JP2007210741A - Electric storage device in magnet working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric storage device in a magnet working machine, capable of monitoring the discharge from a storage battery so that the discharge can be suppressed. <P>SOLUTION: A generator 2 is connected to an engine 1, and an output unit of the generator 2 is connected to a storage battery 3, and also connected to a magnet control panel 4 for controlling the conduction to a magnet M. The storage battery 3 can be charged by the DC power generated by the generator 2, and discharged to the magnet M. A reporting means 10 for detecting and reporting the discharge to the magnet M from the storage battery 3 is provided on a charge-discharge line 3a of the storage battery 3. The reporting means 10 has a current sensor 11 for detecting the discharge current of the storage battery 3 in the charge-discharge line 3a, and a diode 12 and a coil 13c of a relay 13 for running the current when discharging the storage battery 3 in an output circuit of the current sensor 11. A magnet operation switch 6 and a display lamp 14 are connected in series to a contact 13a of the relay 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power storage device in a magnet working machine capable of monitoring a power storage state of a storage battery.

  FIG. 4 shows a magnet working machine A in which an electromagnet, that is, a magnet is mounted instead of a bucket of a hydraulic excavator, and a magnet M as an electromagnet is mounted on the tip of an arm-shaped working device C provided in the machine body B. Yes. In such a magnet work machine A, a generator and a storage battery such as a battery charged by the generator are mounted on the machine body B.

  Then, a magnet hydraulic motor is connected to the generator, and the generator is driven by supplying discharge oil from the magnet hydraulic pump to the magnet hydraulic motor. When the adsorption work by the magnet is stopped, The unload circuit provided between the magnet hydraulic pump and the magnet hydraulic motor is operated to unload the discharge oil from the magnet hydraulic pump to the tank, thereby stopping the rotation of the magnet hydraulic motor. There is one in which the generator operation driven by the magnet hydraulic motor is stopped to prevent useless operation of the generator (for example, see Patent Document 1).

On the other hand, when the generator as a power source of the magnet M is driven by the engine, the generator 2 driven by the engine 1 is connected to a storage battery 3 such as a battery and a magnet control panel as shown in FIG. 4, DC power generated by the generator 2 is charged to the storage battery 3 and is also controlled by the magnet control panel 4 to be supplied to the magnet M.
JP 2002-348087 (page 3-4, FIG. 1)

  Although the conventional system shown in FIG. 5 is a general magnet drive system, if the magnet working machine A is operated with the engine speed being low, the power supplied from the generator 2 to the magnet M is insufficient. The magnet M is supplemented with electric power by the discharge from the storage battery 3. If the magnet work is performed for a long time in this state, there is a problem that the power stored in the storage battery 3 is lost and the magnet working machine A cannot be operated.

  This invention is made | formed in view of such a point, and it aims at providing the electrical storage apparatus in the magnet working machine which can be monitored so that the discharge from a storage battery can be suppressed.

  The invention described in claim 1 is a magnet working machine that works by attracting a workpiece with an energized magnet, an engine mounted on the magnet working machine, and a generator that is driven by the engine and supplies electric power to the magnet. A power storage device in a magnet working machine comprising: a storage battery that can be charged by the power generated by the generator and dischargeable to the magnet; and a notification means that detects and notifies the discharge from the storage battery to the magnet It is.

  According to a second aspect of the present invention, in the power storage device in the magnet working machine according to the first aspect, the magnet working switch for operating energization to the magnet is provided, and the notification means includes a current sensor provided in a charge / discharge line of the storage battery, A diode that is provided in the output circuit of this current sensor and flows a current when the storage battery is discharged, a relay having a coil connected in series with this diode, a contact that closes when the coil of this relay is excited, and a magnet operation switch connected in series And an indicator lamp that is turned on when the storage battery is discharged when the magnet is operated.

  According to a third aspect of the present invention, there is provided a magnet working machine that works by attracting a workpiece with an energized magnet, an engine mounted on the magnet working machine, and a generator that is driven by the engine and supplies electric power to the magnet. A storage battery that can be charged by the power generated by the generator and dischargeable to the magnet, a discharge detection sensor that detects discharge from the storage battery to the magnet, and a discharge detected by the discharge detection sensor Is a power storage device in a magnet working machine including a controller that outputs a warning signal and a display device that receives a warning signal from the controller and displays a warning.

  According to a fourth aspect of the present invention, in the power storage device in the magnet working machine according to the third aspect, the discharge detection sensor detects a discharge current from the storage battery to the magnet, and the controller is detected by the discharge detection sensor. Determine whether the discharge current is greater than the specified current value. If the discharge current is greater than the specified current value, determine whether the engine accelerator output is maximum. If the engine accelerator output is not maximum, A warning signal instructing to increase the rotation speed is output to the display device, and when the accelerator output of the engine is maximum, a warning signal notifying the abnormality of the generator is output to the display device.

  According to the first aspect of the present invention, in the magnet working machine capable of supplying electric power to the magnet by the generator driven by the engine and discharging from the storage battery to the magnet, the discharge from the storage battery to the magnet is detected. The notifying means for notifying the operator of the magnet working machine can inform the discharge during the magnet operation, and the operator can suppress the discharge from the storage battery by increasing the engine rotation speed and increasing the amount of power supplied from the generator. Can call attention.

  According to the second aspect of the present invention, the notification means can be configured simply by using inexpensive commercial products such as current sensors, diodes, relays, and indicator lamps.

  According to a third aspect of the present invention, in a magnet working machine that supplies electric power to a magnet by a generator driven by an engine and can also discharge the magnet from the storage battery, the discharge detection sensor detects discharge from the storage battery to the magnet. Since the display device displays a warning by a warning signal output from the controller, the operator of the magnet working machine can be informed of the discharge during the magnet operation from the storage battery to the magnet through the display device, and the engine speed can be reduced. The operator can be alerted so that the discharge from the storage battery can be suppressed by increasing the amount of power supplied from the generator.

  According to the fourth aspect of the present invention, the controller detects whether the discharge current from the storage battery to the magnet is detected by the discharge detection sensor and determines whether or not the discharge current to the magnet is larger than the specified current value. When the current is larger than the specified current value, a warning signal is output and the warning content is displayed on the display device. Therefore, the warning is more appropriate than the simple discharge display depending on the setting of the specified current value for the controller and the warning content by the display device. Can be performed. In particular, if the discharge current from the storage battery to the magnet is greater than the specified current value, determine whether the engine accelerator output is maximum, and if not, indicate that there is room to increase the engine speed. Output the warning signal to the display device, and if it is the maximum, the generator does not output the power corresponding to the engine rotation speed, so by outputting a warning signal to notify the abnormality of the generator to the display device, It is also possible to deal with generator abnormalities that cannot be dealt with simply by increasing the engine speed by the operator.

  Hereinafter, the present invention will be described in detail with reference to the first embodiment shown in FIG. 1 and the second embodiment shown in FIGS. The magnet working machine A shown in FIG. 4 is also used in this description.

  First, the first embodiment shown in FIG. 1 will be described. An engine 1 mounted on a magnet work machine A is connected to a generator 2 driven by the engine 1. The generator 2 supplies DC power generated according to the rotational speed of the engine 1 (hereinafter referred to as engine speed) to a magnet M that is an electromagnet. The generator 2 may be a combination of an AC generator and a rectifier.

  The output unit of the generator 2 is connected to a storage battery 3 such as a battery, and is connected to a magnet control panel 4 that controls energization to the magnet M. The storage battery 3 is connected to the storage battery 3 by DC power generated by the generator 2. In addition to being able to be charged, the magnet M can be excited by being controlled by the magnet control panel 4.

  The storage battery 3 is a secondary battery that can be charged by DC power generated by the generator 2 and can be discharged to the magnet M. The magnet working machine A is supplied from the generator 2 or the storage battery 3. The magnet M is excited by electric power, and a work such as scrap is attracted by the energized magnet M to perform operations such as loading and transportation.

  The magnet control panel 4 has a magnet mode switch 5 for instructing a magnet working mode to be turned on when the magnet M is attached to the tip of the working device C instead of a bucket or the like, and the magnet M is turned on / off. A magnet operation switch 6 to be operated is connected.

  The positive electrode of the storage battery 3 is connected to the magnet control panel 4 and is connected to a hydraulic excavator control panel 7 that controls the movement of the machine body B and the work device C of the magnet working machine A, and the negative electrode of the storage battery 3 is connected to the ground 8. Has been.

  Hydraulic pumps 9a and 9b are connected to the drive shaft of the engine 1, and hydraulic oil is supplied from these hydraulic pumps 9a and 9b to a hydraulic motor and a hydraulic cylinder of the magnet working machine A.

  The charging / discharging line 3a of the storage battery 3 is provided with notification means 10 for detecting and notifying the discharge from the storage battery 3 to the magnet M.

  That is, the notification means 10 is provided with a current sensor 11 for detecting the discharge current of the storage battery 3 in the charge / discharge line 3 a of the storage battery 3, and a current flows through the output circuit of the current sensor 11 when the storage battery 3 is discharged. A diode 12 and a relay 13 are provided.

  The relay 13 includes a normally open contact 13a and a coil 13c that closes the contact 13a when excited. The coil 13c is connected in series to the cathode side of the diode 12, and when a current flows through the coil 13c and the coil 13c is excited, the contact 13a is closed.

  The contact 13a of the relay 13 is connected in series with the contact of the magnet operation switch 6 and the indicator lamp 14 that is turned on when the storage battery 3 is discharged when the magnet is operated.

  Next, the function and effect of the first embodiment will be described.

  When the magnet mode switch 5 is turned on and the magnet operation switch 6 is turned on, a current flows from the generator 2 and the storage battery 3 to the magnet M via the magnet control panel 4, and the magnet M is excited.

  When the engine speed is high, necessary power is supplied to the magnet M from the generator 2 only via the magnet control panel 4. On the other hand, when the engine speed is low, the power supplied from the generator 2 is small, the storage battery 3 is discharged, and current is supplied from the storage battery 3.

  At this time, the output current of the current sensor 11 flows from the diode 12 to the coil 13c of the relay 13, and the contact 13a of the relay 13 is closed by the exciting action of the coil 13c. Therefore, current flows from the magnet operation switch 6 in the on state to the indicator lamp 14 through the contact 13a of the relay 13, and the indicator lamp 14 is lit.

  Therefore, the lighting of the indicator lamp 14 can inform the operator that the storage battery 3 is discharged when the magnet is operated (when the magnet operation switch 6 is turned on), and the operator can blow the accelerator of the engine 1. By operating the accelerator dial and increasing the engine speed, the amount of power supplied from the generator 2 can be increased, thereby preventing discharge from the storage battery 3.

  That is, in the magnet working machine A that supplies power to the magnet M by the generator 2 driven by the engine 1 and can also discharge the magnet M from the storage battery 3, the discharge from the storage battery 3 to the magnet M is detected. The notifying means 10 for notifying by the indicator lamp 14 can notify the operator of the magnet working machine A of the discharge from the storage battery 3 at the time of magnet operation, in other words, the operator knows that the amount of power supplied from the generator 2 is not sufficient. The operator can be alerted so that the discharge from the storage battery 3 can be suppressed by increasing the engine speed and increasing the amount of power supplied from the generator 2.

  In addition, the notification means 10 can be configured simply with inexpensive commercially available products such as the current sensor 11, the diode 12, the relay 13, and the indicator lamp 14.

  Next, the second embodiment shown in FIGS. 2 and 3 will be described. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 2, the charge / discharge line 3a of the storage battery 3 is provided with a current sensor 15 as a discharge detection sensor for detecting a discharge current from the storage battery 3 to the magnet M. The output circuit of the current sensor 15 is When discharge is detected by the current sensor 15, it is connected to a controller 16 that outputs a warning signal.

  The controller 16 includes the magnet mode switch 5, the magnet operation switch 6, an engine controller 17 that controls the rotational speed of the engine 1, and a display device that displays a warning in response to a warning signal from the controller 16. The monitor 18 is connected to an accelerator dial 19 for setting the engine speed.

  Next, the function of the controller 16 shown in FIG. 2 will be described with reference to the control flowchart shown in FIG.

(Step Sl)
In the input processing step Sl, the on / off signals of the magnet mode switch 5 and the magnet operation switch 6, the dial value input signal from the accelerator dial 19, and the signal detected by the current sensor 15, that is, the discharge current are read.

(Step S2)
In determination step S2, it is determined whether or not the magnet mode switch 5 is on. If the magnet mode switch 5 is ON in the determination step S2, the determination step S3 is entered. Otherwise, return to Step Sl.

(Step S3)
In a determination step S3, it is determined whether or not the dial value of the accelerator dial 19 is smaller than a predetermined accelerator value required during magnet work.

(Step S4)
If the dial value of the accelerator dial 19 is smaller than the predetermined accelerator value required during the magnet operation, the engine controller is configured to increase the accelerator output of the engine 1 to the accelerator value required during the magnet operation in processing step S4. Correct by 17.

(Step S5)
Next, in determination step S5, it is determined whether or not the magnet operation switch 6 is in an on state.

(Step S6)
If the magnet operation switch 6 is on, the output of the current sensor 15 is confirmed in judgment step S6, and whether or not the discharge current from the storage battery 3 to the magnet M detected by the current sensor 15 is greater than the specified current value. Determine.

(Step S7)
If the discharge current from the storage battery 3 is greater than the specified current value, it is determined in determination step S7 whether or not the engine accelerator output is maximum.

(Step S8)
When the accelerator output of the engine is not the maximum, a warning signal instructing to increase the engine speed is output to the monitor 18 in processing step S8, and “increase the engine speed” is displayed on the monitor 18.

(Step S9)
On the other hand, when the accelerator output of the engine is the maximum, a warning signal notifying the abnormality of the generator 2 is output to the monitor 18 at a processing step S9, and “generator abnormality” is displayed on the monitor 18.

  Next, the function and effect of the embodiment shown in FIGS. 2 and 3 will be described.

  The output signal from the current sensor 15 provided on the charge / discharge line 3a of the storage battery 3 and the signals of the magnet mode switch 5, the magnet operation switch 6 and the accelerator dial 19 are input to the controller 16, and during the magnet mode, Whether or not the accelerator output of the engine 1 is set to at least an accelerator value during magnet operation, that is, a specified value, and whether or not the discharge current from the storage battery 3 to the magnet M detected by the current sensor 15 during the magnet operation is larger than the specified current value. If the discharge current to the magnet M is larger than the specified current value, a warning for instructing to increase the engine speed or a generator abnormality is displayed on the monitor 18.

  And in the magnet working machine A which can supply electric power to the magnet M by the generator 2 driven by the engine 1 and can also discharge the magnet M from the storage battery 3, the discharge current from the storage battery 3 to the magnet M is a current sensor. When detected by 15, the monitor 18 displays a warning by a warning signal output from the controller 16, so the operator of the magnet working machine can be informed of the discharge from the storage battery 3 to the magnet M during the magnet operation through the monitor 18. The operator can be alerted so that the discharge from the storage battery 3 can be suppressed by increasing the engine rotation speed and increasing the amount of power supplied from the generator 2.

  That is, the discharge current from the storage battery 3 to the magnet M is detected by the current sensor 15, and the discharge current to the magnet M is defined by the controller 16 that determines whether or not the discharge current to the magnet M is larger than the specified current value. When the current value is larger than the current value, a warning signal is output and the warning content is displayed on the monitor 18, so the operator of the magnet working machine can determine the degree of discharge from the storage battery 3 to the magnet M when operating the magnet through the warning content of the monitor 18. The operator of the magnet working machine can alert the operator so that the discharge from the storage battery 3 can be suppressed by increasing the engine speed and increasing the amount of power supplied from the generator 2.

  In addition, by setting the specified current value for the controller 16 and the warning content by the monitor 18, an appropriate warning can be given compared to a simple discharge display.

  Further, when the discharge current from the storage battery 3 to the magnet M is larger than the specified current value, it is determined whether or not the accelerator output of the engine 1 is maximum. If not, there is room for increasing the engine speed. A warning signal is output to the monitor 18, and if it is the maximum, the generator 2 does not output the power corresponding to the engine speed, so the warning signal notifying the abnormality of the generator 2 is output to the monitor 18. By outputting, it is possible to cope with the abnormality of the generator 2 that cannot be dealt with by the operator simply increasing the engine speed.

It is a circuit diagram which shows 1st Embodiment which concerns on the electrical storage apparatus in the magnet working machine of this invention. It is a circuit diagram which shows 2nd Embodiment which concerns on an electrical storage apparatus same as the above. It is a flowchart which shows the control procedure by the controller shown by FIG. It is a side view of a magnet working machine. It is a circuit diagram which shows the conventional electrical storage apparatus.

Explanation of symbols

A Magnet work machine M Magnet 1 Engine 2 Generator 3 Storage battery
3a Charge / discharge line 6 Magnet operation switch
10 Notification means
11 Current sensor
12 diodes
13 Relay
13a contact
13c coil
14 Indicator light
15 Current sensor as discharge detection sensor
16 controller
18 Monitor as a display device

Claims (4)

In a magnet working machine that works by attracting a workpiece with an energized magnet,
The engine mounted on this magnet work machine,
A generator driven by this engine to supply power to the magnet;
A storage battery that can be charged by the power generated by the generator and dischargeable to the magnet;
A power storage device for a magnet working machine, comprising: a notification unit configured to detect and notify the discharge from the storage battery to the magnet. It has a magnet operation switch that controls the energization of the magnet.
Notification means
A current sensor provided in the charge / discharge line of the storage battery;
A diode that is provided in the output circuit of this current sensor and that allows current to flow when the storage battery is discharged;
A relay having a coil connected in series with the diode;
The magnet working machine according to claim 1, further comprising: a contact that closes when the coil of the relay is energized, and an indicator lamp that is connected in series with the magnet operation switch and lights when the storage battery is discharged when the magnet is operated. Power storage device. In a magnet working machine that works by attracting a workpiece with an energized magnet,
The engine mounted on this magnet work machine,
A generator driven by this engine to supply power to the magnet;
A storage battery that can be charged by the power generated by the generator and dischargeable to the magnet;
A discharge detection sensor for detecting discharge from the storage battery to the magnet;
When a discharge is detected by this discharge detection sensor, a controller that outputs a warning signal;
A power storage device for a magnet working machine, comprising: a display device that receives a warning signal from the controller and displays a warning. The discharge detection sensor detects the discharge current from the storage battery to the magnet.
The controller
Determine whether the discharge current detected by the discharge detection sensor is greater than the specified current value,
If the discharge current is greater than the specified current value, determine whether the engine's accelerator output is maximum,
When the accelerator output of the engine is not the maximum, a warning signal instructing to increase the engine speed is output to the display device,
The power storage device for a magnet working machine according to claim 3, wherein when the accelerator output of the engine is maximum, a warning signal notifying the abnormality of the generator is output to a display device.

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