JPH0318307Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an automatic attachment/detachment coupler device for a tractor that connects a trailer while supporting the load of its front wheels.

(Prior Art) Conventional coupler devices are of a manual type, and have a main lock that locks the jaw in the closed state, and a sub-lock that locks the main lock in the state where the main lock locks the jaw.
It is configured to be activated to the unlocked state by each manual lever.

(Problem that the invention aims to solve) However, in order to disconnect from the trailer,
The operator (usually the tractor driver) moves to the side of the coupler device and manually operates the main lock manual lever and the sub-lock manual lever in sequence to release the lock by operating the main lock and sub-lock respectively to the unlocked state. There is a problem that must be dealt with.

Furthermore, when connecting a trailer, there is a problem in that the operator must reconfirm that the main lock and sub-lock are in the unlocked state by walking to the manual lever position and manually operating both manual levers.

Although it is conceivable to solve these problems by linking cylinders to each manual lever and controlling them remotely, the following new problem arises.

In other words, while the lock of the jaw can be unlocked inside the cabin by remote control using the cylinder and the kingpin can be disconnected, the automatic locking of the jaw using the main lock and sub-lock, which could be done automatically with the manual type, is now possible.
This cannot be done unless the cylinder is actuated.As a result, the locking of the jaw must be confirmed in advance to ensure that the king pin is connected to the jaw, and then reconfirmed that the lock is secure after the fact. become.

The present invention was developed in view of these circumstances, and it is possible to remotely control the unlocking of the jaw through the main lock and the sub-lock, and the locking of the jaw can be automatically performed by the main lock and the sub-lock at the same time that the king pin is connected to the jaw. The object of the present invention is to provide an automatic detachable coupler device for a tractor that can be locked.

(Means for Solving the Problem) In order to achieve the purpose of cutting, the present invention has a pair of left and right jaws on the lower surface of the guide groove of the kingpin, which is formed up to the center of the mounting surface of the base. The main lock is supported by a spring so that it can be freely closed when the king pin is loosely fitted into the jaw, and can be opened when it is detached from the jaw. A cylinder rod is provided with a sub-lock attached to the main lock and biased by a spring so as to be able to lock the main lock in a locked state, and a lever that can engage and release the main lock, and a cylinder rod that automatically returns to the sub-lock with a spring in the cylinder. are connected to each other via flexible connecting cables.

(Operation) With respect to the closed jaw, the cylinder on the sub-lock side operates, and its driving force releases the lock from the main lock through the connecting rope, and then the cylinder on the main lock side operates to release the lock. The lock is unlatched and unlocked from the jyo through the connecting cable by the driving force, and the jyo becomes openable and the connection of the kingpin is effectively released, and as the kingpin separates from the chuck part. It will be opened.

In addition, in a state in which the jaw can be opened, the rods of both cylinders move back by spring pressure to loosen the connecting rope, and the main lock and sub-lock each receive spring pressure and stand by so that they can move back to the locked state.

Then, the king pin loosely fits into the chuck,
When the jio closes, the main lock that was waiting first receives spring pressure and engages the jyo.
The jaw is locked in the closed state, and then the sub-lock engages the main lock by spring pressure, and the main lock is locked in the jaw's locked state.At the same time, both connecting cables are stretched without slack, and both cylinders lock the main lock and the sub-lock. Prepared to be able to release, Jiyo automatically locked in the closed state,
A king pin is loosely connected to the chuck portion.

(Example) An example of implementing the present invention will be described in detail below with reference to the drawings.

A in the figure is a manual detachable coupler device, and this device A attaches a base 3 to the bracket 2 of the sub-base 1 so as to be able to swing back and forth.
A pair of left and right jaws 6 are installed on the lower surface of the guide groove 5 of the king pin B, which is formed up to the center of the mounting surface 4.
Kingpin B for the chuck part 7 of the same Joe 6
It is pivoted to be freely movable to close when it is loosely fitted, and pivoted to be movable to open when it is detached from the king pin B.
A main lock 8 is biased by a spring 9 so that it can be engaged with the jaw 6 and locked in the closed state.
is biased by a spring 11 so that it can be engaged with the main lock 8 and locked to the locked state of the jaw 6. A spring 14 in a cylinder 13 is attached to a lever 12 that can engage and release the main lock 8 from the jaw 6.
A cylinder rod 15 that automatically returns to its original position is connected to the sub-block 10 via a flexible connecting cable 16, and a cylinder rod 19 that automatically returns to its original position by a spring 18 in the cylinder 17 is connected to the sub-block 10 via a flexible connecting cable 20. .

The jaw 6 is biased from the closed state to the open state by a spring 21, and maintains the open state with the main lock 8 disengaged and released, and the king pin B disengaged, so that the king pin B is loosely fitted into the chuck portion 7. I'm trying to wait as long as possible.

The cylinders 13 and 17 are each connected to an air tank 23 via a magnetic air valve 22.
Both magnetic air valves 22 are electrically short-circuited to a control box 24, and in response to a lock release command from the box 24, first the cylinder 17 on the sub-lock 10 side operates, and then the cylinder 13 on the main lock 8 side operates. It is timed to operate.

The tethers 16 and 20 are flexible wires or the like.

As a result, by leaving the joint between the tractor C and the trailer D in an open state and moving the tractor C backward with respect to the stopped trailer D, the king pin B is loosely fitted into the chuck portion 7 and at the same time. , the main lock 8 is pushed by the spring 9 and engaged with the jaw 6, automatically locking the king pin B in the connected state, and after the main lock 8 automatically locks the jaw 6, the sub-lock 10 is pushed by the spring 11 to the main lock 8. When engaged, the connected state of the king pin B is automatically locked in a double manner.

Also, to disconnect the trailer D, operate the control box 24 from inside the cabin _C1 , and use the cylinders 13 and 17 to latch and unhook the main lock 8 from the jaw 6 and the sub-lock 10 from the main lock 8, respectively.
Tractor C can be moved forward and separated from trailer D.

Further, in the above embodiment, a manual lever (not shown) may be connected to the sub-lock 10 in an interlocking manner, and the connecting cable 20 may be connected to this manual lever, and the lever 12 may also serve as the manual lever.

In this case, the connected state of the king pin can also be unlocked by manual operation by operating each manual lever in the order of the sub-lock and then the main lock, respectively, to engage and disengage the sub-lock from the main lock and the main lock from the gear. , even if a problem occurs in the remote control system using the cylinder, you can immediately respond.

(Effect of idea) Therefore, the present invention has the following advantages.

The trailer can be detached freely by remote control.

To connect the trailer, simply back up the tractor onto the trailer and loosely fit the king pin into the chuck of the jack.The main lock and sub lock can be used to automatically lock the trailer twice, which can prevent accidents such as forgetting to lock the trailer. do not have.

[Brief explanation of the drawing]

FIG. 1 is a plan view, partially cut away, showing an example of an embodiment of the automatic detachable coupler device of the present invention. FIG. 2 is a longitudinal sectional view taken along the - line. FIG. 3 is a plan view showing a state in which the king pin is loosely fitted into the jaw and automatic locking is performed by the main lock and sub-lock. FIG. 4 is a plan view of the state in which the king pin is unlocked by remote control. FIG. 5 is a side view, partially cut away, showing the trailer truck equipped with the apparatus of FIG. In the figure, B is the king pin, 3 is the base, 4 is the mounting surface, 5 is the guide groove, 6 is the jaw, 7 is the chuck part,
8 is the main lock, 9, 11, 14, 18 are springs, 10 is the sub-lock, 12 is the lever, 13, 1
7 is a cylinder, 15 and 19 are cylinder rods, 1
6 and 20 are connecting ropes.

Claims (1)

[Scope of utility model registration request] A pair of left and right jaws are mounted on the lower surface of the back of the guide groove of the kingpin, which is formed up to the center of the mounting surface of the base, so that it can be freely closed when the kingpin is loosely fitted into the chuck of the same jaw, and can be freely opened when it is removed. The main lock is supported by a spring so that the main lock can be engaged with the jaw to lock it in the closed state, and a sub-lock can be engaged with the main lock to lock the jaw in the locked state. This automatic attachment/detachment coupler device for a tractor comprises a lever which is biased by a spring and is provided with a main lock and can be operated to engage and detach, and a cylinder rod which automatically returns to the sub-lock by a spring in the cylinder is flexibly connected to each other via a connecting cable.