JP6588226B2 - Engine starter for work vehicle - Google Patents

Description

  The present invention relates to a work vehicle engine starter provided in a work vehicle such as a tractor.

  In recent years, vehicles such as automobiles are equipped with functions such as an immobilizer, a smart key, and a keyless entry as functions related to an engine start key. The immobilizer makes it difficult to start the engine with a counterfeit key by performing automatic authentication with the engine start key when starting the engine (see, for example, Patent Document 1). In addition, the smart key automatically authenticates wirelessly with the engine start key, thereby eliminating the need to take out the engine start key and improving convenience when getting on and off and starting the engine. In addition, the keyless entry improves the convenience of getting on and off by allowing the door to be locked and unlocked by operating a transmission button provided on the engine start key.

JP-A-8-86130

  By the way, in the work vehicles such as tractors, introduction of immobilizers and smart keys is being studied in order to prevent theft. However, there is a problem that the introduction of immobilizers and smart keys results in a significant cost increase. Even if an immobilizer or smart key is introduced, anyone can start the engine as long as it has a regular engine start key, so strict management of the engine start key is required.

  An engine start key with a transmission button used for a keyless entry and a receiving unit for receiving an authentication signal transmitted from the engine start key are relatively inexpensive. The cost is increased, and it is difficult to introduce a work vehicle without a door.

The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 is an engine starter for a work vehicle, comprising an engine start key, An engine start switch that is turned on in response to the turning operation of the inserted engine start key, and an engine start control unit that starts the engine in response to turning on of the engine start switch. A key unit that extends from the head and is inserted into the engine start switch, a transmission button provided on the head, and a transmission unit that transmits a unique authentication signal according to the operation of the transmission button, wherein the engine starting control section includes a reception unit that receives the authentication signal, Do not receive the authentication signal which the receiving section in accordance with depression of the transmission button La the engine start key is turned ON an engine starting system for a work vehicle, characterized in that the engine is started when the engine start switch is turned turned ON.
According to a second aspect of the present invention, there is provided the work vehicle engine starter according to the first aspect, wherein the engine start control unit notifies the start of the engine to the outside of the vehicle when the engine is started.
The invention according to claim 3 is the engine start device for a work vehicle according to claim 1 or 2, wherein the engine start control unit turns on the engine start switch without receiving the authentication signal. In this case, an erroneous operation of starting the engine is notified to the outside of the vehicle.

According to the first aspect of the present invention, when the engine is started, not only the operation of turning the engine start key (ON operation of the engine start switch) but also the transmission button operation of the engine start key is requested. However, those who do not know the operation of the transmission button are difficult to start the engine, and the crime prevention can be improved. In addition, an engine start key with a transmission button and a receiving unit that receives an authentication signal transmitted from the engine start key are widely used for keyless entry, and can be implemented at low cost.
According to the invention of claim 2, since the engine start is notified outside the vehicle at the time of engine start, when there is another worker around the vehicle, the worker is alerted to improve safety. be able to.
According to the invention of claim 3, when the engine start switch is turned on without receiving the authentication signal, an erroneous operation of starting the engine is notified to the outside of the vehicle, so that the crime prevention can be further improved.

It is a side view of a tractor. It is a front view of an operation panel part. It is a perspective view of an operation panel part. It is explanatory drawing of the engine starting apparatus which shows before an engine start. It is explanatory drawing of the engine starting apparatus which shows the time of engine starting normal operation. It is explanatory drawing of the engine starting apparatus which shows the time of engine starting erroneous operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling machine body of a tractor that is a work vehicle. The traveling machine body 1 includes an engine mounting portion 2 on which an engine (not shown) is mounted, a transmission case 3 that changes engine power, A front wheel 4 and a rear wheel 5 driven by traveling power output from the mission case 3, a work machine connection unit 6 capable of connecting various work machines (not shown), and a control unit 7 on which an operator gets on. I have.

  The control unit 7 of the present embodiment is covered with a cabin 8, and a driver's seat (not shown) where an operator sits, and a driver panel 9 in which various operation tools and display tools are incorporated are arranged. ing. The driving panel 9 of the present embodiment incorporates a steering handle 10 for steering the front wheels 4, a meter panel 11 for displaying various states, an engine start switch 12 for starting the engine, and the like. By performing the starting operation, the traveling operation and the working operation of the tractor can be performed.

  As shown in FIGS. 4 to 6, the traveling machine body 1 is provided with an engine starter 13 (engine starter for a working vehicle) that starts the engine in response to an operation of the engine start switch 12. The engine starter 13 includes an engine start key 14, an engine start control unit 15, a starter 16 and the like in addition to the engine start switch 12 described above.

  The engine start switch 12 includes a keyhole (not shown) into which the engine start key 14 is inserted, a battery terminal BAT connected to the battery 17, and a battery according to a turning operation (ON operation) of the inserted engine start key 14. There are provided an ignition terminal IG1 and a starter terminal ST which are electrically connected to the terminal BAT.

  The engine start key 14 includes a head portion 18, a key portion 19 that extends from the head portion 18 and is inserted into the engine start switch 12, a transmission button 20 a provided on the head portion 18, and a head portion 18. A transmitter 20 that transmits a unique authentication signal in response to an operation of 20a and a battery (not shown) that supplies power to the transmitter 20 are provided. In the present embodiment, the transmitter 20 is used for a keyless entry of an automobile. The engine start key with the send button is used.

  The engine start control unit 15 includes a receiving unit 21, a holding relay 22, and a start relay 23. The receiving unit 21 operates by supplying power from the power terminals 21a and 21b, and receives a authentication circuit that receives the authentication signal transmitted from the engine start key 14, and outputs a signal when the received authentication signal is a normal authentication signal. And a signal output circuit that outputs signals from the terminals 21c and 21d. In this embodiment, a receiving unit used for a keyless entry of an automobile is used. The ignition terminal IG1 of the engine start switch 12 is connected to the positive power terminal 21a, the ground is connected to the negative power terminal 21b, and the holding relay 22 is connected to the signal output terminals 21c and 21d. The coil 22a, the buzzer 24, and the LED 25 are connected in parallel. The buzzer 24 is used to notify the engine start to the outside of the vehicle, and the LED 25 is used to notify the operator of the engine start lock release state accompanying the reception of the authentication signal.

  The holding relay 22 is an electromagnetic relay having a c contact, a pair of coil terminals 22b and 22c conducted to the coil 22a, a movable contact terminal 22e conducted to the movable contact 22d, and a conducted to the a contact 22f. A contact terminal 22g and a b contact terminal 22i connected to the b contact 22h are provided. The coil terminals 22b and 22c are connected to the signal output terminals 21c and 21d of the receiver 21, the movable contact terminal 22e is connected to the ignition terminal IG1 of the engine start switch 12, and the a contact terminal 22g is connected to the a contact terminal 22g. A plus side coil terminal 22b (plus side of the LED 25) is connected, and a coil 23a of the start relay 23 is connected to the b contact terminal 22i. That is, when the holding relay 22 is turned on, a current flows from the ignition terminal IG1 of the engine start switch 12 to the plus side coil terminal 22b without going through the receiving unit 21, so that the holding relay 22 is turned on by itself. . At this time, the lighting of the LED 25 is also self-held, but since the diode D is interposed between the buzzer 24 and the LED 25, the ON of the buzzer 24 is not self-held.

  The start relay 23 is an electromagnetic relay having a c contact, a pair of coil terminals 23b and 23c conducted to the coil 23a, a movable contact terminal 23e conducted to the movable contact 23d, and a connected to the a contact 23f. A contact terminal 23g and a b contact terminal 23i connected to the b contact 23h are provided. The b contact terminal 22i of the holding relay 22 is connected to one coil terminal 23b, the ground is connected to the other coil terminal 23c, and the starter terminal ST of the engine start switch 12 is connected to the movable contact terminal 23e. The horn 26 and the lamp 27 are connected in parallel to the a contact terminal 23g, and the starter 16 is connected to the b contact terminal 23i. Note that the horn 26 and the lamp 27 are used to notify an engine start erroneous operation to the outside of the vehicle.

  Next, the operation of the engine starter 13 according to the embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 4, in a state where the engine start key 14 is not inserted into the engine start switch 12, power is not supplied to the engine start control unit 15, so the engine starter 13 does not operate.

  As shown in FIG. 5, in the engine starter 13 according to the embodiment of the present invention, the engine start key 14 is inserted into the engine start switch 12 and is turned (ON operation) while pressing the transmission button 20 a of the engine start key 14. To start the engine. When the engine start switch 12 is turned and operated, the battery terminal BAT of the engine start switch 12 is electrically connected to the ignition terminal IG1 and the starter terminal ST, and power is supplied from the battery 17 to the engine start control unit 15. The receiving unit 21 receives the authentication signal transmitted from the engine start key 14, and outputs a signal from the signal output terminals 21c and 21d when the authentication signal is a regular authentication signal. Accordingly, the buzzer 24 is operated to notify the engine start to the outside of the vehicle, and the LED 25 is lit to notify the operator of the engine start lock release state. Further, since the holding relay 22 is turned on, the holding relay 22 is turned on and the LED 25 is turned on, and the start relay 23 is kept off. When the engine start switch 12 is turned on while the start relay 23 is OFF, the battery terminal BAT of the engine start switch 12 is electrically connected to the starter terminal ST, and from the battery 17 through the b contact 23h of the start relay 23. Power is supplied to the starter 16. Thereby, the starter 16 operates and the engine is started.

  On the other hand, as shown in FIG. 6, when the engine start switch 12 is operated without turning on the transmission button 20 a of the engine start key 14 (ON operation), the receiving unit 21 does not receive the authentication signal. The signal output from 21c and 21d is not performed, and the holding relay 22 maintains the OFF state. When the holding relay 22 is OFF, since a current flows from the engine start switch 12 to the coil 23a of the starting relay 23 via the holding relay 22, the starting relay 23 is turned ON. In this state, the current flowing from the engine start switch 12 to the movable contact terminal 23e of the start relay 23 does not flow to the starter 16, but flows to the horn 26 and the lamp 27 via the a contact 23f. As a result, the horn 26 and the lamp 27 are operated, and an erroneous operation of starting the engine is notified outside the vehicle.

  According to the present embodiment configured as described, the engine starter 13 for a work vehicle is an engine start switch that is turned on in response to a rotation operation of the engine start key 14 and the inserted engine start key 14. 12 and an engine start control unit 15 that starts the engine in response to turning on of the engine start switch 12. The engine start key 14 extends from the head 18 and the head 18 and is inserted into the engine start switch 12. The key unit 19, the transmission button 20 a provided on the head 18, and the transmission unit 20 that transmits a unique authentication signal in response to the operation of the transmission button 20 a. A receiving unit 21 is provided for receiving the authentication signal and starting the engine when the engine start switch 12 is turned ON.That is, when starting the engine, not only the rotation operation of the engine start key 14 (ON operation of the engine start switch 12) but also the transmission button operation of the engine start key 14 is requested, so even if the engine start key 14 is possessed, A person who does not know the operation of the transmission button makes it difficult to start the engine and can improve crime prevention.

  In addition, the engine start key 14 with a transmission button and the reception unit 21 (reception unit) that receives the authentication signal transmitted from the engine start key 14 are widely used for keyless entry, so the cost is low. Implementation becomes possible.

  Further, in this embodiment, when the engine is started, the engine start is notified to the outside of the vehicle (the operation of the buzzer 24). Therefore, when there are other workers around the vehicle, the operator is alerted and safety is increased. Can be improved.

  Further, in this embodiment, when the engine start switch 12 is turned on without receiving the authentication signal, an erroneous operation of starting the engine is notified to the outside of the vehicle (operation of the horn 26 and the lamp 27), so that the crime prevention is further improved. Is possible.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 7 Control part 9 Operation panel 12 Engine start switch 13 Engine starter 14 Engine start key 15 Engine start control part 16 Starter 17 Battery 18 Head 19 Key part 20 Transmission part 20a Transmission button 21 Reception part 22 Holding relay 23 Start Relay 24 Buzzer 25 LED
26 Horn 27 Lamp

Claims (3)

An engine starter for a work vehicle,
An engine start key,
An engine start switch that is turned on in response to a turning operation of the inserted engine start key;
An engine start control unit that starts the engine in response to turning on of the engine start switch,
The engine start key is
The head,
A key portion extending from the head and inserted into the engine start switch;
A send button provided on the head;
A transmission unit that transmits a unique authentication signal in response to an operation of the transmission button,
The engine start control unit includes a receiving unit that receives the authentication signal, and the engine start key is turned on while the receiving unit receives an authentication signal corresponding to a pressing operation of the transmission button, and an engine start switch An engine starter for a work vehicle, wherein the engine is started when is turned on.   The engine start control device for a work vehicle according to claim 1, wherein the engine start control unit notifies the engine start to the outside of the vehicle when the engine is started.   3. The work vehicle according to claim 1, wherein the engine start control unit notifies an engine start erroneous operation to the outside of the vehicle when the engine start switch is turned on without receiving the authentication signal. Engine starter.

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