JP2001293392A - Crushing abnormality detector for self-traveling crusher and self-traveling crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crushing abnormality detector for a self-traveling crusher and a self-traveling crusher using the same capable of assuring a sufficient crushing function of the crusher by preventing a failure of the crusher. SOLUTION: Vibration of the self-traveling crusher 1 having a jaw crusher 3 is detected by an accelerometer 152. The jaw crusher 3 is judged to be in an abnormal state caused by charging a hardly crushable or an uncrushable matter or not by a vibration analyzer 150.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing abnormality detecting device for a self-propelled crusher that crushes a crushed object, such as a jaw crusher, a roll crusher, an impact crusher, a shredder, etc. The present invention relates to a crushing abnormality detection device for a self-propelled crusher which can sufficiently secure the crushing function of the crushing device by preventing the crushing device beforehand, and a self-propelled crusher using the same.

[0002]

2. Description of the Related Art Crushers are used for various types of large and small rocks, construction wastes, industrial wastes, and natural stones generated at construction sites, such as concrete lumps carried out when dismantling buildings and asphalt lumps discharged during road repairs. And the like (hereinafter, appropriately referred to as a material to be crushed) are crushed to a predetermined size at the work site before transportation, thereby reusing waste materials, facilitating construction, and reducing costs.

[0003] In such a crusher, a self-propelled crusher in which the crusher can be driven by itself and which has mobility has been already proposed based on the background of difficulty in securing land for the crushing plant or decentralized land. Have been.

The self-propelled crusher includes, for example, a traveling body having an endless track, a crusher for crushing a crushed object received by a hopper to a predetermined size, and a crushable object received by the hopper. And a conveyor for carrying out the crushed material that has been crushed and reduced by the crushing device to the outside of the crusher main body, and a crushed material provided above the conveyor and being transported on the conveyor. And a magnetic separator for magnetically attracting and removing the magnetic material. The endless track, crushing device, feeder, conveyor, and magnetic separator are hydraulically driven actuators (a traveling hydraulic motor, a crushing hydraulic motor, a feeder hydraulic motor, a conveyor hydraulic motor, and a magnetic separator hydraulic motor). Driven. That is, the hydraulic pump is driven by the prime mover, and the hydraulic oil discharged from the hydraulic pump is supplied to the hydraulic motors to drive the mechanisms. At this time, the direction and flow rate of the pressure oil supplied to each hydraulic motor are controlled by corresponding control valve means (running control valve means, crushing control valve means, feeder control valve means, conveyor control valve means, and magnetic separator. Control valve means).

[0005] In the above construction, the crushed material introduced into the hopper above the self-propelled crusher by, for example, a hydraulic shovel is guided to the crusher by the feeder below the hopper, and the crusher has a predetermined size. Crushed.
The crushed material falls from the space below the crushing device onto the conveyor below the crushing device, and is conveyed by this conveyor. During this transportation, the magnetic separator placed above the conveyor adsorbs and removes, for example, rebar pieces mixed in the concrete lump, and is almost uniform in size, and is finally self-propelled as a crushed product. It is carried out from the front or rear of the crusher.

[0006] Here, during the above-mentioned operation, foreign materials that are difficult or impossible to be crushed by the crushing device (for example, iron scraps derived from steel materials such as H steel, rocks having particularly high uniaxial compressive strength, etc.) are introduced. Then, the crushing device may be clogged with the object to be crushed, which may cause damage to the crushing device.

Therefore, in order to solve this point, conventionally,
A breakage prevention device for a crushing device as described in JP-A-48-58450 has been proposed.

That is, when a jaw crusher that oscillates a moving tooth (swing jaw) with respect to a fixed tooth and performs crushing is used as a crushing device provided in a self-propelled crushing machine, the upper end portion of the moving tooth is usually used. Is mounted eccentrically on a rotating shaft (eccentric shaft), and the lower side of the moving teeth is connected to a toggle plate rotatably mounted on the fixed side. The rotation of the eccentric shaft causes the upper end of the moving tooth to eccentrically rotate, while the lower side reciprocates on an arc trajectory whose radius is the length of the toggle plate, whereby the moving tooth is swung with respect to the fixed tooth. Exercise. At this time, by appropriately setting the strength of the toggle plate, the toggle plate is preferentially broken when a non-crushable material is introduced into the jaw crusher, and the moving teeth are separated from the fixed teeth. This prevents the other parts of the jaw crusher from being damaged.

In the above prior art, in a jaw crusher provided with the above toggle plate, one end of the toggle plate is connected to a rod side of a hydraulic cylinder, and is connected to a hydraulic line communicating with a bottom side of the hydraulic cylinder. Connect pressure switch. When the pressure in the hydraulic cylinder becomes equal to or more than a predetermined value, the pressure switch is operated to switch the control valve, and the hydraulic oil on the bottom side of the hydraulic cylinder is returned to the tank, and the hydraulic cylinder is operated in the contracting direction to move the moving teeth. Is separated from the fixed teeth, and the foreign matter in the jaw crusher is dropped downward. As a result, the jaw crusher is prevented from being damaged, and the toggle plate is also prevented from being broken, thereby saving labor and time required for replacement.

On the other hand, as described in Japanese Patent No. 2777773, a rotation detecting means for detecting the rotation of the crushing hydraulic motor is provided, and when the detected rotation number becomes equal to or less than a predetermined rotation number, the control means controls the rotation. The control valve means for the feeder is switched to the neutral position, the supply of pressure oil from the hydraulic pump to the hydraulic motor for the feeder is stopped, the operation of the feeder is stopped, and the supply of the material to be crushed to the crushing device is stopped. A configuration has also been proposed.

[0011]

The above prior arts have the following problems, respectively. JP-A-48-58
The prior art described in Japanese Patent No. 450 gazette detects a foreign object introduced into a jaw crusher as a crushing device as an increase in the pressure in a hydraulic cylinder, and operates the hydraulic cylinder in a contracting direction by operating a pressure switch. , For dropping foreign matter in the jaw crusher downward.

Here, the toggle plate for transmitting a large crushing reaction force due to foreign matter input to the hydraulic cylinder is connected to the lower side of the moving teeth as described above. Therefore, it is effective when the foreign matter is relatively lower in the jaw crusher and the crushing reaction force acts on the lower side of the moving teeth, but the foreign matter is relatively higher in the jaw crusher and the crushing reaction force is lower. When acting on the upper side of the moving tooth, most of the component of the crush reaction force is applied to the eccentric shaft side without being released from the toggle plate side. for that reason,
There is a possibility that the buffering action of the toggle plate or the hydraulic cylinder does not function effectively, and other parts of the jaw crusher (particularly, bearings for the eccentric shaft) are damaged, so that the crushing function of the jaw crusher cannot be sufficiently secured. is there.

In the prior art described in Japanese Patent No. 2777773, when foreign matter is introduced into the crushing device, the foreign matter is detected as a decrease in the rotational speed of the crushing hydraulic motor, and the feeder is stopped to stop the crushed material. To stop the supply of water. However, since the feeder stops after foreign matter has already been introduced into the crushing apparatus, there is a possibility that the crushing apparatus may be damaged by foreign matter remaining in the continuously operating crushing apparatus. Even if the configuration of the prior art is further applied and the crushing device is stopped at the same time as the feeder is stopped by the control means, the rotation of the crushing hydraulic motor is reduced after the foreign matter is input until the rotation speed of the crushing hydraulic motor decreases. Since a certain time delay occurs, there is a possibility that the crushing device may be damaged by residual foreign matter before the crushing device stops, and there is a possibility that the crushing function of the crushing device may not be sufficiently secured.

An object of the present invention is to provide a crushing abnormality detecting device for a self-propelled crusher which can sufficiently secure the crushing function of the crushing device by preventing damage to the crushing device, and a self-propelled crushing device using the same. To provide machines.

[0015]

(1) In order to achieve the above object, the present invention provides a first detecting means for detecting a vibration of a self-propelled crusher having a crushing device, and the detected vibration. And a first determining means for determining whether or not the crushing device is in an abnormal state in which foreign matter that is difficult to crush or that cannot be crushed has been input based on the above. (2) In order to achieve the above object, the present invention also provides a second detecting means for detecting a vibration of a crusher of a self-propelled crusher,
A second determination unit configured to determine, based on the detected vibration, whether the crushing apparatus is in an abnormal state in which foreign matter that is difficult to crush or that cannot be crushed has been input. The vibration generated when the object to be crushed introduced into the crushing device is crushed has a certain correspondence with the shape and material of the object to be crushed.
For example, vibration characteristics (for example, small amplitude, the same applies hereinafter) of concrete pieces and asphalt pieces that can be easily crushed, rocks having low uniaxial compressive strength, and foreign materials that are difficult to crush, for example, steel materials such as H steel. It has a different aspect from the vibration characteristics (for example, the amplitude is increased) of the derived iron scraps and rocks having particularly strong uniaxial compressive strength. Therefore, in the present invention of (1) or (2), the vibration is detected by the first or second detecting means, and based on this vibration, the first or second determining means determines whether the crushing device is in an abnormal state. Determine whether As a result, it is possible to detect an abnormal state in which foreign matter is mixed immediately after the crushing object is thrown in and the crushing operation by the crushing device is started. Therefore, for example, by causing the display means to perform a predetermined display based on a signal corresponding to this detection, the operator can quickly stop the crushing device,
Alternatively, the operation of the crusher can be quickly stopped by the control means based on a signal corresponding to the detection. Thus, unlike the conventional technology in which the abnormal state of the crushing device is detected as a decrease in the rotational speed of the hydraulic motor for crushing, the crushing device is quickly stopped with almost no time delay to prevent breakage of the crushing device. Can be. Furthermore, unlike the conventional technology that connects the hydraulic cylinder to the toggle plate,
The function of preventing the crushing device from being broken can be effectively exerted regardless of the position of the foreign matter in the crushing device. Therefore,
The crushing function of the crushing device can be sufficiently ensured.

(3) In the above (1) or (2), preferably, the first or second judging means sets the crushing device when the amplitude of the detected vibration is equal to or larger than a threshold value. It is determined that the state is abnormal.

(4) In the above (1) or (2), preferably, the first or second judging means periodically changes the state in which the amplitude of the detected vibration is equal to or larger than a threshold value. It is determined that the crushing device is in the abnormal state only when it occurs a plurality of times continuously.

Thus, it is possible to prevent the case where the amplitude is temporarily increased due to some accidental phenomenon rather than the abnormal state of the crushing apparatus from being erroneously detected as an abnormal state. Can be improved.

(5) In the above (2), preferably, the second detecting means is a measuring means for measuring a vibration at a predetermined portion of the self-propelled crusher, and the crushing is performed based on the detected vibration. Vibration determining means for determining the vibration of the device.

(6) In the above (1) or (2), preferably, when the first or second determination means determines that the crushing apparatus is in the abnormal state, a corresponding abnormality signal is generated. The apparatus further includes an abnormal signal output means for outputting.

(7) In the above (1) or (2), and preferably, when the first or second determination means does not determine that the crushing apparatus is in the abnormal state, a corresponding normal signal is output. And a normal signal output means for performing the operation.

(8) In the above (6) or (7), it is more preferable that the apparatus further comprises a display unit to which the abnormal signal or the normal signal is input and performs a display according to the input signal.

(9) In the above (6) or (7), further preferably, the abnormal signal or the normal signal is inputted, and further comprising a control means for stopping the operation of the crushing device in accordance with the input signal. .

(10) In the above (9), more preferably, the control means is provided in a hydraulic pipeline connecting a hydraulic motor for crushing and a hydraulic motor for driving the crushing device. Crushing control valve means for controlling the supply of pressure oil to the crushing hydraulic motor is provided.

(11) In order to achieve the above object, the present invention relates to a self-propelled crusher for crushing an object to be crushed by a crushing device and carrying the crushed object out of a main body by a conveyor. First detecting means for detecting the vibration of the crusher, and a first determination for judging, based on the detected vibration, whether or not the crushing device is in an abnormal state in which foreign matter that is difficult to crush or that cannot be crushed has been introduced. Means.

(12) In order to achieve the above object, the present invention relates to a self-propelled crusher for crushing a material to be crushed by a crushing device and carrying out the crushed material outside a main body by a conveyor. Second detection means for detecting vibration of
A second determination unit configured to determine, based on the detected vibration, whether the crushing apparatus is in an abnormal state in which foreign matter that is difficult to crush or that cannot be crushed has been input.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a crushing abnormality detecting apparatus for a self-propelled crusher according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the entire structure of a self-propelled crusher to which the abnormality detection device according to the present embodiment is applied.
3 is a partially transparent side view of the self-propelled crusher shown in FIG. 1, FIG. 3 is a top view of the self-propelled crusher shown in FIG. 1, and FIG. FIG. 3 is a partially enlarged perspective view in FIG. 2 showing a detailed structure of a jaw crusher 3 (described later) shown in FIG.

In FIG. 1 to FIG. 4, the self-propelled crusher 1 receives a crushed object by a working tool such as a bucket of a hydraulic shovel, and receives the crushed object by a hopper 2 and a hopper 2. A crusher body 7 equipped with a crushing device for crushing the crushed material to a predetermined size and discharging the crushed material downward, for example, a jaw crusher 3 and a feeder 4 for conveying and guiding the crushed material received in the hopper 2 to the jaw crusher 3. The crushed material crushed by the jaw crusher 3 and discharged downward is received, transported to the rear side of the self-propelled crusher 1 (the right side in FIGS. 1, 2 and 3), and outside the crusher main body 7. Conveyor 5, which is provided above the conveyor 5, a magnetic separator 6 which magnetically sucks and removes magnetic substances contained in the crushed material being transported on the conveyor 5, and a magnetic separator 6 below the crusher main body 7. Provided And a Gyotai 8.

The traveling body 8 has a main body frame 9, which is connected to the jaw crusher 3,
The crusher mounting portion 9A on which the hopper 2, the power unit 32 (described later) and the like are mounted, and a track frame portion 9B connecting the crusher mounting portion 9A and the left and right crawler tracks 8a as traveling means. You. The crawler track 8a is stretched between a driving wheel 19 and a driven wheel (idler) 20, and is provided with a driving force by a traveling hydraulic motor 21 provided on the driving wheel 19, so that a self-propelled crusher is provided. Machine 1
Is to be run.

As shown in FIGS. 1 to 3, the jaw crusher 3 is mounted on an intermediate portion in the longitudinal direction (left and right directions in FIGS. 1, 2 and 3) of the main body frame crusher mounting portion 9A. . At this time, especially as shown in FIG.
The upper end of the swing jaw 3c provided with the swing jaw 3c is eccentrically attached to the rotating shaft (eccentric shaft) 3d, and the lower side of the swing jaw 3c is rotatably attached to the toggle sheet 3f of the toggle block 3e which is a fixed side. 3g. At this time, the strength of the toggle plate 3g is set to an appropriate value so that the toggle plate is preferentially broken when a non-crushable jaw crusher is thrown into the jaw crusher, similarly to this type of a known toggle plate. Is set to Further, both sides of the eccentric shaft 3d are rotatably supported by brackets 3h, and flywheels 12 for increasing inertial force are attached to both ends thereof.

Then, the driving force generated by the crusher hydraulic motor 10 is transmitted to an eccentric shaft 3d via a belt (not shown) and a flywheel 12, and is rotated. The rotation of the eccentric shaft 3d causes the swing jaw 3c to rotate. Is eccentrically rotated, and the lower side of the swing jaw 3c is reciprocated on an arc locus whose radius is the length of the toggle plate 3g around the toggle sheet 3f, thereby moving the moving teeth 3a to the fixed teeth 3b. Is oscillated back and forth to crush the object to be crushed supplied from the feeder 4 to a predetermined size.

At this time, the moving teeth 3a and the fixed teeth 3b
The housing 13 is located above and to the side of the crushing section
A cover 14 (same as above) is provided on the upper part of the housing 13 and is openable. By opening this cover, the situation of the moving teeth 3a and the fixed teeth 3b can be visually recognized from above. It has become.

The feeder 4 is a so-called grizzly feeder, and a plurality of sheets (two sheets in this example) on which the crushed objects from the hopper 2 are placed by the driving force generated by the feeder hydraulic motor 15. The bottom plate including the serrated plate 4a is vibrated. In this way, the crushed objects put into the hopper 2 are sequentially conveyed and supplied to the jaw crusher 3, and fine earth and sand attached to the crushed objects during the conveyance are dropped downward from the gaps between the saw teeth of the saw-tooth plate 4a. It is designed to be introduced onto the conveyor 5 via the chute 4b.

The conveyor 5 is provided with a belt 5a that is circulated and driven by a hydraulic motor 17 for the conveyor in order to place and transport the crushed material. The crushed material falling from the jaw crusher 3 onto the belt 5a is self-propelled. The crusher is transported to the rear side.

The magnetic separator 6 is provided with magnetic force generating means (not shown) by using a magnetic separator hydraulic motor 18 to move the magnetic separator belt 6a disposed above the conveyor belt 5a so as to be substantially orthogonal to the conveyor belt 5a. By driving around, the magnetic force from the magnetic force generating means acts on the belt 6a to attract the magnetic material to the belt 6a, and then is conveyed in a direction substantially orthogonal to the conveyor belt 5a, and is conveyed to the side of the conveyor belt 5a. It is designed to fall down. A power unit 32 is mounted on the upper part of the rear end in the longitudinal direction of the crusher mounting portion 9A of the main body frame 9 via a power unit loading member 16 (see FIG. 1).

The power unit 32 controls the pressure applied to hydraulic actuators such as the hydraulic motors 10 for crusher, hydraulic motor 15 for feeder, hydraulic motor 17 for conveyor, hydraulic motor 18 for magnetic separator, and hydraulic motor 21 for left / right running. At least one hydraulic pump 54 for discharging oil (not shown, see FIG. 5 described later), an engine 55 (the same as a prime mover) for driving the hydraulic pump 54, and supply from the hydraulic pump 54 to the hydraulic actuator And a control valve device (not shown) having a plurality of control valves (the same) for controlling the flow of the pressurized oil.

A driver's seat 42 on which an operator rides is provided in front of the power unit 32 (the left side in FIGS. 1, 2 and 3). Thus, during the crushing operation, the supply state of the crushed object by the feeder 4 and the crushing state by the jaw crusher 3 can be monitored to some extent.

Here, the jaw crusher 3, the feeder 4, the conveyor 5, the magnetic separator 6, and the track crawler 8a
Is driven by a hydraulic drive device including the crusher hydraulic motor 10, the feeder hydraulic motor 15, the conveyor hydraulic motor 17, the magnetic separator hydraulic motor 18, and the traveling hydraulic motor 21.

FIG. 5 is a hydraulic circuit diagram showing a structure of a main part related to a crusher hydraulic motor 10 in a hydraulic drive device provided in the self-propelled crusher 1. In FIG. 5, the hydraulic drive device includes the engine 55 and at least one hydraulic pump (hereinafter simply referred to as a hydraulic pump 5) driven by the engine 55 and including the hydraulic pump 54.
4), and the hydraulic oil discharged from the hydraulic pump 54 is supplied and the hydraulic motors 10, 15, 17, 1
A plurality of hydraulic actuators including the control valves 8 and 21 and a plurality of the control valves including a crusher control valve 56 for controlling the flow of hydraulic oil supplied from the hydraulic pump 54 to the plurality of hydraulic actuators;
A relief valve 57 provided in a pipe branched from the discharge pipe of the hydraulic pump 54 and defining a maximum value of the pump discharge pressure.
And an operation panel (not shown) as an operation means by which an operator can start and stop the jaw crusher 3, the feeder 4, the conveyor 5, and the magnetic separator 6, and the like.

The crusher control valve 56 includes:
When a drive current from the operation circuit device 100 (see FIG. 6 described later) is input to the drive unit 56a1 or 56a2, a solenoid provided in the drive unit 56a1 or 56a2 is provided.
SOL1 or SOL2 (same) is excited and the spool can be switched. That is, when a drive current is input to the solenoid SOL1 (or SOL2) of the drive section 56a1 (or 56a2, the same applies to the following), the crusher control valve 56 is switched to the left position (or right position) in FIG. The hydraulic oil from the hydraulic pump 54 is guided to the crusher hydraulic motor 10 by communicating the oil supply pipe 58, and the crusher hydraulic motor 10 is driven in the normal rotation direction (or the reverse rotation direction). Then, the driving section 56a1 (or 56
When the drive current value to the solenoid SOL1 (or the solenoid SOL2) of a2) becomes 0, the spring 56b2 (or the spring 56b)
It returns to the neutral position by the restoring force of 1), shuts off the pressure oil supply line 58, and stops the crusher hydraulic motor 20.

At this time, although not particularly shown, other devices,
That is, the feeder 4, the conveyor 5, and the feeder hydraulic motor 15, the conveyor hydraulic motor 17, the magnetic separator hydraulic motor 18, and the left and right traveling hydraulic motors 21 that drive the magnetic separator 6 and the traveling body 8, respectively, Control valve similar to control valve 56 (control valve for feeder, control valve for conveyor,
A control valve for the magnetic separator and control valves for left and right running are provided, and pressure oil from the hydraulic pump 54 is supplied while the flow is controlled by the control valves. Each of the control valves, except for the left and right traveling control valves, is provided with a drive unit having a solenoid similar to that described above, and these solenoids, together with the solenoids SOL1 and SOL2, are provided with a self-propelled crusher. 1 constitutes a part of the operation circuit device 100 (see FIG. 6 described later) that operates each device.

The operation panel is used for starting and stopping each device (the jaw crusher 3, the feeder 4, the conveyor 5, and the magnetic separator 6).
0 and a crusher reverse rotation button 59a2 (see FIG. 6 described later) and a crusher reverse rotation button 59a2 (the same) for driving the jaw crusher 3 forward and reverse by driving the crusher hydraulic motor 10 in the forward rotation direction and the reverse rotation direction, respectively. A crusher stop button 59a3 (same) for stopping and stopping the jaw crusher 3, a feeder start button (not shown) for driving the feeder hydraulic motor 15 to start the feeder 4, and a conveyor hydraulic motor 17 for driving A plurality of operation buttons, a switch, a dial, and the like, including a conveyor start button (the same) for starting the conveyor 5 by pressing and a magnetic separator start button (the same) for driving the magnetic separator hydraulic motor 18 to start the magnetic separator 6. Have. Each button, switch, dial, and the like of this operation panel also constitute a part of the operation circuit device 100 that operates each device of the self-propelled crusher 1.

FIG. 6 is an electric circuit diagram showing an example of the main structure of the operation circuit device 100 of the self-propelled crusher 1 related to the jaw crusher 3.

In FIG. 6, a DC 24 V is guided to the bus 101 on the power supply side, and a crusher normal rotation button 59a of the operation panel described above is provided between the power supply side bus 101 and the ground wire 102.
1. Crusher normal rotation contact 103, crusher reverse rotation contact 104, which are built in and interlock with the crusher reverse rotation button 59a2 and the crusher stop button 59a3, respectively.
And the crusher stopping contact 105 and the driving unit 5 described above.
6a1 and the solenoid SO provided in 56a2, respectively.
L1, SOL2, coil parts R1 to R4 of relay,
Relay contact portions R1 'to R4', which become conductive when these relay coil portions R1 to R4 are excited, and crusher stop switches 106a and 106b which operate in response to a signal from a vibration analyzer 150 described later, They are connected as shown.

The contact 103 for crusher normal rotation is a contact portion 1
03a and a contact portion 103b. Normally, the contact portion 103a is open and the contact portion 103b is closed.
When the crusher normal rotation button 59a1 of the operation panel is pressed, the contact 103a closes and the contact portion 103b opens only while the crusher normal rotation button 59a1 is pressed. The crusher reverse contact 104 includes a contact portion 104a and a contact portion 104b.
Are open, and the contact portion 104a is in a closed state. And
When the crusher reverse rotation button 59a2 of the operation panel is pressed, the contact 104b is closed and the contact portion 104a is opened only while the crusher reverse button 59a2 is pressed. The contact 105 for stopping the crusher includes contact portions 105a and 105b, and both of them are normally in a closed state. And
When the crusher stop button 59a3 of the operation panel is pressed, the contact portions 105a, 1a are held only while the crusher stop button 59a3 is pressed.
05b is opened.

Crusher stop switch 106a, 10
6b are normally both closed. The switches 106a and 106b are opened when a shutoff signal is input from a vibration analyzer 150 described later.

In the hydraulic drive device and the operation circuit device 100 having the above configuration, when it is desired to start the jaw crusher 3 in the normal rotation direction from the stopped state, the crusher normal rotation button 59a1 on the operation panel is pressed. In 6, the contact portion 103 b of the crusher forward rotation contact 103 is opened while the contact portion 103 a is closed only during the pressing. As a result, DC 24 V is supplied to the relay coil units R1 and R2 to excite them. When the relay coil portion R1 is excited, the relay contact portion R1 'closes and conducts, so that the solenoid S provided in the crusher forward rotation driving portion 56a1 is provided.
A drive current is supplied to OL1 to excite solenoid SOL1. On the other hand, at this time, the relay contact portion R2 'connected in parallel with the contact portion 103a by the excitation of the relay coil portion R2.
Is closed and conductive, so that even if the operator once presses and releases the crusher forward rotation button 59a1 and the contact portion 103a of the crusher forward rotation contact 103 is opened, the relay coil portions R1 and R2 are continuously excited, As a result, the solenoid SOL1 maintains the excited state. Thereby, the crusher control valve 56 in FIG. 5 is switched to the left position in the figure, and the pressure oil from the hydraulic pump 54 is guided to the crusher hydraulic motor 10 to drive the crusher hydraulic motor 10 in the normal rotation direction.

On the other hand, when it is desired to start the jaw crusher 3 in the reverse direction from the stopped state, when the crusher reverse rotation button 59a2 is pressed, the contact portion 10a of the crusher reverse contact 104 opens while the contact portion 104b closes. As a result, the relay coil portions R3 and R4 are excited, and the solenoid of the driving portion 56a2 is turned on by the conduction of the relay contact portion R3 '.
SOL2 is excited. At this time, the excitation of the relay coil portion R4 closes the relay contact portion R4 'and conducts.
Thereafter, even when the contact portion 104b of the crusher reverse contact 104 is opened, the solenoid SOL2 maintains the excited state. As a result, the crusher control valve 56 is switched to the right position in the drawing in FIG. 5, and the crusher hydraulic motor 10 is driven in the reverse direction.

When it is desired to stop the jaw crusher 3 from being driven in the normal rotation direction (or the reverse rotation direction, the same applies hereinafter) as described above, when the crusher stop button 59a3 is pressed, only when the crusher stop button 59a3 is pressed. The contact portions 105a and 105b of the crusher stop contact 105 are both opened. As a result, the current supplied to the relay coil units R1, R2 (or the relay coil units R3, R4) is cut off,
These relay coil parts R1, R2 (or relay coil part R
(3, R4) returns to the non-excited state. When the relay coil portion R1 (or the relay coil portion R3) returns to the non-excited state, the relay contact portion R1 '(or the relay contact portion R3') opens and cuts off, so that the crusher normal rotation driving portion 56a1 (or the crusher reverse rotation). The drive current to the solenoid SOL1 (or the solenoid SOL2) provided in the drive section 56a2) is cut off. Also, at this time, the relay coil portion R2 (or the relay coil portion R4) returns to the non-excited state, so that the relay contact portion R2 '(or the relay contact portion R4') is cut off, so that the operator presses the crusher stop button 59a3. Even if it is pressed once and then released, even if the contact portions 105a and 105b of the crusher stop contact 105 are both closed, the non-excited state of the relay coil portions R1 and R2 (or the relay coil portions R3 and R4) is maintained. Result solenoid SOL1 (or SO
L2) maintains the de-energized state. As a result, in FIG. 5, the crusher control valve 56 is connected to the spring 56b2.
(Or the spring 56b1) returns to the neutral position due to the restoring force of the spring, and the pressure oil guided from the hydraulic pump 54 to the crusher hydraulic motor 10 is shut off, and the drive of the crusher hydraulic motor 10 is stopped.

At this time, although not particularly shown, other devices,
That is, as for the feeder 4, the conveyor 5, and the magnetic separator 6, the feeder start button, the conveyor start button, and the corresponding control valve for the feeder, and the conveyor A known circuit for driving the solenoid of the control valve and the control valve for the magnetic separator is provided in the operation circuit device 100. When the operation buttons, switches, dials and the like are pressed, the solenoid of the corresponding control valve is operated. Is excited, and the control valve is switched.

The crushing abnormality detecting device for a self-propelled crusher according to the present embodiment includes a jaw crusher 3 provided in the self-propelled crusher 1 as described above, in which a crushable or non-crushable foreign matter (for example, , Iron scraps derived from steel materials such as H steel, rocks having particularly high uniaxial compressive strength, etc.) are detected, and an accelerometer 152 for detecting vibration and a driver's seat 42 in the power unit 32 are detected. A vibration analyzer 150 provided on the right side (upper side in FIG. 3) (see FIGS. 1 to 3);
A patrol light 151 for indicating that the abnormal state has occurred in the jaw crusher 3, a portion of the operation circuit device 100 relating to the jaw crusher 3 shown in FIG.
The hydraulic drive unit includes a crusher control valve 56 shown in FIG. The accelerometer 1
Reference numeral 52 denotes a known device that detects the vibration of the self-propelled crusher 1, particularly the vibration (acceleration) in the jaw crusher 3, and for example, a portion in or near the jaw crusher 3 (for example, indicated by an imaginary line in FIG. 4). It is provided at the rear position of the toggle block 3e or at the bearing of the eccentric shaft 3d. And the vibration analyzer 1
50 is connected by a cable. It is needless to say that the sensor is not limited to the accelerometer as long as it can detect vibration, and may be another sensor or the like.

The vibration analyzer 150 analyzes the vibration detected by the accelerometer 152, although its detailed structure is not shown. FIG. 7 shows the vibration analyzer 15.
9 is a flowchart illustrating a procedure of an analysis process performed by the first analysis unit.
In FIG. 7, first, in step 10, a vibration detection signal detected by the accelerometer 152 is input, and then the process proceeds to step 20, where the signal is amplified by an amplification amplifier (not shown) built in the vibration analyzer 150. The detection signal is amplified to a voltage value that can be analyzed.

Thereafter, the process proceeds to step 30, where the amplitude of the extracted vibration signal is reduced by a known comparator (not shown) built in the vibration analyzer 150.
It is determined whether or not the amplitude is equal to or larger than a predetermined value (described later) of the amplitude preset and stored in a well-known storage unit built in 50. If the amplitude of the extracted signal is less than the predetermined value, this determination is not satisfied, and the process returns to step 10 and the above procedure is repeated.

If the amplitude of the extracted signal is equal to or greater than the predetermined value, the determination is satisfied and the routine goes to step 40, where the known counter circuit (not shown) built in the vibration analyzer 150 satisfies the determination. Is determined periodically (for example, three times are stored in advance in the storage means in advance). If the determination is not satisfied, for example, if it is not periodic, if it is not a plurality of times consecutively, or the like, the process returns to step 10 and the above procedure is repeated again.

If the determination is satisfied, step 50
The extraction signal having an amplitude equal to or greater than the predetermined value is held for a predetermined time in a hold circuit built in the vibration analyzer 150.
This signal is output as a signal for lighting 1 and is also output as a cutoff signal for the crusher stop switches 106a and 106b in step 70, and this flow is terminated.

In the configuration described above, the accelerometer 152 constitutes first detecting means for detecting the vibration of the self-propelled crusher and detecting the vibration of the crushing device. The second detecting means is also configured. In addition, the comparator and the counter circuit incorporated in the vibration analyzer 150 and the steps 30 and 40 executed by the comparator and the counter determine whether or not the crushing device is in an abnormal state in which foreign matter that is difficult to crush or that cannot be crushed has been input. It corresponds to the first determining means and the second determining means. Steps 60 and 7
0 corresponds to an abnormal signal output unit that outputs a corresponding abnormal signal when the crushing device is determined to be in the abnormal state by the first or second determination unit. And patrol light 15
1 constitutes a display unit that receives an abnormal signal and performs a display according to the input signal.

By the way, in step 60, when the jaw crusher 3 is in an abnormal state, a lighting signal corresponding to the abnormal state is output to the patrol light 151, but the invention is not limited to this. That is, when the determination in step 30 or step 40 is not satisfied, step 60 'similar to step 60 is provided while returning to step 10, and steps 10 to 30 (or 40) are repeated (=
If the jaw crusher is not in an abnormal state), a corresponding lighting signal as a normal signal may be output to the patrol light 151 in step 60 'so as to be lit.
In this case, when the determinations of steps 30 and 40 are satisfied and the process proceeds to step 60 via step 50, it is sufficient to shut off the lighting signal as a normal signal and turn off the patrol light 151.

Similarly, in step 70, when the jaw crusher 3 is in an abnormal state, a switch cutoff signal as an abnormal signal corresponding to the abnormal state is output to the crusher stop switches 106a and 106b and these switches 106
Although a and 106b are cut off, it is not limited to this. That is, conversely, when the determination in step 30 or step 40 is not satisfied, step 70
Step 70 'similar to that described above is provided.
(Or 40) while repeating this step 70 '.
Then, a switch conduction signal as a normal signal corresponding to this is output to the switches 106a and 106b so as to communicate with each other, and when the process proceeds to step 70, the conduction signal as the normal signal is cut off to allow other means (for example, a spring). Means)
The switches 106a and 106b may be shut off by the switch.

In the above two cases, step 60 and step 70 are performed according to the first step described in the claims.
Alternatively, it corresponds to a normal signal output unit that outputs a corresponding normal signal when the crushing device is not determined to be in the abnormal state by the second determination unit. And patrol light 151,
A display means for receiving a normal signal and performing a display according to the input signal.

The crusher hydraulic motor 10 shown in FIG. 5 of the hydraulic drive unit constitutes a crushing hydraulic motor, and the crusher control valve 56 comprises a crushing hydraulic motor for driving the crushing device, a hydraulic source, Crushing control valve means for controlling the supply of pressure oil from a hydraulic source to a crushing hydraulic motor provided in a hydraulic pipeline connecting the crusher control valve 56 and the operating circuit device 100 The portion relating to the jaw crusher 3 shown in FIG. 6 constitutes a control means to which an abnormal signal or a normal signal is inputted and which stops the operation of the crushing device in accordance with the input signal.

Next, the operation and operation of the embodiment of the crushing abnormality detecting apparatus for a self-propelled crusher according to the present invention described above will be described.

For example, when the self-propelled crusher 1 is self-propelled, the hydraulic oil from the hydraulic pump 54 travels in the control valve device which is switched according to the operation of the operation levers 52 and 53 of the driver's seat 42. Is supplied to the traveling hydraulic motor 21 through a control valve (not shown) for driving the endless track crawler 8a and the traveling body 8 travels.

During the crushing operation, for example, the driver's seat 42
In the operation panel provided in, the magnetic separator start button,
The conveyor start button, the crusher normal rotation button,
When the feeder start button is sequentially pressed, the control valve for the magnetic separator (not shown), the control valve for the conveyor (the same), the control valve for the crusher 56, and the control valve for the feeder (the same) as described above. Is switched, whereby the hydraulic oil from the hydraulic pump 54 is supplied to the corresponding hydraulic motors 18, 17, 10, 15 via these control valves, whereby the magnetic separator 6, the conveyor 5, the jaw crusher 3, And the feeder 4 is activated. When the objects to be crushed are thrown into the hopper 2 by, for example, a bucket of a hydraulic shovel or the like in a state where the respective devices are activated, only those having a predetermined particle size or more are sorted in the feeder 4 while the thrown objects are being sorted. It is guided to the jaw crusher 3 and is crushed by the jaw crusher 3. The crushed crushed material is discharged from the space below the jaw crusher 3, falls on the conveyor 5, is received, is conveyed to the rear side of the self-propelled crusher 1 (opposite to the hopper 2), and is conveyed. The magnetic material mixed in the crushed material is removed by the magnetic separator 6 on the way, and is finally carried out from the rear part (the right end in FIG. 1) of the self-propelled crusher 1. In the context of the recent promotion of waste recycling, some of the materials to be crushed, such as various kinds of large and small rocks and construction waste generated at construction sites, industrial waste, and natural stones, are extremely diverse. However, during the crushing operation as described above, the crushed material supplied from the hopper 2 contains foreign matter that is difficult or impossible to be crushed by the jaw crusher 3 (for example, steel material such as H steel). Iron scraps, rocks having particularly high uniaxial compressive strength, etc.), the foreign matter may be clogged in the jaw crusher 3 and the jaw crusher 3 may be damaged. Need to be prevented beforehand.

In this embodiment, the characteristic of the vibration generated from the jaw crusher 3 is utilized to prevent the jaw crusher 3 from being damaged. That is, the vibration of the crushing device such as the jaw crusher 3 generally has a certain correspondence with the shape and material of the crushed object. This will be described with reference to FIGS. 8 and 9 show an example for explaining that the intensity (amplitude) of the vibration changes depending on the degree of difficulty of crushing the object to be crushed, and the amplitude (acceleration) of the vibration is plotted on the horizontal axis with time. Is represented.
FIG. 8 shows an example of vibration in the case of easily crushable concrete pieces and asphalt pieces, rocks having low uniaxial compressive strength (hereinafter referred to as easily crushable objects), and FIG. 3 shows an example of vibration in the case of a foreign substance that is difficult to perform, for example, iron scrap derived from a steel material such as H steel, rock having a particularly strong uniaxial compressive strength, or the like. As shown in these figures,
The crushing in the jaw crusher 3 is performed as described above.
Since this is due to the oscillating movement of the fixed tooth 3a and the fixed teeth 3b, the peaks of the detected vibrations in each of the figures are such that the peaks of the detected vibrations are periodically continuous at predetermined time intervals. When the easily crushable material shown in FIG. 8 is charged, the vibration is relatively small and the peak value b1 of the amplitude is small, whereas when the foreign material shown in FIG. 9 is charged, the vibration is relatively large and the peak value b2 of the amplitude is large.

In the present embodiment, attention is paid to the difference in amplitude as described above. During the crushing operation, the vibration in the jaw crusher 3 is detected by the accelerometer 152, and the vibration analyzer 150 makes a predetermined judgment. Do. That is, in step 30 of FIG. 7 described above, the predetermined amplitude level as a reference for comparison is set to, for example, b0 shown in FIGS. 8 and 9, and it is determined whether or not the amplitude level of the vibration is higher than this. . That is, for example, when the easily crushable object shown in FIG. 8 is input, the maximum value of the amplitude in a predetermined time range (for example, the entire range of the horizontal axis shown in FIG. 8) becomes b1max as shown in FIG.
It becomes smaller than 0, and the determination in step 30 is not satisfied. At this time, the above-mentioned b0 constitutes an example of the threshold value of the amplitude of the vibration described in the claims. On the other hand, FIG.
When a foreign substance is introduced as shown in (1), the maximum value of the above-mentioned predetermined time range (for example, the entire range of the horizontal axis shown in FIG. 9) becomes b2max, which is larger than b0, and the determination in step 30 is satisfied.

Thus, the patrol light 151 is turned on by the lighting signal in step 60, so that the operator of the self-propelled crusher 1 can be notified that an abnormal situation has occurred. Thereafter, in step 70, a cutoff signal is issued, whereby the crusher stop switches 106a and 106b of the operation circuit device 100 are switched to a cutoff state (see FIG. 6). As a result, the current supplied to the relay coil portions R1, R2 (or the relay coil portions R3, R4) is cut off, and the relay contact portion R1 '(or the relay contact portion R3') is opened and cut off. Drive section 56a1 (or drive section 5 for crusher reverse rotation)
6a2) equipped with solenoid SOL1 (or solenoid S)
The drive current to OL2) is cut off. As a result, the crusher control valve 56 returns to the neutral position in FIG. 5, shuts off the pressure oil guided from the hydraulic pump 54 to the crusher hydraulic motor 10, and releases the jaw crusher 3.
Crushing operation stops.

In the present embodiment, as described above, by detecting an abnormal state in which a foreign object has been thrown into the jaw crusher 3 based on the detected vibration, the object to be crushed is thrown and the crushing operation by the jaw crusher 3 starts. Immediately after the operation, the abnormal state is immediately detected, and the operation of the jaw crusher 3 can be quickly stopped. Thus, unlike the related art (the above-mentioned Japanese Patent No. 2777773), which detects an abnormal state of the crushing device as a decrease in the rotational speed of the crusher hydraulic motor, the jaw crusher 3 is quickly stopped with almost no time delay and the jaw crusher is stopped. 3
Can be prevented beforehand. Also, a conventional technique of connecting a hydraulic cylinder to a toggle plate (Japanese Patent Laid-Open No.
Unlike JP-A-58450, the function of preventing the jaw crusher from being damaged can be effectively exerted regardless of the position of the foreign matter in the jaw crusher 3. Therefore, the crushing function of the jaw crusher 3 can be sufficiently ensured.
In the present embodiment, step 40 in the flow of FIG.
In the above, the abnormal condition is determined only when the condition that satisfies the condition of the step 30 occurs periodically plural times continuously. It is possible to prevent a case where the amplitude of vibration temporarily increases due to some accidental phenomenon from being erroneously detected as an abnormal state, and to improve the accuracy of abnormality detection.

In the embodiment of the present invention, in step 40 of the flow of FIG.
Although it was determined whether the state satisfying the determination of 0 has occurred periodically and continuously a plurality of times, the present invention is not limited to this. That is, as described above, the determination in step 40 is for improving the accuracy of abnormality detection, and as long as the effect of sufficiently securing the crushing function of the jaw crusher 3, which is a basic effect of the present invention, is obtained. Is Step 40
May be omitted, and the process may proceed to step 50 as soon as the determination in step 30 is satisfied.

Further, in the embodiment of the present invention, in the flow of FIG. 7, in step 30, the amplitude of the vibration detected in step 10 and amplified in step 20 is simply compared with a predetermined amplitude level. Although it did, it is not limited to this. That is, a new step 25 is provided between step 20 and step 30, and this step 25
Then, a frequency analysis is performed by a known band-pass filter (not shown) built in the vibration analyzer 150, and a predetermined frequency band (in the vibration analyzer 150) of the vibration detected in step 10 and amplified in step 20. 4 to 5 which roughly correspond to vibrations of a crushing device such as a jaw crusher 3 which are preset and stored in a storage means incorporated therein.
Hz) (or a component of a predetermined frequency) is extracted.
The determination may be made at 0. In this case, the accelerometer 152
Is not limited to the vicinity of the jaw crusher 3. That is, the vibration of the crushing device such as the jaw crusher 3 is, for example, 4 to 5 Hz as described above, but the frequency band is different, for example, 10 to 18 Hz in the grizzly type feeder 4 and 30 to 35 Hz in the engine 55, for example. Even if these various types of vibrations are mixed with the detected vibrations, the vibration of the jaw crusher 3 to be obtained can be obtained by the above-described frequency analysis. Therefore, for example, the self-propelled crusher such as the power unit 32 or the vicinity of the feeder 4 can be obtained. 1
Of these, the accelerometer 152 can be provided at a desired portion relatively far from the jaw crusher 3. In this structure, the accelerometer 152 constitutes a measuring means for measuring a vibration at a predetermined portion of the self-propelled crusher described in the claims, and the vibration analyzer 150 detects the crusher based on the detected vibration. And a vibration determining means for obtaining the vibration of the vibration.

As described above, the amplified signal of the vibration may be digitally processed and analyzed by a band-pass filter (not shown) built in the vibration analyzer 150 instead of performing the frequency analysis as an analog signal. FIG. 10 is a flowchart showing the procedure of the analysis process in such a modification.

FIG. 10 differs from the flow of the above embodiment shown in FIG.
Are provided with four steps of Steps 25A to 25D, and Step 50A is provided instead of Step 50.

That is, in step 25A, the vibration detection signal amplified in step 20 is
After sampling by a known sampling hold (not shown) built in the vibration analyzer 50, a known A / D built in the vibration analyzer 150 in step 25B.
A / D conversion is performed by the converter (same as above). Then, Step 25
C, the digitally converted signal is FFT-transformed by a computer (same as above) provided in the vibration analyzer 150 to be converted into a predetermined frequency band, and the component of the frequency band (or the component of the predetermined frequency) is converted. Extract. Then, in step 25D, the extracted vibration component is
After the T inverse conversion, the process proceeds to step 30 where the amplitude is compared with a predetermined value.

Thereafter, step 40 shown in FIG. 7 is performed, and the process proceeds to step 50A where D / A conversion is performed by a known D / A converter (not shown) built in the analyzer. Subsequent steps are the same as the flow shown in FIG. Even when such an analysis process is performed, the same effect as described above is obtained.
Further, in the above-described embodiment of the present invention, the accelerometer 152 and the vibration analyzer 150 are configured separately, but the invention is not limited thereto.
The analysis unit 52 may be configured as an integrated analysis unit.

Further, in the embodiment of the present invention, the operator of the crusher is notified of the occurrence of an abnormal situation by using the patrol light 151. However, the present invention is not limited to this. For example, an alarm by voice or the like may be used.

In the embodiment of the present invention, the jaw crusher 3 is connected to the hydraulic motor 10 for crusher.
However, the present invention is not limited to this, and it may be driven by, for example, an electric motor. In this case, the operation circuit device 1 shown in FIG.
A known contactor for starting and stopping the electric motor may be connected to the positions of the solenoids 56a1 and 56a2. Also in this case, the same automatic stop function as described above can be realized, and the same effects as in the embodiment of the present invention can be obtained.

Further, in the embodiment of the present invention, a self-propelled crusher having a jaw crusher 3 for crushing the moving teeth 3a and the fixed teeth 3b as a crushing device has been described as an example. Not limited to, other crushing devices, for example, a pair of roll-shaped rotating body equipped with a blade for crushing and rotating the pair in the opposite direction to each other, sandwiching the object to be crushed between these rotating bodies A rotary crusher (such as a six-axis crusher including a so-called roll crusher) for crushing, or a crusher (a so-called shredder) that is provided with a cutter on a shaft arranged in parallel and shears the crushed object by rotating them in opposite directions. And a crushing device that rotates a striking plate provided with a plurality of blades at a high speed, and impacts the striking plate and collides with a repulsion plate to impactably crush the object to be crushed. The so-called impact crusher)
Also, the present invention can be applied to a wood crushing machine that cuts wood, such as wood, branch wood, and construction waste wood, into small pieces by putting the wood into a rotor having a cutter. In these cases, the feeder 4 may be omitted. In these cases, similar effects can be obtained.

In one embodiment of the present invention, the feeder 4 uses the driving force of a hydraulic motor to
Although the self-propelled crusher 1 provided with the grizzly feeder for oscillating the bottom plate portion including the plurality of saw-toothed plates 4a on which the objects to be crushed are placed has been described as an example, the invention is not limited to this. That is, another type of feeder, for example, a crushed object input from a hopper is placed on a substantially flat bottom plate provided below the hopper, and the bottom plate is driven by a base driving mechanism based on a driving force generated by a hydraulic motor. Equipped with a so-called plate feeder that reciprocates in a substantially horizontal direction to sequentially extrude the preceding crushed object on the bottom plate by inputting the subsequent crushed object and sequentially supply the crushed object to the crushing device from the front end of the bottom plate. It is also applicable to shredders.

Further, in the embodiment of the present invention, as the auxiliary machines for performing the work related to the crushing operation by the crushing device, the feeder 4, the conveyor 5, and the magnetic separator 6 are used.
Although the description has been made by taking as an example a case where the present invention is applied to a self-propelled crusher provided with a crusher, the present invention is not limited to this. That is, a self-propelled crusher in which some of the feeder 4, the conveyor 5, and the magnetic separator 6 are appropriately omitted, for example, the crushed material is directly supplied from the hopper 2 to the jaw crusher 3 via the duct or chute without the feeder 4. For example, the magnetic separator 6 may be omitted depending on the work situation. Conversely, in addition to the feeder 4, the conveyor 5, and the magnetic separator 6, additional auxiliary machines, for example, an auxiliary conveyor disposed downstream (or upstream) of the conveyor 5 to lengthen the path of the conveyor 5 ( The present invention may be applied to a secondary conveyor) or a self-propelled crusher provided with a vibrating screen located downstream of the jaw crusher 3 for further sorting according to the particle size of the crushed material.

[0079]

According to the present invention, the vibration is detected by the first or second detecting means, and based on the vibration, the first or second determining means determines whether or not the crushing device is in an abnormal state. The crushing device can be stopped quickly with almost no time delay to prevent damage to the crushing device, and the function to prevent damage to the crushing device is effective regardless of the position of foreign matter in the crushing device. can do. Therefore, the crushing function of the crushing device can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire structure of a self-propelled crusher provided with an embodiment of a crushing abnormality detecting device for a self-propelled crusher of the present invention.

FIG. 2 is a partially transparent side view of the self-propelled crusher shown in FIG.

FIG. 3 is a top view of the self-propelled crusher shown in FIG.

FIG. 4 is a partially enlarged perspective view of FIG. 2;

FIG. 5 is a hydraulic circuit diagram showing a main part structure related to a crusher hydraulic motor in a hydraulic drive device provided in the self-propelled crusher shown in FIG.

6 is an electric circuit diagram showing an example of a main part structure related to a jaw crusher in an operation circuit device provided in the self-propelled crusher shown in FIG.

FIG. 7 is a flowchart showing a procedure of an analysis process performed by a vibration analyzer provided in the self-propelled crusher shown in FIG.

FIG. 8 is an explanatory diagram for explaining that the intensity (amplitude) of vibration changes depending on the degree of difficulty of crushing the object to be crushed.

FIG. 9 is an explanatory diagram for explaining that the intensity (amplitude) of vibration changes depending on the degree of difficulty of crushing an object to be crushed.

FIG. 10 is a flowchart illustrating a procedure of an analysis process in a modified example in which a detected vibration is digitally processed and frequency analysis is performed.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 self-propelled crusher 3 jaw crusher (crushing device) 10 hydraulic motor for crusher (hydraulic motor for crushing) 56 control valve for crusher (control valve means for crushing, control means) 100 operation circuit device (control means) 150 vibration analysis Apparatus (vibration determining means, first determining means, second determining means) 151 patrol light (display means) 152 accelerometer (measuring means, first detecting means, second detecting means)

Continued on the front page (72) Inventor Tadashi Shiohata 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Inside the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. F term in Tsuchiura factory (reference) 4D004 AA32 AA33 BA02 CA04 CA08 CA09 CB13 DA01 DA02 DA20 4D067 DD04 DD06 EE45 EE48 EE50 GA02 GA06 GA20 GB05

Claims (12)

[Claims] A first detecting means for detecting a vibration of a self-propelled crusher equipped with a crushing device; and a foreign substance which is difficult or impossible to be crushed by the crushing device based on the detected vibration. A crushing abnormality detection device for a self-propelled crusher, comprising: a first determination unit configured to determine whether the crushing machine is in an abnormal state. 2. A second detecting means for detecting a vibration of a crushing device of a self-propelled crusher, and an abnormal state in which the crushing device is loaded with foreign matter that is difficult or uncrushable based on the detected vibration. A crushing abnormality detection device for a self-propelled crushing machine, comprising: 3. The crushing abnormality detecting device for a self-propelled crusher according to claim 1, wherein the first or second determining means comprises:
A crushing abnormality detection device for a self-propelled crusher, wherein the crushing device is determined to be in the abnormal state when the amplitude of the detected vibration becomes equal to or larger than a threshold value. 4. The crushing abnormality detecting device for a self-propelled crushing machine according to claim 1, wherein the first or second determining means comprises:
The self-propelled vehicle characterized in that it is determined that the crushing device is in the abnormal state only when the state in which the amplitude of the detected vibration is equal to or larger than the threshold value occurs periodically plural times. Abnormality detection device for crushers. 5. The crushing abnormality detecting device for a self-propelled crusher according to claim 2, wherein said second detecting means is a measuring means for measuring a vibration at a predetermined portion of the self-propelled crushing machine, and the detection means is provided for detecting the vibration. And a vibration determining means for obtaining vibration of the crushing device based on the vibration. 6. The crushing abnormality detecting device for a self-propelled crusher according to claim 1, wherein the first or second determining means determines that the crushing device is in the abnormal state.
A crushing abnormality detecting device for a self-propelled crusher, further comprising an abnormal signal output means for outputting a corresponding abnormal signal. 7. A crushing abnormality detecting device for a self-propelled crusher according to claim 1, wherein said first or second determining means responds when said crushing device is not determined to be in said abnormal state. A crushing abnormality detection device for a self-propelled crusher, further comprising a normal signal output means for outputting a normal signal. 8. The crushing abnormality detecting device for a self-propelled crushing machine according to claim 6, further comprising a display unit to which the abnormal signal or the normal signal is inputted and which performs a display according to the input signal. A crushing abnormality detection device for a self-propelled crushing machine, characterized in that: 9. The crushing abnormality detecting device for a self-propelled crusher according to claim 6, wherein the abnormal signal or the normal signal is input, and the operation of the crushing device is stopped according to the input signal. A crushing abnormality detection device for a self-propelled crusher, further comprising means. 10. A crushing abnormality detecting device for a self-propelled crusher according to claim 9, wherein said control means is provided in a hydraulic line connecting a crushing hydraulic motor driving said crushing device and a hydraulic source. A crushing abnormality detecting device for a self-propelled crushing machine, further comprising crushing control valve means for controlling supply of pressurized oil from the hydraulic pressure source to the crushing hydraulic motor. 11. A self-propelled crusher for crushing an object to be crushed by a crushing device and carrying the crushed object out of a main body by a conveyor, comprising: first detection means for detecting vibration of the self-propelled crusher; A self-propelled crusher, comprising: a first determination unit configured to determine whether the crushing device is in an abnormal state in which a crushable or non-crushable foreign substance has been input, based on the detected vibration. . 12. A self-propelled crusher for crushing a material to be crushed by a crushing device and carrying out the crushed material to the outside of a main body by a conveyor, a second detecting means for detecting vibration of the crushing device, and detecting the vibration. A self-propelled crusher, comprising: a second determination unit configured to determine, based on the vibration, whether the crushing device is in an abnormal state in which foreign matter that is difficult to crush or that cannot be crushed has been input.