JPH11311030A - Magnet device for demolition work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by rotating a crank with a link interlocked with the rotary arm of a demolition work machine, and moving a permanent magnet near to or apart from an attracting face. SOLUTION: A permanent magnet 19 is liftably stored in a housing 16 having an attracting face 18 transmitting magnetic lines of force at a bottom section, one end of a bell crank 20 pivotally fitted to the side wall of the housing 16 is connected to the magnet 19, the other end is connected to a link 25 to form a magnet device 15, and the magnet device 15 is removably fitted to a crusher 1 via a pin 29. When a rotary arm 4 is opened, the link 25 is made free, the magnet 19 is lowered by its tare weight, and it approaches the attracting face 18 to attract scraps. A horizontal lug 27 is brought into contact with the upper end section 26 of the link 25 to push down the link 25 approximately at the terminal end of the closing process of the arm 4, the crank 20 is rotated to separate the magnet 19 from the attracting face 18, and scraps are released. If the magnet device 15 is removed during the crushing work, a demolition work machine is made lightweight, and the crushing work can be conducted efficiently and stably. The magnet 19 is lifted or lowered in the horizontal state, and scraps can be effectively attracted or released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet device for a dismantling work machine attached to a work cart such as a hydraulic shovel, and furthermore, various dismantling devices capable of adsorbing and collecting iron scraps generated at a dismantling site by mounting the magnet device. Work equipment.

[0002]

2. Description of the Related Art As a dismantling work machine attached to a hydraulic excavator, there is a model capable of adsorbing and collecting iron chips at a dismantling site by attaching and fixing a magnet body to an apparatus body. JP-A-8-284434 and JP-A-9-125439 are prior arts in which a permanent magnet is built in and fixed.
658 can be exemplified.

In Japanese Utility Model Laid-Open No. 43658/1992, it is necessary to attach a power supply device and a power supply cable to a hydraulic shovel by providing an electromagnet. On the other hand, in JP-A-8-284434 and JP-A-9-125439, since a permanent magnet is moved closer to and away from an attraction surface in conjunction with opening and closing of a rotating arm via a hydraulic cylinder or the like, dismantling work alone is performed. Even in the case of, there is a possibility that the permanent magnet may approach and adsorb the iron swarf, not only there is a risk that the adsorbed swarf falls during the crushing work, but also the adsorbed swarf may interfere with the crushing work .

[0004]

In any of the dismantling work machines, a large and strong magnet is required regardless of its size and capacity in order to efficiently perform the work of absorbing and collecting iron chips. Since the magnet body requires a space for accommodating the magnet body, the main body frame is large and wide, and the overall weight increases. In addition, since the weight of the magnet body itself is added, particularly in a dismantling work machine for a small hydraulic shovel, a problem that the magnet device deteriorates the workability during normal dismantling work is likely to occur.

[0005] Further, from the viewpoints of stability and operability of the hydraulic excavator, there are certain restrictions on the size and weight of the dismantling work machine. In particular, in a dismantling work machine for a small hydraulic excavator, an increase in weight due to the built-in magnet body significantly affects workability in work other than the adsorption and collection of iron chips, and reduces work efficiency. In the conventional magnet device, the magnet body cannot be removed at the time of unnecessary dismantling work, and it is practically difficult to manufacture a practical machine with a small dismantling work machine.

The present invention solves the problem of weight increase due to a magnet body, and is particularly effective when applied to a small-sized excavator for a hydraulic excavator. SUMMARY OF THE INVENTION An object of the present invention is to provide a magnet device which can be easily attached and detached according to the work content, when attaching to a dismantling work machine, there is no need for an auxiliary facility such as a power supply facility for magnets, a control panel and a hydraulic cylinder for driving magnets. It is to provide. Another object of the present invention is to provide a magnet device that obtains a stable attracting force by approaching / separating while keeping the bottom surface of the magnet parallel to the attracting surface. Another object of the present invention is to provide a dismantling work machine that can easily mount a magnet device and perform an operation of sucking and collecting iron chips.

[0007]

In order to achieve the above object, a magnet device according to the present invention is used by being detachably mounted on a dismantling work machine attached to a work cart such as a hydraulic shovel. In this case, at least one of both opposing arms only needs to rotate. In this specification, a dismantling work machine refers to a working machine used for dismantling concrete structures, wooden houses, and the like, and includes a so-called crusher (see FIG. 1), a gripper (see FIG. 4), a reinforced steel cutting machine, It includes a double-arm type concrete crusher, concrete crusher and the like.

As shown in FIGS. 1 to 3, a magnet device according to the present invention includes a housing having a suction surface at the bottom portion through which lines of magnetic force pass, a permanent magnet housed in the housing so as to be able to move up and down, and the permanent magnet. And a drive link connected to the other end of the crank and rotatably supported by the side wall of the housing. In the magnet device, when the housing is attached to the dismantling work machine, the link is moved up and down by the rotating arm of the dismantling work machine or its attached member, so that the link is interlocked with the opening and closing operation of the rotating arm. Rotate the crank to move the permanent magnet toward and away from the attracting surface. In this magnet device, a plurality of pin holes are provided in a connection portion above the housing, and pins are inserted into and fixed to the respective pin holes, so that the connection portion above the housing is fixed or a rotating arm of the dismantling work machine. Attach to

Further, as shown in FIGS. 4 to 6, the magnet device of the present invention comprises a housing having a suction surface at the bottom portion through which lines of magnetic force pass, and a permanent magnet housed in the housing so as to be able to move up and down.
It may be constituted by a bell crank having one end connected to the permanent magnet and rotatably supported by the side wall of the housing. In the magnet device, in a state where the housing is attached to the dismantling work machine, the turning arm of the dismantling work machine or its attached member pushes down the other end of the bell crank, and is linked to the opening and closing operation of the turning arm. By rotating the bell crank, the permanent magnet approaches and separates from the attraction surface.

In the magnet device of the present invention, an auxiliary link having substantially the same length as the lever on the magnet side of the crank may be disposed substantially in parallel with the lever, and both ends of the auxiliary link may be formed by the permanent magnet and the side wall of the housing. When the crank rotates, the bottom surface of the permanent magnet moves up and down substantially in parallel with the attraction surface of the housing when the crank rotates. In addition, a plurality of auxiliary links having the same length are arranged almost in parallel to the permanent magnet, and both ends of each auxiliary link are axially mounted on the permanent magnet and the side wall of the housing, respectively. Due to the interposition, when the crank rotates, the bottom surface of the permanent magnet moves up and down substantially in parallel with the housing suction surface.

According to the present invention, in a crusher that is attached to a work cart such as a hydraulic shovel and at least one of the opposing arms rotates, a magnet device is detachably mounted on one arm, and the other arm is closed by an arm. Near the end of the stroke, it comes into direct or indirect contact with the link upper end of the magnet device, and the pressing unit moves up and down the permanent magnet via the drive link and the bell crank in conjunction with the opening and closing of both arms.

Further, according to the present invention, in a gripper for dismantling which is attached to a work cart such as a hydraulic shovel and has a pair of rotating arms, a magnet device is detachably mounted on one of the rotating arms, The other rotating arm directly or indirectly contacts the other end of the bell crank near the end of the closing stroke of the rotating arm, and moves the permanent magnet up and down via the bell crank in conjunction with opening and closing of both rotating arms. Move.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, a magnet device 15 according to the present invention has a hollow housing 16 having a suction surface 18 made of a nonmagnetic material through which lines of magnetic force penetrate, and a hollow housing 16 inside the housing. A plate-shaped permanent magnet 19 housed in a vertically movable manner, a bell crank 20 having one end connected to the permanent magnet and rotatably supported by a casing side wall, and a rod-shaped link connected to the other end of the crank 25. Generally, the casing 16 has both side walls extending upward to form connecting portions 17, 17. Pins 29 are inserted into pin holes 28, 28 provided in the connecting portions, and pinned to the crusher 1. It is preferable that the magnet device can be easily attached and detached in a short time, and the magnet device may be attached with a plurality of bolts instead of pinning.

In the magnet device 15, the bell crank 2
0 may be a bell crank having an obtuse bending angle as shown in the figure or a substantially linear crank (not shown). The fulcrum of the bell crank 20 is a crankshaft 21 inserted into the through holes 12 formed in the side wall of the housing 16. The linear crank may be, for example, axially attached to a permanent magnet via a long hole, and may be provided with an auxiliary link as shown in FIG.

Drive link 25 connected to crank 20
As shown in the figure, in addition to the upper end contacting the attachment member 27 of the rotating arm 4, the upper end is bent inward to directly contact the rotating arm 4 or the upper end of the link 17. The parts may be connected to form an inverted U shape as a whole. The attachment member 27 is a horizontal projection or a pin fixed to the tip of the rotating arm 4. Although not shown, a hook portion or an annular portion that is locked to the attachment member 27 of the rotating arm 4 is provided at an upper end portion of the driving link, so that the rotating arm 4 is provided.
It is also possible to adopt a structure in which the permanent magnet 19 is in contact with the attraction surface 18 at the time of opening. This drive link includes a permanent magnet 1
An elastic body (not shown) may be fitted to alleviate the impact when the 9 contacts the suction surface 18.

The dismantling work machine to which the magnet device 15 is attached
For example, the crusher 1 includes a fixed arm 3 protruding forward from below the main body frame 2 and a rotating arm 4 facing the fixed arm. As an applicable dismantling work machine,
Not only the crusher 1 for crushing concrete waste material, but also a two-rotation type crusher in which both arms rotate together, a gripper 30 for dismantling a wooden or mortar building or processing scrap, (FIG. 4), A reinforced steel frame cutting machine (not shown) can be exemplified.

The magnet device 45 shown in FIGS. 4 to 6 is preferably mounted on one arm 33 of the dismantling gripper 30 having a pair of curved arms 33 and 34, for example. In this gripper 30, when the rotating arms 33 and 34 are closed, as shown in FIG. 5, both ends of the arms intersect and the end of the arm 34 is located beside the magnet device 45, as shown in FIG. The drive link 25 in the magnet device 15 is not necessary, but a bell crank 50 is always used. In the magnet device 45, the tip side surface 43 of the rotating arm 34 may directly push down the other end portion 54 of the bell crank 50, or the attached member on the side surface may push down the bell crank end portion 54,
In any case, the bell crank 50 is directly rotated by the rotating arm 34.

[0018]

EXAMPLES Next, the present invention will be described based on examples, but it should be understood that the present invention is not limited to the examples, and there are various embodiments. 1 to 3
The crusher 1 which is a dismantling work machine shown in FIG. 1 has a vertically long main body frame 2, a fixed arm 3 protruding forward from below the main body frame 2, and a rotating arm 4 facing the fixed arm. In the vicinity of the base of the fixed arm 3, the pivot arm 4 has its rear end pivotally connected to the main body frame 2 with a pin 8, and the both ends of the hydraulic cylinder 5 housed in the frame with pins 6,
At 7, the upper part of the rotating arm 4 and the rear part of the main body frame 2 are rotatably connected. The upper part of the main body frame is a bracket part formed through a pair of pin holes 9,9.

A piping system (not shown) to the hydraulic cylinder 5 is installed along a arm 66 from a drive pump (not shown) mounted on a hydraulic shovel 65 (FIG. 7), and a hydraulic connection 10 and a hydraulic pressure in the main body frame 2 are provided. It is connected via a hose (not shown). The drive oil for the hydraulic cylinder 5 is supplied from a drive pump (not shown) mounted on the hydraulic shovel, and when a pedal or lever installed in the cab of the hydraulic shovel 65 is operated, a valve (not shown) interlocked with these is opened and closed. Thus, the rotating arm 4 can be moved toward and away from the fixed arm 3. By the expansion and contraction operation of the hydraulic cylinder 5, concrete waste material and the like can be bitten between the crushing arms 3 and 4 and crushed.

In the bracket portion above the main body frame,
A pair of pin holes 9, 9 are formed to penetrate, the pin holes of the arm 66 and the bucket link 67 of the hydraulic excavator 65 (see FIG. 7) are aligned with the respective pin holes, and the pins 69, 69 are inserted into the crusher. 1 is attached to the excavator 65. As a result, the crusher 1 can be rotated in the front-rear direction when the bucket cylinder 68 of the excavator 65 is extended and retracted, and can be crushed in an arbitrary posture by moving by turning and traveling of the excavator 65.

The magnet device 15 detachably attached to the lower end of the crusher 1 includes a rectangular hollow housing 16 having a flat bottom surface serving as an adsorption surface 18, and a plate-like permanent magnet 19 is provided inside the housing. Is stored in a vertically movable manner. As is clear from FIG.
A pair of a bell crank 20 and a rod-shaped drive link 25 is symmetrically arranged on both left and right sides of the permanent magnet 19, and each bell crank 20
Is fixed orthogonally to the outer end of the crankshaft 21, and the magnet side arm 23 is fixed orthogonally to the inner end of the crankshaft 21. The magnet side arm 23 is disposed at a downward obtuse angle with respect to the link side arm 24 when viewed from the side. In each bell crank 20, the magnet side arm 23 is inserted inside the case side wall, and the link side arm 24 and the link are inserted by inserting the crank shaft 21 into the through hole 12 formed in the case side wall and rotatably supporting the same. Reference numeral 25 is located outside the side wall of the housing.

In order to cover the link side arm 24 and the drive link 25 disposed outside the housing side wall, a protection wall 16 a is formed outside the housing side wall, thereby forming the housing 1.
6 has a double structure on the front and both sides. Protective wall 1
Due to the presence of 6a, it is possible to prevent the bell crank 20 and the drive link 25 from colliding with the object to be crushed and being damaged during the crushing operation.

The bell crank 20 includes a magnet-side arm 23
Shaft 19 projecting its tip from the center of the side wall of permanent magnet 19
a, and the distal end of the link-side arm 24 is connected to the rear end of the drive link 25 by a pin 24a. The rod-shaped drive link 25 is substantially vertical, and its upper portion is located above the protective wall 16a and further above the inner wall surface of the fixed arm 3. The upper portions of the drive links 25, 25 are slightly inclined inward when viewed from the side as shown in FIG. 3, and the upper end portions 26 are horizontally bent inward. Near the end of the closing stroke of the rotating arm 4, the link upper end 26 comes into contact with a horizontal projection 27 of an attached member fixed to both sides of the tip of the arm, and pushes down the link 25 with the horizontal projection.

The housing 16 has a pair of connecting portions 17, 17 having both side walls extending upward to form a pair of connecting portions 17, 1.
7 is approximately equal to the lower lateral width of the fixed arm 3.
Each connecting portion 17 has two pin holes 2 at predetermined intervals.
8, 28 are provided. On the other hand, two pin holes 11, 11 (FIG. 3) are formed below the fixed arm 3 so as to penetrate.
The interval between 1 and 11 is the same as that of the pin holes 28 and 28 of the connecting portion 17. When the magnet device 15 is mounted, the positions of the pin holes 11, 11 and 28, 28 are aligned, and the two pins 2
9 and 29 are inserted and detachably connected. Two pins 2
When the magnet device 15 is inserted into the crusher 1 and attached to the crusher 1, the attachment and detachment of the magnet device 15 can be easily performed in a short time, which is preferable.

In the arm opening state as shown in FIG. 1, the drive link 25 is free and located above the magnet device 15, and the permanent magnet 19 descends by its own weight and approaches the attraction surface 18, and is short. It can absorb iron scraps and small iron pieces. On the other hand, near the end of the closing stroke of the turning arm 4 as shown in FIG. 2, the horizontal projections 27, 27 of the turning arm come into contact with the link upper ends 26, 26, and the closing operation of the arms 3, 4 causes the drive link to move. 25, the bell crank 20 is rotated via the link, thereby separating the permanent magnet 19 from the attraction surface 18 and releasing the object to be attracted such as iron chips.

FIGS. 4 to 6 show a modification of the present invention.
The illustrated gripper for disassembly 30 includes a main body frame 31 having a substantially rectangular flat surface, and curved rotating arms 33 and 34 which are opposed to each other and which are pivotally mounted by pins 38 and 38 located on the adjacent even part in front of the main body frame. Having. The rotating arms 33 and 34 are indirectly connected via a synchronization opening / closing link (not shown), and both ends of the hydraulic cylinder 35 housed in the frame are connected to the rear end of one of the rotating arms 34 by pins 36 and 37. And the lower frame of the main body frame 31 in a rotatable manner. The bracket part 32 is rotatably attached to the upper rear part of the main body frame 31 via a swivel bearing 42.

A hydraulic motor for rotation (not shown) is installed in the gripper 30 in the bracket portion 32, and a pinion attached to a shaft end of the motor meshes with a rack engraved on an inner ring of the rotation bearing 42. The rotation of the hydraulic motor allows the main body frame 31 to be pivotable with respect to the bracket portion 32. The hydraulic motor is connected to hydraulic connections 40a, 40a on both sides of the bracket by hydraulic hoses, while the hydraulic cylinder 35 is connected to hydraulic connections 40, 40 by hydraulic hoses passing through a swivel joint (not shown). .

The piping system to the hydraulic cylinder 35 and the like includes:
This is the same as in the case of the crusher 1 described above. The driving oil is supplied from a driving pump mounted on the excavator 65, passes through a hydraulic piping system installed along the arm 66 of the excavator,
It is sent to the hydraulic connection 40 or 40a, and the opening and closing of the rotating arms 33 and 34 can be controlled by operating a valve that is interlocked with a pedal or lever installed in the cab.

As is clear from FIG. 6, the rotating arm 3
Each of the front portions of the forks 3 and 34 has a fork shape. For example, the rotating arm 33 has two claws, and the rotating arm 34 has three claws. When both the rotating arms 33 and 34 are closed, the front portions of the one rotating arm and the other rotating arm are arranged so as to cross each other. The rotating arms 33 and 34 have one claw and 2
A real nail or a combination of three and four nails may be used.

The magnet device 45 detachably mounted on the lower rotating arm 33 includes a rectangular flat hollow housing 46 having a flat suction surface 48 on the bottom surface, and a plate-like permanent housing is provided inside the housing. The magnet 49 is housed in a vertically movable manner. As is apparent from FIG. 6, the bell cranks 50 are arranged symmetrically on the left and right sides of the permanent magnet 49, the open arms 54 of each bell crank 50 are fixed orthogonally to the outer end of the crank shaft 51, and the magnet arms 53 Is orthogonally fixed to the inner end of the crankshaft 51. The magnet-side arm 53 is disposed at a downward obtuse angle with respect to the open-side arm 54 when viewed from the side, and the open-side arm extends slightly downward toward the front. In each bell crank 50, the crank shaft 51 is inserted into a through hole 52 formed in the side wall of the housing and rotatably supported, so that the magnet side arm 53 is located inside the housing side wall and the open side arm 54 is located in the housing side. Located outside the body wall.

In order to cover the arm 54 of the bell crank 50 disposed outside the case side wall, a protection wall is formed outside the case side wall, whereby the case 46 has a double structure on both sides. . Due to the presence of the protective wall, it is possible to prevent the bell crank 50 from colliding with the object to be crushed and being damaged during the crushing operation.

In the magnet device 45, both side walls of the housing 46 are extended upward to form a pair of connecting portions 47, 47, while a pin is provided at an intermediate portion of the lower rotating arm 33 at a predetermined interval. Holes 41, 41 (FIG. 6) are formed, and each pin hole penetrates two claws of the arm 33 in a straight line. Pin hole 4
The interval between the pins 1 and 41 is the same as the interval between the pin holes 58 and 58 of the connecting portion 47 in the magnet device 45. When mounting the magnet device 45, align the positions of both pin holes 41 and 58,
A total of four pins 59 are inserted into each of the claws of the arm 33 and detachably connected.

In this state, in the magnet device 45,
Near the end of the closing stroke of the rotating arm 33, the rotating arm 3
The inner surfaces 43, 43 of the two outer claw tip portions of 4 contact the other end portions 54 of the bell cranks 50 and push down. That is, the bell crank 50 rotates in conjunction with the opening and closing operations of the rotating arms 33 and 34, and the rotation separates the permanent magnet 49 from the attraction surface 48.

Next, a method of using the magnet device 45 will be described. This method is substantially the same for the magnet device 15 described above. Conventionally, in the dismantling work and the concrete crushing work using the apparatus disclosed in Japanese Patent Application Laid-Open No. 8-284434, long reinforced scrap is collected and collected at any time by opening and closing the crushing arm, and it is difficult to collect with both crushing arms. Short iron scraps and small iron pieces were adsorbed and collected by the magnet. The collection operation using the magnet body is only a very limited time zone, and most of the operation time is dismantling / crushing operation. For this reason, although a magnet body is necessary, if it is incorporated in the crusher, the overall weight is heavy and the width is wide, and the operability of the hydraulic shovel and the crusher during dismantling and crushing operations is deteriorated.

In the present invention, the magnet device 45 is detachably mounted on the dismantling work machine. Therefore, as shown in FIG.
When the magnet device 45 is installed on one of the rotating arms 33 of the disassembly gripper 30 attached to the hydraulic excavator 65, the magnet device only needs to be oriented toward the ground, and small iron pieces such as reinforced scraps, scissors, hinges, etc. Can easily perform adsorption and collection of
Collection work can be easily achieved without manual work. On the other hand, when working mainly in dismantling, when the magnet device 45 is removed, the gripper 30 becomes significantly lighter, and there is no sticking of iron scraps that hinder the disassembling operation. The work of converging reinforced scraps can be performed very efficiently.

In the magnet device 45, the rotating arms 33, 3
In conjunction with the opening / closing operation of 4, the permanent magnet 49 housed in the housing 46 approaches and separates toward the attraction surface. As shown in FIG. 7, during the adsorption and collection of iron scrap,
When the rotating arms 33 and 34 are opened, the magnet 49 descends by its own weight and comes into contact with the attracting surface 48 to attract the iron dust by the lines of magnetic force penetrating the attracting surface.
Collect this. Further, when the rotating arms 33 and 34 are closed, the magnet 49 is pushed upward by the rotation of the bell crank 50 to be far away from the attracting surface 48, and there is almost no line of magnetic force passing through the attracting surface, so that iron dust is removed. It falls away from the suction surface 48.

FIG. 8 or FIG. 9 shows a mechanism for operating the permanent magnet to approach / separate in parallel with the attracting surface. In the configuration of FIG. 8, the fulcrum 71 of the bell crank 70, that is, the crankshaft 72 is rotatably supported by a casing side wall (not shown), and one of the crank levers 73 is provided on a central projecting portion 79 of the permanent magnet 75. Connect at 79a. On the magnet side of the bell crank 70, an auxiliary link 76 of the same length as the crank lever 73 is arranged in parallel with the lever 73, and both ends 77 and 78 of the auxiliary link 76 are connected to the permanent magnet 75 by a pin 79b or a support pin 80. The shaft is attached to the side wall of the housing.

In this case, when the turning arm of the dismantling work machine is closed, the turning arm pushes down the crank lever 74 of the bell crank 70, and the bell crank is centered on the crank shaft 72 as shown by the arrow on the right side of FIG. To rotate.
Since the permanent magnet 75 is connected to the side wall of a housing (not shown) by forming a parallelogram with the crank lever 73 and the auxiliary link 76, the permanent magnet 75 does not rotate back and forth,
It moves up and down along the left arrow while the bottom surface is parallel to the housing suction surface. 8 indicates a state where the rotating arm is closed and the magnet 75 is pulled up from the attraction surface, and a solid line in FIG. 8 indicates a state where the magnet 75 is in contact with the attraction surface.

On the other hand, in the configuration shown in FIG. 9, auxiliary links 90 and 93 having the same length are arranged in parallel close to the permanent magnet 84, and both ends of each link are connected to the permanent magnet 84 and the casing side wall (not shown). And are attached to each other. In FIG. 9, a pair of bell cranks 85 are arranged on the left and right side surfaces of a permanent magnet 84, and a crank shaft 86 at a fulcrum thereof is axially attached to a side wall of a housing (not shown). A parallel notch 89 is formed in the portion. Notch 89
Is slidably engaged with a pin 87 protruding from the side surface of the permanent magnet 84. Auxiliary links 90, 93 located on opposite sides
Are arranged in parallel to the left and right side surfaces of the magnet 84, one end of which is provided by pins 91 and 94 provided at the center projecting portion of the magnet 84, and the other end is provided by pins 92 and 95 provided on the side wall of the housing. Link.

In this case, when the turning arm of the dismantling work machine is closed, the turning arm pushes down the crank lever 88 of the bell crank 85, and the bell crank 85 rotates about the fulcrum 86, and the magnet 84 is moved upward. Move to Since the permanent magnets 84 are formed in a parallelogram by the auxiliary links 90 and 93 and are supported by the side walls of the housing, the permanent magnets 84 do not rotate back and forth and move up and down while the bottom surface is parallel to the housing suction surface. I do. 9 indicates a state in which the rotating arm is closed and the magnet 84 is pulled up from the attraction surface, and a solid line in FIG. 9 indicates a state in which the magnet 84 is in contact with the attraction surface.

[0041]

The magnet device according to the present invention is detachable,
When the crushing work is mainly performed by the dismantling work machine, it can be removed from the dismantling work machine. As a result, the crushing work can be performed efficiently by reducing the weight of the dismantling work machine, and the hydraulic shovel can be operated stably and safely. It is economical because energy consumption at the time is small. On the other hand, the conventional crusher with a built-in magnet body requires a heavy magnet body of about 100 kg to efficiently perform the adsorption and recovery of iron chips regardless of its size, and the stability of the hydraulic shovel is reduced. It may not be possible to use it if there is a weight limit due to the need to secure it. Further, in a crusher for a small hydraulic excavator, it is difficult to remove the built-in magnet body even when it is not necessary, so that the weight and size of the crusher significantly reduce the workability during the crushing operation, which is not practical.

In the magnet device of the present invention, the connection mechanism to the dismantling work machine is of a pin type, and can be easily attached, so that the attachment / detachment work can be performed in a short time and easily at the work site. Also, if the magnet is moved up and down by a parallel auxiliary link, the magnet is always kept horizontal and moves up and down. The performance is improved.

In the present invention, a permanent magnet is employed, and adsorption and desorption of iron scraps and the like can be operated by opening and closing a rotating arm of the dismantling work machine. This eliminates the need for a hydraulic cylinder for raising and lowering the magnet, and eliminates the need to install additional equipment such as power supply equipment and control devices for the electromagnet on the hydraulic excavator. When the link and the bell crank are properly positioned by forming the pin holes for use, the magnet device can be mounted and used.

[Brief description of the drawings]

FIG. 1 shows a crusher equipped with a magnet device of the present invention,
FIG. 4 is a side view showing a state in which a permanent magnet is in contact with an attracting surface in the magnet device, with a part thereof being cut away.

FIG. 2 is a side view similar to FIG. 1 showing a state in which a rotating arm of the crusher of FIG. 1 is closed.

FIG. 3 is an enlarged sectional view taken along the line AA of FIG. 1;

FIG. 4 is a side view showing a disassembly gripper to which the magnet device of the present invention is mounted, and showing a state in which a permanent magnet is in contact with an attracting surface in the magnet device, with a portion cut away.

FIG. 5 is a side view similar to FIG. 4, showing a state in which a rotating arm of the gripper for dismantling in FIG. 4 is closed.

FIG. 6 is an enlarged sectional view taken along the line BB of FIG. 4;

FIG. 7 is an overall side view showing a posture in which the dismantling gripper of FIG. 4 is attached to a hydraulic shovel and a work of sucking iron chips is performed.

FIG. 8 is a main part side view showing a mechanism in which a permanent magnet in a magnet device moves up and down horizontally.

FIG. 9 is a side view of a main part of another mechanism in which a permanent magnet moves up and down horizontally.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crusher 2 Main body frame 3 Fixed arm 4 Rotating arm 15 Magnet device 16 Housing 17 Connecting part 18 Suction surface 19 Permanent magnet 20 Bell crank 25 Drive link 27 Horizontal projection 29 Mounting pin

Claims (7)

[Claims] 1. A magnet device detachably mounted on a disassembly work machine, comprising: a housing having an adsorbing surface at a bottom portion through which lines of magnetic force are transmitted; a permanent magnet housed in the housing so as to be movable up and down; And a drive link connected to the other end of the crank, the disassembly work being carried out in a state where the housing is attached to the dismantling work machine. The link is moved up and down by the rotating arm of the machine or its attached member, so that the bell crank is rotated via the drive link in conjunction with the opening and closing operation of the rotating arm, and the permanent magnet approaches and separates from the adsorption surface. Magnet device for work machines. 2. A magnet device detachably mounted on a disassembly work machine, comprising: a housing having an adsorption surface at a bottom portion through which magnetic lines of force pass, a permanent magnet housed in the housing so as to be movable up and down, and the permanent magnet. And a bell crank which is rotatably supported by the side wall of the housing, and which is connected to one end of the housing. A magnet device for a dismantling work machine in which the bell crank is rotated in conjunction with the opening and closing operation of the rotating arm by pushing down the other end, so that the permanent magnet approaches and separates from the attraction surface. 3. An auxiliary link having substantially the same length as the magnet-side lever portion of the bell crank is arranged substantially parallel to the lever portion.
When the both ends of the auxiliary link are axially attached to the permanent magnet and the housing side wall, respectively, the bottom of the permanent magnet moves up and down substantially parallel to the housing suction surface when the crank rotates due to the parallel auxiliary link. Item 3. The magnet device according to Item 1 or 2. 4. A plurality of auxiliary links having substantially the same length are arranged in parallel with each other in close proximity to the permanent magnet, and both ends of each auxiliary link are axially mounted on the permanent magnet and the side wall of the housing, respectively. 3. The magnet device according to claim 1, wherein the auxiliary link intervenes to move the bottom surface of the permanent magnet up and down substantially in parallel with the housing suction surface when the crank rotates. 5. A fixing or rotating arm for a dismantling work machine, wherein a plurality of pin holes are provided in a connecting portion above the housing, and a pin is inserted and fixed in each pin hole to fix the connecting portion above the housing. The magnet device according to any one of claims 1 to 4, wherein the magnet device is detachably mounted on the magnet device. 6. A crusher mounted on a work cart such as a hydraulic shovel and having at least one of an opposing arm pivoting, a casing having a suction surface at a bottom portion through which lines of magnetic force pass, and one of the arms inside the crusher. A magnet device comprising a permanent magnet housed in a vertically movable manner, a bell crank having one end connected to the permanent magnet and rotatably supported by a housing side wall, and a drive link connected to the other end of the crank. The other arm is in direct or indirect contact with the upper end of the link of the magnet device near the end of the arm closing stroke, and the pressing portion is connected via the link and the crank in conjunction with the opening and closing of both arms. Crusher that moves the permanent magnet up and down. 7. A dismantling gripper attached to a work cart such as a hydraulic excavator and having a pair of rotating arms,
One of the rotating arms has a housing having a suction surface at the bottom through which the magnetic force lines pass, a permanent magnet housed in the housing so as to be movable up and down, and one end connected to the permanent magnet and rotated by the housing side wall. A magnet device comprising a freely supporting bell crank is detachably mounted, and the other rotating arm is in direct or indirect contact with the other end of the bell crank near the end of the arm closing stroke. A dismantling gripper that moves a permanent magnet up and down via a bell crank in conjunction with opening and closing of a moving arm.