JPH10218548A - Lifting magnet device for hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize a hydraulic shovel as a lifting magnet type and ensuring its applicability and taking aseismatic measures for its major parts while constituting it to match the specification of the lifting magnet type, by attaching a lifting magnet device as one attachment to the arm of the shovel. SOLUTION: A lifting magnet device for a hydraulic shovel comprises a magnet body 11 adapted to be attached to an arm 4 with the use of an attachment mounting structure. The magnet body 11 is mounted with a hydraulic motor 15 connected to a hydraulic line 9, a generator 16 driven by the motor 15, and a control panel 17 for the generator 16 by way of a bracket 13 fixed on the body 11 by means of shock absorbers 14 for absorbing shocks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting magnet device for adsorbing and handling a work by electromagnetic force, and more particularly to a device capable of using a general-purpose hydraulic excavator to be used as a lifting magnet as it is. About.

[0002]

2. Description of the Related Art A hydraulic excavator provided with a lifting magnet will be described with reference to FIG. First, FIG. 7A shows an external power supply type. In the figure, reference numeral 51 denotes a bogie of a hydraulic shovel; 52, a swivel mounted on the bogie 51; 53, a boom supported by the swivel 52; 54, an arm supported by a boom 53; The swivel 52 is swiveled, and the boom 53
And the arm 54 is swung in a vertical plane. A magnet body 55 is attached to the tip of the arm 54.
And a generator 56 outside the excavator.
And a control panel 57, and the control panel 57 and the magnet main body 55 are electrically connected by a cable 58. Then, by opening and closing a switch drawn from the control panel 57 to the operator's cab of the swivel 52, energization and cutoff of the magnet main body 55 are switched, thereby causing the magnet main body 55 to generate an electromagnetic force and attract a workpiece. The operation is switched between the operation and the operation of releasing the work by extinguishing the electromagnetic force. FIG. 7B shows a power supply mounted type (for example, see Japanese Utility Model Application Laid-Open No. 59-99882).
This device is different from the above-mentioned external power supply type in that a generator 56 having a dedicated engine 56a and a control
It has been installed in. That is, the dedicated engine 56a
The hydraulic pump is turned to generate a hydraulic pressure, and the hydraulic motor is turned by this hydraulic pressure to turn the generator 56. FIG. 7C shows another power supply mounting type. This apparatus is different from the power-supply type shown in FIG. 7B in that a hydraulic pump generated by rotating a hydraulic pump in a main engine 60 mounted on a bogie is used, and a hydraulic motor is rotated by the hydraulic pressure to rotate a generator 56. Is a point.

[0003]

In general, in a general-purpose hydraulic excavator, an attachment most suitable for the work is selected from various attachments, for example, for excavation work and for cutting a structure, and mounted on the tip of the arm. A hydraulic pipe led from the hydraulic pump to the tip of the arm is connected to the attachment, and the attachment is operated by supplying hydraulic oil to a hydraulic cylinder, a hydraulic motor, and the like of the attachment. However, the above three types of lifting magnets require a hydraulic excavator dedicated to the lifting magnet. That is, a general-purpose hydraulic excavator cannot be mounted and used in the same manner as a normal attachment for excavation work, structure cutting, or the like that can be mounted on the excavator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to make a lifting magnet device as one of the attachments attachable to an arm of a hydraulic shovel, so that a general-purpose device can be used. An object of the present invention is to provide a lifting magnet device of a hydraulic shovel that can be tailored to a lifting magnet specification while using a hydraulic shovel. In addition, the purpose is to take seismic measures for the main parts at that time.

[0005]

SUMMARY OF THE INVENTION Accordingly, a lifting magnet device for a hydraulic shovel according to claim 1 is mounted on a hydraulic shovel having hydraulic lines 8, 9 for circulating hydraulic oil through an attachment mounted on an arm 4. A lifting magnet device, wherein the magnet main body 11 is configured to be attached to the arm 4 by an attachment mounting structure, and the magnet main body 11 is provided with a hydraulic motor 15 connected to the hydraulic pipelines 8 and 9 by piping. A generator 16 driven by the hydraulic motor 15 and a control panel 17 of the generator 16 are mounted.

When this lifting magnet device is mounted on the arm 4 and hydraulic oil is circulated from the bogie side to the hydraulic lines 8, 9 of the arm 4, the hydraulic motor 15 rotates by this hydraulic pressure, and the generator 16 generates electric power. This power can be supplied from the control panel 17 to the magnet main body 11. Then, for example, by opening and closing a switch drawn from the control panel 17 to the swivel table or the like, the energization of the magnet main body 11 and the cutoff thereof are switched, thereby generating an electromagnetic force on the magnet main body 11 and adsorbing the work. And the operation of extinguishing the electromagnetic force to release the work.

In the lifting magnet device of the present invention, a bracket 13 is fixed to the magnet main body 11 via a shock absorbing device 14 for absorbing an impact, and a hydraulic motor 15, a generator 16, and According to a third aspect of the present invention, there is provided a lifting magnet device for a hydraulic shovel according to the third aspect, wherein the influence of the leakage magnetic flux on the control panel 17 is provided between the magnet body 11 and the bracket 13. It is characterized by providing an interval that can be prevented.

In this lifting magnet device, the shock applied to the magnet body 11 due to the suction and release of the work is absorbed by the shock absorber 14, so that the hydraulic motor 15, the generator 16, and the control panel 17 on the bracket 13 are absorbed.
Are protected from impact loads. In claim 3,
Malfunction due to leakage magnetic flux can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a lifting magnet device for a hydraulic shovel according to the present invention will be described in detail with reference to the drawings. 1 and 2
FIG. 1 is a view showing a lifting magnet device according to an embodiment of the present invention, and FIG. 3 is an overall view of a hydraulic shovel equipped with the lifting magnet device.

In FIG. 3, reference numeral 1 denotes a bogie of a hydraulic shovel,
2 is a swivel mounted on the trolley 1, 3 is a boom mounted on the swivel 2, 4 is an arm mounted on the boom 3, and rotates the swivel 2 as necessary.
The boom 3 and the arm 4 are swung in a vertical plane by expansion and contraction of a hydraulic cylinder and the like. The arm 4 and the link 4a are provided with through holes 5,5. On the other hand, through holes 6 and 6 are also provided in various attachments, for example, for excavation work and for cutting a structure, and the attachments are placed so that these through holes 5 and 6 match each other.
The attachment is mounted on the arm 4 by passing through the pin 7 and stopping. The arm 4 is provided with discharge-side and return-side hydraulic pipelines 8 and 9 for circulating hydraulic oil supplied from a hydraulic pump (not shown) mounted on the swivel 2 to the attachment. I have.

In FIG. 1 and FIG. 2, reference numeral 11 denotes a known magnet main body that generates an electromagnetic force when energized, and is configured to attract a work to a lower surface. A pair of school bags 1 made of a steel plate or the like are placed on the magnet body 11.
The through holes 6, 6 are provided near the upper ends of the school bags 12, 12, so that the magnet body 11 can be attached to the arm 4 via the pins 7. I have.

A hydraulic motor or the like is provided between the school bags 12 in the magnet main body 11. That is, the bracket 13 as shown in FIGS. 4 and 5 is fixed on the magnet main body 11 via the shock absorbers 14 for absorbing shock. The shock absorber 14 includes, for example, the magnet body 11 and the bracket 13
Fixing members 14a and 14b respectively fixed to
And an elastic member 14c such as rubber for connecting the fixing members 14a and 14b. As shown in FIGS. 4 and 5, on this bracket 13, a hydraulic motor 15, a generator 16 connected to the hydraulic motor 15 and driven by the hydraulic motor 15,
Control panel 17 is mounted. The magnet body 1
A gap of several tens of mm (40 to 50 mm in practical use) is provided between the control panel 17 and the bracket 13.
To prevent malfunction, thereby preventing malfunction. The electric power generated by the generator 16 is appropriately controlled by the control panel 17 and supplied to the magnet body 11.
A switch (not shown) for opening and closing this circuit is provided on the control panel 1
7 is drawn into the cab of the swivel 2. The flow control valve 1 is provided on the magnet body 11.
8 is fixed.

FIG. 6 shows a hydraulic circuit constituted by these hydraulic devices. In the figure, reference numeral 21 denotes a main valve for controlling the flow rate and the like of hydraulic oil supplied from the hydraulic pump, and a service valve 2 connected to the main valve 21.
The discharge-side hydraulic line 8 and the return-side hydraulic line 9 are connected to the zero discharge port and the return port, respectively. The discharge side hydraulic line 8 is connected to the inflow side port of the flow control valve 18 via the first hydraulic line 22, and the outflow side port of the flow control valve 18 is connected to the hydraulic motor via the second hydraulic line 23. 15, and the outlet port of the hydraulic motor 15 is connected to the return hydraulic line 9 via the third hydraulic line 24. As shown in FIGS. 1 and 2, the connection ends of the first hydraulic line 22 and the third hydraulic line 24 with the hydraulic lines 8, 9 are fixed to the school bags 12, 12, respectively. In addition, 2
5 is a main relief valve, 25a is a low pressure safety valve for attachment, 26 is a check valve, 27 is a cooler, and 28 is a return filter.

In the lifting magnet apparatus having the above structure, the magnet main body 11 is mounted on the arm 4, and the first hydraulic line 22 and the third hydraulic line 24 are connected to the hydraulic lines 8 and 9, and the hydraulic pump of the bogie 1 is connected. To hydraulic motor 15 of arm 4
Is supplied to the hydraulic motor 15, the hydraulic motor 15 rotates and the generator 1
6 generates power, and this power can be supplied from the control panel 17 to the magnet main body 11. Then, by energizing and shutting off the magnet main body 11 by opening and closing a switch, the electromagnetic force is generated in the magnet main body 11 to attract the work, and the electromagnetic force disappears to open the work. Operation is switched. Therefore, in the above embodiment, the arm 4 of the general-purpose hydraulic shovel is used as a lifting magnet device as one of the attachments.
It can be mounted on a, and it can be tailored to a lifting magnet specification with a simple attachment replacement work while using a general-purpose hydraulic excavator.

In the above embodiment, since the shock applied to the magnet body 11 due to the suction and release of the work is absorbed by the shock absorber 14, the hydraulic motor 15, the generator 16 and the control panel 17 on the bracket 13 are impacted. It is possible to protect from a load and to improve the earthquake resistance of the lifting magnet device.

[0016]

As described above, the lifting magnet device of the hydraulic excavator according to the first aspect of the present invention is provided with the magnet body for attracting and absorbing the work by the magnet body when the hydraulic device is mounted on the arm and the hydraulic pressure is supplied from the bogie to the hydraulic line of the arm. Since it can be opened, the lifting magnet device can be attached to the arm of a general-purpose hydraulic excavator as one of the attachments, and while using a general-purpose hydraulic excavator, it can be lifted by simply replacing the attachment. Can be tailored to magnet specifications.

According to the second aspect of the present invention, the shock received by the magnet main body due to the attraction and release of the work can be absorbed by the shock absorber, so that the hydraulic motor, the generator and the control panel on the bracket have a simple structure. It is possible to protect from an impact load and to improve the earthquake resistance of the lifting magnet device. In claim 3,
Malfunction due to leakage magnetic flux can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment in which a cover between school bags is removed.

FIG. 3 is a front view of a hydraulic shovel including the lifting magnet device of the embodiment.

FIG. 4 is a front view showing a hydraulic motor, a generator, and a control panel on a bracket in the embodiment.

FIG. 5 is a right side view of FIG. 4;

FIG. 6 is a hydraulic circuit diagram of the embodiment.

FIG. 7 is a schematic view showing a conventional example.

[Explanation of symbols]

 4 Arm 8 Hydraulic Pipeline 9 Hydraulic Pipeline 11 Magnet Body 13 Bracket 14 Shock Absorber 15 Hydraulic Motor 16 Generator 17 Control Panel

Claims (3)

[Claims] 1. A lifting magnet device mounted on a hydraulic shovel provided with hydraulic lines (8) and (9) for circulating hydraulic oil through an attachment mounted on an arm (4), comprising: 11) is configured to be attached to the arm (4) by an attachment mounting structure, and a hydraulic motor (1) is connected to the magnet main body (11) by piping to the hydraulic pipelines (8) and (9).
5) A lifting magnet device for a hydraulic shovel, comprising: a generator (16) driven by the hydraulic motor (15); and a control panel (17) of the generator (16). 2. A bracket (13) is fixed to the magnet body (11) via a shock absorbing device (14) for absorbing an impact, and the bracket (13) is provided with a hydraulic motor (15) and a generator ( The lifting magnet device for a hydraulic shovel according to claim 1, further comprising a control panel (17) and a control panel (17). 3. The effect of the leakage magnetic flux between the magnet body (11) and the bracket (13) is caused by a control panel (1).
3. The lifting magnet device for a hydraulic shovel according to claim 2, wherein an interval is provided so as to prevent the extension from reaching 7).