JPH11253831A - Feeder controlling device for crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constantly and properly keep a supply quantity of rubbish to a crushing device from a feeder with the stable control. SOLUTION: The feeder controlling device is formed from a high level sensor 87a for detecting that the quantity of the rubbish supplied to a jaw-crusher is equal to or above a 1st prescribed quantity a low level sensor 87b for detecting that the quantity of the rubbish supplied to the jaw-crusher 3 is equal to or above a 2nd prescribed quantity smaller than the 1st prescribed quantity and a feeder controlling part provided in a controller 90. The feeder controlling part is for adequately calibrating and changing a driving signal Sf sent from an equipment and instrument controlling part 90b to a solenoid control valve 41 based on the rubbish detecting signal detected in the sensors 87a and 87b to control the working speed of a hydraulic motor 23 for feeder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing rocks and construction waste, and more particularly to a crusher feeder control device for controlling a feeder provided in the crusher.

[0002]

2. Description of the Related Art Crushers are used to remove various large and small rocks and construction wastes (hereinafter referred to as "gara" as appropriate) generated at construction sites.
By crushing to a predetermined size at the site before transportation, the construction is facilitated and the cost is reduced. That is, the mower thrown into a hopper provided above the crusher by a hydraulic shovel or the like is guided by a feeder provided below the hopper to a crushing device such as a swing jaw having a substantially V-shaped side cross-sectional shape. Crushed to size. The crushed glass falls from the space below the swing jaw onto a conveyor arranged below the swing jaw and is transported by the conveyor. During this transportation, a magnetic separator arranged above the conveyor adsorbs and removes, for example, reinforcing bar pieces mixed in the concrete garbage, and finally as a crushed material of almost uniform size, the front of the crusher It is carried out from.

[0003] During the above operation, it is important to control the feeder so as to perform appropriate supply in accordance with the crushing capacity and the crushing state of the crushing device, particularly when supplying waste from the feeder to the crushing device. Furthermore, at the operation site of the crusher,
In many cases, an operator of a hydraulic excavator that puts waste into a hopper without an operator dedicated to the crusher is also in charge. In such a case, the operator must operate not only the hydraulic excavator but also the crusher, so that the labor must be reduced as much as possible.

[0004] From the above point of view, a device for automatically controlling the feeder supply operation has conventionally been proposed, and a known technique is, for example, Japanese Utility Model Publication No. 5-1315. In the feeder control device disclosed in Japanese Utility Model Publication No. 5-1315, a photoelectric sensor is provided in a crushing chamber which is provided above the crushing device and introduces waste from the feeder. Is detected to overflow the crushing chamber beyond a certain height, or when a large lump of stagnation is stagnated in the crushing chamber, the operation of the feeder is stopped.

[0005]

The above-mentioned prior art has the following problems. In the feeder control device disclosed in Japanese Utility Model Publication No. 5-1315, the light-emitting device and the light-receiving device of the photoelectric sensor are provided in the crushing chamber so as to be substantially horizontally opposed to each other. Then, the light from the light emitter is cut off, and based on this, the operation of the feeder is stopped. However, in this feeder control device, the restart of the operation of the feeder stopped in this way is manually performed, and the automatic restart of the operation after the stop is not mentioned, and the feeder operation control is not performed. Insufficient attention was paid to automation. However, if the concept of the conventional feeder control device is applied, it is conceivable that the operation restart after the feeder is stopped is performed based on the non-detection state of the backlash by the photoelectric sensor. That is, the feed of the glass is stopped by the stop of the feeder, and the level of the glass retained in the crushing chamber (the height of the upper end of the glass retained body made up of a large number of the glass) decreases due to the progress of the crushing of the crushing device, and the light from the light emitting device is again emitted. Since the light is received by the light receiver, the operation of the feeder may be restarted when the light receiving state is reached.

However, in this case, as soon as the staying level of the waste falls, the feeder resumes its operation and restarts the supply of the waste. However, the start of the supply raises the staying level of the waste again and cuts off the light from the light emitter to feed the feeder. Is stopped, and thereafter, there is a possibility that an unstable control state (so-called hunting) in which the restart and stop of the feeder operation are repeated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to control the feeder of a crusher capable of always properly maintaining the amount of waste supplied from the feeder to the crusher by stable control. It is to provide a device.

[0008]

Means for Solving the Problems (1) In order to achieve the above object, the present invention provides a crushing device for crushing at least rocks and construction waste materials input from a hopper, and a crushing device using the crushing device. A crusher that is provided in a crusher having a conveyor for transporting the supplied rocks and construction waste materials and the like and a feeder for supplying the crushers with the rocks and construction waste materials input to the hopper, and controls the operation of the feeder. In the feeder control device of (1), first supply amount detection means for detecting that the amount of the rock, the construction waste material, and the like supplied to the crushing device is equal to or more than a first predetermined amount, and the rock supplied to the crushing device. A second supply amount detecting means for detecting that the amount of construction waste and the like is equal to or greater than a second predetermined amount smaller than the first predetermined amount; a detection signal of the first supply amount detecting means and a second supply amount detecting means Detection signal Depending on the preparative, and a speed control means for controlling the operating speed of the feeder. For the purpose of always maintaining the feed amount from the feeder to the crushing device properly, one detecting means is provided to detect whether the feed amount is equal to or more than a predetermined amount, and the operation of the feeder is controlled based on this detection signal. If the supply amount exceeds a predetermined amount and the feeder is stopped, the supply amount will decrease and the oversupply state will be resolved and the feeder operation will resume again, or immediately after the return, the supply amount will increase and the feeder will return to the oversupply state and return to the oversupply state again. The operation may stop, or an unstable control state (so-called hunting) in which the feeder stops and the operation starts may be repeated. In the present invention, in addition to detecting by the first supply amount detecting means that the amount of rock, construction waste, and the like is equal to or more than the first predetermined amount,
The second predetermined amount is smaller than the first predetermined amount.
The feed amount is detected by the supply amount detection means, and the feeder operation speed is controlled by the speed control means according to both of the detection signals. As a result, even if the oversupply state in which the supply amount is equal to or more than the first predetermined amount is resolved, the feeder operation is not immediately restored, and the supply amount is reduced to the first supply amount.
Since the operation of the feeder can be resumed after waiting for the amount to be less than the second predetermined amount, which is smaller than the predetermined amount, stability in control can be improved.

(2) In the above (1), preferably,
The speed control unit reduces or stops the operation of the feeder when the first supply amount detection unit detects that the supply amount of the rock, the construction waste material, or the like is equal to or more than a first predetermined amount. Deceleration / stop signal output means for outputting a signal, and after the operation of the feeder is decelerated or stopped by a signal from the deceleration / stop signal output means, the second supply amount detection means supplies the rock / construction waste material or the like. And a return signal output means for outputting a signal for returning the operation of the feeder to a state before deceleration or stop when the amount is no longer detected to be equal to or more than the second predetermined amount.

(3) In the above (2), more preferably, the deceleration / stop signal output means supplies the rock, construction waste, or the like at the first supply amount detection means at a first predetermined amount or more. If the state in which the operation is detected continues for a predetermined period, a signal for decelerating or stopping the operation of the feeder is output. Thereby, control stability can be further improved.

(4) In the above (2), preferably, the return signal output means is such that the supply amount of the rock, the construction waste material or the like is equal to or more than a second predetermined amount by the second supply amount detection means. If the undetected state continues for a predetermined period,
A signal is output to return the operation of the feeder to a state before deceleration or stop. Thereby, control stability can be further improved.

(5) In the above (1), preferably, the first supply amount detecting means is provided on a side plate of the crushing device or an upper chute above the crushing device, and is provided at an uppermost portion of rock, construction waste, or the like. An upper sensor for detecting a position, wherein the second supply amount detecting means is provided on a side plate of the crusher or an upper chute above the crusher so as to be located below the upper sensor; A lower sensor for detecting the uppermost position of the waste material or the like is provided.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a hydraulic circuit diagram of a hydraulic drive device provided with a feeder control device according to the present embodiment, and FIG. 2 is a side view illustrating an entire structure of a self-propelled crusher to which the feeder control device is applied. , FIG. 3 is FIG.
It is the side view which showed the internal structure in the state which removed some side members in the inside, and FIG. 4 is a figure showing the operation state during crushing work.

In FIG. 2 to FIG. 4, the self-propelled crusher 1 generally includes rocks, construction wastes, etc., which are crushed objects (workpieces) by a work tool such as a bucket of a hydraulic shovel.
The hopper 2 into which the 5A is inserted, the jaw crusher 3 as a crushing device for crushing the inserted gala 5A into a predetermined size having a substantially V-shaped cross-sectional shape, and the jaw crusher 3 as the crusher 3A input from the hopper 2. Feeder 4, leading to
A conveyor 6 for transporting the scraps 5B crushed and reduced by the jaw crusher 3 to the front of the crusher 1, and a scraper 5B provided above the conveyor 6 and transported on the conveyor 6.
And a left and right crawler belts 9L and 9R provided below the crusher main body 8 (but viewed from the driver's seat 17). (Only the left side is shown).

The jaw crusher 3 is connected to a lower traveling body 10 by a frame 11 provided on the crusher main body 8.
As shown in FIG. 4, the moving teeth 3a are swung back and forth with respect to the fixed teeth 3b by a driving force generated by a hydraulic motor 24 (described later), and the
Is crushed to a predetermined size. The feeder 4 is provided below the hopper 2 and has a base 12 on which the waste 5A put into the hopper 2 is mounted, and a known horizontal reciprocating movement of the base 12 by a driving force generated by a hydraulic motor 23 (described later). And a base drive mechanism 13. The conveyor 6 drives the belt 14 by a hydraulic motor 25 (same as above), and thereby transports the waste 5B that has fallen onto the belt 14 from the jaw crusher 3. The magnetic separator 7 drives the belt 15 disposed above the belt 14 of the conveyor 6 so as to be substantially orthogonal to the belt 14 around a magnetic force generating means (not shown) by a hydraulic motor 26 so that the magnetic force is generated from the magnetic force generating means. The magnetic force acts on the belt 15 through the
Then, the conveyor 6 is transported in a direction substantially perpendicular to the belt 14 and dropped to the side of the belt 14. The crawler tracks 9L and 9R are respectively provided on the lower traveling body 10
And between the drive wheels 16L and 16R (only the left side is shown) and the idlers 18L and 18R (the same), and the left and right hydraulic pressures for traveling provided on the drive wheels 16L and 16R are provided. Motors 28L, 28R (only shown in FIG. 1)
The crusher 1 is made to travel by applying a driving force to the crusher 1. An operator's driver's seat 17 is provided on the crusher main body 8.
An operation panel 38 (see FIG. 5, described later) is installed in the control panel.

At the time of the crushing operation, as shown in FIG. 4, the waste 5A put into the hopper 2 is guided to the jaw crusher 3 by the feeder 4 below the hopper 2 and crushed to a predetermined size. The crushed waste 5B falls from the space below the jaw crusher 3 onto the conveyor 6 and is transported. During the transportation, the magnetic material mixed into the waste 5B by the magnetic separator 7 (for example, a reinforcing steel mixed into the concrete waste). Pieces) are removed, and are finally carried out from the front part of the crusher 1 as crushed materials of almost the same size.

The hydraulic drive device shown in FIG. 1 is provided in the above-mentioned self-propelled crusher 1, and includes an engine 19 as a prime mover and a variable displacement first hydraulic pump 20 driven by the engine 19. And the second hydraulic pump 21
And a fixed displacement pilot pump 22 also driven by the engine 19, and the first and second hydraulic pumps 2
Six hydraulic motors 23, 24, 25, 26, 28L, 28R to which pressure oil discharged from 0, 21 is respectively supplied.
And four control valves 29, 30, 31, 3 for controlling the direction and flow rate of the hydraulic oil supplied from the first and second hydraulic pumps 20, 21 to the hydraulic motors 23 to 28.
2, left and right running control lever devices 33, 34 for switching left and right running control valves 30, 31 (described later) using the pilot pressure generated by the pilot pump 22, and the pilot pump 22. The control pressure based on the pilot pressure obtained is derived, and the first and second
The operator instructs the regulators 104 and 105 for adjusting the discharge flow rates of the hydraulic pumps 20 and 21 and the start / stop of the jaw crusher 3, the feeder 4, the conveyor 6, and the magnetic separator 7 provided in the driver's seat 17 of the crusher main body. It has the operation panel 38 for inputting.

The six hydraulic motors 23 to 28 include the feeder hydraulic motor 23 for generating a driving force for operating the feeder 4, the crushing hydraulic motor 24 for generating a driving force for operating the jaw crusher 3, and the operation of the conveyor 6. Conveyor hydraulic motor 25 for generating a driving force for driving the magnetic separation machine 7, hydraulic motor 26 for generating a driving force for operating the magnetic separator 7, and the left motor for generating a driving force to the left and right crawler tracks 9L and 9R.・
The right running hydraulic motors 28L and 28R are formed.

Each of the control valves 29 to 32 is a center bypass type switching valve, and includes a crushing control valve 29 connected to a crushing hydraulic motor 24 and the left running hydraulic motor 28L connected to a left running hydraulic motor 28L. For a light load device connected to the control valve 30, the right traveling control valve 31 connected to the right traveling hydraulic motor 28R, the feeder hydraulic motor 23, the conveyor hydraulic motor 25, and the magnetic separator hydraulic motor 26. And a control valve 32. At this time, throttles 100 and 101 are provided on conduits 109 and 110 for connecting the control valve 30 and the control valve 32 to the tank 69, respectively. Pressure sensors 102 and 103 for detecting pressures (negative control pressures P1 'and P2') generated by the pressure sensors are provided. Here, as described above, the control valves 29 to 32 are center bypass type valves, and the flow rate flowing through the center bypass pipe changes depending on the operation amount of each of the control valves 29 to 32. When each of the control valves 29 to 32 is neutral, that is, when the required flow rate to the hydraulic pumps 20 and 21 is small, most of the hydraulic oil discharged from the first hydraulic pump 20 and the second hydraulic pump 21 ,
Since it flows to 110, the negative control pressures P1 'and P2' increase. Conversely, when each of the control valves 29 to 32 is operated to be opened, that is, when the hydraulic pumps 20 and 21 are opened.
When the required flow rate is large, the flow rate flowing through the pipelines 109 and 110 is reduced by the flow rate flowing toward the actuator side, so that the negative control pressures P1 'and P2' decrease. In the present embodiment, as described later, the pressure sensor 102,
The swash plate 20 of the first and second hydraulic pumps 20 and 21 based on the fluctuations of the negative control pressures P1 'and P2'
The tilt angles of A and 21A are controlled (details will be described later).

The first hydraulic pump 20 of the first and second hydraulic pumps 20 and 21 is a crushing control valve 2.
The pressure oil for supplying to the crushing hydraulic motor 24 and the left traveling motor 28L is discharged through the control valve 9 and the left traveling control valve 30. At this time, the crushing control valve 29 and the left traveling control valve 3
0 is connected in parallel with each other. On the other hand, the second hydraulic pump 21 supplies the right traveling motor 28R, the feeder hydraulic motor 23, the conveyor hydraulic motor 25, and the magnetic separator hydraulic motor 26 via the right traveling control valve 31 and the light load device control valve 32. Pressure oil is discharged. At this time, the control valve 32 for the light load device and the control valve 31 for the right running are connected in parallel with each other.

The supply of hydraulic oil from the second hydraulic pump 21 to the feeder hydraulic motor 23, the conveyor hydraulic motor 25, and the magnetic separator hydraulic motor 26 via the light load device control valve 32 will be described. 2
Three solenoid control valves 39, 40, 41 are provided for controlling the flow rates of the pressure oil supplied to 3, 25, 26, respectively, and these are connected in parallel with each other.
Correspondingly, pressure compensating valves 42, 43, and 44 (described later) are provided, respectively. Solenoid control valve 3
9, 40 and 41 are driving signals S from the controller 90.
m, Sco, and Sf (described later).
Variable throttles 39A, 40A, 41A that control the flow rate of the pressure oil supplied to the hydraulic motors 23, 25, 26 according to the opening degree
Are provided respectively. These solenoid control valves 3
When the drive signals Sm, Sco, Sf are turned on, the switches 9, 40, 41 are respectively switched to the communicating position (the lower position in FIG. 1), from the second hydraulic pump 21 to the light load device control valve 32 and the introduction line 53. Pressure oil led through
It supplies to and drives the corresponding hydraulic motors 23, 25, 26, respectively. Further, the drive signals Sm, Sco, Sf are OF
When the pressure reaches F, the springs 39B, 40B, and 41B return to the shut-off positions (upper positions in FIG. 1) with the restoring force, and the supply of the hydraulic oil from the second hydraulic pump 21 to the corresponding hydraulic motors 23, 25, and 26 is interrupted. And these hydraulic motors 2
3, 25, and 26 are connected to the lead-out line 54 to connect the hydraulic motor 2
The drive of 3, 25, 26 is stopped. Also, the variable throttle 39 of the solenoid control valves 39, 40, 41
Hydraulic motors 23, 2 downstream of A, 40A, 41A
Load detection line 4 for detecting load pressure of 5, 26
5, 46 and 48 are respectively connected. Among these, the load detection lines 46 and 48 are further connected to a load detection line 50 via a shuttle valve 49, and the load pressure on the high pressure side selected via the shuttle valve 49 is guided to the load detection line 50. It has become. In addition, the load detection line 50
The load detection line 45 is connected to the maximum load detection line 52 via the shuttle valve 51, and the load pressure on the high pressure side selected by the shuttle valve 51 is guided to the maximum load detection line 52 as the maximum load pressure. It has become. On the other hand, the load pressure detected by the load detection lines 45, 46, 48 is transmitted to one side of the corresponding pressure compensating valves 42, 43, 44 as the outlet pressure of each of the solenoid control valves 39, 40, 41. The pressure upstream of the solenoid control valves 39, 40, 41 is led to the other side of the pressure compensating valves 42, 43, 44, whereby the pressure compensating valves 42, 43, 44 are controlled by the solenoid control valves 39, 40. , 41 variable aperture 39A, 4
It operates in response to the differential pressure between 0A and 41A, and operates from the light load device control valve 32 to the feeder hydraulic motor 2.
3. Variable throttles 39A, 40A regardless of changes in the pressure in the introduction pipe 53 for introducing pressure oil to the hydraulic motor 25 for the conveyor and the hydraulic motor 26 for the magnetic separator and the load pressure of the hydraulic motors 23, 25, 26. , 41A can be maintained constant, and a flow rate corresponding to the degree of opening of the solenoid control valves 39, 40, 41 can be supplied to the corresponding hydraulic motor. In addition, the above-described introduction pipe 53 and the hydraulic motor 2
A pressure control valve 56 is provided in a pipe 55 that directly connects the outlet pipe 54 that guides the pressure oil discharged from 3, 25, and 26 to the control valve 32 for light load equipment. The maximum load pressure is guided to one side of the pressure control valve 56 via the above-described maximum load detection pipe 52, and the pressure in the upstream pipe 55 is connected to the other side of the pressure control valve 56. Has been led. Thus, the pressure control valve 56 increases the pressure in the downstream pipe line 55 by the set pressure of the spring from the maximum load pressure.

The control valve 29 for crushing,
Each of the right traveling control valves 30 and 31 and the light load device control valve 32 is a pilot operation valve that is operated using the pilot pressure generated by the pilot pump 22. Control valve for crushing 2
9 is connected to the pilot lines 5
Pilot pressures from the pilot pump 22 are guided through 8, 59, respectively. These pilot lines 58,
The 59 is provided with a solenoid control valve 60 driven by a drive signal Scr from a controller 90. The solenoid control valve 60 is switched in response to the input of the drive signal Scr, and changes the pilot pressure to the pilot lines 58 and 5.
Nine. That is, when the drive signal Scr is turned ON, the solenoid control valve 60 is switched to the communication position, that is, the right position (or the left position) in FIG. 1, and the pilot pressure from the pilot pump 22 is applied to the pilot line 58 (or 59). Drive unit 29a (or 29b)
The crushing control valve 29 is thereby switched to the upper position (or lower position) in FIG. 1, and the crushing hydraulic motor 24 is driven in the forward (or reverse) direction. When the drive signal Scr is turned off, the solenoid control valve 60 is in the neutral position, shuts off the pilot pressure from the control valve 22, and sets the pilot line 58
And 59 are connected to a tank 69 so that their pressure equals the tank pressure. Thereby, the crushing control valve 29 returns to the neutral position, and the crushing hydraulic motor 24 stops. The left and right traveling control valves 30 and 31 are operated by pilot pressure generated by the pilot pump 22 and reduced to a predetermined pressure by operation lever devices 33 and 34. That is, the operation lever device 3
Each of the control levers 3 and 34 includes operation levers 33a and 34a and pressure reducing valves 33b and 34b that output a pilot pressure according to the operation amounts of the operation levers 33a and 34a. When the operation lever 33a of the operation lever device 33 is operated in the direction a (or the opposite direction) in FIG. 1, the pilot pressure causes the driving portion 30a (or the driving unit 30a (or the driving unit 30a) of the control valve 30 for the left traveling to pass through the pilot line 61 (or 62). 30b), whereby the left traveling control valve 30 is switched to the upper position (or lower position) in FIG. 1, and the left traveling hydraulic motor 28L is driven in the forward (or reverse) direction. Similarly, the operation lever 34a of the operation lever device 34 is
When operated in the direction (or the opposite direction), the pilot pressure is guided to the drive unit 31a (or 31b) of the right travel control valve 31, and the pilot pressure is moved to the upper position (or lower position) in FIG.
And the right traveling hydraulic motor 28R is driven in the forward (or reverse) direction. The light-load device control valve 32 includes a drive unit 32a,
The pilot pressure from the pilot pump 22 is led to the pilot line 32b via the pilot lines 65 and 66, respectively.
Like the pilot lines 58 and 59 of the crushing control valve 29, the pilot lines 65 and 66 are provided with a solenoid control valve 68 that can be switched by a drive signal Sl (described later) from a controller 90. That is, when the drive signal Sl is turned on, the solenoid control valve 68 is switched to the communication position (the right position in FIG. 1), and the pilot pressure from the pilot pump 22 is changed to the pilot line 65.
To the drive unit 32a through which the control valve 32 for the light-load device is in the shut-off position (upper position in FIG. 1).
To supply hydraulic oil from the second hydraulic pump 21 to an introduction pipe 53 that introduces hydraulic oil to the feeder hydraulic motor 23, the conveyor hydraulic motor 25, and the magnetic separator hydraulic motor 26. When the drive signal Sl is turned off, the spring 6
With the restoring force of 8A, the solenoid control valve 68 returns to the left position in FIG. 1, shuts off the pilot pressure from the control valve 22, connects the pilot lines 65 and 66 to the tank 69, and reduces the pressure to the tank pressure. Equal to Thereby, the control valve 32 for the light load device is
Returns to the neutral position.

The regulators 104 and 105 have cylinders 35 and 36 for input torque limit control, and cylinders 107 and 109 for negative control. These cylinders 35, 36, 107, and 109 have pistons 35A, 36A, 107A, and 109A, respectively. When the pistons 35A, 36A, 107A, and 109A move rightward in FIG. Hydraulic pumps 20, 20 so that the discharge flow from
The tilt angles (ie, pump displacement volumes) of the swash plates 20A, 21A of the piston 21 are changed, and the pistons 35A, 36A, 107
A and 109A move to the left in FIG.
The tilt angles of the swash plates 20A, 21A are changed so that the discharge flow rates from the hydraulic pumps 20, 21 increase. On the bottom side of the cylinders 35, 36, 107, 109, a control pressure based on the pilot pressure from the pilot pump 22 is applied to the pilot lines 70a, 71a, 70.
When the control pressure is high, the pistons 35A, 36A, 107A, and 109A move rightward in FIG. 1 to cause the first and second hydraulic pumps 20, 2 to move.
When the control flow is low and the control pressure is low, the pistons 35A, 36A, 107A and 109A move to the left in FIG. 1 to increase the discharge flow. At this time, the cylinders 35, 36, 1
07, 109 to pilot lines 70a, 71a, 70
b and 71b include the drive signal S from the controller 90.
Solenoid control valves 72, 73, 106, and 108 driven by 1, S2, S3, and S4 (described later) are provided, and these solenoid control valves 72, 73, 106, and
108 connects the pilot pipelines 70a, 71a, 70b, 71b in accordance with the output current values of the drive signals S1, S2, S3, S4. That is, the solenoid control valves 72, 73,
The control pressures supplied to the cylinders 35, 36, 107, 109 are increased by connecting the pilot pipelines 70a, 71a, 70b, 71b with a larger opening degree as the output current value increases, and the output current value increases. Becomes zero, the pilot lines 70a, 71a, 70b, 71b are shut off, and the control pressure supplied to the cylinders 35, 36, 107, 109 becomes zero.

For the solenoid control valves 72 and 73 related to the input torque limiting control cylinders 35 and 36, the controller 90 controls the discharge pressures P1 and P1 of the first and second hydraulic pumps 20 and 21 as described later. The output current value of the drive signals S1 and S2 increases as P2 increases. Thereby, the first and second hydraulic pumps 20, 2
When the first discharge pressures P1 and P2 exceed a predetermined pressure, the discharge flow rates of the first and second hydraulic pumps 20 and 21 are limited, and the load of the first and second hydraulic pumps 20 and 21 reduces the output torque of the engine 19. The tilting of the swash plates 20A and 21A is controlled so as not to exceed (the known input torque limiting control).

On the other hand, the negative control cylinder 106,
The following control is performed for the solenoid control valves 107 and 109 related to 108. That is, when the negative control pressures P1 and P2 detected by the pressure sensors 102 and 103 are high, the controller 90 decreases the output current values of the drive signals S3 and S4 for the solenoid control valves 106 and 108 as described later. On the other hand, when the negative control pressures P1 and P2 are low, the solenoid control valve 10
The output current value to 6,108 is increased. This allows
As the required flow rate to the first and second hydraulic pumps 20 and 21 decreases, the discharge flow rate of the first and second hydraulic pumps 20 and 21 decreases, and as the required flow rate to the first and second hydraulic pumps 20 and 21 increases, The so-called negative control for increasing the discharge flow rates of the first and second hydraulic pumps 20 and 21 is performed.

The three hydraulic pumps 20, 21, 22
Are provided with relief valves (not shown), respectively, and the first and second hydraulic pumps 20, 21
Is detected by pressure sensors 78 and 79 provided in a pipe branching from the discharge pipe, and a detection signal is input to the controller 90.

FIG. 5 shows the detailed structure of the operation panel 38. The "interlock mode" for starting and stopping the jaw crusher 3, the feeder 4, the conveyor 6, and the magnetic separator 7 in association with each other, Dial-type mode selection switch 80 for selecting a “single-action mode” for starting and stopping the motor independently of each other, and a start / stop target when the single-action mode is selected with the mode selection switch 80 Dial-type device selection switch 81 for selecting a device to be set
Mode selection switch 80 and device selection switch 81
, A start button 82 and a stop button 83 that can be used in common regardless of which is selected.

FIG. 6 shows the function of the controller 90, which includes a pump control unit 90a, a device control unit 90b, a negative control unit 90c, and a feeder control unit 90d.

The pump controller 90a includes a function generator 90a
1, 90a2, and these function generators 90a1,
90a2 is a pressure sensor 7 based on the illustrated table.
The first and second hydraulic pumps 20,2 detected at 8,79
The drive signal S to the solenoid control valves 72 and 73 for performing the input torque limiting control in accordance with the first discharge pressures P1 and P2.
1, S2 is generated.

The negative control unit 90c includes a function generator 90
c1 and 90c2, and these function generators 90c
1, 90c2 is a pressure sensor 1 based on the illustrated table.
Drive signals S to the solenoid control valves 106 and 108 according to the negative control pressures P1 'and P2' detected at 02 and 103, respectively.
3. Generates S4.

The device control unit 90b generates the drive signals Sm, Sco, Sf, Scr, and Sl based on the operation signals of the operation panel 38, and the corresponding solenoid control valves 39, 40, 41,
Output them to 60 and 68. That is, when the "running mode" is selected by the mode selection switch 80 of the operation panel, the drive signals Sf, Scr, Sco, and Sm of the solenoid control valves 41, 60, 40, and 39 are sequentially turned off, and the feeder 4, Jaw crusher 3, conveyor 6, and magnetic separator 7
Are sequentially stopped, the drive signal Sl of the solenoid control valve 68 is turned off, and the control valve 3 for the light load device is turned off.
2 to the neutral position, and the feeder hydraulic motor 23,
Conveyor hydraulic motor 25 and magnetic separator hydraulic motor 2
6 cannot be driven. Then, the drive signal St of the solenoid control valve 64 is turned on to switch to the communication position, and the operation of the control valves 30, 31 by the operation lever devices 33, 34 is enabled. When the “single-acting mode” is selected by the mode selection switch 80 on the operation panel, the drive signal St of the solenoid control valve 64 is turned off to return to the shut-off position, and the control valve for traveling by the operation lever devices 33 and 34 is used. Operation of 30, 30 is made impossible. Further, the control signal 32 for the light load device is switched by turning on the drive signal Sl of the solenoid control valve 68 to supply the pressure oil from the second hydraulic pump 21 to the introduction line 53. Thereafter, the device selection switch 81 of the operation panel 38
When any one of the jaw crusher, feeder, conveyor, and magnetic separator is selected and the start button 82 is turned on, the solenoid control valves 60, 41, 40, and 3 are correspondingly operated.
9, the drive signals Scr, Sf, Sco, Sm are turned ON, and the corresponding hydraulic motors 24, 23, 25, 26 are driven to start the respective devices. On the other hand, when the stop button 83 is turned on, the drive signals Scr, Sf, Sco, Sm of the solenoid control valves 60, 41, 40, 39 are turned off in accordance with the selection of the device selection switch 81 at that time, The corresponding hydraulic motors 24, 23, 25, 26 are stopped, and each device is stopped. "Interlocked mode" with the mode selection switch 80 on the operation panel
Is selected, as described above, the solenoid control valve 6
8 to turn on the drive signal Sl and supply the pressure oil from the second hydraulic pump 21 to the introduction pipe 53, and then drive the drive signals Sm, Sco, Scr, of the solenoid control valves 39, 40, 60, 41.
Sf is sequentially turned on in this order to turn on the hydraulic motor 2 for the magnetic separator.
6, hydraulic motor 25 for conveyor, hydraulic motor 2 for crushing
4. The feeder hydraulic motor 23 is sequentially driven to start all the devices in the order of the magnetic separator 7, the conveyor 6, the jaw crusher 3, and the feeder 4. On the other hand, when the stop button 83 is turned on, the solenoid control valves 41, 60,
These are sequentially turned OFF in the order of the drive signals Sf, Scr, Sco, Sm of 40, 39, and the feeder 4, the jaw crusher 3, the conveyor 6, and the magnetic separator 7 are sequentially stopped in this order.

The above-described hydraulic drive device is provided with the feeder control device according to the present embodiment. The feeder control device includes a high-level sensor (photoelectric sensor) 87a (see FIG. 1 and FIG. 7 described later) that detects that the amount of looseness supplied to the jaw crusher 3 is equal to or greater than a first predetermined amount.
A low-level sensor (photoelectric sensor) 87b (same) for detecting that the amount of looseness supplied to the jaw crusher 3 is equal to or more than a second predetermined amount smaller than the first predetermined amount, and the feeder control provided in the controller 90 A portion 90d (see FIG. 6) is formed.

The installation positions of the high level sensor 87a and the low level sensor 87b will be described with reference to FIG. FIG. 7 is an enlarged view showing the structure near the jaw crusher 3, and is a view substantially corresponding to the above-mentioned A portion in FIG. 3 and B portion in FIG. In FIG. 7, the high-level sensor 87a
Are inserted and arranged in a through hole formed in an upper chute 88 above the jaw crusher 3, and the low level sensor 87 b is inserted and arranged in a through hole provided in the side plate 3 c of the jaw crusher 3. These sensors 87a, 87
b is provided so that, for example, a light-emitting device and a light-receiving device are substantially horizontally opposed to each other as in a known sensor of this type, and the level of the uppermost portion of the glass 5A rises according to the amount of the glass supplied. When the light comes, the light from the light emitter is cut off and does not reach the light receiver, whereby it is detected that the supply amount of the glass 5A has reached the level of the installation position. The detection signals X1, X2 of these sensors 87a, 87b are input to the feeder control unit 90d.

Returning to FIG. 6, the feeder control section 90d starts a control function when the drive signal Sf of the solenoid control valve 41 is turned on by the equipment control section 90b, and is detected by the sensors 87a and 87b. The drive signal Sf from the device control unit 90b to the solenoid control valve 41 is appropriately corrected and changed based on the detected backlash detection signals X1 and X2, and the operation speed of the feeder hydraulic motor 23 is controlled. FIG. 8 is a flowchart showing the control contents. In FIG. 8, when the drive signal of the solenoid control valve 41 is turned ON by the device control unit 90b, this flow starts. First, in step 100, the flag is initialized to 0. This flag is used as an index indicating whether or not the feeder 4 is once decelerated / stopped by deceleration / stop control described later.

Next, at step 110, the backlash detection signal X1 detected by the high level sensor 87a is input. Then, in step 120, it is determined whether or not the glass detection signal X1 input in step 110 is an ON signal (that is, a signal indicating that the uppermost part of the glass has reached the same high level as the installation position of the sensor 87a). . Gala detection signal X
If 1 is an OFF signal (a signal indicating that the top of the gala has not reached a high level), this determination is not satisfied,
It is determined that the jaw crusher 3 is not in the excessive supply state of the waste, and the process proceeds to step 130. In step 130, it is determined whether or not the flag is 0. If the feeder 4 is not in the deceleration / stop state, the flag is 0.
When this determination is satisfied, the process returns to step 110, and the same procedure is repeated until the mottle reaches a high level.

(1) When the glass reaches a high level and becomes oversupplied While the steps 110 to 130 are repeated as described above, the glass detection signal X1 indicates that the uppermost part of the glass is the sensor 87a. If the ON signal indicates that the level has reached the same high level as the installation position (that is, if the jaw crusher 3 is in an oversupply state of looseness), step 1 is executed.
The determination at 20 is satisfied, and the routine proceeds to step 140.

At step 140, it is determined whether or not the oversupply state has continued for a predetermined time. If the predetermined time has not yet elapsed, the determination is not satisfied and step 11
Returning to 0, the same procedure is repeated, and if it has continued for a predetermined time, the process proceeds to step 150.

Thereafter, in step 150, the operation speed of the feeder 4 is reduced or stopped. Specifically, the ON signal of the drive signal Sf input from the device control unit 90b is replaced with an OFF signal, the solenoid control valve 41 is switched to the shut-off position, and the feeder hydraulic motor 23 is stopped, or the drive signal Sf Is gradually reduced to gradually return the solenoid control valve 41 to the shut-off position, and the feeder hydraulic motor 23 is operated at an extremely low speed close to stop.

In step 160, the flag is reset to 1 indicating that the feeder 4 has once decelerated and stopped.
Return to step 110.

(2) In the case where the waste is lower than the high level and the oversupply state has been resolved, while the steps 110 to 160 are repeated in the oversupply state as in the above (1), the level of the waste becomes the sensor 87a. If the over-supply state of the jaw crusher 3 is resolved by lowering the same high level (that is, if X1 becomes an OFF signal), steps 120 and 13 are executed.
The determination of 0 is not satisfied, and the routine proceeds to step 170.

In step 170, the low level sensor 87
The gala detection signal X2 detected at b is input. afterwards,
Move to step 180.

In step 180, it is determined whether or not the glass detection signal X2 input in step 170 is an ON signal (that is, a signal indicating that the uppermost part of the glass is at or above the same low level as the installation position of the sensor 87b). . Immediately after the oversupply state has been resolved and the level of the waste begins to drop, the top of the waste is still higher than the installation position of the sensor 87b,
The low-level glass detection signal X2 is an ON signal (a signal indicating that the uppermost part of the glass has reached the low level).
And returns to step 110 to repeat the same procedure.

Then, step 110 is performed as described above.
During the repetition of Step 160, the level of the glass is further reduced, and the glass detection signal X2 becomes an OFF signal indicating that the uppermost part of the glass is less than the same low level as the installation position of the sensor 87b. If so, step 180
Is not satisfied, and the routine goes to Step 190.

In step 190, it is determined whether or not the state below the low level has continued for a predetermined time. If the predetermined time has not yet elapsed, the determination is not satisfied and the routine returns to step 110 to repeat the same procedure. If the predetermined time has elapsed, the routine proceeds to step 200.

Thereafter, in step 200, the operation speed of the feeder 4 is reduced or returned to the state before the stop. Specifically, the drive signal S input from the device control unit 90b
f is output as an ON signal to the solenoid control valve 41, the solenoid control valve 41 is switched to the original position, and the feeder hydraulic motor 23 is returned to the original operation speed.

Then, in step 210, the flag is reset to 0, and the process returns to step 110.

In the above, the high-level sensor 87
a constitutes an upper sensor provided on the side plate of the crusher or on the upper chute above the crusher to detect the uppermost position of rocks, construction waste materials, etc., and this and step 110 executed by the feeder controller 90d of the controller 90; Constitutes first supply amount detecting means for detecting that the amount of rock, construction waste material, and the like supplied to the crushing device is equal to or more than a first predetermined amount. Further, the low-level sensor 87b is provided on the side plate of the crusher or on the upper chute above the crusher so as to be located below the upper sensor, and constitutes a lower sensor for detecting the uppermost position of rock, construction waste, and the like. And feeder control unit 90d
The step 170 executed by the step (a) constitutes a second supply amount detecting means for detecting that the amount of the rock, the construction waste material and the like supplied to the crushing device is equal to or more than a second predetermined amount smaller than the first predetermined amount. Steps 120, 140, 150, 180, 190 and 200 executed by the feeder control unit 90d are the first
Speed control means for controlling the operation speed of the feeder in accordance with the detection signal of the supply amount detection means and the detection signal of the second supply amount detection means is provided. Among them, steps 140 and 150 decelerate or stop the operation of the feeder when the first supply amount detecting means detects that the supply amount of rocks, construction wastes and the like is equal to or more than the first predetermined amount. A deceleration / stop signal output means for outputting a signal to cause the feeder operation to be decelerated or stopped by the signal from the deceleration / stop signal output means, and then the step 190 and the step 200 are executed by the second supply amount detection means. A return signal output means for outputting a signal for decelerating the operation of the feeder or returning to the state before the stop when the supply amount of the construction waste material or the like is no longer detected to be equal to or more than the second predetermined amount;

The operation and operation of the embodiment constructed as described above will be described below.

At the time of the crushing operation, all devices are started in the interlock mode or the single action mode.

When starting all devices in the interlock mode, the operator operates the mode selection switch 8 on the operation panel 38.
Set 0 to “interlock” and press the start button 82. Thereby, the magnetic separator 7, the conveyor 6, the jaw crusher 3, and the feeder 4 can be sequentially started in this order. When starting all devices in single-acting mode, the operator
The procedure of setting the mode selection switch 80 of the operation panel 38 to "single action" and then pressing the start button 82 in accordance with the device to be started by the device selection switch 81 is performed by the magnetic separator 7, the conveyor 6, the jaw crusher 3, and the feeder 4. The order is as follows.
Thus, as described above, the magnetic separator 7, the conveyor 6, the jaw crusher 3, and the feeder 4 can be started in this order.

In such a crushing operation, the waste 5A put into the hopper 2 is guided to the jaw crusher 3 by the feeder 4 and crushed to a predetermined size. Here, for the purpose of always maintaining the amount of loose feed from the feeder 4 to the jaw crusher 3 properly, one detecting means for detecting whether or not the amount of supply is equal to or more than a predetermined amount is provided.
When the operation of the feeder 4 is controlled based on the detection signal, when the supply amount becomes equal to or more than a predetermined amount and the feeder 4 is stopped, the supply amount is reduced, the oversupply state is eliminated, and the operation of the feeder 4 is restored or resumed. Immediately after that, the supply amount increases and the supply state becomes excessive, so that the operation of the feeder 4 may be stopped again, or an unstable control state (so-called hunting) in which the feeder stops and the operation starts may be repeated. In the present embodiment, an ON signal of the high-level sensor 87a for detecting that the amount of the glass 5A is equal to or more than the first predetermined amount and a low-level sensor for detecting that the amount of the waste 5A is equal to or more than the second predetermined amount smaller than the first predetermined amount. 87b ON signal is used. Then, the feeder operation speed is controlled by the feeder control unit 90d in accordance with both of these signals, and even if the oversupply state in which the supply amount is equal to or more than the first predetermined amount is resolved, the feeder operation is not immediately restored. After it is detected that the supply amount is less than the second predetermined amount, which is smaller than the first predetermined amount, the operation of the feeder 4 is returned in steps 190 and 200. As a result, hunting in which the feeder is stopped and the operation is started repeatedly as described above can be prevented, and control stability can be improved. Also, in step 120, even if it is detected from the ON signal of the high-level sensor 87a that the amount of waste 5A is equal to or more than the first predetermined amount,
By not stopping the feeder 4 immediately but checking the continuation of the ON signal for a predetermined time in step 140 and then stopping the feeder 4, the control stability can be further improved.
Similarly, in step 180, even if it is detected by the OFF signal of the low level sensor 87b that the amount of the waste 5A is less than the second predetermined amount, the feeder 4
Is restored, the feeder 4 is returned after confirming the continuation of the OFF signal for a predetermined time in step 190, whereby the control stability can be further improved.

As described above, according to this embodiment, the jaw crusher 3 is fed from the feeder 4 with stable control.
The supply amount of the waste 5A can always be appropriately maintained.

In the above embodiment, the high-level sensor 87a is inserted into the through-hole formed in the upper chute 88 above the jaw crusher 3, and the low-level sensor 87b is provided on the side plate 3c of the jaw crusher 3. Although they are inserted and arranged in the holes, the present invention is not limited thereto, and both may be provided on the upper chute 88 or both may be provided on the side plate 3c of the jaw crusher 3. In short, as long as the vertical relationship between the two is maintained, it is sufficient that the positions in the respective height directions are appropriately set in accordance with the crushing performance characteristics of the jaw crusher 3 and the material of the crushed glass, and in these cases, A similar effect is obtained.

Further, in the above-described embodiment, the crushing apparatus provided with the jaw crusher 3 for crushing the moving teeth 3a and the fixed teeth 3b as the crushing apparatus has been described as an example. However, the crushing apparatus is not limited to this. For example, a rotary crusher (a so-called roll) that crushes a roll-shaped rotating body having a crushing blade attached thereto as a pair, rotating the pair in opposite directions to each other, and sandwiching the lashes between the rotating bodies. Crusher) and a cutter on the axis arranged in parallel,
The present invention is also applicable to a crusher provided with a crushing device (so-called shredder) for shearing the waste by rotating in opposite directions. In these cases, the feeder 4 may be omitted.
In this case, a similar effect is obtained.

Further, in the above-described embodiment, the feeder 4, the jaw crusher 3, the conveyer 6, and the magnetic separator 7 are provided as devices related to the crushing operation. The magnetic separator 7 may be omitted as appropriate. In addition to these four, an auxiliary conveyor for extending the path of the conveyor 6 is provided on the downstream side (or upstream side) of the conveyor 6, and a vibrating screen for performing sorting according to the grain size of the jaw is provided with a jaw crusher. 3 may be provided on the downstream side. In these cases, a similar effect is obtained.

[0056]

According to the present invention, it is possible to always properly maintain the amount of waste supplied from the feeder to the crushing device with stable control.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram of a hydraulic drive device provided with a feeder control device according to the present embodiment.

FIG. 2 is a side view illustrating the entire structure of a self-propelled crusher to which the feeder control device is applied.

FIG. 3 is a side view showing an internal structure in a state where a side member in FIG. 2 is partially removed.

FIG. 4 is a diagram illustrating an operation state during a crushing operation.

FIG. 5 is a diagram showing a detailed structure of an operation panel.

FIG. 6 is a block diagram illustrating functions of a controller.

FIG. 7 is an enlarged view showing a structure near a jaw crusher.

FIG. 8 is a flowchart illustrating control contents by a feeder control unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Self-propelled crusher 2 Hopper 3 Jaw crusher (crushing apparatus) 3c Side plate 4 Feeder 5A, B Gala (rock, construction waste material, etc.) 6 Conveyor 87a High level sensor (upper sensor, first supply amount detecting means) 87b low level Sensor (lower sensor, second supply amount detecting means) 88 upper chute 90 controller 90d feeder controller

Claims (5)

[Claims] Claims: 1. At least a rock introduced from a hopper.
It has a crushing device for crushing construction waste material, etc., a conveyor for transporting rock, construction waste material, and the like crushed by the crushing device, and a feeder for supplying the rock, construction waste material, and the like input to the hopper to the crushing device. A feeder control device for the crusher, which is provided in the crusher and controls the operation of the feeder, wherein a first amount of the rock, the construction waste material, and the like supplied to the crusher is detected to be equal to or more than a first predetermined amount. Supply amount detection means, second supply amount detection means for detecting that the amount of the rock, construction waste, and the like supplied to the crushing device is equal to or greater than a second predetermined amount smaller than the first predetermined amount; A feeder control device for a crusher, comprising: speed control means for controlling an operation speed of the feeder in accordance with a detection signal of the first supply amount detection means and a detection signal of the second supply amount detection means. 2. A feeder control device for a crusher according to claim 1, wherein said speed control means determines that said supply amount of said rocks and construction waste material is equal to or greater than a first predetermined amount by said first supply amount detection means. Is detected, deceleration / stop signal output means for outputting a signal for decelerating or stopping the operation of the feeder, and the operation of the feeder is decelerated or stopped by a signal from the deceleration / stop signal output means. Thereafter, when the supply amount of the rock, the construction waste material, and the like is no longer detected by the second supply amount detection means to be equal to or more than the second predetermined amount, the operation of the feeder is returned to the state before deceleration or stop. And a return signal output means for outputting a signal for causing the crusher to output a signal. 3. The feeder control device for a crusher according to claim 2, wherein said deceleration / stop signal output means outputs said first supply amount detection means such that said supply amount of said rocks and construction waste material is equal to or more than a first predetermined amount. A signal for decelerating or stopping the operation of the feeder when a state in which the detection is continued for a predetermined period is output. 4. A feeder control device for a crusher according to claim 2, wherein said return signal output means supplies said rock, construction waste material, and the like at said second supply amount detection means to a second predetermined amount or more. A feeder control device for a crusher, which outputs a signal for decelerating the operation of the feeder or returning the feeder to a state before the stop when a state in which this is not detected continues for a predetermined period. 5. A feeder control device for a crusher according to claim 1, wherein said first supply amount detecting means is provided on a side plate of said crusher or on an upper chute above said crusher to remove rock, construction waste and the like. An upper sensor for detecting an uppermost position, wherein the second supply amount detecting means is provided on a side plate of the crusher or an upper chute above the crusher so as to be located below the upper sensor; A control device for a crusher feeder, comprising a lower sensor for detecting the uppermost position of construction waste and the like.