JPH07113364A - Remote lock device for truck load-carrying platform door - Google Patents

Abstract

PURPOSE:To use a remote lock device for a long period of time by way of eliminating a trouble of unclocking a load-carrying platform door and restraining wasteful electric consumption by providing a transmission part to transmit an unlocking signal, an electric power source part and a travelling vibration detection part and containing a timer circuit in them. CONSTITUTION:When a worker 8 with a portable apparatus 9 approaches a truck 1, vibration of the protable apparatus 9 is detected by a travelling vibration detection part 22. In this case, everytime a timer circuit 24 inputs output from the detection part 22, an electric power source part 18 is kept in an ON state for a specified period of time. Accordingly, an unlocking signal is intermittently transmitted within a specified period of time from a transmission part 16 of the portable apparatus 9. Thereafter, by receiving the unlocking signal by a car mounted machine 4 and actuating a lock unit 3, a load-carrying platform door is automatically unlocked. Additionally, when the worker 8 recedes from the truck 1, the unlocking signal is not received and it is automatically locked. Consequently, it is possible to automatically lock and unlock the load-carrying platform door 2 and to prevent inconvenience of suddenly unlocking it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck bed door remote lock device for locking and unlocking a truck bed door by radio waves.

[0002]

2. Description of the Related Art A padlock is usually used to prevent the stolen cargo from being stolen, and the paddle door is locked or unlocked by the padlock. If the loading door is frequently opened and closed, the cylinder key must be inserted each time to unlock the padlock, which makes the unlocking operation troublesome.

In order to eliminate such complication, conventionally, a portable device having an unlock signal transmission switch is provided, and a lock unit and an in-vehicle device are installed on the truck side so that an operator can transmit the transmission switch of the portable device. The unlock signal is transmitted by operating the, and when this unlock signal is received by the in-vehicle device of the truck, the in-vehicle device operates the lock unit accordingly and unlocks the luggage carrier door. A device is provided.

However, in such a conventional device,
For example, when the operator holds the luggage with both hands, the transmission switch of the portable device cannot be operated and the luggage door can be unlocked by first lowering the luggage on the ground. There are inconveniences such as having to operate the transmission switch again.

On the other hand, as another conventional technique, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-274061, bidirectional communication between a portable device and an in-vehicle device is enabled so that the portable device is locked. Some have made it possible to confirm the unlocked state, but in order to perform such bidirectional communication, both the portable device and the in-vehicle device need to have a transmission / reception function, so the entire device costs It will be up.

[0006] Therefore, the inventors of the present invention provided a portable device that constantly sends an unlocking signal without operating the unlocking switch, and an operator approached the luggage carrier door of the truck and unlocked it with an in-vehicle device. There is provided a device for activating a lock unit to unlock the bed door when a signal is received (see, for example, Japanese Patent Application No. 4-206523).

In this device having a portable device of constant transmission type, even if the operator does not perform a special operation for unlocking the door of the truck bed, it is automatically unlocked when the worker approaches the door. In addition, it is convenient because it can save the trouble of unlocking.

[0008]

However, in the above portable device, the unlock signal is always transmitted from the portable device even when it is not necessary to unlock the luggage carrier door. For example, when using a battery, there is a problem that the battery is consumed quickly and must be replaced within a short period of time.

It is an object of the present invention to not only save the trouble of unlocking the truck bed door of a truck, but also to suppress the wasteful power consumption of the portable device and enable it to be used for a long time.

[0010]

In order to solve the above-mentioned problems, the present invention comprises a portable unit carried by an operator, a lock unit mounted on a truck, and an in-vehicle unit,
The portable unit transmits an unlock signal to unlock the truck bed door, the lock unit electrically locks and unlocks the truck door, and the in-vehicle unit unlocks the unlock signal from the portable unit. In response to this unlocking signal, the lock unit is unlocked and the locked state is held when the unlocking signal is not accepted. Take.

That is, according to the present invention, the portable device is provided with a transmitter for transmitting an unlocking signal and a power source for supplying transmission power to the transmitter, and a walking vibration detector for detecting the presence or absence of walking vibration. And a timer circuit that holds the power supply unit in the ON state for a predetermined time in response to the walking vibration detection output from the walking vibration detection unit.

[0012]

In the above structure, when the worker carrying the portable device approaches the truck for loading and unloading the luggage, the vibration of the portable device due to the walking of the worker is detected by the walking vibration detecting section. The timer circuit, in response to the detection of the walking vibration, holds the power supply unit in the ON state for a predetermined time. This allows
The unlocking signal is intermittently transmitted within a predetermined time from the transmitting unit of the portable device. Then, when the unlock signal from the portable device is received by the in-vehicle device, the in-vehicle device operates the lock unit to automatically unlock the luggage carrier door. Further, when the worker moves away from the truck to some extent, the unlocking signal from the portable device is no longer received by the in-vehicle device, so that the luggage carrier door is automatically locked.

On the other hand, when an operator drives a truck,
When the user is not walking, the walking vibration detection unit does not output the walking vibration detection signal even if the worker carries the portable device. Therefore, the power supply unit remains in the off state, the unlock signal is not transmitted from the transmission unit of the portable device, and unnecessary power consumption is prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing an installed state of a remote lock device for a truck bed door according to an embodiment of the present invention.

In the figure, reference numeral 1 is a truck, 2 is a cargo door of the truck 1, and 3 is a lock unit for unlocking and locking the cargo door 2, which is attached to the cargo door 2. Further, 4 is an in-vehicle device mounted on the truck 1, 5 is a receiving antenna of the in-vehicle device 4, 7 is a lock handle, 8 is a worker, and 9 is a portable device carried by the worker 8.

FIG. 2 is a block diagram showing the configuration of the portable device 9 of this embodiment.

The portable device 9 transmits an unlocking signal for unlocking the luggage carrier door 2 of the truck 1, and an intermittent oscillation circuit 10 for intermittently outputting a transmission trigger signal (for example, every one second). Unique ID preset for each mobile device 9
Code generator 14 for generating a code, intermittent oscillation circuit 10
Each time a transmission trigger signal from the device is input, the ID code from the code generator 14 is converted into serial data for transmission, and then the serial code is subjected to AM, FM, PM modulation, etc. A walk that includes a transmitter 16, the intermittent oscillation circuit 10, the code generator 14, a power supply 18 that supplies power to the transmitter 16, and an antenna 20 for transmitting an unlocking signal, and that detects the presence or absence of walking vibration. A vibration detection unit 22 and a timer circuit 24 that outputs a signal for holding the power supply unit 18 in the ON state for a predetermined time (for example, 6 seconds) in response to the walking vibration detection output from the walking vibration detection unit 22. I'm out.

The power supply unit 18 has a built-in battery such as a dry battery or a rechargeable battery, and a switch (both not shown) for turning on / off the power supplied from the battery in accordance with the output of the timer circuit 24. Composed. The walking vibration detection unit 22 is a mechanical vibration sensor using a pendulum,
Alternatively, it is composed of an electric vibration sensor using a piezoelectric element. The timer circuit 24 is configured by a retriggerable mono-multi circuit that is retriggered each time a walking vibration detection signal from the walking vibration detection unit 22 is input. Furthermore, from the viewpoint of preventing accidental unlocking, the transmission unit 16 has its radio wave output range set to a distance (for example, about 10 m) relatively close to the platform door 2.

FIG. 3 is a block diagram showing the configuration of the vehicle-mounted device 4 of this embodiment.

The in-vehicle device 4 receives the unlocking signal from the portable device 9 and unlocks the lock unit 3 in response to the unlocking signal. When the unlocking signal is not accepted, the locked state is obtained. For holding the receiving antenna 5
The receiving unit 26 that demodulates and extracts the unlocking signal received in step 1 into the data of the ID code, the ID code setting unit 28 that can preset the ID code unique to the portable device 9, and the ID code that is received by the receiving unit 26. And the ID code set by the code setting unit 28, and outputs a match signal when the two match, the code comparing unit 30.
In response to a match signal input from
The timer circuit 32 outputs an unlocking operation signal to the lock unit 3 for (seconds). That is, the timer circuit 32 is configured to be activated each time a match signal is input, and to time up when a certain time has elapsed since the match signal was not input. It should be noted that it is convenient to add a code error correction detection function to the reception unit 26 of the vehicle-mounted device 4 so that the unlock signal can be received more reliably.

In the above configuration, when the loading device door 2 of the truck 1 is unlocked and locked by the portable device 9, the ID code set in advance by the code setting unit 28 of the vehicle-mounted device 4 is
It is set in advance so as to match the ID code generated by the code generator 14 of the portable device 9.

When the worker 8 carrying the portable device 9 approaches the truck 1 for loading and unloading luggage, the walking vibration detector 22 detects the vibration of the portable device 9 caused by the worker 8 walking. Each time the detection output from the walking vibration detection unit 22 is input, the timer circuit 24 holds the power supply unit 18 in the ON state for a predetermined time (for example, 6 seconds) in response to the input. As a result, the trigger signal is intermittently output from the intermittent oscillation circuit 10 in a constant cycle (here, every one second). Therefore, in this example, the trigger signal is output six times during the period when the power supply unit 18 is turned on. Each time these trigger signals are input, the transmission unit 16 converts the ID code from the code generation unit 14 into serial data for transmission, and then performs AM, FM modulation, etc., which is used as an unlock signal. Radio waves are transmitted from the transmitting antenna 18.

Then, the worker 8 loads the cargo bed door 2 of the truck 1.
When the unlocking signal from the portable device 9 is received by the receiving antenna 5 of the in-vehicle device 4, the unlocking signal received by the receiving unit 26 of the in-vehicle device 4 becomes ID code data. The ID code is demodulated and compared with the preset ID code in the code setting section 28 in the code comparing section 30 in the next stage. The code comparison unit 30 outputs a match signal when both ID codes match, and the timer circuit 26
Is operated by this coincidence signal and outputs an unlocking operation signal to the lock unit 3 for a certain period (for example, 30 seconds). By this unlocking operation signal, the luggage carrier door 2
Is held in the unlocked state.

When the worker 8 moves away from the truck 1 and the radio wave transmitted from the portable unit 9 is out of the range received by the receiving antenna 5 of the vehicle unit 4, the unlock signal from the portable unit 9 is released. Is not received by the vehicle-mounted device 4, there is no match signal output from the code comparison unit 30 on the vehicle-mounted device 4,
Therefore, the timer circuit 32 times up when a fixed time (for example, 30 seconds) elapses after the coincidence signal is not input. Therefore, the loading unit door 2 is locked by the lock unit 3.

As described above, when the worker 8 carrying the portable device 9 approaches the truck 1, the luggage carrier door 2 is automatically unlocked, and when the worker 8 moves away from the truck 1, the luggage carrier door 2 is automatically locked. Therefore, the labor for unlocking and locking can be saved.

Further, in a state where the worker 8 is not walking, such as driving the truck 1, even if the worker 8 carries the portable device 9, the walking vibration detecting section 22
Does not output a walking vibration detection signal. For this reason,
Since the power supply unit 18 is kept in the off state and the unlock signal is not transmitted from the transmission unit 16, the power consumption of the power supply unit 18 is not wasted.

Moreover, when the worker 8 is separated from the truck 1 or when the truck 1 is being driven, the locked state of the luggage carrier door 2 by the lock unit 3 is reliably maintained, so that the luggage carrier door 2 is locked. 2 is convenient because it will not be unlocked unexpectedly.

[0028]

In the device according to the present invention, the carrier door is automatically unlocked when a worker carrying a portable device approaches the truck, and the carrier door is automatically locked when the worker moves away from the truck. Therefore, even when both hands are closed for loading and unloading the luggage, the luggage carrier door can be unlocked and locked.

In addition, an operator drives a truck,
Since the unlock signal is not output from the portable device when the user is not walking, there is no unnecessary power consumption of the portable device.Therefore, when the battery is used as the power source, the battery life becomes long and Can be used.

In addition, even if the worker is driving a truck or forgets to leave the portable device in the driver's seat,
Since the luggage carrier door is securely locked, there is no inconvenience that the luggage carrier door is unexpectedly unlocked.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an installed state of a remote lock device for a truck bed door according to an embodiment of the present invention.

FIG. 2 is a block diagram of a portable device according to an embodiment of the present invention.

FIG. 3 is a block diagram of an in-vehicle device according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Truck, 2 ... Luggage door, 3 ... Lock unit, 4 ...
In-vehicle device, 8 ... Worker, 9 ... Portable device, 16 ... Transmission unit, 18
... Power supply unit, 22 ... Walking vibration detection unit, 24 ... Timer circuit.

Claims (1)

[Claims] 1. A portable device carried by an operator, a lock unit mounted together with a truck, and a vehicle-mounted device, wherein the portable device transmits an unlocking signal for unlocking a luggage carrier door of the truck. The unit locks and unlocks the luggage carrier door, and the in-vehicle device receives the unlock signal from the portable device, and unlocks the lock unit in response to the unlock signal to output the unlock signal. When not accepting, the locked state is held, in the truck bed remote lock device, the portable device includes a transmission unit that transmits an unlocking signal and a power supply unit that supplies transmission power to the transmission unit. A walking vibration detection unit that detects the presence or absence of walking vibration and a timer circuit that holds the power supply unit in an ON state for a predetermined time in response to a walking vibration detection output from the walking vibration detection unit. Remote lock apparatus for a truck bed door, characterized in Mukoto.