situation.

  FIG. 11 shows another configuration of the operation regulating circuit as the operation regulating means.

  This operation restriction circuit 46 enables operation by the operation device 3 through the control unit 4 only when an operator is present in the driver's cab by detection of the worker detection sensor 47 as the worker detection means provided in the driver's cab. Is.

  As the worker detection sensor 47, a seating detector for detecting whether or not a worker is seated on the driver's seat, a worker detector for detecting the presence of the worker in the driver's cabin, and the like are used.

  As the seating detector, there are a plate switch, a micro switch, and the like. By providing these on the seat of the driver's seat, it is detected that the operator is seated.

  In addition, a current collector type, a reflective photoelectric type, an ultrasonic type, or the like is used as the worker detector, and the worker is seated or seated by arranging these at appropriate positions in the cab. Detects being in the cab even without it.

  By operating the operation device 3 only when it is detected by such various worker detection sensors 47 that the worker is seated or not seated, the operation device 3 can be operated. The operable range can be restricted within the cab.

  As a result, even when the container C is being loaded and unloaded without applying the parking brake, even if the vehicle suddenly moves, the vehicle can be stopped immediately by applying a brake or the like. It is possible to prevent accidents caused by unexpected movement of vehicles. Further, since it is cordless, the cord does not get caught in other devices in the cab as in the wired type, and it is easy to use and has good operability.

  As described above, the operation restriction means 42 and 46 provided in the control unit 4 solve the safety problem that occurs when the unloading work is performed by the wireless operation device 3 without applying the parking brake. The cargo handling device 2 can be operated and operated in a safe situation.

It is a side view which shows a container handling vehicle. It is a side view for demonstrating the unloading operation | movement of the container in a container handling vehicle. It is a side view for demonstrating the unloading operation | movement of the container in a container handling vehicle. It is a side view for demonstrating the unloading operation | movement of the container in a container handling vehicle. It is a side view for demonstrating the dumping operation | movement of the container in a container handling vehicle. It is a block diagram which shows the control system based on operation device and operation of the operation device. It is a time chart which shows the operation possible time by the operating device based on ON operation of a permission switch. It is a perspective view which shows the storage box provided with the operating device and the permission switch. It is a block diagram which shows the other structure of a permission means. It is a block diagram which shows the further another structure of a permission means. It is a block diagram which shows the other operation control means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Handling apparatus 3 Operation apparatus 4 Control part (control means)
42 Operation restriction circuit (operation restriction means)
43 Permission switch (permission means)
44 First detection means 45 Second detection means 46 Operation restriction circuit (operation restriction means)
47 Worker detection sensor (worker detection means)
C container

Claims (4)

  Container loading and unloading configured so that loading and unloading operations for loading and unloading containers between the vehicle body and the ground and a dumping operation for tilting the container backward on the vehicle body are performed by the operation of a cargo handling device mounted on the vehicle body. In a vehicle, the operation of the cargo handling device is controlled by a control means based on an operation signal from a wireless operation device, and a storage box for storing the operation device is provided in the driver's cab and the operation device is stored. A permission switch that is turned on when the operation device is removed from the storage box while being turned on when stored in the box is provided, and the control means is operated only for a predetermined time after the permission switch is turned off. An operation control device for a container handling vehicle, characterized in that an operation restricting means for enabling operation by the device to be started is provided. Work range restricting device. Container loading and unloading configured so that loading and unloading operations for loading and unloading containers between the vehicle body and the ground and a dumping operation for tilting the container backward on the vehicle body are performed by the operation of a cargo handling device mounted on the vehicle body. In a vehicle, the operation of the cargo handling device is controlled by a control means based on an operation signal from a wireless operation device, and the control means is only operated while operating a permission means provided in a driver's cab. While the operation by the operation device can be started, the operation by the operation device can be started only for a predetermined time after the operation of the permission means provided in the driver's cab, and the operation device can be started within the predetermined time. when operation is performed after the operation by the operation unit is completed, the operation restricting means for enabling starting a predetermined time only the operation by the operating device again Operating range restricting device of the operating device in the container handling vehicle, characterized in that the obtained. The said permission means is provided with the 1st detection means which detects the action | operation of a footbrake, Based on the detection of this 1st detection means, operation by the said operating device was made possible to start . An operation range restriction device for an operation device in a container handling vehicle. The said permission means is provided with the 2nd detection means which detects the action | operation of a parking brake, Based on the detection of this 2nd detection means, operation by the said operating device was made possible to start. An operation range restriction device for an operation device in the container handling vehicle described above.

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