JP2000303704A - Crusher with magnet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency without requiring to change an attitude when performing crushing work and when performing attracting work by installing a link bracket of a crusher with a magnet at the tip part of an arm of a construction vehicle, and crushing a crushing object by be interposingly pressing between the upper jaw and the lower jaw. SOLUTION: A magnet device 10 is provided on the under surface 8 side of the lower jaw 4 via a magnet bracket 11. The magnet device 10 is an electromagnet, and attracts and separates magnetic substance scrap by switching of ON/OFF of a power source. When performing crushing work, a crushing object is crushed by being interposingly pressed between a crushing tooth 6 of the lower jaw 4 and a crushing surface 7 of the upper jaw 3 opposed to this lower jaw. When performing attracting work, the lower jaw 4 is put in a closed state, and the magnetic substance scrap is attracted. Thus, there is no need to change an attitude when performing crushing and when performing attraction, abrasion of the magnetic device is prevented to eliminate restriction of the size, and attracting performance can be improved to improve the working efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher mounted on a construction vehicle and used for dismantling constructions, and more particularly to crushing of crushed objects such as reinforced concrete and rocks, as well as magnetic properties of reinforced iron pieces and the like. The present invention relates to a magnet crusher capable of collecting and collecting body waste by a magnet.

[0002]

2. Description of the Related Art In general, a crusher mounted on a construction vehicle such as a hydraulic excavator is used to dismantle a building and effectively recover concrete aggregate and iron resources therefrom. The crusher crushes concrete and rock finely to reuse it as concrete aggregate, etc., but the large amount of magnetic waste materials such as reinforcing bars and bolts generated therefrom is completely used for effective reuse of concrete aggregate. Must be collected separately.

In the past, this sorting work was performed manually, but recently, it has become common to use a crusher with a magnet to adsorb and collect the magnetic waste material with the magnet. As shown in FIG. 14, a conventional magnet crusher 51 includes an upper jaw 53 and a lower jaw 54 for crushing on a main body 52 having a link bracket 62.
A hydraulic cylinder (not shown) for opening and closing operation is attached between the main body 52 and the lower jaw 54 to make the lower jaw 54 a movable jaw, and the crushing teeth 56 and the upper jaw 53 which is a fixed jaw opposed thereto are crushed. It is configured to crush the object to be crushed with the surface 57, and the magnet device 60 is mounted on the upper surface 59 side of the upper jaw 53, which has ample space.

When a building is dismantled using the magnet crusher 51, as shown in FIG. 15, a link of the magnet crusher is provided at the tip of the arm 22 of the power shovel 20 instead of a bucket. A bracket 62 is attached, and the material to be crushed C is crushed by the crushing teeth 56 of the lower jaw 54 and the upper jaw 53 opposed thereto.
Between the crushing surface 57 and the crushing surface 57. At this time, in the crusher 51 with magnet, the tip side of the upper jaw 53 faces downward,
Are held substantially perpendicular to the ground G.

When the magnetic waste material is adsorbed, the crusher 51 with the magnet is set so that the distal ends of the upper jaw 53 and the lower jaw 54 face rearward (rightward in the figure) as shown in FIG. Rotate it 90 degrees counterclockwise to move the magnet device 6
The posture is changed so that the upper surface 59 equipped with “0” faces the ground G.

[0006]

However, in this crusher with magnet 51, since the magnet device 60 is provided on the upper surface 59 side of the upper jaw 53, if the crusher with magnet 51 is set to this position, the magnetic waste material is removed. Is blocked by the tip of the upper jaw 53, making it difficult for the operator of the power shovel 20 to see, making it difficult to perform positioning when performing suction, and making it impossible to confirm how much magnetic waste material has been sucked.

In this position, the bucket cylinder 23 of the power shovel 20 for rotating the crusher 51 with magnet is rotated.
Is extended to the stroke end, so if the tip of the magnet crusher 51 is erroneously pressed downward, the magnet crusher 51 is rotated counterclockwise as shown in FIG. A force acts in a direction in which the bucket cylinder 23 is pulled out, and the bucket cylinder 23 is damaged.

Further, as shown in FIG. 18, the crushing operation can be performed over a wide range by extending the boom 21 and the arm 22, whereas the suction operation is performed by turning the distal ends of the upper jaw 53 and the lower jaw 54 backward. Since the posture must be such that 60 is on the lower side, the work radius is reduced, and work can be performed only in a narrow range. In addition, when the posture is changed, the boom 21 and the arm 22 must be temporarily lifted, and then the bucket cylinder 23 must be extended to rotate the magnet crusher 51, which is troublesome and time-consuming. Efficiency decreases.

The crushing machine 51 with a magnet needs to perform not only the crushing and suction work but also the work of scraping the crushed material C by using the upper jaw 53. The scraping operation is roughly divided into a longitudinal scraping as shown in FIG. 19 and a lateral scraping as shown in FIG.
3 is used to directly scrape the crushed material C. Accordingly, if the upper jaw 53 is equipped with the magnet device 60, the magnet device 60 is exposed to constant wear, and regular maintenance is required.

In order to increase the durability against abrasion, it is optimal to incorporate the magnet device 60 in the upper jaw 53. In this case, as shown in FIG. Abrasion-resistant measures are indispensable for the adsorption surface. As shown in FIG.
There is also an example in which it is provided so as to protrude from the upper surface 59 to prohibit scraping work. However, in this case, the moment of the magnet crusher 51 is large, the load on the power shovel 20 becomes excessive, and the scraping work cannot be performed. However, even if the adsorption performance is improved, the efficiency of the original crushing operation is reduced.

The present invention solves the above-mentioned problem in a crusher with a magnet, and it is not necessary to change the posture between the crushing operation and the suction operation, and the crushing posture is changed from the crushing posture to the suction posture. This eliminates the need for time, expands the work range during suction work, makes it easy for the operator to see the magnetic waste material when performing suction work, accurately positions the magnet device, and eliminates the possibility of damage to the bucket cylinder, making operation easier. It is an object of the present invention to provide a crusher with a magnet that is easy, prevents wear of a magnet device, eliminates a limitation in size, improves adsorption performance, and improves work efficiency.

[0012]

According to the present invention, in order to solve the above-mentioned problems, in a crusher in which a main body having a link bracket is provided with an upper jaw and a lower jaw for crushing, a magnet device is provided on a lower surface side of the lower jaw. ing. When dismantling the building using this magnet crusher, attach the magnet crusher link bracket to the tip of the arm of the construction vehicle,
The object to be crushed is pinched and crushed between the upper jaw and the lower jaw.

In this crusher with magnet, since the magnet device is provided on the lower surface side of the lower jaw, the magnetic material waste can be adsorbed in the same posture as when crushing. Therefore, it is not necessary to change the posture between when crushing and when performing suction, and the working range when performing the suction work is expanded, and the magnetic waste material can be easily seen by the operator, and the magnet device can be accurately positioned. The operation is easy without the possibility of damage to the bucket cylinder. In addition, it is possible to prevent wear of the magnet device, eliminate the limitation on the size, improve the suction performance, and improve the work efficiency.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a crusher with magnet showing one embodiment of the present invention, FIG. 2 is an explanatory view of a mounting structure of a magnet device, and FIG. FIG. 4 is an explanatory view of a posture during crushing operation of the crusher with magnet, FIG. 5 is an explanatory diagram of a posture during suction operation of the crusher with magnet, and FIG. 6 is a boom and an arm of a power shovel. FIG. 7 is an explanatory diagram of a suction operation in a state where is extended to the maximum.

Here, the crusher with magnet 1 has an upper jaw 3 and a lower jaw 4 for crushing provided on a main body 2 having a link bracket 12. The upper jaw 3 is a fixed jaw fixed to the main body 2. A hydraulic cylinder 5 for opening and closing operation is mounted between the main body 2 and the lower jaw 4, and the lower jaw 4 is a movable jaw. Between the crushing teeth 6 and the crushing surface 7 of the upper jaw 3 opposed thereto. The crushing object C is configured to be crushed.

A magnet bracket 11 is provided on the lower surface 8 of the lower jaw 4.
Is provided with the magnet device 10 via the. Magnet device 10
Is an electromagnet, and the magnetic waste material I can be adsorbed and desorbed by switching the power on and off. In addition, as shown in FIG. 2, the magnet device 10 has a structure in which a part of the constituent members of the lower jaw 4 is used as a casing 13 of the magnet device 10 and a core 14 is stored therein and fixed with bolts 15. Can be reduced.

When performing the crushing operation, as shown in FIG. 3, the link bracket 12 of the crusher 1 is attached to the tip of the arm 22 of the power shovel 20 instead of the bucket, and the crushed material C is moved to the lower jaw 4. Between the crushing teeth 6 of the upper jaw 3 and the crushing surface 7 of the upper jaw 3 opposed thereto. At this time, the magnet crusher 1 is held in such a posture that the tip side of the upper jaw 3 faces downward and the upper jaw 3 is substantially perpendicular to the ground G as shown in FIG.

When performing the adsorption operation, the crusher with magnet 1 is in the same posture as the crushing, the lower jaw 4 is closed as shown in FIG. 5, the power supply of the magnet device 10 is turned on, and the magnet unit 10 is excited to adsorb the magnetic waste material I. It should be done. Therefore, it is possible to quickly shift to the adsorption operation without taking time to change the posture of the crusher with magnet 1. The adsorbed magnetic waste material I is transferred to the magnet-equipped crusher 1 to a predetermined position,
Is demagnetized to be separated and collected.

At the time of adsorption, since the magnet device 10 is clearly visible to the operator of the power shovel 20, a part of the magnetic waste material I is buried in the material C to be crushed after being adsorbed and cannot be sufficiently adsorbed. Occasionally, it is possible to slightly change the posture and scrape the crushed object C at the end of the crusher 1 with magnet, and perform an operation of adsorbing again, so that a fine-grained adsorption operation can be performed.

Since the magnet crusher 1 does not need to be largely rotated so that the upper surface 9 of the upper jaw 3 faces the ground G during the suction operation, it is not necessary to extend the bucket cylinder 23 to the stroke end. Also, there is no possibility of damaging the bucket cylinder 23. Also, the suction operation is performed as shown in FIG.
As shown in (2), the operation can be performed even when the boom 21 and the arm 22 of the power shovel 20 are fully extended, so that the working range is expanded.

FIG. 7 shows the working range of the magnet crusher 1 and the conventional magnet crusher 51 in comparison. In the conventional magnet crusher 51, the possible range of the crushing operation is the point P
₅ to P is between _6, the possible range of the adsorption operation point P ₇ to P
Between _eight . Therefore, also possible ranges either crushing operation and the suction operation is only between the points P ₇ to P _6, excavators 2 when the operator for switching between suction work and crushing work
0 must be moved back and forth.

On the other hand, in the crusher 1 with magnets, the possible range of the crushing operation is between the points P _{1 and} P ₂ , and the possible range of the suction operation is between the points P _{3 and} P ₄ . Therefore, also possible ranges either crushing operation and the suction operation is between the points P ₃ to P _2, can be performed both crushing operation and adsorption working in a wide range, necessary to move the power shovel 20 Almost no work can be done in cooperation with a wheel loader or the like that carries out the crushed material C to be crushed, and work can be performed efficiently.

As shown in FIG. 8, when the crushed object C which is indispensable in the crushing operation is to be raked, the lower jaw 4 is kept open so that the magnet device 10 can be used to crush the ground G or the crushed object. There is no contact with C, and there is no risk of wear or damage. Therefore, it is not necessary to keep the magnet device 10 smaller than the width of the lower jaw 4, and a larger magnet device 10 can be provided, and the attraction performance can be improved.

As shown in FIG. 9, a magnet device 10
In conventional with magnets crusher 51 equipped with a horizontal distance L ₅ between the center of gravity 66 of the working position in the link bracket 62 and the magnet device is rotated around 60 is large. The crusher with magnet 1 equipped with the magnet device 10 in the lower jaw 4 includes a link bracket 12 that is a rotation center in a working posture and a center of gravity 1 of the magnet device 10.
6, the horizontal distance Ll between the magnet crusher 1 and the magnet crusher ₁ is small.
Is reduced in the counterclockwise direction in the figure, and the load on the power shovel 20 can be reduced.

As shown in FIG. 10, a magnet device 1 is attached to the lower jaw 4.
When equipped a 0 is much higher than the maximum lifting height H ₅ of the magnetic body wastes I when maximum lifting height H _l of the adsorbed magnetic waste I is equipped with a magnet system 10 in a conventional upper jaw 3 since, it is possible loading of the high loading platform height H ₂ of the dump truck 25 or the like which has heretofore been impossible vehicle.

Further, as shown in FIG. 11, even when the magnetic waste materials I are temporarily accumulated, the work in which the lower jaw 4 is equipped with the magnet device 10 is more difficult than the work in which the upper jaw 3 is equipped with the magnet device 10. Since the radius is large, it is possible to accumulate farther and to accumulate a large amount. Fig. 12 and Fig. 13 are side views of a magnet crusher showing another embodiment of the present invention. The crusher 31 with magnet of FIG.
The lower jaw 34 is a movable jaw, and the magnet crusher 4 shown in FIG.
1 has an upper jaw 43 as a movable jaw and a lower jaw 44 as a fixed jaw.
The magnet device 10 is provided via the magnets 5 and 45, and the same effect as the magnet crusher 1 of FIG. 1 can be obtained. Lower jaws 34, 44, magnet brackets 35, 45 and magnet device 1
It is desirable to make it integrally with 0 for weight reduction.

[0027]

As described above, in the crusher with magnet of the present invention, since the magnet device is provided on the lower surface side of the lower jaw, the suction of the magnetic waste material remains in the same posture as when crushing. Can be done with Therefore, it is not necessary to change the posture between when crushing and when performing suction, and the working range when performing the suction work is expanded, and the magnetic waste material can be easily seen by the operator, and the magnet device can be accurately positioned. The operation is easy without the possibility of damage to the bucket cylinder. In addition, it is possible to prevent the magnet device from being worn and eliminate the limitation on the size, thereby improving the attraction performance. The workability of loading the magnetic waste material is good, and the work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a crusher with a magnet showing one embodiment of the present invention.

FIG. 2 is an explanatory view of a mounting structure of a magnet device.

FIG. 3 is a side view showing a state in which the crusher with a magnet is mounted on a power shovel.

FIG. 4 is an explanatory view of the posture of the crusher with magnet during crushing operation.

FIG. 5 is an explanatory view of a posture of the crusher with a magnet during an adsorption operation.

FIG. 6 is an explanatory view of a suction operation in a state where a boom and an arm of the power shovel are extended to a maximum.

FIG. 7 is an explanatory diagram showing a comparison of the working ranges of the magnet crusher of the present invention and a conventional magnet crusher.

FIG. 8 is an explanatory diagram of a posture when a crushed object is scraped by a crusher with a magnet.

FIG. 9 is an explanatory view showing a comparison of the moment of the magnet device in the working posture of the magnet crusher of the present invention and the conventional magnet crusher.

FIG. 10 is an explanatory diagram showing a comparison of the maximum lifting height of magnetic waste material between the magnet crusher of the present invention and a conventional magnet crusher.

FIG. 11 is an explanatory diagram showing a comparison of the working range of the magnetic crusher of the present invention and the conventional magnet crusher at the time of accumulating magnetic waste materials.

FIG. 12 is a side view of a magnet crusher showing another embodiment of the present invention.

FIG. 13 is a side view of a crusher with a magnet showing another embodiment of the present invention.

FIG. 14 is a side view of a conventional crusher with a magnet.

FIG. 15 is a side view showing a posture during crushing work of a conventional crusher with a magnet.

FIG. 16 is an explanatory view of a change in posture for a suction operation of a conventional crusher with a magnet.

FIG. 17 is an explanatory diagram of a state in which a bucket cylinder is damaged by a conventional magnet crusher.

FIG. 18 is an explanatory diagram of a work range of a conventional magnet crusher during crushing operation and at the time of suction operation.

FIG. 19 is an explanatory view of a scraping operation of a conventional magnet crusher.

FIG. 20 is an explanatory diagram of a scraping operation of a conventional magnet crusher.

FIG. 21 is an explanatory view of a mounted state of a small-sized magnet device of a conventional magnet crusher.

FIG. 22 is an explanatory view of a state in which a large-sized magnet device of a conventional magnet crusher is equipped.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crusher 2 Main body 3 Upper jaw 4 Lower jaw 5 Hydraulic cylinder 6 Crushing tooth 7 Crushing surface 8 Lower surface 9 Upper surface 10 Magnet device 11 Magnet bracket 12 Link bracket 13 Casing 14 Core 20 Power shovel 22 Arm 23 Bucket cylinder C Crushed object G Ground I Magnetic waste

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H01F 7/06 H01F 7/06 Z (72) Inventor Yasuo Asano 3 Mizuhodai, Oamishirasato-cho, Sanmu-gun, Chiba −28− 11 (72) Inventor Tsutomu Uematsu 1-1-2 Minami 1-Jigashi, Ashibetsu-shi, Hokkaido F-term (reference) 2D012 DA02 DA03 2E176 AA01 DD05 DD58 DD59 DD62 4D063 AA06 AA18 GA07 GA10 GC21 5E048 AA08 AB10

Claims (1)

[Claims] 1. A crusher provided with an upper jaw and a lower jaw for crushing on a main body having a link bracket, wherein a magnet device is provided on a lower surface side of the lower jaw.