JPH0127828B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a remote engine stop device suitable for work sites where engine welders or power generation welders (hereinafter referred to as working machines) are used.

Prior Art and Problems Work equipment has a structure that makes it impossible to stop the diesel engine by remote control. Therefore, at work sites where work equipment is used (for example, bridge construction sites, high-rise steel construction sites, etc., where the work equipment and workers are working far apart), it is important that workers who are working far away from the work equipment Workers must go back and forth between the work equipment and the work site to operate the work equipment whenever necessary. It is not at all desirable to perform work while operating the work machine in this manner, as it is not only inefficient but also carries the risk of performing the work incorrectly.

The present invention has been made in view of the above-mentioned problems, and allows a worker who is working in a place far away from the work machine to work while remaining at the work place without having to go back and forth between the work machine and the work place. The purpose is to propose a convenient remote engine stop device that can remotely control the aircraft.

Means for Solving the Problems The means taken by the present invention to achieve the above object are as follows: B contact X1 connected to the pole of battery B
₁ and X1 ₂ are connected to the base metal 8 and the A contact X0 ₁ of the relay sensor that detects
Connect the coil of CRX, connect the A contact of this sensor to the coil and battery _pole of relay X0, connect _the B contact of the relay X1 to the A contact of the relay X0 ₂ is connected to the A contact t of a timer T that operates for a limited time when the engine shifts from high speed to low speed, and the A contact is connected to the A contact of a timer T ₂ that operates within the set time limit of the timer T. This A contact is connected to the set coil 2B of the keep relay 2 that keeps the engine stop signal, and the A contact _2.2 of the keep relay is connected to the coil of the relay X5 that activates the decompression 3 to stop the engine. It means that it will become.

Effect Immediately stopping the engine after continuous high-speed work is undesirable because it will cause the engine to overheat. Therefore, first of all, it is necessary to make the speed lower than the high speed. To do this, the welding rod 7 held by the holder 6 is welded to the base material 8. Due to the welding, the A contact of sensor CRX is closed,
Since the B contact _X03 of relay X0 is opened, the B contact of relay X2 is closed. Next, by welding, the voltage of the captire cable 4 (more specifically, captire cables 4A and 4B) is 84V→24V→→
Since it becomes 0V, the B contact of relay X1 X1 ₁ , X1 ₂
is closed, the voltage of the battery is applied to the coil of timer _T1 , and the circuit is set. After the timer expires (about 2 seconds), the voltage of the battery passes through relay X1, timer _T1 , and solenoid _SR2.
is activated to shift the engine 9 to low speed.
Next, pass through B contact X1 ₂ of relay X1 and relay X0
The voltage that reaches the A contact _t of the timer T through the A contact When the A contact t closes, the coil of timer _T2 is energized,
Timer T ₂ starts before the set time limit seconds of timer T elapses.
The A contact of timer _T2 closes after the set time limit seconds (approximately 2 seconds). When timer T 2 is set for approximately 2 seconds before timer T's set time limit seconds (approximately 5 seconds) have elapsed, timer _{T 2 's} A contact closes and the next keep relay 2 is set, and A contact 2 is set.・The voltage passing through ₁ flows to the coil of the next timer T ₃ , and after a timed number of seconds, the A contact closes, and the voltage flows to the reset coil 2A of keep relay 2, but keep relay 2
The voltage passing through A contacts 2 and ₂ flows to the coil of relay X5, and when the A contacts close, the decompressor 3 is pulled and the engine is stopped.

Example The drawings will be explained.

Relay X1 is a member used for energizing the welding rod 7 and base metal 8 during no-voltage 0V during welding of the welding rod 7, and includes a coil and two B contacts X1 ₁ ,
This is a normal configuration with X1 ₂ . Relay X1 is
The coils are respectively connected to the welding rod side cable 4B via the base material side cable 4A of the captire cable 4 and the A contact X0 ₁ of the relay X0, and the two B contacts X1 ₁ and X1 ₂ are connected to the poles of the battery. ,
One B contact X1 ₁ is connected to the A contact of the timer T ₁ , and the other B contact X1 ₂ is connected to the A contact X0 ₂ of the relay X0, and by welding them to the base metal 8 of the welding rod 7, both When the voltage between them reaches 0V, the two B contacts X1 ₁ and X1 ₂ are closed and the battery voltage is applied. Relay X0
is for amplifying the sensor CRX provided on the welding rod side cable 4B of the captire cable 4, and includes a coil, two A contacts X0 ₁ , X0 ₂ and 1
This is a normal configuration having two B contacts _X03 . Relay X0 has one A contact X0 ₁ connected to welding rod side cable 4B and the coil of relay X1, and the other A contact X0 ₂ connected to B of relay X1.
Connect to contact X1 ₂ and connect to A contact t of timer T, further connect the coil to the intermediate part between sensor CRX and relay 4, and connect B contact X0 ₃
Connect to the battery pole and the coil of relay X2. Relay X0 is activated by the voltage from the battery through the A contact of sensor CRX, which opens and closes depending on the welding load, and A contact X0 ₁ is activated by the voltage from the battery.
The relay X1, which is activated by the voltage fluctuation between the welding rod 7 and the base metal 8, is activated, and the A contact X0 ₂ transfers the battery voltage that has passed through the B contact X1 ₂ of the relay X1 to the A contact t of the timer T, and the timer The A contact of _T2 is subsequently energized, and the B contact _X03 is
Apply battery voltage to the coil of relay X2 to activate the B contact. Sensor CRX is
This is a sensor for sensing the welding load, and consists of a coil and a current relay with an A contact.The coil is connected to the welding rod side cable 4B of the captire cable 4, and the A contact is connected to the battery pole and the relay. The B contact of X4 is connected to the coil of relay X0, and when the welding load is detected, voltage from the battery is applied to the coil of relay X0. Timer T is a timer that operates for a fixed number of seconds (approximately 5 seconds) only when the engine 9 shifts from high speed to low speed. Product Name: Futo News Timer Format
ATP2P type), the coil is generated by a generator
Using 100V voltage, connect A contact t to A of relay X0.
Connect to contact X0 ₂ , A contact of timer T ₂ , and coil of relay X4. Timer T has A contact t
However, the B contact X1 ₂ of relay X1 and the A contact of relay X0
The voltage of _the battery that has passed through contact X0 ₂ is applied to _the coil of relay 2
Set coil 2B. Timer T
It is necessary to control the four operations of the engine 9, starting, high speed, low speed, and stopping, by welding, which has a common operation only by distinguishing the length of time. As a reference point, a certain time period (approximately 5
seconds), and a timer is set before the set time period elapses.
Activate _T2 for the set time limit seconds (approximately 2 seconds) and set the set coil 2B of keep relay 2. The timer _T2 is a timer for welding and connecting the welding rod 7 (approximately 2 seconds) until the engine 9, which has shifted to a low speed, is stopped, and is a well-known timer consisting of an A contact and a coil. Timer T ₂ has coil and A
The contact is connected to the A contact t of the timer T and the coil of the relay Timer T ₂ starts within the set time limit of Timer T (within approximately 5 seconds)
Set coil 2B of keep relay 2 is set after the set time limit of seconds (approximately 2 seconds). Keep relay 2 is a relay for keeping the engine stop signal, and includes a set coil 2B that receives a welding duration signal (approximately 2 seconds) from timer _T2 , a reset coil 2A for resetting, and two A contacts 2. It is a normal relay consisting of ・₁ , 2, and ₂ . In the keep relay 2, the set coil 2B is connected to the A contact of the timer _T2 , and the reset coil 2B is connected to the A contact of the timer T2.
A is connected to the A contact of timer T ₃ , A contact _2.1 is connected to the battery pole and the coil of timer T ₃ , and A contact _2.2 is connected to the battery pole and relay X.
5 coils, respectively. Keep relay 2
Since the voltage generated by the generator becomes weaker and weaker after the engine 9 shifts to low speed, the engine stop signal (approximately 2 seconds) is fixed to the set coil 2B so that it is not possible to continue pulling the decompressor 3 to stop the engine for a long time. Set the target. Therefore, the two A contacts _2.1 and _2.2 of the keep relay 2 are closed, and one of the A contacts _2.1 energizes the coil of the timer T ₃ to operate the timer, and the time limit of the timer T ₃ is set. A few seconds later
The contact is closed, but the other A contact _2.2 energizes the coil of relay X5 for stopping the engine, closing the A contact, pulling the decompressor 3, and stopping the engine 9. Relay X5 is a relay that activates decompressor 3 to stop the engine, and is a normal relay DC having a coil and an A contact. relay x5
Connect the coil to the A contacts 2 and ₂ of the keep relay 2, and connect the A contacts to the battery poles and the decompressor 3. When the coil is energized, the A contact closes, and the decompressor 3 is pulled. Stop the engine. In addition, since the power consumption of the decompressor 3 is large, the relay X5 is used as a coupling, and a power relay with a larger capacity is used. Timer _T3 is a timer for resetting the keep relay 2, returning the decompression 3 to its original state, and starting the engine.It is a normal timer with a coil and an A contact, and the coil is connected to the A contact 2 of the keep relay 2. ₁ , connect the A contact to the battery pole and the reset coil 2 of the keep relay 2.
Connect to A. To stop the engine, a certain time period is required for the piston to completely stop after the engine stops. Therefore, the timer _T3 is set to a number of seconds that takes into account that time period, and the time period is set to After several seconds have elapsed, battery voltage is applied to the reset coil 2A of the keep relay 2 to open the two A contacts _2.1 and _2.2 , the decompressor 3 is returned to its original state, and the engine 9 is started at low speed. do. Timer _T1 is a timer DC used to distinguish between normal welding and welding for stopping the engine.The coil is connected to the B contact of relay X1 and the B contact of relay _X2, respectively, and the A contact is connected to the B contact of relay X1. Connect to B contact X1 ₁ of relay X1, solenoid SR ₂ , and coil of relay X3. By setting the timer _T1 to about 2 seconds, the solenoid _SR2 is operated thereafter to shift the engine 9 from high speed to low speed.

In the figure, reference numeral 1 denotes an operating section, and its configuration is such that a lever 1C that responds to the operation of a solenoid SR ₁ is connected to the lower end of a steel rod 1B that is slidably fitted into a steel pipe 1A. The stopper 1D provided on the side wall of the steel pipe 1A is configured to always act on the steel rod side by a spring 1E, and is connected to one solenoid _SR2 . Therefore, as described above, when the steel rod 1B is pulled by the solenoid SR ₁ , the notch 1 carved in the steel rod 1B is
It will move until the stopper stops at B'. Now we can begin the welding process. At this time, a micro switch cuts off the circuit to solenoid SR ₁ .
LS is configured to operate. When the welding work is finished and the engine is to be slowed down, the contacts of relay X1 create a circuit by grounding the welding rod 7, activating solenoid SR ₂ through timer T ₁ , and pressing the stopper against the spring. All you have to do is release the lock. 1F is the wire to the engine throttle. 4 is a captire cable, 4A is a base material side cable, 4B is a welding rod side cable, and 5 is an engine key.

Next, engine stop will be explained.

It is not preferable to stop the engine immediately after continuous high-speed work because this will cause the engine 9 to heat up. Therefore, it is necessary to change the speed of the engine 9 from high speed to low speed. To do this, the welding rod 7 held by the holder 6 is welded to the base material 8. From that, the A contact of sensor CRX is closed and relay
Since the B contact _X03 of relay X2 is opened, the B contact of relay _X2 is closed. Next, by welding the welding rod 7, the captire cable 4 (more specifically, the base material side cable 4
The voltage between A and welding rod side cable 4B) is 84V → 24V
→Since it becomes 0V, B contact X1 ₁ ,X of relay X1
1 ₂ is closed, the voltage of the battery is applied to the coil of timer T ₁ to set the circuit, and after the timer's time limit (approximately 2 seconds), the voltage of the battery passes through relay X 1 and timer T _1. , the solenoid SR ₂ is activated and the stopper 1D is removed against the spring 1E, so that the steel rod 1B is returned to its original state by the lever 1C of the solenoid SR ₁ , and the lever returns to a low speed. Also, relay X3
is for blocking solenoid SR ₁ during that time. The engine 9 will be stopped after it has cooled down at low speed for a while, but first the welding rod 7 is welded, and the voltage passing through the sensor CRX and the B contact of the relay X4 will cause the solenoid to
The engine 9 becomes high speed due to SR ₁ , but by continuing the welded state, the engine 9 is moved to low speed due to the solenoid SR ₂ as described above. Next, the voltage that passes through B contact X1 ₂ of relay X1, passes through A contact X0 ₂ of relay X0, and reaches A contact t of timer T is 100 V
Simultaneously with the sign of a sudden voltage drop due to the low speed of the coil generator, the coil operates for a timed number of seconds (approximately 5 seconds) and the A contact t closes, energizing the coil of timer _T2 , and the timer T is set for the set timed number of seconds. (approximately 5 seconds) before the timer T ₂ 's set time limit seconds (approximately 2 seconds) have elapsed, the A contact of timer T ₂ closes. If welding is stopped within 2 seconds, the voltage will not pass through the timer _T2 , so the engine 9 will not stop and will continue to operate at low speed. Passing the B contact X1 ₂ of the relay X1 and the A contact X0 ₂ of the X0 up to the timer T is for the relays to alternately provide barriers and cut off the voltage except when necessary. In other words, the contact point changes with changes from 84V (during high speed), 24V (during welding), and 0V (during welding). That is, the voltage is passed only when the last weld is made, and the voltage is turned off when the speed changes from low speed to high speed using the timer T, and is set only when changing from high speed to low speed (100V→0V). Therefore, the voltage that flows through the above-mentioned timer T until the set time limit (approximately 5 seconds) is used to block the operation of solenoid _SR1 during the stop operation using relay X4, and perform the exact same operation called welding. The solenoid returns to speed up again, which is opposite to the purpose of stopping.
The rise due to SR ₁ is prevented. Unlike when speeding up, in the stage from low speed to stop, the voltage generated from the generator, which is the signal source, from 84V to 24V to 0V gradually decreases, so the function of sensor CRX that activates relay X0 also lasts for a long time. It doesn't last and you can't reach your goal. Therefore,
At the final stage, when there is still some life left, a momentary signal is transmitted to keep relay ₂ through timer T 2, and the voltage generated by engine rotation is cut off. To summarize the situation before and after the welding state lasts for 2 seconds, at high speed, if it is within 2 seconds, the engine 9 will not slow down and the 2 seconds will continue.
After seconds, the speed will shift to low speed (by timer T ₁ ), and if it continues as it is, timer T will touch the baton to timer T ₂ at the sign of voltage drop, and it will remain at low speed for less than 2 seconds after the baton is touched. If it continues longer than that, the keep relay 2 is set, and the decompression 3 is activated to stop the operation. This is an important point that determines whether to speed up or stop even if the same operation is used to sustain welding. When timer T ₂ is set for approximately 2 seconds, the A contact of timer T ₂ closes, energizing the set coil 2B of keep relay 2, and the voltage applied through A contacts 2 and ₁ is applied to the coil of timer T _3. After being energized, the timer A contact closes after a number of timed seconds, and the voltage flows to the reset coil 2A of the keep relay 2, but the voltage that passes through the A contacts 2 and ₂ of the keep relay 2 flows to the coil of relay X5, and the A contact When the is closed, decompression 3 is pulled and engine 9 is stopped (if the engine does not use decompression, just turn off the key switch). When the timer _T3 expires, the reset coil 2A of the keep relay 2 is activated, the A contacts _2.1 and _2.2 are cut off, and the decompressor 3 returns to its original state.

Effects of the Invention As is clear from the above description, the present invention allows a worker who is working at a place far away from a work machine to stop the engine without having to go back and forth between the work machine and the work place. By simply welding the welding rod to the base metal, the work equipment can be remotely controlled and stopped without leaving the work area. Then,
To provide a convenient remote engine stop device that eliminates the necessity of erroneous work and allows work to proceed efficiently.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the stopping device of the present invention, and FIG. 2 is a wiring diagram. In the figure, X1, X0, X5... Relay, 6... Welding rod holder, 8... Base metal, CRX... Sensor, T, T ₂ ... Timer, 2... Keep relay,
3...Decompression, 9...Engine.

Claims (1)

[Claims] 1 B contact X1 connected to the pole of battery B
₁ , X1 ₂ is connected to the base material 8
and A contact X0 _{1 of} relay X0 having A contacts _{X0 1} , Connect the coil of a sensor CRX that detects the welding load to the welding rod holder 6, connect the A contact of this sensor to the coil and battery pole of the relay X0, and connect the A contact of the relay X0 ₂ to the A contact of the relay X1. Connect the B contact X1 ₂ , and connect the A contact X0 ₂ of the relay Connect this A contact to the A contact of the timer T ₂ which operates _at
Connect 2 and ₂ to the battery poles respectively, and
A remote engine stop device in which the A contact _2.2 is connected to the coil of a relay X5 that activates a decompressor 3 for stopping the engine, and the A contact of the relay is connected to a battery pole.