JPS6139636Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container handling vehicle having a loading platform on which a container of a loading/unloading device is mounted, and a container loading/unloading device for the loading platform.

Among these types of container handling vehicles, a type called a tilt loader has a tiltable container support frame on the loading platform, and the container is tilted by a winch attached to the support frame. It is pulled upwards by a cable and installed. When unloading a container, the cable is unwound from the winch and the container is lowered to the ground in the same tilted state.

When loading and unloading containers in this way, workers carry a portable operation panel to the container to connect and disconnect cables to the container, and operate the winch for loading and unloading using the portable operation panel. However, container handling vehicles have a fixed operation panel in the driver's cab, and loading and unloading operations can also be performed from this operation panel. There is a possibility that another worker in the operator's cab may operate the winch using the fixed operation panel without knowing that the operator is present. When such a situation occurs, if a cable is attached to the container, the container may move, for example, as if being pulled by a vehicle, and there is a risk of hitting the worker. Furthermore, the ability to operate from both a fixed operation panel and a portable operation panel itself poses a safety problem.

Therefore, the present invention aims to provide a container handling vehicle that is free from the above-mentioned dangers and safety problems.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, numeral 1 is a container that can accommodate cargo inside. 2 is a vehicle consisting of a driver's cab 3 and a loading platform 4;
A tilt frame or container support frame 7 is provided which is pivotally connected by pins 6 of bracket 5. The support frame 7 is rotatable around the pin 6 in an upward and downward manner by a hydraulic cylinder (not shown), and assumes an inclined state at the container loading position shown by solid lines in FIG. A winch 8 is provided on the support frame 7 as a mechanism for loading and unloading the container, and a hook 10 at the tip of a cable 9 wound around the winch is hooked onto a hanging rod 12 of the container 1, and the winch 8 is used to secure the cable. When the container 9 is wound up, the container 1 is pulled up by the cable 9 onto the container support frame 7 in an inclined state. Next, when the container support frame 7 is rotated to the horizontal position shown by the chain line, the container 1 also assumes a horizontal position. Note that the container 1 is immovably fastened to its support frame 7.

The winch 8 is normally driven by power extracted from a power take-off section PTO of the vehicle's engine system. A fixed operation panel 13 is provided inside the operator's cab 3 for operating the winder 8, a hydraulic cinder for tilting the container support frame, and the like.

On the other hand, a portable operation panel 14 is provided which is operated by an operator O outside the vehicle, and a cord 16 is led out from a storage section 15 of the portable operation panel 14. The storage section 15 has a box shape with a lid on the front, and inside thereof, as shown in FIG. ing. The lowering of the mounting plate 18 is limited by a stopper 20. Further, the mounting plate 18 is biased upwardly away from the stopper 20 by a spring 21. The aforementioned gord 16 is led out from the micro switch SW, and the actuator 23 of this micro switch SW is in contact with the bottom surface of the aforementioned mounting plate 18. A circuit 24 leading to the engine battery B via the main switch MS and a circuit 26 leading to the fixed operation panel switch 25 are led out from the micro switch SW. The aforementioned driver's cabin operation panel 13 is provided with, for example, a main switch MS, a switch 25, and the like. Note that it is convenient that the storage section 15 also serves as a storage section for the cord 16.

Micro switch SW, main switch MS,
The electrical connections of the portable operation panel 14, fixed operation panel switch 25, etc. are as shown in FIG. The micro switch SW has a normally open contact NO and a normally closed contact NC, and the normally closed contact NC of this switch is closed only when the portable operation panel 14 is taken out from the storage section 15. And, for the normally closed contact NC, there is a portable operation panel 1.
4 is connected. On the other hand, a fixed operation panel switch 25 is connected to the normally open contact NO through a circuit 26.
Further, the common contact of the microswitch is connected to the battery B via the main switch MS by the circuit 24 described above. The movable contact of the micro switch SW is displaced in response to the displacement of the portable operation panel mounting plate 18, and when the mounting plate 18 is displaced downward, the movable contact contacts the normally open contact NO. When the mounting plate 18 is displaced upward by the force of the spring 21, the movable contact comes into contact with the normally closed contact NC.

Next, to explain the operation, in order to load the container 1 in the state shown in FIG. Wind up the cable 9. Winch 8 at this time
This operation can be performed, for example, by operating a fixed operation panel switch 25 in the driver's cab 3. In this case, if the portable operation panel 14 is not used,
Since the operation panel 14 is housed in the storage section 15, the mounting plate 18 is lowered by its own weight until it touches the stopper 20, and the normally open contact NO of the micro switch SW is closed. Therefore, if the main switch MS is closed in advance, the battery B circuit 24 can be opened and closed by operating the fixed operation panel switch 25, so that the engine can also be operated as the drive source for the winch 8. be able to. At this time, the micro switch
The movable contact of the SW is connected only to the circuit (first circuit) 26 of the fixed operation panel switch 25 and not to the circuit (second circuit) 16 of the portable operation panel 14. Even if the winch 8 is operated in the stored state, the engine as a drive source for the winch 8 cannot be operated. Therefore, it is impossible to operate both operation panels 13 and 14 at the same time.

On the other hand, if the operator O goes out of the vehicle and takes out and operates the portable operation panel 14 while monitoring the container etc., the weight of the portable operation panel 14 will not act on the mounting plate 18. The mounting plate 18 is raised by the spring 21, and the normally closed contact of the micro switch SW is
Since the NC is closed, the second circuit 16 is connected to the battery circuit 24, and the engine can be operated using the portable operation panel 14. On the other hand, since the first circuit 26 is open, the engine cannot be operated even if the fixed operation panel switch 25 is operated. In this way, since both operation panels 13 and 14 cannot be operated simultaneously, there is no problem in terms of safety, and even if the operator O holding the portable operation panel 14 is near the container 1 etc.
No dangerous situation will occur due to the operation of the fixed operation panel 13 in the driver's cab.

Note that the above-mentioned functions and effects can be obtained in the same way when the winch 8 unwinds the cable 9 and lowers the container 1 from the inclined support frame 7 to the ground.

As described above, according to the present invention, when the portable operation panel is taken out and used, the fixed operation section on the driver's seat becomes inactive, so it is difficult to operate the portable operation panel from outside the vehicle. There is no danger to workers,
Further, it is possible to prevent a situation where different people operate both operation sections at the same time.

[Brief explanation of the drawing]

Figure 1 is a side view of the container handling vehicle of the present invention.
Figure 2 is a diagram mainly showing the portable operation panel storage section;
FIG. 3 is an electrical circuit diagram. 1... Container, 4... Loading platform, 7... Container support frame, 8... Winch (loading/unloading device),
9... Cable, 10... Hook, 13... Fixed operation panel, 14... Portable operation panel, 15... Portable operation panel storage section, 18... Placement plate, SW... (micro) switch, MS...Main switch, 25
...Fixed operation panel switch, 26...1st circuit, 1
6...Second circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A loading platform on which containers can be loaded and unloaded, a device for loading and unloading containers onto the loading platform, a drive device for the loading and unloading device, and a device installed in the driver's cab for operating the drive device. A container cargo handling vehicle having a fixed operation section is provided with a portable operation panel for operating the drive device, and includes a first electric circuit connecting the drive device of the loading/unloading device and the fixed operation section. A second electric circuit is provided to connect the drive device of the unloading device and the portable operation panel, and the vehicle body is provided with a storage section for the portable operation panel, and the storage section is equipped with a switch that responds to removal of the portable operation panel. and switch this switch to the first and second positions.
A vehicle, wherein the switch is inserted into an electrical circuit and is configured to open a first electrical circuit and close a second electrical circuit in response to removal of the portable control panel. 2 The switch that responds to the removal of the portable operation panel,
Scope of Utility Model Registration Claim No. 1, which has a movable contact that is displaced by the weight of the portable operating panel when the portable operating panel is stored in the storage section, and returns to its original position when the portable operating panel is removed. The container handling vehicle described in paragraph 1.