JP2003170081A - Self-propelling crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-propelling crusher, by which a worker can keep a close eye on crushing equipment so as to perform always a satisfactory crushing operation, and improve the productivity. <P>SOLUTION: This self-propelling crusher is provided with a signal indicator light 39, a pressure sensor 55, and a load indication controller 44b. The signal indicator light 39 comprises three indicators, i.e., an upper indicator 39a, a middle indicator 39b, and a lower indicator 39c. The sensor 55 detects a load pressure on an oil-hydraulic motor 10 for driving the crushing equipment 3. The load indication controller 44b determines whether a load on the crushing equipment 3 is comparatively small in a range of a normal load, moderate, or over-loaded on the basis of a load pressure signal P<SB>cr</SB>outputted from the pressure sensor 55, and the controller outputs an indication control signal Sp to the indicator of the signal indicator light 39 depending on the determination. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled crusher equipped with a crushing device for crushing an object to be crushed, for example, an automatic crusher equipped with a shearing type crusher for thinly cutting the object to be crushed. It concerns a traveling crusher.

[0002] For example, various kinds of rocks and construction wastes such as concrete lumps discharged when a building is demolished and asphalt lumps discharged during road repair, industrial wastes, natural stones, etc. There is a growing need for self-propelled crushers to improve incineration efficiency, reuse waste materials, and improve transportation efficiency by reducing volume by crushing.

This self-propelled crusher is provided with a running body provided with left and right endless track tracks, a crushing device provided on the upper part thereof, and a conveyor provided below the crusher, for example, a hopper. The object to be crushed is crushed to a predetermined size by the crushing device, and then the crushed product is transported from the space below the crushing device onto the conveyor, and finally the size is adjusted to some extent. Be carried out.

At this time, several types of crushing devices have already been proposed. For example, a cutter is fixed to each of a plurality of rotating shafts arranged substantially in parallel so as to bite the crushed object. A shear type crushing device (such as a biaxial shearing machine including a so-called shredder) for finely shearing, or a roll-shaped rotating body equipped with a crushing blade (bit) is set as a pair and the pair is rotated in opposite directions. , A rotary crushing device (a so-called roll crusher, etc.) that crushes the object to be crushed between the rotating bodies, or swings the moving teeth with respect to the fixed teeth so that the object to be crushed is sandwiched between them. A crushing device equipped with a jaw crusher for crushing and a striking plate equipped with multiple blades is rotated at high speed, and the crushed object is impacted by the striking from this striking plate and the collision with the repulsion plate. To grinding, crushing device and provided with a so-called impact crusher, wood, branches wood, timber crushing apparatus or the like to strip the by the rotor having a cutter wood such as construction waste wood.

[0005] These various crushing devices differ in the optimum object as the crushable object in view of their respective performances. Therefore, which crushing apparatus is to be used is appropriately selected according to the kind of the crushable object to be crushed. Is normal. Here, during the crushing operation as described above, when a crushable object having a size or amount exceeding the crushing ability of the crushing apparatus or a non-crushable foreign object is input, the crushable apparatus is clogged with the crushable object. There is a possibility that the crushing device will be stopped or damaged due to a load condition.

In order to address such a problem, for example, Japanese Patent Laid-Open No. 2000-24539 discloses a crusher load detecting means for detecting the number of rotations of a crusher (crusher) as a load, and the detected rotation. An overload determining means for determining whether or not an overload has occurred in the crushing device by comparing the number with a predetermined lower limit rotation speed, and a crusher for reversing (reversing) the crushing device when it is determined that an overload has occurred. A self-propelled crusher provided with a reversing means and a display means (notifying device) for lighting and displaying an alarm when the crusher is reversed or stopped.

[0007]

However, the above-mentioned conventional techniques have the following problems.

[0008] Based on the recent trend of promoting waste reuse (recycling), the Recycling Resources Promotion Law (so-called recycling law)
Since October 1991, the amount of crushed materials to be crushed, such as construction waste and industrial waste, has been increasing year by year under the trend of requiring the reuse of construction by-products. Against this background, it is strongly desired to improve the crushing efficiency and productivity of the self-propelled crusher in the crushing work. For that purpose, various state quantities and operating states indicating the operating state of the self-propelled crusher are detected and displayed at any time, and the user must closely monitor so that the crushing device can always perform a good crushing operation. Mandatory.

That is, for example, wear of crushing teeth in a crushing device, wear of a bearing portion, abnormality of a hydraulic pump for supplying pressure oil to a hydraulic motor for driving the crushing device, leakage of pressure oil from a pipe or clogging of a pipe, When an abnormal rotation of the engine that drives the hydraulic motor, an abnormality of the hydraulic filter, or the like occurs, it is difficult for the crushing device, which is the heart of the self-propelled crusher, to perform a good crushing operation. Then, the durability of the crushing device itself decreases (deteriorates) as unfavorable crushing operation continues, and the other components of the self-propelled crusher also bear an unreasonable burden, and their durability increases. Also, the frequency of repair and replacement of the crushing device and other components increases. The original crushing work cannot be performed during the repair / replacement work, resulting in a decrease in productivity.

In order to solve this problem, in the above-mentioned conventional technique, various state quantities indicating the operating state and the operating state itself are not displayed, but deviate from the normal state such as when the crushing device is reversed or stopped. When a fear arises, only a warning is displayed with a warning meaning. Therefore, according to the trends described above, the user carefully monitors the crushing device so that the crushing device can always perform a good crushing operation,
It is difficult to improve productivity.

The present invention has been made in view of the above matters, and an object thereof is to allow a user to closely monitor a crushing device so that the crushing device can always perform a good crushing operation.
It is to provide a self-propelled crusher capable of improving productivity.

[0012]

(1) In order to achieve the above object, a self-propelled crusher of the present invention comprises a frame, a traveling means provided on the frame, and one side in the longitudinal direction of the frame. A crushing device provided, a conveyor extending from a lower position of the crushing device to a position outward in the longitudinal direction of the frame, a pressure sensor for detecting a load pressure of a hydraulic motor driving the crushing device, and a pressure sensor of the pressure sensor. A judgment means for making a predetermined judgment concerning the operating state based on the detected value and a pressure display means for displaying the judgment result of this judgment means are provided.

In the present invention, the pressure sensor detects the load pressure of the hydraulic motor for driving the crushing device, and based on the detected value, the judging means makes a predetermined judgment concerning the operating state, for example, a relatively small value within the normal load range. It is judged whether it is a load or a medium load, or is approaching an overload state to be reversed (reverse rotation). Then, the determination result is displayed by the pressure display means, for example, by turning on an indicator lamp at a position corresponding to each state described above.

Thus, for example, when a display corresponding to a relatively small load or a medium load is continued for a relatively long time, a large object to be crushed or foreign matter is thrown in or an excessive amount of the crushed object is added. It can be confirmed that a good crushing operation can be maintained without inputting the crushed object and without wear or deterioration of the crushing device and other components. Also, if the load shows a tendency to gradually increase over a long period of time, it can be seen that the crushing device and other components are being worn or deteriorated, and if the load suddenly increases, crushing is particularly difficult. It can be seen that a large amount of waste was thrown in, or that the crushing device and other components were greatly worn or deteriorated. In this way, unlike the conventional structure in which an alarm is displayed simply when the crushing device is stopped in the overload state or when it is reversed, the user can perform close monitoring so that the crushing device can always perform a good crushing operation. Therefore, the productivity can be improved.

(2) In order to achieve the above-mentioned object, the self-propelled crusher of the present invention comprises a frame, a traveling means provided on the frame, and a crushing device provided on one side in the longitudinal direction of the frame. , A conveyor extending from a position below the crushing device to a position outward in the longitudinal direction of the frame, a pressure sensor for detecting a load pressure of a hydraulic motor for driving the crushing device, and an operation based on a detection value of the pressure sensor Judgment means for making a predetermined judgment regarding the state, pressure display means for displaying the judgment result of this judgment means, a rotation speed sensor for detecting the rotation speed of the hydraulic motor driving the crushing device, and this rotation speed sensor And a rotation speed display means for displaying the detected value.

In the present invention, the operator can monitor not only the load pressure of the hydraulic motor that drives the crushing device but also the trend of increase and decrease in the rotational speed of the hydraulic motor. As a result, for example, in the stage before reaching the overload state, it is possible to confirm the tendency of excessive input of the crushed object due to the decrease in the number of revolutions and signs such as wear and deterioration of the crushing device and other components, Furthermore, close monitoring can be performed to improve productivity.

(3) In order to achieve the above object, and also in the self-propelled crusher of the present invention, a frame, a traveling means provided on the frame, and a crushing device provided on one side in the longitudinal direction of the frame. , A conveyor extending from a lower position of the crushing device to a position outward in the longitudinal direction of the frame, a pressure sensor for detecting a load pressure of a hydraulic motor for driving the crushing device, and a detection value of the pressure sensor. A reversing control unit for reversing the hydraulic motor driving the crushing device and a reversing number display unit for displaying the number of reversals of the hydraulic motor are provided.

In the present invention, the pressure sensor detects the load pressure of the hydraulic motor for driving the crushing device, and the reversal control means controls the reversal of the hydraulic motor based on the detected load pressure, for example, when it exceeds a predetermined value. Then, the reversal count display means displays the reversal count at that time.

Thus, for example, when the number of inversions is small or is 0 and has not increased for a relatively long time,
Good crushing operation can be maintained without inputting large crushable objects or foreign substances that are difficult to crush or an excessive amount of crushable objects, and without causing wear or deterioration of the crushing device and other components. Can be confirmed. If the number of inversions suddenly increases in a relatively short time, the load is not reduced even if the inversions are repeated. It can be seen that a large amount of wear and deterioration has occurred. In this way, unlike the conventional structure in which an alarm is displayed simply when the crushing device is stopped in the overload state or when it is reversed, the user can perform close monitoring so that the crushing device can always perform a good crushing operation. Therefore, the productivity can be improved.

(4) In the above item (3), preferably,
An inversion number clearing unit that clears the inversion number displayed by the inversion number display unit according to the elapsed time after the inversion control unit finally performs the inversion control is provided.

Thus, for example, when the overload state is eliminated by one or several inversions and the normal crushing state is restored, the number of inversions is cleared to allow the user to monitor and judge the crushing operation. Can be made easier.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a self-propelled crusher of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the overall structure of an embodiment of the self-propelled crusher of the present invention, and FIG. 2 is a front view seen from the direction A in FIG. 1 and 2, 1 is a self-propelled crusher,
2 is a hopper into which crushed objects (for example, construction waste materials, home appliances, plastic waste materials, old tires, etc.) are loaded by a heavy machine such as a hydraulic excavator equipped with a grapple, etc.
A shearing type crushing device (a biaxial shredder in this example) that shears the crushed object received in the hopper 2, crushes it into a predetermined size, and discharges the crushed object downward 4 is equipped with the hopper 2 and the crushing device 3. The crusher main body 5 is a traveling body provided below the crusher main body 4, and 6 is a rear side of the self-propelled crusher 1 that receives the crushed material crushed by the crusher 3 and discharged downward. 1 (the right side in FIG. 1 and the back side of the paper in FIG. 2) to convey and carry out, 7 is provided above the conveyor 6, and the magnetic substance (reinforcing bar, etc.) contained in the crushed substance being conveyed on the conveyer 6 Is a magnetic separator, 8 is a power unit.

The hopper 2 is a hopper having an upward diameter-enlarging shape for receiving an object to be crushed, and is arranged above the crushing device 3. The hopper 2 is provided with the crushing device 3
It is detachably attached to the upper part of the housing 3a by, for example, bolts and nuts.

The crushing device 3 is mounted on an end portion of the main frame crushing device mounting portion 5Aa, which will be described later, on the front side of the self-propelled crusher 1 (left side in FIG. 1, front side in FIG. 2). The crushing device 3 is a two-axis shearing machine (so-called shredder, shearing type crushing device), and two rotary shafts (not shown) in which cutters (rotating teeth) 3c are attached at predetermined intervals in a comb-like shape via a spacer 3b. ) Are arranged substantially parallel to each other and the cutters 3c are alternately engaged with each other. Then, by rotating the rotating shafts in opposite directions, the crushed material supplied from the hopper 2 is caught between the cutters 3c, 3c and sheared so as to be cut into strips, and a predetermined amount is obtained. It is designed to be crushed to the size of.
At this time, the driving force applied to the rotary shaft is on the rear side of the crushing device 3 on the main body frame crushing device mounting portion 5Aa (that is, the main body frame crushing device mounting portion 5Aa described later).
The driving force from the crusher hydraulic motor 10 in the drive device 9 provided in the self-propelled crusher 1 in the front-rear direction) is distributed to each rotary shaft by a gear mechanism (not shown).

The traveling body 5 includes a main body frame 5A and a traveling device 5B as traveling means. The main body frame 5A is formed of, for example, a substantially rectangular frame, and has a crushing device mounting portion 5Aa on which the crushing device 3, the hopper 2, the power unit 8 and the like are mounted, the crushing device mounting portion 5Aa and the left side. The track frame portion 5Ab connecting to the right traveling device 5B. Further, the traveling device 5B includes a driving wheel 11, a driven wheel (idler) 12, and a crawler belt (trackless crawler belt) 13 spanned between these, and is provided on the driving wheel 11 side. Left / right traveling hydraulic motor 14L,
The self-propelled crusher 1 is made to travel by being given a driving force by 14R (see FIG. 3 described later).

The conveyor 6 has a discharge side (the rear side of the self-propelled crusher 1; the right side in FIG. 1) portion which is attached to the arm member 15 provided so as to project from the power unit 8.
It is suspended and supported via 6a and 16b. The portion of the conveyor 6 opposite to the discharge side (the front side of the self-propelled crusher 1; the left side in FIG. 1) is located below the main body frame crusher attachment portion 5Aa, and the support member 17 is interposed therebetween. It is supported so as to be suspended from the crushing device mounting portion 5Aa. As a result, the conveyor 6 passes from below the main body frame crushing device mounting portion 5Aa to below the power unit 8 to reach the main body frame portion 5A.
The self-propelled crusher 1 of A is arranged at an outer side of the rear side with an upward slope.

Reference numeral 18 is a frame, 19 is a drive wheel supported by the frame 18, and 20 is a drive wheel 1
A conveyor hydraulic motor (not shown in FIGS. 1 and 2; see FIG. 3, which will be described later) for driving 9 is provided between the drive wheel 20 and a driven wheel (not shown). The conveyor belt 22 is a roller for supporting the conveying surface of the conveyor belt 21. At this time, 23 is a well-known tension adjusting mechanism capable of displacing a bearing mechanism (not shown) that supports the rotation shaft of the driven wheel in a substantially horizontal direction, whereby the tension of the conveyor belt 21 can be adjusted. Has become.

Reference numeral 24 denotes a crushed material chute provided below the crushing apparatus 3 for guiding the crushed material generated by the crushing processing by the crushing apparatus 3 downward. The conveyor 6 is configured to convey and discharge the crushed material led out from the crushed material chute 24 by circulatingly driving the conveyor belt 21.

The magnetic separator 7 is supported by being suspended from the arm member 15 via a support member 25, and is arranged above the conveyor belt 21 so as to be substantially orthogonal thereto, and a magnetic separator belt 26 (not shown). A magnetic force generating means and a magnetic motor 27 for a magnetic separator for driving the magnetic separator belt 26 are provided. In the magnetic separator 7, the magnetic separator belt 26 is driven around the magnetic force generating means (not shown) by the magnetic motor 27 for the magnetic separator so that the magnetic force from the magnetic force generating means acts on the magnetic separator belt 26. After adsorbing the magnetic substance to the magnetic separator belt 26, the magnetic substance is conveyed in a direction substantially orthogonal to the conveyor belt 21, and the conveyor 6 side is passed through a magnetic substance chute 28 provided in the frame 18 of the conveyer 6. It is designed to drop toward you.

The power unit 8 is mounted on the upper portion of the rear side end of the self-propelled crusher 1 of the main body frame crusher attachment 5Aa via a power unit loading member 29. The power unit 8 includes the left and right traveling hydraulic motors 14L and 14R (see FIG. 3, which will be described later), the crushing device hydraulic motor 10, and the conveyor hydraulic motor 20.
(See FIG. 3, which will be described later), and first and second hydraulic pumps 30A and 30B (see FIG. 3, which will be described later) that discharge pressure oil to a hydraulic actuator such as the magnetic motor 27 for magnetic separator, and an auxiliary hydraulic pump (pilot pump). ) 31 (see FIG. 3 described later)
And an engine 32 as a prime mover for driving these hydraulic pumps 30A, 30B, and 31 (see FIG. 3 described later).
And a plurality of control valves 33, 34 for controlling the flow of pressure oil supplied from the hydraulic pumps 30A, 30B, 31 to the hydraulic actuators 14L, 14R, 10, 20, 27, respectively (see FIG. 3, which will be described later). ) And two-position switching valves 35 to 37 (see FIG. 3, which will be described later), and the like.

Returning to FIG. 1, a driver's seat 38 for an operator to ride is provided in front of the self-propelled crusher 1 of the power unit 8 (left side in FIG. 1, front side in FIG. 2). By standing on the driver's seat 38, the operator can monitor the crushing state by the crushing device 3 to some extent during the crushing work.

Signal indicator lights 39, 39 are provided upright at the left and right ends of the power unit 8 on the rear side of the self-propelled crusher 1. As shown in FIGS. 1 and 2,
For example, it is installed at a position higher than the hopper 2, the handrail 40a of the inspection step 40, and the like so that it can be easily seen by an operator such as a hydraulic excavator who is loading the crushed material into the hopper 2.

The signal indicator lamp 39 includes, for example, three display portions (upper display portion 39a, middle display portion 39b, lower display portion 39).
c) and is divided into easy-to-see colors such as red, yellow, and green, and the above-mentioned display unit according to the detection result of the pressure sensor 70, which will be described later, is lit and displayed (details will be described later).

Here, the crushing device 3, the traveling body 5, the conveyor 6 and the magnetic separator 7 constitute a driven member driven by a hydraulic drive device provided in the self-propelled crusher 1. The detailed configuration of the hydraulic drive system will be described below with reference to FIG. FIG. 3 is a hydraulic circuit diagram showing the overall configuration of a hydraulic drive system in an embodiment of the self-propelled crusher of the present invention.

In FIG. 3, as described above, 32 is an engine, 30A and 30B are first and second variable displacement hydraulic pumps driven by the engine 32, and 31 is similarly driven by the engine 32. Fixed capacity pilot pump, 10, 14L, 14R,
Reference numerals 20 and 27 denote hydraulic motors for a crushing device, hydraulic motors for left traveling, right traveling hydraulic motors, to which hydraulic oil discharged from the first and second hydraulic pumps 30A and 30B are supplied,
Hydraulic motor for conveyor, hydraulic motor for magnetic separator, 3
3, 34L, 34R, 35, 36 respectively indicate the flow (direction and flow rate) of pressure oil supplied from the first and second hydraulic pumps 30A, 30B to the hydraulic motors 10, 14L, 14R, 20, 27, respectively. These are the control valve for the crushing device, the control valve for left traveling, the control valve for right traveling, the valve for conveyor, and the valve for magnetic separator that control each. Reference numeral 37 is a travel lock solenoid valve, 41 and 42 are provided in the driver's seat 38 (see FIGS. 1 and 2), and the left travel control valve 34L is provided.
And a left / right traveling operation lever device for switching the right and right traveling control valves 34R respectively, 43
Is provided in the crusher main body 4 (for example, in the driver's seat 38), and is used by the operator to input and operate the crushing device 3, the conveyor 6, and the magnetic separator 7 for starting and stopping. The operation panel 44 is a controller including a drive signal generator 44a and a load display controller 44b.

The first and second hydraulic pumps 30A, 3
0B and the discharge line 45A of the pilot pump 31,
Relief valves 47A, 47B and 48 are provided in the pipe lines 45Aa, 45Ba and 46a branched from 45B and 46, respectively, and the first and second hydraulic pumps 30A,
The value of the relief pressure for limiting the maximum value of the discharge pressure of 30B and the pilot pump 31 is set by the urging force of the springs 47Aa, 47Ba and 48a provided respectively.

The left traveling control valve 34L connected to the left traveling hydraulic motor 14L is a hydraulic pilot type three-position switching valve capable of controlling the direction and flow rate of pressure oil to the left traveling hydraulic motor 14L. The crusher control valve 33 connected to the crusher hydraulic motor 10 includes the crusher hydraulic motor 1
It is a 3-position electromagnetic switching valve that can control the direction and flow rate of pressure oil to zero.

These left traveling control valves 34L
The control valve 33 for the crushing device has the first
The pressure oil discharged from the hydraulic pump 30A is introduced, and the pressure oil is supplied to the left traveling hydraulic motor 14L and the crushing device hydraulic motor 10. These control valves 33 and 34L are, in the center bypass line 45Ab connected to the discharge conduit 45A of the first hydraulic pump 30A, from the upstream side of the left traveling control valve 34L and the crushing device control valve 33. They are arranged in order.

Left-hand running control valve 34L
Is the left traveling operation lever device 41 which is generated by the pilot pump 31 and includes the left traveling operation lever 41a.
It is operated by the pilot pressure reduced to a predetermined pressure. That is, the left traveling operation lever device 41 includes the left traveling operation lever 41a and a pair of pressure reducing valves 41b and 41b that output a pilot pressure according to the operation amount thereof. The left traveling operation lever 41a of the left traveling operation lever device 41 is moved in the direction B in FIG. 3 (or the opposite direction,
When the following operation is performed in parentheses, the pilot pressure is transmitted via the pilot conduit 51a (or 51b) to the drive unit 34La of the left travel control valve 34L.
(Or 34Lb), which causes the left traveling control valve 34L to move to the upper switching position 34 in FIG.
Switched to LA (or lower switching position 34LB),
The pressure oil from the first hydraulic pump 30A is transferred to the discharge pipe line 4
5A, the center bypass line 45Ab, the switching position 34LA (or the lower switching position 34LB) of the left traveling control valve 34L, and the forward rotation side pressure oil supply pipeline 49a (or the reverse rotation side pressure oil supply pipeline 49b). Is supplied to the left traveling hydraulic motor 14L via the left traveling hydraulic motor 14L, and the left traveling hydraulic motor 14L is driven in the forward direction (or reverse direction).

When the left traveling operation lever 41a is set to the neutral position shown in FIG. 3, the left traveling control valve 34L is moved by the urging force of the springs 34Lc and 34Ld.
After returning to the neutral position 34LC shown in, the left traveling hydraulic motor 14L is stopped.

The traveling lock solenoid valve 37 is connected to the discharge pipe line 46 of the pilot pump 31. The travel lock solenoid valve 37 is switched by a drive signal St generated by the drive signal generator 44a of the controller 44 and output (details will be described later). That is, when the drive signal St input to the solenoid 37a is turned on, the travel lock solenoid valve 37 has the communication position 3 on the left side in FIG.
7A, the pilot pressure introduced through the conduit 46b branched from the discharge conduit 46 of the pilot pump 31 is guided to the left and right traveling operation lever devices 41, 42 through the introduction conduit 50, and the above-described operation is performed. It is possible to operate the left travel control valve 34L by the left travel operation lever 41a and operate the right travel control valve 34R by the right travel operation lever 42a described later. On the other hand, when the drive signal St is turned off, the traveling lock solenoid valve 37 is returned to the shut-off position 37B on the right side in FIG. 3 by the restoring force of the spring 37b, and shuts off the pipeline 46b and the introduction pipeline 50. At the same time, the introduction line 50 is communicated with the tank line 52 connected to the tank 51, and the pressure in the introduction line 50 is used as the tank pressure. As a result,
The left / right traveling control levers 41, 42 cannot operate the left / right traveling control valves 34L, 34R.

Control valve 33 for the crushing device
Is the drive signal generator 44a of the controller 44.
It is configured to be switched by the forward rotation drive signal Scr1 or the reverse rotation drive signal Scr2 output by the above. That is, when the forward rotation drive signal Scr1 is turned on and the reverse rotation drive signal Scr2 is turned off to the solenoid drive parts 33a and 33b of the crusher control valve 33, the crusher control valve 33 shown in FIG. It is switched to the middle upper switching position 33A. As a result, the pressure oil from the first hydraulic pump 30A causes the discharge conduit 45A, the center bypass line 45Ab, and the neutral position 34L of the left travel control valve 34L.
C, the switching position 33A of the crusher control valve 33, and the forward rotation side pressure oil supply pipe 53a are supplied to the crusher hydraulic motor 10, and the crusher hydraulic motor 10 is driven in the forward direction. To be done.

At this time, the forward rotation side pressure oil supply line 5
A pressure sensor 55 is connected to a pressure guiding pipe 54 branched from 3a. The pressure sensor 55 detects the load pressure (supply pressure) of the crusher hydraulic motor 10 and outputs it as a load pressure signal Pcr to the drive signal generator 44a and the load display controller 44b ( Details will be described later).

Further, when the forward drive signal Scr1 is turned off and the reverse drive signal Scr2 is turned on, the solenoid drive parts 33a and 33b of the crusher control valve 33 are turned on.
3 is input to the crushing device control valve 33, the crushing device control valve 33 is switched to the lower switching position 33B in FIG. As a result, the pressure oil from the first hydraulic pump 30A is transferred to the switching position 33B and the reverse rotation side pressure oil supply line 5
It is supplied to the crusher hydraulic motor 10 via 3b, and the crusher hydraulic motor 10 is driven in the reverse direction.

The forward and reverse drive signals Scr1,
When both Scr2 are turned off, the crusher control valve 33 is restored by the restoring force of the springs 33c and 33d.
Returning to the neutral position 33C shown in FIG.
The pressure oil from 0A is shut off, and the crushing device hydraulic motor 10 is stopped.

Control valve 34R for the right traveling
Is the same as the left traveling control valve 34L,
It is a hydraulic pilot type three-position switching valve capable of controlling the direction and flow rate of pressure oil to the right traveling hydraulic motor 14R. The conveyor valve 35 and the magnetic separator valve 36 are the conveyor hydraulic motor 20. And a two-position electromagnetic switching valve capable of controlling the direction and flow rate of the pressure oil to the magnetic motor 27 for the magnetic separator.

The right traveling control valve 34R,
The conveyor valve 35 and the magnetic separator valve 3
6 supplies the pressure oil discharged from the second hydraulic pump 30B to the right traveling hydraulic motor 14R, the conveyor hydraulic motor 20 and the magnetic separator hydraulic motor 27, respectively.

Control valve 34R for the right traveling
Is arranged in a center bypass line 45Bb connected to the discharge conduit 45B of the second hydraulic pump 30B. A diversion valve 56 is connected to the downstream side of the center bypass line 45Bb.

Although not described in detail, the flow dividing valve 56 is a known flow dividing valve having a pressure compensating function and is known as this type. The flow dividing valve 56 includes the conveyor hydraulic motor 20 and the magnetic separator hydraulic motor 27. Irrespective of the load pressure of, for example, always (amount of pressure oil supplied to the conveyor hydraulic motor 20): (amount of pressure oil supplied to the magnetic motor 27 for magnetic separator) =
The pressure oil from the second hydraulic pump 30B is supplied to the conveyor hydraulic motor 20 via the conveyor valve 35, the conduit 57, and the pressure oil supply conduit 57a branched from the conduit 57 so that the ratio becomes 2: 1. And the magnetic separator valve 36,
It is adapted to be distributed and supplied to the magnetic motor 27 for a magnetic separator via a pipe 58 and a pressure oil supply pipe 58a branched from the pipe 58.

From the viewpoint of circuit protection, relief valves 59 and 60 are provided in the conduits 57b and 58b branched from the conduits 57 and 58 of the conveyor valve 35 and the magnetic separator valve 36, respectively. The value of the relief pressure for limiting the maximum supply pressure of the hydraulic motor 20 for the conveyor and the hydraulic motor 27 for the magnetic separator is set by the urging force of the springs 59a and 60a provided for each. ing.

Control valve 34R for the right traveling
Is operated by the pilot pressure of the right travel operation lever device 42 in the same manner as the left travel control valve 34L described above, and the right travel operation lever 42a is moved in the direction C in FIG. If the pilot pressure is set to the pilot line 61a (or 6),
1b) through the control valve 34R for right driving
Is guided to the drive unit 34Ra (or 34Rb) of the vehicle, and thereby the right traveling control valve 34R is switched to the upper switching position 34RA (or the lower switching position 34RB) in FIG.
Is switched to. Thereby, the second hydraulic pump 3
The pressure oil from 0B is supplied to the right traveling hydraulic motor 14R through the switching position 34RA (or the lower switching position 34RB) and the forward rotation side pressure oil supply pipe line 62a (or the reverse rotation side pressure oil supply pipe line 62b). And is driven in the forward direction (or reverse direction). When the right traveling operation lever 42a is set to the neutral position shown in FIG. 3, the right traveling control valve 34R is formed.
Is returned to the neutral position 34RC shown in FIG. 3 by the urging force of the springs 34Rc and 34Rd, and the right traveling hydraulic motor 14R is stopped.

The pilot pressure applied to the right traveling operation lever device 42 is the same as the left traveling operation lever device 4 described above.
As in the case of No. 1, it is supplied from the pilot pump 31 via the travel lock solenoid valve 37. Therefore, when the drive signal St input to the solenoid 37a of the travel lock solenoid valve 37 is turned on, the right travel control valve 34R can be operated by the right travel operation lever device 42,
When the drive signal St is turned off, the operation of the right travel control valve 34R by the right travel operation lever device 42 becomes impossible.

The conveyor valve 35 is an electromagnetic switching valve having a solenoid drive section 35a. The solenoid drive unit 35a is provided with a solenoid driven by the drive signal Scon from the drive signal generation unit 44a of the controller 44, and the conveyor valve 35 is provided.
Are switched according to the input of the drive signal Scon. That is, when the drive signal Scon becomes an ON signal corresponding to the operation of the conveyor 6, the conveyor valve 35 is switched to the upper switching position 35A in FIG. As a result, the pressure oil from the second hydraulic pump 30B guided via the neutral position 34RC of the right travel control valve 34R and the flow dividing valve 56 is
It is supplied to the conveyor hydraulic motor 20 from the switching position 35A through the conduit 57 and the pressure oil supply conduit 57a, and the conveyor hydraulic motor 20 is driven.
The return oil at this time passes through the discharge pipeline 64 connected to the tank pipeline 63 and the tank pipeline 63, and then returns to the tank 51.
Return to. When the drive signal Scon becomes an OFF signal corresponding to the stop of the conveyor 6, the conveyor valve 35 is urged by the spring 35b to cause the shut-off position 35B shown in FIG.
Then, the conveyor hydraulic motor 20 is stopped.

Similar to the conveyor valve 35, the magnetic selector valve 36 has a solenoid driving portion 36a provided with a solenoid driven by a driving signal Sm from the driving signal generating portion 44a of the controller 44.
This drive signal Sm is ON corresponding to the operation of the magnetic separator 7.
When the signal comes, the magnetic separator valve 36 is switched to the communication position 36A on the upper side in FIG. 3, and the second hydraulic pump 3
The pressure oil from 0B is used for the right-hand control valve 3
4R neutral position 34RC, the diversion valve 56, the magnetic selector valve switching position 36A, the conduit 58 and the pressure oil supply conduit 58a are supplied to the magnetic separator hydraulic motor 27, and the magnetic separator hydraulic pressure is supplied. The motor 27 is driven. The return oil returns to the tank 51 via the discharge pipeline 65 connected to the tank pipeline 63 and the tank pipeline 63. When the drive signal Sm becomes an OFF signal corresponding to the stop of the magnetic separator 7, the magnetic selector valve 36 returns to the shutoff position 36B shown in FIG. 3 by the urging force of the spring 36b, and the magnetic selector hydraulic motor 27. Will stop.

FIG. 4 is a front view showing a panel surface of the operation panel 43 which constitutes an embodiment of the self-propelled crusher of the present invention. On the operation panel 43, a "shredder forward rotation" button 66a, a "shredder stop" button 66b for driving the crushing device 3 in the normal rotation, stop, and reverse rotation directions, respectively,
"Shredder reverse rotation" button 66c and "conveyor start" button 67 for starting and stopping the conveyor 6
a, "Conveyor stop" button 67b, "Magnet separator start" button 68a, "Magnet separator stop" button 68b for starting / stopping the magnetic separator 7, a traveling mode for traveling operation, and a crushing mode for crushing work An operation selection switch 69 for selecting either one of the above, and a meter unit 70 including a fuel gauge and the like.

When the operator operates various buttons and switches on the operation panel 43, the operation signals are input to the drive signal generating section 44a of the controller 44. The drive signal generation unit 44a is based on the operation signal from the operation panel 43, and the conveyor valve 35, the magnetic separator valve 36, the traveling lock solenoid valve 37, the crusher control valve 33 (the solenoid drive unit 33).
a, 33b) to the drive signals Scon, Sm, St, Scr
It generates 1 and Scr2 and outputs them to the corresponding solenoid.

That is, when "travel" is selected by the operation selection switch 69 of the operation panel 43, the drive signal generator 44a turns on the drive signal St to turn on the travel lock solenoid valve 37. input. As a result, the traveling lock solenoid valve 37 is switched to the communication position 37A on the left side in FIG. 3, and the operation levers 41a,
42a, the control valves for traveling 34L, 3
4R operation becomes possible. When “crush” is selected by the operation selection switch 69 of the operation panel 43, the drive signal generation unit 44a sets the drive signal St to O
The FF is input to the traveling lock solenoid valve 37, and the traveling lock solenoid valve 37 returns to the shut-off position 37B on the right side in FIG. As a result, it becomes impossible to operate the traveling control valves 34L and 34R by the left and right traveling operation levers 41a and 42a.

Further, the "shredder forward rotation" button 66a (or the "shredder reverse rotation" button 6 of the operation panel 43 is used.
6c, hereinafter the same in parentheses) is pressed, the drive signal generation unit 44a turns on (or turns off) the normal drive signal Scr1 to the solenoid drive unit 33a of the crusher control valve 33. As well as
The reverse rotation drive signal Scr2 to the solenoid drive unit 33b of the crusher control valve 33 is turned off.
(Or ON), the crushing device control valve 33 is switched to the upper switching position 33A (or the lower switching position 33B) in FIG. 3, and the pressure oil from the first hydraulic pump 30A is transferred to the crushing device hydraulic pressure. The crushing device 3 is supplied to and driven by the motor 10 to start the crushing device 3 in the normal direction (or reverse direction).

Thereafter, the "shredder stop" button 6
When 6b is pressed, the drive signal generator 44a turns off both the forward / reverse rotation drive signals Scr1 and Scr2 to return the crusher control valve 33 to the neutral position 33C shown in FIG. The crushing device hydraulic motor 10 is stopped and the crushing device 3 is stopped.

When the "start conveyor" button 67a on the operation panel 43 is pressed, the drive signal generator 44a turns on the drive signal Scon to the solenoid driver 35a of the conveyor valve 35. And Fig. 3
The communication position 35A on the upper middle side is switched to, the pressure oil from the second hydraulic pump 30B is supplied to and driven by the hydraulic motor 20 for the conveyor, and the conveyor 6 is started. afterwards,
When the "conveyor stop" button 67b is pressed, the drive signal generation unit 44a turns off the drive signal Scon to the solenoid drive unit 35a of the conveyor valve 35 and returns to the cutoff position 35B shown in FIG. Then, the conveyor hydraulic motor 20 is stopped, and the conveyor 6
Is supposed to stop.

Similarly, the "start magnetic separator" button 68a.
When is pressed, the drive signal generation unit 44a switches the magnetic separator valve 36 to the communication position 36A on the upper side in FIG. 3, drives the magnetic separator hydraulic motor 27, and starts the magnetic separator 7. . After that, the "stop magnetic separator" button 6
When 8b is pressed, the drive signal generation unit 44a returns the magnetic selector valve 36 to the shutoff position 36B and stops the magnetic selector 7.

The controller 44 comprises the drive signal generator 44a and the load display controller 44b as described above. As described above, the drive signal generation section 44a generates each drive signal Scon, Sm, St, Scr1, Scr2 based on the operation signal from the operation panel 43 and outputs them to the corresponding solenoid. ing.

FIG. 5 is a flow chart showing the control content of the control of the crushing device 3 among the control functions of the drive signal generating section 44a. The control contents of the drive signal generator 44a will be described below with reference to FIG. In FIG.
The "shredder forward rotation" button 66a of the operation panel 43
When is pressed, the drive signal generator 44a starts this flow. First, in step 10, a flag for identifying whether or not the crusher hydraulic motor 10 is in an overloaded state, a time calculator T for counting the duration of the overloaded state, and the duration of the reverse operation are counted. Each time calculator T'for clearing is cleared to 0.

Next, at step 20, it is judged whether or not the stop of the crushing device 3 is instructed. Specifically, the “shredder stop” button 6 on the operation panel 43
It is determined whether 6b is pressed. If the "shredder stop" button 66b has been pressed, this determination is satisfied, and the routine moves to step 160 to immediately stop the crushing device 3. If the "shredder stop" button 66b is not pressed, this determination is not satisfied, and the routine goes to Step 30.

In step 30, it is judged whether or not the flag is 1, which indicates the overload state of the crushing hydraulic motor 10 described above. If it is overloaded, the flag is 1
Therefore, the determination (described later) is satisfied, and therefore, the hydraulic motor 10 for the crushing device is immediately driven in the reverse rotation direction by moving to step 110 described below. If it is not overloaded, the flag is 0, so this determination is not satisfied, and the routine goes to Step 40.

In step 40, the crusher hydraulic motor 10 is driven in the normal direction. That is, the forward rotation drive signal Scr1 output to the crusher control valve 33 is turned on, and the reverse rotation drive signal Scr2 is turned on.
Is turned off, and the control valve 33 for the crushing device
To the switching position 33A, and the first hydraulic pump 30
The pressure oil from A is supplied to the crushing device hydraulic motor 10 via the forward rotation side pressure oil supply conduit 53a to drive in the forward rotation direction.

After that, the routine proceeds to step 50, where the load pressure signal Pcr detected and output by the pressure sensor 55 provided through the pressure guiding pipe 54 in the forward rotation side pressure oil supply conduit 53a is inputted,
In order to judge whether it is an overload condition that should be reversed,
This load pressure signal Pcr is predetermined and the controller 4
It is determined whether or not it is larger than the threshold value P ₁₁ stored in an appropriate portion of 4 (or may be set and input by an appropriate external input means). When the load pressure signal Pcr is less than or equal to the threshold value P ₁₁ , the determination is not satisfied and it is considered that the crusher hydraulic motor 10 is not in a high load state, and the time calculator T is cleared to 0 in step 60. Then, return to step 20. If the load pressure Pcr of the crusher hydraulic motor 10 is greater than the threshold value P ₁₁ , the determination is satisfied and the crusher hydraulic motor 10 is considered to be in a high load state, and the time is determined in step 70. After adding 1 to the calculator T, the process proceeds to step 80.

In step 80, it is judged whether the time calculator T is larger than a threshold value T _{11 which} will be described later.
If the time calculator T is less than or equal to the threshold value T ₁₁ , the determination is not satisfied, and the process returns to step 20 and step 20
~ Step 50 → Step 70 ~ Step 80 are repeated. During this repetition, when the hydraulic motor 10 for the crushing device is not in the high load state and the load pressure signal Pcr becomes the threshold value P ₁₁ or less, the process proceeds from step 50 to step 60, and the time calculator T is again activated. It is cleared to 0. On the other hand, during the repetition, when the load pressure signal Pcr continues to be higher than the threshold value P ₁₁ and the time calculator T becomes larger than the threshold value T ₁₁ , the determination at step 80 is satisfied and the crushing device is satisfied. The hydraulic motor 10 for use is considered to be in an overloaded state, and the routine proceeds to step 90. In addition,
The threshold value T ₁₁ is determined by the hydraulic motor 10 for the crushing device.
In order to determine whether the overload state is transient / temporary or continuous, it is a predetermined value stored in advance (or may be set and input by an appropriate external input means). Good).

In step 90, the time calculator T is set to 0.
To clear. Then, in step 100, the flag is set to 1 indicating that it is in an overloaded state, and the process proceeds to step 110.

In step 110, the crusher hydraulic motor 10 is driven in the reverse direction. That is, the forward rotation drive signal Scr1 output to the crusher control valve 33 is turned off, and the reverse rotation drive signal Scr2 is turned off.
Is turned on, the control valve 33 for the crushing device is switched to the switching position 33B, and the first hydraulic pump 30A is turned on.
The pressure oil is supplied to the crusher hydraulic motor 10 through the reverse pressure oil supply pipe 53b and is driven in the reverse direction.

Then, the process proceeds to step 120, and the time
After adding 1 to the calculator T ′, the process proceeds to step 130.
In step 130, the time calculator T'will be described later.
Threshold T₁₂Determine if greater than. The time
The calculator T'is the threshold value T ₁₂If less than
Condition is not satisfied, the process returns to step 20 and starts from step 20.
Repeat step 130. However, at this time, the flag
Is 1, which indicates an overload condition,
20 to step 30 → step 110 to step 130
Will be repeated. While repeating this
Calculator T'is threshold T₁₂When it gets bigger,
The judgment of step 130 is satisfied, and the crushing device 3 is sufficient.
It is considered that it has been reversed for a certain amount of time, and it moves to step 140.
It

In step 140, the time calculator T '
Is cleared to 0, and then the process proceeds to step 150 to clear the flag to 0 which is not an overload condition, and the process returns to step 20. After that, the same procedure is repeated. The threshold value T ₁₂ described above is determined by the cutters 3c, 3c in the crushing device 3.
The cutters 3c and 3 can be used to remove crushed objects, foreign matter, etc.
The time sufficient to escape from the interval c is a predetermined value stored in advance (or may be set and input by an appropriate external input means).

The load display control section 44b is provided with the hydraulic motor 1 for the crushing device which is input from the pressure sensor 55.
Based on the load pressure signal Pcr of 0, the display control signal Sp is output to the signal indicator lamp 39.

FIG. 6 is a flow showing the control contents of the load display control section 44b. The control contents of the load display controller 44b will be described below with reference to FIG. In FIG. 6, the load display control unit 44b first executes step 21.
At 0, it is determined whether or not the stop of the crushing device 3 is instructed. That is, as described above in the description of FIG. 5, the “shredder stop” button 6 on the operation panel 43.
It is determined whether 6b is pressed. If the "shredder stop" button 66b is pressed, this determination is satisfied, and the routine goes to Step 290, where all the display portions of the signal indicator lamp 39 are turned off. The "shredder stop" button 66b
If is not pressed, this determination is not satisfied, and the routine goes to Step 220.

In step 220, the crushing device 3 (that is, the crushing device hydraulic drive motor 10, and so on).
Is being driven in reverse (specifically, it is determined whether step 110 in the flow of FIG. 5 described above is being executed). If the crushing device 3 is being driven in the reverse direction, the determination is satisfied, and the routine proceeds to step 280, where the display control signal Sp for turning on the upper display portion 39a of the signal indicator lamp 39 is immediately outputted. If the crushing device 3 is in the normal rotation drive, the determination is not satisfied, and the routine goes to Step 230.

In step 230, the pressure sensor 55
The load pressure signal Pcr of the hydraulic motor 10 for the crushing device, which is detected and output by, is input. Then in step 240,
It is determined whether or not this load pressure signal Pcr is larger than a threshold value P ₁₂ described later. When the load pressure signal Pcr is equal to or less than the threshold value P _{12, the process} proceeds to step 250, and the display control signal Sp for lighting the lower display portion 39c of the signal indicator lamp 39 is output. On the other hand, when the load pressure signal Pcr is larger than the threshold value P ₁₂ , the determination is satisfied, and the routine goes to Step 260.

At step 260, the load pressure signal Pcr is obtained.
Is greater than the threshold P ₁₁ is further determined. If the load pressure signal Pcr is less than or equal to the threshold value P _{11, the process} proceeds to step 270, and the display control signal Sp for lighting the middle display portion 39b of the signal indicator lamp 39 is output.
On the other hand, when the load pressure signal Pcr is larger than the threshold value P ₁₁ , the determination is satisfied, and the routine goes to step 280, where the display control signal Sp for lighting the upper display portion 39a of the signal indicator lamp 39 is outputted.

In this way, in step 250, step 270, or step 280, the signal indicator lamp 39 corresponding to the load pressure state of the hydraulic motor 10 for the crushing device.
After turning on the display portion 39a, 39b, or 39c of, the process returns to step 10 and the same procedure is repeated.

The threshold value P ₁₂ is smaller than the threshold value P ₁₁ described above, and the signal indicating lamp 39
When the load pressure Pcr is divided into three stages in order to light the three display portions 39a, 39b, 39c of, the threshold value P ₁₁ as the threshold value on the high pressure side is separated from the load pressure Pcr on the low pressure side. It is predetermined as a threshold value and stored in an appropriate portion in the controller 44 (or may be set and input by an appropriate external input means). That is, it is for determining whether the operating state of the crusher hydraulic motor 10 is a relatively small load or a medium load within the normal load range.

In the above, the main body frame 5A constitutes the frame described in each claim, and the traveling device 5B
Is a traveling means provided on the frame, the crushing device hydraulic motor 10 is a hydraulic motor for driving the crushing device, and the load display control unit 44b determines a predetermined operation state based on the detected value of the pressure sensor. And a signal display lamp 39, an upper display section 39a, and a middle display section 39.
b and the lower display section 39c constitute pressure display means for displaying the determination result.

Next, the operation and action of one embodiment of the self-propelled crusher of the present invention will be described below. (1) At the time of crushing work In the self-propelled crusher 1 having the above configuration, at the time of crushing work,
After the operator selects "crush" with the operation selection switch 69 of the operation panel 43 to disable the traveling operation, the "magnetic separator start" button 68a, the "conveyor start" button 67a, and the "shredder forward rotation" are selected. The buttons 66a are sequentially pressed.

By the above operation, the drive signal generator 44a of the controller 44 turns on the drive signal Sm to the solenoid driver 36a of the magnetic selector valve 36,
The magnetic separator valve 36 is switched to the communication position 36A on the upper side in FIG. Similarly, the drive signal generation unit 44a turns on the drive signal Scon to the solenoid drive unit 35a of the conveyor valve 35, so that the conveyor valve 35
Switches to the upper communication position 35A in FIG. further,
The drive signal generation unit 44a outputs the drive signal Scr1 to the solenoid drive unit 33a of the crusher control valve 33 to the O level.
N, OF drive signal Scr2 to solenoid drive unit 33b
Control valve for crushing device 3 by setting to F
3 is switched to the upper switching position 33A in FIG. As a result, the pressure oil from the second hydraulic pump 30B is supplied to the magnetic motor for magnetic separator 27 and the hydraulic motor for conveyor 20,
While the magnetic separator 7 and the conveyor 6 are activated, the pressure oil from the first hydraulic pump 30A is supplied to the crushing device hydraulic motor 10, and the crushing device 3 is activated in the forward direction.

At this time, as shown in FIG.
Is in the normal rotation drive, so steps 210 and 2
The determination of 20 is not satisfied, and the routine proceeds to step 240 via step 230, and it is determined whether or not the load pressure Pcr is larger than the threshold value P ₁₂ . However, since the material to be crushed has not yet been put into the hopper 2 and the load on the crushing device 3 has not been applied, the load pressure Pcr is smaller than the threshold value P ₁₂ , so that the process proceeds to step 250 and the signal indicator lamp 39 is turned on. Display 3
9c lights up.

That is, at this time, if the crushing device 3 is normal, the lower display portion 39c should be lit up.
If the middle display portion 39b or the upper display portion 39a is lit up, a relatively large load that should not occur originally is applied to the crushing device 3, so that the crushing device 3 or other self-propelled devices are operated. It is conceivable that abnormalities such as wear and deterioration have occurred in the components of the crusher 1. In this way, by confirming the signal indicator lamp 39 in the idling state of the crushing device 3 before the crushed object is charged, it is possible to confirm normality / abnormality. Note that this state is set in step 20 in the control flow of the drive signal generation unit 44a shown in FIG.
Is a state in which step 60 is repeated.

Next, for example, when the object to be crushed is put into the hopper 2 by the hydraulic excavator equipped with the above-mentioned grapple or the like, the inputted object to be crushed is guided to the crushing device 3,
It is crushed into a predetermined size by the crushing device 3. At this time, if the object to be crushed is not crushed and the amount of the crushed substance is relatively small, the load pressure Pcr of the crusher hydraulic motor 10 is relatively small, and Pcr ≦ P ₁₂
Since the determination in step 240 is not satisfied in the flow of FIG. 6 described above, the lower display portion 39c of the signal indicator lamp 39 is lit and displayed. Note that this state is also a state in which steps 20 to 60 in FIG. 6 are repeated, as in the above-described idle operation.

On the other hand, similarly to the above, if there is no crushable object to be crushed, but the input amount is relatively medium, the load pressure Pcr of the crusher hydraulic motor 10 is equal to the threshold values P ₁₁ , P.
P ₁₂ <Pcr ≦ P ₁₁ which is between ₁₂ and the determination of step 240 in FIG. 6 is satisfied, but step 260
Is not satisfied, the process moves to step 270. That is, the middle display section 39b of the signal display lamp 39 is lit and displayed.
Even in this state, step 20 in FIG.
Is a state in which step 60 is repeated.

On the other hand, when the material to be crushed is difficult to crush or the amount of charge is relatively large, the load pressure Pcr of the crusher hydraulic motor 10 is set to the threshold values P ₁₁ and P _12.
Therefore, the determination at Step 260 in FIG. 6 is satisfied, and the routine goes to Step 280. As a result, the upper display portion 39a of the signal indicator lamp 39 lights up. That is,
In this example, which of the upper display portion 39a and the middle display portion 39b of the signal indicator light 39 is displayed is made to coincide with whether or not the crushing device 3 is driven in reverse.

At this time, step 50 in FIG.
Is satisfied, the process proceeds to step 110 through step 90 and step 100, and the forward rotation drive signal Scr1 output to the crusher control valve 33 is turned off and the reverse drive signal Scr2 is turned on to drive the crusher 3 in reverse.
When the crushing device 3 starts the reverse rotation drive, the load pressure detection value Pcr of the pressure sensor 55 in the normal rotation drive direction decreases, but in FIG. 6, the determination is satisfied in step 220 and the process directly moves to step 280 during reverse rotation drive. , The upper display portion 39a keeps lighting. Note that this state corresponds to step 2 in FIG.
In this state, 0 to step 30 → step 110 to step 130 are repeated.

The reverse drive time calculator T'is the threshold value T.
_After counting up to ₁₂ , the determination in step 130 is satisfied in FIG. 5, and the process returns to step 20 via steps 140 and 150. Since the flag is reset to 0, the determination in step 30 is not satisfied and step 40
Move on to. That is, the drive signal generator 44a outputs the normal drive signal Scr to the crusher control valve 33.
Crushing device 3 when 1 is turned on and reverse rotation drive signal Scr2 is turned off
To normal drive. As a result, the determination in step 220 in FIG. 6 is no longer satisfied, so the load display control unit 44b inputs the current load pressure Pcr again in step 230 and repeats the operations from step 240 onward.

As described above, the object to be crushed is crushed while turning on any of the display portions 39a, 39b, 39c of the signal indicating lamp 39, and the crushed crushed material is conveyed from the chute 24 below the crushing device 3 to the conveyor. The magnetic material mixed in the crushed material (for example, the rebar pieces mixed in the construction waste material of concrete) was removed by the magnetic separator 7 during the transportation, and the size was almost equalized. Finally, the self-propelled crusher 1 is discharged from the rear part (right end in FIG. 1).

When the crushing work is completed, it is sufficient to operate in the reverse order of the above procedure. That is, the "shredder stop" button 66b, the "conveyor stop" button 67b, and the "magnetic separator stop" button 68b are sequentially pressed. As a result, the crusher control valve 33 is in the neutral position 33C, the conveyor valve 35 is in the shutoff position 35B, and the magnetic separator valve 3 is
6 returns to the shutoff position 36B, and the pressure oil in each pressure oil supply pipeline 53a, 57a, 58a flows into the tank 51 via the tank pipeline 63, and becomes equal to the pressure in the tank 51. As a result, the crushing device 3, the conveyor 6, and the magnetic separator 7 are stopped.

When the operator presses the "shredder reverse rotation" button 66c, the drive signal generating section 44a causes the "shredder stop" button 66b regardless of the control flow of FIG.
The crushing device 3 is driven in reverse until is pressed. Further, in this case, the load display control unit 44b moves from step 220 directly to step 280 as shown in FIG. 6 until the “shredder stop” button 66b is pressed, and the upper display portion 39a of the signal indicator lamp 39 is lit up and displayed.

(2) During self-driving For example, after the crushing work is completed, when the crusher 1 is to be run on a flat surface to mount the self-propelled crusher 1 on the transport trailer, the operator selects "run ",
Board the driver's seat 38 and operate the operation levers 41a and 42a. As a result, the left / right traveling control valve 3
4L and 34R are upper switching positions 34LA and 34R in FIG.
A (or lower switching position 34LB, 34RB in FIG. 3)
To the first and second hydraulic pumps 30A, 30
The pressure oil from B is the left and right traveling hydraulic motors 14L, 14R.
Are supplied to the traveling body 5 in the forward direction (or the backward direction), the traveling devices 5B on both sides of the self-propelled crusher 1 are driven in the forward direction (or the backward direction), and the traveling body 5 moves forward (or backward). Drive to.

According to one embodiment of the self-propelled crusher of the present invention configured as described above, the following effects can be obtained. That is, according to the present invention, when the load of the crusher hydraulic motor 10 is small, the load display control unit 44b causes the load display control unit 44b to display the lower display unit 39c of the signal indicator light 39 when the load is low. When the load is large, the middle display portion 39b is turned on, and when the load is large (corresponding to overload), the upper display portion 39a is turned on.

As a result, for example, when the lower display section 39c and the middle display section 39b corresponding to a relatively small load or a medium load are continuously lit for a relatively long time, it is difficult to crush a large crushed object. It can be confirmed that a good crushing operation can be maintained without throwing in objects or foreign substances or an excessive amount of crushed objects, and without causing wear or deterioration of the crushing device 3 and other components. If the load tends to increase gradually over a long period of time, the crushing device 3
It was found that wear and deterioration were occurring in the other components, and when the load suddenly increased, something that was particularly difficult to crush was put in, or the crushing device 3 and other components were large. It can be seen that wear and deterioration have occurred. In this way, unlike the conventional structure in which an alarm is displayed simply when the crushing device 3 is stopped or reversed in the overload state, the operator must closely monitor the crushing device 3 so that the crushing device 3 can always perform a good crushing operation. Therefore, productivity can be improved.

In addition, malfunctions of the crushing device 3 or wear / deterioration of the crushing device 3 and other components can be detected early, so that the maintenance time can be optimized.
It also has the effect of preventing a decrease in operating efficiency.

Furthermore, as described above, for example, before starting the crushing work, the object to be crushed is not put into an idle operation or a test piece having a predetermined strength is crushed, and at that time, It is also possible to determine whether the crushing device 3 is normal or abnormal by checking the display of the signal indicating lamp 39.

In the above-described embodiment of the present invention, it is determined whether or not the stop of the crushing device 3 is instructed in step 210 of FIG. 6 described above. However, the present invention is not limited to this. Known detection means for detecting the presence or absence of the engine 32 is provided in step 210.
It may be determined whether or not is driving. Also in this case, the same effect as that of the above-described embodiment of the present invention can be obtained. Further, in this case, even after the crushing work or the self-propelled work is completed, the load display control unit 44b continues the lighting display of the signal display lamp 39 until the engine 32 is stopped. As a result, for example, the crusher control valve 33 malfunctions for some reason, and the crusher control valve 33 returns to the neutral position 33C even though the "shredder stop" button 66b of the operation panel 43 is pressed. Instead, there is an effect that an abnormality such as when the load pressure of the crusher hydraulic motor 10 is increased can be detected.

Next, another embodiment of the self-propelled crusher of the present invention will be described with reference to FIGS. 7 and 8. In the present embodiment, a function of detecting the number of rotations of the crusher hydraulic motor 10 and displaying it on the surface of the operation panel is added. Figure 7
FIG. 4 is a hydraulic circuit diagram showing an overall structure of a hydraulic drive system in another embodiment of the self-propelled crusher of the present invention, which is a diagram corresponding to FIG. 3 in the one embodiment of the present invention. 7, the same parts as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 7, the controller 4 of this embodiment is
4'is a new function for the drive signal generation unit 44a and the load display control unit 44b, and is a rotation speed display control unit 44c.
Is equipped with. Reference numeral 71 is a rotation speed sensor for detecting the rotation speed of the crushing device hydraulic motor 10. The rotation speed display control unit 44c outputs a display control signal Sn based on the rotation speed signal N of the crushing device hydraulic motor 10 detected and output by the rotation speed sensor 71 to the operation panel 4 described later.
It is adapted to output to a rotation speed display section 72 provided at 3 '.

FIG. 8 is a front view showing a panel surface of an operation panel 43 'constituting another embodiment of the self-propelled crusher of the present invention, and FIG. 4 of the one embodiment of the present invention. It is a figure equivalent to. 8, the same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 8, 72 is
It is a rotation speed display unit for displaying the rotation speed of the hydraulic motor 10 for the crushing device provided on the board surface of the operation panel 43 '.
The rotation speed display unit 72 displays the rotation speed of the hydraulic motor 10 for the crushing device in RPM unit by, for example, a two-digit digital display based on the input of the display control signal Sn from the rotation speed display control unit 44c as described above. It is designed to be displayed with.

In the above, the rotation speed display section 72 constitutes rotation speed display means for displaying the detection value of the rotation speed sensor described in each claim.

In the present embodiment, the rotation speed display section 72 of the operation panel 43 'is controlled by the display control signal Sn from the rotation speed display control section 44c based on the rotation speed signal N from the rotation speed sensor 71 so that the crusher hydraulic motor. The number of rotations of 10 is displayed. Thus, the operator can monitor the load pressure of the crushing device hydraulic motor 10 that drives the crushing device 3 as well as the increase / decrease trend of the rotation speed N of the crushing device hydraulic motor 10.

For example, when the material to be crushed is charged into the hopper 2 in a relatively medium amount as described above, the signal indicator lamp 3 is used.
9, the middle display portion 39b is lit and displayed, but at this time, the rotation speed display portion 72 displays a relatively medium rotation speed.
From this state, for example, in the case of further increasing the input amount of the crushed object, when the load of the crushing device 3 is monitored only by the display of the signal indicating lamp 39, the time point when the load pressure Pcr> P ₁₁ (Fig. When the determination at step 260 in 6 is satisfied), the upper display portion 39a suddenly lights up. At this time, the input operator immediately stops the input of the crushed object, and the time calculator T> T ₁₁ for counting the time in the overload state is obtained (FIG. 5).
The load pressure Pcr
If ≦ P ₁₁ , the crushing device 3 continues the normal rotation drive.
However, even if the charging operation is stopped, for example, when a relatively large amount of the crushed objects that have been charged until then are accumulated in the hopper 2,
The overload condition of the crushing device 3 continues and the time calculator T> T ₁₁
Therefore, it is conceivable that the crushing device 3 starts reverse driving.

However, when the operator monitors the rotation speed of the crusher hydraulic motor 10 using the rotation speed display section 72, the upper display section 39a of the signal indicator lamp 39 lights up (load pressure Pcr as described above). > P ₁₁ ), the operator can determine that the load on the crushing device 3 is increasing due to the decreasing tendency of the rotation speed, and stop the input of the crushed object, for example. As a result, it is possible to prevent the crushing device 3 from being overloaded and driven in reverse.

That is, if only the signal indicator lamp 39 is used, the load condition of the crushing device 3 can be confirmed only in three stages of the display sections 39a, 39b, 39c, and the display of the signal indicator lamp 39 is changed as described above. It is possible that the response will not be in time even if you deal with it later. However, by monitoring the rotation speed of the crushing device hydraulic motor 10 displayed on the rotation speed display unit 72 together with the signal indicator lamp 39, the rotation speed before the crushing device 3 becomes overloaded as described above. It is possible to judge the excessive tendency of the material to be crushed by decreasing the value of.

As described above, the operator monitors the increase / decrease in the rotation speed of the hydraulic motor 10 for the crushing device, so that the operating condition of the crushing device 3 and the crushing device 3 and other self-propelled crushers 1 are monitored. It is possible to more closely monitor the signs of wear and deterioration of the components of the above. Thereby, productivity can be further improved.

Next, still another embodiment of the self-propelled crusher of the present invention will be described with reference to FIGS. 9 to 12. In this embodiment, the number of times of reverse drive of the crushing device 3 is displayed. FIG. 9 is a side view showing the overall structure of still another embodiment of the self-propelled crusher of the present invention, and is a view corresponding to FIG. 1 in the embodiment of the present invention. Further, FIG. 10 is a front view seen from the direction B in FIG. 9, and is a view corresponding to FIG. 2 of the embodiment of the present invention. 9 and 10, the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 9 and FIG. 10, reference numeral 73 denotes a reverse rotation number display section which is erected at the rear left end of the self-propelled crusher 1 of the power unit 8. Similar to the signal indicator lamp 39 in the above-described embodiment of the present invention, the reverse rotation number display portion 73 is easy to see for an operator such as a hydraulic excavator who is loading the crushed material into the hopper 2. In addition, the hopper 2 and the handrail 40 of the inspection step 40
It is installed at a position higher than a etc. Further, the reverse rotation number display section 73 is adapted to display the reverse rotation drive number of the crushing device 3 by, for example, a one-digit digital display based on the input of the display control signal Sr from the drive signal generation section 44a 'described later. ing.

FIG. 11 is a hydraulic circuit diagram showing the entire structure of the hydraulic drive system in still another embodiment of the self-propelled crusher of the present invention. FIG. It is a corresponding figure. 11, the same parts as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 11, the controller 44 ″ omits the load display control unit 44 b and controls the drive signal generation unit 44.
In place of the control content shown in FIG. 5 relating to the crushing device 3 of a, the drive signal generating unit 4 having a function of displaying the reverse driving number Nr of the crushing device 3 on the reverse rotating number display unit 73.
4a '.

FIG. 12 is a flow chart showing the control contents relating to the crushing device 3 including the above-mentioned reverse drive number display control of the control function of the drive signal generating section 44a ', and one embodiment of the present invention. 6 is a view corresponding to FIG. 5 in FIG. In FIG. 12, FLAG1 is a first flag for identifying whether the crusher hydraulic motor 10 is in an overloaded state, and is equivalent to the FLAG of FIG. Also FL
AG2 is a second flag for identifying whether or not the crushing device 3 has been driven in reverse, T ″ is a time calculator for counting the forward rotation drive duration after the crushing device 3 was last driven in reverse, Nr is the number of times of reverse driving of the crushing device 3.

First, in step 310, the first
The flag FLAG1, the second flag FLAG2, the time calculators T, T ', T ", and the reverse driving number Nr are cleared to 0. The next step 320, step 330, step 340, and step 530 are described above. Step 20, step 30, step 4 of one embodiment of the present invention
0, and the same as step 160. That is, in step 320, the "shredder stop" button 66 is pressed.
If b is not pressed, the first flag FLAG1 is determined in step 330, and if it is not overloaded, the hydraulic motor 10 for the crushing device is determined in step 340.
Is driven in the forward direction.

Next, in step 350, the second
It is determined whether the flag FLAG2 is 1 indicating that the crushing device 3 is driven in the reverse direction. For example, when the operation is started, the second flag FLAG2 is 0 because the crushing device 3 is not driven in the reverse direction, the determination is not satisfied, and the routine goes to Step 390.

Step 390, Step 410, Step 420, Step 430, Step 440, Step 450, Step 460, Step 470, Step 4
80 and step 490 are steps 50, 70, 80 of the above-described embodiment of the present invention.
Step 90, Step 100, Step 110, Step 120, Step 130, Step 140 are similar to steps 150 will not be described in detail, (state of _{Pcr> P 11)} overload condition of the crushing device 3 is the If it continues for longer than the threshold value T ₁₁ , the crushing device 3 performs step 4
Reverse drive is started at 50. When the reverse driving time of the crushing device 3 becomes longer than the threshold value T ₁₂ , step 47
If the determination of 0 is satisfied, step 480 and step 49
At 0, the time calculator T ′ and the first flag FLAG1 are cleared to 0, and the routine proceeds to step 500.

In step 500, the crushing device 3 described above is used.
The time calculator T ″ for counting the forward rotation driving time after the reverse rotation is cleared to 0, and the routine proceeds to step 510. At step 510, the second flag FLAG2 indicating whether or not the crushing device 3 is reversely driven is set to 1. After that, in step 520, 1 is added to the number of reverse drive Nr.
When step 20 ends, the process returns to step 320, and step 3
After 30 and step 340, the crushing device 3 starts the normal rotation driving again.

At this time, in step 350, the second flag FLAG2 is 1 indicating the reverse rotation driving state of the crushing device 3 as described above, so the determination in step 350 is satisfied and the routine goes to step 360.

In step 360, the time calculator T "
After adding 1 to step 370, the process proceeds to step 370. Step 37
At 0, it is determined whether or not this time calculator T ″ is larger than a threshold value T _13. This threshold value T ₁₃ is stable after the crushing device 3 finally performs the reverse rotation drive. It is a predetermined value stored in advance as the elapsed time of the forward rotation drive sufficient to determine that the drive has returned to the drive (or it may be set and input by an appropriate external input means). If T ₁₃ , the judgment is not satisfied,
Move to step 390. At this time, if Pcr ≦ P ₁₁ , step 390 to step 400, and then step 32
By repeating 0 to step 370, the crushing device 3
Continues forward drive. When the duration time of the normal rotation drive becomes longer than the threshold value T _{13 3} , the determination at step 370 is satisfied, and the routine goes to step 380.

In step 380, the number N of times of reverse rotation driving is performed.
r, the time calculator T ″, and the second flag FLAG2 are cleared to 0, and the state is the same as that at the time of starting operation, and the routine proceeds to step 390. After that, the same procedure as at the time of starting operation is repeated.

Incidentally, the above steps 320 to 37.
In the normal rotation driving state in which 0 → step 390 to step 400 is repeated, the crushing device 3 is for some reason.
Is overloaded (Pcr> P ₁₁ ), the determination at step 390 is satisfied, and step 390
→ Step 410 through step 420 and then step 32
0 to step 370 are repeated. Then, when the overload state of the crushing device 3 continues longer than the threshold value T ₁₁ , the determination of step 420 is satisfied, and step 430
Then, through step 440 and step 450, the crushing device 3 again starts reverse driving. After the reverse driving of the crushing device 3 is started, steps 450 to 470 are performed, and steps 320 to 330 → step 450.
As a result, the time calculator T ″ for counting the forward rotation driving elapsed time after the reverse rotation driving in step 360 is not counted (however, it has not been cleared yet).

After that, the crushing device 3 sets the threshold value T ₁₂
If the reverse rotation is continued for a longer time, the determination at step 470 is satisfied and the routine proceeds to step 480 and thereafter. At this time, the time calculator T ″ is cleared to 0 in step 500, and 1 is added to the reverse drive number Nr in step 520.
That is, at the start of the next forward rotation drive, the reverse rotation drive count Nr is accurately accumulated after the number of reverse drive of the crushing device 3 is added, and the forward rotation drive time is newly set from 0 to 0 by the time calculator T ″. It is supposed to count.

In the above, the drive signal generator 44a '
Constitutes reversal control means for reversing and controlling the hydraulic motor for driving the crushing device according to the detection value of the pressure sensor described in each claim, and the reversal frequency display unit 73 displays the reversal frequency. The step 380 in FIG. 11 constituting the number-of-times display means corresponds to an inversion-number clear means for clearing the number of inversions displayed by the inversion-number display means.

Next, the operation and action of still another embodiment of the self-propelled crusher of the present invention will be described below. In the self-propelled crusher 1 having the above-described configuration, during the crushing work, the operator activates the magnetic separator 7, the conveyor 6, and the crushing device 3 in the forward rotation direction in the same manner as in the above-described embodiment of the present invention. .

At this time, the drive signal generator 44a 'of the controller 44 "outputs the display control signal Sr based on the reverse drive number Nr to the reverse number display section 73 as described above, so that the reverse number display section 73 is displayed. The number of times of reverse rotation drive of the crushing device 3 is displayed, and the reverse rotation number display portion 73 shows 0 while the crushing device 3 is not reversely driven.

Next, when the material to be crushed is put into the hopper 2,
The crushing device 3 crushes the object to be crushed into a predetermined size. At this time, if the object to be crushed contains something that is difficult to crush or the input amount is excessive, the drive signal generation unit 44
The crushing device 3 is driven in reverse by a '. When the elapsed time of this reverse rotation drive becomes longer than the threshold value T ₁₂ , when FIG.
The determination at step 470 in 1 is satisfied, and the crushing device 3 returns to the normal rotation drive again. At this time, the reverse rotation driving number Nr becomes 1 in step 520, so that 1 is displayed on the reverse rotation number display portion 73.

The crushing device 3 which has started the normal rotation drive again by the above-mentioned procedure has the threshold value T for the normal rotation drive time after the reverse rotation drive.
_{When the} reverse load drive is performed again before the load reaches ₁₃ , the reverse drive number Nr is incremented by 1 in step 520 in FIG. 11, and 2 is displayed on the reverse frequency display portion 73. In this way, the reverse driving number Nr of the crushing device 3 is cumulatively displayed on the reverse number displaying unit 73.

In the state in which the crushing device 3 as described above is driven in the forward direction at least once and then in the forward direction, the forward drive time after the last reverse drive is longer than the threshold value T _13. If so, the determination at step 370 in FIG. 11 is satisfied, and the reverse drive count Nr is cleared to 0 at step 380.

In the present embodiment, by performing the above-described display control, for example, when the reverse driving frequency Nr is 0 or a small value and it has not increased for a relatively long time, the crushed object is crushed. There is no large crushed material that is difficult to crush, or foreign substances are mixed in, and the amount of the crushed object that is input is not excessive. Wear of the crushing device 3 and other components of the self-propelled crusher 1
It can be confirmed that good crushing operation can be maintained without deterioration. If the reverse drive frequency Nr has increased to about several times but has become 0 thereafter, the overload state of the crushing device 3 is eliminated by the reverse drive once or several times, and normal forward drive is performed. It can be confirmed that is continued for a sufficient time. Further, when the reverse driving number Nr is rapidly increased in a relatively short time, even if the reverse driving of the crushing device 3 is repeated, the load pressure P of the crushing device hydraulic motor 10 is increased.
It is conceivable that something that is difficult to crush such that cr is not reduced is introduced, or that the crushing device 3 and other components of the self-propelled crusher 1 are worn or deteriorated.

As described above, unlike the conventional structure in which an alarm is displayed simply when the crushing device 3 is stopped or reversed when the crushing device 3 is overloaded, the operator is careful to perform a good crushing operation at all times during the crushing work. Moreover, the operation status of the crushing device 3 can be monitored. Therefore, the productivity can be improved, and the operating condition of the crushing device 3 is normal / abnormal, and the crushing device 3 and other components of the self-propelled crusher 1 are not worn /
The presence / absence of deterioration can be more easily determined.

In yet another embodiment of the self-propelled crusher of the present invention described above, the reverse rotation number display portion 73 is provided at one rear left end portion of the self-propelled crusher 1. Not limited to That is, as shown by the chain double-dashed line in FIG. 10, the self-propelled crusher 1 is also installed at the rear right end,
Two sets may be provided similarly to the signal indicating lamp 39 in the embodiment of the present invention. Also in this case, the same effect as that of the other embodiment of the present invention can be obtained.

In the above-described one embodiment and other embodiments of the present invention, the case where the present invention is applied to the self-propelled crusher 1 equipped with the shear crushing device 3 has been described as an example. , But not limited to this. That is, another crushing device, for example, a rotary crushing device (so-called roll crusher or the like) that rotates the pair in opposite directions by forming a pair of crushing blades attached to a roll-shaped rotating body,
A crushing device (so-called jaw crusher) that oscillates the moving teeth with respect to the fixed teeth to sandwich the crushed object between them and a crushing plate equipped with a plurality of blades is rotated at high speed. Self-propelled machine equipped with a crushing device (so-called impact crusher) that impacts and crushes objects to be crushed by using the impact from a ball and a collision with a repulsion plate, and a wood crushing device that cuts wood into pieces with a rotor equipped with a cutter. It can also be applied to a crusher.

[0131]

According to the present invention, the load pressure of the hydraulic motor for driving the crushing device is detected and displayed so that the crushing device can be closely monitored so that the crushing device can always perform a good crushing operation. Therefore, the productivity can be improved. Further, since the malfunction of the crushing device or the wear / deterioration of the crushing device and other components can be detected at an early stage, there is also an effect of preventing a decrease in operating efficiency. Furthermore, by checking the load pressure when the crushing device is running idle or when the test piece with a predetermined strength is crushed by trial,
It is also possible to judge whether the crushing device is normal or abnormal.

[Brief description of drawings]

FIG. 1 is a side view showing the overall structure of an embodiment of a self-propelled crusher of the present invention.

FIG. 2 is a front view seen from the direction A in FIG.

FIG. 3 is a hydraulic circuit diagram showing an overall configuration of a hydraulic drive system in an embodiment of the self-propelled crusher of the present invention.

FIG. 4 is a front view showing a panel surface of an operation panel that constitutes an embodiment of the self-propelled crusher of the present invention.

FIG. 5 is a flow chart showing a control content related to control of the crushing device among the control functions of the drive signal generating unit that constitutes one embodiment of the self-propelled crusher of the present invention.

FIG. 6 is a flow chart showing the control contents of a load display control unit that constitutes an embodiment of the self-propelled crusher of the present invention.

FIG. 7 is a hydraulic circuit diagram showing an overall configuration of a hydraulic drive system in another embodiment of the self-propelled crusher of the present invention.

FIG. 8 is a front view showing a panel surface of an operation panel constituting another embodiment of the self-propelled crusher of the present invention.

FIG. 9 is a side view showing the overall structure of still another embodiment of the self-propelled crusher of the present invention.

10 is a front view seen from the direction B in FIG.

FIG. 11 is a hydraulic circuit diagram showing an overall configuration of a hydraulic drive system in still another embodiment of the self-propelled crusher of the present invention.

FIG. 12 is a flow chart showing the control content related to control of the crushing device, among the control functions of the drive signal generating unit that constitutes still another embodiment of the self-propelled crusher of the present invention.

[Explanation of symbols]

1 Self-propelled crusher 3 crusher 5A body frame (frame) 5B Travel device (travel means) 6 conveyor 10 Hydraulic motor for crusher (hydraulic motor) 39 Signal indicator lamp (pressure indicator) 39a Upper display section (pressure display means) 39b Middle display (pressure display means) 39c Lower display (pressure display means) 44a 'Drive signal generator (inversion controller) 44b Load display control unit (determination means) 55 Pressure sensor 71 Rotation speed sensor 72 Rotation speed display section (rotation speed display means) 73 Reverse rotation count display section (reversal count display means)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Onami Azuma             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Masamichi Tanaka             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Jun Ikeda             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory F-term (reference) 4D067 DD04 FF04 FF15 GA06 GA18                       GB03

Claims (4)

[Claims] 1. A frame, a traveling means provided on the frame, a crushing device provided on one longitudinal side of the frame, and a crushing device extending from a position below the crushing device to a position outside the longitudinal direction of the frame. A conveyor, a pressure sensor that detects the load pressure of the hydraulic motor that drives the crushing device, a judgment unit that makes a predetermined judgment regarding the operating state based on the detection value of this pressure sensor, and the judgment result of this judgment unit is displayed. A self-propelled crusher characterized by comprising: 2. A frame, a traveling means provided on the frame, a crushing device provided on one longitudinal side of the frame, and a crushing device extending from a position below the crushing device to an outer position in the longitudinal direction of the frame. A conveyor, a pressure sensor that detects the load pressure of the hydraulic motor that drives the crushing device, a judgment unit that makes a predetermined judgment regarding the operating state based on the detection value of this pressure sensor, and the judgment result of this judgment unit is displayed. Self-propelled, which comprises: a pressure display means for controlling the rotation speed of the hydraulic motor for driving the crushing device; and a rotation speed display means for displaying a detection value of the rotation speed sensor. Type crusher. 3. A frame, a traveling means provided on the frame, a crushing device provided on one side in the longitudinal direction of the frame, and a crushing device extending from a position below the crushing device to an outer position in the longitudinal direction of the frame. A conveyor, a pressure sensor that detects a load pressure of a hydraulic motor that drives the crushing device, an inversion control unit that inverts a hydraulic motor that drives the crushing device according to a detection value of the pressure sensor, and the hydraulic motor A self-propelled crusher, comprising: a reversal number display means for displaying the number of reversals. 4. The self-propelled crusher according to claim 3, wherein the number of times of reversal displayed by the number of times of reversal display is cleared according to the elapsed time after the reversal control is finally performed by the reversal controller. A self-propelled crusher equipped with means for clearing the number of times of inversion.