JPH0357320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation display device for an engine pump, and more specifically, a device for displaying the operation of an engine pump used in a water cannon pump for firefighting, etc., for lighting up and displaying each operation step from a state ready for operation to a state ready for water discharge. Concerning what has been done.

A known engine pump as described above is equipped with an engine-driven water pump and a vacuum pump that sucks water into the water pump, and the water pump discharges water after the vacuum pump completes water suction. Such engine pumps are widely used as portable fire pumps. By the way, when looking at the environment in which such engine pumps are used, that is, firefighting sites, not only speedy work is required due to emergencies, but also reliability of work is required. In this case, conventionally, workers relied on the operating sounds of the vacuum pump, water pump, engine, etc., to check each step of operation from the engine pump's ready state to the water-spraying state, and then performed the operations up to the water-spraying stage. In fact, it is difficult to hear the operating sound of the engine pump at a noisy firefighting site, so it is difficult to expect people who are inexperienced in handling each step from discharging water quickly and reliably. There was a problem.

The present invention has been made to solve the above problem, and provides an engine pump operation display device that allows even a person who is inexperienced in handling engine pumps to quickly and reliably perform each step of the process up to water discharging. The purpose is to

For this purpose, the present invention provides an engine pump as described above, which includes a detection means having a main switch of the engine pump, an engine rotation detection sensor, a vacuum pump operation detection sensor, and a water absorption completion sensor; A monitor circuit that processes the output signals from the engine to display at least the engine pump's preparation, startup, water intake, and water discharge steps in chronological order and selectively by lighting, and the output of this monitor circuit that operates the engine pump. It is characterized by comprising a monitor panel that displays each operating step from a ready state to a state in which water can be sprayed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be specifically described below based on an embodiment shown in the drawings.

FIG. 1 shows an engine pump 1 to which the present invention is applied.
This figure shows the overall schematic configuration of the engine 3, which is equipped with an engine 3 installed on an underframe 2, a water pump 4 and a vacuum pump 5 assembled to the engine 3, and the water pump 4 is directly connected to an output shaft (not shown) of the engine 3. At the same time, the vacuum pump 5 is configured to be transmitted to the output shaft via a belt transmission mechanism to be described later. When the vacuum pump 5 is first activated by the drive of the engine 3, the air in the water pump 4 is Water is sucked in while being drained, and then water is discharged by the water pump 4. In FIG. 1, reference numeral 6 is a battery of the engine pump 1, 7 is a starter motor for starting the engine 3 which is supplied with power from the battery 6, 8 is a fuel tank disposed above the engine 3, and 9 is an oil tank.

The engine 3 also includes a main switch 10 that switches the engine 3 between on/off and start operation modes as shown in FIG. 11, and in addition to this magneto 11, a detection magnet 12 as a sensor for detecting engine rotation is attached. The detection magnet 12 also functions as a charger for the battery 6 and a dynamo for lighting a searchlight or the like. Furthermore, the water pump 4 is provided with a pressure switch 13 as a water suction completion detection sensor that is turned on by the pressure of water lifted by the water suction action of the vacuum pump 5. In addition, a tension clutch 15 that connects and disconnects the belt transmission mechanism 14 for driving the vacuum pump 5 is provided so as to be engaged and operated based on the connection operation of the operating lever 16 that connects and disconnects the belt transmission mechanism 14 for driving the vacuum pump 5. limit switch 1
The limit switch 17 constitutes an operation detection sensor for the vacuum pump 5. These main switch 10, detection magnet 12, pressure switch 13, and limit switch 1
In addition to the operating step detection means for the engine pump 1, which is comprised of 7, a detection means for warning of abnormal operation of the engine 3 and the like is provided. That is, the oil tank 9 is opened and closed by the rotation of the operating lever 16 in synchronization with the engagement and disengagement of the tension clutch 15 in order to lubricate the vane sliding contact portion of the vane-type vacuum pump 5. The oil tank 9 is continuously connected to the vacuum pump 5 via the oil tank 9.
An oil float switch 19 is provided to detect a decrease in oil within the tank. Similarly, the fuel tank 8 is equipped with a fuel float switch 20 that detects a decrease in fuel, and the battery 6 is equipped with a fuel float switch 20 that changes the strength of the output voltage depending on the increase or decrease of the portion immersed in the electrolyte.
Each battery sensor 21 is provided to utilize this to detect the level of the electrolyte.

On the other hand, on the upper side surface of the fuel tank 8, a case 23 is provided which has a monitor panel 22 for displaying the detection results by the detection means constituted by the various switches and the like. As shown in FIG. 3, this monitor panel 22 has four display boards 24 to 27 arranged vertically and horizontally in the center, and four display boards 28 to 27 arranged in a circle surrounding these display boards. 31. And on the four display boards 24 to 27 in the center,
There are monitor marks to indicate battery 6 abnormality, fuel decrease, oil decrease, and engine coolant shortage. Light emitting diodes e to i are arranged respectively. Furthermore, on the four display boards 28 to 31 arranged in a circle around these, the words "Preparation", "Start", "Water Suction", and "Water Discharge" are displayed at the time to indicate each operation step of the engine pump 1. The light emitting diodes a are arranged in series to display each operation step.
.about.d are arranged correspondingly.

Therefore, each of the above light emitting diodes a to i,
In order to display the lighting based on the operation of various switches constituting the detection means, a fourth switch is installed between these.
The circuit shown in the figure is configured.

The symbol M in FIG. 4 represents the eight connection terminals A to H.
This is a monitor circuit formed on a printed circuit board housed in the case 23, and in addition to the monitor circuit M, a lamp L for illuminating an operation panel (not shown) is connected to the printed circuit board. It is connected to terminal C. Here, to explain the connection status of each of the connection terminals A to H and the various switches constituting the detection means, first, the battery 6
is connected to the connection terminal A through a fuse 32, a switch contact 10a that closes when the main switch 10 is in the ON position and the start position, and an overvoltage cut filter 33, and one terminal thereof is connected to the ground side of the filter 33. The power supply voltage is supplied to the monitor circuit M by being connected to the connection terminal B and the monitor circuit M. In addition, the above battery 6
A drive circuit for the starter motor 7 is constructed between the positive terminal and the one terminal, in which the starter motor 7 and a switch contact 10b, which is closed at the start position of the main switch 10, are connected in series. The + terminal side of the battery 6 that has passed through the switch contact 10a is connected to the connection terminal E via the pressure switch 13, and the - terminal side is connected to the connection terminal D via the limit switch 17 via the fuel float switch 20. At terminal G, oil float switch 19
are respectively connected to the connection terminal H via
As a result, a water absorption completion signal by the vacuum pump 5 is sent to the connection terminal E, an operation detection signal of the vacuum pump 5 is sent to the connection terminal D, a fuel decrease detection signal is sent to the connection terminal G, and a decrease in oil is sent to the connection terminal H. The detection signal is
Each of these is being brought to light. Furthermore, the detection magnet 12 is connected to the + terminal of the battery 6 via the diode 34 to perform a charging function, and is connected to the connection terminal C to light the lamp L, and at the same time outputs a voltage as a rotation detection signal of the engine 3. The signal is supplied to a monitor circuit M. Furthermore, the battery sensor 21 is connected to the connection terminal F of the monitor circuit M to provide a signal for detecting a decrease in electrolyte in the battery 6.
Reference numeral 35 in FIG. 4 is a spark plug connected to the magneto 11, and the magneto 11 is short-circuited via the switch contact 10c which closes only when the main switch 10 is in the OFF position.
It is designed to be able to spark at the 0 on or start position.

Next, the monitor circuit M will be explained as follows.
It is equipped with a power supply circuit 36 for lighting each light emitting diode a to i, and this power supply circuit 36 is connected to connection terminals A and B via noise filters 37 and 38, respectively, in order to be connected to the battery 6. The output side is connected to each light emitting diode a to i. Among these light emitting diodes, those indicated by the symbol h are connected to the connection terminal H through a noise filter 39 on their ground side, and those indicated by the symbol g are connected to the connection terminal H through a similar noise filter 40. Its ground side is connected to the connection terminal G, and when the oil float switch 19 is closed, the light emitting diode h is turned on, and the fuel float switch 20 is turned on.
When the light emitting diode g is closed, each light emitting diode g is turned on. Further, the ground sides of the other light emitting diodes a to f and i are connected to a driver circuit, which will be described later.

Here, the monitor circuit M includes the power supply circuit 36
Voltage conversion circuit 4 that operates by being supplied with power from
1. Reference voltage generation circuit 42, two comparison circuits 4
3, 44, voltage detection circuit 45, decoder circuit 4
6 and a driver circuit 47 are provided. The voltage conversion circuit 41 is a noise filter 48
Its input side is connected to the connection terminal C via the sensor, and it inputs the electromotive force of the detection magnet 12 to cut out the overvoltage region, and also converts input voltage fluctuations into corresponding low voltage fluctuations. and output it. Further, the input side of the reference voltage sending circuit 42 is connected to the output side of the power supply circuit 36, and adjusts the voltage supplied from the power supply circuit 36 to a predetermined reference voltage to be supplied to comparison circuits 43 and 44, which will be described later. The comparator circuit 43 has its input side connected to the power supply circuit 36 and the reference voltage generation circuit 42 in order to compare the voltage of the battery 6 outputted from the power supply circuit 36 and the reference voltage outputted from the reference voltage generation circuit 42. and its output side is connected to a driver circuit 47 for light emitting diode f.
When the battery voltage falls below a specified value, it is output to the driver circuit 47. Note that the driver circuit 47 is composed of a set of knot circuits connected to each of the light emitting diodes a to f and i, and when a signal is input to each knot circuit, it lights up the corresponding light emitting diode. When a signal is output from the comparator circuit 43 as described above, the light emitting diode f connected thereto is lit by the action of the knot circuit that receives the signal. Also, the other comparison circuit 4
4 connects its input side to the voltage conversion circuit 41 and a reference in order to compare the reduced output voltage of the magnet 12 output from the voltage conversion circuit 41 and the reference voltage output from the reference voltage generation circuit 42. It is connected to the voltage generation circuit 42, and its output side is connected to the driver circuit 47 via the decoder circuit 46, and while the engine 3 is started and the magneto 12 is generating a predetermined starting power, the decoder circuit 46
It is now output to .

The decoder circuit 46 has a circuit configuration as shown in FIG. 5 with an inverter and a logic gate, and is for selectively lighting up the light emitting diodes a, b, c, and d in time series. One of the sides is connected to the connection terminal C through the comparison circuit 44, and one side is connected to the connection terminal D through the resistor R and the noise filter 49.
One branch is connected between the resistor R and the noise filter 49 and connected to the output side of the power supply circuit 36, and one is connected to the connection terminal E via the noise filter 50. Also, on the output side, light emitting diodes a, b, c,
Driver circuit 4 connected correspondingly to d and i
It is connected to each node circuit of 7. Regarding the light emitting diode a, the signal from the comparison circuit 44 is not inputted because the detection magnet 12 is not operating, and the signal from the power supply circuit 36 is inputted via the resistor R because the limit switch 17 is open. , and the voltage signal of the battery 6 is not input due to the pressure switch 13 not operating. Ru. Regarding the light emitting diode b, the magneto 12 is activated and the signal from the comparator circuit 44 is input, and the operation of the limit switch 17 and the pressure switch 13 is such that the light emitting diode b is activated only when the limit switch 17 and the pressure switch 13 are in the same state as in the case of the light emitting diode a. Corresponding driver circuit 4
The circuit is configured to output to the node circuit No. 7.
Furthermore, regarding the light emitting diode c, among the three lighting conditions for the light emitting diode b, when the limit switch 17 closes the circuit, the signal from the power supply circuit 36 is short-circuited and is not input. Driver circuit 4 corresponding to light emitting diode c under similar conditions
The circuit is configured to output to the node circuit No. 7.
Furthermore, regarding the light emitting diode d, when two conditions are satisfied: the magneto 12 is activated and the signal from the comparison circuit 44 is input, and the pressure switch 13 is activated and the voltage signal of the battery 6 is input, the light emitting diode d is activated. Driver circuit 47 corresponding to
The circuit is configured to output to the node circuit. Here, the light emitting diode i is used to display the presence or absence of cooling water when the engine 3 is a water-cooled engine that uses water from the water pump 4 as cooling water, and is unnecessary when the engine 3 is an air-cooled engine. be. Regarding the light emitting diode i, the circuit is configured such that it outputs to the not circuit of the driver circuit 47 corresponding to the light emitting diode i only under the condition that the pressure switch 13 is not operated and the voltage signal of the battery 6 is not input. The input pattern for lighting each of the light emitting diodes described above is illustrated in FIG. 6.

Next, the voltage detection circuit 45 connects its input side to the battery sensor 21 through a noise filter 51.
and the output side is connected to the not circuit of the driver circuit 47 corresponding to the light emitting diode e, and when the electrolyte level of the battery 6 decreases and the input voltage from the battery sensor 21 decreases, the above not circuit The light is output to light up the light emitting diode e.

In the above configuration, first the main switch 10
When set to the on position, the switch contact 10c opens, the short-circuited state of the magneto 11 is released, and the spark plug 35 becomes ready for the engine pump 1 to be able to spark in response to the operation of the magneto 11. At this time, the battery 6 and the monitor circuit M are connected through the connection terminals A and B, and the monitor circuit M becomes operable upon receiving this power supply. In this state, the detection magnet 12 is not activated yet, and the limit switch 17 and pressure switch 1 are not activated.
3 also remains open, so the signal pattern input to the decoder circuit 46 becomes 0-1-0 as shown in FIG. 6, and among the light emitting diodes a to d, only a lights up. This lights up on the display board 28 of the display boards 28 to 31 arranged in a circle on the monitor panel 22 to indicate that the engine pump 1 is ready for operation.

Next, when the main switch 10 is set to the start position, the switch contact 10b closes to drive the starter motor 7, and the accompanying rotation of the engine 3 activates the magneto 11, causing the spark plug 3 to
5 and the engine 3 is started. When the main switch 10 is at the start position, the switch contact 10a remains closed, and the magneto 12 also starts operating when the engine 3 starts, so the starting force is brought to the monitor circuit M.
The signal pattern input to the decoder circuit 46 is 1
-1-0, only light-emitting diode b of light-emitting diodes a to d is lit, and light-emitting diode a, which had been lit up until now, is turned off. The light emitting diode b is connected to the display board 2 on the monitor panel 22.
9, it displays the starting state of the engine pump 1. In addition, in this engine starting state, the lamp L is powered by the magneto 12.
lights up to illuminate the operation panel (not shown), allowing reliable operation even at night. The structure of the main switch 10 is as follows:
Switch contact 1 is in the on position when it is in the start position.
If the structure is such that 0a opens, the light emitting diode b will light up when the engine 3 is returned to the on position when it is thought that the engine 3 has started, so in this case as well, it is necessary to confirm the start. can. Also, when starting the engine 3 with the recoil starter (not shown) with the main switch 10 in the ON position without using the starter motor 7,
At the same time as activation, light emitting diode b lights up to confirm activation.

After starting the engine 3 is confirmed, the main switch 10 is manually or automatically returned to the on position. After a predetermined warm-up of the engine 3, the tension clutch 15 is connected by rotating the control lever 16. Accompanying this, the vacuum pump 5 is activated to remove air from the water pump 4 and start sucking water into it. That is, the engine pump 1 is in a water suction state, and in this state, the limit switch 1 is activated based on the rotation of the operating lever 16.
7 operates and closes the circuit, so decoder circuit 4
The signal pattern input to 6 becomes 1-0-0, and of the light emitting diodes a to d, only c lights up, and light emitting diode b, which was lit up until now, lights up.
is turned off. By placing the light emitting diode c on the display board 30 on the monitor panel 22, the water absorption state of the engine pump 1 is displayed. When this state continues for a while, the water pump 4 is filled with pumped water, and the water pump 4 driven directly by the engine 3 becomes ready to discharge water, and at this time the pressure switch 13 is activated to close the circuit. Therefore, in this state where water can be sprayed, the signal pattern input to the decoder circuit 46 is 1-0-
It becomes 1. Here, the actuation signal of the magneto 12 and the signal from the closing of the pressure switch 13 are sufficient for lighting the light emitting diode d, so even if the limit switch 17 is opened and the input signal pattern becomes 1-1-1, the above-mentioned 1- Even in the 0-1 pattern, only d of the light emitting diodes a to d lights up, and the light emitting diode c, which had been lit up until now, is turned off.
Display when water can be released. When it is confirmed that the water can be discharged, the operating lever 16 is returned to cut off the power transmission to the vacuum pump 4, and the water pump 4 is operated to start the water discharge operation. As the water spraying work progresses, when the water source dries up and water spraying becomes impossible, the pressure switch 13 opens the circuit, and at this time, the limit switch 17 also opens the circuit by returning the operating lever 16, and only the magnet 12 operates. Therefore, the signal pattern input to the decoder circuit 46 becomes 1-1-0, and the light-emitting diode d, which had been lit up until now, goes out and the light-emitting diode b lights up instead, indicating the starting state of the engine pump 1. It will now be displayed. At this time, on the abnormality warning display board 27 placed in the center of the monitor panel 22, the pressure switch 13 opens the circuit and no longer outputs the battery voltage signal to the decoder circuit 46, so the light emitting diode i lights up. warning that there is no engine coolant.

Here, other abnormality warning display boards 24 or 2
The lighting of the light emitting diodes e to h arranged at 6 will be explained. These are main switch 10
If it is in the on position, it can be turned on regardless of the operating step of the engine pump 1. For example, when the level of electrolyte in the battery 6 is low and it needs to be replenished, it can be turned on by a signal from the battery sensor 21. A light emitting diode e lights up on the display board 24 to issue a warning. Similarly, when the battery 6 is in an over-discharge state, a light emitting diode f lights up on the display board 24 based on a signal from the comparator circuit 43 to warn of this. Further, when the fuel in the fuel tank 8 is low and needs to be replenished, the light emitting diode g lights up on the display board 25 based on the closing of the fuel float switch 20 to warn of this. Furthermore, lack of oil in the oil tank 9 is detected by closing the oil float switch 19, and based on this signal, a light emitting diode h lights up on the display board 26 to warn of this.

As described above, in this embodiment, the monitor panel 22 indicates whether there is an abnormality in the battery 6 necessary for operating the engine pump, a decrease in fuel in the fuel tank 8, a decrease in oil in the oil tank 9, or whether the pumped water is used for cooling the engine. If water is used, a warning is given that the cooling water is running out, so for example, if the vacuum pump 5 is operated without oil due to lack of oil, the vane sliding contact area may be damaged and water absorption will not be performed efficiently. Accidents such as overheating of the engine 3 due to lack of engine cooling water can be prevented. Also, prepare and start engine pump 1,
Each operation step of water absorption and water discharge is monitored on panel 2.
2, the light emitting diodes a to d light up and display, and since the lighting is performed selectively in one-light display in chronological order based on each operating step of the engine pump 1, there is no misreading of the display. In addition, since the display boards 28 to 31 that display each operation step are arranged in a circle on the monitor panel 22 in the order of the operation steps, the mutual positional relationship of the light emitting diodes a to e that display these can be clearly seen. Therefore, just by glancing at the lighting of light-emitting diodes a to e, one can accurately recognize the meaning of the display.
Erroneous operation of the engine pump 1 is prevented, and even if the user is inexperienced in handling the engine pump 1, the engine pump 1 can be operated quickly and reliably.

In this embodiment, the tension clutch 1
5 may be replaced by an electromagnetic clutch mechanism, and in this case, instead of the limit switch 17, the actuation signal of the electromagnetic clutch can be used as the actuation detection signal of the vacuum pump 5. Also, the vacuum pump 5
may be directly driven by a motor powered by the battery 6; in this case, the on/off switch may be used as an operation detection sensor for the vacuum pump 5 in place of the limit switch 17.

As explained above, according to the present invention, each operating step from the engine pump's ready state to the water spraying state is illuminated on the monitor panel, so the operating state of the engine pump can be clearly seen in one place, and the fire department It is reliably visible even in noisy conditions such as during activities, and since the display is performed chronologically and selectively, the operating status can be confirmed just by looking at the lighting position.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing an embodiment of an engine pump to which the present invention is applied, Fig. 2 is a schematic view of its operation display device, Fig. 3 is a front view of a monitor panel, and Fig. 4 is an operation display. FIG. 5 is a logic sequence diagram of the decoder circuit in the monitor circuit, and FIG. 6 is a diagram of the input signal pattern to the decoder circuit. 1...Engine pump, 3...Engine, 4...
... Lifting pump, 5 ... Vacuum pump, 6 ... Battery, 8 ... Fuel tank, 9 ... Oil tank, 1
0...Main switch, 12...Detection magneto,
13...Pressure switch, 17...Limit switch, 19...Oil float switch, 20...
Fuel float switch, 21...Battery sensor, 22...Monitor panel, 36...Power supply circuit, 41...Voltage conversion circuit, 42...Reference voltage generation circuit, 43, 44...Comparison circuit, 45...Voltage detection Circuit, 46...decoder circuit, 47...driver circuit, a to i...light emitting diode.

Claims (1)

[Claims] 1. An engine pump that includes an engine, a water pump driven by the engine, and a vacuum pump that sucks water into the water pump, and that discharges water with the water pump after the vacuum pump completes water suction. A detection means having a main switch, an engine rotation detection sensor, a vacuum pump operation detection sensor, and a water absorption completion sensor, and processes output signals from the detection means to at least prepare, start, and absorb water from the engine pump. A monitor circuit that selectively lights up and displays each operating step of water spraying in chronological order, and a monitor panel that uses the output of this monitor circuit to display each operating step from the ready state of the engine pump to the ready state for water discharging. An engine pump operation display device comprising: 2. The engine pump operation display device according to claim 1, wherein the lighting indicating each operation step of the engine pump is arranged in a circle in the display section.