JP2000264569A - Magnetic attracting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rational magnetic attracting device usable according to the voltage of a power source by making the connected state of divided coil blocks optionally changeable, and changing applied voltage correspondingly. SOLUTION: Even in the case of any coil winding diameter, if the connected state of coil blocks is appropriately changed when changing voltage, the change of current quantity is suppressed small to obtain a well-balanced driving condition. There is a tendency that the larger the voltage is, the larger the electromagnetic force becomes, and the electromagnetic force is appropriately changed according to a purpose. About 80% of the disposal of construction waste material in a demolition site of a construction can be coped with by an attracting device for 24 V. As a power source of 24 V, a battery for self-advancing of a construction vehicle or a motor truck is used, and the connection of the coil blocks is changed according to voltage in a range of 24-220 V with the battery and a generator as the power source to cope with the purpose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic attraction device suitably used for sorting and transporting, for example, iron scraps.

[0002]

2. Description of the Related Art For example, waste materials such as reinforcing bars generated by the demolition work of buildings such as buildings are separated into concrete and iron materials at the site, and the iron materials are collected, each of which is loaded on a truck and carried out. You.

[0003] In such a work site, for example, an operation of accumulating waste materials such as reinforcing bars and a process of loading a truck are shown in FIG.
As shown in FIG. 1, a magnetic attraction device (hereinafter, referred to as an attraction device) 20 using a DC (direct current) power source is provided at the tip of an arm 14 of a civil engineering construction vehicle (hereinafter, referred to as a construction vehicle) such as a hydraulic shovel car. A group of rebars bent in various shapes is attached by operation of a driver mounted on the cab 12 and operated by a driver on the cab 12, lifted and conveyed.

[0004] Such an adsorption device uses an electromagnet in which a solenoid coil is wound around a magnetic core, and converts an AC (alternating current) power supply by a mobile generator into a DC by an AC → DC (direct current) conversion device, or constructs it. A dedicated generator (DC output) 15 mounted on the vehicle is used as a power source, and a driver's switch operation in the driver's cab 12 operates an electromagnetic force cutoff switch (both poles are energized while being energized. When the power supply is stopped, a switch that automatically switches so that the same poles repel each other is activated, the magnetic force disappears instantaneously, and the suspended workpiece is separated from the apparatus.

[0005]

However, the conventional magnetic attraction device described above has a constant voltage (for example, DC
200V), other than 200V if the generator mounted on the construction vehicle does not have a 200V power generation capacity, or if the construction vehicle has no generator or no mobile generator The lifting device constituted by the above voltage could not be used.

[0006] In addition, when an expensive mobile generator is installed, an expensive AC-DC (AC-DC) converter must be provided in parallel.

The present invention has been made in view of the above circumstances, and has as its object to provide a rational magnetic attraction device that can be used according to the voltage of a power supply.

[0008]

That is, the present invention has an electromagnet including a magnetic core and a solenoid coil wound around the magnetic core. In a magnetic attraction device that moves while attracting, the solenoid coil is divided into a plurality of coil blocks, and the connection state of these coil blocks is configured to be arbitrarily switchable, and the applied voltage is changed correspondingly. (Hereinafter, sometimes referred to as the adsorption device of the present invention).

According to the present invention, the blocks of the solenoid coil divided into a plurality can be arbitrarily connected in accordance with the applied voltage, so that the voltage of the power supply (for example, DC power supply) is limited to a specific voltage. Without this, an effective connection method can be selected and used according to various voltages. As a result, a combination of a well-balanced current and resistance using a battery or the like for an engine of a construction vehicle as a power source provides a high electromagnetic force and a high efficiency use condition, and an expensive mobile generator or AC-DC converter. It is possible to provide a rational magnetic attraction device that does not require a vessel.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the suction device of the present invention has a magnetic core having a plurality of coil blocks (4a to 4a).
d), a yoke 3 extending from the back side of the magnetic core 2 to a suction position on the outer periphery of the solenoid coils (4a to 4d) or a position in the vicinity thereof forms a magnetic path together with the magnetic core 2. Is desirable.

The plurality of blocks 4a to 4d of the solenoid coil are connected in parallel or / and / or depending on the voltage of the power supply.
And it is desirable to use it connected in series.

[0013] Thus, the present invention can be suitably used for treating waste materials such as reinforcing bars generated in the demolition work of a building or the like attached to a construction vehicle or the like, and for treating scrap in a scrap factory or an ironworks.

[0014]

Embodiments of the present invention will be described below in detail.

FIG. 1 is a sectional view of a main part of a magnetic attraction device 1 according to an embodiment. As shown in the figure, a magnetic core 2 is fixed to the center of a yoke 3 having a U-shaped cross section, the diameter and the number of windings of the magnetic core 2 are formed to the same standard, and solenoid coils 4a to 4d divided into four blocks are wound. The tip of the yoke 3 is formed as an outer pole 8 and the tip of the magnetic core 2 is formed as an inner pole 9. The solenoid coil 4d on the tip side is protected by a protection plate 10 to form an electromagnet.

The adsorption device 1 is for 24 V, 1
The diameter of the adsorption device 1 was changed to 800 mm and 900 m by changing the number of windings of each of the three types for 00 V and 220 V.
Three types formed in m and 1000 mm were produced.

The terminals of the windings of the solenoid coils 4a to 4d are gathered as terminals 6 and 7 in a terminal case 5, so that the connection between the coils can be arbitrarily performed. 1 is attached to the tip of the arm 14 of the construction vehicle as shown in FIG. 2, and each of the solenoid coils 4a to 4
d is used by connecting in series or in parallel.

FIGS. 3 to 5 show the above described 24V, 100V,
It is a block diagram which shows the connection pattern in 220V.

That is, FIG. 3 shows that the terminals 6a to 6d and 7a to 7d of the solenoid coils 4a to 4d are connected in parallel for a 24V power supply, and the collective terminals 6 and 7 are connected.
Is shown.

FIG. 4 shows a state in which solenoid coils 4a and 4d and solenoid coils 4c and 4d are connected in series for a power supply of 100V, and the series blocks are connected in parallel to form collective terminals 6A and 7B.

FIG. 5 shows the terminals 6a to 6d of the solenoid coils 4a to 4d for a power supply of 220V.
And 7a to 7d are connected in series to form a collective terminal 6B and 7-.

The electromagnetic force of the electromagnet is theoretically proportional to the current and further depends on the resistance. However, in practice, there are restrictions on the size and weight of the electromagnet, and the size and number of windings that can be used are Is also limited.

That is, the electromagnetic force obtained under the permissible dimensions and weight of the electromagnet depending on the application depends on the voltage, current and resistance under the conditions of the permissible winding size and number of turns. That is, in a certain connection pattern under a certain voltage, even if a current with little resistance and a large current is obtained, when a voltage higher than that is applied, the current flows excessively and the coil is overheated. Therefore, the energization time is limited.

Therefore, it is important to obtain a high electromagnetic force while maintaining the voltage, current and resistance in a well-balanced manner. For this purpose, the connections between the coil blocks are connected in series or in parallel or a combination thereof in accordance with the voltage. By controlling or changing as described above, the balance is maintained and the time during which the power can be supplied becomes longer. In the case of a large electromagnet, the ratio between the time during which continuous energization is possible and the required energization rest time is generally displayed as the ED rate (%).

FIG. 6 shows the above-mentioned 24 V, 100 V,
Diameter φ800, φ90 of adsorption device for 220V
FIG. 7 shows the electromagnetic force (Gauss), and FIG. 8 shows the ED ratio.

That is, 24V, 100V and 220V
In both cases, it shows various performances, electromagnets, and ED rates in a more efficient and practical connection pattern under the above-described restrictions and conditions according to the voltage of the power supply.

FIG. 6 shows that, regardless of the coil winding diameter, if the connection state of the coil block is changed as appropriate when changing the voltage, fluctuations in the amount of current can be suppressed and a well-balanced driving condition can be obtained. I understand.

As shown in FIG. 7, there is a tendency that the larger the voltage is at all of φ800, φ900 and φ1000, the larger the electromagnetic force (the value at a position 30 cm outward from the magnetic pole surface of the magnetic core) is. It will be appreciated that it will vary appropriately depending on the application. In FIG. 7, in is the inner pole side, o
ut indicates the outer pole side.

FIG. 8 shows these ED ratios, φ800,
As described above, both ９００900 and １０００1000 are the ED ratios in the connection method with the best balance under various constraints and conditions, and it can be seen that the same use condition is obtained for each voltage and practical.

As described above with reference to FIGS. 6 to 8, it can be said that the larger the voltage is, the higher the overall performance is. However, the performance is not necessarily proportional to the voltage.
It can be evaluated that the efficiency is higher in the case of 24V having a lower voltage than that of V.

However, about 80% of the processing of ordinary construction waste material at the demolition site of a building can be handled by a 24V adsorption device. A 24V power supply uses a battery for self-propelled vehicles such as construction vehicles and trucks. Such a battery and a generator are used as power supplies.
It is a noteworthy feature of the present invention that the connection of the coil blocks can be changed according to the voltage in the range of V to 220V.

Therefore, at the site where this is used, the optimum terminal connection can be made according to the voltage of the available power supply, and it is also possible to easily change to another connection pattern.

Therefore, even in a construction vehicle without a dedicated generator or a UNIC vehicle equipped with a dedicated crane in front of a truck bed, if an electric power source is not installed on site, a battery for the engine of the own vehicle is used. Can be used as power supply.

FIG. 9 shows one row of the use state of the suction device 1, which is attached to the tip of the arm 14 of the construction vehicle, and the state where the rebar waste material 16 is suctioned at the demolition work site of a building or the like. The suction device 1 can be mounted on all construction vehicles.

According to the present embodiment, the solenoid coils 4a to 4d constituting the magnetic attraction device 1 are divided and used for 24V, 100V and 2V depending on the state of usable power supply.
Since the terminals 6a to 6d and 7a to 7d can be used by connecting them in parallel or in series for 20 V, the adsorption device 1 can be used efficiently and the engine for the own vehicle such as a construction vehicle can be used. Since a 24V battery can be used, even if there is no generator facility, it is possible to respond immediately. In addition, it is possible to reduce the equipment cost of an expensive AC-DC converter for a mobile generator that generates AC power.

The above embodiment can be variously modified based on the technical idea of the present invention.

For example, as shown in FIG. 10, the block of the solenoid coil can be constituted as an adsorption device 1A composed of three blocks, or can be divided into four or more blocks.

Further, the overall shape and structure of the adsorption device 1 can be appropriately implemented in addition to the above-described embodiment. Such an adsorption device is not limited to a construction vehicle, but may be a stationary construction machine, a ship, or an underwater. It can also be applied to metal exploration and the like.

[0039]

As described above, the present invention provides a magnetic core,
A magnetic attraction device having an electromagnet composed of a solenoid coil wound around the magnetic core and moving a predetermined object to be attracted to the magnetic core while magnetically adsorbing the magnetic core; Since the magnetic attraction device is divided into blocks and the connection state of these coil blocks is configured to be arbitrarily switchable and the applied voltage is changed correspondingly, the power supply to be used (for example, DC power supply) The effective connection method can be selected and used according to various voltages without being limited to a specific voltage. As a result, a combination of a well-balanced current and resistance using a battery or the like for an engine of a construction vehicle as a power source can provide a high electromagnetic force and a high-efficiency use condition, resulting in an expensive mobile generator and AC-DC converter. A rational magnetic attraction device that does not require a vessel can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a magnetic attraction device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the construction vehicle to which the magnetic attraction device is attached.

FIG. 3 is a block diagram showing connection of terminals for 24 V in the magnetic attraction device.

FIG. 4 is a block diagram showing connection of terminals for 100 V in the magnetic attraction device.

FIG. 5 is a block diagram showing connection of terminals for 220 V in the magnetic attraction device.

FIG. 6 is a diagram showing a performance table of the magnetic attraction device.

FIG. 7 is a diagram showing an electromagnetic force of the magnetic attraction device.

FIG. 8 is a diagram showing the ED ratio of the magnetic attraction device.

FIG. 9 is a perspective view of a main part showing a use state of the magnetic attraction device.

FIG. 10 is a sectional view of a main part showing a modification of the magnetic attraction device.

FIG. 11 is a perspective view showing a construction vehicle equipped with a magnetic attraction device according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Magnetic adsorption apparatus 2 ... Magnetic core 3 ... Yoke 4a-4d ... Solenoid coil 5 ... Terminal case 6a-6d, 7a-7d ... Terminal 8 ... Outer pole 9 ... Inner pole 10 ... Protective plate 12 ... Cabinet 14 ... Arm mechanism 15 ... Generator 16 ... Reinforcing bar waste material

Claims (4)

[Claims] 1. A magnetic attraction device which has an electromagnet including a magnetic core and a solenoid coil wound around the magnetic core, and mainly moves a predetermined object to be attracted to the magnetic core while magnetically attracting the object. A magnetic attraction device in which the solenoid coil is divided into a plurality of coil blocks, the connection state of these coil blocks can be arbitrarily switched, and the applied voltage is changed correspondingly. 2. The magnetic core is configured as a magnetic core common to the plurality of coil blocks, and a yoke extending from a back side of the magnetic core to a position at or near an outer periphery of the solenoid coil to form a magnetic path together with the magnetic core. The magnetic attraction device according to claim 1, wherein the magnetic attraction device is formed. 3. The magnetic attraction device according to claim 1, wherein the plurality of blocks of the solenoid coil are used by being connected in parallel or / and in series. 4. The magnetic attraction device according to claim 1, which is used by being attached to a construction vehicle.