JPH04155068A - Crusher having magnet - Google Patents

Abstract

PURPOSE:To make the work effective by using a magnet device installed to a crusher main body part of which magnetic force is adjustable, sucking a subject matter to be sucked such as a reinforcement bar, and removing it. CONSTITUTION:Concrete is crushed, and exposed reinforcement bars are cut by a movable jaw 6 and a fixed jaw 4. A power supply to a magnet device 10 is then put on to energize an electromagnet 11, so the cut reinforcement bars 17 are sucked to a suction surface 13 of the crusher 1. An arm 2 is then operated to move the crusher 1 to a predetermined position, and the power is put off to demagnetize the electromagnet 11, so the reinforcement bars 17 sucked to the suction surface 13 are dropped. The work efficiency can thus be improved.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a crusher that is an attachment for construction machinery, etc., and particularly relates to a crusher with a magnet that has the function of collecting iron-based waste materials such as reinforcing bar scraps and bolts generated when crushing reinforced concrete, etc. . [Prior Art] As one of the devices for crushing structures such as reinforced concrete buildings, there is a crusher that is attached to a construction machine and crushes the target by meshing a fixed jaw with a movable jaw operated by hydraulic pressure. Various methods have been proposed and used. In this crusher, first, a fixed jaw and a movable jaw are engaged to crush the object to be crushed. As a result, the concrete part is crushed into small pieces, and the reinforcing bars inside are exposed.The exposed reinforcing bars are cut by the fixed jaw base and the cutter formed near the center of rotation of the movable jaw, and the reinforcing bars are cut. By repeating the process of further crushing the concrete wall surface, the target is successively crushed. [Problems to be Solved by the Invention] In the crushing work using the above-mentioned device, the crushed concrete pieces are dumped at a predetermined location or used for landfill, etc. On the other hand, iron-based materials such as reinforcing bars and bolts are collected and reused as recycled resources. For this reason, cut reinforcing bars and the like are collected separately from concrete pieces between crushing operations and after the crushing operation is completed. In this recovery work, relatively long reinforcing bars and the like can be collected by using the above-mentioned crusher and pinching the reinforcing bars with this crusher. However, it is virtually impossible to collect small items such as short reinforcing bars and bolts using a crusher.
In the end, the current situation is that it is collected manually. However, manual collection is labor intensive and time consuming, and is dangerous as the crushed concrete pieces may crumble. Moreover, recently there has been a tendency to dislike doing such work, and it has become extremely difficult to obtain labor itself.

[Means to solve problems]

The present invention has been constructed to eliminate the problems of the prior art shown above, and by providing a crusher with the function of recovering ferrous materials, it is possible to effectively recover ferrous materials regardless of size. This is a crusher that can be used to That is, a magnet device is attached to the crusher, and the magnet device is configured to be able to attract and desorb magnetically permeable materials such as iron. [Operation] When recovering reinforcing bars, etc. during or after crushing work, the magnet device is activated and uses the magnetic force of this magnet device to adsorb and collect scattered ferrous waste materials such as reinforcing bars. Move the crusher to the specified position while adsorbing the system waste,
At this position, the adsorption force of the magnet device is eliminated, and the adsorbed material is released. [Examples] Examples of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a first embodiment of the invention. An arrow 1 in the figure indicates a crusher attached to an arm 2 of a construction machine. This crusher 1 includes a main body 3 directly connected to the arm 2, a fixed jaw 4 formed in connection with the main body 3, and a movable jaw 4 rotatably attached to the main body 3 about a shaft 5. It consists of a jaw 6 and a hydraulic cylinder 7 for rotating the movable jaw 6. Also, 8a is a fixed jaw 40
A blade for cutting reinforcing bars attached to the base, 8b is this blade 8
Position f corresponding to a is a blade attached to the movable jaw 6, and these two blades 8a and 8b constitute a cutter 8 for cutting reinforcing bars. Numeral 9 is a concrete crushing tooth attached to the movable jaw 6, which is attached to the cavity 4 of the fixed jaw 4.
It is designed to be installed at a position opposite to a. As a result, when the movable jaw 6 is engaged with the fixed jaw 4, the teeth 9 are positioned within the cavity 4a, so that both jaws 4 and 6 are completely engaged, and effective crushing is performed. It has become. Next, an arrow IO indicates a magnet device, which is arranged and fixed in a space formed at the base of the crusher main body 3. 11
is an electromagnet forming the main body of this magnet device 10, and ll
An iron core 11b forming an electromagnet is a coil wound around this iron core 11a. 12 is a casing for protecting this T-magnet 11, and the bottom surface of the crusher main body 3 to which the casing 12 is attached is! It serves as an attraction surface 13 for attracting an object by the magnetic force of the magnet 11. Here, when crushing concrete, water is often sprinkled to prevent dust from scattering, and the work is also done in the rain, so the casing 12 is attached airtight to prevent water from entering the electromagnet placement area. There is. Reference numeral 16 denotes a shielding plate fixed to the rotating base of the movable jaw 60, which isolates the placement part of the casing 12 from the crushing part consisting of the fixed jaw 4 and the movable jaw 6, thereby allowing the casing to be crushed in the crushing part. This is to protect the magnet device 10 from concrete pieces and the like. 14 is a power cord for supplying power to the electromagnet 11, and the other end is connected to a power source. As for the power source, it is possible to install the crusher 1 using the power source of the target construction machine, but it is possible to use a generator separate from the construction machine to supply a larger amount of power, and this power can be used to increase the adsorption capacity. In addition, if the power cord 14 is placed along the hydraulic hose 15 for driving the crusher 1, there is no need to worry about breakage. Next, the operating state of this device will be explained using an example of crushing a reinforced concrete structure. First, the arm 2 of the construction machine is activated to place the crushing part of the crusher 1 against the reinforced concrete wall to be crushed, and then the movable jaw 6 is activated to bite the concrete wall, thereby destroying the concrete part of the concrete wall. is crushed,
Internal reinforcing bars are exposed. If a certain length of reinforcing steel is exposed by repeatedly crushing a concrete wall,
The crusher 1 is positioned so that the exposed reinforcing bars are located at the bases of the movable jaws 6 and the fixed jaws 4, and then the movable jaws 6 are engaged to cut the reinforcing bars with the cutter 8. The operator in the driver's seat switches the power switch (not shown).
As on! The magnet 11 is excited to attract the cut reinforcing bars 17 and other ferrous metals to the attraction surface 13 of the crusher I. With these materials adsorbed, the construction machine main body and arm 2 are operated to move the crusher 1 to a predetermined position, and then the above! By turning # off! After demagnetizing the magnet 11 and dropping the attracted material, the process returns to the next crushing operation. In addition, during the crushing work, it is a matter of course that the electromagnet 1
The ti source for 1 is kept off. Further, the adsorption and collection work of the reinforcing bars may be performed all at once after the crushing work and the reinforcing bar cutting work have been performed several times. 2 and 3 show a second embodiment. In this embodiment, the structure is such that the magnet can be attached by simply making a small modification to the device currently in use. Reference numeral 18 denotes a magnet unit, which is fixed to both sides of the fixed jaw 40 of the crusher 1 by fixing means such as bolts 25, respectively. 18a is! A casing for storing magnets,
In this tM1 stone storage casing 18a, an am stone 9 consisting of an iron core and a coil wound around the iron core is stored. This electromagnet unit 18 is formed separately from the crusher 1 and is configured as a type of attachment for the crusher, so that it can be attached as appropriate to crushers that have not been equipped with an electromagnet. It has become. In addition, when the electromagnet unit 18 is later attached to the crusher 1, a bolt hole is drilled in the fixed jaw 4 of the crusher 1, and the 1it magnet unit is fixed using this bolt hole. In the illustrated configuration, the IITM1 stone unit 18 is attached to both sides of the fixed jaw 4, but even if it is installed only on the - side, the suction force will decrease, but the desired effect will not be achieved. It is possible. Since this electromagnet unit 18 is attached to a part directly hit by crushed concrete pieces etc. during crushing work, the gauging 18a is constructed to be particularly thick and sturdy in order to protect the tM1 stone 19. Further, for the same purpose, a power cord 14 for supplying electric power to the electromagnet 19 is also housed in a sturdy protective pipe 20 made of metal or the like. When this device picks up cut reinforcing bars, etc., the electromagnet 19 is energized in the same manner as in the previous embodiment. As a result, the fixed jaw 4 of the crusher 1 made of a magnetically permeable material is magnetized, and this fixed jaw portion becomes an attraction surface to attract the reinforcing bars and the like. After the crusher 1 is moved to a predetermined location with the target object adsorbed, the power is turned off and the adsorbed waste material is separated and dropped. FIG. 4 shows a third embodiment. While the above two embodiments use electromagnets, this embodiment uses permanent magnets, thereby eliminating the need for a power source. Reference numeral 21 denotes a magnet device attached to the base of the main body 3 of the crusher 1. 22 is a casing of this magnet device 21, which is a kind of hydraulic cylinder for operating a permanent magnet to be described later, and 22a is an attraction surface which is the bottom surface of this cylinder. Reference numeral 23 denotes a permanent magnet housed in the casing 21, and its side peripheral edge is connected to the casing 22.
The casing is configured to be in close contact with the inner circumferential wall of the casing, and to be able to reciprocate within the casing. In other words, this permanent magnet 23
is a type of piston that operates within the casing 22, which functions as a hydraulic cylinder. Hydraulic pipes 24a and 24b that supply hydraulic pressure for operating the permanent magnets are connected to the casing 22. Further, these hydraulic pipes are operated using the same hydraulic power source as that for driving the crusher 1. Note that the casing 22 is desirably made of a non-magnetic material so that the magnetic force of the permanent magnet 23 inside acts only through the attraction surface 22a. The operating state of this device will now be explained. When adsorbing cut reinforcing bars, etc., the permanent magnet 23 is pushed down by injecting hydraulic oil from the hydraulic pipe 24a side using a hydraulic valve in the driver's seat of the construction machine, and the adsorption surface 22a forming the bottom surface of the casing 22 is pressed down. Position it almost closely. As a result, the magnetic force of the permanent magnet 23 acts on the reinforcing steel or the like to be attracted through the attraction surface 22a, thereby attracting the same. If the crusher 1 is moved to a predetermined position in this state,
By operating the valve again to supply hydraulic oil from the hydraulic pipe 24b side, the permanent magnet 23 is separated from the attraction surface 22a and moved to the uppermost position 1 shown in the figure. As a result, the magnetic force passing through the attracting surface 22a is substantially eliminated, and the attracted reinforcing bars and the like separate and fall. In this embodiment, a permanent magnet is used instead of an electromagnet, so a special power source is not required, and objects can be attracted and detached by reusing a portion of the hydraulic pressure for operating the crusher. [Effect] As explained above, in the present invention, a magnet device is attached to a crusher, and this magnet device is configured to be able to adsorb and desorb magnetically permeable materials such as iron, so that crushing work can be carried out. In the meantime, it becomes possible to mechanically recover metal materials such as reinforcing bars that have been cut using this crusher, making it possible to achieve high efficiency and safety in recovery work. Further, since the crushing of the object and the recovery of the ferrous metal can be performed alternately using the same device, it is possible to achieve economical efficiency and to promote efficiency of work.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a crusher showing a first embodiment of the present invention, FIGS. 2 and 3 show a second embodiment, and FIG. 2 is a side view of the crusher, Figure 3 is A-A&! of Figure 2. FIG. 4 is a partially cutaway side view of a crusher showing a fourth embodiment. 1...Crushing machine 2...Arm of construction machine 3...
Crusher main body 4...Fixed jaw 6...Movable jaw 7
... Hydraulic cylinder 8 ... Cutter 9 ... Crushing teeth 10 ... Magnet device 11 ... Electromagnet 12 ... Casing 13 ...
- Adsorption surface 14...Power cord 15...Hydraulic hose 17...Reinforcing bar 18...Electromagnet unit 18a...Casing 19...Electromagnet 21...Magnet device 22...
Casing (hydraulic cylinder) 22a...Adsorption surface 23...Permanent magnet (piston member) 24a, 24b...Hydraulic pipe Fig. 1 Fig. 2 Fig. 3

Claims (5)

[Claims] (1) In a crusher comprising a fixed jaw connected to a main body and a movable jaw rotatably attached to the main body and engaged with the fixed jaw, a magnet serving as a source of magnetic force; A casing that houses this magnet constitutes a magnet device, and by attaching this magnet device to either the main body portion or the side portion of the fixed jaw, the surface through which the magnetic force of the magnet passes is used as an attraction surface, and the magnet device A crusher with a magnet, characterized in that the device is configured to be able to adjust the magnetic force that passes through the attraction surface, and by adjusting the magnetic force of the magnet device, objects to be attracted, such as reinforcing bars, are attracted and detached. (2) The magnet according to claim 1, wherein the magnet of the magnet device is an electromagnet, the magnet device is arranged and fixed at the base of the crusher body, and the bottom surface of the crusher body is an attraction surface. With crusher. (3) A magnet device consisting of an electromagnet and a casing that houses the electromagnet is arranged and fixed on at least one side of both sides of the fixed jaw, and the part of the fixed jaw where the magnet device is arranged serves as an adsorption part. A crusher with a magnet according to claim 1, characterized in that: (4) The magnet device is composed of a casing as a hydraulic cylinder and a permanent magnet as a piston member disposed within the casing and configured to be able to reciprocate within the casing. The arrangement surface on which the magnet device is placed and fixed on the casing is used as an attraction surface, and the permanent magnet in the casing is moved close to or away from this attraction surface using hydraulic pressure, thereby attracting and detaching the object. A crusher with a magnet according to claim 1, characterized in that: (5) The magnet-equipped crusher according to claim 4, wherein a hydraulic power source for operating the crusher is used as the hydraulic power source for operating the permanent magnet.