JPS5919869B2 - Tail lock device for tail cabin vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tilt lock device for a tilt cabin vehicle in which a cabin portion is tiltable.

In a tilt cabin vehicle, it is dangerous to drive the vehicle without the cabin being locked to the vehicle body.

In contrast, in conventional vehicles of this type, a buzzer or indicator light is used to warn when the cabin is not locked to the vehicle body, but the mechanism for locking the cabin to the vehicle body is manual. As a result, there were cases where the locks were incomplete or the locks were accidentally released by ignoring warnings, and there were insufficient measures to protect against dangers due to the cabin not being locked.

This invention was made to eliminate the above-mentioned drawbacks, and the mechanism for locking the cabin to the vehicle body is driven by an actuator, so that the cabin is automatically locked to the vehicle body when the ignition switch is turned on. Accordingly, it is an object of the present invention to provide a tilt lock device that can securely lock a cabin and prevent danger.

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

In FIGS. 1 and 4, 1 is a cabin of a tilt cabin vehicle in which the front end of the cabin can be tilted forward via a hinge member, and 2 is a frame 3 hanging from the bottom surface of the cabin 1.
A receiving frame 4 is provided on the vehicle body side to stop the receiving, and 4 is a locking hook, which is pivotally supported on a fulcrum 6 of a plate fixed to the frame 3.

The lock hook 4 rotates in the B-B' force direction about the fulcrum 6 in conjunction with the link mechanism 8 that swings in the A-A' force direction with the rotation of the motor 7, and stands on the receiving frame 2. It is adapted to be engaged with a provided inverted U-shaped engagement bar 9 or to be detached from this engagement bar 9.

FIG. 2 shows a control circuit for the locking mechanism shown in FIG. 1, where 4 is the locking hook shown in FIG. 1, 7 is a motor, and 9 is a locking bar.

Reference numeral 10 denotes an ignition switch of the automobile, one terminal of which is connected to an on-vehicle battery 11, and the other terminal connected to a pilot lamp 12 for an unlock warning and a load 13 such as a twerp pump.

14 is a push button type control switch, one of which has a normally closed contact 14b1 connected to the other terminal (load side) of the ignition switch 10, a normally open contact 14a1 which is grounded, and a common contact 14c1 which is connected to the motor 7. There is.

The normally open contact 14a2 of the control switch 14 is connected to the battery 11, and the common contact 14c2 is connected to the lock side contact of a detection switch 15 that detects whether the cabin 1 is locked.

The non-lock side contact UL of this detection switch 15 is grounded, and the common contact C is connected to the motor 7.

The detection switch 15 is provided, for example, on the upper surface of the receiving frame 2 as shown in FIG. 1, and is switched to the L side when the lowermost surface of the frame 3 is fitted into the receiving frame 2.

In the device configured as described above, when the cabin 1 is in the unlocked state, that is, when the hook 4 is not engaged with the locking bar 9, the detection switch 15 is located as shown by the solid line in the figure, and the ignition switch is 10 is turned on, a voltage is applied to the pilot lamp 12 to turn it on, and a voltage is applied to the motor 7 through the contact 14b1 of the control switch 14, causing the motor 7 to rotate in the forward direction.
The locking hook 4 is rotated in the direction B' and engaged with the locking bar 9 to lock the cabin 1 to the vehicle body.

Due to this lock, the detection switch 15 is switched to the lock L side, the motor 7 is stopped, and the pilot lamp 12 is turned off.

In addition, if you press the control switch 14 in the locked state,
This switch is switched to the 14a1, 14a2 side, the motor 7 is reversed, and the locking hook 4 is rotated in the direction B.
unlock.

In the above embodiment, when the vehicle is in the locked state, pressing the control switch 14 unlocks the cabin even if the ignition switch 10 is on, which is inconvenient.

The embodiment shown in FIG. 3 eliminates this kind of inconvenience, and connects the inhibitor relay 16 to the load side of the ignition switch 10, and connects its normally closed contact 116b to the contact 14c2 of the control switch 14 and the lock of the detection switch 15. It is inserted between the contact point on the side.

Note that parts equivalent to those in the embodiment shown in FIG. 2 are given the same reference numerals.

According to this circuit configuration, when the ignition switch 10 is turned on, the inhibitor relay 16 is energized and the normally closed contact 16b is opened, so that the control switch 1
Even if 4 is pressed, no voltage is applied to the contacts of the detection switch 15, and therefore the motor 7 remains stopped and the cabin is not unlocked.

Note that when the ignition switch 10 is turned off, the inhibitor relay 16 is not energized and the normally closed contact 16b is closed, so if the control switch 14 is pressed and the motor 7 is in the locked state, the motor 7 is reversed. The lock will be released.

The rest of the structure and operation are the same as the embodiment shown in FIG.

In each of the above-described embodiments, the actuator for driving the locking hook is not limited to a motor, and a hydraulic cylinder or the like may be used.

As detailed above, this invention automatically locks the cabin when the ignition switch is turned on in a tilt-cabin type vehicle, so that it is possible to avoid accidentally starting the vehicle with the cabin unlocked. There is no need to worry about this, and driving safety can be significantly improved.

Further, by driving the locking mechanism with an actuator, it becomes possible to operate the locking mechanism using a push button switch, etc., thereby facilitating locking and unlocking operations of the cabin.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a cabin locking mechanism used in this invention, FIG. 2 is a circuit diagram showing one embodiment of this invention, FIG. 3 is a circuit diagram showing another embodiment of this invention, and FIG. The figure is a partial cross-sectional view taken along the line IT--IT in FIG. 1. 1...cabin, 2...reception frame, 4.
...Lock hook, 7...Motor, 9
...Lock bar, 10...Ignition key, 14...Control switch, 15
...Detection switch.

Claims (1)

[Scope of Claims] 1. In a tilt cabin vehicle in which the front end of the cabin can be tilted forward via a hinge member, an actuator that operates a lock member that releasably locks the cabin and the vehicle body, and a lock member: a member. a detection switch for detecting whether the cabin is locked or unlocked, the detection switch and an actuator are connected in series with an ignition switch, and the actuator is actuated when the ignition switch is on and the cabin is unlocked; A tilt lock device for a tilt cabin vehicle, characterized in that the cabin is locked to the vehicle body by a locking member. 2. A control switch is provided between the ignition switch and the actuator, and the lock side contact of the detection switch is connected to the power source via the normally open contact of the control switch, so that when the ignition switch is locked, the actuator is operated in reverse by operating the control switch. 2. A tilt lock device for a tilt cabin vehicle according to claim 1, wherein the tilt lock device is configured to release the lock. 3. The tilt cabin vehicle according to claim 2, wherein an inhibitor relay is provided which is excited when the ignition switch is turned on, and the normally closed contact of the inhibitor relay is connected in series to the lock side contact of the detection switch. tilt lock device.