JPH09125439A - Magnetic device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attract metal trash, by fitting an attachment supporting a rotary body in which a magnetic body part and a non-magnetic body part are displaced to firmly join together, in a case with an attractive face and having a magnetically attractive body preventing divergence of the magnetic force to the outside by means of connection with the magnetic body part in the case, to the gyratory arm of a construction machine. SOLUTION: A non-magnetic body part 7 is provided in a magnetic body part 6 of a rotary body 3 pivotted by a magnet used as a case 1 in common through a stainless steel plate 25. An N-polar magnet piece 9 arranged at an eccentric position of the magnetic body part 6 and, an S-polar magnetic piece 10 arranged at the inside thereof, are parallelly and adjacently set inside. An attractive face 11 applied with a stainless steel plate 13 is provided on the right-angled face against the face of the magnetically attractive body 4 provided in the magnet used as the case in common. When the magnet pieces 9, 10 of N and S polars are positioned on the attractive face 11, the lines of magnetic force spread to the outside to attract metallic materials at the attractive face. The metallic materials are transferred to a specified position and then, when the rotary body 3 is turned by 90 degrees so that the magnetically attractive body 4 of the case coincides with the magnetic body part 6 of the rotary body 3, the metallic materilas fall down from the attachment 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic device applied to the tip of a swingable arm that can be bent and stretched in a civil engineering machine.

[0002]

SUMMARY OF THE INVENTION An object of the present invention is to provide a civil engineering machine equipped with a magnetic device capable of applying and releasing a magnetic force to an object suction surface by an extremely simple operation. .

[0003]

The means of the present invention are as follows. A rotating body that can rotate at least 90 ° by a rotating shaft is housed in a case, and the rotating body is composed of a central magnetic body portion and a pair of non-magnetic body portions joined to the left and right sides of the rotating body. The N pole magnet and the S pole magnet are arranged side by side in two rows to form a permanent magnet body, and one surface of the case in which the rotor is pivotally supported by the permanent magnet is an attracting surface, and the magnet and the attracting surface of the rotor are A magnetic device for civil engineering machinery, in which a magnetic attraction and release attachment, which is formed by installing a magnetic absorber inside the case to prevent the magnetic field lines from diverging to the outside when and are not matched, is attached to the swing arm.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION A metal adsorption / release attachment 100 attached to the tip of a swing arm 60 of a civil engineering machine has the following structure.

In the figure, reference numeral 1 is a case that also serves as a magnet.
A 90 ° rotatable metal rotating body 3 supported by a rotating shaft 2 is housed therein, and magnetic absorbers 4 and 4 are fixed to the left and right inner walls of the case 1. The rotating body 3 is composed of a magnetic body portion 6 at the center and a pair of non-magnetic body portions 7 joined to the left and right sides of the rotating body 3. The outer circumference of the rotating body 3 is formed into a circular shape 8. A concave arc surface 4'is formed along the surface. Further, an N-pole magnet piece 9 and an S-pole magnet piece 10 are arranged side by side, being biased to one side of the rotating body 3. Further, one surface perpendicular to the surface of the magnet / case 1 on which the magnetic absorber 4 is provided is an attraction surface 11, on which the stainless steel plate 1 is attached.
Give 3.

[0006]

In the embodiment shown in FIGS. 1 to 8, a rotating body 3 pivotally mounted on a case 1 which also serves as a magnet by a rotating shaft 2 is circled through stainless steel plates 25 on the left and right sides of a magnetic body 6 made of a magnetic absorbing metal. It is configured by providing a non-magnetic material portion 7 of a stainless material having an arcuate outer peripheral surface.

At the eccentric position of the metal magnetic body portion 6, an N pole magnet piece 9 is placed.
The S pole magnet pieces 10 are lined up inside and the interior is installed. In this embodiment, the outer circumference of the rotor 3 is formed into a circular shape, and the tips of the magnetic absorbers 4 and 4 on the inner surface of the case 1 are arcuate concave surfaces 4 '. In the magnet / case 1, a surface perpendicular to the surface on which the magnetic absorber 4 is provided is an attraction surface 11 formed by stretching a stainless steel plate 13,
When the N and S pole magnet pieces 9 and 10 are on the attracting surface 11, the lines of magnetic force are emitted to the outside to attract metals such as rebar scraps on the attracting surface,
After being carried to a predetermined position as it is, the rotating body is rotated by 90 ° to make the magnetic absorbing parts 4 and 4 of the case coincide with the magnetic body part 6 of the rotating body. Fall more. The case 1 has a swing arm 6
Hydraulic cylinder 15 fixed to the end of 0, arm 14 protruding from the rotating shaft 2, mounted on the case 1, and operated in the driver's seat
Connect the piston rod 16 to the arm 14 to rotate the rotating body 3 by 90 degrees.
Rotate the magnetic field lines to the outside (Fig. 3) or keep them out (Fig. 5). Thus, the metals discarded at construction sites, dismantling sites, etc. are treated. At that time, the stainless non-magnetic body portion 7 receives the impact on the case 1,
Protect the whole.

In the second embodiment of FIG. 9, a crusher 200 is provided with a metal adsorption / release attachment 100. An arm 14 is attached to a rotary shaft 2 protruding from the case 1, and an arm 14 is attached.
The piston rod 16 of the hydraulic cylinder 15 protruding from the end is connected to operate the hydraulic cylinder 15 in the driver's seat to rotate the rotating body 3 by 90 ° to perform the same operation as described above.

Further, FIG. 10 also shows that the attachment 100 is mounted on the crusher 200, the rotating piece 32 having the elongated hole 13 is fixed to the rotary shaft 2, and the movable crushing tooth is operated by the hydraulic cylinder 33 with the shaft 34 as the fulcrum. A moving piece 37 engaging with the elongated hole 31 of the rotating piece 32 on an extension piece 36 opposite to the shaft 34 of 35.
The movable crushing tooth 35 by operating the hydraulic cylinder 33.
Is used to crush concrete lumps and stones, and at the same time adsorb the reinforcing steel and other metal debris.

FIG. 11 shows a frame 38 of a crusher comprising a crushing arm 35 operated by a hydraulic cylinder 33 and a frame 38 supporting the crushing arm 35, on which a metal adsorption / release attachment 100 is detachably attached by a bolt nut 39. Although not shown in the figure, the attachment 100 is provided with a rotary shaft actuating hydraulic cylinder similar to that of the above embodiment. The attachment 100 is removed when not in use to reduce the weight of the crusher.

In the example of FIG. 12, the attachment 1 is attached to a bucket 40 for scooping concrete lumps, asphalt, stones and the like.
00 is attached so that metal scraps can be absorbed. Thus, the utility value as a bucket is improved.

The hydraulic cylinders shown in all of the above embodiments are connected to the inside of the driver's seat by a hydraulic hose 300 and operated by the driver.

[0013]

[Effect] According to the present invention, by operating the rotating shaft, a strong magnetic force can be sent to and from the adsorption surface, and the reinforcing bar scraps and other metal scraps at the site of building demolition can be suctioned. Therefore, the initial purpose can be achieved very easily and surely. When the swing arm of the civil engineering machine is operated to move the crusher etc. up and down, the metal adsorption and release attachments are impacted, but in that case, a strong non-magnetic material such as stainless steel is attached to the lower adsorption surface. Since they face each other, they can withstand impact force well and prevent internal damage.In addition, since the rotating body with permanent magnets is operated by the hydraulic cylinder operated in the driver's seat, there is no need to manually switch the permanent magnets one by one, and work is smooth. It is an easy idea and a fruitful idea that combines performance and strength as an attachment for civil engineering machinery.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment.

FIG. 2 is a side view of a main part.

FIG. 3 is a vertical cross-sectional front view when adsorbing and releasing metal lines of magnetic force of an attachment.

FIG. 4 is a vertical cross-sectional side view when adsorbing and releasing metal lines of magnetic force of an attachment.

FIG. 5 is a bottom view with a stainless steel plate removed.

FIG. 6 is a vertical sectional front view of the attachment in a state where magnetic force lines are not emitted to the outside.

FIG. 7 is a vertical cross-sectional side view of the attachment in a state where magnetic lines of force are not emitted to the outside.

FIG. 8 is a cross-sectional plan view.

FIG. 9 is a side view of the second embodiment.

FIG. 10 is a side view of the third embodiment.

FIG. 11 is a side view of the fourth embodiment.

FIG. 12 is a side view of the fifth embodiment.

[Explanation of symbols]

 100 Attachment 1 Case that also serves as a magnet 2 Rotating shaft 3 Rotating body 4 Magnetic absorbing body 6 Magnetic material portion 7 Non-magnetic material portion 11 Adsorption surface

Claims (5)

[Claims] 1. A magnetic device for a civil engineering machine, in which a metal adsorption / release attachment comprising a combination of the following three elements (a), (b) and (c) is attached to the tip of a revolving arm. (A) A rotating body capable of rotating at least 90 ° by a rotating shaft is housed in a case, and the rotating body is composed of a magnetic body portion at a central portion and a pair of non-magnetic body portions joined to the left and right sides thereof. (B) An N-pole magnet and an S-pole magnet are arranged in two rows side by side in an eccentric position of the magnetic body portion to form a permanent magnet body, and one surface of the case that pivotally supports the rotating body of the permanent magnet is used as an attraction surface. (C) A magnetism absorber is provided inside the case to prevent the magnetic force lines from diverging to the outside when the magnet of the rotor and the attraction surface do not match. 2. The crusher at the tip of the swivel arm is equipped with a metal adsorption / release attachment, and the rotary shaft of the permanent magnet rotor attached to the attachment is connected to a hydraulic cylinder operated in the driver's seat. Magnetic equipment of civil engineering machinery. 3. An extension arm of a movable crushing tooth of a crusher in which a metal magnet adsorption / release attachment is attached to a crusher at the tip of a swivel arm, and a rotary shaft of a permanent magnet rotating body attached to the attachment is operated by a hydraulic cylinder. Claim 1
The magnetic device of the described civil engineering machine. 4. A magnetic device for a civil engineering machine according to claim 1, wherein a metal adsorption and release attachment is detachably attached to the crusher. 5. A magnetic device for a civil engineering machine according to claim 1, wherein a suction attachment and a release attachment of metals are attached to a bucket attached to the tip of the revolving arm.