JPS626079Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a cargo handling device for a cargo handling vehicle that handles containers.

2. Description of the Related Art Conventionally, in a cargo handling device for a cargo handling vehicle that mainly handles containers, the distance between twist lock pins connected to the container can be adjusted in, for example, two steps depending on the container size.

For this reason, there were inconveniences such as, for example, medium-sized containers that did not fit the twist lock pin spacing could not be handled.

This invention was made with the aim of improving such inconveniences, and is intended to provide a cargo handling device for a cargo handling vehicle with a simple configuration, which can also handle medium-sized containers.

This invention will be explained in detail below with reference to an illustrated embodiment. In the figure, 1 is the main body of this device attached to a cargo handling vehicle (not shown), which consists of a frame 2 and slide booms 3 that are slidably inserted into both ends of this frame 2, and each slide boom 3 is an extendable and retractable boom. The cylinder 4 allows it to expand and contract horizontally with respect to the frame 2. In addition, a twist lock pin 6 is provided on the lower surface of the tip side of each slide boom 3 to detachably engage with a locking hole 5a opened in the upper surface of the container 5 to be handled. A stopper mechanism 7 is provided on the side to lock the slide boom 3 at a position where the distance between the twist lock pins 6 matches the distance between the locking holes 5a of the medium-sized container 5.
The stopper mechanism 7 includes a stopper 9 that is swingably supported by a bracket 8 that projects on the frame 2.
The end side of the stopper 9 is connected to the frame 2.
The stopper 9 can freely protrude and retract into the frame 2 through an opening 2a opened on the top surface, and the base end side of the stopper 9 is connected to a piston rod 10a of a lock cylinder 10 whose base end is pivotally supported at the end of the frame 2. It is pivoted at the tip.

On the other hand, FIG. 2 shows a hydraulic circuit, in which hydraulic pressure discharged from a hydraulic pump 11 is supplied to each boom extension/retraction cylinder 4 via a work equipment operating valve 12 and pipes 13 and 14. In addition, a solenoid valve 16 operated by a switch 15 provided in the driver's cab (not shown) is installed in the pipes 13 and 14.
A lock cylinder 10 is connected via the lock cylinder 10.

However, when handling a container 5 other than an intermediate size, turn off the switch 15 and turn off the solenoid valve 16.
is set at the cutoff position 16b. In addition, since oil pressure from the pipe line 13 or 14 is not supplied to the lock cylinder 10, the stopper 9 is at the position indicated by the broken line in FIG.

Next, when loading and unloading a medium-sized container 5, the switch 15 is turned on to set the solenoid valve 16 to the communicating position 16a. When hydraulic pressure is supplied to the boom extension cylinder 4 by the working machine operation valve 12, the lock cylinder 10, which has a small operating pressure,
operates first, projecting the tip of the stopper 9 into the boom 2. Next, the slide boom 3 is shortened by the boom extension cylinder 4, and the base end abuts against the stopper 9, i.e., when the spacing of the twist lock pins 6 matches the locking holes 5a of the medium-sized container 5, the boom is stopped. If used in this state, medium-sized containers can also be loaded and unloaded.

As detailed above, this idea enables cargo handling for medium-sized containers.
The range of use can be expanded, and since it is only necessary to add a solenoid valve, a stopper mechanism, etc. to the conventional circuit, it also has the effect of being easy and inexpensive to implement.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, with FIG. 1 being a partially omitted sectional view of this device, and FIG. 2 being a circuit diagram. 2 is a frame, 3 is a slide boom, 4 is a cylinder for extending and retracting the boom, 5 is a container, 5a is a locking hole, 6 is a twist lock pin, 7 is a stopper mechanism, 9 is a stopper, 10 is a lock cylinder, 13
14 is a pipe, 15 is a switch, and 16 is a solenoid valve.

Claims (1)

[Scope of utility model registration request] Slide booms 3 which are extendable and retractable by boom extension and retraction cylinders 4 are provided at both ends of the frame 2, and at the tips of these slide booms 3, twist lock pins 6 are connected to locking holes 5a of containers 5 to be handled.
A stopper mechanism 7 that can stop the slide boom 3 at a position where the interval between the twist lock pins 6 provided on the slide boom 3 matches the locking hole 5a of the medium-sized container 5 to be loaded is installed in the frame. A switch 15 is used to open and close between a lock cylinder 10 which is provided in a part of the boom 2 and which causes the stopper 9 of the stopper mechanism 7 to protrude and retract into the frame 2, and the pipes 13 and 14 leading to the boom extension/retraction cylinder 4. A cargo handling device for a cargo handling vehicle connected via a solenoid valve 16.