JP2563850B2 - Crusher with magnet - Google Patents

Description

The present invention relates to a crusher that is an attachment for construction machinery and the like, and particularly has a function of collecting rebar scraps and iron-based waste materials such as bolts generated when crushing reinforced concrete or the like. And a crusher with a magnet.

[Conventional technology]

As one of the devices for crushing structures such as reinforced concrete structures, various crushers have been proposed and used, which are attached to a construction machine and crush a target to be crushed by engaging a fixed jaw and a movable jaw operated by hydraulic pressure. ing.

In this crusher, first, a fixed jaw and a movable jaw are engaged with each other to crush an object to be crushed. As a result, the concrete part is crushed into small pieces, and the reinforcing bars inside are exposed. Next, the exposed rebar is cut by a fixed jaw base and a cutter formed near the center of rotation of the movable jaw, and the concrete wall surface where the rebar has been cut is further crushed, and the target is crushed sequentially. Do it.

[Problems to be Solved by the Invention]

In the crushing work using the above apparatus, the crushed concrete pieces are dumped at a predetermined place or used for landfilling. On the other hand, iron-based materials such as reinforcing bars and bolts are collected and recycled as recycled resources.

For this reason, the reinforcing bars and the like that are cut during the crushing work and after the crushing work are collected separately from the concrete pieces. In this recovery work, relatively long rebars and the like can be recovered by using the crusher and pinching the rebar with this crusher. However, it is practically impossible to recover small things such as short length reinforcing bars and bolts by using a crusher, and it is the current situation that they are eventually recovered manually. However, manual recovery is labor-intensive and time-consuming, and it is dangerous because crushed concrete pieces collapse. Furthermore, recently, there is a tendency to hate performing such work, and it is very difficult to obtain human hands.

[Means for solving the problem]

The present invention is configured to eliminate the above-mentioned problems of the prior art, and effectively recovers iron-based materials regardless of size by providing a crusher with a function of recovering iron-based materials. It is a crusher that can be done.

That is, a magnet device is attached to the crusher, and this magnet device is configured to adsorb and desorb magnetically permeable materials such as iron.

[Action]

During the crushing work and after the crushing work, when the rebar and the like are recovered, the magnet device is operated and the magnetic force of the magnet device is used to adsorb and recover the iron-based waste materials scattered around the rebar and the like. Next, the crusher is moved to a predetermined position while adsorbing the iron-based waste material, and the adsorbing force of the magnet device is lost at this position to desorb the adsorbed material.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

 FIG. 1 shows a first embodiment of the present invention.

In the figure, an arrow 1 indicates a crusher attached to an arm 2 of a construction machine. The crusher 1 has a main body portion 3 directly connected to the arm 2, a fixed jaw 4 formed to be connected to the main body portion 3, and a movable body rotatably attached to the main body portion 3 with a shaft 5. It comprises a jaw 6 and a hydraulic cylinder 7 for rotating the movable jaw 6.

Further, 8a is a blade for cutting the reinforcing bar attached to the base of the fixed jaw 4, 8b is a blade attached to the movable jaw 6 at a position corresponding to this blade 8a, and these two blades 8a and 8b are used for cutting the reinforcing bar. The cutter 8 of FIG. Reference numeral 9 is a concrete crushing tooth attached to the movable jaw 6, and is attached to a position facing the void portion 4a of the fixed jaw 4. As a result, when the movable jaw 6 is engaged with the fixed jaw 4, the teeth 9 are located in the cavity 4a so that the jaws 4 and 6 are completely engaged with each other and effective crushing of concrete or the like is performed. It is supposed to be.

Next, an arrow 10 indicates a magnet device, which is arranged and fixed in the space formed in the base of the crusher main body 3. Reference numeral 11 is an electromagnet forming the main body of the magnet device 10, 11a is an iron core forming the electromagnet, and 11b is a coil wound around the iron core 11a. Reference numeral 12 is a canning for directly protecting the electromagnet 11, and the bottom surface of the crusher main body 3 for mounting the casing 12 is an adsorption surface 13 for adsorbing an object by the magnetic force of the electromagnet 11.

Here, sprinkling water is often performed to prevent dust from scattering when crushing concrete, and since work is also performed in the rain, the casing 12 is airtightly attached so that water does not enter the electromagnet arrangement part. There is. Reference numeral 16 is a shield plate fixed to the rotating base of the movable jaw 6, and the arrangement portion of the casing 12 is separated from the crushing portion composed of the fixed jaw 4 and the movable jaw 6, and is thereby crushed by the crushing portion. It is for protecting the magnet device 10 from concrete pieces and the like.

Reference numeral 14 is a power cord for supplying electric power to the electromagnet 11, and the other end is connected to a power source. Although the power source of the construction machine to which the crusher 1 is attached can be used as the power source, a larger power can be supplied by using a generator separately from the construction machine, and a high adsorption force can be obtained by this power. You may do it. Further, if the power cord 14 is arranged along the hydraulic hose 15 for driving the crusher 1, there is no fear of disconnection.

Next, the operating state of this device will be described by taking the case of crushing a reinforced concrete structure as an example.

First, when the arm 2 of the construction machine is operated to arrange the crushing portion of the crusher 1 on the reinforced concrete wall to be crushed, the movable jaw 6 is operated to bite the concrete wall. As a result, the concrete part of the concrete wall is crushed and the internal reinforcing bars are exposed. If a certain length of rebar is exposed by repeating the crushing of the concrete wall several times, position the crusher 1 so that the exposed rebar is located at the base of the movable jaw 6 and the fixed jaw 4, and then The rebar is cut by the cutter 8 by engaging the movable jaw 6 with each other.

Next, the operator in the driver's seat of the construction machine turns on the power switch (not shown) to excite the electromagnet 11 and cause the cut rebar 17 and other ferrous metal to be adsorbed on the adsorbing surface 13 of the crusher 1. . The construction machine body and the arm 2 are operated while adsorbing these iron-based materials to move the crusher 1 to a predetermined position, and then the power is turned off to demagnetize the electromagnet 11 to adsorb it. After dropping the existing material, return to the next crushing work. During the crushing work, the power supply to the electromagnet 11 is naturally turned off. Further, the crushing work and the rebar cutting work may be performed several times, and then the rebar adsorption and recovery work may be collectively performed.

 FIG. 2 shows a second embodiment of the present invention.

Whereas the first embodiment uses an electromagnet,
In this embodiment, the use of a permanent magnet eliminates the need for a power supply.

Reference numeral 21 is a magnet device attached to the base of the main body 3 of the crusher 1. Reference numeral 22 is a casing of the magnet device 21, which is a kind of hydraulic cylinder for actuating a permanent magnet described later, and 22a is an attraction surface which is a bottom surface of the cylinder. Reference numeral 23 denotes a permanent magnet housed in the casing 21, the side peripheral edge portion of which is substantially in close contact with the inner peripheral wall of the casing 22 and is configured to be reciprocally movable within the casing.

That is, the permanent magnet 23 is a kind of piston that operates in the casing 22 that functions as a hydraulic cylinder.
To the casing 22, hydraulic pipes 24a and 25b for supplying hydraulic pressure for operating the permanent magnets are connected. Further, these hydraulic pipes are operated by using the same hydraulic power source as the hydraulic power source for driving the crusher 1. The casing 22 is preferably formed of a non-magnetic material so that the magnetic force of the permanent magnet 23 in the casing 22 acts only through the attraction surface 22a.

 Next, the operation state of this device will be described.

When adhering the cut rebar, etc., the permanent magnet 23 is pushed down by injecting hydraulic oil from the hydraulic pipe 24a side using the hydraulic valve in the operator's seat of the construction machine to push down the casing 22.
Is almost in close contact with the suction surface 22a forming the bottom surface of the. As a result, the magnetic force of the permanent magnet 23 acts on the rebar or the like to be attracted through the attraction surface 22a and attracts it. If the crusher 1 is moved to a predetermined position in this state, the permanent magnet 23 is separated from the attracting surface 22a by operating the valve again to supply the hydraulic oil from the hydraulic pipe 24b side, and then, as shown in FIG. Move to the top position. As a result, the magnetic force passing through the suction surface 22a is substantially lost, and the rebar or the like that has been adsorbed is separated and falls.

In this embodiment, since a permanent magnet is used in place of the electromagnet, no special power source is required, and the object can be adsorbed and released by diverting the hydraulic pressure for operating the crusher.

The embodiment of the present invention has been described above, and FIGS. 3 and 4 show the configuration related to the present invention.

In the figure, reference numeral 18 is an electromagnet unit, which is fixed to both sides of the fixed jaw 4 of the crusher 1 by fixing means such as bolts 25. 18a is a casing for storing an electromagnet,
An electromagnet 19 including an iron core and a coil wound around the iron core is housed in the electromagnet housing casing 18a. The electromagnet unit 18 is formed as a kind of attachment for the crusher by being formed separately from the crusher 1, and although it is somewhat difficult in terms of protection against crushed pieces, a temporary effect can be expected. .

When the electromagnet unit 18 is attached to the crusher 1 later, a bolt hole is formed in the fixed jaw 4 of the crusher 1,
The electromagnet unit is fixed using the bolt holes.
Although the electromagnet units 18 are attached to both sides of the fixed jaw 4 in the configuration shown in the figure, it is possible to exhibit a temporary effect even if the electromagnet units 18 are provided only on one side, although the attraction force is reduced. Since the electromagnet unit 18 is attached to a portion where a crushed concrete piece or the like directly collides during crushing work, the casing 18a needs to be particularly thick and sturdy in order to protect the electromagnet 19. Further, for the same reason, the power cord 14 for supplying electric power to the electromagnet 19 is also housed in a sturdy protective pipe 20 formed of metal or the like.

In this device, when the cut rebar or the like is adsorbed, the electromagnet 19 is excited by the same procedure as in the above-described embodiment. As a result, the fixed jaw 4 of the crusher 1 made of a magnetically permeable material is magnetized, and the fixed jaw portion serves as an adsorption surface to adsorb the rebar and the like. If the crusher 1 is moved to a predetermined place while the object is adsorbed, the power is turned off and the adsorbed waste material is dropped.

〔effect〕

As described above, according to the present invention, the magnet device is attached to the crusher, and the magnet device is configured to adsorb and desorb magnetically permeable materials such as iron. Since it is possible to mechanically recover metal materials such as rebar cut using a crusher, and because the magnet device is housed in the interior space of the crusher, the harsh conditions of crushing reinforced concrete structures etc. Even underneath, it is possible to carry out the recovery work with high efficiency and safety without damaging the magnet device.

Further, since the crushing of the object and the recovery of the iron-based metal can be performed alternately using the same device, it is economical and the efficiency of the work can be promoted.

[Brief description of drawings]

FIG. 1 is a partially broken side view of a crusher showing a first embodiment of the present invention, and FIG. 2 is a partially broken side view of a crusher showing a second embodiment, FIGS. Shows a simple apparatus to which the technique according to the present invention is applied, FIG. 3 is a side view of the crusher, and FIG. 4 is a sectional view taken along the line AA of FIG. 1 ... Crusher, 2 ... Arm of construction machine 3 ... Crusher main body, 4 ... Fixed jaw 6 ... Movable jaw, 7 ... Hydraulic cylinder 8 ... Cutter, 9 ... Crushing tooth 10 ... … Magnet device 11 …… Electromagnet, 12 …… Casing 13 …… Suction surface, 14 …… Power cord 15 …… Hydraulic hose, 17 …… Reinforcing bar 21 …… Magnet device 22 …… Casing (hydraulic cylinder) 22a …… Suction Surface 23 ... Permanent magnet (piston member) 24a, 24b ... Hydraulic pipe

Claims (3)

(57) [Claims] 1. A main body part connected to an attachment target side of a construction machine and the like, a fixed jaw connected to the main body part, and an opening / closing operation with respect to the fixed jaw by being rotatably attached to the main body part. In a crusher composed of a movable jaw configured to perform, a magnet device is configured by a magnet that is a magnetic force source and a casing that houses the magnet, and the magnet device is housed and fixed in the base space of the main body. The bottom surface of the main body is protected by the main body and through which the magnetic force of the magnet is transmitted is used as an attraction surface, and the magnet device is configured to be able to adjust the magnetic force transmitted through the attraction surface. A crusher with a magnet, characterized in that the magnetic force of the device is adjusted to adsorb and desorb an object to be adsorbed such as a reinforcing bar on the adsorbing surface. 2. The magnet device comprises a casing as a hydraulic cylinder and a permanent magnet as a piston member arranged in the casing and capable of reciprocating in the casing. The magnet device is a crusher. An arrangement surface, which is arranged and fixed to the base of the main body and on which the magnet device is arranged and fixed, is used as an attraction surface, and the permanent magnet in the casing is brought close to or away from the attraction surface by hydraulic pressure to attract and separate objects. The crusher with a magnet according to claim 1, wherein 3. A hydraulic source for operating a crusher is used as a hydraulic source for operating the permanent magnet.
A crusher with a magnet.