JP2003170076A - Self-propelling crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-propelling crusher, which can lighten operator's burden at a start-up time. <P>SOLUTION: The self-propelling crusher is provided with a first oil-hydraulic pump 30A, an engine 32, a photoelectric sensor 72, a drive controller 47a, and a fuel-injection controller 68. The pump 30A delivers pressure oil to an oil- hydraulic motor 10 for driving crushing equipment 3. The engine 32 drives the pump 30A. The photoelectric sensor 72 detects that a to-be-crushed material is charged in the crushing equipment 3. The drive controller 47a starts up the engine 32 and the crushing equipment 3 in response to a detected result of the sensor 72. The controller 68 controls fuel injection into the engine 32. <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]

2. Description of the Related Art In recent years, a self-propelled crusher that crushes crushed objects with a crushing device under the background of promoting the reuse of waste such as enforcement of the Recycling Resource Promotion Law (so-called recycling law) (October 1991). The field of activity of is expanding. At this time, several types of crushing devices have already been proposed,
As particularly suitable for crushing construction waste materials, household electric appliances, plastic waste materials, old tires, etc., for example, as described in Utility Model Registration No. 2604492, each of a plurality of rotating shafts arranged substantially parallel to each other. Fix the rotating teeth,
A self-propelled crusher equipped with a shear-type crushing device (such as a biaxial shearing machine including a so-called shredder) that shears the object to be crushed into thin pieces has been proposed. At this time, in particular, in this conventional technique, an open type hopper is provided above the crushing device in order to receive and temporarily store the object to be crushed and to suppress scattering of the crushed pieces.

Then, for example, the crushed material thrown into the hopper above the self-propelled crusher by a grapple (a hydraulic shovel having an attachment for holding the crushed material attached to the tip thereof) is used as a crushing device below the hopper. After being crushed to a predetermined size by this crushing device, the crushed material falls on the conveyor below the crushing device and is transported by this conveyor, and finally below the discharge side end of the conveyor. It falls and is loaded.

[0004]

As described above, usually, a crushed object is often loaded into the hopper by a self-propelled loading machine such as a hydraulic excavator. In this case, normally, from the viewpoint of labor saving, the self-propelled crusher is operated unattended without a dedicated operator for the self-propelled crusher, and the operator of the hydraulic excavator that inputs the crushed object inputs it. It often takes the form of simultaneously monitoring the crushing status of the self-propelled crusher while performing. Thus, the operator of the hydraulic excavator doubles as the operator of the self-propelled crusher, so that the dedicated operator of the self-propelled crusher can be omitted.

However, in this case, the operator of the hydraulic excavator first goes to the driver's seat of the self-propelled crusher and operates the operation panel to operate the engine before boarding the operator's seat of the hydraulic excavator each time the operation is started. Then, start the conveyor and the crushing device manually in this order to put the self-propelled crusher into the operating state, and after confirming that each part has started normally, descend from the self-propelled crusher and move to the hydraulic excavator. It is necessary to move to and board the driver's seat, which imposes a heavy physical and mental burden.

The present invention has been made on the basis of the above matters, and an object thereof is to provide a self-propelled crusher capable of reducing the burden on the operator at the start of operation.

[0007]

(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 a crushing device provided on the frame. , A hydraulic pump for discharging pressure oil to a hydraulic motor for a crushing device that drives this crushing device, an engine that drives this hydraulic pump, and charging or preparation for charging the crushed device into the crushing device, or An input detecting means for detecting the presence of the input machine and an activation control means for activating the engine and the crushing device according to the detection result of the input detecting means are provided. In the present invention, when the operator of the hydraulic excavator loads the crushed object into the crushing device via, for example, a hopper, the charging detection means detects the charging or preparation of charging into the crushing device, or the existence of the charging operator or the charging machine. Then
The activation control means automatically activates the engine and the crushing device according to the detection result. As a result, at the start of operation of the self-propelled crusher, the operator of the hydraulic excavator does not have to be in the driver's seat of the self-propelled crusher, but can directly board the operator's seat of the hydraulic excavator and throw in the crushed object. It will be good. Therefore, compared to the conventional structure where the operator of the hydraulic excavator had to go to the driver's seat of the self-propelled crusher and manually start the engine and crusher each time the operation was started, the physical
The mental burden can be greatly reduced.

(2) In the above item (1), preferably,
The activation control means includes an injection control means for controlling fuel injection into the engine.

(3) In the above (1) or (2),
Further preferably, the activation control means outputs a drive signal for switching a crushing device control valve for controlling a flow of pressure oil from a hydraulic pump to the crushing device hydraulic motor for driving the crushing device. Means are provided.

[0010]

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 top view of the self-propelled crusher shown in FIG. Further, FIG. 3 is a front view seen from the direction A in FIG.

In these FIGS. 1 to 3, 1 is a self-propelled crusher, 2 is a crushed object (for example, construction waste, household electric appliances, plastic waste, old tires) by a heavy machine such as a hydraulic excavator equipped with a grapple or the like. Etc. are charged into the hopper 3, a shear type crushing device (in this example, a biaxial shredder) that shears the crushed object received in the hopper 2, crushes it into a predetermined size, and discharges it downwards. Crusher body,
5 is a traveling body provided below the crusher main body 4, 6
Is a conveyor that receives the crushed material crushed by the crushing device 3 and discharged downward, and conveys the crushed material to the rear side (the right side in FIGS. 1 and 2) of the self-propelled crusher 1 and carries it out, 7 is the conveyor A magnetic separator 8 is provided above 6 to magnetically attract and remove magnetic substances (reinforcing bars and the like) contained in the crushed substances being conveyed on the conveyor 6, and 8 is a power unit.

The self-propelled crusher 1 includes the crusher body 4
And the power unit 8 as a power unit, and the traveling body 5 on which the crusher body 4 and the power unit 8 are mounted.
And the conveyor 6.

The hopper 2 is a hopper having a diameter-expanding shape that opens upward to receive an object to be crushed, and the crusher 3
Is located above. The hopper 2 is detachably attached to the upper portion of the housing 3a of the crushing device 3 by, for example, bolts and nuts.

The crushing device 3 is mounted on an end portion of a main body frame crushing device mounting portion 5Aa, which is on the front side of the self-propelled crushing device 1 (the left side in FIGS. 1 and 2 and the front side in FIG. 3). There is. The crushing device 3 is a biaxial shearing machine (so-called shredder, shearing type crushing device), and the spacer 3
Two rotating shafts (not shown) having cutters (rotating teeth) 3c attached in a comb-like shape at predetermined intervals via b are arranged substantially parallel to each other and the cutters 3c are alternately meshed 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 to the rotating shaft is applied to the crushing device 3 on the main body frame crushing device mounting portion 5Aa described later.
The drive force from the hydraulic motor 10 for the crushing device in the drive device 9 provided on the rear side (that is, the intermediate portion in the front-rear direction of the self-propelled crusher 1 of the main frame crushing device mounting portion 5Aa) is driven by a gear mechanism (not shown). Is given to each axis of rotation by distributing in.

The crusher main body 4 comprises the hopper 2, the crushing device 3 and the driving device 9.

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 caused to run by being given a driving force by 14R.

A portion of the conveyor 6 on the discharge side (the rear side of the self-propelled crusher 1) is suspended and supported by an arm member 15 provided so as to project from the power unit 8 via support members 16a and 16b. The portion of the conveyor 6 opposite to the discharge side (the front side of the self-propelled crusher 1) is located below the main frame crusher attachment 5Aa, and the crusher attachment 5Aa is interposed via a support member 17. It is supported so that it can be suspended from. As a result, the conveyor 6 is attached to the main body frame crushing device mounting portion 5
From below Aa, through below the power unit 8,
The main body frame 5A is arranged on the rear side outward of the self-propelled crusher 1 with an upward inclination.

Reference numeral 18 is a frame, 19 is a drive wheel supported by the frame 18, and 20 is a drive wheel 1
Hydraulic motor for conveyor that drives 9 (see FIG. 2), 21
Is a conveyor belt wound around the driving wheel 20 and a driven wheel (not shown), and 22 is a roller for supporting the conveying surface of the conveyor belt 21. At this time, 2
3 is a bearing mechanism (not shown) that supports the rotating shaft of the driven wheel.
Is a well-known tension adjusting mechanism capable of displacing in a substantially horizontal direction, whereby the tension of the conveyor belt 21 can be adjusted.

Reference numeral 24 denotes a crushed material chute, which is provided below the crushing apparatus 3 and guides a crushed material generated by crushing by the crushing apparatus 3 downward. The conveyor 6
Is the crushed material derived from this crushed material chute 24,
By circulating the conveyor belt 21, the conveyor belt 21 is conveyed and discharged.

The magnetic separator 7 is suspended and supported by the arm member 15 via a supporting 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 via a power unit loading member 29 above the rear side end of the self-propelled crusher 1 of the main body frame crusher attachment 5Aa. The power unit 8 includes the hydraulic motor 10 for the crushing device and the left and right traveling hydraulic motors 14L, 14
R, the conveyor hydraulic motor 20, and the first and second hydraulic pumps 30A and 30B that discharge pressure oil to hydraulic actuators such as the magnetic motor 27 for the magnetic separator (see FIG.
Reference) and auxiliary hydraulic pump (pilot pump) 31
(See FIG. 5 described later) and these hydraulic pumps 30A, 30
An engine 32 (see FIG. 5 described later) as a prime mover for driving B and 31, and the hydraulic pumps 30A, 30B and 31.
To control the flow of pressure oil supplied to each of the hydraulic actuators (the crushing device hydraulic motor 10, the left and right traveling hydraulic motors 14L and 14R, the conveyor hydraulic motor 20, and the magnetic separator hydraulic motor 27). Multiple valves (crusher control valve 33, left / right traveling control valves 34L, 34R, conveyor valve 3
5, a control valve device (not shown) including a magnetic separator valve 36 (see FIG. 5 described later)) is incorporated.

Returning to FIG. 1, on the front side of the self-propelled crusher 1 of the power unit 8 (left side in FIGS. 1 and 2), there is provided a driver's seat 37 on which an operator rides. This driver's seat 3
7, the left and right traveling control valves 34L,
For example, left / right operating levers 38La, 38Ra are provided as operating means for switching the 34R to control the drive speed of the left / right traveling hydraulic motors 14L, 14R.

An operation panel 39 is provided above the power unit 8 near the driver's seat 37, for example. FIG. 4 is a front view showing the surface of the operation panel 39. In FIG. 4, 40 is a meter unit including a fuel gauge,
Reference numeral 41 denotes a key switch for manually starting / stopping the engine 32 and for putting it in a standby state.
b and 42c are "shredder forward rotation", "shredder stop" and "shredder reverse rotation" buttons for driving the crushing device 3 in the normal rotation, stop and reverse rotations, respectively 43a and 43b.
Is a "conveyor start" or "conveyor stop" button for starting and stopping the conveyor 6, and 44a and 44b are
"Starting the magnetic separator" for starting and stopping the magnetic separator 7
The "magnetic separator stop" button, 45 is an operation selection switch for selecting one of a "running" mode in which a running operation is performed and a "crushing" mode in which a crushing operation is performed.

The "standby" of the key switch 41
Is for putting the engine 32 into a standby state so that the engine 32 is automatically started when the input of the crushed object is detected (details will be described later). However, when the key switch 41 is "OFF", the engine 32 is not automatically started even when the input of the crushed object is detected.

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 structure of this hydraulic drive system is shown in FIG.
Will be explained. FIG. 5 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. 5, 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,
20 and 27 are the first and second hydraulic pumps 30, respectively.
A hydraulic motor for a crushing device to which pressure oil discharged from A and 30B is supplied, a hydraulic motor for left traveling, a hydraulic motor for right traveling, a hydraulic motor for conveyor, and a hydraulic motor for magnetic separator,
33, 34L, 34R, 35, 36 are respectively the first
And the second hydraulic pumps 30A and 30B supply the respective hydraulic motors (the crushing device hydraulic motor 10, the left and right traveling hydraulic motors 14L and 14R, the conveyor hydraulic motor 20, and the magnetic separator hydraulic motor 27). A control valve for a crushing device that controls the flow (direction and flow rate) of pressure oil, a control valve for left traveling, a control valve for right traveling, a valve for conveyor, and a valve for magnetic separator. The left and right traveling operation lever devices 38L and 38R are provided on the driver's seat 37 for switching the left traveling control valve 34L and the right traveling control valve 34R, respectively, and 39 is as described above. Operation panel provided on the power unit 8
6 is a solenoid valve for traveling lock, 47 is a drive control unit 4.
7a is a controller.

The first and second hydraulic pumps 30A, 30
B and the discharge lines 48A, 4 of the pilot pump 31
Relief valves 50A, 50B and 51 are provided in the pipelines 48Aa, 48Ba and 49a branched from 8B and 49, respectively, and the first and second hydraulic pumps 30 are provided.
The relief pressure values for limiting the maximum discharge pressures of A, 30B and the pilot pump 31 are set by the urging forces of the springs 50Aa, 50Ba and 51a provided respectively.

The left traveling control valve 34L
Is a three-position switching valve of a hydraulic pilot system capable of controlling the direction and flow rate of pressure oil to the left traveling hydraulic motor 14L, and the crushing device control valve 33 is connected to the crushing device hydraulic motor 10. It is a three-position electromagnetic switching valve capable of controlling the direction and flow rate of pressure oil. The left traveling control valve 34L and the crushing device control valve 33 are connected to the discharge line 4 of the first hydraulic pump 30A.
In the center bypass line 48Ab connected to 8A, from the upstream side, the left travel control valve 34
L and the crusher control valve 33 are arranged in this order.

The left traveling control valve 34L
Is operated by the pilot pressure generated by the pilot pump 31 and reduced to a predetermined pressure by the left traveling operation lever device 38L. That is, the left traveling operation lever device 38L includes the left traveling operation lever 38La and a pair of pressure reducing valves 38Lb, 38Lb for outputting pilot pressure according to the operation amount thereof. When the left traveling operation lever 38La of the left traveling operation lever device 38L is operated in the direction B in FIG. 5 (or the opposite direction, the same applies in parentheses hereinafter), the pilot pressure is changed to the pilot line 5.
2a (or 52b) to the drive unit 34La (or 34Lb) of the left traveling control valve 34L,
As a result, the left traveling control valve 34L is moved to the upper switching position 34LA (or the lower switching position 3 in FIG. 5).
4LB), and the pressure oil from the first hydraulic pump 30A causes the discharge line 48A, the center bypass line 48Ab, and the switching position 34LA (or the lower switching position 34L of the left traveling control valve 34L).
B), and the left traveling hydraulic motor 14 via the forward rotation side pressure oil supply pipeline 53a (or the reverse rotation side pressure oil supply pipeline 53b).
The hydraulic pressure motor 14L for left traveling is driven in the forward direction (or the reverse direction).

When the left traveling operation lever 38La is set to the neutral position shown in FIG. 5, the left traveling control valve 34L is returned to the neutral position 34LC shown in FIG. 5 by the urging force of the springs 34Lc and 34Ld. The traveling hydraulic motor 14L is stopped.

The traveling lock solenoid valve 46 is connected to a conduit 49b branched from the discharge conduit 49 of the pilot pump 31. The travel lock solenoid valve 46 is switched by a drive signal St generated and output by the drive controller 47a of the controller 47. That is, the travel lock solenoid valve 46 is switched to the communication position 46A on the left side in FIG. 5 when the drive signal St input to the solenoid 46a is turned on, and the pilot pressure introduced through the pipe line 49b is introduced. The left / right traveling operation lever devices 38R and 38L are guided through the road 54, and the left traveling operation lever 38La is used to operate the left traveling control valve 34L and the right traveling operation lever 38R described later.
It is possible to operate the right traveling control valve 34R by a. On the other hand, when the drive signal St is turned off, the traveling lock solenoid valve 46 is returned to the cut-off position 46B on the right side in FIG. 5 by the restoring force of the spring 46b, and the pipe line 49b.
And the introduction pipe line 54 and the introduction pipe line 5
4 is communicated with a tank line 56 connected to the tank 55, and the pressure in the introduction pipe line 54 is made substantially equal to the tank pressure. As a result, the left / right traveling operation lever device 38
Control valve 34 for left / right travel by L and 38R
The operation of L and 34R is made impossible.

Control valve 33 for the crushing device
Is a forward rotation drive signal Scr1 or a reverse rotation drive signal Scr2 output from the drive control unit 47a of the controller 47.
Can be switched by. That is, when the forward drive signal Scr1 output to the solenoid drive unit 33a of the crusher control valve 33 is turned on and the reverse drive signal Scr2 output to the solenoid drive unit 33b is turned off, the crusher control valve 3 is turned on.
3 is switched to the upper switching position 33A in FIG. As a result, the pressure oil from the first hydraulic pump 30A is transferred to the discharge conduit 48A and the center bypass line 48A.
b, the neutral position 34LC of the left traveling control valve 34L, the switching position 33A of the crushing device control valve 33, and the forward rotation side pressure oil supply line 57a, to the hydraulic motor 10 for the crushing device. The crusher hydraulic motor 10 is driven in the forward direction.

On the other hand, the control valve 33 for the crushing device
When the forward drive signal Scr1 output to the solenoid drive unit 33a is turned off and the reverse drive signal Scr2 output to the solenoid drive unit 33b is turned on, the crusher control valve 33 is switched to the lower switching position 33B in FIG. Is switched to. Thereby, the first hydraulic pump 30A
Is supplied to the crusher hydraulic motor 10 through the switching position 33B and the reverse rotation side pressure oil supply pipe 57b, and the crusher hydraulic motor 10 is driven in the opposite direction.

The forward and reverse drive signals Scr1 and Scr2
When both are turned off, the crusher control valve 33 returns to the neutral position 33C shown in FIG. 5 by the restoring force of the springs 33c and 33d, and the pressure oil from the first hydraulic pump 30A is shut off, so that the crusher The hydraulic motor 10 stops.

The right traveling control valve 34R
Is a three-position switching valve of a hydraulic pilot system capable of controlling the direction and flow rate of pressure oil to the right traveling hydraulic motor 14R, and the discharge line 48B of the second hydraulic pump 30B.
Is arranged on the center bypass line 48Bb connected to.

This right traveling control valve 34R
Is operated by the pilot pressure of the right traveling operation lever device 38R in the same manner as the left traveling control valve 34L described above, and the right traveling operation lever 38Ra is moved in the direction C in FIG. If the pilot pressure is changed to the pilot line 5
8a (or 58b) to the drive unit 34Ra (or 34Rb) of the right traveling control valve 34R,
As a result, the right travel control valve 34R is shown in FIG.
Upper switching position 34RA (or lower switching position 34R)
B). As a result, the pressure oil from the second hydraulic pump 30B is transferred to the switching position 34RA (or the lower switching position 34RB) and the normal rotation side pressure oil supply conduit 59a.
(Or, it is supplied to the right traveling hydraulic motor 14R via (or the reverse rotation side pressure oil supply conduit 59b) and is driven in the forward direction (or reverse direction). When the operating lever 38Ra for right traveling is set to the neutral position shown in FIG. 5, the control valve 3 for right traveling is set.
4R is returned to the neutral position 34RC shown in FIG. 5 by the biasing force of the springs 34Rc and 34Rd, and the right traveling hydraulic motor 14 is driven.
R stops.

The right traveling operation lever device 38R
The pilot pressure to is supplied from the pilot pump 31 via the traveling lock solenoid valve 46, as in the above-described left traveling operation lever device 38L. Therefore, as described above, when the drive signal St input to the travel lock solenoid valve 46 is turned on, the right travel control valve 34R can be operated by the right travel operation lever device 38R, and the drive signal St is When turned off, the above operation of the right traveling control valve 34R becomes impossible.

A shunt valve 60 is connected to the center bypass line 48Bb downstream of the right travel control valve 34R. The flow dividing valve 60 is a flow dividing valve known as this type having a pressure compensating function, although a detailed structural description thereof is omitted. With this flow dividing valve 60, regardless of the load pressure of the conveyor hydraulic motor 20 or the magnetic separator hydraulic motor 27, for example, (the amount of pressure oil supplied to the conveyor hydraulic motor 20) is always: (Magnetic separator hydraulic pressure). The amount of pressure oil supplied to the motor 27) is distributed and supplied at a ratio of 2: 1. That is, when the right travel control valve 34R is not operated, 2/3 of the pressure oil from the second hydraulic pump 30B is branched from the conveyor valve 35, the pipeline 61, and the pipeline 61. 1/3 of the pressure oil from the second hydraulic pump 30B to the conveyor hydraulic motor 20 via the pressure oil supply pipe 61a and the magnetic separator valve 36, the pipe 62, and the pipe 62 are branched. It is adapted to be distributed and supplied to the magnetic motor for magnetic separator 27 via the pressure oil supply pipe line 62a.

The conveyor valve 35 and the magnetic separator valve 3 to which the pressure oil is distributed and supplied by the flow dividing valve 60.
Reference numeral 6 denotes a controllable direction and flow rate of the pressure oil to the conveyor hydraulic motor 20 and the magnetic separator hydraulic motor 27.
It is a position solenoid switching valve.

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 control unit 47a of the controller 47, and the conveyor valve 35 is switched according to the input of the drive signal Scon. It has become. That is, when the drive signal Scon output to the solenoid drive section 35a is turned on, the conveyor valve 35 is switched to the upper communication position 35A in FIG. Accordingly, the right travel control valve 34
The pressure oil from the second hydraulic pump 30B guided through the neutral position 34RC of R and the flow dividing valve 60 is supplied from the communication position 35A to the pipe line 61 and the pressure oil supply pipe line 6.
It is supplied to the conveyor hydraulic motor 20 via 1a, and the conveyor hydraulic motor 20 is driven. The return oil at this time returns to the tank 55 through the discharge pipeline 64 connected to the tank pipeline 63 and the tank pipeline 63. When the drive signal Scon output to the solenoid drive unit 35a is turned off, the conveyor valve 3
5 is returned to the cutoff position 35B shown in FIG. 5 by the urging force of the spring 35b, and 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 drive signal Sm from the drive control portion 47a of the controller 47. .
Drive signal Sm output to this solenoid drive unit 36a
When turned on, the magnetic separator valve 36 is switched to the communication position 36A on the upper side in FIG.
The pressure oil from B is the control valve 34 for the right traveling.
The R neutral position 34RC, the flow dividing valve 60, the communication position 36A, the conduit 62, and the pressure oil supply conduit 62a.
Is supplied to the magnetic motor 27 for the magnetic separator, and the hydraulic motor 27 for the magnetic separator is driven. The return oil returns to the tank 55 via the discharge pipeline 65 connected to the tank pipeline 63 and the tank pipeline 63. When the drive signal Sm output to the solenoid drive unit 36a is turned off, the magnetic separator valve 36 is pressed by the spring 36b.
After returning to the shut-off position 36B shown in, the magnetic motor 27 for the magnetic separator stops.

From the viewpoint of circuit protection, relief valves 66 and 67 are provided in the conduits 61b and 62b branched from the conduits 61 and 62 of the conveyor valve 35 and the magnetic separator valve 36, respectively. The value of the relief pressure for limiting the maximum value of the supply pressure of the conveyor hydraulic motor 20 and the magnetic separator hydraulic motor 27 is set by the urging force of the springs 66a and 67a provided for each. ing.

In the engine 32, which is the prime mover of the first and second hydraulic pumps 30A and 30B and the pilot pump 31, which discharge pressure oil to the above-mentioned hydraulic actuators, the fuel injection control device 68, the fuel injection device 69, For example, a rotation speed sensor 71 that detects the rotation speed Nen of the starter motor 70 and the engine 32 is integrally provided.
The fuel injection control device 68 receives the injection control signal Sen input from the drive control unit 47a of the controller 47.
Based on the above, the fuel injection amount of, for example, a known fuel injection pump (not shown) provided in the fuel injection device 69 is controlled. The engine speed Nen according to the fuel injection amount
The rotation speed Nen is detected by the rotation speed sensor 71 and fed back to the drive control unit 47a. The drive control unit 47a compares the rotation speed Nen of the engine 32 detected by the rotation speed sensor 71 with the engine rotation speed set by, for example, a throttle device (not shown), and the difference is reduced so as to reduce the difference. Fuel injection control device 6
The injection control signal Sen is output to 8. In this way, the rotation speed Nen of the engine 32 is controlled by the drive control unit 47a.

The starter motor 70 is known as this type for starting the internal combustion engine, and based on the start control signal Sc input from the drive control section 47a of the controller 47, the rotational drive force of the electric motor device is generated. Engine 32
Is transmitted to the ring gear to start the engine 32.

The operation panel 39 is provided with various buttons, switches and the like as described above with reference to FIG. When the operator operates various buttons and switches on the operation panel 39, the operation signal Sa is input to the drive control section 47a of the controller 47. This drive control unit 47a
Generates and outputs the injection control signal Sen to the fuel injection control device 68 and the start control signal Sc to the starter motor 70 based on the operation signal Sa from the operation panel 39, and at the same time, the control valve for the crushing device described above. 33 (solenoid drive parts 33a, 33b), conveyor valve 3
5, magnetic selector valve 36, travel lock solenoid valve 4
The drive signals Scr1, Scr2, Scon, Sm, St to 6 are generated and output to the corresponding solenoids.

That is, when the key switch 41 of the operation panel 39 is set to "start", the operation signal Sa is output from the operation panel 39 to the drive control section 47a. As a result, the drive control unit 47a outputs a start control signal Sc corresponding to the operation signal Sa to drive the starter motor 70 to generate a spark by an ignition plug (not shown), and in response to the operation signal Sa. The fuel injection control device 6
The injection control signal Sen is output to 8 to start the engine 32. On the other hand, the key switch 41 is turned off.
In the case of, the drive control unit 47a turns off the injection control signal Sen output to the fuel injection control device 68. As a result, the fuel injection device 69 stops the injection of fuel,
The engine 32 is designed to stop.

When "travel" is selected by the operation selection switch 45 of the operation panel 39, the drive control section 47 is used.
a turns on the drive signal St output to the traveling lock solenoid valve 46. As a result, as described above, the traveling lock solenoid valve 46 is connected to the communication position 4 on the left side in FIG.
6A, the left and right operation levers 38La, 3
The control valve 34 for left / right traveling by 8Ra
It becomes possible to operate L and 34R. When “crush” is selected by the operation selection switch 45 of the operation panel 39,
The drive control unit 47a turns off the drive signal St output to the travel lock solenoid valve 46. As a result, the travel lock solenoid valve 46 is moved to the right shut-off position 46 in FIG.
After returning to B, the left and right operation levers 38La and 38Ra cannot operate the left and right traveling control valves 34L and 34R.

When the "shredder forward rotation" button 42a (or the "shredder reverse rotation" button 42c, hereinafter the same in parentheses) is pressed on the operation panel 39,
The drive control unit 47a turns on (or turns off) the forward drive signal Scr1 to the solenoid drive unit 33a of the crusher control valve 33, and turns off the reverse drive signal Scr2 to the solenoid drive unit 33b ( Or ON). As a result, as described above, the control valve 33 for the crushing device causes the switching position 33 on the upper side in FIG.
A (or the lower switching position 33B) is switched to, the pressure oil from the first hydraulic pump 30A is supplied to the hydraulic motor 10 for the crushing device, and the crushing device 3 is started in the normal direction (or reverse direction). To do. After that, when the "shredder stop" button 42b is pressed, the drive control unit 47a causes the normal rotation /
Both the reverse drive signals Scr1 and Scr2 are turned off, and the control valve 33 for the crushing device is moved to the neutral position 33 shown in FIG.
By returning to C, the crushing device 3 is stopped.

In addition, the "start conveyor" of the operation panel 39
When the button 43a is pressed, the drive control unit 47a causes the solenoid drive unit 35a of the conveyor valve 35 to operate.
The drive signal Scon to is turned on. As a result, as described above, the conveyor valve 35 is switched to the communication position 35A on the upper side in FIG. 5, the pressure oil from the second hydraulic pump 30B is supplied to the conveyor hydraulic motor 20, and the conveyor 6 is activated. . After that, when the "conveyor stop" button 43b is pressed, the drive control unit 47a causes the drive signal S to the solenoid drive unit 35a of the conveyor valve 35.
The con is turned off to return to the shutoff position 35B shown in FIG. 5, whereby the conveyor 6 is stopped.

Similarly, the "start magnetic separator" button 44a.
When is pressed, the magnetic separator valve 36 is switched to the upper communication position 36A in FIG. 5, and the magnetic separator 7 is activated.
After that, when the "magnetic separator stop" button 44b is pressed, the magnetic separator valve 36 returns to the shutoff position 36B, whereby the magnetic separator 7 is stopped.

As described above, the drive control section 47a uses the operation signal Sa from the operation panel 39 to generate the injection control signal Sen,
Start control signal Sc, drive signals Scon, Sm, St, Scr
1 has a function of generating Scr2 and outputting them to the fuel injection control device 68, the starter motor 70, and the corresponding solenoids. Engine 32, crushing device 3,
The purpose is to automatically start the conveyor 6 and the magnetic separator 7. The details will be described below.

FIG. 6 is a cross-sectional view of the hopper 2 and the crushing device 3 showing the time when the material to be crushed is put in the embodiment of the self-propelled crusher of the present invention. In FIG. 6, 72
Is a pair of photoelectric sensors provided at the bottom of the hopper 2, for example. This photoelectric sensor 72 is composed of a light emitting device 72a and a light receiving device 72b, which is similar to that known as this type of sensor, and is substantially horizontal in the width direction of the self-propelled crusher 1 at the bottom of the hopper 2. The light-emitting device 72a and the light-receiving device 72b are inserted into the through holes (not shown) provided so as to face each other. The light (the arrow indicated by the broken line in FIG. 6) that has reached the light receiver 72b from the light emitter 72a when the object to be crushed has not been introduced reaches the light receiver 72b while being blocked by the object to be crushed. When the light is lost, the light receiver 72b outputs a closing detection signal Sb to the drive controller 47a.

FIG. 7 is a flow chart showing the control contents related to the automatic starting function of the control functions of the drive control unit 47a which constitutes an embodiment of the self-propelled crusher of the present invention. In FIG. 7, when the key switch 41 of the operation panel 39 is set to "standby", an operation signal Sa is input from the operation panel 39, and the drive control section 47a starts this flow.

First, at step 10, the time calculator T for counting the time after the engine 32 is started is cleared to 0, and the routine goes to the next step 20.

In step 20, it is determined whether or not the material to be crushed has been put into the crushing device 3. Specifically, the detection signal Sb from the photodetector 72b of the photoelectric sensor 72 is input.
Is input. If the material to be crushed is not loaded, step 20 is repeated until it is loaded. If the material to be crushed is input, the determination is satisfied, and the routine goes to Step 30.

In step 30, the injection control signal Sen output to the fuel injection control device 68 and the start control signal Sc output to the starter motor 70 are turned on to start the engine 32.

In the next step 40, the time calculator T
1 is added to and the process proceeds to the next step 50.

In step 50, it is determined whether the time calculator T is larger than the threshold value T ₀ . The threshold value T ₀ is, for example, a predetermined value pre-recorded in an appropriate portion of the controller 47 as a time required from the start of the engine 32 until the rotational speed thereof is sufficiently stabilized (or an appropriate value). The setting may be input by external input means). Note that step 10 and step 4
0, and this step 50 may be omitted if not necessary.

In the next step 60, the magnetic selector 7 is started by turning on the drive signal Sm output to the magnetic selector valve 36. Then, the process proceeds to step 70.

In step 70, the conveyor 6 is activated by turning on the drive signal Scon output to the conveyor valve 35. Then, it moves to step 80.

In step 80, the forward drive signal Scr1 output to the solenoid drive unit 33a of the crusher control valve 33 is turned on, and the reverse drive signal Scr2 output to the solenoid drive unit 33b is turned off. The crushing device 3 is activated in the normal direction.

In the next step 90, it is determined whether the engine 32 is instructed to stop. Specifically, it is determined whether the key switch 41 of the operation panel 39 has been turned off. If the stop is not instructed, the determination is not satisfied and step 90 is repeated. If the stop is instructed, the determination is satisfied, and the routine goes to Step 100.

In step 100, the injection control signal Sen output to the fuel injection control device 68 is turned off, the engine 32 is stopped, and this flow is ended.

When it is desired to start the engine 32, the crushing device 3, the conveyor 6 and the magnetic separator 7 by manual operation instead of the automatic start as described above, "start" of the key switch 41 of the operation panel 39 described above, "Shredder forward rotation" button 4
2a, "start conveyor" button 43a, "start magnetic separator"
It can be manually activated by the button 44a.

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 first hydraulic pump 30A is a hydraulic pump that discharges pressure oil to the crusher hydraulic motor, and the photoelectric sensor 72, the light emitter 72a,
The light receiver 72b constitutes an input detecting means for detecting the input of the crushed object to the crushing device. In addition, step 20, step 30, step 80 in the flow of FIG.
The start control means for activating the engine and the crushing device in accordance with the detection result of the injection detecting means is constituted, and in particular, step 80 constitutes the valve control means for outputting a drive signal for switching the control valve for the crushing device.
Further, the fuel injection control device 68 constitutes injection control means for controlling fuel injection into the engine.

Next, the operation and action of one embodiment of the self-propelled crusher of the present invention will be described below. In the self-propelled crusher configured as described above, for example, at the start of operation in the morning, the operator “starts” the key switch 41 of the operation panel 39.
To start the engine 32. It should be noted that the key switch 41 returns to the "driving" position after the engine 32 is started and is in the driving state. Next, the operator presses the "magnetic separator start" button 44a, the "conveyor start" button 43a, and the "shredder forward rotation" button 42a, whereby the magnetic separator 7, the conveyor 6, and the crushing device 3 are pressed.
Are started in sequence and the crushing work is started.

When the operation is interrupted, for example, during lunch break, the operator presses the "shredder stop" button 42b, the "conveyor stop" button 43b, and the "magnetic separator stop" button 44b on the operation panel 39. The crushing device 3, the conveyor 6, and the magnetic separator 7 are sequentially stopped. next,
When the key switch 41 is turned off, the engine 3
After stopping No. 2, the key switch 41 is returned to "standby". This starts the flow of FIG. 7, and step 10
After that, in step 20, the self-propelled crusher 1 is in a standby state for loading the crushed object with the engine 32 stopped.

Next, when the crushing work is restarted, the operator operates a hydraulic excavator equipped with a grapple or the like, and throws the crushed object into the hopper 2. The light emitting device 72a of the photoelectric sensor 72 is caused by the thrown-in crushed material.
The light emitted toward the light receiver 72b from the
A closing detection signal Sb is output from the light receiver 72b to the drive controller 47a. As a result, the determination at step 20 in the flow of FIG. 7 is satisfied, and the engine 32 is started at step 30.

The drive time of the engine 32 is the threshold value T
_When it exceeds ₀ , the determination at step 50 in the flow of FIG. 7 is satisfied, and it is considered that the rotation speed of the engine 32 is sufficiently stable, and at the next step 60, step 70 and step 80, the magnetic separator 7, the conveyor 6 and the crushing are performed. The devices 3 are activated in this order.

As a result, the crushing work of the crushed object which has been put into the hopper 2 and detected by the photoelectric sensor 72 is started. The crushed material crushed by the crushing device 3 is dropped onto the conveyor belt 21 of the conveyor 6 below the crushing device 3 and conveyed, and the magnetic material mixed in the crushed material is removed by the magnetic separator 7 during the conveyance. Then, the sizes are made almost uniform, and finally the self-propelled crusher 1 is discharged from the rear part.

After that, every time the crushing operation of the crushed object is completed, the crushing device 3, the conveyor 6 and the magnetic separator 7 are sequentially stopped and the key switch 41 is turned off and then put into the standby state. Then, the flow of FIG. 7 is restarted, and at the time of starting the next crushing work, the engine 32 is automatically started only by putting the object to be crushed into the hopper 2, and the crushing device 3,
The conveyor 6 and the magnetic separator 7 can also be automatically started.

For example, when the self-propelled crusher 1 is mounted on the trailer and moved to another site, the key switch 41 is kept in the "off" state, so that the engine 32, the crusher 3, the conveyor 6 , And the magnetic separator 7 do not start automatically.

As described above, according to the embodiment of the self-propelled crusher of the present invention, by setting the key switch 41 to "standby", the operator operates the hydraulic excavator etc. As long as the crushed material is put into the hopper 2 of the self-propelled crusher 1, the engine 32 is automatically started, and then the magnetic separator 7, the conveyor 6, and the crusher 3 are sequentially activated to start the self-propelled crusher 1 Starts crushing work. This allows the operator to
There is no need to manually start the engine 32, the magnetic separator 7, the conveyor 6, and the crushing device 3 at the time of restarting after the operation is interrupted, and the time and effort to move from the hydraulic excavator to the driver's seat 37 of the self-propelled crusher 1 can be saved. You can Therefore, every time the crushing work is restarted, the operator has to get on the driver's seat 37 of the self-propelled crusher 1 and manually start the engine 32, the magnetic separator 7, the conveyor 6, and the crusher 3. Compared to
It is possible to greatly reduce the physical and mental burden on the operator during work. Further, this can improve the workability of the crushing work.

In the embodiment of the self-propelled crusher of the present invention described above, the automatic start-up is performed only when the operation is restarted after the interruption of operation such as lunch break, but the invention is not limited to this. It goes without saying that it may be automatically started at the start of all the crushing work including the start of the operation of.

In one embodiment of the self-propelled crusher of the present invention, the key switch 41 is provided with a "standby" position, and in the case of "standby", the engine 32, While the crushing device 3, the conveyor 6, and the magnetic separator 7 are automatically activated, in the case of "OFF", even if the input of the crushed object is detected, it is not automatically activated, but the invention is not limited to this. That is, even when the key switch 41 is "OFF", the engine 32, the crushing device 3, the conveyor 6, and the magnetic separator 7 are automatically activated at all times when the crushed object is detected to be loaded.
The "standby" position may be deleted. Also in this case, the same effect as that of the above-described embodiment of the present invention can be obtained.

In the embodiment of the self-propelled crusher of the present invention described above, the photoelectric sensor 72 is used as the loading detection means for the crushed object, but the invention is not limited to this. That is, for example, a publicly known load cell 73 as shown in FIG. 8 may be used to detect the total weight of the hopper 2 and the crushing device 3, and the loading of the crushed object may be detected based on the weight change. In this modification, the load cell 73 constitutes an input detecting means for detecting the input of the object to be crushed into the crushing device described in the claims. Also in this case, the same effect as that of the above-described embodiment of the present invention can be obtained.

[0077]

EFFECTS OF THE INVENTION According to the present invention, an operator can operate the hydraulic excavator or the like each time the crushing work is performed, by detecting the input of the crushed object into the crushing device and automatically starting the engine and the crushing device. There is no need to move to the driver's seat of the self-propelled crusher and manually start the engine and crusher.
It is possible to save the trouble of moving. As a result, the physical and mental burden on the operator can be greatly reduced.

[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 top view showing the overall structure of an embodiment of the self-propelled crusher of the present invention.

FIG. 3 is a front view seen from the direction A in FIG.

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 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. 6 is a cross-sectional view of the hopper and the crushing device showing the time when the material to be crushed is charged in the embodiment of the self-propelled crusher of the present invention.

FIG. 7 is a flowchart showing the control contents related to the automatic start-up function of the control functions of the drive control unit that constitutes an embodiment of the self-propelled crusher of the present invention.

FIG. 8 is a transverse cross-sectional view of the hopper and the crushing device showing a time when the material to be crushed is loaded in a modified example of the 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) 10 Hydraulic motor for crusher 30A 1st hydraulic pump (hydraulic pump) 32 engine 33 Control valve for shredding device 47a Drive control section (valve control means) 68 Fuel injection control device (injection control means) 72 Photoelectric sensor (closing detection means) 72a Light emitter (input detection means) 72b Light receiver (closing detection means) 73 load cell (input detection means)

   ─────────────────────────────────────────────────── ─── Continued front page    (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 (72) Inventor Kentaro Hashimoto             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory F term (reference) 4D067 DD04 DD06 EE45 EE48 GA16                       GA20

Claims (3)

[Claims] 1. A frame, a traveling means provided on the frame, a crushing device provided on the frame, a hydraulic pump for discharging pressure oil to a hydraulic motor for the crushing device for driving the crushing device, and a hydraulic pressure for the hydraulic pump. An engine that drives a pump, a loading detection unit that detects the presence of a throwing object or a loading machine into the crushing device, or a thrower or a throwing machine, and the engine according to the detection result of the throwing detection unit. A self-propelled crusher comprising: a start control means for activating the crusher. 2. The self-propelled crusher according to claim 1, wherein the start-up control means includes injection control means for controlling fuel injection into the engine. 3. The self-propelled crusher according to claim 1 or 2, wherein the start-up control means controls the flow of pressure oil from a hydraulic pump to the crusher hydraulic motor for driving the crusher. A self-propelled crusher comprising valve control means for outputting a drive signal for switching a control valve for the device.